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/*
Unix SMB/CIFS implementation.
rootDSE ldb module
Copyright (C) Andrew Tridgell 2005
Copyright (C) Simo Sorce 2005
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_errors.h"
#include "lib/ldb/include/ldb_private.h"
#include "auth/gensec/gensec.h"
#include "system/time.h"
struct private_data {
int num_controls;
char **controls;
};
/*
return 1 if a specific attribute has been requested
*/
static int do_attribute(const char * const *attrs, const char *name)
{
return attrs == NULL ||
ldb_attr_in_list(attrs, name) ||
ldb_attr_in_list(attrs, "*");
}
/*
add dynamically generated attributes to rootDSE result
*/
static int rootdse_add_dynamic(struct ldb_module *module, struct ldb_request *req)
{
struct private_data *priv = talloc_get_type(module->private_data, struct private_data);
struct ldb_search *s = &req->op.search;
struct ldb_message *msg;
struct cli_credentials *server_creds;
/* this is gross, and will be removed when I change ldb_result not
to be so pointer crazy :-) */
if (s->res->msgs == NULL) {
return LDB_SUCCESS;
}
msg = s->res->msgs[0];
msg->dn = ldb_dn_explode(msg, "");
if (do_attribute(s->attrs, "currentTime")) {
if (ldb_msg_add_steal_string(msg, "currentTime",
ldb_timestring(msg, time(NULL))) != 0) {
goto failed;
}
}
if (do_attribute(s->attrs, "supportedControl")) {
int i;
for (i = 0; i < priv->num_controls; i++) {
char *control = talloc_strdup(msg, priv->controls[i]);
if (!control) {
goto failed;
}
if (ldb_msg_add_steal_string(msg, "supportedControl",
control) != 0) {
goto failed;
}
}
}
server_creds = talloc_get_type(ldb_get_opaque(module->ldb, "server_credentials"),
struct cli_credentials);
if (server_creds && do_attribute(s->attrs, "supportedSASLMechanisms")) {
struct gensec_security_ops **backends = gensec_security_all();
enum credentials_use_kerberos use_kerberos
= cli_credentials_get_kerberos_state(server_creds);
struct gensec_security_ops **ops
= gensec_use_kerberos_mechs(req, backends, use_kerberos);
int i;
for (i = 0; ops && ops[i]; i++) {
if (ops[i]->sasl_name) {
char *sasl_name = talloc_strdup(msg, ops[i]->sasl_name);
if (!sasl_name) {
goto failed;
}
if (ldb_msg_add_steal_string(msg, "supportedSASLMechanisms",
sasl_name) != 0) {
goto failed;
}
}
}
}
if (do_attribute(s->attrs, "highestCommittedUSN")) {
if (module->ldb->sequence_number != NULL &&
ldb_msg_add_fmt(msg, "highestCommittedUSN",
"%llu", module->ldb->sequence_number(module->ldb)) != 0) {
goto failed;
}
}
/* TODO: lots more dynamic attributes should be added here */
return 0;
failed:
return LDB_ERR_OPERATIONS_ERROR;
}
/*
handle search requests
*/
static int rootdse_search_bytree(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_search *s = &req->op.search;
int ret;
TALLOC_CTX *tmp_ctx;
/* see if its for the rootDSE */
if (s->scope != LDB_SCOPE_BASE ||
(s->base && s->base->comp_num != 0)) {
return ldb_next_request(module, req);
}
tmp_ctx = talloc_new(module);
/* in our db we store the rootDSE with a DN of cn=rootDSE */
s->base = ldb_dn_explode(tmp_ctx, "cn=rootDSE");
s->tree = ldb_parse_tree(tmp_ctx, "dn=*");
if (s->base == NULL || s->tree == NULL) {
ldb_oom(module->ldb);
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
/* grab the static contents of the record */
ret = ldb_next_request(module, req);
req->op.search.res = s->res;
if (ret == LDB_SUCCESS) {
ret = rootdse_add_dynamic(module, req);
}
talloc_free(tmp_ctx);
return ret;
}
static int rootdse_register_control(struct ldb_module *module, struct ldb_request *req)
{
struct private_data *priv = talloc_get_type(module->private_data, struct private_data);
char **list;
list = talloc_realloc(priv, priv->controls, char *, priv->num_controls + 1);
if (!list) {
return LDB_ERR_OPERATIONS_ERROR;
}
list[priv->num_controls] = talloc_strdup(list, req->op.reg.oid);
if (!list[priv->num_controls]) {
return LDB_ERR_OPERATIONS_ERROR;
}
priv->num_controls += 1;
priv->controls = list;
return LDB_SUCCESS;
}
static int rootdse_request(struct ldb_module *module, struct ldb_request *req)
{
switch (req->operation) {
case LDB_REQ_SEARCH:
return rootdse_search_bytree(module, req);
case LDB_REQ_REGISTER:
return rootdse_register_control(module, req);
default:
break;
}
return ldb_next_request(module, req);
}
static const struct ldb_module_ops rootdse_ops = {
.name = "rootdse",
.request = rootdse_request
};
struct ldb_module *rootdse_module_init(struct ldb_context *ldb, const char *options[])
{
struct ldb_module *ctx;
struct private_data *data;
ctx = talloc(ldb, struct ldb_module);
if (!ctx)
return NULL;
data = talloc(ctx, struct private_data);
if (data == NULL) {
talloc_free(ctx);
return NULL;
}
data->num_controls = 0;
data->controls = NULL;
ctx->private_data = data;
ctx->ldb = ldb;
ctx->prev = ctx->next = NULL;
ctx->ops = &rootdse_ops;
return ctx;
}
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