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samba_upgradeprovision: only run rebuild_sd in --full mode
[Samba.git] / libcli / smb / smbXcli_base.c
blobc971a6d274b211a9441bdcb86e1d01cdeccfb59a
1 /*
2 Unix SMB/CIFS implementation.
3 Infrastructure for async SMB client requests
4 Copyright (C) Volker Lendecke 2008
5 Copyright (C) Stefan Metzmacher 2011
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "includes.h"
22 #include "system/network.h"
23 #include "../lib/async_req/async_sock.h"
24 #include "../lib/util/tevent_ntstatus.h"
25 #include "../lib/util/tevent_unix.h"
26 #include "lib/util/util_net.h"
27 #include "lib/util/dlinklist.h"
28 #include "../libcli/smb/smb_common.h"
29 #include "../libcli/smb/smb_seal.h"
30 #include "../libcli/smb/smb_signing.h"
31 #include "../libcli/smb/read_smb.h"
32 #include "smbXcli_base.h"
33 #include "librpc/ndr/libndr.h"
34
35 struct smbXcli_conn;
36 struct smbXcli_req;
37 struct smbXcli_session;
38 struct smbXcli_tcon;
39
40 struct smbXcli_conn {
41 int read_fd;
42 int write_fd;
43 struct sockaddr_storage local_ss;
44 struct sockaddr_storage remote_ss;
45 const char *remote_name;
46
47 struct tevent_queue *outgoing;
48 struct tevent_req **pending;
49 struct tevent_req *read_smb_req;
50
51 enum protocol_types protocol;
52 bool allow_signing;
53 bool desire_signing;
54 bool mandatory_signing;
55
56 /*
57 * The incoming dispatch function should return:
58 * - NT_STATUS_RETRY, if more incoming PDUs are expected.
59 * - NT_STATUS_OK, if no more processing is desired, e.g.
60 * the dispatch function called
61 * tevent_req_done().
62 * - All other return values disconnect the connection.
63 */
64 NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
65 TALLOC_CTX *tmp_mem,
66 uint8_t *inbuf);
67
68 struct {
69 struct {
70 uint32_t capabilities;
71 uint32_t max_xmit;
72 } client;
73
74 struct {
75 uint32_t capabilities;
76 uint32_t max_xmit;
77 uint16_t max_mux;
78 uint16_t security_mode;
79 bool readbraw;
80 bool writebraw;
81 bool lockread;
82 bool writeunlock;
83 uint32_t session_key;
84 struct GUID guid;
85 DATA_BLOB gss_blob;
86 uint8_t challenge[8];
87 const char *workgroup;
88 const char *name;
89 int time_zone;
90 NTTIME system_time;
91 } server;
92
93 uint32_t capabilities;
94 uint32_t max_xmit;
95
96 uint16_t mid;
97
98 struct smb_signing_state *signing;
99 struct smb_trans_enc_state *trans_enc;
100
101 struct tevent_req *read_braw_req;
102 } smb1;
103
104 struct {
105 struct {
106 uint32_t capabilities;
107 uint16_t security_mode;
108 struct GUID guid;
109 } client;
110
111 struct {
112 uint32_t capabilities;
113 uint16_t security_mode;
114 struct GUID guid;
115 uint32_t max_trans_size;
116 uint32_t max_read_size;
117 uint32_t max_write_size;
118 NTTIME system_time;
119 NTTIME start_time;
120 DATA_BLOB gss_blob;
121 } server;
122
123 uint64_t mid;
124 uint16_t cur_credits;
125 uint16_t max_credits;
126 } smb2;
127
128 struct smbXcli_session *sessions;
129 };
130
131 struct smb2cli_session {
132 uint64_t session_id;
133 uint16_t session_flags;
134 DATA_BLOB application_key;
135 DATA_BLOB signing_key;
136 bool should_sign;
137 bool should_encrypt;
138 DATA_BLOB encryption_key;
139 DATA_BLOB decryption_key;
140 uint64_t nonce_high;
141 uint64_t nonce_low;
142 uint16_t channel_sequence;
143 };
144
145 struct smbXcli_session {
146 struct smbXcli_session *prev, *next;
147 struct smbXcli_conn *conn;
148
149 struct {
150 uint16_t session_id;
151 DATA_BLOB application_key;
152 bool protected_key;
153 } smb1;
154
155 struct smb2cli_session *smb2;
156
157 struct {
158 DATA_BLOB signing_key;
159 } smb2_channel;
160
161 /*
162 * this should be a short term hack
163 * until the upper layers have implemented
164 * re-authentication.
165 */
166 bool disconnect_expired;
167 };
168
169 struct smbXcli_tcon {
170 struct {
171 uint16_t tcon_id;
172 uint16_t optional_support;
173 uint32_t maximal_access;
174 uint32_t guest_maximal_access;
175 char *service;
176 char *fs_type;
177 } smb1;
178
179 struct {
180 uint32_t tcon_id;
181 uint8_t type;
182 uint32_t flags;
183 uint32_t capabilities;
184 uint32_t maximal_access;
185 bool should_encrypt;
186 } smb2;
187 };
188
189 struct smbXcli_req_state {
190 struct tevent_context *ev;
191 struct smbXcli_conn *conn;
192 struct smbXcli_session *session; /* maybe NULL */
193 struct smbXcli_tcon *tcon; /* maybe NULL */
194
195 uint8_t length_hdr[4];
196
197 bool one_way;
198
199 uint8_t *inbuf;
200
201 struct {
202 /* Space for the header including the wct */
203 uint8_t hdr[HDR_VWV];
204
205 /*
206 * For normal requests, smb1cli_req_send chooses a mid.
207 * SecondaryV trans requests need to use the mid of the primary
208 * request, so we need a place to store it.
209 * Assume it is set if != 0.
210 */
211 uint16_t mid;
212
213 uint16_t *vwv;
214 uint8_t bytecount_buf[2];
215
216 #define MAX_SMB_IOV 10
217 /* length_hdr, hdr, words, byte_count, buffers */
218 struct iovec iov[1 + 3 + MAX_SMB_IOV];
219 int iov_count;
220
221 bool one_way_seqnum;
222 uint32_t seqnum;
223 struct tevent_req **chained_requests;
224
225 uint8_t recv_cmd;
226 NTSTATUS recv_status;
227 /* always an array of 3 talloc elements */
228 struct iovec *recv_iov;
229 } smb1;
230
231 struct {
232 const uint8_t *fixed;
233 uint16_t fixed_len;
234 const uint8_t *dyn;
235 uint32_t dyn_len;
236
237 uint8_t transform[SMB2_TF_HDR_SIZE];
238 uint8_t hdr[SMB2_HDR_BODY];
239 uint8_t pad[7]; /* padding space for compounding */
240
241 /*
242 * always an array of 3 talloc elements
243 * (without a SMB2_TRANSFORM header!)
244 *
245 * HDR, BODY, DYN
246 */
247 struct iovec *recv_iov;
248
249 uint16_t credit_charge;
250
251 bool should_sign;
252 bool should_encrypt;
253 uint64_t encryption_session_id;
254
255 bool signing_skipped;
256 bool notify_async;
257 bool got_async;
258 } smb2;
259 };
260
261 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
262 {
263 /*
264 * NT_STATUS_OK, means we do not notify the callers
265 */
266 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
267
268 while (conn->sessions) {
269 conn->sessions->conn = NULL;
270 DLIST_REMOVE(conn->sessions, conn->sessions);
271 }
272
273 if (conn->smb1.trans_enc) {
274 TALLOC_FREE(conn->smb1.trans_enc);
275 }
276
277 return 0;
278 }
279
280 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
281 int fd,
282 const char *remote_name,
283 enum smb_signing_setting signing_state,
284 uint32_t smb1_capabilities,
285 struct GUID *client_guid,
286 uint32_t smb2_capabilities)
287 {
288 struct smbXcli_conn *conn = NULL;
289 void *ss = NULL;
290 struct sockaddr *sa = NULL;
291 socklen_t sa_length;
292 int ret;
293
294 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
295 if (!conn) {
296 return NULL;
297 }
298
299 conn->read_fd = fd;
300 conn->write_fd = dup(fd);
301 if (conn->write_fd == -1) {
302 goto error;
303 }
304
305 conn->remote_name = talloc_strdup(conn, remote_name);
306 if (conn->remote_name == NULL) {
307 goto error;
308 }
309
310
311 ss = (void *)&conn->local_ss;
312 sa = (struct sockaddr *)ss;
313 sa_length = sizeof(conn->local_ss);
314 ret = getsockname(fd, sa, &sa_length);
315 if (ret == -1) {
316 goto error;
317 }
318 ss = (void *)&conn->remote_ss;
319 sa = (struct sockaddr *)ss;
320 sa_length = sizeof(conn->remote_ss);
321 ret = getpeername(fd, sa, &sa_length);
322 if (ret == -1) {
323 goto error;
324 }
325
326 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
327 if (conn->outgoing == NULL) {
328 goto error;
329 }
330 conn->pending = NULL;
331
332 conn->protocol = PROTOCOL_NONE;
333
334 switch (signing_state) {
335 case SMB_SIGNING_OFF:
336 /* never */
337 conn->allow_signing = false;
338 conn->desire_signing = false;
339 conn->mandatory_signing = false;
340 break;
341 case SMB_SIGNING_DEFAULT:
342 case SMB_SIGNING_IF_REQUIRED:
343 /* if the server requires it */
344 conn->allow_signing = true;
345 conn->desire_signing = false;
346 conn->mandatory_signing = false;
347 break;
348 case SMB_SIGNING_REQUIRED:
349 /* always */
350 conn->allow_signing = true;
351 conn->desire_signing = true;
352 conn->mandatory_signing = true;
353 break;
354 }
355
356 conn->smb1.client.capabilities = smb1_capabilities;
357 conn->smb1.client.max_xmit = UINT16_MAX;
358
359 conn->smb1.capabilities = conn->smb1.client.capabilities;
360 conn->smb1.max_xmit = 1024;
361
362 conn->smb1.mid = 1;
363
364 /* initialise signing */
365 conn->smb1.signing = smb_signing_init(conn,
366 conn->allow_signing,
367 conn->desire_signing,
368 conn->mandatory_signing);
369 if (!conn->smb1.signing) {
370 goto error;
371 }
372
373 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
374 if (conn->mandatory_signing) {
375 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
376 }
377 if (client_guid) {
378 conn->smb2.client.guid = *client_guid;
379 }
380 conn->smb2.client.capabilities = smb2_capabilities;
381
382 conn->smb2.cur_credits = 1;
383 conn->smb2.max_credits = 0;
384
385 talloc_set_destructor(conn, smbXcli_conn_destructor);
386 return conn;
387
388 error:
389 if (conn->write_fd != -1) {
390 close(conn->write_fd);
391 }
392 TALLOC_FREE(conn);
393 return NULL;
394 }
395
396 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
397 {
398 if (conn == NULL) {
399 return false;
400 }
401
402 if (conn->read_fd == -1) {
403 return false;
404 }
405
406 return true;
407 }
408
409 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
410 {
411 return conn->protocol;
412 }
413
414 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
415 {
416 if (conn->protocol >= PROTOCOL_SMB2_02) {
417 return true;
418 }
419
420 if (conn->smb1.capabilities & CAP_UNICODE) {
421 return true;
422 }
423
424 return false;
425 }
426
427 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
428 {
429 set_socket_options(conn->read_fd, options);
430 }
431
432 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
433 {
434 return &conn->local_ss;
435 }
436
437 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
438 {
439 return &conn->remote_ss;
440 }
441
442 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
443 {
444 return conn->remote_name;
445 }
446
447 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
448 {
449 if (conn->protocol >= PROTOCOL_SMB2_02) {
450 /*
451 * TODO...
452 */
453 return 1;
454 }
455
456 return conn->smb1.server.max_mux;
457 }
458
459 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
460 {
461 if (conn->protocol >= PROTOCOL_SMB2_02) {
462 return conn->smb2.server.system_time;
463 }
464
465 return conn->smb1.server.system_time;
466 }
467
468 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
469 {
470 if (conn->protocol >= PROTOCOL_SMB2_02) {
471 return &conn->smb2.server.gss_blob;
472 }
473
474 return &conn->smb1.server.gss_blob;
475 }
476
477 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
478 {
479 if (conn->protocol >= PROTOCOL_SMB2_02) {
480 return &conn->smb2.server.guid;
481 }
482
483 return &conn->smb1.server.guid;
484 }
485
486 struct smbXcli_conn_samba_suicide_state {
487 struct smbXcli_conn *conn;
488 struct iovec iov;
489 uint8_t buf[9];
490 };
491
492 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
493
494 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
495 struct tevent_context *ev,
496 struct smbXcli_conn *conn,
497 uint8_t exitcode)
498 {
499 struct tevent_req *req, *subreq;
500 struct smbXcli_conn_samba_suicide_state *state;
501
502 req = tevent_req_create(mem_ctx, &state,
503 struct smbXcli_conn_samba_suicide_state);
504 if (req == NULL) {
505 return NULL;
506 }
507 state->conn = conn;
508 SIVAL(state->buf, 4, 0x74697865);
509 SCVAL(state->buf, 8, exitcode);
510 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
511
512 state->iov.iov_base = state->buf;
513 state->iov.iov_len = sizeof(state->buf);
514
515 subreq = writev_send(state, ev, conn->outgoing, conn->write_fd,
516 false, &state->iov, 1);
517 if (tevent_req_nomem(subreq, req)) {
518 return tevent_req_post(req, ev);
519 }
520 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
521 return req;
522 }
523
524 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
525 {
526 struct tevent_req *req = tevent_req_callback_data(
527 subreq, struct tevent_req);
528 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
529 req, struct smbXcli_conn_samba_suicide_state);
530 ssize_t nwritten;
531 int err;
532
533 nwritten = writev_recv(subreq, &err);
534 TALLOC_FREE(subreq);
535 if (nwritten == -1) {
536 NTSTATUS status = map_nt_error_from_unix_common(err);
537 smbXcli_conn_disconnect(state->conn, status);
538 return;
539 }
540 tevent_req_done(req);
541 }
542
543 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
544 {
545 return tevent_req_simple_recv_ntstatus(req);
546 }
547
548 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
549 uint8_t exitcode)
550 {
551 TALLOC_CTX *frame = talloc_stackframe();
552 struct tevent_context *ev;
553 struct tevent_req *req;
554 NTSTATUS status = NT_STATUS_NO_MEMORY;
555 bool ok;
556
557 if (smbXcli_conn_has_async_calls(conn)) {
558 /*
559 * Can't use sync call while an async call is in flight
560 */
561 status = NT_STATUS_INVALID_PARAMETER_MIX;
562 goto fail;
563 }
564 ev = tevent_context_init(frame);
565 if (ev == NULL) {
566 goto fail;
567 }
568 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
569 if (req == NULL) {
570 goto fail;
571 }
572 ok = tevent_req_poll(req, ev);
573 if (!ok) {
574 status = map_nt_error_from_unix_common(errno);
575 goto fail;
576 }
577 status = smbXcli_conn_samba_suicide_recv(req);
578 fail:
579 TALLOC_FREE(frame);
580 return status;
581 }
582
583 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
584 {
585 return conn->smb1.capabilities;
586 }
587
588 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
589 {
590 return conn->smb1.max_xmit;
591 }
592
593 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
594 {
595 return conn->smb1.server.session_key;
596 }
597
598 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
599 {
600 return conn->smb1.server.challenge;
601 }
602
603 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
604 {
605 return conn->smb1.server.security_mode;
606 }
607
608 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
609 {
610 return conn->smb1.server.readbraw;
611 }
612
613 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
614 {
615 return conn->smb1.server.writebraw;
616 }
617
618 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
619 {
620 return conn->smb1.server.lockread;
621 }
622
623 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
624 {
625 return conn->smb1.server.writeunlock;
626 }
627
628 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
629 {
630 return conn->smb1.server.time_zone;
631 }
632
633 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
634 const DATA_BLOB user_session_key,
635 const DATA_BLOB response)
636 {
637 return smb_signing_activate(conn->smb1.signing,
638 user_session_key,
639 response);
640 }
641
642 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
643 const uint8_t *buf, uint32_t seqnum)
644 {
645 const uint8_t *hdr = buf + NBT_HDR_SIZE;
646 size_t len = smb_len_nbt(buf);
647
648 return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
649 }
650
651 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
652 {
653 return smb_signing_is_active(conn->smb1.signing);
654 }
655
656 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
657 struct smb_trans_enc_state *es)
658 {
659 /* Replace the old state, if any. */
660 if (conn->smb1.trans_enc) {
661 TALLOC_FREE(conn->smb1.trans_enc);
662 }
663 conn->smb1.trans_enc = es;
664 }
665
666 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
667 {
668 return common_encryption_on(conn->smb1.trans_enc);
669 }
670
671
672 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
673 {
674 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
675 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
676
677 if (NT_STATUS_IS_OK(status)) {
678 return NT_STATUS_OK;
679 }
680
681 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
682 return status;
683 }
684
685 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
686 }
687
688 /**
689 * Is the SMB command able to hold an AND_X successor
690 * @param[in] cmd The SMB command in question
691 * @retval Can we add a chained request after "cmd"?
692 */
693 bool smb1cli_is_andx_req(uint8_t cmd)
694 {
695 switch (cmd) {
696 case SMBtconX:
697 case SMBlockingX:
698 case SMBopenX:
699 case SMBreadX:
700 case SMBwriteX:
701 case SMBsesssetupX:
702 case SMBulogoffX:
703 case SMBntcreateX:
704 return true;
705 break;
706 default:
707 break;
708 }
709
710 return false;
711 }
712
713 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
714 {
715 size_t num_pending = talloc_array_length(conn->pending);
716 uint16_t result;
717
718 while (true) {
719 size_t i;
720
721 result = conn->smb1.mid++;
722 if ((result == 0) || (result == 0xffff)) {
723 continue;
724 }
725
726 for (i=0; i<num_pending; i++) {
727 if (result == smb1cli_req_mid(conn->pending[i])) {
728 break;
729 }
730 }
731
732 if (i == num_pending) {
733 return result;
734 }
735 }
736 }
737
738 void smbXcli_req_unset_pending(struct tevent_req *req)
739 {
740 struct smbXcli_req_state *state =
741 tevent_req_data(req,
742 struct smbXcli_req_state);
743 struct smbXcli_conn *conn = state->conn;
744 size_t num_pending = talloc_array_length(conn->pending);
745 size_t i;
746
747 if (state->smb1.mid != 0) {
748 /*
749 * This is a [nt]trans[2] request which waits
750 * for more than one reply.
751 */
752 return;
753 }
754
755 talloc_set_destructor(req, NULL);
756
757 if (num_pending == 1) {
758 /*
759 * The pending read_smb tevent_req is a child of
760 * conn->pending. So if nothing is pending anymore, we need to
761 * delete the socket read fde.
762 */
763 TALLOC_FREE(conn->pending);
764 conn->read_smb_req = NULL;
765 return;
766 }
767
768 for (i=0; i<num_pending; i++) {
769 if (req == conn->pending[i]) {
770 break;
771 }
772 }
773 if (i == num_pending) {
774 /*
775 * Something's seriously broken. Just returning here is the
776 * right thing nevertheless, the point of this routine is to
777 * remove ourselves from conn->pending.
778 */
779 return;
780 }
781
782 /*
783 * Remove ourselves from the conn->pending array
784 */
785 for (; i < (num_pending - 1); i++) {
786 conn->pending[i] = conn->pending[i+1];
787 }
788
789 /*
790 * No NULL check here, we're shrinking by sizeof(void *), and
791 * talloc_realloc just adjusts the size for this.
792 */
793 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
794 num_pending - 1);
795 return;
796 }
797
798 static int smbXcli_req_destructor(struct tevent_req *req)
799 {
800 struct smbXcli_req_state *state =
801 tevent_req_data(req,
802 struct smbXcli_req_state);
803
804 /*
805 * Make sure we really remove it from
806 * the pending array on destruction.
807 */
808 state->smb1.mid = 0;
809 smbXcli_req_unset_pending(req);
810 return 0;
811 }
812
813 static bool smb1cli_req_cancel(struct tevent_req *req);
814 static bool smb2cli_req_cancel(struct tevent_req *req);
815
816 static bool smbXcli_req_cancel(struct tevent_req *req)
817 {
818 struct smbXcli_req_state *state =
819 tevent_req_data(req,
820 struct smbXcli_req_state);
821
822 if (!smbXcli_conn_is_connected(state->conn)) {
823 return false;
824 }
825
826 if (state->conn->protocol == PROTOCOL_NONE) {
827 return false;
828 }
829
830 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
831 return smb2cli_req_cancel(req);
832 }
833
834 return smb1cli_req_cancel(req);
835 }
836
837 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
838
839 bool smbXcli_req_set_pending(struct tevent_req *req)
840 {
841 struct smbXcli_req_state *state =
842 tevent_req_data(req,
843 struct smbXcli_req_state);
844 struct smbXcli_conn *conn;
845 struct tevent_req **pending;
846 size_t num_pending;
847
848 conn = state->conn;
849
850 if (!smbXcli_conn_is_connected(conn)) {
851 return false;
852 }
853
854 num_pending = talloc_array_length(conn->pending);
855
856 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
857 num_pending+1);
858 if (pending == NULL) {
859 return false;
860 }
861 pending[num_pending] = req;
862 conn->pending = pending;
863 talloc_set_destructor(req, smbXcli_req_destructor);
864 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
865
866 if (!smbXcli_conn_receive_next(conn)) {
867 /*
868 * the caller should notify the current request
869 *
870 * And all other pending requests get notified
871 * by smbXcli_conn_disconnect().
872 */
873 smbXcli_req_unset_pending(req);
874 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
875 return false;
876 }
877
878 return true;
879 }
880
881 static void smbXcli_conn_received(struct tevent_req *subreq);
882
883 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
884 {
885 size_t num_pending = talloc_array_length(conn->pending);
886 struct tevent_req *req;
887 struct smbXcli_req_state *state;
888
889 if (conn->read_smb_req != NULL) {
890 return true;
891 }
892
893 if (num_pending == 0) {
894 if (conn->smb2.mid < UINT64_MAX) {
895 /* no more pending requests, so we are done for now */
896 return true;
897 }
898
899 /*
900 * If there are no more SMB2 requests possible,
901 * because we are out of message ids,
902 * we need to disconnect.
903 */
904 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
905 return true;
906 }
907
908 req = conn->pending[0];
909 state = tevent_req_data(req, struct smbXcli_req_state);
910
911 /*
912 * We're the first ones, add the read_smb request that waits for the
913 * answer from the server
914 */
915 conn->read_smb_req = read_smb_send(conn->pending,
916 state->ev,
917 conn->read_fd);
918 if (conn->read_smb_req == NULL) {
919 return false;
920 }
921 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
922 return true;
923 }
924
925 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
926 {
927 struct smbXcli_session *session;
928
929 tevent_queue_stop(conn->outgoing);
930
931 if (conn->read_fd != -1) {
932 close(conn->read_fd);
933 }
934 if (conn->write_fd != -1) {
935 close(conn->write_fd);
936 }
937 conn->read_fd = -1;
938 conn->write_fd = -1;
939
940 session = conn->sessions;
941 if (talloc_array_length(conn->pending) == 0) {
942 /*
943 * if we do not have pending requests
944 * there is no need to update the channel_sequence
945 */
946 session = NULL;
947 }
948 for (; session; session = session->next) {
949 smb2cli_session_increment_channel_sequence(session);
950 }
951
952 /*
953 * Cancel all pending requests. We do not do a for-loop walking
954 * conn->pending because that array changes in
955 * smbXcli_req_unset_pending.
956 */
957 while (talloc_array_length(conn->pending) > 0) {
958 struct tevent_req *req;
959 struct smbXcli_req_state *state;
960 struct tevent_req **chain;
961 size_t num_chained;
962 size_t i;
963
964 req = conn->pending[0];
965 state = tevent_req_data(req, struct smbXcli_req_state);
966
967 if (state->smb1.chained_requests == NULL) {
968 /*
969 * We're dead. No point waiting for trans2
970 * replies.
971 */
972 state->smb1.mid = 0;
973
974 smbXcli_req_unset_pending(req);
975
976 if (NT_STATUS_IS_OK(status)) {
977 /* do not notify the callers */
978 continue;
979 }
980
981 /*
982 * we need to defer the callback, because we may notify
983 * more then one caller.
984 */
985 tevent_req_defer_callback(req, state->ev);
986 tevent_req_nterror(req, status);
987 continue;
988 }
989
990 chain = talloc_move(conn, &state->smb1.chained_requests);
991 num_chained = talloc_array_length(chain);
992
993 for (i=0; i<num_chained; i++) {
994 req = chain[i];
995 state = tevent_req_data(req, struct smbXcli_req_state);
996
997 /*
998 * We're dead. No point waiting for trans2
999 * replies.
1000 */
1001 state->smb1.mid = 0;
1002
1003 smbXcli_req_unset_pending(req);
1004
1005 if (NT_STATUS_IS_OK(status)) {
1006 /* do not notify the callers */
1007 continue;
1008 }
1009
1010 /*
1011 * we need to defer the callback, because we may notify
1012 * more than one caller.
1013 */
1014 tevent_req_defer_callback(req, state->ev);
1015 tevent_req_nterror(req, status);
1016 }
1017 TALLOC_FREE(chain);
1018 }
1019 }
1020
1021 /*
1022 * Fetch a smb request's mid. Only valid after the request has been sent by
1023 * smb1cli_req_send().
1024 */
1025 uint16_t smb1cli_req_mid(struct tevent_req *req)
1026 {
1027 struct smbXcli_req_state *state =
1028 tevent_req_data(req,
1029 struct smbXcli_req_state);
1030
1031 if (state->smb1.mid != 0) {
1032 return state->smb1.mid;
1033 }
1034
1035 return SVAL(state->smb1.hdr, HDR_MID);
1036 }
1037
1038 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1039 {
1040 struct smbXcli_req_state *state =
1041 tevent_req_data(req,
1042 struct smbXcli_req_state);
1043
1044 state->smb1.mid = mid;
1045 }
1046
1047 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1048 {
1049 struct smbXcli_req_state *state =
1050 tevent_req_data(req,
1051 struct smbXcli_req_state);
1052
1053 return state->smb1.seqnum;
1054 }
1055
1056 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1057 {
1058 struct smbXcli_req_state *state =
1059 tevent_req_data(req,
1060 struct smbXcli_req_state);
1061
1062 state->smb1.seqnum = seqnum;
1063 }
1064
1065 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1066 {
1067 size_t result = 0;
1068 int i;
1069 for (i=0; i<count; i++) {
1070 result += iov[i].iov_len;
1071 }
1072 return result;
1073 }
1074
1075 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1076 const struct iovec *iov,
1077 int count)
1078 {
1079 size_t len = smbXcli_iov_len(iov, count);
1080 size_t copied;
1081 uint8_t *buf;
1082 int i;
1083
1084 buf = talloc_array(mem_ctx, uint8_t, len);
1085 if (buf == NULL) {
1086 return NULL;
1087 }
1088 copied = 0;
1089 for (i=0; i<count; i++) {
1090 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
1091 copied += iov[i].iov_len;
1092 }
1093 return buf;
1094 }
1095
1096 static void smb1cli_req_flags(enum protocol_types protocol,
1097 uint32_t smb1_capabilities,
1098 uint8_t smb_command,
1099 uint8_t additional_flags,
1100 uint8_t clear_flags,
1101 uint8_t *_flags,
1102 uint16_t additional_flags2,
1103 uint16_t clear_flags2,
1104 uint16_t *_flags2)
1105 {
1106 uint8_t flags = 0;
1107 uint16_t flags2 = 0;
1108
1109 if (protocol >= PROTOCOL_LANMAN1) {
1110 flags |= FLAG_CASELESS_PATHNAMES;
1111 flags |= FLAG_CANONICAL_PATHNAMES;
1112 }
1113
1114 if (protocol >= PROTOCOL_LANMAN2) {
1115 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1116 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1117 }
1118
1119 if (protocol >= PROTOCOL_NT1) {
1120 flags2 |= FLAGS2_IS_LONG_NAME;
1121
1122 if (smb1_capabilities & CAP_UNICODE) {
1123 flags2 |= FLAGS2_UNICODE_STRINGS;
1124 }
1125 if (smb1_capabilities & CAP_STATUS32) {
1126 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1127 }
1128 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1129 flags2 |= FLAGS2_EXTENDED_SECURITY;
1130 }
1131 }
1132
1133 flags |= additional_flags;
1134 flags &= ~clear_flags;
1135 flags2 |= additional_flags2;
1136 flags2 &= ~clear_flags2;
1137
1138 *_flags = flags;
1139 *_flags2 = flags2;
1140 }
1141
1142 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1143
1144 static bool smb1cli_req_cancel(struct tevent_req *req)
1145 {
1146 struct smbXcli_req_state *state =
1147 tevent_req_data(req,
1148 struct smbXcli_req_state);
1149 uint8_t flags;
1150 uint16_t flags2;
1151 uint32_t pid;
1152 uint16_t mid;
1153 struct tevent_req *subreq;
1154 NTSTATUS status;
1155
1156 flags = CVAL(state->smb1.hdr, HDR_FLG);
1157 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1158 pid = SVAL(state->smb1.hdr, HDR_PID);
1159 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1160 mid = SVAL(state->smb1.hdr, HDR_MID);
1161
1162 subreq = smb1cli_req_create(state, state->ev,
1163 state->conn,
1164 SMBntcancel,
1165 flags, 0,
1166 flags2, 0,
1167 0, /* timeout */
1168 pid,
1169 state->tcon,
1170 state->session,
1171 0, NULL, /* vwv */
1172 0, NULL); /* bytes */
1173 if (subreq == NULL) {
1174 return false;
1175 }
1176 smb1cli_req_set_mid(subreq, mid);
1177
1178 status = smb1cli_req_chain_submit(&subreq, 1);
1179 if (!NT_STATUS_IS_OK(status)) {
1180 TALLOC_FREE(subreq);
1181 return false;
1182 }
1183 smb1cli_req_set_mid(subreq, 0);
1184
1185 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1186
1187 return true;
1188 }
1189
1190 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1191 {
1192 /* we do not care about the result */
1193 TALLOC_FREE(subreq);
1194 }
1195
1196 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1197 struct tevent_context *ev,
1198 struct smbXcli_conn *conn,
1199 uint8_t smb_command,
1200 uint8_t additional_flags,
1201 uint8_t clear_flags,
1202 uint16_t additional_flags2,
1203 uint16_t clear_flags2,
1204 uint32_t timeout_msec,
1205 uint32_t pid,
1206 struct smbXcli_tcon *tcon,
1207 struct smbXcli_session *session,
1208 uint8_t wct, uint16_t *vwv,
1209 int iov_count,
1210 struct iovec *bytes_iov)
1211 {
1212 struct tevent_req *req;
1213 struct smbXcli_req_state *state;
1214 uint8_t flags = 0;
1215 uint16_t flags2 = 0;
1216 uint16_t uid = 0;
1217 uint16_t tid = 0;
1218
1219 if (iov_count > MAX_SMB_IOV) {
1220 /*
1221 * Should not happen :-)
1222 */
1223 return NULL;
1224 }
1225
1226 req = tevent_req_create(mem_ctx, &state,
1227 struct smbXcli_req_state);
1228 if (req == NULL) {
1229 return NULL;
1230 }
1231 state->ev = ev;
1232 state->conn = conn;
1233 state->session = session;
1234 state->tcon = tcon;
1235
1236 if (session) {
1237 uid = session->smb1.session_id;
1238 }
1239
1240 if (tcon) {
1241 tid = tcon->smb1.tcon_id;
1242 }
1243
1244 state->smb1.recv_cmd = 0xFF;
1245 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1246 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1247 if (state->smb1.recv_iov == NULL) {
1248 TALLOC_FREE(req);
1249 return NULL;
1250 }
1251
1252 smb1cli_req_flags(conn->protocol,
1253 conn->smb1.capabilities,
1254 smb_command,
1255 additional_flags,
1256 clear_flags,
1257 &flags,
1258 additional_flags2,
1259 clear_flags2,
1260 &flags2);
1261
1262 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1263 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1264 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1265 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1266 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1267 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1268 SSVAL(state->smb1.hdr, HDR_TID, tid);
1269 SSVAL(state->smb1.hdr, HDR_PID, pid);
1270 SSVAL(state->smb1.hdr, HDR_UID, uid);
1271 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1272 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1273
1274 state->smb1.vwv = vwv;
1275
1276 SSVAL(state->smb1.bytecount_buf, 0, smbXcli_iov_len(bytes_iov, iov_count));
1277
1278 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1279 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1280 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1281 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1282 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1283 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1284 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1285 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1286
1287 if (iov_count != 0) {
1288 memcpy(&state->smb1.iov[4], bytes_iov,
1289 iov_count * sizeof(*bytes_iov));
1290 }
1291 state->smb1.iov_count = iov_count + 4;
1292
1293 if (timeout_msec > 0) {
1294 struct timeval endtime;
1295
1296 endtime = timeval_current_ofs_msec(timeout_msec);
1297 if (!tevent_req_set_endtime(req, ev, endtime)) {
1298 return req;
1299 }
1300 }
1301
1302 switch (smb_command) {
1303 case SMBtranss:
1304 case SMBtranss2:
1305 case SMBnttranss:
1306 state->one_way = true;
1307 break;
1308 case SMBntcancel:
1309 state->one_way = true;
1310 state->smb1.one_way_seqnum = true;
1311 break;
1312 case SMBlockingX:
1313 if ((wct == 8) &&
1314 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1315 state->one_way = true;
1316 }
1317 break;
1318 }
1319
1320 return req;
1321 }
1322
1323 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1324 struct iovec *iov, int iov_count,
1325 uint32_t *seqnum,
1326 bool one_way_seqnum)
1327 {
1328 TALLOC_CTX *frame = NULL;
1329 uint8_t *buf;
1330
1331 /*
1332 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1333 * iovec directly. MD5Update would do that just fine.
1334 */
1335
1336 if (iov_count < 4) {
1337 return NT_STATUS_INVALID_PARAMETER_MIX;
1338 }
1339 if (iov[0].iov_len != NBT_HDR_SIZE) {
1340 return NT_STATUS_INVALID_PARAMETER_MIX;
1341 }
1342 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1343 return NT_STATUS_INVALID_PARAMETER_MIX;
1344 }
1345 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1346 return NT_STATUS_INVALID_PARAMETER_MIX;
1347 }
1348 if (iov[3].iov_len != sizeof(uint16_t)) {
1349 return NT_STATUS_INVALID_PARAMETER_MIX;
1350 }
1351
1352 frame = talloc_stackframe();
1353
1354 buf = smbXcli_iov_concat(frame, &iov[1], iov_count - 1);
1355 if (buf == NULL) {
1356 return NT_STATUS_NO_MEMORY;
1357 }
1358
1359 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1360 one_way_seqnum);
1361 smb_signing_sign_pdu(conn->smb1.signing,
1362 buf, talloc_get_size(buf),
1363 *seqnum);
1364 memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1365
1366 TALLOC_FREE(frame);
1367 return NT_STATUS_OK;
1368 }
1369
1370 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1371 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1372 TALLOC_CTX *tmp_mem,
1373 uint8_t *inbuf);
1374
1375 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1376 struct smbXcli_req_state *state,
1377 struct iovec *iov, int iov_count)
1378 {
1379 struct tevent_req *subreq;
1380 NTSTATUS status;
1381 uint8_t cmd;
1382 uint16_t mid;
1383
1384 if (!smbXcli_conn_is_connected(state->conn)) {
1385 return NT_STATUS_CONNECTION_DISCONNECTED;
1386 }
1387
1388 if (state->conn->protocol > PROTOCOL_NT1) {
1389 return NT_STATUS_REVISION_MISMATCH;
1390 }
1391
1392 if (iov_count < 4) {
1393 return NT_STATUS_INVALID_PARAMETER_MIX;
1394 }
1395 if (iov[0].iov_len != NBT_HDR_SIZE) {
1396 return NT_STATUS_INVALID_PARAMETER_MIX;
1397 }
1398 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1399 return NT_STATUS_INVALID_PARAMETER_MIX;
1400 }
1401 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1402 return NT_STATUS_INVALID_PARAMETER_MIX;
1403 }
1404 if (iov[3].iov_len != sizeof(uint16_t)) {
1405 return NT_STATUS_INVALID_PARAMETER_MIX;
1406 }
1407
1408 cmd = CVAL(iov[1].iov_base, HDR_COM);
1409 if (cmd == SMBreadBraw) {
1410 if (smbXcli_conn_has_async_calls(state->conn)) {
1411 return NT_STATUS_INVALID_PARAMETER_MIX;
1412 }
1413 state->conn->smb1.read_braw_req = req;
1414 }
1415
1416 if (state->smb1.mid != 0) {
1417 mid = state->smb1.mid;
1418 } else {
1419 mid = smb1cli_alloc_mid(state->conn);
1420 }
1421 SSVAL(iov[1].iov_base, HDR_MID, mid);
1422
1423 _smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
1424
1425 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1426 &state->smb1.seqnum,
1427 state->smb1.one_way_seqnum);
1428
1429 if (!NT_STATUS_IS_OK(status)) {
1430 return status;
1431 }
1432
1433 /*
1434 * If we supported multiple encrytion contexts
1435 * here we'd look up based on tid.
1436 */
1437 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1438 char *buf, *enc_buf;
1439
1440 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1441 if (buf == NULL) {
1442 return NT_STATUS_NO_MEMORY;
1443 }
1444 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1445 (char *)buf, &enc_buf);
1446 TALLOC_FREE(buf);
1447 if (!NT_STATUS_IS_OK(status)) {
1448 DEBUG(0, ("Error in encrypting client message: %s\n",
1449 nt_errstr(status)));
1450 return status;
1451 }
1452 buf = (char *)talloc_memdup(state, enc_buf,
1453 smb_len_nbt(enc_buf)+4);
1454 SAFE_FREE(enc_buf);
1455 if (buf == NULL) {
1456 return NT_STATUS_NO_MEMORY;
1457 }
1458 iov[0].iov_base = (void *)buf;
1459 iov[0].iov_len = talloc_get_size(buf);
1460 iov_count = 1;
1461 }
1462
1463 if (state->conn->dispatch_incoming == NULL) {
1464 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1465 }
1466
1467 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1468
1469 subreq = writev_send(state, state->ev, state->conn->outgoing,
1470 state->conn->write_fd, false, iov, iov_count);
1471 if (subreq == NULL) {
1472 return NT_STATUS_NO_MEMORY;
1473 }
1474 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1475 return NT_STATUS_OK;
1476 }
1477
1478 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1479 struct tevent_context *ev,
1480 struct smbXcli_conn *conn,
1481 uint8_t smb_command,
1482 uint8_t additional_flags,
1483 uint8_t clear_flags,
1484 uint16_t additional_flags2,
1485 uint16_t clear_flags2,
1486 uint32_t timeout_msec,
1487 uint32_t pid,
1488 struct smbXcli_tcon *tcon,
1489 struct smbXcli_session *session,
1490 uint8_t wct, uint16_t *vwv,
1491 uint32_t num_bytes,
1492 const uint8_t *bytes)
1493 {
1494 struct tevent_req *req;
1495 struct iovec iov;
1496 NTSTATUS status;
1497
1498 iov.iov_base = discard_const_p(void, bytes);
1499 iov.iov_len = num_bytes;
1500
1501 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1502 additional_flags, clear_flags,
1503 additional_flags2, clear_flags2,
1504 timeout_msec,
1505 pid, tcon, session,
1506 wct, vwv, 1, &iov);
1507 if (req == NULL) {
1508 return NULL;
1509 }
1510 if (!tevent_req_is_in_progress(req)) {
1511 return tevent_req_post(req, ev);
1512 }
1513 status = smb1cli_req_chain_submit(&req, 1);
1514 if (tevent_req_nterror(req, status)) {
1515 return tevent_req_post(req, ev);
1516 }
1517 return req;
1518 }
1519
1520 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1521 {
1522 struct tevent_req *req =
1523 tevent_req_callback_data(subreq,
1524 struct tevent_req);
1525 struct smbXcli_req_state *state =
1526 tevent_req_data(req,
1527 struct smbXcli_req_state);
1528 ssize_t nwritten;
1529 int err;
1530
1531 nwritten = writev_recv(subreq, &err);
1532 TALLOC_FREE(subreq);
1533 if (nwritten == -1) {
1534 NTSTATUS status = map_nt_error_from_unix_common(err);
1535 smbXcli_conn_disconnect(state->conn, status);
1536 return;
1537 }
1538
1539 if (state->one_way) {
1540 state->inbuf = NULL;
1541 tevent_req_done(req);
1542 return;
1543 }
1544
1545 if (!smbXcli_req_set_pending(req)) {
1546 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1547 return;
1548 }
1549 }
1550
1551 static void smbXcli_conn_received(struct tevent_req *subreq)
1552 {
1553 struct smbXcli_conn *conn =
1554 tevent_req_callback_data(subreq,
1555 struct smbXcli_conn);
1556 TALLOC_CTX *frame = talloc_stackframe();
1557 NTSTATUS status;
1558 uint8_t *inbuf;
1559 ssize_t received;
1560 int err;
1561
1562 if (subreq != conn->read_smb_req) {
1563 DEBUG(1, ("Internal error: cli_smb_received called with "
1564 "unexpected subreq\n"));
1565 status = NT_STATUS_INTERNAL_ERROR;
1566 smbXcli_conn_disconnect(conn, status);
1567 TALLOC_FREE(frame);
1568 return;
1569 }
1570 conn->read_smb_req = NULL;
1571
1572 received = read_smb_recv(subreq, frame, &inbuf, &err);
1573 TALLOC_FREE(subreq);
1574 if (received == -1) {
1575 status = map_nt_error_from_unix_common(err);
1576 smbXcli_conn_disconnect(conn, status);
1577 TALLOC_FREE(frame);
1578 return;
1579 }
1580
1581 status = conn->dispatch_incoming(conn, frame, inbuf);
1582 TALLOC_FREE(frame);
1583 if (NT_STATUS_IS_OK(status)) {
1584 /*
1585 * We should not do any more processing
1586 * as the dispatch function called
1587 * tevent_req_done().
1588 */
1589 return;
1590 } else if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1591 /*
1592 * We got an error, so notify all pending requests
1593 */
1594 smbXcli_conn_disconnect(conn, status);
1595 return;
1596 }
1597
1598 /*
1599 * We got NT_STATUS_RETRY, so we may ask for a
1600 * next incoming pdu.
1601 */
1602 if (!smbXcli_conn_receive_next(conn)) {
1603 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1604 }
1605 }
1606
1607 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1608 struct iovec **piov, int *pnum_iov)
1609 {
1610 struct iovec *iov;
1611 int num_iov;
1612 size_t buflen;
1613 size_t taken;
1614 size_t remaining;
1615 uint8_t *hdr;
1616 uint8_t cmd;
1617 uint32_t wct_ofs;
1618 NTSTATUS status;
1619 size_t min_size = MIN_SMB_SIZE;
1620
1621 buflen = smb_len_tcp(buf);
1622 taken = 0;
1623
1624 hdr = buf + NBT_HDR_SIZE;
1625
1626 status = smb1cli_pull_raw_error(hdr);
1627 if (NT_STATUS_IS_ERR(status)) {
1628 /*
1629 * This is an ugly hack to support OS/2
1630 * which skips the byte_count in the DATA block
1631 * on some error responses.
1632 *
1633 * See bug #9096
1634 */
1635 min_size -= sizeof(uint16_t);
1636 }
1637
1638 if (buflen < min_size) {
1639 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1640 }
1641
1642 /*
1643 * This returns iovec elements in the following order:
1644 *
1645 * - SMB header
1646 *
1647 * - Parameter Block
1648 * - Data Block
1649 *
1650 * - Parameter Block
1651 * - Data Block
1652 *
1653 * - Parameter Block
1654 * - Data Block
1655 */
1656 num_iov = 1;
1657
1658 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1659 if (iov == NULL) {
1660 return NT_STATUS_NO_MEMORY;
1661 }
1662 iov[0].iov_base = hdr;
1663 iov[0].iov_len = HDR_WCT;
1664 taken += HDR_WCT;
1665
1666 cmd = CVAL(hdr, HDR_COM);
1667 wct_ofs = HDR_WCT;
1668
1669 while (true) {
1670 size_t len = buflen - taken;
1671 struct iovec *cur;
1672 struct iovec *iov_tmp;
1673 uint8_t wct;
1674 uint32_t bcc_ofs;
1675 uint16_t bcc;
1676 size_t needed;
1677
1678 /*
1679 * we need at least WCT
1680 */
1681 needed = sizeof(uint8_t);
1682 if (len < needed) {
1683 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1684 __location__, (int)len, (int)needed));
1685 goto inval;
1686 }
1687
1688 /*
1689 * Now we check if the specified words are there
1690 */
1691 wct = CVAL(hdr, wct_ofs);
1692 needed += wct * sizeof(uint16_t);
1693 if (len < needed) {
1694 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1695 __location__, (int)len, (int)needed));
1696 goto inval;
1697 }
1698
1699 if ((num_iov == 1) &&
1700 (len == needed) &&
1701 NT_STATUS_IS_ERR(status))
1702 {
1703 /*
1704 * This is an ugly hack to support OS/2
1705 * which skips the byte_count in the DATA block
1706 * on some error responses.
1707 *
1708 * See bug #9096
1709 */
1710 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1711 num_iov + 2);
1712 if (iov_tmp == NULL) {
1713 TALLOC_FREE(iov);
1714 return NT_STATUS_NO_MEMORY;
1715 }
1716 iov = iov_tmp;
1717 cur = &iov[num_iov];
1718 num_iov += 2;
1719
1720 cur[0].iov_len = 0;
1721 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1722 cur[1].iov_len = 0;
1723 cur[1].iov_base = cur[0].iov_base;
1724
1725 taken += needed;
1726 break;
1727 }
1728
1729 /*
1730 * we need at least BCC
1731 */
1732 needed += sizeof(uint16_t);
1733 if (len < needed) {
1734 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1735 __location__, (int)len, (int)needed));
1736 goto inval;
1737 }
1738
1739 /*
1740 * Now we check if the specified bytes are there
1741 */
1742 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1743 bcc = SVAL(hdr, bcc_ofs);
1744 needed += bcc * sizeof(uint8_t);
1745 if (len < needed) {
1746 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1747 __location__, (int)len, (int)needed));
1748 goto inval;
1749 }
1750
1751 /*
1752 * we allocate 2 iovec structures for words and bytes
1753 */
1754 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1755 num_iov + 2);
1756 if (iov_tmp == NULL) {
1757 TALLOC_FREE(iov);
1758 return NT_STATUS_NO_MEMORY;
1759 }
1760 iov = iov_tmp;
1761 cur = &iov[num_iov];
1762 num_iov += 2;
1763
1764 cur[0].iov_len = wct * sizeof(uint16_t);
1765 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1766 cur[1].iov_len = bcc * sizeof(uint8_t);
1767 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1768
1769 taken += needed;
1770
1771 if (!smb1cli_is_andx_req(cmd)) {
1772 /*
1773 * If the current command does not have AndX chanining
1774 * we are done.
1775 */
1776 break;
1777 }
1778
1779 if (wct == 0 && bcc == 0) {
1780 /*
1781 * An empty response also ends the chain,
1782 * most likely with an error.
1783 */
1784 break;
1785 }
1786
1787 if (wct < 2) {
1788 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1789 __location__, (int)wct, (int)cmd));
1790 goto inval;
1791 }
1792 cmd = CVAL(cur[0].iov_base, 0);
1793 if (cmd == 0xFF) {
1794 /*
1795 * If it is the end of the chain we are also done.
1796 */
1797 break;
1798 }
1799 wct_ofs = SVAL(cur[0].iov_base, 2);
1800
1801 if (wct_ofs < taken) {
1802 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1803 }
1804 if (wct_ofs > buflen) {
1805 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1806 }
1807
1808 /*
1809 * we consumed everything up to the start of the next
1810 * parameter block.
1811 */
1812 taken = wct_ofs;
1813 }
1814
1815 remaining = buflen - taken;
1816
1817 if (remaining > 0 && num_iov >= 3) {
1818 /*
1819 * The last DATA block gets the remaining
1820 * bytes, this is needed to support
1821 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1822 */
1823 iov[num_iov-1].iov_len += remaining;
1824 }
1825
1826 *piov = iov;
1827 *pnum_iov = num_iov;
1828 return NT_STATUS_OK;
1829
1830 inval:
1831 TALLOC_FREE(iov);
1832 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1833 }
1834
1835 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1836 TALLOC_CTX *tmp_mem,
1837 uint8_t *inbuf)
1838 {
1839 struct tevent_req *req;
1840 struct smbXcli_req_state *state;
1841 NTSTATUS status;
1842 size_t num_pending;
1843 size_t i;
1844 uint8_t cmd;
1845 uint16_t mid;
1846 bool oplock_break;
1847 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1848 size_t len = smb_len_tcp(inbuf);
1849 struct iovec *iov = NULL;
1850 int num_iov = 0;
1851 struct tevent_req **chain = NULL;
1852 size_t num_chained = 0;
1853 size_t num_responses = 0;
1854
1855 if (conn->smb1.read_braw_req != NULL) {
1856 req = conn->smb1.read_braw_req;
1857 conn->smb1.read_braw_req = NULL;
1858 state = tevent_req_data(req, struct smbXcli_req_state);
1859
1860 smbXcli_req_unset_pending(req);
1861
1862 if (state->smb1.recv_iov == NULL) {
1863 /*
1864 * For requests with more than
1865 * one response, we have to readd the
1866 * recv_iov array.
1867 */
1868 state->smb1.recv_iov = talloc_zero_array(state,
1869 struct iovec,
1870 3);
1871 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1872 return NT_STATUS_OK;
1873 }
1874 }
1875
1876 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
1877 state->smb1.recv_iov[0].iov_len = len;
1878 ZERO_STRUCT(state->smb1.recv_iov[1]);
1879 ZERO_STRUCT(state->smb1.recv_iov[2]);
1880
1881 state->smb1.recv_cmd = SMBreadBraw;
1882 state->smb1.recv_status = NT_STATUS_OK;
1883 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1884
1885 tevent_req_done(req);
1886 return NT_STATUS_OK;
1887 }
1888
1889 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1890 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1891 DEBUG(10, ("Got non-SMB PDU\n"));
1892 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1893 }
1894
1895 /*
1896 * If we supported multiple encrytion contexts
1897 * here we'd look up based on tid.
1898 */
1899 if (common_encryption_on(conn->smb1.trans_enc)
1900 && (CVAL(inbuf, 0) == 0)) {
1901 uint16_t enc_ctx_num;
1902
1903 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1904 if (!NT_STATUS_IS_OK(status)) {
1905 DEBUG(10, ("get_enc_ctx_num returned %s\n",
1906 nt_errstr(status)));
1907 return status;
1908 }
1909
1910 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1911 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1912 enc_ctx_num,
1913 conn->smb1.trans_enc->enc_ctx_num));
1914 return NT_STATUS_INVALID_HANDLE;
1915 }
1916
1917 status = common_decrypt_buffer(conn->smb1.trans_enc,
1918 (char *)inbuf);
1919 if (!NT_STATUS_IS_OK(status)) {
1920 DEBUG(10, ("common_decrypt_buffer returned %s\n",
1921 nt_errstr(status)));
1922 return status;
1923 }
1924 inhdr = inbuf + NBT_HDR_SIZE;
1925 len = smb_len_nbt(inbuf);
1926 }
1927
1928 mid = SVAL(inhdr, HDR_MID);
1929 num_pending = talloc_array_length(conn->pending);
1930
1931 for (i=0; i<num_pending; i++) {
1932 if (mid == smb1cli_req_mid(conn->pending[i])) {
1933 break;
1934 }
1935 }
1936 if (i == num_pending) {
1937 /* Dump unexpected reply */
1938 return NT_STATUS_RETRY;
1939 }
1940
1941 oplock_break = false;
1942
1943 if (mid == 0xffff) {
1944 /*
1945 * Paranoia checks that this is really an oplock break request.
1946 */
1947 oplock_break = (len == 51); /* hdr + 8 words */
1948 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
1949 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
1950 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
1951 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
1952
1953 if (!oplock_break) {
1954 /* Dump unexpected reply */
1955 return NT_STATUS_RETRY;
1956 }
1957 }
1958
1959 req = conn->pending[i];
1960 state = tevent_req_data(req, struct smbXcli_req_state);
1961
1962 if (!oplock_break /* oplock breaks are not signed */
1963 && !smb_signing_check_pdu(conn->smb1.signing,
1964 inhdr, len, state->smb1.seqnum+1)) {
1965 DEBUG(10, ("cli_check_sign_mac failed\n"));
1966 return NT_STATUS_ACCESS_DENIED;
1967 }
1968
1969 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
1970 &iov, &num_iov);
1971 if (!NT_STATUS_IS_OK(status)) {
1972 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
1973 nt_errstr(status)));
1974 return status;
1975 }
1976
1977 cmd = CVAL(inhdr, HDR_COM);
1978 status = smb1cli_pull_raw_error(inhdr);
1979
1980 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
1981 (state->session != NULL) && state->session->disconnect_expired)
1982 {
1983 /*
1984 * this should be a short term hack
1985 * until the upper layers have implemented
1986 * re-authentication.
1987 */
1988 return status;
1989 }
1990
1991 if (state->smb1.chained_requests == NULL) {
1992 if (num_iov != 3) {
1993 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1994 }
1995
1996 smbXcli_req_unset_pending(req);
1997
1998 if (state->smb1.recv_iov == NULL) {
1999 /*
2000 * For requests with more than
2001 * one response, we have to readd the
2002 * recv_iov array.
2003 */
2004 state->smb1.recv_iov = talloc_zero_array(state,
2005 struct iovec,
2006 3);
2007 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2008 return NT_STATUS_OK;
2009 }
2010 }
2011
2012 state->smb1.recv_cmd = cmd;
2013 state->smb1.recv_status = status;
2014 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2015
2016 state->smb1.recv_iov[0] = iov[0];
2017 state->smb1.recv_iov[1] = iov[1];
2018 state->smb1.recv_iov[2] = iov[2];
2019
2020 if (talloc_array_length(conn->pending) == 0) {
2021 tevent_req_done(req);
2022 return NT_STATUS_OK;
2023 }
2024
2025 tevent_req_defer_callback(req, state->ev);
2026 tevent_req_done(req);
2027 return NT_STATUS_RETRY;
2028 }
2029
2030 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2031 num_chained = talloc_array_length(chain);
2032 num_responses = (num_iov - 1)/2;
2033
2034 if (num_responses > num_chained) {
2035 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2036 }
2037
2038 for (i=0; i<num_chained; i++) {
2039 size_t iov_idx = 1 + (i*2);
2040 struct iovec *cur = &iov[iov_idx];
2041 uint8_t *inbuf_ref;
2042
2043 req = chain[i];
2044 state = tevent_req_data(req, struct smbXcli_req_state);
2045
2046 smbXcli_req_unset_pending(req);
2047
2048 /*
2049 * as we finish multiple requests here
2050 * we need to defer the callbacks as
2051 * they could destroy our current stack state.
2052 */
2053 tevent_req_defer_callback(req, state->ev);
2054
2055 if (i >= num_responses) {
2056 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2057 continue;
2058 }
2059
2060 if (state->smb1.recv_iov == NULL) {
2061 /*
2062 * For requests with more than
2063 * one response, we have to readd the
2064 * recv_iov array.
2065 */
2066 state->smb1.recv_iov = talloc_zero_array(state,
2067 struct iovec,
2068 3);
2069 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2070 continue;
2071 }
2072 }
2073
2074 state->smb1.recv_cmd = cmd;
2075
2076 if (i == (num_responses - 1)) {
2077 /*
2078 * The last request in the chain gets the status
2079 */
2080 state->smb1.recv_status = status;
2081 } else {
2082 cmd = CVAL(cur[0].iov_base, 0);
2083 state->smb1.recv_status = NT_STATUS_OK;
2084 }
2085
2086 state->inbuf = inbuf;
2087
2088 /*
2089 * Note: here we use talloc_reference() in a way
2090 * that does not expose it to the caller.
2091 */
2092 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2093 if (tevent_req_nomem(inbuf_ref, req)) {
2094 continue;
2095 }
2096
2097 /* copy the related buffers */
2098 state->smb1.recv_iov[0] = iov[0];
2099 state->smb1.recv_iov[1] = cur[0];
2100 state->smb1.recv_iov[2] = cur[1];
2101
2102 tevent_req_done(req);
2103 }
2104
2105 return NT_STATUS_RETRY;
2106 }
2107
2108 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2109 TALLOC_CTX *mem_ctx,
2110 struct iovec **piov,
2111 uint8_t **phdr,
2112 uint8_t *pwct,
2113 uint16_t **pvwv,
2114 uint32_t *pvwv_offset,
2115 uint32_t *pnum_bytes,
2116 uint8_t **pbytes,
2117 uint32_t *pbytes_offset,
2118 uint8_t **pinbuf,
2119 const struct smb1cli_req_expected_response *expected,
2120 size_t num_expected)
2121 {
2122 struct smbXcli_req_state *state =
2123 tevent_req_data(req,
2124 struct smbXcli_req_state);
2125 NTSTATUS status = NT_STATUS_OK;
2126 struct iovec *recv_iov = NULL;
2127 uint8_t *hdr = NULL;
2128 uint8_t wct = 0;
2129 uint32_t vwv_offset = 0;
2130 uint16_t *vwv = NULL;
2131 uint32_t num_bytes = 0;
2132 uint32_t bytes_offset = 0;
2133 uint8_t *bytes = NULL;
2134 size_t i;
2135 bool found_status = false;
2136 bool found_size = false;
2137
2138 if (piov != NULL) {
2139 *piov = NULL;
2140 }
2141 if (phdr != NULL) {
2142 *phdr = 0;
2143 }
2144 if (pwct != NULL) {
2145 *pwct = 0;
2146 }
2147 if (pvwv != NULL) {
2148 *pvwv = NULL;
2149 }
2150 if (pvwv_offset != NULL) {
2151 *pvwv_offset = 0;
2152 }
2153 if (pnum_bytes != NULL) {
2154 *pnum_bytes = 0;
2155 }
2156 if (pbytes != NULL) {
2157 *pbytes = NULL;
2158 }
2159 if (pbytes_offset != NULL) {
2160 *pbytes_offset = 0;
2161 }
2162 if (pinbuf != NULL) {
2163 *pinbuf = NULL;
2164 }
2165
2166 if (state->inbuf != NULL) {
2167 recv_iov = state->smb1.recv_iov;
2168 state->smb1.recv_iov = NULL;
2169 if (state->smb1.recv_cmd != SMBreadBraw) {
2170 hdr = (uint8_t *)recv_iov[0].iov_base;
2171 wct = recv_iov[1].iov_len/2;
2172 vwv = (uint16_t *)recv_iov[1].iov_base;
2173 vwv_offset = PTR_DIFF(vwv, hdr);
2174 num_bytes = recv_iov[2].iov_len;
2175 bytes = (uint8_t *)recv_iov[2].iov_base;
2176 bytes_offset = PTR_DIFF(bytes, hdr);
2177 }
2178 }
2179
2180 if (tevent_req_is_nterror(req, &status)) {
2181 for (i=0; i < num_expected; i++) {
2182 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2183 found_status = true;
2184 break;
2185 }
2186 }
2187
2188 if (found_status) {
2189 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2190 }
2191
2192 return status;
2193 }
2194
2195 if (num_expected == 0) {
2196 found_status = true;
2197 found_size = true;
2198 }
2199
2200 status = state->smb1.recv_status;
2201
2202 for (i=0; i < num_expected; i++) {
2203 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2204 continue;
2205 }
2206
2207 found_status = true;
2208 if (expected[i].wct == 0) {
2209 found_size = true;
2210 break;
2211 }
2212
2213 if (expected[i].wct == wct) {
2214 found_size = true;
2215 break;
2216 }
2217 }
2218
2219 if (!found_status) {
2220 return status;
2221 }
2222
2223 if (!found_size) {
2224 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2225 }
2226
2227 if (piov != NULL) {
2228 *piov = talloc_move(mem_ctx, &recv_iov);
2229 }
2230
2231 if (phdr != NULL) {
2232 *phdr = hdr;
2233 }
2234 if (pwct != NULL) {
2235 *pwct = wct;
2236 }
2237 if (pvwv != NULL) {
2238 *pvwv = vwv;
2239 }
2240 if (pvwv_offset != NULL) {
2241 *pvwv_offset = vwv_offset;
2242 }
2243 if (pnum_bytes != NULL) {
2244 *pnum_bytes = num_bytes;
2245 }
2246 if (pbytes != NULL) {
2247 *pbytes = bytes;
2248 }
2249 if (pbytes_offset != NULL) {
2250 *pbytes_offset = bytes_offset;
2251 }
2252 if (pinbuf != NULL) {
2253 *pinbuf = state->inbuf;
2254 }
2255
2256 return status;
2257 }
2258
2259 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2260 {
2261 size_t wct_ofs;
2262 int i;
2263
2264 wct_ofs = HDR_WCT;
2265
2266 for (i=0; i<num_reqs; i++) {
2267 struct smbXcli_req_state *state;
2268 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2269 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2270 state->smb1.iov_count-2);
2271 wct_ofs = (wct_ofs + 3) & ~3;
2272 }
2273 return wct_ofs;
2274 }
2275
2276 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2277 {
2278 struct smbXcli_req_state *first_state =
2279 tevent_req_data(reqs[0],
2280 struct smbXcli_req_state);
2281 struct smbXcli_req_state *state;
2282 size_t wct_offset;
2283 size_t chain_padding = 0;
2284 int i, iovlen;
2285 struct iovec *iov = NULL;
2286 struct iovec *this_iov;
2287 NTSTATUS status;
2288 size_t nbt_len;
2289
2290 if (num_reqs == 1) {
2291 return smb1cli_req_writev_submit(reqs[0], first_state,
2292 first_state->smb1.iov,
2293 first_state->smb1.iov_count);
2294 }
2295
2296 iovlen = 0;
2297 for (i=0; i<num_reqs; i++) {
2298 if (!tevent_req_is_in_progress(reqs[i])) {
2299 return NT_STATUS_INTERNAL_ERROR;
2300 }
2301
2302 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2303
2304 if (state->smb1.iov_count < 4) {
2305 return NT_STATUS_INVALID_PARAMETER_MIX;
2306 }
2307
2308 if (i == 0) {
2309 /*
2310 * The NBT and SMB header
2311 */
2312 iovlen += 2;
2313 } else {
2314 /*
2315 * Chain padding
2316 */
2317 iovlen += 1;
2318 }
2319
2320 /*
2321 * words and bytes
2322 */
2323 iovlen += state->smb1.iov_count - 2;
2324 }
2325
2326 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2327 if (iov == NULL) {
2328 return NT_STATUS_NO_MEMORY;
2329 }
2330
2331 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2332 first_state, reqs, sizeof(*reqs) * num_reqs);
2333 if (first_state->smb1.chained_requests == NULL) {
2334 TALLOC_FREE(iov);
2335 return NT_STATUS_NO_MEMORY;
2336 }
2337
2338 wct_offset = HDR_WCT;
2339 this_iov = iov;
2340
2341 for (i=0; i<num_reqs; i++) {
2342 size_t next_padding = 0;
2343 uint16_t *vwv;
2344
2345 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2346
2347 if (i < num_reqs-1) {
2348 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2349 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2350 TALLOC_FREE(iov);
2351 TALLOC_FREE(first_state->smb1.chained_requests);
2352 return NT_STATUS_INVALID_PARAMETER_MIX;
2353 }
2354 }
2355
2356 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2357 state->smb1.iov_count-2) + 1;
2358 if ((wct_offset % 4) != 0) {
2359 next_padding = 4 - (wct_offset % 4);
2360 }
2361 wct_offset += next_padding;
2362 vwv = state->smb1.vwv;
2363
2364 if (i < num_reqs-1) {
2365 struct smbXcli_req_state *next_state =
2366 tevent_req_data(reqs[i+1],
2367 struct smbXcli_req_state);
2368 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2369 SCVAL(vwv+0, 1, 0);
2370 SSVAL(vwv+1, 0, wct_offset);
2371 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2372 /* properly end the chain */
2373 SCVAL(vwv+0, 0, 0xff);
2374 SCVAL(vwv+0, 1, 0xff);
2375 SSVAL(vwv+1, 0, 0);
2376 }
2377
2378 if (i == 0) {
2379 /*
2380 * The NBT and SMB header
2381 */
2382 this_iov[0] = state->smb1.iov[0];
2383 this_iov[1] = state->smb1.iov[1];
2384 this_iov += 2;
2385 } else {
2386 /*
2387 * This one is a bit subtle. We have to add
2388 * chain_padding bytes between the requests, and we
2389 * have to also include the wct field of the
2390 * subsequent requests. We use the subsequent header
2391 * for the padding, it contains the wct field in its
2392 * last byte.
2393 */
2394 this_iov[0].iov_len = chain_padding+1;
2395 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2396 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2397 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2398 this_iov += 1;
2399 }
2400
2401 /*
2402 * copy the words and bytes
2403 */
2404 memcpy(this_iov, state->smb1.iov+2,
2405 sizeof(struct iovec) * (state->smb1.iov_count-2));
2406 this_iov += state->smb1.iov_count - 2;
2407 chain_padding = next_padding;
2408 }
2409
2410 nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
2411 if (nbt_len > first_state->conn->smb1.max_xmit) {
2412 TALLOC_FREE(iov);
2413 TALLOC_FREE(first_state->smb1.chained_requests);
2414 return NT_STATUS_INVALID_PARAMETER_MIX;
2415 }
2416
2417 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2418 if (!NT_STATUS_IS_OK(status)) {
2419 TALLOC_FREE(iov);
2420 TALLOC_FREE(first_state->smb1.chained_requests);
2421 return status;
2422 }
2423
2424 return NT_STATUS_OK;
2425 }
2426
2427 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2428 {
2429 return ((tevent_queue_length(conn->outgoing) != 0)
2430 || (talloc_array_length(conn->pending) != 0));
2431 }
2432
2433 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2434 {
2435 return conn->smb2.server.capabilities;
2436 }
2437
2438 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2439 {
2440 return conn->smb2.server.security_mode;
2441 }
2442
2443 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2444 {
2445 return conn->smb2.server.max_trans_size;
2446 }
2447
2448 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2449 {
2450 return conn->smb2.server.max_read_size;
2451 }
2452
2453 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2454 {
2455 return conn->smb2.server.max_write_size;
2456 }
2457
2458 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2459 uint16_t max_credits)
2460 {
2461 conn->smb2.max_credits = max_credits;
2462 }
2463
2464 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2465
2466 static bool smb2cli_req_cancel(struct tevent_req *req)
2467 {
2468 struct smbXcli_req_state *state =
2469 tevent_req_data(req,
2470 struct smbXcli_req_state);
2471 uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2472 uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2473 uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
2474 struct smbXcli_tcon *tcon = state->tcon;
2475 struct smbXcli_session *session = state->session;
2476 uint8_t *fixed = state->smb2.pad;
2477 uint16_t fixed_len = 4;
2478 struct tevent_req *subreq;
2479 struct smbXcli_req_state *substate;
2480 NTSTATUS status;
2481
2482 SSVAL(fixed, 0, 0x04);
2483 SSVAL(fixed, 2, 0);
2484
2485 subreq = smb2cli_req_create(state, state->ev,
2486 state->conn,
2487 SMB2_OP_CANCEL,
2488 flags, 0,
2489 0, /* timeout */
2490 tcon, session,
2491 fixed, fixed_len,
2492 NULL, 0);
2493 if (subreq == NULL) {
2494 return false;
2495 }
2496 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2497
2498 /*
2499 * clear everything but the SMB2_HDR_FLAG_ASYNC flag
2500 * e.g. if SMB2_HDR_FLAG_CHAINED is set we get INVALID_PARAMETER back
2501 */
2502 flags &= SMB2_HDR_FLAG_ASYNC;
2503
2504 if (flags & SMB2_HDR_FLAG_ASYNC) {
2505 mid = 0;
2506 }
2507
2508 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
2509 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2510 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
2511
2512 status = smb2cli_req_compound_submit(&subreq, 1);
2513 if (!NT_STATUS_IS_OK(status)) {
2514 TALLOC_FREE(subreq);
2515 return false;
2516 }
2517
2518 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2519
2520 return true;
2521 }
2522
2523 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2524 {
2525 /* we do not care about the result */
2526 TALLOC_FREE(subreq);
2527 }
2528
2529 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2530 struct tevent_context *ev,
2531 struct smbXcli_conn *conn,
2532 uint16_t cmd,
2533 uint32_t additional_flags,
2534 uint32_t clear_flags,
2535 uint32_t timeout_msec,
2536 struct smbXcli_tcon *tcon,
2537 struct smbXcli_session *session,
2538 const uint8_t *fixed,
2539 uint16_t fixed_len,
2540 const uint8_t *dyn,
2541 uint32_t dyn_len)
2542 {
2543 struct tevent_req *req;
2544 struct smbXcli_req_state *state;
2545 uint32_t flags = 0;
2546 uint32_t tid = 0;
2547 uint64_t uid = 0;
2548 bool use_channel_sequence = false;
2549 uint16_t channel_sequence = 0;
2550
2551 req = tevent_req_create(mem_ctx, &state,
2552 struct smbXcli_req_state);
2553 if (req == NULL) {
2554 return NULL;
2555 }
2556
2557 state->ev = ev;
2558 state->conn = conn;
2559 state->session = session;
2560 state->tcon = tcon;
2561
2562 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2563 use_channel_sequence = true;
2564 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2565 use_channel_sequence = true;
2566 }
2567
2568 if (session) {
2569 uid = session->smb2->session_id;
2570
2571 if (use_channel_sequence) {
2572 channel_sequence = session->smb2->channel_sequence;
2573 }
2574
2575 state->smb2.should_sign = session->smb2->should_sign;
2576 state->smb2.should_encrypt = session->smb2->should_encrypt;
2577
2578 if (cmd == SMB2_OP_SESSSETUP &&
2579 session->smb2->signing_key.length != 0) {
2580 state->smb2.should_sign = true;
2581 }
2582
2583 if (cmd == SMB2_OP_SESSSETUP &&
2584 session->smb2_channel.signing_key.length == 0) {
2585 state->smb2.should_encrypt = false;
2586 }
2587 }
2588
2589 if (tcon) {
2590 tid = tcon->smb2.tcon_id;
2591
2592 if (tcon->smb2.should_encrypt) {
2593 state->smb2.should_encrypt = true;
2594 }
2595 }
2596
2597 if (state->smb2.should_encrypt) {
2598 state->smb2.should_sign = false;
2599 }
2600
2601 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2602 if (state->smb2.recv_iov == NULL) {
2603 TALLOC_FREE(req);
2604 return NULL;
2605 }
2606
2607 flags |= additional_flags;
2608 flags &= ~clear_flags;
2609
2610 state->smb2.fixed = fixed;
2611 state->smb2.fixed_len = fixed_len;
2612 state->smb2.dyn = dyn;
2613 state->smb2.dyn_len = dyn_len;
2614
2615 if (state->smb2.should_encrypt) {
2616 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2617 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2618 }
2619
2620 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
2621 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
2622 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
2623 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
2624 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
2625 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
2626 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
2627 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
2628
2629 switch (cmd) {
2630 case SMB2_OP_CANCEL:
2631 state->one_way = true;
2632 break;
2633 case SMB2_OP_BREAK:
2634 /*
2635 * If this is a dummy request, it will have
2636 * UINT64_MAX as message id.
2637 * If we send on break acknowledgement,
2638 * this gets overwritten later.
2639 */
2640 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2641 break;
2642 }
2643
2644 if (timeout_msec > 0) {
2645 struct timeval endtime;
2646
2647 endtime = timeval_current_ofs_msec(timeout_msec);
2648 if (!tevent_req_set_endtime(req, ev, endtime)) {
2649 return req;
2650 }
2651 }
2652
2653 return req;
2654 }
2655
2656 void smb2cli_req_set_notify_async(struct tevent_req *req)
2657 {
2658 struct smbXcli_req_state *state =
2659 tevent_req_data(req,
2660 struct smbXcli_req_state);
2661
2662 state->smb2.notify_async = true;
2663 }
2664
2665 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2666 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2667 TALLOC_CTX *tmp_mem,
2668 uint8_t *inbuf);
2669
2670 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2671 int num_reqs)
2672 {
2673 struct smbXcli_req_state *state;
2674 struct tevent_req *subreq;
2675 struct iovec *iov;
2676 int i, num_iov, nbt_len;
2677 int tf_iov = -1;
2678 const DATA_BLOB *encryption_key = NULL;
2679 uint64_t encryption_session_id = 0;
2680
2681 /*
2682 * 1 for the nbt length, optional TRANSFORM
2683 * per request: HDR, fixed, dyn, padding
2684 * -1 because the last one does not need padding
2685 */
2686
2687 iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
2688 if (iov == NULL) {
2689 return NT_STATUS_NO_MEMORY;
2690 }
2691
2692 num_iov = 1;
2693 nbt_len = 0;
2694
2695 /*
2696 * the session of the first request that requires encryption
2697 * specifies the encryption key.
2698 */
2699 for (i=0; i<num_reqs; i++) {
2700 if (!tevent_req_is_in_progress(reqs[i])) {
2701 return NT_STATUS_INTERNAL_ERROR;
2702 }
2703
2704 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2705
2706 if (!smbXcli_conn_is_connected(state->conn)) {
2707 return NT_STATUS_CONNECTION_DISCONNECTED;
2708 }
2709
2710 if ((state->conn->protocol != PROTOCOL_NONE) &&
2711 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2712 return NT_STATUS_REVISION_MISMATCH;
2713 }
2714
2715 if (state->session == NULL) {
2716 continue;
2717 }
2718
2719 if (!state->smb2.should_encrypt) {
2720 continue;
2721 }
2722
2723 encryption_key = &state->session->smb2->encryption_key;
2724 if (encryption_key->length == 0) {
2725 return NT_STATUS_INVALID_PARAMETER_MIX;
2726 }
2727
2728 encryption_session_id = state->session->smb2->session_id;
2729
2730 tf_iov = num_iov;
2731 iov[num_iov].iov_base = state->smb2.transform;
2732 iov[num_iov].iov_len = sizeof(state->smb2.transform);
2733 num_iov += 1;
2734
2735 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2736 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
2737 state->session->smb2->nonce_low);
2738 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
2739 state->session->smb2->nonce_high);
2740 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
2741 encryption_session_id);
2742
2743 state->session->smb2->nonce_low += 1;
2744 if (state->session->smb2->nonce_low == 0) {
2745 state->session->smb2->nonce_high += 1;
2746 state->session->smb2->nonce_low += 1;
2747 }
2748
2749 nbt_len += SMB2_TF_HDR_SIZE;
2750 break;
2751 }
2752
2753 for (i=0; i<num_reqs; i++) {
2754 int hdr_iov;
2755 size_t reqlen;
2756 bool ret;
2757 uint16_t opcode;
2758 uint64_t avail;
2759 uint16_t charge;
2760 uint16_t credits;
2761 uint64_t mid;
2762 const DATA_BLOB *signing_key = NULL;
2763
2764 if (!tevent_req_is_in_progress(reqs[i])) {
2765 return NT_STATUS_INTERNAL_ERROR;
2766 }
2767
2768 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2769
2770 if (!smbXcli_conn_is_connected(state->conn)) {
2771 return NT_STATUS_CONNECTION_DISCONNECTED;
2772 }
2773
2774 if ((state->conn->protocol != PROTOCOL_NONE) &&
2775 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2776 return NT_STATUS_REVISION_MISMATCH;
2777 }
2778
2779 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2780 if (opcode == SMB2_OP_CANCEL) {
2781 goto skip_credits;
2782 }
2783
2784 avail = UINT64_MAX - state->conn->smb2.mid;
2785 if (avail < 1) {
2786 return NT_STATUS_CONNECTION_ABORTED;
2787 }
2788
2789 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2790 charge = (MAX(state->smb2.dyn_len, 1) - 1)/ 65536 + 1;
2791 } else {
2792 charge = 1;
2793 }
2794
2795 charge = MAX(state->smb2.credit_charge, charge);
2796
2797 avail = MIN(avail, state->conn->smb2.cur_credits);
2798 if (avail < charge) {
2799 return NT_STATUS_INTERNAL_ERROR;
2800 }
2801
2802 credits = 0;
2803 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
2804 credits = state->conn->smb2.max_credits -
2805 state->conn->smb2.cur_credits;
2806 }
2807 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
2808 credits += 1;
2809 }
2810
2811 mid = state->conn->smb2.mid;
2812 state->conn->smb2.mid += charge;
2813 state->conn->smb2.cur_credits -= charge;
2814
2815 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2816 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
2817 }
2818 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
2819 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2820
2821 skip_credits:
2822 if (state->session && encryption_key == NULL) {
2823 /*
2824 * We prefer the channel signing key if it is
2825 * already there.
2826 */
2827 if (state->smb2.should_sign) {
2828 signing_key = &state->session->smb2_channel.signing_key;
2829 }
2830
2831 /*
2832 * If it is a channel binding, we already have the main
2833 * signing key and try that one.
2834 */
2835 if (signing_key && signing_key->length == 0) {
2836 signing_key = &state->session->smb2->signing_key;
2837 }
2838
2839 /*
2840 * If we do not have any session key yet, we skip the
2841 * signing of SMB2_OP_SESSSETUP requests.
2842 */
2843 if (signing_key && signing_key->length == 0) {
2844 signing_key = NULL;
2845 }
2846 }
2847
2848 hdr_iov = num_iov;
2849 iov[num_iov].iov_base = state->smb2.hdr;
2850 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
2851 num_iov += 1;
2852
2853 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2854 iov[num_iov].iov_len = state->smb2.fixed_len;
2855 num_iov += 1;
2856
2857 if (state->smb2.dyn != NULL) {
2858 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2859 iov[num_iov].iov_len = state->smb2.dyn_len;
2860 num_iov += 1;
2861 }
2862
2863 reqlen = sizeof(state->smb2.hdr);
2864 reqlen += state->smb2.fixed_len;
2865 reqlen += state->smb2.dyn_len;
2866
2867 if (i < num_reqs-1) {
2868 if ((reqlen % 8) > 0) {
2869 uint8_t pad = 8 - (reqlen % 8);
2870 iov[num_iov].iov_base = state->smb2.pad;
2871 iov[num_iov].iov_len = pad;
2872 num_iov += 1;
2873 reqlen += pad;
2874 }
2875 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
2876 }
2877
2878 state->smb2.encryption_session_id = encryption_session_id;
2879
2880 if (signing_key != NULL) {
2881 NTSTATUS status;
2882
2883 status = smb2_signing_sign_pdu(*signing_key,
2884 state->session->conn->protocol,
2885 &iov[hdr_iov], num_iov - hdr_iov);
2886 if (!NT_STATUS_IS_OK(status)) {
2887 return status;
2888 }
2889 }
2890
2891 nbt_len += reqlen;
2892
2893 ret = smbXcli_req_set_pending(reqs[i]);
2894 if (!ret) {
2895 return NT_STATUS_NO_MEMORY;
2896 }
2897 }
2898
2899 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
2900 _smb_setlen_tcp(state->length_hdr, nbt_len);
2901 iov[0].iov_base = state->length_hdr;
2902 iov[0].iov_len = sizeof(state->length_hdr);
2903
2904 if (encryption_key != NULL) {
2905 NTSTATUS status;
2906 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
2907 uint8_t *buf;
2908 int vi;
2909
2910 buf = talloc_array(iov, uint8_t, buflen);
2911 if (buf == NULL) {
2912 return NT_STATUS_NO_MEMORY;
2913 }
2914
2915 /*
2916 * We copy the buffers before encrypting them,
2917 * this is at least currently needed for the
2918 * to keep state->smb2.hdr.
2919 *
2920 * Also the callers may expect there buffers
2921 * to be const.
2922 */
2923 for (vi = tf_iov + 1; vi < num_iov; vi++) {
2924 struct iovec *v = &iov[vi];
2925 const uint8_t *o = (const uint8_t *)v->iov_base;
2926
2927 memcpy(buf, o, v->iov_len);
2928 v->iov_base = (void *)buf;
2929 buf += v->iov_len;
2930 }
2931
2932 status = smb2_signing_encrypt_pdu(*encryption_key,
2933 state->conn->protocol,
2934 &iov[tf_iov], num_iov - tf_iov);
2935 if (!NT_STATUS_IS_OK(status)) {
2936 return status;
2937 }
2938 }
2939
2940 if (state->conn->dispatch_incoming == NULL) {
2941 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
2942 }
2943
2944 subreq = writev_send(state, state->ev, state->conn->outgoing,
2945 state->conn->write_fd, false, iov, num_iov);
2946 if (subreq == NULL) {
2947 return NT_STATUS_NO_MEMORY;
2948 }
2949 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
2950 return NT_STATUS_OK;
2951 }
2952
2953 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
2954 {
2955 struct smbXcli_req_state *state =
2956 tevent_req_data(req,
2957 struct smbXcli_req_state);
2958
2959 state->smb2.credit_charge = charge;
2960 }
2961
2962 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
2963 struct tevent_context *ev,
2964 struct smbXcli_conn *conn,
2965 uint16_t cmd,
2966 uint32_t additional_flags,
2967 uint32_t clear_flags,
2968 uint32_t timeout_msec,
2969 struct smbXcli_tcon *tcon,
2970 struct smbXcli_session *session,
2971 const uint8_t *fixed,
2972 uint16_t fixed_len,
2973 const uint8_t *dyn,
2974 uint32_t dyn_len)
2975 {
2976 struct tevent_req *req;
2977 NTSTATUS status;
2978
2979 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
2980 additional_flags, clear_flags,
2981 timeout_msec,
2982 tcon, session,
2983 fixed, fixed_len, dyn, dyn_len);
2984 if (req == NULL) {
2985 return NULL;
2986 }
2987 if (!tevent_req_is_in_progress(req)) {
2988 return tevent_req_post(req, ev);
2989 }
2990 status = smb2cli_req_compound_submit(&req, 1);
2991 if (tevent_req_nterror(req, status)) {
2992 return tevent_req_post(req, ev);
2993 }
2994 return req;
2995 }
2996
2997 static void smb2cli_req_writev_done(struct tevent_req *subreq)
2998 {
2999 struct tevent_req *req =
3000 tevent_req_callback_data(subreq,
3001 struct tevent_req);
3002 struct smbXcli_req_state *state =
3003 tevent_req_data(req,
3004 struct smbXcli_req_state);
3005 ssize_t nwritten;
3006 int err;
3007
3008 nwritten = writev_recv(subreq, &err);
3009 TALLOC_FREE(subreq);
3010 if (nwritten == -1) {
3011 /* here, we need to notify all pending requests */
3012 NTSTATUS status = map_nt_error_from_unix_common(err);
3013 smbXcli_conn_disconnect(state->conn, status);
3014 return;
3015 }
3016 }
3017
3018 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3019 uint8_t *buf,
3020 size_t buflen,
3021 TALLOC_CTX *mem_ctx,
3022 struct iovec **piov, int *pnum_iov)
3023 {
3024 struct iovec *iov;
3025 int num_iov = 0;
3026 size_t taken = 0;
3027 uint8_t *first_hdr = buf;
3028 size_t verified_buflen = 0;
3029 uint8_t *tf = NULL;
3030 size_t tf_len = 0;
3031
3032 iov = talloc_array(mem_ctx, struct iovec, num_iov);
3033 if (iov == NULL) {
3034 return NT_STATUS_NO_MEMORY;
3035 }
3036
3037 while (taken < buflen) {
3038 size_t len = buflen - taken;
3039 uint8_t *hdr = first_hdr + taken;
3040 struct iovec *cur;
3041 size_t full_size;
3042 size_t next_command_ofs;
3043 uint16_t body_size;
3044 struct iovec *iov_tmp;
3045
3046 if (verified_buflen > taken) {
3047 len = verified_buflen - taken;
3048 } else {
3049 tf = NULL;
3050 tf_len = 0;
3051 }
3052
3053 if (len < 4) {
3054 DEBUG(10, ("%d bytes left, expected at least %d\n",
3055 (int)len, 4));
3056 goto inval;
3057 }
3058 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3059 struct smbXcli_session *s;
3060 uint64_t uid;
3061 struct iovec tf_iov[2];
3062 size_t enc_len;
3063 NTSTATUS status;
3064
3065 if (len < SMB2_TF_HDR_SIZE) {
3066 DEBUG(10, ("%d bytes left, expected at least %d\n",
3067 (int)len, SMB2_TF_HDR_SIZE));
3068 goto inval;
3069 }
3070 tf = hdr;
3071 tf_len = SMB2_TF_HDR_SIZE;
3072 taken += tf_len;
3073
3074 hdr = first_hdr + taken;
3075 enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3076 uid = BVAL(tf, SMB2_TF_SESSION_ID);
3077
3078 if (len < SMB2_TF_HDR_SIZE + enc_len) {
3079 DEBUG(10, ("%d bytes left, expected at least %d\n",
3080 (int)len,
3081 (int)(SMB2_TF_HDR_SIZE + enc_len)));
3082 goto inval;
3083 }
3084
3085 s = conn->sessions;
3086 for (; s; s = s->next) {
3087 if (s->smb2->session_id != uid) {
3088 continue;
3089 }
3090 break;
3091 }
3092
3093 if (s == NULL) {
3094 DEBUG(10, ("unknown session_id %llu\n",
3095 (unsigned long long)uid));
3096 goto inval;
3097 }
3098
3099 tf_iov[0].iov_base = (void *)tf;
3100 tf_iov[0].iov_len = tf_len;
3101 tf_iov[1].iov_base = (void *)hdr;
3102 tf_iov[1].iov_len = enc_len;
3103
3104 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3105 conn->protocol,
3106 tf_iov, 2);
3107 if (!NT_STATUS_IS_OK(status)) {
3108 TALLOC_FREE(iov);
3109 return status;
3110 }
3111
3112 verified_buflen = taken + enc_len;
3113 len = enc_len;
3114 }
3115
3116 /*
3117 * We need the header plus the body length field
3118 */
3119
3120 if (len < SMB2_HDR_BODY + 2) {
3121 DEBUG(10, ("%d bytes left, expected at least %d\n",
3122 (int)len, SMB2_HDR_BODY));
3123 goto inval;
3124 }
3125 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3126 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3127 IVAL(hdr, 0)));
3128 goto inval;
3129 }
3130 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3131 DEBUG(10, ("Got HDR len %d, expected %d\n",
3132 SVAL(hdr, 4), SMB2_HDR_BODY));
3133 goto inval;
3134 }
3135
3136 full_size = len;
3137 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3138 body_size = SVAL(hdr, SMB2_HDR_BODY);
3139
3140 if (next_command_ofs != 0) {
3141 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3142 goto inval;
3143 }
3144 if (next_command_ofs > full_size) {
3145 goto inval;
3146 }
3147 full_size = next_command_ofs;
3148 }
3149 if (body_size < 2) {
3150 goto inval;
3151 }
3152 body_size &= 0xfffe;
3153
3154 if (body_size > (full_size - SMB2_HDR_BODY)) {
3155 goto inval;
3156 }
3157
3158 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3159 num_iov + 4);
3160 if (iov_tmp == NULL) {
3161 TALLOC_FREE(iov);
3162 return NT_STATUS_NO_MEMORY;
3163 }
3164 iov = iov_tmp;
3165 cur = &iov[num_iov];
3166 num_iov += 4;
3167
3168 cur[0].iov_base = tf;
3169 cur[0].iov_len = tf_len;
3170 cur[1].iov_base = hdr;
3171 cur[1].iov_len = SMB2_HDR_BODY;
3172 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3173 cur[2].iov_len = body_size;
3174 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3175 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3176
3177 taken += full_size;
3178 }
3179
3180 *piov = iov;
3181 *pnum_iov = num_iov;
3182 return NT_STATUS_OK;
3183
3184 inval:
3185 TALLOC_FREE(iov);
3186 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3187 }
3188
3189 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3190 uint64_t mid)
3191 {
3192 size_t num_pending = talloc_array_length(conn->pending);
3193 size_t i;
3194
3195 for (i=0; i<num_pending; i++) {
3196 struct tevent_req *req = conn->pending[i];
3197 struct smbXcli_req_state *state =
3198 tevent_req_data(req,
3199 struct smbXcli_req_state);
3200
3201 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3202 return req;
3203 }
3204 }
3205 return NULL;
3206 }
3207
3208 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3209 TALLOC_CTX *tmp_mem,
3210 uint8_t *inbuf)
3211 {
3212 struct tevent_req *req;
3213 struct smbXcli_req_state *state = NULL;
3214 struct iovec *iov;
3215 int i, num_iov;
3216 NTSTATUS status;
3217 bool defer = true;
3218 struct smbXcli_session *last_session = NULL;
3219 size_t inbuf_len = smb_len_tcp(inbuf);
3220
3221 status = smb2cli_inbuf_parse_compound(conn,
3222 inbuf + NBT_HDR_SIZE,
3223 inbuf_len,
3224 tmp_mem,
3225 &iov, &num_iov);
3226 if (!NT_STATUS_IS_OK(status)) {
3227 return status;
3228 }
3229
3230 for (i=0; i<num_iov; i+=4) {
3231 uint8_t *inbuf_ref = NULL;
3232 struct iovec *cur = &iov[i];
3233 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3234 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3235 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3236 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3237 uint16_t req_opcode;
3238 uint32_t req_flags;
3239 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3240 uint32_t new_credits;
3241 struct smbXcli_session *session = NULL;
3242 const DATA_BLOB *signing_key = NULL;
3243 bool was_encrypted = false;
3244
3245 new_credits = conn->smb2.cur_credits;
3246 new_credits += credits;
3247 if (new_credits > UINT16_MAX) {
3248 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3249 }
3250 conn->smb2.cur_credits += credits;
3251
3252 req = smb2cli_conn_find_pending(conn, mid);
3253 if (req == NULL) {
3254 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3255 }
3256 state = tevent_req_data(req, struct smbXcli_req_state);
3257
3258 state->smb2.got_async = false;
3259
3260 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3261 if (opcode != req_opcode) {
3262 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3263 }
3264 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3265
3266 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3267 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3268 }
3269
3270 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3271 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3272 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3273 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3274
3275 /*
3276 * async interim responses are not signed,
3277 * even if the SMB2_HDR_FLAG_SIGNED flag
3278 * is set.
3279 */
3280 req_flags |= SMB2_HDR_FLAG_ASYNC;
3281 SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
3282 SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
3283
3284 if (state->smb2.notify_async) {
3285 state->smb2.got_async = true;
3286 tevent_req_defer_callback(req, state->ev);
3287 tevent_req_notify_callback(req);
3288 }
3289 continue;
3290 }
3291
3292 session = state->session;
3293 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3294 session = last_session;
3295 }
3296 last_session = session;
3297
3298 if (state->smb2.should_sign) {
3299 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3300 return NT_STATUS_ACCESS_DENIED;
3301 }
3302 }
3303
3304 if (flags & SMB2_HDR_FLAG_SIGNED) {
3305 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3306
3307 if (session == NULL) {
3308 struct smbXcli_session *s;
3309
3310 s = state->conn->sessions;
3311 for (; s; s = s->next) {
3312 if (s->smb2->session_id != uid) {
3313 continue;
3314 }
3315
3316 session = s;
3317 break;
3318 }
3319 }
3320
3321 if (session == NULL) {
3322 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3323 }
3324
3325 last_session = session;
3326 signing_key = &session->smb2_channel.signing_key;
3327 }
3328
3329 if (opcode == SMB2_OP_SESSSETUP) {
3330 /*
3331 * We prefer the channel signing key, if it is
3332 * already there.
3333 *
3334 * If we do not have a channel signing key yet,
3335 * we try the main signing key, if it is not
3336 * the final response.
3337 */
3338 if (signing_key && signing_key->length == 0 &&
3339 !NT_STATUS_IS_OK(status)) {
3340 signing_key = &session->smb2->signing_key;
3341 }
3342
3343 if (signing_key && signing_key->length == 0) {
3344 /*
3345 * If we do not have a session key to
3346 * verify the signature, we defer the
3347 * signing check to the caller.
3348 *
3349 * The caller gets NT_STATUS_OK, it
3350 * has to call
3351 * smb2cli_session_set_session_key()
3352 * or
3353 * smb2cli_session_set_channel_key()
3354 * which will check the signature
3355 * with the channel signing key.
3356 */
3357 signing_key = NULL;
3358 }
3359 }
3360
3361 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3362 const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3363 uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3364
3365 /*
3366 * If the response was encrypted in a SMB2_TRANSFORM
3367 * pdu, which belongs to the correct session,
3368 * we do not need to do signing checks
3369 *
3370 * It could be the session the response belongs to
3371 * or the session that was used to encrypt the
3372 * SMB2_TRANSFORM request.
3373 */
3374 if ((session && session->smb2->session_id == uid) ||
3375 (state->smb2.encryption_session_id == uid)) {
3376 signing_key = NULL;
3377 was_encrypted = true;
3378 }
3379 }
3380
3381 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3382 /*
3383 * if the server returns NT_STATUS_USER_SESSION_DELETED
3384 * the response is not signed and we should
3385 * propagate the NT_STATUS_USER_SESSION_DELETED
3386 * status to the caller.
3387 */
3388 state->smb2.signing_skipped = true;
3389 signing_key = NULL;
3390 }
3391
3392 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3393 /*
3394 * if the server returns
3395 * NT_STATUS_INVALID_PARAMETER
3396 * the response might not be encrypted.
3397 */
3398 if (state->smb2.should_encrypt && !was_encrypted) {
3399 state->smb2.signing_skipped = true;
3400 signing_key = NULL;
3401 }
3402 }
3403
3404 if (state->smb2.should_encrypt && !was_encrypted) {
3405 if (!state->smb2.signing_skipped) {
3406 return NT_STATUS_ACCESS_DENIED;
3407 }
3408 }
3409
3410 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3411 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3412 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3413 /*
3414 * if the server returns
3415 * NT_STATUS_NETWORK_NAME_DELETED
3416 * NT_STATUS_FILE_CLOSED
3417 * NT_STATUS_INVALID_PARAMETER
3418 * the response might not be signed
3419 * as this happens before the signing checks.
3420 *
3421 * If server echos the signature (or all zeros)
3422 * we should report the status from the server
3423 * to the caller.
3424 */
3425 if (signing_key) {
3426 int cmp;
3427
3428 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3429 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3430 16);
3431 if (cmp == 0) {
3432 state->smb2.signing_skipped = true;
3433 signing_key = NULL;
3434 }
3435 }
3436 if (signing_key) {
3437 int cmp;
3438 static const uint8_t zeros[16];
3439
3440 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3441 zeros,
3442 16);
3443 if (cmp == 0) {
3444 state->smb2.signing_skipped = true;
3445 signing_key = NULL;
3446 }
3447 }
3448 }
3449
3450 if (signing_key) {
3451 status = smb2_signing_check_pdu(*signing_key,
3452 state->conn->protocol,
3453 &cur[1], 3);
3454 if (!NT_STATUS_IS_OK(status)) {
3455 /*
3456 * If the signing check fails, we disconnect
3457 * the connection.
3458 */
3459 return status;
3460 }
3461 }
3462
3463 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
3464 (session != NULL) && session->disconnect_expired)
3465 {
3466 /*
3467 * this should be a short term hack
3468 * until the upper layers have implemented
3469 * re-authentication.
3470 */
3471 return status;
3472 }
3473
3474 smbXcli_req_unset_pending(req);
3475
3476 /*
3477 * There might be more than one response
3478 * we need to defer the notifications
3479 */
3480 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3481 defer = false;
3482 }
3483
3484 if (defer) {
3485 tevent_req_defer_callback(req, state->ev);
3486 }
3487
3488 /*
3489 * Note: here we use talloc_reference() in a way
3490 * that does not expose it to the caller.
3491 */
3492 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3493 if (tevent_req_nomem(inbuf_ref, req)) {
3494 continue;
3495 }
3496
3497 /* copy the related buffers */
3498 state->smb2.recv_iov[0] = cur[1];
3499 state->smb2.recv_iov[1] = cur[2];
3500 state->smb2.recv_iov[2] = cur[3];
3501
3502 tevent_req_done(req);
3503 }
3504
3505 if (defer) {
3506 return NT_STATUS_RETRY;
3507 }
3508
3509 return NT_STATUS_OK;
3510 }
3511
3512 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3513 struct iovec **piov,
3514 const struct smb2cli_req_expected_response *expected,
3515 size_t num_expected)
3516 {
3517 struct smbXcli_req_state *state =
3518 tevent_req_data(req,
3519 struct smbXcli_req_state);
3520 NTSTATUS status;
3521 size_t body_size;
3522 bool found_status = false;
3523 bool found_size = false;
3524 size_t i;
3525
3526 if (piov != NULL) {
3527 *piov = NULL;
3528 }
3529
3530 if (state->smb2.got_async) {
3531 return STATUS_PENDING;
3532 }
3533
3534 if (tevent_req_is_nterror(req, &status)) {
3535 for (i=0; i < num_expected; i++) {
3536 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3537 found_status = true;
3538 break;
3539 }
3540 }
3541
3542 if (found_status) {
3543 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3544 }
3545
3546 return status;
3547 }
3548
3549 if (num_expected == 0) {
3550 found_status = true;
3551 found_size = true;
3552 }
3553
3554 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3555 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3556
3557 for (i=0; i < num_expected; i++) {
3558 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3559 continue;
3560 }
3561
3562 found_status = true;
3563 if (expected[i].body_size == 0) {
3564 found_size = true;
3565 break;
3566 }
3567
3568 if (expected[i].body_size == body_size) {
3569 found_size = true;
3570 break;
3571 }
3572 }
3573
3574 if (!found_status) {
3575 return status;
3576 }
3577
3578 if (state->smb2.signing_skipped) {
3579 if (num_expected > 0) {
3580 return NT_STATUS_ACCESS_DENIED;
3581 }
3582 if (!NT_STATUS_IS_ERR(status)) {
3583 return NT_STATUS_ACCESS_DENIED;
3584 }
3585 }
3586
3587 if (!found_size) {
3588 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3589 }
3590
3591 if (piov != NULL) {
3592 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3593 }
3594
3595 return status;
3596 }
3597
3598 static const struct {
3599 enum protocol_types proto;
3600 const char *smb1_name;
3601 } smb1cli_prots[] = {
3602 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
3603 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
3604 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
3605 {PROTOCOL_LANMAN1, "LANMAN1.0"},
3606 {PROTOCOL_LANMAN2, "LM1.2X002"},
3607 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
3608 {PROTOCOL_LANMAN2, "LANMAN2.1"},
3609 {PROTOCOL_LANMAN2, "Samba"},
3610 {PROTOCOL_NT1, "NT LANMAN 1.0"},
3611 {PROTOCOL_NT1, "NT LM 0.12"},
3612 {PROTOCOL_SMB2_02, "SMB 2.002"},
3613 {PROTOCOL_SMB2_10, "SMB 2.???"},
3614 };
3615
3616 static const struct {
3617 enum protocol_types proto;
3618 uint16_t smb2_dialect;
3619 } smb2cli_prots[] = {
3620 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
3621 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
3622 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
3623 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
3624 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
3625 };
3626
3627 struct smbXcli_negprot_state {
3628 struct smbXcli_conn *conn;
3629 struct tevent_context *ev;
3630 uint32_t timeout_msec;
3631 enum protocol_types min_protocol;
3632 enum protocol_types max_protocol;
3633
3634 struct {
3635 uint8_t fixed[36];
3636 uint8_t dyn[ARRAY_SIZE(smb2cli_prots)*2];
3637 } smb2;
3638 };
3639
3640 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3641 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3642 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3643 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3644 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3645 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3646 TALLOC_CTX *frame,
3647 uint8_t *inbuf);
3648
3649 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3650 struct tevent_context *ev,
3651 struct smbXcli_conn *conn,
3652 uint32_t timeout_msec,
3653 enum protocol_types min_protocol,
3654 enum protocol_types max_protocol)
3655 {
3656 struct tevent_req *req, *subreq;
3657 struct smbXcli_negprot_state *state;
3658
3659 req = tevent_req_create(mem_ctx, &state,
3660 struct smbXcli_negprot_state);
3661 if (req == NULL) {
3662 return NULL;
3663 }
3664 state->conn = conn;
3665 state->ev = ev;
3666 state->timeout_msec = timeout_msec;
3667 state->min_protocol = min_protocol;
3668 state->max_protocol = max_protocol;
3669
3670 if (min_protocol == PROTOCOL_NONE) {
3671 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3672 return tevent_req_post(req, ev);
3673 }
3674
3675 if (max_protocol == PROTOCOL_NONE) {
3676 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3677 return tevent_req_post(req, ev);
3678 }
3679
3680 if (min_protocol > max_protocol) {
3681 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3682 return tevent_req_post(req, ev);
3683 }
3684
3685 if ((min_protocol < PROTOCOL_SMB2_02) &&
3686 (max_protocol < PROTOCOL_SMB2_02)) {
3687 /*
3688 * SMB1 only...
3689 */
3690 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3691
3692 subreq = smbXcli_negprot_smb1_subreq(state);
3693 if (tevent_req_nomem(subreq, req)) {
3694 return tevent_req_post(req, ev);
3695 }
3696 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3697 return req;
3698 }
3699
3700 if ((min_protocol >= PROTOCOL_SMB2_02) &&
3701 (max_protocol >= PROTOCOL_SMB2_02)) {
3702 /*
3703 * SMB2 only...
3704 */
3705 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3706
3707 subreq = smbXcli_negprot_smb2_subreq(state);
3708 if (tevent_req_nomem(subreq, req)) {
3709 return tevent_req_post(req, ev);
3710 }
3711 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3712 return req;
3713 }
3714
3715 /*
3716 * We send an SMB1 negprot with the SMB2 dialects
3717 * and expect a SMB1 or a SMB2 response.
3718 *
3719 * smbXcli_negprot_dispatch_incoming() will fix the
3720 * callback to match protocol of the response.
3721 */
3722 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
3723
3724 subreq = smbXcli_negprot_smb1_subreq(state);
3725 if (tevent_req_nomem(subreq, req)) {
3726 return tevent_req_post(req, ev);
3727 }
3728 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
3729 return req;
3730 }
3731
3732 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
3733 {
3734 struct tevent_req *req =
3735 tevent_req_callback_data(subreq,
3736 struct tevent_req);
3737 NTSTATUS status;
3738
3739 /*
3740 * we just want the low level error
3741 */
3742 status = tevent_req_simple_recv_ntstatus(subreq);
3743 TALLOC_FREE(subreq);
3744 if (tevent_req_nterror(req, status)) {
3745 return;
3746 }
3747
3748 /* this should never happen */
3749 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
3750 }
3751
3752 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
3753 {
3754 size_t i;
3755 DATA_BLOB bytes = data_blob_null;
3756 uint8_t flags;
3757 uint16_t flags2;
3758
3759 /* setup the protocol strings */
3760 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3761 uint8_t c = 2;
3762 bool ok;
3763
3764 if (smb1cli_prots[i].proto < state->min_protocol) {
3765 continue;
3766 }
3767
3768 if (smb1cli_prots[i].proto > state->max_protocol) {
3769 continue;
3770 }
3771
3772 ok = data_blob_append(state, &bytes, &c, sizeof(c));
3773 if (!ok) {
3774 return NULL;
3775 }
3776
3777 /*
3778 * We now it is already ascii and
3779 * we want NULL termination.
3780 */
3781 ok = data_blob_append(state, &bytes,
3782 smb1cli_prots[i].smb1_name,
3783 strlen(smb1cli_prots[i].smb1_name)+1);
3784 if (!ok) {
3785 return NULL;
3786 }
3787 }
3788
3789 smb1cli_req_flags(state->max_protocol,
3790 state->conn->smb1.client.capabilities,
3791 SMBnegprot,
3792 0, 0, &flags,
3793 0, 0, &flags2);
3794
3795 return smb1cli_req_send(state, state->ev, state->conn,
3796 SMBnegprot,
3797 flags, ~flags,
3798 flags2, ~flags2,
3799 state->timeout_msec,
3800 0xFFFE, 0, NULL, /* pid, tid, session */
3801 0, NULL, /* wct, vwv */
3802 bytes.length, bytes.data);
3803 }
3804
3805 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
3806 {
3807 struct tevent_req *req =
3808 tevent_req_callback_data(subreq,
3809 struct tevent_req);
3810 struct smbXcli_negprot_state *state =
3811 tevent_req_data(req,
3812 struct smbXcli_negprot_state);
3813 struct smbXcli_conn *conn = state->conn;
3814 struct iovec *recv_iov = NULL;
3815 uint8_t *inhdr;
3816 uint8_t wct;
3817 uint16_t *vwv;
3818 uint32_t num_bytes;
3819 uint8_t *bytes;
3820 NTSTATUS status;
3821 uint16_t protnum;
3822 size_t i;
3823 size_t num_prots = 0;
3824 uint8_t flags;
3825 uint32_t client_capabilities = conn->smb1.client.capabilities;
3826 uint32_t both_capabilities;
3827 uint32_t server_capabilities = 0;
3828 uint32_t capabilities;
3829 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
3830 uint32_t server_max_xmit = 0;
3831 uint32_t max_xmit;
3832 uint32_t server_max_mux = 0;
3833 uint16_t server_security_mode = 0;
3834 uint32_t server_session_key = 0;
3835 bool server_readbraw = false;
3836 bool server_writebraw = false;
3837 bool server_lockread = false;
3838 bool server_writeunlock = false;
3839 struct GUID server_guid = GUID_zero();
3840 DATA_BLOB server_gss_blob = data_blob_null;
3841 uint8_t server_challenge[8];
3842 char *server_workgroup = NULL;
3843 char *server_name = NULL;
3844 int server_time_zone = 0;
3845 NTTIME server_system_time = 0;
3846 static const struct smb1cli_req_expected_response expected[] = {
3847 {
3848 .status = NT_STATUS_OK,
3849 .wct = 0x11, /* NT1 */
3850 },
3851 {
3852 .status = NT_STATUS_OK,
3853 .wct = 0x0D, /* LM */
3854 },
3855 {
3856 .status = NT_STATUS_OK,
3857 .wct = 0x01, /* CORE */
3858 }
3859 };
3860
3861 ZERO_STRUCT(server_challenge);
3862
3863 status = smb1cli_req_recv(subreq, state,
3864 &recv_iov,
3865 &inhdr,
3866 &wct,
3867 &vwv,
3868 NULL, /* pvwv_offset */
3869 &num_bytes,
3870 &bytes,
3871 NULL, /* pbytes_offset */
3872 NULL, /* pinbuf */
3873 expected, ARRAY_SIZE(expected));
3874 TALLOC_FREE(subreq);
3875 if (tevent_req_nterror(req, status)) {
3876 return;
3877 }
3878
3879 flags = CVAL(inhdr, HDR_FLG);
3880
3881 protnum = SVAL(vwv, 0);
3882
3883 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3884 if (smb1cli_prots[i].proto < state->min_protocol) {
3885 continue;
3886 }
3887
3888 if (smb1cli_prots[i].proto > state->max_protocol) {
3889 continue;
3890 }
3891
3892 if (protnum != num_prots) {
3893 num_prots++;
3894 continue;
3895 }
3896
3897 conn->protocol = smb1cli_prots[i].proto;
3898 break;
3899 }
3900
3901 if (conn->protocol == PROTOCOL_NONE) {
3902 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3903 return;
3904 }
3905
3906 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
3907 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
3908 "and the selected protocol level doesn't support it.\n"));
3909 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3910 return;
3911 }
3912
3913 if (flags & FLAG_SUPPORT_LOCKREAD) {
3914 server_lockread = true;
3915 server_writeunlock = true;
3916 }
3917
3918 if (conn->protocol >= PROTOCOL_NT1) {
3919 const char *client_signing = NULL;
3920 bool server_mandatory = false;
3921 bool server_allowed = false;
3922 const char *server_signing = NULL;
3923 bool ok;
3924 uint8_t key_len;
3925
3926 if (wct != 0x11) {
3927 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3928 return;
3929 }
3930
3931 /* NT protocol */
3932 server_security_mode = CVAL(vwv + 1, 0);
3933 server_max_mux = SVAL(vwv + 1, 1);
3934 server_max_xmit = IVAL(vwv + 3, 1);
3935 server_session_key = IVAL(vwv + 7, 1);
3936 server_time_zone = SVALS(vwv + 15, 1);
3937 server_time_zone *= 60;
3938 /* this time arrives in real GMT */
3939 server_system_time = BVAL(vwv + 11, 1);
3940 server_capabilities = IVAL(vwv + 9, 1);
3941
3942 key_len = CVAL(vwv + 16, 1);
3943
3944 if (server_capabilities & CAP_RAW_MODE) {
3945 server_readbraw = true;
3946 server_writebraw = true;
3947 }
3948 if (server_capabilities & CAP_LOCK_AND_READ) {
3949 server_lockread = true;
3950 }
3951
3952 if (server_capabilities & CAP_EXTENDED_SECURITY) {
3953 DATA_BLOB blob1, blob2;
3954
3955 if (num_bytes < 16) {
3956 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3957 return;
3958 }
3959
3960 blob1 = data_blob_const(bytes, 16);
3961 status = GUID_from_data_blob(&blob1, &server_guid);
3962 if (tevent_req_nterror(req, status)) {
3963 return;
3964 }
3965
3966 blob1 = data_blob_const(bytes+16, num_bytes-16);
3967 blob2 = data_blob_dup_talloc(state, blob1);
3968 if (blob1.length > 0 &&
3969 tevent_req_nomem(blob2.data, req)) {
3970 return;
3971 }
3972 server_gss_blob = blob2;
3973 } else {
3974 DATA_BLOB blob1, blob2;
3975
3976 if (num_bytes < key_len) {
3977 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3978 return;
3979 }
3980
3981 if (key_len != 0 && key_len != 8) {
3982 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3983 return;
3984 }
3985
3986 if (key_len == 8) {
3987 memcpy(server_challenge, bytes, 8);
3988 }
3989
3990 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
3991 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
3992 if (blob1.length > 0) {
3993 size_t len;
3994
3995 len = utf16_len_n(blob1.data,
3996 blob1.length);
3997 blob1.length = len;
3998
3999 ok = convert_string_talloc(state,
4000 CH_UTF16LE,
4001 CH_UNIX,
4002 blob1.data,
4003 blob1.length,
4004 &server_workgroup,
4005 &len);
4006 if (!ok) {
4007 status = map_nt_error_from_unix_common(errno);
4008 tevent_req_nterror(req, status);
4009 return;
4010 }
4011 }
4012
4013 blob2.data += blob1.length;
4014 blob2.length -= blob1.length;
4015 if (blob2.length > 0) {
4016 size_t len;
4017
4018 len = utf16_len_n(blob1.data,
4019 blob1.length);
4020 blob1.length = len;
4021
4022 ok = convert_string_talloc(state,
4023 CH_UTF16LE,
4024 CH_UNIX,
4025 blob2.data,
4026 blob2.length,
4027 &server_name,
4028 &len);
4029 if (!ok) {
4030 status = map_nt_error_from_unix_common(errno);
4031 tevent_req_nterror(req, status);
4032 return;
4033 }
4034 }
4035 }
4036
4037 client_signing = "disabled";
4038 if (conn->allow_signing) {
4039 client_signing = "allowed";
4040 }
4041 if (conn->mandatory_signing) {
4042 client_signing = "required";
4043 }
4044
4045 server_signing = "not supported";
4046 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4047 server_signing = "supported";
4048 server_allowed = true;
4049 } else if (conn->mandatory_signing) {
4050 /*
4051 * We have mandatory signing as client
4052 * lets assume the server will look at our
4053 * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4054 * flag in the session setup
4055 */
4056 server_signing = "not announced";
4057 server_allowed = true;
4058 }
4059 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4060 server_signing = "required";
4061 server_mandatory = true;
4062 }
4063
4064 ok = smb_signing_set_negotiated(conn->smb1.signing,
4065 server_allowed,
4066 server_mandatory);
4067 if (!ok) {
4068 DEBUG(1,("cli_negprot: SMB signing is required, "
4069 "but client[%s] and server[%s] mismatch\n",
4070 client_signing, server_signing));
4071 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4072 return;
4073 }
4074
4075 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4076 DATA_BLOB blob1;
4077 uint8_t key_len;
4078 time_t t;
4079
4080 if (wct != 0x0D) {
4081 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4082 return;
4083 }
4084
4085 server_security_mode = SVAL(vwv + 1, 0);
4086 server_max_xmit = SVAL(vwv + 2, 0);
4087 server_max_mux = SVAL(vwv + 3, 0);
4088 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4089 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4090 server_session_key = IVAL(vwv + 6, 0);
4091 server_time_zone = SVALS(vwv + 10, 0);
4092 server_time_zone *= 60;
4093 /* this time is converted to GMT by make_unix_date */
4094 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4095 unix_to_nt_time(&server_system_time, t);
4096 key_len = SVAL(vwv + 11, 0);
4097
4098 if (num_bytes < key_len) {
4099 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4100 return;
4101 }
4102
4103 if (key_len != 0 && key_len != 8) {
4104 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4105 return;
4106 }
4107
4108 if (key_len == 8) {
4109 memcpy(server_challenge, bytes, 8);
4110 }
4111
4112 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4113 if (blob1.length > 0) {
4114 size_t len;
4115 bool ok;
4116
4117 len = utf16_len_n(blob1.data,
4118 blob1.length);
4119 blob1.length = len;
4120
4121 ok = convert_string_talloc(state,
4122 CH_DOS,
4123 CH_UNIX,
4124 blob1.data,
4125 blob1.length,
4126 &server_workgroup,
4127 &len);
4128 if (!ok) {
4129 status = map_nt_error_from_unix_common(errno);
4130 tevent_req_nterror(req, status);
4131 return;
4132 }
4133 }
4134
4135 } else {
4136 /* the old core protocol */
4137 server_time_zone = get_time_zone(time(NULL));
4138 server_max_xmit = 1024;
4139 server_max_mux = 1;
4140 }
4141
4142 if (server_max_xmit < 1024) {
4143 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4144 return;
4145 }
4146
4147 if (server_max_mux < 1) {
4148 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4149 return;
4150 }
4151
4152 /*
4153 * Now calculate the negotiated capabilities
4154 * based on the mask for:
4155 * - client only flags
4156 * - flags used in both directions
4157 * - server only flags
4158 */
4159 both_capabilities = client_capabilities & server_capabilities;
4160 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4161 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4162 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4163
4164 max_xmit = MIN(client_max_xmit, server_max_xmit);
4165
4166 conn->smb1.server.capabilities = server_capabilities;
4167 conn->smb1.capabilities = capabilities;
4168
4169 conn->smb1.server.max_xmit = server_max_xmit;
4170 conn->smb1.max_xmit = max_xmit;
4171
4172 conn->smb1.server.max_mux = server_max_mux;
4173
4174 conn->smb1.server.security_mode = server_security_mode;
4175
4176 conn->smb1.server.readbraw = server_readbraw;
4177 conn->smb1.server.writebraw = server_writebraw;
4178 conn->smb1.server.lockread = server_lockread;
4179 conn->smb1.server.writeunlock = server_writeunlock;
4180
4181 conn->smb1.server.session_key = server_session_key;
4182
4183 talloc_steal(conn, server_gss_blob.data);
4184 conn->smb1.server.gss_blob = server_gss_blob;
4185 conn->smb1.server.guid = server_guid;
4186 memcpy(conn->smb1.server.challenge, server_challenge, 8);
4187 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4188 conn->smb1.server.name = talloc_move(conn, &server_name);
4189
4190 conn->smb1.server.time_zone = server_time_zone;
4191 conn->smb1.server.system_time = server_system_time;
4192
4193 tevent_req_done(req);
4194 }
4195
4196 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4197 {
4198 size_t i;
4199 uint8_t *buf;
4200 uint16_t dialect_count = 0;
4201
4202 buf = state->smb2.dyn;
4203 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4204 if (smb2cli_prots[i].proto < state->min_protocol) {
4205 continue;
4206 }
4207
4208 if (smb2cli_prots[i].proto > state->max_protocol) {
4209 continue;
4210 }
4211
4212 SSVAL(buf, dialect_count*2, smb2cli_prots[i].smb2_dialect);
4213 dialect_count++;
4214 }
4215
4216 buf = state->smb2.fixed;
4217 SSVAL(buf, 0, 36);
4218 SSVAL(buf, 2, dialect_count);
4219 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4220 SSVAL(buf, 6, 0); /* Reserved */
4221 if (state->max_protocol >= PROTOCOL_SMB2_22) {
4222 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4223 } else {
4224 SIVAL(buf, 8, 0); /* Capabilities */
4225 }
4226 if (state->max_protocol >= PROTOCOL_SMB2_10) {
4227 NTSTATUS status;
4228 DATA_BLOB blob;
4229
4230 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4231 state, &blob);
4232 if (!NT_STATUS_IS_OK(status)) {
4233 return NULL;
4234 }
4235 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4236 } else {
4237 memset(buf+12, 0, 16); /* ClientGuid */
4238 }
4239 SBVAL(buf, 28, 0); /* ClientStartTime */
4240
4241 return smb2cli_req_send(state, state->ev,
4242 state->conn, SMB2_OP_NEGPROT,
4243 0, 0, /* flags */
4244 state->timeout_msec,
4245 NULL, NULL, /* tcon, session */
4246 state->smb2.fixed, sizeof(state->smb2.fixed),
4247 state->smb2.dyn, dialect_count*2);
4248 }
4249
4250 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4251 {
4252 struct tevent_req *req =
4253 tevent_req_callback_data(subreq,
4254 struct tevent_req);
4255 struct smbXcli_negprot_state *state =
4256 tevent_req_data(req,
4257 struct smbXcli_negprot_state);
4258 struct smbXcli_conn *conn = state->conn;
4259 size_t security_offset, security_length;
4260 DATA_BLOB blob;
4261 NTSTATUS status;
4262 struct iovec *iov;
4263 uint8_t *body;
4264 size_t i;
4265 uint16_t dialect_revision;
4266 static const struct smb2cli_req_expected_response expected[] = {
4267 {
4268 .status = NT_STATUS_OK,
4269 .body_size = 0x41
4270 }
4271 };
4272
4273 status = smb2cli_req_recv(subreq, state, &iov,
4274 expected, ARRAY_SIZE(expected));
4275 TALLOC_FREE(subreq);
4276 if (tevent_req_nterror(req, status)) {
4277 return;
4278 }
4279
4280 body = (uint8_t *)iov[1].iov_base;
4281
4282 dialect_revision = SVAL(body, 4);
4283
4284 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4285 if (smb2cli_prots[i].proto < state->min_protocol) {
4286 continue;
4287 }
4288
4289 if (smb2cli_prots[i].proto > state->max_protocol) {
4290 continue;
4291 }
4292
4293 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4294 continue;
4295 }
4296
4297 conn->protocol = smb2cli_prots[i].proto;
4298 break;
4299 }
4300
4301 if (conn->protocol == PROTOCOL_NONE) {
4302 if (state->min_protocol >= PROTOCOL_SMB2_02) {
4303 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4304 return;
4305 }
4306
4307 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4308 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4309 return;
4310 }
4311
4312 /* make sure we do not loop forever */
4313 state->min_protocol = PROTOCOL_SMB2_02;
4314
4315 /*
4316 * send a SMB2 negprot, in order to negotiate
4317 * the SMB2 dialect.
4318 */
4319 subreq = smbXcli_negprot_smb2_subreq(state);
4320 if (tevent_req_nomem(subreq, req)) {
4321 return;
4322 }
4323 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4324 return;
4325 }
4326
4327 conn->smb2.server.security_mode = SVAL(body, 2);
4328
4329 blob = data_blob_const(body + 8, 16);
4330 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4331 if (tevent_req_nterror(req, status)) {
4332 return;
4333 }
4334
4335 conn->smb2.server.capabilities = IVAL(body, 24);
4336 conn->smb2.server.max_trans_size= IVAL(body, 28);
4337 conn->smb2.server.max_read_size = IVAL(body, 32);
4338 conn->smb2.server.max_write_size= IVAL(body, 36);
4339 conn->smb2.server.system_time = BVAL(body, 40);
4340 conn->smb2.server.start_time = BVAL(body, 48);
4341
4342 security_offset = SVAL(body, 56);
4343 security_length = SVAL(body, 58);
4344
4345 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4346 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4347 return;
4348 }
4349
4350 if (security_length > iov[2].iov_len) {
4351 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4352 return;
4353 }
4354
4355 conn->smb2.server.gss_blob = data_blob_talloc(conn,
4356 iov[2].iov_base,
4357 security_length);
4358 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4359 return;
4360 }
4361
4362 tevent_req_done(req);
4363 }
4364
4365 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4366 TALLOC_CTX *tmp_mem,
4367 uint8_t *inbuf)
4368 {
4369 size_t num_pending = talloc_array_length(conn->pending);
4370 struct tevent_req *subreq;
4371 struct smbXcli_req_state *substate;
4372 struct tevent_req *req;
4373 uint32_t protocol_magic;
4374 size_t inbuf_len = smb_len_nbt(inbuf);
4375
4376 if (num_pending != 1) {
4377 return NT_STATUS_INTERNAL_ERROR;
4378 }
4379
4380 if (inbuf_len < 4) {
4381 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4382 }
4383
4384 subreq = conn->pending[0];
4385 substate = tevent_req_data(subreq, struct smbXcli_req_state);
4386 req = tevent_req_callback_data(subreq, struct tevent_req);
4387
4388 protocol_magic = IVAL(inbuf, 4);
4389
4390 switch (protocol_magic) {
4391 case SMB_MAGIC:
4392 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4393 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4394 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4395
4396 case SMB2_MAGIC:
4397 if (substate->smb2.recv_iov == NULL) {
4398 /*
4399 * For the SMB1 negprot we have move it.
4400 */
4401 substate->smb2.recv_iov = substate->smb1.recv_iov;
4402 substate->smb1.recv_iov = NULL;
4403 }
4404
4405 /*
4406 * we got an SMB2 answer, which consumed sequence number 0
4407 * so we need to use 1 as the next one
4408 */
4409 conn->smb2.mid = 1;
4410 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4411 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4412 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4413 }
4414
4415 DEBUG(10, ("Got non-SMB PDU\n"));
4416 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4417 }
4418
4419 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
4420 {
4421 return tevent_req_simple_recv_ntstatus(req);
4422 }
4423
4424 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
4425 uint32_t timeout_msec,
4426 enum protocol_types min_protocol,
4427 enum protocol_types max_protocol)
4428 {
4429 TALLOC_CTX *frame = talloc_stackframe();
4430 struct tevent_context *ev;
4431 struct tevent_req *req;
4432 NTSTATUS status = NT_STATUS_NO_MEMORY;
4433 bool ok;
4434
4435 if (smbXcli_conn_has_async_calls(conn)) {
4436 /*
4437 * Can't use sync call while an async call is in flight
4438 */
4439 status = NT_STATUS_INVALID_PARAMETER_MIX;
4440 goto fail;
4441 }
4442 ev = tevent_context_init(frame);
4443 if (ev == NULL) {
4444 goto fail;
4445 }
4446 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
4447 min_protocol, max_protocol);
4448 if (req == NULL) {
4449 goto fail;
4450 }
4451 ok = tevent_req_poll(req, ev);
4452 if (!ok) {
4453 status = map_nt_error_from_unix_common(errno);
4454 goto fail;
4455 }
4456 status = smbXcli_negprot_recv(req);
4457 fail:
4458 TALLOC_FREE(frame);
4459 return status;
4460 }
4461
4462 static int smbXcli_session_destructor(struct smbXcli_session *session)
4463 {
4464 if (session->conn == NULL) {
4465 return 0;
4466 }
4467
4468 DLIST_REMOVE(session->conn->sessions, session);
4469 return 0;
4470 }
4471
4472 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
4473 struct smbXcli_conn *conn)
4474 {
4475 struct smbXcli_session *session;
4476
4477 session = talloc_zero(mem_ctx, struct smbXcli_session);
4478 if (session == NULL) {
4479 return NULL;
4480 }
4481 session->smb2 = talloc_zero(session, struct smb2cli_session);
4482 if (session->smb2 == NULL) {
4483 talloc_free(session);
4484 return NULL;
4485 }
4486 talloc_set_destructor(session, smbXcli_session_destructor);
4487
4488 DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
4489 session->conn = conn;
4490
4491 return session;
4492 }
4493
4494 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
4495 TALLOC_CTX *mem_ctx,
4496 DATA_BLOB *key)
4497 {
4498 const DATA_BLOB *application_key;
4499
4500 *key = data_blob_null;
4501
4502 if (session->conn == NULL) {
4503 return NT_STATUS_NO_USER_SESSION_KEY;
4504 }
4505
4506 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
4507 application_key = &session->smb2->application_key;
4508 } else {
4509 application_key = &session->smb1.application_key;
4510 }
4511
4512 if (application_key->length == 0) {
4513 return NT_STATUS_NO_USER_SESSION_KEY;
4514 }
4515
4516 *key = data_blob_dup_talloc(mem_ctx, *application_key);
4517 if (key->data == NULL) {
4518 return NT_STATUS_NO_MEMORY;
4519 }
4520
4521 return NT_STATUS_OK;
4522 }
4523
4524 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
4525 {
4526 session->disconnect_expired = true;
4527 }
4528
4529 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
4530 {
4531 return session->smb1.session_id;
4532 }
4533
4534 void smb1cli_session_set_id(struct smbXcli_session *session,
4535 uint16_t session_id)
4536 {
4537 session->smb1.session_id = session_id;
4538 }
4539
4540 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
4541 const DATA_BLOB _session_key)
4542 {
4543 struct smbXcli_conn *conn = session->conn;
4544 uint8_t session_key[16];
4545
4546 if (conn == NULL) {
4547 return NT_STATUS_INVALID_PARAMETER_MIX;
4548 }
4549
4550 if (session->smb1.application_key.length != 0) {
4551 /*
4552 * TODO: do not allow this...
4553 *
4554 * return NT_STATUS_INVALID_PARAMETER_MIX;
4555 */
4556 data_blob_clear_free(&session->smb1.application_key);
4557 session->smb1.protected_key = false;
4558 }
4559
4560 if (_session_key.length == 0) {
4561 return NT_STATUS_OK;
4562 }
4563
4564 ZERO_STRUCT(session_key);
4565 memcpy(session_key, _session_key.data,
4566 MIN(_session_key.length, sizeof(session_key)));
4567
4568 session->smb1.application_key = data_blob_talloc(session,
4569 session_key,
4570 sizeof(session_key));
4571 ZERO_STRUCT(session_key);
4572 if (session->smb1.application_key.data == NULL) {
4573 return NT_STATUS_NO_MEMORY;
4574 }
4575
4576 session->smb1.protected_key = false;
4577
4578 return NT_STATUS_OK;
4579 }
4580
4581 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
4582 {
4583 if (session->smb1.protected_key) {
4584 /* already protected */
4585 return NT_STATUS_OK;
4586 }
4587
4588 if (session->smb1.application_key.length != 16) {
4589 return NT_STATUS_INVALID_PARAMETER_MIX;
4590 }
4591
4592 smb_key_derivation(session->smb1.application_key.data,
4593 session->smb1.application_key.length,
4594 session->smb1.application_key.data);
4595
4596 session->smb1.protected_key = true;
4597
4598 return NT_STATUS_OK;
4599 }
4600
4601 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
4602 {
4603 struct smbXcli_conn *conn = session->conn;
4604 uint8_t security_mode = 0;
4605
4606 if (conn == NULL) {
4607 return security_mode;
4608 }
4609
4610 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
4611 if (conn->mandatory_signing) {
4612 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
4613 }
4614
4615 return security_mode;
4616 }
4617
4618 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
4619 {
4620 return session->smb2->session_id;
4621 }
4622
4623 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
4624 {
4625 return session->smb2->session_flags;
4626 }
4627
4628 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
4629 uint64_t session_id,
4630 uint16_t session_flags)
4631 {
4632 session->smb2->session_id = session_id;
4633 session->smb2->session_flags = session_flags;
4634 }
4635
4636 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
4637 {
4638 session->smb2->channel_sequence += 1;
4639 }
4640
4641 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
4642 const DATA_BLOB _session_key,
4643 const struct iovec *recv_iov)
4644 {
4645 struct smbXcli_conn *conn = session->conn;
4646 uint16_t no_sign_flags;
4647 uint8_t session_key[16];
4648 NTSTATUS status;
4649
4650 if (conn == NULL) {
4651 return NT_STATUS_INVALID_PARAMETER_MIX;
4652 }
4653
4654 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
4655
4656 if (session->smb2->session_flags & no_sign_flags) {
4657 session->smb2->should_sign = false;
4658 return NT_STATUS_OK;
4659 }
4660
4661 if (session->smb2->signing_key.length != 0) {
4662 return NT_STATUS_INVALID_PARAMETER_MIX;
4663 }
4664
4665 ZERO_STRUCT(session_key);
4666 memcpy(session_key, _session_key.data,
4667 MIN(_session_key.length, sizeof(session_key)));
4668
4669 session->smb2->signing_key = data_blob_talloc(session,
4670 session_key,
4671 sizeof(session_key));
4672 if (session->smb2->signing_key.data == NULL) {
4673 ZERO_STRUCT(session_key);
4674 return NT_STATUS_NO_MEMORY;
4675 }
4676
4677 if (conn->protocol >= PROTOCOL_SMB2_24) {
4678 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4679 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4680
4681 smb2_key_derivation(session_key, sizeof(session_key),
4682 label.data, label.length,
4683 context.data, context.length,
4684 session->smb2->signing_key.data);
4685 }
4686
4687 session->smb2->encryption_key = data_blob_dup_talloc(session,
4688 session->smb2->signing_key);
4689 if (session->smb2->encryption_key.data == NULL) {
4690 ZERO_STRUCT(session_key);
4691 return NT_STATUS_NO_MEMORY;
4692 }
4693
4694 if (conn->protocol >= PROTOCOL_SMB2_24) {
4695 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4696 const DATA_BLOB context = data_blob_string_const_null("ServerIn ");
4697
4698 smb2_key_derivation(session_key, sizeof(session_key),
4699 label.data, label.length,
4700 context.data, context.length,
4701 session->smb2->encryption_key.data);
4702 }
4703
4704 session->smb2->decryption_key = data_blob_dup_talloc(session,
4705 session->smb2->signing_key);
4706 if (session->smb2->decryption_key.data == NULL) {
4707 ZERO_STRUCT(session_key);
4708 return NT_STATUS_NO_MEMORY;
4709 }
4710
4711 if (conn->protocol >= PROTOCOL_SMB2_24) {
4712 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4713 const DATA_BLOB context = data_blob_string_const_null("ServerOut");
4714
4715 smb2_key_derivation(session_key, sizeof(session_key),
4716 label.data, label.length,
4717 context.data, context.length,
4718 session->smb2->decryption_key.data);
4719 }
4720
4721 session->smb2->application_key = data_blob_dup_talloc(session,
4722 session->smb2->signing_key);
4723 if (session->smb2->application_key.data == NULL) {
4724 ZERO_STRUCT(session_key);
4725 return NT_STATUS_NO_MEMORY;
4726 }
4727
4728 if (conn->protocol >= PROTOCOL_SMB2_24) {
4729 const DATA_BLOB label = data_blob_string_const_null("SMB2APP");
4730 const DATA_BLOB context = data_blob_string_const_null("SmbRpc");
4731
4732 smb2_key_derivation(session_key, sizeof(session_key),
4733 label.data, label.length,
4734 context.data, context.length,
4735 session->smb2->application_key.data);
4736 }
4737 ZERO_STRUCT(session_key);
4738
4739 session->smb2_channel.signing_key = data_blob_dup_talloc(session,
4740 session->smb2->signing_key);
4741 if (session->smb2_channel.signing_key.data == NULL) {
4742 return NT_STATUS_NO_MEMORY;
4743 }
4744
4745 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4746 session->conn->protocol,
4747 recv_iov, 3);
4748 if (!NT_STATUS_IS_OK(status)) {
4749 return status;
4750 }
4751
4752 session->smb2->should_sign = false;
4753 session->smb2->should_encrypt = false;
4754
4755 if (conn->desire_signing) {
4756 session->smb2->should_sign = true;
4757 }
4758
4759 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
4760 session->smb2->should_sign = true;
4761 }
4762
4763 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
4764 session->smb2->should_encrypt = true;
4765 }
4766
4767 if (conn->protocol < PROTOCOL_SMB2_24) {
4768 session->smb2->should_encrypt = false;
4769 }
4770
4771 if (!(conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
4772 session->smb2->should_encrypt = false;
4773 }
4774
4775 generate_random_buffer((uint8_t *)&session->smb2->nonce_high,
4776 sizeof(session->smb2->nonce_high));
4777 session->smb2->nonce_low = 1;
4778
4779 return NT_STATUS_OK;
4780 }
4781
4782 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
4783 struct smbXcli_session *session1,
4784 struct smbXcli_conn *conn,
4785 struct smbXcli_session **_session2)
4786 {
4787 struct smbXcli_session *session2;
4788
4789 if (session1->smb2->signing_key.length == 0) {
4790 return NT_STATUS_INVALID_PARAMETER_MIX;
4791 }
4792
4793 if (conn == NULL) {
4794 return NT_STATUS_INVALID_PARAMETER_MIX;
4795 }
4796
4797 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
4798 if (session2 == NULL) {
4799 return NT_STATUS_NO_MEMORY;
4800 }
4801 session2->smb2 = talloc_reference(session2, session1->smb2);
4802 if (session2->smb2 == NULL) {
4803 talloc_free(session2);
4804 return NT_STATUS_NO_MEMORY;
4805 }
4806
4807 talloc_set_destructor(session2, smbXcli_session_destructor);
4808 DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
4809 session2->conn = conn;
4810
4811 *_session2 = session2;
4812 return NT_STATUS_OK;
4813 }
4814
4815 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
4816 const DATA_BLOB _channel_key,
4817 const struct iovec *recv_iov)
4818 {
4819 struct smbXcli_conn *conn = session->conn;
4820 uint8_t channel_key[16];
4821 NTSTATUS status;
4822
4823 if (conn == NULL) {
4824 return NT_STATUS_INVALID_PARAMETER_MIX;
4825 }
4826
4827 if (session->smb2_channel.signing_key.length != 0) {
4828 return NT_STATUS_INVALID_PARAMETER_MIX;
4829 }
4830
4831 ZERO_STRUCT(channel_key);
4832 memcpy(channel_key, _channel_key.data,
4833 MIN(_channel_key.length, sizeof(channel_key)));
4834
4835 session->smb2_channel.signing_key = data_blob_talloc(session,
4836 channel_key,
4837 sizeof(channel_key));
4838 if (session->smb2_channel.signing_key.data == NULL) {
4839 ZERO_STRUCT(channel_key);
4840 return NT_STATUS_NO_MEMORY;
4841 }
4842
4843 if (conn->protocol >= PROTOCOL_SMB2_24) {
4844 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4845 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4846
4847 smb2_key_derivation(channel_key, sizeof(channel_key),
4848 label.data, label.length,
4849 context.data, context.length,
4850 session->smb2_channel.signing_key.data);
4851 }
4852 ZERO_STRUCT(channel_key);
4853
4854 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4855 session->conn->protocol,
4856 recv_iov, 3);
4857 if (!NT_STATUS_IS_OK(status)) {
4858 return status;
4859 }
4860
4861 return NT_STATUS_OK;
4862 }
4863
4864 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
4865 {
4866 struct smbXcli_tcon *tcon;
4867
4868 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
4869 if (tcon == NULL) {
4870 return NULL;
4871 }
4872
4873 return tcon;
4874 }
4875
4876 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
4877 {
4878 return tcon->smb1.tcon_id;
4879 }
4880
4881 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
4882 {
4883 tcon->smb1.tcon_id = tcon_id;
4884 }
4885
4886 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
4887 uint16_t tcon_id,
4888 uint16_t optional_support,
4889 uint32_t maximal_access,
4890 uint32_t guest_maximal_access,
4891 const char *service,
4892 const char *fs_type)
4893 {
4894 tcon->smb1.tcon_id = tcon_id;
4895 tcon->smb1.optional_support = optional_support;
4896 tcon->smb1.maximal_access = maximal_access;
4897 tcon->smb1.guest_maximal_access = guest_maximal_access;
4898
4899 TALLOC_FREE(tcon->smb1.service);
4900 tcon->smb1.service = talloc_strdup(tcon, service);
4901 if (service != NULL && tcon->smb1.service == NULL) {
4902 return false;
4903 }
4904
4905 TALLOC_FREE(tcon->smb1.fs_type);
4906 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
4907 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
4908 return false;
4909 }
4910
4911 return true;
4912 }
4913
4914 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
4915 {
4916 return tcon->smb2.tcon_id;
4917 }
4918
4919 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
4920 {
4921 return tcon->smb2.capabilities;
4922 }
4923
4924 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
4925 struct smbXcli_session *session,
4926 uint32_t tcon_id,
4927 uint8_t type,
4928 uint32_t flags,
4929 uint32_t capabilities,
4930 uint32_t maximal_access)
4931 {
4932 tcon->smb2.tcon_id = tcon_id;
4933 tcon->smb2.type = type;
4934 tcon->smb2.flags = flags;
4935 tcon->smb2.capabilities = capabilities;
4936 tcon->smb2.maximal_access = maximal_access;
4937
4938 tcon->smb2.should_encrypt = false;
4939
4940 if (session == NULL) {
4941 return;
4942 }
4943
4944 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
4945
4946 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
4947 tcon->smb2.should_encrypt = true;
4948 }
4949 }
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