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Merge pull request #2114 from sipa/strictstrict

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Make IsCanonicalScript() check the hash type more thoroughly
This commit is contained in:
Gavin Andresen
2013-01-23 07:08:55 -08:00
parent 5a4af8f71f bffc744444
commit c429f2b062
1 changed files with 2 additions and 1 deletions
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3
src/script.cpp
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@@ -278,7 +278,8 @@ bool IsCanonicalSignature(const valtype &vchSig) {
return error("Non-canonical signature: too short"); return error("Non-canonical signature: too short");
if (vchSig.size() > 73) if (vchSig.size() > 73)
return error("Non-canonical signature: too long"); return error("Non-canonical signature: too long");
if (vchSig[vchSig.size() - 1] & 0x7C) unsigned char nHashType = vchSig[vchSig.size() - 1] & (~(SIGHASH_ANYONECANPAY));
if (nHashType < SIGHASH_ALL || nHashType > SIGHASH_SINGLE)
return error("Non-canonical signature: unknown hashtype byte"); return error("Non-canonical signature: unknown hashtype byte");
if (vchSig[0] != 0x30) if (vchSig[0] != 0x30)
return error("Non-canonical signature: wrong type"); return error("Non-canonical signature: wrong type");