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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "components/zucchini/zucchini_commands.h"
#include <stddef.h>
#include <stdint.h>
#include <ostream>
#include <string>
#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 "components/zucchini/buffer_view.h"
#include "components/zucchini/crc32.h"
#include "components/zucchini/encoded_view.h"
#include "components/zucchini/image_index.h"
#include "components/zucchini/io_utils.h"
#include "components/zucchini/mapped_file.h"
#include "components/zucchini/patch_writer.h"
#include "components/zucchini/suffix_array.h"
#include "components/zucchini/zucchini_integration.h"
#include "components/zucchini/zucchini_tools.h"
namespace {
using zucchini::status::kStatusFileReadError;
using zucchini::status::kStatusSuccess;
/******** Command-line Switches ********/
constexpr char kSwitchDump[] = "dump";
constexpr char kSwitchImpose[] = "impose";
constexpr char kSwitchKeep[] = "keep";
constexpr char kSwitchRaw[] = "raw";
constexpr char kSwitchStartScanAt[] = "start-scan-at";
class WrappedMappedFileReader : public zucchini::MappedFileReader {
public:
static constexpr uint32_t read_flags = base::File::FLAG_OPEN |
base::File::FLAG_READ |
base::File::FLAG_WIN_SHARE_DELETE;
explicit WrappedMappedFileReader(const base::FilePath& path)
: MappedFileReader(base::File(path, read_flags)) {
if (HasError()) {
LOG(ERROR) << "Error reading file " << path.value() << ": " << error();
status = kStatusFileReadError;
}
}
zucchini::status::Code status = kStatusSuccess;
};
zucchini::GenerateOptions ReadGenerateOptions(const MainParams& params) {
zucchini::GenerateOptions options{
.imposed_matches =
params.command_line->GetSwitchValueASCII(kSwitchImpose),
.is_raw = params.command_line->HasSwitch(kSwitchRaw),
};
if (params.command_line->HasSwitch(kSwitchStartScanAt)) {
const std::string s =
params.command_line->GetSwitchValueASCII(kSwitchStartScanAt);
std::istringstream(s) >> options.start_scan_at;
}
return options;
}
} // namespace
/******** Various Main*() functions ********/
zucchini::status::Code MainGen(MainParams params) {
zucchini::GenerateOptions options = ReadGenerateOptions(params);
CHECK_EQ(3U, params.file_paths->size());
return zucchini::Generate((*params.file_paths)[0], (*params.file_paths)[1],
(*params.file_paths)[2], options,
params.command_line->HasSwitch(kSwitchKeep));
}
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],
params.command_line->HasSwitch(kSwitchKeep));
}
zucchini::status::Code MainVerify(MainParams params) {
CHECK_EQ(1U, params.file_paths->size());
return zucchini::VerifyPatch((*params.file_paths)[0]);
}
zucchini::status::Code MainRead(MainParams params) {
CHECK_EQ(1U, params.file_paths->size());
WrappedMappedFileReader input((*params.file_paths)[0]);
if (input.status != kStatusSuccess)
return input.status;
bool do_dump = params.command_line->HasSwitch(kSwitchDump);
zucchini::status::Code status = zucchini::ReadReferences(
{input.data(), input.length()}, do_dump, *params.out);
if (status != kStatusSuccess)
*params.err << "Fatal error found when dumping references." << std::endl;
return status;
}
zucchini::status::Code MainDetect(MainParams params) {
zucchini::GenerateOptions options = ReadGenerateOptions(params);
CHECK_EQ(1U, params.file_paths->size());
WrappedMappedFileReader input((*params.file_paths)[0]);
if (input.status != kStatusSuccess)
return input.status;
std::vector<zucchini::ConstBufferView> sub_image_list;
zucchini::status::Code result = zucchini::DetectAll(
{input.data(), input.length()}, options, *params.out, &sub_image_list);
if (result != kStatusSuccess)
*params.err << "Fatal error found when detecting executables." << std::endl;
return result;
}
zucchini::status::Code MainMatch(MainParams params) {
zucchini::GenerateOptions options = ReadGenerateOptions(params);
CHECK_EQ(2U, params.file_paths->size());
WrappedMappedFileReader old_image((*params.file_paths)[0]);
if (old_image.status != kStatusSuccess)
return old_image.status;
WrappedMappedFileReader new_image((*params.file_paths)[1]);
if (new_image.status != kStatusSuccess)
return new_image.status;
zucchini::status::Code status = zucchini::MatchAll(
{old_image.data(), old_image.length()},
{new_image.data(), new_image.length()}, options, *params.out);
if (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());
WrappedMappedFileReader input((*params.file_paths)[0]);
if (input.status != kStatusSuccess)
return input.status;
uint32_t crc =
zucchini::CalculateCrc32(input.data(), input.data() + input.length());
*params.out << "CRC32: " << zucchini::AsHex<8>(crc) << std::endl;
return kStatusSuccess;
}
zucchini::status::Code MainSuffixArray(MainParams params) {
CHECK_EQ(1U, params.file_paths->size());
WrappedMappedFileReader input((*params.file_paths)[0]);
if (input.status != kStatusSuccess)
return input.status;
zucchini::ImageIndex image_index(input.region());
zucchini::EncodedView view_raw(image_index);
std::vector<zucchini::offset_t> sa_raw =
zucchini::MakeSuffixArray<zucchini::InducedSuffixSort>(view_raw,
size_t(256));
return kStatusSuccess;
}
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