116 lines
4.0 KiB
Python
116 lines
4.0 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# 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 Plugin"""
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import abc
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import six
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from keystone import auth
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from keystone.common import config
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from keystone import exception
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from keystone.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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CONF = config.CONF
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@six.add_metaclass(abc.ABCMeta)
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class Base(auth.AuthMethodHandler):
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def authenticate(self, context, auth_info, auth_context):
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"""Use REMOTE_USER to look up the user in the identity backend.
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auth_context is an in-out variable that will be updated with the
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user_id from the actual user from the REMOTE_USER env variable.
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"""
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try:
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REMOTE_USER = context['environment']['REMOTE_USER']
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except KeyError:
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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(REMOTE_USER, auth_info)
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auth_context['user_id'] = user_ref['id']
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if ('kerberos' in CONF.token.bind and
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(context['environment'].get('AUTH_TYPE', '').lower()
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== 'negotiate')):
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auth_context['bind']['kerberos'] = user_ref['name']
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except Exception:
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msg = _('Unable to lookup user %s') % (REMOTE_USER)
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raise exception.Unauthorized(msg)
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@abc.abstractmethod
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def _authenticate(self, remote_user):
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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 Default(Base):
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def _authenticate(self, remote_user, auth_info):
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"""Use remote_user to look up the user in the identity backend."""
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names = remote_user.split('@')
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username = names.pop(0)
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domain_id = CONF.identity.default_domain_id
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user_ref = auth_info.identity_api.get_user_by_name(username,
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domain_id)
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return user_ref
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class Domain(Base):
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def _authenticate(self, remote_user, auth_info):
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"""Use remote_user to look up the user in the identity backend.
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If remote_user contains an `@` assume that the substring before the
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rightmost `@` is the username, and the substring after the @ is the
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domain name.
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"""
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names = remote_user.rsplit('@', 1)
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username = names.pop(0)
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if names:
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domain_name = names[0]
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domain_ref = (auth_info.assignment_api.
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get_domain_by_name(domain_name))
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domain_id = domain_ref['id']
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else:
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domain_id = CONF.identity.default_domain_id
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user_ref = auth_info.identity_api.get_user_by_name(username,
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domain_id)
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return user_ref
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# NOTE(aloga): ExternalDefault and External have been renamed to Default and
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# Domain.
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class ExternalDefault(Default):
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"""Deprecated. Please use keystone.auth.external.Default instead."""
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def __init__(self):
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msg = _('keystone.auth.external.ExternalDefault is deprecated in'
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'favor of keystone.auth.external.Default')
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LOG.warning(msg)
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class ExternalDomain(Domain):
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"""Deprecated. Please use keystone.auth.external.Domain instead."""
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def __init__(self):
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msg = _('keystone.auth.external.ExternalDomain is deprecated in'
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'favor of keystone.auth.external.Domain')
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LOG.warning(msg)
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