sandboxed-api/sandboxed_api/proto_helper.cc

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// Copyright 2022 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 "sandboxed_api/proto_helper.h"
#include <cstddef>
#include <cstdint>
#include <string>
#include <utility>
#include <vector>
#include "absl/status/status.h"
#include "absl/status/statusor.h"
namespace sapi {
namespace internal {
absl::Status DeserializeProto(const char* data, size_t len,
google::protobuf::MessageLite& output) {
ProtoArg envelope;
if (!envelope.ParseFromArray(data, len)) {
return absl::InternalError("Unable to parse proto from array");
}
auto pb_data = envelope.protobuf_data();
if (!output.ParseFromArray(pb_data.data(), pb_data.size())) {
return absl::InternalError("Unable to parse proto from envelope data");
}
return absl::OkStatus();
}
} // namespace internal
absl::StatusOr<std::vector<uint8_t>> SerializeProto(
const google::protobuf::MessageLite& proto) {
// Wrap protobuf in a envelope so that we know the name of the protobuf
// structure when deserializing in the sandboxee.
ProtoArg proto_arg;
std::string proto_data;
if (!proto.SerializeToString(&proto_data)) {
return absl::InternalError("Unable to serialize proto data");
}
proto_arg.set_protobuf_data(std::move(proto_data));
proto_arg.set_full_name(proto.GetTypeName());
std::vector<uint8_t> serialized_proto(proto_arg.ByteSizeLong());
if (!proto_arg.SerializeToArray(serialized_proto.data(),
serialized_proto.size())) {
return absl::InternalError("Unable to serialize proto to array");
}
return serialized_proto;
}
} // namespace sapi