mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-25 12:57:18 +00:00
a5b408769a
* v2 fix bugs * better doc * include wallet build fix * fixed broken list test * add round trip recover seed unit test * imports * implement list with tests * add altona flags * tests for unicode * added is valid unicode tests * fixed up tests to ensure wallet is persisted after everything works * resolve confs and integrate medalla testnet * fix build * add medalla * fixed import spacing
480 lines
18 KiB
Go
480 lines
18 KiB
Go
package derived
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import (
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"context"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"path"
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"strconv"
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"sync"
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"github.com/google/uuid"
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"github.com/pkg/errors"
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"github.com/prysmaticlabs/go-ssz"
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validatorpb "github.com/prysmaticlabs/prysm/proto/validator/accounts/v2"
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"github.com/prysmaticlabs/prysm/shared/bls"
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"github.com/prysmaticlabs/prysm/shared/bytesutil"
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"github.com/prysmaticlabs/prysm/shared/depositutil"
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"github.com/prysmaticlabs/prysm/shared/petnames"
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"github.com/prysmaticlabs/prysm/shared/rand"
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"github.com/prysmaticlabs/prysm/shared/roughtime"
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"github.com/prysmaticlabs/prysm/validator/accounts/v2/iface"
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v2keymanager "github.com/prysmaticlabs/prysm/validator/keymanager/v2"
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"github.com/sirupsen/logrus"
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"github.com/tyler-smith/go-bip39"
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util "github.com/wealdtech/go-eth2-util"
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keystorev4 "github.com/wealdtech/go-eth2-wallet-encryptor-keystorev4"
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)
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var log = logrus.WithField("prefix", "derived-keymanager-v2")
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const (
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// TimestampFileName stores a timestamp for account creation as a
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// file for a direct keymanager account.
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TimestampFileName = "created_at.txt"
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// KeystoreFileName exposes the expected filename for the keystore file for an account.
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KeystoreFileName = "keystore.json"
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// EIPVersion used by this derived keymanager implementation.
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EIPVersion = "EIP-2334"
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// WithdrawalKeyDerivationPathTemplate defining the hierarchical path for withdrawal
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// keys for Prysm eth2 validators. According to EIP-2334, the format is as follows:
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// m / purpose / coin_type / account_index / withdrawal_key
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WithdrawalKeyDerivationPathTemplate = "m/12381/3600/%d/0"
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// ValidatingKeyDerivationPathTemplate defining the hierarchical path for validating
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// keys for Prysm eth2 validators. According to EIP-2334, the format is as follows:
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// m / purpose / coin_type / account_index / withdrawal_key / validating_key
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ValidatingKeyDerivationPathTemplate = "m/12381/3600/%d/0/0"
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// DepositTransactionFileName for the encoded, eth1 raw deposit tx data
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// for a validator account.
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DepositTransactionFileName = "deposit_transaction.rlp"
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// DepositDataFileName for the raw, ssz-encoded deposit data object.
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DepositDataFileName = "deposit_data.ssz"
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// EncryptedSeedFileName for persisting a wallet's seed when using a derived keymanager.
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EncryptedSeedFileName = "seed.encrypted.json"
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)
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// Config for a derived keymanager.
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type Config struct {
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DerivedPathStructure string
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DerivedEIPNumber string
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}
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// Keymanager implementation for derived, HD keymanager using EIP-2333 and EIP-2334.
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type Keymanager struct {
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wallet iface.Wallet
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cfg *Config
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mnemonicGenerator SeedPhraseFactory
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keysCache map[[48]byte]bls.SecretKey
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lock sync.RWMutex
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seedCfg *SeedConfig
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seed []byte
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walletPassword string
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}
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// SeedConfig json file representation as a Go struct.
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type SeedConfig struct {
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Crypto map[string]interface{} `json:"crypto"`
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ID string `json:"uuid"`
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NextAccount uint64 `json:"next_account"`
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Version uint `json:"version"`
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Name string `json:"name"`
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}
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// DefaultConfig for a derived keymanager implementation.
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func DefaultConfig() *Config {
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return &Config{
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DerivedPathStructure: "m / purpose / coin_type / account_index / withdrawal_key / validating_key",
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DerivedEIPNumber: EIPVersion,
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}
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}
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// NewKeymanager instantiates a new derived keymanager from configuration options.
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func NewKeymanager(
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ctx context.Context,
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wallet iface.Wallet,
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cfg *Config,
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skipMnemonicConfirm bool,
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password string,
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) (*Keymanager, error) {
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seedConfigFile, err := wallet.ReadEncryptedSeedFromDisk(ctx)
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if err != nil {
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return nil, errors.Wrap(err, "could not read encrypted seed file from disk")
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}
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enc, err := ioutil.ReadAll(seedConfigFile)
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if err != nil {
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return nil, errors.Wrap(err, "could not read seed configuration file contents")
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}
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defer func() {
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if err := seedConfigFile.Close(); err != nil {
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log.Errorf("Could not close keymanager config file: %v", err)
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}
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}()
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seedConfig := &SeedConfig{}
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if err := json.Unmarshal(enc, seedConfig); err != nil {
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return nil, errors.Wrap(err, "could not unmarshal seed configuration")
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}
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decryptor := keystorev4.New()
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seed, err := decryptor.Decrypt(seedConfig.Crypto, []byte(password))
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if err != nil {
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return nil, errors.Wrap(err, "could not decrypt seed configuration with password")
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}
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k := &Keymanager{
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wallet: wallet,
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cfg: cfg,
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mnemonicGenerator: &EnglishMnemonicGenerator{
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skipMnemonicConfirm: skipMnemonicConfirm,
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},
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seedCfg: seedConfig,
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seed: seed,
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walletPassword: password,
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keysCache: make(map[[48]byte]bls.SecretKey),
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}
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// We initialize a cache of public key -> secret keys
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// used to retrieve secrets keys for the accounts via the unlocked wallet.
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// This cache is needed to process Sign requests using a validating public key.
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if err := k.initializeSecretKeysCache(); err != nil {
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return nil, errors.Wrap(err, "could not initialize secret keys cache")
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}
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return k, nil
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}
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// UnmarshalConfigFile attempts to JSON unmarshal a derived keymanager
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// configuration file into the *Config{} struct.
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func UnmarshalConfigFile(r io.ReadCloser) (*Config, error) {
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enc, err := ioutil.ReadAll(r)
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if err != nil {
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return nil, err
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}
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defer func() {
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if err := r.Close(); err != nil {
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log.Errorf("Could not close keymanager config file: %v", err)
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}
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}()
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cfg := &Config{}
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if err := json.Unmarshal(enc, cfg); err != nil {
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return nil, err
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}
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return cfg, nil
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}
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// MarshalConfigFile returns a marshaled configuration file for a keymanager.
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func MarshalConfigFile(ctx context.Context, cfg *Config) ([]byte, error) {
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return json.MarshalIndent(cfg, "", "\t")
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}
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// InitializeWalletSeedFile creates a new, encrypted seed using a password input
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// and persists its encrypted file metadata to disk under the wallet path.
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func InitializeWalletSeedFile(ctx context.Context, password string, skipMnemonicConfirm bool) (*SeedConfig, error) {
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walletSeed := make([]byte, 32)
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n, err := rand.NewGenerator().Read(walletSeed)
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if err != nil {
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return nil, errors.Wrap(err, "could not initialize wallet seed")
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}
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if n != len(walletSeed) {
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return nil, errors.New("could not randomly create seed")
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}
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m := &EnglishMnemonicGenerator{
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skipMnemonicConfirm: skipMnemonicConfirm,
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}
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phrase, err := m.Generate(walletSeed)
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if err != nil {
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return nil, errors.Wrap(err, "could not generate wallet seed")
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}
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if err := m.ConfirmAcknowledgement(phrase); err != nil {
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return nil, errors.Wrap(err, "could not confirm mnemonic acknowledgement")
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}
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encryptor := keystorev4.New()
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cryptoFields, err := encryptor.Encrypt(walletSeed, []byte(password))
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if err != nil {
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return nil, errors.Wrap(err, "could not encrypt seed phrase into keystore")
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}
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id, err := uuid.NewRandom()
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if err != nil {
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return nil, errors.Wrap(err, "could not generate unique UUID")
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}
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return &SeedConfig{
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Crypto: cryptoFields,
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ID: id.String(),
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NextAccount: 0,
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Version: encryptor.Version(),
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Name: encryptor.Name(),
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}, nil
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}
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// SeedFileFromMnemonic uses the provided mnemonic seed phrase to generate the
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// appropriate seed file for recovering a derived wallets.
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func SeedFileFromMnemonic(ctx context.Context, mnemonic string, password string) (*SeedConfig, error) {
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walletSeed, err := bip39.EntropyFromMnemonic(mnemonic)
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if err != nil {
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return nil, errors.Wrap(err, "could not convert mnemonic to wallet seed")
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}
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encryptor := keystorev4.New()
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cryptoFields, err := encryptor.Encrypt(walletSeed, []byte(password))
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if err != nil {
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return nil, errors.Wrap(err, "could not encrypt seed phrase into keystore")
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}
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id, err := uuid.NewRandom()
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if err != nil {
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return nil, errors.Wrap(err, "could not generate unique UUID")
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}
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return &SeedConfig{
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Crypto: cryptoFields,
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ID: id.String(),
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NextAccount: 0,
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Version: encryptor.Version(),
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Name: encryptor.Name(),
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}, nil
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}
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// MarshalEncryptedSeedFile json encodes the seed configuration for a derived keymanager.
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func MarshalEncryptedSeedFile(ctx context.Context, seedCfg *SeedConfig) ([]byte, error) {
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return json.MarshalIndent(seedCfg, "", "\t")
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}
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// Config returns the derived keymanager configuration.
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func (dr *Keymanager) Config() *Config {
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return dr.cfg
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}
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// NextAccountNumber managed by the derived keymanager.
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func (dr *Keymanager) NextAccountNumber(ctx context.Context) uint64 {
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return dr.seedCfg.NextAccount
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}
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// ValidatingAccountNames for the derived keymanager.
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func (dr *Keymanager) ValidatingAccountNames(ctx context.Context) ([]string, error) {
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names := make([]string, 0)
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for i := uint64(0); i < dr.seedCfg.NextAccount; i++ {
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validatingKeyPath := fmt.Sprintf(ValidatingKeyDerivationPathTemplate, i)
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validatingKey, err := util.PrivateKeyFromSeedAndPath(dr.seed, validatingKeyPath)
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if err != nil {
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return nil, errors.Wrap(err, "could not derive validating key")
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}
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names = append(names, petnames.DeterministicName(validatingKey.Marshal(), "-"))
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}
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return names, nil
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}
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// CreateAccount for a derived keymanager implementation. This utilizes
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// the EIP-2335 keystore standard for BLS12-381 keystores. It uses the EIP-2333 and EIP-2334
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// for hierarchical derivation of BLS secret keys and a common derivation path structure for
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// persisting accounts to disk. Each account stores the generated keystore.json file.
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// The entire derived wallet seed phrase can be recovered from a BIP-39 english mnemonic.
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func (dr *Keymanager) CreateAccount(ctx context.Context) (string, error) {
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withdrawalKeyPath := fmt.Sprintf(WithdrawalKeyDerivationPathTemplate, dr.seedCfg.NextAccount)
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validatingKeyPath := fmt.Sprintf(ValidatingKeyDerivationPathTemplate, dr.seedCfg.NextAccount)
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withdrawalKey, err := util.PrivateKeyFromSeedAndPath(dr.seed, withdrawalKeyPath)
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if err != nil {
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return "", errors.Wrapf(err, "failed to create withdrawal key for account %d", dr.seedCfg.NextAccount)
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}
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validatingKey, err := util.PrivateKeyFromSeedAndPath(dr.seed, validatingKeyPath)
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if err != nil {
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return "", errors.Wrapf(err, "failed to create validating key for account %d", dr.seedCfg.NextAccount)
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}
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// Create encrypted keystores for both the withdrawal and validating keys.
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encodedWithdrawalKeystore, err := dr.generateKeystoreFile(
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withdrawalKey.Marshal(),
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withdrawalKey.PublicKey().Marshal(),
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dr.walletPassword,
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)
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if err != nil {
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return "", errors.Wrap(err, "could not generate keystore file for withdrawal account")
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}
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encodedValidatingKeystore, err := dr.generateKeystoreFile(
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validatingKey.Marshal(),
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validatingKey.PublicKey().Marshal(),
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dr.walletPassword,
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)
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if err != nil {
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return "", errors.Wrap(err, "could not generate keystore file for validating account")
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}
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// Write both keystores to disk at their respective derived paths.
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if err := dr.wallet.WriteFileAtPath(ctx, withdrawalKeyPath, KeystoreFileName, encodedWithdrawalKeystore); err != nil {
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return "", errors.Wrapf(err, "could not write keystore file for account %d", dr.seedCfg.NextAccount)
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}
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if err := dr.wallet.WriteFileAtPath(ctx, validatingKeyPath, KeystoreFileName, encodedValidatingKeystore); err != nil {
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return "", errors.Wrapf(err, "could not write keystore file for account %d", dr.seedCfg.NextAccount)
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}
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// Upon confirmation of the withdrawal key, proceed to display
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// and write associated deposit data to disk.
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blsValidatingKey, err := bls.SecretKeyFromBytes(validatingKey.Marshal())
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if err != nil {
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return "", err
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}
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blsWithdrawalKey, err := bls.SecretKeyFromBytes(withdrawalKey.Marshal())
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if err != nil {
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return "", err
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}
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tx, depositData, err := depositutil.GenerateDepositTransaction(blsValidatingKey, blsWithdrawalKey)
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if err != nil {
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return "", errors.Wrap(err, "could not generate deposit transaction data")
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}
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// Log the deposit transaction data to the user.
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depositutil.LogDepositTransaction(log, tx)
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// We write the raw deposit transaction as an .rlp encoded file.
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if err := dr.wallet.WriteFileAtPath(ctx, withdrawalKeyPath, DepositTransactionFileName, tx.Data()); err != nil {
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return "", errors.Wrapf(err, "could not write for account %s: %s", withdrawalKeyPath, DepositTransactionFileName)
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}
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// We write the ssz-encoded deposit data to disk as a .ssz file.
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encodedDepositData, err := ssz.Marshal(depositData)
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if err != nil {
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return "", errors.Wrap(err, "could not marshal deposit data")
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}
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if err := dr.wallet.WriteFileAtPath(ctx, withdrawalKeyPath, DepositDataFileName, encodedDepositData); err != nil {
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return "", errors.Wrapf(err, "could not write for account %s: %s", withdrawalKeyPath, encodedDepositData)
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}
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// Finally, write the account creation timestamps as a files.
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createdAt := roughtime.Now().Unix()
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createdAtStr := strconv.FormatInt(createdAt, 10)
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if err := dr.wallet.WriteFileAtPath(ctx, withdrawalKeyPath, TimestampFileName, []byte(createdAtStr)); err != nil {
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return "", errors.Wrapf(err, "could not write timestamp file for account %d", dr.seedCfg.NextAccount)
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}
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if err := dr.wallet.WriteFileAtPath(ctx, validatingKeyPath, TimestampFileName, []byte(createdAtStr)); err != nil {
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return "", errors.Wrapf(err, "could not write timestamp file for account %d", dr.seedCfg.NextAccount)
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}
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newAccountNumber := dr.seedCfg.NextAccount
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log.WithFields(logrus.Fields{
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"accountNumber": newAccountNumber,
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"withdrawalPublicKey": fmt.Sprintf("%#x", withdrawalKey.PublicKey().Marshal()),
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"validatingPublicKey": fmt.Sprintf("%#x", validatingKey.PublicKey().Marshal()),
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"withdrawalKeyPath": path.Join(dr.wallet.AccountsDir(), withdrawalKeyPath),
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"validatingKeyPath": path.Join(dr.wallet.AccountsDir(), validatingKeyPath),
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}).Info("Successfully created new validator account")
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dr.seedCfg.NextAccount++
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encodedCfg, err := MarshalEncryptedSeedFile(ctx, dr.seedCfg)
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if err != nil {
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return "", errors.Wrap(err, "could not marshal encrypted seed file")
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}
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if err := dr.wallet.WriteEncryptedSeedToDisk(ctx, encodedCfg); err != nil {
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return "", errors.Wrap(err, "could not write encrypted seed file to disk")
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}
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return fmt.Sprintf("%d", newAccountNumber), nil
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}
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// Sign signs a message using a validator key.
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func (dr *Keymanager) Sign(ctx context.Context, req *validatorpb.SignRequest) (bls.Signature, error) {
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rawPubKey := req.PublicKey
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if rawPubKey == nil {
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return nil, errors.New("nil public key in request")
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}
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dr.lock.RLock()
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defer dr.lock.RUnlock()
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secretKey, ok := dr.keysCache[bytesutil.ToBytes48(rawPubKey)]
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if !ok {
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return nil, errors.New("no signing key found in keys cache")
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}
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return secretKey.Sign(req.SigningRoot), nil
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}
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// FetchValidatingPublicKeys fetches the list of validating public keys from the keymanager.
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func (dr *Keymanager) FetchValidatingPublicKeys(ctx context.Context) ([][48]byte, error) {
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// Return the public keys from the cache if they match the
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// number of accounts from the wallet.
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publicKeys := make([][48]byte, dr.seedCfg.NextAccount)
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dr.lock.RLock()
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defer dr.lock.RUnlock()
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if dr.keysCache != nil && uint64(len(dr.keysCache)) == dr.seedCfg.NextAccount {
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var i int
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for k := range dr.keysCache {
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publicKeys[i] = k
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i++
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}
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return publicKeys, nil
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}
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for i := uint64(0); i < dr.seedCfg.NextAccount; i++ {
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validatingKeyPath := fmt.Sprintf(ValidatingKeyDerivationPathTemplate, i)
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validatingKeystore, err := dr.wallet.ReadFileAtPath(ctx, validatingKeyPath, KeystoreFileName)
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if err != nil {
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return nil, err
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}
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keystoreFile := &v2keymanager.Keystore{}
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if err := json.Unmarshal(validatingKeystore, keystoreFile); err != nil {
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return nil, errors.Wrapf(err, "could not decode keystore json for account: %s", validatingKeyPath)
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}
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pubKeyBytes, err := hex.DecodeString(keystoreFile.Pubkey)
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if err != nil {
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return nil, errors.Wrapf(err, "could not decode pubkey bytes: %#x", keystoreFile.Pubkey)
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}
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publicKeys = append(publicKeys, bytesutil.ToBytes48(pubKeyBytes))
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}
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return publicKeys, nil
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}
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// FetchWithdrawalPublicKeys fetches the list of withdrawal public keys from keymanager
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func (dr *Keymanager) FetchWithdrawalPublicKeys(ctx context.Context) ([][48]byte, error) {
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publicKeys := make([][48]byte, 0)
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for i := uint64(0); i < dr.seedCfg.NextAccount; i++ {
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withdrawalKeyPath := fmt.Sprintf(WithdrawalKeyDerivationPathTemplate, i)
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withdrawalKeystore, err := dr.wallet.ReadFileAtPath(ctx, withdrawalKeyPath, KeystoreFileName)
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if err != nil {
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return nil, err
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}
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keystoreFile := &v2keymanager.Keystore{}
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if err := json.Unmarshal(withdrawalKeystore, keystoreFile); err != nil {
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return nil, errors.Wrapf(err, "could not decode keystore json for account: %s", withdrawalKeyPath)
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}
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pubKeyBytes, err := hex.DecodeString(keystoreFile.Pubkey)
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if err != nil {
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return nil, errors.Wrapf(err, "could not decode pubkey bytes: %#x", keystoreFile.Pubkey)
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}
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publicKeys = append(publicKeys, bytesutil.ToBytes48(pubKeyBytes))
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}
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return publicKeys, nil
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}
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|
|
func (dr *Keymanager) initializeSecretKeysCache() error {
|
|
dr.lock.Lock()
|
|
defer dr.lock.Unlock()
|
|
for i := uint64(0); i < dr.seedCfg.NextAccount; i++ {
|
|
validatingKeyPath := fmt.Sprintf(ValidatingKeyDerivationPathTemplate, i)
|
|
derivedKey, err := util.PrivateKeyFromSeedAndPath(dr.seed, validatingKeyPath)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "failed to derive validating key for account %s", validatingKeyPath)
|
|
}
|
|
validatorSigningKey, err := bls.SecretKeyFromBytes(derivedKey.Marshal())
|
|
if err != nil {
|
|
return errors.Wrapf(
|
|
err,
|
|
"could not instantiate bls secret key from bytes for account: %s",
|
|
validatingKeyPath,
|
|
)
|
|
}
|
|
|
|
// Update a simple cache of public key -> secret key utilized
|
|
// for fast signing access in the keymanager.
|
|
dr.keysCache[bytesutil.ToBytes48(validatorSigningKey.PublicKey().Marshal())] = validatorSigningKey
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (dr *Keymanager) generateKeystoreFile(privateKey []byte, publicKey []byte, password string) ([]byte, error) {
|
|
encryptor := keystorev4.New()
|
|
cryptoFields, err := encryptor.Encrypt(privateKey, []byte(password))
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "could not encrypt validating key into keystore")
|
|
}
|
|
id, err := uuid.NewRandom()
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "could not generate new, random UUID for keystore")
|
|
}
|
|
keystoreFile := &v2keymanager.Keystore{
|
|
Crypto: cryptoFields,
|
|
ID: id.String(),
|
|
Pubkey: fmt.Sprintf("%x", publicKey),
|
|
Version: encryptor.Version(),
|
|
Name: encryptor.Name(),
|
|
}
|
|
return json.MarshalIndent(keystoreFile, "", "\t")
|
|
}
|