int _goboringcrypto_RSA_sign_pss_mgf1(GO_RSA*, size_t *out_len, uint8_t *out, size_t max_out, const uint8_t *in, size_t in_len, const GO_EVP_MD *md, const GO_EVP_MD *mgf1_md, int salt_len);
int _goboringcrypto_RSA_sign_raw(GO_RSA*, size_t *out_len, uint8_t *out, size_t max_out, const uint8_t *in, size_t in_len, int padding);

	if h == 0 {
		// No hashing.
		var out []byte
		var outLen C.size_t
		if priv.withKey(func(key *C.GO_RSA) C.int {
			out = make([]byte, C._goboringcrypto_RSA_size(key))
			return C._goboringcrypto_RSA_sign_raw(key, &outLen, base(out), C.size_t(len(out)),
				base(hashed), C.size_t(len(hashed)), C.GO_RSA_PKCS1_PADDING)
		}) == 0 {
			return nil, fail("RSA_sign_raw")
		}
		return out[:outLen], nil
	}