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scriptpubkeyman.cpp
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// Copyright (c) 2019-2022 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 <hash.h>
#include <key_io.h>
#include <logging.h>
#include <outputtype.h>
#include <script/descriptor.h>
#include <script/sign.h>
#include <util/bip32.h>
#include <util/strencodings.h>
#include <util/string.h>
#include <util/system.h>
#include <util/time.h>
#include <util/translation.h>
#include <wallet/scriptpubkeyman.h>
#include <optional>
namespace wallet {
//! Value for the first BIP 32 hardened derivation. Can be used as a bit mask and as a value. See BIP 32 for more details.
const uint32_t BIP32_HARDENED_KEY_LIMIT = 0x80000000;
util::Result<CTxDestination> LegacyScriptPubKeyMan::GetNewDestination(const OutputType type)
{
if (LEGACY_OUTPUT_TYPES.count(type) == 0) {
return util::Error{_("Error: Legacy wallets only support the \"legacy\", \"p2sh-segwit\", and \"bech32\" address types")};
}
assert(type != OutputType::BECH32M);
// Fill-up keypool if needed
TopUp();
LOCK(cs_KeyStore);
// Generate a new key that is added to wallet
CPubKey new_key;
if (!GetKeyFromPool(new_key, type)) {
return util::Error{_("Error: Keypool ran out, please call keypoolrefill first")};
}
LearnRelatedScripts(new_key, type);
return GetDestinationForKey(new_key, type);
}
typedef std::vector<unsigned char> valtype;
namespace {
/**
* This is an enum that tracks the execution context of a script, similar to
* SigVersion in script/interpreter. It is separate however because we want to
* distinguish between top-level scriptPubKey execution and P2SH redeemScript
* execution (a distinction that has no impact on consensus rules).
*/
enum class IsMineSigVersion
{
TOP = 0, //!< scriptPubKey execution
P2SH = 1, //!< P2SH redeemScript
WITNESS_V0 = 2, //!< P2WSH witness script execution
};
/**
* This is an internal representation of isminetype + invalidity.
* Its order is significant, as we return the max of all explored
* possibilities.
*/
enum class IsMineResult
{
NO = 0, //!< Not ours
WATCH_ONLY = 1, //!< Included in watch-only balance
SPENDABLE = 2, //!< Included in all balances
INVALID = 3, //!< Not spendable by anyone (uncompressed pubkey in segwit, P2SH inside P2SH or witness, witness inside witness)
};
bool PermitsUncompressed(IsMineSigVersion sigversion)
{
return sigversion == IsMineSigVersion::TOP || sigversion == IsMineSigVersion::P2SH;
}
bool HaveKeys(const std::vector<valtype>& pubkeys, const LegacyScriptPubKeyMan& keystore)
{
for (const valtype& pubkey : pubkeys) {
CKeyID keyID = CPubKey(pubkey).GetID();
if (!keystore.HaveKey(keyID)) return false;
}
return true;
}
//! Recursively solve script and return spendable/watchonly/invalid status.
//!
//! @param keystore legacy key and script store
//! @param scriptPubKey script to solve
//! @param sigversion script type (top-level / redeemscript / witnessscript)
//! @param recurse_scripthash whether to recurse into nested p2sh and p2wsh
//! scripts or simply treat any script that has been
//! stored in the keystore as spendable
IsMineResult IsMineInner(const LegacyScriptPubKeyMan& keystore, const CScript& scriptPubKey, IsMineSigVersion sigversion, bool recurse_scripthash=true)
{
IsMineResult ret = IsMineResult::NO;
std::vector<valtype> vSolutions;
TxoutType whichType = Solver(scriptPubKey, vSolutions);
CKeyID keyID;
switch (whichType) {
case TxoutType::NONSTANDARD:
case TxoutType::NULL_DATA:
case TxoutType::WITNESS_UNKNOWN:
case TxoutType::WITNESS_V1_TAPROOT:
break;
case TxoutType::PUBKEY:
keyID = CPubKey(vSolutions[0]).GetID();
if (!PermitsUncompressed(sigversion) && vSolutions[0].size() != 33) {
return IsMineResult::INVALID;
}
if (keystore.HaveKey(keyID)) {
ret = std::max(ret, IsMineResult::SPENDABLE);
}
break;
case TxoutType::WITNESS_V0_KEYHASH:
{
if (sigversion == IsMineSigVersion::WITNESS_V0) {
// P2WPKH inside P2WSH is invalid.
return IsMineResult::INVALID;
}
if (sigversion == IsMineSigVersion::TOP && !keystore.HaveCScript(CScriptID(CScript() << OP_0 << vSolutions[0]))) {
// We do not support bare witness outputs unless the P2SH version of it would be
// acceptable as well. This protects against matching before segwit activates.
// This also applies to the P2WSH case.
break;
}
ret = std::max(ret, IsMineInner(keystore, GetScriptForDestination(PKHash(uint160(vSolutions[0]))), IsMineSigVersion::WITNESS_V0));
break;
}
case TxoutType::PUBKEYHASH:
keyID = CKeyID(uint160(vSolutions[0]));
if (!PermitsUncompressed(sigversion)) {
CPubKey pubkey;
if (keystore.GetPubKey(keyID, pubkey) && !pubkey.IsCompressed()) {
return IsMineResult::INVALID;
}
}
if (keystore.HaveKey(keyID)) {
ret = std::max(ret, IsMineResult::SPENDABLE);
}
break;
case TxoutType::SCRIPTHASH:
{
if (sigversion != IsMineSigVersion::TOP) {
// P2SH inside P2WSH or P2SH is invalid.
return IsMineResult::INVALID;
}
CScriptID scriptID = CScriptID(uint160(vSolutions[0]));
CScript subscript;
if (keystore.GetCScript(scriptID, subscript)) {
ret = std::max(ret, recurse_scripthash ? IsMineInner(keystore, subscript, IsMineSigVersion::P2SH) : IsMineResult::SPENDABLE);
}
break;
}
case TxoutType::WITNESS_V0_SCRIPTHASH:
{
if (sigversion == IsMineSigVersion::WITNESS_V0) {
// P2WSH inside P2WSH is invalid.
return IsMineResult::INVALID;
}
if (sigversion == IsMineSigVersion::TOP && !keystore.HaveCScript(CScriptID(CScript() << OP_0 << vSolutions[0]))) {
break;
}
CScriptID scriptID{RIPEMD160(vSolutions[0])};
CScript subscript;
if (keystore.GetCScript(scriptID, subscript)) {
ret = std::max(ret, recurse_scripthash ? IsMineInner(keystore, subscript, IsMineSigVersion::WITNESS_V0) : IsMineResult::SPENDABLE);
}
break;
}
case TxoutType::MULTISIG:
{
// Never treat bare multisig outputs as ours (they can still be made watchonly-though)
if (sigversion == IsMineSigVersion::TOP) {
break;
}
// Only consider transactions "mine" if we own ALL the
// keys involved. Multi-signature transactions that are
// partially owned (somebody else has a key that can spend
// them) enable spend-out-from-under-you attacks, especially
// in shared-wallet situations.
std::vector<valtype> keys(vSolutions.begin()+1, vSolutions.begin()+vSolutions.size()-1);
if (!PermitsUncompressed(sigversion)) {
for (size_t i = 0; i < keys.size(); i++) {
if (keys[i].size() != 33) {
return IsMineResult::INVALID;
}
}
}
if (HaveKeys(keys, keystore)) {
ret = std::max(ret, IsMineResult::SPENDABLE);
}
break;
}
} // no default case, so the compiler can warn about missing cases
if (ret == IsMineResult::NO && keystore.HaveWatchOnly(scriptPubKey)) {
ret = std::max(ret, IsMineResult::WATCH_ONLY);
}
return ret;
}
} // namespace
isminetype LegacyScriptPubKeyMan::IsMine(const CScript& script) const
{
switch (IsMineInner(*this, script, IsMineSigVersion::TOP)) {
case IsMineResult::INVALID:
case IsMineResult::NO:
return ISMINE_NO;
case IsMineResult::WATCH_ONLY:
return ISMINE_WATCH_ONLY;
case IsMineResult::SPENDABLE:
return ISMINE_SPENDABLE;
}
assert(false);
}
bool LegacyScriptPubKeyMan::CheckDecryptionKey(const CKeyingMaterial& master_key, bool accept_no_keys)
{
{
LOCK(cs_KeyStore);
assert(mapKeys.empty());
bool keyPass = mapCryptedKeys.empty(); // Always pass when there are no encrypted keys
bool keyFail = false;
CryptedKeyMap::const_iterator mi = mapCryptedKeys.begin();
WalletBatch batch(m_storage.GetDatabase());
for (; mi != mapCryptedKeys.end(); ++mi)
{
const CPubKey &vchPubKey = (*mi).second.first;
const std::vector<unsigned char> &vchCryptedSecret = (*mi).second.second;
CKey key;
if (!DecryptKey(master_key, vchCryptedSecret, vchPubKey, key))
{
keyFail = true;
break;
}
keyPass = true;
if (fDecryptionThoroughlyChecked)
break;
else {
// Rewrite these encrypted keys with checksums
batch.WriteCryptedKey(vchPubKey, vchCryptedSecret, mapKeyMetadata[vchPubKey.GetID()]);
}
}
if (keyPass && keyFail)
{
LogPrintf("The wallet is probably corrupted: Some keys decrypt but not all.\n");
throw std::runtime_error("Error unlocking wallet: some keys decrypt but not all. Your wallet file may be corrupt.");
}
if (keyFail || (!keyPass && !accept_no_keys))
return false;
fDecryptionThoroughlyChecked = true;
}
return true;
}
bool LegacyScriptPubKeyMan::Encrypt(const CKeyingMaterial& master_key, WalletBatch* batch)
{
LOCK(cs_KeyStore);
encrypted_batch = batch;
if (!mapCryptedKeys.empty()) {
encrypted_batch = nullptr;
return false;
}
KeyMap keys_to_encrypt;
keys_to_encrypt.swap(mapKeys); // Clear mapKeys so AddCryptedKeyInner will succeed.
for (const KeyMap::value_type& mKey : keys_to_encrypt)
{
const CKey &key = mKey.second;
CPubKey vchPubKey = key.GetPubKey();
CKeyingMaterial vchSecret(key.begin(), key.end());
std::vector<unsigned char> vchCryptedSecret;
if (!EncryptSecret(master_key, vchSecret, vchPubKey.GetHash(), vchCryptedSecret)) {
encrypted_batch = nullptr;
return false;
}
if (!AddCryptedKey(vchPubKey, vchCryptedSecret)) {
encrypted_batch = nullptr;
return false;
}
}
encrypted_batch = nullptr;
return true;
}
util::Result<CTxDestination> LegacyScriptPubKeyMan::GetReservedDestination(const OutputType type, bool internal, int64_t& index, CKeyPool& keypool)
{
if (LEGACY_OUTPUT_TYPES.count(type) == 0) {
return util::Error{_("Error: Legacy wallets only support the \"legacy\", \"p2sh-segwit\", and \"bech32\" address types")};
}
assert(type != OutputType::BECH32M);
LOCK(cs_KeyStore);
if (!CanGetAddresses(internal)) {
return util::Error{_("Error: Keypool ran out, please call keypoolrefill first")};
}
// Fill-up keypool if needed
TopUp();
if (!ReserveKeyFromKeyPool(index, keypool, internal)) {
return util::Error{_("Error: Keypool ran out, please call keypoolrefill first")};
}
return GetDestinationForKey(keypool.vchPubKey, type);
}
bool LegacyScriptPubKeyMan::TopUpInactiveHDChain(const CKeyID seed_id, int64_t index, bool internal)
{
LOCK(cs_KeyStore);
auto it = m_inactive_hd_chains.find(seed_id);
if (it == m_inactive_hd_chains.end()) {
return false;
}
CHDChain& chain = it->second;
if (internal) {
chain.m_next_internal_index = std::max(chain.m_next_internal_index, index + 1);
} else {
chain.m_next_external_index = std::max(chain.m_next_external_index, index + 1);
}
TopUpChain(chain, 0);
return true;
}
std::vector<WalletDestination> LegacyScriptPubKeyMan::MarkUnusedAddresses(const CScript& script)
{
LOCK(cs_KeyStore);
std::vector<WalletDestination> result;
// extract addresses and check if they match with an unused keypool key
for (const auto& keyid : GetAffectedKeys(script, *this)) {
std::map<CKeyID, int64_t>::const_iterator mi = m_pool_key_to_index.find(keyid);
if (mi != m_pool_key_to_index.end()) {
WalletLogPrintf("%s: Detected a used keypool key, mark all keypool keys up to this key as used\n", __func__);
for (const auto& keypool : MarkReserveKeysAsUsed(mi->second)) {
// derive all possible destinations as any of them could have been used
for (const auto& type : LEGACY_OUTPUT_TYPES) {
const auto& dest = GetDestinationForKey(keypool.vchPubKey, type);
result.push_back({dest, keypool.fInternal});
}
}
if (!TopUp()) {
WalletLogPrintf("%s: Topping up keypool failed (locked wallet)\n", __func__);
}
}
// Find the key's metadata and check if it's seed id (if it has one) is inactive, i.e. it is not the current m_hd_chain seed id.
// If so, TopUp the inactive hd chain
auto it = mapKeyMetadata.find(keyid);
if (it != mapKeyMetadata.end()){
CKeyMetadata meta = it->second;
if (!meta.hd_seed_id.IsNull() && meta.hd_seed_id != m_hd_chain.seed_id) {
std::vector<uint32_t> path;
if (meta.has_key_origin) {
path = meta.key_origin.path;
} else if (!ParseHDKeypath(meta.hdKeypath, path)) {
WalletLogPrintf("%s: Adding inactive seed keys failed, invalid hdKeypath: %s\n",
__func__,
meta.hdKeypath);
}
if (path.size() != 3) {
WalletLogPrintf("%s: Adding inactive seed keys failed, invalid path size: %d, has_key_origin: %s\n",
__func__,
path.size(),
meta.has_key_origin);
} else {
bool internal = (path[1] & ~BIP32_HARDENED_KEY_LIMIT) != 0;
int64_t index = path[2] & ~BIP32_HARDENED_KEY_LIMIT;
if (!TopUpInactiveHDChain(meta.hd_seed_id, index, internal)) {
WalletLogPrintf("%s: Adding inactive seed keys failed\n", __func__);
}
}
}
}
}
return result;
}
void LegacyScriptPubKeyMan::UpgradeKeyMetadata()
{
LOCK(cs_KeyStore);
if (m_storage.IsLocked() || m_storage.IsWalletFlagSet(WALLET_FLAG_KEY_ORIGIN_METADATA)) {
return;
}
std::unique_ptr<WalletBatch> batch = std::make_unique<WalletBatch>(m_storage.GetDatabase());
for (auto& meta_pair : mapKeyMetadata) {
CKeyMetadata& meta = meta_pair.second;
if (!meta.hd_seed_id.IsNull() && !meta.has_key_origin && meta.hdKeypath != "s") { // If the hdKeypath is "s", that's the seed and it doesn't have a key origin
CKey key;
GetKey(meta.hd_seed_id, key);
CExtKey masterKey;
masterKey.SetSeed(key);
// Add to map
CKeyID master_id = masterKey.key.GetPubKey().GetID();
std::copy(master_id.begin(), master_id.begin() + 4, meta.key_origin.fingerprint);
if (!ParseHDKeypath(meta.hdKeypath, meta.key_origin.path)) {
throw std::runtime_error("Invalid stored hdKeypath");
}
meta.has_key_origin = true;
if (meta.nVersion < CKeyMetadata::VERSION_WITH_KEY_ORIGIN) {
meta.nVersion = CKeyMetadata::VERSION_WITH_KEY_ORIGIN;
}
// Write meta to wallet
CPubKey pubkey;
if (GetPubKey(meta_pair.first, pubkey)) {
batch->WriteKeyMetadata(meta, pubkey, true);
}
}
}
}
bool LegacyScriptPubKeyMan::SetupGeneration(bool force)
{
if ((CanGenerateKeys() && !force) || m_storage.IsLocked()) {
return false;
}
SetHDSeed(GenerateNewSeed());
if (!NewKeyPool()) {
return false;
}
return true;
}
bool LegacyScriptPubKeyMan::IsHDEnabled() const
{
return !m_hd_chain.seed_id.IsNull();
}
bool LegacyScriptPubKeyMan::CanGetAddresses(bool internal) const
{
LOCK(cs_KeyStore);
// Check if the keypool has keys
bool keypool_has_keys;
if (internal && m_storage.CanSupportFeature(FEATURE_HD_SPLIT)) {
keypool_has_keys = setInternalKeyPool.size() > 0;
} else {
keypool_has_keys = KeypoolCountExternalKeys() > 0;
}
// If the keypool doesn't have keys, check if we can generate them
if (!keypool_has_keys) {
return CanGenerateKeys();
}
return keypool_has_keys;
}
bool LegacyScriptPubKeyMan::Upgrade(int prev_version, int new_version, bilingual_str& error)
{
LOCK(cs_KeyStore);
if (m_storage.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
// Nothing to do here if private keys are not enabled
return true;
}
bool hd_upgrade = false;
bool split_upgrade = false;
if (IsFeatureSupported(new_version, FEATURE_HD) && !IsHDEnabled()) {
WalletLogPrintf("Upgrading wallet to HD\n");
m_storage.SetMinVersion(FEATURE_HD);
// generate a new master key
CPubKey masterPubKey = GenerateNewSeed();
SetHDSeed(masterPubKey);
hd_upgrade = true;
}
// Upgrade to HD chain split if necessary
if (!IsFeatureSupported(prev_version, FEATURE_HD_SPLIT) && IsFeatureSupported(new_version, FEATURE_HD_SPLIT)) {
WalletLogPrintf("Upgrading wallet to use HD chain split\n");
m_storage.SetMinVersion(FEATURE_PRE_SPLIT_KEYPOOL);
split_upgrade = FEATURE_HD_SPLIT > prev_version;
// Upgrade the HDChain
if (m_hd_chain.nVersion < CHDChain::VERSION_HD_CHAIN_SPLIT) {
m_hd_chain.nVersion = CHDChain::VERSION_HD_CHAIN_SPLIT;
if (!WalletBatch(m_storage.GetDatabase()).WriteHDChain(m_hd_chain)) {
throw std::runtime_error(std::string(__func__) + ": writing chain failed");
}
}
}
// Mark all keys currently in the keypool as pre-split
if (split_upgrade) {
MarkPreSplitKeys();
}
// Regenerate the keypool if upgraded to HD
if (hd_upgrade) {
if (!NewKeyPool()) {
error = _("Unable to generate keys");
return false;
}
}
return true;
}
bool LegacyScriptPubKeyMan::HavePrivateKeys() const
{
LOCK(cs_KeyStore);
return !mapKeys.empty() || !mapCryptedKeys.empty();
}
void LegacyScriptPubKeyMan::RewriteDB()
{
LOCK(cs_KeyStore);
setInternalKeyPool.clear();
setExternalKeyPool.clear();
m_pool_key_to_index.clear();
// Note: can't top-up keypool here, because wallet is locked.
// User will be prompted to unlock wallet the next operation
// that requires a new key.
}
static int64_t GetOldestKeyTimeInPool(const std::set<int64_t>& setKeyPool, WalletBatch& batch) {
if (setKeyPool.empty()) {
return GetTime();
}
CKeyPool keypool;
int64_t nIndex = *(setKeyPool.begin());
if (!batch.ReadPool(nIndex, keypool)) {
throw std::runtime_error(std::string(__func__) + ": read oldest key in keypool failed");
}
assert(keypool.vchPubKey.IsValid());
return keypool.nTime;
}
std::optional<int64_t> LegacyScriptPubKeyMan::GetOldestKeyPoolTime() const
{
LOCK(cs_KeyStore);
WalletBatch batch(m_storage.GetDatabase());
// load oldest key from keypool, get time and return
int64_t oldestKey = GetOldestKeyTimeInPool(setExternalKeyPool, batch);
if (IsHDEnabled() && m_storage.CanSupportFeature(FEATURE_HD_SPLIT)) {
oldestKey = std::max(GetOldestKeyTimeInPool(setInternalKeyPool, batch), oldestKey);
if (!set_pre_split_keypool.empty()) {
oldestKey = std::max(GetOldestKeyTimeInPool(set_pre_split_keypool, batch), oldestKey);
}
}
return oldestKey;
}
size_t LegacyScriptPubKeyMan::KeypoolCountExternalKeys() const
{
LOCK(cs_KeyStore);
return setExternalKeyPool.size() + set_pre_split_keypool.size();
}
unsigned int LegacyScriptPubKeyMan::GetKeyPoolSize() const
{
LOCK(cs_KeyStore);
return setInternalKeyPool.size() + setExternalKeyPool.size() + set_pre_split_keypool.size();
}
int64_t LegacyScriptPubKeyMan::GetTimeFirstKey() const
{
LOCK(cs_KeyStore);
return nTimeFirstKey;
}
std::unique_ptr<SigningProvider> LegacyScriptPubKeyMan::GetSolvingProvider(const CScript& script) const
{
return std::make_unique<LegacySigningProvider>(*this);
}
bool LegacyScriptPubKeyMan::CanProvide(const CScript& script, SignatureData& sigdata)
{
IsMineResult ismine = IsMineInner(*this, script, IsMineSigVersion::TOP, /* recurse_scripthash= */ false);
if (ismine == IsMineResult::SPENDABLE || ismine == IsMineResult::WATCH_ONLY) {
// If ismine, it means we recognize keys or script ids in the script, or
// are watching the script itself, and we can at least provide metadata
// or solving information, even if not able to sign fully.
return true;
} else {
// If, given the stuff in sigdata, we could make a valid signature, then we can provide for this script
ProduceSignature(*this, DUMMY_SIGNATURE_CREATOR, script, sigdata);
if (!sigdata.signatures.empty()) {
// If we could make signatures, make sure we have a private key to actually make a signature
bool has_privkeys = false;
for (const auto& key_sig_pair : sigdata.signatures) {
has_privkeys |= HaveKey(key_sig_pair.first);
}
return has_privkeys;
}
return false;
}
}
bool LegacyScriptPubKeyMan::SignTransaction(CMutableTransaction& tx, const std::map<COutPoint, Coin>& coins, int sighash, std::map<int, bilingual_str>& input_errors) const
{
return ::SignTransaction(tx, this, coins, sighash, input_errors);
}
SigningResult LegacyScriptPubKeyMan::SignMessage(const std::string& message, const PKHash& pkhash, std::string& str_sig) const
{
CKey key;
if (!GetKey(ToKeyID(pkhash), key)) {
return SigningResult::PRIVATE_KEY_NOT_AVAILABLE;
}
if (MessageSign(key, message, str_sig)) {
return SigningResult::OK;
}
return SigningResult::SIGNING_FAILED;
}
TransactionError LegacyScriptPubKeyMan::FillPSBT(PartiallySignedTransaction& psbtx, const PrecomputedTransactionData& txdata, int sighash_type, bool sign, bool bip32derivs, int* n_signed, bool finalize) const
{
if (n_signed) {
*n_signed = 0;
}
for (unsigned int i = 0; i < psbtx.tx->vin.size(); ++i) {
const CTxIn& txin = psbtx.tx->vin[i];
PSBTInput& input = psbtx.inputs.at(i);
if (PSBTInputSigned(input)) {
continue;
}
// Get the Sighash type
if (sign && input.sighash_type != std::nullopt && *input.sighash_type != sighash_type) {
return TransactionError::SIGHASH_MISMATCH;
}
// Check non_witness_utxo has specified prevout
if (input.non_witness_utxo) {
if (txin.prevout.n >= input.non_witness_utxo->vout.size()) {
return TransactionError::MISSING_INPUTS;
}
} else if (input.witness_utxo.IsNull()) {
// There's no UTXO so we can just skip this now
continue;
}
SignatureData sigdata;
input.FillSignatureData(sigdata);
SignPSBTInput(HidingSigningProvider(this, !sign, !bip32derivs), psbtx, i, &txdata, sighash_type, nullptr, finalize);
bool signed_one = PSBTInputSigned(input);
if (n_signed && (signed_one || !sign)) {
// If sign is false, we assume that we _could_ sign if we get here. This
// will never have false negatives; it is hard to tell under what i
// circumstances it could have false positives.
(*n_signed)++;
}
}
// Fill in the bip32 keypaths and redeemscripts for the outputs so that hardware wallets can identify change
for (unsigned int i = 0; i < psbtx.tx->vout.size(); ++i) {
UpdatePSBTOutput(HidingSigningProvider(this, true, !bip32derivs), psbtx, i);
}
return TransactionError::OK;
}
std::unique_ptr<CKeyMetadata> LegacyScriptPubKeyMan::GetMetadata(const CTxDestination& dest) const
{
LOCK(cs_KeyStore);
CKeyID key_id = GetKeyForDestination(*this, dest);
if (!key_id.IsNull()) {
auto it = mapKeyMetadata.find(key_id);
if (it != mapKeyMetadata.end()) {
return std::make_unique<CKeyMetadata>(it->second);
}
}
CScript scriptPubKey = GetScriptForDestination(dest);
auto it = m_script_metadata.find(CScriptID(scriptPubKey));
if (it != m_script_metadata.end()) {
return std::make_unique<CKeyMetadata>(it->second);
}
return nullptr;
}
uint256 LegacyScriptPubKeyMan::GetID() const
{
return uint256::ONE;
}
/**
* Update wallet first key creation time. This should be called whenever keys
* are added to the wallet, with the oldest key creation time.
*/
void LegacyScriptPubKeyMan::UpdateTimeFirstKey(int64_t nCreateTime)
{
AssertLockHeld(cs_KeyStore);
if (nCreateTime <= 1) {
// Cannot determine birthday information, so set the wallet birthday to
// the beginning of time.
nTimeFirstKey = 1;
} else if (!nTimeFirstKey || nCreateTime < nTimeFirstKey) {
nTimeFirstKey = nCreateTime;
}
}
bool LegacyScriptPubKeyMan::LoadKey(const CKey& key, const CPubKey &pubkey)
{
return AddKeyPubKeyInner(key, pubkey);
}
bool LegacyScriptPubKeyMan::AddKeyPubKey(const CKey& secret, const CPubKey &pubkey)
{
LOCK(cs_KeyStore);
WalletBatch batch(m_storage.GetDatabase());
return LegacyScriptPubKeyMan::AddKeyPubKeyWithDB(batch, secret, pubkey);
}
bool LegacyScriptPubKeyMan::AddKeyPubKeyWithDB(WalletBatch& batch, const CKey& secret, const CPubKey& pubkey)
{
AssertLockHeld(cs_KeyStore);
// Make sure we aren't adding private keys to private key disabled wallets
assert(!m_storage.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS));
// FillableSigningProvider has no concept of wallet databases, but calls AddCryptedKey
// which is overridden below. To avoid flushes, the database handle is
// tunneled through to it.
bool needsDB = !encrypted_batch;
if (needsDB) {
encrypted_batch = &batch;
}
if (!AddKeyPubKeyInner(secret, pubkey)) {
if (needsDB) encrypted_batch = nullptr;
return false;
}
if (needsDB) encrypted_batch = nullptr;
// check if we need to remove from watch-only
CScript script;
script = GetScriptForDestination(PKHash(pubkey));
if (HaveWatchOnly(script)) {
RemoveWatchOnly(script);
}
script = GetScriptForRawPubKey(pubkey);
if (HaveWatchOnly(script)) {
RemoveWatchOnly(script);
}
if (!m_storage.HasEncryptionKeys()) {
return batch.WriteKey(pubkey,
secret.GetPrivKey(),
mapKeyMetadata[pubkey.GetID()]);
}
m_storage.UnsetBlankWalletFlag(batch);
return true;
}
bool LegacyScriptPubKeyMan::LoadCScript(const CScript& redeemScript)
{
/* A sanity check was added in pull #3843 to avoid adding redeemScripts
* that never can be redeemed. However, old wallets may still contain
* these. Do not add them to the wallet and warn. */
if (redeemScript.size() > MAX_SCRIPT_ELEMENT_SIZE)
{
std::string strAddr = EncodeDestination(ScriptHash(redeemScript));
WalletLogPrintf("%s: Warning: This wallet contains a redeemScript of size %i which exceeds maximum size %i thus can never be redeemed. Do not use address %s.\n", __func__, redeemScript.size(), MAX_SCRIPT_ELEMENT_SIZE, strAddr);
return true;
}
return FillableSigningProvider::AddCScript(redeemScript);
}
void LegacyScriptPubKeyMan::LoadKeyMetadata(const CKeyID& keyID, const CKeyMetadata& meta)
{
LOCK(cs_KeyStore);
UpdateTimeFirstKey(meta.nCreateTime);
mapKeyMetadata[keyID] = meta;
}
void LegacyScriptPubKeyMan::LoadScriptMetadata(const CScriptID& script_id, const CKeyMetadata& meta)
{
LOCK(cs_KeyStore);
UpdateTimeFirstKey(meta.nCreateTime);
m_script_metadata[script_id] = meta;
}
bool LegacyScriptPubKeyMan::AddKeyPubKeyInner(const CKey& key, const CPubKey &pubkey)
{
LOCK(cs_KeyStore);
if (!m_storage.HasEncryptionKeys()) {
return FillableSigningProvider::AddKeyPubKey(key, pubkey);
}
if (m_storage.IsLocked()) {
return false;
}
std::vector<unsigned char> vchCryptedSecret;
CKeyingMaterial vchSecret(key.begin(), key.end());
if (!EncryptSecret(m_storage.GetEncryptionKey(), vchSecret, pubkey.GetHash(), vchCryptedSecret)) {
return false;
}
if (!AddCryptedKey(pubkey, vchCryptedSecret)) {
return false;
}
return true;
}
bool LegacyScriptPubKeyMan::LoadCryptedKey(const CPubKey &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret, bool checksum_valid)
{
// Set fDecryptionThoroughlyChecked to false when the checksum is invalid
if (!checksum_valid) {
fDecryptionThoroughlyChecked = false;
}
return AddCryptedKeyInner(vchPubKey, vchCryptedSecret);
}
bool LegacyScriptPubKeyMan::AddCryptedKeyInner(const CPubKey &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret)
{
LOCK(cs_KeyStore);
assert(mapKeys.empty());
mapCryptedKeys[vchPubKey.GetID()] = make_pair(vchPubKey, vchCryptedSecret);
ImplicitlyLearnRelatedKeyScripts(vchPubKey);
return true;
}
bool LegacyScriptPubKeyMan::AddCryptedKey(const CPubKey &vchPubKey,
const std::vector<unsigned char> &vchCryptedSecret)
{
if (!AddCryptedKeyInner(vchPubKey, vchCryptedSecret))
return false;
{
LOCK(cs_KeyStore);
if (encrypted_batch)
return encrypted_batch->WriteCryptedKey(vchPubKey,
vchCryptedSecret,
mapKeyMetadata[vchPubKey.GetID()]);
else
return WalletBatch(m_storage.GetDatabase()).WriteCryptedKey(vchPubKey,
vchCryptedSecret,
mapKeyMetadata[vchPubKey.GetID()]);
}
}
bool LegacyScriptPubKeyMan::HaveWatchOnly(const CScript &dest) const
{
LOCK(cs_KeyStore);
return setWatchOnly.count(dest) > 0;
}
bool LegacyScriptPubKeyMan::HaveWatchOnly() const
{
LOCK(cs_KeyStore);
return (!setWatchOnly.empty());
}
static bool ExtractPubKey(const CScript &dest, CPubKey& pubKeyOut)
{
std::vector<std::vector<unsigned char>> solutions;
return Solver(dest, solutions) == TxoutType::PUBKEY &&
(pubKeyOut = CPubKey(solutions[0])).IsFullyValid();
}
bool LegacyScriptPubKeyMan::RemoveWatchOnly(const CScript &dest)
{
{
LOCK(cs_KeyStore);
setWatchOnly.erase(dest);
CPubKey pubKey;
if (ExtractPubKey(dest, pubKey)) {
mapWatchKeys.erase(pubKey.GetID());
}
// Related CScripts are not removed; having superfluous scripts around is
// harmless (see comment in ImplicitlyLearnRelatedKeyScripts).
}
if (!HaveWatchOnly())
NotifyWatchonlyChanged(false);
if (!WalletBatch(m_storage.GetDatabase()).EraseWatchOnly(dest))
return false;
return true;
}
bool LegacyScriptPubKeyMan::LoadWatchOnly(const CScript &dest)
{
return AddWatchOnlyInMem(dest);
}
bool LegacyScriptPubKeyMan::AddWatchOnlyInMem(const CScript &dest)
{
LOCK(cs_KeyStore);
setWatchOnly.insert(dest);
CPubKey pubKey;
if (ExtractPubKey(dest, pubKey)) {
mapWatchKeys[pubKey.GetID()] = pubKey;
ImplicitlyLearnRelatedKeyScripts(pubKey);
}
return true;
}
bool LegacyScriptPubKeyMan::AddWatchOnlyWithDB(WalletBatch &batch, const CScript& dest)
{
if (!AddWatchOnlyInMem(dest))
return false;
const CKeyMetadata& meta = m_script_metadata[CScriptID(dest)];
UpdateTimeFirstKey(meta.nCreateTime);
NotifyWatchonlyChanged(true);
if (batch.WriteWatchOnly(dest, meta)) {
m_storage.UnsetBlankWalletFlag(batch);
return true;
}
return false;
}
bool LegacyScriptPubKeyMan::AddWatchOnlyWithDB(WalletBatch &batch, const CScript& dest, int64_t create_time)
{
m_script_metadata[CScriptID(dest)].nCreateTime = create_time;
return AddWatchOnlyWithDB(batch, dest);
}
bool LegacyScriptPubKeyMan::AddWatchOnly(const CScript& dest)
{
WalletBatch batch(m_storage.GetDatabase());
return AddWatchOnlyWithDB(batch, dest);
}
bool LegacyScriptPubKeyMan::AddWatchOnly(const CScript& dest, int64_t nCreateTime)
{
m_script_metadata[CScriptID(dest)].nCreateTime = nCreateTime;
return AddWatchOnly(dest);
}
void LegacyScriptPubKeyMan::LoadHDChain(const CHDChain& chain)
{
LOCK(cs_KeyStore);
m_hd_chain = chain;
}
void LegacyScriptPubKeyMan::AddHDChain(const CHDChain& chain)
{
LOCK(cs_KeyStore);
// Store the new chain
if (!WalletBatch(m_storage.GetDatabase()).WriteHDChain(chain)) {
throw std::runtime_error(std::string(__func__) + ": writing chain failed");
}
// When there's an old chain, add it as an inactive chain as we are now rotating hd chains
if (!m_hd_chain.seed_id.IsNull()) {
AddInactiveHDChain(m_hd_chain);
}
m_hd_chain = chain;
}
void LegacyScriptPubKeyMan::AddInactiveHDChain(const CHDChain& chain)
{
LOCK(cs_KeyStore);
assert(!chain.seed_id.IsNull());
m_inactive_hd_chains[chain.seed_id] = chain;
}
bool LegacyScriptPubKeyMan::HaveKey(const CKeyID &address) const
{
LOCK(cs_KeyStore);
if (!m_storage.HasEncryptionKeys()) {
return FillableSigningProvider::HaveKey(address);
}
return mapCryptedKeys.count(address) > 0;
}
bool LegacyScriptPubKeyMan::GetKey(const CKeyID &address, CKey& keyOut) const
{
LOCK(cs_KeyStore);
if (!m_storage.HasEncryptionKeys()) {
return FillableSigningProvider::GetKey(address, keyOut);
}
CryptedKeyMap::const_iterator mi = mapCryptedKeys.find(address);
if (mi != mapCryptedKeys.end())
{
const CPubKey &vchPubKey = (*mi).second.first;
const std::vector<unsigned char> &vchCryptedSecret = (*mi).second.second;
return DecryptKey(m_storage.GetEncryptionKey(), vchCryptedSecret, vchPubKey, keyOut);
}
return false;
}