| // Copyright 2021 The Chromium OS 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 <base/check.h> |
| #include <base/files/file.h> |
| #include <base/files/file_path.h> |
| #include <base/files/scoped_temp_dir.h> |
| #include <base/logging.h> |
| #include <base/time/time.h> |
| #include <fuzzer/FuzzedDataProvider.h> |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include "bootid-logger/bootid_logger.h" |
| #include "bootid-logger/constants.h" |
| |
| namespace { |
| |
| class Environment { |
| public: |
| Environment() { logging::SetMinLogLevel(logging::LOGGING_FATAL); } |
| }; |
| |
| extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { |
| static Environment env; |
| |
| FuzzedDataProvider data_provider(data, size); |
| |
| ExtractBootId(data_provider.ConsumeBytesAsString(kBootIdLength)); |
| ExtractBootId(data_provider.ConsumeBytesAsString(kBootEntryLocalTimeLength)); |
| ExtractBootId( |
| data_provider.ConsumeRandomLengthString(kBootEntryLocalTimeLength)); |
| |
| base::ScopedTempDir tmp_dir; |
| CHECK(tmp_dir.CreateUniqueTempDir()); |
| base::FilePath file_path = tmp_dir.GetPath().Append("tmpFile"); |
| |
| const std::string& cur_boot_id = |
| data_provider.ConsumeBytesAsString(kBootIdLength); |
| // Boot id must be 32 hexadecimal digits. |
| if (cur_boot_id.length() != kBootIdLength) |
| return 0; |
| |
| base::Time now = |
| base::Time::FromTimeT(data_provider.ConsumeIntegral<time_t>()); |
| base::Time keep = |
| base::Time::FromTimeT(data_provider.ConsumeIntegral<time_t>()); |
| size_t max_entries = data_provider.ConsumeIntegral<size_t>(); |
| |
| // Put all remaining bytes in the file. |
| auto path = base::FilePath(file_path); |
| base::File file(path, |
| base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE); |
| if (!file.created()) { |
| LOG(ERROR) << "Failed to create " << file_path.value(); |
| return 0; |
| } |
| |
| const std::string& file_contents = |
| data_provider.ConsumeRemainingBytesAsString(); |
| file.Write(0, file_contents.c_str(), file_contents.length()); |
| |
| WriteBootEntry(path, cur_boot_id, now, keep, max_entries); |
| |
| return 0; |
| } |
| } // namespace |