func NewHMAC(h func() hash.Hash, key []byte) hash.Hash { panic("boringcrypto: not available") }

func NewAESCipher(key []byte) (cipher.Block, error) { panic("boringcrypto: not available") }
func NewGCMTLS(cipher.Block) (cipher.AEAD, error)   { panic("boringcrypto: not available") }

type PublicKeyECDSA struct{ _ int }
type PrivateKeyECDSA struct{ _ int }

func GenerateKeyECDSA(curve string) (X, Y, D BigInt, err error) {

		return cipher.NewGCMWithNonceSize(&noGCM{c}, nonceSize)
	}
	if tagSize != gcmTagSize {
		return cipher.NewGCMWithTagSize(&noGCM{c}, tagSize)
	}
	return c.newGCM(false)
}

func NewGCMTLS(c cipher.Block) (cipher.AEAD, error) {
	return c.(*aesCipher).newGCM(true)
}

func (c *aesCipher) newGCM(tls bool) (cipher.AEAD, error) {
	var aead *C.GO_EVP_AEAD
	switch len(c.key) * 8 {
	case 128:

		panic("tls: internal error: wrong nonce length")
	}
	aes, err := aes.NewCipher(key)
	if err != nil {
		panic(err)
	}
	var aead cipher.AEAD
	if boring.Enabled {
		aead, err = boring.NewGCMTLS(aes)
	} else {
		boring.Unreachable()
		aead, err = cipher.NewGCM(aes)
	}
	if err != nil {
		panic(err)
	}

	ret := &prefixNonceAEAD{aead: aead}
	copy(ret.nonce[:], noncePrefix)
	return ret