?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
s4:samldb LDB module - fix "isCriticalSystemObject" behaviour
[Samba/gebeck_regimport.git] / source4 / dsdb / samdb / ldb_modules / samldb.c
blobbf91d29709021f764f1a7a976d7208a1d1a1315e
1 /*
2 SAM ldb module
3
4 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
5 Copyright (C) Simo Sorce 2004-2008
6 Copyright (C) Matthias Dieter Wallnöfer 2009-2010
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 /*
23 * Name: ldb
24 *
25 * Component: ldb samldb module
26 *
27 * Description: various internal DSDB triggers - most for SAM specific objects
28 *
29 * Author: Simo Sorce
30 */
31
32 #include "includes.h"
33 #include "libcli/ldap/ldap_ndr.h"
34 #include "ldb_module.h"
35 #include "dsdb/samdb/samdb.h"
36 #include "dsdb/samdb/ldb_modules/util.h"
37 #include "dsdb/samdb/ldb_modules/ridalloc.h"
38 #include "libcli/security/security.h"
39 #include "librpc/gen_ndr/ndr_security.h"
40 #include "ldb_wrap.h"
41 #include "param/param.h"
42 #include "libds/common/flag_mapping.h"
43
44 struct samldb_ctx;
45
46 typedef int (*samldb_step_fn_t)(struct samldb_ctx *);
47
48 struct samldb_step {
49 struct samldb_step *next;
50 samldb_step_fn_t fn;
51 };
52
53 struct samldb_ctx {
54 struct ldb_module *module;
55 struct ldb_request *req;
56
57 /* used for add operations */
58 const char *type;
59
60 /* the resulting message */
61 struct ldb_message *msg;
62
63 /* used in "samldb_find_for_defaultObjectCategory" */
64 struct ldb_dn *dn, *res_dn;
65
66 /* all the async steps necessary to complete the operation */
67 struct samldb_step *steps;
68 struct samldb_step *curstep;
69
70 /* If someone set an ares to forward controls and response back to the caller */
71 struct ldb_reply *ares;
72 };
73
74 static struct samldb_ctx *samldb_ctx_init(struct ldb_module *module,
75 struct ldb_request *req)
76 {
77 struct ldb_context *ldb;
78 struct samldb_ctx *ac;
79
80 ldb = ldb_module_get_ctx(module);
81
82 ac = talloc_zero(req, struct samldb_ctx);
83 if (ac == NULL) {
84 ldb_oom(ldb);
85 return NULL;
86 }
87
88 ac->module = module;
89 ac->req = req;
90
91 return ac;
92 }
93
94 static int samldb_add_step(struct samldb_ctx *ac, samldb_step_fn_t fn)
95 {
96 struct samldb_step *step, *stepper;
97
98 step = talloc_zero(ac, struct samldb_step);
99 if (step == NULL) {
100 return ldb_oom(ldb_module_get_ctx(ac->module));
101 }
102
103 step->fn = fn;
104
105 if (ac->steps == NULL) {
106 ac->steps = step;
107 ac->curstep = step;
108 } else {
109 if (ac->curstep == NULL)
110 return ldb_operr(ldb_module_get_ctx(ac->module));
111 for (stepper = ac->curstep; stepper->next != NULL;
112 stepper = stepper->next);
113 stepper->next = step;
114 }
115
116 return LDB_SUCCESS;
117 }
118
119 static int samldb_first_step(struct samldb_ctx *ac)
120 {
121 if (ac->steps == NULL) {
122 return ldb_operr(ldb_module_get_ctx(ac->module));
123 }
124
125 ac->curstep = ac->steps;
126 return ac->curstep->fn(ac);
127 }
128
129 static int samldb_next_step(struct samldb_ctx *ac)
130 {
131 if (ac->curstep->next) {
132 ac->curstep = ac->curstep->next;
133 return ac->curstep->fn(ac);
134 }
135
136 /* We exit the samldb module here. If someone set an "ares" to forward
137 * controls and response back to the caller, use them. */
138 if (ac->ares) {
139 return ldb_module_done(ac->req, ac->ares->controls,
140 ac->ares->response, LDB_SUCCESS);
141 } else {
142 return ldb_module_done(ac->req, NULL, NULL, LDB_SUCCESS);
143 }
144 }
145
146
147 /* sAMAccountName handling */
148
149 static int samldb_generate_sAMAccountName(struct ldb_context *ldb,
150 struct ldb_message *msg)
151 {
152 char *name;
153
154 /* Format: $000000-000000000000 */
155
156 name = talloc_asprintf(msg, "$%.6X-%.6X%.6X",
157 (unsigned int)generate_random(),
158 (unsigned int)generate_random(),
159 (unsigned int)generate_random());
160 if (name == NULL) {
161 return ldb_oom(ldb);
162 }
163 return ldb_msg_add_steal_string(msg, "sAMAccountName", name);
164 }
165
166 static int samldb_check_sAMAccountName(struct samldb_ctx *ac)
167 {
168 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
169 const char *name;
170 int ret;
171 struct ldb_result *res;
172 const char *noattrs[] = { NULL };
173
174 if (ldb_msg_find_element(ac->msg, "sAMAccountName") == NULL) {
175 ret = samldb_generate_sAMAccountName(ldb, ac->msg);
176 if (ret != LDB_SUCCESS) {
177 return ret;
178 }
179 }
180
181 name = ldb_msg_find_attr_as_string(ac->msg, "sAMAccountName", NULL);
182 if (name == NULL) {
183 /* The "sAMAccountName" cannot be nothing */
184 ldb_set_errstring(ldb,
185 "samldb: Empty account names aren't allowed!");
186 return LDB_ERR_CONSTRAINT_VIOLATION;
187 }
188
189 ret = dsdb_module_search(ac->module, ac, &res,
190 NULL, LDB_SCOPE_SUBTREE, noattrs,
191 DSDB_FLAG_NEXT_MODULE,
192 ac->req,
193 "(sAMAccountName=%s)",
194 ldb_binary_encode_string(ac, name));
195 if (ret != LDB_SUCCESS) {
196 return ret;
197 }
198 if (res->count != 0) {
199 ldb_asprintf_errstring(ldb,
200 "samldb: Account name (sAMAccountName) '%s' already in use!",
201 name);
202 talloc_free(res);
203 return LDB_ERR_ENTRY_ALREADY_EXISTS;
204 }
205 talloc_free(res);
206
207 return samldb_next_step(ac);
208 }
209
210
211 static bool samldb_msg_add_sid(struct ldb_message *msg,
212 const char *name,
213 const struct dom_sid *sid)
214 {
215 struct ldb_val v;
216 enum ndr_err_code ndr_err;
217
218 ndr_err = ndr_push_struct_blob(&v, msg, sid,
219 (ndr_push_flags_fn_t)ndr_push_dom_sid);
220 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
221 return false;
222 }
223 return (ldb_msg_add_value(msg, name, &v, NULL) == 0);
224 }
225
226
227 /* allocate a SID using our RID Set */
228 static int samldb_allocate_sid(struct samldb_ctx *ac)
229 {
230 uint32_t rid;
231 struct dom_sid *sid;
232 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
233 int ret;
234
235 ret = ridalloc_allocate_rid(ac->module, &rid, ac->req);
236 if (ret != LDB_SUCCESS) {
237 return ret;
238 }
239
240 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
241 if (sid == NULL) {
242 return ldb_module_oom(ac->module);
243 }
244
245 if ( ! samldb_msg_add_sid(ac->msg, "objectSid", sid)) {
246 return ldb_operr(ldb);
247 }
248
249 return samldb_next_step(ac);
250 }
251
252 /*
253 see if a krbtgt_number is available
254 */
255 static bool samldb_krbtgtnumber_available(struct samldb_ctx *ac,
256 uint32_t krbtgt_number)
257 {
258 TALLOC_CTX *tmp_ctx = talloc_new(ac);
259 struct ldb_result *res;
260 const char *no_attrs[] = { NULL };
261 int ret;
262
263 ret = dsdb_module_search(ac->module, tmp_ctx, &res, NULL,
264 LDB_SCOPE_SUBTREE, no_attrs,
265 DSDB_FLAG_NEXT_MODULE,
266 ac->req,
267 "(msDC-SecondaryKrbTgtNumber=%u)",
268 krbtgt_number);
269 if (ret == LDB_SUCCESS && res->count == 0) {
270 talloc_free(tmp_ctx);
271 return true;
272 }
273 talloc_free(tmp_ctx);
274 return false;
275 }
276
277 /* special handling for add in RODC join */
278 static int samldb_rodc_add(struct samldb_ctx *ac)
279 {
280 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
281 uint32_t krbtgt_number, i_start, i;
282 int ret;
283 char *newpass;
284 struct ldb_val newpass_utf16;
285
286 /* find a unused msDC-SecondaryKrbTgtNumber */
287 i_start = generate_random() & 0xFFFF;
288 if (i_start == 0) {
289 i_start = 1;
290 }
291
292 for (i=i_start; i<=0xFFFF; i++) {
293 if (samldb_krbtgtnumber_available(ac, i)) {
294 krbtgt_number = i;
295 goto found;
296 }
297 }
298 for (i=1; i<i_start; i++) {
299 if (samldb_krbtgtnumber_available(ac, i)) {
300 krbtgt_number = i;
301 goto found;
302 }
303 }
304
305 ldb_asprintf_errstring(ldb,
306 "%08X: Unable to find available msDS-SecondaryKrbTgtNumber",
307 W_ERROR_V(WERR_NO_SYSTEM_RESOURCES));
308 return LDB_ERR_OTHER;
309
310 found:
311 ret = ldb_msg_add_empty(ac->msg, "msDS-SecondaryKrbTgtNumber",
312 LDB_FLAG_INTERNAL_DISABLE_VALIDATION, NULL);
313 if (ret != LDB_SUCCESS) {
314 return ldb_operr(ldb);
315 }
316
317 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
318 "msDS-SecondaryKrbTgtNumber", krbtgt_number);
319 if (ret != LDB_SUCCESS) {
320 return ldb_operr(ldb);
321 }
322
323 ret = ldb_msg_add_fmt(ac->msg, "sAMAccountName", "krbtgt_%u",
324 krbtgt_number);
325 if (ret != LDB_SUCCESS) {
326 return ldb_operr(ldb);
327 }
328
329 newpass = generate_random_password(ac->msg, 128, 255);
330 if (newpass == NULL) {
331 return ldb_operr(ldb);
332 }
333
334 if (!convert_string_talloc(ac,
335 CH_UNIX, CH_UTF16,
336 newpass, strlen(newpass),
337 (void *)&newpass_utf16.data,
338 &newpass_utf16.length)) {
339 ldb_asprintf_errstring(ldb,
340 "samldb_rodc_add: "
341 "failed to generate UTF16 password from random password");
342 return LDB_ERR_OPERATIONS_ERROR;
343 }
344 ret = ldb_msg_add_steal_value(ac->msg, "clearTextPassword", &newpass_utf16);
345 if (ret != LDB_SUCCESS) {
346 return ldb_operr(ldb);
347 }
348
349 return samldb_next_step(ac);
350 }
351
352 static int samldb_find_for_defaultObjectCategory(struct samldb_ctx *ac)
353 {
354 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
355 struct ldb_result *res;
356 const char *no_attrs[] = { NULL };
357 int ret;
358
359 ac->res_dn = NULL;
360
361 ret = dsdb_module_search(ac->module, ac, &res,
362 ac->dn, LDB_SCOPE_BASE, no_attrs,
363 DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT
364 | DSDB_FLAG_NEXT_MODULE,
365 ac->req,
366 "(objectClass=classSchema)");
367 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
368 /* Don't be pricky when the DN doesn't exist if we have the */
369 /* RELAX control specified */
370 if (ldb_request_get_control(ac->req,
371 LDB_CONTROL_RELAX_OID) == NULL) {
372 ldb_set_errstring(ldb,
373 "samldb_find_defaultObjectCategory: "
374 "Invalid DN for 'defaultObjectCategory'!");
375 return LDB_ERR_CONSTRAINT_VIOLATION;
376 }
377 }
378 if ((ret != LDB_ERR_NO_SUCH_OBJECT) && (ret != LDB_SUCCESS)) {
379 return ret;
380 }
381
382 ac->res_dn = ac->dn;
383
384 return samldb_next_step(ac);
385 }
386
387 /**
388 * msDS-IntId attributeSchema attribute handling
389 * during LDB_ADD request processing
390 */
391 static int samldb_add_handle_msDS_IntId(struct samldb_ctx *ac)
392 {
393 int ret;
394 bool id_exists;
395 uint32_t msds_intid;
396 int32_t system_flags;
397 struct ldb_context *ldb;
398 struct ldb_result *ldb_res;
399 struct ldb_dn *schema_dn;
400
401 ldb = ldb_module_get_ctx(ac->module);
402 schema_dn = ldb_get_schema_basedn(ldb);
403
404 /* replicated update should always go through */
405 if (ldb_request_get_control(ac->req,
406 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
407 return LDB_SUCCESS;
408 }
409
410 /* msDS-IntId is handled by system and should never be
411 * passed by clients */
412 if (ldb_msg_find_element(ac->msg, "msDS-IntId")) {
413 return LDB_ERR_UNWILLING_TO_PERFORM;
414 }
415
416 /* do not generate msDS-IntId if Relax control is passed */
417 if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
418 return LDB_SUCCESS;
419 }
420
421 /* check Functional Level */
422 if (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003) {
423 return LDB_SUCCESS;
424 }
425
426 /* check systemFlags for SCHEMA_BASE_OBJECT flag */
427 system_flags = ldb_msg_find_attr_as_int(ac->msg, "systemFlags", 0);
428 if (system_flags & SYSTEM_FLAG_SCHEMA_BASE_OBJECT) {
429 return LDB_SUCCESS;
430 }
431
432 /* Generate new value for msDs-IntId
433 * Value should be in 0x80000000..0xBFFFFFFF range */
434 msds_intid = generate_random() % 0X3FFFFFFF;
435 msds_intid += 0x80000000;
436
437 /* probe id values until unique one is found */
438 do {
439 msds_intid++;
440 if (msds_intid > 0xBFFFFFFF) {
441 msds_intid = 0x80000001;
442 }
443
444 ret = dsdb_module_search(ac->module, ac,
445 &ldb_res,
446 schema_dn, LDB_SCOPE_ONELEVEL, NULL,
447 DSDB_FLAG_NEXT_MODULE,
448 ac->req,
449 "(msDS-IntId=%d)", msds_intid);
450 if (ret != LDB_SUCCESS) {
451 ldb_debug_set(ldb, LDB_DEBUG_ERROR,
452 __location__": Searching for msDS-IntId=%d failed - %s\n",
453 msds_intid,
454 ldb_errstring(ldb));
455 return ldb_operr(ldb);
456 }
457 id_exists = (ldb_res->count > 0);
458
459 talloc_free(ldb_res);
460 } while(id_exists);
461
462 return samdb_msg_add_int(ldb, ac->msg, ac->msg, "msDS-IntId",
463 msds_intid);
464 }
465
466
467 /*
468 * samldb_add_entry (async)
469 */
470
471 static int samldb_add_entry_callback(struct ldb_request *req,
472 struct ldb_reply *ares)
473 {
474 struct ldb_context *ldb;
475 struct samldb_ctx *ac;
476 int ret;
477
478 ac = talloc_get_type(req->context, struct samldb_ctx);
479 ldb = ldb_module_get_ctx(ac->module);
480
481 if (!ares) {
482 return ldb_module_done(ac->req, NULL, NULL,
483 LDB_ERR_OPERATIONS_ERROR);
484 }
485
486 if (ares->type == LDB_REPLY_REFERRAL) {
487 return ldb_module_send_referral(ac->req, ares->referral);
488 }
489
490 if (ares->error != LDB_SUCCESS) {
491 return ldb_module_done(ac->req, ares->controls,
492 ares->response, ares->error);
493 }
494 if (ares->type != LDB_REPLY_DONE) {
495 ldb_set_errstring(ldb,
496 "Invalid reply type!\n");
497 return ldb_module_done(ac->req, NULL, NULL,
498 LDB_ERR_OPERATIONS_ERROR);
499 }
500
501 /* The caller may wish to get controls back from the add */
502 ac->ares = talloc_steal(ac, ares);
503
504 ret = samldb_next_step(ac);
505 if (ret != LDB_SUCCESS) {
506 return ldb_module_done(ac->req, NULL, NULL, ret);
507 }
508 return ret;
509 }
510
511 static int samldb_add_entry(struct samldb_ctx *ac)
512 {
513 struct ldb_context *ldb;
514 struct ldb_request *req;
515 int ret;
516
517 ldb = ldb_module_get_ctx(ac->module);
518
519 ret = ldb_build_add_req(&req, ldb, ac,
520 ac->msg,
521 ac->req->controls,
522 ac, samldb_add_entry_callback,
523 ac->req);
524 LDB_REQ_SET_LOCATION(req);
525 if (ret != LDB_SUCCESS) {
526 return ret;
527 }
528
529 return ldb_next_request(ac->module, req);
530 }
531
532 /*
533 * return true if msg carries an attributeSchema that is intended to be RODC
534 * filtered but is also a system-critical attribute.
535 */
536 static bool check_rodc_critical_attribute(struct ldb_message *msg)
537 {
538 uint32_t schemaFlagsEx, searchFlags, rodc_filtered_flags;
539
540 schemaFlagsEx = ldb_msg_find_attr_as_uint(msg, "schemaFlagsEx", 0);
541 searchFlags = ldb_msg_find_attr_as_uint(msg, "searchFlags", 0);
542 rodc_filtered_flags = (SEARCH_FLAG_RODC_ATTRIBUTE
543 | SEARCH_FLAG_CONFIDENTIAL);
544
545 if ((schemaFlagsEx & SCHEMA_FLAG_ATTR_IS_CRITICAL) &&
546 ((searchFlags & rodc_filtered_flags) == rodc_filtered_flags)) {
547 return true;
548 } else {
549 return false;
550 }
551 }
552
553
554 static int samldb_fill_object(struct samldb_ctx *ac)
555 {
556 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
557 int ret;
558
559 /* Add information for the different account types */
560 if (strcmp(ac->type, "user") == 0) {
561 struct ldb_control *rodc_control = ldb_request_get_control(ac->req,
562 LDB_CONTROL_RODC_DCPROMO_OID);
563 if (rodc_control != NULL) {
564 /* see [MS-ADTS] 3.1.1.3.4.1.23 LDAP_SERVER_RODC_DCPROMO_OID */
565 rodc_control->critical = false;
566 ret = samldb_add_step(ac, samldb_rodc_add);
567 if (ret != LDB_SUCCESS) return ret;
568 }
569
570 /* check if we have a valid sAMAccountName */
571 ret = samldb_add_step(ac, samldb_check_sAMAccountName);
572 if (ret != LDB_SUCCESS) return ret;
573
574 ret = samldb_add_step(ac, samldb_add_entry);
575 if (ret != LDB_SUCCESS) return ret;
576
577 } else if (strcmp(ac->type, "group") == 0) {
578 /* check if we have a valid sAMAccountName */
579 ret = samldb_add_step(ac, samldb_check_sAMAccountName);
580 if (ret != LDB_SUCCESS) return ret;
581
582 ret = samldb_add_step(ac, samldb_add_entry);
583 if (ret != LDB_SUCCESS) return ret;
584
585 } else if (strcmp(ac->type, "classSchema") == 0) {
586 const struct ldb_val *rdn_value, *def_obj_cat_val;
587
588 ret = samdb_find_or_add_attribute(ldb, ac->msg,
589 "rdnAttId", "cn");
590 if (ret != LDB_SUCCESS) return ret;
591
592 /* do not allow to mark an attributeSchema as RODC filtered if it
593 * is system-critical */
594 if (check_rodc_critical_attribute(ac->msg)) {
595 ldb_asprintf_errstring(ldb, "Refusing schema add of %s - cannot combine critical class with RODC filtering",
596 ldb_dn_get_linearized(ac->msg->dn));
597 return LDB_ERR_UNWILLING_TO_PERFORM;
598 }
599
600 rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
601 if (rdn_value == NULL) {
602 return ldb_operr(ldb);
603 }
604 if (!ldb_msg_find_element(ac->msg, "lDAPDisplayName")) {
605 /* the RDN has prefix "CN" */
606 ret = ldb_msg_add_string(ac->msg, "lDAPDisplayName",
607 samdb_cn_to_lDAPDisplayName(ac->msg,
608 (const char *) rdn_value->data));
609 if (ret != LDB_SUCCESS) {
610 ldb_oom(ldb);
611 return ret;
612 }
613 }
614
615 if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) {
616 struct GUID guid;
617 /* a new GUID */
618 guid = GUID_random();
619 ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID");
620 if (ret != LDB_SUCCESS) {
621 ldb_oom(ldb);
622 return ret;
623 }
624 }
625
626 def_obj_cat_val = ldb_msg_find_ldb_val(ac->msg,
627 "defaultObjectCategory");
628 if (def_obj_cat_val != NULL) {
629 /* "defaultObjectCategory" has been set by the caller.
630 * Do some checks for consistency.
631 * NOTE: The real constraint check (that
632 * 'defaultObjectCategory' is the DN of the new
633 * objectclass or any parent of it) is still incomplete.
634 * For now we say that 'defaultObjectCategory' is valid
635 * if it exists and it is of objectclass "classSchema".
636 */
637 ac->dn = ldb_dn_from_ldb_val(ac, ldb, def_obj_cat_val);
638 if (ac->dn == NULL) {
639 ldb_set_errstring(ldb,
640 "Invalid DN for 'defaultObjectCategory'!");
641 return LDB_ERR_CONSTRAINT_VIOLATION;
642 }
643 } else {
644 /* "defaultObjectCategory" has not been set by the
645 * caller. Use the entry DN for it. */
646 ac->dn = ac->msg->dn;
647
648 ret = ldb_msg_add_string(ac->msg, "defaultObjectCategory",
649 ldb_dn_alloc_linearized(ac->msg, ac->dn));
650 if (ret != LDB_SUCCESS) {
651 ldb_oom(ldb);
652 return ret;
653 }
654 }
655
656 ret = samldb_add_step(ac, samldb_add_entry);
657 if (ret != LDB_SUCCESS) return ret;
658
659 /* Now perform the checks for the 'defaultObjectCategory'. The
660 * lookup DN was already saved in "ac->dn" */
661 ret = samldb_add_step(ac, samldb_find_for_defaultObjectCategory);
662 if (ret != LDB_SUCCESS) return ret;
663
664 } else if (strcmp(ac->type, "attributeSchema") == 0) {
665 const struct ldb_val *rdn_value;
666 rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
667 if (rdn_value == NULL) {
668 return ldb_operr(ldb);
669 }
670 if (!ldb_msg_find_element(ac->msg, "lDAPDisplayName")) {
671 /* the RDN has prefix "CN" */
672 ret = ldb_msg_add_string(ac->msg, "lDAPDisplayName",
673 samdb_cn_to_lDAPDisplayName(ac->msg,
674 (const char *) rdn_value->data));
675 if (ret != LDB_SUCCESS) {
676 ldb_oom(ldb);
677 return ret;
678 }
679 }
680
681 /* do not allow to mark an attributeSchema as RODC filtered if it
682 * is system-critical */
683 if (check_rodc_critical_attribute(ac->msg)) {
684 ldb_asprintf_errstring(ldb,
685 "samldb: refusing schema add of %s - cannot combine critical attribute with RODC filtering",
686 ldb_dn_get_linearized(ac->msg->dn));
687 return LDB_ERR_UNWILLING_TO_PERFORM;
688 }
689
690 ret = samdb_find_or_add_attribute(ldb, ac->msg,
691 "isSingleValued", "FALSE");
692 if (ret != LDB_SUCCESS) return ret;
693
694 if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) {
695 struct GUID guid;
696 /* a new GUID */
697 guid = GUID_random();
698 ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID");
699 if (ret != LDB_SUCCESS) {
700 ldb_oom(ldb);
701 return ret;
702 }
703 }
704
705 /* handle msDS-IntID attribute */
706 ret = samldb_add_handle_msDS_IntId(ac);
707 if (ret != LDB_SUCCESS) return ret;
708
709 ret = samldb_add_step(ac, samldb_add_entry);
710 if (ret != LDB_SUCCESS) return ret;
711
712 } else {
713 ldb_asprintf_errstring(ldb,
714 "Invalid entry type!");
715 return LDB_ERR_OPERATIONS_ERROR;
716 }
717
718 return samldb_first_step(ac);
719 }
720
721 static int samldb_fill_foreignSecurityPrincipal_object(struct samldb_ctx *ac)
722 {
723 struct ldb_context *ldb;
724 const struct ldb_val *rdn_value;
725 struct dom_sid *sid;
726 int ret;
727
728 ldb = ldb_module_get_ctx(ac->module);
729
730 sid = samdb_result_dom_sid(ac->msg, ac->msg, "objectSid");
731 if (sid == NULL) {
732 rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
733 if (rdn_value == NULL) {
734 return ldb_operr(ldb);
735 }
736 sid = dom_sid_parse_talloc(ac->msg,
737 (const char *)rdn_value->data);
738 if (sid == NULL) {
739 ldb_set_errstring(ldb,
740 "samldb: No valid SID found in ForeignSecurityPrincipal CN!");
741 return LDB_ERR_CONSTRAINT_VIOLATION;
742 }
743 if (! samldb_msg_add_sid(ac->msg, "objectSid", sid)) {
744 return ldb_operr(ldb);
745 }
746 }
747
748 /* finally proceed with adding the entry */
749 ret = samldb_add_step(ac, samldb_add_entry);
750 if (ret != LDB_SUCCESS) return ret;
751
752 return samldb_first_step(ac);
753 }
754
755 static int samldb_schema_info_update(struct samldb_ctx *ac)
756 {
757 int ret;
758 struct ldb_context *ldb;
759 struct dsdb_schema *schema;
760
761 /* replicated update should always go through */
762 if (ldb_request_get_control(ac->req,
763 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
764 return LDB_SUCCESS;
765 }
766
767 /* do not update schemaInfo during provisioning */
768 if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
769 return LDB_SUCCESS;
770 }
771
772 ldb = ldb_module_get_ctx(ac->module);
773 schema = dsdb_get_schema(ldb, NULL);
774 if (!schema) {
775 ldb_debug_set(ldb, LDB_DEBUG_FATAL,
776 "samldb_schema_info_update: no dsdb_schema loaded");
777 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
778 return ldb_operr(ldb);
779 }
780
781 ret = dsdb_module_schema_info_update(ac->module, schema,
782 DSDB_FLAG_NEXT_MODULE, ac->req);
783 if (ret != LDB_SUCCESS) {
784 ldb_asprintf_errstring(ldb,
785 "samldb_schema_info_update: dsdb_module_schema_info_update failed with %s",
786 ldb_errstring(ldb));
787 return ret;
788 }
789
790 return LDB_SUCCESS;
791 }
792
793 /*
794 * "Objectclass" trigger (MS-SAMR 3.1.1.8.1)
795 *
796 * Has to be invoked on "add" and "modify" operations on "user", "computer" and
797 * "group" objects.
798 * ac->msg contains the "add"/"modify" message
799 * ac->type contains the object type (main objectclass)
800 */
801 static int samldb_objectclass_trigger(struct samldb_ctx *ac)
802 {
803 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
804 struct loadparm_context *lp_ctx = talloc_get_type(ldb_get_opaque(ldb,
805 "loadparm"), struct loadparm_context);
806 struct ldb_message_element *el, *el2;
807 enum sid_generator sid_generator;
808 struct dom_sid *sid;
809 int ret;
810
811 /* make sure that "sAMAccountType" is not specified */
812 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
813 if (el != NULL) {
814 ldb_set_errstring(ldb,
815 "samldb: sAMAccountType must not be specified!");
816 return LDB_ERR_UNWILLING_TO_PERFORM;
817 }
818
819 /* Step 1: objectSid assignment */
820
821 /* Don't allow the objectSid to be changed. But beside the RELAX
822 * control we have also to guarantee that it can always be set with
823 * SYSTEM permissions. This is needed for the "samba3sam" backend. */
824 sid = samdb_result_dom_sid(ac, ac->msg, "objectSid");
825 if ((sid != NULL) && (!dsdb_module_am_system(ac->module)) &&
826 (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) == NULL)) {
827 ldb_set_errstring(ldb,
828 "samldb: objectSid must not be specified!");
829 return LDB_ERR_UNWILLING_TO_PERFORM;
830 }
831
832 /* but generate a new SID when we do have an add operations */
833 if ((sid == NULL) && (ac->req->operation == LDB_ADD)) {
834 sid_generator = lpcfg_sid_generator(lp_ctx);
835 if (sid_generator == SID_GENERATOR_INTERNAL) {
836 ret = samldb_add_step(ac, samldb_allocate_sid);
837 if (ret != LDB_SUCCESS) return ret;
838 }
839 }
840
841 if (strcmp(ac->type, "user") == 0) {
842 bool uac_generated = false;
843
844 /* Step 1.2: Default values */
845 ret = samdb_find_or_add_attribute(ldb, ac->msg,
846 "accountExpires", "9223372036854775807");
847 if (ret != LDB_SUCCESS) return ret;
848 ret = samdb_find_or_add_attribute(ldb, ac->msg,
849 "badPasswordTime", "0");
850 if (ret != LDB_SUCCESS) return ret;
851 ret = samdb_find_or_add_attribute(ldb, ac->msg,
852 "badPwdCount", "0");
853 if (ret != LDB_SUCCESS) return ret;
854 ret = samdb_find_or_add_attribute(ldb, ac->msg,
855 "codePage", "0");
856 if (ret != LDB_SUCCESS) return ret;
857 ret = samdb_find_or_add_attribute(ldb, ac->msg,
858 "countryCode", "0");
859 if (ret != LDB_SUCCESS) return ret;
860 ret = samdb_find_or_add_attribute(ldb, ac->msg,
861 "lastLogoff", "0");
862 if (ret != LDB_SUCCESS) return ret;
863 ret = samdb_find_or_add_attribute(ldb, ac->msg,
864 "lastLogon", "0");
865 if (ret != LDB_SUCCESS) return ret;
866 ret = samdb_find_or_add_attribute(ldb, ac->msg,
867 "logonCount", "0");
868 if (ret != LDB_SUCCESS) return ret;
869 ret = samdb_find_or_add_attribute(ldb, ac->msg,
870 "pwdLastSet", "0");
871 if (ret != LDB_SUCCESS) return ret;
872
873 /* On add operations we might need to generate a
874 * "userAccountControl" (if it isn't specified). */
875 el = ldb_msg_find_element(ac->msg, "userAccountControl");
876 if ((el == NULL) && (ac->req->operation == LDB_ADD)) {
877 ret = samdb_msg_set_uint(ldb, ac->msg, ac->msg,
878 "userAccountControl",
879 UF_NORMAL_ACCOUNT);
880 if (ret != LDB_SUCCESS) {
881 return ret;
882 }
883 uac_generated = true;
884 }
885
886 el = ldb_msg_find_element(ac->msg, "userAccountControl");
887 if (el != NULL) {
888 uint32_t user_account_control, account_type;
889
890 /* Step 1.3: "userAccountControl" -> "sAMAccountType" mapping */
891 user_account_control = ldb_msg_find_attr_as_uint(ac->msg,
892 "userAccountControl",
893 0);
894
895 /* Temporary duplicate accounts aren't allowed */
896 if ((user_account_control & UF_TEMP_DUPLICATE_ACCOUNT) != 0) {
897 return LDB_ERR_OTHER;
898 }
899
900 account_type = ds_uf2atype(user_account_control);
901 if (account_type == 0) {
902 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
903 return LDB_ERR_UNWILLING_TO_PERFORM;
904 }
905 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
906 "sAMAccountType",
907 account_type);
908 if (ret != LDB_SUCCESS) {
909 return ret;
910 }
911 el2 = ldb_msg_find_element(ac->msg, "sAMAccountType");
912 el2->flags = LDB_FLAG_MOD_REPLACE;
913
914 /* "isCriticalSystemObject" might be set */
915 if (user_account_control &
916 (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
917 ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
918 "TRUE");
919 if (ret != LDB_SUCCESS) {
920 return ret;
921 }
922 el2 = ldb_msg_find_element(ac->msg,
923 "isCriticalSystemObject");
924 el2->flags = LDB_FLAG_MOD_REPLACE;
925 } else if (user_account_control & UF_WORKSTATION_TRUST_ACCOUNT) {
926 ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
927 "FALSE");
928 if (ret != LDB_SUCCESS) {
929 return ret;
930 }
931 el2 = ldb_msg_find_element(ac->msg,
932 "isCriticalSystemObject");
933 el2->flags = LDB_FLAG_MOD_REPLACE;
934 }
935
936 /* Step 1.4: "userAccountControl" -> "primaryGroupID" mapping */
937 if (!ldb_msg_find_element(ac->msg, "primaryGroupID")) {
938 uint32_t rid = ds_uf2prim_group_rid(user_account_control);
939 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
940 "primaryGroupID", rid);
941 if (ret != LDB_SUCCESS) {
942 return ret;
943 }
944 el2 = ldb_msg_find_element(ac->msg,
945 "primaryGroupID");
946 el2->flags = LDB_FLAG_MOD_REPLACE;
947 }
948
949 /* Step 1.5: Add additional flags when needed */
950 /* Obviously this is done when the "userAccountControl"
951 * has been generated here (tested against Windows
952 * Server) */
953 if (uac_generated) {
954 user_account_control |= UF_ACCOUNTDISABLE;
955 user_account_control |= UF_PASSWD_NOTREQD;
956
957 ret = samdb_msg_set_uint(ldb, ac->msg, ac->msg,
958 "userAccountControl",
959 user_account_control);
960 if (ret != LDB_SUCCESS) {
961 return ret;
962 }
963 }
964 }
965
966 } else if (strcmp(ac->type, "group") == 0) {
967 const char *tempstr;
968
969 /* Step 2.2: Default values */
970 tempstr = talloc_asprintf(ac->msg, "%d",
971 GTYPE_SECURITY_GLOBAL_GROUP);
972 if (tempstr == NULL) return ldb_operr(ldb);
973 ret = samdb_find_or_add_attribute(ldb, ac->msg,
974 "groupType", tempstr);
975 if (ret != LDB_SUCCESS) return ret;
976
977 /* Step 2.3: "groupType" -> "sAMAccountType" */
978 el = ldb_msg_find_element(ac->msg, "groupType");
979 if (el != NULL) {
980 uint32_t group_type, account_type;
981
982 group_type = ldb_msg_find_attr_as_uint(ac->msg,
983 "groupType", 0);
984
985 /* The creation of builtin groups requires the
986 * RELAX control */
987 if (group_type == GTYPE_SECURITY_BUILTIN_LOCAL_GROUP) {
988 if (ldb_request_get_control(ac->req,
989 LDB_CONTROL_RELAX_OID) == NULL) {
990 return LDB_ERR_UNWILLING_TO_PERFORM;
991 }
992 }
993
994 account_type = ds_gtype2atype(group_type);
995 if (account_type == 0) {
996 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
997 return LDB_ERR_UNWILLING_TO_PERFORM;
998 }
999 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1000 "sAMAccountType",
1001 account_type);
1002 if (ret != LDB_SUCCESS) {
1003 return ret;
1004 }
1005 el2 = ldb_msg_find_element(ac->msg, "sAMAccountType");
1006 el2->flags = LDB_FLAG_MOD_REPLACE;
1007 }
1008 }
1009
1010 return LDB_SUCCESS;
1011 }
1012
1013 /*
1014 * "Primary group ID" trigger (MS-SAMR 3.1.1.8.2)
1015 *
1016 * Has to be invoked on "add" and "modify" operations on "user" and "computer"
1017 * objects.
1018 * ac->msg contains the "add"/"modify" message
1019 */
1020
1021 static int samldb_prim_group_set(struct samldb_ctx *ac)
1022 {
1023 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1024 uint32_t rid;
1025 struct dom_sid *sid;
1026 struct ldb_result *res;
1027 int ret;
1028 const char *noattrs[] = { NULL };
1029
1030 rid = ldb_msg_find_attr_as_uint(ac->msg, "primaryGroupID", (uint32_t) -1);
1031 if (rid == (uint32_t) -1) {
1032 /* we aren't affected of any primary group set */
1033 return LDB_SUCCESS;
1034
1035 } else if (!ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
1036 ldb_set_errstring(ldb,
1037 "The primary group isn't settable on add operations!");
1038 return LDB_ERR_UNWILLING_TO_PERFORM;
1039 }
1040
1041 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
1042 if (sid == NULL) {
1043 return ldb_operr(ldb);
1044 }
1045
1046 ret = dsdb_module_search(ac->module, ac, &res, NULL, LDB_SCOPE_SUBTREE,
1047 noattrs, DSDB_FLAG_NEXT_MODULE,
1048 ac->req,
1049 "(objectSid=%s)",
1050 ldap_encode_ndr_dom_sid(ac, sid));
1051 if (ret != LDB_SUCCESS) {
1052 return ret;
1053 }
1054 if (res->count != 1) {
1055 talloc_free(res);
1056 ldb_asprintf_errstring(ldb,
1057 "Failed to find primary group with RID %u!",
1058 rid);
1059 return LDB_ERR_UNWILLING_TO_PERFORM;
1060 }
1061 talloc_free(res);
1062
1063 return LDB_SUCCESS;
1064 }
1065
1066 static int samldb_prim_group_change(struct samldb_ctx *ac)
1067 {
1068 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1069 const char * attrs[] = { "primaryGroupID", "memberOf", NULL };
1070 struct ldb_result *res, *group_res;
1071 struct ldb_message_element *el;
1072 struct ldb_message *msg;
1073 uint32_t prev_rid, new_rid;
1074 struct dom_sid *prev_sid, *new_sid;
1075 struct ldb_dn *prev_prim_group_dn, *new_prim_group_dn;
1076 int ret;
1077 const char *noattrs[] = { NULL };
1078
1079 el = dsdb_get_single_valued_attr(ac->msg, "primaryGroupID",
1080 ac->req->operation);
1081 if (el == NULL) {
1082 /* we are not affected */
1083 return LDB_SUCCESS;
1084 }
1085
1086 /* Fetch information from the existing object */
1087
1088 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1089 DSDB_FLAG_NEXT_MODULE, ac->req, NULL);
1090 if (ret != LDB_SUCCESS) {
1091 return ret;
1092 }
1093 if (res->count != 1) {
1094 return ldb_operr(ldb);
1095 }
1096
1097 /* Finds out the DN of the old primary group */
1098
1099 prev_rid = ldb_msg_find_attr_as_uint(res->msgs[0], "primaryGroupID",
1100 (uint32_t) -1);
1101 if (prev_rid == (uint32_t) -1) {
1102 /* User objects do always have a mandatory "primaryGroupID"
1103 * attribute. If this doesn't exist then the object is of the
1104 * wrong type. This is the exact Windows error code */
1105 return LDB_ERR_OBJECT_CLASS_VIOLATION;
1106 }
1107
1108 prev_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), prev_rid);
1109 if (prev_sid == NULL) {
1110 return ldb_operr(ldb);
1111 }
1112
1113 /* Finds out the DN of the new primary group
1114 * Notice: in order to parse the primary group ID correctly we create
1115 * a temporary message here. */
1116
1117 msg = ldb_msg_new(ac->msg);
1118 if (msg == NULL) {
1119 return ldb_module_oom(ac->module);
1120 }
1121 ret = ldb_msg_add(msg, el, 0);
1122 if (ret != LDB_SUCCESS) {
1123 return ret;
1124 }
1125 new_rid = ldb_msg_find_attr_as_uint(msg, "primaryGroupID", (uint32_t) -1);
1126 talloc_free(msg);
1127 if (new_rid == (uint32_t) -1) {
1128 /* we aren't affected of any primary group change */
1129 return LDB_SUCCESS;
1130 }
1131
1132 if (prev_rid == new_rid) {
1133 return LDB_SUCCESS;
1134 }
1135
1136 ret = dsdb_module_search(ac->module, ac, &group_res, NULL, LDB_SCOPE_SUBTREE,
1137 noattrs, DSDB_FLAG_NEXT_MODULE,
1138 ac->req,
1139 "(objectSid=%s)",
1140 ldap_encode_ndr_dom_sid(ac, prev_sid));
1141 if (ret != LDB_SUCCESS) {
1142 return ret;
1143 }
1144 if (group_res->count != 1) {
1145 return ldb_operr(ldb);
1146 }
1147 prev_prim_group_dn = group_res->msgs[0]->dn;
1148
1149 new_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), new_rid);
1150 if (new_sid == NULL) {
1151 return ldb_operr(ldb);
1152 }
1153
1154 ret = dsdb_module_search(ac->module, ac, &group_res, NULL, LDB_SCOPE_SUBTREE,
1155 noattrs, DSDB_FLAG_NEXT_MODULE,
1156 ac->req,
1157 "(objectSid=%s)",
1158 ldap_encode_ndr_dom_sid(ac, new_sid));
1159 if (ret != LDB_SUCCESS) {
1160 return ret;
1161 }
1162 if (group_res->count != 1) {
1163 /* Here we know if the specified new primary group candidate is
1164 * valid or not. */
1165 return LDB_ERR_UNWILLING_TO_PERFORM;
1166 }
1167 new_prim_group_dn = group_res->msgs[0]->dn;
1168
1169 /* We need to be already a normal member of the new primary
1170 * group in order to be successful. */
1171 el = samdb_find_attribute(ldb, res->msgs[0], "memberOf",
1172 ldb_dn_get_linearized(new_prim_group_dn));
1173 if (el == NULL) {
1174 return LDB_ERR_UNWILLING_TO_PERFORM;
1175 }
1176
1177 /* Remove the "member" attribute on the new primary group */
1178 msg = ldb_msg_new(ac->msg);
1179 if (msg == NULL) {
1180 return ldb_module_oom(ac->module);
1181 }
1182 msg->dn = new_prim_group_dn;
1183
1184 ret = samdb_msg_add_delval(ldb, msg, msg, "member",
1185 ldb_dn_get_linearized(ac->msg->dn));
1186 if (ret != LDB_SUCCESS) {
1187 return ret;
1188 }
1189
1190 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
1191 if (ret != LDB_SUCCESS) {
1192 return ret;
1193 }
1194 talloc_free(msg);
1195
1196 /* Add a "member" attribute for the previous primary group */
1197 msg = ldb_msg_new(ac->msg);
1198 if (msg == NULL) {
1199 return ldb_module_oom(ac->module);
1200 }
1201 msg->dn = prev_prim_group_dn;
1202
1203 ret = samdb_msg_add_addval(ldb, msg, msg, "member",
1204 ldb_dn_get_linearized(ac->msg->dn));
1205 if (ret != LDB_SUCCESS) {
1206 return ret;
1207 }
1208
1209 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
1210 if (ret != LDB_SUCCESS) {
1211 return ret;
1212 }
1213 talloc_free(msg);
1214
1215 return LDB_SUCCESS;
1216 }
1217
1218 static int samldb_prim_group_trigger(struct samldb_ctx *ac)
1219 {
1220 int ret;
1221
1222 if (ac->req->operation == LDB_ADD) {
1223 ret = samldb_prim_group_set(ac);
1224 } else {
1225 ret = samldb_prim_group_change(ac);
1226 }
1227
1228 return ret;
1229 }
1230
1231
1232 /**
1233 * This function is called on LDB modify operations. It performs some additions/
1234 * replaces on the current LDB message when "userAccountControl" changes.
1235 */
1236 static int samldb_user_account_control_change(struct samldb_ctx *ac)
1237 {
1238 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1239 uint32_t user_account_control, old_user_account_control, account_type;
1240 struct ldb_message_element *el;
1241 struct ldb_message *tmp_msg;
1242 int ret;
1243 struct ldb_result *res;
1244 const char *attrs[] = { "userAccountControl", NULL };
1245
1246 el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl",
1247 ac->req->operation);
1248 if (el == NULL) {
1249 /* we are not affected */
1250 return LDB_SUCCESS;
1251 }
1252
1253 /* Create a temporary message for fetching the "userAccountControl" */
1254 tmp_msg = ldb_msg_new(ac->msg);
1255 if (tmp_msg == NULL) {
1256 return ldb_module_oom(ac->module);
1257 }
1258 ret = ldb_msg_add(tmp_msg, el, 0);
1259 if (ret != LDB_SUCCESS) {
1260 return ret;
1261 }
1262 user_account_control = ldb_msg_find_attr_as_uint(tmp_msg,
1263 "userAccountControl",
1264 0);
1265 talloc_free(tmp_msg);
1266
1267 /* Temporary duplicate accounts aren't allowed */
1268 if ((user_account_control & UF_TEMP_DUPLICATE_ACCOUNT) != 0) {
1269 return LDB_ERR_OTHER;
1270 }
1271
1272 /* Fetch the old "userAccountControl" */
1273 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
1274 DSDB_FLAG_NEXT_MODULE, ac->req);
1275 if (ret != LDB_SUCCESS) {
1276 return ret;
1277 }
1278 old_user_account_control = ldb_msg_find_attr_as_uint(res->msgs[0], "userAccountControl", 0);
1279 if (old_user_account_control == 0) {
1280 return ldb_operr(ldb);
1281 }
1282
1283 /*
1284 * The functions "ds_uf2atype" and "ds_uf2prim_group_rid" are used as
1285 * detectors for account type changes.
1286 * So if the account type does change then we need to adjust the
1287 * "sAMAccountType", the "isCriticalSystemObject" and the
1288 * "primaryGroupID" attribute.
1289 */
1290 if ((ds_uf2atype(user_account_control)
1291 == ds_uf2atype(old_user_account_control)) &&
1292 (ds_uf2prim_group_rid(user_account_control)
1293 == ds_uf2prim_group_rid(old_user_account_control))) {
1294 return LDB_SUCCESS;
1295 }
1296
1297 account_type = ds_uf2atype(user_account_control);
1298 if (account_type == 0) {
1299 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
1300 return LDB_ERR_UNWILLING_TO_PERFORM;
1301 }
1302 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType",
1303 account_type);
1304 if (ret != LDB_SUCCESS) {
1305 return ret;
1306 }
1307 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
1308 el->flags = LDB_FLAG_MOD_REPLACE;
1309
1310 /* "isCriticalSystemObject" might be set/changed */
1311 if (user_account_control
1312 & (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
1313 ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
1314 "TRUE");
1315 if (ret != LDB_SUCCESS) {
1316 return ret;
1317 }
1318 el = ldb_msg_find_element(ac->msg,
1319 "isCriticalSystemObject");
1320 el->flags = LDB_FLAG_MOD_REPLACE;
1321 } else if (user_account_control & UF_WORKSTATION_TRUST_ACCOUNT) {
1322 ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
1323 "FALSE");
1324 if (ret != LDB_SUCCESS) {
1325 return ret;
1326 }
1327 el = ldb_msg_find_element(ac->msg,
1328 "isCriticalSystemObject");
1329 el->flags = LDB_FLAG_MOD_REPLACE;
1330 }
1331
1332 if (!ldb_msg_find_element(ac->msg, "primaryGroupID")) {
1333 uint32_t rid = ds_uf2prim_group_rid(user_account_control);
1334 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1335 "primaryGroupID", rid);
1336 if (ret != LDB_SUCCESS) {
1337 return ret;
1338 }
1339 el = ldb_msg_find_element(ac->msg,
1340 "primaryGroupID");
1341 el->flags = LDB_FLAG_MOD_REPLACE;
1342 }
1343
1344 return LDB_SUCCESS;
1345 }
1346
1347 static int samldb_group_type_change(struct samldb_ctx *ac)
1348 {
1349 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1350 uint32_t group_type, old_group_type, account_type;
1351 struct ldb_message_element *el;
1352 struct ldb_message *tmp_msg;
1353 int ret;
1354 struct ldb_result *res;
1355 const char *attrs[] = { "groupType", NULL };
1356
1357 el = dsdb_get_single_valued_attr(ac->msg, "groupType",
1358 ac->req->operation);
1359 if (el == NULL) {
1360 /* we are not affected */
1361 return LDB_SUCCESS;
1362 }
1363
1364 /* Create a temporary message for fetching the "groupType" */
1365 tmp_msg = ldb_msg_new(ac->msg);
1366 if (tmp_msg == NULL) {
1367 return ldb_module_oom(ac->module);
1368 }
1369 ret = ldb_msg_add(tmp_msg, el, 0);
1370 if (ret != LDB_SUCCESS) {
1371 return ret;
1372 }
1373 group_type = ldb_msg_find_attr_as_uint(tmp_msg, "groupType", 0);
1374 talloc_free(tmp_msg);
1375
1376 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
1377 DSDB_FLAG_NEXT_MODULE, ac->req);
1378 if (ret != LDB_SUCCESS) {
1379 return ret;
1380 }
1381 old_group_type = ldb_msg_find_attr_as_uint(res->msgs[0], "groupType", 0);
1382 if (old_group_type == 0) {
1383 return ldb_operr(ldb);
1384 }
1385
1386 /* Group type switching isn't so easy as it seems: We can only
1387 * change in this directions: global <-> universal <-> local
1388 * On each step also the group type itself
1389 * (security/distribution) is variable. */
1390
1391 if (ldb_request_get_control(ac->req, LDB_CONTROL_PROVISION_OID) == NULL) {
1392 switch (group_type) {
1393 case GTYPE_SECURITY_GLOBAL_GROUP:
1394 case GTYPE_DISTRIBUTION_GLOBAL_GROUP:
1395 /* change to "universal" allowed */
1396 if ((old_group_type == GTYPE_SECURITY_DOMAIN_LOCAL_GROUP) ||
1397 (old_group_type == GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP)) {
1398 ldb_set_errstring(ldb,
1399 "samldb: Change from security/distribution local group forbidden!");
1400 return LDB_ERR_UNWILLING_TO_PERFORM;
1401 }
1402 break;
1403
1404 case GTYPE_SECURITY_UNIVERSAL_GROUP:
1405 case GTYPE_DISTRIBUTION_UNIVERSAL_GROUP:
1406 /* each change allowed */
1407 break;
1408 case GTYPE_SECURITY_DOMAIN_LOCAL_GROUP:
1409 case GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP:
1410 /* change to "universal" allowed */
1411 if ((old_group_type == GTYPE_SECURITY_GLOBAL_GROUP) ||
1412 (old_group_type == GTYPE_DISTRIBUTION_GLOBAL_GROUP)) {
1413 ldb_set_errstring(ldb,
1414 "samldb: Change from security/distribution global group forbidden!");
1415 return LDB_ERR_UNWILLING_TO_PERFORM;
1416 }
1417 break;
1418
1419 case GTYPE_SECURITY_BUILTIN_LOCAL_GROUP:
1420 default:
1421 /* we don't allow this "groupType" values */
1422 return LDB_ERR_UNWILLING_TO_PERFORM;
1423 break;
1424 }
1425 }
1426
1427 account_type = ds_gtype2atype(group_type);
1428 if (account_type == 0) {
1429 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
1430 return LDB_ERR_UNWILLING_TO_PERFORM;
1431 }
1432 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType",
1433 account_type);
1434 if (ret != LDB_SUCCESS) {
1435 return ret;
1436 }
1437 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
1438 el->flags = LDB_FLAG_MOD_REPLACE;
1439
1440 return LDB_SUCCESS;
1441 }
1442
1443 static int samldb_sam_accountname_check(struct samldb_ctx *ac)
1444 {
1445 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1446 const char *no_attrs[] = { NULL };
1447 struct ldb_result *res;
1448 const char *sam_accountname, *enc_str;
1449 struct ldb_message_element *el;
1450 struct ldb_message *tmp_msg;
1451 int ret;
1452
1453 el = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
1454 ac->req->operation);
1455 if (el == NULL) {
1456 /* we are not affected */
1457 return LDB_SUCCESS;
1458 }
1459
1460 /* Create a temporary message for fetching the "sAMAccountName" */
1461 tmp_msg = ldb_msg_new(ac->msg);
1462 if (tmp_msg == NULL) {
1463 return ldb_module_oom(ac->module);
1464 }
1465 ret = ldb_msg_add(tmp_msg, el, 0);
1466 if (ret != LDB_SUCCESS) {
1467 return ret;
1468 }
1469 sam_accountname = talloc_steal(ac,
1470 ldb_msg_find_attr_as_string(tmp_msg, "sAMAccountName", NULL));
1471 talloc_free(tmp_msg);
1472
1473 if (sam_accountname == NULL) {
1474 /* The "sAMAccountName" cannot be nothing */
1475 ldb_set_errstring(ldb,
1476 "samldb: Empty account names aren't allowed!");
1477 return LDB_ERR_UNWILLING_TO_PERFORM;
1478 }
1479
1480 enc_str = ldb_binary_encode_string(ac, sam_accountname);
1481 if (enc_str == NULL) {
1482 return ldb_module_oom(ac->module);
1483 }
1484
1485 /* Make sure that a "sAMAccountName" is only used once */
1486
1487 ret = dsdb_module_search(ac->module, ac, &res, NULL, LDB_SCOPE_SUBTREE, no_attrs,
1488 DSDB_FLAG_NEXT_MODULE, ac->req,
1489 "(sAMAccountName=%s)", enc_str);
1490 if (ret != LDB_SUCCESS) {
1491 return ret;
1492 }
1493 if (res->count > 1) {
1494 return ldb_operr(ldb);
1495 } else if (res->count == 1) {
1496 if (ldb_dn_compare(res->msgs[0]->dn, ac->msg->dn) != 0) {
1497 ldb_asprintf_errstring(ldb,
1498 "samldb: Account name (sAMAccountName) '%s' already in use!",
1499 sam_accountname);
1500 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1501 }
1502 }
1503 talloc_free(res);
1504
1505 return LDB_SUCCESS;
1506 }
1507
1508 static int samldb_member_check(struct samldb_ctx *ac)
1509 {
1510 static const char * const attrs[] = { "objectSid", "member", NULL };
1511 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1512 struct ldb_message_element *el;
1513 struct ldb_dn *member_dn;
1514 struct dom_sid *sid;
1515 struct ldb_result *res;
1516 struct dom_sid *group_sid;
1517 unsigned int i, j;
1518 int cnt;
1519 int ret;
1520
1521 /* Fetch information from the existing object */
1522
1523 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1524 DSDB_FLAG_NEXT_MODULE, ac->req, NULL);
1525 if (ret != LDB_SUCCESS) {
1526 return ret;
1527 }
1528 if (res->count != 1) {
1529 return ldb_operr(ldb);
1530 }
1531
1532 group_sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
1533 if (group_sid == NULL) {
1534 return ldb_operr(ldb);
1535 }
1536
1537 /* We've to walk over all modification entries and consider the "member"
1538 * ones. */
1539 for (i = 0; i < ac->msg->num_elements; i++) {
1540 if (ldb_attr_cmp(ac->msg->elements[i].name, "member") != 0) {
1541 continue;
1542 }
1543
1544 el = &ac->msg->elements[i];
1545 for (j = 0; j < el->num_values; j++) {
1546 struct ldb_message_element *mo;
1547 struct ldb_result *group_res;
1548 const char *group_attrs[] = { "primaryGroupID" , NULL };
1549 uint32_t prim_group_rid;
1550
1551 member_dn = ldb_dn_from_ldb_val(ac, ldb,
1552 &el->values[j]);
1553 if (!ldb_dn_validate(member_dn)) {
1554 return ldb_operr(ldb);
1555 }
1556
1557 /* The "member" attribute can be modified with the
1558 * following restrictions (beside a valid DN):
1559 *
1560 * - "add" operations can only be performed when the
1561 * member still doesn't exist - if not then return
1562 * ERR_ENTRY_ALREADY_EXISTS (not
1563 * ERR_ATTRIBUTE_OR_VALUE_EXISTS!)
1564 * - "delete" operations can only be performed when the
1565 * member does exist - if not then return
1566 * ERR_UNWILLING_TO_PERFORM (not
1567 * ERR_NO_SUCH_ATTRIBUTE!)
1568 * - primary group check
1569 */
1570 mo = samdb_find_attribute(ldb, res->msgs[0], "member",
1571 ldb_dn_get_linearized(member_dn));
1572 if (mo == NULL) {
1573 cnt = 0;
1574 } else {
1575 cnt = 1;
1576 }
1577
1578 if ((cnt > 0) && (LDB_FLAG_MOD_TYPE(el->flags)
1579 == LDB_FLAG_MOD_ADD)) {
1580 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1581 }
1582 if ((cnt == 0) && LDB_FLAG_MOD_TYPE(el->flags)
1583 == LDB_FLAG_MOD_DELETE) {
1584 return LDB_ERR_UNWILLING_TO_PERFORM;
1585 }
1586
1587 /* Denies to add "member"s to groups which are primary
1588 * ones for them - in this case return
1589 * ERR_ENTRY_ALREADY_EXISTS. */
1590
1591 ret = dsdb_module_search_dn(ac->module, ac, &group_res,
1592 member_dn, group_attrs,
1593 DSDB_FLAG_NEXT_MODULE, ac->req);
1594 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
1595 /* member DN doesn't exist yet */
1596 continue;
1597 }
1598 if (ret != LDB_SUCCESS) {
1599 return ret;
1600 }
1601 prim_group_rid = ldb_msg_find_attr_as_uint(group_res->msgs[0], "primaryGroupID", (uint32_t)-1);
1602 if (prim_group_rid == (uint32_t) -1) {
1603 /* the member hasn't to be a user account ->
1604 * therefore no check needed in this case. */
1605 continue;
1606 }
1607
1608 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb),
1609 prim_group_rid);
1610 if (sid == NULL) {
1611 return ldb_operr(ldb);
1612 }
1613
1614 if (dom_sid_equal(group_sid, sid)) {
1615 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1616 }
1617 }
1618 }
1619
1620 talloc_free(res);
1621
1622 return LDB_SUCCESS;
1623 }
1624
1625 /* SAM objects have special rules regarding the "description" attribute on
1626 * modify operations. */
1627 static int samldb_description_check(struct samldb_ctx *ac, bool *modified)
1628 {
1629 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1630 const char * const attrs[] = { "objectClass", "description", NULL };
1631 struct ldb_result *res;
1632 unsigned int i;
1633 int ret;
1634
1635 /* Fetch information from the existing object */
1636 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1637 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED, ac->req,
1638 "(|(objectclass=user)(objectclass=group)(objectclass=samDomain)(objectclass=samServer))");
1639 if (ret != LDB_SUCCESS) {
1640 /* don't treat it specially ... let normal error codes
1641 happen from other places */
1642 ldb_reset_err_string(ldb);
1643 return LDB_SUCCESS;
1644 }
1645 if (res->count == 0) {
1646 /* we didn't match the filter */
1647 talloc_free(res);
1648 return LDB_SUCCESS;
1649 }
1650
1651 /* We've to walk over all modification entries and consider the
1652 * "description" ones. */
1653 for (i = 0; i < ac->msg->num_elements; i++) {
1654 if (ldb_attr_cmp(ac->msg->elements[i].name, "description") == 0) {
1655 ac->msg->elements[i].flags |= LDB_FLAG_INTERNAL_FORCE_SINGLE_VALUE_CHECK;
1656 *modified = true;
1657 }
1658 }
1659
1660 talloc_free(res);
1661
1662 return LDB_SUCCESS;
1663 }
1664
1665 /* This trigger adapts the "servicePrincipalName" attributes if the
1666 * "dNSHostName" and/or "sAMAccountName" attribute change(s) */
1667 static int samldb_service_principal_names_change(struct samldb_ctx *ac)
1668 {
1669 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1670 struct ldb_message_element *el = NULL, *el2 = NULL;
1671 struct ldb_message *msg;
1672 const char *attrs[] = { "servicePrincipalName", NULL };
1673 struct ldb_result *res;
1674 const char *dns_hostname = NULL, *old_dns_hostname = NULL,
1675 *sam_accountname = NULL, *old_sam_accountname = NULL;
1676 unsigned int i;
1677 int ret;
1678
1679 el = dsdb_get_single_valued_attr(ac->msg, "dNSHostName",
1680 ac->req->operation);
1681 el2 = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
1682 ac->req->operation);
1683 if ((el == NULL) && (el2 == NULL)) {
1684 /* we are not affected */
1685 return LDB_SUCCESS;
1686 }
1687
1688 /* Create a temporary message for fetching the "dNSHostName" */
1689 if (el != NULL) {
1690 const char *dns_attrs[] = { "dNSHostName", NULL };
1691 msg = ldb_msg_new(ac->msg);
1692 if (msg == NULL) {
1693 return ldb_module_oom(ac->module);
1694 }
1695 ret = ldb_msg_add(msg, el, 0);
1696 if (ret != LDB_SUCCESS) {
1697 return ret;
1698 }
1699 dns_hostname = talloc_steal(ac,
1700 ldb_msg_find_attr_as_string(msg, "dNSHostName", NULL));
1701 talloc_free(msg);
1702
1703 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn,
1704 dns_attrs, DSDB_FLAG_NEXT_MODULE, ac->req);
1705 if (ret == LDB_SUCCESS) {
1706 old_dns_hostname = ldb_msg_find_attr_as_string(res->msgs[0], "dNSHostName", NULL);
1707 }
1708 }
1709
1710 /* Create a temporary message for fetching the "sAMAccountName" */
1711 if (el2 != NULL) {
1712 char *tempstr, *tempstr2;
1713 const char *acct_attrs[] = { "sAMAccountName", NULL };
1714
1715 msg = ldb_msg_new(ac->msg);
1716 if (msg == NULL) {
1717 return ldb_module_oom(ac->module);
1718 }
1719 ret = ldb_msg_add(msg, el2, 0);
1720 if (ret != LDB_SUCCESS) {
1721 return ret;
1722 }
1723 tempstr = talloc_strdup(ac,
1724 ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL));
1725 talloc_free(msg);
1726
1727 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, acct_attrs,
1728 DSDB_FLAG_NEXT_MODULE, ac->req);
1729 if (ret == LDB_SUCCESS) {
1730 tempstr2 = talloc_strdup(ac,
1731 ldb_msg_find_attr_as_string(res->msgs[0],
1732 "sAMAccountName", NULL));
1733 }
1734
1735
1736 /* The "sAMAccountName" needs some additional trimming: we need
1737 * to remove the trailing "$"s if they exist. */
1738 if ((tempstr != NULL) && (tempstr[0] != '\0') &&
1739 (tempstr[strlen(tempstr) - 1] == '$')) {
1740 tempstr[strlen(tempstr) - 1] = '\0';
1741 }
1742 if ((tempstr2 != NULL) && (tempstr2[0] != '\0') &&
1743 (tempstr2[strlen(tempstr2) - 1] == '$')) {
1744 tempstr2[strlen(tempstr2) - 1] = '\0';
1745 }
1746 sam_accountname = tempstr;
1747 old_sam_accountname = tempstr2;
1748 }
1749
1750 if (old_dns_hostname == NULL) {
1751 /* we cannot change when the old name is unknown */
1752 dns_hostname = NULL;
1753 }
1754 if ((old_dns_hostname != NULL) && (dns_hostname != NULL) &&
1755 (strcasecmp(old_dns_hostname, dns_hostname) == 0)) {
1756 /* The "dNSHostName" didn't change */
1757 dns_hostname = NULL;
1758 }
1759
1760 if (old_sam_accountname == NULL) {
1761 /* we cannot change when the old name is unknown */
1762 sam_accountname = NULL;
1763 }
1764 if ((old_sam_accountname != NULL) && (sam_accountname != NULL) &&
1765 (strcasecmp(old_sam_accountname, sam_accountname) == 0)) {
1766 /* The "sAMAccountName" didn't change */
1767 sam_accountname = NULL;
1768 }
1769
1770 if ((dns_hostname == NULL) && (sam_accountname == NULL)) {
1771 /* Well, there are information missing (old name(s)) or the
1772 * names didn't change. We've nothing to do and can exit here */
1773 return LDB_SUCCESS;
1774 }
1775
1776 /* Potential "servicePrincipalName" changes in the same request have to
1777 * be handled before the update (Windows behaviour). */
1778 el = ldb_msg_find_element(ac->msg, "servicePrincipalName");
1779 if (el != NULL) {
1780 msg = ldb_msg_new(ac->msg);
1781 if (msg == NULL) {
1782 return ldb_module_oom(ac->module);
1783 }
1784 msg->dn = ac->msg->dn;
1785
1786 do {
1787 ret = ldb_msg_add(msg, el, el->flags);
1788 if (ret != LDB_SUCCESS) {
1789 return ret;
1790 }
1791
1792 ldb_msg_remove_element(ac->msg, el);
1793
1794 el = ldb_msg_find_element(ac->msg,
1795 "servicePrincipalName");
1796 } while (el != NULL);
1797
1798 ret = dsdb_module_modify(ac->module, msg,
1799 DSDB_FLAG_NEXT_MODULE, ac->req);
1800 if (ret != LDB_SUCCESS) {
1801 return ret;
1802 }
1803 talloc_free(msg);
1804 }
1805
1806 /* Fetch the "servicePrincipalName"s if any */
1807 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1808 DSDB_FLAG_NEXT_MODULE, ac->req, NULL);
1809 if (ret != LDB_SUCCESS) {
1810 return ret;
1811 }
1812 if ((res->count != 1) || (res->msgs[0]->num_elements > 1)) {
1813 return ldb_operr(ldb);
1814 }
1815
1816 if (res->msgs[0]->num_elements == 1) {
1817 /* Yes, we do have "servicePrincipalName"s. First we update them
1818 * locally, that means we do always substitute the current
1819 * "dNSHostName" with the new one and/or "sAMAccountName"
1820 * without "$" with the new one and then we append this to the
1821 * modification request (Windows behaviour). */
1822
1823 for (i = 0; i < res->msgs[0]->elements[0].num_values; i++) {
1824 char *old_str, *new_str, *pos;
1825 const char *tok;
1826
1827 old_str = (char *)
1828 res->msgs[0]->elements[0].values[i].data;
1829
1830 new_str = talloc_strdup(ac->msg,
1831 strtok_r(old_str, "/", &pos));
1832 if (new_str == NULL) {
1833 return ldb_module_oom(ac->module);
1834 }
1835
1836 while ((tok = strtok_r(NULL, "/", &pos)) != NULL) {
1837 if ((dns_hostname != NULL) &&
1838 (strcasecmp(tok, old_dns_hostname) == 0)) {
1839 tok = dns_hostname;
1840 }
1841 if ((sam_accountname != NULL) &&
1842 (strcasecmp(tok, old_sam_accountname) == 0)) {
1843 tok = sam_accountname;
1844 }
1845
1846 new_str = talloc_asprintf(ac->msg, "%s/%s",
1847 new_str, tok);
1848 if (new_str == NULL) {
1849 return ldb_module_oom(ac->module);
1850 }
1851 }
1852
1853 ret = ldb_msg_add_string(ac->msg,
1854 "servicePrincipalName",
1855 new_str);
1856 if (ret != LDB_SUCCESS) {
1857 return ret;
1858 }
1859 }
1860
1861 el = ldb_msg_find_element(ac->msg, "servicePrincipalName");
1862 el->flags = LDB_FLAG_MOD_REPLACE;
1863 }
1864
1865 talloc_free(res);
1866
1867 return LDB_SUCCESS;
1868 }
1869
1870
1871 /* add */
1872 static int samldb_add(struct ldb_module *module, struct ldb_request *req)
1873 {
1874 struct ldb_context *ldb;
1875 struct samldb_ctx *ac;
1876 int ret;
1877
1878 ldb = ldb_module_get_ctx(module);
1879 ldb_debug(ldb, LDB_DEBUG_TRACE, "samldb_add\n");
1880
1881 /* do not manipulate our control entries */
1882 if (ldb_dn_is_special(req->op.add.message->dn)) {
1883 return ldb_next_request(module, req);
1884 }
1885
1886 ac = samldb_ctx_init(module, req);
1887 if (ac == NULL) {
1888 return ldb_operr(ldb);
1889 }
1890
1891 /* build the new msg */
1892 ac->msg = ldb_msg_copy_shallow(ac, req->op.add.message);
1893 if (ac->msg == NULL) {
1894 talloc_free(ac);
1895 ldb_debug(ldb, LDB_DEBUG_FATAL,
1896 "samldb_add: ldb_msg_copy_shallow failed!\n");
1897 return ldb_operr(ldb);
1898 }
1899
1900 if (samdb_find_attribute(ldb, ac->msg,
1901 "objectclass", "user") != NULL) {
1902 ac->type = "user";
1903
1904 ret = samldb_prim_group_trigger(ac);
1905 if (ret != LDB_SUCCESS) {
1906 return ret;
1907 }
1908
1909 ret = samldb_objectclass_trigger(ac);
1910 if (ret != LDB_SUCCESS) {
1911 return ret;
1912 }
1913
1914 return samldb_fill_object(ac);
1915 }
1916
1917 if (samdb_find_attribute(ldb, ac->msg,
1918 "objectclass", "group") != NULL) {
1919 ac->type = "group";
1920
1921 ret = samldb_objectclass_trigger(ac);
1922 if (ret != LDB_SUCCESS) {
1923 return ret;
1924 }
1925
1926 return samldb_fill_object(ac);
1927 }
1928
1929 /* perhaps a foreignSecurityPrincipal? */
1930 if (samdb_find_attribute(ldb, ac->msg,
1931 "objectclass",
1932 "foreignSecurityPrincipal") != NULL) {
1933 return samldb_fill_foreignSecurityPrincipal_object(ac);
1934 }
1935
1936 if (samdb_find_attribute(ldb, ac->msg,
1937 "objectclass", "classSchema") != NULL) {
1938 ret = samldb_schema_info_update(ac);
1939 if (ret != LDB_SUCCESS) {
1940 talloc_free(ac);
1941 return ret;
1942 }
1943
1944 ac->type = "classSchema";
1945 return samldb_fill_object(ac);
1946 }
1947
1948 if (samdb_find_attribute(ldb, ac->msg,
1949 "objectclass", "attributeSchema") != NULL) {
1950 ret = samldb_schema_info_update(ac);
1951 if (ret != LDB_SUCCESS) {
1952 talloc_free(ac);
1953 return ret;
1954 }
1955
1956 ac->type = "attributeSchema";
1957 return samldb_fill_object(ac);
1958 }
1959
1960 talloc_free(ac);
1961
1962 /* nothing matched, go on */
1963 return ldb_next_request(module, req);
1964 }
1965
1966 /* modify */
1967 static int samldb_modify(struct ldb_module *module, struct ldb_request *req)
1968 {
1969 struct ldb_context *ldb;
1970 struct samldb_ctx *ac;
1971 struct ldb_message_element *el, *el2;
1972 bool modified = false;
1973 int ret;
1974
1975 if (ldb_dn_is_special(req->op.mod.message->dn)) {
1976 /* do not manipulate our control entries */
1977 return ldb_next_request(module, req);
1978 }
1979
1980 ldb = ldb_module_get_ctx(module);
1981
1982 /* make sure that "objectSid" is not specified */
1983 el = ldb_msg_find_element(req->op.mod.message, "objectSid");
1984 if (el != NULL) {
1985 ldb_set_errstring(ldb,
1986 "samldb: objectSid must not be specified!");
1987 return LDB_ERR_UNWILLING_TO_PERFORM;
1988 }
1989 /* make sure that "sAMAccountType" is not specified */
1990 el = ldb_msg_find_element(req->op.mod.message, "sAMAccountType");
1991 if (el != NULL) {
1992 ldb_set_errstring(ldb,
1993 "samldb: sAMAccountType must not be specified!");
1994 return LDB_ERR_UNWILLING_TO_PERFORM;
1995 }
1996 /* make sure that "isCriticalSystemObject" is not specified */
1997 el = ldb_msg_find_element(req->op.mod.message, "isCriticalSystemObject");
1998 if (el != NULL) {
1999 if (ldb_request_get_control(req, LDB_CONTROL_RELAX_OID) == NULL) {
2000 ldb_set_errstring(ldb,
2001 "samldb: isCriticalSystemObject must not be specified!");
2002 return LDB_ERR_UNWILLING_TO_PERFORM;
2003 }
2004 }
2005
2006 /* msDS-IntId is not allowed to be modified
2007 * except when modification comes from replication */
2008 if (ldb_msg_find_element(req->op.mod.message, "msDS-IntId")) {
2009 if (!ldb_request_get_control(req,
2010 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
2011 return LDB_ERR_CONSTRAINT_VIOLATION;
2012 }
2013 }
2014
2015 ac = samldb_ctx_init(module, req);
2016 if (ac == NULL) {
2017 return ldb_operr(ldb);
2018 }
2019
2020 /* build the new msg */
2021 ac->msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
2022 if (ac->msg == NULL) {
2023 talloc_free(ac);
2024 ldb_debug(ldb, LDB_DEBUG_FATAL,
2025 "samldb_modify: ldb_msg_copy_shallow failed!\n");
2026 return ldb_operr(ldb);
2027 }
2028
2029 el = ldb_msg_find_element(ac->msg, "primaryGroupID");
2030 if (el != NULL) {
2031 ret = samldb_prim_group_change(ac);
2032 if (ret != LDB_SUCCESS) {
2033 return ret;
2034 }
2035 }
2036
2037 el = ldb_msg_find_element(ac->msg, "userAccountControl");
2038 if (el != NULL) {
2039 modified = true;
2040 ret = samldb_user_account_control_change(ac);
2041 if (ret != LDB_SUCCESS) {
2042 return ret;
2043 }
2044 }
2045
2046 el = ldb_msg_find_element(ac->msg, "groupType");
2047 if (el != NULL) {
2048 modified = true;
2049 ret = samldb_group_type_change(ac);
2050 if (ret != LDB_SUCCESS) {
2051 return ret;
2052 }
2053 }
2054
2055 el = ldb_msg_find_element(ac->msg, "sAMAccountName");
2056 if (el != NULL) {
2057 ret = samldb_sam_accountname_check(ac);
2058 if (ret != LDB_SUCCESS) {
2059 return ret;
2060 }
2061 }
2062
2063 el = ldb_msg_find_element(ac->msg, "member");
2064 if (el != NULL) {
2065 ret = samldb_member_check(ac);
2066 if (ret != LDB_SUCCESS) {
2067 return ret;
2068 }
2069 }
2070
2071 el = ldb_msg_find_element(ac->msg, "description");
2072 if (el != NULL) {
2073 ret = samldb_description_check(ac, &modified);
2074 if (ret != LDB_SUCCESS) {
2075 return ret;
2076 }
2077 }
2078
2079 el = ldb_msg_find_element(ac->msg, "dNSHostName");
2080 el2 = ldb_msg_find_element(ac->msg, "sAMAccountName");
2081 if ((el != NULL) || (el2 != NULL)) {
2082 modified = true;
2083 ret = samldb_service_principal_names_change(ac);
2084 if (ret != LDB_SUCCESS) {
2085 return ret;
2086 }
2087 }
2088
2089 if (modified) {
2090 struct ldb_request *child_req;
2091
2092 /* Now perform the real modifications as a child request */
2093 ret = ldb_build_mod_req(&child_req, ldb, ac,
2094 ac->msg,
2095 req->controls,
2096 req, dsdb_next_callback,
2097 req);
2098 LDB_REQ_SET_LOCATION(child_req);
2099 if (ret != LDB_SUCCESS) {
2100 return ret;
2101 }
2102
2103 return ldb_next_request(module, child_req);
2104 }
2105
2106 talloc_free(ac);
2107
2108 /* no change which interests us, go on */
2109 return ldb_next_request(module, req);
2110 }
2111
2112 /* delete */
2113
2114 static int samldb_prim_group_users_check(struct samldb_ctx *ac)
2115 {
2116 struct ldb_context *ldb;
2117 struct dom_sid *sid;
2118 uint32_t rid;
2119 NTSTATUS status;
2120 int ret;
2121 struct ldb_result *res;
2122 const char *attrs[] = { "objectSid", NULL };
2123 const char *noattrs[] = { NULL };
2124
2125 ldb = ldb_module_get_ctx(ac->module);
2126
2127 /* Finds out the SID/RID of the SAM object */
2128 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->req->op.del.dn, attrs, DSDB_FLAG_NEXT_MODULE, ac->req);
2129 if (ret != LDB_SUCCESS) {
2130 return ret;
2131 }
2132
2133 sid = samdb_result_dom_sid(ac, res->msgs[0], "objectSid");
2134 if (sid == NULL) {
2135 /* No SID - it might not be a SAM object - therefore ok */
2136 return LDB_SUCCESS;
2137 }
2138 status = dom_sid_split_rid(ac, sid, NULL, &rid);
2139 if (!NT_STATUS_IS_OK(status)) {
2140 return ldb_operr(ldb);
2141 }
2142 if (rid == 0) {
2143 /* Special object (security principal?) */
2144 return LDB_SUCCESS;
2145 }
2146
2147 /* Deny delete requests from groups which are primary ones */
2148 ret = dsdb_module_search(ac->module, ac, &res, NULL, LDB_SCOPE_SUBTREE, noattrs,
2149 DSDB_FLAG_NEXT_MODULE,
2150 ac->req,
2151 "(&(primaryGroupID=%u)(objectClass=user))", rid);
2152 if (ret != LDB_SUCCESS) {
2153 return ret;
2154 }
2155 if (res->count > 0) {
2156 return LDB_ERR_ENTRY_ALREADY_EXISTS;
2157 }
2158
2159 return LDB_SUCCESS;
2160 }
2161
2162 static int samldb_delete(struct ldb_module *module, struct ldb_request *req)
2163 {
2164 struct samldb_ctx *ac;
2165 int ret;
2166
2167 if (ldb_dn_is_special(req->op.del.dn)) {
2168 /* do not manipulate our control entries */
2169 return ldb_next_request(module, req);
2170 }
2171
2172 ac = samldb_ctx_init(module, req);
2173 if (ac == NULL) {
2174 return ldb_operr(ldb_module_get_ctx(module));
2175 }
2176
2177 ret = samldb_prim_group_users_check(ac);
2178 if (ret != LDB_SUCCESS) {
2179 return ret;
2180 }
2181
2182 talloc_free(ac);
2183
2184 return ldb_next_request(module, req);
2185 }
2186
2187 /* extended */
2188
2189 static int samldb_extended_allocate_rid_pool(struct ldb_module *module, struct ldb_request *req)
2190 {
2191 struct ldb_context *ldb = ldb_module_get_ctx(module);
2192 struct dsdb_fsmo_extended_op *exop;
2193 int ret;
2194
2195 exop = talloc_get_type(req->op.extended.data,
2196 struct dsdb_fsmo_extended_op);
2197 if (!exop) {
2198 ldb_set_errstring(ldb,
2199 "samldb_extended_allocate_rid_pool: invalid extended data");
2200 return LDB_ERR_PROTOCOL_ERROR;
2201 }
2202
2203 ret = ridalloc_allocate_rid_pool_fsmo(module, exop, req);
2204 if (ret != LDB_SUCCESS) {
2205 return ret;
2206 }
2207
2208 return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
2209 }
2210
2211 static int samldb_extended(struct ldb_module *module, struct ldb_request *req)
2212 {
2213 if (strcmp(req->op.extended.oid, DSDB_EXTENDED_ALLOCATE_RID_POOL) == 0) {
2214 return samldb_extended_allocate_rid_pool(module, req);
2215 }
2216
2217 return ldb_next_request(module, req);
2218 }
2219
2220
2221 static const struct ldb_module_ops ldb_samldb_module_ops = {
2222 .name = "samldb",
2223 .add = samldb_add,
2224 .modify = samldb_modify,
2225 .del = samldb_delete,
2226 .extended = samldb_extended
2227 };
2228
2229
2230 int ldb_samldb_module_init(const char *version)
2231 {
2232 LDB_MODULE_CHECK_VERSION(version);
2233 return ldb_register_module(&ldb_samldb_module_ops);
2234 }
reg import