s4:dsdb Don't allow creation of systemOnly objectclasses
[sfrench/samba-autobuild/.git] / source4 / dsdb / samdb / ldb_modules / objectclass.c
index eb35ad052ebbc6e166cff0d30d2991a66e7dd1f3..b3d54612dde9a15ddc7fad3872dded1b6d4242d8 100644 (file)
@@ -138,7 +138,13 @@ static int objectclass_sort(struct ldb_module *module,
                if (!current->objectclass) {
                        ldb_asprintf_errstring(ldb, "objectclass %.*s is not a valid objectClass in schema", 
                                               (int)objectclass_element->values[i].length, (const char *)objectclass_element->values[i].data);
-                       return LDB_ERR_OBJECT_CLASS_VIOLATION;
+                       /* This looks weird, but windows apparently returns this for invalid objectClass values */
+                       return LDB_ERR_NO_SUCH_ATTRIBUTE;
+               } else if (current->objectclass->isDefunct) {
+                       ldb_asprintf_errstring(ldb, "objectclass %.*s marked as isDefunct objectClass in schema - not valid for new objects", 
+                                              (int)objectclass_element->values[i].length, (const char *)objectclass_element->values[i].data);
+                       /* This looks weird, but windows apparently returns this for invalid objectClass values */
+                       return LDB_ERR_NO_SUCH_ATTRIBUTE;
                }
 
                /* this is the root of the tree.  We will start
@@ -231,49 +237,6 @@ 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;
@@ -293,6 +256,8 @@ static int get_search_callback(struct ldb_request *req, struct ldb_reply *ares)
                                        ares->response, ares->error);
        }
 
+       ldb_reset_err_string(ldb);
+
        switch (ares->type) {
        case LDB_REPLY_ENTRY:
                if (ac->search_res != NULL) {
@@ -396,7 +361,8 @@ static int fix_attributes(struct ldb_context *ldb, const struct dsdb_schema *sch
                if (!attribute) {
                        if (strcasecmp(msg->elements[i].name, "clearTextPassword") != 0) {
                                ldb_asprintf_errstring(ldb, "attribute %s is not a valid attribute in schema", msg->elements[i].name);
-                               return LDB_ERR_UNDEFINED_ATTRIBUTE_TYPE;
+                               /* Apparently Windows sends exactly this behaviour */
+                               return LDB_ERR_NO_SUCH_ATTRIBUTE;
                        }
                } else {
                        msg->elements[i].name = attribute->lDAPDisplayName;
@@ -536,7 +502,6 @@ 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 +511,7 @@ 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 +530,10 @@ 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 +544,7 @@ 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 +554,19 @@ static int objectclass_do_add(struct oc_context *ac)
                        if (!current->next) {
                                struct ldb_message_element *el;
                                int32_t systemFlags = 0;
+                               const char *rdn_name = ldb_dn_get_rdn_name(msg->dn);
+                               if (ldb_attr_cmp(rdn_name, current->objectclass->rDNAttID) != 0) {
+                                       ldb_asprintf_errstring(ldb, "RDN %s is not correct for most specific structural objectclass %s, should be %s", 
+                                                              rdn_name, current->objectclass->lDAPDisplayName, current->objectclass->rDNAttID);
+                                       return LDB_ERR_NAMING_VIOLATION;
+                               }
+
+                               if (current->objectclass->systemOnly && !ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
+                                       ldb_asprintf_errstring(ldb, "objectClass %s is systemOnly, rejecting creation of %s",
+                                                              current->objectclass->lDAPDisplayName, ldb_dn_get_linearized(msg->dn));
+                                       return LDB_ERR_UNWILLING_TO_PERFORM;
+                               }
+
                                if (!ldb_msg_find_element(msg, "objectCategory")) {
                                        value = talloc_strdup(msg, current->objectclass->defaultObjectCategory);
                                        if (value == NULL) {
@@ -599,15 +577,9 @@ 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 +591,7 @@ 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 +604,7 @@ 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);
@@ -997,7 +969,6 @@ static int objectclass_rename(struct ldb_module *module, struct ldb_request *req
        struct oc_context *ac;
        struct ldb_dn *parent_dn;
        int ret;
-       struct ldb_control **ctrl;
 
        ldb = ldb_module_get_ctx(module);
 
@@ -1026,36 +997,27 @@ static int objectclass_rename(struct ldb_module *module, struct ldb_request *req
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
-       /* we have to add the show deleted control, as otherwise DRS
-          deletes will be refused as we will think the target parent
-          does not exist */
-       ctrl = talloc_array(req, struct ldb_control, 2);
-       if (!ctrl) {
-               ldb_oom(ldb);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-       ctrl[0] = talloc(ctrl, struct ldb_control);
-       if (!ctrl[0]) {
-               ldb_oom(ldb);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-       ctrl[0]->oid = LDB_CONTROL_SHOW_DELETED_OID;
-       ctrl[0]->critical = 0;
-       ctrl[0]->data = NULL;
-       ctrl[1] = NULL;
-
        /* note that the results of this search are kept and used to
           update the parentGUID in objectclass_rename_callback() */
        ret = ldb_build_search_req(&search_req, ldb,
                                   ac, parent_dn, LDB_SCOPE_BASE,
                                   "(objectClass=*)",
-                                  attrs, ctrl
+                                  attrs, NULL
                                   ac, get_search_callback,
                                   req);
        if (ret != LDB_SUCCESS) {
                return ret;
        }
 
+       /* we have to add the show deleted control, as otherwise DRS
+          deletes will be refused as we will think the target parent
+          does not exist */
+       ret = ldb_request_add_control(search_req, LDB_CONTROL_SHOW_DELETED_OID, false, NULL);
+
+       if (ret != LDB_SUCCESS) {
+               return ret;
+       }
+
        ac->step_fn = objectclass_do_rename;
 
        return ldb_next_request(ac->module, search_req);