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scriptpubkeyman.cpp
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// Copyright (c) 2019-2021 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 <key_io.h>
#include <chainparams.h>
#include <logging.h>
#include <messagesigner.h>
#include <script/descriptor.h>
#include <script/sign.h>
#include <shutdown.h>
#include <util/bip32.h>
#include <util/strencodings.h>
#include <util/system.h>
#include <util/translation.h>
#include <wallet/scriptpubkeyman.h>
bool LegacyScriptPubKeyMan::GetNewDestination(CTxDestination& dest, bilingual_str& error)
{
LOCK(cs_KeyStore);
error.clear();
// Generate a new key that is added to wallet
CPubKey new_key;
if (!GetKeyFromPool(new_key, false)) {
error = _("Error: Keypool ran out, please call keypoolrefill first");
return false;
}
//LearnRelatedScripts(new_key);
dest = PKHash(new_key);
return true;
}
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
};
/**
* 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 (P2SH inside P2SH)
};
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)
//! @param recurse_scripthash whether to recurse into nested p2sh
//! 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:
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::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 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::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& scriptPubKey) const
{
switch (IsMineInner(*this, scriptPubKey, 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);
}
isminetype LegacyScriptPubKeyMan::IsMine(const CTxDestination& dest) const
{
CScript script = GetScriptForDestination(dest);
return IsMine(script);
}
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) {
return false;
}
if (!keyPass && !accept_no_keys && (m_hd_chain.IsNull() || !m_hd_chain.IsNull() && !m_hd_chain.IsCrypted())) {
return false;
}
if(!m_hd_chain.IsNull() && !m_hd_chain.IsCrypted()) {
// try to decrypt seed and make sure it matches
CHDChain hdChainTmp;
if (!DecryptHDChain(master_key, hdChainTmp) || (m_hd_chain.GetID() != hdChainTmp.GetSeedHash())) {
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;
}
// must get current HD chain before EncryptKeys
CHDChain hdChainCurrent;
GetHDChain(hdChainCurrent);
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;
}
}
if (!hdChainCurrent.IsNull()) {
bool res = EncryptHDChain(master_key, m_hd_chain);
assert(res);
res = LoadHDChain(m_hd_chain);
assert(res);
CHDChain hdChainCrypted;
res = GetHDChain(hdChainCrypted);
assert(res);
// ids should match, seed hashes should not
assert(hdChainCurrent.GetID() == hdChainCrypted.GetID());
assert(hdChainCurrent.GetSeedHash() != hdChainCrypted.GetSeedHash());
res = AddHDChain(*encrypted_batch, hdChainCrypted);
assert(res);
}
encrypted_batch = nullptr;
return true;
}
bool LegacyScriptPubKeyMan::GetReservedDestination(bool internal, CTxDestination& address, int64_t& index, CKeyPool& keypool)
{
LOCK(cs_KeyStore);
if (!CanGetAddresses(internal)) {
return false;
}
if (!ReserveKeyFromKeyPool(index, keypool, internal)) {
return false;
}
// TODO: unify with bitcoin and use here GetDestinationForKey even if we have no type
address = PKHash(keypool.vchPubKey);
return true;
}
void LegacyScriptPubKeyMan::MarkUnusedAddresses(WalletBatch &batch, const CScript& script, const std::optional<int64_t>& block_time)
{
LOCK(cs_KeyStore);
// 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 key up to this key as used\n", __func__);
MarkReserveKeysAsUsed(mi->second);
if (!TopUpInner()) {
WalletLogPrintf("%s: Topping up keypool failed (locked wallet)\n", __func__);
}
}
if (block_time) {
if (mapKeyMetadata[keyid].nCreateTime > *block_time) {
WalletLogPrintf("%s: Found a key which appears to be used earlier than we expected, updating metadata\n", __func__);
CPubKey vchPubKey;
bool res = GetPubKey(keyid, vchPubKey);
assert(res); // this should never fail
mapKeyMetadata[keyid].nCreateTime = *block_time;
batch.WriteKeyMetadata(mapKeyMetadata[keyid], vchPubKey, true);
UpdateTimeFirstKey(*block_time);
}
}
}
}
void LegacyScriptPubKeyMan::UpgradeKeyMetadata()
{
LOCK(cs_KeyStore); // mapKeyMetadata
if (m_storage.IsLocked(false) || m_storage.IsWalletFlagSet(WALLET_FLAG_KEY_ORIGIN_METADATA) || !IsHDEnabled()) {
return;
}
CHDChain hdChainCurrent;
if (!GetHDChain(hdChainCurrent))
throw std::runtime_error(std::string(__func__) + ": GetHDChain failed");
if (!m_storage.WithEncryptionKey([&](const CKeyingMaterial& encryption_key) {
return DecryptHDChain(encryption_key, hdChainCurrent);
})) {
throw std::runtime_error(std::string(__func__) + ": DecryptHDChain failed");
}
CExtKey masterKey;
SecureVector vchSeed = hdChainCurrent.GetSeed();
masterKey.SetSeed(MakeByteSpan(vchSeed));
CKeyID master_id = masterKey.key.GetPubKey().GetID();
std::unique_ptr<WalletBatch> batch = std::make_unique<WalletBatch>(m_storage.GetDatabase());
size_t cnt = 0;
for (auto& meta_pair : mapKeyMetadata) {
const CKeyID& keyid = meta_pair.first;
CKeyMetadata& meta = meta_pair.second;
if (!meta.has_key_origin) {
HDPubKeyMap::const_iterator mi = mapHdPubKeys.find(keyid);
if (mi == mapHdPubKeys.end()) {
continue;
}
// Add to map
std::copy(master_id.begin(), master_id.begin() + 4, meta.key_origin.fingerprint);
if (!ParseHDKeypath(mi->second.GetKeyPath(), meta.key_origin.path)) {
throw std::runtime_error("Invalid HD keypath");
}
meta.has_key_origin = true;
if (meta.nVersion < CKeyMetadata::VERSION_WITH_KEY_ORIGIN) {
meta.nVersion = CKeyMetadata::VERSION_WITH_KEY_ORIGIN;
}
// Write meta to wallet
batch->WriteKeyMetadata(meta, mi->second.extPubKey.pubkey, true);
if (++cnt % 1000 == 0) {
// avoid creating overlarge in-memory batches in case the wallet contains large amounts of keys
batch.reset(new WalletBatch(m_storage.GetDatabase()));
}
}
}
}
void LegacyScriptPubKeyMan::GenerateNewHDChain(const SecureString& secureMnemonic, const SecureString& secureMnemonicPassphrase, std::optional<CKeyingMaterial> vMasterKeyOpt)
{
assert(!m_storage.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS));
CHDChain newHdChain;
// NOTE: an empty mnemonic means "generate a new one for me"
// NOTE: default mnemonic passphrase is an empty string
if (!newHdChain.SetMnemonic(secureMnemonic, secureMnemonicPassphrase, /* fUpdateID = */ true)) {
throw std::runtime_error(std::string(__func__) + ": SetMnemonic failed");
}
// Add default account
newHdChain.AddAccount();
// Encryption routine if vMasterKey has been supplied
if (vMasterKeyOpt.has_value()) {
auto vMasterKey = vMasterKeyOpt.value();
if (vMasterKey.size() != WALLET_CRYPTO_KEY_SIZE) {
throw std::runtime_error(strprintf("%s : invalid vMasterKey size, got %zd (expected %lld)", __func__, vMasterKey.size(), WALLET_CRYPTO_KEY_SIZE));
}
// Maintain an unencrypted copy of the chain for sanity checking
CHDChain prevHdChain{newHdChain};
bool res = EncryptHDChain(vMasterKey, newHdChain);
assert(res);
res = LoadHDChain(newHdChain);
assert(res);
res = GetHDChain(newHdChain);
assert(res);
// IDs should match, seed hashes should not
assert(prevHdChain.GetID() == newHdChain.GetID());
assert(prevHdChain.GetSeedHash() != newHdChain.GetSeedHash());
}
if (!AddHDChainSingle(newHdChain)) {
throw std::runtime_error(std::string(__func__) + ": AddHDChainSingle failed");
}
if (!NewKeyPool()) {
throw std::runtime_error(std::string(__func__) + ": NewKeyPool failed");
}
}
bool LegacyScriptPubKeyMan::LoadHDChain(const CHDChain& chain)
{
LOCK(cs_KeyStore);
if (m_storage.HasEncryptionKeys() != chain.IsCrypted()) return false;
m_hd_chain = chain;
return true;
}
bool LegacyScriptPubKeyMan::AddHDChain(WalletBatch &batch, const CHDChain& chain)
{
LOCK(cs_KeyStore);
if (!LoadHDChain(chain))
return false;
{
if (chain.IsCrypted() && encrypted_batch) {
if (!encrypted_batch->WriteHDChain(chain))
throw std::runtime_error(std::string(__func__) + ": WriteHDChain failed for encrypted batch");
} else {
if (!batch.WriteHDChain(chain)) {
throw std::runtime_error(std::string(__func__) + ": WriteHDChain failed");
}
}
m_storage.UnsetBlankWalletFlag(batch);
}
return true;
}
bool LegacyScriptPubKeyMan::AddHDChainSingle(const CHDChain& chain)
{
WalletBatch batch(m_storage.GetDatabase());
return AddHDChain(batch, chain);
}
bool LegacyScriptPubKeyMan::GetDecryptedHDChain(CHDChain& hdChainRet) const
{
LOCK(cs_KeyStore);
CHDChain hdChainTmp;
if (!GetHDChain(hdChainTmp)) {
return false;
}
if (!m_storage.WithEncryptionKey([&](const CKeyingMaterial& encryption_key) {
return DecryptHDChain(encryption_key, hdChainTmp);
})) {
return false;
}
// make sure seed matches this chain
if (hdChainTmp.GetID() != hdChainTmp.GetSeedHash())
return false;
hdChainRet = hdChainTmp;
return true;
}
bool LegacyScriptPubKeyMan::EncryptHDChain(const CKeyingMaterial& vMasterKeyIn, CHDChain& chain)
{
LOCK(cs_KeyStore);
// should call EncryptKeys first
if (!m_storage.HasEncryptionKeys())
return false;
if (chain.IsCrypted())
return true;
// make sure seed matches this chain
if (chain.GetID() != chain.GetSeedHash())
return false;
std::vector<unsigned char> vchCryptedSeed;
if (!EncryptSecret(vMasterKeyIn, chain.GetSeed(), chain.GetID(), vchCryptedSeed))
return false;
CHDChain cryptedChain = chain;
cryptedChain.SetCrypted(true);
SecureVector vchSecureCryptedSeed(vchCryptedSeed.begin(), vchCryptedSeed.end());
if (!cryptedChain.SetSeed(vchSecureCryptedSeed, false))
return false;
SecureVector vchMnemonic;
SecureVector vchMnemonicPassphrase;
// it's ok to have no mnemonic if wallet was initialized via hdseed
if (chain.GetMnemonic(vchMnemonic, vchMnemonicPassphrase)) {
std::vector<unsigned char> vchCryptedMnemonic;
std::vector<unsigned char> vchCryptedMnemonicPassphrase;
if (!vchMnemonic.empty() && !EncryptSecret(vMasterKeyIn, vchMnemonic, chain.GetID(), vchCryptedMnemonic))
return false;
if (!vchMnemonicPassphrase.empty() && !EncryptSecret(vMasterKeyIn, vchMnemonicPassphrase, chain.GetID(), vchCryptedMnemonicPassphrase))
return false;
SecureVector vchSecureCryptedMnemonic(vchCryptedMnemonic.begin(), vchCryptedMnemonic.end());
SecureVector vchSecureCryptedMnemonicPassphrase(vchCryptedMnemonicPassphrase.begin(), vchCryptedMnemonicPassphrase.end());
if (!cryptedChain.SetMnemonic(vchSecureCryptedMnemonic, vchSecureCryptedMnemonicPassphrase, false))
return false;
}
chain = cryptedChain;
return true;
}
bool LegacyScriptPubKeyMan::DecryptHDChain(const CKeyingMaterial& vMasterKeyIn, CHDChain& hdChainRet) const
{
LOCK(cs_KeyStore);
if (!m_storage.HasEncryptionKeys())
return true;
if (m_hd_chain.IsNull())
return false;
if (!m_hd_chain.IsCrypted())
return false;
SecureVector vchSecureSeed;
SecureVector vchSecureCryptedSeed = m_hd_chain.GetSeed();
std::vector<unsigned char> vchCryptedSeed(vchSecureCryptedSeed.begin(), vchSecureCryptedSeed.end());
if (!DecryptSecret(vMasterKeyIn, vchCryptedSeed, m_hd_chain.GetID(), vchSecureSeed))
return false;
hdChainRet = m_hd_chain;
if (!hdChainRet.SetSeed(vchSecureSeed, false))
return false;
// hash of decrypted seed must match chain id
if (hdChainRet.GetSeedHash() != m_hd_chain.GetID())
return false;
SecureVector vchSecureCryptedMnemonic;
SecureVector vchSecureCryptedMnemonicPassphrase;
// it's ok to have no mnemonic if wallet was initialized via hdseed
if (m_hd_chain.GetMnemonic(vchSecureCryptedMnemonic, vchSecureCryptedMnemonicPassphrase)) {
SecureVector vchSecureMnemonic;
SecureVector vchSecureMnemonicPassphrase;
std::vector<unsigned char> vchCryptedMnemonic(vchSecureCryptedMnemonic.begin(), vchSecureCryptedMnemonic.end());
std::vector<unsigned char> vchCryptedMnemonicPassphrase(vchSecureCryptedMnemonicPassphrase.begin(), vchSecureCryptedMnemonicPassphrase.end());
if (!vchCryptedMnemonic.empty() && !DecryptSecret(vMasterKeyIn, vchCryptedMnemonic, m_hd_chain.GetID(), vchSecureMnemonic))
return false;
if (!vchCryptedMnemonicPassphrase.empty() && !DecryptSecret(vMasterKeyIn, vchCryptedMnemonicPassphrase, m_hd_chain.GetID(), vchSecureMnemonicPassphrase))
return false;
if (!hdChainRet.SetMnemonic(vchSecureMnemonic, vchSecureMnemonicPassphrase, false))
return false;
}
hdChainRet.SetCrypted(false);
return true;
}
bool LegacyScriptPubKeyMan::IsHDEnabled() const
{
CHDChain hdChainCurrent;
return GetHDChain(hdChainCurrent);
}
bool LegacyScriptPubKeyMan::CanGetAddresses(bool internal) const
{
LOCK(cs_KeyStore);
// Check if the keypool has keys
bool keypool_has_keys;
if (internal) {
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::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()) {
// if the keypool is empty, return <NOW>
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());
int64_t oldestKey = GetOldestKeyTimeInPool(setExternalKeyPool, batch);
if (IsHDEnabled()) {
oldestKey = std::max(GetOldestKeyTimeInPool(setInternalKeyPool, batch), oldestKey);
}
return oldestKey;
}
size_t LegacyScriptPubKeyMan::KeypoolCountExternalKeys() const
{
LOCK(cs_KeyStore);
return setExternalKeyPool.size();
}
unsigned int LegacyScriptPubKeyMan::GetKeyPoolSize() const
{
LOCK(cs_KeyStore);
return setInternalKeyPool.size() + setExternalKeyPool.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;
}
bool LegacyScriptPubKeyMan::SignSpecialTxPayload(const uint256& hash, const CKeyID& keyid, std::vector<unsigned char>& vchSig) const
{
CKey key;
if (!GetKey(keyid, key)) {
return false;
}
return CHashSigner::SignHash(hash, key, vchSig);
}
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 {
// There's no UTXO so we can just skip this now
continue;
}
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(true)) {
return false;
}
std::vector<unsigned char> vchCryptedSecret;
CKeyingMaterial vchSecret(key.begin(), key.end());
if (!m_storage.WithEncryptionKey([&](const CKeyingMaterial& encryption_key) {
return EncryptSecret(encryption_key, vchSecret, pubkey.GetHash(), vchCryptedSecret);
})) {
return false;
}
if (!AddCryptedKey(pubkey, vchCryptedSecret)) {
return false;
}
return true;
}
bool LegacyScriptPubKeyMan::GetKeyInner(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 m_storage.WithEncryptionKey([&](const CKeyingMaterial& encryption_key) {
return DecryptKey(encryption_key, vchCryptedSecret, vchPubKey, keyOut);
});
}
return false;
}
bool LegacyScriptPubKeyMan::GetPubKeyInner(const CKeyID &address, CPubKey& vchPubKeyOut) const
{
LOCK(cs_KeyStore);
if (!m_storage.HasEncryptionKeys()) {
if (!FillableSigningProvider::GetPubKey(address, vchPubKeyOut)) {
return GetWatchPubKey(address, vchPubKeyOut);
}
return true;
}
CryptedKeyMap::const_iterator mi = mapCryptedKeys.find(address);
if (mi != mapCryptedKeys.end())
{
vchPubKeyOut = (*mi).second.first;
return true;
}
// Check for watch-only pubkeys
return GetWatchPubKey(address, vchPubKeyOut);
}
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::HaveKeyInner(const CKeyID &address) const
{
LOCK(cs_KeyStore);
if (!m_storage.HasEncryptionKeys()) {
return FillableSigningProvider::HaveKey(address);
}
return mapCryptedKeys.count(address) > 0;
}
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);
return true;
}
bool LegacyScriptPubKeyMan::AddCryptedKey(const CPubKey &vchPubKey,
const std::vector<unsigned char> &vchCryptedSecret)
{
if (!AddCryptedKeyInner(vchPubKey, vchCryptedSecret))