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
;
57 struct ldb_module
*module
;
58 struct ldb_request
*req
;
60 bool allowedAttributes
;
61 bool allowedAttributesEffective
;
62 bool allowedChildClasses
;
63 bool allowedChildClassesEffective
;
64 bool sDRightsEffective
;
66 const char * const *attrs
;
67 struct dsdb_schema
*schema
;
70 static int acl_module_init(struct ldb_module
*module
)
72 struct ldb_context
*ldb
;
73 struct acl_private
*data
;
77 static const char *attrs
[] = { "passwordAttribute", NULL
};
78 struct ldb_result
*res
;
79 struct ldb_message
*msg
;
80 struct ldb_message_element
*password_attributes
;
82 ldb
= ldb_module_get_ctx(module
);
84 ret
= ldb_mod_register_control(module
, LDB_CONTROL_SD_FLAGS_OID
);
85 if (ret
!= LDB_SUCCESS
) {
86 ldb_debug(ldb
, LDB_DEBUG_ERROR
,
87 "acl_module_init: Unable to register control with rootdse!\n");
88 return ldb_operr(ldb
);
91 data
= talloc(module
, struct acl_private
);
96 data
->password_attrs
= NULL
;
97 data
->acl_perform
= lpcfg_parm_bool(ldb_get_opaque(ldb
, "loadparm"),
98 NULL
, "acl", "perform", false);
99 ldb_module_set_private(module
, data
);
101 mem_ctx
= talloc_new(module
);
106 ret
= dsdb_module_search_dn(module
, mem_ctx
, &res
,
107 ldb_dn_new(mem_ctx
, ldb
, "@KLUDGEACL"),
109 DSDB_FLAG_NEXT_MODULE
, NULL
);
110 if (ret
!= LDB_SUCCESS
) {
113 if (res
->count
== 0) {
117 if (res
->count
> 1) {
118 talloc_free(mem_ctx
);
119 return LDB_ERR_CONSTRAINT_VIOLATION
;
124 password_attributes
= ldb_msg_find_element(msg
, "passwordAttribute");
125 if (!password_attributes
) {
128 data
->password_attrs
= talloc_array(data
, const char *, password_attributes
->num_values
+ 1);
129 if (!data
->password_attrs
) {
130 talloc_free(mem_ctx
);
133 for (i
=0; i
< password_attributes
->num_values
; i
++) {
134 data
->password_attrs
[i
] = (const char *)password_attributes
->values
[i
].data
;
135 talloc_steal(data
->password_attrs
, password_attributes
->values
[i
].data
);
137 data
->password_attrs
[i
] = NULL
;
140 talloc_free(mem_ctx
);
141 return ldb_next_init(module
);
144 static int acl_allowedAttributes(struct ldb_module
*module
,
145 const struct dsdb_schema
*schema
,
146 struct ldb_message
*sd_msg
,
147 struct ldb_message
*msg
,
148 struct acl_context
*ac
)
150 struct ldb_message_element
*oc_el
;
151 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
153 const char **attr_list
;
156 /* If we don't have a schema yet, we can't do anything... */
157 if (schema
== NULL
) {
158 ldb_asprintf_errstring(ldb
, "cannot add allowedAttributes to %s because no schema is loaded", ldb_dn_get_linearized(msg
->dn
));
159 return LDB_ERR_OPERATIONS_ERROR
;
162 /* Must remove any existing attribute */
163 if (ac
->allowedAttributes
) {
164 ldb_msg_remove_attr(msg
, "allowedAttributes");
167 mem_ctx
= talloc_new(msg
);
172 oc_el
= ldb_msg_find_element(sd_msg
, "objectClass");
173 attr_list
= dsdb_full_attribute_list(mem_ctx
, schema
, oc_el
, DSDB_SCHEMA_ALL
);
175 ldb_asprintf_errstring(ldb
, "acl: Failed to get list of attributes");
176 talloc_free(mem_ctx
);
177 return LDB_ERR_OPERATIONS_ERROR
;
179 if (ac
->allowedAttributes
) {
180 for (i
=0; attr_list
&& attr_list
[i
]; i
++) {
181 ldb_msg_add_string(msg
, "allowedAttributes", attr_list
[i
]);
184 if (ac
->allowedAttributesEffective
) {
185 struct security_descriptor
*sd
;
186 struct dom_sid
*sid
= NULL
;
187 struct ldb_control
*as_system
= ldb_request_get_control(ac
->req
,
188 LDB_CONTROL_AS_SYSTEM_OID
);
190 if (as_system
!= NULL
) {
191 as_system
->critical
= 0;
194 ldb_msg_remove_attr(msg
, "allowedAttributesEffective");
195 if (ac
->am_system
|| as_system
) {
196 for (i
=0; attr_list
&& attr_list
[i
]; i
++) {
197 ldb_msg_add_string(msg
, "allowedAttributesEffective", attr_list
[i
]);
202 ret
= dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module
), mem_ctx
, sd_msg
, &sd
);
204 if (ret
!= LDB_SUCCESS
) {
208 sid
= samdb_result_dom_sid(mem_ctx
, sd_msg
, "objectSid");
209 for (i
=0; attr_list
&& attr_list
[i
]; i
++) {
210 const struct dsdb_attribute
*attr
= dsdb_attribute_by_lDAPDisplayName(schema
,
213 return ldb_operr(ldb
);
215 /* remove constructed attributes */
216 if (attr
->systemFlags
& DS_FLAG_ATTR_IS_CONSTRUCTED
218 || (attr
->linkID
!= 0 && attr
->linkID
% 2 != 0 )) {
221 ret
= acl_check_access_on_attribute(module
,
227 if (ret
== LDB_SUCCESS
) {
228 ldb_msg_add_string(msg
, "allowedAttributesEffective", attr_list
[i
]);
235 static int acl_childClasses(struct ldb_module
*module
,
236 const struct dsdb_schema
*schema
,
237 struct ldb_message
*sd_msg
,
238 struct ldb_message
*msg
,
239 const char *attrName
)
241 struct ldb_message_element
*oc_el
;
242 struct ldb_message_element
*allowedClasses
;
243 const struct dsdb_class
*sclass
;
247 /* If we don't have a schema yet, we can't do anything... */
248 if (schema
== NULL
) {
249 ldb_asprintf_errstring(ldb_module_get_ctx(module
), "cannot add childClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg
->dn
));
250 return LDB_ERR_OPERATIONS_ERROR
;
253 /* Must remove any existing attribute, or else confusion reins */
254 ldb_msg_remove_attr(msg
, attrName
);
255 ret
= ldb_msg_add_empty(msg
, attrName
, 0, &allowedClasses
);
256 if (ret
!= LDB_SUCCESS
) {
260 oc_el
= ldb_msg_find_element(sd_msg
, "objectClass");
262 for (i
=0; oc_el
&& i
< oc_el
->num_values
; i
++) {
263 sclass
= dsdb_class_by_lDAPDisplayName_ldb_val(schema
, &oc_el
->values
[i
]);
265 /* We don't know this class? what is going on? */
269 for (j
=0; sclass
->possibleInferiors
&& sclass
->possibleInferiors
[j
]; j
++) {
270 ldb_msg_add_string(msg
, attrName
, sclass
->possibleInferiors
[j
]);
273 if (allowedClasses
->num_values
> 1) {
274 TYPESAFE_QSORT(allowedClasses
->values
, allowedClasses
->num_values
, data_blob_cmp
);
275 for (i
=1 ; i
< allowedClasses
->num_values
; i
++) {
276 struct ldb_val
*val1
= &allowedClasses
->values
[i
-1];
277 struct ldb_val
*val2
= &allowedClasses
->values
[i
];
278 if (data_blob_cmp(val1
, val2
) == 0) {
279 memmove(val1
, val2
, (allowedClasses
->num_values
- i
) * sizeof(struct ldb_val
));
280 allowedClasses
->num_values
--;
289 static int acl_check_access_on_class(struct ldb_module
*module
,
290 const struct dsdb_schema
*schema
,
292 struct security_descriptor
*sd
,
293 struct security_token
*token
,
294 struct dom_sid
*rp_sid
,
295 uint32_t access_mask
,
296 const char *class_name
)
300 uint32_t access_granted
;
301 struct object_tree
*root
= NULL
;
302 struct object_tree
*new_node
= NULL
;
303 const struct GUID
*guid
;
305 if (class_name
!= NULL
) {
306 guid
= class_schemaid_guid_by_lDAPDisplayName(schema
, class_name
);
308 DEBUG(10, ("acl_search: cannot find class %s\n",
312 if (!insert_in_object_tree(mem_ctx
,
315 DEBUG(10, ("acl_search: cannot add to object tree guid\n"));
320 status
= sec_access_check_ds(sd
, token
,
325 if (!NT_STATUS_IS_OK(status
)) {
326 ret
= LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
332 return ldb_operr(ldb_module_get_ctx(module
));
335 static int acl_childClassesEffective(struct ldb_module
*module
,
336 const struct dsdb_schema
*schema
,
337 struct ldb_message
*sd_msg
,
338 struct ldb_message
*msg
,
339 struct acl_context
*ac
)
341 struct ldb_message_element
*oc_el
;
342 struct ldb_message_element
*allowedClasses
= NULL
;
343 const struct dsdb_class
*sclass
;
344 struct security_descriptor
*sd
;
345 struct ldb_control
*as_system
= ldb_request_get_control(ac
->req
,
346 LDB_CONTROL_AS_SYSTEM_OID
);
347 struct dom_sid
*sid
= NULL
;
351 if (as_system
!= NULL
) {
352 as_system
->critical
= 0;
355 if (ac
->am_system
|| as_system
) {
356 return acl_childClasses(module
, schema
, sd_msg
, msg
, "allowedChildClassesEffective");
359 /* If we don't have a schema yet, we can't do anything... */
360 if (schema
== NULL
) {
361 ldb_asprintf_errstring(ldb_module_get_ctx(module
), "cannot add allowedChildClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg
->dn
));
362 return LDB_ERR_OPERATIONS_ERROR
;
365 /* Must remove any existing attribute, or else confusion reins */
366 ldb_msg_remove_attr(msg
, "allowedChildClassesEffective");
368 oc_el
= ldb_msg_find_element(sd_msg
, "objectClass");
369 ret
= dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module
), msg
, sd_msg
, &sd
);
370 if (ret
!= LDB_SUCCESS
) {
374 sid
= samdb_result_dom_sid(msg
, sd_msg
, "objectSid");
375 for (i
=0; oc_el
&& i
< oc_el
->num_values
; i
++) {
376 sclass
= dsdb_class_by_lDAPDisplayName_ldb_val(schema
, &oc_el
->values
[i
]);
378 /* We don't know this class? what is going on? */
382 for (j
=0; sclass
->possibleInferiors
&& sclass
->possibleInferiors
[j
]; j
++) {
383 ret
= acl_check_access_on_class(module
,
387 acl_user_token(module
),
389 SEC_ADS_CREATE_CHILD
,
390 sclass
->possibleInferiors
[j
]);
391 if (ret
== LDB_SUCCESS
) {
392 ldb_msg_add_string(msg
, "allowedChildClassesEffective",
393 sclass
->possibleInferiors
[j
]);
397 allowedClasses
= ldb_msg_find_element(msg
, "allowedChildClassesEffective");
398 if (!allowedClasses
) {
402 if (allowedClasses
->num_values
> 1) {
403 TYPESAFE_QSORT(allowedClasses
->values
, allowedClasses
->num_values
, data_blob_cmp
);
404 for (i
=1 ; i
< allowedClasses
->num_values
; i
++) {
405 struct ldb_val
*val1
= &allowedClasses
->values
[i
-1];
406 struct ldb_val
*val2
= &allowedClasses
->values
[i
];
407 if (data_blob_cmp(val1
, val2
) == 0) {
408 memmove(val1
, val2
, (allowedClasses
->num_values
- i
) * sizeof( struct ldb_val
));
409 allowedClasses
->num_values
--;
417 static int acl_sDRightsEffective(struct ldb_module
*module
,
418 struct ldb_message
*sd_msg
,
419 struct ldb_message
*msg
,
420 struct acl_context
*ac
)
422 struct ldb_message_element
*rightsEffective
;
424 struct security_descriptor
*sd
;
425 struct ldb_control
*as_system
= ldb_request_get_control(ac
->req
,
426 LDB_CONTROL_AS_SYSTEM_OID
);
427 struct dom_sid
*sid
= NULL
;
430 if (as_system
!= NULL
) {
431 as_system
->critical
= 0;
434 /* Must remove any existing attribute, or else confusion reins */
435 ldb_msg_remove_attr(msg
, "sDRightsEffective");
436 ret
= ldb_msg_add_empty(msg
, "sDRightsEffective", 0, &rightsEffective
);
437 if (ret
!= LDB_SUCCESS
) {
440 if (ac
->am_system
|| as_system
) {
441 flags
= SECINFO_OWNER
| SECINFO_GROUP
| SECINFO_SACL
| SECINFO_DACL
;
444 /* Get the security descriptor from the message */
445 ret
= dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module
), msg
, sd_msg
, &sd
);
446 if (ret
!= LDB_SUCCESS
) {
449 sid
= samdb_result_dom_sid(msg
, sd_msg
, "objectSid");
450 ret
= acl_check_access_on_attribute(module
,
456 if (ret
== LDB_SUCCESS
) {
457 flags
|= SECINFO_OWNER
| SECINFO_GROUP
;
459 ret
= acl_check_access_on_attribute(module
,
465 if (ret
== LDB_SUCCESS
) {
466 flags
|= SECINFO_DACL
;
468 ret
= acl_check_access_on_attribute(module
,
472 SEC_FLAG_SYSTEM_SECURITY
,
474 if (ret
== LDB_SUCCESS
) {
475 flags
|= SECINFO_SACL
;
478 return samdb_msg_add_uint(ldb_module_get_ctx(module
), msg
, msg
,
479 "sDRightsEffective", flags
);
482 static int acl_validate_spn_value(TALLOC_CTX
*mem_ctx
,
483 struct ldb_context
*ldb
,
484 const char *spn_value
,
485 uint32_t userAccountControl
,
486 const char *samAccountName
,
487 const char *dnsHostName
,
488 const char *netbios_name
,
489 const char *ntds_guid
)
492 krb5_context krb_ctx
;
493 krb5_error_code kerr
;
494 krb5_principal principal
;
498 const char *forest_name
= samdb_forest_name(ldb
, mem_ctx
);
499 const char *base_domain
= samdb_default_domain_name(ldb
, mem_ctx
);
500 struct loadparm_context
*lp_ctx
= talloc_get_type(ldb_get_opaque(ldb
, "loadparm"),
501 struct loadparm_context
);
502 bool is_dc
= (userAccountControl
& UF_SERVER_TRUST_ACCOUNT
) ||
503 (userAccountControl
& UF_PARTIAL_SECRETS_ACCOUNT
);
505 if (strcasecmp_m(spn_value
, samAccountName
) == 0) {
506 /* MacOS X sets this value, and setting an SPN of your
507 * own samAccountName is both pointless and safe */
511 kerr
= smb_krb5_init_context_basic(mem_ctx
,
515 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
516 "Could not initialize kerberos context.");
519 ret
= krb5_parse_name(krb_ctx
, spn_value
, &principal
);
521 krb5_free_context(krb_ctx
);
522 return LDB_ERR_CONSTRAINT_VIOLATION
;
525 if (principal
->name
.name_string
.len
< 2) {
529 instanceName
= principal
->name
.name_string
.val
[1];
530 serviceType
= principal
->name
.name_string
.val
[0];
531 if (principal
->name
.name_string
.len
== 3) {
532 serviceName
= principal
->name
.name_string
.val
[2];
541 if (strcasecmp(serviceType
, "ldap") == 0) {
542 if (strcasecmp(serviceName
, netbios_name
) != 0 &&
543 strcasecmp(serviceName
, forest_name
) != 0) {
547 } else if (strcasecmp(serviceType
, "gc") == 0) {
548 if (strcasecmp(serviceName
, forest_name
) != 0) {
552 if (strcasecmp(serviceName
, base_domain
) != 0 &&
553 strcasecmp(serviceName
, netbios_name
) != 0) {
558 /* instanceName can be samAccountName without $ or dnsHostName
559 * or "ntds_guid._msdcs.forest_domain for DC objects */
560 if (strlen(instanceName
) == (strlen(samAccountName
) - 1)
561 && strncasecmp(instanceName
, samAccountName
, strlen(samAccountName
) - 1) == 0) {
563 } else if (dnsHostName
!= NULL
&& strcasecmp(instanceName
, dnsHostName
) == 0) {
566 const char *guid_str
;
567 guid_str
= talloc_asprintf(mem_ctx
,"%s._msdcs.%s",
570 if (strcasecmp(instanceName
, guid_str
) == 0) {
576 krb5_free_principal(krb_ctx
, principal
);
577 krb5_free_context(krb_ctx
);
578 return LDB_ERR_CONSTRAINT_VIOLATION
;
581 krb5_free_principal(krb_ctx
, principal
);
582 krb5_free_context(krb_ctx
);
586 static int acl_check_spn(TALLOC_CTX
*mem_ctx
,
587 struct ldb_module
*module
,
588 struct ldb_request
*req
,
589 struct security_descriptor
*sd
,
591 const struct GUID
*oc_guid
,
592 const struct dsdb_attribute
*attr
)
596 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
597 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
598 struct ldb_result
*acl_res
;
599 struct ldb_result
*netbios_res
;
600 struct ldb_message_element
*el
;
601 struct ldb_dn
*partitions_dn
= samdb_partitions_dn(ldb
, tmp_ctx
);
602 uint32_t userAccountControl
;
603 const char *samAccountName
;
604 const char *dnsHostName
;
605 const char *netbios_name
;
607 char *ntds_guid
= NULL
;
609 static const char *acl_attrs
[] = {
612 "userAccountControl",
615 static const char *netbios_attrs
[] = {
620 /* if we have wp, we can do whatever we like */
621 if (acl_check_access_on_attribute(module
,
626 attr
) == LDB_SUCCESS
) {
627 talloc_free(tmp_ctx
);
631 ret
= acl_check_extended_right(tmp_ctx
, sd
, acl_user_token(module
),
632 GUID_DRS_VALIDATE_SPN
,
636 if (ret
== LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
) {
637 dsdb_acl_debug(sd
, acl_user_token(module
),
638 req
->op
.mod
.message
->dn
,
641 talloc_free(tmp_ctx
);
645 ret
= dsdb_module_search_dn(module
, tmp_ctx
,
646 &acl_res
, req
->op
.mod
.message
->dn
,
648 DSDB_FLAG_NEXT_MODULE
|
649 DSDB_SEARCH_SHOW_DELETED
, req
);
650 if (ret
!= LDB_SUCCESS
) {
651 talloc_free(tmp_ctx
);
655 userAccountControl
= ldb_msg_find_attr_as_uint(acl_res
->msgs
[0], "userAccountControl", 0);
656 dnsHostName
= ldb_msg_find_attr_as_string(acl_res
->msgs
[0], "dnsHostName", NULL
);
657 samAccountName
= ldb_msg_find_attr_as_string(acl_res
->msgs
[0], "samAccountName", NULL
);
659 ret
= dsdb_module_search(module
, tmp_ctx
,
660 &netbios_res
, partitions_dn
,
663 DSDB_FLAG_NEXT_MODULE
,
666 ldb_dn_get_linearized(ldb_get_default_basedn(ldb
)));
668 netbios_name
= ldb_msg_find_attr_as_string(netbios_res
->msgs
[0], "nETBIOSName", NULL
);
670 el
= ldb_msg_find_element(req
->op
.mod
.message
, "servicePrincipalName");
672 talloc_free(tmp_ctx
);
673 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
674 "Error finding element for servicePrincipalName.");
677 /* NTDSDSA objectGuid of object we are checking SPN for */
678 if (userAccountControl
& (UF_SERVER_TRUST_ACCOUNT
| UF_PARTIAL_SECRETS_ACCOUNT
)) {
679 ret
= dsdb_module_find_ntdsguid_for_computer(module
, tmp_ctx
,
680 req
->op
.mod
.message
->dn
, &ntds
, req
);
681 if (ret
!= LDB_SUCCESS
) {
682 ldb_asprintf_errstring(ldb
, "Failed to find NTDSDSA objectGuid for %s: %s",
683 ldb_dn_get_linearized(req
->op
.mod
.message
->dn
),
685 talloc_free(tmp_ctx
);
686 return LDB_ERR_OPERATIONS_ERROR
;
688 ntds_guid
= GUID_string(tmp_ctx
, &ntds
);
691 for (i
=0; i
< el
->num_values
; i
++) {
692 ret
= acl_validate_spn_value(tmp_ctx
,
694 (char *)el
->values
[i
].data
,
700 if (ret
!= LDB_SUCCESS
) {
701 talloc_free(tmp_ctx
);
705 talloc_free(tmp_ctx
);
709 static int acl_add(struct ldb_module
*module
, struct ldb_request
*req
)
712 struct ldb_dn
*parent
= ldb_dn_get_parent(req
, req
->op
.add
.message
->dn
);
713 struct ldb_context
*ldb
;
714 const struct dsdb_schema
*schema
;
715 struct ldb_message_element
*oc_el
;
716 const struct GUID
*guid
;
717 struct ldb_dn
*nc_root
;
718 struct ldb_control
*as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
720 if (as_system
!= NULL
) {
721 as_system
->critical
= 0;
724 if (dsdb_module_am_system(module
) || as_system
) {
725 return ldb_next_request(module
, req
);
727 if (ldb_dn_is_special(req
->op
.add
.message
->dn
)) {
728 return ldb_next_request(module
, req
);
731 ldb
= ldb_module_get_ctx(module
);
733 /* Creating an NC. There is probably something we should do here,
734 * but we will establish that later */
736 ret
= dsdb_find_nc_root(ldb
, req
, req
->op
.add
.message
->dn
, &nc_root
);
737 if (ret
!= LDB_SUCCESS
) {
740 if (ldb_dn_compare(nc_root
, req
->op
.add
.message
->dn
) == 0) {
741 talloc_free(nc_root
);
742 return ldb_next_request(module
, req
);
744 talloc_free(nc_root
);
746 schema
= dsdb_get_schema(ldb
, req
);
748 return ldb_operr(ldb
);
751 oc_el
= ldb_msg_find_element(req
->op
.add
.message
, "objectClass");
752 if (!oc_el
|| oc_el
->num_values
== 0) {
753 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
754 "acl: unable to find objectClass on %s\n",
755 ldb_dn_get_linearized(req
->op
.add
.message
->dn
));
756 return ldb_module_done(req
, NULL
, NULL
, LDB_ERR_OPERATIONS_ERROR
);
759 guid
= class_schemaid_guid_by_lDAPDisplayName(schema
,
760 (char *)oc_el
->values
[oc_el
->num_values
-1].data
);
761 ret
= dsdb_module_check_access_on_dn(module
, req
, parent
, SEC_ADS_CREATE_CHILD
, guid
, req
);
762 if (ret
!= LDB_SUCCESS
) {
765 return ldb_next_request(module
, req
);
768 /* ckecks if modifications are allowed on "Member" attribute */
769 static int acl_check_self_membership(TALLOC_CTX
*mem_ctx
,
770 struct ldb_module
*module
,
771 struct ldb_request
*req
,
772 struct security_descriptor
*sd
,
774 const struct GUID
*oc_guid
,
775 const struct dsdb_attribute
*attr
)
779 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
780 struct ldb_dn
*user_dn
;
781 struct ldb_message_element
*member_el
;
782 /* if we have wp, we can do whatever we like */
783 if (acl_check_access_on_attribute(module
,
788 attr
) == LDB_SUCCESS
) {
791 /* if we are adding/deleting ourselves, check for self membership */
792 ret
= dsdb_find_dn_by_sid(ldb
, mem_ctx
,
793 &acl_user_token(module
)->sids
[PRIMARY_USER_SID_INDEX
],
795 if (ret
!= LDB_SUCCESS
) {
798 member_el
= ldb_msg_find_element(req
->op
.mod
.message
, "member");
800 return ldb_operr(ldb
);
802 /* user can only remove oneself */
803 if (member_el
->num_values
== 0) {
804 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
806 for (i
= 0; i
< member_el
->num_values
; i
++) {
807 if (strcasecmp((const char *)member_el
->values
[i
].data
,
808 ldb_dn_get_extended_linearized(mem_ctx
, user_dn
, 1)) != 0) {
809 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
812 ret
= acl_check_extended_right(mem_ctx
, sd
, acl_user_token(module
),
813 GUID_DRS_SELF_MEMBERSHIP
,
816 if (ret
== LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
) {
817 dsdb_acl_debug(sd
, acl_user_token(module
),
818 req
->op
.mod
.message
->dn
,
825 static int acl_check_password_rights(TALLOC_CTX
*mem_ctx
,
826 struct ldb_module
*module
,
827 struct ldb_request
*req
,
828 struct security_descriptor
*sd
,
830 const struct GUID
*oc_guid
,
833 int ret
= LDB_SUCCESS
;
834 unsigned int del_attr_cnt
= 0, add_attr_cnt
= 0, rep_attr_cnt
= 0;
835 struct ldb_message_element
*el
;
836 struct ldb_message
*msg
;
837 const char *passwordAttrs
[] = { "userPassword", "clearTextPassword",
838 "unicodePwd", "dBCSPwd", NULL
}, **l
;
839 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
841 msg
= ldb_msg_copy_shallow(tmp_ctx
, req
->op
.mod
.message
);
843 return ldb_module_oom(module
);
845 for (l
= passwordAttrs
; *l
!= NULL
; l
++) {
846 if ((!userPassword
) && (ldb_attr_cmp(*l
, "userPassword") == 0)) {
850 while ((el
= ldb_msg_find_element(msg
, *l
)) != NULL
) {
851 if (LDB_FLAG_MOD_TYPE(el
->flags
) == LDB_FLAG_MOD_DELETE
) {
854 if (LDB_FLAG_MOD_TYPE(el
->flags
) == LDB_FLAG_MOD_ADD
) {
857 if (LDB_FLAG_MOD_TYPE(el
->flags
) == LDB_FLAG_MOD_REPLACE
) {
860 ldb_msg_remove_element(msg
, el
);
864 /* single deletes will be handled by the "password_hash" LDB module
865 * later in the stack, so we let it though here */
866 if ((del_attr_cnt
> 0) && (add_attr_cnt
== 0) && (rep_attr_cnt
== 0)) {
867 talloc_free(tmp_ctx
);
871 if (ldb_request_get_control(req
,
872 DSDB_CONTROL_PASSWORD_CHANGE_OID
) != NULL
) {
873 /* The "DSDB_CONTROL_PASSWORD_CHANGE_OID" control means that we
874 * have a user password change and not a set as the message
875 * looks like. In it's value blob it contains the NT and/or LM
876 * hash of the old password specified by the user.
877 * This control is used by the SAMR and "kpasswd" password
878 * change mechanisms. */
879 ret
= acl_check_extended_right(tmp_ctx
, sd
, acl_user_token(module
),
880 GUID_DRS_USER_CHANGE_PASSWORD
,
881 SEC_ADS_CONTROL_ACCESS
,
884 else if (rep_attr_cnt
> 0 || (add_attr_cnt
!= del_attr_cnt
)) {
885 ret
= acl_check_extended_right(tmp_ctx
, sd
, acl_user_token(module
),
886 GUID_DRS_FORCE_CHANGE_PASSWORD
,
887 SEC_ADS_CONTROL_ACCESS
,
890 else if (add_attr_cnt
== 1 && del_attr_cnt
== 1) {
891 ret
= acl_check_extended_right(tmp_ctx
, sd
, acl_user_token(module
),
892 GUID_DRS_USER_CHANGE_PASSWORD
,
893 SEC_ADS_CONTROL_ACCESS
,
895 /* Very strange, but we get constraint violation in this case */
896 if (ret
== LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
) {
897 ret
= LDB_ERR_CONSTRAINT_VIOLATION
;
900 if (ret
!= LDB_SUCCESS
) {
901 dsdb_acl_debug(sd
, acl_user_token(module
),
902 req
->op
.mod
.message
->dn
,
906 talloc_free(tmp_ctx
);
910 static const struct GUID
*get_oc_guid_from_message(const struct dsdb_schema
*schema
,
911 struct ldb_message
*msg
)
913 struct ldb_message_element
*oc_el
;
914 const struct dsdb_class
*object_class
;
916 oc_el
= ldb_msg_find_element(msg
, "objectClass");
921 object_class
= dsdb_get_last_structural_class(schema
, oc_el
);
922 if (object_class
== NULL
) {
926 return &object_class
->schemaIDGUID
;
930 static int acl_modify(struct ldb_module
*module
, struct ldb_request
*req
)
933 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
934 const struct dsdb_schema
*schema
;
936 const struct GUID
*guid
;
937 uint32_t access_granted
;
938 struct object_tree
*root
= NULL
;
939 struct object_tree
*new_node
= NULL
;
941 struct ldb_result
*acl_res
;
942 struct security_descriptor
*sd
;
943 struct dom_sid
*sid
= NULL
;
944 struct ldb_control
*as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
945 bool userPassword
= dsdb_user_password_support(module
, req
, req
);
946 TALLOC_CTX
*tmp_ctx
= talloc_new(req
);
947 static const char *acl_attrs
[] = {
948 "nTSecurityDescriptor",
954 if (as_system
!= NULL
) {
955 as_system
->critical
= 0;
958 /* Don't print this debug statement if elements[0].name is going to be NULL */
959 if(req
->op
.mod
.message
->num_elements
> 0)
961 DEBUG(10, ("ldb:acl_modify: %s\n", req
->op
.mod
.message
->elements
[0].name
));
963 if (dsdb_module_am_system(module
) || as_system
) {
964 return ldb_next_request(module
, req
);
966 if (ldb_dn_is_special(req
->op
.mod
.message
->dn
)) {
967 return ldb_next_request(module
, req
);
969 ret
= dsdb_module_search_dn(module
, tmp_ctx
, &acl_res
, req
->op
.mod
.message
->dn
,
971 DSDB_FLAG_NEXT_MODULE
| DSDB_SEARCH_SHOW_DELETED
,
974 if (ret
!= LDB_SUCCESS
) {
978 schema
= dsdb_get_schema(ldb
, tmp_ctx
);
980 ret
= LDB_ERR_OPERATIONS_ERROR
;
984 ret
= dsdb_get_sd_from_ldb_message(ldb
, tmp_ctx
, acl_res
->msgs
[0], &sd
);
985 if (ret
!= LDB_SUCCESS
) {
986 talloc_free(tmp_ctx
);
987 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
988 "acl_modify: Error retrieving security descriptor.");
990 /* Theoretically we pass the check if the object has no sd */
995 guid
= get_oc_guid_from_message(schema
, acl_res
->msgs
[0]);
997 talloc_free(tmp_ctx
);
998 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
999 "acl_modify: Error retrieving object class GUID.");
1001 sid
= samdb_result_dom_sid(req
, acl_res
->msgs
[0], "objectSid");
1002 if (!insert_in_object_tree(tmp_ctx
, guid
, SEC_ADS_WRITE_PROP
,
1003 &root
, &new_node
)) {
1004 talloc_free(tmp_ctx
);
1005 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
1006 "acl_modify: Error adding new node in object tree.");
1008 for (i
=0; i
< req
->op
.mod
.message
->num_elements
; i
++){
1009 const struct dsdb_attribute
*attr
;
1010 attr
= dsdb_attribute_by_lDAPDisplayName(schema
,
1011 req
->op
.mod
.message
->elements
[i
].name
);
1013 if (ldb_attr_cmp("nTSecurityDescriptor", req
->op
.mod
.message
->elements
[i
].name
) == 0) {
1014 status
= sec_access_check_ds(sd
, acl_user_token(module
),
1020 if (!NT_STATUS_IS_OK(status
)) {
1021 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1022 "Object %s has no write dacl access\n",
1023 ldb_dn_get_linearized(req
->op
.mod
.message
->dn
));
1025 acl_user_token(module
),
1026 req
->op
.mod
.message
->dn
,
1029 ret
= LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1033 else if (ldb_attr_cmp("member", req
->op
.mod
.message
->elements
[i
].name
) == 0) {
1034 ret
= acl_check_self_membership(tmp_ctx
,
1041 if (ret
!= LDB_SUCCESS
) {
1045 else if (ldb_attr_cmp("dBCSPwd", req
->op
.mod
.message
->elements
[i
].name
) == 0) {
1046 /* this one is not affected by any rights, we should let it through
1047 so that passwords_hash returns the correct error */
1050 else if (ldb_attr_cmp("unicodePwd", req
->op
.mod
.message
->elements
[i
].name
) == 0 ||
1051 (userPassword
&& ldb_attr_cmp("userPassword", req
->op
.mod
.message
->elements
[i
].name
) == 0) ||
1052 ldb_attr_cmp("clearTextPassword", req
->op
.mod
.message
->elements
[i
].name
) == 0) {
1053 ret
= acl_check_password_rights(tmp_ctx
,
1060 if (ret
!= LDB_SUCCESS
) {
1063 } else if (ldb_attr_cmp("servicePrincipalName", req
->op
.mod
.message
->elements
[i
].name
) == 0) {
1064 ret
= acl_check_spn(tmp_ctx
,
1071 if (ret
!= LDB_SUCCESS
) {
1076 /* This basic attribute existence check with the right errorcode
1077 * is needed since this module is the first one which requests
1078 * schema attribute information.
1079 * The complete attribute checking is done in the
1080 * "objectclass_attrs" module behind this one.
1083 ldb_asprintf_errstring(ldb
, "acl_modify: attribute '%s' on entry '%s' was not found in the schema!",
1084 req
->op
.mod
.message
->elements
[i
].name
,
1085 ldb_dn_get_linearized(req
->op
.mod
.message
->dn
));
1086 ret
= LDB_ERR_NO_SUCH_ATTRIBUTE
;
1089 if (!insert_in_object_tree(tmp_ctx
,
1090 &attr
->attributeSecurityGUID
, SEC_ADS_WRITE_PROP
,
1091 &new_node
, &new_node
)) {
1092 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1093 "acl_modify: cannot add to object tree securityGUID\n");
1094 ret
= LDB_ERR_OPERATIONS_ERROR
;
1098 if (!insert_in_object_tree(tmp_ctx
,
1099 &attr
->schemaIDGUID
, SEC_ADS_WRITE_PROP
, &new_node
, &new_node
)) {
1100 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1101 "acl_modify: cannot add to object tree attributeGUID\n");
1102 ret
= LDB_ERR_OPERATIONS_ERROR
;
1108 if (root
->num_of_children
> 0) {
1109 status
= sec_access_check_ds(sd
, acl_user_token(module
),
1115 if (!NT_STATUS_IS_OK(status
)) {
1116 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1117 "Object %s has no write property access\n",
1118 ldb_dn_get_linearized(req
->op
.mod
.message
->dn
));
1120 acl_user_token(module
),
1121 req
->op
.mod
.message
->dn
,
1124 ret
= LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1130 talloc_free(tmp_ctx
);
1131 return ldb_next_request(module
, req
);
1133 talloc_free(tmp_ctx
);
1137 /* similar to the modify for the time being.
1138 * We need to consider the special delete tree case, though - TODO */
1139 static int acl_delete(struct ldb_module
*module
, struct ldb_request
*req
)
1142 struct ldb_dn
*parent
= ldb_dn_get_parent(req
, req
->op
.del
.dn
);
1143 struct ldb_context
*ldb
;
1144 struct ldb_dn
*nc_root
;
1145 struct ldb_control
*as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
1147 if (as_system
!= NULL
) {
1148 as_system
->critical
= 0;
1151 DEBUG(10, ("ldb:acl_delete: %s\n", ldb_dn_get_linearized(req
->op
.del
.dn
)));
1152 if (dsdb_module_am_system(module
) || as_system
) {
1153 return ldb_next_request(module
, req
);
1155 if (ldb_dn_is_special(req
->op
.del
.dn
)) {
1156 return ldb_next_request(module
, req
);
1159 ldb
= ldb_module_get_ctx(module
);
1161 /* Make sure we aren't deleting a NC */
1163 ret
= dsdb_find_nc_root(ldb
, req
, req
->op
.del
.dn
, &nc_root
);
1164 if (ret
!= LDB_SUCCESS
) {
1167 if (ldb_dn_compare(nc_root
, req
->op
.del
.dn
) == 0) {
1168 talloc_free(nc_root
);
1169 DEBUG(10,("acl:deleting a NC\n"));
1170 /* Windows returns "ERR_UNWILLING_TO_PERFORM */
1171 return ldb_module_done(req
, NULL
, NULL
,
1172 LDB_ERR_UNWILLING_TO_PERFORM
);
1174 talloc_free(nc_root
);
1176 /* First check if we have delete object right */
1177 ret
= dsdb_module_check_access_on_dn(module
, req
, req
->op
.del
.dn
,
1178 SEC_STD_DELETE
, NULL
, req
);
1179 if (ret
== LDB_SUCCESS
) {
1180 return ldb_next_request(module
, req
);
1183 /* Nope, we don't have delete object. Lets check if we have delete
1184 * child on the parent */
1185 ret
= dsdb_module_check_access_on_dn(module
, req
, parent
,
1186 SEC_ADS_DELETE_CHILD
, NULL
, req
);
1187 if (ret
!= LDB_SUCCESS
) {
1191 return ldb_next_request(module
, req
);
1194 static int acl_rename(struct ldb_module
*module
, struct ldb_request
*req
)
1197 struct ldb_dn
*oldparent
= ldb_dn_get_parent(req
, req
->op
.rename
.olddn
);
1198 struct ldb_dn
*newparent
= ldb_dn_get_parent(req
, req
->op
.rename
.newdn
);
1199 const struct dsdb_schema
*schema
;
1200 struct ldb_context
*ldb
;
1201 struct security_descriptor
*sd
= NULL
;
1202 struct dom_sid
*sid
= NULL
;
1203 struct ldb_result
*acl_res
;
1204 const struct GUID
*guid
;
1205 struct ldb_dn
*nc_root
;
1206 struct object_tree
*root
= NULL
;
1207 struct object_tree
*new_node
= NULL
;
1208 struct ldb_control
*as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
1209 TALLOC_CTX
*tmp_ctx
= talloc_new(req
);
1211 uint32_t access_granted
;
1212 const char *rdn_name
;
1213 static const char *acl_attrs
[] = {
1214 "nTSecurityDescriptor",
1220 if (as_system
!= NULL
) {
1221 as_system
->critical
= 0;
1224 DEBUG(10, ("ldb:acl_rename: %s\n", ldb_dn_get_linearized(req
->op
.rename
.olddn
)));
1225 if (dsdb_module_am_system(module
) || as_system
) {
1226 return ldb_next_request(module
, req
);
1228 if (ldb_dn_is_special(req
->op
.rename
.olddn
)) {
1229 return ldb_next_request(module
, req
);
1232 ldb
= ldb_module_get_ctx(module
);
1234 /* Make sure we aren't renaming/moving a NC */
1236 ret
= dsdb_find_nc_root(ldb
, req
, req
->op
.rename
.olddn
, &nc_root
);
1237 if (ret
!= LDB_SUCCESS
) {
1240 if (ldb_dn_compare(nc_root
, req
->op
.rename
.olddn
) == 0) {
1241 talloc_free(nc_root
);
1242 DEBUG(10,("acl:renaming/moving a NC\n"));
1243 /* Windows returns "ERR_UNWILLING_TO_PERFORM */
1244 return ldb_module_done(req
, NULL
, NULL
,
1245 LDB_ERR_UNWILLING_TO_PERFORM
);
1247 talloc_free(nc_root
);
1249 /* Look for the parent */
1251 ret
= dsdb_module_search_dn(module
, tmp_ctx
, &acl_res
,
1252 req
->op
.rename
.olddn
, acl_attrs
,
1253 DSDB_FLAG_NEXT_MODULE
|
1254 DSDB_SEARCH_SHOW_RECYCLED
, req
);
1255 /* we sould be able to find the parent */
1256 if (ret
!= LDB_SUCCESS
) {
1257 DEBUG(10,("acl: failed to find object %s\n",
1258 ldb_dn_get_linearized(req
->op
.rename
.olddn
)));
1259 talloc_free(tmp_ctx
);
1263 schema
= dsdb_get_schema(ldb
, acl_res
);
1265 talloc_free(tmp_ctx
);
1266 return ldb_operr(ldb
);
1269 guid
= get_oc_guid_from_message(schema
, acl_res
->msgs
[0]);
1270 if (!insert_in_object_tree(tmp_ctx
, guid
, SEC_ADS_WRITE_PROP
,
1271 &root
, &new_node
)) {
1272 talloc_free(tmp_ctx
);
1273 return ldb_operr(ldb
);
1276 guid
= attribute_schemaid_guid_by_lDAPDisplayName(schema
,
1278 if (!insert_in_object_tree(tmp_ctx
, guid
, SEC_ADS_WRITE_PROP
,
1279 &new_node
, &new_node
)) {
1280 talloc_free(tmp_ctx
);
1281 return ldb_operr(ldb
);
1284 rdn_name
= ldb_dn_get_rdn_name(req
->op
.rename
.olddn
);
1285 if (rdn_name
== NULL
) {
1286 talloc_free(tmp_ctx
);
1287 return ldb_operr(ldb
);
1289 guid
= attribute_schemaid_guid_by_lDAPDisplayName(schema
,
1291 if (!insert_in_object_tree(tmp_ctx
, guid
, SEC_ADS_WRITE_PROP
,
1292 &new_node
, &new_node
)) {
1293 talloc_free(tmp_ctx
);
1294 return ldb_operr(ldb
);
1297 ret
= dsdb_get_sd_from_ldb_message(ldb
, req
, acl_res
->msgs
[0], &sd
);
1299 if (ret
!= LDB_SUCCESS
) {
1300 talloc_free(tmp_ctx
);
1301 return ldb_operr(ldb
);
1303 /* Theoretically we pass the check if the object has no sd */
1305 talloc_free(tmp_ctx
);
1308 sid
= samdb_result_dom_sid(req
, acl_res
->msgs
[0], "objectSid");
1309 status
= sec_access_check_ds(sd
, acl_user_token(module
),
1315 if (!NT_STATUS_IS_OK(status
)) {
1316 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1317 "Object %s has no wp on name\n",
1318 ldb_dn_get_linearized(req
->op
.rename
.olddn
));
1320 acl_user_token(module
),
1321 req
->op
.rename
.olddn
,
1324 talloc_free(tmp_ctx
);
1325 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1328 if (ldb_dn_compare(oldparent
, newparent
) == 0) {
1329 /* regular rename, not move, nothing more to do */
1330 talloc_free(tmp_ctx
);
1331 return ldb_next_request(module
, req
);
1334 /* new parent should have create child */
1337 guid
= get_oc_guid_from_message(schema
, acl_res
->msgs
[0]);
1339 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1340 "acl:renamed object has no object class\n");
1341 talloc_free(tmp_ctx
);
1342 return ldb_module_done(req
, NULL
, NULL
, LDB_ERR_OPERATIONS_ERROR
);
1345 ret
= dsdb_module_check_access_on_dn(module
, req
, newparent
, SEC_ADS_CREATE_CHILD
, guid
, req
);
1346 if (ret
!= LDB_SUCCESS
) {
1347 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1348 "acl:access_denied renaming %s",
1349 ldb_dn_get_linearized(req
->op
.rename
.olddn
));
1350 talloc_free(tmp_ctx
);
1353 /* do we have delete object on the object? */
1355 status
= sec_access_check_ds(sd
, acl_user_token(module
),
1361 if (NT_STATUS_IS_OK(status
)) {
1362 talloc_free(tmp_ctx
);
1363 return ldb_next_request(module
, req
);
1365 /* what about delete child on the current parent */
1366 ret
= dsdb_module_check_access_on_dn(module
, req
, oldparent
, SEC_ADS_DELETE_CHILD
, NULL
, req
);
1367 if (ret
!= LDB_SUCCESS
) {
1368 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1369 "acl:access_denied renaming %s", ldb_dn_get_linearized(req
->op
.rename
.olddn
));
1370 talloc_free(tmp_ctx
);
1371 return ldb_module_done(req
, NULL
, NULL
, ret
);
1374 talloc_free(tmp_ctx
);
1376 return ldb_next_request(module
, req
);
1379 static int acl_search_callback(struct ldb_request
*req
, struct ldb_reply
*ares
)
1381 struct acl_context
*ac
;
1382 struct acl_private
*data
;
1383 struct ldb_result
*acl_res
;
1384 static const char *acl_attrs
[] = {
1386 "nTSecurityDescriptor",
1393 ac
= talloc_get_type(req
->context
, struct acl_context
);
1394 data
= talloc_get_type(ldb_module_get_private(ac
->module
), struct acl_private
);
1396 return ldb_module_done(ac
->req
, NULL
, NULL
,
1397 LDB_ERR_OPERATIONS_ERROR
);
1399 if (ares
->error
!= LDB_SUCCESS
) {
1400 return ldb_module_done(ac
->req
, ares
->controls
,
1401 ares
->response
, ares
->error
);
1404 switch (ares
->type
) {
1405 case LDB_REPLY_ENTRY
:
1406 if (ac
->allowedAttributes
1407 || ac
->allowedChildClasses
1408 || ac
->allowedChildClassesEffective
1409 || ac
->allowedAttributesEffective
1410 || ac
->sDRightsEffective
) {
1411 ret
= dsdb_module_search_dn(ac
->module
, ac
, &acl_res
, ares
->message
->dn
,
1413 DSDB_FLAG_NEXT_MODULE
|
1414 DSDB_SEARCH_SHOW_DELETED
, req
);
1415 if (ret
!= LDB_SUCCESS
) {
1416 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1418 if (ac
->allowedAttributes
|| ac
->allowedAttributesEffective
) {
1419 ret
= acl_allowedAttributes(ac
->module
, ac
->schema
, acl_res
->msgs
[0], ares
->message
, ac
);
1420 if (ret
!= LDB_SUCCESS
) {
1421 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1424 if (ac
->allowedChildClasses
) {
1425 ret
= acl_childClasses(ac
->module
, ac
->schema
, acl_res
->msgs
[0],
1426 ares
->message
, "allowedChildClasses");
1427 if (ret
!= LDB_SUCCESS
) {
1428 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1431 if (ac
->allowedChildClassesEffective
) {
1432 ret
= acl_childClassesEffective(ac
->module
, ac
->schema
,
1433 acl_res
->msgs
[0], ares
->message
, ac
);
1434 if (ret
!= LDB_SUCCESS
) {
1435 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1438 if (ac
->sDRightsEffective
) {
1439 ret
= acl_sDRightsEffective(ac
->module
,
1440 acl_res
->msgs
[0], ares
->message
, ac
);
1441 if (ret
!= LDB_SUCCESS
) {
1442 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1446 if (data
&& data
->password_attrs
) {
1447 if (!ac
->am_system
) {
1448 for (i
= 0; data
->password_attrs
[i
]; i
++) {
1449 if ((!ac
->userPassword
) &&
1450 (ldb_attr_cmp(data
->password_attrs
[i
],
1451 "userPassword") == 0))
1454 ldb_msg_remove_attr(ares
->message
, data
->password_attrs
[i
]);
1458 return ldb_module_send_entry(ac
->req
, ares
->message
, ares
->controls
);
1460 case LDB_REPLY_REFERRAL
:
1461 return ldb_module_send_referral(ac
->req
, ares
->referral
);
1463 case LDB_REPLY_DONE
:
1464 return ldb_module_done(ac
->req
, ares
->controls
,
1465 ares
->response
, LDB_SUCCESS
);
1471 static int acl_search(struct ldb_module
*module
, struct ldb_request
*req
)
1473 struct ldb_context
*ldb
;
1474 struct acl_context
*ac
;
1475 struct ldb_request
*down_req
;
1476 struct acl_private
*data
;
1480 ldb
= ldb_module_get_ctx(module
);
1482 ac
= talloc_zero(req
, struct acl_context
);
1484 return ldb_oom(ldb
);
1486 data
= talloc_get_type(ldb_module_get_private(module
), struct acl_private
);
1488 ac
->module
= module
;
1490 ac
->am_system
= dsdb_module_am_system(module
);
1491 ac
->allowedAttributes
= ldb_attr_in_list(req
->op
.search
.attrs
, "allowedAttributes");
1492 ac
->allowedAttributesEffective
= ldb_attr_in_list(req
->op
.search
.attrs
, "allowedAttributesEffective");
1493 ac
->allowedChildClasses
= ldb_attr_in_list(req
->op
.search
.attrs
, "allowedChildClasses");
1494 ac
->allowedChildClassesEffective
= ldb_attr_in_list(req
->op
.search
.attrs
, "allowedChildClassesEffective");
1495 ac
->sDRightsEffective
= ldb_attr_in_list(req
->op
.search
.attrs
, "sDRightsEffective");
1496 ac
->userPassword
= dsdb_user_password_support(module
, ac
, req
);
1497 ac
->schema
= dsdb_get_schema(ldb
, ac
);
1499 /* replace any attributes in the parse tree that are private,
1500 so we don't allow a search for 'userPassword=penguin',
1501 just as we would not allow that attribute to be returned */
1502 if (!ac
->am_system
) {
1503 /* FIXME: We should copy the tree and keep the original unmodified. */
1504 /* remove password attributes */
1505 if (data
&& data
->password_attrs
) {
1506 for (i
= 0; data
->password_attrs
[i
]; i
++) {
1507 if ((!ac
->userPassword
) &&
1508 (ldb_attr_cmp(data
->password_attrs
[i
],
1509 "userPassword") == 0))
1512 ldb_parse_tree_attr_replace(req
->op
.search
.tree
,
1513 data
->password_attrs
[i
],
1514 "kludgeACLredactedattribute");
1518 ret
= ldb_build_search_req_ex(&down_req
,
1520 req
->op
.search
.base
,
1521 req
->op
.search
.scope
,
1522 req
->op
.search
.tree
,
1523 req
->op
.search
.attrs
,
1525 ac
, acl_search_callback
,
1527 LDB_REQ_SET_LOCATION(down_req
);
1528 if (ret
!= LDB_SUCCESS
) {
1531 /* perform the search */
1532 return ldb_next_request(module
, down_req
);
1535 static int acl_extended(struct ldb_module
*module
, struct ldb_request
*req
)
1537 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
1538 struct ldb_control
*as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
1540 /* allow everybody to read the sequence number */
1541 if (strcmp(req
->op
.extended
.oid
,
1542 LDB_EXTENDED_SEQUENCE_NUMBER
) == 0) {
1543 return ldb_next_request(module
, req
);
1546 if (dsdb_module_am_system(module
) ||
1547 dsdb_module_am_administrator(module
) || as_system
) {
1548 return ldb_next_request(module
, req
);
1550 ldb_asprintf_errstring(ldb
,
1552 "attempted database modify not permitted. "
1553 "User %s is not SYSTEM or an administrator",
1554 acl_user_name(req
, module
));
1555 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1559 static const struct ldb_module_ops ldb_acl_module_ops
= {
1561 .search
= acl_search
,
1563 .modify
= acl_modify
,
1565 .rename
= acl_rename
,
1566 .extended
= acl_extended
,
1567 .init_context
= acl_module_init
1570 int ldb_acl_module_init(const char *version
)
1572 LDB_MODULE_CHECK_VERSION(version
);
1573 return ldb_register_module(&ldb_acl_module_ops
);