func NewSHA224() hash.Hash { panic("boringcrypto: not available") }
func NewSHA256() hash.Hash { panic("boringcrypto: not available") }
func NewSHA384() hash.Hash { panic("boringcrypto: not available") }
func NewSHA512() hash.Hash { panic("boringcrypto: not available") }

func SHA1([]byte) [20]byte   { panic("boringcrypto: not available") }
func SHA224([]byte) [28]byte { panic("boringcrypto: not available") }

func consumeUint64(b []byte) ([]byte, uint64) {
	return b[8:], byteorder.BeUint64(b)
}

// New returns a new hash.Hash computing the SHA-512 checksum.
func New() hash.Hash {
	if boring.Enabled {
		return boring.NewSHA512()
	}
	d := &digest{function: crypto.SHA512}
	d.Reset()
	return d
}

// New512_224 returns a new hash.Hash computing the SHA-512/224 checksum.
func New512_224() hash.Hash {