summaryrefslogtreecommitdiffstats
path: root/src/providers/ldap/ldap_common.c
blob: 856c57e4310a270bcbe6342e8671462a710f1c8f (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
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
/*
    SSSD

    LDAP Provider Common Functions

    Authors:
        Simo Sorce <ssorce@redhat.com>

    Copyright (C) 2008-2010 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 "providers/ldap/ldap_common.h"
#include "providers/fail_over.h"
#include "providers/ldap/sdap_async_private.h"
#include "providers/krb5/krb5_common.h"
#include "db/sysdb_sudo.h"
#include "db/sysdb_services.h"
#include "db/sysdb_autofs.h"

#include "util/sss_krb5.h"
#include "util/crypto/sss_crypto.h"

#include "providers/ldap/ldap_opts.h"
#include "providers/ldap/sdap_idmap.h"

/* a fd the child process would log into */
int ldap_child_debug_fd = -1;


int ldap_get_options(TALLOC_CTX *memctx,
                     struct confdb_ctx *cdb,
                     const char *conf_path,
                     struct sdap_options **_opts)
{
    struct sdap_attr_map *default_attr_map;
    struct sdap_attr_map *default_user_map;
    struct sdap_attr_map *default_group_map;
    struct sdap_attr_map *default_netgroup_map;
    struct sdap_attr_map *default_service_map;
    struct sdap_options *opts;
    char *schema;
    const char *search_base;
    const char *pwd_policy;
    int ret;
    int account_cache_expiration;
    int offline_credentials_expiration;
    const char *ldap_deref;
    int ldap_deref_val;
    int o;
    const char *authtok_type;
    struct dp_opt_blob authtok_blob;
    char *cleartext;
    const int search_base_options[] = { SDAP_USER_SEARCH_BASE,
                                        SDAP_GROUP_SEARCH_BASE,
                                        SDAP_NETGROUP_SEARCH_BASE,
                                        SDAP_SERVICE_SEARCH_BASE,
                                        -1 };

    opts = talloc_zero(memctx, struct sdap_options);
    if (!opts) return ENOMEM;

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

    /* Handle search bases */
    search_base = dp_opt_get_string(opts->basic, SDAP_SEARCH_BASE);
    if (search_base != NULL) {
        /* set user/group/netgroup search bases if they are not */
        for (o = 0; search_base_options[o] != -1; o++) {
            if (NULL == dp_opt_get_string(opts->basic, search_base_options[o])) {
                ret = dp_opt_set_string(opts->basic, search_base_options[o],
                                        search_base);
                if (ret != EOK) {
                    goto done;
                }
                DEBUG(6, ("Option %s set to %s\n",
                          opts->basic[search_base_options[o]].opt_name,
                          dp_opt_get_string(opts->basic,
                                            search_base_options[o])));
            }
        }
    } else {
        DEBUG(5, ("Search base not set, trying to discover it later when "
                  "connecting to the LDAP server.\n"));
    }

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

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

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

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

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

    pwd_policy = dp_opt_get_string(opts->basic, SDAP_PWD_POLICY);
    if (pwd_policy == NULL) {
        DEBUG(1, ("Missing password policy, this may not happen.\n"));
        ret = EINVAL;
        goto done;
    }
    if (strcasecmp(pwd_policy, PWD_POL_OPT_NONE) != 0 &&
        strcasecmp(pwd_policy, PWD_POL_OPT_SHADOW) != 0 &&
        strcasecmp(pwd_policy, PWD_POL_OPT_MIT) != 0) {
        DEBUG(1, ("Unsupported password policy [%s].\n", pwd_policy));
        ret = EINVAL;
        goto done;
    }

    /* account_cache_expiration must be >= than offline_credentials_expiration */
    ret = confdb_get_int(cdb, CONFDB_PAM_CONF_ENTRY,
                         CONFDB_PAM_CRED_TIMEOUT, 0,
                         &offline_credentials_expiration);
    if (ret != EOK) {
        DEBUG(1, ("Cannot get value of %s from confdb \n",
                  CONFDB_PAM_CRED_TIMEOUT));
        goto done;
    }

    account_cache_expiration = dp_opt_get_int(opts->basic,
                                              SDAP_ACCOUNT_CACHE_EXPIRATION);

    /* account cache_expiration must not be smaller than
     * offline_credentials_expiration to prevent deleting entries that
     * still contain credentials valid for offline login.
     *
     * offline_credentials_expiration == 0 is a special case that says
     * that the cached credentials are valid forever. Therefore, the cached
     * entries must not be purged from cache.
     */
    if (!offline_credentials_expiration && account_cache_expiration) {
        DEBUG(1, ("Conflicting values for options %s (unlimited) "
                  "and %s (%d)\n",
                  opts->basic[SDAP_ACCOUNT_CACHE_EXPIRATION].opt_name,
                  CONFDB_PAM_CRED_TIMEOUT,
                  offline_credentials_expiration));
        ret = EINVAL;
        goto done;
    }
    if (offline_credentials_expiration && account_cache_expiration &&
        offline_credentials_expiration > account_cache_expiration) {
        DEBUG(1, ("Value of %s (now %d) must be larger "
                  "than value of %s (now %d)\n",
                  opts->basic[SDAP_ACCOUNT_CACHE_EXPIRATION].opt_name,
                  account_cache_expiration,
                  CONFDB_PAM_CRED_TIMEOUT,
                  offline_credentials_expiration));
        ret = EINVAL;
        goto done;
    }

    ldap_deref = dp_opt_get_string(opts->basic, SDAP_DEREF);
    if (ldap_deref != NULL) {
        ret = deref_string_to_val(ldap_deref, &ldap_deref_val);
        if (ret != EOK) {
            DEBUG(1, ("Failed to verify ldap_deref option.\n"));
            goto done;
        }
    }

#ifndef HAVE_LDAP_CONNCB
    bool ldap_referrals;

    ldap_referrals = dp_opt_get_bool(opts->basic, SDAP_REFERRALS);
    if (ldap_referrals) {
        DEBUG(1, ("LDAP referrals are not supported, because the LDAP library "
                  "is too old, see sssd-ldap(5) for details.\n"));
        ret = dp_opt_set_bool(opts->basic, SDAP_REFERRALS, false);
    }
#endif

    /* schema type */
    schema = dp_opt_get_string(opts->basic, SDAP_SCHEMA);
    if (strcasecmp(schema, "rfc2307") == 0) {
        opts->schema_type = SDAP_SCHEMA_RFC2307;
        default_attr_map = generic_attr_map;
        default_user_map = rfc2307_user_map;
        default_group_map = rfc2307_group_map;
        default_netgroup_map = netgroup_map;
        default_service_map = service_map;
    } else
    if (strcasecmp(schema, "rfc2307bis") == 0) {
        opts->schema_type = SDAP_SCHEMA_RFC2307BIS;
        default_attr_map = generic_attr_map;
        default_user_map = rfc2307bis_user_map;
        default_group_map = rfc2307bis_group_map;
        default_netgroup_map = netgroup_map;
        default_service_map = service_map;
    } else
    if (strcasecmp(schema, "IPA") == 0) {
        opts->schema_type = SDAP_SCHEMA_IPA_V1;
        default_attr_map = gen_ipa_attr_map;
        default_user_map = rfc2307bis_user_map;
        default_group_map = rfc2307bis_group_map;
        default_netgroup_map = netgroup_map;
        default_service_map = service_map;
    } else
    if (strcasecmp(schema, "AD") == 0) {
        opts->schema_type = SDAP_SCHEMA_AD;
        default_attr_map = gen_ad_attr_map;
        default_user_map = gen_ad2008r2_user_map;
        default_group_map = gen_ad2008r2_group_map;
        default_netgroup_map = netgroup_map;
        default_service_map = service_map;
    } else {
        DEBUG(0, ("Unrecognized schema type: %s\n", schema));
        ret = EINVAL;
        goto done;
    }

    ret = sdap_get_map(opts, cdb, conf_path,
                       default_attr_map,
                       SDAP_AT_GENERAL,
                       &opts->gen_map);
    if (ret != EOK) {
        goto done;
    }

    ret = sdap_get_map(opts, cdb, conf_path,
                       default_user_map,
                       SDAP_OPTS_USER,
                       &opts->user_map);
    if (ret != EOK) {
        goto done;
    }

    ret = sdap_get_map(opts, cdb, conf_path,
                       default_group_map,
                       SDAP_OPTS_GROUP,
                       &opts->group_map);
    if (ret != EOK) {
        goto done;
    }

    ret = sdap_get_map(opts, cdb, conf_path,
                       default_netgroup_map,
                       SDAP_OPTS_NETGROUP,
                       &opts->netgroup_map);
    if (ret != EOK) {
        goto done;
    }

    ret = sdap_get_map(opts, cdb, conf_path,
                       default_service_map,
                       SDAP_OPTS_SERVICES,
                       &opts->service_map);
    if (ret != EOK) {
        goto done;
    }

    /* If there is no KDC, try the deprecated krb5_kdcip option, too */
    /* FIXME - this can be removed in a future version */
    ret = krb5_try_kdcip(cdb, conf_path, opts->basic, SDAP_KRB5_KDC);
    if (ret != EOK) {
        DEBUG(1, ("sss_krb5_try_kdcip failed.\n"));
        goto done;
    }

    authtok_type = dp_opt_get_string(opts->basic, SDAP_DEFAULT_AUTHTOK_TYPE);
    if (authtok_type != NULL &&
        strcasecmp(authtok_type,"obfuscated_password") == 0) {
        DEBUG(9, ("Found obfuscated password, "
                  "trying to convert to cleartext.\n"));

        authtok_blob = dp_opt_get_blob(opts->basic, SDAP_DEFAULT_AUTHTOK);
        if (authtok_blob.data == NULL || authtok_blob.length == 0) {
            DEBUG(1, ("Missing obfuscated password string.\n"));
            return EINVAL;
        }

        ret = sss_password_decrypt(memctx, (char *) authtok_blob.data,
                                   &cleartext);
        if (ret != EOK) {
            DEBUG(1, ("Cannot convert the obfuscated "
                      "password back to cleartext\n"));
            return ret;
        }

        authtok_blob.data = (uint8_t *) cleartext;
        authtok_blob.length = strlen(cleartext);
        ret = dp_opt_set_blob(opts->basic, SDAP_DEFAULT_AUTHTOK, authtok_blob);
        talloc_free(cleartext);
        if (ret != EOK) {
            DEBUG(1, ("dp_opt_set_string failed.\n"));
            return ret;
        }

        ret = dp_opt_set_string(opts->basic, SDAP_DEFAULT_AUTHTOK_TYPE,
                                "password");
        if (ret != EOK) {
            DEBUG(1, ("dp_opt_set_string failed.\n"));
            return ret;
        }
    }

    ret = EOK;
    *_opts = opts;

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

int ldap_get_sudo_options(TALLOC_CTX *memctx,
                          struct confdb_ctx *cdb,
                          const char *conf_path,
                          struct sdap_options *opts,
                          bool *use_host_filter,
                          bool *include_regexp,
                          bool *include_netgroups)
{
    const char *search_base;
    int ret;

    /* search base */
    search_base = dp_opt_get_string(opts->basic, SDAP_SEARCH_BASE);
    if (search_base != NULL) {
        /* set sudo search bases if they are not */
        if (dp_opt_get_string(opts->basic, SDAP_SUDO_SEARCH_BASE) == NULL) {
            ret = dp_opt_set_string(opts->basic, SDAP_SUDO_SEARCH_BASE,
                                    search_base);
            if (ret != EOK) {
                DEBUG(SSSDBG_OP_FAILURE, ("Could not set SUDO search base"
                      "to default value\n"));
                return ret;
            }

            DEBUG(SSSDBG_FUNC_DATA, ("Option %s set to %s\n",
                  opts->basic[SDAP_SUDO_SEARCH_BASE].opt_name,
                  dp_opt_get_string(opts->basic, SDAP_SUDO_SEARCH_BASE)));
        }
    } else {
        DEBUG(SSSDBG_TRACE_FUNC, ("Search base not set, trying to discover it later "
              "connecting to the LDAP server.\n"));
    }

    ret = sdap_parse_search_base(opts, opts->basic,
                                 SDAP_SUDO_SEARCH_BASE,
                                 &opts->sudo_search_bases);
    if (ret != EOK && ret != ENOENT) {
        DEBUG(SSSDBG_OP_FAILURE, ("Could not parse SUDO search base\n"));
        return ret;
    }

    /* attrs map */
    ret = sdap_get_map(opts, cdb, conf_path,
                       native_sudorule_map,
                       SDAP_OPTS_SUDO,
                       &opts->sudorule_map);
    if (ret != EOK) {
        DEBUG(SSSDBG_OP_FAILURE, ("Could not get SUDO attribute map\n"));
        return ret;
    }

    /* host filter */
    *use_host_filter = dp_opt_get_bool(opts->basic, SDAP_SUDO_USE_HOST_FILTER);
    *include_netgroups = dp_opt_get_bool(opts->basic, SDAP_SUDO_INCLUDE_NETGROUPS);
    *include_regexp = dp_opt_get_bool(opts->basic, SDAP_SUDO_INCLUDE_REGEXP);

    return EOK;
}

int ldap_get_autofs_options(TALLOC_CTX *memctx,
                            struct confdb_ctx *cdb,
                            const char *conf_path,
                            struct sdap_options *opts)
{
    const char *search_base;
    struct sdap_attr_map *default_entry_map;
    struct sdap_attr_map *default_mobject_map;
    int ret;

    /* search base */
    search_base = dp_opt_get_string(opts->basic, SDAP_SEARCH_BASE);
    if (search_base != NULL) {
        /* set autofs search bases if they are not */
        if (dp_opt_get_string(opts->basic, SDAP_AUTOFS_SEARCH_BASE) == NULL) {
            ret = dp_opt_set_string(opts->basic, SDAP_AUTOFS_SEARCH_BASE,
                                    search_base);
            if (ret != EOK) {
                DEBUG(SSSDBG_OP_FAILURE, ("Could not set autofs search base"
                      "to default value\n"));
                return ret;
            }

            DEBUG(SSSDBG_FUNC_DATA, ("Option %s set to %s\n",
                  opts->basic[SDAP_AUTOFS_SEARCH_BASE].opt_name,
                  dp_opt_get_string(opts->basic, SDAP_AUTOFS_SEARCH_BASE)));
        }
    } else {
        DEBUG(SSSDBG_TRACE_FUNC, ("Search base not set, trying to discover it later "
              "connecting to the LDAP server.\n"));
    }

    ret = sdap_parse_search_base(opts, opts->basic,
                                 SDAP_AUTOFS_SEARCH_BASE,
                                 &opts->autofs_search_bases);
    if (ret != EOK && ret != ENOENT) {
        DEBUG(SSSDBG_OP_FAILURE, ("Could not parse autofs search base\n"));
        return ret;
    }

    /* attribute maps */
    switch (opts->schema_type) {
        case SDAP_SCHEMA_RFC2307:
            default_mobject_map = rfc2307_autofs_mobject_map;
            default_entry_map = rfc2307_autofs_entry_map;
            break;
        case SDAP_SCHEMA_RFC2307BIS:
        case SDAP_SCHEMA_IPA_V1:
        case SDAP_SCHEMA_AD:
            default_mobject_map = rfc2307bis_autofs_mobject_map;
            default_entry_map = rfc2307bis_autofs_entry_map;
            break;
        default:
            DEBUG(SSSDBG_CRIT_FAILURE, ("Unknown LDAP schema!\n"));
            return EINVAL;
    }

    ret = sdap_get_map(opts, cdb, conf_path,
                       default_mobject_map,
                       SDAP_OPTS_AUTOFS_MAP,
                       &opts->autofs_mobject_map);
    if (ret != EOK) {
        DEBUG(SSSDBG_OP_FAILURE,
              ("Could not get autofs map object attribute map\n"));
        return ret;
    }

    ret = sdap_get_map(opts, cdb, conf_path,
                       default_entry_map,
                       SDAP_OPTS_AUTOFS_ENTRY,
                       &opts->autofs_entry_map);
    if (ret != EOK) {
        DEBUG(SSSDBG_OP_FAILURE,
              ("Could not get autofs entry object attribute map\n"));
        return ret;
    }

    return EOK;
}

errno_t sdap_parse_search_base(TALLOC_CTX *mem_ctx,
                               struct dp_option *opts, int class,
                               struct sdap_search_base ***_search_bases)
{
    const char *class_name;
    char *unparsed_base;
    const char *old_filter = NULL;

    *_search_bases = NULL;

    switch (class) {
    case SDAP_SEARCH_BASE:
        class_name = "DEFAULT";
        break;
    case SDAP_USER_SEARCH_BASE:
        class_name = "USER";
        old_filter = dp_opt_get_string(opts, SDAP_USER_SEARCH_FILTER);
        break;
    case SDAP_GROUP_SEARCH_BASE:
        class_name = "GROUP";
        old_filter = dp_opt_get_string(opts, SDAP_GROUP_SEARCH_FILTER);
        break;
    case SDAP_NETGROUP_SEARCH_BASE:
        class_name = "NETGROUP";
        break;
    case SDAP_SUDO_SEARCH_BASE:
        class_name = "SUDO";
        break;
    case SDAP_SERVICE_SEARCH_BASE:
        class_name = "SERVICE";
        break;
    case SDAP_AUTOFS_SEARCH_BASE:
        class_name = "AUTOFS";
        break;
    default:
        DEBUG(SSSDBG_CONF_SETTINGS,
              ("Unknown search base type: [%d]\n", class));
        class_name = "UNKNOWN";
        /* Non-fatal */
        break;
    }

    unparsed_base = dp_opt_get_string(opts, class);
    if (!unparsed_base || unparsed_base[0] == '\0') return ENOENT;

    return common_parse_search_base(mem_ctx, unparsed_base,
                                    class_name, old_filter,
                                    _search_bases);
}

errno_t common_parse_search_base(TALLOC_CTX *mem_ctx,
                                 const char *unparsed_base,
                                 const char *class_name,
                                 const char *old_filter,
                                 struct sdap_search_base ***_search_bases)
{
    errno_t ret;
    struct sdap_search_base **search_bases;
    TALLOC_CTX *tmp_ctx;
    struct ldb_context *ldb;
    struct ldb_dn *ldn;
    struct ldb_parse_tree *tree;
    char **split_bases;
    char *filter;
    int count;
    int i, c;

    tmp_ctx = talloc_new(NULL);
    if (!tmp_ctx) {
        ret = ENOMEM;
        goto done;
    }

    /* Create a throwaway LDB context for validating the DN */
    ldb = ldb_init(tmp_ctx, NULL);
    if (!ldb) {
        ret = ENOMEM;
        goto done;
    }

    ret = split_on_separator(tmp_ctx, unparsed_base, '?', false, false,
                             &split_bases, &count);
    if (ret != EOK) goto done;

    /* The split must be either exactly one value or a multiple of
     * three in order to be valid.
     * One value: just a base, backwards-compatible with pre-1.7.0 versions
     * Multiple: search_base?scope?filter[?search_base?scope?filter]*
     */
    if (count > 1 && (count % 3)) {
        DEBUG(SSSDBG_CRIT_FAILURE,
              ("Unparseable search base: [%s][%d]\n", unparsed_base, count));
        ret = EINVAL;
        goto done;
    }

    if (count == 1) {
        search_bases = talloc_array(tmp_ctx, struct sdap_search_base *, 2);
        if (!search_bases) {
            ret = ENOMEM;
            goto done;
        }
        search_bases[0] = talloc_zero(search_bases, struct sdap_search_base);
        if (!search_bases[0]) {
            ret = ENOMEM;
            goto done;
        }

        search_bases[0]->basedn = talloc_strdup(search_bases[0],
                                                unparsed_base);
        if (!search_bases[0]->basedn) {
            ret = ENOMEM;
            goto done;
        }

        /* Validate the basedn */
        ldn = ldb_dn_new(tmp_ctx, ldb, unparsed_base);
        if (!ldn) {
            ret = ENOMEM;
            goto done;
        }

        if (!ldb_dn_validate(ldn)) {
            DEBUG(SSSDBG_CRIT_FAILURE,
                  ("Invalid base DN [%s]\n",
                   unparsed_base));
            ret = EINVAL;
            goto done;
        }
        talloc_zfree(ldn);

        search_bases[0]->scope = LDAP_SCOPE_SUBTREE;

        /* Use a search filter specified in the old style if available */
        search_bases[0]->filter = old_filter;

        DEBUG(SSSDBG_CONF_SETTINGS,
              ("Search base added: [%s][%s][%s][%s]\n",
               class_name,
               search_bases[0]->basedn,
               "SUBTREE",
               search_bases[0]->filter ? search_bases[0]->filter : ""));

        search_bases[1] = NULL;
    } else {
        search_bases = talloc_array(tmp_ctx, struct sdap_search_base *,
                                    (count / 3) + 1);
        if (!search_bases) {
            ret = ENOMEM;
            goto done;
        }

        i = 0;
        for (c = 0; c < count; c += 3) {
            search_bases[i] = talloc_zero(search_bases,
                                          struct sdap_search_base);
            if (!search_bases[i]) {
                ret = ENOMEM;
                goto done;
            }

            if (split_bases[c][0] == '\0') {
                DEBUG(SSSDBG_CRIT_FAILURE,
                      ("Zero-length search base: [%s]\n", unparsed_base));
                ret = EINVAL;
                goto done;
            }

            /* Validate the basedn */
            ldn = ldb_dn_new(tmp_ctx, ldb, split_bases[c]);
            if (!ldn) {
                ret = ENOMEM;
                goto done;
            }

            if (!ldb_dn_validate(ldn)) {
                DEBUG(SSSDBG_CRIT_FAILURE,
                      ("Invalid base DN [%s]\n",
                       split_bases[c]));
                ret = EINVAL;
                goto done;
            }
            talloc_zfree(ldn);

            /* Set the search base DN */
            search_bases[i]->basedn = talloc_strdup(search_bases[i],
                                                    split_bases[c]);
            if (!search_bases[i]->basedn) {
                ret = ENOMEM;
                goto done;
            }

            /* Set the search scope for this base DN */
            if ((split_bases[c+1][0] == '\0')
                    || strcasecmp(split_bases[c+1], "sub") == 0
                    || strcasecmp(split_bases[c+1], "subtree") == 0) {
                /* If unspecified, default to subtree */
                search_bases[i]->scope = LDAP_SCOPE_SUBTREE;
            } else if (strcasecmp(split_bases[c+1], "one") == 0
                    || strcasecmp(split_bases[c+1], "onelevel") == 0) {
                search_bases[i]->scope = LDAP_SCOPE_ONELEVEL;
            } else if (strcasecmp(split_bases[c+1], "base") == 0) {
                search_bases[i]->scope = LDAP_SCOPE_BASE;
            } else {
                DEBUG(SSSDBG_CRIT_FAILURE,
                      ("Unknown search scope: [%s]\n", split_bases[c+1]));
                ret = EINVAL;
                goto done;
            }

            /* Get a specialized filter if provided */
            if (split_bases[c+2][0] == '\0') {
                search_bases[i]->filter = NULL;
            } else {
                if (split_bases[c+2][0] != '(') {
                    /* Filters need to be enclosed in parentheses
                     * to be validated properly by ldb_parse_tree()
                     */
                    filter = talloc_asprintf(tmp_ctx, "(%s)",
                                             split_bases[c+2]);
                } else {
                    filter = talloc_strdup(tmp_ctx, split_bases[c+2]);
                }
                if (!filter) {
                    ret = ENOMEM;
                    goto done;
                }

                tree = ldb_parse_tree(tmp_ctx, filter);
                if(!tree) {
                    DEBUG(SSSDBG_CRIT_FAILURE,
                          ("Invalid search filter: [%s]\n", filter));
                    ret = EINVAL;
                    goto done;
                }
                talloc_zfree(tree);

                search_bases[i]->filter = talloc_steal(search_bases[i],
                                                       filter);
            }

            DEBUG(SSSDBG_CONF_SETTINGS,
                  ("Search base added: [%s][%s][%s][%s]\n",
                   class_name,
                   search_bases[i]->basedn,
                   split_bases[c+1][0] ? split_bases[c+1] : "SUBTREE",
                   search_bases[i]->filter ? search_bases[i]->filter : ""));

            i++;
        }
        search_bases[i] = NULL;
    }

    *_search_bases = talloc_steal(mem_ctx, search_bases);
    ret = EOK;

done:
    talloc_free(tmp_ctx);
    return ret;
}

void sdap_handler_done(struct be_req *req, int dp_err,
                       int error, const char *errstr)
{
    return be_req_terminate(req, dp_err, error, errstr);
}

void sdap_mark_offline(struct sdap_id_ctx *ctx)
{
    be_mark_offline(ctx->be);
}

int sdap_id_setup_tasks(struct sdap_id_ctx *ctx)
{
    struct timeval tv;
    int ret = EOK;
    int delay;
    bool has_enumerated;

    /* set up enumeration task */
    if (ctx->be->domain->enumerate) {
        /* If this is the first startup, we need to kick off
         * an enumeration immediately, to close a window where
         * clients requesting get*ent information won't get an
         * immediate reply with no entries
         */
        ret = sysdb_has_enumerated(ctx->be->domain->sysdb, ctx->be->domain,
                                   &has_enumerated);
        if (ret != EOK) {
            return ret;
        }
        if (has_enumerated) {
            /* At least one enumeration has previously run,
             * so clients will get cached data. We will delay
             * starting to enumerate by 10s so we don't slow
             * down the startup process if this is happening
             * during system boot.
             */
            tv = tevent_timeval_current_ofs(10, 0);
        } else {
            /* This is our first startup. Schedule the
             * enumeration to start immediately once we
             * enter the mainloop.
             */
            tv = tevent_timeval_current();
        }

        ret = ldap_id_enumerate_set_timer(ctx, tv);
    } else {
        /* the enumeration task, runs the cleanup process by itself,
         * but if enumeration is not running we need to schedule it */
        delay = dp_opt_get_int(ctx->opts->basic, SDAP_CACHE_PURGE_TIMEOUT);
        if (delay == 0) {
            /* Cleanup has been explicitly disabled, so we won't
             * schedule any cleanup tasks.
             */
            return EOK;
        }

        /* run the first one in a couple of seconds so that we have time to
         * finish initializations first*/
        tv = tevent_timeval_current_ofs(10, 0);
        ret = ldap_id_cleanup_set_timer(ctx, tv);
    }

    return ret;
}

static void sdap_uri_callback(void *private_data, struct fo_server *server)
{
    TALLOC_CTX *tmp_ctx = NULL;
    struct sdap_service *service;
    struct resolv_hostent *srvaddr;
    struct sockaddr_storage *sockaddr;
    const char *tmp;
    const char *srv_name;
    char *new_uri;

    tmp_ctx = talloc_new(NULL);
    if (tmp_ctx == NULL) {
        DEBUG(1, ("talloc_new failed\n"));
        return;
    }

    service = talloc_get_type(private_data, struct sdap_service);
    if (!service) {
        talloc_free(tmp_ctx);
        return;
    }

    tmp = (const char *)fo_get_server_user_data(server);

    srvaddr = fo_get_server_hostent(server);
    if (!srvaddr) {
        DEBUG(1, ("FATAL: No hostent available for server (%s)\n",
                  fo_get_server_str_name(server)));
        talloc_free(tmp_ctx);
        return;
    }

    sockaddr = resolv_get_sockaddr_address(tmp_ctx, srvaddr,
                                           fo_get_server_port(server));
    if (sockaddr == NULL) {
        DEBUG(1, ("resolv_get_sockaddr_address failed.\n"));
        talloc_free(tmp_ctx);
        return;
    }

    if (fo_is_srv_lookup(server)) {
        if (!tmp) {
            DEBUG(1, ("Unknown service, using ldap\n"));
            tmp = SSS_LDAP_SRV_NAME;
        }

        srv_name = fo_get_server_name(server);
        if (srv_name == NULL) {
            DEBUG(1, ("Could not get server host name\n"));
            talloc_free(tmp_ctx);
            return;
        }

        new_uri = talloc_asprintf(service, "%s://%s:%d",
                                  tmp, srv_name,
                                  fo_get_server_port(server));
    } else {
        new_uri = talloc_strdup(service, tmp);
    }

    if (!new_uri) {
        DEBUG(2, ("Failed to copy URI ...\n"));
        talloc_free(tmp_ctx);
        return;
    }

    DEBUG(6, ("Constructed uri '%s'\n", new_uri));

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

static void sdap_finalize(struct tevent_context *ev,
                          struct tevent_signal *se,
                          int signum,
                          int count,
                          void *siginfo,
                          void *private_data)
{
    char *realm = (char *) private_data;
    int ret;

    ret = remove_krb5_info_files(se, realm);
    if (ret != EOK) {
        DEBUG(1, ("remove_krb5_info_files failed.\n"));
    }

    sig_term(signum);
}

errno_t sdap_install_sigterm_handler(TALLOC_CTX *mem_ctx,
                                     struct tevent_context *ev,
                                     const char *realm)
{
    char *sig_realm;
    struct tevent_signal *sige;

    BlockSignals(false, SIGTERM);

    sig_realm = talloc_strdup(mem_ctx, realm);
    if (sig_realm == NULL) {
        DEBUG(1, ("talloc_strdup failed!\n"));
        return ENOMEM;
    }

    sige = tevent_add_signal(ev, mem_ctx, SIGTERM, SA_SIGINFO, sdap_finalize,
                             sig_realm);
    if (sige == NULL) {
        DEBUG(1, ("tevent_add_signal failed.\n"));
        talloc_free(sig_realm);
        return ENOMEM;
    }
    talloc_steal(sige, sig_realm);

    return EOK;
}

void sdap_remove_kdcinfo_files_callback(void *pvt)
{
    int ret;
    TALLOC_CTX *tmp_ctx = NULL;
    struct remove_info_files_ctx *ctx = talloc_get_type(pvt,
                                                  struct remove_info_files_ctx);

    ret = be_fo_run_callbacks_at_next_request(ctx->be_ctx,
                                              ctx->kdc_service_name);
    if (ret != EOK) {
        DEBUG(1, ("be_fo_run_callbacks_at_next_request failed, "
                  "krb5 info files will not be removed, because "
                  "it is unclear if they will be recreated properly.\n"));
        return;
    }

    tmp_ctx = talloc_new(NULL);
    if (tmp_ctx == NULL) {
        DEBUG(1, ("talloc_new failed, cannot remove krb5 info files.\n"));
        return;
    }

    ret = remove_krb5_info_files(tmp_ctx, ctx->realm);
    if (ret != EOK) {
        DEBUG(1, ("remove_krb5_info_files failed.\n"));
    }

    talloc_zfree(tmp_ctx);
}


errno_t sdap_install_offline_callback(TALLOC_CTX *mem_ctx,
                                      struct be_ctx *be_ctx,
                                      const char *realm,
                                      const char *service_name)
{
    int ret;
    struct remove_info_files_ctx *ctx;

    ctx = talloc_zero(mem_ctx, struct remove_info_files_ctx);
    if (ctx == NULL) {
        DEBUG(1, ("talloc_zfree failed.\n"));
        return ENOMEM;
    }

    ctx->be_ctx = be_ctx;
    ctx->realm = talloc_strdup(ctx, realm);
    ctx->kdc_service_name = talloc_strdup(ctx, service_name);
    if (ctx->realm == NULL || ctx->kdc_service_name == NULL) {
        DEBUG(1, ("talloc_strdup failed!\n"));
        ret = ENOMEM;
        goto done;
    }

    ret = be_add_offline_cb(ctx, be_ctx,
                            sdap_remove_kdcinfo_files_callback,
                            ctx, NULL);
    if (ret != EOK) {
        DEBUG(1, ("be_add_offline_cb failed.\n"));
        goto done;
    }

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

errno_t
sdap_set_sasl_options(struct sdap_options *id_opts,
                      char *default_primary,
                      char *default_realm,
                      const char *keytab_path)
{
    errno_t ret;
    TALLOC_CTX *tmp_ctx;
    char *sasl_primary;
    char *desired_primary;
    char *primary_realm;
    char *sasl_realm;
    char *desired_realm;
    bool primary_requested = true;
    bool realm_requested = true;

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

    /* 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 = default_primary;
    }

    if ((primary_realm = strchr(desired_primary, '@'))) {
        *primary_realm = '\0';
        desired_realm = primary_realm+1;
        DEBUG(SSSDBG_TRACE_INTERNAL,
              ("authid contains realm [%s]\n", desired_realm));
    } else {
        desired_realm = dp_opt_get_string(id_opts->basic, SDAP_SASL_REALM);
        if (!desired_realm) {
            realm_requested = false;
            desired_realm = default_realm;
        }
    }

    DEBUG(SSSDBG_CONF_SETTINGS, ("Will look for %s@%s in %s\n",
          desired_primary, desired_realm,
          keytab_path ? keytab_path : "default keytab"));

    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) {
        DEBUG(SSSDBG_MINOR_FAILURE,
               ("Configured SASL auth ID not found in keytab. "
                "Requested %s, found %s\n", desired_primary, sasl_primary));
    }

    if (realm_requested && strcmp(desired_realm, sasl_realm) != 0) {
        DEBUG(SSSDBG_MINOR_FAILURE,
               ("Configured SASL realm not found in keytab. "
                "Requested %s, found %s\n", desired_realm, sasl_realm));
    }

    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,
          dp_opt_get_string(id_opts->basic, SDAP_SASL_AUTHID)));

    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,
          dp_opt_get_string(id_opts->basic, SDAP_SASL_REALM)));

    ret = EOK;
done:
    talloc_free(tmp_ctx);
    return ret;
}

static const char *
sdap_gssapi_get_default_realm(TALLOC_CTX *mem_ctx)
{
    char *krb5_realm = NULL;
    const char *realm = NULL;
    krb5_error_code krberr;
    krb5_context context = NULL;

    krberr = krb5_init_context(&context);
    if (krberr) {
        DEBUG(2, ("Failed to init kerberos context\n"));
        goto done;
    }

    krberr = krb5_get_default_realm(context, &krb5_realm);
    if (krberr) {
        DEBUG(2, ("Failed to get default realm name: %s\n",
                  sss_krb5_get_error_message(context, krberr)));
        goto done;
    }

    realm = talloc_strdup(mem_ctx, krb5_realm);
    krb5_free_default_realm(context, krb5_realm);
    if (!realm) {
        DEBUG(0, ("Out of memory\n"));
        goto done;
    }

    DEBUG(7, ("Will use default realm %s\n", realm));
done:
    if (context) krb5_free_context(context);
    return realm;
}

int sdap_gssapi_init(TALLOC_CTX *mem_ctx,
                     struct dp_option *opts,
                     struct be_ctx *bectx,
                     struct sdap_service *sdap_service,
                     struct krb5_service **krb5_service)
{
    int ret;
    const char *krb5_servers;
    const char *krb5_backup_servers;
    const char *krb5_realm;
    const char *krb5_opt_realm;
    struct krb5_service *service = NULL;
    TALLOC_CTX *tmp_ctx;

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

    krb5_servers = dp_opt_get_string(opts, SDAP_KRB5_KDC);
    krb5_backup_servers = dp_opt_get_string(opts, SDAP_KRB5_BACKUP_KDC);

    krb5_opt_realm = dp_opt_get_string(opts, SDAP_KRB5_REALM);
    if (krb5_opt_realm == NULL) {
        DEBUG(2, ("Missing krb5_realm option, will use libkrb default\n"));
        krb5_realm = sdap_gssapi_get_default_realm(tmp_ctx);
        if (krb5_realm == NULL) {
            DEBUG(0, ("Cannot determine the Kerberos realm, aborting\n"));
            ret = EIO;
            goto done;
        }
    } else {
        krb5_realm = talloc_strdup(tmp_ctx, krb5_opt_realm);
        if (krb5_realm == NULL) {
            ret = ENOMEM;
            goto done;
        }
    }

    ret = krb5_service_init(mem_ctx, bectx, SSS_KRB5KDC_FO_SRV, krb5_servers,
                            krb5_backup_servers, krb5_realm, &service);
    if (ret != EOK) {
        DEBUG(0, ("Failed to init KRB5 failover service!\n"));
        goto done;
    }

    ret = sdap_install_sigterm_handler(mem_ctx, bectx->ev, krb5_realm);
    if (ret != EOK) {
        DEBUG(0, ("Failed to install sigterm handler\n"));
        goto done;
    }

    ret = sdap_install_offline_callback(mem_ctx, bectx,
                                        krb5_realm, SSS_KRB5KDC_FO_SRV);
    if (ret != EOK) {
        DEBUG(0, ("Failed to install sigterm handler\n"));
        goto done;
    }

    sdap_service->kinit_service_name = talloc_strdup(sdap_service,
                                                     service->name);
    if (sdap_service->kinit_service_name == NULL) {
        ret = ENOMEM;
        goto done;
    }

    ret = EOK;
    *krb5_service = service;
done:
    talloc_free(tmp_ctx);
    if (ret != EOK) talloc_free(service);
    return ret;
}

static errno_t _sdap_urls_init(struct be_ctx *ctx,
                               struct sdap_service *service,
                               const char *service_name,
                               const char *dns_service_name,
                               const char *urls,
                               bool primary)
{
    TALLOC_CTX *tmp_ctx;
    char *srv_user_data;
    char **list = NULL;
    LDAPURLDesc *lud;
    errno_t ret = 0;
    int i;

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


    /* split server parm into a list */
    ret = split_on_separator(tmp_ctx, urls, ',', true, true, &list, NULL);
    if (ret != EOK) {
        DEBUG(1, ("Failed to parse server list!\n"));
        goto done;
    }

    /* now for each URI add a new server to the failover service */
    for (i = 0; list[i]; i++) {
        if (be_fo_is_srv_identifier(list[i])) {
            if (!primary) {
                DEBUG(SSSDBG_MINOR_FAILURE,
                      ("Failed to add server [%s] to failover service: "
                       "SRV resolution only allowed for primary servers!\n",
                       list[i]));
                continue;
            }

            if (!dns_service_name) {
                DEBUG(0, ("Missing DNS service name for service [%s].\n",
                          service_name));
                ret = EINVAL;
                goto done;
            }
            srv_user_data = talloc_strdup(service, dns_service_name);
            if (!srv_user_data) {
                ret = ENOMEM;
                goto done;
            }

            ret = be_fo_add_srv_server(ctx, service_name,
                                       dns_service_name, NULL,
                                       BE_FO_PROTO_TCP, false, srv_user_data);
            if (ret) {
                DEBUG(0, ("Failed to add server\n"));
                goto done;
            }

            DEBUG(6, ("Added service lookup\n"));
            continue;
        }

        ret = ldap_url_parse(list[i], &lud);
        if (ret != LDAP_SUCCESS) {
            DEBUG(0, ("Failed to parse ldap URI (%s)!\n", list[i]));
            ret = EINVAL;
            goto done;
        }

        if (lud->lud_host == NULL) {
            DEBUG(2, ("The LDAP URI (%s) did not contain a host name\n",
                      list[i]));
            ldap_free_urldesc(lud);
            continue;
        }

        DEBUG(6, ("Added URI %s\n", list[i]));

        talloc_steal(service, list[i]);

        /* It could be ipv6 address in square brackets. Remove
         * the brackets if needed. */
        ret = remove_ipv6_brackets(lud->lud_host);
        if (ret != EOK) {
            goto done;
        }

        ret = be_fo_add_server(ctx, service->name, lud->lud_host,
                               lud->lud_port, list[i], primary);
        ldap_free_urldesc(lud);
        if (ret) {
            goto done;
        }
    }

done:
    talloc_free(tmp_ctx);
    return ret;
}


static inline errno_t
sdap_primary_urls_init(struct be_ctx *ctx, struct sdap_service *service,
                       const char *service_name, const char *dns_service_name,
                       const char *urls)
{
    return _sdap_urls_init(ctx, service, service_name,
                           dns_service_name, urls, true);
}

static inline errno_t
sdap_backup_urls_init(struct be_ctx *ctx, struct sdap_service *service,
                      const char *service_name, const char *dns_service_name,
                      const char *urls)
{
    return _sdap_urls_init(ctx, service, service_name,
                           dns_service_name, urls, false);
}

static int ldap_user_data_cmp(void *ud1, void *ud2)
{
    return strcasecmp((char*) ud1, (char*) ud2);
}

int sdap_service_init(TALLOC_CTX *memctx, struct be_ctx *ctx,
                      const char *service_name, const char *dns_service_name,
                      const char *urls, const char *backup_urls,
                      struct sdap_service **_service)
{
    TALLOC_CTX *tmp_ctx;
    struct sdap_service *service;
    int ret;

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

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

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

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

    if (!urls) {
        DEBUG(SSSDBG_CONF_SETTINGS,
              ("No primary servers defined, using service discovery\n"));
        urls = BE_SRV_IDENTIFIER;
    }

    ret = sdap_primary_urls_init(ctx, service, service_name, dns_service_name,
                                 urls);
    if (ret != EOK) {
        goto done;
    }

    if (backup_urls) {
        ret = sdap_backup_urls_init(ctx, service, service_name,
                                    dns_service_name, backup_urls);
        if (ret != EOK) {
            goto done;
        }
    }

    ret = be_fo_service_add_callback(memctx, ctx, service->name,
                                     sdap_uri_callback, service);
    if (ret != EOK) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to add failover callback!\n"));
        goto done;
    }

    ret = EOK;

done:
    if (ret == EOK) {
        *_service = talloc_steal(memctx, service);
    }
    talloc_zfree(tmp_ctx);
    return ret;
}

errno_t string_to_shadowpw_days(const char *s, long *d)
{
    long l;
    char *endptr;

    if (s == NULL || *s == '\0') {
        *d = -1;
        return EOK;
    }

    errno = 0;
    l = strtol(s, &endptr, 10);
    if (errno != 0) {
        DEBUG(1, ("strtol failed [%d][%s].\n", errno, strerror(errno)));
        return errno;
    }

    if (*endptr != '\0') {
        DEBUG(1, ("Input string [%s] is invalid.\n", s));
        return EINVAL;
    }

    if (l < -1) {
        DEBUG(1, ("Input string contains not allowed negative value [%d].\n",
                  l));
        return EINVAL;
    }

    *d = l;

    return EOK;
}

errno_t get_sysdb_attr_name(TALLOC_CTX *mem_ctx,
                            struct sdap_attr_map *map,
                            size_t map_size,
                            const char *ldap_name,
                            char **sysdb_name)
{
    size_t i;

    for (i = 0; i < map_size; i++) {
        /* Skip map entries with no name (may depend on
         * schema selected)
         */
        if (!map[i].name) continue;

        /* Check if it is a mapped attribute */
        if(strcasecmp(ldap_name, map[i].name) == 0) break;
    }

    if (i < map_size) {
        /* We found a mapped name, return that */
        *sysdb_name = talloc_strdup(mem_ctx, map[i].sys_name);
    } else {
        /* Not mapped, use the same name */
        *sysdb_name = talloc_strdup(mem_ctx, ldap_name);
    }

    if (!*sysdb_name) {
        return ENOMEM;
    }

    return EOK;
}

errno_t list_missing_attrs(TALLOC_CTX *mem_ctx,
                           struct sdap_attr_map *map,
                           size_t map_size,
                           struct sysdb_attrs *recvd_attrs,
                           char ***missing_attrs)
{
    errno_t ret;
    size_t attr_count = 0;
    size_t i, j, k;
    char **missing = NULL;
    const char **expected_attrs;
    char *sysdb_name;
    TALLOC_CTX *tmp_ctx;

    if (!recvd_attrs || !missing_attrs) {
        return EINVAL;
    }

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

    ret = build_attrs_from_map(tmp_ctx, map, map_size, NULL,
                               &expected_attrs, &attr_count);
    if (ret != EOK) {
        goto done;
    }

    /* Allocate the maximum possible values for missing_attrs, to
     * be on the safe side
     */
    missing = talloc_array(tmp_ctx, char *, attr_count);
    if (!missing) {
        ret = ENOMEM;
        goto done;
    }

    k = 0;
    /* Check for each expected attribute */
    for (i = 0; i < attr_count; i++) {
        ret = get_sysdb_attr_name(tmp_ctx, map, map_size,
                                  expected_attrs[i],
                                  &sysdb_name);
        if (ret != EOK) {
            goto done;
        }

        /* objectClass is a special-case and we need to
         * check for it explicitly.
         */
        if (strcasecmp(sysdb_name, "objectClass") == 0) {
            talloc_free(sysdb_name);
            continue;
        }

        /* GECOS is another special case. Its value can come
         * either from the 'gecos' attribute or the 'cn'
         * attribute. It's best if we just never remove it.
         */
        if (strcasecmp(sysdb_name, SYSDB_GECOS) == 0) {
            talloc_free(sysdb_name);
            continue;
        }

        for (j = 0; j < recvd_attrs->num; j++) {
            /* Check whether this expected attribute appeared in the
             * received attributes and had a non-zero number of
             * values.
             */
            if ((strcasecmp(recvd_attrs->a[j].name, sysdb_name) == 0) &&
                (recvd_attrs->a[j].num_values > 0)) {
                break;
            }
        }

        if (j < recvd_attrs->num) {
            /* Attribute was found, therefore not missing */
            talloc_free(sysdb_name);
        } else {
            /* Attribute could not be found. Add to the missing list */
            missing[k] = talloc_steal(missing, sysdb_name);
            k++;
        }
    }

    if (k == 0) {
        *missing_attrs = NULL;
    } else {
        /* Terminate the list */
        missing[k] = NULL;
        *missing_attrs = talloc_steal(mem_ctx, missing);
    }
    ret = EOK;

done:
    talloc_free(tmp_ctx);
    return ret;
}

bool sdap_is_secure_uri(const char *uri)
{
    /* LDAPS URI's are secure channels */
    if (strncasecmp(uri, LDAP_SSL_URI, strlen(LDAP_SSL_URI)) == 0) {
        return true;
    }
    return false;
}

char *sdap_get_id_specific_filter(TALLOC_CTX *mem_ctx,
                                  const char *base_filter,
                                  const char *extra_filter)
{
    char *filter = NULL;

    if (!extra_filter) {
        return talloc_strdup(mem_ctx, base_filter);
    }

    if (extra_filter[0] == '(') {
        filter = talloc_asprintf(mem_ctx, "(&%s%s)",
                                 base_filter, extra_filter);
    } else {
        filter = talloc_asprintf(mem_ctx, "(&%s(%s))",
                                 base_filter, extra_filter);
    }
    return filter; /* NULL or not */
}

errno_t
sdap_attrs_get_sid_str(TALLOC_CTX *mem_ctx,
                       struct sdap_idmap_ctx *idmap_ctx,
                       struct sysdb_attrs *sysdb_attrs,
                       const char *sid_attr,
                       char **_sid_str)
{
    errno_t ret;
    enum idmap_error_code err;
    struct ldb_message_element *el;
    char *sid_str;

    ret = sysdb_attrs_get_el(sysdb_attrs, sid_attr, &el);
    if (ret != EOK || el->num_values != 1) {
        DEBUG(SSSDBG_MINOR_FAILURE,
              ("No [%s] attribute while id-mapping. [%d][%s]\n",
               sid_attr, el->num_values, strerror(ret)));
        return ENOENT;
    }

    if (el->values[0].length > 2 &&
        el->values[0].data[0] == 'S' &&
        el->values[0].data[1] == '-') {
        sid_str = talloc_strndup(mem_ctx, (char *) el->values[0].data,
                                 el->values[0].length);
        if (sid_str == NULL) {
            DEBUG(SSSDBG_OP_FAILURE, ("talloc_strndup failed.\n"));
            return ENOMEM;
        }
    } else {
        err = sss_idmap_bin_sid_to_sid(idmap_ctx->map,
                                       el->values[0].data,
                                       el->values[0].length,
                                       &sid_str);
        if (err != IDMAP_SUCCESS) {
            DEBUG(SSSDBG_MINOR_FAILURE,
                  ("Could not convert SID: [%s]\n",
                   idmap_error_string(err)));
            return EIO;
        }
    }

    *_sid_str = talloc_steal(mem_ctx, sid_str);

    return EOK;
}

struct sdap_id_conn_ctx *
sdap_id_ctx_conn_add(struct sdap_id_ctx *id_ctx,
                     struct sdap_service *sdap_service)
{
    struct sdap_id_conn_ctx *conn;
    errno_t ret;

    conn = talloc_zero(id_ctx, struct sdap_id_conn_ctx);
    if (conn == NULL) {
        return NULL;
    }
    conn->service = talloc_steal(conn, sdap_service);
    conn->id_ctx = id_ctx;

    /* Create a connection cache */
    ret = sdap_id_conn_cache_create(conn, id_ctx, conn, &conn->conn_cache);
    if (ret != EOK) {
        talloc_free(conn);
        return NULL;
    }
    DLIST_ADD_END(id_ctx->conn, conn, struct sdap_id_conn_ctx *);

    return conn;
}

struct sdap_id_ctx *
sdap_id_ctx_new(TALLOC_CTX *mem_ctx, struct be_ctx *bectx,
                struct sdap_service *sdap_service)
{
    struct sdap_id_ctx *sdap_ctx;

    sdap_ctx = talloc_zero(mem_ctx, struct sdap_id_ctx);
    if (sdap_ctx == NULL) {
        return NULL;
    }
    sdap_ctx->be = bectx;

    /* There should be at least one connection context */
    sdap_ctx->conn = sdap_id_ctx_conn_add(sdap_ctx, sdap_service);
    if (sdap_ctx->conn == NULL) {
        talloc_free(sdap_ctx);
        return NULL;
    }

    return sdap_ctx;
}