crypto

Documentation

Index

• func CompressPubkey(pubkey *ecdsa.PublicKey) []byte
• func DecompressPubkey(pubkey []byte) (*ecdsa.PublicKey, error)
• func FromECDSAPub(pub *ecdsa.PublicKey) []byte
• func HexToECDSA(hexkey string) (*ecdsa.PrivateKey, error)
• func PubkeyToAddress(p ecdsa.PublicKey) hash.Address
• func SigToPub(hash hash.Hash, signature []byte) (*ecdsa.PublicKey, error)
• func Sign(hash hash.Hash, prv *ecdsa.PrivateKey) (sig []byte, err error)
• func VerifySignature(pubkey *ecdsa.PublicKey, hash hash.Hash, signature []byte) bool

Functions

func CompressPubkey

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

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

func DecompressPubkey

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

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

func FromECDSAPub

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

func HexToECDSA

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

HexToECDSA parses a secp256k1 private key.

func PubkeyToAddress

func PubkeyToAddress(p ecdsa.PublicKey) hash.Address

func SigToPub

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

SigToPub returns the public key that created the given signature.

func Sign

func Sign(hash hash.Hash, 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 hash 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 VerifySignature

func VerifySignature(pubkey *ecdsa.PublicKey, hash hash.Hash, signature []byte) bool

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