1 // Copyright 2016 The PDFium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include <stdint.h>
6
7 #include "core/fxcodec/jbig2/JBig2_Context.h"
8 #include "core/fxcodec/jbig2/JBig2_DocumentContext.h"
9 #include "core/fxcodec/jbig2/jbig2_decoder.h"
10 #include "core/fxcrt/fx_safe_types.h"
11 #include "core/fxge/dib/cfx_dibitmap.h"
12 #include "core/fxge/dib/fx_dib.h"
13 #include "testing/fuzzers/pdfium_fuzzer_util.h"
14
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)15 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
16 const size_t kParameterSize = 8;
17 if (size < kParameterSize)
18 return 0;
19
20 uint32_t width = GetInteger(data);
21 uint32_t height = GetInteger(data + 4);
22 size -= kParameterSize;
23 data += kParameterSize;
24
25 static constexpr uint32_t kMemLimit = 512000000; // 512 MB
26 static constexpr uint32_t k1bppRgbComponents = 4; // From CFX_DIBitmap impl.
27 FX_SAFE_UINT32 mem = width;
28 mem *= height;
29 mem *= k1bppRgbComponents;
30 if (!mem.IsValid() || mem.ValueOrDie() > kMemLimit)
31 return 0;
32
33 auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
34 if (!bitmap->Create(width, height, FXDIB_Format::k1bppRgb))
35 return 0;
36
37 JBig2_DocumentContext document_context;
38 Jbig2Context jbig2_context;
39 FXCODEC_STATUS status = Jbig2Decoder::StartDecode(
40 &jbig2_context, &document_context, width, height, {data, size}, 1, {}, 0,
41 bitmap->GetWritableBuffer(), bitmap->GetPitch(), nullptr);
42
43 while (status == FXCODEC_STATUS::kDecodeToBeContinued)
44 status = Jbig2Decoder::ContinueDecode(&jbig2_context, nullptr);
45 return 0;
46 }
47