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As SMB3 has transport level encryption, allow smbclient -e to force encryted SMB3...
[Samba.git] / libcli / smb / smbXcli_base.c
blob8cbf27a9fc13b4bca235ddd51b1fd33234ec01f5
1 /*
2 Unix SMB/CIFS implementation.
3 Infrastructure for async SMB client requests
4 Copyright (C) Volker Lendecke 2008
5 Copyright (C) Stefan Metzmacher 2011
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "includes.h"
22 #include "system/network.h"
23 #include "../lib/async_req/async_sock.h"
24 #include "../lib/util/tevent_ntstatus.h"
25 #include "../lib/util/tevent_unix.h"
26 #include "lib/util/util_net.h"
27 #include "lib/util/dlinklist.h"
28 #include "../libcli/smb/smb_common.h"
29 #include "../libcli/smb/smb_seal.h"
30 #include "../libcli/smb/smb_signing.h"
31 #include "../libcli/smb/read_smb.h"
32 #include "smbXcli_base.h"
33 #include "librpc/ndr/libndr.h"
34
35 struct smbXcli_conn;
36 struct smbXcli_req;
37 struct smbXcli_session;
38 struct smbXcli_tcon;
39
40 struct smbXcli_conn {
41 int read_fd;
42 int write_fd;
43 struct sockaddr_storage local_ss;
44 struct sockaddr_storage remote_ss;
45 const char *remote_name;
46
47 struct tevent_queue *outgoing;
48 struct tevent_req **pending;
49 struct tevent_req *read_smb_req;
50
51 enum protocol_types protocol;
52 bool allow_signing;
53 bool desire_signing;
54 bool mandatory_signing;
55
56 /*
57 * The incoming dispatch function should return:
58 * - NT_STATUS_RETRY, if more incoming PDUs are expected.
59 * - NT_STATUS_OK, if no more processing is desired, e.g.
60 * the dispatch function called
61 * tevent_req_done().
62 * - All other return values disconnect the connection.
63 */
64 NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
65 TALLOC_CTX *tmp_mem,
66 uint8_t *inbuf);
67
68 struct {
69 struct {
70 uint32_t capabilities;
71 uint32_t max_xmit;
72 } client;
73
74 struct {
75 uint32_t capabilities;
76 uint32_t max_xmit;
77 uint16_t max_mux;
78 uint16_t security_mode;
79 bool readbraw;
80 bool writebraw;
81 bool lockread;
82 bool writeunlock;
83 uint32_t session_key;
84 struct GUID guid;
85 DATA_BLOB gss_blob;
86 uint8_t challenge[8];
87 const char *workgroup;
88 const char *name;
89 int time_zone;
90 NTTIME system_time;
91 } server;
92
93 uint32_t capabilities;
94 uint32_t max_xmit;
95
96 uint16_t mid;
97
98 struct smb_signing_state *signing;
99 struct smb_trans_enc_state *trans_enc;
100
101 struct tevent_req *read_braw_req;
102 } smb1;
103
104 struct {
105 struct {
106 uint32_t capabilities;
107 uint16_t security_mode;
108 struct GUID guid;
109 } client;
110
111 struct {
112 uint32_t capabilities;
113 uint16_t security_mode;
114 struct GUID guid;
115 uint32_t max_trans_size;
116 uint32_t max_read_size;
117 uint32_t max_write_size;
118 NTTIME system_time;
119 NTTIME start_time;
120 DATA_BLOB gss_blob;
121 } server;
122
123 uint64_t mid;
124 uint16_t cur_credits;
125 uint16_t max_credits;
126 } smb2;
127
128 struct smbXcli_session *sessions;
129 };
130
131 struct smb2cli_session {
132 uint64_t session_id;
133 uint16_t session_flags;
134 DATA_BLOB application_key;
135 DATA_BLOB signing_key;
136 bool should_sign;
137 bool should_encrypt;
138 DATA_BLOB encryption_key;
139 DATA_BLOB decryption_key;
140 uint64_t nonce_high;
141 uint64_t nonce_low;
142 uint16_t channel_sequence;
143 };
144
145 struct smbXcli_session {
146 struct smbXcli_session *prev, *next;
147 struct smbXcli_conn *conn;
148
149 struct {
150 uint16_t session_id;
151 DATA_BLOB application_key;
152 bool protected_key;
153 } smb1;
154
155 struct smb2cli_session *smb2;
156
157 struct {
158 DATA_BLOB signing_key;
159 } smb2_channel;
160
161 /*
162 * this should be a short term hack
163 * until the upper layers have implemented
164 * re-authentication.
165 */
166 bool disconnect_expired;
167 };
168
169 struct smbXcli_tcon {
170 struct {
171 uint16_t tcon_id;
172 uint16_t optional_support;
173 uint32_t maximal_access;
174 uint32_t guest_maximal_access;
175 char *service;
176 char *fs_type;
177 } smb1;
178
179 struct {
180 uint32_t tcon_id;
181 uint8_t type;
182 uint32_t flags;
183 uint32_t capabilities;
184 uint32_t maximal_access;
185 bool should_encrypt;
186 } smb2;
187 };
188
189 struct smbXcli_req_state {
190 struct tevent_context *ev;
191 struct smbXcli_conn *conn;
192 struct smbXcli_session *session; /* maybe NULL */
193 struct smbXcli_tcon *tcon; /* maybe NULL */
194
195 uint8_t length_hdr[4];
196
197 bool one_way;
198
199 uint8_t *inbuf;
200
201 struct {
202 /* Space for the header including the wct */
203 uint8_t hdr[HDR_VWV];
204
205 /*
206 * For normal requests, smb1cli_req_send chooses a mid.
207 * SecondaryV trans requests need to use the mid of the primary
208 * request, so we need a place to store it.
209 * Assume it is set if != 0.
210 */
211 uint16_t mid;
212
213 uint16_t *vwv;
214 uint8_t bytecount_buf[2];
215
216 #define MAX_SMB_IOV 10
217 /* length_hdr, hdr, words, byte_count, buffers */
218 struct iovec iov[1 + 3 + MAX_SMB_IOV];
219 int iov_count;
220
221 bool one_way_seqnum;
222 uint32_t seqnum;
223 struct tevent_req **chained_requests;
224
225 uint8_t recv_cmd;
226 NTSTATUS recv_status;
227 /* always an array of 3 talloc elements */
228 struct iovec *recv_iov;
229 } smb1;
230
231 struct {
232 const uint8_t *fixed;
233 uint16_t fixed_len;
234 const uint8_t *dyn;
235 uint32_t dyn_len;
236
237 uint8_t transform[SMB2_TF_HDR_SIZE];
238 uint8_t hdr[SMB2_HDR_BODY];
239 uint8_t pad[7]; /* padding space for compounding */
240
241 /*
242 * always an array of 3 talloc elements
243 * (without a SMB2_TRANSFORM header!)
244 *
245 * HDR, BODY, DYN
246 */
247 struct iovec *recv_iov;
248
249 /*
250 * the expected max for the response dyn_len
251 */
252 uint32_t max_dyn_len;
253
254 uint16_t credit_charge;
255
256 bool should_sign;
257 bool should_encrypt;
258 uint64_t encryption_session_id;
259
260 bool signing_skipped;
261 bool notify_async;
262 bool got_async;
263 } smb2;
264 };
265
266 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
267 {
268 /*
269 * NT_STATUS_OK, means we do not notify the callers
270 */
271 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
272
273 while (conn->sessions) {
274 conn->sessions->conn = NULL;
275 DLIST_REMOVE(conn->sessions, conn->sessions);
276 }
277
278 if (conn->smb1.trans_enc) {
279 TALLOC_FREE(conn->smb1.trans_enc);
280 }
281
282 return 0;
283 }
284
285 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
286 int fd,
287 const char *remote_name,
288 enum smb_signing_setting signing_state,
289 uint32_t smb1_capabilities,
290 struct GUID *client_guid,
291 uint32_t smb2_capabilities)
292 {
293 struct smbXcli_conn *conn = NULL;
294 void *ss = NULL;
295 struct sockaddr *sa = NULL;
296 socklen_t sa_length;
297 int ret;
298
299 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
300 if (!conn) {
301 return NULL;
302 }
303
304 conn->read_fd = fd;
305 conn->write_fd = dup(fd);
306 if (conn->write_fd == -1) {
307 goto error;
308 }
309
310 conn->remote_name = talloc_strdup(conn, remote_name);
311 if (conn->remote_name == NULL) {
312 goto error;
313 }
314
315
316 ss = (void *)&conn->local_ss;
317 sa = (struct sockaddr *)ss;
318 sa_length = sizeof(conn->local_ss);
319 ret = getsockname(fd, sa, &sa_length);
320 if (ret == -1) {
321 goto error;
322 }
323 ss = (void *)&conn->remote_ss;
324 sa = (struct sockaddr *)ss;
325 sa_length = sizeof(conn->remote_ss);
326 ret = getpeername(fd, sa, &sa_length);
327 if (ret == -1) {
328 goto error;
329 }
330
331 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
332 if (conn->outgoing == NULL) {
333 goto error;
334 }
335 conn->pending = NULL;
336
337 conn->protocol = PROTOCOL_NONE;
338
339 switch (signing_state) {
340 case SMB_SIGNING_OFF:
341 /* never */
342 conn->allow_signing = false;
343 conn->desire_signing = false;
344 conn->mandatory_signing = false;
345 break;
346 case SMB_SIGNING_DEFAULT:
347 case SMB_SIGNING_IF_REQUIRED:
348 /* if the server requires it */
349 conn->allow_signing = true;
350 conn->desire_signing = false;
351 conn->mandatory_signing = false;
352 break;
353 case SMB_SIGNING_REQUIRED:
354 /* always */
355 conn->allow_signing = true;
356 conn->desire_signing = true;
357 conn->mandatory_signing = true;
358 break;
359 }
360
361 conn->smb1.client.capabilities = smb1_capabilities;
362 conn->smb1.client.max_xmit = UINT16_MAX;
363
364 conn->smb1.capabilities = conn->smb1.client.capabilities;
365 conn->smb1.max_xmit = 1024;
366
367 conn->smb1.mid = 1;
368
369 /* initialise signing */
370 conn->smb1.signing = smb_signing_init(conn,
371 conn->allow_signing,
372 conn->desire_signing,
373 conn->mandatory_signing);
374 if (!conn->smb1.signing) {
375 goto error;
376 }
377
378 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
379 if (conn->mandatory_signing) {
380 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
381 }
382 if (client_guid) {
383 conn->smb2.client.guid = *client_guid;
384 }
385 conn->smb2.client.capabilities = smb2_capabilities;
386
387 conn->smb2.cur_credits = 1;
388 conn->smb2.max_credits = 0;
389
390 talloc_set_destructor(conn, smbXcli_conn_destructor);
391 return conn;
392
393 error:
394 if (conn->write_fd != -1) {
395 close(conn->write_fd);
396 }
397 TALLOC_FREE(conn);
398 return NULL;
399 }
400
401 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
402 {
403 if (conn == NULL) {
404 return false;
405 }
406
407 if (conn->read_fd == -1) {
408 return false;
409 }
410
411 return true;
412 }
413
414 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
415 {
416 return conn->protocol;
417 }
418
419 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
420 {
421 if (conn->protocol >= PROTOCOL_SMB2_02) {
422 return true;
423 }
424
425 if (conn->smb1.capabilities & CAP_UNICODE) {
426 return true;
427 }
428
429 return false;
430 }
431
432 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
433 {
434 set_socket_options(conn->read_fd, options);
435 }
436
437 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
438 {
439 return &conn->local_ss;
440 }
441
442 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
443 {
444 return &conn->remote_ss;
445 }
446
447 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
448 {
449 return conn->remote_name;
450 }
451
452 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
453 {
454 if (conn->protocol >= PROTOCOL_SMB2_02) {
455 /*
456 * TODO...
457 */
458 return 1;
459 }
460
461 return conn->smb1.server.max_mux;
462 }
463
464 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
465 {
466 if (conn->protocol >= PROTOCOL_SMB2_02) {
467 return conn->smb2.server.system_time;
468 }
469
470 return conn->smb1.server.system_time;
471 }
472
473 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
474 {
475 if (conn->protocol >= PROTOCOL_SMB2_02) {
476 return &conn->smb2.server.gss_blob;
477 }
478
479 return &conn->smb1.server.gss_blob;
480 }
481
482 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
483 {
484 if (conn->protocol >= PROTOCOL_SMB2_02) {
485 return &conn->smb2.server.guid;
486 }
487
488 return &conn->smb1.server.guid;
489 }
490
491 struct smbXcli_conn_samba_suicide_state {
492 struct smbXcli_conn *conn;
493 struct iovec iov;
494 uint8_t buf[9];
495 };
496
497 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
498
499 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
500 struct tevent_context *ev,
501 struct smbXcli_conn *conn,
502 uint8_t exitcode)
503 {
504 struct tevent_req *req, *subreq;
505 struct smbXcli_conn_samba_suicide_state *state;
506
507 req = tevent_req_create(mem_ctx, &state,
508 struct smbXcli_conn_samba_suicide_state);
509 if (req == NULL) {
510 return NULL;
511 }
512 state->conn = conn;
513 SIVAL(state->buf, 4, 0x74697865);
514 SCVAL(state->buf, 8, exitcode);
515 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
516
517 state->iov.iov_base = state->buf;
518 state->iov.iov_len = sizeof(state->buf);
519
520 subreq = writev_send(state, ev, conn->outgoing, conn->write_fd,
521 false, &state->iov, 1);
522 if (tevent_req_nomem(subreq, req)) {
523 return tevent_req_post(req, ev);
524 }
525 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
526 return req;
527 }
528
529 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
530 {
531 struct tevent_req *req = tevent_req_callback_data(
532 subreq, struct tevent_req);
533 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
534 req, struct smbXcli_conn_samba_suicide_state);
535 ssize_t nwritten;
536 int err;
537
538 nwritten = writev_recv(subreq, &err);
539 TALLOC_FREE(subreq);
540 if (nwritten == -1) {
541 NTSTATUS status = map_nt_error_from_unix_common(err);
542 smbXcli_conn_disconnect(state->conn, status);
543 return;
544 }
545 tevent_req_done(req);
546 }
547
548 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
549 {
550 return tevent_req_simple_recv_ntstatus(req);
551 }
552
553 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
554 uint8_t exitcode)
555 {
556 TALLOC_CTX *frame = talloc_stackframe();
557 struct tevent_context *ev;
558 struct tevent_req *req;
559 NTSTATUS status = NT_STATUS_NO_MEMORY;
560 bool ok;
561
562 if (smbXcli_conn_has_async_calls(conn)) {
563 /*
564 * Can't use sync call while an async call is in flight
565 */
566 status = NT_STATUS_INVALID_PARAMETER_MIX;
567 goto fail;
568 }
569 ev = samba_tevent_context_init(frame);
570 if (ev == NULL) {
571 goto fail;
572 }
573 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
574 if (req == NULL) {
575 goto fail;
576 }
577 ok = tevent_req_poll(req, ev);
578 if (!ok) {
579 status = map_nt_error_from_unix_common(errno);
580 goto fail;
581 }
582 status = smbXcli_conn_samba_suicide_recv(req);
583 fail:
584 TALLOC_FREE(frame);
585 return status;
586 }
587
588 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
589 {
590 return conn->smb1.capabilities;
591 }
592
593 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
594 {
595 return conn->smb1.max_xmit;
596 }
597
598 bool smb1cli_conn_req_possible(struct smbXcli_conn *conn)
599 {
600 size_t pending;
601 uint16_t possible = conn->smb1.server.max_mux;
602
603 pending = tevent_queue_length(conn->outgoing);
604 if (pending >= possible) {
605 return false;
606 }
607 pending += talloc_array_length(conn->pending);
608 if (pending >= possible) {
609 return false;
610 }
611
612 return true;
613 }
614
615 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
616 {
617 return conn->smb1.server.session_key;
618 }
619
620 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
621 {
622 return conn->smb1.server.challenge;
623 }
624
625 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
626 {
627 return conn->smb1.server.security_mode;
628 }
629
630 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
631 {
632 return conn->smb1.server.readbraw;
633 }
634
635 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
636 {
637 return conn->smb1.server.writebraw;
638 }
639
640 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
641 {
642 return conn->smb1.server.lockread;
643 }
644
645 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
646 {
647 return conn->smb1.server.writeunlock;
648 }
649
650 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
651 {
652 return conn->smb1.server.time_zone;
653 }
654
655 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
656 const DATA_BLOB user_session_key,
657 const DATA_BLOB response)
658 {
659 return smb_signing_activate(conn->smb1.signing,
660 user_session_key,
661 response);
662 }
663
664 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
665 const uint8_t *buf, uint32_t seqnum)
666 {
667 const uint8_t *hdr = buf + NBT_HDR_SIZE;
668 size_t len = smb_len_nbt(buf);
669
670 return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
671 }
672
673 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
674 {
675 return smb_signing_is_active(conn->smb1.signing);
676 }
677
678 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
679 struct smb_trans_enc_state *es)
680 {
681 /* Replace the old state, if any. */
682 if (conn->smb1.trans_enc) {
683 TALLOC_FREE(conn->smb1.trans_enc);
684 }
685 conn->smb1.trans_enc = es;
686 }
687
688 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
689 {
690 return common_encryption_on(conn->smb1.trans_enc);
691 }
692
693
694 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
695 {
696 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
697 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
698
699 if (NT_STATUS_IS_OK(status)) {
700 return NT_STATUS_OK;
701 }
702
703 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
704 return status;
705 }
706
707 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
708 }
709
710 /**
711 * Is the SMB command able to hold an AND_X successor
712 * @param[in] cmd The SMB command in question
713 * @retval Can we add a chained request after "cmd"?
714 */
715 bool smb1cli_is_andx_req(uint8_t cmd)
716 {
717 switch (cmd) {
718 case SMBtconX:
719 case SMBlockingX:
720 case SMBopenX:
721 case SMBreadX:
722 case SMBwriteX:
723 case SMBsesssetupX:
724 case SMBulogoffX:
725 case SMBntcreateX:
726 return true;
727 break;
728 default:
729 break;
730 }
731
732 return false;
733 }
734
735 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
736 {
737 size_t num_pending = talloc_array_length(conn->pending);
738 uint16_t result;
739
740 while (true) {
741 size_t i;
742
743 result = conn->smb1.mid++;
744 if ((result == 0) || (result == 0xffff)) {
745 continue;
746 }
747
748 for (i=0; i<num_pending; i++) {
749 if (result == smb1cli_req_mid(conn->pending[i])) {
750 break;
751 }
752 }
753
754 if (i == num_pending) {
755 return result;
756 }
757 }
758 }
759
760 void smbXcli_req_unset_pending(struct tevent_req *req)
761 {
762 struct smbXcli_req_state *state =
763 tevent_req_data(req,
764 struct smbXcli_req_state);
765 struct smbXcli_conn *conn = state->conn;
766 size_t num_pending = talloc_array_length(conn->pending);
767 size_t i;
768
769 if (state->smb1.mid != 0) {
770 /*
771 * This is a [nt]trans[2] request which waits
772 * for more than one reply.
773 */
774 return;
775 }
776
777 talloc_set_destructor(req, NULL);
778
779 if (num_pending == 1) {
780 /*
781 * The pending read_smb tevent_req is a child of
782 * conn->pending. So if nothing is pending anymore, we need to
783 * delete the socket read fde.
784 */
785 TALLOC_FREE(conn->pending);
786 conn->read_smb_req = NULL;
787 return;
788 }
789
790 for (i=0; i<num_pending; i++) {
791 if (req == conn->pending[i]) {
792 break;
793 }
794 }
795 if (i == num_pending) {
796 /*
797 * Something's seriously broken. Just returning here is the
798 * right thing nevertheless, the point of this routine is to
799 * remove ourselves from conn->pending.
800 */
801 return;
802 }
803
804 /*
805 * Remove ourselves from the conn->pending array
806 */
807 for (; i < (num_pending - 1); i++) {
808 conn->pending[i] = conn->pending[i+1];
809 }
810
811 /*
812 * No NULL check here, we're shrinking by sizeof(void *), and
813 * talloc_realloc just adjusts the size for this.
814 */
815 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
816 num_pending - 1);
817 return;
818 }
819
820 static int smbXcli_req_destructor(struct tevent_req *req)
821 {
822 struct smbXcli_req_state *state =
823 tevent_req_data(req,
824 struct smbXcli_req_state);
825
826 /*
827 * Make sure we really remove it from
828 * the pending array on destruction.
829 */
830 state->smb1.mid = 0;
831 smbXcli_req_unset_pending(req);
832 return 0;
833 }
834
835 static bool smb1cli_req_cancel(struct tevent_req *req);
836 static bool smb2cli_req_cancel(struct tevent_req *req);
837
838 static bool smbXcli_req_cancel(struct tevent_req *req)
839 {
840 struct smbXcli_req_state *state =
841 tevent_req_data(req,
842 struct smbXcli_req_state);
843
844 if (!smbXcli_conn_is_connected(state->conn)) {
845 return false;
846 }
847
848 if (state->conn->protocol == PROTOCOL_NONE) {
849 return false;
850 }
851
852 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
853 return smb2cli_req_cancel(req);
854 }
855
856 return smb1cli_req_cancel(req);
857 }
858
859 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
860
861 bool smbXcli_req_set_pending(struct tevent_req *req)
862 {
863 struct smbXcli_req_state *state =
864 tevent_req_data(req,
865 struct smbXcli_req_state);
866 struct smbXcli_conn *conn;
867 struct tevent_req **pending;
868 size_t num_pending;
869
870 conn = state->conn;
871
872 if (!smbXcli_conn_is_connected(conn)) {
873 return false;
874 }
875
876 num_pending = talloc_array_length(conn->pending);
877
878 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
879 num_pending+1);
880 if (pending == NULL) {
881 return false;
882 }
883 pending[num_pending] = req;
884 conn->pending = pending;
885 talloc_set_destructor(req, smbXcli_req_destructor);
886 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
887
888 if (!smbXcli_conn_receive_next(conn)) {
889 /*
890 * the caller should notify the current request
891 *
892 * And all other pending requests get notified
893 * by smbXcli_conn_disconnect().
894 */
895 smbXcli_req_unset_pending(req);
896 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
897 return false;
898 }
899
900 return true;
901 }
902
903 static void smbXcli_conn_received(struct tevent_req *subreq);
904
905 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
906 {
907 size_t num_pending = talloc_array_length(conn->pending);
908 struct tevent_req *req;
909 struct smbXcli_req_state *state;
910
911 if (conn->read_smb_req != NULL) {
912 return true;
913 }
914
915 if (num_pending == 0) {
916 if (conn->smb2.mid < UINT64_MAX) {
917 /* no more pending requests, so we are done for now */
918 return true;
919 }
920
921 /*
922 * If there are no more SMB2 requests possible,
923 * because we are out of message ids,
924 * we need to disconnect.
925 */
926 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
927 return true;
928 }
929
930 req = conn->pending[0];
931 state = tevent_req_data(req, struct smbXcli_req_state);
932
933 /*
934 * We're the first ones, add the read_smb request that waits for the
935 * answer from the server
936 */
937 conn->read_smb_req = read_smb_send(conn->pending,
938 state->ev,
939 conn->read_fd);
940 if (conn->read_smb_req == NULL) {
941 return false;
942 }
943 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
944 return true;
945 }
946
947 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
948 {
949 struct smbXcli_session *session;
950
951 tevent_queue_stop(conn->outgoing);
952
953 if (conn->read_fd != -1) {
954 close(conn->read_fd);
955 }
956 if (conn->write_fd != -1) {
957 close(conn->write_fd);
958 }
959 conn->read_fd = -1;
960 conn->write_fd = -1;
961
962 session = conn->sessions;
963 if (talloc_array_length(conn->pending) == 0) {
964 /*
965 * if we do not have pending requests
966 * there is no need to update the channel_sequence
967 */
968 session = NULL;
969 }
970 for (; session; session = session->next) {
971 smb2cli_session_increment_channel_sequence(session);
972 }
973
974 /*
975 * Cancel all pending requests. We do not do a for-loop walking
976 * conn->pending because that array changes in
977 * smbXcli_req_unset_pending.
978 */
979 while (talloc_array_length(conn->pending) > 0) {
980 struct tevent_req *req;
981 struct smbXcli_req_state *state;
982 struct tevent_req **chain;
983 size_t num_chained;
984 size_t i;
985
986 req = conn->pending[0];
987 state = tevent_req_data(req, struct smbXcli_req_state);
988
989 if (state->smb1.chained_requests == NULL) {
990 /*
991 * We're dead. No point waiting for trans2
992 * replies.
993 */
994 state->smb1.mid = 0;
995
996 smbXcli_req_unset_pending(req);
997
998 if (NT_STATUS_IS_OK(status)) {
999 /* do not notify the callers */
1000 continue;
1001 }
1002
1003 /*
1004 * we need to defer the callback, because we may notify
1005 * more then one caller.
1006 */
1007 tevent_req_defer_callback(req, state->ev);
1008 tevent_req_nterror(req, status);
1009 continue;
1010 }
1011
1012 chain = talloc_move(conn, &state->smb1.chained_requests);
1013 num_chained = talloc_array_length(chain);
1014
1015 for (i=0; i<num_chained; i++) {
1016 req = chain[i];
1017 state = tevent_req_data(req, struct smbXcli_req_state);
1018
1019 /*
1020 * We're dead. No point waiting for trans2
1021 * replies.
1022 */
1023 state->smb1.mid = 0;
1024
1025 smbXcli_req_unset_pending(req);
1026
1027 if (NT_STATUS_IS_OK(status)) {
1028 /* do not notify the callers */
1029 continue;
1030 }
1031
1032 /*
1033 * we need to defer the callback, because we may notify
1034 * more than one caller.
1035 */
1036 tevent_req_defer_callback(req, state->ev);
1037 tevent_req_nterror(req, status);
1038 }
1039 TALLOC_FREE(chain);
1040 }
1041 }
1042
1043 /*
1044 * Fetch a smb request's mid. Only valid after the request has been sent by
1045 * smb1cli_req_send().
1046 */
1047 uint16_t smb1cli_req_mid(struct tevent_req *req)
1048 {
1049 struct smbXcli_req_state *state =
1050 tevent_req_data(req,
1051 struct smbXcli_req_state);
1052
1053 if (state->smb1.mid != 0) {
1054 return state->smb1.mid;
1055 }
1056
1057 return SVAL(state->smb1.hdr, HDR_MID);
1058 }
1059
1060 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1061 {
1062 struct smbXcli_req_state *state =
1063 tevent_req_data(req,
1064 struct smbXcli_req_state);
1065
1066 state->smb1.mid = mid;
1067 }
1068
1069 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1070 {
1071 struct smbXcli_req_state *state =
1072 tevent_req_data(req,
1073 struct smbXcli_req_state);
1074
1075 return state->smb1.seqnum;
1076 }
1077
1078 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1079 {
1080 struct smbXcli_req_state *state =
1081 tevent_req_data(req,
1082 struct smbXcli_req_state);
1083
1084 state->smb1.seqnum = seqnum;
1085 }
1086
1087 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1088 {
1089 size_t result = 0;
1090 int i;
1091 for (i=0; i<count; i++) {
1092 result += iov[i].iov_len;
1093 }
1094 return result;
1095 }
1096
1097 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1098 const struct iovec *iov,
1099 int count)
1100 {
1101 size_t len = smbXcli_iov_len(iov, count);
1102 size_t copied;
1103 uint8_t *buf;
1104 int i;
1105
1106 buf = talloc_array(mem_ctx, uint8_t, len);
1107 if (buf == NULL) {
1108 return NULL;
1109 }
1110 copied = 0;
1111 for (i=0; i<count; i++) {
1112 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
1113 copied += iov[i].iov_len;
1114 }
1115 return buf;
1116 }
1117
1118 static void smb1cli_req_flags(enum protocol_types protocol,
1119 uint32_t smb1_capabilities,
1120 uint8_t smb_command,
1121 uint8_t additional_flags,
1122 uint8_t clear_flags,
1123 uint8_t *_flags,
1124 uint16_t additional_flags2,
1125 uint16_t clear_flags2,
1126 uint16_t *_flags2)
1127 {
1128 uint8_t flags = 0;
1129 uint16_t flags2 = 0;
1130
1131 if (protocol >= PROTOCOL_LANMAN1) {
1132 flags |= FLAG_CASELESS_PATHNAMES;
1133 flags |= FLAG_CANONICAL_PATHNAMES;
1134 }
1135
1136 if (protocol >= PROTOCOL_LANMAN2) {
1137 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1138 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1139 }
1140
1141 if (protocol >= PROTOCOL_NT1) {
1142 flags2 |= FLAGS2_IS_LONG_NAME;
1143
1144 if (smb1_capabilities & CAP_UNICODE) {
1145 flags2 |= FLAGS2_UNICODE_STRINGS;
1146 }
1147 if (smb1_capabilities & CAP_STATUS32) {
1148 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1149 }
1150 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1151 flags2 |= FLAGS2_EXTENDED_SECURITY;
1152 }
1153 }
1154
1155 flags |= additional_flags;
1156 flags &= ~clear_flags;
1157 flags2 |= additional_flags2;
1158 flags2 &= ~clear_flags2;
1159
1160 *_flags = flags;
1161 *_flags2 = flags2;
1162 }
1163
1164 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1165
1166 static bool smb1cli_req_cancel(struct tevent_req *req)
1167 {
1168 struct smbXcli_req_state *state =
1169 tevent_req_data(req,
1170 struct smbXcli_req_state);
1171 uint8_t flags;
1172 uint16_t flags2;
1173 uint32_t pid;
1174 uint16_t mid;
1175 struct tevent_req *subreq;
1176 NTSTATUS status;
1177
1178 flags = CVAL(state->smb1.hdr, HDR_FLG);
1179 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1180 pid = SVAL(state->smb1.hdr, HDR_PID);
1181 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1182 mid = SVAL(state->smb1.hdr, HDR_MID);
1183
1184 subreq = smb1cli_req_create(state, state->ev,
1185 state->conn,
1186 SMBntcancel,
1187 flags, 0,
1188 flags2, 0,
1189 0, /* timeout */
1190 pid,
1191 state->tcon,
1192 state->session,
1193 0, NULL, /* vwv */
1194 0, NULL); /* bytes */
1195 if (subreq == NULL) {
1196 return false;
1197 }
1198 smb1cli_req_set_mid(subreq, mid);
1199
1200 status = smb1cli_req_chain_submit(&subreq, 1);
1201 if (!NT_STATUS_IS_OK(status)) {
1202 TALLOC_FREE(subreq);
1203 return false;
1204 }
1205 smb1cli_req_set_mid(subreq, 0);
1206
1207 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1208
1209 return true;
1210 }
1211
1212 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1213 {
1214 /* we do not care about the result */
1215 TALLOC_FREE(subreq);
1216 }
1217
1218 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1219 struct tevent_context *ev,
1220 struct smbXcli_conn *conn,
1221 uint8_t smb_command,
1222 uint8_t additional_flags,
1223 uint8_t clear_flags,
1224 uint16_t additional_flags2,
1225 uint16_t clear_flags2,
1226 uint32_t timeout_msec,
1227 uint32_t pid,
1228 struct smbXcli_tcon *tcon,
1229 struct smbXcli_session *session,
1230 uint8_t wct, uint16_t *vwv,
1231 int iov_count,
1232 struct iovec *bytes_iov)
1233 {
1234 struct tevent_req *req;
1235 struct smbXcli_req_state *state;
1236 uint8_t flags = 0;
1237 uint16_t flags2 = 0;
1238 uint16_t uid = 0;
1239 uint16_t tid = 0;
1240
1241 if (iov_count > MAX_SMB_IOV) {
1242 /*
1243 * Should not happen :-)
1244 */
1245 return NULL;
1246 }
1247
1248 req = tevent_req_create(mem_ctx, &state,
1249 struct smbXcli_req_state);
1250 if (req == NULL) {
1251 return NULL;
1252 }
1253 state->ev = ev;
1254 state->conn = conn;
1255 state->session = session;
1256 state->tcon = tcon;
1257
1258 if (session) {
1259 uid = session->smb1.session_id;
1260 }
1261
1262 if (tcon) {
1263 tid = tcon->smb1.tcon_id;
1264 }
1265
1266 state->smb1.recv_cmd = 0xFF;
1267 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1268 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1269 if (state->smb1.recv_iov == NULL) {
1270 TALLOC_FREE(req);
1271 return NULL;
1272 }
1273
1274 smb1cli_req_flags(conn->protocol,
1275 conn->smb1.capabilities,
1276 smb_command,
1277 additional_flags,
1278 clear_flags,
1279 &flags,
1280 additional_flags2,
1281 clear_flags2,
1282 &flags2);
1283
1284 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1285 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1286 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1287 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1288 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1289 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1290 SSVAL(state->smb1.hdr, HDR_TID, tid);
1291 SSVAL(state->smb1.hdr, HDR_PID, pid);
1292 SSVAL(state->smb1.hdr, HDR_UID, uid);
1293 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1294 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1295
1296 state->smb1.vwv = vwv;
1297
1298 SSVAL(state->smb1.bytecount_buf, 0, smbXcli_iov_len(bytes_iov, iov_count));
1299
1300 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1301 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1302 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1303 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1304 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1305 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1306 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1307 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1308
1309 if (iov_count != 0) {
1310 memcpy(&state->smb1.iov[4], bytes_iov,
1311 iov_count * sizeof(*bytes_iov));
1312 }
1313 state->smb1.iov_count = iov_count + 4;
1314
1315 if (timeout_msec > 0) {
1316 struct timeval endtime;
1317
1318 endtime = timeval_current_ofs_msec(timeout_msec);
1319 if (!tevent_req_set_endtime(req, ev, endtime)) {
1320 return req;
1321 }
1322 }
1323
1324 switch (smb_command) {
1325 case SMBtranss:
1326 case SMBtranss2:
1327 case SMBnttranss:
1328 state->one_way = true;
1329 break;
1330 case SMBntcancel:
1331 state->one_way = true;
1332 state->smb1.one_way_seqnum = true;
1333 break;
1334 case SMBlockingX:
1335 if ((wct == 8) &&
1336 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1337 state->one_way = true;
1338 }
1339 break;
1340 }
1341
1342 return req;
1343 }
1344
1345 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1346 struct iovec *iov, int iov_count,
1347 uint32_t *seqnum,
1348 bool one_way_seqnum)
1349 {
1350 TALLOC_CTX *frame = NULL;
1351 uint8_t *buf;
1352
1353 /*
1354 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1355 * iovec directly. MD5Update would do that just fine.
1356 */
1357
1358 if (iov_count < 4) {
1359 return NT_STATUS_INVALID_PARAMETER_MIX;
1360 }
1361 if (iov[0].iov_len != NBT_HDR_SIZE) {
1362 return NT_STATUS_INVALID_PARAMETER_MIX;
1363 }
1364 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1365 return NT_STATUS_INVALID_PARAMETER_MIX;
1366 }
1367 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1368 return NT_STATUS_INVALID_PARAMETER_MIX;
1369 }
1370 if (iov[3].iov_len != sizeof(uint16_t)) {
1371 return NT_STATUS_INVALID_PARAMETER_MIX;
1372 }
1373
1374 frame = talloc_stackframe();
1375
1376 buf = smbXcli_iov_concat(frame, &iov[1], iov_count - 1);
1377 if (buf == NULL) {
1378 return NT_STATUS_NO_MEMORY;
1379 }
1380
1381 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1382 one_way_seqnum);
1383 smb_signing_sign_pdu(conn->smb1.signing,
1384 buf, talloc_get_size(buf),
1385 *seqnum);
1386 memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1387
1388 TALLOC_FREE(frame);
1389 return NT_STATUS_OK;
1390 }
1391
1392 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1393 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1394 TALLOC_CTX *tmp_mem,
1395 uint8_t *inbuf);
1396
1397 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1398 struct smbXcli_req_state *state,
1399 struct iovec *iov, int iov_count)
1400 {
1401 struct tevent_req *subreq;
1402 NTSTATUS status;
1403 uint8_t cmd;
1404 uint16_t mid;
1405
1406 if (!smbXcli_conn_is_connected(state->conn)) {
1407 return NT_STATUS_CONNECTION_DISCONNECTED;
1408 }
1409
1410 if (state->conn->protocol > PROTOCOL_NT1) {
1411 return NT_STATUS_REVISION_MISMATCH;
1412 }
1413
1414 if (iov_count < 4) {
1415 return NT_STATUS_INVALID_PARAMETER_MIX;
1416 }
1417 if (iov[0].iov_len != NBT_HDR_SIZE) {
1418 return NT_STATUS_INVALID_PARAMETER_MIX;
1419 }
1420 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1421 return NT_STATUS_INVALID_PARAMETER_MIX;
1422 }
1423 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1424 return NT_STATUS_INVALID_PARAMETER_MIX;
1425 }
1426 if (iov[3].iov_len != sizeof(uint16_t)) {
1427 return NT_STATUS_INVALID_PARAMETER_MIX;
1428 }
1429
1430 cmd = CVAL(iov[1].iov_base, HDR_COM);
1431 if (cmd == SMBreadBraw) {
1432 if (smbXcli_conn_has_async_calls(state->conn)) {
1433 return NT_STATUS_INVALID_PARAMETER_MIX;
1434 }
1435 state->conn->smb1.read_braw_req = req;
1436 }
1437
1438 if (state->smb1.mid != 0) {
1439 mid = state->smb1.mid;
1440 } else {
1441 mid = smb1cli_alloc_mid(state->conn);
1442 }
1443 SSVAL(iov[1].iov_base, HDR_MID, mid);
1444
1445 _smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
1446
1447 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1448 &state->smb1.seqnum,
1449 state->smb1.one_way_seqnum);
1450
1451 if (!NT_STATUS_IS_OK(status)) {
1452 return status;
1453 }
1454
1455 /*
1456 * If we supported multiple encrytion contexts
1457 * here we'd look up based on tid.
1458 */
1459 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1460 char *buf, *enc_buf;
1461
1462 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1463 if (buf == NULL) {
1464 return NT_STATUS_NO_MEMORY;
1465 }
1466 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1467 (char *)buf, &enc_buf);
1468 TALLOC_FREE(buf);
1469 if (!NT_STATUS_IS_OK(status)) {
1470 DEBUG(0, ("Error in encrypting client message: %s\n",
1471 nt_errstr(status)));
1472 return status;
1473 }
1474 buf = (char *)talloc_memdup(state, enc_buf,
1475 smb_len_nbt(enc_buf)+4);
1476 SAFE_FREE(enc_buf);
1477 if (buf == NULL) {
1478 return NT_STATUS_NO_MEMORY;
1479 }
1480 iov[0].iov_base = (void *)buf;
1481 iov[0].iov_len = talloc_get_size(buf);
1482 iov_count = 1;
1483 }
1484
1485 if (state->conn->dispatch_incoming == NULL) {
1486 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1487 }
1488
1489 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1490
1491 subreq = writev_send(state, state->ev, state->conn->outgoing,
1492 state->conn->write_fd, false, iov, iov_count);
1493 if (subreq == NULL) {
1494 return NT_STATUS_NO_MEMORY;
1495 }
1496 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1497 return NT_STATUS_OK;
1498 }
1499
1500 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1501 struct tevent_context *ev,
1502 struct smbXcli_conn *conn,
1503 uint8_t smb_command,
1504 uint8_t additional_flags,
1505 uint8_t clear_flags,
1506 uint16_t additional_flags2,
1507 uint16_t clear_flags2,
1508 uint32_t timeout_msec,
1509 uint32_t pid,
1510 struct smbXcli_tcon *tcon,
1511 struct smbXcli_session *session,
1512 uint8_t wct, uint16_t *vwv,
1513 uint32_t num_bytes,
1514 const uint8_t *bytes)
1515 {
1516 struct tevent_req *req;
1517 struct iovec iov;
1518 NTSTATUS status;
1519
1520 iov.iov_base = discard_const_p(void, bytes);
1521 iov.iov_len = num_bytes;
1522
1523 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1524 additional_flags, clear_flags,
1525 additional_flags2, clear_flags2,
1526 timeout_msec,
1527 pid, tcon, session,
1528 wct, vwv, 1, &iov);
1529 if (req == NULL) {
1530 return NULL;
1531 }
1532 if (!tevent_req_is_in_progress(req)) {
1533 return tevent_req_post(req, ev);
1534 }
1535 status = smb1cli_req_chain_submit(&req, 1);
1536 if (tevent_req_nterror(req, status)) {
1537 return tevent_req_post(req, ev);
1538 }
1539 return req;
1540 }
1541
1542 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1543 {
1544 struct tevent_req *req =
1545 tevent_req_callback_data(subreq,
1546 struct tevent_req);
1547 struct smbXcli_req_state *state =
1548 tevent_req_data(req,
1549 struct smbXcli_req_state);
1550 ssize_t nwritten;
1551 int err;
1552
1553 nwritten = writev_recv(subreq, &err);
1554 TALLOC_FREE(subreq);
1555 if (nwritten == -1) {
1556 NTSTATUS status = map_nt_error_from_unix_common(err);
1557 smbXcli_conn_disconnect(state->conn, status);
1558 return;
1559 }
1560
1561 if (state->one_way) {
1562 state->inbuf = NULL;
1563 tevent_req_done(req);
1564 return;
1565 }
1566
1567 if (!smbXcli_req_set_pending(req)) {
1568 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1569 return;
1570 }
1571 }
1572
1573 static void smbXcli_conn_received(struct tevent_req *subreq)
1574 {
1575 struct smbXcli_conn *conn =
1576 tevent_req_callback_data(subreq,
1577 struct smbXcli_conn);
1578 TALLOC_CTX *frame = talloc_stackframe();
1579 NTSTATUS status;
1580 uint8_t *inbuf;
1581 ssize_t received;
1582 int err;
1583
1584 if (subreq != conn->read_smb_req) {
1585 DEBUG(1, ("Internal error: cli_smb_received called with "
1586 "unexpected subreq\n"));
1587 smbXcli_conn_disconnect(conn, NT_STATUS_INTERNAL_ERROR);
1588 TALLOC_FREE(frame);
1589 return;
1590 }
1591 conn->read_smb_req = NULL;
1592
1593 received = read_smb_recv(subreq, frame, &inbuf, &err);
1594 TALLOC_FREE(subreq);
1595 if (received == -1) {
1596 status = map_nt_error_from_unix_common(err);
1597 smbXcli_conn_disconnect(conn, status);
1598 TALLOC_FREE(frame);
1599 return;
1600 }
1601
1602 status = conn->dispatch_incoming(conn, frame, inbuf);
1603 TALLOC_FREE(frame);
1604 if (NT_STATUS_IS_OK(status)) {
1605 /*
1606 * We should not do any more processing
1607 * as the dispatch function called
1608 * tevent_req_done().
1609 */
1610 return;
1611 }
1612
1613 if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1614 /*
1615 * We got an error, so notify all pending requests
1616 */
1617 smbXcli_conn_disconnect(conn, status);
1618 return;
1619 }
1620
1621 /*
1622 * We got NT_STATUS_RETRY, so we may ask for a
1623 * next incoming pdu.
1624 */
1625 if (!smbXcli_conn_receive_next(conn)) {
1626 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1627 }
1628 }
1629
1630 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1631 struct iovec **piov, int *pnum_iov)
1632 {
1633 struct iovec *iov;
1634 int num_iov;
1635 size_t buflen;
1636 size_t taken;
1637 size_t remaining;
1638 uint8_t *hdr;
1639 uint8_t cmd;
1640 uint32_t wct_ofs;
1641 NTSTATUS status;
1642 size_t min_size = MIN_SMB_SIZE;
1643
1644 buflen = smb_len_tcp(buf);
1645 taken = 0;
1646
1647 hdr = buf + NBT_HDR_SIZE;
1648
1649 status = smb1cli_pull_raw_error(hdr);
1650 if (NT_STATUS_IS_ERR(status)) {
1651 /*
1652 * This is an ugly hack to support OS/2
1653 * which skips the byte_count in the DATA block
1654 * on some error responses.
1655 *
1656 * See bug #9096
1657 */
1658 min_size -= sizeof(uint16_t);
1659 }
1660
1661 if (buflen < min_size) {
1662 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1663 }
1664
1665 /*
1666 * This returns iovec elements in the following order:
1667 *
1668 * - SMB header
1669 *
1670 * - Parameter Block
1671 * - Data Block
1672 *
1673 * - Parameter Block
1674 * - Data Block
1675 *
1676 * - Parameter Block
1677 * - Data Block
1678 */
1679 num_iov = 1;
1680
1681 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1682 if (iov == NULL) {
1683 return NT_STATUS_NO_MEMORY;
1684 }
1685 iov[0].iov_base = hdr;
1686 iov[0].iov_len = HDR_WCT;
1687 taken += HDR_WCT;
1688
1689 cmd = CVAL(hdr, HDR_COM);
1690 wct_ofs = HDR_WCT;
1691
1692 while (true) {
1693 size_t len = buflen - taken;
1694 struct iovec *cur;
1695 struct iovec *iov_tmp;
1696 uint8_t wct;
1697 uint32_t bcc_ofs;
1698 uint16_t bcc;
1699 size_t needed;
1700
1701 /*
1702 * we need at least WCT
1703 */
1704 needed = sizeof(uint8_t);
1705 if (len < needed) {
1706 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1707 __location__, (int)len, (int)needed));
1708 goto inval;
1709 }
1710
1711 /*
1712 * Now we check if the specified words are there
1713 */
1714 wct = CVAL(hdr, wct_ofs);
1715 needed += wct * sizeof(uint16_t);
1716 if (len < needed) {
1717 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1718 __location__, (int)len, (int)needed));
1719 goto inval;
1720 }
1721
1722 if ((num_iov == 1) &&
1723 (len == needed) &&
1724 NT_STATUS_IS_ERR(status))
1725 {
1726 /*
1727 * This is an ugly hack to support OS/2
1728 * which skips the byte_count in the DATA block
1729 * on some error responses.
1730 *
1731 * See bug #9096
1732 */
1733 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1734 num_iov + 2);
1735 if (iov_tmp == NULL) {
1736 TALLOC_FREE(iov);
1737 return NT_STATUS_NO_MEMORY;
1738 }
1739 iov = iov_tmp;
1740 cur = &iov[num_iov];
1741 num_iov += 2;
1742
1743 cur[0].iov_len = 0;
1744 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1745 cur[1].iov_len = 0;
1746 cur[1].iov_base = cur[0].iov_base;
1747
1748 taken += needed;
1749 break;
1750 }
1751
1752 /*
1753 * we need at least BCC
1754 */
1755 needed += sizeof(uint16_t);
1756 if (len < needed) {
1757 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1758 __location__, (int)len, (int)needed));
1759 goto inval;
1760 }
1761
1762 /*
1763 * Now we check if the specified bytes are there
1764 */
1765 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1766 bcc = SVAL(hdr, bcc_ofs);
1767 needed += bcc * sizeof(uint8_t);
1768 if (len < needed) {
1769 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1770 __location__, (int)len, (int)needed));
1771 goto inval;
1772 }
1773
1774 /*
1775 * we allocate 2 iovec structures for words and bytes
1776 */
1777 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1778 num_iov + 2);
1779 if (iov_tmp == NULL) {
1780 TALLOC_FREE(iov);
1781 return NT_STATUS_NO_MEMORY;
1782 }
1783 iov = iov_tmp;
1784 cur = &iov[num_iov];
1785 num_iov += 2;
1786
1787 cur[0].iov_len = wct * sizeof(uint16_t);
1788 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1789 cur[1].iov_len = bcc * sizeof(uint8_t);
1790 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1791
1792 taken += needed;
1793
1794 if (!smb1cli_is_andx_req(cmd)) {
1795 /*
1796 * If the current command does not have AndX chanining
1797 * we are done.
1798 */
1799 break;
1800 }
1801
1802 if (wct == 0 && bcc == 0) {
1803 /*
1804 * An empty response also ends the chain,
1805 * most likely with an error.
1806 */
1807 break;
1808 }
1809
1810 if (wct < 2) {
1811 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1812 __location__, (int)wct, (int)cmd));
1813 goto inval;
1814 }
1815 cmd = CVAL(cur[0].iov_base, 0);
1816 if (cmd == 0xFF) {
1817 /*
1818 * If it is the end of the chain we are also done.
1819 */
1820 break;
1821 }
1822 wct_ofs = SVAL(cur[0].iov_base, 2);
1823
1824 if (wct_ofs < taken) {
1825 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1826 }
1827 if (wct_ofs > buflen) {
1828 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1829 }
1830
1831 /*
1832 * we consumed everything up to the start of the next
1833 * parameter block.
1834 */
1835 taken = wct_ofs;
1836 }
1837
1838 remaining = buflen - taken;
1839
1840 if (remaining > 0 && num_iov >= 3) {
1841 /*
1842 * The last DATA block gets the remaining
1843 * bytes, this is needed to support
1844 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1845 */
1846 iov[num_iov-1].iov_len += remaining;
1847 }
1848
1849 *piov = iov;
1850 *pnum_iov = num_iov;
1851 return NT_STATUS_OK;
1852
1853 inval:
1854 TALLOC_FREE(iov);
1855 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1856 }
1857
1858 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1859 TALLOC_CTX *tmp_mem,
1860 uint8_t *inbuf)
1861 {
1862 struct tevent_req *req;
1863 struct smbXcli_req_state *state;
1864 NTSTATUS status;
1865 size_t num_pending;
1866 size_t i;
1867 uint8_t cmd;
1868 uint16_t mid;
1869 bool oplock_break;
1870 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1871 size_t len = smb_len_tcp(inbuf);
1872 struct iovec *iov = NULL;
1873 int num_iov = 0;
1874 struct tevent_req **chain = NULL;
1875 size_t num_chained = 0;
1876 size_t num_responses = 0;
1877
1878 if (conn->smb1.read_braw_req != NULL) {
1879 req = conn->smb1.read_braw_req;
1880 conn->smb1.read_braw_req = NULL;
1881 state = tevent_req_data(req, struct smbXcli_req_state);
1882
1883 smbXcli_req_unset_pending(req);
1884
1885 if (state->smb1.recv_iov == NULL) {
1886 /*
1887 * For requests with more than
1888 * one response, we have to readd the
1889 * recv_iov array.
1890 */
1891 state->smb1.recv_iov = talloc_zero_array(state,
1892 struct iovec,
1893 3);
1894 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1895 return NT_STATUS_OK;
1896 }
1897 }
1898
1899 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
1900 state->smb1.recv_iov[0].iov_len = len;
1901 ZERO_STRUCT(state->smb1.recv_iov[1]);
1902 ZERO_STRUCT(state->smb1.recv_iov[2]);
1903
1904 state->smb1.recv_cmd = SMBreadBraw;
1905 state->smb1.recv_status = NT_STATUS_OK;
1906 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1907
1908 tevent_req_done(req);
1909 return NT_STATUS_OK;
1910 }
1911
1912 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1913 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1914 DEBUG(10, ("Got non-SMB PDU\n"));
1915 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1916 }
1917
1918 /*
1919 * If we supported multiple encrytion contexts
1920 * here we'd look up based on tid.
1921 */
1922 if (common_encryption_on(conn->smb1.trans_enc)
1923 && (CVAL(inbuf, 0) == 0)) {
1924 uint16_t enc_ctx_num;
1925
1926 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1927 if (!NT_STATUS_IS_OK(status)) {
1928 DEBUG(10, ("get_enc_ctx_num returned %s\n",
1929 nt_errstr(status)));
1930 return status;
1931 }
1932
1933 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1934 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1935 enc_ctx_num,
1936 conn->smb1.trans_enc->enc_ctx_num));
1937 return NT_STATUS_INVALID_HANDLE;
1938 }
1939
1940 status = common_decrypt_buffer(conn->smb1.trans_enc,
1941 (char *)inbuf);
1942 if (!NT_STATUS_IS_OK(status)) {
1943 DEBUG(10, ("common_decrypt_buffer returned %s\n",
1944 nt_errstr(status)));
1945 return status;
1946 }
1947 inhdr = inbuf + NBT_HDR_SIZE;
1948 len = smb_len_nbt(inbuf);
1949 }
1950
1951 mid = SVAL(inhdr, HDR_MID);
1952 num_pending = talloc_array_length(conn->pending);
1953
1954 for (i=0; i<num_pending; i++) {
1955 if (mid == smb1cli_req_mid(conn->pending[i])) {
1956 break;
1957 }
1958 }
1959 if (i == num_pending) {
1960 /* Dump unexpected reply */
1961 return NT_STATUS_RETRY;
1962 }
1963
1964 oplock_break = false;
1965
1966 if (mid == 0xffff) {
1967 /*
1968 * Paranoia checks that this is really an oplock break request.
1969 */
1970 oplock_break = (len == 51); /* hdr + 8 words */
1971 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
1972 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
1973 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
1974 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
1975
1976 if (!oplock_break) {
1977 /* Dump unexpected reply */
1978 return NT_STATUS_RETRY;
1979 }
1980 }
1981
1982 req = conn->pending[i];
1983 state = tevent_req_data(req, struct smbXcli_req_state);
1984
1985 if (!oplock_break /* oplock breaks are not signed */
1986 && !smb_signing_check_pdu(conn->smb1.signing,
1987 inhdr, len, state->smb1.seqnum+1)) {
1988 DEBUG(10, ("cli_check_sign_mac failed\n"));
1989 return NT_STATUS_ACCESS_DENIED;
1990 }
1991
1992 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
1993 &iov, &num_iov);
1994 if (!NT_STATUS_IS_OK(status)) {
1995 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
1996 nt_errstr(status)));
1997 return status;
1998 }
1999
2000 cmd = CVAL(inhdr, HDR_COM);
2001 status = smb1cli_pull_raw_error(inhdr);
2002
2003 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
2004 (state->session != NULL) && state->session->disconnect_expired)
2005 {
2006 /*
2007 * this should be a short term hack
2008 * until the upper layers have implemented
2009 * re-authentication.
2010 */
2011 return status;
2012 }
2013
2014 if (state->smb1.chained_requests == NULL) {
2015 if (num_iov != 3) {
2016 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2017 }
2018
2019 smbXcli_req_unset_pending(req);
2020
2021 if (state->smb1.recv_iov == NULL) {
2022 /*
2023 * For requests with more than
2024 * one response, we have to readd the
2025 * recv_iov array.
2026 */
2027 state->smb1.recv_iov = talloc_zero_array(state,
2028 struct iovec,
2029 3);
2030 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2031 return NT_STATUS_OK;
2032 }
2033 }
2034
2035 state->smb1.recv_cmd = cmd;
2036 state->smb1.recv_status = status;
2037 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2038
2039 state->smb1.recv_iov[0] = iov[0];
2040 state->smb1.recv_iov[1] = iov[1];
2041 state->smb1.recv_iov[2] = iov[2];
2042
2043 if (talloc_array_length(conn->pending) == 0) {
2044 tevent_req_done(req);
2045 return NT_STATUS_OK;
2046 }
2047
2048 tevent_req_defer_callback(req, state->ev);
2049 tevent_req_done(req);
2050 return NT_STATUS_RETRY;
2051 }
2052
2053 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2054 num_chained = talloc_array_length(chain);
2055 num_responses = (num_iov - 1)/2;
2056
2057 if (num_responses > num_chained) {
2058 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2059 }
2060
2061 for (i=0; i<num_chained; i++) {
2062 size_t iov_idx = 1 + (i*2);
2063 struct iovec *cur = &iov[iov_idx];
2064 uint8_t *inbuf_ref;
2065
2066 req = chain[i];
2067 state = tevent_req_data(req, struct smbXcli_req_state);
2068
2069 smbXcli_req_unset_pending(req);
2070
2071 /*
2072 * as we finish multiple requests here
2073 * we need to defer the callbacks as
2074 * they could destroy our current stack state.
2075 */
2076 tevent_req_defer_callback(req, state->ev);
2077
2078 if (i >= num_responses) {
2079 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2080 continue;
2081 }
2082
2083 if (state->smb1.recv_iov == NULL) {
2084 /*
2085 * For requests with more than
2086 * one response, we have to readd the
2087 * recv_iov array.
2088 */
2089 state->smb1.recv_iov = talloc_zero_array(state,
2090 struct iovec,
2091 3);
2092 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2093 continue;
2094 }
2095 }
2096
2097 state->smb1.recv_cmd = cmd;
2098
2099 if (i == (num_responses - 1)) {
2100 /*
2101 * The last request in the chain gets the status
2102 */
2103 state->smb1.recv_status = status;
2104 } else {
2105 cmd = CVAL(cur[0].iov_base, 0);
2106 state->smb1.recv_status = NT_STATUS_OK;
2107 }
2108
2109 state->inbuf = inbuf;
2110
2111 /*
2112 * Note: here we use talloc_reference() in a way
2113 * that does not expose it to the caller.
2114 */
2115 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2116 if (tevent_req_nomem(inbuf_ref, req)) {
2117 continue;
2118 }
2119
2120 /* copy the related buffers */
2121 state->smb1.recv_iov[0] = iov[0];
2122 state->smb1.recv_iov[1] = cur[0];
2123 state->smb1.recv_iov[2] = cur[1];
2124
2125 tevent_req_done(req);
2126 }
2127
2128 return NT_STATUS_RETRY;
2129 }
2130
2131 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2132 TALLOC_CTX *mem_ctx,
2133 struct iovec **piov,
2134 uint8_t **phdr,
2135 uint8_t *pwct,
2136 uint16_t **pvwv,
2137 uint32_t *pvwv_offset,
2138 uint32_t *pnum_bytes,
2139 uint8_t **pbytes,
2140 uint32_t *pbytes_offset,
2141 uint8_t **pinbuf,
2142 const struct smb1cli_req_expected_response *expected,
2143 size_t num_expected)
2144 {
2145 struct smbXcli_req_state *state =
2146 tevent_req_data(req,
2147 struct smbXcli_req_state);
2148 NTSTATUS status = NT_STATUS_OK;
2149 struct iovec *recv_iov = NULL;
2150 uint8_t *hdr = NULL;
2151 uint8_t wct = 0;
2152 uint32_t vwv_offset = 0;
2153 uint16_t *vwv = NULL;
2154 uint32_t num_bytes = 0;
2155 uint32_t bytes_offset = 0;
2156 uint8_t *bytes = NULL;
2157 size_t i;
2158 bool found_status = false;
2159 bool found_size = false;
2160
2161 if (piov != NULL) {
2162 *piov = NULL;
2163 }
2164 if (phdr != NULL) {
2165 *phdr = 0;
2166 }
2167 if (pwct != NULL) {
2168 *pwct = 0;
2169 }
2170 if (pvwv != NULL) {
2171 *pvwv = NULL;
2172 }
2173 if (pvwv_offset != NULL) {
2174 *pvwv_offset = 0;
2175 }
2176 if (pnum_bytes != NULL) {
2177 *pnum_bytes = 0;
2178 }
2179 if (pbytes != NULL) {
2180 *pbytes = NULL;
2181 }
2182 if (pbytes_offset != NULL) {
2183 *pbytes_offset = 0;
2184 }
2185 if (pinbuf != NULL) {
2186 *pinbuf = NULL;
2187 }
2188
2189 if (state->inbuf != NULL) {
2190 recv_iov = state->smb1.recv_iov;
2191 state->smb1.recv_iov = NULL;
2192 if (state->smb1.recv_cmd != SMBreadBraw) {
2193 hdr = (uint8_t *)recv_iov[0].iov_base;
2194 wct = recv_iov[1].iov_len/2;
2195 vwv = (uint16_t *)recv_iov[1].iov_base;
2196 vwv_offset = PTR_DIFF(vwv, hdr);
2197 num_bytes = recv_iov[2].iov_len;
2198 bytes = (uint8_t *)recv_iov[2].iov_base;
2199 bytes_offset = PTR_DIFF(bytes, hdr);
2200 }
2201 }
2202
2203 if (tevent_req_is_nterror(req, &status)) {
2204 for (i=0; i < num_expected; i++) {
2205 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2206 found_status = true;
2207 break;
2208 }
2209 }
2210
2211 if (found_status) {
2212 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2213 }
2214
2215 return status;
2216 }
2217
2218 if (num_expected == 0) {
2219 found_status = true;
2220 found_size = true;
2221 }
2222
2223 status = state->smb1.recv_status;
2224
2225 for (i=0; i < num_expected; i++) {
2226 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2227 continue;
2228 }
2229
2230 found_status = true;
2231 if (expected[i].wct == 0) {
2232 found_size = true;
2233 break;
2234 }
2235
2236 if (expected[i].wct == wct) {
2237 found_size = true;
2238 break;
2239 }
2240 }
2241
2242 if (!found_status) {
2243 return status;
2244 }
2245
2246 if (!found_size) {
2247 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2248 }
2249
2250 if (piov != NULL) {
2251 *piov = talloc_move(mem_ctx, &recv_iov);
2252 }
2253
2254 if (phdr != NULL) {
2255 *phdr = hdr;
2256 }
2257 if (pwct != NULL) {
2258 *pwct = wct;
2259 }
2260 if (pvwv != NULL) {
2261 *pvwv = vwv;
2262 }
2263 if (pvwv_offset != NULL) {
2264 *pvwv_offset = vwv_offset;
2265 }
2266 if (pnum_bytes != NULL) {
2267 *pnum_bytes = num_bytes;
2268 }
2269 if (pbytes != NULL) {
2270 *pbytes = bytes;
2271 }
2272 if (pbytes_offset != NULL) {
2273 *pbytes_offset = bytes_offset;
2274 }
2275 if (pinbuf != NULL) {
2276 *pinbuf = state->inbuf;
2277 }
2278
2279 return status;
2280 }
2281
2282 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2283 {
2284 size_t wct_ofs;
2285 int i;
2286
2287 wct_ofs = HDR_WCT;
2288
2289 for (i=0; i<num_reqs; i++) {
2290 struct smbXcli_req_state *state;
2291 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2292 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2293 state->smb1.iov_count-2);
2294 wct_ofs = (wct_ofs + 3) & ~3;
2295 }
2296 return wct_ofs;
2297 }
2298
2299 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2300 {
2301 struct smbXcli_req_state *first_state =
2302 tevent_req_data(reqs[0],
2303 struct smbXcli_req_state);
2304 struct smbXcli_req_state *state;
2305 size_t wct_offset;
2306 size_t chain_padding = 0;
2307 int i, iovlen;
2308 struct iovec *iov = NULL;
2309 struct iovec *this_iov;
2310 NTSTATUS status;
2311 size_t nbt_len;
2312
2313 if (num_reqs == 1) {
2314 return smb1cli_req_writev_submit(reqs[0], first_state,
2315 first_state->smb1.iov,
2316 first_state->smb1.iov_count);
2317 }
2318
2319 iovlen = 0;
2320 for (i=0; i<num_reqs; i++) {
2321 if (!tevent_req_is_in_progress(reqs[i])) {
2322 return NT_STATUS_INTERNAL_ERROR;
2323 }
2324
2325 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2326
2327 if (state->smb1.iov_count < 4) {
2328 return NT_STATUS_INVALID_PARAMETER_MIX;
2329 }
2330
2331 if (i == 0) {
2332 /*
2333 * The NBT and SMB header
2334 */
2335 iovlen += 2;
2336 } else {
2337 /*
2338 * Chain padding
2339 */
2340 iovlen += 1;
2341 }
2342
2343 /*
2344 * words and bytes
2345 */
2346 iovlen += state->smb1.iov_count - 2;
2347 }
2348
2349 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2350 if (iov == NULL) {
2351 return NT_STATUS_NO_MEMORY;
2352 }
2353
2354 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2355 first_state, reqs, sizeof(*reqs) * num_reqs);
2356 if (first_state->smb1.chained_requests == NULL) {
2357 TALLOC_FREE(iov);
2358 return NT_STATUS_NO_MEMORY;
2359 }
2360
2361 wct_offset = HDR_WCT;
2362 this_iov = iov;
2363
2364 for (i=0; i<num_reqs; i++) {
2365 size_t next_padding = 0;
2366 uint16_t *vwv;
2367
2368 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2369
2370 if (i < num_reqs-1) {
2371 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2372 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2373 TALLOC_FREE(iov);
2374 TALLOC_FREE(first_state->smb1.chained_requests);
2375 return NT_STATUS_INVALID_PARAMETER_MIX;
2376 }
2377 }
2378
2379 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2380 state->smb1.iov_count-2) + 1;
2381 if ((wct_offset % 4) != 0) {
2382 next_padding = 4 - (wct_offset % 4);
2383 }
2384 wct_offset += next_padding;
2385 vwv = state->smb1.vwv;
2386
2387 if (i < num_reqs-1) {
2388 struct smbXcli_req_state *next_state =
2389 tevent_req_data(reqs[i+1],
2390 struct smbXcli_req_state);
2391 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2392 SCVAL(vwv+0, 1, 0);
2393 SSVAL(vwv+1, 0, wct_offset);
2394 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2395 /* properly end the chain */
2396 SCVAL(vwv+0, 0, 0xff);
2397 SCVAL(vwv+0, 1, 0xff);
2398 SSVAL(vwv+1, 0, 0);
2399 }
2400
2401 if (i == 0) {
2402 /*
2403 * The NBT and SMB header
2404 */
2405 this_iov[0] = state->smb1.iov[0];
2406 this_iov[1] = state->smb1.iov[1];
2407 this_iov += 2;
2408 } else {
2409 /*
2410 * This one is a bit subtle. We have to add
2411 * chain_padding bytes between the requests, and we
2412 * have to also include the wct field of the
2413 * subsequent requests. We use the subsequent header
2414 * for the padding, it contains the wct field in its
2415 * last byte.
2416 */
2417 this_iov[0].iov_len = chain_padding+1;
2418 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2419 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2420 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2421 this_iov += 1;
2422 }
2423
2424 /*
2425 * copy the words and bytes
2426 */
2427 memcpy(this_iov, state->smb1.iov+2,
2428 sizeof(struct iovec) * (state->smb1.iov_count-2));
2429 this_iov += state->smb1.iov_count - 2;
2430 chain_padding = next_padding;
2431 }
2432
2433 nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
2434 if (nbt_len > first_state->conn->smb1.max_xmit) {
2435 TALLOC_FREE(iov);
2436 TALLOC_FREE(first_state->smb1.chained_requests);
2437 return NT_STATUS_INVALID_PARAMETER_MIX;
2438 }
2439
2440 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2441 if (!NT_STATUS_IS_OK(status)) {
2442 TALLOC_FREE(iov);
2443 TALLOC_FREE(first_state->smb1.chained_requests);
2444 return status;
2445 }
2446
2447 return NT_STATUS_OK;
2448 }
2449
2450 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2451 {
2452 return ((tevent_queue_length(conn->outgoing) != 0)
2453 || (talloc_array_length(conn->pending) != 0));
2454 }
2455
2456 bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
2457 {
2458 uint16_t credits = 1;
2459
2460 if (conn->smb2.cur_credits == 0) {
2461 if (max_dyn_len != NULL) {
2462 *max_dyn_len = 0;
2463 }
2464 return false;
2465 }
2466
2467 if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2468 credits = conn->smb2.cur_credits;
2469 }
2470
2471 if (max_dyn_len != NULL) {
2472 *max_dyn_len = credits * 65536;
2473 }
2474
2475 return true;
2476 }
2477
2478 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2479 {
2480 return conn->smb2.server.capabilities;
2481 }
2482
2483 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2484 {
2485 return conn->smb2.server.security_mode;
2486 }
2487
2488 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2489 {
2490 return conn->smb2.server.max_trans_size;
2491 }
2492
2493 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2494 {
2495 return conn->smb2.server.max_read_size;
2496 }
2497
2498 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2499 {
2500 return conn->smb2.server.max_write_size;
2501 }
2502
2503 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2504 uint16_t max_credits)
2505 {
2506 conn->smb2.max_credits = max_credits;
2507 }
2508
2509 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2510
2511 static bool smb2cli_req_cancel(struct tevent_req *req)
2512 {
2513 struct smbXcli_req_state *state =
2514 tevent_req_data(req,
2515 struct smbXcli_req_state);
2516 uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2517 uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2518 uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
2519 struct smbXcli_tcon *tcon = state->tcon;
2520 struct smbXcli_session *session = state->session;
2521 uint8_t *fixed = state->smb2.pad;
2522 uint16_t fixed_len = 4;
2523 struct tevent_req *subreq;
2524 struct smbXcli_req_state *substate;
2525 NTSTATUS status;
2526
2527 SSVAL(fixed, 0, 0x04);
2528 SSVAL(fixed, 2, 0);
2529
2530 subreq = smb2cli_req_create(state, state->ev,
2531 state->conn,
2532 SMB2_OP_CANCEL,
2533 flags, 0,
2534 0, /* timeout */
2535 tcon, session,
2536 fixed, fixed_len,
2537 NULL, 0, 0);
2538 if (subreq == NULL) {
2539 return false;
2540 }
2541 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2542
2543 /*
2544 * clear everything but the SMB2_HDR_FLAG_ASYNC flag
2545 * e.g. if SMB2_HDR_FLAG_CHAINED is set we get INVALID_PARAMETER back
2546 */
2547 flags &= SMB2_HDR_FLAG_ASYNC;
2548
2549 if (flags & SMB2_HDR_FLAG_ASYNC) {
2550 mid = 0;
2551 }
2552
2553 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
2554 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2555 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
2556
2557 status = smb2cli_req_compound_submit(&subreq, 1);
2558 if (!NT_STATUS_IS_OK(status)) {
2559 TALLOC_FREE(subreq);
2560 return false;
2561 }
2562
2563 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2564
2565 return true;
2566 }
2567
2568 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2569 {
2570 /* we do not care about the result */
2571 TALLOC_FREE(subreq);
2572 }
2573
2574 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2575 struct tevent_context *ev,
2576 struct smbXcli_conn *conn,
2577 uint16_t cmd,
2578 uint32_t additional_flags,
2579 uint32_t clear_flags,
2580 uint32_t timeout_msec,
2581 struct smbXcli_tcon *tcon,
2582 struct smbXcli_session *session,
2583 const uint8_t *fixed,
2584 uint16_t fixed_len,
2585 const uint8_t *dyn,
2586 uint32_t dyn_len,
2587 uint32_t max_dyn_len)
2588 {
2589 struct tevent_req *req;
2590 struct smbXcli_req_state *state;
2591 uint32_t flags = 0;
2592 uint32_t tid = 0;
2593 uint64_t uid = 0;
2594 bool use_channel_sequence = false;
2595 uint16_t channel_sequence = 0;
2596
2597 req = tevent_req_create(mem_ctx, &state,
2598 struct smbXcli_req_state);
2599 if (req == NULL) {
2600 return NULL;
2601 }
2602
2603 state->ev = ev;
2604 state->conn = conn;
2605 state->session = session;
2606 state->tcon = tcon;
2607
2608 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2609 use_channel_sequence = true;
2610 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2611 use_channel_sequence = true;
2612 }
2613
2614 if (session) {
2615 uid = session->smb2->session_id;
2616
2617 if (use_channel_sequence) {
2618 channel_sequence = session->smb2->channel_sequence;
2619 }
2620
2621 state->smb2.should_sign = session->smb2->should_sign;
2622 state->smb2.should_encrypt = session->smb2->should_encrypt;
2623
2624 if (cmd == SMB2_OP_SESSSETUP &&
2625 session->smb2->signing_key.length != 0) {
2626 state->smb2.should_sign = true;
2627 }
2628
2629 if (cmd == SMB2_OP_SESSSETUP &&
2630 session->smb2_channel.signing_key.length == 0) {
2631 state->smb2.should_encrypt = false;
2632 }
2633 }
2634
2635 if (tcon) {
2636 tid = tcon->smb2.tcon_id;
2637
2638 if (tcon->smb2.should_encrypt) {
2639 state->smb2.should_encrypt = true;
2640 }
2641 }
2642
2643 if (state->smb2.should_encrypt) {
2644 state->smb2.should_sign = false;
2645 }
2646
2647 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2648 if (state->smb2.recv_iov == NULL) {
2649 TALLOC_FREE(req);
2650 return NULL;
2651 }
2652
2653 flags |= additional_flags;
2654 flags &= ~clear_flags;
2655
2656 state->smb2.fixed = fixed;
2657 state->smb2.fixed_len = fixed_len;
2658 state->smb2.dyn = dyn;
2659 state->smb2.dyn_len = dyn_len;
2660 state->smb2.max_dyn_len = max_dyn_len;
2661
2662 if (state->smb2.should_encrypt) {
2663 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2664 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2665 }
2666
2667 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
2668 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
2669 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
2670 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
2671 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
2672 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
2673 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
2674 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
2675
2676 switch (cmd) {
2677 case SMB2_OP_CANCEL:
2678 state->one_way = true;
2679 break;
2680 case SMB2_OP_BREAK:
2681 /*
2682 * If this is a dummy request, it will have
2683 * UINT64_MAX as message id.
2684 * If we send on break acknowledgement,
2685 * this gets overwritten later.
2686 */
2687 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2688 break;
2689 }
2690
2691 if (timeout_msec > 0) {
2692 struct timeval endtime;
2693
2694 endtime = timeval_current_ofs_msec(timeout_msec);
2695 if (!tevent_req_set_endtime(req, ev, endtime)) {
2696 return req;
2697 }
2698 }
2699
2700 return req;
2701 }
2702
2703 void smb2cli_req_set_notify_async(struct tevent_req *req)
2704 {
2705 struct smbXcli_req_state *state =
2706 tevent_req_data(req,
2707 struct smbXcli_req_state);
2708
2709 state->smb2.notify_async = true;
2710 }
2711
2712 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2713 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2714 TALLOC_CTX *tmp_mem,
2715 uint8_t *inbuf);
2716
2717 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2718 int num_reqs)
2719 {
2720 struct smbXcli_req_state *state;
2721 struct tevent_req *subreq;
2722 struct iovec *iov;
2723 int i, num_iov, nbt_len;
2724 int tf_iov = -1;
2725 const DATA_BLOB *encryption_key = NULL;
2726 uint64_t encryption_session_id = 0;
2727
2728 /*
2729 * 1 for the nbt length, optional TRANSFORM
2730 * per request: HDR, fixed, dyn, padding
2731 * -1 because the last one does not need padding
2732 */
2733
2734 iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
2735 if (iov == NULL) {
2736 return NT_STATUS_NO_MEMORY;
2737 }
2738
2739 num_iov = 1;
2740 nbt_len = 0;
2741
2742 /*
2743 * the session of the first request that requires encryption
2744 * specifies the encryption key.
2745 */
2746 for (i=0; i<num_reqs; i++) {
2747 if (!tevent_req_is_in_progress(reqs[i])) {
2748 return NT_STATUS_INTERNAL_ERROR;
2749 }
2750
2751 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2752
2753 if (!smbXcli_conn_is_connected(state->conn)) {
2754 return NT_STATUS_CONNECTION_DISCONNECTED;
2755 }
2756
2757 if ((state->conn->protocol != PROTOCOL_NONE) &&
2758 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2759 return NT_STATUS_REVISION_MISMATCH;
2760 }
2761
2762 if (state->session == NULL) {
2763 continue;
2764 }
2765
2766 if (!state->smb2.should_encrypt) {
2767 continue;
2768 }
2769
2770 encryption_key = &state->session->smb2->encryption_key;
2771 if (encryption_key->length == 0) {
2772 return NT_STATUS_INVALID_PARAMETER_MIX;
2773 }
2774
2775 encryption_session_id = state->session->smb2->session_id;
2776
2777 tf_iov = num_iov;
2778 iov[num_iov].iov_base = state->smb2.transform;
2779 iov[num_iov].iov_len = sizeof(state->smb2.transform);
2780 num_iov += 1;
2781
2782 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2783 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
2784 state->session->smb2->nonce_low);
2785 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
2786 state->session->smb2->nonce_high);
2787 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
2788 encryption_session_id);
2789
2790 state->session->smb2->nonce_low += 1;
2791 if (state->session->smb2->nonce_low == 0) {
2792 state->session->smb2->nonce_high += 1;
2793 state->session->smb2->nonce_low += 1;
2794 }
2795
2796 nbt_len += SMB2_TF_HDR_SIZE;
2797 break;
2798 }
2799
2800 for (i=0; i<num_reqs; i++) {
2801 int hdr_iov;
2802 size_t reqlen;
2803 bool ret;
2804 uint16_t opcode;
2805 uint64_t avail;
2806 uint16_t charge;
2807 uint16_t credits;
2808 uint64_t mid;
2809 const DATA_BLOB *signing_key = NULL;
2810
2811 if (!tevent_req_is_in_progress(reqs[i])) {
2812 return NT_STATUS_INTERNAL_ERROR;
2813 }
2814
2815 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2816
2817 if (!smbXcli_conn_is_connected(state->conn)) {
2818 return NT_STATUS_CONNECTION_DISCONNECTED;
2819 }
2820
2821 if ((state->conn->protocol != PROTOCOL_NONE) &&
2822 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2823 return NT_STATUS_REVISION_MISMATCH;
2824 }
2825
2826 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2827 if (opcode == SMB2_OP_CANCEL) {
2828 goto skip_credits;
2829 }
2830
2831 avail = UINT64_MAX - state->conn->smb2.mid;
2832 if (avail < 1) {
2833 return NT_STATUS_CONNECTION_ABORTED;
2834 }
2835
2836 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2837 uint32_t max_dyn_len = 1;
2838
2839 max_dyn_len = MAX(max_dyn_len, state->smb2.dyn_len);
2840 max_dyn_len = MAX(max_dyn_len, state->smb2.max_dyn_len);
2841
2842 charge = (max_dyn_len - 1)/ 65536 + 1;
2843 } else {
2844 charge = 1;
2845 }
2846
2847 charge = MAX(state->smb2.credit_charge, charge);
2848
2849 avail = MIN(avail, state->conn->smb2.cur_credits);
2850 if (avail < charge) {
2851 return NT_STATUS_INTERNAL_ERROR;
2852 }
2853
2854 credits = 0;
2855 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
2856 credits = state->conn->smb2.max_credits -
2857 state->conn->smb2.cur_credits;
2858 }
2859 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
2860 credits += 1;
2861 }
2862
2863 mid = state->conn->smb2.mid;
2864 state->conn->smb2.mid += charge;
2865 state->conn->smb2.cur_credits -= charge;
2866
2867 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2868 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
2869 }
2870 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
2871 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2872
2873 skip_credits:
2874 if (state->session && encryption_key == NULL) {
2875 /*
2876 * We prefer the channel signing key if it is
2877 * already there.
2878 */
2879 if (state->smb2.should_sign) {
2880 signing_key = &state->session->smb2_channel.signing_key;
2881 }
2882
2883 /*
2884 * If it is a channel binding, we already have the main
2885 * signing key and try that one.
2886 */
2887 if (signing_key && signing_key->length == 0) {
2888 signing_key = &state->session->smb2->signing_key;
2889 }
2890
2891 /*
2892 * If we do not have any session key yet, we skip the
2893 * signing of SMB2_OP_SESSSETUP requests.
2894 */
2895 if (signing_key && signing_key->length == 0) {
2896 signing_key = NULL;
2897 }
2898 }
2899
2900 hdr_iov = num_iov;
2901 iov[num_iov].iov_base = state->smb2.hdr;
2902 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
2903 num_iov += 1;
2904
2905 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2906 iov[num_iov].iov_len = state->smb2.fixed_len;
2907 num_iov += 1;
2908
2909 if (state->smb2.dyn != NULL) {
2910 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2911 iov[num_iov].iov_len = state->smb2.dyn_len;
2912 num_iov += 1;
2913 }
2914
2915 reqlen = sizeof(state->smb2.hdr);
2916 reqlen += state->smb2.fixed_len;
2917 reqlen += state->smb2.dyn_len;
2918
2919 if (i < num_reqs-1) {
2920 if ((reqlen % 8) > 0) {
2921 uint8_t pad = 8 - (reqlen % 8);
2922 iov[num_iov].iov_base = state->smb2.pad;
2923 iov[num_iov].iov_len = pad;
2924 num_iov += 1;
2925 reqlen += pad;
2926 }
2927 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
2928 }
2929
2930 state->smb2.encryption_session_id = encryption_session_id;
2931
2932 if (signing_key != NULL) {
2933 NTSTATUS status;
2934
2935 status = smb2_signing_sign_pdu(*signing_key,
2936 state->session->conn->protocol,
2937 &iov[hdr_iov], num_iov - hdr_iov);
2938 if (!NT_STATUS_IS_OK(status)) {
2939 return status;
2940 }
2941 }
2942
2943 nbt_len += reqlen;
2944
2945 ret = smbXcli_req_set_pending(reqs[i]);
2946 if (!ret) {
2947 return NT_STATUS_NO_MEMORY;
2948 }
2949 }
2950
2951 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
2952 _smb_setlen_tcp(state->length_hdr, nbt_len);
2953 iov[0].iov_base = state->length_hdr;
2954 iov[0].iov_len = sizeof(state->length_hdr);
2955
2956 if (encryption_key != NULL) {
2957 NTSTATUS status;
2958 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
2959 uint8_t *buf;
2960 int vi;
2961
2962 buf = talloc_array(iov, uint8_t, buflen);
2963 if (buf == NULL) {
2964 return NT_STATUS_NO_MEMORY;
2965 }
2966
2967 /*
2968 * We copy the buffers before encrypting them,
2969 * this is at least currently needed for the
2970 * to keep state->smb2.hdr.
2971 *
2972 * Also the callers may expect there buffers
2973 * to be const.
2974 */
2975 for (vi = tf_iov + 1; vi < num_iov; vi++) {
2976 struct iovec *v = &iov[vi];
2977 const uint8_t *o = (const uint8_t *)v->iov_base;
2978
2979 memcpy(buf, o, v->iov_len);
2980 v->iov_base = (void *)buf;
2981 buf += v->iov_len;
2982 }
2983
2984 status = smb2_signing_encrypt_pdu(*encryption_key,
2985 state->conn->protocol,
2986 &iov[tf_iov], num_iov - tf_iov);
2987 if (!NT_STATUS_IS_OK(status)) {
2988 return status;
2989 }
2990 }
2991
2992 if (state->conn->dispatch_incoming == NULL) {
2993 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
2994 }
2995
2996 subreq = writev_send(state, state->ev, state->conn->outgoing,
2997 state->conn->write_fd, false, iov, num_iov);
2998 if (subreq == NULL) {
2999 return NT_STATUS_NO_MEMORY;
3000 }
3001 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
3002 return NT_STATUS_OK;
3003 }
3004
3005 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
3006 {
3007 struct smbXcli_req_state *state =
3008 tevent_req_data(req,
3009 struct smbXcli_req_state);
3010
3011 state->smb2.credit_charge = charge;
3012 }
3013
3014 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
3015 struct tevent_context *ev,
3016 struct smbXcli_conn *conn,
3017 uint16_t cmd,
3018 uint32_t additional_flags,
3019 uint32_t clear_flags,
3020 uint32_t timeout_msec,
3021 struct smbXcli_tcon *tcon,
3022 struct smbXcli_session *session,
3023 const uint8_t *fixed,
3024 uint16_t fixed_len,
3025 const uint8_t *dyn,
3026 uint32_t dyn_len,
3027 uint32_t max_dyn_len)
3028 {
3029 struct tevent_req *req;
3030 NTSTATUS status;
3031
3032 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
3033 additional_flags, clear_flags,
3034 timeout_msec,
3035 tcon, session,
3036 fixed, fixed_len,
3037 dyn, dyn_len,
3038 max_dyn_len);
3039 if (req == NULL) {
3040 return NULL;
3041 }
3042 if (!tevent_req_is_in_progress(req)) {
3043 return tevent_req_post(req, ev);
3044 }
3045 status = smb2cli_req_compound_submit(&req, 1);
3046 if (tevent_req_nterror(req, status)) {
3047 return tevent_req_post(req, ev);
3048 }
3049 return req;
3050 }
3051
3052 static void smb2cli_req_writev_done(struct tevent_req *subreq)
3053 {
3054 struct tevent_req *req =
3055 tevent_req_callback_data(subreq,
3056 struct tevent_req);
3057 struct smbXcli_req_state *state =
3058 tevent_req_data(req,
3059 struct smbXcli_req_state);
3060 ssize_t nwritten;
3061 int err;
3062
3063 nwritten = writev_recv(subreq, &err);
3064 TALLOC_FREE(subreq);
3065 if (nwritten == -1) {
3066 /* here, we need to notify all pending requests */
3067 NTSTATUS status = map_nt_error_from_unix_common(err);
3068 smbXcli_conn_disconnect(state->conn, status);
3069 return;
3070 }
3071 }
3072
3073 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3074 uint8_t *buf,
3075 size_t buflen,
3076 TALLOC_CTX *mem_ctx,
3077 struct iovec **piov, int *pnum_iov)
3078 {
3079 struct iovec *iov;
3080 int num_iov = 0;
3081 size_t taken = 0;
3082 uint8_t *first_hdr = buf;
3083 size_t verified_buflen = 0;
3084 uint8_t *tf = NULL;
3085 size_t tf_len = 0;
3086
3087 iov = talloc_array(mem_ctx, struct iovec, num_iov);
3088 if (iov == NULL) {
3089 return NT_STATUS_NO_MEMORY;
3090 }
3091
3092 while (taken < buflen) {
3093 size_t len = buflen - taken;
3094 uint8_t *hdr = first_hdr + taken;
3095 struct iovec *cur;
3096 size_t full_size;
3097 size_t next_command_ofs;
3098 uint16_t body_size;
3099 struct iovec *iov_tmp;
3100
3101 if (verified_buflen > taken) {
3102 len = verified_buflen - taken;
3103 } else {
3104 tf = NULL;
3105 tf_len = 0;
3106 }
3107
3108 if (len < 4) {
3109 DEBUG(10, ("%d bytes left, expected at least %d\n",
3110 (int)len, 4));
3111 goto inval;
3112 }
3113 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3114 struct smbXcli_session *s;
3115 uint64_t uid;
3116 struct iovec tf_iov[2];
3117 size_t enc_len;
3118 NTSTATUS status;
3119
3120 if (len < SMB2_TF_HDR_SIZE) {
3121 DEBUG(10, ("%d bytes left, expected at least %d\n",
3122 (int)len, SMB2_TF_HDR_SIZE));
3123 goto inval;
3124 }
3125 tf = hdr;
3126 tf_len = SMB2_TF_HDR_SIZE;
3127 taken += tf_len;
3128
3129 hdr = first_hdr + taken;
3130 enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3131 uid = BVAL(tf, SMB2_TF_SESSION_ID);
3132
3133 if (len < SMB2_TF_HDR_SIZE + enc_len) {
3134 DEBUG(10, ("%d bytes left, expected at least %d\n",
3135 (int)len,
3136 (int)(SMB2_TF_HDR_SIZE + enc_len)));
3137 goto inval;
3138 }
3139
3140 s = conn->sessions;
3141 for (; s; s = s->next) {
3142 if (s->smb2->session_id != uid) {
3143 continue;
3144 }
3145 break;
3146 }
3147
3148 if (s == NULL) {
3149 DEBUG(10, ("unknown session_id %llu\n",
3150 (unsigned long long)uid));
3151 goto inval;
3152 }
3153
3154 tf_iov[0].iov_base = (void *)tf;
3155 tf_iov[0].iov_len = tf_len;
3156 tf_iov[1].iov_base = (void *)hdr;
3157 tf_iov[1].iov_len = enc_len;
3158
3159 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3160 conn->protocol,
3161 tf_iov, 2);
3162 if (!NT_STATUS_IS_OK(status)) {
3163 TALLOC_FREE(iov);
3164 return status;
3165 }
3166
3167 verified_buflen = taken + enc_len;
3168 len = enc_len;
3169 }
3170
3171 /*
3172 * We need the header plus the body length field
3173 */
3174
3175 if (len < SMB2_HDR_BODY + 2) {
3176 DEBUG(10, ("%d bytes left, expected at least %d\n",
3177 (int)len, SMB2_HDR_BODY));
3178 goto inval;
3179 }
3180 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3181 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3182 IVAL(hdr, 0)));
3183 goto inval;
3184 }
3185 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3186 DEBUG(10, ("Got HDR len %d, expected %d\n",
3187 SVAL(hdr, 4), SMB2_HDR_BODY));
3188 goto inval;
3189 }
3190
3191 full_size = len;
3192 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3193 body_size = SVAL(hdr, SMB2_HDR_BODY);
3194
3195 if (next_command_ofs != 0) {
3196 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3197 goto inval;
3198 }
3199 if (next_command_ofs > full_size) {
3200 goto inval;
3201 }
3202 full_size = next_command_ofs;
3203 }
3204 if (body_size < 2) {
3205 goto inval;
3206 }
3207 body_size &= 0xfffe;
3208
3209 if (body_size > (full_size - SMB2_HDR_BODY)) {
3210 goto inval;
3211 }
3212
3213 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3214 num_iov + 4);
3215 if (iov_tmp == NULL) {
3216 TALLOC_FREE(iov);
3217 return NT_STATUS_NO_MEMORY;
3218 }
3219 iov = iov_tmp;
3220 cur = &iov[num_iov];
3221 num_iov += 4;
3222
3223 cur[0].iov_base = tf;
3224 cur[0].iov_len = tf_len;
3225 cur[1].iov_base = hdr;
3226 cur[1].iov_len = SMB2_HDR_BODY;
3227 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3228 cur[2].iov_len = body_size;
3229 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3230 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3231
3232 taken += full_size;
3233 }
3234
3235 *piov = iov;
3236 *pnum_iov = num_iov;
3237 return NT_STATUS_OK;
3238
3239 inval:
3240 TALLOC_FREE(iov);
3241 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3242 }
3243
3244 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3245 uint64_t mid)
3246 {
3247 size_t num_pending = talloc_array_length(conn->pending);
3248 size_t i;
3249
3250 for (i=0; i<num_pending; i++) {
3251 struct tevent_req *req = conn->pending[i];
3252 struct smbXcli_req_state *state =
3253 tevent_req_data(req,
3254 struct smbXcli_req_state);
3255
3256 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3257 return req;
3258 }
3259 }
3260 return NULL;
3261 }
3262
3263 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3264 TALLOC_CTX *tmp_mem,
3265 uint8_t *inbuf)
3266 {
3267 struct tevent_req *req;
3268 struct smbXcli_req_state *state = NULL;
3269 struct iovec *iov;
3270 int i, num_iov;
3271 NTSTATUS status;
3272 bool defer = true;
3273 struct smbXcli_session *last_session = NULL;
3274 size_t inbuf_len = smb_len_tcp(inbuf);
3275
3276 status = smb2cli_inbuf_parse_compound(conn,
3277 inbuf + NBT_HDR_SIZE,
3278 inbuf_len,
3279 tmp_mem,
3280 &iov, &num_iov);
3281 if (!NT_STATUS_IS_OK(status)) {
3282 return status;
3283 }
3284
3285 for (i=0; i<num_iov; i+=4) {
3286 uint8_t *inbuf_ref = NULL;
3287 struct iovec *cur = &iov[i];
3288 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3289 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3290 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3291 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3292 uint16_t req_opcode;
3293 uint32_t req_flags;
3294 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3295 uint32_t new_credits;
3296 struct smbXcli_session *session = NULL;
3297 const DATA_BLOB *signing_key = NULL;
3298 bool was_encrypted = false;
3299
3300 new_credits = conn->smb2.cur_credits;
3301 new_credits += credits;
3302 if (new_credits > UINT16_MAX) {
3303 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3304 }
3305 conn->smb2.cur_credits += credits;
3306
3307 req = smb2cli_conn_find_pending(conn, mid);
3308 if (req == NULL) {
3309 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3310 }
3311 state = tevent_req_data(req, struct smbXcli_req_state);
3312
3313 state->smb2.got_async = false;
3314
3315 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3316 if (opcode != req_opcode) {
3317 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3318 }
3319 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3320
3321 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3322 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3323 }
3324
3325 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3326 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3327 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3328 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3329
3330 /*
3331 * async interim responses are not signed,
3332 * even if the SMB2_HDR_FLAG_SIGNED flag
3333 * is set.
3334 */
3335 req_flags |= SMB2_HDR_FLAG_ASYNC;
3336 SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
3337 SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
3338
3339 if (state->smb2.notify_async) {
3340 state->smb2.got_async = true;
3341 tevent_req_defer_callback(req, state->ev);
3342 tevent_req_notify_callback(req);
3343 }
3344 continue;
3345 }
3346
3347 session = state->session;
3348 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3349 session = last_session;
3350 }
3351 last_session = session;
3352
3353 if (state->smb2.should_sign) {
3354 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3355 return NT_STATUS_ACCESS_DENIED;
3356 }
3357 }
3358
3359 if (flags & SMB2_HDR_FLAG_SIGNED) {
3360 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3361
3362 if (session == NULL) {
3363 struct smbXcli_session *s;
3364
3365 s = state->conn->sessions;
3366 for (; s; s = s->next) {
3367 if (s->smb2->session_id != uid) {
3368 continue;
3369 }
3370
3371 session = s;
3372 break;
3373 }
3374 }
3375
3376 if (session == NULL) {
3377 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3378 }
3379
3380 last_session = session;
3381 signing_key = &session->smb2_channel.signing_key;
3382 }
3383
3384 if (opcode == SMB2_OP_SESSSETUP) {
3385 /*
3386 * We prefer the channel signing key, if it is
3387 * already there.
3388 *
3389 * If we do not have a channel signing key yet,
3390 * we try the main signing key, if it is not
3391 * the final response.
3392 */
3393 if (signing_key && signing_key->length == 0 &&
3394 !NT_STATUS_IS_OK(status)) {
3395 signing_key = &session->smb2->signing_key;
3396 }
3397
3398 if (signing_key && signing_key->length == 0) {
3399 /*
3400 * If we do not have a session key to
3401 * verify the signature, we defer the
3402 * signing check to the caller.
3403 *
3404 * The caller gets NT_STATUS_OK, it
3405 * has to call
3406 * smb2cli_session_set_session_key()
3407 * or
3408 * smb2cli_session_set_channel_key()
3409 * which will check the signature
3410 * with the channel signing key.
3411 */
3412 signing_key = NULL;
3413 }
3414 }
3415
3416 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3417 const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3418 uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3419
3420 /*
3421 * If the response was encrypted in a SMB2_TRANSFORM
3422 * pdu, which belongs to the correct session,
3423 * we do not need to do signing checks
3424 *
3425 * It could be the session the response belongs to
3426 * or the session that was used to encrypt the
3427 * SMB2_TRANSFORM request.
3428 */
3429 if ((session && session->smb2->session_id == uid) ||
3430 (state->smb2.encryption_session_id == uid)) {
3431 signing_key = NULL;
3432 was_encrypted = true;
3433 }
3434 }
3435
3436 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3437 /*
3438 * if the server returns NT_STATUS_USER_SESSION_DELETED
3439 * the response is not signed and we should
3440 * propagate the NT_STATUS_USER_SESSION_DELETED
3441 * status to the caller.
3442 */
3443 state->smb2.signing_skipped = true;
3444 signing_key = NULL;
3445 }
3446
3447 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3448 /*
3449 * if the server returns
3450 * NT_STATUS_INVALID_PARAMETER
3451 * the response might not be encrypted.
3452 */
3453 if (state->smb2.should_encrypt && !was_encrypted) {
3454 state->smb2.signing_skipped = true;
3455 signing_key = NULL;
3456 }
3457 }
3458
3459 if (state->smb2.should_encrypt && !was_encrypted) {
3460 if (!state->smb2.signing_skipped) {
3461 return NT_STATUS_ACCESS_DENIED;
3462 }
3463 }
3464
3465 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3466 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3467 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3468 /*
3469 * if the server returns
3470 * NT_STATUS_NETWORK_NAME_DELETED
3471 * NT_STATUS_FILE_CLOSED
3472 * NT_STATUS_INVALID_PARAMETER
3473 * the response might not be signed
3474 * as this happens before the signing checks.
3475 *
3476 * If server echos the signature (or all zeros)
3477 * we should report the status from the server
3478 * to the caller.
3479 */
3480 if (signing_key) {
3481 int cmp;
3482
3483 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3484 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3485 16);
3486 if (cmp == 0) {
3487 state->smb2.signing_skipped = true;
3488 signing_key = NULL;
3489 }
3490 }
3491 if (signing_key) {
3492 int cmp;
3493 static const uint8_t zeros[16];
3494
3495 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3496 zeros,
3497 16);
3498 if (cmp == 0) {
3499 state->smb2.signing_skipped = true;
3500 signing_key = NULL;
3501 }
3502 }
3503 }
3504
3505 if (signing_key) {
3506 status = smb2_signing_check_pdu(*signing_key,
3507 state->conn->protocol,
3508 &cur[1], 3);
3509 if (!NT_STATUS_IS_OK(status)) {
3510 /*
3511 * If the signing check fails, we disconnect
3512 * the connection.
3513 */
3514 return status;
3515 }
3516 }
3517
3518 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
3519 (session != NULL) && session->disconnect_expired)
3520 {
3521 /*
3522 * this should be a short term hack
3523 * until the upper layers have implemented
3524 * re-authentication.
3525 */
3526 return status;
3527 }
3528
3529 smbXcli_req_unset_pending(req);
3530
3531 /*
3532 * There might be more than one response
3533 * we need to defer the notifications
3534 */
3535 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3536 defer = false;
3537 }
3538
3539 if (defer) {
3540 tevent_req_defer_callback(req, state->ev);
3541 }
3542
3543 /*
3544 * Note: here we use talloc_reference() in a way
3545 * that does not expose it to the caller.
3546 */
3547 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3548 if (tevent_req_nomem(inbuf_ref, req)) {
3549 continue;
3550 }
3551
3552 /* copy the related buffers */
3553 state->smb2.recv_iov[0] = cur[1];
3554 state->smb2.recv_iov[1] = cur[2];
3555 state->smb2.recv_iov[2] = cur[3];
3556
3557 tevent_req_done(req);
3558 }
3559
3560 if (defer) {
3561 return NT_STATUS_RETRY;
3562 }
3563
3564 return NT_STATUS_OK;
3565 }
3566
3567 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3568 struct iovec **piov,
3569 const struct smb2cli_req_expected_response *expected,
3570 size_t num_expected)
3571 {
3572 struct smbXcli_req_state *state =
3573 tevent_req_data(req,
3574 struct smbXcli_req_state);
3575 NTSTATUS status;
3576 size_t body_size;
3577 bool found_status = false;
3578 bool found_size = false;
3579 size_t i;
3580
3581 if (piov != NULL) {
3582 *piov = NULL;
3583 }
3584
3585 if (state->smb2.got_async) {
3586 return STATUS_PENDING;
3587 }
3588
3589 if (tevent_req_is_nterror(req, &status)) {
3590 for (i=0; i < num_expected; i++) {
3591 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3592 found_status = true;
3593 break;
3594 }
3595 }
3596
3597 if (found_status) {
3598 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3599 }
3600
3601 return status;
3602 }
3603
3604 if (num_expected == 0) {
3605 found_status = true;
3606 found_size = true;
3607 }
3608
3609 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3610 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3611
3612 for (i=0; i < num_expected; i++) {
3613 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3614 continue;
3615 }
3616
3617 found_status = true;
3618 if (expected[i].body_size == 0) {
3619 found_size = true;
3620 break;
3621 }
3622
3623 if (expected[i].body_size == body_size) {
3624 found_size = true;
3625 break;
3626 }
3627 }
3628
3629 if (!found_status) {
3630 return status;
3631 }
3632
3633 if (state->smb2.signing_skipped) {
3634 if (num_expected > 0) {
3635 return NT_STATUS_ACCESS_DENIED;
3636 }
3637 if (!NT_STATUS_IS_ERR(status)) {
3638 return NT_STATUS_ACCESS_DENIED;
3639 }
3640 }
3641
3642 if (!found_size) {
3643 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3644 }
3645
3646 if (piov != NULL) {
3647 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3648 }
3649
3650 return status;
3651 }
3652
3653 static const struct {
3654 enum protocol_types proto;
3655 const char *smb1_name;
3656 } smb1cli_prots[] = {
3657 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
3658 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
3659 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
3660 {PROTOCOL_LANMAN1, "LANMAN1.0"},
3661 {PROTOCOL_LANMAN2, "LM1.2X002"},
3662 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
3663 {PROTOCOL_LANMAN2, "LANMAN2.1"},
3664 {PROTOCOL_LANMAN2, "Samba"},
3665 {PROTOCOL_NT1, "NT LANMAN 1.0"},
3666 {PROTOCOL_NT1, "NT LM 0.12"},
3667 {PROTOCOL_SMB2_02, "SMB 2.002"},
3668 {PROTOCOL_SMB2_10, "SMB 2.???"},
3669 };
3670
3671 static const struct {
3672 enum protocol_types proto;
3673 uint16_t smb2_dialect;
3674 } smb2cli_prots[] = {
3675 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
3676 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
3677 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
3678 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
3679 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
3680 };
3681
3682 struct smbXcli_negprot_state {
3683 struct smbXcli_conn *conn;
3684 struct tevent_context *ev;
3685 uint32_t timeout_msec;
3686 enum protocol_types min_protocol;
3687 enum protocol_types max_protocol;
3688
3689 struct {
3690 uint8_t fixed[36];
3691 uint8_t dyn[ARRAY_SIZE(smb2cli_prots)*2];
3692 } smb2;
3693 };
3694
3695 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3696 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3697 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3698 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3699 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3700 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3701 TALLOC_CTX *frame,
3702 uint8_t *inbuf);
3703
3704 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3705 struct tevent_context *ev,
3706 struct smbXcli_conn *conn,
3707 uint32_t timeout_msec,
3708 enum protocol_types min_protocol,
3709 enum protocol_types max_protocol)
3710 {
3711 struct tevent_req *req, *subreq;
3712 struct smbXcli_negprot_state *state;
3713
3714 req = tevent_req_create(mem_ctx, &state,
3715 struct smbXcli_negprot_state);
3716 if (req == NULL) {
3717 return NULL;
3718 }
3719 state->conn = conn;
3720 state->ev = ev;
3721 state->timeout_msec = timeout_msec;
3722 state->min_protocol = min_protocol;
3723 state->max_protocol = max_protocol;
3724
3725 if (min_protocol == PROTOCOL_NONE) {
3726 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3727 return tevent_req_post(req, ev);
3728 }
3729
3730 if (max_protocol == PROTOCOL_NONE) {
3731 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3732 return tevent_req_post(req, ev);
3733 }
3734
3735 if (min_protocol > max_protocol) {
3736 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3737 return tevent_req_post(req, ev);
3738 }
3739
3740 if ((min_protocol < PROTOCOL_SMB2_02) &&
3741 (max_protocol < PROTOCOL_SMB2_02)) {
3742 /*
3743 * SMB1 only...
3744 */
3745 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3746
3747 subreq = smbXcli_negprot_smb1_subreq(state);
3748 if (tevent_req_nomem(subreq, req)) {
3749 return tevent_req_post(req, ev);
3750 }
3751 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3752 return req;
3753 }
3754
3755 if ((min_protocol >= PROTOCOL_SMB2_02) &&
3756 (max_protocol >= PROTOCOL_SMB2_02)) {
3757 /*
3758 * SMB2 only...
3759 */
3760 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3761
3762 subreq = smbXcli_negprot_smb2_subreq(state);
3763 if (tevent_req_nomem(subreq, req)) {
3764 return tevent_req_post(req, ev);
3765 }
3766 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3767 return req;
3768 }
3769
3770 /*
3771 * We send an SMB1 negprot with the SMB2 dialects
3772 * and expect a SMB1 or a SMB2 response.
3773 *
3774 * smbXcli_negprot_dispatch_incoming() will fix the
3775 * callback to match protocol of the response.
3776 */
3777 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
3778
3779 subreq = smbXcli_negprot_smb1_subreq(state);
3780 if (tevent_req_nomem(subreq, req)) {
3781 return tevent_req_post(req, ev);
3782 }
3783 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
3784 return req;
3785 }
3786
3787 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
3788 {
3789 struct tevent_req *req =
3790 tevent_req_callback_data(subreq,
3791 struct tevent_req);
3792 NTSTATUS status;
3793
3794 /*
3795 * we just want the low level error
3796 */
3797 status = tevent_req_simple_recv_ntstatus(subreq);
3798 TALLOC_FREE(subreq);
3799 if (tevent_req_nterror(req, status)) {
3800 return;
3801 }
3802
3803 /* this should never happen */
3804 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
3805 }
3806
3807 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
3808 {
3809 size_t i;
3810 DATA_BLOB bytes = data_blob_null;
3811 uint8_t flags;
3812 uint16_t flags2;
3813
3814 /* setup the protocol strings */
3815 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3816 uint8_t c = 2;
3817 bool ok;
3818
3819 if (smb1cli_prots[i].proto < state->min_protocol) {
3820 continue;
3821 }
3822
3823 if (smb1cli_prots[i].proto > state->max_protocol) {
3824 continue;
3825 }
3826
3827 ok = data_blob_append(state, &bytes, &c, sizeof(c));
3828 if (!ok) {
3829 return NULL;
3830 }
3831
3832 /*
3833 * We now it is already ascii and
3834 * we want NULL termination.
3835 */
3836 ok = data_blob_append(state, &bytes,
3837 smb1cli_prots[i].smb1_name,
3838 strlen(smb1cli_prots[i].smb1_name)+1);
3839 if (!ok) {
3840 return NULL;
3841 }
3842 }
3843
3844 smb1cli_req_flags(state->max_protocol,
3845 state->conn->smb1.client.capabilities,
3846 SMBnegprot,
3847 0, 0, &flags,
3848 0, 0, &flags2);
3849
3850 return smb1cli_req_send(state, state->ev, state->conn,
3851 SMBnegprot,
3852 flags, ~flags,
3853 flags2, ~flags2,
3854 state->timeout_msec,
3855 0xFFFE, 0, NULL, /* pid, tid, session */
3856 0, NULL, /* wct, vwv */
3857 bytes.length, bytes.data);
3858 }
3859
3860 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
3861 {
3862 struct tevent_req *req =
3863 tevent_req_callback_data(subreq,
3864 struct tevent_req);
3865 struct smbXcli_negprot_state *state =
3866 tevent_req_data(req,
3867 struct smbXcli_negprot_state);
3868 struct smbXcli_conn *conn = state->conn;
3869 struct iovec *recv_iov = NULL;
3870 uint8_t *inhdr;
3871 uint8_t wct;
3872 uint16_t *vwv;
3873 uint32_t num_bytes;
3874 uint8_t *bytes;
3875 NTSTATUS status;
3876 uint16_t protnum;
3877 size_t i;
3878 size_t num_prots = 0;
3879 uint8_t flags;
3880 uint32_t client_capabilities = conn->smb1.client.capabilities;
3881 uint32_t both_capabilities;
3882 uint32_t server_capabilities = 0;
3883 uint32_t capabilities;
3884 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
3885 uint32_t server_max_xmit = 0;
3886 uint32_t max_xmit;
3887 uint32_t server_max_mux = 0;
3888 uint16_t server_security_mode = 0;
3889 uint32_t server_session_key = 0;
3890 bool server_readbraw = false;
3891 bool server_writebraw = false;
3892 bool server_lockread = false;
3893 bool server_writeunlock = false;
3894 struct GUID server_guid = GUID_zero();
3895 DATA_BLOB server_gss_blob = data_blob_null;
3896 uint8_t server_challenge[8];
3897 char *server_workgroup = NULL;
3898 char *server_name = NULL;
3899 int server_time_zone = 0;
3900 NTTIME server_system_time = 0;
3901 static const struct smb1cli_req_expected_response expected[] = {
3902 {
3903 .status = NT_STATUS_OK,
3904 .wct = 0x11, /* NT1 */
3905 },
3906 {
3907 .status = NT_STATUS_OK,
3908 .wct = 0x0D, /* LM */
3909 },
3910 {
3911 .status = NT_STATUS_OK,
3912 .wct = 0x01, /* CORE */
3913 }
3914 };
3915
3916 ZERO_STRUCT(server_challenge);
3917
3918 status = smb1cli_req_recv(subreq, state,
3919 &recv_iov,
3920 &inhdr,
3921 &wct,
3922 &vwv,
3923 NULL, /* pvwv_offset */
3924 &num_bytes,
3925 &bytes,
3926 NULL, /* pbytes_offset */
3927 NULL, /* pinbuf */
3928 expected, ARRAY_SIZE(expected));
3929 TALLOC_FREE(subreq);
3930 if (tevent_req_nterror(req, status)) {
3931 return;
3932 }
3933
3934 flags = CVAL(inhdr, HDR_FLG);
3935
3936 protnum = SVAL(vwv, 0);
3937
3938 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3939 if (smb1cli_prots[i].proto < state->min_protocol) {
3940 continue;
3941 }
3942
3943 if (smb1cli_prots[i].proto > state->max_protocol) {
3944 continue;
3945 }
3946
3947 if (protnum != num_prots) {
3948 num_prots++;
3949 continue;
3950 }
3951
3952 conn->protocol = smb1cli_prots[i].proto;
3953 break;
3954 }
3955
3956 if (conn->protocol == PROTOCOL_NONE) {
3957 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3958 return;
3959 }
3960
3961 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
3962 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
3963 "and the selected protocol level doesn't support it.\n"));
3964 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3965 return;
3966 }
3967
3968 if (flags & FLAG_SUPPORT_LOCKREAD) {
3969 server_lockread = true;
3970 server_writeunlock = true;
3971 }
3972
3973 if (conn->protocol >= PROTOCOL_NT1) {
3974 const char *client_signing = NULL;
3975 bool server_mandatory = false;
3976 bool server_allowed = false;
3977 const char *server_signing = NULL;
3978 bool ok;
3979 uint8_t key_len;
3980
3981 if (wct != 0x11) {
3982 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3983 return;
3984 }
3985
3986 /* NT protocol */
3987 server_security_mode = CVAL(vwv + 1, 0);
3988 server_max_mux = SVAL(vwv + 1, 1);
3989 server_max_xmit = IVAL(vwv + 3, 1);
3990 server_session_key = IVAL(vwv + 7, 1);
3991 server_time_zone = SVALS(vwv + 15, 1);
3992 server_time_zone *= 60;
3993 /* this time arrives in real GMT */
3994 server_system_time = BVAL(vwv + 11, 1);
3995 server_capabilities = IVAL(vwv + 9, 1);
3996
3997 key_len = CVAL(vwv + 16, 1);
3998
3999 if (server_capabilities & CAP_RAW_MODE) {
4000 server_readbraw = true;
4001 server_writebraw = true;
4002 }
4003 if (server_capabilities & CAP_LOCK_AND_READ) {
4004 server_lockread = true;
4005 }
4006
4007 if (server_capabilities & CAP_EXTENDED_SECURITY) {
4008 DATA_BLOB blob1, blob2;
4009
4010 if (num_bytes < 16) {
4011 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4012 return;
4013 }
4014
4015 blob1 = data_blob_const(bytes, 16);
4016 status = GUID_from_data_blob(&blob1, &server_guid);
4017 if (tevent_req_nterror(req, status)) {
4018 return;
4019 }
4020
4021 blob1 = data_blob_const(bytes+16, num_bytes-16);
4022 blob2 = data_blob_dup_talloc(state, blob1);
4023 if (blob1.length > 0 &&
4024 tevent_req_nomem(blob2.data, req)) {
4025 return;
4026 }
4027 server_gss_blob = blob2;
4028 } else {
4029 DATA_BLOB blob1, blob2;
4030
4031 if (num_bytes < key_len) {
4032 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4033 return;
4034 }
4035
4036 if (key_len != 0 && key_len != 8) {
4037 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4038 return;
4039 }
4040
4041 if (key_len == 8) {
4042 memcpy(server_challenge, bytes, 8);
4043 }
4044
4045 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4046 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
4047 if (blob1.length > 0) {
4048 size_t len;
4049
4050 len = utf16_len_n(blob1.data,
4051 blob1.length);
4052 blob1.length = len;
4053
4054 ok = convert_string_talloc(state,
4055 CH_UTF16LE,
4056 CH_UNIX,
4057 blob1.data,
4058 blob1.length,
4059 &server_workgroup,
4060 &len);
4061 if (!ok) {
4062 status = map_nt_error_from_unix_common(errno);
4063 tevent_req_nterror(req, status);
4064 return;
4065 }
4066 }
4067
4068 blob2.data += blob1.length;
4069 blob2.length -= blob1.length;
4070 if (blob2.length > 0) {
4071 size_t len;
4072
4073 len = utf16_len_n(blob1.data,
4074 blob1.length);
4075 blob1.length = len;
4076
4077 ok = convert_string_talloc(state,
4078 CH_UTF16LE,
4079 CH_UNIX,
4080 blob2.data,
4081 blob2.length,
4082 &server_name,
4083 &len);
4084 if (!ok) {
4085 status = map_nt_error_from_unix_common(errno);
4086 tevent_req_nterror(req, status);
4087 return;
4088 }
4089 }
4090 }
4091
4092 client_signing = "disabled";
4093 if (conn->allow_signing) {
4094 client_signing = "allowed";
4095 }
4096 if (conn->mandatory_signing) {
4097 client_signing = "required";
4098 }
4099
4100 server_signing = "not supported";
4101 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4102 server_signing = "supported";
4103 server_allowed = true;
4104 } else if (conn->mandatory_signing) {
4105 /*
4106 * We have mandatory signing as client
4107 * lets assume the server will look at our
4108 * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4109 * flag in the session setup
4110 */
4111 server_signing = "not announced";
4112 server_allowed = true;
4113 }
4114 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4115 server_signing = "required";
4116 server_mandatory = true;
4117 }
4118
4119 ok = smb_signing_set_negotiated(conn->smb1.signing,
4120 server_allowed,
4121 server_mandatory);
4122 if (!ok) {
4123 DEBUG(1,("cli_negprot: SMB signing is required, "
4124 "but client[%s] and server[%s] mismatch\n",
4125 client_signing, server_signing));
4126 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4127 return;
4128 }
4129
4130 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4131 DATA_BLOB blob1;
4132 uint8_t key_len;
4133 time_t t;
4134
4135 if (wct != 0x0D) {
4136 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4137 return;
4138 }
4139
4140 server_security_mode = SVAL(vwv + 1, 0);
4141 server_max_xmit = SVAL(vwv + 2, 0);
4142 server_max_mux = SVAL(vwv + 3, 0);
4143 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4144 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4145 server_session_key = IVAL(vwv + 6, 0);
4146 server_time_zone = SVALS(vwv + 10, 0);
4147 server_time_zone *= 60;
4148 /* this time is converted to GMT by make_unix_date */
4149 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4150 unix_to_nt_time(&server_system_time, t);
4151 key_len = SVAL(vwv + 11, 0);
4152
4153 if (num_bytes < key_len) {
4154 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4155 return;
4156 }
4157
4158 if (key_len != 0 && key_len != 8) {
4159 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4160 return;
4161 }
4162
4163 if (key_len == 8) {
4164 memcpy(server_challenge, bytes, 8);
4165 }
4166
4167 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4168 if (blob1.length > 0) {
4169 size_t len;
4170 bool ok;
4171
4172 len = utf16_len_n(blob1.data,
4173 blob1.length);
4174 blob1.length = len;
4175
4176 ok = convert_string_talloc(state,
4177 CH_DOS,
4178 CH_UNIX,
4179 blob1.data,
4180 blob1.length,
4181 &server_workgroup,
4182 &len);
4183 if (!ok) {
4184 status = map_nt_error_from_unix_common(errno);
4185 tevent_req_nterror(req, status);
4186 return;
4187 }
4188 }
4189
4190 } else {
4191 /* the old core protocol */
4192 server_time_zone = get_time_zone(time(NULL));
4193 server_max_xmit = 1024;
4194 server_max_mux = 1;
4195 }
4196
4197 if (server_max_xmit < 1024) {
4198 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4199 return;
4200 }
4201
4202 if (server_max_mux < 1) {
4203 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4204 return;
4205 }
4206
4207 /*
4208 * Now calculate the negotiated capabilities
4209 * based on the mask for:
4210 * - client only flags
4211 * - flags used in both directions
4212 * - server only flags
4213 */
4214 both_capabilities = client_capabilities & server_capabilities;
4215 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4216 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4217 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4218
4219 max_xmit = MIN(client_max_xmit, server_max_xmit);
4220
4221 conn->smb1.server.capabilities = server_capabilities;
4222 conn->smb1.capabilities = capabilities;
4223
4224 conn->smb1.server.max_xmit = server_max_xmit;
4225 conn->smb1.max_xmit = max_xmit;
4226
4227 conn->smb1.server.max_mux = server_max_mux;
4228
4229 conn->smb1.server.security_mode = server_security_mode;
4230
4231 conn->smb1.server.readbraw = server_readbraw;
4232 conn->smb1.server.writebraw = server_writebraw;
4233 conn->smb1.server.lockread = server_lockread;
4234 conn->smb1.server.writeunlock = server_writeunlock;
4235
4236 conn->smb1.server.session_key = server_session_key;
4237
4238 talloc_steal(conn, server_gss_blob.data);
4239 conn->smb1.server.gss_blob = server_gss_blob;
4240 conn->smb1.server.guid = server_guid;
4241 memcpy(conn->smb1.server.challenge, server_challenge, 8);
4242 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4243 conn->smb1.server.name = talloc_move(conn, &server_name);
4244
4245 conn->smb1.server.time_zone = server_time_zone;
4246 conn->smb1.server.system_time = server_system_time;
4247
4248 tevent_req_done(req);
4249 }
4250
4251 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4252 {
4253 size_t i;
4254 uint8_t *buf;
4255 uint16_t dialect_count = 0;
4256
4257 buf = state->smb2.dyn;
4258 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4259 if (smb2cli_prots[i].proto < state->min_protocol) {
4260 continue;
4261 }
4262
4263 if (smb2cli_prots[i].proto > state->max_protocol) {
4264 continue;
4265 }
4266
4267 SSVAL(buf, dialect_count*2, smb2cli_prots[i].smb2_dialect);
4268 dialect_count++;
4269 }
4270
4271 buf = state->smb2.fixed;
4272 SSVAL(buf, 0, 36);
4273 SSVAL(buf, 2, dialect_count);
4274 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4275 SSVAL(buf, 6, 0); /* Reserved */
4276 if (state->max_protocol >= PROTOCOL_SMB2_22) {
4277 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4278 } else {
4279 SIVAL(buf, 8, 0); /* Capabilities */
4280 }
4281 if (state->max_protocol >= PROTOCOL_SMB2_10) {
4282 NTSTATUS status;
4283 DATA_BLOB blob;
4284
4285 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4286 state, &blob);
4287 if (!NT_STATUS_IS_OK(status)) {
4288 return NULL;
4289 }
4290 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4291 } else {
4292 memset(buf+12, 0, 16); /* ClientGuid */
4293 }
4294 SBVAL(buf, 28, 0); /* ClientStartTime */
4295
4296 return smb2cli_req_send(state, state->ev,
4297 state->conn, SMB2_OP_NEGPROT,
4298 0, 0, /* flags */
4299 state->timeout_msec,
4300 NULL, NULL, /* tcon, session */
4301 state->smb2.fixed, sizeof(state->smb2.fixed),
4302 state->smb2.dyn, dialect_count*2,
4303 UINT16_MAX); /* max_dyn_len */
4304 }
4305
4306 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4307 {
4308 struct tevent_req *req =
4309 tevent_req_callback_data(subreq,
4310 struct tevent_req);
4311 struct smbXcli_negprot_state *state =
4312 tevent_req_data(req,
4313 struct smbXcli_negprot_state);
4314 struct smbXcli_conn *conn = state->conn;
4315 size_t security_offset, security_length;
4316 DATA_BLOB blob;
4317 NTSTATUS status;
4318 struct iovec *iov;
4319 uint8_t *body;
4320 size_t i;
4321 uint16_t dialect_revision;
4322 static const struct smb2cli_req_expected_response expected[] = {
4323 {
4324 .status = NT_STATUS_OK,
4325 .body_size = 0x41
4326 }
4327 };
4328
4329 status = smb2cli_req_recv(subreq, state, &iov,
4330 expected, ARRAY_SIZE(expected));
4331 TALLOC_FREE(subreq);
4332 if (tevent_req_nterror(req, status)) {
4333 return;
4334 }
4335
4336 body = (uint8_t *)iov[1].iov_base;
4337
4338 dialect_revision = SVAL(body, 4);
4339
4340 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4341 if (smb2cli_prots[i].proto < state->min_protocol) {
4342 continue;
4343 }
4344
4345 if (smb2cli_prots[i].proto > state->max_protocol) {
4346 continue;
4347 }
4348
4349 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4350 continue;
4351 }
4352
4353 conn->protocol = smb2cli_prots[i].proto;
4354 break;
4355 }
4356
4357 if (conn->protocol == PROTOCOL_NONE) {
4358 if (state->min_protocol >= PROTOCOL_SMB2_02) {
4359 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4360 return;
4361 }
4362
4363 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4364 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4365 return;
4366 }
4367
4368 /* make sure we do not loop forever */
4369 state->min_protocol = PROTOCOL_SMB2_02;
4370
4371 /*
4372 * send a SMB2 negprot, in order to negotiate
4373 * the SMB2 dialect.
4374 */
4375 subreq = smbXcli_negprot_smb2_subreq(state);
4376 if (tevent_req_nomem(subreq, req)) {
4377 return;
4378 }
4379 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4380 return;
4381 }
4382
4383 conn->smb2.server.security_mode = SVAL(body, 2);
4384
4385 blob = data_blob_const(body + 8, 16);
4386 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4387 if (tevent_req_nterror(req, status)) {
4388 return;
4389 }
4390
4391 conn->smb2.server.capabilities = IVAL(body, 24);
4392 conn->smb2.server.max_trans_size= IVAL(body, 28);
4393 conn->smb2.server.max_read_size = IVAL(body, 32);
4394 conn->smb2.server.max_write_size= IVAL(body, 36);
4395 conn->smb2.server.system_time = BVAL(body, 40);
4396 conn->smb2.server.start_time = BVAL(body, 48);
4397
4398 security_offset = SVAL(body, 56);
4399 security_length = SVAL(body, 58);
4400
4401 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4402 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4403 return;
4404 }
4405
4406 if (security_length > iov[2].iov_len) {
4407 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4408 return;
4409 }
4410
4411 conn->smb2.server.gss_blob = data_blob_talloc(conn,
4412 iov[2].iov_base,
4413 security_length);
4414 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4415 return;
4416 }
4417
4418 tevent_req_done(req);
4419 }
4420
4421 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4422 TALLOC_CTX *tmp_mem,
4423 uint8_t *inbuf)
4424 {
4425 size_t num_pending = talloc_array_length(conn->pending);
4426 struct tevent_req *subreq;
4427 struct smbXcli_req_state *substate;
4428 struct tevent_req *req;
4429 uint32_t protocol_magic;
4430 size_t inbuf_len = smb_len_nbt(inbuf);
4431
4432 if (num_pending != 1) {
4433 return NT_STATUS_INTERNAL_ERROR;
4434 }
4435
4436 if (inbuf_len < 4) {
4437 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4438 }
4439
4440 subreq = conn->pending[0];
4441 substate = tevent_req_data(subreq, struct smbXcli_req_state);
4442 req = tevent_req_callback_data(subreq, struct tevent_req);
4443
4444 protocol_magic = IVAL(inbuf, 4);
4445
4446 switch (protocol_magic) {
4447 case SMB_MAGIC:
4448 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4449 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4450 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4451
4452 case SMB2_MAGIC:
4453 if (substate->smb2.recv_iov == NULL) {
4454 /*
4455 * For the SMB1 negprot we have move it.
4456 */
4457 substate->smb2.recv_iov = substate->smb1.recv_iov;
4458 substate->smb1.recv_iov = NULL;
4459 }
4460
4461 /*
4462 * we got an SMB2 answer, which consumed sequence number 0
4463 * so we need to use 1 as the next one.
4464 *
4465 * we also need to set the current credits to 0
4466 * as we consumed the initial one. The SMB2 answer
4467 * hopefully grant us a new credit.
4468 */
4469 conn->smb2.mid = 1;
4470 conn->smb2.cur_credits = 0;
4471 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4472 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4473 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4474 }
4475
4476 DEBUG(10, ("Got non-SMB PDU\n"));
4477 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4478 }
4479
4480 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
4481 {
4482 return tevent_req_simple_recv_ntstatus(req);
4483 }
4484
4485 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
4486 uint32_t timeout_msec,
4487 enum protocol_types min_protocol,
4488 enum protocol_types max_protocol)
4489 {
4490 TALLOC_CTX *frame = talloc_stackframe();
4491 struct tevent_context *ev;
4492 struct tevent_req *req;
4493 NTSTATUS status = NT_STATUS_NO_MEMORY;
4494 bool ok;
4495
4496 if (smbXcli_conn_has_async_calls(conn)) {
4497 /*
4498 * Can't use sync call while an async call is in flight
4499 */
4500 status = NT_STATUS_INVALID_PARAMETER_MIX;
4501 goto fail;
4502 }
4503 ev = samba_tevent_context_init(frame);
4504 if (ev == NULL) {
4505 goto fail;
4506 }
4507 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
4508 min_protocol, max_protocol);
4509 if (req == NULL) {
4510 goto fail;
4511 }
4512 ok = tevent_req_poll(req, ev);
4513 if (!ok) {
4514 status = map_nt_error_from_unix_common(errno);
4515 goto fail;
4516 }
4517 status = smbXcli_negprot_recv(req);
4518 fail:
4519 TALLOC_FREE(frame);
4520 return status;
4521 }
4522
4523 static int smbXcli_session_destructor(struct smbXcli_session *session)
4524 {
4525 if (session->conn == NULL) {
4526 return 0;
4527 }
4528
4529 DLIST_REMOVE(session->conn->sessions, session);
4530 return 0;
4531 }
4532
4533 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
4534 struct smbXcli_conn *conn)
4535 {
4536 struct smbXcli_session *session;
4537
4538 session = talloc_zero(mem_ctx, struct smbXcli_session);
4539 if (session == NULL) {
4540 return NULL;
4541 }
4542 session->smb2 = talloc_zero(session, struct smb2cli_session);
4543 if (session->smb2 == NULL) {
4544 talloc_free(session);
4545 return NULL;
4546 }
4547 talloc_set_destructor(session, smbXcli_session_destructor);
4548
4549 DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
4550 session->conn = conn;
4551
4552 return session;
4553 }
4554
4555 struct smbXcli_session *smbXcli_session_copy(TALLOC_CTX *mem_ctx,
4556 struct smbXcli_session *src)
4557 {
4558 struct smbXcli_session *session;
4559
4560 session = talloc_zero(mem_ctx, struct smbXcli_session);
4561 if (session == NULL) {
4562 return NULL;
4563 }
4564 session->smb2 = talloc_zero(session, struct smb2cli_session);
4565 if (session->smb2 == NULL) {
4566 talloc_free(session);
4567 return NULL;
4568 }
4569
4570 session->conn = src->conn;
4571 *session->smb2 = *src->smb2;
4572 session->smb2_channel = src->smb2_channel;
4573 session->disconnect_expired = src->disconnect_expired;
4574
4575 DLIST_ADD_END(src->conn->sessions, session, struct smbXcli_session *);
4576 talloc_set_destructor(session, smbXcli_session_destructor);
4577
4578 return session;
4579 }
4580
4581
4582 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
4583 TALLOC_CTX *mem_ctx,
4584 DATA_BLOB *key)
4585 {
4586 const DATA_BLOB *application_key;
4587
4588 *key = data_blob_null;
4589
4590 if (session->conn == NULL) {
4591 return NT_STATUS_NO_USER_SESSION_KEY;
4592 }
4593
4594 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
4595 application_key = &session->smb2->application_key;
4596 } else {
4597 application_key = &session->smb1.application_key;
4598 }
4599
4600 if (application_key->length == 0) {
4601 return NT_STATUS_NO_USER_SESSION_KEY;
4602 }
4603
4604 *key = data_blob_dup_talloc(mem_ctx, *application_key);
4605 if (key->data == NULL) {
4606 return NT_STATUS_NO_MEMORY;
4607 }
4608
4609 return NT_STATUS_OK;
4610 }
4611
4612 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
4613 {
4614 session->disconnect_expired = true;
4615 }
4616
4617 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
4618 {
4619 return session->smb1.session_id;
4620 }
4621
4622 void smb1cli_session_set_id(struct smbXcli_session *session,
4623 uint16_t session_id)
4624 {
4625 session->smb1.session_id = session_id;
4626 }
4627
4628 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
4629 const DATA_BLOB _session_key)
4630 {
4631 struct smbXcli_conn *conn = session->conn;
4632 uint8_t session_key[16];
4633
4634 if (conn == NULL) {
4635 return NT_STATUS_INVALID_PARAMETER_MIX;
4636 }
4637
4638 if (session->smb1.application_key.length != 0) {
4639 /*
4640 * TODO: do not allow this...
4641 *
4642 * return NT_STATUS_INVALID_PARAMETER_MIX;
4643 */
4644 data_blob_clear_free(&session->smb1.application_key);
4645 session->smb1.protected_key = false;
4646 }
4647
4648 if (_session_key.length == 0) {
4649 return NT_STATUS_OK;
4650 }
4651
4652 ZERO_STRUCT(session_key);
4653 memcpy(session_key, _session_key.data,
4654 MIN(_session_key.length, sizeof(session_key)));
4655
4656 session->smb1.application_key = data_blob_talloc(session,
4657 session_key,
4658 sizeof(session_key));
4659 ZERO_STRUCT(session_key);
4660 if (session->smb1.application_key.data == NULL) {
4661 return NT_STATUS_NO_MEMORY;
4662 }
4663
4664 session->smb1.protected_key = false;
4665
4666 return NT_STATUS_OK;
4667 }
4668
4669 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
4670 {
4671 if (session->smb1.protected_key) {
4672 /* already protected */
4673 return NT_STATUS_OK;
4674 }
4675
4676 if (session->smb1.application_key.length != 16) {
4677 return NT_STATUS_INVALID_PARAMETER_MIX;
4678 }
4679
4680 smb_key_derivation(session->smb1.application_key.data,
4681 session->smb1.application_key.length,
4682 session->smb1.application_key.data);
4683
4684 session->smb1.protected_key = true;
4685
4686 return NT_STATUS_OK;
4687 }
4688
4689 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
4690 {
4691 struct smbXcli_conn *conn = session->conn;
4692 uint8_t security_mode = 0;
4693
4694 if (conn == NULL) {
4695 return security_mode;
4696 }
4697
4698 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
4699 if (conn->mandatory_signing) {
4700 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
4701 }
4702
4703 return security_mode;
4704 }
4705
4706 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
4707 {
4708 return session->smb2->session_id;
4709 }
4710
4711 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
4712 {
4713 return session->smb2->session_flags;
4714 }
4715
4716 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
4717 uint64_t session_id,
4718 uint16_t session_flags)
4719 {
4720 session->smb2->session_id = session_id;
4721 session->smb2->session_flags = session_flags;
4722 }
4723
4724 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
4725 {
4726 session->smb2->channel_sequence += 1;
4727 }
4728
4729 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
4730 const DATA_BLOB _session_key,
4731 const struct iovec *recv_iov)
4732 {
4733 struct smbXcli_conn *conn = session->conn;
4734 uint16_t no_sign_flags;
4735 uint8_t session_key[16];
4736 NTSTATUS status;
4737
4738 if (conn == NULL) {
4739 return NT_STATUS_INVALID_PARAMETER_MIX;
4740 }
4741
4742 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
4743
4744 if (session->smb2->session_flags & no_sign_flags) {
4745 session->smb2->should_sign = false;
4746 return NT_STATUS_OK;
4747 }
4748
4749 if (session->smb2->signing_key.length != 0) {
4750 return NT_STATUS_INVALID_PARAMETER_MIX;
4751 }
4752
4753 ZERO_STRUCT(session_key);
4754 memcpy(session_key, _session_key.data,
4755 MIN(_session_key.length, sizeof(session_key)));
4756
4757 session->smb2->signing_key = data_blob_talloc(session,
4758 session_key,
4759 sizeof(session_key));
4760 if (session->smb2->signing_key.data == NULL) {
4761 ZERO_STRUCT(session_key);
4762 return NT_STATUS_NO_MEMORY;
4763 }
4764
4765 if (conn->protocol >= PROTOCOL_SMB2_24) {
4766 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4767 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4768
4769 smb2_key_derivation(session_key, sizeof(session_key),
4770 label.data, label.length,
4771 context.data, context.length,
4772 session->smb2->signing_key.data);
4773 }
4774
4775 session->smb2->encryption_key = data_blob_dup_talloc(session,
4776 session->smb2->signing_key);
4777 if (session->smb2->encryption_key.data == NULL) {
4778 ZERO_STRUCT(session_key);
4779 return NT_STATUS_NO_MEMORY;
4780 }
4781
4782 if (conn->protocol >= PROTOCOL_SMB2_24) {
4783 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4784 const DATA_BLOB context = data_blob_string_const_null("ServerIn ");
4785
4786 smb2_key_derivation(session_key, sizeof(session_key),
4787 label.data, label.length,
4788 context.data, context.length,
4789 session->smb2->encryption_key.data);
4790 }
4791
4792 session->smb2->decryption_key = data_blob_dup_talloc(session,
4793 session->smb2->signing_key);
4794 if (session->smb2->decryption_key.data == NULL) {
4795 ZERO_STRUCT(session_key);
4796 return NT_STATUS_NO_MEMORY;
4797 }
4798
4799 if (conn->protocol >= PROTOCOL_SMB2_24) {
4800 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4801 const DATA_BLOB context = data_blob_string_const_null("ServerOut");
4802
4803 smb2_key_derivation(session_key, sizeof(session_key),
4804 label.data, label.length,
4805 context.data, context.length,
4806 session->smb2->decryption_key.data);
4807 }
4808
4809 session->smb2->application_key = data_blob_dup_talloc(session,
4810 session->smb2->signing_key);
4811 if (session->smb2->application_key.data == NULL) {
4812 ZERO_STRUCT(session_key);
4813 return NT_STATUS_NO_MEMORY;
4814 }
4815
4816 if (conn->protocol >= PROTOCOL_SMB2_24) {
4817 const DATA_BLOB label = data_blob_string_const_null("SMB2APP");
4818 const DATA_BLOB context = data_blob_string_const_null("SmbRpc");
4819
4820 smb2_key_derivation(session_key, sizeof(session_key),
4821 label.data, label.length,
4822 context.data, context.length,
4823 session->smb2->application_key.data);
4824 }
4825 ZERO_STRUCT(session_key);
4826
4827 session->smb2_channel.signing_key = data_blob_dup_talloc(session,
4828 session->smb2->signing_key);
4829 if (session->smb2_channel.signing_key.data == NULL) {
4830 return NT_STATUS_NO_MEMORY;
4831 }
4832
4833 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4834 session->conn->protocol,
4835 recv_iov, 3);
4836 if (!NT_STATUS_IS_OK(status)) {
4837 return status;
4838 }
4839
4840 session->smb2->should_sign = false;
4841 session->smb2->should_encrypt = false;
4842
4843 if (conn->desire_signing) {
4844 session->smb2->should_sign = true;
4845 }
4846
4847 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
4848 session->smb2->should_sign = true;
4849 }
4850
4851 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
4852 session->smb2->should_encrypt = true;
4853 }
4854
4855 if (conn->protocol < PROTOCOL_SMB2_24) {
4856 session->smb2->should_encrypt = false;
4857 }
4858
4859 if (!(conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
4860 session->smb2->should_encrypt = false;
4861 }
4862
4863 generate_random_buffer((uint8_t *)&session->smb2->nonce_high,
4864 sizeof(session->smb2->nonce_high));
4865 session->smb2->nonce_low = 1;
4866
4867 return NT_STATUS_OK;
4868 }
4869
4870 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
4871 struct smbXcli_session *session1,
4872 struct smbXcli_conn *conn,
4873 struct smbXcli_session **_session2)
4874 {
4875 struct smbXcli_session *session2;
4876
4877 if (session1->smb2->signing_key.length == 0) {
4878 return NT_STATUS_INVALID_PARAMETER_MIX;
4879 }
4880
4881 if (conn == NULL) {
4882 return NT_STATUS_INVALID_PARAMETER_MIX;
4883 }
4884
4885 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
4886 if (session2 == NULL) {
4887 return NT_STATUS_NO_MEMORY;
4888 }
4889 session2->smb2 = talloc_reference(session2, session1->smb2);
4890 if (session2->smb2 == NULL) {
4891 talloc_free(session2);
4892 return NT_STATUS_NO_MEMORY;
4893 }
4894
4895 talloc_set_destructor(session2, smbXcli_session_destructor);
4896 DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
4897 session2->conn = conn;
4898
4899 *_session2 = session2;
4900 return NT_STATUS_OK;
4901 }
4902
4903 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
4904 const DATA_BLOB _channel_key,
4905 const struct iovec *recv_iov)
4906 {
4907 struct smbXcli_conn *conn = session->conn;
4908 uint8_t channel_key[16];
4909 NTSTATUS status;
4910
4911 if (conn == NULL) {
4912 return NT_STATUS_INVALID_PARAMETER_MIX;
4913 }
4914
4915 if (session->smb2_channel.signing_key.length != 0) {
4916 return NT_STATUS_INVALID_PARAMETER_MIX;
4917 }
4918
4919 ZERO_STRUCT(channel_key);
4920 memcpy(channel_key, _channel_key.data,
4921 MIN(_channel_key.length, sizeof(channel_key)));
4922
4923 session->smb2_channel.signing_key = data_blob_talloc(session,
4924 channel_key,
4925 sizeof(channel_key));
4926 if (session->smb2_channel.signing_key.data == NULL) {
4927 ZERO_STRUCT(channel_key);
4928 return NT_STATUS_NO_MEMORY;
4929 }
4930
4931 if (conn->protocol >= PROTOCOL_SMB2_24) {
4932 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4933 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4934
4935 smb2_key_derivation(channel_key, sizeof(channel_key),
4936 label.data, label.length,
4937 context.data, context.length,
4938 session->smb2_channel.signing_key.data);
4939 }
4940 ZERO_STRUCT(channel_key);
4941
4942 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4943 session->conn->protocol,
4944 recv_iov, 3);
4945 if (!NT_STATUS_IS_OK(status)) {
4946 return status;
4947 }
4948
4949 return NT_STATUS_OK;
4950 }
4951
4952 NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
4953 {
4954 if (session->smb2->should_encrypt) {
4955 return NT_STATUS_OK;
4956 }
4957
4958 if (session->conn->protocol < PROTOCOL_SMB2_24) {
4959 return NT_STATUS_NOT_SUPPORTED;
4960 }
4961
4962 if (!(session->conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
4963 return NT_STATUS_NOT_SUPPORTED;
4964 }
4965
4966 if (session->smb2->signing_key.data == NULL) {
4967 return NT_STATUS_NOT_SUPPORTED;
4968 }
4969 session->smb2->should_encrypt = true;
4970 return NT_STATUS_OK;
4971 }
4972
4973 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
4974 {
4975 struct smbXcli_tcon *tcon;
4976
4977 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
4978 if (tcon == NULL) {
4979 return NULL;
4980 }
4981
4982 return tcon;
4983 }
4984
4985 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
4986 {
4987 return tcon->smb1.tcon_id;
4988 }
4989
4990 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
4991 {
4992 tcon->smb1.tcon_id = tcon_id;
4993 }
4994
4995 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
4996 uint16_t tcon_id,
4997 uint16_t optional_support,
4998 uint32_t maximal_access,
4999 uint32_t guest_maximal_access,
5000 const char *service,
5001 const char *fs_type)
5002 {
5003 tcon->smb1.tcon_id = tcon_id;
5004 tcon->smb1.optional_support = optional_support;
5005 tcon->smb1.maximal_access = maximal_access;
5006 tcon->smb1.guest_maximal_access = guest_maximal_access;
5007
5008 TALLOC_FREE(tcon->smb1.service);
5009 tcon->smb1.service = talloc_strdup(tcon, service);
5010 if (service != NULL && tcon->smb1.service == NULL) {
5011 return false;
5012 }
5013
5014 TALLOC_FREE(tcon->smb1.fs_type);
5015 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
5016 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
5017 return false;
5018 }
5019
5020 return true;
5021 }
5022
5023 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
5024 {
5025 return tcon->smb2.tcon_id;
5026 }
5027
5028 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
5029 {
5030 return tcon->smb2.capabilities;
5031 }
5032
5033 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
5034 struct smbXcli_session *session,
5035 uint32_t tcon_id,
5036 uint8_t type,
5037 uint32_t flags,
5038 uint32_t capabilities,
5039 uint32_t maximal_access)
5040 {
5041 tcon->smb2.tcon_id = tcon_id;
5042 tcon->smb2.type = type;
5043 tcon->smb2.flags = flags;
5044 tcon->smb2.capabilities = capabilities;
5045 tcon->smb2.maximal_access = maximal_access;
5046
5047 tcon->smb2.should_encrypt = false;
5048
5049 if (session == NULL) {
5050 return;
5051 }
5052
5053 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
5054
5055 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
5056 tcon->smb2.should_encrypt = true;
5057 }
5058 }
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