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"
43 #include "system/kerberos.h"
44 #include "auth/kerberos/kerberos.h"
46 struct extended_access_check_attribute {
48 const uint32_t requires_rights;
53 const char **password_attrs;
54 void *cached_schema_ptr;
55 uint64_t cached_schema_metadata_usn;
56 uint64_t cached_schema_loaded_usn;
57 const char **confidential_attrs;
61 struct ldb_module *module;
62 struct ldb_request *req;
64 bool am_administrator;
66 bool constructed_attrs;
67 bool allowedAttributes;
68 bool allowedAttributesEffective;
69 bool allowedChildClasses;
70 bool allowedChildClassesEffective;
71 bool sDRightsEffective;
73 const char * const *attrs;
74 struct dsdb_schema *schema;
77 static int acl_module_init(struct ldb_module *module)
79 struct ldb_context *ldb;
80 struct acl_private *data;
84 static const char * const attrs[] = { "passwordAttribute", NULL };
85 static const char * const secret_attrs[] = {
86 DSDB_SECRET_ATTRIBUTES
88 struct ldb_result *res;
89 struct ldb_message *msg;
90 struct ldb_message_element *password_attributes;
92 ldb = ldb_module_get_ctx(module);
94 ret = ldb_mod_register_control(module, LDB_CONTROL_SD_FLAGS_OID);
95 if (ret != LDB_SUCCESS) {
96 ldb_debug(ldb, LDB_DEBUG_ERROR,
97 "acl_module_init: Unable to register control with rootdse!\n");
98 return ldb_operr(ldb);
101 data = talloc_zero(module, struct acl_private);
106 data->acl_search = lpcfg_parm_bool(ldb_get_opaque(ldb, "loadparm"),
107 NULL, "acl", "search", true);
108 ldb_module_set_private(module, data);
110 mem_ctx = talloc_new(module);
115 ret = dsdb_module_search_dn(module, mem_ctx, &res,
116 ldb_dn_new(mem_ctx, ldb, "@KLUDGEACL"),
118 DSDB_FLAG_NEXT_MODULE |
121 if (ret != LDB_SUCCESS) {
124 if (res->count == 0) {
128 if (res->count > 1) {
129 talloc_free(mem_ctx);
130 return LDB_ERR_CONSTRAINT_VIOLATION;
135 password_attributes = ldb_msg_find_element(msg, "passwordAttribute");
136 if (!password_attributes) {
139 data->password_attrs = talloc_array(data, const char *,
140 password_attributes->num_values +
141 ARRAY_SIZE(secret_attrs) + 1);
142 if (!data->password_attrs) {
143 talloc_free(mem_ctx);
148 for (i=0; i < password_attributes->num_values; i++) {
149 data->password_attrs[n] = (const char *)password_attributes->values[i].data;
150 talloc_steal(data->password_attrs, password_attributes->values[i].data);
154 for (i=0; i < ARRAY_SIZE(secret_attrs); i++) {
157 for (j=0; j < n; j++) {
158 if (strcasecmp(data->password_attrs[j], secret_attrs[i]) == 0) {
168 data->password_attrs[n] = talloc_strdup(data->password_attrs,
170 if (data->password_attrs[n] == NULL) {
171 talloc_free(mem_ctx);
176 data->password_attrs[n] = NULL;
179 talloc_free(mem_ctx);
180 return ldb_next_init(module);
183 static int acl_allowedAttributes(struct ldb_module *module,
184 const struct dsdb_schema *schema,
185 struct ldb_message *sd_msg,
186 struct ldb_message *msg,
187 struct acl_context *ac)
189 struct ldb_message_element *oc_el;
190 struct ldb_context *ldb = ldb_module_get_ctx(module);
192 const char **attr_list;
195 /* If we don't have a schema yet, we can't do anything... */
196 if (schema == NULL) {
197 ldb_asprintf_errstring(ldb, "cannot add allowedAttributes to %s because no schema is loaded", ldb_dn_get_linearized(msg->dn));
198 return LDB_ERR_OPERATIONS_ERROR;
201 /* Must remove any existing attribute */
202 if (ac->allowedAttributes) {
203 ldb_msg_remove_attr(msg, "allowedAttributes");
206 mem_ctx = talloc_new(msg);
211 oc_el = ldb_msg_find_element(sd_msg, "objectClass");
212 attr_list = dsdb_full_attribute_list(mem_ctx, schema, oc_el, DSDB_SCHEMA_ALL);
214 ldb_asprintf_errstring(ldb, "acl: Failed to get list of attributes");
215 talloc_free(mem_ctx);
216 return LDB_ERR_OPERATIONS_ERROR;
218 if (ac->allowedAttributes) {
219 for (i=0; attr_list && attr_list[i]; i++) {
220 ldb_msg_add_string(msg, "allowedAttributes", attr_list[i]);
223 if (ac->allowedAttributesEffective) {
224 struct security_descriptor *sd;
225 struct dom_sid *sid = NULL;
226 struct ldb_control *as_system = ldb_request_get_control(ac->req,
227 LDB_CONTROL_AS_SYSTEM_OID);
229 if (as_system != NULL) {
230 as_system->critical = 0;
233 ldb_msg_remove_attr(msg, "allowedAttributesEffective");
234 if (ac->am_system || as_system) {
235 for (i=0; attr_list && attr_list[i]; i++) {
236 ldb_msg_add_string(msg, "allowedAttributesEffective", attr_list[i]);
241 ret = dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module), mem_ctx, sd_msg, &sd);
243 if (ret != LDB_SUCCESS) {
247 sid = samdb_result_dom_sid(mem_ctx, sd_msg, "objectSid");
248 for (i=0; attr_list && attr_list[i]; i++) {
249 const struct dsdb_attribute *attr = dsdb_attribute_by_lDAPDisplayName(schema,
252 return ldb_operr(ldb);
254 /* remove constructed attributes */
255 if (attr->systemFlags & DS_FLAG_ATTR_IS_CONSTRUCTED
257 || (attr->linkID != 0 && attr->linkID % 2 != 0 )) {
260 ret = acl_check_access_on_attribute(module,
266 if (ret == LDB_SUCCESS) {
267 ldb_msg_add_string(msg, "allowedAttributesEffective", attr_list[i]);
274 static int acl_childClasses(struct ldb_module *module,
275 const struct dsdb_schema *schema,
276 struct ldb_message *sd_msg,
277 struct ldb_message *msg,
278 const char *attrName)
280 struct ldb_message_element *oc_el;
281 struct ldb_message_element *allowedClasses;
282 const struct dsdb_class *sclass;
286 /* If we don't have a schema yet, we can't do anything... */
287 if (schema == NULL) {
288 ldb_asprintf_errstring(ldb_module_get_ctx(module), "cannot add childClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg->dn));
289 return LDB_ERR_OPERATIONS_ERROR;
292 /* Must remove any existing attribute, or else confusion reins */
293 ldb_msg_remove_attr(msg, attrName);
294 ret = ldb_msg_add_empty(msg, attrName, 0, &allowedClasses);
295 if (ret != LDB_SUCCESS) {
299 oc_el = ldb_msg_find_element(sd_msg, "objectClass");
301 for (i=0; oc_el && i < oc_el->num_values; i++) {
302 sclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &oc_el->values[i]);
304 /* We don't know this class? what is going on? */
308 for (j=0; sclass->possibleInferiors && sclass->possibleInferiors[j]; j++) {
309 ldb_msg_add_string(msg, attrName, sclass->possibleInferiors[j]);
312 if (allowedClasses->num_values > 1) {
313 TYPESAFE_QSORT(allowedClasses->values, allowedClasses->num_values, data_blob_cmp);
314 for (i=1 ; i < allowedClasses->num_values; i++) {
315 struct ldb_val *val1 = &allowedClasses->values[i-1];
316 struct ldb_val *val2 = &allowedClasses->values[i];
317 if (data_blob_cmp(val1, val2) == 0) {
318 memmove(val1, val2, (allowedClasses->num_values - i) * sizeof(struct ldb_val));
319 allowedClasses->num_values--;
328 static int acl_check_access_on_class(struct ldb_module *module,
329 const struct dsdb_schema *schema,
331 struct security_descriptor *sd,
332 struct security_token *token,
333 struct dom_sid *rp_sid,
334 uint32_t access_mask,
335 const char *class_name)
339 uint32_t access_granted;
340 struct object_tree *root = NULL;
341 struct object_tree *new_node = NULL;
342 const struct GUID *guid;
344 if (class_name != NULL) {
345 guid = class_schemaid_guid_by_lDAPDisplayName(schema, class_name);
347 DEBUG(10, ("acl_search: cannot find class %s\n",
351 if (!insert_in_object_tree(mem_ctx,
354 DEBUG(10, ("acl_search: cannot add to object tree guid\n"));
359 status = sec_access_check_ds(sd, token,
364 if (!NT_STATUS_IS_OK(status)) {
365 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
371 return ldb_operr(ldb_module_get_ctx(module));
374 static int acl_childClassesEffective(struct ldb_module *module,
375 const struct dsdb_schema *schema,
376 struct ldb_message *sd_msg,
377 struct ldb_message *msg,
378 struct acl_context *ac)
380 struct ldb_message_element *oc_el;
381 struct ldb_message_element *allowedClasses = NULL;
382 const struct dsdb_class *sclass;
383 struct security_descriptor *sd;
384 struct ldb_control *as_system = ldb_request_get_control(ac->req,
385 LDB_CONTROL_AS_SYSTEM_OID);
386 struct dom_sid *sid = NULL;
390 if (as_system != NULL) {
391 as_system->critical = 0;
394 if (ac->am_system || as_system) {
395 return acl_childClasses(module, schema, sd_msg, msg, "allowedChildClassesEffective");
398 /* If we don't have a schema yet, we can't do anything... */
399 if (schema == NULL) {
400 ldb_asprintf_errstring(ldb_module_get_ctx(module), "cannot add allowedChildClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg->dn));
401 return LDB_ERR_OPERATIONS_ERROR;
404 /* Must remove any existing attribute, or else confusion reins */
405 ldb_msg_remove_attr(msg, "allowedChildClassesEffective");
407 oc_el = ldb_msg_find_element(sd_msg, "objectClass");
408 ret = dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module), msg, sd_msg, &sd);
409 if (ret != LDB_SUCCESS) {
413 sid = samdb_result_dom_sid(msg, sd_msg, "objectSid");
414 for (i=0; oc_el && i < oc_el->num_values; i++) {
415 sclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &oc_el->values[i]);
417 /* We don't know this class? what is going on? */
421 for (j=0; sclass->possibleInferiors && sclass->possibleInferiors[j]; j++) {
422 ret = acl_check_access_on_class(module,
426 acl_user_token(module),
428 SEC_ADS_CREATE_CHILD,
429 sclass->possibleInferiors[j]);
430 if (ret == LDB_SUCCESS) {
431 ldb_msg_add_string(msg, "allowedChildClassesEffective",
432 sclass->possibleInferiors[j]);
436 allowedClasses = ldb_msg_find_element(msg, "allowedChildClassesEffective");
437 if (!allowedClasses) {
441 if (allowedClasses->num_values > 1) {
442 TYPESAFE_QSORT(allowedClasses->values, allowedClasses->num_values, data_blob_cmp);
443 for (i=1 ; i < allowedClasses->num_values; i++) {
444 struct ldb_val *val1 = &allowedClasses->values[i-1];
445 struct ldb_val *val2 = &allowedClasses->values[i];
446 if (data_blob_cmp(val1, val2) == 0) {
447 memmove(val1, val2, (allowedClasses->num_values - i) * sizeof( struct ldb_val));
448 allowedClasses->num_values--;
456 static int acl_sDRightsEffective(struct ldb_module *module,
457 struct ldb_message *sd_msg,
458 struct ldb_message *msg,
459 struct acl_context *ac)
461 struct ldb_message_element *rightsEffective;
463 struct security_descriptor *sd;
464 struct ldb_control *as_system = ldb_request_get_control(ac->req,
465 LDB_CONTROL_AS_SYSTEM_OID);
466 struct dom_sid *sid = NULL;
469 if (as_system != NULL) {
470 as_system->critical = 0;
473 /* Must remove any existing attribute, or else confusion reins */
474 ldb_msg_remove_attr(msg, "sDRightsEffective");
475 ret = ldb_msg_add_empty(msg, "sDRightsEffective", 0, &rightsEffective);
476 if (ret != LDB_SUCCESS) {
479 if (ac->am_system || as_system) {
480 flags = SECINFO_OWNER | SECINFO_GROUP | SECINFO_SACL | SECINFO_DACL;
483 /* Get the security descriptor from the message */
484 ret = dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module), msg, sd_msg, &sd);
485 if (ret != LDB_SUCCESS) {
488 sid = samdb_result_dom_sid(msg, sd_msg, "objectSid");
489 ret = acl_check_access_on_attribute(module,
495 if (ret == LDB_SUCCESS) {
496 flags |= SECINFO_OWNER | SECINFO_GROUP;
498 ret = acl_check_access_on_attribute(module,
504 if (ret == LDB_SUCCESS) {
505 flags |= SECINFO_DACL;
507 ret = acl_check_access_on_attribute(module,
511 SEC_FLAG_SYSTEM_SECURITY,
513 if (ret == LDB_SUCCESS) {
514 flags |= SECINFO_SACL;
517 return samdb_msg_add_uint(ldb_module_get_ctx(module), msg, msg,
518 "sDRightsEffective", flags);
521 static int acl_validate_spn_value(TALLOC_CTX *mem_ctx,
522 struct ldb_context *ldb,
523 const char *spn_value,
524 uint32_t userAccountControl,
525 const char *samAccountName,
526 const char *dnsHostName,
527 const char *netbios_name,
528 const char *ntds_guid)
531 krb5_context krb_ctx;
532 krb5_error_code kerr;
533 krb5_principal principal;
537 const char *forest_name = samdb_forest_name(ldb, mem_ctx);
538 const char *base_domain = samdb_default_domain_name(ldb, mem_ctx);
539 struct loadparm_context *lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
540 struct loadparm_context);
541 bool is_dc = (userAccountControl & UF_SERVER_TRUST_ACCOUNT) ||
542 (userAccountControl & UF_PARTIAL_SECRETS_ACCOUNT);
544 if (strcasecmp_m(spn_value, samAccountName) == 0) {
545 /* MacOS X sets this value, and setting an SPN of your
546 * own samAccountName is both pointless and safe */
550 kerr = smb_krb5_init_context_basic(mem_ctx,
554 return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
555 "Could not initialize kerberos context.");
558 ret = krb5_parse_name(krb_ctx, spn_value, &principal);
560 krb5_free_context(krb_ctx);
561 return LDB_ERR_CONSTRAINT_VIOLATION;
564 if (principal->name.name_string.len < 2) {
568 instanceName = principal->name.name_string.val[1];
569 serviceType = principal->name.name_string.val[0];
570 if (principal->name.name_string.len == 3) {
571 serviceName = principal->name.name_string.val[2];
580 if (strcasecmp(serviceType, "ldap") == 0) {
581 if (strcasecmp(serviceName, netbios_name) != 0 &&
582 strcasecmp(serviceName, forest_name) != 0) {
586 } else if (strcasecmp(serviceType, "gc") == 0) {
587 if (strcasecmp(serviceName, forest_name) != 0) {
591 if (strcasecmp(serviceName, base_domain) != 0 &&
592 strcasecmp(serviceName, netbios_name) != 0) {
597 /* instanceName can be samAccountName without $ or dnsHostName
598 * or "ntds_guid._msdcs.forest_domain for DC objects */
599 if (strlen(instanceName) == (strlen(samAccountName) - 1)
600 && strncasecmp(instanceName, samAccountName, strlen(samAccountName) - 1) == 0) {
602 } else if (dnsHostName != NULL && strcasecmp(instanceName, dnsHostName) == 0) {
605 const char *guid_str;
606 guid_str = talloc_asprintf(mem_ctx,"%s._msdcs.%s",
609 if (strcasecmp(instanceName, guid_str) == 0) {
615 krb5_free_principal(krb_ctx, principal);
616 krb5_free_context(krb_ctx);
617 return LDB_ERR_CONSTRAINT_VIOLATION;
620 krb5_free_principal(krb_ctx, principal);
621 krb5_free_context(krb_ctx);
625 static int acl_check_spn(TALLOC_CTX *mem_ctx,
626 struct ldb_module *module,
627 struct ldb_request *req,
628 struct security_descriptor *sd,
630 const struct GUID *oc_guid,
631 const struct dsdb_attribute *attr)
635 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
636 struct ldb_context *ldb = ldb_module_get_ctx(module);
637 struct ldb_result *acl_res;
638 struct ldb_result *netbios_res;
639 struct ldb_message_element *el;
640 struct ldb_dn *partitions_dn = samdb_partitions_dn(ldb, tmp_ctx);
641 uint32_t userAccountControl;
642 const char *samAccountName;
643 const char *dnsHostName;
644 const char *netbios_name;
646 char *ntds_guid = NULL;
648 static const char *acl_attrs[] = {
651 "userAccountControl",
654 static const char *netbios_attrs[] = {
659 /* if we have wp, we can do whatever we like */
660 if (acl_check_access_on_attribute(module,
665 attr) == LDB_SUCCESS) {
666 talloc_free(tmp_ctx);
670 ret = acl_check_extended_right(tmp_ctx, sd, acl_user_token(module),
671 GUID_DRS_VALIDATE_SPN,
675 if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
676 dsdb_acl_debug(sd, acl_user_token(module),
677 req->op.mod.message->dn,
680 talloc_free(tmp_ctx);
684 ret = dsdb_module_search_dn(module, tmp_ctx,
685 &acl_res, req->op.mod.message->dn,
687 DSDB_FLAG_NEXT_MODULE |
688 DSDB_FLAG_AS_SYSTEM |
689 DSDB_SEARCH_SHOW_RECYCLED,
691 if (ret != LDB_SUCCESS) {
692 talloc_free(tmp_ctx);
696 userAccountControl = ldb_msg_find_attr_as_uint(acl_res->msgs[0], "userAccountControl", 0);
697 dnsHostName = ldb_msg_find_attr_as_string(acl_res->msgs[0], "dnsHostName", NULL);
698 samAccountName = ldb_msg_find_attr_as_string(acl_res->msgs[0], "samAccountName", NULL);
700 ret = dsdb_module_search(module, tmp_ctx,
701 &netbios_res, partitions_dn,
704 DSDB_FLAG_NEXT_MODULE |
708 ldb_dn_get_linearized(ldb_get_default_basedn(ldb)));
710 netbios_name = ldb_msg_find_attr_as_string(netbios_res->msgs[0], "nETBIOSName", NULL);
712 el = ldb_msg_find_element(req->op.mod.message, "servicePrincipalName");
714 talloc_free(tmp_ctx);
715 return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
716 "Error finding element for servicePrincipalName.");
719 /* NTDSDSA objectGuid of object we are checking SPN for */
720 if (userAccountControl & (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
721 ret = dsdb_module_find_ntdsguid_for_computer(module, tmp_ctx,
722 req->op.mod.message->dn, &ntds, req);
723 if (ret != LDB_SUCCESS) {
724 ldb_asprintf_errstring(ldb, "Failed to find NTDSDSA objectGuid for %s: %s",
725 ldb_dn_get_linearized(req->op.mod.message->dn),
727 talloc_free(tmp_ctx);
728 return LDB_ERR_OPERATIONS_ERROR;
730 ntds_guid = GUID_string(tmp_ctx, &ntds);
733 for (i=0; i < el->num_values; i++) {
734 ret = acl_validate_spn_value(tmp_ctx,
736 (char *)el->values[i].data,
742 if (ret != LDB_SUCCESS) {
743 talloc_free(tmp_ctx);
747 talloc_free(tmp_ctx);
751 static int acl_add(struct ldb_module *module, struct ldb_request *req)
754 struct ldb_dn *parent = ldb_dn_get_parent(req, req->op.add.message->dn);
755 struct ldb_context *ldb;
756 const struct dsdb_schema *schema;
757 struct ldb_message_element *oc_el;
758 const struct GUID *guid;
759 struct ldb_dn *nc_root;
760 struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
762 if (as_system != NULL) {
763 as_system->critical = 0;
766 if (dsdb_module_am_system(module) || as_system) {
767 return ldb_next_request(module, req);
769 if (ldb_dn_is_special(req->op.add.message->dn)) {
770 return ldb_next_request(module, req);
773 ldb = ldb_module_get_ctx(module);
775 /* Creating an NC. There is probably something we should do here,
776 * but we will establish that later */
778 ret = dsdb_find_nc_root(ldb, req, req->op.add.message->dn, &nc_root);
779 if (ret != LDB_SUCCESS) {
782 if (ldb_dn_compare(nc_root, req->op.add.message->dn) == 0) {
783 talloc_free(nc_root);
784 return ldb_next_request(module, req);
786 talloc_free(nc_root);
788 schema = dsdb_get_schema(ldb, req);
790 return ldb_operr(ldb);
793 oc_el = ldb_msg_find_element(req->op.add.message, "objectClass");
794 if (!oc_el || oc_el->num_values == 0) {
795 ldb_asprintf_errstring(ldb_module_get_ctx(module),
796 "acl: unable to find objectClass on %s\n",
797 ldb_dn_get_linearized(req->op.add.message->dn));
798 return ldb_module_done(req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
801 guid = class_schemaid_guid_by_lDAPDisplayName(schema,
802 (char *)oc_el->values[oc_el->num_values-1].data);
803 ret = dsdb_module_check_access_on_dn(module, req, parent, SEC_ADS_CREATE_CHILD, guid, req);
804 if (ret != LDB_SUCCESS) {
807 return ldb_next_request(module, req);
810 /* ckecks if modifications are allowed on "Member" attribute */
811 static int acl_check_self_membership(TALLOC_CTX *mem_ctx,
812 struct ldb_module *module,
813 struct ldb_request *req,
814 struct security_descriptor *sd,
816 const struct GUID *oc_guid,
817 const struct dsdb_attribute *attr)
821 struct ldb_context *ldb = ldb_module_get_ctx(module);
822 struct ldb_dn *user_dn;
823 struct ldb_message_element *member_el;
824 /* if we have wp, we can do whatever we like */
825 if (acl_check_access_on_attribute(module,
830 attr) == LDB_SUCCESS) {
833 /* if we are adding/deleting ourselves, check for self membership */
834 ret = dsdb_find_dn_by_sid(ldb, mem_ctx,
835 &acl_user_token(module)->sids[PRIMARY_USER_SID_INDEX],
837 if (ret != LDB_SUCCESS) {
840 member_el = ldb_msg_find_element(req->op.mod.message, "member");
842 return ldb_operr(ldb);
844 /* user can only remove oneself */
845 if (member_el->num_values == 0) {
846 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
848 for (i = 0; i < member_el->num_values; i++) {
849 if (strcasecmp((const char *)member_el->values[i].data,
850 ldb_dn_get_extended_linearized(mem_ctx, user_dn, 1)) != 0) {
851 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
854 ret = acl_check_extended_right(mem_ctx, sd, acl_user_token(module),
855 GUID_DRS_SELF_MEMBERSHIP,
858 if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
859 dsdb_acl_debug(sd, acl_user_token(module),
860 req->op.mod.message->dn,
867 static int acl_check_password_rights(TALLOC_CTX *mem_ctx,
868 struct ldb_module *module,
869 struct ldb_request *req,
870 struct security_descriptor *sd,
872 const struct GUID *oc_guid,
875 int ret = LDB_SUCCESS;
876 unsigned int del_attr_cnt = 0, add_attr_cnt = 0, rep_attr_cnt = 0;
877 struct ldb_message_element *el;
878 struct ldb_message *msg;
879 const char *passwordAttrs[] = { "userPassword", "clearTextPassword",
880 "unicodePwd", "dBCSPwd", NULL }, **l;
881 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
883 msg = ldb_msg_copy_shallow(tmp_ctx, req->op.mod.message);
885 return ldb_module_oom(module);
887 for (l = passwordAttrs; *l != NULL; l++) {
888 if ((!userPassword) && (ldb_attr_cmp(*l, "userPassword") == 0)) {
892 while ((el = ldb_msg_find_element(msg, *l)) != NULL) {
893 if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE) {
896 if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_ADD) {
899 if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) {
902 ldb_msg_remove_element(msg, el);
906 /* single deletes will be handled by the "password_hash" LDB module
907 * later in the stack, so we let it though here */
908 if ((del_attr_cnt > 0) && (add_attr_cnt == 0) && (rep_attr_cnt == 0)) {
909 talloc_free(tmp_ctx);
913 if (ldb_request_get_control(req,
914 DSDB_CONTROL_PASSWORD_CHANGE_OID) != NULL) {
915 /* The "DSDB_CONTROL_PASSWORD_CHANGE_OID" control means that we
916 * have a user password change and not a set as the message
917 * looks like. In it's value blob it contains the NT and/or LM
918 * hash of the old password specified by the user.
919 * This control is used by the SAMR and "kpasswd" password
920 * change mechanisms. */
921 ret = acl_check_extended_right(tmp_ctx, sd, acl_user_token(module),
922 GUID_DRS_USER_CHANGE_PASSWORD,
923 SEC_ADS_CONTROL_ACCESS,
926 else if (rep_attr_cnt > 0 || (add_attr_cnt != del_attr_cnt)) {
927 ret = acl_check_extended_right(tmp_ctx, sd, acl_user_token(module),
928 GUID_DRS_FORCE_CHANGE_PASSWORD,
929 SEC_ADS_CONTROL_ACCESS,
932 else if (add_attr_cnt == 1 && del_attr_cnt == 1) {
933 ret = acl_check_extended_right(tmp_ctx, sd, acl_user_token(module),
934 GUID_DRS_USER_CHANGE_PASSWORD,
935 SEC_ADS_CONTROL_ACCESS,
937 /* Very strange, but we get constraint violation in this case */
938 if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
939 ret = LDB_ERR_CONSTRAINT_VIOLATION;
942 if (ret != LDB_SUCCESS) {
943 dsdb_acl_debug(sd, acl_user_token(module),
944 req->op.mod.message->dn,
948 talloc_free(tmp_ctx);
952 static const struct GUID *get_oc_guid_from_message(const struct dsdb_schema *schema,
953 struct ldb_message *msg)
955 struct ldb_message_element *oc_el;
956 const struct dsdb_class *object_class;
958 oc_el = ldb_msg_find_element(msg, "objectClass");
963 object_class = dsdb_get_last_structural_class(schema, oc_el);
964 if (object_class == NULL) {
968 return &object_class->schemaIDGUID;
972 static int acl_modify(struct ldb_module *module, struct ldb_request *req)
975 struct ldb_context *ldb = ldb_module_get_ctx(module);
976 const struct dsdb_schema *schema;
978 const struct GUID *guid;
979 uint32_t access_granted;
980 struct object_tree *root = NULL;
981 struct object_tree *new_node = NULL;
983 struct ldb_result *acl_res;
984 struct security_descriptor *sd;
985 struct dom_sid *sid = NULL;
986 struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
987 bool userPassword = dsdb_user_password_support(module, req, req);
988 TALLOC_CTX *tmp_ctx = talloc_new(req);
989 static const char *acl_attrs[] = {
990 "nTSecurityDescriptor",
996 if (as_system != NULL) {
997 as_system->critical = 0;
1000 /* Don't print this debug statement if elements[0].name is going to be NULL */
1001 if(req->op.mod.message->num_elements > 0)
1003 DEBUG(10, ("ldb:acl_modify: %s\n", req->op.mod.message->elements[0].name));
1005 if (dsdb_module_am_system(module) || as_system) {
1006 return ldb_next_request(module, req);
1008 if (ldb_dn_is_special(req->op.mod.message->dn)) {
1009 return ldb_next_request(module, req);
1011 ret = dsdb_module_search_dn(module, tmp_ctx, &acl_res, req->op.mod.message->dn,
1013 DSDB_FLAG_NEXT_MODULE |
1014 DSDB_FLAG_AS_SYSTEM |
1015 DSDB_SEARCH_SHOW_RECYCLED,
1018 if (ret != LDB_SUCCESS) {
1022 schema = dsdb_get_schema(ldb, tmp_ctx);
1024 talloc_free(tmp_ctx);
1025 return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
1026 "acl_modify: Error obtaining schema.");
1029 ret = dsdb_get_sd_from_ldb_message(ldb, tmp_ctx, acl_res->msgs[0], &sd);
1030 if (ret != LDB_SUCCESS) {
1031 talloc_free(tmp_ctx);
1032 return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
1033 "acl_modify: Error retrieving security descriptor.");
1035 /* Theoretically we pass the check if the object has no sd */
1040 guid = get_oc_guid_from_message(schema, acl_res->msgs[0]);
1042 talloc_free(tmp_ctx);
1043 return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
1044 "acl_modify: Error retrieving object class GUID.");
1046 sid = samdb_result_dom_sid(req, acl_res->msgs[0], "objectSid");
1047 if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
1048 &root, &new_node)) {
1049 talloc_free(tmp_ctx);
1050 return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
1051 "acl_modify: Error adding new node in object tree.");
1053 for (i=0; i < req->op.mod.message->num_elements; i++){
1054 const struct dsdb_attribute *attr;
1055 attr = dsdb_attribute_by_lDAPDisplayName(schema,
1056 req->op.mod.message->elements[i].name);
1058 if (ldb_attr_cmp("nTSecurityDescriptor", req->op.mod.message->elements[i].name) == 0) {
1059 uint32_t sd_flags = dsdb_request_sd_flags(req, NULL);
1060 uint32_t access_mask = 0;
1062 if (sd_flags & (SECINFO_OWNER|SECINFO_GROUP)) {
1063 access_mask |= SEC_STD_WRITE_OWNER;
1065 if (sd_flags & SECINFO_DACL) {
1066 access_mask |= SEC_STD_WRITE_DAC;
1068 if (sd_flags & SECINFO_SACL) {
1069 access_mask |= SEC_FLAG_SYSTEM_SECURITY;
1072 status = sec_access_check_ds(sd, acl_user_token(module),
1078 if (!NT_STATUS_IS_OK(status)) {
1079 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1080 "Object %s has no write dacl access\n",
1081 ldb_dn_get_linearized(req->op.mod.message->dn));
1083 acl_user_token(module),
1084 req->op.mod.message->dn,
1087 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1091 else if (ldb_attr_cmp("member", req->op.mod.message->elements[i].name) == 0) {
1092 ret = acl_check_self_membership(tmp_ctx,
1099 if (ret != LDB_SUCCESS) {
1103 else if (ldb_attr_cmp("dBCSPwd", req->op.mod.message->elements[i].name) == 0) {
1104 /* this one is not affected by any rights, we should let it through
1105 so that passwords_hash returns the correct error */
1108 else if (ldb_attr_cmp("unicodePwd", req->op.mod.message->elements[i].name) == 0 ||
1109 (userPassword && ldb_attr_cmp("userPassword", req->op.mod.message->elements[i].name) == 0) ||
1110 ldb_attr_cmp("clearTextPassword", req->op.mod.message->elements[i].name) == 0) {
1111 ret = acl_check_password_rights(tmp_ctx,
1118 if (ret != LDB_SUCCESS) {
1121 } else if (ldb_attr_cmp("servicePrincipalName", req->op.mod.message->elements[i].name) == 0) {
1122 ret = acl_check_spn(tmp_ctx,
1129 if (ret != LDB_SUCCESS) {
1134 /* This basic attribute existence check with the right errorcode
1135 * is needed since this module is the first one which requests
1136 * schema attribute information.
1137 * The complete attribute checking is done in the
1138 * "objectclass_attrs" module behind this one.
1141 ldb_asprintf_errstring(ldb, "acl_modify: attribute '%s' on entry '%s' was not found in the schema!",
1142 req->op.mod.message->elements[i].name,
1143 ldb_dn_get_linearized(req->op.mod.message->dn));
1144 ret = LDB_ERR_NO_SUCH_ATTRIBUTE;
1147 if (!insert_in_object_tree(tmp_ctx,
1148 &attr->attributeSecurityGUID, SEC_ADS_WRITE_PROP,
1149 &new_node, &new_node)) {
1150 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1151 "acl_modify: cannot add to object tree securityGUID\n");
1152 ret = LDB_ERR_OPERATIONS_ERROR;
1156 if (!insert_in_object_tree(tmp_ctx,
1157 &attr->schemaIDGUID, SEC_ADS_WRITE_PROP, &new_node, &new_node)) {
1158 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1159 "acl_modify: cannot add to object tree attributeGUID\n");
1160 ret = LDB_ERR_OPERATIONS_ERROR;
1166 if (root->num_of_children > 0) {
1167 status = sec_access_check_ds(sd, acl_user_token(module),
1173 if (!NT_STATUS_IS_OK(status)) {
1174 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1175 "Object %s has no write property access\n",
1176 ldb_dn_get_linearized(req->op.mod.message->dn));
1178 acl_user_token(module),
1179 req->op.mod.message->dn,
1182 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1188 talloc_free(tmp_ctx);
1189 return ldb_next_request(module, req);
1191 talloc_free(tmp_ctx);
1195 /* similar to the modify for the time being.
1196 * We need to consider the special delete tree case, though - TODO */
1197 static int acl_delete(struct ldb_module *module, struct ldb_request *req)
1200 struct ldb_dn *parent = ldb_dn_get_parent(req, req->op.del.dn);
1201 struct ldb_context *ldb;
1202 struct ldb_dn *nc_root;
1203 struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
1205 if (as_system != NULL) {
1206 as_system->critical = 0;
1209 DEBUG(10, ("ldb:acl_delete: %s\n", ldb_dn_get_linearized(req->op.del.dn)));
1210 if (dsdb_module_am_system(module) || as_system) {
1211 return ldb_next_request(module, req);
1213 if (ldb_dn_is_special(req->op.del.dn)) {
1214 return ldb_next_request(module, req);
1217 ldb = ldb_module_get_ctx(module);
1219 /* Make sure we aren't deleting a NC */
1221 ret = dsdb_find_nc_root(ldb, req, req->op.del.dn, &nc_root);
1222 if (ret != LDB_SUCCESS) {
1225 if (ldb_dn_compare(nc_root, req->op.del.dn) == 0) {
1226 talloc_free(nc_root);
1227 DEBUG(10,("acl:deleting a NC\n"));
1228 /* Windows returns "ERR_UNWILLING_TO_PERFORM */
1229 return ldb_module_done(req, NULL, NULL,
1230 LDB_ERR_UNWILLING_TO_PERFORM);
1232 talloc_free(nc_root);
1234 if (ldb_request_get_control(req, LDB_CONTROL_TREE_DELETE_OID)) {
1235 ret = dsdb_module_check_access_on_dn(module, req,
1237 SEC_ADS_DELETE_TREE, NULL,
1239 if (ret != LDB_SUCCESS) {
1243 return ldb_next_request(module, req);
1246 /* First check if we have delete object right */
1247 ret = dsdb_module_check_access_on_dn(module, req, req->op.del.dn,
1248 SEC_STD_DELETE, NULL, req);
1249 if (ret == LDB_SUCCESS) {
1250 return ldb_next_request(module, req);
1253 /* Nope, we don't have delete object. Lets check if we have delete
1254 * child on the parent */
1255 ret = dsdb_module_check_access_on_dn(module, req, parent,
1256 SEC_ADS_DELETE_CHILD, NULL, req);
1257 if (ret != LDB_SUCCESS) {
1261 return ldb_next_request(module, req);
1264 static int acl_rename(struct ldb_module *module, struct ldb_request *req)
1267 struct ldb_dn *oldparent = ldb_dn_get_parent(req, req->op.rename.olddn);
1268 struct ldb_dn *newparent = ldb_dn_get_parent(req, req->op.rename.newdn);
1269 const struct dsdb_schema *schema;
1270 struct ldb_context *ldb;
1271 struct security_descriptor *sd = NULL;
1272 struct dom_sid *sid = NULL;
1273 struct ldb_result *acl_res;
1274 const struct GUID *guid;
1275 struct ldb_dn *nc_root;
1276 struct object_tree *root = NULL;
1277 struct object_tree *new_node = NULL;
1278 struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
1279 TALLOC_CTX *tmp_ctx = talloc_new(req);
1281 uint32_t access_granted;
1282 const char *rdn_name;
1283 static const char *acl_attrs[] = {
1284 "nTSecurityDescriptor",
1290 if (as_system != NULL) {
1291 as_system->critical = 0;
1294 DEBUG(10, ("ldb:acl_rename: %s\n", ldb_dn_get_linearized(req->op.rename.olddn)));
1295 if (dsdb_module_am_system(module) || as_system) {
1296 return ldb_next_request(module, req);
1298 if (ldb_dn_is_special(req->op.rename.olddn)) {
1299 return ldb_next_request(module, req);
1302 ldb = ldb_module_get_ctx(module);
1304 /* Make sure we aren't renaming/moving a NC */
1306 ret = dsdb_find_nc_root(ldb, req, req->op.rename.olddn, &nc_root);
1307 if (ret != LDB_SUCCESS) {
1310 if (ldb_dn_compare(nc_root, req->op.rename.olddn) == 0) {
1311 talloc_free(nc_root);
1312 DEBUG(10,("acl:renaming/moving a NC\n"));
1313 /* Windows returns "ERR_UNWILLING_TO_PERFORM */
1314 return ldb_module_done(req, NULL, NULL,
1315 LDB_ERR_UNWILLING_TO_PERFORM);
1317 talloc_free(nc_root);
1319 /* Look for the parent */
1321 ret = dsdb_module_search_dn(module, tmp_ctx, &acl_res,
1322 req->op.rename.olddn, acl_attrs,
1323 DSDB_FLAG_NEXT_MODULE |
1324 DSDB_FLAG_AS_SYSTEM |
1325 DSDB_SEARCH_SHOW_RECYCLED, req);
1326 /* we sould be able to find the parent */
1327 if (ret != LDB_SUCCESS) {
1328 DEBUG(10,("acl: failed to find object %s\n",
1329 ldb_dn_get_linearized(req->op.rename.olddn)));
1330 talloc_free(tmp_ctx);
1334 schema = dsdb_get_schema(ldb, acl_res);
1336 talloc_free(tmp_ctx);
1337 return ldb_operr(ldb);
1340 guid = get_oc_guid_from_message(schema, acl_res->msgs[0]);
1341 if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
1342 &root, &new_node)) {
1343 talloc_free(tmp_ctx);
1344 return ldb_operr(ldb);
1347 guid = attribute_schemaid_guid_by_lDAPDisplayName(schema,
1349 if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
1350 &new_node, &new_node)) {
1351 talloc_free(tmp_ctx);
1352 return ldb_operr(ldb);
1355 rdn_name = ldb_dn_get_rdn_name(req->op.rename.olddn);
1356 if (rdn_name == NULL) {
1357 talloc_free(tmp_ctx);
1358 return ldb_operr(ldb);
1360 guid = attribute_schemaid_guid_by_lDAPDisplayName(schema,
1362 if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
1363 &new_node, &new_node)) {
1364 talloc_free(tmp_ctx);
1365 return ldb_operr(ldb);
1368 ret = dsdb_get_sd_from_ldb_message(ldb, req, acl_res->msgs[0], &sd);
1370 if (ret != LDB_SUCCESS) {
1371 talloc_free(tmp_ctx);
1372 return ldb_operr(ldb);
1374 /* Theoretically we pass the check if the object has no sd */
1376 talloc_free(tmp_ctx);
1379 sid = samdb_result_dom_sid(req, acl_res->msgs[0], "objectSid");
1380 status = sec_access_check_ds(sd, acl_user_token(module),
1386 if (!NT_STATUS_IS_OK(status)) {
1387 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1388 "Object %s has no wp on name\n",
1389 ldb_dn_get_linearized(req->op.rename.olddn));
1391 acl_user_token(module),
1392 req->op.rename.olddn,
1395 talloc_free(tmp_ctx);
1396 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1399 if (ldb_dn_compare(oldparent, newparent) == 0) {
1400 /* regular rename, not move, nothing more to do */
1401 talloc_free(tmp_ctx);
1402 return ldb_next_request(module, req);
1405 /* new parent should have create child */
1408 guid = get_oc_guid_from_message(schema, acl_res->msgs[0]);
1410 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1411 "acl:renamed object has no object class\n");
1412 talloc_free(tmp_ctx);
1413 return ldb_module_done(req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
1416 ret = dsdb_module_check_access_on_dn(module, req, newparent, SEC_ADS_CREATE_CHILD, guid, req);
1417 if (ret != LDB_SUCCESS) {
1418 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1419 "acl:access_denied renaming %s",
1420 ldb_dn_get_linearized(req->op.rename.olddn));
1421 talloc_free(tmp_ctx);
1424 /* do we have delete object on the object? */
1426 status = sec_access_check_ds(sd, acl_user_token(module),
1432 if (NT_STATUS_IS_OK(status)) {
1433 talloc_free(tmp_ctx);
1434 return ldb_next_request(module, req);
1436 /* what about delete child on the current parent */
1437 ret = dsdb_module_check_access_on_dn(module, req, oldparent, SEC_ADS_DELETE_CHILD, NULL, req);
1438 if (ret != LDB_SUCCESS) {
1439 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1440 "acl:access_denied renaming %s", ldb_dn_get_linearized(req->op.rename.olddn));
1441 talloc_free(tmp_ctx);
1442 return ldb_module_done(req, NULL, NULL, ret);
1445 talloc_free(tmp_ctx);
1447 return ldb_next_request(module, req);
1450 static int acl_search_update_confidential_attrs(struct acl_context *ac,
1451 struct acl_private *data)
1453 struct dsdb_attribute *a;
1456 if (data->acl_search) {
1458 * If acl:search is activated, the acl_read module
1459 * protects confidential attributes.
1464 if ((ac->schema == data->cached_schema_ptr) &&
1465 (ac->schema->loaded_usn == data->cached_schema_loaded_usn) &&
1466 (ac->schema->metadata_usn == data->cached_schema_metadata_usn))
1471 data->cached_schema_ptr = NULL;
1472 data->cached_schema_loaded_usn = 0;
1473 data->cached_schema_metadata_usn = 0;
1474 TALLOC_FREE(data->confidential_attrs);
1476 if (ac->schema == NULL) {
1480 for (a = ac->schema->attributes; a; a = a->next) {
1481 const char **attrs = data->confidential_attrs;
1483 if (!(a->searchFlags & SEARCH_FLAG_CONFIDENTIAL)) {
1487 attrs = talloc_realloc(data, attrs, const char *, n + 2);
1488 if (attrs == NULL) {
1489 TALLOC_FREE(data->confidential_attrs);
1490 return ldb_module_oom(ac->module);
1493 attrs[n] = a->lDAPDisplayName;
1497 data->confidential_attrs = attrs;
1500 data->cached_schema_ptr = ac->schema;
1501 data->cached_schema_loaded_usn = ac->schema->loaded_usn;
1502 data->cached_schema_metadata_usn = ac->schema->metadata_usn;
1507 static int acl_search_callback(struct ldb_request *req, struct ldb_reply *ares)
1509 struct acl_context *ac;
1510 struct acl_private *data;
1511 struct ldb_result *acl_res;
1512 static const char *acl_attrs[] = {
1514 "nTSecurityDescriptor",
1521 ac = talloc_get_type(req->context, struct acl_context);
1522 data = talloc_get_type(ldb_module_get_private(ac->module), struct acl_private);
1524 return ldb_module_done(ac->req, NULL, NULL,
1525 LDB_ERR_OPERATIONS_ERROR);
1527 if (ares->error != LDB_SUCCESS) {
1528 return ldb_module_done(ac->req, ares->controls,
1529 ares->response, ares->error);
1532 switch (ares->type) {
1533 case LDB_REPLY_ENTRY:
1534 if (ac->constructed_attrs) {
1535 ret = dsdb_module_search_dn(ac->module, ac, &acl_res, ares->message->dn,
1537 DSDB_FLAG_NEXT_MODULE |
1538 DSDB_FLAG_AS_SYSTEM |
1539 DSDB_SEARCH_SHOW_RECYCLED,
1541 if (ret != LDB_SUCCESS) {
1542 return ldb_module_done(ac->req, NULL, NULL, ret);
1546 if (ac->allowedAttributes || ac->allowedAttributesEffective) {
1547 ret = acl_allowedAttributes(ac->module, ac->schema,
1550 if (ret != LDB_SUCCESS) {
1551 return ldb_module_done(ac->req, NULL, NULL, ret);
1555 if (ac->allowedChildClasses) {
1556 ret = acl_childClasses(ac->module, ac->schema,
1559 "allowedChildClasses");
1560 if (ret != LDB_SUCCESS) {
1561 return ldb_module_done(ac->req, NULL, NULL, ret);
1565 if (ac->allowedChildClassesEffective) {
1566 ret = acl_childClassesEffective(ac->module, ac->schema,
1569 if (ret != LDB_SUCCESS) {
1570 return ldb_module_done(ac->req, NULL, NULL, ret);
1574 if (ac->sDRightsEffective) {
1575 ret = acl_sDRightsEffective(ac->module,
1578 if (ret != LDB_SUCCESS) {
1579 return ldb_module_done(ac->req, NULL, NULL, ret);
1584 return ldb_module_send_entry(ac->req, ares->message,
1588 if (ac->am_system) {
1589 return ldb_module_send_entry(ac->req, ares->message,
1593 if (data->password_attrs != NULL) {
1594 for (i = 0; data->password_attrs[i]; i++) {
1595 if ((!ac->userPassword) &&
1596 (ldb_attr_cmp(data->password_attrs[i],
1597 "userPassword") == 0))
1602 ldb_msg_remove_attr(ares->message, data->password_attrs[i]);
1606 if (ac->am_administrator) {
1607 return ldb_module_send_entry(ac->req, ares->message,
1611 ret = acl_search_update_confidential_attrs(ac, data);
1612 if (ret != LDB_SUCCESS) {
1616 if (data->confidential_attrs != NULL) {
1617 for (i = 0; data->confidential_attrs[i]; i++) {
1618 ldb_msg_remove_attr(ares->message,
1619 data->confidential_attrs[i]);
1623 return ldb_module_send_entry(ac->req, ares->message, ares->controls);
1625 case LDB_REPLY_REFERRAL:
1626 return ldb_module_send_referral(ac->req, ares->referral);
1628 case LDB_REPLY_DONE:
1629 return ldb_module_done(ac->req, ares->controls,
1630 ares->response, LDB_SUCCESS);
1636 static int acl_search(struct ldb_module *module, struct ldb_request *req)
1638 struct ldb_context *ldb;
1639 struct acl_context *ac;
1640 struct ldb_parse_tree *down_tree;
1641 struct ldb_request *down_req;
1642 struct acl_private *data;
1646 ldb = ldb_module_get_ctx(module);
1648 ac = talloc_zero(req, struct acl_context);
1650 return ldb_oom(ldb);
1652 data = talloc_get_type(ldb_module_get_private(module), struct acl_private);
1654 ac->module = module;
1656 ac->am_system = dsdb_module_am_system(module);
1657 ac->am_administrator = dsdb_module_am_administrator(module);
1658 ac->constructed_attrs = false;
1659 ac->modify_search = true;
1660 ac->allowedAttributes = ldb_attr_in_list(req->op.search.attrs, "allowedAttributes");
1661 ac->allowedAttributesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedAttributesEffective");
1662 ac->allowedChildClasses = ldb_attr_in_list(req->op.search.attrs, "allowedChildClasses");
1663 ac->allowedChildClassesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedChildClassesEffective");
1664 ac->sDRightsEffective = ldb_attr_in_list(req->op.search.attrs, "sDRightsEffective");
1665 ac->userPassword = dsdb_user_password_support(module, ac, req);
1666 ac->schema = dsdb_get_schema(ldb, ac);
1668 ac->constructed_attrs |= ac->allowedAttributes;
1669 ac->constructed_attrs |= ac->allowedChildClasses;
1670 ac->constructed_attrs |= ac->allowedChildClassesEffective;
1671 ac->constructed_attrs |= ac->allowedAttributesEffective;
1672 ac->constructed_attrs |= ac->sDRightsEffective;
1675 ac->modify_search = false;
1677 if (ac->am_system) {
1678 ac->modify_search = false;
1681 if (!ac->constructed_attrs && !ac->modify_search) {
1682 return ldb_next_request(module, req);
1685 ret = acl_search_update_confidential_attrs(ac, data);
1686 if (ret != LDB_SUCCESS) {
1690 down_tree = ldb_parse_tree_copy_shallow(ac, req->op.search.tree);
1691 if (down_tree == NULL) {
1692 return ldb_oom(ldb);
1695 if (!ac->am_system && data->password_attrs) {
1696 for (i = 0; data->password_attrs[i]; i++) {
1697 if ((!ac->userPassword) &&
1698 (ldb_attr_cmp(data->password_attrs[i],
1699 "userPassword") == 0))
1704 ldb_parse_tree_attr_replace(down_tree,
1705 data->password_attrs[i],
1706 "kludgeACLredactedattribute");
1710 if (!ac->am_system && !ac->am_administrator && data->confidential_attrs) {
1711 for (i = 0; data->confidential_attrs[i]; i++) {
1712 ldb_parse_tree_attr_replace(down_tree,
1713 data->confidential_attrs[i],
1714 "kludgeACLredactedattribute");
1718 ret = ldb_build_search_req_ex(&down_req,
1720 req->op.search.base,
1721 req->op.search.scope,
1723 req->op.search.attrs,
1725 ac, acl_search_callback,
1727 LDB_REQ_SET_LOCATION(down_req);
1728 if (ret != LDB_SUCCESS) {
1731 /* perform the search */
1732 return ldb_next_request(module, down_req);
1735 static int acl_extended(struct ldb_module *module, struct ldb_request *req)
1737 struct ldb_context *ldb = ldb_module_get_ctx(module);
1738 struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
1740 /* allow everybody to read the sequence number */
1741 if (strcmp(req->op.extended.oid,
1742 LDB_EXTENDED_SEQUENCE_NUMBER) == 0) {
1743 return ldb_next_request(module, req);
1746 if (dsdb_module_am_system(module) ||
1747 dsdb_module_am_administrator(module) || as_system) {
1748 return ldb_next_request(module, req);
1750 ldb_asprintf_errstring(ldb,
1752 "attempted database modify not permitted. "
1753 "User %s is not SYSTEM or an administrator",
1754 acl_user_name(req, module));
1755 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1759 static const struct ldb_module_ops ldb_acl_module_ops = {
1761 .search = acl_search,
1763 .modify = acl_modify,
1765 .rename = acl_rename,
1766 .extended = acl_extended,
1767 .init_context = acl_module_init
1770 int ldb_acl_module_init(const char *version)
1772 LDB_MODULE_CHECK_VERSION(version);
1773 return ldb_register_module(&ldb_acl_module_ops);