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-rw-r--r--source4/dsdb/samdb/ldb_modules/objectclass.c340
1 files changed, 191 insertions, 149 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/objectclass.c b/source4/dsdb/samdb/ldb_modules/objectclass.c
index 7f8c620e16..b15dff01f7 100644
--- a/source4/dsdb/samdb/ldb_modules/objectclass.c
+++ b/source4/dsdb/samdb/ldb_modules/objectclass.c
@@ -656,11 +656,9 @@ static int objectclass_modify(struct ldb_module *module, struct ldb_request *req
struct ldb_context *ldb = ldb_module_get_ctx(module);
struct ldb_message_element *objectclass_element;
struct ldb_message *msg;
- struct class_list *sorted, *current;
struct ldb_request *down_req;
struct oc_context *ac;
- TALLOC_CTX *mem_ctx;
- char *value;
+ bool oc_changes = false;
int ret;
ldb_debug(ldb, LDB_DEBUG_TRACE, "objectclass_modify\n");
@@ -682,131 +680,29 @@ static int objectclass_modify(struct ldb_module *module, struct ldb_request *req
return LDB_ERR_OPERATIONS_ERROR;
}
+ /* Without schema, there isn't much to do here */
if (ac->schema == NULL) {
- /* Without schema, there isn't much to do here */
talloc_free(ac);
return ldb_next_request(module, req);
}
- /* If no part of this touches the objectClass, then we don't
- * need to make any changes. */
- objectclass_element = ldb_msg_find_element(req->op.mod.message, "objectClass");
-
- /* If the only operation is the deletion of the objectClass
- * then go on with just fixing the attribute case */
- if (!objectclass_element) {
- msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
- if (msg == NULL) {
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- ret = ldb_build_mod_req(&down_req, ldb, ac,
- msg,
- req->controls,
- ac, oc_op_callback,
- req);
- if (ret != LDB_SUCCESS) {
- return ret;
- }
-
- /* go on with the call chain */
- return ldb_next_request(module, down_req);
+ msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
+ if (msg == NULL) {
+ return LDB_ERR_OPERATIONS_ERROR;
}
- switch (objectclass_element->flags & LDB_FLAG_MOD_MASK) {
- case LDB_FLAG_MOD_DELETE:
- if (objectclass_element->num_values == 0) {
- return LDB_ERR_OBJECT_CLASS_MODS_PROHIBITED;
- }
- break;
-
- case LDB_FLAG_MOD_REPLACE:
- mem_ctx = talloc_new(ac);
- if (mem_ctx == NULL) {
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
- if (msg == NULL) {
- talloc_free(mem_ctx);
- return LDB_ERR_OPERATIONS_ERROR;
- }
+ /* For now change everything except the objectclasses */
- ret = objectclass_sort(module, ac->schema, mem_ctx,
- objectclass_element, &sorted);
- if (ret != LDB_SUCCESS) {
- talloc_free(mem_ctx);
- return ret;
- }
-
- /* We must completely replace the existing objectClass entry,
- * because we need it sorted */
-
+ objectclass_element = ldb_msg_find_element(msg, "objectClass");
+ if (objectclass_element != NULL) {
ldb_msg_remove_attr(msg, "objectClass");
- ret = ldb_msg_add_empty(msg, "objectClass", LDB_FLAG_MOD_REPLACE, NULL);
-
- if (ret != LDB_SUCCESS) {
- talloc_free(mem_ctx);
- return ret;
- }
-
- /* Move from the linked list back into an ldb msg */
- for (current = sorted; current; current = current->next) {
- /* copy the value as this string is on the schema
- * context and we can't rely on it not changing
- * before the operation is over */
- value = talloc_strdup(msg,
- current->objectclass->lDAPDisplayName);
- if (value == NULL) {
- ldb_oom(ldb);
- talloc_free(mem_ctx);
- return LDB_ERR_OPERATIONS_ERROR;
- }
- ret = ldb_msg_add_string(msg, "objectClass", value);
- if (ret != LDB_SUCCESS) {
- ldb_set_errstring(ldb,
- "objectclass: could not re-add sorted "
- "objectclass to modify msg");
- talloc_free(mem_ctx);
- return ret;
- }
- }
-
- talloc_free(mem_ctx);
-
- ret = ldb_msg_sanity_check(ldb, msg);
- if (ret != LDB_SUCCESS) {
- return ret;
- }
-
- ret = ldb_build_mod_req(&down_req, ldb, ac,
- msg,
- req->controls,
- ac, oc_op_callback,
- req);
- if (ret != LDB_SUCCESS) {
- return ret;
- }
-
- /* go on with the call chain */
- return ldb_next_request(module, down_req);
- }
-
- /* This isn't the default branch of the switch, but a 'in any
- * other case'. When a delete isn't for all objectClasses for
- * example
- */
-
- msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
- if (msg == NULL) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ oc_changes = true;
}
ret = ldb_build_mod_req(&down_req, ldb, ac,
msg,
- req->controls,
- ac, oc_modify_callback,
+ req->controls, ac,
+ oc_changes ? oc_modify_callback : oc_op_callback,
req);
if (ret != LDB_SUCCESS) {
return ret;
@@ -817,8 +713,8 @@ static int objectclass_modify(struct ldb_module *module, struct ldb_request *req
static int oc_modify_callback(struct ldb_request *req, struct ldb_reply *ares)
{
- struct ldb_context *ldb;
static const char * const attrs[] = { "objectClass", NULL };
+ struct ldb_context *ldb;
struct ldb_request *search_req;
struct oc_context *ac;
int ret;
@@ -848,8 +744,11 @@ static int oc_modify_callback(struct ldb_request *req, struct ldb_reply *ares)
talloc_free(ares);
- ret = ldb_build_search_req(&search_req, ldb, ac,
- ac->req->op.mod.message->dn, LDB_SCOPE_BASE,
+ /* this looks up the real existing object for fetching some important
+ * informations (objectclasses) */
+ ret = ldb_build_search_req(&search_req, ldb,
+ ac, ac->req->op.mod.message->dn,
+ LDB_SCOPE_BASE,
"(objectClass=*)",
attrs, NULL,
ac, get_search_callback,
@@ -864,6 +763,7 @@ static int oc_modify_callback(struct ldb_request *req, struct ldb_reply *ares)
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
+
return LDB_SUCCESS;
}
@@ -872,66 +772,188 @@ static int objectclass_do_mod(struct oc_context *ac)
struct ldb_context *ldb;
struct ldb_request *mod_req;
char *value;
- struct ldb_message_element *objectclass_element;
+ struct ldb_message_element *oc_el_entry, *oc_el_change;
+ struct ldb_val *vals;
struct ldb_message *msg;
TALLOC_CTX *mem_ctx;
struct class_list *sorted, *current;
+ const struct dsdb_class *objectclass;
+ unsigned int i, j;
+ bool found, replace = false;
int ret;
ldb = ldb_module_get_ctx(ac->module);
+ /* we should always have a valid entry when we enter here */
if (ac->search_res == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
- mem_ctx = talloc_new(ac);
- if (mem_ctx == NULL) {
+ oc_el_entry = ldb_msg_find_element(ac->search_res->message,
+ "objectClass");
+ if (oc_el_entry == NULL) {
+ /* existing entry without a valid object class? */
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ oc_el_change = ldb_msg_find_element(ac->req->op.mod.message,
+ "objectClass");
+ if (oc_el_change == NULL) {
+ /* we should have an objectclass change operation */
return LDB_ERR_OPERATIONS_ERROR;
}
/* use a new message structure */
msg = ldb_msg_new(ac);
if (msg == NULL) {
- ldb_set_errstring(ldb,
- "objectclass: could not create new modify msg");
- talloc_free(mem_ctx);
+ ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
- /* This is now the objectClass list from the database */
- objectclass_element = ldb_msg_find_element(ac->search_res->message,
- "objectClass");
- if (!objectclass_element) {
- /* Where did it go? bail now... */
- talloc_free(mem_ctx);
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- /* modify dn */
msg->dn = ac->req->op.mod.message->dn;
- ret = objectclass_sort(ac->module, ac->schema, mem_ctx,
- objectclass_element, &sorted);
- if (ret != LDB_SUCCESS) {
- return ret;
+ mem_ctx = talloc_new(ac);
+ if (mem_ctx == NULL) {
+ ldb_oom(ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
}
- /* We must completely replace the existing objectClass entry.
- * We could do a constrained add/del, but we are meant to be
- * in a transaction... */
+ switch (oc_el_change->flags & LDB_FLAG_MOD_MASK) {
+ case LDB_FLAG_MOD_ADD:
+ /* Merge the two message elements */
+ for (i = 0; i < oc_el_change->num_values; i++) {
+ for (j = 0; j < oc_el_entry->num_values; j++) {
+ if (strcasecmp((char *)oc_el_change->values[i].data,
+ (char *)oc_el_entry->values[j].data) == 0) {
+ /* we cannot add an already existing object class */
+ talloc_free(mem_ctx);
+ return LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS;
+ }
+ }
+ /* append the new object class value - code was copied
+ * from "ldb_msg_add_value" */
+ vals = talloc_realloc(oc_el_entry, oc_el_entry->values,
+ struct ldb_val,
+ oc_el_entry->num_values + 1);
+ if (vals == NULL) {
+ ldb_oom(ldb);
+ talloc_free(mem_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+ oc_el_entry->values = vals;
+ oc_el_entry->values[oc_el_entry->num_values] =
+ oc_el_change->values[i];
+ ++(oc_el_entry->num_values);
+ }
+
+ objectclass = get_last_structural_class(ac->schema,
+ oc_el_change);
+ if (objectclass != NULL) {
+ /* we cannot add a new structural object class */
+ talloc_free(mem_ctx);
+ return LDB_ERR_OBJECT_CLASS_VIOLATION;
+ }
+
+ /* Now do the sorting */
+ ret = objectclass_sort(ac->module, ac->schema, mem_ctx,
+ oc_el_entry, &sorted);
+ if (ret != LDB_SUCCESS) {
+ talloc_free(mem_ctx);
+ return ret;
+ }
+
+ break;
+
+ case LDB_FLAG_MOD_REPLACE:
+ /* Do the sorting for the change message element */
+ ret = objectclass_sort(ac->module, ac->schema, mem_ctx,
+ oc_el_change, &sorted);
+ if (ret != LDB_SUCCESS) {
+ talloc_free(mem_ctx);
+ return ret;
+ }
+
+ /* this is a replace */
+ replace = true;
- ret = ldb_msg_add_empty(msg, "objectClass", LDB_FLAG_MOD_REPLACE, NULL);
+ break;
+
+ case LDB_FLAG_MOD_DELETE:
+ /* get the actual top-most structural objectclass */
+ objectclass = get_last_structural_class(ac->schema,
+ oc_el_entry);
+ if (objectclass == NULL) {
+ talloc_free(mem_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ /* Merge the two message elements */
+ for (i = 0; i < oc_el_change->num_values; i++) {
+ found = false;
+ for (j = 0; j < oc_el_entry->num_values; j++) {
+ if (strcasecmp((char *)oc_el_change->values[i].data,
+ (char *)oc_el_entry->values[j].data) == 0) {
+ found = true;
+ /* delete the object class value -
+ * code was copied from
+ * "ldb_msg_remove_element" */
+ if (j != oc_el_entry->num_values - 1) {
+ memmove(&oc_el_entry->values[j],
+ &oc_el_entry->values[j+1],
+ ((oc_el_entry->num_values-1) - j)*sizeof(struct ldb_val));
+ }
+ --(oc_el_entry->num_values);
+ break;
+ }
+ }
+ if (!found) {
+ /* we cannot delete a not existing object class */
+ talloc_free(mem_ctx);
+ return LDB_ERR_NO_SUCH_ATTRIBUTE;
+ }
+ }
+
+ /* Make sure that the top-most structural objectclass wasn't
+ * deleted */
+ found = false;
+ for (i = 0; i < oc_el_entry->num_values; i++) {
+ if (strcasecmp(objectclass->lDAPDisplayName,
+ (char *)oc_el_entry->values[i].data) == 0) {
+ found = true; break;
+ }
+ }
+ if (!found) {
+ talloc_free(mem_ctx);
+ return LDB_ERR_OBJECT_CLASS_VIOLATION;
+ }
+
+
+ /* Now do the sorting */
+ ret = objectclass_sort(ac->module, ac->schema, mem_ctx,
+ oc_el_entry, &sorted);
+ if (ret != LDB_SUCCESS) {
+ talloc_free(mem_ctx);
+ return ret;
+ }
+
+ break;
+ }
+
+ ret = ldb_msg_add_empty(msg, "objectClass",
+ LDB_FLAG_MOD_REPLACE, &oc_el_change);
if (ret != LDB_SUCCESS) {
- ldb_set_errstring(ldb, "objectclass: could not clear objectclass in modify msg");
+ ldb_oom(ldb);
talloc_free(mem_ctx);
return ret;
}
-
+
/* Move from the linked list back into an ldb msg */
for (current = sorted; current; current = current->next) {
- value = talloc_strdup(msg, current->objectclass->lDAPDisplayName);
+ value = talloc_strdup(msg,
+ current->objectclass->lDAPDisplayName);
if (value == NULL) {
ldb_oom(ldb);
+ talloc_free(mem_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ldb_msg_add_string(msg, "objectClass", value);
@@ -942,9 +964,32 @@ static int objectclass_do_mod(struct oc_context *ac)
}
}
+ talloc_free(mem_ctx);
+
+ if (replace) {
+ /* Well, on replace we are nearly done: we have to test if
+ * the change and entry message element are identically. We
+ * can use "ldb_msg_element_compare" since now the specified
+ * objectclasses match for sure in case. */
+ ret = ldb_msg_element_compare(oc_el_entry, oc_el_change);
+ if (ret == 0) {
+ ret = ldb_msg_element_compare(oc_el_change,
+ oc_el_entry);
+ }
+ if (ret == 0) {
+ /* they are the same so we are done in this case */
+ return ldb_module_done(ac->req, NULL, NULL,
+ LDB_SUCCESS);
+ } else {
+ /* they're not exactly the same */
+ return LDB_ERR_OBJECT_CLASS_VIOLATION;
+ }
+ }
+
+ /* in the other cases we have the real change left to do */
+
ret = ldb_msg_sanity_check(ldb, msg);
if (ret != LDB_SUCCESS) {
- talloc_free(mem_ctx);
return ret;
}
@@ -954,12 +999,9 @@ static int objectclass_do_mod(struct oc_context *ac)
ac, oc_op_callback,
ac->req);
if (ret != LDB_SUCCESS) {
- talloc_free(mem_ctx);
return ret;
}
- talloc_free(mem_ctx);
- /* perform the modify */
return ldb_next_request(ac->module, mod_req);
}
generated by cgit (git 2.34.1) at 2024-07-30 23:50:28 +0000