4 Copyright (C) Simo Sorce 2005
6 ** NOTE! The following LGPL license applies to the ldb
7 ** library. This does NOT imply that all of Samba is released
10 This library is free software; you can redistribute it and/or
11 modify it under the terms of the GNU Lesser General Public
12 License as published by the Free Software Foundation; either
13 version 2 of the License, or (at your option) any later version.
15 This library is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public
21 License along with this library; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 * Component: ldb extended dn control module
30 * Description: this module builds a special dn
36 #include "ldb/include/ldb.h"
37 #include "ldb/include/ldb_errors.h"
38 #include "ldb/include/ldb_private.h"
39 #include "librpc/gen_ndr/ndr_misc.h"
40 #include "dsdb/samdb/samdb.h"
41 #include "libcli/security/security.h"
45 static BOOL is_attr_in_list(const char * const * attrs, const char *attr)
49 for (i = 0; attrs[i]; i++) {
50 if (strcasecmp(attrs[i], attr) == 0)
57 static char **copy_attrs(void *mem_ctx, const char * const * attrs)
62 for (num = 0; attrs[num]; num++);
64 new = talloc_array(mem_ctx, char *, num + 1);
65 if (!new) return NULL;
67 for(i = 0; i < num; i++) {
68 new[i] = talloc_strdup(new, attrs[i]);
79 static BOOL add_attrs(void *mem_ctx, char ***attrs, const char *attr)
84 for (num = 0; (*attrs)[num]; num++);
86 new = talloc_realloc(mem_ctx, *attrs, char *, num + 2);
87 if (!new) return False;
91 new[num] = talloc_strdup(new, attr);
92 if (!new[num]) return False;
99 static BOOL inject_extended_dn(struct ldb_message *msg,
104 const struct ldb_val *val;
111 dn = ldb_dn_linearize(msg, msg->dn);
115 /* retrieve object_guid */
116 guid = samdb_result_guid(msg, "objectGUID");
117 object_guid = GUID_string(msg, &guid);
122 ldb_msg_remove_attr(msg, "objectGUID");
124 /* retrieve object_sid */
126 sid = samdb_result_dom_sid(msg, msg, "objectSID");
128 object_sid = dom_sid_string(msg, sid);
133 ldb_msg_remove_attr(msg, "objectSID");
136 /* TODO: handle type */
141 new_dn = talloc_asprintf(msg, "<GUID=%s>;<SID=%s>;%s",
142 object_guid, object_sid, dn);
144 new_dn = talloc_asprintf(msg, "<GUID=%s>;%s",
155 msg->dn = ldb_dn_explode_or_special(msg, new_dn);
159 val = ldb_msg_find_ldb_val(msg, "distinguishedName");
161 ldb_msg_remove_attr(msg, "distinguishedName");
162 if (ldb_msg_add_steal_string(msg, "distinguishedName", new_dn))
170 static int extended_search(struct ldb_module *module, struct ldb_control *control, struct ldb_request *req)
172 struct ldb_result *extended_result;
173 struct ldb_control **saved_controls;
174 struct ldb_extended_dn_control *extended_ctrl;
176 const char * const *saved_attrs = NULL;
178 BOOL remove_guid = False;
179 BOOL remove_sid = False;
181 extended_ctrl = talloc_get_type(control->data, struct ldb_extended_dn_control);
182 if (!extended_ctrl) {
183 return LDB_ERR_PROTOCOL_ERROR;
186 /* save it locally and remove it from the list */
187 if (!save_controls(control, req, &saved_controls)) {
188 return LDB_ERR_OPERATIONS_ERROR;
191 /* check if attrs only is specified, in that case check wether we need to modify them */
192 if (req->op.search.attrs) {
193 if (! is_attr_in_list(req->op.search.attrs, "objectGUID")) {
196 if (! is_attr_in_list(req->op.search.attrs, "objectSID")) {
199 if (remove_guid || remove_sid) {
200 new_attrs = copy_attrs(req, req->op.search.attrs);
202 return LDB_ERR_OPERATIONS_ERROR;
204 saved_attrs = req->op.search.attrs;
207 if (!add_attrs(req, &new_attrs, "objectGUID"))
208 return LDB_ERR_OPERATIONS_ERROR;
211 if (!add_attrs(req, &new_attrs, "objectSID"))
212 return LDB_ERR_OPERATIONS_ERROR;
215 req->op.search.attrs = (const char * const *)new_attrs;
219 ret = ldb_next_request(module, req);
221 /* put request back into original shape */
222 /* TODO: build a new req and don't touch the original one */
224 if (req->controls) talloc_free(req->controls);
225 req->controls = saved_controls;
228 talloc_free(new_attrs);
229 req->op.search.attrs = saved_attrs;
232 if (ret != LDB_SUCCESS) {
236 extended_result = req->op.search.res;
238 for (i = 0; i < extended_result->count; i++) {
239 /* TODO: the following funtion updates only dn and
240 * distinguishedName. We still need to address other
241 * DN entries like objectCategory
243 if (!inject_extended_dn(extended_result->msgs[i],
245 remove_guid, remove_sid)) {
246 return LDB_ERR_OPERATIONS_ERROR;
254 struct extended_async_context {
256 struct ldb_module *module;
258 int (*up_callback)(struct ldb_context *, void *, struct ldb_async_result *);
261 const char * const *attrs;
267 static int extended_async_callback(struct ldb_context *ldb, void *context, struct ldb_async_result *ares)
269 struct extended_async_context *ac;
271 if (!context || !ares) {
272 ldb_set_errstring(ldb, talloc_asprintf(ldb, "NULL Context or Result in callback"));
276 ac = talloc_get_type(context, struct extended_async_context);
278 if (ares->type == LDB_REPLY_ENTRY) {
279 /* for each record returned post-process to add any derived
280 attributes that have been asked for */
281 if (!inject_extended_dn(ares->message, ac->extended_type, ac->remove_guid, ac->remove_sid)) {
286 return ac->up_callback(ldb, ac->up_context, ares);
290 return LDB_ERR_OPERATIONS_ERROR;
293 static int extended_search_async(struct ldb_module *module, struct ldb_request *req)
295 struct ldb_control *control;
296 struct ldb_extended_dn_control *extended_ctrl;
297 struct ldb_control **saved_controls;
298 struct extended_async_context *ac;
299 struct ldb_request *down_req;
303 /* check if there's an extended dn control */
304 control = get_control_from_list(req->controls, LDB_CONTROL_EXTENDED_DN_OID);
305 if (control == NULL) {
306 /* not found go on */
307 return ldb_next_request(module, req);
310 extended_ctrl = talloc_get_type(control->data, struct ldb_extended_dn_control);
311 if (!extended_ctrl) {
312 return LDB_ERR_PROTOCOL_ERROR;
315 ac = talloc(req, struct extended_async_context);
317 return LDB_ERR_OPERATIONS_ERROR;
321 ac->up_context = req->async.context;
322 ac->up_callback = req->async.callback;
323 ac->timeout = req->async.timeout;
324 ac->attrs = req->op.search.attrs;
325 ac->remove_guid = False;
326 ac->remove_sid = False;
327 ac->extended_type = extended_ctrl->type;
329 down_req = talloc_zero(req, struct ldb_request);
330 if (down_req == NULL) {
331 return LDB_ERR_OPERATIONS_ERROR;
334 down_req->operation = req->operation;
335 down_req->op.search.base = req->op.search.base;
336 down_req->op.search.scope = req->op.search.scope;
337 down_req->op.search.tree = req->op.search.tree;
339 /* check if attrs only is specified, in that case check wether we need to modify them */
340 if (req->op.search.attrs) {
341 if (! is_attr_in_list(req->op.search.attrs, "objectGUID")) {
342 ac->remove_guid = True;
344 if (! is_attr_in_list(req->op.search.attrs, "objectSID")) {
345 ac->remove_sid = True;
347 if (ac->remove_guid || ac->remove_sid) {
348 new_attrs = copy_attrs(down_req, req->op.search.attrs);
349 if (new_attrs == NULL)
350 return LDB_ERR_OPERATIONS_ERROR;
352 if (ac->remove_guid) {
353 if (!add_attrs(down_req, &new_attrs, "objectGUID"))
354 return LDB_ERR_OPERATIONS_ERROR;
356 if (ac->remove_sid) {
357 if (!add_attrs(down_req, &new_attrs, "objectSID"))
358 return LDB_ERR_OPERATIONS_ERROR;
361 down_req->op.search.attrs = (const char * const *)new_attrs;
365 down_req->controls = req->controls;
367 /* save it locally and remove it from the list */
368 /* we do not need to replace them later as we
369 * are keeping the original req intact */
370 if (!save_controls(control, down_req, &saved_controls)) {
371 return LDB_ERR_OPERATIONS_ERROR;
374 down_req->creds = req->creds;
376 down_req->async.context = ac;
377 down_req->async.callback = extended_async_callback;
378 down_req->async.timeout = req->async.timeout;
380 /* perform the search */
381 ret = ldb_next_request(module, down_req);
383 /* do not free down_req as the call results may be linked to it,
384 * it will be freed when the upper level request get freed */
385 if (ret == LDB_SUCCESS) {
386 req->async.handle = down_req->async.handle;
392 static int extended_request(struct ldb_module *module, struct ldb_request *req)
394 struct ldb_control *control;
396 /* check if there's an extended dn control */
397 control = get_control_from_list(req->controls, LDB_CONTROL_EXTENDED_DN_OID);
398 if (control == NULL) {
399 /* not found go on */
400 return ldb_next_request(module, req);
403 switch (req->operation) {
406 return extended_search(module, control, req);
409 return LDB_ERR_OPERATIONS_ERROR;
414 static int extended_init(struct ldb_module *module)
416 struct ldb_request *req;
419 req = talloc(module, struct ldb_request);
421 return LDB_ERR_OPERATIONS_ERROR;
424 req->operation = LDB_REQ_REGISTER;
425 req->op.reg.oid = LDB_CONTROL_EXTENDED_DN_OID;
426 req->controls = NULL;
428 ret = ldb_request(module->ldb, req);
429 if (ret != LDB_SUCCESS) {
430 ldb_debug(module->ldb, LDB_DEBUG_ERROR, "extended_dn: Unable to register control with rootdse!\n");
432 return LDB_ERR_OPERATIONS_ERROR;
436 return ldb_next_init(module);
439 static const struct ldb_module_ops extended_dn_ops = {
440 .name = "extended_dn",
441 .search = extended_search_async,
442 .request = extended_request,
443 .init_context = extended_init
446 int ldb_extended_dn_init(void)
448 return ldb_register_module(&extended_dn_ops);