2 Unix SMB/CIFS implementation.
4 Copyright (C) Stefan Metzmacher 2004
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "ldap_server/ldap_server.h"
22 #include "auth/auth.h"
23 #include "smbd/service.h"
25 #include <ldb_errors.h>
26 #include "../lib/util/dlinklist.h"
27 #include "dsdb/samdb/samdb.h"
28 #include "auth/gensec/gensec.h"
29 #include "auth/gensec/gensec_tstream.h"
30 #include "param/param.h"
31 #include "../lib/util/tevent_ntstatus.h"
33 static char *ldapsrv_bind_error_msg(TALLOC_CTX *mem_ctx,
41 status = nt_status_squash(status);
42 werr = ntstatus_to_werror(status);
45 * There are 4 lower case hex digits following 'v' at the end,
46 * but different Windows Versions return different values:
48 * Windows 2008R2 uses 'v1db1'
49 * Windows 2012R2 uses 'v2580'
51 * We just match Windows 2008R2 as that's what was referenced
52 * in https://bugzilla.samba.org/show_bug.cgi?id=9048
54 msg = talloc_asprintf(mem_ctx, "%08X: LdapErr: DSID-%08X, comment: "
55 "AcceptSecurityContext error, data %x, v1db1",
56 (unsigned)HRES_ERROR_V(hresult),
58 (unsigned)W_ERROR_V(werr));
63 struct ldapsrv_bind_wait_context {
64 struct ldapsrv_reply *reply;
65 struct tevent_req *req;
70 struct ldapsrv_bind_wait_state {
74 static struct tevent_req *ldapsrv_bind_wait_send(TALLOC_CTX *mem_ctx,
75 struct tevent_context *ev,
78 struct ldapsrv_bind_wait_context *bind_wait =
79 talloc_get_type_abort(private_data,
80 struct ldapsrv_bind_wait_context);
81 struct tevent_req *req;
82 struct ldapsrv_bind_wait_state *state;
84 req = tevent_req_create(mem_ctx, &state,
85 struct ldapsrv_bind_wait_state);
91 tevent_req_defer_callback(req, ev);
93 if (!bind_wait->done) {
97 if (tevent_req_nterror(req, bind_wait->status)) {
98 return tevent_req_post(req, ev);
101 tevent_req_done(req);
102 return tevent_req_post(req, ev);
105 static NTSTATUS ldapsrv_bind_wait_recv(struct tevent_req *req)
107 return tevent_req_simple_recv_ntstatus(req);
110 static NTSTATUS ldapsrv_bind_wait_setup(struct ldapsrv_call *call,
111 struct ldapsrv_reply *reply)
113 struct ldapsrv_bind_wait_context *bind_wait = NULL;
115 if (call->wait_private != NULL) {
116 return NT_STATUS_INTERNAL_ERROR;
119 bind_wait = talloc_zero(call, struct ldapsrv_bind_wait_context);
120 if (bind_wait == NULL) {
121 return NT_STATUS_NO_MEMORY;
123 bind_wait->reply = reply;
125 call->wait_private = bind_wait;
126 call->wait_send = ldapsrv_bind_wait_send;
127 call->wait_recv = ldapsrv_bind_wait_recv;
131 static void ldapsrv_bind_wait_finished(struct ldapsrv_call *call,
134 struct ldapsrv_bind_wait_context *bind_wait =
135 talloc_get_type_abort(call->wait_private,
136 struct ldapsrv_bind_wait_context);
138 bind_wait->done = true;
139 bind_wait->status = status;
141 if (bind_wait->req == NULL) {
145 if (tevent_req_nterror(bind_wait->req, status)) {
149 tevent_req_done(bind_wait->req);
152 static void ldapsrv_BindSimple_done(struct tevent_req *subreq);
154 static NTSTATUS ldapsrv_BindSimple(struct ldapsrv_call *call)
156 struct ldap_BindRequest *req = &call->request->r.BindRequest;
157 struct ldapsrv_reply *reply = NULL;
158 struct ldap_BindResponse *resp = NULL;
160 const char *errstr = NULL;
162 bool using_tls = call->conn->sockets.active == call->conn->sockets.tls;
163 struct tevent_req *subreq = NULL;
165 DEBUG(10, ("BindSimple dn: %s\n",req->dn));
167 reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
169 return NT_STATUS_NO_MEMORY;
172 if (req->dn != NULL &&
173 strlen(req->dn) != 0 &&
174 call->conn->require_strong_auth > LDAP_SERVER_REQUIRE_STRONG_AUTH_NO &&
177 status = NT_STATUS_NETWORK_ACCESS_DENIED;
178 result = LDAP_STRONG_AUTH_REQUIRED;
179 errstr = talloc_asprintf(reply,
180 "BindSimple: Transport encryption required.");
184 subreq = authenticate_ldap_simple_bind_send(call,
185 call->conn->connection->event.ctx,
186 call->conn->connection->msg_ctx,
188 call->conn->connection->remote_address,
189 call->conn->connection->local_address,
192 req->creds.password);
193 if (subreq == NULL) {
194 return NT_STATUS_NO_MEMORY;
196 tevent_req_set_callback(subreq, ldapsrv_BindSimple_done, call);
198 status = ldapsrv_bind_wait_setup(call, reply);
199 if (!NT_STATUS_IS_OK(status)) {
205 * The rest will be async.
210 resp = &reply->msg->r.BindResponse;
211 resp->response.resultcode = result;
212 resp->response.errormessage = errstr;
213 resp->response.dn = NULL;
214 resp->response.referral = NULL;
215 resp->SASL.secblob = NULL;
217 ldapsrv_queue_reply(call, reply);
221 static void ldapsrv_BindSimple_done(struct tevent_req *subreq)
223 struct ldapsrv_call *call =
224 tevent_req_callback_data(subreq,
225 struct ldapsrv_call);
226 struct ldapsrv_bind_wait_context *bind_wait =
227 talloc_get_type_abort(call->wait_private,
228 struct ldapsrv_bind_wait_context);
229 struct ldapsrv_reply *reply = bind_wait->reply;
230 struct auth_session_info *session_info = NULL;
232 struct ldap_BindResponse *resp = NULL;
234 const char *errstr = NULL;
236 status = authenticate_ldap_simple_bind_recv(subreq,
239 if (NT_STATUS_IS_OK(status)) {
240 result = LDAP_SUCCESS;
243 talloc_unlink(call->conn, call->conn->session_info);
244 call->conn->session_info = talloc_steal(call->conn, session_info);
246 call->conn->authz_logged = true;
248 /* don't leak the old LDB */
249 talloc_unlink(call->conn, call->conn->ldb);
251 status = ldapsrv_backend_Init(call->conn);
253 if (!NT_STATUS_IS_OK(status)) {
254 result = LDAP_OPERATIONS_ERROR;
255 errstr = talloc_asprintf(reply, "Simple Bind: Failed to advise ldb new credentials: %s", nt_errstr(status));
258 status = nt_status_squash(status);
260 result = LDAP_INVALID_CREDENTIALS;
261 errstr = ldapsrv_bind_error_msg(reply, HRES_SEC_E_INVALID_TOKEN,
265 resp = &reply->msg->r.BindResponse;
266 resp->response.resultcode = result;
267 resp->response.errormessage = errstr;
268 resp->response.dn = NULL;
269 resp->response.referral = NULL;
270 resp->SASL.secblob = NULL;
272 ldapsrv_queue_reply(call, reply);
273 ldapsrv_bind_wait_finished(call, NT_STATUS_OK);
276 struct ldapsrv_sasl_postprocess_context {
277 struct ldapsrv_connection *conn;
278 struct tstream_context *sasl;
281 struct ldapsrv_sasl_postprocess_state {
285 static struct tevent_req *ldapsrv_sasl_postprocess_send(TALLOC_CTX *mem_ctx,
286 struct tevent_context *ev,
289 struct ldapsrv_sasl_postprocess_context *context =
290 talloc_get_type_abort(private_data,
291 struct ldapsrv_sasl_postprocess_context);
292 struct tevent_req *req;
293 struct ldapsrv_sasl_postprocess_state *state;
295 req = tevent_req_create(mem_ctx, &state,
296 struct ldapsrv_sasl_postprocess_state);
301 TALLOC_FREE(context->conn->sockets.sasl);
302 context->conn->sockets.sasl = talloc_move(context->conn, &context->sasl);
303 context->conn->sockets.active = context->conn->sockets.sasl;
305 tevent_req_done(req);
306 return tevent_req_post(req, ev);
309 static NTSTATUS ldapsrv_sasl_postprocess_recv(struct tevent_req *req)
311 return tevent_req_simple_recv_ntstatus(req);
314 static NTSTATUS ldapsrv_setup_gensec(struct ldapsrv_connection *conn,
315 const char *sasl_mech,
316 struct gensec_security **_gensec_security)
320 struct gensec_security *gensec_security;
322 status = samba_server_gensec_start(conn,
323 conn->connection->event.ctx,
324 conn->connection->msg_ctx,
326 conn->server_credentials,
329 if (!NT_STATUS_IS_OK(status)) {
333 status = gensec_set_target_service_description(gensec_security,
335 if (!NT_STATUS_IS_OK(status)) {
339 status = gensec_set_remote_address(gensec_security,
340 conn->connection->remote_address);
341 if (!NT_STATUS_IS_OK(status)) {
345 status = gensec_set_local_address(gensec_security,
346 conn->connection->local_address);
347 if (!NT_STATUS_IS_OK(status)) {
351 gensec_want_feature(gensec_security, GENSEC_FEATURE_ASYNC_REPLIES);
352 gensec_want_feature(gensec_security, GENSEC_FEATURE_LDAP_STYLE);
354 if (conn->sockets.active == conn->sockets.tls) {
355 gensec_want_feature(gensec_security, GENSEC_FEATURE_LDAPS_TRANSPORT);
358 status = gensec_start_mech_by_sasl_name(gensec_security, sasl_mech);
360 if (!NT_STATUS_IS_OK(status)) {
364 *_gensec_security = gensec_security;
368 static NTSTATUS ldapsrv_BindSASL(struct ldapsrv_call *call)
370 struct ldap_BindRequest *req = &call->request->r.BindRequest;
371 struct ldapsrv_reply *reply;
372 struct ldap_BindResponse *resp;
373 struct ldapsrv_connection *conn;
375 const char *errstr=NULL;
376 NTSTATUS status = NT_STATUS_OK;
377 DATA_BLOB input = data_blob_null;
378 DATA_BLOB output = data_blob_null;
380 DEBUG(10, ("BindSASL dn: %s\n",req->dn));
382 reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
384 return NT_STATUS_NO_MEMORY;
386 resp = &reply->msg->r.BindResponse;
387 /* Windows 2000 mmc doesn't like secblob == NULL and reports a decoding error */
388 resp->SASL.secblob = talloc_zero(reply, DATA_BLOB);
389 if (resp->SASL.secblob == NULL) {
390 return NT_STATUS_NO_MEMORY;
396 * TODO: a SASL bind with a different mechanism
397 * should cancel an inprogress SASL bind.
402 status = ldapsrv_setup_gensec(conn, req->creds.SASL.mechanism,
404 if (!NT_STATUS_IS_OK(status)) {
405 DEBUG(1, ("Failed to start GENSEC server for [%s] code: %s\n",
406 ldb_binary_encode_string(call, req->creds.SASL.mechanism),
408 result = LDAP_OPERATIONS_ERROR;
409 errstr = talloc_asprintf(reply, "SASL: Failed to start authentication system: %s",
415 if (req->creds.SASL.secblob) {
416 input = *req->creds.SASL.secblob;
419 status = gensec_update_ev(conn->gensec, reply, conn->connection->event.ctx,
421 *resp->SASL.secblob = output;
423 if (NT_STATUS_EQUAL(NT_STATUS_MORE_PROCESSING_REQUIRED, status)) {
424 result = LDAP_SASL_BIND_IN_PROGRESS;
427 } else if (NT_STATUS_IS_OK(status)) {
428 struct ldapsrv_sasl_postprocess_context *context = NULL;
430 result = LDAP_SUCCESS;
433 if (gensec_have_feature(conn->gensec, GENSEC_FEATURE_SIGN) ||
434 gensec_have_feature(conn->gensec, GENSEC_FEATURE_SEAL)) {
436 context = talloc(call, struct ldapsrv_sasl_postprocess_context);
439 status = NT_STATUS_NO_MEMORY;
443 if (context && conn->sockets.tls) {
444 TALLOC_FREE(context);
445 status = NT_STATUS_NOT_SUPPORTED;
446 result = LDAP_UNWILLING_TO_PERFORM;
447 errstr = talloc_asprintf(reply,
448 "SASL:[%s]: Sign or Seal are not allowed if TLS is used",
449 req->creds.SASL.mechanism);
453 if (context && conn->sockets.sasl) {
454 TALLOC_FREE(context);
455 status = NT_STATUS_NOT_SUPPORTED;
456 result = LDAP_UNWILLING_TO_PERFORM;
457 errstr = talloc_asprintf(reply,
458 "SASL:[%s]: Sign or Seal are not allowed if SASL encryption has already been set up",
459 req->creds.SASL.mechanism);
464 context->conn = conn;
465 status = gensec_create_tstream(context,
466 context->conn->gensec,
467 context->conn->sockets.raw,
469 if (NT_STATUS_IS_OK(status)) {
470 if (!talloc_reference(context->sasl, conn->gensec)) {
471 status = NT_STATUS_NO_MEMORY;
475 switch (call->conn->require_strong_auth) {
476 case LDAP_SERVER_REQUIRE_STRONG_AUTH_NO:
478 case LDAP_SERVER_REQUIRE_STRONG_AUTH_ALLOW_SASL_OVER_TLS:
479 if (call->conn->sockets.active == call->conn->sockets.tls) {
482 status = NT_STATUS_NETWORK_ACCESS_DENIED;
483 result = LDAP_STRONG_AUTH_REQUIRED;
484 errstr = talloc_asprintf(reply,
485 "SASL:[%s]: not allowed if TLS is used.",
486 req->creds.SASL.mechanism);
489 case LDAP_SERVER_REQUIRE_STRONG_AUTH_YES:
490 status = NT_STATUS_NETWORK_ACCESS_DENIED;
491 result = LDAP_STRONG_AUTH_REQUIRED;
492 errstr = talloc_asprintf(reply,
493 "SASL:[%s]: Sign or Seal are required.",
494 req->creds.SASL.mechanism);
499 if (result != LDAP_SUCCESS) {
500 } else if (!NT_STATUS_IS_OK(status)) {
501 result = LDAP_OPERATIONS_ERROR;
502 errstr = talloc_asprintf(reply,
503 "SASL:[%s]: Failed to setup SASL socket: %s",
504 req->creds.SASL.mechanism, nt_errstr(status));
507 struct auth_session_info *old_session_info=NULL;
509 old_session_info = conn->session_info;
510 conn->session_info = NULL;
511 status = gensec_session_info(conn->gensec, conn, &conn->session_info);
512 if (!NT_STATUS_IS_OK(status)) {
513 conn->session_info = old_session_info;
514 result = LDAP_OPERATIONS_ERROR;
515 errstr = talloc_asprintf(reply,
516 "SASL:[%s]: Failed to get session info: %s",
517 req->creds.SASL.mechanism, nt_errstr(status));
520 talloc_unlink(conn, old_session_info);
522 /* don't leak the old LDB */
523 talloc_unlink(conn, conn->ldb);
525 call->conn->authz_logged = true;
527 status = ldapsrv_backend_Init(conn);
529 if (!NT_STATUS_IS_OK(status)) {
530 result = LDAP_OPERATIONS_ERROR;
531 errstr = talloc_asprintf(reply,
532 "SASL:[%s]: Failed to advise samdb of new credentials: %s",
533 req->creds.SASL.mechanism,
540 if (NT_STATUS_IS_OK(status) && context) {
541 call->postprocess_send = ldapsrv_sasl_postprocess_send;
542 call->postprocess_recv = ldapsrv_sasl_postprocess_recv;
543 call->postprocess_private = context;
545 talloc_unlink(conn, conn->gensec);
548 status = nt_status_squash(status);
550 result = LDAP_INVALID_CREDENTIALS;
551 errstr = ldapsrv_bind_error_msg(reply, HRES_SEC_E_LOGON_DENIED,
554 talloc_unlink(conn, conn->gensec);
560 resp->response.resultcode = result;
561 resp->response.dn = NULL;
562 resp->response.errormessage = errstr;
563 resp->response.referral = NULL;
565 ldapsrv_queue_reply(call, reply);
569 NTSTATUS ldapsrv_BindRequest(struct ldapsrv_call *call)
571 struct ldap_BindRequest *req = &call->request->r.BindRequest;
572 struct ldapsrv_reply *reply;
573 struct ldap_BindResponse *resp;
575 if (call->conn->pending_calls != NULL) {
576 reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
578 return NT_STATUS_NO_MEMORY;
581 resp = &reply->msg->r.BindResponse;
582 resp->response.resultcode = LDAP_BUSY;
583 resp->response.dn = NULL;
584 resp->response.errormessage = talloc_asprintf(reply, "Pending requests on this LDAP session");
585 resp->response.referral = NULL;
586 resp->SASL.secblob = NULL;
588 ldapsrv_queue_reply(call, reply);
593 * TODO: a simple bind should cancel an
594 * inprogress SASL bind.
597 switch (req->mechanism) {
598 case LDAP_AUTH_MECH_SIMPLE:
599 return ldapsrv_BindSimple(call);
600 case LDAP_AUTH_MECH_SASL:
601 return ldapsrv_BindSASL(call);
604 reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
606 return NT_STATUS_NO_MEMORY;
609 resp = &reply->msg->r.BindResponse;
610 resp->response.resultcode = LDAP_AUTH_METHOD_NOT_SUPPORTED;
611 resp->response.dn = NULL;
612 resp->response.errormessage = talloc_asprintf(reply, "Bad AuthenticationChoice [%d]", req->mechanism);
613 resp->response.referral = NULL;
614 resp->SASL.secblob = NULL;
616 ldapsrv_queue_reply(call, reply);
620 struct ldapsrv_unbind_wait_context {
624 struct ldapsrv_unbind_wait_state {
628 static struct tevent_req *ldapsrv_unbind_wait_send(TALLOC_CTX *mem_ctx,
629 struct tevent_context *ev,
632 struct ldapsrv_unbind_wait_context *unbind_wait =
633 talloc_get_type_abort(private_data,
634 struct ldapsrv_unbind_wait_context);
635 struct tevent_req *req;
636 struct ldapsrv_unbind_wait_state *state;
638 req = tevent_req_create(mem_ctx, &state,
639 struct ldapsrv_unbind_wait_state);
646 tevent_req_nterror(req, NT_STATUS_LOCAL_DISCONNECT);
647 return tevent_req_post(req, ev);
650 static NTSTATUS ldapsrv_unbind_wait_recv(struct tevent_req *req)
652 return tevent_req_simple_recv_ntstatus(req);
655 static NTSTATUS ldapsrv_unbind_wait_setup(struct ldapsrv_call *call)
657 struct ldapsrv_unbind_wait_context *unbind_wait = NULL;
659 if (call->wait_private != NULL) {
660 return NT_STATUS_INTERNAL_ERROR;
663 unbind_wait = talloc_zero(call, struct ldapsrv_unbind_wait_context);
664 if (unbind_wait == NULL) {
665 return NT_STATUS_NO_MEMORY;
668 call->wait_private = unbind_wait;
669 call->wait_send = ldapsrv_unbind_wait_send;
670 call->wait_recv = ldapsrv_unbind_wait_recv;
674 NTSTATUS ldapsrv_UnbindRequest(struct ldapsrv_call *call)
676 struct ldapsrv_call *c = NULL;
677 struct ldapsrv_call *n = NULL;
679 DEBUG(10, ("UnbindRequest\n"));
681 for (c = call->conn->pending_calls; c != NULL; c = n) {
684 DLIST_REMOVE(call->conn->pending_calls, c);
688 return ldapsrv_unbind_wait_setup(call);