xfa_codec_fuzzer.h revision 5ae9d0c6fd838a2967cca72aa5751b51dadc2769 
1// Copyright 2016 The PDFium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef TESTING_LIBFUZZER_XFA_CODEC_FUZZER_H_
6#define TESTING_LIBFUZZER_XFA_CODEC_FUZZER_H_
7
8#include <memory>
9
10#include "core/fxcodec/codec/ccodec_bmpmodule.h"
11#include "core/fxcodec/codec/ccodec_gifmodule.h"
12#include "core/fxcodec/codec/ccodec_pngmodule.h"
13#include "core/fxcodec/codec/ccodec_progressivedecoder.h"
14#include "core/fxcodec/codec/ccodec_tiffmodule.h"
15#include "core/fxcodec/fx_codec.h"
16#include "core/fxcrt/fx_stream.h"
17#include "third_party/base/ptr_util.h"
18
19class XFACodecFuzzer {
20 public:
21  static int Fuzz(const uint8_t* data, size_t size, FXCODEC_IMAGE_TYPE type) {
22    auto mgr = pdfium::MakeUnique<CCodec_ModuleMgr>();
23    mgr->SetBmpModule(pdfium::MakeUnique<CCodec_BmpModule>());
24    mgr->SetGifModule(pdfium::MakeUnique<CCodec_GifModule>());
25    mgr->SetPngModule(pdfium::MakeUnique<CCodec_PngModule>());
26    mgr->SetTiffModule(pdfium::MakeUnique<CCodec_TiffModule>());
27
28    std::unique_ptr<CCodec_ProgressiveDecoder> decoder =
29        mgr->CreateProgressiveDecoder();
30    CFX_RetainPtr<Reader> source(new Reader(data, size));
31    FXCODEC_STATUS status = decoder->LoadImageInfo(source, type, nullptr, true);
32    if (status != FXCODEC_STATUS_FRAME_READY)
33      return 0;
34
35    std::unique_ptr<CFX_DIBitmap> bitmap(new CFX_DIBitmap);
36    bitmap->Create(decoder->GetWidth(), decoder->GetHeight(), FXDIB_Argb);
37
38    int32_t frames;
39    if (decoder->GetFrames(frames) != FXCODEC_STATUS_DECODE_READY ||
40        frames == 0)
41      return 0;
42
43    status = decoder->StartDecode(bitmap.get(), 0, 0, bitmap->GetWidth(),
44                                  bitmap->GetHeight());
45    while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE)
46      status = decoder->ContinueDecode();
47
48    return 0;
49  }
50
51 private:
52  class Reader : public IFX_SeekableReadStream {
53   public:
54    Reader(const uint8_t* data, size_t size) : m_data(data), m_size(size) {}
55    ~Reader() {}
56
57    bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override {
58      if (offset < 0 || static_cast<size_t>(offset) >= m_size)
59        return false;
60      if (offset + size > m_size)
61        size = m_size - offset;
62      if (size == 0)
63        return false;
64
65      memcpy(buffer, m_data + offset, size);
66      return true;
67    }
68
69    FX_FILESIZE GetSize() override { return static_cast<FX_FILESIZE>(m_size); }
70
71   private:
72    const uint8_t* const m_data;
73    size_t m_size;
74  };
75};
76
77#endif  // TESTING_LIBFUZZER_XFA_CODEC_FUZZER_H_
78