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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.
#include <cstdint>
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
#include "core/fxcodec/JBig2_DocumentContext.h"
#include "core/fxcodec/codec/ccodec_jbig2module.h"
#include "core/fxcodec/jbig2/JBig2_Context.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "core/fxge/fx_dib.h"
#include "third_party/base/ptr_util.h"
static uint32_t GetInteger(const uint8_t* data) {
return data[0] | data[1] << 8 | data[2] << 16 | data[3] << 24;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
const size_t kParameterSize = 8;
if (size < kParameterSize)
return 0;
uint32_t width = GetInteger(data);
uint32_t height = GetInteger(data + 4);
size -= kParameterSize;
data += kParameterSize;
static constexpr uint32_t kMemLimit = 512000000; // 512 MB
static constexpr uint32_t k1bppRgbComponents = 4; // From CFX_DIBitmap impl.
FX_SAFE_UINT32 mem = width;
mem *= height;
mem *= k1bppRgbComponents;
if (!mem.IsValid() || mem.ValueOrDie() > kMemLimit)
return 0;
auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (!bitmap->Create(width, height, FXDIB_1bppRgb))
return 0;
auto stream = pdfium::MakeUnique<CPDF_Stream>();
stream->AsStream()->SetData({data, size});
auto src_stream = pdfium::MakeRetain<CPDF_StreamAcc>(stream->AsStream());
src_stream->LoadAllDataRaw();
CCodec_Jbig2Module module;
CCodec_Jbig2Context jbig2_context;
std::unique_ptr<JBig2_DocumentContext> document_context;
FXCODEC_STATUS status = module.StartDecode(
&jbig2_context, &document_context, width, height, src_stream, nullptr,
bitmap->GetBuffer(), bitmap->GetPitch(), nullptr);
while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE)
status = module.ContinueDecode(&jbig2_context, nullptr);
return 0;
}
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