148 lines
6.4 KiB
Go
148 lines
6.4 KiB
Go
// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package keystore
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import (
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"math/big"
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ethereum "github.com/ethereum/go-ethereum"
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"github.com/ethereum/go-ethereum/accounts"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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)
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// keystoreWallet implements the accounts.Wallet interface for the original
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// keystore.
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type keystoreWallet struct {
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account accounts.Account // Single account contained in this wallet
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keystore *KeyStore // Keystore where the account originates from
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}
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// URL implements accounts.Wallet, returning the URL of the account within.
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func (w *keystoreWallet) URL() accounts.URL {
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return w.account.URL
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}
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// Status implements accounts.Wallet, returning whether the account held by the
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// keystore wallet is unlocked or not.
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func (w *keystoreWallet) Status() (string, error) {
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w.keystore.mu.RLock()
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defer w.keystore.mu.RUnlock()
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if _, ok := w.keystore.unlocked[w.account.Address]; ok {
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return "Unlocked", nil
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}
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return "Locked", nil
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}
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// Open implements accounts.Wallet, but is a noop for plain wallets since there
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// is no connection or decryption step necessary to access the list of accounts.
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func (w *keystoreWallet) Open(passphrase string) error { return nil }
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// Close implements accounts.Wallet, but is a noop for plain wallets since there
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// is no meaningful open operation.
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func (w *keystoreWallet) Close() error { return nil }
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// Accounts implements accounts.Wallet, returning an account list consisting of
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// a single account that the plain kestore wallet contains.
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func (w *keystoreWallet) Accounts() []accounts.Account {
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return []accounts.Account{w.account}
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}
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// Contains implements accounts.Wallet, returning whether a particular account is
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// or is not wrapped by this wallet instance.
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func (w *keystoreWallet) Contains(account accounts.Account) bool {
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return account.Address == w.account.Address && (account.URL == (accounts.URL{}) || account.URL == w.account.URL)
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}
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// Derive implements accounts.Wallet, but is a noop for plain wallets since there
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// is no notion of hierarchical account derivation for plain keystore accounts.
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func (w *keystoreWallet) Derive(path accounts.DerivationPath, pin bool) (accounts.Account, error) {
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return accounts.Account{}, accounts.ErrNotSupported
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}
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// SelfDerive implements accounts.Wallet, but is a noop for plain wallets since
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// there is no notion of hierarchical account derivation for plain keystore accounts.
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func (w *keystoreWallet) SelfDerive(base accounts.DerivationPath, chain ethereum.ChainStateReader) {}
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// signHash attempts to sign the given hash with
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// the given account. If the wallet does not wrap this particular account, an
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// error is returned to avoid account leakage (even though in theory we may be
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// able to sign via our shared keystore backend).
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func (w *keystoreWallet) signHash(account accounts.Account, hash []byte) ([]byte, error) {
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// Make sure the requested account is contained within
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if !w.Contains(account) {
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return nil, accounts.ErrUnknownAccount
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}
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// Account seems valid, request the keystore to sign
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return w.keystore.SignHash(account, hash)
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}
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// SignData signs keccak256(data). The mimetype parameter describes the type of data being signed
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func (w *keystoreWallet) SignData(account accounts.Account, mimeType string, data []byte) ([]byte, error) {
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return w.signHash(account, crypto.Keccak256(data))
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}
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// SignDataWithPassphrase signs keccak256(data). The mimetype parameter describes the type of data being signed
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func (w *keystoreWallet) SignDataWithPassphrase(account accounts.Account, passphrase, mimeType string, data []byte) ([]byte, error) {
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// Make sure the requested account is contained within
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if !w.Contains(account) {
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return nil, accounts.ErrUnknownAccount
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}
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// Account seems valid, request the keystore to sign
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return w.keystore.SignHashWithPassphrase(account, passphrase, crypto.Keccak256(data))
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}
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func (w *keystoreWallet) SignText(account accounts.Account, text []byte) ([]byte, error) {
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return w.signHash(account, accounts.TextHash(text))
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}
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// SignHashWithPassphrase implements accounts.Wallet, attempting to sign the
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// given hash with the given account using passphrase as extra authentication.
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func (w *keystoreWallet) SignTextWithPassphrase(account accounts.Account, passphrase string, text []byte) ([]byte, error) {
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// Make sure the requested account is contained within
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if !w.Contains(account) {
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return nil, accounts.ErrUnknownAccount
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}
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// Account seems valid, request the keystore to sign
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return w.keystore.SignHashWithPassphrase(account, passphrase, accounts.TextHash(text))
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}
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// SignTx implements accounts.Wallet, attempting to sign the given transaction
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// with the given account. If the wallet does not wrap this particular account,
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// an error is returned to avoid account leakage (even though in theory we may
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// be able to sign via our shared keystore backend).
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func (w *keystoreWallet) SignTx(account accounts.Account, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
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// Make sure the requested account is contained within
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if !w.Contains(account) {
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return nil, accounts.ErrUnknownAccount
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}
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// Account seems valid, request the keystore to sign
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return w.keystore.SignTx(account, tx, chainID)
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}
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// SignTxWithPassphrase implements accounts.Wallet, attempting to sign the given
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// transaction with the given account using passphrase as extra authentication.
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func (w *keystoreWallet) SignTxWithPassphrase(account accounts.Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
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// Make sure the requested account is contained within
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if !w.Contains(account) {
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return nil, accounts.ErrUnknownAccount
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}
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// Account seems valid, request the keystore to sign
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return w.keystore.SignTxWithPassphrase(account, passphrase, tx, chainID)
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}
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