== SignatureAlgorithmID ==
ID 1: The signature type is 2048-bit RSA-PKCS1-SHA1 of length 256
The updater program will not use a MAR file if one of the known signatures does not verify. If the updater program encounters a SignatureAlgorithmID that it does not know about, it will not check the signature, and will proceed to the next signature. This is why there exists a SignatureLength field, so that unknown signatures can be skipped.