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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_FUZZERS_XFA_CODEC_FUZZER_H_
#define TESTING_FUZZERS_XFA_CODEC_FUZZER_H_
#include <memory>
#include "core/fxcodec/codec/ccodec_progressivedecoder.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"
#include "third_party/base/span.h"
#ifdef PDF_ENABLE_XFA_BMP
#include "core/fxcodec/codec/ccodec_bmpmodule.h"
#endif // PDF_ENABLE_XFA_BMP
#ifdef PDF_ENABLE_XFA_GIF
#include "core/fxcodec/codec/ccodec_gifmodule.h"
#endif // PDF_ENABLE_XFA_GIF
#ifdef PDF_ENABLE_XFA_PNG
#include "core/fxcodec/codec/ccodec_pngmodule.h"
#endif // PDF_ENABLE_XFA_PNG
#ifdef PDF_ENABLE_XFA_TIFF
#include "core/fxcodec/codec/ccodec_tiffmodule.h"
#endif // PDF_ENABLE_XFA_TIFF
// Support up to 64 MB. This prevents trivial OOM when MSAN is on and
// time outs.
const int kXFACodecFuzzerPixelLimit = 64000000;
class XFACodecFuzzer {
public:
static int Fuzz(const uint8_t* data, size_t size, FXCODEC_IMAGE_TYPE type) {
auto mgr = pdfium::MakeUnique<CCodec_ModuleMgr>();
#ifdef PDF_ENABLE_XFA_BMP
mgr->SetBmpModule(pdfium::MakeUnique<CCodec_BmpModule>());
#endif // PDF_ENABLE_XFA_BMP
#ifdef PDF_ENABLE_XFA_GIF
mgr->SetGifModule(pdfium::MakeUnique<CCodec_GifModule>());
#endif // PDF_ENABLE_XFA_GIF
#ifdef PDF_ENABLE_XFA_PNG
mgr->SetPngModule(pdfium::MakeUnique<CCodec_PngModule>());
#endif // PDF_ENABLE_XFA_PNG
#ifdef PDF_ENABLE_XFA_TIFF
mgr->SetTiffModule(pdfium::MakeUnique<CCodec_TiffModule>());
#endif // PDF_ENABLE_XFA_TIFF
std::unique_ptr<CCodec_ProgressiveDecoder> decoder =
mgr->CreateProgressiveDecoder();
auto source = pdfium::MakeRetain<CFX_BufferSeekableReadStream>(
pdfium::make_span(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.
FX_SAFE_UINT32 bitmap_size = decoder->GetHeight();
bitmap_size *= decoder->GetWidth();
bitmap_size *= 4; // From CFX_DIBitmap impl.
if (!bitmap_size.IsValid() ||
bitmap_size.ValueOrDie() > kXFACodecFuzzerPixelLimit) {
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_FUZZERS_XFA_CODEC_FUZZER_H_
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