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dsdb-samldb: Only allow known and settable userAccountControl bits to be set
[Samba.git] / source4 / dsdb / samdb / ldb_modules / samldb.c
blobf89e6814afee0ff9fc2f15e05ca57ec26c89dd98
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[] = {
1289 "primaryGroupID",
1290 "memberOf",
1291 "userAccountControl",
1292 NULL };
1293 struct ldb_result *res, *group_res;
1294 struct ldb_message_element *el;
1295 struct ldb_message *msg;
1296 uint32_t prev_rid, new_rid, uac;
1297 struct dom_sid *prev_sid, *new_sid;
1298 struct ldb_dn *prev_prim_group_dn, *new_prim_group_dn;
1299 int ret;
1300 const char * const noattrs[] = { NULL };
1301
1302 el = dsdb_get_single_valued_attr(ac->msg, "primaryGroupID",
1303 ac->req->operation);
1304 if (el == NULL) {
1305 /* we are not affected */
1306 return LDB_SUCCESS;
1307 }
1308
1309 /* Fetch information from the existing object */
1310
1311 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
1312 DSDB_FLAG_NEXT_MODULE, ac->req);
1313 if (ret != LDB_SUCCESS) {
1314 return ret;
1315 }
1316
1317 uac = ldb_msg_find_attr_as_uint(res->msgs[0], "userAccountControl", 0);
1318
1319 /* Finds out the DN of the old primary group */
1320
1321 prev_rid = ldb_msg_find_attr_as_uint(res->msgs[0], "primaryGroupID",
1322 (uint32_t) -1);
1323 if (prev_rid == (uint32_t) -1) {
1324 /* User objects do always have a mandatory "primaryGroupID"
1325 * attribute. If this doesn't exist then the object is of the
1326 * wrong type. This is the exact Windows error code */
1327 return LDB_ERR_OBJECT_CLASS_VIOLATION;
1328 }
1329
1330 prev_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), prev_rid);
1331 if (prev_sid == NULL) {
1332 return ldb_operr(ldb);
1333 }
1334
1335 /* Finds out the DN of the new primary group
1336 * Notice: in order to parse the primary group ID correctly we create
1337 * a temporary message here. */
1338
1339 msg = ldb_msg_new(ac->msg);
1340 if (msg == NULL) {
1341 return ldb_module_oom(ac->module);
1342 }
1343 ret = ldb_msg_add(msg, el, 0);
1344 if (ret != LDB_SUCCESS) {
1345 return ret;
1346 }
1347 new_rid = ldb_msg_find_attr_as_uint(msg, "primaryGroupID", (uint32_t) -1);
1348 talloc_free(msg);
1349 if (new_rid == (uint32_t) -1) {
1350 /* we aren't affected of any primary group change */
1351 return LDB_SUCCESS;
1352 }
1353
1354 if (prev_rid == new_rid) {
1355 return LDB_SUCCESS;
1356 }
1357
1358 if ((uac & UF_SERVER_TRUST_ACCOUNT) && new_rid != DOMAIN_RID_DCS) {
1359 ldb_asprintf_errstring(ldb,
1360 "%08X: samldb: UF_SERVER_TRUST_ACCOUNT requires "
1361 "primaryGroupID=%u!",
1362 W_ERROR_V(WERR_DS_CANT_MOD_PRIMARYGROUPID),
1363 DOMAIN_RID_DCS);
1364 return LDB_ERR_UNWILLING_TO_PERFORM;
1365 }
1366
1367 if ((uac & UF_PARTIAL_SECRETS_ACCOUNT) && new_rid != DOMAIN_RID_READONLY_DCS) {
1368 ldb_asprintf_errstring(ldb,
1369 "%08X: samldb: UF_PARTIAL_SECRETS_ACCOUNT requires "
1370 "primaryGroupID=%u!",
1371 W_ERROR_V(WERR_DS_CANT_MOD_PRIMARYGROUPID),
1372 DOMAIN_RID_READONLY_DCS);
1373 return LDB_ERR_UNWILLING_TO_PERFORM;
1374 }
1375
1376 ret = dsdb_module_search(ac->module, ac, &group_res,
1377 ldb_get_default_basedn(ldb),
1378 LDB_SCOPE_SUBTREE,
1379 noattrs, DSDB_FLAG_NEXT_MODULE,
1380 ac->req,
1381 "(objectSid=%s)",
1382 ldap_encode_ndr_dom_sid(ac, prev_sid));
1383 if (ret != LDB_SUCCESS) {
1384 return ret;
1385 }
1386 if (group_res->count != 1) {
1387 return ldb_operr(ldb);
1388 }
1389 prev_prim_group_dn = group_res->msgs[0]->dn;
1390
1391 new_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), new_rid);
1392 if (new_sid == NULL) {
1393 return ldb_operr(ldb);
1394 }
1395
1396 ret = dsdb_module_search(ac->module, ac, &group_res,
1397 ldb_get_default_basedn(ldb),
1398 LDB_SCOPE_SUBTREE,
1399 noattrs, DSDB_FLAG_NEXT_MODULE,
1400 ac->req,
1401 "(objectSid=%s)",
1402 ldap_encode_ndr_dom_sid(ac, new_sid));
1403 if (ret != LDB_SUCCESS) {
1404 return ret;
1405 }
1406 if (group_res->count != 1) {
1407 /* Here we know if the specified new primary group candidate is
1408 * valid or not. */
1409 return LDB_ERR_UNWILLING_TO_PERFORM;
1410 }
1411 new_prim_group_dn = group_res->msgs[0]->dn;
1412
1413 /* We need to be already a normal member of the new primary
1414 * group in order to be successful. */
1415 el = samdb_find_attribute(ldb, res->msgs[0], "memberOf",
1416 ldb_dn_get_linearized(new_prim_group_dn));
1417 if (el == NULL) {
1418 return LDB_ERR_UNWILLING_TO_PERFORM;
1419 }
1420
1421 /* Remove the "member" attribute on the new primary group */
1422 msg = ldb_msg_new(ac->msg);
1423 if (msg == NULL) {
1424 return ldb_module_oom(ac->module);
1425 }
1426 msg->dn = new_prim_group_dn;
1427
1428 ret = samdb_msg_add_delval(ldb, msg, msg, "member",
1429 ldb_dn_get_linearized(ac->msg->dn));
1430 if (ret != LDB_SUCCESS) {
1431 return ret;
1432 }
1433
1434 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
1435 if (ret != LDB_SUCCESS) {
1436 return ret;
1437 }
1438 talloc_free(msg);
1439
1440 /* Add a "member" attribute for the previous primary group */
1441 msg = ldb_msg_new(ac->msg);
1442 if (msg == NULL) {
1443 return ldb_module_oom(ac->module);
1444 }
1445 msg->dn = prev_prim_group_dn;
1446
1447 ret = samdb_msg_add_addval(ldb, msg, msg, "member",
1448 ldb_dn_get_linearized(ac->msg->dn));
1449 if (ret != LDB_SUCCESS) {
1450 return ret;
1451 }
1452
1453 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
1454 if (ret != LDB_SUCCESS) {
1455 return ret;
1456 }
1457 talloc_free(msg);
1458
1459 return LDB_SUCCESS;
1460 }
1461
1462 static int samldb_prim_group_trigger(struct samldb_ctx *ac)
1463 {
1464 int ret;
1465
1466 if (ac->req->operation == LDB_ADD) {
1467 ret = samldb_prim_group_set(ac);
1468 } else {
1469 ret = samldb_prim_group_change(ac);
1470 }
1471
1472 return ret;
1473 }
1474
1475 static int samldb_check_user_account_control_invariants(struct samldb_ctx *ac,
1476 uint32_t user_account_control)
1477 {
1478 int i, ret = 0;
1479 bool need_check = false;
1480 const struct uac_to_guid {
1481 uint32_t uac;
1482 bool never;
1483 uint32_t needs;
1484 uint32_t not_with;
1485 const char *error_string;
1486 } map[] = {
1487 {
1488 .uac = UF_TEMP_DUPLICATE_ACCOUNT,
1489 .never = true,
1490 .error_string = "Updating the UF_TEMP_DUPLICATE_ACCOUNT flag is never allowed"
1491 },
1492 {
1493 .uac = UF_PARTIAL_SECRETS_ACCOUNT,
1494 .needs = UF_WORKSTATION_TRUST_ACCOUNT,
1495 .error_string = "Setting UF_PARTIAL_SECRETS_ACCOUNT only permitted with UF_WORKSTATION_TRUST_ACCOUNT"
1496 },
1497 {
1498 .uac = UF_TRUSTED_FOR_DELEGATION,
1499 .not_with = UF_PARTIAL_SECRETS_ACCOUNT,
1500 .error_string = "Setting UF_TRUSTED_FOR_DELEGATION not allowed with UF_PARTIAL_SECRETS_ACCOUNT"
1501 },
1502 {
1503 .uac = UF_NORMAL_ACCOUNT,
1504 .not_with = UF_ACCOUNT_TYPE_MASK & ~UF_NORMAL_ACCOUNT,
1505 .error_string = "Setting more than one account type not permitted"
1506 },
1507 {
1508 .uac = UF_WORKSTATION_TRUST_ACCOUNT,
1509 .not_with = UF_ACCOUNT_TYPE_MASK & ~UF_WORKSTATION_TRUST_ACCOUNT,
1510 .error_string = "Setting more than one account type not permitted"
1511 },
1512 {
1513 .uac = UF_INTERDOMAIN_TRUST_ACCOUNT,
1514 .not_with = UF_ACCOUNT_TYPE_MASK & ~UF_INTERDOMAIN_TRUST_ACCOUNT,
1515 .error_string = "Setting more than one account type not permitted"
1516 },
1517 {
1518 .uac = UF_SERVER_TRUST_ACCOUNT,
1519 .not_with = UF_ACCOUNT_TYPE_MASK & ~UF_SERVER_TRUST_ACCOUNT,
1520 .error_string = "Setting more than one account type not permitted"
1521 },
1522 {
1523 .uac = UF_TRUSTED_FOR_DELEGATION,
1524 .not_with = UF_PARTIAL_SECRETS_ACCOUNT,
1525 .error_string = "Setting UF_TRUSTED_FOR_DELEGATION not allowed with UF_PARTIAL_SECRETS_ACCOUNT"
1526 }
1527 };
1528
1529 for (i = 0; i < ARRAY_SIZE(map); i++) {
1530 if (user_account_control & map[i].uac) {
1531 need_check = true;
1532 break;
1533 }
1534 }
1535 if (need_check == false) {
1536 return LDB_SUCCESS;
1537 }
1538
1539 for (i = 0; i < ARRAY_SIZE(map); i++) {
1540 uint32_t this_uac = user_account_control & map[i].uac;
1541 if (this_uac != 0) {
1542 if (map[i].never) {
1543 ret = LDB_ERR_OTHER;
1544 break;
1545 } else if (map[i].needs != 0) {
1546 if ((map[i].needs & user_account_control) == 0) {
1547 ret = LDB_ERR_OTHER;
1548 break;
1549 }
1550 } else if (map[i].not_with != 0) {
1551 if ((map[i].not_with & user_account_control) != 0) {
1552 ret = LDB_ERR_OTHER;
1553 break;
1554 }
1555 }
1556 }
1557 }
1558 if (ret != LDB_SUCCESS) {
1559 switch (ac->req->operation) {
1560 case LDB_ADD:
1561 ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
1562 "Failed to add %s: %s",
1563 ldb_dn_get_linearized(ac->msg->dn),
1564 map[i].error_string);
1565 break;
1566 case LDB_MODIFY:
1567 ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
1568 "Failed to modify %s: %s",
1569 ldb_dn_get_linearized(ac->msg->dn),
1570 map[i].error_string);
1571 break;
1572 default:
1573 return ldb_module_operr(ac->module);
1574 }
1575 }
1576 return ret;
1577 }
1578
1579 /**
1580 * Validate that the restriction in point 5 of MS-SAMR 3.1.1.8.10 userAccountControl is honoured
1581 *
1582 */
1583 static int samldb_check_user_account_control_acl(struct samldb_ctx *ac,
1584 struct dom_sid *sid,
1585 uint32_t user_account_control,
1586 uint32_t user_account_control_old)
1587 {
1588 int i, ret = 0;
1589 bool need_acl_check = false;
1590 struct ldb_result *res;
1591 const char * const sd_attrs[] = {"ntSecurityDescriptor", NULL};
1592 struct security_token *user_token;
1593 struct security_descriptor *domain_sd;
1594 struct ldb_dn *domain_dn = ldb_get_default_basedn(ldb_module_get_ctx(ac->module));
1595 const struct uac_to_guid {
1596 uint32_t uac;
1597 const char *oid;
1598 const char *guid;
1599 enum sec_privilege privilege;
1600 bool delete_is_privileged;
1601 const char *error_string;
1602 } map[] = {
1603 {
1604 .uac = UF_PASSWD_NOTREQD,
1605 .guid = GUID_DRS_UPDATE_PASSWORD_NOT_REQUIRED_BIT,
1606 .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"
1607 },
1608 {
1609 .uac = UF_DONT_EXPIRE_PASSWD,
1610 .guid = GUID_DRS_UNEXPIRE_PASSWORD,
1611 .error_string = "Adding the UF_DONT_EXPIRE_PASSWD bit in userAccountControl requires the Unexpire-Password right that was not given on the Domain object"
1612 },
1613 {
1614 .uac = UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED,
1615 .guid = GUID_DRS_ENABLE_PER_USER_REVERSIBLY_ENCRYPTED_PASSWORD,
1616 .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"
1617 },
1618 {
1619 .uac = UF_SERVER_TRUST_ACCOUNT,
1620 .guid = GUID_DRS_DS_INSTALL_REPLICA,
1621 .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"
1622 },
1623 {
1624 .uac = UF_PARTIAL_SECRETS_ACCOUNT,
1625 .guid = GUID_DRS_DS_INSTALL_REPLICA,
1626 .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"
1627 },
1628 {
1629 .uac = UF_INTERDOMAIN_TRUST_ACCOUNT,
1630 .oid = DSDB_CONTROL_PERMIT_INTERDOMAIN_TRUST_UAC_OID,
1631 .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",
1632 .delete_is_privileged = true
1633 },
1634 {
1635 .uac = UF_TRUSTED_FOR_DELEGATION,
1636 .privilege = SEC_PRIV_ENABLE_DELEGATION,
1637 .delete_is_privileged = true,
1638 .error_string = "Updating the UF_TRUSTED_FOR_DELEGATION bit in userAccountControl is not permitted without the SeEnableDelegationPrivilege"
1639 },
1640 {
1641 .uac = UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION,
1642 .privilege = SEC_PRIV_ENABLE_DELEGATION,
1643 .delete_is_privileged = true,
1644 .error_string = "Updating the UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION bit in userAccountControl is not permitted without the SeEnableDelegationPrivilege"
1645 }
1646
1647 };
1648
1649 if (dsdb_module_am_system(ac->module)) {
1650 return LDB_SUCCESS;
1651 }
1652
1653 for (i = 0; i < ARRAY_SIZE(map); i++) {
1654 if (user_account_control & map[i].uac) {
1655 need_acl_check = true;
1656 break;
1657 }
1658 }
1659 if (need_acl_check == false) {
1660 return LDB_SUCCESS;
1661 }
1662
1663 user_token = acl_user_token(ac->module);
1664 if (user_token == NULL) {
1665 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1666 }
1667
1668 ret = dsdb_module_search_dn(ac->module, ac, &res,
1669 domain_dn,
1670 sd_attrs,
1671 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
1672 ac->req);
1673 if (ret != LDB_SUCCESS) {
1674 return ret;
1675 }
1676 if (res->count != 1) {
1677 return ldb_module_operr(ac->module);
1678 }
1679
1680 ret = dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(ac->module),
1681 ac, res->msgs[0], &domain_sd);
1682
1683 if (ret != LDB_SUCCESS) {
1684 return ret;
1685 }
1686
1687 for (i = 0; i < ARRAY_SIZE(map); i++) {
1688 uint32_t this_uac_new = user_account_control & map[i].uac;
1689 uint32_t this_uac_old = user_account_control_old & map[i].uac;
1690 if (this_uac_new != this_uac_old) {
1691 if (this_uac_old != 0) {
1692 if (map[i].delete_is_privileged == false) {
1693 continue;
1694 }
1695 }
1696 if (map[i].oid) {
1697 struct ldb_control *control = ldb_request_get_control(ac->req, map[i].oid);
1698 if (control == NULL) {
1699 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1700 }
1701 } else if (map[i].privilege != SEC_PRIV_INVALID) {
1702 bool have_priv = security_token_has_privilege(user_token,
1703 map[i].privilege);
1704 if (have_priv == false) {
1705 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1706 }
1707 } else {
1708 ret = acl_check_extended_right(ac, domain_sd,
1709 user_token,
1710 map[i].guid,
1711 SEC_ADS_CONTROL_ACCESS,
1712 sid);
1713 }
1714 if (ret != LDB_SUCCESS) {
1715 break;
1716 }
1717 }
1718 }
1719 if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
1720 switch (ac->req->operation) {
1721 case LDB_ADD:
1722 ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
1723 "Failed to add %s: %s",
1724 ldb_dn_get_linearized(ac->msg->dn),
1725 map[i].error_string);
1726 break;
1727 case LDB_MODIFY:
1728 ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
1729 "Failed to modify %s: %s",
1730 ldb_dn_get_linearized(ac->msg->dn),
1731 map[i].error_string);
1732 break;
1733 default:
1734 return ldb_module_operr(ac->module);
1735 }
1736 if (map[i].guid) {
1737 dsdb_acl_debug(domain_sd, acl_user_token(ac->module),
1738 domain_dn,
1739 true,
1740 10);
1741 }
1742 }
1743 return ret;
1744 }
1745
1746 static int samldb_check_user_account_control_rules(struct samldb_ctx *ac,
1747 struct dom_sid *sid,
1748 uint32_t user_account_control,
1749 uint32_t user_account_control_old)
1750 {
1751 int ret;
1752 ret = samldb_check_user_account_control_invariants(ac, user_account_control);
1753 if (ret != LDB_SUCCESS) {
1754 return ret;
1755 }
1756 ret = samldb_check_user_account_control_acl(ac, sid, user_account_control, user_account_control_old);
1757 if (ret != LDB_SUCCESS) {
1758 return ret;
1759 }
1760 return ret;
1761 }
1762
1763
1764 /**
1765 * This function is called on LDB modify operations. It performs some additions/
1766 * replaces on the current LDB message when "userAccountControl" changes.
1767 */
1768 static int samldb_user_account_control_change(struct samldb_ctx *ac)
1769 {
1770 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1771 uint32_t old_uac;
1772 uint32_t new_uac;
1773 uint32_t raw_uac;
1774 uint32_t old_ufa;
1775 uint32_t new_ufa;
1776 uint32_t old_acb;
1777 uint32_t new_acb;
1778 uint32_t clear_acb;
1779 uint32_t old_atype;
1780 uint32_t new_atype;
1781 uint32_t old_pgrid;
1782 uint32_t new_pgrid;
1783 NTTIME old_lockoutTime;
1784 struct ldb_message_element *el;
1785 struct ldb_val *val;
1786 struct ldb_val computer_val;
1787 struct ldb_message *tmp_msg;
1788 struct dom_sid *sid;
1789 int ret;
1790 struct ldb_result *res;
1791 const char * const attrs[] = {
1792 "objectClass",
1793 "isCriticalSystemObject",
1794 "userAccountControl",
1795 "msDS-User-Account-Control-Computed",
1796 "lockoutTime",
1797 "objectSid",
1798 NULL
1799 };
1800 bool is_computer = false;
1801 bool old_is_critical = false;
1802 bool new_is_critical = false;
1803
1804 el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl",
1805 ac->req->operation);
1806 if (el == NULL || el->num_values == 0) {
1807 ldb_asprintf_errstring(ldb,
1808 "%08X: samldb: 'userAccountControl' can't be deleted!",
1809 W_ERROR_V(WERR_DS_ILLEGAL_MOD_OPERATION));
1810 return LDB_ERR_UNWILLING_TO_PERFORM;
1811 }
1812
1813 /* Create a temporary message for fetching the "userAccountControl" */
1814 tmp_msg = ldb_msg_new(ac->msg);
1815 if (tmp_msg == NULL) {
1816 return ldb_module_oom(ac->module);
1817 }
1818 ret = ldb_msg_add(tmp_msg, el, 0);
1819 if (ret != LDB_SUCCESS) {
1820 return ret;
1821 }
1822 raw_uac = ldb_msg_find_attr_as_uint(tmp_msg,
1823 "userAccountControl",
1824 0);
1825 new_acb = samdb_result_acct_flags(tmp_msg, NULL);
1826 talloc_free(tmp_msg);
1827 /*
1828 * UF_LOCKOUT, UF_PASSWD_CANT_CHANGE and UF_PASSWORD_EXPIRED
1829 * are only generated and not stored. We ignore them almost
1830 * completely, along with unknown bits and UF_SCRIPT.
1831 *
1832 * The only exception is ACB_AUTOLOCK, which features in
1833 * clear_acb when the bit is cleared in this modify operation.
1834 *
1835 * MS-SAMR 2.2.1.13 UF_FLAG Codes states that some bits are
1836 * ignored by clients and servers
1837 */
1838 new_uac = raw_uac & UF_SETTABLE_BITS;
1839
1840 /* Fetch the old "userAccountControl" and "objectClass" */
1841 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
1842 DSDB_FLAG_NEXT_MODULE, ac->req);
1843 if (ret != LDB_SUCCESS) {
1844 return ret;
1845 }
1846 old_uac = ldb_msg_find_attr_as_uint(res->msgs[0], "userAccountControl", 0);
1847 if (old_uac == 0) {
1848 return ldb_operr(ldb);
1849 }
1850 old_acb = samdb_result_acct_flags(res->msgs[0],
1851 "msDS-User-Account-Control-Computed");
1852 old_lockoutTime = ldb_msg_find_attr_as_int64(res->msgs[0],
1853 "lockoutTime", 0);
1854 old_is_critical = ldb_msg_find_attr_as_bool(res->msgs[0],
1855 "isCriticalSystemObject", 0);
1856 /* When we do not have objectclass "omputer" we cannot switch to a (read-only) DC */
1857 el = ldb_msg_find_element(res->msgs[0], "objectClass");
1858 if (el == NULL) {
1859 return ldb_operr(ldb);
1860 }
1861 computer_val = data_blob_string_const("computer");
1862 val = ldb_msg_find_val(el, &computer_val);
1863 if (val != NULL) {
1864 is_computer = true;
1865 }
1866
1867 old_ufa = old_uac & UF_ACCOUNT_TYPE_MASK;
1868 old_atype = ds_uf2atype(old_ufa);
1869 old_pgrid = ds_uf2prim_group_rid(old_uac);
1870
1871 new_ufa = new_uac & UF_ACCOUNT_TYPE_MASK;
1872 if (new_ufa == 0) {
1873 /*
1874 * When there is no account type embedded in "userAccountControl"
1875 * fall back to UF_NORMAL_ACCOUNT.
1876 */
1877 new_ufa = UF_NORMAL_ACCOUNT;
1878 new_uac |= new_ufa;
1879 }
1880 sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
1881 if (sid == NULL) {
1882 return ldb_module_operr(ac->module);
1883 }
1884
1885 ret = samldb_check_user_account_control_rules(ac, sid, new_uac, old_uac);
1886 if (ret != LDB_SUCCESS) {
1887 return ret;
1888 }
1889
1890 new_atype = ds_uf2atype(new_ufa);
1891 new_pgrid = ds_uf2prim_group_rid(new_uac);
1892
1893 clear_acb = old_acb & ~new_acb;
1894
1895 switch (new_ufa) {
1896 case UF_NORMAL_ACCOUNT:
1897 new_is_critical = old_is_critical;
1898 break;
1899
1900 case UF_INTERDOMAIN_TRUST_ACCOUNT:
1901 new_is_critical = true;
1902 break;
1903
1904 case UF_WORKSTATION_TRUST_ACCOUNT:
1905 new_is_critical = false;
1906 if (new_uac & UF_PARTIAL_SECRETS_ACCOUNT) {
1907 if (!is_computer) {
1908 ldb_asprintf_errstring(ldb,
1909 "%08X: samldb: UF_PARTIAL_SECRETS_ACCOUNT "
1910 "requires objectclass 'computer'!",
1911 W_ERROR_V(WERR_DS_MACHINE_ACCOUNT_CREATED_PRENT4));
1912 return LDB_ERR_UNWILLING_TO_PERFORM;
1913 }
1914 new_is_critical = true;
1915 }
1916 break;
1917
1918 case UF_SERVER_TRUST_ACCOUNT:
1919 if (!is_computer) {
1920 ldb_asprintf_errstring(ldb,
1921 "%08X: samldb: UF_SERVER_TRUST_ACCOUNT "
1922 "requires objectclass 'computer'!",
1923 W_ERROR_V(WERR_DS_MACHINE_ACCOUNT_CREATED_PRENT4));
1924 return LDB_ERR_UNWILLING_TO_PERFORM;
1925 }
1926 new_is_critical = true;
1927 break;
1928
1929 default:
1930 ldb_asprintf_errstring(ldb,
1931 "%08X: samldb: invalid userAccountControl[0x%08X]",
1932 W_ERROR_V(WERR_INVALID_PARAMETER), raw_uac);
1933 return LDB_ERR_OTHER;
1934 }
1935
1936 if (old_atype != new_atype) {
1937 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1938 "sAMAccountType", new_atype);
1939 if (ret != LDB_SUCCESS) {
1940 return ret;
1941 }
1942 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
1943 el->flags = LDB_FLAG_MOD_REPLACE;
1944 }
1945
1946 /* As per MS-SAMR 3.1.1.8.10 these flags have not to be set */
1947 if ((clear_acb & ACB_AUTOLOCK) && (old_lockoutTime != 0)) {
1948 /* "pwdLastSet" reset as password expiration has been forced */
1949 ldb_msg_remove_attr(ac->msg, "lockoutTime");
1950 ret = samdb_msg_add_uint64(ldb, ac->msg, ac->msg, "lockoutTime",
1951 (NTTIME)0);
1952 if (ret != LDB_SUCCESS) {
1953 return ret;
1954 }
1955 el = ldb_msg_find_element(ac->msg, "lockoutTime");
1956 el->flags = LDB_FLAG_MOD_REPLACE;
1957 }
1958
1959 /* "isCriticalSystemObject" might be set/changed */
1960 if (old_is_critical != new_is_critical) {
1961 ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
1962 new_is_critical ? "TRUE": "FALSE");
1963 if (ret != LDB_SUCCESS) {
1964 return ret;
1965 }
1966 el = ldb_msg_find_element(ac->msg,
1967 "isCriticalSystemObject");
1968 el->flags = LDB_FLAG_MOD_REPLACE;
1969 }
1970
1971 if (!ldb_msg_find_element(ac->msg, "primaryGroupID") &&
1972 (old_pgrid != new_pgrid)) {
1973 /* Older AD deployments don't know about the RODC group */
1974 if (new_pgrid == DOMAIN_RID_READONLY_DCS) {
1975 ret = samldb_prim_group_tester(ac, new_pgrid);
1976 if (ret != LDB_SUCCESS) {
1977 return ret;
1978 }
1979 }
1980
1981 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1982 "primaryGroupID", new_pgrid);
1983 if (ret != LDB_SUCCESS) {
1984 return ret;
1985 }
1986 el = ldb_msg_find_element(ac->msg,
1987 "primaryGroupID");
1988 el->flags = LDB_FLAG_MOD_REPLACE;
1989 }
1990
1991 /* Propagate eventual "userAccountControl" attribute changes */
1992 if (old_uac != new_uac) {
1993 char *tempstr = talloc_asprintf(ac->msg, "%d",
1994 new_uac);
1995 if (tempstr == NULL) {
1996 return ldb_module_oom(ac->module);
1997 }
1998
1999 /* Overwrite "userAccountControl" correctly */
2000 el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl",
2001 ac->req->operation);
2002 el->values[0].data = (uint8_t *) tempstr;
2003 el->values[0].length = strlen(tempstr);
2004 } else {
2005 ldb_msg_remove_attr(ac->msg, "userAccountControl");
2006 }
2007
2008 return LDB_SUCCESS;
2009 }
2010
2011 static int samldb_lockout_time(struct samldb_ctx *ac)
2012 {
2013 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2014 NTTIME lockoutTime;
2015 struct ldb_message_element *el;
2016 struct ldb_message *tmp_msg;
2017 int ret;
2018
2019 el = dsdb_get_single_valued_attr(ac->msg, "lockoutTime",
2020 ac->req->operation);
2021 if (el == NULL || el->num_values == 0) {
2022 ldb_asprintf_errstring(ldb,
2023 "%08X: samldb: 'lockoutTime' can't be deleted!",
2024 W_ERROR_V(WERR_DS_ILLEGAL_MOD_OPERATION));
2025 return LDB_ERR_UNWILLING_TO_PERFORM;
2026 }
2027
2028 /* Create a temporary message for fetching the "lockoutTime" */
2029 tmp_msg = ldb_msg_new(ac->msg);
2030 if (tmp_msg == NULL) {
2031 return ldb_module_oom(ac->module);
2032 }
2033 ret = ldb_msg_add(tmp_msg, el, 0);
2034 if (ret != LDB_SUCCESS) {
2035 return ret;
2036 }
2037 lockoutTime = ldb_msg_find_attr_as_int64(tmp_msg,
2038 "lockoutTime",
2039 0);
2040 talloc_free(tmp_msg);
2041
2042 if (lockoutTime != 0) {
2043 return LDB_SUCCESS;
2044 }
2045
2046 /* lockoutTime == 0 resets badPwdCount */
2047 ldb_msg_remove_attr(ac->msg, "badPwdCount");
2048 ret = samdb_msg_add_int(ldb, ac->msg, ac->msg,
2049 "badPwdCount", 0);
2050 if (ret != LDB_SUCCESS) {
2051 return ret;
2052 }
2053 el = ldb_msg_find_element(ac->msg, "badPwdCount");
2054 el->flags = LDB_FLAG_MOD_REPLACE;
2055
2056 return LDB_SUCCESS;
2057 }
2058
2059 static int samldb_group_type_change(struct samldb_ctx *ac)
2060 {
2061 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2062 uint32_t group_type, old_group_type, account_type;
2063 struct ldb_message_element *el;
2064 struct ldb_message *tmp_msg;
2065 int ret;
2066 struct ldb_result *res;
2067 const char * const attrs[] = { "groupType", NULL };
2068
2069 el = dsdb_get_single_valued_attr(ac->msg, "groupType",
2070 ac->req->operation);
2071 if (el == NULL) {
2072 /* we are not affected */
2073 return LDB_SUCCESS;
2074 }
2075
2076 /* Create a temporary message for fetching the "groupType" */
2077 tmp_msg = ldb_msg_new(ac->msg);
2078 if (tmp_msg == NULL) {
2079 return ldb_module_oom(ac->module);
2080 }
2081 ret = ldb_msg_add(tmp_msg, el, 0);
2082 if (ret != LDB_SUCCESS) {
2083 return ret;
2084 }
2085 group_type = ldb_msg_find_attr_as_uint(tmp_msg, "groupType", 0);
2086 talloc_free(tmp_msg);
2087
2088 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
2089 DSDB_FLAG_NEXT_MODULE |
2090 DSDB_SEARCH_SHOW_DELETED, ac->req);
2091 if (ret != LDB_SUCCESS) {
2092 return ret;
2093 }
2094 old_group_type = ldb_msg_find_attr_as_uint(res->msgs[0], "groupType", 0);
2095 if (old_group_type == 0) {
2096 return ldb_operr(ldb);
2097 }
2098
2099 /* Group type switching isn't so easy as it seems: We can only
2100 * change in this directions: global <-> universal <-> local
2101 * On each step also the group type itself
2102 * (security/distribution) is variable. */
2103
2104 if (ldb_request_get_control(ac->req, LDB_CONTROL_PROVISION_OID) == NULL) {
2105 switch (group_type) {
2106 case GTYPE_SECURITY_GLOBAL_GROUP:
2107 case GTYPE_DISTRIBUTION_GLOBAL_GROUP:
2108 /* change to "universal" allowed */
2109 if ((old_group_type == GTYPE_SECURITY_DOMAIN_LOCAL_GROUP) ||
2110 (old_group_type == GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP)) {
2111 ldb_set_errstring(ldb,
2112 "samldb: Change from security/distribution local group forbidden!");
2113 return LDB_ERR_UNWILLING_TO_PERFORM;
2114 }
2115 break;
2116
2117 case GTYPE_SECURITY_UNIVERSAL_GROUP:
2118 case GTYPE_DISTRIBUTION_UNIVERSAL_GROUP:
2119 /* each change allowed */
2120 break;
2121 case GTYPE_SECURITY_DOMAIN_LOCAL_GROUP:
2122 case GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP:
2123 /* change to "universal" allowed */
2124 if ((old_group_type == GTYPE_SECURITY_GLOBAL_GROUP) ||
2125 (old_group_type == GTYPE_DISTRIBUTION_GLOBAL_GROUP)) {
2126 ldb_set_errstring(ldb,
2127 "samldb: Change from security/distribution global group forbidden!");
2128 return LDB_ERR_UNWILLING_TO_PERFORM;
2129 }
2130 break;
2131
2132 case GTYPE_SECURITY_BUILTIN_LOCAL_GROUP:
2133 default:
2134 /* we don't allow this "groupType" values */
2135 return LDB_ERR_UNWILLING_TO_PERFORM;
2136 break;
2137 }
2138 }
2139
2140 account_type = ds_gtype2atype(group_type);
2141 if (account_type == 0) {
2142 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
2143 return LDB_ERR_UNWILLING_TO_PERFORM;
2144 }
2145 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType",
2146 account_type);
2147 if (ret != LDB_SUCCESS) {
2148 return ret;
2149 }
2150 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
2151 el->flags = LDB_FLAG_MOD_REPLACE;
2152
2153 return LDB_SUCCESS;
2154 }
2155
2156 static int samldb_sam_accountname_check(struct samldb_ctx *ac)
2157 {
2158 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2159 const char * const no_attrs[] = { NULL };
2160 struct ldb_result *res;
2161 const char *sam_accountname, *enc_str;
2162 struct ldb_message_element *el;
2163 struct ldb_message *tmp_msg;
2164 int ret;
2165
2166 el = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
2167 ac->req->operation);
2168 if (el == NULL) {
2169 /* we are not affected */
2170 return LDB_SUCCESS;
2171 }
2172
2173 /* Create a temporary message for fetching the "sAMAccountName" */
2174 tmp_msg = ldb_msg_new(ac->msg);
2175 if (tmp_msg == NULL) {
2176 return ldb_module_oom(ac->module);
2177 }
2178 ret = ldb_msg_add(tmp_msg, el, 0);
2179 if (ret != LDB_SUCCESS) {
2180 return ret;
2181 }
2182
2183 /* We must not steal the original string, it belongs to the caller! */
2184 sam_accountname = talloc_strdup(ac,
2185 ldb_msg_find_attr_as_string(tmp_msg, "sAMAccountName", NULL));
2186 talloc_free(tmp_msg);
2187
2188 if (sam_accountname == NULL) {
2189 /* The "sAMAccountName" cannot be nothing */
2190 ldb_set_errstring(ldb,
2191 "samldb: Empty account names aren't allowed!");
2192 return LDB_ERR_UNWILLING_TO_PERFORM;
2193 }
2194
2195 enc_str = ldb_binary_encode_string(ac, sam_accountname);
2196 if (enc_str == NULL) {
2197 return ldb_module_oom(ac->module);
2198 }
2199
2200 /* Make sure that a "sAMAccountName" is only used once */
2201
2202 ret = dsdb_module_search(ac->module, ac, &res,
2203 ldb_get_default_basedn(ldb),
2204 LDB_SCOPE_SUBTREE, no_attrs,
2205 DSDB_FLAG_NEXT_MODULE, ac->req,
2206 "(sAMAccountName=%s)", enc_str);
2207 if (ret != LDB_SUCCESS) {
2208 return ret;
2209 }
2210 if (res->count > 1) {
2211 return ldb_operr(ldb);
2212 } else if (res->count == 1) {
2213 if (ldb_dn_compare(res->msgs[0]->dn, ac->msg->dn) != 0) {
2214 ldb_asprintf_errstring(ldb,
2215 "samldb: Account name (sAMAccountName) '%s' already in use!",
2216 sam_accountname);
2217 return LDB_ERR_ENTRY_ALREADY_EXISTS;
2218 }
2219 }
2220 talloc_free(res);
2221
2222 return LDB_SUCCESS;
2223 }
2224
2225 static int samldb_member_check(struct samldb_ctx *ac)
2226 {
2227 const char * const attrs[] = { "objectSid", NULL };
2228 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2229 struct ldb_message_element *el;
2230 struct ldb_dn *member_dn;
2231 struct dom_sid *sid;
2232 struct ldb_result *res;
2233 struct dom_sid *group_sid;
2234 unsigned int i, j;
2235 int ret;
2236
2237 /* Fetch information from the existing object */
2238
2239 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
2240 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED, ac->req, NULL);
2241 if (ret != LDB_SUCCESS) {
2242 return ret;
2243 }
2244 if (res->count != 1) {
2245 return ldb_operr(ldb);
2246 }
2247
2248 group_sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
2249 if (group_sid == NULL) {
2250 return ldb_operr(ldb);
2251 }
2252
2253 /* We've to walk over all modification entries and consider the "member"
2254 * ones. */
2255 for (i = 0; i < ac->msg->num_elements; i++) {
2256 if (ldb_attr_cmp(ac->msg->elements[i].name, "member") != 0) {
2257 continue;
2258 }
2259
2260 el = &ac->msg->elements[i];
2261 for (j = 0; j < el->num_values; j++) {
2262 struct ldb_result *group_res;
2263 const char *group_attrs[] = { "primaryGroupID" , NULL };
2264 uint32_t prim_group_rid;
2265
2266 if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE) {
2267 /* Deletes will be handled in
2268 * repl_meta_data, and deletes not
2269 * matching a member will return
2270 * LDB_ERR_UNWILLING_TO_PERFORM
2271 * there */
2272 continue;
2273 }
2274
2275 member_dn = ldb_dn_from_ldb_val(ac, ldb,
2276 &el->values[j]);
2277 if (!ldb_dn_validate(member_dn)) {
2278 return ldb_operr(ldb);
2279 }
2280
2281 /* Denies to add "member"s to groups which are primary
2282 * ones for them - in this case return
2283 * ERR_ENTRY_ALREADY_EXISTS. */
2284
2285 ret = dsdb_module_search_dn(ac->module, ac, &group_res,
2286 member_dn, group_attrs,
2287 DSDB_FLAG_NEXT_MODULE, ac->req);
2288 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
2289 /* member DN doesn't exist yet */
2290 continue;
2291 }
2292 if (ret != LDB_SUCCESS) {
2293 return ret;
2294 }
2295 prim_group_rid = ldb_msg_find_attr_as_uint(group_res->msgs[0], "primaryGroupID", (uint32_t)-1);
2296 if (prim_group_rid == (uint32_t) -1) {
2297 /* the member hasn't to be a user account ->
2298 * therefore no check needed in this case. */
2299 continue;
2300 }
2301
2302 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb),
2303 prim_group_rid);
2304 if (sid == NULL) {
2305 return ldb_operr(ldb);
2306 }
2307
2308 if (dom_sid_equal(group_sid, sid)) {
2309 ldb_asprintf_errstring(ldb,
2310 "samldb: member %s already set via primaryGroupID %u",
2311 ldb_dn_get_linearized(member_dn), prim_group_rid);
2312 return LDB_ERR_ENTRY_ALREADY_EXISTS;
2313 }
2314 }
2315 }
2316
2317 talloc_free(res);
2318
2319 return LDB_SUCCESS;
2320 }
2321
2322 /* SAM objects have special rules regarding the "description" attribute on
2323 * modify operations. */
2324 static int samldb_description_check(struct samldb_ctx *ac, bool *modified)
2325 {
2326 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2327 const char * const attrs[] = { "objectClass", "description", NULL };
2328 struct ldb_result *res;
2329 unsigned int i;
2330 int ret;
2331
2332 /* Fetch information from the existing object */
2333 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
2334 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED, ac->req,
2335 "(|(objectclass=user)(objectclass=group)(objectclass=samDomain)(objectclass=samServer))");
2336 if (ret != LDB_SUCCESS) {
2337 /* don't treat it specially ... let normal error codes
2338 happen from other places */
2339 ldb_reset_err_string(ldb);
2340 return LDB_SUCCESS;
2341 }
2342 if (res->count == 0) {
2343 /* we didn't match the filter */
2344 talloc_free(res);
2345 return LDB_SUCCESS;
2346 }
2347
2348 /* We've to walk over all modification entries and consider the
2349 * "description" ones. */
2350 for (i = 0; i < ac->msg->num_elements; i++) {
2351 if (ldb_attr_cmp(ac->msg->elements[i].name, "description") == 0) {
2352 ac->msg->elements[i].flags |= LDB_FLAG_INTERNAL_FORCE_SINGLE_VALUE_CHECK;
2353 *modified = true;
2354 }
2355 }
2356
2357 talloc_free(res);
2358
2359 return LDB_SUCCESS;
2360 }
2361
2362 /* This trigger adapts the "servicePrincipalName" attributes if the
2363 * "dNSHostName" and/or "sAMAccountName" attribute change(s) */
2364 static int samldb_service_principal_names_change(struct samldb_ctx *ac)
2365 {
2366 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2367 struct ldb_message_element *el = NULL, *el2 = NULL;
2368 struct ldb_message *msg;
2369 const char * const attrs[] = { "servicePrincipalName", NULL };
2370 struct ldb_result *res;
2371 const char *dns_hostname = NULL, *old_dns_hostname = NULL,
2372 *sam_accountname = NULL, *old_sam_accountname = NULL;
2373 unsigned int i, j;
2374 int ret;
2375
2376 el = dsdb_get_single_valued_attr(ac->msg, "dNSHostName",
2377 ac->req->operation);
2378 el2 = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
2379 ac->req->operation);
2380 if ((el == NULL) && (el2 == NULL)) {
2381 /* we are not affected */
2382 return LDB_SUCCESS;
2383 }
2384
2385 /* Create a temporary message for fetching the "dNSHostName" */
2386 if (el != NULL) {
2387 const char *dns_attrs[] = { "dNSHostName", NULL };
2388 msg = ldb_msg_new(ac->msg);
2389 if (msg == NULL) {
2390 return ldb_module_oom(ac->module);
2391 }
2392 ret = ldb_msg_add(msg, el, 0);
2393 if (ret != LDB_SUCCESS) {
2394 return ret;
2395 }
2396 dns_hostname = talloc_strdup(ac,
2397 ldb_msg_find_attr_as_string(msg, "dNSHostName", NULL));
2398 if (dns_hostname == NULL) {
2399 return ldb_module_oom(ac->module);
2400 }
2401
2402 talloc_free(msg);
2403
2404 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn,
2405 dns_attrs, DSDB_FLAG_NEXT_MODULE, ac->req);
2406 if (ret == LDB_SUCCESS) {
2407 old_dns_hostname = ldb_msg_find_attr_as_string(res->msgs[0], "dNSHostName", NULL);
2408 }
2409 }
2410
2411 /* Create a temporary message for fetching the "sAMAccountName" */
2412 if (el2 != NULL) {
2413 char *tempstr, *tempstr2 = NULL;
2414 const char *acct_attrs[] = { "sAMAccountName", NULL };
2415
2416 msg = ldb_msg_new(ac->msg);
2417 if (msg == NULL) {
2418 return ldb_module_oom(ac->module);
2419 }
2420 ret = ldb_msg_add(msg, el2, 0);
2421 if (ret != LDB_SUCCESS) {
2422 return ret;
2423 }
2424 tempstr = talloc_strdup(ac,
2425 ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL));
2426 talloc_free(msg);
2427
2428 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, acct_attrs,
2429 DSDB_FLAG_NEXT_MODULE, ac->req);
2430 if (ret == LDB_SUCCESS) {
2431 tempstr2 = talloc_strdup(ac,
2432 ldb_msg_find_attr_as_string(res->msgs[0],
2433 "sAMAccountName", NULL));
2434 }
2435
2436
2437 /* The "sAMAccountName" needs some additional trimming: we need
2438 * to remove the trailing "$"s if they exist. */
2439 if ((tempstr != NULL) && (tempstr[0] != '\0') &&
2440 (tempstr[strlen(tempstr) - 1] == '$')) {
2441 tempstr[strlen(tempstr) - 1] = '\0';
2442 }
2443 if ((tempstr2 != NULL) && (tempstr2[0] != '\0') &&
2444 (tempstr2[strlen(tempstr2) - 1] == '$')) {
2445 tempstr2[strlen(tempstr2) - 1] = '\0';
2446 }
2447 sam_accountname = tempstr;
2448 old_sam_accountname = tempstr2;
2449 }
2450
2451 if (old_dns_hostname == NULL) {
2452 /* we cannot change when the old name is unknown */
2453 dns_hostname = NULL;
2454 }
2455 if ((old_dns_hostname != NULL) && (dns_hostname != NULL) &&
2456 (strcasecmp_m(old_dns_hostname, dns_hostname) == 0)) {
2457 /* The "dNSHostName" didn't change */
2458 dns_hostname = NULL;
2459 }
2460
2461 if (old_sam_accountname == NULL) {
2462 /* we cannot change when the old name is unknown */
2463 sam_accountname = NULL;
2464 }
2465 if ((old_sam_accountname != NULL) && (sam_accountname != NULL) &&
2466 (strcasecmp_m(old_sam_accountname, sam_accountname) == 0)) {
2467 /* The "sAMAccountName" didn't change */
2468 sam_accountname = NULL;
2469 }
2470
2471 if ((dns_hostname == NULL) && (sam_accountname == NULL)) {
2472 /* Well, there are information missing (old name(s)) or the
2473 * names didn't change. We've nothing to do and can exit here */
2474 return LDB_SUCCESS;
2475 }
2476
2477 /* Potential "servicePrincipalName" changes in the same request have to
2478 * be handled before the update (Windows behaviour). */
2479 el = ldb_msg_find_element(ac->msg, "servicePrincipalName");
2480 if (el != NULL) {
2481 msg = ldb_msg_new(ac->msg);
2482 if (msg == NULL) {
2483 return ldb_module_oom(ac->module);
2484 }
2485 msg->dn = ac->msg->dn;
2486
2487 do {
2488 ret = ldb_msg_add(msg, el, el->flags);
2489 if (ret != LDB_SUCCESS) {
2490 return ret;
2491 }
2492
2493 ldb_msg_remove_element(ac->msg, el);
2494
2495 el = ldb_msg_find_element(ac->msg,
2496 "servicePrincipalName");
2497 } while (el != NULL);
2498
2499 ret = dsdb_module_modify(ac->module, msg,
2500 DSDB_FLAG_NEXT_MODULE, ac->req);
2501 if (ret != LDB_SUCCESS) {
2502 return ret;
2503 }
2504 talloc_free(msg);
2505 }
2506
2507 /* Fetch the "servicePrincipalName"s if any */
2508 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
2509 DSDB_FLAG_NEXT_MODULE, ac->req, NULL);
2510 if (ret != LDB_SUCCESS) {
2511 return ret;
2512 }
2513 if ((res->count != 1) || (res->msgs[0]->num_elements > 1)) {
2514 return ldb_operr(ldb);
2515 }
2516
2517 if (res->msgs[0]->num_elements == 1) {
2518 /*
2519 * Yes, we do have "servicePrincipalName"s. First we update them
2520 * locally, that means we do always substitute the current
2521 * "dNSHostName" with the new one and/or "sAMAccountName"
2522 * without "$" with the new one and then we append the
2523 * modified "servicePrincipalName"s as a message element
2524 * replace to the modification request (Windows behaviour). We
2525 * need also to make sure that the values remain case-
2526 * insensitively unique.
2527 */
2528
2529 ret = ldb_msg_add_empty(ac->msg, "servicePrincipalName",
2530 LDB_FLAG_MOD_REPLACE, &el);
2531 if (ret != LDB_SUCCESS) {
2532 return ret;
2533 }
2534
2535 for (i = 0; i < res->msgs[0]->elements[0].num_values; i++) {
2536 char *old_str, *new_str, *pos;
2537 const char *tok;
2538 struct ldb_val *vals;
2539 bool found = false;
2540
2541 old_str = (char *)
2542 res->msgs[0]->elements[0].values[i].data;
2543
2544 new_str = talloc_strdup(ac->msg,
2545 strtok_r(old_str, "/", &pos));
2546 if (new_str == NULL) {
2547 return ldb_module_oom(ac->module);
2548 }
2549
2550 while ((tok = strtok_r(NULL, "/", &pos)) != NULL) {
2551 if ((dns_hostname != NULL) &&
2552 (strcasecmp_m(tok, old_dns_hostname) == 0)) {
2553 tok = dns_hostname;
2554 }
2555 if ((sam_accountname != NULL) &&
2556 (strcasecmp_m(tok, old_sam_accountname) == 0)) {
2557 tok = sam_accountname;
2558 }
2559
2560 new_str = talloc_asprintf(ac->msg, "%s/%s",
2561 new_str, tok);
2562 if (new_str == NULL) {
2563 return ldb_module_oom(ac->module);
2564 }
2565 }
2566
2567 /* Uniqueness check */
2568 for (j = 0; (!found) && (j < el->num_values); j++) {
2569 if (strcasecmp_m((char *)el->values[j].data,
2570 new_str) == 0) {
2571 found = true;
2572 }
2573 }
2574 if (found) {
2575 continue;
2576 }
2577
2578 /*
2579 * append the new "servicePrincipalName" -
2580 * code derived from ldb_msg_add_value().
2581 *
2582 * Open coded to make it clear that we must
2583 * append to the MOD_REPLACE el created above.
2584 */
2585 vals = talloc_realloc(ac->msg, el->values,
2586 struct ldb_val,
2587 el->num_values + 1);
2588 if (vals == NULL) {
2589 return ldb_module_oom(ac->module);
2590 }
2591 el->values = vals;
2592 el->values[el->num_values] = data_blob_string_const(new_str);
2593 ++(el->num_values);
2594 }
2595 }
2596
2597 talloc_free(res);
2598
2599 return LDB_SUCCESS;
2600 }
2601
2602 /* This checks the "fSMORoleOwner" attributes */
2603 static int samldb_fsmo_role_owner_check(struct samldb_ctx *ac)
2604 {
2605 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2606 const char * const no_attrs[] = { NULL };
2607 struct ldb_message_element *el;
2608 struct ldb_message *tmp_msg;
2609 struct ldb_dn *res_dn;
2610 struct ldb_result *res;
2611 int ret;
2612
2613 el = dsdb_get_single_valued_attr(ac->msg, "fSMORoleOwner",
2614 ac->req->operation);
2615 if (el == NULL) {
2616 /* we are not affected */
2617 return LDB_SUCCESS;
2618 }
2619
2620 /* Create a temporary message for fetching the "fSMORoleOwner" */
2621 tmp_msg = ldb_msg_new(ac->msg);
2622 if (tmp_msg == NULL) {
2623 return ldb_module_oom(ac->module);
2624 }
2625 ret = ldb_msg_add(tmp_msg, el, 0);
2626 if (ret != LDB_SUCCESS) {
2627 return ret;
2628 }
2629 res_dn = ldb_msg_find_attr_as_dn(ldb, ac, tmp_msg, "fSMORoleOwner");
2630 talloc_free(tmp_msg);
2631
2632 if (res_dn == NULL) {
2633 ldb_set_errstring(ldb,
2634 "samldb: 'fSMORoleOwner' attributes have to reference 'nTDSDSA' entries!");
2635 if (ac->req->operation == LDB_ADD) {
2636 return LDB_ERR_CONSTRAINT_VIOLATION;
2637 } else {
2638 return LDB_ERR_UNWILLING_TO_PERFORM;
2639 }
2640 }
2641
2642 /* Fetched DN has to reference a "nTDSDSA" entry */
2643 ret = dsdb_module_search(ac->module, ac, &res, res_dn, LDB_SCOPE_BASE,
2644 no_attrs,
2645 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
2646 ac->req, "(objectClass=nTDSDSA)");
2647 if (ret != LDB_SUCCESS) {
2648 return ret;
2649 }
2650 if (res->count != 1) {
2651 ldb_set_errstring(ldb,
2652 "samldb: 'fSMORoleOwner' attributes have to reference 'nTDSDSA' entries!");
2653 return LDB_ERR_UNWILLING_TO_PERFORM;
2654 }
2655
2656 talloc_free(res);
2657
2658 return LDB_SUCCESS;
2659 }
2660
2661
2662 /* add */
2663 static int samldb_add(struct ldb_module *module, struct ldb_request *req)
2664 {
2665 struct ldb_context *ldb;
2666 struct samldb_ctx *ac;
2667 struct ldb_message_element *el;
2668 int ret;
2669
2670 ldb = ldb_module_get_ctx(module);
2671 ldb_debug(ldb, LDB_DEBUG_TRACE, "samldb_add\n");
2672
2673 /* do not manipulate our control entries */
2674 if (ldb_dn_is_special(req->op.add.message->dn)) {
2675 return ldb_next_request(module, req);
2676 }
2677
2678 el = ldb_msg_find_element(req->op.add.message, "userParameters");
2679 if (el != NULL && ldb_req_is_untrusted(req)) {
2680 const char *reason = "samldb_add: "
2681 "setting userParameters is not supported over LDAP, "
2682 "see https://bugzilla.samba.org/show_bug.cgi?id=8077";
2683 ldb_debug(ldb, LDB_DEBUG_WARNING, "%s", reason);
2684 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, reason);
2685 }
2686
2687 ac = samldb_ctx_init(module, req);
2688 if (ac == NULL) {
2689 return ldb_operr(ldb);
2690 }
2691
2692 /* build the new msg */
2693 ac->msg = ldb_msg_copy_shallow(ac, req->op.add.message);
2694 if (ac->msg == NULL) {
2695 talloc_free(ac);
2696 ldb_debug(ldb, LDB_DEBUG_FATAL,
2697 "samldb_add: ldb_msg_copy_shallow failed!\n");
2698 return ldb_operr(ldb);
2699 }
2700
2701 el = ldb_msg_find_element(ac->msg, "fSMORoleOwner");
2702 if (el != NULL) {
2703 ret = samldb_fsmo_role_owner_check(ac);
2704 if (ret != LDB_SUCCESS) {
2705 return ret;
2706 }
2707 }
2708
2709 if (samdb_find_attribute(ldb, ac->msg,
2710 "objectclass", "user") != NULL) {
2711 ac->type = SAMLDB_TYPE_USER;
2712
2713 ret = samldb_prim_group_trigger(ac);
2714 if (ret != LDB_SUCCESS) {
2715 return ret;
2716 }
2717
2718 ret = samldb_objectclass_trigger(ac);
2719 if (ret != LDB_SUCCESS) {
2720 return ret;
2721 }
2722
2723 return samldb_fill_object(ac);
2724 }
2725
2726 if (samdb_find_attribute(ldb, ac->msg,
2727 "objectclass", "group") != NULL) {
2728 ac->type = SAMLDB_TYPE_GROUP;
2729
2730 ret = samldb_objectclass_trigger(ac);
2731 if (ret != LDB_SUCCESS) {
2732 return ret;
2733 }
2734
2735 return samldb_fill_object(ac);
2736 }
2737
2738 /* perhaps a foreignSecurityPrincipal? */
2739 if (samdb_find_attribute(ldb, ac->msg,
2740 "objectclass",
2741 "foreignSecurityPrincipal") != NULL) {
2742 return samldb_fill_foreignSecurityPrincipal_object(ac);
2743 }
2744
2745 if (samdb_find_attribute(ldb, ac->msg,
2746 "objectclass", "classSchema") != NULL) {
2747 ret = samldb_schema_info_update(ac);
2748 if (ret != LDB_SUCCESS) {
2749 talloc_free(ac);
2750 return ret;
2751 }
2752
2753 ac->type = SAMLDB_TYPE_CLASS;
2754 return samldb_fill_object(ac);
2755 }
2756
2757 if (samdb_find_attribute(ldb, ac->msg,
2758 "objectclass", "attributeSchema") != NULL) {
2759 ret = samldb_schema_info_update(ac);
2760 if (ret != LDB_SUCCESS) {
2761 talloc_free(ac);
2762 return ret;
2763 }
2764
2765 ac->type = SAMLDB_TYPE_ATTRIBUTE;
2766 return samldb_fill_object(ac);
2767 }
2768
2769 talloc_free(ac);
2770
2771 /* nothing matched, go on */
2772 return ldb_next_request(module, req);
2773 }
2774
2775 /* modify */
2776 static int samldb_modify(struct ldb_module *module, struct ldb_request *req)
2777 {
2778 struct ldb_context *ldb;
2779 struct samldb_ctx *ac;
2780 struct ldb_message_element *el, *el2;
2781 bool modified = false;
2782 int ret;
2783
2784 if (ldb_dn_is_special(req->op.mod.message->dn)) {
2785 /* do not manipulate our control entries */
2786 return ldb_next_request(module, req);
2787 }
2788
2789 ldb = ldb_module_get_ctx(module);
2790
2791 /* make sure that "objectSid" is not specified */
2792 el = ldb_msg_find_element(req->op.mod.message, "objectSid");
2793 if (el != NULL) {
2794 if (ldb_request_get_control(req, LDB_CONTROL_PROVISION_OID) == NULL) {
2795 ldb_set_errstring(ldb,
2796 "samldb: objectSid must not be specified!");
2797 return LDB_ERR_UNWILLING_TO_PERFORM;
2798 }
2799 }
2800 /* make sure that "sAMAccountType" is not specified */
2801 el = ldb_msg_find_element(req->op.mod.message, "sAMAccountType");
2802 if (el != NULL) {
2803 ldb_set_errstring(ldb,
2804 "samldb: sAMAccountType must not be specified!");
2805 return LDB_ERR_UNWILLING_TO_PERFORM;
2806 }
2807 /* make sure that "isCriticalSystemObject" is not specified */
2808 el = ldb_msg_find_element(req->op.mod.message, "isCriticalSystemObject");
2809 if (el != NULL) {
2810 if (ldb_request_get_control(req, LDB_CONTROL_RELAX_OID) == NULL) {
2811 ldb_set_errstring(ldb,
2812 "samldb: isCriticalSystemObject must not be specified!");
2813 return LDB_ERR_UNWILLING_TO_PERFORM;
2814 }
2815 }
2816
2817 /* msDS-IntId is not allowed to be modified
2818 * except when modification comes from replication */
2819 if (ldb_msg_find_element(req->op.mod.message, "msDS-IntId")) {
2820 if (!ldb_request_get_control(req,
2821 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
2822 return LDB_ERR_CONSTRAINT_VIOLATION;
2823 }
2824 }
2825
2826 el = ldb_msg_find_element(req->op.mod.message, "userParameters");
2827 if (el != NULL && ldb_req_is_untrusted(req)) {
2828 const char *reason = "samldb: "
2829 "setting userParameters is not supported over LDAP, "
2830 "see https://bugzilla.samba.org/show_bug.cgi?id=8077";
2831 ldb_debug(ldb, LDB_DEBUG_WARNING, "%s", reason);
2832 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, reason);
2833 }
2834
2835 ac = samldb_ctx_init(module, req);
2836 if (ac == NULL) {
2837 return ldb_operr(ldb);
2838 }
2839
2840 /* build the new msg */
2841 ac->msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
2842 if (ac->msg == NULL) {
2843 talloc_free(ac);
2844 ldb_debug(ldb, LDB_DEBUG_FATAL,
2845 "samldb_modify: ldb_msg_copy_shallow failed!\n");
2846 return ldb_operr(ldb);
2847 }
2848
2849 el = ldb_msg_find_element(ac->msg, "primaryGroupID");
2850 if (el != NULL) {
2851 ret = samldb_prim_group_trigger(ac);
2852 if (ret != LDB_SUCCESS) {
2853 return ret;
2854 }
2855 }
2856
2857 el = ldb_msg_find_element(ac->msg, "userAccountControl");
2858 if (el != NULL) {
2859 modified = true;
2860 ret = samldb_user_account_control_change(ac);
2861 if (ret != LDB_SUCCESS) {
2862 return ret;
2863 }
2864 }
2865
2866 el = ldb_msg_find_element(ac->msg, "lockoutTime");
2867 if (el != NULL) {
2868 modified = true;
2869 ret = samldb_lockout_time(ac);
2870 if (ret != LDB_SUCCESS) {
2871 return ret;
2872 }
2873 }
2874
2875 el = ldb_msg_find_element(ac->msg, "groupType");
2876 if (el != NULL) {
2877 modified = true;
2878 ret = samldb_group_type_change(ac);
2879 if (ret != LDB_SUCCESS) {
2880 return ret;
2881 }
2882 }
2883
2884 el = ldb_msg_find_element(ac->msg, "sAMAccountName");
2885 if (el != NULL) {
2886 ret = samldb_sam_accountname_check(ac);
2887 if (ret != LDB_SUCCESS) {
2888 return ret;
2889 }
2890 }
2891
2892 el = ldb_msg_find_element(ac->msg, "member");
2893 if (el != NULL) {
2894 ret = samldb_member_check(ac);
2895 if (ret != LDB_SUCCESS) {
2896 return ret;
2897 }
2898 }
2899
2900 el = ldb_msg_find_element(ac->msg, "description");
2901 if (el != NULL) {
2902 ret = samldb_description_check(ac, &modified);
2903 if (ret != LDB_SUCCESS) {
2904 return ret;
2905 }
2906 }
2907
2908 el = ldb_msg_find_element(ac->msg, "dNSHostName");
2909 el2 = ldb_msg_find_element(ac->msg, "sAMAccountName");
2910 if ((el != NULL) || (el2 != NULL)) {
2911 modified = true;
2912 ret = samldb_service_principal_names_change(ac);
2913 if (ret != LDB_SUCCESS) {
2914 return ret;
2915 }
2916 }
2917
2918 el = ldb_msg_find_element(ac->msg, "fSMORoleOwner");
2919 if (el != NULL) {
2920 ret = samldb_fsmo_role_owner_check(ac);
2921 if (ret != LDB_SUCCESS) {
2922 return ret;
2923 }
2924 }
2925
2926 if (modified) {
2927 struct ldb_request *child_req;
2928
2929 /* Now perform the real modifications as a child request */
2930 ret = ldb_build_mod_req(&child_req, ldb, ac,
2931 ac->msg,
2932 req->controls,
2933 req, dsdb_next_callback,
2934 req);
2935 LDB_REQ_SET_LOCATION(child_req);
2936 if (ret != LDB_SUCCESS) {
2937 return ret;
2938 }
2939
2940 return ldb_next_request(module, child_req);
2941 }
2942
2943 talloc_free(ac);
2944
2945 /* no change which interests us, go on */
2946 return ldb_next_request(module, req);
2947 }
2948
2949 /* delete */
2950
2951 static int samldb_prim_group_users_check(struct samldb_ctx *ac)
2952 {
2953 struct ldb_context *ldb;
2954 struct dom_sid *sid;
2955 uint32_t rid;
2956 NTSTATUS status;
2957 int ret;
2958 struct ldb_result *res;
2959 const char * const attrs[] = { "objectSid", "isDeleted", NULL };
2960 const char * const noattrs[] = { NULL };
2961
2962 ldb = ldb_module_get_ctx(ac->module);
2963
2964 /* Finds out the SID/RID of the SAM object */
2965 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->req->op.del.dn,
2966 attrs,
2967 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
2968 ac->req);
2969 if (ret != LDB_SUCCESS) {
2970 return ret;
2971 }
2972
2973 if (ldb_msg_check_string_attribute(res->msgs[0], "isDeleted", "TRUE")) {
2974 return LDB_SUCCESS;
2975 }
2976
2977 sid = samdb_result_dom_sid(ac, res->msgs[0], "objectSid");
2978 if (sid == NULL) {
2979 /* No SID - it might not be a SAM object - therefore ok */
2980 return LDB_SUCCESS;
2981 }
2982 status = dom_sid_split_rid(ac, sid, NULL, &rid);
2983 if (!NT_STATUS_IS_OK(status)) {
2984 return ldb_operr(ldb);
2985 }
2986 if (rid == 0) {
2987 /* Special object (security principal?) */
2988 return LDB_SUCCESS;
2989 }
2990 /* do not allow deletion of well-known sids */
2991 if (rid < DSDB_SAMDB_MINIMUM_ALLOWED_RID &&
2992 (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) == NULL)) {
2993 return LDB_ERR_OTHER;
2994 }
2995
2996 /* Deny delete requests from groups which are primary ones */
2997 ret = dsdb_module_search(ac->module, ac, &res,
2998 ldb_get_default_basedn(ldb),
2999 LDB_SCOPE_SUBTREE, noattrs,
3000 DSDB_FLAG_NEXT_MODULE,
3001 ac->req,
3002 "(&(primaryGroupID=%u)(objectClass=user))", rid);
3003 if (ret != LDB_SUCCESS) {
3004 return ret;
3005 }
3006 if (res->count > 0) {
3007 return LDB_ERR_ENTRY_ALREADY_EXISTS;
3008 }
3009
3010 return LDB_SUCCESS;
3011 }
3012
3013 static int samldb_delete(struct ldb_module *module, struct ldb_request *req)
3014 {
3015 struct samldb_ctx *ac;
3016 int ret;
3017
3018 if (ldb_dn_is_special(req->op.del.dn)) {
3019 /* do not manipulate our control entries */
3020 return ldb_next_request(module, req);
3021 }
3022
3023 ac = samldb_ctx_init(module, req);
3024 if (ac == NULL) {
3025 return ldb_operr(ldb_module_get_ctx(module));
3026 }
3027
3028 ret = samldb_prim_group_users_check(ac);
3029 if (ret != LDB_SUCCESS) {
3030 return ret;
3031 }
3032
3033 talloc_free(ac);
3034
3035 return ldb_next_request(module, req);
3036 }
3037
3038 /* rename */
3039
3040 static int check_rename_constraints(struct ldb_message *msg,
3041 struct samldb_ctx *ac,
3042 struct ldb_dn *olddn, struct ldb_dn *newdn)
3043 {
3044 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
3045 struct ldb_dn *dn1, *dn2, *nc_root;
3046 int32_t systemFlags;
3047 bool move_op = false;
3048 bool rename_op = false;
3049 int ret;
3050
3051 /* Skip the checks if old and new DN are the same, or if we have the
3052 * relax control specified or if the returned objects is already
3053 * deleted and needs only to be moved for consistency. */
3054
3055 if (ldb_dn_compare(olddn, newdn) == 0) {
3056 return LDB_SUCCESS;
3057 }
3058 if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) != NULL) {
3059 return LDB_SUCCESS;
3060 }
3061 if (ldb_msg_find_attr_as_bool(msg, "isDeleted", false)) {
3062 return LDB_SUCCESS;
3063 }
3064
3065 /* Objects under CN=System */
3066
3067 dn1 = ldb_dn_copy(ac, ldb_get_default_basedn(ldb));
3068 if (dn1 == NULL) return ldb_oom(ldb);
3069
3070 if ( ! ldb_dn_add_child_fmt(dn1, "CN=System")) {
3071 talloc_free(dn1);
3072 return LDB_ERR_OPERATIONS_ERROR;
3073 }
3074
3075 if ((ldb_dn_compare_base(dn1, olddn) == 0) &&
3076 (ldb_dn_compare_base(dn1, newdn) != 0)) {
3077 talloc_free(dn1);
3078 ldb_asprintf_errstring(ldb,
3079 "subtree_rename: Cannot move/rename %s. Objects under CN=System have to stay under it!",
3080 ldb_dn_get_linearized(olddn));
3081 return LDB_ERR_OTHER;
3082 }
3083
3084 talloc_free(dn1);
3085
3086 /* LSA objects */
3087
3088 if ((samdb_find_attribute(ldb, msg, "objectClass", "secret") != NULL) ||
3089 (samdb_find_attribute(ldb, msg, "objectClass", "trustedDomain") != NULL)) {
3090 ldb_asprintf_errstring(ldb,
3091 "subtree_rename: Cannot move/rename %s. It's an LSA-specific object!",
3092 ldb_dn_get_linearized(olddn));
3093 return LDB_ERR_UNWILLING_TO_PERFORM;
3094 }
3095
3096 /* systemFlags */
3097
3098 dn1 = ldb_dn_get_parent(ac, olddn);
3099 if (dn1 == NULL) return ldb_oom(ldb);
3100 dn2 = ldb_dn_get_parent(ac, newdn);
3101 if (dn2 == NULL) return ldb_oom(ldb);
3102
3103 if (ldb_dn_compare(dn1, dn2) == 0) {
3104 rename_op = true;
3105 } else {
3106 move_op = true;
3107 }
3108
3109 talloc_free(dn1);
3110 talloc_free(dn2);
3111
3112 systemFlags = ldb_msg_find_attr_as_int(msg, "systemFlags", 0);
3113
3114 /* Fetch name context */
3115
3116 ret = dsdb_find_nc_root(ldb, ac, olddn, &nc_root);
3117 if (ret != LDB_SUCCESS) {
3118 return ret;
3119 }
3120
3121 if (ldb_dn_compare(nc_root, ldb_get_schema_basedn(ldb)) == 0) {
3122 if (move_op) {
3123 ldb_asprintf_errstring(ldb,
3124 "subtree_rename: Cannot move %s within schema partition",
3125 ldb_dn_get_linearized(olddn));
3126 return LDB_ERR_UNWILLING_TO_PERFORM;
3127 }
3128 if (rename_op &&
3129 (systemFlags & SYSTEM_FLAG_SCHEMA_BASE_OBJECT) != 0) {
3130 ldb_asprintf_errstring(ldb,
3131 "subtree_rename: Cannot rename %s within schema partition",
3132 ldb_dn_get_linearized(olddn));
3133 return LDB_ERR_UNWILLING_TO_PERFORM;
3134 }
3135 } else if (ldb_dn_compare(nc_root, ldb_get_config_basedn(ldb)) == 0) {
3136 if (move_op &&
3137 (systemFlags & SYSTEM_FLAG_CONFIG_ALLOW_MOVE) == 0) {
3138 /* Here we have to do more: control the
3139 * "ALLOW_LIMITED_MOVE" flag. This means that the
3140 * grand-grand-parents of two objects have to be equal
3141 * in order to perform the move (this is used for
3142 * moving "server" objects in the "sites" container). */
3143 bool limited_move =
3144 systemFlags & SYSTEM_FLAG_CONFIG_ALLOW_LIMITED_MOVE;
3145
3146 if (limited_move) {
3147 dn1 = ldb_dn_copy(ac, olddn);
3148 if (dn1 == NULL) return ldb_oom(ldb);
3149 dn2 = ldb_dn_copy(ac, newdn);
3150 if (dn2 == NULL) return ldb_oom(ldb);
3151
3152 limited_move &= ldb_dn_remove_child_components(dn1, 3);
3153 limited_move &= ldb_dn_remove_child_components(dn2, 3);
3154 limited_move &= ldb_dn_compare(dn1, dn2) == 0;
3155
3156 talloc_free(dn1);
3157 talloc_free(dn2);
3158 }
3159
3160 if (!limited_move) {
3161 ldb_asprintf_errstring(ldb,
3162 "subtree_rename: Cannot move %s to %s in config partition",
3163 ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
3164 return LDB_ERR_UNWILLING_TO_PERFORM;
3165 }
3166 }
3167 if (rename_op &&
3168 (systemFlags & SYSTEM_FLAG_CONFIG_ALLOW_RENAME) == 0) {
3169 ldb_asprintf_errstring(ldb,
3170 "subtree_rename: Cannot rename %s to %s within config partition",
3171 ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
3172 return LDB_ERR_UNWILLING_TO_PERFORM;
3173 }
3174 } else if (ldb_dn_compare(nc_root, ldb_get_default_basedn(ldb)) == 0) {
3175 if (move_op &&
3176 (systemFlags & SYSTEM_FLAG_DOMAIN_DISALLOW_MOVE) != 0) {
3177 ldb_asprintf_errstring(ldb,
3178 "subtree_rename: Cannot move %s to %s - DISALLOW_MOVE set",
3179 ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
3180 return LDB_ERR_UNWILLING_TO_PERFORM;
3181 }
3182 if (rename_op &&
3183 (systemFlags & SYSTEM_FLAG_DOMAIN_DISALLOW_RENAME) != 0) {
3184 ldb_asprintf_errstring(ldb,
3185 "subtree_rename: Cannot rename %s to %s - DISALLOW_RENAME set",
3186 ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
3187 return LDB_ERR_UNWILLING_TO_PERFORM;
3188 }
3189 }
3190
3191 talloc_free(nc_root);
3192
3193 return LDB_SUCCESS;
3194 }
3195
3196
3197 static int samldb_rename_search_base_callback(struct ldb_request *req,
3198 struct ldb_reply *ares)
3199 {
3200 struct samldb_ctx *ac;
3201 int ret;
3202
3203 ac = talloc_get_type(req->context, struct samldb_ctx);
3204
3205 if (!ares) {
3206 return ldb_module_done(ac->req, NULL, NULL,
3207 LDB_ERR_OPERATIONS_ERROR);
3208 }
3209 if (ares->error != LDB_SUCCESS) {
3210 return ldb_module_done(ac->req, ares->controls,
3211 ares->response, ares->error);
3212 }
3213
3214 switch (ares->type) {
3215 case LDB_REPLY_ENTRY:
3216 /*
3217 * This is the root entry of the originating move
3218 * respectively rename request. It has been already
3219 * stored in the list using "subtree_rename_search()".
3220 * Only this one is subject to constraint checking.
3221 */
3222 ret = check_rename_constraints(ares->message, ac,
3223 ac->req->op.rename.olddn,
3224 ac->req->op.rename.newdn);
3225 if (ret != LDB_SUCCESS) {
3226 return ldb_module_done(ac->req, NULL, NULL,
3227 ret);
3228 }
3229 break;
3230
3231 case LDB_REPLY_REFERRAL:
3232 /* ignore */
3233 break;
3234
3235 case LDB_REPLY_DONE:
3236
3237 /*
3238 * Great, no problem with the rename, so go ahead as
3239 * if we never were here
3240 */
3241 ret = ldb_next_request(ac->module, ac->req);
3242 talloc_free(ares);
3243 return ret;
3244 }
3245
3246 talloc_free(ares);
3247 return LDB_SUCCESS;
3248 }
3249
3250
3251 /* rename */
3252 static int samldb_rename(struct ldb_module *module, struct ldb_request *req)
3253 {
3254 struct ldb_context *ldb;
3255 static const char * const attrs[] = { "objectClass", "systemFlags",
3256 "isDeleted", NULL };
3257 struct ldb_request *search_req;
3258 struct samldb_ctx *ac;
3259 int ret;
3260
3261 if (ldb_dn_is_special(req->op.rename.olddn)) { /* do not manipulate our control entries */
3262 return ldb_next_request(module, req);
3263 }
3264
3265 ldb = ldb_module_get_ctx(module);
3266
3267 ac = samldb_ctx_init(module, req);
3268 if (!ac) {
3269 return ldb_oom(ldb);
3270 }
3271
3272 ret = ldb_build_search_req(&search_req, ldb, ac,
3273 req->op.rename.olddn,
3274 LDB_SCOPE_BASE,
3275 "(objectClass=*)",
3276 attrs,
3277 NULL,
3278 ac,
3279 samldb_rename_search_base_callback,
3280 req);
3281 LDB_REQ_SET_LOCATION(search_req);
3282 if (ret != LDB_SUCCESS) {
3283 return ret;
3284 }
3285
3286 ret = ldb_request_add_control(search_req, LDB_CONTROL_SHOW_RECYCLED_OID,
3287 true, NULL);
3288 if (ret != LDB_SUCCESS) {
3289 return ret;
3290 }
3291
3292 return ldb_next_request(ac->module, search_req);
3293 }
3294
3295 /* extended */
3296
3297 static int samldb_extended_allocate_rid_pool(struct ldb_module *module, struct ldb_request *req)
3298 {
3299 struct ldb_context *ldb = ldb_module_get_ctx(module);
3300 struct dsdb_fsmo_extended_op *exop;
3301 int ret;
3302
3303 exop = talloc_get_type(req->op.extended.data,
3304 struct dsdb_fsmo_extended_op);
3305 if (!exop) {
3306 ldb_set_errstring(ldb,
3307 "samldb_extended_allocate_rid_pool: invalid extended data");
3308 return LDB_ERR_PROTOCOL_ERROR;
3309 }
3310
3311 ret = ridalloc_allocate_rid_pool_fsmo(module, exop, req);
3312 if (ret != LDB_SUCCESS) {
3313 return ret;
3314 }
3315
3316 return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
3317 }
3318
3319 static int samldb_extended(struct ldb_module *module, struct ldb_request *req)
3320 {
3321 if (strcmp(req->op.extended.oid, DSDB_EXTENDED_ALLOCATE_RID_POOL) == 0) {
3322 return samldb_extended_allocate_rid_pool(module, req);
3323 }
3324
3325 return ldb_next_request(module, req);
3326 }
3327
3328
3329 static const struct ldb_module_ops ldb_samldb_module_ops = {
3330 .name = "samldb",
3331 .add = samldb_add,
3332 .modify = samldb_modify,
3333 .del = samldb_delete,
3334 .rename = samldb_rename,
3335 .extended = samldb_extended
3336 };
3337
3338
3339 int ldb_samldb_module_init(const char *version)
3340 {
3341 LDB_MODULE_CHECK_VERSION(version);
3342 return ldb_register_module(&ldb_samldb_module_ops);
3343 }
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