sandboxed-api/sandboxed_api/proto_helper.h
Christian Blichmann f6c3db4c6e Replace sapi::Status with absl::Status
PiperOrigin-RevId: 297614681
Change-Id: I89fe1357a172ed4d28df6dd84b80fee364ce1c14
2020-02-27 09:24:12 -08:00

68 lines
2.3 KiB
C++

// 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
//
// http://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.
// Utility functions for protobuf handling.
#ifndef SANDBOXED_API_PROTO_HELPER_H_
#define SANDBOXED_API_PROTO_HELPER_H_
#include <cinttypes>
#include <type_traits>
#include <vector>
#include "absl/status/status.h"
#include "sandboxed_api/proto_arg.pb.h"
#include "sandboxed_api/util/statusor.h"
namespace sapi {
template <typename T>
sapi::StatusOr<std::vector<uint8_t>> SerializeProto(const T& proto) {
static_assert(std::is_base_of<google::protobuf::Message, T>::value,
"Template argument must be a proto message");
// Wrap protobuf in a envelope so that we know the name of the protobuf
// structure when deserializing in the sandboxee.
ProtoArg proto_arg;
proto_arg.set_protobuf_data(proto.SerializeAsString());
proto_arg.set_full_name(proto.GetDescriptor()->full_name());
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;
}
template <typename T>
sapi::StatusOr<T> DeserializeProto(const char* data, size_t len) {
static_assert(std::is_base_of<google::protobuf::Message, T>::value,
"Template argument must be a proto message");
ProtoArg envelope;
if (!envelope.ParseFromArray(data, len)) {
return absl::InternalError("Unable to parse proto from array");
}
auto pb_data = envelope.protobuf_data();
T result;
if (!result.ParseFromArray(pb_data.data(), pb_data.size())) {
return absl::InternalError("Unable to parse proto from envelope data");
}
return result;
}
} // namespace sapi
#endif // SANDBOXED_API_PROTO_HELPER_H_