mirror of https://github.com/ethereum/go-ethereum
cmd/wnode, whisper: add whisper CLI tool and mail server (#3580)
gluk256
8 years ago
committed by
Felix Lange
parent
1c140f7382
commit
690f6ea1d7
@ -0,0 +1,537 @@ |
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// Copyright 2016 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// go-ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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// This is a simple Whisper node. It could be used as a stand-alone bootstrap node.
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// Also, could be used for different test and diagnostics purposes.
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package main |
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import ( |
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"bufio" |
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"crypto/ecdsa" |
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"crypto/sha1" |
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"crypto/sha256" |
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"crypto/sha512" |
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"encoding/binary" |
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"encoding/hex" |
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"flag" |
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"fmt" |
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"os" |
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"strconv" |
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"strings" |
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"time" |
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"github.com/ethereum/go-ethereum/cmd/utils" |
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"github.com/ethereum/go-ethereum/common" |
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"github.com/ethereum/go-ethereum/console" |
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"github.com/ethereum/go-ethereum/crypto" |
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"github.com/ethereum/go-ethereum/logger" |
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"github.com/ethereum/go-ethereum/logger/glog" |
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"github.com/ethereum/go-ethereum/p2p" |
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"github.com/ethereum/go-ethereum/p2p/discover" |
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"github.com/ethereum/go-ethereum/p2p/nat" |
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"github.com/ethereum/go-ethereum/whisper/mailserver" |
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whisper "github.com/ethereum/go-ethereum/whisper/whisperv5" |
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"golang.org/x/crypto/pbkdf2" |
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) |
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const quitCommand = "~Q" |
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// singletons
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var ( |
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server *p2p.Server |
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shh *whisper.Whisper |
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done chan struct{} |
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mailServer mailserver.WMailServer |
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input = bufio.NewReader(os.Stdin) |
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) |
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// encryption
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var ( |
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symKey []byte |
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pub *ecdsa.PublicKey |
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asymKey *ecdsa.PrivateKey |
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nodeid *ecdsa.PrivateKey |
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topic whisper.TopicType |
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filterID uint32 |
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msPassword string |
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) |
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// cmd arguments
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var ( |
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echoMode = flag.Bool("e", false, "echo mode: prints some arguments for diagnostics") |
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bootstrapMode = flag.Bool("b", false, "boostrap node: don't actively connect to peers, wait for incoming connections") |
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forwarderMode = flag.Bool("f", false, "forwarder mode: only forward messages, neither send nor decrypt messages") |
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mailServerMode = flag.Bool("s", false, "mail server mode: delivers expired messages on demand") |
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requestMail = flag.Bool("r", false, "request expired messages from the bootstrap server") |
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asymmetricMode = flag.Bool("a", false, "use asymmetric encryption") |
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testMode = flag.Bool("t", false, "use of predefined parameters for diagnostics") |
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generateKey = flag.Bool("k", false, "generate and show the private key") |
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argTTL = flag.Uint("ttl", 30, "time-to-live for messages in seconds") |
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argWorkTime = flag.Uint("work", 5, "work time in seconds") |
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argPoW = flag.Float64("pow", whisper.MinimumPoW, "PoW for normal messages in float format (e.g. 2.7)") |
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argServerPoW = flag.Float64("mspow", whisper.MinimumPoW, "PoW requirement for Mail Server request") |
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argIP = flag.String("ip", "", "IP address and port of this node (e.g. 127.0.0.1:30303)") |
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argSalt = flag.String("salt", "", "salt (for topic and key derivation)") |
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argPub = flag.String("pub", "", "public key for asymmetric encryption") |
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argDBPath = flag.String("dbpath", "", "path to the server's DB directory") |
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argIDFile = flag.String("idfile", "", "file name with node id (private key)") |
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argEnode = flag.String("boot", "", "bootstrap node you want to connect to (e.g. enode://e454......08d50@52.176.211.200:16428)") |
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argTopic = flag.String("topic", "", "topic in hexadecimal format (e.g. 70a4beef)") |
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) |
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func main() { |
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processArgs() |
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initialize() |
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run() |
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} |
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func processArgs() { |
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flag.Parse() |
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if len(*argIDFile) > 0 { |
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var err error |
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nodeid, err = crypto.LoadECDSA(*argIDFile) |
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if err != nil { |
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utils.Fatalf("Failed to load file [%s]: %s.", *argIDFile, err) |
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} |
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} |
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const enodePrefix = "enode://" |
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if len(*argEnode) > 0 { |
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if (*argEnode)[:len(enodePrefix)] != enodePrefix { |
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*argEnode = enodePrefix + *argEnode |
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} |
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} |
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if len(*argTopic) > 0 { |
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x, err := hex.DecodeString(*argTopic) |
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if err != nil { |
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utils.Fatalf("Failed to parse the topic: %s", err) |
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} |
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topic = whisper.BytesToTopic(x) |
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} |
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if *asymmetricMode && len(*argPub) > 0 { |
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pub = crypto.ToECDSAPub(common.FromHex(*argPub)) |
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if !isKeyValid(pub) { |
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utils.Fatalf("invalid public key") |
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} |
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} |
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if *echoMode { |
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echo() |
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} |
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} |
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func echo() { |
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fmt.Printf("ttl = %d \n", *argTTL) |
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fmt.Printf("workTime = %d \n", *argWorkTime) |
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fmt.Printf("pow = %f \n", *argPoW) |
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fmt.Printf("mspow = %f \n", *argServerPoW) |
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fmt.Printf("ip = %s \n", *argIP) |
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fmt.Printf("salt = %s \n", *argSalt) |
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fmt.Printf("pub = %s \n", common.ToHex(crypto.FromECDSAPub(pub))) |
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fmt.Printf("idfile = %s \n", *argIDFile) |
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fmt.Printf("dbpath = %s \n", *argDBPath) |
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fmt.Printf("boot = %s \n", *argEnode) |
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} |
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func initialize() { |
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glog.SetV(logger.Warn) |
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glog.SetToStderr(true) |
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done = make(chan struct{}) |
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var peers []*discover.Node |
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var err error |
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if *generateKey { |
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key, err := crypto.GenerateKey() |
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if err != nil { |
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utils.Fatalf("Failed to generate private key: %s", err) |
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} |
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k := hex.EncodeToString(crypto.FromECDSA(key)) |
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fmt.Printf("Random private key: %s \n", k) |
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os.Exit(0) |
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} |
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if *testMode { |
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password := []byte("test password for symmetric encryption") |
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salt := []byte("test salt for symmetric encryption") |
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symKey = pbkdf2.Key(password, salt, 64, 32, sha256.New) |
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topic = whisper.TopicType{0xFF, 0xFF, 0xFF, 0xFF} |
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msPassword = "mail server test password" |
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} |
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if *bootstrapMode { |
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if len(*argIP) == 0 { |
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argIP = scanLineA("Please enter your IP and port (e.g. 127.0.0.1:30348): ") |
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} |
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} else { |
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if len(*argEnode) == 0 { |
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argEnode = scanLineA("Please enter the peer's enode: ") |
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} |
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peer := discover.MustParseNode(*argEnode) |
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peers = append(peers, peer) |
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} |
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if *mailServerMode { |
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if len(msPassword) == 0 { |
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msPassword, err = console.Stdin.PromptPassword("Please enter the Mail Server password: ") |
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if err != nil { |
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utils.Fatalf("Failed to read Mail Server password: %s", err) |
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} |
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} |
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shh = whisper.NewWhisper(&mailServer) |
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mailServer.Init(shh, *argDBPath, msPassword, *argServerPoW) |
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} else { |
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shh = whisper.NewWhisper(nil) |
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} |
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asymKey = shh.NewIdentity() |
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if nodeid == nil { |
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nodeid = shh.NewIdentity() |
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} |
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server = &p2p.Server{ |
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Config: p2p.Config{ |
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PrivateKey: nodeid, |
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MaxPeers: 128, |
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Name: common.MakeName("whisper-go", "5.0"), |
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Protocols: shh.Protocols(), |
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ListenAddr: *argIP, |
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NAT: nat.Any(), |
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BootstrapNodes: peers, |
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StaticNodes: peers, |
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TrustedNodes: peers, |
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}, |
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} |
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} |
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func startServer() { |
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err := server.Start() |
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if err != nil { |
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utils.Fatalf("Failed to start Whisper peer: %s.", err) |
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} |
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fmt.Printf("my public key: %s \n", common.ToHex(crypto.FromECDSAPub(&asymKey.PublicKey))) |
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fmt.Println(server.NodeInfo().Enode) |
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if *bootstrapMode { |
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configureNode() |
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fmt.Println("Bootstrap Whisper node started") |
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} else { |
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fmt.Println("Whisper node started") |
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// first see if we can establish connection, then ask for user input
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waitForConnection(true) |
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configureNode() |
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} |
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if !*forwarderMode { |
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fmt.Printf("Please type the message. To quit type: '%s'\n", quitCommand) |
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} |
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} |
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func isKeyValid(k *ecdsa.PublicKey) bool { |
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return k.X != nil && k.Y != nil |
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} |
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func configureNode() { |
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var err error |
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var p2pAccept bool |
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if *forwarderMode { |
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return |
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} |
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if *asymmetricMode { |
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if len(*argPub) == 0 { |
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s := scanLine("Please enter the peer's public key: ") |
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pub = crypto.ToECDSAPub(common.FromHex(s)) |
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if !isKeyValid(pub) { |
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utils.Fatalf("Error: invalid public key") |
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} |
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} |
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} |
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if *requestMail { |
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p2pAccept = true |
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if len(msPassword) == 0 { |
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msPassword, err = console.Stdin.PromptPassword("Please enter the Mail Server password: ") |
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if err != nil { |
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utils.Fatalf("Failed to read Mail Server password: %s", err) |
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} |
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} |
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} |
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if !*asymmetricMode && !*forwarderMode && !*testMode { |
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pass, err := console.Stdin.PromptPassword("Please enter the password: ") |
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if err != nil { |
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utils.Fatalf("Failed to read passphrase: %v", err) |
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} |
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if len(*argSalt) == 0 { |
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argSalt = scanLineA("Please enter the salt: ") |
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} |
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symKey = pbkdf2.Key([]byte(pass), []byte(*argSalt), 65356, 32, sha256.New) |
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if len(*argTopic) == 0 { |
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generateTopic([]byte(pass), []byte(*argSalt)) |
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} |
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} |
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if *mailServerMode { |
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if len(*argDBPath) == 0 { |
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argDBPath = scanLineA("Please enter the path to DB file: ") |
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} |
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} |
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filter := whisper.Filter{ |
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KeySym: symKey, |
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KeyAsym: asymKey, |
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Topics: []whisper.TopicType{topic}, |
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AcceptP2P: p2pAccept, |
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} |
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filterID = shh.Watch(&filter) |
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fmt.Printf("Filter is configured for the topic: %x \n", topic) |
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} |
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func generateTopic(password, salt []byte) { |
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const rounds = 4000 |
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const size = 128 |
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x1 := pbkdf2.Key(password, salt, rounds, size, sha512.New) |
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x2 := pbkdf2.Key(password, salt, rounds, size, sha1.New) |
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x3 := pbkdf2.Key(x1, x2, rounds, size, sha256.New) |
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for i := 0; i < size; i++ { |
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topic[i%whisper.TopicLength] ^= x3[i] |
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} |
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} |
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func waitForConnection(timeout bool) { |
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var cnt int |
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var connected bool |
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for !connected { |
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time.Sleep(time.Millisecond * 50) |
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connected = server.PeerCount() > 0 |
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if timeout { |
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cnt++ |
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if cnt > 1000 { |
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utils.Fatalf("Timeout expired, failed to connect") |
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} |
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} |
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} |
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fmt.Println("Connected to peer.") |
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} |
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func run() { |
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defer mailServer.Close() |
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startServer() |
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defer server.Stop() |
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shh.Start(nil) |
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defer shh.Stop() |
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if !*forwarderMode { |
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go messageLoop() |
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} |
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if *requestMail { |
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requestExpiredMessagesLoop() |
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} else { |
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sendLoop() |
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} |
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} |
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func sendLoop() { |
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for { |
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s := scanLine("") |
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if s == quitCommand { |
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fmt.Println("Quit command received") |
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close(done) |
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break |
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} |
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sendMsg([]byte(s)) |
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if *asymmetricMode { |
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// print your own message for convenience,
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// because in asymmetric mode it is impossible to decrypt it
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hour, min, sec := time.Now().Clock() |
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from := crypto.PubkeyToAddress(asymKey.PublicKey) |
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fmt.Printf("\n%02d:%02d:%02d <%x>: %s\n", hour, min, sec, from, s) |
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} |
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} |
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} |
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func scanLine(prompt string) string { |
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if len(prompt) > 0 { |
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fmt.Print(prompt) |
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} |
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txt, err := input.ReadString('\n') |
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if err != nil { |
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utils.Fatalf("input error: %s", err) |
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} |
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txt = strings.TrimRight(txt, "\n\r") |
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return txt |
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} |
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func scanLineA(prompt string) *string { |
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s := scanLine(prompt) |
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return &s |
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} |
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func scanUint(prompt string) uint32 { |
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s := scanLine(prompt) |
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i, err := strconv.Atoi(s) |
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if err != nil { |
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utils.Fatalf("Fail to parse the lower time limit: %s", err) |
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} |
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return uint32(i) |
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} |
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func sendMsg(payload []byte) { |
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params := whisper.MessageParams{ |
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Src: asymKey, |
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Dst: pub, |
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KeySym: symKey, |
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Payload: payload, |
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Topic: topic, |
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TTL: uint32(*argTTL), |
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PoW: *argPoW, |
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WorkTime: uint32(*argWorkTime), |
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} |
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msg := whisper.NewSentMessage(¶ms) |
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envelope, err := msg.Wrap(¶ms) |
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if err != nil { |
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fmt.Printf("failed to seal message: %v \n", err) |
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return |
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} |
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err = shh.Send(envelope) |
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if err != nil { |
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fmt.Printf("failed to send message: %v \n", err) |
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} |
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} |
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func messageLoop() { |
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f := shh.GetFilter(filterID) |
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if f == nil { |
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utils.Fatalf("filter is not installed") |
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} |
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ticker := time.NewTicker(time.Millisecond * 50) |
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for { |
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select { |
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case <-ticker.C: |
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messages := f.Retrieve() |
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for _, msg := range messages { |
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printMessageInfo(msg) |
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} |
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case <-done: |
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return |
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} |
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} |
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} |
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func printMessageInfo(msg *whisper.ReceivedMessage) { |
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timestamp := fmt.Sprintf("%d", msg.Sent) // unix timestamp for diagnostics
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text := string(msg.Payload) |
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var address common.Address |
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if msg.Src != nil { |
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address = crypto.PubkeyToAddress(*msg.Src) |
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} |
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if whisper.IsPubKeyEqual(msg.Src, &asymKey.PublicKey) { |
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fmt.Printf("\n%s <%x>: %s\n", timestamp, address, text) // message from myself
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} else { |
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fmt.Printf("\n%s [%x]: %s\n", timestamp, address, text) // message from a peer
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} |
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} |
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func requestExpiredMessagesLoop() { |
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var key, peerID []byte |
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var timeLow, timeUpp uint32 |
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var t string |
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var xt, empty whisper.TopicType |
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err := shh.AddSymKey(mailserver.MailServerKeyName, []byte(msPassword)) |
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if err != nil { |
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utils.Fatalf("Failed to create symmetric key for mail request: %s", err) |
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} |
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key = shh.GetSymKey(mailserver.MailServerKeyName) |
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peerID = extractIdFromEnode(*argEnode) |
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shh.MarkPeerTrusted(peerID) |
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for { |
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timeLow = scanUint("Please enter the lower limit of the time range (unix timestamp): ") |
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timeUpp = scanUint("Please enter the upper limit of the time range (unix timestamp): ") |
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t = scanLine("Please enter the topic (hexadecimal): ") |
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if len(t) >= whisper.TopicLength*2 { |
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x, err := hex.DecodeString(t) |
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if err != nil { |
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utils.Fatalf("Failed to parse the topic: %s", err) |
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} |
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xt = whisper.BytesToTopic(x) |
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} |
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if timeUpp == 0 { |
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timeUpp = 0xFFFFFFFF |
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} |
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data := make([]byte, 8+whisper.TopicLength) |
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binary.BigEndian.PutUint32(data, timeLow) |
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binary.BigEndian.PutUint32(data[4:], timeUpp) |
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copy(data[8:], xt[:]) |
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if xt == empty { |
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data = data[:8] |
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} |
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var params whisper.MessageParams |
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params.PoW = *argServerPoW |
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params.Payload = data |
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params.KeySym = key |
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params.Src = nodeid |
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params.WorkTime = 5 |
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msg := whisper.NewSentMessage(¶ms) |
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env, err := msg.Wrap(¶ms) |
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if err != nil { |
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utils.Fatalf("Wrap failed: %s", err) |
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} |
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err = shh.RequestHistoricMessages(peerID, env) |
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if err != nil { |
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utils.Fatalf("Failed to send P2P message: %s", err) |
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} |
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time.Sleep(time.Second * 5) |
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} |
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} |
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func extractIdFromEnode(s string) []byte { |
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n, err := discover.ParseNode(s) |
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if err != nil { |
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utils.Fatalf("Failed to parse enode: %s", err) |
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return nil |
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} |
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return n.ID[:] |
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} |
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@ -0,0 +1,170 @@ |
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// Copyright 2016 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// 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
|
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// (at your option) any later version.
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//
|
||||
// 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 <http://www.gnu.org/licenses/>.
|
||||
|
||||
package mailserver |
||||
|
||||
import ( |
||||
"bytes" |
||||
"encoding/binary" |
||||
|
||||
"github.com/ethereum/go-ethereum/cmd/utils" |
||||
"github.com/ethereum/go-ethereum/common" |
||||
"github.com/ethereum/go-ethereum/logger" |
||||
"github.com/ethereum/go-ethereum/logger/glog" |
||||
"github.com/ethereum/go-ethereum/rlp" |
||||
whisper "github.com/ethereum/go-ethereum/whisper/whisperv5" |
||||
"github.com/syndtr/goleveldb/leveldb" |
||||
"github.com/syndtr/goleveldb/leveldb/util" |
||||
) |
||||
|
||||
const MailServerKeyName = "958e04ab302fb36ad2616a352cbac79d" |
||||
|
||||
type WMailServer struct { |
||||
db *leveldb.DB |
||||
w *whisper.Whisper |
||||
pow float64 |
||||
key []byte |
||||
} |
||||
|
||||
type DBKey struct { |
||||
timestamp uint32 |
||||
hash common.Hash |
||||
raw []byte |
||||
} |
||||
|
||||
func NewDbKey(t uint32, h common.Hash) *DBKey { |
||||
const sz = common.HashLength + 4 |
||||
var k DBKey |
||||
k.timestamp = t |
||||
k.hash = h |
||||
k.raw = make([]byte, sz) |
||||
binary.BigEndian.PutUint32(k.raw, k.timestamp) |
||||
copy(k.raw[4:], k.hash[:]) |
||||
return &k |
||||
} |
||||
|
||||
func (s *WMailServer) Init(shh *whisper.Whisper, path string, password string, pow float64) { |
||||
var err error |
||||
if len(path) == 0 { |
||||
utils.Fatalf("DB file is not specified") |
||||
} |
||||
|
||||
if len(password) == 0 { |
||||
utils.Fatalf("Password is not specified for MailServer") |
||||
} |
||||
|
||||
s.db, err = leveldb.OpenFile(path, nil) |
||||
if err != nil { |
||||
utils.Fatalf("Failed to open DB file: %s", err) |
||||
} |
||||
|
||||
s.w = shh |
||||
s.pow = pow |
||||
|
||||
err = s.w.AddSymKey(MailServerKeyName, []byte(password)) |
||||
if err != nil { |
||||
utils.Fatalf("Failed to create symmetric key for MailServer: %s", err) |
||||
} |
||||
s.key = s.w.GetSymKey(MailServerKeyName) |
||||
} |
||||
|
||||
func (s *WMailServer) Close() { |
||||
if s.db != nil { |
||||
s.db.Close() |
||||
} |
||||
} |
||||
|
||||
func (s *WMailServer) Archive(env *whisper.Envelope) { |
||||
key := NewDbKey(env.Expiry-env.TTL, env.Hash()) |
||||
rawEnvelope, err := rlp.EncodeToBytes(env) |
||||
if err != nil { |
||||
glog.V(logger.Error).Infof("rlp.EncodeToBytes failed: %s", err) |
||||
} else { |
||||
err = s.db.Put(key.raw, rawEnvelope, nil) |
||||
if err != nil { |
||||
glog.V(logger.Error).Infof("Writing to DB failed: %s", err) |
||||
} |
||||
} |
||||
} |
||||
|
||||
func (s *WMailServer) DeliverMail(peer *whisper.Peer, request *whisper.Envelope) { |
||||
ok, lower, upper, topic := s.validate(peer, request) |
||||
if !ok { |
||||
return |
||||
} |
||||
|
||||
var err error |
||||
var zero common.Hash |
||||
var empty whisper.TopicType |
||||
kl := NewDbKey(lower, zero) |
||||
ku := NewDbKey(upper, zero) |
||||
i := s.db.NewIterator(&util.Range{Start: kl.raw, Limit: ku.raw}, nil) |
||||
defer i.Release() |
||||
|
||||
for i.Next() { |
||||
var envelope whisper.Envelope |
||||
err = rlp.DecodeBytes(i.Value(), &envelope) |
||||
if err != nil { |
||||
glog.V(logger.Error).Infof("RLP decoding failed: %s", err) |
||||
} |
||||
|
||||
if topic == empty || envelope.Topic == topic { |
||||
err = s.w.SendP2PDirect(peer, &envelope) |
||||
if err != nil { |
||||
glog.V(logger.Error).Infof("Failed to send direct message to peer: %s", err) |
||||
return |
||||
} |
||||
} |
||||
} |
||||
|
||||
err = i.Error() |
||||
if err != nil { |
||||
glog.V(logger.Error).Infof("Level DB iterator error: %s", err) |
||||
} |
||||
} |
||||
|
||||
func (s *WMailServer) validate(peer *whisper.Peer, request *whisper.Envelope) (bool, uint32, uint32, whisper.TopicType) { |
||||
var topic whisper.TopicType |
||||
if s.pow > 0.0 && request.PoW() < s.pow { |
||||
return false, 0, 0, topic |
||||
} |
||||
|
||||
f := whisper.Filter{KeySym: s.key} |
||||
decrypted := request.Open(&f) |
||||
if decrypted == nil { |
||||
glog.V(logger.Warn).Infof("Failed to decrypt p2p request") |
||||
return false, 0, 0, topic |
||||
} |
||||
|
||||
if len(decrypted.Payload) < 8 { |
||||
glog.V(logger.Warn).Infof("Undersized p2p request") |
||||
return false, 0, 0, topic |
||||
} |
||||
|
||||
if bytes.Equal(peer.ID(), decrypted.Signature) { |
||||
glog.V(logger.Warn).Infof("Wrong signature of p2p request") |
||||
return false, 0, 0, topic |
||||
} |
||||
|
||||
lower := binary.BigEndian.Uint32(decrypted.Payload[:4]) |
||||
upper := binary.BigEndian.Uint32(decrypted.Payload[4:8]) |
||||
|
||||
if len(decrypted.Payload) >= 8+whisper.TopicLength { |
||||
topic = whisper.BytesToTopic(decrypted.Payload[8:]) |
||||
} |
||||
|
||||
return true, lower, upper, topic |
||||
} |
||||
Loading…
Reference in new issue