--- /dev/null
+/*
+ ldb database library
+
+ Copyright (C) Simo Sorce 2006-2008
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2009
+ Copyright (C) Stefan Metzmacher 2009
+ Copyright (C) Matthias Dieter Wallnöfer 2010
+
+ 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 Lesser General Public
+ License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+ * Name: ldb
+ *
+ * Component: objectclass attribute checking module
+ *
+ * Description: this checks the attributes on a directory entry (if they're
+ * allowed, if the syntax is correct, if mandatory ones are missing,
+ * denies the deletion of mandatory ones...). The module contains portions
+ * of the "objectclass" and the "validate_update" LDB module.
+ *
+ * Author: Matthias Dieter Wallnöfer
+ */
+
+#include "includes.h"
+#include "ldb_module.h"
+#include "dsdb/samdb/samdb.h"
+
+struct oc_context {
+
+ struct ldb_module *module;
+ struct ldb_request *req;
+ const struct dsdb_schema *schema;
+
+ struct ldb_reply *search_res;
+ struct ldb_reply *mod_ares;
+};
+
+static struct oc_context *oc_init_context(struct ldb_module *module,
+ struct ldb_request *req)
+{
+ struct ldb_context *ldb;
+ struct oc_context *ac;
+
+ ldb = ldb_module_get_ctx(module);
+
+ ac = talloc_zero(req, struct oc_context);
+ if (ac == NULL) {
+ ldb_oom(ldb);
+ return NULL;
+ }
+
+ ac->module = module;
+ ac->req = req;
+ ac->schema = dsdb_get_schema(ldb, ac);
+
+ return ac;
+}
+
+static int oc_op_callback(struct ldb_request *req, struct ldb_reply *ares);
+
+static int attr_handler(struct oc_context *ac)
+{
+ struct ldb_context *ldb;
+ struct ldb_message *msg;
+ struct ldb_request *child_req;
+ const struct dsdb_attribute *attr;
+ unsigned int i;
+ int ret;
+ WERROR werr;
+
+ ldb = ldb_module_get_ctx(ac->module);
+
+ if (ac->req->operation == LDB_ADD) {
+ msg = ldb_msg_copy_shallow(ac, ac->req->op.add.message);
+ } else {
+ msg = ldb_msg_copy_shallow(ac, ac->req->op.mod.message);
+ }
+ if (msg == NULL) {
+ ldb_oom(ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ /* Check if attributes exist in the schema, if the values match,
+ * if they're not operational and fix the names to the match the schema
+ * case */
+ for (i = 0; i < msg->num_elements; i++) {
+ attr = dsdb_attribute_by_lDAPDisplayName(ac->schema,
+ msg->elements[i].name);
+ if (attr == NULL) {
+ ldb_asprintf_errstring(ldb, "objectclass_attrs: attribute '%s' on entry '%s' was not found in the schema!",
+ msg->elements[i].name,
+ ldb_dn_get_linearized(msg->dn));
+ return LDB_ERR_NO_SUCH_ATTRIBUTE;
+ }
+
+ werr = attr->syntax->validate_ldb(ldb, ac->schema, attr,
+ &msg->elements[i]);
+ if (!W_ERROR_IS_OK(werr)) {
+ ldb_asprintf_errstring(ldb, "objectclass_attrs: attribute '%s' on entry '%s' contains at least one invalid value!",
+ msg->elements[i].name,
+ ldb_dn_get_linearized(msg->dn));
+ return LDB_ERR_INVALID_ATTRIBUTE_SYNTAX;
+ }
+
+ if ((attr->systemFlags & DS_FLAG_ATTR_IS_CONSTRUCTED) != 0) {
+ ldb_asprintf_errstring(ldb, "objectclass_attrs: attribute '%s' on entry '%s' is constructed!",
+ msg->elements[i].name,
+ ldb_dn_get_linearized(msg->dn));
+ if (ac->req->operation == LDB_ADD) {
+ return LDB_ERR_UNDEFINED_ATTRIBUTE_TYPE;
+ } else {
+ return LDB_ERR_CONSTRAINT_VIOLATION;
+ }
+ }
+
+ /* subsitute the attribute name to match in case */
+ msg->elements[i].name = attr->lDAPDisplayName;
+ }
+
+ if (ac->req->operation == LDB_ADD) {
+ ret = ldb_build_add_req(&child_req, ldb, ac,
+ msg, ac->req->controls,
+ ac, oc_op_callback, ac->req);
+ } else {
+ ret = ldb_build_mod_req(&child_req, ldb, ac,
+ msg, ac->req->controls,
+ ac, oc_op_callback, ac->req);
+ }
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ return ldb_next_request(ac->module, child_req);
+}
+
+static int attr_handler2(struct oc_context *ac)
+{
+ struct ldb_context *ldb;
+ struct ldb_message_element *oc_element;
+ struct ldb_message *msg;
+ const char **must_contain, **may_contain, **found_must_contain;
+ const struct dsdb_attribute *attr;
+ unsigned int i;
+ bool found;
+
+ ldb = ldb_module_get_ctx(ac->module);
+
+ if (ac->search_res == NULL) {
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ /* We rely here on the preceeding "objectclass" LDB module which did
+ * already fix up the objectclass list (inheritance, order...). */
+ oc_element = ldb_msg_find_element(ac->search_res->message,
+ "objectClass");
+ if (oc_element == NULL) {
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ must_contain = dsdb_full_attribute_list(ac, ac->schema, oc_element,
+ DSDB_SCHEMA_ALL_MUST);
+ may_contain = dsdb_full_attribute_list(ac, ac->schema, oc_element,
+ DSDB_SCHEMA_ALL_MAY);
+ found_must_contain = const_str_list(str_list_copy(ac, must_contain));
+ if ((must_contain == NULL) || (may_contain == NULL)
+ || (found_must_contain == NULL)) {
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ /* Check if all specified attributes are valid in the given
+ * objectclasses. */
+ msg = ac->search_res->message;
+ for (i = 0; i < msg->num_elements; i++) {
+ attr = dsdb_attribute_by_lDAPDisplayName(ac->schema,
+ msg->elements[i].name);
+ if (attr == NULL) {
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ /* We can use "str_list_check" with "strcmp" here since the
+ * attribute informations from the schema are always equal
+ * up-down-cased. */
+ found = str_list_check(must_contain, attr->lDAPDisplayName);
+ if (found) {
+ str_list_remove(found_must_contain, attr->lDAPDisplayName);
+ } else {
+ found = str_list_check(may_contain, attr->lDAPDisplayName);
+ }
+ if (!found) {
+ ldb_asprintf_errstring(ldb, "objectclass_attrs: attribute '%s' on entry '%s' does not exist in the specified objectclasses!",
+ msg->elements[i].name,
+ ldb_dn_get_linearized(msg->dn));
+ return LDB_ERR_OBJECT_CLASS_VIOLATION;
+ }
+ }
+
+ if (found_must_contain[0] != NULL) {
+ ldb_asprintf_errstring(ldb, "objectclass_attrs: at least one mandatory attribute ('%s') on entry '%s' wasn't specified!",
+ found_must_contain[0],
+ ldb_dn_get_linearized(msg->dn));
+ return LDB_ERR_OBJECT_CLASS_VIOLATION;
+ }
+
+ return ldb_module_done(ac->req, ac->mod_ares->controls,
+ ac->mod_ares->response, LDB_SUCCESS);
+}
+
+static int get_search_callback(struct ldb_request *req, struct ldb_reply *ares)
+{
+ struct ldb_context *ldb;
+ struct oc_context *ac;
+ int ret;
+
+ ac = talloc_get_type(req->context, struct oc_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) {
+ return ldb_module_done(ac->req, ares->controls,
+ ares->response, ares->error);
+ }
+
+ ldb_reset_err_string(ldb);
+
+ 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 = attr_handler2(ac);
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL, ret);
+ }
+ break;
+ }
+
+ return LDB_SUCCESS;
+}
+
+static int oc_op_callback(struct ldb_request *req, struct ldb_reply *ares)
+{
+ struct oc_context *ac;
+ struct ldb_context *ldb;
+ struct ldb_request *search_req;
+ struct ldb_dn *base_dn;
+ int ret;
+
+ ac = talloc_get_type(req->context, struct oc_context);
+ ldb = ldb_module_get_ctx(ac->module);
+
+ if (!ares) {
+ return ldb_module_done(ac->req, NULL, NULL,
+ LDB_ERR_OPERATIONS_ERROR);
+ }
+
+ if (ares->type == LDB_REPLY_REFERRAL) {
+ return ldb_module_send_referral(ac->req, ares->referral);
+ }
+
+ 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);
+ }
+
+ ac->search_res = NULL;
+ ac->mod_ares = talloc_steal(ac, ares);
+
+ /* This looks up all attributes of our just added/modified entry */
+ base_dn = ac->req->operation == LDB_ADD ? ac->req->op.add.message->dn
+ : ac->req->op.mod.message->dn;
+ ret = ldb_build_search_req(&search_req, ldb, ac, base_dn,
+ LDB_SCOPE_BASE, "(objectClass=*)",
+ NULL, NULL, ac,
+ get_search_callback, ac->req);
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL, ret);
+ }
+
+ ret = ldb_request_add_control(search_req, LDB_CONTROL_SHOW_DELETED_OID,
+ true, NULL);
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL, ret);
+ }
+
+ ret = ldb_next_request(ac->module, search_req);
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL, ret);
+ }
+
+ /* "ldb_module_done" isn't called here since we need to do additional
+ * checks. It is called at the end of "attr_handler2". */
+ return LDB_SUCCESS;
+}
+
+static int objectclass_attrs_add(struct ldb_module *module,
+ struct ldb_request *req)
+{
+ struct ldb_context *ldb;
+ struct oc_context *ac;
+
+ ldb = ldb_module_get_ctx(module);
+
+ ldb_debug(ldb, LDB_DEBUG_TRACE, "objectclass_attrs_add\n");
+
+ /* do not manipulate our control entries */
+ if (ldb_dn_is_special(req->op.add.message->dn)) {
+ return ldb_next_request(module, req);
+ }
+
+ ac = oc_init_context(module, req);
+ if (ac == NULL) {
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ /* without schema, there isn't much to do here */
+ if (ac->schema == NULL) {
+ talloc_free(ac);
+ return ldb_next_request(module, req);
+ }
+
+ return attr_handler(ac);
+}
+
+static int objectclass_attrs_modify(struct ldb_module *module,
+ struct ldb_request *req)
+{
+ struct ldb_context *ldb;
+ struct oc_context *ac;
+
+ ldb = ldb_module_get_ctx(module);
+
+ ldb_debug(ldb, LDB_DEBUG_TRACE, "objectclass_attrs_modify\n");
+
+ /* do not manipulate our control entries */
+ if (ldb_dn_is_special(req->op.mod.message->dn)) {
+ return ldb_next_request(module, req);
+ }
+
+ ac = oc_init_context(module, req);
+ if (ac == NULL) {
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ /* without schema, there isn't much to do here */
+ if (ac->schema == NULL) {
+ talloc_free(ac);
+ return ldb_next_request(module, req);
+ }
+
+ return attr_handler(ac);
+}
+
+_PUBLIC_ const struct ldb_module_ops ldb_objectclass_attrs_module_ops = {
+ .name = "objectclass_attrs",
+ .add = objectclass_attrs_add,
+ .modify = objectclass_attrs_modify
+};
git.samba.org / amitay / samba.git / commitdiff