1 /* 2 * Copyright 2019 Google LLC. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * https://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef PRIVATE_JOIN_AND_COMPUTE_UTIL_ELGAMAL_KEY_UTIL_H_ 17 #define PRIVATE_JOIN_AND_COMPUTE_UTIL_ELGAMAL_KEY_UTIL_H_ 18 19 #include <memory> 20 #include <string> 21 #include <vector> 22 23 #include "private_join_and_compute/crypto/elgamal.pb.h" 24 #include "private_join_and_compute/util/status.inc" 25 26 namespace private_join_and_compute::elgamal_key_util { 27 28 // Generates a pair of public, private ElGamal keys and writes them to the 29 // provided files as ::private_join_and_compute::ElGamalPublicKey and 30 // ::private_join_and_compute::ElGamalPrivateKey proto messages. 31 Status GenerateElGamalKeyPair(int curve_id, absl::string_view pub_key_filename, 32 absl::string_view prv_key_filename); 33 34 // Joins the shares of ElGamal public keys into a joint key. 35 // The shares and joint keys are encoded as 36 // ::private_join_and_compute::ElGamalPublicKey proto messages. 37 Status ComputeJointElGamalPublicKey( 38 int curve_id, const std::vector<std::string>& shares_filenames, 39 absl::string_view join_pub_key_key_filename); 40 41 } // namespace private_join_and_compute::elgamal_key_util 42 43 #endif // PRIVATE_JOIN_AND_COMPUTE_UTIL_ELGAMAL_KEY_UTIL_H_ 44