status-go/account/accounts.go

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package account
import (
"crypto/ecdsa"
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"encoding/json"
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"errors"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"sync"
"github.com/google/uuid"
gethkeystore "github.com/ethereum/go-ethereum/accounts/keystore"
gethcommon "github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/log"
"github.com/status-im/status-go/account/generator"
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"github.com/status-im/status-go/eth-node/crypto"
"github.com/status-im/status-go/eth-node/keystore"
"github.com/status-im/status-go/eth-node/types"
"github.com/status-im/status-go/extkeys"
)
// errors
var (
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ErrAddressToAccountMappingFailure = errors.New("cannot retrieve a valid account for a given address")
ErrAccountToKeyMappingFailure = errors.New("cannot retrieve a valid key for a given account")
ErrNoAccountSelected = errors.New("no account has been selected, please login")
ErrInvalidMasterKeyCreated = errors.New("can not create master extended key")
ErrOnboardingNotStarted = errors.New("onboarding must be started before choosing an account")
ErrOnboardingAccountNotFound = errors.New("cannot find onboarding account with the given id")
ErrAccountKeyStoreMissing = errors.New("account key store is not set")
)
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type ErrCannotLocateKeyFile struct {
Msg string
}
func (e ErrCannotLocateKeyFile) Error() string {
return e.Msg
}
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var zeroAddress = types.Address{}
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// Manager represents account manager interface.
type Manager struct {
mu sync.RWMutex
keystore types.KeyStore
accountsGenerator *generator.Generator
onboarding *Onboarding
selectedChatAccount *SelectedExtKey // account that was processed during the last call to SelectAccount()
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mainAccountAddress types.Address
watchAddresses []types.Address
}
// GetKeystore is only used in tests
func (m *Manager) GetKeystore() types.KeyStore {
m.mu.RLock()
defer m.mu.RUnlock()
return m.keystore
}
// AccountsGenerator returns accountsGenerator.
func (m *Manager) AccountsGenerator() *generator.Generator {
return m.accountsGenerator
}
// CreateAccount creates an internal geth account
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// BIP44-compatible keys are generated: CKD#1 is stored as account key, CKD#2 stored as sub-account root
// Public key of CKD#1 is returned, with CKD#2 securely encoded into account key file (to be used for
// sub-account derivations)
func (m *Manager) CreateAccount(password string) (generator.GeneratedAccountInfo, Info, string, error) {
var mkInfo generator.GeneratedAccountInfo
info := Info{}
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// generate mnemonic phrase
mn := extkeys.NewMnemonic()
mnemonic, err := mn.MnemonicPhrase(extkeys.EntropyStrength128, extkeys.EnglishLanguage)
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if err != nil {
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return mkInfo, info, "", fmt.Errorf("can not create mnemonic seed: %v", err)
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}
// Generate extended master key (see BIP32)
// We call extkeys.NewMaster with a seed generated with the 12 mnemonic words
// but without using the optional password as an extra entropy as described in BIP39.
// Future ideas/iterations in Status can add an an advanced options
// for expert users, to be able to add a passphrase to the generation of the seed.
extKey, err := extkeys.NewMaster(mn.MnemonicSeed(mnemonic, ""))
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if err != nil {
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return mkInfo, info, "", fmt.Errorf("can not create master extended key: %v", err)
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}
acc := generator.NewAccount(nil, extKey)
mkInfo = acc.ToGeneratedAccountInfo("", mnemonic)
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// import created key into account keystore
info.WalletAddress, info.WalletPubKey, err = m.importExtendedKey(extkeys.KeyPurposeWallet, extKey, password)
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if err != nil {
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return mkInfo, info, "", err
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}
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info.ChatAddress = info.WalletAddress
info.ChatPubKey = info.WalletPubKey
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return mkInfo, info, mnemonic, nil
}
// RecoverAccount re-creates master key using given details.
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// Once master key is re-generated, it is inserted into keystore (if not already there).
func (m *Manager) RecoverAccount(password, mnemonic string) (Info, error) {
info := Info{}
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// re-create extended key (see BIP32)
mn := extkeys.NewMnemonic()
extKey, err := extkeys.NewMaster(mn.MnemonicSeed(mnemonic, ""))
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if err != nil {
return info, ErrInvalidMasterKeyCreated
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}
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// import re-created key into account keystore
info.WalletAddress, info.WalletPubKey, err = m.importExtendedKey(extkeys.KeyPurposeWallet, extKey, password)
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if err != nil {
return info, err
}
info.ChatAddress = info.WalletAddress
info.ChatPubKey = info.WalletPubKey
return info, nil
}
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// VerifyAccountPassword tries to decrypt a given account key file, with a provided password.
// If no error is returned, then account is considered verified.
func (m *Manager) VerifyAccountPassword(keyStoreDir, address, password string) (*types.Key, error) {
var err error
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var foundKeyFile []byte
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addressObj := types.BytesToAddress(types.FromHex(address))
checkAccountKey := func(path string, fileInfo os.FileInfo) error {
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if len(foundKeyFile) > 0 || fileInfo.IsDir() {
return nil
}
rawKeyFile, e := ioutil.ReadFile(path)
if e != nil {
return fmt.Errorf("invalid account key file: %v", e)
}
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var accountKey struct {
Address string `json:"address"`
}
if e := json.Unmarshal(rawKeyFile, &accountKey); e != nil {
return fmt.Errorf("failed to read key file: %s", e)
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}
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if types.HexToAddress("0x"+accountKey.Address).Hex() == addressObj.Hex() {
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foundKeyFile = rawKeyFile
}
return nil
}
// locate key within key store directory (address should be within the file)
err = filepath.Walk(keyStoreDir, func(path string, fileInfo os.FileInfo, err error) error {
if err != nil {
return err
}
return checkAccountKey(path, fileInfo)
})
if err != nil {
return nil, fmt.Errorf("cannot traverse key store folder: %v", err)
}
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if len(foundKeyFile) == 0 {
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return nil, &ErrCannotLocateKeyFile{fmt.Sprintf("cannot locate account for address: %s", addressObj.Hex())}
}
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key, err := keystore.DecryptKey(foundKeyFile, password)
if err != nil {
return nil, err
}
// avoid swap attack
if key.Address != addressObj {
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return nil, fmt.Errorf("account mismatch: have %s, want %s", key.Address.Hex(), addressObj.Hex())
}
return key, nil
}
// SelectAccount selects current account, by verifying that address has corresponding account which can be decrypted
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// using provided password. Once verification is done, all previous identities are removed).
func (m *Manager) SelectAccount(loginParams LoginParams) error {
m.mu.Lock()
defer m.mu.Unlock()
m.accountsGenerator.Reset()
selectedChatAccount, err := m.unlockExtendedKey(loginParams.ChatAddress.String(), loginParams.Password)
if err != nil {
return err
}
m.watchAddresses = loginParams.WatchAddresses
m.mainAccountAddress = loginParams.MainAccount
m.selectedChatAccount = selectedChatAccount
return nil
}
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func (m *Manager) SetAccountAddresses(main types.Address, secondary ...types.Address) {
m.watchAddresses = []types.Address{main}
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m.watchAddresses = append(m.watchAddresses, secondary...)
m.mainAccountAddress = main
}
// SetChatAccount initializes selectedChatAccount with privKey
func (m *Manager) SetChatAccount(privKey *ecdsa.PrivateKey) error {
m.mu.Lock()
defer m.mu.Unlock()
address := crypto.PubkeyToAddress(privKey.PublicKey)
id, err := uuid.NewRandom()
if err != nil {
return err
}
key := &types.Key{
ID: id,
Address: address,
PrivateKey: privKey,
}
m.selectedChatAccount = &SelectedExtKey{
Address: address,
AccountKey: key,
}
return nil
}
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// MainAccountAddress returns main account address set during login
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func (m *Manager) MainAccountAddress() (types.Address, error) {
m.mu.RLock()
defer m.mu.RUnlock()
if m.mainAccountAddress == zeroAddress {
return zeroAddress, ErrNoAccountSelected
}
return m.mainAccountAddress, nil
}
// WatchAddresses returns currently selected watch addresses.
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func (m *Manager) WatchAddresses() []types.Address {
m.mu.RLock()
defer m.mu.RUnlock()
return m.watchAddresses
}
// SelectedChatAccount returns currently selected chat account
func (m *Manager) SelectedChatAccount() (*SelectedExtKey, error) {
m.mu.RLock()
defer m.mu.RUnlock()
if m.selectedChatAccount == nil {
return nil, ErrNoAccountSelected
}
return m.selectedChatAccount, nil
}
// Logout clears selected accounts.
func (m *Manager) Logout() {
m.mu.Lock()
defer m.mu.Unlock()
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m.accountsGenerator.Reset()
m.mainAccountAddress = zeroAddress
m.watchAddresses = nil
m.selectedChatAccount = nil
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}
// ImportAccount imports the account specified with privateKey.
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func (m *Manager) ImportAccount(privateKey *ecdsa.PrivateKey, password string) (types.Address, error) {
if m.keystore == nil {
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return types.Address{}, ErrAccountKeyStoreMissing
}
account, err := m.keystore.ImportECDSA(privateKey, password)
return account.Address, err
}
// ImportSingleExtendedKey imports an extended key setting it in both the PrivateKey and ExtendedKey fields
// of the Key struct.
// ImportExtendedKey is used in older version of Status where PrivateKey is set to be the BIP44 key at index 0,
// and ExtendedKey is the extended key of the BIP44 key at index 1.
func (m *Manager) ImportSingleExtendedKey(extKey *extkeys.ExtendedKey, password string) (address, pubKey string, err error) {
if m.keystore == nil {
return "", "", ErrAccountKeyStoreMissing
}
// imports extended key, create key file (if necessary)
account, err := m.keystore.ImportSingleExtendedKey(extKey, password)
if err != nil {
return "", "", err
}
address = account.Address.Hex()
// obtain public key to return
account, key, err := m.keystore.AccountDecryptedKey(account, password)
if err != nil {
return address, "", err
}
pubKey = types.EncodeHex(crypto.FromECDSAPub(&key.PrivateKey.PublicKey))
return
}
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// importExtendedKey processes incoming extended key, extracts required info and creates corresponding account key.
// Once account key is formed, that key is put (if not already) into keystore i.e. key is *encoded* into key file.
func (m *Manager) importExtendedKey(keyPurpose extkeys.KeyPurpose, extKey *extkeys.ExtendedKey, password string) (address, pubKey string, err error) {
if m.keystore == nil {
return "", "", ErrAccountKeyStoreMissing
}
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// imports extended key, create key file (if necessary)
account, err := m.keystore.ImportExtendedKeyForPurpose(keyPurpose, extKey, password)
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if err != nil {
return "", "", err
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}
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address = account.Address.Hex()
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// obtain public key to return
account, key, err := m.keystore.AccountDecryptedKey(account, password)
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if err != nil {
return address, "", err
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}
pubKey = types.EncodeHex(crypto.FromECDSAPub(&key.PrivateKey.PublicKey))
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return
}
// Accounts returns list of addresses for selected account, including
// subaccounts.
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func (m *Manager) Accounts() ([]types.Address, error) {
m.mu.RLock()
defer m.mu.RUnlock()
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addresses := make([]types.Address, 0)
if m.mainAccountAddress != zeroAddress {
addresses = append(addresses, m.mainAccountAddress)
}
return addresses, nil
}
// StartOnboarding starts the onboarding process generating accountsCount accounts and returns a slice of OnboardingAccount.
func (m *Manager) StartOnboarding(accountsCount, mnemonicPhraseLength int) ([]*OnboardingAccount, error) {
m.mu.Lock()
defer m.mu.Unlock()
onboarding, err := NewOnboarding(accountsCount, mnemonicPhraseLength)
if err != nil {
return nil, err
}
m.onboarding = onboarding
return m.onboarding.Accounts(), nil
}
// RemoveOnboarding reset the current onboarding struct setting it to nil and deleting the accounts from memory.
func (m *Manager) RemoveOnboarding() {
m.mu.Lock()
defer m.mu.Unlock()
m.onboarding = nil
}
// ImportOnboardingAccount imports the account specified by id and encrypts it with password.
func (m *Manager) ImportOnboardingAccount(id string, password string) (Info, string, error) {
var info Info
m.mu.Lock()
defer m.mu.Unlock()
if m.onboarding == nil {
return info, "", ErrOnboardingNotStarted
}
acc, err := m.onboarding.Account(id)
if err != nil {
return info, "", err
}
info, err = m.RecoverAccount(password, acc.mnemonic)
if err != nil {
return info, "", err
}
m.onboarding = nil
return info, acc.mnemonic, nil
}
// AddressToDecryptedAccount tries to load decrypted key for a given account.
// The running node, has a keystore directory which is loaded on start. Key file
// for a given address is expected to be in that directory prior to node start.
func (m *Manager) AddressToDecryptedAccount(address, password string) (types.Account, *types.Key, error) {
if m.keystore == nil {
return types.Account{}, nil, ErrAccountKeyStoreMissing
}
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account, err := ParseAccountString(address)
if err != nil {
return types.Account{}, nil, ErrAddressToAccountMappingFailure
}
account, key, err := m.keystore.AccountDecryptedKey(account, password)
if err != nil {
err = fmt.Errorf("%s: %s", ErrAccountToKeyMappingFailure, err)
}
return account, key, err
}
func (m *Manager) unlockExtendedKey(address, password string) (*SelectedExtKey, error) {
account, accountKey, err := m.AddressToDecryptedAccount(address, password)
if err != nil {
return nil, err
}
selectedExtendedKey := &SelectedExtKey{
Address: account.Address,
AccountKey: accountKey,
}
return selectedExtendedKey, nil
}
func (m *Manager) MigrateKeyStoreDir(oldDir, newDir string, addresses []string) error {
paths := []string{}
addressesMap := map[string]struct{}{}
for _, address := range addresses {
addressesMap[address] = struct{}{}
}
checkFile := func(path string, fileInfo os.FileInfo) error {
if fileInfo.IsDir() || filepath.Dir(path) != oldDir {
return nil
}
rawKeyFile, err := ioutil.ReadFile(path)
if err != nil {
return fmt.Errorf("invalid account key file: %v", err)
}
var accountKey struct {
Address string `json:"address"`
}
if err := json.Unmarshal(rawKeyFile, &accountKey); err != nil {
return fmt.Errorf("failed to read key file: %s", err)
}
address := types.HexToAddress("0x" + accountKey.Address).Hex()
if _, ok := addressesMap[address]; ok {
paths = append(paths, path)
}
return nil
}
err := filepath.Walk(oldDir, func(path string, fileInfo os.FileInfo, err error) error {
if err != nil {
return err
}
return checkFile(path, fileInfo)
})
if err != nil {
return fmt.Errorf("cannot traverse key store folder: %v", err)
}
for _, path := range paths {
_, fileName := filepath.Split(path)
newPath := filepath.Join(newDir, fileName)
err := os.Rename(path, newPath)
if err != nil {
return err
}
}
return nil
}
func (m *Manager) ReEncryptKey(rawKey []byte, pass string, newPass string) (reEncryptedKey []byte, e error) {
cryptoJSON, e := keystore.RawKeyToCryptoJSON(rawKey)
if e != nil {
return reEncryptedKey, fmt.Errorf("convert to crypto json error: %v", e)
}
decryptedKey, e := keystore.DecryptKey(rawKey, pass)
if e != nil {
return reEncryptedKey, fmt.Errorf("decryption error: %v", e)
}
if cryptoJSON.KDFParams["n"] == nil || cryptoJSON.KDFParams["p"] == nil {
return reEncryptedKey, fmt.Errorf("Unable to determine `n` or `p`: %v", e)
}
n := int(cryptoJSON.KDFParams["n"].(float64))
p := int(cryptoJSON.KDFParams["p"].(float64))
gethKey := gethkeystore.Key{
Id: decryptedKey.ID,
Address: gethcommon.Address(decryptedKey.Address),
PrivateKey: decryptedKey.PrivateKey,
ExtendedKey: decryptedKey.ExtendedKey,
SubAccountIndex: decryptedKey.SubAccountIndex,
}
return gethkeystore.EncryptKey(&gethKey, newPass, n, p)
}
func (m *Manager) ReEncryptKeyStoreDir(keyDirPath, oldPass, newPass string) error {
rencryptFileAtPath := func(tempKeyDirPath, path string, fileInfo os.FileInfo) error {
if fileInfo.IsDir() {
return nil
}
rawKeyFile, e := ioutil.ReadFile(path)
if e != nil {
return fmt.Errorf("invalid account key file: %v", e)
}
reEncryptedKey, e := m.ReEncryptKey(rawKeyFile, oldPass, newPass)
if e != nil {
return fmt.Errorf("unable to re-encrypt key file: %v, path: %s, name: %s", e, path, fileInfo.Name())
}
tempWritePath := filepath.Join(tempKeyDirPath, fileInfo.Name())
e = ioutil.WriteFile(tempWritePath, reEncryptedKey, fileInfo.Mode().Perm())
if e != nil {
return fmt.Errorf("unable write key file: %v", e)
}
return nil
}
keyParent, keyDirName := filepath.Split(keyDirPath)
// backupKeyDirName used to store existing keys before final write
backupKeyDirName := keyDirName + "-backup"
// tempKeyDirName used to put re-encrypted keys
tempKeyDirName := keyDirName + "-re-encrypted"
backupKeyDirPath := filepath.Join(keyParent, backupKeyDirName)
tempKeyDirPath := filepath.Join(keyParent, tempKeyDirName)
// create temp key dir
err := os.MkdirAll(tempKeyDirPath, os.ModePerm)
if err != nil {
return fmt.Errorf("mkdirall error: %v, tempKeyDirPath: %s", err, tempKeyDirPath)
}
err = filepath.Walk(keyDirPath, func(path string, fileInfo os.FileInfo, err error) error {
if err != nil {
os.RemoveAll(tempKeyDirPath)
return fmt.Errorf("walk callback error: %v", err)
}
return rencryptFileAtPath(tempKeyDirPath, path, fileInfo)
})
if err != nil {
os.RemoveAll(tempKeyDirPath)
return fmt.Errorf("walk error: %v", err)
}
// move existing keys
err = os.Rename(keyDirPath, backupKeyDirPath)
if err != nil {
os.RemoveAll(tempKeyDirPath)
return fmt.Errorf("unable to rename keyDirPath to backupKeyDirPath: %v", err)
}
// move tempKeyDirPath to keyDirPath
err = os.Rename(tempKeyDirPath, keyDirPath)
if err != nil {
// if this happens, then the app is probably bricked, because the keystore won't exist anymore
// try to restore from backup
_ = os.Rename(backupKeyDirPath, keyDirPath)
return fmt.Errorf("unable to rename tempKeyDirPath to keyDirPath: %v", err)
}
// remove temp and backup folders and their contents
err = os.RemoveAll(tempKeyDirPath)
if err != nil {
// the re-encryption is complete so we don't throw
log.Error("unable to delete tempKeyDirPath, manual cleanup required")
}
err = os.RemoveAll(backupKeyDirPath)
if err != nil {
// the re-encryption is complete so we don't throw
log.Error("unable to delete backupKeyDirPath, manual cleanup required")
}
return nil
}
func (m *Manager) DeleteAccount(address types.Address, password string) error {
return m.keystore.Delete(types.Account{Address: address}, password)
}