//
// Copyright (C) 2023 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.
#pragma once
#include "common/libs/utils/result.h"
#include <sys/types.h>
#include <cstdint>
#include <memory>
#include <string>
#include <vector>
#include <fruit/fruit.h>
#include "common/libs/fs/shared_fd.h"
#include "common/libs/utils/subprocess.h"
namespace cuttlefish {
// Taken from external/avb/avbtool.py; this define is not in the headers
inline constexpr uint64_t kMaxAvbMetadataSize =
69632ul;
struct ChainPartition {
std::string name;
std::string rollback_index;
std::string key_path;
};
class Avb {
public:
Avb(std::string avbtool_path);
Avb(std::string avbtool_path, std::string algorithm, std::string key);
/**
* AddHashFooter - sign and add hash footer to the partition for
* avb and dm-verity verification
*
* @image_path: path to image to sign
* @partition_name: partition name (without A/B suffix)
* @partition_size_bytes: partition size (in bytes)
*/
Result<
void> AddHashFooter(
const std::string& image_path,
const std::string& partition_name,
const off_t partition_size_bytes)
const;
Result<
void> WriteInfoImage(
const std::string& image_path,
const std::string& output_path)
const;
Result<
void> MakeVbMetaImage(
const std::string& output_path,
const std::vector<ChainPartition>& chained_partitions,
const std::vector<std::string>& included_partitions,
const std::vector<std::string>& extra_arguments);
private:
Command GenerateAddHashFooter(
const std::string& image_path,
const std::string& partition_name,
const off_t partition_size_bytes)
const;
Command GenerateInfoImage(
const std::string& image_path,
const SharedFD& output_path)
const;
Command GenerateMakeVbMetaImage(
const std::string& output_path,
const std::vector<ChainPartition>& chained_partitions,
const std::vector<std::string>& included_partitions,
const std::vector<std::string>& extra_arguments);
std::string avbtool_path_;
std::string algorithm_;
std::string key_;
};
Result<
void> EnforceVbMetaSize(
const std::string& path);
std::unique_ptr<Avb> GetDefaultAvb();
fruit::Component<Avb> CuttlefishKeyAvbComponent();
}
// namespace cuttlefish