crypto

package
Version: v1.10.25 Latest Latest
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Published: Sep 15, 2022 License: GPL-3.0 Imports: 16 Imported by: 8,094

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Index

Constants

View Source
const DigestLength = 32

DigestLength sets the signature digest exact length

View Source
const RecoveryIDOffset = 64

RecoveryIDOffset points to the byte offset within the signature that contains the recovery id.

View Source
const SignatureLength = 64 + 1 // 64 bytes ECDSA signature + 1 byte recovery id

SignatureLength indicates the byte length required to carry a signature with recovery id.

Variables

This section is empty.

Functions

func CompressPubkey added in v1.8.0

func CompressPubkey(pubkey *ecdsa.PublicKey) []byte

CompressPubkey encodes a public key to the 33-byte compressed format.

func CreateAddress

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

CreateAddress creates an ethereum address given the bytes and the nonce

func CreateAddress2 added in v1.8.13

func CreateAddress2(b common.Address, salt [32]byte, inithash []byte) common.Address

CreateAddress2 creates an ethereum address given the address bytes, initial contract code hash and a salt.

func DecompressPubkey added in v1.8.0

func DecompressPubkey(pubkey []byte) (*ecdsa.PublicKey, error)

DecompressPubkey parses a public key in the 33-byte compressed format.

func Ecrecover

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

Ecrecover returns the uncompressed public key that created the given signature.

func FromECDSA

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

FromECDSA exports a private key into a binary dump.

func FromECDSAPub

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

func GenerateKey

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

GenerateKey generates a new private key.

func HashData added in v1.10.0

func HashData(kh KeccakState, data []byte) (h common.Hash)

HashData hashes the provided data using the KeccakState and returns a 32 byte hash

func HexToECDSA added in v0.8.4

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

HexToECDSA parses a secp256k1 private key.

func Keccak256 added in v1.4.0

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

Keccak256 calculates and returns the Keccak256 hash of the input data.

func Keccak256Hash added in v1.4.0

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

Keccak256Hash calculates and returns the Keccak256 hash of the input data, converting it to an internal Hash data structure.

func Keccak512 added in v1.6.0

func Keccak512(data ...[]byte) []byte

Keccak512 calculates and returns the Keccak512 hash of the input data.

func LoadECDSA added in v0.8.4

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

LoadECDSA loads a secp256k1 private key from the given file.

func PubkeyToAddress added in v0.8.4

func PubkeyToAddress(p ecdsa.PublicKey) common.Address

func S256

func S256() elliptic.Curve

S256 returns an instance of the secp256k1 curve.

func SaveECDSA added in v0.9.17

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 SigToPub

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

SigToPub returns the public key that created the given signature.

func Sign

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

Sign calculates an ECDSA signature.

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

The produced signature is in the [R || S || V] format where V is 0 or 1.

func ToECDSA

func ToECDSA(d []byte) (*ecdsa.PrivateKey, error)

ToECDSA creates a private key with the given D value.

func ToECDSAUnsafe added in v1.6.3

func ToECDSAUnsafe(d []byte) *ecdsa.PrivateKey

ToECDSAUnsafe blindly converts a binary blob to a private key. It should almost never be used unless you are sure the input is valid and want to avoid hitting errors due to bad origin encoding (0 prefixes cut off).

func UnmarshalPubkey added in v1.8.11

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

UnmarshalPubkey converts bytes to a secp256k1 public key.

func ValidateSignatureValues added in v0.9.28

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

ValidateSignatureValues verifies whether the signature values are valid with the given chain rules. The v value is assumed to be either 0 or 1.

func VerifySignature added in v1.8.0

func VerifySignature(pubkey, digestHash, signature []byte) bool

VerifySignature checks that the given public key created signature over digest. The public key should be in compressed (33 bytes) or uncompressed (65 bytes) format. The signature should have the 64 byte [R || S] format.

Types

type KeccakState added in v1.9.16

type KeccakState interface {
	hash.Hash
	Read([]byte) (int, error)
}

KeccakState wraps sha3.state. In addition to the usual hash methods, it also supports Read to get a variable amount of data from the hash state. Read is faster than Sum because it doesn't copy the internal state, but also modifies the internal state.

func NewKeccakState added in v1.10.0

func NewKeccakState() KeccakState

NewKeccakState creates a new KeccakState

Directories

Path Synopsis
Package blake2b implements the BLAKE2b hash algorithm defined by RFC 7693 and the extendable output function (XOF) BLAKE2Xb.
Package blake2b implements the BLAKE2b hash algorithm defined by RFC 7693 and the extendable output function (XOF) BLAKE2Xb.
Package bn256 implements the Optimal Ate pairing over a 256-bit Barreto-Naehrig curve.
Package bn256 implements the Optimal Ate pairing over a 256-bit Barreto-Naehrig curve.
cloudflare
Package bn256 implements a particular bilinear group at the 128-bit security level.
Package bn256 implements a particular bilinear group at the 128-bit security level.
google
Package bn256 implements a particular bilinear group.
Package bn256 implements a particular bilinear group.
Package secp256k1 wraps the bitcoin secp256k1 C library.
Package secp256k1 wraps the bitcoin secp256k1 C library.

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