4 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
5 Copyright (C) Simo Sorce 2004-2008
6 Copyright (C) Matthias Dieter Wallnöfer 2009-2010
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.
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.
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/>.
25 * Component: ldb samldb module
27 * Description: various internal DSDB triggers - most for SAM specific objects
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"
41 #include "param/param.h"
42 #include "libds/common/flag_mapping.h"
46 typedef int (*samldb_step_fn_t)(struct samldb_ctx *);
49 struct samldb_step *next;
54 struct ldb_module *module;
55 struct ldb_request *req;
57 /* used for add operations */
60 /* the resulting message */
61 struct ldb_message *msg;
63 /* used in "samldb_find_for_defaultObjectCategory" */
64 struct ldb_dn *dn, *res_dn;
66 /* all the async steps necessary to complete the operation */
67 struct samldb_step *steps;
68 struct samldb_step *curstep;
70 /* If someone set an ares to forward controls and response back to the caller */
71 struct ldb_reply *ares;
74 static struct samldb_ctx *samldb_ctx_init(struct ldb_module *module,
75 struct ldb_request *req)
77 struct ldb_context *ldb;
78 struct samldb_ctx *ac;
80 ldb = ldb_module_get_ctx(module);
82 ac = talloc_zero(req, struct samldb_ctx);
94 static int samldb_add_step(struct samldb_ctx *ac, samldb_step_fn_t fn)
96 struct samldb_step *step, *stepper;
98 step = talloc_zero(ac, struct samldb_step);
100 return ldb_oom(ldb_module_get_ctx(ac->module));
105 if (ac->steps == NULL) {
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;
119 static int samldb_first_step(struct samldb_ctx *ac)
121 if (ac->steps == NULL) {
122 return ldb_operr(ldb_module_get_ctx(ac->module));
125 ac->curstep = ac->steps;
126 return ac->curstep->fn(ac);
129 static int samldb_next_step(struct samldb_ctx *ac)
131 if (ac->curstep->next) {
132 ac->curstep = ac->curstep->next;
133 return ac->curstep->fn(ac);
136 /* We exit the samldb module here. If someone set an "ares" to forward
137 * controls and response back to the caller, use them. */
139 return ldb_module_done(ac->req, ac->ares->controls,
140 ac->ares->response, LDB_SUCCESS);
142 return ldb_module_done(ac->req, NULL, NULL, LDB_SUCCESS);
147 /* sAMAccountName handling */
149 static int samldb_generate_sAMAccountName(struct ldb_context *ldb,
150 struct ldb_message *msg)
154 /* Format: $000000-000000000000 */
156 name = talloc_asprintf(msg, "$%.6X-%.6X%.6X",
157 (unsigned int)generate_random(),
158 (unsigned int)generate_random(),
159 (unsigned int)generate_random());
163 return ldb_msg_add_steal_string(msg, "sAMAccountName", name);
166 static int samldb_check_sAMAccountName(struct samldb_ctx *ac)
168 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
171 struct ldb_result *res;
172 const char *noattrs[] = { NULL };
174 if (ldb_msg_find_element(ac->msg, "sAMAccountName") == NULL) {
175 ret = samldb_generate_sAMAccountName(ldb, ac->msg);
176 if (ret != LDB_SUCCESS) {
181 name = ldb_msg_find_attr_as_string(ac->msg, "sAMAccountName", 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;
189 ret = dsdb_module_search(ac->module, ac, &res,
190 NULL, LDB_SCOPE_SUBTREE, noattrs,
191 DSDB_FLAG_NEXT_MODULE,
193 "(sAMAccountName=%s)",
194 ldb_binary_encode_string(ac, name));
195 if (ret != LDB_SUCCESS) {
198 if (res->count != 0) {
199 ldb_asprintf_errstring(ldb,
200 "samldb: Account name (sAMAccountName) '%s' already in use!",
203 return LDB_ERR_ENTRY_ALREADY_EXISTS;
207 return samldb_next_step(ac);
211 static bool samldb_msg_add_sid(struct ldb_message *msg,
213 const struct dom_sid *sid)
216 enum ndr_err_code ndr_err;
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)) {
223 return (ldb_msg_add_value(msg, name, &v, NULL) == 0);
227 /* allocate a SID using our RID Set */
228 static int samldb_allocate_sid(struct samldb_ctx *ac)
232 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
235 ret = ridalloc_allocate_rid(ac->module, &rid, ac->req);
236 if (ret != LDB_SUCCESS) {
240 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
242 return ldb_module_oom(ac->module);
245 if ( ! samldb_msg_add_sid(ac->msg, "objectSid", sid)) {
246 return ldb_operr(ldb);
249 return samldb_next_step(ac);
253 see if a krbtgt_number is available
255 static bool samldb_krbtgtnumber_available(struct samldb_ctx *ac,
256 uint32_t krbtgt_number)
258 TALLOC_CTX *tmp_ctx = talloc_new(ac);
259 struct ldb_result *res;
260 const char *no_attrs[] = { NULL };
263 ret = dsdb_module_search(ac->module, tmp_ctx, &res, NULL,
264 LDB_SCOPE_SUBTREE, no_attrs,
265 DSDB_FLAG_NEXT_MODULE,
267 "(msDC-SecondaryKrbTgtNumber=%u)",
269 if (ret == LDB_SUCCESS && res->count == 0) {
270 talloc_free(tmp_ctx);
273 talloc_free(tmp_ctx);
277 /* special handling for add in RODC join */
278 static int samldb_rodc_add(struct samldb_ctx *ac)
280 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
281 uint32_t krbtgt_number, i_start, i;
284 struct ldb_val newpass_utf16;
286 /* find a unused msDC-SecondaryKrbTgtNumber */
287 i_start = generate_random() & 0xFFFF;
292 for (i=i_start; i<=0xFFFF; i++) {
293 if (samldb_krbtgtnumber_available(ac, i)) {
298 for (i=1; i<i_start; i++) {
299 if (samldb_krbtgtnumber_available(ac, i)) {
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;
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);
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);
323 ret = ldb_msg_add_fmt(ac->msg, "sAMAccountName", "krbtgt_%u",
325 if (ret != LDB_SUCCESS) {
326 return ldb_operr(ldb);
329 newpass = generate_random_password(ac->msg, 128, 255);
330 if (newpass == NULL) {
331 return ldb_operr(ldb);
334 if (!convert_string_talloc(ac,
336 newpass, strlen(newpass),
337 (void *)&newpass_utf16.data,
338 &newpass_utf16.length)) {
339 ldb_asprintf_errstring(ldb,
341 "failed to generate UTF16 password from random password");
342 return LDB_ERR_OPERATIONS_ERROR;
344 ret = ldb_msg_add_steal_value(ac->msg, "clearTextPassword", &newpass_utf16);
345 if (ret != LDB_SUCCESS) {
346 return ldb_operr(ldb);
349 return samldb_next_step(ac);
352 static int samldb_find_for_defaultObjectCategory(struct samldb_ctx *ac)
354 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
355 struct ldb_result *res;
356 const char *no_attrs[] = { NULL };
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,
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;
378 if ((ret != LDB_ERR_NO_SUCH_OBJECT) && (ret != LDB_SUCCESS)) {
384 return samldb_next_step(ac);
388 * msDS-IntId attributeSchema attribute handling
389 * during LDB_ADD request processing
391 static int samldb_add_handle_msDS_IntId(struct samldb_ctx *ac)
396 int32_t system_flags;
397 struct ldb_context *ldb;
398 struct ldb_result *ldb_res;
399 struct ldb_dn *schema_dn;
401 ldb = ldb_module_get_ctx(ac->module);
402 schema_dn = ldb_get_schema_basedn(ldb);
404 /* replicated update should always go through */
405 if (ldb_request_get_control(ac->req,
406 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
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;
416 /* do not generate msDS-IntId if Relax control is passed */
417 if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
421 /* check Functional Level */
422 if (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003) {
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) {
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;
437 /* probe id values until unique one is found */
440 if (msds_intid > 0xBFFFFFFF) {
441 msds_intid = 0x80000001;
444 ret = dsdb_module_search(ac->module, ac,
446 schema_dn, LDB_SCOPE_ONELEVEL, NULL,
447 DSDB_FLAG_NEXT_MODULE,
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",
455 return ldb_operr(ldb);
457 id_exists = (ldb_res->count > 0);
459 talloc_free(ldb_res);
462 return samdb_msg_add_int(ldb, ac->msg, ac->msg, "msDS-IntId",
468 * samldb_add_entry (async)
471 static int samldb_add_entry_callback(struct ldb_request *req,
472 struct ldb_reply *ares)
474 struct ldb_context *ldb;
475 struct samldb_ctx *ac;
478 ac = talloc_get_type(req->context, struct samldb_ctx);
479 ldb = ldb_module_get_ctx(ac->module);
482 return ldb_module_done(ac->req, NULL, NULL,
483 LDB_ERR_OPERATIONS_ERROR);
486 if (ares->type == LDB_REPLY_REFERRAL) {
487 return ldb_module_send_referral(ac->req, ares->referral);
490 if (ares->error != LDB_SUCCESS) {
491 return ldb_module_done(ac->req, ares->controls,
492 ares->response, ares->error);
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);
501 /* The caller may wish to get controls back from the add */
502 ac->ares = talloc_steal(ac, ares);
504 ret = samldb_next_step(ac);
505 if (ret != LDB_SUCCESS) {
506 return ldb_module_done(ac->req, NULL, NULL, ret);
511 static int samldb_add_entry(struct samldb_ctx *ac)
513 struct ldb_context *ldb;
514 struct ldb_request *req;
517 ldb = ldb_module_get_ctx(ac->module);
519 ret = ldb_build_add_req(&req, ldb, ac,
522 ac, samldb_add_entry_callback,
524 LDB_REQ_SET_LOCATION(req);
525 if (ret != LDB_SUCCESS) {
529 return ldb_next_request(ac->module, req);
533 * return true if msg carries an attributeSchema that is intended to be RODC
534 * filtered but is also a system-critical attribute.
536 static bool check_rodc_critical_attribute(struct ldb_message *msg)
538 uint32_t schemaFlagsEx, searchFlags, rodc_filtered_flags;
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);
545 if ((schemaFlagsEx & SCHEMA_FLAG_ATTR_IS_CRITICAL) &&
546 ((searchFlags & rodc_filtered_flags) == rodc_filtered_flags)) {
554 static int samldb_fill_object(struct samldb_ctx *ac)
556 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
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;
570 /* check if we have a valid sAMAccountName */
571 ret = samldb_add_step(ac, samldb_check_sAMAccountName);
572 if (ret != LDB_SUCCESS) return ret;
574 ret = samldb_add_step(ac, samldb_add_entry);
575 if (ret != LDB_SUCCESS) return ret;
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;
582 ret = samldb_add_step(ac, samldb_add_entry);
583 if (ret != LDB_SUCCESS) return ret;
585 } else if (strcmp(ac->type, "classSchema") == 0) {
586 const struct ldb_val *rdn_value, *def_obj_cat_val;
588 ret = samdb_find_or_add_attribute(ldb, ac->msg,
590 if (ret != LDB_SUCCESS) return ret;
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;
600 rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
601 if (rdn_value == NULL) {
602 return ldb_operr(ldb);
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) {
615 if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) {
618 guid = GUID_random();
619 ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID");
620 if (ret != LDB_SUCCESS) {
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".
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;
644 /* "defaultObjectCategory" has not been set by the
645 * caller. Use the entry DN for it. */
646 ac->dn = ac->msg->dn;
648 ret = ldb_msg_add_string(ac->msg, "defaultObjectCategory",
649 ldb_dn_alloc_linearized(ac->msg, ac->dn));
650 if (ret != LDB_SUCCESS) {
656 ret = samldb_add_step(ac, samldb_add_entry);
657 if (ret != LDB_SUCCESS) return ret;
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;
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);
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) {
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;
690 ret = samdb_find_or_add_attribute(ldb, ac->msg,
691 "isSingleValued", "FALSE");
692 if (ret != LDB_SUCCESS) return ret;
694 if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) {
697 guid = GUID_random();
698 ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID");
699 if (ret != LDB_SUCCESS) {
705 /* handle msDS-IntID attribute */
706 ret = samldb_add_handle_msDS_IntId(ac);
707 if (ret != LDB_SUCCESS) return ret;
709 ret = samldb_add_step(ac, samldb_add_entry);
710 if (ret != LDB_SUCCESS) return ret;
713 ldb_asprintf_errstring(ldb,
714 "Invalid entry type!");
715 return LDB_ERR_OPERATIONS_ERROR;
718 return samldb_first_step(ac);
721 static int samldb_fill_foreignSecurityPrincipal_object(struct samldb_ctx *ac)
723 struct ldb_context *ldb;
724 const struct ldb_val *rdn_value;
728 ldb = ldb_module_get_ctx(ac->module);
730 sid = samdb_result_dom_sid(ac->msg, ac->msg, "objectSid");
732 rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
733 if (rdn_value == NULL) {
734 return ldb_operr(ldb);
736 sid = dom_sid_parse_talloc(ac->msg,
737 (const char *)rdn_value->data);
739 ldb_set_errstring(ldb,
740 "samldb: No valid SID found in ForeignSecurityPrincipal CN!");
741 return LDB_ERR_CONSTRAINT_VIOLATION;
743 if (! samldb_msg_add_sid(ac->msg, "objectSid", sid)) {
744 return ldb_operr(ldb);
748 /* finally proceed with adding the entry */
749 ret = samldb_add_step(ac, samldb_add_entry);
750 if (ret != LDB_SUCCESS) return ret;
752 return samldb_first_step(ac);
755 static int samldb_schema_info_update(struct samldb_ctx *ac)
758 struct ldb_context *ldb;
759 struct dsdb_schema *schema;
761 /* replicated update should always go through */
762 if (ldb_request_get_control(ac->req,
763 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
767 /* do not update schemaInfo during provisioning */
768 if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
772 ldb = ldb_module_get_ctx(ac->module);
773 schema = dsdb_get_schema(ldb, NULL);
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);
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",
794 * "Objectclass" trigger (MS-SAMR 3.1.1.8.1)
796 * Has to be invoked on "add" and "modify" operations on "user", "computer" and
798 * ac->msg contains the "add"/"modify" message
799 * ac->type contains the object type (main objectclass)
801 static int samldb_objectclass_trigger(struct samldb_ctx *ac)
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;
811 /* make sure that "sAMAccountType" is not specified */
812 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
814 ldb_set_errstring(ldb,
815 "samldb: sAMAccountType must not be specified!");
816 return LDB_ERR_UNWILLING_TO_PERFORM;
819 /* Step 1: objectSid assignment */
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;
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;
841 if (strcmp(ac->type, "user") == 0) {
842 bool uac_generated = false;
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,
853 if (ret != LDB_SUCCESS) return ret;
854 ret = samdb_find_or_add_attribute(ldb, ac->msg,
856 if (ret != LDB_SUCCESS) return ret;
857 ret = samdb_find_or_add_attribute(ldb, ac->msg,
859 if (ret != LDB_SUCCESS) return ret;
860 ret = samdb_find_or_add_attribute(ldb, ac->msg,
862 if (ret != LDB_SUCCESS) return ret;
863 ret = samdb_find_or_add_attribute(ldb, ac->msg,
865 if (ret != LDB_SUCCESS) return ret;
866 ret = samdb_find_or_add_attribute(ldb, ac->msg,
868 if (ret != LDB_SUCCESS) return ret;
869 ret = samdb_find_or_add_attribute(ldb, ac->msg,
871 if (ret != LDB_SUCCESS) return ret;
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",
880 if (ret != LDB_SUCCESS) {
883 uac_generated = true;
886 el = ldb_msg_find_element(ac->msg, "userAccountControl");
888 uint32_t user_account_control, account_type;
890 /* Step 1.3: "userAccountControl" -> "sAMAccountType" mapping */
891 user_account_control = ldb_msg_find_attr_as_uint(ac->msg,
892 "userAccountControl",
895 /* Temporary duplicate accounts aren't allowed */
896 if ((user_account_control & UF_TEMP_DUPLICATE_ACCOUNT) != 0) {
897 return LDB_ERR_OTHER;
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;
905 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
908 if (ret != LDB_SUCCESS) {
911 el2 = ldb_msg_find_element(ac->msg, "sAMAccountType");
912 el2->flags = LDB_FLAG_MOD_REPLACE;
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",
919 if (ret != LDB_SUCCESS) {
922 el2 = ldb_msg_find_element(ac->msg,
923 "isCriticalSystemObject");
924 el2->flags = LDB_FLAG_MOD_REPLACE;
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) {
935 el2 = ldb_msg_find_element(ac->msg,
937 el2->flags = LDB_FLAG_MOD_REPLACE;
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
945 user_account_control |= UF_ACCOUNTDISABLE;
946 user_account_control |= UF_PASSWD_NOTREQD;
948 ret = samdb_msg_set_uint(ldb, ac->msg, ac->msg,
949 "userAccountControl",
950 user_account_control);
951 if (ret != LDB_SUCCESS) {
957 } else if (strcmp(ac->type, "group") == 0) {
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;
968 /* Step 2.3: "groupType" -> "sAMAccountType" */
969 el = ldb_msg_find_element(ac->msg, "groupType");
971 uint32_t group_type, account_type;
973 group_type = ldb_msg_find_attr_as_uint(ac->msg,
976 /* The creation of builtin groups requires the
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;
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;
990 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
993 if (ret != LDB_SUCCESS) {
996 el2 = ldb_msg_find_element(ac->msg, "sAMAccountType");
997 el2->flags = LDB_FLAG_MOD_REPLACE;
1005 * "Primary group ID" trigger (MS-SAMR 3.1.1.8.2)
1007 * Has to be invoked on "add" and "modify" operations on "user" and "computer"
1009 * ac->msg contains the "add"/"modify" message
1012 static int samldb_prim_group_set(struct samldb_ctx *ac)
1014 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1016 struct dom_sid *sid;
1017 struct ldb_result *res;
1019 const char *noattrs[] = { NULL };
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 */
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;
1032 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
1034 return ldb_operr(ldb);
1037 ret = dsdb_module_search(ac->module, ac, &res, NULL, LDB_SCOPE_SUBTREE,
1038 noattrs, DSDB_FLAG_NEXT_MODULE,
1041 ldap_encode_ndr_dom_sid(ac, sid));
1042 if (ret != LDB_SUCCESS) {
1045 if (res->count != 1) {
1047 ldb_asprintf_errstring(ldb,
1048 "Failed to find primary group with RID %u!",
1050 return LDB_ERR_UNWILLING_TO_PERFORM;
1057 static int samldb_prim_group_change(struct samldb_ctx *ac)
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;
1068 const char *noattrs[] = { NULL };
1070 el = dsdb_get_single_valued_attr(ac->msg, "primaryGroupID",
1071 ac->req->operation);
1073 /* we are not affected */
1077 /* Fetch information from the existing object */
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) {
1084 if (res->count != 1) {
1085 return ldb_operr(ldb);
1088 /* Finds out the DN of the old primary group */
1090 prev_rid = ldb_msg_find_attr_as_uint(res->msgs[0], "primaryGroupID",
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;
1099 prev_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), prev_rid);
1100 if (prev_sid == NULL) {
1101 return ldb_operr(ldb);
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. */
1108 msg = ldb_msg_new(ac->msg);
1110 return ldb_module_oom(ac->module);
1112 ret = ldb_msg_add(msg, el, 0);
1113 if (ret != LDB_SUCCESS) {
1116 new_rid = ldb_msg_find_attr_as_uint(msg, "primaryGroupID", (uint32_t) -1);
1118 if (new_rid == (uint32_t) -1) {
1119 /* we aren't affected of any primary group change */
1123 if (prev_rid == new_rid) {
1127 ret = dsdb_module_search(ac->module, ac, &group_res, NULL, LDB_SCOPE_SUBTREE,
1128 noattrs, DSDB_FLAG_NEXT_MODULE,
1131 ldap_encode_ndr_dom_sid(ac, prev_sid));
1132 if (ret != LDB_SUCCESS) {
1135 if (group_res->count != 1) {
1136 return ldb_operr(ldb);
1138 prev_prim_group_dn = group_res->msgs[0]->dn;
1140 new_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), new_rid);
1141 if (new_sid == NULL) {
1142 return ldb_operr(ldb);
1145 ret = dsdb_module_search(ac->module, ac, &group_res, NULL, LDB_SCOPE_SUBTREE,
1146 noattrs, DSDB_FLAG_NEXT_MODULE,
1149 ldap_encode_ndr_dom_sid(ac, new_sid));
1150 if (ret != LDB_SUCCESS) {
1153 if (group_res->count != 1) {
1154 /* Here we know if the specified new primary group candidate is
1156 return LDB_ERR_UNWILLING_TO_PERFORM;
1158 new_prim_group_dn = group_res->msgs[0]->dn;
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));
1165 return LDB_ERR_UNWILLING_TO_PERFORM;
1168 /* Remove the "member" attribute on the new primary group */
1169 msg = ldb_msg_new(ac->msg);
1171 return ldb_module_oom(ac->module);
1173 msg->dn = new_prim_group_dn;
1175 ret = samdb_msg_add_delval(ldb, msg, msg, "member",
1176 ldb_dn_get_linearized(ac->msg->dn));
1177 if (ret != LDB_SUCCESS) {
1181 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
1182 if (ret != LDB_SUCCESS) {
1187 /* Add a "member" attribute for the previous primary group */
1188 msg = ldb_msg_new(ac->msg);
1190 return ldb_module_oom(ac->module);
1192 msg->dn = prev_prim_group_dn;
1194 ret = samdb_msg_add_addval(ldb, msg, msg, "member",
1195 ldb_dn_get_linearized(ac->msg->dn));
1196 if (ret != LDB_SUCCESS) {
1200 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
1201 if (ret != LDB_SUCCESS) {
1209 static int samldb_prim_group_trigger(struct samldb_ctx *ac)
1213 if (ac->req->operation == LDB_ADD) {
1214 ret = samldb_prim_group_set(ac);
1216 ret = samldb_prim_group_change(ac);
1224 * This function is called on LDB modify operations. It performs some additions/
1225 * replaces on the current LDB message when "userAccountControl" changes.
1227 static int samldb_user_account_control_change(struct samldb_ctx *ac)
1229 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1230 uint32_t user_account_control, old_user_account_control, account_type;
1231 struct ldb_message_element *el;
1232 struct ldb_message *tmp_msg;
1234 struct ldb_result *res;
1235 const char *attrs[] = { "userAccountControl", NULL };
1237 el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl",
1238 ac->req->operation);
1240 /* we are not affected */
1244 /* Create a temporary message for fetching the "userAccountControl" */
1245 tmp_msg = ldb_msg_new(ac->msg);
1246 if (tmp_msg == NULL) {
1247 return ldb_module_oom(ac->module);
1249 ret = ldb_msg_add(tmp_msg, el, 0);
1250 if (ret != LDB_SUCCESS) {
1253 user_account_control = ldb_msg_find_attr_as_uint(tmp_msg,
1254 "userAccountControl",
1256 talloc_free(tmp_msg);
1258 /* Temporary duplicate accounts aren't allowed */
1259 if ((user_account_control & UF_TEMP_DUPLICATE_ACCOUNT) != 0) {
1260 return LDB_ERR_OTHER;
1263 /* Fetch the old "userAccountControl" */
1264 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
1265 DSDB_FLAG_NEXT_MODULE, ac->req);
1266 if (ret != LDB_SUCCESS) {
1269 old_user_account_control = ldb_msg_find_attr_as_uint(res->msgs[0], "userAccountControl", 0);
1270 if (old_user_account_control == 0) {
1271 return ldb_operr(ldb);
1275 * The functions "ds_uf2atype" and "ds_uf2prim_group_rid" are used as
1276 * detectors for account type changes.
1277 * So if the account type does change then we need to adjust the
1278 * "sAMAccountType", the "isCriticalSystemObject" and the
1279 * "primaryGroupID" attribute.
1281 if ((ds_uf2atype(user_account_control)
1282 == ds_uf2atype(old_user_account_control)) &&
1283 (ds_uf2prim_group_rid(user_account_control)
1284 == ds_uf2prim_group_rid(old_user_account_control))) {
1288 account_type = ds_uf2atype(user_account_control);
1289 if (account_type == 0) {
1290 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
1291 return LDB_ERR_UNWILLING_TO_PERFORM;
1293 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType",
1295 if (ret != LDB_SUCCESS) {
1298 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
1299 el->flags = LDB_FLAG_MOD_REPLACE;
1301 if (user_account_control
1302 & (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
1303 ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
1305 if (ret != LDB_SUCCESS) {
1308 el = ldb_msg_find_element(ac->msg,
1309 "isCriticalSystemObject");
1310 el->flags = LDB_FLAG_MOD_REPLACE;
1313 if (!ldb_msg_find_element(ac->msg, "primaryGroupID")) {
1314 uint32_t rid = ds_uf2prim_group_rid(user_account_control);
1315 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
1316 "primaryGroupID", rid);
1317 if (ret != LDB_SUCCESS) {
1320 el = ldb_msg_find_element(ac->msg,
1322 el->flags = LDB_FLAG_MOD_REPLACE;
1328 static int samldb_group_type_change(struct samldb_ctx *ac)
1330 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1331 uint32_t group_type, old_group_type, account_type;
1332 struct ldb_message_element *el;
1333 struct ldb_message *tmp_msg;
1335 struct ldb_result *res;
1336 const char *attrs[] = { "groupType", NULL };
1338 el = dsdb_get_single_valued_attr(ac->msg, "groupType",
1339 ac->req->operation);
1341 /* we are not affected */
1345 /* Create a temporary message for fetching the "groupType" */
1346 tmp_msg = ldb_msg_new(ac->msg);
1347 if (tmp_msg == NULL) {
1348 return ldb_module_oom(ac->module);
1350 ret = ldb_msg_add(tmp_msg, el, 0);
1351 if (ret != LDB_SUCCESS) {
1354 group_type = ldb_msg_find_attr_as_uint(tmp_msg, "groupType", 0);
1355 talloc_free(tmp_msg);
1357 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
1358 DSDB_FLAG_NEXT_MODULE, ac->req);
1359 if (ret != LDB_SUCCESS) {
1362 old_group_type = ldb_msg_find_attr_as_uint(res->msgs[0], "groupType", 0);
1363 if (old_group_type == 0) {
1364 return ldb_operr(ldb);
1367 /* Group type switching isn't so easy as it seems: We can only
1368 * change in this directions: global <-> universal <-> local
1369 * On each step also the group type itself
1370 * (security/distribution) is variable. */
1372 if (ldb_request_get_control(ac->req, LDB_CONTROL_PROVISION_OID) == NULL) {
1373 switch (group_type) {
1374 case GTYPE_SECURITY_GLOBAL_GROUP:
1375 case GTYPE_DISTRIBUTION_GLOBAL_GROUP:
1376 /* change to "universal" allowed */
1377 if ((old_group_type == GTYPE_SECURITY_DOMAIN_LOCAL_GROUP) ||
1378 (old_group_type == GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP)) {
1379 ldb_set_errstring(ldb,
1380 "samldb: Change from security/distribution local group forbidden!");
1381 return LDB_ERR_UNWILLING_TO_PERFORM;
1385 case GTYPE_SECURITY_UNIVERSAL_GROUP:
1386 case GTYPE_DISTRIBUTION_UNIVERSAL_GROUP:
1387 /* each change allowed */
1389 case GTYPE_SECURITY_DOMAIN_LOCAL_GROUP:
1390 case GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP:
1391 /* change to "universal" allowed */
1392 if ((old_group_type == GTYPE_SECURITY_GLOBAL_GROUP) ||
1393 (old_group_type == GTYPE_DISTRIBUTION_GLOBAL_GROUP)) {
1394 ldb_set_errstring(ldb,
1395 "samldb: Change from security/distribution global group forbidden!");
1396 return LDB_ERR_UNWILLING_TO_PERFORM;
1400 case GTYPE_SECURITY_BUILTIN_LOCAL_GROUP:
1402 /* we don't allow this "groupType" values */
1403 return LDB_ERR_UNWILLING_TO_PERFORM;
1408 account_type = ds_gtype2atype(group_type);
1409 if (account_type == 0) {
1410 ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
1411 return LDB_ERR_UNWILLING_TO_PERFORM;
1413 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType",
1415 if (ret != LDB_SUCCESS) {
1418 el = ldb_msg_find_element(ac->msg, "sAMAccountType");
1419 el->flags = LDB_FLAG_MOD_REPLACE;
1424 static int samldb_sam_accountname_check(struct samldb_ctx *ac)
1426 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1427 const char *no_attrs[] = { NULL };
1428 struct ldb_result *res;
1429 const char *sam_accountname, *enc_str;
1430 struct ldb_message_element *el;
1431 struct ldb_message *tmp_msg;
1434 el = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
1435 ac->req->operation);
1437 /* we are not affected */
1441 /* Create a temporary message for fetching the "sAMAccountName" */
1442 tmp_msg = ldb_msg_new(ac->msg);
1443 if (tmp_msg == NULL) {
1444 return ldb_module_oom(ac->module);
1446 ret = ldb_msg_add(tmp_msg, el, 0);
1447 if (ret != LDB_SUCCESS) {
1450 sam_accountname = talloc_steal(ac,
1451 ldb_msg_find_attr_as_string(tmp_msg, "sAMAccountName", NULL));
1452 talloc_free(tmp_msg);
1454 if (sam_accountname == NULL) {
1455 /* The "sAMAccountName" cannot be nothing */
1456 ldb_set_errstring(ldb,
1457 "samldb: Empty account names aren't allowed!");
1458 return LDB_ERR_UNWILLING_TO_PERFORM;
1461 enc_str = ldb_binary_encode_string(ac, sam_accountname);
1462 if (enc_str == NULL) {
1463 return ldb_module_oom(ac->module);
1466 /* Make sure that a "sAMAccountName" is only used once */
1468 ret = dsdb_module_search(ac->module, ac, &res, NULL, LDB_SCOPE_SUBTREE, no_attrs,
1469 DSDB_FLAG_NEXT_MODULE, ac->req,
1470 "(sAMAccountName=%s)", enc_str);
1471 if (ret != LDB_SUCCESS) {
1474 if (res->count > 1) {
1475 return ldb_operr(ldb);
1476 } else if (res->count == 1) {
1477 if (ldb_dn_compare(res->msgs[0]->dn, ac->msg->dn) != 0) {
1478 ldb_asprintf_errstring(ldb,
1479 "samldb: Account name (sAMAccountName) '%s' already in use!",
1481 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1489 static int samldb_member_check(struct samldb_ctx *ac)
1491 static const char * const attrs[] = { "objectSid", "member", NULL };
1492 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1493 struct ldb_message_element *el;
1494 struct ldb_dn *member_dn;
1495 struct dom_sid *sid;
1496 struct ldb_result *res;
1497 struct dom_sid *group_sid;
1502 /* Fetch information from the existing object */
1504 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1505 DSDB_FLAG_NEXT_MODULE, ac->req, NULL);
1506 if (ret != LDB_SUCCESS) {
1509 if (res->count != 1) {
1510 return ldb_operr(ldb);
1513 group_sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
1514 if (group_sid == NULL) {
1515 return ldb_operr(ldb);
1518 /* We've to walk over all modification entries and consider the "member"
1520 for (i = 0; i < ac->msg->num_elements; i++) {
1521 if (ldb_attr_cmp(ac->msg->elements[i].name, "member") != 0) {
1525 el = &ac->msg->elements[i];
1526 for (j = 0; j < el->num_values; j++) {
1527 struct ldb_message_element *mo;
1528 struct ldb_result *group_res;
1529 const char *group_attrs[] = { "primaryGroupID" , NULL };
1530 uint32_t prim_group_rid;
1532 member_dn = ldb_dn_from_ldb_val(ac, ldb,
1534 if (!ldb_dn_validate(member_dn)) {
1535 return ldb_operr(ldb);
1538 /* The "member" attribute can be modified with the
1539 * following restrictions (beside a valid DN):
1541 * - "add" operations can only be performed when the
1542 * member still doesn't exist - if not then return
1543 * ERR_ENTRY_ALREADY_EXISTS (not
1544 * ERR_ATTRIBUTE_OR_VALUE_EXISTS!)
1545 * - "delete" operations can only be performed when the
1546 * member does exist - if not then return
1547 * ERR_UNWILLING_TO_PERFORM (not
1548 * ERR_NO_SUCH_ATTRIBUTE!)
1549 * - primary group check
1551 mo = samdb_find_attribute(ldb, res->msgs[0], "member",
1552 ldb_dn_get_linearized(member_dn));
1559 if ((cnt > 0) && (LDB_FLAG_MOD_TYPE(el->flags)
1560 == LDB_FLAG_MOD_ADD)) {
1561 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1563 if ((cnt == 0) && LDB_FLAG_MOD_TYPE(el->flags)
1564 == LDB_FLAG_MOD_DELETE) {
1565 return LDB_ERR_UNWILLING_TO_PERFORM;
1568 /* Denies to add "member"s to groups which are primary
1569 * ones for them - in this case return
1570 * ERR_ENTRY_ALREADY_EXISTS. */
1572 ret = dsdb_module_search_dn(ac->module, ac, &group_res,
1573 member_dn, group_attrs,
1574 DSDB_FLAG_NEXT_MODULE, ac->req);
1575 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
1576 /* member DN doesn't exist yet */
1579 if (ret != LDB_SUCCESS) {
1582 prim_group_rid = ldb_msg_find_attr_as_uint(group_res->msgs[0], "primaryGroupID", (uint32_t)-1);
1583 if (prim_group_rid == (uint32_t) -1) {
1584 /* the member hasn't to be a user account ->
1585 * therefore no check needed in this case. */
1589 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb),
1592 return ldb_operr(ldb);
1595 if (dom_sid_equal(group_sid, sid)) {
1596 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1606 /* SAM objects have special rules regarding the "description" attribute on
1607 * modify operations. */
1608 static int samldb_description_check(struct samldb_ctx *ac, bool *modified)
1610 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1611 const char * const attrs[] = { "objectClass", "description", NULL };
1612 struct ldb_result *res;
1616 /* Fetch information from the existing object */
1617 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1618 DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED, ac->req,
1619 "(|(objectclass=user)(objectclass=group)(objectclass=samDomain)(objectclass=samServer))");
1620 if (ret != LDB_SUCCESS) {
1621 /* don't treat it specially ... let normal error codes
1622 happen from other places */
1623 ldb_reset_err_string(ldb);
1626 if (res->count == 0) {
1627 /* we didn't match the filter */
1632 /* We've to walk over all modification entries and consider the
1633 * "description" ones. */
1634 for (i = 0; i < ac->msg->num_elements; i++) {
1635 if (ldb_attr_cmp(ac->msg->elements[i].name, "description") == 0) {
1636 ac->msg->elements[i].flags |= LDB_FLAG_INTERNAL_FORCE_SINGLE_VALUE_CHECK;
1646 /* This trigger adapts the "servicePrincipalName" attributes if the
1647 * "dNSHostName" and/or "sAMAccountName" attribute change(s) */
1648 static int samldb_service_principal_names_change(struct samldb_ctx *ac)
1650 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1651 struct ldb_message_element *el = NULL, *el2 = NULL;
1652 struct ldb_message *msg;
1653 const char *attrs[] = { "servicePrincipalName", NULL };
1654 struct ldb_result *res;
1655 const char *dns_hostname = NULL, *old_dns_hostname = NULL,
1656 *sam_accountname = NULL, *old_sam_accountname = NULL;
1660 el = dsdb_get_single_valued_attr(ac->msg, "dNSHostName",
1661 ac->req->operation);
1662 el2 = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
1663 ac->req->operation);
1664 if ((el == NULL) && (el2 == NULL)) {
1665 /* we are not affected */
1669 /* Create a temporary message for fetching the "dNSHostName" */
1671 const char *dns_attrs[] = { "dNSHostName", NULL };
1672 msg = ldb_msg_new(ac->msg);
1674 return ldb_module_oom(ac->module);
1676 ret = ldb_msg_add(msg, el, 0);
1677 if (ret != LDB_SUCCESS) {
1680 dns_hostname = talloc_steal(ac,
1681 ldb_msg_find_attr_as_string(msg, "dNSHostName", NULL));
1684 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn,
1685 dns_attrs, DSDB_FLAG_NEXT_MODULE, ac->req);
1686 if (ret == LDB_SUCCESS) {
1687 old_dns_hostname = ldb_msg_find_attr_as_string(res->msgs[0], "dNSHostName", NULL);
1691 /* Create a temporary message for fetching the "sAMAccountName" */
1693 char *tempstr, *tempstr2;
1694 const char *acct_attrs[] = { "sAMAccountName", NULL };
1696 msg = ldb_msg_new(ac->msg);
1698 return ldb_module_oom(ac->module);
1700 ret = ldb_msg_add(msg, el2, 0);
1701 if (ret != LDB_SUCCESS) {
1704 tempstr = talloc_strdup(ac,
1705 ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL));
1708 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, acct_attrs,
1709 DSDB_FLAG_NEXT_MODULE, ac->req);
1710 if (ret == LDB_SUCCESS) {
1711 tempstr2 = talloc_strdup(ac,
1712 ldb_msg_find_attr_as_string(res->msgs[0],
1713 "sAMAccountName", NULL));
1717 /* The "sAMAccountName" needs some additional trimming: we need
1718 * to remove the trailing "$"s if they exist. */
1719 if ((tempstr != NULL) && (tempstr[0] != '\0') &&
1720 (tempstr[strlen(tempstr) - 1] == '$')) {
1721 tempstr[strlen(tempstr) - 1] = '\0';
1723 if ((tempstr2 != NULL) && (tempstr2[0] != '\0') &&
1724 (tempstr2[strlen(tempstr2) - 1] == '$')) {
1725 tempstr2[strlen(tempstr2) - 1] = '\0';
1727 sam_accountname = tempstr;
1728 old_sam_accountname = tempstr2;
1731 if (old_dns_hostname == NULL) {
1732 /* we cannot change when the old name is unknown */
1733 dns_hostname = NULL;
1735 if ((old_dns_hostname != NULL) && (dns_hostname != NULL) &&
1736 (strcasecmp(old_dns_hostname, dns_hostname) == 0)) {
1737 /* The "dNSHostName" didn't change */
1738 dns_hostname = NULL;
1741 if (old_sam_accountname == NULL) {
1742 /* we cannot change when the old name is unknown */
1743 sam_accountname = NULL;
1745 if ((old_sam_accountname != NULL) && (sam_accountname != NULL) &&
1746 (strcasecmp(old_sam_accountname, sam_accountname) == 0)) {
1747 /* The "sAMAccountName" didn't change */
1748 sam_accountname = NULL;
1751 if ((dns_hostname == NULL) && (sam_accountname == NULL)) {
1752 /* Well, there are information missing (old name(s)) or the
1753 * names didn't change. We've nothing to do and can exit here */
1757 /* Potential "servicePrincipalName" changes in the same request have to
1758 * be handled before the update (Windows behaviour). */
1759 el = ldb_msg_find_element(ac->msg, "servicePrincipalName");
1761 msg = ldb_msg_new(ac->msg);
1763 return ldb_module_oom(ac->module);
1765 msg->dn = ac->msg->dn;
1768 ret = ldb_msg_add(msg, el, el->flags);
1769 if (ret != LDB_SUCCESS) {
1773 ldb_msg_remove_element(ac->msg, el);
1775 el = ldb_msg_find_element(ac->msg,
1776 "servicePrincipalName");
1777 } while (el != NULL);
1779 ret = dsdb_module_modify(ac->module, msg,
1780 DSDB_FLAG_NEXT_MODULE, ac->req);
1781 if (ret != LDB_SUCCESS) {
1787 /* Fetch the "servicePrincipalName"s if any */
1788 ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
1789 DSDB_FLAG_NEXT_MODULE, ac->req, NULL);
1790 if (ret != LDB_SUCCESS) {
1793 if ((res->count != 1) || (res->msgs[0]->num_elements > 1)) {
1794 return ldb_operr(ldb);
1797 if (res->msgs[0]->num_elements == 1) {
1798 /* Yes, we do have "servicePrincipalName"s. First we update them
1799 * locally, that means we do always substitute the current
1800 * "dNSHostName" with the new one and/or "sAMAccountName"
1801 * without "$" with the new one and then we append this to the
1802 * modification request (Windows behaviour). */
1804 for (i = 0; i < res->msgs[0]->elements[0].num_values; i++) {
1805 char *old_str, *new_str, *pos;
1809 res->msgs[0]->elements[0].values[i].data;
1811 new_str = talloc_strdup(ac->msg,
1812 strtok_r(old_str, "/", &pos));
1813 if (new_str == NULL) {
1814 return ldb_module_oom(ac->module);
1817 while ((tok = strtok_r(NULL, "/", &pos)) != NULL) {
1818 if ((dns_hostname != NULL) &&
1819 (strcasecmp(tok, old_dns_hostname) == 0)) {
1822 if ((sam_accountname != NULL) &&
1823 (strcasecmp(tok, old_sam_accountname) == 0)) {
1824 tok = sam_accountname;
1827 new_str = talloc_asprintf(ac->msg, "%s/%s",
1829 if (new_str == NULL) {
1830 return ldb_module_oom(ac->module);
1834 ret = ldb_msg_add_string(ac->msg,
1835 "servicePrincipalName",
1837 if (ret != LDB_SUCCESS) {
1842 el = ldb_msg_find_element(ac->msg, "servicePrincipalName");
1843 el->flags = LDB_FLAG_MOD_REPLACE;
1853 static int samldb_add(struct ldb_module *module, struct ldb_request *req)
1855 struct ldb_context *ldb;
1856 struct samldb_ctx *ac;
1859 ldb = ldb_module_get_ctx(module);
1860 ldb_debug(ldb, LDB_DEBUG_TRACE, "samldb_add\n");
1862 /* do not manipulate our control entries */
1863 if (ldb_dn_is_special(req->op.add.message->dn)) {
1864 return ldb_next_request(module, req);
1867 ac = samldb_ctx_init(module, req);
1869 return ldb_operr(ldb);
1872 /* build the new msg */
1873 ac->msg = ldb_msg_copy_shallow(ac, req->op.add.message);
1874 if (ac->msg == NULL) {
1876 ldb_debug(ldb, LDB_DEBUG_FATAL,
1877 "samldb_add: ldb_msg_copy_shallow failed!\n");
1878 return ldb_operr(ldb);
1881 if (samdb_find_attribute(ldb, ac->msg,
1882 "objectclass", "user") != NULL) {
1885 ret = samldb_prim_group_trigger(ac);
1886 if (ret != LDB_SUCCESS) {
1890 ret = samldb_objectclass_trigger(ac);
1891 if (ret != LDB_SUCCESS) {
1895 return samldb_fill_object(ac);
1898 if (samdb_find_attribute(ldb, ac->msg,
1899 "objectclass", "group") != NULL) {
1902 ret = samldb_objectclass_trigger(ac);
1903 if (ret != LDB_SUCCESS) {
1907 return samldb_fill_object(ac);
1910 /* perhaps a foreignSecurityPrincipal? */
1911 if (samdb_find_attribute(ldb, ac->msg,
1913 "foreignSecurityPrincipal") != NULL) {
1914 return samldb_fill_foreignSecurityPrincipal_object(ac);
1917 if (samdb_find_attribute(ldb, ac->msg,
1918 "objectclass", "classSchema") != NULL) {
1919 ret = samldb_schema_info_update(ac);
1920 if (ret != LDB_SUCCESS) {
1925 ac->type = "classSchema";
1926 return samldb_fill_object(ac);
1929 if (samdb_find_attribute(ldb, ac->msg,
1930 "objectclass", "attributeSchema") != NULL) {
1931 ret = samldb_schema_info_update(ac);
1932 if (ret != LDB_SUCCESS) {
1937 ac->type = "attributeSchema";
1938 return samldb_fill_object(ac);
1943 /* nothing matched, go on */
1944 return ldb_next_request(module, req);
1948 static int samldb_modify(struct ldb_module *module, struct ldb_request *req)
1950 struct ldb_context *ldb;
1951 struct samldb_ctx *ac;
1952 struct ldb_message_element *el, *el2;
1953 bool modified = false;
1956 if (ldb_dn_is_special(req->op.mod.message->dn)) {
1957 /* do not manipulate our control entries */
1958 return ldb_next_request(module, req);
1961 ldb = ldb_module_get_ctx(module);
1963 /* make sure that "objectSid" is not specified */
1964 el = ldb_msg_find_element(req->op.mod.message, "objectSid");
1966 ldb_set_errstring(ldb,
1967 "samldb: objectSid must not be specified!");
1968 return LDB_ERR_UNWILLING_TO_PERFORM;
1970 /* make sure that "sAMAccountType" is not specified */
1971 el = ldb_msg_find_element(req->op.mod.message, "sAMAccountType");
1973 ldb_set_errstring(ldb,
1974 "samldb: sAMAccountType must not be specified!");
1975 return LDB_ERR_UNWILLING_TO_PERFORM;
1977 /* make sure that "isCriticalSystemObject" is not specified */
1978 el = ldb_msg_find_element(req->op.mod.message, "isCriticalSystemObject");
1980 if (ldb_request_get_control(req, LDB_CONTROL_RELAX_OID) == NULL) {
1981 ldb_set_errstring(ldb,
1982 "samldb: isCriticalSystemObject must not be specified!");
1983 return LDB_ERR_UNWILLING_TO_PERFORM;
1987 /* msDS-IntId is not allowed to be modified
1988 * except when modification comes from replication */
1989 if (ldb_msg_find_element(req->op.mod.message, "msDS-IntId")) {
1990 if (!ldb_request_get_control(req,
1991 DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
1992 return LDB_ERR_CONSTRAINT_VIOLATION;
1996 ac = samldb_ctx_init(module, req);
1998 return ldb_operr(ldb);
2001 /* build the new msg */
2002 ac->msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
2003 if (ac->msg == NULL) {
2005 ldb_debug(ldb, LDB_DEBUG_FATAL,
2006 "samldb_modify: ldb_msg_copy_shallow failed!\n");
2007 return ldb_operr(ldb);
2010 el = ldb_msg_find_element(ac->msg, "primaryGroupID");
2012 ret = samldb_prim_group_change(ac);
2013 if (ret != LDB_SUCCESS) {
2018 el = ldb_msg_find_element(ac->msg, "userAccountControl");
2021 ret = samldb_user_account_control_change(ac);
2022 if (ret != LDB_SUCCESS) {
2027 el = ldb_msg_find_element(ac->msg, "groupType");
2030 ret = samldb_group_type_change(ac);
2031 if (ret != LDB_SUCCESS) {
2036 el = ldb_msg_find_element(ac->msg, "sAMAccountName");
2038 ret = samldb_sam_accountname_check(ac);
2039 if (ret != LDB_SUCCESS) {
2044 el = ldb_msg_find_element(ac->msg, "member");
2046 ret = samldb_member_check(ac);
2047 if (ret != LDB_SUCCESS) {
2052 el = ldb_msg_find_element(ac->msg, "description");
2054 ret = samldb_description_check(ac, &modified);
2055 if (ret != LDB_SUCCESS) {
2060 el = ldb_msg_find_element(ac->msg, "dNSHostName");
2061 el2 = ldb_msg_find_element(ac->msg, "sAMAccountName");
2062 if ((el != NULL) || (el2 != NULL)) {
2064 ret = samldb_service_principal_names_change(ac);
2065 if (ret != LDB_SUCCESS) {
2071 struct ldb_request *child_req;
2073 /* Now perform the real modifications as a child request */
2074 ret = ldb_build_mod_req(&child_req, ldb, ac,
2077 req, dsdb_next_callback,
2079 LDB_REQ_SET_LOCATION(child_req);
2080 if (ret != LDB_SUCCESS) {
2084 return ldb_next_request(module, child_req);
2089 /* no change which interests us, go on */
2090 return ldb_next_request(module, req);
2095 static int samldb_prim_group_users_check(struct samldb_ctx *ac)
2097 struct ldb_context *ldb;
2098 struct dom_sid *sid;
2102 struct ldb_result *res;
2103 const char *attrs[] = { "objectSid", NULL };
2104 const char *noattrs[] = { NULL };
2106 ldb = ldb_module_get_ctx(ac->module);
2108 /* Finds out the SID/RID of the SAM object */
2109 ret = dsdb_module_search_dn(ac->module, ac, &res, ac->req->op.del.dn, attrs, DSDB_FLAG_NEXT_MODULE, ac->req);
2110 if (ret != LDB_SUCCESS) {
2114 sid = samdb_result_dom_sid(ac, res->msgs[0], "objectSid");
2116 /* No SID - it might not be a SAM object - therefore ok */
2119 status = dom_sid_split_rid(ac, sid, NULL, &rid);
2120 if (!NT_STATUS_IS_OK(status)) {
2121 return ldb_operr(ldb);
2124 /* Special object (security principal?) */
2128 /* Deny delete requests from groups which are primary ones */
2129 ret = dsdb_module_search(ac->module, ac, &res, NULL, LDB_SCOPE_SUBTREE, noattrs,
2130 DSDB_FLAG_NEXT_MODULE,
2132 "(&(primaryGroupID=%u)(objectClass=user))", rid);
2133 if (ret != LDB_SUCCESS) {
2136 if (res->count > 0) {
2137 return LDB_ERR_ENTRY_ALREADY_EXISTS;
2143 static int samldb_delete(struct ldb_module *module, struct ldb_request *req)
2145 struct samldb_ctx *ac;
2148 if (ldb_dn_is_special(req->op.del.dn)) {
2149 /* do not manipulate our control entries */
2150 return ldb_next_request(module, req);
2153 ac = samldb_ctx_init(module, req);
2155 return ldb_operr(ldb_module_get_ctx(module));
2158 ret = samldb_prim_group_users_check(ac);
2159 if (ret != LDB_SUCCESS) {
2165 return ldb_next_request(module, req);
2170 static int samldb_extended_allocate_rid_pool(struct ldb_module *module, struct ldb_request *req)
2172 struct ldb_context *ldb = ldb_module_get_ctx(module);
2173 struct dsdb_fsmo_extended_op *exop;
2176 exop = talloc_get_type(req->op.extended.data,
2177 struct dsdb_fsmo_extended_op);
2179 ldb_set_errstring(ldb,
2180 "samldb_extended_allocate_rid_pool: invalid extended data");
2181 return LDB_ERR_PROTOCOL_ERROR;
2184 ret = ridalloc_allocate_rid_pool_fsmo(module, exop, req);
2185 if (ret != LDB_SUCCESS) {
2189 return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
2192 static int samldb_extended(struct ldb_module *module, struct ldb_request *req)
2194 if (strcmp(req->op.extended.oid, DSDB_EXTENDED_ALLOCATE_RID_POOL) == 0) {
2195 return samldb_extended_allocate_rid_pool(module, req);
2198 return ldb_next_request(module, req);
2202 static const struct ldb_module_ops ldb_samldb_module_ops = {
2205 .modify = samldb_modify,
2206 .del = samldb_delete,
2207 .extended = samldb_extended
2211 int ldb_samldb_module_init(const char *version)
2213 LDB_MODULE_CHECK_VERSION(version);
2214 return ldb_register_module(&ldb_samldb_module_ops);