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Avoid storing a reference passed to SignatureChecker constructors

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This commit is contained in:
Pieter Wuille 2015-01-27 10:01:31 -04:00
parent 858809a33e
commit 9fddceda44
12 changed files with 36 additions and 36 deletions
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2
src/bitcoin-tx.cpp
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@ -436,7 +436,7 @@ static void MutateTxSign(CMutableTransaction& tx, const string& flagStr)
BOOST_FOREACH(const CTransaction& txv, txVariants) {
txin.scriptSig = CombineSignatures(prevPubKey, mergedTx, i, txin.scriptSig, txv.vin[i].scriptSig);
}
if (!VerifyScript(txin.scriptSig, prevPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(mergedTx, i)))
if (!VerifyScript(txin.scriptSig, prevPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(&mergedTx, i)))
fComplete = false;
}

2
src/main.cpp
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@ -1422,7 +1422,7 @@ void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCach
bool CScriptCheck::operator()() {
const CScript &scriptSig = ptxTo->vin[nIn].scriptSig;
if (!VerifyScript(scriptSig, scriptPubKey, nFlags, CachingTransactionSignatureChecker(*ptxTo, nIn, cacheStore), &error)) {
if (!VerifyScript(scriptSig, scriptPubKey, nFlags, CachingTransactionSignatureChecker(ptxTo, nIn, cacheStore), &error)) {
return ::error("CScriptCheck(): %s:%d VerifySignature failed: %s", ptxTo->GetHash().ToString(), nIn, ScriptErrorString(error));
}
return true;

2
src/rpcrawtransaction.cpp
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@ -688,7 +688,7 @@ Value signrawtransaction(const Array& params, bool fHelp)
BOOST_FOREACH(const CMutableTransaction& txv, txVariants) {
txin.scriptSig = CombineSignatures(prevPubKey, mergedTx, i, txin.scriptSig, txv.vin[i].scriptSig);
}
if (!VerifyScript(txin.scriptSig, prevPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(mergedTx, i)))
if (!VerifyScript(txin.scriptSig, prevPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(&mergedTx, i)))
fComplete = false;
}

2
src/script/bitcoinconsensus.cpp
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@ -78,7 +78,7 @@ int bitcoinconsensus_verify_script(const unsigned char *scriptPubKey, unsigned i
// Regardless of the verification result, the tx did not error.
set_error(err, bitcoinconsensus_ERR_OK);
return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), flags, TransactionSignatureChecker(tx, nIn), NULL);
return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), flags, TransactionSignatureChecker(&tx, nIn), NULL);
} catch (const std::exception&) {
return set_error(err, bitcoinconsensus_ERR_TX_DESERIALIZE); // Error deserializing
}

2
src/script/interpreter.cpp
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@ -1076,7 +1076,7 @@ bool TransactionSignatureChecker::CheckSig(const vector<unsigned char>& vchSigIn
int nHashType = vchSig.back();
vchSig.pop_back();
uint256 sighash = SignatureHash(scriptCode, txTo, nIn, nHashType);
uint256 sighash = SignatureHash(scriptCode, *txTo, nIn, nHashType);
if (!VerifySignature(vchSig, pubkey, sighash))
return false;

6
src/script/interpreter.h
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@ -94,14 +94,14 @@ public:
class TransactionSignatureChecker : public BaseSignatureChecker
{
private:
const CTransaction& txTo;
const CTransaction* txTo;
unsigned int nIn;
protected:
virtual bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const;
public:
TransactionSignatureChecker(const CTransaction& txToIn, unsigned int nInIn) : txTo(txToIn), nIn(nInIn) {}
TransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn) : txTo(txToIn), nIn(nInIn) {}
bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode) const;
};
@ -111,7 +111,7 @@ private:
const CTransaction txTo;
public:
MutableTransactionSignatureChecker(const CMutableTransaction& txToIn, unsigned int nInIn) : TransactionSignatureChecker(txTo, nInIn), txTo(txToIn) {}
MutableTransactionSignatureChecker(const CMutableTransaction* txToIn, unsigned int nInIn) : TransactionSignatureChecker(&txTo, nInIn), txTo(*txToIn) {}
};
bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* error = NULL);

2
src/script/sigcache.h
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@ -18,7 +18,7 @@ private:
bool store;
public:
CachingTransactionSignatureChecker(const CTransaction& txToIn, unsigned int nInIn, bool storeIn=true) : TransactionSignatureChecker(txToIn, nInIn), store(storeIn) {}
CachingTransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, bool storeIn=true) : TransactionSignatureChecker(txToIn, nInIn), store(storeIn) {}
bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const;
};

4
src/script/sign.cpp
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@ -123,7 +123,7 @@ bool SignSignature(const CKeyStore &keystore, const CScript& fromPubKey, CMutabl
}
// Test solution
return VerifyScript(txin.scriptSig, fromPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(txTo, nIn));
return VerifyScript(txin.scriptSig, fromPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(&txTo, nIn));
}
bool SignSignature(const CKeyStore &keystore, const CTransaction& txFrom, CMutableTransaction& txTo, unsigned int nIn, int nHashType)
@ -174,7 +174,7 @@ static CScript CombineMultisig(const CScript& scriptPubKey, const CTransaction&
if (sigs.count(pubkey))
continue; // Already got a sig for this pubkey
if (TransactionSignatureChecker(txTo, nIn).CheckSig(sig, pubkey, scriptPubKey))
if (TransactionSignatureChecker(&txTo, nIn).CheckSig(sig, pubkey, scriptPubKey))
{
sigs[pubkey] = sig;
break;

16
src/test/multisig_tests.cpp
View File

@ -82,20 +82,20 @@ BOOST_AUTO_TEST_CASE(multisig_verify)
keys.assign(1,key[0]);
keys.push_back(key[1]);
s = sign_multisig(a_and_b, keys, txTo[0], 0);
BOOST_CHECK(VerifyScript(s, a_and_b, flags, MutableTransactionSignatureChecker(txTo[0], 0), &err));
BOOST_CHECK(VerifyScript(s, a_and_b, flags, MutableTransactionSignatureChecker(&txTo[0], 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
for (int i = 0; i < 4; i++)
{
keys.assign(1,key[i]);
s = sign_multisig(a_and_b, keys, txTo[0], 0);
BOOST_CHECK_MESSAGE(!VerifyScript(s, a_and_b, flags, MutableTransactionSignatureChecker(txTo[0], 0), &err), strprintf("a&b 1: %d", i));
BOOST_CHECK_MESSAGE(!VerifyScript(s, a_and_b, flags, MutableTransactionSignatureChecker(&txTo[0], 0), &err), strprintf("a&b 1: %d", i));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_INVALID_STACK_OPERATION, ScriptErrorString(err));
keys.assign(1,key[1]);
keys.push_back(key[i]);
s = sign_multisig(a_and_b, keys, txTo[0], 0);
BOOST_CHECK_MESSAGE(!VerifyScript(s, a_and_b, flags, MutableTransactionSignatureChecker(txTo[0], 0), &err), strprintf("a&b 2: %d", i));
BOOST_CHECK_MESSAGE(!VerifyScript(s, a_and_b, flags, MutableTransactionSignatureChecker(&txTo[0], 0), &err), strprintf("a&b 2: %d", i));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));
}
@ -106,18 +106,18 @@ BOOST_AUTO_TEST_CASE(multisig_verify)
s = sign_multisig(a_or_b, keys, txTo[1], 0);
if (i == 0 || i == 1)
{
BOOST_CHECK_MESSAGE(VerifyScript(s, a_or_b, flags, MutableTransactionSignatureChecker(txTo[1], 0), &err), strprintf("a|b: %d", i));
BOOST_CHECK_MESSAGE(VerifyScript(s, a_or_b, flags, MutableTransactionSignatureChecker(&txTo[1], 0), &err), strprintf("a|b: %d", i));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
}
else
{
BOOST_CHECK_MESSAGE(!VerifyScript(s, a_or_b, flags, MutableTransactionSignatureChecker(txTo[1], 0), &err), strprintf("a|b: %d", i));
BOOST_CHECK_MESSAGE(!VerifyScript(s, a_or_b, flags, MutableTransactionSignatureChecker(&txTo[1], 0), &err), strprintf("a|b: %d", i));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));
}
}
s.clear();
s << OP_0 << OP_1;
BOOST_CHECK(!VerifyScript(s, a_or_b, flags, MutableTransactionSignatureChecker(txTo[1], 0), &err));
BOOST_CHECK(!VerifyScript(s, a_or_b, flags, MutableTransactionSignatureChecker(&txTo[1], 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_SIG_DER, ScriptErrorString(err));
@ -129,12 +129,12 @@ BOOST_AUTO_TEST_CASE(multisig_verify)
s = sign_multisig(escrow, keys, txTo[2], 0);
if (i < j && i < 3 && j < 3)
{
BOOST_CHECK_MESSAGE(VerifyScript(s, escrow, flags, MutableTransactionSignatureChecker(txTo[2], 0), &err), strprintf("escrow 1: %d %d", i, j));
BOOST_CHECK_MESSAGE(VerifyScript(s, escrow, flags, MutableTransactionSignatureChecker(&txTo[2], 0), &err), strprintf("escrow 1: %d %d", i, j));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
}
else
{
BOOST_CHECK_MESSAGE(!VerifyScript(s, escrow, flags, MutableTransactionSignatureChecker(txTo[2], 0), &err), strprintf("escrow 2: %d %d", i, j));
BOOST_CHECK_MESSAGE(!VerifyScript(s, escrow, flags, MutableTransactionSignatureChecker(&txTo[2], 0), &err), strprintf("escrow 2: %d %d", i, j));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));
}
}

2
src/test/script_P2SH_tests.cpp
View File

@ -43,7 +43,7 @@ Verify(const CScript& scriptSig, const CScript& scriptPubKey, bool fStrict, Scri
txTo.vin[0].scriptSig = scriptSig;
txTo.vout[0].nValue = 1;
return VerifyScript(scriptSig, scriptPubKey, fStrict ? SCRIPT_VERIFY_P2SH : SCRIPT_VERIFY_NONE, MutableTransactionSignatureChecker(txTo, 0), &err);
return VerifyScript(scriptSig, scriptPubKey, fStrict ? SCRIPT_VERIFY_P2SH : SCRIPT_VERIFY_NONE, MutableTransactionSignatureChecker(&txTo, 0), &err);
}

28
src/test/script_tests.cpp
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@ -93,7 +93,7 @@ void DoTest(const CScript& scriptPubKey, const CScript& scriptSig, int flags, bo
ScriptError err;
CMutableTransaction tx = BuildSpendingTransaction(scriptSig, BuildCreditingTransaction(scriptPubKey));
CMutableTransaction tx2 = tx;
BOOST_CHECK_MESSAGE(VerifyScript(scriptSig, scriptPubKey, flags, MutableTransactionSignatureChecker(tx, 0), &err) == expect, message);
BOOST_CHECK_MESSAGE(VerifyScript(scriptSig, scriptPubKey, flags, MutableTransactionSignatureChecker(&tx, 0), &err) == expect, message);
BOOST_CHECK_MESSAGE(expect == (err == SCRIPT_ERR_OK), std::string(ScriptErrorString(err)) + ": " + message);
#if defined(HAVE_CONSENSUS_LIB)
CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
@ -682,18 +682,18 @@ BOOST_AUTO_TEST_CASE(script_CHECKMULTISIG12)
CMutableTransaction txTo12 = BuildSpendingTransaction(CScript(), txFrom12);
CScript goodsig1 = sign_multisig(scriptPubKey12, key1, txTo12);
BOOST_CHECK(VerifyScript(goodsig1, scriptPubKey12, flags, MutableTransactionSignatureChecker(txTo12, 0), &err));
BOOST_CHECK(VerifyScript(goodsig1, scriptPubKey12, flags, MutableTransactionSignatureChecker(&txTo12, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
txTo12.vout[0].nValue = 2;
BOOST_CHECK(!VerifyScript(goodsig1, scriptPubKey12, flags, MutableTransactionSignatureChecker(txTo12, 0), &err));
BOOST_CHECK(!VerifyScript(goodsig1, scriptPubKey12, flags, MutableTransactionSignatureChecker(&txTo12, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));
CScript goodsig2 = sign_multisig(scriptPubKey12, key2, txTo12);
BOOST_CHECK(VerifyScript(goodsig2, scriptPubKey12, flags, MutableTransactionSignatureChecker(txTo12, 0), &err));
BOOST_CHECK(VerifyScript(goodsig2, scriptPubKey12, flags, MutableTransactionSignatureChecker(&txTo12, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
CScript badsig1 = sign_multisig(scriptPubKey12, key3, txTo12);
BOOST_CHECK(!VerifyScript(badsig1, scriptPubKey12, flags, MutableTransactionSignatureChecker(txTo12, 0), &err));
BOOST_CHECK(!VerifyScript(badsig1, scriptPubKey12, flags, MutableTransactionSignatureChecker(&txTo12, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));
}
@ -715,54 +715,54 @@ BOOST_AUTO_TEST_CASE(script_CHECKMULTISIG23)
std::vector<CKey> keys;
keys.push_back(key1); keys.push_back(key2);
CScript goodsig1 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(VerifyScript(goodsig1, scriptPubKey23, flags, MutableTransactionSignatureChecker(txTo23, 0), &err));
BOOST_CHECK(VerifyScript(goodsig1, scriptPubKey23, flags, MutableTransactionSignatureChecker(&txTo23, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
keys.clear();
keys.push_back(key1); keys.push_back(key3);
CScript goodsig2 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(VerifyScript(goodsig2, scriptPubKey23, flags, MutableTransactionSignatureChecker(txTo23, 0), &err));
BOOST_CHECK(VerifyScript(goodsig2, scriptPubKey23, flags, MutableTransactionSignatureChecker(&txTo23, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
keys.clear();
keys.push_back(key2); keys.push_back(key3);
CScript goodsig3 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(VerifyScript(goodsig3, scriptPubKey23, flags, MutableTransactionSignatureChecker(txTo23, 0), &err));
BOOST_CHECK(VerifyScript(goodsig3, scriptPubKey23, flags, MutableTransactionSignatureChecker(&txTo23, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
keys.clear();
keys.push_back(key2); keys.push_back(key2); // Can't re-use sig
CScript badsig1 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig1, scriptPubKey23, flags, MutableTransactionSignatureChecker(txTo23, 0), &err));
BOOST_CHECK(!VerifyScript(badsig1, scriptPubKey23, flags, MutableTransactionSignatureChecker(&txTo23, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));
keys.clear();
keys.push_back(key2); keys.push_back(key1); // sigs must be in correct order
CScript badsig2 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig2, scriptPubKey23, flags, MutableTransactionSignatureChecker(txTo23, 0), &err));
BOOST_CHECK(!VerifyScript(badsig2, scriptPubKey23, flags, MutableTransactionSignatureChecker(&txTo23, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));
keys.clear();
keys.push_back(key3); keys.push_back(key2); // sigs must be in correct order
CScript badsig3 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig3, scriptPubKey23, flags, MutableTransactionSignatureChecker(txTo23, 0), &err));
BOOST_CHECK(!VerifyScript(badsig3, scriptPubKey23, flags, MutableTransactionSignatureChecker(&txTo23, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));
keys.clear();
keys.push_back(key4); keys.push_back(key2); // sigs must match pubkeys
CScript badsig4 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig4, scriptPubKey23, flags, MutableTransactionSignatureChecker(txTo23, 0), &err));
BOOST_CHECK(!VerifyScript(badsig4, scriptPubKey23, flags, MutableTransactionSignatureChecker(&txTo23, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));
keys.clear();
keys.push_back(key1); keys.push_back(key4); // sigs must match pubkeys
CScript badsig5 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig5, scriptPubKey23, flags, MutableTransactionSignatureChecker(txTo23, 0), &err));
BOOST_CHECK(!VerifyScript(badsig5, scriptPubKey23, flags, MutableTransactionSignatureChecker(&txTo23, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_EVAL_FALSE, ScriptErrorString(err));
keys.clear(); // Must have signatures
CScript badsig6 = sign_multisig(scriptPubKey23, keys, txTo23);
BOOST_CHECK(!VerifyScript(badsig6, scriptPubKey23, flags, MutableTransactionSignatureChecker(txTo23, 0), &err));
BOOST_CHECK(!VerifyScript(badsig6, scriptPubKey23, flags, MutableTransactionSignatureChecker(&txTo23, 0), &err));
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_INVALID_STACK_OPERATION, ScriptErrorString(err));
}

4
src/test/transaction_tests.cpp
View File

@ -145,7 +145,7 @@ BOOST_AUTO_TEST_CASE(tx_valid)
unsigned int verify_flags = ParseScriptFlags(test[2].get_str());
BOOST_CHECK_MESSAGE(VerifyScript(tx.vin[i].scriptSig, mapprevOutScriptPubKeys[tx.vin[i].prevout],
verify_flags, TransactionSignatureChecker(tx, i), &err),
verify_flags, TransactionSignatureChecker(&tx, i), &err),
strTest);
BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err));
}
@ -220,7 +220,7 @@ BOOST_AUTO_TEST_CASE(tx_invalid)
unsigned int verify_flags = ParseScriptFlags(test[2].get_str());
fValid = VerifyScript(tx.vin[i].scriptSig, mapprevOutScriptPubKeys[tx.vin[i].prevout],
verify_flags, TransactionSignatureChecker(tx, i), &err);
verify_flags, TransactionSignatureChecker(&tx, i), &err);
}
BOOST_CHECK_MESSAGE(!fValid, strTest);
BOOST_CHECK_MESSAGE(err != SCRIPT_ERR_OK, ScriptErrorString(err));