autofile.cpp raw

   1  // Copyright (c) 2020-present The Bitcoin Core developers
   2  // Distributed under the MIT software license, see the accompanying
   3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4  
   5  #include <span.h>
   6  #include <streams.h>
   7  #include <test/fuzz/fuzz.h>
   8  #include <test/fuzz/FuzzedDataProvider.h>
   9  #include <test/fuzz/util.h>
  10  #include <util/obfuscation.h>
  11  
  12  #include <array>
  13  #include <cstddef>
  14  #include <cstdio>
  15  #include <iostream>
  16  #include <vector>
  17  
  18  FUZZ_TARGET(autofile)
  19  {
  20      FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
  21      FuzzedFileProvider fuzzed_file_provider{fuzzed_data_provider};
  22      const auto key_bytes{ConsumeFixedLengthByteVector<std::byte>(fuzzed_data_provider, Obfuscation::KEY_SIZE)};
  23      AutoFile auto_file{
  24          fuzzed_file_provider.open(),
  25          Obfuscation{std::span{key_bytes}.first<Obfuscation::KEY_SIZE>()},
  26      };
  27      LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 100)
  28      {
  29          CallOneOf(
  30              fuzzed_data_provider,
  31              [&] {
  32                  std::array<std::byte, 4096> arr{};
  33                  try {
  34                      auto_file.read({arr.data(), fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 4096)});
  35                  } catch (const std::ios_base::failure&) {
  36                  }
  37              },
  38              [&] {
  39                  const std::array<std::byte, 4096> arr{};
  40                  try {
  41                      auto_file.write({arr.data(), fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 4096)});
  42                  } catch (const std::ios_base::failure&) {
  43                  }
  44              },
  45              [&] {
  46                  try {
  47                      auto_file.ignore(fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 4096));
  48                  } catch (const std::ios_base::failure&) {
  49                  }
  50              },
  51              [&] {
  52                  (void)auto_file.fclose();
  53              },
  54              [&] {
  55                  ReadFromStream(fuzzed_data_provider, auto_file);
  56              },
  57              [&] {
  58                  WriteToStream(fuzzed_data_provider, auto_file);
  59              });
  60      }
  61      (void)auto_file.IsNull();
  62      if (fuzzed_data_provider.ConsumeBool()) {
  63          FILE* f = auto_file.release();
  64          if (f != nullptr) {
  65              fclose(f);
  66          }
  67      } else {
  68          (void)auto_file.fclose();
  69      }
  70  }
  71