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ScriptHasvalidPAKProof: Allow any standard single-key output script type

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This commit is contained in:
Gregory Sanders 2019-01-03 16:47:26 -05:00
parent 71acfb359b
commit 542b826c95
1 changed files with 24 additions and 16 deletions
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40
src/primitives/pak.cpp
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@ -179,29 +179,37 @@ bool ScriptHasValidPAKProof(const CScript& script, const uint256& genesis_hash)
script.GetOp(pc, opcode, data);
script.GetOp(pc, opcode, data);
CScript destination(data.begin(), data.end());
// Only accept p2pkh
if (!destination.IsPayToPubkeyHash()) {
return false;
}
CScript chain_dest(data.begin(), data.end());
// Grab pubkey hash within the extracted sub-script
CScript::const_iterator pc2 = destination.begin();
std::vector<unsigned char> data2;
opcodetype opcode2;
if (!destination.GetOp(pc2, opcode2, data2) || !destination.GetOp(pc2, opcode2, data2) ||!destination.GetOp(pc2, opcode2, data2)) {
return false;
}
std::vector<unsigned char> extracted_pubkey_hash;
// Follow-up with full pubkey
// Get full pubkey
if (!script.GetOp(pc, opcode, data) || opcode != 33 || data.size() != 33) {
return false;
}
CPubKey full_pubkey(data.begin(), data.end());
CPubKey cpubkey(data.begin(), data.end());
//Ensure the chaindest p2pkh matches the included pubkey
if (cpubkey.GetID() != uint160(data2)) {
// Accept any standard single-key type
if (chain_dest.IsPayToPubkeyHash()) {
extracted_pubkey_hash = std::vector<unsigned char>(chain_dest.begin()+3, chain_dest.begin()+23);
if (full_pubkey.GetID() != uint160(extracted_pubkey_hash)) {
return false;
}
} else if (chain_dest.IsPayToWitnessPubkeyHash()) {
extracted_pubkey_hash = std::vector<unsigned char>(chain_dest.begin()+2, chain_dest.begin()+22);
if (full_pubkey.GetID() != uint160(extracted_pubkey_hash)) {
return false;
}
} else if (chain_dest.IsPayToScriptHash()) {
// Take full_pubkey, and hash it to match against chain_dest
CScript p2wpkh(CScript() << OP_0 << ToByteVector(full_pubkey.GetID()));
unsigned char h160[20];
CHash160().Write(p2wpkh.data(), p2wpkh.size()).Finalize(h160);
if (memcmp(h160, chain_dest.data()+2, sizeof(h160))) {
return false;
}
} else {
return false;
}