def generator = new PGPKeyRingGenerator(
            PGPPublicKey.RSA_SIGN,
            keyPair,
            userId,
            new BcPGPDigestCalculatorProvider().get(HashAlgorithmTags.SHA1),
            signatureSubpacketGenerator.generate(),
            null,
            new BcPGPContentSignerBuilder(PGPPublicKey.RSA_SIGN, HashAlgorithmTags.SHA512),

		out = make([]byte, C._goboringcrypto_RSA_size(key))
		return C._goboringcrypto_RSA_sign(nid, base(hashed), C.uint(len(hashed)),
			base(out), &outLen, key)
	}) == 0 {
		return nil, fail("RSA_sign")
	}
	return out[:outLen], nil
}

func VerifyRSAPKCS1v15(pub *PublicKeyRSA, h crypto.Hash, hashed, sig []byte) error {
	if h == 0 {
		var out []byte
		var outLen C.size_t