429     def __init__(self, address=None, family=None, backlog=1, authkey=None):  argument
440         if authkey is not None and not isinstance(authkey, bytes):
443         self._authkey = authkey
483 def Client(address, family=None, authkey=None):  argument
494     if authkey is not None and not isinstance(authkey, bytes):
497     if authkey is not None:
498         answer_challenge(c, authkey)
499         deliver_challenge(c, authkey)
721 def deliver_challenge(connection, authkey):  argument
723     if not isinstance(authkey, bytes):
725             "Authkey must be bytes, not {0!s}".format(type(authkey)))
728     digest = hmac.new(authkey, message, 'md5').digest()
736 def answer_challenge(connection, authkey):  argument
738     if not isinstance(authkey, bytes):
740             "Authkey must be bytes, not {0!s}".format(type(authkey)))
744     digest = hmac.new(authkey, message, 'md5').digest()