Function CheckSignatureEncoding

src/script/interpreter.cpp:288–311

}

bool CheckSignatureEncoding(const std::vector<unsigned char> &vchSig, unsigned int flags, ScriptError* serror) {
    // Empty signature. Not strictly DER encoded, but allowed to provide a
    // compact way to provide an invalid signature for use with CHECK(MULTI)SIG
    if (vchSig.size() == 0) {
        return true;
    }

    bool no_hash_byte = (flags & SCRIPT_NO_SIGHASH_BYTE) == SCRIPT_NO_SIGHASH_BYTE;
    std::vector<unsigned char> vchSigCopy(vchSig.begin(), vchSig.begin() + vchSig.size());
    // Push a dummy sighash byte to pass checks
    if (no_hash_byte) {
        vchSigCopy.push_back(SIGHASH_ALL);
    }

    if ((flags & (SCRIPT_VERIFY_DERSIG | SCRIPT_VERIFY_LOW_S | SCRIPT_VERIFY_STRICTENC)) != 0 && !IsValidSignatureEncoding(vchSigCopy)) {
        return set_error(serror, SCRIPT_ERR_SIG_DER);
    } else if ((flags & SCRIPT_VERIFY_LOW_S) != 0 && !IsLowDERSignature(vchSigCopy, serror)) {
        // serror is set
        return false;
    } else if ((flags & SCRIPT_VERIFY_STRICTENC) != 0 && !IsDefinedHashtypeSignature(vchSigCopy, flags)) {
        return set_error(serror, SCRIPT_ERR_SIG_HASHTYPE);
    }
    return true;
}

bool static CheckPubKeyEncoding(const valtype &vchPubKey, unsigned int flags, const SigVersion &sigversion, ScriptError* serror) {
    if ((flags & SCRIPT_VERIFY_STRICTENC) != 0 && !IsCompressedOrUncompressedPubKey(vchPubKey)) {