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tests/auth_log: Permit SMB2 service description if empty binding is used for kerberos...
[Samba.git] / libcli / smb / smbXcli_base.c
blobad1b67b8476e62ff758ae4d481872876243193e3
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 "lib/util/iov_buf.h"
29 #include "../libcli/smb/smb_common.h"
30 #include "../libcli/smb/smb_seal.h"
31 #include "../libcli/smb/smb_signing.h"
32 #include "../libcli/smb/read_smb.h"
33 #include "smbXcli_base.h"
34 #include "librpc/ndr/libndr.h"
35 #include "libcli/smb/smb2_negotiate_context.h"
36 #include "lib/crypto/sha512.h"
37 #include "lib/crypto/aes.h"
38 #include "lib/crypto/aes_ccm_128.h"
39 #include "lib/crypto/aes_gcm_128.h"
40
41 struct smbXcli_conn;
42 struct smbXcli_req;
43 struct smbXcli_session;
44 struct smbXcli_tcon;
45
46 struct smbXcli_conn {
47 int sock_fd;
48 struct sockaddr_storage local_ss;
49 struct sockaddr_storage remote_ss;
50 const char *remote_name;
51
52 struct tevent_queue *outgoing;
53 struct tevent_req **pending;
54 struct tevent_req *read_smb_req;
55 struct tevent_req *suicide_req;
56
57 enum protocol_types min_protocol;
58 enum protocol_types max_protocol;
59 enum protocol_types protocol;
60 bool allow_signing;
61 bool desire_signing;
62 bool mandatory_signing;
63
64 /*
65 * The incoming dispatch function should return:
66 * - NT_STATUS_RETRY, if more incoming PDUs are expected.
67 * - NT_STATUS_OK, if no more processing is desired, e.g.
68 * the dispatch function called
69 * tevent_req_done().
70 * - All other return values disconnect the connection.
71 */
72 NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
73 TALLOC_CTX *tmp_mem,
74 uint8_t *inbuf);
75
76 struct {
77 struct {
78 uint32_t capabilities;
79 uint32_t max_xmit;
80 } client;
81
82 struct {
83 uint32_t capabilities;
84 uint32_t max_xmit;
85 uint16_t max_mux;
86 uint16_t security_mode;
87 bool readbraw;
88 bool writebraw;
89 bool lockread;
90 bool writeunlock;
91 uint32_t session_key;
92 struct GUID guid;
93 DATA_BLOB gss_blob;
94 uint8_t challenge[8];
95 const char *workgroup;
96 const char *name;
97 int time_zone;
98 NTTIME system_time;
99 } server;
100
101 uint32_t capabilities;
102 uint32_t max_xmit;
103
104 uint16_t mid;
105
106 struct smb_signing_state *signing;
107 struct smb_trans_enc_state *trans_enc;
108
109 struct tevent_req *read_braw_req;
110 } smb1;
111
112 struct {
113 struct {
114 uint32_t capabilities;
115 uint16_t security_mode;
116 struct GUID guid;
117 } client;
118
119 struct {
120 uint32_t capabilities;
121 uint16_t security_mode;
122 struct GUID guid;
123 uint32_t max_trans_size;
124 uint32_t max_read_size;
125 uint32_t max_write_size;
126 NTTIME system_time;
127 NTTIME start_time;
128 DATA_BLOB gss_blob;
129 uint16_t cipher;
130 } server;
131
132 uint64_t mid;
133 uint16_t cur_credits;
134 uint16_t max_credits;
135
136 uint32_t cc_chunk_len;
137 uint32_t cc_max_chunks;
138
139 uint8_t io_priority;
140
141 bool force_channel_sequence;
142
143 uint8_t preauth_sha512[64];
144 } smb2;
145
146 struct smbXcli_session *sessions;
147 };
148
149 struct smb2cli_session {
150 uint64_t session_id;
151 uint16_t session_flags;
152 DATA_BLOB application_key;
153 DATA_BLOB signing_key;
154 bool should_sign;
155 bool should_encrypt;
156 DATA_BLOB encryption_key;
157 DATA_BLOB decryption_key;
158 uint64_t nonce_high_random;
159 uint64_t nonce_high_max;
160 uint64_t nonce_high;
161 uint64_t nonce_low;
162 uint16_t channel_sequence;
163 bool replay_active;
164 };
165
166 struct smbXcli_session {
167 struct smbXcli_session *prev, *next;
168 struct smbXcli_conn *conn;
169
170 struct {
171 uint16_t session_id;
172 uint16_t action;
173 DATA_BLOB application_key;
174 bool protected_key;
175 } smb1;
176
177 struct smb2cli_session *smb2;
178
179 struct {
180 DATA_BLOB signing_key;
181 uint8_t preauth_sha512[64];
182 } smb2_channel;
183
184 /*
185 * this should be a short term hack
186 * until the upper layers have implemented
187 * re-authentication.
188 */
189 bool disconnect_expired;
190 };
191
192 struct smbXcli_tcon {
193 bool is_smb1;
194 uint32_t fs_attributes;
195
196 struct {
197 uint16_t tcon_id;
198 uint16_t optional_support;
199 uint32_t maximal_access;
200 uint32_t guest_maximal_access;
201 char *service;
202 char *fs_type;
203 } smb1;
204
205 struct {
206 uint32_t tcon_id;
207 uint8_t type;
208 uint32_t flags;
209 uint32_t capabilities;
210 uint32_t maximal_access;
211 bool should_sign;
212 bool should_encrypt;
213 } smb2;
214 };
215
216 struct smbXcli_req_state {
217 struct tevent_context *ev;
218 struct smbXcli_conn *conn;
219 struct smbXcli_session *session; /* maybe NULL */
220 struct smbXcli_tcon *tcon; /* maybe NULL */
221
222 uint8_t length_hdr[4];
223
224 bool one_way;
225
226 uint8_t *inbuf;
227
228 struct tevent_req *write_req;
229
230 struct {
231 /* Space for the header including the wct */
232 uint8_t hdr[HDR_VWV];
233
234 /*
235 * For normal requests, smb1cli_req_send chooses a mid.
236 * SecondaryV trans requests need to use the mid of the primary
237 * request, so we need a place to store it.
238 * Assume it is set if != 0.
239 */
240 uint16_t mid;
241
242 uint16_t *vwv;
243 uint8_t bytecount_buf[2];
244
245 #define MAX_SMB_IOV 10
246 /* length_hdr, hdr, words, byte_count, buffers */
247 struct iovec iov[1 + 3 + MAX_SMB_IOV];
248 int iov_count;
249
250 bool one_way_seqnum;
251 uint32_t seqnum;
252 struct tevent_req **chained_requests;
253
254 uint8_t recv_cmd;
255 NTSTATUS recv_status;
256 /* always an array of 3 talloc elements */
257 struct iovec *recv_iov;
258 } smb1;
259
260 struct {
261 const uint8_t *fixed;
262 uint16_t fixed_len;
263 const uint8_t *dyn;
264 uint32_t dyn_len;
265
266 uint8_t transform[SMB2_TF_HDR_SIZE];
267 uint8_t hdr[SMB2_HDR_BODY];
268 uint8_t pad[7]; /* padding space for compounding */
269
270 /*
271 * always an array of 3 talloc elements
272 * (without a SMB2_TRANSFORM header!)
273 *
274 * HDR, BODY, DYN
275 */
276 struct iovec *recv_iov;
277
278 /*
279 * the expected max for the response dyn_len
280 */
281 uint32_t max_dyn_len;
282
283 uint16_t credit_charge;
284
285 bool should_sign;
286 bool should_encrypt;
287 uint64_t encryption_session_id;
288
289 bool signing_skipped;
290 bool notify_async;
291 bool got_async;
292 uint16_t cancel_flags;
293 uint64_t cancel_mid;
294 uint64_t cancel_aid;
295 } smb2;
296 };
297
298 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
299 {
300 /*
301 * NT_STATUS_OK, means we do not notify the callers
302 */
303 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
304
305 while (conn->sessions) {
306 conn->sessions->conn = NULL;
307 DLIST_REMOVE(conn->sessions, conn->sessions);
308 }
309
310 if (conn->smb1.trans_enc) {
311 TALLOC_FREE(conn->smb1.trans_enc);
312 }
313
314 return 0;
315 }
316
317 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
318 int fd,
319 const char *remote_name,
320 enum smb_signing_setting signing_state,
321 uint32_t smb1_capabilities,
322 struct GUID *client_guid,
323 uint32_t smb2_capabilities)
324 {
325 struct smbXcli_conn *conn = NULL;
326 void *ss = NULL;
327 struct sockaddr *sa = NULL;
328 socklen_t sa_length;
329 int ret;
330
331 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
332 if (!conn) {
333 return NULL;
334 }
335
336 conn->sock_fd = fd;
337
338 conn->remote_name = talloc_strdup(conn, remote_name);
339 if (conn->remote_name == NULL) {
340 goto error;
341 }
342
343 ss = (void *)&conn->local_ss;
344 sa = (struct sockaddr *)ss;
345 sa_length = sizeof(conn->local_ss);
346 ret = getsockname(fd, sa, &sa_length);
347 if (ret == -1) {
348 goto error;
349 }
350 ss = (void *)&conn->remote_ss;
351 sa = (struct sockaddr *)ss;
352 sa_length = sizeof(conn->remote_ss);
353 ret = getpeername(fd, sa, &sa_length);
354 if (ret == -1) {
355 goto error;
356 }
357
358 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
359 if (conn->outgoing == NULL) {
360 goto error;
361 }
362 conn->pending = NULL;
363
364 conn->min_protocol = PROTOCOL_NONE;
365 conn->max_protocol = PROTOCOL_NONE;
366 conn->protocol = PROTOCOL_NONE;
367
368 switch (signing_state) {
369 case SMB_SIGNING_OFF:
370 /* never */
371 conn->allow_signing = false;
372 conn->desire_signing = false;
373 conn->mandatory_signing = false;
374 break;
375 case SMB_SIGNING_DEFAULT:
376 case SMB_SIGNING_IF_REQUIRED:
377 /* if the server requires it */
378 conn->allow_signing = true;
379 conn->desire_signing = false;
380 conn->mandatory_signing = false;
381 break;
382 case SMB_SIGNING_DESIRED:
383 /* if the server desires it */
384 conn->allow_signing = true;
385 conn->desire_signing = true;
386 conn->mandatory_signing = false;
387 break;
388 case SMB_SIGNING_IPC_DEFAULT:
389 case SMB_SIGNING_REQUIRED:
390 /* always */
391 conn->allow_signing = true;
392 conn->desire_signing = true;
393 conn->mandatory_signing = true;
394 break;
395 }
396
397 conn->smb1.client.capabilities = smb1_capabilities;
398 conn->smb1.client.max_xmit = UINT16_MAX;
399
400 conn->smb1.capabilities = conn->smb1.client.capabilities;
401 conn->smb1.max_xmit = 1024;
402
403 conn->smb1.mid = 1;
404
405 /* initialise signing */
406 conn->smb1.signing = smb_signing_init(conn,
407 conn->allow_signing,
408 conn->desire_signing,
409 conn->mandatory_signing);
410 if (!conn->smb1.signing) {
411 goto error;
412 }
413
414 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
415 if (conn->mandatory_signing) {
416 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
417 }
418 if (client_guid) {
419 conn->smb2.client.guid = *client_guid;
420 }
421 conn->smb2.client.capabilities = smb2_capabilities;
422
423 conn->smb2.cur_credits = 1;
424 conn->smb2.max_credits = 0;
425 conn->smb2.io_priority = 1;
426
427 /*
428 * Samba and Windows servers accept a maximum of 16 MiB with a maximum
429 * chunk length of 1 MiB.
430 */
431 conn->smb2.cc_chunk_len = 1024 * 1024;
432 conn->smb2.cc_max_chunks = 16;
433
434 talloc_set_destructor(conn, smbXcli_conn_destructor);
435 return conn;
436
437 error:
438 TALLOC_FREE(conn);
439 return NULL;
440 }
441
442 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
443 {
444 if (conn == NULL) {
445 return false;
446 }
447
448 if (conn->sock_fd == -1) {
449 return false;
450 }
451
452 return true;
453 }
454
455 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
456 {
457 return conn->protocol;
458 }
459
460 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
461 {
462 if (conn->protocol >= PROTOCOL_SMB2_02) {
463 return true;
464 }
465
466 if (conn->smb1.capabilities & CAP_UNICODE) {
467 return true;
468 }
469
470 return false;
471 }
472
473 bool smbXcli_conn_signing_mandatory(struct smbXcli_conn *conn)
474 {
475 return conn->mandatory_signing;
476 }
477
478 /*
479 * [MS-SMB] 2.2.2.3.5 - SMB1 support for passing through
480 * query/set commands to the file system
481 */
482 bool smbXcli_conn_support_passthrough(struct smbXcli_conn *conn)
483 {
484 if (conn->protocol >= PROTOCOL_SMB2_02) {
485 return true;
486 }
487
488 if (conn->smb1.capabilities & CAP_W2K_SMBS) {
489 return true;
490 }
491
492 return false;
493 }
494
495 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
496 {
497 set_socket_options(conn->sock_fd, options);
498 }
499
500 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
501 {
502 return &conn->local_ss;
503 }
504
505 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
506 {
507 return &conn->remote_ss;
508 }
509
510 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
511 {
512 return conn->remote_name;
513 }
514
515 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
516 {
517 if (conn->protocol >= PROTOCOL_SMB2_02) {
518 /*
519 * TODO...
520 */
521 return 1;
522 }
523
524 return conn->smb1.server.max_mux;
525 }
526
527 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
528 {
529 if (conn->protocol >= PROTOCOL_SMB2_02) {
530 return conn->smb2.server.system_time;
531 }
532
533 return conn->smb1.server.system_time;
534 }
535
536 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
537 {
538 if (conn->protocol >= PROTOCOL_SMB2_02) {
539 return &conn->smb2.server.gss_blob;
540 }
541
542 return &conn->smb1.server.gss_blob;
543 }
544
545 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
546 {
547 if (conn->protocol >= PROTOCOL_SMB2_02) {
548 return &conn->smb2.server.guid;
549 }
550
551 return &conn->smb1.server.guid;
552 }
553
554 bool smbXcli_conn_get_force_channel_sequence(struct smbXcli_conn *conn)
555 {
556 return conn->smb2.force_channel_sequence;
557 }
558
559 void smbXcli_conn_set_force_channel_sequence(struct smbXcli_conn *conn,
560 bool v)
561 {
562 conn->smb2.force_channel_sequence = v;
563 }
564
565 struct smbXcli_conn_samba_suicide_state {
566 struct smbXcli_conn *conn;
567 struct iovec iov;
568 uint8_t buf[9];
569 struct tevent_req *write_req;
570 };
571
572 static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
573 enum tevent_req_state req_state);
574 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
575
576 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
577 struct tevent_context *ev,
578 struct smbXcli_conn *conn,
579 uint8_t exitcode)
580 {
581 struct tevent_req *req, *subreq;
582 struct smbXcli_conn_samba_suicide_state *state;
583
584 req = tevent_req_create(mem_ctx, &state,
585 struct smbXcli_conn_samba_suicide_state);
586 if (req == NULL) {
587 return NULL;
588 }
589 state->conn = conn;
590 SIVAL(state->buf, 4, 0x74697865);
591 SCVAL(state->buf, 8, exitcode);
592 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
593
594 if (conn->suicide_req != NULL) {
595 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
596 return tevent_req_post(req, ev);
597 }
598
599 state->iov.iov_base = state->buf;
600 state->iov.iov_len = sizeof(state->buf);
601
602 subreq = writev_send(state, ev, conn->outgoing, conn->sock_fd,
603 false, &state->iov, 1);
604 if (tevent_req_nomem(subreq, req)) {
605 return tevent_req_post(req, ev);
606 }
607 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
608 state->write_req = subreq;
609
610 tevent_req_set_cleanup_fn(req, smbXcli_conn_samba_suicide_cleanup);
611
612 /*
613 * We need to use tevent_req_defer_callback()
614 * in order to allow smbXcli_conn_disconnect()
615 * to do a safe cleanup.
616 */
617 tevent_req_defer_callback(req, ev);
618 conn->suicide_req = req;
619
620 return req;
621 }
622
623 static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
624 enum tevent_req_state req_state)
625 {
626 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
627 req, struct smbXcli_conn_samba_suicide_state);
628
629 TALLOC_FREE(state->write_req);
630
631 if (state->conn == NULL) {
632 return;
633 }
634
635 if (state->conn->suicide_req == req) {
636 state->conn->suicide_req = NULL;
637 }
638 state->conn = NULL;
639 }
640
641 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
642 {
643 struct tevent_req *req = tevent_req_callback_data(
644 subreq, struct tevent_req);
645 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
646 req, struct smbXcli_conn_samba_suicide_state);
647 ssize_t nwritten;
648 int err;
649
650 state->write_req = NULL;
651
652 nwritten = writev_recv(subreq, &err);
653 TALLOC_FREE(subreq);
654 if (nwritten == -1) {
655 /* here, we need to notify all pending requests */
656 NTSTATUS status = map_nt_error_from_unix_common(err);
657 smbXcli_conn_disconnect(state->conn, status);
658 return;
659 }
660 tevent_req_done(req);
661 }
662
663 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
664 {
665 return tevent_req_simple_recv_ntstatus(req);
666 }
667
668 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
669 uint8_t exitcode)
670 {
671 TALLOC_CTX *frame = talloc_stackframe();
672 struct tevent_context *ev;
673 struct tevent_req *req;
674 NTSTATUS status = NT_STATUS_NO_MEMORY;
675 bool ok;
676
677 if (smbXcli_conn_has_async_calls(conn)) {
678 /*
679 * Can't use sync call while an async call is in flight
680 */
681 status = NT_STATUS_INVALID_PARAMETER_MIX;
682 goto fail;
683 }
684 ev = samba_tevent_context_init(frame);
685 if (ev == NULL) {
686 goto fail;
687 }
688 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
689 if (req == NULL) {
690 goto fail;
691 }
692 ok = tevent_req_poll_ntstatus(req, ev, &status);
693 if (!ok) {
694 goto fail;
695 }
696 status = smbXcli_conn_samba_suicide_recv(req);
697 fail:
698 TALLOC_FREE(frame);
699 return status;
700 }
701
702 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
703 {
704 return conn->smb1.capabilities;
705 }
706
707 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
708 {
709 return conn->smb1.max_xmit;
710 }
711
712 bool smb1cli_conn_req_possible(struct smbXcli_conn *conn)
713 {
714 size_t pending = talloc_array_length(conn->pending);
715 uint16_t possible = conn->smb1.server.max_mux;
716
717 if (pending >= possible) {
718 return false;
719 }
720
721 return true;
722 }
723
724 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
725 {
726 return conn->smb1.server.session_key;
727 }
728
729 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
730 {
731 return conn->smb1.server.challenge;
732 }
733
734 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
735 {
736 return conn->smb1.server.security_mode;
737 }
738
739 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
740 {
741 return conn->smb1.server.readbraw;
742 }
743
744 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
745 {
746 return conn->smb1.server.writebraw;
747 }
748
749 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
750 {
751 return conn->smb1.server.lockread;
752 }
753
754 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
755 {
756 return conn->smb1.server.writeunlock;
757 }
758
759 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
760 {
761 return conn->smb1.server.time_zone;
762 }
763
764 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
765 const DATA_BLOB user_session_key,
766 const DATA_BLOB response)
767 {
768 return smb_signing_activate(conn->smb1.signing,
769 user_session_key,
770 response);
771 }
772
773 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
774 const uint8_t *buf, uint32_t seqnum)
775 {
776 const uint8_t *hdr = buf + NBT_HDR_SIZE;
777 size_t len = smb_len_nbt(buf);
778
779 return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
780 }
781
782 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
783 {
784 return smb_signing_is_active(conn->smb1.signing);
785 }
786
787 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
788 struct smb_trans_enc_state *es)
789 {
790 /* Replace the old state, if any. */
791 if (conn->smb1.trans_enc) {
792 TALLOC_FREE(conn->smb1.trans_enc);
793 }
794 conn->smb1.trans_enc = es;
795 }
796
797 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
798 {
799 return common_encryption_on(conn->smb1.trans_enc);
800 }
801
802
803 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
804 {
805 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
806 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
807
808 if (NT_STATUS_IS_OK(status)) {
809 return NT_STATUS_OK;
810 }
811
812 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
813 return status;
814 }
815
816 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
817 }
818
819 /**
820 * Is the SMB command able to hold an AND_X successor
821 * @param[in] cmd The SMB command in question
822 * @retval Can we add a chained request after "cmd"?
823 */
824 bool smb1cli_is_andx_req(uint8_t cmd)
825 {
826 switch (cmd) {
827 case SMBtconX:
828 case SMBlockingX:
829 case SMBopenX:
830 case SMBreadX:
831 case SMBwriteX:
832 case SMBsesssetupX:
833 case SMBulogoffX:
834 case SMBntcreateX:
835 return true;
836 break;
837 default:
838 break;
839 }
840
841 return false;
842 }
843
844 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
845 {
846 size_t num_pending = talloc_array_length(conn->pending);
847 uint16_t result;
848
849 if (conn->protocol == PROTOCOL_NONE) {
850 /*
851 * This is what windows sends on the SMB1 Negprot request
852 * and some vendors reuse the SMB1 MID as SMB2 sequence number.
853 */
854 return 0;
855 }
856
857 while (true) {
858 size_t i;
859
860 result = conn->smb1.mid++;
861 if ((result == 0) || (result == 0xffff)) {
862 continue;
863 }
864
865 for (i=0; i<num_pending; i++) {
866 if (result == smb1cli_req_mid(conn->pending[i])) {
867 break;
868 }
869 }
870
871 if (i == num_pending) {
872 return result;
873 }
874 }
875 }
876
877 static NTSTATUS smbXcli_req_cancel_write_req(struct tevent_req *req)
878 {
879 struct smbXcli_req_state *state =
880 tevent_req_data(req,
881 struct smbXcli_req_state);
882 struct smbXcli_conn *conn = state->conn;
883 size_t num_pending = talloc_array_length(conn->pending);
884 ssize_t ret;
885 int err;
886 bool ok;
887
888 if (state->write_req == NULL) {
889 return NT_STATUS_OK;
890 }
891
892 /*
893 * Check if it's possible to cancel the request.
894 * If the result is true it's not too late.
895 * See writev_cancel().
896 */
897 ok = tevent_req_cancel(state->write_req);
898 if (ok) {
899 TALLOC_FREE(state->write_req);
900
901 if (conn->protocol >= PROTOCOL_SMB2_02) {
902 /*
903 * SMB2 has a sane signing state.
904 */
905 return NT_STATUS_OK;
906 }
907
908 if (num_pending > 1) {
909 /*
910 * We have more pending requests following us. This
911 * means the signing state will be broken for them.
912 *
913 * As a solution we could add the requests directly to
914 * our outgoing queue and do the signing in the trigger
915 * function and then use writev_send() without passing a
916 * queue. That way we'll only sign packets we're most
917 * likely send to the wire.
918 */
919 return NT_STATUS_REQUEST_OUT_OF_SEQUENCE;
920 }
921
922 /*
923 * If we're the only request that's
924 * pending, we're able to recover the signing
925 * state.
926 */
927 smb_signing_cancel_reply(conn->smb1.signing,
928 state->smb1.one_way_seqnum);
929 return NT_STATUS_OK;
930 }
931
932 ret = writev_recv(state->write_req, &err);
933 TALLOC_FREE(state->write_req);
934 if (ret == -1) {
935 return map_nt_error_from_unix_common(err);
936 }
937
938 return NT_STATUS_OK;
939 }
940
941 void smbXcli_req_unset_pending(struct tevent_req *req)
942 {
943 struct smbXcli_req_state *state =
944 tevent_req_data(req,
945 struct smbXcli_req_state);
946 struct smbXcli_conn *conn = state->conn;
947 size_t num_pending = talloc_array_length(conn->pending);
948 size_t i;
949 NTSTATUS cancel_status;
950
951 cancel_status = smbXcli_req_cancel_write_req(req);
952
953 if (state->smb1.mid != 0) {
954 /*
955 * This is a [nt]trans[2] request which waits
956 * for more than one reply.
957 */
958 if (!NT_STATUS_IS_OK(cancel_status)) {
959 /*
960 * If the write_req cancel didn't work
961 * we can't use the connection anymore.
962 */
963 smbXcli_conn_disconnect(conn, cancel_status);
964 return;
965 }
966 return;
967 }
968
969 tevent_req_set_cleanup_fn(req, NULL);
970
971 if (num_pending == 1) {
972 /*
973 * The pending read_smb tevent_req is a child of
974 * conn->pending. So if nothing is pending anymore, we need to
975 * delete the socket read fde.
976 */
977 /* TODO: smbXcli_conn_cancel_read_req */
978 TALLOC_FREE(conn->pending);
979 conn->read_smb_req = NULL;
980
981 if (!NT_STATUS_IS_OK(cancel_status)) {
982 /*
983 * If the write_req cancel didn't work
984 * we can't use the connection anymore.
985 */
986 smbXcli_conn_disconnect(conn, cancel_status);
987 return;
988 }
989 return;
990 }
991
992 for (i=0; i<num_pending; i++) {
993 if (req == conn->pending[i]) {
994 break;
995 }
996 }
997 if (i == num_pending) {
998 /*
999 * Something's seriously broken. Just returning here is the
1000 * right thing nevertheless, the point of this routine is to
1001 * remove ourselves from conn->pending.
1002 */
1003
1004 if (!NT_STATUS_IS_OK(cancel_status)) {
1005 /*
1006 * If the write_req cancel didn't work
1007 * we can't use the connection anymore.
1008 */
1009 smbXcli_conn_disconnect(conn, cancel_status);
1010 return;
1011 }
1012 return;
1013 }
1014
1015 /*
1016 * Remove ourselves from the conn->pending array
1017 */
1018 for (; i < (num_pending - 1); i++) {
1019 conn->pending[i] = conn->pending[i+1];
1020 }
1021
1022 /*
1023 * No NULL check here, we're shrinking by sizeof(void *), and
1024 * talloc_realloc just adjusts the size for this.
1025 */
1026 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
1027 num_pending - 1);
1028
1029 if (!NT_STATUS_IS_OK(cancel_status)) {
1030 /*
1031 * If the write_req cancel didn't work
1032 * we can't use the connection anymore.
1033 */
1034 smbXcli_conn_disconnect(conn, cancel_status);
1035 return;
1036 }
1037 return;
1038 }
1039
1040 static void smbXcli_req_cleanup(struct tevent_req *req,
1041 enum tevent_req_state req_state)
1042 {
1043 struct smbXcli_req_state *state =
1044 tevent_req_data(req,
1045 struct smbXcli_req_state);
1046 struct smbXcli_conn *conn = state->conn;
1047 NTSTATUS cancel_status;
1048
1049 switch (req_state) {
1050 case TEVENT_REQ_RECEIVED:
1051 /*
1052 * Make sure we really remove it from
1053 * the pending array on destruction.
1054 *
1055 * smbXcli_req_unset_pending() calls
1056 * smbXcli_req_cancel_write_req() internal
1057 */
1058 state->smb1.mid = 0;
1059 smbXcli_req_unset_pending(req);
1060 return;
1061 default:
1062 cancel_status = smbXcli_req_cancel_write_req(req);
1063 if (!NT_STATUS_IS_OK(cancel_status)) {
1064 /*
1065 * If the write_req cancel didn't work
1066 * we can't use the connection anymore.
1067 */
1068 smbXcli_conn_disconnect(conn, cancel_status);
1069 return;
1070 }
1071 return;
1072 }
1073 }
1074
1075 static bool smb1cli_req_cancel(struct tevent_req *req);
1076 static bool smb2cli_req_cancel(struct tevent_req *req);
1077
1078 static bool smbXcli_req_cancel(struct tevent_req *req)
1079 {
1080 struct smbXcli_req_state *state =
1081 tevent_req_data(req,
1082 struct smbXcli_req_state);
1083
1084 if (!smbXcli_conn_is_connected(state->conn)) {
1085 return false;
1086 }
1087
1088 if (state->conn->protocol == PROTOCOL_NONE) {
1089 return false;
1090 }
1091
1092 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
1093 return smb2cli_req_cancel(req);
1094 }
1095
1096 return smb1cli_req_cancel(req);
1097 }
1098
1099 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
1100
1101 bool smbXcli_req_set_pending(struct tevent_req *req)
1102 {
1103 struct smbXcli_req_state *state =
1104 tevent_req_data(req,
1105 struct smbXcli_req_state);
1106 struct smbXcli_conn *conn;
1107 struct tevent_req **pending;
1108 size_t num_pending;
1109
1110 conn = state->conn;
1111
1112 if (!smbXcli_conn_is_connected(conn)) {
1113 return false;
1114 }
1115
1116 num_pending = talloc_array_length(conn->pending);
1117
1118 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
1119 num_pending+1);
1120 if (pending == NULL) {
1121 return false;
1122 }
1123 pending[num_pending] = req;
1124 conn->pending = pending;
1125 tevent_req_set_cleanup_fn(req, smbXcli_req_cleanup);
1126 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1127
1128 if (!smbXcli_conn_receive_next(conn)) {
1129 /*
1130 * the caller should notify the current request
1131 *
1132 * And all other pending requests get notified
1133 * by smbXcli_conn_disconnect().
1134 */
1135 smbXcli_req_unset_pending(req);
1136 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1137 return false;
1138 }
1139
1140 return true;
1141 }
1142
1143 static void smbXcli_conn_received(struct tevent_req *subreq);
1144
1145 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
1146 {
1147 size_t num_pending = talloc_array_length(conn->pending);
1148 struct tevent_req *req;
1149 struct smbXcli_req_state *state;
1150
1151 if (conn->read_smb_req != NULL) {
1152 return true;
1153 }
1154
1155 if (num_pending == 0) {
1156 if (conn->smb2.mid < UINT64_MAX) {
1157 /* no more pending requests, so we are done for now */
1158 return true;
1159 }
1160
1161 /*
1162 * If there are no more SMB2 requests possible,
1163 * because we are out of message ids,
1164 * we need to disconnect.
1165 */
1166 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
1167 return true;
1168 }
1169
1170 req = conn->pending[0];
1171 state = tevent_req_data(req, struct smbXcli_req_state);
1172
1173 /*
1174 * We're the first ones, add the read_smb request that waits for the
1175 * answer from the server
1176 */
1177 conn->read_smb_req = read_smb_send(conn->pending,
1178 state->ev,
1179 conn->sock_fd);
1180 if (conn->read_smb_req == NULL) {
1181 return false;
1182 }
1183 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
1184 return true;
1185 }
1186
1187 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
1188 {
1189 struct smbXcli_session *session;
1190 int sock_fd = conn->sock_fd;
1191
1192 tevent_queue_stop(conn->outgoing);
1193
1194 conn->sock_fd = -1;
1195
1196 session = conn->sessions;
1197 if (talloc_array_length(conn->pending) == 0) {
1198 /*
1199 * if we do not have pending requests
1200 * there is no need to update the channel_sequence
1201 */
1202 session = NULL;
1203 }
1204 for (; session; session = session->next) {
1205 smb2cli_session_increment_channel_sequence(session);
1206 }
1207
1208 if (conn->suicide_req != NULL) {
1209 /*
1210 * smbXcli_conn_samba_suicide_send()
1211 * used tevent_req_defer_callback() already.
1212 */
1213 if (!NT_STATUS_IS_OK(status)) {
1214 tevent_req_nterror(conn->suicide_req, status);
1215 }
1216 conn->suicide_req = NULL;
1217 }
1218
1219 /*
1220 * Cancel all pending requests. We do not do a for-loop walking
1221 * conn->pending because that array changes in
1222 * smbXcli_req_unset_pending.
1223 */
1224 while (talloc_array_length(conn->pending) > 0) {
1225 struct tevent_req *req;
1226 struct smbXcli_req_state *state;
1227 struct tevent_req **chain;
1228 size_t num_chained;
1229 size_t i;
1230
1231 req = conn->pending[0];
1232 state = tevent_req_data(req, struct smbXcli_req_state);
1233
1234 if (state->smb1.chained_requests == NULL) {
1235 bool in_progress;
1236
1237 /*
1238 * We're dead. No point waiting for trans2
1239 * replies.
1240 */
1241 state->smb1.mid = 0;
1242
1243 smbXcli_req_unset_pending(req);
1244
1245 if (NT_STATUS_IS_OK(status)) {
1246 /* do not notify the callers */
1247 continue;
1248 }
1249
1250 in_progress = tevent_req_is_in_progress(req);
1251 if (!in_progress) {
1252 /*
1253 * already finished
1254 */
1255 continue;
1256 }
1257
1258 /*
1259 * we need to defer the callback, because we may notify
1260 * more then one caller.
1261 */
1262 tevent_req_defer_callback(req, state->ev);
1263 tevent_req_nterror(req, status);
1264 continue;
1265 }
1266
1267 chain = talloc_move(conn, &state->smb1.chained_requests);
1268 num_chained = talloc_array_length(chain);
1269
1270 for (i=0; i<num_chained; i++) {
1271 bool in_progress;
1272
1273 req = chain[i];
1274 state = tevent_req_data(req, struct smbXcli_req_state);
1275
1276 /*
1277 * We're dead. No point waiting for trans2
1278 * replies.
1279 */
1280 state->smb1.mid = 0;
1281
1282 smbXcli_req_unset_pending(req);
1283
1284 if (NT_STATUS_IS_OK(status)) {
1285 /* do not notify the callers */
1286 continue;
1287 }
1288
1289 in_progress = tevent_req_is_in_progress(req);
1290 if (!in_progress) {
1291 /*
1292 * already finished
1293 */
1294 continue;
1295 }
1296
1297 /*
1298 * we need to defer the callback, because we may notify
1299 * more than one caller.
1300 */
1301 tevent_req_defer_callback(req, state->ev);
1302 tevent_req_nterror(req, status);
1303 }
1304 TALLOC_FREE(chain);
1305 }
1306
1307 if (sock_fd != -1) {
1308 close(sock_fd);
1309 }
1310 }
1311
1312 /*
1313 * Fetch a smb request's mid. Only valid after the request has been sent by
1314 * smb1cli_req_send().
1315 */
1316 uint16_t smb1cli_req_mid(struct tevent_req *req)
1317 {
1318 struct smbXcli_req_state *state =
1319 tevent_req_data(req,
1320 struct smbXcli_req_state);
1321
1322 if (state->smb1.mid != 0) {
1323 return state->smb1.mid;
1324 }
1325
1326 return SVAL(state->smb1.hdr, HDR_MID);
1327 }
1328
1329 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1330 {
1331 struct smbXcli_req_state *state =
1332 tevent_req_data(req,
1333 struct smbXcli_req_state);
1334
1335 state->smb1.mid = mid;
1336 }
1337
1338 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1339 {
1340 struct smbXcli_req_state *state =
1341 tevent_req_data(req,
1342 struct smbXcli_req_state);
1343
1344 return state->smb1.seqnum;
1345 }
1346
1347 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1348 {
1349 struct smbXcli_req_state *state =
1350 tevent_req_data(req,
1351 struct smbXcli_req_state);
1352
1353 state->smb1.seqnum = seqnum;
1354 }
1355
1356 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1357 {
1358 ssize_t ret = iov_buflen(iov, count);
1359
1360 /* Ignore the overflow case for now ... */
1361 return ret;
1362 }
1363
1364 static void smb1cli_req_flags(enum protocol_types protocol,
1365 uint32_t smb1_capabilities,
1366 uint8_t smb_command,
1367 uint8_t additional_flags,
1368 uint8_t clear_flags,
1369 uint8_t *_flags,
1370 uint16_t additional_flags2,
1371 uint16_t clear_flags2,
1372 uint16_t *_flags2)
1373 {
1374 uint8_t flags = 0;
1375 uint16_t flags2 = 0;
1376
1377 if (protocol >= PROTOCOL_LANMAN1) {
1378 flags |= FLAG_CASELESS_PATHNAMES;
1379 flags |= FLAG_CANONICAL_PATHNAMES;
1380 }
1381
1382 if (protocol >= PROTOCOL_LANMAN2) {
1383 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1384 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1385 }
1386
1387 if (protocol >= PROTOCOL_NT1) {
1388 flags2 |= FLAGS2_IS_LONG_NAME;
1389
1390 if (smb1_capabilities & CAP_UNICODE) {
1391 flags2 |= FLAGS2_UNICODE_STRINGS;
1392 }
1393 if (smb1_capabilities & CAP_STATUS32) {
1394 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1395 }
1396 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1397 flags2 |= FLAGS2_EXTENDED_SECURITY;
1398 }
1399 }
1400
1401 flags |= additional_flags;
1402 flags &= ~clear_flags;
1403 flags2 |= additional_flags2;
1404 flags2 &= ~clear_flags2;
1405
1406 *_flags = flags;
1407 *_flags2 = flags2;
1408 }
1409
1410 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1411
1412 static bool smb1cli_req_cancel(struct tevent_req *req)
1413 {
1414 struct smbXcli_req_state *state =
1415 tevent_req_data(req,
1416 struct smbXcli_req_state);
1417 uint8_t flags;
1418 uint16_t flags2;
1419 uint32_t pid;
1420 uint16_t mid;
1421 struct tevent_req *subreq;
1422 NTSTATUS status;
1423
1424 flags = CVAL(state->smb1.hdr, HDR_FLG);
1425 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1426 pid = SVAL(state->smb1.hdr, HDR_PID);
1427 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1428 mid = SVAL(state->smb1.hdr, HDR_MID);
1429
1430 subreq = smb1cli_req_create(state, state->ev,
1431 state->conn,
1432 SMBntcancel,
1433 flags, 0,
1434 flags2, 0,
1435 0, /* timeout */
1436 pid,
1437 state->tcon,
1438 state->session,
1439 0, NULL, /* vwv */
1440 0, NULL); /* bytes */
1441 if (subreq == NULL) {
1442 return false;
1443 }
1444 smb1cli_req_set_mid(subreq, mid);
1445
1446 status = smb1cli_req_chain_submit(&subreq, 1);
1447 if (!NT_STATUS_IS_OK(status)) {
1448 TALLOC_FREE(subreq);
1449 return false;
1450 }
1451 smb1cli_req_set_mid(subreq, 0);
1452
1453 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1454
1455 return true;
1456 }
1457
1458 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1459 {
1460 /* we do not care about the result */
1461 TALLOC_FREE(subreq);
1462 }
1463
1464 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1465 struct tevent_context *ev,
1466 struct smbXcli_conn *conn,
1467 uint8_t smb_command,
1468 uint8_t additional_flags,
1469 uint8_t clear_flags,
1470 uint16_t additional_flags2,
1471 uint16_t clear_flags2,
1472 uint32_t timeout_msec,
1473 uint32_t pid,
1474 struct smbXcli_tcon *tcon,
1475 struct smbXcli_session *session,
1476 uint8_t wct, uint16_t *vwv,
1477 int iov_count,
1478 struct iovec *bytes_iov)
1479 {
1480 struct tevent_req *req;
1481 struct smbXcli_req_state *state;
1482 uint8_t flags = 0;
1483 uint16_t flags2 = 0;
1484 uint16_t uid = 0;
1485 uint16_t tid = 0;
1486 ssize_t num_bytes;
1487
1488 if (iov_count > MAX_SMB_IOV) {
1489 /*
1490 * Should not happen :-)
1491 */
1492 return NULL;
1493 }
1494
1495 req = tevent_req_create(mem_ctx, &state,
1496 struct smbXcli_req_state);
1497 if (req == NULL) {
1498 return NULL;
1499 }
1500 state->ev = ev;
1501 state->conn = conn;
1502 state->session = session;
1503 state->tcon = tcon;
1504
1505 if (session) {
1506 uid = session->smb1.session_id;
1507 }
1508
1509 if (tcon) {
1510 tid = tcon->smb1.tcon_id;
1511
1512 if (tcon->fs_attributes & FILE_CASE_SENSITIVE_SEARCH) {
1513 clear_flags |= FLAG_CASELESS_PATHNAMES;
1514 } else {
1515 /* Default setting, case insensitive. */
1516 additional_flags |= FLAG_CASELESS_PATHNAMES;
1517 }
1518
1519 if (smbXcli_conn_dfs_supported(conn) &&
1520 smbXcli_tcon_is_dfs_share(tcon))
1521 {
1522 additional_flags2 |= FLAGS2_DFS_PATHNAMES;
1523 }
1524 }
1525
1526 state->smb1.recv_cmd = 0xFF;
1527 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1528 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1529 if (state->smb1.recv_iov == NULL) {
1530 TALLOC_FREE(req);
1531 return NULL;
1532 }
1533
1534 smb1cli_req_flags(conn->protocol,
1535 conn->smb1.capabilities,
1536 smb_command,
1537 additional_flags,
1538 clear_flags,
1539 &flags,
1540 additional_flags2,
1541 clear_flags2,
1542 &flags2);
1543
1544 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1545 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1546 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1547 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1548 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1549 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1550 SSVAL(state->smb1.hdr, HDR_TID, tid);
1551 SSVAL(state->smb1.hdr, HDR_PID, pid);
1552 SSVAL(state->smb1.hdr, HDR_UID, uid);
1553 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1554 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1555
1556 state->smb1.vwv = vwv;
1557
1558 num_bytes = iov_buflen(bytes_iov, iov_count);
1559 if (num_bytes == -1) {
1560 /*
1561 * I'd love to add a check for num_bytes<=UINT16_MAX here, but
1562 * the smbclient->samba connections can lie and transfer more.
1563 */
1564 TALLOC_FREE(req);
1565 return NULL;
1566 }
1567
1568 SSVAL(state->smb1.bytecount_buf, 0, num_bytes);
1569
1570 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1571 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1572 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1573 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1574 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1575 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1576 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1577 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1578
1579 if (iov_count != 0) {
1580 memcpy(&state->smb1.iov[4], bytes_iov,
1581 iov_count * sizeof(*bytes_iov));
1582 }
1583 state->smb1.iov_count = iov_count + 4;
1584
1585 if (timeout_msec > 0) {
1586 struct timeval endtime;
1587
1588 endtime = timeval_current_ofs_msec(timeout_msec);
1589 if (!tevent_req_set_endtime(req, ev, endtime)) {
1590 return req;
1591 }
1592 }
1593
1594 switch (smb_command) {
1595 case SMBtranss:
1596 case SMBtranss2:
1597 case SMBnttranss:
1598 state->one_way = true;
1599 break;
1600 case SMBntcancel:
1601 state->one_way = true;
1602 state->smb1.one_way_seqnum = true;
1603 break;
1604 case SMBlockingX:
1605 if ((wct == 8) &&
1606 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1607 state->one_way = true;
1608 }
1609 break;
1610 }
1611
1612 return req;
1613 }
1614
1615 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1616 struct iovec *iov, int iov_count,
1617 uint32_t *seqnum,
1618 bool one_way_seqnum)
1619 {
1620 TALLOC_CTX *frame = NULL;
1621 uint8_t *buf;
1622
1623 /*
1624 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1625 * iovec directly. MD5Update would do that just fine.
1626 */
1627
1628 if (iov_count < 4) {
1629 return NT_STATUS_INVALID_PARAMETER_MIX;
1630 }
1631 if (iov[0].iov_len != NBT_HDR_SIZE) {
1632 return NT_STATUS_INVALID_PARAMETER_MIX;
1633 }
1634 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1635 return NT_STATUS_INVALID_PARAMETER_MIX;
1636 }
1637 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1638 return NT_STATUS_INVALID_PARAMETER_MIX;
1639 }
1640 if (iov[3].iov_len != sizeof(uint16_t)) {
1641 return NT_STATUS_INVALID_PARAMETER_MIX;
1642 }
1643
1644 frame = talloc_stackframe();
1645
1646 buf = iov_concat(frame, &iov[1], iov_count - 1);
1647 if (buf == NULL) {
1648 return NT_STATUS_NO_MEMORY;
1649 }
1650
1651 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1652 one_way_seqnum);
1653 smb_signing_sign_pdu(conn->smb1.signing,
1654 buf, talloc_get_size(buf),
1655 *seqnum);
1656 memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1657
1658 TALLOC_FREE(frame);
1659 return NT_STATUS_OK;
1660 }
1661
1662 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1663 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1664 TALLOC_CTX *tmp_mem,
1665 uint8_t *inbuf);
1666
1667 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1668 struct smbXcli_req_state *state,
1669 struct iovec *iov, int iov_count)
1670 {
1671 struct tevent_req *subreq;
1672 NTSTATUS status;
1673 uint8_t cmd;
1674 uint16_t mid;
1675 ssize_t nbtlen;
1676
1677 if (!smbXcli_conn_is_connected(state->conn)) {
1678 return NT_STATUS_CONNECTION_DISCONNECTED;
1679 }
1680
1681 if (state->conn->protocol > PROTOCOL_NT1) {
1682 DBG_ERR("called for dialect[%s] server[%s]\n",
1683 smb_protocol_types_string(state->conn->protocol),
1684 smbXcli_conn_remote_name(state->conn));
1685 return NT_STATUS_REVISION_MISMATCH;
1686 }
1687
1688 if (iov_count < 4) {
1689 return NT_STATUS_INVALID_PARAMETER_MIX;
1690 }
1691 if (iov[0].iov_len != NBT_HDR_SIZE) {
1692 return NT_STATUS_INVALID_PARAMETER_MIX;
1693 }
1694 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1695 return NT_STATUS_INVALID_PARAMETER_MIX;
1696 }
1697 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1698 return NT_STATUS_INVALID_PARAMETER_MIX;
1699 }
1700 if (iov[3].iov_len != sizeof(uint16_t)) {
1701 return NT_STATUS_INVALID_PARAMETER_MIX;
1702 }
1703
1704 cmd = CVAL(iov[1].iov_base, HDR_COM);
1705 if (cmd == SMBreadBraw) {
1706 if (smbXcli_conn_has_async_calls(state->conn)) {
1707 return NT_STATUS_INVALID_PARAMETER_MIX;
1708 }
1709 state->conn->smb1.read_braw_req = req;
1710 }
1711
1712 if (state->smb1.mid != 0) {
1713 mid = state->smb1.mid;
1714 } else {
1715 mid = smb1cli_alloc_mid(state->conn);
1716 }
1717 SSVAL(iov[1].iov_base, HDR_MID, mid);
1718
1719 nbtlen = iov_buflen(&iov[1], iov_count-1);
1720 if ((nbtlen == -1) || (nbtlen > 0x1FFFF)) {
1721 return NT_STATUS_INVALID_PARAMETER_MIX;
1722 }
1723
1724 _smb_setlen_nbt(iov[0].iov_base, nbtlen);
1725
1726 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1727 &state->smb1.seqnum,
1728 state->smb1.one_way_seqnum);
1729
1730 if (!NT_STATUS_IS_OK(status)) {
1731 return status;
1732 }
1733
1734 /*
1735 * If we supported multiple encrytion contexts
1736 * here we'd look up based on tid.
1737 */
1738 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1739 char *buf, *enc_buf;
1740
1741 buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
1742 if (buf == NULL) {
1743 return NT_STATUS_NO_MEMORY;
1744 }
1745 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1746 (char *)buf, &enc_buf);
1747 TALLOC_FREE(buf);
1748 if (!NT_STATUS_IS_OK(status)) {
1749 DEBUG(0, ("Error in encrypting client message: %s\n",
1750 nt_errstr(status)));
1751 return status;
1752 }
1753 buf = (char *)talloc_memdup(state, enc_buf,
1754 smb_len_nbt(enc_buf)+4);
1755 SAFE_FREE(enc_buf);
1756 if (buf == NULL) {
1757 return NT_STATUS_NO_MEMORY;
1758 }
1759 iov[0].iov_base = (void *)buf;
1760 iov[0].iov_len = talloc_get_size(buf);
1761 iov_count = 1;
1762 }
1763
1764 if (state->conn->dispatch_incoming == NULL) {
1765 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1766 }
1767
1768 if (!smbXcli_req_set_pending(req)) {
1769 return NT_STATUS_NO_MEMORY;
1770 }
1771
1772 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1773
1774 subreq = writev_send(state, state->ev, state->conn->outgoing,
1775 state->conn->sock_fd, false, iov, iov_count);
1776 if (subreq == NULL) {
1777 return NT_STATUS_NO_MEMORY;
1778 }
1779 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1780 state->write_req = subreq;
1781
1782 return NT_STATUS_OK;
1783 }
1784
1785 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1786 struct tevent_context *ev,
1787 struct smbXcli_conn *conn,
1788 uint8_t smb_command,
1789 uint8_t additional_flags,
1790 uint8_t clear_flags,
1791 uint16_t additional_flags2,
1792 uint16_t clear_flags2,
1793 uint32_t timeout_msec,
1794 uint32_t pid,
1795 struct smbXcli_tcon *tcon,
1796 struct smbXcli_session *session,
1797 uint8_t wct, uint16_t *vwv,
1798 uint32_t num_bytes,
1799 const uint8_t *bytes)
1800 {
1801 struct tevent_req *req;
1802 struct iovec iov;
1803 NTSTATUS status;
1804
1805 iov.iov_base = discard_const_p(void, bytes);
1806 iov.iov_len = num_bytes;
1807
1808 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1809 additional_flags, clear_flags,
1810 additional_flags2, clear_flags2,
1811 timeout_msec,
1812 pid, tcon, session,
1813 wct, vwv, 1, &iov);
1814 if (req == NULL) {
1815 return NULL;
1816 }
1817 if (!tevent_req_is_in_progress(req)) {
1818 return tevent_req_post(req, ev);
1819 }
1820 status = smb1cli_req_chain_submit(&req, 1);
1821 if (tevent_req_nterror(req, status)) {
1822 return tevent_req_post(req, ev);
1823 }
1824 return req;
1825 }
1826
1827 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1828 {
1829 struct tevent_req *req =
1830 tevent_req_callback_data(subreq,
1831 struct tevent_req);
1832 struct smbXcli_req_state *state =
1833 tevent_req_data(req,
1834 struct smbXcli_req_state);
1835 ssize_t nwritten;
1836 int err;
1837
1838 state->write_req = NULL;
1839
1840 nwritten = writev_recv(subreq, &err);
1841 TALLOC_FREE(subreq);
1842 if (nwritten == -1) {
1843 /* here, we need to notify all pending requests */
1844 NTSTATUS status = map_nt_error_from_unix_common(err);
1845 smbXcli_conn_disconnect(state->conn, status);
1846 return;
1847 }
1848
1849 if (state->one_way) {
1850 state->inbuf = NULL;
1851 tevent_req_done(req);
1852 return;
1853 }
1854 }
1855
1856 static void smbXcli_conn_received(struct tevent_req *subreq)
1857 {
1858 struct smbXcli_conn *conn =
1859 tevent_req_callback_data(subreq,
1860 struct smbXcli_conn);
1861 TALLOC_CTX *frame = talloc_stackframe();
1862 NTSTATUS status;
1863 uint8_t *inbuf;
1864 ssize_t received;
1865 int err;
1866
1867 if (subreq != conn->read_smb_req) {
1868 DEBUG(1, ("Internal error: cli_smb_received called with "
1869 "unexpected subreq\n"));
1870 smbXcli_conn_disconnect(conn, NT_STATUS_INTERNAL_ERROR);
1871 TALLOC_FREE(frame);
1872 return;
1873 }
1874 conn->read_smb_req = NULL;
1875
1876 received = read_smb_recv(subreq, frame, &inbuf, &err);
1877 TALLOC_FREE(subreq);
1878 if (received == -1) {
1879 status = map_nt_error_from_unix_common(err);
1880 smbXcli_conn_disconnect(conn, status);
1881 TALLOC_FREE(frame);
1882 return;
1883 }
1884
1885 status = conn->dispatch_incoming(conn, frame, inbuf);
1886 TALLOC_FREE(frame);
1887 if (NT_STATUS_IS_OK(status)) {
1888 /*
1889 * We should not do any more processing
1890 * as the dispatch function called
1891 * tevent_req_done().
1892 */
1893 return;
1894 }
1895
1896 if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1897 /*
1898 * We got an error, so notify all pending requests
1899 */
1900 smbXcli_conn_disconnect(conn, status);
1901 return;
1902 }
1903
1904 /*
1905 * We got NT_STATUS_RETRY, so we may ask for a
1906 * next incoming pdu.
1907 */
1908 if (!smbXcli_conn_receive_next(conn)) {
1909 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1910 }
1911 }
1912
1913 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1914 struct iovec **piov, int *pnum_iov)
1915 {
1916 struct iovec *iov;
1917 size_t num_iov;
1918 size_t buflen;
1919 size_t taken;
1920 size_t remaining;
1921 uint8_t *hdr;
1922 uint8_t cmd;
1923 uint32_t wct_ofs;
1924 NTSTATUS status;
1925 size_t min_size = MIN_SMB_SIZE;
1926
1927 buflen = smb_len_tcp(buf);
1928 taken = 0;
1929
1930 hdr = buf + NBT_HDR_SIZE;
1931
1932 status = smb1cli_pull_raw_error(hdr);
1933 if (NT_STATUS_IS_ERR(status)) {
1934 /*
1935 * This is an ugly hack to support OS/2
1936 * which skips the byte_count in the DATA block
1937 * on some error responses.
1938 *
1939 * See bug #9096
1940 */
1941 min_size -= sizeof(uint16_t);
1942 }
1943
1944 if (buflen < min_size) {
1945 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1946 }
1947
1948 /*
1949 * This returns iovec elements in the following order:
1950 *
1951 * - SMB header
1952 *
1953 * - Parameter Block
1954 * - Data Block
1955 *
1956 * - Parameter Block
1957 * - Data Block
1958 *
1959 * - Parameter Block
1960 * - Data Block
1961 */
1962 num_iov = 1;
1963
1964 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1965 if (iov == NULL) {
1966 return NT_STATUS_NO_MEMORY;
1967 }
1968 iov[0].iov_base = hdr;
1969 iov[0].iov_len = HDR_WCT;
1970 taken += HDR_WCT;
1971
1972 cmd = CVAL(hdr, HDR_COM);
1973 wct_ofs = HDR_WCT;
1974
1975 while (true) {
1976 size_t len = buflen - taken;
1977 struct iovec *cur;
1978 struct iovec *iov_tmp;
1979 uint8_t wct;
1980 uint32_t bcc_ofs;
1981 uint16_t bcc;
1982 size_t needed;
1983
1984 /*
1985 * we need at least WCT
1986 */
1987 needed = sizeof(uint8_t);
1988 if (len < needed) {
1989 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1990 __location__, (int)len, (int)needed));
1991 goto inval;
1992 }
1993
1994 /*
1995 * Now we check if the specified words are there
1996 */
1997 wct = CVAL(hdr, wct_ofs);
1998 needed += wct * sizeof(uint16_t);
1999 if (len < needed) {
2000 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
2001 __location__, (int)len, (int)needed));
2002 goto inval;
2003 }
2004
2005 if ((num_iov == 1) &&
2006 (len == needed) &&
2007 NT_STATUS_IS_ERR(status))
2008 {
2009 /*
2010 * This is an ugly hack to support OS/2
2011 * which skips the byte_count in the DATA block
2012 * on some error responses.
2013 *
2014 * See bug #9096
2015 */
2016 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
2017 num_iov + 2);
2018 if (iov_tmp == NULL) {
2019 TALLOC_FREE(iov);
2020 return NT_STATUS_NO_MEMORY;
2021 }
2022 iov = iov_tmp;
2023 cur = &iov[num_iov];
2024 num_iov += 2;
2025
2026 cur[0].iov_len = 0;
2027 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
2028 cur[1].iov_len = 0;
2029 cur[1].iov_base = cur[0].iov_base;
2030
2031 taken += needed;
2032 break;
2033 }
2034
2035 /*
2036 * we need at least BCC
2037 */
2038 needed += sizeof(uint16_t);
2039 if (len < needed) {
2040 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
2041 __location__, (int)len, (int)needed));
2042 goto inval;
2043 }
2044
2045 /*
2046 * Now we check if the specified bytes are there
2047 */
2048 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
2049 bcc = SVAL(hdr, bcc_ofs);
2050 needed += bcc * sizeof(uint8_t);
2051 if (len < needed) {
2052 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
2053 __location__, (int)len, (int)needed));
2054 goto inval;
2055 }
2056
2057 /*
2058 * we allocate 2 iovec structures for words and bytes
2059 */
2060 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
2061 num_iov + 2);
2062 if (iov_tmp == NULL) {
2063 TALLOC_FREE(iov);
2064 return NT_STATUS_NO_MEMORY;
2065 }
2066 iov = iov_tmp;
2067 cur = &iov[num_iov];
2068 num_iov += 2;
2069
2070 cur[0].iov_len = wct * sizeof(uint16_t);
2071 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
2072 cur[1].iov_len = bcc * sizeof(uint8_t);
2073 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
2074
2075 taken += needed;
2076
2077 if (!smb1cli_is_andx_req(cmd)) {
2078 /*
2079 * If the current command does not have AndX chanining
2080 * we are done.
2081 */
2082 break;
2083 }
2084
2085 if (wct == 0 && bcc == 0) {
2086 /*
2087 * An empty response also ends the chain,
2088 * most likely with an error.
2089 */
2090 break;
2091 }
2092
2093 if (wct < 2) {
2094 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
2095 __location__, (int)wct, (int)cmd));
2096 goto inval;
2097 }
2098 cmd = CVAL(cur[0].iov_base, 0);
2099 if (cmd == 0xFF) {
2100 /*
2101 * If it is the end of the chain we are also done.
2102 */
2103 break;
2104 }
2105 wct_ofs = SVAL(cur[0].iov_base, 2);
2106
2107 if (wct_ofs < taken) {
2108 goto inval;
2109 }
2110 if (wct_ofs > buflen) {
2111 goto inval;
2112 }
2113
2114 /*
2115 * we consumed everything up to the start of the next
2116 * parameter block.
2117 */
2118 taken = wct_ofs;
2119 }
2120
2121 remaining = buflen - taken;
2122
2123 if (remaining > 0 && num_iov >= 3) {
2124 /*
2125 * The last DATA block gets the remaining
2126 * bytes, this is needed to support
2127 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
2128 */
2129 iov[num_iov-1].iov_len += remaining;
2130 }
2131
2132 *piov = iov;
2133 *pnum_iov = num_iov;
2134 return NT_STATUS_OK;
2135
2136 inval:
2137 TALLOC_FREE(iov);
2138 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2139 }
2140
2141 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2142 TALLOC_CTX *tmp_mem,
2143 uint8_t *inbuf)
2144 {
2145 struct tevent_req *req;
2146 struct smbXcli_req_state *state;
2147 NTSTATUS status;
2148 size_t num_pending;
2149 size_t i;
2150 uint8_t cmd;
2151 uint16_t mid;
2152 bool oplock_break;
2153 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
2154 size_t len = smb_len_tcp(inbuf);
2155 struct iovec *iov = NULL;
2156 int num_iov = 0;
2157 struct tevent_req **chain = NULL;
2158 size_t num_chained = 0;
2159 size_t num_responses = 0;
2160
2161 if (conn->smb1.read_braw_req != NULL) {
2162 req = conn->smb1.read_braw_req;
2163 conn->smb1.read_braw_req = NULL;
2164 state = tevent_req_data(req, struct smbXcli_req_state);
2165
2166 smbXcli_req_unset_pending(req);
2167
2168 if (state->smb1.recv_iov == NULL) {
2169 /*
2170 * For requests with more than
2171 * one response, we have to readd the
2172 * recv_iov array.
2173 */
2174 state->smb1.recv_iov = talloc_zero_array(state,
2175 struct iovec,
2176 3);
2177 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2178 return NT_STATUS_OK;
2179 }
2180 }
2181
2182 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
2183 state->smb1.recv_iov[0].iov_len = len;
2184 ZERO_STRUCT(state->smb1.recv_iov[1]);
2185 ZERO_STRUCT(state->smb1.recv_iov[2]);
2186
2187 state->smb1.recv_cmd = SMBreadBraw;
2188 state->smb1.recv_status = NT_STATUS_OK;
2189 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2190
2191 tevent_req_done(req);
2192 return NT_STATUS_OK;
2193 }
2194
2195 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
2196 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
2197 DEBUG(10, ("Got non-SMB PDU\n"));
2198 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2199 }
2200
2201 /*
2202 * If we supported multiple encrytion contexts
2203 * here we'd look up based on tid.
2204 */
2205 if (common_encryption_on(conn->smb1.trans_enc)
2206 && (CVAL(inbuf, 0) == 0)) {
2207 uint16_t enc_ctx_num;
2208
2209 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
2210 if (!NT_STATUS_IS_OK(status)) {
2211 DEBUG(10, ("get_enc_ctx_num returned %s\n",
2212 nt_errstr(status)));
2213 return status;
2214 }
2215
2216 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
2217 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
2218 enc_ctx_num,
2219 conn->smb1.trans_enc->enc_ctx_num));
2220 return NT_STATUS_INVALID_HANDLE;
2221 }
2222
2223 status = common_decrypt_buffer(conn->smb1.trans_enc,
2224 (char *)inbuf);
2225 if (!NT_STATUS_IS_OK(status)) {
2226 DEBUG(10, ("common_decrypt_buffer returned %s\n",
2227 nt_errstr(status)));
2228 return status;
2229 }
2230 inhdr = inbuf + NBT_HDR_SIZE;
2231 len = smb_len_nbt(inbuf);
2232 }
2233
2234 mid = SVAL(inhdr, HDR_MID);
2235 num_pending = talloc_array_length(conn->pending);
2236
2237 for (i=0; i<num_pending; i++) {
2238 if (mid == smb1cli_req_mid(conn->pending[i])) {
2239 break;
2240 }
2241 }
2242 if (i == num_pending) {
2243 /* Dump unexpected reply */
2244 return NT_STATUS_RETRY;
2245 }
2246
2247 oplock_break = false;
2248
2249 if (mid == 0xffff) {
2250 /*
2251 * Paranoia checks that this is really an oplock break request.
2252 */
2253 oplock_break = (len == 51); /* hdr + 8 words */
2254 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
2255 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
2256 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
2257 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
2258
2259 if (!oplock_break) {
2260 /* Dump unexpected reply */
2261 return NT_STATUS_RETRY;
2262 }
2263 }
2264
2265 req = conn->pending[i];
2266 state = tevent_req_data(req, struct smbXcli_req_state);
2267
2268 if (!oplock_break /* oplock breaks are not signed */
2269 && !smb_signing_check_pdu(conn->smb1.signing,
2270 inhdr, len, state->smb1.seqnum+1)) {
2271 DEBUG(10, ("cli_check_sign_mac failed\n"));
2272 return NT_STATUS_ACCESS_DENIED;
2273 }
2274
2275 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
2276 &iov, &num_iov);
2277 if (!NT_STATUS_IS_OK(status)) {
2278 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
2279 nt_errstr(status)));
2280 return status;
2281 }
2282
2283 cmd = CVAL(inhdr, HDR_COM);
2284 status = smb1cli_pull_raw_error(inhdr);
2285
2286 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
2287 (state->session != NULL) && state->session->disconnect_expired)
2288 {
2289 /*
2290 * this should be a short term hack
2291 * until the upper layers have implemented
2292 * re-authentication.
2293 */
2294 return status;
2295 }
2296
2297 if (state->smb1.chained_requests == NULL) {
2298 if (num_iov != 3) {
2299 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2300 }
2301
2302 smbXcli_req_unset_pending(req);
2303
2304 if (state->smb1.recv_iov == NULL) {
2305 /*
2306 * For requests with more than
2307 * one response, we have to readd the
2308 * recv_iov array.
2309 */
2310 state->smb1.recv_iov = talloc_zero_array(state,
2311 struct iovec,
2312 3);
2313 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2314 return NT_STATUS_OK;
2315 }
2316 }
2317
2318 state->smb1.recv_cmd = cmd;
2319 state->smb1.recv_status = status;
2320 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2321
2322 state->smb1.recv_iov[0] = iov[0];
2323 state->smb1.recv_iov[1] = iov[1];
2324 state->smb1.recv_iov[2] = iov[2];
2325
2326 if (talloc_array_length(conn->pending) == 0) {
2327 tevent_req_done(req);
2328 return NT_STATUS_OK;
2329 }
2330
2331 tevent_req_defer_callback(req, state->ev);
2332 tevent_req_done(req);
2333 return NT_STATUS_RETRY;
2334 }
2335
2336 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2337 num_chained = talloc_array_length(chain);
2338 num_responses = (num_iov - 1)/2;
2339
2340 if (num_responses > num_chained) {
2341 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2342 }
2343
2344 for (i=0; i<num_chained; i++) {
2345 size_t iov_idx = 1 + (i*2);
2346 struct iovec *cur = &iov[iov_idx];
2347 uint8_t *inbuf_ref;
2348
2349 req = chain[i];
2350 state = tevent_req_data(req, struct smbXcli_req_state);
2351
2352 smbXcli_req_unset_pending(req);
2353
2354 /*
2355 * as we finish multiple requests here
2356 * we need to defer the callbacks as
2357 * they could destroy our current stack state.
2358 */
2359 tevent_req_defer_callback(req, state->ev);
2360
2361 if (i >= num_responses) {
2362 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2363 continue;
2364 }
2365
2366 if (state->smb1.recv_iov == NULL) {
2367 /*
2368 * For requests with more than
2369 * one response, we have to readd the
2370 * recv_iov array.
2371 */
2372 state->smb1.recv_iov = talloc_zero_array(state,
2373 struct iovec,
2374 3);
2375 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2376 continue;
2377 }
2378 }
2379
2380 state->smb1.recv_cmd = cmd;
2381
2382 if (i == (num_responses - 1)) {
2383 /*
2384 * The last request in the chain gets the status
2385 */
2386 state->smb1.recv_status = status;
2387 } else {
2388 cmd = CVAL(cur[0].iov_base, 0);
2389 state->smb1.recv_status = NT_STATUS_OK;
2390 }
2391
2392 state->inbuf = inbuf;
2393
2394 /*
2395 * Note: here we use talloc_reference() in a way
2396 * that does not expose it to the caller.
2397 */
2398 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2399 if (tevent_req_nomem(inbuf_ref, req)) {
2400 continue;
2401 }
2402
2403 /* copy the related buffers */
2404 state->smb1.recv_iov[0] = iov[0];
2405 state->smb1.recv_iov[1] = cur[0];
2406 state->smb1.recv_iov[2] = cur[1];
2407
2408 tevent_req_done(req);
2409 }
2410
2411 return NT_STATUS_RETRY;
2412 }
2413
2414 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2415 TALLOC_CTX *mem_ctx,
2416 struct iovec **piov,
2417 uint8_t **phdr,
2418 uint8_t *pwct,
2419 uint16_t **pvwv,
2420 uint32_t *pvwv_offset,
2421 uint32_t *pnum_bytes,
2422 uint8_t **pbytes,
2423 uint32_t *pbytes_offset,
2424 uint8_t **pinbuf,
2425 const struct smb1cli_req_expected_response *expected,
2426 size_t num_expected)
2427 {
2428 struct smbXcli_req_state *state =
2429 tevent_req_data(req,
2430 struct smbXcli_req_state);
2431 NTSTATUS status = NT_STATUS_OK;
2432 struct iovec *recv_iov = NULL;
2433 uint8_t *hdr = NULL;
2434 uint8_t wct = 0;
2435 uint32_t vwv_offset = 0;
2436 uint16_t *vwv = NULL;
2437 uint32_t num_bytes = 0;
2438 uint32_t bytes_offset = 0;
2439 uint8_t *bytes = NULL;
2440 size_t i;
2441 bool found_status = false;
2442 bool found_size = false;
2443
2444 if (piov != NULL) {
2445 *piov = NULL;
2446 }
2447 if (phdr != NULL) {
2448 *phdr = 0;
2449 }
2450 if (pwct != NULL) {
2451 *pwct = 0;
2452 }
2453 if (pvwv != NULL) {
2454 *pvwv = NULL;
2455 }
2456 if (pvwv_offset != NULL) {
2457 *pvwv_offset = 0;
2458 }
2459 if (pnum_bytes != NULL) {
2460 *pnum_bytes = 0;
2461 }
2462 if (pbytes != NULL) {
2463 *pbytes = NULL;
2464 }
2465 if (pbytes_offset != NULL) {
2466 *pbytes_offset = 0;
2467 }
2468 if (pinbuf != NULL) {
2469 *pinbuf = NULL;
2470 }
2471
2472 if (state->inbuf != NULL) {
2473 recv_iov = state->smb1.recv_iov;
2474 state->smb1.recv_iov = NULL;
2475 if (state->smb1.recv_cmd != SMBreadBraw) {
2476 hdr = (uint8_t *)recv_iov[0].iov_base;
2477 wct = recv_iov[1].iov_len/2;
2478 vwv = (uint16_t *)recv_iov[1].iov_base;
2479 vwv_offset = PTR_DIFF(vwv, hdr);
2480 num_bytes = recv_iov[2].iov_len;
2481 bytes = (uint8_t *)recv_iov[2].iov_base;
2482 bytes_offset = PTR_DIFF(bytes, hdr);
2483 }
2484 }
2485
2486 if (tevent_req_is_nterror(req, &status)) {
2487 for (i=0; i < num_expected; i++) {
2488 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2489 found_status = true;
2490 break;
2491 }
2492 }
2493
2494 if (found_status) {
2495 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2496 }
2497
2498 return status;
2499 }
2500
2501 if (num_expected == 0) {
2502 found_status = true;
2503 found_size = true;
2504 }
2505
2506 status = state->smb1.recv_status;
2507
2508 for (i=0; i < num_expected; i++) {
2509 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2510 continue;
2511 }
2512
2513 found_status = true;
2514 if (expected[i].wct == 0) {
2515 found_size = true;
2516 break;
2517 }
2518
2519 if (expected[i].wct == wct) {
2520 found_size = true;
2521 break;
2522 }
2523 }
2524
2525 if (!found_status) {
2526 return status;
2527 }
2528
2529 if (!found_size) {
2530 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2531 }
2532
2533 if (piov != NULL) {
2534 *piov = talloc_move(mem_ctx, &recv_iov);
2535 }
2536
2537 if (phdr != NULL) {
2538 *phdr = hdr;
2539 }
2540 if (pwct != NULL) {
2541 *pwct = wct;
2542 }
2543 if (pvwv != NULL) {
2544 *pvwv = vwv;
2545 }
2546 if (pvwv_offset != NULL) {
2547 *pvwv_offset = vwv_offset;
2548 }
2549 if (pnum_bytes != NULL) {
2550 *pnum_bytes = num_bytes;
2551 }
2552 if (pbytes != NULL) {
2553 *pbytes = bytes;
2554 }
2555 if (pbytes_offset != NULL) {
2556 *pbytes_offset = bytes_offset;
2557 }
2558 if (pinbuf != NULL) {
2559 *pinbuf = state->inbuf;
2560 }
2561
2562 return status;
2563 }
2564
2565 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2566 {
2567 size_t wct_ofs;
2568 int i;
2569
2570 wct_ofs = HDR_WCT;
2571
2572 for (i=0; i<num_reqs; i++) {
2573 struct smbXcli_req_state *state;
2574 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2575 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2576 state->smb1.iov_count-2);
2577 wct_ofs = (wct_ofs + 3) & ~3;
2578 }
2579 return wct_ofs;
2580 }
2581
2582 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2583 {
2584 struct smbXcli_req_state *first_state =
2585 tevent_req_data(reqs[0],
2586 struct smbXcli_req_state);
2587 struct smbXcli_req_state *state;
2588 size_t wct_offset;
2589 size_t chain_padding = 0;
2590 int i, iovlen;
2591 struct iovec *iov = NULL;
2592 struct iovec *this_iov;
2593 NTSTATUS status;
2594 ssize_t nbt_len;
2595
2596 if (num_reqs == 1) {
2597 return smb1cli_req_writev_submit(reqs[0], first_state,
2598 first_state->smb1.iov,
2599 first_state->smb1.iov_count);
2600 }
2601
2602 iovlen = 0;
2603 for (i=0; i<num_reqs; i++) {
2604 if (!tevent_req_is_in_progress(reqs[i])) {
2605 return NT_STATUS_INTERNAL_ERROR;
2606 }
2607
2608 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2609
2610 if (state->smb1.iov_count < 4) {
2611 return NT_STATUS_INVALID_PARAMETER_MIX;
2612 }
2613
2614 if (i == 0) {
2615 /*
2616 * The NBT and SMB header
2617 */
2618 iovlen += 2;
2619 } else {
2620 /*
2621 * Chain padding
2622 */
2623 iovlen += 1;
2624 }
2625
2626 /*
2627 * words and bytes
2628 */
2629 iovlen += state->smb1.iov_count - 2;
2630 }
2631
2632 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2633 if (iov == NULL) {
2634 return NT_STATUS_NO_MEMORY;
2635 }
2636
2637 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2638 first_state, reqs, sizeof(*reqs) * num_reqs);
2639 if (first_state->smb1.chained_requests == NULL) {
2640 TALLOC_FREE(iov);
2641 return NT_STATUS_NO_MEMORY;
2642 }
2643
2644 wct_offset = HDR_WCT;
2645 this_iov = iov;
2646
2647 for (i=0; i<num_reqs; i++) {
2648 size_t next_padding = 0;
2649 uint16_t *vwv;
2650
2651 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2652
2653 if (i < num_reqs-1) {
2654 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2655 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2656 TALLOC_FREE(iov);
2657 TALLOC_FREE(first_state->smb1.chained_requests);
2658 return NT_STATUS_INVALID_PARAMETER_MIX;
2659 }
2660 }
2661
2662 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2663 state->smb1.iov_count-2) + 1;
2664 if ((wct_offset % 4) != 0) {
2665 next_padding = 4 - (wct_offset % 4);
2666 }
2667 wct_offset += next_padding;
2668 vwv = state->smb1.vwv;
2669
2670 if (i < num_reqs-1) {
2671 struct smbXcli_req_state *next_state =
2672 tevent_req_data(reqs[i+1],
2673 struct smbXcli_req_state);
2674 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2675 SCVAL(vwv+0, 1, 0);
2676 SSVAL(vwv+1, 0, wct_offset);
2677 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2678 /* properly end the chain */
2679 SCVAL(vwv+0, 0, 0xff);
2680 SCVAL(vwv+0, 1, 0xff);
2681 SSVAL(vwv+1, 0, 0);
2682 }
2683
2684 if (i == 0) {
2685 /*
2686 * The NBT and SMB header
2687 */
2688 this_iov[0] = state->smb1.iov[0];
2689 this_iov[1] = state->smb1.iov[1];
2690 this_iov += 2;
2691 } else {
2692 /*
2693 * This one is a bit subtle. We have to add
2694 * chain_padding bytes between the requests, and we
2695 * have to also include the wct field of the
2696 * subsequent requests. We use the subsequent header
2697 * for the padding, it contains the wct field in its
2698 * last byte.
2699 */
2700 this_iov[0].iov_len = chain_padding+1;
2701 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2702 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2703 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2704 this_iov += 1;
2705 }
2706
2707 /*
2708 * copy the words and bytes
2709 */
2710 memcpy(this_iov, state->smb1.iov+2,
2711 sizeof(struct iovec) * (state->smb1.iov_count-2));
2712 this_iov += state->smb1.iov_count - 2;
2713 chain_padding = next_padding;
2714 }
2715
2716 nbt_len = iov_buflen(&iov[1], iovlen-1);
2717 if ((nbt_len == -1) || (nbt_len > first_state->conn->smb1.max_xmit)) {
2718 TALLOC_FREE(iov);
2719 TALLOC_FREE(first_state->smb1.chained_requests);
2720 return NT_STATUS_INVALID_PARAMETER_MIX;
2721 }
2722
2723 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2724 if (!NT_STATUS_IS_OK(status)) {
2725 TALLOC_FREE(iov);
2726 TALLOC_FREE(first_state->smb1.chained_requests);
2727 return status;
2728 }
2729
2730 return NT_STATUS_OK;
2731 }
2732
2733 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2734 {
2735 return ((tevent_queue_length(conn->outgoing) != 0)
2736 || (talloc_array_length(conn->pending) != 0));
2737 }
2738
2739 bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn)
2740 {
2741 if (conn->protocol >= PROTOCOL_SMB2_02) {
2742 return (smb2cli_conn_server_capabilities(conn) & SMB2_CAP_DFS);
2743 }
2744
2745 return (smb1cli_conn_capabilities(conn) & CAP_DFS);
2746 }
2747
2748 bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
2749 {
2750 uint16_t credits = 1;
2751
2752 if (conn->smb2.cur_credits == 0) {
2753 if (max_dyn_len != NULL) {
2754 *max_dyn_len = 0;
2755 }
2756 return false;
2757 }
2758
2759 if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2760 credits = conn->smb2.cur_credits;
2761 }
2762
2763 if (max_dyn_len != NULL) {
2764 *max_dyn_len = credits * 65536;
2765 }
2766
2767 return true;
2768 }
2769
2770 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2771 {
2772 return conn->smb2.server.capabilities;
2773 }
2774
2775 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2776 {
2777 return conn->smb2.server.security_mode;
2778 }
2779
2780 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2781 {
2782 return conn->smb2.server.max_trans_size;
2783 }
2784
2785 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2786 {
2787 return conn->smb2.server.max_read_size;
2788 }
2789
2790 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2791 {
2792 return conn->smb2.server.max_write_size;
2793 }
2794
2795 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2796 uint16_t max_credits)
2797 {
2798 conn->smb2.max_credits = max_credits;
2799 }
2800
2801 uint16_t smb2cli_conn_get_cur_credits(struct smbXcli_conn *conn)
2802 {
2803 return conn->smb2.cur_credits;
2804 }
2805
2806 uint8_t smb2cli_conn_get_io_priority(struct smbXcli_conn *conn)
2807 {
2808 if (conn->protocol < PROTOCOL_SMB3_11) {
2809 return 0;
2810 }
2811
2812 return conn->smb2.io_priority;
2813 }
2814
2815 void smb2cli_conn_set_io_priority(struct smbXcli_conn *conn,
2816 uint8_t io_priority)
2817 {
2818 conn->smb2.io_priority = io_priority;
2819 }
2820
2821 uint32_t smb2cli_conn_cc_chunk_len(struct smbXcli_conn *conn)
2822 {
2823 return conn->smb2.cc_chunk_len;
2824 }
2825
2826 void smb2cli_conn_set_cc_chunk_len(struct smbXcli_conn *conn,
2827 uint32_t chunk_len)
2828 {
2829 conn->smb2.cc_chunk_len = chunk_len;
2830 }
2831
2832 uint32_t smb2cli_conn_cc_max_chunks(struct smbXcli_conn *conn)
2833 {
2834 return conn->smb2.cc_max_chunks;
2835 }
2836
2837 void smb2cli_conn_set_cc_max_chunks(struct smbXcli_conn *conn,
2838 uint32_t max_chunks)
2839 {
2840 conn->smb2.cc_max_chunks = max_chunks;
2841 }
2842
2843 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2844
2845 static bool smb2cli_req_cancel(struct tevent_req *req)
2846 {
2847 struct smbXcli_req_state *state =
2848 tevent_req_data(req,
2849 struct smbXcli_req_state);
2850 struct smbXcli_tcon *tcon = state->tcon;
2851 struct smbXcli_session *session = state->session;
2852 uint8_t *fixed = state->smb2.pad;
2853 uint16_t fixed_len = 4;
2854 struct tevent_req *subreq;
2855 struct smbXcli_req_state *substate;
2856 NTSTATUS status;
2857
2858 SSVAL(fixed, 0, 0x04);
2859 SSVAL(fixed, 2, 0);
2860
2861 subreq = smb2cli_req_create(state, state->ev,
2862 state->conn,
2863 SMB2_OP_CANCEL,
2864 0, 0, /* flags */
2865 0, /* timeout */
2866 tcon, session,
2867 fixed, fixed_len,
2868 NULL, 0, 0);
2869 if (subreq == NULL) {
2870 return false;
2871 }
2872 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2873
2874 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, state->smb2.cancel_flags);
2875 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, state->smb2.cancel_mid);
2876 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, state->smb2.cancel_aid);
2877
2878 status = smb2cli_req_compound_submit(&subreq, 1);
2879 if (!NT_STATUS_IS_OK(status)) {
2880 TALLOC_FREE(subreq);
2881 return false;
2882 }
2883
2884 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2885
2886 return true;
2887 }
2888
2889 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2890 {
2891 /* we do not care about the result */
2892 TALLOC_FREE(subreq);
2893 }
2894
2895 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2896 struct tevent_context *ev,
2897 struct smbXcli_conn *conn,
2898 uint16_t cmd,
2899 uint32_t additional_flags,
2900 uint32_t clear_flags,
2901 uint32_t timeout_msec,
2902 struct smbXcli_tcon *tcon,
2903 struct smbXcli_session *session,
2904 const uint8_t *fixed,
2905 uint16_t fixed_len,
2906 const uint8_t *dyn,
2907 uint32_t dyn_len,
2908 uint32_t max_dyn_len)
2909 {
2910 struct tevent_req *req;
2911 struct smbXcli_req_state *state;
2912 uint32_t flags = 0;
2913 uint32_t tid = 0;
2914 uint64_t uid = 0;
2915 bool use_channel_sequence = conn->smb2.force_channel_sequence;
2916 uint16_t channel_sequence = 0;
2917 bool use_replay_flag = false;
2918
2919 req = tevent_req_create(mem_ctx, &state,
2920 struct smbXcli_req_state);
2921 if (req == NULL) {
2922 return NULL;
2923 }
2924
2925 state->ev = ev;
2926 state->conn = conn;
2927 state->session = session;
2928 state->tcon = tcon;
2929
2930 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2931 use_channel_sequence = true;
2932 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2933 use_channel_sequence = true;
2934 }
2935
2936 if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_00) {
2937 use_replay_flag = true;
2938 }
2939
2940 if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_11) {
2941 flags |= SMB2_PRIORITY_VALUE_TO_MASK(conn->smb2.io_priority);
2942 }
2943
2944 if (session) {
2945 uid = session->smb2->session_id;
2946
2947 if (use_channel_sequence) {
2948 channel_sequence = session->smb2->channel_sequence;
2949 }
2950
2951 if (use_replay_flag && session->smb2->replay_active) {
2952 additional_flags |= SMB2_HDR_FLAG_REPLAY_OPERATION;
2953 }
2954
2955 state->smb2.should_sign = session->smb2->should_sign;
2956 state->smb2.should_encrypt = session->smb2->should_encrypt;
2957
2958 if (cmd == SMB2_OP_SESSSETUP &&
2959 session->smb2_channel.signing_key.length == 0 &&
2960 session->smb2->signing_key.length != 0)
2961 {
2962 /*
2963 * a session bind needs to be signed
2964 */
2965 state->smb2.should_sign = true;
2966 }
2967
2968 if (cmd == SMB2_OP_SESSSETUP &&
2969 session->smb2_channel.signing_key.length == 0) {
2970 state->smb2.should_encrypt = false;
2971 }
2972
2973 if (additional_flags & SMB2_HDR_FLAG_SIGNED) {
2974 if (session->smb2_channel.signing_key.length == 0) {
2975 tevent_req_nterror(req, NT_STATUS_NO_USER_SESSION_KEY);
2976 return req;
2977 }
2978
2979 additional_flags &= ~SMB2_HDR_FLAG_SIGNED;
2980 state->smb2.should_sign = true;
2981 }
2982 }
2983
2984 if (tcon) {
2985 tid = tcon->smb2.tcon_id;
2986
2987 if (tcon->smb2.should_sign) {
2988 state->smb2.should_sign = true;
2989 }
2990 if (tcon->smb2.should_encrypt) {
2991 state->smb2.should_encrypt = true;
2992 }
2993 }
2994
2995 if (state->smb2.should_encrypt) {
2996 state->smb2.should_sign = false;
2997 }
2998
2999 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
3000 if (state->smb2.recv_iov == NULL) {
3001 TALLOC_FREE(req);
3002 return NULL;
3003 }
3004
3005 flags |= additional_flags;
3006 flags &= ~clear_flags;
3007
3008 state->smb2.fixed = fixed;
3009 state->smb2.fixed_len = fixed_len;
3010 state->smb2.dyn = dyn;
3011 state->smb2.dyn_len = dyn_len;
3012 state->smb2.max_dyn_len = max_dyn_len;
3013
3014 if (state->smb2.should_encrypt) {
3015 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
3016 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
3017 }
3018
3019 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
3020 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
3021 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
3022 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
3023 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
3024 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
3025 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
3026 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
3027
3028 switch (cmd) {
3029 case SMB2_OP_CANCEL:
3030 state->one_way = true;
3031 break;
3032 case SMB2_OP_BREAK:
3033 /*
3034 * If this is a dummy request, it will have
3035 * UINT64_MAX as message id.
3036 * If we send on break acknowledgement,
3037 * this gets overwritten later.
3038 */
3039 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
3040 break;
3041 }
3042
3043 if (timeout_msec > 0) {
3044 struct timeval endtime;
3045
3046 endtime = timeval_current_ofs_msec(timeout_msec);
3047 if (!tevent_req_set_endtime(req, ev, endtime)) {
3048 return req;
3049 }
3050 }
3051
3052 return req;
3053 }
3054
3055 void smb2cli_req_set_notify_async(struct tevent_req *req)
3056 {
3057 struct smbXcli_req_state *state =
3058 tevent_req_data(req,
3059 struct smbXcli_req_state);
3060
3061 state->smb2.notify_async = true;
3062 }
3063
3064 static void smb2cli_req_writev_done(struct tevent_req *subreq);
3065 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3066 TALLOC_CTX *tmp_mem,
3067 uint8_t *inbuf);
3068
3069 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
3070 int num_reqs)
3071 {
3072 struct smbXcli_req_state *state;
3073 struct tevent_req *subreq;
3074 struct iovec *iov;
3075 int i, num_iov, nbt_len;
3076 int tf_iov = -1;
3077 const DATA_BLOB *encryption_key = NULL;
3078 uint64_t encryption_session_id = 0;
3079 uint64_t nonce_high = UINT64_MAX;
3080 uint64_t nonce_low = UINT64_MAX;
3081
3082 /*
3083 * 1 for the nbt length, optional TRANSFORM
3084 * per request: HDR, fixed, dyn, padding
3085 * -1 because the last one does not need padding
3086 */
3087
3088 iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
3089 if (iov == NULL) {
3090 return NT_STATUS_NO_MEMORY;
3091 }
3092
3093 num_iov = 1;
3094 nbt_len = 0;
3095
3096 /*
3097 * the session of the first request that requires encryption
3098 * specifies the encryption key.
3099 */
3100 for (i=0; i<num_reqs; i++) {
3101 if (!tevent_req_is_in_progress(reqs[i])) {
3102 return NT_STATUS_INTERNAL_ERROR;
3103 }
3104
3105 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
3106
3107 if (!smbXcli_conn_is_connected(state->conn)) {
3108 return NT_STATUS_CONNECTION_DISCONNECTED;
3109 }
3110
3111 if ((state->conn->protocol != PROTOCOL_NONE) &&
3112 (state->conn->protocol < PROTOCOL_SMB2_02)) {
3113 return NT_STATUS_REVISION_MISMATCH;
3114 }
3115
3116 if (state->session == NULL) {
3117 continue;
3118 }
3119
3120 if (!state->smb2.should_encrypt) {
3121 continue;
3122 }
3123
3124 encryption_key = &state->session->smb2->encryption_key;
3125 if (encryption_key->length == 0) {
3126 return NT_STATUS_INVALID_PARAMETER_MIX;
3127 }
3128
3129 encryption_session_id = state->session->smb2->session_id;
3130
3131 state->session->smb2->nonce_low += 1;
3132 if (state->session->smb2->nonce_low == 0) {
3133 state->session->smb2->nonce_high += 1;
3134 state->session->smb2->nonce_low += 1;
3135 }
3136
3137 /*
3138 * CCM and GCM algorithms must never have their
3139 * nonce wrap, or the security of the whole
3140 * communication and the keys is destroyed.
3141 * We must drop the connection once we have
3142 * transfered too much data.
3143 *
3144 * NOTE: We assume nonces greater than 8 bytes.
3145 */
3146 if (state->session->smb2->nonce_high >=
3147 state->session->smb2->nonce_high_max)
3148 {
3149 return NT_STATUS_ENCRYPTION_FAILED;
3150 }
3151
3152 nonce_high = state->session->smb2->nonce_high_random;
3153 nonce_high += state->session->smb2->nonce_high;
3154 nonce_low = state->session->smb2->nonce_low;
3155
3156 tf_iov = num_iov;
3157 iov[num_iov].iov_base = state->smb2.transform;
3158 iov[num_iov].iov_len = sizeof(state->smb2.transform);
3159 num_iov += 1;
3160
3161 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
3162 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
3163 nonce_low);
3164 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
3165 nonce_high);
3166 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
3167 encryption_session_id);
3168
3169 nbt_len += SMB2_TF_HDR_SIZE;
3170 break;
3171 }
3172
3173 for (i=0; i<num_reqs; i++) {
3174 int hdr_iov;
3175 size_t reqlen;
3176 bool ret;
3177 uint16_t opcode;
3178 uint64_t avail;
3179 uint16_t charge;
3180 uint16_t credits;
3181 uint64_t mid;
3182 const DATA_BLOB *signing_key = NULL;
3183
3184 if (!tevent_req_is_in_progress(reqs[i])) {
3185 return NT_STATUS_INTERNAL_ERROR;
3186 }
3187
3188 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
3189
3190 if (!smbXcli_conn_is_connected(state->conn)) {
3191 return NT_STATUS_CONNECTION_DISCONNECTED;
3192 }
3193
3194 if ((state->conn->protocol != PROTOCOL_NONE) &&
3195 (state->conn->protocol < PROTOCOL_SMB2_02)) {
3196 return NT_STATUS_REVISION_MISMATCH;
3197 }
3198
3199 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3200 if (opcode == SMB2_OP_CANCEL) {
3201 goto skip_credits;
3202 }
3203
3204 avail = UINT64_MAX - state->conn->smb2.mid;
3205 if (avail < 1) {
3206 return NT_STATUS_CONNECTION_ABORTED;
3207 }
3208
3209 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
3210 uint32_t max_dyn_len = 1;
3211
3212 max_dyn_len = MAX(max_dyn_len, state->smb2.dyn_len);
3213 max_dyn_len = MAX(max_dyn_len, state->smb2.max_dyn_len);
3214
3215 charge = (max_dyn_len - 1)/ 65536 + 1;
3216 } else {
3217 charge = 1;
3218 }
3219
3220 charge = MAX(state->smb2.credit_charge, charge);
3221
3222 avail = MIN(avail, state->conn->smb2.cur_credits);
3223 if (avail < charge) {
3224 return NT_STATUS_INTERNAL_ERROR;
3225 }
3226
3227 credits = 0;
3228 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
3229 credits = state->conn->smb2.max_credits -
3230 state->conn->smb2.cur_credits;
3231 }
3232 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
3233 credits += 1;
3234 }
3235
3236 mid = state->conn->smb2.mid;
3237 state->conn->smb2.mid += charge;
3238 state->conn->smb2.cur_credits -= charge;
3239
3240 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
3241 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
3242 }
3243 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
3244 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
3245
3246 state->smb2.cancel_flags = 0;
3247 state->smb2.cancel_mid = mid;
3248 state->smb2.cancel_aid = 0;
3249
3250 skip_credits:
3251 if (state->session && encryption_key == NULL) {
3252 /*
3253 * We prefer the channel signing key if it is
3254 * already there.
3255 */
3256 if (state->smb2.should_sign) {
3257 signing_key = &state->session->smb2_channel.signing_key;
3258 }
3259
3260 /*
3261 * If it is a channel binding, we already have the main
3262 * signing key and try that one.
3263 */
3264 if (signing_key && signing_key->length == 0) {
3265 signing_key = &state->session->smb2->signing_key;
3266 }
3267
3268 /*
3269 * If we do not have any session key yet, we skip the
3270 * signing of SMB2_OP_SESSSETUP requests.
3271 */
3272 if (signing_key && signing_key->length == 0) {
3273 signing_key = NULL;
3274 }
3275 }
3276
3277 hdr_iov = num_iov;
3278 iov[num_iov].iov_base = state->smb2.hdr;
3279 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
3280 num_iov += 1;
3281
3282 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
3283 iov[num_iov].iov_len = state->smb2.fixed_len;
3284 num_iov += 1;
3285
3286 if (state->smb2.dyn != NULL) {
3287 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
3288 iov[num_iov].iov_len = state->smb2.dyn_len;
3289 num_iov += 1;
3290 }
3291
3292 reqlen = sizeof(state->smb2.hdr);
3293 reqlen += state->smb2.fixed_len;
3294 reqlen += state->smb2.dyn_len;
3295
3296 if (i < num_reqs-1) {
3297 if ((reqlen % 8) > 0) {
3298 uint8_t pad = 8 - (reqlen % 8);
3299 iov[num_iov].iov_base = state->smb2.pad;
3300 iov[num_iov].iov_len = pad;
3301 num_iov += 1;
3302 reqlen += pad;
3303 }
3304 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
3305 }
3306
3307 state->smb2.encryption_session_id = encryption_session_id;
3308
3309 if (signing_key != NULL) {
3310 NTSTATUS status;
3311
3312 status = smb2_signing_sign_pdu(*signing_key,
3313 state->session->conn->protocol,
3314 &iov[hdr_iov], num_iov - hdr_iov);
3315 if (!NT_STATUS_IS_OK(status)) {
3316 return status;
3317 }
3318 }
3319
3320 nbt_len += reqlen;
3321
3322 ret = smbXcli_req_set_pending(reqs[i]);
3323 if (!ret) {
3324 return NT_STATUS_NO_MEMORY;
3325 }
3326 }
3327
3328 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
3329 _smb_setlen_tcp(state->length_hdr, nbt_len);
3330 iov[0].iov_base = state->length_hdr;
3331 iov[0].iov_len = sizeof(state->length_hdr);
3332
3333 if (encryption_key != NULL) {
3334 NTSTATUS status;
3335 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
3336 uint8_t *buf;
3337 int vi;
3338
3339 buf = talloc_array(iov, uint8_t, buflen);
3340 if (buf == NULL) {
3341 return NT_STATUS_NO_MEMORY;
3342 }
3343
3344 /*
3345 * We copy the buffers before encrypting them,
3346 * this is at least currently needed for the
3347 * to keep state->smb2.hdr.
3348 *
3349 * Also the callers may expect there buffers
3350 * to be const.
3351 */
3352 for (vi = tf_iov + 1; vi < num_iov; vi++) {
3353 struct iovec *v = &iov[vi];
3354 const uint8_t *o = (const uint8_t *)v->iov_base;
3355
3356 memcpy(buf, o, v->iov_len);
3357 v->iov_base = (void *)buf;
3358 buf += v->iov_len;
3359 }
3360
3361 status = smb2_signing_encrypt_pdu(*encryption_key,
3362 state->conn->smb2.server.cipher,
3363 &iov[tf_iov], num_iov - tf_iov);
3364 if (!NT_STATUS_IS_OK(status)) {
3365 return status;
3366 }
3367 }
3368
3369 if (state->conn->dispatch_incoming == NULL) {
3370 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3371 }
3372
3373 subreq = writev_send(state, state->ev, state->conn->outgoing,
3374 state->conn->sock_fd, false, iov, num_iov);
3375 if (subreq == NULL) {
3376 return NT_STATUS_NO_MEMORY;
3377 }
3378 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
3379 state->write_req = subreq;
3380
3381 return NT_STATUS_OK;
3382 }
3383
3384 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
3385 {
3386 struct smbXcli_req_state *state =
3387 tevent_req_data(req,
3388 struct smbXcli_req_state);
3389
3390 state->smb2.credit_charge = charge;
3391 }
3392
3393 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
3394 struct tevent_context *ev,
3395 struct smbXcli_conn *conn,
3396 uint16_t cmd,
3397 uint32_t additional_flags,
3398 uint32_t clear_flags,
3399 uint32_t timeout_msec,
3400 struct smbXcli_tcon *tcon,
3401 struct smbXcli_session *session,
3402 const uint8_t *fixed,
3403 uint16_t fixed_len,
3404 const uint8_t *dyn,
3405 uint32_t dyn_len,
3406 uint32_t max_dyn_len)
3407 {
3408 struct tevent_req *req;
3409 NTSTATUS status;
3410
3411 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
3412 additional_flags, clear_flags,
3413 timeout_msec,
3414 tcon, session,
3415 fixed, fixed_len,
3416 dyn, dyn_len,
3417 max_dyn_len);
3418 if (req == NULL) {
3419 return NULL;
3420 }
3421 if (!tevent_req_is_in_progress(req)) {
3422 return tevent_req_post(req, ev);
3423 }
3424 status = smb2cli_req_compound_submit(&req, 1);
3425 if (tevent_req_nterror(req, status)) {
3426 return tevent_req_post(req, ev);
3427 }
3428 return req;
3429 }
3430
3431 static void smb2cli_req_writev_done(struct tevent_req *subreq)
3432 {
3433 struct tevent_req *req =
3434 tevent_req_callback_data(subreq,
3435 struct tevent_req);
3436 struct smbXcli_req_state *state =
3437 tevent_req_data(req,
3438 struct smbXcli_req_state);
3439 ssize_t nwritten;
3440 int err;
3441
3442 state->write_req = NULL;
3443
3444 nwritten = writev_recv(subreq, &err);
3445 TALLOC_FREE(subreq);
3446 if (nwritten == -1) {
3447 /* here, we need to notify all pending requests */
3448 NTSTATUS status = map_nt_error_from_unix_common(err);
3449 smbXcli_conn_disconnect(state->conn, status);
3450 return;
3451 }
3452 }
3453
3454 static struct smbXcli_session* smbXcli_session_by_uid(struct smbXcli_conn *conn,
3455 uint64_t uid)
3456 {
3457 struct smbXcli_session *s = conn->sessions;
3458
3459 for (; s; s = s->next) {
3460 if (s->smb2->session_id != uid) {
3461 continue;
3462 }
3463 break;
3464 }
3465
3466 return s;
3467 }
3468
3469 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3470 uint8_t *buf,
3471 size_t buflen,
3472 TALLOC_CTX *mem_ctx,
3473 struct iovec **piov,
3474 size_t *pnum_iov)
3475 {
3476 struct iovec *iov;
3477 int num_iov = 0;
3478 size_t taken = 0;
3479 uint8_t *first_hdr = buf;
3480 size_t verified_buflen = 0;
3481 uint8_t *tf = NULL;
3482 size_t tf_len = 0;
3483
3484 iov = talloc_array(mem_ctx, struct iovec, num_iov);
3485 if (iov == NULL) {
3486 return NT_STATUS_NO_MEMORY;
3487 }
3488
3489 while (taken < buflen) {
3490 size_t len = buflen - taken;
3491 uint8_t *hdr = first_hdr + taken;
3492 struct iovec *cur;
3493 size_t full_size;
3494 size_t next_command_ofs;
3495 uint16_t body_size;
3496 struct iovec *iov_tmp;
3497
3498 if (verified_buflen > taken) {
3499 len = verified_buflen - taken;
3500 } else {
3501 tf = NULL;
3502 tf_len = 0;
3503 }
3504
3505 if (len < 4) {
3506 DEBUG(10, ("%d bytes left, expected at least %d\n",
3507 (int)len, 4));
3508 goto inval;
3509 }
3510 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3511 struct smbXcli_session *s;
3512 uint64_t uid;
3513 struct iovec tf_iov[2];
3514 size_t enc_len;
3515 NTSTATUS status;
3516
3517 if (len < SMB2_TF_HDR_SIZE) {
3518 DEBUG(10, ("%d bytes left, expected at least %d\n",
3519 (int)len, SMB2_TF_HDR_SIZE));
3520 goto inval;
3521 }
3522 tf = hdr;
3523 tf_len = SMB2_TF_HDR_SIZE;
3524 taken += tf_len;
3525
3526 hdr = first_hdr + taken;
3527 enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3528 uid = BVAL(tf, SMB2_TF_SESSION_ID);
3529
3530 if (len < SMB2_TF_HDR_SIZE + enc_len) {
3531 DEBUG(10, ("%d bytes left, expected at least %d\n",
3532 (int)len,
3533 (int)(SMB2_TF_HDR_SIZE + enc_len)));
3534 goto inval;
3535 }
3536
3537 s = smbXcli_session_by_uid(conn, uid);
3538 if (s == NULL) {
3539 DEBUG(10, ("unknown session_id %llu\n",
3540 (unsigned long long)uid));
3541 goto inval;
3542 }
3543
3544 tf_iov[0].iov_base = (void *)tf;
3545 tf_iov[0].iov_len = tf_len;
3546 tf_iov[1].iov_base = (void *)hdr;
3547 tf_iov[1].iov_len = enc_len;
3548
3549 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3550 conn->smb2.server.cipher,
3551 tf_iov, 2);
3552 if (!NT_STATUS_IS_OK(status)) {
3553 TALLOC_FREE(iov);
3554 return status;
3555 }
3556
3557 verified_buflen = taken + enc_len;
3558 len = enc_len;
3559 }
3560
3561 /*
3562 * We need the header plus the body length field
3563 */
3564
3565 if (len < SMB2_HDR_BODY + 2) {
3566 DEBUG(10, ("%d bytes left, expected at least %d\n",
3567 (int)len, SMB2_HDR_BODY));
3568 goto inval;
3569 }
3570 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3571 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3572 IVAL(hdr, 0)));
3573 goto inval;
3574 }
3575 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3576 DEBUG(10, ("Got HDR len %d, expected %d\n",
3577 SVAL(hdr, 4), SMB2_HDR_BODY));
3578 goto inval;
3579 }
3580
3581 full_size = len;
3582 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3583 body_size = SVAL(hdr, SMB2_HDR_BODY);
3584
3585 if (next_command_ofs != 0) {
3586 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3587 goto inval;
3588 }
3589 if (next_command_ofs > full_size) {
3590 goto inval;
3591 }
3592 full_size = next_command_ofs;
3593 }
3594 if (body_size < 2) {
3595 goto inval;
3596 }
3597 body_size &= 0xfffe;
3598
3599 if (body_size > (full_size - SMB2_HDR_BODY)) {
3600 goto inval;
3601 }
3602
3603 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3604 num_iov + 4);
3605 if (iov_tmp == NULL) {
3606 TALLOC_FREE(iov);
3607 return NT_STATUS_NO_MEMORY;
3608 }
3609 iov = iov_tmp;
3610 cur = &iov[num_iov];
3611 num_iov += 4;
3612
3613 cur[0].iov_base = tf;
3614 cur[0].iov_len = tf_len;
3615 cur[1].iov_base = hdr;
3616 cur[1].iov_len = SMB2_HDR_BODY;
3617 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3618 cur[2].iov_len = body_size;
3619 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3620 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3621
3622 taken += full_size;
3623 }
3624
3625 *piov = iov;
3626 *pnum_iov = num_iov;
3627 return NT_STATUS_OK;
3628
3629 inval:
3630 TALLOC_FREE(iov);
3631 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3632 }
3633
3634 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3635 uint64_t mid)
3636 {
3637 size_t num_pending = talloc_array_length(conn->pending);
3638 size_t i;
3639
3640 for (i=0; i<num_pending; i++) {
3641 struct tevent_req *req = conn->pending[i];
3642 struct smbXcli_req_state *state =
3643 tevent_req_data(req,
3644 struct smbXcli_req_state);
3645
3646 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3647 return req;
3648 }
3649 }
3650 return NULL;
3651 }
3652
3653 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3654 TALLOC_CTX *tmp_mem,
3655 uint8_t *inbuf)
3656 {
3657 struct tevent_req *req;
3658 struct smbXcli_req_state *state = NULL;
3659 struct iovec *iov = NULL;
3660 size_t i, num_iov = 0;
3661 NTSTATUS status;
3662 bool defer = true;
3663 struct smbXcli_session *last_session = NULL;
3664 size_t inbuf_len = smb_len_tcp(inbuf);
3665
3666 status = smb2cli_inbuf_parse_compound(conn,
3667 inbuf + NBT_HDR_SIZE,
3668 inbuf_len,
3669 tmp_mem,
3670 &iov, &num_iov);
3671 if (!NT_STATUS_IS_OK(status)) {
3672 return status;
3673 }
3674
3675 for (i=0; i<num_iov; i+=4) {
3676 uint8_t *inbuf_ref = NULL;
3677 struct iovec *cur = &iov[i];
3678 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3679 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3680 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3681 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3682 uint16_t req_opcode;
3683 uint32_t req_flags;
3684 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3685 uint32_t new_credits;
3686 struct smbXcli_session *session = NULL;
3687 const DATA_BLOB *signing_key = NULL;
3688 bool was_encrypted = false;
3689
3690 new_credits = conn->smb2.cur_credits;
3691 new_credits += credits;
3692 if (new_credits > UINT16_MAX) {
3693 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3694 }
3695 conn->smb2.cur_credits += credits;
3696
3697 req = smb2cli_conn_find_pending(conn, mid);
3698 if (req == NULL) {
3699 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3700 }
3701 state = tevent_req_data(req, struct smbXcli_req_state);
3702
3703 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3704 if (opcode != req_opcode) {
3705 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3706 }
3707 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3708
3709 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3710 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3711 }
3712
3713 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3714 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3715 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3716 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3717
3718 if (state->smb2.got_async) {
3719 /* We only expect one STATUS_PENDING response */
3720 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3721 }
3722 state->smb2.got_async = true;
3723
3724 /*
3725 * async interim responses are not signed,
3726 * even if the SMB2_HDR_FLAG_SIGNED flag
3727 * is set.
3728 */
3729 state->smb2.cancel_flags = SMB2_HDR_FLAG_ASYNC;
3730 state->smb2.cancel_mid = 0;
3731 state->smb2.cancel_aid = async_id;
3732
3733 if (state->smb2.notify_async) {
3734 tevent_req_defer_callback(req, state->ev);
3735 tevent_req_notify_callback(req);
3736 }
3737 continue;
3738 }
3739
3740 session = state->session;
3741 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3742 session = last_session;
3743 }
3744 last_session = session;
3745
3746 if (state->smb2.should_sign) {
3747 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3748 return NT_STATUS_ACCESS_DENIED;
3749 }
3750 }
3751
3752 if (flags & SMB2_HDR_FLAG_SIGNED) {
3753 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3754
3755 if (session == NULL) {
3756 session = smbXcli_session_by_uid(state->conn,
3757 uid);
3758 }
3759
3760 if (session == NULL) {
3761 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3762 }
3763
3764 last_session = session;
3765 signing_key = &session->smb2_channel.signing_key;
3766 }
3767
3768 if (opcode == SMB2_OP_SESSSETUP) {
3769 /*
3770 * We prefer the channel signing key, if it is
3771 * already there.
3772 *
3773 * If we do not have a channel signing key yet,
3774 * we try the main signing key, if it is not
3775 * the final response.
3776 */
3777 if (signing_key && signing_key->length == 0 &&
3778 !NT_STATUS_IS_OK(status)) {
3779 signing_key = &session->smb2->signing_key;
3780 }
3781
3782 if (signing_key && signing_key->length == 0) {
3783 /*
3784 * If we do not have a session key to
3785 * verify the signature, we defer the
3786 * signing check to the caller.
3787 *
3788 * The caller gets NT_STATUS_OK, it
3789 * has to call
3790 * smb2cli_session_set_session_key()
3791 * or
3792 * smb2cli_session_set_channel_key()
3793 * which will check the signature
3794 * with the channel signing key.
3795 */
3796 signing_key = NULL;
3797 }
3798 }
3799
3800 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3801 const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3802 uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3803
3804 /*
3805 * If the response was encrypted in a SMB2_TRANSFORM
3806 * pdu, which belongs to the correct session,
3807 * we do not need to do signing checks
3808 *
3809 * It could be the session the response belongs to
3810 * or the session that was used to encrypt the
3811 * SMB2_TRANSFORM request.
3812 */
3813 if ((session && session->smb2->session_id == uid) ||
3814 (state->smb2.encryption_session_id == uid)) {
3815 signing_key = NULL;
3816 was_encrypted = true;
3817 }
3818 }
3819
3820 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3821 /*
3822 * if the server returns NT_STATUS_USER_SESSION_DELETED
3823 * the response is not signed and we should
3824 * propagate the NT_STATUS_USER_SESSION_DELETED
3825 * status to the caller.
3826 */
3827 state->smb2.signing_skipped = true;
3828 signing_key = NULL;
3829 }
3830
3831 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3832 /*
3833 * if the server returns
3834 * NT_STATUS_INVALID_PARAMETER
3835 * the response might not be encrypted.
3836 */
3837 if (state->smb2.should_encrypt && !was_encrypted) {
3838 state->smb2.signing_skipped = true;
3839 signing_key = NULL;
3840 }
3841 }
3842
3843 if (state->smb2.should_encrypt && !was_encrypted) {
3844 if (!state->smb2.signing_skipped) {
3845 return NT_STATUS_ACCESS_DENIED;
3846 }
3847 }
3848
3849 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3850 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3851 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3852 /*
3853 * if the server returns
3854 * NT_STATUS_NETWORK_NAME_DELETED
3855 * NT_STATUS_FILE_CLOSED
3856 * NT_STATUS_INVALID_PARAMETER
3857 * the response might not be signed
3858 * as this happens before the signing checks.
3859 *
3860 * If server echos the signature (or all zeros)
3861 * we should report the status from the server
3862 * to the caller.
3863 */
3864 if (signing_key) {
3865 int cmp;
3866
3867 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3868 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3869 16);
3870 if (cmp == 0) {
3871 state->smb2.signing_skipped = true;
3872 signing_key = NULL;
3873 }
3874 }
3875 if (signing_key) {
3876 bool zero;
3877 zero = all_zero(inhdr+SMB2_HDR_SIGNATURE, 16);
3878 if (zero) {
3879 state->smb2.signing_skipped = true;
3880 signing_key = NULL;
3881 }
3882 }
3883 }
3884
3885 if (signing_key) {
3886 status = smb2_signing_check_pdu(*signing_key,
3887 state->conn->protocol,
3888 &cur[1], 3);
3889 if (!NT_STATUS_IS_OK(status)) {
3890 /*
3891 * If the signing check fails, we disconnect
3892 * the connection.
3893 */
3894 return status;
3895 }
3896 }
3897
3898 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
3899 (session != NULL) && session->disconnect_expired)
3900 {
3901 /*
3902 * this should be a short term hack
3903 * until the upper layers have implemented
3904 * re-authentication.
3905 */
3906 return status;
3907 }
3908
3909 smbXcli_req_unset_pending(req);
3910
3911 /*
3912 * There might be more than one response
3913 * we need to defer the notifications
3914 */
3915 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3916 defer = false;
3917 }
3918
3919 if (defer) {
3920 tevent_req_defer_callback(req, state->ev);
3921 }
3922
3923 /*
3924 * Note: here we use talloc_reference() in a way
3925 * that does not expose it to the caller.
3926 */
3927 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3928 if (tevent_req_nomem(inbuf_ref, req)) {
3929 continue;
3930 }
3931
3932 /* copy the related buffers */
3933 state->smb2.recv_iov[0] = cur[1];
3934 state->smb2.recv_iov[1] = cur[2];
3935 state->smb2.recv_iov[2] = cur[3];
3936
3937 tevent_req_done(req);
3938 }
3939
3940 if (defer) {
3941 return NT_STATUS_RETRY;
3942 }
3943
3944 return NT_STATUS_OK;
3945 }
3946
3947 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3948 struct iovec **piov,
3949 const struct smb2cli_req_expected_response *expected,
3950 size_t num_expected)
3951 {
3952 struct smbXcli_req_state *state =
3953 tevent_req_data(req,
3954 struct smbXcli_req_state);
3955 NTSTATUS status;
3956 size_t body_size;
3957 bool found_status = false;
3958 bool found_size = false;
3959 size_t i;
3960
3961 if (piov != NULL) {
3962 *piov = NULL;
3963 }
3964
3965 if (tevent_req_is_in_progress(req) && state->smb2.got_async) {
3966 return STATUS_PENDING;
3967 }
3968
3969 if (tevent_req_is_nterror(req, &status)) {
3970 for (i=0; i < num_expected; i++) {
3971 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3972 found_status = true;
3973 break;
3974 }
3975 }
3976
3977 if (found_status) {
3978 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3979 }
3980
3981 return status;
3982 }
3983
3984 if (num_expected == 0) {
3985 found_status = true;
3986 found_size = true;
3987 }
3988
3989 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3990 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3991
3992 for (i=0; i < num_expected; i++) {
3993 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3994 continue;
3995 }
3996
3997 found_status = true;
3998 if (expected[i].body_size == 0) {
3999 found_size = true;
4000 break;
4001 }
4002
4003 if (expected[i].body_size == body_size) {
4004 found_size = true;
4005 break;
4006 }
4007 }
4008
4009 if (!found_status) {
4010 return status;
4011 }
4012
4013 if (state->smb2.signing_skipped) {
4014 if (num_expected > 0) {
4015 return NT_STATUS_ACCESS_DENIED;
4016 }
4017 if (!NT_STATUS_IS_ERR(status)) {
4018 return NT_STATUS_ACCESS_DENIED;
4019 }
4020 }
4021
4022 if (!found_size) {
4023 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4024 }
4025
4026 if (piov != NULL) {
4027 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
4028 }
4029
4030 return status;
4031 }
4032
4033 NTSTATUS smb2cli_req_get_sent_iov(struct tevent_req *req,
4034 struct iovec *sent_iov)
4035 {
4036 struct smbXcli_req_state *state =
4037 tevent_req_data(req,
4038 struct smbXcli_req_state);
4039
4040 if (tevent_req_is_in_progress(req)) {
4041 return STATUS_PENDING;
4042 }
4043
4044 sent_iov[0].iov_base = state->smb2.hdr;
4045 sent_iov[0].iov_len = sizeof(state->smb2.hdr);
4046
4047 sent_iov[1].iov_base = discard_const(state->smb2.fixed);
4048 sent_iov[1].iov_len = state->smb2.fixed_len;
4049
4050 if (state->smb2.dyn != NULL) {
4051 sent_iov[2].iov_base = discard_const(state->smb2.dyn);
4052 sent_iov[2].iov_len = state->smb2.dyn_len;
4053 } else {
4054 sent_iov[2].iov_base = NULL;
4055 sent_iov[2].iov_len = 0;
4056 }
4057
4058 return NT_STATUS_OK;
4059 }
4060
4061 static const struct {
4062 enum protocol_types proto;
4063 const char *smb1_name;
4064 } smb1cli_prots[] = {
4065 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
4066 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
4067 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
4068 {PROTOCOL_LANMAN1, "LANMAN1.0"},
4069 {PROTOCOL_LANMAN2, "LM1.2X002"},
4070 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
4071 {PROTOCOL_LANMAN2, "LANMAN2.1"},
4072 {PROTOCOL_LANMAN2, "Samba"},
4073 {PROTOCOL_NT1, "NT LANMAN 1.0"},
4074 {PROTOCOL_NT1, "NT LM 0.12"},
4075 {PROTOCOL_SMB2_02, "SMB 2.002"},
4076 {PROTOCOL_SMB2_10, "SMB 2.???"},
4077 };
4078
4079 static const struct {
4080 enum protocol_types proto;
4081 uint16_t smb2_dialect;
4082 } smb2cli_prots[] = {
4083 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
4084 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
4085 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
4086 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
4087 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
4088 {PROTOCOL_SMB3_02, SMB3_DIALECT_REVISION_302},
4089 {PROTOCOL_SMB3_10, SMB3_DIALECT_REVISION_310},
4090 {PROTOCOL_SMB3_11, SMB3_DIALECT_REVISION_311},
4091 };
4092
4093 struct smbXcli_negprot_state {
4094 struct smbXcli_conn *conn;
4095 struct tevent_context *ev;
4096 uint32_t timeout_msec;
4097
4098 struct {
4099 uint8_t fixed[36];
4100 } smb2;
4101 };
4102
4103 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
4104 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
4105 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
4106 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
4107 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
4108 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4109 TALLOC_CTX *frame,
4110 uint8_t *inbuf);
4111
4112 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
4113 struct tevent_context *ev,
4114 struct smbXcli_conn *conn,
4115 uint32_t timeout_msec,
4116 enum protocol_types min_protocol,
4117 enum protocol_types max_protocol,
4118 uint16_t max_credits)
4119 {
4120 struct tevent_req *req, *subreq;
4121 struct smbXcli_negprot_state *state;
4122
4123 req = tevent_req_create(mem_ctx, &state,
4124 struct smbXcli_negprot_state);
4125 if (req == NULL) {
4126 return NULL;
4127 }
4128 state->conn = conn;
4129 state->ev = ev;
4130 state->timeout_msec = timeout_msec;
4131
4132 if (min_protocol == PROTOCOL_NONE) {
4133 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
4134 return tevent_req_post(req, ev);
4135 }
4136
4137 if (max_protocol == PROTOCOL_NONE) {
4138 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
4139 return tevent_req_post(req, ev);
4140 }
4141
4142 if (min_protocol > max_protocol) {
4143 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
4144 return tevent_req_post(req, ev);
4145 }
4146
4147 conn->min_protocol = min_protocol;
4148 conn->max_protocol = max_protocol;
4149 conn->protocol = PROTOCOL_NONE;
4150
4151 if (max_protocol >= PROTOCOL_SMB2_02) {
4152 conn->smb2.max_credits = max_credits;
4153 }
4154
4155 if ((min_protocol < PROTOCOL_SMB2_02) &&
4156 (max_protocol < PROTOCOL_SMB2_02)) {
4157 /*
4158 * SMB1 only...
4159 */
4160 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4161
4162 subreq = smbXcli_negprot_smb1_subreq(state);
4163 if (tevent_req_nomem(subreq, req)) {
4164 return tevent_req_post(req, ev);
4165 }
4166 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4167 return req;
4168 }
4169
4170 if ((min_protocol >= PROTOCOL_SMB2_02) &&
4171 (max_protocol >= PROTOCOL_SMB2_02)) {
4172 /*
4173 * SMB2 only...
4174 */
4175 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4176
4177 subreq = smbXcli_negprot_smb2_subreq(state);
4178 if (tevent_req_nomem(subreq, req)) {
4179 return tevent_req_post(req, ev);
4180 }
4181 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4182 return req;
4183 }
4184
4185 /*
4186 * We send an SMB1 negprot with the SMB2 dialects
4187 * and expect a SMB1 or a SMB2 response.
4188 *
4189 * smbXcli_negprot_dispatch_incoming() will fix the
4190 * callback to match protocol of the response.
4191 */
4192 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
4193
4194 subreq = smbXcli_negprot_smb1_subreq(state);
4195 if (tevent_req_nomem(subreq, req)) {
4196 return tevent_req_post(req, ev);
4197 }
4198 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
4199 return req;
4200 }
4201
4202 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
4203 {
4204 struct tevent_req *req =
4205 tevent_req_callback_data(subreq,
4206 struct tevent_req);
4207 NTSTATUS status;
4208
4209 /*
4210 * we just want the low level error
4211 */
4212 status = tevent_req_simple_recv_ntstatus(subreq);
4213 TALLOC_FREE(subreq);
4214 if (tevent_req_nterror(req, status)) {
4215 return;
4216 }
4217
4218 /* this should never happen */
4219 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
4220 }
4221
4222 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
4223 {
4224 size_t i;
4225 DATA_BLOB bytes = data_blob_null;
4226 uint8_t flags;
4227 uint16_t flags2;
4228
4229 /* setup the protocol strings */
4230 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4231 uint8_t c = 2;
4232 bool ok;
4233
4234 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4235 continue;
4236 }
4237
4238 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4239 continue;
4240 }
4241
4242 ok = data_blob_append(state, &bytes, &c, sizeof(c));
4243 if (!ok) {
4244 return NULL;
4245 }
4246
4247 /*
4248 * We now it is already ascii and
4249 * we want NULL termination.
4250 */
4251 ok = data_blob_append(state, &bytes,
4252 smb1cli_prots[i].smb1_name,
4253 strlen(smb1cli_prots[i].smb1_name)+1);
4254 if (!ok) {
4255 return NULL;
4256 }
4257 }
4258
4259 smb1cli_req_flags(state->conn->max_protocol,
4260 state->conn->smb1.client.capabilities,
4261 SMBnegprot,
4262 0, 0, &flags,
4263 0, 0, &flags2);
4264
4265 return smb1cli_req_send(state, state->ev, state->conn,
4266 SMBnegprot,
4267 flags, ~flags,
4268 flags2, ~flags2,
4269 state->timeout_msec,
4270 0xFFFE, 0, NULL, /* pid, tid, session */
4271 0, NULL, /* wct, vwv */
4272 bytes.length, bytes.data);
4273 }
4274
4275 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
4276 {
4277 struct tevent_req *req =
4278 tevent_req_callback_data(subreq,
4279 struct tevent_req);
4280 struct smbXcli_negprot_state *state =
4281 tevent_req_data(req,
4282 struct smbXcli_negprot_state);
4283 struct smbXcli_conn *conn = state->conn;
4284 struct iovec *recv_iov = NULL;
4285 uint8_t *inhdr;
4286 uint8_t wct;
4287 uint16_t *vwv;
4288 uint32_t num_bytes;
4289 uint8_t *bytes;
4290 NTSTATUS status;
4291 uint16_t protnum;
4292 size_t i;
4293 size_t num_prots = 0;
4294 uint8_t flags;
4295 uint32_t client_capabilities = conn->smb1.client.capabilities;
4296 uint32_t both_capabilities;
4297 uint32_t server_capabilities = 0;
4298 uint32_t capabilities;
4299 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
4300 uint32_t server_max_xmit = 0;
4301 uint32_t max_xmit;
4302 uint32_t server_max_mux = 0;
4303 uint16_t server_security_mode = 0;
4304 uint32_t server_session_key = 0;
4305 bool server_readbraw = false;
4306 bool server_writebraw = false;
4307 bool server_lockread = false;
4308 bool server_writeunlock = false;
4309 struct GUID server_guid = GUID_zero();
4310 DATA_BLOB server_gss_blob = data_blob_null;
4311 uint8_t server_challenge[8];
4312 char *server_workgroup = NULL;
4313 char *server_name = NULL;
4314 int server_time_zone = 0;
4315 NTTIME server_system_time = 0;
4316 static const struct smb1cli_req_expected_response expected[] = {
4317 {
4318 .status = NT_STATUS_OK,
4319 .wct = 0x11, /* NT1 */
4320 },
4321 {
4322 .status = NT_STATUS_OK,
4323 .wct = 0x0D, /* LM */
4324 },
4325 {
4326 .status = NT_STATUS_OK,
4327 .wct = 0x01, /* CORE */
4328 }
4329 };
4330
4331 ZERO_STRUCT(server_challenge);
4332
4333 status = smb1cli_req_recv(subreq, state,
4334 &recv_iov,
4335 &inhdr,
4336 &wct,
4337 &vwv,
4338 NULL, /* pvwv_offset */
4339 &num_bytes,
4340 &bytes,
4341 NULL, /* pbytes_offset */
4342 NULL, /* pinbuf */
4343 expected, ARRAY_SIZE(expected));
4344 TALLOC_FREE(subreq);
4345 if (tevent_req_nterror(req, status)) {
4346 return;
4347 }
4348
4349 flags = CVAL(inhdr, HDR_FLG);
4350
4351 protnum = SVAL(vwv, 0);
4352
4353 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4354 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4355 continue;
4356 }
4357
4358 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4359 continue;
4360 }
4361
4362 if (protnum != num_prots) {
4363 num_prots++;
4364 continue;
4365 }
4366
4367 conn->protocol = smb1cli_prots[i].proto;
4368 break;
4369 }
4370
4371 if (conn->protocol == PROTOCOL_NONE) {
4372 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4373 return;
4374 }
4375
4376 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
4377 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
4378 "and the selected protocol level doesn't support it.\n"));
4379 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4380 return;
4381 }
4382
4383 if (flags & FLAG_SUPPORT_LOCKREAD) {
4384 server_lockread = true;
4385 server_writeunlock = true;
4386 }
4387
4388 if (conn->protocol >= PROTOCOL_NT1) {
4389 const char *client_signing = NULL;
4390 bool server_mandatory = false;
4391 bool server_allowed = false;
4392 const char *server_signing = NULL;
4393 bool ok;
4394 uint8_t key_len;
4395
4396 if (wct != 0x11) {
4397 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4398 return;
4399 }
4400
4401 /* NT protocol */
4402 server_security_mode = CVAL(vwv + 1, 0);
4403 server_max_mux = SVAL(vwv + 1, 1);
4404 server_max_xmit = IVAL(vwv + 3, 1);
4405 server_session_key = IVAL(vwv + 7, 1);
4406 server_time_zone = SVALS(vwv + 15, 1);
4407 server_time_zone *= 60;
4408 /* this time arrives in real GMT */
4409 server_system_time = BVAL(vwv + 11, 1);
4410 server_capabilities = IVAL(vwv + 9, 1);
4411
4412 key_len = CVAL(vwv + 16, 1);
4413
4414 if (server_capabilities & CAP_RAW_MODE) {
4415 server_readbraw = true;
4416 server_writebraw = true;
4417 }
4418 if (server_capabilities & CAP_LOCK_AND_READ) {
4419 server_lockread = true;
4420 }
4421
4422 if (server_capabilities & CAP_EXTENDED_SECURITY) {
4423 DATA_BLOB blob1, blob2;
4424
4425 if (num_bytes < 16) {
4426 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4427 return;
4428 }
4429
4430 blob1 = data_blob_const(bytes, 16);
4431 status = GUID_from_data_blob(&blob1, &server_guid);
4432 if (tevent_req_nterror(req, status)) {
4433 return;
4434 }
4435
4436 blob1 = data_blob_const(bytes+16, num_bytes-16);
4437 blob2 = data_blob_dup_talloc(state, blob1);
4438 if (blob1.length > 0 &&
4439 tevent_req_nomem(blob2.data, req)) {
4440 return;
4441 }
4442 server_gss_blob = blob2;
4443 } else {
4444 DATA_BLOB blob1, blob2;
4445
4446 if (num_bytes < key_len) {
4447 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4448 return;
4449 }
4450
4451 if (key_len != 0 && key_len != 8) {
4452 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4453 return;
4454 }
4455
4456 if (key_len == 8) {
4457 memcpy(server_challenge, bytes, 8);
4458 }
4459
4460 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4461 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
4462 if (blob1.length > 0) {
4463 size_t len;
4464
4465 len = utf16_len_n(blob1.data,
4466 blob1.length);
4467 blob1.length = len;
4468
4469 ok = convert_string_talloc(state,
4470 CH_UTF16LE,
4471 CH_UNIX,
4472 blob1.data,
4473 blob1.length,
4474 &server_workgroup,
4475 &len);
4476 if (!ok) {
4477 status = map_nt_error_from_unix_common(errno);
4478 tevent_req_nterror(req, status);
4479 return;
4480 }
4481 }
4482
4483 blob2.data += blob1.length;
4484 blob2.length -= blob1.length;
4485 if (blob2.length > 0) {
4486 size_t len;
4487
4488 len = utf16_len_n(blob1.data,
4489 blob1.length);
4490 blob1.length = len;
4491
4492 ok = convert_string_talloc(state,
4493 CH_UTF16LE,
4494 CH_UNIX,
4495 blob2.data,
4496 blob2.length,
4497 &server_name,
4498 &len);
4499 if (!ok) {
4500 status = map_nt_error_from_unix_common(errno);
4501 tevent_req_nterror(req, status);
4502 return;
4503 }
4504 }
4505 }
4506
4507 client_signing = "disabled";
4508 if (conn->allow_signing) {
4509 client_signing = "allowed";
4510 }
4511 if (conn->mandatory_signing) {
4512 client_signing = "required";
4513 }
4514
4515 server_signing = "not supported";
4516 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4517 server_signing = "supported";
4518 server_allowed = true;
4519 } else if (conn->mandatory_signing) {
4520 /*
4521 * We have mandatory signing as client
4522 * lets assume the server will look at our
4523 * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4524 * flag in the session setup
4525 */
4526 server_signing = "not announced";
4527 server_allowed = true;
4528 }
4529 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4530 server_signing = "required";
4531 server_mandatory = true;
4532 }
4533
4534 ok = smb_signing_set_negotiated(conn->smb1.signing,
4535 server_allowed,
4536 server_mandatory);
4537 if (!ok) {
4538 DEBUG(1,("cli_negprot: SMB signing is required, "
4539 "but client[%s] and server[%s] mismatch\n",
4540 client_signing, server_signing));
4541 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4542 return;
4543 }
4544
4545 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4546 DATA_BLOB blob1;
4547 uint8_t key_len;
4548 time_t t;
4549
4550 if (wct != 0x0D) {
4551 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4552 return;
4553 }
4554
4555 server_security_mode = SVAL(vwv + 1, 0);
4556 server_max_xmit = SVAL(vwv + 2, 0);
4557 server_max_mux = SVAL(vwv + 3, 0);
4558 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4559 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4560 server_session_key = IVAL(vwv + 6, 0);
4561 server_time_zone = SVALS(vwv + 10, 0);
4562 server_time_zone *= 60;
4563 /* this time is converted to GMT by make_unix_date */
4564 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4565 unix_to_nt_time(&server_system_time, t);
4566 key_len = SVAL(vwv + 11, 0);
4567
4568 if (num_bytes < key_len) {
4569 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4570 return;
4571 }
4572
4573 if (key_len != 0 && key_len != 8) {
4574 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4575 return;
4576 }
4577
4578 if (key_len == 8) {
4579 memcpy(server_challenge, bytes, 8);
4580 }
4581
4582 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4583 if (blob1.length > 0) {
4584 size_t len;
4585 bool ok;
4586
4587 len = utf16_len_n(blob1.data,
4588 blob1.length);
4589 blob1.length = len;
4590
4591 ok = convert_string_talloc(state,
4592 CH_DOS,
4593 CH_UNIX,
4594 blob1.data,
4595 blob1.length,
4596 &server_workgroup,
4597 &len);
4598 if (!ok) {
4599 status = map_nt_error_from_unix_common(errno);
4600 tevent_req_nterror(req, status);
4601 return;
4602 }
4603 }
4604
4605 } else {
4606 /* the old core protocol */
4607 server_time_zone = get_time_zone(time(NULL));
4608 server_max_xmit = 1024;
4609 server_max_mux = 1;
4610 }
4611
4612 if (server_max_xmit < 1024) {
4613 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4614 return;
4615 }
4616
4617 if (server_max_mux < 1) {
4618 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4619 return;
4620 }
4621
4622 /*
4623 * Now calculate the negotiated capabilities
4624 * based on the mask for:
4625 * - client only flags
4626 * - flags used in both directions
4627 * - server only flags
4628 */
4629 both_capabilities = client_capabilities & server_capabilities;
4630 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4631 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4632 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4633
4634 max_xmit = MIN(client_max_xmit, server_max_xmit);
4635
4636 conn->smb1.server.capabilities = server_capabilities;
4637 conn->smb1.capabilities = capabilities;
4638
4639 conn->smb1.server.max_xmit = server_max_xmit;
4640 conn->smb1.max_xmit = max_xmit;
4641
4642 conn->smb1.server.max_mux = server_max_mux;
4643
4644 conn->smb1.server.security_mode = server_security_mode;
4645
4646 conn->smb1.server.readbraw = server_readbraw;
4647 conn->smb1.server.writebraw = server_writebraw;
4648 conn->smb1.server.lockread = server_lockread;
4649 conn->smb1.server.writeunlock = server_writeunlock;
4650
4651 conn->smb1.server.session_key = server_session_key;
4652
4653 talloc_steal(conn, server_gss_blob.data);
4654 conn->smb1.server.gss_blob = server_gss_blob;
4655 conn->smb1.server.guid = server_guid;
4656 memcpy(conn->smb1.server.challenge, server_challenge, 8);
4657 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4658 conn->smb1.server.name = talloc_move(conn, &server_name);
4659
4660 conn->smb1.server.time_zone = server_time_zone;
4661 conn->smb1.server.system_time = server_system_time;
4662
4663 tevent_req_done(req);
4664 }
4665
4666 static size_t smbXcli_padding_helper(uint32_t offset, size_t n)
4667 {
4668 if ((offset & (n-1)) == 0) return 0;
4669 return n - (offset & (n-1));
4670 }
4671
4672 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4673 {
4674 size_t i;
4675 uint8_t *buf;
4676 uint16_t dialect_count = 0;
4677 DATA_BLOB dyn = data_blob_null;
4678
4679 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4680 bool ok;
4681 uint8_t val[2];
4682
4683 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4684 continue;
4685 }
4686
4687 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4688 continue;
4689 }
4690
4691 SSVAL(val, 0, smb2cli_prots[i].smb2_dialect);
4692
4693 ok = data_blob_append(state, &dyn, val, sizeof(val));
4694 if (!ok) {
4695 return NULL;
4696 }
4697
4698 dialect_count++;
4699 }
4700
4701 buf = state->smb2.fixed;
4702 SSVAL(buf, 0, 36);
4703 SSVAL(buf, 2, dialect_count);
4704 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4705 SSVAL(buf, 6, 0); /* Reserved */
4706 if (state->conn->max_protocol >= PROTOCOL_SMB2_22) {
4707 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4708 } else {
4709 SIVAL(buf, 8, 0); /* Capabilities */
4710 }
4711 if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
4712 NTSTATUS status;
4713 DATA_BLOB blob;
4714
4715 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4716 state, &blob);
4717 if (!NT_STATUS_IS_OK(status)) {
4718 return NULL;
4719 }
4720 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4721 } else {
4722 memset(buf+12, 0, 16); /* ClientGuid */
4723 }
4724
4725 if (state->conn->max_protocol >= PROTOCOL_SMB3_10) {
4726 NTSTATUS status;
4727 struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4728 uint32_t offset;
4729 DATA_BLOB b;
4730 uint8_t p[38];
4731 const uint8_t zeros[8] = {0, };
4732 size_t pad;
4733 bool ok;
4734
4735 SSVAL(p, 0, 1); /* HashAlgorithmCount */
4736 SSVAL(p, 2, 32); /* SaltLength */
4737 SSVAL(p, 4, SMB2_PREAUTH_INTEGRITY_SHA512);
4738 generate_random_buffer(p + 6, 32);
4739
4740 b = data_blob_const(p, 38);
4741 status = smb2_negotiate_context_add(state, &c,
4742 SMB2_PREAUTH_INTEGRITY_CAPABILITIES, b);
4743 if (!NT_STATUS_IS_OK(status)) {
4744 return NULL;
4745 }
4746
4747 SSVAL(p, 0, 2); /* ChiperCount */
4748 /*
4749 * For now we preferr CCM because our implementation
4750 * is faster than GCM, see bug #11451.
4751 */
4752 SSVAL(p, 2, SMB2_ENCRYPTION_AES128_CCM);
4753 SSVAL(p, 4, SMB2_ENCRYPTION_AES128_GCM);
4754
4755 b = data_blob_const(p, 6);
4756 status = smb2_negotiate_context_add(state, &c,
4757 SMB2_ENCRYPTION_CAPABILITIES, b);
4758 if (!NT_STATUS_IS_OK(status)) {
4759 return NULL;
4760 }
4761
4762 status = smb2_negotiate_context_push(state, &b, c);
4763 if (!NT_STATUS_IS_OK(status)) {
4764 return NULL;
4765 }
4766
4767 offset = SMB2_HDR_BODY + sizeof(state->smb2.fixed) + dyn.length;
4768 pad = smbXcli_padding_helper(offset, 8);
4769
4770 ok = data_blob_append(state, &dyn, zeros, pad);
4771 if (!ok) {
4772 return NULL;
4773 }
4774 offset += pad;
4775
4776 ok = data_blob_append(state, &dyn, b.data, b.length);
4777 if (!ok) {
4778 return NULL;
4779 }
4780
4781 SIVAL(buf, 28, offset); /* NegotiateContextOffset */
4782 SSVAL(buf, 32, c.num_contexts); /* NegotiateContextCount */
4783 SSVAL(buf, 34, 0); /* Reserved */
4784 } else {
4785 SBVAL(buf, 28, 0); /* Reserved/ClientStartTime */
4786 }
4787
4788 return smb2cli_req_send(state, state->ev,
4789 state->conn, SMB2_OP_NEGPROT,
4790 0, 0, /* flags */
4791 state->timeout_msec,
4792 NULL, NULL, /* tcon, session */
4793 state->smb2.fixed, sizeof(state->smb2.fixed),
4794 dyn.data, dyn.length,
4795 UINT16_MAX); /* max_dyn_len */
4796 }
4797
4798 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4799 {
4800 struct tevent_req *req =
4801 tevent_req_callback_data(subreq,
4802 struct tevent_req);
4803 struct smbXcli_negprot_state *state =
4804 tevent_req_data(req,
4805 struct smbXcli_negprot_state);
4806 struct smbXcli_conn *conn = state->conn;
4807 size_t security_offset, security_length;
4808 DATA_BLOB blob;
4809 NTSTATUS status;
4810 struct iovec *iov;
4811 uint8_t *body;
4812 size_t i;
4813 uint16_t dialect_revision;
4814 struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4815 uint32_t negotiate_context_offset = 0;
4816 uint16_t negotiate_context_count = 0;
4817 DATA_BLOB negotiate_context_blob = data_blob_null;
4818 size_t avail;
4819 size_t ctx_ofs;
4820 size_t needed;
4821 struct smb2_negotiate_context *preauth = NULL;
4822 uint16_t hash_count;
4823 uint16_t salt_length;
4824 uint16_t hash_selected;
4825 struct hc_sha512state sctx;
4826 struct smb2_negotiate_context *cipher = NULL;
4827 struct iovec sent_iov[3];
4828 static const struct smb2cli_req_expected_response expected[] = {
4829 {
4830 .status = NT_STATUS_OK,
4831 .body_size = 0x41
4832 }
4833 };
4834
4835 status = smb2cli_req_recv(subreq, state, &iov,
4836 expected, ARRAY_SIZE(expected));
4837 if (tevent_req_nterror(req, status)) {
4838 return;
4839 }
4840
4841 body = (uint8_t *)iov[1].iov_base;
4842
4843 dialect_revision = SVAL(body, 4);
4844
4845 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4846 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4847 continue;
4848 }
4849
4850 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4851 continue;
4852 }
4853
4854 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4855 continue;
4856 }
4857
4858 conn->protocol = smb2cli_prots[i].proto;
4859 break;
4860 }
4861
4862 if (conn->protocol == PROTOCOL_NONE) {
4863 TALLOC_FREE(subreq);
4864
4865 if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
4866 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4867 return;
4868 }
4869
4870 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4871 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4872 return;
4873 }
4874
4875 /* make sure we do not loop forever */
4876 state->conn->min_protocol = PROTOCOL_SMB2_02;
4877
4878 /*
4879 * send a SMB2 negprot, in order to negotiate
4880 * the SMB2 dialect.
4881 */
4882 subreq = smbXcli_negprot_smb2_subreq(state);
4883 if (tevent_req_nomem(subreq, req)) {
4884 return;
4885 }
4886 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4887 return;
4888 }
4889
4890 conn->smb2.server.security_mode = SVAL(body, 2);
4891 if (conn->protocol >= PROTOCOL_SMB3_10) {
4892 negotiate_context_count = SVAL(body, 6);
4893 }
4894
4895 blob = data_blob_const(body + 8, 16);
4896 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4897 if (tevent_req_nterror(req, status)) {
4898 return;
4899 }
4900
4901 conn->smb2.server.capabilities = IVAL(body, 24);
4902 conn->smb2.server.max_trans_size= IVAL(body, 28);
4903 conn->smb2.server.max_read_size = IVAL(body, 32);
4904 conn->smb2.server.max_write_size= IVAL(body, 36);
4905 conn->smb2.server.system_time = BVAL(body, 40);
4906 conn->smb2.server.start_time = BVAL(body, 48);
4907
4908 security_offset = SVAL(body, 56);
4909 security_length = SVAL(body, 58);
4910
4911 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4912 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4913 return;
4914 }
4915
4916 if (security_length > iov[2].iov_len) {
4917 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4918 return;
4919 }
4920
4921 conn->smb2.server.gss_blob = data_blob_talloc(conn,
4922 iov[2].iov_base,
4923 security_length);
4924 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4925 return;
4926 }
4927
4928 if (conn->protocol < PROTOCOL_SMB3_10) {
4929 TALLOC_FREE(subreq);
4930
4931 if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
4932 conn->smb2.server.cipher = SMB2_ENCRYPTION_AES128_CCM;
4933 }
4934 tevent_req_done(req);
4935 return;
4936 }
4937
4938 /*
4939 * Here we are now at SMB3_11, so encryption should be
4940 * negotiated via context, not capabilities.
4941 */
4942
4943 if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
4944 /*
4945 * Server set SMB2_CAP_ENCRYPTION capability,
4946 * but *SHOULD* not, not *MUST* not. Just mask it off.
4947 * NetApp seems to do this:
4948 * BUG: https://bugzilla.samba.org/show_bug.cgi?id=13009
4949 */
4950 conn->smb2.server.capabilities &= ~SMB2_CAP_ENCRYPTION;
4951 }
4952
4953 negotiate_context_offset = IVAL(body, 60);
4954 if (negotiate_context_offset < security_offset) {
4955 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4956 return;
4957 }
4958
4959 ctx_ofs = negotiate_context_offset - security_offset;
4960 if (ctx_ofs > iov[2].iov_len) {
4961 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4962 return;
4963 }
4964 avail = iov[2].iov_len - security_length;
4965 needed = iov[2].iov_len - ctx_ofs;
4966 if (needed > avail) {
4967 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4968 return;
4969 }
4970
4971 negotiate_context_blob.data = (uint8_t *)iov[2].iov_base;
4972 negotiate_context_blob.length = iov[2].iov_len;
4973
4974 negotiate_context_blob.data += ctx_ofs;
4975 negotiate_context_blob.length -= ctx_ofs;
4976
4977 status = smb2_negotiate_context_parse(state, negotiate_context_blob, &c);
4978 if (tevent_req_nterror(req, status)) {
4979 return;
4980 }
4981
4982 if (negotiate_context_count != c.num_contexts) {
4983 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4984 return;
4985 }
4986
4987 preauth = smb2_negotiate_context_find(&c,
4988 SMB2_PREAUTH_INTEGRITY_CAPABILITIES);
4989 if (preauth == NULL) {
4990 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4991 return;
4992 }
4993
4994 if (preauth->data.length < 6) {
4995 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4996 return;
4997 }
4998
4999 hash_count = SVAL(preauth->data.data, 0);
5000 salt_length = SVAL(preauth->data.data, 2);
5001 hash_selected = SVAL(preauth->data.data, 4);
5002
5003 if (hash_count != 1) {
5004 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5005 return;
5006 }
5007
5008 if (preauth->data.length != (6 + salt_length)) {
5009 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5010 return;
5011 }
5012
5013 if (hash_selected != SMB2_PREAUTH_INTEGRITY_SHA512) {
5014 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5015 return;
5016 }
5017
5018 cipher = smb2_negotiate_context_find(&c, SMB2_ENCRYPTION_CAPABILITIES);
5019 if (cipher != NULL) {
5020 uint16_t cipher_count;
5021
5022 if (cipher->data.length < 2) {
5023 tevent_req_nterror(req,
5024 NT_STATUS_INVALID_NETWORK_RESPONSE);
5025 return;
5026 }
5027
5028 cipher_count = SVAL(cipher->data.data, 0);
5029
5030 if (cipher_count > 1) {
5031 tevent_req_nterror(req,
5032 NT_STATUS_INVALID_NETWORK_RESPONSE);
5033 return;
5034 }
5035
5036 if (cipher->data.length != (2 + 2 * cipher_count)) {
5037 tevent_req_nterror(req,
5038 NT_STATUS_INVALID_NETWORK_RESPONSE);
5039 return;
5040 }
5041
5042 if (cipher_count == 1) {
5043 uint16_t cipher_selected;
5044
5045 cipher_selected = SVAL(cipher->data.data, 2);
5046
5047 switch (cipher_selected) {
5048 case SMB2_ENCRYPTION_AES128_GCM:
5049 case SMB2_ENCRYPTION_AES128_CCM:
5050 conn->smb2.server.cipher = cipher_selected;
5051 break;
5052 }
5053 }
5054 }
5055
5056 /* First we hash the request */
5057 smb2cli_req_get_sent_iov(subreq, sent_iov);
5058 samba_SHA512_Init(&sctx);
5059 samba_SHA512_Update(&sctx, conn->smb2.preauth_sha512,
5060 sizeof(conn->smb2.preauth_sha512));
5061 for (i = 0; i < 3; i++) {
5062 samba_SHA512_Update(&sctx, sent_iov[i].iov_base, sent_iov[i].iov_len);
5063 }
5064 samba_SHA512_Final(conn->smb2.preauth_sha512, &sctx);
5065 TALLOC_FREE(subreq);
5066
5067 /* And now we hash the response */
5068 samba_SHA512_Init(&sctx);
5069 samba_SHA512_Update(&sctx, conn->smb2.preauth_sha512,
5070 sizeof(conn->smb2.preauth_sha512));
5071 for (i = 0; i < 3; i++) {
5072 samba_SHA512_Update(&sctx, iov[i].iov_base, iov[i].iov_len);
5073 }
5074 samba_SHA512_Final(conn->smb2.preauth_sha512, &sctx);
5075
5076 tevent_req_done(req);
5077 }
5078
5079 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
5080 TALLOC_CTX *tmp_mem,
5081 uint8_t *inbuf)
5082 {
5083 size_t num_pending = talloc_array_length(conn->pending);
5084 struct tevent_req *subreq;
5085 struct smbXcli_req_state *substate;
5086 struct tevent_req *req;
5087 uint32_t protocol_magic;
5088 size_t inbuf_len = smb_len_nbt(inbuf);
5089
5090 if (num_pending != 1) {
5091 return NT_STATUS_INTERNAL_ERROR;
5092 }
5093
5094 if (inbuf_len < 4) {
5095 return NT_STATUS_INVALID_NETWORK_RESPONSE;
5096 }
5097
5098 subreq = conn->pending[0];
5099 substate = tevent_req_data(subreq, struct smbXcli_req_state);
5100 req = tevent_req_callback_data(subreq, struct tevent_req);
5101
5102 protocol_magic = IVAL(inbuf, 4);
5103
5104 switch (protocol_magic) {
5105 case SMB_MAGIC:
5106 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
5107 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
5108 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
5109
5110 case SMB2_MAGIC:
5111 if (substate->smb2.recv_iov == NULL) {
5112 /*
5113 * For the SMB1 negprot we have move it.
5114 */
5115 substate->smb2.recv_iov = substate->smb1.recv_iov;
5116 substate->smb1.recv_iov = NULL;
5117 }
5118
5119 /*
5120 * we got an SMB2 answer, which consumed sequence number 0
5121 * so we need to use 1 as the next one.
5122 *
5123 * we also need to set the current credits to 0
5124 * as we consumed the initial one. The SMB2 answer
5125 * hopefully grant us a new credit.
5126 */
5127 conn->smb2.mid = 1;
5128 conn->smb2.cur_credits = 0;
5129 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
5130 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
5131 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
5132 }
5133
5134 DEBUG(10, ("Got non-SMB PDU\n"));
5135 return NT_STATUS_INVALID_NETWORK_RESPONSE;
5136 }
5137
5138 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
5139 {
5140 return tevent_req_simple_recv_ntstatus(req);
5141 }
5142
5143 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
5144 uint32_t timeout_msec,
5145 enum protocol_types min_protocol,
5146 enum protocol_types max_protocol)
5147 {
5148 TALLOC_CTX *frame = talloc_stackframe();
5149 struct tevent_context *ev;
5150 struct tevent_req *req;
5151 NTSTATUS status = NT_STATUS_NO_MEMORY;
5152 bool ok;
5153
5154 if (smbXcli_conn_has_async_calls(conn)) {
5155 /*
5156 * Can't use sync call while an async call is in flight
5157 */
5158 status = NT_STATUS_INVALID_PARAMETER_MIX;
5159 goto fail;
5160 }
5161 ev = samba_tevent_context_init(frame);
5162 if (ev == NULL) {
5163 goto fail;
5164 }
5165 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
5166 min_protocol, max_protocol,
5167 WINDOWS_CLIENT_PURE_SMB2_NEGPROT_INITIAL_CREDIT_ASK);
5168 if (req == NULL) {
5169 goto fail;
5170 }
5171 ok = tevent_req_poll_ntstatus(req, ev, &status);
5172 if (!ok) {
5173 goto fail;
5174 }
5175 status = smbXcli_negprot_recv(req);
5176 fail:
5177 TALLOC_FREE(frame);
5178 return status;
5179 }
5180
5181 struct smb2cli_validate_negotiate_info_state {
5182 struct smbXcli_conn *conn;
5183 DATA_BLOB in_input_buffer;
5184 DATA_BLOB in_output_buffer;
5185 DATA_BLOB out_input_buffer;
5186 DATA_BLOB out_output_buffer;
5187 uint16_t dialect;
5188 };
5189
5190 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq);
5191
5192 struct tevent_req *smb2cli_validate_negotiate_info_send(TALLOC_CTX *mem_ctx,
5193 struct tevent_context *ev,
5194 struct smbXcli_conn *conn,
5195 uint32_t timeout_msec,
5196 struct smbXcli_session *session,
5197 struct smbXcli_tcon *tcon)
5198 {
5199 struct tevent_req *req;
5200 struct smb2cli_validate_negotiate_info_state *state;
5201 uint8_t *buf;
5202 uint16_t dialect_count = 0;
5203 struct tevent_req *subreq;
5204 bool _save_should_sign;
5205 size_t i;
5206
5207 req = tevent_req_create(mem_ctx, &state,
5208 struct smb2cli_validate_negotiate_info_state);
5209 if (req == NULL) {
5210 return NULL;
5211 }
5212 state->conn = conn;
5213
5214 state->in_input_buffer = data_blob_talloc_zero(state,
5215 4 + 16 + 1 + 1 + 2);
5216 if (tevent_req_nomem(state->in_input_buffer.data, req)) {
5217 return tevent_req_post(req, ev);
5218 }
5219 buf = state->in_input_buffer.data;
5220
5221 if (state->conn->max_protocol >= PROTOCOL_SMB2_22) {
5222 SIVAL(buf, 0, conn->smb2.client.capabilities);
5223 } else {
5224 SIVAL(buf, 0, 0); /* Capabilities */
5225 }
5226 if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
5227 NTSTATUS status;
5228 DATA_BLOB blob;
5229
5230 status = GUID_to_ndr_blob(&conn->smb2.client.guid,
5231 state, &blob);
5232 if (!NT_STATUS_IS_OK(status)) {
5233 return NULL;
5234 }
5235 memcpy(buf+4, blob.data, 16); /* ClientGuid */
5236 } else {
5237 memset(buf+4, 0, 16); /* ClientGuid */
5238 }
5239 if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
5240 SCVAL(buf, 20, conn->smb2.client.security_mode);
5241 } else {
5242 SCVAL(buf, 20, 0);
5243 }
5244 SCVAL(buf, 21, 0); /* reserved */
5245
5246 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
5247 bool ok;
5248 size_t ofs;
5249
5250 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
5251 continue;
5252 }
5253
5254 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
5255 continue;
5256 }
5257
5258 if (smb2cli_prots[i].proto == state->conn->protocol) {
5259 state->dialect = smb2cli_prots[i].smb2_dialect;
5260 }
5261
5262 ofs = state->in_input_buffer.length;
5263 ok = data_blob_realloc(state, &state->in_input_buffer,
5264 ofs + 2);
5265 if (!ok) {
5266 tevent_req_oom(req);
5267 return tevent_req_post(req, ev);
5268 }
5269
5270 buf = state->in_input_buffer.data;
5271 SSVAL(buf, ofs, smb2cli_prots[i].smb2_dialect);
5272
5273 dialect_count++;
5274 }
5275 buf = state->in_input_buffer.data;
5276 SSVAL(buf, 22, dialect_count);
5277
5278 _save_should_sign = smb2cli_tcon_is_signing_on(tcon);
5279 smb2cli_tcon_should_sign(tcon, true);
5280 subreq = smb2cli_ioctl_send(state, ev, conn,
5281 timeout_msec, session, tcon,
5282 UINT64_MAX, /* in_fid_persistent */
5283 UINT64_MAX, /* in_fid_volatile */
5284 FSCTL_VALIDATE_NEGOTIATE_INFO,
5285 0, /* in_max_input_length */
5286 &state->in_input_buffer,
5287 24, /* in_max_output_length */
5288 &state->in_output_buffer,
5289 SMB2_IOCTL_FLAG_IS_FSCTL);
5290 smb2cli_tcon_should_sign(tcon, _save_should_sign);
5291 if (tevent_req_nomem(subreq, req)) {
5292 return tevent_req_post(req, ev);
5293 }
5294 tevent_req_set_callback(subreq,
5295 smb2cli_validate_negotiate_info_done,
5296 req);
5297
5298 return req;
5299 }
5300
5301 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq)
5302 {
5303 struct tevent_req *req =
5304 tevent_req_callback_data(subreq,
5305 struct tevent_req);
5306 struct smb2cli_validate_negotiate_info_state *state =
5307 tevent_req_data(req,
5308 struct smb2cli_validate_negotiate_info_state);
5309 NTSTATUS status;
5310 const uint8_t *buf;
5311 uint32_t capabilities;
5312 DATA_BLOB guid_blob;
5313 struct GUID server_guid;
5314 uint16_t security_mode;
5315 uint16_t dialect;
5316
5317 status = smb2cli_ioctl_recv(subreq, state,
5318 &state->out_input_buffer,
5319 &state->out_output_buffer);
5320 TALLOC_FREE(subreq);
5321 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED)) {
5322 /*
5323 * The response was signed, but not supported
5324 *
5325 * Older Windows and Samba releases return
5326 * NT_STATUS_FILE_CLOSED.
5327 */
5328 tevent_req_done(req);
5329 return;
5330 }
5331 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_DEVICE_REQUEST)) {
5332 /*
5333 * The response was signed, but not supported
5334 *
5335 * This is returned by the NTVFS based Samba 4.x file server
5336 * for file shares.
5337 */
5338 tevent_req_done(req);
5339 return;
5340 }
5341 if (NT_STATUS_EQUAL(status, NT_STATUS_FS_DRIVER_REQUIRED)) {
5342 /*
5343 * The response was signed, but not supported
5344 *
5345 * This is returned by the NTVFS based Samba 4.x file server
5346 * for ipc shares.
5347 */
5348 tevent_req_done(req);
5349 return;
5350 }
5351 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
5352 /*
5353 * The response was signed, but not supported
5354 *
5355 * This might be returned by older Windows versions or by
5356 * NetApp SMB server implementations.
5357 *
5358 * See
5359 *
5360 * https://blogs.msdn.microsoft.com/openspecification/2012/06/28/smb3-secure-dialect-negotiation/
5361 *
5362 */
5363 tevent_req_done(req);
5364 return;
5365 }
5366 if (tevent_req_nterror(req, status)) {
5367 return;
5368 }
5369
5370 if (state->out_output_buffer.length != 24) {
5371 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5372 return;
5373 }
5374
5375 buf = state->out_output_buffer.data;
5376
5377 capabilities = IVAL(buf, 0);
5378 guid_blob = data_blob_const(buf + 4, 16);
5379 status = GUID_from_data_blob(&guid_blob, &server_guid);
5380 if (tevent_req_nterror(req, status)) {
5381 return;
5382 }
5383 security_mode = CVAL(buf, 20);
5384 dialect = SVAL(buf, 22);
5385
5386 if (capabilities != state->conn->smb2.server.capabilities) {
5387 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5388 return;
5389 }
5390
5391 if (!GUID_equal(&server_guid, &state->conn->smb2.server.guid)) {
5392 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5393 return;
5394 }
5395
5396 if (security_mode != state->conn->smb2.server.security_mode) {
5397 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5398 return;
5399 }
5400
5401 if (dialect != state->dialect) {
5402 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5403 return;
5404 }
5405
5406 tevent_req_done(req);
5407 }
5408
5409 NTSTATUS smb2cli_validate_negotiate_info_recv(struct tevent_req *req)
5410 {
5411 return tevent_req_simple_recv_ntstatus(req);
5412 }
5413
5414 static int smbXcli_session_destructor(struct smbXcli_session *session)
5415 {
5416 if (session->conn == NULL) {
5417 return 0;
5418 }
5419
5420 DLIST_REMOVE(session->conn->sessions, session);
5421 return 0;
5422 }
5423
5424 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
5425 struct smbXcli_conn *conn)
5426 {
5427 struct smbXcli_session *session;
5428
5429 session = talloc_zero(mem_ctx, struct smbXcli_session);
5430 if (session == NULL) {
5431 return NULL;
5432 }
5433 session->smb2 = talloc_zero(session, struct smb2cli_session);
5434 if (session->smb2 == NULL) {
5435 talloc_free(session);
5436 return NULL;
5437 }
5438 talloc_set_destructor(session, smbXcli_session_destructor);
5439
5440 DLIST_ADD_END(conn->sessions, session);
5441 session->conn = conn;
5442
5443 memcpy(session->smb2_channel.preauth_sha512,
5444 conn->smb2.preauth_sha512,
5445 sizeof(session->smb2_channel.preauth_sha512));
5446
5447 return session;
5448 }
5449
5450 struct smbXcli_session *smbXcli_session_copy(TALLOC_CTX *mem_ctx,
5451 struct smbXcli_session *src)
5452 {
5453 struct smbXcli_session *session;
5454
5455 session = talloc_zero(mem_ctx, struct smbXcli_session);
5456 if (session == NULL) {
5457 return NULL;
5458 }
5459 session->smb2 = talloc_zero(session, struct smb2cli_session);
5460 if (session->smb2 == NULL) {
5461 talloc_free(session);
5462 return NULL;
5463 }
5464
5465 session->conn = src->conn;
5466 *session->smb2 = *src->smb2;
5467 session->smb2_channel = src->smb2_channel;
5468 session->disconnect_expired = src->disconnect_expired;
5469
5470 DLIST_ADD_END(src->conn->sessions, session);
5471 talloc_set_destructor(session, smbXcli_session_destructor);
5472
5473 return session;
5474 }
5475
5476 bool smbXcli_session_is_guest(struct smbXcli_session *session)
5477 {
5478 if (session == NULL) {
5479 return false;
5480 }
5481
5482 if (session->conn == NULL) {
5483 return false;
5484 }
5485
5486 if (session->conn->mandatory_signing) {
5487 return false;
5488 }
5489
5490 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5491 if (session->smb2->session_flags & SMB2_SESSION_FLAG_IS_GUEST) {
5492 return true;
5493 }
5494 return false;
5495 }
5496
5497 if (session->smb1.action & SMB_SETUP_GUEST) {
5498 return true;
5499 }
5500
5501 return false;
5502 }
5503
5504 bool smbXcli_session_is_authenticated(struct smbXcli_session *session)
5505 {
5506 const DATA_BLOB *application_key;
5507
5508 if (session == NULL) {
5509 return false;
5510 }
5511
5512 if (session->conn == NULL) {
5513 return false;
5514 }
5515
5516 /*
5517 * If we have an application key we had a session key negotiated
5518 * at auth time.
5519 */
5520 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5521 application_key = &session->smb2->application_key;
5522 } else {
5523 application_key = &session->smb1.application_key;
5524 }
5525
5526 if (application_key->length == 0) {
5527 return false;
5528 }
5529
5530 return true;
5531 }
5532
5533 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
5534 TALLOC_CTX *mem_ctx,
5535 DATA_BLOB *key)
5536 {
5537 const DATA_BLOB *application_key;
5538
5539 *key = data_blob_null;
5540
5541 if (session->conn == NULL) {
5542 return NT_STATUS_NO_USER_SESSION_KEY;
5543 }
5544
5545 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5546 application_key = &session->smb2->application_key;
5547 } else {
5548 application_key = &session->smb1.application_key;
5549 }
5550
5551 if (application_key->length == 0) {
5552 return NT_STATUS_NO_USER_SESSION_KEY;
5553 }
5554
5555 *key = data_blob_dup_talloc(mem_ctx, *application_key);
5556 if (key->data == NULL) {
5557 return NT_STATUS_NO_MEMORY;
5558 }
5559
5560 return NT_STATUS_OK;
5561 }
5562
5563 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
5564 {
5565 session->disconnect_expired = true;
5566 }
5567
5568 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
5569 {
5570 return session->smb1.session_id;
5571 }
5572
5573 void smb1cli_session_set_id(struct smbXcli_session *session,
5574 uint16_t session_id)
5575 {
5576 session->smb1.session_id = session_id;
5577 }
5578
5579 void smb1cli_session_set_action(struct smbXcli_session *session,
5580 uint16_t action)
5581 {
5582 session->smb1.action = action;
5583 }
5584
5585 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
5586 const DATA_BLOB _session_key)
5587 {
5588 struct smbXcli_conn *conn = session->conn;
5589 uint8_t session_key[16];
5590
5591 if (conn == NULL) {
5592 return NT_STATUS_INVALID_PARAMETER_MIX;
5593 }
5594
5595 if (session->smb1.application_key.length != 0) {
5596 /*
5597 * TODO: do not allow this...
5598 *
5599 * return NT_STATUS_INVALID_PARAMETER_MIX;
5600 */
5601 data_blob_clear_free(&session->smb1.application_key);
5602 session->smb1.protected_key = false;
5603 }
5604
5605 if (_session_key.length == 0) {
5606 return NT_STATUS_OK;
5607 }
5608
5609 ZERO_STRUCT(session_key);
5610 memcpy(session_key, _session_key.data,
5611 MIN(_session_key.length, sizeof(session_key)));
5612
5613 session->smb1.application_key = data_blob_talloc(session,
5614 session_key,
5615 sizeof(session_key));
5616 ZERO_STRUCT(session_key);
5617 if (session->smb1.application_key.data == NULL) {
5618 return NT_STATUS_NO_MEMORY;
5619 }
5620
5621 session->smb1.protected_key = false;
5622
5623 return NT_STATUS_OK;
5624 }
5625
5626 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
5627 {
5628 if (session->smb1.protected_key) {
5629 /* already protected */
5630 return NT_STATUS_OK;
5631 }
5632
5633 if (session->smb1.application_key.length != 16) {
5634 return NT_STATUS_INVALID_PARAMETER_MIX;
5635 }
5636
5637 smb_key_derivation(session->smb1.application_key.data,
5638 session->smb1.application_key.length,
5639 session->smb1.application_key.data);
5640
5641 session->smb1.protected_key = true;
5642
5643 return NT_STATUS_OK;
5644 }
5645
5646 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
5647 {
5648 struct smbXcli_conn *conn = session->conn;
5649 uint8_t security_mode = 0;
5650
5651 if (conn == NULL) {
5652 return security_mode;
5653 }
5654
5655 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
5656 if (conn->mandatory_signing) {
5657 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
5658 }
5659 if (session->smb2->should_sign) {
5660 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
5661 }
5662
5663 return security_mode;
5664 }
5665
5666 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
5667 {
5668 return session->smb2->session_id;
5669 }
5670
5671 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
5672 {
5673 return session->smb2->session_flags;
5674 }
5675
5676 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
5677 uint64_t session_id,
5678 uint16_t session_flags)
5679 {
5680 session->smb2->session_id = session_id;
5681 session->smb2->session_flags = session_flags;
5682 }
5683
5684 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
5685 {
5686 session->smb2->channel_sequence += 1;
5687 }
5688
5689 uint16_t smb2cli_session_reset_channel_sequence(struct smbXcli_session *session,
5690 uint16_t channel_sequence)
5691 {
5692 uint16_t prev_cs;
5693
5694 prev_cs = session->smb2->channel_sequence;
5695 session->smb2->channel_sequence = channel_sequence;
5696
5697 return prev_cs;
5698 }
5699
5700 uint16_t smb2cli_session_current_channel_sequence(struct smbXcli_session *session)
5701 {
5702 return session->smb2->channel_sequence;
5703 }
5704
5705 void smb2cli_session_start_replay(struct smbXcli_session *session)
5706 {
5707 session->smb2->replay_active = true;
5708 }
5709
5710 void smb2cli_session_stop_replay(struct smbXcli_session *session)
5711 {
5712 session->smb2->replay_active = false;
5713 }
5714
5715 NTSTATUS smb2cli_session_update_preauth(struct smbXcli_session *session,
5716 const struct iovec *iov)
5717 {
5718 struct hc_sha512state sctx;
5719 size_t i;
5720
5721 if (session->conn == NULL) {
5722 return NT_STATUS_INTERNAL_ERROR;
5723 }
5724
5725 if (session->conn->protocol < PROTOCOL_SMB3_10) {
5726 return NT_STATUS_OK;
5727 }
5728
5729 if (session->smb2_channel.signing_key.length != 0) {
5730 return NT_STATUS_OK;
5731 }
5732
5733 samba_SHA512_Init(&sctx);
5734 samba_SHA512_Update(&sctx, session->smb2_channel.preauth_sha512,
5735 sizeof(session->smb2_channel.preauth_sha512));
5736 for (i = 0; i < 3; i++) {
5737 samba_SHA512_Update(&sctx, iov[i].iov_base, iov[i].iov_len);
5738 }
5739 samba_SHA512_Final(session->smb2_channel.preauth_sha512, &sctx);
5740
5741 return NT_STATUS_OK;
5742 }
5743
5744 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
5745 const DATA_BLOB _session_key,
5746 const struct iovec *recv_iov)
5747 {
5748 struct smbXcli_conn *conn = session->conn;
5749 uint16_t no_sign_flags = 0;
5750 uint8_t session_key[16];
5751 bool check_signature = true;
5752 uint32_t hdr_flags;
5753 NTSTATUS status;
5754 struct _derivation {
5755 DATA_BLOB label;
5756 DATA_BLOB context;
5757 };
5758 struct {
5759 struct _derivation signing;
5760 struct _derivation encryption;
5761 struct _derivation decryption;
5762 struct _derivation application;
5763 } derivation = { };
5764 size_t nonce_size = 0;
5765
5766 if (conn == NULL) {
5767 return NT_STATUS_INVALID_PARAMETER_MIX;
5768 }
5769
5770 if (recv_iov[0].iov_len != SMB2_HDR_BODY) {
5771 return NT_STATUS_INVALID_PARAMETER_MIX;
5772 }
5773
5774 if (!conn->mandatory_signing) {
5775 /*
5776 * only allow guest sessions without
5777 * mandatory signing.
5778 *
5779 * If we try an authentication with username != ""
5780 * and the server let us in without verifying the
5781 * password we don't have a negotiated session key
5782 * for signing.
5783 */
5784 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST;
5785 }
5786
5787 if (session->smb2->session_flags & no_sign_flags) {
5788 session->smb2->should_sign = false;
5789 return NT_STATUS_OK;
5790 }
5791
5792 if (session->smb2->signing_key.length != 0) {
5793 return NT_STATUS_INVALID_PARAMETER_MIX;
5794 }
5795
5796 if (conn->protocol >= PROTOCOL_SMB3_10) {
5797 struct _derivation *d;
5798 DATA_BLOB p;
5799
5800 p = data_blob_const(session->smb2_channel.preauth_sha512,
5801 sizeof(session->smb2_channel.preauth_sha512));
5802
5803 d = &derivation.signing;
5804 d->label = data_blob_string_const_null("SMBSigningKey");
5805 d->context = p;
5806
5807 d = &derivation.encryption;
5808 d->label = data_blob_string_const_null("SMBC2SCipherKey");
5809 d->context = p;
5810
5811 d = &derivation.decryption;
5812 d->label = data_blob_string_const_null("SMBS2CCipherKey");
5813 d->context = p;
5814
5815 d = &derivation.application;
5816 d->label = data_blob_string_const_null("SMBAppKey");
5817 d->context = p;
5818
5819 } else if (conn->protocol >= PROTOCOL_SMB2_24) {
5820 struct _derivation *d;
5821
5822 d = &derivation.signing;
5823 d->label = data_blob_string_const_null("SMB2AESCMAC");
5824 d->context = data_blob_string_const_null("SmbSign");
5825
5826 d = &derivation.encryption;
5827 d->label = data_blob_string_const_null("SMB2AESCCM");
5828 d->context = data_blob_string_const_null("ServerIn ");
5829
5830 d = &derivation.decryption;
5831 d->label = data_blob_string_const_null("SMB2AESCCM");
5832 d->context = data_blob_string_const_null("ServerOut");
5833
5834 d = &derivation.application;
5835 d->label = data_blob_string_const_null("SMB2APP");
5836 d->context = data_blob_string_const_null("SmbRpc");
5837 }
5838
5839 ZERO_STRUCT(session_key);
5840 memcpy(session_key, _session_key.data,
5841 MIN(_session_key.length, sizeof(session_key)));
5842
5843 session->smb2->signing_key = data_blob_talloc(session,
5844 session_key,
5845 sizeof(session_key));
5846 if (session->smb2->signing_key.data == NULL) {
5847 ZERO_STRUCT(session_key);
5848 return NT_STATUS_NO_MEMORY;
5849 }
5850
5851 if (conn->protocol >= PROTOCOL_SMB2_24) {
5852 struct _derivation *d = &derivation.signing;
5853
5854 smb2_key_derivation(session_key, sizeof(session_key),
5855 d->label.data, d->label.length,
5856 d->context.data, d->context.length,
5857 session->smb2->signing_key.data);
5858 }
5859
5860 session->smb2->encryption_key = data_blob_dup_talloc(session,
5861 session->smb2->signing_key);
5862 if (session->smb2->encryption_key.data == NULL) {
5863 ZERO_STRUCT(session_key);
5864 return NT_STATUS_NO_MEMORY;
5865 }
5866
5867 if (conn->protocol >= PROTOCOL_SMB2_24) {
5868 struct _derivation *d = &derivation.encryption;
5869
5870 smb2_key_derivation(session_key, sizeof(session_key),
5871 d->label.data, d->label.length,
5872 d->context.data, d->context.length,
5873 session->smb2->encryption_key.data);
5874 }
5875
5876 session->smb2->decryption_key = data_blob_dup_talloc(session,
5877 session->smb2->signing_key);
5878 if (session->smb2->decryption_key.data == NULL) {
5879 ZERO_STRUCT(session_key);
5880 return NT_STATUS_NO_MEMORY;
5881 }
5882
5883 if (conn->protocol >= PROTOCOL_SMB2_24) {
5884 struct _derivation *d = &derivation.decryption;
5885
5886 smb2_key_derivation(session_key, sizeof(session_key),
5887 d->label.data, d->label.length,
5888 d->context.data, d->context.length,
5889 session->smb2->decryption_key.data);
5890 }
5891
5892 session->smb2->application_key = data_blob_dup_talloc(session,
5893 session->smb2->signing_key);
5894 if (session->smb2->application_key.data == NULL) {
5895 ZERO_STRUCT(session_key);
5896 return NT_STATUS_NO_MEMORY;
5897 }
5898
5899 if (conn->protocol >= PROTOCOL_SMB2_24) {
5900 struct _derivation *d = &derivation.application;
5901
5902 smb2_key_derivation(session_key, sizeof(session_key),
5903 d->label.data, d->label.length,
5904 d->context.data, d->context.length,
5905 session->smb2->application_key.data);
5906 }
5907 ZERO_STRUCT(session_key);
5908
5909 session->smb2_channel.signing_key = data_blob_dup_talloc(session,
5910 session->smb2->signing_key);
5911 if (session->smb2_channel.signing_key.data == NULL) {
5912 return NT_STATUS_NO_MEMORY;
5913 }
5914
5915 check_signature = conn->mandatory_signing;
5916
5917 hdr_flags = IVAL(recv_iov[0].iov_base, SMB2_HDR_FLAGS);
5918 if (hdr_flags & SMB2_HDR_FLAG_SIGNED) {
5919 /*
5920 * Sadly some vendors don't sign the
5921 * final SMB2 session setup response
5922 *
5923 * At least Windows and Samba are always doing this
5924 * if there's a session key available.
5925 *
5926 * We only check the signature if it's mandatory
5927 * or SMB2_HDR_FLAG_SIGNED is provided.
5928 */
5929 check_signature = true;
5930 }
5931
5932 if (conn->protocol >= PROTOCOL_SMB3_10) {
5933 check_signature = true;
5934 }
5935
5936 if (check_signature) {
5937 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
5938 session->conn->protocol,
5939 recv_iov, 3);
5940 if (!NT_STATUS_IS_OK(status)) {
5941 return status;
5942 }
5943 }
5944
5945 session->smb2->should_sign = false;
5946 session->smb2->should_encrypt = false;
5947
5948 if (conn->desire_signing) {
5949 session->smb2->should_sign = true;
5950 }
5951
5952 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
5953 session->smb2->should_sign = true;
5954 }
5955
5956 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
5957 session->smb2->should_encrypt = true;
5958 }
5959
5960 if (conn->protocol < PROTOCOL_SMB2_24) {
5961 session->smb2->should_encrypt = false;
5962 }
5963
5964 if (conn->smb2.server.cipher == 0) {
5965 session->smb2->should_encrypt = false;
5966 }
5967
5968 /*
5969 * CCM and GCM algorithms must never have their
5970 * nonce wrap, or the security of the whole
5971 * communication and the keys is destroyed.
5972 * We must drop the connection once we have
5973 * transfered too much data.
5974 *
5975 * NOTE: We assume nonces greater than 8 bytes.
5976 */
5977 generate_random_buffer((uint8_t *)&session->smb2->nonce_high_random,
5978 sizeof(session->smb2->nonce_high_random));
5979 switch (conn->smb2.server.cipher) {
5980 case SMB2_ENCRYPTION_AES128_CCM:
5981 nonce_size = AES_CCM_128_NONCE_SIZE;
5982 break;
5983 case SMB2_ENCRYPTION_AES128_GCM:
5984 nonce_size = AES_GCM_128_IV_SIZE;
5985 break;
5986 default:
5987 nonce_size = 0;
5988 break;
5989 }
5990 session->smb2->nonce_high_max = SMB2_NONCE_HIGH_MAX(nonce_size);
5991 session->smb2->nonce_high = 0;
5992 session->smb2->nonce_low = 0;
5993
5994 return NT_STATUS_OK;
5995 }
5996
5997 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
5998 struct smbXcli_session *session1,
5999 struct smbXcli_conn *conn,
6000 struct smbXcli_session **_session2)
6001 {
6002 struct smbXcli_session *session2;
6003
6004 if (session1->smb2->signing_key.length == 0) {
6005 return NT_STATUS_INVALID_PARAMETER_MIX;
6006 }
6007
6008 if (conn == NULL) {
6009 return NT_STATUS_INVALID_PARAMETER_MIX;
6010 }
6011
6012 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
6013 if (session2 == NULL) {
6014 return NT_STATUS_NO_MEMORY;
6015 }
6016 session2->smb2 = talloc_reference(session2, session1->smb2);
6017 if (session2->smb2 == NULL) {
6018 talloc_free(session2);
6019 return NT_STATUS_NO_MEMORY;
6020 }
6021
6022 talloc_set_destructor(session2, smbXcli_session_destructor);
6023 DLIST_ADD_END(conn->sessions, session2);
6024 session2->conn = conn;
6025
6026 memcpy(session2->smb2_channel.preauth_sha512,
6027 conn->smb2.preauth_sha512,
6028 sizeof(session2->smb2_channel.preauth_sha512));
6029
6030 *_session2 = session2;
6031 return NT_STATUS_OK;
6032 }
6033
6034 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
6035 const DATA_BLOB _channel_key,
6036 const struct iovec *recv_iov)
6037 {
6038 struct smbXcli_conn *conn = session->conn;
6039 uint8_t channel_key[16];
6040 NTSTATUS status;
6041 struct _derivation {
6042 DATA_BLOB label;
6043 DATA_BLOB context;
6044 };
6045 struct {
6046 struct _derivation signing;
6047 } derivation = { };
6048
6049 if (conn == NULL) {
6050 return NT_STATUS_INVALID_PARAMETER_MIX;
6051 }
6052
6053 if (session->smb2_channel.signing_key.length != 0) {
6054 return NT_STATUS_INVALID_PARAMETER_MIX;
6055 }
6056
6057 if (conn->protocol >= PROTOCOL_SMB3_10) {
6058 struct _derivation *d;
6059 DATA_BLOB p;
6060
6061 p = data_blob_const(session->smb2_channel.preauth_sha512,
6062 sizeof(session->smb2_channel.preauth_sha512));
6063
6064 d = &derivation.signing;
6065 d->label = data_blob_string_const_null("SMBSigningKey");
6066 d->context = p;
6067 } else if (conn->protocol >= PROTOCOL_SMB2_24) {
6068 struct _derivation *d;
6069
6070 d = &derivation.signing;
6071 d->label = data_blob_string_const_null("SMB2AESCMAC");
6072 d->context = data_blob_string_const_null("SmbSign");
6073 }
6074
6075 ZERO_STRUCT(channel_key);
6076 memcpy(channel_key, _channel_key.data,
6077 MIN(_channel_key.length, sizeof(channel_key)));
6078
6079 session->smb2_channel.signing_key = data_blob_talloc(session,
6080 channel_key,
6081 sizeof(channel_key));
6082 if (session->smb2_channel.signing_key.data == NULL) {
6083 ZERO_STRUCT(channel_key);
6084 return NT_STATUS_NO_MEMORY;
6085 }
6086
6087 if (conn->protocol >= PROTOCOL_SMB2_24) {
6088 struct _derivation *d = &derivation.signing;
6089
6090 smb2_key_derivation(channel_key, sizeof(channel_key),
6091 d->label.data, d->label.length,
6092 d->context.data, d->context.length,
6093 session->smb2_channel.signing_key.data);
6094 }
6095 ZERO_STRUCT(channel_key);
6096
6097 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
6098 session->conn->protocol,
6099 recv_iov, 3);
6100 if (!NT_STATUS_IS_OK(status)) {
6101 return status;
6102 }
6103
6104 return NT_STATUS_OK;
6105 }
6106
6107 NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
6108 {
6109 if (!session->smb2->should_sign) {
6110 /*
6111 * We need required signing on the session
6112 * in order to prevent man in the middle attacks.
6113 */
6114 return NT_STATUS_INVALID_PARAMETER_MIX;
6115 }
6116
6117 if (session->smb2->should_encrypt) {
6118 return NT_STATUS_OK;
6119 }
6120
6121 if (session->conn->protocol < PROTOCOL_SMB2_24) {
6122 return NT_STATUS_NOT_SUPPORTED;
6123 }
6124
6125 if (session->conn->smb2.server.cipher == 0) {
6126 return NT_STATUS_NOT_SUPPORTED;
6127 }
6128
6129 if (session->smb2->signing_key.data == NULL) {
6130 return NT_STATUS_NOT_SUPPORTED;
6131 }
6132 session->smb2->should_encrypt = true;
6133 return NT_STATUS_OK;
6134 }
6135
6136 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
6137 {
6138 struct smbXcli_tcon *tcon;
6139
6140 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
6141 if (tcon == NULL) {
6142 return NULL;
6143 }
6144
6145 return tcon;
6146 }
6147
6148 /*
6149 * Return a deep structure copy of a struct smbXcli_tcon *
6150 */
6151
6152 struct smbXcli_tcon *smbXcli_tcon_copy(TALLOC_CTX *mem_ctx,
6153 const struct smbXcli_tcon *tcon_in)
6154 {
6155 struct smbXcli_tcon *tcon;
6156
6157 tcon = talloc_memdup(mem_ctx, tcon_in, sizeof(struct smbXcli_tcon));
6158 if (tcon == NULL) {
6159 return NULL;
6160 }
6161
6162 /* Deal with the SMB1 strings. */
6163 if (tcon_in->smb1.service != NULL) {
6164 tcon->smb1.service = talloc_strdup(tcon, tcon_in->smb1.service);
6165 if (tcon->smb1.service == NULL) {
6166 TALLOC_FREE(tcon);
6167 return NULL;
6168 }
6169 }
6170 if (tcon->smb1.fs_type != NULL) {
6171 tcon->smb1.fs_type = talloc_strdup(tcon, tcon_in->smb1.fs_type);
6172 if (tcon->smb1.fs_type == NULL) {
6173 TALLOC_FREE(tcon);
6174 return NULL;
6175 }
6176 }
6177 return tcon;
6178 }
6179
6180 void smbXcli_tcon_set_fs_attributes(struct smbXcli_tcon *tcon,
6181 uint32_t fs_attributes)
6182 {
6183 tcon->fs_attributes = fs_attributes;
6184 }
6185
6186 uint32_t smbXcli_tcon_get_fs_attributes(struct smbXcli_tcon *tcon)
6187 {
6188 return tcon->fs_attributes;
6189 }
6190
6191 bool smbXcli_tcon_is_dfs_share(struct smbXcli_tcon *tcon)
6192 {
6193 if (tcon == NULL) {
6194 return false;
6195 }
6196
6197 if (tcon->is_smb1) {
6198 if (tcon->smb1.optional_support & SMB_SHARE_IN_DFS) {
6199 return true;
6200 }
6201
6202 return false;
6203 }
6204
6205 if (tcon->smb2.capabilities & SMB2_SHARE_CAP_DFS) {
6206 return true;
6207 }
6208
6209 return false;
6210 }
6211
6212 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
6213 {
6214 return tcon->smb1.tcon_id;
6215 }
6216
6217 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
6218 {
6219 tcon->is_smb1 = true;
6220 tcon->smb1.tcon_id = tcon_id;
6221 }
6222
6223 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
6224 uint16_t tcon_id,
6225 uint16_t optional_support,
6226 uint32_t maximal_access,
6227 uint32_t guest_maximal_access,
6228 const char *service,
6229 const char *fs_type)
6230 {
6231 tcon->is_smb1 = true;
6232 tcon->fs_attributes = 0;
6233 tcon->smb1.tcon_id = tcon_id;
6234 tcon->smb1.optional_support = optional_support;
6235 tcon->smb1.maximal_access = maximal_access;
6236 tcon->smb1.guest_maximal_access = guest_maximal_access;
6237
6238 TALLOC_FREE(tcon->smb1.service);
6239 tcon->smb1.service = talloc_strdup(tcon, service);
6240 if (service != NULL && tcon->smb1.service == NULL) {
6241 return false;
6242 }
6243
6244 TALLOC_FREE(tcon->smb1.fs_type);
6245 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
6246 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
6247 return false;
6248 }
6249
6250 return true;
6251 }
6252
6253 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
6254 {
6255 return tcon->smb2.tcon_id;
6256 }
6257
6258 void smb2cli_tcon_set_id(struct smbXcli_tcon *tcon, uint32_t tcon_id)
6259 {
6260 tcon->smb2.tcon_id = tcon_id;
6261 }
6262
6263 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
6264 {
6265 return tcon->smb2.capabilities;
6266 }
6267
6268 uint32_t smb2cli_tcon_flags(struct smbXcli_tcon *tcon)
6269 {
6270 return tcon->smb2.flags;
6271 }
6272
6273 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
6274 struct smbXcli_session *session,
6275 uint32_t tcon_id,
6276 uint8_t type,
6277 uint32_t flags,
6278 uint32_t capabilities,
6279 uint32_t maximal_access)
6280 {
6281 tcon->is_smb1 = false;
6282 tcon->fs_attributes = 0;
6283 tcon->smb2.tcon_id = tcon_id;
6284 tcon->smb2.type = type;
6285 tcon->smb2.flags = flags;
6286 tcon->smb2.capabilities = capabilities;
6287 tcon->smb2.maximal_access = maximal_access;
6288
6289 tcon->smb2.should_sign = false;
6290 tcon->smb2.should_encrypt = false;
6291
6292 if (session == NULL) {
6293 return;
6294 }
6295
6296 tcon->smb2.should_sign = session->smb2->should_sign;
6297 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
6298
6299 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
6300 tcon->smb2.should_encrypt = true;
6301 }
6302 }
6303
6304 void smb2cli_tcon_should_sign(struct smbXcli_tcon *tcon,
6305 bool should_sign)
6306 {
6307 tcon->smb2.should_sign = should_sign;
6308 }
6309
6310 bool smb2cli_tcon_is_signing_on(struct smbXcli_tcon *tcon)
6311 {
6312 if (tcon->smb2.should_encrypt) {
6313 return true;
6314 }
6315
6316 return tcon->smb2.should_sign;
6317 }
6318
6319 void smb2cli_tcon_should_encrypt(struct smbXcli_tcon *tcon,
6320 bool should_encrypt)
6321 {
6322 tcon->smb2.should_encrypt = should_encrypt;
6323 }
6324
6325 bool smb2cli_tcon_is_encryption_on(struct smbXcli_tcon *tcon)
6326 {
6327 return tcon->smb2.should_encrypt;
6328 }
6329
6330 void smb2cli_conn_set_mid(struct smbXcli_conn *conn, uint64_t mid)
6331 {
6332 conn->smb2.mid = mid;
6333 }
6334
6335 uint64_t smb2cli_conn_get_mid(struct smbXcli_conn *conn)
6336 {
6337 return conn->smb2.mid;
6338 }
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