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proposed fix for issue 242

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Brannon King 2019-09-11 15:11:04 -06:00 • committed by Anthony Fieroni
parent b38c393fbd
commit a754260423
2 changed files with 6 additions and 2 deletions
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1
src/nameclaim.cpp
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@ -62,6 +62,7 @@ bool DecodeClaimScript(const CScript& scriptIn, int& op, std::vector<std::vector
bool DecodeClaimScript(const CScript& scriptIn, int& op, std::vector<std::vector<unsigned char> >& vvchParams, CScript::const_iterator& pc)
{
op = -1;
opcodetype opcode;
if (!scriptIn.GetOp(pc, opcode))
{

7
src/script/interpreter.cpp
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@ -1493,6 +1493,11 @@ bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const C
// scriptSig and scriptPubKey must be evaluated sequentially on the same stack
// rather than being simply concatenated (see CVE-2010-5141)
int claimOp;
const CScript& strippedScriptPubKey = StripClaimScriptPrefix(scriptPubKey, claimOp);
if (claimOp >= 0) // lbryum used to violate this rule with an off-by-1 at len == 255 (and its not very important)
flags &= ~SCRIPT_VERIFY_MINIMALDATA;
std::vector<std::vector<unsigned char> > stack, stackCopy;
if (!EvalScript(stack, scriptSig, flags, checker, SigVersion::BASE, serror))
// serror is set
@ -1509,8 +1514,6 @@ bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const C
// Bare witness programs
const CScript& strippedScriptPubKey = StripClaimScriptPrefix(scriptPubKey);
int witnessversion;
std::vector<unsigned char> witnessprogram;
if (flags & SCRIPT_VERIFY_WITNESS) {