diff --git a/accounts/accounts.go b/accounts/accounts.go
index 5872bb4a3d9b0a21f0223cc68754c77b849ba786..76951e1a42a60f92012f23383e22e8737aee2e63 100644
--- a/accounts/accounts.go
+++ b/accounts/accounts.go
@@ -42,8 +42,9 @@ type Wallet interface {
URL() URL
// Status returns a textual status to aid the user in the current state of the
- // wallet.
- Status() string
+ // wallet. It also returns an error indicating any failure the wallet might have
+ // encountered.
+ Status() (string, error)
// Open initializes access to a wallet instance. It is not meant to unlock or
// decrypt account keys, rather simply to establish a connection to hardware
diff --git a/accounts/hd_test.go b/accounts/hd_test.go
index 83ec34adbaf9ed0a3f24c60a2850cbb804525850..b6b23230dc7426c82070ee19e67451c3ca0b85b4 100644
--- a/accounts/hd_test.go
+++ b/accounts/hd_test.go
@@ -37,11 +37,11 @@ func TestHDPathParsing(t *testing.T) {
{"m/2147483692/2147483708/2147483648/2147483648", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 0}},
// Plain relative derivation paths
- {"0", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}},
- {"128", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 128}},
- {"0'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 0}},
- {"128'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 128}},
- {"2147483648", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 0}},
+ {"0", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0}},
+ {"128", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 128}},
+ {"0'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0x80000000 + 0}},
+ {"128'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0x80000000 + 128}},
+ {"2147483648", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0x80000000 + 0}},
// Hexadecimal absolute derivation paths
{"m/0x2C'/0x3c'/0x00'/0x00", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}},
@@ -52,11 +52,11 @@ func TestHDPathParsing(t *testing.T) {
{"m/0x8000002C/0x8000003c/0x80000000/0x80000000", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 0}},
// Hexadecimal relative derivation paths
- {"0x00", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}},
- {"0x80", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 128}},
- {"0x00'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 0}},
- {"0x80'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 128}},
- {"0x80000000", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 0}},
+ {"0x00", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0}},
+ {"0x80", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 128}},
+ {"0x00'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0x80000000 + 0}},
+ {"0x80'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0x80000000 + 128}},
+ {"0x80000000", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0x80000000 + 0}},
// Weird inputs just to ensure they work
{" m / 44 '\n/\n 60 \n\n\t' /\n0 ' /\t\t 0", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}},
diff --git a/accounts/keystore/keystore_wallet.go b/accounts/keystore/keystore_wallet.go
index 7165d282172da76a09b0e8e7c62a9417295421c8..758fdfe3643866c3cf20b96e6658d2d7ce2ddb71 100644
--- a/accounts/keystore/keystore_wallet.go
+++ b/accounts/keystore/keystore_wallet.go
@@ -36,16 +36,16 @@ func (w *keystoreWallet) URL() accounts.URL {
return w.account.URL
}
-// Status implements accounts.Wallet, always returning "open", since there is no
-// concept of open/close for plain keystore accounts.
-func (w *keystoreWallet) Status() string {
+// Status implements accounts.Wallet, returning whether the account held by the
+// keystore wallet is unlocked or not.
+func (w *keystoreWallet) Status() (string, error) {
w.keystore.mu.RLock()
defer w.keystore.mu.RUnlock()
if _, ok := w.keystore.unlocked[w.account.Address]; ok {
- return "Unlocked"
+ return "Unlocked", nil
}
- return "Locked"
+ return "Locked", nil
}
// Open implements accounts.Wallet, but is a noop for plain wallets since there
diff --git a/accounts/usbwallet/ledger_hub.go b/accounts/usbwallet/hub.go
similarity index 65%
rename from accounts/usbwallet/ledger_hub.go
rename to accounts/usbwallet/hub.go
index ffe7cffe474d28d57379dae0d5ac2392c4da1547..7069d2531109eca6f8aaebce52be8ff4408d9720 100644
--- a/accounts/usbwallet/ledger_hub.go
+++ b/accounts/usbwallet/hub.go
@@ -29,24 +29,28 @@ import (
)
// LedgerScheme is the protocol scheme prefixing account and wallet URLs.
-var LedgerScheme = "ledger"
+const LedgerScheme = "ledger"
-// ledgerDeviceIDs are the known device IDs that Ledger wallets use.
-var ledgerDeviceIDs = []deviceID{
- {Vendor: 0x2c97, Product: 0x0000}, // Ledger Blue
- {Vendor: 0x2c97, Product: 0x0001}, // Ledger Nano S
-}
+// TrezorScheme is the protocol scheme prefixing account and wallet URLs.
+const TrezorScheme = "trezor"
+
+// refreshCycle is the maximum time between wallet refreshes (if USB hotplug
+// notifications don't work).
+const refreshCycle = time.Second
-// Maximum time between wallet refreshes (if USB hotplug notifications don't work).
-const ledgerRefreshCycle = time.Second
+// refreshThrottling is the minimum time between wallet refreshes to avoid USB
+// trashing.
+const refreshThrottling = 500 * time.Millisecond
-// Minimum time between wallet refreshes to avoid USB trashing.
-const ledgerRefreshThrottling = 500 * time.Millisecond
+// Hub is a accounts.Backend that can find and handle generic USB hardware wallets.
+type Hub struct {
+ scheme string // Protocol scheme prefixing account and wallet URLs.
+ vendorID uint16 // USB vendor identifier used for device discovery
+ productIDs []uint16 // USB product identifiers used for device discovery
+ makeDriver func(log.Logger) driver // Factory method to construct a vendor specific driver
-// LedgerHub is a accounts.Backend that can find and handle Ledger hardware wallets.
-type LedgerHub struct {
refreshed time.Time // Time instance when the list of wallets was last refreshed
- wallets []accounts.Wallet // List of Ledger devices currently tracking
+ wallets []accounts.Wallet // List of USB wallet devices currently tracking
updateFeed event.Feed // Event feed to notify wallet additions/removals
updateScope event.SubscriptionScope // Subscription scope tracking current live listeners
updating bool // Whether the event notification loop is running
@@ -61,20 +65,34 @@ type LedgerHub struct {
}
// NewLedgerHub creates a new hardware wallet manager for Ledger devices.
-func NewLedgerHub() (*LedgerHub, error) {
+func NewLedgerHub() (*Hub, error) {
+ return newHub(LedgerScheme, 0x2c97, []uint16{0x0000 /* Ledger Blue */, 0x0001 /* Ledger Nano S */}, newLedgerDriver)
+}
+
+// NewTrezorHub creates a new hardware wallet manager for Trezor devices.
+func NewTrezorHub() (*Hub, error) {
+ return newHub(TrezorScheme, 0x534c, []uint16{0x0001 /* Trezor 1 */}, newTrezorDriver)
+}
+
+// newHub creates a new hardware wallet manager for generic USB devices.
+func newHub(scheme string, vendorID uint16, productIDs []uint16, makeDriver func(log.Logger) driver) (*Hub, error) {
if !hid.Supported() {
return nil, errors.New("unsupported platform")
}
- hub := &LedgerHub{
- quit: make(chan chan error),
+ hub := &Hub{
+ scheme: scheme,
+ vendorID: vendorID,
+ productIDs: productIDs,
+ makeDriver: makeDriver,
+ quit: make(chan chan error),
}
hub.refreshWallets()
return hub, nil
}
// Wallets implements accounts.Backend, returning all the currently tracked USB
-// devices that appear to be Ledger hardware wallets.
-func (hub *LedgerHub) Wallets() []accounts.Wallet {
+// devices that appear to be hardware wallets.
+func (hub *Hub) Wallets() []accounts.Wallet {
// Make sure the list of wallets is up to date
hub.refreshWallets()
@@ -88,17 +106,17 @@ func (hub *LedgerHub) Wallets() []accounts.Wallet {
// refreshWallets scans the USB devices attached to the machine and updates the
// list of wallets based on the found devices.
-func (hub *LedgerHub) refreshWallets() {
+func (hub *Hub) refreshWallets() {
// Don't scan the USB like crazy it the user fetches wallets in a loop
hub.stateLock.RLock()
elapsed := time.Since(hub.refreshed)
hub.stateLock.RUnlock()
- if elapsed < ledgerRefreshThrottling {
+ if elapsed < refreshThrottling {
return
}
- // Retrieve the current list of Ledger devices
- var ledgers []hid.DeviceInfo
+ // Retrieve the current list of USB wallet devices
+ var devices []hid.DeviceInfo
if runtime.GOOS == "linux" {
// hidapi on Linux opens the device during enumeration to retrieve some infos,
@@ -113,10 +131,10 @@ func (hub *LedgerHub) refreshWallets() {
return
}
}
- for _, info := range hid.Enumerate(0, 0) { // Can't enumerate directly, one valid ID is the 0 wildcard
- for _, id := range ledgerDeviceIDs {
- if info.VendorID == id.Vendor && info.ProductID == id.Product {
- ledgers = append(ledgers, info)
+ for _, info := range hid.Enumerate(hub.vendorID, 0) {
+ for _, id := range hub.productIDs {
+ if info.ProductID == id && info.Interface == 0 {
+ devices = append(devices, info)
break
}
}
@@ -128,20 +146,27 @@ func (hub *LedgerHub) refreshWallets() {
// Transform the current list of wallets into the new one
hub.stateLock.Lock()
- wallets := make([]accounts.Wallet, 0, len(ledgers))
+ wallets := make([]accounts.Wallet, 0, len(devices))
events := []accounts.WalletEvent{}
- for _, ledger := range ledgers {
- url := accounts.URL{Scheme: LedgerScheme, Path: ledger.Path}
+ for _, device := range devices {
+ url := accounts.URL{Scheme: hub.scheme, Path: device.Path}
// Drop wallets in front of the next device or those that failed for some reason
- for len(hub.wallets) > 0 && (hub.wallets[0].URL().Cmp(url) < 0 || hub.wallets[0].(*ledgerWallet).failed()) {
+ for len(hub.wallets) > 0 {
+ // Abort if we're past the current device and found an operational one
+ _, failure := hub.wallets[0].Status()
+ if hub.wallets[0].URL().Cmp(url) >= 0 || failure == nil {
+ break
+ }
+ // Drop the stale and failed devices
events = append(events, accounts.WalletEvent{Wallet: hub.wallets[0], Kind: accounts.WalletDropped})
hub.wallets = hub.wallets[1:]
}
// If there are no more wallets or the device is before the next, wrap new wallet
if len(hub.wallets) == 0 || hub.wallets[0].URL().Cmp(url) > 0 {
- wallet := &ledgerWallet{hub: hub, url: &url, info: ledger, log: log.New("url", url)}
+ logger := log.New("url", url)
+ wallet := &wallet{hub: hub, driver: hub.makeDriver(logger), url: &url, info: device, log: logger}
events = append(events, accounts.WalletEvent{Wallet: wallet, Kind: accounts.WalletArrived})
wallets = append(wallets, wallet)
@@ -169,8 +194,8 @@ func (hub *LedgerHub) refreshWallets() {
}
// Subscribe implements accounts.Backend, creating an async subscription to
-// receive notifications on the addition or removal of Ledger wallets.
-func (hub *LedgerHub) Subscribe(sink chan<- accounts.WalletEvent) event.Subscription {
+// receive notifications on the addition or removal of USB wallets.
+func (hub *Hub) Subscribe(sink chan<- accounts.WalletEvent) event.Subscription {
// We need the mutex to reliably start/stop the update loop
hub.stateLock.Lock()
defer hub.stateLock.Unlock()
@@ -186,16 +211,13 @@ func (hub *LedgerHub) Subscribe(sink chan<- accounts.WalletEvent) event.Subscrip
return sub
}
-// updater is responsible for maintaining an up-to-date list of wallets stored in
-// the keystore, and for firing wallet addition/removal events. It listens for
-// account change events from the underlying account cache, and also periodically
-// forces a manual refresh (only triggers for systems where the filesystem notifier
-// is not running).
-func (hub *LedgerHub) updater() {
+// updater is responsible for maintaining an up-to-date list of wallets managed
+// by the USB hub, and for firing wallet addition/removal events.
+func (hub *Hub) updater() {
for {
// TODO: Wait for a USB hotplug event (not supported yet) or a refresh timeout
// <-hub.changes
- time.Sleep(ledgerRefreshCycle)
+ time.Sleep(refreshCycle)
// Run the wallet refresher
hub.refreshWallets()
diff --git a/accounts/usbwallet/ledger.go b/accounts/usbwallet/ledger.go
new file mode 100644
index 0000000000000000000000000000000000000000..f5def61d235c6e56f0be9dcd28546836b8e92c74
--- /dev/null
+++ b/accounts/usbwallet/ledger.go
@@ -0,0 +1,464 @@
+// 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/>.
+
+// This file contains the implementation for interacting with the Ledger hardware
+// wallets. The wire protocol spec can be found in the Ledger Blue GitHub repo:
+// https://raw.githubusercontent.com/LedgerHQ/blue-app-eth/master/doc/ethapp.asc
+
+package usbwallet
+
+import (
+ "encoding/binary"
+ "encoding/hex"
+ "errors"
+ "fmt"
+ "io"
+ "math/big"
+
+ "github.com/ethereum/go-ethereum/accounts"
+ "github.com/ethereum/go-ethereum/common"
+ "github.com/ethereum/go-ethereum/common/hexutil"
+ "github.com/ethereum/go-ethereum/core/types"
+ "github.com/ethereum/go-ethereum/log"
+ "github.com/ethereum/go-ethereum/rlp"
+)
+
+// ledgerOpcode is an enumeration encoding the supported Ledger opcodes.
+type ledgerOpcode byte
+
+// ledgerParam1 is an enumeration encoding the supported Ledger parameters for
+// specific opcodes. The same parameter values may be reused between opcodes.
+type ledgerParam1 byte
+
+// ledgerParam2 is an enumeration encoding the supported Ledger parameters for
+// specific opcodes. The same parameter values may be reused between opcodes.
+type ledgerParam2 byte
+
+const (
+ ledgerOpRetrieveAddress ledgerOpcode = 0x02 // Returns the public key and Ethereum address for a given BIP 32 path
+ ledgerOpSignTransaction ledgerOpcode = 0x04 // Signs an Ethereum transaction after having the user validate the parameters
+ ledgerOpGetConfiguration ledgerOpcode = 0x06 // Returns specific wallet application configuration
+
+ ledgerP1DirectlyFetchAddress ledgerParam1 = 0x00 // Return address directly from the wallet
+ ledgerP1ConfirmFetchAddress ledgerParam1 = 0x01 // Require a user confirmation before returning the address
+ ledgerP1InitTransactionData ledgerParam1 = 0x00 // First transaction data block for signing
+ ledgerP1ContTransactionData ledgerParam1 = 0x80 // Subsequent transaction data block for signing
+ ledgerP2DiscardAddressChainCode ledgerParam2 = 0x00 // Do not return the chain code along with the address
+ ledgerP2ReturnAddressChainCode ledgerParam2 = 0x01 // Require a user confirmation before returning the address
+)
+
+// errLedgerReplyInvalidHeader is the error message returned by a Ledger data exchange
+// if the device replies with a mismatching header. This usually means the device
+// is in browser mode.
+var errLedgerReplyInvalidHeader = errors.New("ledger: invalid reply header")
+
+// errLedgerInvalidVersionReply is the error message returned by a Ledger version retrieval
+// when a response does arrive, but it does not contain the expected data.
+var errLedgerInvalidVersionReply = errors.New("ledger: invalid version reply")
+
+// ledgerDriver implements the communication with a Ledger hardware wallet.
+type ledgerDriver struct {
+ device io.ReadWriter // USB device connection to communicate through
+ version [3]byte // Current version of the Ledger firmware (zero if app is offline)
+ browser bool // Flag whether the Ledger is in browser mode (reply channel mismatch)
+ failure error // Any failure that would make the device unusable
+ log log.Logger // Contextual logger to tag the ledger with its id
+}
+
+// newLedgerDriver creates a new instance of a Ledger USB protocol driver.
+func newLedgerDriver(logger log.Logger) driver {
+ return &ledgerDriver{
+ log: logger,
+ }
+}
+
+// Status implements usbwallet.driver, returning various states the Ledger can
+// currently be in.
+func (w *ledgerDriver) Status() (string, error) {
+ if w.failure != nil {
+ return fmt.Sprintf("Failed: %v", w.failure), w.failure
+ }
+ if w.browser {
+ return "Ethereum app in browser mode", w.failure
+ }
+ if w.offline() {
+ return "Ethereum app offline", w.failure
+ }
+ return fmt.Sprintf("Ethereum app v%d.%d.%d online", w.version[0], w.version[1], w.version[2]), w.failure
+}
+
+// offline returns whether the wallet and the Ethereum app is offline or not.
+//
+// The method assumes that the state lock is held!
+func (w *ledgerDriver) offline() bool {
+ return w.version == [3]byte{0, 0, 0}
+}
+
+// Open implements usbwallet.driver, attempting to initialize the connection to the
+// Ledger hardware wallet. The Ledger does not require a user passphrase, so that
+// parameter is silently discarded.
+func (w *ledgerDriver) Open(device io.ReadWriter, passphrase string) error {
+ w.device, w.failure = device, nil
+
+ _, err := w.ledgerDerive(accounts.DefaultBaseDerivationPath)
+ if err != nil {
+ // Ethereum app is not running or in browser mode, nothing more to do, return
+ if err == errLedgerReplyInvalidHeader {
+ w.browser = true
+ }
+ return nil
+ }
+ // Try to resolve the Ethereum app's version, will fail prior to v1.0.2
+ if w.version, err = w.ledgerVersion(); err != nil {
+ w.version = [3]byte{1, 0, 0} // Assume worst case, can't verify if v1.0.0 or v1.0.1
+ }
+ return nil
+}
+
+// Close implements usbwallet.driver, cleaning up and metadata maintained within
+// the Ledger driver.
+func (w *ledgerDriver) Close() error {
+ w.browser, w.version = false, [3]byte{}
+ return nil
+}
+
+// Heartbeat implements usbwallet.driver, performing a sanity check against the
+// Ledger to see if it's still online.
+func (w *ledgerDriver) Heartbeat() error {
+ if _, err := w.ledgerVersion(); err != nil && err != errLedgerInvalidVersionReply {
+ w.failure = err
+ return err
+ }
+ return nil
+}
+
+// Derive implements usbwallet.driver, sending a derivation request to the Ledger
+// and returning the Ethereum address located on that derivation path.
+func (w *ledgerDriver) Derive(path accounts.DerivationPath) (common.Address, error) {
+ return w.ledgerDerive(path)
+}
+
+// SignTx implements usbwallet.driver, sending the transaction to the Ledger and
+// waiting for the user to confirm or deny the transaction.
+//
+// Note, if the version of the Ethereum application running on the Ledger wallet is
+// too old to sign EIP-155 transactions, but such is requested nonetheless, an error
+// will be returned opposed to silently signing in Homestead mode.
+func (w *ledgerDriver) SignTx(path accounts.DerivationPath, tx *types.Transaction, chainID *big.Int) (common.Address, *types.Transaction, error) {
+ // If the Ethereum app doesn't run, abort
+ if w.offline() {
+ return common.Address{}, nil, accounts.ErrWalletClosed
+ }
+ // Ensure the wallet is capable of signing the given transaction
+ if chainID != nil && w.version[0] <= 1 && w.version[1] <= 0 && w.version[2] <= 2 {
+ return common.Address{}, nil, fmt.Errorf("Ledger v%d.%d.%d doesn't support signing this transaction, please update to v1.0.3 at least", w.version[0], w.version[1], w.version[2])
+ }
+ // All infos gathered and metadata checks out, request signing
+ return w.ledgerSign(path, tx, chainID)
+}
+
+// ledgerVersion retrieves the current version of the Ethereum wallet app running
+// on the Ledger wallet.
+//
+// The version retrieval protocol is defined as follows:
+//
+// CLA | INS | P1 | P2 | Lc | Le
+// ----+-----+----+----+----+---
+// E0 | 06 | 00 | 00 | 00 | 04
+//
+// With no input data, and the output data being:
+//
+// Description | Length
+// ---------------------------------------------------+--------
+// Flags 01: arbitrary data signature enabled by user | 1 byte
+// Application major version | 1 byte
+// Application minor version | 1 byte
+// Application patch version | 1 byte
+func (w *ledgerDriver) ledgerVersion() ([3]byte, error) {
+ // Send the request and wait for the response
+ reply, err := w.ledgerExchange(ledgerOpGetConfiguration, 0, 0, nil)
+ if err != nil {
+ return [3]byte{}, err
+ }
+ if len(reply) != 4 {
+ return [3]byte{}, errLedgerInvalidVersionReply
+ }
+ // Cache the version for future reference
+ var version [3]byte
+ copy(version[:], reply[1:])
+ return version, nil
+}
+
+// ledgerDerive retrieves the currently active Ethereum address from a Ledger
+// wallet at the specified derivation path.
+//
+// The address derivation protocol is defined as follows:
+//
+// CLA | INS | P1 | P2 | Lc | Le
+// ----+-----+----+----+-----+---
+// E0 | 02 | 00 return address
+// 01 display address and confirm before returning
+// | 00: do not return the chain code
+// | 01: return the chain code
+// | var | 00
+//
+// Where the input data is:
+//
+// Description | Length
+// -------------------------------------------------+--------
+// Number of BIP 32 derivations to perform (max 10) | 1 byte
+// First derivation index (big endian) | 4 bytes
+// ... | 4 bytes
+// Last derivation index (big endian) | 4 bytes
+//
+// And the output data is:
+//
+// Description | Length
+// ------------------------+-------------------
+// Public Key length | 1 byte
+// Uncompressed Public Key | arbitrary
+// Ethereum address length | 1 byte
+// Ethereum address | 40 bytes hex ascii
+// Chain code if requested | 32 bytes
+func (w *ledgerDriver) ledgerDerive(derivationPath []uint32) (common.Address, error) {
+ // Flatten the derivation path into the Ledger request
+ path := make([]byte, 1+4*len(derivationPath))
+ path[0] = byte(len(derivationPath))
+ for i, component := range derivationPath {
+ binary.BigEndian.PutUint32(path[1+4*i:], component)
+ }
+ // Send the request and wait for the response
+ reply, err := w.ledgerExchange(ledgerOpRetrieveAddress, ledgerP1DirectlyFetchAddress, ledgerP2DiscardAddressChainCode, path)
+ if err != nil {
+ return common.Address{}, err
+ }
+ // Discard the public key, we don't need that for now
+ if len(reply) < 1 || len(reply) < 1+int(reply[0]) {
+ return common.Address{}, errors.New("reply lacks public key entry")
+ }
+ reply = reply[1+int(reply[0]):]
+
+ // Extract the Ethereum hex address string
+ if len(reply) < 1 || len(reply) < 1+int(reply[0]) {
+ return common.Address{}, errors.New("reply lacks address entry")
+ }
+ hexstr := reply[1 : 1+int(reply[0])]
+
+ // Decode the hex sting into an Ethereum address and return
+ var address common.Address
+ hex.Decode(address[:], hexstr)
+ return address, nil
+}
+
+// ledgerSign sends the transaction to the Ledger wallet, and waits for the user
+// to confirm or deny the transaction.
+//
+// The transaction signing protocol is defined as follows:
+//
+// CLA | INS | P1 | P2 | Lc | Le
+// ----+-----+----+----+-----+---
+// E0 | 04 | 00: first transaction data block
+// 80: subsequent transaction data block
+// | 00 | variable | variable
+//
+// Where the input for the first transaction block (first 255 bytes) is:
+//
+// Description | Length
+// -------------------------------------------------+----------
+// Number of BIP 32 derivations to perform (max 10) | 1 byte
+// First derivation index (big endian) | 4 bytes
+// ... | 4 bytes
+// Last derivation index (big endian) | 4 bytes
+// RLP transaction chunk | arbitrary
+//
+// And the input for subsequent transaction blocks (first 255 bytes) are:
+//
+// Description | Length
+// ----------------------+----------
+// RLP transaction chunk | arbitrary
+//
+// And the output data is:
+//
+// Description | Length
+// ------------+---------
+// signature V | 1 byte
+// signature R | 32 bytes
+// signature S | 32 bytes
+func (w *ledgerDriver) ledgerSign(derivationPath []uint32, tx *types.Transaction, chainID *big.Int) (common.Address, *types.Transaction, error) {
+ // Flatten the derivation path into the Ledger request
+ path := make([]byte, 1+4*len(derivationPath))
+ path[0] = byte(len(derivationPath))
+ for i, component := range derivationPath {
+ 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 common.Address{}, 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 common.Address{}, 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 = w.ledgerExchange(ledgerOpSignTransaction, op, 0, payload[:chunk])
+ if err != nil {
+ return common.Address{}, 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 common.Address{}, 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] - byte(chainID.Uint64()*2+35)
+ }
+ signed, err := tx.WithSignature(signer, signature)
+ if err != nil {
+ return common.Address{}, nil, err
+ }
+ sender, err := types.Sender(signer, signed)
+ if err != nil {
+ return common.Address{}, nil, err
+ }
+ return sender, signed, nil
+}
+
+// ledgerExchange 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 (w *ledgerDriver) ledgerExchange(opcode ledgerOpcode, p1 ledgerParam1, p2 ledgerParam2, data []byte) ([]byte, error) {
+ // Construct the message payload, possibly split into multiple chunks
+ apdu := make([]byte, 2, 7+len(data))
+
+ binary.BigEndian.PutUint16(apdu, uint16(5+len(data)))
+ apdu = append(apdu, []byte{0xe0, byte(opcode), byte(p1), byte(p2), byte(len(data))}...)
+ apdu = append(apdu, data...)
+
+ // Stream all the chunks to the device
+ header := []byte{0x01, 0x01, 0x05, 0x00, 0x00} // Channel ID and command tag appended
+ chunk := make([]byte, 64)
+ space := len(chunk) - len(header)
+
+ for i := 0; len(apdu) > 0; i++ {
+ // Construct the new message to stream
+ chunk = append(chunk[:0], header...)
+ binary.BigEndian.PutUint16(chunk[3:], uint16(i))
+
+ if len(apdu) > space {
+ chunk = append(chunk, apdu[:space]...)
+ apdu = apdu[space:]
+ } else {
+ chunk = append(chunk, apdu...)
+ apdu = nil
+ }
+ // Send over to the device
+ w.log.Trace("Data chunk sent to the Ledger", "chunk", hexutil.Bytes(chunk))
+ if _, err := w.device.Write(chunk); err != nil {
+ return nil, err
+ }
+ }
+ // Stream the reply back from the wallet in 64 byte chunks
+ var reply []byte
+ chunk = chunk[:64] // Yeah, we surely have enough space
+ for {
+ // Read the next chunk from the Ledger wallet
+ if _, err := io.ReadFull(w.device, chunk); err != nil {
+ return nil, err
+ }
+ w.log.Trace("Data chunk received from the Ledger", "chunk", hexutil.Bytes(chunk))
+
+ // Make sure the transport header matches
+ if chunk[0] != 0x01 || chunk[1] != 0x01 || chunk[2] != 0x05 {
+ return nil, errLedgerReplyInvalidHeader
+ }
+ // If it's the first chunk, retrieve the total message length
+ var payload []byte
+
+ if chunk[3] == 0x00 && chunk[4] == 0x00 {
+ reply = make([]byte, 0, int(binary.BigEndian.Uint16(chunk[5:7])))
+ payload = chunk[7:]
+ } else {
+ payload = chunk[5:]
+ }
+ // Append to the reply and stop when filled up
+ if left := cap(reply) - len(reply); left > len(payload) {
+ reply = append(reply, payload...)
+ } else {
+ reply = append(reply, payload[:left]...)
+ break
+ }
+ }
+ return reply[:len(reply)-2], nil
+}
diff --git a/accounts/usbwallet/ledger_wallet.go b/accounts/usbwallet/ledger_wallet.go
deleted file mode 100644
index b8f04d74c048f9f1e0ef8318470e9c8af27c9183..0000000000000000000000000000000000000000
--- a/accounts/usbwallet/ledger_wallet.go
+++ /dev/null
@@ -1,898 +0,0 @@
-// 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/>.
-
-// This file contains the implementation for interacting with the Ledger hardware
-// wallets. The wire protocol spec can be found in the Ledger Blue GitHub repo:
-// https://raw.githubusercontent.com/LedgerHQ/blue-app-eth/master/doc/ethapp.asc
-
-package usbwallet
-
-import (
- "context"
- "encoding/binary"
- "encoding/hex"
- "errors"
- "fmt"
- "io"
- "math/big"
- "sync"
- "time"
-
- ethereum "github.com/ethereum/go-ethereum"
- "github.com/ethereum/go-ethereum/accounts"
- "github.com/ethereum/go-ethereum/common"
- "github.com/ethereum/go-ethereum/common/hexutil"
- "github.com/ethereum/go-ethereum/core/types"
- "github.com/ethereum/go-ethereum/log"
- "github.com/ethereum/go-ethereum/rlp"
- "github.com/karalabe/hid"
-)
-
-// ledgerOpcode is an enumeration encoding the supported Ledger opcodes.
-type ledgerOpcode byte
-
-// ledgerParam1 is an enumeration encoding the supported Ledger parameters for
-// specific opcodes. The same parameter values may be reused between opcodes.
-type ledgerParam1 byte
-
-// ledgerParam2 is an enumeration encoding the supported Ledger parameters for
-// specific opcodes. The same parameter values may be reused between opcodes.
-type ledgerParam2 byte
-
-const (
- ledgerOpRetrieveAddress ledgerOpcode = 0x02 // Returns the public key and Ethereum address for a given BIP 32 path
- ledgerOpSignTransaction ledgerOpcode = 0x04 // Signs an Ethereum transaction after having the user validate the parameters
- ledgerOpGetConfiguration ledgerOpcode = 0x06 // Returns specific wallet application configuration
-
- ledgerP1DirectlyFetchAddress ledgerParam1 = 0x00 // Return address directly from the wallet
- ledgerP1ConfirmFetchAddress ledgerParam1 = 0x01 // Require a user confirmation before returning the address
- ledgerP1InitTransactionData ledgerParam1 = 0x00 // First transaction data block for signing
- ledgerP1ContTransactionData ledgerParam1 = 0x80 // Subsequent transaction data block for signing
- ledgerP2DiscardAddressChainCode ledgerParam2 = 0x00 // Do not return the chain code along with the address
- ledgerP2ReturnAddressChainCode ledgerParam2 = 0x01 // Require a user confirmation before returning the address
-)
-
-// errReplyInvalidHeader is the error message returned by a Ledger data exchange
-// if the device replies with a mismatching header. This usually means the device
-// is in browser mode.
-var errReplyInvalidHeader = errors.New("invalid reply header")
-
-// errInvalidVersionReply is the error message returned by a Ledger version retrieval
-// when a response does arrive, but it does not contain the expected data.
-var errInvalidVersionReply = errors.New("invalid version reply")
-
-// ledgerWallet represents a live USB Ledger hardware wallet.
-type ledgerWallet struct {
- hub *LedgerHub // USB hub the device originates from (TODO(karalabe): remove if hotplug lands on Windows)
- url *accounts.URL // Textual URL uniquely identifying this wallet
-
- info hid.DeviceInfo // Known USB device infos about the wallet
- device *hid.Device // USB device advertising itself as a Ledger wallet
- failure error // Any failure that would make the device unusable
-
- version [3]byte // Current version of the Ledger Ethereum app (zero if app is offline)
- browser bool // Flag whether the Ledger is in browser mode (reply channel mismatch)
- accounts []accounts.Account // List of derive accounts pinned on the Ledger
- paths map[common.Address]accounts.DerivationPath // Known derivation paths for signing operations
-
- deriveNextPath accounts.DerivationPath // Next derivation path for account auto-discovery
- deriveNextAddr common.Address // Next derived account address for auto-discovery
- deriveChain ethereum.ChainStateReader // Blockchain state reader to discover used account with
- deriveReq chan chan struct{} // Channel to request a self-derivation on
- deriveQuit chan chan error // Channel to terminate the self-deriver with
-
- healthQuit chan chan error
-
- // Locking a hardware wallet is a bit special. Since hardware devices are lower
- // performing, any communication with them might take a non negligible amount of
- // time. Worse still, waiting for user confirmation can take arbitrarily long,
- // but exclusive communication must be upheld during. Locking the entire wallet
- // in the mean time however would stall any parts of the system that don't want
- // to communicate, just read some state (e.g. list the accounts).
- //
- // As such, a hardware wallet needs two locks to function correctly. A state
- // lock can be used to protect the wallet's software-side internal state, which
- // must not be held exlusively during hardware communication. A communication
- // lock can be used to achieve exclusive access to the device itself, this one
- // however should allow "skipping" waiting for operations that might want to
- // use the device, but can live without too (e.g. account self-derivation).
- //
- // Since we have two locks, it's important to know how to properly use them:
- // - Communication requires the `device` to not change, so obtaining the
- // commsLock should be done after having a stateLock.
- // - Communication must not disable read access to the wallet state, so it
- // must only ever hold a *read* lock to stateLock.
- commsLock chan struct{} // Mutex (buf=1) for the USB comms without keeping the state locked
- stateLock sync.RWMutex // Protects read and write access to the wallet struct fields
-
- log log.Logger // Contextual logger to tag the ledger with its id
-}
-
-// URL implements accounts.Wallet, returning the URL of the Ledger device.
-func (w *ledgerWallet) URL() accounts.URL {
- return *w.url // Immutable, no need for a lock
-}
-
-// Status implements accounts.Wallet, always whether the Ledger is opened, closed
-// or whether the Ethereum app was not started on it.
-func (w *ledgerWallet) Status() string {
- w.stateLock.RLock() // No device communication, state lock is enough
- defer w.stateLock.RUnlock()
-
- if w.failure != nil {
- return fmt.Sprintf("Failed: %v", w.failure)
- }
- if w.device == nil {
- return "Closed"
- }
- if w.browser {
- return "Ethereum app in browser mode"
- }
- if w.offline() {
- return "Ethereum app offline"
- }
- return fmt.Sprintf("Ethereum app v%d.%d.%d online", w.version[0], w.version[1], w.version[2])
-}
-
-// offline returns whether the wallet and the Ethereum app is offline or not.
-//
-// The method assumes that the state lock is held!
-func (w *ledgerWallet) offline() bool {
- return w.version == [3]byte{0, 0, 0}
-}
-
-// failed returns if the USB device wrapped by the wallet failed for some reason.
-// This is used by the device scanner to report failed wallets as departed.
-//
-// The method assumes that the state lock is *not* held!
-func (w *ledgerWallet) failed() bool {
- w.stateLock.RLock() // No device communication, state lock is enough
- defer w.stateLock.RUnlock()
-
- return w.failure != nil
-}
-
-// Open implements accounts.Wallet, attempting to open a USB connection to the
-// Ledger hardware wallet. The Ledger does not require a user passphrase, so that
-// parameter is silently discarded.
-func (w *ledgerWallet) Open(passphrase string) error {
- w.stateLock.Lock() // State lock is enough since there's no connection yet at this point
- defer w.stateLock.Unlock()
-
- // If the wallet was already opened, don't try to open again
- if w.device != nil {
- return accounts.ErrWalletAlreadyOpen
- }
- // Otherwise iterate over all USB devices and find this again (no way to directly do this)
- device, err := w.info.Open()
- if err != nil {
- return err
- }
- // Wallet seems to be successfully opened, guess if the Ethereum app is running
- w.device = device
- w.commsLock = make(chan struct{}, 1)
- w.commsLock <- struct{}{} // Enable lock
-
- w.paths = make(map[common.Address]accounts.DerivationPath)
-
- w.deriveReq = make(chan chan struct{})
- w.deriveQuit = make(chan chan error)
- w.healthQuit = make(chan chan error)
-
- defer func() {
- go w.heartbeat()
- go w.selfDerive()
- }()
-
- if _, err = w.ledgerDerive(accounts.DefaultBaseDerivationPath); err != nil {
- // Ethereum app is not running or in browser mode, nothing more to do, return
- if err == errReplyInvalidHeader {
- w.browser = true
- }
- return nil
- }
- // Try to resolve the Ethereum app's version, will fail prior to v1.0.2
- if w.version, err = w.ledgerVersion(); err != nil {
- w.version = [3]byte{1, 0, 0} // Assume worst case, can't verify if v1.0.0 or v1.0.1
- }
- go w.hub.updateFeed.Send(accounts.WalletEvent{Wallet: w, Kind: accounts.WalletOpened})
-
- return nil
-}
-
-// heartbeat is a health check loop for the Ledger wallets to periodically verify
-// whether they are still present or if they malfunctioned. It is needed because:
-// - libusb on Windows doesn't support hotplug, so we can't detect USB unplugs
-// - communication timeout on the Ledger requires a device power cycle to fix
-func (w *ledgerWallet) heartbeat() {
- w.log.Debug("Ledger health-check started")
- defer w.log.Debug("Ledger health-check stopped")
-
- // Execute heartbeat checks until termination or error
- var (
- errc chan error
- err error
- )
- for errc == nil && err == nil {
- // Wait until termination is requested or the heartbeat cycle arrives
- select {
- case errc = <-w.healthQuit:
- // Termination requested
- continue
- case <-time.After(heartbeatCycle):
- // Heartbeat time
- }
- // Execute a tiny data exchange to see responsiveness
- w.stateLock.RLock()
- if w.device == nil {
- // Terminated while waiting for the lock
- w.stateLock.RUnlock()
- continue
- }
- <-w.commsLock // Don't lock state while resolving version
- _, err = w.ledgerVersion()
- w.commsLock <- struct{}{}
- w.stateLock.RUnlock()
-
- if err != nil && err != errInvalidVersionReply {
- w.stateLock.Lock() // Lock state to tear the wallet down
- w.failure = err
- w.close()
- w.stateLock.Unlock()
- }
- // Ignore non hardware related errors
- err = nil
- }
- // In case of error, wait for termination
- if err != nil {
- w.log.Debug("Ledger health-check failed", "err", err)
- errc = <-w.healthQuit
- }
- errc <- err
-}
-
-// Close implements accounts.Wallet, closing the USB connection to the Ledger.
-func (w *ledgerWallet) Close() error {
- // Ensure the wallet was opened
- w.stateLock.RLock()
- hQuit, dQuit := w.healthQuit, w.deriveQuit
- w.stateLock.RUnlock()
-
- // Terminate the health checks
- var herr error
- if hQuit != nil {
- errc := make(chan error)
- hQuit <- errc
- herr = <-errc // Save for later, we *must* close the USB
- }
- // Terminate the self-derivations
- var derr error
- if dQuit != nil {
- errc := make(chan error)
- dQuit <- errc
- derr = <-errc // Save for later, we *must* close the USB
- }
- // Terminate the device connection
- w.stateLock.Lock()
- defer w.stateLock.Unlock()
-
- w.healthQuit = nil
- w.deriveQuit = nil
- w.deriveReq = nil
-
- if err := w.close(); err != nil {
- return err
- }
- if herr != nil {
- return herr
- }
- return derr
-}
-
-// close is the internal wallet closer that terminates the USB connection and
-// resets all the fields to their defaults.
-//
-// Note, close assumes the state lock is held!
-func (w *ledgerWallet) close() error {
- // Allow duplicate closes, especially for health-check failures
- if w.device == nil {
- return nil
- }
- // Close the device, clear everything, then return
- w.device.Close()
- w.device = nil
-
- w.browser, w.version = false, [3]byte{}
- w.accounts, w.paths = nil, nil
-
- return nil
-}
-
-// Accounts implements accounts.Wallet, returning the list of accounts pinned to
-// the Ledger hardware wallet. If self-derivation was enabled, the account list
-// is periodically expanded based on current chain state.
-func (w *ledgerWallet) Accounts() []accounts.Account {
- // Attempt self-derivation if it's running
- reqc := make(chan struct{}, 1)
- select {
- case w.deriveReq <- reqc:
- // Self-derivation request accepted, wait for it
- <-reqc
- default:
- // Self-derivation offline, throttled or busy, skip
- }
- // Return whatever account list we ended up with
- w.stateLock.RLock()
- defer w.stateLock.RUnlock()
-
- cpy := make([]accounts.Account, len(w.accounts))
- copy(cpy, w.accounts)
- return cpy
-}
-
-// selfDerive is an account derivation loop that upon request attempts to find
-// new non-zero accounts.
-func (w *ledgerWallet) selfDerive() {
- w.log.Debug("Ledger self-derivation started")
- defer w.log.Debug("Ledger self-derivation stopped")
-
- // Execute self-derivations until termination or error
- var (
- reqc chan struct{}
- errc chan error
- err error
- )
- for errc == nil && err == nil {
- // Wait until either derivation or termination is requested
- select {
- case errc = <-w.deriveQuit:
- // Termination requested
- continue
- case reqc = <-w.deriveReq:
- // Account discovery requested
- }
- // Derivation needs a chain and device access, skip if either unavailable
- w.stateLock.RLock()
- if w.device == nil || w.deriveChain == nil || w.offline() {
- w.stateLock.RUnlock()
- reqc <- struct{}{}
- continue
- }
- select {
- case <-w.commsLock:
- default:
- w.stateLock.RUnlock()
- reqc <- struct{}{}
- continue
- }
- // Device lock obtained, derive the next batch of accounts
- var (
- accs []accounts.Account
- paths []accounts.DerivationPath
-
- nextAddr = w.deriveNextAddr
- nextPath = w.deriveNextPath
-
- context = context.Background()
- )
- for empty := false; !empty; {
- // Retrieve the next derived Ethereum account
- if nextAddr == (common.Address{}) {
- if nextAddr, err = w.ledgerDerive(nextPath); err != nil {
- w.log.Warn("Ledger account derivation failed", "err", err)
- break
- }
- }
- // Check the account's status against the current chain state
- var (
- balance *big.Int
- nonce uint64
- )
- balance, err = w.deriveChain.BalanceAt(context, nextAddr, nil)
- if err != nil {
- w.log.Warn("Ledger balance retrieval failed", "err", err)
- break
- }
- nonce, err = w.deriveChain.NonceAt(context, nextAddr, nil)
- if err != nil {
- w.log.Warn("Ledger nonce retrieval failed", "err", err)
- break
- }
- // If the next account is empty, stop self-derivation, but add it nonetheless
- if balance.Sign() == 0 && nonce == 0 {
- empty = true
- }
- // We've just self-derived a new account, start tracking it locally
- path := make(accounts.DerivationPath, len(nextPath))
- copy(path[:], nextPath[:])
- paths = append(paths, path)
-
- account := accounts.Account{
- Address: nextAddr,
- URL: accounts.URL{Scheme: w.url.Scheme, Path: fmt.Sprintf("%s/%s", w.url.Path, path)},
- }
- accs = append(accs, account)
-
- // Display a log message to the user for new (or previously empty accounts)
- if _, known := w.paths[nextAddr]; !known || (!empty && nextAddr == w.deriveNextAddr) {
- w.log.Info("Ledger discovered new account", "address", nextAddr, "path", path, "balance", balance, "nonce", nonce)
- }
- // Fetch the next potential account
- if !empty {
- nextAddr = common.Address{}
- nextPath[len(nextPath)-1]++
- }
- }
- // Self derivation complete, release device lock
- w.commsLock <- struct{}{}
- w.stateLock.RUnlock()
-
- // Insert any accounts successfully derived
- w.stateLock.Lock()
- for i := 0; i < len(accs); i++ {
- if _, ok := w.paths[accs[i].Address]; !ok {
- w.accounts = append(w.accounts, accs[i])
- w.paths[accs[i].Address] = paths[i]
- }
- }
- // Shift the self-derivation forward
- // TODO(karalabe): don't overwrite changes from wallet.SelfDerive
- w.deriveNextAddr = nextAddr
- w.deriveNextPath = nextPath
- w.stateLock.Unlock()
-
- // Notify the user of termination and loop after a bit of time (to avoid trashing)
- reqc <- struct{}{}
- if err == nil {
- select {
- case errc = <-w.deriveQuit:
- // Termination requested, abort
- case <-time.After(selfDeriveThrottling):
- // Waited enough, willing to self-derive again
- }
- }
- }
- // In case of error, wait for termination
- if err != nil {
- w.log.Debug("Ledger self-derivation failed", "err", err)
- errc = <-w.deriveQuit
- }
- errc <- err
-}
-
-// Contains implements accounts.Wallet, returning whether a particular account is
-// or is not pinned into this Ledger instance. Although we could attempt to resolve
-// unpinned accounts, that would be an non-negligible hardware operation.
-func (w *ledgerWallet) Contains(account accounts.Account) bool {
- w.stateLock.RLock()
- defer w.stateLock.RUnlock()
-
- _, exists := w.paths[account.Address]
- return exists
-}
-
-// Derive implements accounts.Wallet, deriving a new account at the specific
-// derivation path. If pin is set to true, the account will be added to the list
-// of tracked accounts.
-func (w *ledgerWallet) Derive(path accounts.DerivationPath, pin bool) (accounts.Account, error) {
- // Try to derive the actual account and update its URL if successful
- w.stateLock.RLock() // Avoid device disappearing during derivation
-
- if w.device == nil || w.offline() {
- w.stateLock.RUnlock()
- return accounts.Account{}, accounts.ErrWalletClosed
- }
- <-w.commsLock // Avoid concurrent hardware access
- address, err := w.ledgerDerive(path)
- w.commsLock <- struct{}{}
-
- w.stateLock.RUnlock()
-
- // If an error occurred or no pinning was requested, return
- if err != nil {
- return accounts.Account{}, err
- }
- account := accounts.Account{
- Address: address,
- URL: accounts.URL{Scheme: w.url.Scheme, Path: fmt.Sprintf("%s/%s", w.url.Path, path)},
- }
- if !pin {
- return account, nil
- }
- // Pinning needs to modify the state
- w.stateLock.Lock()
- defer w.stateLock.Unlock()
-
- if _, ok := w.paths[address]; !ok {
- w.accounts = append(w.accounts, account)
- w.paths[address] = path
- }
- return account, nil
-}
-
-// SelfDerive implements accounts.Wallet, trying to discover accounts that the
-// user used previously (based on the chain state), but ones that he/she did not
-// explicitly pin to the wallet manually. To avoid chain head monitoring, self
-// derivation only runs during account listing (and even then throttled).
-func (w *ledgerWallet) SelfDerive(base accounts.DerivationPath, chain ethereum.ChainStateReader) {
- w.stateLock.Lock()
- defer w.stateLock.Unlock()
-
- w.deriveNextPath = make(accounts.DerivationPath, len(base))
- copy(w.deriveNextPath[:], base[:])
-
- w.deriveNextAddr = common.Address{}
- w.deriveChain = chain
-}
-
-// SignHash implements accounts.Wallet, however signing arbitrary data is not
-// supported for Ledger wallets, so this method will always return an error.
-func (w *ledgerWallet) SignHash(acc accounts.Account, hash []byte) ([]byte, error) {
- return nil, accounts.ErrNotSupported
-}
-
-// SignTx implements accounts.Wallet. It sends the transaction over to the Ledger
-// wallet to request a confirmation from the user. It returns either the signed
-// transaction or a failure if the user denied the transaction.
-//
-// Note, if the version of the Ethereum application running on the Ledger wallet is
-// too old to sign EIP-155 transactions, but such is requested nonetheless, an error
-// will be returned opposed to silently signing in Homestead mode.
-func (w *ledgerWallet) SignTx(account accounts.Account, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
- w.stateLock.RLock() // Comms have own mutex, this is for the state fields
- defer w.stateLock.RUnlock()
-
- // If the wallet is closed, or the Ethereum app doesn't run, abort
- if w.device == nil || w.offline() {
- return nil, accounts.ErrWalletClosed
- }
- // Make sure the requested account is contained within
- path, ok := w.paths[account.Address]
- if !ok {
- return nil, accounts.ErrUnknownAccount
- }
- // Ensure the wallet is capable of signing the given transaction
- if chainID != nil && w.version[0] <= 1 && w.version[1] <= 0 && w.version[2] <= 2 {
- return nil, fmt.Errorf("Ledger v%d.%d.%d doesn't support signing this transaction, please update to v1.0.3 at least", w.version[0], w.version[1], w.version[2])
- }
- // All infos gathered and metadata checks out, request signing
- <-w.commsLock
- defer func() { w.commsLock <- struct{}{} }()
-
- // Ensure the device isn't screwed with while user confirmation is pending
- // TODO(karalabe): remove if hotplug lands on Windows
- w.hub.commsLock.Lock()
- w.hub.commsPend++
- w.hub.commsLock.Unlock()
-
- defer func() {
- w.hub.commsLock.Lock()
- w.hub.commsPend--
- w.hub.commsLock.Unlock()
- }()
- return w.ledgerSign(path, account.Address, tx, chainID)
-}
-
-// SignHashWithPassphrase implements accounts.Wallet, however signing arbitrary
-// data is not supported for Ledger wallets, so this method will always return
-// an error.
-func (w *ledgerWallet) SignHashWithPassphrase(account accounts.Account, passphrase string, hash []byte) ([]byte, error) {
- return nil, accounts.ErrNotSupported
-}
-
-// SignTxWithPassphrase implements accounts.Wallet, attempting to sign the given
-// transaction with the given account using passphrase as extra authentication.
-// Since the Ledger does not support extra passphrases, it is silently ignored.
-func (w *ledgerWallet) SignTxWithPassphrase(account accounts.Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
- return w.SignTx(account, tx, chainID)
-}
-
-// ledgerVersion retrieves the current version of the Ethereum wallet app running
-// on the Ledger wallet.
-//
-// The version retrieval protocol is defined as follows:
-//
-// CLA | INS | P1 | P2 | Lc | Le
-// ----+-----+----+----+----+---
-// E0 | 06 | 00 | 00 | 00 | 04
-//
-// With no input data, and the output data being:
-//
-// Description | Length
-// ---------------------------------------------------+--------
-// Flags 01: arbitrary data signature enabled by user | 1 byte
-// Application major version | 1 byte
-// Application minor version | 1 byte
-// Application patch version | 1 byte
-func (w *ledgerWallet) ledgerVersion() ([3]byte, error) {
- // Send the request and wait for the response
- reply, err := w.ledgerExchange(ledgerOpGetConfiguration, 0, 0, nil)
- if err != nil {
- return [3]byte{}, err
- }
- if len(reply) != 4 {
- return [3]byte{}, errInvalidVersionReply
- }
- // Cache the version for future reference
- var version [3]byte
- copy(version[:], reply[1:])
- return version, nil
-}
-
-// ledgerDerive retrieves the currently active Ethereum address from a Ledger
-// wallet at the specified derivation path.
-//
-// The address derivation protocol is defined as follows:
-//
-// CLA | INS | P1 | P2 | Lc | Le
-// ----+-----+----+----+-----+---
-// E0 | 02 | 00 return address
-// 01 display address and confirm before returning
-// | 00: do not return the chain code
-// | 01: return the chain code
-// | var | 00
-//
-// Where the input data is:
-//
-// Description | Length
-// -------------------------------------------------+--------
-// Number of BIP 32 derivations to perform (max 10) | 1 byte
-// First derivation index (big endian) | 4 bytes
-// ... | 4 bytes
-// Last derivation index (big endian) | 4 bytes
-//
-// And the output data is:
-//
-// Description | Length
-// ------------------------+-------------------
-// Public Key length | 1 byte
-// Uncompressed Public Key | arbitrary
-// Ethereum address length | 1 byte
-// Ethereum address | 40 bytes hex ascii
-// Chain code if requested | 32 bytes
-func (w *ledgerWallet) ledgerDerive(derivationPath []uint32) (common.Address, error) {
- // Flatten the derivation path into the Ledger request
- path := make([]byte, 1+4*len(derivationPath))
- path[0] = byte(len(derivationPath))
- for i, component := range derivationPath {
- binary.BigEndian.PutUint32(path[1+4*i:], component)
- }
- // Send the request and wait for the response
- reply, err := w.ledgerExchange(ledgerOpRetrieveAddress, ledgerP1DirectlyFetchAddress, ledgerP2DiscardAddressChainCode, path)
- if err != nil {
- return common.Address{}, err
- }
- // Discard the public key, we don't need that for now
- if len(reply) < 1 || len(reply) < 1+int(reply[0]) {
- return common.Address{}, errors.New("reply lacks public key entry")
- }
- reply = reply[1+int(reply[0]):]
-
- // Extract the Ethereum hex address string
- if len(reply) < 1 || len(reply) < 1+int(reply[0]) {
- return common.Address{}, errors.New("reply lacks address entry")
- }
- hexstr := reply[1 : 1+int(reply[0])]
-
- // Decode the hex sting into an Ethereum address and return
- var address common.Address
- hex.Decode(address[:], hexstr)
- return address, nil
-}
-
-// ledgerSign sends the transaction to the Ledger wallet, and waits for the user
-// to confirm or deny the transaction.
-//
-// The transaction signing protocol is defined as follows:
-//
-// CLA | INS | P1 | P2 | Lc | Le
-// ----+-----+----+----+-----+---
-// E0 | 04 | 00: first transaction data block
-// 80: subsequent transaction data block
-// | 00 | variable | variable
-//
-// Where the input for the first transaction block (first 255 bytes) is:
-//
-// Description | Length
-// -------------------------------------------------+----------
-// Number of BIP 32 derivations to perform (max 10) | 1 byte
-// First derivation index (big endian) | 4 bytes
-// ... | 4 bytes
-// Last derivation index (big endian) | 4 bytes
-// RLP transaction chunk | arbitrary
-//
-// And the input for subsequent transaction blocks (first 255 bytes) are:
-//
-// Description | Length
-// ----------------------+----------
-// RLP transaction chunk | arbitrary
-//
-// And the output data is:
-//
-// Description | Length
-// ------------+---------
-// signature V | 1 byte
-// signature R | 32 bytes
-// signature S | 32 bytes
-func (w *ledgerWallet) ledgerSign(derivationPath []uint32, address common.Address, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
- // Flatten the derivation path into the Ledger request
- path := make([]byte, 1+4*len(derivationPath))
- path[0] = byte(len(derivationPath))
- for i, component := range derivationPath {
- 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 = w.ledgerExchange(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] - byte(chainID.Uint64()*2+35)
- }
- // 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 != address {
- return nil, fmt.Errorf("signer mismatch: expected %s, got %s", address.Hex(), sender.Hex())
- }
- return signed, nil
-}
-
-// ledgerExchange 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 (w *ledgerWallet) ledgerExchange(opcode ledgerOpcode, p1 ledgerParam1, p2 ledgerParam2, data []byte) ([]byte, error) {
- // Construct the message payload, possibly split into multiple chunks
- apdu := make([]byte, 2, 7+len(data))
-
- binary.BigEndian.PutUint16(apdu, uint16(5+len(data)))
- apdu = append(apdu, []byte{0xe0, byte(opcode), byte(p1), byte(p2), byte(len(data))}...)
- apdu = append(apdu, data...)
-
- // Stream all the chunks to the device
- header := []byte{0x01, 0x01, 0x05, 0x00, 0x00} // Channel ID and command tag appended
- chunk := make([]byte, 64)
- space := len(chunk) - len(header)
-
- for i := 0; len(apdu) > 0; i++ {
- // Construct the new message to stream
- chunk = append(chunk[:0], header...)
- binary.BigEndian.PutUint16(chunk[3:], uint16(i))
-
- if len(apdu) > space {
- chunk = append(chunk, apdu[:space]...)
- apdu = apdu[space:]
- } else {
- chunk = append(chunk, apdu...)
- apdu = nil
- }
- // Send over to the device
- w.log.Trace("Data chunk sent to the Ledger", "chunk", hexutil.Bytes(chunk))
- if _, err := w.device.Write(chunk); err != nil {
- return nil, err
- }
- }
- // Stream the reply back from the wallet in 64 byte chunks
- var reply []byte
- chunk = chunk[:64] // Yeah, we surely have enough space
- for {
- // Read the next chunk from the Ledger wallet
- if _, err := io.ReadFull(w.device, chunk); err != nil {
- return nil, err
- }
- w.log.Trace("Data chunk received from the Ledger", "chunk", hexutil.Bytes(chunk))
-
- // Make sure the transport header matches
- if chunk[0] != 0x01 || chunk[1] != 0x01 || chunk[2] != 0x05 {
- return nil, errReplyInvalidHeader
- }
- // If it's the first chunk, retrieve the total message length
- var payload []byte
-
- if chunk[3] == 0x00 && chunk[4] == 0x00 {
- reply = make([]byte, 0, int(binary.BigEndian.Uint16(chunk[5:7])))
- payload = chunk[7:]
- } else {
- payload = chunk[5:]
- }
- // Append to the reply and stop when filled up
- if left := cap(reply) - len(reply); left > len(payload) {
- reply = append(reply, payload...)
- } else {
- reply = append(reply, payload[:left]...)
- break
- }
- }
- return reply[:len(reply)-2], nil
-}
diff --git a/accounts/usbwallet/trezor.go b/accounts/usbwallet/trezor.go
new file mode 100644
index 0000000000000000000000000000000000000000..159cb2ea97025b6dbd0be340a40d463687ef11fe
--- /dev/null
+++ b/accounts/usbwallet/trezor.go
@@ -0,0 +1,330 @@
+// 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/>.
+
+// This file contains the implementation for interacting with the Trezor hardware
+// wallets. The wire protocol spec can be found on the SatoshiLabs website:
+// https://doc.satoshilabs.com/trezor-tech/api-protobuf.html
+
+package usbwallet
+
+import (
+ "encoding/binary"
+ "errors"
+ "fmt"
+ "io"
+ "math/big"
+
+ "github.com/ethereum/go-ethereum/accounts"
+ "github.com/ethereum/go-ethereum/accounts/usbwallet/internal/trezor"
+ "github.com/ethereum/go-ethereum/common"
+ "github.com/ethereum/go-ethereum/common/hexutil"
+ "github.com/ethereum/go-ethereum/core/types"
+ "github.com/ethereum/go-ethereum/log"
+ "github.com/golang/protobuf/proto"
+)
+
+// ErrTrezorPINNeeded is returned if opening the trezor requires a PIN code. In
+// this case, the calling application should display a pinpad and send back the
+// encoded passphrase.
+var ErrTrezorPINNeeded = errors.New("trezor: pin needed")
+
+// errTrezorReplyInvalidHeader is the error message returned by a Trezor data exchange
+// if the device replies with a mismatching header. This usually means the device
+// is in browser mode.
+var errTrezorReplyInvalidHeader = errors.New("trezor: invalid reply header")
+
+// trezorDriver implements the communication with a Trezor hardware wallet.
+type trezorDriver struct {
+ device io.ReadWriter // USB device connection to communicate through
+ version [3]uint32 // Current version of the Trezor firmware
+ label string // Current textual label of the Trezor device
+ pinwait bool // Flags whether the device is waiting for PIN entry
+ failure error // Any failure that would make the device unusable
+ log log.Logger // Contextual logger to tag the trezor with its id
+}
+
+// newTrezorDriver creates a new instance of a Trezor USB protocol driver.
+func newTrezorDriver(logger log.Logger) driver {
+ return &trezorDriver{
+ log: logger,
+ }
+}
+
+// Status implements accounts.Wallet, always whether the Trezor is opened, closed
+// or whether the Ethereum app was not started on it.
+func (w *trezorDriver) Status() (string, error) {
+ if w.failure != nil {
+ return fmt.Sprintf("Failed: %v", w.failure), w.failure
+ }
+ if w.device == nil {
+ return "Closed", w.failure
+ }
+ if w.pinwait {
+ return fmt.Sprintf("Trezor v%d.%d.%d '%s' waiting for PIN", w.version[0], w.version[1], w.version[2], w.label), w.failure
+ }
+ return fmt.Sprintf("Trezor v%d.%d.%d '%s' online", w.version[0], w.version[1], w.version[2], w.label), w.failure
+}
+
+// Open implements usbwallet.driver, attempting to initialize the connection to
+// the Trezor hardware wallet. Initializing the Trezor is a two phase operation:
+// * The first phase is to initialize the connection and read the wallet's
+// features. This phase is invoked is the provided passphrase is empty. The
+// device will display the pinpad as a result and will return an appropriate
+// error to notify the user that a second open phase is needed.
+// * The second phase is to unlock access to the Trezor, which is done by the
+// user actually providing a passphrase mapping a keyboard keypad to the pin
+// number of the user (shuffled according to the pinpad displayed).
+func (w *trezorDriver) Open(device io.ReadWriter, passphrase string) error {
+ w.device, w.failure = device, nil
+
+ // If phase 1 is requested, init the connection and wait for user callback
+ if passphrase == "" {
+ // If we're already waiting for a PIN entry, insta-return
+ if w.pinwait {
+ return ErrTrezorPINNeeded
+ }
+ // Initialize a connection to the device
+ features := new(trezor.Features)
+ if _, err := w.trezorExchange(&trezor.Initialize{}, features); err != nil {
+ return err
+ }
+ w.version = [3]uint32{features.GetMajorVersion(), features.GetMinorVersion(), features.GetPatchVersion()}
+ w.label = features.GetLabel()
+
+ // Do a manual ping, forcing the device to ask for its PIN
+ askPin := true
+ res, err := w.trezorExchange(&trezor.Ping{PinProtection: &askPin}, new(trezor.PinMatrixRequest), new(trezor.Success))
+ if err != nil {
+ return err
+ }
+ // Only return the PIN request if the device wasn't unlocked until now
+ if res == 1 {
+ return nil // Device responded with trezor.Success
+ }
+ w.pinwait = true
+ return ErrTrezorPINNeeded
+ }
+ // Phase 2 requested with actual PIN entry
+ w.pinwait = false
+
+ if _, err := w.trezorExchange(&trezor.PinMatrixAck{Pin: &passphrase}, new(trezor.Success)); err != nil {
+ w.failure = err
+ return err
+ }
+ return nil
+}
+
+// Close implements usbwallet.driver, cleaning up and metadata maintained within
+// the Trezor driver.
+func (w *trezorDriver) Close() error {
+ w.version, w.label, w.pinwait = [3]uint32{}, "", false
+ return nil
+}
+
+// Heartbeat implements usbwallet.driver, performing a sanity check against the
+// Trezor to see if it's still online.
+func (w *trezorDriver) Heartbeat() error {
+ if _, err := w.trezorExchange(&trezor.Ping{}, new(trezor.Success)); err != nil {
+ w.failure = err
+ return err
+ }
+ return nil
+}
+
+// Derive implements usbwallet.driver, sending a derivation request to the Trezor
+// and returning the Ethereum address located on that derivation path.
+func (w *trezorDriver) Derive(path accounts.DerivationPath) (common.Address, error) {
+ return w.trezorDerive(path)
+}
+
+// SignTx implements usbwallet.driver, sending the transaction to the Trezor and
+// waiting for the user to confirm or deny the transaction.
+func (w *trezorDriver) SignTx(path accounts.DerivationPath, tx *types.Transaction, chainID *big.Int) (common.Address, *types.Transaction, error) {
+ if w.device == nil {
+ return common.Address{}, nil, accounts.ErrWalletClosed
+ }
+ return w.trezorSign(path, tx, chainID)
+}
+
+// trezorDerive sends a derivation request to the Trezor device and returns the
+// Ethereum address located on that path.
+func (w *trezorDriver) trezorDerive(derivationPath []uint32) (common.Address, error) {
+ address := new(trezor.EthereumAddress)
+ if _, err := w.trezorExchange(&trezor.EthereumGetAddress{AddressN: derivationPath}, address); err != nil {
+ return common.Address{}, err
+ }
+ return common.BytesToAddress(address.GetAddress()), nil
+}
+
+// trezorSign sends the transaction to the Trezor wallet, and waits for the user
+// to confirm or deny the transaction.
+func (w *trezorDriver) trezorSign(derivationPath []uint32, tx *types.Transaction, chainID *big.Int) (common.Address, *types.Transaction, error) {
+ // Create the transaction initiation message
+ data := tx.Data()
+ length := uint32(len(data))
+
+ request := &trezor.EthereumSignTx{
+ AddressN: derivationPath,
+ Nonce: new(big.Int).SetUint64(tx.Nonce()).Bytes(),
+ GasPrice: tx.GasPrice().Bytes(),
+ GasLimit: tx.Gas().Bytes(),
+ Value: tx.Value().Bytes(),
+ DataLength: &length,
+ }
+ if to := tx.To(); to != nil {
+ request.To = (*to)[:] // Non contract deploy, set recipient explicitly
+ }
+ if length > 1024 { // Send the data chunked if that was requested
+ request.DataInitialChunk, data = data[:1024], data[1024:]
+ } else {
+ request.DataInitialChunk, data = data, nil
+ }
+ if chainID != nil { // EIP-155 transaction, set chain ID explicitly (only 32 bit is supported!?)
+ id := uint32(chainID.Int64())
+ request.ChainId = &id
+ }
+ // Send the initiation message and stream content until a signature is returned
+ response := new(trezor.EthereumTxRequest)
+ if _, err := w.trezorExchange(request, response); err != nil {
+ return common.Address{}, nil, err
+ }
+ for response.DataLength != nil && int(*response.DataLength) <= len(data) {
+ chunk := data[:*response.DataLength]
+ data = data[*response.DataLength:]
+
+ if _, err := w.trezorExchange(&trezor.EthereumTxAck{DataChunk: chunk}, response); err != nil {
+ return common.Address{}, nil, err
+ }
+ }
+ // Extract the Ethereum signature and do a sanity validation
+ if len(response.GetSignatureR()) == 0 || len(response.GetSignatureS()) == 0 || response.GetSignatureV() == 0 {
+ return common.Address{}, nil, errors.New("reply lacks signature")
+ }
+ signature := append(append(response.GetSignatureR(), response.GetSignatureS()...), byte(response.GetSignatureV()))
+
+ // 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] - byte(chainID.Uint64()*2+35)
+ }
+ // Inject the final signature into the transaction and sanity check the sender
+ signed, err := tx.WithSignature(signer, signature)
+ if err != nil {
+ return common.Address{}, nil, err
+ }
+ sender, err := types.Sender(signer, signed)
+ if err != nil {
+ return common.Address{}, nil, err
+ }
+ return sender, signed, nil
+}
+
+// trezorExchange performs a data exchange with the Trezor wallet, sending it a
+// message and retrieving the response. If multiple responses are possible, the
+// method will also return the index of the destination object used.
+func (w *trezorDriver) trezorExchange(req proto.Message, results ...proto.Message) (int, error) {
+ // Construct the original message payload to chunk up
+ data, err := proto.Marshal(req)
+ if err != nil {
+ return 0, err
+ }
+ payload := make([]byte, 8+len(data))
+ copy(payload, []byte{0x23, 0x23})
+ binary.BigEndian.PutUint16(payload[2:], trezor.Type(req))
+ binary.BigEndian.PutUint32(payload[4:], uint32(len(data)))
+ copy(payload[8:], data)
+
+ // Stream all the chunks to the device
+ chunk := make([]byte, 64)
+ chunk[0] = 0x3f // Report ID magic number
+
+ for len(payload) > 0 {
+ // Construct the new message to stream, padding with zeroes if needed
+ if len(payload) > 63 {
+ copy(chunk[1:], payload[:63])
+ payload = payload[63:]
+ } else {
+ copy(chunk[1:], payload)
+ copy(chunk[1+len(payload):], make([]byte, 63-len(payload)))
+ payload = nil
+ }
+ // Send over to the device
+ w.log.Trace("Data chunk sent to the Trezor", "chunk", hexutil.Bytes(chunk))
+ if _, err := w.device.Write(chunk); err != nil {
+ return 0, err
+ }
+ }
+ // Stream the reply back from the wallet in 64 byte chunks
+ var (
+ kind uint16
+ reply []byte
+ )
+ for {
+ // Read the next chunk from the Trezor wallet
+ if _, err := io.ReadFull(w.device, chunk); err != nil {
+ return 0, err
+ }
+ w.log.Trace("Data chunk received from the Trezor", "chunk", hexutil.Bytes(chunk))
+
+ // Make sure the transport header matches
+ if chunk[0] != 0x3f || (len(reply) == 0 && (chunk[1] != 0x23 || chunk[2] != 0x23)) {
+ return 0, errTrezorReplyInvalidHeader
+ }
+ // If it's the first chunk, retrieve the reply message type and total message length
+ var payload []byte
+
+ if len(reply) == 0 {
+ kind = binary.BigEndian.Uint16(chunk[3:5])
+ reply = make([]byte, 0, int(binary.BigEndian.Uint32(chunk[5:9])))
+ payload = chunk[9:]
+ } else {
+ payload = chunk[1:]
+ }
+ // Append to the reply and stop when filled up
+ if left := cap(reply) - len(reply); left > len(payload) {
+ reply = append(reply, payload...)
+ } else {
+ reply = append(reply, payload[:left]...)
+ break
+ }
+ }
+ // Try to parse the reply into the requested reply message
+ if kind == uint16(trezor.MessageType_MessageType_Failure) {
+ // Trezor returned a failure, extract and return the message
+ failure := new(trezor.Failure)
+ if err := proto.Unmarshal(reply, failure); err != nil {
+ return 0, err
+ }
+ return 0, errors.New("trezor: " + failure.GetMessage())
+ }
+ if kind == uint16(trezor.MessageType_MessageType_ButtonRequest) {
+ // Trezor is waiting for user confirmation, ack and wait for the next message
+ return w.trezorExchange(&trezor.ButtonAck{}, results...)
+ }
+ for i, res := range results {
+ if trezor.Type(res) == kind {
+ return i, proto.Unmarshal(reply, res)
+ }
+ }
+ expected := make([]string, len(results))
+ for i, res := range results {
+ expected[i] = trezor.Name(trezor.Type(res))
+ }
+ return 0, fmt.Errorf("trezor: expected reply types %s, got %s", expected, trezor.Name(kind))
+}
diff --git a/accounts/usbwallet/trezor_hub.go b/accounts/usbwallet/trezor_hub.go
deleted file mode 100644
index 5681a55c746fb5cc0d4856cde2c7ac4ef6ac8d37..0000000000000000000000000000000000000000
--- a/accounts/usbwallet/trezor_hub.go
+++ /dev/null
@@ -1,210 +0,0 @@
-// 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
-
-import (
- "errors"
- "runtime"
- "sync"
- "time"
-
- "github.com/ethereum/go-ethereum/accounts"
- "github.com/ethereum/go-ethereum/event"
- "github.com/ethereum/go-ethereum/log"
- "github.com/karalabe/hid"
-)
-
-// TrezorScheme is the protocol scheme prefixing account and wallet URLs.
-var TrezorScheme = "trezor"
-
-// trezorVendorID is the USB vendor ID for SatoshiLabs.
-var trezorVendorID = uint16(0x534c)
-
-// trezorDeviceID is the USB device ID for the Trezor 1.
-var trezorDeviceID = uint16(0x0001)
-
-// Maximum time between wallet refreshes (if USB hotplug notifications don't work).
-const trezorRefreshCycle = time.Second
-
-// Minimum time between wallet refreshes to avoid USB trashing.
-const trezorRefreshThrottling = 500 * time.Millisecond
-
-// TrezorHub is a accounts.Backend that can find and handle Trezor hardware wallets.
-type TrezorHub struct {
- refreshed time.Time // Time instance when the list of wallets was last refreshed
- wallets []accounts.Wallet // List of Trezor devices currently tracking
- updateFeed event.Feed // Event feed to notify wallet additions/removals
- updateScope event.SubscriptionScope // Subscription scope tracking current live listeners
- updating bool // Whether the event notification loop is running
-
- quit chan chan error
-
- stateLock sync.RWMutex // Protects the internals of the hub from racey access
-
- // TODO(karalabe): remove if hotplug lands on Windows
- commsPend int // Number of operations blocking enumeration
- commsLock sync.Mutex // Lock protecting the pending counter and enumeration
-}
-
-// NewTrezorHub creates a new hardware wallet manager for Trezor devices.
-func NewTrezorHub() (*TrezorHub, error) {
- if !hid.Supported() {
- return nil, errors.New("unsupported platform")
- }
- hub := &TrezorHub{
- quit: make(chan chan error),
- }
- hub.refreshWallets()
- return hub, nil
-}
-
-// Wallets implements accounts.Backend, returning all the currently tracked USB
-// devices that appear to be Trezor hardware wallets.
-func (hub *TrezorHub) Wallets() []accounts.Wallet {
- // Make sure the list of wallets is up to date
- hub.refreshWallets()
-
- hub.stateLock.RLock()
- defer hub.stateLock.RUnlock()
-
- cpy := make([]accounts.Wallet, len(hub.wallets))
- copy(cpy, hub.wallets)
- return cpy
-}
-
-// refreshWallets scans the USB devices attached to the machine and updates the
-// list of wallets based on the found devices.
-func (hub *TrezorHub) refreshWallets() {
- // Don't scan the USB like crazy it the user fetches wallets in a loop
- hub.stateLock.RLock()
- elapsed := time.Since(hub.refreshed)
- hub.stateLock.RUnlock()
-
- if elapsed < trezorRefreshThrottling {
- return
- }
- // Retrieve the current list of Trezor devices
- var trezors []hid.DeviceInfo
-
- if runtime.GOOS == "linux" {
- // hidapi on Linux opens the device during enumeration to retrieve some infos,
- // breaking the Trezor protocol if that is waiting for user confirmation. This
- // is a bug acknowledged at Trezor, but it won't be fixed on old devices so we
- // need to prevent concurrent comms ourselves. The more elegant solution would
- // be to ditch enumeration in favor of hutplug events, but that don't work yet
- // on Windows so if we need to hack it anyway, this is more elegant for now.
- hub.commsLock.Lock()
- if hub.commsPend > 0 { // A confirmation is pending, don't refresh
- hub.commsLock.Unlock()
- return
- }
- }
- for _, info := range hid.Enumerate(trezorVendorID, trezorDeviceID) {
- if info.Interface == 0 { // interface #1 is the debug link, skip it
- trezors = append(trezors, info)
- }
- }
- if runtime.GOOS == "linux" {
- // See rationale before the enumeration why this is needed and only on Linux.
- hub.commsLock.Unlock()
- }
- // Transform the current list of wallets into the new one
- hub.stateLock.Lock()
-
- wallets := make([]accounts.Wallet, 0, len(trezors))
- events := []accounts.WalletEvent{}
-
- for _, trezor := range trezors {
- url := accounts.URL{Scheme: TrezorScheme, Path: trezor.Path}
-
- // Drop wallets in front of the next device or those that failed for some reason
- for len(hub.wallets) > 0 && (hub.wallets[0].URL().Cmp(url) < 0 || hub.wallets[0].(*trezorWallet).failed()) {
- events = append(events, accounts.WalletEvent{Wallet: hub.wallets[0], Kind: accounts.WalletDropped})
- hub.wallets = hub.wallets[1:]
- }
- // If there are no more wallets or the device is before the next, wrap new wallet
- if len(hub.wallets) == 0 || hub.wallets[0].URL().Cmp(url) > 0 {
- wallet := &trezorWallet{hub: hub, url: &url, info: trezor, log: log.New("url", url)}
-
- events = append(events, accounts.WalletEvent{Wallet: wallet, Kind: accounts.WalletArrived})
- wallets = append(wallets, wallet)
- continue
- }
- // If the device is the same as the first wallet, keep it
- if hub.wallets[0].URL().Cmp(url) == 0 {
- wallets = append(wallets, hub.wallets[0])
- hub.wallets = hub.wallets[1:]
- continue
- }
- }
- // Drop any leftover wallets and set the new batch
- for _, wallet := range hub.wallets {
- events = append(events, accounts.WalletEvent{Wallet: wallet, Kind: accounts.WalletDropped})
- }
- hub.refreshed = time.Now()
- hub.wallets = wallets
- hub.stateLock.Unlock()
-
- // Fire all wallet events and return
- for _, event := range events {
- hub.updateFeed.Send(event)
- }
-}
-
-// Subscribe implements accounts.Backend, creating an async subscription to
-// receive notifications on the addition or removal of Trezor wallets.
-func (hub *TrezorHub) Subscribe(sink chan<- accounts.WalletEvent) event.Subscription {
- // We need the mutex to reliably start/stop the update loop
- hub.stateLock.Lock()
- defer hub.stateLock.Unlock()
-
- // Subscribe the caller and track the subscriber count
- sub := hub.updateScope.Track(hub.updateFeed.Subscribe(sink))
-
- // Subscribers require an active notification loop, start it
- if !hub.updating {
- hub.updating = true
- go hub.updater()
- }
- return sub
-}
-
-// updater is responsible for maintaining an up-to-date list of wallets stored in
-// the keystore, and for firing wallet addition/removal events. It listens for
-// account change events from the underlying account cache, and also periodically
-// forces a manual refresh (only triggers for systems where the filesystem notifier
-// is not running).
-func (hub *TrezorHub) updater() {
- for {
- // Wait for a USB hotplug event (not supported yet) or a refresh timeout
- select {
- //case <-hub.changes: // reenable on hutplug implementation
- case <-time.After(trezorRefreshCycle):
- }
- // Run the wallet refresher
- hub.refreshWallets()
-
- // If all our subscribers left, stop the updater
- hub.stateLock.Lock()
- if hub.updateScope.Count() == 0 {
- hub.updating = false
- hub.stateLock.Unlock()
- return
- }
- hub.stateLock.Unlock()
- }
-}
diff --git a/accounts/usbwallet/trezor_wallet.go b/accounts/usbwallet/trezor_wallet.go
deleted file mode 100644
index 779119192074691b97b265822699a511a5c3f4de..0000000000000000000000000000000000000000
--- a/accounts/usbwallet/trezor_wallet.go
+++ /dev/null
@@ -1,761 +0,0 @@
-// 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/>.
-
-// This file contains the implementation for interacting with the Trezor hardware
-// wallets. The wire protocol spec can be found on the SatoshiLabs website:
-// https://doc.satoshilabs.com/trezor-tech/api-protobuf.html
-
-package usbwallet
-
-import (
- "context"
- "encoding/binary"
- "errors"
- "fmt"
- "io"
- "math/big"
- "sync"
- "time"
-
- ethereum "github.com/ethereum/go-ethereum"
- "github.com/ethereum/go-ethereum/accounts"
- "github.com/ethereum/go-ethereum/accounts/usbwallet/internal/trezor"
- "github.com/ethereum/go-ethereum/common"
- "github.com/ethereum/go-ethereum/common/hexutil"
- "github.com/ethereum/go-ethereum/core/types"
- "github.com/ethereum/go-ethereum/log"
- "github.com/golang/protobuf/proto"
- "github.com/karalabe/hid"
-)
-
-// ErrTrezorPINNeeded is returned if opening the trezor requires a PIN code. In
-// this case, the calling application should display a pinpad and send back the
-// encoded passphrase.
-var ErrTrezorPINNeeded = errors.New("trezor: pin needed")
-
-// trezorWallet represents a live USB Trezor hardware wallet.
-type trezorWallet struct {
- hub *TrezorHub // USB hub the device originates from (TODO(karalabe): remove if hotplug lands on Windows)
- url *accounts.URL // Textual URL uniquely identifying this wallet
-
- info hid.DeviceInfo // Known USB device infos about the wallet
- device *hid.Device // USB device advertising itself as a Trezor wallet
- failure error // Any failure that would make the device unusable
-
- version [3]uint32 // Current version of the Trezor formware (zero if app is offline)
- label string // Current textual label of the Trezor device
- pinwait bool // Flags whether the device is waiting for PIN entry
- accounts []accounts.Account // List of derive accounts pinned on the Trezor
- paths map[common.Address]accounts.DerivationPath // Known derivation paths for signing operations
-
- deriveNextPath accounts.DerivationPath // Next derivation path for account auto-discovery
- deriveNextAddr common.Address // Next derived account address for auto-discovery
- deriveChain ethereum.ChainStateReader // Blockchain state reader to discover used account with
- deriveReq chan chan struct{} // Channel to request a self-derivation on
- deriveQuit chan chan error // Channel to terminate the self-deriver with
-
- healthQuit chan chan error
-
- // Locking a hardware wallet is a bit special. Since hardware devices are lower
- // performing, any communication with them might take a non negligible amount of
- // time. Worse still, waiting for user confirmation can take arbitrarily long,
- // but exclusive communication must be upheld during. Locking the entire wallet
- // in the mean time however would stall any parts of the system that don't want
- // to communicate, just read some state (e.g. list the accounts).
- //
- // As such, a hardware wallet needs two locks to function correctly. A state
- // lock can be used to protect the wallet's software-side internal state, which
- // must not be held exlusively during hardware communication. A communication
- // lock can be used to achieve exclusive access to the device itself, this one
- // however should allow "skipping" waiting for operations that might want to
- // use the device, but can live without too (e.g. account self-derivation).
- //
- // Since we have two locks, it's important to know how to properly use them:
- // - Communication requires the `device` to not change, so obtaining the
- // commsLock should be done after having a stateLock.
- // - Communication must not disable read access to the wallet state, so it
- // must only ever hold a *read* lock to stateLock.
- commsLock chan struct{} // Mutex (buf=1) for the USB comms without keeping the state locked
- stateLock sync.RWMutex // Protects read and write access to the wallet struct fields
-
- log log.Logger // Contextual logger to tag the trezor with its id
-}
-
-// URL implements accounts.Wallet, returning the URL of the Trezor device.
-func (w *trezorWallet) URL() accounts.URL {
- return *w.url // Immutable, no need for a lock
-}
-
-// Status implements accounts.Wallet, always whether the Trezor is opened, closed
-// or whether the Ethereum app was not started on it.
-func (w *trezorWallet) Status() string {
- w.stateLock.RLock() // No device communication, state lock is enough
- defer w.stateLock.RUnlock()
-
- if w.failure != nil {
- return fmt.Sprintf("Failed: %v", w.failure)
- }
- if w.device == nil {
- return "Closed"
- }
- if w.pinwait {
- return fmt.Sprintf("Trezor v%d.%d.%d '%s' waiting for PIN", w.version[0], w.version[1], w.version[2], w.label)
- }
- return fmt.Sprintf("Trezor v%d.%d.%d '%s' online", w.version[0], w.version[1], w.version[2], w.label)
-}
-
-// failed returns if the USB device wrapped by the wallet failed for some reason.
-// This is used by the device scanner to report failed wallets as departed.
-//
-// The method assumes that the state lock is *not* held!
-func (w *trezorWallet) failed() bool {
- w.stateLock.RLock() // No device communication, state lock is enough
- defer w.stateLock.RUnlock()
-
- return w.failure != nil
-}
-
-// Open implements accounts.Wallet, attempting to open a USB connection to the
-// Trezor hardware wallet. Connecting to the Trezor is a two phase operation:
-// * The first phase is to establish the USB connection, initialize it and read
-// the wallet's features. This phase is invoked is the provided passphrase is
-// empty. The device will display the pinpad as a result and will return an
-// appropriate error to notify the user that a second open phase is needed.
-// * The second phase is to unlock access to the Trezor, which is done by the
-// user actually providing a passphrase mapping a keyboard keypad to the pin
-// number of the user (shuffled according to the pinpad displayed).
-func (w *trezorWallet) Open(passphrase string) error {
- w.stateLock.Lock() // State lock is enough since there's no connection yet at this point
- defer w.stateLock.Unlock()
-
- // If phase 1 is requested, init the connection and wait for user callback
- if passphrase == "" {
- // If we're already waiting for a PIN entry, insta-return
- if w.pinwait {
- return ErrTrezorPINNeeded
- }
- // Initialize a connection to the device
- if err := w.openInit(); err != nil {
- return err
- }
- // Do a manual ping, forcing the device to ask for its PIN
- askPin, pinRequest := true, new(trezor.PinMatrixRequest)
- if err := w.trezorExchange(&trezor.Ping{PinProtection: &askPin}, pinRequest); err != nil {
- return err
- }
- w.pinwait = true
-
- return ErrTrezorPINNeeded
- }
- // Phase 2 requested with actual PIN entry
- w.pinwait = false
-
- success := new(trezor.Success)
- if err := w.trezorExchange(&trezor.PinMatrixAck{Pin: &passphrase}, success); err != nil {
- w.failure = err
- return err
- }
- go w.hub.updateFeed.Send(accounts.WalletEvent{Wallet: w, Kind: accounts.WalletOpened})
-
- // Trezor unlocked, start the heartbeat cycle and account derivation
- w.paths = make(map[common.Address]accounts.DerivationPath)
-
- w.deriveReq = make(chan chan struct{})
- w.deriveQuit = make(chan chan error)
- w.healthQuit = make(chan chan error)
-
- defer func() {
- go w.heartbeat()
- go w.selfDerive()
- }()
- return nil
-}
-
-// openInit is the first phase of a Trezor opening mechanism which initializes
-// device connection and requests the device to display the pinpad.
-func (w *trezorWallet) openInit() error {
- // If the wallet was already opened, don't try to phase-1 open again
- if w.device != nil {
- return accounts.ErrWalletAlreadyOpen
- }
- // Otherwise iterate over all USB devices and find this again (no way to directly do this)
- device, err := w.info.Open()
- if err != nil {
- return err
- }
- // Wallet successfully connected to, init the connection and start the heartbeat
- w.device = device
- w.commsLock = make(chan struct{}, 1)
- w.commsLock <- struct{}{} // Enable lock
-
- // Retrieve the Trezor's version number and user label
- features := new(trezor.Features)
- if err := w.trezorExchange(&trezor.Initialize{}, features); err != nil {
- return err
- }
- w.version = [3]uint32{features.GetMajorVersion(), features.GetMinorVersion(), features.GetPatchVersion()}
- w.label = features.GetLabel()
-
- return nil
-}
-
-// heartbeat is a health check loop for the Trezor wallets to periodically verify
-// whether they are still present or if they malfunctioned. It is needed because:
-// - libusb on Windows doesn't support hotplug, so we can't detect USB unplugs
-func (w *trezorWallet) heartbeat() {
- w.log.Debug("Trezor health-check started")
- defer w.log.Debug("Trezor health-check stopped")
-
- // Execute heartbeat checks until termination or error
- var (
- errc chan error
- err error
- )
- for errc == nil && err == nil {
- // Wait until termination is requested or the heartbeat cycle arrives
- select {
- case errc = <-w.healthQuit:
- // Termination requested
- continue
- case <-time.After(heartbeatCycle):
- // Heartbeat time
- }
- // Execute a tiny data exchange to see responsiveness
- w.stateLock.RLock()
- if w.device == nil {
- // Terminated while waiting for the lock
- w.stateLock.RUnlock()
- continue
- }
- <-w.commsLock // Don't lock state while executing ping
-
- success := new(trezor.Success)
- err = w.trezorExchange(&trezor.Ping{}, success)
-
- w.commsLock <- struct{}{}
- w.stateLock.RUnlock()
-
- if err != nil {
- w.stateLock.Lock() // Lock state to tear the wallet down
- w.failure = err
- w.close()
- w.stateLock.Unlock()
- }
- // Ignore non hardware related errors
- err = nil
- }
- // In case of error, wait for termination
- if err != nil {
- w.log.Debug("Trezor health-check failed", "err", err)
- errc = <-w.healthQuit
- }
- errc <- err
-}
-
-// Close implements accounts.Wallet, closing the USB connection to the Trezor.
-func (w *trezorWallet) Close() error {
- // Ensure the wallet was opened
- w.stateLock.RLock()
- hQuit, dQuit := w.healthQuit, w.deriveQuit
- w.stateLock.RUnlock()
-
- // Terminate the health checks
- var herr error
- if hQuit != nil {
- errc := make(chan error)
- hQuit <- errc
- herr = <-errc // Save for later, we *must* close the USB
- }
- // Terminate the self-derivations
- var derr error
- if dQuit != nil {
- errc := make(chan error)
- dQuit <- errc
- derr = <-errc // Save for later, we *must* close the USB
- }
- // Terminate the device connection
- w.stateLock.Lock()
- defer w.stateLock.Unlock()
-
- w.healthQuit = nil
- w.deriveQuit = nil
- w.deriveReq = nil
-
- if err := w.close(); err != nil {
- return err
- }
- if herr != nil {
- return herr
- }
- return derr
-}
-
-// close is the internal wallet closer that terminates the USB connection and
-// resets all the fields to their defaults.
-//
-// Note, close assumes the state lock is held!
-func (w *trezorWallet) close() error {
- // Allow duplicate closes, especially for health-check failures
- if w.device == nil {
- return nil
- }
- // Close the device, clear everything, then return
- w.device.Close()
- w.device = nil
-
- w.label, w.version = "", [3]uint32{}
- w.accounts, w.paths = nil, nil
-
- return nil
-}
-
-// Accounts implements accounts.Wallet, returning the list of accounts pinned to
-// the Trezor hardware wallet. If self-derivation was enabled, the account list
-// is periodically expanded based on current chain state.
-func (w *trezorWallet) Accounts() []accounts.Account {
- // Attempt self-derivation if it's running
- reqc := make(chan struct{}, 1)
- select {
- case w.deriveReq <- reqc:
- // Self-derivation request accepted, wait for it
- <-reqc
- default:
- // Self-derivation offline, throttled or busy, skip
- }
- // Return whatever account list we ended up with
- w.stateLock.RLock()
- defer w.stateLock.RUnlock()
-
- cpy := make([]accounts.Account, len(w.accounts))
- copy(cpy, w.accounts)
- return cpy
-}
-
-// selfDerive is an account derivation loop that upon request attempts to find
-// new non-zero accounts.
-func (w *trezorWallet) selfDerive() {
- w.log.Debug("Trezor self-derivation started")
- defer w.log.Debug("Trezor self-derivation stopped")
-
- // Execute self-derivations until termination or error
- var (
- reqc chan struct{}
- errc chan error
- err error
- )
- for errc == nil && err == nil {
- // Wait until either derivation or termination is requested
- select {
- case errc = <-w.deriveQuit:
- // Termination requested
- continue
- case reqc = <-w.deriveReq:
- // Account discovery requested
- }
- // Derivation needs a chain and device access, skip if either unavailable
- w.stateLock.RLock()
- if w.device == nil || w.deriveChain == nil {
- w.stateLock.RUnlock()
- reqc <- struct{}{}
- continue
- }
- select {
- case <-w.commsLock:
- default:
- w.stateLock.RUnlock()
- reqc <- struct{}{}
- continue
- }
- // Device lock obtained, derive the next batch of accounts
- var (
- accs []accounts.Account
- paths []accounts.DerivationPath
-
- nextAddr = w.deriveNextAddr
- nextPath = w.deriveNextPath
-
- context = context.Background()
- )
- for empty := false; !empty; {
- // Retrieve the next derived Ethereum account
- if nextAddr == (common.Address{}) {
- if nextAddr, err = w.trezorDerive(nextPath); err != nil {
- w.log.Warn("Trezor account derivation failed", "err", err)
- break
- }
- }
- // Check the account's status against the current chain state
- var (
- balance *big.Int
- nonce uint64
- )
- balance, err = w.deriveChain.BalanceAt(context, nextAddr, nil)
- if err != nil {
- w.log.Warn("Trezor balance retrieval failed", "err", err)
- break
- }
- nonce, err = w.deriveChain.NonceAt(context, nextAddr, nil)
- if err != nil {
- w.log.Warn("Trezor nonce retrieval failed", "err", err)
- break
- }
- // If the next account is empty, stop self-derivation, but add it nonetheless
- if balance.Sign() == 0 && nonce == 0 {
- empty = true
- }
- // We've just self-derived a new account, start tracking it locally
- path := make(accounts.DerivationPath, len(nextPath))
- copy(path[:], nextPath[:])
- paths = append(paths, path)
-
- account := accounts.Account{
- Address: nextAddr,
- URL: accounts.URL{Scheme: w.url.Scheme, Path: fmt.Sprintf("%s/%s", w.url.Path, path)},
- }
- accs = append(accs, account)
-
- // Display a log message to the user for new (or previously empty accounts)
- if _, known := w.paths[nextAddr]; !known || (!empty && nextAddr == w.deriveNextAddr) {
- w.log.Info("Trezor discovered new account", "address", nextAddr, "path", path, "balance", balance, "nonce", nonce)
- }
- // Fetch the next potential account
- if !empty {
- nextAddr = common.Address{}
- nextPath[len(nextPath)-1]++
- }
- }
- // Self derivation complete, release device lock
- w.commsLock <- struct{}{}
- w.stateLock.RUnlock()
-
- // Insert any accounts successfully derived
- w.stateLock.Lock()
- for i := 0; i < len(accs); i++ {
- if _, ok := w.paths[accs[i].Address]; !ok {
- w.accounts = append(w.accounts, accs[i])
- w.paths[accs[i].Address] = paths[i]
- }
- }
- // Shift the self-derivation forward
- // TODO(karalabe): don't overwrite changes from wallet.SelfDerive
- w.deriveNextAddr = nextAddr
- w.deriveNextPath = nextPath
- w.stateLock.Unlock()
-
- // Notify the user of termination and loop after a bit of time (to avoid trashing)
- reqc <- struct{}{}
- if err == nil {
- select {
- case errc = <-w.deriveQuit:
- // Termination requested, abort
- case <-time.After(selfDeriveThrottling):
- // Waited enough, willing to self-derive again
- }
- }
- }
- // In case of error, wait for termination
- if err != nil {
- w.log.Debug("Trezor self-derivation failed", "err", err)
- errc = <-w.deriveQuit
- }
- errc <- err
-}
-
-// Contains implements accounts.Wallet, returning whether a particular account is
-// or is not pinned into this Trezor instance. Although we could attempt to resolve
-// unpinned accounts, that would be an non-negligible hardware operation.
-func (w *trezorWallet) Contains(account accounts.Account) bool {
- w.stateLock.RLock()
- defer w.stateLock.RUnlock()
-
- _, exists := w.paths[account.Address]
- return exists
-}
-
-// Derive implements accounts.Wallet, deriving a new account at the specific
-// derivation path. If pin is set to true, the account will be added to the list
-// of tracked accounts.
-func (w *trezorWallet) Derive(path accounts.DerivationPath, pin bool) (accounts.Account, error) {
- // Try to derive the actual account and update its URL if successful
- w.stateLock.RLock() // Avoid device disappearing during derivation
-
- if w.device == nil {
- w.stateLock.RUnlock()
- return accounts.Account{}, accounts.ErrWalletClosed
- }
- <-w.commsLock // Avoid concurrent hardware access
- address, err := w.trezorDerive(path)
- w.commsLock <- struct{}{}
-
- w.stateLock.RUnlock()
-
- // If an error occurred or no pinning was requested, return
- if err != nil {
- return accounts.Account{}, err
- }
- account := accounts.Account{
- Address: address,
- URL: accounts.URL{Scheme: w.url.Scheme, Path: fmt.Sprintf("%s/%s", w.url.Path, path)},
- }
- if !pin {
- return account, nil
- }
- // Pinning needs to modify the state
- w.stateLock.Lock()
- defer w.stateLock.Unlock()
-
- if _, ok := w.paths[address]; !ok {
- w.accounts = append(w.accounts, account)
- w.paths[address] = path
- }
- return account, nil
-}
-
-// SelfDerive implements accounts.Wallet, trying to discover accounts that the
-// user used previously (based on the chain state), but ones that he/she did not
-// explicitly pin to the wallet manually. To avoid chain head monitoring, self
-// derivation only runs during account listing (and even then throttled).
-func (w *trezorWallet) SelfDerive(base accounts.DerivationPath, chain ethereum.ChainStateReader) {
- w.stateLock.Lock()
- defer w.stateLock.Unlock()
-
- w.deriveNextPath = make(accounts.DerivationPath, len(base))
- copy(w.deriveNextPath[:], base[:])
-
- w.deriveNextAddr = common.Address{}
- w.deriveChain = chain
-}
-
-// SignHash implements accounts.Wallet, however signing arbitrary data is not
-// supported for Trezor wallets, so this method will always return an error.
-func (w *trezorWallet) SignHash(acc accounts.Account, hash []byte) ([]byte, error) {
- return nil, accounts.ErrNotSupported
-}
-
-// SignTx implements accounts.Wallet. It sends the transaction over to the Trezor
-// wallet to request a confirmation from the user. It returns either the signed
-// transaction or a failure if the user denied the transaction.
-func (w *trezorWallet) SignTx(account accounts.Account, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
- w.stateLock.RLock() // Comms have own mutex, this is for the state fields
- defer w.stateLock.RUnlock()
-
- // If the wallet is closed, abort
- if w.device == nil {
- return nil, accounts.ErrWalletClosed
- }
- // Make sure the requested account is contained within
- path, ok := w.paths[account.Address]
- if !ok {
- return nil, accounts.ErrUnknownAccount
- }
- // All infos gathered and metadata checks out, request signing
- <-w.commsLock
- defer func() { w.commsLock <- struct{}{} }()
-
- // Ensure the device isn't screwed with while user confirmation is pending
- // TODO(karalabe): remove if hotplug lands on Windows
- w.hub.commsLock.Lock()
- w.hub.commsPend++
- w.hub.commsLock.Unlock()
-
- defer func() {
- w.hub.commsLock.Lock()
- w.hub.commsPend--
- w.hub.commsLock.Unlock()
- }()
-
- return w.trezorSign(path, account.Address, tx, chainID)
-}
-
-// SignHashWithPassphrase implements accounts.Wallet, however signing arbitrary
-// data is not supported for Trezor wallets, so this method will always return
-// an error.
-func (w *trezorWallet) SignHashWithPassphrase(account accounts.Account, passphrase string, hash []byte) ([]byte, error) {
- return nil, accounts.ErrNotSupported
-}
-
-// SignTxWithPassphrase implements accounts.Wallet, attempting to sign the given
-// transaction with the given account using passphrase as extra authentication.
-// Since the Trezor does not support extra passphrases, it is silently ignored.
-func (w *trezorWallet) SignTxWithPassphrase(account accounts.Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
- return w.SignTx(account, tx, chainID)
-}
-
-// trezorDerive sends a derivation request to the Trezor device and returns the
-// Ethereum address located on that path.
-func (w *trezorWallet) trezorDerive(derivationPath []uint32) (common.Address, error) {
- address := new(trezor.EthereumAddress)
- if err := w.trezorExchange(&trezor.EthereumGetAddress{AddressN: derivationPath}, address); err != nil {
- return common.Address{}, err
- }
- return common.BytesToAddress(address.GetAddress()), nil
-}
-
-// trezorSign sends the transaction to the Trezor wallet, and waits for the user
-// to confirm or deny the transaction.
-func (w *trezorWallet) trezorSign(derivationPath []uint32, address common.Address, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
- // Create the transaction initiation message
- data := tx.Data()
- length := uint32(len(data))
-
- request := &trezor.EthereumSignTx{
- AddressN: derivationPath,
- Nonce: new(big.Int).SetUint64(tx.Nonce()).Bytes(),
- GasPrice: tx.GasPrice().Bytes(),
- GasLimit: tx.Gas().Bytes(),
- Value: tx.Value().Bytes(),
- DataLength: &length,
- }
- if to := tx.To(); to != nil {
- request.To = (*to)[:] // Non contract deploy, set recipient explicitly
- }
- if length > 1024 { // Send the data chunked if that was requested
- request.DataInitialChunk, data = data[:1024], data[1024:]
- } else {
- request.DataInitialChunk, data = data, nil
- }
- if chainID != nil { // EIP-155 transaction, set chain ID explicitly (only 32 bit is supported!?)
- id := uint32(chainID.Int64())
- request.ChainId = &id
- }
- // Send the initiation message and stream content until a signature is returned
- response := new(trezor.EthereumTxRequest)
- if err := w.trezorExchange(request, response); err != nil {
- return nil, err
- }
- for response.DataLength != nil && int(*response.DataLength) <= len(data) {
- chunk := data[:*response.DataLength]
- data = data[*response.DataLength:]
-
- if err := w.trezorExchange(&trezor.EthereumTxAck{DataChunk: chunk}, response); err != nil {
- return nil, err
- }
- }
- // Extract the Ethereum signature and do a sanity validation
- if len(response.GetSignatureR()) == 0 || len(response.GetSignatureS()) == 0 || response.GetSignatureV() == 0 {
- return nil, errors.New("reply lacks signature")
- }
- signature := append(append(response.GetSignatureR(), response.GetSignatureS()...), byte(response.GetSignatureV()))
-
- // 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] - byte(chainID.Uint64()*2+35)
- }
- // 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 != address {
- return nil, fmt.Errorf("signer mismatch: expected %s, got %s", address.Hex(), sender.Hex())
- }
- return signed, nil
-}
-
-// trezorExchange performs a data exchange with the Trezor wallet, sending it a
-// message and retrieving the response.
-func (w *trezorWallet) trezorExchange(req proto.Message, res proto.Message) error {
- // Construct the original message payload to chunk up
- data, err := proto.Marshal(req)
- if err != nil {
- return err
- }
- payload := make([]byte, 8+len(data))
- copy(payload, []byte{0x23, 0x23})
- binary.BigEndian.PutUint16(payload[2:], trezor.Type(req))
- binary.BigEndian.PutUint32(payload[4:], uint32(len(data)))
- copy(payload[8:], data)
-
- // Stream all the chunks to the device
- chunk := make([]byte, 64)
- chunk[0] = 0x3f // Report ID magic number
-
- for len(payload) > 0 {
- // Construct the new message to stream, padding with zeroes if needed
- if len(payload) > 63 {
- copy(chunk[1:], payload[:63])
- payload = payload[63:]
- } else {
- copy(chunk[1:], payload)
- copy(chunk[1+len(payload):], make([]byte, 63-len(payload)))
- payload = nil
- }
- // Send over to the device
- w.log.Trace("Data chunk sent to the Trezor", "chunk", hexutil.Bytes(chunk))
- if _, err := w.device.Write(chunk); err != nil {
- return err
- }
- }
- // Stream the reply back from the wallet in 64 byte chunks
- var (
- kind uint16
- reply []byte
- )
- for {
- // Read the next chunk from the Trezor wallet
- if _, err := io.ReadFull(w.device, chunk); err != nil {
- return err
- }
- w.log.Trace("Data chunk received from the Trezor", "chunk", hexutil.Bytes(chunk))
-
- // Make sure the transport header matches
- if chunk[0] != 0x3f || (len(reply) == 0 && (chunk[1] != 0x23 || chunk[2] != 0x23)) {
- return errReplyInvalidHeader
- }
- // If it's the first chunk, retrieve the reply message type and total message length
- var payload []byte
-
- if len(reply) == 0 {
- kind = binary.BigEndian.Uint16(chunk[3:5])
- reply = make([]byte, 0, int(binary.BigEndian.Uint32(chunk[5:9])))
- payload = chunk[9:]
- } else {
- payload = chunk[1:]
- }
- // Append to the reply and stop when filled up
- if left := cap(reply) - len(reply); left > len(payload) {
- reply = append(reply, payload...)
- } else {
- reply = append(reply, payload[:left]...)
- break
- }
- }
- // Try to parse the reply into the requested reply message
- if kind == uint16(trezor.MessageType_MessageType_Failure) {
- // Trezor returned a failure, extract and return the message
- failure := new(trezor.Failure)
- if err := proto.Unmarshal(reply, failure); err != nil {
- return err
- }
- return errors.New("trezor: " + failure.GetMessage())
- }
- if kind == uint16(trezor.MessageType_MessageType_ButtonRequest) {
- // Trezor is waitinf for user confirmation, ack and wait for the next message
- return w.trezorExchange(&trezor.ButtonAck{}, res)
- }
- if want := trezor.Type(res); kind != want {
- return fmt.Errorf("trezor: expected reply type %s, got %s", trezor.Name(want), trezor.Name(kind))
- }
- return proto.Unmarshal(reply, res)
-}
diff --git a/accounts/usbwallet/usbwallet.go b/accounts/usbwallet/usbwallet.go
deleted file mode 100644
index 3ed471693f666ab643fbd93da2901b366c56b573..0000000000000000000000000000000000000000
--- a/accounts/usbwallet/usbwallet.go
+++ /dev/null
@@ -1,34 +0,0 @@
-// 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 "time"
-
-// deviceID is a combined vendor/product identifier to uniquely identify a USB
-// hardware device.
-type deviceID struct {
- Vendor uint16 // The Vendor identifer
- Product uint16 // The Product identifier
-}
-
-// Maximum time between wallet health checks to detect USB unplugs.
-const heartbeatCycle = time.Second
-
-// Minimum time to wait between self derivation attempts, even it the user is
-// requesting accounts like crazy.
-const selfDeriveThrottling = time.Second
diff --git a/accounts/usbwallet/wallet.go b/accounts/usbwallet/wallet.go
new file mode 100644
index 0000000000000000000000000000000000000000..8b3b5a522402e1bf96f1086a1297102acac22bfa
--- /dev/null
+++ b/accounts/usbwallet/wallet.go
@@ -0,0 +1,562 @@
+// 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 (
+ "context"
+ "fmt"
+ "io"
+ "math/big"
+ "sync"
+ "time"
+
+ ethereum "github.com/ethereum/go-ethereum"
+ "github.com/ethereum/go-ethereum/accounts"
+ "github.com/ethereum/go-ethereum/common"
+ "github.com/ethereum/go-ethereum/core/types"
+ "github.com/ethereum/go-ethereum/log"
+ "github.com/karalabe/hid"
+)
+
+// Maximum time between wallet health checks to detect USB unplugs.
+const heartbeatCycle = time.Second
+
+// Minimum time to wait between self derivation attempts, even it the user is
+// requesting accounts like crazy.
+const selfDeriveThrottling = time.Second
+
+// driver defines the vendor specific functionality hardware wallets instances
+// must implement to allow using them with the wallet lifecycle management.
+type driver interface {
+ // Status returns a textual status to aid the user in the current state of the
+ // wallet. It also returns an error indicating any failure the wallet might have
+ // encountered.
+ Status() (string, error)
+
+ // Open initializes access to a wallet instance. The passphrase parameter may
+ // or may not be used by the implementation of a particular wallet instance.
+ Open(device io.ReadWriter, passphrase string) error
+
+ // Close releases any resources held by an open wallet instance.
+ Close() error
+
+ // Heartbeat performs a sanity check against the hardware wallet to see if it
+ // is still online and healthy.
+ Heartbeat() error
+
+ // Derive sends a derivation request to the USB device and returns the Ethereum
+ // address located on that path.
+ Derive(path accounts.DerivationPath) (common.Address, error)
+
+ // SignTx sends the transaction to the USB device and waits for the user to confirm
+ // or deny the transaction.
+ SignTx(path accounts.DerivationPath, tx *types.Transaction, chainID *big.Int) (common.Address, *types.Transaction, error)
+}
+
+// wallet represents the common functionality shared by all USB hardware
+// wallets to prevent reimplementing the same complex maintenance mechanisms
+// for different vendors.
+type wallet struct {
+ hub *Hub // USB hub scanning
+ driver driver // Hardware implementation of the low level device operations
+ url *accounts.URL // Textual URL uniquely identifying this wallet
+
+ info hid.DeviceInfo // Known USB device infos about the wallet
+ device *hid.Device // USB device advertising itself as a hardware wallet
+
+ accounts []accounts.Account // List of derive accounts pinned on the hardware wallet
+ paths map[common.Address]accounts.DerivationPath // Known derivation paths for signing operations
+
+ deriveNextPath accounts.DerivationPath // Next derivation path for account auto-discovery
+ deriveNextAddr common.Address // Next derived account address for auto-discovery
+ deriveChain ethereum.ChainStateReader // Blockchain state reader to discover used account with
+ deriveReq chan chan struct{} // Channel to request a self-derivation on
+ deriveQuit chan chan error // Channel to terminate the self-deriver with
+
+ healthQuit chan chan error
+
+ // Locking a hardware wallet is a bit special. Since hardware devices are lower
+ // performing, any communication with them might take a non negligible amount of
+ // time. Worse still, waiting for user confirmation can take arbitrarily long,
+ // but exclusive communication must be upheld during. Locking the entire wallet
+ // in the mean time however would stall any parts of the system that don't want
+ // to communicate, just read some state (e.g. list the accounts).
+ //
+ // As such, a hardware wallet needs two locks to function correctly. A state
+ // lock can be used to protect the wallet's software-side internal state, which
+ // must not be held exlusively during hardware communication. A communication
+ // lock can be used to achieve exclusive access to the device itself, this one
+ // however should allow "skipping" waiting for operations that might want to
+ // use the device, but can live without too (e.g. account self-derivation).
+ //
+ // Since we have two locks, it's important to know how to properly use them:
+ // - Communication requires the `device` to not change, so obtaining the
+ // commsLock should be done after having a stateLock.
+ // - Communication must not disable read access to the wallet state, so it
+ // must only ever hold a *read* lock to stateLock.
+ commsLock chan struct{} // Mutex (buf=1) for the USB comms without keeping the state locked
+ stateLock sync.RWMutex // Protects read and write access to the wallet struct fields
+
+ log log.Logger // Contextual logger to tag the base with its id
+}
+
+// URL implements accounts.Wallet, returning the URL of the USB hardware device.
+func (w *wallet) URL() accounts.URL {
+ return *w.url // Immutable, no need for a lock
+}
+
+// Status implements accounts.Wallet, returning a custom status message from the
+// underlying vendor-specific hardware wallet implementation.
+func (w *wallet) Status() (string, error) {
+ w.stateLock.RLock() // No device communication, state lock is enough
+ defer w.stateLock.RUnlock()
+
+ status, failure := w.driver.Status()
+ if w.device == nil {
+ return "Closed", failure
+ }
+ return status, failure
+}
+
+// Open implements accounts.Wallet, attempting to open a USB connection to the
+// hardware wallet.
+func (w *wallet) Open(passphrase string) error {
+ w.stateLock.Lock() // State lock is enough since there's no connection yet at this point
+ defer w.stateLock.Unlock()
+
+ // If the device was already opened once, refuse to try again
+ if w.paths != nil {
+ return accounts.ErrWalletAlreadyOpen
+ }
+ // Make sure the actual device connection is done only once
+ if w.device == nil {
+ device, err := w.info.Open()
+ if err != nil {
+ return err
+ }
+ w.device = device
+ w.commsLock = make(chan struct{}, 1)
+ w.commsLock <- struct{}{} // Enable lock
+ }
+ // Delegate device initialization to the underlying driver
+ if err := w.driver.Open(w.device, passphrase); err != nil {
+ return err
+ }
+ // Connection successful, start life-cycle management
+ w.paths = make(map[common.Address]accounts.DerivationPath)
+
+ w.deriveReq = make(chan chan struct{})
+ w.deriveQuit = make(chan chan error)
+ w.healthQuit = make(chan chan error)
+
+ go w.heartbeat()
+ go w.selfDerive()
+
+ // Notify anyone listening for wallet events that a new device is accessible
+ go w.hub.updateFeed.Send(accounts.WalletEvent{Wallet: w, Kind: accounts.WalletOpened})
+
+ return nil
+}
+
+// heartbeat is a health check loop for the USB wallets to periodically verify
+// whether they are still present or if they malfunctioned.
+func (w *wallet) heartbeat() {
+ w.log.Debug("USB wallet health-check started")
+ defer w.log.Debug("USB wallet health-check stopped")
+
+ // Execute heartbeat checks until termination or error
+ var (
+ errc chan error
+ err error
+ )
+ for errc == nil && err == nil {
+ // Wait until termination is requested or the heartbeat cycle arrives
+ select {
+ case errc = <-w.healthQuit:
+ // Termination requested
+ continue
+ case <-time.After(heartbeatCycle):
+ // Heartbeat time
+ }
+ // Execute a tiny data exchange to see responsiveness
+ w.stateLock.RLock()
+ if w.device == nil {
+ // Terminated while waiting for the lock
+ w.stateLock.RUnlock()
+ continue
+ }
+ <-w.commsLock // Don't lock state while resolving version
+ err = w.driver.Heartbeat()
+ w.commsLock <- struct{}{}
+ w.stateLock.RUnlock()
+
+ if err != nil {
+ w.stateLock.Lock() // Lock state to tear the wallet down
+ w.close()
+ w.stateLock.Unlock()
+ }
+ // Ignore non hardware related errors
+ err = nil
+ }
+ // In case of error, wait for termination
+ if err != nil {
+ w.log.Debug("USB wallet health-check failed", "err", err)
+ errc = <-w.healthQuit
+ }
+ errc <- err
+}
+
+// Close implements accounts.Wallet, closing the USB connection to the device.
+func (w *wallet) Close() error {
+ // Ensure the wallet was opened
+ w.stateLock.RLock()
+ hQuit, dQuit := w.healthQuit, w.deriveQuit
+ w.stateLock.RUnlock()
+
+ // Terminate the health checks
+ var herr error
+ if hQuit != nil {
+ errc := make(chan error)
+ hQuit <- errc
+ herr = <-errc // Save for later, we *must* close the USB
+ }
+ // Terminate the self-derivations
+ var derr error
+ if dQuit != nil {
+ errc := make(chan error)
+ dQuit <- errc
+ derr = <-errc // Save for later, we *must* close the USB
+ }
+ // Terminate the device connection
+ w.stateLock.Lock()
+ defer w.stateLock.Unlock()
+
+ w.healthQuit = nil
+ w.deriveQuit = nil
+ w.deriveReq = nil
+
+ if err := w.close(); err != nil {
+ return err
+ }
+ if herr != nil {
+ return herr
+ }
+ return derr
+}
+
+// close is the internal wallet closer that terminates the USB connection and
+// resets all the fields to their defaults.
+//
+// Note, close assumes the state lock is held!
+func (w *wallet) close() error {
+ // Allow duplicate closes, especially for health-check failures
+ if w.device == nil {
+ return nil
+ }
+ // Close the device, clear everything, then return
+ w.device.Close()
+ w.device = nil
+
+ w.accounts, w.paths = nil, nil
+ w.driver.Close()
+
+ return nil
+}
+
+// Accounts implements accounts.Wallet, returning the list of accounts pinned to
+// the USB hardware wallet. If self-derivation was enabled, the account list is
+// periodically expanded based on current chain state.
+func (w *wallet) Accounts() []accounts.Account {
+ // Attempt self-derivation if it's running
+ reqc := make(chan struct{}, 1)
+ select {
+ case w.deriveReq <- reqc:
+ // Self-derivation request accepted, wait for it
+ <-reqc
+ default:
+ // Self-derivation offline, throttled or busy, skip
+ }
+ // Return whatever account list we ended up with
+ w.stateLock.RLock()
+ defer w.stateLock.RUnlock()
+
+ cpy := make([]accounts.Account, len(w.accounts))
+ copy(cpy, w.accounts)
+ return cpy
+}
+
+// selfDerive is an account derivation loop that upon request attempts to find
+// new non-zero accounts.
+func (w *wallet) selfDerive() {
+ w.log.Debug("USB wallet self-derivation started")
+ defer w.log.Debug("USB wallet self-derivation stopped")
+
+ // Execute self-derivations until termination or error
+ var (
+ reqc chan struct{}
+ errc chan error
+ err error
+ )
+ for errc == nil && err == nil {
+ // Wait until either derivation or termination is requested
+ select {
+ case errc = <-w.deriveQuit:
+ // Termination requested
+ continue
+ case reqc = <-w.deriveReq:
+ // Account discovery requested
+ }
+ // Derivation needs a chain and device access, skip if either unavailable
+ w.stateLock.RLock()
+ if w.device == nil || w.deriveChain == nil {
+ w.stateLock.RUnlock()
+ reqc <- struct{}{}
+ continue
+ }
+ select {
+ case <-w.commsLock:
+ default:
+ w.stateLock.RUnlock()
+ reqc <- struct{}{}
+ continue
+ }
+ // Device lock obtained, derive the next batch of accounts
+ var (
+ accs []accounts.Account
+ paths []accounts.DerivationPath
+
+ nextAddr = w.deriveNextAddr
+ nextPath = w.deriveNextPath
+
+ context = context.Background()
+ )
+ for empty := false; !empty; {
+ // Retrieve the next derived Ethereum account
+ if nextAddr == (common.Address{}) {
+ if nextAddr, err = w.driver.Derive(nextPath); err != nil {
+ w.log.Warn("USB wallet account derivation failed", "err", err)
+ break
+ }
+ }
+ // Check the account's status against the current chain state
+ var (
+ balance *big.Int
+ nonce uint64
+ )
+ balance, err = w.deriveChain.BalanceAt(context, nextAddr, nil)
+ if err != nil {
+ w.log.Warn("USB wallet balance retrieval failed", "err", err)
+ break
+ }
+ nonce, err = w.deriveChain.NonceAt(context, nextAddr, nil)
+ if err != nil {
+ w.log.Warn("USB wallet nonce retrieval failed", "err", err)
+ break
+ }
+ // If the next account is empty, stop self-derivation, but add it nonetheless
+ if balance.Sign() == 0 && nonce == 0 {
+ empty = true
+ }
+ // We've just self-derived a new account, start tracking it locally
+ path := make(accounts.DerivationPath, len(nextPath))
+ copy(path[:], nextPath[:])
+ paths = append(paths, path)
+
+ account := accounts.Account{
+ Address: nextAddr,
+ URL: accounts.URL{Scheme: w.url.Scheme, Path: fmt.Sprintf("%s/%s", w.url.Path, path)},
+ }
+ accs = append(accs, account)
+
+ // Display a log message to the user for new (or previously empty accounts)
+ if _, known := w.paths[nextAddr]; !known || (!empty && nextAddr == w.deriveNextAddr) {
+ w.log.Info("USB wallet discovered new account", "address", nextAddr, "path", path, "balance", balance, "nonce", nonce)
+ }
+ // Fetch the next potential account
+ if !empty {
+ nextAddr = common.Address{}
+ nextPath[len(nextPath)-1]++
+ }
+ }
+ // Self derivation complete, release device lock
+ w.commsLock <- struct{}{}
+ w.stateLock.RUnlock()
+
+ // Insert any accounts successfully derived
+ w.stateLock.Lock()
+ for i := 0; i < len(accs); i++ {
+ if _, ok := w.paths[accs[i].Address]; !ok {
+ w.accounts = append(w.accounts, accs[i])
+ w.paths[accs[i].Address] = paths[i]
+ }
+ }
+ // Shift the self-derivation forward
+ // TODO(karalabe): don't overwrite changes from wallet.SelfDerive
+ w.deriveNextAddr = nextAddr
+ w.deriveNextPath = nextPath
+ w.stateLock.Unlock()
+
+ // Notify the user of termination and loop after a bit of time (to avoid trashing)
+ reqc <- struct{}{}
+ if err == nil {
+ select {
+ case errc = <-w.deriveQuit:
+ // Termination requested, abort
+ case <-time.After(selfDeriveThrottling):
+ // Waited enough, willing to self-derive again
+ }
+ }
+ }
+ // In case of error, wait for termination
+ if err != nil {
+ w.log.Debug("USB wallet self-derivation failed", "err", err)
+ errc = <-w.deriveQuit
+ }
+ errc <- err
+}
+
+// Contains implements accounts.Wallet, returning whether a particular account is
+// or is not pinned into this wallet instance. Although we could attempt to resolve
+// unpinned accounts, that would be an non-negligible hardware operation.
+func (w *wallet) Contains(account accounts.Account) bool {
+ w.stateLock.RLock()
+ defer w.stateLock.RUnlock()
+
+ _, exists := w.paths[account.Address]
+ return exists
+}
+
+// Derive implements accounts.Wallet, deriving a new account at the specific
+// derivation path. If pin is set to true, the account will be added to the list
+// of tracked accounts.
+func (w *wallet) Derive(path accounts.DerivationPath, pin bool) (accounts.Account, error) {
+ // Try to derive the actual account and update its URL if successful
+ w.stateLock.RLock() // Avoid device disappearing during derivation
+
+ if w.device == nil {
+ w.stateLock.RUnlock()
+ return accounts.Account{}, accounts.ErrWalletClosed
+ }
+ <-w.commsLock // Avoid concurrent hardware access
+ address, err := w.driver.Derive(path)
+ w.commsLock <- struct{}{}
+
+ w.stateLock.RUnlock()
+
+ // If an error occurred or no pinning was requested, return
+ if err != nil {
+ return accounts.Account{}, err
+ }
+ account := accounts.Account{
+ Address: address,
+ URL: accounts.URL{Scheme: w.url.Scheme, Path: fmt.Sprintf("%s/%s", w.url.Path, path)},
+ }
+ if !pin {
+ return account, nil
+ }
+ // Pinning needs to modify the state
+ w.stateLock.Lock()
+ defer w.stateLock.Unlock()
+
+ if _, ok := w.paths[address]; !ok {
+ w.accounts = append(w.accounts, account)
+ w.paths[address] = path
+ }
+ return account, nil
+}
+
+// SelfDerive implements accounts.Wallet, trying to discover accounts that the
+// user used previously (based on the chain state), but ones that he/she did not
+// explicitly pin to the wallet manually. To avoid chain head monitoring, self
+// derivation only runs during account listing (and even then throttled).
+func (w *wallet) SelfDerive(base accounts.DerivationPath, chain ethereum.ChainStateReader) {
+ w.stateLock.Lock()
+ defer w.stateLock.Unlock()
+
+ w.deriveNextPath = make(accounts.DerivationPath, len(base))
+ copy(w.deriveNextPath[:], base[:])
+
+ w.deriveNextAddr = common.Address{}
+ w.deriveChain = chain
+}
+
+// SignHash implements accounts.Wallet, however signing arbitrary data is not
+// supported for hardware wallets, so this method will always return an error.
+func (w *wallet) SignHash(account accounts.Account, hash []byte) ([]byte, error) {
+ return nil, accounts.ErrNotSupported
+}
+
+// SignTx implements accounts.Wallet. It sends the transaction over to the Ledger
+// wallet to request a confirmation from the user. It returns either the signed
+// transaction or a failure if the user denied the transaction.
+//
+// Note, if the version of the Ethereum application running on the Ledger wallet is
+// too old to sign EIP-155 transactions, but such is requested nonetheless, an error
+// will be returned opposed to silently signing in Homestead mode.
+func (w *wallet) SignTx(account accounts.Account, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
+ w.stateLock.RLock() // Comms have own mutex, this is for the state fields
+ defer w.stateLock.RUnlock()
+
+ // If the wallet is closed, abort
+ if w.device == nil {
+ return nil, accounts.ErrWalletClosed
+ }
+ // Make sure the requested account is contained within
+ path, ok := w.paths[account.Address]
+ if !ok {
+ return nil, accounts.ErrUnknownAccount
+ }
+ // All infos gathered and metadata checks out, request signing
+ <-w.commsLock
+ defer func() { w.commsLock <- struct{}{} }()
+
+ // Ensure the device isn't screwed with while user confirmation is pending
+ // TODO(karalabe): remove if hotplug lands on Windows
+ w.hub.commsLock.Lock()
+ w.hub.commsPend++
+ w.hub.commsLock.Unlock()
+
+ defer func() {
+ w.hub.commsLock.Lock()
+ w.hub.commsPend--
+ w.hub.commsLock.Unlock()
+ }()
+ // Sign the transaction and verify the sender to avoid hardware fault surprises
+ sender, signed, err := w.driver.SignTx(path, tx, chainID)
+ if err != nil {
+ return nil, err
+ }
+ if sender != account.Address {
+ return nil, fmt.Errorf("signer mismatch: expected %s, got %s", account.Address.Hex(), sender.Hex())
+ }
+ return signed, nil
+}
+
+// SignHashWithPassphrase implements accounts.Wallet, however signing arbitrary
+// data is not supported for Ledger wallets, so this method will always return
+// an error.
+func (w *wallet) SignHashWithPassphrase(account accounts.Account, passphrase string, hash []byte) ([]byte, error) {
+ return w.SignHash(account, hash)
+}
+
+// SignTxWithPassphrase implements accounts.Wallet, attempting to sign the given
+// transaction with the given account using passphrase as extra authentication.
+// Since USB wallets don't rely on passphrases, these are silently ignored.
+func (w *wallet) SignTxWithPassphrase(account accounts.Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
+ return w.SignTx(account, tx, chainID)
+}
diff --git a/cmd/geth/main.go b/cmd/geth/main.go
index 257cb2231099f6f59d98a3158fa634761e3f4b46..34d1d840656c31ece95b6af6fb9e236fc4341525 100644
--- a/cmd/geth/main.go
+++ b/cmd/geth/main.go
@@ -251,7 +251,9 @@ func startNode(ctx *cli.Context, stack *node.Node) {
log.Warn("New wallet appeared, failed to open", "url", event.Wallet.URL(), "err", err)
}
case accounts.WalletOpened:
- log.Info("New wallet appeared", "url", event.Wallet.URL(), "status", event.Wallet.Status())
+ status, _ := event.Wallet.Status()
+ log.Info("New wallet appeared", "url", event.Wallet.URL(), "status", status)
+
if event.Wallet.URL().Scheme == "ledger" {
event.Wallet.SelfDerive(accounts.DefaultLedgerBaseDerivationPath, stateReader)
} else {
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 6b9c151cfcdbe5fa8cc91970b04f50cf2fce4bec..c3924b93a7ed5322b37fe07f3d44b27d3236bf95 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -230,18 +230,25 @@ func (s *PrivateAccountAPI) ListAccounts() []common.Address {
type rawWallet struct {
URL string `json:"url"`
Status string `json:"status"`
- Accounts []accounts.Account `json:"accounts"`
+ Failure string `json:"failure,omitempty"`
+ Accounts []accounts.Account `json:"accounts,omitempty"`
}
// ListWallets will return a list of wallets this node manages.
func (s *PrivateAccountAPI) ListWallets() []rawWallet {
wallets := make([]rawWallet, 0) // return [] instead of nil if empty
for _, wallet := range s.am.Wallets() {
- wallets = append(wallets, rawWallet{
+ status, failure := wallet.Status()
+
+ raw := rawWallet{
URL: wallet.URL().String(),
- Status: wallet.Status(),
+ Status: status,
Accounts: wallet.Accounts(),
- })
+ }
+ if failure != nil {
+ raw.Failure = failure.Error()
+ }
+ wallets = append(wallets, raw)
}
return wallets
}