diff --git a/src/main.cpp b/src/main.cpp index 7f48ccbae..3cb476f95 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -1492,13 +1492,13 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState& state, const C // Check against previous transactions // This is done last to help prevent CPU exhaustion denial-of-service attacks. - CachedHashes cachedHashes(tx); - if (!CheckInputs(tx, state, view, true, scriptVerifyFlags, true, cachedHashes)) { + PrecomputedTransactionData txdata(tx); + if (!CheckInputs(tx, state, view, true, scriptVerifyFlags, true, txdata)) { // SCRIPT_VERIFY_CLEANSTACK requires SCRIPT_VERIFY_WITNESS, so we // need to turn both off, and compare against just turning off CLEANSTACK // to see if the failure is specifically due to witness validation. - if (CheckInputs(tx, state, view, true, scriptVerifyFlags & ~(SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_CLEANSTACK), true, cachedHashes) && - !CheckInputs(tx, state, view, true, scriptVerifyFlags & ~SCRIPT_VERIFY_CLEANSTACK, true, cachedHashes)) { + if (CheckInputs(tx, state, view, true, scriptVerifyFlags & ~(SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_CLEANSTACK), true, txdata) && + !CheckInputs(tx, state, view, true, scriptVerifyFlags & ~SCRIPT_VERIFY_CLEANSTACK, true, txdata)) { // Only the witness is wrong, so the transaction itself may be fine. state.SetCorruptionPossible(); } @@ -1514,7 +1514,7 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState& state, const C // There is a similar check in CreateNewBlock() to prevent creating // invalid blocks, however allowing such transactions into the mempool // can be exploited as a DoS attack. - if (!CheckInputs(tx, state, view, true, MANDATORY_SCRIPT_VERIFY_FLAGS, true, cachedHashes)) + if (!CheckInputs(tx, state, view, true, MANDATORY_SCRIPT_VERIFY_FLAGS, true, txdata)) { return error("%s: BUG! PLEASE REPORT THIS! ConnectInputs failed against MANDATORY but not STANDARD flags %s, %s", __func__, hash.ToString(), FormatStateMessage(state)); @@ -1911,7 +1911,7 @@ void UpdateCoins(const CTransaction& tx, CCoinsViewCache& inputs, int nHeight) bool CScriptCheck::operator()() { const CScript &scriptSig = ptxTo->vin[nIn].scriptSig; const CScriptWitness *witness = (nIn < ptxTo->wit.vtxinwit.size()) ? &ptxTo->wit.vtxinwit[nIn].scriptWitness : NULL; - if (!VerifyScript(scriptSig, scriptPubKey, witness, nFlags, CachingTransactionSignatureChecker(ptxTo, nIn, amount, cacheStore, *cachedHashes), &error)) { + if (!VerifyScript(scriptSig, scriptPubKey, witness, nFlags, CachingTransactionSignatureChecker(ptxTo, nIn, amount, cacheStore, *txdata), &error)) { return false; } return true; @@ -1970,7 +1970,7 @@ bool CheckTxInputs(const CTransaction& tx, CValidationState& state, const CCoins } }// namespace Consensus -bool CheckInputs(const CTransaction& tx, CValidationState &state, const CCoinsViewCache &inputs, bool fScriptChecks, unsigned int flags, bool cacheStore, CachedHashes& cachedHashes, std::vector *pvChecks) +bool CheckInputs(const CTransaction& tx, CValidationState &state, const CCoinsViewCache &inputs, bool fScriptChecks, unsigned int flags, bool cacheStore, PrecomputedTransactionData& txdata, std::vector *pvChecks) { if (!tx.IsCoinBase()) { @@ -1997,7 +1997,7 @@ bool CheckInputs(const CTransaction& tx, CValidationState &state, const CCoinsVi assert(coins); // Verify signature - CScriptCheck check(*coins, tx, i, flags, cacheStore, &cachedHashes); + CScriptCheck check(*coins, tx, i, flags, cacheStore, &txdata); if (pvChecks) { pvChecks->push_back(CScriptCheck()); check.swap(pvChecks->back()); @@ -2010,7 +2010,7 @@ bool CheckInputs(const CTransaction& tx, CValidationState &state, const CCoinsVi // avoid splitting the network between upgraded and // non-upgraded nodes. CScriptCheck check2(*coins, tx, i, - flags & ~STANDARD_NOT_MANDATORY_VERIFY_FLAGS, cacheStore, &cachedHashes); + flags & ~STANDARD_NOT_MANDATORY_VERIFY_FLAGS, cacheStore, &txdata); if (check2()) return state.Invalid(false, REJECT_NONSTANDARD, strprintf("non-mandatory-script-verify-flag (%s)", ScriptErrorString(check.GetScriptError()))); } @@ -2406,8 +2406,8 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin std::vector > vPos; vPos.reserve(block.vtx.size()); blockundo.vtxundo.reserve(block.vtx.size() - 1); - std::vector cachedHashes; - cachedHashes.reserve(block.vtx.size()); // Required so that pointers to individual CachedHashes don't get invalidated + std::vector txdata; + txdata.reserve(block.vtx.size()); // Required so that pointers to individual PrecomputedTransactionData don't get invalidated for (unsigned int i = 0; i < block.vtx.size(); i++) { const CTransaction &tx = block.vtx[i]; @@ -2454,14 +2454,14 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin return state.DoS(100, error("ConnectBlock(): too many sigops"), REJECT_INVALID, "bad-blk-sigops"); - cachedHashes.emplace_back(tx); + txdata.emplace_back(tx); if (!tx.IsCoinBase()) { nFees += view.GetValueIn(tx)-tx.GetValueOut(); std::vector vChecks; bool fCacheResults = fJustCheck; /* Don't cache results if we're actually connecting blocks (still consult the cache, though) */ - if (!CheckInputs(tx, state, view, fScriptChecks, flags, fCacheResults, cachedHashes[i], nScriptCheckThreads ? &vChecks : NULL)) + if (!CheckInputs(tx, state, view, fScriptChecks, flags, fCacheResults, txdata[i], nScriptCheckThreads ? &vChecks : NULL)) return error("ConnectBlock(): CheckInputs on %s failed with %s", tx.GetHash().ToString(), FormatStateMessage(state)); control.Add(vChecks); diff --git a/src/main.h b/src/main.h index fbf66c048..1c374c8a0 100644 --- a/src/main.h +++ b/src/main.h @@ -38,7 +38,7 @@ class CScriptCheck; class CTxMemPool; class CValidationInterface; class CValidationState; -class CachedHashes; +class PrecomputedTransactionData; struct CNodeStateStats; struct LockPoints; @@ -348,7 +348,7 @@ int64_t GetTransactionSigOpCost(const CTransaction& tx, const CCoinsViewCache& i * instead of being performed inline. */ bool CheckInputs(const CTransaction& tx, CValidationState &state, const CCoinsViewCache &view, bool fScriptChecks, - unsigned int flags, bool cacheStore, CachedHashes& cachedHashes, std::vector *pvChecks = NULL); + unsigned int flags, bool cacheStore, PrecomputedTransactionData& txdata, std::vector *pvChecks = NULL); /** Apply the effects of this transaction on the UTXO set represented by view */ void UpdateCoins(const CTransaction& tx, CCoinsViewCache& inputs, int nHeight); @@ -422,13 +422,13 @@ private: unsigned int nFlags; bool cacheStore; ScriptError error; - CachedHashes *cachedHashes; + PrecomputedTransactionData *txdata; public: CScriptCheck(): amount(0), ptxTo(0), nIn(0), nFlags(0), cacheStore(false), error(SCRIPT_ERR_UNKNOWN_ERROR) {} - CScriptCheck(const CCoins& txFromIn, const CTransaction& txToIn, unsigned int nInIn, unsigned int nFlagsIn, bool cacheIn, CachedHashes* cachedHashesIn) : + CScriptCheck(const CCoins& txFromIn, const CTransaction& txToIn, unsigned int nInIn, unsigned int nFlagsIn, bool cacheIn, PrecomputedTransactionData* txdataIn) : scriptPubKey(txFromIn.vout[txToIn.vin[nInIn].prevout.n].scriptPubKey), amount(txFromIn.vout[txToIn.vin[nInIn].prevout.n].nValue), - ptxTo(&txToIn), nIn(nInIn), nFlags(nFlagsIn), cacheStore(cacheIn), error(SCRIPT_ERR_UNKNOWN_ERROR), cachedHashes(cachedHashesIn) { } + ptxTo(&txToIn), nIn(nInIn), nFlags(nFlagsIn), cacheStore(cacheIn), error(SCRIPT_ERR_UNKNOWN_ERROR), txdata(txdataIn) { } bool operator()(); @@ -440,7 +440,7 @@ public: std::swap(nFlags, check.nFlags); std::swap(cacheStore, check.cacheStore); std::swap(error, check.error); - std::swap(cachedHashes, check.cachedHashes); + std::swap(txdata, check.txdata); } ScriptError GetScriptError() const { return error; } diff --git a/src/script/bitcoinconsensus.cpp b/src/script/bitcoinconsensus.cpp index 01a8babb6..b629f4278 100644 --- a/src/script/bitcoinconsensus.cpp +++ b/src/script/bitcoinconsensus.cpp @@ -84,8 +84,8 @@ static int verify_script(const unsigned char *scriptPubKey, unsigned int scriptP // Regardless of the verification result, the tx did not error. set_error(err, bitcoinconsensus_ERR_OK); - CachedHashes cachedHashes(tx); - return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), nIn < tx.wit.vtxinwit.size() ? &tx.wit.vtxinwit[nIn].scriptWitness : NULL, flags, TransactionSignatureChecker(&tx, nIn, amount, cachedHashes), NULL); + PrecomputedTransactionData txdata(tx); + return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), nIn < tx.wit.vtxinwit.size() ? &tx.wit.vtxinwit[nIn].scriptWitness : NULL, flags, TransactionSignatureChecker(&tx, nIn, amount, txdata), NULL); } catch (const std::exception&) { return set_error(err, bitcoinconsensus_ERR_TX_DESERIALIZE); // Error deserializing } diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp index 459feaa0f..47ea261e3 100644 --- a/src/script/interpreter.cpp +++ b/src/script/interpreter.cpp @@ -1134,14 +1134,14 @@ uint256 GetOutputsHash(const CTransaction& txTo) { } // anon namespace -CachedHashes::CachedHashes(const CTransaction& txTo) +PrecomputedTransactionData::PrecomputedTransactionData(const CTransaction& txTo) { hashPrevouts = GetPrevoutHash(txTo); hashSequence = GetSequenceHash(txTo); hashOutputs = GetOutputsHash(txTo); } -uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType, const CAmount& amount, SigVersion sigversion, const CachedHashes* cache) +uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType, const CAmount& amount, SigVersion sigversion, const PrecomputedTransactionData* cache) { if (sigversion == SIGVERSION_WITNESS_V0) { uint256 hashPrevouts; @@ -1229,7 +1229,7 @@ bool TransactionSignatureChecker::CheckSig(const vector& vchSigIn int nHashType = vchSig.back(); vchSig.pop_back(); - uint256 sighash = SignatureHash(scriptCode, *txTo, nIn, nHashType, amount, sigversion, this->cachedHashes); + uint256 sighash = SignatureHash(scriptCode, *txTo, nIn, nHashType, amount, sigversion, this->txdata); if (!VerifySignature(vchSig, pubkey, sighash)) return false; diff --git a/src/script/interpreter.h b/src/script/interpreter.h index b4da113ee..e5d7865cd 100644 --- a/src/script/interpreter.h +++ b/src/script/interpreter.h @@ -98,11 +98,11 @@ enum bool CheckSignatureEncoding(const std::vector &vchSig, unsigned int flags, ScriptError* serror); -struct CachedHashes +struct PrecomputedTransactionData { uint256 hashPrevouts, hashSequence, hashOutputs; - CachedHashes(const CTransaction& tx); + PrecomputedTransactionData(const CTransaction& tx); }; enum SigVersion @@ -111,7 +111,7 @@ enum SigVersion SIGVERSION_WITNESS_V0 = 1, }; -uint256 SignatureHash(const CScript &scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType, const CAmount& amount, SigVersion sigversion, const CachedHashes* cache = NULL); +uint256 SignatureHash(const CScript &scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType, const CAmount& amount, SigVersion sigversion, const PrecomputedTransactionData* cache = NULL); class BaseSignatureChecker { @@ -140,14 +140,14 @@ private: const CTransaction* txTo; unsigned int nIn; const CAmount amount; - const CachedHashes* cachedHashes; + const PrecomputedTransactionData* txdata; protected: virtual bool VerifySignature(const std::vector& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const; public: - TransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn) : txTo(txToIn), nIn(nInIn), amount(amountIn), cachedHashes(NULL) {} - TransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, const CachedHashes& cachedHashesIn) : txTo(txToIn), nIn(nInIn), amount(amountIn), cachedHashes(&cachedHashesIn) {} + TransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn) : txTo(txToIn), nIn(nInIn), amount(amountIn), txdata(NULL) {} + TransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, const PrecomputedTransactionData& txdataIn) : txTo(txToIn), nIn(nInIn), amount(amountIn), txdata(&txdataIn) {} bool CheckSig(const std::vector& scriptSig, const std::vector& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const; bool CheckLockTime(const CScriptNum& nLockTime) const; bool CheckSequence(const CScriptNum& nSequence) const; diff --git a/src/script/sigcache.h b/src/script/sigcache.h index 551f8b225..44551ec2b 100644 --- a/src/script/sigcache.h +++ b/src/script/sigcache.h @@ -22,7 +22,7 @@ private: bool store; public: - CachingTransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amount, bool storeIn, CachedHashes& cachedHashesIn) : TransactionSignatureChecker(txToIn, nInIn, amount, cachedHashesIn), store(storeIn) {} + CachingTransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amount, bool storeIn, PrecomputedTransactionData& txdataIn) : TransactionSignatureChecker(txToIn, nInIn, amount, txdataIn), store(storeIn) {} bool VerifySignature(const std::vector& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const; }; diff --git a/src/test/script_P2SH_tests.cpp b/src/test/script_P2SH_tests.cpp index 5cd7c9362..1a01593a8 100644 --- a/src/test/script_P2SH_tests.cpp +++ b/src/test/script_P2SH_tests.cpp @@ -108,12 +108,12 @@ BOOST_AUTO_TEST_CASE(sign) // All of the above should be OK, and the txTos have valid signatures // Check to make sure signature verification fails if we use the wrong ScriptSig: for (int i = 0; i < 8; i++) { - CachedHashes cachedHashes(txTo[i]); + PrecomputedTransactionData txdata(txTo[i]); for (int j = 0; j < 8; j++) { CScript sigSave = txTo[i].vin[0].scriptSig; txTo[i].vin[0].scriptSig = txTo[j].vin[0].scriptSig; - bool sigOK = CScriptCheck(CCoins(txFrom, 0), txTo[i], 0, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC, false, &cachedHashes)(); + bool sigOK = CScriptCheck(CCoins(txFrom, 0), txTo[i], 0, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC, false, &txdata)(); if (i == j) BOOST_CHECK_MESSAGE(sigOK, strprintf("VerifySignature %d %d", i, j)); else diff --git a/src/test/transaction_tests.cpp b/src/test/transaction_tests.cpp index 8f8666c76..b5af400bc 100644 --- a/src/test/transaction_tests.cpp +++ b/src/test/transaction_tests.cpp @@ -154,7 +154,7 @@ BOOST_AUTO_TEST_CASE(tx_valid) BOOST_CHECK_MESSAGE(CheckTransaction(tx, state), strTest); BOOST_CHECK(state.IsValid()); - CachedHashes cachedHashes(tx); + PrecomputedTransactionData txdata(tx); for (unsigned int i = 0; i < tx.vin.size(); i++) { if (!mapprevOutScriptPubKeys.count(tx.vin[i].prevout)) @@ -170,7 +170,7 @@ BOOST_AUTO_TEST_CASE(tx_valid) unsigned int verify_flags = ParseScriptFlags(test[2].get_str()); const CScriptWitness *witness = (i < tx.wit.vtxinwit.size()) ? &tx.wit.vtxinwit[i].scriptWitness : NULL; BOOST_CHECK_MESSAGE(VerifyScript(tx.vin[i].scriptSig, mapprevOutScriptPubKeys[tx.vin[i].prevout], - witness, verify_flags, TransactionSignatureChecker(&tx, i, amount, cachedHashes), &err), + witness, verify_flags, TransactionSignatureChecker(&tx, i, amount, txdata), &err), strTest); BOOST_CHECK_MESSAGE(err == SCRIPT_ERR_OK, ScriptErrorString(err)); } @@ -239,7 +239,7 @@ BOOST_AUTO_TEST_CASE(tx_invalid) CValidationState state; fValid = CheckTransaction(tx, state) && state.IsValid(); - CachedHashes cachedHashes(tx); + PrecomputedTransactionData txdata(tx); for (unsigned int i = 0; i < tx.vin.size() && fValid; i++) { if (!mapprevOutScriptPubKeys.count(tx.vin[i].prevout)) @@ -255,7 +255,7 @@ BOOST_AUTO_TEST_CASE(tx_invalid) } const CScriptWitness *witness = (i < tx.wit.vtxinwit.size()) ? &tx.wit.vtxinwit[i].scriptWitness : NULL; fValid = VerifyScript(tx.vin[i].scriptSig, mapprevOutScriptPubKeys[tx.vin[i].prevout], - witness, verify_flags, TransactionSignatureChecker(&tx, i, amount, cachedHashes), &err); + witness, verify_flags, TransactionSignatureChecker(&tx, i, amount, txdata), &err); } BOOST_CHECK_MESSAGE(!fValid, strTest); BOOST_CHECK_MESSAGE(err != SCRIPT_ERR_OK, ScriptErrorString(err)); @@ -469,7 +469,7 @@ BOOST_AUTO_TEST_CASE(test_big_witness_transaction) { WithOrVersion(&ssout, 0) >> tx; // check all inputs concurrently, with the cache - CachedHashes cachedHashes(tx); + PrecomputedTransactionData txdata(tx); boost::thread_group threadGroup; CCheckQueue scriptcheckqueue(128); CCheckQueueControl control(&scriptcheckqueue); @@ -489,7 +489,7 @@ BOOST_AUTO_TEST_CASE(test_big_witness_transaction) { for(uint32_t i = 0; i < mtx.vin.size(); i++) { std::vector vChecks; - CScriptCheck check(coins, tx, i, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS, false, &cachedHashes); + CScriptCheck check(coins, tx, i, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS, false, &txdata); vChecks.push_back(CScriptCheck()); check.swap(vChecks.back()); control.Add(vChecks);