text: // Copyright (c) 2020-2021 The Widecoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include <netaddress.h>
  #include <netbase.h>
  #include <test/fuzz/FuzzedDataProvider.h>
  #include <test/fuzz/fuzz.h>
  #include <test/fuzz/util.h>
  #include <test/util/setup_common.h>
  
  #include <cstdint>
  #include <string>
  #include <vector>
  
  namespace {
  int default_socks5_recv_timeout;
  };
  
  extern int g_socks5_recv_timeout;
  
  void initialize_socks5()
  {
      static const auto testing_setup = MakeNoLogFileContext<const BasicTestingSetup>();
      default_socks5_recv_timeout = g_socks5_recv_timeout;
  }
  
  FUZZ_TARGET_INIT(socks5, initialize_socks5)
  {
      FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
      ProxyCredentials proxy_credentials;
      proxy_credentials.username = fuzzed_data_provider.ConsumeRandomLengthString(512);
      proxy_credentials.password = fuzzed_data_provider.ConsumeRandomLengthString(512);
      InterruptSocks5(fuzzed_data_provider.ConsumeBool());
      // Set FUZZED_SOCKET_FAKE_LATENCY=1 to exercise recv timeout code paths. This
      // will slow down fuzzing.
      g_socks5_recv_timeout = (fuzzed_data_provider.ConsumeBool() && std::getenv("FUZZED_SOCKET_FAKE_LATENCY") != nullptr) ? 1 : default_socks5_recv_timeout;
      FuzzedSock fuzzed_sock = ConsumeSock(fuzzed_data_provider);
      // This Socks5(...) fuzzing harness would have caught CVE-2017-18350 within
      // a few seconds of fuzzing.
      (void)Socks5(fuzzed_data_provider.ConsumeRandomLengthString(512),
                   fuzzed_data_provider.ConsumeIntegral<uint16_t>(),
                   fuzzed_data_provider.ConsumeBool() ? &proxy_credentials : nullptr,
                   fuzzed_sock);
  }
  