return nil, fail("ECDSA_sign")
	}
	runtime.KeepAlive(priv)
	return sig[:sigLen], nil
}

func VerifyECDSA(pub *PublicKeyECDSA, hash []byte, sig []byte) bool {
	ok := C._goboringcrypto_ECDSA_verify(0, base(hash), C.size_t(len(hash)), base(sig), C.size_t(len(sig)), pub.key) != 0
	runtime.KeepAlive(pub)
	return ok
}

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

int _goboringcrypto_ECDSA_sign(int, const uint8_t*, size_t, uint8_t*, unsigned int*, const GO_EC_KEY*);
size_t _goboringcrypto_ECDSA_size(const GO_EC_KEY*);
int _goboringcrypto_ECDSA_verify(int, const uint8_t*, size_t, const uint8_t*, size_t, const GO_EC_KEY*);

// #include <openssl/rsa.h>

// Note: order of struct fields here is unchecked.