gsup.py 文件源码

def encode_auth_tuple(val, buf, offset, min_len, max_len):
        """
        Encode the Auth tuple IE.

        Args:
            val: (rand, sres, kc) tuple
        Returns:
            The size of encoded auth tuple (always 34)
        """
        (rand, sres, key) = val
        if len(rand) != 16 or len(sres) != 4 or len(key) != 8:
            raise GSUPCodecError(
                "Bad auth tuple to encode: rand: %s, sres: %s, key: %s"
                % (rand, sres, key))
        struct.pack_into(
            '2B16s2B4s2B8s', buf, offset,
            IEType.RAND, 16, rand, IEType.SRES, 4, sres,
            IEType.KC_KEY, 8, key)
        return 34