96 lines
3.1 KiB
Python
96 lines
3.1 KiB
Python
# Copyright 2013 OpenStack Foundation
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Keystone External Authentication Plugins."""
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import abc
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import flask
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from keystone.auth.plugins import base
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from keystone.common import provider_api
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import keystone.conf
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from keystone import exception
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from keystone.i18n import _
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CONF = keystone.conf.CONF
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PROVIDERS = provider_api.ProviderAPIs
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class Base(base.AuthMethodHandler, metaclass=abc.ABCMeta):
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def authenticate(self, auth_payload):
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"""Use REMOTE_USER to look up the user in the identity backend.
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The user_id from the actual user from the REMOTE_USER env variable is
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placed in the response_data.
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"""
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response_data = {}
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if not flask.request.remote_user:
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msg = _('No authenticated user')
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raise exception.Unauthorized(msg)
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try:
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user_ref = self._authenticate()
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except Exception:
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msg = _('Unable to lookup user %s') % flask.request.remote_user
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raise exception.Unauthorized(msg)
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response_data['user_id'] = user_ref['id']
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return base.AuthHandlerResponse(status=True, response_body=None,
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response_data=response_data)
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@abc.abstractmethod
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def _authenticate(self):
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"""Look up the user in the identity backend.
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Return user_ref
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"""
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pass
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class DefaultDomain(Base):
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def _authenticate(self):
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"""Use remote_user to look up the user in the identity backend."""
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return PROVIDERS.identity_api.get_user_by_name(
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flask.request.remote_user,
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CONF.identity.default_domain_id)
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class Domain(Base):
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def _authenticate(self):
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"""Use remote_user to look up the user in the identity backend.
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The domain will be extracted from the REMOTE_DOMAIN environment
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variable if present. If not, the default domain will be used.
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"""
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remote_domain = flask.request.environ.get('REMOTE_DOMAIN')
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if remote_domain:
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ref = PROVIDERS.resource_api.get_domain_by_name(remote_domain)
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domain_id = ref['id']
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else:
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domain_id = CONF.identity.default_domain_id
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return PROVIDERS.identity_api.get_user_by_name(
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flask.request.remote_user, domain_id)
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class KerberosDomain(Domain):
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"""Allows `kerberos` as a method."""
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def _authenticate(self):
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if flask.request.environ.get('AUTH_TYPE') != 'Negotiate':
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raise exception.Unauthorized(_("auth_type is not Negotiate"))
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return super(KerberosDomain, self)._authenticate()
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