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dsdb-samldb: Clarify that accounts really do fall back to UF_NORMAL_ACCOUNT if no...
[Samba.git] / source4 / dsdb / samdb / ldb_modules / samldb.c
blobc80d5595005c023b742ed4f5831f8a857d1b7741
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 /*
1052 * "userAccountControl" = 0 or missing one of
1053 * the types means "UF_NORMAL_ACCOUNT". See
1054 * MS-SAMR 3.1.1.8.10 point 8
1055 */
1056 if ((user_account_control & UF_ACCOUNT_TYPE_MASK) == 0) {
1057 user_account_control = UF_NORMAL_ACCOUNT | user_account_control;
1058 uac_generated = true;
1059 }
1060
1061 /*
1062 * As per MS-SAMR 3.1.1.8.10 these flags have not to be set
1063 */
1064 if ((user_account_control & UF_LOCKOUT) != 0) {
1065 user_account_control &= ~UF_LOCKOUT;
1066 uac_generated = true;
1067 }
1068 if ((user_account_control & UF_PASSWORD_EXPIRED) != 0) {
1069 user_account_control &= ~UF_PASSWORD_EXPIRED;
1070 uac_generated = true;
1071 }
1072
1073 ret = samldb_check_user_account_control_rules(ac, NULL,
1074 user_account_control, 0);
1075 if (ret != LDB_SUCCESS) {
1076 return ret;
1077 }
1078
1079 /* Workstation and (read-only) DC objects do need objectclass "computer" */
1080 if ((samdb_find_attribute(ldb, ac->msg,
1081 "objectclass", "computer") == NULL) &&
1082 (user_account_control &
1083 (UF_SERVER_TRUST_ACCOUNT | UF_WORKSTATION_TRUST_ACCOUNT))) {
1084 ldb_set_errstring(ldb,
1085 "samldb: Requested account type does need objectclass 'computer'!");
1086 return LDB_ERR_OBJECT_CLASS_VIOLATION;
1087 }
1088
1089 account_type = ds_uf2atype(user_account_control);
1090 if (account_type == 0) {
1091 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
1092 return LDB_ERR_UNWILLING_TO_PERFORM;
1093 }
1094 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1095 "sAMAccountType",
1096 account_type);
1097 if (ret != LDB_SUCCESS) {
1098 return ret;
1099 }
1100 el2 = ldb_msg_find_element(ac->msg, "sAMAccountType");
1101 el2->flags = LDB_FLAG_MOD_REPLACE;
1102
1103 /* "isCriticalSystemObject" might be set */
1104 if (user_account_control &
1105 (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
1106 ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
1107 "TRUE");
1108 if (ret != LDB_SUCCESS) {
1109 return ret;
1110 }
1111 el2 = ldb_msg_find_element(ac->msg,
1112 "isCriticalSystemObject");
1113 el2->flags = LDB_FLAG_MOD_REPLACE;
1114 } else if (user_account_control & UF_WORKSTATION_TRUST_ACCOUNT) {
1115 ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
1116 "FALSE");
1117 if (ret != LDB_SUCCESS) {
1118 return ret;
1119 }
1120 el2 = ldb_msg_find_element(ac->msg,
1121 "isCriticalSystemObject");
1122 el2->flags = LDB_FLAG_MOD_REPLACE;
1123 }
1124
1125 /* Step 1.4: "userAccountControl" -> "primaryGroupID" mapping */
1126 if (!ldb_msg_find_element(ac->msg, "primaryGroupID")) {
1127 uint32_t rid = ds_uf2prim_group_rid(user_account_control);
1128
1129 /*
1130 * Older AD deployments don't know about the
1131 * RODC group
1132 */
1133 if (rid == DOMAIN_RID_READONLY_DCS) {
1134 ret = samldb_prim_group_tester(ac, rid);
1135 if (ret != LDB_SUCCESS) {
1136 return ret;
1137 }
1138 }
1139
1140 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1141 "primaryGroupID", rid);
1142 if (ret != LDB_SUCCESS) {
1143 return ret;
1144 }
1145 el2 = ldb_msg_find_element(ac->msg,
1146 "primaryGroupID");
1147 el2->flags = LDB_FLAG_MOD_REPLACE;
1148 }
1149
1150 /* Step 1.5: Add additional flags when needed */
1151 /* Obviously this is done when the "userAccountControl"
1152 * has been generated here (tested against Windows
1153 * Server) */
1154 if (uac_generated) {
1155 if (uac_add_flags) {
1156 user_account_control |= UF_ACCOUNTDISABLE;
1157 user_account_control |= UF_PASSWD_NOTREQD;
1158 }
1159
1160 ret = samdb_msg_set_uint(ldb, ac->msg, ac->msg,
1161 "userAccountControl",
1162 user_account_control);
1163 if (ret != LDB_SUCCESS) {
1164 return ret;
1165 }
1166 }
1167
1168 }
1169 break;
1170 }
1171
1172 case SAMLDB_TYPE_GROUP: {
1173 const char *tempstr;
1174
1175 /* Step 2.2: Default values */
1176 tempstr = talloc_asprintf(ac->msg, "%d",
1177 GTYPE_SECURITY_GLOBAL_GROUP);
1178 if (tempstr == NULL) return ldb_operr(ldb);
1179 ret = samdb_find_or_add_attribute(ldb, ac->msg,
1180 "groupType", tempstr);
1181 if (ret != LDB_SUCCESS) return ret;
1182
1183 /* Step 2.3: "groupType" -> "sAMAccountType" */
1184 el = ldb_msg_find_element(ac->msg, "groupType");
1185 if (el != NULL) {
1186 uint32_t group_type, account_type;
1187
1188 group_type = ldb_msg_find_attr_as_uint(ac->msg,
1189 "groupType", 0);
1190
1191 /* The creation of builtin groups requires the
1192 * RELAX control */
1193 if (group_type == GTYPE_SECURITY_BUILTIN_LOCAL_GROUP) {
1194 if (ldb_request_get_control(ac->req,
1195 LDB_CONTROL_RELAX_OID) == NULL) {
1196 return LDB_ERR_UNWILLING_TO_PERFORM;
1197 }
1198 }
1199
1200 account_type = ds_gtype2atype(group_type);
1201 if (account_type == 0) {
1202 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
1203 return LDB_ERR_UNWILLING_TO_PERFORM;
1204 }
1205 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1206 "sAMAccountType",
1207 account_type);
1208 if (ret != LDB_SUCCESS) {
1209 return ret;
1210 }
1211 el2 = ldb_msg_find_element(ac->msg, "sAMAccountType");
1212 el2->flags = LDB_FLAG_MOD_REPLACE;
1213 }
1214 break;
1215 }
1216
1217 default:
1218 ldb_asprintf_errstring(ldb,
1219 "Invalid entry type!");
1220 return LDB_ERR_OPERATIONS_ERROR;
1221 break;
1222 }
1223
1224 return LDB_SUCCESS;
1225 }
1226
1227 /*
1228 * "Primary group ID" trigger (MS-SAMR 3.1.1.8.2)
1229 *
1230 * Has to be invoked on "add" and "modify" operations on "user" and "computer"
1231 * objects.
1232 * ac->msg contains the "add"/"modify" message
1233 */
1234
1235 static int samldb_prim_group_tester(struct samldb_ctx *ac, uint32_t rid)
1236 {
1237 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1238 struct dom_sid *sid;
1239 struct ldb_result *res;
1240 int ret;
1241 const char * const noattrs[] = { NULL };
1242
1243 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
1244 if (sid == NULL) {
1245 return ldb_operr(ldb);
1246 }
1247
1248 ret = dsdb_module_search(ac->module, ac, &res,
1249 ldb_get_default_basedn(ldb),
1250 LDB_SCOPE_SUBTREE,
1251 noattrs, DSDB_FLAG_NEXT_MODULE,
1252 ac->req,
1253 "(objectSid=%s)",
1254 ldap_encode_ndr_dom_sid(ac, sid));
1255 if (ret != LDB_SUCCESS) {
1256 return ret;
1257 }
1258 if (res->count != 1) {
1259 talloc_free(res);
1260 ldb_asprintf_errstring(ldb,
1261 "Failed to find primary group with RID %u!",
1262 rid);
1263 return LDB_ERR_UNWILLING_TO_PERFORM;
1264 }
1265 talloc_free(res);
1266
1267 return LDB_SUCCESS;
1268 }
1269
1270 static int samldb_prim_group_set(struct samldb_ctx *ac)
1271 {
1272 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1273 uint32_t rid;
1274
1275 rid = ldb_msg_find_attr_as_uint(ac->msg, "primaryGroupID", (uint32_t) -1);
1276 if (rid == (uint32_t) -1) {
1277 /* we aren't affected of any primary group set */
1278 return LDB_SUCCESS;
1279
1280 } else if (!ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
1281 ldb_set_errstring(ldb,
1282 "The primary group isn't settable on add operations!");
1283 return LDB_ERR_UNWILLING_TO_PERFORM;
1284 }
1285
1286 return samldb_prim_group_tester(ac, rid);
1287 }
1288
1289 static int samldb_prim_group_change(struct samldb_ctx *ac)
1290 {
1291 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1292 const char * const attrs[] = {
1293 "primaryGroupID",
1294 "memberOf",
1295 "userAccountControl",
1296 NULL };
1297 struct ldb_result *res, *group_res;
1298 struct ldb_message_element *el;
1299 struct ldb_message *msg;
1300 uint32_t prev_rid, new_rid, uac;
1301 struct dom_sid *prev_sid, *new_sid;
1302 struct ldb_dn *prev_prim_group_dn, *new_prim_group_dn;
1303 int ret;
1304 const char * const noattrs[] = { NULL };
1305
1306 el = dsdb_get_single_valued_attr(ac->msg, "primaryGroupID",
1307 ac->req->operation);
1308 if (el == NULL) {
1309 /* we are not affected */
1310 return LDB_SUCCESS;
1311 }
1312
1313 /* Fetch information from the existing object */
1314
1315 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
1316 DSDB_FLAG_NEXT_MODULE, ac->req);
1317 if (ret != LDB_SUCCESS) {
1318 return ret;
1319 }
1320
1321 uac = ldb_msg_find_attr_as_uint(res->msgs[0], "userAccountControl", 0);
1322
1323 /* Finds out the DN of the old primary group */
1324
1325 prev_rid = ldb_msg_find_attr_as_uint(res->msgs[0], "primaryGroupID",
1326 (uint32_t) -1);
1327 if (prev_rid == (uint32_t) -1) {
1328 /* User objects do always have a mandatory "primaryGroupID"
1329 * attribute. If this doesn't exist then the object is of the
1330 * wrong type. This is the exact Windows error code */
1331 return LDB_ERR_OBJECT_CLASS_VIOLATION;
1332 }
1333
1334 prev_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), prev_rid);
1335 if (prev_sid == NULL) {
1336 return ldb_operr(ldb);
1337 }
1338
1339 /* Finds out the DN of the new primary group
1340 * Notice: in order to parse the primary group ID correctly we create
1341 * a temporary message here. */
1342
1343 msg = ldb_msg_new(ac->msg);
1344 if (msg == NULL) {
1345 return ldb_module_oom(ac->module);
1346 }
1347 ret = ldb_msg_add(msg, el, 0);
1348 if (ret != LDB_SUCCESS) {
1349 return ret;
1350 }
1351 new_rid = ldb_msg_find_attr_as_uint(msg, "primaryGroupID", (uint32_t) -1);
1352 talloc_free(msg);
1353 if (new_rid == (uint32_t) -1) {
1354 /* we aren't affected of any primary group change */
1355 return LDB_SUCCESS;
1356 }
1357
1358 if (prev_rid == new_rid) {
1359 return LDB_SUCCESS;
1360 }
1361
1362 if ((uac & UF_SERVER_TRUST_ACCOUNT) && new_rid != DOMAIN_RID_DCS) {
1363 ldb_asprintf_errstring(ldb,
1364 "%08X: samldb: UF_SERVER_TRUST_ACCOUNT requires "
1365 "primaryGroupID=%u!",
1366 W_ERROR_V(WERR_DS_CANT_MOD_PRIMARYGROUPID),
1367 DOMAIN_RID_DCS);
1368 return LDB_ERR_UNWILLING_TO_PERFORM;
1369 }
1370
1371 if ((uac & UF_PARTIAL_SECRETS_ACCOUNT) && new_rid != DOMAIN_RID_READONLY_DCS) {
1372 ldb_asprintf_errstring(ldb,
1373 "%08X: samldb: UF_PARTIAL_SECRETS_ACCOUNT requires "
1374 "primaryGroupID=%u!",
1375 W_ERROR_V(WERR_DS_CANT_MOD_PRIMARYGROUPID),
1376 DOMAIN_RID_READONLY_DCS);
1377 return LDB_ERR_UNWILLING_TO_PERFORM;
1378 }
1379
1380 ret = dsdb_module_search(ac->module, ac, &group_res,
1381 ldb_get_default_basedn(ldb),
1382 LDB_SCOPE_SUBTREE,
1383 noattrs, DSDB_FLAG_NEXT_MODULE,
1384 ac->req,
1385 "(objectSid=%s)",
1386 ldap_encode_ndr_dom_sid(ac, prev_sid));
1387 if (ret != LDB_SUCCESS) {
1388 return ret;
1389 }
1390 if (group_res->count != 1) {
1391 return ldb_operr(ldb);
1392 }
1393 prev_prim_group_dn = group_res->msgs[0]->dn;
1394
1395 new_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), new_rid);
1396 if (new_sid == NULL) {
1397 return ldb_operr(ldb);
1398 }
1399
1400 ret = dsdb_module_search(ac->module, ac, &group_res,
1401 ldb_get_default_basedn(ldb),
1402 LDB_SCOPE_SUBTREE,
1403 noattrs, DSDB_FLAG_NEXT_MODULE,
1404 ac->req,
1405 "(objectSid=%s)",
1406 ldap_encode_ndr_dom_sid(ac, new_sid));
1407 if (ret != LDB_SUCCESS) {
1408 return ret;
1409 }
1410 if (group_res->count != 1) {
1411 /* Here we know if the specified new primary group candidate is
1412 * valid or not. */
1413 return LDB_ERR_UNWILLING_TO_PERFORM;
1414 }
1415 new_prim_group_dn = group_res->msgs[0]->dn;
1416
1417 /* We need to be already a normal member of the new primary
1418 * group in order to be successful. */
1419 el = samdb_find_attribute(ldb, res->msgs[0], "memberOf",
1420 ldb_dn_get_linearized(new_prim_group_dn));
1421 if (el == NULL) {
1422 return LDB_ERR_UNWILLING_TO_PERFORM;
1423 }
1424
1425 /* Remove the "member" attribute on the new primary group */
1426 msg = ldb_msg_new(ac->msg);
1427 if (msg == NULL) {
1428 return ldb_module_oom(ac->module);
1429 }
1430 msg->dn = new_prim_group_dn;
1431
1432 ret = samdb_msg_add_delval(ldb, msg, msg, "member",
1433 ldb_dn_get_linearized(ac->msg->dn));
1434 if (ret != LDB_SUCCESS) {
1435 return ret;
1436 }
1437
1438 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
1439 if (ret != LDB_SUCCESS) {
1440 return ret;
1441 }
1442 talloc_free(msg);
1443
1444 /* Add a "member" attribute for the previous primary group */
1445 msg = ldb_msg_new(ac->msg);
1446 if (msg == NULL) {
1447 return ldb_module_oom(ac->module);
1448 }
1449 msg->dn = prev_prim_group_dn;
1450
1451 ret = samdb_msg_add_addval(ldb, msg, msg, "member",
1452 ldb_dn_get_linearized(ac->msg->dn));
1453 if (ret != LDB_SUCCESS) {
1454 return ret;
1455 }
1456
1457 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
1458 if (ret != LDB_SUCCESS) {
1459 return ret;
1460 }
1461 talloc_free(msg);
1462
1463 return LDB_SUCCESS;
1464 }
1465
1466 static int samldb_prim_group_trigger(struct samldb_ctx *ac)
1467 {
1468 int ret;
1469
1470 if (ac->req->operation == LDB_ADD) {
1471 ret = samldb_prim_group_set(ac);
1472 } else {
1473 ret = samldb_prim_group_change(ac);
1474 }
1475
1476 return ret;
1477 }
1478
1479 static int samldb_check_user_account_control_invariants(struct samldb_ctx *ac,
1480 uint32_t user_account_control)
1481 {
1482 int i, ret = 0;
1483 bool need_check = false;
1484 const struct uac_to_guid {
1485 uint32_t uac;
1486 bool never;
1487 uint32_t needs;
1488 uint32_t not_with;
1489 const char *error_string;
1490 } map[] = {
1491 {
1492 .uac = UF_TEMP_DUPLICATE_ACCOUNT,
1493 .never = true,
1494 .error_string = "Updating the UF_TEMP_DUPLICATE_ACCOUNT flag is never allowed"
1495 },
1496 {
1497 .uac = UF_PARTIAL_SECRETS_ACCOUNT,
1498 .needs = UF_WORKSTATION_TRUST_ACCOUNT,
1499 .error_string = "Setting UF_PARTIAL_SECRETS_ACCOUNT only permitted with UF_WORKSTATION_TRUST_ACCOUNT"
1500 },
1501 {
1502 .uac = UF_TRUSTED_FOR_DELEGATION,
1503 .not_with = UF_PARTIAL_SECRETS_ACCOUNT,
1504 .error_string = "Setting UF_TRUSTED_FOR_DELEGATION not allowed with UF_PARTIAL_SECRETS_ACCOUNT"
1505 },
1506 {
1507 .uac = UF_NORMAL_ACCOUNT,
1508 .not_with = UF_ACCOUNT_TYPE_MASK & ~UF_NORMAL_ACCOUNT,
1509 .error_string = "Setting more than one account type not permitted"
1510 },
1511 {
1512 .uac = UF_WORKSTATION_TRUST_ACCOUNT,
1513 .not_with = UF_ACCOUNT_TYPE_MASK & ~UF_WORKSTATION_TRUST_ACCOUNT,
1514 .error_string = "Setting more than one account type not permitted"
1515 },
1516 {
1517 .uac = UF_INTERDOMAIN_TRUST_ACCOUNT,
1518 .not_with = UF_ACCOUNT_TYPE_MASK & ~UF_INTERDOMAIN_TRUST_ACCOUNT,
1519 .error_string = "Setting more than one account type not permitted"
1520 },
1521 {
1522 .uac = UF_SERVER_TRUST_ACCOUNT,
1523 .not_with = UF_ACCOUNT_TYPE_MASK & ~UF_SERVER_TRUST_ACCOUNT,
1524 .error_string = "Setting more than one account type not permitted"
1525 },
1526 {
1527 .uac = UF_TRUSTED_FOR_DELEGATION,
1528 .not_with = UF_PARTIAL_SECRETS_ACCOUNT,
1529 .error_string = "Setting UF_TRUSTED_FOR_DELEGATION not allowed with UF_PARTIAL_SECRETS_ACCOUNT"
1530 }
1531 };
1532
1533 for (i = 0; i < ARRAY_SIZE(map); i++) {
1534 if (user_account_control & map[i].uac) {
1535 need_check = true;
1536 break;
1537 }
1538 }
1539 if (need_check == false) {
1540 return LDB_SUCCESS;
1541 }
1542
1543 for (i = 0; i < ARRAY_SIZE(map); i++) {
1544 uint32_t this_uac = user_account_control & map[i].uac;
1545 if (this_uac != 0) {
1546 if (map[i].never) {
1547 ret = LDB_ERR_OTHER;
1548 break;
1549 } else if (map[i].needs != 0) {
1550 if ((map[i].needs & user_account_control) == 0) {
1551 ret = LDB_ERR_OTHER;
1552 break;
1553 }
1554 } else if (map[i].not_with != 0) {
1555 if ((map[i].not_with & user_account_control) != 0) {
1556 ret = LDB_ERR_OTHER;
1557 break;
1558 }
1559 }
1560 }
1561 }
1562 if (ret != LDB_SUCCESS) {
1563 switch (ac->req->operation) {
1564 case LDB_ADD:
1565 ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
1566 "Failed to add %s: %s",
1567 ldb_dn_get_linearized(ac->msg->dn),
1568 map[i].error_string);
1569 break;
1570 case LDB_MODIFY:
1571 ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
1572 "Failed to modify %s: %s",
1573 ldb_dn_get_linearized(ac->msg->dn),
1574 map[i].error_string);
1575 break;
1576 default:
1577 return ldb_module_operr(ac->module);
1578 }
1579 }
1580 return ret;
1581 }
1582
1583 /**
1584 * Validate that the restriction in point 5 of MS-SAMR 3.1.1.8.10 userAccountControl is honoured
1585 *
1586 */
1587 static int samldb_check_user_account_control_acl(struct samldb_ctx *ac,
1588 struct dom_sid *sid,
1589 uint32_t user_account_control,
1590 uint32_t user_account_control_old)
1591 {
1592 int i, ret = 0;
1593 bool need_acl_check = false;
1594 struct ldb_result *res;
1595 const char * const sd_attrs[] = {"ntSecurityDescriptor", NULL};
1596 struct security_token *user_token;
1597 struct security_descriptor *domain_sd;
1598 struct ldb_dn *domain_dn = ldb_get_default_basedn(ldb_module_get_ctx(ac->module));
1599 const struct uac_to_guid {
1600 uint32_t uac;
1601 const char *oid;
1602 const char *guid;
1603 enum sec_privilege privilege;
1604 bool delete_is_privileged;
1605 const char *error_string;
1606 } map[] = {
1607 {
1608 .uac = UF_PASSWD_NOTREQD,
1609 .guid = GUID_DRS_UPDATE_PASSWORD_NOT_REQUIRED_BIT,
1610 .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"
1611 },
1612 {
1613 .uac = UF_DONT_EXPIRE_PASSWD,
1614 .guid = GUID_DRS_UNEXPIRE_PASSWORD,
1615 .error_string = "Adding the UF_DONT_EXPIRE_PASSWD bit in userAccountControl requires the Unexpire-Password right that was not given on the Domain object"
1616 },
1617 {
1618 .uac = UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED,
1619 .guid = GUID_DRS_ENABLE_PER_USER_REVERSIBLY_ENCRYPTED_PASSWORD,
1620 .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"
1621 },
1622 {
1623 .uac = UF_SERVER_TRUST_ACCOUNT,
1624 .guid = GUID_DRS_DS_INSTALL_REPLICA,
1625 .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"
1626 },
1627 {
1628 .uac = UF_PARTIAL_SECRETS_ACCOUNT,
1629 .guid = GUID_DRS_DS_INSTALL_REPLICA,
1630 .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"
1631 },
1632 {
1633 .uac = UF_INTERDOMAIN_TRUST_ACCOUNT,
1634 .oid = DSDB_CONTROL_PERMIT_INTERDOMAIN_TRUST_UAC_OID,
1635 .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",
1636 .delete_is_privileged = true
1637 },
1638 {
1639 .uac = UF_TRUSTED_FOR_DELEGATION,
1640 .privilege = SEC_PRIV_ENABLE_DELEGATION,
1641 .delete_is_privileged = true,
1642 .error_string = "Updating the UF_TRUSTED_FOR_DELEGATION bit in userAccountControl is not permitted without the SeEnableDelegationPrivilege"
1643 },
1644 {
1645 .uac = UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION,
1646 .privilege = SEC_PRIV_ENABLE_DELEGATION,
1647 .delete_is_privileged = true,
1648 .error_string = "Updating the UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION bit in userAccountControl is not permitted without the SeEnableDelegationPrivilege"
1649 }
1650
1651 };
1652
1653 if (dsdb_module_am_system(ac->module)) {
1654 return LDB_SUCCESS;
1655 }
1656
1657 for (i = 0; i < ARRAY_SIZE(map); i++) {
1658 if (user_account_control & map[i].uac) {
1659 need_acl_check = true;
1660 break;
1661 }
1662 }
1663 if (need_acl_check == false) {
1664 return LDB_SUCCESS;
1665 }
1666
1667 user_token = acl_user_token(ac->module);
1668 if (user_token == NULL) {
1669 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1670 }
1671
1672 ret = dsdb_module_search_dn(ac->module, ac, &res,
1673 domain_dn,
1674 sd_attrs,
1675 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
1676 ac->req);
1677 if (ret != LDB_SUCCESS) {
1678 return ret;
1679 }
1680 if (res->count != 1) {
1681 return ldb_module_operr(ac->module);
1682 }
1683
1684 ret = dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(ac->module),
1685 ac, res->msgs[0], &domain_sd);
1686
1687 if (ret != LDB_SUCCESS) {
1688 return ret;
1689 }
1690
1691 for (i = 0; i < ARRAY_SIZE(map); i++) {
1692 uint32_t this_uac_new = user_account_control & map[i].uac;
1693 uint32_t this_uac_old = user_account_control_old & map[i].uac;
1694 if (this_uac_new != this_uac_old) {
1695 if (this_uac_old != 0) {
1696 if (map[i].delete_is_privileged == false) {
1697 continue;
1698 }
1699 }
1700 if (map[i].oid) {
1701 struct ldb_control *control = ldb_request_get_control(ac->req, map[i].oid);
1702 if (control == NULL) {
1703 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1704 }
1705 } else if (map[i].privilege != SEC_PRIV_INVALID) {
1706 bool have_priv = security_token_has_privilege(user_token,
1707 map[i].privilege);
1708 if (have_priv == false) {
1709 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1710 }
1711 } else {
1712 ret = acl_check_extended_right(ac, domain_sd,
1713 user_token,
1714 map[i].guid,
1715 SEC_ADS_CONTROL_ACCESS,
1716 sid);
1717 }
1718 if (ret != LDB_SUCCESS) {
1719 break;
1720 }
1721 }
1722 }
1723 if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
1724 switch (ac->req->operation) {
1725 case LDB_ADD:
1726 ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
1727 "Failed to add %s: %s",
1728 ldb_dn_get_linearized(ac->msg->dn),
1729 map[i].error_string);
1730 break;
1731 case LDB_MODIFY:
1732 ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
1733 "Failed to modify %s: %s",
1734 ldb_dn_get_linearized(ac->msg->dn),
1735 map[i].error_string);
1736 break;
1737 default:
1738 return ldb_module_operr(ac->module);
1739 }
1740 if (map[i].guid) {
1741 dsdb_acl_debug(domain_sd, acl_user_token(ac->module),
1742 domain_dn,
1743 true,
1744 10);
1745 }
1746 }
1747 return ret;
1748 }
1749
1750 static int samldb_check_user_account_control_rules(struct samldb_ctx *ac,
1751 struct dom_sid *sid,
1752 uint32_t user_account_control,
1753 uint32_t user_account_control_old)
1754 {
1755 int ret;
1756 ret = samldb_check_user_account_control_invariants(ac, user_account_control);
1757 if (ret != LDB_SUCCESS) {
1758 return ret;
1759 }
1760 ret = samldb_check_user_account_control_acl(ac, sid, user_account_control, user_account_control_old);
1761 if (ret != LDB_SUCCESS) {
1762 return ret;
1763 }
1764 return ret;
1765 }
1766
1767
1768 /**
1769 * This function is called on LDB modify operations. It performs some additions/
1770 * replaces on the current LDB message when "userAccountControl" changes.
1771 */
1772 static int samldb_user_account_control_change(struct samldb_ctx *ac)
1773 {
1774 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1775 uint32_t old_uac;
1776 uint32_t new_uac;
1777 uint32_t raw_uac;
1778 uint32_t old_ufa;
1779 uint32_t new_ufa;
1780 uint32_t old_acb;
1781 uint32_t new_acb;
1782 uint32_t clear_acb;
1783 uint32_t old_atype;
1784 uint32_t new_atype;
1785 uint32_t old_pgrid;
1786 uint32_t new_pgrid;
1787 NTTIME old_lockoutTime;
1788 struct ldb_message_element *el;
1789 struct ldb_val *val;
1790 struct ldb_val computer_val;
1791 struct ldb_message *tmp_msg;
1792 struct dom_sid *sid;
1793 int ret;
1794 struct ldb_result *res;
1795 const char * const attrs[] = {
1796 "objectClass",
1797 "isCriticalSystemObject",
1798 "userAccountControl",
1799 "msDS-User-Account-Control-Computed",
1800 "lockoutTime",
1801 "objectSid",
1802 NULL
1803 };
1804 bool is_computer = false;
1805 bool old_is_critical = false;
1806 bool new_is_critical = false;
1807
1808 el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl",
1809 ac->req->operation);
1810 if (el == NULL || el->num_values == 0) {
1811 ldb_asprintf_errstring(ldb,
1812 "%08X: samldb: 'userAccountControl' can't be deleted!",
1813 W_ERROR_V(WERR_DS_ILLEGAL_MOD_OPERATION));
1814 return LDB_ERR_UNWILLING_TO_PERFORM;
1815 }
1816
1817 /* Create a temporary message for fetching the "userAccountControl" */
1818 tmp_msg = ldb_msg_new(ac->msg);
1819 if (tmp_msg == NULL) {
1820 return ldb_module_oom(ac->module);
1821 }
1822 ret = ldb_msg_add(tmp_msg, el, 0);
1823 if (ret != LDB_SUCCESS) {
1824 return ret;
1825 }
1826 raw_uac = ldb_msg_find_attr_as_uint(tmp_msg,
1827 "userAccountControl",
1828 0);
1829 new_acb = samdb_result_acct_flags(tmp_msg, NULL);
1830 talloc_free(tmp_msg);
1831 /*
1832 * UF_LOCKOUT, UF_PASSWD_CANT_CHANGE and UF_PASSWORD_EXPIRED
1833 * are only generated and not stored. We ignore them almost
1834 * completely, along with unknown bits and UF_SCRIPT.
1835 *
1836 * The only exception is ACB_AUTOLOCK, which features in
1837 * clear_acb when the bit is cleared in this modify operation.
1838 *
1839 * MS-SAMR 2.2.1.13 UF_FLAG Codes states that some bits are
1840 * ignored by clients and servers
1841 */
1842 new_uac = raw_uac & UF_SETTABLE_BITS;
1843
1844 /* Fetch the old "userAccountControl" and "objectClass" */
1845 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
1846 DSDB_FLAG_NEXT_MODULE, ac->req);
1847 if (ret != LDB_SUCCESS) {
1848 return ret;
1849 }
1850 old_uac = ldb_msg_find_attr_as_uint(res->msgs[0], "userAccountControl", 0);
1851 if (old_uac == 0) {
1852 return ldb_operr(ldb);
1853 }
1854 old_acb = samdb_result_acct_flags(res->msgs[0],
1855 "msDS-User-Account-Control-Computed");
1856 old_lockoutTime = ldb_msg_find_attr_as_int64(res->msgs[0],
1857 "lockoutTime", 0);
1858 old_is_critical = ldb_msg_find_attr_as_bool(res->msgs[0],
1859 "isCriticalSystemObject", 0);
1860 /* When we do not have objectclass "omputer" we cannot switch to a (read-only) DC */
1861 el = ldb_msg_find_element(res->msgs[0], "objectClass");
1862 if (el == NULL) {
1863 return ldb_operr(ldb);
1864 }
1865 computer_val = data_blob_string_const("computer");
1866 val = ldb_msg_find_val(el, &computer_val);
1867 if (val != NULL) {
1868 is_computer = true;
1869 }
1870
1871 old_ufa = old_uac & UF_ACCOUNT_TYPE_MASK;
1872 old_atype = ds_uf2atype(old_ufa);
1873 old_pgrid = ds_uf2prim_group_rid(old_uac);
1874
1875 new_ufa = new_uac & UF_ACCOUNT_TYPE_MASK;
1876 if (new_ufa == 0) {
1877 /*
1878 * "userAccountControl" = 0 or missing one of the
1879 * types means "UF_NORMAL_ACCOUNT". See MS-SAMR
1880 * 3.1.1.8.10 point 8
1881 */
1882 new_ufa = UF_NORMAL_ACCOUNT;
1883 new_uac |= new_ufa;
1884 }
1885 sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
1886 if (sid == NULL) {
1887 return ldb_module_operr(ac->module);
1888 }
1889
1890 ret = samldb_check_user_account_control_rules(ac, sid, new_uac, old_uac);
1891 if (ret != LDB_SUCCESS) {
1892 return ret;
1893 }
1894
1895 new_atype = ds_uf2atype(new_ufa);
1896 new_pgrid = ds_uf2prim_group_rid(new_uac);
1897
1898 clear_acb = old_acb & ~new_acb;
1899
1900 switch (new_ufa) {
1901 case UF_NORMAL_ACCOUNT:
1902 new_is_critical = old_is_critical;
1903 break;
1904
1905 case UF_INTERDOMAIN_TRUST_ACCOUNT:
1906 new_is_critical = true;
1907 break;
1908
1909 case UF_WORKSTATION_TRUST_ACCOUNT:
1910 new_is_critical = false;
1911 if (new_uac & UF_PARTIAL_SECRETS_ACCOUNT) {
1912 if (!is_computer) {
1913 ldb_asprintf_errstring(ldb,
1914 "%08X: samldb: UF_PARTIAL_SECRETS_ACCOUNT "
1915 "requires objectclass 'computer'!",
1916 W_ERROR_V(WERR_DS_MACHINE_ACCOUNT_CREATED_PRENT4));
1917 return LDB_ERR_UNWILLING_TO_PERFORM;
1918 }
1919 new_is_critical = true;
1920 }
1921 break;
1922
1923 case UF_SERVER_TRUST_ACCOUNT:
1924 if (!is_computer) {
1925 ldb_asprintf_errstring(ldb,
1926 "%08X: samldb: UF_SERVER_TRUST_ACCOUNT "
1927 "requires objectclass 'computer'!",
1928 W_ERROR_V(WERR_DS_MACHINE_ACCOUNT_CREATED_PRENT4));
1929 return LDB_ERR_UNWILLING_TO_PERFORM;
1930 }
1931 new_is_critical = true;
1932 break;
1933
1934 default:
1935 ldb_asprintf_errstring(ldb,
1936 "%08X: samldb: invalid userAccountControl[0x%08X]",
1937 W_ERROR_V(WERR_INVALID_PARAMETER), raw_uac);
1938 return LDB_ERR_OTHER;
1939 }
1940
1941 if (old_atype != new_atype) {
1942 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1943 "sAMAccountType", new_atype);
1944 if (ret != LDB_SUCCESS) {
1945 return ret;
1946 }
1947 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
1948 el->flags = LDB_FLAG_MOD_REPLACE;
1949 }
1950
1951 /* As per MS-SAMR 3.1.1.8.10 these flags have not to be set */
1952 if ((clear_acb & ACB_AUTOLOCK) && (old_lockoutTime != 0)) {
1953 /* "pwdLastSet" reset as password expiration has been forced */
1954 ldb_msg_remove_attr(ac->msg, "lockoutTime");
1955 ret = samdb_msg_add_uint64(ldb, ac->msg, ac->msg, "lockoutTime",
1956 (NTTIME)0);
1957 if (ret != LDB_SUCCESS) {
1958 return ret;
1959 }
1960 el = ldb_msg_find_element(ac->msg, "lockoutTime");
1961 el->flags = LDB_FLAG_MOD_REPLACE;
1962 }
1963
1964 /* "isCriticalSystemObject" might be set/changed */
1965 if (old_is_critical != new_is_critical) {
1966 ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
1967 new_is_critical ? "TRUE": "FALSE");
1968 if (ret != LDB_SUCCESS) {
1969 return ret;
1970 }
1971 el = ldb_msg_find_element(ac->msg,
1972 "isCriticalSystemObject");
1973 el->flags = LDB_FLAG_MOD_REPLACE;
1974 }
1975
1976 if (!ldb_msg_find_element(ac->msg, "primaryGroupID") &&
1977 (old_pgrid != new_pgrid)) {
1978 /* Older AD deployments don't know about the RODC group */
1979 if (new_pgrid == DOMAIN_RID_READONLY_DCS) {
1980 ret = samldb_prim_group_tester(ac, new_pgrid);
1981 if (ret != LDB_SUCCESS) {
1982 return ret;
1983 }
1984 }
1985
1986 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1987 "primaryGroupID", new_pgrid);
1988 if (ret != LDB_SUCCESS) {
1989 return ret;
1990 }
1991 el = ldb_msg_find_element(ac->msg,
1992 "primaryGroupID");
1993 el->flags = LDB_FLAG_MOD_REPLACE;
1994 }
1995
1996 /* Propagate eventual "userAccountControl" attribute changes */
1997 if (old_uac != new_uac) {
1998 char *tempstr = talloc_asprintf(ac->msg, "%d",
1999 new_uac);
2000 if (tempstr == NULL) {
2001 return ldb_module_oom(ac->module);
2002 }
2003
2004 /* Overwrite "userAccountControl" correctly */
2005 el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl",
2006 ac->req->operation);
2007 el->values[0].data = (uint8_t *) tempstr;
2008 el->values[0].length = strlen(tempstr);
2009 } else {
2010 ldb_msg_remove_attr(ac->msg, "userAccountControl");
2011 }
2012
2013 return LDB_SUCCESS;
2014 }
2015
2016 static int samldb_lockout_time(struct samldb_ctx *ac)
2017 {
2018 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2019 NTTIME lockoutTime;
2020 struct ldb_message_element *el;
2021 struct ldb_message *tmp_msg;
2022 int ret;
2023
2024 el = dsdb_get_single_valued_attr(ac->msg, "lockoutTime",
2025 ac->req->operation);
2026 if (el == NULL || el->num_values == 0) {
2027 ldb_asprintf_errstring(ldb,
2028 "%08X: samldb: 'lockoutTime' can't be deleted!",
2029 W_ERROR_V(WERR_DS_ILLEGAL_MOD_OPERATION));
2030 return LDB_ERR_UNWILLING_TO_PERFORM;
2031 }
2032
2033 /* Create a temporary message for fetching the "lockoutTime" */
2034 tmp_msg = ldb_msg_new(ac->msg);
2035 if (tmp_msg == NULL) {
2036 return ldb_module_oom(ac->module);
2037 }
2038 ret = ldb_msg_add(tmp_msg, el, 0);
2039 if (ret != LDB_SUCCESS) {
2040 return ret;
2041 }
2042 lockoutTime = ldb_msg_find_attr_as_int64(tmp_msg,
2043 "lockoutTime",
2044 0);
2045 talloc_free(tmp_msg);
2046
2047 if (lockoutTime != 0) {
2048 return LDB_SUCCESS;
2049 }
2050
2051 /* lockoutTime == 0 resets badPwdCount */
2052 ldb_msg_remove_attr(ac->msg, "badPwdCount");
2053 ret = samdb_msg_add_int(ldb, ac->msg, ac->msg,
2054 "badPwdCount", 0);
2055 if (ret != LDB_SUCCESS) {
2056 return ret;
2057 }
2058 el = ldb_msg_find_element(ac->msg, "badPwdCount");
2059 el->flags = LDB_FLAG_MOD_REPLACE;
2060
2061 return LDB_SUCCESS;
2062 }
2063
2064 static int samldb_group_type_change(struct samldb_ctx *ac)
2065 {
2066 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2067 uint32_t group_type, old_group_type, account_type;
2068 struct ldb_message_element *el;
2069 struct ldb_message *tmp_msg;
2070 int ret;
2071 struct ldb_result *res;
2072 const char * const attrs[] = { "groupType", NULL };
2073
2074 el = dsdb_get_single_valued_attr(ac->msg, "groupType",
2075 ac->req->operation);
2076 if (el == NULL) {
2077 /* we are not affected */
2078 return LDB_SUCCESS;
2079 }
2080
2081 /* Create a temporary message for fetching the "groupType" */
2082 tmp_msg = ldb_msg_new(ac->msg);
2083 if (tmp_msg == NULL) {
2084 return ldb_module_oom(ac->module);
2085 }
2086 ret = ldb_msg_add(tmp_msg, el, 0);
2087 if (ret != LDB_SUCCESS) {
2088 return ret;
2089 }
2090 group_type = ldb_msg_find_attr_as_uint(tmp_msg, "groupType", 0);
2091 talloc_free(tmp_msg);
2092
2093 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
2094 DSDB_FLAG_NEXT_MODULE |
2095 DSDB_SEARCH_SHOW_DELETED, ac->req);
2096 if (ret != LDB_SUCCESS) {
2097 return ret;
2098 }
2099 old_group_type = ldb_msg_find_attr_as_uint(res->msgs[0], "groupType", 0);
2100 if (old_group_type == 0) {
2101 return ldb_operr(ldb);
2102 }
2103
2104 /* Group type switching isn't so easy as it seems: We can only
2105 * change in this directions: global <-> universal <-> local
2106 * On each step also the group type itself
2107 * (security/distribution) is variable. */
2108
2109 if (ldb_request_get_control(ac->req, LDB_CONTROL_PROVISION_OID) == NULL) {
2110 switch (group_type) {
2111 case GTYPE_SECURITY_GLOBAL_GROUP:
2112 case GTYPE_DISTRIBUTION_GLOBAL_GROUP:
2113 /* change to "universal" allowed */
2114 if ((old_group_type == GTYPE_SECURITY_DOMAIN_LOCAL_GROUP) ||
2115 (old_group_type == GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP)) {
2116 ldb_set_errstring(ldb,
2117 "samldb: Change from security/distribution local group forbidden!");
2118 return LDB_ERR_UNWILLING_TO_PERFORM;
2119 }
2120 break;
2121
2122 case GTYPE_SECURITY_UNIVERSAL_GROUP:
2123 case GTYPE_DISTRIBUTION_UNIVERSAL_GROUP:
2124 /* each change allowed */
2125 break;
2126 case GTYPE_SECURITY_DOMAIN_LOCAL_GROUP:
2127 case GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP:
2128 /* change to "universal" allowed */
2129 if ((old_group_type == GTYPE_SECURITY_GLOBAL_GROUP) ||
2130 (old_group_type == GTYPE_DISTRIBUTION_GLOBAL_GROUP)) {
2131 ldb_set_errstring(ldb,
2132 "samldb: Change from security/distribution global group forbidden!");
2133 return LDB_ERR_UNWILLING_TO_PERFORM;
2134 }
2135 break;
2136
2137 case GTYPE_SECURITY_BUILTIN_LOCAL_GROUP:
2138 default:
2139 /* we don't allow this "groupType" values */
2140 return LDB_ERR_UNWILLING_TO_PERFORM;
2141 break;
2142 }
2143 }
2144
2145 account_type = ds_gtype2atype(group_type);
2146 if (account_type == 0) {
2147 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
2148 return LDB_ERR_UNWILLING_TO_PERFORM;
2149 }
2150 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType",
2151 account_type);
2152 if (ret != LDB_SUCCESS) {
2153 return ret;
2154 }
2155 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
2156 el->flags = LDB_FLAG_MOD_REPLACE;
2157
2158 return LDB_SUCCESS;
2159 }
2160
2161 static int samldb_sam_accountname_check(struct samldb_ctx *ac)
2162 {
2163 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2164 const char * const no_attrs[] = { NULL };
2165 struct ldb_result *res;
2166 const char *sam_accountname, *enc_str;
2167 struct ldb_message_element *el;
2168 struct ldb_message *tmp_msg;
2169 int ret;
2170
2171 el = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
2172 ac->req->operation);
2173 if (el == NULL) {
2174 /* we are not affected */
2175 return LDB_SUCCESS;
2176 }
2177
2178 /* Create a temporary message for fetching the "sAMAccountName" */
2179 tmp_msg = ldb_msg_new(ac->msg);
2180 if (tmp_msg == NULL) {
2181 return ldb_module_oom(ac->module);
2182 }
2183 ret = ldb_msg_add(tmp_msg, el, 0);
2184 if (ret != LDB_SUCCESS) {
2185 return ret;
2186 }
2187
2188 /* We must not steal the original string, it belongs to the caller! */
2189 sam_accountname = talloc_strdup(ac,
2190 ldb_msg_find_attr_as_string(tmp_msg, "sAMAccountName", NULL));
2191 talloc_free(tmp_msg);
2192
2193 if (sam_accountname == NULL) {
2194 /* The "sAMAccountName" cannot be nothing */
2195 ldb_set_errstring(ldb,
2196 "samldb: Empty account names aren't allowed!");
2197 return LDB_ERR_UNWILLING_TO_PERFORM;
2198 }
2199
2200 enc_str = ldb_binary_encode_string(ac, sam_accountname);
2201 if (enc_str == NULL) {
2202 return ldb_module_oom(ac->module);
2203 }
2204
2205 /* Make sure that a "sAMAccountName" is only used once */
2206
2207 ret = dsdb_module_search(ac->module, ac, &res,
2208 ldb_get_default_basedn(ldb),
2209 LDB_SCOPE_SUBTREE, no_attrs,
2210 DSDB_FLAG_NEXT_MODULE, ac->req,
2211 "(sAMAccountName=%s)", enc_str);
2212 if (ret != LDB_SUCCESS) {
2213 return ret;
2214 }
2215 if (res->count > 1) {
2216 return ldb_operr(ldb);
2217 } else if (res->count == 1) {
2218 if (ldb_dn_compare(res->msgs[0]->dn, ac->msg->dn) != 0) {
2219 ldb_asprintf_errstring(ldb,
2220 "samldb: Account name (sAMAccountName) '%s' already in use!",
2221 sam_accountname);
2222 return LDB_ERR_ENTRY_ALREADY_EXISTS;
2223 }
2224 }
2225 talloc_free(res);
2226
2227 return LDB_SUCCESS;
2228 }
2229
2230 static int samldb_member_check(struct samldb_ctx *ac)
2231 {
2232 const char * const attrs[] = { "objectSid", NULL };
2233 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2234 struct ldb_message_element *el;
2235 struct ldb_dn *member_dn;
2236 struct dom_sid *sid;
2237 struct ldb_result *res;
2238 struct dom_sid *group_sid;
2239 unsigned int i, j;
2240 int ret;
2241
2242 /* Fetch information from the existing object */
2243
2244 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
2245 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED, ac->req, NULL);
2246 if (ret != LDB_SUCCESS) {
2247 return ret;
2248 }
2249 if (res->count != 1) {
2250 return ldb_operr(ldb);
2251 }
2252
2253 group_sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
2254 if (group_sid == NULL) {
2255 return ldb_operr(ldb);
2256 }
2257
2258 /* We've to walk over all modification entries and consider the "member"
2259 * ones. */
2260 for (i = 0; i < ac->msg->num_elements; i++) {
2261 if (ldb_attr_cmp(ac->msg->elements[i].name, "member") != 0) {
2262 continue;
2263 }
2264
2265 el = &ac->msg->elements[i];
2266 for (j = 0; j < el->num_values; j++) {
2267 struct ldb_result *group_res;
2268 const char *group_attrs[] = { "primaryGroupID" , NULL };
2269 uint32_t prim_group_rid;
2270
2271 if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE) {
2272 /* Deletes will be handled in
2273 * repl_meta_data, and deletes not
2274 * matching a member will return
2275 * LDB_ERR_UNWILLING_TO_PERFORM
2276 * there */
2277 continue;
2278 }
2279
2280 member_dn = ldb_dn_from_ldb_val(ac, ldb,
2281 &el->values[j]);
2282 if (!ldb_dn_validate(member_dn)) {
2283 return ldb_operr(ldb);
2284 }
2285
2286 /* Denies to add "member"s to groups which are primary
2287 * ones for them - in this case return
2288 * ERR_ENTRY_ALREADY_EXISTS. */
2289
2290 ret = dsdb_module_search_dn(ac->module, ac, &group_res,
2291 member_dn, group_attrs,
2292 DSDB_FLAG_NEXT_MODULE, ac->req);
2293 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
2294 /* member DN doesn't exist yet */
2295 continue;
2296 }
2297 if (ret != LDB_SUCCESS) {
2298 return ret;
2299 }
2300 prim_group_rid = ldb_msg_find_attr_as_uint(group_res->msgs[0], "primaryGroupID", (uint32_t)-1);
2301 if (prim_group_rid == (uint32_t) -1) {
2302 /* the member hasn't to be a user account ->
2303 * therefore no check needed in this case. */
2304 continue;
2305 }
2306
2307 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb),
2308 prim_group_rid);
2309 if (sid == NULL) {
2310 return ldb_operr(ldb);
2311 }
2312
2313 if (dom_sid_equal(group_sid, sid)) {
2314 ldb_asprintf_errstring(ldb,
2315 "samldb: member %s already set via primaryGroupID %u",
2316 ldb_dn_get_linearized(member_dn), prim_group_rid);
2317 return LDB_ERR_ENTRY_ALREADY_EXISTS;
2318 }
2319 }
2320 }
2321
2322 talloc_free(res);
2323
2324 return LDB_SUCCESS;
2325 }
2326
2327 /* SAM objects have special rules regarding the "description" attribute on
2328 * modify operations. */
2329 static int samldb_description_check(struct samldb_ctx *ac, bool *modified)
2330 {
2331 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2332 const char * const attrs[] = { "objectClass", "description", NULL };
2333 struct ldb_result *res;
2334 unsigned int i;
2335 int ret;
2336
2337 /* Fetch information from the existing object */
2338 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
2339 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED, ac->req,
2340 "(|(objectclass=user)(objectclass=group)(objectclass=samDomain)(objectclass=samServer))");
2341 if (ret != LDB_SUCCESS) {
2342 /* don't treat it specially ... let normal error codes
2343 happen from other places */
2344 ldb_reset_err_string(ldb);
2345 return LDB_SUCCESS;
2346 }
2347 if (res->count == 0) {
2348 /* we didn't match the filter */
2349 talloc_free(res);
2350 return LDB_SUCCESS;
2351 }
2352
2353 /* We've to walk over all modification entries and consider the
2354 * "description" ones. */
2355 for (i = 0; i < ac->msg->num_elements; i++) {
2356 if (ldb_attr_cmp(ac->msg->elements[i].name, "description") == 0) {
2357 ac->msg->elements[i].flags |= LDB_FLAG_INTERNAL_FORCE_SINGLE_VALUE_CHECK;
2358 *modified = true;
2359 }
2360 }
2361
2362 talloc_free(res);
2363
2364 return LDB_SUCCESS;
2365 }
2366
2367 /* This trigger adapts the "servicePrincipalName" attributes if the
2368 * "dNSHostName" and/or "sAMAccountName" attribute change(s) */
2369 static int samldb_service_principal_names_change(struct samldb_ctx *ac)
2370 {
2371 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2372 struct ldb_message_element *el = NULL, *el2 = NULL;
2373 struct ldb_message *msg;
2374 const char * const attrs[] = { "servicePrincipalName", NULL };
2375 struct ldb_result *res;
2376 const char *dns_hostname = NULL, *old_dns_hostname = NULL,
2377 *sam_accountname = NULL, *old_sam_accountname = NULL;
2378 unsigned int i, j;
2379 int ret;
2380
2381 el = dsdb_get_single_valued_attr(ac->msg, "dNSHostName",
2382 ac->req->operation);
2383 el2 = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
2384 ac->req->operation);
2385 if ((el == NULL) && (el2 == NULL)) {
2386 /* we are not affected */
2387 return LDB_SUCCESS;
2388 }
2389
2390 /* Create a temporary message for fetching the "dNSHostName" */
2391 if (el != NULL) {
2392 const char *dns_attrs[] = { "dNSHostName", NULL };
2393 msg = ldb_msg_new(ac->msg);
2394 if (msg == NULL) {
2395 return ldb_module_oom(ac->module);
2396 }
2397 ret = ldb_msg_add(msg, el, 0);
2398 if (ret != LDB_SUCCESS) {
2399 return ret;
2400 }
2401 dns_hostname = talloc_strdup(ac,
2402 ldb_msg_find_attr_as_string(msg, "dNSHostName", NULL));
2403 if (dns_hostname == NULL) {
2404 return ldb_module_oom(ac->module);
2405 }
2406
2407 talloc_free(msg);
2408
2409 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn,
2410 dns_attrs, DSDB_FLAG_NEXT_MODULE, ac->req);
2411 if (ret == LDB_SUCCESS) {
2412 old_dns_hostname = ldb_msg_find_attr_as_string(res->msgs[0], "dNSHostName", NULL);
2413 }
2414 }
2415
2416 /* Create a temporary message for fetching the "sAMAccountName" */
2417 if (el2 != NULL) {
2418 char *tempstr, *tempstr2 = NULL;
2419 const char *acct_attrs[] = { "sAMAccountName", NULL };
2420
2421 msg = ldb_msg_new(ac->msg);
2422 if (msg == NULL) {
2423 return ldb_module_oom(ac->module);
2424 }
2425 ret = ldb_msg_add(msg, el2, 0);
2426 if (ret != LDB_SUCCESS) {
2427 return ret;
2428 }
2429 tempstr = talloc_strdup(ac,
2430 ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL));
2431 talloc_free(msg);
2432
2433 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, acct_attrs,
2434 DSDB_FLAG_NEXT_MODULE, ac->req);
2435 if (ret == LDB_SUCCESS) {
2436 tempstr2 = talloc_strdup(ac,
2437 ldb_msg_find_attr_as_string(res->msgs[0],
2438 "sAMAccountName", NULL));
2439 }
2440
2441
2442 /* The "sAMAccountName" needs some additional trimming: we need
2443 * to remove the trailing "$"s if they exist. */
2444 if ((tempstr != NULL) && (tempstr[0] != '\0') &&
2445 (tempstr[strlen(tempstr) - 1] == '$')) {
2446 tempstr[strlen(tempstr) - 1] = '\0';
2447 }
2448 if ((tempstr2 != NULL) && (tempstr2[0] != '\0') &&
2449 (tempstr2[strlen(tempstr2) - 1] == '$')) {
2450 tempstr2[strlen(tempstr2) - 1] = '\0';
2451 }
2452 sam_accountname = tempstr;
2453 old_sam_accountname = tempstr2;
2454 }
2455
2456 if (old_dns_hostname == NULL) {
2457 /* we cannot change when the old name is unknown */
2458 dns_hostname = NULL;
2459 }
2460 if ((old_dns_hostname != NULL) && (dns_hostname != NULL) &&
2461 (strcasecmp_m(old_dns_hostname, dns_hostname) == 0)) {
2462 /* The "dNSHostName" didn't change */
2463 dns_hostname = NULL;
2464 }
2465
2466 if (old_sam_accountname == NULL) {
2467 /* we cannot change when the old name is unknown */
2468 sam_accountname = NULL;
2469 }
2470 if ((old_sam_accountname != NULL) && (sam_accountname != NULL) &&
2471 (strcasecmp_m(old_sam_accountname, sam_accountname) == 0)) {
2472 /* The "sAMAccountName" didn't change */
2473 sam_accountname = NULL;
2474 }
2475
2476 if ((dns_hostname == NULL) && (sam_accountname == NULL)) {
2477 /* Well, there are information missing (old name(s)) or the
2478 * names didn't change. We've nothing to do and can exit here */
2479 return LDB_SUCCESS;
2480 }
2481
2482 /* Potential "servicePrincipalName" changes in the same request have to
2483 * be handled before the update (Windows behaviour). */
2484 el = ldb_msg_find_element(ac->msg, "servicePrincipalName");
2485 if (el != NULL) {
2486 msg = ldb_msg_new(ac->msg);
2487 if (msg == NULL) {
2488 return ldb_module_oom(ac->module);
2489 }
2490 msg->dn = ac->msg->dn;
2491
2492 do {
2493 ret = ldb_msg_add(msg, el, el->flags);
2494 if (ret != LDB_SUCCESS) {
2495 return ret;
2496 }
2497
2498 ldb_msg_remove_element(ac->msg, el);
2499
2500 el = ldb_msg_find_element(ac->msg,
2501 "servicePrincipalName");
2502 } while (el != NULL);
2503
2504 ret = dsdb_module_modify(ac->module, msg,
2505 DSDB_FLAG_NEXT_MODULE, ac->req);
2506 if (ret != LDB_SUCCESS) {
2507 return ret;
2508 }
2509 talloc_free(msg);
2510 }
2511
2512 /* Fetch the "servicePrincipalName"s if any */
2513 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
2514 DSDB_FLAG_NEXT_MODULE, ac->req, NULL);
2515 if (ret != LDB_SUCCESS) {
2516 return ret;
2517 }
2518 if ((res->count != 1) || (res->msgs[0]->num_elements > 1)) {
2519 return ldb_operr(ldb);
2520 }
2521
2522 if (res->msgs[0]->num_elements == 1) {
2523 /*
2524 * Yes, we do have "servicePrincipalName"s. First we update them
2525 * locally, that means we do always substitute the current
2526 * "dNSHostName" with the new one and/or "sAMAccountName"
2527 * without "$" with the new one and then we append the
2528 * modified "servicePrincipalName"s as a message element
2529 * replace to the modification request (Windows behaviour). We
2530 * need also to make sure that the values remain case-
2531 * insensitively unique.
2532 */
2533
2534 ret = ldb_msg_add_empty(ac->msg, "servicePrincipalName",
2535 LDB_FLAG_MOD_REPLACE, &el);
2536 if (ret != LDB_SUCCESS) {
2537 return ret;
2538 }
2539
2540 for (i = 0; i < res->msgs[0]->elements[0].num_values; i++) {
2541 char *old_str, *new_str, *pos;
2542 const char *tok;
2543 struct ldb_val *vals;
2544 bool found = false;
2545
2546 old_str = (char *)
2547 res->msgs[0]->elements[0].values[i].data;
2548
2549 new_str = talloc_strdup(ac->msg,
2550 strtok_r(old_str, "/", &pos));
2551 if (new_str == NULL) {
2552 return ldb_module_oom(ac->module);
2553 }
2554
2555 while ((tok = strtok_r(NULL, "/", &pos)) != NULL) {
2556 if ((dns_hostname != NULL) &&
2557 (strcasecmp_m(tok, old_dns_hostname) == 0)) {
2558 tok = dns_hostname;
2559 }
2560 if ((sam_accountname != NULL) &&
2561 (strcasecmp_m(tok, old_sam_accountname) == 0)) {
2562 tok = sam_accountname;
2563 }
2564
2565 new_str = talloc_asprintf(ac->msg, "%s/%s",
2566 new_str, tok);
2567 if (new_str == NULL) {
2568 return ldb_module_oom(ac->module);
2569 }
2570 }
2571
2572 /* Uniqueness check */
2573 for (j = 0; (!found) && (j < el->num_values); j++) {
2574 if (strcasecmp_m((char *)el->values[j].data,
2575 new_str) == 0) {
2576 found = true;
2577 }
2578 }
2579 if (found) {
2580 continue;
2581 }
2582
2583 /*
2584 * append the new "servicePrincipalName" -
2585 * code derived from ldb_msg_add_value().
2586 *
2587 * Open coded to make it clear that we must
2588 * append to the MOD_REPLACE el created above.
2589 */
2590 vals = talloc_realloc(ac->msg, el->values,
2591 struct ldb_val,
2592 el->num_values + 1);
2593 if (vals == NULL) {
2594 return ldb_module_oom(ac->module);
2595 }
2596 el->values = vals;
2597 el->values[el->num_values] = data_blob_string_const(new_str);
2598 ++(el->num_values);
2599 }
2600 }
2601
2602 talloc_free(res);
2603
2604 return LDB_SUCCESS;
2605 }
2606
2607 /* This checks the "fSMORoleOwner" attributes */
2608 static int samldb_fsmo_role_owner_check(struct samldb_ctx *ac)
2609 {
2610 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2611 const char * const no_attrs[] = { NULL };
2612 struct ldb_message_element *el;
2613 struct ldb_message *tmp_msg;
2614 struct ldb_dn *res_dn;
2615 struct ldb_result *res;
2616 int ret;
2617
2618 el = dsdb_get_single_valued_attr(ac->msg, "fSMORoleOwner",
2619 ac->req->operation);
2620 if (el == NULL) {
2621 /* we are not affected */
2622 return LDB_SUCCESS;
2623 }
2624
2625 /* Create a temporary message for fetching the "fSMORoleOwner" */
2626 tmp_msg = ldb_msg_new(ac->msg);
2627 if (tmp_msg == NULL) {
2628 return ldb_module_oom(ac->module);
2629 }
2630 ret = ldb_msg_add(tmp_msg, el, 0);
2631 if (ret != LDB_SUCCESS) {
2632 return ret;
2633 }
2634 res_dn = ldb_msg_find_attr_as_dn(ldb, ac, tmp_msg, "fSMORoleOwner");
2635 talloc_free(tmp_msg);
2636
2637 if (res_dn == NULL) {
2638 ldb_set_errstring(ldb,
2639 "samldb: 'fSMORoleOwner' attributes have to reference 'nTDSDSA' entries!");
2640 if (ac->req->operation == LDB_ADD) {
2641 return LDB_ERR_CONSTRAINT_VIOLATION;
2642 } else {
2643 return LDB_ERR_UNWILLING_TO_PERFORM;
2644 }
2645 }
2646
2647 /* Fetched DN has to reference a "nTDSDSA" entry */
2648 ret = dsdb_module_search(ac->module, ac, &res, res_dn, LDB_SCOPE_BASE,
2649 no_attrs,
2650 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
2651 ac->req, "(objectClass=nTDSDSA)");
2652 if (ret != LDB_SUCCESS) {
2653 return ret;
2654 }
2655 if (res->count != 1) {
2656 ldb_set_errstring(ldb,
2657 "samldb: 'fSMORoleOwner' attributes have to reference 'nTDSDSA' entries!");
2658 return LDB_ERR_UNWILLING_TO_PERFORM;
2659 }
2660
2661 talloc_free(res);
2662
2663 return LDB_SUCCESS;
2664 }
2665
2666
2667 /* add */
2668 static int samldb_add(struct ldb_module *module, struct ldb_request *req)
2669 {
2670 struct ldb_context *ldb;
2671 struct samldb_ctx *ac;
2672 struct ldb_message_element *el;
2673 int ret;
2674
2675 ldb = ldb_module_get_ctx(module);
2676 ldb_debug(ldb, LDB_DEBUG_TRACE, "samldb_add\n");
2677
2678 /* do not manipulate our control entries */
2679 if (ldb_dn_is_special(req->op.add.message->dn)) {
2680 return ldb_next_request(module, req);
2681 }
2682
2683 el = ldb_msg_find_element(req->op.add.message, "userParameters");
2684 if (el != NULL && ldb_req_is_untrusted(req)) {
2685 const char *reason = "samldb_add: "
2686 "setting userParameters is not supported over LDAP, "
2687 "see https://bugzilla.samba.org/show_bug.cgi?id=8077";
2688 ldb_debug(ldb, LDB_DEBUG_WARNING, "%s", reason);
2689 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, reason);
2690 }
2691
2692 ac = samldb_ctx_init(module, req);
2693 if (ac == NULL) {
2694 return ldb_operr(ldb);
2695 }
2696
2697 /* build the new msg */
2698 ac->msg = ldb_msg_copy_shallow(ac, req->op.add.message);
2699 if (ac->msg == NULL) {
2700 talloc_free(ac);
2701 ldb_debug(ldb, LDB_DEBUG_FATAL,
2702 "samldb_add: ldb_msg_copy_shallow failed!\n");
2703 return ldb_operr(ldb);
2704 }
2705
2706 el = ldb_msg_find_element(ac->msg, "fSMORoleOwner");
2707 if (el != NULL) {
2708 ret = samldb_fsmo_role_owner_check(ac);
2709 if (ret != LDB_SUCCESS) {
2710 return ret;
2711 }
2712 }
2713
2714 if (samdb_find_attribute(ldb, ac->msg,
2715 "objectclass", "user") != NULL) {
2716 ac->type = SAMLDB_TYPE_USER;
2717
2718 ret = samldb_prim_group_trigger(ac);
2719 if (ret != LDB_SUCCESS) {
2720 return ret;
2721 }
2722
2723 ret = samldb_objectclass_trigger(ac);
2724 if (ret != LDB_SUCCESS) {
2725 return ret;
2726 }
2727
2728 return samldb_fill_object(ac);
2729 }
2730
2731 if (samdb_find_attribute(ldb, ac->msg,
2732 "objectclass", "group") != NULL) {
2733 ac->type = SAMLDB_TYPE_GROUP;
2734
2735 ret = samldb_objectclass_trigger(ac);
2736 if (ret != LDB_SUCCESS) {
2737 return ret;
2738 }
2739
2740 return samldb_fill_object(ac);
2741 }
2742
2743 /* perhaps a foreignSecurityPrincipal? */
2744 if (samdb_find_attribute(ldb, ac->msg,
2745 "objectclass",
2746 "foreignSecurityPrincipal") != NULL) {
2747 return samldb_fill_foreignSecurityPrincipal_object(ac);
2748 }
2749
2750 if (samdb_find_attribute(ldb, ac->msg,
2751 "objectclass", "classSchema") != NULL) {
2752 ret = samldb_schema_info_update(ac);
2753 if (ret != LDB_SUCCESS) {
2754 talloc_free(ac);
2755 return ret;
2756 }
2757
2758 ac->type = SAMLDB_TYPE_CLASS;
2759 return samldb_fill_object(ac);
2760 }
2761
2762 if (samdb_find_attribute(ldb, ac->msg,
2763 "objectclass", "attributeSchema") != NULL) {
2764 ret = samldb_schema_info_update(ac);
2765 if (ret != LDB_SUCCESS) {
2766 talloc_free(ac);
2767 return ret;
2768 }
2769
2770 ac->type = SAMLDB_TYPE_ATTRIBUTE;
2771 return samldb_fill_object(ac);
2772 }
2773
2774 talloc_free(ac);
2775
2776 /* nothing matched, go on */
2777 return ldb_next_request(module, req);
2778 }
2779
2780 /* modify */
2781 static int samldb_modify(struct ldb_module *module, struct ldb_request *req)
2782 {
2783 struct ldb_context *ldb;
2784 struct samldb_ctx *ac;
2785 struct ldb_message_element *el, *el2;
2786 bool modified = false;
2787 int ret;
2788
2789 if (ldb_dn_is_special(req->op.mod.message->dn)) {
2790 /* do not manipulate our control entries */
2791 return ldb_next_request(module, req);
2792 }
2793
2794 ldb = ldb_module_get_ctx(module);
2795
2796 /* make sure that "objectSid" is not specified */
2797 el = ldb_msg_find_element(req->op.mod.message, "objectSid");
2798 if (el != NULL) {
2799 if (ldb_request_get_control(req, LDB_CONTROL_PROVISION_OID) == NULL) {
2800 ldb_set_errstring(ldb,
2801 "samldb: objectSid must not be specified!");
2802 return LDB_ERR_UNWILLING_TO_PERFORM;
2803 }
2804 }
2805 /* make sure that "sAMAccountType" is not specified */
2806 el = ldb_msg_find_element(req->op.mod.message, "sAMAccountType");
2807 if (el != NULL) {
2808 ldb_set_errstring(ldb,
2809 "samldb: sAMAccountType must not be specified!");
2810 return LDB_ERR_UNWILLING_TO_PERFORM;
2811 }
2812 /* make sure that "isCriticalSystemObject" is not specified */
2813 el = ldb_msg_find_element(req->op.mod.message, "isCriticalSystemObject");
2814 if (el != NULL) {
2815 if (ldb_request_get_control(req, LDB_CONTROL_RELAX_OID) == NULL) {
2816 ldb_set_errstring(ldb,
2817 "samldb: isCriticalSystemObject must not be specified!");
2818 return LDB_ERR_UNWILLING_TO_PERFORM;
2819 }
2820 }
2821
2822 /* msDS-IntId is not allowed to be modified
2823 * except when modification comes from replication */
2824 if (ldb_msg_find_element(req->op.mod.message, "msDS-IntId")) {
2825 if (!ldb_request_get_control(req,
2826 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
2827 return LDB_ERR_CONSTRAINT_VIOLATION;
2828 }
2829 }
2830
2831 el = ldb_msg_find_element(req->op.mod.message, "userParameters");
2832 if (el != NULL && ldb_req_is_untrusted(req)) {
2833 const char *reason = "samldb: "
2834 "setting userParameters is not supported over LDAP, "
2835 "see https://bugzilla.samba.org/show_bug.cgi?id=8077";
2836 ldb_debug(ldb, LDB_DEBUG_WARNING, "%s", reason);
2837 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, reason);
2838 }
2839
2840 ac = samldb_ctx_init(module, req);
2841 if (ac == NULL) {
2842 return ldb_operr(ldb);
2843 }
2844
2845 /* build the new msg */
2846 ac->msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
2847 if (ac->msg == NULL) {
2848 talloc_free(ac);
2849 ldb_debug(ldb, LDB_DEBUG_FATAL,
2850 "samldb_modify: ldb_msg_copy_shallow failed!\n");
2851 return ldb_operr(ldb);
2852 }
2853
2854 el = ldb_msg_find_element(ac->msg, "primaryGroupID");
2855 if (el != NULL) {
2856 ret = samldb_prim_group_trigger(ac);
2857 if (ret != LDB_SUCCESS) {
2858 return ret;
2859 }
2860 }
2861
2862 el = ldb_msg_find_element(ac->msg, "userAccountControl");
2863 if (el != NULL) {
2864 modified = true;
2865 ret = samldb_user_account_control_change(ac);
2866 if (ret != LDB_SUCCESS) {
2867 return ret;
2868 }
2869 }
2870
2871 el = ldb_msg_find_element(ac->msg, "lockoutTime");
2872 if (el != NULL) {
2873 modified = true;
2874 ret = samldb_lockout_time(ac);
2875 if (ret != LDB_SUCCESS) {
2876 return ret;
2877 }
2878 }
2879
2880 el = ldb_msg_find_element(ac->msg, "groupType");
2881 if (el != NULL) {
2882 modified = true;
2883 ret = samldb_group_type_change(ac);
2884 if (ret != LDB_SUCCESS) {
2885 return ret;
2886 }
2887 }
2888
2889 el = ldb_msg_find_element(ac->msg, "sAMAccountName");
2890 if (el != NULL) {
2891 ret = samldb_sam_accountname_check(ac);
2892 if (ret != LDB_SUCCESS) {
2893 return ret;
2894 }
2895 }
2896
2897 el = ldb_msg_find_element(ac->msg, "member");
2898 if (el != NULL) {
2899 ret = samldb_member_check(ac);
2900 if (ret != LDB_SUCCESS) {
2901 return ret;
2902 }
2903 }
2904
2905 el = ldb_msg_find_element(ac->msg, "description");
2906 if (el != NULL) {
2907 ret = samldb_description_check(ac, &modified);
2908 if (ret != LDB_SUCCESS) {
2909 return ret;
2910 }
2911 }
2912
2913 el = ldb_msg_find_element(ac->msg, "dNSHostName");
2914 el2 = ldb_msg_find_element(ac->msg, "sAMAccountName");
2915 if ((el != NULL) || (el2 != NULL)) {
2916 modified = true;
2917 ret = samldb_service_principal_names_change(ac);
2918 if (ret != LDB_SUCCESS) {
2919 return ret;
2920 }
2921 }
2922
2923 el = ldb_msg_find_element(ac->msg, "fSMORoleOwner");
2924 if (el != NULL) {
2925 ret = samldb_fsmo_role_owner_check(ac);
2926 if (ret != LDB_SUCCESS) {
2927 return ret;
2928 }
2929 }
2930
2931 if (modified) {
2932 struct ldb_request *child_req;
2933
2934 /* Now perform the real modifications as a child request */
2935 ret = ldb_build_mod_req(&child_req, ldb, ac,
2936 ac->msg,
2937 req->controls,
2938 req, dsdb_next_callback,
2939 req);
2940 LDB_REQ_SET_LOCATION(child_req);
2941 if (ret != LDB_SUCCESS) {
2942 return ret;
2943 }
2944
2945 return ldb_next_request(module, child_req);
2946 }
2947
2948 talloc_free(ac);
2949
2950 /* no change which interests us, go on */
2951 return ldb_next_request(module, req);
2952 }
2953
2954 /* delete */
2955
2956 static int samldb_prim_group_users_check(struct samldb_ctx *ac)
2957 {
2958 struct ldb_context *ldb;
2959 struct dom_sid *sid;
2960 uint32_t rid;
2961 NTSTATUS status;
2962 int ret;
2963 struct ldb_result *res;
2964 const char * const attrs[] = { "objectSid", "isDeleted", NULL };
2965 const char * const noattrs[] = { NULL };
2966
2967 ldb = ldb_module_get_ctx(ac->module);
2968
2969 /* Finds out the SID/RID of the SAM object */
2970 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->req->op.del.dn,
2971 attrs,
2972 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
2973 ac->req);
2974 if (ret != LDB_SUCCESS) {
2975 return ret;
2976 }
2977
2978 if (ldb_msg_check_string_attribute(res->msgs[0], "isDeleted", "TRUE")) {
2979 return LDB_SUCCESS;
2980 }
2981
2982 sid = samdb_result_dom_sid(ac, res->msgs[0], "objectSid");
2983 if (sid == NULL) {
2984 /* No SID - it might not be a SAM object - therefore ok */
2985 return LDB_SUCCESS;
2986 }
2987 status = dom_sid_split_rid(ac, sid, NULL, &rid);
2988 if (!NT_STATUS_IS_OK(status)) {
2989 return ldb_operr(ldb);
2990 }
2991 if (rid == 0) {
2992 /* Special object (security principal?) */
2993 return LDB_SUCCESS;
2994 }
2995 /* do not allow deletion of well-known sids */
2996 if (rid < DSDB_SAMDB_MINIMUM_ALLOWED_RID &&
2997 (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) == NULL)) {
2998 return LDB_ERR_OTHER;
2999 }
3000
3001 /* Deny delete requests from groups which are primary ones */
3002 ret = dsdb_module_search(ac->module, ac, &res,
3003 ldb_get_default_basedn(ldb),
3004 LDB_SCOPE_SUBTREE, noattrs,
3005 DSDB_FLAG_NEXT_MODULE,
3006 ac->req,
3007 "(&(primaryGroupID=%u)(objectClass=user))", rid);
3008 if (ret != LDB_SUCCESS) {
3009 return ret;
3010 }
3011 if (res->count > 0) {
3012 return LDB_ERR_ENTRY_ALREADY_EXISTS;
3013 }
3014
3015 return LDB_SUCCESS;
3016 }
3017
3018 static int samldb_delete(struct ldb_module *module, struct ldb_request *req)
3019 {
3020 struct samldb_ctx *ac;
3021 int ret;
3022
3023 if (ldb_dn_is_special(req->op.del.dn)) {
3024 /* do not manipulate our control entries */
3025 return ldb_next_request(module, req);
3026 }
3027
3028 ac = samldb_ctx_init(module, req);
3029 if (ac == NULL) {
3030 return ldb_operr(ldb_module_get_ctx(module));
3031 }
3032
3033 ret = samldb_prim_group_users_check(ac);
3034 if (ret != LDB_SUCCESS) {
3035 return ret;
3036 }
3037
3038 talloc_free(ac);
3039
3040 return ldb_next_request(module, req);
3041 }
3042
3043 /* rename */
3044
3045 static int check_rename_constraints(struct ldb_message *msg,
3046 struct samldb_ctx *ac,
3047 struct ldb_dn *olddn, struct ldb_dn *newdn)
3048 {
3049 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
3050 struct ldb_dn *dn1, *dn2, *nc_root;
3051 int32_t systemFlags;
3052 bool move_op = false;
3053 bool rename_op = false;
3054 int ret;
3055
3056 /* Skip the checks if old and new DN are the same, or if we have the
3057 * relax control specified or if the returned objects is already
3058 * deleted and needs only to be moved for consistency. */
3059
3060 if (ldb_dn_compare(olddn, newdn) == 0) {
3061 return LDB_SUCCESS;
3062 }
3063 if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) != NULL) {
3064 return LDB_SUCCESS;
3065 }
3066 if (ldb_msg_find_attr_as_bool(msg, "isDeleted", false)) {
3067 return LDB_SUCCESS;
3068 }
3069
3070 /* Objects under CN=System */
3071
3072 dn1 = ldb_dn_copy(ac, ldb_get_default_basedn(ldb));
3073 if (dn1 == NULL) return ldb_oom(ldb);
3074
3075 if ( ! ldb_dn_add_child_fmt(dn1, "CN=System")) {
3076 talloc_free(dn1);
3077 return LDB_ERR_OPERATIONS_ERROR;
3078 }
3079
3080 if ((ldb_dn_compare_base(dn1, olddn) == 0) &&
3081 (ldb_dn_compare_base(dn1, newdn) != 0)) {
3082 talloc_free(dn1);
3083 ldb_asprintf_errstring(ldb,
3084 "subtree_rename: Cannot move/rename %s. Objects under CN=System have to stay under it!",
3085 ldb_dn_get_linearized(olddn));
3086 return LDB_ERR_OTHER;
3087 }
3088
3089 talloc_free(dn1);
3090
3091 /* LSA objects */
3092
3093 if ((samdb_find_attribute(ldb, msg, "objectClass", "secret") != NULL) ||
3094 (samdb_find_attribute(ldb, msg, "objectClass", "trustedDomain") != NULL)) {
3095 ldb_asprintf_errstring(ldb,
3096 "subtree_rename: Cannot move/rename %s. It's an LSA-specific object!",
3097 ldb_dn_get_linearized(olddn));
3098 return LDB_ERR_UNWILLING_TO_PERFORM;
3099 }
3100
3101 /* systemFlags */
3102
3103 dn1 = ldb_dn_get_parent(ac, olddn);
3104 if (dn1 == NULL) return ldb_oom(ldb);
3105 dn2 = ldb_dn_get_parent(ac, newdn);
3106 if (dn2 == NULL) return ldb_oom(ldb);
3107
3108 if (ldb_dn_compare(dn1, dn2) == 0) {
3109 rename_op = true;
3110 } else {
3111 move_op = true;
3112 }
3113
3114 talloc_free(dn1);
3115 talloc_free(dn2);
3116
3117 systemFlags = ldb_msg_find_attr_as_int(msg, "systemFlags", 0);
3118
3119 /* Fetch name context */
3120
3121 ret = dsdb_find_nc_root(ldb, ac, olddn, &nc_root);
3122 if (ret != LDB_SUCCESS) {
3123 return ret;
3124 }
3125
3126 if (ldb_dn_compare(nc_root, ldb_get_schema_basedn(ldb)) == 0) {
3127 if (move_op) {
3128 ldb_asprintf_errstring(ldb,
3129 "subtree_rename: Cannot move %s within schema partition",
3130 ldb_dn_get_linearized(olddn));
3131 return LDB_ERR_UNWILLING_TO_PERFORM;
3132 }
3133 if (rename_op &&
3134 (systemFlags & SYSTEM_FLAG_SCHEMA_BASE_OBJECT) != 0) {
3135 ldb_asprintf_errstring(ldb,
3136 "subtree_rename: Cannot rename %s within schema partition",
3137 ldb_dn_get_linearized(olddn));
3138 return LDB_ERR_UNWILLING_TO_PERFORM;
3139 }
3140 } else if (ldb_dn_compare(nc_root, ldb_get_config_basedn(ldb)) == 0) {
3141 if (move_op &&
3142 (systemFlags & SYSTEM_FLAG_CONFIG_ALLOW_MOVE) == 0) {
3143 /* Here we have to do more: control the
3144 * "ALLOW_LIMITED_MOVE" flag. This means that the
3145 * grand-grand-parents of two objects have to be equal
3146 * in order to perform the move (this is used for
3147 * moving "server" objects in the "sites" container). */
3148 bool limited_move =
3149 systemFlags & SYSTEM_FLAG_CONFIG_ALLOW_LIMITED_MOVE;
3150
3151 if (limited_move) {
3152 dn1 = ldb_dn_copy(ac, olddn);
3153 if (dn1 == NULL) return ldb_oom(ldb);
3154 dn2 = ldb_dn_copy(ac, newdn);
3155 if (dn2 == NULL) return ldb_oom(ldb);
3156
3157 limited_move &= ldb_dn_remove_child_components(dn1, 3);
3158 limited_move &= ldb_dn_remove_child_components(dn2, 3);
3159 limited_move &= ldb_dn_compare(dn1, dn2) == 0;
3160
3161 talloc_free(dn1);
3162 talloc_free(dn2);
3163 }
3164
3165 if (!limited_move) {
3166 ldb_asprintf_errstring(ldb,
3167 "subtree_rename: Cannot move %s to %s in config partition",
3168 ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
3169 return LDB_ERR_UNWILLING_TO_PERFORM;
3170 }
3171 }
3172 if (rename_op &&
3173 (systemFlags & SYSTEM_FLAG_CONFIG_ALLOW_RENAME) == 0) {
3174 ldb_asprintf_errstring(ldb,
3175 "subtree_rename: Cannot rename %s to %s within config partition",
3176 ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
3177 return LDB_ERR_UNWILLING_TO_PERFORM;
3178 }
3179 } else if (ldb_dn_compare(nc_root, ldb_get_default_basedn(ldb)) == 0) {
3180 if (move_op &&
3181 (systemFlags & SYSTEM_FLAG_DOMAIN_DISALLOW_MOVE) != 0) {
3182 ldb_asprintf_errstring(ldb,
3183 "subtree_rename: Cannot move %s to %s - DISALLOW_MOVE set",
3184 ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
3185 return LDB_ERR_UNWILLING_TO_PERFORM;
3186 }
3187 if (rename_op &&
3188 (systemFlags & SYSTEM_FLAG_DOMAIN_DISALLOW_RENAME) != 0) {
3189 ldb_asprintf_errstring(ldb,
3190 "subtree_rename: Cannot rename %s to %s - DISALLOW_RENAME set",
3191 ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
3192 return LDB_ERR_UNWILLING_TO_PERFORM;
3193 }
3194 }
3195
3196 talloc_free(nc_root);
3197
3198 return LDB_SUCCESS;
3199 }
3200
3201
3202 static int samldb_rename_search_base_callback(struct ldb_request *req,
3203 struct ldb_reply *ares)
3204 {
3205 struct samldb_ctx *ac;
3206 int ret;
3207
3208 ac = talloc_get_type(req->context, struct samldb_ctx);
3209
3210 if (!ares) {
3211 return ldb_module_done(ac->req, NULL, NULL,
3212 LDB_ERR_OPERATIONS_ERROR);
3213 }
3214 if (ares->error != LDB_SUCCESS) {
3215 return ldb_module_done(ac->req, ares->controls,
3216 ares->response, ares->error);
3217 }
3218
3219 switch (ares->type) {
3220 case LDB_REPLY_ENTRY:
3221 /*
3222 * This is the root entry of the originating move
3223 * respectively rename request. It has been already
3224 * stored in the list using "subtree_rename_search()".
3225 * Only this one is subject to constraint checking.
3226 */
3227 ret = check_rename_constraints(ares->message, ac,
3228 ac->req->op.rename.olddn,
3229 ac->req->op.rename.newdn);
3230 if (ret != LDB_SUCCESS) {
3231 return ldb_module_done(ac->req, NULL, NULL,
3232 ret);
3233 }
3234 break;
3235
3236 case LDB_REPLY_REFERRAL:
3237 /* ignore */
3238 break;
3239
3240 case LDB_REPLY_DONE:
3241
3242 /*
3243 * Great, no problem with the rename, so go ahead as
3244 * if we never were here
3245 */
3246 ret = ldb_next_request(ac->module, ac->req);
3247 talloc_free(ares);
3248 return ret;
3249 }
3250
3251 talloc_free(ares);
3252 return LDB_SUCCESS;
3253 }
3254
3255
3256 /* rename */
3257 static int samldb_rename(struct ldb_module *module, struct ldb_request *req)
3258 {
3259 struct ldb_context *ldb;
3260 static const char * const attrs[] = { "objectClass", "systemFlags",
3261 "isDeleted", NULL };
3262 struct ldb_request *search_req;
3263 struct samldb_ctx *ac;
3264 int ret;
3265
3266 if (ldb_dn_is_special(req->op.rename.olddn)) { /* do not manipulate our control entries */
3267 return ldb_next_request(module, req);
3268 }
3269
3270 ldb = ldb_module_get_ctx(module);
3271
3272 ac = samldb_ctx_init(module, req);
3273 if (!ac) {
3274 return ldb_oom(ldb);
3275 }
3276
3277 ret = ldb_build_search_req(&search_req, ldb, ac,
3278 req->op.rename.olddn,
3279 LDB_SCOPE_BASE,
3280 "(objectClass=*)",
3281 attrs,
3282 NULL,
3283 ac,
3284 samldb_rename_search_base_callback,
3285 req);
3286 LDB_REQ_SET_LOCATION(search_req);
3287 if (ret != LDB_SUCCESS) {
3288 return ret;
3289 }
3290
3291 ret = ldb_request_add_control(search_req, LDB_CONTROL_SHOW_RECYCLED_OID,
3292 true, NULL);
3293 if (ret != LDB_SUCCESS) {
3294 return ret;
3295 }
3296
3297 return ldb_next_request(ac->module, search_req);
3298 }
3299
3300 /* extended */
3301
3302 static int samldb_extended_allocate_rid_pool(struct ldb_module *module, struct ldb_request *req)
3303 {
3304 struct ldb_context *ldb = ldb_module_get_ctx(module);
3305 struct dsdb_fsmo_extended_op *exop;
3306 int ret;
3307
3308 exop = talloc_get_type(req->op.extended.data,
3309 struct dsdb_fsmo_extended_op);
3310 if (!exop) {
3311 ldb_set_errstring(ldb,
3312 "samldb_extended_allocate_rid_pool: invalid extended data");
3313 return LDB_ERR_PROTOCOL_ERROR;
3314 }
3315
3316 ret = ridalloc_allocate_rid_pool_fsmo(module, exop, req);
3317 if (ret != LDB_SUCCESS) {
3318 return ret;
3319 }
3320
3321 return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
3322 }
3323
3324 static int samldb_extended(struct ldb_module *module, struct ldb_request *req)
3325 {
3326 if (strcmp(req->op.extended.oid, DSDB_EXTENDED_ALLOCATE_RID_POOL) == 0) {
3327 return samldb_extended_allocate_rid_pool(module, req);
3328 }
3329
3330 return ldb_next_request(module, req);
3331 }
3332
3333
3334 static const struct ldb_module_ops ldb_samldb_module_ops = {
3335 .name = "samldb",
3336 .add = samldb_add,
3337 .modify = samldb_modify,
3338 .del = samldb_delete,
3339 .rename = samldb_rename,
3340 .extended = samldb_extended
3341 };
3342
3343
3344 int ldb_samldb_module_init(const char *version)
3345 {
3346 LDB_MODULE_CHECK_VERSION(version);
3347 return ldb_register_module(&ldb_samldb_module_ops);
3348 }
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