mirror of
https://github.com/google/sandboxed-api.git
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68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
// Copyright 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Utility functions for protobuf handling.
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#ifndef SANDBOXED_API_PROTO_HELPER_H_
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#define SANDBOXED_API_PROTO_HELPER_H_
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#include <cinttypes>
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#include <type_traits>
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#include <vector>
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#include "absl/status/status.h"
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#include "sandboxed_api/proto_arg.pb.h"
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#include "sandboxed_api/util/statusor.h"
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namespace sapi {
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template <typename T>
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sapi::StatusOr<std::vector<uint8_t>> SerializeProto(const T& proto) {
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static_assert(std::is_base_of<google::protobuf::Message, T>::value,
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"Template argument must be a proto message");
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// Wrap protobuf in a envelope so that we know the name of the protobuf
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// structure when deserializing in the sandboxee.
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ProtoArg proto_arg;
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proto_arg.set_protobuf_data(proto.SerializeAsString());
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proto_arg.set_full_name(proto.GetDescriptor()->full_name());
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std::vector<uint8_t> serialized_proto(proto_arg.ByteSizeLong());
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if (!proto_arg.SerializeToArray(serialized_proto.data(),
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serialized_proto.size())) {
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return absl::InternalError("Unable to serialize proto to array");
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}
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return serialized_proto;
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}
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template <typename T>
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sapi::StatusOr<T> DeserializeProto(const char* data, size_t len) {
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static_assert(std::is_base_of<google::protobuf::Message, T>::value,
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"Template argument must be a proto message");
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ProtoArg envelope;
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if (!envelope.ParseFromArray(data, len)) {
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return absl::InternalError("Unable to parse proto from array");
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}
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auto pb_data = envelope.protobuf_data();
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T result;
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if (!result.ParseFromArray(pb_data.data(), pb_data.size())) {
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return absl::InternalError("Unable to parse proto from envelope data");
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}
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return result;
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}
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} // namespace sapi
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#endif // SANDBOXED_API_PROTO_HELPER_H_
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