summaryrefslogtreecommitdiffstats
path: root/ipalib/plugins/hbacrule.py
blob: b4398b85b30c59183e3ac273bdd3b1038baa3ece (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
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
# Authors:
#   Pavel Zuna <pzuna@redhat.com>
#
# Copyright (C) 2009  Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
"""
Host-based access control

Control who can access what services on what hosts and from where. You
can use HBAC to control which users or groups on a source host can
access a service, or group of services, on a target host.

You can also specify a category of users, target hosts, and source
hosts. This is currently limited to "all", but might be expanded in the
future.

Target hosts and source hosts in HBAC rules must be hosts managed by IPA.

The available services and groups of services are controlled by the
hbacsvc and hbacsvcgroup plug-ins respectively.

EXAMPLES:

 Create a rule, "test1", that grants all users access to the host "server" from
 anywhere:
   ipa hbacrule-add --type=allow --usercat=all --srchostcat=all test1
   ipa hbacrule-add-host --hosts=server.example.com test1

 Display the properties of a named HBAC rule:
   ipa hbacrule-show test1

 Create a rule for a specific service. This lets the user john access
 the sshd service on any machine from any machine:
   ipa hbacrule-add --type=allow --hostcat=all --srchostcat=all john_sshd
   ipa hbacrule-add-user --users=john john_sshd
   ipa hbacrule-add-service --hbacsvcs=sshd john_sshd

 Create a rule for a new service group. This lets the user john access
 the FTP service on any machine from any machine:
   ipa hbacsvcgroup-add ftpers
   ipa hbacsvc-add sftp
   ipa hbacsvcgroup-add-member --hbacsvcs=ftp,sftp ftpers
   ipa hbacrule-add --type=allow --hostcat=all --srchostcat=all john_ftp
   ipa hbacrule-add-user --users=john john_ftp
   ipa hbacrule-add-service --hbacsvcgroups=ftpers john_ftp

 Disable a named HBAC rule:
   ipa hbacrule-disable test1

 Remove a named HBAC rule:
   ipa hbacrule-del allow_server
"""


# AccessTime support is being removed for now.
#
# You can also control the times that the rule is active.
#
# The access time(s) of a host are cumulative and are not guaranteed to be
# applied in the order displayed.
#
# Specify that the rule "test1" be active every day between 0800 and 1400:
#   ipa hbacrule-add-accesstime --time='periodic daily 0800-1400' test1
#
# Specify that the rule "test1" be active once, from 10:32 until 10:33 on
# December 16, 2010:
#   ipa hbacrule-add-accesstime --time='absolute 201012161032 ~ 201012161033' test1


from ipalib import api, errors
from ipalib import AccessTime, Password, Str, StrEnum
from ipalib.plugins.baseldap import *
from ipalib import _, ngettext

topic = ('hbac', 'Host-based access control commands')

def is_all(options, attribute):
    """
    See if options[attribute] is lower-case 'all' in a safe way.
    """
    if attribute in options and \
        options[attribute] is not None and \
        options[attribute].lower() == 'all':
        return True
    else:
        return False


class hbacrule(LDAPObject):
    """
    HBAC object.
    """
    container_dn = api.env.container_hbac
    object_name = _('HBAC rule')
    object_name_plural = _('HBAC rules')
    object_class = ['ipaassociation', 'ipahbacrule']
    default_attributes = [
        'cn', 'accessruletype', 'ipaenabledflag',
        'description', 'usercategory', 'hostcategory',
        'sourcehostcategory', 'servicecategory', 'ipaenabledflag',
        'memberuser', 'sourcehost', 'memberhost', 'memberservice',
        'memberhostgroup',
    ]
    uuid_attribute = 'ipauniqueid'
    rdn_attribute = 'ipauniqueid'
    attribute_members = {
        'memberuser': ['user', 'group'],
        'memberhost': ['host', 'hostgroup'],
        'sourcehost': ['host', 'hostgroup'],
        'memberservice': ['hbacsvc', 'hbacsvcgroup'],
    }

    label = _('HBAC Rules')
    label_singular = _('HBAC rule')

    takes_params = (
        Str('cn',
            cli_name='name',
            label=_('Rule name'),
            primary_key=True,
        ),
        StrEnum('accessruletype',
            cli_name='type',
            doc=_('Rule type (allow or deny)'),
            label=_('Rule type'),
            values=(u'allow', u'deny'),
        ),
        # FIXME: {user,host,sourcehost,service}categories should expand in the future
        StrEnum('usercategory?',
            cli_name='usercat',
            label=_('User category'),
            doc=_('User category the rule applies to'),
            values=(u'all', ),
        ),
        StrEnum('hostcategory?',
            cli_name='hostcat',
            label=_('Host category'),
            doc=_('Host category the rule applies to'),
            values=(u'all', ),
        ),
        StrEnum('sourcehostcategory?',
            cli_name='srchostcat',
            label=_('Source host category'),
            doc=_('Source host category the rule applies to'),
            values=(u'all', ),
        ),
        StrEnum('servicecategory?',
            cli_name='servicecat',
            label=_('Service category'),
            doc=_('Service category the rule applies to'),
            values=(u'all', ),
        ),
#        AccessTime('accesstime?',
#            cli_name='time',
#            label=_('Access time'),
#        ),
        Str('description?',
            cli_name='desc',
            label=_('Description'),
        ),
        Flag('ipaenabledflag?',
             label=_('Enabled'),
             flags=['no_create', 'no_update', 'no_search'],
        ),
        Str('memberuser_user?',
            label=_('Users'),
            flags=['no_create', 'no_update', 'no_search'],
        ),
        Str('memberuser_group?',
            label=_('Groups'),
            flags=['no_create', 'no_update', 'no_search'],
        ),
        Str('memberhost_host?',
            label=_('Hosts'),
            flags=['no_create', 'no_update', 'no_search'],
        ),
        Str('memberhost_hostgroup?',
            label=_('Host Groups'),
            flags=['no_create', 'no_update', 'no_search'],
        ),
        Str('sourcehost_host?',
            label=_('Source hosts'),
            flags=['no_create', 'no_update', 'no_search'],
        ),
        Str('sourcehost_hostgroup?',
            label=_('Source host groups'),
            flags=['no_create', 'no_update', 'no_search'],
        ),
        Str('memberservice_hbacsvc?',
            label=_('Services'),
            flags=['no_create', 'no_update', 'no_search'],
        ),
        Str('memberservice_hbacsvcgroup?',
            label=_('Service Groups'),
            flags=['no_create', 'no_update', 'no_search'],
        ),
    )

api.register(hbacrule)


class hbacrule_add(LDAPCreate):
    """
    Create a new HBAC rule.
    """

    msg_summary = _('Added HBAC rule "%(value)s"')

    def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
        # HBAC rules are enabled by default
        entry_attrs['ipaenabledflag'] = 'TRUE'
        return dn

api.register(hbacrule_add)


class hbacrule_del(LDAPDelete):
    """
    Delete an HBAC rule.
    """

    msg_summary = _('Deleted HBAC rule "%(value)s"')

api.register(hbacrule_del)


class hbacrule_mod(LDAPUpdate):
    """
    Modify an HBAC rule.
    """

    msg_summary = _('Modified HBAC rule "%(value)s"')

    def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
        try:
            (dn, entry_attrs) = ldap.get_entry(dn, attrs_list)
        except errors.NotFound:
            self.obj.handle_not_found(*keys)

        if is_all(options, 'usercategory') and 'memberuser' in entry_attrs:
            raise errors.MutuallyExclusiveError(reason="user category cannot be set to 'all' while there are allowed users")
        if is_all(options, 'hostcategory') and 'memberhost' in entry_attrs:
            raise errors.MutuallyExclusiveError(reason="host category cannot be set to 'all' while there are allowed hosts")
        if is_all(options, 'sourcehostcategory') and 'sourcehost' in entry_attrs:
            raise errors.MutuallyExclusiveError(reason="sourcehost category cannot be set to 'all' while there are allowed source hosts")
        if is_all(options, 'servicecategory') and 'memberservice' in entry_attrs:
            raise errors.MutuallyExclusiveError(reason="service category cannot be set to 'all' while there are allowed services")
        return dn

api.register(hbacrule_mod)


class hbacrule_find(LDAPSearch):
    """
    Search for HBAC rules.
    """

    msg_summary = ngettext(
        '%(count)d HBAC rule matched', '%(count)d HBAC rules matched', 0
    )

api.register(hbacrule_find)


class hbacrule_show(LDAPRetrieve):
    """
    Display the properties of an HBAC rule.
    """

api.register(hbacrule_show)


class hbacrule_enable(LDAPQuery):
    """
    Enable an HBAC rule.
    """

    msg_summary = _('Enabled HBAC rule "%(value)s"')
    has_output = output.standard_value

    def execute(self, cn):
        ldap = self.obj.backend

        dn = self.obj.get_dn(cn)
        entry_attrs = {'ipaenabledflag': 'TRUE'}

        try:
            ldap.update_entry(dn, entry_attrs)
        except errors.EmptyModlist:
            pass
        except errors.NotFound:
            self.obj.handle_not_found(cn)

        return dict(
            result=True,
            value=cn,
        )

api.register(hbacrule_enable)


class hbacrule_disable(LDAPQuery):
    """
    Disable an HBAC rule.
    """

    msg_summary = _('Disabled HBAC rule "%(value)s"')
    has_output = output.standard_value

    def execute(self, cn):
        ldap = self.obj.backend

        dn = self.obj.get_dn(cn)
        entry_attrs = {'ipaenabledflag': 'FALSE'}

        try:
            ldap.update_entry(dn, entry_attrs)
        except errors.EmptyModlist:
            pass
        except errors.NotFound:
            self.obj.handle_not_found(cn)

        return dict(
            result=True,
            value=cn,
        )

api.register(hbacrule_disable)


class hbacrule_add_accesstime(LDAPQuery):
    """
    Add an access time to an HBAC rule.
    """

    takes_options = (
        AccessTime('accesstime',
            cli_name='time',
            label=_('Access time'),
        ),
    )

    def execute(self, cn, **options):
        ldap = self.obj.backend

        dn = self.obj.get_dn(cn)

        (dn, entry_attrs) = ldap.get_entry(dn, ['accesstime'])
        entry_attrs.setdefault('accesstime', []).append(
            options['accesstime']
        )
        try:
            ldap.update_entry(dn, entry_attrs)
        except errors.EmptyModlist:
            pass
        except errors.NotFound:
            self.obj.handle_not_found(cn)

        return dict(result=True)

    def output_for_cli(self, textui, result, cn, **options):
        textui.print_name(self.name)
        textui.print_dashed(
            'Added access time "%s" to HBAC rule "%s"' % (
                options['accesstime'], cn
            )
        )

#api.register(hbacrule_add_accesstime)


class hbacrule_remove_accesstime(LDAPQuery):
    """
    Remove access time to HBAC rule.
    """
    takes_options = (
        AccessTime('accesstime?',
            cli_name='time',
            label=_('Access time'),
        ),
    )

    def execute(self, cn, **options):
        ldap = self.obj.backend

        dn = self.obj.get_dn(cn)

        (dn, entry_attrs) = ldap.get_entry(dn, ['accesstime'])
        try:
            entry_attrs.setdefault('accesstime', []).remove(
                options['accesstime']
            )
            ldap.update_entry(dn, entry_attrs)
        except (ValueError, errors.EmptyModlist):
            pass
        except errors.NotFound:
            self.obj.handle_not_found(cn)

        return dict(result=True)

    def output_for_cli(self, textui, result, cn, **options):
        textui.print_name(self.name)
        textui.print_dashed(
            'Removed access time "%s" from HBAC rule "%s"' % (
                options['accesstime'], cn
            )
        )

#api.register(hbacrule_remove_accesstime)


class hbacrule_add_user(LDAPAddMember):
    """
    Add users and groups to an HBAC rule.
    """
    member_attributes = ['memberuser']
    member_count_out = ('%i object added.', '%i objects added.')

    def pre_callback(self, ldap, dn, found, not_found, *keys, **options):
        (dn, entry_attrs) = ldap.get_entry(dn, self.obj.default_attributes)
        if 'usercategory' in entry_attrs and \
            entry_attrs['usercategory'][0].lower() == 'all':
            raise errors.MutuallyExclusiveError(reason="users cannot be added when user category='all'")
        return dn

api.register(hbacrule_add_user)


class hbacrule_remove_user(LDAPRemoveMember):
    """
    Remove users and groups from an HBAC rule.
    """
    member_attributes = ['memberuser']
    member_count_out = ('%i object removed.', '%i objects removed.')

api.register(hbacrule_remove_user)


class hbacrule_add_host(LDAPAddMember):
    """
    Add target hosts and hostgroups to an HBAC rule
    """
    member_attributes = ['memberhost']
    member_count_out = ('%i object added.', '%i objects added.')

    def pre_callback(self, ldap, dn, found, not_found, *keys, **options):
        (dn, entry_attrs) = ldap.get_entry(dn, self.obj.default_attributes)
        if 'hostcategory' in entry_attrs and \
            entry_attrs['hostcategory'][0].lower() == 'all':
            raise errors.MutuallyExclusiveError(reason="hosts cannot be added when host category='all'")
        return dn

api.register(hbacrule_add_host)


class hbacrule_remove_host(LDAPRemoveMember):
    """
    Remove target hosts and hostgroups from an HBAC rule.
    """
    member_attributes = ['memberhost']
    member_count_out = ('%i object removed.', '%i objects removed.')

api.register(hbacrule_remove_host)


class hbacrule_add_sourcehost(LDAPAddMember):
    """
    Add source hosts and hostgroups from a HBAC rule.
    """
    member_attributes = ['sourcehost']
    member_count_out = ('%i object added.', '%i objects added.')

    def pre_callback(self, ldap, dn, found, not_found, *keys, **options):
        (dn, entry_attrs) = ldap.get_entry(dn, self.obj.default_attributes)
        if 'sourcehostcategory' in entry_attrs and \
            entry_attrs['sourcehostcategory'][0].lower() == 'all':
            raise errors.MutuallyExclusiveError(reason="source hosts cannot be added when sourcehost category='all'")
        return dn

api.register(hbacrule_add_sourcehost)


class hbacrule_remove_sourcehost(LDAPRemoveMember):
    """
    Remove source hosts and hostgroups from an HBAC rule.
    """
    member_attributes = ['sourcehost']
    member_count_out = ('%i object removed.', '%i objects removed.')

api.register(hbacrule_remove_sourcehost)


class hbacrule_add_service(LDAPAddMember):
    """
    Add services to an HBAC rule.
    """
    member_attributes = ['memberservice']
    member_count_out = ('%i object added.', '%i objects added.')

    def pre_callback(self, ldap, dn, found, not_found, *keys, **options):
        (dn, entry_attrs) = ldap.get_entry(dn, self.obj.default_attributes)
        if 'servicecategory' in entry_attrs and \
            entry_attrs['servicecategory'][0].lower() == 'all':
            raise errors.MutuallyExclusiveError(reason="services cannot be added when service category='all'")
        return dn

api.register(hbacrule_add_service)


class hbacrule_remove_service(LDAPRemoveMember):
    """
    Remove service and service groups from an HBAC rule.
    """
    member_attributes = ['memberservice']
    member_count_out = ('%i object removed.', '%i objects removed.')

api.register(hbacrule_remove_service)