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dsdb: Improve userAccountControl handling
[Samba.git] / source4 / dsdb / samdb / ldb_modules / samldb.c
blob36be6ad0b5257a50a190aeb5795b99761f98c946
1 /*
2 SAM ldb module
3
4 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2014
5 Copyright (C) Simo Sorce 2004-2008
6 Copyright (C) Matthias Dieter Wallnöfer 2009-2011
7 Copyright (C) Matthieu Patou 2012
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 /*
24 * Name: ldb
25 *
26 * Component: ldb samldb module
27 *
28 * Description: various internal DSDB triggers - most for SAM specific objects
29 *
30 * Author: Simo Sorce
31 */
32
33 #include "includes.h"
34 #include "libcli/ldap/ldap_ndr.h"
35 #include "ldb_module.h"
36 #include "auth/auth.h"
37 #include "dsdb/samdb/samdb.h"
38 #include "dsdb/samdb/ldb_modules/util.h"
39 #include "dsdb/samdb/ldb_modules/ridalloc.h"
40 #include "libcli/security/security.h"
41 #include "librpc/gen_ndr/ndr_security.h"
42 #include "ldb_wrap.h"
43 #include "param/param.h"
44 #include "libds/common/flag_mapping.h"
45
46 struct samldb_ctx;
47 enum samldb_add_type {
48 SAMLDB_TYPE_USER,
49 SAMLDB_TYPE_GROUP,
50 SAMLDB_TYPE_CLASS,
51 SAMLDB_TYPE_ATTRIBUTE
52 };
53
54 typedef int (*samldb_step_fn_t)(struct samldb_ctx *);
55
56 struct samldb_step {
57 struct samldb_step *next;
58 samldb_step_fn_t fn;
59 };
60
61 struct samldb_ctx {
62 struct ldb_module *module;
63 struct ldb_request *req;
64
65 /* used for add operations */
66 enum samldb_add_type type;
67
68 /* the resulting message */
69 struct ldb_message *msg;
70
71 /* used in "samldb_find_for_defaultObjectCategory" */
72 struct ldb_dn *dn, *res_dn;
73
74 /* all the async steps necessary to complete the operation */
75 struct samldb_step *steps;
76 struct samldb_step *curstep;
77
78 /* If someone set an ares to forward controls and response back to the caller */
79 struct ldb_reply *ares;
80 };
81
82 static struct samldb_ctx *samldb_ctx_init(struct ldb_module *module,
83 struct ldb_request *req)
84 {
85 struct ldb_context *ldb;
86 struct samldb_ctx *ac;
87
88 ldb = ldb_module_get_ctx(module);
89
90 ac = talloc_zero(req, struct samldb_ctx);
91 if (ac == NULL) {
92 ldb_oom(ldb);
93 return NULL;
94 }
95
96 ac->module = module;
97 ac->req = req;
98
99 return ac;
100 }
101
102 static int samldb_add_step(struct samldb_ctx *ac, samldb_step_fn_t fn)
103 {
104 struct samldb_step *step, *stepper;
105
106 step = talloc_zero(ac, struct samldb_step);
107 if (step == NULL) {
108 return ldb_oom(ldb_module_get_ctx(ac->module));
109 }
110
111 step->fn = fn;
112
113 if (ac->steps == NULL) {
114 ac->steps = step;
115 ac->curstep = step;
116 } else {
117 if (ac->curstep == NULL)
118 return ldb_operr(ldb_module_get_ctx(ac->module));
119 for (stepper = ac->curstep; stepper->next != NULL;
120 stepper = stepper->next);
121 stepper->next = step;
122 }
123
124 return LDB_SUCCESS;
125 }
126
127 static int samldb_first_step(struct samldb_ctx *ac)
128 {
129 if (ac->steps == NULL) {
130 return ldb_operr(ldb_module_get_ctx(ac->module));
131 }
132
133 ac->curstep = ac->steps;
134 return ac->curstep->fn(ac);
135 }
136
137 static int samldb_next_step(struct samldb_ctx *ac)
138 {
139 if (ac->curstep->next) {
140 ac->curstep = ac->curstep->next;
141 return ac->curstep->fn(ac);
142 }
143
144 /* We exit the samldb module here. If someone set an "ares" to forward
145 * controls and response back to the caller, use them. */
146 if (ac->ares) {
147 return ldb_module_done(ac->req, ac->ares->controls,
148 ac->ares->response, LDB_SUCCESS);
149 } else {
150 return ldb_module_done(ac->req, NULL, NULL, LDB_SUCCESS);
151 }
152 }
153
154
155 /* sAMAccountName handling */
156
157 static int samldb_generate_sAMAccountName(struct ldb_context *ldb,
158 struct ldb_message *msg)
159 {
160 char *name;
161
162 /* Format: $000000-000000000000 */
163
164 name = talloc_asprintf(msg, "$%.6X-%.6X%.6X",
165 (unsigned int)generate_random(),
166 (unsigned int)generate_random(),
167 (unsigned int)generate_random());
168 if (name == NULL) {
169 return ldb_oom(ldb);
170 }
171 return ldb_msg_add_steal_string(msg, "sAMAccountName", name);
172 }
173
174 static int samldb_check_sAMAccountName(struct samldb_ctx *ac)
175 {
176 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
177 const char *name;
178 int ret;
179 struct ldb_result *res;
180 const char * const noattrs[] = { NULL };
181
182 if (ldb_msg_find_element(ac->msg, "sAMAccountName") == NULL) {
183 ret = samldb_generate_sAMAccountName(ldb, ac->msg);
184 if (ret != LDB_SUCCESS) {
185 return ret;
186 }
187 }
188
189 name = ldb_msg_find_attr_as_string(ac->msg, "sAMAccountName", NULL);
190 if (name == NULL) {
191 /* The "sAMAccountName" cannot be nothing */
192 ldb_set_errstring(ldb,
193 "samldb: Empty account names aren't allowed!");
194 return LDB_ERR_CONSTRAINT_VIOLATION;
195 }
196
197 ret = dsdb_module_search(ac->module, ac, &res,
198 ldb_get_default_basedn(ldb), LDB_SCOPE_SUBTREE, noattrs,
199 DSDB_FLAG_NEXT_MODULE,
200 ac->req,
201 "(sAMAccountName=%s)",
202 ldb_binary_encode_string(ac, name));
203 if (ret != LDB_SUCCESS) {
204 return ret;
205 }
206 if (res->count != 0) {
207 ldb_asprintf_errstring(ldb,
208 "samldb: Account name (sAMAccountName) '%s' already in use!",
209 name);
210 talloc_free(res);
211 return LDB_ERR_ENTRY_ALREADY_EXISTS;
212 }
213 talloc_free(res);
214
215 return samldb_next_step(ac);
216 }
217
218
219 static bool samldb_msg_add_sid(struct ldb_message *msg,
220 const char *name,
221 const struct dom_sid *sid)
222 {
223 struct ldb_val v;
224 enum ndr_err_code ndr_err;
225
226 ndr_err = ndr_push_struct_blob(&v, msg, sid,
227 (ndr_push_flags_fn_t)ndr_push_dom_sid);
228 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
229 return false;
230 }
231 return (ldb_msg_add_value(msg, name, &v, NULL) == 0);
232 }
233
234
235 /* allocate a SID using our RID Set */
236 static int samldb_allocate_sid(struct samldb_ctx *ac)
237 {
238 uint32_t rid;
239 struct dom_sid *sid;
240 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
241 int ret;
242
243 ret = ridalloc_allocate_rid(ac->module, &rid, ac->req);
244 if (ret != LDB_SUCCESS) {
245 return ret;
246 }
247
248 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
249 if (sid == NULL) {
250 return ldb_module_oom(ac->module);
251 }
252
253 if ( ! samldb_msg_add_sid(ac->msg, "objectSid", sid)) {
254 return ldb_operr(ldb);
255 }
256
257 return samldb_next_step(ac);
258 }
259
260 /*
261 see if a krbtgt_number is available
262 */
263 static bool samldb_krbtgtnumber_available(struct samldb_ctx *ac,
264 uint32_t krbtgt_number)
265 {
266 TALLOC_CTX *tmp_ctx = talloc_new(ac);
267 struct ldb_result *res;
268 const char * const no_attrs[] = { NULL };
269 int ret;
270
271 ret = dsdb_module_search(ac->module, tmp_ctx, &res,
272 ldb_get_default_basedn(ldb_module_get_ctx(ac->module)),
273 LDB_SCOPE_SUBTREE, no_attrs,
274 DSDB_FLAG_NEXT_MODULE,
275 ac->req,
276 "(msDC-SecondaryKrbTgtNumber=%u)",
277 krbtgt_number);
278 if (ret == LDB_SUCCESS && res->count == 0) {
279 talloc_free(tmp_ctx);
280 return true;
281 }
282 talloc_free(tmp_ctx);
283 return false;
284 }
285
286 /* special handling for add in RODC join */
287 static int samldb_rodc_add(struct samldb_ctx *ac)
288 {
289 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
290 uint32_t krbtgt_number, i_start, i;
291 int ret;
292 char *newpass;
293 struct ldb_val newpass_utf16;
294
295 /* find a unused msDC-SecondaryKrbTgtNumber */
296 i_start = generate_random() & 0xFFFF;
297 if (i_start == 0) {
298 i_start = 1;
299 }
300
301 for (i=i_start; i<=0xFFFF; i++) {
302 if (samldb_krbtgtnumber_available(ac, i)) {
303 krbtgt_number = i;
304 goto found;
305 }
306 }
307 for (i=1; i<i_start; i++) {
308 if (samldb_krbtgtnumber_available(ac, i)) {
309 krbtgt_number = i;
310 goto found;
311 }
312 }
313
314 ldb_asprintf_errstring(ldb,
315 "%08X: Unable to find available msDS-SecondaryKrbTgtNumber",
316 W_ERROR_V(WERR_NO_SYSTEM_RESOURCES));
317 return LDB_ERR_OTHER;
318
319 found:
320 ret = ldb_msg_add_empty(ac->msg, "msDS-SecondaryKrbTgtNumber",
321 LDB_FLAG_INTERNAL_DISABLE_VALIDATION, NULL);
322 if (ret != LDB_SUCCESS) {
323 return ldb_operr(ldb);
324 }
325
326 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
327 "msDS-SecondaryKrbTgtNumber", krbtgt_number);
328 if (ret != LDB_SUCCESS) {
329 return ldb_operr(ldb);
330 }
331
332 ret = ldb_msg_add_fmt(ac->msg, "sAMAccountName", "krbtgt_%u",
333 krbtgt_number);
334 if (ret != LDB_SUCCESS) {
335 return ldb_operr(ldb);
336 }
337
338 newpass = generate_random_password(ac->msg, 128, 255);
339 if (newpass == NULL) {
340 return ldb_operr(ldb);
341 }
342
343 if (!convert_string_talloc(ac,
344 CH_UNIX, CH_UTF16,
345 newpass, strlen(newpass),
346 (void *)&newpass_utf16.data,
347 &newpass_utf16.length)) {
348 ldb_asprintf_errstring(ldb,
349 "samldb_rodc_add: "
350 "failed to generate UTF16 password from random password");
351 return LDB_ERR_OPERATIONS_ERROR;
352 }
353 ret = ldb_msg_add_steal_value(ac->msg, "clearTextPassword", &newpass_utf16);
354 if (ret != LDB_SUCCESS) {
355 return ldb_operr(ldb);
356 }
357
358 return samldb_next_step(ac);
359 }
360
361 static int samldb_find_for_defaultObjectCategory(struct samldb_ctx *ac)
362 {
363 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
364 struct ldb_result *res;
365 const char * const no_attrs[] = { NULL };
366 int ret;
367
368 ac->res_dn = NULL;
369
370 ret = dsdb_module_search(ac->module, ac, &res,
371 ac->dn, LDB_SCOPE_BASE, no_attrs,
372 DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT
373 | DSDB_FLAG_NEXT_MODULE,
374 ac->req,
375 "(objectClass=classSchema)");
376 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
377 /* Don't be pricky when the DN doesn't exist if we have the */
378 /* RELAX control specified */
379 if (ldb_request_get_control(ac->req,
380 LDB_CONTROL_RELAX_OID) == NULL) {
381 ldb_set_errstring(ldb,
382 "samldb_find_defaultObjectCategory: "
383 "Invalid DN for 'defaultObjectCategory'!");
384 return LDB_ERR_CONSTRAINT_VIOLATION;
385 }
386 }
387 if ((ret != LDB_ERR_NO_SUCH_OBJECT) && (ret != LDB_SUCCESS)) {
388 return ret;
389 }
390
391 if (ret == LDB_SUCCESS) {
392 /* ensure the defaultObjectCategory has a full GUID */
393 struct ldb_message *m;
394 m = ldb_msg_new(ac->msg);
395 if (m == NULL) {
396 return ldb_oom(ldb);
397 }
398 m->dn = ac->msg->dn;
399 if (ldb_msg_add_string(m, "defaultObjectCategory",
400 ldb_dn_get_extended_linearized(m, res->msgs[0]->dn, 1)) !=
401 LDB_SUCCESS) {
402 return ldb_oom(ldb);
403 }
404 m->elements[0].flags = LDB_FLAG_MOD_REPLACE;
405
406 ret = dsdb_module_modify(ac->module, m,
407 DSDB_FLAG_NEXT_MODULE,
408 ac->req);
409 if (ret != LDB_SUCCESS) {
410 return ret;
411 }
412 }
413
414
415 ac->res_dn = ac->dn;
416
417 return samldb_next_step(ac);
418 }
419
420 /**
421 * msDS-IntId attributeSchema attribute handling
422 * during LDB_ADD request processing
423 */
424 static int samldb_add_handle_msDS_IntId(struct samldb_ctx *ac)
425 {
426 int ret;
427 bool id_exists;
428 uint32_t msds_intid;
429 int32_t system_flags;
430 struct ldb_context *ldb;
431 struct ldb_result *ldb_res;
432 struct ldb_dn *schema_dn;
433 struct samldb_msds_intid_persistant *msds_intid_struct;
434 struct dsdb_schema *schema;
435
436 ldb = ldb_module_get_ctx(ac->module);
437 schema_dn = ldb_get_schema_basedn(ldb);
438
439 /* replicated update should always go through */
440 if (ldb_request_get_control(ac->req,
441 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
442 return LDB_SUCCESS;
443 }
444
445 /* msDS-IntId is handled by system and should never be
446 * passed by clients */
447 if (ldb_msg_find_element(ac->msg, "msDS-IntId")) {
448 return LDB_ERR_UNWILLING_TO_PERFORM;
449 }
450
451 /* do not generate msDS-IntId if Relax control is passed */
452 if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
453 return LDB_SUCCESS;
454 }
455
456 /* check Functional Level */
457 if (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003) {
458 return LDB_SUCCESS;
459 }
460
461 /* check systemFlags for SCHEMA_BASE_OBJECT flag */
462 system_flags = ldb_msg_find_attr_as_int(ac->msg, "systemFlags", 0);
463 if (system_flags & SYSTEM_FLAG_SCHEMA_BASE_OBJECT) {
464 return LDB_SUCCESS;
465 }
466 schema = dsdb_get_schema(ldb, NULL);
467 if (!schema) {
468 ldb_debug_set(ldb, LDB_DEBUG_FATAL,
469 "samldb_schema_info_update: no dsdb_schema loaded");
470 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
471 return ldb_operr(ldb);
472 }
473
474 msds_intid_struct = (struct samldb_msds_intid_persistant*) ldb_get_opaque(ldb, SAMLDB_MSDS_INTID_OPAQUE);
475 if (!msds_intid_struct) {
476 msds_intid_struct = talloc(ldb, struct samldb_msds_intid_persistant);
477 /* Generate new value for msDs-IntId
478 * Value should be in 0x80000000..0xBFFFFFFF range */
479 msds_intid = generate_random() % 0X3FFFFFFF;
480 msds_intid += 0x80000000;
481 msds_intid_struct->msds_intid = msds_intid;
482 msds_intid_struct->usn = schema->loaded_usn;
483 DEBUG(2, ("No samldb_msds_intid_persistant struct, allocating a new one\n"));
484 } else {
485 msds_intid = msds_intid_struct->msds_intid;
486 }
487
488 /* probe id values until unique one is found */
489 do {
490 uint64_t current_usn;
491 msds_intid++;
492 if (msds_intid > 0xBFFFFFFF) {
493 msds_intid = 0x80000001;
494 }
495 /*
496 * Alternative strategy to a costly (even indexed search) to the
497 * database.
498 * We search in the schema if we have already this intid (using dsdb_attribute_by_attributeID_id because
499 * in the range 0x80000000 0xBFFFFFFFF, attributeID is a DSDB_ATTID_TYPE_INTID).
500 * If so generate another random value.
501 * If not check if the highest USN in the database for the schema partition is the
502 * one that we know.
503 * If so it means that's only this ldb context that is touching the schema in the database.
504 * If not it means that's someone else has modified the database while we are doing our changes too
505 * (this case should be very bery rare) in order to be sure do the search in the database.
506 */
507 if (dsdb_attribute_by_attributeID_id(schema, msds_intid)) {
508 msds_intid = generate_random() % 0X3FFFFFFF;
509 msds_intid += 0x80000000;
510 continue;
511 }
512
513 ret = dsdb_module_load_partition_usn(ac->module, schema_dn,
514 &current_usn, NULL, NULL);
515 if (ret != LDB_SUCCESS) {
516 ldb_debug_set(ldb, LDB_DEBUG_ERROR,
517 __location__": Searching for schema USN failed: %s\n",
518 ldb_errstring(ldb));
519 return ldb_operr(ldb);
520 }
521
522 /* current_usn can be lesser than msds_intid_struct-> if there is
523 * uncommited changes.
524 */
525 if (current_usn > msds_intid_struct->usn) {
526 /* oups something has changed, someone/something
527 * else is modifying or has modified the schema
528 * we'd better check this intid is the database directly
529 */
530
531 DEBUG(2, ("Schema has changed, searching the database for the unicity of %d\n",
532 msds_intid));
533
534 ret = dsdb_module_search(ac->module, ac,
535 &ldb_res,
536 schema_dn, LDB_SCOPE_ONELEVEL, NULL,
537 DSDB_FLAG_NEXT_MODULE,
538 ac->req,
539 "(msDS-IntId=%d)", msds_intid);
540 if (ret != LDB_SUCCESS) {
541 ldb_debug_set(ldb, LDB_DEBUG_ERROR,
542 __location__": Searching for msDS-IntId=%d failed - %s\n",
543 msds_intid,
544 ldb_errstring(ldb));
545 return ldb_operr(ldb);
546 }
547 id_exists = (ldb_res->count > 0);
548 talloc_free(ldb_res);
549 } else {
550 id_exists = 0;
551 }
552
553 } while(id_exists);
554 msds_intid_struct->msds_intid = msds_intid;
555 ldb_set_opaque(ldb, SAMLDB_MSDS_INTID_OPAQUE, msds_intid_struct);
556
557 return samdb_msg_add_int(ldb, ac->msg, ac->msg, "msDS-IntId",
558 msds_intid);
559 }
560
561
562 /*
563 * samldb_add_entry (async)
564 */
565
566 static int samldb_add_entry_callback(struct ldb_request *req,
567 struct ldb_reply *ares)
568 {
569 struct ldb_context *ldb;
570 struct samldb_ctx *ac;
571 int ret;
572
573 ac = talloc_get_type(req->context, struct samldb_ctx);
574 ldb = ldb_module_get_ctx(ac->module);
575
576 if (!ares) {
577 return ldb_module_done(ac->req, NULL, NULL,
578 LDB_ERR_OPERATIONS_ERROR);
579 }
580
581 if (ares->type == LDB_REPLY_REFERRAL) {
582 return ldb_module_send_referral(ac->req, ares->referral);
583 }
584
585 if (ares->error != LDB_SUCCESS) {
586 return ldb_module_done(ac->req, ares->controls,
587 ares->response, ares->error);
588 }
589 if (ares->type != LDB_REPLY_DONE) {
590 ldb_asprintf_errstring(ldb, "Invalid LDB reply type %d", ares->type);
591 return ldb_module_done(ac->req, NULL, NULL,
592 LDB_ERR_OPERATIONS_ERROR);
593 }
594
595 /* The caller may wish to get controls back from the add */
596 ac->ares = talloc_steal(ac, ares);
597
598 ret = samldb_next_step(ac);
599 if (ret != LDB_SUCCESS) {
600 return ldb_module_done(ac->req, NULL, NULL, ret);
601 }
602 return ret;
603 }
604
605 static int samldb_add_entry(struct samldb_ctx *ac)
606 {
607 struct ldb_context *ldb;
608 struct ldb_request *req;
609 int ret;
610
611 ldb = ldb_module_get_ctx(ac->module);
612
613 ret = ldb_build_add_req(&req, ldb, ac,
614 ac->msg,
615 ac->req->controls,
616 ac, samldb_add_entry_callback,
617 ac->req);
618 LDB_REQ_SET_LOCATION(req);
619 if (ret != LDB_SUCCESS) {
620 return ret;
621 }
622
623 return ldb_next_request(ac->module, req);
624 }
625
626 /*
627 * return true if msg carries an attributeSchema that is intended to be RODC
628 * filtered but is also a system-critical attribute.
629 */
630 static bool check_rodc_critical_attribute(struct ldb_message *msg)
631 {
632 uint32_t schemaFlagsEx, searchFlags, rodc_filtered_flags;
633
634 schemaFlagsEx = ldb_msg_find_attr_as_uint(msg, "schemaFlagsEx", 0);
635 searchFlags = ldb_msg_find_attr_as_uint(msg, "searchFlags", 0);
636 rodc_filtered_flags = (SEARCH_FLAG_RODC_ATTRIBUTE
637 | SEARCH_FLAG_CONFIDENTIAL);
638
639 if ((schemaFlagsEx & SCHEMA_FLAG_ATTR_IS_CRITICAL) &&
640 ((searchFlags & rodc_filtered_flags) == rodc_filtered_flags)) {
641 return true;
642 } else {
643 return false;
644 }
645 }
646
647
648 static int samldb_fill_object(struct samldb_ctx *ac)
649 {
650 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
651 int ret;
652
653 /* Add information for the different account types */
654 switch(ac->type) {
655 case SAMLDB_TYPE_USER: {
656 struct ldb_control *rodc_control = ldb_request_get_control(ac->req,
657 LDB_CONTROL_RODC_DCPROMO_OID);
658 if (rodc_control != NULL) {
659 /* see [MS-ADTS] 3.1.1.3.4.1.23 LDAP_SERVER_RODC_DCPROMO_OID */
660 rodc_control->critical = false;
661 ret = samldb_add_step(ac, samldb_rodc_add);
662 if (ret != LDB_SUCCESS) return ret;
663 }
664
665 /* check if we have a valid sAMAccountName */
666 ret = samldb_add_step(ac, samldb_check_sAMAccountName);
667 if (ret != LDB_SUCCESS) return ret;
668
669 ret = samldb_add_step(ac, samldb_add_entry);
670 if (ret != LDB_SUCCESS) return ret;
671 break;
672 }
673
674 case SAMLDB_TYPE_GROUP: {
675 /* check if we have a valid sAMAccountName */
676 ret = samldb_add_step(ac, samldb_check_sAMAccountName);
677 if (ret != LDB_SUCCESS) return ret;
678
679 ret = samldb_add_step(ac, samldb_add_entry);
680 if (ret != LDB_SUCCESS) return ret;
681 break;
682 }
683
684 case SAMLDB_TYPE_CLASS: {
685 const struct ldb_val *rdn_value, *def_obj_cat_val;
686 unsigned int v = ldb_msg_find_attr_as_uint(ac->msg, "objectClassCategory", -2);
687
688 /* As discussed with Microsoft through dochelp in April 2012 this is the behavior of windows*/
689 if (!ldb_msg_find_element(ac->msg, "subClassOf")) {
690 ret = ldb_msg_add_string(ac->msg, "subClassOf", "top");
691 if (ret != LDB_SUCCESS) return ret;
692 }
693
694 ret = samdb_find_or_add_attribute(ldb, ac->msg,
695 "rdnAttId", "cn");
696 if (ret != LDB_SUCCESS) return ret;
697
698 /* do not allow to mark an attributeSchema as RODC filtered if it
699 * is system-critical */
700 if (check_rodc_critical_attribute(ac->msg)) {
701 ldb_asprintf_errstring(ldb, "Refusing schema add of %s - cannot combine critical class with RODC filtering",
702 ldb_dn_get_linearized(ac->msg->dn));
703 return LDB_ERR_UNWILLING_TO_PERFORM;
704 }
705
706 rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
707 if (rdn_value == NULL) {
708 return ldb_operr(ldb);
709 }
710 if (!ldb_msg_find_element(ac->msg, "lDAPDisplayName")) {
711 /* the RDN has prefix "CN" */
712 ret = ldb_msg_add_string(ac->msg, "lDAPDisplayName",
713 samdb_cn_to_lDAPDisplayName(ac->msg,
714 (const char *) rdn_value->data));
715 if (ret != LDB_SUCCESS) {
716 ldb_oom(ldb);
717 return ret;
718 }
719 }
720
721 if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) {
722 struct GUID guid;
723 /* a new GUID */
724 guid = GUID_random();
725 ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID");
726 if (ret != LDB_SUCCESS) {
727 ldb_oom(ldb);
728 return ret;
729 }
730 }
731
732 def_obj_cat_val = ldb_msg_find_ldb_val(ac->msg,
733 "defaultObjectCategory");
734 if (def_obj_cat_val != NULL) {
735 /* "defaultObjectCategory" has been set by the caller.
736 * Do some checks for consistency.
737 * NOTE: The real constraint check (that
738 * 'defaultObjectCategory' is the DN of the new
739 * objectclass or any parent of it) is still incomplete.
740 * For now we say that 'defaultObjectCategory' is valid
741 * if it exists and it is of objectclass "classSchema".
742 */
743 ac->dn = ldb_dn_from_ldb_val(ac, ldb, def_obj_cat_val);
744 if (ac->dn == NULL) {
745 ldb_set_errstring(ldb,
746 "Invalid DN for 'defaultObjectCategory'!");
747 return LDB_ERR_CONSTRAINT_VIOLATION;
748 }
749 } else {
750 /* "defaultObjectCategory" has not been set by the
751 * caller. Use the entry DN for it. */
752 ac->dn = ac->msg->dn;
753
754 ret = ldb_msg_add_string(ac->msg, "defaultObjectCategory",
755 ldb_dn_alloc_linearized(ac->msg, ac->dn));
756 if (ret != LDB_SUCCESS) {
757 ldb_oom(ldb);
758 return ret;
759 }
760 }
761
762 ret = samldb_add_step(ac, samldb_add_entry);
763 if (ret != LDB_SUCCESS) return ret;
764
765 /* Now perform the checks for the 'defaultObjectCategory'. The
766 * lookup DN was already saved in "ac->dn" */
767 ret = samldb_add_step(ac, samldb_find_for_defaultObjectCategory);
768 if (ret != LDB_SUCCESS) return ret;
769
770 /* -2 is not a valid objectClassCategory so it means the attribute wasn't present */
771 if (v == -2) {
772 /* Windows 2003 does this*/
773 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "objectClassCategory", 0);
774 if (ret != LDB_SUCCESS) {
775 return ret;
776 }
777 }
778 break;
779 }
780
781 case SAMLDB_TYPE_ATTRIBUTE: {
782 const struct ldb_val *rdn_value;
783 struct ldb_message_element *el;
784 rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
785 if (rdn_value == NULL) {
786 return ldb_operr(ldb);
787 }
788 if (!ldb_msg_find_element(ac->msg, "lDAPDisplayName")) {
789 /* the RDN has prefix "CN" */
790 ret = ldb_msg_add_string(ac->msg, "lDAPDisplayName",
791 samdb_cn_to_lDAPDisplayName(ac->msg,
792 (const char *) rdn_value->data));
793 if (ret != LDB_SUCCESS) {
794 ldb_oom(ldb);
795 return ret;
796 }
797 }
798
799 /* do not allow to mark an attributeSchema as RODC filtered if it
800 * is system-critical */
801 if (check_rodc_critical_attribute(ac->msg)) {
802 ldb_asprintf_errstring(ldb,
803 "samldb: refusing schema add of %s - cannot combine critical attribute with RODC filtering",
804 ldb_dn_get_linearized(ac->msg->dn));
805 return LDB_ERR_UNWILLING_TO_PERFORM;
806 }
807
808 ret = samdb_find_or_add_attribute(ldb, ac->msg,
809 "isSingleValued", "FALSE");
810 if (ret != LDB_SUCCESS) return ret;
811
812 if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) {
813 struct GUID guid;
814 /* a new GUID */
815 guid = GUID_random();
816 ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID");
817 if (ret != LDB_SUCCESS) {
818 ldb_oom(ldb);
819 return ret;
820 }
821 }
822
823 el = ldb_msg_find_element(ac->msg, "attributeSyntax");
824 if (el) {
825 /*
826 * No need to scream if there isn't as we have code later on
827 * that will take care of it.
828 */
829 const struct dsdb_syntax *syntax = find_syntax_map_by_ad_oid((const char *)el->values[0].data);
830 if (!syntax) {
831 DEBUG(9, ("Can't find dsdb_syntax object for attributeSyntax %s\n",
832 (const char *)el->values[0].data));
833 } else {
834 unsigned int v = ldb_msg_find_attr_as_uint(ac->msg, "oMSyntax", 0);
835 const struct ldb_val *val = ldb_msg_find_ldb_val(ac->msg, "oMObjectClass");
836
837 if (v == 0) {
838 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "oMSyntax", syntax->oMSyntax);
839 if (ret != LDB_SUCCESS) {
840 return ret;
841 }
842 }
843 if (!val) {
844 struct ldb_val val2 = ldb_val_dup(ldb, &syntax->oMObjectClass);
845 if (val2.length > 0) {
846 ret = ldb_msg_add_value(ac->msg, "oMObjectClass", &val2, NULL);
847 if (ret != LDB_SUCCESS) {
848 return ret;
849 }
850 }
851 }
852 }
853 }
854
855 /* handle msDS-IntID attribute */
856 ret = samldb_add_handle_msDS_IntId(ac);
857 if (ret != LDB_SUCCESS) return ret;
858
859 ret = samldb_add_step(ac, samldb_add_entry);
860 if (ret != LDB_SUCCESS) return ret;
861 break;
862 }
863
864 default:
865 ldb_asprintf_errstring(ldb, "Invalid entry type!");
866 return LDB_ERR_OPERATIONS_ERROR;
867 break;
868 }
869
870 return samldb_first_step(ac);
871 }
872
873 static int samldb_fill_foreignSecurityPrincipal_object(struct samldb_ctx *ac)
874 {
875 struct ldb_context *ldb;
876 const struct ldb_val *rdn_value;
877 struct dom_sid *sid;
878 int ret;
879
880 ldb = ldb_module_get_ctx(ac->module);
881
882 sid = samdb_result_dom_sid(ac->msg, ac->msg, "objectSid");
883 if (sid == NULL) {
884 rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
885 if (rdn_value == NULL) {
886 return ldb_operr(ldb);
887 }
888 sid = dom_sid_parse_talloc(ac->msg,
889 (const char *)rdn_value->data);
890 if (sid == NULL) {
891 ldb_set_errstring(ldb,
892 "samldb: No valid SID found in ForeignSecurityPrincipal CN!");
893 return LDB_ERR_CONSTRAINT_VIOLATION;
894 }
895 if (! samldb_msg_add_sid(ac->msg, "objectSid", sid)) {
896 return ldb_operr(ldb);
897 }
898 }
899
900 /* finally proceed with adding the entry */
901 ret = samldb_add_step(ac, samldb_add_entry);
902 if (ret != LDB_SUCCESS) return ret;
903
904 return samldb_first_step(ac);
905 }
906
907 static int samldb_schema_info_update(struct samldb_ctx *ac)
908 {
909 int ret;
910 struct ldb_context *ldb;
911 struct dsdb_schema *schema;
912
913 /* replicated update should always go through */
914 if (ldb_request_get_control(ac->req,
915 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
916 return LDB_SUCCESS;
917 }
918
919 /* do not update schemaInfo during provisioning */
920 if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
921 return LDB_SUCCESS;
922 }
923
924 ldb = ldb_module_get_ctx(ac->module);
925 schema = dsdb_get_schema(ldb, NULL);
926 if (!schema) {
927 ldb_debug_set(ldb, LDB_DEBUG_FATAL,
928 "samldb_schema_info_update: no dsdb_schema loaded");
929 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
930 return ldb_operr(ldb);
931 }
932
933 ret = dsdb_module_schema_info_update(ac->module, schema,
934 DSDB_FLAG_NEXT_MODULE|
935 DSDB_FLAG_AS_SYSTEM,
936 ac->req);
937 if (ret != LDB_SUCCESS) {
938 ldb_asprintf_errstring(ldb,
939 "samldb_schema_info_update: dsdb_module_schema_info_update failed with %s",
940 ldb_errstring(ldb));
941 return ret;
942 }
943
944 return LDB_SUCCESS;
945 }
946
947 static int samldb_prim_group_tester(struct samldb_ctx *ac, uint32_t rid);
948 static int samldb_check_user_account_control_rules(struct samldb_ctx *ac,
949 struct dom_sid *sid,
950 uint32_t user_account_control,
951 uint32_t user_account_control_old);
952
953 /*
954 * "Objectclass" trigger (MS-SAMR 3.1.1.8.1)
955 *
956 * Has to be invoked on "add" and "modify" operations on "user", "computer" and
957 * "group" objects.
958 * ac->msg contains the "add"/"modify" message
959 * ac->type contains the object type (main objectclass)
960 */
961 static int samldb_objectclass_trigger(struct samldb_ctx *ac)
962 {
963 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
964 void *skip_allocate_sids = ldb_get_opaque(ldb,
965 "skip_allocate_sids");
966 struct ldb_message_element *el, *el2;
967 struct dom_sid *sid;
968 int ret;
969
970 /* make sure that "sAMAccountType" is not specified */
971 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
972 if (el != NULL) {
973 ldb_set_errstring(ldb,
974 "samldb: sAMAccountType must not be specified!");
975 return LDB_ERR_UNWILLING_TO_PERFORM;
976 }
977
978 /* Step 1: objectSid assignment */
979
980 /* Don't allow the objectSid to be changed. But beside the RELAX
981 * control we have also to guarantee that it can always be set with
982 * SYSTEM permissions. This is needed for the "samba3sam" backend. */
983 sid = samdb_result_dom_sid(ac, ac->msg, "objectSid");
984 if ((sid != NULL) && (!dsdb_module_am_system(ac->module)) &&
985 (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) == NULL)) {
986 ldb_set_errstring(ldb,
987 "samldb: objectSid must not be specified!");
988 return LDB_ERR_UNWILLING_TO_PERFORM;
989 }
990
991 /* but generate a new SID when we do have an add operations */
992 if ((sid == NULL) && (ac->req->operation == LDB_ADD) && !skip_allocate_sids) {
993 ret = samldb_add_step(ac, samldb_allocate_sid);
994 if (ret != LDB_SUCCESS) return ret;
995 }
996
997 switch(ac->type) {
998 case SAMLDB_TYPE_USER: {
999 bool uac_generated = false, uac_add_flags = false;
1000
1001 /* Step 1.2: Default values */
1002 ret = samdb_find_or_add_attribute(ldb, ac->msg,
1003 "accountExpires", "9223372036854775807");
1004 if (ret != LDB_SUCCESS) return ret;
1005 ret = samdb_find_or_add_attribute(ldb, ac->msg,
1006 "badPasswordTime", "0");
1007 if (ret != LDB_SUCCESS) return ret;
1008 ret = samdb_find_or_add_attribute(ldb, ac->msg,
1009 "badPwdCount", "0");
1010 if (ret != LDB_SUCCESS) return ret;
1011 ret = samdb_find_or_add_attribute(ldb, ac->msg,
1012 "codePage", "0");
1013 if (ret != LDB_SUCCESS) return ret;
1014 ret = samdb_find_or_add_attribute(ldb, ac->msg,
1015 "countryCode", "0");
1016 if (ret != LDB_SUCCESS) return ret;
1017 ret = samdb_find_or_add_attribute(ldb, ac->msg,
1018 "lastLogoff", "0");
1019 if (ret != LDB_SUCCESS) return ret;
1020 ret = samdb_find_or_add_attribute(ldb, ac->msg,
1021 "lastLogon", "0");
1022 if (ret != LDB_SUCCESS) return ret;
1023 ret = samdb_find_or_add_attribute(ldb, ac->msg,
1024 "logonCount", "0");
1025 if (ret != LDB_SUCCESS) return ret;
1026 ret = samdb_find_or_add_attribute(ldb, ac->msg,
1027 "pwdLastSet", "0");
1028 if (ret != LDB_SUCCESS) return ret;
1029
1030 /* On add operations we might need to generate a
1031 * "userAccountControl" (if it isn't specified). */
1032 el = ldb_msg_find_element(ac->msg, "userAccountControl");
1033 if ((el == NULL) && (ac->req->operation == LDB_ADD)) {
1034 ret = samdb_msg_set_uint(ldb, ac->msg, ac->msg,
1035 "userAccountControl",
1036 UF_NORMAL_ACCOUNT);
1037 if (ret != LDB_SUCCESS) {
1038 return ret;
1039 }
1040 uac_generated = true;
1041 uac_add_flags = true;
1042 }
1043
1044 el = ldb_msg_find_element(ac->msg, "userAccountControl");
1045 if (el != NULL) {
1046 uint32_t user_account_control, account_type;
1047 /* Step 1.3: "userAccountControl" -> "sAMAccountType" mapping */
1048 user_account_control = ldb_msg_find_attr_as_uint(ac->msg,
1049 "userAccountControl",
1050 0);
1051 /* "userAccountControl" = 0 or missing one of the types means "UF_NORMAL_ACCOUNT" */
1052 if ((user_account_control & UF_ACCOUNT_TYPE_MASK) == 0) {
1053 user_account_control = UF_NORMAL_ACCOUNT | user_account_control;
1054 uac_generated = true;
1055 }
1056
1057 /*
1058 * As per MS-SAMR 3.1.1.8.10 these flags have not to be set
1059 */
1060 if ((user_account_control & UF_LOCKOUT) != 0) {
1061 user_account_control &= ~UF_LOCKOUT;
1062 uac_generated = true;
1063 }
1064 if ((user_account_control & UF_PASSWORD_EXPIRED) != 0) {
1065 user_account_control &= ~UF_PASSWORD_EXPIRED;
1066 uac_generated = true;
1067 }
1068
1069 ret = samldb_check_user_account_control_rules(ac, NULL,
1070 user_account_control, 0);
1071 if (ret != LDB_SUCCESS) {
1072 return ret;
1073 }
1074
1075 /* Workstation and (read-only) DC objects do need objectclass "computer" */
1076 if ((samdb_find_attribute(ldb, ac->msg,
1077 "objectclass", "computer") == NULL) &&
1078 (user_account_control &
1079 (UF_SERVER_TRUST_ACCOUNT | UF_WORKSTATION_TRUST_ACCOUNT))) {
1080 ldb_set_errstring(ldb,
1081 "samldb: Requested account type does need objectclass 'computer'!");
1082 return LDB_ERR_OBJECT_CLASS_VIOLATION;
1083 }
1084
1085 account_type = ds_uf2atype(user_account_control);
1086 if (account_type == 0) {
1087 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
1088 return LDB_ERR_UNWILLING_TO_PERFORM;
1089 }
1090 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1091 "sAMAccountType",
1092 account_type);
1093 if (ret != LDB_SUCCESS) {
1094 return ret;
1095 }
1096 el2 = ldb_msg_find_element(ac->msg, "sAMAccountType");
1097 el2->flags = LDB_FLAG_MOD_REPLACE;
1098
1099 /* "isCriticalSystemObject" might be set */
1100 if (user_account_control &
1101 (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
1102 ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
1103 "TRUE");
1104 if (ret != LDB_SUCCESS) {
1105 return ret;
1106 }
1107 el2 = ldb_msg_find_element(ac->msg,
1108 "isCriticalSystemObject");
1109 el2->flags = LDB_FLAG_MOD_REPLACE;
1110 } else if (user_account_control & UF_WORKSTATION_TRUST_ACCOUNT) {
1111 ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
1112 "FALSE");
1113 if (ret != LDB_SUCCESS) {
1114 return ret;
1115 }
1116 el2 = ldb_msg_find_element(ac->msg,
1117 "isCriticalSystemObject");
1118 el2->flags = LDB_FLAG_MOD_REPLACE;
1119 }
1120
1121 /* Step 1.4: "userAccountControl" -> "primaryGroupID" mapping */
1122 if (!ldb_msg_find_element(ac->msg, "primaryGroupID")) {
1123 uint32_t rid = ds_uf2prim_group_rid(user_account_control);
1124
1125 /*
1126 * Older AD deployments don't know about the
1127 * RODC group
1128 */
1129 if (rid == DOMAIN_RID_READONLY_DCS) {
1130 ret = samldb_prim_group_tester(ac, rid);
1131 if (ret != LDB_SUCCESS) {
1132 return ret;
1133 }
1134 }
1135
1136 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1137 "primaryGroupID", rid);
1138 if (ret != LDB_SUCCESS) {
1139 return ret;
1140 }
1141 el2 = ldb_msg_find_element(ac->msg,
1142 "primaryGroupID");
1143 el2->flags = LDB_FLAG_MOD_REPLACE;
1144 }
1145
1146 /* Step 1.5: Add additional flags when needed */
1147 /* Obviously this is done when the "userAccountControl"
1148 * has been generated here (tested against Windows
1149 * Server) */
1150 if (uac_generated) {
1151 if (uac_add_flags) {
1152 user_account_control |= UF_ACCOUNTDISABLE;
1153 user_account_control |= UF_PASSWD_NOTREQD;
1154 }
1155
1156 ret = samdb_msg_set_uint(ldb, ac->msg, ac->msg,
1157 "userAccountControl",
1158 user_account_control);
1159 if (ret != LDB_SUCCESS) {
1160 return ret;
1161 }
1162 }
1163
1164 }
1165 break;
1166 }
1167
1168 case SAMLDB_TYPE_GROUP: {
1169 const char *tempstr;
1170
1171 /* Step 2.2: Default values */
1172 tempstr = talloc_asprintf(ac->msg, "%d",
1173 GTYPE_SECURITY_GLOBAL_GROUP);
1174 if (tempstr == NULL) return ldb_operr(ldb);
1175 ret = samdb_find_or_add_attribute(ldb, ac->msg,
1176 "groupType", tempstr);
1177 if (ret != LDB_SUCCESS) return ret;
1178
1179 /* Step 2.3: "groupType" -> "sAMAccountType" */
1180 el = ldb_msg_find_element(ac->msg, "groupType");
1181 if (el != NULL) {
1182 uint32_t group_type, account_type;
1183
1184 group_type = ldb_msg_find_attr_as_uint(ac->msg,
1185 "groupType", 0);
1186
1187 /* The creation of builtin groups requires the
1188 * RELAX control */
1189 if (group_type == GTYPE_SECURITY_BUILTIN_LOCAL_GROUP) {
1190 if (ldb_request_get_control(ac->req,
1191 LDB_CONTROL_RELAX_OID) == NULL) {
1192 return LDB_ERR_UNWILLING_TO_PERFORM;
1193 }
1194 }
1195
1196 account_type = ds_gtype2atype(group_type);
1197 if (account_type == 0) {
1198 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
1199 return LDB_ERR_UNWILLING_TO_PERFORM;
1200 }
1201 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1202 "sAMAccountType",
1203 account_type);
1204 if (ret != LDB_SUCCESS) {
1205 return ret;
1206 }
1207 el2 = ldb_msg_find_element(ac->msg, "sAMAccountType");
1208 el2->flags = LDB_FLAG_MOD_REPLACE;
1209 }
1210 break;
1211 }
1212
1213 default:
1214 ldb_asprintf_errstring(ldb,
1215 "Invalid entry type!");
1216 return LDB_ERR_OPERATIONS_ERROR;
1217 break;
1218 }
1219
1220 return LDB_SUCCESS;
1221 }
1222
1223 /*
1224 * "Primary group ID" trigger (MS-SAMR 3.1.1.8.2)
1225 *
1226 * Has to be invoked on "add" and "modify" operations on "user" and "computer"
1227 * objects.
1228 * ac->msg contains the "add"/"modify" message
1229 */
1230
1231 static int samldb_prim_group_tester(struct samldb_ctx *ac, uint32_t rid)
1232 {
1233 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1234 struct dom_sid *sid;
1235 struct ldb_result *res;
1236 int ret;
1237 const char * const noattrs[] = { NULL };
1238
1239 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
1240 if (sid == NULL) {
1241 return ldb_operr(ldb);
1242 }
1243
1244 ret = dsdb_module_search(ac->module, ac, &res,
1245 ldb_get_default_basedn(ldb),
1246 LDB_SCOPE_SUBTREE,
1247 noattrs, DSDB_FLAG_NEXT_MODULE,
1248 ac->req,
1249 "(objectSid=%s)",
1250 ldap_encode_ndr_dom_sid(ac, sid));
1251 if (ret != LDB_SUCCESS) {
1252 return ret;
1253 }
1254 if (res->count != 1) {
1255 talloc_free(res);
1256 ldb_asprintf_errstring(ldb,
1257 "Failed to find primary group with RID %u!",
1258 rid);
1259 return LDB_ERR_UNWILLING_TO_PERFORM;
1260 }
1261 talloc_free(res);
1262
1263 return LDB_SUCCESS;
1264 }
1265
1266 static int samldb_prim_group_set(struct samldb_ctx *ac)
1267 {
1268 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1269 uint32_t rid;
1270
1271 rid = ldb_msg_find_attr_as_uint(ac->msg, "primaryGroupID", (uint32_t) -1);
1272 if (rid == (uint32_t) -1) {
1273 /* we aren't affected of any primary group set */
1274 return LDB_SUCCESS;
1275
1276 } else if (!ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
1277 ldb_set_errstring(ldb,
1278 "The primary group isn't settable on add operations!");
1279 return LDB_ERR_UNWILLING_TO_PERFORM;
1280 }
1281
1282 return samldb_prim_group_tester(ac, rid);
1283 }
1284
1285 static int samldb_prim_group_change(struct samldb_ctx *ac)
1286 {
1287 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1288 const char * const attrs[] = { "primaryGroupID", "memberOf", NULL };
1289 struct ldb_result *res, *group_res;
1290 struct ldb_message_element *el;
1291 struct ldb_message *msg;
1292 uint32_t prev_rid, new_rid;
1293 struct dom_sid *prev_sid, *new_sid;
1294 struct ldb_dn *prev_prim_group_dn, *new_prim_group_dn;
1295 int ret;
1296 const char * const noattrs[] = { NULL };
1297
1298 el = dsdb_get_single_valued_attr(ac->msg, "primaryGroupID",
1299 ac->req->operation);
1300 if (el == NULL) {
1301 /* we are not affected */
1302 return LDB_SUCCESS;
1303 }
1304
1305 /* Fetch information from the existing object */
1306
1307 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
1308 DSDB_FLAG_NEXT_MODULE, ac->req);
1309 if (ret != LDB_SUCCESS) {
1310 return ret;
1311 }
1312
1313 /* Finds out the DN of the old primary group */
1314
1315 prev_rid = ldb_msg_find_attr_as_uint(res->msgs[0], "primaryGroupID",
1316 (uint32_t) -1);
1317 if (prev_rid == (uint32_t) -1) {
1318 /* User objects do always have a mandatory "primaryGroupID"
1319 * attribute. If this doesn't exist then the object is of the
1320 * wrong type. This is the exact Windows error code */
1321 return LDB_ERR_OBJECT_CLASS_VIOLATION;
1322 }
1323
1324 prev_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), prev_rid);
1325 if (prev_sid == NULL) {
1326 return ldb_operr(ldb);
1327 }
1328
1329 /* Finds out the DN of the new primary group
1330 * Notice: in order to parse the primary group ID correctly we create
1331 * a temporary message here. */
1332
1333 msg = ldb_msg_new(ac->msg);
1334 if (msg == NULL) {
1335 return ldb_module_oom(ac->module);
1336 }
1337 ret = ldb_msg_add(msg, el, 0);
1338 if (ret != LDB_SUCCESS) {
1339 return ret;
1340 }
1341 new_rid = ldb_msg_find_attr_as_uint(msg, "primaryGroupID", (uint32_t) -1);
1342 talloc_free(msg);
1343 if (new_rid == (uint32_t) -1) {
1344 /* we aren't affected of any primary group change */
1345 return LDB_SUCCESS;
1346 }
1347
1348 if (prev_rid == new_rid) {
1349 return LDB_SUCCESS;
1350 }
1351
1352 ret = dsdb_module_search(ac->module, ac, &group_res,
1353 ldb_get_default_basedn(ldb),
1354 LDB_SCOPE_SUBTREE,
1355 noattrs, DSDB_FLAG_NEXT_MODULE,
1356 ac->req,
1357 "(objectSid=%s)",
1358 ldap_encode_ndr_dom_sid(ac, prev_sid));
1359 if (ret != LDB_SUCCESS) {
1360 return ret;
1361 }
1362 if (group_res->count != 1) {
1363 return ldb_operr(ldb);
1364 }
1365 prev_prim_group_dn = group_res->msgs[0]->dn;
1366
1367 new_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), new_rid);
1368 if (new_sid == NULL) {
1369 return ldb_operr(ldb);
1370 }
1371
1372 ret = dsdb_module_search(ac->module, ac, &group_res,
1373 ldb_get_default_basedn(ldb),
1374 LDB_SCOPE_SUBTREE,
1375 noattrs, DSDB_FLAG_NEXT_MODULE,
1376 ac->req,
1377 "(objectSid=%s)",
1378 ldap_encode_ndr_dom_sid(ac, new_sid));
1379 if (ret != LDB_SUCCESS) {
1380 return ret;
1381 }
1382 if (group_res->count != 1) {
1383 /* Here we know if the specified new primary group candidate is
1384 * valid or not. */
1385 return LDB_ERR_UNWILLING_TO_PERFORM;
1386 }
1387 new_prim_group_dn = group_res->msgs[0]->dn;
1388
1389 /* We need to be already a normal member of the new primary
1390 * group in order to be successful. */
1391 el = samdb_find_attribute(ldb, res->msgs[0], "memberOf",
1392 ldb_dn_get_linearized(new_prim_group_dn));
1393 if (el == NULL) {
1394 return LDB_ERR_UNWILLING_TO_PERFORM;
1395 }
1396
1397 /* Remove the "member" attribute on the new primary group */
1398 msg = ldb_msg_new(ac->msg);
1399 if (msg == NULL) {
1400 return ldb_module_oom(ac->module);
1401 }
1402 msg->dn = new_prim_group_dn;
1403
1404 ret = samdb_msg_add_delval(ldb, msg, msg, "member",
1405 ldb_dn_get_linearized(ac->msg->dn));
1406 if (ret != LDB_SUCCESS) {
1407 return ret;
1408 }
1409
1410 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
1411 if (ret != LDB_SUCCESS) {
1412 return ret;
1413 }
1414 talloc_free(msg);
1415
1416 /* Add a "member" attribute for the previous primary group */
1417 msg = ldb_msg_new(ac->msg);
1418 if (msg == NULL) {
1419 return ldb_module_oom(ac->module);
1420 }
1421 msg->dn = prev_prim_group_dn;
1422
1423 ret = samdb_msg_add_addval(ldb, msg, msg, "member",
1424 ldb_dn_get_linearized(ac->msg->dn));
1425 if (ret != LDB_SUCCESS) {
1426 return ret;
1427 }
1428
1429 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
1430 if (ret != LDB_SUCCESS) {
1431 return ret;
1432 }
1433 talloc_free(msg);
1434
1435 return LDB_SUCCESS;
1436 }
1437
1438 static int samldb_prim_group_trigger(struct samldb_ctx *ac)
1439 {
1440 int ret;
1441
1442 if (ac->req->operation == LDB_ADD) {
1443 ret = samldb_prim_group_set(ac);
1444 } else {
1445 ret = samldb_prim_group_change(ac);
1446 }
1447
1448 return ret;
1449 }
1450
1451 static int samldb_check_user_account_control_invariants(struct samldb_ctx *ac,
1452 uint32_t user_account_control)
1453 {
1454 int i, ret = 0;
1455 bool need_check = false;
1456 const struct uac_to_guid {
1457 uint32_t uac;
1458 bool never;
1459 uint32_t needs;
1460 uint32_t not_with;
1461 const char *error_string;
1462 } map[] = {
1463 {
1464 .uac = UF_TEMP_DUPLICATE_ACCOUNT,
1465 .never = true,
1466 .error_string = "Updating the UF_TEMP_DUPLICATE_ACCOUNT flag is never allowed"
1467 },
1468 {
1469 .uac = UF_PARTIAL_SECRETS_ACCOUNT,
1470 .needs = UF_WORKSTATION_TRUST_ACCOUNT,
1471 .error_string = "Setting UF_PARTIAL_SECRETS_ACCOUNT only permitted with UF_WORKSTATION_TRUST_ACCOUNT"
1472 },
1473 {
1474 .uac = UF_TRUSTED_FOR_DELEGATION,
1475 .not_with = UF_PARTIAL_SECRETS_ACCOUNT,
1476 .error_string = "Setting UF_TRUSTED_FOR_DELEGATION not allowed with UF_PARTIAL_SECRETS_ACCOUNT"
1477 },
1478 {
1479 .uac = UF_NORMAL_ACCOUNT,
1480 .not_with = UF_ACCOUNT_TYPE_MASK & ~UF_NORMAL_ACCOUNT,
1481 .error_string = "Setting more than one account type not permitted"
1482 },
1483 {
1484 .uac = UF_WORKSTATION_TRUST_ACCOUNT,
1485 .not_with = UF_ACCOUNT_TYPE_MASK & ~UF_WORKSTATION_TRUST_ACCOUNT,
1486 .error_string = "Setting more than one account type not permitted"
1487 },
1488 {
1489 .uac = UF_INTERDOMAIN_TRUST_ACCOUNT,
1490 .not_with = UF_ACCOUNT_TYPE_MASK & ~UF_INTERDOMAIN_TRUST_ACCOUNT,
1491 .error_string = "Setting more than one account type not permitted"
1492 },
1493 {
1494 .uac = UF_SERVER_TRUST_ACCOUNT,
1495 .not_with = UF_ACCOUNT_TYPE_MASK & ~UF_SERVER_TRUST_ACCOUNT,
1496 .error_string = "Setting more than one account type not permitted"
1497 },
1498 {
1499 .uac = UF_TRUSTED_FOR_DELEGATION,
1500 .not_with = UF_PARTIAL_SECRETS_ACCOUNT,
1501 .error_string = "Setting UF_TRUSTED_FOR_DELEGATION not allowed with UF_PARTIAL_SECRETS_ACCOUNT"
1502 }
1503 };
1504
1505 for (i = 0; i < ARRAY_SIZE(map); i++) {
1506 if (user_account_control & map[i].uac) {
1507 need_check = true;
1508 break;
1509 }
1510 }
1511 if (need_check == false) {
1512 return LDB_SUCCESS;
1513 }
1514
1515 for (i = 0; i < ARRAY_SIZE(map); i++) {
1516 uint32_t this_uac = user_account_control & map[i].uac;
1517 if (this_uac != 0) {
1518 if (map[i].never) {
1519 ret = LDB_ERR_OTHER;
1520 break;
1521 } else if (map[i].needs != 0) {
1522 if ((map[i].needs & user_account_control) == 0) {
1523 ret = LDB_ERR_OTHER;
1524 break;
1525 }
1526 } else if (map[i].not_with != 0) {
1527 if ((map[i].not_with & user_account_control) != 0) {
1528 ret = LDB_ERR_OTHER;
1529 break;
1530 }
1531 }
1532 }
1533 }
1534 if (ret != LDB_SUCCESS) {
1535 switch (ac->req->operation) {
1536 case LDB_ADD:
1537 ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
1538 "Failed to add %s: %s",
1539 ldb_dn_get_linearized(ac->msg->dn),
1540 map[i].error_string);
1541 break;
1542 case LDB_MODIFY:
1543 ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
1544 "Failed to modify %s: %s",
1545 ldb_dn_get_linearized(ac->msg->dn),
1546 map[i].error_string);
1547 break;
1548 default:
1549 return ldb_module_operr(ac->module);
1550 }
1551 }
1552 return ret;
1553 }
1554
1555 /**
1556 * Validate that the restriction in point 5 of MS-SAMR 3.1.1.8.10 userAccountControl is honoured
1557 *
1558 */
1559 static int samldb_check_user_account_control_acl(struct samldb_ctx *ac,
1560 struct dom_sid *sid,
1561 uint32_t user_account_control,
1562 uint32_t user_account_control_old)
1563 {
1564 int i, ret = 0;
1565 bool need_acl_check = false;
1566 struct ldb_result *res;
1567 const char * const sd_attrs[] = {"ntSecurityDescriptor", NULL};
1568 struct security_token *user_token;
1569 struct security_descriptor *domain_sd;
1570 struct ldb_dn *domain_dn = ldb_get_default_basedn(ldb_module_get_ctx(ac->module));
1571 const struct uac_to_guid {
1572 uint32_t uac;
1573 const char *oid;
1574 const char *guid;
1575 enum sec_privilege privilege;
1576 bool delete_is_privileged;
1577 const char *error_string;
1578 } map[] = {
1579 {
1580 .uac = UF_PASSWD_NOTREQD,
1581 .guid = GUID_DRS_UPDATE_PASSWORD_NOT_REQUIRED_BIT,
1582 .error_string = "Adding the UF_PASSWD_NOTREQD bit in userAccountControl requires the Update-Password-Not-Required-Bit right that was not given on the Domain object"
1583 },
1584 {
1585 .uac = UF_DONT_EXPIRE_PASSWD,
1586 .guid = GUID_DRS_UNEXPIRE_PASSWORD,
1587 .error_string = "Adding the UF_DONT_EXPIRE_PASSWD bit in userAccountControl requires the Unexpire-Password right that was not given on the Domain object"
1588 },
1589 {
1590 .uac = UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED,
1591 .guid = GUID_DRS_ENABLE_PER_USER_REVERSIBLY_ENCRYPTED_PASSWORD,
1592 .error_string = "Adding the UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED bit in userAccountControl requires the Enable-Per-User-Reversibly-Encrypted-Password right that was not given on the Domain object"
1593 },
1594 {
1595 .uac = UF_SERVER_TRUST_ACCOUNT,
1596 .guid = GUID_DRS_DS_INSTALL_REPLICA,
1597 .error_string = "Adding the UF_SERVER_TRUST_ACCOUNT bit in userAccountControl requires the DS-Install-Replica right that was not given on the Domain object"
1598 },
1599 {
1600 .uac = UF_PARTIAL_SECRETS_ACCOUNT,
1601 .guid = GUID_DRS_DS_INSTALL_REPLICA,
1602 .error_string = "Adding the UF_PARTIAL_SECRETS_ACCOUNT bit in userAccountControl requires the DS-Install-Replica right that was not given on the Domain object"
1603 },
1604 {
1605 .uac = UF_INTERDOMAIN_TRUST_ACCOUNT,
1606 .oid = DSDB_CONTROL_PERMIT_INTERDOMAIN_TRUST_UAC_OID,
1607 .error_string = "Updating the UF_INTERDOMAIN_TRUST_ACCOUNT bit in userAccountControl is not permitted over LDAP. This bit is restricted to the LSA CreateTrustedDomain interface",
1608 .delete_is_privileged = true
1609 },
1610 {
1611 .uac = UF_TRUSTED_FOR_DELEGATION,
1612 .privilege = SEC_PRIV_ENABLE_DELEGATION,
1613 .delete_is_privileged = true,
1614 .error_string = "Updating the UF_TRUSTED_FOR_DELEGATION bit in userAccountControl is not permitted without the SeEnableDelegationPrivilege"
1615 },
1616 {
1617 .uac = UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION,
1618 .privilege = SEC_PRIV_ENABLE_DELEGATION,
1619 .delete_is_privileged = true,
1620 .error_string = "Updating the UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION bit in userAccountControl is not permitted without the SeEnableDelegationPrivilege"
1621 }
1622
1623 };
1624
1625 if (dsdb_module_am_system(ac->module)) {
1626 return LDB_SUCCESS;
1627 }
1628
1629 for (i = 0; i < ARRAY_SIZE(map); i++) {
1630 if (user_account_control & map[i].uac) {
1631 need_acl_check = true;
1632 break;
1633 }
1634 }
1635 if (need_acl_check == false) {
1636 return LDB_SUCCESS;
1637 }
1638
1639 user_token = acl_user_token(ac->module);
1640 if (user_token == NULL) {
1641 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1642 }
1643
1644 ret = dsdb_module_search_dn(ac->module, ac, &res,
1645 domain_dn,
1646 sd_attrs,
1647 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
1648 ac->req);
1649 if (ret != LDB_SUCCESS) {
1650 return ret;
1651 }
1652 if (res->count != 1) {
1653 return ldb_module_operr(ac->module);
1654 }
1655
1656 ret = dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(ac->module),
1657 ac, res->msgs[0], &domain_sd);
1658
1659 if (ret != LDB_SUCCESS) {
1660 return ret;
1661 }
1662
1663 for (i = 0; i < ARRAY_SIZE(map); i++) {
1664 uint32_t this_uac_new = user_account_control & map[i].uac;
1665 uint32_t this_uac_old = user_account_control_old & map[i].uac;
1666 if (this_uac_new != this_uac_old) {
1667 if (this_uac_old != 0) {
1668 if (map[i].delete_is_privileged == false) {
1669 continue;
1670 }
1671 }
1672 if (map[i].oid) {
1673 struct ldb_control *control = ldb_request_get_control(ac->req, map[i].oid);
1674 if (control == NULL) {
1675 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1676 }
1677 } else if (map[i].privilege != SEC_PRIV_INVALID) {
1678 bool have_priv = security_token_has_privilege(user_token,
1679 map[i].privilege);
1680 if (have_priv == false) {
1681 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1682 }
1683 } else {
1684 ret = acl_check_extended_right(ac, domain_sd,
1685 user_token,
1686 map[i].guid,
1687 SEC_ADS_CONTROL_ACCESS,
1688 sid);
1689 }
1690 if (ret != LDB_SUCCESS) {
1691 break;
1692 }
1693 }
1694 }
1695 if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
1696 switch (ac->req->operation) {
1697 case LDB_ADD:
1698 ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
1699 "Failed to add %s: %s",
1700 ldb_dn_get_linearized(ac->msg->dn),
1701 map[i].error_string);
1702 break;
1703 case LDB_MODIFY:
1704 ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
1705 "Failed to modify %s: %s",
1706 ldb_dn_get_linearized(ac->msg->dn),
1707 map[i].error_string);
1708 break;
1709 default:
1710 return ldb_module_operr(ac->module);
1711 }
1712 if (map[i].guid) {
1713 dsdb_acl_debug(domain_sd, acl_user_token(ac->module),
1714 domain_dn,
1715 true,
1716 10);
1717 }
1718 }
1719 return ret;
1720 }
1721
1722 static int samldb_check_user_account_control_rules(struct samldb_ctx *ac,
1723 struct dom_sid *sid,
1724 uint32_t user_account_control,
1725 uint32_t user_account_control_old)
1726 {
1727 int ret;
1728 ret = samldb_check_user_account_control_invariants(ac, user_account_control);
1729 if (ret != LDB_SUCCESS) {
1730 return ret;
1731 }
1732 ret = samldb_check_user_account_control_acl(ac, sid, user_account_control, user_account_control_old);
1733 if (ret != LDB_SUCCESS) {
1734 return ret;
1735 }
1736 return ret;
1737 }
1738
1739
1740 /**
1741 * This function is called on LDB modify operations. It performs some additions/
1742 * replaces on the current LDB message when "userAccountControl" changes.
1743 */
1744 static int samldb_user_account_control_change(struct samldb_ctx *ac)
1745 {
1746 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1747 uint32_t old_uac;
1748 uint32_t new_uac;
1749 uint32_t raw_uac;
1750 uint32_t old_ufa;
1751 uint32_t new_ufa;
1752 uint32_t old_acb;
1753 uint32_t new_acb;
1754 uint32_t clear_acb;
1755 uint32_t old_atype;
1756 uint32_t new_atype;
1757 uint32_t old_pgrid;
1758 uint32_t new_pgrid;
1759 NTTIME old_lockoutTime;
1760 struct ldb_message_element *el;
1761 struct ldb_val *val;
1762 struct ldb_val computer_val;
1763 struct ldb_message *tmp_msg;
1764 struct dom_sid *sid;
1765 int ret;
1766 struct ldb_result *res;
1767 const char * const attrs[] = {
1768 "objectClass",
1769 "isCriticalSystemObject",
1770 "userAccountControl",
1771 "msDS-User-Account-Control-Computed",
1772 "lockoutTime",
1773 "objectSid",
1774 NULL
1775 };
1776 bool is_computer = false;
1777 bool old_is_critical = false;
1778 bool new_is_critical = false;
1779
1780 el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl",
1781 ac->req->operation);
1782 if (el == NULL || el->num_values == 0) {
1783 ldb_asprintf_errstring(ldb,
1784 "%08X: samldb: 'userAccountControl' can't be deleted!",
1785 W_ERROR_V(WERR_DS_ILLEGAL_MOD_OPERATION));
1786 return LDB_ERR_UNWILLING_TO_PERFORM;
1787 }
1788
1789 /* Create a temporary message for fetching the "userAccountControl" */
1790 tmp_msg = ldb_msg_new(ac->msg);
1791 if (tmp_msg == NULL) {
1792 return ldb_module_oom(ac->module);
1793 }
1794 ret = ldb_msg_add(tmp_msg, el, 0);
1795 if (ret != LDB_SUCCESS) {
1796 return ret;
1797 }
1798 raw_uac = ldb_msg_find_attr_as_uint(tmp_msg,
1799 "userAccountControl",
1800 0);
1801 new_acb = samdb_result_acct_flags(tmp_msg, NULL);
1802 talloc_free(tmp_msg);
1803 /*
1804 * UF_LOCKOUT and UF_PASSWORD_EXPIRED are only generated
1805 * and not stored. We ignore them almost completely.
1806 *
1807 * The only exception is the resulting ACB_AUTOLOCK in clear_acb.
1808 */
1809 new_uac = raw_uac & ~(UF_LOCKOUT|UF_PASSWORD_EXPIRED);
1810
1811 /* Fetch the old "userAccountControl" and "objectClass" */
1812 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
1813 DSDB_FLAG_NEXT_MODULE, ac->req);
1814 if (ret != LDB_SUCCESS) {
1815 return ret;
1816 }
1817 old_uac = ldb_msg_find_attr_as_uint(res->msgs[0], "userAccountControl", 0);
1818 if (old_uac == 0) {
1819 return ldb_operr(ldb);
1820 }
1821 old_acb = samdb_result_acct_flags(res->msgs[0],
1822 "msDS-User-Account-Control-Computed");
1823 old_lockoutTime = ldb_msg_find_attr_as_int64(res->msgs[0],
1824 "lockoutTime", 0);
1825 old_is_critical = ldb_msg_find_attr_as_bool(res->msgs[0],
1826 "isCriticalSystemObject", 0);
1827 /* When we do not have objectclass "omputer" we cannot switch to a (read-only) DC */
1828 el = ldb_msg_find_element(res->msgs[0], "objectClass");
1829 if (el == NULL) {
1830 return ldb_operr(ldb);
1831 }
1832 computer_val = data_blob_string_const("computer");
1833 val = ldb_msg_find_val(el, &computer_val);
1834 if (val != NULL) {
1835 is_computer = true;
1836 }
1837
1838 old_ufa = old_uac & UF_ACCOUNT_TYPE_MASK;
1839 old_atype = ds_uf2atype(old_ufa);
1840 old_pgrid = ds_uf2prim_group_rid(old_uac);
1841
1842 new_ufa = new_uac & UF_ACCOUNT_TYPE_MASK;
1843 if (new_ufa == 0) {
1844 /*
1845 * When there is no account type embedded in "userAccountControl"
1846 * fall back to UF_NORMAL_ACCOUNT.
1847 */
1848 new_ufa = UF_NORMAL_ACCOUNT;
1849 new_uac |= new_ufa;
1850 }
1851 sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
1852 if (sid == NULL) {
1853 return ldb_module_operr(ac->module);
1854 }
1855
1856 ret = samldb_check_user_account_control_rules(ac, sid, new_uac, old_uac);
1857 if (ret != LDB_SUCCESS) {
1858 return ret;
1859 }
1860
1861 new_atype = ds_uf2atype(new_ufa);
1862 new_pgrid = ds_uf2prim_group_rid(new_uac);
1863
1864 clear_acb = old_acb & ~new_acb;
1865
1866 switch (new_ufa) {
1867 case UF_NORMAL_ACCOUNT:
1868 new_is_critical = old_is_critical;
1869 break;
1870
1871 case UF_INTERDOMAIN_TRUST_ACCOUNT:
1872 new_is_critical = true;
1873 break;
1874
1875 case UF_WORKSTATION_TRUST_ACCOUNT:
1876 new_is_critical = false;
1877 if (new_uac & UF_PARTIAL_SECRETS_ACCOUNT) {
1878 if (!is_computer) {
1879 ldb_asprintf_errstring(ldb,
1880 "%08X: samldb: UF_PARTIAL_SECRETS_ACCOUNT "
1881 "requires objectclass 'computer'!",
1882 W_ERROR_V(WERR_DS_MACHINE_ACCOUNT_CREATED_PRENT4));
1883 return LDB_ERR_UNWILLING_TO_PERFORM;
1884 }
1885 new_is_critical = true;
1886 }
1887 break;
1888
1889 case UF_SERVER_TRUST_ACCOUNT:
1890 if (!is_computer) {
1891 ldb_asprintf_errstring(ldb,
1892 "%08X: samldb: UF_SERVER_TRUST_ACCOUNT "
1893 "requires objectclass 'computer'!",
1894 W_ERROR_V(WERR_DS_MACHINE_ACCOUNT_CREATED_PRENT4));
1895 return LDB_ERR_UNWILLING_TO_PERFORM;
1896 }
1897 new_is_critical = true;
1898 break;
1899
1900 default:
1901 ldb_asprintf_errstring(ldb,
1902 "%08X: samldb: invalid userAccountControl[0x%08X]",
1903 W_ERROR_V(WERR_INVALID_PARAMETER), raw_uac);
1904 return LDB_ERR_OTHER;
1905 }
1906
1907 if (old_atype != new_atype) {
1908 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1909 "sAMAccountType", new_atype);
1910 if (ret != LDB_SUCCESS) {
1911 return ret;
1912 }
1913 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
1914 el->flags = LDB_FLAG_MOD_REPLACE;
1915 }
1916
1917 /* As per MS-SAMR 3.1.1.8.10 these flags have not to be set */
1918 if ((clear_acb & ACB_AUTOLOCK) && (old_lockoutTime != 0)) {
1919 /* "pwdLastSet" reset as password expiration has been forced */
1920 ldb_msg_remove_attr(ac->msg, "lockoutTime");
1921 ret = samdb_msg_add_uint64(ldb, ac->msg, ac->msg, "lockoutTime",
1922 (NTTIME)0);
1923 if (ret != LDB_SUCCESS) {
1924 return ret;
1925 }
1926 el = ldb_msg_find_element(ac->msg, "lockoutTime");
1927 el->flags = LDB_FLAG_MOD_REPLACE;
1928 }
1929
1930 /* "isCriticalSystemObject" might be set/changed */
1931 if (old_is_critical != new_is_critical) {
1932 ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
1933 new_is_critical ? "TRUE": "FALSE");
1934 if (ret != LDB_SUCCESS) {
1935 return ret;
1936 }
1937 el = ldb_msg_find_element(ac->msg,
1938 "isCriticalSystemObject");
1939 el->flags = LDB_FLAG_MOD_REPLACE;
1940 }
1941
1942 if (!ldb_msg_find_element(ac->msg, "primaryGroupID") &&
1943 (old_pgrid != new_pgrid)) {
1944 /* Older AD deployments don't know about the RODC group */
1945 if (new_pgrid == DOMAIN_RID_READONLY_DCS) {
1946 ret = samldb_prim_group_tester(ac, new_pgrid);
1947 if (ret != LDB_SUCCESS) {
1948 return ret;
1949 }
1950 }
1951
1952 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1953 "primaryGroupID", new_pgrid);
1954 if (ret != LDB_SUCCESS) {
1955 return ret;
1956 }
1957 el = ldb_msg_find_element(ac->msg,
1958 "primaryGroupID");
1959 el->flags = LDB_FLAG_MOD_REPLACE;
1960 }
1961
1962 /* Propagate eventual "userAccountControl" attribute changes */
1963 if (old_uac != new_uac) {
1964 char *tempstr = talloc_asprintf(ac->msg, "%d",
1965 new_uac);
1966 if (tempstr == NULL) {
1967 return ldb_module_oom(ac->module);
1968 }
1969
1970 /* Overwrite "userAccountControl" correctly */
1971 el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl",
1972 ac->req->operation);
1973 el->values[0].data = (uint8_t *) tempstr;
1974 el->values[0].length = strlen(tempstr);
1975 } else {
1976 ldb_msg_remove_attr(ac->msg, "userAccountControl");
1977 }
1978
1979 return LDB_SUCCESS;
1980 }
1981
1982 static int samldb_lockout_time(struct samldb_ctx *ac)
1983 {
1984 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1985 NTTIME lockoutTime;
1986 struct ldb_message_element *el;
1987 struct ldb_message *tmp_msg;
1988 int ret;
1989
1990 el = dsdb_get_single_valued_attr(ac->msg, "lockoutTime",
1991 ac->req->operation);
1992 if (el == NULL || el->num_values == 0) {
1993 ldb_asprintf_errstring(ldb,
1994 "%08X: samldb: 'lockoutTime' can't be deleted!",
1995 W_ERROR_V(WERR_DS_ILLEGAL_MOD_OPERATION));
1996 return LDB_ERR_UNWILLING_TO_PERFORM;
1997 }
1998
1999 /* Create a temporary message for fetching the "lockoutTime" */
2000 tmp_msg = ldb_msg_new(ac->msg);
2001 if (tmp_msg == NULL) {
2002 return ldb_module_oom(ac->module);
2003 }
2004 ret = ldb_msg_add(tmp_msg, el, 0);
2005 if (ret != LDB_SUCCESS) {
2006 return ret;
2007 }
2008 lockoutTime = ldb_msg_find_attr_as_int64(tmp_msg,
2009 "lockoutTime",
2010 0);
2011 talloc_free(tmp_msg);
2012
2013 if (lockoutTime != 0) {
2014 return LDB_SUCCESS;
2015 }
2016
2017 /* lockoutTime == 0 resets badPwdCount */
2018 ldb_msg_remove_attr(ac->msg, "badPwdCount");
2019 ret = samdb_msg_add_int(ldb, ac->msg, ac->msg,
2020 "badPwdCount", 0);
2021 if (ret != LDB_SUCCESS) {
2022 return ret;
2023 }
2024 el = ldb_msg_find_element(ac->msg, "badPwdCount");
2025 el->flags = LDB_FLAG_MOD_REPLACE;
2026
2027 return LDB_SUCCESS;
2028 }
2029
2030 static int samldb_group_type_change(struct samldb_ctx *ac)
2031 {
2032 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2033 uint32_t group_type, old_group_type, account_type;
2034 struct ldb_message_element *el;
2035 struct ldb_message *tmp_msg;
2036 int ret;
2037 struct ldb_result *res;
2038 const char * const attrs[] = { "groupType", NULL };
2039
2040 el = dsdb_get_single_valued_attr(ac->msg, "groupType",
2041 ac->req->operation);
2042 if (el == NULL) {
2043 /* we are not affected */
2044 return LDB_SUCCESS;
2045 }
2046
2047 /* Create a temporary message for fetching the "groupType" */
2048 tmp_msg = ldb_msg_new(ac->msg);
2049 if (tmp_msg == NULL) {
2050 return ldb_module_oom(ac->module);
2051 }
2052 ret = ldb_msg_add(tmp_msg, el, 0);
2053 if (ret != LDB_SUCCESS) {
2054 return ret;
2055 }
2056 group_type = ldb_msg_find_attr_as_uint(tmp_msg, "groupType", 0);
2057 talloc_free(tmp_msg);
2058
2059 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
2060 DSDB_FLAG_NEXT_MODULE |
2061 DSDB_SEARCH_SHOW_DELETED, ac->req);
2062 if (ret != LDB_SUCCESS) {
2063 return ret;
2064 }
2065 old_group_type = ldb_msg_find_attr_as_uint(res->msgs[0], "groupType", 0);
2066 if (old_group_type == 0) {
2067 return ldb_operr(ldb);
2068 }
2069
2070 /* Group type switching isn't so easy as it seems: We can only
2071 * change in this directions: global <-> universal <-> local
2072 * On each step also the group type itself
2073 * (security/distribution) is variable. */
2074
2075 if (ldb_request_get_control(ac->req, LDB_CONTROL_PROVISION_OID) == NULL) {
2076 switch (group_type) {
2077 case GTYPE_SECURITY_GLOBAL_GROUP:
2078 case GTYPE_DISTRIBUTION_GLOBAL_GROUP:
2079 /* change to "universal" allowed */
2080 if ((old_group_type == GTYPE_SECURITY_DOMAIN_LOCAL_GROUP) ||
2081 (old_group_type == GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP)) {
2082 ldb_set_errstring(ldb,
2083 "samldb: Change from security/distribution local group forbidden!");
2084 return LDB_ERR_UNWILLING_TO_PERFORM;
2085 }
2086 break;
2087
2088 case GTYPE_SECURITY_UNIVERSAL_GROUP:
2089 case GTYPE_DISTRIBUTION_UNIVERSAL_GROUP:
2090 /* each change allowed */
2091 break;
2092 case GTYPE_SECURITY_DOMAIN_LOCAL_GROUP:
2093 case GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP:
2094 /* change to "universal" allowed */
2095 if ((old_group_type == GTYPE_SECURITY_GLOBAL_GROUP) ||
2096 (old_group_type == GTYPE_DISTRIBUTION_GLOBAL_GROUP)) {
2097 ldb_set_errstring(ldb,
2098 "samldb: Change from security/distribution global group forbidden!");
2099 return LDB_ERR_UNWILLING_TO_PERFORM;
2100 }
2101 break;
2102
2103 case GTYPE_SECURITY_BUILTIN_LOCAL_GROUP:
2104 default:
2105 /* we don't allow this "groupType" values */
2106 return LDB_ERR_UNWILLING_TO_PERFORM;
2107 break;
2108 }
2109 }
2110
2111 account_type = ds_gtype2atype(group_type);
2112 if (account_type == 0) {
2113 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
2114 return LDB_ERR_UNWILLING_TO_PERFORM;
2115 }
2116 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType",
2117 account_type);
2118 if (ret != LDB_SUCCESS) {
2119 return ret;
2120 }
2121 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
2122 el->flags = LDB_FLAG_MOD_REPLACE;
2123
2124 return LDB_SUCCESS;
2125 }
2126
2127 static int samldb_sam_accountname_check(struct samldb_ctx *ac)
2128 {
2129 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2130 const char * const no_attrs[] = { NULL };
2131 struct ldb_result *res;
2132 const char *sam_accountname, *enc_str;
2133 struct ldb_message_element *el;
2134 struct ldb_message *tmp_msg;
2135 int ret;
2136
2137 el = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
2138 ac->req->operation);
2139 if (el == NULL) {
2140 /* we are not affected */
2141 return LDB_SUCCESS;
2142 }
2143
2144 /* Create a temporary message for fetching the "sAMAccountName" */
2145 tmp_msg = ldb_msg_new(ac->msg);
2146 if (tmp_msg == NULL) {
2147 return ldb_module_oom(ac->module);
2148 }
2149 ret = ldb_msg_add(tmp_msg, el, 0);
2150 if (ret != LDB_SUCCESS) {
2151 return ret;
2152 }
2153
2154 /* We must not steal the original string, it belongs to the caller! */
2155 sam_accountname = talloc_strdup(ac,
2156 ldb_msg_find_attr_as_string(tmp_msg, "sAMAccountName", NULL));
2157 talloc_free(tmp_msg);
2158
2159 if (sam_accountname == NULL) {
2160 /* The "sAMAccountName" cannot be nothing */
2161 ldb_set_errstring(ldb,
2162 "samldb: Empty account names aren't allowed!");
2163 return LDB_ERR_UNWILLING_TO_PERFORM;
2164 }
2165
2166 enc_str = ldb_binary_encode_string(ac, sam_accountname);
2167 if (enc_str == NULL) {
2168 return ldb_module_oom(ac->module);
2169 }
2170
2171 /* Make sure that a "sAMAccountName" is only used once */
2172
2173 ret = dsdb_module_search(ac->module, ac, &res,
2174 ldb_get_default_basedn(ldb),
2175 LDB_SCOPE_SUBTREE, no_attrs,
2176 DSDB_FLAG_NEXT_MODULE, ac->req,
2177 "(sAMAccountName=%s)", enc_str);
2178 if (ret != LDB_SUCCESS) {
2179 return ret;
2180 }
2181 if (res->count > 1) {
2182 return ldb_operr(ldb);
2183 } else if (res->count == 1) {
2184 if (ldb_dn_compare(res->msgs[0]->dn, ac->msg->dn) != 0) {
2185 ldb_asprintf_errstring(ldb,
2186 "samldb: Account name (sAMAccountName) '%s' already in use!",
2187 sam_accountname);
2188 return LDB_ERR_ENTRY_ALREADY_EXISTS;
2189 }
2190 }
2191 talloc_free(res);
2192
2193 return LDB_SUCCESS;
2194 }
2195
2196 static int samldb_member_check(struct samldb_ctx *ac)
2197 {
2198 const char * const attrs[] = { "objectSid", NULL };
2199 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2200 struct ldb_message_element *el;
2201 struct ldb_dn *member_dn;
2202 struct dom_sid *sid;
2203 struct ldb_result *res;
2204 struct dom_sid *group_sid;
2205 unsigned int i, j;
2206 int ret;
2207
2208 /* Fetch information from the existing object */
2209
2210 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
2211 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED, ac->req, NULL);
2212 if (ret != LDB_SUCCESS) {
2213 return ret;
2214 }
2215 if (res->count != 1) {
2216 return ldb_operr(ldb);
2217 }
2218
2219 group_sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
2220 if (group_sid == NULL) {
2221 return ldb_operr(ldb);
2222 }
2223
2224 /* We've to walk over all modification entries and consider the "member"
2225 * ones. */
2226 for (i = 0; i < ac->msg->num_elements; i++) {
2227 if (ldb_attr_cmp(ac->msg->elements[i].name, "member") != 0) {
2228 continue;
2229 }
2230
2231 el = &ac->msg->elements[i];
2232 for (j = 0; j < el->num_values; j++) {
2233 struct ldb_result *group_res;
2234 const char *group_attrs[] = { "primaryGroupID" , NULL };
2235 uint32_t prim_group_rid;
2236
2237 if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE) {
2238 /* Deletes will be handled in
2239 * repl_meta_data, and deletes not
2240 * matching a member will return
2241 * LDB_ERR_UNWILLING_TO_PERFORM
2242 * there */
2243 continue;
2244 }
2245
2246 member_dn = ldb_dn_from_ldb_val(ac, ldb,
2247 &el->values[j]);
2248 if (!ldb_dn_validate(member_dn)) {
2249 return ldb_operr(ldb);
2250 }
2251
2252 /* Denies to add "member"s to groups which are primary
2253 * ones for them - in this case return
2254 * ERR_ENTRY_ALREADY_EXISTS. */
2255
2256 ret = dsdb_module_search_dn(ac->module, ac, &group_res,
2257 member_dn, group_attrs,
2258 DSDB_FLAG_NEXT_MODULE, ac->req);
2259 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
2260 /* member DN doesn't exist yet */
2261 continue;
2262 }
2263 if (ret != LDB_SUCCESS) {
2264 return ret;
2265 }
2266 prim_group_rid = ldb_msg_find_attr_as_uint(group_res->msgs[0], "primaryGroupID", (uint32_t)-1);
2267 if (prim_group_rid == (uint32_t) -1) {
2268 /* the member hasn't to be a user account ->
2269 * therefore no check needed in this case. */
2270 continue;
2271 }
2272
2273 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb),
2274 prim_group_rid);
2275 if (sid == NULL) {
2276 return ldb_operr(ldb);
2277 }
2278
2279 if (dom_sid_equal(group_sid, sid)) {
2280 ldb_asprintf_errstring(ldb,
2281 "samldb: member %s already set via primaryGroupID %u",
2282 ldb_dn_get_linearized(member_dn), prim_group_rid);
2283 return LDB_ERR_ENTRY_ALREADY_EXISTS;
2284 }
2285 }
2286 }
2287
2288 talloc_free(res);
2289
2290 return LDB_SUCCESS;
2291 }
2292
2293 /* SAM objects have special rules regarding the "description" attribute on
2294 * modify operations. */
2295 static int samldb_description_check(struct samldb_ctx *ac, bool *modified)
2296 {
2297 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2298 const char * const attrs[] = { "objectClass", "description", NULL };
2299 struct ldb_result *res;
2300 unsigned int i;
2301 int ret;
2302
2303 /* Fetch information from the existing object */
2304 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
2305 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED, ac->req,
2306 "(|(objectclass=user)(objectclass=group)(objectclass=samDomain)(objectclass=samServer))");
2307 if (ret != LDB_SUCCESS) {
2308 /* don't treat it specially ... let normal error codes
2309 happen from other places */
2310 ldb_reset_err_string(ldb);
2311 return LDB_SUCCESS;
2312 }
2313 if (res->count == 0) {
2314 /* we didn't match the filter */
2315 talloc_free(res);
2316 return LDB_SUCCESS;
2317 }
2318
2319 /* We've to walk over all modification entries and consider the
2320 * "description" ones. */
2321 for (i = 0; i < ac->msg->num_elements; i++) {
2322 if (ldb_attr_cmp(ac->msg->elements[i].name, "description") == 0) {
2323 ac->msg->elements[i].flags |= LDB_FLAG_INTERNAL_FORCE_SINGLE_VALUE_CHECK;
2324 *modified = true;
2325 }
2326 }
2327
2328 talloc_free(res);
2329
2330 return LDB_SUCCESS;
2331 }
2332
2333 /* This trigger adapts the "servicePrincipalName" attributes if the
2334 * "dNSHostName" and/or "sAMAccountName" attribute change(s) */
2335 static int samldb_service_principal_names_change(struct samldb_ctx *ac)
2336 {
2337 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2338 struct ldb_message_element *el = NULL, *el2 = NULL;
2339 struct ldb_message *msg;
2340 const char * const attrs[] = { "servicePrincipalName", NULL };
2341 struct ldb_result *res;
2342 const char *dns_hostname = NULL, *old_dns_hostname = NULL,
2343 *sam_accountname = NULL, *old_sam_accountname = NULL;
2344 unsigned int i, j;
2345 int ret;
2346
2347 el = dsdb_get_single_valued_attr(ac->msg, "dNSHostName",
2348 ac->req->operation);
2349 el2 = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
2350 ac->req->operation);
2351 if ((el == NULL) && (el2 == NULL)) {
2352 /* we are not affected */
2353 return LDB_SUCCESS;
2354 }
2355
2356 /* Create a temporary message for fetching the "dNSHostName" */
2357 if (el != NULL) {
2358 const char *dns_attrs[] = { "dNSHostName", NULL };
2359 msg = ldb_msg_new(ac->msg);
2360 if (msg == NULL) {
2361 return ldb_module_oom(ac->module);
2362 }
2363 ret = ldb_msg_add(msg, el, 0);
2364 if (ret != LDB_SUCCESS) {
2365 return ret;
2366 }
2367 dns_hostname = talloc_strdup(ac,
2368 ldb_msg_find_attr_as_string(msg, "dNSHostName", NULL));
2369 if (dns_hostname == NULL) {
2370 return ldb_module_oom(ac->module);
2371 }
2372
2373 talloc_free(msg);
2374
2375 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn,
2376 dns_attrs, DSDB_FLAG_NEXT_MODULE, ac->req);
2377 if (ret == LDB_SUCCESS) {
2378 old_dns_hostname = ldb_msg_find_attr_as_string(res->msgs[0], "dNSHostName", NULL);
2379 }
2380 }
2381
2382 /* Create a temporary message for fetching the "sAMAccountName" */
2383 if (el2 != NULL) {
2384 char *tempstr, *tempstr2 = NULL;
2385 const char *acct_attrs[] = { "sAMAccountName", NULL };
2386
2387 msg = ldb_msg_new(ac->msg);
2388 if (msg == NULL) {
2389 return ldb_module_oom(ac->module);
2390 }
2391 ret = ldb_msg_add(msg, el2, 0);
2392 if (ret != LDB_SUCCESS) {
2393 return ret;
2394 }
2395 tempstr = talloc_strdup(ac,
2396 ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL));
2397 talloc_free(msg);
2398
2399 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, acct_attrs,
2400 DSDB_FLAG_NEXT_MODULE, ac->req);
2401 if (ret == LDB_SUCCESS) {
2402 tempstr2 = talloc_strdup(ac,
2403 ldb_msg_find_attr_as_string(res->msgs[0],
2404 "sAMAccountName", NULL));
2405 }
2406
2407
2408 /* The "sAMAccountName" needs some additional trimming: we need
2409 * to remove the trailing "$"s if they exist. */
2410 if ((tempstr != NULL) && (tempstr[0] != '\0') &&
2411 (tempstr[strlen(tempstr) - 1] == '$')) {
2412 tempstr[strlen(tempstr) - 1] = '\0';
2413 }
2414 if ((tempstr2 != NULL) && (tempstr2[0] != '\0') &&
2415 (tempstr2[strlen(tempstr2) - 1] == '$')) {
2416 tempstr2[strlen(tempstr2) - 1] = '\0';
2417 }
2418 sam_accountname = tempstr;
2419 old_sam_accountname = tempstr2;
2420 }
2421
2422 if (old_dns_hostname == NULL) {
2423 /* we cannot change when the old name is unknown */
2424 dns_hostname = NULL;
2425 }
2426 if ((old_dns_hostname != NULL) && (dns_hostname != NULL) &&
2427 (strcasecmp_m(old_dns_hostname, dns_hostname) == 0)) {
2428 /* The "dNSHostName" didn't change */
2429 dns_hostname = NULL;
2430 }
2431
2432 if (old_sam_accountname == NULL) {
2433 /* we cannot change when the old name is unknown */
2434 sam_accountname = NULL;
2435 }
2436 if ((old_sam_accountname != NULL) && (sam_accountname != NULL) &&
2437 (strcasecmp_m(old_sam_accountname, sam_accountname) == 0)) {
2438 /* The "sAMAccountName" didn't change */
2439 sam_accountname = NULL;
2440 }
2441
2442 if ((dns_hostname == NULL) && (sam_accountname == NULL)) {
2443 /* Well, there are information missing (old name(s)) or the
2444 * names didn't change. We've nothing to do and can exit here */
2445 return LDB_SUCCESS;
2446 }
2447
2448 /* Potential "servicePrincipalName" changes in the same request have to
2449 * be handled before the update (Windows behaviour). */
2450 el = ldb_msg_find_element(ac->msg, "servicePrincipalName");
2451 if (el != NULL) {
2452 msg = ldb_msg_new(ac->msg);
2453 if (msg == NULL) {
2454 return ldb_module_oom(ac->module);
2455 }
2456 msg->dn = ac->msg->dn;
2457
2458 do {
2459 ret = ldb_msg_add(msg, el, el->flags);
2460 if (ret != LDB_SUCCESS) {
2461 return ret;
2462 }
2463
2464 ldb_msg_remove_element(ac->msg, el);
2465
2466 el = ldb_msg_find_element(ac->msg,
2467 "servicePrincipalName");
2468 } while (el != NULL);
2469
2470 ret = dsdb_module_modify(ac->module, msg,
2471 DSDB_FLAG_NEXT_MODULE, ac->req);
2472 if (ret != LDB_SUCCESS) {
2473 return ret;
2474 }
2475 talloc_free(msg);
2476 }
2477
2478 /* Fetch the "servicePrincipalName"s if any */
2479 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
2480 DSDB_FLAG_NEXT_MODULE, ac->req, NULL);
2481 if (ret != LDB_SUCCESS) {
2482 return ret;
2483 }
2484 if ((res->count != 1) || (res->msgs[0]->num_elements > 1)) {
2485 return ldb_operr(ldb);
2486 }
2487
2488 if (res->msgs[0]->num_elements == 1) {
2489 /*
2490 * Yes, we do have "servicePrincipalName"s. First we update them
2491 * locally, that means we do always substitute the current
2492 * "dNSHostName" with the new one and/or "sAMAccountName"
2493 * without "$" with the new one and then we append the
2494 * modified "servicePrincipalName"s as a message element
2495 * replace to the modification request (Windows behaviour). We
2496 * need also to make sure that the values remain case-
2497 * insensitively unique.
2498 */
2499
2500 ret = ldb_msg_add_empty(ac->msg, "servicePrincipalName",
2501 LDB_FLAG_MOD_REPLACE, &el);
2502 if (ret != LDB_SUCCESS) {
2503 return ret;
2504 }
2505
2506 for (i = 0; i < res->msgs[0]->elements[0].num_values; i++) {
2507 char *old_str, *new_str, *pos;
2508 const char *tok;
2509 struct ldb_val *vals;
2510 bool found = false;
2511
2512 old_str = (char *)
2513 res->msgs[0]->elements[0].values[i].data;
2514
2515 new_str = talloc_strdup(ac->msg,
2516 strtok_r(old_str, "/", &pos));
2517 if (new_str == NULL) {
2518 return ldb_module_oom(ac->module);
2519 }
2520
2521 while ((tok = strtok_r(NULL, "/", &pos)) != NULL) {
2522 if ((dns_hostname != NULL) &&
2523 (strcasecmp_m(tok, old_dns_hostname) == 0)) {
2524 tok = dns_hostname;
2525 }
2526 if ((sam_accountname != NULL) &&
2527 (strcasecmp_m(tok, old_sam_accountname) == 0)) {
2528 tok = sam_accountname;
2529 }
2530
2531 new_str = talloc_asprintf(ac->msg, "%s/%s",
2532 new_str, tok);
2533 if (new_str == NULL) {
2534 return ldb_module_oom(ac->module);
2535 }
2536 }
2537
2538 /* Uniqueness check */
2539 for (j = 0; (!found) && (j < el->num_values); j++) {
2540 if (strcasecmp_m((char *)el->values[j].data,
2541 new_str) == 0) {
2542 found = true;
2543 }
2544 }
2545 if (found) {
2546 continue;
2547 }
2548
2549 /*
2550 * append the new "servicePrincipalName" -
2551 * code derived from ldb_msg_add_value().
2552 *
2553 * Open coded to make it clear that we must
2554 * append to the MOD_REPLACE el created above.
2555 */
2556 vals = talloc_realloc(ac->msg, el->values,
2557 struct ldb_val,
2558 el->num_values + 1);
2559 if (vals == NULL) {
2560 return ldb_module_oom(ac->module);
2561 }
2562 el->values = vals;
2563 el->values[el->num_values] = data_blob_string_const(new_str);
2564 ++(el->num_values);
2565 }
2566 }
2567
2568 talloc_free(res);
2569
2570 return LDB_SUCCESS;
2571 }
2572
2573 /* This checks the "fSMORoleOwner" attributes */
2574 static int samldb_fsmo_role_owner_check(struct samldb_ctx *ac)
2575 {
2576 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2577 const char * const no_attrs[] = { NULL };
2578 struct ldb_message_element *el;
2579 struct ldb_message *tmp_msg;
2580 struct ldb_dn *res_dn;
2581 struct ldb_result *res;
2582 int ret;
2583
2584 el = dsdb_get_single_valued_attr(ac->msg, "fSMORoleOwner",
2585 ac->req->operation);
2586 if (el == NULL) {
2587 /* we are not affected */
2588 return LDB_SUCCESS;
2589 }
2590
2591 /* Create a temporary message for fetching the "fSMORoleOwner" */
2592 tmp_msg = ldb_msg_new(ac->msg);
2593 if (tmp_msg == NULL) {
2594 return ldb_module_oom(ac->module);
2595 }
2596 ret = ldb_msg_add(tmp_msg, el, 0);
2597 if (ret != LDB_SUCCESS) {
2598 return ret;
2599 }
2600 res_dn = ldb_msg_find_attr_as_dn(ldb, ac, tmp_msg, "fSMORoleOwner");
2601 talloc_free(tmp_msg);
2602
2603 if (res_dn == NULL) {
2604 ldb_set_errstring(ldb,
2605 "samldb: 'fSMORoleOwner' attributes have to reference 'nTDSDSA' entries!");
2606 if (ac->req->operation == LDB_ADD) {
2607 return LDB_ERR_CONSTRAINT_VIOLATION;
2608 } else {
2609 return LDB_ERR_UNWILLING_TO_PERFORM;
2610 }
2611 }
2612
2613 /* Fetched DN has to reference a "nTDSDSA" entry */
2614 ret = dsdb_module_search(ac->module, ac, &res, res_dn, LDB_SCOPE_BASE,
2615 no_attrs,
2616 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
2617 ac->req, "(objectClass=nTDSDSA)");
2618 if (ret != LDB_SUCCESS) {
2619 return ret;
2620 }
2621 if (res->count != 1) {
2622 ldb_set_errstring(ldb,
2623 "samldb: 'fSMORoleOwner' attributes have to reference 'nTDSDSA' entries!");
2624 return LDB_ERR_UNWILLING_TO_PERFORM;
2625 }
2626
2627 talloc_free(res);
2628
2629 return LDB_SUCCESS;
2630 }
2631
2632
2633 /* add */
2634 static int samldb_add(struct ldb_module *module, struct ldb_request *req)
2635 {
2636 struct ldb_context *ldb;
2637 struct samldb_ctx *ac;
2638 struct ldb_message_element *el;
2639 int ret;
2640
2641 ldb = ldb_module_get_ctx(module);
2642 ldb_debug(ldb, LDB_DEBUG_TRACE, "samldb_add\n");
2643
2644 /* do not manipulate our control entries */
2645 if (ldb_dn_is_special(req->op.add.message->dn)) {
2646 return ldb_next_request(module, req);
2647 }
2648
2649 el = ldb_msg_find_element(req->op.add.message, "userParameters");
2650 if (el != NULL && ldb_req_is_untrusted(req)) {
2651 const char *reason = "samldb_add: "
2652 "setting userParameters is not supported over LDAP, "
2653 "see https://bugzilla.samba.org/show_bug.cgi?id=8077";
2654 ldb_debug(ldb, LDB_DEBUG_WARNING, "%s", reason);
2655 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, reason);
2656 }
2657
2658 ac = samldb_ctx_init(module, req);
2659 if (ac == NULL) {
2660 return ldb_operr(ldb);
2661 }
2662
2663 /* build the new msg */
2664 ac->msg = ldb_msg_copy_shallow(ac, req->op.add.message);
2665 if (ac->msg == NULL) {
2666 talloc_free(ac);
2667 ldb_debug(ldb, LDB_DEBUG_FATAL,
2668 "samldb_add: ldb_msg_copy_shallow failed!\n");
2669 return ldb_operr(ldb);
2670 }
2671
2672 el = ldb_msg_find_element(ac->msg, "fSMORoleOwner");
2673 if (el != NULL) {
2674 ret = samldb_fsmo_role_owner_check(ac);
2675 if (ret != LDB_SUCCESS) {
2676 return ret;
2677 }
2678 }
2679
2680 if (samdb_find_attribute(ldb, ac->msg,
2681 "objectclass", "user") != NULL) {
2682 ac->type = SAMLDB_TYPE_USER;
2683
2684 ret = samldb_prim_group_trigger(ac);
2685 if (ret != LDB_SUCCESS) {
2686 return ret;
2687 }
2688
2689 ret = samldb_objectclass_trigger(ac);
2690 if (ret != LDB_SUCCESS) {
2691 return ret;
2692 }
2693
2694 return samldb_fill_object(ac);
2695 }
2696
2697 if (samdb_find_attribute(ldb, ac->msg,
2698 "objectclass", "group") != NULL) {
2699 ac->type = SAMLDB_TYPE_GROUP;
2700
2701 ret = samldb_objectclass_trigger(ac);
2702 if (ret != LDB_SUCCESS) {
2703 return ret;
2704 }
2705
2706 return samldb_fill_object(ac);
2707 }
2708
2709 /* perhaps a foreignSecurityPrincipal? */
2710 if (samdb_find_attribute(ldb, ac->msg,
2711 "objectclass",
2712 "foreignSecurityPrincipal") != NULL) {
2713 return samldb_fill_foreignSecurityPrincipal_object(ac);
2714 }
2715
2716 if (samdb_find_attribute(ldb, ac->msg,
2717 "objectclass", "classSchema") != NULL) {
2718 ret = samldb_schema_info_update(ac);
2719 if (ret != LDB_SUCCESS) {
2720 talloc_free(ac);
2721 return ret;
2722 }
2723
2724 ac->type = SAMLDB_TYPE_CLASS;
2725 return samldb_fill_object(ac);
2726 }
2727
2728 if (samdb_find_attribute(ldb, ac->msg,
2729 "objectclass", "attributeSchema") != NULL) {
2730 ret = samldb_schema_info_update(ac);
2731 if (ret != LDB_SUCCESS) {
2732 talloc_free(ac);
2733 return ret;
2734 }
2735
2736 ac->type = SAMLDB_TYPE_ATTRIBUTE;
2737 return samldb_fill_object(ac);
2738 }
2739
2740 talloc_free(ac);
2741
2742 /* nothing matched, go on */
2743 return ldb_next_request(module, req);
2744 }
2745
2746 /* modify */
2747 static int samldb_modify(struct ldb_module *module, struct ldb_request *req)
2748 {
2749 struct ldb_context *ldb;
2750 struct samldb_ctx *ac;
2751 struct ldb_message_element *el, *el2;
2752 bool modified = false;
2753 int ret;
2754
2755 if (ldb_dn_is_special(req->op.mod.message->dn)) {
2756 /* do not manipulate our control entries */
2757 return ldb_next_request(module, req);
2758 }
2759
2760 ldb = ldb_module_get_ctx(module);
2761
2762 /* make sure that "objectSid" is not specified */
2763 el = ldb_msg_find_element(req->op.mod.message, "objectSid");
2764 if (el != NULL) {
2765 if (ldb_request_get_control(req, LDB_CONTROL_PROVISION_OID) == NULL) {
2766 ldb_set_errstring(ldb,
2767 "samldb: objectSid must not be specified!");
2768 return LDB_ERR_UNWILLING_TO_PERFORM;
2769 }
2770 }
2771 /* make sure that "sAMAccountType" is not specified */
2772 el = ldb_msg_find_element(req->op.mod.message, "sAMAccountType");
2773 if (el != NULL) {
2774 ldb_set_errstring(ldb,
2775 "samldb: sAMAccountType must not be specified!");
2776 return LDB_ERR_UNWILLING_TO_PERFORM;
2777 }
2778 /* make sure that "isCriticalSystemObject" is not specified */
2779 el = ldb_msg_find_element(req->op.mod.message, "isCriticalSystemObject");
2780 if (el != NULL) {
2781 if (ldb_request_get_control(req, LDB_CONTROL_RELAX_OID) == NULL) {
2782 ldb_set_errstring(ldb,
2783 "samldb: isCriticalSystemObject must not be specified!");
2784 return LDB_ERR_UNWILLING_TO_PERFORM;
2785 }
2786 }
2787
2788 /* msDS-IntId is not allowed to be modified
2789 * except when modification comes from replication */
2790 if (ldb_msg_find_element(req->op.mod.message, "msDS-IntId")) {
2791 if (!ldb_request_get_control(req,
2792 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
2793 return LDB_ERR_CONSTRAINT_VIOLATION;
2794 }
2795 }
2796
2797 el = ldb_msg_find_element(req->op.mod.message, "userParameters");
2798 if (el != NULL && ldb_req_is_untrusted(req)) {
2799 const char *reason = "samldb: "
2800 "setting userParameters is not supported over LDAP, "
2801 "see https://bugzilla.samba.org/show_bug.cgi?id=8077";
2802 ldb_debug(ldb, LDB_DEBUG_WARNING, "%s", reason);
2803 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, reason);
2804 }
2805
2806 ac = samldb_ctx_init(module, req);
2807 if (ac == NULL) {
2808 return ldb_operr(ldb);
2809 }
2810
2811 /* build the new msg */
2812 ac->msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
2813 if (ac->msg == NULL) {
2814 talloc_free(ac);
2815 ldb_debug(ldb, LDB_DEBUG_FATAL,
2816 "samldb_modify: ldb_msg_copy_shallow failed!\n");
2817 return ldb_operr(ldb);
2818 }
2819
2820 el = ldb_msg_find_element(ac->msg, "primaryGroupID");
2821 if (el != NULL) {
2822 ret = samldb_prim_group_trigger(ac);
2823 if (ret != LDB_SUCCESS) {
2824 return ret;
2825 }
2826 }
2827
2828 el = ldb_msg_find_element(ac->msg, "userAccountControl");
2829 if (el != NULL) {
2830 modified = true;
2831 ret = samldb_user_account_control_change(ac);
2832 if (ret != LDB_SUCCESS) {
2833 return ret;
2834 }
2835 }
2836
2837 el = ldb_msg_find_element(ac->msg, "lockoutTime");
2838 if (el != NULL) {
2839 modified = true;
2840 ret = samldb_lockout_time(ac);
2841 if (ret != LDB_SUCCESS) {
2842 return ret;
2843 }
2844 }
2845
2846 el = ldb_msg_find_element(ac->msg, "groupType");
2847 if (el != NULL) {
2848 modified = true;
2849 ret = samldb_group_type_change(ac);
2850 if (ret != LDB_SUCCESS) {
2851 return ret;
2852 }
2853 }
2854
2855 el = ldb_msg_find_element(ac->msg, "sAMAccountName");
2856 if (el != NULL) {
2857 ret = samldb_sam_accountname_check(ac);
2858 if (ret != LDB_SUCCESS) {
2859 return ret;
2860 }
2861 }
2862
2863 el = ldb_msg_find_element(ac->msg, "member");
2864 if (el != NULL) {
2865 ret = samldb_member_check(ac);
2866 if (ret != LDB_SUCCESS) {
2867 return ret;
2868 }
2869 }
2870
2871 el = ldb_msg_find_element(ac->msg, "description");
2872 if (el != NULL) {
2873 ret = samldb_description_check(ac, &modified);
2874 if (ret != LDB_SUCCESS) {
2875 return ret;
2876 }
2877 }
2878
2879 el = ldb_msg_find_element(ac->msg, "dNSHostName");
2880 el2 = ldb_msg_find_element(ac->msg, "sAMAccountName");
2881 if ((el != NULL) || (el2 != NULL)) {
2882 modified = true;
2883 ret = samldb_service_principal_names_change(ac);
2884 if (ret != LDB_SUCCESS) {
2885 return ret;
2886 }
2887 }
2888
2889 el = ldb_msg_find_element(ac->msg, "fSMORoleOwner");
2890 if (el != NULL) {
2891 ret = samldb_fsmo_role_owner_check(ac);
2892 if (ret != LDB_SUCCESS) {
2893 return ret;
2894 }
2895 }
2896
2897 if (modified) {
2898 struct ldb_request *child_req;
2899
2900 /* Now perform the real modifications as a child request */
2901 ret = ldb_build_mod_req(&child_req, ldb, ac,
2902 ac->msg,
2903 req->controls,
2904 req, dsdb_next_callback,
2905 req);
2906 LDB_REQ_SET_LOCATION(child_req);
2907 if (ret != LDB_SUCCESS) {
2908 return ret;
2909 }
2910
2911 return ldb_next_request(module, child_req);
2912 }
2913
2914 talloc_free(ac);
2915
2916 /* no change which interests us, go on */
2917 return ldb_next_request(module, req);
2918 }
2919
2920 /* delete */
2921
2922 static int samldb_prim_group_users_check(struct samldb_ctx *ac)
2923 {
2924 struct ldb_context *ldb;
2925 struct dom_sid *sid;
2926 uint32_t rid;
2927 NTSTATUS status;
2928 int ret;
2929 struct ldb_result *res;
2930 const char * const attrs[] = { "objectSid", "isDeleted", NULL };
2931 const char * const noattrs[] = { NULL };
2932
2933 ldb = ldb_module_get_ctx(ac->module);
2934
2935 /* Finds out the SID/RID of the SAM object */
2936 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->req->op.del.dn,
2937 attrs,
2938 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
2939 ac->req);
2940 if (ret != LDB_SUCCESS) {
2941 return ret;
2942 }
2943
2944 if (ldb_msg_check_string_attribute(res->msgs[0], "isDeleted", "TRUE")) {
2945 return LDB_SUCCESS;
2946 }
2947
2948 sid = samdb_result_dom_sid(ac, res->msgs[0], "objectSid");
2949 if (sid == NULL) {
2950 /* No SID - it might not be a SAM object - therefore ok */
2951 return LDB_SUCCESS;
2952 }
2953 status = dom_sid_split_rid(ac, sid, NULL, &rid);
2954 if (!NT_STATUS_IS_OK(status)) {
2955 return ldb_operr(ldb);
2956 }
2957 if (rid == 0) {
2958 /* Special object (security principal?) */
2959 return LDB_SUCCESS;
2960 }
2961 /* do not allow deletion of well-known sids */
2962 if (rid < DSDB_SAMDB_MINIMUM_ALLOWED_RID &&
2963 (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) == NULL)) {
2964 return LDB_ERR_OTHER;
2965 }
2966
2967 /* Deny delete requests from groups which are primary ones */
2968 ret = dsdb_module_search(ac->module, ac, &res,
2969 ldb_get_default_basedn(ldb),
2970 LDB_SCOPE_SUBTREE, noattrs,
2971 DSDB_FLAG_NEXT_MODULE,
2972 ac->req,
2973 "(&(primaryGroupID=%u)(objectClass=user))", rid);
2974 if (ret != LDB_SUCCESS) {
2975 return ret;
2976 }
2977 if (res->count > 0) {
2978 return LDB_ERR_ENTRY_ALREADY_EXISTS;
2979 }
2980
2981 return LDB_SUCCESS;
2982 }
2983
2984 static int samldb_delete(struct ldb_module *module, struct ldb_request *req)
2985 {
2986 struct samldb_ctx *ac;
2987 int ret;
2988
2989 if (ldb_dn_is_special(req->op.del.dn)) {
2990 /* do not manipulate our control entries */
2991 return ldb_next_request(module, req);
2992 }
2993
2994 ac = samldb_ctx_init(module, req);
2995 if (ac == NULL) {
2996 return ldb_operr(ldb_module_get_ctx(module));
2997 }
2998
2999 ret = samldb_prim_group_users_check(ac);
3000 if (ret != LDB_SUCCESS) {
3001 return ret;
3002 }
3003
3004 talloc_free(ac);
3005
3006 return ldb_next_request(module, req);
3007 }
3008
3009 /* rename */
3010
3011 static int check_rename_constraints(struct ldb_message *msg,
3012 struct samldb_ctx *ac,
3013 struct ldb_dn *olddn, struct ldb_dn *newdn)
3014 {
3015 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
3016 struct ldb_dn *dn1, *dn2, *nc_root;
3017 int32_t systemFlags;
3018 bool move_op = false;
3019 bool rename_op = false;
3020 int ret;
3021
3022 /* Skip the checks if old and new DN are the same, or if we have the
3023 * relax control specified or if the returned objects is already
3024 * deleted and needs only to be moved for consistency. */
3025
3026 if (ldb_dn_compare(olddn, newdn) == 0) {
3027 return LDB_SUCCESS;
3028 }
3029 if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) != NULL) {
3030 return LDB_SUCCESS;
3031 }
3032 if (ldb_msg_find_attr_as_bool(msg, "isDeleted", false)) {
3033 return LDB_SUCCESS;
3034 }
3035
3036 /* Objects under CN=System */
3037
3038 dn1 = ldb_dn_copy(ac, ldb_get_default_basedn(ldb));
3039 if (dn1 == NULL) return ldb_oom(ldb);
3040
3041 if ( ! ldb_dn_add_child_fmt(dn1, "CN=System")) {
3042 talloc_free(dn1);
3043 return LDB_ERR_OPERATIONS_ERROR;
3044 }
3045
3046 if ((ldb_dn_compare_base(dn1, olddn) == 0) &&
3047 (ldb_dn_compare_base(dn1, newdn) != 0)) {
3048 talloc_free(dn1);
3049 ldb_asprintf_errstring(ldb,
3050 "subtree_rename: Cannot move/rename %s. Objects under CN=System have to stay under it!",
3051 ldb_dn_get_linearized(olddn));
3052 return LDB_ERR_OTHER;
3053 }
3054
3055 talloc_free(dn1);
3056
3057 /* LSA objects */
3058
3059 if ((samdb_find_attribute(ldb, msg, "objectClass", "secret") != NULL) ||
3060 (samdb_find_attribute(ldb, msg, "objectClass", "trustedDomain") != NULL)) {
3061 ldb_asprintf_errstring(ldb,
3062 "subtree_rename: Cannot move/rename %s. It's an LSA-specific object!",
3063 ldb_dn_get_linearized(olddn));
3064 return LDB_ERR_UNWILLING_TO_PERFORM;
3065 }
3066
3067 /* systemFlags */
3068
3069 dn1 = ldb_dn_get_parent(ac, olddn);
3070 if (dn1 == NULL) return ldb_oom(ldb);
3071 dn2 = ldb_dn_get_parent(ac, newdn);
3072 if (dn2 == NULL) return ldb_oom(ldb);
3073
3074 if (ldb_dn_compare(dn1, dn2) == 0) {
3075 rename_op = true;
3076 } else {
3077 move_op = true;
3078 }
3079
3080 talloc_free(dn1);
3081 talloc_free(dn2);
3082
3083 systemFlags = ldb_msg_find_attr_as_int(msg, "systemFlags", 0);
3084
3085 /* Fetch name context */
3086
3087 ret = dsdb_find_nc_root(ldb, ac, olddn, &nc_root);
3088 if (ret != LDB_SUCCESS) {
3089 return ret;
3090 }
3091
3092 if (ldb_dn_compare(nc_root, ldb_get_schema_basedn(ldb)) == 0) {
3093 if (move_op) {
3094 ldb_asprintf_errstring(ldb,
3095 "subtree_rename: Cannot move %s within schema partition",
3096 ldb_dn_get_linearized(olddn));
3097 return LDB_ERR_UNWILLING_TO_PERFORM;
3098 }
3099 if (rename_op &&
3100 (systemFlags & SYSTEM_FLAG_SCHEMA_BASE_OBJECT) != 0) {
3101 ldb_asprintf_errstring(ldb,
3102 "subtree_rename: Cannot rename %s within schema partition",
3103 ldb_dn_get_linearized(olddn));
3104 return LDB_ERR_UNWILLING_TO_PERFORM;
3105 }
3106 } else if (ldb_dn_compare(nc_root, ldb_get_config_basedn(ldb)) == 0) {
3107 if (move_op &&
3108 (systemFlags & SYSTEM_FLAG_CONFIG_ALLOW_MOVE) == 0) {
3109 /* Here we have to do more: control the
3110 * "ALLOW_LIMITED_MOVE" flag. This means that the
3111 * grand-grand-parents of two objects have to be equal
3112 * in order to perform the move (this is used for
3113 * moving "server" objects in the "sites" container). */
3114 bool limited_move =
3115 systemFlags & SYSTEM_FLAG_CONFIG_ALLOW_LIMITED_MOVE;
3116
3117 if (limited_move) {
3118 dn1 = ldb_dn_copy(ac, olddn);
3119 if (dn1 == NULL) return ldb_oom(ldb);
3120 dn2 = ldb_dn_copy(ac, newdn);
3121 if (dn2 == NULL) return ldb_oom(ldb);
3122
3123 limited_move &= ldb_dn_remove_child_components(dn1, 3);
3124 limited_move &= ldb_dn_remove_child_components(dn2, 3);
3125 limited_move &= ldb_dn_compare(dn1, dn2) == 0;
3126
3127 talloc_free(dn1);
3128 talloc_free(dn2);
3129 }
3130
3131 if (!limited_move) {
3132 ldb_asprintf_errstring(ldb,
3133 "subtree_rename: Cannot move %s to %s in config partition",
3134 ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
3135 return LDB_ERR_UNWILLING_TO_PERFORM;
3136 }
3137 }
3138 if (rename_op &&
3139 (systemFlags & SYSTEM_FLAG_CONFIG_ALLOW_RENAME) == 0) {
3140 ldb_asprintf_errstring(ldb,
3141 "subtree_rename: Cannot rename %s to %s within config partition",
3142 ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
3143 return LDB_ERR_UNWILLING_TO_PERFORM;
3144 }
3145 } else if (ldb_dn_compare(nc_root, ldb_get_default_basedn(ldb)) == 0) {
3146 if (move_op &&
3147 (systemFlags & SYSTEM_FLAG_DOMAIN_DISALLOW_MOVE) != 0) {
3148 ldb_asprintf_errstring(ldb,
3149 "subtree_rename: Cannot move %s to %s - DISALLOW_MOVE set",
3150 ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
3151 return LDB_ERR_UNWILLING_TO_PERFORM;
3152 }
3153 if (rename_op &&
3154 (systemFlags & SYSTEM_FLAG_DOMAIN_DISALLOW_RENAME) != 0) {
3155 ldb_asprintf_errstring(ldb,
3156 "subtree_rename: Cannot rename %s to %s - DISALLOW_RENAME set",
3157 ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
3158 return LDB_ERR_UNWILLING_TO_PERFORM;
3159 }
3160 }
3161
3162 talloc_free(nc_root);
3163
3164 return LDB_SUCCESS;
3165 }
3166
3167
3168 static int samldb_rename_search_base_callback(struct ldb_request *req,
3169 struct ldb_reply *ares)
3170 {
3171 struct samldb_ctx *ac;
3172 int ret;
3173
3174 ac = talloc_get_type(req->context, struct samldb_ctx);
3175
3176 if (!ares) {
3177 return ldb_module_done(ac->req, NULL, NULL,
3178 LDB_ERR_OPERATIONS_ERROR);
3179 }
3180 if (ares->error != LDB_SUCCESS) {
3181 return ldb_module_done(ac->req, ares->controls,
3182 ares->response, ares->error);
3183 }
3184
3185 switch (ares->type) {
3186 case LDB_REPLY_ENTRY:
3187 /*
3188 * This is the root entry of the originating move
3189 * respectively rename request. It has been already
3190 * stored in the list using "subtree_rename_search()".
3191 * Only this one is subject to constraint checking.
3192 */
3193 ret = check_rename_constraints(ares->message, ac,
3194 ac->req->op.rename.olddn,
3195 ac->req->op.rename.newdn);
3196 if (ret != LDB_SUCCESS) {
3197 return ldb_module_done(ac->req, NULL, NULL,
3198 ret);
3199 }
3200 break;
3201
3202 case LDB_REPLY_REFERRAL:
3203 /* ignore */
3204 break;
3205
3206 case LDB_REPLY_DONE:
3207
3208 /*
3209 * Great, no problem with the rename, so go ahead as
3210 * if we never were here
3211 */
3212 ret = ldb_next_request(ac->module, ac->req);
3213 talloc_free(ares);
3214 return ret;
3215 }
3216
3217 talloc_free(ares);
3218 return LDB_SUCCESS;
3219 }
3220
3221
3222 /* rename */
3223 static int samldb_rename(struct ldb_module *module, struct ldb_request *req)
3224 {
3225 struct ldb_context *ldb;
3226 static const char * const attrs[] = { "objectClass", "systemFlags",
3227 "isDeleted", NULL };
3228 struct ldb_request *search_req;
3229 struct samldb_ctx *ac;
3230 int ret;
3231
3232 if (ldb_dn_is_special(req->op.rename.olddn)) { /* do not manipulate our control entries */
3233 return ldb_next_request(module, req);
3234 }
3235
3236 ldb = ldb_module_get_ctx(module);
3237
3238 ac = samldb_ctx_init(module, req);
3239 if (!ac) {
3240 return ldb_oom(ldb);
3241 }
3242
3243 ret = ldb_build_search_req(&search_req, ldb, ac,
3244 req->op.rename.olddn,
3245 LDB_SCOPE_BASE,
3246 "(objectClass=*)",
3247 attrs,
3248 NULL,
3249 ac,
3250 samldb_rename_search_base_callback,
3251 req);
3252 LDB_REQ_SET_LOCATION(search_req);
3253 if (ret != LDB_SUCCESS) {
3254 return ret;
3255 }
3256
3257 ret = ldb_request_add_control(search_req, LDB_CONTROL_SHOW_RECYCLED_OID,
3258 true, NULL);
3259 if (ret != LDB_SUCCESS) {
3260 return ret;
3261 }
3262
3263 return ldb_next_request(ac->module, search_req);
3264 }
3265
3266 /* extended */
3267
3268 static int samldb_extended_allocate_rid_pool(struct ldb_module *module, struct ldb_request *req)
3269 {
3270 struct ldb_context *ldb = ldb_module_get_ctx(module);
3271 struct dsdb_fsmo_extended_op *exop;
3272 int ret;
3273
3274 exop = talloc_get_type(req->op.extended.data,
3275 struct dsdb_fsmo_extended_op);
3276 if (!exop) {
3277 ldb_set_errstring(ldb,
3278 "samldb_extended_allocate_rid_pool: invalid extended data");
3279 return LDB_ERR_PROTOCOL_ERROR;
3280 }
3281
3282 ret = ridalloc_allocate_rid_pool_fsmo(module, exop, req);
3283 if (ret != LDB_SUCCESS) {
3284 return ret;
3285 }
3286
3287 return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
3288 }
3289
3290 static int samldb_extended(struct ldb_module *module, struct ldb_request *req)
3291 {
3292 if (strcmp(req->op.extended.oid, DSDB_EXTENDED_ALLOCATE_RID_POOL) == 0) {
3293 return samldb_extended_allocate_rid_pool(module, req);
3294 }
3295
3296 return ldb_next_request(module, req);
3297 }
3298
3299
3300 static const struct ldb_module_ops ldb_samldb_module_ops = {
3301 .name = "samldb",
3302 .add = samldb_add,
3303 .modify = samldb_modify,
3304 .del = samldb_delete,
3305 .rename = samldb_rename,
3306 .extended = samldb_extended
3307 };
3308
3309
3310 int ldb_samldb_module_init(const char *version)
3311 {
3312 LDB_MODULE_CHECK_VERSION(version);
3313 return ldb_register_module(&ldb_samldb_module_ops);
3314 }
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