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accounts, cmd, eth, internal, miner, node: wallets and HD APIs

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This commit is contained in:
Péter Szilágyi
2017-02-07 12:47:34 +02:00
parent b3c0e9d3cc
commit fad5eb0a87
23 changed files with 1505 additions and 606 deletions
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178
accounts/keystore/keystore.go
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@ -37,23 +37,34 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/event"
)
var (
ErrNeedPasswordOrUnlock = accounts.NewAuthNeededError("password or unlock")
ErrNoMatch = errors.New("no key for given address or file")
ErrDecrypt = errors.New("could not decrypt key with given passphrase")
ErrLocked = accounts.NewAuthNeededError("password or unlock")
ErrNoMatch = errors.New("no key for given address or file")
ErrDecrypt = errors.New("could not decrypt key with given passphrase")
)
// BackendType can be used to query the account manager for encrypted keystores.
var BackendType = reflect.TypeOf(new(KeyStore))
// KeyStoreType is the reflect type of a keystore backend.
var KeyStoreType = reflect.TypeOf(&KeyStore{})
// Maximum time between wallet refreshes (if filesystem notifications don't work).
const walletRefreshCycle = 3 * time.Second
// KeyStore manages a key storage directory on disk.
type KeyStore struct {
cache *addressCache
keyStore keyStore
mu sync.RWMutex
unlocked map[common.Address]*unlocked
storage keyStore // Storage backend, might be cleartext or encrypted
cache *accountCache // In-memory account cache over the filesystem storage
changes chan struct{} // Channel receiving change notifications from the cache
unlocked map[common.Address]*unlocked // Currently unlocked account (decrypted private keys)
wallets []accounts.Wallet // Wallet wrappers around the individual key files
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
mu sync.RWMutex
}
type unlocked struct {
@ -64,7 +75,7 @@ type unlocked struct {
// NewKeyStore creates a keystore for the given directory.
func NewKeyStore(keydir string, scryptN, scryptP int) *KeyStore {
keydir, _ = filepath.Abs(keydir)
ks := &KeyStore{keyStore: &keyStorePassphrase{keydir, scryptN, scryptP}}
ks := &KeyStore{storage: &keyStorePassphrase{keydir, scryptN, scryptP}}
ks.init(keydir)
return ks
}
@ -73,20 +84,136 @@ func NewKeyStore(keydir string, scryptN, scryptP int) *KeyStore {
// Deprecated: Use NewKeyStore.
func NewPlaintextKeyStore(keydir string) *KeyStore {
keydir, _ = filepath.Abs(keydir)
ks := &KeyStore{keyStore: &keyStorePlain{keydir}}
ks := &KeyStore{storage: &keyStorePlain{keydir}}
ks.init(keydir)
return ks
}
func (ks *KeyStore) init(keydir string) {
// Lock the mutex since the account cache might call back with events
ks.mu.Lock()
defer ks.mu.Unlock()
// Initialize the set of unlocked keys and the account cache
ks.unlocked = make(map[common.Address]*unlocked)
ks.cache = newAddrCache(keydir)
ks.cache, ks.changes = newAccountCache(keydir)
// TODO: In order for this finalizer to work, there must be no references
// to ks. addressCache doesn't keep a reference but unlocked keys do,
// so the finalizer will not trigger until all timed unlocks have expired.
runtime.SetFinalizer(ks, func(m *KeyStore) {
m.cache.close()
})
// Create the initial list of wallets from the cache
accs := ks.cache.accounts()
ks.wallets = make([]accounts.Wallet, len(accs))
for i := 0; i < len(accs); i++ {
ks.wallets[i] = &keystoreWallet{account: accs[i], keystore: ks}
}
}
// Wallets implements accounts.Backend, returning all single-key wallets from the
// keystore directory.
func (ks *KeyStore) Wallets() []accounts.Wallet {
// Make sure the list of wallets is in sync with the account cache
ks.refreshWallets()
ks.mu.RLock()
defer ks.mu.RUnlock()
cpy := make([]accounts.Wallet, len(ks.wallets))
copy(cpy, ks.wallets)
return cpy
}
// refreshWallets retrieves the current account list and based on that does any
// necessary wallet refreshes.
func (ks *KeyStore) refreshWallets() {
// Retrieve the current list of accounts
accs := ks.cache.accounts()
// Transform the current list of wallets into the new one
ks.mu.Lock()
wallets := make([]accounts.Wallet, 0, len(accs))
events := []accounts.WalletEvent{}
for _, account := range accs {
// Drop wallets while they were in front of the next account
for len(ks.wallets) > 0 && ks.wallets[0].URL() < account.URL {
events = append(events, accounts.WalletEvent{Wallet: ks.wallets[0], Arrive: false})
ks.wallets = ks.wallets[1:]
}
// If there are no more wallets or the account is before the next, wrap new wallet
if len(ks.wallets) == 0 || ks.wallets[0].URL() > account.URL {
wallet := &keystoreWallet{account: account, keystore: ks}
events = append(events, accounts.WalletEvent{Wallet: wallet, Arrive: true})
wallets = append(wallets, wallet)
continue
}
// If the account is the same as the first wallet, keep it
if ks.wallets[0].Accounts()[0] == account {
wallets = append(wallets, ks.wallets[0])
ks.wallets = ks.wallets[1:]
continue
}
}
// Drop any leftover wallets and set the new batch
for _, wallet := range ks.wallets {
events = append(events, accounts.WalletEvent{Wallet: wallet, Arrive: false})
}
ks.wallets = wallets
ks.mu.Unlock()
// Fire all wallet events and return
for _, event := range events {
ks.updateFeed.Send(event)
}
}
// Subscribe implements accounts.Backend, creating an async subscription to
// receive notifications on the addition or removal of keystore wallets.
func (ks *KeyStore) Subscribe(sink chan<- accounts.WalletEvent) event.Subscription {
// We need the mutex to reliably start/stop the update loop
ks.mu.Lock()
defer ks.mu.Unlock()
// Subscribe the caller and track the subscriber count
sub := ks.updateScope.Track(ks.updateFeed.Subscribe(sink))
// Subscribers require an active notification loop, start it
if !ks.updating {
ks.updating = true
go ks.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 (ks *KeyStore) updater() {
for {
// Wait for an account update or a refresh timeout
select {
case <-ks.changes:
case <-time.After(walletRefreshCycle):
}
// Run the wallet refresher
ks.refreshWallets()
// If all our subscribers left, stop the updater
ks.mu.Lock()
if ks.updateScope.Count() == 0 {
ks.updating = false
ks.mu.Unlock()
return
}
ks.mu.Unlock()
}
}
// HasAddress reports whether a key with the given address is present.
@ -118,6 +245,7 @@ func (ks *KeyStore) Delete(a accounts.Account, passphrase string) error {
err = os.Remove(a.URL)
if err == nil {
ks.cache.delete(a)
ks.refreshWallets()
}
return err
}
@ -131,7 +259,7 @@ func (ks *KeyStore) SignHash(a accounts.Account, hash []byte) ([]byte, error) {
unlockedKey, found := ks.unlocked[a.Address]
if !found {
return nil, ErrNeedPasswordOrUnlock
return nil, ErrLocked
}
// Sign the hash using plain ECDSA operations
return crypto.Sign(hash, unlockedKey.PrivateKey)
@ -145,7 +273,7 @@ func (ks *KeyStore) SignTx(a accounts.Account, tx *types.Transaction, chainID *b
unlockedKey, found := ks.unlocked[a.Address]
if !found {
return nil, ErrNeedPasswordOrUnlock
return nil, ErrLocked
}
// Depending on the presence of the chain ID, sign with EIP155 or homestead
if chainID != nil {
@ -221,10 +349,9 @@ func (ks *KeyStore) TimedUnlock(a accounts.Account, passphrase string, timeout t
// it with a timeout would be confusing.
zeroKey(key.PrivateKey)
return nil
} else {
// Terminate the expire goroutine and replace it below.
close(u.abort)
}
// Terminate the expire goroutine and replace it below.
close(u.abort)
}
if timeout > 0 {
u = &unlocked{Key: key, abort: make(chan struct{})}
@ -250,7 +377,7 @@ func (ks *KeyStore) getDecryptedKey(a accounts.Account, auth string) (accounts.A
if err != nil {
return a, nil, err
}
key, err := ks.keyStore.GetKey(a.Address, a.URL, auth)
key, err := ks.storage.GetKey(a.Address, a.URL, auth)
return a, key, err
}
@ -277,13 +404,14 @@ func (ks *KeyStore) expire(addr common.Address, u *unlocked, timeout time.Durati
// NewAccount generates a new key and stores it into the key directory,
// encrypting it with the passphrase.
func (ks *KeyStore) NewAccount(passphrase string) (accounts.Account, error) {
_, account, err := storeNewKey(ks.keyStore, crand.Reader, passphrase)
_, account, err := storeNewKey(ks.storage, crand.Reader, passphrase)
if err != nil {
return accounts.Account{}, err
}
// Add the account to the cache immediately rather
// than waiting for file system notifications to pick it up.
ks.cache.add(account)
ks.refreshWallets()
return account, nil
}
@ -294,7 +422,7 @@ func (ks *KeyStore) Export(a accounts.Account, passphrase, newPassphrase string)
return nil, err
}
var N, P int
if store, ok := ks.keyStore.(*keyStorePassphrase); ok {
if store, ok := ks.storage.(*keyStorePassphrase); ok {
N, P = store.scryptN, store.scryptP
} else {
N, P = StandardScryptN, StandardScryptP
@ -325,11 +453,12 @@ func (ks *KeyStore) ImportECDSA(priv *ecdsa.PrivateKey, passphrase string) (acco
}
func (ks *KeyStore) importKey(key *Key, passphrase string) (accounts.Account, error) {
a := accounts.Account{Address: key.Address, URL: ks.keyStore.JoinPath(keyFileName(key.Address))}
if err := ks.keyStore.StoreKey(a.URL, key, passphrase); err != nil {
a := accounts.Account{Address: key.Address, URL: ks.storage.JoinPath(keyFileName(key.Address))}
if err := ks.storage.StoreKey(a.URL, key, passphrase); err != nil {
return accounts.Account{}, err
}
ks.cache.add(a)
ks.refreshWallets()
return a, nil
}
@ -339,17 +468,18 @@ func (ks *KeyStore) Update(a accounts.Account, passphrase, newPassphrase string)
if err != nil {
return err
}
return ks.keyStore.StoreKey(a.URL, key, newPassphrase)
return ks.storage.StoreKey(a.URL, key, newPassphrase)
}
// ImportPreSaleKey decrypts the given Ethereum presale wallet and stores
// a key file in the key directory. The key file is encrypted with the same passphrase.
func (ks *KeyStore) ImportPreSaleKey(keyJSON []byte, passphrase string) (accounts.Account, error) {
a, _, err := importPreSaleKey(ks.keyStore, keyJSON, passphrase)
a, _, err := importPreSaleKey(ks.storage, keyJSON, passphrase)
if err != nil {
return a, err
}
ks.cache.add(a)
ks.refreshWallets()
return a, nil
}