4 Copyright (C) Simo Sorce 2006-2008
5 Copyright (C) Nadezhda Ivanova 2009
6 Copyright (C) Anatoliy Atanasov 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: ldb ACL module
27 * Description: Module that performs authorisation access checks based on the
28 * account's security context and the DACL of the object being polled.
29 * Only DACL checks implemented at this point
31 * Authors: Nadezhda Ivanova, Anatoliy Atanasov
35 #include "ldb_module.h"
36 #include "auth/auth.h"
37 #include "libcli/security/security.h"
38 #include "dsdb/samdb/samdb.h"
39 #include "librpc/gen_ndr/ndr_security.h"
40 #include "param/param.h"
41 #include "dsdb/samdb/ldb_modules/util.h"
42 #include "lib/util/tsort.h"
43 #include "system/kerberos.h"
44 #include "auth/kerberos/kerberos.h"
46 struct extended_access_check_attribute
{
48 const uint32_t requires_rights
;
53 const char **password_attrs
;
54 void *cached_schema_ptr
;
55 uint64_t cached_schema_metadata_usn
;
56 uint64_t cached_schema_loaded_usn
;
57 const char **confidential_attrs
;
61 struct ldb_module
*module
;
62 struct ldb_request
*req
;
64 bool am_administrator
;
66 bool constructed_attrs
;
67 bool allowedAttributes
;
68 bool allowedAttributesEffective
;
69 bool allowedChildClasses
;
70 bool allowedChildClassesEffective
;
71 bool sDRightsEffective
;
73 const char * const *attrs
;
74 struct dsdb_schema
*schema
;
77 static int acl_module_init(struct ldb_module
*module
)
79 struct ldb_context
*ldb
;
80 struct acl_private
*data
;
84 static const char * const attrs
[] = { "passwordAttribute", NULL
};
85 static const char * const secret_attrs
[] = {
86 DSDB_SECRET_ATTRIBUTES
88 struct ldb_result
*res
;
89 struct ldb_message
*msg
;
90 struct ldb_message_element
*password_attributes
;
92 ldb
= ldb_module_get_ctx(module
);
94 ret
= ldb_mod_register_control(module
, LDB_CONTROL_SD_FLAGS_OID
);
95 if (ret
!= LDB_SUCCESS
) {
96 ldb_debug(ldb
, LDB_DEBUG_ERROR
,
97 "acl_module_init: Unable to register control with rootdse!\n");
98 return ldb_operr(ldb
);
101 data
= talloc_zero(module
, struct acl_private
);
106 data
->acl_search
= lpcfg_parm_bool(ldb_get_opaque(ldb
, "loadparm"),
107 NULL
, "acl", "search", true);
108 ldb_module_set_private(module
, data
);
110 mem_ctx
= talloc_new(module
);
115 ret
= dsdb_module_search_dn(module
, mem_ctx
, &res
,
116 ldb_dn_new(mem_ctx
, ldb
, "@KLUDGEACL"),
118 DSDB_FLAG_NEXT_MODULE
|
121 if (ret
!= LDB_SUCCESS
) {
124 if (res
->count
== 0) {
128 if (res
->count
> 1) {
129 talloc_free(mem_ctx
);
130 return LDB_ERR_CONSTRAINT_VIOLATION
;
135 password_attributes
= ldb_msg_find_element(msg
, "passwordAttribute");
136 if (!password_attributes
) {
139 data
->password_attrs
= talloc_array(data
, const char *,
140 password_attributes
->num_values
+
141 ARRAY_SIZE(secret_attrs
) + 1);
142 if (!data
->password_attrs
) {
143 talloc_free(mem_ctx
);
148 for (i
=0; i
< password_attributes
->num_values
; i
++) {
149 data
->password_attrs
[n
] = (const char *)password_attributes
->values
[i
].data
;
150 talloc_steal(data
->password_attrs
, password_attributes
->values
[i
].data
);
154 for (i
=0; i
< ARRAY_SIZE(secret_attrs
); i
++) {
157 for (j
=0; j
< n
; j
++) {
158 if (strcasecmp(data
->password_attrs
[j
], secret_attrs
[i
]) == 0) {
168 data
->password_attrs
[n
] = talloc_strdup(data
->password_attrs
,
170 if (data
->password_attrs
[n
] == NULL
) {
171 talloc_free(mem_ctx
);
176 data
->password_attrs
[n
] = NULL
;
179 talloc_free(mem_ctx
);
180 return ldb_next_init(module
);
183 static int acl_allowedAttributes(struct ldb_module
*module
,
184 const struct dsdb_schema
*schema
,
185 struct ldb_message
*sd_msg
,
186 struct ldb_message
*msg
,
187 struct acl_context
*ac
)
189 struct ldb_message_element
*oc_el
;
190 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
192 const char **attr_list
;
195 /* If we don't have a schema yet, we can't do anything... */
196 if (schema
== NULL
) {
197 ldb_asprintf_errstring(ldb
, "cannot add allowedAttributes to %s because no schema is loaded", ldb_dn_get_linearized(msg
->dn
));
198 return LDB_ERR_OPERATIONS_ERROR
;
201 /* Must remove any existing attribute */
202 if (ac
->allowedAttributes
) {
203 ldb_msg_remove_attr(msg
, "allowedAttributes");
206 mem_ctx
= talloc_new(msg
);
211 oc_el
= ldb_msg_find_element(sd_msg
, "objectClass");
212 attr_list
= dsdb_full_attribute_list(mem_ctx
, schema
, oc_el
, DSDB_SCHEMA_ALL
);
214 ldb_asprintf_errstring(ldb
, "acl: Failed to get list of attributes");
215 talloc_free(mem_ctx
);
216 return LDB_ERR_OPERATIONS_ERROR
;
218 if (ac
->allowedAttributes
) {
219 for (i
=0; attr_list
&& attr_list
[i
]; i
++) {
220 ldb_msg_add_string(msg
, "allowedAttributes", attr_list
[i
]);
223 if (ac
->allowedAttributesEffective
) {
224 struct security_descriptor
*sd
;
225 struct dom_sid
*sid
= NULL
;
226 struct ldb_control
*as_system
= ldb_request_get_control(ac
->req
,
227 LDB_CONTROL_AS_SYSTEM_OID
);
229 if (as_system
!= NULL
) {
230 as_system
->critical
= 0;
233 ldb_msg_remove_attr(msg
, "allowedAttributesEffective");
234 if (ac
->am_system
|| as_system
) {
235 for (i
=0; attr_list
&& attr_list
[i
]; i
++) {
236 ldb_msg_add_string(msg
, "allowedAttributesEffective", attr_list
[i
]);
241 ret
= dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module
), mem_ctx
, sd_msg
, &sd
);
243 if (ret
!= LDB_SUCCESS
) {
247 sid
= samdb_result_dom_sid(mem_ctx
, sd_msg
, "objectSid");
248 for (i
=0; attr_list
&& attr_list
[i
]; i
++) {
249 const struct dsdb_attribute
*attr
= dsdb_attribute_by_lDAPDisplayName(schema
,
252 return ldb_operr(ldb
);
254 /* remove constructed attributes */
255 if (attr
->systemFlags
& DS_FLAG_ATTR_IS_CONSTRUCTED
257 || (attr
->linkID
!= 0 && attr
->linkID
% 2 != 0 )) {
260 ret
= acl_check_access_on_attribute(module
,
266 if (ret
== LDB_SUCCESS
) {
267 ldb_msg_add_string(msg
, "allowedAttributesEffective", attr_list
[i
]);
274 static int acl_childClasses(struct ldb_module
*module
,
275 const struct dsdb_schema
*schema
,
276 struct ldb_message
*sd_msg
,
277 struct ldb_message
*msg
,
278 const char *attrName
)
280 struct ldb_message_element
*oc_el
;
281 struct ldb_message_element
*allowedClasses
;
282 const struct dsdb_class
*sclass
;
286 /* If we don't have a schema yet, we can't do anything... */
287 if (schema
== NULL
) {
288 ldb_asprintf_errstring(ldb_module_get_ctx(module
), "cannot add childClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg
->dn
));
289 return LDB_ERR_OPERATIONS_ERROR
;
292 /* Must remove any existing attribute, or else confusion reins */
293 ldb_msg_remove_attr(msg
, attrName
);
294 ret
= ldb_msg_add_empty(msg
, attrName
, 0, &allowedClasses
);
295 if (ret
!= LDB_SUCCESS
) {
299 oc_el
= ldb_msg_find_element(sd_msg
, "objectClass");
301 for (i
=0; oc_el
&& i
< oc_el
->num_values
; i
++) {
302 sclass
= dsdb_class_by_lDAPDisplayName_ldb_val(schema
, &oc_el
->values
[i
]);
304 /* We don't know this class? what is going on? */
308 for (j
=0; sclass
->possibleInferiors
&& sclass
->possibleInferiors
[j
]; j
++) {
309 ldb_msg_add_string(msg
, attrName
, sclass
->possibleInferiors
[j
]);
312 if (allowedClasses
->num_values
> 1) {
313 TYPESAFE_QSORT(allowedClasses
->values
, allowedClasses
->num_values
, data_blob_cmp
);
314 for (i
=1 ; i
< allowedClasses
->num_values
; i
++) {
315 struct ldb_val
*val1
= &allowedClasses
->values
[i
-1];
316 struct ldb_val
*val2
= &allowedClasses
->values
[i
];
317 if (data_blob_cmp(val1
, val2
) == 0) {
318 memmove(val1
, val2
, (allowedClasses
->num_values
- i
) * sizeof(struct ldb_val
));
319 allowedClasses
->num_values
--;
328 static int acl_check_access_on_class(struct ldb_module
*module
,
329 const struct dsdb_schema
*schema
,
331 struct security_descriptor
*sd
,
332 struct security_token
*token
,
333 struct dom_sid
*rp_sid
,
334 uint32_t access_mask
,
335 const char *class_name
)
339 uint32_t access_granted
;
340 struct object_tree
*root
= NULL
;
341 struct object_tree
*new_node
= NULL
;
342 const struct GUID
*guid
;
344 if (class_name
!= NULL
) {
345 guid
= class_schemaid_guid_by_lDAPDisplayName(schema
, class_name
);
347 DEBUG(10, ("acl_search: cannot find class %s\n",
351 if (!insert_in_object_tree(mem_ctx
,
354 DEBUG(10, ("acl_search: cannot add to object tree guid\n"));
359 status
= sec_access_check_ds(sd
, token
,
364 if (!NT_STATUS_IS_OK(status
)) {
365 ret
= LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
371 return ldb_operr(ldb_module_get_ctx(module
));
374 static int acl_childClassesEffective(struct ldb_module
*module
,
375 const struct dsdb_schema
*schema
,
376 struct ldb_message
*sd_msg
,
377 struct ldb_message
*msg
,
378 struct acl_context
*ac
)
380 struct ldb_message_element
*oc_el
;
381 struct ldb_message_element
*allowedClasses
= NULL
;
382 const struct dsdb_class
*sclass
;
383 struct security_descriptor
*sd
;
384 struct ldb_control
*as_system
= ldb_request_get_control(ac
->req
,
385 LDB_CONTROL_AS_SYSTEM_OID
);
386 struct dom_sid
*sid
= NULL
;
390 if (as_system
!= NULL
) {
391 as_system
->critical
= 0;
394 if (ac
->am_system
|| as_system
) {
395 return acl_childClasses(module
, schema
, sd_msg
, msg
, "allowedChildClassesEffective");
398 /* If we don't have a schema yet, we can't do anything... */
399 if (schema
== NULL
) {
400 ldb_asprintf_errstring(ldb_module_get_ctx(module
), "cannot add allowedChildClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg
->dn
));
401 return LDB_ERR_OPERATIONS_ERROR
;
404 /* Must remove any existing attribute, or else confusion reins */
405 ldb_msg_remove_attr(msg
, "allowedChildClassesEffective");
407 oc_el
= ldb_msg_find_element(sd_msg
, "objectClass");
408 ret
= dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module
), msg
, sd_msg
, &sd
);
409 if (ret
!= LDB_SUCCESS
) {
413 sid
= samdb_result_dom_sid(msg
, sd_msg
, "objectSid");
414 for (i
=0; oc_el
&& i
< oc_el
->num_values
; i
++) {
415 sclass
= dsdb_class_by_lDAPDisplayName_ldb_val(schema
, &oc_el
->values
[i
]);
417 /* We don't know this class? what is going on? */
421 for (j
=0; sclass
->possibleInferiors
&& sclass
->possibleInferiors
[j
]; j
++) {
422 ret
= acl_check_access_on_class(module
,
426 acl_user_token(module
),
428 SEC_ADS_CREATE_CHILD
,
429 sclass
->possibleInferiors
[j
]);
430 if (ret
== LDB_SUCCESS
) {
431 ldb_msg_add_string(msg
, "allowedChildClassesEffective",
432 sclass
->possibleInferiors
[j
]);
436 allowedClasses
= ldb_msg_find_element(msg
, "allowedChildClassesEffective");
437 if (!allowedClasses
) {
441 if (allowedClasses
->num_values
> 1) {
442 TYPESAFE_QSORT(allowedClasses
->values
, allowedClasses
->num_values
, data_blob_cmp
);
443 for (i
=1 ; i
< allowedClasses
->num_values
; i
++) {
444 struct ldb_val
*val1
= &allowedClasses
->values
[i
-1];
445 struct ldb_val
*val2
= &allowedClasses
->values
[i
];
446 if (data_blob_cmp(val1
, val2
) == 0) {
447 memmove(val1
, val2
, (allowedClasses
->num_values
- i
) * sizeof( struct ldb_val
));
448 allowedClasses
->num_values
--;
456 static int acl_sDRightsEffective(struct ldb_module
*module
,
457 struct ldb_message
*sd_msg
,
458 struct ldb_message
*msg
,
459 struct acl_context
*ac
)
461 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
462 struct ldb_message_element
*rightsEffective
;
464 struct security_descriptor
*sd
;
465 struct ldb_control
*as_system
= ldb_request_get_control(ac
->req
,
466 LDB_CONTROL_AS_SYSTEM_OID
);
467 struct dom_sid
*sid
= NULL
;
470 if (as_system
!= NULL
) {
471 as_system
->critical
= 0;
474 /* Must remove any existing attribute, or else confusion reins */
475 ldb_msg_remove_attr(msg
, "sDRightsEffective");
476 ret
= ldb_msg_add_empty(msg
, "sDRightsEffective", 0, &rightsEffective
);
477 if (ret
!= LDB_SUCCESS
) {
480 if (ac
->am_system
|| as_system
) {
481 flags
= SECINFO_OWNER
| SECINFO_GROUP
| SECINFO_SACL
| SECINFO_DACL
;
484 /* Get the security descriptor from the message */
485 ret
= dsdb_get_sd_from_ldb_message(ldb
, msg
, sd_msg
, &sd
);
486 if (ret
!= LDB_SUCCESS
) {
489 sid
= samdb_result_dom_sid(msg
, sd_msg
, "objectSid");
490 ret
= acl_check_access_on_attribute(module
,
496 if (ret
== LDB_SUCCESS
) {
497 flags
|= SECINFO_OWNER
| SECINFO_GROUP
;
499 ret
= acl_check_access_on_attribute(module
,
505 if (ret
== LDB_SUCCESS
) {
506 flags
|= SECINFO_DACL
;
508 ret
= acl_check_access_on_attribute(module
,
512 SEC_FLAG_SYSTEM_SECURITY
,
514 if (ret
== LDB_SUCCESS
) {
515 flags
|= SECINFO_SACL
;
518 return samdb_msg_add_uint(ldb_module_get_ctx(module
), msg
, msg
,
519 "sDRightsEffective", flags
);
522 static int acl_validate_spn_value(TALLOC_CTX
*mem_ctx
,
523 struct ldb_context
*ldb
,
524 const char *spn_value
,
525 uint32_t userAccountControl
,
526 const char *samAccountName
,
527 const char *dnsHostName
,
528 const char *netbios_name
,
529 const char *ntds_guid
)
532 krb5_context krb_ctx
;
533 krb5_error_code kerr
;
534 krb5_principal principal
;
538 const char *forest_name
= samdb_forest_name(ldb
, mem_ctx
);
539 const char *base_domain
= samdb_default_domain_name(ldb
, mem_ctx
);
540 struct loadparm_context
*lp_ctx
= talloc_get_type(ldb_get_opaque(ldb
, "loadparm"),
541 struct loadparm_context
);
542 bool is_dc
= (userAccountControl
& UF_SERVER_TRUST_ACCOUNT
) ||
543 (userAccountControl
& UF_PARTIAL_SECRETS_ACCOUNT
);
545 if (strcasecmp_m(spn_value
, samAccountName
) == 0) {
546 /* MacOS X sets this value, and setting an SPN of your
547 * own samAccountName is both pointless and safe */
551 kerr
= smb_krb5_init_context_basic(mem_ctx
,
555 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
556 "Could not initialize kerberos context.");
559 ret
= krb5_parse_name(krb_ctx
, spn_value
, &principal
);
561 krb5_free_context(krb_ctx
);
562 return LDB_ERR_CONSTRAINT_VIOLATION
;
565 if (principal
->name
.name_string
.len
< 2) {
569 instanceName
= principal
->name
.name_string
.val
[1];
570 serviceType
= principal
->name
.name_string
.val
[0];
571 if (principal
->name
.name_string
.len
== 3) {
572 serviceName
= principal
->name
.name_string
.val
[2];
581 if (strcasecmp(serviceType
, "ldap") == 0) {
582 if (strcasecmp(serviceName
, netbios_name
) != 0 &&
583 strcasecmp(serviceName
, forest_name
) != 0) {
587 } else if (strcasecmp(serviceType
, "gc") == 0) {
588 if (strcasecmp(serviceName
, forest_name
) != 0) {
592 if (strcasecmp(serviceName
, base_domain
) != 0 &&
593 strcasecmp(serviceName
, netbios_name
) != 0) {
598 /* instanceName can be samAccountName without $ or dnsHostName
599 * or "ntds_guid._msdcs.forest_domain for DC objects */
600 if (strlen(instanceName
) == (strlen(samAccountName
) - 1)
601 && strncasecmp(instanceName
, samAccountName
, strlen(samAccountName
) - 1) == 0) {
603 } else if (dnsHostName
!= NULL
&& strcasecmp(instanceName
, dnsHostName
) == 0) {
606 const char *guid_str
;
607 guid_str
= talloc_asprintf(mem_ctx
,"%s._msdcs.%s",
610 if (strcasecmp(instanceName
, guid_str
) == 0) {
616 krb5_free_principal(krb_ctx
, principal
);
617 krb5_free_context(krb_ctx
);
618 return LDB_ERR_CONSTRAINT_VIOLATION
;
621 krb5_free_principal(krb_ctx
, principal
);
622 krb5_free_context(krb_ctx
);
626 static int acl_check_spn(TALLOC_CTX
*mem_ctx
,
627 struct ldb_module
*module
,
628 struct ldb_request
*req
,
629 struct security_descriptor
*sd
,
631 const struct GUID
*oc_guid
,
632 const struct dsdb_attribute
*attr
)
636 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
637 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
638 struct ldb_result
*acl_res
;
639 struct ldb_result
*netbios_res
;
640 struct ldb_message_element
*el
;
641 struct ldb_dn
*partitions_dn
= samdb_partitions_dn(ldb
, tmp_ctx
);
642 uint32_t userAccountControl
;
643 const char *samAccountName
;
644 const char *dnsHostName
;
645 const char *netbios_name
;
647 char *ntds_guid
= NULL
;
649 static const char *acl_attrs
[] = {
652 "userAccountControl",
655 static const char *netbios_attrs
[] = {
660 /* if we have wp, we can do whatever we like */
661 if (acl_check_access_on_attribute(module
,
666 attr
) == LDB_SUCCESS
) {
667 talloc_free(tmp_ctx
);
671 ret
= acl_check_extended_right(tmp_ctx
, sd
, acl_user_token(module
),
672 GUID_DRS_VALIDATE_SPN
,
676 if (ret
== LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
) {
677 dsdb_acl_debug(sd
, acl_user_token(module
),
678 req
->op
.mod
.message
->dn
,
681 talloc_free(tmp_ctx
);
685 ret
= dsdb_module_search_dn(module
, tmp_ctx
,
686 &acl_res
, req
->op
.mod
.message
->dn
,
688 DSDB_FLAG_NEXT_MODULE
|
689 DSDB_FLAG_AS_SYSTEM
|
690 DSDB_SEARCH_SHOW_RECYCLED
,
692 if (ret
!= LDB_SUCCESS
) {
693 talloc_free(tmp_ctx
);
697 userAccountControl
= ldb_msg_find_attr_as_uint(acl_res
->msgs
[0], "userAccountControl", 0);
698 dnsHostName
= ldb_msg_find_attr_as_string(acl_res
->msgs
[0], "dnsHostName", NULL
);
699 samAccountName
= ldb_msg_find_attr_as_string(acl_res
->msgs
[0], "samAccountName", NULL
);
701 ret
= dsdb_module_search(module
, tmp_ctx
,
702 &netbios_res
, partitions_dn
,
705 DSDB_FLAG_NEXT_MODULE
|
709 ldb_dn_get_linearized(ldb_get_default_basedn(ldb
)));
711 netbios_name
= ldb_msg_find_attr_as_string(netbios_res
->msgs
[0], "nETBIOSName", NULL
);
713 el
= ldb_msg_find_element(req
->op
.mod
.message
, "servicePrincipalName");
715 talloc_free(tmp_ctx
);
716 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
717 "Error finding element for servicePrincipalName.");
720 /* NTDSDSA objectGuid of object we are checking SPN for */
721 if (userAccountControl
& (UF_SERVER_TRUST_ACCOUNT
| UF_PARTIAL_SECRETS_ACCOUNT
)) {
722 ret
= dsdb_module_find_ntdsguid_for_computer(module
, tmp_ctx
,
723 req
->op
.mod
.message
->dn
, &ntds
, req
);
724 if (ret
!= LDB_SUCCESS
) {
725 ldb_asprintf_errstring(ldb
, "Failed to find NTDSDSA objectGuid for %s: %s",
726 ldb_dn_get_linearized(req
->op
.mod
.message
->dn
),
728 talloc_free(tmp_ctx
);
729 return LDB_ERR_OPERATIONS_ERROR
;
731 ntds_guid
= GUID_string(tmp_ctx
, &ntds
);
734 for (i
=0; i
< el
->num_values
; i
++) {
735 ret
= acl_validate_spn_value(tmp_ctx
,
737 (char *)el
->values
[i
].data
,
743 if (ret
!= LDB_SUCCESS
) {
744 talloc_free(tmp_ctx
);
748 talloc_free(tmp_ctx
);
752 static int acl_add(struct ldb_module
*module
, struct ldb_request
*req
)
755 struct ldb_dn
*parent
;
756 struct ldb_context
*ldb
;
757 const struct dsdb_schema
*schema
;
758 struct ldb_message_element
*oc_el
;
759 const struct GUID
*guid
;
760 struct ldb_dn
*nc_root
;
761 struct ldb_control
*as_system
;
763 if (ldb_dn_is_special(req
->op
.add
.message
->dn
)) {
764 return ldb_next_request(module
, req
);
767 as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
768 if (as_system
!= NULL
) {
769 as_system
->critical
= 0;
772 if (dsdb_module_am_system(module
) || as_system
) {
773 return ldb_next_request(module
, req
);
776 ldb
= ldb_module_get_ctx(module
);
778 parent
= ldb_dn_get_parent(req
, req
->op
.add
.message
->dn
);
779 if (parent
== NULL
) {
783 /* Creating an NC. There is probably something we should do here,
784 * but we will establish that later */
786 ret
= dsdb_find_nc_root(ldb
, req
, req
->op
.add
.message
->dn
, &nc_root
);
787 if (ret
!= LDB_SUCCESS
) {
790 if (ldb_dn_compare(nc_root
, req
->op
.add
.message
->dn
) == 0) {
791 talloc_free(nc_root
);
792 return ldb_next_request(module
, req
);
794 talloc_free(nc_root
);
796 schema
= dsdb_get_schema(ldb
, req
);
798 return ldb_operr(ldb
);
801 oc_el
= ldb_msg_find_element(req
->op
.add
.message
, "objectClass");
802 if (!oc_el
|| oc_el
->num_values
== 0) {
803 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
804 "acl: unable to find objectClass on %s\n",
805 ldb_dn_get_linearized(req
->op
.add
.message
->dn
));
806 return ldb_module_done(req
, NULL
, NULL
, LDB_ERR_OPERATIONS_ERROR
);
809 guid
= class_schemaid_guid_by_lDAPDisplayName(schema
,
810 (char *)oc_el
->values
[oc_el
->num_values
-1].data
);
811 ret
= dsdb_module_check_access_on_dn(module
, req
, parent
, SEC_ADS_CREATE_CHILD
, guid
, req
);
812 if (ret
!= LDB_SUCCESS
) {
815 return ldb_next_request(module
, req
);
818 /* ckecks if modifications are allowed on "Member" attribute */
819 static int acl_check_self_membership(TALLOC_CTX
*mem_ctx
,
820 struct ldb_module
*module
,
821 struct ldb_request
*req
,
822 struct security_descriptor
*sd
,
824 const struct GUID
*oc_guid
,
825 const struct dsdb_attribute
*attr
)
829 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
830 struct ldb_dn
*user_dn
;
831 struct ldb_message_element
*member_el
;
832 /* if we have wp, we can do whatever we like */
833 if (acl_check_access_on_attribute(module
,
838 attr
) == LDB_SUCCESS
) {
841 /* if we are adding/deleting ourselves, check for self membership */
842 ret
= dsdb_find_dn_by_sid(ldb
, mem_ctx
,
843 &acl_user_token(module
)->sids
[PRIMARY_USER_SID_INDEX
],
845 if (ret
!= LDB_SUCCESS
) {
848 member_el
= ldb_msg_find_element(req
->op
.mod
.message
, "member");
850 return ldb_operr(ldb
);
852 /* user can only remove oneself */
853 if (member_el
->num_values
== 0) {
854 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
856 for (i
= 0; i
< member_el
->num_values
; i
++) {
857 if (strcasecmp((const char *)member_el
->values
[i
].data
,
858 ldb_dn_get_extended_linearized(mem_ctx
, user_dn
, 1)) != 0) {
859 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
862 ret
= acl_check_extended_right(mem_ctx
, sd
, acl_user_token(module
),
863 GUID_DRS_SELF_MEMBERSHIP
,
866 if (ret
== LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
) {
867 dsdb_acl_debug(sd
, acl_user_token(module
),
868 req
->op
.mod
.message
->dn
,
875 static int acl_check_password_rights(TALLOC_CTX
*mem_ctx
,
876 struct ldb_module
*module
,
877 struct ldb_request
*req
,
878 struct security_descriptor
*sd
,
880 const struct GUID
*oc_guid
,
883 int ret
= LDB_SUCCESS
;
884 unsigned int del_attr_cnt
= 0, add_attr_cnt
= 0, rep_attr_cnt
= 0;
885 struct ldb_message_element
*el
;
886 struct ldb_message
*msg
;
887 const char *passwordAttrs
[] = { "userPassword", "clearTextPassword",
888 "unicodePwd", "dBCSPwd", NULL
}, **l
;
889 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
891 msg
= ldb_msg_copy_shallow(tmp_ctx
, req
->op
.mod
.message
);
893 return ldb_module_oom(module
);
895 for (l
= passwordAttrs
; *l
!= NULL
; l
++) {
896 if ((!userPassword
) && (ldb_attr_cmp(*l
, "userPassword") == 0)) {
900 while ((el
= ldb_msg_find_element(msg
, *l
)) != NULL
) {
901 if (LDB_FLAG_MOD_TYPE(el
->flags
) == LDB_FLAG_MOD_DELETE
) {
904 if (LDB_FLAG_MOD_TYPE(el
->flags
) == LDB_FLAG_MOD_ADD
) {
907 if (LDB_FLAG_MOD_TYPE(el
->flags
) == LDB_FLAG_MOD_REPLACE
) {
910 ldb_msg_remove_element(msg
, el
);
914 /* single deletes will be handled by the "password_hash" LDB module
915 * later in the stack, so we let it though here */
916 if ((del_attr_cnt
> 0) && (add_attr_cnt
== 0) && (rep_attr_cnt
== 0)) {
917 talloc_free(tmp_ctx
);
921 if (ldb_request_get_control(req
,
922 DSDB_CONTROL_PASSWORD_CHANGE_OID
) != NULL
) {
923 /* The "DSDB_CONTROL_PASSWORD_CHANGE_OID" control means that we
924 * have a user password change and not a set as the message
925 * looks like. In it's value blob it contains the NT and/or LM
926 * hash of the old password specified by the user.
927 * This control is used by the SAMR and "kpasswd" password
928 * change mechanisms. */
929 ret
= acl_check_extended_right(tmp_ctx
, sd
, acl_user_token(module
),
930 GUID_DRS_USER_CHANGE_PASSWORD
,
931 SEC_ADS_CONTROL_ACCESS
,
934 else if (rep_attr_cnt
> 0 || (add_attr_cnt
!= del_attr_cnt
)) {
935 ret
= acl_check_extended_right(tmp_ctx
, sd
, acl_user_token(module
),
936 GUID_DRS_FORCE_CHANGE_PASSWORD
,
937 SEC_ADS_CONTROL_ACCESS
,
940 else if (add_attr_cnt
== 1 && del_attr_cnt
== 1) {
941 ret
= acl_check_extended_right(tmp_ctx
, sd
, acl_user_token(module
),
942 GUID_DRS_USER_CHANGE_PASSWORD
,
943 SEC_ADS_CONTROL_ACCESS
,
945 /* Very strange, but we get constraint violation in this case */
946 if (ret
== LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
) {
947 ret
= LDB_ERR_CONSTRAINT_VIOLATION
;
950 if (ret
!= LDB_SUCCESS
) {
951 dsdb_acl_debug(sd
, acl_user_token(module
),
952 req
->op
.mod
.message
->dn
,
956 talloc_free(tmp_ctx
);
960 static const struct GUID
*get_oc_guid_from_message(const struct dsdb_schema
*schema
,
961 struct ldb_message
*msg
)
963 struct ldb_message_element
*oc_el
;
964 const struct dsdb_class
*object_class
;
966 oc_el
= ldb_msg_find_element(msg
, "objectClass");
971 object_class
= dsdb_get_last_structural_class(schema
, oc_el
);
972 if (object_class
== NULL
) {
976 return &object_class
->schemaIDGUID
;
980 static int acl_modify(struct ldb_module
*module
, struct ldb_request
*req
)
983 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
984 const struct dsdb_schema
*schema
;
986 const struct GUID
*guid
;
987 uint32_t access_granted
;
989 struct ldb_result
*acl_res
;
990 struct security_descriptor
*sd
;
991 struct dom_sid
*sid
= NULL
;
992 struct ldb_control
*as_system
;
995 static const char *acl_attrs
[] = {
996 "nTSecurityDescriptor",
1002 if (ldb_dn_is_special(req
->op
.mod
.message
->dn
)) {
1003 return ldb_next_request(module
, req
);
1006 as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
1007 if (as_system
!= NULL
) {
1008 as_system
->critical
= 0;
1011 /* Don't print this debug statement if elements[0].name is going to be NULL */
1012 if(req
->op
.mod
.message
->num_elements
> 0)
1014 DEBUG(10, ("ldb:acl_modify: %s\n", req
->op
.mod
.message
->elements
[0].name
));
1016 if (dsdb_module_am_system(module
) || as_system
) {
1017 return ldb_next_request(module
, req
);
1020 tmp_ctx
= talloc_new(req
);
1021 if (tmp_ctx
== NULL
) {
1022 return ldb_oom(ldb
);
1025 ret
= dsdb_module_search_dn(module
, tmp_ctx
, &acl_res
, req
->op
.mod
.message
->dn
,
1027 DSDB_FLAG_NEXT_MODULE
|
1028 DSDB_FLAG_AS_SYSTEM
|
1029 DSDB_SEARCH_SHOW_RECYCLED
,
1032 if (ret
!= LDB_SUCCESS
) {
1036 userPassword
= dsdb_user_password_support(module
, req
, req
);
1038 schema
= dsdb_get_schema(ldb
, tmp_ctx
);
1040 talloc_free(tmp_ctx
);
1041 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
1042 "acl_modify: Error obtaining schema.");
1045 ret
= dsdb_get_sd_from_ldb_message(ldb
, tmp_ctx
, acl_res
->msgs
[0], &sd
);
1046 if (ret
!= LDB_SUCCESS
) {
1047 talloc_free(tmp_ctx
);
1048 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
1049 "acl_modify: Error retrieving security descriptor.");
1051 /* Theoretically we pass the check if the object has no sd */
1056 guid
= get_oc_guid_from_message(schema
, acl_res
->msgs
[0]);
1058 talloc_free(tmp_ctx
);
1059 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
1060 "acl_modify: Error retrieving object class GUID.");
1062 sid
= samdb_result_dom_sid(req
, acl_res
->msgs
[0], "objectSid");
1063 for (i
=0; i
< req
->op
.mod
.message
->num_elements
; i
++){
1064 const struct dsdb_attribute
*attr
;
1065 attr
= dsdb_attribute_by_lDAPDisplayName(schema
,
1066 req
->op
.mod
.message
->elements
[i
].name
);
1068 if (ldb_attr_cmp("nTSecurityDescriptor", req
->op
.mod
.message
->elements
[i
].name
) == 0) {
1069 uint32_t sd_flags
= dsdb_request_sd_flags(req
, NULL
);
1070 uint32_t access_mask
= 0;
1072 if (sd_flags
& (SECINFO_OWNER
|SECINFO_GROUP
)) {
1073 access_mask
|= SEC_STD_WRITE_OWNER
;
1075 if (sd_flags
& SECINFO_DACL
) {
1076 access_mask
|= SEC_STD_WRITE_DAC
;
1078 if (sd_flags
& SECINFO_SACL
) {
1079 access_mask
|= SEC_FLAG_SYSTEM_SECURITY
;
1082 status
= sec_access_check_ds(sd
, acl_user_token(module
),
1088 if (!NT_STATUS_IS_OK(status
)) {
1089 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1090 "Object %s has no write dacl access\n",
1091 ldb_dn_get_linearized(req
->op
.mod
.message
->dn
));
1093 acl_user_token(module
),
1094 req
->op
.mod
.message
->dn
,
1097 ret
= LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1101 else if (ldb_attr_cmp("member", req
->op
.mod
.message
->elements
[i
].name
) == 0) {
1102 ret
= acl_check_self_membership(tmp_ctx
,
1109 if (ret
!= LDB_SUCCESS
) {
1113 else if (ldb_attr_cmp("dBCSPwd", req
->op
.mod
.message
->elements
[i
].name
) == 0) {
1114 /* this one is not affected by any rights, we should let it through
1115 so that passwords_hash returns the correct error */
1118 else if (ldb_attr_cmp("unicodePwd", req
->op
.mod
.message
->elements
[i
].name
) == 0 ||
1119 (userPassword
&& ldb_attr_cmp("userPassword", req
->op
.mod
.message
->elements
[i
].name
) == 0) ||
1120 ldb_attr_cmp("clearTextPassword", req
->op
.mod
.message
->elements
[i
].name
) == 0) {
1121 ret
= acl_check_password_rights(tmp_ctx
,
1128 if (ret
!= LDB_SUCCESS
) {
1131 } else if (ldb_attr_cmp("servicePrincipalName", req
->op
.mod
.message
->elements
[i
].name
) == 0) {
1132 ret
= acl_check_spn(tmp_ctx
,
1139 if (ret
!= LDB_SUCCESS
) {
1143 struct object_tree
*root
= NULL
;
1144 struct object_tree
*new_node
= NULL
;
1146 /* This basic attribute existence check with the right errorcode
1147 * is needed since this module is the first one which requests
1148 * schema attribute information.
1149 * The complete attribute checking is done in the
1150 * "objectclass_attrs" module behind this one.
1153 ldb_asprintf_errstring(ldb
, "acl_modify: attribute '%s' on entry '%s' was not found in the schema!",
1154 req
->op
.mod
.message
->elements
[i
].name
,
1155 ldb_dn_get_linearized(req
->op
.mod
.message
->dn
));
1156 ret
= LDB_ERR_NO_SUCH_ATTRIBUTE
;
1160 if (!insert_in_object_tree(tmp_ctx
, guid
, SEC_ADS_WRITE_PROP
,
1161 &root
, &new_node
)) {
1162 talloc_free(tmp_ctx
);
1163 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
1164 "acl_modify: Error adding new node in object tree.");
1167 if (!insert_in_object_tree(tmp_ctx
,
1168 &attr
->attributeSecurityGUID
, SEC_ADS_WRITE_PROP
,
1169 &new_node
, &new_node
)) {
1170 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1171 "acl_modify: cannot add to object tree securityGUID\n");
1172 ret
= LDB_ERR_OPERATIONS_ERROR
;
1176 if (!insert_in_object_tree(tmp_ctx
,
1177 &attr
->schemaIDGUID
, SEC_ADS_WRITE_PROP
, &new_node
, &new_node
)) {
1178 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1179 "acl_modify: cannot add to object tree attributeGUID\n");
1180 ret
= LDB_ERR_OPERATIONS_ERROR
;
1184 status
= sec_access_check_ds(sd
, acl_user_token(module
),
1189 if (!NT_STATUS_IS_OK(status
)) {
1190 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1191 "Object %s has no write property access\n",
1192 ldb_dn_get_linearized(req
->op
.mod
.message
->dn
));
1194 acl_user_token(module
),
1195 req
->op
.mod
.message
->dn
,
1198 ret
= LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1205 talloc_free(tmp_ctx
);
1206 return ldb_next_request(module
, req
);
1208 talloc_free(tmp_ctx
);
1212 /* similar to the modify for the time being.
1213 * We need to consider the special delete tree case, though - TODO */
1214 static int acl_delete(struct ldb_module
*module
, struct ldb_request
*req
)
1217 struct ldb_dn
*parent
;
1218 struct ldb_context
*ldb
;
1219 struct ldb_dn
*nc_root
;
1220 struct ldb_control
*as_system
;
1222 if (ldb_dn_is_special(req
->op
.del
.dn
)) {
1223 return ldb_next_request(module
, req
);
1226 as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
1227 if (as_system
!= NULL
) {
1228 as_system
->critical
= 0;
1231 if (dsdb_module_am_system(module
) || as_system
) {
1232 return ldb_next_request(module
, req
);
1235 DEBUG(10, ("ldb:acl_delete: %s\n", ldb_dn_get_linearized(req
->op
.del
.dn
)));
1237 ldb
= ldb_module_get_ctx(module
);
1239 parent
= ldb_dn_get_parent(req
, req
->op
.del
.dn
);
1240 if (parent
== NULL
) {
1241 return ldb_oom(ldb
);
1244 /* Make sure we aren't deleting a NC */
1246 ret
= dsdb_find_nc_root(ldb
, req
, req
->op
.del
.dn
, &nc_root
);
1247 if (ret
!= LDB_SUCCESS
) {
1250 if (ldb_dn_compare(nc_root
, req
->op
.del
.dn
) == 0) {
1251 talloc_free(nc_root
);
1252 DEBUG(10,("acl:deleting a NC\n"));
1253 /* Windows returns "ERR_UNWILLING_TO_PERFORM */
1254 return ldb_module_done(req
, NULL
, NULL
,
1255 LDB_ERR_UNWILLING_TO_PERFORM
);
1257 talloc_free(nc_root
);
1259 if (ldb_request_get_control(req
, LDB_CONTROL_TREE_DELETE_OID
)) {
1260 ret
= dsdb_module_check_access_on_dn(module
, req
,
1262 SEC_ADS_DELETE_TREE
, NULL
,
1264 if (ret
!= LDB_SUCCESS
) {
1268 return ldb_next_request(module
, req
);
1271 /* First check if we have delete object right */
1272 ret
= dsdb_module_check_access_on_dn(module
, req
, req
->op
.del
.dn
,
1273 SEC_STD_DELETE
, NULL
, req
);
1274 if (ret
== LDB_SUCCESS
) {
1275 return ldb_next_request(module
, req
);
1278 /* Nope, we don't have delete object. Lets check if we have delete
1279 * child on the parent */
1280 ret
= dsdb_module_check_access_on_dn(module
, req
, parent
,
1281 SEC_ADS_DELETE_CHILD
, NULL
, req
);
1282 if (ret
!= LDB_SUCCESS
) {
1286 return ldb_next_request(module
, req
);
1289 static int acl_rename(struct ldb_module
*module
, struct ldb_request
*req
)
1292 struct ldb_dn
*oldparent
;
1293 struct ldb_dn
*newparent
;
1294 const struct dsdb_schema
*schema
;
1295 struct ldb_context
*ldb
;
1296 struct security_descriptor
*sd
= NULL
;
1297 struct dom_sid
*sid
= NULL
;
1298 struct ldb_result
*acl_res
;
1299 const struct GUID
*guid
;
1300 struct ldb_dn
*nc_root
;
1301 struct object_tree
*root
= NULL
;
1302 struct object_tree
*new_node
= NULL
;
1303 struct ldb_control
*as_system
;
1304 TALLOC_CTX
*tmp_ctx
;
1306 uint32_t access_granted
;
1307 const char *rdn_name
;
1308 static const char *acl_attrs
[] = {
1309 "nTSecurityDescriptor",
1315 if (ldb_dn_is_special(req
->op
.rename
.olddn
)) {
1316 return ldb_next_request(module
, req
);
1319 as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
1320 if (as_system
!= NULL
) {
1321 as_system
->critical
= 0;
1324 DEBUG(10, ("ldb:acl_rename: %s\n", ldb_dn_get_linearized(req
->op
.rename
.olddn
)));
1325 if (dsdb_module_am_system(module
) || as_system
) {
1326 return ldb_next_request(module
, req
);
1329 ldb
= ldb_module_get_ctx(module
);
1331 tmp_ctx
= talloc_new(req
);
1332 if (tmp_ctx
== NULL
) {
1333 return ldb_oom(ldb
);
1336 oldparent
= ldb_dn_get_parent(tmp_ctx
, req
->op
.rename
.olddn
);
1337 if (oldparent
== NULL
) {
1338 return ldb_oom(ldb
);
1340 newparent
= ldb_dn_get_parent(tmp_ctx
, req
->op
.rename
.newdn
);
1341 if (newparent
== NULL
) {
1342 return ldb_oom(ldb
);
1345 /* Make sure we aren't renaming/moving a NC */
1347 ret
= dsdb_find_nc_root(ldb
, req
, req
->op
.rename
.olddn
, &nc_root
);
1348 if (ret
!= LDB_SUCCESS
) {
1351 if (ldb_dn_compare(nc_root
, req
->op
.rename
.olddn
) == 0) {
1352 talloc_free(nc_root
);
1353 DEBUG(10,("acl:renaming/moving a NC\n"));
1354 /* Windows returns "ERR_UNWILLING_TO_PERFORM */
1355 return ldb_module_done(req
, NULL
, NULL
,
1356 LDB_ERR_UNWILLING_TO_PERFORM
);
1358 talloc_free(nc_root
);
1360 /* Look for the parent */
1362 ret
= dsdb_module_search_dn(module
, tmp_ctx
, &acl_res
,
1363 req
->op
.rename
.olddn
, acl_attrs
,
1364 DSDB_FLAG_NEXT_MODULE
|
1365 DSDB_FLAG_AS_SYSTEM
|
1366 DSDB_SEARCH_SHOW_RECYCLED
, req
);
1367 /* we sould be able to find the parent */
1368 if (ret
!= LDB_SUCCESS
) {
1369 DEBUG(10,("acl: failed to find object %s\n",
1370 ldb_dn_get_linearized(req
->op
.rename
.olddn
)));
1371 talloc_free(tmp_ctx
);
1375 schema
= dsdb_get_schema(ldb
, acl_res
);
1377 talloc_free(tmp_ctx
);
1378 return ldb_operr(ldb
);
1381 guid
= get_oc_guid_from_message(schema
, acl_res
->msgs
[0]);
1382 if (!insert_in_object_tree(tmp_ctx
, guid
, SEC_ADS_WRITE_PROP
,
1383 &root
, &new_node
)) {
1384 talloc_free(tmp_ctx
);
1385 return ldb_operr(ldb
);
1388 guid
= attribute_schemaid_guid_by_lDAPDisplayName(schema
,
1390 if (!insert_in_object_tree(tmp_ctx
, guid
, SEC_ADS_WRITE_PROP
,
1391 &new_node
, &new_node
)) {
1392 talloc_free(tmp_ctx
);
1393 return ldb_operr(ldb
);
1396 rdn_name
= ldb_dn_get_rdn_name(req
->op
.rename
.olddn
);
1397 if (rdn_name
== NULL
) {
1398 talloc_free(tmp_ctx
);
1399 return ldb_operr(ldb
);
1401 guid
= attribute_schemaid_guid_by_lDAPDisplayName(schema
,
1403 if (!insert_in_object_tree(tmp_ctx
, guid
, SEC_ADS_WRITE_PROP
,
1404 &new_node
, &new_node
)) {
1405 talloc_free(tmp_ctx
);
1406 return ldb_operr(ldb
);
1409 ret
= dsdb_get_sd_from_ldb_message(ldb
, req
, acl_res
->msgs
[0], &sd
);
1411 if (ret
!= LDB_SUCCESS
) {
1412 talloc_free(tmp_ctx
);
1413 return ldb_operr(ldb
);
1415 /* Theoretically we pass the check if the object has no sd */
1417 talloc_free(tmp_ctx
);
1420 sid
= samdb_result_dom_sid(req
, acl_res
->msgs
[0], "objectSid");
1421 status
= sec_access_check_ds(sd
, acl_user_token(module
),
1427 if (!NT_STATUS_IS_OK(status
)) {
1428 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1429 "Object %s has no wp on name\n",
1430 ldb_dn_get_linearized(req
->op
.rename
.olddn
));
1432 acl_user_token(module
),
1433 req
->op
.rename
.olddn
,
1436 talloc_free(tmp_ctx
);
1437 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1440 if (ldb_dn_compare(oldparent
, newparent
) == 0) {
1441 /* regular rename, not move, nothing more to do */
1442 talloc_free(tmp_ctx
);
1443 return ldb_next_request(module
, req
);
1446 /* new parent should have create child */
1449 guid
= get_oc_guid_from_message(schema
, acl_res
->msgs
[0]);
1451 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1452 "acl:renamed object has no object class\n");
1453 talloc_free(tmp_ctx
);
1454 return ldb_module_done(req
, NULL
, NULL
, LDB_ERR_OPERATIONS_ERROR
);
1457 ret
= dsdb_module_check_access_on_dn(module
, req
, newparent
, SEC_ADS_CREATE_CHILD
, guid
, req
);
1458 if (ret
!= LDB_SUCCESS
) {
1459 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1460 "acl:access_denied renaming %s",
1461 ldb_dn_get_linearized(req
->op
.rename
.olddn
));
1462 talloc_free(tmp_ctx
);
1465 /* do we have delete object on the object? */
1467 status
= sec_access_check_ds(sd
, acl_user_token(module
),
1473 if (NT_STATUS_IS_OK(status
)) {
1474 talloc_free(tmp_ctx
);
1475 return ldb_next_request(module
, req
);
1477 /* what about delete child on the current parent */
1478 ret
= dsdb_module_check_access_on_dn(module
, req
, oldparent
, SEC_ADS_DELETE_CHILD
, NULL
, req
);
1479 if (ret
!= LDB_SUCCESS
) {
1480 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1481 "acl:access_denied renaming %s", ldb_dn_get_linearized(req
->op
.rename
.olddn
));
1482 talloc_free(tmp_ctx
);
1483 return ldb_module_done(req
, NULL
, NULL
, ret
);
1486 talloc_free(tmp_ctx
);
1488 return ldb_next_request(module
, req
);
1491 static int acl_search_update_confidential_attrs(struct acl_context
*ac
,
1492 struct acl_private
*data
)
1494 struct dsdb_attribute
*a
;
1497 if (data
->acl_search
) {
1499 * If acl:search is activated, the acl_read module
1500 * protects confidential attributes.
1505 if ((ac
->schema
== data
->cached_schema_ptr
) &&
1506 (ac
->schema
->loaded_usn
== data
->cached_schema_loaded_usn
) &&
1507 (ac
->schema
->metadata_usn
== data
->cached_schema_metadata_usn
))
1512 data
->cached_schema_ptr
= NULL
;
1513 data
->cached_schema_loaded_usn
= 0;
1514 data
->cached_schema_metadata_usn
= 0;
1515 TALLOC_FREE(data
->confidential_attrs
);
1517 if (ac
->schema
== NULL
) {
1521 for (a
= ac
->schema
->attributes
; a
; a
= a
->next
) {
1522 const char **attrs
= data
->confidential_attrs
;
1524 if (!(a
->searchFlags
& SEARCH_FLAG_CONFIDENTIAL
)) {
1528 attrs
= talloc_realloc(data
, attrs
, const char *, n
+ 2);
1529 if (attrs
== NULL
) {
1530 TALLOC_FREE(data
->confidential_attrs
);
1531 return ldb_module_oom(ac
->module
);
1534 attrs
[n
] = a
->lDAPDisplayName
;
1538 data
->confidential_attrs
= attrs
;
1541 data
->cached_schema_ptr
= ac
->schema
;
1542 data
->cached_schema_loaded_usn
= ac
->schema
->loaded_usn
;
1543 data
->cached_schema_metadata_usn
= ac
->schema
->metadata_usn
;
1548 static int acl_search_callback(struct ldb_request
*req
, struct ldb_reply
*ares
)
1550 struct acl_context
*ac
;
1551 struct acl_private
*data
;
1552 struct ldb_result
*acl_res
;
1553 static const char *acl_attrs
[] = {
1555 "nTSecurityDescriptor",
1562 ac
= talloc_get_type(req
->context
, struct acl_context
);
1563 data
= talloc_get_type(ldb_module_get_private(ac
->module
), struct acl_private
);
1565 return ldb_module_done(ac
->req
, NULL
, NULL
,
1566 LDB_ERR_OPERATIONS_ERROR
);
1568 if (ares
->error
!= LDB_SUCCESS
) {
1569 return ldb_module_done(ac
->req
, ares
->controls
,
1570 ares
->response
, ares
->error
);
1573 switch (ares
->type
) {
1574 case LDB_REPLY_ENTRY
:
1575 if (ac
->constructed_attrs
) {
1576 ret
= dsdb_module_search_dn(ac
->module
, ac
, &acl_res
, ares
->message
->dn
,
1578 DSDB_FLAG_NEXT_MODULE
|
1579 DSDB_FLAG_AS_SYSTEM
|
1580 DSDB_SEARCH_SHOW_RECYCLED
,
1582 if (ret
!= LDB_SUCCESS
) {
1583 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1587 if (ac
->allowedAttributes
|| ac
->allowedAttributesEffective
) {
1588 ret
= acl_allowedAttributes(ac
->module
, ac
->schema
,
1591 if (ret
!= LDB_SUCCESS
) {
1592 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1596 if (ac
->allowedChildClasses
) {
1597 ret
= acl_childClasses(ac
->module
, ac
->schema
,
1600 "allowedChildClasses");
1601 if (ret
!= LDB_SUCCESS
) {
1602 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1606 if (ac
->allowedChildClassesEffective
) {
1607 ret
= acl_childClassesEffective(ac
->module
, ac
->schema
,
1610 if (ret
!= LDB_SUCCESS
) {
1611 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1615 if (ac
->sDRightsEffective
) {
1616 ret
= acl_sDRightsEffective(ac
->module
,
1619 if (ret
!= LDB_SUCCESS
) {
1620 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1625 return ldb_module_send_entry(ac
->req
, ares
->message
,
1629 if (ac
->am_system
) {
1630 return ldb_module_send_entry(ac
->req
, ares
->message
,
1634 if (data
->password_attrs
!= NULL
) {
1635 for (i
= 0; data
->password_attrs
[i
]; i
++) {
1636 if ((!ac
->userPassword
) &&
1637 (ldb_attr_cmp(data
->password_attrs
[i
],
1638 "userPassword") == 0))
1643 ldb_msg_remove_attr(ares
->message
, data
->password_attrs
[i
]);
1647 if (ac
->am_administrator
) {
1648 return ldb_module_send_entry(ac
->req
, ares
->message
,
1652 ret
= acl_search_update_confidential_attrs(ac
, data
);
1653 if (ret
!= LDB_SUCCESS
) {
1657 if (data
->confidential_attrs
!= NULL
) {
1658 for (i
= 0; data
->confidential_attrs
[i
]; i
++) {
1659 ldb_msg_remove_attr(ares
->message
,
1660 data
->confidential_attrs
[i
]);
1664 return ldb_module_send_entry(ac
->req
, ares
->message
, ares
->controls
);
1666 case LDB_REPLY_REFERRAL
:
1667 return ldb_module_send_referral(ac
->req
, ares
->referral
);
1669 case LDB_REPLY_DONE
:
1670 return ldb_module_done(ac
->req
, ares
->controls
,
1671 ares
->response
, LDB_SUCCESS
);
1677 static int acl_search(struct ldb_module
*module
, struct ldb_request
*req
)
1679 struct ldb_context
*ldb
;
1680 struct acl_context
*ac
;
1681 struct ldb_parse_tree
*down_tree
;
1682 struct ldb_request
*down_req
;
1683 struct acl_private
*data
;
1687 if (ldb_dn_is_special(req
->op
.search
.base
)) {
1688 return ldb_next_request(module
, req
);
1691 ldb
= ldb_module_get_ctx(module
);
1693 ac
= talloc_zero(req
, struct acl_context
);
1695 return ldb_oom(ldb
);
1697 data
= talloc_get_type(ldb_module_get_private(module
), struct acl_private
);
1699 ac
->module
= module
;
1701 ac
->am_system
= dsdb_module_am_system(module
);
1702 ac
->am_administrator
= dsdb_module_am_administrator(module
);
1703 ac
->constructed_attrs
= false;
1704 ac
->modify_search
= true;
1705 ac
->allowedAttributes
= ldb_attr_in_list(req
->op
.search
.attrs
, "allowedAttributes");
1706 ac
->allowedAttributesEffective
= ldb_attr_in_list(req
->op
.search
.attrs
, "allowedAttributesEffective");
1707 ac
->allowedChildClasses
= ldb_attr_in_list(req
->op
.search
.attrs
, "allowedChildClasses");
1708 ac
->allowedChildClassesEffective
= ldb_attr_in_list(req
->op
.search
.attrs
, "allowedChildClassesEffective");
1709 ac
->sDRightsEffective
= ldb_attr_in_list(req
->op
.search
.attrs
, "sDRightsEffective");
1710 ac
->userPassword
= true;
1711 ac
->schema
= dsdb_get_schema(ldb
, ac
);
1713 ac
->constructed_attrs
|= ac
->allowedAttributes
;
1714 ac
->constructed_attrs
|= ac
->allowedChildClasses
;
1715 ac
->constructed_attrs
|= ac
->allowedChildClassesEffective
;
1716 ac
->constructed_attrs
|= ac
->allowedAttributesEffective
;
1717 ac
->constructed_attrs
|= ac
->sDRightsEffective
;
1720 ac
->modify_search
= false;
1722 if (ac
->am_system
) {
1723 ac
->modify_search
= false;
1726 if (!ac
->constructed_attrs
&& !ac
->modify_search
) {
1728 return ldb_next_request(module
, req
);
1731 if (!ac
->am_system
) {
1732 ac
->userPassword
= dsdb_user_password_support(module
, ac
, req
);
1735 ret
= acl_search_update_confidential_attrs(ac
, data
);
1736 if (ret
!= LDB_SUCCESS
) {
1740 down_tree
= ldb_parse_tree_copy_shallow(ac
, req
->op
.search
.tree
);
1741 if (down_tree
== NULL
) {
1742 return ldb_oom(ldb
);
1745 if (!ac
->am_system
&& data
->password_attrs
) {
1746 for (i
= 0; data
->password_attrs
[i
]; i
++) {
1747 if ((!ac
->userPassword
) &&
1748 (ldb_attr_cmp(data
->password_attrs
[i
],
1749 "userPassword") == 0))
1754 ldb_parse_tree_attr_replace(down_tree
,
1755 data
->password_attrs
[i
],
1756 "kludgeACLredactedattribute");
1760 if (!ac
->am_system
&& !ac
->am_administrator
&& data
->confidential_attrs
) {
1761 for (i
= 0; data
->confidential_attrs
[i
]; i
++) {
1762 ldb_parse_tree_attr_replace(down_tree
,
1763 data
->confidential_attrs
[i
],
1764 "kludgeACLredactedattribute");
1768 ret
= ldb_build_search_req_ex(&down_req
,
1770 req
->op
.search
.base
,
1771 req
->op
.search
.scope
,
1773 req
->op
.search
.attrs
,
1775 ac
, acl_search_callback
,
1777 LDB_REQ_SET_LOCATION(down_req
);
1778 if (ret
!= LDB_SUCCESS
) {
1781 /* perform the search */
1782 return ldb_next_request(module
, down_req
);
1785 static int acl_extended(struct ldb_module
*module
, struct ldb_request
*req
)
1787 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
1788 struct ldb_control
*as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
1790 /* allow everybody to read the sequence number */
1791 if (strcmp(req
->op
.extended
.oid
,
1792 LDB_EXTENDED_SEQUENCE_NUMBER
) == 0) {
1793 return ldb_next_request(module
, req
);
1796 if (dsdb_module_am_system(module
) ||
1797 dsdb_module_am_administrator(module
) || as_system
) {
1798 return ldb_next_request(module
, req
);
1800 ldb_asprintf_errstring(ldb
,
1802 "attempted database modify not permitted. "
1803 "User %s is not SYSTEM or an administrator",
1804 acl_user_name(req
, module
));
1805 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1809 static const struct ldb_module_ops ldb_acl_module_ops
= {
1811 .search
= acl_search
,
1813 .modify
= acl_modify
,
1815 .rename
= acl_rename
,
1816 .extended
= acl_extended
,
1817 .init_context
= acl_module_init
1820 int ldb_acl_module_init(const char *version
)
1822 LDB_MODULE_CHECK_VERSION(version
);
1823 return ldb_register_module(&ldb_acl_module_ops
);