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Add OP_CHECKSIGFROMSTACK[VERIFY]

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This commit is contained in:
Steven Roose 2019-01-08 14:29:14 +00:00
parent 8c20371f72
commit c27ea98605
5 changed files with 44 additions and 7 deletions
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36
src/script/interpreter.cpp
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@ -1126,6 +1126,42 @@ bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript&
}
break;
case OP_CHECKSIGFROMSTACK:
case OP_CHECKSIGFROMSTACKVERIFY:
{
// (sig data pubkey -- bool)
if (stack.size() < 3)
return set_error(serror, SCRIPT_ERR_INVALID_STACK_OPERATION);
valtype& vchSig = stacktop(-3);
valtype& vchData = stacktop(-2);
valtype& vchPubKey = stacktop(-1);
// Sigs from stack have no hash byte ever
if (!CheckSignatureEncoding(vchSig, (flags | SCRIPT_NO_SIGHASH_BYTE), serror) || !CheckPubKeyEncoding(vchPubKey, flags, sigversion, serror)) {
//serror is set
return false;
}
valtype vchHash(32);
CSHA256().Write(vchData.data(), vchData.size()).Finalize(vchHash.data());
uint256 hash(vchHash);
CPubKey pubkey(vchPubKey);
bool fSuccess = pubkey.Verify(hash, vchSig);
popstack(stack);
popstack(stack);
popstack(stack);
stack.push_back(fSuccess ? vchTrue : vchFalse);
if (opcode == OP_CHECKSIGFROMSTACKVERIFY)
popstack(stack);
if (!fSuccess)
return set_error(serror, SCRIPT_ERR_CHECKSIGVERIFY);
}
break;
default:
return set_error(serror, SCRIPT_ERR_BAD_OPCODE);
}