LCOV - code coverage report
Current view: top level - src/test/fuzz - muhash.cpp (source / functions) Hit Total Coverage
Test: fuzz_coverage.info Lines: 2 38 5.3 %
Date: 2023-11-06 23:13:05 Functions: 1 7 14.3 %
Branches: 2 20 10.0 %

           Branch data     Line data    Source code
       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 <crypto/muhash.h>
       6                 :            : #include <test/fuzz/FuzzedDataProvider.h>
       7                 :            : #include <test/fuzz/fuzz.h>
       8                 :            : #include <test/fuzz/util.h>
       9                 :            : 
      10                 :            : #include <vector>
      11                 :            : 
      12 [ +  - ][ +  - ]:          6 : FUZZ_TARGET(muhash)
      13                 :            : {
      14                 :          0 :     FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
      15                 :          0 :     std::vector<uint8_t> data{ConsumeRandomLengthByteVector(fuzzed_data_provider)};
      16                 :          0 :     std::vector<uint8_t> data2{ConsumeRandomLengthByteVector(fuzzed_data_provider)};
      17                 :            : 
      18                 :          0 :     MuHash3072 muhash;
      19                 :            : 
      20         [ #  # ]:          0 :     muhash.Insert(data);
      21         [ #  # ]:          0 :     muhash.Insert(data2);
      22                 :            : 
      23         [ #  # ]:          0 :     const std::string initial_state_hash{"dd5ad2a105c2d29495f577245c357409002329b9f4d6182c0af3dc2f462555c8"};
      24         [ #  # ]:          0 :     uint256 out;
      25         [ #  # ]:          2 :     uint256 out2;
      26         [ #  # ]:          0 :     CallOneOf(
      27                 :            :         fuzzed_data_provider,
      28                 :          0 :         [&] {
      29                 :            :             // Test that MuHash result is consistent independent of order of operations
      30                 :          0 :             muhash.Finalize(out);
      31                 :            : 
      32                 :          0 :             muhash = MuHash3072();
      33                 :          0 :             muhash.Insert(data2);
      34                 :          0 :             muhash.Insert(data);
      35                 :          0 :             muhash.Finalize(out2);
      36                 :          0 :         },
      37                 :          0 :         [&] {
      38                 :            :             // Test that multiplication with the initial state never changes the finalized result
      39                 :          0 :             muhash.Finalize(out);
      40                 :          0 :             MuHash3072 muhash3;
      41                 :          0 :             muhash3 *= muhash;
      42                 :          0 :             muhash3.Finalize(out2);
      43                 :          0 :         },
      44                 :          0 :         [&] {
      45                 :            :             // Test that dividing a MuHash by itself brings it back to it's initial state
      46                 :          0 :             muhash /= muhash;
      47                 :          0 :             muhash.Finalize(out);
      48                 :          0 :             out2 = uint256S(initial_state_hash);
      49                 :          0 :         },
      50                 :          0 :         [&] {
      51                 :            :             // Test that removing all added elements brings the object back to it's initial state
      52                 :          0 :             muhash.Remove(data);
      53                 :          0 :             muhash.Remove(data2);
      54                 :          0 :             muhash.Finalize(out);
      55                 :          0 :             out2 = uint256S(initial_state_hash);
      56                 :          0 :         });
      57 [ #  # ][ #  # ]:          0 :     assert(out == out2);
      58                 :          0 : }

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