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/*
* Copyright 2019 Google Inc.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef UTIL_ELGAMAL_KEY_UTIL_H_
#define UTIL_ELGAMAL_KEY_UTIL_H_
#include <memory>
#include <string>
#include "private_join_and_compute/crypto/elgamal.pb.h"
#include "private_join_and_compute/util/status.inc"
namespace private_join_and_compute::elgamal_key_util {
// Generates a pair of public, private ElGamal keys and writes them to the
// provided files as ::private_join_and_compute::ElGamalPublicKey and
// ::private_join_and_compute::ElGamalPrivateKey proto messages.
Status GenerateElGamalKeyPair(int curve_id, absl::string_view pub_key_filename,
absl::string_view prv_key_filename);
// Joins the shares of ElGamal public keys into a joint key.
// The shares and joint keys are encoded as
// ::private_join_and_compute::ElGamalPublicKey proto messages.
Status ComputeJointElGamalPublicKey(
int curve_id, const std::vector<std::string>& shares_filenames,
absl::string_view join_pub_key_key_filename);
} // namespace private_join_and_compute::elgamal_key_util
#endif // UTIL_ELGAMAL_KEY_UTIL_H_
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