LCOV - code coverage report
Current view: top level - src/test/fuzz - script_flags.cpp (source / functions) Coverage Total Hit
Test: test_bitcoin_coverage.info Lines: 0.0 % 39 0
Test Date: 2024-08-28 04:44:32 Functions: 0.0 % 2 0
Branches: 0.0 % 56 0

             Branch data     Line data    Source code
       1                 :             : // Copyright (c) 2009-2021 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 <consensus/amount.h>
       6                 :             : #include <primitives/transaction.h>
       7                 :             : #include <script/interpreter.h>
       8                 :             : #include <serialize.h>
       9                 :             : #include <streams.h>
      10                 :             : #include <test/fuzz/fuzz.h>
      11                 :             : #include <test/util/script.h>
      12                 :             : 
      13                 :             : #include <cassert>
      14                 :             : #include <ios>
      15                 :             : #include <utility>
      16                 :             : #include <vector>
      17                 :             : 
      18         [ #  # ]:           0 : FUZZ_TARGET(script_flags)
      19                 :             : {
      20         [ #  # ]:           0 :     if (buffer.size() > 100'000) return;
      21                 :           0 :     DataStream ds{buffer};
      22                 :           0 :     try {
      23         [ #  # ]:           0 :         const CTransaction tx(deserialize, TX_WITH_WITNESS, ds);
      24                 :             : 
      25                 :           0 :         unsigned int verify_flags;
      26         [ #  # ]:           0 :         ds >> verify_flags;
      27                 :             : 
      28   [ #  #  #  # ]:           0 :         if (!IsValidFlagCombination(verify_flags)) return;
      29                 :             : 
      30                 :           0 :         unsigned int fuzzed_flags;
      31         [ #  # ]:           0 :         ds >> fuzzed_flags;
      32                 :             : 
      33                 :           0 :         std::vector<CTxOut> spent_outputs;
      34         [ #  # ]:           0 :         for (unsigned i = 0; i < tx.vin.size(); ++i) {
      35                 :           0 :             CTxOut prevout;
      36         [ #  # ]:           0 :             ds >> prevout;
      37         [ #  # ]:           0 :             if (!MoneyRange(prevout.nValue)) {
      38                 :             :                 // prevouts should be consensus-valid
      39                 :           0 :                 prevout.nValue = 1;
      40                 :             :             }
      41         [ #  # ]:           0 :             spent_outputs.push_back(prevout);
      42                 :           0 :         }
      43                 :           0 :         PrecomputedTransactionData txdata;
      44         [ #  # ]:           0 :         txdata.Init(tx, std::move(spent_outputs));
      45                 :             : 
      46         [ #  # ]:           0 :         for (unsigned i = 0; i < tx.vin.size(); ++i) {
      47         [ #  # ]:           0 :             const CTxOut& prevout = txdata.m_spent_outputs.at(i);
      48         [ #  # ]:           0 :             const TransactionSignatureChecker checker{&tx, i, prevout.nValue, txdata, MissingDataBehavior::ASSERT_FAIL};
      49                 :             : 
      50                 :           0 :             ScriptError serror;
      51   [ #  #  #  #  :           0 :             const bool ret = VerifyScript(tx.vin.at(i).scriptSig, prevout.scriptPubKey, &tx.vin.at(i).scriptWitness, verify_flags, checker, &serror);
                   #  # ]
      52         [ #  # ]:           0 :             assert(ret == (serror == SCRIPT_ERR_OK));
      53                 :             : 
      54                 :             :             // Verify that removing flags from a passing test or adding flags to a failing test does not change the result
      55         [ #  # ]:           0 :             if (ret) {
      56                 :           0 :                 verify_flags &= ~fuzzed_flags;
      57                 :             :             } else {
      58                 :           0 :                 verify_flags |= fuzzed_flags;
      59                 :             :             }
      60   [ #  #  #  # ]:           0 :             if (!IsValidFlagCombination(verify_flags)) return;
      61                 :             : 
      62                 :           0 :             ScriptError serror_fuzzed;
      63   [ #  #  #  #  :           0 :             const bool ret_fuzzed = VerifyScript(tx.vin.at(i).scriptSig, prevout.scriptPubKey, &tx.vin.at(i).scriptWitness, verify_flags, checker, &serror_fuzzed);
                   #  # ]
      64         [ #  # ]:           0 :             assert(ret_fuzzed == (serror_fuzzed == SCRIPT_ERR_OK));
      65                 :             : 
      66         [ #  # ]:           0 :             assert(ret_fuzzed == ret);
      67                 :           0 :         }
      68         [ #  # ]:           0 :     } catch (const std::ios_base::failure&) {
      69                 :           0 :         return;
      70                 :           0 :     }
      71                 :           0 : }
        

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