fastsha256

Documentation

Overview

Package fastsha256 implements the SHA224 and SHA256 hash algorithms as defined in FIPS 180-4.

Index

• Constants
• func MidState256(data []byte) [Size]byte
• func New() hash.Hash
• func New224() hash.Hash
• func Sum224(data []byte) (sum224 [Size224]byte)
• func Sum256(data []byte) [Size]byte

Constants

const BlockSize = 64

The blocksize of SHA256 and SHA224 in bytes.

const Size = 32

The size of a SHA256 checksum in bytes.

const Size224 = 28

The size of a SHA224 checksum in bytes.

Functions

func MidState256

func MidState256(data []byte) [Size]byte

MidState256 returns the internal hashing state after hashing the first chunk (BlockSize) of the data. This implemenation does not provide any mechanism to initialize the internal hashing state, so this information can't be used to skip hashing the first chunk on subsequent calls, but it is exposed so sophisticated callers can make use of it.

func New

func New() hash.Hash

New returns a new hash.Hash computing the SHA256 checksum.

func New224

func New224() hash.Hash

New224 returns a new hash.Hash computing the SHA224 checksum.

func Sum224

func Sum224(data []byte) (sum224 [Size224]byte)

Sum224 returns the SHA224 checksum of the data.

func Sum256

func Sum256(data []byte) [Size]byte

Sum256 returns the SHA256 checksum of the data.