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Merge pull request #19438 from karalabe/ledger-new-derivation-path

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accounts: switch Ledger derivation path to canonical one
This commit is contained in:
Péter Szilágyi 2019-04-25 13:33:17 +03:00 committed by GitHub
commit 7c91038bff
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GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 165 additions and 135 deletions
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6
accounts/accounts.go
View File

@ -92,9 +92,13 @@ type Wallet interface {
// opposed to decending into a child path to allow discovering accounts starting
// from non zero components.
//
// Some hardware wallets switched derivation paths through their evolution, so
// this method supports providing multiple bases to discover old user accounts
// too. Only the last base will be used to derive the next empty account.
//
// You can disable automatic account discovery by calling SelfDerive with a nil
// chain state reader.
SelfDerive(base DerivationPath, chain ethereum.ChainStateReader)
SelfDerive(bases []DerivationPath, chain ethereum.ChainStateReader)
// SignData requests the wallet to sign the hash of the given data
// It looks up the account specified either solely via its address contained within,

2
accounts/external/backend.go vendored
View File

@ -143,7 +143,7 @@ func (api *ExternalSigner) Derive(path accounts.DerivationPath, pin bool) (accou
return accounts.Account{}, fmt.Errorf("operation not supported on external signers")
}
func (api *ExternalSigner) SelfDerive(base accounts.DerivationPath, chain ethereum.ChainStateReader) {
func (api *ExternalSigner) SelfDerive(bases []accounts.DerivationPath, chain ethereum.ChainStateReader) {
log.Error("operation SelfDerive not supported on external signers")
}

8
accounts/hd.go
View File

@ -35,10 +35,10 @@ var DefaultRootDerivationPath = DerivationPath{0x80000000 + 44, 0x80000000 + 60,
// at m/44'/60'/0'/0/1, etc.
var DefaultBaseDerivationPath = DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0}
// DefaultLedgerBaseDerivationPath is the base path from which custom derivation endpoints
// are incremented. As such, the first account will be at m/44'/60'/0'/0, the second
// at m/44'/60'/0'/1, etc.
var DefaultLedgerBaseDerivationPath = DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}
// LegacyLedgerBaseDerivationPath is the legacy base path from which custom derivation
// endpoints are incremented. As such, the first account will be at m/44'/60'/0'/0, the
// second at m/44'/60'/0'/1, etc.
var LegacyLedgerBaseDerivationPath = DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}
// DerivationPath represents the computer friendly version of a hierarchical
// deterministic wallet account derivaion path.

3
accounts/keystore/wallet.go
View File

@ -77,7 +77,8 @@ func (w *keystoreWallet) Derive(path accounts.DerivationPath, pin bool) (account
// SelfDerive implements accounts.Wallet, but is a noop for plain wallets since
// there is no notion of hierarchical account derivation for plain keystore accounts.
func (w *keystoreWallet) SelfDerive(base accounts.DerivationPath, chain ethereum.ChainStateReader) {}
func (w *keystoreWallet) SelfDerive(bases []accounts.DerivationPath, chain ethereum.ChainStateReader) {
}
// signHash attempts to sign the given hash with
// the given account. If the wallet does not wrap this particular account, an

74
accounts/scwallet/wallet.go
View File

@ -119,8 +119,8 @@ type Wallet struct {
session *Session // The secure communication session with the card
log log.Logger // Contextual logger to tag the base with its id
deriveNextPath accounts.DerivationPath // Next derivation path for account auto-discovery
deriveNextAddr common.Address // Next derived account address for auto-discovery
deriveNextPaths []accounts.DerivationPath // Next derivation paths for account auto-discovery (multiple bases supported)
deriveNextAddrs []common.Address // Next derived account addresses for auto-discovery (multiple bases supported)
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
@ -390,7 +390,7 @@ func (w *Wallet) Open(passphrase string) error {
w.deriveReq = make(chan chan struct{})
w.deriveQuit = make(chan chan error)
go w.selfDerive(0)
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})
@ -426,9 +426,8 @@ func (w *Wallet) Close() error {
}
// selfDerive is an account derivation loop that upon request attempts to find
// new non-zero accounts. maxEmpty specifies the number of empty accounts that
// should be derived once an initial empty account has been found.
func (w *Wallet) selfDerive(maxEmpty int) {
// new non-zero accounts.
func (w *Wallet) selfDerive() {
w.log.Debug("Smart card wallet self-derivation started")
defer w.log.Debug("Smart card wallet self-derivation stopped")
@ -461,56 +460,59 @@ func (w *Wallet) selfDerive(maxEmpty int) {
paths []accounts.DerivationPath
nextAcc accounts.Account
nextAddr = w.deriveNextAddr
nextPath = w.deriveNextPath
nextPaths = append([]accounts.DerivationPath{}, w.deriveNextPaths...)
nextAddrs = append([]common.Address{}, w.deriveNextAddrs...)
context = context.Background()
)
for empty, emptyCount := false, maxEmpty+1; !empty || emptyCount > 0; {
for i := 0; i < len(nextAddrs); i++ {
for empty := false; !empty; {
// Retrieve the next derived Ethereum account
if nextAddr == (common.Address{}) {
if nextAcc, err = w.session.derive(nextPath); err != nil {
if nextAddrs[i] == (common.Address{}) {
if nextAcc, err = w.session.derive(nextPaths[i]); err != nil {
w.log.Warn("Smartcard wallet account derivation failed", "err", err)
break
}
nextAddr = nextAcc.Address
nextAddrs[i] = nextAcc.Address
}
// Check the account's status against the current chain state
var (
balance *big.Int
nonce uint64
)
balance, err = w.deriveChain.BalanceAt(context, nextAddr, nil)
balance, err = w.deriveChain.BalanceAt(context, nextAddrs[i], nil)
if err != nil {
w.log.Warn("Smartcard wallet balance retrieval failed", "err", err)
break
}
nonce, err = w.deriveChain.NonceAt(context, nextAddr, nil)
nonce, err = w.deriveChain.NonceAt(context, nextAddrs[i], nil)
if err != nil {
w.log.Warn("Smartcard wallet nonce retrieval failed", "err", err)
break
}
// If the next account is empty and no more empty accounts are
// allowed, stop self-derivation. Add the current one nonetheless.
// If the next account is empty, stop self-derivation, but add for the last base path
if balance.Sign() == 0 && nonce == 0 {
empty = true
emptyCount--
if i < len(nextAddrs)-1 {
break
}
}
// We've just self-derived a new account, start tracking it locally
path := make(accounts.DerivationPath, len(nextPath))
copy(path[:], nextPath[:])
path := make(accounts.DerivationPath, len(nextPaths[i]))
copy(path[:], nextPaths[i][:])
paths = append(paths, path)
// Display a log message to the user for new (or previously empty accounts)
if _, known := pairing.Accounts[nextAddr]; !known || !empty || nextAddr != w.deriveNextAddr {
w.log.Info("Smartcard wallet discovered new account", "address", nextAddr, "path", path, "balance", balance, "nonce", nonce)
if _, known := pairing.Accounts[nextAddrs[i]]; !known || !empty || nextAddrs[i] != w.deriveNextAddrs[i] {
w.log.Info("Smartcard wallet discovered new account", "address", nextAddrs[i], "path", path, "balance", balance, "nonce", nonce)
}
pairing.Accounts[nextAddr] = path
pairing.Accounts[nextAddrs[i]] = path
// Fetch the next potential account
if !empty || emptyCount > 0 {
nextAddr = common.Address{}
nextPath[len(nextPath)-1]++
if !empty {
nextAddrs[i] = common.Address{}
nextPaths[i][len(nextPaths[i])-1]++
}
}
}
// If there are new accounts, write them out
@ -518,8 +520,8 @@ func (w *Wallet) selfDerive(maxEmpty int) {
err = w.Hub.setPairing(w, pairing)
}
// Shift the self-derivation forward
w.deriveNextAddr = nextAddr
w.deriveNextPath = nextPath
w.deriveNextAddrs = nextAddrs
w.deriveNextPaths = nextPaths
// Self derivation complete, release device lock
w.lock.Unlock()
@ -592,7 +594,7 @@ func (w *Wallet) Contains(account accounts.Account) bool {
// Initialize installs a keypair generated from the provided key into the wallet.
func (w *Wallet) Initialize(seed []byte) error {
go w.selfDerive(0)
go w.selfDerive()
// DO NOT lock at this stage, as the initialize
// function relies on Status()
return w.session.initialize(seed)
@ -629,16 +631,22 @@ func (w *Wallet) Derive(path accounts.DerivationPath, pin bool) (accounts.Accoun
// opposed to decending into a child path to allow discovering accounts starting
// from non zero components.
//
// Some hardware wallets switched derivation paths through their evolution, so
// this method supports providing multiple bases to discover old user accounts
// too. Only the last base will be used to derive the next empty account.
//
// You can disable automatic account discovery by calling SelfDerive with a nil
// chain state reader.
func (w *Wallet) SelfDerive(base accounts.DerivationPath, chain ethereum.ChainStateReader) {
func (w *Wallet) SelfDerive(bases []accounts.DerivationPath, chain ethereum.ChainStateReader) {
w.lock.Lock()
defer w.lock.Unlock()
w.deriveNextPath = make(accounts.DerivationPath, len(base))
copy(w.deriveNextPath[:], base[:])
w.deriveNextAddr = common.Address{}
w.deriveNextPaths = make([]accounts.DerivationPath, len(bases))
for i, base := range bases {
w.deriveNextPaths[i] = make(accounts.DerivationPath, len(base))
copy(w.deriveNextPaths[i][:], base[:])
}
w.deriveNextAddrs = make([]common.Address, len(bases))
w.deriveChain = chain
}

71
accounts/usbwallet/wallet.go
View File

@ -83,8 +83,8 @@ type wallet struct {
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
deriveNextPaths []accounts.DerivationPath // Next derivation paths for account auto-discovery (multiple bases supported)
deriveNextAddrs []common.Address // Next derived account addresses for auto-discovery (multiple bases supported)
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
@ -339,15 +339,16 @@ func (w *wallet) selfDerive() {
accs []accounts.Account
paths []accounts.DerivationPath
nextAddr = w.deriveNextAddr
nextPath = w.deriveNextPath
nextPaths = append([]accounts.DerivationPath{}, w.deriveNextPaths...)
nextAddrs = append([]common.Address{}, w.deriveNextAddrs...)
context = context.Background()
)
for i := 0; i < len(nextAddrs); i++ {
for empty := false; !empty; {
// Retrieve the next derived Ethereum account
if nextAddr == (common.Address{}) {
if nextAddr, err = w.driver.Derive(nextPath); err != nil {
if nextAddrs[i] == (common.Address{}) {
if nextAddrs[i], err = w.driver.Derive(nextPaths[i]); err != nil {
w.log.Warn("USB wallet account derivation failed", "err", err)
break
}
@ -357,39 +358,43 @@ func (w *wallet) selfDerive() {
balance *big.Int
nonce uint64
)
balance, err = w.deriveChain.BalanceAt(context, nextAddr, nil)
balance, err = w.deriveChain.BalanceAt(context, nextAddrs[i], nil)
if err != nil {
w.log.Warn("USB wallet balance retrieval failed", "err", err)
break
}
nonce, err = w.deriveChain.NonceAt(context, nextAddr, nil)
nonce, err = w.deriveChain.NonceAt(context, nextAddrs[i], 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 the next account is empty, stop self-derivation, but add for the last base path
if balance.Sign() == 0 && nonce == 0 {
empty = true
if i < len(nextAddrs)-1 {
break
}
}
// We've just self-derived a new account, start tracking it locally
path := make(accounts.DerivationPath, len(nextPath))
copy(path[:], nextPath[:])
path := make(accounts.DerivationPath, len(nextPaths[i]))
copy(path[:], nextPaths[i][:])
paths = append(paths, path)
account := accounts.Account{
Address: nextAddr,
Address: nextAddrs[i],
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)
if _, known := w.paths[nextAddrs[i]]; !known || (!empty && nextAddrs[i] == w.deriveNextAddrs[i]) {
w.log.Info("USB wallet discovered new account", "address", nextAddrs[i], "path", path, "balance", balance, "nonce", nonce)
}
// Fetch the next potential account
if !empty {
nextAddr = common.Address{}
nextPath[len(nextPath)-1]++
nextAddrs[i] = common.Address{}
nextPaths[i][len(nextPaths[i])-1]++
}
}
}
// Self derivation complete, release device lock
@ -406,8 +411,8 @@ func (w *wallet) selfDerive() {
}
// Shift the self-derivation forward
// TODO(karalabe): don't overwrite changes from wallet.SelfDerive
w.deriveNextAddr = nextAddr
w.deriveNextPath = nextPath
w.deriveNextAddrs = nextAddrs
w.deriveNextPaths = nextPaths
w.stateLock.Unlock()
// Notify the user of termination and loop after a bit of time (to avoid trashing)
@ -479,18 +484,30 @@ func (w *wallet) Derive(path accounts.DerivationPath, pin bool) (accounts.Accoun
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) {
// SelfDerive sets a base account derivation path from which the wallet attempts
// to discover non zero accounts and automatically add them to list of tracked
// accounts.
//
// Note, self derivaton will increment the last component of the specified path
// opposed to decending into a child path to allow discovering accounts starting
// from non zero components.
//
// Some hardware wallets switched derivation paths through their evolution, so
// this method supports providing multiple bases to discover old user accounts
// too. Only the last base will be used to derive the next empty account.
//
// You can disable automatic account discovery by calling SelfDerive with a nil
// chain state reader.
func (w *wallet) SelfDerive(bases []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.deriveNextPaths = make([]accounts.DerivationPath, len(bases))
for i, base := range bases {
w.deriveNextPaths[i] = make(accounts.DerivationPath, len(base))
copy(w.deriveNextPaths[i][:], base[:])
}
w.deriveNextAddrs = make([]common.Address, len(bases))
w.deriveChain = chain
}

8
cmd/geth/main.go
View File

@ -342,11 +342,13 @@ func startNode(ctx *cli.Context, stack *node.Node) {
status, _ := event.Wallet.Status()
log.Info("New wallet appeared", "url", event.Wallet.URL(), "status", status)
derivationPath := accounts.DefaultBaseDerivationPath
var derivationPaths []accounts.DerivationPath
if event.Wallet.URL().Scheme == "ledger" {
derivationPath = accounts.DefaultLedgerBaseDerivationPath
derivationPaths = append(derivationPaths, accounts.LegacyLedgerBaseDerivationPath)
}
event.Wallet.SelfDerive(derivationPath, stateReader)
derivationPaths = append(derivationPaths, accounts.DefaultBaseDerivationPath)
event.Wallet.SelfDerive(derivationPaths, stateReader)
case accounts.WalletDropped:
log.Info("Old wallet dropped", "url", event.Wallet.URL())

8
signer/core/api.go
View File

@ -319,12 +319,10 @@ func (api *SignerAPI) startUSBListener() {
status, _ := event.Wallet.Status()
log.Info("New wallet appeared", "url", event.Wallet.URL(), "status", status)
derivationPath := accounts.DefaultBaseDerivationPath
if event.Wallet.URL().Scheme == "ledger" {
derivationPath = accounts.DefaultLedgerBaseDerivationPath
}
var nextPath = derivationPath
// Derive first N accounts, hardcoded for now
var nextPath = make(accounts.DerivationPath, len(accounts.DefaultBaseDerivationPath))
copy(nextPath[:], accounts.DefaultBaseDerivationPath[:])
for i := 0; i < numberOfAccountsToDerive; i++ {
acc, err := event.Wallet.Derive(nextPath, true)
if err != nil {