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);
151 ret = ldb_build_mod_req(&child_req, ldb, ac,
152 msg, ac->req->controls,
153 ac, oc_op_callback, ac->req);
155 if (ret != LDB_SUCCESS) {
159 return ldb_next_request(ac->module, child_req);
163 these are attributes which are left over from old ways of doing
164 things in ldb, and are harmless
166 static const char *harmless_attrs[] = { "parentGUID", NULL };
168 static int attr_handler2(struct oc_context *ac)
170 struct ldb_context *ldb;
171 struct ldb_message_element *oc_element;
172 struct ldb_message *msg;
173 const char **must_contain, **may_contain, **found_must_contain;
174 const struct dsdb_attribute *attr;
178 ldb = ldb_module_get_ctx(ac->module);
180 if (ac->search_res == NULL) {
181 return ldb_operr(ldb);
184 /* We rely here on the preceding "objectclass" LDB module which did
185 * already fix up the objectclass list (inheritance, order...). */
186 oc_element = ldb_msg_find_element(ac->search_res->message,
188 if (oc_element == NULL) {
189 return ldb_operr(ldb);
192 must_contain = dsdb_full_attribute_list(ac, ac->schema, oc_element,
193 DSDB_SCHEMA_ALL_MUST);
194 may_contain = dsdb_full_attribute_list(ac, ac->schema, oc_element,
195 DSDB_SCHEMA_ALL_MAY);
196 found_must_contain = const_str_list(str_list_copy(ac, must_contain));
197 if ((must_contain == NULL) || (may_contain == NULL)
198 || (found_must_contain == NULL)) {
199 return ldb_operr(ldb);
202 /* Check if all specified attributes are valid in the given
203 * objectclasses and if they meet additional schema restrictions. */
204 msg = ac->search_res->message;
205 for (i = 0; i < msg->num_elements; i++) {
206 attr = dsdb_attribute_by_lDAPDisplayName(ac->schema,
207 msg->elements[i].name);
209 return ldb_operr(ldb);
212 /* Check if they're single-valued if this is requested */
213 if ((msg->elements[i].num_values > 1) && (attr->isSingleValued)) {
214 ldb_asprintf_errstring(ldb, "objectclass_attrs: attribute '%s' on entry '%s' is single-valued!",
215 msg->elements[i].name,
216 ldb_dn_get_linearized(msg->dn));
217 if (ac->req->operation == LDB_ADD) {
218 return LDB_ERR_CONSTRAINT_VIOLATION;
220 return LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS;
224 /* We can use "str_list_check" with "strcmp" here since the
225 * attribute informations from the schema are always equal
227 found = str_list_check(must_contain, attr->lDAPDisplayName);
229 str_list_remove(found_must_contain, attr->lDAPDisplayName);
231 found = str_list_check(may_contain, attr->lDAPDisplayName);
234 found = str_list_check(harmless_attrs, attr->lDAPDisplayName);
237 ldb_asprintf_errstring(ldb, "objectclass_attrs: attribute '%s' on entry '%s' does not exist in the specified objectclasses!",
238 msg->elements[i].name,
239 ldb_dn_get_linearized(msg->dn));
240 return LDB_ERR_OBJECT_CLASS_VIOLATION;
244 if (found_must_contain[0] != NULL) {
245 ldb_asprintf_errstring(ldb, "objectclass_attrs: at least one mandatory attribute ('%s') on entry '%s' wasn't specified!",
246 found_must_contain[0],
247 ldb_dn_get_linearized(msg->dn));
248 return LDB_ERR_OBJECT_CLASS_VIOLATION;
251 return ldb_module_done(ac->req, ac->mod_ares->controls,
252 ac->mod_ares->response, LDB_SUCCESS);
255 static int get_search_callback(struct ldb_request *req, struct ldb_reply *ares)
257 struct ldb_context *ldb;
258 struct oc_context *ac;
261 ac = talloc_get_type(req->context, struct oc_context);
262 ldb = ldb_module_get_ctx(ac->module);
265 return ldb_module_done(ac->req, NULL, NULL,
266 LDB_ERR_OPERATIONS_ERROR);
268 if (ares->error != LDB_SUCCESS) {
269 return ldb_module_done(ac->req, ares->controls,
270 ares->response, ares->error);
273 ldb_reset_err_string(ldb);
275 switch (ares->type) {
276 case LDB_REPLY_ENTRY:
277 if (ac->search_res != NULL) {
278 ldb_set_errstring(ldb, "Too many results");
280 return ldb_module_done(ac->req, NULL, NULL,
281 LDB_ERR_OPERATIONS_ERROR);
284 ac->search_res = talloc_steal(ac, ares);
287 case LDB_REPLY_REFERRAL:
294 ret = attr_handler2(ac);
295 if (ret != LDB_SUCCESS) {
296 return ldb_module_done(ac->req, NULL, NULL, ret);
304 static int oc_op_callback(struct ldb_request *req, struct ldb_reply *ares)
306 struct oc_context *ac;
307 struct ldb_context *ldb;
308 struct ldb_request *search_req;
309 struct ldb_dn *base_dn;
312 ac = talloc_get_type(req->context, struct oc_context);
313 ldb = ldb_module_get_ctx(ac->module);
316 return ldb_module_done(ac->req, NULL, NULL,
317 LDB_ERR_OPERATIONS_ERROR);
320 if (ares->type == LDB_REPLY_REFERRAL) {
321 return ldb_module_send_referral(ac->req, ares->referral);
324 if (ares->error != LDB_SUCCESS) {
325 return ldb_module_done(ac->req, ares->controls, ares->response,
329 if (ares->type != LDB_REPLY_DONE) {
331 return ldb_module_done(ac->req, NULL, NULL,
332 LDB_ERR_OPERATIONS_ERROR);
335 ac->search_res = NULL;
336 ac->mod_ares = talloc_steal(ac, ares);
338 /* This looks up all attributes of our just added/modified entry */
339 base_dn = ac->req->operation == LDB_ADD ? ac->req->op.add.message->dn
340 : ac->req->op.mod.message->dn;
341 ret = ldb_build_search_req(&search_req, ldb, ac, base_dn,
342 LDB_SCOPE_BASE, "(objectClass=*)",
344 get_search_callback, ac->req);
345 if (ret != LDB_SUCCESS) {
346 return ldb_module_done(ac->req, NULL, NULL, ret);
349 ret = ldb_request_add_control(search_req, LDB_CONTROL_SHOW_DELETED_OID,
351 if (ret != LDB_SUCCESS) {
352 return ldb_module_done(ac->req, NULL, NULL, ret);
355 ret = ldb_next_request(ac->module, search_req);
356 if (ret != LDB_SUCCESS) {
357 return ldb_module_done(ac->req, NULL, NULL, ret);
360 /* "ldb_module_done" isn't called here since we need to do additional
361 * checks. It is called at the end of "attr_handler2". */
365 static int objectclass_attrs_add(struct ldb_module *module,
366 struct ldb_request *req)
368 struct ldb_context *ldb;
369 struct oc_context *ac;
371 ldb = ldb_module_get_ctx(module);
373 ldb_debug(ldb, LDB_DEBUG_TRACE, "objectclass_attrs_add\n");
375 /* do not manipulate our control entries */
376 if (ldb_dn_is_special(req->op.add.message->dn)) {
377 return ldb_next_request(module, req);
380 ac = oc_init_context(module, req);
382 return ldb_operr(ldb);
385 /* without schema, there isn't much to do here */
386 if (ac->schema == NULL) {
388 return ldb_next_request(module, req);
391 return attr_handler(ac);
394 static int objectclass_attrs_modify(struct ldb_module *module,
395 struct ldb_request *req)
397 struct ldb_context *ldb;
398 struct oc_context *ac;
400 ldb = ldb_module_get_ctx(module);
402 ldb_debug(ldb, LDB_DEBUG_TRACE, "objectclass_attrs_modify\n");
404 /* do not manipulate our control entries */
405 if (ldb_dn_is_special(req->op.mod.message->dn)) {
406 return ldb_next_request(module, req);
409 ac = oc_init_context(module, req);
411 return ldb_operr(ldb);
414 /* without schema, there isn't much to do here */
415 if (ac->schema == NULL) {
417 return ldb_next_request(module, req);
420 return attr_handler(ac);
423 _PUBLIC_ const struct ldb_module_ops ldb_objectclass_attrs_module_ops = {
424 .name = "objectclass_attrs",
425 .add = objectclass_attrs_add,
426 .modify = objectclass_attrs_modify