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/*
* Copyright 2019 Google LLC.
* 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.
*/
#include "private_join_and_compute/crypto/proto/proto_util.h"
#include <utility>
#include <vector>
#include "private_join_and_compute/crypto/context.h"
#include "private_join_and_compute/crypto/ec_group.h"
#include "private_join_and_compute/crypto/ec_point.h"
#include "private_join_and_compute/crypto/proto/ec_point.pb.h"
#include "private_join_and_compute/util/status.inc"
namespace private_join_and_compute {
proto::BigNumVector BigNumVectorToProto(
absl::Span<const BigNum> big_num_vector) {
proto::BigNumVector big_num_vector_proto;
big_num_vector_proto.mutable_serialized_big_nums()->Reserve(
big_num_vector.size());
for (const auto& bn : big_num_vector) {
big_num_vector_proto.add_serialized_big_nums(bn.ToBytes());
}
return big_num_vector_proto;
}
std::vector<BigNum> ParseBigNumVectorProto(
Context* context, const proto::BigNumVector& big_num_vector_proto) {
std::vector<BigNum> big_num_vector;
for (const auto& serialized_big_num :
big_num_vector_proto.serialized_big_nums()) {
big_num_vector.push_back(context->CreateBigNum(serialized_big_num));
}
return big_num_vector;
}
// Converts a std::vector<BigNum> into a protocol buffer BigNumVector.
StatusOr<proto::ECPointVector> ECPointVectorToProto(
absl::Span<const ECPoint> ec_point_vector) {
proto::ECPointVector ec_point_vector_proto;
ec_point_vector_proto.mutable_serialized_ec_points()->Reserve(
ec_point_vector.size());
for (const auto& ec_point : ec_point_vector) {
ASSIGN_OR_RETURN(std::string serialized_ec_point,
ec_point.ToBytesCompressed());
ec_point_vector_proto.add_serialized_ec_points(serialized_ec_point);
}
return std::move(ec_point_vector_proto);
}
// Converts a protocol buffer BigNumVector into a std::vector<BigNum>.
StatusOr<std::vector<ECPoint>> ParseECPointVectorProto(
Context* context, ECGroup* ec_group,
const proto::ECPointVector& ec_point_vector_proto) {
std::vector<ECPoint> ec_point_vector;
for (const auto& serialized_ec_point :
ec_point_vector_proto.serialized_ec_points()) {
ASSIGN_OR_RETURN(ECPoint ec_point,
ec_group->CreateECPoint(serialized_ec_point));
ec_point_vector.push_back(std::move(ec_point));
}
return std::move(ec_point_vector);
}
} // namespace private_join_and_compute
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