Esempio n. 1
0
bool ProduceSignature(const BaseSignatureCreator& creator, const CScript& fromPubKey, CScript& scriptSig)
{
    txnouttype whichType;
    if (!SignStep(creator, fromPubKey, scriptSig, whichType))
        return false;

    if (whichType == TX_SCRIPTHASH)
    {
        // Solver returns the subscript that need to be evaluated;
        // the final scriptSig is the signatures from that
        // and then the serialized subscript:
        CScript subscript = scriptSig;

        txnouttype subType;
        bool fSolved =
            SignStep(creator, subscript, scriptSig, subType) && subType != TX_SCRIPTHASH;
        // Append serialized subscript whether or not it is completely signed:
        scriptSig << valtype(subscript.begin(), subscript.end());
        if (!fSolved) return false;
    }

    // Test solution
    return VerifyScript(scriptSig, fromPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, creator.Checker());
}
Esempio n. 2
0
bool ProduceSignature(const SigningProvider& provider, const BaseSignatureCreator& creator, const CScript& fromPubKey, SignatureData& sigdata)
{
    if (sigdata.complete) return true;

    std::vector<valtype> result;
    txnouttype whichType;
    bool solved = SignStep(provider, creator, fromPubKey, result, whichType, SigVersion::BASE, sigdata);
    bool P2SH = false;
    CScript subscript;
    sigdata.scriptWitness.stack.clear();

    if (solved && whichType == TX_SCRIPTHASH)
    {
        // Solver returns the subscript that needs to be evaluated;
        // the final scriptSig is the signatures from that
        // and then the serialized subscript:
        subscript = CScript(result[0].begin(), result[0].end());
        sigdata.redeem_script = subscript;
        solved = solved && SignStep(provider, creator, subscript, result, whichType, SigVersion::BASE, sigdata) && whichType != TX_SCRIPTHASH;
        P2SH = true;
    }

    if (solved && whichType == TX_WITNESS_V0_KEYHASH)
    {
        CScript witnessscript;
        witnessscript << OP_DUP << OP_HASH160 << ToByteVector(result[0]) << OP_EQUALVERIFY << OP_CHECKSIG;
        txnouttype subType;
        solved = solved && SignStep(provider, creator, witnessscript, result, subType, SigVersion::WITNESS_V0, sigdata);
        sigdata.scriptWitness.stack = result;
        sigdata.witness = true;
        result.clear();
    }
    else if (solved && whichType == TX_WITNESS_V0_SCRIPTHASH)
    {
        CScript witnessscript(result[0].begin(), result[0].end());
        sigdata.witness_script = witnessscript;
        txnouttype subType;
        solved = solved && SignStep(provider, creator, witnessscript, result, subType, SigVersion::WITNESS_V0, sigdata) && subType != TX_SCRIPTHASH && subType != TX_WITNESS_V0_SCRIPTHASH && subType != TX_WITNESS_V0_KEYHASH;
        result.push_back(std::vector<unsigned char>(witnessscript.begin(), witnessscript.end()));
        sigdata.scriptWitness.stack = result;
        sigdata.witness = true;
        result.clear();
    } else if (solved && whichType == TX_WITNESS_UNKNOWN) {
        sigdata.witness = true;
    }

    if (P2SH) {
        result.push_back(std::vector<unsigned char>(subscript.begin(), subscript.end()));
    }
    sigdata.scriptSig = PushAll(result);

    // Test solution
    sigdata.complete = solved && VerifyScript(sigdata.scriptSig, fromPubKey, &sigdata.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, creator.Checker());
    return sigdata.complete;
}