// Copyright 2014 The Chromium Authors // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "base/at_exit.h" #include "base/command_line.h" #include "base/containers/span.h" #include "base/files/file.h" #include "base/files/file_util.h" #include "base/strings/string_number_conversions.h" #include "net/spdy/fuzzing/hpack_fuzz_util.h" #include "net/third_party/quiche/src/quiche/common/http/http_header_block.h" #include "net/third_party/quiche/src/quiche/http2/core/spdy_protocol.h" #include "net/third_party/quiche/src/quiche/http2/hpack/hpack_constants.h" #include "net/third_party/quiche/src/quiche/http2/hpack/hpack_encoder.h" namespace { // Target file for generated HPACK header sets. const char kFileToWrite[] = "file-to-write"; // Number of header sets to generate. const char kExampleCount[] = "example-count"; } // namespace using spdy::HpackFuzzUtil; using std::map; // Generates a configurable number of header sets (using HpackFuzzUtil), and // sequentially encodes each header set with an HpackEncoder. Encoded header // sets are written to the output file in length-prefixed blocks. int main(int argc, char** argv) { base::AtExitManager exit_manager; base::CommandLine::Init(argc, argv); const base::CommandLine& command_line = *base::CommandLine::ForCurrentProcess(); if (!command_line.HasSwitch(kFileToWrite) || !command_line.HasSwitch(kExampleCount)) { LOG(ERROR) << "Usage: " << argv[0] << " --" << kFileToWrite << "=/path/to/file.out" << " --" << kExampleCount << "=1000"; return -1; } std::string file_to_write = command_line.GetSwitchValueASCII(kFileToWrite); int example_count = 0; base::StringToInt(command_line.GetSwitchValueASCII(kExampleCount), &example_count); DVLOG(1) << "Writing output to " << file_to_write; base::File file_out(base::FilePath::FromUTF8Unsafe(file_to_write), base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE); CHECK(file_out.IsValid()) << file_out.error_details(); HpackFuzzUtil::GeneratorContext context; HpackFuzzUtil::InitializeGeneratorContext(&context); spdy::HpackEncoder encoder; for (int i = 0; i != example_count; ++i) { quiche::HttpHeaderBlock headers = HpackFuzzUtil::NextGeneratedHeaderSet(&context); std::string buffer = encoder.EncodeHeaderBlock(headers); std::string prefix = HpackFuzzUtil::HeaderBlockPrefix(buffer.size()); CHECK(file_out.WriteAtCurrentPos(base::as_byte_span(prefix)).has_value()); CHECK(file_out.WriteAtCurrentPos(base::as_byte_span(buffer)).has_value()); } CHECK(file_out.Flush()); DVLOG(1) << "Generated " << example_count << " blocks."; return 0; }