keystore

package
v1.6.0-rc.1 Latest Latest
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 Go to latest Published: Jan 25, 2021 License: GPL-3.0 Imports: 35 Imported by: 44

Documentation

Overview

Package keystore implements encrypted storage of secp256k1 private keys.

Keys are stored as encrypted JSON files according to the Web3 Secret Storage specification. See https://github.com/ethereum/wiki/wiki/Web3-Secret-Storage-Definition for more information.

Source Files

Each file contains following contents

  • account_cache.go : Provides `accountCache` which contains a live index of all accounts in keystore folder
  • file_cache.go : Provides `fileCache` which contains information of all files in keystore folder
  • key.go : Defines `KeyV3` struct, `keyStore` interface and related functions
  • keyv4.go : Defines `KeyV4` struct.
  • keystore.go : Defines `KeyStore` which manages a key storage directory on disk and related functions
  • keystore_passphrase.go: Provides functions to encrypt and decrypt `Key` with a passphrase
  • keystore_plain.go : Deprecated
  • keystore_wallet.go : Defines `keystoreWallet` struct which implements accounts.Wallet interface. Wallet represents a software or hardware wallet that might contain one or more accounts
  • presale.go : Deprecated
  • watch.go : Provides a watcher which monitors any changes on the keystore folder
  • watch_fallback.go : Provides an empty watcher for unsupported platforms

Index

Constants

View Source 
const (

	// StandardScryptN is the N parameter of Scrypt encryption algorithm, using 256MB
	// memory and taking approximately 1s CPU time on a modern processor.
	StandardScryptN = 1 << 18

	// StandardScryptP is the P parameter of Scrypt encryption algorithm, using 256MB
	// memory and taking approximately 1s CPU time on a modern processor.
	StandardScryptP = 1

	// LightScryptN is the N parameter of Scrypt encryption algorithm, using 4MB
	// memory and taking approximately 100ms CPU time on a modern processor.
	LightScryptN = 1 << 12

	// LightScryptP is the P parameter of Scrypt encryption algorithm, using 4MB
	// memory and taking approximately 100ms CPU time on a modern processor.
	LightScryptP = 6
)

Variables

View Source 
var (
	ErrLocked     = accounts.NewAuthNeededError("password or unlock")
	ErrNoMatch    = errors.New("no key for given address or file")
	ErrDecrypt    = errors.New("could not decrypt key with given passphrase")
	ErrChainIdNil = errors.New("Chain ID should not be nil")
)
View Source 
var KeyStoreScheme = "keystore"

KeyStoreScheme is the protocol scheme prefixing account and wallet URLs.

View Source 
var KeyStoreType = reflect.TypeOf(&KeyStore{})

KeyStoreType is the reflect type of a keystore backend.

Functions

func EncryptKey 

func EncryptKey(key Key, auth string, scryptN, scryptP int) ([]byte, error)

EncryptKey encrypts a key using the specified scrypt parameters into a json blob that can be decrypted later on. It uses the keystore v4 format.

func EncryptKeyV3 added in v1.4.0 

func EncryptKeyV3(key Key, auth string, scryptN, scryptP int) ([]byte, error)

EncryptKeyV3 encrypts a key using the specified scrypt parameters into a json blob that can be decrypted later on. It uses the keystore v3 format.

func StoreKey 

func StoreKey(dir, auth string, scryptN, scryptP int) (common.Address, error)

StoreKey generates a key, encrypts with 'auth' and stores in the given directory

Types

type AmbiguousAddrError 

type AmbiguousAddrError struct {
	Addr    common.Address
	Matches []accounts.Account
}

AmbiguousAddrError is returned when attempting to unlock an address for which more than one file exists.

func (*AmbiguousAddrError) Error 

func (err *AmbiguousAddrError) Error() string

type Key 

type Key interface {
	json.Marshaler
	json.Unmarshaler

	// Returns key ID.
	GetId() uuid.UUID

	// Returns the address of the keystore.
	GetAddress() common.Address

	// Returns the default key of the keystore.
	GetPrivateKey() *ecdsa.PrivateKey

	// Returns all keys in the keystore.
	GetPrivateKeys() [][]*ecdsa.PrivateKey

	// Returns all keys in the specified role in the keystore.
	GetPrivateKeysWithRole(role int) []*ecdsa.PrivateKey

	// Resets all the keys in the keystore.
	ResetPrivateKey()
}

Key represents a keystore storing private keys of an account.

func DecryptKey 

func DecryptKey(keyjson []byte, auth string) (Key, error)

DecryptKey decrypts a key from a json blob, returning the private key itself. TODO: use encryptedKeyJSON object directly instead of double unmarshalling.

func NewKeyForDirectICAP 

func NewKeyForDirectICAP(rand io.Reader) Key

NewKeyForDirectICAP generates a key whose address fits into < 155 bits so it can fit into the Direct ICAP spec. for simplicity and easier compatibility with other libs, we retry until the first byte is 0.

type KeyStore 

type KeyStore struct {
	// contains filtered or unexported fields
}

KeyStore manages a key storage directory on disk.

func NewKeyStore 

func NewKeyStore(keydir string, scryptN, scryptP int) *KeyStore

NewKeyStore creates a keystore for the given directory.

func NewPlaintextKeyStore 

func NewPlaintextKeyStore(keydir string) *KeyStore

NewPlaintextKeyStore creates a keystore for the given directory. Deprecated: Use NewKeyStore.

func (*KeyStore) Accounts 

func (ks *KeyStore) Accounts() []accounts.Account

Accounts returns all key files present in the directory.

func (*KeyStore) Delete 

func (ks *KeyStore) Delete(a accounts.Account, passphrase string) error

Delete deletes the key matched by account if the passphrase is correct. If the account contains no filename, the address must match a unique key.

func (*KeyStore) Export 

func (ks *KeyStore) Export(a accounts.Account, passphrase, newPassphrase string) (keyJSON []byte, err error)

Export exports as a JSON key, encrypted with newPassphrase.

func (*KeyStore) Find 

func (ks *KeyStore) Find(a accounts.Account) (accounts.Account, error)

Find resolves the given account into a unique entry in the keystore.

func (*KeyStore) HasAddress 

func (ks *KeyStore) HasAddress(addr common.Address) bool

HasAddress reports whether a key with the given address is present.

func (*KeyStore) Import 

func (ks *KeyStore) Import(keyJSON []byte, passphrase, newPassphrase string) (accounts.Account, error)

Import stores the given encrypted JSON key into the key directory.

func (*KeyStore) ImportECDSA 

func (ks *KeyStore) ImportECDSA(priv *ecdsa.PrivateKey, passphrase string) (accounts.Account, error)

ImportECDSA stores the given key into the key directory, encrypting it with the passphrase.

func (*KeyStore) ImportECDSAWithAddress 

func (ks *KeyStore) ImportECDSAWithAddress(priv *ecdsa.PrivateKey, passphrase string, address *common.Address) (accounts.Account, error)

ImportECDSAWithAddress stores the given key and address into the key directory, encrypting it with the passphrase.

func (*KeyStore) IsUnlocked added in v1.1.0 

func (ks *KeyStore) IsUnlocked(addr common.Address) bool

IsUnlocked returns if the account is unlocked or not.

func (*KeyStore) Lock 

func (ks *KeyStore) Lock(addr common.Address) error

Lock removes the private key with the given address from memory.

func (*KeyStore) NewAccount 

func (ks *KeyStore) NewAccount(passphrase string) (accounts.Account, error)

NewAccount generates a new key and stores it into the key directory, encrypting it with the passphrase.

func (*KeyStore) ReplaceECDSAWithAddress 

func (ks *KeyStore) ReplaceECDSAWithAddress(priv *ecdsa.PrivateKey, passphrase string, newPassphrase string, address *common.Address) (accounts.Account, error)

ReplaceECDSAWithAddress stores the given key and address into the key directory, encrypting it with the newPassphrase. This first checks that the target address exists and it can be unlocked with passphrase.

func (*KeyStore) SignHash 

func (ks *KeyStore) SignHash(a accounts.Account, hash []byte) ([]byte, error)

SignHash calculates a ECDSA signature for the given hash. The produced signature is in the [R || S || V] format where V is 0 or 1.

func (*KeyStore) SignHashWithPassphrase 

func (ks *KeyStore) SignHashWithPassphrase(a accounts.Account, passphrase string, hash []byte) (signature []byte, err error)

SignHashWithPassphrase signs hash if the private key matching the given address can be decrypted with the given passphrase. The produced signature is in the [R || S || V] format where V is 0 or 1.

func (*KeyStore) SignTx 

func (ks *KeyStore) SignTx(a accounts.Account, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error)

SignTx signs the given transaction with the requested account.

func (*KeyStore) SignTxAsFeePayer added in v1.3.0 

func (ks *KeyStore) SignTxAsFeePayer(a accounts.Account, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error)

SignTxAsFeePayer signs the given transaction as a fee payer with the requested account.

func (*KeyStore) SignTxAsFeePayerWithPassphrase added in v1.3.0 

func (ks *KeyStore) SignTxAsFeePayerWithPassphrase(a accounts.Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error)

SignTxAsFeePayerWithPassphrase signs the transaction as a fee payer if the private key matching the given address can be decrypted with the given passphrase.

func (*KeyStore) SignTxWithPassphrase 

func (ks *KeyStore) SignTxWithPassphrase(a accounts.Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error)

SignTxWithPassphrase signs the transaction if the private key matching the given address can be decrypted with the given passphrase.

func (*KeyStore) Subscribe 

func (ks *KeyStore) Subscribe(sink chan<- accounts.WalletEvent) event.Subscription

Subscribe implements accounts.Backend, creating an async subscription to receive notifications on the addition or removal of keystore wallets.

func (*KeyStore) TimedUnlock 

func (ks *KeyStore) TimedUnlock(a accounts.Account, passphrase string, timeout time.Duration) error

TimedUnlock unlocks the given account with the passphrase. The account stays unlocked for the duration of timeout. A timeout of 0 unlocks the account until the program exits. The account must match a unique key file.

If the account address is already unlocked for a duration, TimedUnlock extends or shortens the active unlock timeout. If the address was previously unlocked indefinitely the timeout is not altered.

func (*KeyStore) Unlock 

func (ks *KeyStore) Unlock(a accounts.Account, passphrase string) error

Unlock unlocks the given account indefinitely.

func (*KeyStore) Update 

func (ks *KeyStore) Update(a accounts.Account, passphrase, newPassphrase string) error

Update changes the passphrase of an existing account.

func (*KeyStore) UpdateKey 

func (ks *KeyStore) UpdateKey(a accounts.Account, newKey Key, passphrase, newPassphrase string) error

UpdateKey changes the key and passphrase of an existing account.

func (*KeyStore) Wallets 

func (ks *KeyStore) Wallets() []accounts.Wallet

Wallets implements accounts.Backend, returning all single-key wallets from the keystore directory.

type KeyV3 added in v1.4.0 

type KeyV3 struct {
	Id uuid.UUID // Version 4 "random" for unique id not derived from key data
	// to simplify lookups we also store the address
	Address common.Address
	// we only store privkey as pubkey/address can be derived from it
	// privkey in this struct is always in plaintext
	PrivateKey *ecdsa.PrivateKey
}

func (*KeyV3) GetAddress added in v1.4.0 

func (k *KeyV3) GetAddress() common.Address

func (*KeyV3) GetId added in v1.4.0 

func (k *KeyV3) GetId() uuid.UUID

func (*KeyV3) GetPrivateKey added in v1.4.0 

func (k *KeyV3) GetPrivateKey() *ecdsa.PrivateKey

func (*KeyV3) GetPrivateKeys added in v1.4.0 

func (k *KeyV3) GetPrivateKeys() [][]*ecdsa.PrivateKey

func (*KeyV3) GetPrivateKeysWithRole added in v1.4.0 

func (k *KeyV3) GetPrivateKeysWithRole(role int) []*ecdsa.PrivateKey

func (*KeyV3) MarshalJSON added in v1.4.0 

func (k *KeyV3) MarshalJSON() (j []byte, err error)

func (*KeyV3) ResetPrivateKey added in v1.4.0 

func (k *KeyV3) ResetPrivateKey()

func (*KeyV3) UnmarshalJSON added in v1.4.0 

func (k *KeyV3) UnmarshalJSON(j []byte) (err error)

type KeyV4 added in v1.4.0 

type KeyV4 struct {
	Id uuid.UUID // Version 4 "random" for unique id not derived from key data
	// to simplify lookups we also store the address
	Address common.Address
	// We only store privkey as pubkey/address can be derived from it.
	PrivateKeys [][]*ecdsa.PrivateKey
}

func (*KeyV4) GetAddress added in v1.4.0 

func (k *KeyV4) GetAddress() common.Address

func (*KeyV4) GetId added in v1.4.0 

func (k *KeyV4) GetId() uuid.UUID

func (*KeyV4) GetPrivateKey added in v1.4.0 

func (k *KeyV4) GetPrivateKey() *ecdsa.PrivateKey

func (*KeyV4) GetPrivateKeys added in v1.4.0 

func (k *KeyV4) GetPrivateKeys() [][]*ecdsa.PrivateKey

func (*KeyV4) GetPrivateKeysWithRole added in v1.4.0 

func (k *KeyV4) GetPrivateKeysWithRole(role int) []*ecdsa.PrivateKey

func (*KeyV4) MarshalJSON added in v1.4.0 

func (k *KeyV4) MarshalJSON() (j []byte, err error)

func (*KeyV4) ResetPrivateKey added in v1.4.0 

func (k *KeyV4) ResetPrivateKey()

func (*KeyV4) UnmarshalJSON added in v1.4.0 

func (k *KeyV4) UnmarshalJSON(j []byte) (err error)

Source Files

View all Source files

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