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When using SIGHASH_SINGLE, do not sign inputs that have no corresponding outputs.

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This fixes issue #1688
This commit is contained in:
Gavin Andresen 2012-08-20 14:06:27 -04:00
parent b3a570d158
commit d5e7b61173
1 changed files with 5 additions and 1 deletions
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6
src/rpcrawtransaction.cpp
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@ -428,6 +428,8 @@ Value signrawtransaction(const Array& params, bool fHelp)
throw JSONRPCError(-8, "Invalid sighash param"); throw JSONRPCError(-8, "Invalid sighash param");
} }
bool fHashSingle = ((nHashType & ~SIGHASH_ANYONECANPAY) == SIGHASH_SINGLE);
// Sign what we can: // Sign what we can:
for (unsigned int i = 0; i < mergedTx.vin.size(); i++) for (unsigned int i = 0; i < mergedTx.vin.size(); i++)
{ {
@ -440,7 +442,9 @@ Value signrawtransaction(const Array& params, bool fHelp)
const CScript& prevPubKey = mapPrevOut[txin.prevout]; const CScript& prevPubKey = mapPrevOut[txin.prevout];
txin.scriptSig.clear(); txin.scriptSig.clear();
SignSignature(keystore, prevPubKey, mergedTx, i, nHashType); // Only sign SIGHASH_SINGLE if there's a corresponding output:
if (!fHashSingle || (i < mergedTx.vout.size()))
SignSignature(keystore, prevPubKey, mergedTx, i, nHashType);
// ... and merge in other signatures: // ... and merge in other signatures:
BOOST_FOREACH(const CTransaction& txv, txVariants) BOOST_FOREACH(const CTransaction& txv, txVariants)