crypto

Documentation

Index

• func CreateAddress(b common.Address, nonce uint64) common.Address
• func Decrypt(prv *ecdsa.PrivateKey, ct []byte) ([]byte, error)
• func Ecrecover(hash, sig []byte) ([]byte, error)
• func Encrypt(pub *ecdsa.PublicKey, message []byte) ([]byte, error)
• func FromECDSA(prv *ecdsa.PrivateKey) []byte
• func FromECDSAPub(pub *ecdsa.PublicKey) []byte
• func GenerateKey() (*ecdsa.PrivateKey, error)
• func HexToECDSA(hexkey string) (*ecdsa.PrivateKey, error)
• func Keccak256(data ...[]byte) []byte
• func Keccak256Hash(data ...[]byte) (h common.Hash)
• func LoadECDSA(file string) (*ecdsa.PrivateKey, error)
• func PubkeyToAddress(p ecdsa.PublicKey) common.Address
• func Ripemd160(data []byte) []byte
• func SaveECDSA(file string, key *ecdsa.PrivateKey) error
• func Sha256(data []byte) []byte
• func Sha3(data ...[]byte) []byte
• func Sha3Hash(data ...[]byte) common.Hash
• func SigToPub(hash, sig []byte) (*ecdsa.PublicKey, error)
• func Sign(data []byte, prv *ecdsa.PrivateKey) (sig []byte, err error)
• func SignEthereum(data []byte, prv *ecdsa.PrivateKey) ([]byte, error)
• func ToECDSA(prv []byte) *ecdsa.PrivateKey
• func ToECDSAPub(pub []byte) *ecdsa.PublicKey
• func ValidateSignatureValues(v byte, r, s *big.Int, homestead bool) bool

Functions

func CreateAddress

func CreateAddress(b common.Address, nonce uint64) common.Address

Creates an ethereum address given the bytes and the nonce

func Decrypt

func Decrypt(prv *ecdsa.PrivateKey, ct []byte) ([]byte, error)

func Ecrecover

func Ecrecover(hash, sig []byte) ([]byte, error)

Ecrecover returns the public key for the private key that was used to calculate the signature.

Note: secp256k1 expects the recover id to be either 0, 1. Ethereum signatures have a recover id with an offset of 27. Callers must take this into account and if "recovering" from an Ethereum signature adjust.

func Encrypt

func Encrypt(pub *ecdsa.PublicKey, message []byte) ([]byte, error)

func FromECDSA

func FromECDSA(prv *ecdsa.PrivateKey) []byte

func FromECDSAPub

func FromECDSAPub(pub *ecdsa.PublicKey) []byte

func GenerateKey

func GenerateKey() (*ecdsa.PrivateKey, error)

func HexToECDSA

func HexToECDSA(hexkey string) (*ecdsa.PrivateKey, error)

HexToECDSA parses a secp256k1 private key.

func Keccak256

func Keccak256(data ...[]byte) []byte

func Keccak256Hash

func Keccak256Hash(data ...[]byte) (h common.Hash)

func LoadECDSA

func LoadECDSA(file string) (*ecdsa.PrivateKey, error)

LoadECDSA loads a secp256k1 private key from the given file. The key data is expected to be hex-encoded.

func PubkeyToAddress

func PubkeyToAddress(p ecdsa.PublicKey) common.Address

func Ripemd160

func Ripemd160(data []byte) []byte

func SaveECDSA

func SaveECDSA(file string, key *ecdsa.PrivateKey) error

SaveECDSA saves a secp256k1 private key to the given file with restrictive permissions. The key data is saved hex-encoded.

func Sha256

func Sha256(data []byte) []byte

func Sha3

func Sha3(data ...[]byte) []byte

Deprecated: For backward compatibility as other packages depend on these

func Sha3Hash

func Sha3Hash(data ...[]byte) common.Hash

func SigToPub

func SigToPub(hash, sig []byte) (*ecdsa.PublicKey, error)

func Sign

func Sign(data []byte, prv *ecdsa.PrivateKey) (sig []byte, err error)

Sign calculates an ECDSA signature. This function is susceptible to choosen plaintext attacks that can leak information about the private key that is used for signing. Callers must be aware that the given hash cannot be choosen by an adversery. Common solution is to hash any input before calculating the signature.

Note: the calculated signature is not Ethereum compliant. The yellow paper dictates Ethereum singature to have a V value with and offset of 27 v in [27,28]. Use SignEthereum to get an Ethereum compliant signature.

func SignEthereum

func SignEthereum(data []byte, prv *ecdsa.PrivateKey) ([]byte, error)

SignEthereum calculates an Ethereum ECDSA signature. This function is susceptible to choosen plaintext attacks that can leak information about the private key that is used for signing. Callers must be aware that the given hash cannot be freely choosen by an adversery. Common solution is to hash the message before calculating the signature.

func ToECDSA

func ToECDSA(prv []byte) *ecdsa.PrivateKey

New methods using proper ecdsa keys from the stdlib

func ToECDSAPub

func ToECDSAPub(pub []byte) *ecdsa.PublicKey

func ValidateSignatureValues

func ValidateSignatureValues(v byte, r, s *big.Int, homestead bool) bool