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81 lines
2.7 KiB
Python
81 lines
2.7 KiB
Python
# This file is part of Radicale - CalDAV and CardDAV server
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# Copyright © 2008 Nicolas Kandel
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# Copyright © 2008 Pascal Halter
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# Copyright © 2008-2017 Guillaume Ayoub
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# Copyright © 2017-2018 Unrud <unrud@outlook.com>
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Radicale. If not, see <http://www.gnu.org/licenses/>.
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"""
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Authentication module.
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Authentication is based on usernames and passwords. If something more
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advanced is needed an external WSGI server or reverse proxy can be used
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(see ``remote_user`` or ``http_x_remote_user`` backend).
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Take a look at the class ``BaseAuth`` if you want to implement your own.
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"""
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from typing import Sequence, Tuple, Union
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from radicale import config, types, utils
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INTERNAL_TYPES: Sequence[str] = ("none", "remote_user", "http_x_remote_user",
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"htpasswd")
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def load(configuration: "config.Configuration") -> "BaseAuth":
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"""Load the authentication module chosen in configuration."""
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return utils.load_plugin(INTERNAL_TYPES, "auth", "Auth", BaseAuth,
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configuration)
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class BaseAuth:
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def __init__(self, configuration: "config.Configuration") -> None:
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"""Initialize BaseAuth.
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``configuration`` see ``radicale.config`` module.
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The ``configuration`` must not change during the lifetime of
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this object, it is kept as an internal reference.
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"""
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self.configuration = configuration
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def get_external_login(self, environ: types.WSGIEnviron) -> Union[
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Tuple[()], Tuple[str, str]]:
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"""Optionally provide the login and password externally.
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``environ`` a dict with the WSGI environment
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If ``()`` is returned, Radicale handles HTTP authentication.
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Otherwise, returns a tuple ``(login, password)``. For anonymous users
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``login`` must be ``""``.
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"""
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return ()
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def login(self, login: str, password: str) -> str:
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"""Check credentials and map login to internal user
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``login`` the login name
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``password`` the password
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Returns the username or ``""`` for invalid credentials.
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"""
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raise NotImplementedError
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