summaryrefslogtreecommitdiffstats
path: root/src/providers/ad/ad_common.c
blob: a4703ee723b90efc1722b493332cd4b7b682d0f1 (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
/*
    SSSD

    Authors:
        Stephen Gallagher <sgallagh@redhat.com>

    Copyright (C) 2012 Red Hat

    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/>.
*/
#include <ctype.h>

#include "providers/ad/ad_common.h"
#include "providers/ad/ad_opts.h"

errno_t
ad_get_common_options(TALLOC_CTX *mem_ctx,
                      struct confdb_ctx *cdb,
                      const char *conf_path,
                      struct sss_domain_info *dom,
                      struct ad_options **_opts)
{
    errno_t ret;
    int gret;
    size_t i;
    struct ad_options *opts = NULL;
    char *domain;
    char *server;
    char *realm;
    char *ad_hostname;
    char hostname[HOST_NAME_MAX + 1];

    opts = talloc_zero(mem_ctx, struct ad_options);
    if (!opts) return ENOMEM;

    ret = dp_get_options(opts, cdb, conf_path,
                         ad_basic_opts,
                         AD_OPTS_BASIC,
                         &opts->basic);
    if (ret != EOK) {
        goto done;
    }

    /* If the AD domain name wasn't explicitly set, assume that it
     * matches the SSSD domain name
     */
    domain = dp_opt_get_string(opts->basic, AD_DOMAIN);
    if (!domain) {
        ret = dp_opt_set_string(opts->basic, AD_DOMAIN, dom->name);
        if (ret != EOK) {
            goto done;
        }
        domain = dom->name;
    }

    /* Did we get an explicit server name, or are we discovering it? */
    server = dp_opt_get_string(opts->basic, AD_SERVER);
    if (!server) {
        DEBUG(SSSDBG_CONF_SETTINGS,
              ("No AD server set, will use service discovery!\n"));
    }

    /* Set the machine's hostname to the local host name if it
     * wasn't explicitly specified.
     */
    ad_hostname = dp_opt_get_string(opts->basic, AD_HOSTNAME);
    if (ad_hostname == NULL) {
        gret = gethostname(hostname, HOST_NAME_MAX);
        if (gret != 0) {
            ret = errno;
            DEBUG(SSSDBG_FATAL_FAILURE,
                  ("gethostname failed [%s].\n",
                   strerror(ret)));
            goto done;
        }
        hostname[HOST_NAME_MAX] = '\0';
        DEBUG(SSSDBG_CONF_SETTINGS,
              ("Setting ad_hostname to [%s].\n", hostname));
        ret = dp_opt_set_string(opts->basic, AD_HOSTNAME, hostname);
        if (ret != EOK) {
            DEBUG(SSSDBG_FATAL_FAILURE,
                  ("Setting ad_hostname failed [%s].\n",
                   strerror(ret)));
            goto done;
        }
    }


    /* Always use the upper-case AD domain for the kerberos realm */
    realm = talloc_strdup(opts, domain);
    if (!realm) {
        ret = ENOMEM;
        goto done;
    }

    for (i = 0; realm[i]; i++) {
        realm[i] = toupper(realm[i]);
    }

    ret = dp_opt_set_string(opts->basic, AD_KRB5_REALM, realm);
    if (ret != EOK) {
        goto done;
    }

    /* Active Directory is always case-insensitive */
    dom->case_sensitive = false;

    /* Set this in the confdb so that the responders pick it
     * up when they start up.
     */
    ret = confdb_set_bool(cdb, conf_path, "case_sensitive",
                          dom->case_sensitive);
    if (ret != EOK) {
        DEBUG(SSSDBG_CRIT_FAILURE,
              ("Could not set domain case-sensitive: [%s]\n",
               strerror(ret)));
        goto done;
    }

    DEBUG(SSSDBG_CONF_SETTINGS,
          ("Setting domain case-insensitive\n"));

    ret = EOK;
    *_opts = opts;

done:
    if (ret != EOK) {
        talloc_zfree(opts);
    }
    return ret;
}

static void
ad_resolve_callback(void *private_data, struct fo_server *server);

static errno_t
ad_servers_init(TALLOC_CTX *mem_ctx,
                struct be_ctx *bectx,
                const char *servers,
                struct ad_options *options,
                bool primary)
{
    size_t i;
    errno_t ret;
    char **list;
    char *ad_domain;
    TALLOC_CTX *tmp_ctx;

    tmp_ctx = talloc_new(NULL);
    if (!tmp_ctx) return ENOMEM;

    /* Split the server list */
    ret = split_on_separator(tmp_ctx, servers, ',', true, &list, NULL);
    if (ret != EOK) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to parse server list!\n"));
        goto done;
    }

    ad_domain = dp_opt_get_string(options->basic, AD_DOMAIN);

    /* Add each of these servers to the failover service */
    for (i = 0; list[i]; i++) {
        if (be_fo_is_srv_identifier(list[i])) {
            ret = be_fo_add_srv_server(bectx, AD_SERVICE_NAME, "ldap",
                                       ad_domain, BE_FO_PROTO_TCP,
                                       false, NULL);
            if (ret != EOK) {
                DEBUG(SSSDBG_FATAL_FAILURE,
                      ("Failed to add service discovery to failover: [%s]",
                       strerror(ret)));
                goto done;
            }

            DEBUG(SSSDBG_CONF_SETTINGS, ("Added service discovery for AD\n"));
            continue;
        }

        ret = be_fo_add_server(bectx, AD_SERVICE_NAME, list[i], 0, NULL, primary);
        if (ret && ret != EEXIST) {
            DEBUG(SSSDBG_FATAL_FAILURE, ("Failed to add server\n"));
            goto done;
        }

        DEBUG(SSSDBG_CONF_SETTINGS, ("Added failover server %s\n", list[i]));
    }
done:
    talloc_free(tmp_ctx);
    return ret;
}

errno_t
ad_failover_init(TALLOC_CTX *mem_ctx, struct be_ctx *bectx,
                 const char *primary_servers,
                 const char *backup_servers,
                 struct ad_options *options,
                 struct ad_service **_service)
{
    errno_t ret;
    TALLOC_CTX *tmp_ctx;
    struct ad_service *service;
    char *realm;

    tmp_ctx = talloc_new(mem_ctx);
    if (!tmp_ctx) return ENOMEM;

    service = talloc_zero(tmp_ctx, struct ad_service);
    if (!service) {
        ret = ENOMEM;
        goto done;
    }

    service->sdap = talloc_zero(service, struct sdap_service);
    if (!service->sdap) {
        ret = ENOMEM;
        goto done;
    }

    service->krb5_service = talloc_zero(service, struct krb5_service);
    if (!service->krb5_service) {
        ret = ENOMEM;
        goto done;
    }

    ret = be_fo_add_service(bectx, AD_SERVICE_NAME);
    if (ret != EOK) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to create failover service!\n"));
        goto done;
    }

    service->sdap->name = talloc_strdup(service, AD_SERVICE_NAME);
    if (!service->sdap->name) {
        ret = ENOMEM;
        goto done;
    }

    service->krb5_service->name = talloc_strdup(service, AD_SERVICE_NAME);
    if (!service->krb5_service->name) {
        ret = ENOMEM;
        goto done;
    }
    service->sdap->kinit_service_name = service->krb5_service->name;

    realm = dp_opt_get_string(options->basic, AD_KRB5_REALM);
    if (!realm) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("No Kerberos realm set\n"));
        ret = EINVAL;
        goto done;
    }
    service->krb5_service->realm =
        talloc_strdup(service->krb5_service, realm);
    if (!service->krb5_service->realm) {
        ret = ENOMEM;
        goto done;
    }

    if (!primary_servers) {
        if (backup_servers) {
            DEBUG(SSSDBG_TRACE_FUNC,
                  ("No primary servers defined but backup are present, "
                   "setting backup servers as primary\n"));
            primary_servers = backup_servers;
            backup_servers = NULL;
        } else {
            DEBUG(SSSDBG_TRACE_FUNC,
                  ("No primary or backup servers defined but backup are present, "
                   "setting backup servers as primary\n"));
            primary_servers = BE_SRV_IDENTIFIER;
        }
    }

    ret = ad_servers_init(mem_ctx, bectx, primary_servers, options, true);
    if (ret != EOK) {
        goto done;
    }

    if (backup_servers) {
        ret = ad_servers_init(mem_ctx, bectx, backup_servers, options, false);
        if (ret != EOK) {
            goto done;
        }
    }

    ret = be_fo_service_add_callback(mem_ctx, bectx, AD_SERVICE_NAME,
                                     ad_resolve_callback, service);
    if (ret != EOK) {
        DEBUG(SSSDBG_FATAL_FAILURE,
              ("Failed to add failover callback! [%s]\n", strerror(ret)));
        goto done;
    }

    *_service = talloc_steal(mem_ctx, service);

    ret = EOK;

done:
    talloc_free(tmp_ctx);
    return ret;
}

static void
ad_resolve_callback(void *private_data, struct fo_server *server)
{
    errno_t ret;
    TALLOC_CTX *tmp_ctx;
    struct ad_service *service;
    struct resolv_hostent *srvaddr;
    struct sockaddr_storage *sockaddr;
    char *address;
    const char *safe_address;
    char *new_uri;
    const char *srv_name;

    tmp_ctx = talloc_new(NULL);
    if (!tmp_ctx) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("Out of memory\n"));
        return;
    }

    service = talloc_get_type(private_data, struct ad_service);
    if (!service) {
        ret = EINVAL;
        goto done;
    }

    srvaddr = fo_get_server_hostent(server);
    if (!srvaddr) {
        DEBUG(SSSDBG_CRIT_FAILURE,
              ("No hostent available for server (%s)\n",
               fo_get_server_str_name(server)));
        ret = EINVAL;
        goto done;
    }

    sockaddr = resolv_get_sockaddr_address(tmp_ctx, srvaddr, LDAP_PORT);
    if (sockaddr == NULL) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("resolv_get_sockaddr_address failed.\n"));
        ret = EIO;
        goto done;
    }

    address = resolv_get_string_address(tmp_ctx, srvaddr);
    if (address == NULL) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("resolv_get_string_address failed.\n"));
        ret = EIO;
        goto done;
    }

    srv_name = fo_get_server_name(server);
    if (srv_name == NULL) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("Could not get server host name\n"));
        ret = EINVAL;
        goto done;
    }

    new_uri = talloc_asprintf(service, "ldap://%s", srv_name);
    if (!new_uri) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to copy URI\n"));
        ret = ENOMEM;
        goto done;
    }
    DEBUG(SSSDBG_CONF_SETTINGS, ("Constructed uri '%s'\n", new_uri));

    /* free old one and replace with new one */
    talloc_zfree(service->sdap->uri);
    service->sdap->uri = new_uri;
    talloc_zfree(service->sdap->sockaddr);
    service->sdap->sockaddr = talloc_steal(service, sockaddr);

    safe_address = sss_escape_ip_address(tmp_ctx,
                                         srvaddr->family,
                                         address);
    if (safe_address == NULL) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("sss_escape_ip_address failed.\n"));
        ret = ENOMEM;
        goto done;
    }

    ret = write_krb5info_file(service->krb5_service->realm, safe_address,
                              SSS_KRB5KDC_FO_SRV);
    if (ret != EOK) {
        DEBUG(SSSDBG_MINOR_FAILURE,
              ("write_krb5info_file failed, authentication might fail.\n"));
    }

    ret = EOK;
done:
    if (ret != EOK) {
        DEBUG(SSSDBG_CRIT_FAILURE,
              ("Error: [%s]\n", strerror(ret)));
    }
    talloc_free(tmp_ctx);
    return;
}

errno_t
ad_set_search_bases(struct sdap_options *id_opts);

errno_t
ad_get_id_options(struct ad_options *ad_opts,
                   struct confdb_ctx *cdb,
                   const char *conf_path,
                   struct sdap_options **_opts)
{
    errno_t ret;
    TALLOC_CTX *tmp_ctx;
    struct sdap_options *id_opts;
    char *krb5_realm;
    char *sasl_primary;
    char *desired_primary;
    char *sasl_realm;
    char *desired_realm;
    char *keytab_path;
    bool primary_requested = true;
    bool realm_requested = true;

    tmp_ctx = talloc_new(NULL);
    if (!tmp_ctx) return ENOMEM;

    id_opts = talloc_zero(tmp_ctx, struct sdap_options);
    if (!id_opts) {
        ret = ENOMEM;
        goto done;
    }

    ret = dp_get_options(id_opts, cdb, conf_path,
                         ad_def_ldap_opts,
                         SDAP_OPTS_BASIC,
                         &id_opts->basic);
    if (ret != EOK) {
        goto done;
    }

    /* Set up search bases if they were assigned explicitly */
    ret = ad_set_search_bases(id_opts);
    if (ret != EOK) goto done;

    /* We only support Kerberos password policy with AD, so
     * force that on.
     */
    ret = dp_opt_set_string(id_opts->basic,
                            SDAP_PWD_POLICY,
                            PWD_POL_OPT_MIT);
    if (ret != EOK) {
        DEBUG(SSSDBG_FATAL_FAILURE, ("Could not set password policy\n"));
        goto done;
    }

    /* Set the Kerberos Realm for GSSAPI */
    krb5_realm = dp_opt_get_string(ad_opts->basic, AD_KRB5_REALM);
    if (!krb5_realm) {
        /* Should be impossible, this is set in ad_get_common_options() */
        DEBUG(SSSDBG_FATAL_FAILURE, ("No Kerberos realm\n"));
        ret = EINVAL;
        goto done;
    }

    ret = dp_opt_set_string(id_opts->basic, SDAP_KRB5_REALM, krb5_realm);
    if (ret != EOK) goto done;
    DEBUG(SSSDBG_CONF_SETTINGS,
          ("Option %s set to %s\n",
           id_opts->basic[SDAP_KRB5_REALM].opt_name,
           krb5_realm));

    /* Configuration of SASL auth ID and realm */
    desired_primary = dp_opt_get_string(id_opts->basic, SDAP_SASL_AUTHID);
    if (!desired_primary) {
        primary_requested = false;
        desired_primary = dp_opt_get_string(ad_opts->basic, AD_HOSTNAME);
    }

    desired_realm = dp_opt_get_string(id_opts->basic, SDAP_SASL_REALM);
    if (!desired_realm) {
        realm_requested = false;
        desired_realm = dp_opt_get_string(ad_opts->basic, AD_KRB5_REALM);
    }

    keytab_path = dp_opt_get_string(ad_opts->basic, AD_KEYTAB);
    if (keytab_path) {
        ret = dp_opt_set_string(id_opts->basic, SDAP_KRB5_KEYTAB,
                                keytab_path);
        if (ret != EOK) goto done;
        DEBUG(SSSDBG_CONF_SETTINGS,
              ("Option %s set to %s\n",
               id_opts->basic[SDAP_KRB5_KEYTAB].opt_name,
               keytab_path));
    }

    ret = select_principal_from_keytab(tmp_ctx,
                                       desired_primary, desired_realm,
                                       keytab_path, NULL,
                                       &sasl_primary, &sasl_realm);
    if (ret != EOK) goto done;

    if ((primary_requested && strcmp(desired_primary, sasl_primary) != 0) ||
        (realm_requested && strcmp(desired_realm, sasl_realm) != 0)) {
        DEBUG(SSSDBG_FATAL_FAILURE,
              ("Configured SASL auth ID/realm not found in keytab.\n"));
        ret = ENOENT;
        goto done;
    }

    ret = dp_opt_set_string(id_opts->basic, SDAP_SASL_AUTHID, sasl_primary);
    if (ret != EOK) goto done;
    DEBUG(SSSDBG_CONF_SETTINGS,
          ("Option %s set to %s\n",
           id_opts->basic[SDAP_SASL_AUTHID].opt_name,
           sasl_primary));

    ret = dp_opt_set_string(id_opts->basic, SDAP_SASL_REALM, sasl_realm);
    if (ret != EOK) goto done;
    DEBUG(SSSDBG_CONF_SETTINGS,
          ("Option %s set to %s\n",
           id_opts->basic[SDAP_SASL_REALM].opt_name,
           sasl_realm));

    /* fix schema to AD  */
    id_opts->schema_type = SDAP_SCHEMA_AD;

    /* Get sdap option maps */

    /* General Attribute Map */
    ret = sdap_get_map(id_opts,
                       cdb, conf_path,
                       ad_2008r2_attr_map,
                       SDAP_AT_GENERAL,
                       &id_opts->gen_map);
    if (ret != EOK) {
        goto done;
    }

    /* User map */
    ret = sdap_get_map(id_opts,
                       cdb, conf_path,
                       ad_2008r2_user_map,
                       SDAP_OPTS_USER,
                       &id_opts->user_map);
    if (ret != EOK) {
        goto done;
    }

    /* Group map */
    ret = sdap_get_map(id_opts,
                       cdb, conf_path,
                       ad_2008r2_group_map,
                       SDAP_OPTS_GROUP,
                       &id_opts->group_map);
    if (ret != EOK) {
        goto done;
    }

    /* Netgroup map */
    ret = sdap_get_map(id_opts,
                       cdb, conf_path,
                       ad_netgroup_map,
                       SDAP_OPTS_NETGROUP,
                       &id_opts->netgroup_map);
    if (ret != EOK) {
        goto done;
    }

    /* Services map */
    ret = sdap_get_map(id_opts,
                       cdb, conf_path,
                       ad_service_map,
                       SDAP_OPTS_SERVICES,
                       &id_opts->service_map);
    if (ret != EOK) {
        goto done;
    }

    ad_opts->id = talloc_steal(ad_opts, id_opts);
    *_opts = id_opts;
    ret = EOK;
done:
    talloc_free(tmp_ctx);
    return ret;
}

errno_t
ad_set_search_bases(struct sdap_options *id_opts)
{
    errno_t ret;
    char *default_search_base;
    size_t o;
    const int search_base_options[] = { SDAP_USER_SEARCH_BASE,
                                        SDAP_GROUP_SEARCH_BASE,
                                        SDAP_NETGROUP_SEARCH_BASE,
                                        SDAP_SERVICE_SEARCH_BASE,
                                        -1 };

    /* AD servers provide defaultNamingContext, so we will
     * rely on that to specify the search base unless it has
     * been specifically overridden.
     */

    default_search_base =
            dp_opt_get_string(id_opts->basic, SDAP_SEARCH_BASE);

    if (default_search_base) {
        /* set search bases if they are not */
        for (o = 0; search_base_options[o] != -1; o++) {
            if (NULL == dp_opt_get_string(id_opts->basic,
                                          search_base_options[o])) {
                ret = dp_opt_set_string(id_opts->basic,
                                        search_base_options[o],
                                        default_search_base);
                if (ret != EOK) {
                    goto done;
                }
                DEBUG(SSSDBG_CONF_SETTINGS,
                      ("Option %s set to %s\n",
                       id_opts->basic[search_base_options[o]].opt_name,
                       dp_opt_get_string(id_opts->basic,
                                         search_base_options[o])));
            }
        }
    } else {
        DEBUG(SSSDBG_CONF_SETTINGS,
              ("Search base not set. SSSd will attempt to discover it later, "
               "when connecting to the LDAP server.\n"));
    }

    /* Default search */
    ret = sdap_parse_search_base(id_opts, id_opts->basic,
                                 SDAP_SEARCH_BASE,
                                 &id_opts->search_bases);
    if (ret != EOK && ret != ENOENT) goto done;

    /* User search */
    ret = sdap_parse_search_base(id_opts, id_opts->basic,
                                 SDAP_USER_SEARCH_BASE,
                                 &id_opts->user_search_bases);
    if (ret != EOK && ret != ENOENT) goto done;

    /* Group search base */
    ret = sdap_parse_search_base(id_opts, id_opts->basic,
                                 SDAP_GROUP_SEARCH_BASE,
                                 &id_opts->group_search_bases);
    if (ret != EOK && ret != ENOENT) goto done;

    /* Netgroup search */
    ret = sdap_parse_search_base(id_opts, id_opts->basic,
                                 SDAP_NETGROUP_SEARCH_BASE,
                                 &id_opts->netgroup_search_bases);
    if (ret != EOK && ret != ENOENT) goto done;

    /* Service search */
    ret = sdap_parse_search_base(id_opts, id_opts->basic,
                                 SDAP_SERVICE_SEARCH_BASE,
                                 &id_opts->service_search_bases);
    if (ret != EOK && ret != ENOENT) goto done;

    ret = EOK;
done:
    return ret;
}

errno_t
ad_get_auth_options(TALLOC_CTX *mem_ctx,
                    struct ad_options *ad_opts,
                    struct be_ctx *bectx,
                    struct dp_option **_opts)
{
    errno_t ret;
    struct dp_option *krb5_options;
    const char *ad_servers;
    const char *krb5_realm;

    TALLOC_CTX *tmp_ctx = talloc_new(NULL);
    if (!tmp_ctx) return ENOMEM;

    /* Get krb5 options */
    ret = dp_get_options(tmp_ctx, bectx->cdb, bectx->conf_path,
                         ad_def_krb5_opts, KRB5_OPTS,
                         &krb5_options);
    if (ret != EOK) {
        DEBUG(SSSDBG_CRIT_FAILURE,
              ("Could not read Kerberos options from the configuration\n"));
        goto done;
    }

    ad_servers = dp_opt_get_string(ad_opts->basic, AD_SERVER);

    /* Force the krb5_servers to match the ad_servers */
    ret = dp_opt_set_string(krb5_options, KRB5_KDC, ad_servers);
    if (ret != EOK) goto done;
    DEBUG(SSSDBG_CONF_SETTINGS,
          ("Option %s set to %s\n",
           krb5_options[KRB5_KDC].opt_name,
           ad_servers));

    /* Set krb5 realm */
    /* Set the Kerberos Realm for GSSAPI */
    krb5_realm = dp_opt_get_string(ad_opts->basic, AD_KRB5_REALM);
    if (!krb5_realm) {
        /* Should be impossible, this is set in ad_get_common_options() */
        DEBUG(SSSDBG_FATAL_FAILURE, ("No Kerberos realm\n"));
        ret = EINVAL;
        goto done;
    }

    /* Force the kerberos realm to match the AD_KRB5_REALM (which may have
     * been upper-cased in ad_common_options()
     */
    ret = dp_opt_set_string(krb5_options, KRB5_REALM, krb5_realm);
    if (ret != EOK) goto done;
    DEBUG(SSSDBG_CONF_SETTINGS,
          ("Option %s set to %s\n",
           krb5_options[KRB5_REALM].opt_name,
           krb5_realm));

    *_opts = talloc_steal(mem_ctx, krb5_options);

    ret = EOK;

done:
    talloc_free(tmp_ctx);
    return ret;
}