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Merge branch '0.4.x' into 0.5.0.x

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Conflicts:
	src/main.cpp
This commit is contained in:
Luke Dashjr
2012-03-21 13:39:57 -04:00
parent 17a5fd9248 cdc6b8d6a6
commit 2ac8af4534
4 changed files with 375 additions and 110 deletions
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93
src/script.cpp
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@@ -1147,16 +1147,40 @@ bool ExtractAddress(const CScript& scriptPubKey, const CKeyStore* keystore, CBit
}
bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CTransaction& txTo, unsigned int nIn, int nHashType)
bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CTransaction& txTo, unsigned int nIn,
bool fValidatePayToScriptHash, int nHashType)
{
vector<vector<unsigned char> > stack;
vector<vector<unsigned char> > stack, stackCopy;
if (!EvalScript(stack, scriptSig, txTo, nIn, nHashType))
return false;
if (fValidatePayToScriptHash)
stackCopy = stack;
if (!EvalScript(stack, scriptPubKey, txTo, nIn, nHashType))
return false;
if (stack.empty())
return false;
return CastToBool(stack.back());
if (CastToBool(stack.back()) == false)
return false;
// Additional validation for spend-to-script-hash transactions:
if (fValidatePayToScriptHash && scriptPubKey.IsPayToScriptHash())
{
if (!scriptSig.IsPushOnly()) // scriptSig must be literals-only
return false; // or validation fails
const valtype& pubKeySerialized = stackCopy.back();
CScript pubKey2(pubKeySerialized.begin(), pubKeySerialized.end());
popstack(stackCopy);
if (!EvalScript(stackCopy, pubKey2, txTo, nIn, nHashType))
return false;
if (stackCopy.empty())
return false;
return CastToBool(stackCopy.back());
}
return true;
}
@@ -1178,14 +1202,14 @@ bool SignSignature(const CKeyStore &keystore, const CTransaction& txFrom, CTrans
// Test solution
if (scriptPrereq.empty())
if (!VerifyScript(txin.scriptSig, txout.scriptPubKey, txTo, nIn, 0))
if (!VerifyScript(txin.scriptSig, txout.scriptPubKey, txTo, nIn, true, 0))
return false;
return true;
}
bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, int nHashType)
bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, bool fValidatePayToScriptHash, int nHashType)
{
assert(nIn < txTo.vin.size());
const CTxIn& txin = txTo.vin[nIn];
@@ -1196,8 +1220,65 @@ bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsig
if (txin.prevout.hash != txFrom.GetHash())
return false;
if (!VerifyScript(txin.scriptSig, txout.scriptPubKey, txTo, nIn, nHashType))
if (!VerifyScript(txin.scriptSig, txout.scriptPubKey, txTo, nIn, fValidatePayToScriptHash, nHashType))
return false;
return true;
}
int CScript::GetSigOpCount(bool fAccurate) const
{
int n = 0;
const_iterator pc = begin();
opcodetype lastOpcode = OP_INVALIDOPCODE;
while (pc < end())
{
opcodetype opcode;
if (!GetOp(pc, opcode))
break;
if (opcode == OP_CHECKSIG || opcode == OP_CHECKSIGVERIFY)
n++;
else if (opcode == OP_CHECKMULTISIG || opcode == OP_CHECKMULTISIGVERIFY)
{
if (fAccurate && lastOpcode >= OP_1 && lastOpcode <= OP_16)
n += DecodeOP_N(lastOpcode);
else
n += 20;
}
lastOpcode = opcode;
}
return n;
}
int CScript::GetSigOpCount(const CScript& scriptSig) const
{
if (!IsPayToScriptHash())
return GetSigOpCount(true);
// This is a pay-to-script-hash scriptPubKey;
// get the last item that the scriptSig
// pushes onto the stack:
const_iterator pc = scriptSig.begin();
vector<unsigned char> data;
while (pc < scriptSig.end())
{
opcodetype opcode;
if (!scriptSig.GetOp(pc, opcode, data))
return 0;
if (opcode > OP_16)
return 0;
}
/// ... and return it's opcount:
CScript subscript(data.begin(), data.end());
return subscript.GetSigOpCount(true);
}
bool CScript::IsPayToScriptHash() const
{
// Extra-fast test for pay-to-script-hash CScripts:
return (this->size() == 23 &&
this->at(0) == OP_HASH160 &&
this->at(1) == 0x14 &&
this->at(22) == OP_EQUAL);
}