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/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Andrew Tridgell 2009
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2009
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "ldb.h"
#include "ldb_module.h"
#include "librpc/ndr/libndr.h"
#include "dsdb/samdb/ldb_modules/util.h"
#include "dsdb/samdb/samdb.h"
#include "dsdb/common/util.h"
#include "libcli/security/security.h"
#include "dsdb/samdb/ldb_modules/schema.h"
/*
* This function determines the (last) structural or 88 object class of a passed
* "objectClass" attribute.
* Without schema this does not work and hence NULL is returned. If the
* "objectClass" attribute has already been sorted then only a check on the
* last value is necessary (MS-ADTS 3.1.1.1.4)
*/
const struct dsdb_class *get_last_structural_class(const struct dsdb_schema *schema,
const struct ldb_message_element *element,
bool sorted)
{
const struct dsdb_class *last_class = NULL;
unsigned int i = 0;
if (schema == NULL) {
return NULL;
}
if (sorted && (element->num_values > 1)) {
i = element->num_values - 1;
}
for (; i < element->num_values; i++){
const struct dsdb_class *tmp_class = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &element->values[i]);
if(tmp_class == NULL) {
continue;
}
if(tmp_class->objectClassCategory > 1) {
continue;
}
if (!last_class) {
last_class = tmp_class;
} else {
if (tmp_class->subClass_order > last_class->subClass_order)
last_class = tmp_class;
}
}
return last_class;
}
int acl_check_access_on_class(struct ldb_module *module,
const struct dsdb_schema *schema,
TALLOC_CTX *mem_ctx,
struct security_descriptor *sd,
struct dom_sid *rp_sid,
uint32_t access_mask,
const char *class_name)
{
int ret;
NTSTATUS status;
uint32_t access_granted;
struct object_tree *root = NULL;
struct object_tree *new_node = NULL;
const struct GUID *guid;
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
struct security_token *token = acl_user_token(module);
if (class_name) {
guid = class_schemaid_guid_by_lDAPDisplayName(schema, class_name);
if (!guid) {
DEBUG(10, ("acl_search: cannot find class %s\n",
class_name));
goto fail;
}
if (!insert_in_object_tree(tmp_ctx,
guid, access_mask,
&root, &new_node)) {
DEBUG(10, ("acl_search: cannot add to object tree guid\n"));
goto fail;
}
}
status = sec_access_check_ds(sd, token,
access_mask,
&access_granted,
root,
rp_sid);
if (!NT_STATUS_IS_OK(status)) {
ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
}
else {
ret = LDB_SUCCESS;
}
return ret;
fail:
return ldb_operr(ldb_module_get_ctx(module));
}
const struct GUID *get_oc_guid_from_message(struct ldb_module *module,
const struct dsdb_schema *schema,
struct ldb_message *msg)
{
struct ldb_message_element *oc_el;
oc_el = ldb_msg_find_element(msg, "objectClass");
if (!oc_el) {
return NULL;
}
return class_schemaid_guid_by_lDAPDisplayName(schema,
(char *)oc_el->values[oc_el->num_values-1].data);
}
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