sha256.BlockSize
// The blocksize of SHA256 and SHA224 in bytes.
const BlockSize = 64
sha256.Size
// The size of a SHA256 checksum in bytes.
const Size = 32
sha256.Size224
// The size of a SHA224 checksum in bytes.
const Size224 = 28
sha256.New
// New returns a new hash.Hash computing the SHA256 checksum. The Hash
// also implements encoding.BinaryMarshaler and
// encoding.BinaryUnmarshaler to marshal and unmarshal the internal
// state of the hash.
func New() hash.Hash
sha256.New224
// New224 returns a new hash.Hash computing the SHA224 checksum.
func New224() hash.Hash
sha256.Sum224
// Sum224 returns the SHA224 checksum of the data.
func Sum224(data []byte) [Size224]byte
sha256.Sum256
// Sum256 returns the SHA256 checksum of the data.
func Sum256(data []byte) [Size]byte