From c8a8aa0d43336491f6aa264467968e06b489d34c Mon Sep 17 00:00:00 2001 From: zelig Date: Sun, 18 Jan 2015 07:59:54 +0000 Subject: [PATCH 01/54] initial hook for crypto handshake (void, off by default) --- p2p/peer.go | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/p2p/peer.go b/p2p/peer.go index 2380a3285b..886b95a80b 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -70,6 +70,7 @@ type Peer struct { // These fields maintain the running protocols. protocols []Protocol runBaseProtocol bool // for testing + cryptoHandshake bool // for testing runlock sync.RWMutex // protects running running map[string]*proto @@ -141,6 +142,20 @@ func (p *Peer) Identity() ClientIdentity { return p.identity } +func (self *Peer) Pubkey() (pubkey []byte) { + self.infolock.Lock() + defer self.infolock.Unlock() + switch { + case self.identity != nil: + pubkey = self.identity.Pubkey() + case self.dialAddr != nil: + pubkey = self.dialAddr.Pubkey + case self.listenAddr != nil: + pubkey = self.listenAddr.Pubkey + } + return +} + // Caps returns the capabilities (supported subprotocols) of the remote peer. func (p *Peer) Caps() []Cap { p.infolock.Lock() @@ -207,6 +222,12 @@ func (p *Peer) loop() (reason DiscReason, err error) { defer close(p.closed) defer p.conn.Close() + if p.cryptoHandshake { + if err := p.handleCryptoHandshake(); err != nil { + return DiscProtocolError, err // no graceful disconnect + } + } + // read loop readMsg := make(chan Msg) readErr := make(chan error) @@ -307,6 +328,11 @@ func (p *Peer) dispatch(msg Msg, protoDone chan struct{}) (wait bool, err error) return wait, nil } +func (p *Peer) handleCryptoHandshake() (err error) { + + return nil +} + func (p *Peer) startBaseProtocol() { p.runlock.Lock() defer p.runlock.Unlock() From 88167f39a6437e282ff75a6ec30e8081d6d50441 Mon Sep 17 00:00:00 2001 From: zelig Date: Sun, 18 Jan 2015 08:03:39 +0000 Subject: [PATCH 02/54] add privkey to clientIdentity + tests --- p2p/client_identity.go | 15 +++++++++++---- p2p/client_identity_test.go | 11 ++++++++++- 2 files changed, 21 insertions(+), 5 deletions(-) diff --git a/p2p/client_identity.go b/p2p/client_identity.go index f15fd01bfc..fca2756bd6 100644 --- a/p2p/client_identity.go +++ b/p2p/client_identity.go @@ -7,8 +7,9 @@ import ( // ClientIdentity represents the identity of a peer. type ClientIdentity interface { - String() string // human readable identity - Pubkey() []byte // 512-bit public key + String() string // human readable identity + Pubkey() []byte // 512-bit public key + PrivKey() []byte // 512-bit private key } type SimpleClientIdentity struct { @@ -17,10 +18,11 @@ type SimpleClientIdentity struct { customIdentifier string os string implementation string + privkey []byte pubkey []byte } -func NewSimpleClientIdentity(clientIdentifier string, version string, customIdentifier string, pubkey []byte) *SimpleClientIdentity { +func NewSimpleClientIdentity(clientIdentifier string, version string, customIdentifier string, privkey []byte, pubkey []byte) *SimpleClientIdentity { clientIdentity := &SimpleClientIdentity{ clientIdentifier: clientIdentifier, version: version, @@ -28,6 +30,7 @@ func NewSimpleClientIdentity(clientIdentifier string, version string, customIden os: runtime.GOOS, implementation: runtime.Version(), pubkey: pubkey, + privkey: privkey, } return clientIdentity @@ -50,8 +53,12 @@ func (c *SimpleClientIdentity) String() string { c.implementation) } +func (c *SimpleClientIdentity) Privkey() []byte { + return c.privkey +} + func (c *SimpleClientIdentity) Pubkey() []byte { - return []byte(c.pubkey) + return c.pubkey } func (c *SimpleClientIdentity) SetCustomIdentifier(customIdentifier string) { diff --git a/p2p/client_identity_test.go b/p2p/client_identity_test.go index 7248a7b1a7..61c34fbf11 100644 --- a/p2p/client_identity_test.go +++ b/p2p/client_identity_test.go @@ -1,13 +1,22 @@ package p2p import ( + "bytes" "fmt" "runtime" "testing" ) func TestClientIdentity(t *testing.T) { - clientIdentity := NewSimpleClientIdentity("Ethereum(G)", "0.5.16", "test", []byte("pubkey")) + clientIdentity := NewSimpleClientIdentity("Ethereum(G)", "0.5.16", "test", []byte("privkey"), []byte("pubkey")) + key := clientIdentity.Privkey() + if !bytes.Equal(key, []byte("privkey")) { + t.Errorf("Expected Privkey to be %x, got %x", key, []byte("privkey")) + } + key = clientIdentity.Pubkey() + if !bytes.Equal(key, []byte("pubkey")) { + t.Errorf("Expected Pubkey to be %x, got %x", key, []byte("pubkey")) + } clientString := clientIdentity.String() expected := fmt.Sprintf("Ethereum(G)/v0.5.16/test/%s/%s", runtime.GOOS, runtime.Version()) if clientString != expected { From d227f6184e9d8ce21d40d032dedc910b2bd25f89 Mon Sep 17 00:00:00 2001 From: zelig Date: Sun, 18 Jan 2015 09:44:49 +0000 Subject: [PATCH 03/54] fix protocol to accomodate privkey --- p2p/protocol.go | 4 ++++ p2p/protocol_test.go | 11 ++++++++++- 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/p2p/protocol.go b/p2p/protocol.go index 1d121a8855..62ada929d7 100644 --- a/p2p/protocol.go +++ b/p2p/protocol.go @@ -64,6 +64,10 @@ func (h *handshake) Pubkey() []byte { return h.NodeID } +func (h *handshake) PrivKey() []byte { + return nil +} + // Cap is the structure of a peer capability. type Cap struct { Name string diff --git a/p2p/protocol_test.go b/p2p/protocol_test.go index b1d10ac536..6804a9d40b 100644 --- a/p2p/protocol_test.go +++ b/p2p/protocol_test.go @@ -11,7 +11,7 @@ import ( ) type peerId struct { - pubkey []byte + privKey, pubkey []byte } func (self *peerId) String() string { @@ -27,6 +27,15 @@ func (self *peerId) Pubkey() (pubkey []byte) { return } +func (self *peerId) PrivKey() (privKey []byte) { + privKey = self.privKey + if len(privKey) == 0 { + privKey = crypto.GenerateNewKeyPair().PublicKey + self.privKey = privKey + } + return +} + func newTestPeer() (peer *Peer) { peer = NewPeer(&peerId{}, []Cap{}) peer.pubkeyHook = func(*peerAddr) error { return nil } From 4e52adb84a2cda50877aa92584c9d1675cf51b62 Mon Sep 17 00:00:00 2001 From: zelig Date: Sun, 18 Jan 2015 09:46:08 +0000 Subject: [PATCH 04/54] add crypto auth logic to p2p --- p2p/crypto.go | 174 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 174 insertions(+) create mode 100644 p2p/crypto.go diff --git a/p2p/crypto.go b/p2p/crypto.go new file mode 100644 index 0000000000..9204fa9d0f --- /dev/null +++ b/p2p/crypto.go @@ -0,0 +1,174 @@ +package p2p + +import ( + "bytes" + "crypto/ecdsa" + "crypto/rand" + "fmt" + "io" + + "github.com/ethereum/go-ethereum/crypto" + "github.com/obscuren/ecies" + "github.com/obscuren/secp256k1-go" +) + +var ( + skLen int = 32 // ecies.MaxSharedKeyLength(pubKey) / 2 + sigLen int = 32 // elliptic S256 + pubKeyLen int = 32 // ECDSA + msgLen int = sigLen + 1 + pubKeyLen + skLen // 97 +) + +//, aesSecret, macSecret, egressMac, ingress +type secretRW struct { + aesSecret, macSecret, egressMac, ingressMac []byte +} + +type cryptoId struct { + prvKey *ecdsa.PrivateKey + pubKey *ecdsa.PublicKey + pubKeyR io.ReaderAt +} + +func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { + // will be at server init + var prvKeyDER []byte = id.PrivKey() + if prvKeyDER == nil { + err = fmt.Errorf("no private key for client") + return + } + // initialise ecies private key via importing DER encoded keys (known via our own clientIdentity) + var prvKey = crypto.ToECDSA(prvKeyDER) + if prvKey == nil { + err = fmt.Errorf("invalid private key for client") + return + } + self = &cryptoId{ + prvKey: prvKey, + // initialise public key from the imported private key + pubKey: &prvKey.PublicKey, + // to be created at server init shared between peers and sessions + // for reuse, call wth ReadAt, no reset seek needed + } + self.pubKeyR = bytes.NewReader(id.Pubkey()) + return +} + +// +func (self *cryptoId) setupAuth(remotePubKeyDER, sessionToken []byte) (auth []byte, nonce []byte, sharedKnowledge []byte, err error) { + // session init, common to both parties + var remotePubKey = crypto.ToECDSAPub(remotePubKeyDER) + if remotePubKey == nil { + err = fmt.Errorf("invalid remote public key") + return + } + var sharedSecret []byte + // generate shared key from prv and remote pubkey + sharedSecret, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remotePubKey), skLen, skLen) + if err != nil { + return + } + // check previous session token + if sessionToken == nil { + err = fmt.Errorf("no session token for peer") + return + } + // allocate msgLen long message + var msg []byte = make([]byte, msgLen) + // generate skLen long nonce at the end + nonce = msg[msgLen-skLen:] + if _, err = rand.Read(nonce); err != nil { + return + } + // create known message + // should use + // cipher.xorBytes from crypto/cipher/xor.go for fast xor + sharedKnowledge = Xor(sharedSecret, sessionToken) + var signedMsg = Xor(sharedKnowledge, nonce) + + // generate random keypair to use for signing + var ecdsaRandomPrvKey *ecdsa.PrivateKey + if ecdsaRandomPrvKey, err = crypto.GenerateKey(); err != nil { + return + } + // var ecdsaRandomPubKey *ecdsa.PublicKey + // ecdsaRandomPubKey= &ecdsaRandomPrvKey.PublicKey + + // message known to both parties ecdh-shared-secret^nonce^token + var signature []byte + // signature = sign(ecdhe-random, ecdh-shared-secret^nonce^token) + // uses secp256k1.Sign + if signature, err = crypto.Sign(signedMsg, ecdsaRandomPrvKey); err != nil { + return + } + // msg = signature || 0x80 || pubk || nonce + copy(msg, signature) + msg[sigLen] = 0x80 + self.pubKeyR.ReadAt(msg[sigLen+1:], int64(pubKeyLen)) // gives pubKeyLen, io.EOF (since we dont read onto the nonce) + + // auth = eciesEncrypt(remote-pubk, msg) + if auth, err = crypto.Encrypt(remotePubKey, msg); err != nil { + return + } + return +} + +func (self *cryptoId) verifyAuth(auth, nonce, sharedKnowledge []byte) (sessionToken []byte, rw *secretRW, err error) { + var msg []byte + // they prove that msg is meant for me, + // I prove I possess private key if i can read it + if msg, err = crypto.Decrypt(self.prvKey, auth); err != nil { + return + } + + var remoteNonce []byte = msg[msgLen-skLen:] + // I prove that i possess prv key (to derive shared secret, and read nonce off encrypted msg) and that I posessed the earlier one , our shared history + // they prove they possess their private key to derive the same shared secret, plus the same shared history (previous session token) + var signedMsg = Xor(sharedKnowledge, remoteNonce) + var remoteRandomPubKeyDER []byte + if remoteRandomPubKeyDER, err = secp256k1.RecoverPubkey(signedMsg, msg[:32]); err != nil { + return + } + var remoteRandomPubKey = crypto.ToECDSAPub(remoteRandomPubKeyDER) + if remoteRandomPubKey == nil { + err = fmt.Errorf("invalid remote public key") + return + } + // 3) Now we can trust ecdhe-random-pubk to derive keys + //ecdhe-shared-secret = ecdh.agree(ecdhe-random, remote-ecdhe-random-pubk) + var dhSharedSecret []byte + dhSharedSecret, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remoteRandomPubKey), skLen, skLen) + if err != nil { + return + } + // shared-secret = crypto.Sha3(ecdhe-shared-secret || crypto.Sha3(nonce || initiator-nonce)) + var sharedSecret []byte = crypto.Sha3(append(dhSharedSecret, crypto.Sha3(append(nonce, remoteNonce...))...)) + // token = crypto.Sha3(shared-secret) + sessionToken = crypto.Sha3(sharedSecret) + // aes-secret = crypto.Sha3(ecdhe-shared-secret || shared-secret) + var aesSecret = crypto.Sha3(append(dhSharedSecret, sharedSecret...)) + // # destroy shared-secret + // mac-secret = crypto.Sha3(ecdhe-shared-secret || aes-secret) + var macSecret = crypto.Sha3(append(dhSharedSecret, aesSecret...)) + // # destroy ecdhe-shared-secret + // egress-mac = crypto.Sha3(mac-secret^nonce || auth) + var egressMac = crypto.Sha3(append(Xor(macSecret, nonce), auth...)) + // # destroy nonce + // ingress-mac = crypto.Sha3(mac-secret^initiator-nonce || auth), + var ingressMac = crypto.Sha3(append(Xor(macSecret, remoteNonce), auth...)) + // # destroy remote-nonce + rw = &secretRW{ + aesSecret: aesSecret, + macSecret: macSecret, + egressMac: egressMac, + ingressMac: ingressMac, + } + return +} + +func Xor(one, other []byte) (xor []byte) { + for i := 0; i < len(one); i++ { + xor[i] = one[i] ^ other[i] + } + return +} From b855f671a508a7e8160cbdd27197ba83310b264c Mon Sep 17 00:00:00 2001 From: zelig Date: Sun, 18 Jan 2015 23:53:45 +0000 Subject: [PATCH 05/54] rewrite to comply with latest spec - correct sizes for the blocks : sec signature 65, ecies sklen 16, keylength 32 - added allocation to Xor (should be optimized later) - no pubkey reader needed, just do with copy - restructuring now into INITIATE, RESPOND, COMPLETE -> newSession initialises the encryption/authentication layer - crypto identity can be part of client identity, some initialisation when server created --- p2p/crypto.go | 191 ++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 138 insertions(+), 53 deletions(-) diff --git a/p2p/crypto.go b/p2p/crypto.go index 9204fa9d0f..6e3f360d92 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -1,11 +1,11 @@ package p2p import ( - "bytes" + // "bytes" "crypto/ecdsa" "crypto/rand" "fmt" - "io" + // "io" "github.com/ethereum/go-ethereum/crypto" "github.com/obscuren/ecies" @@ -13,21 +13,22 @@ import ( ) var ( - skLen int = 32 // ecies.MaxSharedKeyLength(pubKey) / 2 - sigLen int = 32 // elliptic S256 - pubKeyLen int = 32 // ECDSA - msgLen int = sigLen + 1 + pubKeyLen + skLen // 97 + sskLen int = 16 // ecies.MaxSharedKeyLength(pubKey) / 2 + sigLen int = 65 // elliptic S256 + keyLen int = 32 // ECDSA + msgLen int = sigLen + 3*keyLen + 1 // 162 + resLen int = 65 ) -//, aesSecret, macSecret, egressMac, ingress +// aesSecret, macSecret, egressMac, ingress type secretRW struct { aesSecret, macSecret, egressMac, ingressMac []byte } type cryptoId struct { - prvKey *ecdsa.PrivateKey - pubKey *ecdsa.PublicKey - pubKeyR io.ReaderAt + prvKey *ecdsa.PrivateKey + pubKey *ecdsa.PublicKey + pubKeyDER []byte } func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { @@ -50,99 +51,181 @@ func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { // to be created at server init shared between peers and sessions // for reuse, call wth ReadAt, no reset seek needed } - self.pubKeyR = bytes.NewReader(id.Pubkey()) + self.pubKeyDER = id.Pubkey() return } -// -func (self *cryptoId) setupAuth(remotePubKeyDER, sessionToken []byte) (auth []byte, nonce []byte, sharedKnowledge []byte, err error) { +// initAuth is called by peer if it initiated the connection +func (self *cryptoId) initAuth(remotePubKeyDER, sessionToken []byte) (auth []byte, initNonce []byte, remotePubKey *ecdsa.PublicKey, err error) { // session init, common to both parties - var remotePubKey = crypto.ToECDSAPub(remotePubKeyDER) + remotePubKey = crypto.ToECDSAPub(remotePubKeyDER) if remotePubKey == nil { err = fmt.Errorf("invalid remote public key") return } - var sharedSecret []byte - // generate shared key from prv and remote pubkey - sharedSecret, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remotePubKey), skLen, skLen) - if err != nil { - return - } - // check previous session token + + var tokenFlag byte if sessionToken == nil { - err = fmt.Errorf("no session token for peer") - return + // no session token found means we need to generate shared secret. + // ecies shared secret is used as initial session token for new peers + // generate shared key from prv and remote pubkey + if sessionToken, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remotePubKey), sskLen, sskLen); err != nil { + return + } + fmt.Printf("secret generated: %v %x", len(sessionToken), sessionToken) + // tokenFlag = 0x00 // redundant + } else { + // for known peers, we use stored token from the previous session + tokenFlag = 0x01 } - // allocate msgLen long message + + //E(remote-pubk, S(ecdhe-random, ecdh-shared-secret^nonce) || H(ecdhe-random-pubk) || pubk || nonce || 0x0) + // E(remote-pubk, S(ecdhe-random, token^nonce) || H(ecdhe-random-pubk) || pubk || nonce || 0x1) + // allocate msgLen long message, var msg []byte = make([]byte, msgLen) - // generate skLen long nonce at the end - nonce = msg[msgLen-skLen:] - if _, err = rand.Read(nonce); err != nil { + // generate sskLen long nonce + initNonce = msg[msgLen-keyLen-1 : msgLen-1] + // nonce = msg[msgLen-sskLen-1 : msgLen-1] + if _, err = rand.Read(initNonce); err != nil { return } // create known message - // should use - // cipher.xorBytes from crypto/cipher/xor.go for fast xor - sharedKnowledge = Xor(sharedSecret, sessionToken) - var signedMsg = Xor(sharedKnowledge, nonce) + // ecdh-shared-secret^nonce for new peers + // token^nonce for old peers + var sharedSecret = Xor(sessionToken, initNonce) // generate random keypair to use for signing var ecdsaRandomPrvKey *ecdsa.PrivateKey if ecdsaRandomPrvKey, err = crypto.GenerateKey(); err != nil { return } - // var ecdsaRandomPubKey *ecdsa.PublicKey - // ecdsaRandomPubKey= &ecdsaRandomPrvKey.PublicKey - - // message known to both parties ecdh-shared-secret^nonce^token + // sign shared secret (message known to both parties): shared-secret var signature []byte - // signature = sign(ecdhe-random, ecdh-shared-secret^nonce^token) + // signature = sign(ecdhe-random, shared-secret) // uses secp256k1.Sign - if signature, err = crypto.Sign(signedMsg, ecdsaRandomPrvKey); err != nil { + if signature, err = crypto.Sign(sharedSecret, ecdsaRandomPrvKey); err != nil { return } - // msg = signature || 0x80 || pubk || nonce - copy(msg, signature) - msg[sigLen] = 0x80 - self.pubKeyR.ReadAt(msg[sigLen+1:], int64(pubKeyLen)) // gives pubKeyLen, io.EOF (since we dont read onto the nonce) + fmt.Printf("signature generated: %v %x", len(signature), signature) + // message + // signed-shared-secret || H(ecdhe-random-pubk) || pubk || nonce || 0x0 + copy(msg, signature) // copy signed-shared-secret + // H(ecdhe-random-pubk) + copy(msg[sigLen:sigLen+keyLen], crypto.Sha3(crypto.FromECDSAPub(&ecdsaRandomPrvKey.PublicKey))) + // pubkey copied to the correct segment. + copy(msg[sigLen+keyLen:sigLen+2*keyLen], self.pubKeyDER) + // nonce is already in the slice + // stick tokenFlag byte to the end + msg[msgLen-1] = tokenFlag + + fmt.Printf("plaintext message generated: %v %x", len(msg), msg) + + // encrypt using remote-pubk // auth = eciesEncrypt(remote-pubk, msg) + if auth, err = crypto.Encrypt(remotePubKey, msg); err != nil { return } + fmt.Printf("encrypted message generated: %v %x\n used pubkey: %x\n", len(auth), auth, crypto.FromECDSAPub(remotePubKey)) + return } -func (self *cryptoId) verifyAuth(auth, nonce, sharedKnowledge []byte) (sessionToken []byte, rw *secretRW, err error) { +// verifyAuth is called by peer if it accepted (but not initiated) the connection +func (self *cryptoId) verifyAuth(auth, sharedSecret []byte, remotePubKey *ecdsa.PublicKey) (authResp []byte, respNonce []byte, initNonce []byte, remoteRandomPubKey *ecdsa.PublicKey, err error) { var msg []byte + fmt.Printf("encrypted message received: %v %x\n used pubkey: %x\n", len(auth), auth, crypto.FromECDSAPub(self.pubKey)) // they prove that msg is meant for me, // I prove I possess private key if i can read it if msg, err = crypto.Decrypt(self.prvKey, auth); err != nil { return } - var remoteNonce []byte = msg[msgLen-skLen:] - // I prove that i possess prv key (to derive shared secret, and read nonce off encrypted msg) and that I posessed the earlier one , our shared history - // they prove they possess their private key to derive the same shared secret, plus the same shared history (previous session token) - var signedMsg = Xor(sharedKnowledge, remoteNonce) + // var remoteNonce []byte = msg[msgLen-skLen-1 : msgLen-1] + initNonce = msg[msgLen-keyLen-1 : msgLen-1] + // I prove that i own prv key (to derive shared secret, and read nonce off encrypted msg) and that I own shared secret + // they prove they own the private key belonging to ecdhe-random-pubk + var signedMsg = Xor(sharedSecret, initNonce) var remoteRandomPubKeyDER []byte - if remoteRandomPubKeyDER, err = secp256k1.RecoverPubkey(signedMsg, msg[:32]); err != nil { + if remoteRandomPubKeyDER, err = secp256k1.RecoverPubkey(signedMsg, msg[:sigLen]); err != nil { return } - var remoteRandomPubKey = crypto.ToECDSAPub(remoteRandomPubKeyDER) + remoteRandomPubKey = crypto.ToECDSAPub(remoteRandomPubKeyDER) if remoteRandomPubKey == nil { err = fmt.Errorf("invalid remote public key") return } - // 3) Now we can trust ecdhe-random-pubk to derive keys + + var resp = make([]byte, 2*keyLen+1) + // generate sskLen long nonce + respNonce = msg[msgLen-keyLen-1 : msgLen-1] + if _, err = rand.Read(respNonce); err != nil { + return + } + // generate random keypair + var ecdsaRandomPrvKey *ecdsa.PrivateKey + if ecdsaRandomPrvKey, err = crypto.GenerateKey(); err != nil { + return + } + // var ecdsaRandomPubKey *ecdsa.PublicKey + // ecdsaRandomPubKey= &ecdsaRandomPrvKey.PublicKey + + // message + // E(remote-pubk, ecdhe-random-pubk || nonce || 0x0) + copy(resp[:keyLen], crypto.FromECDSAPub(&ecdsaRandomPrvKey.PublicKey)) + // pubkey copied to the correct segment. + copy(resp[keyLen:2*keyLen], self.pubKeyDER) + // nonce is already in the slice + // stick tokenFlag byte to the end + var tokenFlag byte + if sharedSecret == nil { + } else { + // for known peers, we use stored token from the previous session + tokenFlag = 0x01 + } + resp[resLen] = tokenFlag + + // encrypt using remote-pubk + // auth = eciesEncrypt(remote-pubk, msg) + // why not encrypt with ecdhe-random-remote + if authResp, err = crypto.Encrypt(remotePubKey, resp); err != nil { + return + } + return +} + +func (self *cryptoId) verifyAuthResp(auth []byte) (respNonce []byte, remoteRandomPubKey *ecdsa.PublicKey, tokenFlag bool, err error) { + var msg []byte + // they prove that msg is meant for me, + // I prove I possess private key if i can read it + if msg, err = crypto.Decrypt(self.prvKey, auth); err != nil { + return + } + + respNonce = msg[resLen-keyLen-1 : resLen-1] + var remoteRandomPubKeyDER = msg[:keyLen] + remoteRandomPubKey = crypto.ToECDSAPub(remoteRandomPubKeyDER) + if remoteRandomPubKey == nil { + err = fmt.Errorf("invalid ecdh random remote public key") + return + } + if msg[resLen-1] == 0x01 { + tokenFlag = true + } + return +} + +func (self *cryptoId) newSession(initNonce, respNonce, auth []byte, remoteRandomPubKey *ecdsa.PublicKey) (sessionToken []byte, rw *secretRW, err error) { + // 3) Now we can trust ecdhe-random-pubk to derive new keys //ecdhe-shared-secret = ecdh.agree(ecdhe-random, remote-ecdhe-random-pubk) var dhSharedSecret []byte - dhSharedSecret, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remoteRandomPubKey), skLen, skLen) + dhSharedSecret, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remoteRandomPubKey), sskLen, sskLen) if err != nil { return } // shared-secret = crypto.Sha3(ecdhe-shared-secret || crypto.Sha3(nonce || initiator-nonce)) - var sharedSecret []byte = crypto.Sha3(append(dhSharedSecret, crypto.Sha3(append(nonce, remoteNonce...))...)) + var sharedSecret = crypto.Sha3(append(dhSharedSecret, crypto.Sha3(append(respNonce, initNonce...))...)) // token = crypto.Sha3(shared-secret) sessionToken = crypto.Sha3(sharedSecret) // aes-secret = crypto.Sha3(ecdhe-shared-secret || shared-secret) @@ -152,10 +235,10 @@ func (self *cryptoId) verifyAuth(auth, nonce, sharedKnowledge []byte) (sessionTo var macSecret = crypto.Sha3(append(dhSharedSecret, aesSecret...)) // # destroy ecdhe-shared-secret // egress-mac = crypto.Sha3(mac-secret^nonce || auth) - var egressMac = crypto.Sha3(append(Xor(macSecret, nonce), auth...)) + var egressMac = crypto.Sha3(append(Xor(macSecret, respNonce), auth...)) // # destroy nonce // ingress-mac = crypto.Sha3(mac-secret^initiator-nonce || auth), - var ingressMac = crypto.Sha3(append(Xor(macSecret, remoteNonce), auth...)) + var ingressMac = crypto.Sha3(append(Xor(macSecret, initNonce), auth...)) // # destroy remote-nonce rw = &secretRW{ aesSecret: aesSecret, @@ -166,7 +249,9 @@ func (self *cryptoId) verifyAuth(auth, nonce, sharedKnowledge []byte) (sessionTo return } +// should use cipher.xorBytes from crypto/cipher/xor.go for fast xor func Xor(one, other []byte) (xor []byte) { + xor = make([]byte, len(one)) for i := 0; i < len(one); i++ { xor[i] = one[i] ^ other[i] } From 714b955d6e03a822af80b566b0fa73098761f57a Mon Sep 17 00:00:00 2001 From: zelig Date: Mon, 19 Jan 2015 00:55:24 +0000 Subject: [PATCH 06/54] fix crash - add session token check and fallback to shared secret in responder call too - use explicit length for the types of new messages - fix typo resp[resLen-1] = tokenFlag --- p2p/crypto.go | 51 +++++++++++++++++++++++++++++---------------------- 1 file changed, 29 insertions(+), 22 deletions(-) diff --git a/p2p/crypto.go b/p2p/crypto.go index 6e3f360d92..643bd431e4 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -17,7 +17,7 @@ var ( sigLen int = 65 // elliptic S256 keyLen int = 32 // ECDSA msgLen int = sigLen + 3*keyLen + 1 // 162 - resLen int = 65 + resLen int = 65 // ) // aesSecret, macSecret, egressMac, ingress @@ -133,7 +133,7 @@ func (self *cryptoId) initAuth(remotePubKeyDER, sessionToken []byte) (auth []byt } // verifyAuth is called by peer if it accepted (but not initiated) the connection -func (self *cryptoId) verifyAuth(auth, sharedSecret []byte, remotePubKey *ecdsa.PublicKey) (authResp []byte, respNonce []byte, initNonce []byte, remoteRandomPubKey *ecdsa.PublicKey, err error) { +func (self *cryptoId) verifyAuth(auth, sessionToken []byte, remotePubKey *ecdsa.PublicKey) (authResp []byte, respNonce []byte, initNonce []byte, remoteRandomPubKey *ecdsa.PublicKey, err error) { var msg []byte fmt.Printf("encrypted message received: %v %x\n used pubkey: %x\n", len(auth), auth, crypto.FromECDSAPub(self.pubKey)) // they prove that msg is meant for me, @@ -141,50 +141,57 @@ func (self *cryptoId) verifyAuth(auth, sharedSecret []byte, remotePubKey *ecdsa. if msg, err = crypto.Decrypt(self.prvKey, auth); err != nil { return } + fmt.Printf("\nplaintext message retrieved: %v %x\n", len(msg), msg) - // var remoteNonce []byte = msg[msgLen-skLen-1 : msgLen-1] + var tokenFlag byte + if sessionToken == nil { + // no session token found means we need to generate shared secret. + // ecies shared secret is used as initial session token for new peers + // generate shared key from prv and remote pubkey + if sessionToken, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remotePubKey), sskLen, sskLen); err != nil { + return + } + fmt.Printf("secret generated: %v %x", len(sessionToken), sessionToken) + // tokenFlag = 0x00 // redundant + } else { + // for known peers, we use stored token from the previous session + tokenFlag = 0x01 + } + + // the initiator nonce is read off the end of the message initNonce = msg[msgLen-keyLen-1 : msgLen-1] // I prove that i own prv key (to derive shared secret, and read nonce off encrypted msg) and that I own shared secret // they prove they own the private key belonging to ecdhe-random-pubk - var signedMsg = Xor(sharedSecret, initNonce) + // we can now reconstruct the signed message and recover the peers pubkey + var signedMsg = Xor(sessionToken, initNonce) var remoteRandomPubKeyDER []byte if remoteRandomPubKeyDER, err = secp256k1.RecoverPubkey(signedMsg, msg[:sigLen]); err != nil { return } + // convert to ECDSA standard remoteRandomPubKey = crypto.ToECDSAPub(remoteRandomPubKeyDER) if remoteRandomPubKey == nil { err = fmt.Errorf("invalid remote public key") return } - var resp = make([]byte, 2*keyLen+1) - // generate sskLen long nonce - respNonce = msg[msgLen-keyLen-1 : msgLen-1] + // now we find ourselves a long task too, fill it random + var resp = make([]byte, resLen) + // generate keyLen long nonce + respNonce = msg[resLen-keyLen-1 : msgLen-1] if _, err = rand.Read(respNonce); err != nil { return } - // generate random keypair + // generate random keypair for session var ecdsaRandomPrvKey *ecdsa.PrivateKey if ecdsaRandomPrvKey, err = crypto.GenerateKey(); err != nil { return } - // var ecdsaRandomPubKey *ecdsa.PublicKey - // ecdsaRandomPubKey= &ecdsaRandomPrvKey.PublicKey - - // message + // responder auth message // E(remote-pubk, ecdhe-random-pubk || nonce || 0x0) copy(resp[:keyLen], crypto.FromECDSAPub(&ecdsaRandomPrvKey.PublicKey)) - // pubkey copied to the correct segment. - copy(resp[keyLen:2*keyLen], self.pubKeyDER) // nonce is already in the slice - // stick tokenFlag byte to the end - var tokenFlag byte - if sharedSecret == nil { - } else { - // for known peers, we use stored token from the previous session - tokenFlag = 0x01 - } - resp[resLen] = tokenFlag + resp[resLen-1] = tokenFlag // encrypt using remote-pubk // auth = eciesEncrypt(remote-pubk, msg) From 3b6385b14624faee26445a3d98fa94efdb30d29a Mon Sep 17 00:00:00 2001 From: zelig Date: Mon, 19 Jan 2015 01:24:09 +0000 Subject: [PATCH 07/54] handshake test to crypto --- p2p/crypto.go | 2 -- p2p/crypto_test.go | 54 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+), 2 deletions(-) create mode 100644 p2p/crypto_test.go diff --git a/p2p/crypto.go b/p2p/crypto.go index 643bd431e4..10c82d3a11 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -1,11 +1,9 @@ package p2p import ( - // "bytes" "crypto/ecdsa" "crypto/rand" "fmt" - // "io" "github.com/ethereum/go-ethereum/crypto" "github.com/obscuren/ecies" diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go new file mode 100644 index 0000000000..6b4afb16a4 --- /dev/null +++ b/p2p/crypto_test.go @@ -0,0 +1,54 @@ +package p2p + +import ( + // "bytes" + "fmt" + "testing" + + "github.com/ethereum/go-ethereum/crypto" +) + +func TestCryptoHandshake(t *testing.T) { + var err error + var sessionToken []byte + prvInit, _ := crypto.GenerateKey() + pubInit := &prvInit.PublicKey + prvResp, _ := crypto.GenerateKey() + pubResp := &prvResp.PublicKey + + var initiator, responder *cryptoId + if initiator, err = newCryptoId(&peerId{crypto.FromECDSA(prvInit), crypto.FromECDSAPub(pubInit)}); err != nil { + return + } + if responder, err = newCryptoId(&peerId{crypto.FromECDSA(prvResp), crypto.FromECDSAPub(pubResp)}); err != nil { + return + } + + auth, initNonce, _, _ := initiator.initAuth(responder.pubKeyDER, sessionToken) + + response, remoteRespNonce, remoteInitNonce, remoteRandomPubKey, _ := responder.verifyAuth(auth, sessionToken, pubInit) + + respNonce, randomPubKey, _, _ := initiator.verifyAuthResp(response) + + fmt.Printf("%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n", auth, initNonce, response, remoteRespNonce, remoteInitNonce, remoteRandomPubKey, respNonce, randomPubKey) + // initSessionToken, initSecretRW, _ := initiator.newSession(initNonce, respNonce, auth, randomPubKey) + // respSessionToken, respSecretRW, _ := responder.newSession(remoteInitNonce, remoteRespNonce, auth, remoteRandomPubKey) + + // if !bytes.Equal(initSessionToken, respSessionToken) { + // t.Errorf("session tokens do not match") + // } + // // aesSecret, macSecret, egressMac, ingressMac + // if !bytes.Equal(initSecretRW.aesSecret, respSecretRW.aesSecret) { + // t.Errorf("AES secrets do not match") + // } + // if !bytes.Equal(initSecretRW.macSecret, respSecretRW.macSecret) { + // t.Errorf("macSecrets do not match") + // } + // if !bytes.Equal(initSecretRW.egressMac, respSecretRW.egressMac) { + // t.Errorf("egressMacs do not match") + // } + // if !bytes.Equal(initSecretRW.ingressMac, respSecretRW.ingressMac) { + // t.Errorf("ingressMacs do not match") + // } + +} From 076c382a7486ebf58f33e1e0df49e92dc877ea19 Mon Sep 17 00:00:00 2001 From: zelig Date: Mon, 19 Jan 2015 01:24:28 +0000 Subject: [PATCH 08/54] handshake test to crypto --- p2p/crypto_test.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go index 6b4afb16a4..1785b5c458 100644 --- a/p2p/crypto_test.go +++ b/p2p/crypto_test.go @@ -31,7 +31,7 @@ func TestCryptoHandshake(t *testing.T) { respNonce, randomPubKey, _, _ := initiator.verifyAuthResp(response) fmt.Printf("%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n", auth, initNonce, response, remoteRespNonce, remoteInitNonce, remoteRandomPubKey, respNonce, randomPubKey) - // initSessionToken, initSecretRW, _ := initiator.newSession(initNonce, respNonce, auth, randomPubKey) + initSessionToken, initSecretRW, _ := initiator.newSession(initNonce, respNonce, auth, randomPubKey) // respSessionToken, respSecretRW, _ := responder.newSession(remoteInitNonce, remoteRespNonce, auth, remoteRandomPubKey) // if !bytes.Equal(initSessionToken, respSessionToken) { From 489d956283390b701473edd4a597afea2c426d41 Mon Sep 17 00:00:00 2001 From: zelig Date: Mon, 19 Jan 2015 04:53:48 +0000 Subject: [PATCH 09/54] completed the test. FAIL now. it crashes at diffie-hellman. ECIES -> secp256k1-go panics --- p2p/crypto.go | 45 +++++++++++++++++++++++-------------- p2p/crypto_test.go | 55 +++++++++++++++++++++++----------------------- 2 files changed, 57 insertions(+), 43 deletions(-) diff --git a/p2p/crypto.go b/p2p/crypto.go index 10c82d3a11..37c6e1fc98 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -53,10 +53,24 @@ func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { return } -// initAuth is called by peer if it initiated the connection -func (self *cryptoId) initAuth(remotePubKeyDER, sessionToken []byte) (auth []byte, initNonce []byte, remotePubKey *ecdsa.PublicKey, err error) { +/* startHandshake is called by peer if it initiated the connection. + By protocol spec, the party who initiates the connection (initiator) will send an 'auth' packet +New: authInitiator -> E(remote-pubk, S(ecdhe-random, ecdh-shared-secret^nonce) || H(ecdhe-random-pubk) || pubk || nonce || 0x0) + authRecipient -> E(remote-pubk, ecdhe-random-pubk || nonce || 0x0) + +Known: authInitiator = E(remote-pubk, S(ecdhe-random, token^nonce) || H(ecdhe-random-pubk) || pubk || nonce || 0x1) + authRecipient = E(remote-pubk, ecdhe-random-pubk || nonce || 0x1) // token found + authRecipient = E(remote-pubk, ecdhe-random-pubk || nonce || 0x0) // token not found + +The caller provides the public key of the peer as conjuctured from lookup based on IP:port, given as user input or proven by signatures. The caller must have access to persistant information about the peers, and pass the previous session token as an argument to cryptoId. + +The handshake is the process by which the peers establish their connection for a session. + +*/ + +func (self *cryptoId) startHandshake(remotePubKeyDER, sessionToken []byte) (auth []byte, initNonce []byte, randomPrvKey *ecdsa.PrivateKey, randomPubKey *ecdsa.PublicKey, err error) { // session init, common to both parties - remotePubKey = crypto.ToECDSAPub(remotePubKeyDER) + remotePubKey := crypto.ToECDSAPub(remotePubKeyDER) if remotePubKey == nil { err = fmt.Errorf("invalid remote public key") return @@ -70,6 +84,7 @@ func (self *cryptoId) initAuth(remotePubKeyDER, sessionToken []byte) (auth []byt if sessionToken, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remotePubKey), sskLen, sskLen); err != nil { return } + // this will not stay here ;) fmt.Printf("secret generated: %v %x", len(sessionToken), sessionToken) // tokenFlag = 0x00 // redundant } else { @@ -93,15 +108,14 @@ func (self *cryptoId) initAuth(remotePubKeyDER, sessionToken []byte) (auth []byt var sharedSecret = Xor(sessionToken, initNonce) // generate random keypair to use for signing - var ecdsaRandomPrvKey *ecdsa.PrivateKey - if ecdsaRandomPrvKey, err = crypto.GenerateKey(); err != nil { + if randomPrvKey, err = crypto.GenerateKey(); err != nil { return } // sign shared secret (message known to both parties): shared-secret var signature []byte // signature = sign(ecdhe-random, shared-secret) // uses secp256k1.Sign - if signature, err = crypto.Sign(sharedSecret, ecdsaRandomPrvKey); err != nil { + if signature, err = crypto.Sign(sharedSecret, randomPrvKey); err != nil { return } fmt.Printf("signature generated: %v %x", len(signature), signature) @@ -110,7 +124,7 @@ func (self *cryptoId) initAuth(remotePubKeyDER, sessionToken []byte) (auth []byt // signed-shared-secret || H(ecdhe-random-pubk) || pubk || nonce || 0x0 copy(msg, signature) // copy signed-shared-secret // H(ecdhe-random-pubk) - copy(msg[sigLen:sigLen+keyLen], crypto.Sha3(crypto.FromECDSAPub(&ecdsaRandomPrvKey.PublicKey))) + copy(msg[sigLen:sigLen+keyLen], crypto.Sha3(crypto.FromECDSAPub(&randomPrvKey.PublicKey))) // pubkey copied to the correct segment. copy(msg[sigLen+keyLen:sigLen+2*keyLen], self.pubKeyDER) // nonce is already in the slice @@ -131,7 +145,7 @@ func (self *cryptoId) initAuth(remotePubKeyDER, sessionToken []byte) (auth []byt } // verifyAuth is called by peer if it accepted (but not initiated) the connection -func (self *cryptoId) verifyAuth(auth, sessionToken []byte, remotePubKey *ecdsa.PublicKey) (authResp []byte, respNonce []byte, initNonce []byte, remoteRandomPubKey *ecdsa.PublicKey, err error) { +func (self *cryptoId) respondToHandshake(auth, sessionToken []byte, remotePubKey *ecdsa.PublicKey) (authResp []byte, respNonce []byte, initNonce []byte, randomPrvKey *ecdsa.PrivateKey, err error) { var msg []byte fmt.Printf("encrypted message received: %v %x\n used pubkey: %x\n", len(auth), auth, crypto.FromECDSAPub(self.pubKey)) // they prove that msg is meant for me, @@ -167,7 +181,7 @@ func (self *cryptoId) verifyAuth(auth, sessionToken []byte, remotePubKey *ecdsa. return } // convert to ECDSA standard - remoteRandomPubKey = crypto.ToECDSAPub(remoteRandomPubKeyDER) + remoteRandomPubKey := crypto.ToECDSAPub(remoteRandomPubKeyDER) if remoteRandomPubKey == nil { err = fmt.Errorf("invalid remote public key") return @@ -181,13 +195,12 @@ func (self *cryptoId) verifyAuth(auth, sessionToken []byte, remotePubKey *ecdsa. return } // generate random keypair for session - var ecdsaRandomPrvKey *ecdsa.PrivateKey - if ecdsaRandomPrvKey, err = crypto.GenerateKey(); err != nil { + if randomPrvKey, err = crypto.GenerateKey(); err != nil { return } // responder auth message // E(remote-pubk, ecdhe-random-pubk || nonce || 0x0) - copy(resp[:keyLen], crypto.FromECDSAPub(&ecdsaRandomPrvKey.PublicKey)) + copy(resp[:keyLen], crypto.FromECDSAPub(&randomPrvKey.PublicKey)) // nonce is already in the slice resp[resLen-1] = tokenFlag @@ -200,7 +213,7 @@ func (self *cryptoId) verifyAuth(auth, sessionToken []byte, remotePubKey *ecdsa. return } -func (self *cryptoId) verifyAuthResp(auth []byte) (respNonce []byte, remoteRandomPubKey *ecdsa.PublicKey, tokenFlag bool, err error) { +func (self *cryptoId) completeHandshake(auth []byte) (respNonce []byte, remoteRandomPubKey *ecdsa.PublicKey, tokenFlag bool, err error) { var msg []byte // they prove that msg is meant for me, // I prove I possess private key if i can read it @@ -221,12 +234,12 @@ func (self *cryptoId) verifyAuthResp(auth []byte) (respNonce []byte, remoteRando return } -func (self *cryptoId) newSession(initNonce, respNonce, auth []byte, remoteRandomPubKey *ecdsa.PublicKey) (sessionToken []byte, rw *secretRW, err error) { +func (self *cryptoId) newSession(initNonce, respNonce, auth []byte, privKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey) (sessionToken []byte, rw *secretRW, err error) { // 3) Now we can trust ecdhe-random-pubk to derive new keys //ecdhe-shared-secret = ecdh.agree(ecdhe-random, remote-ecdhe-random-pubk) var dhSharedSecret []byte - dhSharedSecret, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remoteRandomPubKey), sskLen, sskLen) - if err != nil { + pubKey := ecies.ImportECDSAPublic(remoteRandomPubKey) + if dhSharedSecret, err = ecies.ImportECDSA(privKey).GenerateShared(pubKey, sskLen, sskLen); err != nil { return } // shared-secret = crypto.Sha3(ecdhe-shared-secret || crypto.Sha3(nonce || initiator-nonce)) diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go index 1785b5c458..cfb2d19d1a 100644 --- a/p2p/crypto_test.go +++ b/p2p/crypto_test.go @@ -1,7 +1,7 @@ package p2p import ( - // "bytes" + "bytes" "fmt" "testing" @@ -24,31 +24,32 @@ func TestCryptoHandshake(t *testing.T) { return } - auth, initNonce, _, _ := initiator.initAuth(responder.pubKeyDER, sessionToken) - - response, remoteRespNonce, remoteInitNonce, remoteRandomPubKey, _ := responder.verifyAuth(auth, sessionToken, pubInit) - - respNonce, randomPubKey, _, _ := initiator.verifyAuthResp(response) - - fmt.Printf("%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n", auth, initNonce, response, remoteRespNonce, remoteInitNonce, remoteRandomPubKey, respNonce, randomPubKey) - initSessionToken, initSecretRW, _ := initiator.newSession(initNonce, respNonce, auth, randomPubKey) - // respSessionToken, respSecretRW, _ := responder.newSession(remoteInitNonce, remoteRespNonce, auth, remoteRandomPubKey) - - // if !bytes.Equal(initSessionToken, respSessionToken) { - // t.Errorf("session tokens do not match") - // } - // // aesSecret, macSecret, egressMac, ingressMac - // if !bytes.Equal(initSecretRW.aesSecret, respSecretRW.aesSecret) { - // t.Errorf("AES secrets do not match") - // } - // if !bytes.Equal(initSecretRW.macSecret, respSecretRW.macSecret) { - // t.Errorf("macSecrets do not match") - // } - // if !bytes.Equal(initSecretRW.egressMac, respSecretRW.egressMac) { - // t.Errorf("egressMacs do not match") - // } - // if !bytes.Equal(initSecretRW.ingressMac, respSecretRW.ingressMac) { - // t.Errorf("ingressMacs do not match") - // } + auth, initNonce, randomPrvKey, randomPubKey, _ := initiator.initAuth(responder.pubKeyDER, sessionToken) + + response, remoteRespNonce, remoteInitNonce, remoteRandomPrivKey, _ := responder.verifyAuth(auth, sessionToken, pubInit) + + respNonce, remoteRandomPubKey, _, _ := initiator.verifyAuthResp(response) + + initSessionToken, initSecretRW, _ := initiator.newSession(initNonce, respNonce, auth, randomPrvKey, remoteRandomPubKey) + respSessionToken, respSecretRW, _ := responder.newSession(remoteInitNonce, remoteRespNonce, auth, remoteRandomPrivKey, randomPubKey) + + fmt.Printf("%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n", auth, initNonce, response, remoteRespNonce, remoteInitNonce, remoteRandomPubKey, respNonce, randomPubKey, initSessionToken, initSecretRW) + + if !bytes.Equal(initSessionToken, respSessionToken) { + t.Errorf("session tokens do not match") + } + // aesSecret, macSecret, egressMac, ingressMac + if !bytes.Equal(initSecretRW.aesSecret, respSecretRW.aesSecret) { + t.Errorf("AES secrets do not match") + } + if !bytes.Equal(initSecretRW.macSecret, respSecretRW.macSecret) { + t.Errorf("macSecrets do not match") + } + if !bytes.Equal(initSecretRW.egressMac, respSecretRW.egressMac) { + t.Errorf("egressMacs do not match") + } + if !bytes.Equal(initSecretRW.ingressMac, respSecretRW.ingressMac) { + t.Errorf("ingressMacs do not match") + } } From 1803c65e4097b9d6cb83f72a8a09aeddcc01f685 Mon Sep 17 00:00:00 2001 From: zelig Date: Mon, 19 Jan 2015 11:21:13 +0000 Subject: [PATCH 10/54] integrate cryptoId into peer and connection lifecycle --- p2p/crypto.go | 15 +++++++++++++++ p2p/peer.go | 21 ++++++++++++++++++--- 2 files changed, 33 insertions(+), 3 deletions(-) diff --git a/p2p/crypto.go b/p2p/crypto.go index 37c6e1fc98..728b8e884e 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -53,6 +53,21 @@ func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { return } +func (self *cryptoId) Run(remotePubKeyDER []byte) (rw *secretRW) { + if self.initiator { + auth, initNonce, randomPrvKey, randomPubKey, err := initiator.initAuth(remotePubKeyDER, sessionToken) + + respNonce, remoteRandomPubKey, _, _ := initiator.verifyAuthResp(response) + } else { + // we are listening connection. we are responders in the haandshake. + // Extract info from the authentication. The initiator starts by sending us a handshake that we need to respond to. + response, remoteRespNonce, remoteInitNonce, remoteRandomPrivKey, _ := responder.verifyAuth(auth, sessionToken, pubInit) + + } + initSessionToken, initSecretRW, _ := initiator.newSession(initNonce, respNonce, auth, randomPrvKey, remoteRandomPubKey) + respSessionToken, respSecretRW, _ := responder.newSession(remoteInitNonce, remoteRespNonce, auth, remoteRandomPrivKey, randomPubKey) +} + /* startHandshake is called by peer if it initiated the connection. By protocol spec, the party who initiates the connection (initiator) will send an 'auth' packet New: authInitiator -> E(remote-pubk, S(ecdhe-random, ecdh-shared-secret^nonce) || H(ecdhe-random-pubk) || pubk || nonce || 0x0) diff --git a/p2p/peer.go b/p2p/peer.go index 886b95a80b..e98c3d5608 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -222,10 +222,14 @@ func (p *Peer) loop() (reason DiscReason, err error) { defer close(p.closed) defer p.conn.Close() + var readLoop func(chan Msg, chan error, chan bool) if p.cryptoHandshake { - if err := p.handleCryptoHandshake(); err != nil { + if readLoop, err := p.handleCryptoHandshake(); err != nil { + // from here on everything can be encrypted, authenticated return DiscProtocolError, err // no graceful disconnect } + } else { + readLoop = p.readLoop } // read loop @@ -233,7 +237,7 @@ func (p *Peer) loop() (reason DiscReason, err error) { readErr := make(chan error) readNext := make(chan bool, 1) protoDone := make(chan struct{}, 1) - go p.readLoop(readMsg, readErr, readNext) + go readLoop(readMsg, readErr, readNext) readNext <- true if p.runBaseProtocol { @@ -329,8 +333,19 @@ func (p *Peer) dispatch(msg Msg, protoDone chan struct{}) (wait bool, err error) } func (p *Peer) handleCryptoHandshake() (err error) { + // cryptoId is just created for the lifecycle of the handshake + // it is survived by an encrypted readwriter + if p.dialAddr != 0 { // this should have its own method Outgoing() bool + initiator = true + } + // create crypto layer + cryptoId := newCryptoId(p.identity, initiator, sessionToken) + // run on peer + if rw, err := cryptoId.Run(p.Pubkey()); err != nil { + return err + } + p.conn = rw.Run(p.conn) - return nil } func (p *Peer) startBaseProtocol() { From e252c634cb40c8ef7f9bcd542f5418a937929620 Mon Sep 17 00:00:00 2001 From: zelig Date: Mon, 19 Jan 2015 23:42:13 +0000 Subject: [PATCH 11/54] first stab at integrating crypto in our p2p - abstract the entire handshake logic in cryptoId.Run() taking session-relevant parameters - changes in peer to accomodate how the encryption layer would be switched on - modify arguments of handshake components - fixed test getting the wrong pubkey but it till crashes on DH in newSession() --- p2p/crypto.go | 53 +++++++++++++++++++++++++++++++++------------- p2p/crypto_test.go | 39 +++++++++++++++++----------------- p2p/peer.go | 31 +++++++++++++++++++-------- 3 files changed, 79 insertions(+), 44 deletions(-) diff --git a/p2p/crypto.go b/p2p/crypto.go index 728b8e884e..b6d600826f 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -4,6 +4,7 @@ import ( "crypto/ecdsa" "crypto/rand" "fmt" + "io" "github.com/ethereum/go-ethereum/crypto" "github.com/obscuren/ecies" @@ -53,19 +54,35 @@ func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { return } -func (self *cryptoId) Run(remotePubKeyDER []byte) (rw *secretRW) { - if self.initiator { - auth, initNonce, randomPrvKey, randomPubKey, err := initiator.initAuth(remotePubKeyDER, sessionToken) - - respNonce, remoteRandomPubKey, _, _ := initiator.verifyAuthResp(response) +func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyDER []byte, sessionToken []byte, initiator bool) (token []byte, rw *secretRW, err error) { + var auth, initNonce, recNonce []byte + var randomPrivKey *ecdsa.PrivateKey + var remoteRandomPubKey *ecdsa.PublicKey + if initiator { + if auth, initNonce, randomPrivKey, _, err = self.startHandshake(remotePubKeyDER, sessionToken); err != nil { + return + } + conn.Write(auth) + var response []byte + conn.Read(response) + // write out auth message + // wait for response, then call complete + if recNonce, remoteRandomPubKey, _, err = self.completeHandshake(response); err != nil { + return + } } else { - // we are listening connection. we are responders in the haandshake. + conn.Read(auth) + // we are listening connection. we are responders in the handshake. // Extract info from the authentication. The initiator starts by sending us a handshake that we need to respond to. - response, remoteRespNonce, remoteInitNonce, remoteRandomPrivKey, _ := responder.verifyAuth(auth, sessionToken, pubInit) - + // so we read auth message first, then respond + var response []byte + if response, recNonce, initNonce, randomPrivKey, err = self.respondToHandshake(auth, remotePubKeyDER, sessionToken); err != nil { + return + } + remoteRandomPubKey = &randomPrivKey.PublicKey + conn.Write(response) } - initSessionToken, initSecretRW, _ := initiator.newSession(initNonce, respNonce, auth, randomPrvKey, remoteRandomPubKey) - respSessionToken, respSecretRW, _ := responder.newSession(remoteInitNonce, remoteRespNonce, auth, remoteRandomPrivKey, randomPubKey) + return self.newSession(initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) } /* startHandshake is called by peer if it initiated the connection. @@ -83,9 +100,9 @@ The handshake is the process by which the peers establish their connection for a */ -func (self *cryptoId) startHandshake(remotePubKeyDER, sessionToken []byte) (auth []byte, initNonce []byte, randomPrvKey *ecdsa.PrivateKey, randomPubKey *ecdsa.PublicKey, err error) { +func (self *cryptoId) startHandshake(remotePubKeyDER, sessionToken []byte) (auth []byte, initNonce []byte, randomPrvKey *ecdsa.PrivateKey, remotePubKey *ecdsa.PublicKey, err error) { // session init, common to both parties - remotePubKey := crypto.ToECDSAPub(remotePubKeyDER) + remotePubKey = crypto.ToECDSAPub(remotePubKeyDER) if remotePubKey == nil { err = fmt.Errorf("invalid remote public key") return @@ -160,8 +177,14 @@ func (self *cryptoId) startHandshake(remotePubKeyDER, sessionToken []byte) (auth } // verifyAuth is called by peer if it accepted (but not initiated) the connection -func (self *cryptoId) respondToHandshake(auth, sessionToken []byte, remotePubKey *ecdsa.PublicKey) (authResp []byte, respNonce []byte, initNonce []byte, randomPrvKey *ecdsa.PrivateKey, err error) { +func (self *cryptoId) respondToHandshake(auth, remotePubKeyDER, sessionToken []byte) (authResp []byte, respNonce []byte, initNonce []byte, randomPrivKey *ecdsa.PrivateKey, err error) { var msg []byte + remotePubKey := crypto.ToECDSAPub(remotePubKeyDER) + if remotePubKey == nil { + err = fmt.Errorf("invalid public key") + return + } + fmt.Printf("encrypted message received: %v %x\n used pubkey: %x\n", len(auth), auth, crypto.FromECDSAPub(self.pubKey)) // they prove that msg is meant for me, // I prove I possess private key if i can read it @@ -210,12 +233,12 @@ func (self *cryptoId) respondToHandshake(auth, sessionToken []byte, remotePubKey return } // generate random keypair for session - if randomPrvKey, err = crypto.GenerateKey(); err != nil { + if randomPrivKey, err = crypto.GenerateKey(); err != nil { return } // responder auth message // E(remote-pubk, ecdhe-random-pubk || nonce || 0x0) - copy(resp[:keyLen], crypto.FromECDSAPub(&randomPrvKey.PublicKey)) + copy(resp[:keyLen], crypto.FromECDSAPub(&randomPrivKey.PublicKey)) // nonce is already in the slice resp[resLen-1] = tokenFlag diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go index cfb2d19d1a..fb7df6b50e 100644 --- a/p2p/crypto_test.go +++ b/p2p/crypto_test.go @@ -11,44 +11,43 @@ import ( func TestCryptoHandshake(t *testing.T) { var err error var sessionToken []byte - prvInit, _ := crypto.GenerateKey() - pubInit := &prvInit.PublicKey - prvResp, _ := crypto.GenerateKey() - pubResp := &prvResp.PublicKey + prv0, _ := crypto.GenerateKey() + pub0 := &prv0.PublicKey + prv1, _ := crypto.GenerateKey() + pub1 := &prv1.PublicKey - var initiator, responder *cryptoId - if initiator, err = newCryptoId(&peerId{crypto.FromECDSA(prvInit), crypto.FromECDSAPub(pubInit)}); err != nil { + var initiator, receiver *cryptoId + if initiator, err = newCryptoId(&peerId{crypto.FromECDSA(prv0), crypto.FromECDSAPub(pub0)}); err != nil { return } - if responder, err = newCryptoId(&peerId{crypto.FromECDSA(prvResp), crypto.FromECDSAPub(pubResp)}); err != nil { + if receiver, err = newCryptoId(&peerId{crypto.FromECDSA(prv1), crypto.FromECDSAPub(pub1)}); err != nil { return } - auth, initNonce, randomPrvKey, randomPubKey, _ := initiator.initAuth(responder.pubKeyDER, sessionToken) + // simulate handshake by feeding output to input + auth, initNonce, randomPrivKey, _, _ := initiator.startHandshake(receiver.pubKeyDER, sessionToken) + response, remoteRecNonce, remoteInitNonce, remoteRandomPrivKey, _ := receiver.respondToHandshake(auth, crypto.FromECDSAPub(pub0), sessionToken) + recNonce, remoteRandomPubKey, _, _ := initiator.completeHandshake(response) - response, remoteRespNonce, remoteInitNonce, remoteRandomPrivKey, _ := responder.verifyAuth(auth, sessionToken, pubInit) + initSessionToken, initSecretRW, _ := initiator.newSession(initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) + recSessionToken, recSecretRW, _ := receiver.newSession(remoteInitNonce, remoteRecNonce, auth, remoteRandomPrivKey, &randomPrivKey.PublicKey) - respNonce, remoteRandomPubKey, _, _ := initiator.verifyAuthResp(response) + fmt.Printf("%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n", auth, initNonce, response, remoteRecNonce, remoteInitNonce, remoteRandomPubKey, recNonce, &randomPrivKey.PublicKey, initSessionToken, initSecretRW) - initSessionToken, initSecretRW, _ := initiator.newSession(initNonce, respNonce, auth, randomPrvKey, remoteRandomPubKey) - respSessionToken, respSecretRW, _ := responder.newSession(remoteInitNonce, remoteRespNonce, auth, remoteRandomPrivKey, randomPubKey) - - fmt.Printf("%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n", auth, initNonce, response, remoteRespNonce, remoteInitNonce, remoteRandomPubKey, respNonce, randomPubKey, initSessionToken, initSecretRW) - - if !bytes.Equal(initSessionToken, respSessionToken) { + if !bytes.Equal(initSessionToken, recSessionToken) { t.Errorf("session tokens do not match") } // aesSecret, macSecret, egressMac, ingressMac - if !bytes.Equal(initSecretRW.aesSecret, respSecretRW.aesSecret) { + if !bytes.Equal(initSecretRW.aesSecret, recSecretRW.aesSecret) { t.Errorf("AES secrets do not match") } - if !bytes.Equal(initSecretRW.macSecret, respSecretRW.macSecret) { + if !bytes.Equal(initSecretRW.macSecret, recSecretRW.macSecret) { t.Errorf("macSecrets do not match") } - if !bytes.Equal(initSecretRW.egressMac, respSecretRW.egressMac) { + if !bytes.Equal(initSecretRW.egressMac, recSecretRW.egressMac) { t.Errorf("egressMacs do not match") } - if !bytes.Equal(initSecretRW.ingressMac, respSecretRW.ingressMac) { + if !bytes.Equal(initSecretRW.ingressMac, recSecretRW.ingressMac) { t.Errorf("ingressMacs do not match") } diff --git a/p2p/peer.go b/p2p/peer.go index e98c3d5608..e3e04ee652 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -222,9 +222,9 @@ func (p *Peer) loop() (reason DiscReason, err error) { defer close(p.closed) defer p.conn.Close() - var readLoop func(chan Msg, chan error, chan bool) + var readLoop func(chan<- Msg, chan<- error, <-chan bool) if p.cryptoHandshake { - if readLoop, err := p.handleCryptoHandshake(); err != nil { + if readLoop, err = p.handleCryptoHandshake(); err != nil { // from here on everything can be encrypted, authenticated return DiscProtocolError, err // no graceful disconnect } @@ -332,20 +332,33 @@ func (p *Peer) dispatch(msg Msg, protoDone chan struct{}) (wait bool, err error) return wait, nil } -func (p *Peer) handleCryptoHandshake() (err error) { +type readLoop func(chan<- Msg, chan<- error, <-chan bool) + +func (p *Peer) handleCryptoHandshake() (loop readLoop, err error) { // cryptoId is just created for the lifecycle of the handshake // it is survived by an encrypted readwriter - if p.dialAddr != 0 { // this should have its own method Outgoing() bool + var initiator bool + var sessionToken []byte + if p.dialAddr != nil { // this should have its own method Outgoing() bool initiator = true } // create crypto layer - cryptoId := newCryptoId(p.identity, initiator, sessionToken) + // this could in principle run only once but maybe we want to allow + // identity switching + var crypto *cryptoId + if crypto, err = newCryptoId(p.ourID); err != nil { + return + } // run on peer - if rw, err := cryptoId.Run(p.Pubkey()); err != nil { - return err + // this bit handles the handshake and creates a secure communications channel with + // var rw *secretRW + if sessionToken, _, err = crypto.Run(p.conn, p.Pubkey(), sessionToken, initiator); err != nil { + return } - p.conn = rw.Run(p.conn) - + loop = func(msg chan<- Msg, err chan<- error, next <-chan bool) { + // this is the readloop :) + } + return } func (p *Peer) startBaseProtocol() { From 2e868566d7f4c97bd4a92c4943919ed52a55e9b1 Mon Sep 17 00:00:00 2001 From: zelig Date: Tue, 20 Jan 2015 00:23:10 +0000 Subject: [PATCH 12/54] add minor comments to the test --- p2p/crypto_test.go | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go index fb7df6b50e..33cdb3f83f 100644 --- a/p2p/crypto_test.go +++ b/p2p/crypto_test.go @@ -25,10 +25,14 @@ func TestCryptoHandshake(t *testing.T) { } // simulate handshake by feeding output to input + // initiator sends handshake 'auth' auth, initNonce, randomPrivKey, _, _ := initiator.startHandshake(receiver.pubKeyDER, sessionToken) + // receiver reads auth and responds with response response, remoteRecNonce, remoteInitNonce, remoteRandomPrivKey, _ := receiver.respondToHandshake(auth, crypto.FromECDSAPub(pub0), sessionToken) + // initiator reads receiver's response and the key exchange completes recNonce, remoteRandomPubKey, _, _ := initiator.completeHandshake(response) + // now both parties should have the same session parameters initSessionToken, initSecretRW, _ := initiator.newSession(initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) recSessionToken, recSecretRW, _ := receiver.newSession(remoteInitNonce, remoteRecNonce, auth, remoteRandomPrivKey, &randomPrivKey.PublicKey) From 923504ce3df504a843cfa775d577ac99bdbfdb70 Mon Sep 17 00:00:00 2001 From: zelig Date: Tue, 20 Jan 2015 00:41:45 +0000 Subject: [PATCH 13/54] add equality check for nonce and remote nonce --- p2p/crypto_test.go | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go index 33cdb3f83f..89baca0844 100644 --- a/p2p/crypto_test.go +++ b/p2p/crypto_test.go @@ -38,6 +38,12 @@ func TestCryptoHandshake(t *testing.T) { fmt.Printf("%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n", auth, initNonce, response, remoteRecNonce, remoteInitNonce, remoteRandomPubKey, recNonce, &randomPrivKey.PublicKey, initSessionToken, initSecretRW) + if !bytes.Equal(initNonce, remoteInitNonce) { + t.Errorf("nonces do not match") + } + if !bytes.Equal(recNonce, remoteRecNonce) { + t.Errorf("receiver nonces do not match") + } if !bytes.Equal(initSessionToken, recSessionToken) { t.Errorf("session tokens do not match") } From 58fc2c679b3d3b987aeefc98aa22db5f02717638 Mon Sep 17 00:00:00 2001 From: zelig Date: Tue, 20 Jan 2015 15:20:18 +0000 Subject: [PATCH 14/54] important fix for peer pubkey. when taken from identity, chop first format byte! --- p2p/peer.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/p2p/peer.go b/p2p/peer.go index e3e04ee652..e44eaab343 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -147,7 +147,7 @@ func (self *Peer) Pubkey() (pubkey []byte) { defer self.infolock.Unlock() switch { case self.identity != nil: - pubkey = self.identity.Pubkey() + pubkey = self.identity.Pubkey()[1:] case self.dialAddr != nil: pubkey = self.dialAddr.Pubkey case self.listenAddr != nil: From 364b7832811c19106456b3b30a34c7097a0b526e Mon Sep 17 00:00:00 2001 From: zelig Date: Tue, 20 Jan 2015 16:47:46 +0000 Subject: [PATCH 15/54] changes that fix it all: - set proper public key serialisation length in pubLen = 64 - reset all sizes and offsets - rename from DER to S (we are not using DER encoding) - add remoteInitRandomPubKey as return value to respondToHandshake - add ImportPublicKey with error return to read both EC golang.elliptic style 65 byte encoding and 64 byte one - add ExportPublicKey falling back to go-ethereum/crypto.FromECDSAPub() chopping off the first byte - add Import - Export tests - all tests pass --- p2p/crypto.go | 111 +++++++++++++++++++++++++-------------------- p2p/crypto_test.go | 92 ++++++++++++++++++++++++++++++++++--- 2 files changed, 146 insertions(+), 57 deletions(-) diff --git a/p2p/crypto.go b/p2p/crypto.go index b6d600826f..dbef022ccd 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -12,11 +12,12 @@ import ( ) var ( - sskLen int = 16 // ecies.MaxSharedKeyLength(pubKey) / 2 - sigLen int = 65 // elliptic S256 - keyLen int = 32 // ECDSA - msgLen int = sigLen + 3*keyLen + 1 // 162 - resLen int = 65 // + sskLen int = 16 // ecies.MaxSharedKeyLength(pubKey) / 2 + sigLen int = 65 // elliptic S256 + pubLen int = 64 // 512 bit pubkey in uncompressed representation without format byte + keyLen int = 32 // ECDSA + msgLen int = 194 // sigLen + keyLen + pubLen + keyLen + 1 = 194 + resLen int = 97 // pubLen + keyLen + 1 ) // aesSecret, macSecret, egressMac, ingress @@ -25,20 +26,21 @@ type secretRW struct { } type cryptoId struct { - prvKey *ecdsa.PrivateKey - pubKey *ecdsa.PublicKey - pubKeyDER []byte + prvKey *ecdsa.PrivateKey + pubKey *ecdsa.PublicKey + pubKeyS []byte } func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { // will be at server init - var prvKeyDER []byte = id.PrivKey() - if prvKeyDER == nil { + var prvKeyS []byte = id.PrivKey() + if prvKeyS == nil { err = fmt.Errorf("no private key for client") return } - // initialise ecies private key via importing DER encoded keys (known via our own clientIdentity) - var prvKey = crypto.ToECDSA(prvKeyDER) + // initialise ecies private key via importing keys (known via our own clientIdentity) + // the key format is what elliptic package is using: elliptic.Marshal(Curve, X, Y) + var prvKey = crypto.ToECDSA(prvKeyS) if prvKey == nil { err = fmt.Errorf("invalid private key for client") return @@ -50,16 +52,16 @@ func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { // to be created at server init shared between peers and sessions // for reuse, call wth ReadAt, no reset seek needed } - self.pubKeyDER = id.Pubkey() + self.pubKeyS = id.Pubkey() return } -func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyDER []byte, sessionToken []byte, initiator bool) (token []byte, rw *secretRW, err error) { +func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyS []byte, sessionToken []byte, initiator bool) (token []byte, rw *secretRW, err error) { var auth, initNonce, recNonce []byte var randomPrivKey *ecdsa.PrivateKey var remoteRandomPubKey *ecdsa.PublicKey if initiator { - if auth, initNonce, randomPrivKey, _, err = self.startHandshake(remotePubKeyDER, sessionToken); err != nil { + if auth, initNonce, randomPrivKey, _, err = self.startHandshake(remotePubKeyS, sessionToken); err != nil { return } conn.Write(auth) @@ -76,10 +78,9 @@ func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyDER []byte, sessionTok // Extract info from the authentication. The initiator starts by sending us a handshake that we need to respond to. // so we read auth message first, then respond var response []byte - if response, recNonce, initNonce, randomPrivKey, err = self.respondToHandshake(auth, remotePubKeyDER, sessionToken); err != nil { + if response, recNonce, initNonce, randomPrivKey, remoteRandomPubKey, err = self.respondToHandshake(auth, remotePubKeyS, sessionToken); err != nil { return } - remoteRandomPubKey = &randomPrivKey.PublicKey conn.Write(response) } return self.newSession(initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) @@ -100,11 +101,29 @@ The handshake is the process by which the peers establish their connection for a */ -func (self *cryptoId) startHandshake(remotePubKeyDER, sessionToken []byte) (auth []byte, initNonce []byte, randomPrvKey *ecdsa.PrivateKey, remotePubKey *ecdsa.PublicKey, err error) { +func ImportPublicKey(pubKey []byte) (pubKeyEC *ecdsa.PublicKey, err error) { + var pubKey65 []byte + switch len(pubKey) { + case 64: + pubKey65 = append([]byte{0x04}, pubKey...) + case 65: + pubKey65 = pubKey + default: + return nil, fmt.Errorf("invalid public key length %v (expect 64/65)", len(pubKey)) + } + return crypto.ToECDSAPub(pubKey65), nil +} + +func ExportPublicKey(pubKeyEC *ecdsa.PublicKey) (pubKey []byte, err error) { + if pubKeyEC == nil { + return nil, fmt.Errorf("no ECDSA public key given") + } + return crypto.FromECDSAPub(pubKeyEC)[1:], nil +} + +func (self *cryptoId) startHandshake(remotePubKeyS, sessionToken []byte) (auth []byte, initNonce []byte, randomPrvKey *ecdsa.PrivateKey, remotePubKey *ecdsa.PublicKey, err error) { // session init, common to both parties - remotePubKey = crypto.ToECDSAPub(remotePubKeyDER) - if remotePubKey == nil { - err = fmt.Errorf("invalid remote public key") + if remotePubKey, err = ImportPublicKey(remotePubKeyS); err != nil { return } @@ -116,8 +135,6 @@ func (self *cryptoId) startHandshake(remotePubKeyDER, sessionToken []byte) (auth if sessionToken, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remotePubKey), sskLen, sskLen); err != nil { return } - // this will not stay here ;) - fmt.Printf("secret generated: %v %x", len(sessionToken), sessionToken) // tokenFlag = 0x00 // redundant } else { // for known peers, we use stored token from the previous session @@ -128,9 +145,7 @@ func (self *cryptoId) startHandshake(remotePubKeyDER, sessionToken []byte) (auth // E(remote-pubk, S(ecdhe-random, token^nonce) || H(ecdhe-random-pubk) || pubk || nonce || 0x1) // allocate msgLen long message, var msg []byte = make([]byte, msgLen) - // generate sskLen long nonce initNonce = msg[msgLen-keyLen-1 : msgLen-1] - // nonce = msg[msgLen-sskLen-1 : msgLen-1] if _, err = rand.Read(initNonce); err != nil { return } @@ -150,48 +165,45 @@ func (self *cryptoId) startHandshake(remotePubKeyDER, sessionToken []byte) (auth if signature, err = crypto.Sign(sharedSecret, randomPrvKey); err != nil { return } - fmt.Printf("signature generated: %v %x", len(signature), signature) // message // signed-shared-secret || H(ecdhe-random-pubk) || pubk || nonce || 0x0 copy(msg, signature) // copy signed-shared-secret // H(ecdhe-random-pubk) - copy(msg[sigLen:sigLen+keyLen], crypto.Sha3(crypto.FromECDSAPub(&randomPrvKey.PublicKey))) + var randomPubKey64 []byte + if randomPubKey64, err = ExportPublicKey(&randomPrvKey.PublicKey); err != nil { + return + } + copy(msg[sigLen:sigLen+keyLen], crypto.Sha3(randomPubKey64)) // pubkey copied to the correct segment. - copy(msg[sigLen+keyLen:sigLen+2*keyLen], self.pubKeyDER) + copy(msg[sigLen+keyLen:sigLen+keyLen+pubLen], self.pubKeyS) // nonce is already in the slice // stick tokenFlag byte to the end msg[msgLen-1] = tokenFlag - fmt.Printf("plaintext message generated: %v %x", len(msg), msg) - // encrypt using remote-pubk // auth = eciesEncrypt(remote-pubk, msg) if auth, err = crypto.Encrypt(remotePubKey, msg); err != nil { return } - fmt.Printf("encrypted message generated: %v %x\n used pubkey: %x\n", len(auth), auth, crypto.FromECDSAPub(remotePubKey)) return } // verifyAuth is called by peer if it accepted (but not initiated) the connection -func (self *cryptoId) respondToHandshake(auth, remotePubKeyDER, sessionToken []byte) (authResp []byte, respNonce []byte, initNonce []byte, randomPrivKey *ecdsa.PrivateKey, err error) { +func (self *cryptoId) respondToHandshake(auth, remotePubKeyS, sessionToken []byte) (authResp []byte, respNonce []byte, initNonce []byte, randomPrivKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey, err error) { var msg []byte - remotePubKey := crypto.ToECDSAPub(remotePubKeyDER) - if remotePubKey == nil { - err = fmt.Errorf("invalid public key") + var remotePubKey *ecdsa.PublicKey + if remotePubKey, err = ImportPublicKey(remotePubKeyS); err != nil { return } - fmt.Printf("encrypted message received: %v %x\n used pubkey: %x\n", len(auth), auth, crypto.FromECDSAPub(self.pubKey)) // they prove that msg is meant for me, // I prove I possess private key if i can read it if msg, err = crypto.Decrypt(self.prvKey, auth); err != nil { return } - fmt.Printf("\nplaintext message retrieved: %v %x\n", len(msg), msg) var tokenFlag byte if sessionToken == nil { @@ -201,7 +213,6 @@ func (self *cryptoId) respondToHandshake(auth, remotePubKeyDER, sessionToken []b if sessionToken, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remotePubKey), sskLen, sskLen); err != nil { return } - fmt.Printf("secret generated: %v %x", len(sessionToken), sessionToken) // tokenFlag = 0x00 // redundant } else { // for known peers, we use stored token from the previous session @@ -214,21 +225,19 @@ func (self *cryptoId) respondToHandshake(auth, remotePubKeyDER, sessionToken []b // they prove they own the private key belonging to ecdhe-random-pubk // we can now reconstruct the signed message and recover the peers pubkey var signedMsg = Xor(sessionToken, initNonce) - var remoteRandomPubKeyDER []byte - if remoteRandomPubKeyDER, err = secp256k1.RecoverPubkey(signedMsg, msg[:sigLen]); err != nil { + var remoteRandomPubKeyS []byte + if remoteRandomPubKeyS, err = secp256k1.RecoverPubkey(signedMsg, msg[:sigLen]); err != nil { return } // convert to ECDSA standard - remoteRandomPubKey := crypto.ToECDSAPub(remoteRandomPubKeyDER) - if remoteRandomPubKey == nil { - err = fmt.Errorf("invalid remote public key") + if remoteRandomPubKey, err = ImportPublicKey(remoteRandomPubKeyS); err != nil { return } // now we find ourselves a long task too, fill it random var resp = make([]byte, resLen) // generate keyLen long nonce - respNonce = msg[resLen-keyLen-1 : msgLen-1] + respNonce = resp[pubLen : pubLen+keyLen] if _, err = rand.Read(respNonce); err != nil { return } @@ -238,7 +247,11 @@ func (self *cryptoId) respondToHandshake(auth, remotePubKeyDER, sessionToken []b } // responder auth message // E(remote-pubk, ecdhe-random-pubk || nonce || 0x0) - copy(resp[:keyLen], crypto.FromECDSAPub(&randomPrivKey.PublicKey)) + var randomPubKeyS []byte + if randomPubKeyS, err = ExportPublicKey(&randomPrivKey.PublicKey); err != nil { + return + } + copy(resp[:pubLen], randomPubKeyS) // nonce is already in the slice resp[resLen-1] = tokenFlag @@ -259,11 +272,9 @@ func (self *cryptoId) completeHandshake(auth []byte) (respNonce []byte, remoteRa return } - respNonce = msg[resLen-keyLen-1 : resLen-1] - var remoteRandomPubKeyDER = msg[:keyLen] - remoteRandomPubKey = crypto.ToECDSAPub(remoteRandomPubKeyDER) - if remoteRandomPubKey == nil { - err = fmt.Errorf("invalid ecdh random remote public key") + respNonce = msg[pubLen : pubLen+keyLen] + var remoteRandomPubKeyS = msg[:pubLen] + if remoteRandomPubKey, err = ImportPublicKey(remoteRandomPubKeyS); err != nil { return } if msg[resLen-1] == 0x01 { diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go index 89baca0844..8000efaf19 100644 --- a/p2p/crypto_test.go +++ b/p2p/crypto_test.go @@ -2,16 +2,76 @@ package p2p import ( "bytes" + // "crypto/ecdsa" + // "crypto/elliptic" + // "crypto/rand" "fmt" "testing" "github.com/ethereum/go-ethereum/crypto" + "github.com/obscuren/ecies" ) +func TestPublicKeyEncoding(t *testing.T) { + prv0, _ := crypto.GenerateKey() // = ecdsa.GenerateKey(crypto.S256(), rand.Reader) + pub0 := &prv0.PublicKey + pub0s := crypto.FromECDSAPub(pub0) + pub1, err := ImportPublicKey(pub0s) + if err != nil { + t.Errorf("%v", err) + } + eciesPub1 := ecies.ImportECDSAPublic(pub1) + if eciesPub1 == nil { + t.Errorf("invalid ecdsa public key") + } + pub1s, err := ExportPublicKey(pub1) + if err != nil { + t.Errorf("%v", err) + } + if len(pub1s) != 64 { + t.Errorf("wrong length expect 64, got", len(pub1s)) + } + pub2, err := ImportPublicKey(pub1s) + if err != nil { + t.Errorf("%v", err) + } + pub2s, err := ExportPublicKey(pub2) + if err != nil { + t.Errorf("%v", err) + } + if !bytes.Equal(pub1s, pub2s) { + t.Errorf("exports dont match") + } + pub2sEC := crypto.FromECDSAPub(pub2) + if !bytes.Equal(pub0s, pub2sEC) { + t.Errorf("exports dont match") + } +} + +func TestSharedSecret(t *testing.T) { + prv0, _ := crypto.GenerateKey() // = ecdsa.GenerateKey(crypto.S256(), rand.Reader) + pub0 := &prv0.PublicKey + prv1, _ := crypto.GenerateKey() + pub1 := &prv1.PublicKey + + ss0, err := ecies.ImportECDSA(prv0).GenerateShared(ecies.ImportECDSAPublic(pub1), sskLen, sskLen) + if err != nil { + return + } + ss1, err := ecies.ImportECDSA(prv1).GenerateShared(ecies.ImportECDSAPublic(pub0), sskLen, sskLen) + if err != nil { + return + } + t.Logf("Secret:\n%v %x\n%v %x", len(ss0), ss0, len(ss0), ss1) + if !bytes.Equal(ss0, ss1) { + t.Errorf("dont match :(") + } +} + func TestCryptoHandshake(t *testing.T) { var err error var sessionToken []byte - prv0, _ := crypto.GenerateKey() + prv0, _ := crypto.GenerateKey() // = ecdsa.GenerateKey(crypto.S256(), rand.Reader) pub0 := &prv0.PublicKey prv1, _ := crypto.GenerateKey() pub1 := &prv1.PublicKey @@ -26,17 +86,35 @@ func TestCryptoHandshake(t *testing.T) { // simulate handshake by feeding output to input // initiator sends handshake 'auth' - auth, initNonce, randomPrivKey, _, _ := initiator.startHandshake(receiver.pubKeyDER, sessionToken) + auth, initNonce, randomPrivKey, _, err := initiator.startHandshake(receiver.pubKeyS, sessionToken) + if err != nil { + t.Errorf("%v", err) + } + // receiver reads auth and responds with response - response, remoteRecNonce, remoteInitNonce, remoteRandomPrivKey, _ := receiver.respondToHandshake(auth, crypto.FromECDSAPub(pub0), sessionToken) + response, remoteRecNonce, remoteInitNonce, remoteRandomPrivKey, remoteInitRandomPubKey, err := receiver.respondToHandshake(auth, crypto.FromECDSAPub(pub0), sessionToken) + if err != nil { + t.Errorf("%v", err) + } + // initiator reads receiver's response and the key exchange completes - recNonce, remoteRandomPubKey, _, _ := initiator.completeHandshake(response) + recNonce, remoteRandomPubKey, _, err := initiator.completeHandshake(response) + if err != nil { + t.Errorf("%v", err) + } // now both parties should have the same session parameters - initSessionToken, initSecretRW, _ := initiator.newSession(initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) - recSessionToken, recSecretRW, _ := receiver.newSession(remoteInitNonce, remoteRecNonce, auth, remoteRandomPrivKey, &randomPrivKey.PublicKey) + initSessionToken, initSecretRW, err := initiator.newSession(initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) + if err != nil { + t.Errorf("%v", err) + } + + recSessionToken, recSecretRW, err := receiver.newSession(remoteInitNonce, remoteRecNonce, auth, remoteRandomPrivKey, remoteInitRandomPubKey) + if err != nil { + t.Errorf("%v", err) + } - fmt.Printf("%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n%x\n", auth, initNonce, response, remoteRecNonce, remoteInitNonce, remoteRandomPubKey, recNonce, &randomPrivKey.PublicKey, initSessionToken, initSecretRW) + fmt.Printf("\nauth %x\ninitNonce %x\nresponse%x\nremoteRecNonce %x\nremoteInitNonce %x\nremoteRandomPubKey %x\nrecNonce %x\nremoteInitRandomPubKey %x\ninitSessionToken %x\n\n", auth, initNonce, response, remoteRecNonce, remoteInitNonce, remoteRandomPubKey, recNonce, remoteInitRandomPubKey, initSessionToken) if !bytes.Equal(initNonce, remoteInitNonce) { t.Errorf("nonces do not match") From 4afde4e738e3981e086d6e8710c3d711d0e8531d Mon Sep 17 00:00:00 2001 From: zelig Date: Wed, 21 Jan 2015 10:22:07 +0000 Subject: [PATCH 16/54] add code documentation --- p2p/crypto.go | 62 ++++++++++++++++++++++++++++++++++++++------------- 1 file changed, 47 insertions(+), 15 deletions(-) diff --git a/p2p/crypto.go b/p2p/crypto.go index dbef022ccd..8551e317c7 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -20,17 +20,27 @@ var ( resLen int = 97 // pubLen + keyLen + 1 ) +// secretRW implements a message read writer with encryption and authentication +// it is initialised by cryptoId.Run() after a successful crypto handshake // aesSecret, macSecret, egressMac, ingress type secretRW struct { aesSecret, macSecret, egressMac, ingressMac []byte } +/* +cryptoId implements the crypto layer for the p2p networking +It is initialised on the node's own identity (which has access to the node's private key) and run separately on a peer connection to set up a secure session after a crypto handshake +After it performs a crypto handshake it returns +*/ type cryptoId struct { prvKey *ecdsa.PrivateKey pubKey *ecdsa.PublicKey pubKeyS []byte } +/* +newCryptoId(id ClientIdentity) initialises a crypto layer manager. This object has a short lifecycle when the peer connection starts. It is survived by a secretRW (an message read writer with encryption and authentication) if the crypto handshake is successful. +*/ func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { // will be at server init var prvKeyS []byte = id.PrivKey() @@ -56,6 +66,20 @@ func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { return } +/* +Run(connection, remotePublicKey, sessionToken) is called when the peer connection starts to set up a secure session by performing a crypto handshake. + + connection is (a buffered) network connection. + + remotePublicKey is the remote peer's node Id. + + sessionToken is the token from the previous session with this same peer. Nil if no token is found. + + initiator is a boolean flag. True if the node represented by cryptoId is the initiator of the connection (ie., remote is an outbound peer reached by dialing out). False if the connection was established by accepting a call from the remote peer via a listener. + + It returns a secretRW which implements the MsgReadWriter interface. +*/ + func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyS []byte, sessionToken []byte, initiator bool) (token []byte, rw *secretRW, err error) { var auth, initNonce, recNonce []byte var randomPrivKey *ecdsa.PrivateKey @@ -86,21 +110,9 @@ func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyS []byte, sessionToken return self.newSession(initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) } -/* startHandshake is called by peer if it initiated the connection. - By protocol spec, the party who initiates the connection (initiator) will send an 'auth' packet -New: authInitiator -> E(remote-pubk, S(ecdhe-random, ecdh-shared-secret^nonce) || H(ecdhe-random-pubk) || pubk || nonce || 0x0) - authRecipient -> E(remote-pubk, ecdhe-random-pubk || nonce || 0x0) - -Known: authInitiator = E(remote-pubk, S(ecdhe-random, token^nonce) || H(ecdhe-random-pubk) || pubk || nonce || 0x1) - authRecipient = E(remote-pubk, ecdhe-random-pubk || nonce || 0x1) // token found - authRecipient = E(remote-pubk, ecdhe-random-pubk || nonce || 0x0) // token not found - -The caller provides the public key of the peer as conjuctured from lookup based on IP:port, given as user input or proven by signatures. The caller must have access to persistant information about the peers, and pass the previous session token as an argument to cryptoId. - -The handshake is the process by which the peers establish their connection for a session. - +/* +ImportPublicKey creates a 512 bit *ecsda.PublicKey from a byte slice. It accepts the simple 64 byte uncompressed format or the 65 byte format given by calling elliptic.Marshal on the EC point represented by the key. Any other length will result in an invalid public key error. */ - func ImportPublicKey(pubKey []byte) (pubKeyEC *ecdsa.PublicKey, err error) { var pubKey65 []byte switch len(pubKey) { @@ -114,6 +126,9 @@ func ImportPublicKey(pubKey []byte) (pubKeyEC *ecdsa.PublicKey, err error) { return crypto.ToECDSAPub(pubKey65), nil } +/* +ExportPublicKey exports a *ecdsa.PublicKey into a byte slice using a simple 64-byte format. and is used for simple serialisation in network communication +*/ func ExportPublicKey(pubKeyEC *ecdsa.PublicKey) (pubKey []byte, err error) { if pubKeyEC == nil { return nil, fmt.Errorf("no ECDSA public key given") @@ -121,6 +136,12 @@ func ExportPublicKey(pubKeyEC *ecdsa.PublicKey) (pubKey []byte, err error) { return crypto.FromECDSAPub(pubKeyEC)[1:], nil } +/* startHandshake is called by if the node is the initiator of the connection. + +The caller provides the public key of the peer as conjuctured from lookup based on IP:port, given as user input or proven by signatures. The caller must have access to persistant information about the peers, and pass the previous session token as an argument to cryptoId. + +The first return value is the auth message that is to be sent out to the remote receiver. +*/ func (self *cryptoId) startHandshake(remotePubKeyS, sessionToken []byte) (auth []byte, initNonce []byte, randomPrvKey *ecdsa.PrivateKey, remotePubKey *ecdsa.PublicKey, err error) { // session init, common to both parties if remotePubKey, err = ImportPublicKey(remotePubKeyS); err != nil { @@ -191,7 +212,11 @@ func (self *cryptoId) startHandshake(remotePubKeyS, sessionToken []byte) (auth [ return } -// verifyAuth is called by peer if it accepted (but not initiated) the connection +/* +respondToHandshake is called by peer if it accepted (but not initiated) the connection from the remote. It is passed the initiator handshake received, the public key and session token belonging to the remote initiator. + +The first return value is the authentication response (aka receiver handshake) that is to be sent to the remote initiator. +*/ func (self *cryptoId) respondToHandshake(auth, remotePubKeyS, sessionToken []byte) (authResp []byte, respNonce []byte, initNonce []byte, randomPrivKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey, err error) { var msg []byte var remotePubKey *ecdsa.PublicKey @@ -264,6 +289,9 @@ func (self *cryptoId) respondToHandshake(auth, remotePubKeyS, sessionToken []byt return } +/* +completeHandshake is called when the initiator receives an authentication response (aka receiver handshake). It completes the handshake by reading off parameters the remote peer provides needed to set up the secure session +*/ func (self *cryptoId) completeHandshake(auth []byte) (respNonce []byte, remoteRandomPubKey *ecdsa.PublicKey, tokenFlag bool, err error) { var msg []byte // they prove that msg is meant for me, @@ -283,6 +311,9 @@ func (self *cryptoId) completeHandshake(auth []byte) (respNonce []byte, remoteRa return } +/* +newSession is called after the handshake is completed. The arguments are values negotiated in the handshake and the return value is a new session : a new session Token to be remembered for the next time we connect with this peer. And a MsgReadWriter that implements an encrypted and authenticated connection with key material obtained from the crypto handshake key exchange +*/ func (self *cryptoId) newSession(initNonce, respNonce, auth []byte, privKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey) (sessionToken []byte, rw *secretRW, err error) { // 3) Now we can trust ecdhe-random-pubk to derive new keys //ecdhe-shared-secret = ecdh.agree(ecdhe-random, remote-ecdhe-random-pubk) @@ -316,6 +347,7 @@ func (self *cryptoId) newSession(initNonce, respNonce, auth []byte, privKey *ecd return } +// TODO: optimisation // should use cipher.xorBytes from crypto/cipher/xor.go for fast xor func Xor(one, other []byte) (xor []byte) { xor = make([]byte, len(one)) From 1f2adb05b57b0b657bfa62b47d46e3a9bf1d8496 Mon Sep 17 00:00:00 2001 From: zelig Date: Wed, 21 Jan 2015 14:42:12 +0000 Subject: [PATCH 17/54] add initial peer level test (failing) --- p2p/crypto_test.go | 53 +++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 52 insertions(+), 1 deletion(-) diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go index 8000efaf19..5fbdc61e3e 100644 --- a/p2p/crypto_test.go +++ b/p2p/crypto_test.go @@ -6,6 +6,7 @@ import ( // "crypto/elliptic" // "crypto/rand" "fmt" + "net" "testing" "github.com/ethereum/go-ethereum/crypto" @@ -114,7 +115,9 @@ func TestCryptoHandshake(t *testing.T) { t.Errorf("%v", err) } - fmt.Printf("\nauth %x\ninitNonce %x\nresponse%x\nremoteRecNonce %x\nremoteInitNonce %x\nremoteRandomPubKey %x\nrecNonce %x\nremoteInitRandomPubKey %x\ninitSessionToken %x\n\n", auth, initNonce, response, remoteRecNonce, remoteInitNonce, remoteRandomPubKey, recNonce, remoteInitRandomPubKey, initSessionToken) + fmt.Printf("\nauth (%v) %x\n\nresp (%v) %x\n\n", len(auth), auth, len(response), response) + + // fmt.Printf("\nauth %x\ninitNonce %x\nresponse%x\nremoteRecNonce %x\nremoteInitNonce %x\nremoteRandomPubKey %x\nrecNonce %x\nremoteInitRandomPubKey %x\ninitSessionToken %x\n\n", auth, initNonce, response, remoteRecNonce, remoteInitNonce, remoteRandomPubKey, recNonce, remoteInitRandomPubKey, initSessionToken) if !bytes.Equal(initNonce, remoteInitNonce) { t.Errorf("nonces do not match") @@ -140,3 +143,51 @@ func TestCryptoHandshake(t *testing.T) { } } + +func TestPeersHandshake(t *testing.T) { + defer testlog(t).detach() + var err error + // var sessionToken []byte + prv0, _ := crypto.GenerateKey() // = ecdsa.GenerateKey(crypto.S256(), rand.Reader) + pub0 := &prv0.PublicKey + prv1, _ := crypto.GenerateKey() + pub1 := &prv1.PublicKey + + prv0s := crypto.FromECDSA(prv0) + pub0s := crypto.FromECDSAPub(pub0) + prv1s := crypto.FromECDSA(prv1) + pub1s := crypto.FromECDSAPub(pub1) + + conn1, conn2 := net.Pipe() + initiator := newPeer(conn1, []Protocol{}, nil) + receiver := newPeer(conn2, []Protocol{}, nil) + initiator.dialAddr = &peerAddr{IP: net.ParseIP("1.2.3.4"), Port: 2222, Pubkey: pub1s[1:]} + initiator.ourID = &peerId{prv0s, pub0s} + + // this is cheating. identity of initiator/dialler not available to listener/receiver + // its public key should be looked up based on IP address + receiver.identity = initiator.ourID + receiver.ourID = &peerId{prv1s, pub1s} + + initiator.pubkeyHook = func(*peerAddr) error { return nil } + receiver.pubkeyHook = func(*peerAddr) error { return nil } + + initiator.cryptoHandshake = true + receiver.cryptoHandshake = true + errc0 := make(chan error, 1) + errc1 := make(chan error, 1) + go func() { + _, err := initiator.loop() + errc0 <- err + }() + go func() { + _, err := receiver.loop() + errc1 <- err + }() + select { + case err = <-errc0: + t.Errorf("peer 0 quit with error: %v", err) + case err = <-errc1: + t.Errorf("peer 1 quit with error: %v", err) + } +} From 20aade56c3057a221d7fa7152a4969d5f8f980d5 Mon Sep 17 00:00:00 2001 From: zelig Date: Wed, 21 Jan 2015 14:45:53 +0000 Subject: [PATCH 18/54] chop first byte when cryptoid.PubKeyS is set from identity.Pubkey() since this is directly copied in the auth message --- p2p/crypto.go | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/p2p/crypto.go b/p2p/crypto.go index 8551e317c7..91d60aa7e3 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -7,10 +7,13 @@ import ( "io" "github.com/ethereum/go-ethereum/crypto" + ethlogger "github.com/ethereum/go-ethereum/logger" "github.com/obscuren/ecies" "github.com/obscuren/secp256k1-go" ) +var clogger = ethlogger.NewLogger("CRYPTOID") + var ( sskLen int = 16 // ecies.MaxSharedKeyLength(pubKey) / 2 sigLen int = 65 // elliptic S256 @@ -62,10 +65,17 @@ func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { // to be created at server init shared between peers and sessions // for reuse, call wth ReadAt, no reset seek needed } - self.pubKeyS = id.Pubkey() + self.pubKeyS = id.Pubkey()[1:] + clogger.Debugf("crytoid starting for %v", hexkey(self.pubKeyS)) return } +type hexkey []byte + +func (self hexkey) String() string { + return fmt.Sprintf("(%d) %x", len(self), []byte(self)) +} + /* Run(connection, remotePublicKey, sessionToken) is called when the peer connection starts to set up a secure session by performing a crypto handshake. From faa069a126da29a246193713568634e5be6edd2d Mon Sep 17 00:00:00 2001 From: zelig Date: Wed, 21 Jan 2015 16:22:49 +0000 Subject: [PATCH 19/54] peer-level integration test for crypto handshake - add const length params for handshake messages - add length check to fail early - add debug logs to help interop testing (!ABSOLUTELY SHOULD BE DELETED LATER) - wrap connection read/writes in error check - add cryptoReady channel in peer to signal when secure session setup is finished - wait for cryptoReady or timeout in TestPeersHandshake --- p2p/crypto.go | 53 ++++++++++++++++++++++++++++++++++++++++------ p2p/crypto_test.go | 11 ++++++++++ p2p/peer.go | 22 +++++++++++-------- 3 files changed, 71 insertions(+), 15 deletions(-) diff --git a/p2p/crypto.go b/p2p/crypto.go index 91d60aa7e3..e8f4d551bd 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -21,6 +21,8 @@ var ( keyLen int = 32 // ECDSA msgLen int = 194 // sigLen + keyLen + pubLen + keyLen + 1 = 194 resLen int = 97 // pubLen + keyLen + 1 + iHSLen int = 307 // size of the final ECIES payload sent as initiator's handshake + rHSLen int = 210 // size of the final ECIES payload sent as receiver's handshake ) // secretRW implements a message read writer with encryption and authentication @@ -66,7 +68,8 @@ func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { // for reuse, call wth ReadAt, no reset seek needed } self.pubKeyS = id.Pubkey()[1:] - clogger.Debugf("crytoid starting for %v", hexkey(self.pubKeyS)) + clogger.Debugf("initialise crypto for NodeId %v", hexkey(self.pubKeyS)) + clogger.Debugf("private-key %v\npublic key %v", hexkey(prvKeyS), hexkey(self.pubKeyS)) return } @@ -92,22 +95,51 @@ Run(connection, remotePublicKey, sessionToken) is called when the peer connectio func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyS []byte, sessionToken []byte, initiator bool) (token []byte, rw *secretRW, err error) { var auth, initNonce, recNonce []byte + var read int var randomPrivKey *ecdsa.PrivateKey var remoteRandomPubKey *ecdsa.PublicKey + clogger.Debugf("attempting session with %v", hexkey(remotePubKeyS)) if initiator { if auth, initNonce, randomPrivKey, _, err = self.startHandshake(remotePubKeyS, sessionToken); err != nil { return } - conn.Write(auth) - var response []byte - conn.Read(response) + clogger.Debugf("initiator-nonce: %v", hexkey(initNonce)) + clogger.Debugf("initiator-random-private-key: %v", hexkey(crypto.FromECDSA(randomPrivKey))) + randomPublicKeyS, _ := ExportPublicKey(&randomPrivKey.PublicKey) + clogger.Debugf("initiator-random-public-key: %v", hexkey(randomPublicKeyS)) + + if _, err = conn.Write(auth); err != nil { + return + } + clogger.Debugf("initiator handshake (sent to %v):\n%v", hexkey(remotePubKeyS), hexkey(auth)) + var response []byte = make([]byte, rHSLen) + if read, err = conn.Read(response); err != nil || read == 0 { + return + } + if read != rHSLen { + err = fmt.Errorf("remote receiver's handshake has invalid length. expect %v, got %v", rHSLen, read) + return + } // write out auth message // wait for response, then call complete if recNonce, remoteRandomPubKey, _, err = self.completeHandshake(response); err != nil { return } + clogger.Debugf("receiver-nonce: %v", hexkey(recNonce)) + remoteRandomPubKeyS, _ := ExportPublicKey(remoteRandomPubKey) + clogger.Debugf("receiver-random-public-key: %v", hexkey(remoteRandomPubKeyS)) + } else { - conn.Read(auth) + auth = make([]byte, iHSLen) + clogger.Debugf("waiting for initiator handshake (from %v)", hexkey(remotePubKeyS)) + if read, err = conn.Read(auth); err != nil { + return + } + if read != iHSLen { + err = fmt.Errorf("remote initiator's handshake has invalid length. expect %v, got %v", iHSLen, read) + return + } + clogger.Debugf("received initiator handshake (from %v):\n%v", hexkey(remotePubKeyS), hexkey(auth)) // we are listening connection. we are responders in the handshake. // Extract info from the authentication. The initiator starts by sending us a handshake that we need to respond to. // so we read auth message first, then respond @@ -115,7 +147,12 @@ func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyS []byte, sessionToken if response, recNonce, initNonce, randomPrivKey, remoteRandomPubKey, err = self.respondToHandshake(auth, remotePubKeyS, sessionToken); err != nil { return } - conn.Write(response) + clogger.Debugf("receiver-nonce: %v", hexkey(recNonce)) + clogger.Debugf("receiver-random-priv-key: %v", hexkey(crypto.FromECDSA(randomPrivKey))) + if _, err = conn.Write(response); err != nil { + return + } + clogger.Debugf("receiver handshake (sent to %v):\n%v", hexkey(remotePubKeyS), hexkey(response)) } return self.newSession(initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) } @@ -354,6 +391,10 @@ func (self *cryptoId) newSession(initNonce, respNonce, auth []byte, privKey *ecd egressMac: egressMac, ingressMac: ingressMac, } + clogger.Debugf("aes-secret: %v", hexkey(aesSecret)) + clogger.Debugf("mac-secret: %v", hexkey(macSecret)) + clogger.Debugf("egress-mac: %v", hexkey(egressMac)) + clogger.Debugf("ingress-mac: %v", hexkey(ingressMac)) return } diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go index 5fbdc61e3e..47b16040ae 100644 --- a/p2p/crypto_test.go +++ b/p2p/crypto_test.go @@ -8,6 +8,7 @@ import ( "fmt" "net" "testing" + "time" "github.com/ethereum/go-ethereum/crypto" "github.com/obscuren/ecies" @@ -184,7 +185,17 @@ func TestPeersHandshake(t *testing.T) { _, err := receiver.loop() errc1 <- err }() + ready := make(chan bool) + go func() { + <-initiator.cryptoReady + <-receiver.cryptoReady + close(ready) + }() + timeout := time.After(1 * time.Second) select { + case <-ready: + case <-timeout: + t.Errorf("crypto handshake hanging for too long") case err = <-errc0: t.Errorf("peer 0 quit with error: %v", err) case err = <-errc1: diff --git a/p2p/peer.go b/p2p/peer.go index e44eaab343..818f805802 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -71,6 +71,7 @@ type Peer struct { protocols []Protocol runBaseProtocol bool // for testing cryptoHandshake bool // for testing + cryptoReady chan struct{} runlock sync.RWMutex // protects running running map[string]*proto @@ -120,15 +121,16 @@ func newServerPeer(server *Server, conn net.Conn, dialAddr *peerAddr) *Peer { func newPeer(conn net.Conn, protocols []Protocol, dialAddr *peerAddr) *Peer { p := &Peer{ - Logger: logger.NewLogger("P2P " + conn.RemoteAddr().String()), - conn: conn, - dialAddr: dialAddr, - bufconn: bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn)), - protocols: protocols, - running: make(map[string]*proto), - disc: make(chan DiscReason), - protoErr: make(chan error), - closed: make(chan struct{}), + Logger: logger.NewLogger("P2P " + conn.RemoteAddr().String()), + conn: conn, + dialAddr: dialAddr, + bufconn: bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn)), + protocols: protocols, + running: make(map[string]*proto), + disc: make(chan DiscReason), + protoErr: make(chan error), + closed: make(chan struct{}), + cryptoReady: make(chan struct{}), } return p } @@ -240,6 +242,7 @@ func (p *Peer) loop() (reason DiscReason, err error) { go readLoop(readMsg, readErr, readNext) readNext <- true + close(p.cryptoReady) if p.runBaseProtocol { p.startBaseProtocol() } @@ -353,6 +356,7 @@ func (p *Peer) handleCryptoHandshake() (loop readLoop, err error) { // this bit handles the handshake and creates a secure communications channel with // var rw *secretRW if sessionToken, _, err = crypto.Run(p.conn, p.Pubkey(), sessionToken, initiator); err != nil { + p.Debugf("unable to setup secure session: %v", err) return } loop = func(msg chan<- Msg, err chan<- error, next <-chan bool) { From 54252ede3177cb169fbb9e4824a31ce58cb0316c Mon Sep 17 00:00:00 2001 From: zelig Date: Wed, 21 Jan 2015 16:53:13 +0000 Subject: [PATCH 20/54] add temporary forced session token generation --- p2p/crypto.go | 3 +++ p2p/peer.go | 5 +++++ 2 files changed, 8 insertions(+) diff --git a/p2p/crypto.go b/p2p/crypto.go index e8f4d551bd..f5307cd5a7 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -103,6 +103,9 @@ func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyS []byte, sessionToken if auth, initNonce, randomPrivKey, _, err = self.startHandshake(remotePubKeyS, sessionToken); err != nil { return } + if sessionToken != nil { + clogger.Debugf("session-token: %v", hexkey(sessionToken)) + } clogger.Debugf("initiator-nonce: %v", hexkey(initNonce)) clogger.Debugf("initiator-random-private-key: %v", hexkey(crypto.FromECDSA(randomPrivKey))) randomPublicKeyS, _ := ExportPublicKey(&randomPrivKey.PublicKey) diff --git a/p2p/peer.go b/p2p/peer.go index 818f805802..99f1a61d38 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -3,6 +3,7 @@ package p2p import ( "bufio" "bytes" + "crypto/rand" "fmt" "io" "io/ioutil" @@ -342,6 +343,10 @@ func (p *Peer) handleCryptoHandshake() (loop readLoop, err error) { // it is survived by an encrypted readwriter var initiator bool var sessionToken []byte + sessionToken = make([]byte, keyLen) + if _, err = rand.Read(sessionToken); err != nil { + return + } if p.dialAddr != nil { // this should have its own method Outgoing() bool initiator = true } From 4499743522d32990614c7d900d746e998a1b81ed Mon Sep 17 00:00:00 2001 From: zelig Date: Mon, 26 Jan 2015 14:50:12 +0000 Subject: [PATCH 21/54] apply handshake related improvements from p2p.crypto branch --- p2p/crypto.go | 44 +++++++++++++++++++++++--------------------- p2p/crypto_test.go | 14 +++++++------- p2p/peer.go | 2 +- 3 files changed, 31 insertions(+), 29 deletions(-) diff --git a/p2p/crypto.go b/p2p/crypto.go index f5307cd5a7..3610127438 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -7,20 +7,20 @@ import ( "io" "github.com/ethereum/go-ethereum/crypto" + "github.com/ethereum/go-ethereum/crypto/secp256k1" ethlogger "github.com/ethereum/go-ethereum/logger" "github.com/obscuren/ecies" - "github.com/obscuren/secp256k1-go" ) var clogger = ethlogger.NewLogger("CRYPTOID") -var ( +const ( sskLen int = 16 // ecies.MaxSharedKeyLength(pubKey) / 2 sigLen int = 65 // elliptic S256 pubLen int = 64 // 512 bit pubkey in uncompressed representation without format byte - keyLen int = 32 // ECDSA - msgLen int = 194 // sigLen + keyLen + pubLen + keyLen + 1 = 194 - resLen int = 97 // pubLen + keyLen + 1 + shaLen int = 32 // hash length (for nonce etc) + msgLen int = 194 // sigLen + shaLen + pubLen + shaLen + 1 = 194 + resLen int = 97 // pubLen + shaLen + 1 iHSLen int = 307 // size of the final ECIES payload sent as initiator's handshake rHSLen int = 210 // size of the final ECIES payload sent as receiver's handshake ) @@ -157,7 +157,7 @@ func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyS []byte, sessionToken } clogger.Debugf("receiver handshake (sent to %v):\n%v", hexkey(remotePubKeyS), hexkey(response)) } - return self.newSession(initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) + return self.newSession(initiator, initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) } /* @@ -198,7 +198,7 @@ func (self *cryptoId) startHandshake(remotePubKeyS, sessionToken []byte) (auth [ return } - var tokenFlag byte + var tokenFlag byte // = 0x00 if sessionToken == nil { // no session token found means we need to generate shared secret. // ecies shared secret is used as initial session token for new peers @@ -216,7 +216,7 @@ func (self *cryptoId) startHandshake(remotePubKeyS, sessionToken []byte) (auth [ // E(remote-pubk, S(ecdhe-random, token^nonce) || H(ecdhe-random-pubk) || pubk || nonce || 0x1) // allocate msgLen long message, var msg []byte = make([]byte, msgLen) - initNonce = msg[msgLen-keyLen-1 : msgLen-1] + initNonce = msg[msgLen-shaLen-1 : msgLen-1] if _, err = rand.Read(initNonce); err != nil { return } @@ -245,9 +245,9 @@ func (self *cryptoId) startHandshake(remotePubKeyS, sessionToken []byte) (auth [ if randomPubKey64, err = ExportPublicKey(&randomPrvKey.PublicKey); err != nil { return } - copy(msg[sigLen:sigLen+keyLen], crypto.Sha3(randomPubKey64)) + copy(msg[sigLen:sigLen+shaLen], crypto.Sha3(randomPubKey64)) // pubkey copied to the correct segment. - copy(msg[sigLen+keyLen:sigLen+keyLen+pubLen], self.pubKeyS) + copy(msg[sigLen+shaLen:sigLen+shaLen+pubLen], self.pubKeyS) // nonce is already in the slice // stick tokenFlag byte to the end msg[msgLen-1] = tokenFlag @@ -295,7 +295,7 @@ func (self *cryptoId) respondToHandshake(auth, remotePubKeyS, sessionToken []byt } // the initiator nonce is read off the end of the message - initNonce = msg[msgLen-keyLen-1 : msgLen-1] + initNonce = msg[msgLen-shaLen-1 : msgLen-1] // I prove that i own prv key (to derive shared secret, and read nonce off encrypted msg) and that I own shared secret // they prove they own the private key belonging to ecdhe-random-pubk // we can now reconstruct the signed message and recover the peers pubkey @@ -311,8 +311,8 @@ func (self *cryptoId) respondToHandshake(auth, remotePubKeyS, sessionToken []byt // now we find ourselves a long task too, fill it random var resp = make([]byte, resLen) - // generate keyLen long nonce - respNonce = resp[pubLen : pubLen+keyLen] + // generate shaLen long nonce + respNonce = resp[pubLen : pubLen+shaLen] if _, err = rand.Read(respNonce); err != nil { return } @@ -350,7 +350,7 @@ func (self *cryptoId) completeHandshake(auth []byte) (respNonce []byte, remoteRa return } - respNonce = msg[pubLen : pubLen+keyLen] + respNonce = msg[pubLen : pubLen+shaLen] var remoteRandomPubKeyS = msg[:pubLen] if remoteRandomPubKey, err = ImportPublicKey(remoteRandomPubKeyS); err != nil { return @@ -364,7 +364,7 @@ func (self *cryptoId) completeHandshake(auth []byte) (respNonce []byte, remoteRa /* newSession is called after the handshake is completed. The arguments are values negotiated in the handshake and the return value is a new session : a new session Token to be remembered for the next time we connect with this peer. And a MsgReadWriter that implements an encrypted and authenticated connection with key material obtained from the crypto handshake key exchange */ -func (self *cryptoId) newSession(initNonce, respNonce, auth []byte, privKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey) (sessionToken []byte, rw *secretRW, err error) { +func (self *cryptoId) newSession(initiator bool, initNonce, respNonce, auth []byte, privKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey) (sessionToken []byte, rw *secretRW, err error) { // 3) Now we can trust ecdhe-random-pubk to derive new keys //ecdhe-shared-secret = ecdh.agree(ecdhe-random, remote-ecdhe-random-pubk) var dhSharedSecret []byte @@ -382,12 +382,14 @@ func (self *cryptoId) newSession(initNonce, respNonce, auth []byte, privKey *ecd // mac-secret = crypto.Sha3(ecdhe-shared-secret || aes-secret) var macSecret = crypto.Sha3(append(dhSharedSecret, aesSecret...)) // # destroy ecdhe-shared-secret - // egress-mac = crypto.Sha3(mac-secret^nonce || auth) - var egressMac = crypto.Sha3(append(Xor(macSecret, respNonce), auth...)) - // # destroy nonce - // ingress-mac = crypto.Sha3(mac-secret^initiator-nonce || auth), - var ingressMac = crypto.Sha3(append(Xor(macSecret, initNonce), auth...)) - // # destroy remote-nonce + var egressMac, ingressMac []byte + if initiator { + egressMac = Xor(macSecret, respNonce) + ingressMac = Xor(macSecret, initNonce) + } else { + egressMac = Xor(macSecret, initNonce) + ingressMac = Xor(macSecret, respNonce) + } rw = &secretRW{ aesSecret: aesSecret, macSecret: macSecret, diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go index 47b16040ae..919d38df69 100644 --- a/p2p/crypto_test.go +++ b/p2p/crypto_test.go @@ -106,12 +106,12 @@ func TestCryptoHandshake(t *testing.T) { } // now both parties should have the same session parameters - initSessionToken, initSecretRW, err := initiator.newSession(initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) + initSessionToken, initSecretRW, err := initiator.newSession(true, initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) if err != nil { t.Errorf("%v", err) } - recSessionToken, recSecretRW, err := receiver.newSession(remoteInitNonce, remoteRecNonce, auth, remoteRandomPrivKey, remoteInitRandomPubKey) + recSessionToken, recSecretRW, err := receiver.newSession(false, remoteInitNonce, remoteRecNonce, auth, remoteRandomPrivKey, remoteInitRandomPubKey) if err != nil { t.Errorf("%v", err) } @@ -136,11 +136,11 @@ func TestCryptoHandshake(t *testing.T) { if !bytes.Equal(initSecretRW.macSecret, recSecretRW.macSecret) { t.Errorf("macSecrets do not match") } - if !bytes.Equal(initSecretRW.egressMac, recSecretRW.egressMac) { - t.Errorf("egressMacs do not match") + if !bytes.Equal(initSecretRW.egressMac, recSecretRW.ingressMac) { + t.Errorf("initiator's egressMac do not match receiver's ingressMac") } - if !bytes.Equal(initSecretRW.ingressMac, recSecretRW.ingressMac) { - t.Errorf("ingressMacs do not match") + if !bytes.Equal(initSecretRW.ingressMac, recSecretRW.egressMac) { + t.Errorf("initiator's inressMac do not match receiver's egressMac") } } @@ -191,7 +191,7 @@ func TestPeersHandshake(t *testing.T) { <-receiver.cryptoReady close(ready) }() - timeout := time.After(1 * time.Second) + timeout := time.After(10 * time.Second) select { case <-ready: case <-timeout: diff --git a/p2p/peer.go b/p2p/peer.go index 99f1a61d38..62df58f8de 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -343,7 +343,7 @@ func (p *Peer) handleCryptoHandshake() (loop readLoop, err error) { // it is survived by an encrypted readwriter var initiator bool var sessionToken []byte - sessionToken = make([]byte, keyLen) + sessionToken = make([]byte, shaLen) if _, err = rand.Read(sessionToken); err != nil { return } From 68205dec9ff8ab7d16c61f5e32b104d7aa20b352 Mon Sep 17 00:00:00 2001 From: zelig Date: Mon, 26 Jan 2015 16:16:23 +0000 Subject: [PATCH 22/54] make crypto handshake calls package level, store privateKey on peer + tests ok --- p2p/crypto.go | 87 ++++++++++++---------------------------------- p2p/crypto_test.go | 25 ++++++------- p2p/peer.go | 27 +++++++++----- 3 files changed, 52 insertions(+), 87 deletions(-) diff --git a/p2p/crypto.go b/p2p/crypto.go index 3610127438..6a2b99e937 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -32,47 +32,6 @@ type secretRW struct { aesSecret, macSecret, egressMac, ingressMac []byte } -/* -cryptoId implements the crypto layer for the p2p networking -It is initialised on the node's own identity (which has access to the node's private key) and run separately on a peer connection to set up a secure session after a crypto handshake -After it performs a crypto handshake it returns -*/ -type cryptoId struct { - prvKey *ecdsa.PrivateKey - pubKey *ecdsa.PublicKey - pubKeyS []byte -} - -/* -newCryptoId(id ClientIdentity) initialises a crypto layer manager. This object has a short lifecycle when the peer connection starts. It is survived by a secretRW (an message read writer with encryption and authentication) if the crypto handshake is successful. -*/ -func newCryptoId(id ClientIdentity) (self *cryptoId, err error) { - // will be at server init - var prvKeyS []byte = id.PrivKey() - if prvKeyS == nil { - err = fmt.Errorf("no private key for client") - return - } - // initialise ecies private key via importing keys (known via our own clientIdentity) - // the key format is what elliptic package is using: elliptic.Marshal(Curve, X, Y) - var prvKey = crypto.ToECDSA(prvKeyS) - if prvKey == nil { - err = fmt.Errorf("invalid private key for client") - return - } - self = &cryptoId{ - prvKey: prvKey, - // initialise public key from the imported private key - pubKey: &prvKey.PublicKey, - // to be created at server init shared between peers and sessions - // for reuse, call wth ReadAt, no reset seek needed - } - self.pubKeyS = id.Pubkey()[1:] - clogger.Debugf("initialise crypto for NodeId %v", hexkey(self.pubKeyS)) - clogger.Debugf("private-key %v\npublic key %v", hexkey(prvKeyS), hexkey(self.pubKeyS)) - return -} - type hexkey []byte func (self hexkey) String() string { @@ -80,27 +39,29 @@ func (self hexkey) String() string { } /* -Run(connection, remotePublicKey, sessionToken) is called when the peer connection starts to set up a secure session by performing a crypto handshake. +NewSecureSession(connection, privateKey, remotePublicKey, sessionToken, initiator) is called when the peer connection starts to set up a secure session by performing a crypto handshake. connection is (a buffered) network connection. - remotePublicKey is the remote peer's node Id. + privateKey is the local client's private key (*ecdsa.PrivateKey) + + remotePublicKey is the remote peer's node Id ([]byte) sessionToken is the token from the previous session with this same peer. Nil if no token is found. - initiator is a boolean flag. True if the node represented by cryptoId is the initiator of the connection (ie., remote is an outbound peer reached by dialing out). False if the connection was established by accepting a call from the remote peer via a listener. + initiator is a boolean flag. True if the node is the initiator of the connection (ie., remote is an outbound peer reached by dialing out). False if the connection was established by accepting a call from the remote peer via a listener. It returns a secretRW which implements the MsgReadWriter interface. */ -func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyS []byte, sessionToken []byte, initiator bool) (token []byte, rw *secretRW, err error) { +func NewSecureSession(conn io.ReadWriter, prvKey *ecdsa.PrivateKey, remotePubKeyS []byte, sessionToken []byte, initiator bool) (token []byte, rw *secretRW, err error) { var auth, initNonce, recNonce []byte var read int var randomPrivKey *ecdsa.PrivateKey var remoteRandomPubKey *ecdsa.PublicKey clogger.Debugf("attempting session with %v", hexkey(remotePubKeyS)) if initiator { - if auth, initNonce, randomPrivKey, _, err = self.startHandshake(remotePubKeyS, sessionToken); err != nil { + if auth, initNonce, randomPrivKey, _, err = startHandshake(prvKey, remotePubKeyS, sessionToken); err != nil { return } if sessionToken != nil { @@ -125,7 +86,7 @@ func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyS []byte, sessionToken } // write out auth message // wait for response, then call complete - if recNonce, remoteRandomPubKey, _, err = self.completeHandshake(response); err != nil { + if recNonce, remoteRandomPubKey, _, err = completeHandshake(response, prvKey); err != nil { return } clogger.Debugf("receiver-nonce: %v", hexkey(recNonce)) @@ -147,7 +108,7 @@ func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyS []byte, sessionToken // Extract info from the authentication. The initiator starts by sending us a handshake that we need to respond to. // so we read auth message first, then respond var response []byte - if response, recNonce, initNonce, randomPrivKey, remoteRandomPubKey, err = self.respondToHandshake(auth, remotePubKeyS, sessionToken); err != nil { + if response, recNonce, initNonce, randomPrivKey, remoteRandomPubKey, err = respondToHandshake(auth, prvKey, remotePubKeyS, sessionToken); err != nil { return } clogger.Debugf("receiver-nonce: %v", hexkey(recNonce)) @@ -157,7 +118,7 @@ func (self *cryptoId) Run(conn io.ReadWriter, remotePubKeyS []byte, sessionToken } clogger.Debugf("receiver handshake (sent to %v):\n%v", hexkey(remotePubKeyS), hexkey(response)) } - return self.newSession(initiator, initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) + return newSession(initiator, initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) } /* @@ -192,7 +153,7 @@ The caller provides the public key of the peer as conjuctured from lookup based The first return value is the auth message that is to be sent out to the remote receiver. */ -func (self *cryptoId) startHandshake(remotePubKeyS, sessionToken []byte) (auth []byte, initNonce []byte, randomPrvKey *ecdsa.PrivateKey, remotePubKey *ecdsa.PublicKey, err error) { +func startHandshake(prvKey *ecdsa.PrivateKey, remotePubKeyS, sessionToken []byte) (auth []byte, initNonce []byte, randomPrvKey *ecdsa.PrivateKey, remotePubKey *ecdsa.PublicKey, err error) { // session init, common to both parties if remotePubKey, err = ImportPublicKey(remotePubKeyS); err != nil { return @@ -203,7 +164,7 @@ func (self *cryptoId) startHandshake(remotePubKeyS, sessionToken []byte) (auth [ // no session token found means we need to generate shared secret. // ecies shared secret is used as initial session token for new peers // generate shared key from prv and remote pubkey - if sessionToken, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remotePubKey), sskLen, sskLen); err != nil { + if sessionToken, err = ecies.ImportECDSA(prvKey).GenerateShared(ecies.ImportECDSAPublic(remotePubKey), sskLen, sskLen); err != nil { return } // tokenFlag = 0x00 // redundant @@ -245,9 +206,13 @@ func (self *cryptoId) startHandshake(remotePubKeyS, sessionToken []byte) (auth [ if randomPubKey64, err = ExportPublicKey(&randomPrvKey.PublicKey); err != nil { return } + var pubKey64 []byte + if pubKey64, err = ExportPublicKey(&prvKey.PublicKey); err != nil { + return + } copy(msg[sigLen:sigLen+shaLen], crypto.Sha3(randomPubKey64)) // pubkey copied to the correct segment. - copy(msg[sigLen+shaLen:sigLen+shaLen+pubLen], self.pubKeyS) + copy(msg[sigLen+shaLen:sigLen+shaLen+pubLen], pubKey64) // nonce is already in the slice // stick tokenFlag byte to the end msg[msgLen-1] = tokenFlag @@ -267,7 +232,7 @@ respondToHandshake is called by peer if it accepted (but not initiated) the conn The first return value is the authentication response (aka receiver handshake) that is to be sent to the remote initiator. */ -func (self *cryptoId) respondToHandshake(auth, remotePubKeyS, sessionToken []byte) (authResp []byte, respNonce []byte, initNonce []byte, randomPrivKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey, err error) { +func respondToHandshake(auth []byte, prvKey *ecdsa.PrivateKey, remotePubKeyS, sessionToken []byte) (authResp []byte, respNonce []byte, initNonce []byte, randomPrivKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey, err error) { var msg []byte var remotePubKey *ecdsa.PublicKey if remotePubKey, err = ImportPublicKey(remotePubKeyS); err != nil { @@ -276,7 +241,7 @@ func (self *cryptoId) respondToHandshake(auth, remotePubKeyS, sessionToken []byt // they prove that msg is meant for me, // I prove I possess private key if i can read it - if msg, err = crypto.Decrypt(self.prvKey, auth); err != nil { + if msg, err = crypto.Decrypt(prvKey, auth); err != nil { return } @@ -285,7 +250,7 @@ func (self *cryptoId) respondToHandshake(auth, remotePubKeyS, sessionToken []byt // no session token found means we need to generate shared secret. // ecies shared secret is used as initial session token for new peers // generate shared key from prv and remote pubkey - if sessionToken, err = ecies.ImportECDSA(self.prvKey).GenerateShared(ecies.ImportECDSAPublic(remotePubKey), sskLen, sskLen); err != nil { + if sessionToken, err = ecies.ImportECDSA(prvKey).GenerateShared(ecies.ImportECDSAPublic(remotePubKey), sskLen, sskLen); err != nil { return } // tokenFlag = 0x00 // redundant @@ -342,11 +307,11 @@ func (self *cryptoId) respondToHandshake(auth, remotePubKeyS, sessionToken []byt /* completeHandshake is called when the initiator receives an authentication response (aka receiver handshake). It completes the handshake by reading off parameters the remote peer provides needed to set up the secure session */ -func (self *cryptoId) completeHandshake(auth []byte) (respNonce []byte, remoteRandomPubKey *ecdsa.PublicKey, tokenFlag bool, err error) { +func completeHandshake(auth []byte, prvKey *ecdsa.PrivateKey) (respNonce []byte, remoteRandomPubKey *ecdsa.PublicKey, tokenFlag bool, err error) { var msg []byte // they prove that msg is meant for me, // I prove I possess private key if i can read it - if msg, err = crypto.Decrypt(self.prvKey, auth); err != nil { + if msg, err = crypto.Decrypt(prvKey, auth); err != nil { return } @@ -364,7 +329,7 @@ func (self *cryptoId) completeHandshake(auth []byte) (respNonce []byte, remoteRa /* newSession is called after the handshake is completed. The arguments are values negotiated in the handshake and the return value is a new session : a new session Token to be remembered for the next time we connect with this peer. And a MsgReadWriter that implements an encrypted and authenticated connection with key material obtained from the crypto handshake key exchange */ -func (self *cryptoId) newSession(initiator bool, initNonce, respNonce, auth []byte, privKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey) (sessionToken []byte, rw *secretRW, err error) { +func newSession(initiator bool, initNonce, respNonce, auth []byte, privKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey) (sessionToken []byte, rw *secretRW, err error) { // 3) Now we can trust ecdhe-random-pubk to derive new keys //ecdhe-shared-secret = ecdh.agree(ecdhe-random, remote-ecdhe-random-pubk) var dhSharedSecret []byte @@ -372,16 +337,10 @@ func (self *cryptoId) newSession(initiator bool, initNonce, respNonce, auth []by if dhSharedSecret, err = ecies.ImportECDSA(privKey).GenerateShared(pubKey, sskLen, sskLen); err != nil { return } - // shared-secret = crypto.Sha3(ecdhe-shared-secret || crypto.Sha3(nonce || initiator-nonce)) var sharedSecret = crypto.Sha3(append(dhSharedSecret, crypto.Sha3(append(respNonce, initNonce...))...)) - // token = crypto.Sha3(shared-secret) sessionToken = crypto.Sha3(sharedSecret) - // aes-secret = crypto.Sha3(ecdhe-shared-secret || shared-secret) var aesSecret = crypto.Sha3(append(dhSharedSecret, sharedSecret...)) - // # destroy shared-secret - // mac-secret = crypto.Sha3(ecdhe-shared-secret || aes-secret) var macSecret = crypto.Sha3(append(dhSharedSecret, aesSecret...)) - // # destroy ecdhe-shared-secret var egressMac, ingressMac []byte if initiator { egressMac = Xor(macSecret, respNonce) diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go index 919d38df69..f55588ce2b 100644 --- a/p2p/crypto_test.go +++ b/p2p/crypto_test.go @@ -78,40 +78,35 @@ func TestCryptoHandshake(t *testing.T) { prv1, _ := crypto.GenerateKey() pub1 := &prv1.PublicKey - var initiator, receiver *cryptoId - if initiator, err = newCryptoId(&peerId{crypto.FromECDSA(prv0), crypto.FromECDSAPub(pub0)}); err != nil { - return - } - if receiver, err = newCryptoId(&peerId{crypto.FromECDSA(prv1), crypto.FromECDSAPub(pub1)}); err != nil { - return - } + pub0s := crypto.FromECDSAPub(pub0) + pub1s := crypto.FromECDSAPub(pub1) // simulate handshake by feeding output to input // initiator sends handshake 'auth' - auth, initNonce, randomPrivKey, _, err := initiator.startHandshake(receiver.pubKeyS, sessionToken) + auth, initNonce, randomPrivKey, _, err := startHandshake(prv0, pub1s, sessionToken) if err != nil { t.Errorf("%v", err) } // receiver reads auth and responds with response - response, remoteRecNonce, remoteInitNonce, remoteRandomPrivKey, remoteInitRandomPubKey, err := receiver.respondToHandshake(auth, crypto.FromECDSAPub(pub0), sessionToken) + response, remoteRecNonce, remoteInitNonce, remoteRandomPrivKey, remoteInitRandomPubKey, err := respondToHandshake(auth, prv1, pub0s, sessionToken) if err != nil { t.Errorf("%v", err) } // initiator reads receiver's response and the key exchange completes - recNonce, remoteRandomPubKey, _, err := initiator.completeHandshake(response) + recNonce, remoteRandomPubKey, _, err := completeHandshake(response, prv0) if err != nil { t.Errorf("%v", err) } // now both parties should have the same session parameters - initSessionToken, initSecretRW, err := initiator.newSession(true, initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) + initSessionToken, initSecretRW, err := newSession(true, initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) if err != nil { t.Errorf("%v", err) } - recSessionToken, recSecretRW, err := receiver.newSession(false, remoteInitNonce, remoteRecNonce, auth, remoteRandomPrivKey, remoteInitRandomPubKey) + recSessionToken, recSecretRW, err := newSession(false, remoteInitNonce, remoteRecNonce, auth, remoteRandomPrivKey, remoteInitRandomPubKey) if err != nil { t.Errorf("%v", err) } @@ -163,12 +158,12 @@ func TestPeersHandshake(t *testing.T) { initiator := newPeer(conn1, []Protocol{}, nil) receiver := newPeer(conn2, []Protocol{}, nil) initiator.dialAddr = &peerAddr{IP: net.ParseIP("1.2.3.4"), Port: 2222, Pubkey: pub1s[1:]} - initiator.ourID = &peerId{prv0s, pub0s} + initiator.privateKey = prv0s // this is cheating. identity of initiator/dialler not available to listener/receiver // its public key should be looked up based on IP address - receiver.identity = initiator.ourID - receiver.ourID = &peerId{prv1s, pub1s} + receiver.identity = &peerId{nil, pub0s} + receiver.privateKey = prv1s initiator.pubkeyHook = func(*peerAddr) error { return nil } receiver.pubkeyHook = func(*peerAddr) error { return nil } diff --git a/p2p/peer.go b/p2p/peer.go index 62df58f8de..e82bca222b 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -3,6 +3,7 @@ package p2p import ( "bufio" "bytes" + "crypto/ecdsa" "crypto/rand" "fmt" "io" @@ -12,6 +13,8 @@ import ( "sync" "time" + "github.com/ethereum/go-ethereum/crypto" + "github.com/ethereum/go-ethereum/event" "github.com/ethereum/go-ethereum/logger" ) @@ -73,6 +76,7 @@ type Peer struct { runBaseProtocol bool // for testing cryptoHandshake bool // for testing cryptoReady chan struct{} + privateKey []byte runlock sync.RWMutex // protects running running map[string]*proto @@ -338,6 +342,13 @@ func (p *Peer) dispatch(msg Msg, protoDone chan struct{}) (wait bool, err error) type readLoop func(chan<- Msg, chan<- error, <-chan bool) +func (p *Peer) PrivateKey() (prv *ecdsa.PrivateKey, err error) { + if prv = crypto.ToECDSA(p.privateKey); prv == nil { + err = fmt.Errorf("invalid private key") + } + return +} + func (p *Peer) handleCryptoHandshake() (loop readLoop, err error) { // cryptoId is just created for the lifecycle of the handshake // it is survived by an encrypted readwriter @@ -350,17 +361,17 @@ func (p *Peer) handleCryptoHandshake() (loop readLoop, err error) { if p.dialAddr != nil { // this should have its own method Outgoing() bool initiator = true } - // create crypto layer - // this could in principle run only once but maybe we want to allow - // identity switching - var crypto *cryptoId - if crypto, err = newCryptoId(p.ourID); err != nil { - return - } + // run on peer // this bit handles the handshake and creates a secure communications channel with // var rw *secretRW - if sessionToken, _, err = crypto.Run(p.conn, p.Pubkey(), sessionToken, initiator); err != nil { + var prvKey *ecdsa.PrivateKey + if prvKey, err = p.PrivateKey(); err != nil { + err = fmt.Errorf("unable to access private key for client: %v", err) + return + } + // initialise a new secure session + if sessionToken, _, err = NewSecureSession(p.conn, prvKey, p.Pubkey(), sessionToken, initiator); err != nil { p.Debugf("unable to setup secure session: %v", err) return } From 71765957e4442105647045a14a0a551459daddfd Mon Sep 17 00:00:00 2001 From: zelig Date: Mon, 26 Jan 2015 16:58:58 +0000 Subject: [PATCH 23/54] get rid of Private Key in ClientIdentity --- p2p/client_identity.go | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/p2p/client_identity.go b/p2p/client_identity.go index fca2756bd6..ef01f1ad78 100644 --- a/p2p/client_identity.go +++ b/p2p/client_identity.go @@ -7,9 +7,8 @@ import ( // ClientIdentity represents the identity of a peer. type ClientIdentity interface { - String() string // human readable identity - Pubkey() []byte // 512-bit public key - PrivKey() []byte // 512-bit private key + String() string // human readable identity + Pubkey() []byte // 512-bit public key } type SimpleClientIdentity struct { @@ -22,7 +21,7 @@ type SimpleClientIdentity struct { pubkey []byte } -func NewSimpleClientIdentity(clientIdentifier string, version string, customIdentifier string, privkey []byte, pubkey []byte) *SimpleClientIdentity { +func NewSimpleClientIdentity(clientIdentifier string, version string, customIdentifier string, pubkey []byte) *SimpleClientIdentity { clientIdentity := &SimpleClientIdentity{ clientIdentifier: clientIdentifier, version: version, @@ -30,7 +29,6 @@ func NewSimpleClientIdentity(clientIdentifier string, version string, customIden os: runtime.GOOS, implementation: runtime.Version(), pubkey: pubkey, - privkey: privkey, } return clientIdentity From 488a04273639694399929b28c50eadf1bb34405b Mon Sep 17 00:00:00 2001 From: zelig Date: Thu, 29 Jan 2015 01:49:50 +0000 Subject: [PATCH 24/54] fix clientidentity test after privkey removed --- p2p/client_identity_test.go | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/p2p/client_identity_test.go b/p2p/client_identity_test.go index 61c34fbf11..7b62f05ef0 100644 --- a/p2p/client_identity_test.go +++ b/p2p/client_identity_test.go @@ -8,12 +8,8 @@ import ( ) func TestClientIdentity(t *testing.T) { - clientIdentity := NewSimpleClientIdentity("Ethereum(G)", "0.5.16", "test", []byte("privkey"), []byte("pubkey")) - key := clientIdentity.Privkey() - if !bytes.Equal(key, []byte("privkey")) { - t.Errorf("Expected Privkey to be %x, got %x", key, []byte("privkey")) - } - key = clientIdentity.Pubkey() + clientIdentity := NewSimpleClientIdentity("Ethereum(G)", "0.5.16", "test", []byte("pubkey")) + key := clientIdentity.Pubkey() if !bytes.Equal(key, []byte("pubkey")) { t.Errorf("Expected Pubkey to be %x, got %x", key, []byte("pubkey")) } From 2e48d39fc7fc9b8d65e9b6e0ce6863b9374f2233 Mon Sep 17 00:00:00 2001 From: zelig Date: Thu, 29 Jan 2015 03:16:10 +0000 Subject: [PATCH 25/54] key generation abstracted out, for testing with deterministic keys --- p2p/crypto.go | 41 ++++++++++++++++++++++++++---- p2p/crypto_test.go | 63 ++++++++++++++++++++++++++++++++++++++++------ 2 files changed, 92 insertions(+), 12 deletions(-) diff --git a/p2p/crypto.go b/p2p/crypto.go index 6a2b99e937..cb0534cba0 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -1,6 +1,7 @@ package p2p import ( + // "binary" "crypto/ecdsa" "crypto/rand" "fmt" @@ -38,6 +39,33 @@ func (self hexkey) String() string { return fmt.Sprintf("(%d) %x", len(self), []byte(self)) } +var nonceF = func(b []byte) (n int, err error) { + return rand.Read(b) +} + +var step = 0 +var detnonceF = func(b []byte) (n int, err error) { + step++ + copy(b, crypto.Sha3([]byte("privacy"+string(step)))) + fmt.Printf("detkey %v: %v\n", step, hexkey(b)) + return +} + +var keyF = func() (priv *ecdsa.PrivateKey, err error) { + priv, err = ecdsa.GenerateKey(crypto.S256(), rand.Reader) + if err != nil { + return + } + return +} + +var detkeyF = func() (priv *ecdsa.PrivateKey, err error) { + s := make([]byte, 32) + detnonceF(s) + priv = crypto.ToECDSA(s) + return +} + /* NewSecureSession(connection, privateKey, remotePublicKey, sessionToken, initiator) is called when the peer connection starts to set up a secure session by performing a crypto handshake. @@ -53,7 +81,6 @@ NewSecureSession(connection, privateKey, remotePublicKey, sessionToken, initiato It returns a secretRW which implements the MsgReadWriter interface. */ - func NewSecureSession(conn io.ReadWriter, prvKey *ecdsa.PrivateKey, remotePubKeyS []byte, sessionToken []byte, initiator bool) (token []byte, rw *secretRW, err error) { var auth, initNonce, recNonce []byte var read int @@ -178,7 +205,8 @@ func startHandshake(prvKey *ecdsa.PrivateKey, remotePubKeyS, sessionToken []byte // allocate msgLen long message, var msg []byte = make([]byte, msgLen) initNonce = msg[msgLen-shaLen-1 : msgLen-1] - if _, err = rand.Read(initNonce); err != nil { + fmt.Printf("init-nonce: ") + if _, err = nonceF(initNonce); err != nil { return } // create known message @@ -187,7 +215,8 @@ func startHandshake(prvKey *ecdsa.PrivateKey, remotePubKeyS, sessionToken []byte var sharedSecret = Xor(sessionToken, initNonce) // generate random keypair to use for signing - if randomPrvKey, err = crypto.GenerateKey(); err != nil { + fmt.Printf("init-random-ecdhe-private-key: ") + if randomPrvKey, err = keyF(); err != nil { return } // sign shared secret (message known to both parties): shared-secret @@ -278,11 +307,13 @@ func respondToHandshake(auth []byte, prvKey *ecdsa.PrivateKey, remotePubKeyS, se var resp = make([]byte, resLen) // generate shaLen long nonce respNonce = resp[pubLen : pubLen+shaLen] - if _, err = rand.Read(respNonce); err != nil { + fmt.Printf("rec-nonce: ") + if _, err = nonceF(respNonce); err != nil { return } // generate random keypair for session - if randomPrivKey, err = crypto.GenerateKey(); err != nil { + fmt.Printf("rec-random-ecdhe-private-key: ") + if randomPrivKey, err = keyF(); err != nil { return } // responder auth message diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go index f55588ce2b..a4bf14ba64 100644 --- a/p2p/crypto_test.go +++ b/p2p/crypto_test.go @@ -2,9 +2,7 @@ package p2p import ( "bytes" - // "crypto/ecdsa" - // "crypto/elliptic" - // "crypto/rand" + "crypto/ecdsa" "fmt" "net" "testing" @@ -71,11 +69,60 @@ func TestSharedSecret(t *testing.T) { } func TestCryptoHandshake(t *testing.T) { + testCryptoHandshakeWithGen(false, t) +} + +func TestTokenCryptoHandshake(t *testing.T) { + testCryptoHandshakeWithGen(true, t) +} + +func TestDetCryptoHandshake(t *testing.T) { + defer testlog(t).detach() + tmpkeyF := keyF + keyF = detkeyF + tmpnonceF := nonceF + nonceF = detnonceF + testCryptoHandshakeWithGen(false, t) + keyF = tmpkeyF + nonceF = tmpnonceF +} + +func TestDetTokenCryptoHandshake(t *testing.T) { + defer testlog(t).detach() + tmpkeyF := keyF + keyF = detkeyF + tmpnonceF := nonceF + nonceF = detnonceF + testCryptoHandshakeWithGen(true, t) + keyF = tmpkeyF + nonceF = tmpnonceF +} + +func testCryptoHandshakeWithGen(token bool, t *testing.T) { + fmt.Printf("init-private-key: ") + prv0, err := keyF() + if err != nil { + t.Errorf("%v", err) + return + } + fmt.Printf("rec-private-key: ") + prv1, err := keyF() + if err != nil { + t.Errorf("%v", err) + return + } + var nonce []byte + if token { + fmt.Printf("session-token: ") + nonce = make([]byte, shaLen) + nonceF(nonce) + } + testCryptoHandshake(prv0, prv1, nonce, t) +} + +func testCryptoHandshake(prv0, prv1 *ecdsa.PrivateKey, sessionToken []byte, t *testing.T) { var err error - var sessionToken []byte - prv0, _ := crypto.GenerateKey() // = ecdsa.GenerateKey(crypto.S256(), rand.Reader) pub0 := &prv0.PublicKey - prv1, _ := crypto.GenerateKey() pub1 := &prv1.PublicKey pub0s := crypto.FromECDSAPub(pub0) @@ -87,12 +134,14 @@ func TestCryptoHandshake(t *testing.T) { if err != nil { t.Errorf("%v", err) } + fmt.Printf("-> %v\n", hexkey(auth)) // receiver reads auth and responds with response response, remoteRecNonce, remoteInitNonce, remoteRandomPrivKey, remoteInitRandomPubKey, err := respondToHandshake(auth, prv1, pub0s, sessionToken) if err != nil { t.Errorf("%v", err) } + fmt.Printf("<- %v\n", hexkey(response)) // initiator reads receiver's response and the key exchange completes recNonce, remoteRandomPubKey, _, err := completeHandshake(response, prv0) @@ -111,7 +160,7 @@ func TestCryptoHandshake(t *testing.T) { t.Errorf("%v", err) } - fmt.Printf("\nauth (%v) %x\n\nresp (%v) %x\n\n", len(auth), auth, len(response), response) + // fmt.Printf("\nauth (%v) %x\n\nresp (%v) %x\n\n", len(auth), auth, len(response), response) // fmt.Printf("\nauth %x\ninitNonce %x\nresponse%x\nremoteRecNonce %x\nremoteInitNonce %x\nremoteRandomPubKey %x\nrecNonce %x\nremoteInitRandomPubKey %x\ninitSessionToken %x\n\n", auth, initNonce, response, remoteRecNonce, remoteInitNonce, remoteRandomPubKey, recNonce, remoteInitRandomPubKey, initSessionToken) From 410b35e9135baa86e92bc07e0ef85d04e3ac0561 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Tue, 27 Jan 2015 14:29:33 +0100 Subject: [PATCH 26/54] crypto: make it easier to run Sha3 on multiple inputs crypto.Sha3(append(foo, bar)) --> crypto.Sha3(foo, bar) crypto.Sha3([]byte{}) --> crypto.Sha3() --- crypto/crypto.go | 7 ++++--- crypto/crypto_test.go | 2 +- 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/crypto/crypto.go b/crypto/crypto.go index d56b9112f7..42e6036b5e 100644 --- a/crypto/crypto.go +++ b/crypto/crypto.go @@ -27,10 +27,11 @@ func init() { ecies.AddParamsForCurve(S256(), ecies.ECIES_AES128_SHA256) } -func Sha3(data []byte) []byte { +func Sha3(data ...[]byte) []byte { d := sha3.NewKeccak256() - d.Write(data) - + for _, b := range data { + d.Write(b) + } return d.Sum(nil) } diff --git a/crypto/crypto_test.go b/crypto/crypto_test.go index 441733f93c..c688566227 100644 --- a/crypto/crypto_test.go +++ b/crypto/crypto_test.go @@ -18,7 +18,7 @@ import ( func TestSha3(t *testing.T) { msg := []byte("abc") exp, _ := hex.DecodeString("4e03657aea45a94fc7d47ba826c8d667c0d1e6e33a64a036ec44f58fa12d6c45") - checkhash(t, "Sha3-256", Sha3, msg, exp) + checkhash(t, "Sha3-256", func(in []byte) []byte { return Sha3(in) }, msg, exp) } func TestSha256(t *testing.T) { From 8c3095faf03fb6c8138e6b8691df49be4a6fffae Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Fri, 30 Jan 2015 16:52:48 +0100 Subject: [PATCH 27/54] rlp: fix encoding of arrays with byte element type --- rlp/encode.go | 22 +++++++++++++++++++++- rlp/encode_test.go | 6 ++++++ 2 files changed, 27 insertions(+), 1 deletion(-) diff --git a/rlp/encode.go b/rlp/encode.go index d80b66315d..b453b5bf4f 100644 --- a/rlp/encode.go +++ b/rlp/encode.go @@ -301,8 +301,10 @@ func makeWriter(typ reflect.Type) (writer, error) { return writeUint, nil case kind == reflect.String: return writeString, nil - case kind == reflect.Slice && typ.Elem().Kind() == reflect.Uint8 && !typ.Elem().Implements(encoderInterface): + case kind == reflect.Slice && isByte(typ.Elem()): return writeBytes, nil + case kind == reflect.Array && isByte(typ.Elem()): + return writeByteArray, nil case kind == reflect.Slice || kind == reflect.Array: return makeSliceWriter(typ) case kind == reflect.Struct: @@ -314,6 +316,10 @@ func makeWriter(typ reflect.Type) (writer, error) { } } +func isByte(typ reflect.Type) bool { + return typ.Kind() == reflect.Uint8 && !typ.Implements(encoderInterface) +} + func writeUint(val reflect.Value, w *encbuf) error { i := val.Uint() if i == 0 { @@ -358,6 +364,20 @@ func writeBytes(val reflect.Value, w *encbuf) error { return nil } +func writeByteArray(val reflect.Value, w *encbuf) error { + if !val.CanAddr() { + // Slice requires the value to be addressable. + // Make it addressable by copying. + copy := reflect.New(val.Type()).Elem() + copy.Set(val) + val = copy + } + size := val.Len() + slice := val.Slice(0, size).Bytes() + w.encodeString(slice) + return nil +} + func writeString(val reflect.Value, w *encbuf) error { s := val.String() w.encodeStringHeader(len(s)) diff --git a/rlp/encode_test.go b/rlp/encode_test.go index 18b8437370..0309b92582 100644 --- a/rlp/encode_test.go +++ b/rlp/encode_test.go @@ -40,6 +40,8 @@ func (e *encodableReader) Read(b []byte) (int, error) { panic("called") } +type namedByteType byte + var ( _ = Encoder(&testEncoder{}) _ = Encoder(byteEncoder(0)) @@ -102,6 +104,10 @@ var encTests = []encTest{ // byte slices, strings {val: []byte{}, output: "80"}, {val: []byte{1, 2, 3}, output: "83010203"}, + + {val: []namedByteType{1, 2, 3}, output: "83010203"}, + {val: [...]namedByteType{1, 2, 3}, output: "83010203"}, + {val: "", output: "80"}, {val: "dog", output: "83646F67"}, { From 12224c7f5924720767d73f06ed4571dc3ce2f092 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Tue, 27 Jan 2015 14:33:26 +0100 Subject: [PATCH 28/54] p2p/discover: new package implementing the Node Discovery Protocol --- p2p/discover/table.go | 447 +++++++++++++++++++++++++++++++++++++ p2p/discover/table_test.go | 403 +++++++++++++++++++++++++++++++++ p2p/discover/udp.go | 422 ++++++++++++++++++++++++++++++++++ p2p/discover/udp_test.go | 156 +++++++++++++ 4 files changed, 1428 insertions(+) create mode 100644 p2p/discover/table.go create mode 100644 p2p/discover/table_test.go create mode 100644 p2p/discover/udp.go create mode 100644 p2p/discover/udp_test.go diff --git a/p2p/discover/table.go b/p2p/discover/table.go new file mode 100644 index 0000000000..26526330be --- /dev/null +++ b/p2p/discover/table.go @@ -0,0 +1,447 @@ +// Package discover implements the Node Discovery Protocol. +// +// The Node Discovery protocol provides a way to find RLPx nodes that +// can be connected to. It uses a Kademlia-like protocol to maintain a +// distributed database of the IDs and endpoints of all listening +// nodes. +package discover + +import ( + "crypto/ecdsa" + "crypto/elliptic" + "encoding/hex" + "fmt" + "io" + "math/rand" + "net" + "sort" + "strings" + "sync" + "time" + + "github.com/ethereum/go-ethereum/crypto/secp256k1" + "github.com/ethereum/go-ethereum/rlp" +) + +const ( + alpha = 3 // Kademlia concurrency factor + bucketSize = 16 // Kademlia bucket size + nBuckets = len(NodeID{})*8 + 1 // Number of buckets +) + +type Table struct { + mutex sync.Mutex // protects buckets, their content, and nursery + buckets [nBuckets]*bucket // index of known nodes by distance + nursery []*Node // bootstrap nodes + + net transport + self *Node // metadata of the local node +} + +// transport is implemented by the UDP transport. +// it is an interface so we can test without opening lots of UDP +// sockets and without generating a private key. +type transport interface { + ping(*Node) error + findnode(e *Node, target NodeID) ([]*Node, error) + close() +} + +// bucket contains nodes, ordered by their last activity. +type bucket struct { + lastLookup time.Time + entries []*Node +} + +// Node represents node metadata that is stored in the table. +type Node struct { + Addr *net.UDPAddr + ID NodeID + + active time.Time +} + +type rpcNode struct { + IP string + Port uint16 + ID NodeID +} + +func (n Node) EncodeRLP(w io.Writer) error { + return rlp.Encode(w, rpcNode{IP: n.Addr.IP.String(), Port: uint16(n.Addr.Port), ID: n.ID}) +} +func (n *Node) DecodeRLP(s *rlp.Stream) (err error) { + var ext rpcNode + if err = s.Decode(&ext); err == nil { + n.Addr = &net.UDPAddr{IP: net.ParseIP(ext.IP), Port: int(ext.Port)} + n.ID = ext.ID + } + return err +} + +func newTable(t transport, ourID NodeID, ourAddr *net.UDPAddr) *Table { + tab := &Table{net: t, self: &Node{ID: ourID, Addr: ourAddr}} + for i := range tab.buckets { + tab.buckets[i] = &bucket{} + } + return tab +} + +// Bootstrap sets the bootstrap nodes. These nodes are used to connect +// to the network if the table is empty. Bootstrap will also attempt to +// fill the table by performing random lookup operations on the +// network. +func (tab *Table) Bootstrap(nodes []Node) { + tab.mutex.Lock() + // TODO: maybe filter nodes with bad fields (nil, etc.) to avoid strange crashes + tab.nursery = make([]*Node, 0, len(nodes)) + for _, n := range nodes { + cpy := n + tab.nursery = append(tab.nursery, &cpy) + } + tab.mutex.Unlock() + tab.refresh() +} + +// Lookup performs a network search for nodes close +// to the given target. It approaches the target by querying +// nodes that are closer to it on each iteration. +func (tab *Table) Lookup(target NodeID) []*Node { + var ( + asked = make(map[NodeID]bool) + seen = make(map[NodeID]bool) + reply = make(chan []*Node, alpha) + pendingQueries = 0 + ) + // don't query further if we hit the target. + // unlikely to happen often in practice. + asked[target] = true + + tab.mutex.Lock() + // update last lookup stamp (for refresh logic) + tab.buckets[logdist(tab.self.ID, target)].lastLookup = time.Now() + // generate initial result set + result := tab.closest(target, bucketSize) + tab.mutex.Unlock() + + for { + // ask the closest nodes that we haven't asked yet + for i := 0; i < len(result.entries) && pendingQueries < alpha; i++ { + n := result.entries[i] + if !asked[n.ID] { + asked[n.ID] = true + pendingQueries++ + go func() { + result, _ := tab.net.findnode(n, target) + reply <- result + }() + } + } + if pendingQueries == 0 { + // we have asked all closest nodes, stop the search + break + } + + // wait for the next reply + for _, n := range <-reply { + cn := n + if !seen[n.ID] { + seen[n.ID] = true + result.push(cn, bucketSize) + } + } + pendingQueries-- + } + return result.entries +} + +// refresh performs a lookup for a random target to keep buckets full. +func (tab *Table) refresh() { + ld := -1 // logdist of chosen bucket + tab.mutex.Lock() + for i, b := range tab.buckets { + if i > 0 && b.lastLookup.Before(time.Now().Add(-1*time.Hour)) { + ld = i + break + } + } + tab.mutex.Unlock() + + result := tab.Lookup(randomID(tab.self.ID, ld)) + if len(result) == 0 { + // bootstrap the table with a self lookup + tab.mutex.Lock() + tab.add(tab.nursery) + tab.mutex.Unlock() + tab.Lookup(tab.self.ID) + // TODO: the Kademlia paper says that we're supposed to perform + // random lookups in all buckets further away than our closest neighbor. + } +} + +// closest returns the n nodes in the table that are closest to the +// given id. The caller must hold tab.mutex. +func (tab *Table) closest(target NodeID, nresults int) *nodesByDistance { + // This is a very wasteful way to find the closest nodes but + // obviously correct. I believe that tree-based buckets would make + // this easier to implement efficiently. + close := &nodesByDistance{target: target} + for _, b := range tab.buckets { + for _, n := range b.entries { + close.push(n, nresults) + } + } + return close +} + +func (tab *Table) len() (n int) { + for _, b := range tab.buckets { + n += len(b.entries) + } + return n +} + +// bumpOrAdd updates the activity timestamp for the given node and +// attempts to insert the node into a bucket. The returned Node might +// not be part of the table. The caller must hold tab.mutex. +func (tab *Table) bumpOrAdd(node NodeID, from *net.UDPAddr) (n *Node) { + b := tab.buckets[logdist(tab.self.ID, node)] + if n = b.bump(node); n == nil { + n = &Node{ID: node, Addr: from, active: time.Now()} + if len(b.entries) == bucketSize { + tab.pingReplace(n, b) + } else { + b.entries = append(b.entries, n) + } + } + return n +} + +func (tab *Table) pingReplace(n *Node, b *bucket) { + old := b.entries[bucketSize-1] + go func() { + if err := tab.net.ping(old); err == nil { + // it responded, we don't need to replace it. + return + } + // it didn't respond, replace the node if it is still the oldest node. + tab.mutex.Lock() + if len(b.entries) > 0 && b.entries[len(b.entries)-1] == old { + // slide down other entries and put the new one in front. + copy(b.entries[1:], b.entries) + b.entries[0] = n + } + tab.mutex.Unlock() + }() +} + +// bump updates the activity timestamp for the given node. +// The caller must hold tab.mutex. +func (tab *Table) bump(node NodeID) { + tab.buckets[logdist(tab.self.ID, node)].bump(node) +} + +// add puts the entries into the table if their corresponding +// bucket is not full. The caller must hold tab.mutex. +func (tab *Table) add(entries []*Node) { +outer: + for _, n := range entries { + if n == nil || n.ID == tab.self.ID { + // skip bad entries. The RLP decoder returns nil for empty + // input lists. + continue + } + bucket := tab.buckets[logdist(tab.self.ID, n.ID)] + for i := range bucket.entries { + if bucket.entries[i].ID == n.ID { + // already in bucket + continue outer + } + } + if len(bucket.entries) < bucketSize { + bucket.entries = append(bucket.entries, n) + } + } +} + +func (b *bucket) bump(id NodeID) *Node { + for i, n := range b.entries { + if n.ID == id { + n.active = time.Now() + // move it to the front + copy(b.entries[1:], b.entries[:i+1]) + b.entries[0] = n + return n + } + } + return nil +} + +// nodesByDistance is a list of nodes, ordered by +// distance to target. +type nodesByDistance struct { + entries []*Node + target NodeID +} + +// push adds the given node to the list, keeping the total size below maxElems. +func (h *nodesByDistance) push(n *Node, maxElems int) { + ix := sort.Search(len(h.entries), func(i int) bool { + return distcmp(h.target, h.entries[i].ID, n.ID) > 0 + }) + if len(h.entries) < maxElems { + h.entries = append(h.entries, n) + } + if ix == len(h.entries) { + // farther away than all nodes we already have. + // if there was room for it, the node is now the last element. + } else { + // slide existing entries down to make room + // this will overwrite the entry we just appended. + copy(h.entries[ix+1:], h.entries[ix:]) + h.entries[ix] = n + } +} + +// NodeID is a unique identifier for each node. +// The node identifier is a marshaled elliptic curve public key. +type NodeID [512 / 8]byte + +// NodeID prints as a long hexadecimal number. +func (n NodeID) String() string { + return fmt.Sprintf("%#x", n[:]) +} + +// The Go syntax representation of a NodeID is a call to HexID. +func (n NodeID) GoString() string { + return fmt.Sprintf("HexID(\"%#x\")", n[:]) +} + +// HexID converts a hex string to a NodeID. +// The string may be prefixed with 0x. +func HexID(in string) NodeID { + if strings.HasPrefix(in, "0x") { + in = in[2:] + } + var id NodeID + b, err := hex.DecodeString(in) + if err != nil { + panic(err) + } else if len(b) != len(id) { + panic("wrong length") + } + copy(id[:], b) + return id +} + +func newNodeID(priv *ecdsa.PrivateKey) (id NodeID) { + pubkey := elliptic.Marshal(priv.Curve, priv.X, priv.Y) + if len(pubkey)-1 != len(id) { + panic(fmt.Errorf("invalid key: need %d bit pubkey, got %d bits", (len(id)+1)*8, len(pubkey))) + } + copy(id[:], pubkey[1:]) + return id +} + +// recoverNodeID computes the public key used to sign the +// given hash from the signature. +func recoverNodeID(hash, sig []byte) (id NodeID, err error) { + pubkey, err := secp256k1.RecoverPubkey(hash, sig) + if err != nil { + return id, err + } + if len(pubkey)-1 != len(id) { + return id, fmt.Errorf("recovered pubkey has %d bits, want %d bits", len(pubkey)*8, (len(id)+1)*8) + } + for i := range id { + id[i] = pubkey[i+1] + } + return id, nil +} + +// distcmp compares the distances a->target and b->target. +// Returns -1 if a is closer to target, 1 if b is closer to target +// and 0 if they are equal. +func distcmp(target, a, b NodeID) int { + for i := range target { + da := a[i] ^ target[i] + db := b[i] ^ target[i] + if da > db { + return 1 + } else if da < db { + return -1 + } + } + return 0 +} + +// table of leading zero counts for bytes [0..255] +var lzcount = [256]int{ + 8, 7, 6, 6, 5, 5, 5, 5, + 4, 4, 4, 4, 4, 4, 4, 4, + 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 3, + 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, +} + +// logdist returns the logarithmic distance between a and b, log2(a ^ b). +func logdist(a, b NodeID) int { + lz := 0 + for i := range a { + x := a[i] ^ b[i] + if x == 0 { + lz += 8 + } else { + lz += lzcount[x] + break + } + } + return len(a)*8 - lz +} + +// randomID returns a random NodeID such that logdist(a, b) == n +func randomID(a NodeID, n int) (b NodeID) { + if n == 0 { + return a + } + // flip bit at position n, fill the rest with random bits + b = a + pos := len(a) - n/8 - 1 + bit := byte(0x01) << (byte(n%8) - 1) + if bit == 0 { + pos++ + bit = 0x80 + } + b[pos] = a[pos]&^bit | ^a[pos]&bit // TODO: randomize end bits + for i := pos + 1; i < len(a); i++ { + b[i] = byte(rand.Intn(255)) + } + return b +} diff --git a/p2p/discover/table_test.go b/p2p/discover/table_test.go new file mode 100644 index 0000000000..88563fe653 --- /dev/null +++ b/p2p/discover/table_test.go @@ -0,0 +1,403 @@ +package discover + +import ( + "crypto/ecdsa" + "errors" + "fmt" + "math/big" + "math/rand" + "net" + "reflect" + "testing" + "testing/quick" + "time" + + "github.com/ethereum/go-ethereum/crypto" +) + +var ( + quickrand = rand.New(rand.NewSource(time.Now().Unix())) + quickcfg = &quick.Config{MaxCount: 5000, Rand: quickrand} +) + +func TestHexID(t *testing.T) { + ref := NodeID{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 106, 217, 182, 31, 165, 174, 1, 67, 7, 235, 220, 150, 66, 83, 173, 205, 159, 44, 10, 57, 42, 161, 26, 188} + id1 := HexID("0x000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc") + id2 := HexID("000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc") + + if id1 != ref { + t.Errorf("wrong id1\ngot %v\nwant %v", id1[:], ref[:]) + } + if id2 != ref { + t.Errorf("wrong id2\ngot %v\nwant %v", id2[:], ref[:]) + } +} + +func TestNodeID_recover(t *testing.T) { + prv := newkey() + hash := make([]byte, 32) + sig, err := crypto.Sign(hash, prv) + if err != nil { + t.Fatalf("signing error: %v", err) + } + + pub := newNodeID(prv) + recpub, err := recoverNodeID(hash, sig) + if err != nil { + t.Fatalf("recovery error: %v", err) + } + if pub != recpub { + t.Errorf("recovered wrong pubkey:\ngot: %v\nwant: %v", recpub, pub) + } +} + +func TestNodeID_distcmp(t *testing.T) { + distcmpBig := func(target, a, b NodeID) int { + tbig := new(big.Int).SetBytes(target[:]) + abig := new(big.Int).SetBytes(a[:]) + bbig := new(big.Int).SetBytes(b[:]) + return new(big.Int).Xor(tbig, abig).Cmp(new(big.Int).Xor(tbig, bbig)) + } + if err := quick.CheckEqual(distcmp, distcmpBig, quickcfg); err != nil { + t.Error(err) + } +} + +// the random tests is likely to miss the case where they're equal. +func TestNodeID_distcmpEqual(t *testing.T) { + base := NodeID{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} + x := NodeID{15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0} + if distcmp(base, x, x) != 0 { + t.Errorf("distcmp(base, x, x) != 0") + } +} + +func TestNodeID_logdist(t *testing.T) { + logdistBig := func(a, b NodeID) int { + abig, bbig := new(big.Int).SetBytes(a[:]), new(big.Int).SetBytes(b[:]) + return new(big.Int).Xor(abig, bbig).BitLen() + } + if err := quick.CheckEqual(logdist, logdistBig, quickcfg); err != nil { + t.Error(err) + } +} + +// the random tests is likely to miss the case where they're equal. +func TestNodeID_logdistEqual(t *testing.T) { + x := NodeID{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} + if logdist(x, x) != 0 { + t.Errorf("logdist(x, x) != 0") + } +} + +func TestNodeID_randomID(t *testing.T) { + // we don't use quick.Check here because its output isn't + // very helpful when the test fails. + for i := 0; i < quickcfg.MaxCount; i++ { + a := gen(NodeID{}, quickrand).(NodeID) + dist := quickrand.Intn(len(NodeID{}) * 8) + result := randomID(a, dist) + actualdist := logdist(result, a) + + if dist != actualdist { + t.Log("a: ", a) + t.Log("result:", result) + t.Fatalf("#%d: distance of result is %d, want %d", i, actualdist, dist) + } + } +} + +func (NodeID) Generate(rand *rand.Rand, size int) reflect.Value { + var id NodeID + m := rand.Intn(len(id)) + for i := len(id) - 1; i > m; i-- { + id[i] = byte(rand.Uint32()) + } + return reflect.ValueOf(id) +} + +func TestTable_bumpOrAddPingReplace(t *testing.T) { + pingC := make(pingC) + tab := newTable(pingC, NodeID{}, &net.UDPAddr{}) + last := fillBucket(tab, 200) + + // this bumpOrAdd should not replace the last node + // because the node replies to ping. + new := tab.bumpOrAdd(randomID(tab.self.ID, 200), nil) + + pinged := <-pingC + if pinged != last.ID { + t.Fatalf("pinged wrong node: %v\nwant %v", pinged, last.ID) + } + + tab.mutex.Lock() + defer tab.mutex.Unlock() + if l := len(tab.buckets[200].entries); l != bucketSize { + t.Errorf("wrong bucket size after bumpOrAdd: got %d, want %d", bucketSize, l) + } + if !contains(tab.buckets[200].entries, last.ID) { + t.Error("last entry was removed") + } + if contains(tab.buckets[200].entries, new.ID) { + t.Error("new entry was added") + } +} + +func TestTable_bumpOrAddPingTimeout(t *testing.T) { + tab := newTable(pingC(nil), NodeID{}, &net.UDPAddr{}) + last := fillBucket(tab, 200) + + // this bumpOrAdd should replace the last node + // because the node does not reply to ping. + new := tab.bumpOrAdd(randomID(tab.self.ID, 200), nil) + + // wait for async bucket update. damn. this needs to go away. + time.Sleep(2 * time.Millisecond) + + tab.mutex.Lock() + defer tab.mutex.Unlock() + if l := len(tab.buckets[200].entries); l != bucketSize { + t.Errorf("wrong bucket size after bumpOrAdd: got %d, want %d", bucketSize, l) + } + if contains(tab.buckets[200].entries, last.ID) { + t.Error("last entry was not removed") + } + if !contains(tab.buckets[200].entries, new.ID) { + t.Error("new entry was not added") + } +} + +func fillBucket(tab *Table, ld int) (last *Node) { + b := tab.buckets[ld] + for len(b.entries) < bucketSize { + b.entries = append(b.entries, &Node{ID: randomID(tab.self.ID, ld)}) + } + return b.entries[bucketSize-1] +} + +type pingC chan NodeID + +func (t pingC) findnode(n *Node, target NodeID) ([]*Node, error) { + panic("findnode called on pingRecorder") +} +func (t pingC) close() { + panic("close called on pingRecorder") +} +func (t pingC) ping(n *Node) error { + if t == nil { + return errTimeout + } + t <- n.ID + return nil +} + +func TestTable_bump(t *testing.T) { + tab := newTable(nil, NodeID{}, &net.UDPAddr{}) + + // add an old entry and two recent ones + oldactive := time.Now().Add(-2 * time.Minute) + old := &Node{ID: randomID(tab.self.ID, 200), active: oldactive} + others := []*Node{ + &Node{ID: randomID(tab.self.ID, 200), active: time.Now()}, + &Node{ID: randomID(tab.self.ID, 200), active: time.Now()}, + } + tab.add(append(others, old)) + if tab.buckets[200].entries[0] == old { + t.Fatal("old entry is at front of bucket") + } + + // bumping the old entry should move it to the front + tab.bump(old.ID) + if old.active == oldactive { + t.Error("activity timestamp not updated") + } + if tab.buckets[200].entries[0] != old { + t.Errorf("bumped entry did not move to the front of bucket") + } +} + +func TestTable_closest(t *testing.T) { + t.Parallel() + + test := func(test *closeTest) bool { + // for any node table, Target and N + tab := newTable(nil, test.Self, &net.UDPAddr{}) + tab.add(test.All) + + // check that doClosest(Target, N) returns nodes + result := tab.closest(test.Target, test.N).entries + if hasDuplicates(result) { + t.Errorf("result contains duplicates") + return false + } + if !sortedByDistanceTo(test.Target, result) { + t.Errorf("result is not sorted by distance to target") + return false + } + + // check that the number of results is min(N, tablen) + wantN := test.N + if tlen := tab.len(); tlen < test.N { + wantN = tlen + } + if len(result) != wantN { + t.Errorf("wrong number of nodes: got %d, want %d", len(result), wantN) + return false + } else if len(result) == 0 { + return true // no need to check distance + } + + // check that the result nodes have minimum distance to target. + for _, b := range tab.buckets { + for _, n := range b.entries { + if contains(result, n.ID) { + continue // don't run the check below for nodes in result + } + farthestResult := result[len(result)-1].ID + if distcmp(test.Target, n.ID, farthestResult) < 0 { + t.Errorf("table contains node that is closer to target but it's not in result") + t.Logf(" Target: %v", test.Target) + t.Logf(" Farthest Result: %v", farthestResult) + t.Logf(" ID: %v", n.ID) + return false + } + } + } + return true + } + if err := quick.Check(test, quickcfg); err != nil { + t.Error(err) + } +} + +type closeTest struct { + Self NodeID + Target NodeID + All []*Node + N int +} + +func (*closeTest) Generate(rand *rand.Rand, size int) reflect.Value { + t := &closeTest{ + Self: gen(NodeID{}, rand).(NodeID), + Target: gen(NodeID{}, rand).(NodeID), + N: rand.Intn(bucketSize), + } + for _, id := range gen([]NodeID{}, rand).([]NodeID) { + t.All = append(t.All, &Node{ID: id}) + } + return reflect.ValueOf(t) +} + +func TestTable_Lookup(t *testing.T) { + self := gen(NodeID{}, quickrand).(NodeID) + target := randomID(self, 200) + transport := findnodeOracle{t, target} + tab := newTable(transport, self, &net.UDPAddr{}) + + // lookup on empty table returns no nodes + if results := tab.Lookup(target); len(results) > 0 { + t.Fatalf("lookup on empty table returned %d results: %#v", len(results), results) + } + // seed table with initial node (otherwise lookup will terminate immediately) + tab.bumpOrAdd(randomID(target, 200), &net.UDPAddr{Port: 200}) + + results := tab.Lookup(target) + t.Logf("results:") + for _, e := range results { + t.Logf(" ld=%d, %v", logdist(target, e.ID), e.ID) + } + if len(results) != bucketSize { + t.Errorf("wrong number of results: got %d, want %d", len(results), bucketSize) + } + if hasDuplicates(results) { + t.Errorf("result set contains duplicate entries") + } + if !sortedByDistanceTo(target, results) { + t.Errorf("result set not sorted by distance to target") + } + if !contains(results, target) { + t.Errorf("result set does not contain target") + } +} + +// findnode on this transport always returns at least one node +// that is one bucket closer to the target. +type findnodeOracle struct { + t *testing.T + target NodeID +} + +func (t findnodeOracle) findnode(n *Node, target NodeID) ([]*Node, error) { + t.t.Logf("findnode query at dist %d", n.Addr.Port) + // current log distance is encoded in port number + var result []*Node + switch port := n.Addr.Port; port { + case 0: + panic("query to node at distance 0") + case 1: + result = append(result, &Node{ID: t.target, Addr: &net.UDPAddr{Port: 0}}) + default: + // TODO: add more randomness to distances + port-- + for i := 0; i < bucketSize; i++ { + result = append(result, &Node{ID: randomID(t.target, port), Addr: &net.UDPAddr{Port: port}}) + } + } + return result, nil +} + +func (t findnodeOracle) close() {} + +func (t findnodeOracle) ping(n *Node) error { + return errors.New("ping is not supported by this transport") +} + +func hasDuplicates(slice []*Node) bool { + seen := make(map[NodeID]bool) + for _, e := range slice { + if seen[e.ID] { + return true + } + seen[e.ID] = true + } + return false +} + +func sortedByDistanceTo(distbase NodeID, slice []*Node) bool { + var last NodeID + for i, e := range slice { + if i > 0 && distcmp(distbase, e.ID, last) < 0 { + return false + } + last = e.ID + } + return true +} + +func contains(ns []*Node, id NodeID) bool { + for _, n := range ns { + if n.ID == id { + return true + } + } + return false +} + +// gen wraps quick.Value so it's easier to use. +// it generates a random value of the given value's type. +func gen(typ interface{}, rand *rand.Rand) interface{} { + v, ok := quick.Value(reflect.TypeOf(typ), rand) + if !ok { + panic(fmt.Sprintf("couldn't generate random value of type %T", typ)) + } + return v.Interface() +} + +func newkey() *ecdsa.PrivateKey { + key, err := crypto.GenerateKey() + if err != nil { + panic("couldn't generate key: " + err.Error()) + } + return key +} diff --git a/p2p/discover/udp.go b/p2p/discover/udp.go new file mode 100644 index 0000000000..ec1f62dac9 --- /dev/null +++ b/p2p/discover/udp.go @@ -0,0 +1,422 @@ +package discover + +import ( + "bytes" + "crypto/ecdsa" + "errors" + "fmt" + "net" + "time" + + "github.com/ethereum/go-ethereum/crypto" + "github.com/ethereum/go-ethereum/logger" + "github.com/ethereum/go-ethereum/rlp" +) + +var log = logger.NewLogger("P2P Discovery") + +// Errors +var ( + errPacketTooSmall = errors.New("too small") + errBadHash = errors.New("bad hash") + errExpired = errors.New("expired") + errTimeout = errors.New("RPC timeout") + errClosed = errors.New("socket closed") +) + +// Timeouts +const ( + respTimeout = 300 * time.Millisecond + sendTimeout = 300 * time.Millisecond + expiration = 3 * time.Second + + refreshInterval = 1 * time.Hour +) + +// RPC packet types +const ( + pingPacket = iota + 1 // zero is 'reserved' + pongPacket + findnodePacket + neighborsPacket +) + +// RPC request structures +type ( + ping struct { + IP string // our IP + Port uint16 // our port + Expiration uint64 + } + + // reply to Ping + pong struct { + ReplyTok []byte + Expiration uint64 + } + + findnode struct { + // Id to look up. The responding node will send back nodes + // closest to the target. + Target NodeID + Expiration uint64 + } + + // reply to findnode + neighbors struct { + Nodes []*Node + Expiration uint64 + } +) + +// udp implements the RPC protocol. +type udp struct { + conn *net.UDPConn + priv *ecdsa.PrivateKey + addpending chan *pending + replies chan reply + closing chan struct{} + + *Table +} + +// pending represents a pending reply. +// +// some implementations of the protocol wish to send more than one +// reply packet to findnode. in general, any neighbors packet cannot +// be matched up with a specific findnode packet. +// +// our implementation handles this by storing a callback function for +// each pending reply. incoming packets from a node are dispatched +// to all the callback functions for that node. +type pending struct { + // these fields must match in the reply. + from NodeID + ptype byte + + // time when the request must complete + deadline time.Time + + // callback is called when a matching reply arrives. if it returns + // true, the callback is removed from the pending reply queue. + // if it returns false, the reply is considered incomplete and + // the callback will be invoked again for the next matching reply. + callback func(resp interface{}) (done bool) + + // errc receives nil when the callback indicates completion or an + // error if no further reply is received within the timeout. + errc chan<- error +} + +type reply struct { + from NodeID + ptype byte + data interface{} +} + +// ListenUDP returns a new table that listens for UDP packets on laddr. +func ListenUDP(priv *ecdsa.PrivateKey, laddr string) (*Table, error) { + net, realaddr, err := listen(priv, laddr) + if err != nil { + return nil, err + } + net.Table = newTable(net, newNodeID(priv), realaddr) + log.DebugDetailf("Listening on %v, my ID %x\n", realaddr, net.self.ID[:]) + return net.Table, nil +} + +func listen(priv *ecdsa.PrivateKey, laddr string) (*udp, *net.UDPAddr, error) { + addr, err := net.ResolveUDPAddr("udp", laddr) + if err != nil { + return nil, nil, err + } + conn, err := net.ListenUDP("udp", addr) + if err != nil { + return nil, nil, err + } + realaddr := conn.LocalAddr().(*net.UDPAddr) + + udp := &udp{ + conn: conn, + priv: priv, + closing: make(chan struct{}), + addpending: make(chan *pending), + replies: make(chan reply), + } + go udp.loop() + go udp.readLoop() + return udp, realaddr, nil +} + +func (t *udp) close() { + close(t.closing) + t.conn.Close() + // TODO: wait for the loops to end. +} + +// ping sends a ping message to the given node and waits for a reply. +func (t *udp) ping(e *Node) error { + // TODO: maybe check for ReplyTo field in callback to measure RTT + errc := t.pending(e.ID, pongPacket, func(interface{}) bool { return true }) + t.send(e, pingPacket, ping{ + IP: t.self.Addr.String(), + Port: uint16(t.self.Addr.Port), + Expiration: uint64(time.Now().Add(expiration).Unix()), + }) + return <-errc +} + +// findnode sends a findnode request to the given node and waits until +// the node has sent up to k neighbors. +func (t *udp) findnode(to *Node, target NodeID) ([]*Node, error) { + nodes := make([]*Node, 0, bucketSize) + nreceived := 0 + errc := t.pending(to.ID, neighborsPacket, func(r interface{}) bool { + reply := r.(*neighbors) + for i := 0; i < len(reply.Nodes); i++ { + nreceived++ + n := reply.Nodes[i] + if validAddr(n.Addr) && n.ID != t.self.ID { + nodes = append(nodes, n) + } + } + return nreceived == bucketSize + }) + + t.send(to, findnodePacket, findnode{ + Target: target, + Expiration: uint64(time.Now().Add(expiration).Unix()), + }) + err := <-errc + return nodes, err +} + +func validAddr(a *net.UDPAddr) bool { + return !a.IP.IsMulticast() && !a.IP.IsUnspecified() && a.Port != 0 +} + +// pending adds a reply callback to the pending reply queue. +// see the documentation of type pending for a detailed explanation. +func (t *udp) pending(id NodeID, ptype byte, callback func(interface{}) bool) <-chan error { + ch := make(chan error, 1) + p := &pending{from: id, ptype: ptype, callback: callback, errc: ch} + select { + case t.addpending <- p: + // loop will handle it + case <-t.closing: + ch <- errClosed + } + return ch +} + +// loop runs in its own goroutin. it keeps track of +// the refresh timer and the pending reply queue. +func (t *udp) loop() { + var ( + pending []*pending + nextDeadline time.Time + timeout = time.NewTimer(0) + refresh = time.NewTicker(refreshInterval) + ) + <-timeout.C // ignore first timeout + defer refresh.Stop() + defer timeout.Stop() + + rearmTimeout := func() { + if len(pending) == 0 || nextDeadline == pending[0].deadline { + return + } + nextDeadline = pending[0].deadline + timeout.Reset(nextDeadline.Sub(time.Now())) + } + + for { + select { + case <-refresh.C: + go t.refresh() + + case <-t.closing: + for _, p := range pending { + p.errc <- errClosed + } + return + + case p := <-t.addpending: + p.deadline = time.Now().Add(respTimeout) + pending = append(pending, p) + rearmTimeout() + + case reply := <-t.replies: + // run matching callbacks, remove if they return false. + for i, p := range pending { + if reply.from == p.from && reply.ptype == p.ptype && p.callback(reply.data) { + p.errc <- nil + copy(pending[i:], pending[i+1:]) + pending = pending[:len(pending)-1] + i-- + } + } + rearmTimeout() + + case now := <-timeout.C: + // notify and remove callbacks whose deadline is in the past. + i := 0 + for ; i < len(pending) && now.After(pending[i].deadline); i++ { + pending[i].errc <- errTimeout + } + if i > 0 { + copy(pending, pending[i:]) + pending = pending[:len(pending)-i] + } + rearmTimeout() + } + } +} + +const ( + macSize = 256 / 8 + sigSize = 520 / 8 + headSize = macSize + sigSize // space of packet frame data +) + +var headSpace = make([]byte, headSize) + +func (t *udp) send(to *Node, ptype byte, req interface{}) error { + b := new(bytes.Buffer) + b.Write(headSpace) + b.WriteByte(ptype) + if err := rlp.Encode(b, req); err != nil { + log.Errorln("error encoding packet:", err) + return err + } + + packet := b.Bytes() + sig, err := crypto.Sign(crypto.Sha3(packet[headSize:]), t.priv) + if err != nil { + log.Errorln("could not sign packet:", err) + return err + } + copy(packet[macSize:], sig) + // add the hash to the front. Note: this doesn't protect the + // packet in any way. Our public key will be part of this hash in + // the future. + copy(packet, crypto.Sha3(packet[macSize:])) + + log.DebugDetailf(">>> %v %T %v\n", to.Addr, req, req) + if _, err = t.conn.WriteToUDP(packet, to.Addr); err != nil { + log.DebugDetailln("UDP send failed:", err) + } + return err +} + +// readLoop runs in its own goroutine. it handles incoming UDP packets. +func (t *udp) readLoop() { + defer t.conn.Close() + buf := make([]byte, 4096) // TODO: good buffer size + for { + nbytes, from, err := t.conn.ReadFromUDP(buf) + if err != nil { + return + } + if err := t.packetIn(from, buf[:nbytes]); err != nil { + log.Debugf("Bad packet from %v: %v\n", from, err) + } + } +} + +func (t *udp) packetIn(from *net.UDPAddr, buf []byte) error { + if len(buf) < headSize+1 { + return errPacketTooSmall + } + hash, sig, sigdata := buf[:macSize], buf[macSize:headSize], buf[headSize:] + shouldhash := crypto.Sha3(buf[macSize:]) + if !bytes.Equal(hash, shouldhash) { + return errBadHash + } + fromID, err := recoverNodeID(crypto.Sha3(buf[headSize:]), sig) + if err != nil { + return err + } + + var req interface { + handle(t *udp, from *net.UDPAddr, fromID NodeID, mac []byte) error + } + switch ptype := sigdata[0]; ptype { + case pingPacket: + req = new(ping) + case pongPacket: + req = new(pong) + case findnodePacket: + req = new(findnode) + case neighborsPacket: + req = new(neighbors) + default: + return fmt.Errorf("unknown type: %d", ptype) + } + if err := rlp.Decode(bytes.NewReader(sigdata[1:]), req); err != nil { + return err + } + log.DebugDetailf("<<< %v %T %v\n", from, req, req) + return req.handle(t, from, fromID, hash) +} + +func (req *ping) handle(t *udp, from *net.UDPAddr, fromID NodeID, mac []byte) error { + if expired(req.Expiration) { + return errExpired + } + t.mutex.Lock() + // Note: we're ignoring the provided IP/Port right now. + e := t.bumpOrAdd(fromID, from) + t.mutex.Unlock() + + t.send(e, pongPacket, pong{ + ReplyTok: mac, + Expiration: uint64(time.Now().Add(expiration).Unix()), + }) + return nil +} + +func (req *pong) handle(t *udp, from *net.UDPAddr, fromID NodeID, mac []byte) error { + if expired(req.Expiration) { + return errExpired + } + t.mutex.Lock() + t.bump(fromID) + t.mutex.Unlock() + + t.replies <- reply{fromID, pongPacket, req} + return nil +} + +func (req *findnode) handle(t *udp, from *net.UDPAddr, fromID NodeID, mac []byte) error { + if expired(req.Expiration) { + return errExpired + } + t.mutex.Lock() + e := t.bumpOrAdd(fromID, from) + closest := t.closest(req.Target, bucketSize).entries + t.mutex.Unlock() + + t.send(e, neighborsPacket, neighbors{ + Nodes: closest, + Expiration: uint64(time.Now().Add(expiration).Unix()), + }) + return nil +} + +func (req *neighbors) handle(t *udp, from *net.UDPAddr, fromID NodeID, mac []byte) error { + if expired(req.Expiration) { + return errExpired + } + t.mutex.Lock() + t.bump(fromID) + t.add(req.Nodes) + t.mutex.Unlock() + + t.replies <- reply{fromID, neighborsPacket, req} + return nil +} + +func expired(ts uint64) bool { + return time.Unix(int64(ts), 0).Before(time.Now()) +} diff --git a/p2p/discover/udp_test.go b/p2p/discover/udp_test.go new file mode 100644 index 0000000000..f2ab2b6619 --- /dev/null +++ b/p2p/discover/udp_test.go @@ -0,0 +1,156 @@ +package discover + +import ( + logpkg "log" + "net" + "os" + "testing" + "time" + + "github.com/ethereum/go-ethereum/logger" +) + +func init() { + logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, logpkg.LstdFlags, logger.DebugLevel)) +} + +func TestUDP_ping(t *testing.T) { + t.Parallel() + + n1, _ := ListenUDP(newkey(), "127.0.0.1:0") + n2, _ := ListenUDP(newkey(), "127.0.0.1:0") + defer n1.net.close() + defer n2.net.close() + + if err := n1.net.ping(n2.self); err != nil { + t.Fatalf("ping error: %v", err) + } + if find(n2, n1.self.ID) == nil { + t.Errorf("node 2 does not contain id of node 1") + } + if e := find(n1, n2.self.ID); e != nil { + t.Errorf("node 1 does contains id of node 2: %v", e) + } +} + +func find(tab *Table, id NodeID) *Node { + for _, b := range tab.buckets { + for _, e := range b.entries { + if e.ID == id { + return e + } + } + } + return nil +} + +func TestUDP_findnode(t *testing.T) { + t.Parallel() + + n1, _ := ListenUDP(newkey(), "127.0.0.1:0") + n2, _ := ListenUDP(newkey(), "127.0.0.1:0") + defer n1.net.close() + defer n2.net.close() + + entry := &Node{ID: NodeID{1}, Addr: &net.UDPAddr{IP: net.IP{1, 2, 3, 4}, Port: 15}} + n2.add([]*Node{entry}) + + target := randomID(n1.self.ID, 100) + result, _ := n1.net.findnode(n2.self, target) + if len(result) != 1 { + t.Fatalf("wrong number of results: got %d, want 1", len(result)) + } + if result[0].ID != entry.ID { + t.Errorf("wrong result: got %v, want %v", result[0], entry) + } +} + +func TestUDP_replytimeout(t *testing.T) { + t.Parallel() + + // reserve a port so we don't talk to an existing service by accident + addr, _ := net.ResolveUDPAddr("udp", "127.0.0.1:0") + fd, err := net.ListenUDP("udp", addr) + if err != nil { + t.Fatal(err) + } + defer fd.Close() + + n1, _ := ListenUDP(newkey(), "127.0.0.1:0") + defer n1.net.close() + n2 := n1.bumpOrAdd(randomID(n1.self.ID, 10), fd.LocalAddr().(*net.UDPAddr)) + + if err := n1.net.ping(n2); err != errTimeout { + t.Error("expected timeout error, got", err) + } + + if result, err := n1.net.findnode(n2, n1.self.ID); err != errTimeout { + t.Error("expected timeout error, got", err) + } else if len(result) > 0 { + t.Error("expected empty result, got", result) + } +} + +func TestUDP_findnodeMultiReply(t *testing.T) { + t.Parallel() + + n1, _ := ListenUDP(newkey(), "127.0.0.1:0") + n2, _ := ListenUDP(newkey(), "127.0.0.1:0") + udp2 := n2.net.(*udp) + defer n1.net.close() + defer n2.net.close() + + nodes := make([]*Node, bucketSize) + for i := range nodes { + nodes[i] = &Node{ + Addr: &net.UDPAddr{IP: net.IP{1, 2, 3, 4}, Port: i + 1}, + ID: randomID(n2.self.ID, i+1), + } + } + + // ask N2 for neighbors. it will send an empty reply back. + // the request will wait for up to bucketSize replies. + resultC := make(chan []*Node) + go func() { + ns, err := n1.net.findnode(n2.self, n1.self.ID) + if err != nil { + t.Error("findnode error:", err) + } + resultC <- ns + }() + + // send a few more neighbors packets to N1. + // it should collect those. + for end := 0; end < len(nodes); { + off := end + if end = end + 5; end > len(nodes) { + end = len(nodes) + } + udp2.send(n1.self, neighborsPacket, neighbors{ + Nodes: nodes[off:end], + Expiration: uint64(time.Now().Add(10 * time.Second).Unix()), + }) + } + + // check that they are all returned. we cannot just check for + // equality because they might not be returned in the order they + // were sent. + result := <-resultC + if hasDuplicates(result) { + t.Error("result slice contains duplicates") + } + if len(result) != len(nodes) { + t.Errorf("wrong number of nodes returned: got %d, want %d", len(result), len(nodes)) + } + matched := make(map[NodeID]bool) + for _, n := range result { + for _, expn := range nodes { + if n.ID == expn.ID { // && bytes.Equal(n.Addr.IP, expn.Addr.IP) && n.Addr.Port == expn.Addr.Port { + matched[n.ID] = true + } + } + } + if len(matched) != len(nodes) { + t.Errorf("wrong number of matching nodes: got %d, want %d", len(matched), len(nodes)) + } +} From 739066ec56393e63b93531787746fb8ba5f1df15 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Thu, 5 Feb 2015 03:07:18 +0100 Subject: [PATCH 29/54] p2p/discover: add some helper functions --- p2p/discover/table.go | 37 +++++++++++++++++++++++++++++-------- p2p/discover/table_test.go | 6 +++--- p2p/discover/udp.go | 4 ++-- p2p/discover/udp_test.go | 14 +++++++------- 4 files changed, 41 insertions(+), 20 deletions(-) diff --git a/p2p/discover/table.go b/p2p/discover/table.go index 26526330be..ea9680404b 100644 --- a/p2p/discover/table.go +++ b/p2p/discover/table.go @@ -87,6 +87,16 @@ func newTable(t transport, ourID NodeID, ourAddr *net.UDPAddr) *Table { return tab } +// Self returns the local node ID. +func (tab *Table) Self() NodeID { + return tab.self.ID +} + +// Close terminates the network listener. +func (tab *Table) Close() { + tab.net.close() +} + // Bootstrap sets the bootstrap nodes. These nodes are used to connect // to the network if the table is empty. Bootstrap will also attempt to // fill the table by performing random lookup operations on the @@ -319,27 +329,38 @@ func (n NodeID) GoString() string { // HexID converts a hex string to a NodeID. // The string may be prefixed with 0x. -func HexID(in string) NodeID { +func HexID(in string) (NodeID, error) { if strings.HasPrefix(in, "0x") { in = in[2:] } var id NodeID b, err := hex.DecodeString(in) if err != nil { - panic(err) + return id, err } else if len(b) != len(id) { - panic("wrong length") + return id, fmt.Errorf("wrong length, need %d hex bytes", len(id)) } copy(id[:], b) + return id, nil +} + +// MustHexID converts a hex string to a NodeID. +// It panics if the string is not a valid NodeID. +func MustHexID(in string) NodeID { + id, err := HexID(in) + if err != nil { + panic(err) + } return id } -func newNodeID(priv *ecdsa.PrivateKey) (id NodeID) { - pubkey := elliptic.Marshal(priv.Curve, priv.X, priv.Y) - if len(pubkey)-1 != len(id) { - panic(fmt.Errorf("invalid key: need %d bit pubkey, got %d bits", (len(id)+1)*8, len(pubkey))) +func PubkeyID(pub *ecdsa.PublicKey) NodeID { + var id NodeID + pbytes := elliptic.Marshal(pub.Curve, pub.X, pub.Y) + if len(pbytes)-1 != len(id) { + panic(fmt.Errorf("invalid key: need %d bit pubkey, got %d bits", (len(id)+1)*8, len(pbytes))) } - copy(id[:], pubkey[1:]) + copy(id[:], pbytes[1:]) return id } diff --git a/p2p/discover/table_test.go b/p2p/discover/table_test.go index 88563fe653..90f89b1476 100644 --- a/p2p/discover/table_test.go +++ b/p2p/discover/table_test.go @@ -22,8 +22,8 @@ var ( func TestHexID(t *testing.T) { ref := NodeID{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 106, 217, 182, 31, 165, 174, 1, 67, 7, 235, 220, 150, 66, 83, 173, 205, 159, 44, 10, 57, 42, 161, 26, 188} - id1 := HexID("0x000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc") - id2 := HexID("000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc") + id1 := MustHexID("0x000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc") + id2 := MustHexID("000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc") if id1 != ref { t.Errorf("wrong id1\ngot %v\nwant %v", id1[:], ref[:]) @@ -41,7 +41,7 @@ func TestNodeID_recover(t *testing.T) { t.Fatalf("signing error: %v", err) } - pub := newNodeID(prv) + pub := PubkeyID(&prv.PublicKey) recpub, err := recoverNodeID(hash, sig) if err != nil { t.Fatalf("recovery error: %v", err) diff --git a/p2p/discover/udp.go b/p2p/discover/udp.go index ec1f62dac9..449139c1d8 100644 --- a/p2p/discover/udp.go +++ b/p2p/discover/udp.go @@ -120,8 +120,8 @@ func ListenUDP(priv *ecdsa.PrivateKey, laddr string) (*Table, error) { if err != nil { return nil, err } - net.Table = newTable(net, newNodeID(priv), realaddr) - log.DebugDetailf("Listening on %v, my ID %x\n", realaddr, net.self.ID[:]) + net.Table = newTable(net, PubkeyID(&priv.PublicKey), realaddr) + log.Debugf("Listening on %v, my ID %x\n", realaddr, net.self.ID[:]) return net.Table, nil } diff --git a/p2p/discover/udp_test.go b/p2p/discover/udp_test.go index f2ab2b6619..8ed6ec9c0a 100644 --- a/p2p/discover/udp_test.go +++ b/p2p/discover/udp_test.go @@ -19,8 +19,8 @@ func TestUDP_ping(t *testing.T) { n1, _ := ListenUDP(newkey(), "127.0.0.1:0") n2, _ := ListenUDP(newkey(), "127.0.0.1:0") - defer n1.net.close() - defer n2.net.close() + defer n1.Close() + defer n2.Close() if err := n1.net.ping(n2.self); err != nil { t.Fatalf("ping error: %v", err) @@ -49,8 +49,8 @@ func TestUDP_findnode(t *testing.T) { n1, _ := ListenUDP(newkey(), "127.0.0.1:0") n2, _ := ListenUDP(newkey(), "127.0.0.1:0") - defer n1.net.close() - defer n2.net.close() + defer n1.Close() + defer n2.Close() entry := &Node{ID: NodeID{1}, Addr: &net.UDPAddr{IP: net.IP{1, 2, 3, 4}, Port: 15}} n2.add([]*Node{entry}) @@ -77,7 +77,7 @@ func TestUDP_replytimeout(t *testing.T) { defer fd.Close() n1, _ := ListenUDP(newkey(), "127.0.0.1:0") - defer n1.net.close() + defer n1.Close() n2 := n1.bumpOrAdd(randomID(n1.self.ID, 10), fd.LocalAddr().(*net.UDPAddr)) if err := n1.net.ping(n2); err != errTimeout { @@ -97,8 +97,8 @@ func TestUDP_findnodeMultiReply(t *testing.T) { n1, _ := ListenUDP(newkey(), "127.0.0.1:0") n2, _ := ListenUDP(newkey(), "127.0.0.1:0") udp2 := n2.net.(*udp) - defer n1.net.close() - defer n2.net.close() + defer n1.Close() + defer n2.Close() nodes := make([]*Node, bucketSize) for i := range nodes { From 5bdc1159433138d92ed6fefb253e3c6ed3a43995 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Thu, 5 Feb 2015 03:07:58 +0100 Subject: [PATCH 30/54] p2p: integrate p2p/discover Overview of changes: - ClientIdentity has been removed, use discover.NodeID - Server now requires a private key to be set (instead of public key) - Server performs the encryption handshake before launching Peer - Dial logic takes peers from discover table - Encryption handshake code has been cleaned up a bit - baseProtocol is gone because we don't exchange peers anymore - Some parts of baseProtocol have moved into Peer instead --- p2p/client_identity.go | 68 ----- p2p/client_identity_test.go | 35 --- p2p/crypto.go | 429 ++++++++++++++--------------- p2p/crypto_test.go | 171 ++++-------- p2p/message.go | 117 +++++++- p2p/message_test.go | 140 +++++++--- p2p/peer.go | 518 +++++++++++++----------------------- p2p/peer_error.go | 56 ++-- p2p/peer_test.go | 296 +++++++++++---------- p2p/protocol.go | 248 ----------------- p2p/protocol_test.go | 167 ------------ p2p/server.go | 343 +++++++++++++----------- p2p/server_test.go | 85 +++--- p2p/testlog_test.go | 2 +- p2p/testpoc7.go | 40 --- 15 files changed, 1056 insertions(+), 1659 deletions(-) delete mode 100644 p2p/client_identity.go delete mode 100644 p2p/client_identity_test.go delete mode 100644 p2p/protocol_test.go delete mode 100644 p2p/testpoc7.go diff --git a/p2p/client_identity.go b/p2p/client_identity.go deleted file mode 100644 index ef01f1ad78..0000000000 --- a/p2p/client_identity.go +++ /dev/null @@ -1,68 +0,0 @@ -package p2p - -import ( - "fmt" - "runtime" -) - -// ClientIdentity represents the identity of a peer. -type ClientIdentity interface { - String() string // human readable identity - Pubkey() []byte // 512-bit public key -} - -type SimpleClientIdentity struct { - clientIdentifier string - version string - customIdentifier string - os string - implementation string - privkey []byte - pubkey []byte -} - -func NewSimpleClientIdentity(clientIdentifier string, version string, customIdentifier string, pubkey []byte) *SimpleClientIdentity { - clientIdentity := &SimpleClientIdentity{ - clientIdentifier: clientIdentifier, - version: version, - customIdentifier: customIdentifier, - os: runtime.GOOS, - implementation: runtime.Version(), - pubkey: pubkey, - } - - return clientIdentity -} - -func (c *SimpleClientIdentity) init() { -} - -func (c *SimpleClientIdentity) String() string { - var id string - if len(c.customIdentifier) > 0 { - id = "/" + c.customIdentifier - } - - return fmt.Sprintf("%s/v%s%s/%s/%s", - c.clientIdentifier, - c.version, - id, - c.os, - c.implementation) -} - -func (c *SimpleClientIdentity) Privkey() []byte { - return c.privkey -} - -func (c *SimpleClientIdentity) Pubkey() []byte { - return c.pubkey -} - -func (c *SimpleClientIdentity) SetCustomIdentifier(customIdentifier string) { - c.customIdentifier = customIdentifier -} - -func (c *SimpleClientIdentity) GetCustomIdentifier() string { - return c.customIdentifier -} diff --git a/p2p/client_identity_test.go b/p2p/client_identity_test.go deleted file mode 100644 index 7b62f05ef0..0000000000 --- a/p2p/client_identity_test.go +++ /dev/null @@ -1,35 +0,0 @@ -package p2p - -import ( - "bytes" - "fmt" - "runtime" - "testing" -) - -func TestClientIdentity(t *testing.T) { - clientIdentity := NewSimpleClientIdentity("Ethereum(G)", "0.5.16", "test", []byte("pubkey")) - key := clientIdentity.Pubkey() - if !bytes.Equal(key, []byte("pubkey")) { - t.Errorf("Expected Pubkey to be %x, got %x", key, []byte("pubkey")) - } - clientString := clientIdentity.String() - expected := fmt.Sprintf("Ethereum(G)/v0.5.16/test/%s/%s", runtime.GOOS, runtime.Version()) - if clientString != expected { - t.Errorf("Expected clientIdentity to be %v, got %v", expected, clientString) - } - customIdentifier := clientIdentity.GetCustomIdentifier() - if customIdentifier != "test" { - t.Errorf("Expected clientIdentity.GetCustomIdentifier() to be 'test', got %v", customIdentifier) - } - clientIdentity.SetCustomIdentifier("test2") - customIdentifier = clientIdentity.GetCustomIdentifier() - if customIdentifier != "test2" { - t.Errorf("Expected clientIdentity.GetCustomIdentifier() to be 'test2', got %v", customIdentifier) - } - clientString = clientIdentity.String() - expected = fmt.Sprintf("Ethereum(G)/v0.5.16/test2/%s/%s", runtime.GOOS, runtime.Version()) - if clientString != expected { - t.Errorf("Expected clientIdentity to be %v, got %v", expected, clientString) - } -} diff --git a/p2p/crypto.go b/p2p/crypto.go index cb0534cba0..2692d708c9 100644 --- a/p2p/crypto.go +++ b/p2p/crypto.go @@ -10,28 +10,25 @@ import ( "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/crypto/secp256k1" ethlogger "github.com/ethereum/go-ethereum/logger" + "github.com/ethereum/go-ethereum/p2p/discover" "github.com/obscuren/ecies" ) var clogger = ethlogger.NewLogger("CRYPTOID") const ( - sskLen int = 16 // ecies.MaxSharedKeyLength(pubKey) / 2 - sigLen int = 65 // elliptic S256 - pubLen int = 64 // 512 bit pubkey in uncompressed representation without format byte - shaLen int = 32 // hash length (for nonce etc) - msgLen int = 194 // sigLen + shaLen + pubLen + shaLen + 1 = 194 - resLen int = 97 // pubLen + shaLen + 1 - iHSLen int = 307 // size of the final ECIES payload sent as initiator's handshake - rHSLen int = 210 // size of the final ECIES payload sent as receiver's handshake -) + sskLen = 16 // ecies.MaxSharedKeyLength(pubKey) / 2 + sigLen = 65 // elliptic S256 + pubLen = 64 // 512 bit pubkey in uncompressed representation without format byte + shaLen = 32 // hash length (for nonce etc) -// secretRW implements a message read writer with encryption and authentication -// it is initialised by cryptoId.Run() after a successful crypto handshake -// aesSecret, macSecret, egressMac, ingress -type secretRW struct { - aesSecret, macSecret, egressMac, ingressMac []byte -} + authMsgLen = sigLen + shaLen + pubLen + shaLen + 1 + authRespLen = pubLen + shaLen + 1 + + eciesBytes = 65 + 16 + 32 + iHSLen = authMsgLen + eciesBytes // size of the final ECIES payload sent as initiator's handshake + rHSLen = authRespLen + eciesBytes // size of the final ECIES payload sent as receiver's handshake +) type hexkey []byte @@ -39,150 +36,73 @@ func (self hexkey) String() string { return fmt.Sprintf("(%d) %x", len(self), []byte(self)) } -var nonceF = func(b []byte) (n int, err error) { - return rand.Read(b) -} - -var step = 0 -var detnonceF = func(b []byte) (n int, err error) { - step++ - copy(b, crypto.Sha3([]byte("privacy"+string(step)))) - fmt.Printf("detkey %v: %v\n", step, hexkey(b)) - return +func encHandshake(conn io.ReadWriter, prv *ecdsa.PrivateKey, dial *discover.Node) ( + remoteID discover.NodeID, + sessionToken []byte, + err error, +) { + if dial == nil { + var remotePubkey []byte + sessionToken, remotePubkey, err = inboundEncHandshake(conn, prv, nil) + copy(remoteID[:], remotePubkey) + } else { + remoteID = dial.ID + sessionToken, err = outboundEncHandshake(conn, prv, remoteID[:], nil) + } + return remoteID, sessionToken, err } -var keyF = func() (priv *ecdsa.PrivateKey, err error) { - priv, err = ecdsa.GenerateKey(crypto.S256(), rand.Reader) +// outboundEncHandshake negotiates a session token on conn. +// it should be called on the dialing side of the connection. +// +// privateKey is the local client's private key +// remotePublicKey is the remote peer's node ID +// sessionToken is the token from a previous session with this node. +func outboundEncHandshake(conn io.ReadWriter, prvKey *ecdsa.PrivateKey, remotePublicKey []byte, sessionToken []byte) ( + newSessionToken []byte, + err error, +) { + auth, initNonce, randomPrivKey, err := authMsg(prvKey, remotePublicKey, sessionToken) if err != nil { - return + return nil, err } - return -} - -var detkeyF = func() (priv *ecdsa.PrivateKey, err error) { - s := make([]byte, 32) - detnonceF(s) - priv = crypto.ToECDSA(s) - return -} - -/* -NewSecureSession(connection, privateKey, remotePublicKey, sessionToken, initiator) is called when the peer connection starts to set up a secure session by performing a crypto handshake. - - connection is (a buffered) network connection. - - privateKey is the local client's private key (*ecdsa.PrivateKey) - - remotePublicKey is the remote peer's node Id ([]byte) - - sessionToken is the token from the previous session with this same peer. Nil if no token is found. - - initiator is a boolean flag. True if the node is the initiator of the connection (ie., remote is an outbound peer reached by dialing out). False if the connection was established by accepting a call from the remote peer via a listener. - - It returns a secretRW which implements the MsgReadWriter interface. -*/ -func NewSecureSession(conn io.ReadWriter, prvKey *ecdsa.PrivateKey, remotePubKeyS []byte, sessionToken []byte, initiator bool) (token []byte, rw *secretRW, err error) { - var auth, initNonce, recNonce []byte - var read int - var randomPrivKey *ecdsa.PrivateKey - var remoteRandomPubKey *ecdsa.PublicKey - clogger.Debugf("attempting session with %v", hexkey(remotePubKeyS)) - if initiator { - if auth, initNonce, randomPrivKey, _, err = startHandshake(prvKey, remotePubKeyS, sessionToken); err != nil { - return - } - if sessionToken != nil { - clogger.Debugf("session-token: %v", hexkey(sessionToken)) - } - clogger.Debugf("initiator-nonce: %v", hexkey(initNonce)) - clogger.Debugf("initiator-random-private-key: %v", hexkey(crypto.FromECDSA(randomPrivKey))) - randomPublicKeyS, _ := ExportPublicKey(&randomPrivKey.PublicKey) - clogger.Debugf("initiator-random-public-key: %v", hexkey(randomPublicKeyS)) - - if _, err = conn.Write(auth); err != nil { - return - } - clogger.Debugf("initiator handshake (sent to %v):\n%v", hexkey(remotePubKeyS), hexkey(auth)) - var response []byte = make([]byte, rHSLen) - if read, err = conn.Read(response); err != nil || read == 0 { - return - } - if read != rHSLen { - err = fmt.Errorf("remote receiver's handshake has invalid length. expect %v, got %v", rHSLen, read) - return - } - // write out auth message - // wait for response, then call complete - if recNonce, remoteRandomPubKey, _, err = completeHandshake(response, prvKey); err != nil { - return - } - clogger.Debugf("receiver-nonce: %v", hexkey(recNonce)) - remoteRandomPubKeyS, _ := ExportPublicKey(remoteRandomPubKey) - clogger.Debugf("receiver-random-public-key: %v", hexkey(remoteRandomPubKeyS)) - - } else { - auth = make([]byte, iHSLen) - clogger.Debugf("waiting for initiator handshake (from %v)", hexkey(remotePubKeyS)) - if read, err = conn.Read(auth); err != nil { - return - } - if read != iHSLen { - err = fmt.Errorf("remote initiator's handshake has invalid length. expect %v, got %v", iHSLen, read) - return - } - clogger.Debugf("received initiator handshake (from %v):\n%v", hexkey(remotePubKeyS), hexkey(auth)) - // we are listening connection. we are responders in the handshake. - // Extract info from the authentication. The initiator starts by sending us a handshake that we need to respond to. - // so we read auth message first, then respond - var response []byte - if response, recNonce, initNonce, randomPrivKey, remoteRandomPubKey, err = respondToHandshake(auth, prvKey, remotePubKeyS, sessionToken); err != nil { - return - } - clogger.Debugf("receiver-nonce: %v", hexkey(recNonce)) - clogger.Debugf("receiver-random-priv-key: %v", hexkey(crypto.FromECDSA(randomPrivKey))) - if _, err = conn.Write(response); err != nil { - return - } - clogger.Debugf("receiver handshake (sent to %v):\n%v", hexkey(remotePubKeyS), hexkey(response)) + if sessionToken != nil { + clogger.Debugf("session-token: %v", hexkey(sessionToken)) } - return newSession(initiator, initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) -} -/* -ImportPublicKey creates a 512 bit *ecsda.PublicKey from a byte slice. It accepts the simple 64 byte uncompressed format or the 65 byte format given by calling elliptic.Marshal on the EC point represented by the key. Any other length will result in an invalid public key error. -*/ -func ImportPublicKey(pubKey []byte) (pubKeyEC *ecdsa.PublicKey, err error) { - var pubKey65 []byte - switch len(pubKey) { - case 64: - pubKey65 = append([]byte{0x04}, pubKey...) - case 65: - pubKey65 = pubKey - default: - return nil, fmt.Errorf("invalid public key length %v (expect 64/65)", len(pubKey)) + clogger.Debugf("initiator-nonce: %v", hexkey(initNonce)) + clogger.Debugf("initiator-random-private-key: %v", hexkey(crypto.FromECDSA(randomPrivKey))) + randomPublicKeyS, _ := exportPublicKey(&randomPrivKey.PublicKey) + clogger.Debugf("initiator-random-public-key: %v", hexkey(randomPublicKeyS)) + if _, err = conn.Write(auth); err != nil { + return nil, err } - return crypto.ToECDSAPub(pubKey65), nil -} + clogger.Debugf("initiator handshake: %v", hexkey(auth)) -/* -ExportPublicKey exports a *ecdsa.PublicKey into a byte slice using a simple 64-byte format. and is used for simple serialisation in network communication -*/ -func ExportPublicKey(pubKeyEC *ecdsa.PublicKey) (pubKey []byte, err error) { - if pubKeyEC == nil { - return nil, fmt.Errorf("no ECDSA public key given") + response := make([]byte, rHSLen) + if _, err = io.ReadFull(conn, response); err != nil { + return nil, err + } + recNonce, remoteRandomPubKey, _, err := completeHandshake(response, prvKey) + if err != nil { + return nil, err } - return crypto.FromECDSAPub(pubKeyEC)[1:], nil -} - -/* startHandshake is called by if the node is the initiator of the connection. -The caller provides the public key of the peer as conjuctured from lookup based on IP:port, given as user input or proven by signatures. The caller must have access to persistant information about the peers, and pass the previous session token as an argument to cryptoId. + clogger.Debugf("receiver-nonce: %v", hexkey(recNonce)) + remoteRandomPubKeyS, _ := exportPublicKey(remoteRandomPubKey) + clogger.Debugf("receiver-random-public-key: %v", hexkey(remoteRandomPubKeyS)) + return newSession(initNonce, recNonce, randomPrivKey, remoteRandomPubKey) +} -The first return value is the auth message that is to be sent out to the remote receiver. -*/ -func startHandshake(prvKey *ecdsa.PrivateKey, remotePubKeyS, sessionToken []byte) (auth []byte, initNonce []byte, randomPrvKey *ecdsa.PrivateKey, remotePubKey *ecdsa.PublicKey, err error) { +// authMsg creates the initiator handshake. +func authMsg(prvKey *ecdsa.PrivateKey, remotePubKeyS, sessionToken []byte) ( + auth, initNonce []byte, + randomPrvKey *ecdsa.PrivateKey, + err error, +) { // session init, common to both parties - if remotePubKey, err = ImportPublicKey(remotePubKeyS); err != nil { + remotePubKey, err := importPublicKey(remotePubKeyS) + if err != nil { return } @@ -203,20 +123,18 @@ func startHandshake(prvKey *ecdsa.PrivateKey, remotePubKeyS, sessionToken []byte //E(remote-pubk, S(ecdhe-random, ecdh-shared-secret^nonce) || H(ecdhe-random-pubk) || pubk || nonce || 0x0) // E(remote-pubk, S(ecdhe-random, token^nonce) || H(ecdhe-random-pubk) || pubk || nonce || 0x1) // allocate msgLen long message, - var msg []byte = make([]byte, msgLen) - initNonce = msg[msgLen-shaLen-1 : msgLen-1] - fmt.Printf("init-nonce: ") - if _, err = nonceF(initNonce); err != nil { + var msg []byte = make([]byte, authMsgLen) + initNonce = msg[authMsgLen-shaLen-1 : authMsgLen-1] + if _, err = rand.Read(initNonce); err != nil { return } // create known message // ecdh-shared-secret^nonce for new peers // token^nonce for old peers - var sharedSecret = Xor(sessionToken, initNonce) + var sharedSecret = xor(sessionToken, initNonce) // generate random keypair to use for signing - fmt.Printf("init-random-ecdhe-private-key: ") - if randomPrvKey, err = keyF(); err != nil { + if randomPrvKey, err = crypto.GenerateKey(); err != nil { return } // sign shared secret (message known to both parties): shared-secret @@ -232,11 +150,11 @@ func startHandshake(prvKey *ecdsa.PrivateKey, remotePubKeyS, sessionToken []byte copy(msg, signature) // copy signed-shared-secret // H(ecdhe-random-pubk) var randomPubKey64 []byte - if randomPubKey64, err = ExportPublicKey(&randomPrvKey.PublicKey); err != nil { + if randomPubKey64, err = exportPublicKey(&randomPrvKey.PublicKey); err != nil { return } var pubKey64 []byte - if pubKey64, err = ExportPublicKey(&prvKey.PublicKey); err != nil { + if pubKey64, err = exportPublicKey(&prvKey.PublicKey); err != nil { return } copy(msg[sigLen:sigLen+shaLen], crypto.Sha3(randomPubKey64)) @@ -244,36 +162,98 @@ func startHandshake(prvKey *ecdsa.PrivateKey, remotePubKeyS, sessionToken []byte copy(msg[sigLen+shaLen:sigLen+shaLen+pubLen], pubKey64) // nonce is already in the slice // stick tokenFlag byte to the end - msg[msgLen-1] = tokenFlag + msg[authMsgLen-1] = tokenFlag // encrypt using remote-pubk // auth = eciesEncrypt(remote-pubk, msg) - if auth, err = crypto.Encrypt(remotePubKey, msg); err != nil { return } - return } -/* -respondToHandshake is called by peer if it accepted (but not initiated) the connection from the remote. It is passed the initiator handshake received, the public key and session token belonging to the remote initiator. - -The first return value is the authentication response (aka receiver handshake) that is to be sent to the remote initiator. -*/ -func respondToHandshake(auth []byte, prvKey *ecdsa.PrivateKey, remotePubKeyS, sessionToken []byte) (authResp []byte, respNonce []byte, initNonce []byte, randomPrivKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey, err error) { +// completeHandshake is called when the initiator receives an +// authentication response (aka receiver handshake). It completes the +// handshake by reading off parameters the remote peer provides needed +// to set up the secure session. +func completeHandshake(auth []byte, prvKey *ecdsa.PrivateKey) ( + respNonce []byte, + remoteRandomPubKey *ecdsa.PublicKey, + tokenFlag bool, + err error, +) { var msg []byte - var remotePubKey *ecdsa.PublicKey - if remotePubKey, err = ImportPublicKey(remotePubKeyS); err != nil { + // they prove that msg is meant for me, + // I prove I possess private key if i can read it + if msg, err = crypto.Decrypt(prvKey, auth); err != nil { return } + respNonce = msg[pubLen : pubLen+shaLen] + var remoteRandomPubKeyS = msg[:pubLen] + if remoteRandomPubKey, err = importPublicKey(remoteRandomPubKeyS); err != nil { + return + } + if msg[authRespLen-1] == 0x01 { + tokenFlag = true + } + return +} + +// inboundEncHandshake negotiates a session token on conn. +// it should be called on the listening side of the connection. +// +// privateKey is the local client's private key +// sessionToken is the token from a previous session with this node. +func inboundEncHandshake(conn io.ReadWriter, prvKey *ecdsa.PrivateKey, sessionToken []byte) ( + token, remotePubKey []byte, + err error, +) { + // we are listening connection. we are responders in the + // handshake. Extract info from the authentication. The initiator + // starts by sending us a handshake that we need to respond to. so + // we read auth message first, then respond. + auth := make([]byte, iHSLen) + if _, err := io.ReadFull(conn, auth); err != nil { + return nil, nil, err + } + response, recNonce, initNonce, remotePubKey, randomPrivKey, remoteRandomPubKey, err := authResp(auth, sessionToken, prvKey) + if err != nil { + return nil, nil, err + } + clogger.Debugf("receiver-nonce: %v", hexkey(recNonce)) + clogger.Debugf("receiver-random-priv-key: %v", hexkey(crypto.FromECDSA(randomPrivKey))) + if _, err = conn.Write(response); err != nil { + return nil, nil, err + } + clogger.Debugf("receiver handshake:\n%v", hexkey(response)) + token, err = newSession(initNonce, recNonce, randomPrivKey, remoteRandomPubKey) + return token, remotePubKey, err +} + +// authResp is called by peer if it accepted (but not +// initiated) the connection from the remote. It is passed the initiator +// handshake received and the session token belonging to the +// remote initiator. +// +// The first return value is the authentication response (aka receiver +// handshake) that is to be sent to the remote initiator. +func authResp(auth, sessionToken []byte, prvKey *ecdsa.PrivateKey) ( + authResp, respNonce, initNonce, remotePubKeyS []byte, + randomPrivKey *ecdsa.PrivateKey, + remoteRandomPubKey *ecdsa.PublicKey, + err error, +) { // they prove that msg is meant for me, // I prove I possess private key if i can read it - if msg, err = crypto.Decrypt(prvKey, auth); err != nil { + msg, err := crypto.Decrypt(prvKey, auth) + if err != nil { return } + remotePubKeyS = msg[sigLen+shaLen : sigLen+shaLen+pubLen] + remotePubKey, _ := importPublicKey(remotePubKeyS) + var tokenFlag byte if sessionToken == nil { // no session token found means we need to generate shared secret. @@ -289,42 +269,42 @@ func respondToHandshake(auth []byte, prvKey *ecdsa.PrivateKey, remotePubKeyS, se } // the initiator nonce is read off the end of the message - initNonce = msg[msgLen-shaLen-1 : msgLen-1] - // I prove that i own prv key (to derive shared secret, and read nonce off encrypted msg) and that I own shared secret - // they prove they own the private key belonging to ecdhe-random-pubk - // we can now reconstruct the signed message and recover the peers pubkey - var signedMsg = Xor(sessionToken, initNonce) + initNonce = msg[authMsgLen-shaLen-1 : authMsgLen-1] + // I prove that i own prv key (to derive shared secret, and read + // nonce off encrypted msg) and that I own shared secret they + // prove they own the private key belonging to ecdhe-random-pubk + // we can now reconstruct the signed message and recover the peers + // pubkey + var signedMsg = xor(sessionToken, initNonce) var remoteRandomPubKeyS []byte if remoteRandomPubKeyS, err = secp256k1.RecoverPubkey(signedMsg, msg[:sigLen]); err != nil { return } // convert to ECDSA standard - if remoteRandomPubKey, err = ImportPublicKey(remoteRandomPubKeyS); err != nil { + if remoteRandomPubKey, err = importPublicKey(remoteRandomPubKeyS); err != nil { return } // now we find ourselves a long task too, fill it random - var resp = make([]byte, resLen) + var resp = make([]byte, authRespLen) // generate shaLen long nonce respNonce = resp[pubLen : pubLen+shaLen] - fmt.Printf("rec-nonce: ") - if _, err = nonceF(respNonce); err != nil { + if _, err = rand.Read(respNonce); err != nil { return } // generate random keypair for session - fmt.Printf("rec-random-ecdhe-private-key: ") - if randomPrivKey, err = keyF(); err != nil { + if randomPrivKey, err = crypto.GenerateKey(); err != nil { return } // responder auth message // E(remote-pubk, ecdhe-random-pubk || nonce || 0x0) var randomPubKeyS []byte - if randomPubKeyS, err = ExportPublicKey(&randomPrivKey.PublicKey); err != nil { + if randomPubKeyS, err = exportPublicKey(&randomPrivKey.PublicKey); err != nil { return } copy(resp[:pubLen], randomPubKeyS) // nonce is already in the slice - resp[resLen-1] = tokenFlag + resp[authRespLen-1] = tokenFlag // encrypt using remote-pubk // auth = eciesEncrypt(remote-pubk, msg) @@ -335,70 +315,49 @@ func respondToHandshake(auth []byte, prvKey *ecdsa.PrivateKey, remotePubKeyS, se return } -/* -completeHandshake is called when the initiator receives an authentication response (aka receiver handshake). It completes the handshake by reading off parameters the remote peer provides needed to set up the secure session -*/ -func completeHandshake(auth []byte, prvKey *ecdsa.PrivateKey) (respNonce []byte, remoteRandomPubKey *ecdsa.PublicKey, tokenFlag bool, err error) { - var msg []byte - // they prove that msg is meant for me, - // I prove I possess private key if i can read it - if msg, err = crypto.Decrypt(prvKey, auth); err != nil { - return +// newSession is called after the handshake is completed. The +// arguments are values negotiated in the handshake. The return value +// is a new session Token to be remembered for the next time we +// connect with this peer. +func newSession(initNonce, respNonce []byte, privKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey) ([]byte, error) { + // 3) Now we can trust ecdhe-random-pubk to derive new keys + //ecdhe-shared-secret = ecdh.agree(ecdhe-random, remote-ecdhe-random-pubk) + pubKey := ecies.ImportECDSAPublic(remoteRandomPubKey) + dhSharedSecret, err := ecies.ImportECDSA(privKey).GenerateShared(pubKey, sskLen, sskLen) + if err != nil { + return nil, err } + sharedSecret := crypto.Sha3(dhSharedSecret, crypto.Sha3(respNonce, initNonce)) + sessionToken := crypto.Sha3(sharedSecret) + return sessionToken, nil +} - respNonce = msg[pubLen : pubLen+shaLen] - var remoteRandomPubKeyS = msg[:pubLen] - if remoteRandomPubKey, err = ImportPublicKey(remoteRandomPubKeyS); err != nil { - return - } - if msg[resLen-1] == 0x01 { - tokenFlag = true +// importPublicKey unmarshals 512 bit public keys. +func importPublicKey(pubKey []byte) (pubKeyEC *ecdsa.PublicKey, err error) { + var pubKey65 []byte + switch len(pubKey) { + case 64: + // add 'uncompressed key' flag + pubKey65 = append([]byte{0x04}, pubKey...) + case 65: + pubKey65 = pubKey + default: + return nil, fmt.Errorf("invalid public key length %v (expect 64/65)", len(pubKey)) } - return + return crypto.ToECDSAPub(pubKey65), nil } -/* -newSession is called after the handshake is completed. The arguments are values negotiated in the handshake and the return value is a new session : a new session Token to be remembered for the next time we connect with this peer. And a MsgReadWriter that implements an encrypted and authenticated connection with key material obtained from the crypto handshake key exchange -*/ -func newSession(initiator bool, initNonce, respNonce, auth []byte, privKey *ecdsa.PrivateKey, remoteRandomPubKey *ecdsa.PublicKey) (sessionToken []byte, rw *secretRW, err error) { - // 3) Now we can trust ecdhe-random-pubk to derive new keys - //ecdhe-shared-secret = ecdh.agree(ecdhe-random, remote-ecdhe-random-pubk) - var dhSharedSecret []byte - pubKey := ecies.ImportECDSAPublic(remoteRandomPubKey) - if dhSharedSecret, err = ecies.ImportECDSA(privKey).GenerateShared(pubKey, sskLen, sskLen); err != nil { - return +func exportPublicKey(pubKeyEC *ecdsa.PublicKey) (pubKey []byte, err error) { + if pubKeyEC == nil { + return nil, fmt.Errorf("no ECDSA public key given") } - var sharedSecret = crypto.Sha3(append(dhSharedSecret, crypto.Sha3(append(respNonce, initNonce...))...)) - sessionToken = crypto.Sha3(sharedSecret) - var aesSecret = crypto.Sha3(append(dhSharedSecret, sharedSecret...)) - var macSecret = crypto.Sha3(append(dhSharedSecret, aesSecret...)) - var egressMac, ingressMac []byte - if initiator { - egressMac = Xor(macSecret, respNonce) - ingressMac = Xor(macSecret, initNonce) - } else { - egressMac = Xor(macSecret, initNonce) - ingressMac = Xor(macSecret, respNonce) - } - rw = &secretRW{ - aesSecret: aesSecret, - macSecret: macSecret, - egressMac: egressMac, - ingressMac: ingressMac, - } - clogger.Debugf("aes-secret: %v", hexkey(aesSecret)) - clogger.Debugf("mac-secret: %v", hexkey(macSecret)) - clogger.Debugf("egress-mac: %v", hexkey(egressMac)) - clogger.Debugf("ingress-mac: %v", hexkey(ingressMac)) - return + return crypto.FromECDSAPub(pubKeyEC)[1:], nil } -// TODO: optimisation -// should use cipher.xorBytes from crypto/cipher/xor.go for fast xor -func Xor(one, other []byte) (xor []byte) { +func xor(one, other []byte) (xor []byte) { xor = make([]byte, len(one)) for i := 0; i < len(one); i++ { xor[i] = one[i] ^ other[i] } - return + return xor } diff --git a/p2p/crypto_test.go b/p2p/crypto_test.go index a4bf14ba64..0a9d49f962 100644 --- a/p2p/crypto_test.go +++ b/p2p/crypto_test.go @@ -3,10 +3,9 @@ package p2p import ( "bytes" "crypto/ecdsa" - "fmt" + "crypto/rand" "net" "testing" - "time" "github.com/ethereum/go-ethereum/crypto" "github.com/obscuren/ecies" @@ -16,7 +15,7 @@ func TestPublicKeyEncoding(t *testing.T) { prv0, _ := crypto.GenerateKey() // = ecdsa.GenerateKey(crypto.S256(), rand.Reader) pub0 := &prv0.PublicKey pub0s := crypto.FromECDSAPub(pub0) - pub1, err := ImportPublicKey(pub0s) + pub1, err := importPublicKey(pub0s) if err != nil { t.Errorf("%v", err) } @@ -24,18 +23,18 @@ func TestPublicKeyEncoding(t *testing.T) { if eciesPub1 == nil { t.Errorf("invalid ecdsa public key") } - pub1s, err := ExportPublicKey(pub1) + pub1s, err := exportPublicKey(pub1) if err != nil { t.Errorf("%v", err) } if len(pub1s) != 64 { t.Errorf("wrong length expect 64, got", len(pub1s)) } - pub2, err := ImportPublicKey(pub1s) + pub2, err := importPublicKey(pub1s) if err != nil { t.Errorf("%v", err) } - pub2s, err := ExportPublicKey(pub2) + pub2s, err := exportPublicKey(pub2) if err != nil { t.Errorf("%v", err) } @@ -69,95 +68,53 @@ func TestSharedSecret(t *testing.T) { } func TestCryptoHandshake(t *testing.T) { - testCryptoHandshakeWithGen(false, t) + testCryptoHandshake(newkey(), newkey(), nil, t) } -func TestTokenCryptoHandshake(t *testing.T) { - testCryptoHandshakeWithGen(true, t) -} - -func TestDetCryptoHandshake(t *testing.T) { - defer testlog(t).detach() - tmpkeyF := keyF - keyF = detkeyF - tmpnonceF := nonceF - nonceF = detnonceF - testCryptoHandshakeWithGen(false, t) - keyF = tmpkeyF - nonceF = tmpnonceF -} - -func TestDetTokenCryptoHandshake(t *testing.T) { - defer testlog(t).detach() - tmpkeyF := keyF - keyF = detkeyF - tmpnonceF := nonceF - nonceF = detnonceF - testCryptoHandshakeWithGen(true, t) - keyF = tmpkeyF - nonceF = tmpnonceF -} - -func testCryptoHandshakeWithGen(token bool, t *testing.T) { - fmt.Printf("init-private-key: ") - prv0, err := keyF() - if err != nil { - t.Errorf("%v", err) - return - } - fmt.Printf("rec-private-key: ") - prv1, err := keyF() - if err != nil { - t.Errorf("%v", err) - return - } - var nonce []byte - if token { - fmt.Printf("session-token: ") - nonce = make([]byte, shaLen) - nonceF(nonce) - } - testCryptoHandshake(prv0, prv1, nonce, t) +func TestCryptoHandshakeWithToken(t *testing.T) { + sessionToken := make([]byte, shaLen) + rand.Read(sessionToken) + testCryptoHandshake(newkey(), newkey(), sessionToken, t) } func testCryptoHandshake(prv0, prv1 *ecdsa.PrivateKey, sessionToken []byte, t *testing.T) { var err error - pub0 := &prv0.PublicKey + // pub0 := &prv0.PublicKey pub1 := &prv1.PublicKey - pub0s := crypto.FromECDSAPub(pub0) + // pub0s := crypto.FromECDSAPub(pub0) pub1s := crypto.FromECDSAPub(pub1) // simulate handshake by feeding output to input // initiator sends handshake 'auth' - auth, initNonce, randomPrivKey, _, err := startHandshake(prv0, pub1s, sessionToken) + auth, initNonce, randomPrivKey, err := authMsg(prv0, pub1s, sessionToken) if err != nil { t.Errorf("%v", err) } - fmt.Printf("-> %v\n", hexkey(auth)) + t.Logf("-> %v", hexkey(auth)) // receiver reads auth and responds with response - response, remoteRecNonce, remoteInitNonce, remoteRandomPrivKey, remoteInitRandomPubKey, err := respondToHandshake(auth, prv1, pub0s, sessionToken) + response, remoteRecNonce, remoteInitNonce, _, remoteRandomPrivKey, remoteInitRandomPubKey, err := authResp(auth, sessionToken, prv1) if err != nil { t.Errorf("%v", err) } - fmt.Printf("<- %v\n", hexkey(response)) + t.Logf("<- %v\n", hexkey(response)) // initiator reads receiver's response and the key exchange completes recNonce, remoteRandomPubKey, _, err := completeHandshake(response, prv0) if err != nil { - t.Errorf("%v", err) + t.Errorf("completeHandshake error: %v", err) } // now both parties should have the same session parameters - initSessionToken, initSecretRW, err := newSession(true, initNonce, recNonce, auth, randomPrivKey, remoteRandomPubKey) + initSessionToken, err := newSession(initNonce, recNonce, randomPrivKey, remoteRandomPubKey) if err != nil { - t.Errorf("%v", err) + t.Errorf("newSession error: %v", err) } - recSessionToken, recSecretRW, err := newSession(false, remoteInitNonce, remoteRecNonce, auth, remoteRandomPrivKey, remoteInitRandomPubKey) + recSessionToken, err := newSession(remoteInitNonce, remoteRecNonce, remoteRandomPrivKey, remoteInitRandomPubKey) if err != nil { - t.Errorf("%v", err) + t.Errorf("newSession error: %v", err) } // fmt.Printf("\nauth (%v) %x\n\nresp (%v) %x\n\n", len(auth), auth, len(response), response) @@ -173,76 +130,38 @@ func testCryptoHandshake(prv0, prv1 *ecdsa.PrivateKey, sessionToken []byte, t *t if !bytes.Equal(initSessionToken, recSessionToken) { t.Errorf("session tokens do not match") } - // aesSecret, macSecret, egressMac, ingressMac - if !bytes.Equal(initSecretRW.aesSecret, recSecretRW.aesSecret) { - t.Errorf("AES secrets do not match") - } - if !bytes.Equal(initSecretRW.macSecret, recSecretRW.macSecret) { - t.Errorf("macSecrets do not match") - } - if !bytes.Equal(initSecretRW.egressMac, recSecretRW.ingressMac) { - t.Errorf("initiator's egressMac do not match receiver's ingressMac") - } - if !bytes.Equal(initSecretRW.ingressMac, recSecretRW.egressMac) { - t.Errorf("initiator's inressMac do not match receiver's egressMac") - } - } -func TestPeersHandshake(t *testing.T) { +func TestHandshake(t *testing.T) { defer testlog(t).detach() - var err error - // var sessionToken []byte - prv0, _ := crypto.GenerateKey() // = ecdsa.GenerateKey(crypto.S256(), rand.Reader) - pub0 := &prv0.PublicKey - prv1, _ := crypto.GenerateKey() - pub1 := &prv1.PublicKey - - prv0s := crypto.FromECDSA(prv0) - pub0s := crypto.FromECDSAPub(pub0) - prv1s := crypto.FromECDSA(prv1) - pub1s := crypto.FromECDSAPub(pub1) - - conn1, conn2 := net.Pipe() - initiator := newPeer(conn1, []Protocol{}, nil) - receiver := newPeer(conn2, []Protocol{}, nil) - initiator.dialAddr = &peerAddr{IP: net.ParseIP("1.2.3.4"), Port: 2222, Pubkey: pub1s[1:]} - initiator.privateKey = prv0s - // this is cheating. identity of initiator/dialler not available to listener/receiver - // its public key should be looked up based on IP address - receiver.identity = &peerId{nil, pub0s} - receiver.privateKey = prv1s - - initiator.pubkeyHook = func(*peerAddr) error { return nil } - receiver.pubkeyHook = func(*peerAddr) error { return nil } + prv0, _ := crypto.GenerateKey() + prv1, _ := crypto.GenerateKey() + pub0s, _ := exportPublicKey(&prv0.PublicKey) + pub1s, _ := exportPublicKey(&prv1.PublicKey) + rw0, rw1 := net.Pipe() + tokens := make(chan []byte) - initiator.cryptoHandshake = true - receiver.cryptoHandshake = true - errc0 := make(chan error, 1) - errc1 := make(chan error, 1) go func() { - _, err := initiator.loop() - errc0 <- err + token, err := outboundEncHandshake(rw0, prv0, pub1s, nil) + if err != nil { + t.Errorf("outbound side error: %v", err) + } + tokens <- token }() go func() { - _, err := receiver.loop() - errc1 <- err + token, remotePubkey, err := inboundEncHandshake(rw1, prv1, nil) + if err != nil { + t.Errorf("inbound side error: %v", err) + } + if !bytes.Equal(remotePubkey, pub0s) { + t.Errorf("inbound side returned wrong remote pubkey\n got: %x\n want: %x", remotePubkey, pub0s) + } + tokens <- token }() - ready := make(chan bool) - go func() { - <-initiator.cryptoReady - <-receiver.cryptoReady - close(ready) - }() - timeout := time.After(10 * time.Second) - select { - case <-ready: - case <-timeout: - t.Errorf("crypto handshake hanging for too long") - case err = <-errc0: - t.Errorf("peer 0 quit with error: %v", err) - case err = <-errc1: - t.Errorf("peer 1 quit with error: %v", err) + + t1, t2 := <-tokens, <-tokens + if !bytes.Equal(t1, t2) { + t.Error("session token mismatch") } } diff --git a/p2p/message.go b/p2p/message.go index daf2bf05c1..6521d09c24 100644 --- a/p2p/message.go +++ b/p2p/message.go @@ -1,6 +1,7 @@ package p2p import ( + "bufio" "bytes" "encoding/binary" "errors" @@ -8,7 +9,10 @@ import ( "io" "io/ioutil" "math/big" + "net" + "sync" "sync/atomic" + "time" "github.com/ethereum/go-ethereum/ethutil" "github.com/ethereum/go-ethereum/rlp" @@ -74,11 +78,14 @@ type MsgWriter interface { // WriteMsg sends a message. It will block until the message's // Payload has been consumed by the other end. // - // Note that messages can be sent only once. + // Note that messages can be sent only once because their + // payload reader is drained. WriteMsg(Msg) error } // MsgReadWriter provides reading and writing of encoded messages. +// Implementations should ensure that ReadMsg and WriteMsg can be +// called simultaneously from multiple goroutines. type MsgReadWriter interface { MsgReader MsgWriter @@ -90,8 +97,45 @@ func EncodeMsg(w MsgWriter, code uint64, data ...interface{}) error { return w.WriteMsg(NewMsg(code, data...)) } +// frameRW is a MsgReadWriter that reads and writes devp2p message frames. +// As required by the interface, ReadMsg and WriteMsg can be called from +// multiple goroutines. +type frameRW struct { + net.Conn // make Conn methods available. be careful. + bufconn *bufio.ReadWriter + + // this channel is used to 'lend' bufconn to a caller of ReadMsg + // until the message payload has been consumed. the channel + // receives a value when EOF is reached on the payload, unblocking + // a pending call to ReadMsg. + rsync chan struct{} + + // this mutex guards writes to bufconn. + writeMu sync.Mutex +} + +func newFrameRW(conn net.Conn, timeout time.Duration) *frameRW { + rsync := make(chan struct{}, 1) + rsync <- struct{}{} + return &frameRW{ + Conn: conn, + bufconn: bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn)), + rsync: rsync, + } +} + var magicToken = []byte{34, 64, 8, 145} +func (rw *frameRW) WriteMsg(msg Msg) error { + rw.writeMu.Lock() + defer rw.writeMu.Unlock() + rw.SetWriteDeadline(time.Now().Add(msgWriteTimeout)) + if err := writeMsg(rw.bufconn, msg); err != nil { + return err + } + return rw.bufconn.Flush() +} + func writeMsg(w io.Writer, msg Msg) error { // TODO: handle case when Size + len(code) + len(listhdr) overflows uint32 code := ethutil.Encode(uint32(msg.Code)) @@ -120,12 +164,16 @@ func makeListHeader(length uint32) []byte { return append([]byte{lenb}, enc...) } -// readMsg reads a message header from r. -// It takes an rlp.ByteReader to ensure that the decoding doesn't buffer. -func readMsg(r rlp.ByteReader) (msg Msg, err error) { +func (rw *frameRW) ReadMsg() (msg Msg, err error) { + <-rw.rsync // wait until bufconn is ours + + // this read timeout applies also to the payload. + // TODO: proper read timeout + rw.SetReadDeadline(time.Now().Add(msgReadTimeout)) + // read magic and payload size start := make([]byte, 8) - if _, err = io.ReadFull(r, start); err != nil { + if _, err = io.ReadFull(rw.bufconn, start); err != nil { return msg, newPeerError(errRead, "%v", err) } if !bytes.HasPrefix(start, magicToken) { @@ -134,17 +182,33 @@ func readMsg(r rlp.ByteReader) (msg Msg, err error) { size := binary.BigEndian.Uint32(start[4:]) // decode start of RLP message to get the message code - posr := &postrack{r, 0} + posr := &postrack{rw.bufconn, 0} s := rlp.NewStream(posr) if _, err := s.List(); err != nil { return msg, err } - code, err := s.Uint() + msg.Code, err = s.Uint() if err != nil { return msg, err } - payloadsize := size - posr.p - return Msg{code, payloadsize, io.LimitReader(r, int64(payloadsize))}, nil + msg.Size = size - posr.p + + if msg.Size <= wholePayloadSize { + // msg is small, read all of it and move on to the next message. + pbuf := make([]byte, msg.Size) + if _, err := io.ReadFull(rw.bufconn, pbuf); err != nil { + return msg, err + } + rw.rsync <- struct{}{} // bufconn is available again + msg.Payload = bytes.NewReader(pbuf) + } else { + // lend bufconn to the caller until it has + // consumed the payload. eofSignal will send a value + // on rw.rsync when EOF is reached. + pr := &eofSignal{rw.bufconn, msg.Size, rw.rsync} + msg.Payload = pr + } + return msg, nil } // postrack wraps an rlp.ByteReader with a position counter. @@ -167,6 +231,39 @@ func (r *postrack) ReadByte() (byte, error) { return b, err } +// eofSignal wraps a reader with eof signaling. the eof channel is +// closed when the wrapped reader returns an error or when count bytes +// have been read. +type eofSignal struct { + wrapped io.Reader + count uint32 // number of bytes left + eof chan<- struct{} +} + +// note: when using eofSignal to detect whether a message payload +// has been read, Read might not be called for zero sized messages. +func (r *eofSignal) Read(buf []byte) (int, error) { + if r.count == 0 { + if r.eof != nil { + r.eof <- struct{}{} + r.eof = nil + } + return 0, io.EOF + } + + max := len(buf) + if int(r.count) < len(buf) { + max = int(r.count) + } + n, err := r.wrapped.Read(buf[:max]) + r.count -= uint32(n) + if (err != nil || r.count == 0) && r.eof != nil { + r.eof <- struct{}{} // tell Peer that msg has been consumed + r.eof = nil + } + return n, err +} + // MsgPipe creates a message pipe. Reads on one end are matched // with writes on the other. The pipe is full-duplex, both ends // implement MsgReadWriter. @@ -198,7 +295,7 @@ type MsgPipeRW struct { func (p *MsgPipeRW) WriteMsg(msg Msg) error { if atomic.LoadInt32(p.closed) == 0 { consumed := make(chan struct{}, 1) - msg.Payload = &eofSignal{msg.Payload, int64(msg.Size), consumed} + msg.Payload = &eofSignal{msg.Payload, msg.Size, consumed} select { case p.w <- msg: if msg.Size > 0 { diff --git a/p2p/message_test.go b/p2p/message_test.go index 5cde9abf5b..4b94ebb5f2 100644 --- a/p2p/message_test.go +++ b/p2p/message_test.go @@ -3,12 +3,11 @@ package p2p import ( "bytes" "fmt" + "io" "io/ioutil" "runtime" "testing" "time" - - "github.com/ethereum/go-ethereum/ethutil" ) func TestNewMsg(t *testing.T) { @@ -26,51 +25,51 @@ func TestNewMsg(t *testing.T) { } } -func TestEncodeDecodeMsg(t *testing.T) { - msg := NewMsg(3, 1, "000") - buf := new(bytes.Buffer) - if err := writeMsg(buf, msg); err != nil { - t.Fatalf("encodeMsg error: %v", err) - } - // t.Logf("encoded: %x", buf.Bytes()) +// func TestEncodeDecodeMsg(t *testing.T) { +// msg := NewMsg(3, 1, "000") +// buf := new(bytes.Buffer) +// if err := writeMsg(buf, msg); err != nil { +// t.Fatalf("encodeMsg error: %v", err) +// } +// // t.Logf("encoded: %x", buf.Bytes()) - decmsg, err := readMsg(buf) - if err != nil { - t.Fatalf("readMsg error: %v", err) - } - if decmsg.Code != 3 { - t.Errorf("incorrect code %d, want %d", decmsg.Code, 3) - } - if decmsg.Size != 5 { - t.Errorf("incorrect size %d, want %d", decmsg.Size, 5) - } +// decmsg, err := readMsg(buf) +// if err != nil { +// t.Fatalf("readMsg error: %v", err) +// } +// if decmsg.Code != 3 { +// t.Errorf("incorrect code %d, want %d", decmsg.Code, 3) +// } +// if decmsg.Size != 5 { +// t.Errorf("incorrect size %d, want %d", decmsg.Size, 5) +// } - var data struct { - I uint - S string - } - if err := decmsg.Decode(&data); err != nil { - t.Fatalf("Decode error: %v", err) - } - if data.I != 1 { - t.Errorf("incorrect data.I: got %v, expected %d", data.I, 1) - } - if data.S != "000" { - t.Errorf("incorrect data.S: got %q, expected %q", data.S, "000") - } -} +// var data struct { +// I uint +// S string +// } +// if err := decmsg.Decode(&data); err != nil { +// t.Fatalf("Decode error: %v", err) +// } +// if data.I != 1 { +// t.Errorf("incorrect data.I: got %v, expected %d", data.I, 1) +// } +// if data.S != "000" { +// t.Errorf("incorrect data.S: got %q, expected %q", data.S, "000") +// } +// } -func TestDecodeRealMsg(t *testing.T) { - data := ethutil.Hex2Bytes("2240089100000080f87e8002b5457468657265756d282b2b292f5065657220536572766572204f6e652f76302e372e382f52656c656173652f4c696e75782f672b2bc082765fb84086dd80b7aefd6a6d2e3b93f4f300a86bfb6ef7bdc97cb03f793db6bb") - msg, err := readMsg(bytes.NewReader(data)) - if err != nil { - t.Fatalf("unexpected error: %v", err) - } +// func TestDecodeRealMsg(t *testing.T) { +// data := ethutil.Hex2Bytes("2240089100000080f87e8002b5457468657265756d282b2b292f5065657220536572766572204f6e652f76302e372e382f52656c656173652f4c696e75782f672b2bc082765fb84086dd80b7aefd6a6d2e3b93f4f300a86bfb6ef7bdc97cb03f793db6bb") +// msg, err := readMsg(bytes.NewReader(data)) +// if err != nil { +// t.Fatalf("unexpected error: %v", err) +// } - if msg.Code != 0 { - t.Errorf("incorrect code %d, want %d", msg.Code, 0) - } -} +// if msg.Code != 0 { +// t.Errorf("incorrect code %d, want %d", msg.Code, 0) +// } +// } func ExampleMsgPipe() { rw1, rw2 := MsgPipe() @@ -131,3 +130,58 @@ func TestMsgPipeConcurrentClose(t *testing.T) { go rw1.Close() } } + +func TestEOFSignal(t *testing.T) { + rb := make([]byte, 10) + + // empty reader + eof := make(chan struct{}, 1) + sig := &eofSignal{new(bytes.Buffer), 0, eof} + if n, err := sig.Read(rb); n != 0 || err != io.EOF { + t.Errorf("Read returned unexpected values: (%v, %v)", n, err) + } + select { + case <-eof: + default: + t.Error("EOF chan not signaled") + } + + // count before error + eof = make(chan struct{}, 1) + sig = &eofSignal{bytes.NewBufferString("aaaaaaaa"), 4, eof} + if n, err := sig.Read(rb); n != 4 || err != nil { + t.Errorf("Read returned unexpected values: (%v, %v)", n, err) + } + select { + case <-eof: + default: + t.Error("EOF chan not signaled") + } + + // error before count + eof = make(chan struct{}, 1) + sig = &eofSignal{bytes.NewBufferString("aaaa"), 999, eof} + if n, err := sig.Read(rb); n != 4 || err != nil { + t.Errorf("Read returned unexpected values: (%v, %v)", n, err) + } + if n, err := sig.Read(rb); n != 0 || err != io.EOF { + t.Errorf("Read returned unexpected values: (%v, %v)", n, err) + } + select { + case <-eof: + default: + t.Error("EOF chan not signaled") + } + + // no signal if neither occurs + eof = make(chan struct{}, 1) + sig = &eofSignal{bytes.NewBufferString("aaaaaaaaaaaaaaaaaaaaa"), 999, eof} + if n, err := sig.Read(rb); n != 10 || err != nil { + t.Errorf("Read returned unexpected values: (%v, %v)", n, err) + } + select { + case <-eof: + t.Error("unexpected EOF signal") + default: + } +} diff --git a/p2p/peer.go b/p2p/peer.go index e82bca222b..1fa8264a35 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -1,10 +1,6 @@ package p2p import ( - "bufio" - "bytes" - "crypto/ecdsa" - "crypto/rand" "fmt" "io" "io/ioutil" @@ -13,179 +9,118 @@ import ( "sync" "time" - "github.com/ethereum/go-ethereum/crypto" - - "github.com/ethereum/go-ethereum/event" "github.com/ethereum/go-ethereum/logger" + "github.com/ethereum/go-ethereum/p2p/discover" + "github.com/ethereum/go-ethereum/rlp" ) -// peerAddr is the structure of a peer list element. -// It is also a valid net.Addr. -type peerAddr struct { - IP net.IP - Port uint64 - Pubkey []byte // optional -} +const ( + // maximum amount of time allowed for reading a message + msgReadTimeout = 5 * time.Second + // maximum amount of time allowed for writing a message + msgWriteTimeout = 5 * time.Second + // messages smaller than this many bytes will be read at + // once before passing them to a protocol. + wholePayloadSize = 64 * 1024 -func newPeerAddr(addr net.Addr, pubkey []byte) *peerAddr { - n := addr.Network() - if n != "tcp" && n != "tcp4" && n != "tcp6" { - // for testing with non-TCP - return &peerAddr{net.ParseIP("127.0.0.1"), 30303, pubkey} - } - ta := addr.(*net.TCPAddr) - return &peerAddr{ta.IP, uint64(ta.Port), pubkey} -} + disconnectGracePeriod = 2 * time.Second +) -func (d peerAddr) Network() string { - if d.IP.To4() != nil { - return "tcp4" - } else { - return "tcp6" - } -} +const ( + baseProtocolVersion = 2 + baseProtocolLength = uint64(16) + baseProtocolMaxMsgSize = 10 * 1024 * 1024 +) -func (d peerAddr) String() string { - return fmt.Sprintf("%v:%d", d.IP, d.Port) -} +const ( + // devp2p message codes + handshakeMsg = 0x00 + discMsg = 0x01 + pingMsg = 0x02 + pongMsg = 0x03 + getPeersMsg = 0x04 + peersMsg = 0x05 +) -func (d *peerAddr) RlpData() interface{} { - return []interface{}{string(d.IP), d.Port, d.Pubkey} +// handshake is the RLP structure of the protocol handshake. +type handshake struct { + Version uint64 + Name string + Caps []Cap + ListenPort uint64 + NodeID discover.NodeID } -// Peer represents a remote peer. +// Peer represents a connected remote node. type Peer struct { // Peers have all the log methods. // Use them to display messages related to the peer. *logger.Logger - infolock sync.Mutex - identity ClientIdentity - caps []Cap - listenAddr *peerAddr // what remote peer is listening on - dialAddr *peerAddr // non-nil if dialing + infoMu sync.Mutex + name string + caps []Cap - // The mutex protects the connection - // so only one protocol can write at a time. - writeMu sync.Mutex - conn net.Conn - bufconn *bufio.ReadWriter + ourID, remoteID *discover.NodeID + ourName string + + rw *frameRW // These fields maintain the running protocols. - protocols []Protocol - runBaseProtocol bool // for testing - cryptoHandshake bool // for testing - cryptoReady chan struct{} - privateKey []byte + protocols []Protocol + runlock sync.RWMutex // protects running + running map[string]*proto - runlock sync.RWMutex // protects running - running map[string]*proto + protocolHandshakeEnabled bool protoWG sync.WaitGroup protoErr chan error closed chan struct{} disc chan DiscReason - - activity event.TypeMux // for activity events - - slot int // index into Server peer list - - // These fields are kept so base protocol can access them. - // TODO: this should be one or more interfaces - ourID ClientIdentity // client id of the Server - ourListenAddr *peerAddr // listen addr of Server, nil if not listening - newPeerAddr chan<- *peerAddr // tell server about received peers - otherPeers func() []*Peer // should return the list of all peers - pubkeyHook func(*peerAddr) error // called at end of handshake to validate pubkey } // NewPeer returns a peer for testing purposes. -func NewPeer(id ClientIdentity, caps []Cap) *Peer { +func NewPeer(id discover.NodeID, name string, caps []Cap) *Peer { conn, _ := net.Pipe() - peer := newPeer(conn, nil, nil) - peer.setHandshakeInfo(id, nil, caps) - close(peer.closed) + peer := newPeer(conn, nil, "", nil, &id) + peer.setHandshakeInfo(name, caps) + close(peer.closed) // ensures Disconnect doesn't block return peer } -func newServerPeer(server *Server, conn net.Conn, dialAddr *peerAddr) *Peer { - p := newPeer(conn, server.Protocols, dialAddr) - p.ourID = server.Identity - p.newPeerAddr = server.peerConnect - p.otherPeers = server.Peers - p.pubkeyHook = server.verifyPeer - p.runBaseProtocol = true - - // laddr can be updated concurrently by NAT traversal. - // newServerPeer must be called with the server lock held. - if server.laddr != nil { - p.ourListenAddr = newPeerAddr(server.laddr, server.Identity.Pubkey()) - } - return p -} - -func newPeer(conn net.Conn, protocols []Protocol, dialAddr *peerAddr) *Peer { - p := &Peer{ - Logger: logger.NewLogger("P2P " + conn.RemoteAddr().String()), - conn: conn, - dialAddr: dialAddr, - bufconn: bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn)), - protocols: protocols, - running: make(map[string]*proto), - disc: make(chan DiscReason), - protoErr: make(chan error), - closed: make(chan struct{}), - cryptoReady: make(chan struct{}), - } - return p +// ID returns the node's public key. +func (p *Peer) ID() discover.NodeID { + return *p.remoteID } -// Identity returns the client identity of the remote peer. The -// identity can be nil if the peer has not yet completed the -// handshake. -func (p *Peer) Identity() ClientIdentity { - p.infolock.Lock() - defer p.infolock.Unlock() - return p.identity -} - -func (self *Peer) Pubkey() (pubkey []byte) { - self.infolock.Lock() - defer self.infolock.Unlock() - switch { - case self.identity != nil: - pubkey = self.identity.Pubkey()[1:] - case self.dialAddr != nil: - pubkey = self.dialAddr.Pubkey - case self.listenAddr != nil: - pubkey = self.listenAddr.Pubkey - } - return +// Name returns the node name that the remote node advertised. +func (p *Peer) Name() string { + // this needs a lock because the information is part of the + // protocol handshake. + p.infoMu.Lock() + name := p.name + p.infoMu.Unlock() + return name } // Caps returns the capabilities (supported subprotocols) of the remote peer. func (p *Peer) Caps() []Cap { - p.infolock.Lock() - defer p.infolock.Unlock() - return p.caps -} - -func (p *Peer) setHandshakeInfo(id ClientIdentity, laddr *peerAddr, caps []Cap) { - p.infolock.Lock() - p.identity = id - p.listenAddr = laddr - p.caps = caps - p.infolock.Unlock() + // this needs a lock because the information is part of the + // protocol handshake. + p.infoMu.Lock() + caps := p.caps + p.infoMu.Unlock() + return caps } // RemoteAddr returns the remote address of the network connection. func (p *Peer) RemoteAddr() net.Addr { - return p.conn.RemoteAddr() + return p.rw.RemoteAddr() } // LocalAddr returns the local address of the network connection. func (p *Peer) LocalAddr() net.Addr { - return p.conn.LocalAddr() + return p.rw.LocalAddr() } // Disconnect terminates the peer connection with the given reason. @@ -199,201 +134,167 @@ func (p *Peer) Disconnect(reason DiscReason) { // String implements fmt.Stringer. func (p *Peer) String() string { - kind := "inbound" - p.infolock.Lock() - if p.dialAddr != nil { - kind = "outbound" + return fmt.Sprintf("Peer %.8x %v", p.remoteID, p.RemoteAddr()) +} + +func newPeer(conn net.Conn, protocols []Protocol, ourName string, ourID, remoteID *discover.NodeID) *Peer { + logtag := fmt.Sprintf("Peer %.8x %v", remoteID, conn.RemoteAddr()) + return &Peer{ + Logger: logger.NewLogger(logtag), + rw: newFrameRW(conn, msgWriteTimeout), + ourID: ourID, + ourName: ourName, + remoteID: remoteID, + protocols: protocols, + running: make(map[string]*proto), + disc: make(chan DiscReason), + protoErr: make(chan error), + closed: make(chan struct{}), } - p.infolock.Unlock() - return fmt.Sprintf("Peer(%p %v %s)", p, p.conn.RemoteAddr(), kind) } -const ( - // maximum amount of time allowed for reading a message - msgReadTimeout = 5 * time.Second - // maximum amount of time allowed for writing a message - msgWriteTimeout = 5 * time.Second - // messages smaller than this many bytes will be read at - // once before passing them to a protocol. - wholePayloadSize = 64 * 1024 -) - -var ( - inactivityTimeout = 2 * time.Second - disconnectGracePeriod = 2 * time.Second -) +func (p *Peer) setHandshakeInfo(name string, caps []Cap) { + p.infoMu.Lock() + p.name = name + p.caps = caps + p.infoMu.Unlock() +} -func (p *Peer) loop() (reason DiscReason, err error) { - defer p.activity.Stop() +func (p *Peer) run() DiscReason { + var readErr = make(chan error, 1) defer p.closeProtocols() defer close(p.closed) - defer p.conn.Close() + defer p.rw.Close() + + // start the read loop + go func() { readErr <- p.readLoop() }() - var readLoop func(chan<- Msg, chan<- error, <-chan bool) - if p.cryptoHandshake { - if readLoop, err = p.handleCryptoHandshake(); err != nil { - // from here on everything can be encrypted, authenticated - return DiscProtocolError, err // no graceful disconnect + if p.protocolHandshakeEnabled { + if err := writeProtocolHandshake(p.rw, p.ourName, *p.ourID, p.protocols); err != nil { + p.DebugDetailf("Protocol handshake error: %v\n", err) + return DiscProtocolError } - } else { - readLoop = p.readLoop } - // read loop - readMsg := make(chan Msg) - readErr := make(chan error) - readNext := make(chan bool, 1) - protoDone := make(chan struct{}, 1) - go readLoop(readMsg, readErr, readNext) - readNext <- true - - close(p.cryptoReady) - if p.runBaseProtocol { - p.startBaseProtocol() + // wait for an error or disconnect + var reason DiscReason + select { + case err := <-readErr: + // We rely on protocols to abort if there is a write error. It + // might be more robust to handle them here as well. + p.DebugDetailf("Read error: %v\n", err) + reason = DiscNetworkError + case err := <-p.protoErr: + reason = discReasonForError(err) + case reason = <-p.disc: } - -loop: - for { - select { - case msg := <-readMsg: - // a new message has arrived. - var wait bool - if wait, err = p.dispatch(msg, protoDone); err != nil { - p.Errorf("msg dispatch error: %v\n", err) - reason = discReasonForError(err) - break loop - } - if !wait { - // Msg has already been read completely, continue with next message. - readNext <- true - } - p.activity.Post(time.Now()) - case <-protoDone: - // protocol has consumed the message payload, - // we can continue reading from the socket. - readNext <- true - - case err := <-readErr: - // read failed. there is no need to run the - // polite disconnect sequence because the connection - // is probably dead anyway. - // TODO: handle write errors as well - return DiscNetworkError, err - case err = <-p.protoErr: - reason = discReasonForError(err) - break loop - case reason = <-p.disc: - break loop - } + if reason != DiscNetworkError { + p.politeDisconnect(reason) } + p.Debugf("Disconnected: %v\n", reason) + return reason +} - // wait for read loop to return. - close(readNext) - <-readErr - // tell the remote end to disconnect +func (p *Peer) politeDisconnect(reason DiscReason) { done := make(chan struct{}) go func() { - p.conn.SetDeadline(time.Now().Add(disconnectGracePeriod)) - p.writeMsg(NewMsg(discMsg, reason), disconnectGracePeriod) - io.Copy(ioutil.Discard, p.conn) + // send reason + EncodeMsg(p.rw, discMsg, uint(reason)) + // discard any data that might arrive + io.Copy(ioutil.Discard, p.rw) close(done) }() select { case <-done: case <-time.After(disconnectGracePeriod): } - return reason, err } -func (p *Peer) readLoop(msgc chan<- Msg, errc chan<- error, unblock <-chan bool) { - for _ = range unblock { - p.conn.SetReadDeadline(time.Now().Add(msgReadTimeout)) - if msg, err := readMsg(p.bufconn); err != nil { - errc <- err - } else { - msgc <- msg +func (p *Peer) readLoop() error { + if p.protocolHandshakeEnabled { + if err := readProtocolHandshake(p, p.rw); err != nil { + return err } } - close(errc) + for { + msg, err := p.rw.ReadMsg() + if err != nil { + return err + } + if err = p.handle(msg); err != nil { + return err + } + } + return nil } -func (p *Peer) dispatch(msg Msg, protoDone chan struct{}) (wait bool, err error) { - proto, err := p.getProto(msg.Code) - if err != nil { - return false, err - } - if msg.Size <= wholePayloadSize { - // optimization: msg is small enough, read all - // of it and move on to the next message - buf, err := ioutil.ReadAll(msg.Payload) +func (p *Peer) handle(msg Msg) error { + switch { + case msg.Code == pingMsg: + msg.Discard() + go EncodeMsg(p.rw, pongMsg) + case msg.Code == discMsg: + var reason DiscReason + // no need to discard or for error checking, we'll close the + // connection after this. + rlp.Decode(msg.Payload, &reason) + p.Disconnect(DiscRequested) + return discRequestedError(reason) + case msg.Code < baseProtocolLength: + // ignore other base protocol messages + return msg.Discard() + default: + // it's a subprotocol message + proto, err := p.getProto(msg.Code) if err != nil { - return false, err + return fmt.Errorf("msg code out of range: %v", msg.Code) } - msg.Payload = bytes.NewReader(buf) - proto.in <- msg - } else { - wait = true - pr := &eofSignal{msg.Payload, int64(msg.Size), protoDone} - msg.Payload = pr proto.in <- msg } - return wait, nil + return nil } -type readLoop func(chan<- Msg, chan<- error, <-chan bool) - -func (p *Peer) PrivateKey() (prv *ecdsa.PrivateKey, err error) { - if prv = crypto.ToECDSA(p.privateKey); prv == nil { - err = fmt.Errorf("invalid private key") +func readProtocolHandshake(p *Peer, rw MsgReadWriter) error { + // read and handle remote handshake + msg, err := rw.ReadMsg() + if err != nil { + return err } - return -} - -func (p *Peer) handleCryptoHandshake() (loop readLoop, err error) { - // cryptoId is just created for the lifecycle of the handshake - // it is survived by an encrypted readwriter - var initiator bool - var sessionToken []byte - sessionToken = make([]byte, shaLen) - if _, err = rand.Read(sessionToken); err != nil { - return + if msg.Code != handshakeMsg { + return newPeerError(errProtocolBreach, "expected handshake, got %x", msg.Code) } - if p.dialAddr != nil { // this should have its own method Outgoing() bool - initiator = true + if msg.Size > baseProtocolMaxMsgSize { + return newPeerError(errMisc, "message too big") } - - // run on peer - // this bit handles the handshake and creates a secure communications channel with - // var rw *secretRW - var prvKey *ecdsa.PrivateKey - if prvKey, err = p.PrivateKey(); err != nil { - err = fmt.Errorf("unable to access private key for client: %v", err) - return + var hs handshake + if err := msg.Decode(&hs); err != nil { + return err } - // initialise a new secure session - if sessionToken, _, err = NewSecureSession(p.conn, prvKey, p.Pubkey(), sessionToken, initiator); err != nil { - p.Debugf("unable to setup secure session: %v", err) - return + // validate handshake info + if hs.Version != baseProtocolVersion { + return newPeerError(errP2PVersionMismatch, "required version %d, received %d\n", + baseProtocolVersion, hs.Version) } - loop = func(msg chan<- Msg, err chan<- error, next <-chan bool) { - // this is the readloop :) + if hs.NodeID == *p.remoteID { + return newPeerError(errPubkeyForbidden, "node ID mismatch") } - return + // TODO: remove Caps with empty name + p.setHandshakeInfo(hs.Name, hs.Caps) + p.startSubprotocols(hs.Caps) + return nil } -func (p *Peer) startBaseProtocol() { - p.runlock.Lock() - defer p.runlock.Unlock() - p.running[""] = p.startProto(0, Protocol{ - Length: baseProtocolLength, - Run: runBaseProtocol, - }) +func writeProtocolHandshake(w MsgWriter, name string, id discover.NodeID, ps []Protocol) error { + var caps []interface{} + for _, proto := range ps { + caps = append(caps, proto.cap()) + } + return EncodeMsg(w, handshakeMsg, baseProtocolVersion, name, caps, 0, id) } // startProtocols starts matching named subprotocols. func (p *Peer) startSubprotocols(caps []Cap) { sort.Sort(capsByName(caps)) - p.runlock.Lock() defer p.runlock.Unlock() offset := baseProtocolLength @@ -412,20 +313,22 @@ outer: } func (p *Peer) startProto(offset uint64, impl Protocol) *proto { + p.DebugDetailf("Starting protocol %s/%d\n", impl.Name, impl.Version) rw := &proto{ + name: impl.Name, in: make(chan Msg), offset: offset, maxcode: impl.Length, - peer: p, + w: p.rw, } p.protoWG.Add(1) go func() { err := impl.Run(p, rw) if err == nil { - p.Infof("protocol %q returned", impl.Name) + p.DebugDetailf("Protocol %s/%d returned\n", impl.Name, impl.Version) err = newPeerError(errMisc, "protocol returned") } else { - p.Errorf("protocol %q error: %v\n", impl.Name, err) + p.DebugDetailf("Protocol %s/%d error: %v\n", impl.Name, impl.Version, err) } select { case p.protoErr <- err: @@ -459,6 +362,7 @@ func (p *Peer) closeProtocols() { } // writeProtoMsg sends the given message on behalf of the given named protocol. +// this exists because of Server.Broadcast. func (p *Peer) writeProtoMsg(protoName string, msg Msg) error { p.runlock.RLock() proto, ok := p.running[protoName] @@ -470,25 +374,14 @@ func (p *Peer) writeProtoMsg(protoName string, msg Msg) error { return newPeerError(errInvalidMsgCode, "code %x is out of range for protocol %q", msg.Code, protoName) } msg.Code += proto.offset - return p.writeMsg(msg, msgWriteTimeout) -} - -// writeMsg writes a message to the connection. -func (p *Peer) writeMsg(msg Msg, timeout time.Duration) error { - p.writeMu.Lock() - defer p.writeMu.Unlock() - p.conn.SetWriteDeadline(time.Now().Add(timeout)) - if err := writeMsg(p.bufconn, msg); err != nil { - return newPeerError(errWrite, "%v", err) - } - return p.bufconn.Flush() + return p.rw.WriteMsg(msg) } type proto struct { name string in chan Msg maxcode, offset uint64 - peer *Peer + w MsgWriter } func (rw *proto) WriteMsg(msg Msg) error { @@ -496,11 +389,7 @@ func (rw *proto) WriteMsg(msg Msg) error { return newPeerError(errInvalidMsgCode, "not handled") } msg.Code += rw.offset - return rw.peer.writeMsg(msg, msgWriteTimeout) -} - -func (rw *proto) EncodeMsg(code uint64, data ...interface{}) error { - return rw.WriteMsg(NewMsg(code, data...)) + return rw.w.WriteMsg(msg) } func (rw *proto) ReadMsg() (Msg, error) { @@ -511,26 +400,3 @@ func (rw *proto) ReadMsg() (Msg, error) { msg.Code -= rw.offset return msg, nil } - -// eofSignal wraps a reader with eof signaling. the eof channel is -// closed when the wrapped reader returns an error or when count bytes -// have been read. -// -type eofSignal struct { - wrapped io.Reader - count int64 - eof chan<- struct{} -} - -// note: when using eofSignal to detect whether a message payload -// has been read, Read might not be called for zero sized messages. - -func (r *eofSignal) Read(buf []byte) (int, error) { - n, err := r.wrapped.Read(buf) - r.count -= int64(n) - if (err != nil || r.count <= 0) && r.eof != nil { - r.eof <- struct{}{} // tell Peer that msg has been consumed - r.eof = nil - } - return n, err -} diff --git a/p2p/peer_error.go b/p2p/peer_error.go index 0eb7ec838d..9133768f90 100644 --- a/p2p/peer_error.go +++ b/p2p/peer_error.go @@ -12,7 +12,6 @@ const ( errInvalidMsgCode errInvalidMsg errP2PVersionMismatch - errPubkeyMissing errPubkeyInvalid errPubkeyForbidden errProtocolBreach @@ -22,20 +21,19 @@ const ( ) var errorToString = map[int]string{ - errMagicTokenMismatch: "Magic token mismatch", - errRead: "Read error", - errWrite: "Write error", - errMisc: "Misc error", - errInvalidMsgCode: "Invalid message code", - errInvalidMsg: "Invalid message", + errMagicTokenMismatch: "magic token mismatch", + errRead: "read error", + errWrite: "write error", + errMisc: "misc error", + errInvalidMsgCode: "invalid message code", + errInvalidMsg: "invalid message", errP2PVersionMismatch: "P2P Version Mismatch", - errPubkeyMissing: "Public key missing", - errPubkeyInvalid: "Public key invalid", - errPubkeyForbidden: "Public key forbidden", - errProtocolBreach: "Protocol Breach", - errPingTimeout: "Ping timeout", - errInvalidNetworkId: "Invalid network id", - errInvalidProtocolVersion: "Invalid protocol version", + errPubkeyInvalid: "public key invalid", + errPubkeyForbidden: "public key forbidden", + errProtocolBreach: "protocol Breach", + errPingTimeout: "ping timeout", + errInvalidNetworkId: "invalid network id", + errInvalidProtocolVersion: "invalid protocol version", } type peerError struct { @@ -62,22 +60,22 @@ func (self *peerError) Error() string { type DiscReason byte const ( - DiscRequested DiscReason = 0x00 - DiscNetworkError = 0x01 - DiscProtocolError = 0x02 - DiscUselessPeer = 0x03 - DiscTooManyPeers = 0x04 - DiscAlreadyConnected = 0x05 - DiscIncompatibleVersion = 0x06 - DiscInvalidIdentity = 0x07 - DiscQuitting = 0x08 - DiscUnexpectedIdentity = 0x09 - DiscSelf = 0x0a - DiscReadTimeout = 0x0b - DiscSubprotocolError = 0x10 + DiscRequested DiscReason = iota + DiscNetworkError + DiscProtocolError + DiscUselessPeer + DiscTooManyPeers + DiscAlreadyConnected + DiscIncompatibleVersion + DiscInvalidIdentity + DiscQuitting + DiscUnexpectedIdentity + DiscSelf + DiscReadTimeout + DiscSubprotocolError ) -var discReasonToString = [DiscSubprotocolError + 1]string{ +var discReasonToString = [...]string{ DiscRequested: "Disconnect requested", DiscNetworkError: "Network error", DiscProtocolError: "Breach of protocol", @@ -117,7 +115,7 @@ func discReasonForError(err error) DiscReason { switch peerError.Code { case errP2PVersionMismatch: return DiscIncompatibleVersion - case errPubkeyMissing, errPubkeyInvalid: + case errPubkeyInvalid: return DiscInvalidIdentity case errPubkeyForbidden: return DiscUselessPeer diff --git a/p2p/peer_test.go b/p2p/peer_test.go index 4ee88f112b..76d856d3e0 100644 --- a/p2p/peer_test.go +++ b/p2p/peer_test.go @@ -1,15 +1,17 @@ package p2p import ( - "bufio" "bytes" - "encoding/hex" - "io" + "fmt" "io/ioutil" "net" "reflect" + "sort" "testing" "time" + + "github.com/ethereum/go-ethereum/p2p/discover" + "github.com/ethereum/go-ethereum/rlp" ) var discard = Protocol{ @@ -28,17 +30,13 @@ var discard = Protocol{ }, } -func testPeer(protos []Protocol) (net.Conn, *Peer, <-chan error) { +func testPeer(handshake bool, protos []Protocol) (*frameRW, *Peer, <-chan DiscReason) { conn1, conn2 := net.Pipe() - peer := newPeer(conn1, protos, nil) - peer.ourID = &peerId{} - peer.pubkeyHook = func(*peerAddr) error { return nil } - errc := make(chan error, 1) - go func() { - _, err := peer.loop() - errc <- err - }() - return conn2, peer, errc + peer := newPeer(conn1, protos, "name", &discover.NodeID{}, &discover.NodeID{}) + peer.protocolHandshakeEnabled = handshake + errc := make(chan DiscReason, 1) + go func() { errc <- peer.run() }() + return newFrameRW(conn2, msgWriteTimeout), peer, errc } func TestPeerProtoReadMsg(t *testing.T) { @@ -49,31 +47,28 @@ func TestPeerProtoReadMsg(t *testing.T) { Name: "a", Length: 5, Run: func(peer *Peer, rw MsgReadWriter) error { - msg, err := rw.ReadMsg() - if err != nil { - t.Errorf("read error: %v", err) + if err := expectMsg(rw, 2, []uint{1}); err != nil { + t.Error(err) } - if msg.Code != 2 { - t.Errorf("incorrect msg code %d relayed to protocol", msg.Code) - } - data, err := ioutil.ReadAll(msg.Payload) - if err != nil { - t.Errorf("payload read error: %v", err) + if err := expectMsg(rw, 3, []uint{2}); err != nil { + t.Error(err) } - expdata, _ := hex.DecodeString("0183303030") - if !bytes.Equal(expdata, data) { - t.Errorf("incorrect msg data %x", data) + if err := expectMsg(rw, 4, []uint{3}); err != nil { + t.Error(err) } close(done) return nil }, } - net, peer, errc := testPeer([]Protocol{proto}) - defer net.Close() + rw, peer, errc := testPeer(false, []Protocol{proto}) + defer rw.Close() peer.startSubprotocols([]Cap{proto.cap()}) - writeMsg(net, NewMsg(18, 1, "000")) + EncodeMsg(rw, baseProtocolLength+2, 1) + EncodeMsg(rw, baseProtocolLength+3, 2) + EncodeMsg(rw, baseProtocolLength+4, 3) + select { case <-done: case err := <-errc: @@ -105,11 +100,11 @@ func TestPeerProtoReadLargeMsg(t *testing.T) { }, } - net, peer, errc := testPeer([]Protocol{proto}) - defer net.Close() + rw, peer, errc := testPeer(false, []Protocol{proto}) + defer rw.Close() peer.startSubprotocols([]Cap{proto.cap()}) - writeMsg(net, NewMsg(18, make([]byte, msgsize))) + EncodeMsg(rw, 18, make([]byte, msgsize)) select { case <-done: case err := <-errc: @@ -135,32 +130,20 @@ func TestPeerProtoEncodeMsg(t *testing.T) { return nil }, } - net, peer, _ := testPeer([]Protocol{proto}) - defer net.Close() + rw, peer, _ := testPeer(false, []Protocol{proto}) + defer rw.Close() peer.startSubprotocols([]Cap{proto.cap()}) - bufr := bufio.NewReader(net) - msg, err := readMsg(bufr) - if err != nil { - t.Errorf("read error: %v", err) - } - if msg.Code != 17 { - t.Errorf("incorrect message code: got %d, expected %d", msg.Code, 17) - } - var data []string - if err := msg.Decode(&data); err != nil { - t.Errorf("payload decode error: %v", err) - } - if !reflect.DeepEqual(data, []string{"foo", "bar"}) { - t.Errorf("payload RLP mismatch, got %#v, want %#v", data, []string{"foo", "bar"}) + if err := expectMsg(rw, 17, []string{"foo", "bar"}); err != nil { + t.Error(err) } } -func TestPeerWrite(t *testing.T) { +func TestPeerWriteForBroadcast(t *testing.T) { defer testlog(t).detach() - net, peer, peerErr := testPeer([]Protocol{discard}) - defer net.Close() + rw, peer, peerErr := testPeer(false, []Protocol{discard}) + defer rw.Close() peer.startSubprotocols([]Cap{discard.cap()}) // test write errors @@ -176,18 +159,13 @@ func TestPeerWrite(t *testing.T) { // setup for reading the message on the other end read := make(chan struct{}) go func() { - bufr := bufio.NewReader(net) - msg, err := readMsg(bufr) - if err != nil { - t.Errorf("read error: %v", err) - } else if msg.Code != 16 { - t.Errorf("wrong code, got %d, expected %d", msg.Code, 16) + if err := expectMsg(rw, 16, nil); err != nil { + t.Error() } - msg.Discard() close(read) }() - // test succcessful write + // test successful write if err := peer.writeProtoMsg("discard", NewMsg(0)); err != nil { t.Errorf("expect no error for known protocol: %v", err) } @@ -198,104 +176,152 @@ func TestPeerWrite(t *testing.T) { } } -func TestPeerActivity(t *testing.T) { - // shorten inactivityTimeout while this test is running - oldT := inactivityTimeout - defer func() { inactivityTimeout = oldT }() - inactivityTimeout = 20 * time.Millisecond +func TestPeerPing(t *testing.T) { + defer testlog(t).detach() - net, peer, peerErr := testPeer([]Protocol{discard}) - defer net.Close() - peer.startSubprotocols([]Cap{discard.cap()}) + rw, _, _ := testPeer(false, nil) + defer rw.Close() + if err := EncodeMsg(rw, pingMsg); err != nil { + t.Fatal(err) + } + if err := expectMsg(rw, pongMsg, nil); err != nil { + t.Error(err) + } +} - sub := peer.activity.Subscribe(time.Time{}) - defer sub.Unsubscribe() +func TestPeerDisconnect(t *testing.T) { + defer testlog(t).detach() - for i := 0; i < 6; i++ { - writeMsg(net, NewMsg(16)) - select { - case <-sub.Chan(): - case <-time.After(inactivityTimeout / 2): - t.Fatal("no event within ", inactivityTimeout/2) - case err := <-peerErr: - t.Fatal("peer error", err) - } + rw, _, disc := testPeer(false, nil) + defer rw.Close() + if err := EncodeMsg(rw, discMsg, DiscQuitting); err != nil { + t.Fatal(err) } - - select { - case <-time.After(inactivityTimeout * 2): - case <-sub.Chan(): - t.Fatal("got activity event while connection was inactive") - case err := <-peerErr: - t.Fatal("peer error", err) + if err := expectMsg(rw, discMsg, []interface{}{DiscRequested}); err != nil { + t.Error(err) + } + rw.Close() // make test end faster + if reason := <-disc; reason != DiscRequested { + t.Errorf("run returned wrong reason: got %v, want %v", reason, DiscRequested) } } -func TestNewPeer(t *testing.T) { - caps := []Cap{{"foo", 2}, {"bar", 3}} - id := &peerId{} - p := NewPeer(id, caps) - if !reflect.DeepEqual(p.Caps(), caps) { - t.Errorf("Caps mismatch: got %v, expected %v", p.Caps(), caps) +func TestPeerHandshake(t *testing.T) { + defer testlog(t).detach() + + // remote has two matching protocols: a and c + remote := NewPeer(randomID(), "", []Cap{{"a", 1}, {"b", 999}, {"c", 3}}) + remoteID := randomID() + remote.ourID = &remoteID + remote.ourName = "remote peer" + + start := make(chan string) + stop := make(chan struct{}) + run := func(p *Peer, rw MsgReadWriter) error { + name := rw.(*proto).name + if name != "a" && name != "c" { + t.Errorf("protocol %q should not be started", name) + } else { + start <- name + } + <-stop + return nil } - if p.Identity() != id { - t.Errorf("Identity mismatch: got %v, expected %v", p.Identity(), id) + protocols := []Protocol{ + {Name: "a", Version: 1, Length: 1, Run: run}, + {Name: "b", Version: 2, Length: 1, Run: run}, + {Name: "c", Version: 3, Length: 1, Run: run}, + {Name: "d", Version: 4, Length: 1, Run: run}, } - // Should not hang. - p.Disconnect(DiscAlreadyConnected) -} + rw, p, disc := testPeer(true, protocols) + p.remoteID = remote.ourID + defer rw.Close() -func TestEOFSignal(t *testing.T) { - rb := make([]byte, 10) + // run the handshake + remoteProtocols := []Protocol{protocols[0], protocols[2]} + if err := writeProtocolHandshake(rw, "remote peer", remoteID, remoteProtocols); err != nil { + t.Fatalf("handshake write error: %v", err) + } + if err := readProtocolHandshake(remote, rw); err != nil { + t.Fatalf("handshake read error: %v", err) + } - // empty reader - eof := make(chan struct{}, 1) - sig := &eofSignal{new(bytes.Buffer), 0, eof} - if n, err := sig.Read(rb); n != 0 || err != io.EOF { - t.Errorf("Read returned unexpected values: (%v, %v)", n, err) + // check that all protocols have been started + var started []string + for i := 0; i < 2; i++ { + select { + case name := <-start: + started = append(started, name) + case <-time.After(100 * time.Millisecond): + } } - select { - case <-eof: - default: - t.Error("EOF chan not signaled") + sort.Strings(started) + if !reflect.DeepEqual(started, []string{"a", "c"}) { + t.Errorf("wrong protocols started: %v", started) } - // count before error - eof = make(chan struct{}, 1) - sig = &eofSignal{bytes.NewBufferString("aaaaaaaa"), 4, eof} - if n, err := sig.Read(rb); n != 8 || err != nil { - t.Errorf("Read returned unexpected values: (%v, %v)", n, err) + // check that metadata has been set + if p.ID() != remoteID { + t.Errorf("peer has wrong node ID: got %v, want %v", p.ID(), remoteID) } - select { - case <-eof: - default: - t.Error("EOF chan not signaled") + if p.Name() != remote.ourName { + t.Errorf("peer has wrong node name: got %q, want %q", p.Name(), remote.ourName) } - // error before count - eof = make(chan struct{}, 1) - sig = &eofSignal{bytes.NewBufferString("aaaa"), 999, eof} - if n, err := sig.Read(rb); n != 4 || err != nil { - t.Errorf("Read returned unexpected values: (%v, %v)", n, err) + close(stop) + t.Logf("disc reason: %v", <-disc) +} + +func TestNewPeer(t *testing.T) { + name := "nodename" + caps := []Cap{{"foo", 2}, {"bar", 3}} + id := randomID() + p := NewPeer(id, name, caps) + if p.ID() != id { + t.Errorf("ID mismatch: got %v, expected %v", p.ID(), id) } - if n, err := sig.Read(rb); n != 0 || err != io.EOF { - t.Errorf("Read returned unexpected values: (%v, %v)", n, err) + if p.Name() != name { + t.Errorf("Name mismatch: got %v, expected %v", p.Name(), name) } - select { - case <-eof: - default: - t.Error("EOF chan not signaled") + if !reflect.DeepEqual(p.Caps(), caps) { + t.Errorf("Caps mismatch: got %v, expected %v", p.Caps(), caps) } - // no signal if neither occurs - eof = make(chan struct{}, 1) - sig = &eofSignal{bytes.NewBufferString("aaaaaaaaaaaaaaaaaaaaa"), 999, eof} - if n, err := sig.Read(rb); n != 10 || err != nil { - t.Errorf("Read returned unexpected values: (%v, %v)", n, err) + p.Disconnect(DiscAlreadyConnected) // Should not hang +} + +// expectMsg reads a message from r and verifies that its +// code and encoded RLP content match the provided values. +// If content is nil, the payload is discarded and not verified. +func expectMsg(r MsgReader, code uint64, content interface{}) error { + msg, err := r.ReadMsg() + if err != nil { + return err } - select { - case <-eof: - t.Error("unexpected EOF signal") - default: + if msg.Code != code { + return fmt.Errorf("message code mismatch: got %d, expected %d", msg.Code, code) + } + if content == nil { + return msg.Discard() + } else { + contentEnc, err := rlp.EncodeToBytes(content) + if err != nil { + panic("content encode error: " + err.Error()) + } + // skip over list header in encoded value. this is temporary. + contentEncR := bytes.NewReader(contentEnc) + if k, _, err := rlp.NewStream(contentEncR).Kind(); k != rlp.List || err != nil { + panic("content must encode as RLP list") + } + contentEnc = contentEnc[len(contentEnc)-contentEncR.Len():] + + actualContent, err := ioutil.ReadAll(msg.Payload) + if err != nil { + return err + } + if !bytes.Equal(actualContent, contentEnc) { + return fmt.Errorf("message payload mismatch:\ngot: %x\nwant: %x", actualContent, contentEnc) + } } + return nil } diff --git a/p2p/protocol.go b/p2p/protocol.go index 62ada929d7..fe359fc549 100644 --- a/p2p/protocol.go +++ b/p2p/protocol.go @@ -1,10 +1,5 @@ package p2p -import ( - "bytes" - "time" -) - // Protocol represents a P2P subprotocol implementation. type Protocol struct { // Name should contain the official protocol name, @@ -32,42 +27,6 @@ func (p Protocol) cap() Cap { return Cap{p.Name, p.Version} } -const ( - baseProtocolVersion = 2 - baseProtocolLength = uint64(16) - baseProtocolMaxMsgSize = 10 * 1024 * 1024 -) - -const ( - // devp2p message codes - handshakeMsg = 0x00 - discMsg = 0x01 - pingMsg = 0x02 - pongMsg = 0x03 - getPeersMsg = 0x04 - peersMsg = 0x05 -) - -// handshake is the structure of a handshake list. -type handshake struct { - Version uint64 - ID string - Caps []Cap - ListenPort uint64 - NodeID []byte -} - -func (h *handshake) String() string { - return h.ID -} -func (h *handshake) Pubkey() []byte { - return h.NodeID -} - -func (h *handshake) PrivKey() []byte { - return nil -} - // Cap is the structure of a peer capability. type Cap struct { Name string @@ -83,210 +42,3 @@ type capsByName []Cap func (cs capsByName) Len() int { return len(cs) } func (cs capsByName) Less(i, j int) bool { return cs[i].Name < cs[j].Name } func (cs capsByName) Swap(i, j int) { cs[i], cs[j] = cs[j], cs[i] } - -type baseProtocol struct { - rw MsgReadWriter - peer *Peer -} - -func runBaseProtocol(peer *Peer, rw MsgReadWriter) error { - bp := &baseProtocol{rw, peer} - errc := make(chan error, 1) - go func() { errc <- rw.WriteMsg(bp.handshakeMsg()) }() - if err := bp.readHandshake(); err != nil { - return err - } - // handle write error - if err := <-errc; err != nil { - return err - } - // run main loop - go func() { - for { - if err := bp.handle(rw); err != nil { - errc <- err - break - } - } - }() - return bp.loop(errc) -} - -var pingTimeout = 2 * time.Second - -func (bp *baseProtocol) loop(quit <-chan error) error { - ping := time.NewTimer(pingTimeout) - activity := bp.peer.activity.Subscribe(time.Time{}) - lastActive := time.Time{} - defer ping.Stop() - defer activity.Unsubscribe() - - getPeersTick := time.NewTicker(10 * time.Second) - defer getPeersTick.Stop() - err := EncodeMsg(bp.rw, getPeersMsg) - - for err == nil { - select { - case err = <-quit: - return err - case <-getPeersTick.C: - err = EncodeMsg(bp.rw, getPeersMsg) - case event := <-activity.Chan(): - ping.Reset(pingTimeout) - lastActive = event.(time.Time) - case t := <-ping.C: - if lastActive.Add(pingTimeout * 2).Before(t) { - err = newPeerError(errPingTimeout, "") - } else if lastActive.Add(pingTimeout).Before(t) { - err = EncodeMsg(bp.rw, pingMsg) - } - } - } - return err -} - -func (bp *baseProtocol) handle(rw MsgReadWriter) error { - msg, err := rw.ReadMsg() - if err != nil { - return err - } - if msg.Size > baseProtocolMaxMsgSize { - return newPeerError(errMisc, "message too big") - } - // make sure that the payload has been fully consumed - defer msg.Discard() - - switch msg.Code { - case handshakeMsg: - return newPeerError(errProtocolBreach, "extra handshake received") - - case discMsg: - var reason [1]DiscReason - if err := msg.Decode(&reason); err != nil { - return err - } - return discRequestedError(reason[0]) - - case pingMsg: - return EncodeMsg(bp.rw, pongMsg) - - case pongMsg: - - case getPeersMsg: - peers := bp.peerList() - // this is dangerous. the spec says that we should _delay_ - // sending the response if no new information is available. - // this means that would need to send a response later when - // new peers become available. - // - // TODO: add event mechanism to notify baseProtocol for new peers - if len(peers) > 0 { - return EncodeMsg(bp.rw, peersMsg, peers...) - } - - case peersMsg: - var peers []*peerAddr - if err := msg.Decode(&peers); err != nil { - return err - } - for _, addr := range peers { - bp.peer.Debugf("received peer suggestion: %v", addr) - bp.peer.newPeerAddr <- addr - } - - default: - return newPeerError(errInvalidMsgCode, "unknown message code %v", msg.Code) - } - return nil -} - -func (bp *baseProtocol) readHandshake() error { - // read and handle remote handshake - msg, err := bp.rw.ReadMsg() - if err != nil { - return err - } - if msg.Code != handshakeMsg { - return newPeerError(errProtocolBreach, "first message must be handshake, got %x", msg.Code) - } - if msg.Size > baseProtocolMaxMsgSize { - return newPeerError(errMisc, "message too big") - } - var hs handshake - if err := msg.Decode(&hs); err != nil { - return err - } - // validate handshake info - if hs.Version != baseProtocolVersion { - return newPeerError(errP2PVersionMismatch, "Require protocol %d, received %d\n", - baseProtocolVersion, hs.Version) - } - if len(hs.NodeID) == 0 { - return newPeerError(errPubkeyMissing, "") - } - if len(hs.NodeID) != 64 { - return newPeerError(errPubkeyInvalid, "require 512 bit, got %v", len(hs.NodeID)*8) - } - if da := bp.peer.dialAddr; da != nil { - // verify that the peer we wanted to connect to - // actually holds the target public key. - if da.Pubkey != nil && !bytes.Equal(da.Pubkey, hs.NodeID) { - return newPeerError(errPubkeyForbidden, "dial address pubkey mismatch") - } - } - pa := newPeerAddr(bp.peer.conn.RemoteAddr(), hs.NodeID) - if err := bp.peer.pubkeyHook(pa); err != nil { - return newPeerError(errPubkeyForbidden, "%v", err) - } - // TODO: remove Caps with empty name - var addr *peerAddr - if hs.ListenPort != 0 { - addr = newPeerAddr(bp.peer.conn.RemoteAddr(), hs.NodeID) - addr.Port = hs.ListenPort - } - bp.peer.setHandshakeInfo(&hs, addr, hs.Caps) - bp.peer.startSubprotocols(hs.Caps) - return nil -} - -func (bp *baseProtocol) handshakeMsg() Msg { - var ( - port uint64 - caps []interface{} - ) - if bp.peer.ourListenAddr != nil { - port = bp.peer.ourListenAddr.Port - } - for _, proto := range bp.peer.protocols { - caps = append(caps, proto.cap()) - } - return NewMsg(handshakeMsg, - baseProtocolVersion, - bp.peer.ourID.String(), - caps, - port, - bp.peer.ourID.Pubkey()[1:], - ) -} - -func (bp *baseProtocol) peerList() []interface{} { - peers := bp.peer.otherPeers() - ds := make([]interface{}, 0, len(peers)) - for _, p := range peers { - p.infolock.Lock() - addr := p.listenAddr - p.infolock.Unlock() - // filter out this peer and peers that are not listening or - // have not completed the handshake. - // TODO: track previously sent peers and exclude them as well. - if p == bp.peer || addr == nil { - continue - } - ds = append(ds, addr) - } - ourAddr := bp.peer.ourListenAddr - if ourAddr != nil && !ourAddr.IP.IsLoopback() && !ourAddr.IP.IsUnspecified() { - ds = append(ds, ourAddr) - } - return ds -} diff --git a/p2p/protocol_test.go b/p2p/protocol_test.go deleted file mode 100644 index 6804a9d40b..0000000000 --- a/p2p/protocol_test.go +++ /dev/null @@ -1,167 +0,0 @@ -package p2p - -import ( - "fmt" - "net" - "reflect" - "sync" - "testing" - - "github.com/ethereum/go-ethereum/crypto" -) - -type peerId struct { - privKey, pubkey []byte -} - -func (self *peerId) String() string { - return fmt.Sprintf("test peer %x", self.Pubkey()[:4]) -} - -func (self *peerId) Pubkey() (pubkey []byte) { - pubkey = self.pubkey - if len(pubkey) == 0 { - pubkey = crypto.GenerateNewKeyPair().PublicKey - self.pubkey = pubkey - } - return -} - -func (self *peerId) PrivKey() (privKey []byte) { - privKey = self.privKey - if len(privKey) == 0 { - privKey = crypto.GenerateNewKeyPair().PublicKey - self.privKey = privKey - } - return -} - -func newTestPeer() (peer *Peer) { - peer = NewPeer(&peerId{}, []Cap{}) - peer.pubkeyHook = func(*peerAddr) error { return nil } - peer.ourID = &peerId{} - peer.listenAddr = &peerAddr{} - peer.otherPeers = func() []*Peer { return nil } - return -} - -func TestBaseProtocolPeers(t *testing.T) { - peerList := []*peerAddr{ - {IP: net.ParseIP("1.2.3.4"), Port: 2222, Pubkey: []byte{}}, - {IP: net.ParseIP("5.6.7.8"), Port: 3333, Pubkey: []byte{}}, - } - listenAddr := &peerAddr{IP: net.ParseIP("1.3.5.7"), Port: 1111, Pubkey: []byte{}} - rw1, rw2 := MsgPipe() - defer rw1.Close() - wg := new(sync.WaitGroup) - - // run matcher, close pipe when addresses have arrived - numPeers := len(peerList) + 1 - addrChan := make(chan *peerAddr) - wg.Add(1) - go func() { - i := 0 - for got := range addrChan { - var want *peerAddr - switch { - case i < len(peerList): - want = peerList[i] - case i == len(peerList): - want = listenAddr // listenAddr should be the last thing sent - } - t.Logf("got peer %d/%d: %v", i+1, numPeers, got) - if !reflect.DeepEqual(want, got) { - t.Errorf("mismatch: got %+v, want %+v", got, want) - } - i++ - if i == numPeers { - break - } - } - if i != numPeers { - t.Errorf("wrong number of peers received: got %d, want %d", i, numPeers) - } - rw1.Close() - wg.Done() - }() - - // run first peer (in background) - peer1 := newTestPeer() - peer1.ourListenAddr = listenAddr - peer1.otherPeers = func() []*Peer { - pl := make([]*Peer, len(peerList)) - for i, addr := range peerList { - pl[i] = &Peer{listenAddr: addr} - } - return pl - } - wg.Add(1) - go func() { - runBaseProtocol(peer1, rw1) - wg.Done() - }() - - // run second peer - peer2 := newTestPeer() - peer2.newPeerAddr = addrChan // feed peer suggestions into matcher - if err := runBaseProtocol(peer2, rw2); err != ErrPipeClosed { - t.Errorf("peer2 terminated with unexpected error: %v", err) - } - - // terminate matcher - close(addrChan) - wg.Wait() -} - -func TestBaseProtocolDisconnect(t *testing.T) { - peer := NewPeer(&peerId{}, nil) - peer.ourID = &peerId{} - peer.pubkeyHook = func(*peerAddr) error { return nil } - - rw1, rw2 := MsgPipe() - done := make(chan struct{}) - go func() { - if err := expectMsg(rw2, handshakeMsg); err != nil { - t.Error(err) - } - err := EncodeMsg(rw2, handshakeMsg, - baseProtocolVersion, - "", - []interface{}{}, - 0, - make([]byte, 64), - ) - if err != nil { - t.Error(err) - } - if err := expectMsg(rw2, getPeersMsg); err != nil { - t.Error(err) - } - if err := EncodeMsg(rw2, discMsg, DiscQuitting); err != nil { - t.Error(err) - } - - close(done) - }() - - if err := runBaseProtocol(peer, rw1); err == nil { - t.Errorf("base protocol returned without error") - } else if reason, ok := err.(discRequestedError); !ok || reason != DiscQuitting { - t.Errorf("base protocol returned wrong error: %v", err) - } - <-done -} - -func expectMsg(r MsgReader, code uint64) error { - msg, err := r.ReadMsg() - if err != nil { - return err - } - if err := msg.Discard(); err != nil { - return err - } - if msg.Code != code { - return fmt.Errorf("wrong message code: got %d, expected %d", msg.Code, code) - } - return nil -} diff --git a/p2p/server.go b/p2p/server.go index 4fd1f7d034..9b80305414 100644 --- a/p2p/server.go +++ b/p2p/server.go @@ -2,37 +2,56 @@ package p2p import ( "bytes" + "crypto/ecdsa" "errors" "fmt" + "io" "net" + "runtime" "sync" "time" "github.com/ethereum/go-ethereum/logger" + "github.com/ethereum/go-ethereum/p2p/discover" ) const ( - outboundAddressPoolSize = 500 defaultDialTimeout = 10 * time.Second + refreshPeersInterval = 30 * time.Second portMappingUpdateInterval = 15 * time.Minute portMappingTimeout = 20 * time.Minute ) var srvlog = logger.NewLogger("P2P Server") +// MakeName creates a node name that follows the ethereum convention +// for such names. It adds the operation system name and Go runtime version +// the name. +func MakeName(name, version string) string { + return fmt.Sprintf("%s/v%s/%s/%s", name, version, runtime.GOOS, runtime.Version()) +} + // Server manages all peer connections. // // The fields of Server are used as configuration parameters. // You should set them before starting the Server. Fields may not be // modified while the server is running. type Server struct { - // This field must be set to a valid client identity. - Identity ClientIdentity + // This field must be set to a valid secp256k1 private key. + PrivateKey *ecdsa.PrivateKey // MaxPeers is the maximum number of peers that can be // connected. It must be greater than zero. MaxPeers int + // Name sets the node name of this server. + // Use MakeName to create a name that follows existing conventions. + Name string + + // Bootstrap nodes are used to establish connectivity + // with the rest of the network. + BootstrapNodes []discover.Node + // Protocols should contain the protocols supported // by the server. Matching protocols are launched for // each peer. @@ -62,22 +81,23 @@ type Server struct { // If NoDial is true, the server will not dial any peers. NoDial bool - // Hook for testing. This is useful because we can inhibit + // Hooks for testing. These are useful because we can inhibit // the whole protocol stack. - newPeerFunc peerFunc + handshakeFunc + newPeerHook - lock sync.RWMutex - running bool - listener net.Listener - laddr *net.TCPAddr // real listen addr - peers []*Peer - peerSlots chan int - peerCount int - - quit chan struct{} - wg sync.WaitGroup - peerConnect chan *peerAddr - peerDisconnect chan *Peer + lock sync.RWMutex + running bool + listener net.Listener + laddr *net.TCPAddr // real listen addr + peers map[discover.NodeID]*Peer + + ntab *discover.Table + + quit chan struct{} + loopWG sync.WaitGroup // {dial,listen,nat}Loop + peerWG sync.WaitGroup // active peer goroutines + peerConnect chan *discover.Node } // NAT is implemented by NAT traversal methods. @@ -90,7 +110,8 @@ type NAT interface { String() string } -type peerFunc func(srv *Server, c net.Conn, dialAddr *peerAddr) *Peer +type handshakeFunc func(io.ReadWriter, *ecdsa.PrivateKey, *discover.Node) (discover.NodeID, []byte, error) +type newPeerHook func(*Peer) // Peers returns all connected peers. func (srv *Server) Peers() (peers []*Peer) { @@ -107,18 +128,15 @@ func (srv *Server) Peers() (peers []*Peer) { // PeerCount returns the number of connected peers. func (srv *Server) PeerCount() int { srv.lock.RLock() - defer srv.lock.RUnlock() - return srv.peerCount + n := len(srv.peers) + srv.lock.RUnlock() + return n } -// SuggestPeer injects an address into the outbound address pool. -func (srv *Server) SuggestPeer(ip net.IP, port int, nodeID []byte) { - addr := &peerAddr{ip, uint64(port), nodeID} - select { - case srv.peerConnect <- addr: - default: // don't block - srvlog.Warnf("peer suggestion %v ignored", addr) - } +// SuggestPeer creates a connection to the given Node if it +// is not already connected. +func (srv *Server) SuggestPeer(ip net.IP, port int, id discover.NodeID) { + srv.peerConnect <- &discover.Node{ID: id, Addr: &net.UDPAddr{IP: ip, Port: port}} } // Broadcast sends an RLP-encoded message to all connected peers. @@ -152,47 +170,47 @@ func (srv *Server) Start() (err error) { } srvlog.Infoln("Starting Server") - // initialize fields - if srv.Identity == nil { - return fmt.Errorf("Server.Identity must be set to a non-nil identity") + // initialize all the fields + if srv.PrivateKey == nil { + return fmt.Errorf("Server.PrivateKey must be set to a non-nil key") } if srv.MaxPeers <= 0 { return fmt.Errorf("Server.MaxPeers must be > 0") } srv.quit = make(chan struct{}) - srv.peers = make([]*Peer, srv.MaxPeers) - srv.peerSlots = make(chan int, srv.MaxPeers) - srv.peerConnect = make(chan *peerAddr, outboundAddressPoolSize) - srv.peerDisconnect = make(chan *Peer) - if srv.newPeerFunc == nil { - srv.newPeerFunc = newServerPeer + srv.peers = make(map[discover.NodeID]*Peer) + srv.peerConnect = make(chan *discover.Node) + + if srv.handshakeFunc == nil { + srv.handshakeFunc = encHandshake } if srv.Blacklist == nil { srv.Blacklist = NewBlacklist() } - if srv.Dialer == nil { - srv.Dialer = &net.Dialer{Timeout: defaultDialTimeout} - } - if srv.ListenAddr != "" { if err := srv.startListening(); err != nil { return err } } + + // dial stuff + dt, err := discover.ListenUDP(srv.PrivateKey, srv.ListenAddr) + if err != nil { + return err + } + srv.ntab = dt + if srv.Dialer == nil { + srv.Dialer = &net.Dialer{Timeout: defaultDialTimeout} + } if !srv.NoDial { - srv.wg.Add(1) + srv.loopWG.Add(1) go srv.dialLoop() } + if srv.NoDial && srv.ListenAddr == "" { srvlog.Warnln("I will be kind-of useless, neither dialing nor listening.") } - // make all slots available - for i := range srv.peers { - srv.peerSlots <- i - } - // note: discLoop is not part of WaitGroup - go srv.discLoop() srv.running = true return nil } @@ -205,10 +223,10 @@ func (srv *Server) startListening() error { srv.ListenAddr = listener.Addr().String() srv.laddr = listener.Addr().(*net.TCPAddr) srv.listener = listener - srv.wg.Add(1) + srv.loopWG.Add(1) go srv.listenLoop() if !srv.laddr.IP.IsLoopback() && srv.NAT != nil { - srv.wg.Add(1) + srv.loopWG.Add(1) go srv.natLoop(srv.laddr.Port) } return nil @@ -225,57 +243,41 @@ func (srv *Server) Stop() { srv.running = false srv.lock.Unlock() - srvlog.Infoln("Stopping server") + srvlog.Infoln("Stopping Server") + srv.ntab.Close() if srv.listener != nil { // this unblocks listener Accept srv.listener.Close() } close(srv.quit) - for _, peer := range srv.Peers() { - peer.Disconnect(DiscQuitting) - } - srv.wg.Wait() + srv.loopWG.Wait() - // wait till they actually disconnect - // this is checked by claiming all peerSlots. - // slots become available as the peers disconnect. - for i := 0; i < cap(srv.peerSlots); i++ { - <-srv.peerSlots - } - // terminate discLoop - close(srv.peerDisconnect) -} - -func (srv *Server) discLoop() { - for peer := range srv.peerDisconnect { - srv.removePeer(peer) + // No new peers can be added at this point because dialLoop and + // listenLoop are down. It is safe to call peerWG.Wait because + // peerWG.Add is not called outside of those loops. + for _, peer := range srv.peers { + peer.Disconnect(DiscQuitting) } + srv.peerWG.Wait() } // main loop for adding connections via listening func (srv *Server) listenLoop() { - defer srv.wg.Done() - + defer srv.loopWG.Done() srvlog.Infoln("Listening on", srv.listener.Addr()) for { - select { - case slot := <-srv.peerSlots: - srvlog.Debugf("grabbed slot %v for listening", slot) - conn, err := srv.listener.Accept() - if err != nil { - srv.peerSlots <- slot - return - } - srvlog.Debugf("Accepted conn %v (slot %d)\n", conn.RemoteAddr(), slot) - srv.addPeer(conn, nil, slot) - case <-srv.quit: + conn, err := srv.listener.Accept() + if err != nil { return } + srvlog.Debugf("Accepted conn %v\n", conn.RemoteAddr()) + srv.peerWG.Add(1) + go srv.startPeer(conn, nil) } } func (srv *Server) natLoop(port int) { - defer srv.wg.Done() + defer srv.loopWG.Done() for { srv.updatePortMapping(port) select { @@ -314,108 +316,131 @@ func (srv *Server) removePortMapping(port int) { } func (srv *Server) dialLoop() { - defer srv.wg.Done() - var ( - suggest chan *peerAddr - slot *int - slots = srv.peerSlots - ) + defer srv.loopWG.Done() + refresh := time.NewTicker(refreshPeersInterval) + defer refresh.Stop() + + srv.ntab.Bootstrap(srv.BootstrapNodes) + go srv.findPeers() + + dialed := make(chan *discover.Node) + dialing := make(map[discover.NodeID]bool) + + // TODO: limit number of active dials + // TODO: ensure only one findPeers goroutine is running + // TODO: pause findPeers when we're at capacity + for { select { - case i := <-slots: - // we need a peer in slot i, slot reserved - slot = &i - // now we can watch for candidate peers in the next loop - suggest = srv.peerConnect - // do not consume more until candidate peer is found - slots = nil - - case desc := <-suggest: - // candidate peer found, will dial out asyncronously - // if connection fails slot will be released - srvlog.DebugDetailf("dial %v (%v)", desc, *slot) - go srv.dialPeer(desc, *slot) - // we can watch if more peers needed in the next loop - slots = srv.peerSlots - // until then we dont care about candidate peers - suggest = nil + case <-refresh.C: - case <-srv.quit: - // give back the currently reserved slot - if slot != nil { - srv.peerSlots <- *slot + go srv.findPeers() + + case dest := <-srv.peerConnect: + srv.lock.Lock() + _, isconnected := srv.peers[dest.ID] + srv.lock.Unlock() + if isconnected || dialing[dest.ID] { + continue } + + dialing[dest.ID] = true + srv.peerWG.Add(1) + go func() { + srv.dialNode(dest) + // at this point, the peer has been added + // or discarded. either way, we're not dialing it anymore. + dialed <- dest + }() + + case dest := <-dialed: + delete(dialing, dest.ID) + + case <-srv.quit: + // TODO: maybe wait for active dials return } } } -// connect to peer via dial out -func (srv *Server) dialPeer(desc *peerAddr, slot int) { - srvlog.Debugf("Dialing %v (slot %d)\n", desc, slot) - conn, err := srv.Dialer.Dial(desc.Network(), desc.String()) +func (srv *Server) dialNode(dest *discover.Node) { + srvlog.Debugf("Dialing %v\n", dest.Addr) + conn, err := srv.Dialer.Dial("tcp", dest.Addr.String()) if err != nil { srvlog.DebugDetailf("dial error: %v", err) - srv.peerSlots <- slot return } - go srv.addPeer(conn, desc, slot) + srv.startPeer(conn, dest) } -// creates the new peer object and inserts it into its slot -func (srv *Server) addPeer(conn net.Conn, desc *peerAddr, slot int) *Peer { - srv.lock.Lock() - defer srv.lock.Unlock() - if !srv.running { +func (srv *Server) findPeers() { + far := srv.ntab.Self() + for i := range far { + far[i] = ^far[i] + } + closeToSelf := srv.ntab.Lookup(srv.ntab.Self()) + farFromSelf := srv.ntab.Lookup(far) + + for i := 0; i < len(closeToSelf) || i < len(farFromSelf); i++ { + if i < len(closeToSelf) { + srv.peerConnect <- closeToSelf[i] + } + if i < len(farFromSelf) { + srv.peerConnect <- farFromSelf[i] + } + } +} + +func (srv *Server) startPeer(conn net.Conn, dest *discover.Node) { + // TODO: I/O timeout, handle/store session token + remoteID, _, err := srv.handshakeFunc(conn, srv.PrivateKey, dest) + if err != nil { conn.Close() - srv.peerSlots <- slot // release slot - return nil + srvlog.Debugf("Encryption Handshake with %v failed: %v", conn.RemoteAddr(), err) + return + } + + ourID := srv.ntab.Self() + p := newPeer(conn, srv.Protocols, srv.Name, &ourID, &remoteID) + if ok, reason := srv.addPeer(remoteID, p); !ok { + p.Disconnect(reason) + return } - peer := srv.newPeerFunc(srv, conn, desc) - peer.slot = slot - srv.peers[slot] = peer - srv.peerCount++ - go func() { peer.loop(); srv.peerDisconnect <- peer }() - return peer + + srv.newPeerHook(p) + p.run() + srv.removePeer(p) } -// removes peer: sending disconnect msg, stop peer, remove rom list/table, release slot -func (srv *Server) removePeer(peer *Peer) { +func (srv *Server) addPeer(id discover.NodeID, p *Peer) (bool, DiscReason) { srv.lock.Lock() defer srv.lock.Unlock() - srvlog.Debugf("Removing %v (slot %v)\n", peer, peer.slot) - if srv.peers[peer.slot] != peer { - srvlog.Warnln("Invalid peer to remove:", peer) - return - } - // remove from list and index - srv.peerCount-- - srv.peers[peer.slot] = nil - // release slot to signal need for a new peer, last! - srv.peerSlots <- peer.slot + switch { + case !srv.running: + return false, DiscQuitting + case len(srv.peers) >= srv.MaxPeers: + return false, DiscTooManyPeers + case srv.peers[id] != nil: + return false, DiscAlreadyConnected + case srv.Blacklist.Exists(id[:]): + return false, DiscUselessPeer + case id == srv.ntab.Self(): + return false, DiscSelf + } + srvlog.Debugf("Adding %v\n", p) + srv.peers[id] = p + return true, 0 } -func (srv *Server) verifyPeer(addr *peerAddr) error { - if srv.Blacklist.Exists(addr.Pubkey) { - return errors.New("blacklisted") - } - if bytes.Equal(srv.Identity.Pubkey()[1:], addr.Pubkey) { - return newPeerError(errPubkeyForbidden, "not allowed to connect to srv") - } - srv.lock.RLock() - defer srv.lock.RUnlock() - for _, peer := range srv.peers { - if peer != nil { - id := peer.Identity() - if id != nil && bytes.Equal(id.Pubkey(), addr.Pubkey) { - return errors.New("already connected") - } - } - } - return nil +// removes peer: sending disconnect msg, stop peer, remove rom list/table, release slot +func (srv *Server) removePeer(p *Peer) { + srvlog.Debugf("Removing %v\n", p) + srv.lock.Lock() + delete(srv.peers, *p.remoteID) + srv.lock.Unlock() + srv.peerWG.Done() } -// TODO replace with "Set" type Blacklist interface { Get([]byte) (bool, error) Put([]byte) error diff --git a/p2p/server_test.go b/p2p/server_test.go index ceb89e3f7f..a05e01014f 100644 --- a/p2p/server_test.go +++ b/p2p/server_test.go @@ -2,19 +2,28 @@ package p2p import ( "bytes" + "crypto/ecdsa" "io" + "math/rand" "net" "sync" "testing" "time" + + "github.com/ethereum/go-ethereum/crypto" + "github.com/ethereum/go-ethereum/p2p/discover" ) -func startTestServer(t *testing.T, pf peerFunc) *Server { +func startTestServer(t *testing.T, pf newPeerHook) *Server { server := &Server{ - Identity: &peerId{}, + Name: "test", MaxPeers: 10, ListenAddr: "127.0.0.1:0", - newPeerFunc: pf, + PrivateKey: newkey(), + newPeerHook: pf, + handshakeFunc: func(io.ReadWriter, *ecdsa.PrivateKey, *discover.Node) (id discover.NodeID, st []byte, err error) { + return randomID(), nil, err + }, } if err := server.Start(); err != nil { t.Fatalf("Could not start server: %v", err) @@ -27,16 +36,11 @@ func TestServerListen(t *testing.T) { // start the test server connected := make(chan *Peer) - srv := startTestServer(t, func(srv *Server, conn net.Conn, dialAddr *peerAddr) *Peer { - if conn == nil { + srv := startTestServer(t, func(p *Peer) { + if p == nil { t.Error("peer func called with nil conn") } - if dialAddr != nil { - t.Error("peer func called with non-nil dialAddr") - } - peer := newPeer(conn, nil, dialAddr) - connected <- peer - return peer + connected <- p }) defer close(connected) defer srv.Stop() @@ -50,9 +54,9 @@ func TestServerListen(t *testing.T) { select { case peer := <-connected: - if peer.conn.LocalAddr().String() != conn.RemoteAddr().String() { + if peer.LocalAddr().String() != conn.RemoteAddr().String() { t.Errorf("peer started with wrong conn: got %v, want %v", - peer.conn.LocalAddr(), conn.RemoteAddr()) + peer.LocalAddr(), conn.RemoteAddr()) } case <-time.After(1 * time.Second): t.Error("server did not accept within one second") @@ -62,7 +66,7 @@ func TestServerListen(t *testing.T) { func TestServerDial(t *testing.T) { defer testlog(t).detach() - // run a fake TCP server to handle the connection. + // run a one-shot TCP server to handle the connection. listener, err := net.Listen("tcp", "127.0.0.1:0") if err != nil { t.Fatalf("could not setup listener: %v") @@ -72,41 +76,33 @@ func TestServerDial(t *testing.T) { go func() { conn, err := listener.Accept() if err != nil { - t.Error("acccept error:", err) + t.Error("accept error:", err) + return } conn.Close() accepted <- conn }() - // start the test server + // start the server connected := make(chan *Peer) - srv := startTestServer(t, func(srv *Server, conn net.Conn, dialAddr *peerAddr) *Peer { - if conn == nil { - t.Error("peer func called with nil conn") - } - peer := newPeer(conn, nil, dialAddr) - connected <- peer - return peer - }) + srv := startTestServer(t, func(p *Peer) { connected <- p }) defer close(connected) defer srv.Stop() - // tell the server to connect. - connAddr := newPeerAddr(listener.Addr(), nil) + // tell the server to connect + tcpAddr := listener.Addr().(*net.TCPAddr) + connAddr := &discover.Node{Addr: &net.UDPAddr{IP: tcpAddr.IP, Port: tcpAddr.Port}} srv.peerConnect <- connAddr select { case conn := <-accepted: select { case peer := <-connected: - if peer.conn.RemoteAddr().String() != conn.LocalAddr().String() { + if peer.RemoteAddr().String() != conn.LocalAddr().String() { t.Errorf("peer started with wrong conn: got %v, want %v", - peer.conn.RemoteAddr(), conn.LocalAddr()) - } - if peer.dialAddr != connAddr { - t.Errorf("peer started with wrong dialAddr: got %v, want %v", - peer.dialAddr, connAddr) + peer.RemoteAddr(), conn.LocalAddr()) } + // TODO: validate more fields case <-time.After(1 * time.Second): t.Error("server did not launch peer within one second") } @@ -118,16 +114,16 @@ func TestServerDial(t *testing.T) { func TestServerBroadcast(t *testing.T) { defer testlog(t).detach() + var connected sync.WaitGroup - srv := startTestServer(t, func(srv *Server, c net.Conn, dialAddr *peerAddr) *Peer { - peer := newPeer(c, []Protocol{discard}, dialAddr) - peer.startSubprotocols([]Cap{discard.cap()}) + srv := startTestServer(t, func(p *Peer) { + p.protocols = []Protocol{discard} + p.startSubprotocols([]Cap{discard.cap()}) connected.Done() - return peer }) defer srv.Stop() - // dial a bunch of conns + // create a few peers var conns = make([]net.Conn, 8) connected.Add(len(conns)) deadline := time.Now().Add(3 * time.Second) @@ -159,3 +155,18 @@ func TestServerBroadcast(t *testing.T) { } } } + +func newkey() *ecdsa.PrivateKey { + key, err := crypto.GenerateKey() + if err != nil { + panic("couldn't generate key: " + err.Error()) + } + return key +} + +func randomID() (id discover.NodeID) { + for i := range id { + id[i] = byte(rand.Intn(255)) + } + return id +} diff --git a/p2p/testlog_test.go b/p2p/testlog_test.go index 951d43243e..c524c154c4 100644 --- a/p2p/testlog_test.go +++ b/p2p/testlog_test.go @@ -15,7 +15,7 @@ func testlog(t *testing.T) testLogger { return l } -func (testLogger) GetLogLevel() logger.LogLevel { return logger.DebugLevel } +func (testLogger) GetLogLevel() logger.LogLevel { return logger.DebugDetailLevel } func (testLogger) SetLogLevel(logger.LogLevel) {} func (l testLogger) LogPrint(level logger.LogLevel, msg string) { diff --git a/p2p/testpoc7.go b/p2p/testpoc7.go deleted file mode 100644 index 63b996f79f..0000000000 --- a/p2p/testpoc7.go +++ /dev/null @@ -1,40 +0,0 @@ -// +build none - -package main - -import ( - "fmt" - "log" - "net" - "os" - - "github.com/ethereum/go-ethereum/crypto/secp256k1" - "github.com/ethereum/go-ethereum/logger" - "github.com/ethereum/go-ethereum/p2p" -) - -func main() { - logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.DebugLevel)) - - pub, _ := secp256k1.GenerateKeyPair() - srv := p2p.Server{ - MaxPeers: 10, - Identity: p2p.NewSimpleClientIdentity("test", "1.0", "", string(pub)), - ListenAddr: ":30303", - NAT: p2p.PMP(net.ParseIP("10.0.0.1")), - } - if err := srv.Start(); err != nil { - fmt.Println("could not start server:", err) - os.Exit(1) - } - - // add seed peers - seed, err := net.ResolveTCPAddr("tcp", "poc-7.ethdev.com:30303") - if err != nil { - fmt.Println("couldn't resolve:", err) - os.Exit(1) - } - srv.SuggestPeer(seed.IP, seed.Port, nil) - - select {} -} From 8e8ec8f5f8974aafeac5e4a9ead76878fe22cefd Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Thu, 5 Feb 2015 03:15:05 +0100 Subject: [PATCH 31/54] cmd/peerserver: is gone Will be back soon. Maybe. --- cmd/peerserver/main.go | 58 ------------------------------------------ 1 file changed, 58 deletions(-) delete mode 100644 cmd/peerserver/main.go diff --git a/cmd/peerserver/main.go b/cmd/peerserver/main.go deleted file mode 100644 index 341c4dbb9d..0000000000 --- a/cmd/peerserver/main.go +++ /dev/null @@ -1,58 +0,0 @@ -/* - This file is part of go-ethereum - - go-ethereum is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, either version 3 of the License, or - (at your option) any later version. - - go-ethereum is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with go-ethereum. If not, see . -*/ -package main - -import ( - "crypto/elliptic" - "flag" - "log" - "os" - - "github.com/ethereum/go-ethereum/crypto" - "github.com/ethereum/go-ethereum/logger" - "github.com/ethereum/go-ethereum/p2p" -) - -var ( - natType = flag.String("nat", "", "NAT traversal implementation") - pmpGateway = flag.String("gateway", "", "gateway address for NAT-PMP") - listenAddr = flag.String("addr", ":30301", "listen address") -) - -func main() { - flag.Parse() - nat, err := p2p.ParseNAT(*natType, *pmpGateway) - if err != nil { - log.Fatal("invalid nat:", err) - } - - logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.InfoLevel)) - key, _ := crypto.GenerateKey() - marshaled := elliptic.Marshal(crypto.S256(), key.PublicKey.X, key.PublicKey.Y) - - srv := p2p.Server{ - MaxPeers: 100, - Identity: p2p.NewSimpleClientIdentity("Ethereum(G)", "0.1", "Peer Server Two", marshaled), - ListenAddr: *listenAddr, - NAT: nat, - NoDial: true, - } - if err := srv.Start(); err != nil { - log.Fatal("could not start server:", err) - } - select {} -} From 56f777b2fc77275bc636562b66a08b19afe2ec56 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Thu, 5 Feb 2015 03:16:16 +0100 Subject: [PATCH 32/54] cmd/ethereum, cmd/mist, core, eth, javascript, xeth: fixes for new p2p API --- cmd/ethereum/main.go | 5 +- cmd/mist/assets/qml/main.qml | 14 +++++- cmd/mist/assets/qml/views/info.qml | 12 ----- cmd/mist/bindings.go | 9 ---- cmd/mist/gui.go | 25 +++++----- cmd/mist/main.go | 6 +-- cmd/mist/ui_lib.go | 10 +++- cmd/utils/cmd.go | 6 +-- core/block_processor.go | 1 - core/helper_test.go | 8 ---- eth/backend.go | 73 ++++++++++++------------------ eth/protocol.go | 3 +- eth/protocol_test.go | 24 ++-------- javascript/javascript_runtime.go | 12 ++++- xeth/types.go | 2 +- xeth/xeth.go | 1 - 16 files changed, 86 insertions(+), 125 deletions(-) diff --git a/cmd/ethereum/main.go b/cmd/ethereum/main.go index 4b16fb79fb..faac0bc5dd 100644 --- a/cmd/ethereum/main.go +++ b/cmd/ethereum/main.go @@ -31,6 +31,7 @@ import ( "github.com/ethereum/go-ethereum/eth" "github.com/ethereum/go-ethereum/ethutil" "github.com/ethereum/go-ethereum/logger" + "github.com/ethereum/go-ethereum/p2p" "github.com/ethereum/go-ethereum/state" ) @@ -61,13 +62,11 @@ func main() { utils.InitConfig(VmType, ConfigFile, Datadir, "ETH") ethereum, err := eth.New(ð.Config{ - Name: ClientIdentifier, - Version: Version, + Name: p2p.MakeName(ClientIdentifier, Version), KeyStore: KeyStore, DataDir: Datadir, LogFile: LogFile, LogLevel: LogLevel, - Identifier: Identifier, MaxPeers: MaxPeer, Port: OutboundPort, NATType: PMPGateway, diff --git a/cmd/mist/assets/qml/main.qml b/cmd/mist/assets/qml/main.qml index 357e408466..b1d3f2d192 100644 --- a/cmd/mist/assets/qml/main.qml +++ b/cmd/mist/assets/qml/main.qml @@ -844,6 +844,7 @@ ApplicationWindow { minimumHeight: 50 title: "Connect to peer" + ComboBox { id: addrField anchors.verticalCenter: parent.verticalCenter @@ -872,6 +873,17 @@ ApplicationWindow { } } + ComboBox { + id: nodeidField + anchors.verticalCenter: parent.verticalCenter + anchors.left: parent.left + anchors.right: addPeerButton.left + anchors.leftMargin: 10 + anchors.rightMargin: 10 + + editable: true + } + Button { id: addPeerButton anchors.right: parent.right @@ -879,7 +891,7 @@ ApplicationWindow { anchors.rightMargin: 10 text: "Add" onClicked: { - eth.connectToPeer(addrField.currentText) + eth.connectToPeer(addrField.currentText, nodeidField.currentText) addPeerWin.visible = false } } diff --git a/cmd/mist/assets/qml/views/info.qml b/cmd/mist/assets/qml/views/info.qml index 14ee0bce15..b2d2f521c9 100644 --- a/cmd/mist/assets/qml/views/info.qml +++ b/cmd/mist/assets/qml/views/info.qml @@ -32,18 +32,6 @@ Rectangle { width: 500 } - Label { - text: "Client ID" - } - TextField { - text: gui.getCustomIdentifier() - width: 500 - placeholderText: "Anonymous" - onTextChanged: { - gui.setCustomIdentifier(text) - } - } - TextArea { objectName: "statsPane" width: parent.width diff --git a/cmd/mist/bindings.go b/cmd/mist/bindings.go index 706c789b17..9623538a39 100644 --- a/cmd/mist/bindings.go +++ b/cmd/mist/bindings.go @@ -64,15 +64,6 @@ func (gui *Gui) Transact(recipient, value, gas, gasPrice, d string) (string, err return gui.xeth.Transact(recipient, value, gas, gasPrice, data) } -func (gui *Gui) SetCustomIdentifier(customIdentifier string) { - gui.clientIdentity.SetCustomIdentifier(customIdentifier) - gui.config.Save("id", customIdentifier) -} - -func (gui *Gui) GetCustomIdentifier() string { - return gui.clientIdentity.GetCustomIdentifier() -} - // functions that allow Gui to implement interface guilogger.LogSystem func (gui *Gui) SetLogLevel(level logger.LogLevel) { gui.logLevel = level diff --git a/cmd/mist/gui.go b/cmd/mist/gui.go index edc799abc4..dee99859c1 100644 --- a/cmd/mist/gui.go +++ b/cmd/mist/gui.go @@ -41,7 +41,6 @@ import ( "github.com/ethereum/go-ethereum/ethutil" "github.com/ethereum/go-ethereum/logger" "github.com/ethereum/go-ethereum/miner" - "github.com/ethereum/go-ethereum/p2p" "github.com/ethereum/go-ethereum/ui/qt/qwhisper" "github.com/ethereum/go-ethereum/xeth" "github.com/obscuren/qml" @@ -77,9 +76,8 @@ type Gui struct { xeth *xeth.XEth - Session string - clientIdentity *p2p.SimpleClientIdentity - config *ethutil.ConfigManager + Session string + config *ethutil.ConfigManager plugins map[string]plugin @@ -87,7 +85,7 @@ type Gui struct { } // Create GUI, but doesn't start it -func NewWindow(ethereum *eth.Ethereum, config *ethutil.ConfigManager, clientIdentity *p2p.SimpleClientIdentity, session string, logLevel int) *Gui { +func NewWindow(ethereum *eth.Ethereum, config *ethutil.ConfigManager, session string, logLevel int) *Gui { db, err := ethdb.NewLDBDatabase("tx_database") if err != nil { panic(err) @@ -95,15 +93,14 @@ func NewWindow(ethereum *eth.Ethereum, config *ethutil.ConfigManager, clientIden xeth := xeth.New(ethereum) gui := &Gui{eth: ethereum, - txDb: db, - xeth: xeth, - logLevel: logger.LogLevel(logLevel), - Session: session, - open: false, - clientIdentity: clientIdentity, - config: config, - plugins: make(map[string]plugin), - serviceEvents: make(chan ServEv, 1), + txDb: db, + xeth: xeth, + logLevel: logger.LogLevel(logLevel), + Session: session, + open: false, + config: config, + plugins: make(map[string]plugin), + serviceEvents: make(chan ServEv, 1), } data, _ := ethutil.ReadAllFile(path.Join(ethutil.Config.ExecPath, "plugins.json")) json.Unmarshal([]byte(data), &gui.plugins) diff --git a/cmd/mist/main.go b/cmd/mist/main.go index 66872a2415..17ab9467a6 100644 --- a/cmd/mist/main.go +++ b/cmd/mist/main.go @@ -52,13 +52,11 @@ func run() error { config := utils.InitConfig(VmType, ConfigFile, Datadir, "ETH") ethereum, err := eth.New(ð.Config{ - Name: ClientIdentifier, - Version: Version, + Name: p2p.MakeName(ClientIdentifier, Version), KeyStore: KeyStore, DataDir: Datadir, LogFile: LogFile, LogLevel: LogLevel, - Identifier: Identifier, MaxPeers: MaxPeer, Port: OutboundPort, NATType: PMPGateway, @@ -79,7 +77,7 @@ func run() error { utils.StartWebSockets(ethereum, WsPort) } - gui := NewWindow(ethereum, config, ethereum.ClientIdentity().(*p2p.SimpleClientIdentity), KeyRing, LogLevel) + gui := NewWindow(ethereum, config, KeyRing, LogLevel) utils.RegisterInterrupt(func(os.Signal) { gui.Stop() diff --git a/cmd/mist/ui_lib.go b/cmd/mist/ui_lib.go index 7c5802076a..2e557dba90 100644 --- a/cmd/mist/ui_lib.go +++ b/cmd/mist/ui_lib.go @@ -31,6 +31,7 @@ import ( "github.com/ethereum/go-ethereum/event/filter" "github.com/ethereum/go-ethereum/javascript" "github.com/ethereum/go-ethereum/miner" + "github.com/ethereum/go-ethereum/p2p/discover" "github.com/ethereum/go-ethereum/xeth" "github.com/obscuren/qml" ) @@ -142,8 +143,13 @@ func (ui *UiLib) Connect(button qml.Object) { } } -func (ui *UiLib) ConnectToPeer(addr string) { - if err := ui.eth.SuggestPeer(addr); err != nil { +func (ui *UiLib) ConnectToPeer(addr string, hexid string) { + id, err := discover.HexID(hexid) + if err != nil { + guilogger.Errorf("bad node ID: %v", err) + return + } + if err := ui.eth.SuggestPeer(addr, id); err != nil { guilogger.Infoln(err) } } diff --git a/cmd/utils/cmd.go b/cmd/utils/cmd.go index 70df289c38..2f48bced5b 100644 --- a/cmd/utils/cmd.go +++ b/cmd/utils/cmd.go @@ -122,12 +122,10 @@ func exit(err error) { } func StartEthereum(ethereum *eth.Ethereum, SeedNode string) { - clilogger.Infof("Starting %s", ethereum.ClientIdentity()) - err := ethereum.Start(SeedNode) - if err != nil { + clilogger.Infoln("Starting ", ethereum.Name()) + if err := ethereum.Start(SeedNode); err != nil { exit(err) } - RegisterInterrupt(func(sig os.Signal) { ethereum.Stop() logger.Flush() diff --git a/core/block_processor.go b/core/block_processor.go index 6db3c25f5a..e6d4a1cdac 100644 --- a/core/block_processor.go +++ b/core/block_processor.go @@ -34,7 +34,6 @@ type EthManager interface { IsListening() bool Peers() []*p2p.Peer KeyManager() *crypto.KeyManager - ClientIdentity() p2p.ClientIdentity Db() ethutil.Database EventMux() *event.TypeMux } diff --git a/core/helper_test.go b/core/helper_test.go index 7b41b86f15..473576e3f1 100644 --- a/core/helper_test.go +++ b/core/helper_test.go @@ -9,7 +9,6 @@ import ( "github.com/ethereum/go-ethereum/ethdb" "github.com/ethereum/go-ethereum/ethutil" "github.com/ethereum/go-ethereum/event" - "github.com/ethereum/go-ethereum/p2p" ) // Implement our EthTest Manager @@ -54,13 +53,6 @@ func (tm *TestManager) TxPool() *TxPool { func (tm *TestManager) EventMux() *event.TypeMux { return tm.eventMux } -func (tm *TestManager) Broadcast(msgType p2p.Msg, data []interface{}) { - fmt.Println("Broadcast not implemented") -} - -func (tm *TestManager) ClientIdentity() p2p.ClientIdentity { - return nil -} func (tm *TestManager) KeyManager() *crypto.KeyManager { return nil } diff --git a/eth/backend.go b/eth/backend.go index 43e7574358..08052c15d9 100644 --- a/eth/backend.go +++ b/eth/backend.go @@ -12,20 +12,19 @@ import ( "github.com/ethereum/go-ethereum/event" ethlogger "github.com/ethereum/go-ethereum/logger" "github.com/ethereum/go-ethereum/p2p" + "github.com/ethereum/go-ethereum/p2p/discover" "github.com/ethereum/go-ethereum/pow/ezp" "github.com/ethereum/go-ethereum/rpc" "github.com/ethereum/go-ethereum/whisper" ) type Config struct { - Name string - Version string - Identifier string - KeyStore string - DataDir string - LogFile string - LogLevel int - KeyRing string + Name string + KeyStore string + DataDir string + LogFile string + LogLevel int + KeyRing string MaxPeers int Port string @@ -66,8 +65,7 @@ type Ethereum struct { WsServer rpc.RpcServer keyManager *crypto.KeyManager - clientIdentity p2p.ClientIdentity - logger ethlogger.LogSystem + logger ethlogger.LogSystem synclock sync.Mutex syncGroup sync.WaitGroup @@ -103,21 +101,17 @@ func New(config *Config) (*Ethereum, error) { // Initialise the keyring keyManager.Init(config.KeyRing, 0, false) - // Create a new client id for this instance. This will help identifying the node on the network - clientId := p2p.NewSimpleClientIdentity(config.Name, config.Version, config.Identifier, keyManager.PublicKey()) - saveProtocolVersion(db) //ethutil.Config.Db = db eth := &Ethereum{ - shutdownChan: make(chan bool), - quit: make(chan bool), - db: db, - keyManager: keyManager, - clientIdentity: clientId, - blacklist: p2p.NewBlacklist(), - eventMux: &event.TypeMux{}, - logger: logger, + shutdownChan: make(chan bool), + quit: make(chan bool), + db: db, + keyManager: keyManager, + blacklist: p2p.NewBlacklist(), + eventMux: &event.TypeMux{}, + logger: logger, } eth.chainManager = core.NewChainManager(db, eth.EventMux()) @@ -132,21 +126,23 @@ func New(config *Config) (*Ethereum, error) { ethProto := EthProtocol(eth.txPool, eth.chainManager, eth.blockPool) protocols := []p2p.Protocol{ethProto, eth.whisper.Protocol()} - nat, err := p2p.ParseNAT(config.NATType, config.PMPGateway) if err != nil { return nil, err } - + netprv, err := crypto.GenerateKey() + if err != nil { + return nil, fmt.Errorf("could not generate server key: %v", err) + } eth.net = &p2p.Server{ - Identity: clientId, - MaxPeers: config.MaxPeers, - Protocols: protocols, - Blacklist: eth.blacklist, - NAT: nat, - NoDial: !config.Dial, + PrivateKey: netprv, + Name: config.Name, + MaxPeers: config.MaxPeers, + Protocols: protocols, + Blacklist: eth.blacklist, + NAT: nat, + NoDial: !config.Dial, } - if len(config.Port) > 0 { eth.net.ListenAddr = ":" + config.Port } @@ -162,8 +158,8 @@ func (s *Ethereum) Logger() ethlogger.LogSystem { return s.logger } -func (s *Ethereum) ClientIdentity() p2p.ClientIdentity { - return s.clientIdentity +func (s *Ethereum) Name() string { + return s.net.Name } func (s *Ethereum) ChainManager() *core.ChainManager { @@ -241,26 +237,17 @@ func (s *Ethereum) Start(seedNode string) error { s.blockSub = s.eventMux.Subscribe(core.NewMinedBlockEvent{}) go s.blockBroadcastLoop() - // TODO: read peers here - if len(seedNode) > 0 { - logger.Infof("Connect to seed node %v", seedNode) - if err := s.SuggestPeer(seedNode); err != nil { - logger.Infoln(err) - } - } - logger.Infoln("Server started") return nil } -func (self *Ethereum) SuggestPeer(addr string) error { +func (self *Ethereum) SuggestPeer(addr string, id discover.NodeID) error { netaddr, err := net.ResolveTCPAddr("tcp", addr) if err != nil { logger.Errorf("couldn't resolve %s:", addr, err) return err } - - self.net.SuggestPeer(netaddr.IP, netaddr.Port, nil) + self.net.SuggestPeer(netaddr.IP, netaddr.Port, id) return nil } diff --git a/eth/protocol.go b/eth/protocol.go index d7a7fa9107..fb694c877a 100644 --- a/eth/protocol.go +++ b/eth/protocol.go @@ -92,13 +92,14 @@ func EthProtocol(txPool txPool, chainManager chainManager, blockPool blockPool) // the main loop that handles incoming messages // note RemovePeer in the post-disconnect hook func runEthProtocol(txPool txPool, chainManager chainManager, blockPool blockPool, peer *p2p.Peer, rw p2p.MsgReadWriter) (err error) { + id := peer.ID() self := ðProtocol{ txPool: txPool, chainManager: chainManager, blockPool: blockPool, rw: rw, peer: peer, - id: fmt.Sprintf("%x", peer.Identity().Pubkey()[:8]), + id: fmt.Sprintf("%x", id[:8]), } err = self.handleStatus() if err == nil { diff --git a/eth/protocol_test.go b/eth/protocol_test.go index 1fe6d8f6b1..a91806a1c6 100644 --- a/eth/protocol_test.go +++ b/eth/protocol_test.go @@ -14,6 +14,7 @@ import ( "github.com/ethereum/go-ethereum/ethutil" ethlogger "github.com/ethereum/go-ethereum/logger" "github.com/ethereum/go-ethereum/p2p" + "github.com/ethereum/go-ethereum/p2p/discover" ) var sys = ethlogger.NewStdLogSystem(os.Stdout, log.LstdFlags, ethlogger.LogLevel(ethlogger.DebugDetailLevel)) @@ -128,26 +129,11 @@ func (self *testBlockPool) RemovePeer(peerId string) { } } -// TODO: refactor this into p2p/client_identity -type peerId struct { - pubkey []byte -} - -func (self *peerId) String() string { - return "test peer" -} - -func (self *peerId) Pubkey() (pubkey []byte) { - pubkey = self.pubkey - if len(pubkey) == 0 { - pubkey = crypto.GenerateNewKeyPair().PublicKey - self.pubkey = pubkey - } - return -} - func testPeer() *p2p.Peer { - return p2p.NewPeer(&peerId{}, []p2p.Cap{}) + var id discover.NodeID + pk := crypto.GenerateNewKeyPair().PublicKey + copy(id[:], pk) + return p2p.NewPeer(id, "test peer", []p2p.Cap{}) } type ethProtocolTester struct { diff --git a/javascript/javascript_runtime.go b/javascript/javascript_runtime.go index 398daf43aa..a09aff027a 100644 --- a/javascript/javascript_runtime.go +++ b/javascript/javascript_runtime.go @@ -14,6 +14,7 @@ import ( "github.com/ethereum/go-ethereum/ethutil" "github.com/ethereum/go-ethereum/event" "github.com/ethereum/go-ethereum/logger" + "github.com/ethereum/go-ethereum/p2p/discover" "github.com/ethereum/go-ethereum/state" "github.com/ethereum/go-ethereum/xeth" "github.com/obscuren/otto" @@ -201,8 +202,15 @@ func (self *JSRE) addPeer(call otto.FunctionCall) otto.Value { if err != nil { return otto.FalseValue() } - self.ethereum.SuggestPeer(host) - + idstr, err := call.Argument(0).ToString() + if err != nil { + return otto.FalseValue() + } + id, err := discover.HexID(idstr) + if err != nil { + return otto.FalseValue() + } + self.ethereum.SuggestPeer(host, id) return otto.TrueValue() } diff --git a/xeth/types.go b/xeth/types.go index 34caf5cbce..2c6c526758 100644 --- a/xeth/types.go +++ b/xeth/types.go @@ -215,7 +215,7 @@ func NewPeer(peer *p2p.Peer) *Peer { return &Peer{ ref: peer, Ip: fmt.Sprintf("%v", peer.RemoteAddr()), - Version: fmt.Sprintf("%v", peer.Identity()), + Version: fmt.Sprintf("%v", peer.ID()), Caps: fmt.Sprintf("%v", caps), } } diff --git a/xeth/xeth.go b/xeth/xeth.go index 0e71a0ed92..02e68e6970 100644 --- a/xeth/xeth.go +++ b/xeth/xeth.go @@ -31,7 +31,6 @@ type Backend interface { IsListening() bool Peers() []*p2p.Peer KeyManager() *crypto.KeyManager - ClientIdentity() p2p.ClientIdentity Db() ethutil.Database EventMux() *event.TypeMux Whisper() *whisper.Whisper From 8564eb9f7efcc7a0e639f6a45d7e67037fedac5f Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Fri, 6 Feb 2015 14:40:53 +0100 Subject: [PATCH 33/54] p2p/discover: add node URL functions, distinguish TCP/UDP ports The discovery RPC protocol does not yet distinguish TCP and UDP ports. But it can't hurt to do so in our internal model. --- p2p/discover/node.go | 289 +++++++++++++++++++++++++++++++++++++ p2p/discover/node_test.go | 201 ++++++++++++++++++++++++++ p2p/discover/table.go | 197 +------------------------ p2p/discover/table_test.go | 116 +-------------- p2p/discover/udp.go | 32 ++-- p2p/discover/udp_test.go | 13 +- p2p/server.go | 7 +- p2p/server_test.go | 3 +- 8 files changed, 532 insertions(+), 326 deletions(-) create mode 100644 p2p/discover/node.go create mode 100644 p2p/discover/node_test.go diff --git a/p2p/discover/node.go b/p2p/discover/node.go new file mode 100644 index 0000000000..a49a2f5473 --- /dev/null +++ b/p2p/discover/node.go @@ -0,0 +1,289 @@ +package discover + +import ( + "crypto/ecdsa" + "crypto/elliptic" + "encoding/hex" + "errors" + "fmt" + "io" + "math/rand" + "net" + "net/url" + "strconv" + "strings" + "time" + + "github.com/ethereum/go-ethereum/crypto/secp256k1" + "github.com/ethereum/go-ethereum/rlp" +) + +// Node represents a host on the network. +type Node struct { + ID NodeID + IP net.IP + + DiscPort int // UDP listening port for discovery protocol + TCPPort int // TCP listening port for RLPx + + active time.Time +} + +func newNode(id NodeID, addr *net.UDPAddr) *Node { + return &Node{ + ID: id, + IP: addr.IP, + DiscPort: addr.Port, + TCPPort: addr.Port, + active: time.Now(), + } +} + +func (n *Node) isValid() bool { + // TODO: don't accept localhost, LAN addresses from internet hosts + return !n.IP.IsMulticast() && !n.IP.IsUnspecified() && n.TCPPort != 0 && n.DiscPort != 0 +} + +// The string representation of a Node is a URL. +// Please see ParseNode for a description of the format. +func (n *Node) String() string { + addr := net.TCPAddr{IP: n.IP, Port: n.TCPPort} + u := url.URL{ + Scheme: "enode", + User: url.User(fmt.Sprintf("%x", n.ID[:])), + Host: addr.String(), + } + if n.DiscPort != n.TCPPort { + u.RawQuery = "discport=" + strconv.Itoa(n.DiscPort) + } + return u.String() +} + +// ParseNode parses a node URL. +// +// A node URL has scheme "enode". +// +// The hexadecimal node ID is encoded in the username portion of the +// URL, separated from the host by an @ sign. The hostname can only be +// given as an IP address, DNS domain names are not allowed. The port +// in the host name section is the TCP listening port. If the TCP and +// UDP (discovery) ports differ, the UDP port is specified as query +// parameter "discport". +// +// In the following example, the node URL describes +// a node with IP address 10.3.58.6, TCP listening port 30303 +// and UDP discovery port 30301. +// +// enode://@10.3.58.6:30303?discport=30301 +func ParseNode(rawurl string) (*Node, error) { + var n Node + u, err := url.Parse(rawurl) + if u.Scheme != "enode" { + return nil, errors.New("invalid URL scheme, want \"enode\"") + } + if u.User == nil { + return nil, errors.New("does not contain node ID") + } + if n.ID, err = HexID(u.User.String()); err != nil { + return nil, fmt.Errorf("invalid node ID (%v)", err) + } + ip, port, err := net.SplitHostPort(u.Host) + if err != nil { + return nil, fmt.Errorf("invalid host: %v", err) + } + if n.IP = net.ParseIP(ip); n.IP == nil { + return nil, errors.New("invalid IP address") + } + if n.TCPPort, err = strconv.Atoi(port); err != nil { + return nil, errors.New("invalid port") + } + qv := u.Query() + if qv.Get("discport") == "" { + n.DiscPort = n.TCPPort + } else { + if n.DiscPort, err = strconv.Atoi(qv.Get("discport")); err != nil { + return nil, errors.New("invalid discport in query") + } + } + return &n, nil +} + +// MustParseNode parses a node URL. It panics if the URL is not valid. +func MustParseNode(rawurl string) *Node { + n, err := ParseNode(rawurl) + if err != nil { + panic("invalid node URL: " + err.Error()) + } + return n +} + +func (n Node) EncodeRLP(w io.Writer) error { + return rlp.Encode(w, rpcNode{IP: n.IP.String(), Port: uint16(n.TCPPort), ID: n.ID}) +} +func (n *Node) DecodeRLP(s *rlp.Stream) (err error) { + var ext rpcNode + if err = s.Decode(&ext); err == nil { + n.TCPPort = int(ext.Port) + n.DiscPort = int(ext.Port) + n.ID = ext.ID + if n.IP = net.ParseIP(ext.IP); n.IP == nil { + return errors.New("invalid IP string") + } + } + return err +} + +// NodeID is a unique identifier for each node. +// The node identifier is a marshaled elliptic curve public key. +type NodeID [512 / 8]byte + +// NodeID prints as a long hexadecimal number. +func (n NodeID) String() string { + return fmt.Sprintf("%#x", n[:]) +} + +// The Go syntax representation of a NodeID is a call to HexID. +func (n NodeID) GoString() string { + return fmt.Sprintf("discover.HexID(\"%#x\")", n[:]) +} + +// HexID converts a hex string to a NodeID. +// The string may be prefixed with 0x. +func HexID(in string) (NodeID, error) { + if strings.HasPrefix(in, "0x") { + in = in[2:] + } + var id NodeID + b, err := hex.DecodeString(in) + if err != nil { + return id, err + } else if len(b) != len(id) { + return id, fmt.Errorf("wrong length, need %d hex bytes", len(id)) + } + copy(id[:], b) + return id, nil +} + +// MustHexID converts a hex string to a NodeID. +// It panics if the string is not a valid NodeID. +func MustHexID(in string) NodeID { + id, err := HexID(in) + if err != nil { + panic(err) + } + return id +} + +// PubkeyID returns a marshaled representation of the given public key. +func PubkeyID(pub *ecdsa.PublicKey) NodeID { + var id NodeID + pbytes := elliptic.Marshal(pub.Curve, pub.X, pub.Y) + if len(pbytes)-1 != len(id) { + panic(fmt.Errorf("need %d bit pubkey, got %d bits", (len(id)+1)*8, len(pbytes))) + } + copy(id[:], pbytes[1:]) + return id +} + +// recoverNodeID computes the public key used to sign the +// given hash from the signature. +func recoverNodeID(hash, sig []byte) (id NodeID, err error) { + pubkey, err := secp256k1.RecoverPubkey(hash, sig) + if err != nil { + return id, err + } + if len(pubkey)-1 != len(id) { + return id, fmt.Errorf("recovered pubkey has %d bits, want %d bits", len(pubkey)*8, (len(id)+1)*8) + } + for i := range id { + id[i] = pubkey[i+1] + } + return id, nil +} + +// distcmp compares the distances a->target and b->target. +// Returns -1 if a is closer to target, 1 if b is closer to target +// and 0 if they are equal. +func distcmp(target, a, b NodeID) int { + for i := range target { + da := a[i] ^ target[i] + db := b[i] ^ target[i] + if da > db { + return 1 + } else if da < db { + return -1 + } + } + return 0 +} + +// table of leading zero counts for bytes [0..255] +var lzcount = [256]int{ + 8, 7, 6, 6, 5, 5, 5, 5, + 4, 4, 4, 4, 4, 4, 4, 4, + 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 3, + 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, +} + +// logdist returns the logarithmic distance between a and b, log2(a ^ b). +func logdist(a, b NodeID) int { + lz := 0 + for i := range a { + x := a[i] ^ b[i] + if x == 0 { + lz += 8 + } else { + lz += lzcount[x] + break + } + } + return len(a)*8 - lz +} + +// randomID returns a random NodeID such that logdist(a, b) == n +func randomID(a NodeID, n int) (b NodeID) { + if n == 0 { + return a + } + // flip bit at position n, fill the rest with random bits + b = a + pos := len(a) - n/8 - 1 + bit := byte(0x01) << (byte(n%8) - 1) + if bit == 0 { + pos++ + bit = 0x80 + } + b[pos] = a[pos]&^bit | ^a[pos]&bit // TODO: randomize end bits + for i := pos + 1; i < len(a); i++ { + b[i] = byte(rand.Intn(255)) + } + return b +} diff --git a/p2p/discover/node_test.go b/p2p/discover/node_test.go new file mode 100644 index 0000000000..ae82ae4f11 --- /dev/null +++ b/p2p/discover/node_test.go @@ -0,0 +1,201 @@ +package discover + +import ( + "math/big" + "math/rand" + "net" + "reflect" + "testing" + "testing/quick" + "time" + + "github.com/ethereum/go-ethereum/crypto" +) + +var ( + quickrand = rand.New(rand.NewSource(time.Now().Unix())) + quickcfg = &quick.Config{MaxCount: 5000, Rand: quickrand} +) + +var parseNodeTests = []struct { + rawurl string + wantError string + wantResult *Node +}{ + { + rawurl: "http://foobar", + wantError: `invalid URL scheme, want "enode"`, + }, + { + rawurl: "enode://foobar", + wantError: `does not contain node ID`, + }, + { + rawurl: "enode://01010101@123.124.125.126:3", + wantError: `invalid node ID (wrong length, need 64 hex bytes)`, + }, + { + rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@hostname:3", + wantError: `invalid IP address`, + }, + { + rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@127.0.0.1:foo", + wantError: `invalid port`, + }, + { + rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@127.0.0.1:3?discport=foo", + wantError: `invalid discport in query`, + }, + { + rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@127.0.0.1:52150", + wantResult: &Node{ + ID: MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), + IP: net.ParseIP("127.0.0.1"), + DiscPort: 52150, + TCPPort: 52150, + }, + }, + { + rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@[::]:52150", + wantResult: &Node{ + ID: MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), + IP: net.ParseIP("::"), + DiscPort: 52150, + TCPPort: 52150, + }, + }, + { + rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@127.0.0.1:52150?discport=223344", + wantResult: &Node{ + ID: MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"), + IP: net.ParseIP("127.0.0.1"), + DiscPort: 223344, + TCPPort: 52150, + }, + }, +} + +func TestParseNode(t *testing.T) { + for i, test := range parseNodeTests { + n, err := ParseNode(test.rawurl) + if err == nil && test.wantError != "" { + t.Errorf("test %d: got nil error, expected %#q", i, test.wantError) + continue + } + if err != nil && err.Error() != test.wantError { + t.Errorf("test %d: got error %#q, expected %#q", i, err.Error(), test.wantError) + continue + } + if !reflect.DeepEqual(n, test.wantResult) { + t.Errorf("test %d: result mismatch:\ngot: %#v, want: %#v", i, n, test.wantResult) + } + } +} + +func TestNodeString(t *testing.T) { + for i, test := range parseNodeTests { + if test.wantError != "" { + continue + } + str := test.wantResult.String() + if str != test.rawurl { + t.Errorf("test %d: Node.String() mismatch:\ngot: %s\nwant: %s", i, str, test.rawurl) + } + } +} + +func TestHexID(t *testing.T) { + ref := NodeID{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 106, 217, 182, 31, 165, 174, 1, 67, 7, 235, 220, 150, 66, 83, 173, 205, 159, 44, 10, 57, 42, 161, 26, 188} + id1 := MustHexID("0x000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc") + id2 := MustHexID("000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc") + + if id1 != ref { + t.Errorf("wrong id1\ngot %v\nwant %v", id1[:], ref[:]) + } + if id2 != ref { + t.Errorf("wrong id2\ngot %v\nwant %v", id2[:], ref[:]) + } +} + +func TestNodeID_recover(t *testing.T) { + prv := newkey() + hash := make([]byte, 32) + sig, err := crypto.Sign(hash, prv) + if err != nil { + t.Fatalf("signing error: %v", err) + } + + pub := PubkeyID(&prv.PublicKey) + recpub, err := recoverNodeID(hash, sig) + if err != nil { + t.Fatalf("recovery error: %v", err) + } + if pub != recpub { + t.Errorf("recovered wrong pubkey:\ngot: %v\nwant: %v", recpub, pub) + } +} + +func TestNodeID_distcmp(t *testing.T) { + distcmpBig := func(target, a, b NodeID) int { + tbig := new(big.Int).SetBytes(target[:]) + abig := new(big.Int).SetBytes(a[:]) + bbig := new(big.Int).SetBytes(b[:]) + return new(big.Int).Xor(tbig, abig).Cmp(new(big.Int).Xor(tbig, bbig)) + } + if err := quick.CheckEqual(distcmp, distcmpBig, quickcfg); err != nil { + t.Error(err) + } +} + +// the random tests is likely to miss the case where they're equal. +func TestNodeID_distcmpEqual(t *testing.T) { + base := NodeID{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} + x := NodeID{15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0} + if distcmp(base, x, x) != 0 { + t.Errorf("distcmp(base, x, x) != 0") + } +} + +func TestNodeID_logdist(t *testing.T) { + logdistBig := func(a, b NodeID) int { + abig, bbig := new(big.Int).SetBytes(a[:]), new(big.Int).SetBytes(b[:]) + return new(big.Int).Xor(abig, bbig).BitLen() + } + if err := quick.CheckEqual(logdist, logdistBig, quickcfg); err != nil { + t.Error(err) + } +} + +// the random tests is likely to miss the case where they're equal. +func TestNodeID_logdistEqual(t *testing.T) { + x := NodeID{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} + if logdist(x, x) != 0 { + t.Errorf("logdist(x, x) != 0") + } +} + +func TestNodeID_randomID(t *testing.T) { + // we don't use quick.Check here because its output isn't + // very helpful when the test fails. + for i := 0; i < quickcfg.MaxCount; i++ { + a := gen(NodeID{}, quickrand).(NodeID) + dist := quickrand.Intn(len(NodeID{}) * 8) + result := randomID(a, dist) + actualdist := logdist(result, a) + + if dist != actualdist { + t.Log("a: ", a) + t.Log("result:", result) + t.Fatalf("#%d: distance of result is %d, want %d", i, actualdist, dist) + } + } +} + +func (NodeID) Generate(rand *rand.Rand, size int) reflect.Value { + var id NodeID + m := rand.Intn(len(id)) + for i := len(id) - 1; i > m; i-- { + id[i] = byte(rand.Uint32()) + } + return reflect.ValueOf(id) +} diff --git a/p2p/discover/table.go b/p2p/discover/table.go index ea9680404b..6025507ebd 100644 --- a/p2p/discover/table.go +++ b/p2p/discover/table.go @@ -7,20 +7,10 @@ package discover import ( - "crypto/ecdsa" - "crypto/elliptic" - "encoding/hex" - "fmt" - "io" - "math/rand" "net" "sort" - "strings" "sync" "time" - - "github.com/ethereum/go-ethereum/crypto/secp256k1" - "github.com/ethereum/go-ethereum/rlp" ) const ( @@ -53,36 +43,10 @@ type bucket struct { entries []*Node } -// Node represents node metadata that is stored in the table. -type Node struct { - Addr *net.UDPAddr - ID NodeID - - active time.Time -} - -type rpcNode struct { - IP string - Port uint16 - ID NodeID -} - -func (n Node) EncodeRLP(w io.Writer) error { - return rlp.Encode(w, rpcNode{IP: n.Addr.IP.String(), Port: uint16(n.Addr.Port), ID: n.ID}) -} -func (n *Node) DecodeRLP(s *rlp.Stream) (err error) { - var ext rpcNode - if err = s.Decode(&ext); err == nil { - n.Addr = &net.UDPAddr{IP: net.ParseIP(ext.IP), Port: int(ext.Port)} - n.ID = ext.ID - } - return err -} - func newTable(t transport, ourID NodeID, ourAddr *net.UDPAddr) *Table { - tab := &Table{net: t, self: &Node{ID: ourID, Addr: ourAddr}} + tab := &Table{net: t, self: newNode(ourID, ourAddr)} for i := range tab.buckets { - tab.buckets[i] = &bucket{} + tab.buckets[i] = new(bucket) } return tab } @@ -217,7 +181,7 @@ func (tab *Table) len() (n int) { func (tab *Table) bumpOrAdd(node NodeID, from *net.UDPAddr) (n *Node) { b := tab.buckets[logdist(tab.self.ID, node)] if n = b.bump(node); n == nil { - n = &Node{ID: node, Addr: from, active: time.Now()} + n = newNode(node, from) if len(b.entries) == bucketSize { tab.pingReplace(n, b) } else { @@ -238,6 +202,7 @@ func (tab *Table) pingReplace(n *Node, b *bucket) { tab.mutex.Lock() if len(b.entries) > 0 && b.entries[len(b.entries)-1] == old { // slide down other entries and put the new one in front. + // TODO: insert in correct position to keep the order copy(b.entries[1:], b.entries) b.entries[0] = n } @@ -312,157 +277,3 @@ func (h *nodesByDistance) push(n *Node, maxElems int) { h.entries[ix] = n } } - -// NodeID is a unique identifier for each node. -// The node identifier is a marshaled elliptic curve public key. -type NodeID [512 / 8]byte - -// NodeID prints as a long hexadecimal number. -func (n NodeID) String() string { - return fmt.Sprintf("%#x", n[:]) -} - -// The Go syntax representation of a NodeID is a call to HexID. -func (n NodeID) GoString() string { - return fmt.Sprintf("HexID(\"%#x\")", n[:]) -} - -// HexID converts a hex string to a NodeID. -// The string may be prefixed with 0x. -func HexID(in string) (NodeID, error) { - if strings.HasPrefix(in, "0x") { - in = in[2:] - } - var id NodeID - b, err := hex.DecodeString(in) - if err != nil { - return id, err - } else if len(b) != len(id) { - return id, fmt.Errorf("wrong length, need %d hex bytes", len(id)) - } - copy(id[:], b) - return id, nil -} - -// MustHexID converts a hex string to a NodeID. -// It panics if the string is not a valid NodeID. -func MustHexID(in string) NodeID { - id, err := HexID(in) - if err != nil { - panic(err) - } - return id -} - -func PubkeyID(pub *ecdsa.PublicKey) NodeID { - var id NodeID - pbytes := elliptic.Marshal(pub.Curve, pub.X, pub.Y) - if len(pbytes)-1 != len(id) { - panic(fmt.Errorf("invalid key: need %d bit pubkey, got %d bits", (len(id)+1)*8, len(pbytes))) - } - copy(id[:], pbytes[1:]) - return id -} - -// recoverNodeID computes the public key used to sign the -// given hash from the signature. -func recoverNodeID(hash, sig []byte) (id NodeID, err error) { - pubkey, err := secp256k1.RecoverPubkey(hash, sig) - if err != nil { - return id, err - } - if len(pubkey)-1 != len(id) { - return id, fmt.Errorf("recovered pubkey has %d bits, want %d bits", len(pubkey)*8, (len(id)+1)*8) - } - for i := range id { - id[i] = pubkey[i+1] - } - return id, nil -} - -// distcmp compares the distances a->target and b->target. -// Returns -1 if a is closer to target, 1 if b is closer to target -// and 0 if they are equal. -func distcmp(target, a, b NodeID) int { - for i := range target { - da := a[i] ^ target[i] - db := b[i] ^ target[i] - if da > db { - return 1 - } else if da < db { - return -1 - } - } - return 0 -} - -// table of leading zero counts for bytes [0..255] -var lzcount = [256]int{ - 8, 7, 6, 6, 5, 5, 5, 5, - 4, 4, 4, 4, 4, 4, 4, 4, - 3, 3, 3, 3, 3, 3, 3, 3, - 3, 3, 3, 3, 3, 3, 3, 3, - 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, - 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, -} - -// logdist returns the logarithmic distance between a and b, log2(a ^ b). -func logdist(a, b NodeID) int { - lz := 0 - for i := range a { - x := a[i] ^ b[i] - if x == 0 { - lz += 8 - } else { - lz += lzcount[x] - break - } - } - return len(a)*8 - lz -} - -// randomID returns a random NodeID such that logdist(a, b) == n -func randomID(a NodeID, n int) (b NodeID) { - if n == 0 { - return a - } - // flip bit at position n, fill the rest with random bits - b = a - pos := len(a) - n/8 - 1 - bit := byte(0x01) << (byte(n%8) - 1) - if bit == 0 { - pos++ - bit = 0x80 - } - b[pos] = a[pos]&^bit | ^a[pos]&bit // TODO: randomize end bits - for i := pos + 1; i < len(a); i++ { - b[i] = byte(rand.Intn(255)) - } - return b -} diff --git a/p2p/discover/table_test.go b/p2p/discover/table_test.go index 90f89b1476..9b05ce7f4b 100644 --- a/p2p/discover/table_test.go +++ b/p2p/discover/table_test.go @@ -4,7 +4,6 @@ import ( "crypto/ecdsa" "errors" "fmt" - "math/big" "math/rand" "net" "reflect" @@ -15,107 +14,6 @@ import ( "github.com/ethereum/go-ethereum/crypto" ) -var ( - quickrand = rand.New(rand.NewSource(time.Now().Unix())) - quickcfg = &quick.Config{MaxCount: 5000, Rand: quickrand} -) - -func TestHexID(t *testing.T) { - ref := NodeID{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 106, 217, 182, 31, 165, 174, 1, 67, 7, 235, 220, 150, 66, 83, 173, 205, 159, 44, 10, 57, 42, 161, 26, 188} - id1 := MustHexID("0x000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc") - id2 := MustHexID("000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc") - - if id1 != ref { - t.Errorf("wrong id1\ngot %v\nwant %v", id1[:], ref[:]) - } - if id2 != ref { - t.Errorf("wrong id2\ngot %v\nwant %v", id2[:], ref[:]) - } -} - -func TestNodeID_recover(t *testing.T) { - prv := newkey() - hash := make([]byte, 32) - sig, err := crypto.Sign(hash, prv) - if err != nil { - t.Fatalf("signing error: %v", err) - } - - pub := PubkeyID(&prv.PublicKey) - recpub, err := recoverNodeID(hash, sig) - if err != nil { - t.Fatalf("recovery error: %v", err) - } - if pub != recpub { - t.Errorf("recovered wrong pubkey:\ngot: %v\nwant: %v", recpub, pub) - } -} - -func TestNodeID_distcmp(t *testing.T) { - distcmpBig := func(target, a, b NodeID) int { - tbig := new(big.Int).SetBytes(target[:]) - abig := new(big.Int).SetBytes(a[:]) - bbig := new(big.Int).SetBytes(b[:]) - return new(big.Int).Xor(tbig, abig).Cmp(new(big.Int).Xor(tbig, bbig)) - } - if err := quick.CheckEqual(distcmp, distcmpBig, quickcfg); err != nil { - t.Error(err) - } -} - -// the random tests is likely to miss the case where they're equal. -func TestNodeID_distcmpEqual(t *testing.T) { - base := NodeID{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} - x := NodeID{15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0} - if distcmp(base, x, x) != 0 { - t.Errorf("distcmp(base, x, x) != 0") - } -} - -func TestNodeID_logdist(t *testing.T) { - logdistBig := func(a, b NodeID) int { - abig, bbig := new(big.Int).SetBytes(a[:]), new(big.Int).SetBytes(b[:]) - return new(big.Int).Xor(abig, bbig).BitLen() - } - if err := quick.CheckEqual(logdist, logdistBig, quickcfg); err != nil { - t.Error(err) - } -} - -// the random tests is likely to miss the case where they're equal. -func TestNodeID_logdistEqual(t *testing.T) { - x := NodeID{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} - if logdist(x, x) != 0 { - t.Errorf("logdist(x, x) != 0") - } -} - -func TestNodeID_randomID(t *testing.T) { - // we don't use quick.Check here because its output isn't - // very helpful when the test fails. - for i := 0; i < quickcfg.MaxCount; i++ { - a := gen(NodeID{}, quickrand).(NodeID) - dist := quickrand.Intn(len(NodeID{}) * 8) - result := randomID(a, dist) - actualdist := logdist(result, a) - - if dist != actualdist { - t.Log("a: ", a) - t.Log("result:", result) - t.Fatalf("#%d: distance of result is %d, want %d", i, actualdist, dist) - } - } -} - -func (NodeID) Generate(rand *rand.Rand, size int) reflect.Value { - var id NodeID - m := rand.Intn(len(id)) - for i := len(id) - 1; i > m; i-- { - id[i] = byte(rand.Uint32()) - } - return reflect.ValueOf(id) -} - func TestTable_bumpOrAddPingReplace(t *testing.T) { pingC := make(pingC) tab := newTable(pingC, NodeID{}, &net.UDPAddr{}) @@ -123,7 +21,7 @@ func TestTable_bumpOrAddPingReplace(t *testing.T) { // this bumpOrAdd should not replace the last node // because the node replies to ping. - new := tab.bumpOrAdd(randomID(tab.self.ID, 200), nil) + new := tab.bumpOrAdd(randomID(tab.self.ID, 200), &net.UDPAddr{}) pinged := <-pingC if pinged != last.ID { @@ -149,7 +47,7 @@ func TestTable_bumpOrAddPingTimeout(t *testing.T) { // this bumpOrAdd should replace the last node // because the node does not reply to ping. - new := tab.bumpOrAdd(randomID(tab.self.ID, 200), nil) + new := tab.bumpOrAdd(randomID(tab.self.ID, 200), &net.UDPAddr{}) // wait for async bucket update. damn. this needs to go away. time.Sleep(2 * time.Millisecond) @@ -329,19 +227,17 @@ type findnodeOracle struct { } func (t findnodeOracle) findnode(n *Node, target NodeID) ([]*Node, error) { - t.t.Logf("findnode query at dist %d", n.Addr.Port) + t.t.Logf("findnode query at dist %d", n.DiscPort) // current log distance is encoded in port number var result []*Node - switch port := n.Addr.Port; port { + switch n.DiscPort { case 0: panic("query to node at distance 0") - case 1: - result = append(result, &Node{ID: t.target, Addr: &net.UDPAddr{Port: 0}}) default: // TODO: add more randomness to distances - port-- + next := n.DiscPort - 1 for i := 0; i < bucketSize; i++ { - result = append(result, &Node{ID: randomID(t.target, port), Addr: &net.UDPAddr{Port: port}}) + result = append(result, &Node{ID: randomID(t.target, next), DiscPort: next}) } } return result, nil diff --git a/p2p/discover/udp.go b/p2p/discover/udp.go index 449139c1d8..67e349aa41 100644 --- a/p2p/discover/udp.go +++ b/p2p/discover/udp.go @@ -69,6 +69,12 @@ type ( } ) +type rpcNode struct { + IP string + Port uint16 + ID NodeID +} + // udp implements the RPC protocol. type udp struct { conn *net.UDPConn @@ -121,7 +127,7 @@ func ListenUDP(priv *ecdsa.PrivateKey, laddr string) (*Table, error) { return nil, err } net.Table = newTable(net, PubkeyID(&priv.PublicKey), realaddr) - log.Debugf("Listening on %v, my ID %x\n", realaddr, net.self.ID[:]) + log.Debugf("Listening, %v\n", net.self) return net.Table, nil } @@ -159,8 +165,8 @@ func (t *udp) ping(e *Node) error { // TODO: maybe check for ReplyTo field in callback to measure RTT errc := t.pending(e.ID, pongPacket, func(interface{}) bool { return true }) t.send(e, pingPacket, ping{ - IP: t.self.Addr.String(), - Port: uint16(t.self.Addr.Port), + IP: t.self.IP.String(), + Port: uint16(t.self.TCPPort), Expiration: uint64(time.Now().Add(expiration).Unix()), }) return <-errc @@ -176,7 +182,7 @@ func (t *udp) findnode(to *Node, target NodeID) ([]*Node, error) { for i := 0; i < len(reply.Nodes); i++ { nreceived++ n := reply.Nodes[i] - if validAddr(n.Addr) && n.ID != t.self.ID { + if n.ID != t.self.ID && n.isValid() { nodes = append(nodes, n) } } @@ -191,10 +197,6 @@ func (t *udp) findnode(to *Node, target NodeID) ([]*Node, error) { return nodes, err } -func validAddr(a *net.UDPAddr) bool { - return !a.IP.IsMulticast() && !a.IP.IsUnspecified() && a.Port != 0 -} - // pending adds a reply callback to the pending reply queue. // see the documentation of type pending for a detailed explanation. func (t *udp) pending(id NodeID, ptype byte, callback func(interface{}) bool) <-chan error { @@ -302,8 +304,9 @@ func (t *udp) send(to *Node, ptype byte, req interface{}) error { // the future. copy(packet, crypto.Sha3(packet[macSize:])) - log.DebugDetailf(">>> %v %T %v\n", to.Addr, req, req) - if _, err = t.conn.WriteToUDP(packet, to.Addr); err != nil { + toaddr := &net.UDPAddr{IP: to.IP, Port: to.DiscPort} + log.DebugDetailf(">>> %v %T %v\n", toaddr, req, req) + if _, err = t.conn.WriteToUDP(packet, toaddr); err != nil { log.DebugDetailln("UDP send failed:", err) } return err @@ -365,11 +368,14 @@ func (req *ping) handle(t *udp, from *net.UDPAddr, fromID NodeID, mac []byte) er return errExpired } t.mutex.Lock() - // Note: we're ignoring the provided IP/Port right now. - e := t.bumpOrAdd(fromID, from) + // Note: we're ignoring the provided IP address right now + n := t.bumpOrAdd(fromID, from) + if req.Port != 0 { + n.TCPPort = int(req.Port) + } t.mutex.Unlock() - t.send(e, pongPacket, pong{ + t.send(n, pongPacket, pong{ ReplyTok: mac, Expiration: uint64(time.Now().Add(expiration).Unix()), }) diff --git a/p2p/discover/udp_test.go b/p2p/discover/udp_test.go index 8ed6ec9c0a..94680d6fce 100644 --- a/p2p/discover/udp_test.go +++ b/p2p/discover/udp_test.go @@ -4,6 +4,7 @@ import ( logpkg "log" "net" "os" + "reflect" "testing" "time" @@ -11,7 +12,7 @@ import ( ) func init() { - logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, logpkg.LstdFlags, logger.DebugLevel)) + logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, logpkg.LstdFlags, logger.ErrorLevel)) } func TestUDP_ping(t *testing.T) { @@ -52,7 +53,7 @@ func TestUDP_findnode(t *testing.T) { defer n1.Close() defer n2.Close() - entry := &Node{ID: NodeID{1}, Addr: &net.UDPAddr{IP: net.IP{1, 2, 3, 4}, Port: 15}} + entry := MustParseNode("enode://9d8a19597e312ef32d76e6b4903bb43d7bcd892d17b769d30b404bd3a4c2dca6c86184b17d0fdeeafe3b01e0e912d990ddc853db3f325d5419f31446543c30be@127.0.0.1:54194") n2.add([]*Node{entry}) target := randomID(n1.self.ID, 100) @@ -60,7 +61,7 @@ func TestUDP_findnode(t *testing.T) { if len(result) != 1 { t.Fatalf("wrong number of results: got %d, want 1", len(result)) } - if result[0].ID != entry.ID { + if !reflect.DeepEqual(result[0], entry) { t.Errorf("wrong result: got %v, want %v", result[0], entry) } } @@ -103,8 +104,10 @@ func TestUDP_findnodeMultiReply(t *testing.T) { nodes := make([]*Node, bucketSize) for i := range nodes { nodes[i] = &Node{ - Addr: &net.UDPAddr{IP: net.IP{1, 2, 3, 4}, Port: i + 1}, - ID: randomID(n2.self.ID, i+1), + IP: net.IP{1, 2, 3, 4}, + DiscPort: i + 1, + TCPPort: i + 1, + ID: randomID(n2.self.ID, i+1), } } diff --git a/p2p/server.go b/p2p/server.go index 9b80305414..87be97a2f3 100644 --- a/p2p/server.go +++ b/p2p/server.go @@ -136,7 +136,7 @@ func (srv *Server) PeerCount() int { // SuggestPeer creates a connection to the given Node if it // is not already connected. func (srv *Server) SuggestPeer(ip net.IP, port int, id discover.NodeID) { - srv.peerConnect <- &discover.Node{ID: id, Addr: &net.UDPAddr{IP: ip, Port: port}} + srv.peerConnect <- &discover.Node{ID: id, IP: ip, TCPPort: port} } // Broadcast sends an RLP-encoded message to all connected peers. @@ -364,8 +364,9 @@ func (srv *Server) dialLoop() { } func (srv *Server) dialNode(dest *discover.Node) { - srvlog.Debugf("Dialing %v\n", dest.Addr) - conn, err := srv.Dialer.Dial("tcp", dest.Addr.String()) + addr := &net.TCPAddr{IP: dest.IP, Port: dest.TCPPort} + srvlog.Debugf("Dialing %v\n", dest) + conn, err := srv.Dialer.Dial("tcp", addr.String()) if err != nil { srvlog.DebugDetailf("dial error: %v", err) return diff --git a/p2p/server_test.go b/p2p/server_test.go index a05e01014f..89300cf1cc 100644 --- a/p2p/server_test.go +++ b/p2p/server_test.go @@ -91,8 +91,7 @@ func TestServerDial(t *testing.T) { // tell the server to connect tcpAddr := listener.Addr().(*net.TCPAddr) - connAddr := &discover.Node{Addr: &net.UDPAddr{IP: tcpAddr.IP, Port: tcpAddr.Port}} - srv.peerConnect <- connAddr + srv.peerConnect <- &discover.Node{IP: tcpAddr.IP, TCPPort: tcpAddr.Port} select { case conn := <-accepted: From e34d1341022a51d8a86c4836c91e4e0ded888d27 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Sat, 7 Feb 2015 00:13:22 +0100 Subject: [PATCH 34/54] p2p: fixes for actual connections The unit test hooks were turned on 'in production'. --- p2p/message.go | 4 ++-- p2p/peer.go | 37 +++++++++++++++++++++---------------- p2p/peer_error.go | 2 +- p2p/peer_test.go | 19 ++++++++++--------- p2p/server.go | 4 +++- p2p/server_test.go | 1 + 6 files changed, 38 insertions(+), 29 deletions(-) diff --git a/p2p/message.go b/p2p/message.go index 6521d09c24..dfc33f3497 100644 --- a/p2p/message.go +++ b/p2p/message.go @@ -174,10 +174,10 @@ func (rw *frameRW) ReadMsg() (msg Msg, err error) { // read magic and payload size start := make([]byte, 8) if _, err = io.ReadFull(rw.bufconn, start); err != nil { - return msg, newPeerError(errRead, "%v", err) + return msg, err } if !bytes.HasPrefix(start, magicToken) { - return msg, newPeerError(errMagicTokenMismatch, "got %x, want %x", start[:4], magicToken) + return msg, fmt.Errorf("bad magic token %x", start[:4], magicToken) } size := binary.BigEndian.Uint32(start[4:]) diff --git a/p2p/peer.go b/p2p/peer.go index 1fa8264a35..b61cf96daf 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -1,6 +1,7 @@ package p2p import ( + "errors" "fmt" "io" "io/ioutil" @@ -71,7 +72,8 @@ type Peer struct { runlock sync.RWMutex // protects running running map[string]*proto - protocolHandshakeEnabled bool + // disables protocol handshake, for testing + noHandshake bool protoWG sync.WaitGroup protoErr chan error @@ -134,11 +136,11 @@ func (p *Peer) Disconnect(reason DiscReason) { // String implements fmt.Stringer. func (p *Peer) String() string { - return fmt.Sprintf("Peer %.8x %v", p.remoteID, p.RemoteAddr()) + return fmt.Sprintf("Peer %.8x %v", p.remoteID[:], p.RemoteAddr()) } func newPeer(conn net.Conn, protocols []Protocol, ourName string, ourID, remoteID *discover.NodeID) *Peer { - logtag := fmt.Sprintf("Peer %.8x %v", remoteID, conn.RemoteAddr()) + logtag := fmt.Sprintf("Peer %.8x %v", remoteID[:], conn.RemoteAddr()) return &Peer{ Logger: logger.NewLogger(logtag), rw: newFrameRW(conn, msgWriteTimeout), @@ -164,33 +166,35 @@ func (p *Peer) run() DiscReason { var readErr = make(chan error, 1) defer p.closeProtocols() defer close(p.closed) - defer p.rw.Close() - // start the read loop go func() { readErr <- p.readLoop() }() - if p.protocolHandshakeEnabled { + if !p.noHandshake { if err := writeProtocolHandshake(p.rw, p.ourName, *p.ourID, p.protocols); err != nil { p.DebugDetailf("Protocol handshake error: %v\n", err) + p.rw.Close() return DiscProtocolError } } - // wait for an error or disconnect + // Wait for an error or disconnect. var reason DiscReason select { case err := <-readErr: // We rely on protocols to abort if there is a write error. It // might be more robust to handle them here as well. p.DebugDetailf("Read error: %v\n", err) - reason = DiscNetworkError + p.rw.Close() + return DiscNetworkError + case err := <-p.protoErr: reason = discReasonForError(err) case reason = <-p.disc: } - if reason != DiscNetworkError { - p.politeDisconnect(reason) - } + p.politeDisconnect(reason) + + // Wait for readLoop. It will end because conn is now closed. + <-readErr p.Debugf("Disconnected: %v\n", reason) return reason } @@ -198,9 +202,9 @@ func (p *Peer) run() DiscReason { func (p *Peer) politeDisconnect(reason DiscReason) { done := make(chan struct{}) go func() { - // send reason EncodeMsg(p.rw, discMsg, uint(reason)) - // discard any data that might arrive + // Wait for the other side to close the connection. + // Discard any data that they send until then. io.Copy(ioutil.Discard, p.rw) close(done) }() @@ -208,10 +212,11 @@ func (p *Peer) politeDisconnect(reason DiscReason) { case <-done: case <-time.After(disconnectGracePeriod): } + p.rw.Close() } func (p *Peer) readLoop() error { - if p.protocolHandshakeEnabled { + if !p.noHandshake { if err := readProtocolHandshake(p, p.rw); err != nil { return err } @@ -264,7 +269,7 @@ func readProtocolHandshake(p *Peer, rw MsgReadWriter) error { return newPeerError(errProtocolBreach, "expected handshake, got %x", msg.Code) } if msg.Size > baseProtocolMaxMsgSize { - return newPeerError(errMisc, "message too big") + return newPeerError(errInvalidMsg, "message too big") } var hs handshake if err := msg.Decode(&hs); err != nil { @@ -326,7 +331,7 @@ func (p *Peer) startProto(offset uint64, impl Protocol) *proto { err := impl.Run(p, rw) if err == nil { p.DebugDetailf("Protocol %s/%d returned\n", impl.Name, impl.Version) - err = newPeerError(errMisc, "protocol returned") + err = errors.New("protocol returned") } else { p.DebugDetailf("Protocol %s/%d error: %v\n", impl.Name, impl.Version, err) } diff --git a/p2p/peer_error.go b/p2p/peer_error.go index 9133768f90..0ff4f4b43e 100644 --- a/p2p/peer_error.go +++ b/p2p/peer_error.go @@ -123,7 +123,7 @@ func discReasonForError(err error) DiscReason { return DiscProtocolError case errPingTimeout: return DiscReadTimeout - case errRead, errWrite, errMisc: + case errRead, errWrite: return DiscNetworkError default: return DiscSubprotocolError diff --git a/p2p/peer_test.go b/p2p/peer_test.go index 76d856d3e0..68c9910a26 100644 --- a/p2p/peer_test.go +++ b/p2p/peer_test.go @@ -30,10 +30,10 @@ var discard = Protocol{ }, } -func testPeer(handshake bool, protos []Protocol) (*frameRW, *Peer, <-chan DiscReason) { +func testPeer(noHandshake bool, protos []Protocol) (*frameRW, *Peer, <-chan DiscReason) { conn1, conn2 := net.Pipe() peer := newPeer(conn1, protos, "name", &discover.NodeID{}, &discover.NodeID{}) - peer.protocolHandshakeEnabled = handshake + peer.noHandshake = noHandshake errc := make(chan DiscReason, 1) go func() { errc <- peer.run() }() return newFrameRW(conn2, msgWriteTimeout), peer, errc @@ -61,7 +61,7 @@ func TestPeerProtoReadMsg(t *testing.T) { }, } - rw, peer, errc := testPeer(false, []Protocol{proto}) + rw, peer, errc := testPeer(true, []Protocol{proto}) defer rw.Close() peer.startSubprotocols([]Cap{proto.cap()}) @@ -100,7 +100,7 @@ func TestPeerProtoReadLargeMsg(t *testing.T) { }, } - rw, peer, errc := testPeer(false, []Protocol{proto}) + rw, peer, errc := testPeer(true, []Protocol{proto}) defer rw.Close() peer.startSubprotocols([]Cap{proto.cap()}) @@ -130,7 +130,7 @@ func TestPeerProtoEncodeMsg(t *testing.T) { return nil }, } - rw, peer, _ := testPeer(false, []Protocol{proto}) + rw, peer, _ := testPeer(true, []Protocol{proto}) defer rw.Close() peer.startSubprotocols([]Cap{proto.cap()}) @@ -142,7 +142,7 @@ func TestPeerProtoEncodeMsg(t *testing.T) { func TestPeerWriteForBroadcast(t *testing.T) { defer testlog(t).detach() - rw, peer, peerErr := testPeer(false, []Protocol{discard}) + rw, peer, peerErr := testPeer(true, []Protocol{discard}) defer rw.Close() peer.startSubprotocols([]Cap{discard.cap()}) @@ -179,7 +179,7 @@ func TestPeerWriteForBroadcast(t *testing.T) { func TestPeerPing(t *testing.T) { defer testlog(t).detach() - rw, _, _ := testPeer(false, nil) + rw, _, _ := testPeer(true, nil) defer rw.Close() if err := EncodeMsg(rw, pingMsg); err != nil { t.Fatal(err) @@ -192,7 +192,7 @@ func TestPeerPing(t *testing.T) { func TestPeerDisconnect(t *testing.T) { defer testlog(t).detach() - rw, _, disc := testPeer(false, nil) + rw, _, disc := testPeer(true, nil) defer rw.Close() if err := EncodeMsg(rw, discMsg, DiscQuitting); err != nil { t.Fatal(err) @@ -233,7 +233,7 @@ func TestPeerHandshake(t *testing.T) { {Name: "c", Version: 3, Length: 1, Run: run}, {Name: "d", Version: 4, Length: 1, Run: run}, } - rw, p, disc := testPeer(true, protocols) + rw, p, disc := testPeer(false, protocols) p.remoteID = remote.ourID defer rw.Close() @@ -269,6 +269,7 @@ func TestPeerHandshake(t *testing.T) { } close(stop) + expectMsg(rw, discMsg, nil) t.Logf("disc reason: %v", <-disc) } diff --git a/p2p/server.go b/p2p/server.go index 87be97a2f3..c6d7fc2e82 100644 --- a/p2p/server.go +++ b/p2p/server.go @@ -408,7 +408,9 @@ func (srv *Server) startPeer(conn net.Conn, dest *discover.Node) { return } - srv.newPeerHook(p) + if srv.newPeerHook != nil { + srv.newPeerHook(p) + } p.run() srv.removePeer(p) } diff --git a/p2p/server_test.go b/p2p/server_test.go index 89300cf1cc..d1e1640fb1 100644 --- a/p2p/server_test.go +++ b/p2p/server_test.go @@ -118,6 +118,7 @@ func TestServerBroadcast(t *testing.T) { srv := startTestServer(t, func(p *Peer) { p.protocols = []Protocol{discard} p.startSubprotocols([]Cap{discard.cap()}) + p.noHandshake = true connected.Done() }) defer srv.Stop() From 2cf4fed11b01bb99e08b838f7df2b9396f42f758 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Sat, 7 Feb 2015 00:15:04 +0100 Subject: [PATCH 35/54] cmd/mist, eth, javascript, p2p: use Node URLs for peer suggestions --- cmd/mist/assets/qml/main.qml | 44 +++++++------------------------- cmd/mist/ui_lib.go | 12 +++------ eth/backend.go | 10 +++----- javascript/javascript_runtime.go | 11 ++------ p2p/server.go | 4 +-- p2p/server_test.go | 2 +- 6 files changed, 21 insertions(+), 62 deletions(-) diff --git a/cmd/mist/assets/qml/main.qml b/cmd/mist/assets/qml/main.qml index b1d3f2d192..45d56e795a 100644 --- a/cmd/mist/assets/qml/main.qml +++ b/cmd/mist/assets/qml/main.qml @@ -205,7 +205,7 @@ ApplicationWindow { Menu { title: "Network" MenuItem { - text: "Add Peer" + text: "Connect to Node" shortcut: "Ctrl+p" onTriggered: { addPeerWin.visible = true @@ -838,60 +838,34 @@ ApplicationWindow { Window { id: addPeerWin visible: false - minimumWidth: 300 - maximumWidth: 300 + minimumWidth: 400 + maximumWidth: 400 maximumHeight: 50 minimumHeight: 50 - title: "Connect to peer" + title: "Connect to Node" - - ComboBox { + TextField { id: addrField + placeholderText: "enode://::" anchors.verticalCenter: parent.verticalCenter anchors.left: parent.left anchors.right: addPeerButton.left anchors.leftMargin: 10 anchors.rightMargin: 10 onAccepted: { - eth.connectToPeer(addrField.currentText) + eth.connectToPeer(addrField.text) addPeerWin.visible = false } - - editable: true - model: ListModel { id: pastPeers } - - Component.onCompleted: { - pastPeers.insert(0, {text: "poc-8.ethdev.com:30303"}) - /* - var ips = eth.pastPeers() - for(var i = 0; i < ips.length; i++) { - pastPeers.append({text: ips.get(i)}) - } - - pastPeers.insert(0, {text: "poc-7.ethdev.com:30303"}) - */ - } } - ComboBox { - id: nodeidField - anchors.verticalCenter: parent.verticalCenter - anchors.left: parent.left - anchors.right: addPeerButton.left - anchors.leftMargin: 10 - anchors.rightMargin: 10 - - editable: true - } - Button { id: addPeerButton anchors.right: parent.right anchors.verticalCenter: parent.verticalCenter anchors.rightMargin: 10 - text: "Add" + text: "Connect" onClicked: { - eth.connectToPeer(addrField.currentText, nodeidField.currentText) + eth.connectToPeer(addrField.text) addPeerWin.visible = false } } diff --git a/cmd/mist/ui_lib.go b/cmd/mist/ui_lib.go index 2e557dba90..dbebd8a6fd 100644 --- a/cmd/mist/ui_lib.go +++ b/cmd/mist/ui_lib.go @@ -31,7 +31,6 @@ import ( "github.com/ethereum/go-ethereum/event/filter" "github.com/ethereum/go-ethereum/javascript" "github.com/ethereum/go-ethereum/miner" - "github.com/ethereum/go-ethereum/p2p/discover" "github.com/ethereum/go-ethereum/xeth" "github.com/obscuren/qml" ) @@ -143,14 +142,9 @@ func (ui *UiLib) Connect(button qml.Object) { } } -func (ui *UiLib) ConnectToPeer(addr string, hexid string) { - id, err := discover.HexID(hexid) - if err != nil { - guilogger.Errorf("bad node ID: %v", err) - return - } - if err := ui.eth.SuggestPeer(addr, id); err != nil { - guilogger.Infoln(err) +func (ui *UiLib) ConnectToPeer(nodeURL string) { + if err := ui.eth.SuggestPeer(nodeURL); err != nil { + guilogger.Infoln("SuggestPeer error: " + err.Error()) } } diff --git a/eth/backend.go b/eth/backend.go index 08052c15d9..6cf2069d7d 100644 --- a/eth/backend.go +++ b/eth/backend.go @@ -2,7 +2,6 @@ package eth import ( "fmt" - "net" "sync" "github.com/ethereum/go-ethereum/core" @@ -241,13 +240,12 @@ func (s *Ethereum) Start(seedNode string) error { return nil } -func (self *Ethereum) SuggestPeer(addr string, id discover.NodeID) error { - netaddr, err := net.ResolveTCPAddr("tcp", addr) +func (self *Ethereum) SuggestPeer(nodeURL string) error { + n, err := discover.ParseNode(nodeURL) if err != nil { - logger.Errorf("couldn't resolve %s:", addr, err) - return err + return fmt.Errorf("invalid node URL: %v", err) } - self.net.SuggestPeer(netaddr.IP, netaddr.Port, id) + self.net.SuggestPeer(n) return nil } diff --git a/javascript/javascript_runtime.go b/javascript/javascript_runtime.go index a09aff027a..0aa0f73e2c 100644 --- a/javascript/javascript_runtime.go +++ b/javascript/javascript_runtime.go @@ -14,7 +14,6 @@ import ( "github.com/ethereum/go-ethereum/ethutil" "github.com/ethereum/go-ethereum/event" "github.com/ethereum/go-ethereum/logger" - "github.com/ethereum/go-ethereum/p2p/discover" "github.com/ethereum/go-ethereum/state" "github.com/ethereum/go-ethereum/xeth" "github.com/obscuren/otto" @@ -198,19 +197,13 @@ func (self *JSRE) watch(call otto.FunctionCall) otto.Value { } func (self *JSRE) addPeer(call otto.FunctionCall) otto.Value { - host, err := call.Argument(0).ToString() + nodeURL, err := call.Argument(0).ToString() if err != nil { return otto.FalseValue() } - idstr, err := call.Argument(0).ToString() - if err != nil { - return otto.FalseValue() - } - id, err := discover.HexID(idstr) - if err != nil { + if err := self.ethereum.SuggestPeer(nodeURL); err != nil { return otto.FalseValue() } - self.ethereum.SuggestPeer(host, id) return otto.TrueValue() } diff --git a/p2p/server.go b/p2p/server.go index c6d7fc2e82..bb31014857 100644 --- a/p2p/server.go +++ b/p2p/server.go @@ -135,8 +135,8 @@ func (srv *Server) PeerCount() int { // SuggestPeer creates a connection to the given Node if it // is not already connected. -func (srv *Server) SuggestPeer(ip net.IP, port int, id discover.NodeID) { - srv.peerConnect <- &discover.Node{ID: id, IP: ip, TCPPort: port} +func (srv *Server) SuggestPeer(n *discover.Node) { + srv.peerConnect <- n } // Broadcast sends an RLP-encoded message to all connected peers. diff --git a/p2p/server_test.go b/p2p/server_test.go index d1e1640fb1..aa2b3d2431 100644 --- a/p2p/server_test.go +++ b/p2p/server_test.go @@ -91,7 +91,7 @@ func TestServerDial(t *testing.T) { // tell the server to connect tcpAddr := listener.Addr().(*net.TCPAddr) - srv.peerConnect <- &discover.Node{IP: tcpAddr.IP, TCPPort: tcpAddr.Port} + srv.SuggestPeer(&discover.Node{IP: tcpAddr.IP, TCPPort: tcpAddr.Port}) select { case conn := <-accepted: From 028775a0863946c1e9ad51fe7b22faa5c59b2605 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Sat, 7 Feb 2015 00:38:36 +0100 Subject: [PATCH 36/54] cmd/ethereum, cmd/mist: add flag for discovery bootstrap nodes --- cmd/ethereum/flags.go | 4 ++-- cmd/ethereum/main.go | 3 ++- cmd/mist/flags.go | 4 ++-- cmd/mist/main.go | 5 +++-- cmd/mist/ui_lib.go | 2 +- cmd/utils/cmd.go | 4 ++-- eth/backend.go | 37 ++++++++++++++++++++++++++++--------- p2p/discover/table.go | 4 ++-- p2p/server.go | 2 +- 9 files changed, 43 insertions(+), 22 deletions(-) diff --git a/cmd/ethereum/flags.go b/cmd/ethereum/flags.go index af57c6a674..87fdd28385 100644 --- a/cmd/ethereum/flags.go +++ b/cmd/ethereum/flags.go @@ -49,7 +49,7 @@ var ( AddPeer string MaxPeer int GenAddr bool - SeedNode string + BootNodes string SecretFile string ExportDir string NonInteractive bool @@ -101,7 +101,7 @@ func Init() { flag.BoolVar(&StartRpc, "rpc", false, "start rpc server") flag.BoolVar(&StartWebSockets, "ws", false, "start websocket server") flag.BoolVar(&NonInteractive, "y", false, "non-interactive mode (say yes to confirmations)") - flag.StringVar(&SeedNode, "seednode", "poc-8.ethdev.com:30303", "ip:port of seed node to connect to. Set to blank for skip") + flag.StringVar(&BootNodes, "bootnodes", "", "space-separated node URLs for discovery bootstrap") flag.BoolVar(&SHH, "shh", true, "whisper protocol (on)") flag.BoolVar(&Dial, "dial", true, "dial out connections (on)") flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key") diff --git a/cmd/ethereum/main.go b/cmd/ethereum/main.go index faac0bc5dd..14e67fe4a8 100644 --- a/cmd/ethereum/main.go +++ b/cmd/ethereum/main.go @@ -74,6 +74,7 @@ func main() { KeyRing: KeyRing, Shh: SHH, Dial: Dial, + BootNodes: BootNodes, }) if err != nil { @@ -133,7 +134,7 @@ func main() { utils.StartWebSockets(ethereum, WsPort) } - utils.StartEthereum(ethereum, SeedNode) + utils.StartEthereum(ethereum) if StartJsConsole { InitJsConsole(ethereum) diff --git a/cmd/mist/flags.go b/cmd/mist/flags.go index f042b39b07..3a7d2ac54f 100644 --- a/cmd/mist/flags.go +++ b/cmd/mist/flags.go @@ -51,7 +51,7 @@ var ( AddPeer string MaxPeer int GenAddr bool - SeedNode string + BootNodes string SecretFile string ExportDir string NonInteractive bool @@ -116,7 +116,7 @@ func Init() { flag.BoolVar(&StartRpc, "rpc", true, "start rpc server") flag.BoolVar(&StartWebSockets, "ws", false, "start websocket server") flag.BoolVar(&NonInteractive, "y", false, "non-interactive mode (say yes to confirmations)") - flag.StringVar(&SeedNode, "seednode", "poc-8.ethdev.com:30303", "ip:port of seed node to connect to. Set to blank for skip") + flag.StringVar(&BootNodes, "bootnodes", "", "space-separated node URLs for discovery bootstrap") flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key") flag.StringVar(&NatType, "nat", "", "NAT support (UPNP|PMP) (none)") flag.StringVar(&SecretFile, "import", "", "imports the file given (hex or mnemonic formats)") diff --git a/cmd/mist/main.go b/cmd/mist/main.go index 17ab9467a6..5bae330880 100644 --- a/cmd/mist/main.go +++ b/cmd/mist/main.go @@ -59,8 +59,9 @@ func run() error { LogLevel: LogLevel, MaxPeers: MaxPeer, Port: OutboundPort, - NATType: PMPGateway, + NATType: NatType, PMPGateway: PMPGateway, + BootNodes: BootNodes, KeyRing: KeyRing, Dial: true, }) @@ -82,7 +83,7 @@ func run() error { utils.RegisterInterrupt(func(os.Signal) { gui.Stop() }) - go utils.StartEthereum(ethereum, SeedNode) + go utils.StartEthereum(ethereum) fmt.Println("ETH stack took", time.Since(tstart)) diff --git a/cmd/mist/ui_lib.go b/cmd/mist/ui_lib.go index dbebd8a6fd..ba3ac3b61e 100644 --- a/cmd/mist/ui_lib.go +++ b/cmd/mist/ui_lib.go @@ -136,7 +136,7 @@ func (ui *UiLib) Muted(content string) { func (ui *UiLib) Connect(button qml.Object) { if !ui.connected { - ui.eth.Start(SeedNode) + ui.eth.Start() ui.connected = true button.Set("enabled", false) } diff --git a/cmd/utils/cmd.go b/cmd/utils/cmd.go index 2f48bced5b..ecb847fc38 100644 --- a/cmd/utils/cmd.go +++ b/cmd/utils/cmd.go @@ -121,9 +121,9 @@ func exit(err error) { os.Exit(status) } -func StartEthereum(ethereum *eth.Ethereum, SeedNode string) { +func StartEthereum(ethereum *eth.Ethereum) { clilogger.Infoln("Starting ", ethereum.Name()) - if err := ethereum.Start(SeedNode); err != nil { + if err := ethereum.Start(); err != nil { exit(err) } RegisterInterrupt(func(sig os.Signal) { diff --git a/eth/backend.go b/eth/backend.go index 6cf2069d7d..5ad0f83f44 100644 --- a/eth/backend.go +++ b/eth/backend.go @@ -2,6 +2,7 @@ package eth import ( "fmt" + "strings" "sync" "github.com/ethereum/go-ethereum/core" @@ -17,6 +18,8 @@ import ( "github.com/ethereum/go-ethereum/whisper" ) +var logger = ethlogger.NewLogger("SERV") + type Config struct { Name string KeyStore string @@ -30,13 +33,28 @@ type Config struct { NATType string PMPGateway string + // This should be a space-separated list of + // discovery node URLs. + BootNodes string + Shh bool Dial bool KeyManager *crypto.KeyManager } -var logger = ethlogger.NewLogger("SERV") +func (cfg *Config) parseBootNodes() []*discover.Node { + var ns []*discover.Node + for _, url := range strings.Split(cfg.BootNodes, " ") { + n, err := discover.ParseNode(url) + if err != nil { + logger.Errorf("Bootstrap URL %s: %v\n", url, err) + continue + } + ns = append(ns, n) + } + return ns +} type Ethereum struct { // Channel for shutting down the ethereum @@ -134,13 +152,14 @@ func New(config *Config) (*Ethereum, error) { return nil, fmt.Errorf("could not generate server key: %v", err) } eth.net = &p2p.Server{ - PrivateKey: netprv, - Name: config.Name, - MaxPeers: config.MaxPeers, - Protocols: protocols, - Blacklist: eth.blacklist, - NAT: nat, - NoDial: !config.Dial, + PrivateKey: netprv, + Name: config.Name, + MaxPeers: config.MaxPeers, + Protocols: protocols, + Blacklist: eth.blacklist, + NAT: nat, + NoDial: !config.Dial, + BootstrapNodes: config.parseBootNodes(), } if len(config.Port) > 0 { eth.net.ListenAddr = ":" + config.Port @@ -214,7 +233,7 @@ func (s *Ethereum) Coinbase() []byte { } // Start the ethereum -func (s *Ethereum) Start(seedNode string) error { +func (s *Ethereum) Start() error { err := s.net.Start() if err != nil { return err diff --git a/p2p/discover/table.go b/p2p/discover/table.go index 6025507ebd..1cdd93a78b 100644 --- a/p2p/discover/table.go +++ b/p2p/discover/table.go @@ -65,12 +65,12 @@ func (tab *Table) Close() { // to the network if the table is empty. Bootstrap will also attempt to // fill the table by performing random lookup operations on the // network. -func (tab *Table) Bootstrap(nodes []Node) { +func (tab *Table) Bootstrap(nodes []*Node) { tab.mutex.Lock() // TODO: maybe filter nodes with bad fields (nil, etc.) to avoid strange crashes tab.nursery = make([]*Node, 0, len(nodes)) for _, n := range nodes { - cpy := n + cpy := *n tab.nursery = append(tab.nursery, &cpy) } tab.mutex.Unlock() diff --git a/p2p/server.go b/p2p/server.go index bb31014857..3cab611021 100644 --- a/p2p/server.go +++ b/p2p/server.go @@ -50,7 +50,7 @@ type Server struct { // Bootstrap nodes are used to establish connectivity // with the rest of the network. - BootstrapNodes []discover.Node + BootstrapNodes []*discover.Node // Protocols should contain the protocols supported // by the server. Matching protocols are launched for From 9915d3c3be831fa2c95ac277459945d969bd7b06 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Mon, 9 Feb 2015 11:02:32 +0100 Subject: [PATCH 37/54] p2p/discover: deflake UDP tests --- p2p/discover/table.go | 3 +- p2p/discover/table_test.go | 12 +++ p2p/discover/udp.go | 5 +- p2p/discover/udp_test.go | 162 ++++++++++++++++++++++++------------- 4 files changed, 123 insertions(+), 59 deletions(-) diff --git a/p2p/discover/table.go b/p2p/discover/table.go index 1cdd93a78b..1ff2c90d9e 100644 --- a/p2p/discover/table.go +++ b/p2p/discover/table.go @@ -87,9 +87,10 @@ func (tab *Table) Lookup(target NodeID) []*Node { reply = make(chan []*Node, alpha) pendingQueries = 0 ) - // don't query further if we hit the target. + // don't query further if we hit the target or ourself. // unlikely to happen often in practice. asked[target] = true + asked[tab.self.ID] = true tab.mutex.Lock() // update last lookup stamp (for refresh logic) diff --git a/p2p/discover/table_test.go b/p2p/discover/table_test.go index 9b05ce7f4b..08faea68e9 100644 --- a/p2p/discover/table_test.go +++ b/p2p/discover/table_test.go @@ -14,6 +14,18 @@ import ( "github.com/ethereum/go-ethereum/crypto" ) +func TestTable_bumpOrAddBucketAssign(t *testing.T) { + tab := newTable(nil, NodeID{}, &net.UDPAddr{}) + for i := 1; i < len(tab.buckets); i++ { + tab.bumpOrAdd(randomID(tab.self.ID, i), &net.UDPAddr{}) + } + for i, b := range tab.buckets { + if i > 0 && len(b.entries) != 1 { + t.Errorf("bucket %d has %d entries, want 1", i, len(b.entries)) + } + } +} + func TestTable_bumpOrAddPingReplace(t *testing.T) { pingC := make(pingC) tab := newTable(pingC, NodeID{}, &net.UDPAddr{}) diff --git a/p2p/discover/udp.go b/p2p/discover/udp.go index 67e349aa41..4ad5d9cc42 100644 --- a/p2p/discover/udp.go +++ b/p2p/discover/udp.go @@ -179,10 +179,9 @@ func (t *udp) findnode(to *Node, target NodeID) ([]*Node, error) { nreceived := 0 errc := t.pending(to.ID, neighborsPacket, func(r interface{}) bool { reply := r.(*neighbors) - for i := 0; i < len(reply.Nodes); i++ { + for _, n := range reply.Nodes { nreceived++ - n := reply.Nodes[i] - if n.ID != t.self.ID && n.isValid() { + if n.isValid() { nodes = append(nodes, n) } } diff --git a/p2p/discover/udp_test.go b/p2p/discover/udp_test.go index 94680d6fce..740d0a5d9e 100644 --- a/p2p/discover/udp_test.go +++ b/p2p/discover/udp_test.go @@ -1,10 +1,10 @@ package discover import ( + "fmt" logpkg "log" "net" "os" - "reflect" "testing" "time" @@ -53,16 +53,37 @@ func TestUDP_findnode(t *testing.T) { defer n1.Close() defer n2.Close() - entry := MustParseNode("enode://9d8a19597e312ef32d76e6b4903bb43d7bcd892d17b769d30b404bd3a4c2dca6c86184b17d0fdeeafe3b01e0e912d990ddc853db3f325d5419f31446543c30be@127.0.0.1:54194") - n2.add([]*Node{entry}) - + // put a few nodes into n2. the exact distribution shouldn't + // matter much, altough we need to take care not to overflow + // any bucket. target := randomID(n1.self.ID, 100) - result, _ := n1.net.findnode(n2.self, target) - if len(result) != 1 { - t.Fatalf("wrong number of results: got %d, want 1", len(result)) + nodes := &nodesByDistance{target: target} + for i := 0; i < bucketSize; i++ { + n2.add([]*Node{&Node{ + IP: net.IP{1, 2, 3, byte(i)}, + DiscPort: i + 2, + TCPPort: i + 2, + ID: randomID(n2.self.ID, i+2), + }}) } - if !reflect.DeepEqual(result[0], entry) { - t.Errorf("wrong result: got %v, want %v", result[0], entry) + n2.add(nodes.entries) + n2.bumpOrAdd(n1.self.ID, &net.UDPAddr{IP: n1.self.IP, Port: n1.self.DiscPort}) + expected := n2.closest(target, bucketSize) + + err := runUDP(10, func() error { + result, _ := n1.net.findnode(n2.self, target) + if len(result) != bucketSize { + return fmt.Errorf("wrong number of results: got %d, want %d", len(result), bucketSize) + } + for i := range result { + if result[i].ID != expected.entries[i].ID { + return fmt.Errorf("result mismatch at %d:\n got: %v\n want: %v", i, result[i], expected.entries[i]) + } + } + return nil + }) + if err != nil { + t.Error(err) } } @@ -101,59 +122,90 @@ func TestUDP_findnodeMultiReply(t *testing.T) { defer n1.Close() defer n2.Close() - nodes := make([]*Node, bucketSize) - for i := range nodes { - nodes[i] = &Node{ - IP: net.IP{1, 2, 3, 4}, - DiscPort: i + 1, - TCPPort: i + 1, - ID: randomID(n2.self.ID, i+1), + err := runUDP(10, func() error { + nodes := make([]*Node, bucketSize) + for i := range nodes { + nodes[i] = &Node{ + IP: net.IP{1, 2, 3, 4}, + DiscPort: i + 1, + TCPPort: i + 1, + ID: randomID(n2.self.ID, i+1), + } + } + + // ask N2 for neighbors. it will send an empty reply back. + // the request will wait for up to bucketSize replies. + resultc := make(chan []*Node) + errc := make(chan error) + go func() { + ns, err := n1.net.findnode(n2.self, n1.self.ID) + if err != nil { + errc <- err + } else { + resultc <- ns + } + }() + + // send a few more neighbors packets to N1. + // it should collect those. + for end := 0; end < len(nodes); { + off := end + if end = end + 5; end > len(nodes) { + end = len(nodes) + } + udp2.send(n1.self, neighborsPacket, neighbors{ + Nodes: nodes[off:end], + Expiration: uint64(time.Now().Add(10 * time.Second).Unix()), + }) } - } - // ask N2 for neighbors. it will send an empty reply back. - // the request will wait for up to bucketSize replies. - resultC := make(chan []*Node) - go func() { - ns, err := n1.net.findnode(n2.self, n1.self.ID) - if err != nil { - t.Error("findnode error:", err) + // check that they are all returned. we cannot just check for + // equality because they might not be returned in the order they + // were sent. + var result []*Node + select { + case result = <-resultc: + case err := <-errc: + return err } - resultC <- ns - }() - - // send a few more neighbors packets to N1. - // it should collect those. - for end := 0; end < len(nodes); { - off := end - if end = end + 5; end > len(nodes) { - end = len(nodes) + if hasDuplicates(result) { + return fmt.Errorf("result slice contains duplicates") } - udp2.send(n1.self, neighborsPacket, neighbors{ - Nodes: nodes[off:end], - Expiration: uint64(time.Now().Add(10 * time.Second).Unix()), - }) + if len(result) != len(nodes) { + return fmt.Errorf("wrong number of nodes returned: got %d, want %d", len(result), len(nodes)) + } + matched := make(map[NodeID]bool) + for _, n := range result { + for _, expn := range nodes { + if n.ID == expn.ID { // && bytes.Equal(n.Addr.IP, expn.Addr.IP) && n.Addr.Port == expn.Addr.Port { + matched[n.ID] = true + } + } + } + if len(matched) != len(nodes) { + return fmt.Errorf("wrong number of matching nodes: got %d, want %d", len(matched), len(nodes)) + } + return nil + }) + if err != nil { + t.Error(err) } +} - // check that they are all returned. we cannot just check for - // equality because they might not be returned in the order they - // were sent. - result := <-resultC - if hasDuplicates(result) { - t.Error("result slice contains duplicates") - } - if len(result) != len(nodes) { - t.Errorf("wrong number of nodes returned: got %d, want %d", len(result), len(nodes)) - } - matched := make(map[NodeID]bool) - for _, n := range result { - for _, expn := range nodes { - if n.ID == expn.ID { // && bytes.Equal(n.Addr.IP, expn.Addr.IP) && n.Addr.Port == expn.Addr.Port { - matched[n.ID] = true - } +// runUDP runs a test n times and returns an error if the test failed +// in all n runs. This is necessary because UDP is unreliable even for +// connections on the local machine, causing test failures. +func runUDP(n int, test func() error) error { + errcount := 0 + errors := "" + for i := 0; i < n; i++ { + if err := test(); err != nil { + errors += fmt.Sprintf("\n#%d: %v", i, err) + errcount++ } } - if len(matched) != len(nodes) { - t.Errorf("wrong number of matching nodes: got %d, want %d", len(matched), len(nodes)) + if errcount == n { + return fmt.Errorf("failed on all %d iterations:%s", n, errors) } + return nil } From f1ebad2508b6941df5802d607b30b7a5e7b2c67d Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Mon, 9 Feb 2015 16:17:07 +0100 Subject: [PATCH 38/54] eth: don't warn if no BootNodes are specified --- eth/backend.go | 3 +++ 1 file changed, 3 insertions(+) diff --git a/eth/backend.go b/eth/backend.go index 5ad0f83f44..f5ebc90332 100644 --- a/eth/backend.go +++ b/eth/backend.go @@ -46,6 +46,9 @@ type Config struct { func (cfg *Config) parseBootNodes() []*discover.Node { var ns []*discover.Node for _, url := range strings.Split(cfg.BootNodes, " ") { + if url == "" { + continue + } n, err := discover.ParseNode(url) if err != nil { logger.Errorf("Bootstrap URL %s: %v\n", url, err) From 0c7df37351ab85c577fe815d6d22f4627832b0c3 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Tue, 10 Feb 2015 12:29:50 +0100 Subject: [PATCH 39/54] crypto: add key loading functions --- crypto/crypto.go | 28 ++++++++++++++++++++++++++++ crypto/key.go | 3 ++- 2 files changed, 30 insertions(+), 1 deletion(-) diff --git a/crypto/crypto.go b/crypto/crypto.go index 42e6036b5e..2c8f829770 100644 --- a/crypto/crypto.go +++ b/crypto/crypto.go @@ -8,6 +8,8 @@ import ( "crypto/rand" "crypto/sha256" "fmt" + "io" + "os" "encoding/hex" "encoding/json" @@ -99,6 +101,32 @@ func FromECDSAPub(pub *ecdsa.PublicKey) []byte { return elliptic.Marshal(S256(), pub.X, pub.Y) } +// HexToECDSA parses a secp256k1 private key. +func HexToECDSA(hexkey string) (*ecdsa.PrivateKey, error) { + b, err := hex.DecodeString(hexkey) + if err != nil { + return nil, errors.New("invalid hex string") + } + if len(b) != 32 { + return nil, errors.New("invalid length, need 256 bits") + } + return ToECDSA(b), nil +} + +// LoadECDSA loads a secp256k1 private key from the given file. +func LoadECDSA(file string) (*ecdsa.PrivateKey, error) { + buf := make([]byte, 32) + fd, err := os.Open(file) + if err != nil { + return nil, err + } + defer fd.Close() + if _, err := io.ReadFull(fd, buf); err != nil { + return nil, err + } + return ToECDSA(buf), nil +} + func GenerateKey() (*ecdsa.PrivateKey, error) { return ecdsa.GenerateKey(S256(), rand.Reader) } diff --git a/crypto/key.go b/crypto/key.go index b9ad34f47d..ec4908c30e 100644 --- a/crypto/key.go +++ b/crypto/key.go @@ -25,11 +25,12 @@ package crypto import ( "bytes" - "code.google.com/p/go-uuid/uuid" "crypto/ecdsa" "crypto/elliptic" "encoding/json" "io" + + "code.google.com/p/go-uuid/uuid" ) type Key struct { From a3cd2187194b79cd8b14c4ec4f1abca91a0147e0 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Tue, 10 Feb 2015 12:30:09 +0100 Subject: [PATCH 40/54] cmd/mist, cmd/ethereum: add CLI arguments for node key --- cmd/ethereum/flags.go | 39 ++++++++++++++++++++++++++++++++------- cmd/ethereum/main.go | 1 + cmd/mist/flags.go | 34 ++++++++++++++++++++++++++++------ cmd/mist/main.go | 1 + eth/backend.go | 13 ++++++++++--- 5 files changed, 72 insertions(+), 16 deletions(-) diff --git a/cmd/ethereum/flags.go b/cmd/ethereum/flags.go index 87fdd28385..594acdf7f2 100644 --- a/cmd/ethereum/flags.go +++ b/cmd/ethereum/flags.go @@ -21,6 +21,7 @@ package main import ( + "crypto/ecdsa" "flag" "fmt" "log" @@ -28,6 +29,7 @@ import ( "os/user" "path" + "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/logger" "github.com/ethereum/go-ethereum/vm" ) @@ -50,6 +52,7 @@ var ( MaxPeer int GenAddr bool BootNodes string + NodeKey *ecdsa.PrivateKey SecretFile string ExportDir string NonInteractive bool @@ -83,6 +86,7 @@ func defaultDataDir() string { var defaultConfigFile = path.Join(defaultDataDir(), "conf.ini") func Init() { + // TODO: move common flag processing to cmd/util flag.Usage = func() { fmt.Fprintf(os.Stderr, "%s [options] [filename]:\noptions precedence: default < config file < environment variables < command line\n", os.Args[0]) flag.PrintDefaults() @@ -92,18 +96,12 @@ func Init() { flag.StringVar(&Identifier, "id", "", "Custom client identifier") flag.StringVar(&KeyRing, "keyring", "", "identifier for keyring to use") flag.StringVar(&KeyStore, "keystore", "db", "system to store keyrings: db|file (db)") - flag.StringVar(&OutboundPort, "port", "30303", "listening port") - flag.StringVar(&NatType, "nat", "", "NAT support (UPNP|PMP) (none)") - flag.StringVar(&PMPGateway, "pmp", "", "Gateway IP for PMP") - flag.IntVar(&MaxPeer, "maxpeer", 30, "maximum desired peers") + flag.IntVar(&RpcPort, "rpcport", 8545, "port to start json-rpc server on") flag.IntVar(&WsPort, "wsport", 40404, "port to start websocket rpc server on") flag.BoolVar(&StartRpc, "rpc", false, "start rpc server") flag.BoolVar(&StartWebSockets, "ws", false, "start websocket server") flag.BoolVar(&NonInteractive, "y", false, "non-interactive mode (say yes to confirmations)") - flag.StringVar(&BootNodes, "bootnodes", "", "space-separated node URLs for discovery bootstrap") - flag.BoolVar(&SHH, "shh", true, "whisper protocol (on)") - flag.BoolVar(&Dial, "dial", true, "dial out connections (on)") flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key") flag.StringVar(&SecretFile, "import", "", "imports the file given (hex or mnemonic formats)") flag.StringVar(&ExportDir, "export", "", "exports the session keyring to files in the directory given") @@ -125,8 +123,35 @@ func Init() { flag.BoolVar(&StartJsConsole, "js", false, "launches javascript console") flag.BoolVar(&PrintVersion, "version", false, "prints version number") + // Network stuff + var ( + nodeKeyFile = flag.String("nodekey", "", "network private key file") + nodeKeyHex = flag.String("nodekeyhex", "", "network private key (for testing)") + ) + flag.BoolVar(&Dial, "dial", true, "dial out connections (default on)") + flag.BoolVar(&SHH, "shh", true, "run whisper protocol (default on)") + flag.StringVar(&OutboundPort, "port", "30303", "listening port") + flag.StringVar(&NatType, "nat", "", "NAT support (UPNP|PMP) (none)") + flag.StringVar(&PMPGateway, "pmp", "", "Gateway IP for NAT-PMP") + flag.StringVar(&BootNodes, "bootnodes", "", "space-separated node URLs for discovery bootstrap") + flag.IntVar(&MaxPeer, "maxpeer", 30, "maximum desired peers") + flag.Parse() + var err error + switch { + case *nodeKeyFile != "" && *nodeKeyHex != "": + log.Fatal("Options -nodekey and -nodekeyhex are mutually exclusive") + case *nodeKeyFile != "": + if NodeKey, err = crypto.LoadECDSA(*nodeKeyFile); err != nil { + log.Fatalf("-nodekey: %v", err) + } + case *nodeKeyHex != "": + if NodeKey, err = crypto.HexToECDSA(*nodeKeyHex); err != nil { + log.Fatalf("-nodekeyhex: %v", err) + } + } + if VmType >= int(vm.MaxVmTy) { log.Fatal("Invalid VM type ", VmType) } diff --git a/cmd/ethereum/main.go b/cmd/ethereum/main.go index 14e67fe4a8..3f616c0948 100644 --- a/cmd/ethereum/main.go +++ b/cmd/ethereum/main.go @@ -75,6 +75,7 @@ func main() { Shh: SHH, Dial: Dial, BootNodes: BootNodes, + NodeKey: NodeKey, }) if err != nil { diff --git a/cmd/mist/flags.go b/cmd/mist/flags.go index 3a7d2ac54f..dd72b5043f 100644 --- a/cmd/mist/flags.go +++ b/cmd/mist/flags.go @@ -21,6 +21,7 @@ package main import ( + "crypto/ecdsa" "flag" "fmt" "log" @@ -31,6 +32,7 @@ import ( "runtime" "bitbucket.org/kardianos/osext" + "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/logger" "github.com/ethereum/go-ethereum/vm" ) @@ -44,7 +46,6 @@ var ( StartWebSockets bool RpcPort int WsPort int - UseUPnP bool NatType string OutboundPort string ShowGenesis bool @@ -52,6 +53,7 @@ var ( MaxPeer int GenAddr bool BootNodes string + NodeKey *ecdsa.PrivateKey SecretFile string ExportDir string NonInteractive bool @@ -99,6 +101,7 @@ func defaultDataDir() string { var defaultConfigFile = path.Join(defaultDataDir(), "conf.ini") func Init() { + // TODO: move common flag processing to cmd/utils flag.Usage = func() { fmt.Fprintf(os.Stderr, "%s [options] [filename]:\noptions precedence: default < config file < environment variables < command line\n", os.Args[0]) flag.PrintDefaults() @@ -108,30 +111,49 @@ func Init() { flag.StringVar(&Identifier, "id", "", "Custom client identifier") flag.StringVar(&KeyRing, "keyring", "", "identifier for keyring to use") flag.StringVar(&KeyStore, "keystore", "db", "system to store keyrings: db|file (db)") - flag.StringVar(&OutboundPort, "port", "30303", "listening port") - flag.BoolVar(&UseUPnP, "upnp", true, "enable UPnP support") - flag.IntVar(&MaxPeer, "maxpeer", 30, "maximum desired peers") flag.IntVar(&RpcPort, "rpcport", 8545, "port to start json-rpc server on") flag.IntVar(&WsPort, "wsport", 40404, "port to start websocket rpc server on") flag.BoolVar(&StartRpc, "rpc", true, "start rpc server") flag.BoolVar(&StartWebSockets, "ws", false, "start websocket server") flag.BoolVar(&NonInteractive, "y", false, "non-interactive mode (say yes to confirmations)") - flag.StringVar(&BootNodes, "bootnodes", "", "space-separated node URLs for discovery bootstrap") flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key") flag.StringVar(&NatType, "nat", "", "NAT support (UPNP|PMP) (none)") flag.StringVar(&SecretFile, "import", "", "imports the file given (hex or mnemonic formats)") flag.StringVar(&ExportDir, "export", "", "exports the session keyring to files in the directory given") flag.StringVar(&LogFile, "logfile", "", "log file (defaults to standard output)") flag.StringVar(&Datadir, "datadir", defaultDataDir(), "specifies the datadir to use") - flag.StringVar(&PMPGateway, "pmp", "", "Gateway IP for PMP") flag.StringVar(&ConfigFile, "conf", defaultConfigFile, "config file") flag.StringVar(&DebugFile, "debug", "", "debug file (no debugging if not set)") flag.IntVar(&LogLevel, "loglevel", int(logger.InfoLevel), "loglevel: 0-5: silent,error,warn,info,debug,debug detail)") flag.StringVar(&AssetPath, "asset_path", defaultAssetPath(), "absolute path to GUI assets directory") + // Network stuff + var ( + nodeKeyFile = flag.String("nodekey", "", "network private key file") + nodeKeyHex = flag.String("nodekeyhex", "", "network private key (for testing)") + ) + flag.StringVar(&OutboundPort, "port", "30303", "listening port") + flag.StringVar(&PMPGateway, "pmp", "", "Gateway IP for NAT-PMP") + flag.StringVar(&BootNodes, "bootnodes", "", "space-separated node URLs for discovery bootstrap") + flag.IntVar(&MaxPeer, "maxpeer", 30, "maximum desired peers") + flag.Parse() + var err error + switch { + case *nodeKeyFile != "" && *nodeKeyHex != "": + log.Fatal("Options -nodekey and -nodekeyhex are mutually exclusive") + case *nodeKeyFile != "": + if NodeKey, err = crypto.LoadECDSA(*nodeKeyFile); err != nil { + log.Fatalf("-nodekey: %v", err) + } + case *nodeKeyHex != "": + if NodeKey, err = crypto.HexToECDSA(*nodeKeyHex); err != nil { + log.Fatalf("-nodekeyhex: %v", err) + } + } + if VmType >= int(vm.MaxVmTy) { log.Fatal("Invalid VM type ", VmType) } diff --git a/cmd/mist/main.go b/cmd/mist/main.go index 5bae330880..4d6bac9b7d 100644 --- a/cmd/mist/main.go +++ b/cmd/mist/main.go @@ -62,6 +62,7 @@ func run() error { NATType: NatType, PMPGateway: PMPGateway, BootNodes: BootNodes, + NodeKey: NodeKey, KeyRing: KeyRing, Dial: true, }) diff --git a/eth/backend.go b/eth/backend.go index f5ebc90332..e8555061da 100644 --- a/eth/backend.go +++ b/eth/backend.go @@ -1,6 +1,7 @@ package eth import ( + "crypto/ecdsa" "fmt" "strings" "sync" @@ -37,6 +38,10 @@ type Config struct { // discovery node URLs. BootNodes string + // This key is used to identify the node on the network. + // If nil, an ephemeral key is used. + NodeKey *ecdsa.PrivateKey + Shh bool Dial bool @@ -150,9 +155,11 @@ func New(config *Config) (*Ethereum, error) { if err != nil { return nil, err } - netprv, err := crypto.GenerateKey() - if err != nil { - return nil, fmt.Errorf("could not generate server key: %v", err) + netprv := config.NodeKey + if netprv == nil { + if netprv, err = crypto.GenerateKey(); err != nil { + return nil, fmt.Errorf("could not generate server key: %v", err) + } } eth.net = &p2p.Server{ PrivateKey: netprv, From a21b30c9012572e1bbed62ac43bdb1bdc89dab92 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Tue, 10 Feb 2015 13:30:07 +0100 Subject: [PATCH 41/54] eth: remove unused Ethereum sync fields --- eth/backend.go | 4 ---- 1 file changed, 4 deletions(-) diff --git a/eth/backend.go b/eth/backend.go index e8555061da..f3e4842a77 100644 --- a/eth/backend.go +++ b/eth/backend.go @@ -4,7 +4,6 @@ import ( "crypto/ecdsa" "fmt" "strings" - "sync" "github.com/ethereum/go-ethereum/core" "github.com/ethereum/go-ethereum/crypto" @@ -92,9 +91,6 @@ type Ethereum struct { logger ethlogger.LogSystem - synclock sync.Mutex - syncGroup sync.WaitGroup - Mining bool } From 4242b054628b46ea3470e156992c8e41e01c0739 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Tue, 10 Feb 2015 14:26:54 +0100 Subject: [PATCH 42/54] cmd/bootnode: new command (replaces cmd/peerserver) --- cmd/bootnode/main.go | 86 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 cmd/bootnode/main.go diff --git a/cmd/bootnode/main.go b/cmd/bootnode/main.go new file mode 100644 index 0000000000..fd96a7b48f --- /dev/null +++ b/cmd/bootnode/main.go @@ -0,0 +1,86 @@ +/* + This file is part of go-ethereum + + go-ethereum is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + go-ethereum is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with go-ethereum. If not, see . +*/ + +// Command bootnode runs a bootstrap node for the Discovery Protocol. +package main + +import ( + "crypto/ecdsa" + "encoding/hex" + "flag" + "fmt" + "io/ioutil" + "log" + "os" + + "github.com/ethereum/go-ethereum/crypto" + "github.com/ethereum/go-ethereum/logger" + "github.com/ethereum/go-ethereum/p2p/discover" +) + +func main() { + var ( + listenAddr = flag.String("addr", ":30301", "listen address") + genKey = flag.String("genkey", "", "generate a node key and quit") + nodeKeyFile = flag.String("nodekey", "", "private key filename") + nodeKeyHex = flag.String("nodekeyhex", "", "private key as hex (for testing)") + nodeKey *ecdsa.PrivateKey + err error + ) + flag.Parse() + logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.DebugLevel)) + + if *genKey != "" { + writeKey(*genKey) + os.Exit(0) + } + + switch { + case *nodeKeyFile == "" && *nodeKeyHex == "": + log.Fatal("Use -nodekey or -nodekeyhex to specify a private key") + case *nodeKeyFile != "" && *nodeKeyHex != "": + log.Fatal("Options -nodekey and -nodekeyhex are mutually exclusive") + case *nodeKeyFile != "": + if nodeKey, err = crypto.LoadECDSA(*nodeKeyFile); err != nil { + log.Fatalf("-nodekey: %v", err) + } + case *nodeKeyHex != "": + if nodeKey, err = crypto.HexToECDSA(*nodeKeyHex); err != nil { + log.Fatalf("-nodekeyhex: %v", err) + } + } + + if _, err := discover.ListenUDP(nodeKey, *listenAddr); err != nil { + log.Fatal(err) + } + select {} +} + +func writeKey(target string) { + key, err := crypto.GenerateKey() + if err != nil { + log.Fatal("could not generate key: %v", err) + } + b := crypto.FromECDSA(key) + if target == "-" { + fmt.Println(hex.EncodeToString(b)) + } else { + if err := ioutil.WriteFile(target, b, 0600); err != nil { + log.Fatal("write error: ", err) + } + } +} From 1543833ca0b920d38e98994367f3871867d66781 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Tue, 10 Feb 2015 23:49:45 +0100 Subject: [PATCH 43/54] p2p/nat: new package for port mapping stuff I have verified that UPnP and NAT-PMP work against an older version of the MiniUPnP daemon running on pfSense. This code is kind of hard to test automatically. --- p2p/nat/nat.go | 235 +++++++++++++++++++++++++++++++++++++++++++++ p2p/nat/natpmp.go | 115 ++++++++++++++++++++++ p2p/nat/natupnp.go | 149 ++++++++++++++++++++++++++++ 3 files changed, 499 insertions(+) create mode 100644 p2p/nat/nat.go create mode 100644 p2p/nat/natpmp.go create mode 100644 p2p/nat/natupnp.go diff --git a/p2p/nat/nat.go b/p2p/nat/nat.go new file mode 100644 index 0000000000..12d355ba18 --- /dev/null +++ b/p2p/nat/nat.go @@ -0,0 +1,235 @@ +// Package nat provides access to common port mapping protocols. +package nat + +import ( + "errors" + "fmt" + "net" + "strings" + "sync" + "time" + + "github.com/ethereum/go-ethereum/logger" + "github.com/jackpal/go-nat-pmp" +) + +var log = logger.NewLogger("P2P NAT") + +// An implementation of nat.Interface can map local ports to ports +// accessible from the Internet. +type Interface interface { + // These methods manage a mapping between a port on the local + // machine to a port that can be connected to from the internet. + // + // protocol is "UDP" or "TCP". Some implementations allow setting + // a display name for the mapping. The mapping may be removed by + // the gateway when its lifetime ends. + AddMapping(protocol string, extport, intport int, name string, lifetime time.Duration) error + DeleteMapping(protocol string, extport, intport int) error + + // This method should return the external (Internet-facing) + // address of the gateway device. + ExternalIP() (net.IP, error) + + // Should return name of the method. This is used for logging. + String() string +} + +// Parse parses a NAT interface description. +// The following formats are currently accepted. +// Note that mechanism names are not case-sensitive. +// +// "" or "none" return nil +// "extip:77.12.33.4" will assume the local machine is reachable on the given IP +// "any" uses the first auto-detected mechanism +// "upnp" uses the Universal Plug and Play protocol +// "pmp" uses NAT-PMP with an auto-detected gateway address +// "pmp:192.168.0.1" uses NAT-PMP with the given gateway address +func Parse(spec string) (Interface, error) { + var ( + parts = strings.SplitN(spec, ":", 2) + mech = strings.ToLower(parts[0]) + ip net.IP + ) + if len(parts) > 1 { + ip = net.ParseIP(parts[1]) + if ip == nil { + return nil, errors.New("invalid IP address") + } + } + switch mech { + case "", "none", "off": + return nil, nil + case "any", "auto", "on": + return Any(), nil + case "extip", "ip": + if ip == nil { + return nil, errors.New("missing IP address") + } + return ExtIP(ip), nil + case "upnp": + return UPnP(), nil + case "pmp", "natpmp", "nat-pmp": + return PMP(ip), nil + default: + return nil, fmt.Errorf("unknown mechanism %q", parts[0]) + } +} + +const ( + mapTimeout = 20 * time.Minute + mapUpdateInterval = 15 * time.Minute +) + +// Map adds a port mapping on m and keeps it alive until c is closed. +// This function is typically invoked in its own goroutine. +func Map(m Interface, c chan struct{}, protocol string, extport, intport int, name string) { + refresh := time.NewTimer(mapUpdateInterval) + defer func() { + refresh.Stop() + log.Debugf("Deleting port mapping: %s %d -> %d (%s) using %s\n", protocol, extport, intport, name, m) + m.DeleteMapping(protocol, extport, intport) + }() + log.Debugf("add mapping: %s %d -> %d (%s) using %s\n", protocol, extport, intport, name, m) + if err := m.AddMapping(protocol, intport, extport, name, mapTimeout); err != nil { + log.Errorf("mapping error: %v\n", err) + } + for { + select { + case _, ok := <-c: + if !ok { + return + } + case <-refresh.C: + log.DebugDetailf("refresh mapping: %s %d -> %d (%s) using %s\n", protocol, extport, intport, name, m) + if err := m.AddMapping(protocol, intport, extport, name, mapTimeout); err != nil { + log.Errorf("mapping error: %v\n", err) + } + refresh.Reset(mapUpdateInterval) + } + } +} + +// ExtIP assumes that the local machine is reachable on the given +// external IP address, and that any required ports were mapped manually. +// Mapping operations will not return an error but won't actually do anything. +func ExtIP(ip net.IP) Interface { + if ip == nil { + panic("IP must not be nil") + } + return extIP(ip) +} + +type extIP net.IP + +func (n extIP) ExternalIP() (net.IP, error) { return net.IP(n), nil } +func (n extIP) String() string { return fmt.Sprintf("ExtIP(%v)", net.IP(n)) } + +// These do nothing. +func (extIP) AddMapping(string, int, int, string, time.Duration) error { return nil } +func (extIP) DeleteMapping(string, int, int) error { return nil } + +// Any returns a port mapper that tries to discover any supported +// mechanism on the local network. +func Any() Interface { + // TODO: attempt to discover whether the local machine has an + // Internet-class address. Return ExtIP in this case. + return startautodisc("UPnP or NAT-PMP", func() Interface { + found := make(chan Interface, 2) + go func() { found <- discoverUPnP() }() + go func() { found <- discoverPMP() }() + for i := 0; i < cap(found); i++ { + if c := <-found; c != nil { + return c + } + } + return nil + }) +} + +// UPnP returns a port mapper that uses UPnP. It will attempt to +// discover the address of your router using UDP broadcasts. +func UPnP() Interface { + return startautodisc("UPnP", discoverUPnP) +} + +// PMP returns a port mapper that uses NAT-PMP. The provided gateway +// address should be the IP of your router. If the given gateway +// address is nil, PMP will attempt to auto-discover the router. +func PMP(gateway net.IP) Interface { + if gateway != nil { + return &pmp{gw: gateway, c: natpmp.NewClient(gateway)} + } + return startautodisc("NAT-PMP", discoverPMP) +} + +// autodisc represents a port mapping mechanism that is still being +// auto-discovered. Calls to the Interface methods on this type will +// wait until the discovery is done and then call the method on the +// discovered mechanism. +// +// This type is useful because discovery can take a while but we +// want return an Interface value from UPnP, PMP and Auto immediately. +type autodisc struct { + what string + done <-chan Interface + + mu sync.Mutex + found Interface +} + +func startautodisc(what string, doit func() Interface) Interface { + // TODO: monitor network configuration and rerun doit when it changes. + done := make(chan Interface) + ad := &autodisc{what: what, done: done} + go func() { done <- doit(); close(done) }() + return ad +} + +func (n *autodisc) AddMapping(protocol string, extport, intport int, name string, lifetime time.Duration) error { + if err := n.wait(); err != nil { + return err + } + return n.found.AddMapping(protocol, extport, intport, name, lifetime) +} + +func (n *autodisc) DeleteMapping(protocol string, extport, intport int) error { + if err := n.wait(); err != nil { + return err + } + return n.found.DeleteMapping(protocol, extport, intport) +} + +func (n *autodisc) ExternalIP() (net.IP, error) { + if err := n.wait(); err != nil { + return nil, err + } + return n.found.ExternalIP() +} + +func (n *autodisc) String() string { + n.mu.Lock() + defer n.mu.Unlock() + if n.found == nil { + return n.what + } else { + return n.found.String() + } +} + +func (n *autodisc) wait() error { + n.mu.Lock() + found := n.found + n.mu.Unlock() + if found != nil { + // already discovered + return nil + } + if found = <-n.done; found == nil { + return errors.New("no devices discovered") + } + n.mu.Lock() + n.found = found + n.mu.Unlock() + return nil +} diff --git a/p2p/nat/natpmp.go b/p2p/nat/natpmp.go new file mode 100644 index 0000000000..f249c60732 --- /dev/null +++ b/p2p/nat/natpmp.go @@ -0,0 +1,115 @@ +package nat + +import ( + "fmt" + "net" + "strings" + "time" + + "github.com/jackpal/go-nat-pmp" +) + +// natPMPClient adapts the NAT-PMP protocol implementation so it conforms to +// the common interface. +type pmp struct { + gw net.IP + c *natpmp.Client +} + +func (n *pmp) String() string { + return fmt.Sprintf("NAT-PMP(%v)", n.gw) +} + +func (n *pmp) ExternalIP() (net.IP, error) { + response, err := n.c.GetExternalAddress() + if err != nil { + return nil, err + } + return response.ExternalIPAddress[:], nil +} + +func (n *pmp) AddMapping(protocol string, extport, intport int, name string, lifetime time.Duration) error { + if lifetime <= 0 { + return fmt.Errorf("lifetime must not be <= 0") + } + // Note order of port arguments is switched between our + // AddMapping and the client's AddPortMapping. + _, err := n.c.AddPortMapping(strings.ToLower(protocol), intport, extport, int(lifetime/time.Second)) + return err +} + +func (n *pmp) DeleteMapping(protocol string, extport, intport int) (err error) { + // To destroy a mapping, send an add-port with an internalPort of + // the internal port to destroy, an external port of zero and a + // time of zero. + _, err = n.c.AddPortMapping(strings.ToLower(protocol), intport, 0, 0) + return err +} + +func discoverPMP() Interface { + // run external address lookups on all potential gateways + gws := potentialGateways() + found := make(chan *pmp, len(gws)) + for i := range gws { + gw := gws[i] + go func() { + c := natpmp.NewClient(gw) + if _, err := c.GetExternalAddress(); err != nil { + found <- nil + } else { + found <- &pmp{gw, c} + } + }() + } + // return the one that responds first. + // discovery needs to be quick, so we stop caring about + // any responses after a very short timeout. + timeout := time.NewTimer(1 * time.Second) + defer timeout.Stop() + for _ = range gws { + select { + case c := <-found: + if c != nil { + return c + } + case <-timeout.C: + return nil + } + } + return nil +} + +var ( + // LAN IP ranges + _, lan10, _ = net.ParseCIDR("10.0.0.0/8") + _, lan176, _ = net.ParseCIDR("172.16.0.0/12") + _, lan192, _ = net.ParseCIDR("192.168.0.0/16") +) + +// TODO: improve this. We currently assume that (on most networks) +// the router is X.X.X.1 in a local LAN range. +func potentialGateways() (gws []net.IP) { + ifaces, err := net.Interfaces() + if err != nil { + return nil + } + for _, iface := range ifaces { + ifaddrs, err := iface.Addrs() + if err != nil { + return gws + } + for _, addr := range ifaddrs { + switch x := addr.(type) { + case *net.IPNet: + if lan10.Contains(x.IP) || lan176.Contains(x.IP) || lan192.Contains(x.IP) { + ip := x.IP.Mask(x.Mask).To4() + if ip != nil { + ip[3] = ip[3] | 0x01 + gws = append(gws, ip) + } + } + } + } + } + return gws +} diff --git a/p2p/nat/natupnp.go b/p2p/nat/natupnp.go new file mode 100644 index 0000000000..25cbc0d711 --- /dev/null +++ b/p2p/nat/natupnp.go @@ -0,0 +1,149 @@ +package nat + +import ( + "errors" + "fmt" + "net" + "strings" + "time" + + "github.com/fjl/goupnp" + "github.com/fjl/goupnp/dcps/internetgateway1" + "github.com/fjl/goupnp/dcps/internetgateway2" +) + +type upnp struct { + dev *goupnp.RootDevice + service string + client upnpClient +} + +type upnpClient interface { + GetExternalIPAddress() (string, error) + AddPortMapping(string, uint16, string, uint16, string, bool, string, uint32) error + DeletePortMapping(string, uint16, string) error + GetNATRSIPStatus() (sip bool, nat bool, err error) +} + +func (n *upnp) ExternalIP() (addr net.IP, err error) { + ipString, err := n.client.GetExternalIPAddress() + if err != nil { + return nil, err + } + ip := net.ParseIP(ipString) + if ip == nil { + return nil, errors.New("bad IP in response") + } + return ip, nil +} + +func (n *upnp) AddMapping(protocol string, extport, intport int, desc string, lifetime time.Duration) error { + ip, err := n.internalAddress() + if err != nil { + return nil + } + protocol = strings.ToUpper(protocol) + lifetimeS := uint32(lifetime / time.Second) + return n.client.AddPortMapping("", uint16(extport), protocol, uint16(intport), ip.String(), true, desc, lifetimeS) +} + +func (n *upnp) internalAddress() (net.IP, error) { + devaddr, err := net.ResolveUDPAddr("udp4", n.dev.URLBase.Host) + if err != nil { + return nil, err + } + ifaces, err := net.Interfaces() + if err != nil { + return nil, err + } + for _, iface := range ifaces { + addrs, err := iface.Addrs() + if err != nil { + return nil, err + } + for _, addr := range addrs { + switch x := addr.(type) { + case *net.IPNet: + if x.Contains(devaddr.IP) { + return x.IP, nil + } + } + } + } + return nil, fmt.Errorf("could not find local address in same net as %v", devaddr) +} + +func (n *upnp) DeleteMapping(protocol string, extport, intport int) error { + return n.client.DeletePortMapping("", uint16(extport), strings.ToUpper(protocol)) +} + +func (n *upnp) String() string { + return "UPNP " + n.service +} + +// discoverUPnP searches for Internet Gateway Devices +// and returns the first one it can find on the local network. +func discoverUPnP() Interface { + found := make(chan *upnp, 2) + // IGDv1 + go discover(found, internetgateway1.URN_WANConnectionDevice_1, func(dev *goupnp.RootDevice, sc goupnp.ServiceClient) *upnp { + switch sc.Service.ServiceType { + case internetgateway1.URN_WANIPConnection_1: + return &upnp{dev, "IGDv1-IP1", &internetgateway1.WANIPConnection1{sc}} + case internetgateway1.URN_WANPPPConnection_1: + return &upnp{dev, "IGDv1-PPP1", &internetgateway1.WANPPPConnection1{sc}} + } + return nil + }) + // IGDv2 + go discover(found, internetgateway2.URN_WANConnectionDevice_2, func(dev *goupnp.RootDevice, sc goupnp.ServiceClient) *upnp { + switch sc.Service.ServiceType { + case internetgateway2.URN_WANIPConnection_1: + return &upnp{dev, "IGDv2-IP1", &internetgateway2.WANIPConnection1{sc}} + case internetgateway2.URN_WANIPConnection_2: + return &upnp{dev, "IGDv2-IP2", &internetgateway2.WANIPConnection2{sc}} + case internetgateway2.URN_WANPPPConnection_1: + return &upnp{dev, "IGDv2-PPP1", &internetgateway2.WANPPPConnection1{sc}} + } + return nil + }) + for i := 0; i < cap(found); i++ { + if c := <-found; c != nil { + return c + } + } + return nil +} + +func discover(out chan<- *upnp, target string, matcher func(*goupnp.RootDevice, goupnp.ServiceClient) *upnp) { + devs, err := goupnp.DiscoverDevices(target) + if err != nil { + return + } + found := false + for i := 0; i < len(devs) && !found; i++ { + if devs[i].Root == nil { + continue + } + devs[i].Root.Device.VisitServices(func(service *goupnp.Service) { + if found { + return + } + // check for a matching IGD service + sc := goupnp.ServiceClient{service.NewSOAPClient(), devs[i].Root, service} + upnp := matcher(devs[i].Root, sc) + if upnp == nil { + return + } + // check whether port mapping is enabled + if _, nat, err := upnp.client.GetNATRSIPStatus(); err != nil || !nat { + return + } + out <- upnp + found = true + }) + } + if !found { + out <- nil + } +} From d0a2e655c9599f462bb20bd49bc69b8e1e330a21 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Wed, 11 Feb 2015 17:19:31 +0100 Subject: [PATCH 44/54] cmd/ethereum, cmd/mist, eth, p2p: use package p2p/nat This deletes the old NAT implementation. --- cmd/ethereum/flags.go | 11 +- cmd/ethereum/main.go | 27 ++-- cmd/mist/flags.go | 10 +- cmd/mist/main.go | 25 ++-- eth/backend.go | 14 +- p2p/nat.go | 23 --- p2p/natpmp.go | 55 ------- p2p/natupnp.go | 341 ------------------------------------------ p2p/server.go | 70 ++------- 9 files changed, 54 insertions(+), 522 deletions(-) delete mode 100644 p2p/nat.go delete mode 100644 p2p/natpmp.go delete mode 100644 p2p/natupnp.go diff --git a/cmd/ethereum/flags.go b/cmd/ethereum/flags.go index 594acdf7f2..99e094b476 100644 --- a/cmd/ethereum/flags.go +++ b/cmd/ethereum/flags.go @@ -31,6 +31,7 @@ import ( "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/logger" + "github.com/ethereum/go-ethereum/p2p/nat" "github.com/ethereum/go-ethereum/vm" ) @@ -44,8 +45,6 @@ var ( StartWebSockets bool RpcPort int WsPort int - NatType string - PMPGateway string OutboundPort string ShowGenesis bool AddPeer string @@ -53,6 +52,7 @@ var ( GenAddr bool BootNodes string NodeKey *ecdsa.PrivateKey + NAT nat.Interface SecretFile string ExportDir string NonInteractive bool @@ -127,18 +127,21 @@ func Init() { var ( nodeKeyFile = flag.String("nodekey", "", "network private key file") nodeKeyHex = flag.String("nodekeyhex", "", "network private key (for testing)") + natstr = flag.String("nat", "any", "port mapping mechanism (any|none|upnp|pmp|extip:)") ) flag.BoolVar(&Dial, "dial", true, "dial out connections (default on)") flag.BoolVar(&SHH, "shh", true, "run whisper protocol (default on)") flag.StringVar(&OutboundPort, "port", "30303", "listening port") - flag.StringVar(&NatType, "nat", "", "NAT support (UPNP|PMP) (none)") - flag.StringVar(&PMPGateway, "pmp", "", "Gateway IP for NAT-PMP") + flag.StringVar(&BootNodes, "bootnodes", "", "space-separated node URLs for discovery bootstrap") flag.IntVar(&MaxPeer, "maxpeer", 30, "maximum desired peers") flag.Parse() var err error + if NAT, err = nat.Parse(*natstr); err != nil { + log.Fatalf("-nat: %v", err) + } switch { case *nodeKeyFile != "" && *nodeKeyHex != "": log.Fatal("Options -nodekey and -nodekeyhex are mutually exclusive") diff --git a/cmd/ethereum/main.go b/cmd/ethereum/main.go index 3f616c0948..d2b3418cdf 100644 --- a/cmd/ethereum/main.go +++ b/cmd/ethereum/main.go @@ -62,20 +62,19 @@ func main() { utils.InitConfig(VmType, ConfigFile, Datadir, "ETH") ethereum, err := eth.New(ð.Config{ - Name: p2p.MakeName(ClientIdentifier, Version), - KeyStore: KeyStore, - DataDir: Datadir, - LogFile: LogFile, - LogLevel: LogLevel, - MaxPeers: MaxPeer, - Port: OutboundPort, - NATType: PMPGateway, - PMPGateway: PMPGateway, - KeyRing: KeyRing, - Shh: SHH, - Dial: Dial, - BootNodes: BootNodes, - NodeKey: NodeKey, + Name: p2p.MakeName(ClientIdentifier, Version), + KeyStore: KeyStore, + DataDir: Datadir, + LogFile: LogFile, + LogLevel: LogLevel, + MaxPeers: MaxPeer, + Port: OutboundPort, + NAT: NAT, + KeyRing: KeyRing, + Shh: SHH, + Dial: Dial, + BootNodes: BootNodes, + NodeKey: NodeKey, }) if err != nil { diff --git a/cmd/mist/flags.go b/cmd/mist/flags.go index dd72b5043f..eb280f71bd 100644 --- a/cmd/mist/flags.go +++ b/cmd/mist/flags.go @@ -34,6 +34,7 @@ import ( "bitbucket.org/kardianos/osext" "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/logger" + "github.com/ethereum/go-ethereum/p2p/nat" "github.com/ethereum/go-ethereum/vm" ) @@ -41,12 +42,10 @@ var ( Identifier string KeyRing string KeyStore string - PMPGateway string StartRpc bool StartWebSockets bool RpcPort int WsPort int - NatType string OutboundPort string ShowGenesis bool AddPeer string @@ -54,6 +53,7 @@ var ( GenAddr bool BootNodes string NodeKey *ecdsa.PrivateKey + NAT nat.Interface SecretFile string ExportDir string NonInteractive bool @@ -117,7 +117,6 @@ func Init() { flag.BoolVar(&StartWebSockets, "ws", false, "start websocket server") flag.BoolVar(&NonInteractive, "y", false, "non-interactive mode (say yes to confirmations)") flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key") - flag.StringVar(&NatType, "nat", "", "NAT support (UPNP|PMP) (none)") flag.StringVar(&SecretFile, "import", "", "imports the file given (hex or mnemonic formats)") flag.StringVar(&ExportDir, "export", "", "exports the session keyring to files in the directory given") flag.StringVar(&LogFile, "logfile", "", "log file (defaults to standard output)") @@ -132,15 +131,18 @@ func Init() { var ( nodeKeyFile = flag.String("nodekey", "", "network private key file") nodeKeyHex = flag.String("nodekeyhex", "", "network private key (for testing)") + natstr = flag.String("nat", "any", "port mapping mechanism (any|none|upnp|pmp|extip:)") ) flag.StringVar(&OutboundPort, "port", "30303", "listening port") - flag.StringVar(&PMPGateway, "pmp", "", "Gateway IP for NAT-PMP") flag.StringVar(&BootNodes, "bootnodes", "", "space-separated node URLs for discovery bootstrap") flag.IntVar(&MaxPeer, "maxpeer", 30, "maximum desired peers") flag.Parse() var err error + if NAT, err = nat.Parse(*natstr); err != nil { + log.Fatalf("-nat: %v", err) + } switch { case *nodeKeyFile != "" && *nodeKeyHex != "": log.Fatal("Options -nodekey and -nodekeyhex are mutually exclusive") diff --git a/cmd/mist/main.go b/cmd/mist/main.go index 4d6bac9b7d..52b5e4e944 100644 --- a/cmd/mist/main.go +++ b/cmd/mist/main.go @@ -52,19 +52,18 @@ func run() error { config := utils.InitConfig(VmType, ConfigFile, Datadir, "ETH") ethereum, err := eth.New(ð.Config{ - Name: p2p.MakeName(ClientIdentifier, Version), - KeyStore: KeyStore, - DataDir: Datadir, - LogFile: LogFile, - LogLevel: LogLevel, - MaxPeers: MaxPeer, - Port: OutboundPort, - NATType: NatType, - PMPGateway: PMPGateway, - BootNodes: BootNodes, - NodeKey: NodeKey, - KeyRing: KeyRing, - Dial: true, + Name: p2p.MakeName(ClientIdentifier, Version), + KeyStore: KeyStore, + DataDir: Datadir, + LogFile: LogFile, + LogLevel: LogLevel, + MaxPeers: MaxPeer, + Port: OutboundPort, + NAT: NAT, + BootNodes: BootNodes, + NodeKey: NodeKey, + KeyRing: KeyRing, + Dial: true, }) if err != nil { mainlogger.Fatalln(err) diff --git a/eth/backend.go b/eth/backend.go index f3e4842a77..29cf7d8363 100644 --- a/eth/backend.go +++ b/eth/backend.go @@ -13,6 +13,7 @@ import ( ethlogger "github.com/ethereum/go-ethereum/logger" "github.com/ethereum/go-ethereum/p2p" "github.com/ethereum/go-ethereum/p2p/discover" + "github.com/ethereum/go-ethereum/p2p/nat" "github.com/ethereum/go-ethereum/pow/ezp" "github.com/ethereum/go-ethereum/rpc" "github.com/ethereum/go-ethereum/whisper" @@ -28,10 +29,8 @@ type Config struct { LogLevel int KeyRing string - MaxPeers int - Port string - NATType string - PMPGateway string + MaxPeers int + Port string // This should be a space-separated list of // discovery node URLs. @@ -41,6 +40,7 @@ type Config struct { // If nil, an ephemeral key is used. NodeKey *ecdsa.PrivateKey + NAT nat.Interface Shh bool Dial bool @@ -147,10 +147,6 @@ func New(config *Config) (*Ethereum, error) { ethProto := EthProtocol(eth.txPool, eth.chainManager, eth.blockPool) protocols := []p2p.Protocol{ethProto, eth.whisper.Protocol()} - nat, err := p2p.ParseNAT(config.NATType, config.PMPGateway) - if err != nil { - return nil, err - } netprv := config.NodeKey if netprv == nil { if netprv, err = crypto.GenerateKey(); err != nil { @@ -163,7 +159,7 @@ func New(config *Config) (*Ethereum, error) { MaxPeers: config.MaxPeers, Protocols: protocols, Blacklist: eth.blacklist, - NAT: nat, + NAT: config.NAT, NoDial: !config.Dial, BootstrapNodes: config.parseBootNodes(), } diff --git a/p2p/nat.go b/p2p/nat.go deleted file mode 100644 index 9b771c3e8c..0000000000 --- a/p2p/nat.go +++ /dev/null @@ -1,23 +0,0 @@ -package p2p - -import ( - "fmt" - "net" -) - -func ParseNAT(natType string, gateway string) (nat NAT, err error) { - switch natType { - case "UPNP": - nat = UPNP() - case "PMP": - ip := net.ParseIP(gateway) - if ip == nil { - return nil, fmt.Errorf("cannot resolve PMP gateway IP %s", gateway) - } - nat = PMP(ip) - case "": - default: - return nil, fmt.Errorf("unrecognised NAT type '%s'", natType) - } - return -} diff --git a/p2p/natpmp.go b/p2p/natpmp.go deleted file mode 100644 index 6714678c4c..0000000000 --- a/p2p/natpmp.go +++ /dev/null @@ -1,55 +0,0 @@ -package p2p - -import ( - "fmt" - "net" - "time" - - natpmp "github.com/jackpal/go-nat-pmp" -) - -// Adapt the NAT-PMP protocol to the NAT interface - -// TODO: -// + Register for changes to the external address. -// + Re-register port mapping when router reboots. -// + A mechanism for keeping a port mapping registered. -// + Discover gateway address automatically. - -type natPMPClient struct { - client *natpmp.Client -} - -// PMP returns a NAT traverser that uses NAT-PMP. The provided gateway -// address should be the IP of your router. -func PMP(gateway net.IP) (nat NAT) { - return &natPMPClient{natpmp.NewClient(gateway)} -} - -func (*natPMPClient) String() string { - return "NAT-PMP" -} - -func (n *natPMPClient) GetExternalAddress() (net.IP, error) { - response, err := n.client.GetExternalAddress() - if err != nil { - return nil, err - } - return response.ExternalIPAddress[:], nil -} - -func (n *natPMPClient) AddPortMapping(protocol string, extport, intport int, name string, lifetime time.Duration) error { - if lifetime <= 0 { - return fmt.Errorf("lifetime must not be <= 0") - } - // Note order of port arguments is switched between our AddPortMapping and the client's AddPortMapping. - _, err := n.client.AddPortMapping(protocol, intport, extport, int(lifetime/time.Second)) - return err -} - -func (n *natPMPClient) DeletePortMapping(protocol string, externalPort, internalPort int) (err error) { - // To destroy a mapping, send an add-port with - // an internalPort of the internal port to destroy, an external port of zero and a time of zero. - _, err = n.client.AddPortMapping(protocol, internalPort, 0, 0) - return -} diff --git a/p2p/natupnp.go b/p2p/natupnp.go deleted file mode 100644 index 2e0d8ce8d5..0000000000 --- a/p2p/natupnp.go +++ /dev/null @@ -1,341 +0,0 @@ -package p2p - -// Just enough UPnP to be able to forward ports -// - -import ( - "bytes" - "encoding/xml" - "errors" - "fmt" - "net" - "net/http" - "os" - "strconv" - "strings" - "time" -) - -const ( - upnpDiscoverAttempts = 3 - upnpDiscoverTimeout = 5 * time.Second -) - -// UPNP returns a NAT port mapper that uses UPnP. It will attempt to -// discover the address of your router using UDP broadcasts. -func UPNP() NAT { - return &upnpNAT{} -} - -type upnpNAT struct { - serviceURL string - ourIP string -} - -func (n *upnpNAT) String() string { - return "UPNP" -} - -func (n *upnpNAT) discover() error { - if n.serviceURL != "" { - // already discovered - return nil - } - - ssdp, err := net.ResolveUDPAddr("udp4", "239.255.255.250:1900") - if err != nil { - return err - } - // TODO: try on all network interfaces simultaneously. - // Broadcasting on 0.0.0.0 could select a random interface - // to send on (platform specific). - conn, err := net.ListenPacket("udp4", ":0") - if err != nil { - return err - } - defer conn.Close() - - conn.SetDeadline(time.Now().Add(10 * time.Second)) - st := "ST: urn:schemas-upnp-org:device:InternetGatewayDevice:1\r\n" - buf := bytes.NewBufferString( - "M-SEARCH * HTTP/1.1\r\n" + - "HOST: 239.255.255.250:1900\r\n" + - st + - "MAN: \"ssdp:discover\"\r\n" + - "MX: 2\r\n\r\n") - message := buf.Bytes() - answerBytes := make([]byte, 1024) - for i := 0; i < upnpDiscoverAttempts; i++ { - _, err = conn.WriteTo(message, ssdp) - if err != nil { - return err - } - nn, _, err := conn.ReadFrom(answerBytes) - if err != nil { - continue - } - answer := string(answerBytes[0:nn]) - if strings.Index(answer, "\r\n"+st) < 0 { - continue - } - // HTTP header field names are case-insensitive. - // http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2 - locString := "\r\nlocation: " - answer = strings.ToLower(answer) - locIndex := strings.Index(answer, locString) - if locIndex < 0 { - continue - } - loc := answer[locIndex+len(locString):] - endIndex := strings.Index(loc, "\r\n") - if endIndex < 0 { - continue - } - locURL := loc[0:endIndex] - var serviceURL string - serviceURL, err = getServiceURL(locURL) - if err != nil { - return err - } - var ourIP string - ourIP, err = getOurIP() - if err != nil { - return err - } - n.serviceURL = serviceURL - n.ourIP = ourIP - return nil - } - return errors.New("UPnP port discovery failed.") -} - -func (n *upnpNAT) GetExternalAddress() (addr net.IP, err error) { - if err := n.discover(); err != nil { - return nil, err - } - info, err := n.getStatusInfo() - return net.ParseIP(info.externalIpAddress), err -} - -func (n *upnpNAT) AddPortMapping(protocol string, extport, intport int, description string, lifetime time.Duration) error { - if err := n.discover(); err != nil { - return err - } - - // A single concatenation would break ARM compilation. - message := "\r\n" + - "" + strconv.Itoa(extport) - message += "" + protocol + "" - message += "" + strconv.Itoa(extport) + "" + - "" + n.ourIP + "" + - "1" - message += description + - "" + fmt.Sprint(lifetime/time.Second) + - "" - - // TODO: check response to see if the port was forwarded - _, err := soapRequest(n.serviceURL, "AddPortMapping", message) - return err -} - -func (n *upnpNAT) DeletePortMapping(protocol string, externalPort, internalPort int) error { - if err := n.discover(); err != nil { - return err - } - - message := "\r\n" + - "" + strconv.Itoa(externalPort) + - "" + protocol + "" + - "" - - // TODO: check response to see if the port was deleted - _, err := soapRequest(n.serviceURL, "DeletePortMapping", message) - return err -} - -type statusInfo struct { - externalIpAddress string -} - -func (n *upnpNAT) getStatusInfo() (info statusInfo, err error) { - message := "\r\n" + - "" - - var response *http.Response - response, err = soapRequest(n.serviceURL, "GetStatusInfo", message) - if err != nil { - return - } - - // TODO: Write a soap reply parser. It has to eat the Body and envelope tags... - - response.Body.Close() - return -} - -// service represents the Service type in an UPnP xml description. -// Only the parts we care about are present and thus the xml may have more -// fields than present in the structure. -type service struct { - ServiceType string `xml:"serviceType"` - ControlURL string `xml:"controlURL"` -} - -// deviceList represents the deviceList type in an UPnP xml description. -// Only the parts we care about are present and thus the xml may have more -// fields than present in the structure. -type deviceList struct { - XMLName xml.Name `xml:"deviceList"` - Device []device `xml:"device"` -} - -// serviceList represents the serviceList type in an UPnP xml description. -// Only the parts we care about are present and thus the xml may have more -// fields than present in the structure. -type serviceList struct { - XMLName xml.Name `xml:"serviceList"` - Service []service `xml:"service"` -} - -// device represents the device type in an UPnP xml description. -// Only the parts we care about are present and thus the xml may have more -// fields than present in the structure. -type device struct { - XMLName xml.Name `xml:"device"` - DeviceType string `xml:"deviceType"` - DeviceList deviceList `xml:"deviceList"` - ServiceList serviceList `xml:"serviceList"` -} - -// specVersion represents the specVersion in a UPnP xml description. -// Only the parts we care about are present and thus the xml may have more -// fields than present in the structure. -type specVersion struct { - XMLName xml.Name `xml:"specVersion"` - Major int `xml:"major"` - Minor int `xml:"minor"` -} - -// root represents the Root document for a UPnP xml description. -// Only the parts we care about are present and thus the xml may have more -// fields than present in the structure. -type root struct { - XMLName xml.Name `xml:"root"` - SpecVersion specVersion - Device device -} - -func getChildDevice(d *device, deviceType string) *device { - dl := d.DeviceList.Device - for i := 0; i < len(dl); i++ { - if dl[i].DeviceType == deviceType { - return &dl[i] - } - } - return nil -} - -func getChildService(d *device, serviceType string) *service { - sl := d.ServiceList.Service - for i := 0; i < len(sl); i++ { - if sl[i].ServiceType == serviceType { - return &sl[i] - } - } - return nil -} - -func getOurIP() (ip string, err error) { - hostname, err := os.Hostname() - if err != nil { - return - } - p, err := net.LookupIP(hostname) - if err != nil && len(p) > 0 { - return - } - return p[0].String(), nil -} - -func getServiceURL(rootURL string) (url string, err error) { - r, err := http.Get(rootURL) - if err != nil { - return - } - defer r.Body.Close() - if r.StatusCode >= 400 { - err = errors.New(string(r.StatusCode)) - return - } - var root root - err = xml.NewDecoder(r.Body).Decode(&root) - - if err != nil { - return - } - a := &root.Device - if a.DeviceType != "urn:schemas-upnp-org:device:InternetGatewayDevice:1" { - err = errors.New("No InternetGatewayDevice") - return - } - b := getChildDevice(a, "urn:schemas-upnp-org:device:WANDevice:1") - if b == nil { - err = errors.New("No WANDevice") - return - } - c := getChildDevice(b, "urn:schemas-upnp-org:device:WANConnectionDevice:1") - if c == nil { - err = errors.New("No WANConnectionDevice") - return - } - d := getChildService(c, "urn:schemas-upnp-org:service:WANIPConnection:1") - if d == nil { - err = errors.New("No WANIPConnection") - return - } - url = combineURL(rootURL, d.ControlURL) - return -} - -func combineURL(rootURL, subURL string) string { - protocolEnd := "://" - protoEndIndex := strings.Index(rootURL, protocolEnd) - a := rootURL[protoEndIndex+len(protocolEnd):] - rootIndex := strings.Index(a, "/") - return rootURL[0:protoEndIndex+len(protocolEnd)+rootIndex] + subURL -} - -func soapRequest(url, function, message string) (r *http.Response, err error) { - fullMessage := "" + - "\r\n" + - "" + message + "" - - req, err := http.NewRequest("POST", url, strings.NewReader(fullMessage)) - if err != nil { - return - } - req.Header.Set("Content-Type", "text/xml ; charset=\"utf-8\"") - req.Header.Set("User-Agent", "Darwin/10.0.0, UPnP/1.0, MiniUPnPc/1.3") - //req.Header.Set("Transfer-Encoding", "chunked") - req.Header.Set("SOAPAction", "\"urn:schemas-upnp-org:service:WANIPConnection:1#"+function+"\"") - req.Header.Set("Connection", "Close") - req.Header.Set("Cache-Control", "no-cache") - req.Header.Set("Pragma", "no-cache") - - r, err = http.DefaultClient.Do(req) - if err != nil { - return - } - - if r.Body != nil { - defer r.Body.Close() - } - - if r.StatusCode >= 400 { - // log.Stderr(function, r.StatusCode) - err = errors.New("Error " + strconv.Itoa(r.StatusCode) + " for " + function) - r = nil - return - } - return -} diff --git a/p2p/server.go b/p2p/server.go index 3cab611021..a0f2dee23d 100644 --- a/p2p/server.go +++ b/p2p/server.go @@ -13,13 +13,12 @@ import ( "github.com/ethereum/go-ethereum/logger" "github.com/ethereum/go-ethereum/p2p/discover" + "github.com/ethereum/go-ethereum/p2p/nat" ) const ( - defaultDialTimeout = 10 * time.Second - refreshPeersInterval = 30 * time.Second - portMappingUpdateInterval = 15 * time.Minute - portMappingTimeout = 20 * time.Minute + defaultDialTimeout = 10 * time.Second + refreshPeersInterval = 30 * time.Second ) var srvlog = logger.NewLogger("P2P Server") @@ -72,7 +71,7 @@ type Server struct { // If set to a non-nil value, the given NAT port mapper // is used to make the listening port available to the // Internet. - NAT NAT + NAT nat.Interface // If Dialer is set to a non-nil value, the given Dialer // is used to dial outbound peer connections. @@ -89,7 +88,6 @@ type Server struct { lock sync.RWMutex running bool listener net.Listener - laddr *net.TCPAddr // real listen addr peers map[discover.NodeID]*Peer ntab *discover.Table @@ -100,16 +98,6 @@ type Server struct { peerConnect chan *discover.Node } -// NAT is implemented by NAT traversal methods. -type NAT interface { - GetExternalAddress() (net.IP, error) - AddPortMapping(protocol string, extport, intport int, name string, lifetime time.Duration) error - DeletePortMapping(protocol string, extport, intport int) error - - // Should return name of the method. - String() string -} - type handshakeFunc func(io.ReadWriter, *ecdsa.PrivateKey, *discover.Node) (discover.NodeID, []byte, error) type newPeerHook func(*Peer) @@ -220,14 +208,17 @@ func (srv *Server) startListening() error { if err != nil { return err } - srv.ListenAddr = listener.Addr().String() - srv.laddr = listener.Addr().(*net.TCPAddr) + laddr := listener.Addr().(*net.TCPAddr) + srv.ListenAddr = laddr.String() srv.listener = listener srv.loopWG.Add(1) go srv.listenLoop() - if !srv.laddr.IP.IsLoopback() && srv.NAT != nil { + if !laddr.IP.IsLoopback() && srv.NAT != nil { srv.loopWG.Add(1) - go srv.natLoop(srv.laddr.Port) + go func() { + nat.Map(srv.NAT, srv.quit, "tcp", laddr.Port, laddr.Port, "ethereum p2p") + srv.loopWG.Done() + }() } return nil } @@ -276,45 +267,6 @@ func (srv *Server) listenLoop() { } } -func (srv *Server) natLoop(port int) { - defer srv.loopWG.Done() - for { - srv.updatePortMapping(port) - select { - case <-time.After(portMappingUpdateInterval): - // one more round - case <-srv.quit: - srv.removePortMapping(port) - return - } - } -} - -func (srv *Server) updatePortMapping(port int) { - srvlog.Infoln("Attempting to map port", port, "with", srv.NAT) - err := srv.NAT.AddPortMapping("tcp", port, port, "ethereum p2p", portMappingTimeout) - if err != nil { - srvlog.Errorln("Port mapping error:", err) - return - } - extip, err := srv.NAT.GetExternalAddress() - if err != nil { - srvlog.Errorln("Error getting external IP:", err) - return - } - srv.lock.Lock() - extaddr := *(srv.listener.Addr().(*net.TCPAddr)) - extaddr.IP = extip - srvlog.Infoln("Mapped port, external addr is", &extaddr) - srv.laddr = &extaddr - srv.lock.Unlock() -} - -func (srv *Server) removePortMapping(port int) { - srvlog.Infoln("Removing port mapping for", port, "with", srv.NAT) - srv.NAT.DeletePortMapping("tcp", port, port) -} - func (srv *Server) dialLoop() { defer srv.loopWG.Done() refresh := time.NewTicker(refreshPeersInterval) From 82f0bd9009d8d577c86e800e9673a1972117113d Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Thu, 12 Feb 2015 11:59:52 +0100 Subject: [PATCH 45/54] p2p/discover: code review fixes --- p2p/discover/node.go | 4 +++- p2p/discover/table.go | 8 ++++---- p2p/discover/udp.go | 4 ++-- 3 files changed, 9 insertions(+), 7 deletions(-) diff --git a/p2p/discover/node.go b/p2p/discover/node.go index a49a2f5473..c6d2e97661 100644 --- a/p2p/discover/node.go +++ b/p2p/discover/node.go @@ -18,6 +18,8 @@ import ( "github.com/ethereum/go-ethereum/rlp" ) +const nodeIDBits = 512 + // Node represents a host on the network. type Node struct { ID NodeID @@ -135,7 +137,7 @@ func (n *Node) DecodeRLP(s *rlp.Stream) (err error) { // NodeID is a unique identifier for each node. // The node identifier is a marshaled elliptic curve public key. -type NodeID [512 / 8]byte +type NodeID [nodeIDBits / 8]byte // NodeID prints as a long hexadecimal number. func (n NodeID) String() string { diff --git a/p2p/discover/table.go b/p2p/discover/table.go index 1ff2c90d9e..e3bec93287 100644 --- a/p2p/discover/table.go +++ b/p2p/discover/table.go @@ -14,9 +14,9 @@ import ( ) const ( - alpha = 3 // Kademlia concurrency factor - bucketSize = 16 // Kademlia bucket size - nBuckets = len(NodeID{})*8 + 1 // Number of buckets + alpha = 3 // Kademlia concurrency factor + bucketSize = 16 // Kademlia bucket size + nBuckets = nodeIDBits + 1 // Number of buckets ) type Table struct { @@ -100,7 +100,7 @@ func (tab *Table) Lookup(target NodeID) []*Node { tab.mutex.Unlock() for { - // ask the closest nodes that we haven't asked yet + // ask the alpha closest nodes that we haven't asked yet for i := 0; i < len(result.entries) && pendingQueries < alpha; i++ { n := result.entries[i] if !asked[n.ID] { diff --git a/p2p/discover/udp.go b/p2p/discover/udp.go index 4ad5d9cc42..1f91641f30 100644 --- a/p2p/discover/udp.go +++ b/p2p/discover/udp.go @@ -28,7 +28,7 @@ var ( const ( respTimeout = 300 * time.Millisecond sendTimeout = 300 * time.Millisecond - expiration = 3 * time.Second + expiration = 20 * time.Second refreshInterval = 1 * time.Hour ) @@ -185,7 +185,7 @@ func (t *udp) findnode(to *Node, target NodeID) ([]*Node, error) { nodes = append(nodes, n) } } - return nreceived == bucketSize + return nreceived >= bucketSize }) t.send(to, findnodePacket, findnode{ From 170eb3ac684231dc2ddebc34e7006e0f2b5fc0c1 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Fri, 13 Feb 2015 11:38:34 +0100 Subject: [PATCH 46/54] p2p/discover: map listening port using configured mechanism --- cmd/bootnode/main.go | 13 ++++++++++--- p2p/discover/udp.go | 23 +++++++++++++++++------ p2p/discover/udp_test.go | 14 +++++++------- p2p/server.go | 3 +-- 4 files changed, 35 insertions(+), 18 deletions(-) diff --git a/cmd/bootnode/main.go b/cmd/bootnode/main.go index fd96a7b48f..dda9f34d42 100644 --- a/cmd/bootnode/main.go +++ b/cmd/bootnode/main.go @@ -30,6 +30,7 @@ import ( "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/logger" "github.com/ethereum/go-ethereum/p2p/discover" + "github.com/ethereum/go-ethereum/p2p/nat" ) func main() { @@ -38,8 +39,10 @@ func main() { genKey = flag.String("genkey", "", "generate a node key and quit") nodeKeyFile = flag.String("nodekey", "", "private key filename") nodeKeyHex = flag.String("nodekeyhex", "", "private key as hex (for testing)") - nodeKey *ecdsa.PrivateKey - err error + natdesc = flag.String("nat", "none", "port mapping mechanism (any|none|upnp|pmp|extip:)") + + nodeKey *ecdsa.PrivateKey + err error ) flag.Parse() logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.DebugLevel)) @@ -49,6 +52,10 @@ func main() { os.Exit(0) } + natm, err := nat.Parse(*natdesc) + if err != nil { + log.Fatalf("-nat: %v", err) + } switch { case *nodeKeyFile == "" && *nodeKeyHex == "": log.Fatal("Use -nodekey or -nodekeyhex to specify a private key") @@ -64,7 +71,7 @@ func main() { } } - if _, err := discover.ListenUDP(nodeKey, *listenAddr); err != nil { + if _, err := discover.ListenUDP(nodeKey, *listenAddr, natm); err != nil { log.Fatal(err) } select {} diff --git a/p2p/discover/udp.go b/p2p/discover/udp.go index 1f91641f30..a9ed7fcb87 100644 --- a/p2p/discover/udp.go +++ b/p2p/discover/udp.go @@ -10,6 +10,7 @@ import ( "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/logger" + "github.com/ethereum/go-ethereum/p2p/nat" "github.com/ethereum/go-ethereum/rlp" ) @@ -82,6 +83,7 @@ type udp struct { addpending chan *pending replies chan reply closing chan struct{} + nat nat.Interface *Table } @@ -121,17 +123,26 @@ type reply struct { } // ListenUDP returns a new table that listens for UDP packets on laddr. -func ListenUDP(priv *ecdsa.PrivateKey, laddr string) (*Table, error) { - net, realaddr, err := listen(priv, laddr) +func ListenUDP(priv *ecdsa.PrivateKey, laddr string, natm nat.Interface) (*Table, error) { + t, realaddr, err := listen(priv, laddr, natm) if err != nil { return nil, err } - net.Table = newTable(net, PubkeyID(&priv.PublicKey), realaddr) - log.Debugf("Listening, %v\n", net.self) - return net.Table, nil + if natm != nil { + if !realaddr.IP.IsLoopback() { + go nat.Map(natm, t.closing, "udp", realaddr.Port, realaddr.Port, "ethereum discovery") + } + // TODO: react to external IP changes over time. + if ext, err := natm.ExternalIP(); err == nil { + realaddr = &net.UDPAddr{IP: ext, Port: realaddr.Port} + } + } + t.Table = newTable(t, PubkeyID(&priv.PublicKey), realaddr) + log.Infoln("Listening, ", t.self) + return t.Table, nil } -func listen(priv *ecdsa.PrivateKey, laddr string) (*udp, *net.UDPAddr, error) { +func listen(priv *ecdsa.PrivateKey, laddr string, nat nat.Interface) (*udp, *net.UDPAddr, error) { addr, err := net.ResolveUDPAddr("udp", laddr) if err != nil { return nil, nil, err diff --git a/p2p/discover/udp_test.go b/p2p/discover/udp_test.go index 740d0a5d9e..0a8ff63589 100644 --- a/p2p/discover/udp_test.go +++ b/p2p/discover/udp_test.go @@ -18,8 +18,8 @@ func init() { func TestUDP_ping(t *testing.T) { t.Parallel() - n1, _ := ListenUDP(newkey(), "127.0.0.1:0") - n2, _ := ListenUDP(newkey(), "127.0.0.1:0") + n1, _ := ListenUDP(newkey(), "127.0.0.1:0", nil) + n2, _ := ListenUDP(newkey(), "127.0.0.1:0", nil) defer n1.Close() defer n2.Close() @@ -48,8 +48,8 @@ func find(tab *Table, id NodeID) *Node { func TestUDP_findnode(t *testing.T) { t.Parallel() - n1, _ := ListenUDP(newkey(), "127.0.0.1:0") - n2, _ := ListenUDP(newkey(), "127.0.0.1:0") + n1, _ := ListenUDP(newkey(), "127.0.0.1:0", nil) + n2, _ := ListenUDP(newkey(), "127.0.0.1:0", nil) defer n1.Close() defer n2.Close() @@ -98,7 +98,7 @@ func TestUDP_replytimeout(t *testing.T) { } defer fd.Close() - n1, _ := ListenUDP(newkey(), "127.0.0.1:0") + n1, _ := ListenUDP(newkey(), "127.0.0.1:0", nil) defer n1.Close() n2 := n1.bumpOrAdd(randomID(n1.self.ID, 10), fd.LocalAddr().(*net.UDPAddr)) @@ -116,8 +116,8 @@ func TestUDP_replytimeout(t *testing.T) { func TestUDP_findnodeMultiReply(t *testing.T) { t.Parallel() - n1, _ := ListenUDP(newkey(), "127.0.0.1:0") - n2, _ := ListenUDP(newkey(), "127.0.0.1:0") + n1, _ := ListenUDP(newkey(), "127.0.0.1:0", nil) + n2, _ := ListenUDP(newkey(), "127.0.0.1:0", nil) udp2 := n2.net.(*udp) defer n1.Close() defer n2.Close() diff --git a/p2p/server.go b/p2p/server.go index a0f2dee23d..e44f3d7ab6 100644 --- a/p2p/server.go +++ b/p2p/server.go @@ -182,7 +182,7 @@ func (srv *Server) Start() (err error) { } // dial stuff - dt, err := discover.ListenUDP(srv.PrivateKey, srv.ListenAddr) + dt, err := discover.ListenUDP(srv.PrivateKey, srv.ListenAddr, srv.NAT) if err != nil { return err } @@ -194,7 +194,6 @@ func (srv *Server) Start() (err error) { srv.loopWG.Add(1) go srv.dialLoop() } - if srv.NoDial && srv.ListenAddr == "" { srvlog.Warnln("I will be kind-of useless, neither dialing nor listening.") } From 5110f80bba13e3758ae1836a88afee123df81e3e Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Fri, 13 Feb 2015 14:44:00 +0100 Subject: [PATCH 47/54] p2p: improve read deadlines There are now two deadlines, frameReadTimeout and payloadReadTimeout. The frame timeout is longer and allows for connections that are idle. The message timeout is still short and ensures that we don't get stuck in the middle of a message. --- p2p/message.go | 28 +++++++++++++++++++++++++--- p2p/peer.go | 14 ++------------ 2 files changed, 27 insertions(+), 15 deletions(-) diff --git a/p2p/message.go b/p2p/message.go index dfc33f3497..07916f7b3a 100644 --- a/p2p/message.go +++ b/p2p/message.go @@ -18,6 +18,28 @@ import ( "github.com/ethereum/go-ethereum/rlp" ) +// parameters for frameRW +const ( + // maximum time allowed for reading a message header. + // this is effectively the amount of time a connection can be idle. + frameReadTimeout = 1 * time.Minute + + // maximum time allowed for reading the payload data of a message. + // this is shorter than (and distinct from) frameReadTimeout because + // the connection is not considered idle while a message is transferred. + // this also limits the payload size of messages to how much the connection + // can transfer within the timeout. + payloadReadTimeout = 5 * time.Second + + // maximum amount of time allowed for writing a complete message. + msgWriteTimeout = 5 * time.Second + + // messages smaller than this many bytes will be read at + // once before passing them to a protocol. this increases + // concurrency in the processing. + wholePayloadSize = 64 * 1024 +) + // Msg defines the structure of a p2p message. // // Note that a Msg can only be sent once since the Payload reader is @@ -167,9 +189,7 @@ func makeListHeader(length uint32) []byte { func (rw *frameRW) ReadMsg() (msg Msg, err error) { <-rw.rsync // wait until bufconn is ours - // this read timeout applies also to the payload. - // TODO: proper read timeout - rw.SetReadDeadline(time.Now().Add(msgReadTimeout)) + rw.SetReadDeadline(time.Now().Add(frameReadTimeout)) // read magic and payload size start := make([]byte, 8) @@ -193,6 +213,8 @@ func (rw *frameRW) ReadMsg() (msg Msg, err error) { } msg.Size = size - posr.p + rw.SetReadDeadline(time.Now().Add(payloadReadTimeout)) + if msg.Size <= wholePayloadSize { // msg is small, read all of it and move on to the next message. pbuf := make([]byte, msg.Size) diff --git a/p2p/peer.go b/p2p/peer.go index b61cf96daf..f779c1c02f 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -15,22 +15,12 @@ import ( "github.com/ethereum/go-ethereum/rlp" ) -const ( - // maximum amount of time allowed for reading a message - msgReadTimeout = 5 * time.Second - // maximum amount of time allowed for writing a message - msgWriteTimeout = 5 * time.Second - // messages smaller than this many bytes will be read at - // once before passing them to a protocol. - wholePayloadSize = 64 * 1024 - - disconnectGracePeriod = 2 * time.Second -) - const ( baseProtocolVersion = 2 baseProtocolLength = uint64(16) baseProtocolMaxMsgSize = 10 * 1024 * 1024 + + disconnectGracePeriod = 2 * time.Second ) const ( From 22ee366ed6419516eece4436c9f7b5b63ea8a713 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Fri, 13 Feb 2015 14:47:05 +0100 Subject: [PATCH 48/54] p2p: fix goroutine leak for invalid peers The deflect logic called Disconnect on the peer, but the peer never ran and wouldn't process the disconnect request. --- p2p/server.go | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/p2p/server.go b/p2p/server.go index e44f3d7ab6..f61bb897e7 100644 --- a/p2p/server.go +++ b/p2p/server.go @@ -351,19 +351,21 @@ func (srv *Server) startPeer(conn net.Conn, dest *discover.Node) { srvlog.Debugf("Encryption Handshake with %v failed: %v", conn.RemoteAddr(), err) return } - ourID := srv.ntab.Self() p := newPeer(conn, srv.Protocols, srv.Name, &ourID, &remoteID) if ok, reason := srv.addPeer(remoteID, p); !ok { - p.Disconnect(reason) + srvlog.DebugDetailf("Not adding %v (%v)\n", p, reason) + p.politeDisconnect(reason) return } + srvlog.Debugf("Added %v\n", p) if srv.newPeerHook != nil { srv.newPeerHook(p) } - p.run() + discreason := p.run() srv.removePeer(p) + srvlog.Debugf("Removed %v (%v)\n", p, discreason) } func (srv *Server) addPeer(id discover.NodeID, p *Peer) (bool, DiscReason) { @@ -381,14 +383,11 @@ func (srv *Server) addPeer(id discover.NodeID, p *Peer) (bool, DiscReason) { case id == srv.ntab.Self(): return false, DiscSelf } - srvlog.Debugf("Adding %v\n", p) srv.peers[id] = p return true, 0 } -// removes peer: sending disconnect msg, stop peer, remove rom list/table, release slot func (srv *Server) removePeer(p *Peer) { - srvlog.Debugf("Removing %v\n", p) srv.lock.Lock() delete(srv.peers, *p.remoteID) srv.lock.Unlock() From 7101f4499873fbf6a68cbe08a45797ff8ec71e74 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Fri, 13 Feb 2015 14:49:49 +0100 Subject: [PATCH 49/54] p2p: add I/O timeout for encrytion handshake --- p2p/server.go | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/p2p/server.go b/p2p/server.go index f61bb897e7..b933401501 100644 --- a/p2p/server.go +++ b/p2p/server.go @@ -17,6 +17,7 @@ import ( ) const ( + handshakeTimeout = 5 * time.Second defaultDialTimeout = 10 * time.Second refreshPeersInterval = 30 * time.Second ) @@ -344,7 +345,8 @@ func (srv *Server) findPeers() { } func (srv *Server) startPeer(conn net.Conn, dest *discover.Node) { - // TODO: I/O timeout, handle/store session token + // TODO: handle/store session token + conn.SetDeadline(time.Now().Add(handshakeTimeout)) remoteID, _, err := srv.handshakeFunc(conn, srv.PrivateKey, dest) if err != nil { conn.Close() From 5cc1256fd679cbb8cb80502494b8c02befc757c8 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Fri, 13 Feb 2015 14:50:14 +0100 Subject: [PATCH 50/54] p2p: ensure we don't dial ourself addPeer doesn't allow self connects, but we can avoid opening connections in the first place. --- p2p/server.go | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/p2p/server.go b/p2p/server.go index b933401501..e510be521b 100644 --- a/p2p/server.go +++ b/p2p/server.go @@ -289,10 +289,13 @@ func (srv *Server) dialLoop() { go srv.findPeers() case dest := <-srv.peerConnect: + // avoid dialing nodes that are already connected. + // there is another check for this in addPeer, + // which runs after the handshake. srv.lock.Lock() _, isconnected := srv.peers[dest.ID] srv.lock.Unlock() - if isconnected || dialing[dest.ID] { + if isconnected || dialing[dest.ID] || dest.ID == srv.ntab.Self() { continue } From cf754b9483a61075cf50eb4846eeecdc48ad37c0 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Fri, 13 Feb 2015 15:04:30 +0100 Subject: [PATCH 51/54] p2p/discover: fix race in ListenUDP udp.Table was assigned after the readLoop started, so packets could arrive and be processed before the Table was there. --- p2p/discover/udp.go | 41 +++++++++++++++++------------------------ 1 file changed, 17 insertions(+), 24 deletions(-) diff --git a/p2p/discover/udp.go b/p2p/discover/udp.go index a9ed7fcb87..b2a8954426 100644 --- a/p2p/discover/udp.go +++ b/p2p/discover/udp.go @@ -124,35 +124,14 @@ type reply struct { // ListenUDP returns a new table that listens for UDP packets on laddr. func ListenUDP(priv *ecdsa.PrivateKey, laddr string, natm nat.Interface) (*Table, error) { - t, realaddr, err := listen(priv, laddr, natm) - if err != nil { - return nil, err - } - if natm != nil { - if !realaddr.IP.IsLoopback() { - go nat.Map(natm, t.closing, "udp", realaddr.Port, realaddr.Port, "ethereum discovery") - } - // TODO: react to external IP changes over time. - if ext, err := natm.ExternalIP(); err == nil { - realaddr = &net.UDPAddr{IP: ext, Port: realaddr.Port} - } - } - t.Table = newTable(t, PubkeyID(&priv.PublicKey), realaddr) - log.Infoln("Listening, ", t.self) - return t.Table, nil -} - -func listen(priv *ecdsa.PrivateKey, laddr string, nat nat.Interface) (*udp, *net.UDPAddr, error) { addr, err := net.ResolveUDPAddr("udp", laddr) if err != nil { - return nil, nil, err + return nil, err } conn, err := net.ListenUDP("udp", addr) if err != nil { - return nil, nil, err + return nil, err } - realaddr := conn.LocalAddr().(*net.UDPAddr) - udp := &udp{ conn: conn, priv: priv, @@ -160,9 +139,23 @@ func listen(priv *ecdsa.PrivateKey, laddr string, nat nat.Interface) (*udp, *net addpending: make(chan *pending), replies: make(chan reply), } + + realaddr := conn.LocalAddr().(*net.UDPAddr) + if natm != nil { + if !realaddr.IP.IsLoopback() { + go nat.Map(natm, udp.closing, "udp", realaddr.Port, realaddr.Port, "ethereum discovery") + } + // TODO: react to external IP changes over time. + if ext, err := natm.ExternalIP(); err == nil { + realaddr = &net.UDPAddr{IP: ext, Port: realaddr.Port} + } + } + udp.Table = newTable(udp, PubkeyID(&priv.PublicKey), realaddr) + go udp.loop() go udp.readLoop() - return udp, realaddr, nil + log.Infoln("Listening, ", udp.self) + return udp.Table, nil } func (t *udp) close() { From fd3e1061e01690c7046a0d80635284c1592b7699 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Fri, 13 Feb 2015 15:06:06 +0100 Subject: [PATCH 52/54] p2p: handle disconnect before protocol handshake --- p2p/peer.go | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/p2p/peer.go b/p2p/peer.go index f779c1c02f..6aa78045bf 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -255,6 +255,13 @@ func readProtocolHandshake(p *Peer, rw MsgReadWriter) error { if err != nil { return err } + if msg.Code == discMsg { + // disconnect before protocol handshake is valid according to the + // spec and we send it ourself if Server.addPeer fails. + var reason DiscReason + rlp.Decode(msg.Payload, &reason) + return discRequestedError(reason) + } if msg.Code != handshakeMsg { return newPeerError(errProtocolBreach, "expected handshake, got %x", msg.Code) } From 32a9c0ca809508c1648b8f44f3e09725af7a80d3 Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Fri, 13 Feb 2015 15:08:40 +0100 Subject: [PATCH 53/54] p2p: bump devp2p protcol version to 3 For compatibility with cpp-ethereum --- p2p/peer.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/p2p/peer.go b/p2p/peer.go index 6aa78045bf..fd5bec7d5d 100644 --- a/p2p/peer.go +++ b/p2p/peer.go @@ -16,7 +16,7 @@ import ( ) const ( - baseProtocolVersion = 2 + baseProtocolVersion = 3 baseProtocolLength = uint64(16) baseProtocolMaxMsgSize = 10 * 1024 * 1024 From bde3ff16ad98cb4ab0befc899f7f0584d21ff9a4 Mon Sep 17 00:00:00 2001 From: obscuren Date: Fri, 13 Feb 2015 16:02:37 +0100 Subject: [PATCH 54/54] merge --- cmd/mist/assets/examples/coin.html | 6 + cmd/mist/assets/qml/main.qml | 869 +---------------------------- core/block_processor.go | 13 - core/manager.go | 1 - eth/backend.go | 21 +- 5 files changed, 17 insertions(+), 893 deletions(-) diff --git a/cmd/mist/assets/examples/coin.html b/cmd/mist/assets/examples/coin.html index 546c6f13f7..99e0c7643e 100644 --- a/cmd/mist/assets/examples/coin.html +++ b/cmd/mist/assets/examples/coin.html @@ -79,6 +79,12 @@ contract.received({from: eth.coinbase}).changed(function() { refresh(); }); + + var ev = contract.SingleTransact({}) + ev.watch(function(log) { + someElement.innerHTML += "tnaheousnthaoeu"; + }); + eth.watch('chain').changed(function() { refresh(); }); diff --git a/cmd/mist/assets/qml/main.qml b/cmd/mist/assets/qml/main.qml index 8f9a2d3cc0..2b56b72361 100644 --- a/cmd/mist/assets/qml/main.qml +++ b/cmd/mist/assets/qml/main.qml @@ -11,7 +11,6 @@ import "../ext/http.js" as Http ApplicationWindow { -<<<<<<< HEAD id: root //flags: Qt.FramelessWindowHint @@ -1102,870 +1101,4 @@ ApplicationWindow { addrField.focus = true } } - } -======= - id: root - - property var ethx : Eth.ethx - - width: 1200 - height: 820 - minimumWidth: 300 - - title: "Mist" - - TextField { - id: copyElementHax - visible: false - } - - function copyToClipboard(text) { - copyElementHax.text = text - copyElementHax.selectAll() - copyElementHax.copy() - } - - // Takes care of loading all default plugins - Component.onCompleted: { - var wallet = addPlugin("./views/wallet.qml", {noAdd: true, close: false, section: "ethereum", active: true}); - addPlugin("./views/miner.qml", {noAdd: true, close: false, section: "ethereum", active: true}); - - addPlugin("./views/transaction.qml", {noAdd: true, close: false, section: "legacy"}); - addPlugin("./views/whisper.qml", {noAdd: true, close: false, section: "legacy"}); - addPlugin("./views/chain.qml", {noAdd: true, close: false, section: "legacy"}); - addPlugin("./views/pending_tx.qml", {noAdd: true, close: false, section: "legacy"}); - addPlugin("./views/info.qml", {noAdd: true, close: false, section: "legacy"}); - - mainSplit.setView(wallet.view, wallet.menuItem); - - newBrowserTab(eth.assetPath("html/home.html")); - - // Command setup - gui.sendCommand(0) - } - - function activeView(view, menuItem) { - mainSplit.setView(view, menuItem) - if (view.hideUrl) { - urlPane.visible = false; - mainView.anchors.top = rootView.top - } else { - urlPane.visible = true; - mainView.anchors.top = divider.bottom - } - } - - function addViews(view, path, options) { - var views = mainSplit.addComponent(view, options) - views.menuItem.path = path - - mainSplit.views.push(views); - - if(!options.noAdd) { - gui.addPlugin(path) - } - - return views - } - - function addPlugin(path, options) { - try { - if(typeof(path) === "string" && /^https?/.test(path)) { - console.log('load http') - Http.request(path, function(o) { - if(o.status === 200) { - var view = Qt.createQmlObject(o.responseText, mainView, path) - addViews(view, path, options) - } - }) - - return - } - - var component = Qt.createComponent(path); - if(component.status != Component.Ready) { - if(component.status == Component.Error) { - ethx.note("error: ", component.errorString()); - } - - return - } - - var view = mainView.createView(component, options) - var views = addViews(view, path, options) - - return views - } catch(e) { - console.log(e) - } - } - - function newBrowserTab(url) { - var window = addPlugin("./views/browser.qml", {noAdd: true, close: true, section: "apps", active: true}); - window.view.url = url; - window.menuItem.title = "Mist"; - activeView(window.view, window.menuItem); - } - - menuBar: MenuBar { - Menu { - title: "File" - MenuItem { - text: "Import App" - shortcut: "Ctrl+o" - onTriggered: { - generalFileDialog.show(true, importApp) - } - } - - MenuItem { - text: "Add plugin" - onTriggered: { - generalFileDialog.show(true, function(path) { - addPlugin(path, {close: true, section: "apps"}) - }) - } - } - - MenuItem { - text: "New tab" - shortcut: "Ctrl+t" - onTriggered: { - newBrowserTab("about:blank"); - } - } - - MenuSeparator {} - - MenuItem { - text: "Import key" - shortcut: "Ctrl+i" - onTriggered: { - generalFileDialog.show(true, function(path) { - gui.importKey(path) - }) - } - } - - MenuItem { - text: "Export keys" - shortcut: "Ctrl+e" - onTriggered: { - generalFileDialog.show(false, function(path) { - }) - } - } - - } - - Menu { - title: "Developer" - MenuItem { - iconSource: "../icecream.png" - text: "Debugger" - shortcut: "Ctrl+d" - onTriggered: eth.startDebugger() - } - - MenuItem { - text: "Import Tx" - onTriggered: { - txImportDialog.visible = true - } - } - - MenuItem { - text: "Run JS file" - onTriggered: { - generalFileDialog.show(true, function(path) { - eth.evalJavascriptFile(path) - }) - } - } - - MenuItem { - text: "Dump state" - onTriggered: { - generalFileDialog.show(false, function(path) { - // Empty hash for latest - gui.dumpState("", path) - }) - } - } - - MenuSeparator {} - } - - Menu { - title: "Network" - MenuItem { - text: "Connect to Node" - shortcut: "Ctrl+p" - onTriggered: { - addPeerWin.visible = true - } - } - MenuItem { - text: "Show Peers" - shortcut: "Ctrl+e" - onTriggered: { - peerWindow.visible = true - } - } - } - - Menu { - title: "Help" - MenuItem { - text: "About" - onTriggered: { - aboutWin.visible = true - } - } - } - - Menu { - title: "GLOBAL SHORTCUTS" - visible: false - MenuItem { - visible: false - shortcut: "Ctrl+l" - onTriggered: { - url.focus = true - } - } - } - } - - statusBar: StatusBar { - //height: 32 - id: statusBar - Label { - //y: 6 - id: walletValueLabel - - font.pixelSize: 10 - styleColor: "#797979" - } - - Label { - //y: 6 - objectName: "miningLabel" - visible: true - font.pixelSize: 10 - anchors.right: lastBlockLabel.left - anchors.rightMargin: 5 - } - - Label { - //y: 6 - id: lastBlockLabel - objectName: "lastBlockLabel" - visible: true - text: "" - font.pixelSize: 10 - anchors.right: peerGroup.left - anchors.rightMargin: 5 - } - - ProgressBar { - visible: false - id: downloadIndicator - value: 0 - objectName: "downloadIndicator" - y: -4 - x: statusBar.width / 2 - this.width / 2 - width: 160 - } - - Label { - visible: false - objectName: "downloadLabel" - //y: 7 - anchors.left: downloadIndicator.right - anchors.leftMargin: 5 - font.pixelSize: 10 - text: "0 / 0" - } - - - RowLayout { - id: peerGroup - //y: 7 - anchors.right: parent.right - MouseArea { - onDoubleClicked: peerWindow.visible = true - anchors.fill: parent - } - - Label { - id: peerLabel - font.pixelSize: 10 - text: "0 / 0" - } - } - } - - - property var blockModel: ListModel { - id: blockModel - } - - SplitView { - property var views: []; - - id: mainSplit - anchors.fill: parent - resizing: false - - function setView(view, menu) { - for(var i = 0; i < views.length; i++) { - views[i].view.visible = false - views[i].menuItem.setSelection(false) - } - view.visible = true - menu.setSelection(true) - } - - function addComponent(view, options) { - view.visible = false - view.anchors.fill = mainView - - var menuItem = menu.createMenuItem(view, options); - if( view.hasOwnProperty("menuItem") ) { - view.menuItem = menuItem; - } - - if( view.hasOwnProperty("onReady") ) { - view.onReady.call(view) - } - - if( options.active ) { - setView(view, menuItem) - } - - - return {view: view, menuItem: menuItem} - } - - /********************* - * Main menu. - ********************/ - Rectangle { - id: menu - Layout.minimumWidth: 210 - Layout.maximumWidth: 210 - anchors.top: parent.top - color: "#ececec" - - Component { - id: menuItemTemplate - Rectangle { - id: menuItem - property var view; - property var path; - property var closable; - - property alias title: label.text - property alias icon: icon.source - property alias secondaryTitle: secondary.text - function setSelection(on) { - sel.visible = on - } - - width: 206 - height: 28 - color: "#00000000" - - anchors { - left: parent.left - leftMargin: 4 - } - - Rectangle { - id: sel - visible: false - anchors.fill: parent - color: "#00000000" - Rectangle { - id: r - anchors.fill: parent - border.color: "#CCCCCC" - border.width: 1 - radius: 5 - color: "#FFFFFFFF" - } - Rectangle { - anchors { - top: r.top - bottom: r.bottom - right: r.right - } - width: 10 - color: "#FFFFFFFF" - - Rectangle { - anchors { - left: parent.left - right: parent.right - top: parent.top - } - height: 1 - color: "#CCCCCC" - } - - Rectangle { - anchors { - left: parent.left - right: parent.right - bottom: parent.bottom - } - height: 1 - color: "#CCCCCC" - } - } - } - - MouseArea { - anchors.fill: parent - onClicked: { - activeView(view, menuItem); - } - } - - Image { - id: icon - height: 20 - width: 20 - anchors { - left: parent.left - verticalCenter: parent.verticalCenter - leftMargin: 3 - } - MouseArea { - anchors.fill: parent - onClicked: { - menuItem.closeApp() - } - } - } - - Text { - id: label - anchors { - left: icon.right - verticalCenter: parent.verticalCenter - leftMargin: 3 - } - - color: "#0D0A01" - font.pixelSize: 12 - } - - Text { - id: secondary - anchors { - right: parent.right - rightMargin: 8 - verticalCenter: parent.verticalCenter - } - color: "#AEADBE" - font.pixelSize: 12 - } - - - function closeApp() { - if(!this.closable) { return; } - - if(this.view.hasOwnProperty("onDestroy")) { - this.view.onDestroy.call(this.view) - } - - this.view.destroy() - this.destroy() - for (var i = 0; i < mainSplit.views.length; i++) { - var view = mainSplit.views[i]; - if (view.menuItem === this) { - mainSplit.views.splice(i, 1); - break; - } - } - gui.removePlugin(this.path) - activeView(mainSplit.views[0].view, mainSplit.views[0].menuItem); - } - } - } - - function createMenuItem(view, options) { - if(options === undefined) { - options = {}; - } - - var section; - switch(options.section) { - case "ethereum": - section = menuDefault; - break; - case "legacy": - section = menuLegacy; - break; - default: - section = menuApps; - break; - } - - var comp = menuItemTemplate.createObject(section) - comp.view = view - comp.title = view.title - - if(view.hasOwnProperty("iconSource")) { - comp.icon = view.iconSource; - } - comp.closable = options.close; - - return comp - } - - ColumnLayout { - id: menuColumn - y: 10 - width: parent.width - anchors.left: parent.left - anchors.right: parent.right - spacing: 3 - - Text { - text: "ETHEREUM" - font.bold: true - anchors { - left: parent.left - leftMargin: 5 - } - color: "#888888" - } - - ColumnLayout { - id: menuDefault - spacing: 3 - anchors { - left: parent.left - right: parent.right - } - } - - - Text { - text: "NET" - font.bold: true - anchors { - left: parent.left - leftMargin: 5 - } - color: "#888888" - } - - ColumnLayout { - id: menuApps - spacing: 3 - anchors { - left: parent.left - right: parent.right - } - } - - Text { - text: "DEBUG" - font.bold: true - anchors { - left: parent.left - leftMargin: 5 - } - color: "#888888" - } - - ColumnLayout { - id: menuLegacy - spacing: 3 - anchors { - left: parent.left - right: parent.right - } - } - } - } - - /********************* - * Main view - ********************/ - Rectangle { - id: rootView - anchors.right: parent.right - anchors.left: menu.right - anchors.bottom: parent.bottom - anchors.top: parent.top - color: "#00000000" - - Rectangle { - id: urlPane - height: 40 - color: "#00000000" - anchors { - left: parent.left - right: parent.right - leftMargin: 5 - rightMargin: 5 - top: parent.top - topMargin: 5 - } - TextField { - id: url - objectName: "url" - placeholderText: "DApp URL" - anchors { - left: parent.left - right: parent.right - top: parent.top - topMargin: 5 - rightMargin: 5 - leftMargin: 5 - } - - Keys.onReturnPressed: { - if(/^https?/.test(this.text)) { - newBrowserTab(this.text); - } else { - addPlugin(this.text, {close: true, section: "apps"}) - } - } - } - - } - - // Border - Rectangle { - id: divider - anchors { - left: parent.left - right: parent.right - top: urlPane.bottom - } - z: -1 - height: 1 - color: "#CCCCCC" - } - - Rectangle { - id: mainView - color: "#00000000" - anchors.right: parent.right - anchors.left: parent.left - anchors.bottom: parent.bottom - anchors.top: divider.bottom - - function createView(component) { - var view = component.createObject(mainView) - - return view; - } - } - } - } - - - /****************** - * Dialogs - *****************/ - FileDialog { - id: generalFileDialog - property var callback; - onAccepted: { - var path = this.fileUrl.toString(); - callback.call(this, path); - } - - function show(selectExisting, callback) { - generalFileDialog.callback = callback; - generalFileDialog.selectExisting = selectExisting; - - this.open(); - } - } - - - /****************** - * Wallet functions - *****************/ - function importApp(path) { - var ext = path.split('.').pop() - if(ext == "html" || ext == "htm") { - eth.openHtml(path) - }else if(ext == "qml"){ - addPlugin(path, {close: true, section: "apps"}) - } - } - - - function setWalletValue(value) { - walletValueLabel.text = value - } - - function loadPlugin(name) { - console.log("Loading plugin" + name) - var view = mainView.addPlugin(name) - } - - function setPeers(text) { - peerLabel.text = text - } - - function addPeer(peer) { - // We could just append the whole peer object but it cries if you try to alter them - peerModel.append({ip: peer.ip, port: peer.port, lastResponse:timeAgo(peer.lastSend), latency: peer.latency, version: peer.version, caps: peer.caps}) - } - - function resetPeers(){ - peerModel.clear() - } - - function timeAgo(unixTs){ - var lapsed = (Date.now() - new Date(unixTs*1000)) / 1000 - return (lapsed + " seconds ago") - } - - function convertToPretty(unixTs){ - var a = new Date(unixTs*1000); - var months = ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec']; - var year = a.getFullYear(); - var month = months[a.getMonth()]; - var date = a.getDate(); - var hour = a.getHours(); - var min = a.getMinutes(); - var sec = a.getSeconds(); - var time = date+' '+month+' '+year+' '+hour+':'+min+':'+sec ; - return time; - } - - /********************** - * Windows - *********************/ - Window { - id: peerWindow - //flags: Qt.CustomizeWindowHint | Qt.Tool | Qt.WindowCloseButtonHint - height: 200 - width: 700 - Rectangle { - anchors.fill: parent - property var peerModel: ListModel { - id: peerModel - } - TableView { - anchors.fill: parent - id: peerTable - model: peerModel - TableViewColumn{width: 200; role: "ip" ; title: "IP" } - TableViewColumn{width: 260; role: "version" ; title: "Version" } - TableViewColumn{width: 180; role: "caps" ; title: "Capabilities" } - } - } - } - - Window { - id: aboutWin - visible: false - title: "About" - minimumWidth: 350 - maximumWidth: 350 - maximumHeight: 280 - minimumHeight: 280 - - Image { - id: aboutIcon - height: 150 - width: 150 - fillMode: Image.PreserveAspectFit - smooth: true - source: "../facet.png" - x: 10 - y: 30 - } - - Text { - anchors.left: aboutIcon.right - anchors.leftMargin: 10 - anchors.top: parent.top - anchors.topMargin: 30 - font.pointSize: 12 - text: "

Mist (0.7.10)


Development

Jeffrey Wilcke
Viktor Trón
Felix Lange
Taylor Gerring
Daniel Nagy

UX

Alex van de Sande
" - } - } - - Window { - id: txImportDialog - minimumWidth: 270 - maximumWidth: 270 - maximumHeight: 50 - minimumHeight: 50 - TextField { - id: txImportField - width: 170 - anchors.verticalCenter: parent.verticalCenter - anchors.left: parent.left - anchors.leftMargin: 10 - onAccepted: { - } - } - Button { - anchors.left: txImportField.right - anchors.verticalCenter: parent.verticalCenter - anchors.leftMargin: 5 - text: "Import" - onClicked: { - eth.importTx(txImportField.text) - txImportField.visible = false - } - } - Component.onCompleted: { - addrField.focus = true - } - } - - Window { - id: addPeerWin - visible: false - minimumWidth: 400 - maximumWidth: 400 - maximumHeight: 50 - minimumHeight: 50 - title: "Connect to Node" - - TextField { - id: addrField - placeholderText: "enode://::" - anchors.verticalCenter: parent.verticalCenter - anchors.left: parent.left - anchors.right: addPeerButton.left - anchors.leftMargin: 10 - anchors.rightMargin: 10 - onAccepted: { - eth.connectToPeer(addrField.text) - addPeerWin.visible = false - } - } - - Button { - id: addPeerButton - anchors.right: parent.right - anchors.verticalCenter: parent.verticalCenter - anchors.rightMargin: 10 - text: "Connect" - onClicked: { - eth.connectToPeer(addrField.text) - addPeerWin.visible = false - } - } - Component.onCompleted: { - addrField.focus = true - } - } - } ->>>>>>> 32a9c0ca809508c1648b8f44f3e09725af7a80d3 + } \ No newline at end of file diff --git a/core/block_processor.go b/core/block_processor.go index 8f5ee52b7b..c360273da8 100644 --- a/core/block_processor.go +++ b/core/block_processor.go @@ -23,19 +23,6 @@ type PendingBlockEvent struct { var statelogger = logger.NewLogger("BLOCK") -type EthManager interface { - BlockProcessor() *BlockProcessor - ChainManager() *ChainManager - TxPool() *TxPool - PeerCount() int - IsMining() bool - IsListening() bool - Peers() []*p2p.Peer - KeyManager() *crypto.KeyManager - Db() ethutil.Database - EventMux() *event.TypeMux -} - type BlockProcessor struct { db ethutil.Database // Mutex for locking the block processor. Blocks can only be handled one at a time diff --git a/core/manager.go b/core/manager.go index 4671573b16..f960fc5f01 100644 --- a/core/manager.go +++ b/core/manager.go @@ -16,7 +16,6 @@ type EthManager interface { IsListening() bool Peers() []*p2p.Peer KeyManager() *crypto.KeyManager - ClientIdentity() p2p.ClientIdentity Db() ethutil.Database EventMux() *event.TypeMux } diff --git a/eth/backend.go b/eth/backend.go index 684f151363..28a0650666 100644 --- a/eth/backend.go +++ b/eth/backend.go @@ -20,14 +20,16 @@ import ( ) var logger = ethlogger.NewLogger("SERV") +var jsonlogger = ethlogger.NewJsonLogger() type Config struct { - Name string - KeyStore string - DataDir string - LogFile string - LogLevel int - KeyRing string + Name string + KeyStore string + DataDir string + LogFile string + LogLevel int + KeyRing string + LogFormat string MaxPeers int Port string @@ -47,9 +49,6 @@ type Config struct { KeyManager *crypto.KeyManager } -var logger = ethlogger.NewLogger("SERV") -var jsonlogger = ethlogger.NewJsonLogger() - func (cfg *Config) parseBootNodes() []*discover.Node { var ns []*discover.Node for _, url := range strings.Split(cfg.BootNodes, " ") { @@ -240,10 +239,10 @@ func (s *Ethereum) Coinbase() []byte { // Start the ethereum func (s *Ethereum) Start() error { jsonlogger.LogJson(ðlogger.LogStarting{ - ClientString: s.ClientIdentity().String(), + ClientString: s.net.Name, Coinbase: ethutil.Bytes2Hex(s.KeyManager().Address()), ProtocolVersion: ProtocolVersion, - LogEvent: ethlogger.LogEvent{Guid: ethutil.Bytes2Hex(s.ClientIdentity().Pubkey())}, + LogEvent: ethlogger.LogEvent{Guid: ethutil.Bytes2Hex(crypto.FromECDSAPub(&s.net.PrivateKey.PublicKey))}, }) err := s.net.Start()