4 Copyright (C) Simo Sorce 2006-2008
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2009
6 Copyright (C) Stefan Metzmacher 2009
7 Copyright (C) Matthias Dieter Wallnöfer 2010
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public
20 License along with this library; if not, see <http://www.gnu.org/licenses/>.
26 * Component: objectclass attribute checking module
28 * Description: this checks the attributes on a directory entry (if they're
29 * allowed, if the syntax is correct, if mandatory ones are missing,
30 * denies the deletion of mandatory ones...). The module contains portions
31 * of the "objectclass" and the "validate_update" LDB module.
33 * Author: Matthias Dieter Wallnöfer
37 #include "ldb_module.h"
38 #include "dsdb/samdb/samdb.h"
42 struct ldb_module *module;
43 struct ldb_request *req;
44 const struct dsdb_schema *schema;
46 struct ldb_reply *search_res;
47 struct ldb_reply *mod_ares;
50 static struct oc_context *oc_init_context(struct ldb_module *module,
51 struct ldb_request *req)
53 struct ldb_context *ldb;
54 struct oc_context *ac;
56 ldb = ldb_module_get_ctx(module);
58 ac = talloc_zero(req, struct oc_context);
66 ac->schema = dsdb_get_schema(ldb, ac);
71 static int oc_op_callback(struct ldb_request *req, struct ldb_reply *ares);
73 static int attr_handler(struct oc_context *ac)
75 struct ldb_context *ldb;
76 struct ldb_message *msg;
77 struct ldb_request *child_req;
78 const struct dsdb_attribute *attr;
82 struct dsdb_syntax_ctx syntax_ctx;
84 ldb = ldb_module_get_ctx(ac->module);
86 if (ac->req->operation == LDB_ADD) {
87 msg = ldb_msg_copy_shallow(ac, ac->req->op.add.message);
89 msg = ldb_msg_copy_shallow(ac, ac->req->op.mod.message);
95 /* initialize syntax checking context */
96 dsdb_syntax_ctx_init(&syntax_ctx, ldb, ac->schema);
98 /* Check if attributes exist in the schema, if the values match,
99 * if they're not operational and fix the names to the match the schema
101 for (i = 0; i < msg->num_elements; i++) {
102 attr = dsdb_attribute_by_lDAPDisplayName(ac->schema,
103 msg->elements[i].name);
105 ldb_asprintf_errstring(ldb, "objectclass_attrs: attribute '%s' on entry '%s' was not found in the schema!",
106 msg->elements[i].name,
107 ldb_dn_get_linearized(msg->dn));
108 return LDB_ERR_NO_SUCH_ATTRIBUTE;
111 if ((attr->linkID & 1) == 1) {
112 /* Odd is for the target. Illegal to modify */
113 ldb_asprintf_errstring(ldb,
114 "objectclass_attrs: attribute '%s' on entry '%s' must not be modified directly, it is a linked attribute",
115 msg->elements[i].name,
116 ldb_dn_get_linearized(msg->dn));
117 return LDB_ERR_UNWILLING_TO_PERFORM;
120 if (!(msg->elements[i].flags & LDB_FLAG_INTERNAL_DISABLE_VALIDATION)) {
121 werr = attr->syntax->validate_ldb(&syntax_ctx, attr,
123 if (!W_ERROR_IS_OK(werr)) {
124 ldb_asprintf_errstring(ldb, "objectclass_attrs: attribute '%s' on entry '%s' contains at least one invalid value!",
125 msg->elements[i].name,
126 ldb_dn_get_linearized(msg->dn));
127 return LDB_ERR_INVALID_ATTRIBUTE_SYNTAX;
131 if ((attr->systemFlags & DS_FLAG_ATTR_IS_CONSTRUCTED) != 0) {
132 ldb_asprintf_errstring(ldb, "objectclass_attrs: attribute '%s' on entry '%s' is constructed!",
133 msg->elements[i].name,
134 ldb_dn_get_linearized(msg->dn));
135 if (ac->req->operation == LDB_ADD) {
136 return LDB_ERR_UNDEFINED_ATTRIBUTE_TYPE;
138 return LDB_ERR_CONSTRAINT_VIOLATION;
142 /* Substitute the attribute name to match in case */
143 msg->elements[i].name = attr->lDAPDisplayName;
146 if (ac->req->operation == LDB_ADD) {
147 ret = ldb_build_add_req(&child_req, ldb, ac,
148 msg, ac->req->controls,
149 ac, oc_op_callback, ac->req);
150 LDB_REQ_SET_LOCATION(child_req);
152 ret = ldb_build_mod_req(&child_req, ldb, ac,
153 msg, ac->req->controls,
154 ac, oc_op_callback, ac->req);
155 LDB_REQ_SET_LOCATION(child_req);
157 if (ret != LDB_SUCCESS) {
161 return ldb_next_request(ac->module, child_req);
165 these are attributes which are left over from old ways of doing
166 things in ldb, and are harmless
168 static const char *harmless_attrs[] = { "parentGUID", NULL };
170 static int attr_handler2(struct oc_context *ac)
172 struct ldb_context *ldb;
173 struct ldb_message_element *oc_element;
174 struct ldb_message *msg;
175 const char **must_contain, **may_contain, **found_must_contain;
176 const struct dsdb_attribute *attr;
180 ldb = ldb_module_get_ctx(ac->module);
182 if (ac->search_res == NULL) {
183 return ldb_operr(ldb);
186 /* We rely here on the preceding "objectclass" LDB module which did
187 * already fix up the objectclass list (inheritance, order...). */
188 oc_element = ldb_msg_find_element(ac->search_res->message,
190 if (oc_element == NULL) {
191 return ldb_operr(ldb);
194 must_contain = dsdb_full_attribute_list(ac, ac->schema, oc_element,
195 DSDB_SCHEMA_ALL_MUST);
196 may_contain = dsdb_full_attribute_list(ac, ac->schema, oc_element,
197 DSDB_SCHEMA_ALL_MAY);
198 found_must_contain = const_str_list(str_list_copy(ac, must_contain));
199 if ((must_contain == NULL) || (may_contain == NULL)
200 || (found_must_contain == NULL)) {
201 return ldb_operr(ldb);
204 /* Check if all specified attributes are valid in the given
205 * objectclasses and if they meet additional schema restrictions. */
206 msg = ac->search_res->message;
207 for (i = 0; i < msg->num_elements; i++) {
208 attr = dsdb_attribute_by_lDAPDisplayName(ac->schema,
209 msg->elements[i].name);
211 return ldb_operr(ldb);
214 /* Check if they're single-valued if this is requested */
215 if ((msg->elements[i].num_values > 1) && (attr->isSingleValued)) {
216 ldb_asprintf_errstring(ldb, "objectclass_attrs: attribute '%s' on entry '%s' is single-valued!",
217 msg->elements[i].name,
218 ldb_dn_get_linearized(msg->dn));
219 if (ac->req->operation == LDB_ADD) {
220 return LDB_ERR_CONSTRAINT_VIOLATION;
222 return LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS;
226 /* We can use "str_list_check" with "strcmp" here since the
227 * attribute informations from the schema are always equal
229 found = str_list_check(must_contain, attr->lDAPDisplayName);
231 str_list_remove(found_must_contain, attr->lDAPDisplayName);
233 found = str_list_check(may_contain, attr->lDAPDisplayName);
236 found = str_list_check(harmless_attrs, attr->lDAPDisplayName);
239 ldb_asprintf_errstring(ldb, "objectclass_attrs: attribute '%s' on entry '%s' does not exist in the specified objectclasses!",
240 msg->elements[i].name,
241 ldb_dn_get_linearized(msg->dn));
242 return LDB_ERR_OBJECT_CLASS_VIOLATION;
246 if (found_must_contain[0] != NULL) {
247 ldb_asprintf_errstring(ldb, "objectclass_attrs: at least one mandatory attribute ('%s') on entry '%s' wasn't specified!",
248 found_must_contain[0],
249 ldb_dn_get_linearized(msg->dn));
250 return LDB_ERR_OBJECT_CLASS_VIOLATION;
253 return ldb_module_done(ac->req, ac->mod_ares->controls,
254 ac->mod_ares->response, LDB_SUCCESS);
257 static int get_search_callback(struct ldb_request *req, struct ldb_reply *ares)
259 struct ldb_context *ldb;
260 struct oc_context *ac;
263 ac = talloc_get_type(req->context, struct oc_context);
264 ldb = ldb_module_get_ctx(ac->module);
267 return ldb_module_done(ac->req, NULL, NULL,
268 LDB_ERR_OPERATIONS_ERROR);
270 if (ares->error != LDB_SUCCESS) {
271 return ldb_module_done(ac->req, ares->controls,
272 ares->response, ares->error);
275 ldb_reset_err_string(ldb);
277 switch (ares->type) {
278 case LDB_REPLY_ENTRY:
279 if (ac->search_res != NULL) {
280 ldb_set_errstring(ldb, "Too many results");
282 return ldb_module_done(ac->req, NULL, NULL,
283 LDB_ERR_OPERATIONS_ERROR);
286 ac->search_res = talloc_steal(ac, ares);
289 case LDB_REPLY_REFERRAL:
296 ret = attr_handler2(ac);
297 if (ret != LDB_SUCCESS) {
298 return ldb_module_done(ac->req, NULL, NULL, ret);
306 static int oc_op_callback(struct ldb_request *req, struct ldb_reply *ares)
308 struct oc_context *ac;
309 struct ldb_context *ldb;
310 struct ldb_request *search_req;
311 struct ldb_dn *base_dn;
314 ac = talloc_get_type(req->context, struct oc_context);
315 ldb = ldb_module_get_ctx(ac->module);
318 return ldb_module_done(ac->req, NULL, NULL,
319 LDB_ERR_OPERATIONS_ERROR);
322 if (ares->type == LDB_REPLY_REFERRAL) {
323 return ldb_module_send_referral(ac->req, ares->referral);
326 if (ares->error != LDB_SUCCESS) {
327 return ldb_module_done(ac->req, ares->controls, ares->response,
331 if (ares->type != LDB_REPLY_DONE) {
333 return ldb_module_done(ac->req, NULL, NULL,
334 LDB_ERR_OPERATIONS_ERROR);
337 ac->search_res = NULL;
338 ac->mod_ares = talloc_steal(ac, ares);
340 /* This looks up all attributes of our just added/modified entry */
341 base_dn = ac->req->operation == LDB_ADD ? ac->req->op.add.message->dn
342 : ac->req->op.mod.message->dn;
343 ret = ldb_build_search_req(&search_req, ldb, ac, base_dn,
344 LDB_SCOPE_BASE, "(objectClass=*)",
346 get_search_callback, ac->req);
347 LDB_REQ_SET_LOCATION(search_req);
348 if (ret != LDB_SUCCESS) {
349 return ldb_module_done(ac->req, NULL, NULL, ret);
352 ret = ldb_request_add_control(search_req, LDB_CONTROL_SHOW_DELETED_OID,
354 if (ret != LDB_SUCCESS) {
355 return ldb_module_done(ac->req, NULL, NULL, ret);
358 ret = ldb_next_request(ac->module, search_req);
359 if (ret != LDB_SUCCESS) {
360 return ldb_module_done(ac->req, NULL, NULL, ret);
363 /* "ldb_module_done" isn't called here since we need to do additional
364 * checks. It is called at the end of "attr_handler2". */
368 static int objectclass_attrs_add(struct ldb_module *module,
369 struct ldb_request *req)
371 struct ldb_context *ldb;
372 struct oc_context *ac;
374 ldb = ldb_module_get_ctx(module);
376 ldb_debug(ldb, LDB_DEBUG_TRACE, "objectclass_attrs_add\n");
378 /* do not manipulate our control entries */
379 if (ldb_dn_is_special(req->op.add.message->dn)) {
380 return ldb_next_request(module, req);
383 ac = oc_init_context(module, req);
385 return ldb_operr(ldb);
388 /* without schema, there isn't much to do here */
389 if (ac->schema == NULL) {
391 return ldb_next_request(module, req);
394 return attr_handler(ac);
397 static int objectclass_attrs_modify(struct ldb_module *module,
398 struct ldb_request *req)
400 struct ldb_context *ldb;
401 struct oc_context *ac;
403 ldb = ldb_module_get_ctx(module);
405 ldb_debug(ldb, LDB_DEBUG_TRACE, "objectclass_attrs_modify\n");
407 /* do not manipulate our control entries */
408 if (ldb_dn_is_special(req->op.mod.message->dn)) {
409 return ldb_next_request(module, req);
412 ac = oc_init_context(module, req);
414 return ldb_operr(ldb);
417 /* without schema, there isn't much to do here */
418 if (ac->schema == NULL) {
420 return ldb_next_request(module, req);
423 return attr_handler(ac);
426 _PUBLIC_ const struct ldb_module_ops ldb_objectclass_attrs_module_ops = {
427 .name = "objectclass_attrs",
428 .add = objectclass_attrs_add,
429 .modify = objectclass_attrs_modify