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/*
ldb database library
Copyright (C) Amdrew Bartlett <abartlet@samba.org> 2007-2008
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: ldb normalisation module
*
* Description: module to ensure all DNs and attribute names are normalised
*
* 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"
/* 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
*/
struct norm_context {
struct ldb_module *module;
struct ldb_request *req;
const struct dsdb_schema *schema;
};
static int fix_dn(struct ldb_dn *dn)
{
int i, ret;
char *upper_rdn_attr;
for (i=0; i < ldb_dn_get_comp_num(dn); i++) {
/* We need the attribute name in upper case */
upper_rdn_attr = strupper_talloc(dn,
ldb_dn_get_component_name(dn, i));
if (!upper_rdn_attr) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* And replace it with CN=foo (we need the attribute in upper case */
ret = ldb_dn_set_component(dn, i, upper_rdn_attr,
*ldb_dn_get_component_val(dn, i));
talloc_free(upper_rdn_attr);
if (ret != LDB_SUCCESS) {
return ret;
}
}
return LDB_SUCCESS;
}
static int normalize_search_callback(struct ldb_request *req, struct ldb_reply *ares)
{
struct ldb_message *msg;
struct norm_context *ac;
int i, j, ret;
ac = talloc_get_type(req->context, struct norm_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);
}
/* Only entries are interesting, and we handle the case of the parent seperatly */
switch (ares->type) {
case LDB_REPLY_ENTRY:
/* OK, we have one of *many* search results passing by here,
* but we should get them one at a time */
msg = ares->message;
ret = fix_dn(msg->dn);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
for (i = 0; i < msg->num_elements; i++) {
const struct dsdb_attribute *attribute = dsdb_attribute_by_lDAPDisplayName(ac->schema, msg->elements[i].name);
if (!attribute) {
continue;
}
/* Look to see if this attributeSyntax is a DN */
if (!((strcmp(attribute->attributeSyntax_oid, "2.5.5.1") == 0) ||
(strcmp(attribute->attributeSyntax_oid, "2.5.5.7") == 0))) {
continue;
}
for (j = 0; j < msg->elements[i].num_values; j++) {
const char *dn_str;
struct ldb_dn *dn = ldb_dn_from_ldb_val(ac, ac->module->ldb, &msg->elements[i].values[j]);
if (!dn) {
return ldb_module_done(ac->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
}
ret = fix_dn(dn);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
dn_str = talloc_steal(msg->elements[i].values, ldb_dn_get_linearized(dn));
msg->elements[i].values[j] = data_blob_string_const(dn_str);
talloc_free(dn);
}
}
return ldb_module_send_entry(ac->req, msg, 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);
}
return LDB_SUCCESS;
}
/* search */
static int normalise_search(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_request *down_req;
struct norm_context *ac;
int ret;
ac = talloc(req, struct norm_context);
if (ac == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
ac->module = module;
ac->req = req;
/* if schema not yet present just skip over */
ac->schema = dsdb_get_schema(ac->module->ldb);
if (ac->schema == NULL) {
talloc_free(ac);
return ldb_next_request(module, req);
}
ret = ldb_build_search_req_ex(&down_req, module->ldb, ac,
req->op.search.base,
req->op.search.scope,
req->op.search.tree,
req->op.search.attrs,
req->controls,
ac, normalize_search_callback,
req);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
return ldb_next_request(module, down_req);
}
_PUBLIC_ const struct ldb_module_ops ldb_normalise_module_ops = {
.name = "normalise",
.search = normalise_search,
};
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