Calculate RADIUS packet authenticator. Input packet's hex string, output authenticator in hex form.

rds_authenticator.py

#!/usr/bin/env python

import hashlib
import base64
import binascii

def main():
    pktstr = raw_input()
    m = hashlib.md5()
    m.update(base64.b16decode(pktstr.replace(' ', '').upper()))
    authenticator = binascii.b2a_hex(m.digest())
    print "authenticator:"
    print "%s" % (authenticator)


if __name__ == "__main__":
    main()

nice job！