Differential D3675 Diff 10293 src/script/interpreter.cpp

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src/script/interpreter.cpp

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// Remove signature for pre-fork scripts		// Remove signature for pre-fork scripts
for (int k = 0; k < nSigsCount; k++) {		for (int k = 0; k < nSigsCount; k++) {
valtype &vchSig = stacktop(-idxTopSig - k);		valtype &vchSig = stacktop(-idxTopSig - k);
CleanupScriptCode(scriptCode, vchSig, flags);		CleanupScriptCode(scriptCode, vchSig, flags);
}		}

bool fSuccess = true;		bool fSuccess = true;
size_t ikey = idxTopKey;
size_t isig = idxTopSig;
int nSigsRemaining = nSigsCount;		int nSigsRemaining = nSigsCount;
int nKeysRemaining = nKeysCount;		int nKeysRemaining = nKeysCount;
while (fSuccess && nSigsRemaining > 0) {		while (fSuccess && nSigsRemaining > 0) {
valtype &vchSig = stacktop(-isig);		valtype &vchSig = stacktop(
valtype &vchPubKey = stacktop(-ikey);		-idxTopSig - (nSigsCount - nSigsRemaining));
		valtype &vchPubKey = stacktop(
		-idxTopKey - (nKeysCount - nKeysRemaining));

// Note how this makes the exact order of		// Note how this makes the exact order of
// pubkey/signature evaluation distinguishable by		// pubkey/signature evaluation distinguishable by
// CHECKMULTISIG NOT if the STRICTENC flag is set.		// CHECKMULTISIG NOT if the STRICTENC flag is set.
// See the script_(in)valid tests for details.		// See the script_(in)valid tests for details.
if (!CheckTransactionECDSASignatureEncoding(		if (!CheckTransactionECDSASignatureEncoding(
vchSig, flags, serror) \|\|		vchSig, flags, serror) \|\|
!CheckPubKeyEncoding(vchPubKey, flags,		!CheckPubKeyEncoding(vchPubKey, flags,
serror)) {		serror)) {
// serror is set		// serror is set
return false;		return false;
}		}

// Check signature		// Check signature
bool fOk = checker.CheckSig(vchSig, vchPubKey,		bool fOk = checker.CheckSig(vchSig, vchPubKey,
scriptCode, flags);		scriptCode, flags);

if (fOk) {		if (fOk) {
isig++;
nSigsRemaining--;		nSigsRemaining--;
}		}
ikey++;
nKeysRemaining--;		nKeysRemaining--;

// If there are more signatures left than keys left,		// If there are more signatures left than keys left,
// then too many signatures have failed. Exit early,		// then too many signatures have failed. Exit early,
// without checking any further signatures.		// without checking any further signatures.
if (nSigsRemaining > nKeysRemaining) {		if (nSigsRemaining > nKeysRemaining) {
fSuccess = false;		fSuccess = false;
}		}
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