/* ldb database library Copyright (C) Simo Sorce 2006-2008 Copyright (C) Andrew Bartlett 2005-2009 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 . */ /* * Name: ldb * * Component: objectClass sorting module * * Description: * - sort the objectClass attribute into the class * hierarchy, * - fix DNs and attributes into 'standard' case * - Add objectCategory and ntSecurityDescriptor defaults * * Author: Andrew Bartlett */ #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" #include "../libds/common/flags.h" struct oc_context { struct ldb_module *module; struct ldb_request *req; struct ldb_reply *search_res; int (*step_fn)(struct oc_context *); }; struct class_list { struct class_list *prev, *next; const struct dsdb_class *objectclass; }; 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_set_errstring(ldb, "Out of Memory"); return NULL; } ac->module = module; ac->req = req; return ac; } static int objectclass_do_add(struct oc_context *ac); /* Sort objectClasses into correct order, and validate that all * objectClasses specified actually exist in the schema */ static int objectclass_sort(struct ldb_module *module, const struct dsdb_schema *schema, TALLOC_CTX *mem_ctx, struct ldb_message_element *objectclass_element, struct class_list **sorted_out) { struct ldb_context *ldb; int i; int layer; struct class_list *sorted = NULL, *parent_class = NULL, *subclass = NULL, *unsorted = NULL, *current, *poss_subclass, *poss_parent, *new_parent; ldb = ldb_module_get_ctx(module); /* DESIGN: * * We work on 4 different 'bins' (implemented here as linked lists): * * * sorted: the eventual list, in the order we wish to push * into the database. This is the only ordered list. * * * parent_class: The current parent class 'bin' we are * trying to find subclasses for * * * subclass: The subclasses we have found so far * * * unsorted: The remaining objectClasses * * The process is a matter of filtering objectClasses up from * unsorted into sorted. Order is irrelevent in the later 3 'bins'. * * We start with 'top' (found and promoted to parent_class * initially). Then we find (in unsorted) all the direct * subclasses of 'top'. parent_classes is concatenated onto * the end of 'sorted', and subclass becomes the list in * parent_class. * * We then repeat, until we find no more subclasses. Any left * over classes are added to the end. * */ /* Firstly, dump all the objectClass elements into the * unsorted bin, except for 'top', which is special */ for (i=0; i < objectclass_element->num_values; i++) { current = talloc(mem_ctx, struct class_list); if (!current) { ldb_oom(ldb); return LDB_ERR_OPERATIONS_ERROR; } current->objectclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &objectclass_element->values[i]); 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); /* 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 * looking for subclasses from here */ if (ldb_attr_cmp("top", current->objectclass->lDAPDisplayName) == 0) { DLIST_ADD_END(parent_class, current, struct class_list *); } else { DLIST_ADD_END(unsorted, current, struct class_list *); } } if (parent_class == NULL) { current = talloc(mem_ctx, struct class_list); current->objectclass = dsdb_class_by_lDAPDisplayName(schema, "top"); DLIST_ADD_END(parent_class, current, struct class_list *); } /* For each object: find parent chain */ for (current = unsorted; schema && current; current = current->next) { for (poss_parent = unsorted; poss_parent; poss_parent = poss_parent->next) { if (ldb_attr_cmp(poss_parent->objectclass->lDAPDisplayName, current->objectclass->subClassOf) == 0) { break; } } /* If we didn't get to the end of the list, we need to add this parent */ if (poss_parent || (ldb_attr_cmp("top", current->objectclass->subClassOf) == 0)) { continue; } new_parent = talloc(mem_ctx, struct class_list); new_parent->objectclass = dsdb_class_by_lDAPDisplayName(schema, current->objectclass->subClassOf); DLIST_ADD_END(unsorted, new_parent, struct class_list *); } /* DEBUGGING aid: how many layers are we down now? */ layer = 0; do { layer++; /* Find all the subclasses of classes in the * parent_classes. Push them onto the subclass list */ /* Ensure we don't bother if there are no unsorted entries left */ for (current = parent_class; schema && unsorted && current; current = current->next) { /* Walk the list of possible subclasses in unsorted */ for (poss_subclass = unsorted; poss_subclass; ) { struct class_list *next; /* Save the next pointer, as the DLIST_ macros will change poss_subclass->next */ next = poss_subclass->next; if (ldb_attr_cmp(poss_subclass->objectclass->subClassOf, current->objectclass->lDAPDisplayName) == 0) { DLIST_REMOVE(unsorted, poss_subclass); DLIST_ADD(subclass, poss_subclass); break; } poss_subclass = next; } } /* Now push the parent_classes as sorted, we are done with these. Add to the END of the list by concatenation */ DLIST_CONCATENATE(sorted, parent_class, struct class_list *); /* and now find subclasses of these */ parent_class = subclass; subclass = NULL; /* If we didn't find any subclasses we will fall out * the bottom here */ } while (parent_class); if (!unsorted) { *sorted_out = sorted; return LDB_SUCCESS; } if (!schema) { /* If we don't have schema yet, then just merge the lists again */ DLIST_CONCATENATE(sorted, unsorted, struct class_list *); *sorted_out = sorted; return LDB_SUCCESS; } /* This shouldn't happen, and would break MMC, perhaps there * was no 'top', a conflict in the objectClasses or some other * schema error? */ ldb_asprintf_errstring(ldb, "objectclass %s is not a valid objectClass in objectClass chain", unsorted->objectclass->lDAPDisplayName); return LDB_ERR_OBJECT_CLASS_VIOLATION; } 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 && ares->error != LDB_ERR_NO_SUCH_OBJECT) { 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 = ac->step_fn(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; ac = talloc_get_type(req->context, struct oc_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); } /* Fix up the DN to be in the standard form, taking particular care to match the parent DN This should mean that if the parent is: CN=Users,DC=samba,DC=example,DC=com and a proposed child is cn=Admins ,cn=USERS,dc=Samba,dc=example,dc=COM The resulting DN should be: CN=Admins,CN=Users,DC=samba,DC=example,DC=com */ static int fix_dn(TALLOC_CTX *mem_ctx, struct ldb_dn *newdn, struct ldb_dn *parent_dn, struct ldb_dn **fixed_dn) { char *upper_rdn_attr; /* Fix up the DN to be in the standard form, taking particular care to match the parent DN */ *fixed_dn = ldb_dn_copy(mem_ctx, parent_dn); /* We need the attribute name in upper case */ upper_rdn_attr = strupper_talloc(*fixed_dn, ldb_dn_get_rdn_name(newdn)); if (!upper_rdn_attr) { return LDB_ERR_OPERATIONS_ERROR; } /* Create a new child */ if (ldb_dn_add_child_fmt(*fixed_dn, "X=X") == false) { return LDB_ERR_OPERATIONS_ERROR; } /* And replace it with CN=foo (we need the attribute in upper case */ return ldb_dn_set_component(*fixed_dn, 0, upper_rdn_attr, *ldb_dn_get_rdn_val(newdn)); } /* Fix all attribute names to be in the correct case, and check they are all valid per the schema */ static int fix_attributes(struct ldb_context *ldb, const struct dsdb_schema *schema, struct ldb_message *msg) { int i; for (i=0; i < msg->num_elements; i++) { const struct dsdb_attribute *attribute = dsdb_attribute_by_lDAPDisplayName(schema, msg->elements[i].name); /* Add in a very special case for 'clearTextPassword', * which is used for internal processing only, and is * not presented in the schema */ 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); /* Apparently Windows sends exactly this behaviour */ return LDB_ERR_NO_SUCH_ATTRIBUTE; } } else { msg->elements[i].name = attribute->lDAPDisplayName; } } return LDB_SUCCESS; } static int objectclass_do_add(struct oc_context *ac); static int objectclass_add(struct ldb_module *module, struct ldb_request *req) { struct ldb_context *ldb; struct ldb_request *search_req; struct oc_context *ac; struct ldb_dn *parent_dn; int ret; static const char * const parent_attrs[] = { "objectGUID", "objectClass", NULL }; ldb = ldb_module_get_ctx(module); ldb_debug(ldb, LDB_DEBUG_TRACE, "objectclass_add\n"); /* do not manipulate our control entries */ if (ldb_dn_is_special(req->op.add.message->dn)) { return ldb_next_request(module, req); } /* the objectClass must be specified on add */ if (ldb_msg_find_element(req->op.add.message, "objectClass") == NULL) { return LDB_ERR_OBJECT_CLASS_VIOLATION; } ac = oc_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 objectclass_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=*)", parent_attrs, NULL, ac, get_search_callback, req); if (ret != LDB_SUCCESS) { return ret; } talloc_steal(search_req, parent_dn); ac->step_fn = objectclass_do_add; return ldb_next_request(ac->module, search_req); } static int objectclass_do_add(struct oc_context *ac) { struct ldb_context *ldb; const struct dsdb_schema *schema; struct ldb_request *add_req; char *value; struct ldb_message_element *objectclass_element; struct ldb_message *msg; TALLOC_CTX *mem_ctx; struct class_list *sorted, *current; int ret; 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); /* Check we have a valid parent */ if (ac->search_res == NULL) { if (ldb_dn_compare(ldb_get_root_basedn(ldb), msg->dn) == 0) { /* Allow the tree to be started */ /* but don't keep any error string, it's meaningless */ ldb_set_errstring(ldb, NULL); } else { ldb_asprintf_errstring(ldb, "objectclass: Cannot add %s, parent does not exist!", ldb_dn_get_linearized(msg->dn)); talloc_free(mem_ctx); return LDB_ERR_NO_SUCH_OBJECT; } } else { const struct ldb_val *parent_guid; /* Fix up the DN to be in the standard form, taking particular care to match the parent DN */ ret = fix_dn(msg, ac->req->op.add.message->dn, ac->search_res->message->dn, &msg->dn); if (ret != LDB_SUCCESS) { ldb_asprintf_errstring(ldb, "Could not munge DN %s into normal form", ldb_dn_get_linearized(ac->req->op.add.message->dn)); talloc_free(mem_ctx); return ret; } parent_guid = ldb_msg_find_ldb_val(ac->search_res->message, "objectGUID"); if (parent_guid == NULL) { ldb_asprintf_errstring(ldb, "objectclass: Cannot add %s, parent does not have an objectGUID!", ldb_dn_get_linearized(msg->dn)); talloc_free(mem_ctx); return LDB_ERR_UNWILLING_TO_PERFORM; } ret = ldb_msg_add_steal_value(msg, "parentGUID", discard_const(parent_guid)); if (ret != LDB_SUCCESS) { ldb_asprintf_errstring(ldb, "objectclass: Cannot add %s, failed to add parentGUID", ldb_dn_get_linearized(msg->dn)); talloc_free(mem_ctx); return LDB_ERR_UNWILLING_TO_PERFORM; } } if (schema) { ret = fix_attributes(ldb, schema, msg); if (ret != LDB_SUCCESS) { talloc_free(mem_ctx); return ret; } /* 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); return LDB_ERR_OPERATIONS_ERROR; } ret = objectclass_sort(ac->module, schema, mem_ctx, objectclass_element, &sorted); if (ret != LDB_SUCCESS) { talloc_free(mem_ctx); return ret; } ldb_msg_remove_attr(msg, "objectClass"); ret = ldb_msg_add_empty(msg, "objectClass", 0, NULL); if (ret != LDB_SUCCESS) { 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); 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; } /* Last one is the critical one */ if (!current->next) { struct ldb_message_element *el; int32_t systemFlags = 0; const char *rdn_name = ldb_dn_get_rdn_name(msg->dn); if (current->objectclass->rDNAttID && 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 (ac->search_res && ac->search_res->message) { struct ldb_message_element *oc_el = ldb_msg_find_element(ac->search_res->message, "objectClass"); bool allowed_class = false; int i, j; for (i=0; allowed_class == false && oc_el && i < oc_el->num_values; i++) { const struct dsdb_class *sclass; sclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &oc_el->values[i]); if (!sclass) { /* We don't know this class? what is going on? */ continue; } if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) { for (j=0; sclass->systemPossibleInferiors && sclass->systemPossibleInferiors[j]; j++) { if (ldb_attr_cmp(current->objectclass->lDAPDisplayName, sclass->systemPossibleInferiors[j]) == 0) { allowed_class = true; break; } } } else { for (j=0; sclass->systemPossibleInferiors && sclass->systemPossibleInferiors[j]; j++) { if (ldb_attr_cmp(current->objectclass->lDAPDisplayName, sclass->systemPossibleInferiors[j]) == 0) { allowed_class = true; break; } } } } if (!allowed_class) { ldb_asprintf_errstring(ldb, "structural objectClass %s is not a valid child class for %s", current->objectclass->lDAPDisplayName, ldb_dn_get_linearized(ac->search_res->message->dn)); 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) { ldb_oom(ldb); talloc_free(mem_ctx); return LDB_ERR_OPERATIONS_ERROR; } ldb_msg_add_string(msg, "objectCategory", value); } if (!ldb_msg_find_element(msg, "showInAdvancedViewOnly") && (current->objectclass->defaultHidingValue == true)) { ldb_msg_add_string(msg, "showInAdvancedViewOnly", "TRUE"); } /* There are very special rules for systemFlags, see MS-ADTS 3.1.1.5.2.4 */ el = ldb_msg_find_element(msg, "systemFlags"); systemFlags = ldb_msg_find_attr_as_int(msg, "systemFlags", 0); if (el) { /* Only these flags may be set by a client, but we can't tell between a client and our provision at this point */ /* 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; } if (ldb_attr_cmp(current->objectclass->lDAPDisplayName, "server") == 0) { systemFlags |= (int32_t)(SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE | SYSTEM_FLAG_CONFIG_ALLOW_RENAME | SYSTEM_FLAG_CONFIG_ALLOW_LIMITED_MOVE); } else if (ldb_attr_cmp(current->objectclass->lDAPDisplayName, "site") == 0 || ldb_attr_cmp(current->objectclass->lDAPDisplayName, "serverContainer") == 0 || 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 || ldb_attr_cmp(current->objectclass->lDAPDisplayName, "siteLinkBridge") == 0 || ldb_attr_cmp(current->objectclass->lDAPDisplayName, "nTDSConnection") == 0) { systemFlags |= (int32_t)(SYSTEM_FLAG_CONFIG_ALLOW_RENAME); } /* TODO: If parent object is site or subnet, also add (SYSTEM_FLAG_CONFIG_ALLOW_RENAME) */ if (el || systemFlags != 0) { samdb_msg_add_int(ldb, msg, msg, "systemFlags", systemFlags); } } } } 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, oc_op_callback, ac->req); if (ret != LDB_SUCCESS) { return ret; } /* perform the add */ return ldb_next_request(ac->module, add_req); } static int oc_modify_callback(struct ldb_request *req, struct ldb_reply *ares); static int objectclass_do_mod(struct oc_context *ac); 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; const struct dsdb_schema *schema = dsdb_get_schema(ldb); struct class_list *sorted, *current; struct ldb_request *down_req; struct oc_context *ac; TALLOC_CTX *mem_ctx; char *value; int ret; ldb_debug(ldb, LDB_DEBUG_TRACE, "objectclass_modify\n"); /* do not manipulate our control entries */ if (ldb_dn_is_special(req->op.mod.message->dn)) { return ldb_next_request(module, req); } /* Without schema, there isn't much to do here */ if (!schema) { return ldb_next_request(module, req); } objectclass_element = ldb_msg_find_element(req->op.mod.message, "objectClass"); ac = oc_init_context(module, req); if (ac == NULL) { return LDB_ERR_OPERATIONS_ERROR; } /* If no part of this touches the objectClass, then we don't * need to make any changes. */ /* 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 = fix_attributes(ldb, schema, 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); } 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; } ret = fix_attributes(ldb, schema, msg); if (ret != LDB_SUCCESS) { talloc_free(mem_ctx); return ret; } ret = objectclass_sort(module, 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 */ 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; } ret = fix_attributes(ldb, schema, msg); if (ret != LDB_SUCCESS) { ldb_oom(ldb); return ret; } ret = ldb_build_mod_req(&down_req, ldb, ac, msg, req->controls, ac, oc_modify_callback, req); if (ret != LDB_SUCCESS) { return ret; } return ldb_next_request(module, down_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_request *search_req; 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); } if (ares->type != LDB_REPLY_DONE) { talloc_free(ares); return ldb_module_done(ac->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR); } talloc_free(ares); 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, ac->req); if (ret != LDB_SUCCESS) { return ldb_module_done(ac->req, NULL, NULL, ret); } ac->step_fn = objectclass_do_mod; ret = ldb_next_request(ac->module, search_req); if (ret != LDB_SUCCESS) { return ldb_module_done(ac->req, NULL, NULL, ret); } return LDB_SUCCESS; } static int objectclass_do_mod(struct oc_context *ac) { struct ldb_context *ldb; const struct dsdb_schema *schema; struct ldb_request *mod_req; char *value; struct ldb_message_element *objectclass_element; struct ldb_message *msg; TALLOC_CTX *mem_ctx; struct class_list *sorted, *current; int ret; ldb = ldb_module_get_ctx(ac->module); if (ac->search_res == NULL) { return LDB_ERR_OPERATIONS_ERROR; } schema = dsdb_get_schema(ldb); mem_ctx = talloc_new(ac); if (mem_ctx == NULL) { 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); 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, schema, mem_ctx, objectclass_element, &sorted); if (ret != LDB_SUCCESS) { return ret; } /* We must completely replace the existing objectClass entry. * We could do a constrained add/del, but we are meant to be * in a transaction... */ ret = ldb_msg_add_empty(msg, "objectClass", LDB_FLAG_MOD_REPLACE, NULL); if (ret != LDB_SUCCESS) { ldb_set_errstring(ldb, "objectclass: could not clear objectclass in modify msg"); 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); if (value == NULL) { ldb_oom(ldb); 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; } } ret = ldb_msg_sanity_check(ldb, msg); if (ret != LDB_SUCCESS) { talloc_free(mem_ctx); return ret; } ret = ldb_build_mod_req(&mod_req, ldb, ac, msg, ac->req->controls, 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); } static int objectclass_do_rename(struct oc_context *ac); static int objectclass_rename(struct ldb_module *module, struct ldb_request *req) { static const char * const attrs[] = { "objectGUID", NULL }; struct ldb_context *ldb; struct ldb_request *search_req; struct oc_context *ac; struct ldb_dn *parent_dn; int ret; ldb = ldb_module_get_ctx(module); ldb_debug(ldb, LDB_DEBUG_TRACE, "objectclass_rename\n"); if (ldb_dn_is_special(req->op.rename.newdn)) { /* do not manipulate our control entries */ return ldb_next_request(module, req); } /* Firstly ensure we are not trying to rename it to be a child of itself */ if ((ldb_dn_compare_base(req->op.rename.olddn, req->op.rename.newdn) == 0) && (ldb_dn_compare(req->op.rename.olddn, req->op.rename.newdn) != 0)) { ldb_asprintf_errstring(ldb, "Cannot rename %s to be a child of itself", ldb_dn_get_linearized(req->op.rename.olddn)); return LDB_ERR_UNWILLING_TO_PERFORM; } ac = oc_init_context(module, req); if (ac == NULL) { return LDB_ERR_OPERATIONS_ERROR; } parent_dn = ldb_dn_get_parent(ac, req->op.rename.newdn); if (parent_dn == NULL) { ldb_oom(ldb); return LDB_ERR_OPERATIONS_ERROR; } /* 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, 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); } /* called after the rename happens. We now need to fix the parentGUID of the object to be the objectGUID of the new parent */ static int objectclass_rename_callback(struct ldb_request *req, struct ldb_reply *ares) { struct ldb_context *ldb; struct oc_context *ac; const struct ldb_val *parent_guid; struct ldb_request *mod_req = NULL; int ret; struct ldb_message *msg; struct ldb_message_element *el = NULL; ac = talloc_get_type(req->context, struct oc_context); ldb = ldb_module_get_ctx(ac->module); /* make sure the rename succeeded */ 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); } talloc_free(ares); /* the ac->search_res should contain the new parents objectGUID */ parent_guid = ldb_msg_find_ldb_val(ac->search_res->message, "objectGUID"); if (parent_guid == NULL) { ldb_asprintf_errstring(ldb, "objectclass: Cannot rename %s, new parent does not have an objectGUID!", ldb_dn_get_linearized(ac->req->op.rename.newdn)); return LDB_ERR_UNWILLING_TO_PERFORM; } /* construct the modify message */ msg = ldb_msg_new(ac); if (msg == NULL) { ldb_oom(ldb); return LDB_ERR_OPERATIONS_ERROR; } msg->dn = ac->req->op.rename.newdn; ret = ldb_msg_add_value(msg, "parentGUID", parent_guid, &el); if (ret != LDB_SUCCESS) { return ret; } el->flags = LDB_FLAG_MOD_REPLACE; ret = ldb_build_mod_req(&mod_req, ldb, ac, msg, NULL, ac, oc_op_callback, req); return ldb_next_request(ac->module, mod_req); } static int objectclass_do_rename(struct oc_context *ac) { struct ldb_context *ldb; struct ldb_request *rename_req; struct ldb_dn *fixed_dn; int ret; ldb = ldb_module_get_ctx(ac->module); /* Check we have a valid parent */ if (ac->search_res == NULL) { ldb_asprintf_errstring(ldb, "objectclass: Cannot rename %s, parent does not exist!", ldb_dn_get_linearized(ac->req->op.rename.newdn)); return LDB_ERR_UNWILLING_TO_PERFORM; } /* Fix up the DN to be in the standard form, * taking particular care to match the parent DN */ ret = fix_dn(ac, ac->req->op.rename.newdn, ac->search_res->message->dn, &fixed_dn); if (ret != LDB_SUCCESS) { return ret; } /* TODO: Check this is a valid child to this parent, * by reading the allowedChildClasses and * allowedChildClasssesEffective attributes */ ret = ldb_build_rename_req(&rename_req, ldb, ac, ac->req->op.rename.olddn, fixed_dn, ac->req->controls, ac, objectclass_rename_callback, ac->req); if (ret != LDB_SUCCESS) { return ret; } /* perform the rename */ return ldb_next_request(ac->module, rename_req); } _PUBLIC_ const struct ldb_module_ops ldb_objectclass_module_ops = { .name = "objectclass", .add = objectclass_add, .modify = objectclass_modify, .rename = objectclass_rename, };