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//
// Copyright 2019 The Android Open Source Project
//
// 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.
//
#ifndef UPDATE_ENGINE_PAYLOAD_GENERATOR_PAYLOAD_PROPERTIES_H_
#define UPDATE_ENGINE_PAYLOAD_GENERATOR_PAYLOAD_PROPERTIES_H_
#include <string>
#include <brillo/key_value_store.h>
#include <brillo/secure_blob.h>
namespace chromeos_update_engine {
// A class for extracting information about a payload from the payload file
// itself. Currently the metadata can be exported as a json file or a key/value
// properties file. But more can be added if required.
class PayloadProperties {
public:
explicit PayloadProperties(const std::string& payload_path);
~PayloadProperties() = default;
// Get the properties in a json format. The json file will be used in
// autotests, cros flash, etc. Mainly in Chrome OS.
bool GetPropertiesAsJson(std::string* json_str);
// Get the properties of the payload as a key/value store. This is mainly used
// in Android.
bool GetPropertiesAsKeyValue(std::string* key_value_str);
private:
// Does the main job of reading the payload and extracting information from
// it.
bool LoadFromPayload();
// The path to the payload file.
std::string payload_path_;
// The version of the metadata json format. If the output json file changes
// format, this needs to be increased.
int version_{2};
size_t metadata_size_;
std::string metadata_hash_;
std::string metadata_signatures_;
size_t payload_size_;
std::string payload_hash_;
// Whether the payload is a delta (true) or full (false).
bool is_delta_;
DISALLOW_COPY_AND_ASSIGN(PayloadProperties);
};
} // namespace chromeos_update_engine
#endif // UPDATE_ENGINE_PAYLOAD_GENERATOR_PAYLOAD_PROPERTIES_H_
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