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 "dsdb/samdb/samdb.h"
27 #include "auth/gensec/gensec.h"
28 #include "auth/gensec/gensec_tstream.h"
29 #include "param/param.h"
30 #include "../lib/util/tevent_ntstatus.h"
32 static char *ldapsrv_bind_error_msg(TALLOC_CTX
*mem_ctx
,
40 status
= nt_status_squash(status
);
41 werr
= ntstatus_to_werror(status
);
44 * There are 4 lower case hex digits following 'v' at the end,
45 * but different Windows Versions return different values:
47 * Windows 2008R2 uses 'v1db1'
48 * Windows 2012R2 uses 'v2580'
50 * We just match Windows 2008R2 as that's what was referenced
51 * in https://bugzilla.samba.org/show_bug.cgi?id=9048
53 msg
= talloc_asprintf(mem_ctx
, "%08X: LdapErr: DSID-%08X, comment: "
54 "AcceptSecurityContext error, data %x, v1db1",
55 (unsigned)HRES_ERROR_V(hresult
),
57 (unsigned)W_ERROR_V(werr
));
63 static NTSTATUS
ldapsrv_BindSimple(struct ldapsrv_call
*call
)
65 struct ldap_BindRequest
*req
= &call
->request
->r
.BindRequest
;
66 struct ldapsrv_reply
*reply
;
67 struct ldap_BindResponse
*resp
;
72 struct auth_session_info
*session_info
;
76 DEBUG(10, ("BindSimple dn: %s\n",req
->dn
));
78 reply
= ldapsrv_init_reply(call
, LDAP_TAG_BindResponse
);
80 return NT_STATUS_NO_MEMORY
;
83 if (req
->dn
!= NULL
&&
84 strlen(req
->dn
) != 0 &&
85 call
->conn
->require_strong_auth
> LDAP_SERVER_REQUIRE_STRONG_AUTH_NO
&&
86 call
->conn
->sockets
.active
!= call
->conn
->sockets
.tls
)
88 status
= NT_STATUS_NETWORK_ACCESS_DENIED
;
89 result
= LDAP_STRONG_AUTH_REQUIRED
;
90 errstr
= talloc_asprintf(reply
,
91 "BindSimple: Transport encryption required.");
95 status
= authenticate_ldap_simple_bind(call
,
96 call
->conn
->connection
->event
.ctx
,
97 call
->conn
->connection
->msg_ctx
,
99 call
->conn
->connection
->remote_address
,
100 call
->conn
->connection
->local_address
,
105 if (NT_STATUS_IS_OK(status
)) {
106 result
= LDAP_SUCCESS
;
109 talloc_unlink(call
->conn
, call
->conn
->session_info
);
110 call
->conn
->session_info
= talloc_steal(call
->conn
, session_info
);
112 call
->conn
->authz_logged
= true;
114 /* don't leak the old LDB */
115 talloc_unlink(call
->conn
, call
->conn
->ldb
);
117 status
= ldapsrv_backend_Init(call
->conn
);
119 if (!NT_STATUS_IS_OK(status
)) {
120 result
= LDAP_OPERATIONS_ERROR
;
121 errstr
= talloc_asprintf(reply
, "Simple Bind: Failed to advise ldb new credentials: %s", nt_errstr(status
));
124 status
= nt_status_squash(status
);
126 result
= LDAP_INVALID_CREDENTIALS
;
127 errstr
= ldapsrv_bind_error_msg(reply
, HRES_SEC_E_INVALID_TOKEN
,
132 resp
= &reply
->msg
->r
.BindResponse
;
133 resp
->response
.resultcode
= result
;
134 resp
->response
.errormessage
= errstr
;
135 resp
->response
.dn
= NULL
;
136 resp
->response
.referral
= NULL
;
137 resp
->SASL
.secblob
= NULL
;
139 ldapsrv_queue_reply(call
, reply
);
143 struct ldapsrv_sasl_postprocess_context
{
144 struct ldapsrv_connection
*conn
;
145 struct tstream_context
*sasl
;
148 struct ldapsrv_sasl_postprocess_state
{
152 static struct tevent_req
*ldapsrv_sasl_postprocess_send(TALLOC_CTX
*mem_ctx
,
153 struct tevent_context
*ev
,
156 struct ldapsrv_sasl_postprocess_context
*context
=
157 talloc_get_type_abort(private_data
,
158 struct ldapsrv_sasl_postprocess_context
);
159 struct tevent_req
*req
;
160 struct ldapsrv_sasl_postprocess_state
*state
;
162 req
= tevent_req_create(mem_ctx
, &state
,
163 struct ldapsrv_sasl_postprocess_state
);
168 TALLOC_FREE(context
->conn
->sockets
.sasl
);
169 context
->conn
->sockets
.sasl
= talloc_move(context
->conn
, &context
->sasl
);
170 context
->conn
->sockets
.active
= context
->conn
->sockets
.sasl
;
172 tevent_req_done(req
);
173 return tevent_req_post(req
, ev
);
176 static NTSTATUS
ldapsrv_sasl_postprocess_recv(struct tevent_req
*req
)
178 return tevent_req_simple_recv_ntstatus(req
);
181 static NTSTATUS
ldapsrv_setup_gensec(struct ldapsrv_connection
*conn
,
182 const char *sasl_mech
,
183 struct gensec_security
**_gensec_security
)
187 struct gensec_security
*gensec_security
;
189 status
= samba_server_gensec_start(conn
,
190 conn
->connection
->event
.ctx
,
191 conn
->connection
->msg_ctx
,
193 conn
->server_credentials
,
196 if (!NT_STATUS_IS_OK(status
)) {
200 status
= gensec_set_target_service_description(gensec_security
,
202 if (!NT_STATUS_IS_OK(status
)) {
206 status
= gensec_set_remote_address(gensec_security
,
207 conn
->connection
->remote_address
);
208 if (!NT_STATUS_IS_OK(status
)) {
212 status
= gensec_set_local_address(gensec_security
,
213 conn
->connection
->local_address
);
214 if (!NT_STATUS_IS_OK(status
)) {
218 gensec_want_feature(gensec_security
, GENSEC_FEATURE_ASYNC_REPLIES
);
219 gensec_want_feature(gensec_security
, GENSEC_FEATURE_LDAP_STYLE
);
221 status
= gensec_start_mech_by_sasl_name(gensec_security
, sasl_mech
);
223 if (!NT_STATUS_IS_OK(status
)) {
227 *_gensec_security
= gensec_security
;
231 static NTSTATUS
ldapsrv_BindSASL(struct ldapsrv_call
*call
)
233 struct ldap_BindRequest
*req
= &call
->request
->r
.BindRequest
;
234 struct ldapsrv_reply
*reply
;
235 struct ldap_BindResponse
*resp
;
236 struct ldapsrv_connection
*conn
;
238 const char *errstr
=NULL
;
239 NTSTATUS status
= NT_STATUS_OK
;
241 DEBUG(10, ("BindSASL dn: %s\n",req
->dn
));
243 reply
= ldapsrv_init_reply(call
, LDAP_TAG_BindResponse
);
245 return NT_STATUS_NO_MEMORY
;
247 resp
= &reply
->msg
->r
.BindResponse
;
252 * TODO: a SASL bind with a different mechanism
253 * should cancel an inprogress SASL bind.
258 status
= ldapsrv_setup_gensec(conn
, req
->creds
.SASL
.mechanism
,
260 if (!NT_STATUS_IS_OK(status
)) {
261 DEBUG(1, ("Failed to start GENSEC server for [%s] code: %s\n",
262 ldb_binary_encode_string(call
, req
->creds
.SASL
.mechanism
),
264 result
= LDAP_OPERATIONS_ERROR
;
265 errstr
= talloc_asprintf(reply
, "SASL: Failed to start authentication system: %s",
270 if (NT_STATUS_IS_OK(status
)) {
271 DATA_BLOB input
= data_blob(NULL
, 0);
272 DATA_BLOB output
= data_blob(NULL
, 0);
274 if (req
->creds
.SASL
.secblob
) {
275 input
= *req
->creds
.SASL
.secblob
;
278 status
= gensec_update_ev(conn
->gensec
, reply
, conn
->connection
->event
.ctx
,
281 /* Windows 2000 mmc doesn't like secblob == NULL and reports a decoding error */
282 resp
->SASL
.secblob
= talloc(reply
, DATA_BLOB
);
283 NT_STATUS_HAVE_NO_MEMORY(resp
->SASL
.secblob
);
284 *resp
->SASL
.secblob
= output
;
286 resp
->SASL
.secblob
= NULL
;
289 if (NT_STATUS_EQUAL(NT_STATUS_MORE_PROCESSING_REQUIRED
, status
)) {
290 result
= LDAP_SASL_BIND_IN_PROGRESS
;
292 } else if (NT_STATUS_IS_OK(status
)) {
293 struct ldapsrv_sasl_postprocess_context
*context
= NULL
;
295 result
= LDAP_SUCCESS
;
298 if (gensec_have_feature(conn
->gensec
, GENSEC_FEATURE_SIGN
) ||
299 gensec_have_feature(conn
->gensec
, GENSEC_FEATURE_SEAL
)) {
301 context
= talloc(call
, struct ldapsrv_sasl_postprocess_context
);
304 status
= NT_STATUS_NO_MEMORY
;
308 if (context
&& conn
->sockets
.tls
) {
309 TALLOC_FREE(context
);
310 status
= NT_STATUS_NOT_SUPPORTED
;
311 result
= LDAP_UNWILLING_TO_PERFORM
;
312 errstr
= talloc_asprintf(reply
,
313 "SASL:[%s]: Sign or Seal are not allowed if TLS is used",
314 req
->creds
.SASL
.mechanism
);
317 if (context
&& conn
->sockets
.sasl
) {
318 TALLOC_FREE(context
);
319 status
= NT_STATUS_NOT_SUPPORTED
;
320 result
= LDAP_UNWILLING_TO_PERFORM
;
321 errstr
= talloc_asprintf(reply
,
322 "SASL:[%s]: Sign or Seal are not allowed if SASL encryption has already been set up",
323 req
->creds
.SASL
.mechanism
);
327 context
->conn
= conn
;
328 status
= gensec_create_tstream(context
,
329 context
->conn
->gensec
,
330 context
->conn
->sockets
.raw
,
332 if (NT_STATUS_IS_OK(status
)) {
333 if (!talloc_reference(context
->sasl
, conn
->gensec
)) {
334 status
= NT_STATUS_NO_MEMORY
;
338 switch (call
->conn
->require_strong_auth
) {
339 case LDAP_SERVER_REQUIRE_STRONG_AUTH_NO
:
341 case LDAP_SERVER_REQUIRE_STRONG_AUTH_ALLOW_SASL_OVER_TLS
:
342 if (call
->conn
->sockets
.active
== call
->conn
->sockets
.tls
) {
345 status
= NT_STATUS_NETWORK_ACCESS_DENIED
;
346 result
= LDAP_STRONG_AUTH_REQUIRED
;
347 errstr
= talloc_asprintf(reply
,
348 "SASL:[%s]: not allowed if TLS is used.",
349 req
->creds
.SASL
.mechanism
);
351 case LDAP_SERVER_REQUIRE_STRONG_AUTH_YES
:
352 status
= NT_STATUS_NETWORK_ACCESS_DENIED
;
353 result
= LDAP_STRONG_AUTH_REQUIRED
;
354 errstr
= talloc_asprintf(reply
,
355 "SASL:[%s]: Sign or Seal are required.",
356 req
->creds
.SASL
.mechanism
);
361 if (result
!= LDAP_SUCCESS
) {
362 } else if (!NT_STATUS_IS_OK(status
)) {
363 result
= LDAP_OPERATIONS_ERROR
;
364 errstr
= talloc_asprintf(reply
,
365 "SASL:[%s]: Failed to setup SASL socket: %s",
366 req
->creds
.SASL
.mechanism
, nt_errstr(status
));
368 struct auth_session_info
*old_session_info
=NULL
;
370 old_session_info
= conn
->session_info
;
371 conn
->session_info
= NULL
;
372 status
= gensec_session_info(conn
->gensec
, conn
, &conn
->session_info
);
373 if (!NT_STATUS_IS_OK(status
)) {
374 conn
->session_info
= old_session_info
;
375 result
= LDAP_OPERATIONS_ERROR
;
376 errstr
= talloc_asprintf(reply
,
377 "SASL:[%s]: Failed to get session info: %s",
378 req
->creds
.SASL
.mechanism
, nt_errstr(status
));
380 talloc_unlink(conn
, old_session_info
);
382 /* don't leak the old LDB */
383 talloc_unlink(conn
, conn
->ldb
);
385 call
->conn
->authz_logged
= true;
387 status
= ldapsrv_backend_Init(conn
);
389 if (!NT_STATUS_IS_OK(status
)) {
390 result
= LDAP_OPERATIONS_ERROR
;
391 errstr
= talloc_asprintf(reply
,
392 "SASL:[%s]: Failed to advise samdb of new credentials: %s",
393 req
->creds
.SASL
.mechanism
,
399 if (NT_STATUS_IS_OK(status
) && context
) {
400 call
->postprocess_send
= ldapsrv_sasl_postprocess_send
;
401 call
->postprocess_recv
= ldapsrv_sasl_postprocess_recv
;
402 call
->postprocess_private
= context
;
404 talloc_unlink(conn
, conn
->gensec
);
407 status
= nt_status_squash(status
);
409 result
= LDAP_INVALID_CREDENTIALS
;
410 errstr
= ldapsrv_bind_error_msg(reply
, HRES_SEC_E_LOGON_DENIED
,
413 talloc_unlink(conn
, conn
->gensec
);
417 resp
->response
.resultcode
= result
;
418 resp
->response
.dn
= NULL
;
419 resp
->response
.errormessage
= errstr
;
420 resp
->response
.referral
= NULL
;
422 ldapsrv_queue_reply(call
, reply
);
426 NTSTATUS
ldapsrv_BindRequest(struct ldapsrv_call
*call
)
428 struct ldap_BindRequest
*req
= &call
->request
->r
.BindRequest
;
429 struct ldapsrv_reply
*reply
;
430 struct ldap_BindResponse
*resp
;
432 if (call
->conn
->pending_calls
!= NULL
) {
433 reply
= ldapsrv_init_reply(call
, LDAP_TAG_BindResponse
);
435 return NT_STATUS_NO_MEMORY
;
438 resp
= &reply
->msg
->r
.BindResponse
;
439 resp
->response
.resultcode
= LDAP_BUSY
;
440 resp
->response
.dn
= NULL
;
441 resp
->response
.errormessage
= talloc_asprintf(reply
, "Pending requests on this LDAP session");
442 resp
->response
.referral
= NULL
;
443 resp
->SASL
.secblob
= NULL
;
445 ldapsrv_queue_reply(call
, reply
);
450 * TODO: a simple bind should cancel an
451 * inprogress SASL bind.
454 switch (req
->mechanism
) {
455 case LDAP_AUTH_MECH_SIMPLE
:
456 return ldapsrv_BindSimple(call
);
457 case LDAP_AUTH_MECH_SASL
:
458 return ldapsrv_BindSASL(call
);
461 reply
= ldapsrv_init_reply(call
, LDAP_TAG_BindResponse
);
463 return NT_STATUS_NO_MEMORY
;
466 resp
= &reply
->msg
->r
.BindResponse
;
467 resp
->response
.resultcode
= LDAP_AUTH_METHOD_NOT_SUPPORTED
;
468 resp
->response
.dn
= NULL
;
469 resp
->response
.errormessage
= talloc_asprintf(reply
, "Bad AuthenticationChoice [%d]", req
->mechanism
);
470 resp
->response
.referral
= NULL
;
471 resp
->SASL
.secblob
= NULL
;
473 ldapsrv_queue_reply(call
, reply
);
477 NTSTATUS
ldapsrv_UnbindRequest(struct ldapsrv_call
*call
)
479 DEBUG(10, ("UnbindRequest\n"));