int _goboringcrypto_EVP_AEAD_CTX_init(GO_EVP_AEAD_CTX*, const GO_EVP_AEAD*, const uint8_t*, size_t, size_t, GO_ENGINE*);
void _goboringcrypto_EVP_AEAD_CTX_cleanup(GO_EVP_AEAD_CTX*);
int _goboringcrypto_EVP_AEAD_CTX_seal(const GO_EVP_AEAD_CTX*, uint8_t*, size_t*, size_t, const uint8_t*, size_t, const uint8_t*, size_t, const uint8_t*, size_t);

							  size_t exp_out_len,
							  const uint8_t *nonce, size_t nonce_len,
							  const uint8_t *in, size_t in_len,
							  const uint8_t *ad, size_t ad_len) {
	size_t out_len;
	int ok = _goboringcrypto_EVP_AEAD_CTX_seal(ctx, out, &out_len, exp_out_len,
		nonce, nonce_len, in, in_len, ad, ad_len);
	if (out_len != exp_out_len) {
		return 0;
	}
	return ok;
};