aboutsummaryrefslogtreecommitdiffstats
path: root/keystone-moon/keystone/identity/backends/ldap.py
blob: 1f33bacb3e6d65c8b6f333c4e7225f9a1af4498f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
# Copyright 2012 OpenStack Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from __future__ import absolute_import
import uuid

import ldap.filter
from oslo_config import cfg
from oslo_log import log
import six

from keystone.common import clean
from keystone.common import driver_hints
from keystone.common import ldap as common_ldap
from keystone.common import models
from keystone import exception
from keystone.i18n import _
from keystone import identity


CONF = cfg.CONF
LOG = log.getLogger(__name__)


class Identity(identity.IdentityDriverV8):
    def __init__(self, conf=None):
        super(Identity, self).__init__()
        if conf is None:
            conf = CONF
        self.user = UserApi(conf)
        self.group = GroupApi(conf)

    def default_assignment_driver(self):
        return 'ldap'

    def is_domain_aware(self):
        return False

    def generates_uuids(self):
        return False

    # Identity interface

    def authenticate(self, user_id, password):
        try:
            user_ref = self._get_user(user_id)
        except exception.UserNotFound:
            raise AssertionError(_('Invalid user / password'))
        if not user_id or not password:
            raise AssertionError(_('Invalid user / password'))
        conn = None
        try:
            conn = self.user.get_connection(user_ref['dn'],
                                            password, end_user_auth=True)
            if not conn:
                raise AssertionError(_('Invalid user / password'))
        except Exception:
            raise AssertionError(_('Invalid user / password'))
        finally:
            if conn:
                conn.unbind_s()
        return self.user.filter_attributes(user_ref)

    def _get_user(self, user_id):
        return self.user.get(user_id)

    def get_user(self, user_id):
        return self.user.get_filtered(user_id)

    def list_users(self, hints):
        return self.user.get_all_filtered(hints)

    def get_user_by_name(self, user_name, domain_id):
        # domain_id will already have been handled in the Manager layer,
        # parameter left in so this matches the Driver specification
        return self.user.filter_attributes(self.user.get_by_name(user_name))

    # CRUD
    def create_user(self, user_id, user):
        self.user.check_allow_create()
        user_ref = self.user.create(user)
        return self.user.filter_attributes(user_ref)

    def update_user(self, user_id, user):
        self.user.check_allow_update()
        old_obj = self.user.get(user_id)
        if 'name' in user and old_obj.get('name') != user['name']:
            raise exception.Conflict(_('Cannot change user name'))

        if self.user.enabled_mask:
            self.user.mask_enabled_attribute(user)
        elif self.user.enabled_invert and not self.user.enabled_emulation:
            # We need to invert the enabled value for the old model object
            # to prevent the LDAP update code from thinking that the enabled
            # values are already equal.
            user['enabled'] = not user['enabled']
            old_obj['enabled'] = not old_obj['enabled']

        self.user.update(user_id, user, old_obj)
        return self.user.get_filtered(user_id)

    def delete_user(self, user_id):
        self.user.check_allow_delete()
        user = self.user.get(user_id)
        user_dn = user['dn']
        groups = self.group.list_user_groups(user_dn)
        for group in groups:
            self.group.remove_user(user_dn, group['id'], user_id)

        if hasattr(user, 'tenant_id'):
            self.project.remove_user(user.tenant_id, user_dn)
        self.user.delete(user_id)

    def create_group(self, group_id, group):
        self.group.check_allow_create()
        group['name'] = clean.group_name(group['name'])
        return common_ldap.filter_entity(self.group.create(group))

    def get_group(self, group_id):
        return self.group.get_filtered(group_id)

    def get_group_by_name(self, group_name, domain_id):
        # domain_id will already have been handled in the Manager layer,
        # parameter left in so this matches the Driver specification
        return self.group.get_filtered_by_name(group_name)

    def update_group(self, group_id, group):
        self.group.check_allow_update()
        if 'name' in group:
            group['name'] = clean.group_name(group['name'])
        return common_ldap.filter_entity(self.group.update(group_id, group))

    def delete_group(self, group_id):
        self.group.check_allow_delete()
        return self.group.delete(group_id)

    def add_user_to_group(self, user_id, group_id):
        user_ref = self._get_user(user_id)
        user_dn = user_ref['dn']
        self.group.add_user(user_dn, group_id, user_id)

    def remove_user_from_group(self, user_id, group_id):
        user_ref = self._get_user(user_id)
        user_dn = user_ref['dn']
        self.group.remove_user(user_dn, group_id, user_id)

    def list_groups_for_user(self, user_id, hints):
        user_ref = self._get_user(user_id)
        user_dn = user_ref['dn']
        return self.group.list_user_groups_filtered(user_dn, hints)

    def list_groups(self, hints):
        return self.group.get_all_filtered(hints)

    def list_users_in_group(self, group_id, hints):
        users = []
        for user_dn in self.group.list_group_users(group_id):
            user_id = self.user._dn_to_id(user_dn)
            try:
                users.append(self.user.get_filtered(user_id))
            except exception.UserNotFound:
                LOG.debug(("Group member '%(user_dn)s' not found in"
                           " '%(group_id)s'. The user should be removed"
                           " from the group. The user will be ignored."),
                          dict(user_dn=user_dn, group_id=group_id))
        return users

    def check_user_in_group(self, user_id, group_id):
        user_refs = self.list_users_in_group(group_id, driver_hints.Hints())
        for x in user_refs:
            if x['id'] == user_id:
                break
        else:
            # Try to fetch the user to see if it even exists.  This
            # will raise a more accurate exception.
            self.get_user(user_id)
            raise exception.NotFound(_("User '%(user_id)s' not found in"
                                       " group '%(group_id)s'") %
                                     {'user_id': user_id,
                                      'group_id': group_id})


# TODO(termie): turn this into a data object and move logic to driver
class UserApi(common_ldap.EnabledEmuMixIn, common_ldap.BaseLdap):
    DEFAULT_OU = 'ou=Users'
    DEFAULT_STRUCTURAL_CLASSES = ['person']
    DEFAULT_ID_ATTR = 'cn'
    DEFAULT_OBJECTCLASS = 'inetOrgPerson'
    NotFound = exception.UserNotFound
    options_name = 'user'
    attribute_options_names = {'password': 'pass',
                               'email': 'mail',
                               'name': 'name',
                               'enabled': 'enabled',
                               'default_project_id': 'default_project_id'}
    immutable_attrs = ['id']

    model = models.User

    def __init__(self, conf):
        super(UserApi, self).__init__(conf)
        self.enabled_mask = conf.ldap.user_enabled_mask
        self.enabled_default = conf.ldap.user_enabled_default
        self.enabled_invert = conf.ldap.user_enabled_invert
        self.enabled_emulation = conf.ldap.user_enabled_emulation

    def _ldap_res_to_model(self, res):
        obj = super(UserApi, self)._ldap_res_to_model(res)
        if self.enabled_mask != 0:
            enabled = int(obj.get('enabled', self.enabled_default))
            obj['enabled'] = ((enabled & self.enabled_mask) !=
                              self.enabled_mask)
        elif self.enabled_invert and not self.enabled_emulation:
            # This could be a bool or a string.  If it's a string,
            # we need to convert it so we can invert it properly.
            enabled = obj.get('enabled', self.enabled_default)
            if isinstance(enabled, six.string_types):
                if enabled.lower() == 'true':
                    enabled = True
                else:
                    enabled = False
            obj['enabled'] = not enabled
        obj['dn'] = res[0]

        return obj

    def mask_enabled_attribute(self, values):
        value = values['enabled']
        values.setdefault('enabled_nomask', int(self.enabled_default))
        if value != ((values['enabled_nomask'] & self.enabled_mask) !=
                     self.enabled_mask):
            values['enabled_nomask'] ^= self.enabled_mask
        values['enabled'] = values['enabled_nomask']
        del values['enabled_nomask']

    def create(self, values):
        if self.enabled_mask:
            orig_enabled = values['enabled']
            self.mask_enabled_attribute(values)
        elif self.enabled_invert and not self.enabled_emulation:
            orig_enabled = values['enabled']
            if orig_enabled is not None:
                values['enabled'] = not orig_enabled
            else:
                values['enabled'] = self.enabled_default
        values = super(UserApi, self).create(values)
        if self.enabled_mask or (self.enabled_invert and
                                 not self.enabled_emulation):
            values['enabled'] = orig_enabled
        return values

    def get_filtered(self, user_id):
        user = self.get(user_id)
        return self.filter_attributes(user)

    def get_all_filtered(self, hints):
        query = self.filter_query(hints)
        return [self.filter_attributes(user) for user in self.get_all(query)]

    def filter_attributes(self, user):
        return identity.filter_user(common_ldap.filter_entity(user))

    def is_user(self, dn):
        """Returns True if the entry is a user."""

        # NOTE(blk-u): It's easy to check if the DN is under the User tree,
        # but may not be accurate. A more accurate test would be to fetch the
        # entry to see if it's got the user objectclass, but this could be
        # really expensive considering how this is used.

        return common_ldap.dn_startswith(dn, self.tree_dn)


class GroupApi(common_ldap.BaseLdap):
    DEFAULT_OU = 'ou=UserGroups'
    DEFAULT_STRUCTURAL_CLASSES = []
    DEFAULT_OBJECTCLASS = 'groupOfNames'
    DEFAULT_ID_ATTR = 'cn'
    DEFAULT_MEMBER_ATTRIBUTE = 'member'
    NotFound = exception.GroupNotFound
    options_name = 'group'
    attribute_options_names = {'description': 'desc',
                               'name': 'name'}
    immutable_attrs = ['name']
    model = models.Group

    def _ldap_res_to_model(self, res):
        model = super(GroupApi, self)._ldap_res_to_model(res)
        model['dn'] = res[0]
        return model

    def __init__(self, conf):
        super(GroupApi, self).__init__(conf)
        self.member_attribute = (conf.ldap.group_member_attribute
                                 or self.DEFAULT_MEMBER_ATTRIBUTE)

    def create(self, values):
        data = values.copy()
        if data.get('id') is None:
            data['id'] = uuid.uuid4().hex
        if 'description' in data and data['description'] in ['', None]:
            data.pop('description')
        return super(GroupApi, self).create(data)

    def delete(self, group_id):
        if self.subtree_delete_enabled:
            super(GroupApi, self).deleteTree(group_id)
        else:
            # TODO(spzala): this is only placeholder for group and domain
            # role support which will be added under bug 1101287

            group_ref = self.get(group_id)
            group_dn = group_ref['dn']
            if group_dn:
                self._delete_tree_nodes(group_dn, ldap.SCOPE_ONELEVEL)
            super(GroupApi, self).delete(group_id)

    def update(self, group_id, values):
        old_obj = self.get(group_id)
        return super(GroupApi, self).update(group_id, values, old_obj)

    def add_user(self, user_dn, group_id, user_id):
        group_ref = self.get(group_id)
        group_dn = group_ref['dn']
        try:
            super(GroupApi, self).add_member(user_dn, group_dn)
        except exception.Conflict:
            raise exception.Conflict(_(
                'User %(user_id)s is already a member of group %(group_id)s') %
                {'user_id': user_id, 'group_id': group_id})

    def remove_user(self, user_dn, group_id, user_id):
        group_ref = self.get(group_id)
        group_dn = group_ref['dn']
        try:
            super(GroupApi, self).remove_member(user_dn, group_dn)
        except ldap.NO_SUCH_ATTRIBUTE:
            raise exception.UserNotFound(user_id=user_id)

    def list_user_groups(self, user_dn):
        """Return a list of groups for which the user is a member."""

        user_dn_esc = ldap.filter.escape_filter_chars(user_dn)
        query = '(%s=%s)%s' % (self.member_attribute,
                               user_dn_esc,
                               self.ldap_filter or '')
        return self.get_all(query)

    def list_user_groups_filtered(self, user_dn, hints):
        """Return a filtered list of groups for which the user is a member."""

        user_dn_esc = ldap.filter.escape_filter_chars(user_dn)
        query = '(%s=%s)%s' % (self.member_attribute,
                               user_dn_esc,
                               self.ldap_filter or '')
        return self.get_all_filtered(hints, query)

    def list_group_users(self, group_id):
        """Return a list of user dns which are members of a group."""
        group_ref = self.get(group_id)
        group_dn = group_ref['dn']

        try:
            attrs = self._ldap_get_list(group_dn, ldap.SCOPE_BASE,
                                        attrlist=[self.member_attribute])
        except ldap.NO_SUCH_OBJECT:
            raise self.NotFound(group_id=group_id)

        users = []
        for dn, member in attrs:
            user_dns = member.get(self.member_attribute, [])
            for user_dn in user_dns:
                if self._is_dumb_member(user_dn):
                    continue
                users.append(user_dn)
        return users

    def get_filtered(self, group_id):
        group = self.get(group_id)
        return common_ldap.filter_entity(group)

    def get_filtered_by_name(self, group_name):
        group = self.get_by_name(group_name)
        return common_ldap.filter_entity(group)

    def get_all_filtered(self, hints, query=None):
        query = self.filter_query(hints, query)
        return [common_ldap.filter_entity(group)
                for group in self.get_all(query)]