testing/fuzzers/pdf_cfx_barcode_fuzzer.cc

// Copyright 2017 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "core/fxcrt/compiler_specific.h"
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/span.h"
#include "fxbarcode/cfx_barcode.h"

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
  if (size < 2 * sizeof(uint16_t)) {
    return 0;
  }

  // SAFETY: trusted arguments from fuzzer.
  auto span = UNSAFE_BUFFERS(pdfium::span(data, size));

  BC_TYPE type =
      static_cast<BC_TYPE>(data[0] % (static_cast<int>(BC_TYPE::kLast) + 1));

  // Only used one byte, but align with uint16_t for string below.
  span = span.subspan(sizeof(uint16_t));

  auto barcode = CFX_Barcode::Create(type);

  // TODO(tsepez): Setup more options from |data|.
  barcode->SetModuleHeight(300);
  barcode->SetModuleWidth(420);
  barcode->SetHeight(298);
  barcode->SetWidth(418);

  WideString content = WideString::FromUTF16LE(span);
  if (!barcode->Encode(content.AsStringView())) {
    return 0;
  }

  // TODO(tsepez): Output to device.
  return 0;
}