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wallet: Remove wallettool salvage
Salvage is bdb only which is about to be removed.
This commit is contained in:
Ava Chow
parent
7a41c939f0
commit
56f959d829
5 changed files with 1 additions and 261 deletions
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@ -45,7 +45,6 @@ static void SetupWalletToolArgs(ArgsManager& argsman)
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argsman.AddCommand("info", "Get wallet info");
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argsman.AddCommand("create", "Create new wallet file");
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argsman.AddCommand("salvage", "Attempt to recover private keys from a corrupt wallet. Warning: 'salvage' is experimental.");
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argsman.AddCommand("dump", "Print out all of the wallet key-value records");
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argsman.AddCommand("createfromdump", "Create new wallet file from dumped records");
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}
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@ -46,6 +46,6 @@ target_link_libraries(bitcoin_wallet
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)
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if(USE_BDB)
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target_sources(bitcoin_wallet PRIVATE bdb.cpp salvage.cpp)
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target_sources(bitcoin_wallet PRIVATE bdb.cpp)
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target_link_libraries(bitcoin_wallet PUBLIC BerkeleyDB::BerkeleyDB)
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endif()
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@ -1,221 +0,0 @@
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// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-present The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <streams.h>
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#include <util/fs.h>
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#include <util/translation.h>
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#include <wallet/bdb.h>
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#include <wallet/salvage.h>
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#include <wallet/wallet.h>
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#include <wallet/walletdb.h>
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#include <db_cxx.h>
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namespace wallet {
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/* End of headers, beginning of key/value data */
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static const char *HEADER_END = "HEADER=END";
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/* End of key/value data */
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static const char *DATA_END = "DATA=END";
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typedef std::pair<std::vector<unsigned char>, std::vector<unsigned char> > KeyValPair;
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class DummyCursor : public DatabaseCursor
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{
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Status Next(DataStream& key, DataStream& value) override { return Status::FAIL; }
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};
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/** RAII class that provides access to a DummyDatabase. Never fails. */
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class DummyBatch : public DatabaseBatch
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{
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private:
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bool ReadKey(DataStream&& key, DataStream& value) override { return true; }
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bool WriteKey(DataStream&& key, DataStream&& value, bool overwrite=true) override { return true; }
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bool EraseKey(DataStream&& key) override { return true; }
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bool HasKey(DataStream&& key) override { return true; }
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bool ErasePrefix(std::span<const std::byte> prefix) override { return true; }
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public:
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void Flush() override {}
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void Close() override {}
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std::unique_ptr<DatabaseCursor> GetNewCursor() override { return std::make_unique<DummyCursor>(); }
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std::unique_ptr<DatabaseCursor> GetNewPrefixCursor(std::span<const std::byte> prefix) override { return GetNewCursor(); }
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bool TxnBegin() override { return true; }
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bool TxnCommit() override { return true; }
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bool TxnAbort() override { return true; }
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bool HasActiveTxn() override { return false; }
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};
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/** A dummy WalletDatabase that does nothing and never fails. Only used by salvage.
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**/
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class DummyDatabase : public WalletDatabase
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{
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public:
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void Open() override {};
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void AddRef() override {}
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void RemoveRef() override {}
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bool Rewrite(const char* pszSkip=nullptr) override { return true; }
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bool Backup(const std::string& strDest) const override { return true; }
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void Close() override {}
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void Flush() override {}
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bool PeriodicFlush() override { return true; }
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void IncrementUpdateCounter() override { ++nUpdateCounter; }
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void ReloadDbEnv() override {}
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std::string Filename() override { return "dummy"; }
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std::string Format() override { return "dummy"; }
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std::unique_ptr<DatabaseBatch> MakeBatch(bool flush_on_close = true) override { return std::make_unique<DummyBatch>(); }
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};
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bool RecoverDatabaseFile(const ArgsManager& args, const fs::path& file_path, bilingual_str& error, std::vector<bilingual_str>& warnings)
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{
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DatabaseOptions options;
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DatabaseStatus status;
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ReadDatabaseArgs(args, options);
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options.require_existing = true;
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options.verify = false;
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options.require_format = DatabaseFormat::BERKELEY;
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std::unique_ptr<WalletDatabase> database = MakeDatabase(file_path, options, status, error);
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if (!database) return false;
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BerkeleyDatabase& berkeley_database = static_cast<BerkeleyDatabase&>(*database);
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std::string filename = berkeley_database.Filename();
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std::shared_ptr<BerkeleyEnvironment> env = berkeley_database.env;
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if (!env->Open(error)) {
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return false;
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}
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// Recovery procedure:
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// move wallet file to walletfilename.timestamp.bak
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// Call Salvage with fAggressive=true to
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// get as much data as possible.
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// Rewrite salvaged data to fresh wallet file
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// Rescan so any missing transactions will be
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// found.
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int64_t now = GetTime();
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std::string newFilename = strprintf("%s.%d.bak", filename, now);
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int result = env->dbenv->dbrename(nullptr, filename.c_str(), nullptr,
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newFilename.c_str(), DB_AUTO_COMMIT);
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if (result != 0)
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{
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error = Untranslated(strprintf("Failed to rename %s to %s", filename, newFilename));
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return false;
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}
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/**
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* Salvage data from a file. The DB_AGGRESSIVE flag is being used (see berkeley DB->verify() method documentation).
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* key/value pairs are appended to salvagedData which are then written out to a new wallet file.
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* NOTE: reads the entire database into memory, so cannot be used
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* for huge databases.
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*/
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std::vector<KeyValPair> salvagedData;
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std::stringstream strDump;
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Db db(env->dbenv.get(), 0);
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result = db.verify(newFilename.c_str(), nullptr, &strDump, DB_SALVAGE | DB_AGGRESSIVE);
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if (result == DB_VERIFY_BAD) {
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warnings.emplace_back(Untranslated("Salvage: Database salvage found errors, all data may not be recoverable."));
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}
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if (result != 0 && result != DB_VERIFY_BAD) {
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error = Untranslated(strprintf("Salvage: Database salvage failed with result %d.", result));
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return false;
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}
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// Format of bdb dump is ascii lines:
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// header lines...
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// HEADER=END
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// hexadecimal key
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// hexadecimal value
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// ... repeated
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// DATA=END
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std::string strLine;
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while (!strDump.eof() && strLine != HEADER_END)
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getline(strDump, strLine); // Skip past header
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std::string keyHex, valueHex;
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while (!strDump.eof() && keyHex != DATA_END) {
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getline(strDump, keyHex);
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if (keyHex != DATA_END) {
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if (strDump.eof())
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break;
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getline(strDump, valueHex);
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if (valueHex == DATA_END) {
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warnings.emplace_back(Untranslated("Salvage: WARNING: Number of keys in data does not match number of values."));
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break;
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}
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salvagedData.emplace_back(ParseHex(keyHex), ParseHex(valueHex));
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}
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}
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bool fSuccess;
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if (keyHex != DATA_END) {
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warnings.emplace_back(Untranslated("Salvage: WARNING: Unexpected end of file while reading salvage output."));
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fSuccess = false;
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} else {
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fSuccess = (result == 0);
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}
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if (salvagedData.empty())
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{
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error = Untranslated(strprintf("Salvage(aggressive) found no records in %s.", newFilename));
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return false;
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}
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std::unique_ptr<Db> pdbCopy = std::make_unique<Db>(env->dbenv.get(), 0);
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int ret = pdbCopy->open(nullptr, // Txn pointer
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filename.c_str(), // Filename
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"main", // Logical db name
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DB_BTREE, // Database type
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DB_CREATE, // Flags
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0);
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if (ret > 0) {
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error = Untranslated(strprintf("Cannot create database file %s", filename));
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pdbCopy->close(0);
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return false;
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}
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DbTxn* ptxn = env->TxnBegin(DB_TXN_WRITE_NOSYNC);
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CWallet dummyWallet(nullptr, "", std::make_unique<DummyDatabase>());
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for (KeyValPair& row : salvagedData)
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{
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/* Filter for only private key type KV pairs to be added to the salvaged wallet */
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DataStream ssKey{row.first};
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DataStream ssValue(row.second);
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std::string strType, strErr;
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// We only care about KEY, MASTER_KEY, CRYPTED_KEY, and HDCHAIN types
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ssKey >> strType;
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bool fReadOK = false;
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if (strType == DBKeys::KEY) {
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fReadOK = LoadKey(&dummyWallet, ssKey, ssValue, strErr);
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} else if (strType == DBKeys::CRYPTED_KEY) {
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fReadOK = LoadCryptedKey(&dummyWallet, ssKey, ssValue, strErr);
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} else if (strType == DBKeys::MASTER_KEY) {
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fReadOK = LoadEncryptionKey(&dummyWallet, ssKey, ssValue, strErr);
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} else if (strType == DBKeys::HDCHAIN) {
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fReadOK = LoadHDChain(&dummyWallet, ssValue, strErr);
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} else {
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continue;
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}
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if (!fReadOK)
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{
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warnings.push_back(Untranslated(strprintf("WARNING: WalletBatch::Recover skipping %s: %s", strType, strErr)));
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continue;
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}
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Dbt datKey(row.first.data(), row.first.size());
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Dbt datValue(row.second.data(), row.second.size());
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int ret2 = pdbCopy->put(ptxn, &datKey, &datValue, DB_NOOVERWRITE);
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if (ret2 > 0)
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fSuccess = false;
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}
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ptxn->commit(0);
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pdbCopy->close(0);
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return fSuccess;
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}
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} // namespace wallet
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@ -1,19 +0,0 @@
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// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2021 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_WALLET_SALVAGE_H
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#define BITCOIN_WALLET_SALVAGE_H
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#include <streams.h>
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#include <util/fs.h>
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class ArgsManager;
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struct bilingual_str;
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namespace wallet {
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bool RecoverDatabaseFile(const ArgsManager& args, const fs::path& file_path, bilingual_str& error, std::vector<bilingual_str>& warnings);
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} // namespace wallet
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#endif // BITCOIN_WALLET_SALVAGE_H
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@ -10,7 +10,6 @@
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#include <util/fs.h>
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#include <util/translation.h>
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#include <wallet/dump.h>
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#include <wallet/salvage.h>
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#include <wallet/wallet.h>
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#include <wallet/walletutil.h>
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@ -165,24 +164,6 @@ bool ExecuteWalletToolFunc(const ArgsManager& args, const std::string& command)
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if (!wallet_instance) return false;
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WalletShowInfo(wallet_instance.get());
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wallet_instance->Close();
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} else if (command == "salvage") {
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#ifdef USE_BDB
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bilingual_str error;
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std::vector<bilingual_str> warnings;
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bool ret = RecoverDatabaseFile(args, path, error, warnings);
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if (!ret) {
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for (const auto& warning : warnings) {
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tfm::format(std::cerr, "%s\n", warning.original);
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}
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if (!error.empty()) {
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tfm::format(std::cerr, "%s\n", error.original);
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}
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}
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return ret;
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#else
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tfm::format(std::cerr, "Salvage command is not available as BDB support is not compiled");
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return false;
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#endif
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} else if (command == "dump") {
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DatabaseOptions options;
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ReadDatabaseArgs(args, options);
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