1  // Copyright (c) 2023-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 <test/fuzz/FuzzedDataProvider.h>
 6  #include <test/fuzz/fuzz.h>
 7  #include <test/fuzz/util.h>
 8  #include <test/util/setup_common.h>
 9  #include <util/fs.h>
10  #include <util/time.h>
11  #include <util/translation.h>
12  #include <wallet/db.h>
13  #include <wallet/dump.h>
14  #include <wallet/migrate.h>
15  
16  #include <fstream>
17  #include <iostream>
18  
19  using wallet::DatabaseOptions;
20  using wallet::DatabaseStatus;
21  
22  namespace {
23  TestingSetup* g_setup;
24  } // namespace
25  
26  void initialize_wallet_bdb_parser()
27  {
28      static auto testing_setup = MakeNoLogFileContext<TestingSetup>();
29      g_setup = testing_setup.get();
30  }
31  
32  FUZZ_TARGET(wallet_bdb_parser, .init = initialize_wallet_bdb_parser)
33  {
34      const auto wallet_path = g_setup->m_args.GetDataDirNet() / "fuzzed_wallet.dat";
35  
36      {
37          AutoFile outfile{fsbridge::fopen(wallet_path, "wb")};
38          outfile << std::span{buffer};
39          assert(outfile.fclose() == 0);
40      }
41  
42      const DatabaseOptions options{};
43      DatabaseStatus status;
44      bilingual_str error;
45  
46      fs::path bdb_ro_dumpfile{g_setup->m_args.GetDataDirNet() / "fuzzed_dumpfile_bdb_ro.dump"};
47      if (fs::exists(bdb_ro_dumpfile)) { // Writing into an existing dump file will throw an exception
48          remove(bdb_ro_dumpfile);
49      }
50      g_setup->m_args.ForceSetArg("-dumpfile", fs::PathToString(bdb_ro_dumpfile));
51  
52      auto db{MakeBerkeleyRODatabase(wallet_path, options, status, error)};
53      if (db) {
54          assert(DumpWallet(g_setup->m_args, *db, error));
55      } else {
56          if (error.original.starts_with("AutoFile::ignore: end of file") ||
57              error.original.starts_with("AutoFile::read: end of file") ||
58              error.original.starts_with("AutoFile::seek: ") ||
59              error.original == "Not a BDB file" ||
60              error.original == "Unexpected page type, should be 9 (BTree Metadata)" ||
61              error.original == "Unexpected database flags, should only be 0x20 (subdatabases)" ||
62              error.original == "Unexpected outer database root page type" ||
63              error.original == "Unexpected number of entries in outer database root page" ||
64              error.original == "Subdatabase page number has unexpected length" ||
65              error.original == "Unknown record type in records page" ||
66              error.original == "Unknown record type in internal page" ||
67              error.original == "Unexpected page size" ||
68              error.original == "Unexpected page type" ||
69              error.original == "Page number mismatch" ||
70              error.original == "Bad btree level" ||
71              error.original == "Bad page size" ||
72              error.original == "Meta page number mismatch" ||
73              error.original == "Data record position not in page" ||
74              error.original == "Internal record position not in page" ||
75              error.original == "LSNs are not reset, this database is not completely flushed. Please reopen then close the database with a version that has BDB support" ||
76              error.original == "Records page has odd number of records" ||
77              error.original == "Bad overflow record page type") {
78              // Do nothing
79          } else if (error.original == "Subdatabase last page is greater than database last page" ||
80                     error.original == "Page number is greater than database last page" ||
81                     error.original == "Last page number could not fit in file" ||
82                     error.original == "Subdatabase has an unexpected name" ||
83                     error.original == "Unsupported BDB data file version number" ||
84                     error.original == "BDB builtin encryption is not supported") {
85          } else {
86              throw std::runtime_error(error.original);
87          }
88      }
89  }