diff options
Diffstat (limited to 'source4/dsdb/samdb/ldb_modules/objectclass.c')
| -rw-r--r-- | source4/dsdb/samdb/ldb_modules/objectclass.c | 1207 |
1 files changed, 1207 insertions, 0 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/objectclass.c b/source4/dsdb/samdb/ldb_modules/objectclass.c new file mode 100644 index 0000000000..b048a8d8e1 --- /dev/null +++ b/source4/dsdb/samdb/ldb_modules/objectclass.c @@ -0,0 +1,1207 @@ +/* + ldb database library + + Copyright (C) Simo Sorce 2006 + Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2007 + + 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: 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/include/ldb.h" +#include "ldb/include/ldb_errors.h" +#include "ldb/include/ldb_private.h" +#include "dsdb/samdb/samdb.h" +#include "lib/util/dlinklist.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 oc_context { + + enum oc_step {OC_DO_REQ, OC_SEARCH_SELF, OC_DO_MOD, + OC_SEARCH_ADD_PARENT, OC_DO_ADD, + OC_SEARCH_RENAME_PARENT, OC_DO_RENAME} step; + + struct ldb_module *module; + struct ldb_request *orig_req; + + struct ldb_request *down_req; + + struct ldb_request *search_req; + struct ldb_reply *search_res; + + struct ldb_request *add_req; + struct ldb_request *mod_req; + struct ldb_request *rename_req; +}; + +struct class_list { + struct class_list *prev, *next; + const struct dsdb_class *objectclass; +}; + +static int objectclass_do_add(struct ldb_handle *h); + +static struct ldb_handle *oc_init_handle(struct ldb_request *req, struct ldb_module *module) +{ + struct oc_context *ac; + struct ldb_handle *h; + + h = talloc_zero(req, struct ldb_handle); + if (h == NULL) { + ldb_set_errstring(module->ldb, "Out of Memory"); + return NULL; + } + + h->module = module; + + ac = talloc_zero(h, struct oc_context); + if (ac == NULL) { + ldb_set_errstring(module->ldb, "Out of Memory"); + talloc_free(h); + return NULL; + } + + h->private_data = (void *)ac; + + h->state = LDB_ASYNC_INIT; + h->status = LDB_SUCCESS; + + ac->module = module; + ac->orig_req = req; + + return h; +} + +/* 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, + struct ldb_message *msg, /* so that when we create new elements, we put it on the right parent */ + TALLOC_CTX *mem_ctx, + struct ldb_message_element *objectclass_element, + struct class_list **sorted_out) +{ + int i; + int layer; + struct class_list *sorted = NULL, *parent_class = NULL, + *subclass = NULL, *unsorted = NULL, *current, *poss_subclass, *poss_parent, *new_parent; + /* 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_set_errstring(module->ldb, "objectclass: out of memory allocating objectclass list"); + talloc_free(mem_ctx); + return LDB_ERR_OPERATIONS_ERROR; + } + current->objectclass = dsdb_class_by_lDAPDisplayName(schema, (const char *)objectclass_element->values[i].data); + if (!current->objectclass) { + ldb_asprintf_errstring(module->ldb, "objectclass %s is not a valid objectClass in schema", (const char *)objectclass_element->values[i].data); + return LDB_ERR_OBJECT_CLASS_VIOLATION; + } + + /* 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(module->ldb, "objectclass %s is not a valid objectClass in objectClass chain", unsorted->objectclass->lDAPDisplayName); + return LDB_ERR_OBJECT_CLASS_VIOLATION; +} + +static DATA_BLOB *get_sd(struct ldb_module *module, TALLOC_CTX *mem_ctx, + const struct dsdb_class *objectclass) +{ + enum ndr_err_code ndr_err; + DATA_BLOB *linear_sd; + struct auth_session_info *session_info + = ldb_get_opaque(module->ldb, "sessionInfo"); + struct security_descriptor *sd; + struct dom_sid *domain_sid = samdb_domain_sid(module->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(module->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_context *ldb, void *context, struct ldb_reply *ares) +{ + struct oc_context *ac; + + ac = talloc_get_type(context, struct oc_context); + + /* we are interested only in the single reply (base search) we receive here */ + if (ares->type == LDB_REPLY_ENTRY) { + if (ac->search_res != NULL) { + ldb_set_errstring(ldb, "Too many results"); + talloc_free(ares); + return LDB_ERR_OPERATIONS_ERROR; + } + + ac->search_res = talloc_move(ac, &ares); + } else { + talloc_free(ares); + } + + return LDB_SUCCESS; +} + +/* 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); + if (!attribute) { + ldb_asprintf_errstring(ldb, "attribute %s is not a valid attribute in schema", msg->elements[i].name); + return LDB_ERR_UNDEFINED_ATTRIBUTE_TYPE; + } + msg->elements[i].name = attribute->lDAPDisplayName; + } + + return LDB_SUCCESS; +} + +static int objectclass_add(struct ldb_module *module, struct ldb_request *req) +{ + + static const char * const attrs[] = { NULL }; + + struct ldb_handle *h; + struct oc_context *ac; + struct ldb_dn *parent_dn; + int ret; + + ldb_debug(module->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); + } + + /* Need to object to this, but cn=rootdse doesn't hae an objectClass... */ + if (ldb_msg_find_element(req->op.add.message, + "objectClass") == NULL) { + return ldb_next_request(module, req); + } + + h = oc_init_handle(req, module); + if (!h) { + return LDB_ERR_OPERATIONS_ERROR; + } + ac = talloc_get_type(h->private_data, struct oc_context); + + /* return or own handle to deal with this call */ + req->handle = h; + + /* If there isn't a parent, just go on to the add processing */ + if (ldb_dn_get_comp_num(ac->orig_req->op.add.message->dn) == 1) { + return objectclass_do_add(h); + } + + parent_dn = ldb_dn_get_parent(ac, ac->orig_req->op.add.message->dn); + if (parent_dn == NULL) { + ldb_oom(module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + + ret = ldb_build_search_req(&ac->search_req, module->ldb, + ac, parent_dn, LDB_SCOPE_BASE, + "(objectClass=*)", + attrs, NULL, + ac, get_search_callback); + if (ret != LDB_SUCCESS) { + return ret; + } + + talloc_steal(ac->search_req, parent_dn); + + ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->search_req); + + ac->step = OC_SEARCH_ADD_PARENT; + + return ldb_next_request(ac->module, ac->search_req); +} + +static int objectclass_do_add(struct ldb_handle *h) +{ + const struct dsdb_schema *schema; + struct oc_context *ac; + struct ldb_message_element *objectclass_element; + struct ldb_message *msg; + TALLOC_CTX *mem_ctx; + struct class_list *sorted, *current; + int ret; + + ac = talloc_get_type(h->private_data, struct oc_context); + schema = dsdb_get_schema(ac->module->ldb); + + mem_ctx = talloc_new(ac); + if (mem_ctx == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + ac->add_req = talloc(ac, struct ldb_request); + if (ac->add_req == NULL) { + talloc_free(mem_ctx); + return LDB_ERR_OPERATIONS_ERROR; + } + + *ac->add_req = *ac->orig_req; + + ac->add_req->op.add.message = msg = ldb_msg_copy_shallow(ac->add_req, ac->orig_req->op.add.message); + + ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->add_req); + + /* Check we have a valid parent */ + if (ac->search_res == NULL) { + if (ldb_dn_compare(ldb_get_root_basedn(ac->module->ldb), ac->orig_req->op.add.message->dn) == 0) { + /* Allow the tree to be started */ + + /* but don't keep any error string, it's meaningless */ + ldb_set_errstring(ac->module->ldb, NULL); + } else { + ldb_asprintf_errstring(ac->module->ldb, "objectclass: Cannot add %s, parent does not exist!", + ldb_dn_get_linearized(ac->orig_req->op.add.message->dn)); + return LDB_ERR_UNWILLING_TO_PERFORM; + } + } else { + + /* Fix up the DN to be in the standard form, taking particular care to match the parent DN */ + ret = fix_dn(msg, + ac->orig_req->op.add.message->dn, + ac->search_res->message->dn, + &msg->dn); + + if (ret != LDB_SUCCESS) { + ldb_asprintf_errstring(ac->module->ldb, "Could not munge DN %s into normal form", + ldb_dn_get_linearized(ac->orig_req->op.add.message->dn)); + return ret; + } + + /* TODO: Check this is a valid child to this parent, + * by reading the allowedChildClasses and + * allowedChildClasssesEffective attributes */ + + } + + if (schema) { + ret = fix_attributes(ac->module->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, msg, 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) { + ret = ldb_msg_add_string(msg, "objectClass", current->objectclass->lDAPDisplayName); + if (ret != LDB_SUCCESS) { + ldb_set_errstring(ac->module->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; + if (!ldb_msg_find_element(msg, "objectCategory")) { + ldb_msg_add_string(msg, "objectCategory", + current->objectclass->defaultObjectCategory); + } + if (!ldb_msg_find_element(msg, "showInAdvancedViewOnly") && (current->objectclass->defaultHidingValue == true)) { + 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"); + + 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(ac->module->ldb, msg, msg, "systemFlags", systemFlags); + } + } + } + } + + talloc_free(mem_ctx); + ret = ldb_msg_sanity_check(ac->module->ldb, msg); + + + if (ret != LDB_SUCCESS) { + return ret; + } + + h->state = LDB_ASYNC_INIT; + h->status = LDB_SUCCESS; + + ac->step = OC_DO_ADD; + + /* perform the add */ + return ldb_next_request(ac->module, ac->add_req); +} + +static int objectclass_modify(struct ldb_module *module, struct ldb_request *req) +{ + struct ldb_message_element *objectclass_element; + struct ldb_message *msg; + const struct dsdb_schema *schema = dsdb_get_schema(module->ldb); + int ret; + + ldb_debug(module->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"); + + /* 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) { + struct ldb_request *down_req = talloc(req, struct ldb_request); + if (down_req == NULL) { + ldb_set_errstring(module->ldb, "Out of memory!"); + return LDB_ERR_OPERATIONS_ERROR; + } + + *down_req = *req; /* copy the request */ + + down_req->op.mod.message = msg = ldb_msg_copy_shallow(down_req, req->op.mod.message); + + if (down_req->op.mod.message == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + ret = fix_attributes(module->ldb, schema, msg); + if (ret != LDB_SUCCESS) { + return ret; + } + + /* go on with the call chain */ + ret = ldb_next_request(module, down_req); + + /* do not free down_req as the call results may be linked to it, + * it will be freed when the upper level request get freed */ + if (ret == LDB_SUCCESS) { + req->handle = down_req->handle; + } + return ret; + } + + 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: + { + struct ldb_request *down_req; + struct class_list *sorted, *current; + TALLOC_CTX *mem_ctx; + mem_ctx = talloc_new(req); + if (mem_ctx == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + /* prepare the first operation */ + down_req = talloc(req, struct ldb_request); + if (down_req == NULL) { + ldb_set_errstring(module->ldb, "Out of memory!"); + talloc_free(mem_ctx); + return LDB_ERR_OPERATIONS_ERROR; + } + + *down_req = *req; /* copy the request */ + + down_req->op.mod.message = msg = ldb_msg_copy_shallow(down_req, req->op.mod.message); + + if (down_req->op.mod.message == NULL) { + talloc_free(mem_ctx); + return LDB_ERR_OPERATIONS_ERROR; + } + + ret = fix_attributes(module->ldb, schema, msg); + if (ret != LDB_SUCCESS) { + talloc_free(mem_ctx); + return ret; + } + + ret = objectclass_sort(module, schema, msg, mem_ctx, objectclass_element, &sorted); + if (ret != LDB_SUCCESS) { + 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) { + ret = ldb_msg_add_string(msg, "objectClass", current->objectclass->lDAPDisplayName); + if (ret != LDB_SUCCESS) { + ldb_set_errstring(module->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(module->ldb, msg); + if (ret != LDB_SUCCESS) { + talloc_free(mem_ctx); + return ret; + } + + /* go on with the call chain */ + ret = ldb_next_request(module, down_req); + + /* do not free down_req as the call results may be linked to it, + * it will be freed when the upper level request get freed */ + if (ret == LDB_SUCCESS) { + req->handle = down_req->handle; + } + return ret; + } + } + + /* 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 + */ + { + struct ldb_handle *h; + struct oc_context *ac; + + h = oc_init_handle(req, module); + if (!h) { + return LDB_ERR_OPERATIONS_ERROR; + } + ac = talloc_get_type(h->private_data, struct oc_context); + + /* return or own handle to deal with this call */ + req->handle = h; + + /* prepare the first operation */ + ac->down_req = talloc(ac, struct ldb_request); + if (ac->down_req == NULL) { + ldb_oom(ac->module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + + *(ac->down_req) = *req; /* copy the request */ + + ac->down_req->op.mod.message = msg = ldb_msg_copy_shallow(ac->down_req, req->op.mod.message); + + if (ac->down_req->op.mod.message == NULL) { + ldb_oom(ac->module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + + ret = fix_attributes(ac->module->ldb, schema, msg); + if (ret != LDB_SUCCESS) { + ldb_oom(ac->module->ldb); + return ret; + } + + ac->down_req->context = NULL; + ac->down_req->callback = NULL; + ldb_set_timeout_from_prev_req(module->ldb, req, ac->down_req); + + ac->step = OC_DO_REQ; + + return ldb_next_request(module, ac->down_req); + } +} + +static int objectclass_search_self(struct ldb_handle *h) +{ + int ret; + struct oc_context *ac; + static const char * const attrs[] = { "objectClass", NULL }; + + ac = talloc_get_type(h->private_data, struct oc_context); + + ret = ldb_build_search_req(&ac->search_req, ac->module->ldb, + ac, ac->orig_req->op.mod.message->dn, LDB_SCOPE_BASE, + "(objectClass=*)", + attrs, NULL, + ac, get_search_callback); + + if (ret != LDB_SUCCESS) { + return ret; + } + + ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->search_req); + + ac->step = OC_SEARCH_SELF; + + return ldb_next_request(ac->module, ac->search_req); +} + +static int objectclass_do_mod(struct ldb_handle *h) { + + const struct dsdb_schema *schema; + struct oc_context *ac; + struct ldb_message_element *objectclass_element; + struct ldb_message *msg; + TALLOC_CTX *mem_ctx; + struct class_list *sorted, *current; + int ret; + + ac = talloc_get_type(h->private_data, struct oc_context); + schema = dsdb_get_schema(ac->module->ldb); + + mem_ctx = talloc_new(ac); + if (mem_ctx == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + ac->mod_req = talloc(ac, struct ldb_request); + if (ac->mod_req == NULL) { + talloc_free(mem_ctx); + return LDB_ERR_OPERATIONS_ERROR; + } + + ac->mod_req->operation = LDB_MODIFY; + ac->mod_req->controls = NULL; + ac->mod_req->context = ac; + ac->mod_req->callback = NULL; + ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->mod_req); + + /* use a new message structure */ + ac->mod_req->op.mod.message = msg = ldb_msg_new(ac->mod_req); + if (msg == NULL) { + ldb_set_errstring(ac->module->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->orig_req->op.mod.message->dn; + + ret = objectclass_sort(ac->module, schema, msg, 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(ac->module->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) { + ret = ldb_msg_add_string(msg, "objectClass", current->objectclass->lDAPDisplayName); + if (ret != LDB_SUCCESS) { + ldb_set_errstring(ac->module->ldb, "objectclass: could not re-add sorted objectclass to modify msg"); + talloc_free(mem_ctx); + return ret; + } + } + + ret = ldb_msg_sanity_check(ac->module->ldb, msg); + if (ret != LDB_SUCCESS) { + talloc_free(mem_ctx); + return ret; + } + + + h->state = LDB_ASYNC_INIT; + h->status = LDB_SUCCESS; + + ac->step = OC_DO_MOD; + + talloc_free(mem_ctx); + /* perform the search */ + return ldb_next_request(ac->module, ac->mod_req); +} + +static int objectclass_rename(struct ldb_module *module, struct ldb_request *req) +{ + + static const char * const attrs[] = { NULL }; + + struct ldb_handle *h; + struct oc_context *ac; + struct ldb_dn *parent_dn; + int ret; + + ldb_debug(module->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(module->ldb, "Cannot rename %s to be a child of itself", + ldb_dn_get_linearized(req->op.rename.olddn)); + return LDB_ERR_UNWILLING_TO_PERFORM; + } + + h = oc_init_handle(req, module); + if (!h) { + return LDB_ERR_OPERATIONS_ERROR; + } + ac = talloc_get_type(h->private_data, struct oc_context); + + /* return or own handle to deal with this call */ + req->handle = h; + + parent_dn = ldb_dn_get_parent(ac, ac->orig_req->op.rename.newdn); + if (parent_dn == NULL) { + ldb_oom(module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + ret = ldb_build_search_req(&ac->search_req, module->ldb, + ac, parent_dn, LDB_SCOPE_BASE, + "(objectClass=*)", + attrs, NULL, + ac, get_search_callback); + if (ret != LDB_SUCCESS) { + return ret; + } + talloc_steal(ac->search_req, parent_dn); + ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->search_req); + + ac->step = OC_SEARCH_RENAME_PARENT; + + return ldb_next_request(ac->module, ac->search_req); +} + +static int objectclass_do_rename(struct ldb_handle *h) +{ + struct oc_context *ac; + int ret; + + ac = talloc_get_type(h->private_data, struct oc_context); + + ac->rename_req = talloc(ac, struct ldb_request); + if (ac->rename_req == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + *ac->rename_req = *ac->orig_req; + + ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->rename_req); + + /* Check we have a valid parent */ + if (ac->search_res == NULL) { + ldb_asprintf_errstring(ac->module->ldb, "objectclass: Cannot rename %s, parent does not exist!", + ldb_dn_get_linearized(ac->orig_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->rename_req, + ac->orig_req->op.rename.newdn, + ac->search_res->message->dn, + &ac->rename_req->op.rename.newdn); + + if (ret != LDB_SUCCESS) { + return ret; + } + + /* TODO: Check this is a valid child to this parent, + * by reading the allowedChildClasses and + * allowedChildClasssesEffective attributes */ + + h->state = LDB_ASYNC_INIT; + h->status = LDB_SUCCESS; + + ac->step = OC_DO_RENAME; + + /* perform the rename */ + return ldb_next_request(ac->module, ac->rename_req); +} + +static int oc_wait(struct ldb_handle *handle) { + struct oc_context *ac; + int ret; + + if (!handle || !handle->private_data) { + return LDB_ERR_OPERATIONS_ERROR; + } + + if (handle->state == LDB_ASYNC_DONE) { + return handle->status; + } + + handle->state = LDB_ASYNC_PENDING; + handle->status = LDB_SUCCESS; + + ac = talloc_get_type(handle->private_data, struct oc_context); + + switch (ac->step) { + case OC_DO_REQ: + ret = ldb_wait(ac->down_req->handle, LDB_WAIT_NONE); + + if (ret != LDB_SUCCESS) { + handle->status = ret; + goto done; + } + if (ac->down_req->handle->status != LDB_SUCCESS) { + handle->status = ac->down_req->handle->status; + goto done; + } + + if (ac->down_req->handle->state != LDB_ASYNC_DONE) { + return LDB_SUCCESS; + } + + /* mods done, go on */ + return objectclass_search_self(handle); + + case OC_SEARCH_SELF: + ret = ldb_wait(ac->search_req->handle, LDB_WAIT_NONE); + + if (ret != LDB_SUCCESS) { + handle->status = ret; + goto done; + } + if (ac->search_req->handle->status != LDB_SUCCESS) { + handle->status = ac->search_req->handle->status; + goto done; + } + + if (ac->search_req->handle->state != LDB_ASYNC_DONE) { + return LDB_SUCCESS; + } + + /* self search done, go on */ + return objectclass_do_mod(handle); + + case OC_DO_MOD: + ret = ldb_wait(ac->mod_req->handle, LDB_WAIT_NONE); + + if (ret != LDB_SUCCESS) { + handle->status = ret; + goto done; + } + if (ac->mod_req->handle->status != LDB_SUCCESS) { + handle->status = ac->mod_req->handle->status; + goto done; + } + + if (ac->mod_req->handle->state != LDB_ASYNC_DONE) { + return LDB_SUCCESS; + } + + break; + + case OC_SEARCH_ADD_PARENT: + ret = ldb_wait(ac->search_req->handle, LDB_WAIT_NONE); + + if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) { + handle->status = ret; + goto done; + } + if (ac->search_req->handle->status != LDB_SUCCESS + && ac->search_req->handle->status != LDB_ERR_NO_SUCH_OBJECT) { + handle->status = ac->search_req->handle->status; + goto done; + } + + if (ac->search_req->handle->state != LDB_ASYNC_DONE) { + return LDB_SUCCESS; + } + + /* parent search done, go on */ + return objectclass_do_add(handle); + + case OC_DO_ADD: + ret = ldb_wait(ac->add_req->handle, LDB_WAIT_NONE); + + if (ret != LDB_SUCCESS) { + handle->status = ret; + goto done; + } + if (ac->add_req->handle->status != LDB_SUCCESS) { + handle->status = ac->add_req->handle->status; + goto done; + } + + if (ac->add_req->handle->state != LDB_ASYNC_DONE) { + return LDB_SUCCESS; + } + + break; + + case OC_SEARCH_RENAME_PARENT: + ret = ldb_wait(ac->search_req->handle, LDB_WAIT_NONE); + + if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) { + handle->status = ret; + goto done; + } + if (ac->search_req->handle->status != LDB_SUCCESS && ac->search_req->handle->status != LDB_ERR_NO_SUCH_OBJECT) { + handle->status = ac->search_req->handle->status; + goto done; + } + + if (ac->search_req->handle->state != LDB_ASYNC_DONE) { + return LDB_SUCCESS; + } + + /* parent search done, go on */ + return objectclass_do_rename(handle); + + case OC_DO_RENAME: + ret = ldb_wait(ac->rename_req->handle, LDB_WAIT_NONE); + + if (ret != LDB_SUCCESS) { + handle->status = ret; + goto done; + } + if (ac->rename_req->handle->status != LDB_SUCCESS) { + handle->status = ac->rename_req->handle->status; + goto done; + } + + if (ac->rename_req->handle->state != LDB_ASYNC_DONE) { + return LDB_SUCCESS; + } + + break; + + default: + ret = LDB_ERR_OPERATIONS_ERROR; + goto done; + } + + ret = LDB_SUCCESS; + +done: + handle->state = LDB_ASYNC_DONE; + return ret; +} + +static int oc_wait_all(struct ldb_handle *handle) { + + int ret; + + while (handle->state != LDB_ASYNC_DONE) { + ret = oc_wait(handle); + if (ret != LDB_SUCCESS) { + return ret; + } + } + + return handle->status; +} + +static int objectclass_wait(struct ldb_handle *handle, enum ldb_wait_type type) +{ + if (type == LDB_WAIT_ALL) { + return oc_wait_all(handle); + } else { + return oc_wait(handle); + } +} + +_PUBLIC_ const struct ldb_module_ops ldb_objectclass_module_ops = { + .name = "objectclass", + .add = objectclass_add, + .modify = objectclass_modify, + .rename = objectclass_rename, + .wait = objectclass_wait +}; 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