4 Copyright (C) Simo Sorce 2006-2008
5 Copyright (C) Nadezhda Ivanova 2009
6 Copyright (C) Anatoliy Atanasov 2009
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 ACL module
27 * Description: Module that performs authorisation access checks based on the
28 * account's security context and the DACL of the object being polled.
29 * Only DACL checks implemented at this point
31 * Authors: Nadezhda Ivanova, Anatoliy Atanasov
35 #include "ldb_module.h"
36 #include "auth/auth.h"
37 #include "libcli/security/security.h"
38 #include "dsdb/samdb/samdb.h"
39 #include "librpc/gen_ndr/ndr_security.h"
40 #include "param/param.h"
41 #include "dsdb/samdb/ldb_modules/util.h"
42 #include "lib/util/tsort.h"
44 struct extended_access_check_attribute {
46 const uint32_t requires_rights;
51 const char **password_attrs;
55 struct ldb_module *module;
56 struct ldb_request *req;
58 bool allowedAttributes;
59 bool allowedAttributesEffective;
60 bool allowedChildClasses;
61 bool allowedChildClassesEffective;
62 bool sDRightsEffective;
63 const char * const *attrs;
64 struct dsdb_schema *schema;
67 bool is_root_base_dn(struct ldb_context *ldb, struct ldb_dn *dn_to_check)
70 struct ldb_dn *root_base_dn = ldb_get_root_basedn(ldb);
71 result = ldb_dn_compare(root_base_dn,dn_to_check);
75 static struct security_token *acl_user_token(struct ldb_module *module)
77 struct ldb_context *ldb = ldb_module_get_ctx(module);
78 struct auth_session_info *session_info
79 = (struct auth_session_info *)ldb_get_opaque(ldb, "sessionInfo");
83 return session_info->security_token;
86 /* performs an access check from inside the module stack
87 * given the dn of the object to be checked, the required access
88 * guid is either the guid of the extended right, or NULL
91 int dsdb_module_check_access_on_dn(struct ldb_module *module,
95 const struct GUID *guid)
98 struct ldb_result *acl_res;
99 static const char *acl_attrs[] = {
100 "nTSecurityDescriptor",
104 struct ldb_context *ldb = ldb_module_get_ctx(module);
105 struct auth_session_info *session_info
106 = (struct auth_session_info *)ldb_get_opaque(ldb, "sessionInfo");
108 return LDB_ERR_OPERATIONS_ERROR;
110 ret = dsdb_module_search_dn(module, mem_ctx, &acl_res, dn,
111 acl_attrs, DSDB_SEARCH_SHOW_DELETED);
112 if (ret != LDB_SUCCESS) {
113 DEBUG(10,("access_check: failed to find object %s\n", ldb_dn_get_linearized(dn)));
116 return dsdb_check_access_on_dn_internal(acl_res,
118 session_info->security_token,
125 static int acl_module_init(struct ldb_module *module)
127 struct ldb_context *ldb;
128 struct acl_private *data;
130 TALLOC_CTX *mem_ctx = talloc_new(module);
131 static const char *attrs[] = { "passwordAttribute", NULL };
132 struct ldb_result *res;
133 struct ldb_message *msg;
134 struct ldb_message_element *password_attributes;
136 ldb = ldb_module_get_ctx(module);
138 ret = ldb_mod_register_control(module, LDB_CONTROL_SD_FLAGS_OID);
139 if (ret != LDB_SUCCESS) {
140 ldb_debug(ldb, LDB_DEBUG_ERROR,
141 "acl_module_init: Unable to register control with rootdse!\n");
142 return LDB_ERR_OPERATIONS_ERROR;
145 data = talloc(module, struct acl_private);
148 return LDB_ERR_OPERATIONS_ERROR;
151 data->password_attrs = NULL;
152 data->acl_perform = lp_parm_bool(ldb_get_opaque(ldb, "loadparm"),
153 NULL, "acl", "perform", false);
154 ldb_module_set_private(module, data);
158 return LDB_ERR_OPERATIONS_ERROR;
161 ret = dsdb_module_search_dn(module, mem_ctx, &res,
162 ldb_dn_new(mem_ctx, ldb, "@KLUDGEACL"),
164 if (ret != LDB_SUCCESS) {
167 if (res->count == 0) {
171 if (res->count > 1) {
172 talloc_free(mem_ctx);
173 return LDB_ERR_CONSTRAINT_VIOLATION;
178 password_attributes = ldb_msg_find_element(msg, "passwordAttribute");
179 if (!password_attributes) {
182 data->password_attrs = talloc_array(data, const char *, password_attributes->num_values + 1);
183 if (!data->password_attrs) {
184 talloc_free(mem_ctx);
186 return LDB_ERR_OPERATIONS_ERROR;
188 for (i=0; i < password_attributes->num_values; i++) {
189 data->password_attrs[i] = (const char *)password_attributes->values[i].data;
190 talloc_steal(data->password_attrs, password_attributes->values[i].data);
192 data->password_attrs[i] = NULL;
195 talloc_free(mem_ctx);
196 return ldb_next_init(module);
199 static const struct GUID *get_oc_guid_from_message(struct ldb_module *module,
200 const struct dsdb_schema *schema,
201 struct ldb_message *msg)
203 struct ldb_message_element *oc_el;
205 oc_el = ldb_msg_find_element(msg, "objectClass");
210 return class_schemaid_guid_by_lDAPDisplayName(schema,
211 (char *)oc_el->values[oc_el->num_values-1].data);
214 static int acl_check_access_on_attribute(struct ldb_module *module,
216 struct security_descriptor *sd,
217 struct dom_sid *rp_sid,
219 const struct dsdb_attribute *attr)
223 uint32_t access_granted;
224 struct object_tree *root = NULL;
225 struct object_tree *new_node = NULL;
226 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
227 struct security_token *token = acl_user_token(module);
229 if (!GUID_all_zero(&attr->attributeSecurityGUID)) {
230 if (!insert_in_object_tree(tmp_ctx,
231 &attr->attributeSecurityGUID, access,
233 DEBUG(10, ("acl_search: cannot add to object tree securityGUID\n"));
237 if (!insert_in_object_tree(tmp_ctx,
238 &attr->schemaIDGUID, access, &new_node, &new_node)) {
239 DEBUG(10, ("acl_search: cannot add to object tree attributeGUID\n"));
244 if (!insert_in_object_tree(tmp_ctx,
245 &attr->schemaIDGUID, access, &root, &new_node)) {
246 DEBUG(10, ("acl_search: cannot add to object tree attributeGUID\n"));
251 status = sec_access_check_ds(sd, token,
256 if (!NT_STATUS_IS_OK(status)) {
257 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
264 return LDB_ERR_OPERATIONS_ERROR;
267 static int acl_check_access_on_class(struct ldb_module *module,
268 const struct dsdb_schema *schema,
270 struct security_descriptor *sd,
271 struct dom_sid *rp_sid,
273 const char *class_name)
277 uint32_t access_granted;
278 struct object_tree *root = NULL;
279 struct object_tree *new_node = NULL;
280 const struct GUID *guid;
281 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
282 struct security_token *token = acl_user_token(module);
284 guid = class_schemaid_guid_by_lDAPDisplayName(schema, class_name);
286 DEBUG(10, ("acl_search: cannot find class %s\n",
290 if (!insert_in_object_tree(tmp_ctx,
293 DEBUG(10, ("acl_search: cannot add to object tree guid\n"));
297 status = sec_access_check_ds(sd, token,
302 if (!NT_STATUS_IS_OK(status)) {
303 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
310 return LDB_ERR_OPERATIONS_ERROR;
313 static int acl_allowedAttributes(struct ldb_module *module,
314 const struct dsdb_schema *schema,
315 struct ldb_message *sd_msg,
316 struct ldb_message *msg,
317 struct acl_context *ac)
319 struct ldb_message_element *oc_el;
320 struct ldb_context *ldb = ldb_module_get_ctx(module);
322 const char **attr_list;
325 /* If we don't have a schema yet, we can't do anything... */
326 if (schema == NULL) {
327 ldb_asprintf_errstring(ldb, "cannot add allowedAttributes to %s because no schema is loaded", ldb_dn_get_linearized(msg->dn));
328 return LDB_ERR_OPERATIONS_ERROR;
331 /* Must remove any existing attribute */
332 if (ac->allowedAttributes) {
333 ldb_msg_remove_attr(msg, "allowedAttributes");
336 mem_ctx = talloc_new(msg);
339 return LDB_ERR_OPERATIONS_ERROR;
342 oc_el = ldb_msg_find_element(sd_msg, "objectClass");
343 attr_list = dsdb_full_attribute_list(mem_ctx, schema, oc_el, DSDB_SCHEMA_ALL);
345 ldb_asprintf_errstring(ldb, "acl: Failed to get list of attributes");
346 talloc_free(mem_ctx);
347 return LDB_ERR_OPERATIONS_ERROR;
349 if (ac->allowedAttributes) {
350 for (i=0; attr_list && attr_list[i]; i++) {
351 ldb_msg_add_string(msg, "allowedAttributes", attr_list[i]);
354 if (ac->allowedAttributesEffective) {
355 struct security_descriptor *sd;
356 struct dom_sid *sid = NULL;
357 struct ldb_control *as_system = ldb_request_get_control(ac->req,
358 LDB_CONTROL_AS_SYSTEM_OID);
360 if (as_system != NULL) {
361 as_system->critical = 0;
364 ldb_msg_remove_attr(msg, "allowedAttributesEffective");
365 if (ac->am_system || as_system) {
366 for (i=0; attr_list && attr_list[i]; i++) {
367 ldb_msg_add_string(msg, "allowedAttributesEffective", attr_list[i]);
372 ret = dsdb_get_sd_from_ldb_message(mem_ctx, sd_msg, &sd);
374 if (ret != LDB_SUCCESS) {
377 ret = dsdb_get_dom_sid_from_ldb_message(mem_ctx, sd_msg, &sid);
379 if (ret != LDB_SUCCESS) {
382 for (i=0; attr_list && attr_list[i]; i++) {
383 const struct dsdb_attribute *attr = dsdb_attribute_by_lDAPDisplayName(schema,
386 return LDB_ERR_OPERATIONS_ERROR;
388 /* remove constructed attributes */
389 if (attr->systemFlags & DS_FLAG_ATTR_IS_CONSTRUCTED
391 || (attr->linkID != 0 && attr->linkID % 2 != 0 )) {
394 ret = acl_check_access_on_attribute(module,
400 if (ret == LDB_SUCCESS) {
401 ldb_msg_add_string(msg, "allowedAttributesEffective", attr_list[i]);
408 static int acl_childClasses(struct ldb_module *module,
409 const struct dsdb_schema *schema,
410 struct ldb_message *sd_msg,
411 struct ldb_message *msg,
412 const char *attrName)
414 struct ldb_message_element *oc_el;
415 struct ldb_message_element *allowedClasses;
416 const struct dsdb_class *sclass;
419 /* If we don't have a schema yet, we can't do anything... */
420 if (schema == NULL) {
421 ldb_asprintf_errstring(ldb_module_get_ctx(module), "cannot add childClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg->dn));
422 return LDB_ERR_OPERATIONS_ERROR;
425 /* Must remove any existing attribute, or else confusion reins */
426 ldb_msg_remove_attr(msg, attrName);
427 ret = ldb_msg_add_empty(msg, attrName, 0, &allowedClasses);
428 if (ret != LDB_SUCCESS) {
432 oc_el = ldb_msg_find_element(sd_msg, "objectClass");
434 for (i=0; oc_el && i < oc_el->num_values; i++) {
435 sclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &oc_el->values[i]);
437 /* We don't know this class? what is going on? */
441 for (j=0; sclass->possibleInferiors && sclass->possibleInferiors[j]; j++) {
442 ldb_msg_add_string(msg, attrName, sclass->possibleInferiors[j]);
445 if (allowedClasses->num_values > 1) {
446 TYPESAFE_QSORT(allowedClasses->values, allowedClasses->num_values, data_blob_cmp);
447 for (i=1 ; i < allowedClasses->num_values; i++) {
448 struct ldb_val *val1 = &allowedClasses->values[i-1];
449 struct ldb_val *val2 = &allowedClasses->values[i];
450 if (data_blob_cmp(val1, val2) == 0) {
451 memmove(val1, val2, (allowedClasses->num_values - i) * sizeof(struct ldb_val));
452 allowedClasses->num_values--;
461 static int acl_childClassesEffective(struct ldb_module *module,
462 const struct dsdb_schema *schema,
463 struct ldb_message *sd_msg,
464 struct ldb_message *msg,
465 struct acl_context *ac)
467 struct ldb_message_element *oc_el;
468 struct ldb_message_element *allowedClasses = NULL;
469 const struct dsdb_class *sclass;
470 struct security_descriptor *sd;
471 struct ldb_control *as_system = ldb_request_get_control(ac->req,
472 LDB_CONTROL_AS_SYSTEM_OID);
473 struct dom_sid *sid = NULL;
476 if (as_system != NULL) {
477 as_system->critical = 0;
480 if (ac->am_system || as_system) {
481 return acl_childClasses(module, schema, sd_msg, msg, "allowedChildClassesEffective");
484 /* If we don't have a schema yet, we can't do anything... */
485 if (schema == NULL) {
486 ldb_asprintf_errstring(ldb_module_get_ctx(module), "cannot add allowedChildClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg->dn));
487 return LDB_ERR_OPERATIONS_ERROR;
490 /* Must remove any existing attribute, or else confusion reins */
491 ldb_msg_remove_attr(msg, "allowedChildClassesEffective");
493 oc_el = ldb_msg_find_element(sd_msg, "objectClass");
494 ret = dsdb_get_sd_from_ldb_message(msg, sd_msg, &sd);
495 if (ret != LDB_SUCCESS) {
498 ret = dsdb_get_dom_sid_from_ldb_message(msg, sd_msg, &sid);
500 if (ret != LDB_SUCCESS) {
503 for (i=0; oc_el && i < oc_el->num_values; i++) {
504 sclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &oc_el->values[i]);
506 /* We don't know this class? what is going on? */
510 for (j=0; sclass->possibleInferiors && sclass->possibleInferiors[j]; j++) {
511 ret = acl_check_access_on_class(module,
516 SEC_ADS_CREATE_CHILD,
517 sclass->possibleInferiors[j]);
518 if (ret == LDB_SUCCESS) {
519 ldb_msg_add_string(msg, "allowedChildClassesEffective",
520 sclass->possibleInferiors[j]);
524 allowedClasses = ldb_msg_find_element(msg, "allowedChildClassesEffective");
525 if (!allowedClasses) {
529 if (allowedClasses->num_values > 1) {
530 TYPESAFE_QSORT(allowedClasses->values, allowedClasses->num_values, data_blob_cmp);
531 for (i=1 ; i < allowedClasses->num_values; i++) {
532 struct ldb_val *val1 = &allowedClasses->values[i-1];
533 struct ldb_val *val2 = &allowedClasses->values[i];
534 if (data_blob_cmp(val1, val2) == 0) {
535 memmove(val1, val2, (allowedClasses->num_values - i) * sizeof( struct ldb_val));
536 allowedClasses->num_values--;
544 static int acl_sDRightsEffective(struct ldb_module *module,
545 struct ldb_message *sd_msg,
546 struct ldb_message *msg,
547 struct acl_context *ac)
549 struct ldb_message_element *rightsEffective;
551 struct security_descriptor *sd;
552 struct ldb_control *as_system = ldb_request_get_control(ac->req,
553 LDB_CONTROL_AS_SYSTEM_OID);
554 struct dom_sid *sid = NULL;
557 if (as_system != NULL) {
558 as_system->critical = 0;
561 /* Must remove any existing attribute, or else confusion reins */
562 ldb_msg_remove_attr(msg, "sDRightsEffective");
563 ret = ldb_msg_add_empty(msg, "sDRightsEffective", 0, &rightsEffective);
564 if (ret != LDB_SUCCESS) {
567 if (ac->am_system || as_system) {
568 flags = SECINFO_OWNER | SECINFO_GROUP | SECINFO_SACL | SECINFO_DACL;
571 /* Get the security descriptor from the message */
572 ret = dsdb_get_sd_from_ldb_message(msg, sd_msg, &sd);
573 if (ret != LDB_SUCCESS) {
576 ret = dsdb_get_dom_sid_from_ldb_message(msg, sd_msg, &sid);
578 if (ret != LDB_SUCCESS) {
581 ret = acl_check_access_on_attribute(module,
587 if (ret == LDB_SUCCESS) {
588 flags |= SECINFO_OWNER | SECINFO_GROUP;
590 ret = acl_check_access_on_attribute(module,
596 if (ret == LDB_SUCCESS) {
597 flags |= SECINFO_DACL;
599 ret = acl_check_access_on_attribute(module,
603 SEC_FLAG_SYSTEM_SECURITY,
605 if (ret == LDB_SUCCESS) {
606 flags |= SECINFO_SACL;
609 ldb_msg_add_fmt(msg, "sDRightsEffective", "%u", flags);
613 static int acl_add(struct ldb_module *module, struct ldb_request *req)
616 struct ldb_dn *parent = ldb_dn_get_parent(req, req->op.add.message->dn);
617 struct ldb_context *ldb;
618 const struct dsdb_schema *schema;
619 struct ldb_message_element *oc_el;
620 const struct GUID *guid;
621 struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
623 if (as_system != NULL) {
624 as_system->critical = 0;
627 if (dsdb_module_am_system(module) || as_system) {
628 return ldb_next_request(module, req);
631 if (ldb_dn_is_special(req->op.add.message->dn)) {
632 return ldb_next_request(module, req);
634 ldb = ldb_module_get_ctx(module);
635 /* Creating an NC. There is probably something we should do here,
636 * but we will establish that later */
637 /* FIXME: this has to be made dynamic at some point */
638 if ((ldb_dn_compare(req->op.add.message->dn, (ldb_get_schema_basedn(ldb))) == 0) ||
639 (ldb_dn_compare(req->op.add.message->dn, (ldb_get_config_basedn(ldb))) == 0) ||
640 (ldb_dn_compare(req->op.add.message->dn, (ldb_get_default_basedn(ldb))) == 0) ||
641 (ldb_dn_compare(req->op.add.message->dn, (ldb_get_root_basedn(ldb))) == 0)) {
642 return ldb_next_request(module, req);
645 schema = dsdb_get_schema(ldb, req);
647 return LDB_ERR_OPERATIONS_ERROR;
650 oc_el = ldb_msg_find_element(req->op.add.message, "objectClass");
651 if (!oc_el || oc_el->num_values == 0) {
652 DEBUG(10,("acl:operation error %s\n", ldb_dn_get_linearized(req->op.add.message->dn)));
653 return ldb_module_done(req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
656 guid = class_schemaid_guid_by_lDAPDisplayName(schema,
657 (char *)oc_el->values[oc_el->num_values-1].data);
658 ret = dsdb_module_check_access_on_dn(module, req, parent, SEC_ADS_CREATE_CHILD, guid);
659 if (ret != LDB_SUCCESS) {
662 return ldb_next_request(module, req);
665 static int acl_modify(struct ldb_module *module, struct ldb_request *req)
668 struct ldb_context *ldb = ldb_module_get_ctx(module);
669 const struct dsdb_schema *schema;
671 bool modify_sd = false;
672 const struct GUID *guid;
673 uint32_t access_granted;
674 struct object_tree *root = NULL;
675 struct object_tree *new_node = NULL;
677 struct ldb_result *acl_res;
678 struct security_descriptor *sd;
679 struct dom_sid *sid = NULL;
680 struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
681 TALLOC_CTX *tmp_ctx = talloc_new(req);
682 static const char *acl_attrs[] = {
683 "nTSecurityDescriptor",
689 if (as_system != NULL) {
690 as_system->critical = 0;
693 /* Don't print this debug statement if elements[0].name is going to be NULL */
694 if(req->op.mod.message->num_elements > 0)
696 DEBUG(10, ("ldb:acl_modify: %s\n", req->op.mod.message->elements[0].name));
698 if (dsdb_module_am_system(module) || as_system) {
699 return ldb_next_request(module, req);
701 if (ldb_dn_is_special(req->op.mod.message->dn)) {
702 return ldb_next_request(module, req);
704 ret = dsdb_module_search_dn(module, req, &acl_res, req->op.mod.message->dn,
707 if (ret != LDB_SUCCESS) {
711 schema = dsdb_get_schema(ldb, acl_res);
713 talloc_free(acl_res);
714 return LDB_ERR_OPERATIONS_ERROR;
717 ret = dsdb_get_sd_from_ldb_message(req, acl_res->msgs[0], &sd);
718 if (ret != LDB_SUCCESS) {
719 DEBUG(10, ("acl_modify: cannot get descriptor\n"));
722 /* Theoretically we pass the check if the object has no sd */
727 guid = get_oc_guid_from_message(module, schema, acl_res->msgs[0]);
729 DEBUG(10, ("acl_modify: cannot get guid\n"));
733 ret = dsdb_get_dom_sid_from_ldb_message(req, acl_res->msgs[0], &sid);
734 if (ret != LDB_SUCCESS) {
735 return LDB_ERR_OPERATIONS_ERROR;
738 if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
740 DEBUG(10, ("acl_modify: cannot add to object tree\n"));
743 for (i=0; i < req->op.mod.message->num_elements; i++){
744 const struct dsdb_attribute *attr;
745 /* clearTextPassword is not in schema */
746 if (strcmp("clearTextPassword", req->op.mod.message->elements[i].name) == 0) {
747 attr = dsdb_attribute_by_lDAPDisplayName(schema, "unicodePwd");
749 attr = dsdb_attribute_by_lDAPDisplayName(schema,
750 req->op.mod.message->elements[i].name);
752 if (strcmp("nTSecurityDescriptor", req->op.mod.message->elements[i].name) == 0) {
757 DEBUG(10, ("acl_modify: cannot find attribute %s\n",
758 req->op.mod.message->elements[i].name));
761 if (!insert_in_object_tree(tmp_ctx,
762 &attr->attributeSecurityGUID, SEC_ADS_WRITE_PROP,
763 &new_node, &new_node)) {
764 DEBUG(10, ("acl_modify: cannot add to object tree securityGUID\n"));
768 if (!insert_in_object_tree(tmp_ctx,
769 &attr->schemaIDGUID, SEC_ADS_WRITE_PROP, &new_node, &new_node)) {
770 DEBUG(10, ("acl_modify: cannot add to object tree attributeGUID\n"));
776 if (root->num_of_children > 0) {
777 status = sec_access_check_ds(sd, acl_user_token(module),
783 if (!NT_STATUS_IS_OK(status)) {
784 DEBUG(10, ("Object %s nas no write property access\n",
785 ldb_dn_get_linearized(req->op.mod.message->dn)));
787 acl_user_token(module),
788 req->op.mod.message->dn,
791 talloc_free(tmp_ctx);
792 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
796 status = sec_access_check_ds(sd, acl_user_token(module),
802 if (!NT_STATUS_IS_OK(status)) {
803 DEBUG(10, ("Object %s nas no write dacl access\n",
804 ldb_dn_get_linearized(req->op.mod.message->dn)));
806 acl_user_token(module),
807 req->op.mod.message->dn,
810 talloc_free(tmp_ctx);
811 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
815 talloc_free(tmp_ctx);
816 return ldb_next_request(module, req);
818 talloc_free(tmp_ctx);
819 return LDB_ERR_OPERATIONS_ERROR;
822 /* similar to the modify for the time being.
823 * We need to concider the special delete tree case, though - TODO */
824 static int acl_delete(struct ldb_module *module, struct ldb_request *req)
827 struct ldb_dn *parent = ldb_dn_get_parent(req, req->op.del.dn);
828 struct ldb_context *ldb;
829 struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
831 if (as_system != NULL) {
832 as_system->critical = 0;
835 DEBUG(10, ("ldb:acl_delete: %s\n", ldb_dn_get_linearized(req->op.del.dn)));
836 if (dsdb_module_am_system(module) || as_system) {
837 return ldb_next_request(module, req);
840 if (ldb_dn_is_special(req->op.del.dn)) {
841 return ldb_next_request(module, req);
843 ldb = ldb_module_get_ctx(module);
844 /* first check if we have delete object right */
845 ret = dsdb_module_check_access_on_dn(module, req, req->op.del.dn, SEC_STD_DELETE, NULL);
846 if (ret == LDB_SUCCESS) {
847 return ldb_next_request(module, req);
850 /* Nope, we don't have delete object. Lets check if we have delete child on the parent */
851 /* No parent, so check fails */
852 /* FIXME: this has to be made dynamic at some point */
853 if ((ldb_dn_compare(req->op.del.dn, (ldb_get_schema_basedn(ldb))) == 0) ||
854 (ldb_dn_compare(req->op.del.dn, (ldb_get_config_basedn(ldb))) == 0) ||
855 (ldb_dn_compare(req->op.del.dn, (ldb_get_default_basedn(ldb))) == 0) ||
856 (ldb_dn_compare(req->op.del.dn, (ldb_get_root_basedn(ldb))) == 0)) {
857 DEBUG(10,("acl:deleting an NC\n"));
858 return ldb_module_done(req, NULL, NULL, LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS);
861 ret = dsdb_module_check_access_on_dn(module, req, parent, SEC_ADS_DELETE_CHILD, NULL);
862 if (ret != LDB_SUCCESS) {
865 return ldb_next_request(module, req);
868 static int acl_rename(struct ldb_module *module, struct ldb_request *req)
871 struct ldb_dn *oldparent = ldb_dn_get_parent(req, req->op.rename.olddn);
872 struct ldb_dn *newparent = ldb_dn_get_parent(req, req->op.rename.newdn);
873 const struct dsdb_schema *schema;
874 struct ldb_context *ldb;
875 struct security_descriptor *sd = NULL;
876 struct dom_sid *sid = NULL;
877 struct ldb_result *acl_res;
878 const struct GUID *guid;
879 struct object_tree *root = NULL;
880 struct object_tree *new_node = NULL;
881 struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
882 TALLOC_CTX *tmp_ctx = talloc_new(req);
884 uint32_t access_granted;
885 const char *rdn_name;
886 static const char *acl_attrs[] = {
887 "nTSecurityDescriptor",
893 if (as_system != NULL) {
894 as_system->critical = 0;
897 DEBUG(10, ("ldb:acl_rename: %s\n", ldb_dn_get_linearized(req->op.rename.olddn)));
898 if (dsdb_module_am_system(module) || as_system) {
899 return ldb_next_request(module, req);
901 if (ldb_dn_is_special(req->op.rename.olddn)) {
902 return ldb_next_request(module, req);
904 ldb = ldb_module_get_ctx(module);
906 ret = dsdb_module_search_dn(module, req, &acl_res, req->op.rename.olddn,
907 acl_attrs, DSDB_SEARCH_SHOW_DELETED);
908 /* we sould be able to find the parent */
909 if (ret != LDB_SUCCESS) {
910 DEBUG(10,("acl: failed to find object %s\n",
911 ldb_dn_get_linearized(req->op.rename.olddn)));
915 schema = dsdb_get_schema(ldb, acl_res);
917 talloc_free(acl_res);
918 return LDB_ERR_OPERATIONS_ERROR;
921 guid = get_oc_guid_from_message(module, schema, acl_res->msgs[0]);
922 if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
924 return LDB_ERR_OPERATIONS_ERROR;
927 guid = attribute_schemaid_guid_by_lDAPDisplayName(schema,
929 if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
930 &new_node, &new_node)) {
931 return LDB_ERR_OPERATIONS_ERROR;
934 rdn_name = ldb_dn_get_rdn_name(req->op.rename.olddn);
935 if (rdn_name == NULL) {
936 return LDB_ERR_OPERATIONS_ERROR;
938 guid = attribute_schemaid_guid_by_lDAPDisplayName(schema,
940 if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
941 &new_node, &new_node)) {
942 return LDB_ERR_OPERATIONS_ERROR;
945 ret = dsdb_get_sd_from_ldb_message(req, acl_res->msgs[0], &sd);
947 if (ret != LDB_SUCCESS) {
948 return LDB_ERR_OPERATIONS_ERROR;
950 /* Theoretically we pass the check if the object has no sd */
954 ret = dsdb_get_dom_sid_from_ldb_message(req, acl_res->msgs[0], &sid);
955 if (ret != LDB_SUCCESS) {
956 return LDB_ERR_OPERATIONS_ERROR;
959 status = sec_access_check_ds(sd, acl_user_token(module),
965 if (!NT_STATUS_IS_OK(status)) {
966 DEBUG(10, ("Object %s nas no wp on name\n",
967 ldb_dn_get_linearized(req->op.rename.olddn)));
969 acl_user_token(module),
970 req->op.rename.olddn,
973 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
976 if (ldb_dn_compare(oldparent, newparent) == 0) {
977 /* regular rename, not move, nothing more to do */
978 return ldb_next_request(module, req);
981 /* What exactly to do in this case? It would fail anyway.. */
982 /* FIXME: this has to be made dynamic at some point */
983 if ((ldb_dn_compare(req->op.rename.newdn, (ldb_get_schema_basedn(ldb))) == 0) ||
984 (ldb_dn_compare(req->op.rename.newdn, (ldb_get_config_basedn(ldb))) == 0) ||
985 (ldb_dn_compare(req->op.rename.newdn, (ldb_get_default_basedn(ldb))) == 0) ||
986 (ldb_dn_compare(req->op.rename.newdn, (ldb_get_root_basedn(ldb))) == 0)) {
987 DEBUG(10,("acl:moving as an NC\n"));
988 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
990 /* new parent should have create child */
991 talloc_free(tmp_ctx);
992 tmp_ctx = talloc_new(req);
995 guid = get_oc_guid_from_message(module, schema, acl_res->msgs[0]);
997 DEBUG(10,("acl:renamed object has no object class\n"));
998 return ldb_module_done(req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
1001 ret = dsdb_module_check_access_on_dn(module, req, newparent, SEC_ADS_CREATE_CHILD, guid);
1002 if (ret != LDB_SUCCESS) {
1003 DEBUG(10,("acl:access_denied renaming %s", ldb_dn_get_linearized(req->op.rename.olddn)));
1006 /* do we have delete object on the object? */
1008 status = sec_access_check_ds(sd, acl_user_token(module),
1014 if (NT_STATUS_IS_OK(status)) {
1015 return ldb_next_request(module, req);
1017 /* what about delete child on the current parent */
1018 ret = dsdb_module_check_access_on_dn(module, req, oldparent, SEC_ADS_DELETE_CHILD, NULL);
1019 if (ret != LDB_SUCCESS) {
1020 DEBUG(10,("acl:access_denied renaming %s", ldb_dn_get_linearized(req->op.rename.olddn)));
1021 return ldb_module_done(req, NULL, NULL, ret);
1023 return ldb_next_request(module, req);
1026 static int acl_search_callback(struct ldb_request *req, struct ldb_reply *ares)
1028 struct ldb_context *ldb;
1029 struct acl_context *ac;
1030 struct acl_private *data;
1031 struct ldb_result *acl_res;
1032 static const char *acl_attrs[] = {
1034 "nTSecurityDescriptor",
1040 ac = talloc_get_type(req->context, struct acl_context);
1041 data = talloc_get_type(ldb_module_get_private(ac->module), struct acl_private);
1042 ldb = ldb_module_get_ctx(ac->module);
1045 return ldb_module_done(ac->req, NULL, NULL,
1046 LDB_ERR_OPERATIONS_ERROR);
1048 if (ares->error != LDB_SUCCESS) {
1049 return ldb_module_done(ac->req, ares->controls,
1050 ares->response, ares->error);
1053 switch (ares->type) {
1054 case LDB_REPLY_ENTRY:
1055 if (ac->allowedAttributes
1056 || ac->allowedChildClasses
1057 || ac->allowedChildClassesEffective
1058 || ac->allowedAttributesEffective
1059 || ac->sDRightsEffective) {
1060 ret = dsdb_module_search_dn(ac->module, ac, &acl_res, ares->message->dn,
1062 if (ret != LDB_SUCCESS) {
1063 return ldb_module_done(ac->req, NULL, NULL, ret);
1065 if (ac->allowedAttributes || ac->allowedAttributesEffective) {
1066 ret = acl_allowedAttributes(ac->module, ac->schema, acl_res->msgs[0], ares->message, ac);
1067 if (ret != LDB_SUCCESS) {
1068 return ldb_module_done(ac->req, NULL, NULL, ret);
1071 if (ac->allowedChildClasses) {
1072 ret = acl_childClasses(ac->module, ac->schema, acl_res->msgs[0],
1073 ares->message, "allowedChildClasses");
1074 if (ret != LDB_SUCCESS) {
1075 return ldb_module_done(ac->req, NULL, NULL, ret);
1078 if (ac->allowedChildClassesEffective) {
1079 ret = acl_childClassesEffective(ac->module, ac->schema,
1080 acl_res->msgs[0], ares->message, ac);
1081 if (ret != LDB_SUCCESS) {
1082 return ldb_module_done(ac->req, NULL, NULL, ret);
1085 if (ac->sDRightsEffective) {
1086 ret = acl_sDRightsEffective(ac->module,
1087 acl_res->msgs[0], ares->message, ac);
1088 if (ret != LDB_SUCCESS) {
1089 return ldb_module_done(ac->req, NULL, NULL, ret);
1093 if (data && data->password_attrs) {
1094 if (!ac->am_system) {
1095 for (i = 0; data->password_attrs[i]; i++) {
1096 ldb_msg_remove_attr(ares->message, data->password_attrs[i]);
1100 return ldb_module_send_entry(ac->req, ares->message, ares->controls);
1102 case LDB_REPLY_REFERRAL:
1103 return ldb_module_send_referral(ac->req, ares->referral);
1105 case LDB_REPLY_DONE:
1106 return ldb_module_done(ac->req, ares->controls,
1107 ares->response, LDB_SUCCESS);
1113 static int acl_search(struct ldb_module *module, struct ldb_request *req)
1115 struct ldb_context *ldb;
1116 struct acl_context *ac;
1117 struct ldb_request *down_req;
1118 struct acl_private *data;
1121 ldb = ldb_module_get_ctx(module);
1123 ac = talloc_zero(req, struct acl_context);
1126 return LDB_ERR_OPERATIONS_ERROR;
1128 data = talloc_get_type(ldb_module_get_private(module), struct acl_private);
1130 ac->module = module;
1132 ac->am_system = dsdb_module_am_system(module);
1133 ac->allowedAttributes = ldb_attr_in_list(req->op.search.attrs, "allowedAttributes");
1134 ac->allowedAttributesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedAttributesEffective");
1135 ac->allowedChildClasses = ldb_attr_in_list(req->op.search.attrs, "allowedChildClasses");
1136 ac->allowedChildClassesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedChildClassesEffective");
1137 ac->sDRightsEffective = ldb_attr_in_list(req->op.search.attrs, "sDRightsEffective");
1138 ac->schema = dsdb_get_schema(ldb, ac);
1140 /* replace any attributes in the parse tree that are private,
1141 so we don't allow a search for 'userPassword=penguin',
1142 just as we would not allow that attribute to be returned */
1143 if (ac->am_system) {
1144 /* FIXME: We should copy the tree and keep the original unmodified. */
1145 /* remove password attributes */
1146 if (data && data->password_attrs) {
1147 for (i = 0; data->password_attrs[i]; i++) {
1148 ldb_parse_tree_attr_replace(req->op.search.tree,
1149 data->password_attrs[i],
1150 "kludgeACLredactedattribute");
1154 ret = ldb_build_search_req_ex(&down_req,
1156 req->op.search.base,
1157 req->op.search.scope,
1158 req->op.search.tree,
1159 req->op.search.attrs,
1161 ac, acl_search_callback,
1163 if (ret != LDB_SUCCESS) {
1166 /* perform the search */
1167 return ldb_next_request(module, down_req);
1170 _PUBLIC_ const struct ldb_module_ops ldb_acl_module_ops = {
1172 .search = acl_search,
1174 .modify = acl_modify,
1176 .rename = acl_rename,
1177 .init_context = acl_module_init