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s4-dsdb: simplify migration of old-style seqence numbers to metadata.tdb
[Samba.git] / source4 / dsdb / samdb / ldb_modules / extended_dn_out.c
blob8e28ec7b78cf400dd79f112441c54d38f6dba157
1 /*
2 ldb database library
3
4 Copyright (C) Simo Sorce 2005-2008
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2007-2009
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 /*
22 * Name: ldb
23 *
24 * Component: ldb extended dn control module
25 *
26 * Description: this module builds a special dn for returned search
27 * results, and fixes some other aspects of the result (returned case issues)
28 * values.
29 *
30 * Authors: Simo Sorce
31 * Andrew Bartlett
32 */
33
34 #include "includes.h"
35 #include <ldb.h>
36 #include <ldb_errors.h>
37 #include <ldb_module.h>
38 #include "libcli/security/security.h"
39 #include "librpc/gen_ndr/ndr_misc.h"
40 #include "librpc/gen_ndr/ndr_security.h"
41 #include "librpc/ndr/libndr.h"
42 #include "dsdb/samdb/samdb.h"
43 #include "dsdb/samdb/ldb_modules/util.h"
44
45 struct extended_dn_out_private {
46 bool dereference;
47 bool normalise;
48 struct dsdb_openldap_dereference_control *dereference_control;
49 const char **attrs;
50 };
51
52 /* Do the lazy init of the derererence control */
53
54 static int extended_dn_out_dereference_setup_control(struct ldb_context *ldb, struct extended_dn_out_private *p)
55 {
56 const struct dsdb_schema *schema;
57 struct dsdb_openldap_dereference_control *dereference_control;
58 struct dsdb_attribute *cur;
59
60 unsigned int i = 0;
61 if (p->dereference_control) {
62 return LDB_SUCCESS;
63 }
64
65 schema = dsdb_get_schema(ldb, p);
66 if (!schema) {
67 /* No schema on this DB (yet) */
68 return LDB_SUCCESS;
69 }
70
71 p->dereference_control = dereference_control
72 = talloc_zero(p, struct dsdb_openldap_dereference_control);
73
74 if (!p->dereference_control) {
75 return ldb_oom(ldb);
76 }
77
78 for (cur = schema->attributes; cur; cur = cur->next) {
79 if (cur->dn_format != DSDB_NORMAL_DN) {
80 continue;
81 }
82 dereference_control->dereference
83 = talloc_realloc(p, dereference_control->dereference,
84 struct dsdb_openldap_dereference *, i + 2);
85 if (!dereference_control) {
86 return ldb_oom(ldb);
87 }
88 dereference_control->dereference[i] = talloc(dereference_control->dereference,
89 struct dsdb_openldap_dereference);
90 if (!dereference_control->dereference[i]) {
91 return ldb_oom(ldb);
92 }
93 dereference_control->dereference[i]->source_attribute = cur->lDAPDisplayName;
94 dereference_control->dereference[i]->dereference_attribute = p->attrs;
95 i++;
96 dereference_control->dereference[i] = NULL;
97 }
98 return LDB_SUCCESS;
99 }
100
101 static char **copy_attrs(void *mem_ctx, const char * const * attrs)
102 {
103 char **nattrs;
104 unsigned int i, num;
105
106 for (num = 0; attrs[num]; num++);
107
108 nattrs = talloc_array(mem_ctx, char *, num + 1);
109 if (!nattrs) return NULL;
110
111 for(i = 0; i < num; i++) {
112 nattrs[i] = talloc_strdup(nattrs, attrs[i]);
113 if (!nattrs[i]) {
114 talloc_free(nattrs);
115 return NULL;
116 }
117 }
118 nattrs[i] = NULL;
119
120 return nattrs;
121 }
122
123 static bool add_attrs(void *mem_ctx, char ***attrs, const char *attr)
124 {
125 char **nattrs;
126 unsigned int num;
127
128 for (num = 0; (*attrs)[num]; num++);
129
130 nattrs = talloc_realloc(mem_ctx, *attrs, char *, num + 2);
131 if (!nattrs) return false;
132
133 *attrs = nattrs;
134
135 nattrs[num] = talloc_strdup(nattrs, attr);
136 if (!nattrs[num]) return false;
137
138 nattrs[num + 1] = NULL;
139
140 return true;
141 }
142
143 /* Fix the DN so that the relative attribute names are in upper case so that the DN:
144 cn=Adminstrator,cn=users,dc=samba,dc=example,dc=com becomes
145 CN=Adminstrator,CN=users,DC=samba,DC=example,DC=com
146 */
147 static int fix_dn(struct ldb_context *ldb, struct ldb_dn *dn)
148 {
149 int i, ret;
150 char *upper_rdn_attr;
151
152 for (i=0; i < ldb_dn_get_comp_num(dn); i++) {
153 /* We need the attribute name in upper case */
154 upper_rdn_attr = strupper_talloc(dn,
155 ldb_dn_get_component_name(dn, i));
156 if (!upper_rdn_attr) {
157 return ldb_oom(ldb);
158 }
159
160 /* And replace it with CN=foo (we need the attribute in upper case */
161 ret = ldb_dn_set_component(dn, i, upper_rdn_attr,
162 *ldb_dn_get_component_val(dn, i));
163 talloc_free(upper_rdn_attr);
164 if (ret != LDB_SUCCESS) {
165 return ret;
166 }
167 }
168 return LDB_SUCCESS;
169 }
170
171
172 /* Inject the extended DN components, so the DN cn=Adminstrator,cn=users,dc=samba,dc=example,dc=com becomes
173 <GUID=541203ae-f7d6-47ef-8390-bfcf019f9583>;<SID=S-1-5-21-4177067393-1453636373-93818737-500>;cn=Adminstrator,cn=users,dc=samba,dc=example,dc=com */
174
175 static int inject_extended_dn_out(struct ldb_reply *ares,
176 struct ldb_context *ldb,
177 int type,
178 bool remove_guid,
179 bool remove_sid)
180 {
181 int ret;
182 const DATA_BLOB *guid_blob;
183 const DATA_BLOB *sid_blob;
184
185 guid_blob = ldb_msg_find_ldb_val(ares->message, "objectGUID");
186 sid_blob = ldb_msg_find_ldb_val(ares->message, "objectSid");
187
188 if (!guid_blob) {
189 ldb_set_errstring(ldb, "Did not find objectGUID to inject into extended DN");
190 return LDB_ERR_OPERATIONS_ERROR;
191 }
192
193 ret = ldb_dn_set_extended_component(ares->message->dn, "GUID", guid_blob);
194 if (ret != LDB_SUCCESS) {
195 return ret;
196 }
197 if (sid_blob) {
198 ret = ldb_dn_set_extended_component(ares->message->dn, "SID", sid_blob);
199 if (ret != LDB_SUCCESS) {
200 return ret;
201 }
202 }
203
204 if (remove_guid) {
205 ldb_msg_remove_attr(ares->message, "objectGUID");
206 }
207
208 if (sid_blob && remove_sid) {
209 ldb_msg_remove_attr(ares->message, "objectSid");
210 }
211
212 return LDB_SUCCESS;
213 }
214
215 static int handle_dereference_openldap(struct ldb_dn *dn,
216 struct dsdb_openldap_dereference_result **dereference_attrs,
217 const char *attr, const DATA_BLOB *val)
218 {
219 const struct ldb_val *entryUUIDblob, *sid_blob;
220 struct ldb_message fake_msg; /* easier to use routines that expect an ldb_message */
221 unsigned int j;
222
223 fake_msg.num_elements = 0;
224
225 /* Look for this attribute in the returned control */
226 for (j = 0; dereference_attrs && dereference_attrs[j]; j++) {
227 struct ldb_val source_dn = data_blob_string_const(dereference_attrs[j]->dereferenced_dn);
228 if (ldb_attr_cmp(dereference_attrs[j]->source_attribute, attr) == 0
229 && data_blob_cmp(&source_dn, val) == 0) {
230 fake_msg.num_elements = dereference_attrs[j]->num_attributes;
231 fake_msg.elements = dereference_attrs[j]->attributes;
232 break;
233 }
234 }
235 if (!fake_msg.num_elements) {
236 return LDB_SUCCESS;
237 }
238 /* Look for an OpenLDAP entryUUID */
239
240 entryUUIDblob = ldb_msg_find_ldb_val(&fake_msg, "entryUUID");
241 if (entryUUIDblob) {
242 NTSTATUS status;
243 struct ldb_val guid_blob;
244 struct GUID guid;
245
246 status = GUID_from_data_blob(entryUUIDblob, &guid);
247
248 if (!NT_STATUS_IS_OK(status)) {
249 return LDB_ERR_INVALID_DN_SYNTAX;
250 }
251 status = GUID_to_ndr_blob(&guid, dn, &guid_blob);
252 if (!NT_STATUS_IS_OK(status)) {
253 return LDB_ERR_INVALID_DN_SYNTAX;
254 }
255
256 ldb_dn_set_extended_component(dn, "GUID", &guid_blob);
257 }
258
259 sid_blob = ldb_msg_find_ldb_val(&fake_msg, "objectSid");
260
261 /* Look for the objectSid */
262 if (sid_blob) {
263 ldb_dn_set_extended_component(dn, "SID", sid_blob);
264 }
265 return LDB_SUCCESS;
266 }
267
268 static int handle_dereference_fds(struct ldb_dn *dn,
269 struct dsdb_openldap_dereference_result **dereference_attrs,
270 const char *attr, const DATA_BLOB *val)
271 {
272 const struct ldb_val *nsUniqueIdBlob, *sidBlob;
273 struct ldb_message fake_msg; /* easier to use routines that expect an ldb_message */
274 unsigned int j;
275
276 fake_msg.num_elements = 0;
277
278 /* Look for this attribute in the returned control */
279 for (j = 0; dereference_attrs && dereference_attrs[j]; j++) {
280 struct ldb_val source_dn = data_blob_string_const(dereference_attrs[j]->dereferenced_dn);
281 if (ldb_attr_cmp(dereference_attrs[j]->source_attribute, attr) == 0
282 && data_blob_cmp(&source_dn, val) == 0) {
283 fake_msg.num_elements = dereference_attrs[j]->num_attributes;
284 fake_msg.elements = dereference_attrs[j]->attributes;
285 break;
286 }
287 }
288 if (!fake_msg.num_elements) {
289 return LDB_SUCCESS;
290 }
291
292 /* Look for the nsUniqueId */
293
294 nsUniqueIdBlob = ldb_msg_find_ldb_val(&fake_msg, "nsUniqueId");
295 if (nsUniqueIdBlob) {
296 NTSTATUS status;
297 struct ldb_val guid_blob;
298 struct GUID guid;
299
300 status = NS_GUID_from_string((char *)nsUniqueIdBlob->data, &guid);
301
302 if (!NT_STATUS_IS_OK(status)) {
303 return LDB_ERR_INVALID_DN_SYNTAX;
304 }
305 status = GUID_to_ndr_blob(&guid, dn, &guid_blob);
306 if (!NT_STATUS_IS_OK(status)) {
307 return LDB_ERR_INVALID_DN_SYNTAX;
308 }
309
310 ldb_dn_set_extended_component(dn, "GUID", &guid_blob);
311 }
312
313 /* Look for the objectSid */
314
315 sidBlob = ldb_msg_find_ldb_val(&fake_msg, "sambaSID");
316 if (sidBlob) {
317 enum ndr_err_code ndr_err;
318
319 struct ldb_val sid_blob;
320 struct dom_sid *sid;
321
322 sid = dom_sid_parse_length(NULL, sidBlob);
323
324 if (sid == NULL) {
325 return LDB_ERR_INVALID_DN_SYNTAX;
326 }
327
328 ndr_err = ndr_push_struct_blob(&sid_blob, NULL, sid,
329 (ndr_push_flags_fn_t)ndr_push_dom_sid);
330 talloc_free(sid);
331 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
332 return LDB_ERR_INVALID_DN_SYNTAX;
333 }
334
335 ldb_dn_set_extended_component(dn, "SID", &sid_blob);
336 }
337 return LDB_SUCCESS;
338 }
339
340 /* search */
341 struct extended_search_context {
342 struct ldb_module *module;
343 const struct dsdb_schema *schema;
344 struct ldb_request *req;
345 bool inject;
346 bool remove_guid;
347 bool remove_sid;
348 int extended_type;
349 };
350
351
352 /*
353 fix one-way links to have the right string DN, to cope with
354 renames of the target
355 */
356 static int fix_one_way_link(struct extended_search_context *ac, struct ldb_dn *dn,
357 bool is_deleted_objects, bool *remove_value)
358 {
359 struct GUID guid;
360 NTSTATUS status;
361 int ret;
362 struct ldb_dn *real_dn;
363 uint32_t search_flags;
364 TALLOC_CTX *tmp_ctx = talloc_new(ac);
365 const char *attrs[] = { NULL };
366 struct ldb_result *res;
367
368 (*remove_value) = false;
369
370 status = dsdb_get_extended_dn_guid(dn, &guid, "GUID");
371 if (!NT_STATUS_IS_OK(status)) {
372 /* this is a strange DN that doesn't have a GUID! just
373 return the current DN string?? */
374 talloc_free(tmp_ctx);
375 return LDB_SUCCESS;
376 }
377
378 search_flags = DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SEARCH_ALL_PARTITIONS | DSDB_SEARCH_ONE_ONLY;
379
380 if (ldb_request_get_control(ac->req, LDB_CONTROL_SHOW_DEACTIVATED_LINK_OID) ||
381 is_deleted_objects) {
382 search_flags |= DSDB_SEARCH_SHOW_DELETED;
383 }
384
385 ret = dsdb_module_search(ac->module, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE, attrs,
386 search_flags, ac->req, "objectguid=%s", GUID_string(tmp_ctx, &guid));
387 if (ret != LDB_SUCCESS || res->count != 1) {
388 /* if we can't resolve this GUID, then we don't
389 display the link. This could be a link to a NC that we don't
390 have, or it could be a link to a deleted object
391 */
392 (*remove_value) = true;
393 talloc_free(tmp_ctx);
394 return LDB_SUCCESS;
395 }
396 real_dn = res->msgs[0]->dn;
397
398 if (strcmp(ldb_dn_get_linearized(dn), ldb_dn_get_linearized(real_dn)) == 0) {
399 /* its already correct */
400 talloc_free(tmp_ctx);
401 return LDB_SUCCESS;
402 }
403
404 /* fix the DN by replacing its components with those from the
405 * real DN
406 */
407 if (!ldb_dn_replace_components(dn, real_dn)) {
408 talloc_free(tmp_ctx);
409 return ldb_operr(ldb_module_get_ctx(ac->module));
410 }
411 talloc_free(tmp_ctx);
412
413 return LDB_SUCCESS;
414 }
415
416
417 /*
418 this is called to post-process the results from the search
419 */
420 static int extended_callback(struct ldb_request *req, struct ldb_reply *ares,
421 int (*handle_dereference)(struct ldb_dn *dn,
422 struct dsdb_openldap_dereference_result **dereference_attrs,
423 const char *attr, const DATA_BLOB *val))
424 {
425 struct extended_search_context *ac;
426 struct ldb_control *control;
427 struct dsdb_openldap_dereference_result_control *dereference_control = NULL;
428 int ret;
429 unsigned int i, j;
430 struct ldb_message *msg;
431 struct extended_dn_out_private *p;
432 struct ldb_context *ldb;
433 bool have_reveal_control=false, checked_reveal_control=false;
434
435 ac = talloc_get_type(req->context, struct extended_search_context);
436 p = talloc_get_type(ldb_module_get_private(ac->module), struct extended_dn_out_private);
437 ldb = ldb_module_get_ctx(ac->module);
438 if (!ares) {
439 return ldb_module_done(ac->req, NULL, NULL,
440 LDB_ERR_OPERATIONS_ERROR);
441 }
442 if (ares->error != LDB_SUCCESS) {
443 return ldb_module_done(ac->req, ares->controls,
444 ares->response, ares->error);
445 }
446
447 msg = ares->message;
448
449 switch (ares->type) {
450 case LDB_REPLY_REFERRAL:
451 return ldb_module_send_referral(ac->req, ares->referral);
452
453 case LDB_REPLY_DONE:
454 return ldb_module_done(ac->req, ares->controls,
455 ares->response, LDB_SUCCESS);
456 case LDB_REPLY_ENTRY:
457 break;
458 }
459
460 if (p && p->normalise) {
461 ret = fix_dn(ldb, ares->message->dn);
462 if (ret != LDB_SUCCESS) {
463 return ldb_module_done(ac->req, NULL, NULL, ret);
464 }
465 }
466
467 if (ac->inject) {
468 /* for each record returned post-process to add any derived
469 attributes that have been asked for */
470 ret = inject_extended_dn_out(ares, ldb,
471 ac->extended_type, ac->remove_guid,
472 ac->remove_sid);
473 if (ret != LDB_SUCCESS) {
474 return ldb_module_done(ac->req, NULL, NULL, ret);
475 }
476 }
477
478 if ((p && p->normalise) || ac->inject) {
479 const struct ldb_val *val = ldb_msg_find_ldb_val(ares->message, "distinguishedName");
480 if (val) {
481 ldb_msg_remove_attr(ares->message, "distinguishedName");
482 if (ac->inject) {
483 ret = ldb_msg_add_steal_string(ares->message, "distinguishedName",
484 ldb_dn_get_extended_linearized(ares->message, ares->message->dn, ac->extended_type));
485 } else {
486 ret = ldb_msg_add_linearized_dn(ares->message,
487 "distinguishedName",
488 ares->message->dn);
489 }
490 if (ret != LDB_SUCCESS) {
491 return ldb_oom(ldb);
492 }
493 }
494 }
495
496 if (p && p->dereference) {
497 control = ldb_reply_get_control(ares, DSDB_OPENLDAP_DEREFERENCE_CONTROL);
498
499 if (control && control->data) {
500 dereference_control = talloc_get_type(control->data, struct dsdb_openldap_dereference_result_control);
501 }
502 }
503
504 /* Walk the returned elements (but only if we have a schema to
505 * interpret the list with) */
506 for (i = 0; ac->schema && i < msg->num_elements; i++) {
507 bool make_extended_dn;
508 const struct dsdb_attribute *attribute;
509
510 attribute = dsdb_attribute_by_lDAPDisplayName(ac->schema, msg->elements[i].name);
511 if (!attribute) {
512 continue;
513 }
514
515 if (p->normalise) {
516 /* If we are also in 'normalise' mode, then
517 * fix the attribute names to be in the
518 * correct case */
519 msg->elements[i].name = talloc_strdup(msg->elements, attribute->lDAPDisplayName);
520 if (!msg->elements[i].name) {
521 ldb_oom(ldb);
522 return ldb_module_done(ac->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
523 }
524 }
525
526 /* distinguishedName has been dealt with above */
527 if (ldb_attr_cmp(msg->elements[i].name, "distinguishedName") == 0) {
528 continue;
529 }
530
531 /* Look to see if this attributeSyntax is a DN */
532 if (attribute->dn_format == DSDB_INVALID_DN) {
533 continue;
534 }
535
536 make_extended_dn = ac->inject;
537
538 /* Always show plain DN in case of Object(OR-Name) syntax */
539 if (make_extended_dn) {
540 make_extended_dn = (strcmp(attribute->syntax->ldap_oid, DSDB_SYNTAX_OR_NAME) != 0);
541 }
542
543 for (j = 0; j < msg->elements[i].num_values; j++) {
544 const char *dn_str;
545 struct ldb_dn *dn;
546 struct dsdb_dn *dsdb_dn = NULL;
547 struct ldb_val *plain_dn = &msg->elements[i].values[j];
548 bool is_deleted_objects = false;
549
550 if (!checked_reveal_control) {
551 have_reveal_control =
552 ldb_request_get_control(req, LDB_CONTROL_REVEAL_INTERNALS) != NULL;
553 checked_reveal_control = true;
554 }
555
556 /* this is a fast method for detecting deleted
557 linked attributes, working on the unparsed
558 ldb_val */
559 if (dsdb_dn_is_deleted_val(plain_dn) && !have_reveal_control) {
560 /* it's a deleted linked attribute,
561 and we don't have the reveal control */
562 memmove(&msg->elements[i].values[j],
563 &msg->elements[i].values[j+1],
564 (msg->elements[i].num_values-(j+1))*sizeof(struct ldb_val));
565 msg->elements[i].num_values--;
566 j--;
567 continue;
568 }
569
570
571 dsdb_dn = dsdb_dn_parse(msg, ldb, plain_dn, attribute->syntax->ldap_oid);
572
573 if (!dsdb_dn || !ldb_dn_validate(dsdb_dn->dn)) {
574 ldb_asprintf_errstring(ldb,
575 "could not parse %.*s in %s on %s as a %s DN",
576 (int)plain_dn->length, plain_dn->data,
577 msg->elements[i].name, ldb_dn_get_linearized(msg->dn),
578 attribute->syntax->ldap_oid);
579 talloc_free(dsdb_dn);
580 return ldb_module_done(ac->req, NULL, NULL, LDB_ERR_INVALID_DN_SYNTAX);
581 }
582 dn = dsdb_dn->dn;
583
584 /* we need to know if this is a link to the
585 deleted objects container for fixing one way
586 links */
587 if (dsdb_dn->extra_part.length == 16) {
588 char *hex_string = data_blob_hex_string_upper(req, &dsdb_dn->extra_part);
589 if (hex_string && strcmp(hex_string, DS_GUID_DELETED_OBJECTS_CONTAINER) == 0) {
590 is_deleted_objects = true;
591 }
592 talloc_free(hex_string);
593 }
594
595 /* don't let users see the internal extended
596 GUID components */
597 if (!have_reveal_control) {
598 const char *accept[] = { "GUID", "SID", NULL };
599 ldb_dn_extended_filter(dn, accept);
600 }
601
602 if (p->normalise) {
603 ret = fix_dn(ldb, dn);
604 if (ret != LDB_SUCCESS) {
605 talloc_free(dsdb_dn);
606 return ldb_module_done(ac->req, NULL, NULL, ret);
607 }
608 }
609
610 /* If we are running in dereference mode (such
611 * as against OpenLDAP) then the DN in the msg
612 * above does not contain the extended values,
613 * and we need to look in the dereference
614 * result */
615
616 /* Look for this value in the attribute */
617
618 if (dereference_control) {
619 ret = handle_dereference(dn,
620 dereference_control->attributes,
621 msg->elements[i].name,
622 &msg->elements[i].values[j]);
623 if (ret != LDB_SUCCESS) {
624 talloc_free(dsdb_dn);
625 return ldb_module_done(ac->req, NULL, NULL, ret);
626 }
627 }
628
629 /* note that we don't fixup objectCategory as
630 it should not be possible to move
631 objectCategory elements in the schema */
632 if (attribute->one_way_link &&
633 strcasecmp(attribute->lDAPDisplayName, "objectCategory") != 0) {
634 bool remove_value;
635 ret = fix_one_way_link(ac, dn, is_deleted_objects, &remove_value);
636 if (ret != LDB_SUCCESS) {
637 talloc_free(dsdb_dn);
638 return ldb_module_done(ac->req, NULL, NULL, ret);
639 }
640 if (remove_value &&
641 !ldb_request_get_control(req, LDB_CONTROL_REVEAL_INTERNALS)) {
642 /* we show these with REVEAL
643 to allow dbcheck to find and
644 cleanup these orphaned links */
645 memmove(&msg->elements[i].values[j],
646 &msg->elements[i].values[j+1],
647 (msg->elements[i].num_values-(j+1))*sizeof(struct ldb_val));
648 msg->elements[i].num_values--;
649 j--;
650 continue;
651 }
652 }
653
654 if (make_extended_dn) {
655 dn_str = dsdb_dn_get_extended_linearized(msg->elements[i].values,
656 dsdb_dn, ac->extended_type);
657 } else {
658 dn_str = dsdb_dn_get_linearized(msg->elements[i].values,
659 dsdb_dn);
660 }
661
662 if (!dn_str) {
663 ldb_oom(ldb);
664 talloc_free(dsdb_dn);
665 return ldb_module_done(ac->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
666 }
667 msg->elements[i].values[j] = data_blob_string_const(dn_str);
668 talloc_free(dsdb_dn);
669 }
670 if (msg->elements[i].num_values == 0) {
671 /* we've deleted all of the values from this
672 * element - remove the element */
673 memmove(&msg->elements[i],
674 &msg->elements[i+1],
675 (msg->num_elements-(i+1))*sizeof(struct ldb_message_element));
676 msg->num_elements--;
677 i--;
678 }
679 }
680 return ldb_module_send_entry(ac->req, msg, ares->controls);
681 }
682
683 static int extended_callback_ldb(struct ldb_request *req, struct ldb_reply *ares)
684 {
685 return extended_callback(req, ares, NULL);
686 }
687
688 static int extended_callback_openldap(struct ldb_request *req, struct ldb_reply *ares)
689 {
690 return extended_callback(req, ares, handle_dereference_openldap);
691 }
692
693 static int extended_callback_fds(struct ldb_request *req, struct ldb_reply *ares)
694 {
695 return extended_callback(req, ares, handle_dereference_fds);
696 }
697
698 static int extended_dn_out_search(struct ldb_module *module, struct ldb_request *req,
699 int (*callback)(struct ldb_request *req, struct ldb_reply *ares))
700 {
701 struct ldb_control *control;
702 struct ldb_control *storage_format_control;
703 struct ldb_extended_dn_control *extended_ctrl = NULL;
704 struct extended_search_context *ac;
705 struct ldb_request *down_req;
706 char **new_attrs;
707 const char * const *const_attrs;
708 struct ldb_context *ldb = ldb_module_get_ctx(module);
709 int ret;
710 bool critical;
711
712 struct extended_dn_out_private *p = talloc_get_type(ldb_module_get_private(module), struct extended_dn_out_private);
713
714 /* The schema manipulation does not apply to special DNs */
715 if (ldb_dn_is_special(req->op.search.base)) {
716 return ldb_next_request(module, req);
717 }
718
719 /* check if there's an extended dn control */
720 control = ldb_request_get_control(req, LDB_CONTROL_EXTENDED_DN_OID);
721 if (control && control->data) {
722 extended_ctrl = talloc_get_type(control->data, struct ldb_extended_dn_control);
723 if (!extended_ctrl) {
724 return LDB_ERR_PROTOCOL_ERROR;
725 }
726 }
727
728 /* Look to see if, as we are in 'store DN+GUID+SID' mode, the
729 * client is after the storage format (to fill in linked
730 * attributes) */
731 storage_format_control = ldb_request_get_control(req, DSDB_CONTROL_DN_STORAGE_FORMAT_OID);
732 if (!control && storage_format_control && storage_format_control->data) {
733 extended_ctrl = talloc_get_type(storage_format_control->data, struct ldb_extended_dn_control);
734 if (!extended_ctrl) {
735 ldb_set_errstring(ldb, "extended_dn_out: extended_ctrl was of the wrong data type");
736 return LDB_ERR_PROTOCOL_ERROR;
737 }
738 }
739
740 ac = talloc_zero(req, struct extended_search_context);
741 if (ac == NULL) {
742 return ldb_oom(ldb);
743 }
744
745 ac->module = module;
746 ac->schema = dsdb_get_schema(ldb, ac);
747 ac->req = req;
748 ac->inject = false;
749 ac->remove_guid = false;
750 ac->remove_sid = false;
751
752 const_attrs = req->op.search.attrs;
753
754 /* We only need to do special processing if we were asked for
755 * the extended DN, or we are 'store DN+GUID+SID'
756 * (!dereference) mode. (This is the normal mode for LDB on
757 * tdb). */
758 if (control || (storage_format_control && p && !p->dereference)) {
759 ac->inject = true;
760 if (extended_ctrl) {
761 ac->extended_type = extended_ctrl->type;
762 } else {
763 ac->extended_type = 0;
764 }
765
766 /* check if attrs only is specified, in that case check wether we need to modify them */
767 if (req->op.search.attrs && !is_attr_in_list(req->op.search.attrs, "*")) {
768 if (! is_attr_in_list(req->op.search.attrs, "objectGUID")) {
769 ac->remove_guid = true;
770 }
771 if (! is_attr_in_list(req->op.search.attrs, "objectSid")) {
772 ac->remove_sid = true;
773 }
774 if (ac->remove_guid || ac->remove_sid) {
775 new_attrs = copy_attrs(ac, req->op.search.attrs);
776 if (new_attrs == NULL) {
777 return ldb_oom(ldb);
778 }
779
780 if (ac->remove_guid) {
781 if (!add_attrs(ac, &new_attrs, "objectGUID"))
782 return ldb_operr(ldb);
783 }
784 if (ac->remove_sid) {
785 if (!add_attrs(ac, &new_attrs, "objectSid"))
786 return ldb_operr(ldb);
787 }
788 const_attrs = (const char * const *)new_attrs;
789 }
790 }
791 }
792
793 ret = ldb_build_search_req_ex(&down_req,
794 ldb, ac,
795 req->op.search.base,
796 req->op.search.scope,
797 req->op.search.tree,
798 const_attrs,
799 req->controls,
800 ac, callback,
801 req);
802 LDB_REQ_SET_LOCATION(down_req);
803 if (ret != LDB_SUCCESS) {
804 return ret;
805 }
806
807 /* mark extended DN and storage format controls as done */
808 if (control) {
809 critical = control->critical;
810 control->critical = 0;
811 }
812
813 if (storage_format_control) {
814 storage_format_control->critical = 0;
815 }
816
817 /* Add in dereference control, if we were asked to, we are
818 * using the 'dereference' mode (such as with an OpenLDAP
819 * backend) and have the control prepared */
820 if (control && p && p->dereference) {
821 ret = extended_dn_out_dereference_setup_control(ldb, p);
822 if (ret != LDB_SUCCESS) {
823 return ret;
824 }
825
826 /* We should always have this, but before the schema
827 * is with us, things get tricky */
828 if (p->dereference_control) {
829
830 /* This control must *not* be critical,
831 * because if this particular request did not
832 * return any dereferencable attributes in the
833 * end, then OpenLDAP will reply with
834 * unavailableCriticalExtension, rather than
835 * just an empty return control */
836 ret = ldb_request_add_control(down_req,
837 DSDB_OPENLDAP_DEREFERENCE_CONTROL,
838 false, p->dereference_control);
839 if (ret != LDB_SUCCESS) {
840 return ret;
841 }
842 }
843 }
844
845 /* perform the search */
846 return ldb_next_request(module, down_req);
847 }
848
849 static int extended_dn_out_ldb_search(struct ldb_module *module, struct ldb_request *req)
850 {
851 return extended_dn_out_search(module, req, extended_callback_ldb);
852 }
853
854 static int extended_dn_out_openldap_search(struct ldb_module *module, struct ldb_request *req)
855 {
856 return extended_dn_out_search(module, req, extended_callback_openldap);
857 }
858
859 static int extended_dn_out_fds_search(struct ldb_module *module, struct ldb_request *req)
860 {
861 return extended_dn_out_search(module, req, extended_callback_fds);
862 }
863
864 static int extended_dn_out_ldb_init(struct ldb_module *module)
865 {
866 int ret;
867
868 struct extended_dn_out_private *p = talloc(module, struct extended_dn_out_private);
869 struct dsdb_extended_dn_store_format *dn_format;
870
871 ldb_module_set_private(module, p);
872
873 if (!p) {
874 return ldb_oom(ldb_module_get_ctx(module));
875 }
876
877 dn_format = talloc(p, struct dsdb_extended_dn_store_format);
878 if (!dn_format) {
879 talloc_free(p);
880 return ldb_oom(ldb_module_get_ctx(module));
881 }
882
883 dn_format->store_extended_dn_in_ldb = true;
884 ret = ldb_set_opaque(ldb_module_get_ctx(module), DSDB_EXTENDED_DN_STORE_FORMAT_OPAQUE_NAME, dn_format);
885 if (ret != LDB_SUCCESS) {
886 talloc_free(p);
887 return ret;
888 }
889
890 p->dereference = false;
891 p->normalise = false;
892
893 ret = ldb_mod_register_control(module, LDB_CONTROL_EXTENDED_DN_OID);
894 if (ret != LDB_SUCCESS) {
895 ldb_debug(ldb_module_get_ctx(module), LDB_DEBUG_ERROR,
896 "extended_dn_out: Unable to register control with rootdse!\n");
897 return ldb_operr(ldb_module_get_ctx(module));
898 }
899
900 return ldb_next_init(module);
901 }
902
903 static int extended_dn_out_dereference_init(struct ldb_module *module, const char *attrs[])
904 {
905 int ret;
906 struct extended_dn_out_private *p = talloc_zero(module, struct extended_dn_out_private);
907 struct dsdb_extended_dn_store_format *dn_format;
908
909 ldb_module_set_private(module, p);
910
911 if (!p) {
912 return ldb_module_oom(module);
913 }
914
915 dn_format = talloc(p, struct dsdb_extended_dn_store_format);
916 if (!dn_format) {
917 talloc_free(p);
918 return ldb_module_oom(module);
919 }
920
921 dn_format->store_extended_dn_in_ldb = false;
922
923 ret = ldb_set_opaque(ldb_module_get_ctx(module), DSDB_EXTENDED_DN_STORE_FORMAT_OPAQUE_NAME, dn_format);
924 if (ret != LDB_SUCCESS) {
925 talloc_free(p);
926 return ret;
927 }
928
929 p->dereference = true;
930
931 p->attrs = attrs;
932 /* At the moment, servers that need dereference also need the
933 * DN and attribute names to be normalised */
934 p->normalise = true;
935
936 ret = ldb_mod_register_control(module, LDB_CONTROL_EXTENDED_DN_OID);
937 if (ret != LDB_SUCCESS) {
938 ldb_debug(ldb_module_get_ctx(module), LDB_DEBUG_ERROR,
939 "extended_dn_out: Unable to register control with rootdse!\n");
940 return ldb_operr(ldb_module_get_ctx(module));
941 }
942
943 return ldb_next_init(module);
944 }
945
946 static int extended_dn_out_openldap_init(struct ldb_module *module)
947 {
948 static const char *attrs[] = {
949 "entryUUID",
950 "objectSid",
951 NULL
952 };
953
954 return extended_dn_out_dereference_init(module, attrs);
955 }
956
957 static int extended_dn_out_fds_init(struct ldb_module *module)
958 {
959 static const char *attrs[] = {
960 "nsUniqueId",
961 "sambaSID",
962 NULL
963 };
964
965 return extended_dn_out_dereference_init(module, attrs);
966 }
967
968 static const struct ldb_module_ops ldb_extended_dn_out_ldb_module_ops = {
969 .name = "extended_dn_out_ldb",
970 .search = extended_dn_out_ldb_search,
971 .init_context = extended_dn_out_ldb_init,
972 };
973
974 static const struct ldb_module_ops ldb_extended_dn_out_openldap_module_ops = {
975 .name = "extended_dn_out_openldap",
976 .search = extended_dn_out_openldap_search,
977 .init_context = extended_dn_out_openldap_init,
978 };
979
980 static const struct ldb_module_ops ldb_extended_dn_out_fds_module_ops = {
981 .name = "extended_dn_out_fds",
982 .search = extended_dn_out_fds_search,
983 .init_context = extended_dn_out_fds_init,
984 };
985
986 /*
987 initialise the module
988 */
989 _PUBLIC_ int ldb_extended_dn_out_module_init(const char *version)
990 {
991 int ret;
992 LDB_MODULE_CHECK_VERSION(version);
993 ret = ldb_register_module(&ldb_extended_dn_out_ldb_module_ops);
994 if (ret != LDB_SUCCESS) {
995 return ret;
996 }
997 ret = ldb_register_module(&ldb_extended_dn_out_openldap_module_ops);
998 if (ret != LDB_SUCCESS) {
999 return ret;
1000 }
1001 ret = ldb_register_module(&ldb_extended_dn_out_fds_module_ops);
1002 if (ret != LDB_SUCCESS) {
1003 return ret;
1004 }
1005 return LDB_SUCCESS;
1006 }
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