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Fix some types
[Samba.git] / source4 / dsdb / samdb / ldb_modules / samldb.c
blobd9b4a499185231dcbc845e91129da36df3a21587
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, false)) {
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 if (user_account_control &
915 (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
916 ret = samdb_msg_set_string(ldb, ac->msg, ac->msg,
917 "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 }
926
927 /* Step 1.4: "userAccountControl" -> "primaryGroupID" mapping */
928 if (!ldb_msg_find_element(ac->msg, "primaryGroupID")) {
929 uint32_t rid = ds_uf2prim_group_rid(user_account_control);
930 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
931 "primaryGroupID", rid);
932 if (ret != LDB_SUCCESS) {
933 return ret;
934 }
935 el2 = ldb_msg_find_element(ac->msg,
936 "primaryGroupID");
937 el2->flags = LDB_FLAG_MOD_REPLACE;
938 }
939
940 /* Step 1.5: Add additional flags when needed */
941 /* Obviously this is done when the "userAccountControl"
942 * has been generated here (tested against Windows
943 * Server) */
944 if (uac_generated) {
945 user_account_control |= UF_ACCOUNTDISABLE;
946 user_account_control |= UF_PASSWD_NOTREQD;
947
948 ret = samdb_msg_set_uint(ldb, ac->msg, ac->msg,
949 "userAccountControl",
950 user_account_control);
951 if (ret != LDB_SUCCESS) {
952 return ret;
953 }
954 }
955 }
956
957 } else if (strcmp(ac->type, "group") == 0) {
958 const char *tempstr;
959
960 /* Step 2.2: Default values */
961 tempstr = talloc_asprintf(ac->msg, "%d",
962 GTYPE_SECURITY_GLOBAL_GROUP);
963 if (tempstr == NULL) return ldb_operr(ldb);
964 ret = samdb_find_or_add_attribute(ldb, ac->msg,
965 "groupType", tempstr);
966 if (ret != LDB_SUCCESS) return ret;
967
968 /* Step 2.3: "groupType" -> "sAMAccountType" */
969 el = ldb_msg_find_element(ac->msg, "groupType");
970 if (el != NULL) {
971 uint32_t group_type, account_type;
972
973 group_type = ldb_msg_find_attr_as_uint(ac->msg,
974 "groupType", 0);
975
976 /* The creation of builtin groups requires the
977 * RELAX control */
978 if (group_type == GTYPE_SECURITY_BUILTIN_LOCAL_GROUP) {
979 if (ldb_request_get_control(ac->req,
980 LDB_CONTROL_RELAX_OID) == NULL) {
981 return LDB_ERR_UNWILLING_TO_PERFORM;
982 }
983 }
984
985 account_type = ds_gtype2atype(group_type);
986 if (account_type == 0) {
987 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
988 return LDB_ERR_UNWILLING_TO_PERFORM;
989 }
990 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
991 "sAMAccountType",
992 account_type);
993 if (ret != LDB_SUCCESS) {
994 return ret;
995 }
996 el2 = ldb_msg_find_element(ac->msg, "sAMAccountType");
997 el2->flags = LDB_FLAG_MOD_REPLACE;
998 }
999 }
1000
1001 return LDB_SUCCESS;
1002 }
1003
1004 /*
1005 * "Primary group ID" trigger (MS-SAMR 3.1.1.8.2)
1006 *
1007 * Has to be invoked on "add" and "modify" operations on "user" and "computer"
1008 * objects.
1009 * ac->msg contains the "add"/"modify" message
1010 */
1011
1012 static int samldb_prim_group_set(struct samldb_ctx *ac)
1013 {
1014 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1015 uint32_t rid;
1016 struct dom_sid *sid;
1017 struct ldb_result *res;
1018 int ret;
1019 const char *noattrs[] = { NULL };
1020
1021 rid = ldb_msg_find_attr_as_uint(ac->msg, "primaryGroupID", (uint32_t) -1);
1022 if (rid == (uint32_t) -1) {
1023 /* we aren't affected of any primary group set */
1024 return LDB_SUCCESS;
1025
1026 } else if (!ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
1027 ldb_set_errstring(ldb,
1028 "The primary group isn't settable on add operations!");
1029 return LDB_ERR_UNWILLING_TO_PERFORM;
1030 }
1031
1032 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
1033 if (sid == NULL) {
1034 return ldb_operr(ldb);
1035 }
1036
1037 ret = dsdb_module_search(ac->module, ac, &res, NULL, LDB_SCOPE_SUBTREE,
1038 noattrs, DSDB_FLAG_NEXT_MODULE,
1039 ac->req,
1040 "(objectSid=%s)",
1041 ldap_encode_ndr_dom_sid(ac, sid));
1042 if (ret != LDB_SUCCESS) {
1043 return ret;
1044 }
1045 if (res->count != 1) {
1046 talloc_free(res);
1047 ldb_asprintf_errstring(ldb,
1048 "Failed to find primary group with RID %u!",
1049 rid);
1050 return LDB_ERR_UNWILLING_TO_PERFORM;
1051 }
1052 talloc_free(res);
1053
1054 return LDB_SUCCESS;
1055 }
1056
1057 static int samldb_prim_group_change(struct samldb_ctx *ac)
1058 {
1059 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1060 const char * attrs[] = { "primaryGroupID", "memberOf", NULL };
1061 struct ldb_result *res, *group_res;
1062 struct ldb_message_element *el;
1063 struct ldb_message *msg;
1064 uint32_t prev_rid, new_rid;
1065 struct dom_sid *prev_sid, *new_sid;
1066 struct ldb_dn *prev_prim_group_dn, *new_prim_group_dn;
1067 int ret;
1068 const char *noattrs[] = { NULL };
1069
1070 el = dsdb_get_single_valued_attr(ac->msg, "primaryGroupID",
1071 ac->req->operation);
1072 if (el == NULL) {
1073 /* we are not affected */
1074 return LDB_SUCCESS;
1075 }
1076
1077 /* Fetch information from the existing object */
1078
1079 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1080 DSDB_FLAG_NEXT_MODULE, ac->req, NULL);
1081 if (ret != LDB_SUCCESS) {
1082 return ret;
1083 }
1084 if (res->count != 1) {
1085 return ldb_operr(ldb);
1086 }
1087
1088 /* Finds out the DN of the old primary group */
1089
1090 prev_rid = ldb_msg_find_attr_as_uint(res->msgs[0], "primaryGroupID",
1091 (uint32_t) -1);
1092 if (prev_rid == (uint32_t) -1) {
1093 /* User objects do always have a mandatory "primaryGroupID"
1094 * attribute. If this doesn't exist then the object is of the
1095 * wrong type. This is the exact Windows error code */
1096 return LDB_ERR_OBJECT_CLASS_VIOLATION;
1097 }
1098
1099 prev_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), prev_rid);
1100 if (prev_sid == NULL) {
1101 return ldb_operr(ldb);
1102 }
1103
1104 /* Finds out the DN of the new primary group
1105 * Notice: in order to parse the primary group ID correctly we create
1106 * a temporary message here. */
1107
1108 msg = ldb_msg_new(ac->msg);
1109 if (msg == NULL) {
1110 return ldb_module_oom(ac->module);
1111 }
1112 ret = ldb_msg_add(msg, el, 0);
1113 if (ret != LDB_SUCCESS) {
1114 return ret;
1115 }
1116 new_rid = ldb_msg_find_attr_as_uint(msg, "primaryGroupID", (uint32_t) -1);
1117 talloc_free(msg);
1118 if (new_rid == (uint32_t) -1) {
1119 /* we aren't affected of any primary group change */
1120 return LDB_SUCCESS;
1121 }
1122
1123 if (prev_rid == new_rid) {
1124 return LDB_SUCCESS;
1125 }
1126
1127 ret = dsdb_module_search(ac->module, ac, &group_res, NULL, LDB_SCOPE_SUBTREE,
1128 noattrs, DSDB_FLAG_NEXT_MODULE,
1129 ac->req,
1130 "(objectSid=%s)",
1131 ldap_encode_ndr_dom_sid(ac, prev_sid));
1132 if (ret != LDB_SUCCESS) {
1133 return ret;
1134 }
1135 if (group_res->count != 1) {
1136 return ldb_operr(ldb);
1137 }
1138 prev_prim_group_dn = group_res->msgs[0]->dn;
1139
1140 new_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), new_rid);
1141 if (new_sid == NULL) {
1142 return ldb_operr(ldb);
1143 }
1144
1145 ret = dsdb_module_search(ac->module, ac, &group_res, NULL, LDB_SCOPE_SUBTREE,
1146 noattrs, DSDB_FLAG_NEXT_MODULE,
1147 ac->req,
1148 "(objectSid=%s)",
1149 ldap_encode_ndr_dom_sid(ac, new_sid));
1150 if (ret != LDB_SUCCESS) {
1151 return ret;
1152 }
1153 if (group_res->count != 1) {
1154 /* Here we know if the specified new primary group candidate is
1155 * valid or not. */
1156 return LDB_ERR_UNWILLING_TO_PERFORM;
1157 }
1158 new_prim_group_dn = group_res->msgs[0]->dn;
1159
1160 /* We need to be already a normal member of the new primary
1161 * group in order to be successful. */
1162 el = samdb_find_attribute(ldb, res->msgs[0], "memberOf",
1163 ldb_dn_get_linearized(new_prim_group_dn));
1164 if (el == NULL) {
1165 return LDB_ERR_UNWILLING_TO_PERFORM;
1166 }
1167
1168 /* Remove the "member" attribute on the new primary group */
1169 msg = ldb_msg_new(ac->msg);
1170 if (msg == NULL) {
1171 return ldb_module_oom(ac->module);
1172 }
1173 msg->dn = new_prim_group_dn;
1174
1175 ret = samdb_msg_add_delval(ldb, msg, msg, "member",
1176 ldb_dn_get_linearized(ac->msg->dn));
1177 if (ret != LDB_SUCCESS) {
1178 return ret;
1179 }
1180
1181 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
1182 if (ret != LDB_SUCCESS) {
1183 return ret;
1184 }
1185 talloc_free(msg);
1186
1187 /* Add a "member" attribute for the previous primary group */
1188 msg = ldb_msg_new(ac->msg);
1189 if (msg == NULL) {
1190 return ldb_module_oom(ac->module);
1191 }
1192 msg->dn = prev_prim_group_dn;
1193
1194 ret = samdb_msg_add_addval(ldb, msg, msg, "member",
1195 ldb_dn_get_linearized(ac->msg->dn));
1196 if (ret != LDB_SUCCESS) {
1197 return ret;
1198 }
1199
1200 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
1201 if (ret != LDB_SUCCESS) {
1202 return ret;
1203 }
1204 talloc_free(msg);
1205
1206 return LDB_SUCCESS;
1207 }
1208
1209 static int samldb_prim_group_trigger(struct samldb_ctx *ac)
1210 {
1211 int ret;
1212
1213 if (ac->req->operation == LDB_ADD) {
1214 ret = samldb_prim_group_set(ac);
1215 } else {
1216 ret = samldb_prim_group_change(ac);
1217 }
1218
1219 return ret;
1220 }
1221
1222 static int samldb_user_account_control_change(struct samldb_ctx *ac)
1223 {
1224 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1225 uint32_t user_account_control, account_type;
1226 struct ldb_message_element *el;
1227 struct ldb_message *tmp_msg;
1228 int ret;
1229
1230 el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl",
1231 ac->req->operation);
1232 if (el == NULL) {
1233 /* we are not affected */
1234 return LDB_SUCCESS;
1235 }
1236
1237 /* Create a temporary message for fetching the "userAccountControl" */
1238 tmp_msg = ldb_msg_new(ac->msg);
1239 if (tmp_msg == NULL) {
1240 return ldb_module_oom(ac->module);
1241 }
1242 ret = ldb_msg_add(tmp_msg, el, 0);
1243 if (ret != LDB_SUCCESS) {
1244 return ret;
1245 }
1246 user_account_control = ldb_msg_find_attr_as_uint(tmp_msg,
1247 "userAccountControl",
1248 0);
1249 talloc_free(tmp_msg);
1250
1251 /* Temporary duplicate accounts aren't allowed */
1252 if ((user_account_control & UF_TEMP_DUPLICATE_ACCOUNT) != 0) {
1253 return LDB_ERR_OTHER;
1254 }
1255
1256 account_type = ds_uf2atype(user_account_control);
1257 if (account_type == 0) {
1258 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
1259 return LDB_ERR_UNWILLING_TO_PERFORM;
1260 }
1261 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType",
1262 account_type);
1263 if (ret != LDB_SUCCESS) {
1264 return ret;
1265 }
1266 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
1267 el->flags = LDB_FLAG_MOD_REPLACE;
1268
1269 if (user_account_control
1270 & (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
1271 ret = samdb_msg_add_string(ldb, ac->msg, ac->msg,
1272 "isCriticalSystemObject", "TRUE");
1273 if (ret != LDB_SUCCESS) {
1274 return ret;
1275 }
1276 el = ldb_msg_find_element(ac->msg,
1277 "isCriticalSystemObject");
1278 el->flags = LDB_FLAG_MOD_REPLACE;
1279 }
1280
1281 if (!ldb_msg_find_element(ac->msg, "primaryGroupID")) {
1282 uint32_t rid = ds_uf2prim_group_rid(user_account_control);
1283 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1284 "primaryGroupID", rid);
1285 if (ret != LDB_SUCCESS) {
1286 return ret;
1287 }
1288 el = ldb_msg_find_element(ac->msg,
1289 "primaryGroupID");
1290 el->flags = LDB_FLAG_MOD_REPLACE;
1291 }
1292
1293 return LDB_SUCCESS;
1294 }
1295
1296 static int samldb_group_type_change(struct samldb_ctx *ac)
1297 {
1298 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1299 uint32_t group_type, old_group_type, account_type;
1300 struct ldb_message_element *el;
1301 struct ldb_message *tmp_msg;
1302 int ret;
1303 struct ldb_result *res;
1304 const char *attrs[] = { "groupType", NULL };
1305
1306 el = dsdb_get_single_valued_attr(ac->msg, "groupType",
1307 ac->req->operation);
1308 if (el == NULL) {
1309 /* we are not affected */
1310 return LDB_SUCCESS;
1311 }
1312
1313 /* Create a temporary message for fetching the "groupType" */
1314 tmp_msg = ldb_msg_new(ac->msg);
1315 if (tmp_msg == NULL) {
1316 return ldb_module_oom(ac->module);
1317 }
1318 ret = ldb_msg_add(tmp_msg, el, 0);
1319 if (ret != LDB_SUCCESS) {
1320 return ret;
1321 }
1322 group_type = ldb_msg_find_attr_as_uint(tmp_msg, "groupType", 0);
1323 talloc_free(tmp_msg);
1324
1325 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
1326 DSDB_FLAG_NEXT_MODULE, ac->req);
1327 if (ret != LDB_SUCCESS) {
1328 return ret;
1329 }
1330 old_group_type = ldb_msg_find_attr_as_uint(res->msgs[0], "groupType", 0);
1331 if (old_group_type == 0) {
1332 return ldb_operr(ldb);
1333 }
1334
1335 /* Group type switching isn't so easy as it seems: We can only
1336 * change in this directions: global <-> universal <-> local
1337 * On each step also the group type itself
1338 * (security/distribution) is variable. */
1339
1340 if (ldb_request_get_control(ac->req, LDB_CONTROL_PROVISION_OID) == NULL) {
1341 switch (group_type) {
1342 case GTYPE_SECURITY_GLOBAL_GROUP:
1343 case GTYPE_DISTRIBUTION_GLOBAL_GROUP:
1344 /* change to "universal" allowed */
1345 if ((old_group_type == GTYPE_SECURITY_DOMAIN_LOCAL_GROUP) ||
1346 (old_group_type == GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP)) {
1347 ldb_set_errstring(ldb,
1348 "samldb: Change from security/distribution local group forbidden!");
1349 return LDB_ERR_UNWILLING_TO_PERFORM;
1350 }
1351 break;
1352
1353 case GTYPE_SECURITY_UNIVERSAL_GROUP:
1354 case GTYPE_DISTRIBUTION_UNIVERSAL_GROUP:
1355 /* each change allowed */
1356 break;
1357 case GTYPE_SECURITY_DOMAIN_LOCAL_GROUP:
1358 case GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP:
1359 /* change to "universal" allowed */
1360 if ((old_group_type == GTYPE_SECURITY_GLOBAL_GROUP) ||
1361 (old_group_type == GTYPE_DISTRIBUTION_GLOBAL_GROUP)) {
1362 ldb_set_errstring(ldb,
1363 "samldb: Change from security/distribution global group forbidden!");
1364 return LDB_ERR_UNWILLING_TO_PERFORM;
1365 }
1366 break;
1367
1368 case GTYPE_SECURITY_BUILTIN_LOCAL_GROUP:
1369 default:
1370 /* we don't allow this "groupType" values */
1371 return LDB_ERR_UNWILLING_TO_PERFORM;
1372 break;
1373 }
1374 }
1375
1376 account_type = ds_gtype2atype(group_type);
1377 if (account_type == 0) {
1378 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
1379 return LDB_ERR_UNWILLING_TO_PERFORM;
1380 }
1381 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType",
1382 account_type);
1383 if (ret != LDB_SUCCESS) {
1384 return ret;
1385 }
1386 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
1387 el->flags = LDB_FLAG_MOD_REPLACE;
1388
1389 return LDB_SUCCESS;
1390 }
1391
1392 static int samldb_sam_accountname_check(struct samldb_ctx *ac)
1393 {
1394 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1395 const char *no_attrs[] = { NULL };
1396 struct ldb_result *res;
1397 const char *sam_accountname, *enc_str;
1398 struct ldb_message_element *el;
1399 struct ldb_message *tmp_msg;
1400 int ret;
1401
1402 el = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
1403 ac->req->operation);
1404 if (el == NULL) {
1405 /* we are not affected */
1406 return LDB_SUCCESS;
1407 }
1408
1409 /* Create a temporary message for fetching the "sAMAccountName" */
1410 tmp_msg = ldb_msg_new(ac->msg);
1411 if (tmp_msg == NULL) {
1412 return ldb_module_oom(ac->module);
1413 }
1414 ret = ldb_msg_add(tmp_msg, el, 0);
1415 if (ret != LDB_SUCCESS) {
1416 return ret;
1417 }
1418 sam_accountname = talloc_steal(ac,
1419 ldb_msg_find_attr_as_string(tmp_msg, "sAMAccountName", NULL));
1420 talloc_free(tmp_msg);
1421
1422 if (sam_accountname == NULL) {
1423 /* The "sAMAccountName" cannot be nothing */
1424 ldb_set_errstring(ldb,
1425 "samldb: Empty account names aren't allowed!");
1426 return LDB_ERR_UNWILLING_TO_PERFORM;
1427 }
1428
1429 enc_str = ldb_binary_encode_string(ac, sam_accountname);
1430 if (enc_str == NULL) {
1431 return ldb_module_oom(ac->module);
1432 }
1433
1434 /* Make sure that a "sAMAccountName" is only used once */
1435
1436 ret = dsdb_module_search(ac->module, ac, &res, NULL, LDB_SCOPE_SUBTREE, no_attrs,
1437 DSDB_FLAG_NEXT_MODULE, ac->req,
1438 "(sAMAccountName=%s)", enc_str);
1439 if (ret != LDB_SUCCESS) {
1440 return ret;
1441 }
1442 if (res->count > 1) {
1443 return ldb_operr(ldb);
1444 } else if (res->count == 1) {
1445 if (ldb_dn_compare(res->msgs[0]->dn, ac->msg->dn) != 0) {
1446 ldb_asprintf_errstring(ldb,
1447 "samldb: Account name (sAMAccountName) '%s' already in use!",
1448 sam_accountname);
1449 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1450 }
1451 }
1452 talloc_free(res);
1453
1454 return LDB_SUCCESS;
1455 }
1456
1457 static int samldb_member_check(struct samldb_ctx *ac)
1458 {
1459 static const char * const attrs[] = { "objectSid", "member", NULL };
1460 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1461 struct ldb_message_element *el;
1462 struct ldb_dn *member_dn;
1463 struct dom_sid *sid;
1464 struct ldb_result *res;
1465 struct dom_sid *group_sid;
1466 unsigned int i, j;
1467 int cnt;
1468 int ret;
1469
1470 /* Fetch information from the existing object */
1471
1472 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1473 DSDB_FLAG_NEXT_MODULE, ac->req, NULL);
1474 if (ret != LDB_SUCCESS) {
1475 return ret;
1476 }
1477 if (res->count != 1) {
1478 return ldb_operr(ldb);
1479 }
1480
1481 group_sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
1482 if (group_sid == NULL) {
1483 return ldb_operr(ldb);
1484 }
1485
1486 /* We've to walk over all modification entries and consider the "member"
1487 * ones. */
1488 for (i = 0; i < ac->msg->num_elements; i++) {
1489 if (ldb_attr_cmp(ac->msg->elements[i].name, "member") != 0) {
1490 continue;
1491 }
1492
1493 el = &ac->msg->elements[i];
1494 for (j = 0; j < el->num_values; j++) {
1495 struct ldb_message_element *mo;
1496 struct ldb_result *group_res;
1497 const char *group_attrs[] = { "primaryGroupID" , NULL };
1498 uint32_t prim_group_rid;
1499
1500 member_dn = ldb_dn_from_ldb_val(ac, ldb,
1501 &el->values[j]);
1502 if (!ldb_dn_validate(member_dn)) {
1503 return ldb_operr(ldb);
1504 }
1505
1506 /* The "member" attribute can be modified with the
1507 * following restrictions (beside a valid DN):
1508 *
1509 * - "add" operations can only be performed when the
1510 * member still doesn't exist - if not then return
1511 * ERR_ENTRY_ALREADY_EXISTS (not
1512 * ERR_ATTRIBUTE_OR_VALUE_EXISTS!)
1513 * - "delete" operations can only be performed when the
1514 * member does exist - if not then return
1515 * ERR_UNWILLING_TO_PERFORM (not
1516 * ERR_NO_SUCH_ATTRIBUTE!)
1517 * - primary group check
1518 */
1519 mo = samdb_find_attribute(ldb, res->msgs[0], "member",
1520 ldb_dn_get_linearized(member_dn));
1521 if (mo == NULL) {
1522 cnt = 0;
1523 } else {
1524 cnt = 1;
1525 }
1526
1527 if ((cnt > 0) && (LDB_FLAG_MOD_TYPE(el->flags)
1528 == LDB_FLAG_MOD_ADD)) {
1529 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1530 }
1531 if ((cnt == 0) && LDB_FLAG_MOD_TYPE(el->flags)
1532 == LDB_FLAG_MOD_DELETE) {
1533 return LDB_ERR_UNWILLING_TO_PERFORM;
1534 }
1535
1536 /* Denies to add "member"s to groups which are primary
1537 * ones for them - in this case return
1538 * ERR_ENTRY_ALREADY_EXISTS. */
1539
1540 ret = dsdb_module_search_dn(ac->module, ac, &group_res,
1541 member_dn, group_attrs,
1542 DSDB_FLAG_NEXT_MODULE, ac->req);
1543 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
1544 /* member DN doesn't exist yet */
1545 continue;
1546 }
1547 if (ret != LDB_SUCCESS) {
1548 return ret;
1549 }
1550 prim_group_rid = ldb_msg_find_attr_as_uint(group_res->msgs[0], "primaryGroupID", (uint32_t)-1);
1551 if (prim_group_rid == (uint32_t) -1) {
1552 /* the member hasn't to be a user account ->
1553 * therefore no check needed in this case. */
1554 continue;
1555 }
1556
1557 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb),
1558 prim_group_rid);
1559 if (sid == NULL) {
1560 return ldb_operr(ldb);
1561 }
1562
1563 if (dom_sid_equal(group_sid, sid)) {
1564 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1565 }
1566 }
1567 }
1568
1569 talloc_free(res);
1570
1571 return LDB_SUCCESS;
1572 }
1573
1574 /* SAM objects have special rules regarding the "description" attribute on
1575 * modify operations. */
1576 static int samldb_description_check(struct samldb_ctx *ac, bool *modified)
1577 {
1578 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1579 const char * const attrs[] = { "objectClass", "description", NULL };
1580 struct ldb_result *res;
1581 unsigned int i;
1582 int ret;
1583
1584 /* Fetch information from the existing object */
1585 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1586 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED, ac->req,
1587 "(|(objectclass=user)(objectclass=group)(objectclass=samDomain)(objectclass=samServer))");
1588 if (ret != LDB_SUCCESS) {
1589 /* don't treat it specially ... let normal error codes
1590 happen from other places */
1591 ldb_reset_err_string(ldb);
1592 return LDB_SUCCESS;
1593 }
1594 if (res->count == 0) {
1595 /* we didn't match the filter */
1596 talloc_free(res);
1597 return LDB_SUCCESS;
1598 }
1599
1600 /* We've to walk over all modification entries and consider the
1601 * "description" ones. */
1602 for (i = 0; i < ac->msg->num_elements; i++) {
1603 if (ldb_attr_cmp(ac->msg->elements[i].name, "description") == 0) {
1604 ac->msg->elements[i].flags |= LDB_FLAG_INTERNAL_FORCE_SINGLE_VALUE_CHECK;
1605 *modified = true;
1606 }
1607 }
1608
1609 talloc_free(res);
1610
1611 return LDB_SUCCESS;
1612 }
1613
1614 /* This trigger adapts the "servicePrincipalName" attributes if the
1615 * "dNSHostName" and/or "sAMAccountName" attribute change(s) */
1616 static int samldb_service_principal_names_change(struct samldb_ctx *ac)
1617 {
1618 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1619 struct ldb_message_element *el = NULL, *el2 = NULL;
1620 struct ldb_message *msg;
1621 const char *attrs[] = { "servicePrincipalName", NULL };
1622 struct ldb_result *res;
1623 const char *dns_hostname = NULL, *old_dns_hostname = NULL,
1624 *sam_accountname = NULL, *old_sam_accountname = NULL;
1625 unsigned int i;
1626 int ret;
1627
1628 el = dsdb_get_single_valued_attr(ac->msg, "dNSHostName",
1629 ac->req->operation);
1630 el2 = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
1631 ac->req->operation);
1632 if ((el == NULL) && (el2 == NULL)) {
1633 /* we are not affected */
1634 return LDB_SUCCESS;
1635 }
1636
1637 /* Create a temporary message for fetching the "dNSHostName" */
1638 if (el != NULL) {
1639 const char *dns_attrs[] = { "dNSHostName", NULL };
1640 msg = ldb_msg_new(ac->msg);
1641 if (msg == NULL) {
1642 return ldb_module_oom(ac->module);
1643 }
1644 ret = ldb_msg_add(msg, el, 0);
1645 if (ret != LDB_SUCCESS) {
1646 return ret;
1647 }
1648 dns_hostname = talloc_steal(ac,
1649 ldb_msg_find_attr_as_string(msg, "dNSHostName", NULL));
1650 talloc_free(msg);
1651
1652 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn,
1653 dns_attrs, DSDB_FLAG_NEXT_MODULE, ac->req);
1654 if (ret == LDB_SUCCESS) {
1655 old_dns_hostname = ldb_msg_find_attr_as_string(res->msgs[0], "dNSHostName", NULL);
1656 }
1657 }
1658
1659 /* Create a temporary message for fetching the "sAMAccountName" */
1660 if (el2 != NULL) {
1661 char *tempstr, *tempstr2;
1662 const char *acct_attrs[] = { "sAMAccountName", NULL };
1663
1664 msg = ldb_msg_new(ac->msg);
1665 if (msg == NULL) {
1666 return ldb_module_oom(ac->module);
1667 }
1668 ret = ldb_msg_add(msg, el2, 0);
1669 if (ret != LDB_SUCCESS) {
1670 return ret;
1671 }
1672 tempstr = talloc_strdup(ac,
1673 ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL));
1674 talloc_free(msg);
1675
1676 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, acct_attrs,
1677 DSDB_FLAG_NEXT_MODULE, ac->req);
1678 if (ret == LDB_SUCCESS) {
1679 tempstr2 = talloc_strdup(ac,
1680 ldb_msg_find_attr_as_string(res->msgs[0],
1681 "sAMAccountName", NULL));
1682 }
1683
1684
1685 /* The "sAMAccountName" needs some additional trimming: we need
1686 * to remove the trailing "$"s if they exist. */
1687 if ((tempstr != NULL) && (tempstr[0] != '\0') &&
1688 (tempstr[strlen(tempstr) - 1] == '$')) {
1689 tempstr[strlen(tempstr) - 1] = '\0';
1690 }
1691 if ((tempstr2 != NULL) && (tempstr2[0] != '\0') &&
1692 (tempstr2[strlen(tempstr2) - 1] == '$')) {
1693 tempstr2[strlen(tempstr2) - 1] = '\0';
1694 }
1695 sam_accountname = tempstr;
1696 old_sam_accountname = tempstr2;
1697 }
1698
1699 if (old_dns_hostname == NULL) {
1700 /* we cannot change when the old name is unknown */
1701 dns_hostname = NULL;
1702 }
1703 if ((old_dns_hostname != NULL) && (dns_hostname != NULL) &&
1704 (strcasecmp(old_dns_hostname, dns_hostname) == 0)) {
1705 /* The "dNSHostName" didn't change */
1706 dns_hostname = NULL;
1707 }
1708
1709 if (old_sam_accountname == NULL) {
1710 /* we cannot change when the old name is unknown */
1711 sam_accountname = NULL;
1712 }
1713 if ((old_sam_accountname != NULL) && (sam_accountname != NULL) &&
1714 (strcasecmp(old_sam_accountname, sam_accountname) == 0)) {
1715 /* The "sAMAccountName" didn't change */
1716 sam_accountname = NULL;
1717 }
1718
1719 if ((dns_hostname == NULL) && (sam_accountname == NULL)) {
1720 /* Well, there are information missing (old name(s)) or the
1721 * names didn't change. We've nothing to do and can exit here */
1722 return LDB_SUCCESS;
1723 }
1724
1725 /* Potential "servicePrincipalName" changes in the same request have to
1726 * be handled before the update (Windows behaviour). */
1727 el = ldb_msg_find_element(ac->msg, "servicePrincipalName");
1728 if (el != NULL) {
1729 msg = ldb_msg_new(ac->msg);
1730 if (msg == NULL) {
1731 return ldb_module_oom(ac->module);
1732 }
1733 msg->dn = ac->msg->dn;
1734
1735 do {
1736 ret = ldb_msg_add(msg, el, el->flags);
1737 if (ret != LDB_SUCCESS) {
1738 return ret;
1739 }
1740
1741 ldb_msg_remove_element(ac->msg, el);
1742
1743 el = ldb_msg_find_element(ac->msg,
1744 "servicePrincipalName");
1745 } while (el != NULL);
1746
1747 ret = dsdb_module_modify(ac->module, msg,
1748 DSDB_FLAG_NEXT_MODULE, ac->req);
1749 if (ret != LDB_SUCCESS) {
1750 return ret;
1751 }
1752 talloc_free(msg);
1753 }
1754
1755 /* Fetch the "servicePrincipalName"s if any */
1756 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1757 DSDB_FLAG_NEXT_MODULE, ac->req, NULL);
1758 if (ret != LDB_SUCCESS) {
1759 return ret;
1760 }
1761 if ((res->count != 1) || (res->msgs[0]->num_elements > 1)) {
1762 return ldb_operr(ldb);
1763 }
1764
1765 if (res->msgs[0]->num_elements == 1) {
1766 /* Yes, we do have "servicePrincipalName"s. First we update them
1767 * locally, that means we do always substitute the current
1768 * "dNSHostName" with the new one and/or "sAMAccountName"
1769 * without "$" with the new one and then we append this to the
1770 * modification request (Windows behaviour). */
1771
1772 for (i = 0; i < res->msgs[0]->elements[0].num_values; i++) {
1773 char *old_str, *new_str, *pos;
1774 const char *tok;
1775
1776 old_str = (char *)
1777 res->msgs[0]->elements[0].values[i].data;
1778
1779 new_str = talloc_strdup(ac->msg,
1780 strtok_r(old_str, "/", &pos));
1781 if (new_str == NULL) {
1782 return ldb_module_oom(ac->module);
1783 }
1784
1785 while ((tok = strtok_r(NULL, "/", &pos)) != NULL) {
1786 if ((dns_hostname != NULL) &&
1787 (strcasecmp(tok, old_dns_hostname) == 0)) {
1788 tok = dns_hostname;
1789 }
1790 if ((sam_accountname != NULL) &&
1791 (strcasecmp(tok, old_sam_accountname) == 0)) {
1792 tok = sam_accountname;
1793 }
1794
1795 new_str = talloc_asprintf(ac->msg, "%s/%s",
1796 new_str, tok);
1797 if (new_str == NULL) {
1798 return ldb_module_oom(ac->module);
1799 }
1800 }
1801
1802 ret = ldb_msg_add_string(ac->msg,
1803 "servicePrincipalName",
1804 new_str);
1805 if (ret != LDB_SUCCESS) {
1806 return ret;
1807 }
1808 }
1809
1810 el = ldb_msg_find_element(ac->msg, "servicePrincipalName");
1811 el->flags = LDB_FLAG_MOD_REPLACE;
1812 }
1813
1814 talloc_free(res);
1815
1816 return LDB_SUCCESS;
1817 }
1818
1819
1820 /* add */
1821 static int samldb_add(struct ldb_module *module, struct ldb_request *req)
1822 {
1823 struct ldb_context *ldb;
1824 struct samldb_ctx *ac;
1825 int ret;
1826
1827 ldb = ldb_module_get_ctx(module);
1828 ldb_debug(ldb, LDB_DEBUG_TRACE, "samldb_add\n");
1829
1830 /* do not manipulate our control entries */
1831 if (ldb_dn_is_special(req->op.add.message->dn)) {
1832 return ldb_next_request(module, req);
1833 }
1834
1835 ac = samldb_ctx_init(module, req);
1836 if (ac == NULL) {
1837 return ldb_operr(ldb);
1838 }
1839
1840 /* build the new msg */
1841 ac->msg = ldb_msg_copy_shallow(ac, req->op.add.message);
1842 if (ac->msg == NULL) {
1843 talloc_free(ac);
1844 ldb_debug(ldb, LDB_DEBUG_FATAL,
1845 "samldb_add: ldb_msg_copy_shallow failed!\n");
1846 return ldb_operr(ldb);
1847 }
1848
1849 if (samdb_find_attribute(ldb, ac->msg,
1850 "objectclass", "user") != NULL) {
1851 ac->type = "user";
1852
1853 ret = samldb_prim_group_trigger(ac);
1854 if (ret != LDB_SUCCESS) {
1855 return ret;
1856 }
1857
1858 ret = samldb_objectclass_trigger(ac);
1859 if (ret != LDB_SUCCESS) {
1860 return ret;
1861 }
1862
1863 return samldb_fill_object(ac);
1864 }
1865
1866 if (samdb_find_attribute(ldb, ac->msg,
1867 "objectclass", "group") != NULL) {
1868 ac->type = "group";
1869
1870 ret = samldb_objectclass_trigger(ac);
1871 if (ret != LDB_SUCCESS) {
1872 return ret;
1873 }
1874
1875 return samldb_fill_object(ac);
1876 }
1877
1878 /* perhaps a foreignSecurityPrincipal? */
1879 if (samdb_find_attribute(ldb, ac->msg,
1880 "objectclass",
1881 "foreignSecurityPrincipal") != NULL) {
1882 return samldb_fill_foreignSecurityPrincipal_object(ac);
1883 }
1884
1885 if (samdb_find_attribute(ldb, ac->msg,
1886 "objectclass", "classSchema") != NULL) {
1887 ret = samldb_schema_info_update(ac);
1888 if (ret != LDB_SUCCESS) {
1889 talloc_free(ac);
1890 return ret;
1891 }
1892
1893 ac->type = "classSchema";
1894 return samldb_fill_object(ac);
1895 }
1896
1897 if (samdb_find_attribute(ldb, ac->msg,
1898 "objectclass", "attributeSchema") != NULL) {
1899 ret = samldb_schema_info_update(ac);
1900 if (ret != LDB_SUCCESS) {
1901 talloc_free(ac);
1902 return ret;
1903 }
1904
1905 ac->type = "attributeSchema";
1906 return samldb_fill_object(ac);
1907 }
1908
1909 talloc_free(ac);
1910
1911 /* nothing matched, go on */
1912 return ldb_next_request(module, req);
1913 }
1914
1915 /* modify */
1916 static int samldb_modify(struct ldb_module *module, struct ldb_request *req)
1917 {
1918 struct ldb_context *ldb;
1919 struct samldb_ctx *ac;
1920 struct ldb_message_element *el, *el2;
1921 bool modified = false;
1922 int ret;
1923
1924 if (ldb_dn_is_special(req->op.mod.message->dn)) {
1925 /* do not manipulate our control entries */
1926 return ldb_next_request(module, req);
1927 }
1928
1929 ldb = ldb_module_get_ctx(module);
1930
1931 /* make sure that "objectSid" is not specified */
1932 el = ldb_msg_find_element(req->op.mod.message, "objectSid");
1933 if (el != NULL) {
1934 ldb_set_errstring(ldb,
1935 "samldb: objectSid must not be specified!");
1936 return LDB_ERR_UNWILLING_TO_PERFORM;
1937 }
1938 /* make sure that "sAMAccountType" is not specified */
1939 el = ldb_msg_find_element(req->op.mod.message, "sAMAccountType");
1940 if (el != NULL) {
1941 ldb_set_errstring(ldb,
1942 "samldb: sAMAccountType must not be specified!");
1943 return LDB_ERR_UNWILLING_TO_PERFORM;
1944 }
1945 /* make sure that "isCriticalSystemObject" is not specified */
1946 el = ldb_msg_find_element(req->op.mod.message, "isCriticalSystemObject");
1947 if (el != NULL) {
1948 if (ldb_request_get_control(req, LDB_CONTROL_RELAX_OID) == NULL) {
1949 ldb_set_errstring(ldb,
1950 "samldb: isCriticalSystemObject must not be specified!");
1951 return LDB_ERR_UNWILLING_TO_PERFORM;
1952 }
1953 }
1954
1955 /* msDS-IntId is not allowed to be modified
1956 * except when modification comes from replication */
1957 if (ldb_msg_find_element(req->op.mod.message, "msDS-IntId")) {
1958 if (!ldb_request_get_control(req,
1959 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
1960 return LDB_ERR_CONSTRAINT_VIOLATION;
1961 }
1962 }
1963
1964 ac = samldb_ctx_init(module, req);
1965 if (ac == NULL) {
1966 return ldb_operr(ldb);
1967 }
1968
1969 /* build the new msg */
1970 ac->msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
1971 if (ac->msg == NULL) {
1972 talloc_free(ac);
1973 ldb_debug(ldb, LDB_DEBUG_FATAL,
1974 "samldb_modify: ldb_msg_copy_shallow failed!\n");
1975 return ldb_operr(ldb);
1976 }
1977
1978 el = ldb_msg_find_element(ac->msg, "primaryGroupID");
1979 if (el != NULL) {
1980 ret = samldb_prim_group_change(ac);
1981 if (ret != LDB_SUCCESS) {
1982 return ret;
1983 }
1984 }
1985
1986 el = ldb_msg_find_element(ac->msg, "userAccountControl");
1987 if (el != NULL) {
1988 modified = true;
1989 ret = samldb_user_account_control_change(ac);
1990 if (ret != LDB_SUCCESS) {
1991 return ret;
1992 }
1993 }
1994
1995 el = ldb_msg_find_element(ac->msg, "groupType");
1996 if (el != NULL) {
1997 modified = true;
1998 ret = samldb_group_type_change(ac);
1999 if (ret != LDB_SUCCESS) {
2000 return ret;
2001 }
2002 }
2003
2004 el = ldb_msg_find_element(ac->msg, "sAMAccountName");
2005 if (el != NULL) {
2006 ret = samldb_sam_accountname_check(ac);
2007 if (ret != LDB_SUCCESS) {
2008 return ret;
2009 }
2010 }
2011
2012 el = ldb_msg_find_element(ac->msg, "member");
2013 if (el != NULL) {
2014 ret = samldb_member_check(ac);
2015 if (ret != LDB_SUCCESS) {
2016 return ret;
2017 }
2018 }
2019
2020 el = ldb_msg_find_element(ac->msg, "description");
2021 if (el != NULL) {
2022 ret = samldb_description_check(ac, &modified);
2023 if (ret != LDB_SUCCESS) {
2024 return ret;
2025 }
2026 }
2027
2028 el = ldb_msg_find_element(ac->msg, "dNSHostName");
2029 el2 = ldb_msg_find_element(ac->msg, "sAMAccountName");
2030 if ((el != NULL) || (el2 != NULL)) {
2031 modified = true;
2032 ret = samldb_service_principal_names_change(ac);
2033 if (ret != LDB_SUCCESS) {
2034 return ret;
2035 }
2036 }
2037
2038 if (modified) {
2039 struct ldb_request *child_req;
2040
2041 /* Now perform the real modifications as a child request */
2042 ret = ldb_build_mod_req(&child_req, ldb, ac,
2043 ac->msg,
2044 req->controls,
2045 req, dsdb_next_callback,
2046 req);
2047 LDB_REQ_SET_LOCATION(child_req);
2048 if (ret != LDB_SUCCESS) {
2049 return ret;
2050 }
2051
2052 return ldb_next_request(module, child_req);
2053 }
2054
2055 talloc_free(ac);
2056
2057 /* no change which interests us, go on */
2058 return ldb_next_request(module, req);
2059 }
2060
2061 /* delete */
2062
2063 static int samldb_prim_group_users_check(struct samldb_ctx *ac)
2064 {
2065 struct ldb_context *ldb;
2066 struct dom_sid *sid;
2067 uint32_t rid;
2068 NTSTATUS status;
2069 int ret;
2070 struct ldb_result *res;
2071 const char *attrs[] = { "objectSid", NULL };
2072 const char *noattrs[] = { NULL };
2073
2074 ldb = ldb_module_get_ctx(ac->module);
2075
2076 /* Finds out the SID/RID of the SAM object */
2077 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->req->op.del.dn, attrs, DSDB_FLAG_NEXT_MODULE, ac->req);
2078 if (ret != LDB_SUCCESS) {
2079 return ret;
2080 }
2081
2082 sid = samdb_result_dom_sid(ac, res->msgs[0], "objectSid");
2083 if (sid == NULL) {
2084 /* No SID - it might not be a SAM object - therefore ok */
2085 return LDB_SUCCESS;
2086 }
2087 status = dom_sid_split_rid(ac, sid, NULL, &rid);
2088 if (!NT_STATUS_IS_OK(status)) {
2089 return ldb_operr(ldb);
2090 }
2091 if (rid == 0) {
2092 /* Special object (security principal?) */
2093 return LDB_SUCCESS;
2094 }
2095
2096 /* Deny delete requests from groups which are primary ones */
2097 ret = dsdb_module_search(ac->module, ac, &res, NULL, LDB_SCOPE_SUBTREE, noattrs,
2098 DSDB_FLAG_NEXT_MODULE,
2099 ac->req,
2100 "(&(primaryGroupID=%u)(objectClass=user))", rid);
2101 if (ret != LDB_SUCCESS) {
2102 return ret;
2103 }
2104 if (res->count > 0) {
2105 return LDB_ERR_ENTRY_ALREADY_EXISTS;
2106 }
2107
2108 return LDB_SUCCESS;
2109 }
2110
2111 static int samldb_delete(struct ldb_module *module, struct ldb_request *req)
2112 {
2113 struct samldb_ctx *ac;
2114 int ret;
2115
2116 if (ldb_dn_is_special(req->op.del.dn)) {
2117 /* do not manipulate our control entries */
2118 return ldb_next_request(module, req);
2119 }
2120
2121 ac = samldb_ctx_init(module, req);
2122 if (ac == NULL) {
2123 return ldb_operr(ldb_module_get_ctx(module));
2124 }
2125
2126 ret = samldb_prim_group_users_check(ac);
2127 if (ret != LDB_SUCCESS) {
2128 return ret;
2129 }
2130
2131 talloc_free(ac);
2132
2133 return ldb_next_request(module, req);
2134 }
2135
2136 /* extended */
2137
2138 static int samldb_extended_allocate_rid_pool(struct ldb_module *module, struct ldb_request *req)
2139 {
2140 struct ldb_context *ldb = ldb_module_get_ctx(module);
2141 struct dsdb_fsmo_extended_op *exop;
2142 int ret;
2143
2144 exop = talloc_get_type(req->op.extended.data,
2145 struct dsdb_fsmo_extended_op);
2146 if (!exop) {
2147 ldb_set_errstring(ldb,
2148 "samldb_extended_allocate_rid_pool: invalid extended data");
2149 return LDB_ERR_PROTOCOL_ERROR;
2150 }
2151
2152 ret = ridalloc_allocate_rid_pool_fsmo(module, exop, req);
2153 if (ret != LDB_SUCCESS) {
2154 return ret;
2155 }
2156
2157 return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
2158 }
2159
2160 static int samldb_extended(struct ldb_module *module, struct ldb_request *req)
2161 {
2162 if (strcmp(req->op.extended.oid, DSDB_EXTENDED_ALLOCATE_RID_POOL) == 0) {
2163 return samldb_extended_allocate_rid_pool(module, req);
2164 }
2165
2166 return ldb_next_request(module, req);
2167 }
2168
2169
2170 static const struct ldb_module_ops ldb_samldb_module_ops = {
2171 .name = "samldb",
2172 .add = samldb_add,
2173 .modify = samldb_modify,
2174 .del = samldb_delete,
2175 .extended = samldb_extended
2176 };
2177
2178
2179 int ldb_samldb_module_init(const char *version)
2180 {
2181 LDB_MODULE_CHECK_VERSION(version);
2182 return ldb_register_module(&ldb_samldb_module_ops);
2183 }
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