text: // Copyright (c) 2020 The Samcoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include <crypto/common.h>
  #include <test/fuzz/FuzzedDataProvider.h>
  #include <test/fuzz/fuzz.h>
  #include <test/fuzz/util.h>
  
  #include <array>
  #include <cassert>
  #include <cstdint>
  #include <cstring>
  #include <vector>
  
  FUZZ_TARGET(crypto_common)
  {
      FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
      const uint16_t random_u16 = fuzzed_data_provider.ConsumeIntegral<uint16_t>();
      const uint32_t random_u32 = fuzzed_data_provider.ConsumeIntegral<uint32_t>();
      const uint64_t random_u64 = fuzzed_data_provider.ConsumeIntegral<uint64_t>();
      const std::vector<uint8_t> random_bytes_2 = ConsumeFixedLengthByteVector(fuzzed_data_provider, 2);
      const std::vector<uint8_t> random_bytes_4 = ConsumeFixedLengthByteVector(fuzzed_data_provider, 4);
      const std::vector<uint8_t> random_bytes_8 = ConsumeFixedLengthByteVector(fuzzed_data_provider, 8);
  
      std::array<uint8_t, 2> writele16_arr;
      WriteLE16(writele16_arr.data(), random_u16);
      assert(ReadLE16(writele16_arr.data()) == random_u16);
  
      std::array<uint8_t, 4> writele32_arr;
      WriteLE32(writele32_arr.data(), random_u32);
      assert(ReadLE32(writele32_arr.data()) == random_u32);
  
      std::array<uint8_t, 8> writele64_arr;
      WriteLE64(writele64_arr.data(), random_u64);
      assert(ReadLE64(writele64_arr.data()) == random_u64);
  
      std::array<uint8_t, 4> writebe32_arr;
      WriteBE32(writebe32_arr.data(), random_u32);
      assert(ReadBE32(writebe32_arr.data()) == random_u32);
  
      std::array<uint8_t, 8> writebe64_arr;
      WriteBE64(writebe64_arr.data(), random_u64);
      assert(ReadBE64(writebe64_arr.data()) == random_u64);
  
      const uint16_t readle16_result = ReadLE16(random_bytes_2.data());
      std::array<uint8_t, 2> readle16_arr;
      WriteLE16(readle16_arr.data(), readle16_result);
      assert(std::memcmp(random_bytes_2.data(), readle16_arr.data(), 2) == 0);
  
      const uint32_t readle32_result = ReadLE32(random_bytes_4.data());
      std::array<uint8_t, 4> readle32_arr;
      WriteLE32(readle32_arr.data(), readle32_result);
      assert(std::memcmp(random_bytes_4.data(), readle32_arr.data(), 4) == 0);
  
      const uint64_t readle64_result = ReadLE64(random_bytes_8.data());
      std::array<uint8_t, 8> readle64_arr;
      WriteLE64(readle64_arr.data(), readle64_result);
      assert(std::memcmp(random_bytes_8.data(), readle64_arr.data(), 8) == 0);
  
      const uint32_t readbe32_result = ReadBE32(random_bytes_4.data());
      std::array<uint8_t, 4> readbe32_arr;
      WriteBE32(readbe32_arr.data(), readbe32_result);
      assert(std::memcmp(random_bytes_4.data(), readbe32_arr.data(), 4) == 0);
  
      const uint64_t readbe64_result = ReadBE64(random_bytes_8.data());
      std::array<uint8_t, 8> readbe64_arr;
      WriteBE64(readbe64_arr.data(), readbe64_result);
      assert(std::memcmp(random_bytes_8.data(), readbe64_arr.data(), 8) == 0);
  }
  