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Merge pull request #5394
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307f7d4 Report script evaluation failures in log and reject messages (Pieter Wuille)
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@laanwj
laanwj committed Dec 4, 2014
2 parents 4d2ecc4 + 307f7d4 commit 9ddc8c6
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Showing 2 changed files with 19 additions and 12 deletions.
19 changes: 10 additions & 9 deletions src/main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1334,7 +1334,7 @@ void static InvalidBlockFound(CBlockIndex *pindex, const CValidationState &state
if (state.IsInvalid(nDoS)) {
std::map<uint256, NodeId>::iterator it = mapBlockSource.find(pindex->GetBlockHash());
if (it != mapBlockSource.end() && State(it->second)) {
CBlockReject reject = {state.GetRejectCode(), state.GetRejectReason(), pindex->GetBlockHash()};
CBlockReject reject = {state.GetRejectCode(), state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), pindex->GetBlockHash()};
State(it->second)->rejects.push_back(reject);
if (nDoS > 0)
Misbehaving(it->second, nDoS);
Expand Down Expand Up @@ -1364,10 +1364,11 @@ void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCach
inputs.ModifyCoins(tx.GetHash())->FromTx(tx, nHeight);
}

bool CScriptCheck::operator()() const {
bool CScriptCheck::operator()() {
const CScript &scriptSig = ptxTo->vin[nIn].scriptSig;
if (!VerifyScript(scriptSig, scriptPubKey, nFlags, CachingSignatureChecker(*ptxTo, nIn, cacheStore)))
return error("CScriptCheck() : %s:%d VerifySignature failed", ptxTo->GetHash().ToString(), nIn);
if (!VerifyScript(scriptSig, scriptPubKey, nFlags, CachingSignatureChecker(*ptxTo, nIn, cacheStore), &error)) {
return ::error("CScriptCheck() : %s:%d VerifySignature failed: %s", ptxTo->GetHash().ToString(), nIn, ScriptErrorString(error));
}
return true;
}

Expand Down Expand Up @@ -1455,7 +1456,7 @@ bool CheckInputs(const CTransaction& tx, CValidationState &state, const CCoinsVi
CScriptCheck check(*coins, tx, i,
flags & ~STANDARD_NOT_MANDATORY_VERIFY_FLAGS, cacheStore);
if (check())
return state.Invalid(false, REJECT_NONSTANDARD, "non-mandatory-script-verify-flag");
return state.Invalid(false, REJECT_NONSTANDARD, strprintf("non-mandatory-script-verify-flag (%s)", ScriptErrorString(check.GetScriptError())));
}
// Failures of other flags indicate a transaction that is
// invalid in new blocks, e.g. a invalid P2SH. We DoS ban
Expand All @@ -1464,7 +1465,7 @@ bool CheckInputs(const CTransaction& tx, CValidationState &state, const CCoinsVi
// as to the correct behavior - we may want to continue
// peering with non-upgraded nodes even after a soft-fork
// super-majority vote has passed.
return state.DoS(100,false, REJECT_INVALID, "mandatory-script-verify-flag-failed");
return state.DoS(100,false, REJECT_INVALID, strprintf("mandatory-script-verify-flag-failed (%s)", ScriptErrorString(check.GetScriptError())));
}
}
}
Expand Down Expand Up @@ -3990,7 +3991,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
pfrom->id, pfrom->cleanSubVer,
state.GetRejectReason());
pfrom->PushMessage("reject", strCommand, state.GetRejectCode(),
state.GetRejectReason(), inv.hash);
state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash);
if (nDoS > 0)
Misbehaving(pfrom->GetId(), nDoS);
}
Expand Down Expand Up @@ -4064,7 +4065,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
int nDoS;
if (state.IsInvalid(nDoS)) {
pfrom->PushMessage("reject", strCommand, state.GetRejectCode(),
state.GetRejectReason(), inv.hash);
state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash);
if (nDoS > 0) {
LOCK(cs_main);
Misbehaving(pfrom->GetId(), nDoS);
Expand Down Expand Up @@ -4271,7 +4272,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
if (fDebug) {
try {
string strMsg; unsigned char ccode; string strReason;
vRecv >> LIMITED_STRING(strMsg, CMessageHeader::COMMAND_SIZE) >> ccode >> LIMITED_STRING(strReason, 111);
vRecv >> LIMITED_STRING(strMsg, CMessageHeader::COMMAND_SIZE) >> ccode >> LIMITED_STRING(strReason, MAX_REJECT_MESSAGE_LENGTH);

ostringstream ss;
ss << strMsg << " code " << itostr(ccode) << ": " << strReason;
Expand Down
12 changes: 9 additions & 3 deletions src/main.h
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Original file line number Diff line number Diff line change
Expand Up @@ -96,6 +96,8 @@ static const unsigned int MAX_HEADERS_RESULTS = 2000;
static const unsigned int BLOCK_DOWNLOAD_WINDOW = 1024;
/** Time to wait (in seconds) between writing blockchain state to disk. */
static const unsigned int DATABASE_WRITE_INTERVAL = 3600;
/** Maximum length of reject messages. */
static const unsigned int MAX_REJECT_MESSAGE_LENGTH = 111;

/** "reject" message codes */
static const unsigned char REJECT_MALFORMED = 0x01;
Expand Down Expand Up @@ -334,22 +336,26 @@ class CScriptCheck
unsigned int nIn;
unsigned int nFlags;
bool cacheStore;
ScriptError error;

public:
CScriptCheck(): ptxTo(0), nIn(0), nFlags(0), cacheStore(false) {}
CScriptCheck(): 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) :
scriptPubKey(txFromIn.vout[txToIn.vin[nInIn].prevout.n].scriptPubKey),
ptxTo(&txToIn), nIn(nInIn), nFlags(nFlagsIn), cacheStore(cacheIn) { }
ptxTo(&txToIn), nIn(nInIn), nFlags(nFlagsIn), cacheStore(cacheIn), error(SCRIPT_ERR_UNKNOWN_ERROR) { }

bool operator()() const;
bool operator()();

void swap(CScriptCheck &check) {
scriptPubKey.swap(check.scriptPubKey);
std::swap(ptxTo, check.ptxTo);
std::swap(nIn, check.nIn);
std::swap(nFlags, check.nFlags);
std::swap(cacheStore, check.cacheStore);
std::swap(error, check.error);
}

ScriptError GetScriptError() const { return error; }
};

/** Data structure that represents a partial merkle tree.
Expand Down

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