1  // Copyright (c) 2020-2021 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 <common/bloom.h>
 6  #include <test/fuzz/FuzzedDataProvider.h>
 7  #include <test/fuzz/fuzz.h>
 8  #include <test/fuzz/util.h>
 9  #include <uint256.h>
10  
11  #include <cassert>
12  #include <cstdint>
13  #include <optional>
14  #include <string>
15  #include <vector>
16  
17  FUZZ_TARGET(rolling_bloom_filter)
18  {
19      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
20  
21      CRollingBloomFilter rolling_bloom_filter{
22          fuzzed_data_provider.ConsumeIntegralInRange<unsigned int>(1, 1000),
23          0.999 / fuzzed_data_provider.ConsumeIntegralInRange<unsigned int>(1, std::numeric_limits<unsigned int>::max())};
24      LIMITED_WHILE(fuzzed_data_provider.remaining_bytes() > 0, 3000)
25      {
26          CallOneOf(
27              fuzzed_data_provider,
28              [&] {
29                  const std::vector<unsigned char> b = ConsumeRandomLengthByteVector(fuzzed_data_provider);
30                  (void)rolling_bloom_filter.contains(b);
31                  rolling_bloom_filter.insert(b);
32                  const bool present = rolling_bloom_filter.contains(b);
33                  assert(present);
34              },
35              [&] {
36                  const uint256 u256{ConsumeUInt256(fuzzed_data_provider)};
37                  (void)rolling_bloom_filter.contains(u256);
38                  rolling_bloom_filter.insert(u256);
39                  const bool present = rolling_bloom_filter.contains(u256);
40                  assert(present);
41              },
42              [&] {
43                  rolling_bloom_filter.reset();
44              });
45      }
46  }