4 Copyright (C) Simo Sorce 2006-2008
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2007
6 Copyright (C) Nadezhda Ivanova 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: DS Security descriptor module
28 * - Calculate the security descriptor of a newly created object
29 * - Perform sd recalculation on a move operation
30 * - Handle sd modification invariants
32 * Author: Nadezhda Ivanova
36 #include <ldb_module.h>
37 #include "util/dlinklist.h"
38 #include "dsdb/samdb/samdb.h"
39 #include "librpc/ndr/libndr.h"
40 #include "librpc/gen_ndr/ndr_security.h"
41 #include "libcli/security/security.h"
42 #include "auth/auth.h"
43 #include "param/param.h"
44 #include "dsdb/samdb/ldb_modules/util.h"
45 #include "lib/util/binsearch.h"
47 struct descriptor_changes
{
48 struct descriptor_changes
*prev
, *next
;
49 struct descriptor_changes
*children
;
50 struct ldb_dn
*nc_root
;
54 struct ldb_dn
*stopped_dn
;
57 struct descriptor_data
{
58 TALLOC_CTX
*trans_mem
;
59 struct descriptor_changes
*changes
;
62 struct descriptor_context
{
63 struct ldb_module
*module
;
64 struct ldb_request
*req
;
65 struct ldb_message
*msg
;
66 struct ldb_reply
*search_res
;
67 struct ldb_reply
*search_oc_res
;
68 struct ldb_val
*parentsd_val
;
69 struct ldb_message_element
*sd_element
;
70 struct ldb_val
*sd_val
;
72 int (*step_fn
)(struct descriptor_context
*);
75 static struct dom_sid
*get_default_ag(TALLOC_CTX
*mem_ctx
,
77 struct security_token
*token
,
78 struct ldb_context
*ldb
)
80 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
81 const struct dom_sid
*domain_sid
= samdb_domain_sid(ldb
);
82 struct dom_sid
*da_sid
= dom_sid_add_rid(tmp_ctx
, domain_sid
, DOMAIN_RID_ADMINS
);
83 struct dom_sid
*ea_sid
= dom_sid_add_rid(tmp_ctx
, domain_sid
, DOMAIN_RID_ENTERPRISE_ADMINS
);
84 struct dom_sid
*sa_sid
= dom_sid_add_rid(tmp_ctx
, domain_sid
, DOMAIN_RID_SCHEMA_ADMINS
);
85 struct dom_sid
*dag_sid
;
86 struct ldb_dn
*nc_root
;
89 ret
= dsdb_find_nc_root(ldb
, tmp_ctx
, dn
, &nc_root
);
90 if (ret
!= LDB_SUCCESS
) {
95 if (ldb_dn_compare(nc_root
, ldb_get_schema_basedn(ldb
)) == 0) {
96 if (security_token_has_sid(token
, sa_sid
)) {
97 dag_sid
= dom_sid_dup(mem_ctx
, sa_sid
);
98 } else if (security_token_has_sid(token
, ea_sid
)) {
99 dag_sid
= dom_sid_dup(mem_ctx
, ea_sid
);
100 } else if (security_token_has_sid(token
, da_sid
)) {
101 dag_sid
= dom_sid_dup(mem_ctx
, da_sid
);
102 } else if (security_token_is_system(token
)) {
103 dag_sid
= dom_sid_dup(mem_ctx
, sa_sid
);
107 } else if (ldb_dn_compare(nc_root
, ldb_get_config_basedn(ldb
)) == 0) {
108 if (security_token_has_sid(token
, ea_sid
)) {
109 dag_sid
= dom_sid_dup(mem_ctx
, ea_sid
);
110 } else if (security_token_has_sid(token
, da_sid
)) {
111 dag_sid
= dom_sid_dup(mem_ctx
, da_sid
);
112 } else if (security_token_is_system(token
)) {
113 dag_sid
= dom_sid_dup(mem_ctx
, ea_sid
);
117 } else if (ldb_dn_compare(nc_root
, ldb_get_default_basedn(ldb
)) == 0) {
118 if (security_token_has_sid(token
, da_sid
)) {
119 dag_sid
= dom_sid_dup(mem_ctx
, da_sid
);
120 } else if (security_token_has_sid(token
, ea_sid
)) {
121 dag_sid
= dom_sid_dup(mem_ctx
, ea_sid
);
122 } else if (security_token_is_system(token
)) {
123 dag_sid
= dom_sid_dup(mem_ctx
, da_sid
);
131 talloc_free(tmp_ctx
);
135 static struct security_descriptor
*get_sd_unpacked(struct ldb_module
*module
, TALLOC_CTX
*mem_ctx
,
136 const struct dsdb_class
*objectclass
)
138 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
139 struct security_descriptor
*sd
;
140 const struct dom_sid
*domain_sid
= samdb_domain_sid(ldb
);
142 if (!objectclass
->defaultSecurityDescriptor
|| !domain_sid
) {
146 sd
= sddl_decode(mem_ctx
,
147 objectclass
->defaultSecurityDescriptor
,
152 static struct dom_sid
*get_default_group(TALLOC_CTX
*mem_ctx
,
153 struct ldb_context
*ldb
,
156 if (dsdb_functional_level(ldb
) >= DS_DOMAIN_FUNCTION_2008
) {
163 static struct security_descriptor
*descr_handle_sd_flags(TALLOC_CTX
*mem_ctx
,
164 struct security_descriptor
*new_sd
,
165 struct security_descriptor
*old_sd
,
168 struct security_descriptor
*final_sd
;
169 /* if there is no control or control == 0 modify everything */
174 final_sd
= talloc_zero(mem_ctx
, struct security_descriptor
);
175 final_sd
->revision
= SECURITY_DESCRIPTOR_REVISION_1
;
176 final_sd
->type
= SEC_DESC_SELF_RELATIVE
;
178 if (sd_flags
& (SECINFO_OWNER
)) {
179 final_sd
->owner_sid
= talloc_memdup(mem_ctx
, new_sd
->owner_sid
, sizeof(struct dom_sid
));
180 final_sd
->type
|= new_sd
->type
& SEC_DESC_OWNER_DEFAULTED
;
183 final_sd
->owner_sid
= talloc_memdup(mem_ctx
, old_sd
->owner_sid
, sizeof(struct dom_sid
));
184 final_sd
->type
|= old_sd
->type
& SEC_DESC_OWNER_DEFAULTED
;
187 if (sd_flags
& (SECINFO_GROUP
)) {
188 final_sd
->group_sid
= talloc_memdup(mem_ctx
, new_sd
->group_sid
, sizeof(struct dom_sid
));
189 final_sd
->type
|= new_sd
->type
& SEC_DESC_GROUP_DEFAULTED
;
192 final_sd
->group_sid
= talloc_memdup(mem_ctx
, old_sd
->group_sid
, sizeof(struct dom_sid
));
193 final_sd
->type
|= old_sd
->type
& SEC_DESC_GROUP_DEFAULTED
;
196 if (sd_flags
& (SECINFO_SACL
)) {
197 final_sd
->sacl
= security_acl_dup(mem_ctx
,new_sd
->sacl
);
198 final_sd
->type
|= new_sd
->type
& (SEC_DESC_SACL_PRESENT
|
199 SEC_DESC_SACL_DEFAULTED
|SEC_DESC_SACL_AUTO_INHERIT_REQ
|
200 SEC_DESC_SACL_AUTO_INHERITED
|SEC_DESC_SACL_PROTECTED
|
201 SEC_DESC_SERVER_SECURITY
);
203 else if (old_sd
&& old_sd
->sacl
) {
204 final_sd
->sacl
= security_acl_dup(mem_ctx
,old_sd
->sacl
);
205 final_sd
->type
|= old_sd
->type
& (SEC_DESC_SACL_PRESENT
|
206 SEC_DESC_SACL_DEFAULTED
|SEC_DESC_SACL_AUTO_INHERIT_REQ
|
207 SEC_DESC_SACL_AUTO_INHERITED
|SEC_DESC_SACL_PROTECTED
|
208 SEC_DESC_SERVER_SECURITY
);
211 if (sd_flags
& (SECINFO_DACL
)) {
212 final_sd
->dacl
= security_acl_dup(mem_ctx
,new_sd
->dacl
);
213 final_sd
->type
|= new_sd
->type
& (SEC_DESC_DACL_PRESENT
|
214 SEC_DESC_DACL_DEFAULTED
|SEC_DESC_DACL_AUTO_INHERIT_REQ
|
215 SEC_DESC_DACL_AUTO_INHERITED
|SEC_DESC_DACL_PROTECTED
|
216 SEC_DESC_DACL_TRUSTED
);
218 else if (old_sd
&& old_sd
->dacl
) {
219 final_sd
->dacl
= security_acl_dup(mem_ctx
,old_sd
->dacl
);
220 final_sd
->type
|= old_sd
->type
& (SEC_DESC_DACL_PRESENT
|
221 SEC_DESC_DACL_DEFAULTED
|SEC_DESC_DACL_AUTO_INHERIT_REQ
|
222 SEC_DESC_DACL_AUTO_INHERITED
|SEC_DESC_DACL_PROTECTED
|
223 SEC_DESC_DACL_TRUSTED
);
225 /* not so sure about this */
226 final_sd
->type
|= new_sd
->type
& SEC_DESC_RM_CONTROL_VALID
;
230 static DATA_BLOB
*get_new_descriptor(struct ldb_module
*module
,
233 const struct dsdb_class
*objectclass
,
234 const struct ldb_val
*parent
,
235 const struct ldb_val
*object
,
236 const struct ldb_val
*old_sd
,
239 struct security_descriptor
*user_descriptor
= NULL
, *parent_descriptor
= NULL
;
240 struct security_descriptor
*old_descriptor
= NULL
;
241 struct security_descriptor
*new_sd
, *final_sd
;
242 DATA_BLOB
*linear_sd
;
243 enum ndr_err_code ndr_err
;
244 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
245 struct auth_session_info
*session_info
246 = ldb_get_opaque(ldb
, "sessionInfo");
247 const struct dom_sid
*domain_sid
= samdb_domain_sid(ldb
);
249 struct dom_sid
*default_owner
;
250 struct dom_sid
*default_group
;
251 struct security_descriptor
*default_descriptor
= NULL
;
253 if (objectclass
!= NULL
) {
254 default_descriptor
= get_sd_unpacked(module
, mem_ctx
, objectclass
);
258 user_descriptor
= talloc(mem_ctx
, struct security_descriptor
);
259 if (!user_descriptor
) {
262 ndr_err
= ndr_pull_struct_blob(object
, user_descriptor
,
264 (ndr_pull_flags_fn_t
)ndr_pull_security_descriptor
);
266 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
267 talloc_free(user_descriptor
);
271 user_descriptor
= default_descriptor
;
275 old_descriptor
= talloc(mem_ctx
, struct security_descriptor
);
276 if (!old_descriptor
) {
279 ndr_err
= ndr_pull_struct_blob(old_sd
, old_descriptor
,
281 (ndr_pull_flags_fn_t
)ndr_pull_security_descriptor
);
283 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
284 talloc_free(old_descriptor
);
290 parent_descriptor
= talloc(mem_ctx
, struct security_descriptor
);
291 if (!parent_descriptor
) {
294 ndr_err
= ndr_pull_struct_blob(parent
, parent_descriptor
,
296 (ndr_pull_flags_fn_t
)ndr_pull_security_descriptor
);
298 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
299 talloc_free(parent_descriptor
);
304 if (user_descriptor
&& default_descriptor
&&
305 (user_descriptor
->dacl
== NULL
))
307 user_descriptor
->dacl
= default_descriptor
->dacl
;
308 user_descriptor
->type
|= default_descriptor
->type
& (
309 SEC_DESC_DACL_PRESENT
|
310 SEC_DESC_DACL_DEFAULTED
|SEC_DESC_DACL_AUTO_INHERIT_REQ
|
311 SEC_DESC_DACL_AUTO_INHERITED
|SEC_DESC_DACL_PROTECTED
|
312 SEC_DESC_DACL_TRUSTED
);
315 if (user_descriptor
&& default_descriptor
&&
316 (user_descriptor
->sacl
== NULL
))
318 user_descriptor
->sacl
= default_descriptor
->sacl
;
319 user_descriptor
->type
|= default_descriptor
->type
& (
320 SEC_DESC_SACL_PRESENT
|
321 SEC_DESC_SACL_DEFAULTED
|SEC_DESC_SACL_AUTO_INHERIT_REQ
|
322 SEC_DESC_SACL_AUTO_INHERITED
|SEC_DESC_SACL_PROTECTED
|
323 SEC_DESC_SERVER_SECURITY
);
327 if (!(sd_flags
& SECINFO_OWNER
) && user_descriptor
) {
328 user_descriptor
->owner_sid
= NULL
;
331 * We need the correct owner sid
332 * when calculating the DACL or SACL
334 if (old_descriptor
) {
335 user_descriptor
->owner_sid
= old_descriptor
->owner_sid
;
338 if (!(sd_flags
& SECINFO_GROUP
) && user_descriptor
) {
339 user_descriptor
->group_sid
= NULL
;
342 * We need the correct group sid
343 * when calculating the DACL or SACL
345 if (old_descriptor
) {
346 user_descriptor
->group_sid
= old_descriptor
->group_sid
;
349 if (!(sd_flags
& SECINFO_DACL
) && user_descriptor
) {
350 user_descriptor
->dacl
= NULL
;
353 * We add SEC_DESC_DACL_PROTECTED so that
354 * create_security_descriptor() skips
355 * the unused inheritance calculation
357 user_descriptor
->type
|= SEC_DESC_DACL_PROTECTED
;
359 if (!(sd_flags
& SECINFO_SACL
) && user_descriptor
) {
360 user_descriptor
->sacl
= NULL
;
363 * We add SEC_DESC_SACL_PROTECTED so that
364 * create_security_descriptor() skips
365 * the unused inheritance calculation
367 user_descriptor
->type
|= SEC_DESC_SACL_PROTECTED
;
370 default_owner
= get_default_ag(mem_ctx
, dn
,
371 session_info
->security_token
, ldb
);
372 default_group
= get_default_group(mem_ctx
, ldb
, default_owner
);
373 new_sd
= create_security_descriptor(mem_ctx
, parent_descriptor
, user_descriptor
, true,
374 NULL
, SEC_DACL_AUTO_INHERIT
|SEC_SACL_AUTO_INHERIT
,
375 session_info
->security_token
,
376 default_owner
, default_group
,
377 map_generic_rights_ds
);
381 final_sd
= descr_handle_sd_flags(mem_ctx
, new_sd
, old_descriptor
, sd_flags
);
387 if (final_sd
->dacl
) {
388 final_sd
->dacl
->revision
= SECURITY_ACL_REVISION_ADS
;
390 if (final_sd
->sacl
) {
391 final_sd
->sacl
->revision
= SECURITY_ACL_REVISION_ADS
;
394 sddl_sd
= sddl_encode(mem_ctx
, final_sd
, domain_sid
);
395 DEBUG(10, ("Object %s created with desriptor %s\n\n", ldb_dn_get_linearized(dn
), sddl_sd
));
397 linear_sd
= talloc(mem_ctx
, DATA_BLOB
);
402 ndr_err
= ndr_push_struct_blob(linear_sd
, mem_ctx
,
404 (ndr_push_flags_fn_t
)ndr_push_security_descriptor
);
405 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
412 static DATA_BLOB
*descr_get_descriptor_to_show(struct ldb_module
*module
,
417 struct security_descriptor
*old_sd
, *final_sd
;
418 DATA_BLOB
*linear_sd
;
419 enum ndr_err_code ndr_err
;
421 old_sd
= talloc(mem_ctx
, struct security_descriptor
);
425 ndr_err
= ndr_pull_struct_blob(sd
, old_sd
,
427 (ndr_pull_flags_fn_t
)ndr_pull_security_descriptor
);
429 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
434 final_sd
= descr_handle_sd_flags(mem_ctx
, old_sd
, NULL
, sd_flags
);
440 linear_sd
= talloc(mem_ctx
, DATA_BLOB
);
445 ndr_err
= ndr_push_struct_blob(linear_sd
, mem_ctx
,
447 (ndr_push_flags_fn_t
)ndr_push_security_descriptor
);
448 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
455 static struct descriptor_context
*descriptor_init_context(struct ldb_module
*module
,
456 struct ldb_request
*req
)
458 struct ldb_context
*ldb
;
459 struct descriptor_context
*ac
;
461 ldb
= ldb_module_get_ctx(module
);
463 ac
= talloc_zero(req
, struct descriptor_context
);
465 ldb_set_errstring(ldb
, "Out of Memory");
474 static int descriptor_search_callback(struct ldb_request
*req
, struct ldb_reply
*ares
)
476 struct descriptor_context
*ac
;
477 struct ldb_val
*sd_val
= NULL
;
478 struct ldb_message_element
*sd_el
;
482 ac
= talloc_get_type(req
->context
, struct descriptor_context
);
485 ret
= LDB_ERR_OPERATIONS_ERROR
;
488 if (ares
->error
!= LDB_SUCCESS
) {
489 return ldb_module_done(ac
->req
, ares
->controls
,
490 ares
->response
, ares
->error
);
493 switch (ares
->type
) {
494 case LDB_REPLY_ENTRY
:
495 sd_el
= ldb_msg_find_element(ares
->message
, "nTSecurityDescriptor");
497 sd_val
= sd_el
->values
;
501 show_sd
= descr_get_descriptor_to_show(ac
->module
, ac
->req
,
502 sd_val
, ac
->sd_flags
);
504 ret
= LDB_ERR_OPERATIONS_ERROR
;
507 ldb_msg_remove_attr(ares
->message
, "nTSecurityDescriptor");
508 ret
= ldb_msg_add_steal_value(ares
->message
, "nTSecurityDescriptor", show_sd
);
509 if (ret
!= LDB_SUCCESS
) {
513 return ldb_module_send_entry(ac
->req
, ares
->message
, ares
->controls
);
515 case LDB_REPLY_REFERRAL
:
516 return ldb_module_send_referral(ac
->req
, ares
->referral
);
519 return ldb_module_done(ac
->req
, ares
->controls
,
520 ares
->response
, ares
->error
);
525 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
528 static int descriptor_add(struct ldb_module
*module
, struct ldb_request
*req
)
530 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
531 struct ldb_request
*add_req
;
532 struct ldb_message
*msg
;
533 struct ldb_result
*parent_res
;
534 const struct ldb_val
*parent_sd
= NULL
;
535 const struct ldb_val
*user_sd
;
536 struct ldb_dn
*dn
= req
->op
.add
.message
->dn
;
537 struct ldb_dn
*parent_dn
, *nc_root
;
538 struct ldb_message_element
*objectclass_element
, *sd_element
;
540 const struct dsdb_schema
*schema
;
542 const struct dsdb_class
*objectclass
;
543 static const char * const parent_attrs
[] = { "nTSecurityDescriptor", NULL
};
544 uint32_t instanceType
;
546 uint32_t sd_flags
= dsdb_request_sd_flags(req
, NULL
);
548 /* do not manipulate our control entries */
549 if (ldb_dn_is_special(dn
)) {
550 return ldb_next_request(module
, req
);
553 user_sd
= ldb_msg_find_ldb_val(req
->op
.add
.message
, "nTSecurityDescriptor");
554 sd_element
= ldb_msg_find_element(req
->op
.add
.message
, "nTSecurityDescriptor");
555 /* nTSecurityDescriptor without a value is an error, letting through so it is handled */
556 if (user_sd
== NULL
&& sd_element
) {
557 return ldb_next_request(module
, req
);
560 ldb_debug(ldb
, LDB_DEBUG_TRACE
,"descriptor_add: %s\n", ldb_dn_get_linearized(dn
));
562 instanceType
= ldb_msg_find_attr_as_uint(req
->op
.add
.message
, "instanceType", 0);
564 if (instanceType
& INSTANCE_TYPE_IS_NC_HEAD
) {
569 ret
= dsdb_find_nc_root(ldb
, req
, dn
, &nc_root
);
570 if (ret
!= LDB_SUCCESS
) {
571 ldb_debug(ldb
, LDB_DEBUG_TRACE
,"descriptor_add: Could not find NC root for %s\n",
572 ldb_dn_get_linearized(dn
));
576 if (ldb_dn_compare(dn
, nc_root
) == 0) {
577 DEBUG(0, ("Found DN %s being a NC by the old method\n", ldb_dn_get_linearized(dn
)));
583 DEBUG(2, ("DN: %s is a NC\n", ldb_dn_get_linearized(dn
)));
586 /* if the object has a parent, retrieve its SD to
587 * use for calculation. Unfortunately we do not yet have
588 * instanceType, so we use dsdb_find_nc_root. */
590 parent_dn
= ldb_dn_get_parent(req
, dn
);
591 if (parent_dn
== NULL
) {
595 /* we aren't any NC */
596 ret
= dsdb_module_search_dn(module
, req
, &parent_res
, parent_dn
,
598 DSDB_FLAG_NEXT_MODULE
|
599 DSDB_FLAG_AS_SYSTEM
|
600 DSDB_SEARCH_SHOW_RECYCLED
,
602 if (ret
!= LDB_SUCCESS
) {
603 ldb_debug(ldb
, LDB_DEBUG_TRACE
,"descriptor_add: Could not find SD for %s\n",
604 ldb_dn_get_linearized(parent_dn
));
607 if (parent_res
->count
!= 1) {
608 return ldb_operr(ldb
);
610 parent_sd
= ldb_msg_find_ldb_val(parent_res
->msgs
[0], "nTSecurityDescriptor");
613 schema
= dsdb_get_schema(ldb
, req
);
615 objectclass_element
= ldb_msg_find_element(req
->op
.add
.message
, "objectClass");
616 if (objectclass_element
== NULL
) {
617 return ldb_operr(ldb
);
620 objectclass
= dsdb_get_last_structural_class(schema
,
621 objectclass_element
);
622 if (objectclass
== NULL
) {
623 return ldb_operr(ldb
);
627 * The SD_FLAG control is ignored on add
628 * and we default to all bits set.
632 sd
= get_new_descriptor(module
, dn
, req
,
633 objectclass
, parent_sd
,
634 user_sd
, NULL
, sd_flags
);
636 return ldb_operr(ldb
);
638 msg
= ldb_msg_copy_shallow(req
, req
->op
.add
.message
);
642 if (sd_element
!= NULL
) {
643 sd_element
->values
[0] = *sd
;
645 ret
= ldb_msg_add_steal_value(msg
,
646 "nTSecurityDescriptor",
648 if (ret
!= LDB_SUCCESS
) {
653 ret
= ldb_build_add_req(&add_req
, ldb
, req
,
656 req
, dsdb_next_callback
,
658 LDB_REQ_SET_LOCATION(add_req
);
659 if (ret
!= LDB_SUCCESS
) {
660 return ldb_error(ldb
, ret
,
661 "descriptor_add: Error creating new add request.");
664 return ldb_next_request(module
, add_req
);
667 static int descriptor_modify(struct ldb_module
*module
, struct ldb_request
*req
)
669 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
670 struct ldb_request
*mod_req
;
671 struct ldb_message
*msg
;
672 struct ldb_result
*current_res
, *parent_res
;
673 const struct ldb_val
*old_sd
= NULL
;
674 const struct ldb_val
*parent_sd
= NULL
;
675 const struct ldb_val
*user_sd
;
676 struct ldb_dn
*dn
= req
->op
.mod
.message
->dn
;
677 struct ldb_dn
*parent_dn
;
678 struct ldb_message_element
*objectclass_element
, *sd_element
;
680 uint32_t instanceType
;
681 bool explicit_sd_flags
= false;
682 uint32_t sd_flags
= dsdb_request_sd_flags(req
, &explicit_sd_flags
);
683 const struct dsdb_schema
*schema
;
685 const struct dsdb_class
*objectclass
;
686 static const char * const parent_attrs
[] = { "nTSecurityDescriptor", NULL
};
687 static const char * const current_attrs
[] = { "nTSecurityDescriptor",
689 "objectClass", NULL
};
690 struct ldb_control
*sd_propagation_control
;
693 /* do not manipulate our control entries */
694 if (ldb_dn_is_special(dn
)) {
695 return ldb_next_request(module
, req
);
698 sd_propagation_control
= ldb_request_get_control(req
,
699 DSDB_CONTROL_SEC_DESC_PROPAGATION_OID
);
700 if (sd_propagation_control
!= NULL
) {
701 if (sd_propagation_control
->data
!= module
) {
702 return ldb_operr(ldb
);
704 if (req
->op
.mod
.message
->num_elements
!= 0) {
705 return ldb_operr(ldb
);
707 if (explicit_sd_flags
) {
708 return ldb_operr(ldb
);
710 if (sd_flags
!= 0xF) {
711 return ldb_operr(ldb
);
713 if (sd_propagation_control
->critical
== 0) {
714 return ldb_operr(ldb
);
717 sd_propagation_control
->critical
= 0;
720 sd_element
= ldb_msg_find_element(req
->op
.mod
.message
, "nTSecurityDescriptor");
721 if (sd_propagation_control
== NULL
&& sd_element
== NULL
) {
722 return ldb_next_request(module
, req
);
726 * nTSecurityDescriptor with DELETE is not supported yet.
727 * TODO: handle this correctly.
729 if (sd_propagation_control
== NULL
&&
730 LDB_FLAG_MOD_TYPE(sd_element
->flags
) == LDB_FLAG_MOD_DELETE
)
732 return ldb_module_error(module
,
733 LDB_ERR_UNWILLING_TO_PERFORM
,
734 "MOD_DELETE for nTSecurityDescriptor "
735 "not supported yet");
738 user_sd
= ldb_msg_find_ldb_val(req
->op
.mod
.message
, "nTSecurityDescriptor");
739 /* nTSecurityDescriptor without a value is an error, letting through so it is handled */
740 if (sd_propagation_control
== NULL
&& user_sd
== NULL
) {
741 return ldb_next_request(module
, req
);
744 ldb_debug(ldb
, LDB_DEBUG_TRACE
,"descriptor_modify: %s\n", ldb_dn_get_linearized(dn
));
746 ret
= dsdb_module_search_dn(module
, req
, ¤t_res
, dn
,
748 DSDB_FLAG_NEXT_MODULE
|
749 DSDB_FLAG_AS_SYSTEM
|
750 DSDB_SEARCH_SHOW_RECYCLED
,
752 if (ret
!= LDB_SUCCESS
) {
753 ldb_debug(ldb
, LDB_DEBUG_ERROR
,"descriptor_modify: Could not find %s\n",
754 ldb_dn_get_linearized(dn
));
758 instanceType
= ldb_msg_find_attr_as_uint(current_res
->msgs
[0],
760 /* if the object has a parent, retrieve its SD to
761 * use for calculation */
762 if (!ldb_dn_is_null(current_res
->msgs
[0]->dn
) &&
763 !(instanceType
& INSTANCE_TYPE_IS_NC_HEAD
)) {
764 parent_dn
= ldb_dn_get_parent(req
, dn
);
765 if (parent_dn
== NULL
) {
768 ret
= dsdb_module_search_dn(module
, req
, &parent_res
, parent_dn
,
770 DSDB_FLAG_NEXT_MODULE
|
771 DSDB_FLAG_AS_SYSTEM
|
772 DSDB_SEARCH_SHOW_RECYCLED
,
774 if (ret
!= LDB_SUCCESS
) {
775 ldb_debug(ldb
, LDB_DEBUG_ERROR
, "descriptor_modify: Could not find SD for %s\n",
776 ldb_dn_get_linearized(parent_dn
));
779 if (parent_res
->count
!= 1) {
780 return ldb_operr(ldb
);
782 parent_sd
= ldb_msg_find_ldb_val(parent_res
->msgs
[0], "nTSecurityDescriptor");
785 schema
= dsdb_get_schema(ldb
, req
);
787 objectclass_element
= ldb_msg_find_element(current_res
->msgs
[0], "objectClass");
788 if (objectclass_element
== NULL
) {
789 return ldb_operr(ldb
);
792 objectclass
= dsdb_get_last_structural_class(schema
,
793 objectclass_element
);
794 if (objectclass
== NULL
) {
795 return ldb_operr(ldb
);
798 old_sd
= ldb_msg_find_ldb_val(current_res
->msgs
[0], "nTSecurityDescriptor");
799 if (old_sd
== NULL
) {
800 return ldb_operr(ldb
);
803 if (sd_propagation_control
!= NULL
) {
805 * This just triggers a recalculation of the
811 sd
= get_new_descriptor(module
, dn
, req
,
812 objectclass
, parent_sd
,
813 user_sd
, old_sd
, sd_flags
);
815 return ldb_operr(ldb
);
817 msg
= ldb_msg_copy_shallow(req
, req
->op
.mod
.message
);
821 cmp_ret
= data_blob_cmp(old_sd
, sd
);
822 if (sd_propagation_control
!= NULL
) {
825 * The nTSecurityDescriptor is unchanged,
826 * which means we can stop the processing.
828 * We mark the control as critical again,
829 * as we have not processed it, so the caller
830 * can tell that the descriptor was unchanged.
832 sd_propagation_control
->critical
= 1;
833 return ldb_module_done(req
, NULL
, NULL
, LDB_SUCCESS
);
836 ret
= ldb_msg_add_empty(msg
, "nTSecurityDescriptor",
837 LDB_FLAG_MOD_REPLACE
,
839 if (ret
!= LDB_SUCCESS
) {
842 ret
= ldb_msg_add_value(msg
, "nTSecurityDescriptor",
844 if (ret
!= LDB_SUCCESS
) {
847 } else if (cmp_ret
!= 0) {
848 struct ldb_dn
*nc_root
;
850 ret
= dsdb_find_nc_root(ldb
, msg
, dn
, &nc_root
);
851 if (ret
!= LDB_SUCCESS
) {
855 ret
= dsdb_module_schedule_sd_propagation(module
, nc_root
,
857 if (ret
!= LDB_SUCCESS
) {
858 return ldb_operr(ldb
);
860 sd_element
->values
[0] = *sd
;
862 sd_element
->values
[0] = *sd
;
865 ret
= ldb_build_mod_req(&mod_req
, ldb
, req
,
871 LDB_REQ_SET_LOCATION(mod_req
);
872 if (ret
!= LDB_SUCCESS
) {
876 return ldb_next_request(module
, mod_req
);
879 static int descriptor_search(struct ldb_module
*module
, struct ldb_request
*req
)
882 struct ldb_context
*ldb
;
883 struct ldb_request
*down_req
;
884 struct descriptor_context
*ac
;
885 bool explicit_sd_flags
= false;
886 uint32_t sd_flags
= dsdb_request_sd_flags(req
, &explicit_sd_flags
);
887 bool show_sd
= explicit_sd_flags
;
890 ldb_attr_in_list(req
->op
.search
.attrs
, "nTSecurityDescriptor"))
896 return ldb_next_request(module
, req
);
899 ldb
= ldb_module_get_ctx(module
);
900 ac
= descriptor_init_context(module
, req
);
902 return ldb_operr(ldb
);
904 ac
->sd_flags
= sd_flags
;
906 ret
= ldb_build_search_req_ex(&down_req
, ldb
, ac
,
908 req
->op
.search
.scope
,
910 req
->op
.search
.attrs
,
912 ac
, descriptor_search_callback
,
914 LDB_REQ_SET_LOCATION(down_req
);
915 if (ret
!= LDB_SUCCESS
) {
919 return ldb_next_request(ac
->module
, down_req
);
922 static int descriptor_rename(struct ldb_module
*module
, struct ldb_request
*req
)
924 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
925 struct ldb_dn
*olddn
= req
->op
.rename
.olddn
;
926 struct ldb_dn
*newdn
= req
->op
.rename
.newdn
;
929 /* do not manipulate our control entries */
930 if (ldb_dn_is_special(req
->op
.rename
.olddn
)) {
931 return ldb_next_request(module
, req
);
934 ldb_debug(ldb
, LDB_DEBUG_TRACE
,"descriptor_rename: %s\n",
935 ldb_dn_get_linearized(olddn
));
937 if (ldb_dn_compare(olddn
, newdn
) != 0) {
938 struct ldb_dn
*nc_root
;
940 ret
= dsdb_find_nc_root(ldb
, req
, newdn
, &nc_root
);
941 if (ret
!= LDB_SUCCESS
) {
945 ret
= dsdb_module_schedule_sd_propagation(module
, nc_root
,
947 if (ret
!= LDB_SUCCESS
) {
948 return ldb_operr(ldb
);
952 return ldb_next_request(module
, req
);
955 static int descriptor_extended_sec_desc_propagation(struct ldb_module
*module
,
956 struct ldb_request
*req
)
958 struct descriptor_data
*descriptor_private
=
959 talloc_get_type_abort(ldb_module_get_private(module
),
960 struct descriptor_data
);
961 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
962 struct dsdb_extended_sec_desc_propagation_op
*op
;
963 TALLOC_CTX
*parent_mem
= NULL
;
964 struct descriptor_changes
*parent_change
= NULL
;
965 struct descriptor_changes
*c
;
968 op
= talloc_get_type(req
->op
.extended
.data
,
969 struct dsdb_extended_sec_desc_propagation_op
);
971 ldb_debug(ldb
, LDB_DEBUG_FATAL
,
972 "descriptor_extended_sec_desc_propagation: "
973 "invalid extended data\n");
974 return LDB_ERR_PROTOCOL_ERROR
;
977 if (descriptor_private
->trans_mem
== NULL
) {
978 return ldb_module_operr(module
);
981 parent_mem
= descriptor_private
->trans_mem
;
983 for (c
= descriptor_private
->changes
; c
; c
= c
->next
) {
984 ret
= ldb_dn_compare(c
->nc_root
, op
->nc_root
);
989 ret
= ldb_dn_compare(c
->dn
, op
->dn
);
991 if (op
->include_self
) {
992 c
->force_self
= true;
994 c
->force_children
= true;
996 return ldb_module_done(req
, NULL
, NULL
, LDB_SUCCESS
);
999 ret
= ldb_dn_compare_base(c
->dn
, op
->dn
);
1009 c
= talloc_zero(parent_mem
, struct descriptor_changes
);
1011 return ldb_module_oom(module
);
1013 c
->nc_root
= ldb_dn_copy(c
, op
->nc_root
);
1014 if (c
->nc_root
== NULL
) {
1015 return ldb_module_oom(module
);
1017 c
->dn
= ldb_dn_copy(c
, op
->dn
);
1018 if (c
->dn
== NULL
) {
1019 return ldb_module_oom(module
);
1021 if (op
->include_self
) {
1022 c
->force_self
= true;
1024 c
->force_children
= true;
1027 if (parent_change
!= NULL
) {
1028 DLIST_ADD_END(parent_change
->children
, c
, NULL
);
1030 DLIST_ADD_END(descriptor_private
->changes
, c
, NULL
);
1033 return ldb_module_done(req
, NULL
, NULL
, LDB_SUCCESS
);
1036 static int descriptor_extended(struct ldb_module
*module
, struct ldb_request
*req
)
1038 if (strcmp(req
->op
.extended
.oid
, DSDB_EXTENDED_SEC_DESC_PROPAGATION_OID
) == 0) {
1039 return descriptor_extended_sec_desc_propagation(module
, req
);
1042 return ldb_next_request(module
, req
);
1045 static int descriptor_init(struct ldb_module
*module
)
1047 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
1049 struct descriptor_data
*descriptor_private
;
1051 ret
= ldb_mod_register_control(module
, LDB_CONTROL_SD_FLAGS_OID
);
1052 if (ret
!= LDB_SUCCESS
) {
1053 ldb_debug(ldb
, LDB_DEBUG_ERROR
,
1054 "descriptor: Unable to register control with rootdse!\n");
1055 return ldb_operr(ldb
);
1058 descriptor_private
= talloc_zero(module
, struct descriptor_data
);
1059 if (descriptor_private
== NULL
) {
1061 return LDB_ERR_OPERATIONS_ERROR
;
1063 ldb_module_set_private(module
, descriptor_private
);
1065 return ldb_next_init(module
);
1068 static int descriptor_sd_propagation_object(struct ldb_module
*module
,
1069 struct ldb_message
*msg
,
1072 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
1073 struct ldb_request
*sub_req
;
1074 struct ldb_result
*mod_res
;
1075 struct ldb_control
*sd_propagation_control
;
1080 mod_res
= talloc_zero(msg
, struct ldb_result
);
1081 if (mod_res
== NULL
) {
1082 return ldb_module_oom(module
);
1085 ret
= ldb_build_mod_req(&sub_req
, ldb
, mod_res
,
1089 ldb_modify_default_callback
,
1091 LDB_REQ_SET_LOCATION(sub_req
);
1092 if (ret
!= LDB_SUCCESS
) {
1093 return ldb_module_operr(module
);
1096 ldb_req_mark_trusted(sub_req
);
1098 ret
= ldb_request_add_control(sub_req
,
1099 DSDB_CONTROL_SEC_DESC_PROPAGATION_OID
,
1101 if (ret
!= LDB_SUCCESS
) {
1102 return ldb_module_operr(module
);
1105 sd_propagation_control
= ldb_request_get_control(sub_req
,
1106 DSDB_CONTROL_SEC_DESC_PROPAGATION_OID
);
1107 if (sd_propagation_control
== NULL
) {
1108 return ldb_module_operr(module
);
1111 ret
= dsdb_request_add_controls(sub_req
,
1112 DSDB_FLAG_AS_SYSTEM
|
1113 DSDB_SEARCH_SHOW_RECYCLED
);
1114 if (ret
!= LDB_SUCCESS
) {
1115 return ldb_module_operr(module
);
1118 ret
= descriptor_modify(module
, sub_req
);
1119 if (ret
== LDB_SUCCESS
) {
1120 ret
= ldb_wait(sub_req
->handle
, LDB_WAIT_ALL
);
1122 if (ret
!= LDB_SUCCESS
) {
1123 return ldb_module_operr(module
);
1126 if (sd_propagation_control
->critical
!= 0) {
1130 talloc_free(mod_res
);
1135 static int descriptor_sd_propagation_msg_sort(struct ldb_message
**m1
,
1136 struct ldb_message
**m2
)
1138 struct ldb_dn
*dn1
= (*m1
)->dn
;
1139 struct ldb_dn
*dn2
= (*m2
)->dn
;
1142 * This sorts in tree order, parents first
1144 return ldb_dn_compare(dn2
, dn1
);
1147 static int descriptor_sd_propagation_dn_sort(struct ldb_dn
*dn1
,
1151 * This sorts in tree order, parents first
1153 return ldb_dn_compare(dn2
, dn1
);
1156 static int descriptor_sd_propagation_recursive(struct ldb_module
*module
,
1157 struct descriptor_changes
*change
)
1159 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
1160 struct ldb_result
*res
= NULL
;
1162 const char * const no_attrs
[] = { "@__NONE__", NULL
};
1163 struct descriptor_changes
*c
;
1164 struct descriptor_changes
*stopped_stack
= NULL
;
1168 * Note: that we do not search for deleted/recycled objects
1170 ret
= dsdb_module_search(module
,
1176 DSDB_FLAG_NEXT_MODULE
|
1177 DSDB_FLAG_AS_SYSTEM
,
1178 NULL
, /* parent_req */
1180 if (ret
!= LDB_SUCCESS
) {
1184 TYPESAFE_QSORT(res
->msgs
, res
->count
,
1185 descriptor_sd_propagation_msg_sort
);
1187 for (c
= change
->children
; c
; c
= c
->next
) {
1188 struct ldb_message
*msg
= NULL
;
1190 BINARY_ARRAY_SEARCH_P(res
->msgs
, res
->count
, dn
, c
->dn
,
1191 descriptor_sd_propagation_dn_sort
,
1195 ldb_debug(ldb
, LDB_DEBUG_WARNING
,
1196 "descriptor_sd_propagation_recursive: "
1197 "%s not found under %s",
1198 ldb_dn_get_linearized(c
->dn
),
1199 ldb_dn_get_linearized(change
->dn
));
1203 msg
->elements
= (struct ldb_message_element
*)c
;
1206 DLIST_ADD(stopped_stack
, change
);
1208 if (change
->force_self
) {
1214 for (; i
< res
->count
; i
++) {
1215 struct descriptor_changes
*cur
;
1218 cur
= talloc_get_type(res
->msgs
[i
]->elements
,
1219 struct descriptor_changes
);
1220 res
->msgs
[i
]->elements
= NULL
;
1221 res
->msgs
[i
]->num_elements
= 0;
1224 DLIST_REMOVE(change
->children
, cur
);
1227 for (c
= stopped_stack
; c
; c
= stopped_stack
) {
1228 ret
= ldb_dn_compare_base(c
->dn
,
1234 c
->stopped_dn
= NULL
;
1235 DLIST_REMOVE(stopped_stack
, c
);
1239 DLIST_ADD(stopped_stack
, cur
);
1242 if (stopped_stack
->stopped_dn
!= NULL
) {
1243 ret
= ldb_dn_compare_base(stopped_stack
->stopped_dn
,
1248 stopped_stack
->stopped_dn
= NULL
;
1251 ret
= descriptor_sd_propagation_object(module
, res
->msgs
[i
],
1253 if (ret
!= LDB_SUCCESS
) {
1257 if (cur
!= NULL
&& cur
->force_children
) {
1262 stopped_stack
->stopped_dn
= res
->msgs
[i
]->dn
;
1271 static int descriptor_start_transaction(struct ldb_module
*module
)
1273 struct descriptor_data
*descriptor_private
=
1274 talloc_get_type_abort(ldb_module_get_private(module
),
1275 struct descriptor_data
);
1277 if (descriptor_private
->trans_mem
!= NULL
) {
1278 return ldb_module_operr(module
);
1281 descriptor_private
->trans_mem
= talloc_new(descriptor_private
);
1282 if (descriptor_private
->trans_mem
== NULL
) {
1283 return ldb_module_oom(module
);
1285 descriptor_private
->changes
= NULL
;
1287 return ldb_next_start_trans(module
);
1290 static int descriptor_prepare_commit(struct ldb_module
*module
)
1292 struct descriptor_data
*descriptor_private
=
1293 talloc_get_type_abort(ldb_module_get_private(module
),
1294 struct descriptor_data
);
1295 struct descriptor_changes
*c
, *n
;
1298 for (c
= descriptor_private
->changes
; c
; c
= n
) {
1300 DLIST_REMOVE(descriptor_private
->changes
, c
);
1302 ret
= descriptor_sd_propagation_recursive(module
, c
);
1303 if (ret
== LDB_ERR_NO_SUCH_OBJECT
) {
1306 if (ret
!= LDB_SUCCESS
) {
1311 return ldb_next_prepare_commit(module
);
1314 static int descriptor_end_transaction(struct ldb_module
*module
)
1316 struct descriptor_data
*descriptor_private
=
1317 talloc_get_type_abort(ldb_module_get_private(module
),
1318 struct descriptor_data
);
1320 TALLOC_FREE(descriptor_private
->trans_mem
);
1321 descriptor_private
->changes
= NULL
;
1323 return ldb_next_end_trans(module
);
1326 static int descriptor_del_transaction(struct ldb_module
*module
)
1328 struct descriptor_data
*descriptor_private
=
1329 talloc_get_type_abort(ldb_module_get_private(module
),
1330 struct descriptor_data
);
1332 TALLOC_FREE(descriptor_private
->trans_mem
);
1333 descriptor_private
->changes
= NULL
;
1335 return ldb_next_del_trans(module
);
1338 static const struct ldb_module_ops ldb_descriptor_module_ops
= {
1339 .name
= "descriptor",
1340 .search
= descriptor_search
,
1341 .add
= descriptor_add
,
1342 .modify
= descriptor_modify
,
1343 .rename
= descriptor_rename
,
1344 .init_context
= descriptor_init
,
1345 .extended
= descriptor_extended
,
1346 .start_transaction
= descriptor_start_transaction
,
1347 .prepare_commit
= descriptor_prepare_commit
,
1348 .end_transaction
= descriptor_end_transaction
,
1349 .del_transaction
= descriptor_del_transaction
,
1352 int ldb_descriptor_module_init(const char *version
)
1354 LDB_MODULE_CHECK_VERSION(version
);
1355 return ldb_register_module(&ldb_descriptor_module_ops
);