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
;
378 DEBUG(10, ("BindSASL dn: %s\n",req
->dn
));
380 reply
= ldapsrv_init_reply(call
, LDAP_TAG_BindResponse
);
382 return NT_STATUS_NO_MEMORY
;
384 resp
= &reply
->msg
->r
.BindResponse
;
385 /* Windows 2000 mmc doesn't like secblob == NULL and reports a decoding error */
386 resp
->SASL
.secblob
= talloc_zero(reply
, DATA_BLOB
);
387 if (resp
->SASL
.secblob
== NULL
) {
388 return NT_STATUS_NO_MEMORY
;
394 * TODO: a SASL bind with a different mechanism
395 * should cancel an inprogress SASL bind.
400 status
= ldapsrv_setup_gensec(conn
, req
->creds
.SASL
.mechanism
,
402 if (!NT_STATUS_IS_OK(status
)) {
403 DEBUG(1, ("Failed to start GENSEC server for [%s] code: %s\n",
404 ldb_binary_encode_string(call
, req
->creds
.SASL
.mechanism
),
406 result
= LDAP_OPERATIONS_ERROR
;
407 errstr
= talloc_asprintf(reply
, "SASL: Failed to start authentication system: %s",
413 if (NT_STATUS_IS_OK(status
)) {
414 DATA_BLOB input
= data_blob(NULL
, 0);
415 DATA_BLOB output
= data_blob(NULL
, 0);
417 if (req
->creds
.SASL
.secblob
) {
418 input
= *req
->creds
.SASL
.secblob
;
421 status
= gensec_update_ev(conn
->gensec
, reply
, conn
->connection
->event
.ctx
,
424 *resp
->SASL
.secblob
= output
;
427 if (NT_STATUS_EQUAL(NT_STATUS_MORE_PROCESSING_REQUIRED
, status
)) {
428 result
= LDAP_SASL_BIND_IN_PROGRESS
;
431 } else if (NT_STATUS_IS_OK(status
)) {
432 struct ldapsrv_sasl_postprocess_context
*context
= NULL
;
434 result
= LDAP_SUCCESS
;
437 if (gensec_have_feature(conn
->gensec
, GENSEC_FEATURE_SIGN
) ||
438 gensec_have_feature(conn
->gensec
, GENSEC_FEATURE_SEAL
)) {
440 context
= talloc(call
, struct ldapsrv_sasl_postprocess_context
);
443 status
= NT_STATUS_NO_MEMORY
;
447 if (context
&& conn
->sockets
.tls
) {
448 TALLOC_FREE(context
);
449 status
= NT_STATUS_NOT_SUPPORTED
;
450 result
= LDAP_UNWILLING_TO_PERFORM
;
451 errstr
= talloc_asprintf(reply
,
452 "SASL:[%s]: Sign or Seal are not allowed if TLS is used",
453 req
->creds
.SASL
.mechanism
);
457 if (context
&& conn
->sockets
.sasl
) {
458 TALLOC_FREE(context
);
459 status
= NT_STATUS_NOT_SUPPORTED
;
460 result
= LDAP_UNWILLING_TO_PERFORM
;
461 errstr
= talloc_asprintf(reply
,
462 "SASL:[%s]: Sign or Seal are not allowed if SASL encryption has already been set up",
463 req
->creds
.SASL
.mechanism
);
468 context
->conn
= conn
;
469 status
= gensec_create_tstream(context
,
470 context
->conn
->gensec
,
471 context
->conn
->sockets
.raw
,
473 if (NT_STATUS_IS_OK(status
)) {
474 if (!talloc_reference(context
->sasl
, conn
->gensec
)) {
475 status
= NT_STATUS_NO_MEMORY
;
479 switch (call
->conn
->require_strong_auth
) {
480 case LDAP_SERVER_REQUIRE_STRONG_AUTH_NO
:
482 case LDAP_SERVER_REQUIRE_STRONG_AUTH_ALLOW_SASL_OVER_TLS
:
483 if (call
->conn
->sockets
.active
== call
->conn
->sockets
.tls
) {
486 status
= NT_STATUS_NETWORK_ACCESS_DENIED
;
487 result
= LDAP_STRONG_AUTH_REQUIRED
;
488 errstr
= talloc_asprintf(reply
,
489 "SASL:[%s]: not allowed if TLS is used.",
490 req
->creds
.SASL
.mechanism
);
493 case LDAP_SERVER_REQUIRE_STRONG_AUTH_YES
:
494 status
= NT_STATUS_NETWORK_ACCESS_DENIED
;
495 result
= LDAP_STRONG_AUTH_REQUIRED
;
496 errstr
= talloc_asprintf(reply
,
497 "SASL:[%s]: Sign or Seal are required.",
498 req
->creds
.SASL
.mechanism
);
503 if (result
!= LDAP_SUCCESS
) {
504 } else if (!NT_STATUS_IS_OK(status
)) {
505 result
= LDAP_OPERATIONS_ERROR
;
506 errstr
= talloc_asprintf(reply
,
507 "SASL:[%s]: Failed to setup SASL socket: %s",
508 req
->creds
.SASL
.mechanism
, nt_errstr(status
));
511 struct auth_session_info
*old_session_info
=NULL
;
513 old_session_info
= conn
->session_info
;
514 conn
->session_info
= NULL
;
515 status
= gensec_session_info(conn
->gensec
, conn
, &conn
->session_info
);
516 if (!NT_STATUS_IS_OK(status
)) {
517 conn
->session_info
= old_session_info
;
518 result
= LDAP_OPERATIONS_ERROR
;
519 errstr
= talloc_asprintf(reply
,
520 "SASL:[%s]: Failed to get session info: %s",
521 req
->creds
.SASL
.mechanism
, nt_errstr(status
));
524 talloc_unlink(conn
, old_session_info
);
526 /* don't leak the old LDB */
527 talloc_unlink(conn
, conn
->ldb
);
529 call
->conn
->authz_logged
= true;
531 status
= ldapsrv_backend_Init(conn
);
533 if (!NT_STATUS_IS_OK(status
)) {
534 result
= LDAP_OPERATIONS_ERROR
;
535 errstr
= talloc_asprintf(reply
,
536 "SASL:[%s]: Failed to advise samdb of new credentials: %s",
537 req
->creds
.SASL
.mechanism
,
544 if (NT_STATUS_IS_OK(status
) && context
) {
545 call
->postprocess_send
= ldapsrv_sasl_postprocess_send
;
546 call
->postprocess_recv
= ldapsrv_sasl_postprocess_recv
;
547 call
->postprocess_private
= context
;
549 talloc_unlink(conn
, conn
->gensec
);
552 status
= nt_status_squash(status
);
554 result
= LDAP_INVALID_CREDENTIALS
;
555 errstr
= ldapsrv_bind_error_msg(reply
, HRES_SEC_E_LOGON_DENIED
,
558 talloc_unlink(conn
, conn
->gensec
);
564 resp
->response
.resultcode
= result
;
565 resp
->response
.dn
= NULL
;
566 resp
->response
.errormessage
= errstr
;
567 resp
->response
.referral
= NULL
;
569 ldapsrv_queue_reply(call
, reply
);
573 NTSTATUS
ldapsrv_BindRequest(struct ldapsrv_call
*call
)
575 struct ldap_BindRequest
*req
= &call
->request
->r
.BindRequest
;
576 struct ldapsrv_reply
*reply
;
577 struct ldap_BindResponse
*resp
;
579 if (call
->conn
->pending_calls
!= NULL
) {
580 reply
= ldapsrv_init_reply(call
, LDAP_TAG_BindResponse
);
582 return NT_STATUS_NO_MEMORY
;
585 resp
= &reply
->msg
->r
.BindResponse
;
586 resp
->response
.resultcode
= LDAP_BUSY
;
587 resp
->response
.dn
= NULL
;
588 resp
->response
.errormessage
= talloc_asprintf(reply
, "Pending requests on this LDAP session");
589 resp
->response
.referral
= NULL
;
590 resp
->SASL
.secblob
= NULL
;
592 ldapsrv_queue_reply(call
, reply
);
597 * TODO: a simple bind should cancel an
598 * inprogress SASL bind.
601 switch (req
->mechanism
) {
602 case LDAP_AUTH_MECH_SIMPLE
:
603 return ldapsrv_BindSimple(call
);
604 case LDAP_AUTH_MECH_SASL
:
605 return ldapsrv_BindSASL(call
);
608 reply
= ldapsrv_init_reply(call
, LDAP_TAG_BindResponse
);
610 return NT_STATUS_NO_MEMORY
;
613 resp
= &reply
->msg
->r
.BindResponse
;
614 resp
->response
.resultcode
= LDAP_AUTH_METHOD_NOT_SUPPORTED
;
615 resp
->response
.dn
= NULL
;
616 resp
->response
.errormessage
= talloc_asprintf(reply
, "Bad AuthenticationChoice [%d]", req
->mechanism
);
617 resp
->response
.referral
= NULL
;
618 resp
->SASL
.secblob
= NULL
;
620 ldapsrv_queue_reply(call
, reply
);
624 struct ldapsrv_unbind_wait_context
{
628 struct ldapsrv_unbind_wait_state
{
632 static struct tevent_req
*ldapsrv_unbind_wait_send(TALLOC_CTX
*mem_ctx
,
633 struct tevent_context
*ev
,
636 struct ldapsrv_unbind_wait_context
*unbind_wait
=
637 talloc_get_type_abort(private_data
,
638 struct ldapsrv_unbind_wait_context
);
639 struct tevent_req
*req
;
640 struct ldapsrv_unbind_wait_state
*state
;
642 req
= tevent_req_create(mem_ctx
, &state
,
643 struct ldapsrv_unbind_wait_state
);
650 tevent_req_nterror(req
, NT_STATUS_LOCAL_DISCONNECT
);
651 return tevent_req_post(req
, ev
);
654 static NTSTATUS
ldapsrv_unbind_wait_recv(struct tevent_req
*req
)
656 return tevent_req_simple_recv_ntstatus(req
);
659 static NTSTATUS
ldapsrv_unbind_wait_setup(struct ldapsrv_call
*call
)
661 struct ldapsrv_unbind_wait_context
*unbind_wait
= NULL
;
663 if (call
->wait_private
!= NULL
) {
664 return NT_STATUS_INTERNAL_ERROR
;
667 unbind_wait
= talloc_zero(call
, struct ldapsrv_unbind_wait_context
);
668 if (unbind_wait
== NULL
) {
669 return NT_STATUS_NO_MEMORY
;
672 call
->wait_private
= unbind_wait
;
673 call
->wait_send
= ldapsrv_unbind_wait_send
;
674 call
->wait_recv
= ldapsrv_unbind_wait_recv
;
678 NTSTATUS
ldapsrv_UnbindRequest(struct ldapsrv_call
*call
)
680 struct ldapsrv_call
*c
= NULL
;
681 struct ldapsrv_call
*n
= NULL
;
683 DEBUG(10, ("UnbindRequest\n"));
685 for (c
= call
->conn
->pending_calls
; c
!= NULL
; c
= n
) {
688 DLIST_REMOVE(call
->conn
->pending_calls
, c
);
692 return ldapsrv_unbind_wait_setup(call
);