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s4:dsdb/samldb: avoid nested unindexed searches in samldb_member_check()
[Samba.git] / source4 / dsdb / samdb / ldb_modules / samldb.c
blobbe8eb1abfc5d5d239c430dff9d00e6f1db9f0171
1 /*
2 SAM ldb module
3
4 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
5 Copyright (C) Simo Sorce 2004-2008
6 Copyright (C) Matthias Dieter Wallnöfer 2009-2010
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 /*
23 * Name: ldb
24 *
25 * Component: ldb samldb module
26 *
27 * Description: various internal DSDB triggers - most for SAM specific objects
28 *
29 * Author: Simo Sorce
30 */
31
32 #include "includes.h"
33 #include "libcli/ldap/ldap_ndr.h"
34 #include "ldb_module.h"
35 #include "dsdb/samdb/samdb.h"
36 #include "dsdb/samdb/ldb_modules/util.h"
37 #include "dsdb/samdb/ldb_modules/ridalloc.h"
38 #include "libcli/security/security.h"
39 #include "librpc/gen_ndr/ndr_security.h"
40 #include "ldb_wrap.h"
41 #include "param/param.h"
42
43 struct samldb_ctx;
44
45 typedef int (*samldb_step_fn_t)(struct samldb_ctx *);
46
47 struct samldb_step {
48 struct samldb_step *next;
49 samldb_step_fn_t fn;
50 };
51
52 struct samldb_ctx {
53 struct ldb_module *module;
54 struct ldb_request *req;
55
56 /* used for add operations */
57 const char *type;
58
59 /* the resulting message */
60 struct ldb_message *msg;
61
62 /* used in "samldb_find_for_defaultObjectCategory" */
63 struct ldb_dn *dn, *res_dn;
64
65 /* all the async steps necessary to complete the operation */
66 struct samldb_step *steps;
67 struct samldb_step *curstep;
68
69 /* If someone set an ares to forward controls and response back to the caller */
70 struct ldb_reply *ares;
71 };
72
73 static struct samldb_ctx *samldb_ctx_init(struct ldb_module *module,
74 struct ldb_request *req)
75 {
76 struct ldb_context *ldb;
77 struct samldb_ctx *ac;
78
79 ldb = ldb_module_get_ctx(module);
80
81 ac = talloc_zero(req, struct samldb_ctx);
82 if (ac == NULL) {
83 ldb_oom(ldb);
84 return NULL;
85 }
86
87 ac->module = module;
88 ac->req = req;
89
90 return ac;
91 }
92
93 static int samldb_add_step(struct samldb_ctx *ac, samldb_step_fn_t fn)
94 {
95 struct samldb_step *step, *stepper;
96
97 step = talloc_zero(ac, struct samldb_step);
98 if (step == NULL) {
99 return ldb_oom(ldb_module_get_ctx(ac->module));
100 }
101
102 step->fn = fn;
103
104 if (ac->steps == NULL) {
105 ac->steps = step;
106 ac->curstep = step;
107 } else {
108 if (ac->curstep == NULL)
109 return ldb_operr(ldb_module_get_ctx(ac->module));
110 for (stepper = ac->curstep; stepper->next != NULL;
111 stepper = stepper->next);
112 stepper->next = step;
113 }
114
115 return LDB_SUCCESS;
116 }
117
118 static int samldb_first_step(struct samldb_ctx *ac)
119 {
120 if (ac->steps == NULL) {
121 return ldb_operr(ldb_module_get_ctx(ac->module));
122 }
123
124 ac->curstep = ac->steps;
125 return ac->curstep->fn(ac);
126 }
127
128 static int samldb_next_step(struct samldb_ctx *ac)
129 {
130 if (ac->curstep->next) {
131 ac->curstep = ac->curstep->next;
132 return ac->curstep->fn(ac);
133 }
134
135 /* We exit the samldb module here. If someone set an "ares" to forward
136 * controls and response back to the caller, use them. */
137 if (ac->ares) {
138 return ldb_module_done(ac->req, ac->ares->controls,
139 ac->ares->response, LDB_SUCCESS);
140 } else {
141 return ldb_module_done(ac->req, NULL, NULL, LDB_SUCCESS);
142 }
143 }
144
145
146 /* sAMAccountName handling */
147
148 static int samldb_generate_sAMAccountName(struct ldb_context *ldb,
149 struct ldb_message *msg)
150 {
151 char *name;
152
153 /* Format: $000000-000000000000 */
154
155 name = talloc_asprintf(msg, "$%.6X-%.6X%.6X",
156 (unsigned int)generate_random(),
157 (unsigned int)generate_random(),
158 (unsigned int)generate_random());
159 if (name == NULL) {
160 return ldb_oom(ldb);
161 }
162 return ldb_msg_add_steal_string(msg, "sAMAccountName", name);
163 }
164
165 static int samldb_check_sAMAccountName(struct samldb_ctx *ac)
166 {
167 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
168 const char *name;
169 int ret;
170
171 if (ldb_msg_find_element(ac->msg, "sAMAccountName") == NULL) {
172 ret = samldb_generate_sAMAccountName(ldb, ac->msg);
173 if (ret != LDB_SUCCESS) {
174 return ret;
175 }
176 }
177
178 name = ldb_msg_find_attr_as_string(ac->msg, "sAMAccountName", NULL);
179 if (name == NULL) {
180 /* The "sAMAccountName" cannot be nothing */
181 ldb_set_errstring(ldb,
182 "samldb: Empty account names aren't allowed!");
183 return LDB_ERR_CONSTRAINT_VIOLATION;
184 }
185
186 ret = samdb_search_count(ldb, ac, NULL, "(sAMAccountName=%s)",
187 ldb_binary_encode_string(ac, name));
188 if ((ret < 0) || (ret > 1)) {
189 return ldb_operr(ldb);
190 }
191 if (ret == 1) {
192 ldb_asprintf_errstring(ldb,
193 "samldb: Account name (sAMAccountName) '%s' already in use!",
194 name);
195 return LDB_ERR_ENTRY_ALREADY_EXISTS;
196 }
197
198 return samldb_next_step(ac);
199 }
200
201
202 static bool samldb_msg_add_sid(struct ldb_message *msg,
203 const char *name,
204 const struct dom_sid *sid)
205 {
206 struct ldb_val v;
207 enum ndr_err_code ndr_err;
208
209 ndr_err = ndr_push_struct_blob(&v, msg, sid,
210 (ndr_push_flags_fn_t)ndr_push_dom_sid);
211 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
212 return false;
213 }
214 return (ldb_msg_add_value(msg, name, &v, NULL) == 0);
215 }
216
217
218 /* allocate a SID using our RID Set */
219 static int samldb_allocate_sid(struct samldb_ctx *ac)
220 {
221 uint32_t rid;
222 struct dom_sid *sid;
223 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
224 int ret;
225
226 ret = ridalloc_allocate_rid(ac->module, &rid);
227 if (ret != LDB_SUCCESS) {
228 return ret;
229 }
230
231 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
232 if (sid == NULL) {
233 return ldb_module_oom(ac->module);
234 }
235
236 if ( ! samldb_msg_add_sid(ac->msg, "objectSid", sid)) {
237 return ldb_operr(ldb);
238 }
239
240 return samldb_next_step(ac);
241 }
242
243 /*
244 see if a krbtgt_number is available
245 */
246 static bool samldb_krbtgtnumber_available(struct samldb_ctx *ac,
247 uint32_t krbtgt_number)
248 {
249 TALLOC_CTX *tmp_ctx = talloc_new(ac);
250 struct ldb_result *res;
251 const char *no_attrs[] = { NULL };
252 int ret;
253
254 ret = dsdb_module_search(ac->module, tmp_ctx, &res, NULL,
255 LDB_SCOPE_SUBTREE, no_attrs,
256 DSDB_FLAG_NEXT_MODULE,
257 "(msDC-SecondaryKrbTgtNumber=%u)",
258 krbtgt_number);
259 if (ret == LDB_SUCCESS && res->count == 0) {
260 talloc_free(tmp_ctx);
261 return true;
262 }
263 talloc_free(tmp_ctx);
264 return false;
265 }
266
267 /* special handling for add in RODC join */
268 static int samldb_rodc_add(struct samldb_ctx *ac)
269 {
270 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
271 uint32_t krbtgt_number, i_start, i;
272 int ret;
273 char *newpass;
274
275 /* find a unused msDC-SecondaryKrbTgtNumber */
276 i_start = generate_random() & 0xFFFF;
277 if (i_start == 0) {
278 i_start = 1;
279 }
280
281 for (i=i_start; i<=0xFFFF; i++) {
282 if (samldb_krbtgtnumber_available(ac, i)) {
283 krbtgt_number = i;
284 goto found;
285 }
286 }
287 for (i=1; i<i_start; i++) {
288 if (samldb_krbtgtnumber_available(ac, i)) {
289 krbtgt_number = i;
290 goto found;
291 }
292 }
293
294 ldb_asprintf_errstring(ldb,
295 "%08X: Unable to find available msDS-SecondaryKrbTgtNumber",
296 W_ERROR_V(WERR_NO_SYSTEM_RESOURCES));
297 return LDB_ERR_OTHER;
298
299 found:
300 ret = ldb_msg_add_empty(ac->msg, "msDS-SecondaryKrbTgtNumber",
301 LDB_FLAG_INTERNAL_DISABLE_VALIDATION, NULL);
302 if (ret != LDB_SUCCESS) {
303 return ldb_operr(ldb);
304 }
305
306 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
307 "msDS-SecondaryKrbTgtNumber", krbtgt_number);
308 if (ret != LDB_SUCCESS) {
309 return ldb_operr(ldb);
310 }
311
312 ret = ldb_msg_add_fmt(ac->msg, "sAMAccountName", "krbtgt_%u",
313 krbtgt_number);
314 if (ret != LDB_SUCCESS) {
315 return ldb_operr(ldb);
316 }
317
318 newpass = generate_random_password(ac->msg, 128, 255);
319 if (newpass == NULL) {
320 return ldb_operr(ldb);
321 }
322
323 ret = ldb_msg_add_steal_string(ac->msg, "clearTextPassword", newpass);
324 if (ret != LDB_SUCCESS) {
325 return ldb_operr(ldb);
326 }
327
328 return samldb_next_step(ac);
329 }
330
331 static int samldb_find_for_defaultObjectCategory(struct samldb_ctx *ac)
332 {
333 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
334 struct ldb_result *res;
335 const char *no_attrs[] = { NULL };
336 int ret;
337
338 ac->res_dn = NULL;
339
340 ret = dsdb_module_search(ac->module, ac, &res,
341 ac->dn, LDB_SCOPE_BASE, no_attrs,
342 DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT
343 | DSDB_FLAG_NEXT_MODULE,
344 "(objectClass=classSchema)");
345 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
346 /* Don't be pricky when the DN doesn't exist if we have the */
347 /* RELAX control specified */
348 if (ldb_request_get_control(ac->req,
349 LDB_CONTROL_RELAX_OID) == NULL) {
350 ldb_set_errstring(ldb,
351 "samldb_find_defaultObjectCategory: "
352 "Invalid DN for 'defaultObjectCategory'!");
353 return LDB_ERR_CONSTRAINT_VIOLATION;
354 }
355 }
356 if ((ret != LDB_ERR_NO_SUCH_OBJECT) && (ret != LDB_SUCCESS)) {
357 return ret;
358 }
359
360 ac->res_dn = ac->dn;
361
362 return samldb_next_step(ac);
363 }
364
365 /**
366 * msDS-IntId attributeSchema attribute handling
367 * during LDB_ADD request processing
368 */
369 static int samldb_add_handle_msDS_IntId(struct samldb_ctx *ac)
370 {
371 int ret;
372 bool id_exists;
373 uint32_t msds_intid;
374 int32_t system_flags;
375 struct ldb_context *ldb;
376 struct ldb_result *ldb_res;
377 struct ldb_dn *schema_dn;
378
379 ldb = ldb_module_get_ctx(ac->module);
380 schema_dn = ldb_get_schema_basedn(ldb);
381
382 /* replicated update should always go through */
383 if (ldb_request_get_control(ac->req,
384 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
385 return LDB_SUCCESS;
386 }
387
388 /* msDS-IntId is handled by system and should never be
389 * passed by clients */
390 if (ldb_msg_find_element(ac->msg, "msDS-IntId")) {
391 return LDB_ERR_UNWILLING_TO_PERFORM;
392 }
393
394 /* do not generate msDS-IntId if Relax control is passed */
395 if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
396 return LDB_SUCCESS;
397 }
398
399 /* check Functional Level */
400 if (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003) {
401 return LDB_SUCCESS;
402 }
403
404 /* check systemFlags for SCHEMA_BASE_OBJECT flag */
405 system_flags = ldb_msg_find_attr_as_int(ac->msg, "systemFlags", 0);
406 if (system_flags & SYSTEM_FLAG_SCHEMA_BASE_OBJECT) {
407 return LDB_SUCCESS;
408 }
409
410 /* Generate new value for msDs-IntId
411 * Value should be in 0x80000000..0xBFFFFFFF range */
412 msds_intid = generate_random() % 0X3FFFFFFF;
413 msds_intid += 0x80000000;
414
415 /* probe id values until unique one is found */
416 do {
417 msds_intid++;
418 if (msds_intid > 0xBFFFFFFF) {
419 msds_intid = 0x80000001;
420 }
421
422 ret = dsdb_module_search(ac->module, ac,
423 &ldb_res,
424 schema_dn, LDB_SCOPE_ONELEVEL, NULL,
425 DSDB_FLAG_NEXT_MODULE,
426 "(msDS-IntId=%d)", msds_intid);
427 if (ret != LDB_SUCCESS) {
428 ldb_debug_set(ldb, LDB_DEBUG_ERROR,
429 __location__": Searching for msDS-IntId=%d failed - %s\n",
430 msds_intid,
431 ldb_errstring(ldb));
432 return ldb_operr(ldb);
433 }
434 id_exists = (ldb_res->count > 0);
435
436 talloc_free(ldb_res);
437 } while(id_exists);
438
439 return samdb_msg_add_int(ldb, ac->msg, ac->msg, "msDS-IntId",
440 msds_intid);
441 }
442
443
444 /*
445 * samldb_add_entry (async)
446 */
447
448 static int samldb_add_entry_callback(struct ldb_request *req,
449 struct ldb_reply *ares)
450 {
451 struct ldb_context *ldb;
452 struct samldb_ctx *ac;
453 int ret;
454
455 ac = talloc_get_type(req->context, struct samldb_ctx);
456 ldb = ldb_module_get_ctx(ac->module);
457
458 if (!ares) {
459 return ldb_module_done(ac->req, NULL, NULL,
460 LDB_ERR_OPERATIONS_ERROR);
461 }
462
463 if (ares->type == LDB_REPLY_REFERRAL) {
464 return ldb_module_send_referral(ac->req, ares->referral);
465 }
466
467 if (ares->error != LDB_SUCCESS) {
468 return ldb_module_done(ac->req, ares->controls,
469 ares->response, ares->error);
470 }
471 if (ares->type != LDB_REPLY_DONE) {
472 ldb_set_errstring(ldb,
473 "Invalid reply type!\n");
474 return ldb_module_done(ac->req, NULL, NULL,
475 LDB_ERR_OPERATIONS_ERROR);
476 }
477
478 /* The caller may wish to get controls back from the add */
479 ac->ares = talloc_steal(ac, ares);
480
481 ret = samldb_next_step(ac);
482 if (ret != LDB_SUCCESS) {
483 return ldb_module_done(ac->req, NULL, NULL, ret);
484 }
485 return ret;
486 }
487
488 static int samldb_add_entry(struct samldb_ctx *ac)
489 {
490 struct ldb_context *ldb;
491 struct ldb_request *req;
492 int ret;
493
494 ldb = ldb_module_get_ctx(ac->module);
495
496 ret = ldb_build_add_req(&req, ldb, ac,
497 ac->msg,
498 ac->req->controls,
499 ac, samldb_add_entry_callback,
500 ac->req);
501 LDB_REQ_SET_LOCATION(req);
502 if (ret != LDB_SUCCESS) {
503 return ret;
504 }
505
506 return ldb_next_request(ac->module, req);
507 }
508
509 /*
510 * return true if msg carries an attributeSchema that is intended to be RODC
511 * filtered but is also a system-critical attribute.
512 */
513 static bool check_rodc_critical_attribute(struct ldb_message *msg)
514 {
515 uint32_t schemaFlagsEx, searchFlags, rodc_filtered_flags;
516
517 schemaFlagsEx = ldb_msg_find_attr_as_uint(msg, "schemaFlagsEx", 0);
518 searchFlags = ldb_msg_find_attr_as_uint(msg, "searchFlags", 0);
519 rodc_filtered_flags = (SEARCH_FLAG_RODC_ATTRIBUTE
520 | SEARCH_FLAG_CONFIDENTIAL);
521
522 if ((schemaFlagsEx & SCHEMA_FLAG_ATTR_IS_CRITICAL) &&
523 ((searchFlags & rodc_filtered_flags) == rodc_filtered_flags)) {
524 return true;
525 } else {
526 return false;
527 }
528 }
529
530
531 static int samldb_fill_object(struct samldb_ctx *ac)
532 {
533 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
534 int ret;
535
536 /* Add informations for the different account types */
537 if (strcmp(ac->type, "user") == 0) {
538 struct ldb_control *rodc_control = ldb_request_get_control(ac->req,
539 LDB_CONTROL_RODC_DCPROMO_OID);
540 if (rodc_control != NULL) {
541 /* see [MS-ADTS] 3.1.1.3.4.1.23 LDAP_SERVER_RODC_DCPROMO_OID */
542 rodc_control->critical = false;
543 ret = samldb_add_step(ac, samldb_rodc_add);
544 if (ret != LDB_SUCCESS) return ret;
545 }
546
547 /* check if we have a valid sAMAccountName */
548 ret = samldb_add_step(ac, samldb_check_sAMAccountName);
549 if (ret != LDB_SUCCESS) return ret;
550
551 ret = samldb_add_step(ac, samldb_add_entry);
552 if (ret != LDB_SUCCESS) return ret;
553
554 } else if (strcmp(ac->type, "group") == 0) {
555 /* check if we have a valid sAMAccountName */
556 ret = samldb_add_step(ac, samldb_check_sAMAccountName);
557 if (ret != LDB_SUCCESS) return ret;
558
559 ret = samldb_add_step(ac, samldb_add_entry);
560 if (ret != LDB_SUCCESS) return ret;
561
562 } else if (strcmp(ac->type, "classSchema") == 0) {
563 const struct ldb_val *rdn_value, *def_obj_cat_val;
564
565 ret = samdb_find_or_add_attribute(ldb, ac->msg,
566 "rdnAttId", "cn");
567 if (ret != LDB_SUCCESS) return ret;
568
569 /* do not allow to mark an attributeSchema as RODC filtered if it
570 * is system-critical */
571 if (check_rodc_critical_attribute(ac->msg)) {
572 ldb_asprintf_errstring(ldb, "Refusing schema add of %s - cannot combine critical class with RODC filtering",
573 ldb_dn_get_linearized(ac->msg->dn));
574 return LDB_ERR_UNWILLING_TO_PERFORM;
575 }
576
577 rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
578 if (!ldb_msg_find_element(ac->msg, "lDAPDisplayName")) {
579 /* the RDN has prefix "CN" */
580 ret = ldb_msg_add_string(ac->msg, "lDAPDisplayName",
581 samdb_cn_to_lDAPDisplayName(ac->msg,
582 (const char *) rdn_value->data));
583 if (ret != LDB_SUCCESS) {
584 ldb_oom(ldb);
585 return ret;
586 }
587 }
588
589 if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) {
590 struct GUID guid;
591 /* a new GUID */
592 guid = GUID_random();
593 ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID");
594 if (ret != LDB_SUCCESS) {
595 ldb_oom(ldb);
596 return ret;
597 }
598 }
599
600 def_obj_cat_val = ldb_msg_find_ldb_val(ac->msg,
601 "defaultObjectCategory");
602 if (def_obj_cat_val != NULL) {
603 /* "defaultObjectCategory" has been set by the caller.
604 * Do some checks for consistency.
605 * NOTE: The real constraint check (that
606 * 'defaultObjectCategory' is the DN of the new
607 * objectclass or any parent of it) is still incomplete.
608 * For now we say that 'defaultObjectCategory' is valid
609 * if it exists and it is of objectclass "classSchema".
610 */
611 ac->dn = ldb_dn_from_ldb_val(ac, ldb, def_obj_cat_val);
612 if (ac->dn == NULL) {
613 ldb_set_errstring(ldb,
614 "Invalid DN for 'defaultObjectCategory'!");
615 return LDB_ERR_CONSTRAINT_VIOLATION;
616 }
617 } else {
618 /* "defaultObjectCategory" has not been set by the
619 * caller. Use the entry DN for it. */
620 ac->dn = ac->msg->dn;
621
622 ret = ldb_msg_add_string(ac->msg, "defaultObjectCategory",
623 ldb_dn_alloc_linearized(ac->msg, ac->dn));
624 if (ret != LDB_SUCCESS) {
625 ldb_oom(ldb);
626 return ret;
627 }
628 }
629
630 ret = samldb_add_step(ac, samldb_add_entry);
631 if (ret != LDB_SUCCESS) return ret;
632
633 /* Now perform the checks for the 'defaultObjectCategory'. The
634 * lookup DN was already saved in "ac->dn" */
635 ret = samldb_add_step(ac, samldb_find_for_defaultObjectCategory);
636 if (ret != LDB_SUCCESS) return ret;
637
638 } else if (strcmp(ac->type, "attributeSchema") == 0) {
639 const struct ldb_val *rdn_value;
640 rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
641 if (!ldb_msg_find_element(ac->msg, "lDAPDisplayName")) {
642 /* the RDN has prefix "CN" */
643 ret = ldb_msg_add_string(ac->msg, "lDAPDisplayName",
644 samdb_cn_to_lDAPDisplayName(ac->msg,
645 (const char *) rdn_value->data));
646 if (ret != LDB_SUCCESS) {
647 ldb_oom(ldb);
648 return ret;
649 }
650 }
651
652 /* do not allow to mark an attributeSchema as RODC filtered if it
653 * is system-critical */
654 if (check_rodc_critical_attribute(ac->msg)) {
655 ldb_asprintf_errstring(ldb,
656 "samldb: refusing schema add of %s - cannot combine critical attribute with RODC filtering",
657 ldb_dn_get_linearized(ac->msg->dn));
658 return LDB_ERR_UNWILLING_TO_PERFORM;
659 }
660
661 ret = samdb_find_or_add_attribute(ldb, ac->msg,
662 "isSingleValued", "FALSE");
663 if (ret != LDB_SUCCESS) return ret;
664
665 if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) {
666 struct GUID guid;
667 /* a new GUID */
668 guid = GUID_random();
669 ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID");
670 if (ret != LDB_SUCCESS) {
671 ldb_oom(ldb);
672 return ret;
673 }
674 }
675
676 /* handle msDS-IntID attribute */
677 ret = samldb_add_handle_msDS_IntId(ac);
678 if (ret != LDB_SUCCESS) return ret;
679
680 ret = samldb_add_step(ac, samldb_add_entry);
681 if (ret != LDB_SUCCESS) return ret;
682
683 } else {
684 ldb_asprintf_errstring(ldb,
685 "Invalid entry type!");
686 return LDB_ERR_OPERATIONS_ERROR;
687 }
688
689 return samldb_first_step(ac);
690 }
691
692 static int samldb_fill_foreignSecurityPrincipal_object(struct samldb_ctx *ac)
693 {
694 struct ldb_context *ldb;
695 struct dom_sid *sid;
696 int ret;
697
698 ldb = ldb_module_get_ctx(ac->module);
699
700 sid = samdb_result_dom_sid(ac->msg, ac->msg, "objectSid");
701 if (sid == NULL) {
702 sid = dom_sid_parse_talloc(ac->msg,
703 (const char *)ldb_dn_get_rdn_val(ac->msg->dn)->data);
704 if (sid == NULL) {
705 ldb_set_errstring(ldb,
706 "samldb: No valid SID found in ForeignSecurityPrincipal CN!");
707 return LDB_ERR_CONSTRAINT_VIOLATION;
708 }
709 if (! samldb_msg_add_sid(ac->msg, "objectSid", sid)) {
710 return ldb_operr(ldb);
711 }
712 }
713
714 /* finally proceed with adding the entry */
715 ret = samldb_add_step(ac, samldb_add_entry);
716 if (ret != LDB_SUCCESS) return ret;
717
718 return samldb_first_step(ac);
719 }
720
721 static int samldb_schema_info_update(struct samldb_ctx *ac)
722 {
723 int ret;
724 struct ldb_context *ldb;
725 struct dsdb_schema *schema;
726
727 /* replicated update should always go through */
728 if (ldb_request_get_control(ac->req,
729 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
730 return LDB_SUCCESS;
731 }
732
733 /* do not update schemaInfo during provisioning */
734 if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
735 return LDB_SUCCESS;
736 }
737
738 ldb = ldb_module_get_ctx(ac->module);
739 schema = dsdb_get_schema(ldb, NULL);
740 if (!schema) {
741 ldb_debug_set(ldb, LDB_DEBUG_FATAL,
742 "samldb_schema_info_update: no dsdb_schema loaded");
743 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
744 return ldb_operr(ldb);
745 }
746
747 ret = dsdb_module_schema_info_update(ac->module, schema,
748 DSDB_FLAG_NEXT_MODULE);
749 if (ret != LDB_SUCCESS) {
750 ldb_asprintf_errstring(ldb,
751 "samldb_schema_info_update: dsdb_module_schema_info_update failed with %s",
752 ldb_errstring(ldb));
753 return ret;
754 }
755
756 return LDB_SUCCESS;
757 }
758
759 /*
760 * "Objectclass" trigger (MS-SAMR 3.1.1.8.1)
761 *
762 * Has to be invoked on "add" and "modify" operations on "user", "computer" and
763 * "group" objects.
764 * ac->msg contains the "add"/"modify" message
765 * ac->type contains the object type (main objectclass)
766 */
767 static int samldb_objectclass_trigger(struct samldb_ctx *ac)
768 {
769 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
770 struct loadparm_context *lp_ctx = talloc_get_type(ldb_get_opaque(ldb,
771 "loadparm"), struct loadparm_context);
772 struct ldb_message_element *el, *el2;
773 enum sid_generator sid_generator;
774 struct dom_sid *sid;
775 const char *tempstr;
776 int ret;
777
778 /* make sure that "sAMAccountType" is not specified */
779 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
780 if (el != NULL) {
781 ldb_set_errstring(ldb,
782 "samldb: sAMAccountType must not be specified!");
783 return LDB_ERR_UNWILLING_TO_PERFORM;
784 }
785
786 /* Step 1: objectSid assignment */
787
788 /* Don't allow the objectSid to be changed. But beside the RELAX
789 * control we have also to guarantee that it can always be set with
790 * SYSTEM permissions. This is needed for the "samba3sam" backend. */
791 sid = samdb_result_dom_sid(ac, ac->msg, "objectSid");
792 if ((sid != NULL) && (!dsdb_module_am_system(ac->module)) &&
793 (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) == NULL)) {
794 ldb_set_errstring(ldb,
795 "samldb: objectSid must not be specified!");
796 return LDB_ERR_UNWILLING_TO_PERFORM;
797 }
798
799 /* but generate a new SID when we do have an add operations */
800 if ((sid == NULL) && (ac->req->operation == LDB_ADD)) {
801 sid_generator = lpcfg_sid_generator(lp_ctx);
802 if (sid_generator == SID_GENERATOR_INTERNAL) {
803 ret = samldb_add_step(ac, samldb_allocate_sid);
804 if (ret != LDB_SUCCESS) return ret;
805 }
806 }
807
808 if (strcmp(ac->type, "user") == 0) {
809 /* Step 1.2: Default values */
810 tempstr = talloc_asprintf(ac->msg, "%d", UF_NORMAL_ACCOUNT);
811 if (tempstr == NULL) return ldb_operr(ldb);
812 ret = samdb_find_or_add_attribute(ldb, ac->msg,
813 "userAccountControl", tempstr);
814 if (ret != LDB_SUCCESS) return ret;
815 ret = samdb_find_or_add_attribute(ldb, ac->msg,
816 "badPwdCount", "0");
817 if (ret != LDB_SUCCESS) return ret;
818 ret = samdb_find_or_add_attribute(ldb, ac->msg,
819 "codePage", "0");
820 if (ret != LDB_SUCCESS) return ret;
821 ret = samdb_find_or_add_attribute(ldb, ac->msg,
822 "countryCode", "0");
823 if (ret != LDB_SUCCESS) return ret;
824 ret = samdb_find_or_add_attribute(ldb, ac->msg,
825 "badPasswordTime", "0");
826 if (ret != LDB_SUCCESS) return ret;
827 ret = samdb_find_or_add_attribute(ldb, ac->msg,
828 "lastLogoff", "0");
829 if (ret != LDB_SUCCESS) return ret;
830 ret = samdb_find_or_add_attribute(ldb, ac->msg,
831 "lastLogon", "0");
832 if (ret != LDB_SUCCESS) return ret;
833 ret = samdb_find_or_add_attribute(ldb, ac->msg,
834 "pwdLastSet", "0");
835 if (ret != LDB_SUCCESS) return ret;
836 ret = samdb_find_or_add_attribute(ldb, ac->msg,
837 "accountExpires", "9223372036854775807");
838 if (ret != LDB_SUCCESS) return ret;
839 ret = samdb_find_or_add_attribute(ldb, ac->msg,
840 "logonCount", "0");
841 if (ret != LDB_SUCCESS) return ret;
842
843 el = ldb_msg_find_element(ac->msg, "userAccountControl");
844 if (el != NULL) {
845 uint32_t user_account_control, account_type;
846
847 /* Step 1.3: "userAccountControl" -> "sAMAccountType" mapping */
848 user_account_control = ldb_msg_find_attr_as_uint(ac->msg,
849 "userAccountControl",
850 0);
851
852 /* Temporary duplicate accounts aren't allowed */
853 if ((user_account_control & UF_TEMP_DUPLICATE_ACCOUNT) != 0) {
854 return LDB_ERR_OTHER;
855 }
856
857 account_type = ds_uf2atype(user_account_control);
858 if (account_type == 0) {
859 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
860 return LDB_ERR_UNWILLING_TO_PERFORM;
861 }
862 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
863 "sAMAccountType",
864 account_type);
865 if (ret != LDB_SUCCESS) {
866 return ret;
867 }
868 el2 = ldb_msg_find_element(ac->msg, "sAMAccountType");
869 el2->flags = LDB_FLAG_MOD_REPLACE;
870
871 if (user_account_control &
872 (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
873 ret = samdb_msg_set_string(ldb, ac->msg, ac->msg,
874 "isCriticalSystemObject",
875 "TRUE");
876 if (ret != LDB_SUCCESS) {
877 return ret;
878 }
879 el2 = ldb_msg_find_element(ac->msg,
880 "isCriticalSystemObject");
881 el2->flags = LDB_FLAG_MOD_REPLACE;
882 }
883
884 /* Step 1.4: "userAccountControl" -> "primaryGroupID" mapping */
885 if (!ldb_msg_find_element(ac->msg, "primaryGroupID")) {
886 uint32_t rid = ds_uf2prim_group_rid(user_account_control);
887 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
888 "primaryGroupID", rid);
889 if (ret != LDB_SUCCESS) {
890 return ret;
891 }
892 el2 = ldb_msg_find_element(ac->msg,
893 "primaryGroupID");
894 el2->flags = LDB_FLAG_MOD_REPLACE;
895 }
896
897 /* Step 1.5: Add additional flags when needed */
898 if ((user_account_control & UF_NORMAL_ACCOUNT) &&
899 (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) == NULL)) {
900 user_account_control |= UF_ACCOUNTDISABLE;
901 user_account_control |= UF_PASSWD_NOTREQD;
902
903 ret = samdb_msg_set_uint(ldb, ac->msg, ac->msg,
904 "userAccountControl",
905 user_account_control);
906 if (ret != LDB_SUCCESS) {
907 return ret;
908 }
909 }
910 }
911
912 } else if (strcmp(ac->type, "group") == 0) {
913 /* Step 2.2: Default values */
914 tempstr = talloc_asprintf(ac->msg, "%d",
915 GTYPE_SECURITY_GLOBAL_GROUP);
916 if (tempstr == NULL) return ldb_operr(ldb);
917 ret = samdb_find_or_add_attribute(ldb, ac->msg,
918 "groupType", tempstr);
919 if (ret != LDB_SUCCESS) return ret;
920
921 /* Step 2.3: "groupType" -> "sAMAccountType" */
922 el = ldb_msg_find_element(ac->msg, "groupType");
923 if (el != NULL) {
924 uint32_t group_type, account_type;
925
926 group_type = ldb_msg_find_attr_as_uint(ac->msg,
927 "groupType", 0);
928
929 /* The creation of builtin groups requires the
930 * RELAX control */
931 if (group_type == GTYPE_SECURITY_BUILTIN_LOCAL_GROUP) {
932 if (ldb_request_get_control(ac->req,
933 LDB_CONTROL_RELAX_OID) == NULL) {
934 return LDB_ERR_UNWILLING_TO_PERFORM;
935 }
936 }
937
938 account_type = ds_gtype2atype(group_type);
939 if (account_type == 0) {
940 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
941 return LDB_ERR_UNWILLING_TO_PERFORM;
942 }
943 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
944 "sAMAccountType",
945 account_type);
946 if (ret != LDB_SUCCESS) {
947 return ret;
948 }
949 el2 = ldb_msg_find_element(ac->msg, "sAMAccountType");
950 el2->flags = LDB_FLAG_MOD_REPLACE;
951 }
952 }
953
954 return LDB_SUCCESS;
955 }
956
957 /*
958 * "Primary group ID" trigger (MS-SAMR 3.1.1.8.2)
959 *
960 * Has to be invoked on "add" and "modify" operations on "user" and "computer"
961 * objects.
962 * ac->msg contains the "add"/"modify" message
963 */
964
965 static int samldb_prim_group_set(struct samldb_ctx *ac)
966 {
967 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
968 struct ldb_dn *prim_group_dn;
969 uint32_t rid;
970 struct dom_sid *sid;
971
972 rid = ldb_msg_find_attr_as_uint(ac->msg, "primaryGroupID", (uint32_t) -1);
973 if (rid == (uint32_t) -1) {
974 /* we aren't affected of any primary group set */
975 return LDB_SUCCESS;
976
977 } else if (!ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
978 ldb_set_errstring(ldb,
979 "The primary group isn't settable on add operations!");
980 return LDB_ERR_UNWILLING_TO_PERFORM;
981 }
982
983 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
984 if (sid == NULL) {
985 return ldb_operr(ldb);
986 }
987
988 prim_group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSid=%s)",
989 ldap_encode_ndr_dom_sid(ac, sid));
990 if (prim_group_dn == NULL) {
991 ldb_asprintf_errstring(ldb,
992 "Failed to find primary group with RID %u!",
993 rid);
994 return LDB_ERR_UNWILLING_TO_PERFORM;
995 }
996
997 return LDB_SUCCESS;
998 }
999
1000 static int samldb_prim_group_change(struct samldb_ctx *ac)
1001 {
1002 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1003 const char * attrs[] = { "primaryGroupID", "memberOf", NULL };
1004 struct ldb_result *res;
1005 struct ldb_message_element *el;
1006 struct ldb_message *msg;
1007 uint32_t rid;
1008 struct dom_sid *sid;
1009 struct ldb_dn *prev_prim_group_dn, *new_prim_group_dn;
1010 int ret;
1011
1012 el = dsdb_get_single_valued_attr(ac->msg, "primaryGroupID");
1013 if (el == NULL) {
1014 /* we are not affected */
1015 return LDB_SUCCESS;
1016 }
1017
1018 /* Fetch informations from the existing object */
1019
1020 ret = ldb_search(ldb, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1021 NULL);
1022 if (ret != LDB_SUCCESS) {
1023 return ret;
1024 }
1025 if (res->count != 1) {
1026 return ldb_operr(ldb);
1027 }
1028
1029 /* Finds out the DN of the old primary group */
1030
1031 rid = ldb_msg_find_attr_as_uint(res->msgs[0], "primaryGroupID", (uint32_t) -1);
1032 if (rid == (uint32_t) -1) {
1033 /* User objects do always have a mandatory "primaryGroupID"
1034 * attribute. If this doesn't exist then the object is of the
1035 * wrong type. This is the exact Windows error code */
1036 return LDB_ERR_OBJECT_CLASS_VIOLATION;
1037 }
1038
1039 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
1040 if (sid == NULL) {
1041 return ldb_operr(ldb);
1042 }
1043
1044 prev_prim_group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSid=%s)",
1045 ldap_encode_ndr_dom_sid(ac, sid));
1046 if (prev_prim_group_dn == NULL) {
1047 return ldb_operr(ldb);
1048 }
1049
1050 /* Finds out the DN of the new primary group
1051 * Notice: in order to parse the primary group ID correctly we create
1052 * a temporary message here. */
1053
1054 msg = ldb_msg_new(ac->msg);
1055 if (msg == NULL) {
1056 return ldb_module_oom(ac->module);
1057 }
1058 ret = ldb_msg_add(msg, el, 0);
1059 if (ret != LDB_SUCCESS) {
1060 return ret;
1061 }
1062 rid = ldb_msg_find_attr_as_uint(msg, "primaryGroupID", (uint32_t) -1);
1063 talloc_free(msg);
1064 if (rid == (uint32_t) -1) {
1065 /* we aren't affected of any primary group change */
1066 return LDB_SUCCESS;
1067 }
1068
1069 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
1070 if (sid == NULL) {
1071 return ldb_operr(ldb);
1072 }
1073
1074 new_prim_group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSid=%s)",
1075 ldap_encode_ndr_dom_sid(ac, sid));
1076 if (new_prim_group_dn == NULL) {
1077 /* Here we know if the specified new primary group candidate is
1078 * valid or not. */
1079 return LDB_ERR_UNWILLING_TO_PERFORM;
1080 }
1081
1082 /* Only update the "member" attributes when we really do have a change */
1083 if (ldb_dn_compare(new_prim_group_dn, prev_prim_group_dn) != 0) {
1084 /* We need to be already a normal member of the new primary
1085 * group in order to be successful. */
1086 el = samdb_find_attribute(ldb, res->msgs[0], "memberOf",
1087 ldb_dn_get_linearized(new_prim_group_dn));
1088 if (el == NULL) {
1089 return LDB_ERR_UNWILLING_TO_PERFORM;
1090 }
1091
1092 /* Remove the "member" attribute on the new primary group */
1093 msg = ldb_msg_new(ac->msg);
1094 if (msg == NULL) {
1095 return ldb_module_oom(ac->module);
1096 }
1097 msg->dn = new_prim_group_dn;
1098
1099 ret = samdb_msg_add_delval(ldb, msg, msg, "member",
1100 ldb_dn_get_linearized(ac->msg->dn));
1101 if (ret != LDB_SUCCESS) {
1102 return ret;
1103 }
1104
1105 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE);
1106 if (ret != LDB_SUCCESS) {
1107 return ret;
1108 }
1109 talloc_free(msg);
1110
1111 /* Add a "member" attribute for the previous primary group */
1112 msg = ldb_msg_new(ac->msg);
1113 if (msg == NULL) {
1114 return ldb_module_oom(ac->module);
1115 }
1116 msg->dn = prev_prim_group_dn;
1117
1118 ret = samdb_msg_add_addval(ldb, msg, msg, "member",
1119 ldb_dn_get_linearized(ac->msg->dn));
1120 if (ret != LDB_SUCCESS) {
1121 return ret;
1122 }
1123
1124 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE);
1125 if (ret != LDB_SUCCESS) {
1126 return ret;
1127 }
1128 talloc_free(msg);
1129 }
1130
1131 talloc_free(res);
1132
1133 return LDB_SUCCESS;
1134 }
1135
1136 static int samldb_prim_group_trigger(struct samldb_ctx *ac)
1137 {
1138 int ret;
1139
1140 if (ac->req->operation == LDB_ADD) {
1141 ret = samldb_prim_group_set(ac);
1142 } else {
1143 ret = samldb_prim_group_change(ac);
1144 }
1145
1146 return ret;
1147 }
1148
1149 static int samldb_user_account_control_change(struct samldb_ctx *ac)
1150 {
1151 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1152 uint32_t user_account_control, account_type;
1153 struct ldb_message_element *el;
1154 struct ldb_message *tmp_msg;
1155 int ret;
1156
1157 el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl");
1158 if (el == NULL) {
1159 /* we are not affected */
1160 return LDB_SUCCESS;
1161 }
1162
1163 /* Create a temporary message for fetching the "userAccountControl" */
1164 tmp_msg = ldb_msg_new(ac->msg);
1165 if (tmp_msg == NULL) {
1166 return ldb_module_oom(ac->module);
1167 }
1168 ret = ldb_msg_add(tmp_msg, el, 0);
1169 if (ret != LDB_SUCCESS) {
1170 return ret;
1171 }
1172 user_account_control = ldb_msg_find_attr_as_uint(tmp_msg,
1173 "userAccountControl",
1174 0);
1175 talloc_free(tmp_msg);
1176
1177 /* Temporary duplicate accounts aren't allowed */
1178 if ((user_account_control & UF_TEMP_DUPLICATE_ACCOUNT) != 0) {
1179 return LDB_ERR_OTHER;
1180 }
1181
1182 account_type = ds_uf2atype(user_account_control);
1183 if (account_type == 0) {
1184 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
1185 return LDB_ERR_UNWILLING_TO_PERFORM;
1186 }
1187 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType",
1188 account_type);
1189 if (ret != LDB_SUCCESS) {
1190 return ret;
1191 }
1192 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
1193 el->flags = LDB_FLAG_MOD_REPLACE;
1194
1195 if (user_account_control
1196 & (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
1197 ret = samdb_msg_add_string(ldb, ac->msg, ac->msg,
1198 "isCriticalSystemObject", "TRUE");
1199 if (ret != LDB_SUCCESS) {
1200 return ret;
1201 }
1202 el = ldb_msg_find_element(ac->msg,
1203 "isCriticalSystemObject");
1204 el->flags = LDB_FLAG_MOD_REPLACE;
1205 }
1206
1207 if (!ldb_msg_find_element(ac->msg, "primaryGroupID")) {
1208 uint32_t rid = ds_uf2prim_group_rid(user_account_control);
1209 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1210 "primaryGroupID", rid);
1211 if (ret != LDB_SUCCESS) {
1212 return ret;
1213 }
1214 el = ldb_msg_find_element(ac->msg,
1215 "primaryGroupID");
1216 el->flags = LDB_FLAG_MOD_REPLACE;
1217 }
1218
1219 return LDB_SUCCESS;
1220 }
1221
1222 static int samldb_group_type_change(struct samldb_ctx *ac)
1223 {
1224 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1225 uint32_t group_type, old_group_type, account_type;
1226 struct ldb_message_element *el;
1227 struct ldb_message *tmp_msg;
1228 int ret;
1229
1230 el = dsdb_get_single_valued_attr(ac->msg, "groupType");
1231 if (el == NULL) {
1232 /* we are not affected */
1233 return LDB_SUCCESS;
1234 }
1235
1236 /* Create a temporary message for fetching the "groupType" */
1237 tmp_msg = ldb_msg_new(ac->msg);
1238 if (tmp_msg == NULL) {
1239 return ldb_module_oom(ac->module);
1240 }
1241 ret = ldb_msg_add(tmp_msg, el, 0);
1242 if (ret != LDB_SUCCESS) {
1243 return ret;
1244 }
1245 group_type = ldb_msg_find_attr_as_uint(tmp_msg, "groupType", 0);
1246 talloc_free(tmp_msg);
1247
1248 old_group_type = samdb_search_uint(ldb, ac, 0, ac->msg->dn,
1249 "groupType", NULL);
1250 if (old_group_type == 0) {
1251 return ldb_operr(ldb);
1252 }
1253
1254 /* Group type switching isn't so easy as it seems: We can only
1255 * change in this directions: global <-> universal <-> local
1256 * On each step also the group type itself
1257 * (security/distribution) is variable. */
1258
1259 switch (group_type) {
1260 case GTYPE_SECURITY_GLOBAL_GROUP:
1261 case GTYPE_DISTRIBUTION_GLOBAL_GROUP:
1262 /* change to "universal" allowed */
1263 if ((old_group_type == GTYPE_SECURITY_DOMAIN_LOCAL_GROUP) ||
1264 (old_group_type == GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP)) {
1265 return LDB_ERR_UNWILLING_TO_PERFORM;
1266 }
1267 break;
1268
1269 case GTYPE_SECURITY_UNIVERSAL_GROUP:
1270 case GTYPE_DISTRIBUTION_UNIVERSAL_GROUP:
1271 /* each change allowed */
1272 break;
1273
1274 case GTYPE_SECURITY_DOMAIN_LOCAL_GROUP:
1275 case GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP:
1276 /* change to "universal" allowed */
1277 if ((old_group_type == GTYPE_SECURITY_GLOBAL_GROUP) ||
1278 (old_group_type == GTYPE_DISTRIBUTION_GLOBAL_GROUP)) {
1279 return LDB_ERR_UNWILLING_TO_PERFORM;
1280 }
1281 break;
1282
1283 case GTYPE_SECURITY_BUILTIN_LOCAL_GROUP:
1284 default:
1285 /* we don't allow this "groupType" values */
1286 return LDB_ERR_UNWILLING_TO_PERFORM;
1287 break;
1288 }
1289
1290 account_type = ds_gtype2atype(group_type);
1291 if (account_type == 0) {
1292 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
1293 return LDB_ERR_UNWILLING_TO_PERFORM;
1294 }
1295 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType",
1296 account_type);
1297 if (ret != LDB_SUCCESS) {
1298 return ret;
1299 }
1300 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
1301 el->flags = LDB_FLAG_MOD_REPLACE;
1302
1303 return LDB_SUCCESS;
1304 }
1305
1306 static int samldb_sam_accountname_check(struct samldb_ctx *ac)
1307 {
1308 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1309 const char *no_attrs[] = { NULL };
1310 struct ldb_result *res;
1311 const char *sam_accountname, *enc_str;
1312 struct ldb_message_element *el;
1313 struct ldb_message *tmp_msg;
1314 int ret;
1315
1316 el = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName");
1317 if (el == NULL) {
1318 /* we are not affected */
1319 return LDB_SUCCESS;
1320 }
1321
1322 /* Create a temporary message for fetching the "sAMAccountName" */
1323 tmp_msg = ldb_msg_new(ac->msg);
1324 if (tmp_msg == NULL) {
1325 return ldb_module_oom(ac->module);
1326 }
1327 ret = ldb_msg_add(tmp_msg, el, 0);
1328 if (ret != LDB_SUCCESS) {
1329 return ret;
1330 }
1331 sam_accountname = talloc_steal(ac,
1332 ldb_msg_find_attr_as_string(tmp_msg, "sAMAccountName", NULL));
1333 talloc_free(tmp_msg);
1334
1335 if (sam_accountname == NULL) {
1336 /* The "sAMAccountName" cannot be nothing */
1337 ldb_set_errstring(ldb,
1338 "samldb: Empty account names aren't allowed!");
1339 return LDB_ERR_UNWILLING_TO_PERFORM;
1340 }
1341
1342 enc_str = ldb_binary_encode_string(ac, sam_accountname);
1343 if (enc_str == NULL) {
1344 return ldb_module_oom(ac->module);
1345 }
1346
1347 /* Make sure that a "sAMAccountName" is only used once */
1348
1349 ret = ldb_search(ldb, ac, &res, NULL, LDB_SCOPE_SUBTREE, no_attrs,
1350 "(sAMAccountName=%s)", enc_str);
1351 if (ret != LDB_SUCCESS) {
1352 return ret;
1353 }
1354 if (res->count > 1) {
1355 return ldb_operr(ldb);
1356 } else if (res->count == 1) {
1357 if (ldb_dn_compare(res->msgs[0]->dn, ac->msg->dn) != 0) {
1358 ldb_asprintf_errstring(ldb,
1359 "samldb: Account name (sAMAccountName) '%s' already in use!",
1360 sam_accountname);
1361 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1362 }
1363 }
1364 talloc_free(res);
1365
1366 return LDB_SUCCESS;
1367 }
1368
1369 static int samldb_member_check(struct samldb_ctx *ac)
1370 {
1371 static const char * const attrs[] = { "objectSid", "member", NULL };
1372 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1373 struct ldb_message_element *el;
1374 struct ldb_dn *member_dn;
1375 uint32_t prim_group_rid;
1376 struct dom_sid *sid;
1377 struct ldb_result *res;
1378 struct dom_sid *group_sid;
1379 unsigned int i, j;
1380 int cnt;
1381 int ret;
1382
1383 /* Fetch informations from the existing object */
1384
1385 ret = ldb_search(ldb, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1386 NULL);
1387 if (ret != LDB_SUCCESS) {
1388 return ret;
1389 }
1390 if (res->count != 1) {
1391 return ldb_operr(ldb);
1392 }
1393
1394 group_sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
1395 if (group_sid == NULL) {
1396 return ldb_operr(ldb);
1397 }
1398
1399 /* We've to walk over all modification entries and consider the "member"
1400 * ones. */
1401 for (i = 0; i < ac->msg->num_elements; i++) {
1402 if (ldb_attr_cmp(ac->msg->elements[i].name, "member") != 0) {
1403 continue;
1404 }
1405
1406 el = &ac->msg->elements[i];
1407 for (j = 0; j < el->num_values; j++) {
1408 struct ldb_message_element *mo;
1409
1410 member_dn = ldb_dn_from_ldb_val(ac, ldb,
1411 &el->values[j]);
1412 if (!ldb_dn_validate(member_dn)) {
1413 return ldb_operr(ldb);
1414 }
1415
1416 /* The "member" attribute can be modified with the
1417 * following restrictions (beside a valid DN):
1418 *
1419 * - "add" operations can only be performed when the
1420 * member still doesn't exist - if not then return
1421 * ERR_ENTRY_ALREADY_EXISTS (not
1422 * ERR_ATTRIBUTE_OR_VALUE_EXISTS!)
1423 * - "delete" operations can only be performed when the
1424 * member does exist - if not then return
1425 * ERR_UNWILLING_TO_PERFORM (not
1426 * ERR_NO_SUCH_ATTRIBUTE!)
1427 * - primary group check
1428 */
1429 mo = samdb_find_attribute(ldb, res->msgs[0], "member",
1430 ldb_dn_get_linearized(member_dn));
1431 if (mo == NULL) {
1432 cnt = 0;
1433 } else {
1434 cnt = 1;
1435 }
1436
1437 if ((cnt > 0) && (LDB_FLAG_MOD_TYPE(el->flags)
1438 == LDB_FLAG_MOD_ADD)) {
1439 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1440 }
1441 if ((cnt == 0) && LDB_FLAG_MOD_TYPE(el->flags)
1442 == LDB_FLAG_MOD_DELETE) {
1443 return LDB_ERR_UNWILLING_TO_PERFORM;
1444 }
1445
1446 /* Denies to add "member"s to groups which are primary
1447 * ones for them - in this case return
1448 * ERR_ENTRY_ALREADY_EXISTS. */
1449
1450 prim_group_rid = samdb_search_uint(ldb, ac,
1451 (uint32_t) -1,
1452 member_dn,
1453 "primaryGroupID",
1454 NULL);
1455 if (prim_group_rid == (uint32_t) -1) {
1456 /* the member hasn't to be a user account ->
1457 * therefore no check needed in this case. */
1458 continue;
1459 }
1460
1461 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb),
1462 prim_group_rid);
1463 if (sid == NULL) {
1464 return ldb_operr(ldb);
1465 }
1466
1467 if (dom_sid_equal(group_sid, sid)) {
1468 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1469 }
1470 }
1471 }
1472
1473 return LDB_SUCCESS;
1474 }
1475
1476 /* This trigger adapts the "servicePrincipalName" attributes if the
1477 * "dNSHostName" and/or "sAMAccountName" attribute change(s) */
1478 static int samldb_service_principal_names_change(struct samldb_ctx *ac)
1479 {
1480 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1481 struct ldb_message_element *el = NULL, *el2 = NULL;
1482 struct ldb_message *msg;
1483 const char *attrs[] = { "servicePrincipalName", NULL };
1484 struct ldb_result *res;
1485 const char *dns_hostname = NULL, *old_dns_hostname = NULL,
1486 *sam_accountname = NULL, *old_sam_accountname = NULL;
1487 unsigned int i;
1488 int ret;
1489
1490 el = dsdb_get_single_valued_attr(ac->msg, "dNSHostName");
1491 el2 = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName");
1492 if ((el == NULL) && (el2 == NULL)) {
1493 /* we are not affected */
1494 return LDB_SUCCESS;
1495 }
1496
1497 /* Create a temporary message for fetching the "dNSHostName" */
1498 if (el != NULL) {
1499 msg = ldb_msg_new(ac->msg);
1500 if (msg == NULL) {
1501 return ldb_module_oom(ac->module);
1502 }
1503 ret = ldb_msg_add(msg, el, 0);
1504 if (ret != LDB_SUCCESS) {
1505 return ret;
1506 }
1507 dns_hostname = talloc_steal(ac,
1508 ldb_msg_find_attr_as_string(msg, "dNSHostName", NULL));
1509 talloc_free(msg);
1510
1511 old_dns_hostname = samdb_search_string(ldb, ac, ac->msg->dn,
1512 "dNSHostName", NULL);
1513 }
1514
1515 /* Create a temporary message for fetching the "sAMAccountName" */
1516 if (el2 != NULL) {
1517 char *tempstr, *tempstr2;
1518
1519 msg = ldb_msg_new(ac->msg);
1520 if (msg == NULL) {
1521 return ldb_module_oom(ac->module);
1522 }
1523 ret = ldb_msg_add(msg, el2, 0);
1524 if (ret != LDB_SUCCESS) {
1525 return ret;
1526 }
1527 tempstr = talloc_strdup(ac,
1528 ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL));
1529 talloc_free(msg);
1530
1531 tempstr2 = talloc_strdup(ac,
1532 samdb_search_string(ldb, ac, ac->msg->dn, "sAMAccountName", NULL));
1533
1534 /* The "sAMAccountName" needs some additional trimming: we need
1535 * to remove the trailing "$"s if they exist. */
1536 if ((tempstr != NULL) && (tempstr[0] != '\0') &&
1537 (tempstr[strlen(tempstr) - 1] == '$')) {
1538 tempstr[strlen(tempstr) - 1] = '\0';
1539 }
1540 if ((tempstr2 != NULL) && (tempstr2[0] != '\0') &&
1541 (tempstr2[strlen(tempstr2) - 1] == '$')) {
1542 tempstr2[strlen(tempstr2) - 1] = '\0';
1543 }
1544 sam_accountname = tempstr;
1545 old_sam_accountname = tempstr2;
1546 }
1547
1548 if (old_dns_hostname == NULL) {
1549 /* we cannot change when the old name is unknown */
1550 dns_hostname = NULL;
1551 }
1552 if ((old_dns_hostname != NULL) && (dns_hostname != NULL) &&
1553 (strcasecmp(old_dns_hostname, dns_hostname) == 0)) {
1554 /* The "dNSHostName" didn't change */
1555 dns_hostname = NULL;
1556 }
1557
1558 if (old_sam_accountname == NULL) {
1559 /* we cannot change when the old name is unknown */
1560 sam_accountname = NULL;
1561 }
1562 if ((old_sam_accountname != NULL) && (sam_accountname != NULL) &&
1563 (strcasecmp(old_sam_accountname, sam_accountname) == 0)) {
1564 /* The "sAMAccountName" didn't change */
1565 sam_accountname = NULL;
1566 }
1567
1568 if ((dns_hostname == NULL) && (sam_accountname == NULL)) {
1569 /* Well, there are informations missing (old name(s)) or the
1570 * names didn't change. We've nothing to do and can exit here */
1571 return LDB_SUCCESS;
1572 }
1573
1574 /* Potential "servicePrincipalName" changes in the same request have to
1575 * be handled before the update (Windows behaviour). */
1576 el = ldb_msg_find_element(ac->msg, "servicePrincipalName");
1577 if (el != NULL) {
1578 msg = ldb_msg_new(ac->msg);
1579 if (msg == NULL) {
1580 return ldb_module_oom(ac->module);
1581 }
1582 msg->dn = ac->msg->dn;
1583
1584 do {
1585 ret = ldb_msg_add(msg, el, el->flags);
1586 if (ret != LDB_SUCCESS) {
1587 return ret;
1588 }
1589
1590 ldb_msg_remove_element(ac->msg, el);
1591
1592 el = ldb_msg_find_element(ac->msg,
1593 "servicePrincipalName");
1594 } while (el != NULL);
1595
1596 ret = dsdb_module_modify(ac->module, msg,
1597 DSDB_FLAG_NEXT_MODULE);
1598 if (ret != LDB_SUCCESS) {
1599 return ret;
1600 }
1601 talloc_free(msg);
1602 }
1603
1604 /* Fetch the "servicePrincipalName"s if any */
1605 ret = ldb_search(ldb, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1606 NULL);
1607 if (ret != LDB_SUCCESS) {
1608 return ret;
1609 }
1610 if ((res->count != 1) || (res->msgs[0]->num_elements > 1)) {
1611 return ldb_operr(ldb);
1612 }
1613
1614 if (res->msgs[0]->num_elements == 1) {
1615 /* Yes, we do have "servicePrincipalName"s. First we update them
1616 * locally, that means we do always substitute the current
1617 * "dNSHostName" with the new one and/or "sAMAccountName"
1618 * without "$" with the new one and then we append this to the
1619 * modification request (Windows behaviour). */
1620
1621 for (i = 0; i < res->msgs[0]->elements[0].num_values; i++) {
1622 char *old_str, *new_str, *pos;
1623 const char *tok;
1624
1625 old_str = (char *)
1626 res->msgs[0]->elements[0].values[i].data;
1627
1628 new_str = talloc_strdup(ac->msg,
1629 strtok_r(old_str, "/", &pos));
1630 if (new_str == NULL) {
1631 return ldb_module_oom(ac->module);
1632 }
1633
1634 while ((tok = strtok_r(NULL, "/", &pos)) != NULL) {
1635 if ((dns_hostname != NULL) &&
1636 (strcasecmp(tok, old_dns_hostname) == 0)) {
1637 tok = dns_hostname;
1638 }
1639 if ((sam_accountname != NULL) &&
1640 (strcasecmp(tok, old_sam_accountname) == 0)) {
1641 tok = sam_accountname;
1642 }
1643
1644 new_str = talloc_asprintf(ac->msg, "%s/%s",
1645 new_str, tok);
1646 if (new_str == NULL) {
1647 return ldb_module_oom(ac->module);
1648 }
1649 }
1650
1651 ret = ldb_msg_add_string(ac->msg,
1652 "servicePrincipalName",
1653 new_str);
1654 if (ret != LDB_SUCCESS) {
1655 return ret;
1656 }
1657 }
1658
1659 el = ldb_msg_find_element(ac->msg, "servicePrincipalName");
1660 el->flags = LDB_FLAG_MOD_REPLACE;
1661 }
1662
1663 talloc_free(res);
1664
1665 return LDB_SUCCESS;
1666 }
1667
1668
1669 /* add */
1670 static int samldb_add(struct ldb_module *module, struct ldb_request *req)
1671 {
1672 struct ldb_context *ldb;
1673 struct samldb_ctx *ac;
1674 int ret;
1675
1676 ldb = ldb_module_get_ctx(module);
1677 ldb_debug(ldb, LDB_DEBUG_TRACE, "samldb_add\n");
1678
1679 /* do not manipulate our control entries */
1680 if (ldb_dn_is_special(req->op.add.message->dn)) {
1681 return ldb_next_request(module, req);
1682 }
1683
1684 ac = samldb_ctx_init(module, req);
1685 if (ac == NULL) {
1686 return ldb_operr(ldb);
1687 }
1688
1689 /* build the new msg */
1690 ac->msg = ldb_msg_copy_shallow(ac, req->op.add.message);
1691 if (ac->msg == NULL) {
1692 talloc_free(ac);
1693 ldb_debug(ldb, LDB_DEBUG_FATAL,
1694 "samldb_add: ldb_msg_copy_shallow failed!\n");
1695 return ldb_operr(ldb);
1696 }
1697
1698 if (samdb_find_attribute(ldb, ac->msg,
1699 "objectclass", "user") != NULL) {
1700 ac->type = "user";
1701
1702 ret = samldb_prim_group_trigger(ac);
1703 if (ret != LDB_SUCCESS) {
1704 return ret;
1705 }
1706
1707 ret = samldb_objectclass_trigger(ac);
1708 if (ret != LDB_SUCCESS) {
1709 return ret;
1710 }
1711
1712 return samldb_fill_object(ac);
1713 }
1714
1715 if (samdb_find_attribute(ldb, ac->msg,
1716 "objectclass", "group") != NULL) {
1717 ac->type = "group";
1718
1719 ret = samldb_objectclass_trigger(ac);
1720 if (ret != LDB_SUCCESS) {
1721 return ret;
1722 }
1723
1724 return samldb_fill_object(ac);
1725 }
1726
1727 /* perhaps a foreignSecurityPrincipal? */
1728 if (samdb_find_attribute(ldb, ac->msg,
1729 "objectclass",
1730 "foreignSecurityPrincipal") != NULL) {
1731 return samldb_fill_foreignSecurityPrincipal_object(ac);
1732 }
1733
1734 if (samdb_find_attribute(ldb, ac->msg,
1735 "objectclass", "classSchema") != NULL) {
1736 ret = samldb_schema_info_update(ac);
1737 if (ret != LDB_SUCCESS) {
1738 talloc_free(ac);
1739 return ret;
1740 }
1741
1742 ac->type = "classSchema";
1743 return samldb_fill_object(ac);
1744 }
1745
1746 if (samdb_find_attribute(ldb, ac->msg,
1747 "objectclass", "attributeSchema") != NULL) {
1748 ret = samldb_schema_info_update(ac);
1749 if (ret != LDB_SUCCESS) {
1750 talloc_free(ac);
1751 return ret;
1752 }
1753
1754 ac->type = "attributeSchema";
1755 return samldb_fill_object(ac);
1756 }
1757
1758 talloc_free(ac);
1759
1760 /* nothing matched, go on */
1761 return ldb_next_request(module, req);
1762 }
1763
1764 /* modify */
1765 static int samldb_modify(struct ldb_module *module, struct ldb_request *req)
1766 {
1767 struct ldb_context *ldb;
1768 struct samldb_ctx *ac;
1769 struct ldb_message_element *el, *el2;
1770 bool modified = false;
1771 int ret;
1772
1773 if (ldb_dn_is_special(req->op.mod.message->dn)) {
1774 /* do not manipulate our control entries */
1775 return ldb_next_request(module, req);
1776 }
1777
1778 ldb = ldb_module_get_ctx(module);
1779
1780 /* make sure that "objectSid" is not specified */
1781 el = ldb_msg_find_element(req->op.mod.message, "objectSid");
1782 if (el != NULL) {
1783 ldb_set_errstring(ldb,
1784 "samldb: objectSid must not be specified!");
1785 return LDB_ERR_UNWILLING_TO_PERFORM;
1786 }
1787 /* make sure that "sAMAccountType" is not specified */
1788 el = ldb_msg_find_element(req->op.mod.message, "sAMAccountType");
1789 if (el != NULL) {
1790 ldb_set_errstring(ldb,
1791 "samldb: sAMAccountType must not be specified!");
1792 return LDB_ERR_UNWILLING_TO_PERFORM;
1793 }
1794 /* make sure that "isCriticalSystemObject" is not specified */
1795 el = ldb_msg_find_element(req->op.mod.message, "isCriticalSystemObject");
1796 if (el != NULL) {
1797 if (ldb_request_get_control(req, LDB_CONTROL_RELAX_OID) == NULL) {
1798 ldb_set_errstring(ldb,
1799 "samldb: isCriticalSystemObject must not be specified!");
1800 return LDB_ERR_UNWILLING_TO_PERFORM;
1801 }
1802 }
1803
1804 /* msDS-IntId is not allowed to be modified
1805 * except when modification comes from replication */
1806 if (ldb_msg_find_element(req->op.mod.message, "msDS-IntId")) {
1807 if (!ldb_request_get_control(req,
1808 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
1809 return LDB_ERR_CONSTRAINT_VIOLATION;
1810 }
1811 }
1812
1813 ac = samldb_ctx_init(module, req);
1814 if (ac == NULL) {
1815 return ldb_operr(ldb);
1816 }
1817
1818 /* build the new msg */
1819 ac->msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
1820 if (ac->msg == NULL) {
1821 talloc_free(ac);
1822 ldb_debug(ldb, LDB_DEBUG_FATAL,
1823 "samldb_modify: ldb_msg_copy_shallow failed!\n");
1824 return ldb_operr(ldb);
1825 }
1826
1827 el = ldb_msg_find_element(ac->msg, "primaryGroupID");
1828 if (el != NULL) {
1829 ret = samldb_prim_group_change(ac);
1830 if (ret != LDB_SUCCESS) {
1831 return ret;
1832 }
1833 }
1834
1835 el = ldb_msg_find_element(ac->msg, "userAccountControl");
1836 if (el != NULL) {
1837 modified = true;
1838 ret = samldb_user_account_control_change(ac);
1839 if (ret != LDB_SUCCESS) {
1840 return ret;
1841 }
1842 }
1843
1844 el = ldb_msg_find_element(ac->msg, "groupType");
1845 if (el != NULL) {
1846 modified = true;
1847 ret = samldb_group_type_change(ac);
1848 if (ret != LDB_SUCCESS) {
1849 return ret;
1850 }
1851 }
1852
1853 el = ldb_msg_find_element(ac->msg, "sAMAccountName");
1854 if (el != NULL) {
1855 ret = samldb_sam_accountname_check(ac);
1856 if (ret != LDB_SUCCESS) {
1857 return ret;
1858 }
1859 }
1860
1861 el = ldb_msg_find_element(ac->msg, "member");
1862 if (el != NULL) {
1863 ret = samldb_member_check(ac);
1864 if (ret != LDB_SUCCESS) {
1865 return ret;
1866 }
1867 }
1868
1869 el = ldb_msg_find_element(ac->msg, "dNSHostName");
1870 el2 = ldb_msg_find_element(ac->msg, "sAMAccountName");
1871 if ((el != NULL) || (el2 != NULL)) {
1872 modified = true;
1873 ret = samldb_service_principal_names_change(ac);
1874 if (ret != LDB_SUCCESS) {
1875 return ret;
1876 }
1877 }
1878
1879 if (modified) {
1880 struct ldb_request *child_req;
1881
1882 /* Now perform the real modifications as a child request */
1883 ret = ldb_build_mod_req(&child_req, ldb, ac,
1884 ac->msg,
1885 req->controls,
1886 req, dsdb_next_callback,
1887 req);
1888 LDB_REQ_SET_LOCATION(child_req);
1889 if (ret != LDB_SUCCESS) {
1890 return ret;
1891 }
1892
1893 return ldb_next_request(module, child_req);
1894 }
1895
1896 talloc_free(ac);
1897
1898 /* no change which interests us, go on */
1899 return ldb_next_request(module, req);
1900 }
1901
1902 /* delete */
1903
1904 static int samldb_prim_group_users_check(struct samldb_ctx *ac)
1905 {
1906 struct ldb_context *ldb;
1907 struct dom_sid *sid;
1908 uint32_t rid;
1909 NTSTATUS status;
1910 int count;
1911
1912 ldb = ldb_module_get_ctx(ac->module);
1913
1914 /* Finds out the SID/RID of the SAM object */
1915 sid = samdb_search_dom_sid(ldb, ac, ac->req->op.del.dn, "objectSid",
1916 NULL);
1917 if (sid == NULL) {
1918 /* No SID - it might not be a SAM object - therefore ok */
1919 return LDB_SUCCESS;
1920 }
1921 status = dom_sid_split_rid(ac, sid, NULL, &rid);
1922 if (!NT_STATUS_IS_OK(status)) {
1923 return ldb_operr(ldb);
1924 }
1925 if (rid == 0) {
1926 /* Special object (security principal?) */
1927 return LDB_SUCCESS;
1928 }
1929
1930 /* Deny delete requests from groups which are primary ones */
1931 count = samdb_search_count(ldb, ac, NULL,
1932 "(&(primaryGroupID=%u)(objectClass=user))",
1933 rid);
1934 if (count < 0) {
1935 return ldb_operr(ldb);
1936 }
1937 if (count > 0) {
1938 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1939 }
1940
1941 return LDB_SUCCESS;
1942 }
1943
1944 static int samldb_delete(struct ldb_module *module, struct ldb_request *req)
1945 {
1946 struct samldb_ctx *ac;
1947 int ret;
1948
1949 if (ldb_dn_is_special(req->op.del.dn)) {
1950 /* do not manipulate our control entries */
1951 return ldb_next_request(module, req);
1952 }
1953
1954 ac = samldb_ctx_init(module, req);
1955 if (ac == NULL) {
1956 return ldb_operr(ldb_module_get_ctx(module));
1957 }
1958
1959 ret = samldb_prim_group_users_check(ac);
1960 if (ret != LDB_SUCCESS) {
1961 return ret;
1962 }
1963
1964 talloc_free(ac);
1965
1966 return ldb_next_request(module, req);
1967 }
1968
1969 /* extended */
1970
1971 static int samldb_extended_allocate_rid_pool(struct ldb_module *module, struct ldb_request *req)
1972 {
1973 struct ldb_context *ldb = ldb_module_get_ctx(module);
1974 struct dsdb_fsmo_extended_op *exop;
1975 int ret;
1976
1977 exop = talloc_get_type(req->op.extended.data,
1978 struct dsdb_fsmo_extended_op);
1979 if (!exop) {
1980 ldb_set_errstring(ldb,
1981 "samldb_extended_allocate_rid_pool: invalid extended data");
1982 return LDB_ERR_PROTOCOL_ERROR;
1983 }
1984
1985 ret = ridalloc_allocate_rid_pool_fsmo(module, exop);
1986 if (ret != LDB_SUCCESS) {
1987 return ret;
1988 }
1989
1990 return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
1991 }
1992
1993 static int samldb_extended(struct ldb_module *module, struct ldb_request *req)
1994 {
1995 if (strcmp(req->op.extended.oid, DSDB_EXTENDED_ALLOCATE_RID_POOL) == 0) {
1996 return samldb_extended_allocate_rid_pool(module, req);
1997 }
1998
1999 return ldb_next_request(module, req);
2000 }
2001
2002
2003 static const struct ldb_module_ops ldb_samldb_module_ops = {
2004 .name = "samldb",
2005 .add = samldb_add,
2006 .modify = samldb_modify,
2007 .del = samldb_delete,
2008 .extended = samldb_extended
2009 };
2010
2011
2012 int ldb_samldb_module_init(const char *version)
2013 {
2014 LDB_MODULE_CHECK_VERSION(version);
2015 return ldb_register_module(&ldb_samldb_module_ops);
2016 }
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