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########################################################################
# File name: anonymous.py
# This file is part of: aiosasl
#
# LICENSE
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this program. If not, see
# <http://www.gnu.org/licenses/>.
#
########################################################################
import logging
import typing
from . import common, statemachine, stringprep
logger = logging.getLogger()
class ANONYMOUS(statemachine.SASLMechanism):
"""
The ANONYMOUS SASL mechanism (see :rfc:`4505`).
.. versionadded:: 0.3
"""
def __init__(self, token: str) -> None:
super().__init__()
self._token = stringprep.trace(token).encode("utf-8")
@classmethod
def any_supported(
self,
mechanisms: typing.Iterable[str],
) -> typing.Optional[str]:
if "ANONYMOUS" in mechanisms:
return "ANONYMOUS"
return None
async def authenticate(
self,
sm: statemachine.SASLStateMachine,
mechanism: typing.Any) -> None:
logger.info("attempting ANONYMOUS mechanism")
state, _ = await sm.initiate(
mechanism="ANONYMOUS",
payload=self._token
)
if state != common.SASLState.SUCCESS:
raise common.SASLFailure(
None,
text="SASL protocol violation")
|
