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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
*/
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 normalise_search_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares)
{
const struct dsdb_schema *schema = dsdb_get_schema(ldb);
struct ldb_request *orig_req = talloc_get_type(context, struct ldb_request);
TALLOC_CTX *mem_ctx;
int i, j, ret;
/* Only entries are interesting, and we handle the case of the parent seperatly */
if (ares->type != LDB_REPLY_ENTRY) {
return orig_req->callback(ldb, orig_req->context, ares);
}
if (!schema) {
return orig_req->callback(ldb, orig_req->context, ares);
}
mem_ctx = talloc_new(ares);
if (!mem_ctx) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
/* OK, we have one of *many* search results passing by here,
* but we should get them one at a time */
ret = fix_dn(ares->message->dn);
if (ret != LDB_SUCCESS) {
talloc_free(mem_ctx);
return ret;
}
for (i = 0; i < ares->message->num_elements; i++) {
const struct dsdb_attribute *attribute = dsdb_attribute_by_lDAPDisplayName(schema, ares->message->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 < ares->message->elements[i].num_values; j++) {
const char *dn_str;
struct ldb_dn *dn = ldb_dn_new(mem_ctx, ldb, (const char *)ares->message->elements[i].values[j].data);
if (!dn) {
talloc_free(mem_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = fix_dn(ares->message->dn);
if (ret != LDB_SUCCESS) {
talloc_free(mem_ctx);
return ret;
}
dn_str = talloc_steal(ares->message->elements[i].values, ldb_dn_get_linearized(dn));
ares->message->elements[i].values[j] = data_blob_string_const(dn_str);
talloc_free(dn);
}
}
talloc_free(mem_ctx);
return orig_req->callback(ldb, orig_req->context, ares);
}
/* search */
static int normalise_search(struct ldb_module *module, struct ldb_request *req)
{
int ret;
struct ldb_request *down_req = talloc(req, struct ldb_request);
if (!down_req) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
*down_req = *req;
down_req->context = req;
down_req->callback = normalise_search_callback;
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;
}
_PUBLIC_ const struct ldb_module_ops ldb_normalise_module_ops = {
.name = "normalise",
.search = normalise_search,
};
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