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- // Copyright 2018 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 <stddef.h>
- #include <stdint.h>
- #include <fuzzer/FuzzedDataProvider.h>
- #include "base/logging.h"
- #include "base/numerics/safe_conversions.h"
- #include "media/base/decrypt_config.h"
- #include "media/base/subsample_entry.h"
- #include "media/filters/ivf_parser.h"
- #include "media/filters/vp9_parser.h"
- struct Environment {
- Environment() {
- // Disable noisy logging as per "libFuzzer in Chrome" documentation:
- // testing/libfuzzer/getting_started.md#Disable-noisy-error-message-logging.
- logging::SetMinLogLevel(logging::LOG_FATAL);
- }
- };
- Environment* env = new Environment();
- // Entry point for LibFuzzer.
- extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
- FuzzedDataProvider data_provider(data, size);
- std::string key_id = data_provider.ConsumeBytesAsString(4);
- std::string iv = data_provider.ConsumeBytesAsString(16);
- media::Vp9Parser vp9_parser(data_provider.ConsumeBool());
- uint8_t subsample_count_upper_bound = 8;
- uint8_t subsamples_count =
- data_provider.ConsumeIntegral<uint8_t>() % subsample_count_upper_bound;
- std::vector<media::SubsampleEntry> subsamples;
- for (uint8_t entry = 0; entry < subsamples_count; ++entry) {
- if (data_provider.remaining_bytes() >= 2 * sizeof(uint32_t)) {
- uint32_t clear = data_provider.ConsumeIntegral<uint32_t>();
- uint32_t cipher = data_provider.ConsumeIntegral<uint32_t>();
- cipher &= 0xFFFFFFF0; // make sure cipher is a multiple of 16.
- subsamples.push_back(media::SubsampleEntry(clear, cipher));
- }
- }
- const uint8_t* ivf_payload = nullptr;
- media::IvfParser ivf_parser;
- media::IvfFileHeader ivf_file_header;
- media::IvfFrameHeader ivf_frame_header;
- if (!ivf_parser.Initialize(data, size, &ivf_file_header))
- return 0;
- // Parse until the end of stream/unsupported stream/error in stream is found.
- while (ivf_parser.ParseNextFrame(&ivf_frame_header, &ivf_payload)) {
- media::Vp9FrameHeader vp9_frame_header;
- vp9_parser.SetStream(
- ivf_payload, ivf_frame_header.frame_size,
- media::DecryptConfig::CreateCencConfig(key_id, iv, subsamples));
- // TODO(kcwu): further fuzzing the case of Vp9Parser::kAwaitingRefresh.
- std::unique_ptr<media::DecryptConfig> null_config;
- gfx::Size allocate_size;
- while (vp9_parser.ParseNextFrame(&vp9_frame_header, &allocate_size,
- &null_config) == media::Vp9Parser::kOk) {
- // Repeat until all frames processed.
- }
- }
- return 0;
- }
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