LCOV - code coverage report
Current view: top level - src/test/fuzz - socks5.cpp (source / functions) Coverage Total Hit
Test: fuzz_coverage.info Lines: 100.0 % 19 19
Test Date: 2026-04-09 09:58:18 Functions: 100.0 % 3 3
Branches: 60.0 % 30 18

             Branch data     Line data    Source code
       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 <netaddress.h>
       6                 :             : #include <netbase.h>
       7                 :             : #include <test/fuzz/FuzzedDataProvider.h>
       8                 :             : #include <test/fuzz/fuzz.h>
       9                 :             : #include <test/fuzz/util.h>
      10                 :             : #include <test/fuzz/util/net.h>
      11                 :             : #include <test/util/setup_common.h>
      12                 :             : #include <test/util/time.h>
      13                 :             : #include <util/time.h>
      14                 :             : 
      15                 :             : #include <cstdint>
      16                 :             : #include <string>
      17                 :             : #include <vector>
      18                 :             : 
      19                 :             : extern std::chrono::milliseconds g_socks5_recv_timeout;
      20                 :             : 
      21                 :             : namespace {
      22                 :             : decltype(g_socks5_recv_timeout) default_socks5_recv_timeout;
      23                 :             : };
      24                 :             : 
      25                 :           1 : void initialize_socks5()
      26                 :             : {
      27   [ +  -  +  -  :           1 :     static const auto testing_setup = MakeNoLogFileContext<const BasicTestingSetup>();
                   +  - ]
      28                 :           1 :     default_socks5_recv_timeout = g_socks5_recv_timeout;
      29                 :           1 : }
      30                 :             : 
      31         [ +  - ]:         502 : FUZZ_TARGET(socks5, .init = initialize_socks5)
      32                 :             : {
      33                 :          44 :     FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
      34                 :          44 :     NodeClockContext clock_ctx{ConsumeTime(fuzzed_data_provider)};
      35         [ +  - ]:          44 :     ProxyCredentials proxy_credentials;
      36         [ +  - ]:          44 :     proxy_credentials.username = fuzzed_data_provider.ConsumeRandomLengthString(512);
      37         [ +  - ]:          44 :     proxy_credentials.password = fuzzed_data_provider.ConsumeRandomLengthString(512);
      38         [ +  + ]:          44 :     if (fuzzed_data_provider.ConsumeBool()) {
      39         [ +  - ]:          13 :         g_socks5_interrupt();
      40                 :             :     }
      41                 :             :     // Set FUZZED_SOCKET_FAKE_LATENCY=1 to exercise recv timeout code paths. This
      42                 :             :     // will slow down fuzzing.
      43   [ +  +  -  + ]:          44 :     g_socks5_recv_timeout = (fuzzed_data_provider.ConsumeBool() && std::getenv("FUZZED_SOCKET_FAKE_LATENCY") != nullptr) ? 1ms : default_socks5_recv_timeout;
      44         [ +  - ]:          44 :     FuzzedSock fuzzed_sock = ConsumeSock(fuzzed_data_provider);
      45                 :             :     // This Socks5(...) fuzzing harness would have caught CVE-2017-18350 within
      46                 :             :     // a few seconds of fuzzing.
      47         [ +  - ]:          44 :     auto str_dest = fuzzed_data_provider.ConsumeRandomLengthString(512);
      48                 :          44 :     auto port = fuzzed_data_provider.ConsumeIntegral<uint16_t>();
      49         [ +  + ]:          44 :     auto* auth = fuzzed_data_provider.ConsumeBool() ? &proxy_credentials : nullptr;
      50         [ +  - ]:          44 :     (void)Socks5(str_dest, port, auth, fuzzed_sock);
      51                 :         132 : }
        

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