summaryrefslogtreecommitdiffstats
path: root/ipalib/plugins/host.py
blob: 1cd3fc061852b9caea749cd0fb82e6170f513e4e (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
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
# Authors:
#   Rob Crittenden <rcritten@redhat.com>
#   Pavel Zuna <pzuna@redhat.com>
#
# Copyright (C) 2008  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/>.
"""
Hosts/Machines

A host represents a machine. It can be used in a number of contexts:
- service entries are associated with a host
- a host stores the host/ service principal
- a host can be used in Host-based Access Control (HBAC) rules
- every enrolled client generates a host entry

ENROLLMENT:

There are three enrollment scenarios when enrolling a new client:

1. You are enrolling as a full administrator. The host entry may exist
   or not. A full administrator is a member of the hostadmin role
   or the admins group.
2. You are enrolling as a limited administrator. The host must already
   exist. A limited administrator is a member a role with the
   Host Enrollment privilege.
3. The host has been created with a one-time password.

A host can only be enrolled once. If a client has enrolled and needs to
be re-enrolled, the host entry must be removed and re-created. Note that
re-creating the host entry will result in all services for the host being
removed, and all SSL certificates associated with those services being
revoked.

A host can optionally store information such as where it is located,
the OS that it runs, etc.

EXAMPLES:

 Add a new host:
   ipa host-add --location="3rd floor lab" --locality=Dallas test.example.com

 Delete a host:
   ipa host-del test.example.com

 Add a new host with a one-time password:
   ipa host-add --os='Fedora 12' --password=Secret123 test.example.com

 Add a new host with a random one-time password:
   ipa host-add --os='Fedora 12' --random test.example.com

 Modify information about a host:
   ipa host-mod --os='Fedora 12' test.example.com

 Disable the host Kerberos key, SSL certificate and all of its services:
   ipa host-disable test.example.com

 Add a host that can manage this host's keytab and certificate:
   ipa host-add-managedby --hosts=test2 test
"""

import platform
import os
import sys
from nss.error import NSPRError

from ipalib import api, errors, util
from ipalib import Str, Flag, Bytes
from ipalib.plugins.baseldap import *
from ipalib.plugins.service import split_principal
from ipalib.plugins.service import validate_certificate
from ipalib.plugins.service import set_certificate_attrs
from ipalib.plugins.dns import dns_container_exists, _record_types
from ipalib.plugins.dns import add_forward_record
from ipalib import _, ngettext
from ipalib import x509
from ipapython.ipautil import ipa_generate_password, CheckedIPAddress
from ipalib.request import context
import base64
import nss.nss as nss
import netaddr


def validate_host(ugettext, fqdn):
    """
    Require at least one dot in the hostname (to support localhost.localdomain)
    """
    if fqdn.find('.') == -1:
        return _('Fully-qualified hostname required')
    return None

def is_forward_record(zone, str_address):
    addr = netaddr.IPAddress(str_address)
    if addr.version == 4:
        result = api.Command['dnsrecord_find'](zone, arecord=str_address)
    elif addr.version == 6:
        result = api.Command['dnsrecord_find'](zone, aaaarecord=str_address)
    else:
        raise ValueError('Invalid address family')

    return result['count'] > 0

def get_reverse_zone(ipaddr, prefixlen=None):
    ip = netaddr.IPAddress(ipaddr)
    revdns = unicode(ip.reverse_dns)

    if prefixlen is None:
        revzone = u''

        result = api.Command['dnszone_find']()['result']
        for zone in result:
            zonename = zone['idnsname'][0]
            if revdns.endswith(zonename) and len(zonename) > len(revzone):
                revzone = zonename
    else:
        if ip.version == 4:
            pos = 4 - prefixlen / 8
        elif ip.version == 6:
            pos = 32 - prefixlen / 4
        items = ip.reverse_dns.split('.')
        revzone = u'.'.join(items[pos:])

        try:
            api.Command['dnszone_show'](revzone)
        except errors.NotFound:
            revzone = u''

    if len(revzone) == 0:
        raise errors.NotFound(
            reason=_('DNS reverse zone for IP address %(addr)s not found') % dict(addr=ipaddr)
        )

    revname = revdns[:-len(revzone)-1]

    return revzone, revname

def remove_fwd_ptr(ipaddr, host, domain, recordtype):
    api.log.debug('deleting ipaddr %s' % ipaddr)
    try:
        revzone, revname = get_reverse_zone(ipaddr)
        delkw = { 'ptrrecord' : "%s.%s." % (host, domain) }
        api.Command['dnsrecord_del'](revzone, revname, **delkw)
    except errors.NotFound:
        pass

    try:
        delkw = { recordtype : ipaddr }
        api.Command['dnsrecord_del'](domain, host, **delkw)
    except errors.NotFound:
        pass

host_output_params = (
    Flag('has_keytab',
        label=_('Keytab'),
    ),
    Str('managedby_host',
        label='Managed by',
    ),
    Str('managing_host',
        label='Managing',
    ),
    Str('subject',
        label=_('Subject'),
    ),
    Str('serial_number',
        label=_('Serial Number'),
    ),
    Str('issuer',
        label=_('Issuer'),
    ),
    Str('valid_not_before',
        label=_('Not Before'),
    ),
    Str('valid_not_after',
        label=_('Not After'),
    ),
    Str('md5_fingerprint',
        label=_('Fingerprint (MD5)'),
    ),
    Str('sha1_fingerprint',
        label=_('Fingerprint (SHA1)'),
    ),
    Str('revocation_reason?',
        label=_('Revocation reason'),
    ),
)

def validate_ipaddr(ugettext, ipaddr):
    """
    Verify that we have either an IPv4 or IPv6 address.
    """
    try:
        ip = CheckedIPAddress(ipaddr, match_local=False)
    except:
        return _('invalid IP address')
    return None


class host(LDAPObject):
    """
    Host object.
    """
    container_dn = api.env.container_host
    object_name = 'host'
    object_name_plural = 'hosts'
    object_class = ['ipaobject', 'nshost', 'ipahost', 'pkiuser', 'ipaservice']
    # object_class_config = 'ipahostobjectclasses'
    search_attributes = [
        'fqdn', 'description', 'l', 'nshostlocation', 'krbprincipalname',
        'nshardwareplatform', 'nsosversion', 'managedby'
    ]
    default_attributes = [
        'fqdn', 'description', 'l', 'nshostlocation', 'krbprincipalname',
        'nshardwareplatform', 'nsosversion', 'usercertificate', 'memberof',
        'krblastpwdchange', 'managedby', 'memberindirect', 'memberofindirect',
    ]
    uuid_attribute = 'ipauniqueid'
    attribute_members = {
        'enrolledby': ['user'],
        'memberof': ['hostgroup', 'netgroup', 'role', 'hbacrule', 'sudorule'],
        'managedby': ['host'],
        'managing': ['host'],
        'memberofindirect': ['hostgroup', 'netgroup', 'role', 'hbacrule',
        'sudorule'],
    }
    bindable = True
    relationships = {
        'memberof': ('Member Of', 'in_', 'not_in_'),
        'enrolledby': ('Enrolled by', 'enroll_by_', 'not_enroll_by_'),
        'managedby': ('Managed by', 'man_by_', 'not_man_by_'),
        'managing': ('Managing', 'man_', 'not_man_'),
    }

    label = _('Hosts')

    takes_params = (
        Str('fqdn', validate_host,
            cli_name='hostname',
            label=_('Host name'),
            primary_key=True,
            normalizer=lambda value: value.lower(),
        ),
        Str('description?',
            cli_name='desc',
            label=_('Description'),
            doc=_('A description of this host'),
        ),
        Str('l?',
            cli_name='locality',
            label=_('Locality'),
            doc=_('Host locality (e.g. "Baltimore, MD")'),
        ),
        Str('nshostlocation?',
            cli_name='location',
            label=_('Location'),
            doc=_('Host location (e.g. "Lab 2")'),
        ),
        Str('nshardwareplatform?',
            cli_name='platform',
            label=_('Platform'),
            doc=_('Host hardware platform (e.g. "Lenovo T61")'),
        ),
        Str('nsosversion?',
            cli_name='os',
            label=_('Operating system'),
            doc=_('Host operating system and version (e.g. "Fedora 9")'),
        ),
        Str('userpassword?',
            cli_name='password',
            label=_('User password'),
            doc=_('Password used in bulk enrollment'),
        ),
        Flag('random?',
            doc=_('Generate a random password to be used in bulk enrollment'),
            flags=['no_search'],
            default=False,
        ),
        Str('randompassword?',
            label=_('Random password'),
            flags=['no_create', 'no_update', 'no_search'],
        ),
        Bytes('usercertificate?', validate_certificate,
            cli_name='certificate',
            label=_('Certificate'),
            doc=_('Base-64 encoded server certificate'),
        ),
        Str('krbprincipalname?',
            label=_('Principal name'),
            flags=['no_create', 'no_update', 'no_search'],
        ),
    )

    def get_dn(self, *keys, **options):
        hostname = keys[-1]
        if hostname.endswith('.'):
            hostname = hostname[:-1]
        dn = super(host, self).get_dn(hostname, **options)
        try:
            self.backend.get_entry(dn, [''])
        except errors.NotFound:
            try:
                (dn, entry_attrs) = self.backend.find_entry_by_attr(
                    'serverhostname', hostname, self.object_class, [''],
                    self.container_dn
                )
            except errors.NotFound:
                pass
        return dn

    def get_managed_hosts(self, dn):
        host_filter = 'managedBy=%s' % dn
        host_attrs = ['fqdn']
        ldap = self.api.Backend.ldap2
        managed_hosts = []

        try:
            (hosts, truncated) = ldap.find_entries(base_dn=self.container_dn,
                                    filter=host_filter, attrs_list=host_attrs)

            for host in hosts:
                managed_hosts.append(host[0])
        except errors.NotFound:
            return []

        return managed_hosts

api.register(host)


class host_add(LDAPCreate):
    """
    Add a new host.
    """

    has_output_params = LDAPCreate.has_output_params + host_output_params
    msg_summary = _('Added host "%(value)s"')
    member_attributes = ['managedby']
    takes_options = (
        Flag('force',
            label=_('Force'),
            doc=_('force host name even if not in DNS'),
        ),
        Flag('no_reverse',
            doc=_('skip reverse DNS detection'),
        ),
        Str('ip_address?', validate_ipaddr,
            doc=_('Add the host to DNS with this IP address'),
            label=_('IP Address'),
        ),
    )

    def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
        if 'ip_address' in options and dns_container_exists(ldap):
            parts = keys[-1].split('.')
            domain = unicode('.'.join(parts[1:]))
            result = api.Command['dnszone_find']()['result']
            match = False
            for zone in result:
                if domain == zone['idnsname'][0]:
                    match = True
                    break
            if not match:
                raise errors.NotFound(
                    reason=_('DNS zone %(zone)s not found') % dict(zone=domain)
                )
            ip = CheckedIPAddress(options['ip_address'], match_local=False)
            if not options.get('no_reverse', False):
                try:
                    prefixlen = None
                    if not ip.defaultnet:
                        prefixlen = ip.prefixlen
                    # we prefer lookup of the IP through the reverse zone
                    revzone, revname = get_reverse_zone(ip, prefixlen)
                    reverse = api.Command['dnsrecord_find'](revzone, idnsname=revname)
                    if reverse['count'] > 0:
                        raise errors.DuplicateEntry(message=u'This IP address is already assigned.')
                except errors.NotFound:
                    pass
            else:
                if is_forward_record(domain, unicode(ip)):
                    raise errors.DuplicateEntry(message=u'This IP address is already assigned.')
        if not options.get('force', False) and not 'ip_address' in options:
            util.validate_host_dns(self.log, keys[-1])
        if 'locality' in entry_attrs:
            entry_attrs['l'] = entry_attrs['locality']
            del entry_attrs['locality']
        entry_attrs['cn'] = keys[-1]
        entry_attrs['serverhostname'] = keys[-1].split('.', 1)[0]
        if 'userpassword' not in entry_attrs and not options.get('random', False):
            entry_attrs['krbprincipalname'] = 'host/%s@%s' % (
                keys[-1], self.api.env.realm
            )
            if 'krbprincipalaux' not in entry_attrs['objectclass']:
                entry_attrs['objectclass'].append('krbprincipalaux')
            if 'krbprincipal' not in entry_attrs['objectclass']:
                entry_attrs['objectclass'].append('krbprincipal')
        else:
            if 'krbprincipalaux' in entry_attrs['objectclass']:
                entry_attrs['objectclass'].remove('krbprincipalaux')
            if 'krbprincipal' in entry_attrs['objectclass']:
                entry_attrs['objectclass'].remove('krbprincipal')
        if 'random' in options:
            if options.get('random'):
                entry_attrs['userpassword'] = ipa_generate_password()
                # save the password so it can be displayed in post_callback
                setattr(context, 'randompassword', entry_attrs['userpassword'])
            del entry_attrs['random']
        cert = options.get('usercertificate')
        if cert:
            cert = x509.normalize_certificate(cert)
            x509.verify_cert_subject(ldap, keys[-1], cert)
            entry_attrs['usercertificate'] = cert
        entry_attrs['managedby'] = dn
        return dn

    def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
        exc = None
        try:
            if 'ip_address' in options and dns_container_exists(ldap):
                parts = keys[-1].split('.')
                domain = unicode('.'.join(parts[1:]))

                ip = CheckedIPAddress(options['ip_address'], match_local=False)
                add_forward_record(domain, parts[0], unicode(ip))

                if not options.get('no_reverse', False):
                    try:
                        prefixlen = None
                        if not ip.defaultnet:
                            prefixlen = ip.prefixlen
                        revzone, revname = get_reverse_zone(ip, prefixlen)
                        addkw = { 'ptrrecord' : keys[-1]+'.' }
                        api.Command['dnsrecord_add'](revzone, revname, **addkw)
                    except errors.EmptyModlist:
                        # the entry already exists and matches
                        pass

                del options['ip_address']
        except Exception, e:
            exc = e
        if options.get('random', False):
            try:
                entry_attrs['randompassword'] = unicode(getattr(context, 'randompassword'))
            except AttributeError:
                # On the off-chance some other extension deletes this from the
                # context, don't crash.
                pass
        if exc:
            raise errors.NonFatalError(
                reason=_('The host was added but the DNS update failed with: %(exc)s') % dict(exc=exc)
            )
        set_certificate_attrs(entry_attrs)

        if options.get('all', False):
                entry_attrs['managing'] = self.obj.get_managed_hosts(dn)

        return dn

api.register(host_add)


class host_del(LDAPDelete):
    """
    Delete a host.
    """

    msg_summary = _('Deleted host "%(value)s"')
    member_attributes = ['managedby']

    takes_options = (
        Flag('updatedns?',
            doc=_('Remove entries from DNS'),
            default=False,
        ),
    )

    def pre_callback(self, ldap, dn, *keys, **options):
        # If we aren't given a fqdn, find it
        if validate_host(None, keys[-1]) is not None:
            hostentry = api.Command['host_show'](keys[-1])['result']
            fqdn = hostentry['fqdn'][0]
        else:
            fqdn = keys[-1]
        # Remove all service records for this host
        truncated = True
        while truncated:
            try:
                ret = api.Command['service_find'](fqdn)
                truncated = ret['truncated']
                services = ret['result']
            except errors.NotFound:
                break
            else:
                for entry_attrs in services:
                    principal = entry_attrs['krbprincipalname'][0]
                    (service, hostname, realm) = split_principal(principal)
                    if hostname.lower() == fqdn:
                        api.Command['service_del'](principal)
        updatedns = options.get('updatedns', False)
        if updatedns:
            try:
                updatedns = dns_container_exists(ldap)
            except errors.NotFound:
                updatedns = False

        if updatedns:
            # Remove DNS entries
            parts = fqdn.split('.')
            domain = unicode('.'.join(parts[1:]))
            result = api.Command['dnszone_find']()['result']
            match = False
            for zone in result:
                if domain == zone['idnsname'][0]:
                    match = True
                    break
            if not match:
                raise errors.NotFound(
                    reason=_('DNS zone %(zone)s not found') % dict(zone=domain)
                )
            # Get all forward resources for this host
            records = api.Command['dnsrecord_find'](domain, idnsname=parts[0])['result']
            for record in records:
                if 'arecord' in record:
                    remove_fwd_ptr(record['arecord'][0], parts[0],
                                   domain, 'arecord')
                if 'aaaarecord' in record:
                    remove_fwd_ptr(record['aaaarecord'][0], parts[0],
                                   domain, 'aaaarecord')
                else:
                    # Try to delete all other record types too
                    _attribute_types = [str('%srecord' % t.lower()) for t in _record_types]
                    for attr in _attribute_types:
                        if attr not in ['arecord', 'aaaarecord'] and attr in record:
                            for i in xrange(len(record[attr])):
                                if (record[attr][i].endswith(parts[0]) or
                                    record[attr][i].endswith(fqdn+'.')):
                                    delkw = { unicode(attr) : record[attr][i] }
                                    api.Command['dnsrecord_del'](domain,
                                            record['idnsname'][0],
                                            **delkw)
                            break

        try:
            (dn, entry_attrs) = ldap.get_entry(dn, ['usercertificate'])
        except errors.NotFound:
            self.obj.handle_not_found(*keys)

        if 'usercertificate' in entry_attrs:
            cert = x509.normalize_certificate(entry_attrs.get('usercertificate')[0])
            try:
                serial = unicode(x509.get_serial_number(cert, x509.DER))
                try:
                    result = api.Command['cert_show'](unicode(serial))['result'
]
                    if 'revocation_reason' not in result:
                        try:
                            api.Command['cert_revoke'](unicode(serial), revocation_reason=4)
                        except errors.NotImplementedError:
                            # some CA's might not implement revoke
                            pass
                except errors.NotImplementedError:
                    # some CA's might not implement revoke
                    pass
            except NSPRError, nsprerr:
                if nsprerr.errno == -8183:
                    # If we can't decode the cert them proceed with
                    # removing the host.
                    self.log.info("Problem decoding certificate %s" % nsprerr.args[1])
                else:
                    raise nsprerr

        return dn

api.register(host_del)


class host_mod(LDAPUpdate):
    """
    Modify information about a host.
    """

    has_output_params = LDAPUpdate.has_output_params + host_output_params
    msg_summary = _('Modified host "%(value)s"')
    member_attributes = ['managedby']

    takes_options = LDAPUpdate.takes_options + (
        Str('krbprincipalname?',
            cli_name='principalname',
            label=_('Principal name'),
            doc=_('Kerberos principal name for this host'),
            attribute=True,
        ),
    )

    def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
        # Once a principal name is set it cannot be changed
        if 'cn' in entry_attrs:
            raise errors.ACIError(info='cn is immutable')
        if 'locality' in entry_attrs:
            entry_attrs['l'] = entry_attrs['locality']
            del entry_attrs['locality']
        if 'krbprincipalname' in entry_attrs:
            (dn, entry_attrs_old) = ldap.get_entry(
                dn, ['objectclass', 'krbprincipalname']
            )
            if 'krbprincipalname' in entry_attrs_old:
                msg = 'Principal name already set, it is unchangeable.'
                raise errors.ACIError(info=msg)
            obj_classes = entry_attrs_old['objectclass']
            if 'krbprincipalaux' not in obj_classes:
                obj_classes.append('krbprincipalaux')
                entry_attrs['objectclass'] = obj_classes
        cert = x509.normalize_certificate(entry_attrs.get('usercertificate'))
        if cert:
            x509.verify_cert_subject(ldap, keys[-1], cert)
            (dn, entry_attrs_old) = ldap.get_entry(dn, ['usercertificate'])
            if 'usercertificate' in entry_attrs_old:
                oldcert = x509.normalize_certificate(entry_attrs_old.get('usercertificate')[0])
                try:
                    serial = unicode(x509.get_serial_number(oldcert, x509.DER))
                    try:
                        result = api.Command['cert_show'](unicode(serial))['result']
                        if 'revocation_reason' not in result:
                            try:
                                api.Command['cert_revoke'](unicode(serial), revocation_reason=4)
                            except errors.NotImplementedError:
                                # some CA's might not implement revoke
                                pass
                    except errors.NotImplementedError:
                        # some CA's might not implement revoke
                        pass
                except NSPRError, nsprerr:
                    if nsprerr.errno == -8183:
                        # If we can't decode the cert them proceed with
                        # modifying the host.
                        self.log.info("Problem decoding certificate %s" % nsprerr.args[1])
                    else:
                        raise nsprerr

            entry_attrs['usercertificate'] = cert
        if 'random' in options:
            if options.get('random'):
                entry_attrs['userpassword'] = ipa_generate_password()
                setattr(context, 'randompassword', entry_attrs['userpassword'])
            del entry_attrs['random']

        return dn

    def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
        if options.get('random', False):
            entry_attrs['randompassword'] = unicode(getattr(context, 'randompassword'))
        set_certificate_attrs(entry_attrs)

        if options.get('all', False):
            entry_attrs['managing'] = self.obj.get_managed_hosts(dn)

        return dn

api.register(host_mod)


class host_find(LDAPSearch):
    """
    Search for hosts.
    """

    has_output_params = LDAPSearch.has_output_params + host_output_params
    msg_summary = ngettext(
        '%(count)d host matched', '%(count)d hosts matched', 0
    )
    member_attributes = ['memberof', 'enrolledby', 'managedby']

    def pre_callback(self, ldap, filter, attrs_list, base_dn, scope, *args, **options):
        if 'locality' in attrs_list:
            attrs_list.remove('locality')
            attrs_list.append('l')
        return (filter.replace('locality', 'l'), base_dn, scope)

    def post_callback(self, ldap, entries, truncated, *args, **options):
        for entry in entries:
            entry_attrs = entry[1]
            set_certificate_attrs(entry_attrs)

            if options.get('all', False):
                entry_attrs['managing'] = self.obj.get_managed_hosts(entry[0])

api.register(host_find)


class host_show(LDAPRetrieve):
    """
    Display information about a host.
    """
    has_output_params = LDAPRetrieve.has_output_params + host_output_params
    takes_options = LDAPRetrieve.takes_options + (
        Str('out?',
            doc=_('file to store certificate in'),
        ),
    )

    member_attributes = ['managedby']

    def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
        if 'krblastpwdchange' in entry_attrs:
            entry_attrs['has_keytab'] = True
            if not options.get('all', False):
                del entry_attrs['krblastpwdchange']
        else:
            entry_attrs['has_keytab'] = False

        set_certificate_attrs(entry_attrs)

        if options.get('all', False):
            entry_attrs['managing'] = self.obj.get_managed_hosts(dn)

        return dn

    def forward(self, *keys, **options):
        if 'out' in options:
            util.check_writable_file(options['out'])
            result = super(host_show, self).forward(*keys, **options)
            if 'usercertificate' in result['result']:
                x509.write_certificate(result['result']['usercertificate'][0], options['out'])
                result['summary'] = _('Certificate stored in file \'%(file)s\'') % dict(file=options['out'])
                return result
            else:
                raise errors.NoCertificateError(entry=keys[-1])
        else:
            return super(host_show, self).forward(*keys, **options)

api.register(host_show)


class host_disable(LDAPQuery):
    """
    Disable the Kerberos key, SSL certificate and all services of a host.
    """
    has_output = output.standard_value
    msg_summary = _('Disabled host "%(value)s"')

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

        # If we aren't given a fqdn, find it
        if validate_host(None, keys[-1]) is not None:
            hostentry = api.Command['host_show'](keys[-1])['result']
            fqdn = hostentry['fqdn'][0]
        else:
            fqdn = keys[-1]

        # See if we actually do anthing here, and if not raise an exception
        done_work = False

        dn = self.obj.get_dn(*keys, **options)
        try:
            (dn, entry_attrs) = ldap.get_entry(dn, ['krblastpwdchange', 'usercertificate'])
        except errors.NotFound:
            self.obj.handle_not_found(*keys)

        truncated = True
        while truncated:
            try:
                ret = api.Command['service_find'](fqdn)
                truncated = ret['truncated']
                services = ret['result']
            except errors.NotFound:
                break
            else:
                for entry_attrs in services:
                    principal = entry_attrs['krbprincipalname'][0]
                    (service, hostname, realm) = split_principal(principal)
                    if hostname.lower() == fqdn:
                        try:
                            api.Command['service_disable'](principal)
                            done_work = True
                        except errors.AlreadyInactive:
                            pass
        if 'usercertificate' in entry_attrs:
            cert = x509.normalize_certificate(entry_attrs.get('usercertificate')[0])
            try:
                serial = unicode(x509.get_serial_number(cert, x509.DER))
                try:
                    result = api.Command['cert_show'](unicode(serial))['result'
]
                    if 'revocation_reason' not in result:
                        try:
                            api.Command['cert_revoke'](unicode(serial), revocation_reason=4)
                        except errors.NotImplementedError:
                            # some CA's might not implement revoke
                            pass
                except errors.NotImplementedError:
                    # some CA's might not implement revoke
                    pass
            except NSPRError, nsprerr:
                if nsprerr.errno == -8183:
                    # If we can't decode the cert them proceed with
                    # disabling the host.
                    self.log.info("Problem decoding certificate %s" % nsprerr.args[1])
                else:
                    raise nsprerr

            # Remove the usercertificate altogether
            ldap.update_entry(dn, {'usercertificate': None})
            done_work = True

        if 'krblastpwdchange' in entry_attrs:
            ldap.remove_principal_key(dn)
            done_work = True

        if not done_work:
            raise errors.AlreadyInactive()

        return dict(
            result=True,
            value=keys[0],
        )

api.register(host_disable)

class host_add_managedby(LDAPAddMember):
    """
    Add hosts that can manage this host.
    """
    member_attributes = ['managedby']
    has_output_params = LDAPAddMember.has_output_params + host_output_params
    allow_same = True

api.register(host_add_managedby)


class host_remove_managedby(LDAPRemoveMember):
    """
    Remove hosts that can manage this host.
    """
    member_attributes = ['managedby']
    has_output_params = LDAPRemoveMember.has_output_params + host_output_params

api.register(host_remove_managedby)