/* ldb database library Copyright (C) Simo Sorce 2006-2008 Copyright (C) Andrew Bartlett 2005-2007 Copyright (C) Nadezhda Ivanova 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: DS Security descriptor module * * Description: * - Calculate the security descriptor of a newly created object * - Perform sd recalculation on a move operation * - Handle sd modification invariants * * Author: Nadezhda Ivanova */ #include "includes.h" #include #include "util/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 "dsdb/samdb/ldb_modules/schema.h" #include "auth/auth.h" #include "param/param.h" #include "util.h" struct descriptor_data { int _dummy; }; struct descriptor_context { struct ldb_module *module; struct ldb_request *req; struct ldb_message *msg; struct ldb_reply *search_res; struct ldb_reply *search_oc_res; struct ldb_val *parentsd_val; struct ldb_message_element *sd_element; struct ldb_val *sd_val; int (*step_fn)(struct descriptor_context *); }; struct dom_sid *get_default_ag(TALLOC_CTX *mem_ctx, struct ldb_dn *dn, struct security_token *token, struct ldb_context *ldb) { TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx); const struct dom_sid *domain_sid = samdb_domain_sid(ldb); struct dom_sid *da_sid = dom_sid_add_rid(tmp_ctx, domain_sid, DOMAIN_RID_ADMINS); struct dom_sid *ea_sid = dom_sid_add_rid(tmp_ctx, domain_sid, DOMAIN_RID_ENTERPRISE_ADMINS); struct dom_sid *sa_sid = dom_sid_add_rid(tmp_ctx, domain_sid, DOMAIN_RID_SCHEMA_ADMINS); struct dom_sid *dag_sid; struct ldb_dn *nc_root; int ret; ret = dsdb_find_nc_root(ldb, tmp_ctx, dn, &nc_root); if (ret != LDB_SUCCESS) { talloc_free(tmp_ctx); return NULL; } if (ldb_dn_compare(nc_root, ldb_get_schema_basedn(ldb)) == 0) { if (security_token_has_sid(token, sa_sid)) dag_sid = dom_sid_dup(mem_ctx, sa_sid); else if (security_token_has_sid(token, ea_sid)) dag_sid = dom_sid_dup(mem_ctx, ea_sid); else if (security_token_has_sid(token, da_sid)) dag_sid = dom_sid_dup(mem_ctx, da_sid); else dag_sid = NULL; } else if (ldb_dn_compare(nc_root, ldb_get_config_basedn(ldb)) == 0) { if (security_token_has_sid(token, ea_sid)) dag_sid = dom_sid_dup(mem_ctx, ea_sid); else if (security_token_has_sid(token, da_sid)) dag_sid = dom_sid_dup(mem_ctx, da_sid); else dag_sid = NULL; } else if (ldb_dn_compare(nc_root, ldb_get_default_basedn(ldb)) == 0) { if (security_token_has_sid(token, da_sid)) dag_sid = dom_sid_dup(mem_ctx, da_sid); else if (security_token_has_sid(token, ea_sid)) dag_sid = dom_sid_dup(mem_ctx, ea_sid); else dag_sid = NULL; } else { dag_sid = NULL; } talloc_free(tmp_ctx); return dag_sid; } static struct security_descriptor *get_sd_unpacked(struct ldb_module *module, TALLOC_CTX *mem_ctx, const struct dsdb_class *objectclass) { struct ldb_context *ldb = ldb_module_get_ctx(module); 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); return sd; } static struct dom_sid *get_default_group(TALLOC_CTX *mem_ctx, struct ldb_context *ldb, struct dom_sid *dag) { if (dsdb_functional_level(ldb) >= DS_DOMAIN_FUNCTION_2008) { return dag; } return NULL; } static struct security_descriptor *descr_handle_sd_flags(TALLOC_CTX *mem_ctx, struct security_descriptor *new_sd, struct security_descriptor *old_sd, uint32_t sd_flags) { struct security_descriptor *final_sd; /* if there is no control or control == 0 modify everything */ if (!sd_flags) { return new_sd; } final_sd = talloc_zero(mem_ctx, struct security_descriptor); final_sd->revision = SECURITY_DESCRIPTOR_REVISION_1; final_sd->type = SEC_DESC_SELF_RELATIVE; if (sd_flags & (SECINFO_OWNER)) { final_sd->owner_sid = talloc_memdup(mem_ctx, new_sd->owner_sid, sizeof(struct dom_sid)); final_sd->type |= new_sd->type & SEC_DESC_OWNER_DEFAULTED; } else if (old_sd) { final_sd->owner_sid = talloc_memdup(mem_ctx, old_sd->owner_sid, sizeof(struct dom_sid)); final_sd->type |= old_sd->type & SEC_DESC_OWNER_DEFAULTED; } if (sd_flags & (SECINFO_GROUP)) { final_sd->group_sid = talloc_memdup(mem_ctx, new_sd->group_sid, sizeof(struct dom_sid)); final_sd->type |= new_sd->type & SEC_DESC_GROUP_DEFAULTED; } else if (old_sd) { final_sd->group_sid = talloc_memdup(mem_ctx, old_sd->group_sid, sizeof(struct dom_sid)); final_sd->type |= old_sd->type & SEC_DESC_GROUP_DEFAULTED; } if (sd_flags & (SECINFO_SACL)) { final_sd->sacl = security_acl_dup(mem_ctx,new_sd->sacl); final_sd->type |= new_sd->type & (SEC_DESC_SACL_PRESENT | SEC_DESC_SACL_DEFAULTED|SEC_DESC_SACL_AUTO_INHERIT_REQ | SEC_DESC_SACL_AUTO_INHERITED|SEC_DESC_SACL_PROTECTED | SEC_DESC_SERVER_SECURITY); } else if (old_sd && old_sd->sacl) { final_sd->sacl = security_acl_dup(mem_ctx,old_sd->sacl); final_sd->type |= old_sd->type & (SEC_DESC_SACL_PRESENT | SEC_DESC_SACL_DEFAULTED|SEC_DESC_SACL_AUTO_INHERIT_REQ | SEC_DESC_SACL_AUTO_INHERITED|SEC_DESC_SACL_PROTECTED | SEC_DESC_SERVER_SECURITY); } if (sd_flags & (SECINFO_DACL)) { final_sd->dacl = security_acl_dup(mem_ctx,new_sd->dacl); final_sd->type |= new_sd->type & (SEC_DESC_DACL_PRESENT | SEC_DESC_DACL_DEFAULTED|SEC_DESC_DACL_AUTO_INHERIT_REQ | SEC_DESC_DACL_AUTO_INHERITED|SEC_DESC_DACL_PROTECTED | SEC_DESC_DACL_TRUSTED); } else if (old_sd && old_sd->dacl) { final_sd->dacl = security_acl_dup(mem_ctx,old_sd->dacl); final_sd->type |= old_sd->type & (SEC_DESC_DACL_PRESENT | SEC_DESC_DACL_DEFAULTED|SEC_DESC_DACL_AUTO_INHERIT_REQ | SEC_DESC_DACL_AUTO_INHERITED|SEC_DESC_DACL_PROTECTED | SEC_DESC_DACL_TRUSTED); } /* not so sure about this */ final_sd->type |= new_sd->type & SEC_DESC_RM_CONTROL_VALID; return final_sd; } static DATA_BLOB *get_new_descriptor(struct ldb_module *module, struct ldb_dn *dn, TALLOC_CTX *mem_ctx, const struct dsdb_class *objectclass, const struct ldb_val *parent, struct ldb_val *object, struct ldb_val *old_sd, uint32_t sd_flags) { struct security_descriptor *user_descriptor = NULL, *parent_descriptor = NULL; struct security_descriptor *old_descriptor = NULL; struct security_descriptor *new_sd, *final_sd; DATA_BLOB *linear_sd; enum ndr_err_code ndr_err; struct ldb_context *ldb = ldb_module_get_ctx(module); struct auth_session_info *session_info = ldb_get_opaque(ldb, "sessionInfo"); const struct dom_sid *domain_sid = samdb_domain_sid(ldb); char *sddl_sd; struct dom_sid *default_owner; struct dom_sid *default_group; if (object) { user_descriptor = talloc(mem_ctx, struct security_descriptor); if (!user_descriptor) { return NULL; } ndr_err = ndr_pull_struct_blob(object, user_descriptor, user_descriptor, (ndr_pull_flags_fn_t)ndr_pull_security_descriptor); if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { talloc_free(user_descriptor); return NULL; } } else { user_descriptor = get_sd_unpacked(module, mem_ctx, objectclass); } if (old_sd) { old_descriptor = talloc(mem_ctx, struct security_descriptor); if (!old_descriptor) { return NULL; } ndr_err = ndr_pull_struct_blob(old_sd, old_descriptor, old_descriptor, (ndr_pull_flags_fn_t)ndr_pull_security_descriptor); if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { talloc_free(old_descriptor); return NULL; } } if (parent) { parent_descriptor = talloc(mem_ctx, struct security_descriptor); if (!parent_descriptor) { return NULL; } ndr_err = ndr_pull_struct_blob(parent, parent_descriptor, parent_descriptor, (ndr_pull_flags_fn_t)ndr_pull_security_descriptor); if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { talloc_free(parent_descriptor); return NULL; } } default_owner = get_default_ag(mem_ctx, dn, session_info->security_token, ldb); default_group = get_default_group(mem_ctx, ldb, default_owner); new_sd = create_security_descriptor(mem_ctx, parent_descriptor, user_descriptor, true, NULL, SEC_DACL_AUTO_INHERIT|SEC_SACL_AUTO_INHERIT, session_info->security_token, default_owner, default_group, map_generic_rights_ds); if (!new_sd) { return NULL; } final_sd = descr_handle_sd_flags(mem_ctx, new_sd, old_descriptor, sd_flags); if (!final_sd) { return NULL; } if (final_sd->dacl) { final_sd->dacl->revision = SECURITY_ACL_REVISION_ADS; } if (final_sd->sacl) { final_sd->sacl->revision = SECURITY_ACL_REVISION_ADS; } sddl_sd = sddl_encode(mem_ctx, final_sd, domain_sid); DEBUG(10, ("Object %s created with desriptor %s\n\n", ldb_dn_get_linearized(dn), sddl_sd)); linear_sd = talloc(mem_ctx, DATA_BLOB); if (!linear_sd) { return NULL; } ndr_err = ndr_push_struct_blob(linear_sd, mem_ctx, final_sd, (ndr_push_flags_fn_t)ndr_push_security_descriptor); if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { return NULL; } return linear_sd; } static DATA_BLOB *descr_get_descriptor_to_show(struct ldb_module *module, TALLOC_CTX *mem_ctx, struct ldb_val *sd, uint32_t sd_flags) { struct security_descriptor *old_sd, *final_sd; DATA_BLOB *linear_sd; enum ndr_err_code ndr_err; old_sd = talloc(mem_ctx, struct security_descriptor); if (!old_sd) { return NULL; } ndr_err = ndr_pull_struct_blob(sd, old_sd, old_sd, (ndr_pull_flags_fn_t)ndr_pull_security_descriptor); if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { talloc_free(old_sd); return NULL; } final_sd = descr_handle_sd_flags(mem_ctx, old_sd, NULL, sd_flags); if (!final_sd) { return NULL; } linear_sd = talloc(mem_ctx, DATA_BLOB); if (!linear_sd) { return NULL; } ndr_err = ndr_push_struct_blob(linear_sd, mem_ctx, final_sd, (ndr_push_flags_fn_t)ndr_push_security_descriptor); if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { return NULL; } return linear_sd; } static struct descriptor_context *descriptor_init_context(struct ldb_module *module, struct ldb_request *req) { struct ldb_context *ldb; struct descriptor_context *ac; ldb = ldb_module_get_ctx(module); ac = talloc_zero(req, struct descriptor_context); if (ac == NULL) { ldb_set_errstring(ldb, "Out of Memory"); return NULL; } ac->module = module; ac->req = req; return ac; } static int get_search_callback(struct ldb_request *req, struct ldb_reply *ares) { struct ldb_context *ldb; struct descriptor_context *ac; int ret; ac = talloc_get_type(req->context, struct descriptor_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 get_search_oc_callback(struct ldb_request *req, struct ldb_reply *ares) { struct ldb_context *ldb; struct descriptor_context *ac; int ret; ac = talloc_get_type(req->context, struct descriptor_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_oc_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_oc_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 descriptor_search_callback(struct ldb_request *req, struct ldb_reply *ares) { struct descriptor_context *ac; struct ldb_control *sd_control; struct ldb_val *sd_val = NULL; struct ldb_message_element *sd_el; DATA_BLOB *show_sd; int ret; uint32_t sd_flags = 0; ac = talloc_get_type(req->context, struct descriptor_context); if (!ares) { ret = LDB_ERR_OPERATIONS_ERROR; goto fail; } if (ares->error != LDB_SUCCESS) { return ldb_module_done(ac->req, ares->controls, ares->response, ares->error); } sd_control = ldb_request_get_control(ac->req, LDB_CONTROL_SD_FLAGS_OID); if (sd_control) { struct ldb_sd_flags_control *sdctr = (struct ldb_sd_flags_control *)sd_control->data; sd_flags = sdctr->secinfo_flags; /* we only care for the last 4 bits */ sd_flags = sd_flags & 0x0000000F; if (sd_flags == 0) { /* MS-ADTS 3.1.1.3.4.1.11 says that no bits equals all 4 bits */ sd_flags = 0xF; } } switch (ares->type) { case LDB_REPLY_ENTRY: if (sd_flags != 0) { sd_el = ldb_msg_find_element(ares->message, "nTSecurityDescriptor"); if (sd_el) { sd_val = sd_el->values; } } if (sd_val) { show_sd = descr_get_descriptor_to_show(ac->module, ac->req, sd_val, sd_flags); if (!show_sd) { ret = LDB_ERR_OPERATIONS_ERROR; goto fail; } ldb_msg_remove_attr(ares->message, "nTSecurityDescriptor"); ret = ldb_msg_add_steal_value(ares->message, "nTSecurityDescriptor", show_sd); if (ret != LDB_SUCCESS) { goto fail; } } return ldb_module_send_entry(ac->req, ares->message, ares->controls); case LDB_REPLY_REFERRAL: return ldb_module_send_referral(ac->req, ares->referral); case LDB_REPLY_DONE: return ldb_module_done(ac->req, ares->controls, ares->response, ares->error); } fail: talloc_free(ares); return ldb_module_done(ac->req, NULL, NULL, ret); } static int descriptor_do_mod(struct descriptor_context *ac) { struct ldb_context *ldb; const struct dsdb_schema *schema; struct ldb_request *mod_req; struct ldb_message_element *objectclass_element, *oldsd_el; struct ldb_val *oldsd_val = NULL; int ret; DATA_BLOB *sd; const struct dsdb_class *objectclass; struct ldb_control *sd_control; struct ldb_control *sd_control2; uint32_t sd_flags = 0; ldb = ldb_module_get_ctx(ac->module); schema = dsdb_get_schema(ldb, ac); objectclass_element = ldb_msg_find_element(ac->search_oc_res->message, "objectClass"); if (objectclass_element == NULL) { return ldb_operr(ldb); } objectclass = get_last_structural_class(schema, objectclass_element, ac->req); if (objectclass == NULL) { return ldb_operr(ldb); } sd_control = ldb_request_get_control(ac->req, LDB_CONTROL_SD_FLAGS_OID); sd_control2 = ldb_request_get_control(ac->req, LDB_CONTROL_RECALCULATE_SD_OID); if (sd_control) { struct ldb_sd_flags_control *sdctr = (struct ldb_sd_flags_control *)sd_control->data; sd_flags = sdctr->secinfo_flags; /* we only care for the last 4 bits */ sd_flags = sd_flags & 0x0000000F; } if (sd_flags != 0) { oldsd_el = ldb_msg_find_element(ac->search_oc_res->message, "nTSecurityDescriptor"); if (oldsd_el) { oldsd_val = oldsd_el->values; } } sd = get_new_descriptor(ac->module, ac->msg->dn, ac, objectclass, ac->parentsd_val, ac->sd_val, oldsd_val, sd_flags); if (sd != NULL) { if (ac->sd_val != NULL) { ac->sd_element->values[0] = *sd; } else if (sd_control2 != NULL) { /* In this branch we really do force the recalculation * of the SD */ ldb_msg_remove_attr(ac->msg, "nTSecurityDescriptor"); ret = ldb_msg_add_steal_value(ac->msg, "nTSecurityDescriptor", sd); if (ret != LDB_SUCCESS) { return ret; } ac->sd_element = ldb_msg_find_element(ac->msg, "nTSecurityDescriptor"); ac->sd_element->flags = LDB_FLAG_MOD_REPLACE; } } /* mark the controls as non-critical since we've handled them */ if (sd_control != NULL) { sd_control->critical = 0; } if (sd_control2 != NULL) { sd_control2->critical = 0; } ret = ldb_build_mod_req(&mod_req, ldb, ac, ac->msg, ac->req->controls, ac->req, dsdb_next_callback, ac->req); LDB_REQ_SET_LOCATION(mod_req); if (ret != LDB_SUCCESS) { return ret; } return ldb_next_request(ac->module, mod_req); } static int descriptor_do_add(struct descriptor_context *ac) { struct ldb_context *ldb; const struct dsdb_schema *schema; struct ldb_request *add_req; struct ldb_message_element *objectclass_element; int ret; DATA_BLOB *sd; const struct dsdb_class *objectclass; static const char *const attrs[] = { "objectClass", "nTSecurityDescriptor", NULL }; struct ldb_request *search_req; ldb = ldb_module_get_ctx(ac->module); schema = dsdb_get_schema(ldb, ac); switch (ac->req->operation) { case LDB_ADD: ac->msg = ldb_msg_copy_shallow(ac, ac->req->op.add.message); if (ac->msg == NULL) { return ldb_module_oom(ac->module); } objectclass_element = ldb_msg_find_element(ac->msg, "objectClass"); if (objectclass_element == NULL) { return ldb_operr(ldb); } objectclass = get_last_structural_class(schema, objectclass_element, ac->req); if (objectclass == NULL) { return ldb_operr(ldb); } break; case LDB_MODIFY: ac->msg = ldb_msg_copy_shallow(ac, ac->req->op.mod.message); if (ac->msg == NULL) { return ldb_module_oom(ac->module); } break; default: return ldb_operr(ldb); } /* Check if there is a valid security descriptor provided */ ac->sd_element = dsdb_get_single_valued_attr(ac->msg, "nTSecurityDescriptor", ac->req->operation); if ((ac->sd_element != NULL) && (ac->sd_element->num_values == 1)) { ac->sd_val = talloc_memdup(ac, &ac->sd_element->values[0], sizeof(struct ldb_val)); } /* If we do have a parent, then please fetch it's security descriptor. * But have in mind: NCs don't have any parents! That means * "CN=Configuration,DC=example,DC=com" has no parent * "DC=example,DC=com" since this is located under another NC! */ if (ac->search_res != NULL) { struct ldb_message_element *parent_element = NULL; struct ldb_dn *nc_root; ret = dsdb_find_nc_root(ldb, ac, ac->msg->dn, &nc_root); if (ret != LDB_SUCCESS) { return ret; } if (ldb_dn_compare(ac->msg->dn, nc_root) != 0) { /* we aren't any NC */ parent_element = ldb_msg_find_element(ac->search_res->message, "nTSecurityDescriptor"); if (parent_element != NULL) { ac->parentsd_val = talloc_memdup(ac, &parent_element->values[0], sizeof(struct ldb_val)); } } } if (ac->req->operation == LDB_ADD) { /* Get the parent descriptor and the one provided. If not * provided, get the default. Convert it to a security * descriptor and calculate the permissions. */ sd = get_new_descriptor(ac->module, ac->msg->dn, ac, objectclass, ac->parentsd_val, ac->sd_val, NULL, 0); if (sd != NULL) { if (ac->sd_val != NULL) { ac->sd_element->values[0] = *sd; } else if (ac->sd_element == NULL) { ret = ldb_msg_add_steal_value(ac->msg, "nTSecurityDescriptor", sd); if (ret != LDB_SUCCESS) { return ret; } } } ret = ldb_build_add_req(&add_req, ldb, ac, ac->msg, ac->req->controls, ac->req, dsdb_next_callback, ac->req); LDB_REQ_SET_LOCATION(add_req); if (ret != LDB_SUCCESS) { return ret; } return ldb_next_request(ac->module, add_req); } else { ret = ldb_build_search_req(&search_req, ldb, ac, ac->msg->dn, LDB_SCOPE_BASE, "(objectClass=*)", attrs, NULL, ac, get_search_oc_callback, ac->req); LDB_REQ_SET_LOCATION(search_req); if (ret != LDB_SUCCESS) { return ret; } ac->step_fn = descriptor_do_mod; return ldb_next_request(ac->module, search_req); } } static int descriptor_change(struct ldb_module *module, struct ldb_request *req) { struct ldb_context *ldb; struct ldb_control *sd_control; struct ldb_request *search_req; struct descriptor_context *ac; struct ldb_dn *parent_dn, *dn; struct ldb_message_element *sd_element; int ret; static const char * const descr_attrs[] = { "nTSecurityDescriptor", NULL }; ldb = ldb_module_get_ctx(module); switch (req->operation) { case LDB_ADD: dn = req->op.add.message->dn; break; case LDB_MODIFY: dn = req->op.mod.message->dn; sd_element = ldb_msg_find_element(req->op.mod.message, "nTSecurityDescriptor"); /* This control forces the recalculation of the SD also when * no modification is performed. */ sd_control = ldb_request_get_control(req, LDB_CONTROL_RECALCULATE_SD_OID); if (!sd_element && !sd_control) { return ldb_next_request(module, req); } break; default: return ldb_operr(ldb); } ldb_debug(ldb, LDB_DEBUG_TRACE,"descriptor_change: %s\n", ldb_dn_get_linearized(dn)); /* do not manipulate our control entries */ if (ldb_dn_is_special(dn)) { return ldb_next_request(module, req); } ac = descriptor_init_context(module, req); if (ac == NULL) { return ldb_operr(ldb); } /* If there isn't a parent, just go on to the add processing */ if (ldb_dn_get_comp_num(dn) == 1) { return descriptor_do_add(ac); } /* get copy of parent DN */ parent_dn = ldb_dn_get_parent(ac, dn); if (parent_dn == NULL) { return ldb_oom(ldb); } ret = ldb_build_search_req(&search_req, ldb, ac, parent_dn, LDB_SCOPE_BASE, "(objectClass=*)", descr_attrs, NULL, ac, get_search_callback, req); LDB_REQ_SET_LOCATION(search_req); if (ret != LDB_SUCCESS) { return ret; } talloc_steal(search_req, parent_dn); ac->step_fn = descriptor_do_add; return ldb_next_request(ac->module, search_req); } static int descriptor_search(struct ldb_module *module, struct ldb_request *req) { int ret; struct ldb_context *ldb; struct ldb_control *sd_control; struct ldb_request *down_req; struct descriptor_context *ac; sd_control = ldb_request_get_control(req, LDB_CONTROL_SD_FLAGS_OID); if (!sd_control) { return ldb_next_request(module, req); } ldb = ldb_module_get_ctx(module); ac = descriptor_init_context(module, req); if (ac == NULL) { return ldb_operr(ldb); } ret = ldb_build_search_req_ex(&down_req, ldb, ac, req->op.search.base, req->op.search.scope, req->op.search.tree, req->op.search.attrs, req->controls, ac, descriptor_search_callback, ac->req); LDB_REQ_SET_LOCATION(down_req); if (ret != LDB_SUCCESS) { return ret; } /* mark it as handled */ if (sd_control) { sd_control->critical = 0; } return ldb_next_request(ac->module, down_req); } /* TODO */ static int descriptor_rename(struct ldb_module *module, struct ldb_request *req) { struct ldb_context *ldb = ldb_module_get_ctx(module); ldb_debug(ldb, LDB_DEBUG_TRACE,"descriptor_rename: %s\n", ldb_dn_get_linearized(req->op.rename.olddn)); /* do not manipulate our control entries */ if (ldb_dn_is_special(req->op.rename.olddn)) { return ldb_next_request(module, req); } return ldb_next_request(module, req); } static int descriptor_init(struct ldb_module *module) { int ret = ldb_mod_register_control(module, LDB_CONTROL_SD_FLAGS_OID); struct ldb_context *ldb = ldb_module_get_ctx(module); if (ret != LDB_SUCCESS) { ldb_debug(ldb, LDB_DEBUG_ERROR, "descriptor: Unable to register control with rootdse!\n"); return ldb_operr(ldb); } return ldb_next_init(module); } static const struct ldb_module_ops ldb_descriptor_module_ops = { .name = "descriptor", .search = descriptor_search, .add = descriptor_change, .modify = descriptor_change, .rename = descriptor_rename, .init_context = descriptor_init }; int ldb_descriptor_module_init(const char *version) { LDB_MODULE_CHECK_VERSION(version); return ldb_register_module(&ldb_descriptor_module_ops); }