wallet-utility: extract addresses and private keys
usage: ./wallet-utility -datadir=<directory> help: ./wallet-utility -h
This commit is contained in:
Chethan Krishna
339
src/wallet-utility.cpp
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339
src/wallet-utility.cpp
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#include <iostream>
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#include <string>
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// Include local headers
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#include "wallet/walletdb.h"
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#include "util.h"
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#include "base58.h"
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#include "wallet/crypter.h"
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#include <boost/foreach.hpp>
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void show_help()
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{
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std::cout <<
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"This program outputs Bitcoin addresses and private keys from a wallet.dat file" << std::endl
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<< std::endl
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<< "Usage and options: "
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<< std::endl
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<< " -datadir=<directory> to tell the program where your wallet is"
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<< std::endl
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<< " -wallet=<name> (Optional) if your wallet is not named wallet.dat"
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<< std::endl
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<< " -regtest or -testnet (Optional) dumps addresses from regtest/testnet"
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<< std::endl
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<< " -dumppass (Optional)if you want to extract private keys associated with addresses"
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<< std::endl
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<< " -pass=<walletpassphrase> if you have encrypted private keys stored in your wallet"
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<< std::endl;
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}
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class WalletUtilityDB : public CDB
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{
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private:
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typedef std::map<unsigned int, CMasterKey> MasterKeyMap;
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MasterKeyMap mapMasterKeys;
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unsigned int nMasterKeyMaxID;
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SecureString mPass;
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std::vector<CKeyingMaterial> vMKeys;
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public:
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WalletUtilityDB(const std::string& strFilename, const char* pszMode = "r+", bool fFlushOnClose = true) : CDB(strFilename, pszMode, fFlushOnClose)
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{
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nMasterKeyMaxID = 0;
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mPass.reserve(100);
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}
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std::string getAddress(CDataStream ssKey);
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std::string getKey(CDataStream ssKey, CDataStream ssValue);
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std::string getCryptedKey(CDataStream ssKey, CDataStream ssValue, std::string masterPass);
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bool updateMasterKeys(CDataStream ssKey, CDataStream ssValue);
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bool parseKeys(bool dumppriv, std::string masterPass);
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bool DecryptSecret(const std::vector<unsigned char>& vchCiphertext, const uint256& nIV, CKeyingMaterial& vchPlaintext);
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bool Unlock();
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bool DecryptKey(const std::vector<unsigned char>& vchCryptedSecret, const CPubKey& vchPubKey, CKey& key);
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};
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/*
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* Address from a public key in base58
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*/
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std::string WalletUtilityDB::getAddress(CDataStream ssKey)
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{
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CPubKey vchPubKey;
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ssKey >> vchPubKey;
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CKeyID id = vchPubKey.GetID();
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std::string strAddr = CBitcoinAddress(id).ToString();
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return strAddr;
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}
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/*
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* Non encrypted private key in WIF
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*/
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std::string WalletUtilityDB::getKey(CDataStream ssKey, CDataStream ssValue)
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{
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std::string strKey;
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CPubKey vchPubKey;
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ssKey >> vchPubKey;
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CPrivKey pkey;
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CKey key;
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ssValue >> pkey;
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if (key.Load(pkey, vchPubKey, true))
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strKey = CBitcoinSecret(key).ToString();
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return strKey;
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}
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bool WalletUtilityDB::DecryptSecret(const std::vector<unsigned char>& vchCiphertext, const uint256& nIV, CKeyingMaterial& vchPlaintext)
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{
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CCrypter cKeyCrypter;
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std::vector<unsigned char> chIV(WALLET_CRYPTO_KEY_SIZE);
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memcpy(&chIV[0], &nIV, WALLET_CRYPTO_KEY_SIZE);
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BOOST_FOREACH(const CKeyingMaterial vMKey, vMKeys)
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{
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if(!cKeyCrypter.SetKey(vMKey, chIV))
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continue;
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if (cKeyCrypter.Decrypt(vchCiphertext, *((CKeyingMaterial*)&vchPlaintext)))
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return true;
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}
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return false;
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}
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bool WalletUtilityDB::Unlock()
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{
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CCrypter crypter;
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CKeyingMaterial vMasterKey;
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BOOST_FOREACH(const MasterKeyMap::value_type& pMasterKey, mapMasterKeys)
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{
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if(!crypter.SetKeyFromPassphrase(mPass, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
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return false;
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if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
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continue; // try another master key
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vMKeys.push_back(vMasterKey);
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}
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return true;
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}
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bool WalletUtilityDB::DecryptKey(const std::vector<unsigned char>& vchCryptedSecret, const CPubKey& vchPubKey, CKey& key)
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{
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CKeyingMaterial vchSecret;
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if(!DecryptSecret(vchCryptedSecret, vchPubKey.GetHash(), vchSecret))
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return false;
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if (vchSecret.size() != 32)
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return false;
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key.Set(vchSecret.begin(), vchSecret.end(), vchPubKey.IsCompressed());
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return true;
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}
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/*
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* Encrypted private key in WIF format
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*/
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std::string WalletUtilityDB::getCryptedKey(CDataStream ssKey, CDataStream ssValue, std::string masterPass)
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{
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mPass = masterPass.c_str();
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CPubKey vchPubKey;
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ssKey >> vchPubKey;
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CKey key;
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std::vector<unsigned char> vKey;
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ssValue >> vKey;
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if (!Unlock())
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return "";
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if(!DecryptKey(vKey, vchPubKey, key))
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return "";
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std::string strKey = CBitcoinSecret(key).ToString();
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return strKey;
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}
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/*
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* Master key derivation
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*/
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bool WalletUtilityDB::updateMasterKeys(CDataStream ssKey, CDataStream ssValue)
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{
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unsigned int nID;
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ssKey >> nID;
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CMasterKey kMasterKey;
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ssValue >> kMasterKey;
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if (mapMasterKeys.count(nID) != 0)
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{
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std::cout << "Error reading wallet database: duplicate CMasterKey id " << nID << std::endl;
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return false;
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}
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mapMasterKeys[nID] = kMasterKey;
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if (nMasterKeyMaxID < nID)
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nMasterKeyMaxID = nID;
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return true;
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}
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/*
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* Look at all the records and parse keys for addresses and private keys
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*/
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bool WalletUtilityDB::parseKeys(bool dumppriv, std::string masterPass)
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{
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DBErrors result = DB_LOAD_OK;
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std::string strType;
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bool first = true;
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try {
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Dbc* pcursor = GetCursor();
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if (!pcursor)
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{
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LogPrintf("Error getting wallet database cursor\n");
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result = DB_CORRUPT;
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}
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if (dumppriv)
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{
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while (result == DB_LOAD_OK && true)
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{
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CDataStream ssKey(SER_DISK, CLIENT_VERSION);
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CDataStream ssValue(SER_DISK, CLIENT_VERSION);
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int result = ReadAtCursor(pcursor, ssKey, ssValue);
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if (result == DB_NOTFOUND) {
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break;
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}
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else if (result != 0)
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{
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LogPrintf("Error reading next record from wallet database\n");
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result = DB_CORRUPT;
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break;
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}
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ssKey >> strType;
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if (strType == "mkey")
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{
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updateMasterKeys(ssKey, ssValue);
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}
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}
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pcursor->close();
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pcursor = GetCursor();
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}
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while (result == DB_LOAD_OK && true)
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{
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CDataStream ssKey(SER_DISK, CLIENT_VERSION);
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CDataStream ssValue(SER_DISK, CLIENT_VERSION);
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int ret = ReadAtCursor(pcursor, ssKey, ssValue);
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if (ret == DB_NOTFOUND)
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{
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std::cout << " ]" << std::endl;
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first = true;
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break;
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}
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else if (ret != DB_LOAD_OK)
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{
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LogPrintf("Error reading next record from wallet database\n");
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result = DB_CORRUPT;
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break;
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}
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ssKey >> strType;
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if (strType == "key" || strType == "ckey")
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{
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std::string strAddr = getAddress(ssKey);
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std::string strKey = "";
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if (dumppriv && strType == "key")
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strKey = getKey(ssKey, ssValue);
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if (dumppriv && strType == "ckey")
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{
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if (masterPass == "")
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{
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std::cout << "Encrypted wallet, please provide a password. See help below" << std::endl;
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show_help();
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result = DB_LOAD_FAIL;
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break;
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}
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strKey = getCryptedKey(ssKey, ssValue, masterPass);
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}
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if (strAddr != "")
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{
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if (first)
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std::cout << "[ ";
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else
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std::cout << ", ";
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}
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if (dumppriv)
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{
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std::cout << "{\"addr\" : \"" + strAddr + "\", "
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<< "\"pkey\" : \"" + strKey + "\"}"
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<< std::flush;
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}
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else
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{
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std::cout << "\"" + strAddr + "\"";
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}
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first = false;
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}
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}
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pcursor->close();
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} catch (DbException &e) {
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std::cout << "DBException caught " << e.get_errno() << std::endl;
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} catch (std::exception &e) {
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std::cout << "Exception caught " << std::endl;
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}
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if (result == DB_LOAD_OK)
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return true;
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else
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return false;
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}
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int main(int argc, char* argv[])
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{
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ParseParameters(argc, argv);
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std::string walletFile = GetArg("-wallet", "wallet.dat");
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std::string masterPass = GetArg("-pass", "");
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bool fDumpPass = GetBoolArg("-dumppass", false);
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bool help = GetBoolArg("-h", false);
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bool result = false;
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if (help)
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{
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show_help();
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return 0;
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}
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try {
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SelectParams(ChainNameFromCommandLine());
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result = WalletUtilityDB(walletFile, "r").parseKeys(fDumpPass, masterPass);
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}
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catch (const std::exception& e) {
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std::cout << "Error opening wallet file " << walletFile << std::endl;
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std::cout << e.what() << std::endl;
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}
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if (result)
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return 0;
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else
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return -1;
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}
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