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libcli/smb/smbXcli: add smb2cli_session_application_key()
[Samba.git] / libcli / smb / smbXcli_base.c
blobc17254f0a86e7141e7bd1656abedc8ade99b49a1
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
39 struct smbXcli_conn {
40 int read_fd;
41 int write_fd;
42 struct sockaddr_storage local_ss;
43 struct sockaddr_storage remote_ss;
44 const char *remote_name;
45
46 struct tevent_queue *outgoing;
47 struct tevent_req **pending;
48 struct tevent_req *read_smb_req;
49
50 enum protocol_types protocol;
51 bool allow_signing;
52 bool desire_signing;
53 bool mandatory_signing;
54
55 /*
56 * The incoming dispatch function should return:
57 * - NT_STATUS_RETRY, if more incoming PDUs are expected.
58 * - NT_STATUS_OK, if no more processing is desired, e.g.
59 * the dispatch function called
60 * tevent_req_done().
61 * - All other return values disconnect the connection.
62 */
63 NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
64 TALLOC_CTX *tmp_mem,
65 uint8_t *inbuf);
66
67 struct {
68 struct {
69 uint32_t capabilities;
70 uint32_t max_xmit;
71 } client;
72
73 struct {
74 uint32_t capabilities;
75 uint32_t max_xmit;
76 uint16_t max_mux;
77 uint16_t security_mode;
78 bool readbraw;
79 bool writebraw;
80 bool lockread;
81 bool writeunlock;
82 uint32_t session_key;
83 struct GUID guid;
84 DATA_BLOB gss_blob;
85 uint8_t challenge[8];
86 const char *workgroup;
87 const char *name;
88 int time_zone;
89 NTTIME system_time;
90 } server;
91
92 uint32_t capabilities;
93 uint32_t max_xmit;
94
95 uint16_t mid;
96
97 struct smb_signing_state *signing;
98 struct smb_trans_enc_state *trans_enc;
99
100 struct tevent_req *read_braw_req;
101 } smb1;
102
103 struct {
104 struct {
105 uint16_t security_mode;
106 struct GUID guid;
107 } client;
108
109 struct {
110 uint32_t capabilities;
111 uint16_t security_mode;
112 struct GUID guid;
113 uint32_t max_trans_size;
114 uint32_t max_read_size;
115 uint32_t max_write_size;
116 NTTIME system_time;
117 NTTIME start_time;
118 DATA_BLOB gss_blob;
119 } server;
120
121 uint64_t mid;
122 uint16_t cur_credits;
123 uint16_t max_credits;
124 } smb2;
125
126 struct smbXcli_session *sessions;
127 };
128
129 struct smbXcli_session {
130 struct smbXcli_session *prev, *next;
131 struct smbXcli_conn *conn;
132
133 struct {
134 uint64_t session_id;
135 uint16_t session_flags;
136 DATA_BLOB application_key;
137 DATA_BLOB signing_key;
138 bool should_sign;
139 DATA_BLOB channel_signing_key;
140 } smb2;
141 };
142
143 struct smbXcli_req_state {
144 struct tevent_context *ev;
145 struct smbXcli_conn *conn;
146 struct smbXcli_session *session; /* maybe NULL */
147
148 uint8_t length_hdr[4];
149
150 bool one_way;
151
152 uint8_t *inbuf;
153
154 struct {
155 /* Space for the header including the wct */
156 uint8_t hdr[HDR_VWV];
157
158 /*
159 * For normal requests, smb1cli_req_send chooses a mid.
160 * SecondaryV trans requests need to use the mid of the primary
161 * request, so we need a place to store it.
162 * Assume it is set if != 0.
163 */
164 uint16_t mid;
165
166 uint16_t *vwv;
167 uint8_t bytecount_buf[2];
168
169 #define MAX_SMB_IOV 10
170 /* length_hdr, hdr, words, byte_count, buffers */
171 struct iovec iov[1 + 3 + MAX_SMB_IOV];
172 int iov_count;
173
174 bool one_way_seqnum;
175 uint32_t seqnum;
176 struct tevent_req **chained_requests;
177
178 uint8_t recv_cmd;
179 NTSTATUS recv_status;
180 /* always an array of 3 talloc elements */
181 struct iovec *recv_iov;
182 } smb1;
183
184 struct {
185 const uint8_t *fixed;
186 uint16_t fixed_len;
187 const uint8_t *dyn;
188 uint32_t dyn_len;
189
190 uint8_t hdr[64];
191 uint8_t pad[7]; /* padding space for compounding */
192
193 /* always an array of 3 talloc elements */
194 struct iovec *recv_iov;
195
196 uint16_t credit_charge;
197
198 bool signing_skipped;
199 bool notify_async;
200 bool got_async;
201 } smb2;
202 };
203
204 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
205 {
206 /*
207 * NT_STATUS_OK, means we do not notify the callers
208 */
209 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
210
211 while (conn->sessions) {
212 conn->sessions->conn = NULL;
213 DLIST_REMOVE(conn->sessions, conn->sessions);
214 }
215
216 if (conn->smb1.trans_enc) {
217 TALLOC_FREE(conn->smb1.trans_enc);
218 }
219
220 return 0;
221 }
222
223 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
224 int fd,
225 const char *remote_name,
226 enum smb_signing_setting signing_state,
227 uint32_t smb1_capabilities,
228 struct GUID *client_guid)
229 {
230 struct smbXcli_conn *conn = NULL;
231 void *ss = NULL;
232 struct sockaddr *sa = NULL;
233 socklen_t sa_length;
234 int ret;
235
236 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
237 if (!conn) {
238 return NULL;
239 }
240
241 conn->read_fd = fd;
242 conn->write_fd = dup(fd);
243 if (conn->write_fd == -1) {
244 goto error;
245 }
246
247 conn->remote_name = talloc_strdup(conn, remote_name);
248 if (conn->remote_name == NULL) {
249 goto error;
250 }
251
252
253 ss = (void *)&conn->local_ss;
254 sa = (struct sockaddr *)ss;
255 sa_length = sizeof(conn->local_ss);
256 ret = getsockname(fd, sa, &sa_length);
257 if (ret == -1) {
258 goto error;
259 }
260 ss = (void *)&conn->remote_ss;
261 sa = (struct sockaddr *)ss;
262 sa_length = sizeof(conn->remote_ss);
263 ret = getpeername(fd, sa, &sa_length);
264 if (ret == -1) {
265 goto error;
266 }
267
268 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
269 if (conn->outgoing == NULL) {
270 goto error;
271 }
272 conn->pending = NULL;
273
274 conn->protocol = PROTOCOL_NONE;
275
276 switch (signing_state) {
277 case SMB_SIGNING_OFF:
278 /* never */
279 conn->allow_signing = false;
280 conn->desire_signing = false;
281 conn->mandatory_signing = false;
282 break;
283 case SMB_SIGNING_DEFAULT:
284 case SMB_SIGNING_IF_REQUIRED:
285 /* if the server requires it */
286 conn->allow_signing = true;
287 conn->desire_signing = false;
288 conn->mandatory_signing = false;
289 break;
290 case SMB_SIGNING_REQUIRED:
291 /* always */
292 conn->allow_signing = true;
293 conn->desire_signing = true;
294 conn->mandatory_signing = true;
295 break;
296 }
297
298 conn->smb1.client.capabilities = smb1_capabilities;
299 conn->smb1.client.max_xmit = UINT16_MAX;
300
301 conn->smb1.capabilities = conn->smb1.client.capabilities;
302 conn->smb1.max_xmit = 1024;
303
304 conn->smb1.mid = 1;
305
306 /* initialise signing */
307 conn->smb1.signing = smb_signing_init(conn,
308 conn->allow_signing,
309 conn->desire_signing,
310 conn->mandatory_signing);
311 if (!conn->smb1.signing) {
312 goto error;
313 }
314
315 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
316 if (conn->mandatory_signing) {
317 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
318 }
319 if (client_guid) {
320 conn->smb2.client.guid = *client_guid;
321 }
322
323 conn->smb2.cur_credits = 1;
324 conn->smb2.max_credits = 0;
325
326 talloc_set_destructor(conn, smbXcli_conn_destructor);
327 return conn;
328
329 error:
330 if (conn->write_fd != -1) {
331 close(conn->write_fd);
332 }
333 TALLOC_FREE(conn);
334 return NULL;
335 }
336
337 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
338 {
339 if (conn == NULL) {
340 return false;
341 }
342
343 if (conn->read_fd == -1) {
344 return false;
345 }
346
347 return true;
348 }
349
350 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
351 {
352 return conn->protocol;
353 }
354
355 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
356 {
357 if (conn->protocol >= PROTOCOL_SMB2_02) {
358 return true;
359 }
360
361 if (conn->smb1.capabilities & CAP_UNICODE) {
362 return true;
363 }
364
365 return false;
366 }
367
368 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
369 {
370 set_socket_options(conn->read_fd, options);
371 }
372
373 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
374 {
375 return &conn->local_ss;
376 }
377
378 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
379 {
380 return &conn->remote_ss;
381 }
382
383 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
384 {
385 return conn->remote_name;
386 }
387
388 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
389 {
390 if (conn->protocol >= PROTOCOL_SMB2_02) {
391 /*
392 * TODO...
393 */
394 return 1;
395 }
396
397 return conn->smb1.server.max_mux;
398 }
399
400 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
401 {
402 if (conn->protocol >= PROTOCOL_SMB2_02) {
403 return conn->smb2.server.system_time;
404 }
405
406 return conn->smb1.server.system_time;
407 }
408
409 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
410 {
411 if (conn->protocol >= PROTOCOL_SMB2_02) {
412 return &conn->smb2.server.gss_blob;
413 }
414
415 return &conn->smb1.server.gss_blob;
416 }
417
418 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
419 {
420 if (conn->protocol >= PROTOCOL_SMB2_02) {
421 return &conn->smb2.server.guid;
422 }
423
424 return &conn->smb1.server.guid;
425 }
426
427 struct smbXcli_conn_samba_suicide_state {
428 struct smbXcli_conn *conn;
429 struct iovec iov;
430 uint8_t buf[9];
431 };
432
433 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
434
435 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
436 struct tevent_context *ev,
437 struct smbXcli_conn *conn,
438 uint8_t exitcode)
439 {
440 struct tevent_req *req, *subreq;
441 struct smbXcli_conn_samba_suicide_state *state;
442
443 req = tevent_req_create(mem_ctx, &state,
444 struct smbXcli_conn_samba_suicide_state);
445 if (req == NULL) {
446 return NULL;
447 }
448 state->conn = conn;
449 SIVAL(state->buf, 4, 0x74697865);
450 SCVAL(state->buf, 8, exitcode);
451 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
452
453 state->iov.iov_base = state->buf;
454 state->iov.iov_len = sizeof(state->buf);
455
456 subreq = writev_send(state, ev, conn->outgoing, conn->write_fd,
457 false, &state->iov, 1);
458 if (tevent_req_nomem(subreq, req)) {
459 return tevent_req_post(req, ev);
460 }
461 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
462 return req;
463 }
464
465 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
466 {
467 struct tevent_req *req = tevent_req_callback_data(
468 subreq, struct tevent_req);
469 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
470 req, struct smbXcli_conn_samba_suicide_state);
471 ssize_t nwritten;
472 int err;
473
474 nwritten = writev_recv(subreq, &err);
475 TALLOC_FREE(subreq);
476 if (nwritten == -1) {
477 NTSTATUS status = map_nt_error_from_unix_common(err);
478 smbXcli_conn_disconnect(state->conn, status);
479 return;
480 }
481 tevent_req_done(req);
482 }
483
484 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
485 {
486 return tevent_req_simple_recv_ntstatus(req);
487 }
488
489 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
490 uint8_t exitcode)
491 {
492 TALLOC_CTX *frame = talloc_stackframe();
493 struct tevent_context *ev;
494 struct tevent_req *req;
495 NTSTATUS status = NT_STATUS_NO_MEMORY;
496 bool ok;
497
498 if (smbXcli_conn_has_async_calls(conn)) {
499 /*
500 * Can't use sync call while an async call is in flight
501 */
502 status = NT_STATUS_INVALID_PARAMETER_MIX;
503 goto fail;
504 }
505 ev = tevent_context_init(frame);
506 if (ev == NULL) {
507 goto fail;
508 }
509 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
510 if (req == NULL) {
511 goto fail;
512 }
513 ok = tevent_req_poll(req, ev);
514 if (!ok) {
515 status = map_nt_error_from_unix_common(errno);
516 goto fail;
517 }
518 status = smbXcli_conn_samba_suicide_recv(req);
519 fail:
520 TALLOC_FREE(frame);
521 return status;
522 }
523
524 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
525 {
526 return conn->smb1.capabilities;
527 }
528
529 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
530 {
531 return conn->smb1.max_xmit;
532 }
533
534 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
535 {
536 return conn->smb1.server.session_key;
537 }
538
539 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
540 {
541 return conn->smb1.server.challenge;
542 }
543
544 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
545 {
546 return conn->smb1.server.security_mode;
547 }
548
549 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
550 {
551 return conn->smb1.server.readbraw;
552 }
553
554 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
555 {
556 return conn->smb1.server.writebraw;
557 }
558
559 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
560 {
561 return conn->smb1.server.lockread;
562 }
563
564 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
565 {
566 return conn->smb1.server.writeunlock;
567 }
568
569 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
570 {
571 return conn->smb1.server.time_zone;
572 }
573
574 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
575 const DATA_BLOB user_session_key,
576 const DATA_BLOB response)
577 {
578 return smb_signing_activate(conn->smb1.signing,
579 user_session_key,
580 response);
581 }
582
583 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
584 const uint8_t *buf, uint32_t seqnum)
585 {
586 return smb_signing_check_pdu(conn->smb1.signing, buf, seqnum);
587 }
588
589 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
590 {
591 return smb_signing_is_active(conn->smb1.signing);
592 }
593
594 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
595 struct smb_trans_enc_state *es)
596 {
597 /* Replace the old state, if any. */
598 if (conn->smb1.trans_enc) {
599 TALLOC_FREE(conn->smb1.trans_enc);
600 }
601 conn->smb1.trans_enc = es;
602 }
603
604 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
605 {
606 return common_encryption_on(conn->smb1.trans_enc);
607 }
608
609
610 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
611 {
612 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
613 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
614
615 if (NT_STATUS_IS_OK(status)) {
616 return NT_STATUS_OK;
617 }
618
619 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
620 return status;
621 }
622
623 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
624 }
625
626 /**
627 * Is the SMB command able to hold an AND_X successor
628 * @param[in] cmd The SMB command in question
629 * @retval Can we add a chained request after "cmd"?
630 */
631 bool smb1cli_is_andx_req(uint8_t cmd)
632 {
633 switch (cmd) {
634 case SMBtconX:
635 case SMBlockingX:
636 case SMBopenX:
637 case SMBreadX:
638 case SMBwriteX:
639 case SMBsesssetupX:
640 case SMBulogoffX:
641 case SMBntcreateX:
642 return true;
643 break;
644 default:
645 break;
646 }
647
648 return false;
649 }
650
651 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
652 {
653 size_t num_pending = talloc_array_length(conn->pending);
654 uint16_t result;
655
656 while (true) {
657 size_t i;
658
659 result = conn->smb1.mid++;
660 if ((result == 0) || (result == 0xffff)) {
661 continue;
662 }
663
664 for (i=0; i<num_pending; i++) {
665 if (result == smb1cli_req_mid(conn->pending[i])) {
666 break;
667 }
668 }
669
670 if (i == num_pending) {
671 return result;
672 }
673 }
674 }
675
676 void smbXcli_req_unset_pending(struct tevent_req *req)
677 {
678 struct smbXcli_req_state *state =
679 tevent_req_data(req,
680 struct smbXcli_req_state);
681 struct smbXcli_conn *conn = state->conn;
682 size_t num_pending = talloc_array_length(conn->pending);
683 size_t i;
684
685 if (state->smb1.mid != 0) {
686 /*
687 * This is a [nt]trans[2] request which waits
688 * for more than one reply.
689 */
690 return;
691 }
692
693 talloc_set_destructor(req, NULL);
694
695 if (num_pending == 1) {
696 /*
697 * The pending read_smb tevent_req is a child of
698 * conn->pending. So if nothing is pending anymore, we need to
699 * delete the socket read fde.
700 */
701 TALLOC_FREE(conn->pending);
702 conn->read_smb_req = NULL;
703 return;
704 }
705
706 for (i=0; i<num_pending; i++) {
707 if (req == conn->pending[i]) {
708 break;
709 }
710 }
711 if (i == num_pending) {
712 /*
713 * Something's seriously broken. Just returning here is the
714 * right thing nevertheless, the point of this routine is to
715 * remove ourselves from conn->pending.
716 */
717 return;
718 }
719
720 /*
721 * Remove ourselves from the conn->pending array
722 */
723 for (; i < (num_pending - 1); i++) {
724 conn->pending[i] = conn->pending[i+1];
725 }
726
727 /*
728 * No NULL check here, we're shrinking by sizeof(void *), and
729 * talloc_realloc just adjusts the size for this.
730 */
731 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
732 num_pending - 1);
733 return;
734 }
735
736 static int smbXcli_req_destructor(struct tevent_req *req)
737 {
738 struct smbXcli_req_state *state =
739 tevent_req_data(req,
740 struct smbXcli_req_state);
741
742 /*
743 * Make sure we really remove it from
744 * the pending array on destruction.
745 */
746 state->smb1.mid = 0;
747 smbXcli_req_unset_pending(req);
748 return 0;
749 }
750
751 static bool smb1cli_req_cancel(struct tevent_req *req);
752 static bool smb2cli_req_cancel(struct tevent_req *req);
753
754 static bool smbXcli_req_cancel(struct tevent_req *req)
755 {
756 struct smbXcli_req_state *state =
757 tevent_req_data(req,
758 struct smbXcli_req_state);
759
760 if (!smbXcli_conn_is_connected(state->conn)) {
761 return false;
762 }
763
764 if (state->conn->protocol == PROTOCOL_NONE) {
765 return false;
766 }
767
768 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
769 return smb2cli_req_cancel(req);
770 }
771
772 return smb1cli_req_cancel(req);
773 }
774
775 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
776
777 bool smbXcli_req_set_pending(struct tevent_req *req)
778 {
779 struct smbXcli_req_state *state =
780 tevent_req_data(req,
781 struct smbXcli_req_state);
782 struct smbXcli_conn *conn;
783 struct tevent_req **pending;
784 size_t num_pending;
785
786 conn = state->conn;
787
788 if (!smbXcli_conn_is_connected(conn)) {
789 return false;
790 }
791
792 num_pending = talloc_array_length(conn->pending);
793
794 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
795 num_pending+1);
796 if (pending == NULL) {
797 return false;
798 }
799 pending[num_pending] = req;
800 conn->pending = pending;
801 talloc_set_destructor(req, smbXcli_req_destructor);
802 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
803
804 if (!smbXcli_conn_receive_next(conn)) {
805 /*
806 * the caller should notify the current request
807 *
808 * And all other pending requests get notified
809 * by smbXcli_conn_disconnect().
810 */
811 smbXcli_req_unset_pending(req);
812 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
813 return false;
814 }
815
816 return true;
817 }
818
819 static void smbXcli_conn_received(struct tevent_req *subreq);
820
821 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
822 {
823 size_t num_pending = talloc_array_length(conn->pending);
824 struct tevent_req *req;
825 struct smbXcli_req_state *state;
826
827 if (conn->read_smb_req != NULL) {
828 return true;
829 }
830
831 if (num_pending == 0) {
832 if (conn->smb2.mid < UINT64_MAX) {
833 /* no more pending requests, so we are done for now */
834 return true;
835 }
836
837 /*
838 * If there are no more SMB2 requests possible,
839 * because we are out of message ids,
840 * we need to disconnect.
841 */
842 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
843 return true;
844 }
845
846 req = conn->pending[0];
847 state = tevent_req_data(req, struct smbXcli_req_state);
848
849 /*
850 * We're the first ones, add the read_smb request that waits for the
851 * answer from the server
852 */
853 conn->read_smb_req = read_smb_send(conn->pending,
854 state->ev,
855 conn->read_fd);
856 if (conn->read_smb_req == NULL) {
857 return false;
858 }
859 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
860 return true;
861 }
862
863 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
864 {
865 tevent_queue_stop(conn->outgoing);
866
867 if (conn->read_fd != -1) {
868 close(conn->read_fd);
869 }
870 if (conn->write_fd != -1) {
871 close(conn->write_fd);
872 }
873 conn->read_fd = -1;
874 conn->write_fd = -1;
875
876 /*
877 * Cancel all pending requests. We do not do a for-loop walking
878 * conn->pending because that array changes in
879 * smbXcli_req_unset_pending.
880 */
881 while (talloc_array_length(conn->pending) > 0) {
882 struct tevent_req *req;
883 struct smbXcli_req_state *state;
884 struct tevent_req **chain;
885 size_t num_chained;
886 size_t i;
887
888 req = conn->pending[0];
889 state = tevent_req_data(req, struct smbXcli_req_state);
890
891 if (state->smb1.chained_requests == NULL) {
892 /*
893 * We're dead. No point waiting for trans2
894 * replies.
895 */
896 state->smb1.mid = 0;
897
898 smbXcli_req_unset_pending(req);
899
900 if (NT_STATUS_IS_OK(status)) {
901 /* do not notify the callers */
902 continue;
903 }
904
905 /*
906 * we need to defer the callback, because we may notify
907 * more then one caller.
908 */
909 tevent_req_defer_callback(req, state->ev);
910 tevent_req_nterror(req, status);
911 continue;
912 }
913
914 chain = talloc_move(conn, &state->smb1.chained_requests);
915 num_chained = talloc_array_length(chain);
916
917 for (i=0; i<num_chained; i++) {
918 req = chain[i];
919 state = tevent_req_data(req, struct smbXcli_req_state);
920
921 /*
922 * We're dead. No point waiting for trans2
923 * replies.
924 */
925 state->smb1.mid = 0;
926
927 smbXcli_req_unset_pending(req);
928
929 if (NT_STATUS_IS_OK(status)) {
930 /* do not notify the callers */
931 continue;
932 }
933
934 /*
935 * we need to defer the callback, because we may notify
936 * more than one caller.
937 */
938 tevent_req_defer_callback(req, state->ev);
939 tevent_req_nterror(req, status);
940 }
941 TALLOC_FREE(chain);
942 }
943 }
944
945 /*
946 * Fetch a smb request's mid. Only valid after the request has been sent by
947 * smb1cli_req_send().
948 */
949 uint16_t smb1cli_req_mid(struct tevent_req *req)
950 {
951 struct smbXcli_req_state *state =
952 tevent_req_data(req,
953 struct smbXcli_req_state);
954
955 if (state->smb1.mid != 0) {
956 return state->smb1.mid;
957 }
958
959 return SVAL(state->smb1.hdr, HDR_MID);
960 }
961
962 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
963 {
964 struct smbXcli_req_state *state =
965 tevent_req_data(req,
966 struct smbXcli_req_state);
967
968 state->smb1.mid = mid;
969 }
970
971 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
972 {
973 struct smbXcli_req_state *state =
974 tevent_req_data(req,
975 struct smbXcli_req_state);
976
977 return state->smb1.seqnum;
978 }
979
980 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
981 {
982 struct smbXcli_req_state *state =
983 tevent_req_data(req,
984 struct smbXcli_req_state);
985
986 state->smb1.seqnum = seqnum;
987 }
988
989 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
990 {
991 size_t result = 0;
992 int i;
993 for (i=0; i<count; i++) {
994 result += iov[i].iov_len;
995 }
996 return result;
997 }
998
999 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1000 const struct iovec *iov,
1001 int count)
1002 {
1003 size_t len = smbXcli_iov_len(iov, count);
1004 size_t copied;
1005 uint8_t *buf;
1006 int i;
1007
1008 buf = talloc_array(mem_ctx, uint8_t, len);
1009 if (buf == NULL) {
1010 return NULL;
1011 }
1012 copied = 0;
1013 for (i=0; i<count; i++) {
1014 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
1015 copied += iov[i].iov_len;
1016 }
1017 return buf;
1018 }
1019
1020 static void smb1cli_req_flags(enum protocol_types protocol,
1021 uint32_t smb1_capabilities,
1022 uint8_t smb_command,
1023 uint8_t additional_flags,
1024 uint8_t clear_flags,
1025 uint8_t *_flags,
1026 uint16_t additional_flags2,
1027 uint16_t clear_flags2,
1028 uint16_t *_flags2)
1029 {
1030 uint8_t flags = 0;
1031 uint16_t flags2 = 0;
1032
1033 if (protocol >= PROTOCOL_LANMAN1) {
1034 flags |= FLAG_CASELESS_PATHNAMES;
1035 flags |= FLAG_CANONICAL_PATHNAMES;
1036 }
1037
1038 if (protocol >= PROTOCOL_LANMAN2) {
1039 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1040 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1041 }
1042
1043 if (protocol >= PROTOCOL_NT1) {
1044 flags2 |= FLAGS2_IS_LONG_NAME;
1045
1046 if (smb1_capabilities & CAP_UNICODE) {
1047 flags2 |= FLAGS2_UNICODE_STRINGS;
1048 }
1049 if (smb1_capabilities & CAP_STATUS32) {
1050 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1051 }
1052 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1053 flags2 |= FLAGS2_EXTENDED_SECURITY;
1054 }
1055 }
1056
1057 flags |= additional_flags;
1058 flags &= ~clear_flags;
1059 flags2 |= additional_flags2;
1060 flags2 &= ~clear_flags2;
1061
1062 *_flags = flags;
1063 *_flags2 = flags2;
1064 }
1065
1066 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1067
1068 static bool smb1cli_req_cancel(struct tevent_req *req)
1069 {
1070 struct smbXcli_req_state *state =
1071 tevent_req_data(req,
1072 struct smbXcli_req_state);
1073 uint8_t flags;
1074 uint16_t flags2;
1075 uint32_t pid;
1076 uint16_t tid;
1077 uint16_t uid;
1078 uint16_t mid;
1079 struct tevent_req *subreq;
1080 NTSTATUS status;
1081
1082 flags = CVAL(state->smb1.hdr, HDR_FLG);
1083 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1084 pid = SVAL(state->smb1.hdr, HDR_PID);
1085 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1086 tid = SVAL(state->smb1.hdr, HDR_TID);
1087 uid = SVAL(state->smb1.hdr, HDR_UID);
1088 mid = SVAL(state->smb1.hdr, HDR_MID);
1089
1090 subreq = smb1cli_req_create(state, state->ev,
1091 state->conn,
1092 SMBntcancel,
1093 flags, 0,
1094 flags2, 0,
1095 0, /* timeout */
1096 pid, tid, uid,
1097 0, NULL, /* vwv */
1098 0, NULL); /* bytes */
1099 if (subreq == NULL) {
1100 return false;
1101 }
1102 smb1cli_req_set_mid(subreq, mid);
1103
1104 status = smb1cli_req_chain_submit(&subreq, 1);
1105 if (!NT_STATUS_IS_OK(status)) {
1106 TALLOC_FREE(subreq);
1107 return false;
1108 }
1109 smb1cli_req_set_mid(subreq, 0);
1110
1111 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1112
1113 return true;
1114 }
1115
1116 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1117 {
1118 /* we do not care about the result */
1119 TALLOC_FREE(subreq);
1120 }
1121
1122 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1123 struct tevent_context *ev,
1124 struct smbXcli_conn *conn,
1125 uint8_t smb_command,
1126 uint8_t additional_flags,
1127 uint8_t clear_flags,
1128 uint16_t additional_flags2,
1129 uint16_t clear_flags2,
1130 uint32_t timeout_msec,
1131 uint32_t pid,
1132 uint16_t tid,
1133 uint16_t uid,
1134 uint8_t wct, uint16_t *vwv,
1135 int iov_count,
1136 struct iovec *bytes_iov)
1137 {
1138 struct tevent_req *req;
1139 struct smbXcli_req_state *state;
1140 uint8_t flags = 0;
1141 uint16_t flags2 = 0;
1142
1143 if (iov_count > MAX_SMB_IOV) {
1144 /*
1145 * Should not happen :-)
1146 */
1147 return NULL;
1148 }
1149
1150 req = tevent_req_create(mem_ctx, &state,
1151 struct smbXcli_req_state);
1152 if (req == NULL) {
1153 return NULL;
1154 }
1155 state->ev = ev;
1156 state->conn = conn;
1157
1158 state->smb1.recv_cmd = 0xFF;
1159 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1160 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1161 if (state->smb1.recv_iov == NULL) {
1162 TALLOC_FREE(req);
1163 return NULL;
1164 }
1165
1166 smb1cli_req_flags(conn->protocol,
1167 conn->smb1.capabilities,
1168 smb_command,
1169 additional_flags,
1170 clear_flags,
1171 &flags,
1172 additional_flags2,
1173 clear_flags2,
1174 &flags2);
1175
1176 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1177 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1178 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1179 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1180 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1181 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1182 SSVAL(state->smb1.hdr, HDR_TID, tid);
1183 SSVAL(state->smb1.hdr, HDR_PID, pid);
1184 SSVAL(state->smb1.hdr, HDR_UID, uid);
1185 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1186 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1187
1188 state->smb1.vwv = vwv;
1189
1190 SSVAL(state->smb1.bytecount_buf, 0, smbXcli_iov_len(bytes_iov, iov_count));
1191
1192 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1193 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1194 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1195 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1196 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1197 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1198 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1199 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1200
1201 if (iov_count != 0) {
1202 memcpy(&state->smb1.iov[4], bytes_iov,
1203 iov_count * sizeof(*bytes_iov));
1204 }
1205 state->smb1.iov_count = iov_count + 4;
1206
1207 if (timeout_msec > 0) {
1208 struct timeval endtime;
1209
1210 endtime = timeval_current_ofs_msec(timeout_msec);
1211 if (!tevent_req_set_endtime(req, ev, endtime)) {
1212 return req;
1213 }
1214 }
1215
1216 switch (smb_command) {
1217 case SMBtranss:
1218 case SMBtranss2:
1219 case SMBnttranss:
1220 state->one_way = true;
1221 break;
1222 case SMBntcancel:
1223 state->one_way = true;
1224 state->smb1.one_way_seqnum = true;
1225 break;
1226 case SMBlockingX:
1227 if ((wct == 8) &&
1228 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1229 state->one_way = true;
1230 }
1231 break;
1232 }
1233
1234 return req;
1235 }
1236
1237 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1238 struct iovec *iov, int iov_count,
1239 uint32_t *seqnum,
1240 bool one_way_seqnum)
1241 {
1242 TALLOC_CTX *frame = NULL;
1243 uint8_t *buf;
1244
1245 /*
1246 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1247 * iovec directly. MD5Update would do that just fine.
1248 */
1249
1250 if (iov_count < 4) {
1251 return NT_STATUS_INVALID_PARAMETER_MIX;
1252 }
1253 if (iov[0].iov_len != NBT_HDR_SIZE) {
1254 return NT_STATUS_INVALID_PARAMETER_MIX;
1255 }
1256 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1257 return NT_STATUS_INVALID_PARAMETER_MIX;
1258 }
1259 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1260 return NT_STATUS_INVALID_PARAMETER_MIX;
1261 }
1262 if (iov[3].iov_len != sizeof(uint16_t)) {
1263 return NT_STATUS_INVALID_PARAMETER_MIX;
1264 }
1265
1266 frame = talloc_stackframe();
1267
1268 buf = smbXcli_iov_concat(frame, iov, iov_count);
1269 if (buf == NULL) {
1270 return NT_STATUS_NO_MEMORY;
1271 }
1272
1273 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1274 one_way_seqnum);
1275 smb_signing_sign_pdu(conn->smb1.signing, buf, *seqnum);
1276 memcpy(iov[1].iov_base, buf+4, iov[1].iov_len);
1277
1278 TALLOC_FREE(frame);
1279 return NT_STATUS_OK;
1280 }
1281
1282 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1283 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1284 TALLOC_CTX *tmp_mem,
1285 uint8_t *inbuf);
1286
1287 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1288 struct smbXcli_req_state *state,
1289 struct iovec *iov, int iov_count)
1290 {
1291 struct tevent_req *subreq;
1292 NTSTATUS status;
1293 uint8_t cmd;
1294 uint16_t mid;
1295
1296 if (!smbXcli_conn_is_connected(state->conn)) {
1297 return NT_STATUS_CONNECTION_DISCONNECTED;
1298 }
1299
1300 if (state->conn->protocol > PROTOCOL_NT1) {
1301 return NT_STATUS_REVISION_MISMATCH;
1302 }
1303
1304 if (iov_count < 4) {
1305 return NT_STATUS_INVALID_PARAMETER_MIX;
1306 }
1307 if (iov[0].iov_len != NBT_HDR_SIZE) {
1308 return NT_STATUS_INVALID_PARAMETER_MIX;
1309 }
1310 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1311 return NT_STATUS_INVALID_PARAMETER_MIX;
1312 }
1313 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1314 return NT_STATUS_INVALID_PARAMETER_MIX;
1315 }
1316 if (iov[3].iov_len != sizeof(uint16_t)) {
1317 return NT_STATUS_INVALID_PARAMETER_MIX;
1318 }
1319
1320 cmd = CVAL(iov[1].iov_base, HDR_COM);
1321 if (cmd == SMBreadBraw) {
1322 if (smbXcli_conn_has_async_calls(state->conn)) {
1323 return NT_STATUS_INVALID_PARAMETER_MIX;
1324 }
1325 state->conn->smb1.read_braw_req = req;
1326 }
1327
1328 if (state->smb1.mid != 0) {
1329 mid = state->smb1.mid;
1330 } else {
1331 mid = smb1cli_alloc_mid(state->conn);
1332 }
1333 SSVAL(iov[1].iov_base, HDR_MID, mid);
1334
1335 _smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
1336
1337 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1338 &state->smb1.seqnum,
1339 state->smb1.one_way_seqnum);
1340
1341 if (!NT_STATUS_IS_OK(status)) {
1342 return status;
1343 }
1344
1345 /*
1346 * If we supported multiple encrytion contexts
1347 * here we'd look up based on tid.
1348 */
1349 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1350 char *buf, *enc_buf;
1351
1352 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1353 if (buf == NULL) {
1354 return NT_STATUS_NO_MEMORY;
1355 }
1356 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1357 (char *)buf, &enc_buf);
1358 TALLOC_FREE(buf);
1359 if (!NT_STATUS_IS_OK(status)) {
1360 DEBUG(0, ("Error in encrypting client message: %s\n",
1361 nt_errstr(status)));
1362 return status;
1363 }
1364 buf = (char *)talloc_memdup(state, enc_buf,
1365 smb_len_nbt(enc_buf)+4);
1366 SAFE_FREE(enc_buf);
1367 if (buf == NULL) {
1368 return NT_STATUS_NO_MEMORY;
1369 }
1370 iov[0].iov_base = (void *)buf;
1371 iov[0].iov_len = talloc_get_size(buf);
1372 iov_count = 1;
1373 }
1374
1375 if (state->conn->dispatch_incoming == NULL) {
1376 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1377 }
1378
1379 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1380
1381 subreq = writev_send(state, state->ev, state->conn->outgoing,
1382 state->conn->write_fd, false, iov, iov_count);
1383 if (subreq == NULL) {
1384 return NT_STATUS_NO_MEMORY;
1385 }
1386 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1387 return NT_STATUS_OK;
1388 }
1389
1390 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1391 struct tevent_context *ev,
1392 struct smbXcli_conn *conn,
1393 uint8_t smb_command,
1394 uint8_t additional_flags,
1395 uint8_t clear_flags,
1396 uint16_t additional_flags2,
1397 uint16_t clear_flags2,
1398 uint32_t timeout_msec,
1399 uint32_t pid,
1400 uint16_t tid,
1401 uint16_t uid,
1402 uint8_t wct, uint16_t *vwv,
1403 uint32_t num_bytes,
1404 const uint8_t *bytes)
1405 {
1406 struct tevent_req *req;
1407 struct iovec iov;
1408 NTSTATUS status;
1409
1410 iov.iov_base = discard_const_p(void, bytes);
1411 iov.iov_len = num_bytes;
1412
1413 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1414 additional_flags, clear_flags,
1415 additional_flags2, clear_flags2,
1416 timeout_msec,
1417 pid, tid, uid,
1418 wct, vwv, 1, &iov);
1419 if (req == NULL) {
1420 return NULL;
1421 }
1422 if (!tevent_req_is_in_progress(req)) {
1423 return tevent_req_post(req, ev);
1424 }
1425 status = smb1cli_req_chain_submit(&req, 1);
1426 if (tevent_req_nterror(req, status)) {
1427 return tevent_req_post(req, ev);
1428 }
1429 return req;
1430 }
1431
1432 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1433 {
1434 struct tevent_req *req =
1435 tevent_req_callback_data(subreq,
1436 struct tevent_req);
1437 struct smbXcli_req_state *state =
1438 tevent_req_data(req,
1439 struct smbXcli_req_state);
1440 ssize_t nwritten;
1441 int err;
1442
1443 nwritten = writev_recv(subreq, &err);
1444 TALLOC_FREE(subreq);
1445 if (nwritten == -1) {
1446 NTSTATUS status = map_nt_error_from_unix_common(err);
1447 smbXcli_conn_disconnect(state->conn, status);
1448 return;
1449 }
1450
1451 if (state->one_way) {
1452 state->inbuf = NULL;
1453 tevent_req_done(req);
1454 return;
1455 }
1456
1457 if (!smbXcli_req_set_pending(req)) {
1458 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1459 return;
1460 }
1461 }
1462
1463 static void smbXcli_conn_received(struct tevent_req *subreq)
1464 {
1465 struct smbXcli_conn *conn =
1466 tevent_req_callback_data(subreq,
1467 struct smbXcli_conn);
1468 TALLOC_CTX *frame = talloc_stackframe();
1469 NTSTATUS status;
1470 uint8_t *inbuf;
1471 ssize_t received;
1472 int err;
1473
1474 if (subreq != conn->read_smb_req) {
1475 DEBUG(1, ("Internal error: cli_smb_received called with "
1476 "unexpected subreq\n"));
1477 status = NT_STATUS_INTERNAL_ERROR;
1478 smbXcli_conn_disconnect(conn, status);
1479 TALLOC_FREE(frame);
1480 return;
1481 }
1482 conn->read_smb_req = NULL;
1483
1484 received = read_smb_recv(subreq, frame, &inbuf, &err);
1485 TALLOC_FREE(subreq);
1486 if (received == -1) {
1487 status = map_nt_error_from_unix_common(err);
1488 smbXcli_conn_disconnect(conn, status);
1489 TALLOC_FREE(frame);
1490 return;
1491 }
1492
1493 status = conn->dispatch_incoming(conn, frame, inbuf);
1494 TALLOC_FREE(frame);
1495 if (NT_STATUS_IS_OK(status)) {
1496 /*
1497 * We should not do any more processing
1498 * as the dispatch function called
1499 * tevent_req_done().
1500 */
1501 return;
1502 } else if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1503 /*
1504 * We got an error, so notify all pending requests
1505 */
1506 smbXcli_conn_disconnect(conn, status);
1507 return;
1508 }
1509
1510 /*
1511 * We got NT_STATUS_RETRY, so we may ask for a
1512 * next incoming pdu.
1513 */
1514 if (!smbXcli_conn_receive_next(conn)) {
1515 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1516 }
1517 }
1518
1519 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1520 struct iovec **piov, int *pnum_iov)
1521 {
1522 struct iovec *iov;
1523 int num_iov;
1524 size_t buflen;
1525 size_t taken;
1526 size_t remaining;
1527 uint8_t *hdr;
1528 uint8_t cmd;
1529 uint32_t wct_ofs;
1530
1531 buflen = smb_len_nbt(buf);
1532 taken = 0;
1533
1534 hdr = buf + NBT_HDR_SIZE;
1535
1536 if (buflen < MIN_SMB_SIZE) {
1537 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1538 }
1539
1540 /*
1541 * This returns iovec elements in the following order:
1542 *
1543 * - SMB header
1544 *
1545 * - Parameter Block
1546 * - Data Block
1547 *
1548 * - Parameter Block
1549 * - Data Block
1550 *
1551 * - Parameter Block
1552 * - Data Block
1553 */
1554 num_iov = 1;
1555
1556 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1557 if (iov == NULL) {
1558 return NT_STATUS_NO_MEMORY;
1559 }
1560 iov[0].iov_base = hdr;
1561 iov[0].iov_len = HDR_WCT;
1562 taken += HDR_WCT;
1563
1564 cmd = CVAL(hdr, HDR_COM);
1565 wct_ofs = HDR_WCT;
1566
1567 while (true) {
1568 size_t len = buflen - taken;
1569 struct iovec *cur;
1570 struct iovec *iov_tmp;
1571 uint8_t wct;
1572 uint32_t bcc_ofs;
1573 uint16_t bcc;
1574 size_t needed;
1575
1576 /*
1577 * we need at least WCT and BCC
1578 */
1579 needed = sizeof(uint8_t) + sizeof(uint16_t);
1580 if (len < needed) {
1581 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1582 __location__, (int)len, (int)needed));
1583 goto inval;
1584 }
1585
1586 /*
1587 * Now we check if the specified words are there
1588 */
1589 wct = CVAL(hdr, wct_ofs);
1590 needed += wct * sizeof(uint16_t);
1591 if (len < needed) {
1592 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1593 __location__, (int)len, (int)needed));
1594 goto inval;
1595 }
1596
1597 /*
1598 * Now we check if the specified bytes are there
1599 */
1600 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1601 bcc = SVAL(hdr, bcc_ofs);
1602 needed += bcc * sizeof(uint8_t);
1603 if (len < needed) {
1604 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1605 __location__, (int)len, (int)needed));
1606 goto inval;
1607 }
1608
1609 /*
1610 * we allocate 2 iovec structures for words and bytes
1611 */
1612 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1613 num_iov + 2);
1614 if (iov_tmp == NULL) {
1615 TALLOC_FREE(iov);
1616 return NT_STATUS_NO_MEMORY;
1617 }
1618 iov = iov_tmp;
1619 cur = &iov[num_iov];
1620 num_iov += 2;
1621
1622 cur[0].iov_len = wct * sizeof(uint16_t);
1623 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1624 cur[1].iov_len = bcc * sizeof(uint8_t);
1625 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1626
1627 taken += needed;
1628
1629 if (!smb1cli_is_andx_req(cmd)) {
1630 /*
1631 * If the current command does not have AndX chanining
1632 * we are done.
1633 */
1634 break;
1635 }
1636
1637 if (wct == 0 && bcc == 0) {
1638 /*
1639 * An empty response also ends the chain,
1640 * most likely with an error.
1641 */
1642 break;
1643 }
1644
1645 if (wct < 2) {
1646 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1647 __location__, (int)wct, (int)cmd));
1648 goto inval;
1649 }
1650 cmd = CVAL(cur[0].iov_base, 0);
1651 if (cmd == 0xFF) {
1652 /*
1653 * If it is the end of the chain we are also done.
1654 */
1655 break;
1656 }
1657 wct_ofs = SVAL(cur[0].iov_base, 2);
1658
1659 if (wct_ofs < taken) {
1660 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1661 }
1662 if (wct_ofs > buflen) {
1663 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1664 }
1665
1666 /*
1667 * we consumed everything up to the start of the next
1668 * parameter block.
1669 */
1670 taken = wct_ofs;
1671 }
1672
1673 remaining = buflen - taken;
1674
1675 if (remaining > 0 && num_iov >= 3) {
1676 /*
1677 * The last DATA block gets the remaining
1678 * bytes, this is needed to support
1679 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1680 */
1681 iov[num_iov-1].iov_len += remaining;
1682 }
1683
1684 *piov = iov;
1685 *pnum_iov = num_iov;
1686 return NT_STATUS_OK;
1687
1688 inval:
1689 TALLOC_FREE(iov);
1690 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1691 }
1692
1693 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1694 TALLOC_CTX *tmp_mem,
1695 uint8_t *inbuf)
1696 {
1697 struct tevent_req *req;
1698 struct smbXcli_req_state *state;
1699 NTSTATUS status;
1700 size_t num_pending;
1701 size_t i;
1702 uint8_t cmd;
1703 uint16_t mid;
1704 bool oplock_break;
1705 const uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1706 struct iovec *iov = NULL;
1707 int num_iov = 0;
1708 struct tevent_req **chain = NULL;
1709 size_t num_chained = 0;
1710 size_t num_responses = 0;
1711
1712 if (conn->smb1.read_braw_req != NULL) {
1713 req = conn->smb1.read_braw_req;
1714 conn->smb1.read_braw_req = NULL;
1715 state = tevent_req_data(req, struct smbXcli_req_state);
1716
1717 smbXcli_req_unset_pending(req);
1718
1719 if (state->smb1.recv_iov == NULL) {
1720 /*
1721 * For requests with more than
1722 * one response, we have to readd the
1723 * recv_iov array.
1724 */
1725 state->smb1.recv_iov = talloc_zero_array(state,
1726 struct iovec,
1727 3);
1728 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1729 return NT_STATUS_OK;
1730 }
1731 }
1732
1733 state->smb1.recv_iov[0].iov_base = (void *)(inbuf + NBT_HDR_SIZE);
1734 state->smb1.recv_iov[0].iov_len = smb_len_nbt(inbuf);
1735 ZERO_STRUCT(state->smb1.recv_iov[1]);
1736 ZERO_STRUCT(state->smb1.recv_iov[2]);
1737
1738 state->smb1.recv_cmd = SMBreadBraw;
1739 state->smb1.recv_status = NT_STATUS_OK;
1740 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1741
1742 tevent_req_done(req);
1743 return NT_STATUS_OK;
1744 }
1745
1746 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1747 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1748 DEBUG(10, ("Got non-SMB PDU\n"));
1749 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1750 }
1751
1752 /*
1753 * If we supported multiple encrytion contexts
1754 * here we'd look up based on tid.
1755 */
1756 if (common_encryption_on(conn->smb1.trans_enc)
1757 && (CVAL(inbuf, 0) == 0)) {
1758 uint16_t enc_ctx_num;
1759
1760 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1761 if (!NT_STATUS_IS_OK(status)) {
1762 DEBUG(10, ("get_enc_ctx_num returned %s\n",
1763 nt_errstr(status)));
1764 return status;
1765 }
1766
1767 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1768 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1769 enc_ctx_num,
1770 conn->smb1.trans_enc->enc_ctx_num));
1771 return NT_STATUS_INVALID_HANDLE;
1772 }
1773
1774 status = common_decrypt_buffer(conn->smb1.trans_enc,
1775 (char *)inbuf);
1776 if (!NT_STATUS_IS_OK(status)) {
1777 DEBUG(10, ("common_decrypt_buffer returned %s\n",
1778 nt_errstr(status)));
1779 return status;
1780 }
1781 }
1782
1783 mid = SVAL(inhdr, HDR_MID);
1784 num_pending = talloc_array_length(conn->pending);
1785
1786 for (i=0; i<num_pending; i++) {
1787 if (mid == smb1cli_req_mid(conn->pending[i])) {
1788 break;
1789 }
1790 }
1791 if (i == num_pending) {
1792 /* Dump unexpected reply */
1793 return NT_STATUS_RETRY;
1794 }
1795
1796 oplock_break = false;
1797
1798 if (mid == 0xffff) {
1799 /*
1800 * Paranoia checks that this is really an oplock break request.
1801 */
1802 oplock_break = (smb_len_nbt(inbuf) == 51); /* hdr + 8 words */
1803 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
1804 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
1805 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
1806 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
1807
1808 if (!oplock_break) {
1809 /* Dump unexpected reply */
1810 return NT_STATUS_RETRY;
1811 }
1812 }
1813
1814 req = conn->pending[i];
1815 state = tevent_req_data(req, struct smbXcli_req_state);
1816
1817 if (!oplock_break /* oplock breaks are not signed */
1818 && !smb_signing_check_pdu(conn->smb1.signing,
1819 inbuf, state->smb1.seqnum+1)) {
1820 DEBUG(10, ("cli_check_sign_mac failed\n"));
1821 return NT_STATUS_ACCESS_DENIED;
1822 }
1823
1824 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
1825 &iov, &num_iov);
1826 if (!NT_STATUS_IS_OK(status)) {
1827 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
1828 nt_errstr(status)));
1829 return status;
1830 }
1831
1832 cmd = CVAL(inhdr, HDR_COM);
1833 status = smb1cli_pull_raw_error(inhdr);
1834
1835 if (state->smb1.chained_requests == NULL) {
1836 if (num_iov != 3) {
1837 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1838 }
1839
1840 smbXcli_req_unset_pending(req);
1841
1842 if (state->smb1.recv_iov == NULL) {
1843 /*
1844 * For requests with more than
1845 * one response, we have to readd the
1846 * recv_iov array.
1847 */
1848 state->smb1.recv_iov = talloc_zero_array(state,
1849 struct iovec,
1850 3);
1851 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1852 return NT_STATUS_OK;
1853 }
1854 }
1855
1856 state->smb1.recv_cmd = cmd;
1857 state->smb1.recv_status = status;
1858 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1859
1860 state->smb1.recv_iov[0] = iov[0];
1861 state->smb1.recv_iov[1] = iov[1];
1862 state->smb1.recv_iov[2] = iov[2];
1863
1864 if (talloc_array_length(conn->pending) == 0) {
1865 tevent_req_done(req);
1866 return NT_STATUS_OK;
1867 }
1868
1869 tevent_req_defer_callback(req, state->ev);
1870 tevent_req_done(req);
1871 return NT_STATUS_RETRY;
1872 }
1873
1874 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
1875 num_chained = talloc_array_length(chain);
1876 num_responses = (num_iov - 1)/2;
1877
1878 if (num_responses > num_chained) {
1879 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1880 }
1881
1882 for (i=0; i<num_chained; i++) {
1883 size_t iov_idx = 1 + (i*2);
1884 struct iovec *cur = &iov[iov_idx];
1885 uint8_t *inbuf_ref;
1886
1887 req = chain[i];
1888 state = tevent_req_data(req, struct smbXcli_req_state);
1889
1890 smbXcli_req_unset_pending(req);
1891
1892 /*
1893 * as we finish multiple requests here
1894 * we need to defer the callbacks as
1895 * they could destroy our current stack state.
1896 */
1897 tevent_req_defer_callback(req, state->ev);
1898
1899 if (i >= num_responses) {
1900 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
1901 continue;
1902 }
1903
1904 if (state->smb1.recv_iov == NULL) {
1905 /*
1906 * For requests with more than
1907 * one response, we have to readd the
1908 * recv_iov array.
1909 */
1910 state->smb1.recv_iov = talloc_zero_array(state,
1911 struct iovec,
1912 3);
1913 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1914 continue;
1915 }
1916 }
1917
1918 state->smb1.recv_cmd = cmd;
1919
1920 if (i == (num_responses - 1)) {
1921 /*
1922 * The last request in the chain gets the status
1923 */
1924 state->smb1.recv_status = status;
1925 } else {
1926 cmd = CVAL(cur[0].iov_base, 0);
1927 state->smb1.recv_status = NT_STATUS_OK;
1928 }
1929
1930 state->inbuf = inbuf;
1931
1932 /*
1933 * Note: here we use talloc_reference() in a way
1934 * that does not expose it to the caller.
1935 */
1936 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
1937 if (tevent_req_nomem(inbuf_ref, req)) {
1938 continue;
1939 }
1940
1941 /* copy the related buffers */
1942 state->smb1.recv_iov[0] = iov[0];
1943 state->smb1.recv_iov[1] = cur[0];
1944 state->smb1.recv_iov[2] = cur[1];
1945
1946 tevent_req_done(req);
1947 }
1948
1949 return NT_STATUS_RETRY;
1950 }
1951
1952 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
1953 TALLOC_CTX *mem_ctx,
1954 struct iovec **piov,
1955 uint8_t **phdr,
1956 uint8_t *pwct,
1957 uint16_t **pvwv,
1958 uint32_t *pvwv_offset,
1959 uint32_t *pnum_bytes,
1960 uint8_t **pbytes,
1961 uint32_t *pbytes_offset,
1962 uint8_t **pinbuf,
1963 const struct smb1cli_req_expected_response *expected,
1964 size_t num_expected)
1965 {
1966 struct smbXcli_req_state *state =
1967 tevent_req_data(req,
1968 struct smbXcli_req_state);
1969 NTSTATUS status = NT_STATUS_OK;
1970 struct iovec *recv_iov = NULL;
1971 uint8_t *hdr = NULL;
1972 uint8_t wct = 0;
1973 uint32_t vwv_offset = 0;
1974 uint16_t *vwv = NULL;
1975 uint32_t num_bytes = 0;
1976 uint32_t bytes_offset = 0;
1977 uint8_t *bytes = NULL;
1978 size_t i;
1979 bool found_status = false;
1980 bool found_size = false;
1981
1982 if (piov != NULL) {
1983 *piov = NULL;
1984 }
1985 if (phdr != NULL) {
1986 *phdr = 0;
1987 }
1988 if (pwct != NULL) {
1989 *pwct = 0;
1990 }
1991 if (pvwv != NULL) {
1992 *pvwv = NULL;
1993 }
1994 if (pvwv_offset != NULL) {
1995 *pvwv_offset = 0;
1996 }
1997 if (pnum_bytes != NULL) {
1998 *pnum_bytes = 0;
1999 }
2000 if (pbytes != NULL) {
2001 *pbytes = NULL;
2002 }
2003 if (pbytes_offset != NULL) {
2004 *pbytes_offset = 0;
2005 }
2006 if (pinbuf != NULL) {
2007 *pinbuf = NULL;
2008 }
2009
2010 if (state->inbuf != NULL) {
2011 recv_iov = state->smb1.recv_iov;
2012 state->smb1.recv_iov = NULL;
2013 if (state->smb1.recv_cmd != SMBreadBraw) {
2014 hdr = (uint8_t *)recv_iov[0].iov_base;
2015 wct = recv_iov[1].iov_len/2;
2016 vwv = (uint16_t *)recv_iov[1].iov_base;
2017 vwv_offset = PTR_DIFF(vwv, hdr);
2018 num_bytes = recv_iov[2].iov_len;
2019 bytes = (uint8_t *)recv_iov[2].iov_base;
2020 bytes_offset = PTR_DIFF(bytes, hdr);
2021 }
2022 }
2023
2024 if (tevent_req_is_nterror(req, &status)) {
2025 for (i=0; i < num_expected; i++) {
2026 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2027 found_status = true;
2028 break;
2029 }
2030 }
2031
2032 if (found_status) {
2033 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2034 }
2035
2036 return status;
2037 }
2038
2039 if (num_expected == 0) {
2040 found_status = true;
2041 found_size = true;
2042 }
2043
2044 status = state->smb1.recv_status;
2045
2046 for (i=0; i < num_expected; i++) {
2047 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2048 continue;
2049 }
2050
2051 found_status = true;
2052 if (expected[i].wct == 0) {
2053 found_size = true;
2054 break;
2055 }
2056
2057 if (expected[i].wct == wct) {
2058 found_size = true;
2059 break;
2060 }
2061 }
2062
2063 if (!found_status) {
2064 return status;
2065 }
2066
2067 if (!found_size) {
2068 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2069 }
2070
2071 if (piov != NULL) {
2072 *piov = talloc_move(mem_ctx, &recv_iov);
2073 }
2074
2075 if (phdr != NULL) {
2076 *phdr = hdr;
2077 }
2078 if (pwct != NULL) {
2079 *pwct = wct;
2080 }
2081 if (pvwv != NULL) {
2082 *pvwv = vwv;
2083 }
2084 if (pvwv_offset != NULL) {
2085 *pvwv_offset = vwv_offset;
2086 }
2087 if (pnum_bytes != NULL) {
2088 *pnum_bytes = num_bytes;
2089 }
2090 if (pbytes != NULL) {
2091 *pbytes = bytes;
2092 }
2093 if (pbytes_offset != NULL) {
2094 *pbytes_offset = bytes_offset;
2095 }
2096 if (pinbuf != NULL) {
2097 *pinbuf = state->inbuf;
2098 }
2099
2100 return status;
2101 }
2102
2103 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2104 {
2105 size_t wct_ofs;
2106 int i;
2107
2108 wct_ofs = HDR_WCT;
2109
2110 for (i=0; i<num_reqs; i++) {
2111 struct smbXcli_req_state *state;
2112 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2113 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2114 state->smb1.iov_count-2);
2115 wct_ofs = (wct_ofs + 3) & ~3;
2116 }
2117 return wct_ofs;
2118 }
2119
2120 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2121 {
2122 struct smbXcli_req_state *first_state =
2123 tevent_req_data(reqs[0],
2124 struct smbXcli_req_state);
2125 struct smbXcli_req_state *state;
2126 size_t wct_offset;
2127 size_t chain_padding = 0;
2128 int i, iovlen;
2129 struct iovec *iov = NULL;
2130 struct iovec *this_iov;
2131 NTSTATUS status;
2132 size_t nbt_len;
2133
2134 if (num_reqs == 1) {
2135 return smb1cli_req_writev_submit(reqs[0], first_state,
2136 first_state->smb1.iov,
2137 first_state->smb1.iov_count);
2138 }
2139
2140 iovlen = 0;
2141 for (i=0; i<num_reqs; i++) {
2142 if (!tevent_req_is_in_progress(reqs[i])) {
2143 return NT_STATUS_INTERNAL_ERROR;
2144 }
2145
2146 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2147
2148 if (state->smb1.iov_count < 4) {
2149 return NT_STATUS_INVALID_PARAMETER_MIX;
2150 }
2151
2152 if (i == 0) {
2153 /*
2154 * The NBT and SMB header
2155 */
2156 iovlen += 2;
2157 } else {
2158 /*
2159 * Chain padding
2160 */
2161 iovlen += 1;
2162 }
2163
2164 /*
2165 * words and bytes
2166 */
2167 iovlen += state->smb1.iov_count - 2;
2168 }
2169
2170 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2171 if (iov == NULL) {
2172 return NT_STATUS_NO_MEMORY;
2173 }
2174
2175 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2176 first_state, reqs, sizeof(*reqs) * num_reqs);
2177 if (first_state->smb1.chained_requests == NULL) {
2178 TALLOC_FREE(iov);
2179 return NT_STATUS_NO_MEMORY;
2180 }
2181
2182 wct_offset = HDR_WCT;
2183 this_iov = iov;
2184
2185 for (i=0; i<num_reqs; i++) {
2186 size_t next_padding = 0;
2187 uint16_t *vwv;
2188
2189 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2190
2191 if (i < num_reqs-1) {
2192 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2193 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2194 TALLOC_FREE(iov);
2195 TALLOC_FREE(first_state->smb1.chained_requests);
2196 return NT_STATUS_INVALID_PARAMETER_MIX;
2197 }
2198 }
2199
2200 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2201 state->smb1.iov_count-2) + 1;
2202 if ((wct_offset % 4) != 0) {
2203 next_padding = 4 - (wct_offset % 4);
2204 }
2205 wct_offset += next_padding;
2206 vwv = state->smb1.vwv;
2207
2208 if (i < num_reqs-1) {
2209 struct smbXcli_req_state *next_state =
2210 tevent_req_data(reqs[i+1],
2211 struct smbXcli_req_state);
2212 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2213 SCVAL(vwv+0, 1, 0);
2214 SSVAL(vwv+1, 0, wct_offset);
2215 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2216 /* properly end the chain */
2217 SCVAL(vwv+0, 0, 0xff);
2218 SCVAL(vwv+0, 1, 0xff);
2219 SSVAL(vwv+1, 0, 0);
2220 }
2221
2222 if (i == 0) {
2223 /*
2224 * The NBT and SMB header
2225 */
2226 this_iov[0] = state->smb1.iov[0];
2227 this_iov[1] = state->smb1.iov[1];
2228 this_iov += 2;
2229 } else {
2230 /*
2231 * This one is a bit subtle. We have to add
2232 * chain_padding bytes between the requests, and we
2233 * have to also include the wct field of the
2234 * subsequent requests. We use the subsequent header
2235 * for the padding, it contains the wct field in its
2236 * last byte.
2237 */
2238 this_iov[0].iov_len = chain_padding+1;
2239 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2240 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2241 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2242 this_iov += 1;
2243 }
2244
2245 /*
2246 * copy the words and bytes
2247 */
2248 memcpy(this_iov, state->smb1.iov+2,
2249 sizeof(struct iovec) * (state->smb1.iov_count-2));
2250 this_iov += state->smb1.iov_count - 2;
2251 chain_padding = next_padding;
2252 }
2253
2254 nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
2255 if (nbt_len > first_state->conn->smb1.max_xmit) {
2256 TALLOC_FREE(iov);
2257 TALLOC_FREE(first_state->smb1.chained_requests);
2258 return NT_STATUS_INVALID_PARAMETER_MIX;
2259 }
2260
2261 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2262 if (!NT_STATUS_IS_OK(status)) {
2263 TALLOC_FREE(iov);
2264 TALLOC_FREE(first_state->smb1.chained_requests);
2265 return status;
2266 }
2267
2268 return NT_STATUS_OK;
2269 }
2270
2271 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2272 {
2273 return ((tevent_queue_length(conn->outgoing) != 0)
2274 || (talloc_array_length(conn->pending) != 0));
2275 }
2276
2277 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2278 {
2279 return conn->smb2.server.capabilities;
2280 }
2281
2282 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2283 {
2284 return conn->smb2.server.security_mode;
2285 }
2286
2287 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2288 {
2289 return conn->smb2.server.max_trans_size;
2290 }
2291
2292 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2293 {
2294 return conn->smb2.server.max_read_size;
2295 }
2296
2297 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2298 {
2299 return conn->smb2.server.max_write_size;
2300 }
2301
2302 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2303 uint16_t max_credits)
2304 {
2305 conn->smb2.max_credits = max_credits;
2306 }
2307
2308 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2309
2310 static bool smb2cli_req_cancel(struct tevent_req *req)
2311 {
2312 struct smbXcli_req_state *state =
2313 tevent_req_data(req,
2314 struct smbXcli_req_state);
2315 uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2316 uint32_t pid = IVAL(state->smb2.hdr, SMB2_HDR_PID);
2317 uint32_t tid = IVAL(state->smb2.hdr, SMB2_HDR_TID);
2318 uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2319 uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
2320 struct smbXcli_session *session = state->session;
2321 uint8_t *fixed = state->smb2.pad;
2322 uint16_t fixed_len = 4;
2323 struct tevent_req *subreq;
2324 struct smbXcli_req_state *substate;
2325 NTSTATUS status;
2326
2327 SSVAL(fixed, 0, 0x04);
2328 SSVAL(fixed, 2, 0);
2329
2330 subreq = smb2cli_req_create(state, state->ev,
2331 state->conn,
2332 SMB2_OP_CANCEL,
2333 flags, 0,
2334 0, /* timeout */
2335 pid, tid, session,
2336 fixed, fixed_len,
2337 NULL, 0);
2338 if (subreq == NULL) {
2339 return false;
2340 }
2341 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2342
2343 if (flags & SMB2_HDR_FLAG_ASYNC) {
2344 mid = 0;
2345 }
2346
2347 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
2348 SIVAL(substate->smb2.hdr, SMB2_HDR_PID, pid);
2349 SIVAL(substate->smb2.hdr, SMB2_HDR_TID, tid);
2350 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2351 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
2352
2353 status = smb2cli_req_compound_submit(&subreq, 1);
2354 if (!NT_STATUS_IS_OK(status)) {
2355 TALLOC_FREE(subreq);
2356 return false;
2357 }
2358
2359 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2360
2361 return true;
2362 }
2363
2364 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2365 {
2366 /* we do not care about the result */
2367 TALLOC_FREE(subreq);
2368 }
2369
2370 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2371 struct tevent_context *ev,
2372 struct smbXcli_conn *conn,
2373 uint16_t cmd,
2374 uint32_t additional_flags,
2375 uint32_t clear_flags,
2376 uint32_t timeout_msec,
2377 uint32_t pid,
2378 uint32_t tid,
2379 struct smbXcli_session *session,
2380 const uint8_t *fixed,
2381 uint16_t fixed_len,
2382 const uint8_t *dyn,
2383 uint32_t dyn_len)
2384 {
2385 struct tevent_req *req;
2386 struct smbXcli_req_state *state;
2387 uint32_t flags = 0;
2388 uint64_t uid = 0;
2389
2390 req = tevent_req_create(mem_ctx, &state,
2391 struct smbXcli_req_state);
2392 if (req == NULL) {
2393 return NULL;
2394 }
2395
2396 state->ev = ev;
2397 state->conn = conn;
2398 state->session = session;
2399
2400 if (session) {
2401 uid = session->smb2.session_id;
2402 }
2403
2404 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2405 if (state->smb2.recv_iov == NULL) {
2406 TALLOC_FREE(req);
2407 return NULL;
2408 }
2409
2410 flags |= additional_flags;
2411 flags &= ~clear_flags;
2412
2413 state->smb2.fixed = fixed;
2414 state->smb2.fixed_len = fixed_len;
2415 state->smb2.dyn = dyn;
2416 state->smb2.dyn_len = dyn_len;
2417
2418 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
2419 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
2420 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
2421 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
2422 SIVAL(state->smb2.hdr, SMB2_HDR_PID, pid);
2423 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
2424 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
2425
2426 switch (cmd) {
2427 case SMB2_OP_CANCEL:
2428 state->one_way = true;
2429 break;
2430 case SMB2_OP_BREAK:
2431 /*
2432 * If this is a dummy request, it will have
2433 * UINT64_MAX as message id.
2434 * If we send on break acknowledgement,
2435 * this gets overwritten later.
2436 */
2437 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2438 break;
2439 }
2440
2441 if (timeout_msec > 0) {
2442 struct timeval endtime;
2443
2444 endtime = timeval_current_ofs_msec(timeout_msec);
2445 if (!tevent_req_set_endtime(req, ev, endtime)) {
2446 return req;
2447 }
2448 }
2449
2450 return req;
2451 }
2452
2453 void smb2cli_req_set_notify_async(struct tevent_req *req)
2454 {
2455 struct smbXcli_req_state *state =
2456 tevent_req_data(req,
2457 struct smbXcli_req_state);
2458
2459 state->smb2.notify_async = true;
2460 }
2461
2462 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2463 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2464 TALLOC_CTX *tmp_mem,
2465 uint8_t *inbuf);
2466
2467 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2468 int num_reqs)
2469 {
2470 struct smbXcli_req_state *state;
2471 struct tevent_req *subreq;
2472 struct iovec *iov;
2473 int i, num_iov, nbt_len;
2474
2475 /*
2476 * 1 for the nbt length
2477 * per request: HDR, fixed, dyn, padding
2478 * -1 because the last one does not need padding
2479 */
2480
2481 iov = talloc_array(reqs[0], struct iovec, 1 + 4*num_reqs - 1);
2482 if (iov == NULL) {
2483 return NT_STATUS_NO_MEMORY;
2484 }
2485
2486 num_iov = 1;
2487 nbt_len = 0;
2488
2489 for (i=0; i<num_reqs; i++) {
2490 int hdr_iov;
2491 size_t reqlen;
2492 bool ret;
2493 uint16_t opcode;
2494 uint64_t avail;
2495 uint16_t charge;
2496 uint16_t credits;
2497 uint64_t mid;
2498 const DATA_BLOB *signing_key = NULL;
2499
2500 if (!tevent_req_is_in_progress(reqs[i])) {
2501 return NT_STATUS_INTERNAL_ERROR;
2502 }
2503
2504 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2505
2506 if (!smbXcli_conn_is_connected(state->conn)) {
2507 return NT_STATUS_CONNECTION_DISCONNECTED;
2508 }
2509
2510 if ((state->conn->protocol != PROTOCOL_NONE) &&
2511 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2512 return NT_STATUS_REVISION_MISMATCH;
2513 }
2514
2515 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2516 if (opcode == SMB2_OP_CANCEL) {
2517 goto skip_credits;
2518 }
2519
2520 avail = UINT64_MAX - state->conn->smb2.mid;
2521 if (avail < 1) {
2522 return NT_STATUS_CONNECTION_ABORTED;
2523 }
2524
2525 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2526 charge = (MAX(state->smb2.dyn_len, 1) - 1)/ 65536 + 1;
2527 } else {
2528 charge = 1;
2529 }
2530
2531 charge = MAX(state->smb2.credit_charge, charge);
2532
2533 avail = MIN(avail, state->conn->smb2.cur_credits);
2534 if (avail < charge) {
2535 return NT_STATUS_INTERNAL_ERROR;
2536 }
2537
2538 credits = 0;
2539 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
2540 credits = state->conn->smb2.max_credits -
2541 state->conn->smb2.cur_credits;
2542 }
2543 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
2544 credits += 1;
2545 }
2546
2547 mid = state->conn->smb2.mid;
2548 state->conn->smb2.mid += charge;
2549 state->conn->smb2.cur_credits -= charge;
2550
2551 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2552 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
2553 }
2554 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
2555 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2556
2557 skip_credits:
2558 hdr_iov = num_iov;
2559 iov[num_iov].iov_base = state->smb2.hdr;
2560 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
2561 num_iov += 1;
2562
2563 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2564 iov[num_iov].iov_len = state->smb2.fixed_len;
2565 num_iov += 1;
2566
2567 if (state->smb2.dyn != NULL) {
2568 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2569 iov[num_iov].iov_len = state->smb2.dyn_len;
2570 num_iov += 1;
2571 }
2572
2573 reqlen = sizeof(state->smb2.hdr);
2574 reqlen += state->smb2.fixed_len;
2575 reqlen += state->smb2.dyn_len;
2576
2577 if (i < num_reqs-1) {
2578 if ((reqlen % 8) > 0) {
2579 uint8_t pad = 8 - (reqlen % 8);
2580 iov[num_iov].iov_base = state->smb2.pad;
2581 iov[num_iov].iov_len = pad;
2582 num_iov += 1;
2583 reqlen += pad;
2584 }
2585 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
2586 }
2587 nbt_len += reqlen;
2588
2589 if (state->session) {
2590 bool should_sign = state->session->smb2.should_sign;
2591
2592 if (opcode == SMB2_OP_SESSSETUP &&
2593 state->session->smb2.signing_key.length != 0) {
2594 should_sign = true;
2595 }
2596
2597 /*
2598 * We prefer the channel signing key if it is
2599 * already there.
2600 */
2601 if (should_sign) {
2602 signing_key = &state->session->smb2.channel_signing_key;
2603 }
2604
2605 /*
2606 * If it is a channel binding, we already have the main
2607 * signing key and try that one.
2608 */
2609 if (signing_key && signing_key->length == 0) {
2610 signing_key = &state->session->smb2.signing_key;
2611 }
2612
2613 /*
2614 * If we do not have any session key yet, we skip the
2615 * signing of SMB2_OP_SESSSETUP requests.
2616 */
2617 if (signing_key && signing_key->length == 0) {
2618 signing_key = NULL;
2619 }
2620 }
2621
2622 if (signing_key) {
2623 NTSTATUS status;
2624
2625 status = smb2_signing_sign_pdu(*signing_key,
2626 &iov[hdr_iov], num_iov - hdr_iov);
2627 if (!NT_STATUS_IS_OK(status)) {
2628 return status;
2629 }
2630 }
2631
2632 ret = smbXcli_req_set_pending(reqs[i]);
2633 if (!ret) {
2634 return NT_STATUS_NO_MEMORY;
2635 }
2636 }
2637
2638 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
2639 _smb_setlen_tcp(state->length_hdr, nbt_len);
2640 iov[0].iov_base = state->length_hdr;
2641 iov[0].iov_len = sizeof(state->length_hdr);
2642
2643 if (state->conn->dispatch_incoming == NULL) {
2644 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
2645 }
2646
2647 subreq = writev_send(state, state->ev, state->conn->outgoing,
2648 state->conn->write_fd, false, iov, num_iov);
2649 if (subreq == NULL) {
2650 return NT_STATUS_NO_MEMORY;
2651 }
2652 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
2653 return NT_STATUS_OK;
2654 }
2655
2656 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
2657 {
2658 struct smbXcli_req_state *state =
2659 tevent_req_data(req,
2660 struct smbXcli_req_state);
2661
2662 state->smb2.credit_charge = charge;
2663 }
2664
2665 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
2666 struct tevent_context *ev,
2667 struct smbXcli_conn *conn,
2668 uint16_t cmd,
2669 uint32_t additional_flags,
2670 uint32_t clear_flags,
2671 uint32_t timeout_msec,
2672 uint32_t pid,
2673 uint32_t tid,
2674 struct smbXcli_session *session,
2675 const uint8_t *fixed,
2676 uint16_t fixed_len,
2677 const uint8_t *dyn,
2678 uint32_t dyn_len)
2679 {
2680 struct tevent_req *req;
2681 NTSTATUS status;
2682
2683 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
2684 additional_flags, clear_flags,
2685 timeout_msec,
2686 pid, tid, session,
2687 fixed, fixed_len, dyn, dyn_len);
2688 if (req == NULL) {
2689 return NULL;
2690 }
2691 if (!tevent_req_is_in_progress(req)) {
2692 return tevent_req_post(req, ev);
2693 }
2694 status = smb2cli_req_compound_submit(&req, 1);
2695 if (tevent_req_nterror(req, status)) {
2696 return tevent_req_post(req, ev);
2697 }
2698 return req;
2699 }
2700
2701 static void smb2cli_req_writev_done(struct tevent_req *subreq)
2702 {
2703 struct tevent_req *req =
2704 tevent_req_callback_data(subreq,
2705 struct tevent_req);
2706 struct smbXcli_req_state *state =
2707 tevent_req_data(req,
2708 struct smbXcli_req_state);
2709 ssize_t nwritten;
2710 int err;
2711
2712 nwritten = writev_recv(subreq, &err);
2713 TALLOC_FREE(subreq);
2714 if (nwritten == -1) {
2715 /* here, we need to notify all pending requests */
2716 NTSTATUS status = map_nt_error_from_unix_common(err);
2717 smbXcli_conn_disconnect(state->conn, status);
2718 return;
2719 }
2720 }
2721
2722 static NTSTATUS smb2cli_inbuf_parse_compound(uint8_t *buf, TALLOC_CTX *mem_ctx,
2723 struct iovec **piov, int *pnum_iov)
2724 {
2725 struct iovec *iov;
2726 int num_iov;
2727 size_t buflen;
2728 size_t taken;
2729 uint8_t *first_hdr;
2730
2731 num_iov = 0;
2732
2733 iov = talloc_array(mem_ctx, struct iovec, num_iov);
2734 if (iov == NULL) {
2735 return NT_STATUS_NO_MEMORY;
2736 }
2737
2738 buflen = smb_len_tcp(buf);
2739 taken = 0;
2740 first_hdr = buf + NBT_HDR_SIZE;
2741
2742 while (taken < buflen) {
2743 size_t len = buflen - taken;
2744 uint8_t *hdr = first_hdr + taken;
2745 struct iovec *cur;
2746 size_t full_size;
2747 size_t next_command_ofs;
2748 uint16_t body_size;
2749 struct iovec *iov_tmp;
2750
2751 /*
2752 * We need the header plus the body length field
2753 */
2754
2755 if (len < SMB2_HDR_BODY + 2) {
2756 DEBUG(10, ("%d bytes left, expected at least %d\n",
2757 (int)len, SMB2_HDR_BODY));
2758 goto inval;
2759 }
2760 if (IVAL(hdr, 0) != SMB2_MAGIC) {
2761 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
2762 IVAL(hdr, 0)));
2763 goto inval;
2764 }
2765 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
2766 DEBUG(10, ("Got HDR len %d, expected %d\n",
2767 SVAL(hdr, 4), SMB2_HDR_BODY));
2768 goto inval;
2769 }
2770
2771 full_size = len;
2772 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
2773 body_size = SVAL(hdr, SMB2_HDR_BODY);
2774
2775 if (next_command_ofs != 0) {
2776 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
2777 goto inval;
2778 }
2779 if (next_command_ofs > full_size) {
2780 goto inval;
2781 }
2782 full_size = next_command_ofs;
2783 }
2784 if (body_size < 2) {
2785 goto inval;
2786 }
2787 body_size &= 0xfffe;
2788
2789 if (body_size > (full_size - SMB2_HDR_BODY)) {
2790 goto inval;
2791 }
2792
2793 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
2794 num_iov + 3);
2795 if (iov_tmp == NULL) {
2796 TALLOC_FREE(iov);
2797 return NT_STATUS_NO_MEMORY;
2798 }
2799 iov = iov_tmp;
2800 cur = &iov[num_iov];
2801 num_iov += 3;
2802
2803 cur[0].iov_base = hdr;
2804 cur[0].iov_len = SMB2_HDR_BODY;
2805 cur[1].iov_base = hdr + SMB2_HDR_BODY;
2806 cur[1].iov_len = body_size;
2807 cur[2].iov_base = hdr + SMB2_HDR_BODY + body_size;
2808 cur[2].iov_len = full_size - (SMB2_HDR_BODY + body_size);
2809
2810 taken += full_size;
2811 }
2812
2813 *piov = iov;
2814 *pnum_iov = num_iov;
2815 return NT_STATUS_OK;
2816
2817 inval:
2818 TALLOC_FREE(iov);
2819 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2820 }
2821
2822 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
2823 uint64_t mid)
2824 {
2825 size_t num_pending = talloc_array_length(conn->pending);
2826 size_t i;
2827
2828 for (i=0; i<num_pending; i++) {
2829 struct tevent_req *req = conn->pending[i];
2830 struct smbXcli_req_state *state =
2831 tevent_req_data(req,
2832 struct smbXcli_req_state);
2833
2834 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
2835 return req;
2836 }
2837 }
2838 return NULL;
2839 }
2840
2841 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2842 TALLOC_CTX *tmp_mem,
2843 uint8_t *inbuf)
2844 {
2845 struct tevent_req *req;
2846 struct smbXcli_req_state *state = NULL;
2847 struct iovec *iov;
2848 int i, num_iov;
2849 NTSTATUS status;
2850 bool defer = true;
2851 struct smbXcli_session *last_session = NULL;
2852
2853 status = smb2cli_inbuf_parse_compound(inbuf, tmp_mem,
2854 &iov, &num_iov);
2855 if (!NT_STATUS_IS_OK(status)) {
2856 return status;
2857 }
2858
2859 for (i=0; i<num_iov; i+=3) {
2860 uint8_t *inbuf_ref = NULL;
2861 struct iovec *cur = &iov[i];
2862 uint8_t *inhdr = (uint8_t *)cur[0].iov_base;
2863 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
2864 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
2865 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
2866 uint16_t req_opcode;
2867 uint32_t req_flags;
2868 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
2869 uint32_t new_credits;
2870 struct smbXcli_session *session = NULL;
2871 const DATA_BLOB *signing_key = NULL;
2872 bool should_sign = false;
2873
2874 new_credits = conn->smb2.cur_credits;
2875 new_credits += credits;
2876 if (new_credits > UINT16_MAX) {
2877 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2878 }
2879 conn->smb2.cur_credits += credits;
2880
2881 req = smb2cli_conn_find_pending(conn, mid);
2882 if (req == NULL) {
2883 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2884 }
2885 state = tevent_req_data(req, struct smbXcli_req_state);
2886
2887 state->smb2.got_async = false;
2888
2889 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2890 if (opcode != req_opcode) {
2891 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2892 }
2893 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2894
2895 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
2896 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2897 }
2898
2899 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
2900 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
2901 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
2902 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
2903
2904 /*
2905 * async interim responses are not signed,
2906 * even if the SMB2_HDR_FLAG_SIGNED flag
2907 * is set.
2908 */
2909 req_flags |= SMB2_HDR_FLAG_ASYNC;
2910 SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
2911 SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
2912
2913 if (state->smb2.notify_async) {
2914 state->smb2.got_async = true;
2915 tevent_req_defer_callback(req, state->ev);
2916 tevent_req_notify_callback(req);
2917 }
2918 continue;
2919 }
2920
2921 session = state->session;
2922 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
2923 session = last_session;
2924 }
2925 last_session = session;
2926
2927 if (session) {
2928 should_sign = session->smb2.should_sign;
2929 if (opcode == SMB2_OP_SESSSETUP &&
2930 session->smb2.signing_key.length != 0) {
2931 should_sign = true;
2932 }
2933 }
2934
2935 if (should_sign) {
2936 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
2937 return NT_STATUS_ACCESS_DENIED;
2938 }
2939 }
2940
2941 if (flags & SMB2_HDR_FLAG_SIGNED) {
2942 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
2943
2944 if (session == NULL) {
2945 struct smbXcli_session *s;
2946
2947 s = state->conn->sessions;
2948 for (; s; s = s->next) {
2949 if (s->smb2.session_id != uid) {
2950 continue;
2951 }
2952
2953 session = s;
2954 break;
2955 }
2956 }
2957
2958 if (session == NULL) {
2959 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2960 }
2961
2962 last_session = session;
2963 signing_key = &session->smb2.channel_signing_key;
2964 }
2965
2966 if (opcode == SMB2_OP_SESSSETUP) {
2967 /*
2968 * We prefer the channel signing key, if it is
2969 * already there.
2970 *
2971 * If we do not have a channel signing key yet,
2972 * we try the main signing key, if it is not
2973 * the final response.
2974 */
2975 if (signing_key && signing_key->length == 0 &&
2976 !NT_STATUS_IS_OK(status)) {
2977 signing_key = &session->smb2.signing_key;
2978 }
2979
2980 if (signing_key && signing_key->length == 0) {
2981 /*
2982 * If we do not have a session key to
2983 * verify the signature, we defer the
2984 * signing check to the caller.
2985 *
2986 * The caller gets NT_STATUS_OK, it
2987 * has to call
2988 * smb2cli_session_set_session_key()
2989 * or
2990 * smb2cli_session_set_channel_key()
2991 * which will check the signature
2992 * with the channel signing key.
2993 */
2994 signing_key = NULL;
2995 }
2996 }
2997
2998 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
2999 /*
3000 * if the server returns NT_STATUS_USER_SESSION_DELETED
3001 * the response is not signed and we should
3002 * propagate the NT_STATUS_USER_SESSION_DELETED
3003 * status to the caller.
3004 */
3005 if (signing_key) {
3006 signing_key = NULL;
3007 }
3008 }
3009
3010 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3011 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3012 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3013 /*
3014 * if the server returns
3015 * NT_STATUS_NETWORK_NAME_DELETED
3016 * NT_STATUS_FILE_CLOSED
3017 * NT_STATUS_INVALID_PARAMETER
3018 * the response might not be signed
3019 * as this happens before the signing checks.
3020 *
3021 * If server echos the signature (or all zeros)
3022 * we should report the status from the server
3023 * to the caller.
3024 */
3025 if (signing_key) {
3026 int cmp;
3027
3028 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3029 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3030 16);
3031 if (cmp == 0) {
3032 state->smb2.signing_skipped = true;
3033 signing_key = NULL;
3034 }
3035 }
3036 if (signing_key) {
3037 int cmp;
3038 static const uint8_t zeros[16];
3039
3040 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3041 zeros,
3042 16);
3043 if (cmp == 0) {
3044 state->smb2.signing_skipped = true;
3045 signing_key = NULL;
3046 }
3047 }
3048 }
3049
3050 if (signing_key) {
3051 status = smb2_signing_check_pdu(*signing_key, cur, 3);
3052 if (!NT_STATUS_IS_OK(status)) {
3053 /*
3054 * If the signing check fails, we disconnect
3055 * the connection.
3056 */
3057 return status;
3058 }
3059 }
3060
3061 smbXcli_req_unset_pending(req);
3062
3063 /*
3064 * There might be more than one response
3065 * we need to defer the notifications
3066 */
3067 if ((num_iov == 4) && (talloc_array_length(conn->pending) == 0)) {
3068 defer = false;
3069 }
3070
3071 if (defer) {
3072 tevent_req_defer_callback(req, state->ev);
3073 }
3074
3075 /*
3076 * Note: here we use talloc_reference() in a way
3077 * that does not expose it to the caller.
3078 */
3079 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3080 if (tevent_req_nomem(inbuf_ref, req)) {
3081 continue;
3082 }
3083
3084 /* copy the related buffers */
3085 state->smb2.recv_iov[0] = cur[0];
3086 state->smb2.recv_iov[1] = cur[1];
3087 state->smb2.recv_iov[2] = cur[2];
3088
3089 tevent_req_done(req);
3090 }
3091
3092 if (defer) {
3093 return NT_STATUS_RETRY;
3094 }
3095
3096 return NT_STATUS_OK;
3097 }
3098
3099 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3100 struct iovec **piov,
3101 const struct smb2cli_req_expected_response *expected,
3102 size_t num_expected)
3103 {
3104 struct smbXcli_req_state *state =
3105 tevent_req_data(req,
3106 struct smbXcli_req_state);
3107 NTSTATUS status;
3108 size_t body_size;
3109 bool found_status = false;
3110 bool found_size = false;
3111 size_t i;
3112
3113 if (piov != NULL) {
3114 *piov = NULL;
3115 }
3116
3117 if (state->smb2.got_async) {
3118 return STATUS_PENDING;
3119 }
3120
3121 if (tevent_req_is_nterror(req, &status)) {
3122 for (i=0; i < num_expected; i++) {
3123 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3124 found_status = true;
3125 break;
3126 }
3127 }
3128
3129 if (found_status) {
3130 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3131 }
3132
3133 return status;
3134 }
3135
3136 if (num_expected == 0) {
3137 found_status = true;
3138 found_size = true;
3139 }
3140
3141 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3142 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3143
3144 for (i=0; i < num_expected; i++) {
3145 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3146 continue;
3147 }
3148
3149 found_status = true;
3150 if (expected[i].body_size == 0) {
3151 found_size = true;
3152 break;
3153 }
3154
3155 if (expected[i].body_size == body_size) {
3156 found_size = true;
3157 break;
3158 }
3159 }
3160
3161 if (!found_status) {
3162 return status;
3163 }
3164
3165 if (state->smb2.signing_skipped) {
3166 if (num_expected > 0) {
3167 return NT_STATUS_ACCESS_DENIED;
3168 }
3169 if (!NT_STATUS_IS_ERR(status)) {
3170 return NT_STATUS_ACCESS_DENIED;
3171 }
3172 }
3173
3174 if (!found_size) {
3175 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3176 }
3177
3178 if (piov != NULL) {
3179 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3180 }
3181
3182 return status;
3183 }
3184
3185 static const struct {
3186 enum protocol_types proto;
3187 const char *smb1_name;
3188 } smb1cli_prots[] = {
3189 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
3190 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
3191 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
3192 {PROTOCOL_LANMAN1, "LANMAN1.0"},
3193 {PROTOCOL_LANMAN2, "LM1.2X002"},
3194 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
3195 {PROTOCOL_LANMAN2, "LANMAN2.1"},
3196 {PROTOCOL_LANMAN2, "Samba"},
3197 {PROTOCOL_NT1, "NT LANMAN 1.0"},
3198 {PROTOCOL_NT1, "NT LM 0.12"},
3199 {PROTOCOL_SMB2_02, "SMB 2.002"},
3200 {PROTOCOL_SMB2_10, "SMB 2.???"},
3201 };
3202
3203 static const struct {
3204 enum protocol_types proto;
3205 uint16_t smb2_dialect;
3206 } smb2cli_prots[] = {
3207 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
3208 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
3209 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
3210 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
3211 };
3212
3213 struct smbXcli_negprot_state {
3214 struct smbXcli_conn *conn;
3215 struct tevent_context *ev;
3216 uint32_t timeout_msec;
3217 enum protocol_types min_protocol;
3218 enum protocol_types max_protocol;
3219
3220 struct {
3221 uint8_t fixed[36];
3222 uint8_t dyn[ARRAY_SIZE(smb2cli_prots)*2];
3223 } smb2;
3224 };
3225
3226 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3227 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3228 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3229 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3230 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3231 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3232 TALLOC_CTX *frame,
3233 uint8_t *inbuf);
3234
3235 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3236 struct tevent_context *ev,
3237 struct smbXcli_conn *conn,
3238 uint32_t timeout_msec,
3239 enum protocol_types min_protocol,
3240 enum protocol_types max_protocol)
3241 {
3242 struct tevent_req *req, *subreq;
3243 struct smbXcli_negprot_state *state;
3244
3245 req = tevent_req_create(mem_ctx, &state,
3246 struct smbXcli_negprot_state);
3247 if (req == NULL) {
3248 return NULL;
3249 }
3250 state->conn = conn;
3251 state->ev = ev;
3252 state->timeout_msec = timeout_msec;
3253 state->min_protocol = min_protocol;
3254 state->max_protocol = max_protocol;
3255
3256 if (min_protocol == PROTOCOL_NONE) {
3257 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3258 return tevent_req_post(req, ev);
3259 }
3260
3261 if (max_protocol == PROTOCOL_NONE) {
3262 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3263 return tevent_req_post(req, ev);
3264 }
3265
3266 if (min_protocol > max_protocol) {
3267 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3268 return tevent_req_post(req, ev);
3269 }
3270
3271 if ((min_protocol < PROTOCOL_SMB2_02) &&
3272 (max_protocol < PROTOCOL_SMB2_02)) {
3273 /*
3274 * SMB1 only...
3275 */
3276 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3277
3278 subreq = smbXcli_negprot_smb1_subreq(state);
3279 if (tevent_req_nomem(subreq, req)) {
3280 return tevent_req_post(req, ev);
3281 }
3282 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3283 return req;
3284 }
3285
3286 if ((min_protocol >= PROTOCOL_SMB2_02) &&
3287 (max_protocol >= PROTOCOL_SMB2_02)) {
3288 /*
3289 * SMB2 only...
3290 */
3291 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3292
3293 subreq = smbXcli_negprot_smb2_subreq(state);
3294 if (tevent_req_nomem(subreq, req)) {
3295 return tevent_req_post(req, ev);
3296 }
3297 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3298 return req;
3299 }
3300
3301 /*
3302 * We send an SMB1 negprot with the SMB2 dialects
3303 * and expect a SMB1 or a SMB2 response.
3304 *
3305 * smbXcli_negprot_dispatch_incoming() will fix the
3306 * callback to match protocol of the response.
3307 */
3308 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
3309
3310 subreq = smbXcli_negprot_smb1_subreq(state);
3311 if (tevent_req_nomem(subreq, req)) {
3312 return tevent_req_post(req, ev);
3313 }
3314 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
3315 return req;
3316 }
3317
3318 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
3319 {
3320 struct tevent_req *req =
3321 tevent_req_callback_data(subreq,
3322 struct tevent_req);
3323 NTSTATUS status;
3324
3325 /*
3326 * we just want the low level error
3327 */
3328 status = tevent_req_simple_recv_ntstatus(subreq);
3329 TALLOC_FREE(subreq);
3330 if (tevent_req_nterror(req, status)) {
3331 return;
3332 }
3333
3334 /* this should never happen */
3335 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
3336 }
3337
3338 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
3339 {
3340 size_t i;
3341 DATA_BLOB bytes = data_blob_null;
3342 uint8_t flags;
3343 uint16_t flags2;
3344
3345 /* setup the protocol strings */
3346 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3347 uint8_t c = 2;
3348 bool ok;
3349
3350 if (smb1cli_prots[i].proto < state->min_protocol) {
3351 continue;
3352 }
3353
3354 if (smb1cli_prots[i].proto > state->max_protocol) {
3355 continue;
3356 }
3357
3358 ok = data_blob_append(state, &bytes, &c, sizeof(c));
3359 if (!ok) {
3360 return NULL;
3361 }
3362
3363 /*
3364 * We now it is already ascii and
3365 * we want NULL termination.
3366 */
3367 ok = data_blob_append(state, &bytes,
3368 smb1cli_prots[i].smb1_name,
3369 strlen(smb1cli_prots[i].smb1_name)+1);
3370 if (!ok) {
3371 return NULL;
3372 }
3373 }
3374
3375 smb1cli_req_flags(state->max_protocol,
3376 state->conn->smb1.client.capabilities,
3377 SMBnegprot,
3378 0, 0, &flags,
3379 0, 0, &flags2);
3380
3381 return smb1cli_req_send(state, state->ev, state->conn,
3382 SMBnegprot,
3383 flags, ~flags,
3384 flags2, ~flags2,
3385 state->timeout_msec,
3386 0xFFFE, 0, 0, /* pid, tid, uid */
3387 0, NULL, /* wct, vwv */
3388 bytes.length, bytes.data);
3389 }
3390
3391 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
3392 {
3393 struct tevent_req *req =
3394 tevent_req_callback_data(subreq,
3395 struct tevent_req);
3396 struct smbXcli_negprot_state *state =
3397 tevent_req_data(req,
3398 struct smbXcli_negprot_state);
3399 struct smbXcli_conn *conn = state->conn;
3400 struct iovec *recv_iov = NULL;
3401 uint8_t *inhdr;
3402 uint8_t wct;
3403 uint16_t *vwv;
3404 uint32_t num_bytes;
3405 uint8_t *bytes;
3406 NTSTATUS status;
3407 uint16_t protnum;
3408 size_t i;
3409 size_t num_prots = 0;
3410 uint8_t flags;
3411 uint32_t client_capabilities = conn->smb1.client.capabilities;
3412 uint32_t both_capabilities;
3413 uint32_t server_capabilities = 0;
3414 uint32_t capabilities;
3415 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
3416 uint32_t server_max_xmit = 0;
3417 uint32_t max_xmit;
3418 uint32_t server_max_mux = 0;
3419 uint16_t server_security_mode = 0;
3420 uint32_t server_session_key = 0;
3421 bool server_readbraw = false;
3422 bool server_writebraw = false;
3423 bool server_lockread = false;
3424 bool server_writeunlock = false;
3425 struct GUID server_guid = GUID_zero();
3426 DATA_BLOB server_gss_blob = data_blob_null;
3427 uint8_t server_challenge[8];
3428 char *server_workgroup = NULL;
3429 char *server_name = NULL;
3430 int server_time_zone = 0;
3431 NTTIME server_system_time = 0;
3432 static const struct smb1cli_req_expected_response expected[] = {
3433 {
3434 .status = NT_STATUS_OK,
3435 .wct = 0x11, /* NT1 */
3436 },
3437 {
3438 .status = NT_STATUS_OK,
3439 .wct = 0x0D, /* LM */
3440 },
3441 {
3442 .status = NT_STATUS_OK,
3443 .wct = 0x01, /* CORE */
3444 }
3445 };
3446
3447 ZERO_STRUCT(server_challenge);
3448
3449 status = smb1cli_req_recv(subreq, state,
3450 &recv_iov,
3451 &inhdr,
3452 &wct,
3453 &vwv,
3454 NULL, /* pvwv_offset */
3455 &num_bytes,
3456 &bytes,
3457 NULL, /* pbytes_offset */
3458 NULL, /* pinbuf */
3459 expected, ARRAY_SIZE(expected));
3460 TALLOC_FREE(subreq);
3461 if (tevent_req_nterror(req, status)) {
3462 return;
3463 }
3464
3465 flags = CVAL(inhdr, HDR_FLG);
3466
3467 protnum = SVAL(vwv, 0);
3468
3469 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3470 if (smb1cli_prots[i].proto < state->min_protocol) {
3471 continue;
3472 }
3473
3474 if (smb1cli_prots[i].proto > state->max_protocol) {
3475 continue;
3476 }
3477
3478 if (protnum != num_prots) {
3479 num_prots++;
3480 continue;
3481 }
3482
3483 conn->protocol = smb1cli_prots[i].proto;
3484 break;
3485 }
3486
3487 if (conn->protocol == PROTOCOL_NONE) {
3488 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3489 return;
3490 }
3491
3492 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
3493 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
3494 "and the selected protocol level doesn't support it.\n"));
3495 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3496 return;
3497 }
3498
3499 if (flags & FLAG_SUPPORT_LOCKREAD) {
3500 server_lockread = true;
3501 server_writeunlock = true;
3502 }
3503
3504 if (conn->protocol >= PROTOCOL_NT1) {
3505 const char *client_signing = NULL;
3506 bool server_mandatory = false;
3507 bool server_allowed = false;
3508 const char *server_signing = NULL;
3509 bool ok;
3510 uint8_t key_len;
3511
3512 if (wct != 0x11) {
3513 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3514 return;
3515 }
3516
3517 /* NT protocol */
3518 server_security_mode = CVAL(vwv + 1, 0);
3519 server_max_mux = SVAL(vwv + 1, 1);
3520 server_max_xmit = IVAL(vwv + 3, 1);
3521 server_session_key = IVAL(vwv + 7, 1);
3522 server_time_zone = SVALS(vwv + 15, 1);
3523 server_time_zone *= 60;
3524 /* this time arrives in real GMT */
3525 server_system_time = BVAL(vwv + 11, 1);
3526 server_capabilities = IVAL(vwv + 9, 1);
3527
3528 key_len = CVAL(vwv + 16, 1);
3529
3530 if (server_capabilities & CAP_RAW_MODE) {
3531 server_readbraw = true;
3532 server_writebraw = true;
3533 }
3534 if (server_capabilities & CAP_LOCK_AND_READ) {
3535 server_lockread = true;
3536 }
3537
3538 if (server_capabilities & CAP_EXTENDED_SECURITY) {
3539 DATA_BLOB blob1, blob2;
3540
3541 if (num_bytes < 16) {
3542 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3543 return;
3544 }
3545
3546 blob1 = data_blob_const(bytes, 16);
3547 status = GUID_from_data_blob(&blob1, &server_guid);
3548 if (tevent_req_nterror(req, status)) {
3549 return;
3550 }
3551
3552 blob1 = data_blob_const(bytes+16, num_bytes-16);
3553 blob2 = data_blob_dup_talloc(state, blob1);
3554 if (blob1.length > 0 &&
3555 tevent_req_nomem(blob2.data, req)) {
3556 return;
3557 }
3558 server_gss_blob = blob2;
3559 } else {
3560 DATA_BLOB blob1, blob2;
3561
3562 if (num_bytes < key_len) {
3563 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3564 return;
3565 }
3566
3567 if (key_len != 0 && key_len != 8) {
3568 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3569 return;
3570 }
3571
3572 if (key_len == 8) {
3573 memcpy(server_challenge, bytes, 8);
3574 }
3575
3576 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
3577 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
3578 if (blob1.length > 0) {
3579 size_t len;
3580
3581 len = utf16_len_n(blob1.data,
3582 blob1.length);
3583 blob1.length = len;
3584
3585 ok = convert_string_talloc(state,
3586 CH_UTF16LE,
3587 CH_UNIX,
3588 blob1.data,
3589 blob1.length,
3590 &server_workgroup,
3591 &len);
3592 if (!ok) {
3593 status = map_nt_error_from_unix_common(errno);
3594 tevent_req_nterror(req, status);
3595 return;
3596 }
3597 }
3598
3599 blob2.data += blob1.length;
3600 blob2.length -= blob1.length;
3601 if (blob2.length > 0) {
3602 size_t len;
3603
3604 len = utf16_len_n(blob1.data,
3605 blob1.length);
3606 blob1.length = len;
3607
3608 ok = convert_string_talloc(state,
3609 CH_UTF16LE,
3610 CH_UNIX,
3611 blob2.data,
3612 blob2.length,
3613 &server_name,
3614 &len);
3615 if (!ok) {
3616 status = map_nt_error_from_unix_common(errno);
3617 tevent_req_nterror(req, status);
3618 return;
3619 }
3620 }
3621 }
3622
3623 client_signing = "disabled";
3624 if (conn->allow_signing) {
3625 client_signing = "allowed";
3626 }
3627 if (conn->mandatory_signing) {
3628 client_signing = "required";
3629 }
3630
3631 server_signing = "not supported";
3632 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
3633 server_signing = "supported";
3634 server_allowed = true;
3635 }
3636 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
3637 server_signing = "required";
3638 server_mandatory = true;
3639 }
3640
3641 ok = smb_signing_set_negotiated(conn->smb1.signing,
3642 server_allowed,
3643 server_mandatory);
3644 if (!ok) {
3645 DEBUG(1,("cli_negprot: SMB signing is required, "
3646 "but client[%s] and server[%s] mismatch\n",
3647 client_signing, server_signing));
3648 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3649 return;
3650 }
3651
3652 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
3653 DATA_BLOB blob1;
3654 uint8_t key_len;
3655 time_t t;
3656
3657 if (wct != 0x0D) {
3658 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3659 return;
3660 }
3661
3662 server_security_mode = SVAL(vwv + 1, 0);
3663 server_max_xmit = SVAL(vwv + 2, 0);
3664 server_max_mux = SVAL(vwv + 3, 0);
3665 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
3666 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
3667 server_session_key = IVAL(vwv + 6, 0);
3668 server_time_zone = SVALS(vwv + 10, 0);
3669 server_time_zone *= 60;
3670 /* this time is converted to GMT by make_unix_date */
3671 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
3672 unix_to_nt_time(&server_system_time, t);
3673 key_len = SVAL(vwv + 11, 0);
3674
3675 if (num_bytes < key_len) {
3676 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3677 return;
3678 }
3679
3680 if (key_len != 0 && key_len != 8) {
3681 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3682 return;
3683 }
3684
3685 if (key_len == 8) {
3686 memcpy(server_challenge, bytes, 8);
3687 }
3688
3689 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
3690 if (blob1.length > 0) {
3691 size_t len;
3692 bool ok;
3693
3694 len = utf16_len_n(blob1.data,
3695 blob1.length);
3696 blob1.length = len;
3697
3698 ok = convert_string_talloc(state,
3699 CH_DOS,
3700 CH_UNIX,
3701 blob1.data,
3702 blob1.length,
3703 &server_workgroup,
3704 &len);
3705 if (!ok) {
3706 status = map_nt_error_from_unix_common(errno);
3707 tevent_req_nterror(req, status);
3708 return;
3709 }
3710 }
3711
3712 } else {
3713 /* the old core protocol */
3714 server_time_zone = get_time_zone(time(NULL));
3715 server_max_xmit = 1024;
3716 server_max_mux = 1;
3717 }
3718
3719 if (server_max_xmit < 1024) {
3720 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3721 return;
3722 }
3723
3724 if (server_max_mux < 1) {
3725 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3726 return;
3727 }
3728
3729 /*
3730 * Now calculate the negotiated capabilities
3731 * based on the mask for:
3732 * - client only flags
3733 * - flags used in both directions
3734 * - server only flags
3735 */
3736 both_capabilities = client_capabilities & server_capabilities;
3737 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
3738 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
3739 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
3740
3741 max_xmit = MIN(client_max_xmit, server_max_xmit);
3742
3743 conn->smb1.server.capabilities = server_capabilities;
3744 conn->smb1.capabilities = capabilities;
3745
3746 conn->smb1.server.max_xmit = server_max_xmit;
3747 conn->smb1.max_xmit = max_xmit;
3748
3749 conn->smb1.server.max_mux = server_max_mux;
3750
3751 conn->smb1.server.security_mode = server_security_mode;
3752
3753 conn->smb1.server.readbraw = server_readbraw;
3754 conn->smb1.server.writebraw = server_writebraw;
3755 conn->smb1.server.lockread = server_lockread;
3756 conn->smb1.server.writeunlock = server_writeunlock;
3757
3758 conn->smb1.server.session_key = server_session_key;
3759
3760 talloc_steal(conn, server_gss_blob.data);
3761 conn->smb1.server.gss_blob = server_gss_blob;
3762 conn->smb1.server.guid = server_guid;
3763 memcpy(conn->smb1.server.challenge, server_challenge, 8);
3764 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
3765 conn->smb1.server.name = talloc_move(conn, &server_name);
3766
3767 conn->smb1.server.time_zone = server_time_zone;
3768 conn->smb1.server.system_time = server_system_time;
3769
3770 tevent_req_done(req);
3771 }
3772
3773 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
3774 {
3775 size_t i;
3776 uint8_t *buf;
3777 uint16_t dialect_count = 0;
3778
3779 buf = state->smb2.dyn;
3780 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
3781 if (smb2cli_prots[i].proto < state->min_protocol) {
3782 continue;
3783 }
3784
3785 if (smb2cli_prots[i].proto > state->max_protocol) {
3786 continue;
3787 }
3788
3789 SSVAL(buf, dialect_count*2, smb2cli_prots[i].smb2_dialect);
3790 dialect_count++;
3791 }
3792
3793 buf = state->smb2.fixed;
3794 SSVAL(buf, 0, 36);
3795 SSVAL(buf, 2, dialect_count);
3796 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
3797 SSVAL(buf, 6, 0); /* Reserved */
3798 SSVAL(buf, 8, 0); /* Capabilities */
3799 if (state->max_protocol >= PROTOCOL_SMB2_10) {
3800 NTSTATUS status;
3801 DATA_BLOB blob;
3802
3803 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
3804 state, &blob);
3805 if (!NT_STATUS_IS_OK(status)) {
3806 return NULL;
3807 }
3808 memcpy(buf+12, blob.data, 16); /* ClientGuid */
3809 } else {
3810 memset(buf+12, 0, 16); /* ClientGuid */
3811 }
3812 SBVAL(buf, 28, 0); /* ClientStartTime */
3813
3814 return smb2cli_req_send(state, state->ev,
3815 state->conn, SMB2_OP_NEGPROT,
3816 0, 0, /* flags */
3817 state->timeout_msec,
3818 0xFEFF, 0, NULL, /* pid, tid, session */
3819 state->smb2.fixed, sizeof(state->smb2.fixed),
3820 state->smb2.dyn, dialect_count*2);
3821 }
3822
3823 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
3824 {
3825 struct tevent_req *req =
3826 tevent_req_callback_data(subreq,
3827 struct tevent_req);
3828 struct smbXcli_negprot_state *state =
3829 tevent_req_data(req,
3830 struct smbXcli_negprot_state);
3831 struct smbXcli_conn *conn = state->conn;
3832 size_t security_offset, security_length;
3833 DATA_BLOB blob;
3834 NTSTATUS status;
3835 struct iovec *iov;
3836 uint8_t *body;
3837 size_t i;
3838 uint16_t dialect_revision;
3839 static const struct smb2cli_req_expected_response expected[] = {
3840 {
3841 .status = NT_STATUS_OK,
3842 .body_size = 0x41
3843 }
3844 };
3845
3846 status = smb2cli_req_recv(subreq, state, &iov,
3847 expected, ARRAY_SIZE(expected));
3848 TALLOC_FREE(subreq);
3849 if (tevent_req_nterror(req, status)) {
3850 return;
3851 }
3852
3853 body = (uint8_t *)iov[1].iov_base;
3854
3855 dialect_revision = SVAL(body, 4);
3856
3857 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
3858 if (smb2cli_prots[i].proto < state->min_protocol) {
3859 continue;
3860 }
3861
3862 if (smb2cli_prots[i].proto > state->max_protocol) {
3863 continue;
3864 }
3865
3866 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
3867 continue;
3868 }
3869
3870 conn->protocol = smb2cli_prots[i].proto;
3871 break;
3872 }
3873
3874 if (conn->protocol == PROTOCOL_NONE) {
3875 if (state->min_protocol >= PROTOCOL_SMB2_02) {
3876 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3877 return;
3878 }
3879
3880 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
3881 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3882 return;
3883 }
3884
3885 /* make sure we do not loop forever */
3886 state->min_protocol = PROTOCOL_SMB2_02;
3887
3888 /*
3889 * send a SMB2 negprot, in order to negotiate
3890 * the SMB2 dialect.
3891 */
3892 subreq = smbXcli_negprot_smb2_subreq(state);
3893 if (tevent_req_nomem(subreq, req)) {
3894 return;
3895 }
3896 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3897 return;
3898 }
3899
3900 conn->smb2.server.security_mode = SVAL(body, 2);
3901
3902 blob = data_blob_const(body + 8, 16);
3903 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
3904 if (tevent_req_nterror(req, status)) {
3905 return;
3906 }
3907
3908 conn->smb2.server.capabilities = IVAL(body, 24);
3909 conn->smb2.server.max_trans_size= IVAL(body, 28);
3910 conn->smb2.server.max_read_size = IVAL(body, 32);
3911 conn->smb2.server.max_write_size= IVAL(body, 36);
3912 conn->smb2.server.system_time = BVAL(body, 40);
3913 conn->smb2.server.start_time = BVAL(body, 48);
3914
3915 security_offset = SVAL(body, 56);
3916 security_length = SVAL(body, 58);
3917
3918 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
3919 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3920 return;
3921 }
3922
3923 if (security_length > iov[2].iov_len) {
3924 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3925 return;
3926 }
3927
3928 conn->smb2.server.gss_blob = data_blob_talloc(conn,
3929 iov[2].iov_base,
3930 security_length);
3931 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
3932 return;
3933 }
3934
3935 tevent_req_done(req);
3936 }
3937
3938 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3939 TALLOC_CTX *tmp_mem,
3940 uint8_t *inbuf)
3941 {
3942 size_t num_pending = talloc_array_length(conn->pending);
3943 struct tevent_req *subreq;
3944 struct smbXcli_req_state *substate;
3945 struct tevent_req *req;
3946 uint32_t protocol_magic = IVAL(inbuf, 4);
3947
3948 if (num_pending != 1) {
3949 return NT_STATUS_INTERNAL_ERROR;
3950 }
3951
3952 subreq = conn->pending[0];
3953 substate = tevent_req_data(subreq, struct smbXcli_req_state);
3954 req = tevent_req_callback_data(subreq, struct tevent_req);
3955
3956 switch (protocol_magic) {
3957 case SMB_MAGIC:
3958 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3959 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3960 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
3961
3962 case SMB2_MAGIC:
3963 if (substate->smb2.recv_iov == NULL) {
3964 /*
3965 * For the SMB1 negprot we have move it.
3966 */
3967 substate->smb2.recv_iov = substate->smb1.recv_iov;
3968 substate->smb1.recv_iov = NULL;
3969 }
3970
3971 /*
3972 * we got an SMB2 answer, which consumed sequence number 0
3973 * so we need to use 1 as the next one
3974 */
3975 conn->smb2.mid = 1;
3976 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3977 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3978 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
3979 }
3980
3981 DEBUG(10, ("Got non-SMB PDU\n"));
3982 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3983 }
3984
3985 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
3986 {
3987 return tevent_req_simple_recv_ntstatus(req);
3988 }
3989
3990 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
3991 uint32_t timeout_msec,
3992 enum protocol_types min_protocol,
3993 enum protocol_types max_protocol)
3994 {
3995 TALLOC_CTX *frame = talloc_stackframe();
3996 struct tevent_context *ev;
3997 struct tevent_req *req;
3998 NTSTATUS status = NT_STATUS_NO_MEMORY;
3999 bool ok;
4000
4001 if (smbXcli_conn_has_async_calls(conn)) {
4002 /*
4003 * Can't use sync call while an async call is in flight
4004 */
4005 status = NT_STATUS_INVALID_PARAMETER_MIX;
4006 goto fail;
4007 }
4008 ev = tevent_context_init(frame);
4009 if (ev == NULL) {
4010 goto fail;
4011 }
4012 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
4013 min_protocol, max_protocol);
4014 if (req == NULL) {
4015 goto fail;
4016 }
4017 ok = tevent_req_poll(req, ev);
4018 if (!ok) {
4019 status = map_nt_error_from_unix_common(errno);
4020 goto fail;
4021 }
4022 status = smbXcli_negprot_recv(req);
4023 fail:
4024 TALLOC_FREE(frame);
4025 return status;
4026 }
4027
4028 static int smbXcli_session_destructor(struct smbXcli_session *session)
4029 {
4030 if (session->conn == NULL) {
4031 return 0;
4032 }
4033
4034 DLIST_REMOVE(session->conn->sessions, session);
4035 return 0;
4036 }
4037
4038 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
4039 struct smbXcli_conn *conn)
4040 {
4041 struct smbXcli_session *session;
4042
4043 session = talloc_zero(mem_ctx, struct smbXcli_session);
4044 if (session == NULL) {
4045 return NULL;
4046 }
4047 talloc_set_destructor(session, smbXcli_session_destructor);
4048
4049 DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
4050 session->conn = conn;
4051
4052 return session;
4053 }
4054
4055 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
4056 {
4057 struct smbXcli_conn *conn = session->conn;
4058 uint8_t security_mode = 0;
4059
4060 if (conn == NULL) {
4061 return security_mode;
4062 }
4063
4064 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
4065 if (conn->mandatory_signing) {
4066 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
4067 }
4068
4069 return security_mode;
4070 }
4071
4072 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
4073 {
4074 return session->smb2.session_id;
4075 }
4076
4077 NTSTATUS smb2cli_session_application_key(struct smbXcli_session *session,
4078 TALLOC_CTX *mem_ctx,
4079 DATA_BLOB *key)
4080 {
4081 *key = data_blob_null;
4082
4083 if (session->smb2.application_key.length == 0) {
4084 return NT_STATUS_NO_USER_SESSION_KEY;
4085 }
4086
4087 *key = data_blob_dup_talloc(mem_ctx, session->smb2.application_key);
4088 if (key->data == NULL) {
4089 return NT_STATUS_NO_MEMORY;
4090 }
4091
4092 return NT_STATUS_OK;
4093 }
4094
4095 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
4096 uint64_t session_id,
4097 uint16_t session_flags)
4098 {
4099 session->smb2.session_id = session_id;
4100 session->smb2.session_flags = session_flags;
4101 }
4102
4103 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
4104 const DATA_BLOB _session_key,
4105 const struct iovec *recv_iov)
4106 {
4107 struct smbXcli_conn *conn = session->conn;
4108 uint16_t no_sign_flags;
4109 uint8_t session_key[16];
4110 NTSTATUS status;
4111
4112 if (conn == NULL) {
4113 return NT_STATUS_INVALID_PARAMETER_MIX;
4114 }
4115
4116 if (session->smb2.signing_key.length != 0) {
4117 return NT_STATUS_INVALID_PARAMETER_MIX;
4118 }
4119
4120 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
4121
4122 if (session->smb2.session_flags & no_sign_flags) {
4123 session->smb2.should_sign = false;
4124 return NT_STATUS_OK;
4125 }
4126
4127 ZERO_STRUCT(session_key);
4128 memcpy(session_key, _session_key.data,
4129 MIN(_session_key.length, sizeof(session_key)));
4130
4131 session->smb2.signing_key = data_blob_talloc(session,
4132 session_key,
4133 sizeof(session_key));
4134 ZERO_STRUCT(session_key);
4135 if (session->smb2.signing_key.data == NULL) {
4136 return NT_STATUS_NO_MEMORY;
4137 }
4138
4139 session->smb2.application_key = data_blob_dup_talloc(session,
4140 session->smb2.signing_key);
4141 if (session->smb2.application_key.data == NULL) {
4142 return NT_STATUS_NO_MEMORY;
4143 }
4144
4145 session->smb2.channel_signing_key = data_blob_dup_talloc(session,
4146 session->smb2.signing_key);
4147 if (session->smb2.channel_signing_key.data == NULL) {
4148 return NT_STATUS_NO_MEMORY;
4149 }
4150
4151 status = smb2_signing_check_pdu(session->smb2.channel_signing_key,
4152 recv_iov, 3);
4153 if (!NT_STATUS_IS_OK(status)) {
4154 return status;
4155 }
4156
4157 session->smb2.should_sign = false;
4158
4159 if (conn->desire_signing) {
4160 session->smb2.should_sign = true;
4161 }
4162
4163 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
4164 session->smb2.should_sign = true;
4165 }
4166
4167 return NT_STATUS_OK;
4168 }
4169
4170 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
4171 struct smbXcli_session *session1,
4172 struct smbXcli_conn *conn,
4173 struct smbXcli_session **_session2)
4174 {
4175 struct smbXcli_session *session2;
4176
4177 if (session1->smb2.signing_key.length == 0) {
4178 return NT_STATUS_INVALID_PARAMETER_MIX;
4179 }
4180
4181 if (conn == NULL) {
4182 return NT_STATUS_INVALID_PARAMETER_MIX;
4183 }
4184
4185 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
4186 if (session2 == NULL) {
4187 return NT_STATUS_NO_MEMORY;
4188 }
4189 session2->smb2.session_id = session1->smb2.session_id;
4190 session2->smb2.session_flags = session1->smb2.session_flags;
4191
4192 session2->smb2.signing_key = data_blob_dup_talloc(session2,
4193 session1->smb2.signing_key);
4194 if (session2->smb2.signing_key.data == NULL) {
4195 return NT_STATUS_NO_MEMORY;
4196 }
4197
4198 session2->smb2.should_sign = session1->smb2.should_sign;
4199
4200 talloc_set_destructor(session2, smbXcli_session_destructor);
4201 DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
4202 session2->conn = conn;
4203
4204 *_session2 = session2;
4205 return NT_STATUS_OK;
4206 }
4207
4208 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
4209 const DATA_BLOB _channel_key,
4210 const struct iovec *recv_iov)
4211 {
4212 struct smbXcli_conn *conn = session->conn;
4213 uint8_t channel_key[16];
4214 NTSTATUS status;
4215
4216 if (conn == NULL) {
4217 return NT_STATUS_INVALID_PARAMETER_MIX;
4218 }
4219
4220 if (session->smb2.channel_signing_key.length != 0) {
4221 return NT_STATUS_INVALID_PARAMETER_MIX;
4222 }
4223
4224 ZERO_STRUCT(channel_key);
4225 memcpy(channel_key, _channel_key.data,
4226 MIN(_channel_key.length, sizeof(channel_key)));
4227
4228 session->smb2.channel_signing_key = data_blob_talloc(session,
4229 channel_key,
4230 sizeof(channel_key));
4231 ZERO_STRUCT(channel_key);
4232 if (session->smb2.channel_signing_key.data == NULL) {
4233 return NT_STATUS_NO_MEMORY;
4234 }
4235
4236 status = smb2_signing_check_pdu(session->smb2.channel_signing_key,
4237 recv_iov, 3);
4238 if (!NT_STATUS_IS_OK(status)) {
4239 return status;
4240 }
4241
4242 return NT_STATUS_OK;
4243 }
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