47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
// 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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#include <stdint.h>
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#include "core/fxcodec/jbig2/JBig2_Context.h"
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#include "core/fxcodec/jbig2/JBig2_DocumentContext.h"
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#include "core/fxcodec/jbig2/jbig2_decoder.h"
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#include "core/fxcrt/fx_safe_types.h"
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#include "core/fxge/dib/cfx_dibitmap.h"
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#include "core/fxge/dib/fx_dib.h"
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#include "testing/fuzzers/pdfium_fuzzer_util.h"
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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const size_t kParameterSize = 8;
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if (size < kParameterSize)
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return 0;
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uint32_t width = GetInteger(data);
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uint32_t height = GetInteger(data + 4);
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size -= kParameterSize;
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data += kParameterSize;
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static constexpr uint32_t kMemLimit = 512000000; // 512 MB
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static constexpr uint32_t k1bppRgbComponents = 4; // From CFX_DIBitmap impl.
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FX_SAFE_UINT32 mem = width;
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mem *= height;
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mem *= k1bppRgbComponents;
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if (!mem.IsValid() || mem.ValueOrDie() > kMemLimit)
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return 0;
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auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
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if (!bitmap->Create(width, height, FXDIB_Format::k1bppRgb))
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return 0;
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JBig2_DocumentContext document_context;
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Jbig2Context jbig2_context;
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FXCODEC_STATUS status = Jbig2Decoder::StartDecode(
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&jbig2_context, &document_context, width, height, {data, size}, 1, {}, 0,
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bitmap->GetBuffer(), bitmap->GetPitch(), nullptr);
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while (status == FXCODEC_STATUS::kDecodeToBeContinued)
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status = Jbig2Decoder::ContinueDecode(&jbig2_context, nullptr);
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return 0;
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}
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