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       1                 :            : // Copyright (c) 2019-2022 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 <test/fuzz/FuzzedDataProvider.h>
       6                 :            : #include <test/fuzz/fuzz.h>
       7                 :            : 
       8                 :            : #include <node/psbt.h>
       9                 :            : #include <psbt.h>
      10                 :            : #include <pubkey.h>
      11                 :            : #include <script/script.h>
      12                 :            : #include <streams.h>
      13                 :            : #include <util/check.h>
      14                 :            : #include <version.h>
      15                 :            : 
      16                 :            : #include <cstdint>
      17         [ +  - ]:          2 : #include <optional>
      18         [ +  - ]:          2 : #include <string>
      19                 :            : #include <vector>
      20                 :            : 
      21                 :            : using node::AnalyzePSBT;
      22                 :            : using node::PSBTAnalysis;
      23                 :            : using node::PSBTInputAnalysis;
      24                 :            : 
      25   [ +  -  -  + ]:          4 : FUZZ_TARGET(psbt)
      26                 :            : {
      27                 :          2 :     FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
      28                 :          0 :     PartiallySignedTransaction psbt_mut;
      29                 :          0 :     std::string error;
      30         [ #  # ]:          0 :     auto str = fuzzed_data_provider.ConsumeRandomLengthString();
      31   [ #  #  #  # ]:          0 :     if (!DecodeRawPSBT(psbt_mut, MakeByteSpan(str), error)) {
      32                 :          0 :         return;
      33                 :            :     }
      34         [ #  # ]:          0 :     const PartiallySignedTransaction psbt = psbt_mut;
      35                 :            : 
      36   [ #  #  #  # ]:          0 :     const PSBTAnalysis analysis = AnalyzePSBT(psbt);
      37         [ #  # ]:          0 :     (void)PSBTRoleName(analysis.next);
      38         [ #  # ]:          0 :     for (const PSBTInputAnalysis& input_analysis : analysis.inputs) {
      39         [ #  # ]:          0 :         (void)PSBTRoleName(input_analysis.next);
      40                 :            :     }
      41                 :            : 
      42         [ #  # ]:          0 :     (void)psbt.IsNull();
      43                 :            : 
      44         [ #  # ]:          0 :     std::optional<CMutableTransaction> tx = psbt.tx;
      45         [ #  # ]:          0 :     if (tx) {
      46         [ #  # ]:          0 :         const CMutableTransaction& mtx = *tx;
      47         [ #  # ]:          0 :         const PartiallySignedTransaction psbt_from_tx{mtx};
      48                 :          0 :     }
      49                 :            : 
      50         [ #  # ]:          0 :     for (const PSBTInput& input : psbt.inputs) {
      51         [ #  # ]:          0 :         (void)PSBTInputSigned(input);
      52         [ #  # ]:          0 :         (void)input.IsNull();
      53                 :            :     }
      54         [ #  # ]:          0 :     (void)CountPSBTUnsignedInputs(psbt);
      55                 :            : 
      56         [ #  # ]:          0 :     for (const PSBTOutput& output : psbt.outputs) {
      57         [ #  # ]:          0 :         (void)output.IsNull();
      58                 :            :     }
      59                 :            : 
      60   [ #  #  #  # ]:          0 :     for (size_t i = 0; i < psbt.tx->vin.size(); ++i) {
      61         [ #  # ]:          0 :         CTxOut tx_out;
      62   [ #  #  #  # ]:          0 :         if (psbt.GetInputUTXO(tx_out, i)) {
      63         [ #  # ]:          0 :             (void)tx_out.IsNull();
      64         [ #  # ]:          0 :             (void)tx_out.ToString();
      65                 :          0 :         }
      66                 :          0 :     }
      67                 :            : 
      68         [ #  # ]:          0 :     psbt_mut = psbt;
      69         [ #  # ]:          0 :     (void)FinalizePSBT(psbt_mut);
      70                 :            : 
      71         [ #  # ]:          0 :     psbt_mut = psbt;
      72         [ #  # ]:          0 :     CMutableTransaction result;
      73   [ #  #  #  # ]:          0 :     if (FinalizeAndExtractPSBT(psbt_mut, result)) {
      74         [ #  # ]:          0 :         const PartiallySignedTransaction psbt_from_tx{result};
      75                 :          0 :     }
      76                 :            : 
      77         [ #  # ]:          0 :     PartiallySignedTransaction psbt_merge;
      78         [ #  # ]:          0 :     str = fuzzed_data_provider.ConsumeRandomLengthString();
      79   [ #  #  #  # ]:          0 :     if (!DecodeRawPSBT(psbt_merge, MakeByteSpan(str), error)) {
      80         [ #  # ]:          0 :         psbt_merge = psbt;
      81                 :          0 :     }
      82         [ #  # ]:          0 :     psbt_mut = psbt;
      83         [ #  # ]:          0 :     (void)psbt_mut.Merge(psbt_merge);
      84         [ #  # ]:          0 :     psbt_mut = psbt;
      85   [ #  #  #  #  :          0 :     (void)CombinePSBTs(psbt_mut, {psbt_mut, psbt_merge});
             #  #  #  # ]
      86         [ #  # ]:          0 :     psbt_mut = psbt;
      87   [ #  #  #  # ]:          0 :     for (unsigned int i = 0; i < psbt_merge.tx->vin.size(); ++i) {
      88   [ #  #  #  # ]:          0 :         (void)psbt_mut.AddInput(psbt_merge.tx->vin[i], psbt_merge.inputs[i]);
      89                 :          0 :     }
      90   [ #  #  #  # ]:          0 :     for (unsigned int i = 0; i < psbt_merge.tx->vout.size(); ++i) {
      91   [ #  #  #  #  :          0 :         Assert(psbt_mut.AddOutput(psbt_merge.tx->vout[i], psbt_merge.outputs[i]));
                   #  # ]
      92                 :          0 :     }
      93         [ #  # ]:          0 :     psbt_mut.unknown.insert(psbt_merge.unknown.begin(), psbt_merge.unknown.end());
      94         [ #  # ]:          0 : }