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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/zucchini/zucchini_commands.h"
#include <stddef.h>
#include <stdint.h>
#include <ostream>
#include <utility>
#include "base/command_line.h"
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/files/memory_mapped_file.h"
#include "base/logging.h"
#include "base/macros.h"
#include "components/zucchini/buffer_view.h"
#include "components/zucchini/crc32.h"
#include "components/zucchini/io_utils.h"
#include "components/zucchini/mapped_file.h"
#include "components/zucchini/patch_writer.h"
#include "components/zucchini/zucchini_integration.h"
#include "components/zucchini/zucchini_tools.h"
namespace {
/******** Command-line Switches ********/
constexpr char kSwitchDump[] = "dump";
constexpr char kSwitchRaw[] = "raw";
} // namespace
zucchini::status::Code MainGen(MainParams params) {
CHECK_EQ(3U, params.file_paths.size());
// TODO(huangs): Move implementation to zucchini_integration.cc.
using base::File;
File old_file(params.file_paths[0], File::FLAG_OPEN | File::FLAG_READ);
zucchini::MappedFileReader old_image(std::move(old_file));
if (old_image.HasError()) {
LOG(ERROR) << "Error with file " << params.file_paths[0].value() << ": "
<< old_image.error();
return zucchini::status::kStatusFileReadError;
}
File new_file(params.file_paths[1], File::FLAG_OPEN | File::FLAG_READ);
zucchini::MappedFileReader new_image(std::move(new_file));
if (new_image.HasError()) {
LOG(ERROR) << "Error with file " << params.file_paths[1].value() << ": "
<< new_image.error();
return zucchini::status::kStatusFileReadError;
}
zucchini::EnsemblePatchWriter patch_writer(old_image.region(),
new_image.region());
auto generate = params.command_line.HasSwitch(kSwitchRaw)
? zucchini::GenerateRaw
: zucchini::GenerateEnsemble;
zucchini::status::Code result =
generate(old_image.region(), new_image.region(), &patch_writer);
if (result != zucchini::status::kStatusSuccess) {
params.out << "Fatal error encountered when generating patch." << std::endl;
return result;
}
// By default, delete patch on destruction, to avoid having lingering files in
// case of a failure. On Windows deletion can be done by the OS.
File patch_file(params.file_paths[2], File::FLAG_CREATE_ALWAYS |
File::FLAG_READ | File::FLAG_WRITE |
File::FLAG_SHARE_DELETE |
File::FLAG_CAN_DELETE_ON_CLOSE);
zucchini::MappedFileWriter patch(params.file_paths[2], std::move(patch_file),
patch_writer.SerializedSize());
if (patch.HasError()) {
LOG(ERROR) << "Error with file " << params.file_paths[2].value() << ": "
<< patch.error();
return zucchini::status::kStatusFileWriteError;
}
if (!patch_writer.SerializeInto(patch.region()))
return zucchini::status::kStatusPatchWriteError;
// Successfully created patch. Explicitly request file to be kept.
if (!patch.Keep())
return zucchini::status::kStatusFileWriteError;
return zucchini::status::kStatusSuccess;
}
zucchini::status::Code MainApply(MainParams params) {
CHECK_EQ(3U, params.file_paths.size());
return zucchini::Apply(params.file_paths[0], params.file_paths[1],
params.file_paths[2]);
}
zucchini::status::Code MainRead(MainParams params) {
CHECK_EQ(1U, params.file_paths.size());
base::File input_file(params.file_paths[0],
base::File::FLAG_OPEN | base::File::FLAG_READ);
zucchini::MappedFileReader input(std::move(input_file));
if (input.HasError()) {
LOG(ERROR) << "Error with file " << params.file_paths[0].value() << ": "
<< input.error();
return zucchini::status::kStatusFileReadError;
}
bool do_dump = params.command_line.HasSwitch(kSwitchDump);
zucchini::status::Code status = zucchini::ReadReferences(
{input.data(), input.length()}, do_dump, params.out);
if (status != zucchini::status::kStatusSuccess)
params.err << "Fatal error found when dumping references." << std::endl;
return status;
}
zucchini::status::Code MainDetect(MainParams params) {
CHECK_EQ(1U, params.file_paths.size());
base::File input_file(params.file_paths[0],
base::File::FLAG_OPEN | base::File::FLAG_READ);
zucchini::MappedFileReader input(std::move(input_file));
if (input.HasError()) {
LOG(ERROR) << "Error with file " << params.file_paths[0].value() << ": "
<< input.error();
return zucchini::status::kStatusFileReadError;
}
std::vector<zucchini::ConstBufferView> sub_image_list;
zucchini::status::Code result = zucchini::DetectAll(
{input.data(), input.length()}, params.out, &sub_image_list);
if (result != zucchini::status::kStatusSuccess)
params.err << "Fatal error found when detecting executables." << std::endl;
return result;
}
zucchini::status::Code MainMatch(MainParams params) {
CHECK_EQ(2U, params.file_paths.size());
using base::File;
File old_file(params.file_paths[0], File::FLAG_OPEN | File::FLAG_READ);
zucchini::MappedFileReader old_image(std::move(old_file));
if (old_image.HasError()) {
LOG(ERROR) << "Error with file " << params.file_paths[0].value() << ": "
<< old_image.error();
return zucchini::status::kStatusFileReadError;
}
File new_file(params.file_paths[1], File::FLAG_OPEN | File::FLAG_READ);
zucchini::MappedFileReader new_image(std::move(new_file));
if (old_image.HasError()) {
LOG(ERROR) << "Error with file " << params.file_paths[1].value() << ": "
<< new_image.error();
return zucchini::status::kStatusFileReadError;
}
zucchini::status::Code status =
zucchini::MatchAll({old_image.data(), old_image.length()},
{new_image.data(), new_image.length()}, params.out);
if (status != zucchini::status::kStatusSuccess)
params.err << "Fatal error found when matching executables." << std::endl;
return status;
}
zucchini::status::Code MainCrc32(MainParams params) {
CHECK_EQ(1U, params.file_paths.size());
base::File image_file(params.file_paths[0],
base::File::FLAG_OPEN | base::File::FLAG_READ);
zucchini::MappedFileReader image(std::move(image_file));
if (image.HasError()) {
LOG(ERROR) << "Error with file " << params.file_paths[0].value() << ": "
<< image.error();
return zucchini::status::kStatusFileReadError;
}
uint32_t crc =
zucchini::CalculateCrc32(image.data(), image.data() + image.length());
params.out << "CRC32: " << zucchini::AsHex<8>(crc) << std::endl;
return zucchini::status::kStatusSuccess;
}
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