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 <random.h>
 6  #include <test/fuzz/FuzzedDataProvider.h>
 7  #include <test/fuzz/fuzz.h>
 8  #include <test/fuzz/util.h>
 9  
10  #include <algorithm>
11  #include <cstdint>
12  #include <string>
13  #include <vector>
14  
15  FUZZ_TARGET(random)
16  {
17      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
18      FastRandomContext fast_random_context{ConsumeUInt256(fuzzed_data_provider)};
19      (void)fast_random_context.rand64();
20      (void)fast_random_context.randbits(fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 64));
21      (void)fast_random_context.randrange(fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(FastRandomContext::min() + 1, FastRandomContext::max()));
22      (void)fast_random_context.randbytes(fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 1024));
23      (void)fast_random_context.rand32();
24      (void)fast_random_context.rand256();
25      (void)fast_random_context.randbool();
26      (void)fast_random_context();
27  
28      std::vector<int64_t> integrals = ConsumeRandomLengthIntegralVector<int64_t>(fuzzed_data_provider);
29      std::shuffle(integrals.begin(), integrals.end(), fast_random_context);
30  }