Owner and group defaulting.

Signed-off-by: Andrew Bartlett <abartlet@samba.org>

6 files changed, 598 insertions, 58 deletions

diff --git a/source4/dsdb/samdb/ldb_modules/config.mk b/source4/dsdb/samdb/ldb_modules/config.mk
index 18144dd2c5..f868f8a9db 100644
--- a/source4/dsdb/samdb/ldb_modules/config.mk
+++ b/source4/dsdb/samdb/ldb_modules/config.mk
@@ -334,3 +334,15 @@ INIT_FUNCTION = LDB_MODULE(operational)
 ################################################
 
 ldb_operational_OBJ_FILES = $(dsdbsrcdir)/samdb/ldb_modules/operational.o
+
+################################################
+# Start MODULE ldb_descriptor
+[MODULE::ldb_descriptor]
+INIT_FUNCTION = LDB_MODULE(descriptor)
+CFLAGS = -Ilib/ldb/include
+PRIVATE_DEPENDENCIES = LIBTALLOC LIBEVENTS LIBSECURITY NDR_SECURITY SAMDB
+SUBSYSTEM = LIBLDB
+# End MODULE ldb_descriptor
+################################################
+
+ldb_descriptor_OBJ_FILES = $(dsdbsrcdir)/samdb/ldb_modules/descriptor.o
diff --git a/source4/dsdb/samdb/ldb_modules/descriptor.c b/source4/dsdb/samdb/ldb_modules/descriptor.c
new file mode 100644
index 0000000000..a22cce76a1
--- /dev/null
+++ b/source4/dsdb/samdb/ldb_modules/descriptor.c
@@ -0,0 +1,459 @@
+   /*
+   ldb database library
+
+   Copyright (C) Simo Sorce  2006-2008
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2007
+   Copyright (C) Nadezhda Ivanova  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/>.
+*/
+
+/*
+ *  Name: ldb
+ *
+ *  Component: DS Security descriptor module
+ *
+ *  Description:
+ *  - Calculate the security descriptor of a newly created object
+ *  - Perform sd recalculation on a move operation
+ *  - Handle sd modification invariants
+ *
+ *  Author: Nadezhda Ivanova
+ */
+
+#include "includes.h"
+#include "ldb_module.h"
+#include "dlinklist.h"
+#include "dsdb/samdb/samdb.h"
+#include "librpc/ndr/libndr.h"
+#include "librpc/gen_ndr/ndr_security.h"
+#include "libcli/security/security.h"
+#include "auth/auth.h"
+#include "param/param.h"
+
+struct descriptor_context {
+		struct ldb_module *module;
+		struct ldb_request *req;
+		struct ldb_reply *search_res;
+		int (*step_fn)(struct descriptor_context *);
+};
+
+static struct dsdb_class * get_last_structural_class(const struct dsdb_schema *schema, struct ldb_message_element *element)
+{
+	struct dsdb_class *last_class = NULL;
+	int i;
+	for (i = 0; i < element->num_values; i++){
+		if (!last_class)
+			last_class = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &element->values[i]);
+		else {
+			struct dsdb_class *tmp_class = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &element->values[i]);
+			if (tmp_class->subClass_order > last_class->subClass_order)
+				last_class = tmp_class;
+		}
+	}
+	return last_class;
+}
+
+struct dom_sid *get_default_ag(TALLOC_CTX *mem_ctx,
+			       struct ldb_dn *dn,
+			       struct security_token *token,
+			       struct ldb_context *ldb)
+{
+	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+	struct ldb_dn *root_base_dn = ldb_get_root_basedn(ldb);
+	struct ldb_dn *schema_base_dn = ldb_get_schema_basedn(ldb);
+	struct ldb_dn *config_base_dn = ldb_get_config_basedn(ldb);
+	const struct dom_sid *domain_sid = samdb_domain_sid(ldb);
+	struct dom_sid *da_sid = dom_sid_add_rid(tmp_ctx, domain_sid, DOMAIN_RID_ADMINS);
+	struct dom_sid *ea_sid = dom_sid_add_rid(tmp_ctx, domain_sid, DOMAIN_RID_ENTERPRISE_ADMINS);
+	struct dom_sid *sa_sid = dom_sid_add_rid(tmp_ctx, domain_sid, DOMAIN_RID_SCHEMA_ADMINS);
+	struct dom_sid *dag_sid;
+
+	if (ldb_dn_compare_base(schema_base_dn, dn) == 0){
+		if (security_token_has_sid(token, sa_sid))
+			dag_sid = dom_sid_dup(mem_ctx, sa_sid);
+		else if (security_token_has_sid(token, ea_sid))
+			dag_sid = dom_sid_dup(mem_ctx, ea_sid);
+		else if (security_token_has_sid(token, da_sid))
+			dag_sid = dom_sid_dup(mem_ctx, da_sid);
+		else
+			dag_sid = NULL;
+	}
+	else if (ldb_dn_compare_base(config_base_dn, dn) == 0){
+		if (security_token_has_sid(token, ea_sid))
+			dag_sid = dom_sid_dup(mem_ctx, ea_sid);
+		else if (security_token_has_sid(token, da_sid))
+			dag_sid = dom_sid_dup(mem_ctx, da_sid);
+		else
+			dag_sid = NULL;
+	}
+	else if (ldb_dn_compare_base(root_base_dn, dn) == 0){
+		if (security_token_has_sid(token, da_sid))
+			dag_sid = dom_sid_dup(mem_ctx, da_sid);
+		else if (security_token_has_sid(token, ea_sid))
+				dag_sid = dom_sid_dup(mem_ctx, ea_sid);
+		else
+			dag_sid = NULL;
+	}
+	else
+		dag_sid = NULL;
+
+	talloc_free(tmp_ctx);
+	return dag_sid;
+}
+
+static struct security_descriptor *get_sd_unpacked(struct ldb_module *module, TALLOC_CTX *mem_ctx,
+					    const struct dsdb_class *objectclass)
+{
+	struct ldb_context *ldb = ldb_module_get_ctx(module);
+	struct security_descriptor *sd;
+	const struct dom_sid *domain_sid = samdb_domain_sid(ldb);
+
+	if (!objectclass->defaultSecurityDescriptor || !domain_sid) {
+		return NULL;
+	}
+
+	sd = sddl_decode(mem_ctx,
+			 objectclass->defaultSecurityDescriptor,
+			 domain_sid);
+	return sd;
+}
+
+static struct dom_sid *get_default_group(TALLOC_CTX *mem_ctx,
+					 struct ldb_context *ldb,
+					 struct dom_sid *dag)
+{
+	int *domainFunctionality;
+
+	domainFunctionality = talloc_get_type(ldb_get_opaque(ldb, "domainFunctionality"), int);
+
+	if (*domainFunctionality && (*domainFunctionality >= DS_BEHAVIOR_WIN2008)){
+		return dag;
+	}
+
+	return NULL;
+}
+
+static DATA_BLOB *get_new_descriptor(struct ldb_module *module,
+				     struct ldb_dn *dn,
+				     TALLOC_CTX *mem_ctx,
+				     const struct dsdb_class *objectclass,
+				     struct ldb_val *parent,
+				     struct ldb_val *object)
+{
+	struct security_descriptor *user_descriptor = NULL, *parent_descriptor = NULL;
+	struct security_descriptor *new_sd;
+	DATA_BLOB *linear_sd;
+	enum ndr_err_code ndr_err;
+	struct ldb_context *ldb = ldb_module_get_ctx(module);
+	struct auth_session_info *session_info
+		= ldb_get_opaque(ldb, "sessionInfo");
+	const struct dom_sid *domain_sid = samdb_domain_sid(ldb);
+	char *sddl_sd;
+	struct dom_sid *default_owner;
+	struct dom_sid *default_group;
+
+	if (object){
+		user_descriptor = talloc(mem_ctx, struct security_descriptor);
+		if(!user_descriptor)
+			return NULL;
+		ndr_err = ndr_pull_struct_blob(object, user_descriptor, NULL,
+					       user_descriptor,
+					       (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
+
+		if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)){
+			talloc_free(user_descriptor);
+			return NULL;
+		}
+	}
+	else
+		user_descriptor = get_sd_unpacked(module, mem_ctx, objectclass);
+
+	if (parent){
+		parent_descriptor = talloc(mem_ctx, struct security_descriptor);
+		if(!parent_descriptor)
+			return NULL;
+		ndr_err = ndr_pull_struct_blob(parent, parent_descriptor, NULL,
+					       parent_descriptor,
+					       (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
+
+		if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)){
+			talloc_free(parent_descriptor);
+			return NULL;
+		}
+	}
+	default_owner = get_default_ag(mem_ctx, dn,
+				       session_info->security_token, ldb);
+	default_group = get_default_group(mem_ctx, ldb, default_owner);
+	new_sd = create_security_descriptor(mem_ctx, parent_descriptor, user_descriptor, true,
+					    NULL, SEC_DACL_AUTO_INHERIT|SEC_SACL_AUTO_INHERIT,
+					    session_info->security_token,
+					    default_owner, default_group,
+					    map_generic_rights_ds);
+	if (!new_sd)
+		return NULL;
+
+
+	sddl_sd = sddl_encode(mem_ctx, new_sd, domain_sid);
+	DEBUG(10, ("Object %s created with desriptor %s", ldb_dn_get_linearized(dn), sddl_sd));
+
+	linear_sd = talloc(mem_ctx, DATA_BLOB);
+	if (!linear_sd) {
+		return NULL;
+	}
+
+	ndr_err = ndr_push_struct_blob(linear_sd, mem_ctx,
+				       lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
+				       new_sd,
+				       (ndr_push_flags_fn_t)ndr_push_security_descriptor);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		return NULL;
+	}
+
+	return linear_sd;
+}
+
+static struct descriptor_context *descriptor_init_context(struct ldb_module *module,
+							  struct ldb_request *req)
+{
+	struct ldb_context *ldb;
+	struct descriptor_context *ac;
+
+	ldb = ldb_module_get_ctx(module);
+
+	ac = talloc_zero(req, struct descriptor_context);
+	if (ac == NULL) {
+		ldb_set_errstring(ldb, "Out of Memory");
+		return NULL;
+	}
+
+	ac->module = module;
+	ac->req = req;
+	return ac;
+}
+
+static int get_search_callback(struct ldb_request *req, struct ldb_reply *ares)
+{
+	struct ldb_context *ldb;
+	struct descriptor_context *ac;
+	int ret;
+
+	ac = talloc_get_type(req->context, struct descriptor_context);
+	ldb = ldb_module_get_ctx(ac->module);
+
+	if (!ares) {
+		return ldb_module_done(ac->req, NULL, NULL,
+					LDB_ERR_OPERATIONS_ERROR);
+	}
+	if (ares->error != LDB_SUCCESS &&
+	    ares->error != LDB_ERR_NO_SUCH_OBJECT) {
+		return ldb_module_done(ac->req, ares->controls,
+					ares->response, ares->error);
+	}
+
+	switch (ares->type) {
+	case LDB_REPLY_ENTRY:
+		if (ac->search_res != NULL) {
+			ldb_set_errstring(ldb, "Too many results");
+			talloc_free(ares);
+			return ldb_module_done(ac->req, NULL, NULL,
+						LDB_ERR_OPERATIONS_ERROR);
+		}
+
+		ac->search_res = talloc_steal(ac, ares);
+		break;
+
+	case LDB_REPLY_REFERRAL:
+		/* ignore */
+		talloc_free(ares);
+		break;
+
+	case LDB_REPLY_DONE:
+		talloc_free(ares);
+		ret = ac->step_fn(ac);
+		if (ret != LDB_SUCCESS) {
+			return ldb_module_done(ac->req, NULL, NULL, ret);
+		}
+		break;
+	}
+
+	return LDB_SUCCESS;
+}
+static int descriptor_op_callback(struct ldb_request *req, struct ldb_reply *ares)
+{
+	struct descriptor_context *ac;
+
+	ac = talloc_get_type(req->context, struct descriptor_context);
+
+	if (!ares) {
+		return ldb_module_done(ac->req, NULL, NULL,
+					LDB_ERR_OPERATIONS_ERROR);
+	}
+	if (ares->error != LDB_SUCCESS) {
+		return ldb_module_done(ac->req, ares->controls,
+					ares->response, ares->error);
+	}
+
+	if (ares->type != LDB_REPLY_DONE) {
+		talloc_free(ares);
+		return ldb_module_done(ac->req, NULL, NULL,
+					LDB_ERR_OPERATIONS_ERROR);
+	}
+
+	return ldb_module_done(ac->req, ares->controls,
+				ares->response, ares->error);
+}
+
+static int descriptor_do_add(struct descriptor_context *ac)
+{
+	struct ldb_context *ldb;
+	const struct dsdb_schema *schema;
+	struct ldb_request *add_req;
+	struct ldb_message_element *objectclass_element, *sd_element = NULL;
+	struct ldb_message *msg;
+	TALLOC_CTX *mem_ctx;
+	int ret;
+	struct ldb_val *sd_val = NULL, *parentsd_val = NULL;
+	DATA_BLOB *sd;
+	struct dsdb_class *objectclass;
+
+	ldb = ldb_module_get_ctx(ac->module);
+	schema = dsdb_get_schema(ldb);
+
+	mem_ctx = talloc_new(ac);
+	if (mem_ctx == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg = ldb_msg_copy_shallow(ac, ac->req->op.add.message);
+
+	/* get the security descriptor values*/
+	sd_element = ldb_msg_find_element(msg, "nTSecurityDescriptor");
+	objectclass_element = ldb_msg_find_element(msg, "objectClass");
+	objectclass = get_last_structural_class(schema, objectclass_element);
+
+	if (!objectclass)
+		return LDB_ERR_OPERATIONS_ERROR;
+
+	if (sd_element)
+		sd_val = &sd_element->values[0];
+	/* NC's have no parent */
+	if ((ldb_dn_compare(msg->dn, (ldb_get_schema_basedn(ldb))) == 0) ||
+			(ldb_dn_compare(msg->dn, (ldb_get_config_basedn(ldb))) == 0) ||
+			(ldb_dn_compare(msg->dn, (ldb_get_root_basedn(ldb))) == 0))
+		parentsd_val = NULL;
+	else if (ac->search_res != NULL)
+		parentsd_val = ldb_msg_find_ldb_val(ac->search_res->message, "nTSecurityDescriptor");
+
+
+	/* get the parent descriptor and the one provided. If not provided, get the default.*/
+	/* convert to security descriptor and calculate */
+	sd = get_new_descriptor(ac->module, msg->dn, mem_ctx, objectclass,
+			parentsd_val, sd_val);
+	if (sd) {
+		ldb_msg_add_steal_value(msg, "nTSecurityDescriptor", sd);
+	}
+
+	talloc_free(mem_ctx);
+	ret = ldb_msg_sanity_check(ldb, msg);
+
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	ret = ldb_build_add_req(&add_req, ldb, ac,
+				msg,
+				ac->req->controls,
+				ac, descriptor_op_callback,
+				ac->req);
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	/* perform the add */
+	return ldb_next_request(ac->module, add_req);
+}
+
+static int descriptor_add(struct ldb_module *module, struct ldb_request *req)
+{
+	struct ldb_context *ldb;
+	struct ldb_request *search_req;
+	struct descriptor_context *ac;
+	struct ldb_dn *parent_dn;
+	int ret;
+	static const char * const descr_attrs[] = { "nTSecurityDescriptor", NULL };
+
+	ldb = ldb_module_get_ctx(module);
+
+	ldb_debug(ldb, LDB_DEBUG_TRACE, "descriptor_add\n");
+
+	if (ldb_dn_is_special(req->op.add.message->dn)) {
+		return ldb_next_request(module, req);
+	}
+
+	ac = descriptor_init_context(module, req);
+	if (ac == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	/* If there isn't a parent, just go on to the add processing */
+	if (ldb_dn_get_comp_num(ac->req->op.add.message->dn) == 1) {
+		return descriptor_do_add(ac);
+	}
+
+	/* get copy of parent DN */
+	parent_dn = ldb_dn_get_parent(ac, ac->req->op.add.message->dn);
+	if (parent_dn == NULL) {
+		ldb_oom(ldb);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	ret = ldb_build_search_req(&search_req, ldb,
+				   ac, parent_dn, LDB_SCOPE_BASE,
+				   "(objectClass=*)", descr_attrs,
+				   NULL,
+				   ac, get_search_callback,
+				   req);
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+	talloc_steal(search_req, parent_dn);
+
+	ac->step_fn = descriptor_do_add;
+
+	return ldb_next_request(ac->module, search_req);
+}
+/* TODO */
+static int descriptor_modify(struct ldb_module *module, struct ldb_request *req)
+{
+	struct ldb_context *ldb = ldb_module_get_ctx(module);
+	ldb_debug(ldb, LDB_DEBUG_TRACE, "descriptor_modify\n");
+	return ldb_next_request(module, req);
+}
+/* TODO */
+static int descriptor_rename(struct ldb_module *module, struct ldb_request *req)
+{
+	struct ldb_context *ldb = ldb_module_get_ctx(module);
+	ldb_debug(ldb, LDB_DEBUG_TRACE, "descriptor_rename\n");
+	return ldb_next_request(module, req);
+}
+
+_PUBLIC_ const struct ldb_module_ops ldb_descriptor_module_ops = {
+	.name		   = "descriptor",
+	.add           = descriptor_add,
+	.modify        = descriptor_modify,
+	.rename        = descriptor_rename,
+};
+
+
diff --git a/source4/dsdb/samdb/ldb_modules/objectclass.c b/source4/dsdb/samdb/ldb_modules/objectclass.c
index 6dbafac965..0246de130c 100644
--- a/source4/dsdb/samdb/ldb_modules/objectclass.c
+++ b/source4/dsdb/samdb/ldb_modules/objectclass.c
@@ -231,49 +231,6 @@ static int objectclass_sort(struct ldb_module *module,
 	return LDB_ERR_OBJECT_CLASS_VIOLATION;
 }
 
-static DATA_BLOB *get_sd(struct ldb_module *module, TALLOC_CTX *mem_ctx, 
-			 const struct dsdb_class *objectclass) 
-{
-	struct ldb_context *ldb = ldb_module_get_ctx(module);
-	enum ndr_err_code ndr_err;
-	DATA_BLOB *linear_sd;
-	struct auth_session_info *session_info
-		= ldb_get_opaque(ldb, "sessionInfo");
-	struct security_descriptor *sd;
-	const struct dom_sid *domain_sid = samdb_domain_sid(ldb);
-
-	if (!objectclass->defaultSecurityDescriptor || !domain_sid) {
-		return NULL;
-	}
-	
-	sd = sddl_decode(mem_ctx, 
-			 objectclass->defaultSecurityDescriptor,
-			 domain_sid);
-
-	if (!sd || !session_info || !session_info->security_token) {
-		return NULL;
-	}
-	
-	sd->owner_sid = session_info->security_token->user_sid;
-	sd->group_sid = session_info->security_token->group_sid;
-	
-	linear_sd = talloc(mem_ctx, DATA_BLOB);
-	if (!linear_sd) {
-		return NULL;
-	}
-
-	ndr_err = ndr_push_struct_blob(linear_sd, mem_ctx, 
-					lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
-				       sd,
-				       (ndr_push_flags_fn_t)ndr_push_security_descriptor);
-	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
-		return NULL;
-	}
-	
-	return linear_sd;
-
-}
-
 static int get_search_callback(struct ldb_request *req, struct ldb_reply *ares)
 {
 	struct ldb_context *ldb;
@@ -536,7 +493,6 @@ static int objectclass_do_add(struct oc_context *ac)
 			return LDB_ERR_UNWILLING_TO_PERFORM;						
 		}
 	}
-
 	if (schema) {
 		ret = fix_attributes(ldb, schema, msg);
 		if (ret != LDB_SUCCESS) {
@@ -546,7 +502,7 @@ static int objectclass_do_add(struct oc_context *ac)
 
 		/* This is now the objectClass list from the database */
 		objectclass_element = ldb_msg_find_element(msg, "objectClass");
-		
+
 		if (!objectclass_element) {
 			/* Where did it go?  bail now... */
 			talloc_free(mem_ctx);
@@ -565,10 +521,10 @@ static int objectclass_do_add(struct oc_context *ac)
 			talloc_free(mem_ctx);
 			return ret;
 		}
-		
+
 		/* We must completely replace the existing objectClass entry,
 		 * because we need it sorted */
-		
+
 		/* Move from the linked list back into an ldb msg */
 		for (current = sorted; current; current = current->next) {
 			value = talloc_strdup(msg, current->objectclass->lDAPDisplayName);
@@ -579,7 +535,7 @@ static int objectclass_do_add(struct oc_context *ac)
 			}
 			ret = ldb_msg_add_string(msg, "objectClass", value);
 			if (ret != LDB_SUCCESS) {
-				ldb_set_errstring(ldb, 
+				ldb_set_errstring(ldb,
 						  "objectclass: could not re-add sorted "
 						  "objectclass to modify msg");
 				talloc_free(mem_ctx);
@@ -589,6 +545,7 @@ static int objectclass_do_add(struct oc_context *ac)
 			if (!current->next) {
 				struct ldb_message_element *el;
 				int32_t systemFlags = 0;
+				DATA_BLOB *sd;
 				if (!ldb_msg_find_element(msg, "objectCategory")) {
 					value = talloc_strdup(msg, current->objectclass->defaultObjectCategory);
 					if (value == NULL) {
@@ -599,15 +556,9 @@ static int objectclass_do_add(struct oc_context *ac)
 					ldb_msg_add_string(msg, "objectCategory", value);
 				}
 				if (!ldb_msg_find_element(msg, "showInAdvancedViewOnly") && (current->objectclass->defaultHidingValue == true)) {
-					ldb_msg_add_string(msg, "showInAdvancedViewOnly", 
+					ldb_msg_add_string(msg, "showInAdvancedViewOnly",
 							   "TRUE");
 				}
-				if (!ldb_msg_find_element(msg, "nTSecurityDescriptor")) {
-					DATA_BLOB *sd = get_sd(ac->module, mem_ctx, current->objectclass);
-					if (sd) {
-						ldb_msg_add_steal_value(msg, "nTSecurityDescriptor", sd);
-					}
-				}
 
 				/* There are very special rules for systemFlags, see MS-ADTS 3.1.1.5.2.4 */
 				el = ldb_msg_find_element(msg, "systemFlags");
@@ -619,7 +570,7 @@ static int objectclass_do_add(struct oc_context *ac)
 					/* systemFlags &= ( SYSTEM_FLAG_CONFIG_ALLOW_RENAME | SYSTEM_FLAG_CONFIG_ALLOW_MOVE | SYSTEM_FLAG_CONFIG_LIMITED_MOVE); */
 					ldb_msg_remove_element(msg, el);
 				}
-				
+
 				/* This flag is only allowed on attributeSchema objects */
 				if (ldb_attr_cmp(current->objectclass->lDAPDisplayName, "attributeSchema") == 0) {
 					systemFlags &= ~SYSTEM_FLAG_ATTR_IS_RDN;
@@ -632,7 +583,7 @@ static int objectclass_do_add(struct oc_context *ac)
 					   || ldb_attr_cmp(current->objectclass->lDAPDisplayName, "ntDSDSA") == 0) {
 					systemFlags |= (int32_t)(SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE);
 
-				} else if (ldb_attr_cmp(current->objectclass->lDAPDisplayName, "siteLink") == 0 
+				} else if (ldb_attr_cmp(current->objectclass->lDAPDisplayName, "siteLink") == 0
 					   || ldb_attr_cmp(current->objectclass->lDAPDisplayName, "siteLinkBridge") == 0
 					   || ldb_attr_cmp(current->objectclass->lDAPDisplayName, "nTDSConnection") == 0) {
 					systemFlags |= (int32_t)(SYSTEM_FLAG_CONFIG_ALLOW_RENAME);
diff --git a/source4/libcli/security/config.mk b/source4/libcli/security/config.mk
index d08c25d66f..ca545f817f 100644
--- a/source4/libcli/security/config.mk
+++ b/source4/libcli/security/config.mk
@@ -2,6 +2,6 @@
 PUBLIC_DEPENDENCIES = LIBNDR LIBSECURITY_COMMON
 
 LIBSECURITY_OBJ_FILES = $(addprefix $(libclisrcdir)/security/, \
-					   security_token.o access_check.o privilege.o sddl.o) \
+					   security_token.o access_check.o privilege.o sddl.o create_descriptor.o) \
 
 $(eval $(call proto_header_template,$(libclisrcdir)/security/proto.h,$(LIBSECURITY_OBJ_FILES:.o=.c)))
diff --git a/source4/libcli/security/create_descriptor.c b/source4/libcli/security/create_descriptor.c
new file mode 100644
index 0000000000..6a928273b7
--- /dev/null
+++ b/source4/libcli/security/create_descriptor.c
@@ -0,0 +1,117 @@
+/*
+   Copyright (C) Nadezhda Ivanova 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/>.
+*/
+
+/*
+ *  Name: create_descriptor
+ *
+ *  Component: routines for calculating and creating security descriptors
+ *  as described in MS-DTYP 2.5.2.2
+ *
+ *  Description:
+ *
+ *
+ *  Author: Nadezhda Ivanova
+ */
+#include "includes.h"
+#include "libcli/security/security.h"
+
+/* the mapping function for generic rights for DS.(GA,GR,GW,GX)
+ * The mapping function is passed as an argument to the
+ * descriptor calculating routine and depends on the security
+ * manager that calls the calculating routine.
+ * TODO: need similar mappings for the file system and
+ * registry security managers in order to make this code
+ * generic for all security managers
+ */
+
+uint32_t map_generic_rights_ds(uint32_t access_mask)
+{
+	if (access_mask & SEC_GENERIC_ALL){
+		access_mask |= SEC_ADS_GENERIC_ALL;
+		access_mask = ~SEC_GENERIC_ALL;
+	}
+
+	if (access_mask & SEC_GENERIC_EXECUTE){
+		access_mask |= SEC_ADS_GENERIC_EXECUTE;
+		access_mask = ~SEC_GENERIC_EXECUTE;
+	}
+
+	if (access_mask & SEC_GENERIC_WRITE){
+		access_mask |= SEC_ADS_GENERIC_WRITE;
+		access_mask &= ~SEC_GENERIC_WRITE;
+	}
+
+	if (access_mask & SEC_GENERIC_READ){
+		access_mask |= SEC_ADS_GENERIC_READ;
+		access_mask &= ~SEC_GENERIC_READ;
+	}
+
+	return access_mask;
+}
+
+struct security_descriptor *create_security_descriptor(TALLOC_CTX *mem_ctx,
+						       struct security_descriptor *parent_sd,
+						       struct security_descriptor *creator_sd,
+						       bool is_container,
+						       struct GUID *object_list,
+						       uint32_t inherit_flags,
+						       struct security_token *token,
+						       struct dom_sid *default_owner, /* valid only for DS, NULL for the other RSs */
+						       struct dom_sid *default_group, /* valid only for DS, NULL for the other RSs */
+						       uint32_t (*generic_map)(uint32_t access_mask))
+{
+	struct security_descriptor *new_sd;
+	struct dom_sid *new_owner = NULL;
+	struct dom_sid *new_group = NULL;
+
+	new_sd = security_descriptor_initialise(mem_ctx);
+	if (!new_sd)
+		return NULL;
+	if (!creator_sd || !creator_sd->owner_sid){
+		if (inherit_flags & SEC_OWNER_FROM_PARENT)
+			new_owner = parent_sd->owner_sid;
+		else if (!default_owner)
+			new_owner = token->user_sid;
+		else
+			new_owner = default_owner;
+	}
+	else
+		new_owner = creator_sd->owner_sid;
+
+	if (!creator_sd || !creator_sd->group_sid){
+		if (inherit_flags & SEC_GROUP_FROM_PARENT && parent_sd)
+			new_group = parent_sd->group_sid;
+		else if (!default_group)
+			new_group = token->group_sid;
+		else new_group = default_group;
+	}
+	else
+		new_group = creator_sd->group_sid;
+
+	new_sd->owner_sid = talloc_memdup(new_sd, new_owner, sizeof(struct dom_sid));
+	new_sd->group_sid = talloc_memdup(new_sd, new_group, sizeof(struct dom_sid));
+	if (!new_sd->owner_sid || !new_sd->group_sid){
+		talloc_free(new_sd);
+		return NULL;
+	}
+	/* Todo remove */
+	if (creator_sd && creator_sd->type & SEC_DESC_DACL_PRESENT){
+		new_sd->dacl = security_acl_dup(new_sd, creator_sd->dacl);
+		new_sd->type |= SEC_DESC_DACL_PRESENT;
+	}
+	return new_sd;
+}
diff --git a/source4/scripting/python/samba/provision.py b/source4/scripting/python/samba/provision.py
index 8f7859c215..8fef50ca37 100644
--- a/source4/scripting/python/samba/provision.py
+++ b/source4/scripting/python/samba/provision.py
@@ -584,6 +584,7 @@ def setup_samdb_partitions(samdb_path, setup_path, message, lp, session_info,
                     "extended_dn_in",
                     "rdn_name",
                     "objectclass",
+                    "descriptor",
                     "samldb",
                     "password_hash",
                     "operational",