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// Copyright 2016 The PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef TESTING_LIBFUZZER_XFA_CODEC_FUZZER_H_
#define TESTING_LIBFUZZER_XFA_CODEC_FUZZER_H_
#include <memory>
#include "core/fxcodec/codec/ccodec_bmpmodule.h"
#include "core/fxcodec/codec/ccodec_gifmodule.h"
#include "core/fxcodec/codec/ccodec_pngmodule.h"
#include "core/fxcodec/codec/ccodec_progressivedecoder.h"
#include "core/fxcodec/codec/ccodec_tiffmodule.h"
#include "core/fxcodec/fx_codec.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "testing/fx_string_testhelpers.h"
#include "third_party/base/ptr_util.h"
// Support up to 512 MB. This prevents trivial OOM when MSAN is on.
const int kXFACodecFuzzerPixelLimit = 512000000;
class XFACodecFuzzer {
public:
static int Fuzz(const uint8_t* data, size_t size, FXCODEC_IMAGE_TYPE type) {
auto mgr = pdfium::MakeUnique<CCodec_ModuleMgr>();
mgr->SetBmpModule(pdfium::MakeUnique<CCodec_BmpModule>());
mgr->SetGifModule(pdfium::MakeUnique<CCodec_GifModule>());
mgr->SetPngModule(pdfium::MakeUnique<CCodec_PngModule>());
mgr->SetTiffModule(pdfium::MakeUnique<CCodec_TiffModule>());
std::unique_ptr<CCodec_ProgressiveDecoder> decoder =
mgr->CreateProgressiveDecoder();
auto source = pdfium::MakeRetain<CFX_BufferSeekableReadStream>(data, size);
FXCODEC_STATUS status = decoder->LoadImageInfo(source, type, nullptr, true);
if (status != FXCODEC_STATUS_FRAME_READY)
return 0;
// Skipping very large images, since they will take a long time and may lead
// to OOM.
if (decoder->GetHeight() != 0 &&
decoder->GetWidth() > kXFACodecFuzzerPixelLimit / decoder->GetHeight())
return 0;
auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
bitmap->Create(decoder->GetWidth(), decoder->GetHeight(), FXDIB_Argb);
size_t frames;
std::tie(status, frames) = decoder->GetFrames();
if (status != FXCODEC_STATUS_DECODE_READY || frames == 0)
return 0;
status = decoder->StartDecode(bitmap, 0, 0, bitmap->GetWidth(),
bitmap->GetHeight());
while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE)
status = decoder->ContinueDecode();
return 0;
}
};
#endif // TESTING_LIBFUZZER_XFA_CODEC_FUZZER_H_
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