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/*
Unix SMB/CIFS implementation.
LDAP server
Copyright (C) Stefan Metzmacher 2004
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/>.
*/
#include "includes.h"
#include "ldap_server/ldap_server.h"
#include "../lib/util/dlinklist.h"
#include "lib/tls/tls.h"
#include "smbd/service_stream.h"
#include "../lib/util/tevent_ntstatus.h"
struct ldapsrv_starttls_postprocess_context {
struct ldapsrv_connection *conn;
};
struct ldapsrv_starttls_postprocess_state {
struct ldapsrv_connection *conn;
};
static void ldapsrv_starttls_postprocess_done(struct tevent_req *subreq);
static struct tevent_req *ldapsrv_starttls_postprocess_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
void *private_data)
{
struct ldapsrv_starttls_postprocess_context *context =
talloc_get_type_abort(private_data,
struct ldapsrv_starttls_postprocess_context);
struct ldapsrv_connection *conn = context->conn;
struct tevent_req *req;
struct ldapsrv_starttls_postprocess_state *state;
struct tevent_req *subreq;
req = tevent_req_create(mem_ctx, &state,
struct ldapsrv_starttls_postprocess_state);
if (req == NULL) {
return NULL;
}
state->conn = conn;
subreq = tstream_tls_accept_send(conn,
conn->connection->event.ctx,
conn->sockets.raw,
conn->service->tls_params);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, ldapsrv_starttls_postprocess_done, req);
return req;
}
static void ldapsrv_starttls_postprocess_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct ldapsrv_starttls_postprocess_state *state =
tevent_req_data(req,
struct ldapsrv_starttls_postprocess_state);
struct ldapsrv_connection *conn = state->conn;
int ret;
int sys_errno;
ret = tstream_tls_accept_recv(subreq, &sys_errno,
conn, &conn->sockets.tls);
TALLOC_FREE(subreq);
if (ret == -1) {
NTSTATUS status = map_nt_error_from_unix_common(sys_errno);
DEBUG(1,("ldapsrv_starttls_postprocess_done: accept_tls_loop: "
"tstream_tls_accept_recv() - %d:%s => %s",
sys_errno, strerror(sys_errno), nt_errstr(status)));
tevent_req_nterror(req, status);
return;
}
conn->sockets.active = conn->sockets.tls;
tevent_req_done(req);
}
static NTSTATUS ldapsrv_starttls_postprocess_recv(struct tevent_req *req)
{
return tevent_req_simple_recv_ntstatus(req);
}
static NTSTATUS ldapsrv_StartTLS(struct ldapsrv_call *call,
struct ldapsrv_reply *reply,
const char **errstr)
{
struct ldapsrv_starttls_postprocess_context *context;
(*errstr) = NULL;
/*
* TODO: give LDAP_OPERATIONS_ERROR also when
* there're pending requests or there's
* a SASL bind in progress
* (see rfc4513 section 3.1.1)
*/
if (call->conn->sockets.tls) {
(*errstr) = talloc_asprintf(reply, "START-TLS: TLS is already enabled on this LDAP session");
return NT_STATUS_LDAP(LDAP_OPERATIONS_ERROR);
}
if (call->conn->sockets.sasl) {
(*errstr) = talloc_asprintf(reply, "START-TLS: SASL is already enabled on this LDAP session");
return NT_STATUS_LDAP(LDAP_OPERATIONS_ERROR);
}
context = talloc(call, struct ldapsrv_starttls_postprocess_context);
NT_STATUS_HAVE_NO_MEMORY(context);
context->conn = call->conn;
call->postprocess_send = ldapsrv_starttls_postprocess_send;
call->postprocess_recv = ldapsrv_starttls_postprocess_recv;
call->postprocess_private = context;
reply->msg->r.ExtendedResponse.response.resultcode = LDAP_SUCCESS;
reply->msg->r.ExtendedResponse.response.errormessage = NULL;
ldapsrv_queue_reply(call, reply);
return NT_STATUS_OK;
}
struct ldapsrv_extended_operation {
const char *oid;
NTSTATUS (*fn)(struct ldapsrv_call *call, struct ldapsrv_reply *reply, const char **errorstr);
};
static struct ldapsrv_extended_operation extended_ops[] = {
{
.oid = LDB_EXTENDED_START_TLS_OID,
.fn = ldapsrv_StartTLS,
},{
.oid = NULL,
.fn = NULL,
}
};
NTSTATUS ldapsrv_ExtendedRequest(struct ldapsrv_call *call)
{
struct ldap_ExtendedRequest *req = &call->request->r.ExtendedRequest;
struct ldapsrv_reply *reply;
int result = LDAP_PROTOCOL_ERROR;
const char *error_str = NULL;
NTSTATUS status = NT_STATUS_OK;
unsigned int i;
DEBUG(10, ("Extended\n"));
reply = ldapsrv_init_reply(call, LDAP_TAG_ExtendedResponse);
NT_STATUS_HAVE_NO_MEMORY(reply);
ZERO_STRUCT(reply->msg->r);
reply->msg->r.ExtendedResponse.oid = talloc_steal(reply, req->oid);
reply->msg->r.ExtendedResponse.response.resultcode = LDAP_PROTOCOL_ERROR;
reply->msg->r.ExtendedResponse.response.errormessage = NULL;
for (i=0; extended_ops[i].oid; i++) {
if (strcmp(extended_ops[i].oid,req->oid) != 0) continue;
/*
* if the backend function returns an error we
* need to send the reply otherwise the reply is already
* send and we need to return directly
*/
status = extended_ops[i].fn(call, reply, &error_str);
NT_STATUS_IS_OK_RETURN(status);
if (NT_STATUS_IS_LDAP(status)) {
result = NT_STATUS_LDAP_CODE(status);
} else {
result = LDAP_OPERATIONS_ERROR;
error_str = talloc_asprintf(reply, "Extended Operation(%s) failed: %s",
req->oid, nt_errstr(status));
}
}
/* if we haven't found the oid, then status is still NT_STATUS_OK */
if (NT_STATUS_IS_OK(status)) {
error_str = talloc_asprintf(reply, "Extended Operation(%s) not supported",
req->oid);
}
reply->msg->r.ExtendedResponse.response.resultcode = result;
reply->msg->r.ExtendedResponse.response.errormessage = error_str;
ldapsrv_queue_reply(call, reply);
return NT_STATUS_OK;
}
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