mirror of https://github.com/ethereum/go-ethereum
Péter Szilágyi
8 years ago
parent
52bd4e29ff
commit
ac2a0e615b
@ -0,0 +1,648 @@ |
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// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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// The go-ethereum library 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// This file contains the implementation for interacting with the Ledger hardware
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// wallets. The wire protocol spec can be found in the Ledger Blue GitHub repo:
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// https://raw.githubusercontent.com/LedgerHQ/blue-app-eth/master/doc/ethapp.asc
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package usbwallet |
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import ( |
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"encoding/binary" |
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"encoding/hex" |
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"errors" |
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"fmt" |
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"io" |
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"math/big" |
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"strconv" |
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"strings" |
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"sync" |
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"time" |
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"github.com/ethereum/go-ethereum/accounts" |
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"github.com/ethereum/go-ethereum/common" |
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"github.com/ethereum/go-ethereum/core/types" |
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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/rlp" |
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"github.com/karalabe/gousb/usb" |
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) |
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// ledgerDeviceIDs are the known device IDs that Ledger wallets use.
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var ledgerDeviceIDs = []deviceID{ |
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{Vendor: 0x2c97, Product: 0x0000}, // Ledger Blue
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{Vendor: 0x2c97, Product: 0x0001}, // Ledger Nano S
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} |
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// ledgerDerivationPath is the key derivation parameters used by the wallet.
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var ledgerDerivationPath = [4]uint32{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0} |
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// ledgerOpcode is an enumeration encoding the supported Ledger opcodes.
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type ledgerOpcode byte |
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// ledgerParam1 is an enumeration encoding the supported Ledger parameters for
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// specific opcodes. The same parameter values may be reused between opcodes.
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type ledgerParam1 byte |
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// ledgerParam2 is an enumeration encoding the supported Ledger parameters for
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// specific opcodes. The same parameter values may be reused between opcodes.
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type ledgerParam2 byte |
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const ( |
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ledgerOpRetrieveAddress ledgerOpcode = 0x02 // Returns the public key and Ethereum address for a given BIP 32 path
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ledgerOpSignTransaction ledgerOpcode = 0x04 // Signs an Ethereum transaction after having the user validate the parameters
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ledgerOpGetConfiguration ledgerOpcode = 0x06 // Returns specific wallet application configuration
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ledgerP1DirectlyFetchAddress ledgerParam1 = 0x00 // Return address directly from the wallet
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ledgerP1ConfirmFetchAddress ledgerParam1 = 0x01 // Require a user confirmation before returning the address
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ledgerP1InitTransactionData ledgerParam1 = 0x00 // First transaction data block for signing
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ledgerP1ContTransactionData ledgerParam1 = 0x80 // Subsequent transaction data block for signing
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ledgerP2DiscardAddressChainCode ledgerParam2 = 0x00 // Do not return the chain code along with the address
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ledgerP2ReturnAddressChainCode ledgerParam2 = 0x01 // Require a user confirmation before returning the address
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) |
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// ledgerWallet represents a live USB Ledger hardware wallet.
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type ledgerWallet struct { |
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device *usb.Device // USB device advertising itself as a Ledger wallet
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input usb.Endpoint // Input endpoint to send data to this device
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output usb.Endpoint // Output endpoint to receive data from this device
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address common.Address // Current address of the wallet (may be zero if Ethereum app offline)
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url string // Textual URL uniquely identifying this wallet
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version [3]byte // Current version of the Ledger Ethereum app (zero if app is offline)
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} |
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// LedgerHub is a USB hardware wallet interface that can find and handle Ledger
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// wallets.
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type LedgerHub struct { |
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ctx *usb.Context // Context interfacing with a libusb instance
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wallets map[uint16]*ledgerWallet // Apparent Ledger wallets (some may be inactive)
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accounts []accounts.Account // List of active Ledger accounts
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index map[common.Address]uint16 // Set of addresses with active wallets
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quit chan chan error |
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lock sync.RWMutex |
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} |
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// NewLedgerHub creates a new hardware wallet manager for Ledger devices.
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func NewLedgerHub() (*LedgerHub, error) { |
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// Initialize the USB library to access Ledgers through
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ctx, err := usb.NewContext() |
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if err != nil { |
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return nil, err |
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} |
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// Create the USB hub, start and return it
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hub := &LedgerHub{ |
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ctx: ctx, |
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wallets: make(map[uint16]*ledgerWallet), |
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index: make(map[common.Address]uint16), |
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quit: make(chan chan error), |
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} |
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go hub.watch() |
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return hub, nil |
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} |
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// Accounts retrieves the live of accounts currently known by the Ledger hub.
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func (hub *LedgerHub) Accounts() []accounts.Account { |
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hub.lock.RLock() |
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defer hub.lock.RUnlock() |
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cpy := make([]accounts.Account, len(hub.accounts)) |
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copy(cpy, hub.accounts) |
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return cpy |
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} |
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// HasAddress reports whether an account with the given address is present.
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func (hub *LedgerHub) HasAddress(addr common.Address) bool { |
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hub.lock.RLock() |
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defer hub.lock.RUnlock() |
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_, known := hub.index[addr] |
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return known |
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} |
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// SignHash is not supported for Ledger wallets, so this method will always
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// return an error.
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func (hub *LedgerHub) SignHash(acc accounts.Account, hash []byte) ([]byte, error) { |
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return nil, accounts.ErrNotSupported |
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} |
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// SignTx sends the transaction over to the Ledger wallet to request a confirmation
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// from the user. It returns either the signed transaction or a failure if the user
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// denied the transaction.
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//
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// Note, if the version of the Ethereum application running on the Ledger wallet is
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// too old to sign EIP-155 transactions, but such is requested nonetheless, an error
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// will be returned opposed to silently signing in Homestead mode.
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func (hub *LedgerHub) SignTx(acc accounts.Account, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) { |
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hub.lock.RLock() |
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defer hub.lock.RUnlock() |
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// If the account contains the device URL, flatten it to make sure
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var id uint16 |
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if acc.URL != "" { |
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if parts := strings.Split(acc.URL, "."); len(parts) == 2 { |
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bus, busErr := strconv.Atoi(parts[0]) |
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addr, addrErr := strconv.Atoi(parts[1]) |
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if busErr == nil && addrErr == nil { |
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id = uint16(bus)<<8 + uint16(addr) |
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} |
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} |
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} |
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// If the id is still zero, URL is either missing or bad, resolve
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if id == 0 { |
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var ok bool |
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if id, ok = hub.index[acc.Address]; !ok { |
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return nil, accounts.ErrUnknownAccount |
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} |
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} |
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// Retrieve the wallet associated with the URL
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wallet, ok := hub.wallets[id] |
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if !ok { |
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return nil, accounts.ErrUnknownAccount |
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} |
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// Ensure the wallet is capable of signing the given transaction
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if chainID != nil && wallet.version[0] <= 1 && wallet.version[1] <= 0 && wallet.version[2] <= 2 { |
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return nil, fmt.Errorf("Ledger v%d.%d.%d doesn't support signing this transaction, please update to v1.0.3 at least", |
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wallet.version[0], wallet.version[1], wallet.version[2]) |
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} |
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return wallet.sign(tx, chainID) |
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} |
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// SignHashWithPassphrase is not supported for Ledger wallets, so this method
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// will always return an error.
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func (hub *LedgerHub) SignHashWithPassphrase(acc accounts.Account, passphrase string, hash []byte) ([]byte, error) { |
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return nil, accounts.ErrNotSupported |
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} |
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// SignTxWithPassphrase requests the backend to sign the given transaction, with the
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// given passphrase as extra authentication information. Since the Ledger does not
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// support this feature, it will just silently ignore the passphrase.
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func (hub *LedgerHub) SignTxWithPassphrase(acc accounts.Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) { |
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return hub.SignTx(acc, tx, chainID) |
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} |
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// Close terminates the usb watching for Ledger wallets and returns when it
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// successfully terminated.
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func (hub *LedgerHub) Close() error { |
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// Terminate the USB scanner
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errc := make(chan error) |
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hub.quit <- errc |
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err := <-errc |
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// Release the USB interface and return
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hub.ctx.Close() |
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return err |
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} |
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// watch starts watching the local machine's USB ports for the connection or
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// disconnection of Ledger devices.
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func (hub *LedgerHub) watch() { |
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for { |
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// Rescan the USB ports for devices newly added or removed
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hub.rescan() |
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// Sleep for a certain amount of time or until terminated
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select { |
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case errc := <-hub.quit: |
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errc <- nil |
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return |
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case <-time.After(time.Second): |
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} |
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} |
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} |
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// rescan searches the USB ports for attached Ledger hardware wallets.
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func (hub *LedgerHub) rescan() { |
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hub.lock.Lock() |
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defer hub.lock.Unlock() |
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// Iterate over all attached devices and fetch those seemingly Ledger
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present := make(map[uint16]bool) |
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devices, _ := hub.ctx.ListDevices(func(desc *usb.Descriptor) bool { |
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// Discard all devices not advertizing as Ledger
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ledger := false |
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for _, id := range ledgerDeviceIDs { |
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if desc.Vendor == id.Vendor && desc.Product == id.Product { |
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ledger = true |
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} |
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} |
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if !ledger { |
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return false |
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} |
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// If we have a Ledger, mark as still present, or open as new
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id := uint16(desc.Bus)<<8 + uint16(desc.Address) |
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if _, known := hub.wallets[id]; known { |
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// Track it's presence, but don't open again
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present[id] = true |
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return false |
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} |
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// New Ledger device, open it for communication
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return true |
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}) |
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// Drop any tracker wallet which disconnected
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for id, wallet := range hub.wallets { |
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if !present[id] { |
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if wallet.address == (common.Address{}) { |
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glog.V(logger.Info).Infof("ledger wallet [%03d.%03d] disconnected", wallet.device.Bus, wallet.device.Address) |
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} else { |
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// A live account disconnected, remove it from the tracked accounts
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for i, account := range hub.accounts { |
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if account.Address == wallet.address && account.URL == wallet.url { |
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hub.accounts = append(hub.accounts[:i], hub.accounts[i+1:]...) |
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break |
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} |
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} |
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delete(hub.index, wallet.address) |
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glog.V(logger.Info).Infof("ledger wallet [%03d.%03d] v%d.%d.%d disconnected: %s", wallet.device.Bus, wallet.device.Address, |
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wallet.version[0], wallet.version[1], wallet.version[2], wallet.address.Hex()) |
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} |
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delete(hub.wallets, id) |
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wallet.device.Close() |
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} |
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} |
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// Start tracking all wallets which newly appeared
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var err error |
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for _, device := range devices { |
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// Make sure the alleged device has the correct IO endpoints
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wallet := &ledgerWallet{ |
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device: device, |
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url: fmt.Sprintf("%03d.%03d", device.Bus, device.Address), |
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} |
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var invalid string |
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switch { |
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case len(device.Descriptor.Configs) == 0: |
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invalid = "no endpoint config available" |
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case len(device.Descriptor.Configs[0].Interfaces) == 0: |
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invalid = "no endpoint interface available" |
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case len(device.Descriptor.Configs[0].Interfaces[0].Setups) == 0: |
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invalid = "no endpoint setup available" |
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case len(device.Descriptor.Configs[0].Interfaces[0].Setups[0].Endpoints) < 2: |
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invalid = "not enough IO endpoints available" |
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} |
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if invalid != "" { |
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glog.V(logger.Debug).Infof("ledger wallet [%s] deemed invalid: %s", wallet.url, invalid) |
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device.Close() |
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continue |
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} |
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// Open the input and output endpoints to the device
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wallet.input, err = device.OpenEndpoint( |
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device.Descriptor.Configs[0].Config, |
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device.Descriptor.Configs[0].Interfaces[0].Number, |
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device.Descriptor.Configs[0].Interfaces[0].Setups[0].Number, |
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device.Descriptor.Configs[0].Interfaces[0].Setups[0].Endpoints[1].Address, |
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) |
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if err != nil { |
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glog.V(logger.Debug).Infof("ledger wallet [%s] input open failed: %v", wallet.url, err) |
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device.Close() |
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continue |
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} |
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wallet.output, err = device.OpenEndpoint( |
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device.Descriptor.Configs[0].Config, |
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device.Descriptor.Configs[0].Interfaces[0].Number, |
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device.Descriptor.Configs[0].Interfaces[0].Setups[0].Number, |
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device.Descriptor.Configs[0].Interfaces[0].Setups[0].Endpoints[0].Address, |
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) |
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if err != nil { |
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glog.V(logger.Debug).Infof("ledger wallet [%s] output open failed: %v", wallet.url, err) |
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device.Close() |
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continue |
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} |
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// Start tracking the device as a probably Ledger wallet
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id := uint16(device.Bus)<<8 + uint16(device.Address) |
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hub.wallets[id] = wallet |
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if wallet.resolveVersion() != nil || wallet.resolveAddress() != nil { |
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glog.V(logger.Info).Infof("ledger wallet [%s] connected, Ethereum app not started", wallet.url) |
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} else { |
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hub.accounts = append(hub.accounts, accounts.Account{ |
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Address: wallet.address, |
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URL: wallet.url, |
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}) |
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hub.index[wallet.address] = id |
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glog.V(logger.Info).Infof("ledger wallet [%s] v%d.%d.%d connected: %s", wallet.url, |
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wallet.version[0], wallet.version[1], wallet.version[2], wallet.address.Hex()) |
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} |
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} |
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} |
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// resolveVersion retrieves the current version of the Ethereum wallet app running
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// on the Ledger wallet and caches it for future reference.
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//
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// The version retrieval protocol is defined as follows:
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//
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// CLA | INS | P1 | P2 | Lc | Le
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// ----+-----+----+----+----+---
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// E0 | 06 | 00 | 00 | 00 | 04
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//
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// With no input data, and the output data being:
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//
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// Description | Length
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// ---------------------------------------------------+--------
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// Flags 01: arbitrary data signature enabled by user | 1 byte
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// Application major version | 1 byte
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// Application minor version | 1 byte
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// Application patch version | 1 byte
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func (wallet *ledgerWallet) resolveVersion() error { |
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// Send the request and wait for the response
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reply, err := wallet.exchange(ledgerOpGetConfiguration, 0, 0, nil) |
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if err != nil { |
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return err |
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} |
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if len(reply) != 4 { |
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return errors.New("reply not of correct size") |
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} |
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// Cache the version for future reference
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copy(wallet.version[:], reply[1:]) |
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return nil |
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} |
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// resolveAddress retrieves the currently active Ethereum address from a Ledger
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// wallet and caches it for future reference.
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//
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// The address derivation protocol is defined as follows:
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//
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// CLA | INS | P1 | P2 | Lc | Le
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// ----+-----+----+----+-----+---
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// E0 | 02 | 00 return address
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// 01 display address and confirm before returning
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// | 00: do not return the chain code
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// | 01: return the chain code
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// | var | 00
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//
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// Where the input data is:
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//
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// Description | Length
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// -------------------------------------------------+--------
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// Number of BIP 32 derivations to perform (max 10) | 1 byte
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// First derivation index (big endian) | 4 bytes
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// ... | 4 bytes
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// Last derivation index (big endian) | 4 bytes
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//
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// And the output data is:
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//
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// Description | Length
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// ------------------------+-------------------
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// Public Key length | 1 byte
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// Uncompressed Public Key | arbitrary
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// Ethereum address length | 1 byte
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// Ethereum address | 40 bytes hex ascii
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// Chain code if requested | 32 bytes
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func (wallet *ledgerWallet) resolveAddress() error { |
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// Flatten the derivation path into the Ledger request
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path := make([]byte, 1+4*len(ledgerDerivationPath)) |
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path[0] = byte(len(ledgerDerivationPath)) |
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for i, component := range ledgerDerivationPath { |
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binary.BigEndian.PutUint32(path[1+4*i:], component) |
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} |
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// Send the request and wait for the response
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reply, err := wallet.exchange(ledgerOpRetrieveAddress, ledgerP1DirectlyFetchAddress, ledgerP2DiscardAddressChainCode, path) |
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if err != nil { |
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return err |
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} |
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// Discard the public key, we don't need that for now
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if len(reply) < 1 || len(reply) < 1+int(reply[0]) { |
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return errors.New("reply lacks public key entry") |
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} |
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reply = reply[1+int(reply[0]):] |
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// Extract the Ethereum hex address string
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if len(reply) < 1 || len(reply) < 1+int(reply[0]) { |
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return errors.New("reply lacks address entry") |
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} |
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hexstr := reply[1 : 1+int(reply[0])] |
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// Decode the hex sting into an Ethereum address and return
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hex.Decode(wallet.address[:], hexstr) |
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return nil |
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} |
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// sign sends the transaction to the Ledger wallet, and waits for the user to
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// confirm or deny the transaction.
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//
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// The transaction signing protocol is defined as follows:
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//
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// CLA | INS | P1 | P2 | Lc | Le
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// ----+-----+----+----+-----+---
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// E0 | 04 | 00: first transaction data block
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// 80: subsequent transaction data block
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// | 00 | variable | variable
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//
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// Where the input for the first transaction block (first 255 bytes) is:
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//
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// Description | Length
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// -------------------------------------------------+----------
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// Number of BIP 32 derivations to perform (max 10) | 1 byte
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// First derivation index (big endian) | 4 bytes
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// ... | 4 bytes
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// Last derivation index (big endian) | 4 bytes
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// RLP transaction chunk | arbitrary
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//
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// And the input for subsequent transaction blocks (first 255 bytes) are:
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//
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// Description | Length
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// ----------------------+----------
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// RLP transaction chunk | arbitrary
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//
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// And the output data is:
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//
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// Description | Length
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// ------------+---------
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// signature V | 1 byte
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// signature R | 32 bytes
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// signature S | 32 bytes
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func (wallet *ledgerWallet) sign(tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) { |
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// We need to modify the timeouts to account for user feedback
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defer func(old time.Duration) { wallet.device.ReadTimeout = old }(wallet.device.ReadTimeout) |
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wallet.device.ReadTimeout = time.Minute |
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// Flatten the derivation path into the Ledger request
|
||||
path := make([]byte, 1+4*len(ledgerDerivationPath)) |
||||
path[0] = byte(len(ledgerDerivationPath)) |
||||
for i, component := range ledgerDerivationPath { |
||||
binary.BigEndian.PutUint32(path[1+4*i:], component) |
||||
} |
||||
// Create the transaction RLP based on whether legacy or EIP155 signing was requeste
|
||||
var ( |
||||
txrlp []byte |
||||
err error |
||||
) |
||||
if chainID == nil { |
||||
if txrlp, err = rlp.EncodeToBytes([]interface{}{tx.Nonce(), tx.GasPrice(), tx.Gas(), tx.To(), tx.Value(), tx.Data()}); err != nil { |
||||
return nil, err |
||||
} |
||||
} else { |
||||
if txrlp, err = rlp.EncodeToBytes([]interface{}{tx.Nonce(), tx.GasPrice(), tx.Gas(), tx.To(), tx.Value(), tx.Data(), chainID, big.NewInt(0), big.NewInt(0)}); err != nil { |
||||
return nil, err |
||||
} |
||||
} |
||||
payload := append(path, txrlp...) |
||||
|
||||
// Send the request and wait for the response
|
||||
var ( |
||||
op = ledgerP1InitTransactionData |
||||
reply []byte |
||||
) |
||||
for len(payload) > 0 { |
||||
// Calculate the size of the next data chunk
|
||||
chunk := 255 |
||||
if chunk > len(payload) { |
||||
chunk = len(payload) |
||||
} |
||||
// Send the chunk over, ensuring it's processed correctly
|
||||
reply, err = wallet.exchange(ledgerOpSignTransaction, op, 0, payload[:chunk]) |
||||
if err != nil { |
||||
return nil, err |
||||
} |
||||
// Shift the payload and ensure subsequent chunks are marked as such
|
||||
payload = payload[chunk:] |
||||
op = ledgerP1ContTransactionData |
||||
} |
||||
// Extract the Ethereum signature and do a sanity validation
|
||||
if len(reply) != 65 { |
||||
return nil, errors.New("reply lacks signature") |
||||
} |
||||
signature := append(reply[1:], reply[0]) |
||||
|
||||
// Create the correct signer and signature transform based on the chain ID
|
||||
var signer types.Signer |
||||
if chainID == nil { |
||||
signer = new(types.HomesteadSigner) |
||||
} else { |
||||
signer = types.NewEIP155Signer(chainID) |
||||
signature[64] = (signature[64]-34)/2 - byte(chainID.Uint64()) |
||||
} |
||||
// Inject the final signature into the transaction and sanity check the sender
|
||||
signed, err := tx.WithSignature(signer, signature) |
||||
if err != nil { |
||||
return nil, err |
||||
} |
||||
sender, err := types.Sender(signer, signed) |
||||
if err != nil { |
||||
return nil, err |
||||
} |
||||
if sender != wallet.address { |
||||
glog.V(logger.Error).Infof("Ledger signer mismatch: expected %s, got %s", wallet.address.Hex(), sender.Hex()) |
||||
return nil, fmt.Errorf("signer mismatch: expected %s, got %s", wallet.address.Hex(), sender.Hex()) |
||||
} |
||||
return signed, nil |
||||
} |
||||
|
||||
// exchange performs a data exchange with the Ledger wallet, sending it a message
|
||||
// and retrieving the response.
|
||||
//
|
||||
// The common transport header is defined as follows:
|
||||
//
|
||||
// Description | Length
|
||||
// --------------------------------------+----------
|
||||
// Communication channel ID (big endian) | 2 bytes
|
||||
// Command tag | 1 byte
|
||||
// Packet sequence index (big endian) | 2 bytes
|
||||
// Payload | arbitrary
|
||||
//
|
||||
// The Communication channel ID allows commands multiplexing over the same
|
||||
// physical link. It is not used for the time being, and should be set to 0101
|
||||
// to avoid compatibility issues with implementations ignoring a leading 00 byte.
|
||||
//
|
||||
// The Command tag describes the message content. Use TAG_APDU (0x05) for standard
|
||||
// APDU payloads, or TAG_PING (0x02) for a simple link test.
|
||||
//
|
||||
// The Packet sequence index describes the current sequence for fragmented payloads.
|
||||
// The first fragment index is 0x00.
|
||||
//
|
||||
// APDU Command payloads are encoded as follows:
|
||||
//
|
||||
// Description | Length
|
||||
// -----------------------------------
|
||||
// APDU length (big endian) | 2 bytes
|
||||
// APDU CLA | 1 byte
|
||||
// APDU INS | 1 byte
|
||||
// APDU P1 | 1 byte
|
||||
// APDU P2 | 1 byte
|
||||
// APDU length | 1 byte
|
||||
// Optional APDU data | arbitrary
|
||||
func (wallet *ledgerWallet) exchange(opcode ledgerOpcode, p1 ledgerParam1, p2 ledgerParam2, data []byte) ([]byte, error) { |
||||
// Construct the message payload, possibly split into multiple chunks
|
||||
var chunks [][]byte |
||||
for left := data; len(left) > 0 || len(chunks) == 0; { |
||||
// Create the chunk header
|
||||
var chunk []byte |
||||
|
||||
if len(chunks) == 0 { |
||||
// The first chunk encodes the length and all the opcodes
|
||||
chunk = []byte{0x00, 0x00, 0xe0, byte(opcode), byte(p1), byte(p2), byte(len(data))} |
||||
binary.BigEndian.PutUint16(chunk, uint16(5+len(data))) |
||||
} |
||||
// Append the data blob to the end of the chunk
|
||||
space := 64 - len(chunk) - 5 // 5 == header size
|
||||
if len(left) > space { |
||||
chunks, left = append(chunks, append(chunk, left[:space]...)), left[space:] |
||||
continue |
||||
} |
||||
chunks, left = append(chunks, append(chunk, left...)), nil |
||||
} |
||||
// Stream all the chunks to the device
|
||||
for i, chunk := range chunks { |
||||
// Construct the new message to stream
|
||||
header := []byte{0x01, 0x01, 0x05, 0x00, 0x00} // Channel ID and command tag appended
|
||||
binary.BigEndian.PutUint16(header[3:], uint16(i)) |
||||
|
||||
msg := append(header, chunk...) |
||||
|
||||
// Send over to the device
|
||||
if glog.V(logger.Core) { |
||||
glog.Infof("-> %03d.%03d: %x", wallet.device.Bus, wallet.device.Address, msg) |
||||
} |
||||
if _, err := wallet.input.Write(msg); err != nil { |
||||
return nil, err |
||||
} |
||||
} |
||||
// Stream the reply back from the wallet in 64 byte chunks
|
||||
var reply []byte |
||||
for { |
||||
// Read the next chunk from the Ledger wallet
|
||||
chunk := make([]byte, 64) |
||||
if _, err := io.ReadFull(wallet.output, chunk); err != nil { |
||||
return nil, err |
||||
} |
||||
if glog.V(logger.Core) { |
||||
glog.Infof("<- %03d.%03d: %x", wallet.device.Bus, wallet.device.Address, chunk) |
||||
} |
||||
// Make sure the transport header matches
|
||||
if chunk[0] != 0x01 || chunk[1] != 0x01 || chunk[2] != 0x05 { |
||||
return nil, fmt.Errorf("invalid reply header: %x", chunk[:3]) |
||||
} |
||||
// If it's the first chunk, retrieve the total message length
|
||||
if chunk[3] == 0x00 && chunk[4] == 0x00 { |
||||
reply = make([]byte, 0, int(binary.BigEndian.Uint16(chunk[5:7]))) |
||||
chunk = chunk[7:] |
||||
} else { |
||||
chunk = chunk[5:] |
||||
} |
||||
// Append to the reply and stop when filled up
|
||||
if left := cap(reply) - len(reply); left > len(chunk) { |
||||
reply = append(reply, chunk...) |
||||
} else { |
||||
reply = append(reply, chunk[:left]...) |
||||
break |
||||
} |
||||
} |
||||
return reply[:len(reply)-2], nil |
||||
} |
||||
@ -0,0 +1,75 @@ |
||||
// Copyright 2017 The go-ethereum Authors
|
||||
// This file is part of the go-ethereum library.
|
||||
//
|
||||
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// The go-ethereum library 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 Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
||||
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
package usbwallet |
||||
|
||||
/* |
||||
func TestLedgerHub(t *testing.T) { |
||||
glog.SetV(6) |
||||
glog.SetToStderr(true) |
||||
|
||||
// Create a USB hub watching for Ledger devices
|
||||
hub, err := NewLedgerHub() |
||||
if err != nil { |
||||
t.Fatalf("Failed to create Ledger hub: %v", err) |
||||
} |
||||
defer hub.Close() |
||||
|
||||
// Wait for events :P
|
||||
time.Sleep(time.Minute) |
||||
} |
||||
*/ |
||||
/* |
||||
func TestLedger(t *testing.T) { |
||||
// Create a USB context to access devices through
|
||||
ctx, err := usb.NewContext() |
||||
defer ctx.Close() |
||||
ctx.Debug(6) |
||||
|
||||
// List all of the Ledger wallets
|
||||
wallets, err := findLedgerWallets(ctx) |
||||
if err != nil { |
||||
t.Fatalf("Failed to list Ledger wallets: %v", err) |
||||
} |
||||
// Retrieve the address from every one of them
|
||||
for _, wallet := range wallets { |
||||
// Retrieve the version of the wallet app
|
||||
ver, err := wallet.Version() |
||||
if err != nil { |
||||
t.Fatalf("Failed to retrieve wallet version: %v", err) |
||||
} |
||||
fmt.Printf("Ledger version: %s\n", ver) |
||||
|
||||
// Retrieve the address of the wallet
|
||||
addr, err := wallet.Address() |
||||
if err != nil { |
||||
t.Fatalf("Failed to retrieve wallet address: %v", err) |
||||
} |
||||
fmt.Printf("Ledger address: %x\n", addr) |
||||
|
||||
// Try to sign a transaction with the wallet
|
||||
unsigned := types.NewTransaction(1, common.HexToAddress("0xbabababababababababababababababababababa"), common.Ether, big.NewInt(20000), common.Shannon, nil) |
||||
signed, err := wallet.Sign(unsigned) |
||||
if err != nil { |
||||
t.Fatalf("Failed to sign transactions: %v", err) |
||||
} |
||||
signer, err := types.Sender(types.NewEIP155Signer(big.NewInt(1)), signed) |
||||
if err != nil { |
||||
t.Fatalf("Failed to recover signer: %v", err) |
||||
} |
||||
fmt.Printf("Ledger signature by: %x\n", signer) |
||||
} |
||||
}*/ |
||||
@ -0,0 +1,27 @@ |
||||
// Copyright 2017 The go-ethereum Authors
|
||||
// This file is part of the go-ethereum library.
|
||||
//
|
||||
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// The go-ethereum library 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 Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
||||
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
// Package usbwallet implements support for USB hardware wallets.
|
||||
package usbwallet |
||||
|
||||
import "github.com/karalabe/gousb/usb" |
||||
|
||||
// deviceID is a combined vendor/product identifier to uniquely identify a USB
|
||||
// hardware device.
|
||||
type deviceID struct { |
||||
Vendor usb.ID // The Vendor identifer
|
||||
Product usb.ID // The Product identifier
|
||||
} |
||||
Loading…
Reference in new issue