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
;
194 const struct dsdb_class
*objectclass
;
196 /* If we don't have a schema yet, we can't do anything... */
197 if (schema
== NULL
) {
198 ldb_asprintf_errstring(ldb
, "cannot add allowedAttributes to %s because no schema is loaded", ldb_dn_get_linearized(msg
->dn
));
199 return LDB_ERR_OPERATIONS_ERROR
;
202 /* Must remove any existing attribute */
203 if (ac
->allowedAttributes
) {
204 ldb_msg_remove_attr(msg
, "allowedAttributes");
207 mem_ctx
= talloc_new(msg
);
212 oc_el
= ldb_msg_find_element(sd_msg
, "objectClass");
213 attr_list
= dsdb_full_attribute_list(mem_ctx
, schema
, oc_el
, DSDB_SCHEMA_ALL
);
215 ldb_asprintf_errstring(ldb
, "acl: Failed to get list of attributes");
216 talloc_free(mem_ctx
);
217 return LDB_ERR_OPERATIONS_ERROR
;
221 * Get the top-most structural object class for the ACL check
223 objectclass
= dsdb_get_last_structural_class(ac
->schema
,
225 if (objectclass
== NULL
) {
226 ldb_asprintf_errstring(ldb
, "acl_read: Failed to find a structural class for %s",
227 ldb_dn_get_linearized(sd_msg
->dn
));
228 talloc_free(mem_ctx
);
229 return LDB_ERR_OPERATIONS_ERROR
;
232 if (ac
->allowedAttributes
) {
233 for (i
=0; attr_list
&& attr_list
[i
]; i
++) {
234 ldb_msg_add_string(msg
, "allowedAttributes", attr_list
[i
]);
237 if (ac
->allowedAttributesEffective
) {
238 struct security_descriptor
*sd
;
239 struct dom_sid
*sid
= NULL
;
240 struct ldb_control
*as_system
= ldb_request_get_control(ac
->req
,
241 LDB_CONTROL_AS_SYSTEM_OID
);
243 if (as_system
!= NULL
) {
244 as_system
->critical
= 0;
247 ldb_msg_remove_attr(msg
, "allowedAttributesEffective");
248 if (ac
->am_system
|| as_system
) {
249 for (i
=0; attr_list
&& attr_list
[i
]; i
++) {
250 ldb_msg_add_string(msg
, "allowedAttributesEffective", attr_list
[i
]);
255 ret
= dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module
), mem_ctx
, sd_msg
, &sd
);
257 if (ret
!= LDB_SUCCESS
) {
261 sid
= samdb_result_dom_sid(mem_ctx
, sd_msg
, "objectSid");
262 for (i
=0; attr_list
&& attr_list
[i
]; i
++) {
263 const struct dsdb_attribute
*attr
= dsdb_attribute_by_lDAPDisplayName(schema
,
266 return ldb_operr(ldb
);
268 /* remove constructed attributes */
269 if (attr
->systemFlags
& DS_FLAG_ATTR_IS_CONSTRUCTED
271 || (attr
->linkID
!= 0 && attr
->linkID
% 2 != 0 )) {
274 ret
= acl_check_access_on_attribute(module
,
281 if (ret
== LDB_SUCCESS
) {
282 ldb_msg_add_string(msg
, "allowedAttributesEffective", attr_list
[i
]);
289 static int acl_childClasses(struct ldb_module
*module
,
290 const struct dsdb_schema
*schema
,
291 struct ldb_message
*sd_msg
,
292 struct ldb_message
*msg
,
293 const char *attrName
)
295 struct ldb_message_element
*oc_el
;
296 struct ldb_message_element
*allowedClasses
;
297 const struct dsdb_class
*sclass
;
301 /* If we don't have a schema yet, we can't do anything... */
302 if (schema
== NULL
) {
303 ldb_asprintf_errstring(ldb_module_get_ctx(module
), "cannot add childClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg
->dn
));
304 return LDB_ERR_OPERATIONS_ERROR
;
307 /* Must remove any existing attribute, or else confusion reins */
308 ldb_msg_remove_attr(msg
, attrName
);
309 ret
= ldb_msg_add_empty(msg
, attrName
, 0, &allowedClasses
);
310 if (ret
!= LDB_SUCCESS
) {
314 oc_el
= ldb_msg_find_element(sd_msg
, "objectClass");
316 for (i
=0; oc_el
&& i
< oc_el
->num_values
; i
++) {
317 sclass
= dsdb_class_by_lDAPDisplayName_ldb_val(schema
, &oc_el
->values
[i
]);
319 /* We don't know this class? what is going on? */
323 for (j
=0; sclass
->possibleInferiors
&& sclass
->possibleInferiors
[j
]; j
++) {
324 ldb_msg_add_string(msg
, attrName
, sclass
->possibleInferiors
[j
]);
327 if (allowedClasses
->num_values
> 1) {
328 TYPESAFE_QSORT(allowedClasses
->values
, allowedClasses
->num_values
, data_blob_cmp
);
329 for (i
=1 ; i
< allowedClasses
->num_values
; i
++) {
330 struct ldb_val
*val1
= &allowedClasses
->values
[i
-1];
331 struct ldb_val
*val2
= &allowedClasses
->values
[i
];
332 if (data_blob_cmp(val1
, val2
) == 0) {
333 memmove(val1
, val2
, (allowedClasses
->num_values
- i
) * sizeof(struct ldb_val
));
334 allowedClasses
->num_values
--;
343 static int acl_childClassesEffective(struct ldb_module
*module
,
344 const struct dsdb_schema
*schema
,
345 struct ldb_message
*sd_msg
,
346 struct ldb_message
*msg
,
347 struct acl_context
*ac
)
349 struct ldb_message_element
*oc_el
;
350 struct ldb_message_element
*allowedClasses
= NULL
;
351 const struct dsdb_class
*sclass
;
352 struct security_descriptor
*sd
;
353 struct ldb_control
*as_system
= ldb_request_get_control(ac
->req
,
354 LDB_CONTROL_AS_SYSTEM_OID
);
355 struct dom_sid
*sid
= NULL
;
359 if (as_system
!= NULL
) {
360 as_system
->critical
= 0;
363 if (ac
->am_system
|| as_system
) {
364 return acl_childClasses(module
, schema
, sd_msg
, msg
, "allowedChildClassesEffective");
367 /* If we don't have a schema yet, we can't do anything... */
368 if (schema
== NULL
) {
369 ldb_asprintf_errstring(ldb_module_get_ctx(module
), "cannot add allowedChildClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg
->dn
));
370 return LDB_ERR_OPERATIONS_ERROR
;
373 /* Must remove any existing attribute, or else confusion reins */
374 ldb_msg_remove_attr(msg
, "allowedChildClassesEffective");
376 oc_el
= ldb_msg_find_element(sd_msg
, "objectClass");
377 ret
= dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module
), msg
, sd_msg
, &sd
);
378 if (ret
!= LDB_SUCCESS
) {
382 sid
= samdb_result_dom_sid(msg
, sd_msg
, "objectSid");
383 for (i
=0; oc_el
&& i
< oc_el
->num_values
; i
++) {
384 sclass
= dsdb_class_by_lDAPDisplayName_ldb_val(schema
, &oc_el
->values
[i
]);
386 /* We don't know this class? what is going on? */
390 for (j
=0; sclass
->possibleInferiors
&& sclass
->possibleInferiors
[j
]; j
++) {
391 const struct dsdb_class
*sc
;
393 sc
= dsdb_class_by_lDAPDisplayName(schema
,
394 sclass
->possibleInferiors
[j
]);
396 /* We don't know this class? what is going on? */
400 ret
= acl_check_access_on_objectclass(module
, ac
,
402 SEC_ADS_CREATE_CHILD
,
404 if (ret
== LDB_SUCCESS
) {
405 ldb_msg_add_string(msg
, "allowedChildClassesEffective",
406 sclass
->possibleInferiors
[j
]);
410 allowedClasses
= ldb_msg_find_element(msg
, "allowedChildClassesEffective");
411 if (!allowedClasses
) {
415 if (allowedClasses
->num_values
> 1) {
416 TYPESAFE_QSORT(allowedClasses
->values
, allowedClasses
->num_values
, data_blob_cmp
);
417 for (i
=1 ; i
< allowedClasses
->num_values
; i
++) {
418 struct ldb_val
*val1
= &allowedClasses
->values
[i
-1];
419 struct ldb_val
*val2
= &allowedClasses
->values
[i
];
420 if (data_blob_cmp(val1
, val2
) == 0) {
421 memmove(val1
, val2
, (allowedClasses
->num_values
- i
) * sizeof( struct ldb_val
));
422 allowedClasses
->num_values
--;
430 static int acl_sDRightsEffective(struct ldb_module
*module
,
431 struct ldb_message
*sd_msg
,
432 struct ldb_message
*msg
,
433 struct acl_context
*ac
)
435 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
436 struct ldb_message_element
*rightsEffective
;
438 struct security_descriptor
*sd
;
439 struct ldb_control
*as_system
= ldb_request_get_control(ac
->req
,
440 LDB_CONTROL_AS_SYSTEM_OID
);
441 struct dom_sid
*sid
= NULL
;
444 if (as_system
!= NULL
) {
445 as_system
->critical
= 0;
448 /* Must remove any existing attribute, or else confusion reins */
449 ldb_msg_remove_attr(msg
, "sDRightsEffective");
450 ret
= ldb_msg_add_empty(msg
, "sDRightsEffective", 0, &rightsEffective
);
451 if (ret
!= LDB_SUCCESS
) {
454 if (ac
->am_system
|| as_system
) {
455 flags
= SECINFO_OWNER
| SECINFO_GROUP
| SECINFO_SACL
| SECINFO_DACL
;
457 const struct dsdb_class
*objectclass
;
458 const struct dsdb_attribute
*attr
;
460 objectclass
= dsdb_get_structural_oc_from_msg(ac
->schema
, sd_msg
);
461 if (objectclass
== NULL
) {
462 return ldb_operr(ldb
);
465 attr
= dsdb_attribute_by_lDAPDisplayName(ac
->schema
,
466 "nTSecurityDescriptor");
468 return ldb_operr(ldb
);
471 /* Get the security descriptor from the message */
472 ret
= dsdb_get_sd_from_ldb_message(ldb
, msg
, sd_msg
, &sd
);
473 if (ret
!= LDB_SUCCESS
) {
476 sid
= samdb_result_dom_sid(msg
, sd_msg
, "objectSid");
477 ret
= acl_check_access_on_attribute(module
,
484 if (ret
== LDB_SUCCESS
) {
485 flags
|= SECINFO_OWNER
| SECINFO_GROUP
;
487 ret
= acl_check_access_on_attribute(module
,
494 if (ret
== LDB_SUCCESS
) {
495 flags
|= SECINFO_DACL
;
497 ret
= acl_check_access_on_attribute(module
,
501 SEC_FLAG_SYSTEM_SECURITY
,
504 if (ret
== LDB_SUCCESS
) {
505 flags
|= SECINFO_SACL
;
508 return samdb_msg_add_uint(ldb_module_get_ctx(module
), msg
, msg
,
509 "sDRightsEffective", flags
);
512 static int acl_validate_spn_value(TALLOC_CTX
*mem_ctx
,
513 struct ldb_context
*ldb
,
514 const char *spn_value
,
515 uint32_t userAccountControl
,
516 const char *samAccountName
,
517 const char *dnsHostName
,
518 const char *netbios_name
,
519 const char *ntds_guid
)
522 krb5_context krb_ctx
;
523 krb5_error_code kerr
;
524 krb5_principal principal
;
528 const char *forest_name
= samdb_forest_name(ldb
, mem_ctx
);
529 const char *base_domain
= samdb_default_domain_name(ldb
, mem_ctx
);
530 struct loadparm_context
*lp_ctx
= talloc_get_type(ldb_get_opaque(ldb
, "loadparm"),
531 struct loadparm_context
);
532 bool is_dc
= (userAccountControl
& UF_SERVER_TRUST_ACCOUNT
) ||
533 (userAccountControl
& UF_PARTIAL_SECRETS_ACCOUNT
);
535 if (strcasecmp_m(spn_value
, samAccountName
) == 0) {
536 /* MacOS X sets this value, and setting an SPN of your
537 * own samAccountName is both pointless and safe */
541 kerr
= smb_krb5_init_context_basic(mem_ctx
,
545 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
546 "Could not initialize kerberos context.");
549 ret
= krb5_parse_name(krb_ctx
, spn_value
, &principal
);
551 krb5_free_context(krb_ctx
);
552 return LDB_ERR_CONSTRAINT_VIOLATION
;
555 if (krb5_princ_size(krb_ctx
, principal
) < 2) {
559 instanceName
= smb_krb5_principal_get_comp_string(mem_ctx
, krb_ctx
,
561 serviceType
= smb_krb5_principal_get_comp_string(mem_ctx
, krb_ctx
,
563 if (krb5_princ_size(krb_ctx
, principal
) == 3) {
564 serviceName
= smb_krb5_principal_get_comp_string(mem_ctx
, krb_ctx
,
574 if (strcasecmp(serviceType
, "ldap") == 0) {
575 if (strcasecmp(serviceName
, netbios_name
) != 0 &&
576 strcasecmp(serviceName
, forest_name
) != 0) {
580 } else if (strcasecmp(serviceType
, "gc") == 0) {
581 if (strcasecmp(serviceName
, forest_name
) != 0) {
585 if (strcasecmp(serviceName
, base_domain
) != 0 &&
586 strcasecmp(serviceName
, netbios_name
) != 0) {
591 /* instanceName can be samAccountName without $ or dnsHostName
592 * or "ntds_guid._msdcs.forest_domain for DC objects */
593 if (strlen(instanceName
) == (strlen(samAccountName
) - 1)
594 && strncasecmp(instanceName
, samAccountName
, strlen(samAccountName
) - 1) == 0) {
596 } else if (dnsHostName
!= NULL
&& strcasecmp(instanceName
, dnsHostName
) == 0) {
599 const char *guid_str
;
600 guid_str
= talloc_asprintf(mem_ctx
,"%s._msdcs.%s",
603 if (strcasecmp(instanceName
, guid_str
) == 0) {
609 krb5_free_principal(krb_ctx
, principal
);
610 krb5_free_context(krb_ctx
);
611 return LDB_ERR_CONSTRAINT_VIOLATION
;
614 krb5_free_principal(krb_ctx
, principal
);
615 krb5_free_context(krb_ctx
);
619 static int acl_check_spn(TALLOC_CTX
*mem_ctx
,
620 struct ldb_module
*module
,
621 struct ldb_request
*req
,
622 struct security_descriptor
*sd
,
624 const struct dsdb_attribute
*attr
,
625 const struct dsdb_class
*objectclass
)
629 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
630 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
631 struct ldb_result
*acl_res
;
632 struct ldb_result
*netbios_res
;
633 struct ldb_message_element
*el
;
634 struct ldb_dn
*partitions_dn
= samdb_partitions_dn(ldb
, tmp_ctx
);
635 uint32_t userAccountControl
;
636 const char *samAccountName
;
637 const char *dnsHostName
;
638 const char *netbios_name
;
640 char *ntds_guid
= NULL
;
642 static const char *acl_attrs
[] = {
645 "userAccountControl",
648 static const char *netbios_attrs
[] = {
653 /* if we have wp, we can do whatever we like */
654 if (acl_check_access_on_attribute(module
,
659 attr
, objectclass
) == LDB_SUCCESS
) {
660 talloc_free(tmp_ctx
);
664 ret
= acl_check_extended_right(tmp_ctx
, sd
, acl_user_token(module
),
665 GUID_DRS_VALIDATE_SPN
,
669 if (ret
== LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
) {
670 dsdb_acl_debug(sd
, acl_user_token(module
),
671 req
->op
.mod
.message
->dn
,
674 talloc_free(tmp_ctx
);
678 ret
= dsdb_module_search_dn(module
, tmp_ctx
,
679 &acl_res
, req
->op
.mod
.message
->dn
,
681 DSDB_FLAG_NEXT_MODULE
|
682 DSDB_FLAG_AS_SYSTEM
|
683 DSDB_SEARCH_SHOW_RECYCLED
,
685 if (ret
!= LDB_SUCCESS
) {
686 talloc_free(tmp_ctx
);
690 userAccountControl
= ldb_msg_find_attr_as_uint(acl_res
->msgs
[0], "userAccountControl", 0);
691 dnsHostName
= ldb_msg_find_attr_as_string(acl_res
->msgs
[0], "dnsHostName", NULL
);
692 samAccountName
= ldb_msg_find_attr_as_string(acl_res
->msgs
[0], "samAccountName", NULL
);
694 ret
= dsdb_module_search(module
, tmp_ctx
,
695 &netbios_res
, partitions_dn
,
698 DSDB_FLAG_NEXT_MODULE
|
702 ldb_dn_get_linearized(ldb_get_default_basedn(ldb
)));
704 netbios_name
= ldb_msg_find_attr_as_string(netbios_res
->msgs
[0], "nETBIOSName", NULL
);
706 el
= ldb_msg_find_element(req
->op
.mod
.message
, "servicePrincipalName");
708 talloc_free(tmp_ctx
);
709 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
710 "Error finding element for servicePrincipalName.");
713 /* NTDSDSA objectGuid of object we are checking SPN for */
714 if (userAccountControl
& (UF_SERVER_TRUST_ACCOUNT
| UF_PARTIAL_SECRETS_ACCOUNT
)) {
715 ret
= dsdb_module_find_ntdsguid_for_computer(module
, tmp_ctx
,
716 req
->op
.mod
.message
->dn
, &ntds
, req
);
717 if (ret
!= LDB_SUCCESS
) {
718 ldb_asprintf_errstring(ldb
, "Failed to find NTDSDSA objectGuid for %s: %s",
719 ldb_dn_get_linearized(req
->op
.mod
.message
->dn
),
721 talloc_free(tmp_ctx
);
722 return LDB_ERR_OPERATIONS_ERROR
;
724 ntds_guid
= GUID_string(tmp_ctx
, &ntds
);
727 for (i
=0; i
< el
->num_values
; i
++) {
728 ret
= acl_validate_spn_value(tmp_ctx
,
730 (char *)el
->values
[i
].data
,
736 if (ret
!= LDB_SUCCESS
) {
737 talloc_free(tmp_ctx
);
741 talloc_free(tmp_ctx
);
745 static int acl_add(struct ldb_module
*module
, struct ldb_request
*req
)
748 struct ldb_dn
*parent
;
749 struct ldb_context
*ldb
;
750 const struct dsdb_schema
*schema
;
751 const struct dsdb_class
*objectclass
;
752 struct ldb_control
*as_system
;
753 struct ldb_message_element
*el
;
754 unsigned int instanceType
= 0;
756 if (ldb_dn_is_special(req
->op
.add
.message
->dn
)) {
757 return ldb_next_request(module
, req
);
760 as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
761 if (as_system
!= NULL
) {
762 as_system
->critical
= 0;
765 if (dsdb_module_am_system(module
) || as_system
) {
766 return ldb_next_request(module
, req
);
769 ldb
= ldb_module_get_ctx(module
);
771 parent
= ldb_dn_get_parent(req
, req
->op
.add
.message
->dn
);
772 if (parent
== NULL
) {
776 schema
= dsdb_get_schema(ldb
, req
);
778 return ldb_operr(ldb
);
781 objectclass
= dsdb_get_structural_oc_from_msg(schema
, req
->op
.add
.message
);
783 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
784 "acl: unable to find or validate structural objectClass on %s\n",
785 ldb_dn_get_linearized(req
->op
.add
.message
->dn
));
786 return ldb_module_done(req
, NULL
, NULL
, LDB_ERR_OPERATIONS_ERROR
);
789 el
= ldb_msg_find_element(req
->op
.add
.message
, "instanceType");
790 if ((el
!= NULL
) && (el
->num_values
!= 1)) {
791 ldb_set_errstring(ldb
, "acl: the 'instanceType' attribute is single-valued!");
792 return LDB_ERR_UNWILLING_TO_PERFORM
;
795 instanceType
= ldb_msg_find_attr_as_uint(req
->op
.add
.message
,
797 if (instanceType
& INSTANCE_TYPE_IS_NC_HEAD
) {
798 static const char *no_attrs
[] = { NULL
};
799 struct ldb_result
*partition_res
;
800 struct ldb_dn
*partitions_dn
;
802 partitions_dn
= samdb_partitions_dn(ldb
, req
);
803 if (!partitions_dn
) {
804 ldb_set_errstring(ldb
, "acl: CN=partitions dn could not be generated!");
805 return LDB_ERR_UNWILLING_TO_PERFORM
;
808 ret
= dsdb_module_search(module
, req
, &partition_res
,
809 partitions_dn
, LDB_SCOPE_ONELEVEL
,
811 DSDB_FLAG_NEXT_MODULE
|
812 DSDB_FLAG_AS_SYSTEM
|
813 DSDB_SEARCH_ONE_ONLY
|
814 DSDB_SEARCH_SHOW_RECYCLED
,
816 "(&(nCName=%s)(objectClass=crossRef))",
817 ldb_dn_get_linearized(req
->op
.add
.message
->dn
));
819 if (ret
== LDB_SUCCESS
) {
820 /* Check that we can write to the crossRef object MS-ADTS 3.1.1.5.2.8.2 */
821 ret
= dsdb_module_check_access_on_dn(module
, req
, partition_res
->msgs
[0]->dn
,
823 &objectclass
->schemaIDGUID
, req
);
824 if (ret
!= LDB_SUCCESS
) {
825 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
826 "acl: ACL check failed on crossRef object %s: %s\n",
827 ldb_dn_get_linearized(partition_res
->msgs
[0]->dn
),
833 * TODO: Remaining checks, like if we are
834 * the naming master etc need to be handled
835 * in the instanceType module
837 return ldb_next_request(module
, req
);
840 /* Check that we can create a crossRef object MS-ADTS 3.1.1.5.2.8.2 */
841 ret
= dsdb_module_check_access_on_dn(module
, req
, partitions_dn
,
842 SEC_ADS_CREATE_CHILD
,
843 &objectclass
->schemaIDGUID
, req
);
844 if (ret
== LDB_ERR_NO_SUCH_OBJECT
&&
845 ldb_request_get_control(req
, LDB_CONTROL_RELAX_OID
))
847 /* Allow provision bootstrap */
850 if (ret
!= LDB_SUCCESS
) {
851 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
852 "acl: ACL check failed on CN=Partitions crossRef container %s: %s\n",
853 ldb_dn_get_linearized(partitions_dn
), ldb_errstring(ldb
));
858 * TODO: Remaining checks, like if we are the naming
859 * master and adding the crossRef object need to be
860 * handled in the instanceType module
862 return ldb_next_request(module
, req
);
865 ret
= dsdb_module_check_access_on_dn(module
, req
, parent
,
866 SEC_ADS_CREATE_CHILD
,
867 &objectclass
->schemaIDGUID
, req
);
868 if (ret
!= LDB_SUCCESS
) {
869 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
870 "acl: unable to find or validate structural objectClass on %s\n",
871 ldb_dn_get_linearized(req
->op
.add
.message
->dn
));
874 return ldb_next_request(module
, req
);
877 /* ckecks if modifications are allowed on "Member" attribute */
878 static int acl_check_self_membership(TALLOC_CTX
*mem_ctx
,
879 struct ldb_module
*module
,
880 struct ldb_request
*req
,
881 struct security_descriptor
*sd
,
883 const struct dsdb_attribute
*attr
,
884 const struct dsdb_class
*objectclass
)
888 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
889 struct ldb_dn
*user_dn
;
890 struct ldb_message_element
*member_el
;
891 /* if we have wp, we can do whatever we like */
892 if (acl_check_access_on_attribute(module
,
897 attr
, objectclass
) == LDB_SUCCESS
) {
900 /* if we are adding/deleting ourselves, check for self membership */
901 ret
= dsdb_find_dn_by_sid(ldb
, mem_ctx
,
902 &acl_user_token(module
)->sids
[PRIMARY_USER_SID_INDEX
],
904 if (ret
!= LDB_SUCCESS
) {
907 member_el
= ldb_msg_find_element(req
->op
.mod
.message
, "member");
909 return ldb_operr(ldb
);
911 /* user can only remove oneself */
912 if (member_el
->num_values
== 0) {
913 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
915 for (i
= 0; i
< member_el
->num_values
; i
++) {
916 if (strcasecmp((const char *)member_el
->values
[i
].data
,
917 ldb_dn_get_extended_linearized(mem_ctx
, user_dn
, 1)) != 0) {
918 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
921 ret
= acl_check_extended_right(mem_ctx
, sd
, acl_user_token(module
),
922 GUID_DRS_SELF_MEMBERSHIP
,
925 if (ret
== LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
) {
926 dsdb_acl_debug(sd
, acl_user_token(module
),
927 req
->op
.mod
.message
->dn
,
934 static int acl_check_password_rights(TALLOC_CTX
*mem_ctx
,
935 struct ldb_module
*module
,
936 struct ldb_request
*req
,
937 struct security_descriptor
*sd
,
939 const struct dsdb_class
*objectclass
,
942 int ret
= LDB_SUCCESS
;
943 unsigned int del_attr_cnt
= 0, add_attr_cnt
= 0, rep_attr_cnt
= 0;
944 struct ldb_message_element
*el
;
945 struct ldb_message
*msg
;
946 const char *passwordAttrs
[] = { "userPassword", "clearTextPassword",
947 "unicodePwd", "dBCSPwd", NULL
}, **l
;
948 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
950 msg
= ldb_msg_copy_shallow(tmp_ctx
, req
->op
.mod
.message
);
952 return ldb_module_oom(module
);
954 for (l
= passwordAttrs
; *l
!= NULL
; l
++) {
955 if ((!userPassword
) && (ldb_attr_cmp(*l
, "userPassword") == 0)) {
959 while ((el
= ldb_msg_find_element(msg
, *l
)) != NULL
) {
960 if (LDB_FLAG_MOD_TYPE(el
->flags
) == LDB_FLAG_MOD_DELETE
) {
963 if (LDB_FLAG_MOD_TYPE(el
->flags
) == LDB_FLAG_MOD_ADD
) {
966 if (LDB_FLAG_MOD_TYPE(el
->flags
) == LDB_FLAG_MOD_REPLACE
) {
969 ldb_msg_remove_element(msg
, el
);
973 /* single deletes will be handled by the "password_hash" LDB module
974 * later in the stack, so we let it though here */
975 if ((del_attr_cnt
> 0) && (add_attr_cnt
== 0) && (rep_attr_cnt
== 0)) {
976 talloc_free(tmp_ctx
);
980 if (ldb_request_get_control(req
,
981 DSDB_CONTROL_PASSWORD_CHANGE_OID
) != NULL
) {
982 /* The "DSDB_CONTROL_PASSWORD_CHANGE_OID" control means that we
983 * have a user password change and not a set as the message
984 * looks like. In it's value blob it contains the NT and/or LM
985 * hash of the old password specified by the user.
986 * This control is used by the SAMR and "kpasswd" password
987 * change mechanisms. */
988 ret
= acl_check_extended_right(tmp_ctx
, sd
, acl_user_token(module
),
989 GUID_DRS_USER_CHANGE_PASSWORD
,
990 SEC_ADS_CONTROL_ACCESS
,
993 else if (rep_attr_cnt
> 0 || (add_attr_cnt
!= del_attr_cnt
)) {
994 ret
= acl_check_extended_right(tmp_ctx
, sd
, acl_user_token(module
),
995 GUID_DRS_FORCE_CHANGE_PASSWORD
,
996 SEC_ADS_CONTROL_ACCESS
,
999 else if (add_attr_cnt
== 1 && del_attr_cnt
== 1) {
1000 ret
= acl_check_extended_right(tmp_ctx
, sd
, acl_user_token(module
),
1001 GUID_DRS_USER_CHANGE_PASSWORD
,
1002 SEC_ADS_CONTROL_ACCESS
,
1004 /* Very strange, but we get constraint violation in this case */
1005 if (ret
== LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
) {
1006 ret
= LDB_ERR_CONSTRAINT_VIOLATION
;
1009 if (ret
!= LDB_SUCCESS
) {
1010 dsdb_acl_debug(sd
, acl_user_token(module
),
1011 req
->op
.mod
.message
->dn
,
1015 talloc_free(tmp_ctx
);
1020 static int acl_modify(struct ldb_module
*module
, struct ldb_request
*req
)
1023 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
1024 const struct dsdb_schema
*schema
;
1026 const struct dsdb_class
*objectclass
;
1027 struct ldb_result
*acl_res
;
1028 struct security_descriptor
*sd
;
1029 struct dom_sid
*sid
= NULL
;
1030 struct ldb_control
*as_system
;
1031 struct ldb_control
*is_undelete
;
1033 TALLOC_CTX
*tmp_ctx
;
1034 const struct ldb_message
*msg
= req
->op
.mod
.message
;
1035 static const char *acl_attrs
[] = {
1036 "nTSecurityDescriptor",
1042 if (ldb_dn_is_special(msg
->dn
)) {
1043 return ldb_next_request(module
, req
);
1046 as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
1047 if (as_system
!= NULL
) {
1048 as_system
->critical
= 0;
1051 is_undelete
= ldb_request_get_control(req
, DSDB_CONTROL_RESTORE_TOMBSTONE_OID
);
1053 /* Don't print this debug statement if elements[0].name is going to be NULL */
1054 if (msg
->num_elements
> 0) {
1055 DEBUG(10, ("ldb:acl_modify: %s\n", msg
->elements
[0].name
));
1057 if (dsdb_module_am_system(module
) || as_system
) {
1058 return ldb_next_request(module
, req
);
1061 tmp_ctx
= talloc_new(req
);
1062 if (tmp_ctx
== NULL
) {
1063 return ldb_oom(ldb
);
1066 ret
= dsdb_module_search_dn(module
, tmp_ctx
, &acl_res
, msg
->dn
,
1068 DSDB_FLAG_NEXT_MODULE
|
1069 DSDB_FLAG_AS_SYSTEM
|
1070 DSDB_SEARCH_SHOW_RECYCLED
,
1073 if (ret
!= LDB_SUCCESS
) {
1077 userPassword
= dsdb_user_password_support(module
, req
, req
);
1079 schema
= dsdb_get_schema(ldb
, tmp_ctx
);
1081 talloc_free(tmp_ctx
);
1082 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
1083 "acl_modify: Error obtaining schema.");
1086 ret
= dsdb_get_sd_from_ldb_message(ldb
, tmp_ctx
, acl_res
->msgs
[0], &sd
);
1087 if (ret
!= LDB_SUCCESS
) {
1088 talloc_free(tmp_ctx
);
1089 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
1090 "acl_modify: Error retrieving security descriptor.");
1092 /* Theoretically we pass the check if the object has no sd */
1097 objectclass
= dsdb_get_structural_oc_from_msg(schema
, acl_res
->msgs
[0]);
1099 talloc_free(tmp_ctx
);
1100 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
1101 "acl_modify: Error retrieving object class for GUID.");
1103 sid
= samdb_result_dom_sid(req
, acl_res
->msgs
[0], "objectSid");
1104 for (i
=0; i
< msg
->num_elements
; i
++) {
1105 const struct ldb_message_element
*el
= &msg
->elements
[i
];
1106 const struct dsdb_attribute
*attr
;
1109 * This basic attribute existence check with the right errorcode
1110 * is needed since this module is the first one which requests
1111 * schema attribute information.
1112 * The complete attribute checking is done in the
1113 * "objectclass_attrs" module behind this one.
1115 * NOTE: "clearTextPassword" is not defined in the schema.
1117 attr
= dsdb_attribute_by_lDAPDisplayName(schema
, el
->name
);
1118 if (!attr
&& ldb_attr_cmp("clearTextPassword", el
->name
) != 0) {
1119 ldb_asprintf_errstring(ldb
, "acl_modify: attribute '%s' "
1120 "on entry '%s' was not found in the schema!",
1121 req
->op
.mod
.message
->elements
[i
].name
,
1122 ldb_dn_get_linearized(req
->op
.mod
.message
->dn
));
1123 ret
= LDB_ERR_NO_SUCH_ATTRIBUTE
;
1127 if (ldb_attr_cmp("nTSecurityDescriptor", el
->name
) == 0) {
1128 uint32_t sd_flags
= dsdb_request_sd_flags(req
, NULL
);
1129 uint32_t access_mask
= 0;
1131 if (sd_flags
& (SECINFO_OWNER
|SECINFO_GROUP
)) {
1132 access_mask
|= SEC_STD_WRITE_OWNER
;
1134 if (sd_flags
& SECINFO_DACL
) {
1135 access_mask
|= SEC_STD_WRITE_DAC
;
1137 if (sd_flags
& SECINFO_SACL
) {
1138 access_mask
|= SEC_FLAG_SYSTEM_SECURITY
;
1141 ret
= acl_check_access_on_attribute(module
,
1148 if (ret
!= LDB_SUCCESS
) {
1149 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1150 "Object %s has no write dacl access\n",
1151 ldb_dn_get_linearized(msg
->dn
));
1153 acl_user_token(module
),
1157 ret
= LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1160 } else if (ldb_attr_cmp("member", el
->name
) == 0) {
1161 ret
= acl_check_self_membership(tmp_ctx
,
1168 if (ret
!= LDB_SUCCESS
) {
1171 } else if (ldb_attr_cmp("dBCSPwd", el
->name
) == 0) {
1172 /* this one is not affected by any rights, we should let it through
1173 so that passwords_hash returns the correct error */
1175 } else if (ldb_attr_cmp("unicodePwd", el
->name
) == 0 ||
1176 (userPassword
&& ldb_attr_cmp("userPassword", el
->name
) == 0) ||
1177 ldb_attr_cmp("clearTextPassword", el
->name
) == 0) {
1178 ret
= acl_check_password_rights(tmp_ctx
,
1185 if (ret
!= LDB_SUCCESS
) {
1188 } else if (ldb_attr_cmp("servicePrincipalName", el
->name
) == 0) {
1189 ret
= acl_check_spn(tmp_ctx
,
1196 if (ret
!= LDB_SUCCESS
) {
1199 } else if (is_undelete
!= NULL
&& (ldb_attr_cmp("isDeleted", el
->name
) == 0)) {
1201 * in case of undelete op permissions on
1202 * isDeleted are irrelevant and
1203 * distinguishedName is removed by the
1204 * tombstone_reanimate module
1208 ret
= acl_check_access_on_attribute(module
,
1215 if (ret
!= LDB_SUCCESS
) {
1216 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1217 "Object %s has no write property access\n",
1218 ldb_dn_get_linearized(msg
->dn
));
1220 acl_user_token(module
),
1224 ret
= LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1231 talloc_free(tmp_ctx
);
1232 return ldb_next_request(module
, req
);
1234 talloc_free(tmp_ctx
);
1238 /* similar to the modify for the time being.
1239 * We need to consider the special delete tree case, though - TODO */
1240 static int acl_delete(struct ldb_module
*module
, struct ldb_request
*req
)
1243 struct ldb_dn
*parent
;
1244 struct ldb_context
*ldb
;
1245 struct ldb_dn
*nc_root
;
1246 struct ldb_control
*as_system
;
1247 const struct dsdb_schema
*schema
;
1248 const struct dsdb_class
*objectclass
;
1249 struct security_descriptor
*sd
= NULL
;
1250 struct dom_sid
*sid
= NULL
;
1251 struct ldb_result
*acl_res
;
1252 static const char *acl_attrs
[] = {
1253 "nTSecurityDescriptor",
1259 if (ldb_dn_is_special(req
->op
.del
.dn
)) {
1260 return ldb_next_request(module
, req
);
1263 as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
1264 if (as_system
!= NULL
) {
1265 as_system
->critical
= 0;
1268 if (dsdb_module_am_system(module
) || as_system
) {
1269 return ldb_next_request(module
, req
);
1272 DEBUG(10, ("ldb:acl_delete: %s\n", ldb_dn_get_linearized(req
->op
.del
.dn
)));
1274 ldb
= ldb_module_get_ctx(module
);
1276 parent
= ldb_dn_get_parent(req
, req
->op
.del
.dn
);
1277 if (parent
== NULL
) {
1278 return ldb_oom(ldb
);
1281 /* Make sure we aren't deleting a NC */
1283 ret
= dsdb_find_nc_root(ldb
, req
, req
->op
.del
.dn
, &nc_root
);
1284 if (ret
!= LDB_SUCCESS
) {
1287 if (ldb_dn_compare(nc_root
, req
->op
.del
.dn
) == 0) {
1288 talloc_free(nc_root
);
1289 DEBUG(10,("acl:deleting a NC\n"));
1290 /* Windows returns "ERR_UNWILLING_TO_PERFORM */
1291 return ldb_module_done(req
, NULL
, NULL
,
1292 LDB_ERR_UNWILLING_TO_PERFORM
);
1294 talloc_free(nc_root
);
1296 ret
= dsdb_module_search_dn(module
, req
, &acl_res
,
1297 req
->op
.del
.dn
, acl_attrs
,
1298 DSDB_FLAG_NEXT_MODULE
|
1299 DSDB_FLAG_AS_SYSTEM
|
1300 DSDB_SEARCH_SHOW_RECYCLED
, req
);
1301 /* we sould be able to find the parent */
1302 if (ret
!= LDB_SUCCESS
) {
1303 DEBUG(10,("acl: failed to find object %s\n",
1304 ldb_dn_get_linearized(req
->op
.rename
.olddn
)));
1308 ret
= dsdb_get_sd_from_ldb_message(ldb
, req
, acl_res
->msgs
[0], &sd
);
1309 if (ret
!= LDB_SUCCESS
) {
1310 return ldb_operr(ldb
);
1313 return ldb_operr(ldb
);
1316 schema
= dsdb_get_schema(ldb
, req
);
1318 return ldb_operr(ldb
);
1321 sid
= samdb_result_dom_sid(req
, acl_res
->msgs
[0], "objectSid");
1323 objectclass
= dsdb_get_structural_oc_from_msg(schema
, acl_res
->msgs
[0]);
1325 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
1326 "acl_modify: Error retrieving object class for GUID.");
1329 if (ldb_request_get_control(req
, LDB_CONTROL_TREE_DELETE_OID
)) {
1330 ret
= acl_check_access_on_objectclass(module
, req
, sd
, sid
,
1331 SEC_ADS_DELETE_TREE
,
1333 if (ret
!= LDB_SUCCESS
) {
1337 return ldb_next_request(module
, req
);
1340 /* First check if we have delete object right */
1341 ret
= acl_check_access_on_objectclass(module
, req
, sd
, sid
,
1344 if (ret
== LDB_SUCCESS
) {
1345 return ldb_next_request(module
, req
);
1348 /* Nope, we don't have delete object. Lets check if we have delete
1349 * child on the parent */
1350 ret
= dsdb_module_check_access_on_dn(module
, req
, parent
,
1351 SEC_ADS_DELETE_CHILD
,
1352 &objectclass
->schemaIDGUID
,
1354 if (ret
!= LDB_SUCCESS
) {
1358 return ldb_next_request(module
, req
);
1360 static int acl_check_reanimate_tombstone(TALLOC_CTX
*mem_ctx
,
1361 struct ldb_module
*module
,
1362 struct ldb_request
*req
,
1363 struct ldb_dn
*nc_root
)
1366 struct ldb_result
*acl_res
;
1367 struct security_descriptor
*sd
= NULL
;
1368 struct dom_sid
*sid
= NULL
;
1369 static const char *acl_attrs
[] = {
1370 "nTSecurityDescriptor",
1376 ret
= dsdb_module_search_dn(module
, mem_ctx
, &acl_res
,
1378 DSDB_FLAG_NEXT_MODULE
|
1379 DSDB_FLAG_AS_SYSTEM
|
1380 DSDB_SEARCH_SHOW_RECYCLED
, req
);
1381 if (ret
!= LDB_SUCCESS
) {
1382 DEBUG(10,("acl: failed to find object %s\n",
1383 ldb_dn_get_linearized(nc_root
)));
1387 ret
= dsdb_get_sd_from_ldb_message(mem_ctx
, req
, acl_res
->msgs
[0], &sd
);
1388 sid
= samdb_result_dom_sid(mem_ctx
, acl_res
->msgs
[0], "objectSid");
1389 if (ret
!= LDB_SUCCESS
|| !sd
) {
1390 return ldb_operr(ldb_module_get_ctx(module
));
1392 return acl_check_extended_right(mem_ctx
, sd
, acl_user_token(module
),
1393 GUID_DRS_REANIMATE_TOMBSTONE
,
1394 SEC_ADS_CONTROL_ACCESS
, sid
);
1397 static int acl_rename(struct ldb_module
*module
, struct ldb_request
*req
)
1400 struct ldb_dn
*oldparent
;
1401 struct ldb_dn
*newparent
;
1402 const struct dsdb_schema
*schema
;
1403 const struct dsdb_class
*objectclass
;
1404 const struct dsdb_attribute
*attr
= NULL
;
1405 struct ldb_context
*ldb
;
1406 struct security_descriptor
*sd
= NULL
;
1407 struct dom_sid
*sid
= NULL
;
1408 struct ldb_result
*acl_res
;
1409 struct ldb_dn
*nc_root
;
1410 struct ldb_control
*as_system
;
1411 struct ldb_control
*is_undelete
;
1412 TALLOC_CTX
*tmp_ctx
;
1413 const char *rdn_name
;
1414 static const char *acl_attrs
[] = {
1415 "nTSecurityDescriptor",
1421 if (ldb_dn_is_special(req
->op
.rename
.olddn
)) {
1422 return ldb_next_request(module
, req
);
1425 as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
1426 if (as_system
!= NULL
) {
1427 as_system
->critical
= 0;
1430 DEBUG(10, ("ldb:acl_rename: %s\n", ldb_dn_get_linearized(req
->op
.rename
.olddn
)));
1431 if (dsdb_module_am_system(module
) || as_system
) {
1432 return ldb_next_request(module
, req
);
1435 ldb
= ldb_module_get_ctx(module
);
1437 tmp_ctx
= talloc_new(req
);
1438 if (tmp_ctx
== NULL
) {
1439 return ldb_oom(ldb
);
1442 oldparent
= ldb_dn_get_parent(tmp_ctx
, req
->op
.rename
.olddn
);
1443 if (oldparent
== NULL
) {
1444 return ldb_oom(ldb
);
1446 newparent
= ldb_dn_get_parent(tmp_ctx
, req
->op
.rename
.newdn
);
1447 if (newparent
== NULL
) {
1448 return ldb_oom(ldb
);
1451 /* Make sure we aren't renaming/moving a NC */
1453 ret
= dsdb_find_nc_root(ldb
, req
, req
->op
.rename
.olddn
, &nc_root
);
1454 if (ret
!= LDB_SUCCESS
) {
1457 if (ldb_dn_compare(nc_root
, req
->op
.rename
.olddn
) == 0) {
1458 talloc_free(nc_root
);
1459 DEBUG(10,("acl:renaming/moving a NC\n"));
1460 /* Windows returns "ERR_UNWILLING_TO_PERFORM */
1461 return ldb_module_done(req
, NULL
, NULL
,
1462 LDB_ERR_UNWILLING_TO_PERFORM
);
1465 /* special check for undelete operation */
1466 is_undelete
= ldb_request_get_control(req
, DSDB_CONTROL_RESTORE_TOMBSTONE_OID
);
1467 if (is_undelete
!= NULL
) {
1468 is_undelete
->critical
= 0;
1469 ret
= acl_check_reanimate_tombstone(tmp_ctx
, module
, req
, nc_root
);
1470 if (ret
!= LDB_SUCCESS
) {
1471 talloc_free(tmp_ctx
);
1475 talloc_free(nc_root
);
1477 /* Look for the parent */
1479 ret
= dsdb_module_search_dn(module
, tmp_ctx
, &acl_res
,
1480 req
->op
.rename
.olddn
, acl_attrs
,
1481 DSDB_FLAG_NEXT_MODULE
|
1482 DSDB_FLAG_AS_SYSTEM
|
1483 DSDB_SEARCH_SHOW_RECYCLED
, req
);
1484 /* we sould be able to find the parent */
1485 if (ret
!= LDB_SUCCESS
) {
1486 DEBUG(10,("acl: failed to find object %s\n",
1487 ldb_dn_get_linearized(req
->op
.rename
.olddn
)));
1488 talloc_free(tmp_ctx
);
1492 ret
= dsdb_get_sd_from_ldb_message(ldb
, req
, acl_res
->msgs
[0], &sd
);
1493 if (ret
!= LDB_SUCCESS
) {
1494 talloc_free(tmp_ctx
);
1495 return ldb_operr(ldb
);
1498 talloc_free(tmp_ctx
);
1499 return ldb_operr(ldb
);
1502 schema
= dsdb_get_schema(ldb
, acl_res
);
1504 talloc_free(tmp_ctx
);
1505 return ldb_operr(ldb
);
1508 sid
= samdb_result_dom_sid(req
, acl_res
->msgs
[0], "objectSid");
1510 objectclass
= dsdb_get_structural_oc_from_msg(schema
, acl_res
->msgs
[0]);
1512 talloc_free(tmp_ctx
);
1513 return ldb_error(ldb
, LDB_ERR_OPERATIONS_ERROR
,
1514 "acl_modify: Error retrieving object class for GUID.");
1517 attr
= dsdb_attribute_by_lDAPDisplayName(schema
, "name");
1519 talloc_free(tmp_ctx
);
1520 return ldb_operr(ldb
);
1523 ret
= acl_check_access_on_attribute(module
, tmp_ctx
, sd
, sid
,
1526 if (ret
!= LDB_SUCCESS
) {
1527 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1528 "Object %s has no wp on %s\n",
1529 ldb_dn_get_linearized(req
->op
.rename
.olddn
),
1530 attr
->lDAPDisplayName
);
1532 acl_user_token(module
),
1533 req
->op
.rename
.olddn
,
1536 talloc_free(tmp_ctx
);
1537 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1540 rdn_name
= ldb_dn_get_rdn_name(req
->op
.rename
.olddn
);
1541 if (rdn_name
== NULL
) {
1542 talloc_free(tmp_ctx
);
1543 return ldb_operr(ldb
);
1546 attr
= dsdb_attribute_by_lDAPDisplayName(schema
, rdn_name
);
1548 talloc_free(tmp_ctx
);
1549 return ldb_operr(ldb
);
1552 ret
= acl_check_access_on_attribute(module
, tmp_ctx
, sd
, sid
,
1555 if (ret
!= LDB_SUCCESS
) {
1556 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1557 "Object %s has no wp on %s\n",
1558 ldb_dn_get_linearized(req
->op
.rename
.olddn
),
1559 attr
->lDAPDisplayName
);
1561 acl_user_token(module
),
1562 req
->op
.rename
.olddn
,
1565 talloc_free(tmp_ctx
);
1566 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1569 if (ldb_dn_compare(oldparent
, newparent
) == 0) {
1570 /* regular rename, not move, nothing more to do */
1571 talloc_free(tmp_ctx
);
1572 return ldb_next_request(module
, req
);
1575 /* new parent should have create child */
1576 ret
= dsdb_module_check_access_on_dn(module
, req
, newparent
,
1577 SEC_ADS_CREATE_CHILD
,
1578 &objectclass
->schemaIDGUID
, req
);
1579 if (ret
!= LDB_SUCCESS
) {
1580 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1581 "acl:access_denied renaming %s",
1582 ldb_dn_get_linearized(req
->op
.rename
.olddn
));
1583 talloc_free(tmp_ctx
);
1587 /* do we have delete object on the object? */
1588 /* this access is not necessary for undelete ops */
1589 if (is_undelete
== NULL
) {
1590 ret
= acl_check_access_on_objectclass(module
, tmp_ctx
, sd
, sid
,
1593 if (ret
== LDB_SUCCESS
) {
1594 talloc_free(tmp_ctx
);
1595 return ldb_next_request(module
, req
);
1597 /* what about delete child on the current parent */
1598 ret
= dsdb_module_check_access_on_dn(module
, req
, oldparent
,
1599 SEC_ADS_DELETE_CHILD
,
1600 &objectclass
->schemaIDGUID
,
1602 if (ret
!= LDB_SUCCESS
) {
1603 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
1604 "acl:access_denied renaming %s", ldb_dn_get_linearized(req
->op
.rename
.olddn
));
1605 talloc_free(tmp_ctx
);
1606 return ldb_module_done(req
, NULL
, NULL
, ret
);
1609 talloc_free(tmp_ctx
);
1611 return ldb_next_request(module
, req
);
1614 static int acl_search_update_confidential_attrs(struct acl_context
*ac
,
1615 struct acl_private
*data
)
1617 struct dsdb_attribute
*a
;
1620 if (data
->acl_search
) {
1622 * If acl:search is activated, the acl_read module
1623 * protects confidential attributes.
1628 if ((ac
->schema
== data
->cached_schema_ptr
) &&
1629 (ac
->schema
->loaded_usn
== data
->cached_schema_loaded_usn
) &&
1630 (ac
->schema
->metadata_usn
== data
->cached_schema_metadata_usn
))
1635 data
->cached_schema_ptr
= NULL
;
1636 data
->cached_schema_loaded_usn
= 0;
1637 data
->cached_schema_metadata_usn
= 0;
1638 TALLOC_FREE(data
->confidential_attrs
);
1640 if (ac
->schema
== NULL
) {
1644 for (a
= ac
->schema
->attributes
; a
; a
= a
->next
) {
1645 const char **attrs
= data
->confidential_attrs
;
1647 if (!(a
->searchFlags
& SEARCH_FLAG_CONFIDENTIAL
)) {
1651 attrs
= talloc_realloc(data
, attrs
, const char *, n
+ 2);
1652 if (attrs
== NULL
) {
1653 TALLOC_FREE(data
->confidential_attrs
);
1654 return ldb_module_oom(ac
->module
);
1657 attrs
[n
] = a
->lDAPDisplayName
;
1661 data
->confidential_attrs
= attrs
;
1664 data
->cached_schema_ptr
= ac
->schema
;
1665 data
->cached_schema_loaded_usn
= ac
->schema
->loaded_usn
;
1666 data
->cached_schema_metadata_usn
= ac
->schema
->metadata_usn
;
1671 static int acl_search_callback(struct ldb_request
*req
, struct ldb_reply
*ares
)
1673 struct acl_context
*ac
;
1674 struct acl_private
*data
;
1675 struct ldb_result
*acl_res
;
1676 static const char *acl_attrs
[] = {
1678 "nTSecurityDescriptor",
1685 ac
= talloc_get_type(req
->context
, struct acl_context
);
1686 data
= talloc_get_type(ldb_module_get_private(ac
->module
), struct acl_private
);
1688 return ldb_module_done(ac
->req
, NULL
, NULL
,
1689 LDB_ERR_OPERATIONS_ERROR
);
1691 if (ares
->error
!= LDB_SUCCESS
) {
1692 return ldb_module_done(ac
->req
, ares
->controls
,
1693 ares
->response
, ares
->error
);
1696 switch (ares
->type
) {
1697 case LDB_REPLY_ENTRY
:
1698 if (ac
->constructed_attrs
) {
1699 ret
= dsdb_module_search_dn(ac
->module
, ac
, &acl_res
, ares
->message
->dn
,
1701 DSDB_FLAG_NEXT_MODULE
|
1702 DSDB_FLAG_AS_SYSTEM
|
1703 DSDB_SEARCH_SHOW_RECYCLED
,
1705 if (ret
!= LDB_SUCCESS
) {
1706 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1710 if (ac
->allowedAttributes
|| ac
->allowedAttributesEffective
) {
1711 ret
= acl_allowedAttributes(ac
->module
, ac
->schema
,
1714 if (ret
!= LDB_SUCCESS
) {
1715 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1719 if (ac
->allowedChildClasses
) {
1720 ret
= acl_childClasses(ac
->module
, ac
->schema
,
1723 "allowedChildClasses");
1724 if (ret
!= LDB_SUCCESS
) {
1725 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1729 if (ac
->allowedChildClassesEffective
) {
1730 ret
= acl_childClassesEffective(ac
->module
, ac
->schema
,
1733 if (ret
!= LDB_SUCCESS
) {
1734 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1738 if (ac
->sDRightsEffective
) {
1739 ret
= acl_sDRightsEffective(ac
->module
,
1742 if (ret
!= LDB_SUCCESS
) {
1743 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
1748 return ldb_module_send_entry(ac
->req
, ares
->message
,
1752 if (ac
->am_system
) {
1753 return ldb_module_send_entry(ac
->req
, ares
->message
,
1757 if (data
->password_attrs
!= NULL
) {
1758 for (i
= 0; data
->password_attrs
[i
]; i
++) {
1759 if ((!ac
->userPassword
) &&
1760 (ldb_attr_cmp(data
->password_attrs
[i
],
1761 "userPassword") == 0))
1766 ldb_msg_remove_attr(ares
->message
, data
->password_attrs
[i
]);
1770 if (ac
->am_administrator
) {
1771 return ldb_module_send_entry(ac
->req
, ares
->message
,
1775 ret
= acl_search_update_confidential_attrs(ac
, data
);
1776 if (ret
!= LDB_SUCCESS
) {
1780 if (data
->confidential_attrs
!= NULL
) {
1781 for (i
= 0; data
->confidential_attrs
[i
]; i
++) {
1782 ldb_msg_remove_attr(ares
->message
,
1783 data
->confidential_attrs
[i
]);
1787 return ldb_module_send_entry(ac
->req
, ares
->message
, ares
->controls
);
1789 case LDB_REPLY_REFERRAL
:
1790 return ldb_module_send_referral(ac
->req
, ares
->referral
);
1792 case LDB_REPLY_DONE
:
1793 return ldb_module_done(ac
->req
, ares
->controls
,
1794 ares
->response
, LDB_SUCCESS
);
1800 static int acl_search(struct ldb_module
*module
, struct ldb_request
*req
)
1802 struct ldb_context
*ldb
;
1803 struct acl_context
*ac
;
1804 struct ldb_parse_tree
*down_tree
;
1805 struct ldb_request
*down_req
;
1806 struct acl_private
*data
;
1810 if (ldb_dn_is_special(req
->op
.search
.base
)) {
1811 return ldb_next_request(module
, req
);
1814 ldb
= ldb_module_get_ctx(module
);
1816 ac
= talloc_zero(req
, struct acl_context
);
1818 return ldb_oom(ldb
);
1820 data
= talloc_get_type(ldb_module_get_private(module
), struct acl_private
);
1822 ac
->module
= module
;
1824 ac
->am_system
= dsdb_module_am_system(module
);
1825 ac
->am_administrator
= dsdb_module_am_administrator(module
);
1826 ac
->constructed_attrs
= false;
1827 ac
->modify_search
= true;
1828 ac
->allowedAttributes
= ldb_attr_in_list(req
->op
.search
.attrs
, "allowedAttributes");
1829 ac
->allowedAttributesEffective
= ldb_attr_in_list(req
->op
.search
.attrs
, "allowedAttributesEffective");
1830 ac
->allowedChildClasses
= ldb_attr_in_list(req
->op
.search
.attrs
, "allowedChildClasses");
1831 ac
->allowedChildClassesEffective
= ldb_attr_in_list(req
->op
.search
.attrs
, "allowedChildClassesEffective");
1832 ac
->sDRightsEffective
= ldb_attr_in_list(req
->op
.search
.attrs
, "sDRightsEffective");
1833 ac
->userPassword
= true;
1834 ac
->schema
= dsdb_get_schema(ldb
, ac
);
1836 ac
->constructed_attrs
|= ac
->allowedAttributes
;
1837 ac
->constructed_attrs
|= ac
->allowedChildClasses
;
1838 ac
->constructed_attrs
|= ac
->allowedChildClassesEffective
;
1839 ac
->constructed_attrs
|= ac
->allowedAttributesEffective
;
1840 ac
->constructed_attrs
|= ac
->sDRightsEffective
;
1843 ac
->modify_search
= false;
1845 if (ac
->am_system
) {
1846 ac
->modify_search
= false;
1849 if (!ac
->constructed_attrs
&& !ac
->modify_search
) {
1851 return ldb_next_request(module
, req
);
1854 if (!ac
->am_system
) {
1855 ac
->userPassword
= dsdb_user_password_support(module
, ac
, req
);
1858 ret
= acl_search_update_confidential_attrs(ac
, data
);
1859 if (ret
!= LDB_SUCCESS
) {
1863 down_tree
= ldb_parse_tree_copy_shallow(ac
, req
->op
.search
.tree
);
1864 if (down_tree
== NULL
) {
1865 return ldb_oom(ldb
);
1868 if (!ac
->am_system
&& data
->password_attrs
) {
1869 for (i
= 0; data
->password_attrs
[i
]; i
++) {
1870 if ((!ac
->userPassword
) &&
1871 (ldb_attr_cmp(data
->password_attrs
[i
],
1872 "userPassword") == 0))
1877 ldb_parse_tree_attr_replace(down_tree
,
1878 data
->password_attrs
[i
],
1879 "kludgeACLredactedattribute");
1883 if (!ac
->am_system
&& !ac
->am_administrator
&& data
->confidential_attrs
) {
1884 for (i
= 0; data
->confidential_attrs
[i
]; i
++) {
1885 ldb_parse_tree_attr_replace(down_tree
,
1886 data
->confidential_attrs
[i
],
1887 "kludgeACLredactedattribute");
1891 ret
= ldb_build_search_req_ex(&down_req
,
1893 req
->op
.search
.base
,
1894 req
->op
.search
.scope
,
1896 req
->op
.search
.attrs
,
1898 ac
, acl_search_callback
,
1900 LDB_REQ_SET_LOCATION(down_req
);
1901 if (ret
!= LDB_SUCCESS
) {
1904 /* perform the search */
1905 return ldb_next_request(module
, down_req
);
1908 static int acl_extended(struct ldb_module
*module
, struct ldb_request
*req
)
1910 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
1911 struct ldb_control
*as_system
= ldb_request_get_control(req
, LDB_CONTROL_AS_SYSTEM_OID
);
1913 /* allow everybody to read the sequence number */
1914 if (strcmp(req
->op
.extended
.oid
,
1915 LDB_EXTENDED_SEQUENCE_NUMBER
) == 0) {
1916 return ldb_next_request(module
, req
);
1919 if (dsdb_module_am_system(module
) ||
1920 dsdb_module_am_administrator(module
) || as_system
) {
1921 return ldb_next_request(module
, req
);
1923 ldb_asprintf_errstring(ldb
,
1925 "attempted database modify not permitted. "
1926 "User %s is not SYSTEM or an administrator",
1927 acl_user_name(req
, module
));
1928 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
1932 static const struct ldb_module_ops ldb_acl_module_ops
= {
1934 .search
= acl_search
,
1936 .modify
= acl_modify
,
1938 .rename
= acl_rename
,
1939 .extended
= acl_extended
,
1940 .init_context
= acl_module_init
1943 int ldb_acl_module_init(const char *version
)
1945 LDB_MODULE_CHECK_VERSION(version
);
1946 return ldb_register_module(&ldb_acl_module_ops
);