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  }