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Introduce script verification flags

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These flags select features to be enabled/disabled during script
evaluation/checking, instead of several booleans passed along.
Currently these flags are defined:
* SCRIPT_VERIFY_P2SH: enable BIP16-style subscript evaluation
* SCRIPT_VERIFY_STRICTENC: enforce strict adherence to pubkey/sig encoding standards.
This commit is contained in:
Pieter Wuille
2012-11-13 23:03:25 +01:00
parent 6caffb5358
commit 99d0d0f356
10 changed files with 69 additions and 63 deletions
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12
src/main.cpp
View File

@@ -771,7 +771,7 @@ bool CTxMemPool::accept(CTransaction &tx, bool fCheckInputs,
// Check against previous transactions
// This is done last to help prevent CPU exhaustion denial-of-service attacks.
if (!tx.CheckInputs(view, CS_ALWAYS, true, false))
if (!tx.CheckInputs(view, CS_ALWAYS, SCRIPT_VERIFY_P2SH))
{
return error("CTxMemPool::accept() : ConnectInputs failed %s", hash.ToString().substr(0,10).c_str());
}
@@ -1327,7 +1327,7 @@ bool CTransaction::HaveInputs(CCoinsViewCache &inputs) const
return true;
}
bool CTransaction::CheckInputs(CCoinsViewCache &inputs, enum CheckSig_mode csmode, bool fStrictPayToScriptHash, bool fStrictEncodings) const
bool CTransaction::CheckInputs(CCoinsViewCache &inputs, enum CheckSig_mode csmode, unsigned int flags) const
{
if (!IsCoinBase())
{
@@ -1384,7 +1384,7 @@ bool CTransaction::CheckInputs(CCoinsViewCache &inputs, enum CheckSig_mode csmod
const CCoins &coins = inputs.GetCoins(prevout.hash);
// Verify signature
if (!VerifySignature(coins, *this, i, fStrictPayToScriptHash, fStrictEncodings, 0))
if (!VerifySignature(coins, *this, i, flags, 0))
return DoS(100,error("CheckInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str()));
}
}
@@ -1415,7 +1415,7 @@ bool CTransaction::ClientCheckInputs() const
return false;
// Verify signature
if (!VerifySignature(CCoins(txPrev, -1), *this, i, true, false, 0))
if (!VerifySignature(CCoins(txPrev, -1), *this, i, SCRIPT_VERIFY_P2SH, 0))
return error("ConnectInputs() : VerifySignature failed");
///// this is redundant with the mempool.mapNextTx stuff,
@@ -1598,7 +1598,7 @@ bool CBlock::ConnectBlock(CBlockIndex* pindex, CCoinsViewCache &view, bool fJust
nFees += tx.GetValueIn(view)-tx.GetValueOut();
if (!tx.CheckInputs(view, CS_AFTER_CHECKPOINT, fStrictPayToScriptHash, false))
if (!tx.CheckInputs(view, CS_AFTER_CHECKPOINT, fStrictPayToScriptHash ? SCRIPT_VERIFY_P2SH : SCRIPT_VERIFY_NONE))
return false;
}
@@ -3863,7 +3863,7 @@ CBlock* CreateNewBlock(CReserveKey& reservekey)
if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
continue;
if (!tx.CheckInputs(viewTemp, CS_ALWAYS, true, false))
if (!tx.CheckInputs(viewTemp, CS_ALWAYS, SCRIPT_VERIFY_P2SH))
continue;
CTxUndo txundo;