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Merge pull request #3843

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787ee0c Check redeemScript size does not exceed 520 byte limit (Peter Todd)
4d79098 Increase IsStandard() scriptSig length (Peter Todd)
f80cffa Do not trigger a DoS ban if SCRIPT_VERIFY_NULLDUMMY fails (Peter Todd)
6380180 Add rejection of non-null CHECKMULTISIG dummy values (Peter Todd)
29c1749 Let tx (in)valid tests use any SCRIPT_VERIFY flag (Peter Todd)
68f7d1d Create (MANDATORY|STANDARD)_SCRIPT_VERIFY_FLAGS constants (Peter Todd)
This commit is contained in:
Wladimir J. van der Laan 2014-05-09 16:03:34 +02:00
commit 54f102248b
No known key found for this signature in database
GPG key ID: 74810B012346C9A6
12 changed files with 211 additions and 71 deletions
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18
src/script.cpp
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@ -923,8 +923,22 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
fSuccess = false;
}
while (i-- > 0)
// Clean up stack of actual arguments
while (i-- > 1)
popstack(stack);
// A bug causes CHECKMULTISIG to consume one extra argument
// whose contents were not checked in any way.
//
// Unfortunately this is a potential source of mutability,
// so optionally verify it is exactly equal to zero prior
// to removing it from the stack.
if (stack.size() < 1)
return false;
if ((flags & SCRIPT_VERIFY_NULLDUMMY) && stacktop(-1).size())
return error("CHECKMULTISIG dummy argument not null");
popstack(stack);
stack.push_back(fSuccess ? vchTrue : vchFalse);
if (opcode == OP_CHECKMULTISIGVERIFY)
@ -1659,7 +1673,7 @@ bool SignSignature(const CKeyStore &keystore, const CScript& fromPubKey, CTransa
}
// Test solution
return VerifyScript(txin.scriptSig, fromPubKey, txTo, nIn, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC, 0);
return VerifyScript(txin.scriptSig, fromPubKey, txTo, nIn, STANDARD_SCRIPT_VERIFY_FLAGS, 0);
}
bool SignSignature(const CKeyStore &keystore, const CTransaction& txFrom, CTransaction& txTo, unsigned int nIn, int nHashType)