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bitcoin/src/wallet/walletdb.cpp
fanquake 68f0ab26bc
Merge #19805: wallet: Avoid deserializing unused records when salvaging 
0bbe26a1af wallet: filter for keys only before record deser in salvage (Andrew Chow)
544e12a4e8 walletdb: Add KeyFilterFn to ReadKeyValue (Andrew Chow)

Pull request description:

  When salvaging a wallet, the only things that matter are the private keys. It is not necessary to attempt to deserialize any other records, especially if those records are corrupted too.

  This PR adds a `KeyFilterFn` function callback to `ReadKeyValue` that salvage uses to filter for only the records that it wants. Of course doing it this way also lets us do other filters in the future from other places should we so desire.

ACKs for top commit:
  ryanofsky:
    Code review ACK 0bbe26a1af. Looks great! This should make the recovery code more robust. Normally it'd be good to have a test case for the problem this fixes, but Marco already wrote one in #19078, so I think we're covered
  laanwj:
    Code review ACK 0bbe26a1af

Tree-SHA512: 8e3ee283a22a79273915711c4fb751f3c9b02ce94e6bf08dc468f1cfdf9fac35c693bbfd2435ce43c3a06c601b9b0a67e209621f6814bedfe3bc7a7ccc37bb01
2020-09-03 12:47:01 +08:00

1018 lines
37 KiB
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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <wallet/walletdb.h>
#include <fs.h>
#include <key_io.h>
#include <protocol.h>
#include <serialize.h>
#include <sync.h>
#include <util/bip32.h>
#include <util/system.h>
#include <util/time.h>
#include <wallet/wallet.h>
#include <atomic>
#include <string>
namespace DBKeys {
const std::string ACENTRY{"acentry"};
const std::string ACTIVEEXTERNALSPK{"activeexternalspk"};
const std::string ACTIVEINTERNALSPK{"activeinternalspk"};
const std::string BESTBLOCK_NOMERKLE{"bestblock_nomerkle"};
const std::string BESTBLOCK{"bestblock"};
const std::string CRYPTED_KEY{"ckey"};
const std::string CSCRIPT{"cscript"};
const std::string DEFAULTKEY{"defaultkey"};
const std::string DESTDATA{"destdata"};
const std::string FLAGS{"flags"};
const std::string HDCHAIN{"hdchain"};
const std::string KEYMETA{"keymeta"};
const std::string KEY{"key"};
const std::string MASTER_KEY{"mkey"};
const std::string MINVERSION{"minversion"};
const std::string NAME{"name"};
const std::string OLD_KEY{"wkey"};
const std::string ORDERPOSNEXT{"orderposnext"};
const std::string POOL{"pool"};
const std::string PURPOSE{"purpose"};
const std::string SETTINGS{"settings"};
const std::string TX{"tx"};
const std::string VERSION{"version"};
const std::string WALLETDESCRIPTOR{"walletdescriptor"};
const std::string WALLETDESCRIPTORCACHE{"walletdescriptorcache"};
const std::string WALLETDESCRIPTORCKEY{"walletdescriptorckey"};
const std::string WALLETDESCRIPTORKEY{"walletdescriptorkey"};
const std::string WATCHMETA{"watchmeta"};
const std::string WATCHS{"watchs"};
} // namespace DBKeys
//
// WalletBatch
//
bool WalletBatch::WriteName(const std::string& strAddress, const std::string& strName)
{
return WriteIC(std::make_pair(DBKeys::NAME, strAddress), strName);
}
bool WalletBatch::EraseName(const std::string& strAddress)
{
// This should only be used for sending addresses, never for receiving addresses,
// receiving addresses must always have an address book entry if they're not change return.
return EraseIC(std::make_pair(DBKeys::NAME, strAddress));
}
bool WalletBatch::WritePurpose(const std::string& strAddress, const std::string& strPurpose)
{
return WriteIC(std::make_pair(DBKeys::PURPOSE, strAddress), strPurpose);
}
bool WalletBatch::ErasePurpose(const std::string& strAddress)
{
return EraseIC(std::make_pair(DBKeys::PURPOSE, strAddress));
}
bool WalletBatch::WriteTx(const CWalletTx& wtx)
{
return WriteIC(std::make_pair(DBKeys::TX, wtx.GetHash()), wtx);
}
bool WalletBatch::EraseTx(uint256 hash)
{
return EraseIC(std::make_pair(DBKeys::TX, hash));
}
bool WalletBatch::WriteKeyMetadata(const CKeyMetadata& meta, const CPubKey& pubkey, const bool overwrite)
{
return WriteIC(std::make_pair(DBKeys::KEYMETA, pubkey), meta, overwrite);
}
bool WalletBatch::WriteKey(const CPubKey& vchPubKey, const CPrivKey& vchPrivKey, const CKeyMetadata& keyMeta)
{
if (!WriteKeyMetadata(keyMeta, vchPubKey, false)) {
return false;
}
// hash pubkey/privkey to accelerate wallet load
std::vector<unsigned char> vchKey;
vchKey.reserve(vchPubKey.size() + vchPrivKey.size());
vchKey.insert(vchKey.end(), vchPubKey.begin(), vchPubKey.end());
vchKey.insert(vchKey.end(), vchPrivKey.begin(), vchPrivKey.end());
return WriteIC(std::make_pair(DBKeys::KEY, vchPubKey), std::make_pair(vchPrivKey, Hash(vchKey)), false);
}
bool WalletBatch::WriteCryptedKey(const CPubKey& vchPubKey,
const std::vector<unsigned char>& vchCryptedSecret,
const CKeyMetadata &keyMeta)
{
if (!WriteKeyMetadata(keyMeta, vchPubKey, true)) {
return false;
}
// Compute a checksum of the encrypted key
uint256 checksum = Hash(vchCryptedSecret);
const auto key = std::make_pair(DBKeys::CRYPTED_KEY, vchPubKey);
if (!WriteIC(key, std::make_pair(vchCryptedSecret, checksum), false)) {
// It may already exist, so try writing just the checksum
std::vector<unsigned char> val;
if (!m_batch->Read(key, val)) {
return false;
}
if (!WriteIC(key, std::make_pair(val, checksum), true)) {
return false;
}
}
EraseIC(std::make_pair(DBKeys::KEY, vchPubKey));
return true;
}
bool WalletBatch::WriteMasterKey(unsigned int nID, const CMasterKey& kMasterKey)
{
return WriteIC(std::make_pair(DBKeys::MASTER_KEY, nID), kMasterKey, true);
}
bool WalletBatch::WriteCScript(const uint160& hash, const CScript& redeemScript)
{
return WriteIC(std::make_pair(DBKeys::CSCRIPT, hash), redeemScript, false);
}
bool WalletBatch::WriteWatchOnly(const CScript &dest, const CKeyMetadata& keyMeta)
{
if (!WriteIC(std::make_pair(DBKeys::WATCHMETA, dest), keyMeta)) {
return false;
}
return WriteIC(std::make_pair(DBKeys::WATCHS, dest), '1');
}
bool WalletBatch::EraseWatchOnly(const CScript &dest)
{
if (!EraseIC(std::make_pair(DBKeys::WATCHMETA, dest))) {
return false;
}
return EraseIC(std::make_pair(DBKeys::WATCHS, dest));
}
bool WalletBatch::WriteBestBlock(const CBlockLocator& locator)
{
WriteIC(DBKeys::BESTBLOCK, CBlockLocator()); // Write empty block locator so versions that require a merkle branch automatically rescan
return WriteIC(DBKeys::BESTBLOCK_NOMERKLE, locator);
}
bool WalletBatch::ReadBestBlock(CBlockLocator& locator)
{
if (m_batch->Read(DBKeys::BESTBLOCK, locator) && !locator.vHave.empty()) return true;
return m_batch->Read(DBKeys::BESTBLOCK_NOMERKLE, locator);
}
bool WalletBatch::WriteOrderPosNext(int64_t nOrderPosNext)
{
return WriteIC(DBKeys::ORDERPOSNEXT, nOrderPosNext);
}
bool WalletBatch::ReadPool(int64_t nPool, CKeyPool& keypool)
{
return m_batch->Read(std::make_pair(DBKeys::POOL, nPool), keypool);
}
bool WalletBatch::WritePool(int64_t nPool, const CKeyPool& keypool)
{
return WriteIC(std::make_pair(DBKeys::POOL, nPool), keypool);
}
bool WalletBatch::ErasePool(int64_t nPool)
{
return EraseIC(std::make_pair(DBKeys::POOL, nPool));
}
bool WalletBatch::WriteMinVersion(int nVersion)
{
return WriteIC(DBKeys::MINVERSION, nVersion);
}
bool WalletBatch::WriteActiveScriptPubKeyMan(uint8_t type, const uint256& id, bool internal)
{
std::string key = internal ? DBKeys::ACTIVEINTERNALSPK : DBKeys::ACTIVEEXTERNALSPK;
return WriteIC(make_pair(key, type), id);
}
bool WalletBatch::WriteDescriptorKey(const uint256& desc_id, const CPubKey& pubkey, const CPrivKey& privkey)
{
// hash pubkey/privkey to accelerate wallet load
std::vector<unsigned char> key;
key.reserve(pubkey.size() + privkey.size());
key.insert(key.end(), pubkey.begin(), pubkey.end());
key.insert(key.end(), privkey.begin(), privkey.end());
return WriteIC(std::make_pair(DBKeys::WALLETDESCRIPTORKEY, std::make_pair(desc_id, pubkey)), std::make_pair(privkey, Hash(key)), false);
}
bool WalletBatch::WriteCryptedDescriptorKey(const uint256& desc_id, const CPubKey& pubkey, const std::vector<unsigned char>& secret)
{
if (!WriteIC(std::make_pair(DBKeys::WALLETDESCRIPTORCKEY, std::make_pair(desc_id, pubkey)), secret, false)) {
return false;
}
EraseIC(std::make_pair(DBKeys::WALLETDESCRIPTORKEY, std::make_pair(desc_id, pubkey)));
return true;
}
bool WalletBatch::WriteDescriptor(const uint256& desc_id, const WalletDescriptor& descriptor)
{
return WriteIC(make_pair(DBKeys::WALLETDESCRIPTOR, desc_id), descriptor);
}
bool WalletBatch::WriteDescriptorDerivedCache(const CExtPubKey& xpub, const uint256& desc_id, uint32_t key_exp_index, uint32_t der_index)
{
std::vector<unsigned char> ser_xpub(BIP32_EXTKEY_SIZE);
xpub.Encode(ser_xpub.data());
return WriteIC(std::make_pair(std::make_pair(DBKeys::WALLETDESCRIPTORCACHE, desc_id), std::make_pair(key_exp_index, der_index)), ser_xpub);
}
bool WalletBatch::WriteDescriptorParentCache(const CExtPubKey& xpub, const uint256& desc_id, uint32_t key_exp_index)
{
std::vector<unsigned char> ser_xpub(BIP32_EXTKEY_SIZE);
xpub.Encode(ser_xpub.data());
return WriteIC(std::make_pair(std::make_pair(DBKeys::WALLETDESCRIPTORCACHE, desc_id), key_exp_index), ser_xpub);
}
class CWalletScanState {
public:
unsigned int nKeys{0};
unsigned int nCKeys{0};
unsigned int nWatchKeys{0};
unsigned int nKeyMeta{0};
unsigned int m_unknown_records{0};
bool fIsEncrypted{false};
bool fAnyUnordered{false};
std::vector<uint256> vWalletUpgrade;
std::map<OutputType, uint256> m_active_external_spks;
std::map<OutputType, uint256> m_active_internal_spks;
std::map<uint256, DescriptorCache> m_descriptor_caches;
std::map<std::pair<uint256, CKeyID>, CKey> m_descriptor_keys;
std::map<std::pair<uint256, CKeyID>, std::pair<CPubKey, std::vector<unsigned char>>> m_descriptor_crypt_keys;
std::map<uint160, CHDChain> m_hd_chains;
CWalletScanState() {
}
};
static bool
ReadKeyValue(CWallet* pwallet, CDataStream& ssKey, CDataStream& ssValue,
CWalletScanState &wss, std::string& strType, std::string& strErr, const KeyFilterFn& filter_fn = nullptr) EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)
{
try {
// Unserialize
// Taking advantage of the fact that pair serialization
// is just the two items serialized one after the other
ssKey >> strType;
// If we have a filter, check if this matches the filter
if (filter_fn && !filter_fn(strType)) {
return true;
}
if (strType == DBKeys::NAME) {
std::string strAddress;
ssKey >> strAddress;
std::string label;
ssValue >> label;
pwallet->m_address_book[DecodeDestination(strAddress)].SetLabel(label);
} else if (strType == DBKeys::PURPOSE) {
std::string strAddress;
ssKey >> strAddress;
ssValue >> pwallet->m_address_book[DecodeDestination(strAddress)].purpose;
} else if (strType == DBKeys::TX) {
uint256 hash;
ssKey >> hash;
// LoadToWallet call below creates a new CWalletTx that fill_wtx
// callback fills with transaction metadata.
auto fill_wtx = [&](CWalletTx& wtx, bool new_tx) {
assert(new_tx);
ssValue >> wtx;
if (wtx.GetHash() != hash)
return false;
// Undo serialize changes in 31600
if (31404 <= wtx.fTimeReceivedIsTxTime && wtx.fTimeReceivedIsTxTime <= 31703)
{
if (!ssValue.empty())
{
char fTmp;
char fUnused;
std::string unused_string;
ssValue >> fTmp >> fUnused >> unused_string;
strErr = strprintf("LoadWallet() upgrading tx ver=%d %d %s",
wtx.fTimeReceivedIsTxTime, fTmp, hash.ToString());
wtx.fTimeReceivedIsTxTime = fTmp;
}
else
{
strErr = strprintf("LoadWallet() repairing tx ver=%d %s", wtx.fTimeReceivedIsTxTime, hash.ToString());
wtx.fTimeReceivedIsTxTime = 0;
}
wss.vWalletUpgrade.push_back(hash);
}
if (wtx.nOrderPos == -1)
wss.fAnyUnordered = true;
return true;
};
if (!pwallet->LoadToWallet(hash, fill_wtx)) {
return false;
}
} else if (strType == DBKeys::WATCHS) {
wss.nWatchKeys++;
CScript script;
ssKey >> script;
char fYes;
ssValue >> fYes;
if (fYes == '1') {
pwallet->GetOrCreateLegacyScriptPubKeyMan()->LoadWatchOnly(script);
}
} else if (strType == DBKeys::KEY) {
CPubKey vchPubKey;
ssKey >> vchPubKey;
if (!vchPubKey.IsValid())
{
strErr = "Error reading wallet database: CPubKey corrupt";
return false;
}
CKey key;
CPrivKey pkey;
uint256 hash;
wss.nKeys++;
ssValue >> pkey;
// Old wallets store keys as DBKeys::KEY [pubkey] => [privkey]
// ... which was slow for wallets with lots of keys, because the public key is re-derived from the private key
// using EC operations as a checksum.
// Newer wallets store keys as DBKeys::KEY [pubkey] => [privkey][hash(pubkey,privkey)], which is much faster while
// remaining backwards-compatible.
try
{
ssValue >> hash;
}
catch (...) {}
bool fSkipCheck = false;
if (!hash.IsNull())
{
// hash pubkey/privkey to accelerate wallet load
std::vector<unsigned char> vchKey;
vchKey.reserve(vchPubKey.size() + pkey.size());
vchKey.insert(vchKey.end(), vchPubKey.begin(), vchPubKey.end());
vchKey.insert(vchKey.end(), pkey.begin(), pkey.end());
if (Hash(vchKey) != hash)
{
strErr = "Error reading wallet database: CPubKey/CPrivKey corrupt";
return false;
}
fSkipCheck = true;
}
if (!key.Load(pkey, vchPubKey, fSkipCheck))
{
strErr = "Error reading wallet database: CPrivKey corrupt";
return false;
}
if (!pwallet->GetOrCreateLegacyScriptPubKeyMan()->LoadKey(key, vchPubKey))
{
strErr = "Error reading wallet database: LegacyScriptPubKeyMan::LoadKey failed";
return false;
}
} else if (strType == DBKeys::MASTER_KEY) {
// Master encryption key is loaded into only the wallet and not any of the ScriptPubKeyMans.
unsigned int nID;
ssKey >> nID;
CMasterKey kMasterKey;
ssValue >> kMasterKey;
if(pwallet->mapMasterKeys.count(nID) != 0)
{
strErr = strprintf("Error reading wallet database: duplicate CMasterKey id %u", nID);
return false;
}
pwallet->mapMasterKeys[nID] = kMasterKey;
if (pwallet->nMasterKeyMaxID < nID)
pwallet->nMasterKeyMaxID = nID;
} else if (strType == DBKeys::CRYPTED_KEY) {
CPubKey vchPubKey;
ssKey >> vchPubKey;
if (!vchPubKey.IsValid())
{
strErr = "Error reading wallet database: CPubKey corrupt";
return false;
}
std::vector<unsigned char> vchPrivKey;
ssValue >> vchPrivKey;
// Get the checksum and check it
bool checksum_valid = false;
if (!ssValue.eof()) {
uint256 checksum;
ssValue >> checksum;
if ((checksum_valid = Hash(vchPrivKey) != checksum)) {
strErr = "Error reading wallet database: Crypted key corrupt";
return false;
}
}
wss.nCKeys++;
if (!pwallet->GetOrCreateLegacyScriptPubKeyMan()->LoadCryptedKey(vchPubKey, vchPrivKey, checksum_valid))
{
strErr = "Error reading wallet database: LegacyScriptPubKeyMan::LoadCryptedKey failed";
return false;
}
wss.fIsEncrypted = true;
} else if (strType == DBKeys::KEYMETA) {
CPubKey vchPubKey;
ssKey >> vchPubKey;
CKeyMetadata keyMeta;
ssValue >> keyMeta;
wss.nKeyMeta++;
pwallet->GetOrCreateLegacyScriptPubKeyMan()->LoadKeyMetadata(vchPubKey.GetID(), keyMeta);
// Extract some CHDChain info from this metadata if it has any
if (keyMeta.nVersion >= CKeyMetadata::VERSION_WITH_HDDATA && !keyMeta.hd_seed_id.IsNull() && keyMeta.hdKeypath.size() > 0) {
// Get the path from the key origin or from the path string
// Not applicable when path is "s" or "m" as those indicate a seed
// See https://github.com/bitcoin/bitcoin/pull/12924
bool internal = false;
uint32_t index = 0;
if (keyMeta.hdKeypath != "s" && keyMeta.hdKeypath != "m") {
std::vector<uint32_t> path;
if (keyMeta.has_key_origin) {
// We have a key origin, so pull it from its path vector
path = keyMeta.key_origin.path;
} else {
// No key origin, have to parse the string
if (!ParseHDKeypath(keyMeta.hdKeypath, path)) {
strErr = "Error reading wallet database: keymeta with invalid HD keypath";
return false;
}
}
// Extract the index and internal from the path
// Path string is m/0'/k'/i'
// Path vector is [0', k', i'] (but as ints OR'd with the hardened bit
// k == 0 for external, 1 for internal. i is the index
if (path.size() != 3) {
strErr = "Error reading wallet database: keymeta found with unexpected path";
return false;
}
if (path[0] != 0x80000000) {
strErr = strprintf("Unexpected path index of 0x%08x (expected 0x80000000) for the element at index 0", path[0]);
return false;
}
if (path[1] != 0x80000000 && path[1] != (1 | 0x80000000)) {
strErr = strprintf("Unexpected path index of 0x%08x (expected 0x80000000 or 0x80000001) for the element at index 1", path[1]);
return false;
}
if ((path[2] & 0x80000000) == 0) {
strErr = strprintf("Unexpected path index of 0x%08x (expected to be greater than or equal to 0x80000000)", path[2]);
return false;
}
internal = path[1] == (1 | 0x80000000);
index = path[2] & ~0x80000000;
}
// Insert a new CHDChain, or get the one that already exists
auto ins = wss.m_hd_chains.emplace(keyMeta.hd_seed_id, CHDChain());
CHDChain& chain = ins.first->second;
if (ins.second) {
// For new chains, we want to default to VERSION_HD_BASE until we see an internal
chain.nVersion = CHDChain::VERSION_HD_BASE;
chain.seed_id = keyMeta.hd_seed_id;
}
if (internal) {
chain.nVersion = CHDChain::VERSION_HD_CHAIN_SPLIT;
chain.nInternalChainCounter = std::max(chain.nInternalChainCounter, index);
} else {
chain.nExternalChainCounter = std::max(chain.nExternalChainCounter, index);
}
}
} else if (strType == DBKeys::WATCHMETA) {
CScript script;
ssKey >> script;
CKeyMetadata keyMeta;
ssValue >> keyMeta;
wss.nKeyMeta++;
pwallet->GetOrCreateLegacyScriptPubKeyMan()->LoadScriptMetadata(CScriptID(script), keyMeta);
} else if (strType == DBKeys::DEFAULTKEY) {
// We don't want or need the default key, but if there is one set,
// we want to make sure that it is valid so that we can detect corruption
CPubKey vchPubKey;
ssValue >> vchPubKey;
if (!vchPubKey.IsValid()) {
strErr = "Error reading wallet database: Default Key corrupt";
return false;
}
} else if (strType == DBKeys::POOL) {
int64_t nIndex;
ssKey >> nIndex;
CKeyPool keypool;
ssValue >> keypool;
pwallet->GetOrCreateLegacyScriptPubKeyMan()->LoadKeyPool(nIndex, keypool);
} else if (strType == DBKeys::CSCRIPT) {
uint160 hash;
ssKey >> hash;
CScript script;
ssValue >> script;
if (!pwallet->GetOrCreateLegacyScriptPubKeyMan()->LoadCScript(script))
{
strErr = "Error reading wallet database: LegacyScriptPubKeyMan::LoadCScript failed";
return false;
}
} else if (strType == DBKeys::ORDERPOSNEXT) {
ssValue >> pwallet->nOrderPosNext;
} else if (strType == DBKeys::DESTDATA) {
std::string strAddress, strKey, strValue;
ssKey >> strAddress;
ssKey >> strKey;
ssValue >> strValue;
pwallet->LoadDestData(DecodeDestination(strAddress), strKey, strValue);
} else if (strType == DBKeys::HDCHAIN) {
CHDChain chain;
ssValue >> chain;
pwallet->GetOrCreateLegacyScriptPubKeyMan()->LoadHDChain(chain);
} else if (strType == DBKeys::FLAGS) {
uint64_t flags;
ssValue >> flags;
if (!pwallet->LoadWalletFlags(flags)) {
strErr = "Error reading wallet database: Unknown non-tolerable wallet flags found";
return false;
}
} else if (strType == DBKeys::OLD_KEY) {
strErr = "Found unsupported 'wkey' record, try loading with version 0.18";
return false;
} else if (strType == DBKeys::ACTIVEEXTERNALSPK || strType == DBKeys::ACTIVEINTERNALSPK) {
uint8_t type;
ssKey >> type;
uint256 id;
ssValue >> id;
bool internal = strType == DBKeys::ACTIVEINTERNALSPK;
auto& spk_mans = internal ? wss.m_active_internal_spks : wss.m_active_external_spks;
if (spk_mans.count(static_cast<OutputType>(type)) > 0) {
strErr = "Multiple ScriptPubKeyMans specified for a single type";
return false;
}
spk_mans[static_cast<OutputType>(type)] = id;
} else if (strType == DBKeys::WALLETDESCRIPTOR) {
uint256 id;
ssKey >> id;
WalletDescriptor desc;
ssValue >> desc;
if (wss.m_descriptor_caches.count(id) == 0) {
wss.m_descriptor_caches[id] = DescriptorCache();
}
pwallet->LoadDescriptorScriptPubKeyMan(id, desc);
} else if (strType == DBKeys::WALLETDESCRIPTORCACHE) {
bool parent = true;
uint256 desc_id;
uint32_t key_exp_index;
uint32_t der_index;
ssKey >> desc_id;
ssKey >> key_exp_index;
// if the der_index exists, it's a derived xpub
try
{
ssKey >> der_index;
parent = false;
}
catch (...) {}
std::vector<unsigned char> ser_xpub(BIP32_EXTKEY_SIZE);
ssValue >> ser_xpub;
CExtPubKey xpub;
xpub.Decode(ser_xpub.data());
if (parent) {
wss.m_descriptor_caches[desc_id].CacheParentExtPubKey(key_exp_index, xpub);
} else {
wss.m_descriptor_caches[desc_id].CacheDerivedExtPubKey(key_exp_index, der_index, xpub);
}
} else if (strType == DBKeys::WALLETDESCRIPTORKEY) {
uint256 desc_id;
CPubKey pubkey;
ssKey >> desc_id;
ssKey >> pubkey;
if (!pubkey.IsValid())
{
strErr = "Error reading wallet database: CPubKey corrupt";
return false;
}
CKey key;
CPrivKey pkey;
uint256 hash;
wss.nKeys++;
ssValue >> pkey;
ssValue >> hash;
// hash pubkey/privkey to accelerate wallet load
std::vector<unsigned char> to_hash;
to_hash.reserve(pubkey.size() + pkey.size());
to_hash.insert(to_hash.end(), pubkey.begin(), pubkey.end());
to_hash.insert(to_hash.end(), pkey.begin(), pkey.end());
if (Hash(to_hash) != hash)
{
strErr = "Error reading wallet database: CPubKey/CPrivKey corrupt";
return false;
}
if (!key.Load(pkey, pubkey, true))
{
strErr = "Error reading wallet database: CPrivKey corrupt";
return false;
}
wss.m_descriptor_keys.insert(std::make_pair(std::make_pair(desc_id, pubkey.GetID()), key));
} else if (strType == DBKeys::WALLETDESCRIPTORCKEY) {
uint256 desc_id;
CPubKey pubkey;
ssKey >> desc_id;
ssKey >> pubkey;
if (!pubkey.IsValid())
{
strErr = "Error reading wallet database: CPubKey corrupt";
return false;
}
std::vector<unsigned char> privkey;
ssValue >> privkey;
wss.nCKeys++;
wss.m_descriptor_crypt_keys.insert(std::make_pair(std::make_pair(desc_id, pubkey.GetID()), std::make_pair(pubkey, privkey)));
wss.fIsEncrypted = true;
} else if (strType != DBKeys::BESTBLOCK && strType != DBKeys::BESTBLOCK_NOMERKLE &&
strType != DBKeys::MINVERSION && strType != DBKeys::ACENTRY &&
strType != DBKeys::VERSION && strType != DBKeys::SETTINGS) {
wss.m_unknown_records++;
}
} catch (const std::exception& e) {
if (strErr.empty()) {
strErr = e.what();
}
return false;
} catch (...) {
if (strErr.empty()) {
strErr = "Caught unknown exception in ReadKeyValue";
}
return false;
}
return true;
}
bool ReadKeyValue(CWallet* pwallet, CDataStream& ssKey, CDataStream& ssValue, std::string& strType, std::string& strErr, const KeyFilterFn& filter_fn)
{
CWalletScanState dummy_wss;
LOCK(pwallet->cs_wallet);
return ReadKeyValue(pwallet, ssKey, ssValue, dummy_wss, strType, strErr, filter_fn);
}
bool WalletBatch::IsKeyType(const std::string& strType)
{
return (strType == DBKeys::KEY ||
strType == DBKeys::MASTER_KEY || strType == DBKeys::CRYPTED_KEY);
}
DBErrors WalletBatch::LoadWallet(CWallet* pwallet)
{
CWalletScanState wss;
bool fNoncriticalErrors = false;
DBErrors result = DBErrors::LOAD_OK;
LOCK(pwallet->cs_wallet);
try {
int nMinVersion = 0;
if (m_batch->Read(DBKeys::MINVERSION, nMinVersion)) {
if (nMinVersion > FEATURE_LATEST)
return DBErrors::TOO_NEW;
pwallet->LoadMinVersion(nMinVersion);
}
// Get cursor
if (!m_batch->StartCursor())
{
pwallet->WalletLogPrintf("Error getting wallet database cursor\n");
return DBErrors::CORRUPT;
}
while (true)
{
// Read next record
CDataStream ssKey(SER_DISK, CLIENT_VERSION);
CDataStream ssValue(SER_DISK, CLIENT_VERSION);
bool complete;
bool ret = m_batch->ReadAtCursor(ssKey, ssValue, complete);
if (complete) {
break;
}
else if (!ret)
{
m_batch->CloseCursor();
pwallet->WalletLogPrintf("Error reading next record from wallet database\n");
return DBErrors::CORRUPT;
}
// Try to be tolerant of single corrupt records:
std::string strType, strErr;
if (!ReadKeyValue(pwallet, ssKey, ssValue, wss, strType, strErr))
{
// losing keys is considered a catastrophic error, anything else
// we assume the user can live with:
if (IsKeyType(strType) || strType == DBKeys::DEFAULTKEY) {
result = DBErrors::CORRUPT;
} else if (strType == DBKeys::FLAGS) {
// reading the wallet flags can only fail if unknown flags are present
result = DBErrors::TOO_NEW;
} else {
// Leave other errors alone, if we try to fix them we might make things worse.
fNoncriticalErrors = true; // ... but do warn the user there is something wrong.
if (strType == DBKeys::TX)
// Rescan if there is a bad transaction record:
gArgs.SoftSetBoolArg("-rescan", true);
}
}
if (!strErr.empty())
pwallet->WalletLogPrintf("%s\n", strErr);
}
} catch (...) {
result = DBErrors::CORRUPT;
}
m_batch->CloseCursor();
// Set the active ScriptPubKeyMans
for (auto spk_man_pair : wss.m_active_external_spks) {
pwallet->LoadActiveScriptPubKeyMan(spk_man_pair.second, spk_man_pair.first, /* internal */ false);
}
for (auto spk_man_pair : wss.m_active_internal_spks) {
pwallet->LoadActiveScriptPubKeyMan(spk_man_pair.second, spk_man_pair.first, /* internal */ true);
}
// Set the descriptor caches
for (auto desc_cache_pair : wss.m_descriptor_caches) {
auto spk_man = pwallet->GetScriptPubKeyMan(desc_cache_pair.first);
assert(spk_man);
((DescriptorScriptPubKeyMan*)spk_man)->SetCache(desc_cache_pair.second);
}
// Set the descriptor keys
for (auto desc_key_pair : wss.m_descriptor_keys) {
auto spk_man = pwallet->GetScriptPubKeyMan(desc_key_pair.first.first);
((DescriptorScriptPubKeyMan*)spk_man)->AddKey(desc_key_pair.first.second, desc_key_pair.second);
}
for (auto desc_key_pair : wss.m_descriptor_crypt_keys) {
auto spk_man = pwallet->GetScriptPubKeyMan(desc_key_pair.first.first);
((DescriptorScriptPubKeyMan*)spk_man)->AddCryptedKey(desc_key_pair.first.second, desc_key_pair.second.first, desc_key_pair.second.second);
}
if (fNoncriticalErrors && result == DBErrors::LOAD_OK)
result = DBErrors::NONCRITICAL_ERROR;
// Any wallet corruption at all: skip any rewriting or
// upgrading, we don't want to make it worse.
if (result != DBErrors::LOAD_OK)
return result;
// Last client version to open this wallet, was previously the file version number
int last_client = CLIENT_VERSION;
m_batch->Read(DBKeys::VERSION, last_client);
int wallet_version = pwallet->GetVersion();
pwallet->WalletLogPrintf("Wallet File Version = %d\n", wallet_version > 0 ? wallet_version : last_client);
pwallet->WalletLogPrintf("Keys: %u plaintext, %u encrypted, %u w/ metadata, %u total. Unknown wallet records: %u\n",
wss.nKeys, wss.nCKeys, wss.nKeyMeta, wss.nKeys + wss.nCKeys, wss.m_unknown_records);
// nTimeFirstKey is only reliable if all keys have metadata
if (pwallet->IsLegacy() && (wss.nKeys + wss.nCKeys + wss.nWatchKeys) != wss.nKeyMeta) {
auto spk_man = pwallet->GetOrCreateLegacyScriptPubKeyMan();
if (spk_man) {
LOCK(spk_man->cs_KeyStore);
spk_man->UpdateTimeFirstKey(1);
}
}
for (const uint256& hash : wss.vWalletUpgrade)
WriteTx(pwallet->mapWallet.at(hash));
// Rewrite encrypted wallets of versions 0.4.0 and 0.5.0rc:
if (wss.fIsEncrypted && (last_client == 40000 || last_client == 50000))
return DBErrors::NEED_REWRITE;
if (last_client < CLIENT_VERSION) // Update
m_batch->Write(DBKeys::VERSION, CLIENT_VERSION);
if (wss.fAnyUnordered)
result = pwallet->ReorderTransactions();
// Upgrade all of the wallet keymetadata to have the hd master key id
// This operation is not atomic, but if it fails, updated entries are still backwards compatible with older software
try {
pwallet->UpgradeKeyMetadata();
} catch (...) {
result = DBErrors::CORRUPT;
}
// Set the inactive chain
if (wss.m_hd_chains.size() > 0) {
LegacyScriptPubKeyMan* legacy_spkm = pwallet->GetLegacyScriptPubKeyMan();
if (!legacy_spkm) {
pwallet->WalletLogPrintf("Inactive HD Chains found but no Legacy ScriptPubKeyMan\n");
return DBErrors::CORRUPT;
}
for (const auto& chain_pair : wss.m_hd_chains) {
if (chain_pair.first != pwallet->GetLegacyScriptPubKeyMan()->GetHDChain().seed_id) {
pwallet->GetLegacyScriptPubKeyMan()->AddInactiveHDChain(chain_pair.second);
}
}
}
return result;
}
DBErrors WalletBatch::FindWalletTx(std::vector<uint256>& vTxHash, std::list<CWalletTx>& vWtx)
{
DBErrors result = DBErrors::LOAD_OK;
try {
int nMinVersion = 0;
if (m_batch->Read(DBKeys::MINVERSION, nMinVersion)) {
if (nMinVersion > FEATURE_LATEST)
return DBErrors::TOO_NEW;
}
// Get cursor
if (!m_batch->StartCursor())
{
LogPrintf("Error getting wallet database cursor\n");
return DBErrors::CORRUPT;
}
while (true)
{
// Read next record
CDataStream ssKey(SER_DISK, CLIENT_VERSION);
CDataStream ssValue(SER_DISK, CLIENT_VERSION);
bool complete;
bool ret = m_batch->ReadAtCursor(ssKey, ssValue, complete);
if (complete) {
break;
} else if (!ret) {
m_batch->CloseCursor();
LogPrintf("Error reading next record from wallet database\n");
return DBErrors::CORRUPT;
}
std::string strType;
ssKey >> strType;
if (strType == DBKeys::TX) {
uint256 hash;
ssKey >> hash;
vTxHash.push_back(hash);
vWtx.emplace_back(nullptr /* wallet */, nullptr /* tx */);
ssValue >> vWtx.back();
}
}
} catch (...) {
result = DBErrors::CORRUPT;
}
m_batch->CloseCursor();
return result;
}
DBErrors WalletBatch::ZapSelectTx(std::vector<uint256>& vTxHashIn, std::vector<uint256>& vTxHashOut)
{
// build list of wallet TXs and hashes
std::vector<uint256> vTxHash;
std::list<CWalletTx> vWtx;
DBErrors err = FindWalletTx(vTxHash, vWtx);
if (err != DBErrors::LOAD_OK) {
return err;
}
std::sort(vTxHash.begin(), vTxHash.end());
std::sort(vTxHashIn.begin(), vTxHashIn.end());
// erase each matching wallet TX
bool delerror = false;
std::vector<uint256>::iterator it = vTxHashIn.begin();
for (const uint256& hash : vTxHash) {
while (it < vTxHashIn.end() && (*it) < hash) {
it++;
}
if (it == vTxHashIn.end()) {
break;
}
else if ((*it) == hash) {
if(!EraseTx(hash)) {
LogPrint(BCLog::WALLETDB, "Transaction was found for deletion but returned database error: %s\n", hash.GetHex());
delerror = true;
}
vTxHashOut.push_back(hash);
}
}
if (delerror) {
return DBErrors::CORRUPT;
}
return DBErrors::LOAD_OK;
}
void MaybeCompactWalletDB()
{
static std::atomic<bool> fOneThread(false);
if (fOneThread.exchange(true)) {
return;
}
for (const std::shared_ptr<CWallet>& pwallet : GetWallets()) {
WalletDatabase& dbh = pwallet->GetDBHandle();
unsigned int nUpdateCounter = dbh.nUpdateCounter;
if (dbh.nLastSeen != nUpdateCounter) {
dbh.nLastSeen = nUpdateCounter;
dbh.nLastWalletUpdate = GetTime();
}
if (dbh.nLastFlushed != nUpdateCounter && GetTime() - dbh.nLastWalletUpdate >= 2) {
if (dbh.PeriodicFlush()) {
dbh.nLastFlushed = nUpdateCounter;
}
}
}
fOneThread = false;
}
bool WalletBatch::WriteDestData(const std::string &address, const std::string &key, const std::string &value)
{
return WriteIC(std::make_pair(DBKeys::DESTDATA, std::make_pair(address, key)), value);
}
bool WalletBatch::EraseDestData(const std::string &address, const std::string &key)
{
return EraseIC(std::make_pair(DBKeys::DESTDATA, std::make_pair(address, key)));
}
bool WalletBatch::WriteHDChain(const CHDChain& chain)
{
return WriteIC(DBKeys::HDCHAIN, chain);
}
bool WalletBatch::WriteWalletFlags(const uint64_t flags)
{
return WriteIC(DBKeys::FLAGS, flags);
}
bool WalletBatch::TxnBegin()
{
return m_batch->TxnBegin();
}
bool WalletBatch::TxnCommit()
{
return m_batch->TxnCommit();
}
bool WalletBatch::TxnAbort()
{
return m_batch->TxnAbort();
}
bool IsWalletLoaded(const fs::path& wallet_path)
{
return IsBDBWalletLoaded(wallet_path);
}
/** Return object for accessing database at specified path. */
std::unique_ptr<WalletDatabase> CreateWalletDatabase(const fs::path& path)
{
std::string filename;
return MakeUnique<BerkeleyDatabase>(GetWalletEnv(path, filename), std::move(filename));
}
/** Return object for accessing dummy database with no read/write capabilities. */
std::unique_ptr<WalletDatabase> CreateDummyWalletDatabase()
{
return MakeUnique<DummyDatabase>();
}
/** Return object for accessing temporary in-memory database. */
std::unique_ptr<WalletDatabase> CreateMockWalletDatabase()
{
return MakeUnique<BerkeleyDatabase>(std::make_shared<BerkeleyEnvironment>(), "");
}
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