rfc6979

Documentation

Index

• func HmacSHA256(m []byte, k []byte) []byte
• func SignECDSA(priv *ecdsa.PrivateKey, hash []byte, alg func() hash.Hash, nonce int) (r, s *big.Int, err error)

Functions

func HmacSHA256

func HmacSHA256(m []byte, k []byte) []byte

HmacSHA256 returns a Hash-based message authentication code

func SignECDSA

func SignECDSA(priv *ecdsa.PrivateKey, hash []byte, alg func() hash.Hash, nonce int) (r, s *big.Int, err error)

SignECDSA signs an arbitrary length hash (which should be the result of hashing a larger message) using the private key, priv. It returns the signature as a pair of integers.

Note that FIPS 186-3 section 4.6 specifies that the hash should be truncated to the byte-length of the subgroup. This function does not perform that truncation itself.