4 Copyright (C) Nadezhda Ivanova 2010
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 * Component: ldb ACL modules
25 * Description: Some auxiliary functions used for access checking
27 * Author: Nadezhda Ivanova
30 #include "ldb_module.h"
31 #include "auth/auth.h"
32 #include "libcli/security/security.h"
33 #include "dsdb/samdb/samdb.h"
34 #include "librpc/gen_ndr/ndr_security.h"
35 #include "param/param.h"
36 #include "dsdb/samdb/ldb_modules/util.h"
38 struct security_token
*acl_user_token(struct ldb_module
*module
)
40 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
41 struct auth_session_info
*session_info
42 = (struct auth_session_info
*)ldb_get_opaque(ldb
, "sessionInfo");
46 return session_info
->security_token
;
49 /* performs an access check from inside the module stack
50 * given the dn of the object to be checked, the required access
51 * guid is either the guid of the extended right, or NULL
54 int dsdb_module_check_access_on_dn(struct ldb_module
*module
,
58 const struct GUID
*guid
,
59 struct ldb_request
*parent
)
62 struct ldb_result
*acl_res
;
63 static const char *acl_attrs
[] = {
64 "nTSecurityDescriptor",
68 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
69 struct auth_session_info
*session_info
70 = (struct auth_session_info
*)ldb_get_opaque(ldb
, "sessionInfo");
72 return ldb_operr(ldb
);
74 ret
= dsdb_module_search_dn(module
, mem_ctx
, &acl_res
, dn
,
76 DSDB_FLAG_NEXT_MODULE
|
77 DSDB_SEARCH_SHOW_RECYCLED
,
79 if (ret
!= LDB_SUCCESS
) {
80 ldb_asprintf_errstring(ldb_module_get_ctx(module
),
81 "access_check: failed to find object %s\n",
82 ldb_dn_get_linearized(dn
));
85 return dsdb_check_access_on_dn_internal(ldb
, acl_res
,
87 session_info
->security_token
,
93 int acl_check_access_on_attribute(struct ldb_module
*module
,
95 struct security_descriptor
*sd
,
96 struct dom_sid
*rp_sid
,
98 const struct dsdb_attribute
*attr
)
102 uint32_t access_granted
;
103 struct object_tree
*root
= NULL
;
104 struct object_tree
*new_node
= NULL
;
105 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
106 struct security_token
*token
= acl_user_token(module
);
108 if (!GUID_all_zero(&attr
->attributeSecurityGUID
)) {
109 if (!insert_in_object_tree(tmp_ctx
,
110 &attr
->attributeSecurityGUID
,
113 DEBUG(10, ("acl_search: cannot add to object tree securityGUID\n"));
117 if (!insert_in_object_tree(tmp_ctx
,
119 access_mask
, &new_node
,
121 DEBUG(10, ("acl_search: cannot add to object tree attributeGUID\n"));
126 if (!insert_in_object_tree(tmp_ctx
,
130 DEBUG(10, ("acl_search: cannot add to object tree attributeGUID\n"));
135 status
= sec_access_check_ds(sd
, token
,
140 if (!NT_STATUS_IS_OK(status
)) {
141 ret
= LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
146 talloc_free(tmp_ctx
);
149 talloc_free(tmp_ctx
);
150 return ldb_operr(ldb_module_get_ctx(module
));
154 /* checks for validated writes */
155 int acl_check_extended_right(TALLOC_CTX
*mem_ctx
,
156 struct security_descriptor
*sd
,
157 struct security_token
*token
,
158 const char *ext_right
,
164 uint32_t access_granted
;
165 struct object_tree
*root
= NULL
;
166 struct object_tree
*new_node
= NULL
;
167 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
169 GUID_from_string(ext_right
, &right
);
171 if (!insert_in_object_tree(tmp_ctx
, &right
, right_type
,
173 DEBUG(10, ("acl_ext_right: cannot add to object tree\n"));
174 talloc_free(tmp_ctx
);
175 return LDB_ERR_OPERATIONS_ERROR
;
177 status
= sec_access_check_ds(sd
, token
,
183 if (!NT_STATUS_IS_OK(status
)) {
184 talloc_free(tmp_ctx
);
185 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS
;
187 talloc_free(tmp_ctx
);
191 const char *acl_user_name(TALLOC_CTX
*mem_ctx
, struct ldb_module
*module
)
193 struct ldb_context
*ldb
= ldb_module_get_ctx(module
);
194 struct auth_session_info
*session_info
195 = (struct auth_session_info
*)ldb_get_opaque(ldb
, "sessionInfo");
197 return "UNKNOWN (NULL)";
200 return talloc_asprintf(mem_ctx
, "%s\\%s",
201 session_info
->info
->domain_name
,
202 session_info
->info
->account_name
);