64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
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// Copyright 2016 The PDFium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef TESTING_FUZZERS_XFA_CODEC_FUZZER_H_
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#define TESTING_FUZZERS_XFA_CODEC_FUZZER_H_
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#include <memory>
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#include <utility>
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#include "core/fxcodec/fx_codec.h"
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#include "core/fxcodec/progressive_decoder.h"
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#include "core/fxcrt/cfx_read_only_span_stream.h"
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#include "core/fxcrt/fx_safe_types.h"
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#include "core/fxcrt/retain_ptr.h"
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#include "core/fxge/dib/cfx_dibitmap.h"
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#include "third_party/base/span.h"
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// Support up to 64 MB. This prevents trivial OOM when MSAN is on and
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// time outs.
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const int kXFACodecFuzzerPixelLimit = 64000000;
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class XFACodecFuzzer {
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public:
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static int Fuzz(const uint8_t* data, size_t size, FXCODEC_IMAGE_TYPE type) {
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auto decoder = std::make_unique<ProgressiveDecoder>();
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auto source = pdfium::MakeRetain<CFX_ReadOnlySpanStream>(
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pdfium::make_span(data, size));
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CFX_DIBAttribute attr;
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FXCODEC_STATUS status =
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decoder->LoadImageInfo(std::move(source), type, &attr, true);
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if (status != FXCODEC_STATUS::kFrameReady)
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return 0;
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// Skipping very large images, since they will take a long time and may lead
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// to OOM.
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FX_SAFE_UINT32 bitmap_size = decoder->GetHeight();
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bitmap_size *= decoder->GetWidth();
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bitmap_size *= 4; // From CFX_DIBitmap impl.
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if (!bitmap_size.IsValid() ||
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bitmap_size.ValueOrDie() > kXFACodecFuzzerPixelLimit) {
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return 0;
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}
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auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
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bitmap->Create(decoder->GetWidth(), decoder->GetHeight(),
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FXDIB_Format::kArgb);
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size_t frames;
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std::tie(status, frames) = decoder->GetFrames();
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if (status != FXCODEC_STATUS::kDecodeReady || frames == 0)
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return 0;
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status = decoder->StartDecode(bitmap, 0, 0, bitmap->GetWidth(),
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bitmap->GetHeight());
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while (status == FXCODEC_STATUS::kDecodeToBeContinued)
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status = decoder->ContinueDecode();
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return 0;
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}
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};
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#endif // TESTING_FUZZERS_XFA_CODEC_FUZZER_H_
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