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traffic_packets: provision request data for packet_drsuapi_13
[Samba.git] / source3 / smbd / smb2_sesssetup.c
blob5e1e8b4ec57956e4e805d5b3ade90cd18e7978ac
1 /*
2 Unix SMB/CIFS implementation.
3 Core SMB2 server
4
5 Copyright (C) Stefan Metzmacher 2009
6 Copyright (C) Jeremy Allison 2010
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "smbd/smbd.h"
24 #include "smbd/globals.h"
25 #include "../libcli/smb/smb_common.h"
26 #include "../auth/gensec/gensec.h"
27 #include "auth.h"
28 #include "../lib/tsocket/tsocket.h"
29 #include "../libcli/security/security.h"
30 #include "../lib/util/tevent_ntstatus.h"
31 #include "lib/crypto/sha512.h"
32 #include "lib/crypto/aes.h"
33 #include "lib/crypto/aes_ccm_128.h"
34 #include "lib/crypto/aes_gcm_128.h"
35
36 #undef DBGC_CLASS
37 #define DBGC_CLASS DBGC_SMB2
38
39 static struct tevent_req *smbd_smb2_session_setup_wrap_send(TALLOC_CTX *mem_ctx,
40 struct tevent_context *ev,
41 struct smbd_smb2_request *smb2req,
42 uint64_t in_session_id,
43 uint8_t in_flags,
44 uint8_t in_security_mode,
45 uint64_t in_previous_session_id,
46 DATA_BLOB in_security_buffer);
47 static NTSTATUS smbd_smb2_session_setup_wrap_recv(struct tevent_req *req,
48 uint16_t *out_session_flags,
49 TALLOC_CTX *mem_ctx,
50 DATA_BLOB *out_security_buffer,
51 uint64_t *out_session_id);
52
53 static void smbd_smb2_request_sesssetup_done(struct tevent_req *subreq);
54
55 NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *smb2req)
56 {
57 const uint8_t *inhdr;
58 const uint8_t *inbody;
59 uint64_t in_session_id;
60 uint8_t in_flags;
61 uint8_t in_security_mode;
62 uint64_t in_previous_session_id;
63 uint16_t in_security_offset;
64 uint16_t in_security_length;
65 DATA_BLOB in_security_buffer;
66 NTSTATUS status;
67 struct tevent_req *subreq;
68
69 status = smbd_smb2_request_verify_sizes(smb2req, 0x19);
70 if (!NT_STATUS_IS_OK(status)) {
71 return smbd_smb2_request_error(smb2req, status);
72 }
73 inhdr = SMBD_SMB2_IN_HDR_PTR(smb2req);
74 inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
75
76 in_session_id = BVAL(inhdr, SMB2_HDR_SESSION_ID);
77
78 in_flags = CVAL(inbody, 0x02);
79 in_security_mode = CVAL(inbody, 0x03);
80 /* Capabilities = IVAL(inbody, 0x04) */
81 /* Channel = IVAL(inbody, 0x08) */
82 in_security_offset = SVAL(inbody, 0x0C);
83 in_security_length = SVAL(inbody, 0x0E);
84 in_previous_session_id = BVAL(inbody, 0x10);
85
86 if (in_security_offset != (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req))) {
87 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
88 }
89
90 if (in_security_length > SMBD_SMB2_IN_DYN_LEN(smb2req)) {
91 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
92 }
93
94 in_security_buffer.data = SMBD_SMB2_IN_DYN_PTR(smb2req);
95 in_security_buffer.length = in_security_length;
96
97 subreq = smbd_smb2_session_setup_wrap_send(smb2req,
98 smb2req->sconn->ev_ctx,
99 smb2req,
100 in_session_id,
101 in_flags,
102 in_security_mode,
103 in_previous_session_id,
104 in_security_buffer);
105 if (subreq == NULL) {
106 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
107 }
108 tevent_req_set_callback(subreq, smbd_smb2_request_sesssetup_done, smb2req);
109
110 return smbd_smb2_request_pending_queue(smb2req, subreq, 500);
111 }
112
113 static void smbd_smb2_request_sesssetup_done(struct tevent_req *subreq)
114 {
115 struct smbd_smb2_request *smb2req =
116 tevent_req_callback_data(subreq,
117 struct smbd_smb2_request);
118 uint8_t *outhdr;
119 DATA_BLOB outbody;
120 DATA_BLOB outdyn;
121 uint16_t out_session_flags = 0;
122 uint64_t out_session_id = 0;
123 uint16_t out_security_offset;
124 DATA_BLOB out_security_buffer = data_blob_null;
125 NTSTATUS status;
126 NTSTATUS error; /* transport error */
127
128 status = smbd_smb2_session_setup_wrap_recv(subreq,
129 &out_session_flags,
130 smb2req,
131 &out_security_buffer,
132 &out_session_id);
133 TALLOC_FREE(subreq);
134 if (!NT_STATUS_IS_OK(status) &&
135 !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
136 status = nt_status_squash(status);
137 error = smbd_smb2_request_error(smb2req, status);
138 if (!NT_STATUS_IS_OK(error)) {
139 smbd_server_connection_terminate(smb2req->xconn,
140 nt_errstr(error));
141 return;
142 }
143 return;
144 }
145
146 out_security_offset = SMB2_HDR_BODY + 0x08;
147
148 outhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
149
150 outbody = smbd_smb2_generate_outbody(smb2req, 0x08);
151 if (outbody.data == NULL) {
152 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
153 if (!NT_STATUS_IS_OK(error)) {
154 smbd_server_connection_terminate(smb2req->xconn,
155 nt_errstr(error));
156 return;
157 }
158 return;
159 }
160
161 SBVAL(outhdr, SMB2_HDR_SESSION_ID, out_session_id);
162
163 SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */
164 SSVAL(outbody.data, 0x02,
165 out_session_flags); /* session flags */
166 SSVAL(outbody.data, 0x04,
167 out_security_offset); /* security buffer offset */
168 SSVAL(outbody.data, 0x06,
169 out_security_buffer.length); /* security buffer length */
170
171 outdyn = out_security_buffer;
172
173 error = smbd_smb2_request_done_ex(smb2req, status, outbody, &outdyn,
174 __location__);
175 if (!NT_STATUS_IS_OK(error)) {
176 smbd_server_connection_terminate(smb2req->xconn,
177 nt_errstr(error));
178 return;
179 }
180 }
181
182 static NTSTATUS smbd_smb2_auth_generic_return(struct smbXsrv_session *session,
183 struct smbXsrv_session_auth0 **_auth,
184 struct smbd_smb2_request *smb2req,
185 uint8_t in_security_mode,
186 struct auth_session_info *session_info,
187 uint16_t *out_session_flags,
188 uint64_t *out_session_id)
189 {
190 NTSTATUS status;
191 bool guest = false;
192 uint8_t session_key[16];
193 struct smbXsrv_session *x = session;
194 struct smbXsrv_session_auth0 *auth = *_auth;
195 struct smbXsrv_connection *xconn = smb2req->xconn;
196 size_t i;
197 struct _derivation {
198 DATA_BLOB label;
199 DATA_BLOB context;
200 };
201 struct {
202 struct _derivation signing;
203 struct _derivation encryption;
204 struct _derivation decryption;
205 struct _derivation application;
206 } derivation = { };
207
208 *_auth = NULL;
209
210 if (xconn->protocol >= PROTOCOL_SMB3_10) {
211 struct smbXsrv_preauth *preauth;
212 struct _derivation *d;
213 DATA_BLOB p;
214 struct hc_sha512state sctx;
215
216 preauth = talloc_move(smb2req, &auth->preauth);
217
218 samba_SHA512_Init(&sctx);
219 samba_SHA512_Update(&sctx, preauth->sha512_value,
220 sizeof(preauth->sha512_value));
221 for (i = 1; i < smb2req->in.vector_count; i++) {
222 samba_SHA512_Update(&sctx,
223 smb2req->in.vector[i].iov_base,
224 smb2req->in.vector[i].iov_len);
225 }
226 samba_SHA512_Final(preauth->sha512_value, &sctx);
227
228 p = data_blob_const(preauth->sha512_value,
229 sizeof(preauth->sha512_value));
230
231 d = &derivation.signing;
232 d->label = data_blob_string_const_null("SMBSigningKey");
233 d->context = p;
234
235 d = &derivation.decryption;
236 d->label = data_blob_string_const_null("SMBC2SCipherKey");
237 d->context = p;
238
239 d = &derivation.encryption;
240 d->label = data_blob_string_const_null("SMBS2CCipherKey");
241 d->context = p;
242
243 d = &derivation.application;
244 d->label = data_blob_string_const_null("SMBAppKey");
245 d->context = p;
246
247 } else if (xconn->protocol >= PROTOCOL_SMB2_24) {
248 struct _derivation *d;
249
250 d = &derivation.signing;
251 d->label = data_blob_string_const_null("SMB2AESCMAC");
252 d->context = data_blob_string_const_null("SmbSign");
253
254 d = &derivation.decryption;
255 d->label = data_blob_string_const_null("SMB2AESCCM");
256 d->context = data_blob_string_const_null("ServerIn ");
257
258 d = &derivation.encryption;
259 d->label = data_blob_string_const_null("SMB2AESCCM");
260 d->context = data_blob_string_const_null("ServerOut");
261
262 d = &derivation.application;
263 d->label = data_blob_string_const_null("SMB2APP");
264 d->context = data_blob_string_const_null("SmbRpc");
265 }
266
267 if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) ||
268 (xconn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
269 {
270 x->global->signing_flags = SMBXSRV_SIGNING_REQUIRED;
271 }
272
273 if ((lp_smb_encrypt(-1) >= SMB_SIGNING_DESIRED) &&
274 (xconn->smb2.client.capabilities & SMB2_CAP_ENCRYPTION)) {
275 x->global->encryption_flags = SMBXSRV_ENCRYPTION_DESIRED;
276 }
277
278 if (lp_smb_encrypt(-1) == SMB_SIGNING_REQUIRED) {
279 x->global->encryption_flags = SMBXSRV_ENCRYPTION_REQUIRED |
280 SMBXSRV_ENCRYPTION_DESIRED;
281 }
282
283 if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
284 if (security_session_user_level(session_info, NULL) == SECURITY_GUEST) {
285 *out_session_flags |= SMB2_SESSION_FLAG_IS_GUEST;
286 }
287 /* force no signing */
288 x->global->signing_flags &= ~SMBXSRV_SIGNING_REQUIRED;
289 /* we map anonymous to guest internally */
290 guest = true;
291 }
292
293 if (guest && (x->global->encryption_flags & SMBXSRV_ENCRYPTION_REQUIRED)) {
294 DEBUG(1,("reject guest session as encryption is required\n"));
295 return NT_STATUS_ACCESS_DENIED;
296 }
297
298 if (xconn->smb2.server.cipher == 0) {
299 if (x->global->encryption_flags & SMBXSRV_ENCRYPTION_REQUIRED) {
300 DEBUG(1,("reject session with dialect[0x%04X] "
301 "as encryption is required\n",
302 xconn->smb2.server.dialect));
303 return NT_STATUS_ACCESS_DENIED;
304 }
305 } else {
306 x->global->channels[0].encryption_cipher = xconn->smb2.server.cipher;
307 }
308
309 if (x->global->encryption_flags & SMBXSRV_ENCRYPTION_DESIRED) {
310 *out_session_flags |= SMB2_SESSION_FLAG_ENCRYPT_DATA;
311 }
312
313 ZERO_STRUCT(session_key);
314 memcpy(session_key, session_info->session_key.data,
315 MIN(session_info->session_key.length, sizeof(session_key)));
316
317 x->global->signing_key = data_blob_talloc(x->global,
318 session_key,
319 sizeof(session_key));
320 if (x->global->signing_key.data == NULL) {
321 ZERO_STRUCT(session_key);
322 return NT_STATUS_NO_MEMORY;
323 }
324
325 if (xconn->protocol >= PROTOCOL_SMB2_24) {
326 struct _derivation *d = &derivation.signing;
327
328 smb2_key_derivation(session_key, sizeof(session_key),
329 d->label.data, d->label.length,
330 d->context.data, d->context.length,
331 x->global->signing_key.data);
332 }
333
334 if (xconn->protocol >= PROTOCOL_SMB2_24) {
335 struct _derivation *d = &derivation.decryption;
336
337 x->global->decryption_key = data_blob_talloc(x->global,
338 session_key,
339 sizeof(session_key));
340 if (x->global->decryption_key.data == NULL) {
341 ZERO_STRUCT(session_key);
342 return NT_STATUS_NO_MEMORY;
343 }
344
345 smb2_key_derivation(session_key, sizeof(session_key),
346 d->label.data, d->label.length,
347 d->context.data, d->context.length,
348 x->global->decryption_key.data);
349 }
350
351 if (xconn->protocol >= PROTOCOL_SMB2_24) {
352 struct _derivation *d = &derivation.encryption;
353 size_t nonce_size;
354
355 x->global->encryption_key = data_blob_talloc(x->global,
356 session_key,
357 sizeof(session_key));
358 if (x->global->encryption_key.data == NULL) {
359 ZERO_STRUCT(session_key);
360 return NT_STATUS_NO_MEMORY;
361 }
362
363 smb2_key_derivation(session_key, sizeof(session_key),
364 d->label.data, d->label.length,
365 d->context.data, d->context.length,
366 x->global->encryption_key.data);
367
368 /*
369 * CCM and GCM algorithms must never have their
370 * nonce wrap, or the security of the whole
371 * communication and the keys is destroyed.
372 * We must drop the connection once we have
373 * transfered too much data.
374 *
375 * NOTE: We assume nonces greater than 8 bytes.
376 */
377 generate_random_buffer((uint8_t *)&x->nonce_high_random,
378 sizeof(x->nonce_high_random));
379 switch (xconn->smb2.server.cipher) {
380 case SMB2_ENCRYPTION_AES128_CCM:
381 nonce_size = AES_CCM_128_NONCE_SIZE;
382 break;
383 case SMB2_ENCRYPTION_AES128_GCM:
384 nonce_size = AES_GCM_128_IV_SIZE;
385 break;
386 default:
387 nonce_size = 0;
388 break;
389 }
390 x->nonce_high_max = SMB2_NONCE_HIGH_MAX(nonce_size);
391 x->nonce_high = 0;
392 x->nonce_low = 0;
393 }
394
395 x->global->application_key = data_blob_dup_talloc(x->global,
396 x->global->signing_key);
397 if (x->global->application_key.data == NULL) {
398 ZERO_STRUCT(session_key);
399 return NT_STATUS_NO_MEMORY;
400 }
401
402 if (xconn->protocol >= PROTOCOL_SMB2_24) {
403 struct _derivation *d = &derivation.application;
404
405 smb2_key_derivation(session_key, sizeof(session_key),
406 d->label.data, d->label.length,
407 d->context.data, d->context.length,
408 x->global->application_key.data);
409 }
410 ZERO_STRUCT(session_key);
411
412 x->global->channels[0].signing_key = data_blob_dup_talloc(x->global->channels,
413 x->global->signing_key);
414 if (x->global->channels[0].signing_key.data == NULL) {
415 return NT_STATUS_NO_MEMORY;
416 }
417
418 data_blob_clear_free(&session_info->session_key);
419 session_info->session_key = data_blob_dup_talloc(session_info,
420 x->global->application_key);
421 if (session_info->session_key.data == NULL) {
422 return NT_STATUS_NO_MEMORY;
423 }
424
425 session->compat = talloc_zero(session, struct user_struct);
426 if (session->compat == NULL) {
427 return NT_STATUS_NO_MEMORY;
428 }
429 session->compat->session = session;
430 session->compat->homes_snum = -1;
431 session->compat->session_info = session_info;
432 session->compat->session_keystr = NULL;
433 session->compat->vuid = session->global->session_wire_id;
434 DLIST_ADD(smb2req->sconn->users, session->compat);
435 smb2req->sconn->num_users++;
436
437 if (security_session_user_level(session_info, NULL) >= SECURITY_USER) {
438 session->compat->homes_snum =
439 register_homes_share(session_info->unix_info->unix_name);
440 }
441
442 set_current_user_info(session_info->unix_info->sanitized_username,
443 session_info->unix_info->unix_name,
444 session_info->info->domain_name);
445
446 reload_services(smb2req->sconn, conn_snum_used, true);
447
448 session->status = NT_STATUS_OK;
449 session->global->auth_session_info = talloc_move(session->global,
450 &session_info);
451 session->global->auth_session_info_seqnum += 1;
452 for (i=0; i < session->global->num_channels; i++) {
453 struct smbXsrv_channel_global0 *_c =
454 &session->global->channels[i];
455
456 _c->auth_session_info_seqnum =
457 session->global->auth_session_info_seqnum;
458 }
459 session->global->auth_time = timeval_to_nttime(&smb2req->request_time);
460 session->global->expiration_time = gensec_expire_time(auth->gensec);
461
462 if (!session_claim(session)) {
463 DEBUG(1, ("smb2: Failed to claim session "
464 "for vuid=%llu\n",
465 (unsigned long long)session->compat->vuid));
466 return NT_STATUS_LOGON_FAILURE;
467 }
468
469 TALLOC_FREE(auth);
470 status = smbXsrv_session_update(session);
471 if (!NT_STATUS_IS_OK(status)) {
472 DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n",
473 (unsigned long long)session->compat->vuid,
474 nt_errstr(status)));
475 return NT_STATUS_LOGON_FAILURE;
476 }
477
478 /*
479 * we attach the session to the request
480 * so that the response can be signed
481 */
482 if (!guest) {
483 smb2req->do_signing = true;
484 }
485
486 global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32);
487
488 *out_session_id = session->global->session_wire_id;
489 smb2req->last_session_id = session->global->session_wire_id;
490
491 return NT_STATUS_OK;
492 }
493
494 static NTSTATUS smbd_smb2_reauth_generic_return(struct smbXsrv_session *session,
495 struct smbXsrv_session_auth0 **_auth,
496 struct smbd_smb2_request *smb2req,
497 struct auth_session_info *session_info,
498 uint16_t *out_session_flags,
499 uint64_t *out_session_id)
500 {
501 NTSTATUS status;
502 struct smbXsrv_session *x = session;
503 struct smbXsrv_session_auth0 *auth = *_auth;
504 struct smbXsrv_connection *xconn = smb2req->xconn;
505 size_t i;
506
507 *_auth = NULL;
508
509 data_blob_clear_free(&session_info->session_key);
510 session_info->session_key = data_blob_dup_talloc(session_info,
511 x->global->application_key);
512 if (session_info->session_key.data == NULL) {
513 return NT_STATUS_NO_MEMORY;
514 }
515
516 session->compat->session_info = session_info;
517 session->compat->vuid = session->global->session_wire_id;
518
519 session->compat->homes_snum =
520 register_homes_share(session_info->unix_info->unix_name);
521
522 set_current_user_info(session_info->unix_info->sanitized_username,
523 session_info->unix_info->unix_name,
524 session_info->info->domain_name);
525
526 reload_services(smb2req->sconn, conn_snum_used, true);
527
528 session->status = NT_STATUS_OK;
529 TALLOC_FREE(session->global->auth_session_info);
530 session->global->auth_session_info = talloc_move(session->global,
531 &session_info);
532 session->global->auth_session_info_seqnum += 1;
533 for (i=0; i < session->global->num_channels; i++) {
534 struct smbXsrv_channel_global0 *_c =
535 &session->global->channels[i];
536
537 _c->auth_session_info_seqnum =
538 session->global->auth_session_info_seqnum;
539 }
540 session->global->auth_time = timeval_to_nttime(&smb2req->request_time);
541 session->global->expiration_time = gensec_expire_time(auth->gensec);
542
543 TALLOC_FREE(auth);
544 status = smbXsrv_session_update(session);
545 if (!NT_STATUS_IS_OK(status)) {
546 DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n",
547 (unsigned long long)session->compat->vuid,
548 nt_errstr(status)));
549 return NT_STATUS_LOGON_FAILURE;
550 }
551
552 conn_clear_vuid_caches(xconn->client->sconn, session->compat->vuid);
553
554 if (security_session_user_level(session_info, NULL) >= SECURITY_USER) {
555 smb2req->do_signing = true;
556 }
557
558 *out_session_id = session->global->session_wire_id;
559
560 return NT_STATUS_OK;
561 }
562
563 static NTSTATUS smbd_smb2_bind_auth_return(struct smbXsrv_session *session,
564 struct smbXsrv_session_auth0 **_auth,
565 struct smbd_smb2_request *smb2req,
566 struct auth_session_info *session_info,
567 uint16_t *out_session_flags,
568 uint64_t *out_session_id)
569 {
570 NTSTATUS status;
571 struct smbXsrv_session *x = session;
572 struct smbXsrv_session_auth0 *auth = *_auth;
573 struct smbXsrv_connection *xconn = smb2req->xconn;
574 struct smbXsrv_channel_global0 *c = NULL;
575 uint8_t session_key[16];
576 size_t i;
577 struct _derivation {
578 DATA_BLOB label;
579 DATA_BLOB context;
580 };
581 struct {
582 struct _derivation signing;
583 } derivation = { };
584 bool ok;
585
586 *_auth = NULL;
587
588 if (xconn->protocol >= PROTOCOL_SMB3_10) {
589 struct smbXsrv_preauth *preauth;
590 struct _derivation *d;
591 DATA_BLOB p;
592 struct hc_sha512state sctx;
593
594 preauth = talloc_move(smb2req, &auth->preauth);
595
596 samba_SHA512_Init(&sctx);
597 samba_SHA512_Update(&sctx, preauth->sha512_value,
598 sizeof(preauth->sha512_value));
599 for (i = 1; i < smb2req->in.vector_count; i++) {
600 samba_SHA512_Update(&sctx,
601 smb2req->in.vector[i].iov_base,
602 smb2req->in.vector[i].iov_len);
603 }
604 samba_SHA512_Final(preauth->sha512_value, &sctx);
605
606 p = data_blob_const(preauth->sha512_value,
607 sizeof(preauth->sha512_value));
608
609 d = &derivation.signing;
610 d->label = data_blob_string_const_null("SMBSigningKey");
611 d->context = p;
612
613 } else if (xconn->protocol >= PROTOCOL_SMB2_24) {
614 struct _derivation *d;
615
616 d = &derivation.signing;
617 d->label = data_blob_string_const_null("SMB2AESCMAC");
618 d->context = data_blob_string_const_null("SmbSign");
619 }
620
621 status = smbXsrv_session_find_channel(session, xconn, &c);
622 if (!NT_STATUS_IS_OK(status)) {
623 return status;
624 }
625
626 ok = security_token_is_sid(session_info->security_token,
627 &x->global->auth_session_info->security_token->sids[0]);
628 if (!ok) {
629 return NT_STATUS_NOT_SUPPORTED;
630 }
631
632 if (session_info->session_key.length == 0) {
633 /* See [MS-SMB2] 3.3.5.2.4 for the return code. */
634 return NT_STATUS_NOT_SUPPORTED;
635 }
636
637 ZERO_STRUCT(session_key);
638 memcpy(session_key, session_info->session_key.data,
639 MIN(session_info->session_key.length, sizeof(session_key)));
640
641 c->signing_key = data_blob_talloc(x->global,
642 session_key,
643 sizeof(session_key));
644 if (c->signing_key.data == NULL) {
645 ZERO_STRUCT(session_key);
646 return NT_STATUS_NO_MEMORY;
647 }
648
649 if (xconn->protocol >= PROTOCOL_SMB2_24) {
650 struct _derivation *d = &derivation.signing;
651
652 smb2_key_derivation(session_key, sizeof(session_key),
653 d->label.data, d->label.length,
654 d->context.data, d->context.length,
655 c->signing_key.data);
656 }
657 ZERO_STRUCT(session_key);
658
659 TALLOC_FREE(auth);
660 status = smbXsrv_session_update(session);
661 if (!NT_STATUS_IS_OK(status)) {
662 DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n",
663 (unsigned long long)session->compat->vuid,
664 nt_errstr(status)));
665 return NT_STATUS_LOGON_FAILURE;
666 }
667
668 *out_session_id = session->global->session_wire_id;
669
670 return NT_STATUS_OK;
671 }
672
673 struct smbd_smb2_session_setup_state {
674 struct tevent_context *ev;
675 struct smbd_smb2_request *smb2req;
676 uint64_t in_session_id;
677 uint8_t in_flags;
678 uint8_t in_security_mode;
679 uint64_t in_previous_session_id;
680 DATA_BLOB in_security_buffer;
681 struct smbXsrv_session *session;
682 struct smbXsrv_session_auth0 *auth;
683 struct auth_session_info *session_info;
684 uint16_t out_session_flags;
685 DATA_BLOB out_security_buffer;
686 uint64_t out_session_id;
687 };
688
689 static void smbd_smb2_session_setup_gensec_done(struct tevent_req *subreq);
690 static void smbd_smb2_session_setup_previous_done(struct tevent_req *subreq);
691 static void smbd_smb2_session_setup_auth_return(struct tevent_req *req);
692
693 static struct tevent_req *smbd_smb2_session_setup_send(TALLOC_CTX *mem_ctx,
694 struct tevent_context *ev,
695 struct smbd_smb2_request *smb2req,
696 uint64_t in_session_id,
697 uint8_t in_flags,
698 uint8_t in_security_mode,
699 uint64_t in_previous_session_id,
700 DATA_BLOB in_security_buffer)
701 {
702 struct tevent_req *req;
703 struct smbd_smb2_session_setup_state *state;
704 NTSTATUS status;
705 NTTIME now = timeval_to_nttime(&smb2req->request_time);
706 struct tevent_req *subreq;
707 struct smbXsrv_channel_global0 *c = NULL;
708 enum security_user_level seclvl;
709
710 req = tevent_req_create(mem_ctx, &state,
711 struct smbd_smb2_session_setup_state);
712 if (req == NULL) {
713 return NULL;
714 }
715 state->ev = ev;
716 state->smb2req = smb2req;
717 state->in_session_id = in_session_id;
718 state->in_flags = in_flags;
719 state->in_security_mode = in_security_mode;
720 state->in_previous_session_id = in_previous_session_id;
721 state->in_security_buffer = in_security_buffer;
722
723 if (in_flags & SMB2_SESSION_FLAG_BINDING) {
724 if (smb2req->xconn->protocol < PROTOCOL_SMB2_22) {
725 tevent_req_nterror(req, NT_STATUS_REQUEST_NOT_ACCEPTED);
726 return tevent_req_post(req, ev);
727 }
728
729 if (!smb2req->xconn->client->server_multi_channel_enabled) {
730 tevent_req_nterror(req, NT_STATUS_REQUEST_NOT_ACCEPTED);
731 return tevent_req_post(req, ev);
732 }
733
734 if (in_session_id == 0) {
735 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
736 return tevent_req_post(req, ev);
737 }
738
739 if (smb2req->session == NULL) {
740 tevent_req_nterror(req, NT_STATUS_USER_SESSION_DELETED);
741 return tevent_req_post(req, ev);
742 }
743
744 if (!smb2req->do_signing) {
745 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
746 return tevent_req_post(req, ev);
747 }
748
749 status = smbXsrv_session_find_channel(smb2req->session,
750 smb2req->xconn,
751 &c);
752 if (NT_STATUS_IS_OK(status)) {
753 if (c->signing_key.length == 0) {
754 goto auth;
755 }
756 tevent_req_nterror(req, NT_STATUS_REQUEST_NOT_ACCEPTED);
757 return tevent_req_post(req, ev);
758 }
759
760 /*
761 * OLD: 3.00 NEW 3.02 => INVALID_PARAMETER
762 * OLD: 3.02 NEW 3.00 => INVALID_PARAMETER
763 * OLD: 2.10 NEW 3.02 => ACCESS_DENIED
764 * OLD: 3.02 NEW 2.10 => ACCESS_DENIED
765 */
766 if (smb2req->session->global->connection_dialect
767 < SMB2_DIALECT_REVISION_222)
768 {
769 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
770 return tevent_req_post(req, ev);
771 }
772 if (smb2req->xconn->smb2.server.dialect
773 < SMB2_DIALECT_REVISION_222)
774 {
775 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
776 return tevent_req_post(req, ev);
777 }
778 if (smb2req->session->global->connection_dialect
779 != smb2req->xconn->smb2.server.dialect)
780 {
781 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
782 return tevent_req_post(req, ev);
783 }
784
785 seclvl = security_session_user_level(
786 smb2req->session->global->auth_session_info,
787 NULL);
788 if (seclvl < SECURITY_USER) {
789 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
790 return tevent_req_post(req, ev);
791 }
792
793 status = smbXsrv_session_add_channel(smb2req->session,
794 smb2req->xconn,
795 &c);
796 if (!NT_STATUS_IS_OK(status)) {
797 tevent_req_nterror(req, status);
798 return tevent_req_post(req, ev);
799 }
800
801 status = smbXsrv_session_update(smb2req->session);
802 if (!NT_STATUS_IS_OK(status)) {
803 tevent_req_nterror(req, status);
804 return tevent_req_post(req, ev);
805 }
806 }
807
808 auth:
809
810 if (state->in_session_id == 0) {
811 /* create a new session */
812 status = smbXsrv_session_create(state->smb2req->xconn,
813 now, &state->session);
814 if (tevent_req_nterror(req, status)) {
815 return tevent_req_post(req, ev);
816 }
817 smb2req->session = state->session;
818 } else {
819 if (smb2req->session == NULL) {
820 tevent_req_nterror(req, NT_STATUS_USER_SESSION_DELETED);
821 return tevent_req_post(req, ev);
822 }
823
824 state->session = smb2req->session;
825 status = state->session->status;
826 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED)) {
827 status = NT_STATUS_OK;
828 }
829 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
830 status = NT_STATUS_OK;
831 }
832 if (tevent_req_nterror(req, status)) {
833 return tevent_req_post(req, ev);
834 }
835 if (!(in_flags & SMB2_SESSION_FLAG_BINDING)) {
836 state->session->status = NT_STATUS_MORE_PROCESSING_REQUIRED;
837 }
838 }
839
840 status = smbXsrv_session_find_channel(smb2req->session,
841 smb2req->xconn, &c);
842 if (!NT_STATUS_IS_OK(status)) {
843 tevent_req_nterror(req, status);
844 return tevent_req_post(req, ev);
845 }
846
847 status = smbXsrv_session_find_auth(state->session, smb2req->xconn,
848 now, &state->auth);
849 if (!NT_STATUS_IS_OK(status)) {
850 status = smbXsrv_session_create_auth(state->session,
851 smb2req->xconn, now,
852 in_flags, in_security_mode,
853 &state->auth);
854 if (tevent_req_nterror(req, status)) {
855 return tevent_req_post(req, ev);
856 }
857 }
858
859 if (state->auth->gensec == NULL) {
860 status = auth_generic_prepare(state->auth,
861 state->smb2req->xconn->remote_address,
862 state->smb2req->xconn->local_address,
863 "SMB2",
864 &state->auth->gensec);
865 if (tevent_req_nterror(req, status)) {
866 return tevent_req_post(req, ev);
867 }
868
869 gensec_want_feature(state->auth->gensec, GENSEC_FEATURE_SESSION_KEY);
870 gensec_want_feature(state->auth->gensec, GENSEC_FEATURE_UNIX_TOKEN);
871 gensec_want_feature(state->auth->gensec, GENSEC_FEATURE_SMB_TRANSPORT);
872
873 status = gensec_start_mech_by_oid(state->auth->gensec,
874 GENSEC_OID_SPNEGO);
875 if (tevent_req_nterror(req, status)) {
876 return tevent_req_post(req, ev);
877 }
878 }
879
880 status = smbXsrv_session_update(state->session);
881 if (tevent_req_nterror(req, status)) {
882 return tevent_req_post(req, ev);
883 }
884
885 become_root();
886 subreq = gensec_update_send(state, state->ev,
887 state->auth->gensec,
888 state->in_security_buffer);
889 unbecome_root();
890 if (tevent_req_nomem(subreq, req)) {
891 return tevent_req_post(req, ev);
892 }
893 tevent_req_set_callback(subreq, smbd_smb2_session_setup_gensec_done, req);
894
895 return req;
896 }
897
898 static void smbd_smb2_session_setup_gensec_done(struct tevent_req *subreq)
899 {
900 struct tevent_req *req =
901 tevent_req_callback_data(subreq,
902 struct tevent_req);
903 struct smbd_smb2_session_setup_state *state =
904 tevent_req_data(req,
905 struct smbd_smb2_session_setup_state);
906 NTSTATUS status;
907
908 become_root();
909 status = gensec_update_recv(subreq, state,
910 &state->out_security_buffer);
911 unbecome_root();
912 TALLOC_FREE(subreq);
913 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) &&
914 !NT_STATUS_IS_OK(status)) {
915 tevent_req_nterror(req, status);
916 return;
917 }
918
919 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
920 state->out_session_id = state->session->global->session_wire_id;
921 state->smb2req->preauth = state->auth->preauth;
922 tevent_req_nterror(req, status);
923 return;
924 }
925
926 status = gensec_session_info(state->auth->gensec,
927 state,
928 &state->session_info);
929 if (tevent_req_nterror(req, status)) {
930 return;
931 }
932
933 if ((state->in_previous_session_id != 0) &&
934 (state->session->global->session_wire_id !=
935 state->in_previous_session_id))
936 {
937 subreq = smb2srv_session_close_previous_send(state, state->ev,
938 state->smb2req->xconn,
939 state->session_info,
940 state->in_previous_session_id,
941 state->session->global->session_wire_id);
942 if (tevent_req_nomem(subreq, req)) {
943 return;
944 }
945 tevent_req_set_callback(subreq,
946 smbd_smb2_session_setup_previous_done,
947 req);
948 return;
949 }
950
951 smbd_smb2_session_setup_auth_return(req);
952 }
953
954 static void smbd_smb2_session_setup_previous_done(struct tevent_req *subreq)
955 {
956 struct tevent_req *req =
957 tevent_req_callback_data(subreq,
958 struct tevent_req);
959 NTSTATUS status;
960
961 status = smb2srv_session_close_previous_recv(subreq);
962 TALLOC_FREE(subreq);
963 if (tevent_req_nterror(req, status)) {
964 return;
965 }
966
967 smbd_smb2_session_setup_auth_return(req);
968 }
969
970 static void smbd_smb2_session_setup_auth_return(struct tevent_req *req)
971 {
972 struct smbd_smb2_session_setup_state *state =
973 tevent_req_data(req,
974 struct smbd_smb2_session_setup_state);
975 NTSTATUS status;
976
977 if (state->in_flags & SMB2_SESSION_FLAG_BINDING) {
978 status = smbd_smb2_bind_auth_return(state->session,
979 &state->auth,
980 state->smb2req,
981 state->session_info,
982 &state->out_session_flags,
983 &state->out_session_id);
984 if (tevent_req_nterror(req, status)) {
985 return;
986 }
987 tevent_req_done(req);
988 return;
989 }
990
991 if (state->session->global->auth_session_info != NULL) {
992 status = smbd_smb2_reauth_generic_return(state->session,
993 &state->auth,
994 state->smb2req,
995 state->session_info,
996 &state->out_session_flags,
997 &state->out_session_id);
998 if (tevent_req_nterror(req, status)) {
999 return;
1000 }
1001 tevent_req_done(req);
1002 return;
1003 }
1004
1005 status = smbd_smb2_auth_generic_return(state->session,
1006 &state->auth,
1007 state->smb2req,
1008 state->in_security_mode,
1009 state->session_info,
1010 &state->out_session_flags,
1011 &state->out_session_id);
1012 if (tevent_req_nterror(req, status)) {
1013 return;
1014 }
1015
1016 tevent_req_done(req);
1017 return;
1018 }
1019
1020 static NTSTATUS smbd_smb2_session_setup_recv(struct tevent_req *req,
1021 uint16_t *out_session_flags,
1022 TALLOC_CTX *mem_ctx,
1023 DATA_BLOB *out_security_buffer,
1024 uint64_t *out_session_id)
1025 {
1026 struct smbd_smb2_session_setup_state *state =
1027 tevent_req_data(req,
1028 struct smbd_smb2_session_setup_state);
1029 NTSTATUS status;
1030
1031 if (tevent_req_is_nterror(req, &status)) {
1032 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1033 tevent_req_received(req);
1034 return nt_status_squash(status);
1035 }
1036 } else {
1037 status = NT_STATUS_OK;
1038 }
1039
1040 *out_session_flags = state->out_session_flags;
1041 *out_security_buffer = state->out_security_buffer;
1042 *out_session_id = state->out_session_id;
1043
1044 talloc_steal(mem_ctx, out_security_buffer->data);
1045 tevent_req_received(req);
1046 return status;
1047 }
1048
1049 struct smbd_smb2_session_setup_wrap_state {
1050 struct tevent_context *ev;
1051 struct smbd_smb2_request *smb2req;
1052 uint64_t in_session_id;
1053 uint8_t in_flags;
1054 uint8_t in_security_mode;
1055 uint64_t in_previous_session_id;
1056 DATA_BLOB in_security_buffer;
1057 uint16_t out_session_flags;
1058 DATA_BLOB out_security_buffer;
1059 uint64_t out_session_id;
1060 NTSTATUS error;
1061 };
1062
1063 static void smbd_smb2_session_setup_wrap_setup_done(struct tevent_req *subreq);
1064 static void smbd_smb2_session_setup_wrap_shutdown_done(struct tevent_req *subreq);
1065
1066 static struct tevent_req *smbd_smb2_session_setup_wrap_send(TALLOC_CTX *mem_ctx,
1067 struct tevent_context *ev,
1068 struct smbd_smb2_request *smb2req,
1069 uint64_t in_session_id,
1070 uint8_t in_flags,
1071 uint8_t in_security_mode,
1072 uint64_t in_previous_session_id,
1073 DATA_BLOB in_security_buffer)
1074 {
1075 struct tevent_req *req;
1076 struct smbd_smb2_session_setup_wrap_state *state;
1077 struct tevent_req *subreq;
1078
1079 req = tevent_req_create(mem_ctx, &state,
1080 struct smbd_smb2_session_setup_wrap_state);
1081 if (req == NULL) {
1082 return NULL;
1083 }
1084 state->ev = ev;
1085 state->smb2req = smb2req;
1086 state->in_session_id = in_session_id;
1087 state->in_flags = in_flags;
1088 state->in_security_mode = in_security_mode;
1089 state->in_previous_session_id = in_previous_session_id;
1090 state->in_security_buffer = in_security_buffer;
1091
1092 subreq = smbd_smb2_session_setup_send(state, state->ev,
1093 state->smb2req,
1094 state->in_session_id,
1095 state->in_flags,
1096 state->in_security_mode,
1097 state->in_previous_session_id,
1098 state->in_security_buffer);
1099 if (tevent_req_nomem(subreq, req)) {
1100 return tevent_req_post(req, ev);
1101 }
1102 tevent_req_set_callback(subreq,
1103 smbd_smb2_session_setup_wrap_setup_done, req);
1104
1105 return req;
1106 }
1107
1108 static void smbd_smb2_session_setup_wrap_setup_done(struct tevent_req *subreq)
1109 {
1110 struct tevent_req *req =
1111 tevent_req_callback_data(subreq,
1112 struct tevent_req);
1113 struct smbd_smb2_session_setup_wrap_state *state =
1114 tevent_req_data(req,
1115 struct smbd_smb2_session_setup_wrap_state);
1116 NTSTATUS status;
1117
1118 status = smbd_smb2_session_setup_recv(subreq,
1119 &state->out_session_flags,
1120 state,
1121 &state->out_security_buffer,
1122 &state->out_session_id);
1123 TALLOC_FREE(subreq);
1124 if (NT_STATUS_IS_OK(status)) {
1125 tevent_req_done(req);
1126 return;
1127 }
1128 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1129 tevent_req_nterror(req, status);
1130 return;
1131 }
1132
1133 if (state->smb2req->session == NULL) {
1134 tevent_req_nterror(req, status);
1135 return;
1136 }
1137
1138 state->error = status;
1139
1140 subreq = smb2srv_session_shutdown_send(state, state->ev,
1141 state->smb2req->session,
1142 state->smb2req);
1143 if (tevent_req_nomem(subreq, req)) {
1144 return;
1145 }
1146 tevent_req_set_callback(subreq,
1147 smbd_smb2_session_setup_wrap_shutdown_done,
1148 req);
1149 }
1150
1151 static void smbd_smb2_session_setup_wrap_shutdown_done(struct tevent_req *subreq)
1152 {
1153 struct tevent_req *req =
1154 tevent_req_callback_data(subreq,
1155 struct tevent_req);
1156 struct smbd_smb2_session_setup_wrap_state *state =
1157 tevent_req_data(req,
1158 struct smbd_smb2_session_setup_wrap_state);
1159 NTSTATUS status;
1160
1161 status = smb2srv_session_shutdown_recv(subreq);
1162 TALLOC_FREE(subreq);
1163 if (tevent_req_nterror(req, status)) {
1164 return;
1165 }
1166
1167 /*
1168 * we may need to sign the response, so we need to keep
1169 * the session until the response is sent to the wire.
1170 */
1171 talloc_steal(state->smb2req, state->smb2req->session);
1172
1173 tevent_req_nterror(req, state->error);
1174 }
1175
1176 static NTSTATUS smbd_smb2_session_setup_wrap_recv(struct tevent_req *req,
1177 uint16_t *out_session_flags,
1178 TALLOC_CTX *mem_ctx,
1179 DATA_BLOB *out_security_buffer,
1180 uint64_t *out_session_id)
1181 {
1182 struct smbd_smb2_session_setup_wrap_state *state =
1183 tevent_req_data(req,
1184 struct smbd_smb2_session_setup_wrap_state);
1185 NTSTATUS status;
1186
1187 if (tevent_req_is_nterror(req, &status)) {
1188 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1189 tevent_req_received(req);
1190 return nt_status_squash(status);
1191 }
1192 } else {
1193 status = NT_STATUS_OK;
1194 }
1195
1196 *out_session_flags = state->out_session_flags;
1197 *out_security_buffer = state->out_security_buffer;
1198 *out_session_id = state->out_session_id;
1199
1200 talloc_steal(mem_ctx, out_security_buffer->data);
1201 tevent_req_received(req);
1202 return status;
1203 }
1204
1205 static struct tevent_req *smbd_smb2_logoff_send(TALLOC_CTX *mem_ctx,
1206 struct tevent_context *ev,
1207 struct smbd_smb2_request *smb2req);
1208 static NTSTATUS smbd_smb2_logoff_recv(struct tevent_req *req);
1209 static void smbd_smb2_request_logoff_done(struct tevent_req *subreq);
1210
1211 NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req)
1212 {
1213 NTSTATUS status;
1214 struct tevent_req *subreq = NULL;
1215
1216 status = smbd_smb2_request_verify_sizes(req, 0x04);
1217 if (!NT_STATUS_IS_OK(status)) {
1218 return smbd_smb2_request_error(req, status);
1219 }
1220
1221 subreq = smbd_smb2_logoff_send(req, req->sconn->ev_ctx, req);
1222 if (subreq == NULL) {
1223 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
1224 }
1225 tevent_req_set_callback(subreq, smbd_smb2_request_logoff_done, req);
1226
1227 /*
1228 * Wait a long time before going async on this to allow
1229 * requests we're waiting on to finish. Set timeout to 10 secs.
1230 */
1231 return smbd_smb2_request_pending_queue(req, subreq, 10000000);
1232 }
1233
1234 static void smbd_smb2_request_logoff_done(struct tevent_req *subreq)
1235 {
1236 struct smbd_smb2_request *smb2req =
1237 tevent_req_callback_data(subreq,
1238 struct smbd_smb2_request);
1239 DATA_BLOB outbody;
1240 NTSTATUS status;
1241 NTSTATUS error;
1242
1243 status = smbd_smb2_logoff_recv(subreq);
1244 TALLOC_FREE(subreq);
1245 if (!NT_STATUS_IS_OK(status)) {
1246 error = smbd_smb2_request_error(smb2req, status);
1247 if (!NT_STATUS_IS_OK(error)) {
1248 smbd_server_connection_terminate(smb2req->xconn,
1249 nt_errstr(error));
1250 return;
1251 }
1252 return;
1253 }
1254
1255 outbody = smbd_smb2_generate_outbody(smb2req, 0x04);
1256 if (outbody.data == NULL) {
1257 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
1258 if (!NT_STATUS_IS_OK(error)) {
1259 smbd_server_connection_terminate(smb2req->xconn,
1260 nt_errstr(error));
1261 return;
1262 }
1263 return;
1264 }
1265
1266 SSVAL(outbody.data, 0x00, 0x04); /* struct size */
1267 SSVAL(outbody.data, 0x02, 0); /* reserved */
1268
1269 error = smbd_smb2_request_done(smb2req, outbody, NULL);
1270 if (!NT_STATUS_IS_OK(error)) {
1271 smbd_server_connection_terminate(smb2req->xconn,
1272 nt_errstr(error));
1273 return;
1274 }
1275 }
1276
1277 struct smbd_smb2_logoff_state {
1278 struct smbd_smb2_request *smb2req;
1279 };
1280
1281 static void smbd_smb2_logoff_shutdown_done(struct tevent_req *subreq);
1282
1283 static struct tevent_req *smbd_smb2_logoff_send(TALLOC_CTX *mem_ctx,
1284 struct tevent_context *ev,
1285 struct smbd_smb2_request *smb2req)
1286 {
1287 struct tevent_req *req;
1288 struct smbd_smb2_logoff_state *state;
1289 struct tevent_req *subreq;
1290
1291 req = tevent_req_create(mem_ctx, &state,
1292 struct smbd_smb2_logoff_state);
1293 if (req == NULL) {
1294 return NULL;
1295 }
1296 state->smb2req = smb2req;
1297
1298 subreq = smb2srv_session_shutdown_send(state, ev,
1299 smb2req->session,
1300 smb2req);
1301 if (tevent_req_nomem(subreq, req)) {
1302 return tevent_req_post(req, ev);
1303 }
1304 tevent_req_set_callback(subreq, smbd_smb2_logoff_shutdown_done, req);
1305
1306 return req;
1307 }
1308
1309 static void smbd_smb2_logoff_shutdown_done(struct tevent_req *subreq)
1310 {
1311 struct tevent_req *req = tevent_req_callback_data(
1312 subreq, struct tevent_req);
1313 struct smbd_smb2_logoff_state *state = tevent_req_data(
1314 req, struct smbd_smb2_logoff_state);
1315 NTSTATUS status;
1316 bool ok;
1317 const struct GUID *client_guid =
1318 &state->smb2req->session->client->connections->smb2.client.guid;
1319
1320 status = smb2srv_session_shutdown_recv(subreq);
1321 if (tevent_req_nterror(req, status)) {
1322 return;
1323 }
1324 TALLOC_FREE(subreq);
1325
1326 if (!GUID_all_zero(client_guid)) {
1327 ok = remote_arch_cache_delete(client_guid);
1328 if (!ok) {
1329 /* Most likely not an error, but not in cache */
1330 DBG_DEBUG("Deletion from remote arch cache failed\n");
1331 }
1332 }
1333
1334 /*
1335 * As we've been awoken, we may have changed
1336 * uid in the meantime. Ensure we're still
1337 * root (SMB2_OP_LOGOFF has .as_root = true).
1338 */
1339 change_to_root_user();
1340
1341 status = smbXsrv_session_logoff(state->smb2req->session);
1342 if (tevent_req_nterror(req, status)) {
1343 return;
1344 }
1345
1346 /*
1347 * we may need to sign the response, so we need to keep
1348 * the session until the response is sent to the wire.
1349 */
1350 talloc_steal(state->smb2req, state->smb2req->session);
1351
1352 tevent_req_done(req);
1353 }
1354
1355 static NTSTATUS smbd_smb2_logoff_recv(struct tevent_req *req)
1356 {
1357 return tevent_req_simple_recv_ntstatus(req);
1358 }
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