2 Unix SMB/CIFS implementation.
5 Copyright (C) Stefan Metzmacher 2009
6 Copyright (C) Jeremy Allison 2010
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.
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.
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/>.
23 #include "smbd/smbd.h"
24 #include "smbd/globals.h"
25 #include "../libcli/smb/smb_common.h"
26 #include "../auth/gensec/gensec.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"
36 static struct tevent_req *smbd_smb2_session_setup_wrap_send(TALLOC_CTX *mem_ctx,
37 struct tevent_context *ev,
38 struct smbd_smb2_request *smb2req,
39 uint64_t in_session_id,
41 uint8_t in_security_mode,
42 uint64_t in_previous_session_id,
43 DATA_BLOB in_security_buffer);
44 static NTSTATUS smbd_smb2_session_setup_wrap_recv(struct tevent_req *req,
45 uint16_t *out_session_flags,
47 DATA_BLOB *out_security_buffer,
48 uint64_t *out_session_id);
50 static void smbd_smb2_request_sesssetup_done(struct tevent_req *subreq);
52 NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *smb2req)
55 const uint8_t *inbody;
56 uint64_t in_session_id;
58 uint8_t in_security_mode;
59 uint64_t in_previous_session_id;
60 uint16_t in_security_offset;
61 uint16_t in_security_length;
62 DATA_BLOB in_security_buffer;
64 struct tevent_req *subreq;
66 status = smbd_smb2_request_verify_sizes(smb2req, 0x19);
67 if (!NT_STATUS_IS_OK(status)) {
68 return smbd_smb2_request_error(smb2req, status);
70 inhdr = SMBD_SMB2_IN_HDR_PTR(smb2req);
71 inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
73 in_session_id = BVAL(inhdr, SMB2_HDR_SESSION_ID);
75 in_flags = CVAL(inbody, 0x02);
76 in_security_mode = CVAL(inbody, 0x03);
77 /* Capabilities = IVAL(inbody, 0x04) */
78 /* Channel = IVAL(inbody, 0x08) */
79 in_security_offset = SVAL(inbody, 0x0C);
80 in_security_length = SVAL(inbody, 0x0E);
81 in_previous_session_id = BVAL(inbody, 0x10);
83 if (in_security_offset != (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req))) {
84 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
87 if (in_security_length > SMBD_SMB2_IN_DYN_LEN(smb2req)) {
88 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
91 in_security_buffer.data = SMBD_SMB2_IN_DYN_PTR(smb2req);
92 in_security_buffer.length = in_security_length;
94 subreq = smbd_smb2_session_setup_wrap_send(smb2req,
95 smb2req->sconn->ev_ctx,
100 in_previous_session_id,
102 if (subreq == NULL) {
103 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
105 tevent_req_set_callback(subreq, smbd_smb2_request_sesssetup_done, smb2req);
107 return smbd_smb2_request_pending_queue(smb2req, subreq, 500);
110 static void smbd_smb2_request_sesssetup_done(struct tevent_req *subreq)
112 struct smbd_smb2_request *smb2req =
113 tevent_req_callback_data(subreq,
114 struct smbd_smb2_request);
118 uint16_t out_session_flags = 0;
119 uint64_t out_session_id = 0;
120 uint16_t out_security_offset;
121 DATA_BLOB out_security_buffer = data_blob_null;
123 NTSTATUS error; /* transport error */
125 status = smbd_smb2_session_setup_wrap_recv(subreq,
128 &out_security_buffer,
131 if (!NT_STATUS_IS_OK(status) &&
132 !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
133 status = nt_status_squash(status);
134 error = smbd_smb2_request_error(smb2req, status);
135 if (!NT_STATUS_IS_OK(error)) {
136 smbd_server_connection_terminate(smb2req->xconn,
143 out_security_offset = SMB2_HDR_BODY + 0x08;
145 outhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
147 outbody = smbd_smb2_generate_outbody(smb2req, 0x08);
148 if (outbody.data == NULL) {
149 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
150 if (!NT_STATUS_IS_OK(error)) {
151 smbd_server_connection_terminate(smb2req->xconn,
158 SBVAL(outhdr, SMB2_HDR_SESSION_ID, out_session_id);
160 SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */
161 SSVAL(outbody.data, 0x02,
162 out_session_flags); /* session flags */
163 SSVAL(outbody.data, 0x04,
164 out_security_offset); /* security buffer offset */
165 SSVAL(outbody.data, 0x06,
166 out_security_buffer.length); /* security buffer length */
168 outdyn = out_security_buffer;
170 error = smbd_smb2_request_done_ex(smb2req, status, outbody, &outdyn,
172 if (!NT_STATUS_IS_OK(error)) {
173 smbd_server_connection_terminate(smb2req->xconn,
179 static NTSTATUS smbd_smb2_auth_generic_return(struct smbXsrv_session *session,
180 struct smbXsrv_session_auth0 **_auth,
181 struct smbd_smb2_request *smb2req,
182 uint8_t in_security_mode,
183 struct auth_session_info *session_info,
184 uint16_t *out_session_flags,
185 uint64_t *out_session_id)
189 uint8_t session_key[16];
190 struct smbXsrv_session *x = session;
191 struct smbXsrv_session_auth0 *auth = *_auth;
192 struct smbXsrv_connection *xconn = smb2req->xconn;
199 struct _derivation signing;
200 struct _derivation encryption;
201 struct _derivation decryption;
202 struct _derivation application;
207 if (xconn->protocol >= PROTOCOL_SMB3_10) {
208 struct smbXsrv_preauth *preauth;
209 struct _derivation *d;
211 struct hc_sha512state sctx;
213 preauth = talloc_move(smb2req, &auth->preauth);
215 samba_SHA512_Init(&sctx);
216 samba_SHA512_Update(&sctx, preauth->sha512_value,
217 sizeof(preauth->sha512_value));
218 for (i = 1; i < smb2req->in.vector_count; i++) {
219 samba_SHA512_Update(&sctx,
220 smb2req->in.vector[i].iov_base,
221 smb2req->in.vector[i].iov_len);
223 samba_SHA512_Final(preauth->sha512_value, &sctx);
225 p = data_blob_const(preauth->sha512_value,
226 sizeof(preauth->sha512_value));
228 d = &derivation.signing;
229 d->label = data_blob_string_const_null("SMBSigningKey");
232 d = &derivation.decryption;
233 d->label = data_blob_string_const_null("SMBC2SCipherKey");
236 d = &derivation.encryption;
237 d->label = data_blob_string_const_null("SMBS2CCipherKey");
240 d = &derivation.application;
241 d->label = data_blob_string_const_null("SMBAppKey");
244 } else if (xconn->protocol >= PROTOCOL_SMB2_24) {
245 struct _derivation *d;
247 d = &derivation.signing;
248 d->label = data_blob_string_const_null("SMB2AESCMAC");
249 d->context = data_blob_string_const_null("SmbSign");
251 d = &derivation.decryption;
252 d->label = data_blob_string_const_null("SMB2AESCCM");
253 d->context = data_blob_string_const_null("ServerIn ");
255 d = &derivation.encryption;
256 d->label = data_blob_string_const_null("SMB2AESCCM");
257 d->context = data_blob_string_const_null("ServerOut");
259 d = &derivation.application;
260 d->label = data_blob_string_const_null("SMB2APP");
261 d->context = data_blob_string_const_null("SmbRpc");
264 if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) ||
265 (xconn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
267 x->global->signing_flags = SMBXSRV_SIGNING_REQUIRED;
270 if ((lp_smb_encrypt(-1) >= SMB_SIGNING_DESIRED) &&
271 (xconn->smb2.client.capabilities & SMB2_CAP_ENCRYPTION)) {
272 x->global->encryption_flags = SMBXSRV_ENCRYPTION_DESIRED;
275 if (lp_smb_encrypt(-1) == SMB_SIGNING_REQUIRED) {
276 x->global->encryption_flags = SMBXSRV_ENCRYPTION_REQUIRED |
277 SMBXSRV_ENCRYPTION_DESIRED;
280 if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
281 if (security_session_user_level(session_info, NULL) == SECURITY_GUEST) {
282 *out_session_flags |= SMB2_SESSION_FLAG_IS_GUEST;
284 /* force no signing */
285 x->global->signing_flags &= ~SMBXSRV_SIGNING_REQUIRED;
286 /* we map anonymous to guest internally */
290 if (guest && (x->global->encryption_flags & SMBXSRV_ENCRYPTION_REQUIRED)) {
291 DEBUG(1,("reject guest session as encryption is required\n"));
292 return NT_STATUS_ACCESS_DENIED;
295 if (xconn->smb2.server.cipher == 0) {
296 if (x->global->encryption_flags & SMBXSRV_ENCRYPTION_REQUIRED) {
297 DEBUG(1,("reject session with dialect[0x%04X] "
298 "as encryption is required\n",
299 xconn->smb2.server.dialect));
300 return NT_STATUS_ACCESS_DENIED;
303 x->global->channels[0].encryption_cipher = xconn->smb2.server.cipher;
306 if (x->global->encryption_flags & SMBXSRV_ENCRYPTION_DESIRED) {
307 *out_session_flags |= SMB2_SESSION_FLAG_ENCRYPT_DATA;
310 ZERO_STRUCT(session_key);
311 memcpy(session_key, session_info->session_key.data,
312 MIN(session_info->session_key.length, sizeof(session_key)));
314 x->global->signing_key = data_blob_talloc(x->global,
316 sizeof(session_key));
317 if (x->global->signing_key.data == NULL) {
318 ZERO_STRUCT(session_key);
319 return NT_STATUS_NO_MEMORY;
322 if (xconn->protocol >= PROTOCOL_SMB2_24) {
323 struct _derivation *d = &derivation.signing;
325 smb2_key_derivation(session_key, sizeof(session_key),
326 d->label.data, d->label.length,
327 d->context.data, d->context.length,
328 x->global->signing_key.data);
331 if (xconn->protocol >= PROTOCOL_SMB2_24) {
332 struct _derivation *d = &derivation.decryption;
334 x->global->decryption_key = data_blob_talloc(x->global,
336 sizeof(session_key));
337 if (x->global->decryption_key.data == NULL) {
338 ZERO_STRUCT(session_key);
339 return NT_STATUS_NO_MEMORY;
342 smb2_key_derivation(session_key, sizeof(session_key),
343 d->label.data, d->label.length,
344 d->context.data, d->context.length,
345 x->global->decryption_key.data);
348 if (xconn->protocol >= PROTOCOL_SMB2_24) {
349 struct _derivation *d = &derivation.encryption;
352 x->global->encryption_key = data_blob_talloc(x->global,
354 sizeof(session_key));
355 if (x->global->encryption_key.data == NULL) {
356 ZERO_STRUCT(session_key);
357 return NT_STATUS_NO_MEMORY;
360 smb2_key_derivation(session_key, sizeof(session_key),
361 d->label.data, d->label.length,
362 d->context.data, d->context.length,
363 x->global->encryption_key.data);
366 * CCM and GCM algorithms must never have their
367 * nonce wrap, or the security of the whole
368 * communication and the keys is destroyed.
369 * We must drop the connection once we have
370 * transfered too much data.
372 * NOTE: We assume nonces greater than 8 bytes.
374 generate_random_buffer((uint8_t *)&x->nonce_high_random,
375 sizeof(x->nonce_high_random));
376 switch (xconn->smb2.server.cipher) {
377 case SMB2_ENCRYPTION_AES128_CCM:
378 nonce_size = AES_CCM_128_NONCE_SIZE;
380 case SMB2_ENCRYPTION_AES128_GCM:
381 nonce_size = AES_GCM_128_IV_SIZE;
387 x->nonce_high_max = SMB2_NONCE_HIGH_MAX(nonce_size);
392 x->global->application_key = data_blob_dup_talloc(x->global,
393 x->global->signing_key);
394 if (x->global->application_key.data == NULL) {
395 ZERO_STRUCT(session_key);
396 return NT_STATUS_NO_MEMORY;
399 if (xconn->protocol >= PROTOCOL_SMB2_24) {
400 struct _derivation *d = &derivation.application;
402 smb2_key_derivation(session_key, sizeof(session_key),
403 d->label.data, d->label.length,
404 d->context.data, d->context.length,
405 x->global->application_key.data);
407 ZERO_STRUCT(session_key);
409 x->global->channels[0].signing_key = data_blob_dup_talloc(x->global->channels,
410 x->global->signing_key);
411 if (x->global->channels[0].signing_key.data == NULL) {
412 return NT_STATUS_NO_MEMORY;
415 data_blob_clear_free(&session_info->session_key);
416 session_info->session_key = data_blob_dup_talloc(session_info,
417 x->global->application_key);
418 if (session_info->session_key.data == NULL) {
419 return NT_STATUS_NO_MEMORY;
422 session->compat = talloc_zero(session, struct user_struct);
423 if (session->compat == NULL) {
424 return NT_STATUS_NO_MEMORY;
426 session->compat->session = session;
427 session->compat->homes_snum = -1;
428 session->compat->session_info = session_info;
429 session->compat->session_keystr = NULL;
430 session->compat->vuid = session->global->session_wire_id;
431 DLIST_ADD(smb2req->sconn->users, session->compat);
432 smb2req->sconn->num_users++;
434 if (security_session_user_level(session_info, NULL) >= SECURITY_USER) {
435 session->compat->homes_snum =
436 register_homes_share(session_info->unix_info->unix_name);
439 set_current_user_info(session_info->unix_info->sanitized_username,
440 session_info->unix_info->unix_name,
441 session_info->info->domain_name);
443 reload_services(smb2req->sconn, conn_snum_used, true);
445 session->status = NT_STATUS_OK;
446 session->global->auth_session_info = talloc_move(session->global,
448 session->global->auth_session_info_seqnum += 1;
449 for (i=0; i < session->global->num_channels; i++) {
450 struct smbXsrv_channel_global0 *_c =
451 &session->global->channels[i];
453 _c->auth_session_info_seqnum =
454 session->global->auth_session_info_seqnum;
456 session->global->auth_time = timeval_to_nttime(&smb2req->request_time);
457 session->global->expiration_time = gensec_expire_time(auth->gensec);
459 if (!session_claim(session)) {
460 DEBUG(1, ("smb2: Failed to claim session "
462 (unsigned long long)session->compat->vuid));
463 return NT_STATUS_LOGON_FAILURE;
467 status = smbXsrv_session_update(session);
468 if (!NT_STATUS_IS_OK(status)) {
469 DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n",
470 (unsigned long long)session->compat->vuid,
472 return NT_STATUS_LOGON_FAILURE;
476 * we attach the session to the request
477 * so that the response can be signed
480 smb2req->do_signing = true;
483 global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32);
485 *out_session_id = session->global->session_wire_id;
490 static NTSTATUS smbd_smb2_reauth_generic_return(struct smbXsrv_session *session,
491 struct smbXsrv_session_auth0 **_auth,
492 struct smbd_smb2_request *smb2req,
493 struct auth_session_info *session_info,
494 uint16_t *out_session_flags,
495 uint64_t *out_session_id)
498 struct smbXsrv_session *x = session;
499 struct smbXsrv_session_auth0 *auth = *_auth;
500 struct smbXsrv_connection *xconn = smb2req->xconn;
505 data_blob_clear_free(&session_info->session_key);
506 session_info->session_key = data_blob_dup_talloc(session_info,
507 x->global->application_key);
508 if (session_info->session_key.data == NULL) {
509 return NT_STATUS_NO_MEMORY;
512 session->compat->session_info = session_info;
513 session->compat->vuid = session->global->session_wire_id;
515 session->compat->homes_snum =
516 register_homes_share(session_info->unix_info->unix_name);
518 set_current_user_info(session_info->unix_info->sanitized_username,
519 session_info->unix_info->unix_name,
520 session_info->info->domain_name);
522 reload_services(smb2req->sconn, conn_snum_used, true);
524 session->status = NT_STATUS_OK;
525 TALLOC_FREE(session->global->auth_session_info);
526 session->global->auth_session_info = talloc_move(session->global,
528 session->global->auth_session_info_seqnum += 1;
529 for (i=0; i < session->global->num_channels; i++) {
530 struct smbXsrv_channel_global0 *_c =
531 &session->global->channels[i];
533 _c->auth_session_info_seqnum =
534 session->global->auth_session_info_seqnum;
536 session->global->auth_time = timeval_to_nttime(&smb2req->request_time);
537 session->global->expiration_time = gensec_expire_time(auth->gensec);
540 status = smbXsrv_session_update(session);
541 if (!NT_STATUS_IS_OK(status)) {
542 DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n",
543 (unsigned long long)session->compat->vuid,
545 return NT_STATUS_LOGON_FAILURE;
548 conn_clear_vuid_caches(xconn->client->sconn, session->compat->vuid);
550 if (security_session_user_level(session_info, NULL) >= SECURITY_USER) {
551 smb2req->do_signing = true;
554 *out_session_id = session->global->session_wire_id;
559 static NTSTATUS smbd_smb2_bind_auth_return(struct smbXsrv_session *session,
560 struct smbXsrv_session_auth0 **_auth,
561 struct smbd_smb2_request *smb2req,
562 struct auth_session_info *session_info,
563 uint16_t *out_session_flags,
564 uint64_t *out_session_id)
567 struct smbXsrv_session *x = session;
568 struct smbXsrv_session_auth0 *auth = *_auth;
569 struct smbXsrv_connection *xconn = smb2req->xconn;
570 struct smbXsrv_channel_global0 *c = NULL;
571 uint8_t session_key[16];
578 struct _derivation signing;
584 if (xconn->protocol >= PROTOCOL_SMB3_10) {
585 struct smbXsrv_preauth *preauth;
586 struct _derivation *d;
588 struct hc_sha512state sctx;
590 preauth = talloc_move(smb2req, &auth->preauth);
592 samba_SHA512_Init(&sctx);
593 samba_SHA512_Update(&sctx, preauth->sha512_value,
594 sizeof(preauth->sha512_value));
595 for (i = 1; i < smb2req->in.vector_count; i++) {
596 samba_SHA512_Update(&sctx,
597 smb2req->in.vector[i].iov_base,
598 smb2req->in.vector[i].iov_len);
600 samba_SHA512_Final(preauth->sha512_value, &sctx);
602 p = data_blob_const(preauth->sha512_value,
603 sizeof(preauth->sha512_value));
605 d = &derivation.signing;
606 d->label = data_blob_string_const_null("SMBSigningKey");
609 } else if (xconn->protocol >= PROTOCOL_SMB2_24) {
610 struct _derivation *d;
612 d = &derivation.signing;
613 d->label = data_blob_string_const_null("SMB2AESCMAC");
614 d->context = data_blob_string_const_null("SmbSign");
617 status = smbXsrv_session_find_channel(session, xconn, &c);
618 if (!NT_STATUS_IS_OK(status)) {
622 ok = security_token_is_sid(session_info->security_token,
623 &x->global->auth_session_info->security_token->sids[0]);
625 return NT_STATUS_NOT_SUPPORTED;
628 if (session_info->session_key.length == 0) {
629 /* See [MS-SMB2] 3.3.5.2.4 for the return code. */
630 return NT_STATUS_NOT_SUPPORTED;
633 ZERO_STRUCT(session_key);
634 memcpy(session_key, session_info->session_key.data,
635 MIN(session_info->session_key.length, sizeof(session_key)));
637 c->signing_key = data_blob_talloc(x->global,
639 sizeof(session_key));
640 if (c->signing_key.data == NULL) {
641 ZERO_STRUCT(session_key);
642 return NT_STATUS_NO_MEMORY;
645 if (xconn->protocol >= PROTOCOL_SMB2_24) {
646 struct _derivation *d = &derivation.signing;
648 smb2_key_derivation(session_key, sizeof(session_key),
649 d->label.data, d->label.length,
650 d->context.data, d->context.length,
651 c->signing_key.data);
653 ZERO_STRUCT(session_key);
656 status = smbXsrv_session_update(session);
657 if (!NT_STATUS_IS_OK(status)) {
658 DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n",
659 (unsigned long long)session->compat->vuid,
661 return NT_STATUS_LOGON_FAILURE;
664 *out_session_id = session->global->session_wire_id;
669 struct smbd_smb2_session_setup_state {
670 struct tevent_context *ev;
671 struct smbd_smb2_request *smb2req;
672 uint64_t in_session_id;
674 uint8_t in_security_mode;
675 uint64_t in_previous_session_id;
676 DATA_BLOB in_security_buffer;
677 struct smbXsrv_session *session;
678 struct smbXsrv_session_auth0 *auth;
679 struct auth_session_info *session_info;
680 uint16_t out_session_flags;
681 DATA_BLOB out_security_buffer;
682 uint64_t out_session_id;
685 static void smbd_smb2_session_setup_gensec_done(struct tevent_req *subreq);
686 static void smbd_smb2_session_setup_previous_done(struct tevent_req *subreq);
687 static void smbd_smb2_session_setup_auth_return(struct tevent_req *req);
689 static struct tevent_req *smbd_smb2_session_setup_send(TALLOC_CTX *mem_ctx,
690 struct tevent_context *ev,
691 struct smbd_smb2_request *smb2req,
692 uint64_t in_session_id,
694 uint8_t in_security_mode,
695 uint64_t in_previous_session_id,
696 DATA_BLOB in_security_buffer)
698 struct tevent_req *req;
699 struct smbd_smb2_session_setup_state *state;
701 NTTIME now = timeval_to_nttime(&smb2req->request_time);
702 struct tevent_req *subreq;
703 struct smbXsrv_channel_global0 *c = NULL;
704 enum security_user_level seclvl;
706 req = tevent_req_create(mem_ctx, &state,
707 struct smbd_smb2_session_setup_state);
712 state->smb2req = smb2req;
713 state->in_session_id = in_session_id;
714 state->in_flags = in_flags;
715 state->in_security_mode = in_security_mode;
716 state->in_previous_session_id = in_previous_session_id;
717 state->in_security_buffer = in_security_buffer;
719 if (in_flags & SMB2_SESSION_FLAG_BINDING) {
720 if (smb2req->xconn->protocol < PROTOCOL_SMB2_22) {
721 tevent_req_nterror(req, NT_STATUS_REQUEST_NOT_ACCEPTED);
722 return tevent_req_post(req, ev);
725 if (!smb2req->xconn->client->server_multi_channel_enabled) {
726 tevent_req_nterror(req, NT_STATUS_REQUEST_NOT_ACCEPTED);
727 return tevent_req_post(req, ev);
730 if (in_session_id == 0) {
731 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
732 return tevent_req_post(req, ev);
735 if (smb2req->session == NULL) {
736 tevent_req_nterror(req, NT_STATUS_USER_SESSION_DELETED);
737 return tevent_req_post(req, ev);
740 if (!smb2req->do_signing) {
741 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
742 return tevent_req_post(req, ev);
745 status = smbXsrv_session_find_channel(smb2req->session,
748 if (NT_STATUS_IS_OK(status)) {
749 if (c->signing_key.length == 0) {
752 tevent_req_nterror(req, NT_STATUS_REQUEST_NOT_ACCEPTED);
753 return tevent_req_post(req, ev);
757 * OLD: 3.00 NEW 3.02 => INVALID_PARAMETER
758 * OLD: 3.02 NEW 3.00 => INVALID_PARAMETER
759 * OLD: 2.10 NEW 3.02 => ACCESS_DENIED
760 * OLD: 3.02 NEW 2.10 => ACCESS_DENIED
762 if (smb2req->session->global->connection_dialect
763 < SMB2_DIALECT_REVISION_222)
765 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
766 return tevent_req_post(req, ev);
768 if (smb2req->xconn->smb2.server.dialect
769 < SMB2_DIALECT_REVISION_222)
771 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
772 return tevent_req_post(req, ev);
774 if (smb2req->session->global->connection_dialect
775 != smb2req->xconn->smb2.server.dialect)
777 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
778 return tevent_req_post(req, ev);
781 seclvl = security_session_user_level(
782 smb2req->session->global->auth_session_info,
784 if (seclvl < SECURITY_USER) {
785 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
786 return tevent_req_post(req, ev);
789 status = smbXsrv_session_add_channel(smb2req->session,
792 if (!NT_STATUS_IS_OK(status)) {
793 tevent_req_nterror(req, status);
794 return tevent_req_post(req, ev);
797 status = smbXsrv_session_update(smb2req->session);
798 if (!NT_STATUS_IS_OK(status)) {
799 tevent_req_nterror(req, status);
800 return tevent_req_post(req, ev);
806 if (state->in_session_id == 0) {
807 /* create a new session */
808 status = smbXsrv_session_create(state->smb2req->xconn,
809 now, &state->session);
810 if (tevent_req_nterror(req, status)) {
811 return tevent_req_post(req, ev);
813 smb2req->session = state->session;
815 if (smb2req->session == NULL) {
816 tevent_req_nterror(req, NT_STATUS_USER_SESSION_DELETED);
817 return tevent_req_post(req, ev);
820 state->session = smb2req->session;
821 status = state->session->status;
822 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED)) {
823 status = NT_STATUS_OK;
825 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
826 status = NT_STATUS_OK;
828 if (tevent_req_nterror(req, status)) {
829 return tevent_req_post(req, ev);
831 if (!(in_flags & SMB2_SESSION_FLAG_BINDING)) {
832 state->session->status = NT_STATUS_MORE_PROCESSING_REQUIRED;
836 status = smbXsrv_session_find_channel(smb2req->session,
838 if (!NT_STATUS_IS_OK(status)) {
839 tevent_req_nterror(req, status);
840 return tevent_req_post(req, ev);
843 status = smbXsrv_session_find_auth(state->session, smb2req->xconn,
845 if (!NT_STATUS_IS_OK(status)) {
846 status = smbXsrv_session_create_auth(state->session,
848 in_flags, in_security_mode,
850 if (tevent_req_nterror(req, status)) {
851 return tevent_req_post(req, ev);
855 if (state->auth->gensec == NULL) {
856 status = auth_generic_prepare(state->auth,
857 state->smb2req->xconn->remote_address,
858 state->smb2req->xconn->local_address,
860 &state->auth->gensec);
861 if (tevent_req_nterror(req, status)) {
862 return tevent_req_post(req, ev);
865 gensec_want_feature(state->auth->gensec, GENSEC_FEATURE_SESSION_KEY);
866 gensec_want_feature(state->auth->gensec, GENSEC_FEATURE_UNIX_TOKEN);
867 gensec_want_feature(state->auth->gensec, GENSEC_FEATURE_SMB_TRANSPORT);
869 status = gensec_start_mech_by_oid(state->auth->gensec,
871 if (tevent_req_nterror(req, status)) {
872 return tevent_req_post(req, ev);
876 status = smbXsrv_session_update(state->session);
877 if (tevent_req_nterror(req, status)) {
878 return tevent_req_post(req, ev);
882 subreq = gensec_update_send(state, state->ev,
884 state->in_security_buffer);
886 if (tevent_req_nomem(subreq, req)) {
887 return tevent_req_post(req, ev);
889 tevent_req_set_callback(subreq, smbd_smb2_session_setup_gensec_done, req);
894 static void smbd_smb2_session_setup_gensec_done(struct tevent_req *subreq)
896 struct tevent_req *req =
897 tevent_req_callback_data(subreq,
899 struct smbd_smb2_session_setup_state *state =
901 struct smbd_smb2_session_setup_state);
905 status = gensec_update_recv(subreq, state,
906 &state->out_security_buffer);
909 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) &&
910 !NT_STATUS_IS_OK(status)) {
911 tevent_req_nterror(req, status);
915 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
916 state->out_session_id = state->session->global->session_wire_id;
917 state->smb2req->preauth = state->auth->preauth;
918 tevent_req_nterror(req, status);
922 status = gensec_session_info(state->auth->gensec,
924 &state->session_info);
925 if (tevent_req_nterror(req, status)) {
929 if ((state->in_previous_session_id != 0) &&
930 (state->session->global->session_wire_id !=
931 state->in_previous_session_id))
933 subreq = smb2srv_session_close_previous_send(state, state->ev,
934 state->smb2req->xconn,
936 state->in_previous_session_id,
937 state->session->global->session_wire_id);
938 if (tevent_req_nomem(subreq, req)) {
941 tevent_req_set_callback(subreq,
942 smbd_smb2_session_setup_previous_done,
947 smbd_smb2_session_setup_auth_return(req);
950 static void smbd_smb2_session_setup_previous_done(struct tevent_req *subreq)
952 struct tevent_req *req =
953 tevent_req_callback_data(subreq,
957 status = smb2srv_session_close_previous_recv(subreq);
959 if (tevent_req_nterror(req, status)) {
963 smbd_smb2_session_setup_auth_return(req);
966 static void smbd_smb2_session_setup_auth_return(struct tevent_req *req)
968 struct smbd_smb2_session_setup_state *state =
970 struct smbd_smb2_session_setup_state);
973 if (state->in_flags & SMB2_SESSION_FLAG_BINDING) {
974 status = smbd_smb2_bind_auth_return(state->session,
978 &state->out_session_flags,
979 &state->out_session_id);
980 if (tevent_req_nterror(req, status)) {
983 tevent_req_done(req);
987 if (state->session->global->auth_session_info != NULL) {
988 status = smbd_smb2_reauth_generic_return(state->session,
992 &state->out_session_flags,
993 &state->out_session_id);
994 if (tevent_req_nterror(req, status)) {
997 tevent_req_done(req);
1001 status = smbd_smb2_auth_generic_return(state->session,
1004 state->in_security_mode,
1005 state->session_info,
1006 &state->out_session_flags,
1007 &state->out_session_id);
1008 if (tevent_req_nterror(req, status)) {
1012 tevent_req_done(req);
1016 static NTSTATUS smbd_smb2_session_setup_recv(struct tevent_req *req,
1017 uint16_t *out_session_flags,
1018 TALLOC_CTX *mem_ctx,
1019 DATA_BLOB *out_security_buffer,
1020 uint64_t *out_session_id)
1022 struct smbd_smb2_session_setup_state *state =
1023 tevent_req_data(req,
1024 struct smbd_smb2_session_setup_state);
1027 if (tevent_req_is_nterror(req, &status)) {
1028 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1029 tevent_req_received(req);
1030 return nt_status_squash(status);
1033 status = NT_STATUS_OK;
1036 *out_session_flags = state->out_session_flags;
1037 *out_security_buffer = state->out_security_buffer;
1038 *out_session_id = state->out_session_id;
1040 talloc_steal(mem_ctx, out_security_buffer->data);
1041 tevent_req_received(req);
1045 struct smbd_smb2_session_setup_wrap_state {
1046 struct tevent_context *ev;
1047 struct smbd_smb2_request *smb2req;
1048 uint64_t in_session_id;
1050 uint8_t in_security_mode;
1051 uint64_t in_previous_session_id;
1052 DATA_BLOB in_security_buffer;
1053 uint16_t out_session_flags;
1054 DATA_BLOB out_security_buffer;
1055 uint64_t out_session_id;
1059 static void smbd_smb2_session_setup_wrap_setup_done(struct tevent_req *subreq);
1060 static void smbd_smb2_session_setup_wrap_shutdown_done(struct tevent_req *subreq);
1062 static struct tevent_req *smbd_smb2_session_setup_wrap_send(TALLOC_CTX *mem_ctx,
1063 struct tevent_context *ev,
1064 struct smbd_smb2_request *smb2req,
1065 uint64_t in_session_id,
1067 uint8_t in_security_mode,
1068 uint64_t in_previous_session_id,
1069 DATA_BLOB in_security_buffer)
1071 struct tevent_req *req;
1072 struct smbd_smb2_session_setup_wrap_state *state;
1073 struct tevent_req *subreq;
1075 req = tevent_req_create(mem_ctx, &state,
1076 struct smbd_smb2_session_setup_wrap_state);
1081 state->smb2req = smb2req;
1082 state->in_session_id = in_session_id;
1083 state->in_flags = in_flags;
1084 state->in_security_mode = in_security_mode;
1085 state->in_previous_session_id = in_previous_session_id;
1086 state->in_security_buffer = in_security_buffer;
1088 subreq = smbd_smb2_session_setup_send(state, state->ev,
1090 state->in_session_id,
1092 state->in_security_mode,
1093 state->in_previous_session_id,
1094 state->in_security_buffer);
1095 if (tevent_req_nomem(subreq, req)) {
1096 return tevent_req_post(req, ev);
1098 tevent_req_set_callback(subreq,
1099 smbd_smb2_session_setup_wrap_setup_done, req);
1104 static void smbd_smb2_session_setup_wrap_setup_done(struct tevent_req *subreq)
1106 struct tevent_req *req =
1107 tevent_req_callback_data(subreq,
1109 struct smbd_smb2_session_setup_wrap_state *state =
1110 tevent_req_data(req,
1111 struct smbd_smb2_session_setup_wrap_state);
1114 status = smbd_smb2_session_setup_recv(subreq,
1115 &state->out_session_flags,
1117 &state->out_security_buffer,
1118 &state->out_session_id);
1119 TALLOC_FREE(subreq);
1120 if (NT_STATUS_IS_OK(status)) {
1121 tevent_req_done(req);
1124 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1125 tevent_req_nterror(req, status);
1129 if (state->smb2req->session == NULL) {
1130 tevent_req_nterror(req, status);
1134 state->error = status;
1136 subreq = smb2srv_session_shutdown_send(state, state->ev,
1137 state->smb2req->session,
1139 if (tevent_req_nomem(subreq, req)) {
1142 tevent_req_set_callback(subreq,
1143 smbd_smb2_session_setup_wrap_shutdown_done,
1147 static void smbd_smb2_session_setup_wrap_shutdown_done(struct tevent_req *subreq)
1149 struct tevent_req *req =
1150 tevent_req_callback_data(subreq,
1152 struct smbd_smb2_session_setup_wrap_state *state =
1153 tevent_req_data(req,
1154 struct smbd_smb2_session_setup_wrap_state);
1157 status = smb2srv_session_shutdown_recv(subreq);
1158 TALLOC_FREE(subreq);
1159 if (tevent_req_nterror(req, status)) {
1164 * we may need to sign the response, so we need to keep
1165 * the session until the response is sent to the wire.
1167 talloc_steal(state->smb2req, state->smb2req->session);
1169 tevent_req_nterror(req, state->error);
1172 static NTSTATUS smbd_smb2_session_setup_wrap_recv(struct tevent_req *req,
1173 uint16_t *out_session_flags,
1174 TALLOC_CTX *mem_ctx,
1175 DATA_BLOB *out_security_buffer,
1176 uint64_t *out_session_id)
1178 struct smbd_smb2_session_setup_wrap_state *state =
1179 tevent_req_data(req,
1180 struct smbd_smb2_session_setup_wrap_state);
1183 if (tevent_req_is_nterror(req, &status)) {
1184 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1185 tevent_req_received(req);
1186 return nt_status_squash(status);
1189 status = NT_STATUS_OK;
1192 *out_session_flags = state->out_session_flags;
1193 *out_security_buffer = state->out_security_buffer;
1194 *out_session_id = state->out_session_id;
1196 talloc_steal(mem_ctx, out_security_buffer->data);
1197 tevent_req_received(req);
1201 static struct tevent_req *smbd_smb2_logoff_send(TALLOC_CTX *mem_ctx,
1202 struct tevent_context *ev,
1203 struct smbd_smb2_request *smb2req);
1204 static NTSTATUS smbd_smb2_logoff_recv(struct tevent_req *req);
1205 static void smbd_smb2_request_logoff_done(struct tevent_req *subreq);
1207 NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req)
1210 struct tevent_req *subreq = NULL;
1212 status = smbd_smb2_request_verify_sizes(req, 0x04);
1213 if (!NT_STATUS_IS_OK(status)) {
1214 return smbd_smb2_request_error(req, status);
1217 subreq = smbd_smb2_logoff_send(req, req->sconn->ev_ctx, req);
1218 if (subreq == NULL) {
1219 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
1221 tevent_req_set_callback(subreq, smbd_smb2_request_logoff_done, req);
1224 * Wait a long time before going async on this to allow
1225 * requests we're waiting on to finish. Set timeout to 10 secs.
1227 return smbd_smb2_request_pending_queue(req, subreq, 10000000);
1230 static void smbd_smb2_request_logoff_done(struct tevent_req *subreq)
1232 struct smbd_smb2_request *smb2req =
1233 tevent_req_callback_data(subreq,
1234 struct smbd_smb2_request);
1239 status = smbd_smb2_logoff_recv(subreq);
1240 TALLOC_FREE(subreq);
1241 if (!NT_STATUS_IS_OK(status)) {
1242 error = smbd_smb2_request_error(smb2req, status);
1243 if (!NT_STATUS_IS_OK(error)) {
1244 smbd_server_connection_terminate(smb2req->xconn,
1251 outbody = smbd_smb2_generate_outbody(smb2req, 0x04);
1252 if (outbody.data == NULL) {
1253 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
1254 if (!NT_STATUS_IS_OK(error)) {
1255 smbd_server_connection_terminate(smb2req->xconn,
1262 SSVAL(outbody.data, 0x00, 0x04); /* struct size */
1263 SSVAL(outbody.data, 0x02, 0); /* reserved */
1265 error = smbd_smb2_request_done(smb2req, outbody, NULL);
1266 if (!NT_STATUS_IS_OK(error)) {
1267 smbd_server_connection_terminate(smb2req->xconn,
1273 struct smbd_smb2_logoff_state {
1274 struct smbd_smb2_request *smb2req;
1277 static void smbd_smb2_logoff_shutdown_done(struct tevent_req *subreq);
1279 static struct tevent_req *smbd_smb2_logoff_send(TALLOC_CTX *mem_ctx,
1280 struct tevent_context *ev,
1281 struct smbd_smb2_request *smb2req)
1283 struct tevent_req *req;
1284 struct smbd_smb2_logoff_state *state;
1285 struct tevent_req *subreq;
1287 req = tevent_req_create(mem_ctx, &state,
1288 struct smbd_smb2_logoff_state);
1292 state->smb2req = smb2req;
1294 subreq = smb2srv_session_shutdown_send(state, ev,
1297 if (tevent_req_nomem(subreq, req)) {
1298 return tevent_req_post(req, ev);
1300 tevent_req_set_callback(subreq, smbd_smb2_logoff_shutdown_done, req);
1305 static void smbd_smb2_logoff_shutdown_done(struct tevent_req *subreq)
1307 struct tevent_req *req = tevent_req_callback_data(
1308 subreq, struct tevent_req);
1309 struct smbd_smb2_logoff_state *state = tevent_req_data(
1310 req, struct smbd_smb2_logoff_state);
1313 const struct GUID *client_guid =
1314 &state->smb2req->session->client->connections->smb2.client.guid;
1316 status = smb2srv_session_shutdown_recv(subreq);
1317 if (tevent_req_nterror(req, status)) {
1320 TALLOC_FREE(subreq);
1322 if (!GUID_all_zero(client_guid)) {
1323 ok = remote_arch_cache_delete(client_guid);
1325 /* Most likely not an error, but not in cache */
1326 DBG_DEBUG("Deletion from remote arch cache failed\n");
1331 * As we've been awoken, we may have changed
1332 * uid in the meantime. Ensure we're still
1333 * root (SMB2_OP_LOGOFF has .as_root = true).
1335 change_to_root_user();
1337 status = smbXsrv_session_logoff(state->smb2req->session);
1338 if (tevent_req_nterror(req, status)) {
1343 * we may need to sign the response, so we need to keep
1344 * the session until the response is sent to the wire.
1346 talloc_steal(state->smb2req, state->smb2req->session);
1348 tevent_req_done(req);
1351 static NTSTATUS smbd_smb2_logoff_recv(struct tevent_req *req)
1353 return tevent_req_simple_recv_ntstatus(req);