summaryrefslogtreecommitdiff
path: root/src/providers/ldap/sdap_async_users.c
blob: e2e7b72d89b8bd4a775957846f41ba99b0887b53 (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
/*
    SSSD

    Async LDAP Helper routines - retrieving users

    Copyright (C) Simo Sorce <ssorce@redhat.com> - 2009
    Copyright (C) 2010, Ralf Haferkamp <rhafer@suse.de>, Novell Inc.
    Copyright (C) Jan Zeleny <jzeleny@redhat.com> - 2011

    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 "util/util.h"
#include "db/sysdb.h"
#include "providers/ldap/sdap_async_private.h"
#include "providers/ldap/ldap_common.h"
#include "providers/ldap/sdap_idmap.h"

/* ==Save-User-Entry====================================================== */

/* FIXME: support storing additional attributes */
int sdap_save_user(TALLOC_CTX *memctx,
                   struct sysdb_ctx *ctx,
                   struct sdap_options *opts,
                   struct sss_domain_info *dom,
                   struct sysdb_attrs *attrs,
                   bool is_initgr,
                   char **_usn_value,
                   time_t now)
{
    struct ldb_message_element *el;
    int ret;
    const char *name = NULL;
    const char *fullname = NULL;
    const char *pwd;
    const char *gecos;
    const char *homedir;
    const char *shell;
    uid_t uid;
    gid_t gid, primary_gid;
    struct sysdb_attrs *user_attrs;
    char *upn = NULL;
    size_t i;
    int cache_timeout;
    char *usn_value = NULL;
    char **missing = NULL;
    TALLOC_CTX *tmpctx = NULL;
    bool use_id_mapping = dp_opt_get_bool(opts->basic, SDAP_ID_MAPPING);
    char *sid_str;
    char *dom_sid_str = NULL;
    char *group_sid_str;

    DEBUG(9, ("Save user\n"));

    tmpctx = talloc_new(NULL);
    if (!tmpctx) {
        ret = ENOMEM;
        goto fail;
    }

    user_attrs = sysdb_new_attrs(tmpctx);
    if (user_attrs == NULL) {
        ret = ENOMEM;
        goto fail;
    }

    ret = sysdb_attrs_primary_name(ctx, attrs,
                                   opts->user_map[SDAP_AT_USER_NAME].name,
                                   &name);
    if (ret != EOK) {
        DEBUG(1, ("Failed to save the user - entry has no name attribute\n"));
        goto fail;
    }

    if (opts->schema_type == SDAP_SCHEMA_AD) {
        ret = sysdb_attrs_get_string(attrs,
                    opts->user_map[SDAP_AT_USER_FULLNAME].sys_name, &fullname);
        if (ret == EOK) {
            ret = sysdb_attrs_add_string(user_attrs, SYSDB_FULLNAME, fullname);
            if (ret != EOK) {
                goto fail;
            }
        } else if (ret != ENOENT) {
            goto fail;
        }
    }

    ret = sysdb_attrs_get_el(attrs,
                             opts->user_map[SDAP_AT_USER_PWD].sys_name, &el);
    if (ret) goto fail;
    if (el->num_values == 0) pwd = NULL;
    else pwd = (const char *)el->values[0].data;

    ret = sysdb_attrs_get_el(attrs,
                             opts->user_map[SDAP_AT_USER_GECOS].sys_name, &el);
    if (ret) goto fail;
    if (el->num_values == 0) gecos = NULL;
    else gecos = (const char *)el->values[0].data;

    if (!gecos) {
        /* Fall back to the user's full name */
        ret = sysdb_attrs_get_el(
                attrs,
                opts->user_map[SDAP_AT_USER_FULLNAME].sys_name, &el);
        if (ret) goto fail;
        if (el->num_values > 0) gecos = (const char *)el->values[0].data;
    }

    ret = sysdb_attrs_get_el(attrs,
                             opts->user_map[SDAP_AT_USER_HOME].sys_name, &el);
    if (ret) goto fail;
    if (el->num_values == 0) homedir = NULL;
    else homedir = (const char *)el->values[0].data;

    ret = sysdb_attrs_get_el(attrs,
                             opts->user_map[SDAP_AT_USER_SHELL].sys_name, &el);
    if (ret) goto fail;
    if (el->num_values == 0) shell = NULL;
    else shell = (const char *)el->values[0].data;

    /* Retrieve or map the UID as appropriate */
    if (use_id_mapping) {
        DEBUG(SSSDBG_TRACE_LIBS,
              ("Mapping user [%s] objectSID to unix ID\n", name));

        ret = sdap_attrs_get_sid_str(
                tmpctx, opts->idmap_ctx, attrs,
                opts->user_map[SDAP_AT_USER_OBJECTSID].sys_name,
                &sid_str);
        if (ret != EOK) goto fail;

        /* Add string representation to the cache for easier
         * debugging
         */
        ret = sysdb_attrs_add_string(user_attrs, SYSDB_SID_STR, sid_str);
        if (ret != EOK) goto fail;

        /* Convert the SID into a UNIX user ID */
        ret = sdap_idmap_sid_to_unix(opts->idmap_ctx, sid_str, &uid);
        if (ret != EOK) goto fail;

        /* Store the UID in the ldap_attrs so it doesn't get
         * treated as a missing attribute from LDAP and removed.
         */
        ret = sysdb_attrs_add_uint32(attrs, SYSDB_UIDNUM, uid);
        if (ret != EOK) goto fail;
    } else {
        ret = sysdb_attrs_get_uint32_t(attrs,
                                       opts->user_map[SDAP_AT_USER_UID].sys_name,
                                       &uid);
        if (ret != EOK) {
            DEBUG(1, ("no uid provided for [%s] in domain [%s].\n",
                      name, dom->name));
            ret = EINVAL;
            goto fail;
        }
    }
    /* check that the uid is valid for this domain */
    if (OUT_OF_ID_RANGE(uid, dom->id_min, dom->id_max)) {
            DEBUG(2, ("User [%s] filtered out! (uid out of range)\n",
                      name));
        ret = EINVAL;
        goto fail;
    }

    if (use_id_mapping) {
        ret = sysdb_attrs_get_uint32_t(
                attrs,
                opts->user_map[SDAP_AT_USER_PRIMARY_GROUP].sys_name,
                &primary_gid);
        if (ret != EOK) {
            DEBUG(SSSDBG_MINOR_FAILURE,
                  ("no primary group ID provided for [%s] in domain [%s].\n",
                   name, dom->name));
            ret = EINVAL;
            goto fail;
        }

        /* The primary group ID is just the RID part of the objectSID
         * of the group. Generate the GID by adding this to the domain
         * SID value.
         */

        /* First, get the domain SID if we didn't do so above */
        if (!dom_sid_str) {
            ret = sdap_idmap_get_dom_sid_from_object(tmpctx, sid_str,
                                                     &dom_sid_str);
            if (ret != EOK) {
                DEBUG(SSSDBG_MINOR_FAILURE,
                      ("Could not parse domain SID from [%s]\n", sid_str));
                goto fail;
            }
        }

        /* Add the RID to the end */
        group_sid_str = talloc_asprintf(tmpctx, "%s-%lu",
                                        dom_sid_str,
                                        (unsigned long)primary_gid);
        if (!group_sid_str) {
            ret = ENOMEM;
            goto fail;
        }

        /* Convert the SID into a UNIX group ID */
        ret = sdap_idmap_sid_to_unix(opts->idmap_ctx, group_sid_str, &gid);
        if (ret != EOK) goto fail;

        /* Store the GID in the ldap_attrs so it doesn't get
         * treated as a missing attribute from LDAP and removed.
         */
        ret = sysdb_attrs_add_uint32(attrs, SYSDB_GIDNUM, gid);
        if (ret != EOK) goto fail;
    } else {
        ret = sysdb_attrs_get_uint32_t(attrs,
                                       opts->user_map[SDAP_AT_USER_GID].sys_name,
                                       &gid);
        if (ret != EOK) {
            DEBUG(1, ("no gid provided for [%s] in domain [%s].\n",
                      name, dom->name));
            ret = EINVAL;
            goto fail;
        }
    }

    /* check that the gid is valid for this domain */
    if (OUT_OF_ID_RANGE(gid, dom->id_min, dom->id_max)) {
            DEBUG(2, ("User [%s] filtered out! (primary gid out of range)\n",
                      name));
        ret = EINVAL;
        goto fail;
    }

    ret = sdap_attrs_add_string(attrs, SYSDB_ORIG_DN,
                                "original DN",
                                name, user_attrs);
    if (ret != EOK) {
        goto fail;
    }

    ret = sysdb_attrs_get_el(attrs, SYSDB_MEMBEROF, &el);
    if (ret) {
        goto fail;
    }
    if (el->num_values == 0) {
        DEBUG(7, ("Original memberOf is not available for [%s].\n",
                    name));
    } else {
        DEBUG(7, ("Adding original memberOf attributes to [%s].\n",
                    name));
        for (i = 0; i < el->num_values; i++) {
            ret = sysdb_attrs_add_string(user_attrs, SYSDB_ORIG_MEMBEROF,
                    (const char *) el->values[i].data);
            if (ret) {
                goto fail;
            }
        }
    }

    ret = sdap_attrs_add_string(attrs,
                            opts->user_map[SDAP_AT_USER_MODSTAMP].sys_name,
                            "original mod-Timestamp",
                            name, user_attrs);
    if (ret != EOK) {
        goto fail;
    }

    ret = sysdb_attrs_get_el(attrs,
                      opts->user_map[SDAP_AT_USER_USN].sys_name, &el);
    if (ret) {
        goto fail;
    }
    if (el->num_values == 0) {
        DEBUG(7, ("Original USN value is not available for [%s].\n",
                  name));
    } else {
        ret = sysdb_attrs_add_string(user_attrs,
                          opts->user_map[SDAP_AT_USER_USN].sys_name,
                          (const char*)el->values[0].data);
        if (ret) {
            goto fail;
        }
        usn_value = talloc_strdup(tmpctx, (const char*)el->values[0].data);
        if (!usn_value) {
            ret = ENOMEM;
            goto fail;
        }
    }

    ret = sysdb_attrs_get_el(attrs,
                             opts->user_map[SDAP_AT_USER_PRINC].sys_name, &el);
    if (ret) {
        goto fail;
    }
    if (el->num_values == 0) {
        DEBUG(7, ("User principal is not available for [%s].\n", name));
    } else {
        upn = talloc_strdup(user_attrs, (const char*) el->values[0].data);
        if (!upn) {
            ret = ENOMEM;
            goto fail;
        }
        if (dp_opt_get_bool(opts->basic, SDAP_FORCE_UPPER_CASE_REALM)) {
            make_realm_upper_case(upn);
        }
        DEBUG(7, ("Adding user principal [%s] to attributes of [%s].\n",
                  upn, name));
        ret = sysdb_attrs_add_string(user_attrs, SYSDB_UPN, upn);
        if (ret) {
            goto fail;
        }
    }

    for (i = SDAP_FIRST_EXTRA_USER_AT; i < SDAP_OPTS_USER; i++) {
        ret = sdap_attrs_add_list(attrs, opts->user_map[i].sys_name,
                                  NULL, name, user_attrs);
        if (ret) {
            goto fail;
        }
    }

    cache_timeout = dom->user_timeout;

    if (is_initgr) {
        ret = sysdb_attrs_add_time_t(user_attrs, SYSDB_INITGR_EXPIRE,
                                     (cache_timeout ?
                                      (time(NULL) + cache_timeout) : 0));
        if (ret) {
            goto fail;
        }
    }

    ret = sdap_save_all_names(name, attrs, !dom->case_sensitive, user_attrs);
    if (ret != EOK) {
        DEBUG(1, ("Failed to save user names\n"));
        goto fail;
    }

    /* Make sure that any attributes we requested from LDAP that we
     * did not receive are also removed from the sysdb
     */
    ret = list_missing_attrs(user_attrs, opts->user_map, SDAP_OPTS_USER,
                             attrs, &missing);
    if (ret != EOK) {
        goto fail;
    }

    DEBUG(6, ("Storing info for user %s\n", name));

    ret = sysdb_store_user(ctx, name, pwd, uid, gid, gecos, homedir, shell,
                           user_attrs, missing, cache_timeout, now);
    if (ret) goto fail;

    if (_usn_value) {
        *_usn_value = talloc_steal(memctx, usn_value);
    }

    talloc_steal(memctx, user_attrs);
    talloc_free(tmpctx);
    return EOK;

fail:
    DEBUG(2, ("Failed to save user [%s]\n",
              name ? name : "Unknown"));
    talloc_free(tmpctx);
    return ret;
}


/* ==Generic-Function-to-save-multiple-users============================= */

int sdap_save_users(TALLOC_CTX *memctx,
                    struct sysdb_ctx *sysdb,
                    struct sss_domain_info *dom,
                    struct sdap_options *opts,
                    struct sysdb_attrs **users,
                    int num_users,
                    char **_usn_value)
{
    TALLOC_CTX *tmpctx;
    char *higher_usn = NULL;
    char *usn_value;
    int ret;
    errno_t sret;
    int i;
    time_t now;
    bool in_transaction = false;

    if (num_users == 0) {
        /* Nothing to do if there are no users */
        return EOK;
    }

    tmpctx = talloc_new(memctx);
    if (!tmpctx) {
        return ENOMEM;
    }

    ret = sysdb_transaction_start(sysdb);
    if (ret) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to start transaction\n"));
        goto done;
    }
    in_transaction = true;

    now = time(NULL);
    for (i = 0; i < num_users; i++) {
        usn_value = NULL;

        ret = sdap_save_user(tmpctx, sysdb, opts, dom,
                             users[i], false,
                             &usn_value, now);

        /* Do not fail completely on errors.
         * Just report the failure to save and go on */
        if (ret) {
            DEBUG(2, ("Failed to store user %d. Ignoring.\n", i));
        } else {
            DEBUG(9, ("User %d processed!\n", i));
        }

        if (usn_value) {
            if (higher_usn) {
                if ((strlen(usn_value) > strlen(higher_usn)) ||
                    (strcmp(usn_value, higher_usn) > 0)) {
                    talloc_zfree(higher_usn);
                    higher_usn = usn_value;
                } else {
                    talloc_zfree(usn_value);
                }
            } else {
                higher_usn = usn_value;
            }
        }
    }

    ret = sysdb_transaction_commit(sysdb);
    if (ret) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to commit transaction!\n"));
        goto done;
    }
    in_transaction = false;

    if (_usn_value) {
        *_usn_value = talloc_steal(memctx, higher_usn);
    }

done:
    if (in_transaction) {
        sret = sysdb_transaction_cancel(sysdb);
        if (sret != EOK) {
            DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to cancel transaction\n"));
        }
    }
    talloc_zfree(tmpctx);
    return ret;
}


/* ==Search-Users-with-filter============================================= */

struct sdap_get_users_state {
    struct tevent_context *ev;
    struct sdap_options *opts;
    struct sdap_handle *sh;
    struct sss_domain_info *dom;
    struct sysdb_ctx *sysdb;
    const char **attrs;
    const char *base_filter;
    char *filter;
    int timeout;
    bool enumeration;

    char *higher_usn;
    struct sysdb_attrs **users;
    size_t count;

    size_t base_iter;
    struct sdap_search_base **search_bases;
};

static errno_t sdap_get_users_next_base(struct tevent_req *req);
static void sdap_get_users_process(struct tevent_req *subreq);

struct tevent_req *sdap_get_users_send(TALLOC_CTX *memctx,
                                       struct tevent_context *ev,
                                       struct sss_domain_info *dom,
                                       struct sysdb_ctx *sysdb,
                                       struct sdap_options *opts,
                                       struct sdap_search_base **search_bases,
                                       struct sdap_handle *sh,
                                       const char **attrs,
                                       const char *filter,
                                       int timeout,
                                       bool enumeration)
{
    errno_t ret;
    struct tevent_req *req;
    struct sdap_get_users_state *state;

    req = tevent_req_create(memctx, &state, struct sdap_get_users_state);
    if (!req) return NULL;

    state->ev = ev;
    state->opts = opts;
    state->dom = dom;
    state->sh = sh;
    state->sysdb = sysdb;
    state->attrs = attrs;
    state->higher_usn = NULL;
    state->users =  NULL;
    state->count = 0;
    state->timeout = timeout;
    state->base_filter = filter;
    state->base_iter = 0;
    state->search_bases = search_bases;
    state->enumeration = enumeration;

    if (!state->search_bases) {
        DEBUG(SSSDBG_CRIT_FAILURE,
              ("User lookup request without a search base\n"));
        ret = EINVAL;
        goto done;
    }

    ret = sdap_get_users_next_base(req);

done:
    if (ret != EOK) {
        tevent_req_error(req, ret);
        tevent_req_post(req, state->ev);
    }

    return req;
}

static errno_t sdap_get_users_next_base(struct tevent_req *req)
{
    struct tevent_req *subreq;
    struct sdap_get_users_state *state;

    state = tevent_req_data(req, struct sdap_get_users_state);

    talloc_zfree(state->filter);
    state->filter = sdap_get_id_specific_filter(state,
                        state->base_filter,
                        state->search_bases[state->base_iter]->filter);
    if (!state->filter) {
        return ENOMEM;
    }

    DEBUG(SSSDBG_TRACE_FUNC,
          ("Searching for users with base [%s]\n",
           state->search_bases[state->base_iter]->basedn));

    subreq = sdap_get_generic_send(
            state, state->ev, state->opts, state->sh,
            state->search_bases[state->base_iter]->basedn,
            state->search_bases[state->base_iter]->scope,
            state->filter, state->attrs,
            state->opts->user_map, SDAP_OPTS_USER,
            state->timeout,
            state->enumeration); /* If we're enumerating, we need paging */
    if (!subreq) {
        return ENOMEM;
    }
    tevent_req_set_callback(subreq, sdap_get_users_process, req);

    return EOK;
}

static void sdap_get_users_process(struct tevent_req *subreq)
{
    struct tevent_req *req = tevent_req_callback_data(subreq,
                                                      struct tevent_req);
    struct sdap_get_users_state *state = tevent_req_data(req,
                                            struct sdap_get_users_state);
    int ret;
    size_t count, i;
    struct sysdb_attrs **users;
    bool next_base = false;

    ret = sdap_get_generic_recv(subreq, state,
                                &count, &users);
    talloc_zfree(subreq);
    if (ret) {
        tevent_req_error(req, ret);
        return;
    }

    DEBUG(6, ("Search for users, returned %d results.\n", count));

    if (state->enumeration || count == 0) {
        /* No users found in this search or enumerating */
        next_base = true;
    }

    /* Add this batch of users to the list */
    if (count > 0) {
        state->users =
                talloc_realloc(state,
                               state->users,
                               struct sysdb_attrs *,
                               state->count + count + 1);
        if (!state->users) {
            tevent_req_error(req, ENOMEM);
            return;
        }

        /* Copy the new users into the list
         * They're already allocated on 'state'
         */
        for (i = 0; i < count; i++) {
            state->users[state->count + i] =
                talloc_steal(state->users, users[i]);
        }

        state->count += count;
        state->users[state->count] = NULL;
    }

    if (next_base) {
        state->base_iter++;
        if (state->search_bases[state->base_iter]) {
            /* There are more search bases to try */
            ret = sdap_get_users_next_base(req);
            if (ret != EOK) {
                tevent_req_error(req, ret);
            }
            return;
        }
    }

    /* No more search bases
     * Return ENOENT if no users were found
     */
    if (state->count == 0) {
        tevent_req_error(req, ENOENT);
        return;
    }

    ret = sdap_save_users(state, state->sysdb,
                          state->dom, state->opts,
                          state->users, state->count,
                          &state->higher_usn);
    if (ret) {
        DEBUG(2, ("Failed to store users.\n"));
        tevent_req_error(req, ret);
        return;
    }

    DEBUG(9, ("Saving %d Users - Done\n", state->count));

    tevent_req_done(req);
}

int sdap_get_users_recv(struct tevent_req *req,
                        TALLOC_CTX *mem_ctx, char **usn_value)
{
    struct sdap_get_users_state *state = tevent_req_data(req,
                                            struct sdap_get_users_state);

    TEVENT_REQ_RETURN_ON_ERROR(req);

    if (usn_value) {
        *usn_value = talloc_steal(mem_ctx, state->higher_usn);
    }

    return EOK;
}