2 Unix SMB/CIFS implementation.
6 Copyright (C) Andrew Tridgell 2005
7 Copyright (C) Volker Lendecke 2004
8 Copyright (C) Stefan Metzmacher 2004
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "lib/events/events.h"
27 #include "auth/auth.h"
28 #include "dlinklist.h"
29 #include "libcli/util/asn_1.h"
30 #include "ldap_server/ldap_server.h"
31 #include "smbd/service_task.h"
32 #include "smbd/service_stream.h"
33 #include "lib/socket/socket.h"
34 #include "lib/tls/tls.h"
35 #include "lib/messaging/irpc.h"
36 #include "lib/stream/packet.h"
37 #include "lib/ldb/include/ldb.h"
38 #include "lib/ldb/include/ldb_errors.h"
41 close the socket and shutdown a server_context
43 static void ldapsrv_terminate_connection(struct ldapsrv_connection *conn,
47 talloc_free(conn->tls);
50 stream_terminate_connection(conn->connection, reason);
56 static void ldapsrv_error_handler(void *private, NTSTATUS status)
58 struct ldapsrv_connection *conn = talloc_get_type(private,
59 struct ldapsrv_connection);
60 ldapsrv_terminate_connection(conn, nt_errstr(status));
64 process a decoded ldap message
66 static void ldapsrv_process_message(struct ldapsrv_connection *conn,
67 struct ldap_message *msg)
69 struct ldapsrv_call *call;
72 BOOL enable_wrap = conn->enable_wrap;
74 call = talloc(conn, struct ldapsrv_call);
76 ldapsrv_terminate_connection(conn, "no memory");
80 call->request = talloc_steal(call, msg);
85 status = ldapsrv_do_call(call);
86 if (!NT_STATUS_IS_OK(status)) {
90 blob = data_blob(NULL, 0);
92 if (call->replies == NULL) {
97 /* build all the replies into a single blob */
98 while (call->replies) {
101 msg = call->replies->msg;
102 if (!ldap_encode(msg, &b, call)) {
103 DEBUG(0,("Failed to encode ldap reply of type %d\n", msg->type));
107 status = data_blob_append(call, &blob, b.data, b.length);
110 if (!NT_STATUS_IS_OK(status)) goto failed;
112 DLIST_REMOVE(call->replies, call->replies);
115 /* possibly encrypt/sign the reply */
119 status = gensec_wrap(conn->gensec, call, &blob, &wrapped);
120 if (!NT_STATUS_IS_OK(status)) {
123 data_blob_free(&blob);
124 blob = data_blob_talloc(call, NULL, wrapped.length + 4);
125 if (blob.data == NULL) {
128 RSIVAL(blob.data, 0, wrapped.length);
129 memcpy(blob.data+4, wrapped.data, wrapped.length);
130 data_blob_free(&wrapped);
133 packet_send(conn->packet, blob);
143 decode the input buffer
145 static NTSTATUS ldapsrv_decode_plain(struct ldapsrv_connection *conn, DATA_BLOB blob)
147 struct asn1_data asn1;
148 struct ldap_message *msg = talloc(conn, struct ldap_message);
151 return NT_STATUS_NO_MEMORY;
154 if (!asn1_load(&asn1, blob)) {
155 return NT_STATUS_NO_MEMORY;
158 if (!ldap_decode(&asn1, msg)) {
160 return NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
163 data_blob_free(&blob);
164 ldapsrv_process_message(conn, msg);
171 decode/process wrapped data
173 static NTSTATUS ldapsrv_decode_wrapped(struct ldapsrv_connection *conn,
176 DATA_BLOB wrapped, unwrapped;
177 struct asn1_data asn1;
178 struct ldap_message *msg = talloc(conn, struct ldap_message);
182 return NT_STATUS_NO_MEMORY;
185 wrapped = data_blob_const(blob.data+4, blob.length-4);
187 status = gensec_unwrap(conn->gensec, msg, &wrapped, &unwrapped);
188 if (!NT_STATUS_IS_OK(status)) {
189 return NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
192 data_blob_free(&blob);
194 if (!asn1_load(&asn1, unwrapped)) {
195 return NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
198 while (ldap_decode(&asn1, msg)) {
199 ldapsrv_process_message(conn, msg);
200 msg = talloc(conn, struct ldap_message);
203 if (asn1.ofs < asn1.length) {
204 return NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
216 static NTSTATUS ldapsrv_decode(void *private, DATA_BLOB blob)
218 struct ldapsrv_connection *conn = talloc_get_type(private,
219 struct ldapsrv_connection);
220 if (conn->enable_wrap) {
221 return ldapsrv_decode_wrapped(conn, blob);
223 return ldapsrv_decode_plain(conn, blob);
229 static void ldapsrv_conn_idle_timeout(struct event_context *ev,
230 struct timed_event *te,
234 struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
236 ldapsrv_terminate_connection(conn, "Timeout. No requests after bind");
240 called when a LDAP socket becomes readable
242 static void ldapsrv_recv(struct stream_connection *c, uint16_t flags)
244 struct ldapsrv_connection *conn =
245 talloc_get_type(c->private, struct ldapsrv_connection);
247 if (conn->limits.ite) { /* clean initial timeout if any */
248 talloc_free(conn->limits.ite);
249 conn->limits.ite = NULL;
252 if (conn->limits.te) { /* clean idle timeout if any */
253 talloc_free(conn->limits.te);
254 conn->limits.te = NULL;
257 packet_recv(conn->packet);
259 /* set idle timeout */
260 conn->limits.te = event_add_timed(c->event.ctx, conn,
261 timeval_current_ofs(conn->limits.conn_idle_time, 0),
262 ldapsrv_conn_idle_timeout, conn);
266 check if a blob is a complete ldap packet
267 handle wrapper or unwrapped connections
269 NTSTATUS ldapsrv_complete_packet(void *private, DATA_BLOB blob, size_t *size)
271 struct ldapsrv_connection *conn = talloc_get_type(private,
272 struct ldapsrv_connection);
273 if (conn->enable_wrap) {
274 return packet_full_request_u32(private, blob, size);
276 return ldap_full_packet(private, blob, size);
280 called when a LDAP socket becomes writable
282 static void ldapsrv_send(struct stream_connection *c, uint16_t flags)
284 struct ldapsrv_connection *conn =
285 talloc_get_type(c->private, struct ldapsrv_connection);
287 packet_queue_run(conn->packet);
290 static void ldapsrv_conn_init_timeout(struct event_context *ev,
291 struct timed_event *te,
295 struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
297 ldapsrv_terminate_connection(conn, "Timeout. No requests after initial connection");
300 static int ldapsrv_load_limits(struct ldapsrv_connection *conn)
303 const char *attrs[] = { "configurationNamingContext", NULL };
304 const char *attrs2[] = { "lDAPAdminLimits", NULL };
305 const char *conf_dn_s;
306 struct ldb_message_element *el;
307 struct ldb_result *res = NULL;
308 struct ldb_dn *basedn;
309 struct ldb_dn *conf_dn;
310 struct ldb_dn *policy_dn;
313 /* set defaults limits in case of failure */
314 conn->limits.initial_timeout = 120;
315 conn->limits.conn_idle_time = 900;
316 conn->limits.max_page_size = 1000;
317 conn->limits.search_timeout = 120;
320 tmp_ctx = talloc_new(conn);
321 if (tmp_ctx == NULL) {
325 basedn = ldb_dn_explode(tmp_ctx, "");
326 if (basedn == NULL) {
330 ret = ldb_search(conn->ldb, basedn, LDB_SCOPE_BASE, NULL, attrs, &res);
331 talloc_steal(tmp_ctx, res);
332 if (ret != LDB_SUCCESS || res->count != 1) {
336 conf_dn_s = ldb_msg_find_string(res->msgs[0], "configurationNamingContext", NULL);
337 if (conf_dn_s == NULL) {
340 conf_dn = ldb_dn_explode(tmp_ctx, conf_dn_s);
341 if (conf_dn == NULL) {
345 policy_dn = ldb_dn_string_compose(tmp_ctx, conf_dn, "CN=Default Query Policy,CN=Query-Policies,CN=Directory Service,CN=Windows NT,CN=Services");
346 if (policy_dn == NULL) {
350 ret = ldb_search(conn->ldb, policy_dn, LDB_SCOPE_BASE, NULL, attrs2, &res);
351 talloc_steal(tmp_ctx, res);
352 if (ret != LDB_SUCCESS || res->count != 1) {
356 el = ldb_msg_find_element(res->msgs[0], "lDAPAdminLimits");
361 for (i = 0; i < el->num_values; i++) {
362 char policy_name[256];
365 s = sscanf((const char *)el->values[i].data, "%255[^=]=%d", policy_name, &policy_value);
366 if (ret != 2 || policy_value == 0)
369 if (strcasecmp("InitRecvTimeout", policy_name) == 0) {
370 conn->limits.initial_timeout = policy_value;
373 if (strcasecmp("MaxConnIdleTime", policy_name) == 0) {
374 conn->limits.conn_idle_time = policy_value;
377 if (strcasecmp("MaxPageSize", policy_name) == 0) {
378 conn->limits.max_page_size = policy_value;
381 if (strcasecmp("MaxQueryDuration", policy_name) == 0) {
382 conn->limits.search_timeout = policy_value;
390 DEBUG(0, ("Failed to load ldap server query policies\n"));
391 talloc_free(tmp_ctx);
396 initialise a server_context from a open socket and register a event handler
397 for reading from that socket
399 static void ldapsrv_accept(struct stream_connection *c)
401 struct ldapsrv_service *ldapsrv_service =
402 talloc_get_type(c->private, struct ldapsrv_service);
403 struct ldapsrv_connection *conn;
404 struct cli_credentials *server_credentials;
405 struct socket_address *socket_address;
409 conn = talloc_zero(c, struct ldapsrv_connection);
411 stream_terminate_connection(c, "ldapsrv_accept: out of memory");
415 conn->enable_wrap = False;
417 conn->connection = c;
418 conn->service = ldapsrv_service;
421 = cli_credentials_init(conn);
422 if (!server_credentials) {
423 stream_terminate_connection(c, "Failed to init server credentials\n");
428 cli_credentials_set_conf(server_credentials);
429 status = cli_credentials_set_machine_account(server_credentials);
430 if (!NT_STATUS_IS_OK(status)) {
431 stream_terminate_connection(c, talloc_asprintf(conn, "Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
435 conn->server_credentials = server_credentials;
439 socket_address = socket_get_my_addr(c->socket, conn);
440 if (!socket_address) {
441 ldapsrv_terminate_connection(conn, "ldapsrv_accept: failed to obtain local socket address!");
444 port = socket_address->port;
445 talloc_free(socket_address);
447 conn->tls = tls_init_server(ldapsrv_service->tls_params, c->socket,
448 c->event.fde, NULL, port != 389);
450 ldapsrv_terminate_connection(conn, "ldapsrv_accept: tls_init_server() failed");
454 conn->packet = packet_init(conn);
455 if (conn->packet == NULL) {
456 ldapsrv_terminate_connection(conn, "out of memory");
459 packet_set_private(conn->packet, conn);
460 packet_set_tls(conn->packet, conn->tls);
461 packet_set_callback(conn->packet, ldapsrv_decode);
462 packet_set_full_request(conn->packet, ldapsrv_complete_packet);
463 packet_set_error_handler(conn->packet, ldapsrv_error_handler);
464 packet_set_event_context(conn->packet, c->event.ctx);
465 packet_set_fde(conn->packet, c->event.fde);
466 packet_set_serialise(conn->packet);
468 /* Connections start out anonymous */
469 if (!NT_STATUS_IS_OK(auth_anonymous_session_info(conn, &conn->session_info))) {
470 ldapsrv_terminate_connection(conn, "failed to setup anonymous session info");
474 if (!NT_STATUS_IS_OK(ldapsrv_backend_Init(conn))) {
475 ldapsrv_terminate_connection(conn, "backend Init failed");
479 /* load limits from the conf partition */
480 ldapsrv_load_limits(conn); /* should we fail on error ? */
482 /* register the server */
483 irpc_add_name(c->msg_ctx, "ldap_server");
485 /* set connections limits */
486 conn->limits.ite = event_add_timed(c->event.ctx, conn,
487 timeval_current_ofs(conn->limits.initial_timeout, 0),
488 ldapsrv_conn_init_timeout, conn);
491 static const struct stream_server_ops ldap_stream_ops = {
493 .accept_connection = ldapsrv_accept,
494 .recv_handler = ldapsrv_recv,
495 .send_handler = ldapsrv_send,
499 add a socket address to the list of events, one event per port
501 static NTSTATUS add_socket(struct event_context *event_context,
502 const struct model_ops *model_ops,
503 const char *address, struct ldapsrv_service *ldap_service)
508 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
509 "ipv4", address, &port, ldap_service);
510 if (!NT_STATUS_IS_OK(status)) {
511 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
512 address, port, nt_errstr(status)));
515 if (tls_support(ldap_service->tls_params)) {
516 /* add ldaps server */
518 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
519 "ipv4", address, &port, ldap_service);
520 if (!NT_STATUS_IS_OK(status)) {
521 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
522 address, port, nt_errstr(status)));
526 /* if we are a PDC, then also enable the global catalog server port, 3268 */
527 if (lp_server_role() == ROLE_DOMAIN_PDC) {
529 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
530 "ipv4", address, &port, ldap_service);
531 if (!NT_STATUS_IS_OK(status)) {
532 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
533 address, port, nt_errstr(status)));
541 open the ldap server sockets
543 static void ldapsrv_task_init(struct task_server *task)
545 struct ldapsrv_service *ldap_service;
550 ldap_service = talloc_zero(task, struct ldapsrv_service);
551 if (ldap_service == NULL) goto failed;
553 ldap_service->tls_params = tls_initialise(ldap_service);
554 if (ldap_service->tls_params == NULL) goto failed;
556 if (lp_interfaces() && lp_bind_interfaces_only()) {
557 int num_interfaces = iface_count();
560 /* We have been given an interfaces line, and been
561 told to only bind to those interfaces. Create a
562 socket per interface and bind to only these.
564 for(i = 0; i < num_interfaces; i++) {
565 const char *address = iface_n_ip(i);
566 status = add_socket(task->event_ctx, task->model_ops, address, ldap_service);
567 if (!NT_STATUS_IS_OK(status)) goto failed;
570 status = add_socket(task->event_ctx, task->model_ops, lp_socket_address(), ldap_service);
571 if (!NT_STATUS_IS_OK(status)) goto failed;
577 task_server_terminate(task, "Failed to startup ldap server task");
581 called on startup of the web server service It's job is to start
582 listening on all configured sockets
584 static NTSTATUS ldapsrv_init(struct event_context *event_context,
585 const struct model_ops *model_ops)
587 return task_server_startup(event_context, model_ops, ldapsrv_task_init);
591 NTSTATUS server_service_ldap_init(void)
593 return register_server_service("ldap", ldapsrv_init);