type PublicKeyECDSA struct {
	key *C.GO_EC_KEY
}

func (k *PublicKeyECDSA) finalize() {
	C._goboringcrypto_EC_KEY_free(k.key)
}

var errUnknownCurve = errors.New("boringcrypto: unknown elliptic curve")

func curveNID(curve string) (C.int, error) {
	switch curve {
	case "P-224":
		return C.GO_NID_secp224r1, nil
	case "P-256":
		return C.GO_NID_X9_62_prime256v1, nil
	case "P-384":
		return C.GO_NID_secp384r1, nil
	case "P-521":

	C._goboringcrypto_EC_KEY_free(k.key)
}

func NewPublicKeyECDH(curve string, bytes []byte) (*PublicKeyECDH, error) {
	if len(bytes) < 1 {
		return nil, errors.New("NewPublicKeyECDH: missing key")
	}

	nid, err := curveNID(curve)
	if err != nil {
		return nil, err
	}

	group := C._goboringcrypto_EC_GROUP_new_by_curve_name(nid)
	if group == nil {
		return nil, fail("EC_GROUP_new_by_curve_name")
	}