// also implements [encoding.BinaryMarshaler] and
// [encoding.BinaryUnmarshaler] to marshal and unmarshal the internal
// state of the hash.
func New() hash.Hash {
	if boring.Enabled {
		return boring.NewSHA256()
	}
	d := new(digest)
	d.Reset()
	return d
}

// New224 returns a new hash.Hash computing the SHA224 checksum.
func New224() hash.Hash {
	if boring.Enabled {
		return boring.NewSHA224()
	}