def rn5_auth(username, realm, password, nonce, uuid):
    MUNGE_TEMPLATE ='%-.200s%-.200s%-.200sCopyright (C) 1995,1996,1997 RealNetworks, Inc.'
    authstr ="%-.200s:%-.200s:%-.200s" % (username, realm, password)
    first_pass = hashlib.md5(authstr).hexdigest()