222 lines
8.3 KiB
Go
222 lines
8.3 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Contains all the wrappers from the accounts package to support client side key
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// management on mobile platforms.
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package geth
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import (
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"errors"
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"time"
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"github.com/ethereum/go-ethereum/accounts"
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"github.com/ethereum/go-ethereum/accounts/keystore"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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)
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const (
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// StandardScryptN is the N parameter of Scrypt encryption algorithm, using 256MB
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// memory and taking approximately 1s CPU time on a modern processor.
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StandardScryptN = int(keystore.StandardScryptN)
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// StandardScryptP is the P parameter of Scrypt encryption algorithm, using 256MB
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// memory and taking approximately 1s CPU time on a modern processor.
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StandardScryptP = int(keystore.StandardScryptP)
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// LightScryptN is the N parameter of Scrypt encryption algorithm, using 4MB
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// memory and taking approximately 100ms CPU time on a modern processor.
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LightScryptN = int(keystore.LightScryptN)
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// LightScryptP is the P parameter of Scrypt encryption algorithm, using 4MB
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// memory and taking approximately 100ms CPU time on a modern processor.
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LightScryptP = int(keystore.LightScryptP)
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)
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// Account represents a stored key.
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type Account struct{ account accounts.Account }
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// Accounts represents a slice of accounts.
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type Accounts struct{ accounts []accounts.Account }
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// Size returns the number of accounts in the slice.
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func (a *Accounts) Size() int {
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return len(a.accounts)
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}
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// Get returns the account at the given index from the slice.
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func (a *Accounts) Get(index int) (account *Account, _ error) {
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if index < 0 || index >= len(a.accounts) {
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return nil, errors.New("index out of bounds")
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}
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return &Account{a.accounts[index]}, nil
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}
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// Set sets the account at the given index in the slice.
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func (a *Accounts) Set(index int, account *Account) error {
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if index < 0 || index >= len(a.accounts) {
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return errors.New("index out of bounds")
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}
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a.accounts[index] = account.account
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return nil
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}
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// GetAddress retrieves the address associated with the account.
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func (a *Account) GetAddress() *Address {
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return &Address{a.account.Address}
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}
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// GetURL retrieves the canonical URL of the account.
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func (a *Account) GetURL() string {
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return a.account.URL.String()
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}
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// KeyStore manages a key storage directory on disk.
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type KeyStore struct{ keystore *keystore.KeyStore }
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// NewKeyStore creates a keystore for the given directory.
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func NewKeyStore(keydir string, scryptN, scryptP int) *KeyStore {
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return &KeyStore{keystore: keystore.NewKeyStore(keydir, scryptN, scryptP)}
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}
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// HasAddress reports whether a key with the given address is present.
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func (ks *KeyStore) HasAddress(address *Address) bool {
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return ks.keystore.HasAddress(address.address)
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}
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// GetAccounts returns all key files present in the directory.
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func (ks *KeyStore) GetAccounts() *Accounts {
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return &Accounts{ks.keystore.Accounts()}
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}
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// DeleteAccount deletes the key matched by account if the passphrase is correct.
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// If a contains no filename, the address must match a unique key.
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func (ks *KeyStore) DeleteAccount(account *Account, passphrase string) error {
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return ks.keystore.Delete(account.account, passphrase)
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}
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// SignHash calculates a ECDSA signature for the given hash. The produced signature
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// is in the [R || S || V] format where V is 0 or 1.
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func (ks *KeyStore) SignHash(address *Address, hash []byte) (signature []byte, _ error) {
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return ks.keystore.SignHash(accounts.Account{Address: address.address}, common.CopyBytes(hash))
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}
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// SignTx signs the given transaction with the requested account.
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func (ks *KeyStore) SignTx(account *Account, tx *Transaction, chainID *BigInt) (*Transaction, error) {
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if chainID == nil { // Null passed from mobile app
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chainID = new(BigInt)
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}
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signed, err := ks.keystore.SignTx(account.account, tx.tx, chainID.bigint)
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if err != nil {
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return nil, err
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}
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return &Transaction{signed}, nil
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}
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// SignHashPassphrase signs hash if the private key matching the given address can
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// be decrypted with the given passphrase. The produced signature is in the
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// [R || S || V] format where V is 0 or 1.
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func (ks *KeyStore) SignHashPassphrase(account *Account, passphrase string, hash []byte) (signature []byte, _ error) {
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return ks.keystore.SignHashWithPassphrase(account.account, passphrase, common.CopyBytes(hash))
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}
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// SignTxPassphrase signs the transaction if the private key matching the
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// given address can be decrypted with the given passphrase.
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func (ks *KeyStore) SignTxPassphrase(account *Account, passphrase string, tx *Transaction, chainID *BigInt) (*Transaction, error) {
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if chainID == nil { // Null passed from mobile app
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chainID = new(BigInt)
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}
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signed, err := ks.keystore.SignTxWithPassphrase(account.account, passphrase, tx.tx, chainID.bigint)
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if err != nil {
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return nil, err
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}
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return &Transaction{signed}, nil
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}
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// Unlock unlocks the given account indefinitely.
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func (ks *KeyStore) Unlock(account *Account, passphrase string) error {
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return ks.keystore.TimedUnlock(account.account, passphrase, 0)
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}
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// Lock removes the private key with the given address from memory.
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func (ks *KeyStore) Lock(address *Address) error {
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return ks.keystore.Lock(address.address)
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}
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// TimedUnlock unlocks the given account with the passphrase. The account stays
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// unlocked for the duration of timeout (nanoseconds). A timeout of 0 unlocks the
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// account until the program exits. The account must match a unique key file.
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//
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// If the account address is already unlocked for a duration, TimedUnlock extends or
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// shortens the active unlock timeout. If the address was previously unlocked
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// indefinitely the timeout is not altered.
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func (ks *KeyStore) TimedUnlock(account *Account, passphrase string, timeout int64) error {
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return ks.keystore.TimedUnlock(account.account, passphrase, time.Duration(timeout))
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}
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// NewAccount generates a new key and stores it into the key directory,
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// encrypting it with the passphrase.
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func (ks *KeyStore) NewAccount(passphrase string) (*Account, error) {
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account, err := ks.keystore.NewAccount(passphrase)
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if err != nil {
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return nil, err
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}
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return &Account{account}, nil
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}
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// UpdateAccount changes the passphrase of an existing account.
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func (ks *KeyStore) UpdateAccount(account *Account, passphrase, newPassphrase string) error {
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return ks.keystore.Update(account.account, passphrase, newPassphrase)
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}
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// ExportKey exports as a JSON key, encrypted with newPassphrase.
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func (ks *KeyStore) ExportKey(account *Account, passphrase, newPassphrase string) (key []byte, _ error) {
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return ks.keystore.Export(account.account, passphrase, newPassphrase)
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}
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// ImportKey stores the given encrypted JSON key into the key directory.
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func (ks *KeyStore) ImportKey(keyJSON []byte, passphrase, newPassphrase string) (account *Account, _ error) {
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acc, err := ks.keystore.Import(common.CopyBytes(keyJSON), passphrase, newPassphrase)
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if err != nil {
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return nil, err
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}
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return &Account{acc}, nil
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}
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// ImportECDSAKey stores the given encrypted JSON key into the key directory.
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func (ks *KeyStore) ImportECDSAKey(key []byte, passphrase string) (account *Account, _ error) {
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privkey, err := crypto.ToECDSA(common.CopyBytes(key))
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if err != nil {
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return nil, err
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}
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acc, err := ks.keystore.ImportECDSA(privkey, passphrase)
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if err != nil {
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return nil, err
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}
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return &Account{acc}, nil
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}
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// ImportPreSaleKey decrypts the given Ethereum presale wallet and stores
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// a key file in the key directory. The key file is encrypted with the same passphrase.
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func (ks *KeyStore) ImportPreSaleKey(keyJSON []byte, passphrase string) (ccount *Account, _ error) {
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account, err := ks.keystore.ImportPreSaleKey(common.CopyBytes(keyJSON), passphrase)
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if err != nil {
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return nil, err
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}
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return &Account{account}, nil
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}
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