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libcli/smb: add smbXcli_tcon_{set,get}_fs_attributes()
[Samba.git] / libcli / smb / smbXcli_base.c
blobe9cec7c4a6b35e892a00e681b68964cc4ee5cbee
1 /*
2 Unix SMB/CIFS implementation.
3 Infrastructure for async SMB client requests
4 Copyright (C) Volker Lendecke 2008
5 Copyright (C) Stefan Metzmacher 2011
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "includes.h"
22 #include "system/network.h"
23 #include "../lib/async_req/async_sock.h"
24 #include "../lib/util/tevent_ntstatus.h"
25 #include "../lib/util/tevent_unix.h"
26 #include "lib/util/util_net.h"
27 #include "lib/util/dlinklist.h"
28 #include "../libcli/smb/smb_common.h"
29 #include "../libcli/smb/smb_seal.h"
30 #include "../libcli/smb/smb_signing.h"
31 #include "../libcli/smb/read_smb.h"
32 #include "smbXcli_base.h"
33 #include "librpc/ndr/libndr.h"
34
35 struct smbXcli_conn;
36 struct smbXcli_req;
37 struct smbXcli_session;
38 struct smbXcli_tcon;
39
40 struct smbXcli_conn {
41 int read_fd;
42 int write_fd;
43 struct sockaddr_storage local_ss;
44 struct sockaddr_storage remote_ss;
45 const char *remote_name;
46
47 struct tevent_queue *outgoing;
48 struct tevent_req **pending;
49 struct tevent_req *read_smb_req;
50
51 enum protocol_types protocol;
52 bool allow_signing;
53 bool desire_signing;
54 bool mandatory_signing;
55
56 /*
57 * The incoming dispatch function should return:
58 * - NT_STATUS_RETRY, if more incoming PDUs are expected.
59 * - NT_STATUS_OK, if no more processing is desired, e.g.
60 * the dispatch function called
61 * tevent_req_done().
62 * - All other return values disconnect the connection.
63 */
64 NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
65 TALLOC_CTX *tmp_mem,
66 uint8_t *inbuf);
67
68 struct {
69 struct {
70 uint32_t capabilities;
71 uint32_t max_xmit;
72 } client;
73
74 struct {
75 uint32_t capabilities;
76 uint32_t max_xmit;
77 uint16_t max_mux;
78 uint16_t security_mode;
79 bool readbraw;
80 bool writebraw;
81 bool lockread;
82 bool writeunlock;
83 uint32_t session_key;
84 struct GUID guid;
85 DATA_BLOB gss_blob;
86 uint8_t challenge[8];
87 const char *workgroup;
88 const char *name;
89 int time_zone;
90 NTTIME system_time;
91 } server;
92
93 uint32_t capabilities;
94 uint32_t max_xmit;
95
96 uint16_t mid;
97
98 struct smb_signing_state *signing;
99 struct smb_trans_enc_state *trans_enc;
100
101 struct tevent_req *read_braw_req;
102 } smb1;
103
104 struct {
105 struct {
106 uint32_t capabilities;
107 uint16_t security_mode;
108 struct GUID guid;
109 } client;
110
111 struct {
112 uint32_t capabilities;
113 uint16_t security_mode;
114 struct GUID guid;
115 uint32_t max_trans_size;
116 uint32_t max_read_size;
117 uint32_t max_write_size;
118 NTTIME system_time;
119 NTTIME start_time;
120 DATA_BLOB gss_blob;
121 } server;
122
123 uint64_t mid;
124 uint16_t cur_credits;
125 uint16_t max_credits;
126 } smb2;
127
128 struct smbXcli_session *sessions;
129 };
130
131 struct smb2cli_session {
132 uint64_t session_id;
133 uint16_t session_flags;
134 DATA_BLOB application_key;
135 DATA_BLOB signing_key;
136 bool should_sign;
137 bool should_encrypt;
138 DATA_BLOB encryption_key;
139 DATA_BLOB decryption_key;
140 uint64_t nonce_high;
141 uint64_t nonce_low;
142 uint16_t channel_sequence;
143 };
144
145 struct smbXcli_session {
146 struct smbXcli_session *prev, *next;
147 struct smbXcli_conn *conn;
148
149 struct {
150 uint16_t session_id;
151 DATA_BLOB application_key;
152 bool protected_key;
153 } smb1;
154
155 struct smb2cli_session *smb2;
156
157 struct {
158 DATA_BLOB signing_key;
159 } smb2_channel;
160
161 /*
162 * this should be a short term hack
163 * until the upper layers have implemented
164 * re-authentication.
165 */
166 bool disconnect_expired;
167 };
168
169 struct smbXcli_tcon {
170 bool is_smb1;
171 uint32_t fs_attributes;
172
173 struct {
174 uint16_t tcon_id;
175 uint16_t optional_support;
176 uint32_t maximal_access;
177 uint32_t guest_maximal_access;
178 char *service;
179 char *fs_type;
180 } smb1;
181
182 struct {
183 uint32_t tcon_id;
184 uint8_t type;
185 uint32_t flags;
186 uint32_t capabilities;
187 uint32_t maximal_access;
188 bool should_encrypt;
189 } smb2;
190 };
191
192 struct smbXcli_req_state {
193 struct tevent_context *ev;
194 struct smbXcli_conn *conn;
195 struct smbXcli_session *session; /* maybe NULL */
196 struct smbXcli_tcon *tcon; /* maybe NULL */
197
198 uint8_t length_hdr[4];
199
200 bool one_way;
201
202 uint8_t *inbuf;
203
204 struct {
205 /* Space for the header including the wct */
206 uint8_t hdr[HDR_VWV];
207
208 /*
209 * For normal requests, smb1cli_req_send chooses a mid.
210 * SecondaryV trans requests need to use the mid of the primary
211 * request, so we need a place to store it.
212 * Assume it is set if != 0.
213 */
214 uint16_t mid;
215
216 uint16_t *vwv;
217 uint8_t bytecount_buf[2];
218
219 #define MAX_SMB_IOV 10
220 /* length_hdr, hdr, words, byte_count, buffers */
221 struct iovec iov[1 + 3 + MAX_SMB_IOV];
222 int iov_count;
223
224 bool one_way_seqnum;
225 uint32_t seqnum;
226 struct tevent_req **chained_requests;
227
228 uint8_t recv_cmd;
229 NTSTATUS recv_status;
230 /* always an array of 3 talloc elements */
231 struct iovec *recv_iov;
232 } smb1;
233
234 struct {
235 const uint8_t *fixed;
236 uint16_t fixed_len;
237 const uint8_t *dyn;
238 uint32_t dyn_len;
239
240 uint8_t transform[SMB2_TF_HDR_SIZE];
241 uint8_t hdr[SMB2_HDR_BODY];
242 uint8_t pad[7]; /* padding space for compounding */
243
244 /*
245 * always an array of 3 talloc elements
246 * (without a SMB2_TRANSFORM header!)
247 *
248 * HDR, BODY, DYN
249 */
250 struct iovec *recv_iov;
251
252 /*
253 * the expected max for the response dyn_len
254 */
255 uint32_t max_dyn_len;
256
257 uint16_t credit_charge;
258
259 bool should_sign;
260 bool should_encrypt;
261 uint64_t encryption_session_id;
262
263 bool signing_skipped;
264 bool notify_async;
265 bool got_async;
266 } smb2;
267 };
268
269 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
270 {
271 /*
272 * NT_STATUS_OK, means we do not notify the callers
273 */
274 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
275
276 while (conn->sessions) {
277 conn->sessions->conn = NULL;
278 DLIST_REMOVE(conn->sessions, conn->sessions);
279 }
280
281 if (conn->smb1.trans_enc) {
282 TALLOC_FREE(conn->smb1.trans_enc);
283 }
284
285 return 0;
286 }
287
288 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
289 int fd,
290 const char *remote_name,
291 enum smb_signing_setting signing_state,
292 uint32_t smb1_capabilities,
293 struct GUID *client_guid,
294 uint32_t smb2_capabilities)
295 {
296 struct smbXcli_conn *conn = NULL;
297 void *ss = NULL;
298 struct sockaddr *sa = NULL;
299 socklen_t sa_length;
300 int ret;
301
302 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
303 if (!conn) {
304 return NULL;
305 }
306
307 conn->read_fd = fd;
308 conn->write_fd = dup(fd);
309 if (conn->write_fd == -1) {
310 goto error;
311 }
312
313 conn->remote_name = talloc_strdup(conn, remote_name);
314 if (conn->remote_name == NULL) {
315 goto error;
316 }
317
318
319 ss = (void *)&conn->local_ss;
320 sa = (struct sockaddr *)ss;
321 sa_length = sizeof(conn->local_ss);
322 ret = getsockname(fd, sa, &sa_length);
323 if (ret == -1) {
324 goto error;
325 }
326 ss = (void *)&conn->remote_ss;
327 sa = (struct sockaddr *)ss;
328 sa_length = sizeof(conn->remote_ss);
329 ret = getpeername(fd, sa, &sa_length);
330 if (ret == -1) {
331 goto error;
332 }
333
334 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
335 if (conn->outgoing == NULL) {
336 goto error;
337 }
338 conn->pending = NULL;
339
340 conn->protocol = PROTOCOL_NONE;
341
342 switch (signing_state) {
343 case SMB_SIGNING_OFF:
344 /* never */
345 conn->allow_signing = false;
346 conn->desire_signing = false;
347 conn->mandatory_signing = false;
348 break;
349 case SMB_SIGNING_DEFAULT:
350 case SMB_SIGNING_IF_REQUIRED:
351 /* if the server requires it */
352 conn->allow_signing = true;
353 conn->desire_signing = false;
354 conn->mandatory_signing = false;
355 break;
356 case SMB_SIGNING_REQUIRED:
357 /* always */
358 conn->allow_signing = true;
359 conn->desire_signing = true;
360 conn->mandatory_signing = true;
361 break;
362 }
363
364 conn->smb1.client.capabilities = smb1_capabilities;
365 conn->smb1.client.max_xmit = UINT16_MAX;
366
367 conn->smb1.capabilities = conn->smb1.client.capabilities;
368 conn->smb1.max_xmit = 1024;
369
370 conn->smb1.mid = 1;
371
372 /* initialise signing */
373 conn->smb1.signing = smb_signing_init(conn,
374 conn->allow_signing,
375 conn->desire_signing,
376 conn->mandatory_signing);
377 if (!conn->smb1.signing) {
378 goto error;
379 }
380
381 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
382 if (conn->mandatory_signing) {
383 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
384 }
385 if (client_guid) {
386 conn->smb2.client.guid = *client_guid;
387 }
388 conn->smb2.client.capabilities = smb2_capabilities;
389
390 conn->smb2.cur_credits = 1;
391 conn->smb2.max_credits = 0;
392
393 talloc_set_destructor(conn, smbXcli_conn_destructor);
394 return conn;
395
396 error:
397 if (conn->write_fd != -1) {
398 close(conn->write_fd);
399 }
400 TALLOC_FREE(conn);
401 return NULL;
402 }
403
404 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
405 {
406 if (conn == NULL) {
407 return false;
408 }
409
410 if (conn->read_fd == -1) {
411 return false;
412 }
413
414 return true;
415 }
416
417 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
418 {
419 return conn->protocol;
420 }
421
422 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
423 {
424 if (conn->protocol >= PROTOCOL_SMB2_02) {
425 return true;
426 }
427
428 if (conn->smb1.capabilities & CAP_UNICODE) {
429 return true;
430 }
431
432 return false;
433 }
434
435 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
436 {
437 set_socket_options(conn->read_fd, options);
438 }
439
440 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
441 {
442 return &conn->local_ss;
443 }
444
445 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
446 {
447 return &conn->remote_ss;
448 }
449
450 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
451 {
452 return conn->remote_name;
453 }
454
455 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
456 {
457 if (conn->protocol >= PROTOCOL_SMB2_02) {
458 /*
459 * TODO...
460 */
461 return 1;
462 }
463
464 return conn->smb1.server.max_mux;
465 }
466
467 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
468 {
469 if (conn->protocol >= PROTOCOL_SMB2_02) {
470 return conn->smb2.server.system_time;
471 }
472
473 return conn->smb1.server.system_time;
474 }
475
476 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
477 {
478 if (conn->protocol >= PROTOCOL_SMB2_02) {
479 return &conn->smb2.server.gss_blob;
480 }
481
482 return &conn->smb1.server.gss_blob;
483 }
484
485 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
486 {
487 if (conn->protocol >= PROTOCOL_SMB2_02) {
488 return &conn->smb2.server.guid;
489 }
490
491 return &conn->smb1.server.guid;
492 }
493
494 struct smbXcli_conn_samba_suicide_state {
495 struct smbXcli_conn *conn;
496 struct iovec iov;
497 uint8_t buf[9];
498 };
499
500 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
501
502 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
503 struct tevent_context *ev,
504 struct smbXcli_conn *conn,
505 uint8_t exitcode)
506 {
507 struct tevent_req *req, *subreq;
508 struct smbXcli_conn_samba_suicide_state *state;
509
510 req = tevent_req_create(mem_ctx, &state,
511 struct smbXcli_conn_samba_suicide_state);
512 if (req == NULL) {
513 return NULL;
514 }
515 state->conn = conn;
516 SIVAL(state->buf, 4, 0x74697865);
517 SCVAL(state->buf, 8, exitcode);
518 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
519
520 state->iov.iov_base = state->buf;
521 state->iov.iov_len = sizeof(state->buf);
522
523 subreq = writev_send(state, ev, conn->outgoing, conn->write_fd,
524 false, &state->iov, 1);
525 if (tevent_req_nomem(subreq, req)) {
526 return tevent_req_post(req, ev);
527 }
528 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
529 return req;
530 }
531
532 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
533 {
534 struct tevent_req *req = tevent_req_callback_data(
535 subreq, struct tevent_req);
536 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
537 req, struct smbXcli_conn_samba_suicide_state);
538 ssize_t nwritten;
539 int err;
540
541 nwritten = writev_recv(subreq, &err);
542 TALLOC_FREE(subreq);
543 if (nwritten == -1) {
544 NTSTATUS status = map_nt_error_from_unix_common(err);
545 smbXcli_conn_disconnect(state->conn, status);
546 return;
547 }
548 tevent_req_done(req);
549 }
550
551 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
552 {
553 return tevent_req_simple_recv_ntstatus(req);
554 }
555
556 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
557 uint8_t exitcode)
558 {
559 TALLOC_CTX *frame = talloc_stackframe();
560 struct tevent_context *ev;
561 struct tevent_req *req;
562 NTSTATUS status = NT_STATUS_NO_MEMORY;
563 bool ok;
564
565 if (smbXcli_conn_has_async_calls(conn)) {
566 /*
567 * Can't use sync call while an async call is in flight
568 */
569 status = NT_STATUS_INVALID_PARAMETER_MIX;
570 goto fail;
571 }
572 ev = samba_tevent_context_init(frame);
573 if (ev == NULL) {
574 goto fail;
575 }
576 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
577 if (req == NULL) {
578 goto fail;
579 }
580 ok = tevent_req_poll(req, ev);
581 if (!ok) {
582 status = map_nt_error_from_unix_common(errno);
583 goto fail;
584 }
585 status = smbXcli_conn_samba_suicide_recv(req);
586 fail:
587 TALLOC_FREE(frame);
588 return status;
589 }
590
591 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
592 {
593 return conn->smb1.capabilities;
594 }
595
596 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
597 {
598 return conn->smb1.max_xmit;
599 }
600
601 bool smb1cli_conn_req_possible(struct smbXcli_conn *conn)
602 {
603 size_t pending;
604 uint16_t possible = conn->smb1.server.max_mux;
605
606 pending = tevent_queue_length(conn->outgoing);
607 if (pending >= possible) {
608 return false;
609 }
610 pending += talloc_array_length(conn->pending);
611 if (pending >= possible) {
612 return false;
613 }
614
615 return true;
616 }
617
618 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
619 {
620 return conn->smb1.server.session_key;
621 }
622
623 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
624 {
625 return conn->smb1.server.challenge;
626 }
627
628 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
629 {
630 return conn->smb1.server.security_mode;
631 }
632
633 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
634 {
635 return conn->smb1.server.readbraw;
636 }
637
638 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
639 {
640 return conn->smb1.server.writebraw;
641 }
642
643 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
644 {
645 return conn->smb1.server.lockread;
646 }
647
648 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
649 {
650 return conn->smb1.server.writeunlock;
651 }
652
653 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
654 {
655 return conn->smb1.server.time_zone;
656 }
657
658 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
659 const DATA_BLOB user_session_key,
660 const DATA_BLOB response)
661 {
662 return smb_signing_activate(conn->smb1.signing,
663 user_session_key,
664 response);
665 }
666
667 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
668 const uint8_t *buf, uint32_t seqnum)
669 {
670 const uint8_t *hdr = buf + NBT_HDR_SIZE;
671 size_t len = smb_len_nbt(buf);
672
673 return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
674 }
675
676 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
677 {
678 return smb_signing_is_active(conn->smb1.signing);
679 }
680
681 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
682 struct smb_trans_enc_state *es)
683 {
684 /* Replace the old state, if any. */
685 if (conn->smb1.trans_enc) {
686 TALLOC_FREE(conn->smb1.trans_enc);
687 }
688 conn->smb1.trans_enc = es;
689 }
690
691 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
692 {
693 return common_encryption_on(conn->smb1.trans_enc);
694 }
695
696
697 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
698 {
699 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
700 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
701
702 if (NT_STATUS_IS_OK(status)) {
703 return NT_STATUS_OK;
704 }
705
706 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
707 return status;
708 }
709
710 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
711 }
712
713 /**
714 * Is the SMB command able to hold an AND_X successor
715 * @param[in] cmd The SMB command in question
716 * @retval Can we add a chained request after "cmd"?
717 */
718 bool smb1cli_is_andx_req(uint8_t cmd)
719 {
720 switch (cmd) {
721 case SMBtconX:
722 case SMBlockingX:
723 case SMBopenX:
724 case SMBreadX:
725 case SMBwriteX:
726 case SMBsesssetupX:
727 case SMBulogoffX:
728 case SMBntcreateX:
729 return true;
730 break;
731 default:
732 break;
733 }
734
735 return false;
736 }
737
738 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
739 {
740 size_t num_pending = talloc_array_length(conn->pending);
741 uint16_t result;
742
743 if (conn->protocol == PROTOCOL_NONE) {
744 /*
745 * This is what windows sends on the SMB1 Negprot request
746 * and some vendors reuse the SMB1 MID as SMB2 sequence number.
747 */
748 return 0;
749 }
750
751 while (true) {
752 size_t i;
753
754 result = conn->smb1.mid++;
755 if ((result == 0) || (result == 0xffff)) {
756 continue;
757 }
758
759 for (i=0; i<num_pending; i++) {
760 if (result == smb1cli_req_mid(conn->pending[i])) {
761 break;
762 }
763 }
764
765 if (i == num_pending) {
766 return result;
767 }
768 }
769 }
770
771 void smbXcli_req_unset_pending(struct tevent_req *req)
772 {
773 struct smbXcli_req_state *state =
774 tevent_req_data(req,
775 struct smbXcli_req_state);
776 struct smbXcli_conn *conn = state->conn;
777 size_t num_pending = talloc_array_length(conn->pending);
778 size_t i;
779
780 if (state->smb1.mid != 0) {
781 /*
782 * This is a [nt]trans[2] request which waits
783 * for more than one reply.
784 */
785 return;
786 }
787
788 talloc_set_destructor(req, NULL);
789
790 if (num_pending == 1) {
791 /*
792 * The pending read_smb tevent_req is a child of
793 * conn->pending. So if nothing is pending anymore, we need to
794 * delete the socket read fde.
795 */
796 TALLOC_FREE(conn->pending);
797 conn->read_smb_req = NULL;
798 return;
799 }
800
801 for (i=0; i<num_pending; i++) {
802 if (req == conn->pending[i]) {
803 break;
804 }
805 }
806 if (i == num_pending) {
807 /*
808 * Something's seriously broken. Just returning here is the
809 * right thing nevertheless, the point of this routine is to
810 * remove ourselves from conn->pending.
811 */
812 return;
813 }
814
815 /*
816 * Remove ourselves from the conn->pending array
817 */
818 for (; i < (num_pending - 1); i++) {
819 conn->pending[i] = conn->pending[i+1];
820 }
821
822 /*
823 * No NULL check here, we're shrinking by sizeof(void *), and
824 * talloc_realloc just adjusts the size for this.
825 */
826 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
827 num_pending - 1);
828 return;
829 }
830
831 static int smbXcli_req_destructor(struct tevent_req *req)
832 {
833 struct smbXcli_req_state *state =
834 tevent_req_data(req,
835 struct smbXcli_req_state);
836
837 /*
838 * Make sure we really remove it from
839 * the pending array on destruction.
840 */
841 state->smb1.mid = 0;
842 smbXcli_req_unset_pending(req);
843 return 0;
844 }
845
846 static bool smb1cli_req_cancel(struct tevent_req *req);
847 static bool smb2cli_req_cancel(struct tevent_req *req);
848
849 static bool smbXcli_req_cancel(struct tevent_req *req)
850 {
851 struct smbXcli_req_state *state =
852 tevent_req_data(req,
853 struct smbXcli_req_state);
854
855 if (!smbXcli_conn_is_connected(state->conn)) {
856 return false;
857 }
858
859 if (state->conn->protocol == PROTOCOL_NONE) {
860 return false;
861 }
862
863 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
864 return smb2cli_req_cancel(req);
865 }
866
867 return smb1cli_req_cancel(req);
868 }
869
870 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
871
872 bool smbXcli_req_set_pending(struct tevent_req *req)
873 {
874 struct smbXcli_req_state *state =
875 tevent_req_data(req,
876 struct smbXcli_req_state);
877 struct smbXcli_conn *conn;
878 struct tevent_req **pending;
879 size_t num_pending;
880
881 conn = state->conn;
882
883 if (!smbXcli_conn_is_connected(conn)) {
884 return false;
885 }
886
887 num_pending = talloc_array_length(conn->pending);
888
889 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
890 num_pending+1);
891 if (pending == NULL) {
892 return false;
893 }
894 pending[num_pending] = req;
895 conn->pending = pending;
896 talloc_set_destructor(req, smbXcli_req_destructor);
897 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
898
899 if (!smbXcli_conn_receive_next(conn)) {
900 /*
901 * the caller should notify the current request
902 *
903 * And all other pending requests get notified
904 * by smbXcli_conn_disconnect().
905 */
906 smbXcli_req_unset_pending(req);
907 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
908 return false;
909 }
910
911 return true;
912 }
913
914 static void smbXcli_conn_received(struct tevent_req *subreq);
915
916 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
917 {
918 size_t num_pending = talloc_array_length(conn->pending);
919 struct tevent_req *req;
920 struct smbXcli_req_state *state;
921
922 if (conn->read_smb_req != NULL) {
923 return true;
924 }
925
926 if (num_pending == 0) {
927 if (conn->smb2.mid < UINT64_MAX) {
928 /* no more pending requests, so we are done for now */
929 return true;
930 }
931
932 /*
933 * If there are no more SMB2 requests possible,
934 * because we are out of message ids,
935 * we need to disconnect.
936 */
937 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
938 return true;
939 }
940
941 req = conn->pending[0];
942 state = tevent_req_data(req, struct smbXcli_req_state);
943
944 /*
945 * We're the first ones, add the read_smb request that waits for the
946 * answer from the server
947 */
948 conn->read_smb_req = read_smb_send(conn->pending,
949 state->ev,
950 conn->read_fd);
951 if (conn->read_smb_req == NULL) {
952 return false;
953 }
954 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
955 return true;
956 }
957
958 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
959 {
960 struct smbXcli_session *session;
961
962 tevent_queue_stop(conn->outgoing);
963
964 if (conn->read_fd != -1) {
965 close(conn->read_fd);
966 }
967 if (conn->write_fd != -1) {
968 close(conn->write_fd);
969 }
970 conn->read_fd = -1;
971 conn->write_fd = -1;
972
973 session = conn->sessions;
974 if (talloc_array_length(conn->pending) == 0) {
975 /*
976 * if we do not have pending requests
977 * there is no need to update the channel_sequence
978 */
979 session = NULL;
980 }
981 for (; session; session = session->next) {
982 smb2cli_session_increment_channel_sequence(session);
983 }
984
985 /*
986 * Cancel all pending requests. We do not do a for-loop walking
987 * conn->pending because that array changes in
988 * smbXcli_req_unset_pending.
989 */
990 while (talloc_array_length(conn->pending) > 0) {
991 struct tevent_req *req;
992 struct smbXcli_req_state *state;
993 struct tevent_req **chain;
994 size_t num_chained;
995 size_t i;
996
997 req = conn->pending[0];
998 state = tevent_req_data(req, struct smbXcli_req_state);
999
1000 if (state->smb1.chained_requests == NULL) {
1001 /*
1002 * We're dead. No point waiting for trans2
1003 * replies.
1004 */
1005 state->smb1.mid = 0;
1006
1007 smbXcli_req_unset_pending(req);
1008
1009 if (NT_STATUS_IS_OK(status)) {
1010 /* do not notify the callers */
1011 continue;
1012 }
1013
1014 /*
1015 * we need to defer the callback, because we may notify
1016 * more then one caller.
1017 */
1018 tevent_req_defer_callback(req, state->ev);
1019 tevent_req_nterror(req, status);
1020 continue;
1021 }
1022
1023 chain = talloc_move(conn, &state->smb1.chained_requests);
1024 num_chained = talloc_array_length(chain);
1025
1026 for (i=0; i<num_chained; i++) {
1027 req = chain[i];
1028 state = tevent_req_data(req, struct smbXcli_req_state);
1029
1030 /*
1031 * We're dead. No point waiting for trans2
1032 * replies.
1033 */
1034 state->smb1.mid = 0;
1035
1036 smbXcli_req_unset_pending(req);
1037
1038 if (NT_STATUS_IS_OK(status)) {
1039 /* do not notify the callers */
1040 continue;
1041 }
1042
1043 /*
1044 * we need to defer the callback, because we may notify
1045 * more than one caller.
1046 */
1047 tevent_req_defer_callback(req, state->ev);
1048 tevent_req_nterror(req, status);
1049 }
1050 TALLOC_FREE(chain);
1051 }
1052 }
1053
1054 /*
1055 * Fetch a smb request's mid. Only valid after the request has been sent by
1056 * smb1cli_req_send().
1057 */
1058 uint16_t smb1cli_req_mid(struct tevent_req *req)
1059 {
1060 struct smbXcli_req_state *state =
1061 tevent_req_data(req,
1062 struct smbXcli_req_state);
1063
1064 if (state->smb1.mid != 0) {
1065 return state->smb1.mid;
1066 }
1067
1068 return SVAL(state->smb1.hdr, HDR_MID);
1069 }
1070
1071 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1072 {
1073 struct smbXcli_req_state *state =
1074 tevent_req_data(req,
1075 struct smbXcli_req_state);
1076
1077 state->smb1.mid = mid;
1078 }
1079
1080 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1081 {
1082 struct smbXcli_req_state *state =
1083 tevent_req_data(req,
1084 struct smbXcli_req_state);
1085
1086 return state->smb1.seqnum;
1087 }
1088
1089 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1090 {
1091 struct smbXcli_req_state *state =
1092 tevent_req_data(req,
1093 struct smbXcli_req_state);
1094
1095 state->smb1.seqnum = seqnum;
1096 }
1097
1098 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1099 {
1100 size_t result = 0;
1101 int i;
1102 for (i=0; i<count; i++) {
1103 result += iov[i].iov_len;
1104 }
1105 return result;
1106 }
1107
1108 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1109 const struct iovec *iov,
1110 int count)
1111 {
1112 size_t len = smbXcli_iov_len(iov, count);
1113 size_t copied;
1114 uint8_t *buf;
1115 int i;
1116
1117 buf = talloc_array(mem_ctx, uint8_t, len);
1118 if (buf == NULL) {
1119 return NULL;
1120 }
1121 copied = 0;
1122 for (i=0; i<count; i++) {
1123 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
1124 copied += iov[i].iov_len;
1125 }
1126 return buf;
1127 }
1128
1129 static void smb1cli_req_flags(enum protocol_types protocol,
1130 uint32_t smb1_capabilities,
1131 uint8_t smb_command,
1132 uint8_t additional_flags,
1133 uint8_t clear_flags,
1134 uint8_t *_flags,
1135 uint16_t additional_flags2,
1136 uint16_t clear_flags2,
1137 uint16_t *_flags2)
1138 {
1139 uint8_t flags = 0;
1140 uint16_t flags2 = 0;
1141
1142 if (protocol >= PROTOCOL_LANMAN1) {
1143 flags |= FLAG_CASELESS_PATHNAMES;
1144 flags |= FLAG_CANONICAL_PATHNAMES;
1145 }
1146
1147 if (protocol >= PROTOCOL_LANMAN2) {
1148 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1149 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1150 }
1151
1152 if (protocol >= PROTOCOL_NT1) {
1153 flags2 |= FLAGS2_IS_LONG_NAME;
1154
1155 if (smb1_capabilities & CAP_UNICODE) {
1156 flags2 |= FLAGS2_UNICODE_STRINGS;
1157 }
1158 if (smb1_capabilities & CAP_STATUS32) {
1159 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1160 }
1161 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1162 flags2 |= FLAGS2_EXTENDED_SECURITY;
1163 }
1164 }
1165
1166 flags |= additional_flags;
1167 flags &= ~clear_flags;
1168 flags2 |= additional_flags2;
1169 flags2 &= ~clear_flags2;
1170
1171 *_flags = flags;
1172 *_flags2 = flags2;
1173 }
1174
1175 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1176
1177 static bool smb1cli_req_cancel(struct tevent_req *req)
1178 {
1179 struct smbXcli_req_state *state =
1180 tevent_req_data(req,
1181 struct smbXcli_req_state);
1182 uint8_t flags;
1183 uint16_t flags2;
1184 uint32_t pid;
1185 uint16_t mid;
1186 struct tevent_req *subreq;
1187 NTSTATUS status;
1188
1189 flags = CVAL(state->smb1.hdr, HDR_FLG);
1190 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1191 pid = SVAL(state->smb1.hdr, HDR_PID);
1192 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1193 mid = SVAL(state->smb1.hdr, HDR_MID);
1194
1195 subreq = smb1cli_req_create(state, state->ev,
1196 state->conn,
1197 SMBntcancel,
1198 flags, 0,
1199 flags2, 0,
1200 0, /* timeout */
1201 pid,
1202 state->tcon,
1203 state->session,
1204 0, NULL, /* vwv */
1205 0, NULL); /* bytes */
1206 if (subreq == NULL) {
1207 return false;
1208 }
1209 smb1cli_req_set_mid(subreq, mid);
1210
1211 status = smb1cli_req_chain_submit(&subreq, 1);
1212 if (!NT_STATUS_IS_OK(status)) {
1213 TALLOC_FREE(subreq);
1214 return false;
1215 }
1216 smb1cli_req_set_mid(subreq, 0);
1217
1218 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1219
1220 return true;
1221 }
1222
1223 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1224 {
1225 /* we do not care about the result */
1226 TALLOC_FREE(subreq);
1227 }
1228
1229 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1230 struct tevent_context *ev,
1231 struct smbXcli_conn *conn,
1232 uint8_t smb_command,
1233 uint8_t additional_flags,
1234 uint8_t clear_flags,
1235 uint16_t additional_flags2,
1236 uint16_t clear_flags2,
1237 uint32_t timeout_msec,
1238 uint32_t pid,
1239 struct smbXcli_tcon *tcon,
1240 struct smbXcli_session *session,
1241 uint8_t wct, uint16_t *vwv,
1242 int iov_count,
1243 struct iovec *bytes_iov)
1244 {
1245 struct tevent_req *req;
1246 struct smbXcli_req_state *state;
1247 uint8_t flags = 0;
1248 uint16_t flags2 = 0;
1249 uint16_t uid = 0;
1250 uint16_t tid = 0;
1251
1252 if (iov_count > MAX_SMB_IOV) {
1253 /*
1254 * Should not happen :-)
1255 */
1256 return NULL;
1257 }
1258
1259 req = tevent_req_create(mem_ctx, &state,
1260 struct smbXcli_req_state);
1261 if (req == NULL) {
1262 return NULL;
1263 }
1264 state->ev = ev;
1265 state->conn = conn;
1266 state->session = session;
1267 state->tcon = tcon;
1268
1269 if (session) {
1270 uid = session->smb1.session_id;
1271 }
1272
1273 if (tcon) {
1274 tid = tcon->smb1.tcon_id;
1275 }
1276
1277 state->smb1.recv_cmd = 0xFF;
1278 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1279 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1280 if (state->smb1.recv_iov == NULL) {
1281 TALLOC_FREE(req);
1282 return NULL;
1283 }
1284
1285 smb1cli_req_flags(conn->protocol,
1286 conn->smb1.capabilities,
1287 smb_command,
1288 additional_flags,
1289 clear_flags,
1290 &flags,
1291 additional_flags2,
1292 clear_flags2,
1293 &flags2);
1294
1295 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1296 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1297 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1298 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1299 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1300 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1301 SSVAL(state->smb1.hdr, HDR_TID, tid);
1302 SSVAL(state->smb1.hdr, HDR_PID, pid);
1303 SSVAL(state->smb1.hdr, HDR_UID, uid);
1304 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1305 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1306
1307 state->smb1.vwv = vwv;
1308
1309 SSVAL(state->smb1.bytecount_buf, 0, smbXcli_iov_len(bytes_iov, iov_count));
1310
1311 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1312 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1313 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1314 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1315 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1316 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1317 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1318 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1319
1320 if (iov_count != 0) {
1321 memcpy(&state->smb1.iov[4], bytes_iov,
1322 iov_count * sizeof(*bytes_iov));
1323 }
1324 state->smb1.iov_count = iov_count + 4;
1325
1326 if (timeout_msec > 0) {
1327 struct timeval endtime;
1328
1329 endtime = timeval_current_ofs_msec(timeout_msec);
1330 if (!tevent_req_set_endtime(req, ev, endtime)) {
1331 return req;
1332 }
1333 }
1334
1335 switch (smb_command) {
1336 case SMBtranss:
1337 case SMBtranss2:
1338 case SMBnttranss:
1339 state->one_way = true;
1340 break;
1341 case SMBntcancel:
1342 state->one_way = true;
1343 state->smb1.one_way_seqnum = true;
1344 break;
1345 case SMBlockingX:
1346 if ((wct == 8) &&
1347 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1348 state->one_way = true;
1349 }
1350 break;
1351 }
1352
1353 return req;
1354 }
1355
1356 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1357 struct iovec *iov, int iov_count,
1358 uint32_t *seqnum,
1359 bool one_way_seqnum)
1360 {
1361 TALLOC_CTX *frame = NULL;
1362 uint8_t *buf;
1363
1364 /*
1365 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1366 * iovec directly. MD5Update would do that just fine.
1367 */
1368
1369 if (iov_count < 4) {
1370 return NT_STATUS_INVALID_PARAMETER_MIX;
1371 }
1372 if (iov[0].iov_len != NBT_HDR_SIZE) {
1373 return NT_STATUS_INVALID_PARAMETER_MIX;
1374 }
1375 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1376 return NT_STATUS_INVALID_PARAMETER_MIX;
1377 }
1378 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1379 return NT_STATUS_INVALID_PARAMETER_MIX;
1380 }
1381 if (iov[3].iov_len != sizeof(uint16_t)) {
1382 return NT_STATUS_INVALID_PARAMETER_MIX;
1383 }
1384
1385 frame = talloc_stackframe();
1386
1387 buf = smbXcli_iov_concat(frame, &iov[1], iov_count - 1);
1388 if (buf == NULL) {
1389 return NT_STATUS_NO_MEMORY;
1390 }
1391
1392 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1393 one_way_seqnum);
1394 smb_signing_sign_pdu(conn->smb1.signing,
1395 buf, talloc_get_size(buf),
1396 *seqnum);
1397 memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1398
1399 TALLOC_FREE(frame);
1400 return NT_STATUS_OK;
1401 }
1402
1403 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1404 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1405 TALLOC_CTX *tmp_mem,
1406 uint8_t *inbuf);
1407
1408 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1409 struct smbXcli_req_state *state,
1410 struct iovec *iov, int iov_count)
1411 {
1412 struct tevent_req *subreq;
1413 NTSTATUS status;
1414 uint8_t cmd;
1415 uint16_t mid;
1416
1417 if (!smbXcli_conn_is_connected(state->conn)) {
1418 return NT_STATUS_CONNECTION_DISCONNECTED;
1419 }
1420
1421 if (state->conn->protocol > PROTOCOL_NT1) {
1422 return NT_STATUS_REVISION_MISMATCH;
1423 }
1424
1425 if (iov_count < 4) {
1426 return NT_STATUS_INVALID_PARAMETER_MIX;
1427 }
1428 if (iov[0].iov_len != NBT_HDR_SIZE) {
1429 return NT_STATUS_INVALID_PARAMETER_MIX;
1430 }
1431 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1432 return NT_STATUS_INVALID_PARAMETER_MIX;
1433 }
1434 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1435 return NT_STATUS_INVALID_PARAMETER_MIX;
1436 }
1437 if (iov[3].iov_len != sizeof(uint16_t)) {
1438 return NT_STATUS_INVALID_PARAMETER_MIX;
1439 }
1440
1441 cmd = CVAL(iov[1].iov_base, HDR_COM);
1442 if (cmd == SMBreadBraw) {
1443 if (smbXcli_conn_has_async_calls(state->conn)) {
1444 return NT_STATUS_INVALID_PARAMETER_MIX;
1445 }
1446 state->conn->smb1.read_braw_req = req;
1447 }
1448
1449 if (state->smb1.mid != 0) {
1450 mid = state->smb1.mid;
1451 } else {
1452 mid = smb1cli_alloc_mid(state->conn);
1453 }
1454 SSVAL(iov[1].iov_base, HDR_MID, mid);
1455
1456 _smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
1457
1458 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1459 &state->smb1.seqnum,
1460 state->smb1.one_way_seqnum);
1461
1462 if (!NT_STATUS_IS_OK(status)) {
1463 return status;
1464 }
1465
1466 /*
1467 * If we supported multiple encrytion contexts
1468 * here we'd look up based on tid.
1469 */
1470 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1471 char *buf, *enc_buf;
1472
1473 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1474 if (buf == NULL) {
1475 return NT_STATUS_NO_MEMORY;
1476 }
1477 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1478 (char *)buf, &enc_buf);
1479 TALLOC_FREE(buf);
1480 if (!NT_STATUS_IS_OK(status)) {
1481 DEBUG(0, ("Error in encrypting client message: %s\n",
1482 nt_errstr(status)));
1483 return status;
1484 }
1485 buf = (char *)talloc_memdup(state, enc_buf,
1486 smb_len_nbt(enc_buf)+4);
1487 SAFE_FREE(enc_buf);
1488 if (buf == NULL) {
1489 return NT_STATUS_NO_MEMORY;
1490 }
1491 iov[0].iov_base = (void *)buf;
1492 iov[0].iov_len = talloc_get_size(buf);
1493 iov_count = 1;
1494 }
1495
1496 if (state->conn->dispatch_incoming == NULL) {
1497 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1498 }
1499
1500 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1501
1502 subreq = writev_send(state, state->ev, state->conn->outgoing,
1503 state->conn->write_fd, false, iov, iov_count);
1504 if (subreq == NULL) {
1505 return NT_STATUS_NO_MEMORY;
1506 }
1507 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1508 return NT_STATUS_OK;
1509 }
1510
1511 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1512 struct tevent_context *ev,
1513 struct smbXcli_conn *conn,
1514 uint8_t smb_command,
1515 uint8_t additional_flags,
1516 uint8_t clear_flags,
1517 uint16_t additional_flags2,
1518 uint16_t clear_flags2,
1519 uint32_t timeout_msec,
1520 uint32_t pid,
1521 struct smbXcli_tcon *tcon,
1522 struct smbXcli_session *session,
1523 uint8_t wct, uint16_t *vwv,
1524 uint32_t num_bytes,
1525 const uint8_t *bytes)
1526 {
1527 struct tevent_req *req;
1528 struct iovec iov;
1529 NTSTATUS status;
1530
1531 iov.iov_base = discard_const_p(void, bytes);
1532 iov.iov_len = num_bytes;
1533
1534 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1535 additional_flags, clear_flags,
1536 additional_flags2, clear_flags2,
1537 timeout_msec,
1538 pid, tcon, session,
1539 wct, vwv, 1, &iov);
1540 if (req == NULL) {
1541 return NULL;
1542 }
1543 if (!tevent_req_is_in_progress(req)) {
1544 return tevent_req_post(req, ev);
1545 }
1546 status = smb1cli_req_chain_submit(&req, 1);
1547 if (tevent_req_nterror(req, status)) {
1548 return tevent_req_post(req, ev);
1549 }
1550 return req;
1551 }
1552
1553 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1554 {
1555 struct tevent_req *req =
1556 tevent_req_callback_data(subreq,
1557 struct tevent_req);
1558 struct smbXcli_req_state *state =
1559 tevent_req_data(req,
1560 struct smbXcli_req_state);
1561 ssize_t nwritten;
1562 int err;
1563
1564 nwritten = writev_recv(subreq, &err);
1565 TALLOC_FREE(subreq);
1566 if (nwritten == -1) {
1567 NTSTATUS status = map_nt_error_from_unix_common(err);
1568 smbXcli_conn_disconnect(state->conn, status);
1569 return;
1570 }
1571
1572 if (state->one_way) {
1573 state->inbuf = NULL;
1574 tevent_req_done(req);
1575 return;
1576 }
1577
1578 if (!smbXcli_req_set_pending(req)) {
1579 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1580 return;
1581 }
1582 }
1583
1584 static void smbXcli_conn_received(struct tevent_req *subreq)
1585 {
1586 struct smbXcli_conn *conn =
1587 tevent_req_callback_data(subreq,
1588 struct smbXcli_conn);
1589 TALLOC_CTX *frame = talloc_stackframe();
1590 NTSTATUS status;
1591 uint8_t *inbuf;
1592 ssize_t received;
1593 int err;
1594
1595 if (subreq != conn->read_smb_req) {
1596 DEBUG(1, ("Internal error: cli_smb_received called with "
1597 "unexpected subreq\n"));
1598 status = NT_STATUS_INTERNAL_ERROR;
1599 smbXcli_conn_disconnect(conn, status);
1600 TALLOC_FREE(frame);
1601 return;
1602 }
1603 conn->read_smb_req = NULL;
1604
1605 received = read_smb_recv(subreq, frame, &inbuf, &err);
1606 TALLOC_FREE(subreq);
1607 if (received == -1) {
1608 status = map_nt_error_from_unix_common(err);
1609 smbXcli_conn_disconnect(conn, status);
1610 TALLOC_FREE(frame);
1611 return;
1612 }
1613
1614 status = conn->dispatch_incoming(conn, frame, inbuf);
1615 TALLOC_FREE(frame);
1616 if (NT_STATUS_IS_OK(status)) {
1617 /*
1618 * We should not do any more processing
1619 * as the dispatch function called
1620 * tevent_req_done().
1621 */
1622 return;
1623 } else if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1624 /*
1625 * We got an error, so notify all pending requests
1626 */
1627 smbXcli_conn_disconnect(conn, status);
1628 return;
1629 }
1630
1631 /*
1632 * We got NT_STATUS_RETRY, so we may ask for a
1633 * next incoming pdu.
1634 */
1635 if (!smbXcli_conn_receive_next(conn)) {
1636 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1637 }
1638 }
1639
1640 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1641 struct iovec **piov, int *pnum_iov)
1642 {
1643 struct iovec *iov;
1644 int num_iov;
1645 size_t buflen;
1646 size_t taken;
1647 size_t remaining;
1648 uint8_t *hdr;
1649 uint8_t cmd;
1650 uint32_t wct_ofs;
1651 NTSTATUS status;
1652 size_t min_size = MIN_SMB_SIZE;
1653
1654 buflen = smb_len_tcp(buf);
1655 taken = 0;
1656
1657 hdr = buf + NBT_HDR_SIZE;
1658
1659 status = smb1cli_pull_raw_error(hdr);
1660 if (NT_STATUS_IS_ERR(status)) {
1661 /*
1662 * This is an ugly hack to support OS/2
1663 * which skips the byte_count in the DATA block
1664 * on some error responses.
1665 *
1666 * See bug #9096
1667 */
1668 min_size -= sizeof(uint16_t);
1669 }
1670
1671 if (buflen < min_size) {
1672 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1673 }
1674
1675 /*
1676 * This returns iovec elements in the following order:
1677 *
1678 * - SMB header
1679 *
1680 * - Parameter Block
1681 * - Data Block
1682 *
1683 * - Parameter Block
1684 * - Data Block
1685 *
1686 * - Parameter Block
1687 * - Data Block
1688 */
1689 num_iov = 1;
1690
1691 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1692 if (iov == NULL) {
1693 return NT_STATUS_NO_MEMORY;
1694 }
1695 iov[0].iov_base = hdr;
1696 iov[0].iov_len = HDR_WCT;
1697 taken += HDR_WCT;
1698
1699 cmd = CVAL(hdr, HDR_COM);
1700 wct_ofs = HDR_WCT;
1701
1702 while (true) {
1703 size_t len = buflen - taken;
1704 struct iovec *cur;
1705 struct iovec *iov_tmp;
1706 uint8_t wct;
1707 uint32_t bcc_ofs;
1708 uint16_t bcc;
1709 size_t needed;
1710
1711 /*
1712 * we need at least WCT
1713 */
1714 needed = sizeof(uint8_t);
1715 if (len < needed) {
1716 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1717 __location__, (int)len, (int)needed));
1718 goto inval;
1719 }
1720
1721 /*
1722 * Now we check if the specified words are there
1723 */
1724 wct = CVAL(hdr, wct_ofs);
1725 needed += wct * sizeof(uint16_t);
1726 if (len < needed) {
1727 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1728 __location__, (int)len, (int)needed));
1729 goto inval;
1730 }
1731
1732 if ((num_iov == 1) &&
1733 (len == needed) &&
1734 NT_STATUS_IS_ERR(status))
1735 {
1736 /*
1737 * This is an ugly hack to support OS/2
1738 * which skips the byte_count in the DATA block
1739 * on some error responses.
1740 *
1741 * See bug #9096
1742 */
1743 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1744 num_iov + 2);
1745 if (iov_tmp == NULL) {
1746 TALLOC_FREE(iov);
1747 return NT_STATUS_NO_MEMORY;
1748 }
1749 iov = iov_tmp;
1750 cur = &iov[num_iov];
1751 num_iov += 2;
1752
1753 cur[0].iov_len = 0;
1754 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1755 cur[1].iov_len = 0;
1756 cur[1].iov_base = cur[0].iov_base;
1757
1758 taken += needed;
1759 break;
1760 }
1761
1762 /*
1763 * we need at least BCC
1764 */
1765 needed += sizeof(uint16_t);
1766 if (len < needed) {
1767 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1768 __location__, (int)len, (int)needed));
1769 goto inval;
1770 }
1771
1772 /*
1773 * Now we check if the specified bytes are there
1774 */
1775 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1776 bcc = SVAL(hdr, bcc_ofs);
1777 needed += bcc * sizeof(uint8_t);
1778 if (len < needed) {
1779 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1780 __location__, (int)len, (int)needed));
1781 goto inval;
1782 }
1783
1784 /*
1785 * we allocate 2 iovec structures for words and bytes
1786 */
1787 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1788 num_iov + 2);
1789 if (iov_tmp == NULL) {
1790 TALLOC_FREE(iov);
1791 return NT_STATUS_NO_MEMORY;
1792 }
1793 iov = iov_tmp;
1794 cur = &iov[num_iov];
1795 num_iov += 2;
1796
1797 cur[0].iov_len = wct * sizeof(uint16_t);
1798 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1799 cur[1].iov_len = bcc * sizeof(uint8_t);
1800 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1801
1802 taken += needed;
1803
1804 if (!smb1cli_is_andx_req(cmd)) {
1805 /*
1806 * If the current command does not have AndX chanining
1807 * we are done.
1808 */
1809 break;
1810 }
1811
1812 if (wct == 0 && bcc == 0) {
1813 /*
1814 * An empty response also ends the chain,
1815 * most likely with an error.
1816 */
1817 break;
1818 }
1819
1820 if (wct < 2) {
1821 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1822 __location__, (int)wct, (int)cmd));
1823 goto inval;
1824 }
1825 cmd = CVAL(cur[0].iov_base, 0);
1826 if (cmd == 0xFF) {
1827 /*
1828 * If it is the end of the chain we are also done.
1829 */
1830 break;
1831 }
1832 wct_ofs = SVAL(cur[0].iov_base, 2);
1833
1834 if (wct_ofs < taken) {
1835 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1836 }
1837 if (wct_ofs > buflen) {
1838 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1839 }
1840
1841 /*
1842 * we consumed everything up to the start of the next
1843 * parameter block.
1844 */
1845 taken = wct_ofs;
1846 }
1847
1848 remaining = buflen - taken;
1849
1850 if (remaining > 0 && num_iov >= 3) {
1851 /*
1852 * The last DATA block gets the remaining
1853 * bytes, this is needed to support
1854 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1855 */
1856 iov[num_iov-1].iov_len += remaining;
1857 }
1858
1859 *piov = iov;
1860 *pnum_iov = num_iov;
1861 return NT_STATUS_OK;
1862
1863 inval:
1864 TALLOC_FREE(iov);
1865 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1866 }
1867
1868 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1869 TALLOC_CTX *tmp_mem,
1870 uint8_t *inbuf)
1871 {
1872 struct tevent_req *req;
1873 struct smbXcli_req_state *state;
1874 NTSTATUS status;
1875 size_t num_pending;
1876 size_t i;
1877 uint8_t cmd;
1878 uint16_t mid;
1879 bool oplock_break;
1880 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1881 size_t len = smb_len_tcp(inbuf);
1882 struct iovec *iov = NULL;
1883 int num_iov = 0;
1884 struct tevent_req **chain = NULL;
1885 size_t num_chained = 0;
1886 size_t num_responses = 0;
1887
1888 if (conn->smb1.read_braw_req != NULL) {
1889 req = conn->smb1.read_braw_req;
1890 conn->smb1.read_braw_req = NULL;
1891 state = tevent_req_data(req, struct smbXcli_req_state);
1892
1893 smbXcli_req_unset_pending(req);
1894
1895 if (state->smb1.recv_iov == NULL) {
1896 /*
1897 * For requests with more than
1898 * one response, we have to readd the
1899 * recv_iov array.
1900 */
1901 state->smb1.recv_iov = talloc_zero_array(state,
1902 struct iovec,
1903 3);
1904 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1905 return NT_STATUS_OK;
1906 }
1907 }
1908
1909 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
1910 state->smb1.recv_iov[0].iov_len = len;
1911 ZERO_STRUCT(state->smb1.recv_iov[1]);
1912 ZERO_STRUCT(state->smb1.recv_iov[2]);
1913
1914 state->smb1.recv_cmd = SMBreadBraw;
1915 state->smb1.recv_status = NT_STATUS_OK;
1916 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1917
1918 tevent_req_done(req);
1919 return NT_STATUS_OK;
1920 }
1921
1922 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1923 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1924 DEBUG(10, ("Got non-SMB PDU\n"));
1925 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1926 }
1927
1928 /*
1929 * If we supported multiple encrytion contexts
1930 * here we'd look up based on tid.
1931 */
1932 if (common_encryption_on(conn->smb1.trans_enc)
1933 && (CVAL(inbuf, 0) == 0)) {
1934 uint16_t enc_ctx_num;
1935
1936 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1937 if (!NT_STATUS_IS_OK(status)) {
1938 DEBUG(10, ("get_enc_ctx_num returned %s\n",
1939 nt_errstr(status)));
1940 return status;
1941 }
1942
1943 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1944 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1945 enc_ctx_num,
1946 conn->smb1.trans_enc->enc_ctx_num));
1947 return NT_STATUS_INVALID_HANDLE;
1948 }
1949
1950 status = common_decrypt_buffer(conn->smb1.trans_enc,
1951 (char *)inbuf);
1952 if (!NT_STATUS_IS_OK(status)) {
1953 DEBUG(10, ("common_decrypt_buffer returned %s\n",
1954 nt_errstr(status)));
1955 return status;
1956 }
1957 inhdr = inbuf + NBT_HDR_SIZE;
1958 len = smb_len_nbt(inbuf);
1959 }
1960
1961 mid = SVAL(inhdr, HDR_MID);
1962 num_pending = talloc_array_length(conn->pending);
1963
1964 for (i=0; i<num_pending; i++) {
1965 if (mid == smb1cli_req_mid(conn->pending[i])) {
1966 break;
1967 }
1968 }
1969 if (i == num_pending) {
1970 /* Dump unexpected reply */
1971 return NT_STATUS_RETRY;
1972 }
1973
1974 oplock_break = false;
1975
1976 if (mid == 0xffff) {
1977 /*
1978 * Paranoia checks that this is really an oplock break request.
1979 */
1980 oplock_break = (len == 51); /* hdr + 8 words */
1981 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
1982 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
1983 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
1984 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
1985
1986 if (!oplock_break) {
1987 /* Dump unexpected reply */
1988 return NT_STATUS_RETRY;
1989 }
1990 }
1991
1992 req = conn->pending[i];
1993 state = tevent_req_data(req, struct smbXcli_req_state);
1994
1995 if (!oplock_break /* oplock breaks are not signed */
1996 && !smb_signing_check_pdu(conn->smb1.signing,
1997 inhdr, len, state->smb1.seqnum+1)) {
1998 DEBUG(10, ("cli_check_sign_mac failed\n"));
1999 return NT_STATUS_ACCESS_DENIED;
2000 }
2001
2002 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
2003 &iov, &num_iov);
2004 if (!NT_STATUS_IS_OK(status)) {
2005 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
2006 nt_errstr(status)));
2007 return status;
2008 }
2009
2010 cmd = CVAL(inhdr, HDR_COM);
2011 status = smb1cli_pull_raw_error(inhdr);
2012
2013 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
2014 (state->session != NULL) && state->session->disconnect_expired)
2015 {
2016 /*
2017 * this should be a short term hack
2018 * until the upper layers have implemented
2019 * re-authentication.
2020 */
2021 return status;
2022 }
2023
2024 if (state->smb1.chained_requests == NULL) {
2025 if (num_iov != 3) {
2026 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2027 }
2028
2029 smbXcli_req_unset_pending(req);
2030
2031 if (state->smb1.recv_iov == NULL) {
2032 /*
2033 * For requests with more than
2034 * one response, we have to readd the
2035 * recv_iov array.
2036 */
2037 state->smb1.recv_iov = talloc_zero_array(state,
2038 struct iovec,
2039 3);
2040 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2041 return NT_STATUS_OK;
2042 }
2043 }
2044
2045 state->smb1.recv_cmd = cmd;
2046 state->smb1.recv_status = status;
2047 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2048
2049 state->smb1.recv_iov[0] = iov[0];
2050 state->smb1.recv_iov[1] = iov[1];
2051 state->smb1.recv_iov[2] = iov[2];
2052
2053 if (talloc_array_length(conn->pending) == 0) {
2054 tevent_req_done(req);
2055 return NT_STATUS_OK;
2056 }
2057
2058 tevent_req_defer_callback(req, state->ev);
2059 tevent_req_done(req);
2060 return NT_STATUS_RETRY;
2061 }
2062
2063 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2064 num_chained = talloc_array_length(chain);
2065 num_responses = (num_iov - 1)/2;
2066
2067 if (num_responses > num_chained) {
2068 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2069 }
2070
2071 for (i=0; i<num_chained; i++) {
2072 size_t iov_idx = 1 + (i*2);
2073 struct iovec *cur = &iov[iov_idx];
2074 uint8_t *inbuf_ref;
2075
2076 req = chain[i];
2077 state = tevent_req_data(req, struct smbXcli_req_state);
2078
2079 smbXcli_req_unset_pending(req);
2080
2081 /*
2082 * as we finish multiple requests here
2083 * we need to defer the callbacks as
2084 * they could destroy our current stack state.
2085 */
2086 tevent_req_defer_callback(req, state->ev);
2087
2088 if (i >= num_responses) {
2089 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2090 continue;
2091 }
2092
2093 if (state->smb1.recv_iov == NULL) {
2094 /*
2095 * For requests with more than
2096 * one response, we have to readd the
2097 * recv_iov array.
2098 */
2099 state->smb1.recv_iov = talloc_zero_array(state,
2100 struct iovec,
2101 3);
2102 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2103 continue;
2104 }
2105 }
2106
2107 state->smb1.recv_cmd = cmd;
2108
2109 if (i == (num_responses - 1)) {
2110 /*
2111 * The last request in the chain gets the status
2112 */
2113 state->smb1.recv_status = status;
2114 } else {
2115 cmd = CVAL(cur[0].iov_base, 0);
2116 state->smb1.recv_status = NT_STATUS_OK;
2117 }
2118
2119 state->inbuf = inbuf;
2120
2121 /*
2122 * Note: here we use talloc_reference() in a way
2123 * that does not expose it to the caller.
2124 */
2125 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2126 if (tevent_req_nomem(inbuf_ref, req)) {
2127 continue;
2128 }
2129
2130 /* copy the related buffers */
2131 state->smb1.recv_iov[0] = iov[0];
2132 state->smb1.recv_iov[1] = cur[0];
2133 state->smb1.recv_iov[2] = cur[1];
2134
2135 tevent_req_done(req);
2136 }
2137
2138 return NT_STATUS_RETRY;
2139 }
2140
2141 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2142 TALLOC_CTX *mem_ctx,
2143 struct iovec **piov,
2144 uint8_t **phdr,
2145 uint8_t *pwct,
2146 uint16_t **pvwv,
2147 uint32_t *pvwv_offset,
2148 uint32_t *pnum_bytes,
2149 uint8_t **pbytes,
2150 uint32_t *pbytes_offset,
2151 uint8_t **pinbuf,
2152 const struct smb1cli_req_expected_response *expected,
2153 size_t num_expected)
2154 {
2155 struct smbXcli_req_state *state =
2156 tevent_req_data(req,
2157 struct smbXcli_req_state);
2158 NTSTATUS status = NT_STATUS_OK;
2159 struct iovec *recv_iov = NULL;
2160 uint8_t *hdr = NULL;
2161 uint8_t wct = 0;
2162 uint32_t vwv_offset = 0;
2163 uint16_t *vwv = NULL;
2164 uint32_t num_bytes = 0;
2165 uint32_t bytes_offset = 0;
2166 uint8_t *bytes = NULL;
2167 size_t i;
2168 bool found_status = false;
2169 bool found_size = false;
2170
2171 if (piov != NULL) {
2172 *piov = NULL;
2173 }
2174 if (phdr != NULL) {
2175 *phdr = 0;
2176 }
2177 if (pwct != NULL) {
2178 *pwct = 0;
2179 }
2180 if (pvwv != NULL) {
2181 *pvwv = NULL;
2182 }
2183 if (pvwv_offset != NULL) {
2184 *pvwv_offset = 0;
2185 }
2186 if (pnum_bytes != NULL) {
2187 *pnum_bytes = 0;
2188 }
2189 if (pbytes != NULL) {
2190 *pbytes = NULL;
2191 }
2192 if (pbytes_offset != NULL) {
2193 *pbytes_offset = 0;
2194 }
2195 if (pinbuf != NULL) {
2196 *pinbuf = NULL;
2197 }
2198
2199 if (state->inbuf != NULL) {
2200 recv_iov = state->smb1.recv_iov;
2201 state->smb1.recv_iov = NULL;
2202 if (state->smb1.recv_cmd != SMBreadBraw) {
2203 hdr = (uint8_t *)recv_iov[0].iov_base;
2204 wct = recv_iov[1].iov_len/2;
2205 vwv = (uint16_t *)recv_iov[1].iov_base;
2206 vwv_offset = PTR_DIFF(vwv, hdr);
2207 num_bytes = recv_iov[2].iov_len;
2208 bytes = (uint8_t *)recv_iov[2].iov_base;
2209 bytes_offset = PTR_DIFF(bytes, hdr);
2210 }
2211 }
2212
2213 if (tevent_req_is_nterror(req, &status)) {
2214 for (i=0; i < num_expected; i++) {
2215 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2216 found_status = true;
2217 break;
2218 }
2219 }
2220
2221 if (found_status) {
2222 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2223 }
2224
2225 return status;
2226 }
2227
2228 if (num_expected == 0) {
2229 found_status = true;
2230 found_size = true;
2231 }
2232
2233 status = state->smb1.recv_status;
2234
2235 for (i=0; i < num_expected; i++) {
2236 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2237 continue;
2238 }
2239
2240 found_status = true;
2241 if (expected[i].wct == 0) {
2242 found_size = true;
2243 break;
2244 }
2245
2246 if (expected[i].wct == wct) {
2247 found_size = true;
2248 break;
2249 }
2250 }
2251
2252 if (!found_status) {
2253 return status;
2254 }
2255
2256 if (!found_size) {
2257 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2258 }
2259
2260 if (piov != NULL) {
2261 *piov = talloc_move(mem_ctx, &recv_iov);
2262 }
2263
2264 if (phdr != NULL) {
2265 *phdr = hdr;
2266 }
2267 if (pwct != NULL) {
2268 *pwct = wct;
2269 }
2270 if (pvwv != NULL) {
2271 *pvwv = vwv;
2272 }
2273 if (pvwv_offset != NULL) {
2274 *pvwv_offset = vwv_offset;
2275 }
2276 if (pnum_bytes != NULL) {
2277 *pnum_bytes = num_bytes;
2278 }
2279 if (pbytes != NULL) {
2280 *pbytes = bytes;
2281 }
2282 if (pbytes_offset != NULL) {
2283 *pbytes_offset = bytes_offset;
2284 }
2285 if (pinbuf != NULL) {
2286 *pinbuf = state->inbuf;
2287 }
2288
2289 return status;
2290 }
2291
2292 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2293 {
2294 size_t wct_ofs;
2295 int i;
2296
2297 wct_ofs = HDR_WCT;
2298
2299 for (i=0; i<num_reqs; i++) {
2300 struct smbXcli_req_state *state;
2301 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2302 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2303 state->smb1.iov_count-2);
2304 wct_ofs = (wct_ofs + 3) & ~3;
2305 }
2306 return wct_ofs;
2307 }
2308
2309 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2310 {
2311 struct smbXcli_req_state *first_state =
2312 tevent_req_data(reqs[0],
2313 struct smbXcli_req_state);
2314 struct smbXcli_req_state *state;
2315 size_t wct_offset;
2316 size_t chain_padding = 0;
2317 int i, iovlen;
2318 struct iovec *iov = NULL;
2319 struct iovec *this_iov;
2320 NTSTATUS status;
2321 size_t nbt_len;
2322
2323 if (num_reqs == 1) {
2324 return smb1cli_req_writev_submit(reqs[0], first_state,
2325 first_state->smb1.iov,
2326 first_state->smb1.iov_count);
2327 }
2328
2329 iovlen = 0;
2330 for (i=0; i<num_reqs; i++) {
2331 if (!tevent_req_is_in_progress(reqs[i])) {
2332 return NT_STATUS_INTERNAL_ERROR;
2333 }
2334
2335 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2336
2337 if (state->smb1.iov_count < 4) {
2338 return NT_STATUS_INVALID_PARAMETER_MIX;
2339 }
2340
2341 if (i == 0) {
2342 /*
2343 * The NBT and SMB header
2344 */
2345 iovlen += 2;
2346 } else {
2347 /*
2348 * Chain padding
2349 */
2350 iovlen += 1;
2351 }
2352
2353 /*
2354 * words and bytes
2355 */
2356 iovlen += state->smb1.iov_count - 2;
2357 }
2358
2359 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2360 if (iov == NULL) {
2361 return NT_STATUS_NO_MEMORY;
2362 }
2363
2364 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2365 first_state, reqs, sizeof(*reqs) * num_reqs);
2366 if (first_state->smb1.chained_requests == NULL) {
2367 TALLOC_FREE(iov);
2368 return NT_STATUS_NO_MEMORY;
2369 }
2370
2371 wct_offset = HDR_WCT;
2372 this_iov = iov;
2373
2374 for (i=0; i<num_reqs; i++) {
2375 size_t next_padding = 0;
2376 uint16_t *vwv;
2377
2378 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2379
2380 if (i < num_reqs-1) {
2381 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2382 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2383 TALLOC_FREE(iov);
2384 TALLOC_FREE(first_state->smb1.chained_requests);
2385 return NT_STATUS_INVALID_PARAMETER_MIX;
2386 }
2387 }
2388
2389 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2390 state->smb1.iov_count-2) + 1;
2391 if ((wct_offset % 4) != 0) {
2392 next_padding = 4 - (wct_offset % 4);
2393 }
2394 wct_offset += next_padding;
2395 vwv = state->smb1.vwv;
2396
2397 if (i < num_reqs-1) {
2398 struct smbXcli_req_state *next_state =
2399 tevent_req_data(reqs[i+1],
2400 struct smbXcli_req_state);
2401 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2402 SCVAL(vwv+0, 1, 0);
2403 SSVAL(vwv+1, 0, wct_offset);
2404 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2405 /* properly end the chain */
2406 SCVAL(vwv+0, 0, 0xff);
2407 SCVAL(vwv+0, 1, 0xff);
2408 SSVAL(vwv+1, 0, 0);
2409 }
2410
2411 if (i == 0) {
2412 /*
2413 * The NBT and SMB header
2414 */
2415 this_iov[0] = state->smb1.iov[0];
2416 this_iov[1] = state->smb1.iov[1];
2417 this_iov += 2;
2418 } else {
2419 /*
2420 * This one is a bit subtle. We have to add
2421 * chain_padding bytes between the requests, and we
2422 * have to also include the wct field of the
2423 * subsequent requests. We use the subsequent header
2424 * for the padding, it contains the wct field in its
2425 * last byte.
2426 */
2427 this_iov[0].iov_len = chain_padding+1;
2428 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2429 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2430 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2431 this_iov += 1;
2432 }
2433
2434 /*
2435 * copy the words and bytes
2436 */
2437 memcpy(this_iov, state->smb1.iov+2,
2438 sizeof(struct iovec) * (state->smb1.iov_count-2));
2439 this_iov += state->smb1.iov_count - 2;
2440 chain_padding = next_padding;
2441 }
2442
2443 nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
2444 if (nbt_len > first_state->conn->smb1.max_xmit) {
2445 TALLOC_FREE(iov);
2446 TALLOC_FREE(first_state->smb1.chained_requests);
2447 return NT_STATUS_INVALID_PARAMETER_MIX;
2448 }
2449
2450 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2451 if (!NT_STATUS_IS_OK(status)) {
2452 TALLOC_FREE(iov);
2453 TALLOC_FREE(first_state->smb1.chained_requests);
2454 return status;
2455 }
2456
2457 return NT_STATUS_OK;
2458 }
2459
2460 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2461 {
2462 return ((tevent_queue_length(conn->outgoing) != 0)
2463 || (talloc_array_length(conn->pending) != 0));
2464 }
2465
2466 bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn)
2467 {
2468 if (conn->protocol >= PROTOCOL_SMB2_02) {
2469 return (smb2cli_conn_server_capabilities(conn) & SMB2_CAP_DFS);
2470 }
2471
2472 return (smb1cli_conn_capabilities(conn) & CAP_DFS);
2473 }
2474
2475 bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
2476 {
2477 uint16_t credits = 1;
2478
2479 if (conn->smb2.cur_credits == 0) {
2480 if (max_dyn_len != NULL) {
2481 *max_dyn_len = 0;
2482 }
2483 return false;
2484 }
2485
2486 if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2487 credits = conn->smb2.cur_credits;
2488 }
2489
2490 if (max_dyn_len != NULL) {
2491 *max_dyn_len = credits * 65536;
2492 }
2493
2494 return true;
2495 }
2496
2497 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2498 {
2499 return conn->smb2.server.capabilities;
2500 }
2501
2502 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2503 {
2504 return conn->smb2.server.security_mode;
2505 }
2506
2507 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2508 {
2509 return conn->smb2.server.max_trans_size;
2510 }
2511
2512 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2513 {
2514 return conn->smb2.server.max_read_size;
2515 }
2516
2517 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2518 {
2519 return conn->smb2.server.max_write_size;
2520 }
2521
2522 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2523 uint16_t max_credits)
2524 {
2525 conn->smb2.max_credits = max_credits;
2526 }
2527
2528 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2529
2530 static bool smb2cli_req_cancel(struct tevent_req *req)
2531 {
2532 struct smbXcli_req_state *state =
2533 tevent_req_data(req,
2534 struct smbXcli_req_state);
2535 uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2536 uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2537 uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
2538 struct smbXcli_tcon *tcon = state->tcon;
2539 struct smbXcli_session *session = state->session;
2540 uint8_t *fixed = state->smb2.pad;
2541 uint16_t fixed_len = 4;
2542 struct tevent_req *subreq;
2543 struct smbXcli_req_state *substate;
2544 NTSTATUS status;
2545
2546 SSVAL(fixed, 0, 0x04);
2547 SSVAL(fixed, 2, 0);
2548
2549 subreq = smb2cli_req_create(state, state->ev,
2550 state->conn,
2551 SMB2_OP_CANCEL,
2552 flags, 0,
2553 0, /* timeout */
2554 tcon, session,
2555 fixed, fixed_len,
2556 NULL, 0, 0);
2557 if (subreq == NULL) {
2558 return false;
2559 }
2560 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2561
2562 /*
2563 * clear everything but the SMB2_HDR_FLAG_ASYNC flag
2564 * e.g. if SMB2_HDR_FLAG_CHAINED is set we get INVALID_PARAMETER back
2565 */
2566 flags &= SMB2_HDR_FLAG_ASYNC;
2567
2568 if (flags & SMB2_HDR_FLAG_ASYNC) {
2569 mid = 0;
2570 }
2571
2572 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
2573 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2574 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
2575
2576 status = smb2cli_req_compound_submit(&subreq, 1);
2577 if (!NT_STATUS_IS_OK(status)) {
2578 TALLOC_FREE(subreq);
2579 return false;
2580 }
2581
2582 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2583
2584 return true;
2585 }
2586
2587 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2588 {
2589 /* we do not care about the result */
2590 TALLOC_FREE(subreq);
2591 }
2592
2593 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2594 struct tevent_context *ev,
2595 struct smbXcli_conn *conn,
2596 uint16_t cmd,
2597 uint32_t additional_flags,
2598 uint32_t clear_flags,
2599 uint32_t timeout_msec,
2600 struct smbXcli_tcon *tcon,
2601 struct smbXcli_session *session,
2602 const uint8_t *fixed,
2603 uint16_t fixed_len,
2604 const uint8_t *dyn,
2605 uint32_t dyn_len,
2606 uint32_t max_dyn_len)
2607 {
2608 struct tevent_req *req;
2609 struct smbXcli_req_state *state;
2610 uint32_t flags = 0;
2611 uint32_t tid = 0;
2612 uint64_t uid = 0;
2613 bool use_channel_sequence = false;
2614 uint16_t channel_sequence = 0;
2615
2616 req = tevent_req_create(mem_ctx, &state,
2617 struct smbXcli_req_state);
2618 if (req == NULL) {
2619 return NULL;
2620 }
2621
2622 state->ev = ev;
2623 state->conn = conn;
2624 state->session = session;
2625 state->tcon = tcon;
2626
2627 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2628 use_channel_sequence = true;
2629 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2630 use_channel_sequence = true;
2631 }
2632
2633 if (session) {
2634 uid = session->smb2->session_id;
2635
2636 if (use_channel_sequence) {
2637 channel_sequence = session->smb2->channel_sequence;
2638 }
2639
2640 state->smb2.should_sign = session->smb2->should_sign;
2641 state->smb2.should_encrypt = session->smb2->should_encrypt;
2642
2643 if (cmd == SMB2_OP_SESSSETUP &&
2644 session->smb2->signing_key.length != 0) {
2645 state->smb2.should_sign = true;
2646 }
2647
2648 if (cmd == SMB2_OP_SESSSETUP &&
2649 session->smb2_channel.signing_key.length == 0) {
2650 state->smb2.should_encrypt = false;
2651 }
2652 }
2653
2654 if (tcon) {
2655 tid = tcon->smb2.tcon_id;
2656
2657 if (tcon->smb2.should_encrypt) {
2658 state->smb2.should_encrypt = true;
2659 }
2660 }
2661
2662 if (state->smb2.should_encrypt) {
2663 state->smb2.should_sign = false;
2664 }
2665
2666 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2667 if (state->smb2.recv_iov == NULL) {
2668 TALLOC_FREE(req);
2669 return NULL;
2670 }
2671
2672 flags |= additional_flags;
2673 flags &= ~clear_flags;
2674
2675 state->smb2.fixed = fixed;
2676 state->smb2.fixed_len = fixed_len;
2677 state->smb2.dyn = dyn;
2678 state->smb2.dyn_len = dyn_len;
2679 state->smb2.max_dyn_len = max_dyn_len;
2680
2681 if (state->smb2.should_encrypt) {
2682 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2683 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2684 }
2685
2686 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
2687 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
2688 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
2689 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
2690 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
2691 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
2692 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
2693 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
2694
2695 switch (cmd) {
2696 case SMB2_OP_CANCEL:
2697 state->one_way = true;
2698 break;
2699 case SMB2_OP_BREAK:
2700 /*
2701 * If this is a dummy request, it will have
2702 * UINT64_MAX as message id.
2703 * If we send on break acknowledgement,
2704 * this gets overwritten later.
2705 */
2706 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2707 break;
2708 }
2709
2710 if (timeout_msec > 0) {
2711 struct timeval endtime;
2712
2713 endtime = timeval_current_ofs_msec(timeout_msec);
2714 if (!tevent_req_set_endtime(req, ev, endtime)) {
2715 return req;
2716 }
2717 }
2718
2719 return req;
2720 }
2721
2722 void smb2cli_req_set_notify_async(struct tevent_req *req)
2723 {
2724 struct smbXcli_req_state *state =
2725 tevent_req_data(req,
2726 struct smbXcli_req_state);
2727
2728 state->smb2.notify_async = true;
2729 }
2730
2731 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2732 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2733 TALLOC_CTX *tmp_mem,
2734 uint8_t *inbuf);
2735
2736 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2737 int num_reqs)
2738 {
2739 struct smbXcli_req_state *state;
2740 struct tevent_req *subreq;
2741 struct iovec *iov;
2742 int i, num_iov, nbt_len;
2743 int tf_iov = -1;
2744 const DATA_BLOB *encryption_key = NULL;
2745 uint64_t encryption_session_id = 0;
2746
2747 /*
2748 * 1 for the nbt length, optional TRANSFORM
2749 * per request: HDR, fixed, dyn, padding
2750 * -1 because the last one does not need padding
2751 */
2752
2753 iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
2754 if (iov == NULL) {
2755 return NT_STATUS_NO_MEMORY;
2756 }
2757
2758 num_iov = 1;
2759 nbt_len = 0;
2760
2761 /*
2762 * the session of the first request that requires encryption
2763 * specifies the encryption key.
2764 */
2765 for (i=0; i<num_reqs; i++) {
2766 if (!tevent_req_is_in_progress(reqs[i])) {
2767 return NT_STATUS_INTERNAL_ERROR;
2768 }
2769
2770 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2771
2772 if (!smbXcli_conn_is_connected(state->conn)) {
2773 return NT_STATUS_CONNECTION_DISCONNECTED;
2774 }
2775
2776 if ((state->conn->protocol != PROTOCOL_NONE) &&
2777 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2778 return NT_STATUS_REVISION_MISMATCH;
2779 }
2780
2781 if (state->session == NULL) {
2782 continue;
2783 }
2784
2785 if (!state->smb2.should_encrypt) {
2786 continue;
2787 }
2788
2789 encryption_key = &state->session->smb2->encryption_key;
2790 if (encryption_key->length == 0) {
2791 return NT_STATUS_INVALID_PARAMETER_MIX;
2792 }
2793
2794 encryption_session_id = state->session->smb2->session_id;
2795
2796 tf_iov = num_iov;
2797 iov[num_iov].iov_base = state->smb2.transform;
2798 iov[num_iov].iov_len = sizeof(state->smb2.transform);
2799 num_iov += 1;
2800
2801 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2802 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
2803 state->session->smb2->nonce_low);
2804 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
2805 state->session->smb2->nonce_high);
2806 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
2807 encryption_session_id);
2808
2809 state->session->smb2->nonce_low += 1;
2810 if (state->session->smb2->nonce_low == 0) {
2811 state->session->smb2->nonce_high += 1;
2812 state->session->smb2->nonce_low += 1;
2813 }
2814
2815 nbt_len += SMB2_TF_HDR_SIZE;
2816 break;
2817 }
2818
2819 for (i=0; i<num_reqs; i++) {
2820 int hdr_iov;
2821 size_t reqlen;
2822 bool ret;
2823 uint16_t opcode;
2824 uint64_t avail;
2825 uint16_t charge;
2826 uint16_t credits;
2827 uint64_t mid;
2828 const DATA_BLOB *signing_key = NULL;
2829
2830 if (!tevent_req_is_in_progress(reqs[i])) {
2831 return NT_STATUS_INTERNAL_ERROR;
2832 }
2833
2834 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2835
2836 if (!smbXcli_conn_is_connected(state->conn)) {
2837 return NT_STATUS_CONNECTION_DISCONNECTED;
2838 }
2839
2840 if ((state->conn->protocol != PROTOCOL_NONE) &&
2841 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2842 return NT_STATUS_REVISION_MISMATCH;
2843 }
2844
2845 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2846 if (opcode == SMB2_OP_CANCEL) {
2847 goto skip_credits;
2848 }
2849
2850 avail = UINT64_MAX - state->conn->smb2.mid;
2851 if (avail < 1) {
2852 return NT_STATUS_CONNECTION_ABORTED;
2853 }
2854
2855 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2856 uint32_t max_dyn_len = 1;
2857
2858 max_dyn_len = MAX(max_dyn_len, state->smb2.dyn_len);
2859 max_dyn_len = MAX(max_dyn_len, state->smb2.max_dyn_len);
2860
2861 charge = (max_dyn_len - 1)/ 65536 + 1;
2862 } else {
2863 charge = 1;
2864 }
2865
2866 charge = MAX(state->smb2.credit_charge, charge);
2867
2868 avail = MIN(avail, state->conn->smb2.cur_credits);
2869 if (avail < charge) {
2870 return NT_STATUS_INTERNAL_ERROR;
2871 }
2872
2873 credits = 0;
2874 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
2875 credits = state->conn->smb2.max_credits -
2876 state->conn->smb2.cur_credits;
2877 }
2878 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
2879 credits += 1;
2880 }
2881
2882 mid = state->conn->smb2.mid;
2883 state->conn->smb2.mid += charge;
2884 state->conn->smb2.cur_credits -= charge;
2885
2886 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2887 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
2888 }
2889 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
2890 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2891
2892 skip_credits:
2893 if (state->session && encryption_key == NULL) {
2894 /*
2895 * We prefer the channel signing key if it is
2896 * already there.
2897 */
2898 if (state->smb2.should_sign) {
2899 signing_key = &state->session->smb2_channel.signing_key;
2900 }
2901
2902 /*
2903 * If it is a channel binding, we already have the main
2904 * signing key and try that one.
2905 */
2906 if (signing_key && signing_key->length == 0) {
2907 signing_key = &state->session->smb2->signing_key;
2908 }
2909
2910 /*
2911 * If we do not have any session key yet, we skip the
2912 * signing of SMB2_OP_SESSSETUP requests.
2913 */
2914 if (signing_key && signing_key->length == 0) {
2915 signing_key = NULL;
2916 }
2917 }
2918
2919 hdr_iov = num_iov;
2920 iov[num_iov].iov_base = state->smb2.hdr;
2921 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
2922 num_iov += 1;
2923
2924 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2925 iov[num_iov].iov_len = state->smb2.fixed_len;
2926 num_iov += 1;
2927
2928 if (state->smb2.dyn != NULL) {
2929 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2930 iov[num_iov].iov_len = state->smb2.dyn_len;
2931 num_iov += 1;
2932 }
2933
2934 reqlen = sizeof(state->smb2.hdr);
2935 reqlen += state->smb2.fixed_len;
2936 reqlen += state->smb2.dyn_len;
2937
2938 if (i < num_reqs-1) {
2939 if ((reqlen % 8) > 0) {
2940 uint8_t pad = 8 - (reqlen % 8);
2941 iov[num_iov].iov_base = state->smb2.pad;
2942 iov[num_iov].iov_len = pad;
2943 num_iov += 1;
2944 reqlen += pad;
2945 }
2946 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
2947 }
2948
2949 state->smb2.encryption_session_id = encryption_session_id;
2950
2951 if (signing_key != NULL) {
2952 NTSTATUS status;
2953
2954 status = smb2_signing_sign_pdu(*signing_key,
2955 state->session->conn->protocol,
2956 &iov[hdr_iov], num_iov - hdr_iov);
2957 if (!NT_STATUS_IS_OK(status)) {
2958 return status;
2959 }
2960 }
2961
2962 nbt_len += reqlen;
2963
2964 ret = smbXcli_req_set_pending(reqs[i]);
2965 if (!ret) {
2966 return NT_STATUS_NO_MEMORY;
2967 }
2968 }
2969
2970 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
2971 _smb_setlen_tcp(state->length_hdr, nbt_len);
2972 iov[0].iov_base = state->length_hdr;
2973 iov[0].iov_len = sizeof(state->length_hdr);
2974
2975 if (encryption_key != NULL) {
2976 NTSTATUS status;
2977 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
2978 uint8_t *buf;
2979 int vi;
2980
2981 buf = talloc_array(iov, uint8_t, buflen);
2982 if (buf == NULL) {
2983 return NT_STATUS_NO_MEMORY;
2984 }
2985
2986 /*
2987 * We copy the buffers before encrypting them,
2988 * this is at least currently needed for the
2989 * to keep state->smb2.hdr.
2990 *
2991 * Also the callers may expect there buffers
2992 * to be const.
2993 */
2994 for (vi = tf_iov + 1; vi < num_iov; vi++) {
2995 struct iovec *v = &iov[vi];
2996 const uint8_t *o = (const uint8_t *)v->iov_base;
2997
2998 memcpy(buf, o, v->iov_len);
2999 v->iov_base = (void *)buf;
3000 buf += v->iov_len;
3001 }
3002
3003 status = smb2_signing_encrypt_pdu(*encryption_key,
3004 state->conn->protocol,
3005 &iov[tf_iov], num_iov - tf_iov);
3006 if (!NT_STATUS_IS_OK(status)) {
3007 return status;
3008 }
3009 }
3010
3011 if (state->conn->dispatch_incoming == NULL) {
3012 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3013 }
3014
3015 subreq = writev_send(state, state->ev, state->conn->outgoing,
3016 state->conn->write_fd, false, iov, num_iov);
3017 if (subreq == NULL) {
3018 return NT_STATUS_NO_MEMORY;
3019 }
3020 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
3021 return NT_STATUS_OK;
3022 }
3023
3024 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
3025 {
3026 struct smbXcli_req_state *state =
3027 tevent_req_data(req,
3028 struct smbXcli_req_state);
3029
3030 state->smb2.credit_charge = charge;
3031 }
3032
3033 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
3034 struct tevent_context *ev,
3035 struct smbXcli_conn *conn,
3036 uint16_t cmd,
3037 uint32_t additional_flags,
3038 uint32_t clear_flags,
3039 uint32_t timeout_msec,
3040 struct smbXcli_tcon *tcon,
3041 struct smbXcli_session *session,
3042 const uint8_t *fixed,
3043 uint16_t fixed_len,
3044 const uint8_t *dyn,
3045 uint32_t dyn_len,
3046 uint32_t max_dyn_len)
3047 {
3048 struct tevent_req *req;
3049 NTSTATUS status;
3050
3051 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
3052 additional_flags, clear_flags,
3053 timeout_msec,
3054 tcon, session,
3055 fixed, fixed_len,
3056 dyn, dyn_len,
3057 max_dyn_len);
3058 if (req == NULL) {
3059 return NULL;
3060 }
3061 if (!tevent_req_is_in_progress(req)) {
3062 return tevent_req_post(req, ev);
3063 }
3064 status = smb2cli_req_compound_submit(&req, 1);
3065 if (tevent_req_nterror(req, status)) {
3066 return tevent_req_post(req, ev);
3067 }
3068 return req;
3069 }
3070
3071 static void smb2cli_req_writev_done(struct tevent_req *subreq)
3072 {
3073 struct tevent_req *req =
3074 tevent_req_callback_data(subreq,
3075 struct tevent_req);
3076 struct smbXcli_req_state *state =
3077 tevent_req_data(req,
3078 struct smbXcli_req_state);
3079 ssize_t nwritten;
3080 int err;
3081
3082 nwritten = writev_recv(subreq, &err);
3083 TALLOC_FREE(subreq);
3084 if (nwritten == -1) {
3085 /* here, we need to notify all pending requests */
3086 NTSTATUS status = map_nt_error_from_unix_common(err);
3087 smbXcli_conn_disconnect(state->conn, status);
3088 return;
3089 }
3090 }
3091
3092 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3093 uint8_t *buf,
3094 size_t buflen,
3095 TALLOC_CTX *mem_ctx,
3096 struct iovec **piov, int *pnum_iov)
3097 {
3098 struct iovec *iov;
3099 int num_iov = 0;
3100 size_t taken = 0;
3101 uint8_t *first_hdr = buf;
3102 size_t verified_buflen = 0;
3103 uint8_t *tf = NULL;
3104 size_t tf_len = 0;
3105
3106 iov = talloc_array(mem_ctx, struct iovec, num_iov);
3107 if (iov == NULL) {
3108 return NT_STATUS_NO_MEMORY;
3109 }
3110
3111 while (taken < buflen) {
3112 size_t len = buflen - taken;
3113 uint8_t *hdr = first_hdr + taken;
3114 struct iovec *cur;
3115 size_t full_size;
3116 size_t next_command_ofs;
3117 uint16_t body_size;
3118 struct iovec *iov_tmp;
3119
3120 if (verified_buflen > taken) {
3121 len = verified_buflen - taken;
3122 } else {
3123 tf = NULL;
3124 tf_len = 0;
3125 }
3126
3127 if (len < 4) {
3128 DEBUG(10, ("%d bytes left, expected at least %d\n",
3129 (int)len, 4));
3130 goto inval;
3131 }
3132 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3133 struct smbXcli_session *s;
3134 uint64_t uid;
3135 struct iovec tf_iov[2];
3136 size_t enc_len;
3137 NTSTATUS status;
3138
3139 if (len < SMB2_TF_HDR_SIZE) {
3140 DEBUG(10, ("%d bytes left, expected at least %d\n",
3141 (int)len, SMB2_TF_HDR_SIZE));
3142 goto inval;
3143 }
3144 tf = hdr;
3145 tf_len = SMB2_TF_HDR_SIZE;
3146 taken += tf_len;
3147
3148 hdr = first_hdr + taken;
3149 enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3150 uid = BVAL(tf, SMB2_TF_SESSION_ID);
3151
3152 if (len < SMB2_TF_HDR_SIZE + enc_len) {
3153 DEBUG(10, ("%d bytes left, expected at least %d\n",
3154 (int)len,
3155 (int)(SMB2_TF_HDR_SIZE + enc_len)));
3156 goto inval;
3157 }
3158
3159 s = conn->sessions;
3160 for (; s; s = s->next) {
3161 if (s->smb2->session_id != uid) {
3162 continue;
3163 }
3164 break;
3165 }
3166
3167 if (s == NULL) {
3168 DEBUG(10, ("unknown session_id %llu\n",
3169 (unsigned long long)uid));
3170 goto inval;
3171 }
3172
3173 tf_iov[0].iov_base = (void *)tf;
3174 tf_iov[0].iov_len = tf_len;
3175 tf_iov[1].iov_base = (void *)hdr;
3176 tf_iov[1].iov_len = enc_len;
3177
3178 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3179 conn->protocol,
3180 tf_iov, 2);
3181 if (!NT_STATUS_IS_OK(status)) {
3182 TALLOC_FREE(iov);
3183 return status;
3184 }
3185
3186 verified_buflen = taken + enc_len;
3187 len = enc_len;
3188 }
3189
3190 /*
3191 * We need the header plus the body length field
3192 */
3193
3194 if (len < SMB2_HDR_BODY + 2) {
3195 DEBUG(10, ("%d bytes left, expected at least %d\n",
3196 (int)len, SMB2_HDR_BODY));
3197 goto inval;
3198 }
3199 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3200 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3201 IVAL(hdr, 0)));
3202 goto inval;
3203 }
3204 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3205 DEBUG(10, ("Got HDR len %d, expected %d\n",
3206 SVAL(hdr, 4), SMB2_HDR_BODY));
3207 goto inval;
3208 }
3209
3210 full_size = len;
3211 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3212 body_size = SVAL(hdr, SMB2_HDR_BODY);
3213
3214 if (next_command_ofs != 0) {
3215 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3216 goto inval;
3217 }
3218 if (next_command_ofs > full_size) {
3219 goto inval;
3220 }
3221 full_size = next_command_ofs;
3222 }
3223 if (body_size < 2) {
3224 goto inval;
3225 }
3226 body_size &= 0xfffe;
3227
3228 if (body_size > (full_size - SMB2_HDR_BODY)) {
3229 goto inval;
3230 }
3231
3232 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3233 num_iov + 4);
3234 if (iov_tmp == NULL) {
3235 TALLOC_FREE(iov);
3236 return NT_STATUS_NO_MEMORY;
3237 }
3238 iov = iov_tmp;
3239 cur = &iov[num_iov];
3240 num_iov += 4;
3241
3242 cur[0].iov_base = tf;
3243 cur[0].iov_len = tf_len;
3244 cur[1].iov_base = hdr;
3245 cur[1].iov_len = SMB2_HDR_BODY;
3246 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3247 cur[2].iov_len = body_size;
3248 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3249 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3250
3251 taken += full_size;
3252 }
3253
3254 *piov = iov;
3255 *pnum_iov = num_iov;
3256 return NT_STATUS_OK;
3257
3258 inval:
3259 TALLOC_FREE(iov);
3260 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3261 }
3262
3263 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3264 uint64_t mid)
3265 {
3266 size_t num_pending = talloc_array_length(conn->pending);
3267 size_t i;
3268
3269 for (i=0; i<num_pending; i++) {
3270 struct tevent_req *req = conn->pending[i];
3271 struct smbXcli_req_state *state =
3272 tevent_req_data(req,
3273 struct smbXcli_req_state);
3274
3275 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3276 return req;
3277 }
3278 }
3279 return NULL;
3280 }
3281
3282 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3283 TALLOC_CTX *tmp_mem,
3284 uint8_t *inbuf)
3285 {
3286 struct tevent_req *req;
3287 struct smbXcli_req_state *state = NULL;
3288 struct iovec *iov;
3289 int i, num_iov;
3290 NTSTATUS status;
3291 bool defer = true;
3292 struct smbXcli_session *last_session = NULL;
3293 size_t inbuf_len = smb_len_tcp(inbuf);
3294
3295 status = smb2cli_inbuf_parse_compound(conn,
3296 inbuf + NBT_HDR_SIZE,
3297 inbuf_len,
3298 tmp_mem,
3299 &iov, &num_iov);
3300 if (!NT_STATUS_IS_OK(status)) {
3301 return status;
3302 }
3303
3304 for (i=0; i<num_iov; i+=4) {
3305 uint8_t *inbuf_ref = NULL;
3306 struct iovec *cur = &iov[i];
3307 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3308 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3309 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3310 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3311 uint16_t req_opcode;
3312 uint32_t req_flags;
3313 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3314 uint32_t new_credits;
3315 struct smbXcli_session *session = NULL;
3316 const DATA_BLOB *signing_key = NULL;
3317 bool was_encrypted = false;
3318
3319 new_credits = conn->smb2.cur_credits;
3320 new_credits += credits;
3321 if (new_credits > UINT16_MAX) {
3322 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3323 }
3324 conn->smb2.cur_credits += credits;
3325
3326 req = smb2cli_conn_find_pending(conn, mid);
3327 if (req == NULL) {
3328 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3329 }
3330 state = tevent_req_data(req, struct smbXcli_req_state);
3331
3332 state->smb2.got_async = false;
3333
3334 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3335 if (opcode != req_opcode) {
3336 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3337 }
3338 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3339
3340 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3341 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3342 }
3343
3344 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3345 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3346 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3347 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3348
3349 /*
3350 * async interim responses are not signed,
3351 * even if the SMB2_HDR_FLAG_SIGNED flag
3352 * is set.
3353 */
3354 req_flags |= SMB2_HDR_FLAG_ASYNC;
3355 SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
3356 SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
3357
3358 if (state->smb2.notify_async) {
3359 state->smb2.got_async = true;
3360 tevent_req_defer_callback(req, state->ev);
3361 tevent_req_notify_callback(req);
3362 }
3363 continue;
3364 }
3365
3366 session = state->session;
3367 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3368 session = last_session;
3369 }
3370 last_session = session;
3371
3372 if (state->smb2.should_sign) {
3373 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3374 return NT_STATUS_ACCESS_DENIED;
3375 }
3376 }
3377
3378 if (flags & SMB2_HDR_FLAG_SIGNED) {
3379 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3380
3381 if (session == NULL) {
3382 struct smbXcli_session *s;
3383
3384 s = state->conn->sessions;
3385 for (; s; s = s->next) {
3386 if (s->smb2->session_id != uid) {
3387 continue;
3388 }
3389
3390 session = s;
3391 break;
3392 }
3393 }
3394
3395 if (session == NULL) {
3396 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3397 }
3398
3399 last_session = session;
3400 signing_key = &session->smb2_channel.signing_key;
3401 }
3402
3403 if (opcode == SMB2_OP_SESSSETUP) {
3404 /*
3405 * We prefer the channel signing key, if it is
3406 * already there.
3407 *
3408 * If we do not have a channel signing key yet,
3409 * we try the main signing key, if it is not
3410 * the final response.
3411 */
3412 if (signing_key && signing_key->length == 0 &&
3413 !NT_STATUS_IS_OK(status)) {
3414 signing_key = &session->smb2->signing_key;
3415 }
3416
3417 if (signing_key && signing_key->length == 0) {
3418 /*
3419 * If we do not have a session key to
3420 * verify the signature, we defer the
3421 * signing check to the caller.
3422 *
3423 * The caller gets NT_STATUS_OK, it
3424 * has to call
3425 * smb2cli_session_set_session_key()
3426 * or
3427 * smb2cli_session_set_channel_key()
3428 * which will check the signature
3429 * with the channel signing key.
3430 */
3431 signing_key = NULL;
3432 }
3433 }
3434
3435 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3436 const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3437 uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3438
3439 /*
3440 * If the response was encrypted in a SMB2_TRANSFORM
3441 * pdu, which belongs to the correct session,
3442 * we do not need to do signing checks
3443 *
3444 * It could be the session the response belongs to
3445 * or the session that was used to encrypt the
3446 * SMB2_TRANSFORM request.
3447 */
3448 if ((session && session->smb2->session_id == uid) ||
3449 (state->smb2.encryption_session_id == uid)) {
3450 signing_key = NULL;
3451 was_encrypted = true;
3452 }
3453 }
3454
3455 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3456 /*
3457 * if the server returns NT_STATUS_USER_SESSION_DELETED
3458 * the response is not signed and we should
3459 * propagate the NT_STATUS_USER_SESSION_DELETED
3460 * status to the caller.
3461 */
3462 state->smb2.signing_skipped = true;
3463 signing_key = NULL;
3464 }
3465
3466 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3467 /*
3468 * if the server returns
3469 * NT_STATUS_INVALID_PARAMETER
3470 * the response might not be encrypted.
3471 */
3472 if (state->smb2.should_encrypt && !was_encrypted) {
3473 state->smb2.signing_skipped = true;
3474 signing_key = NULL;
3475 }
3476 }
3477
3478 if (state->smb2.should_encrypt && !was_encrypted) {
3479 if (!state->smb2.signing_skipped) {
3480 return NT_STATUS_ACCESS_DENIED;
3481 }
3482 }
3483
3484 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3485 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3486 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3487 /*
3488 * if the server returns
3489 * NT_STATUS_NETWORK_NAME_DELETED
3490 * NT_STATUS_FILE_CLOSED
3491 * NT_STATUS_INVALID_PARAMETER
3492 * the response might not be signed
3493 * as this happens before the signing checks.
3494 *
3495 * If server echos the signature (or all zeros)
3496 * we should report the status from the server
3497 * to the caller.
3498 */
3499 if (signing_key) {
3500 int cmp;
3501
3502 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3503 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3504 16);
3505 if (cmp == 0) {
3506 state->smb2.signing_skipped = true;
3507 signing_key = NULL;
3508 }
3509 }
3510 if (signing_key) {
3511 int cmp;
3512 static const uint8_t zeros[16];
3513
3514 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3515 zeros,
3516 16);
3517 if (cmp == 0) {
3518 state->smb2.signing_skipped = true;
3519 signing_key = NULL;
3520 }
3521 }
3522 }
3523
3524 if (signing_key) {
3525 status = smb2_signing_check_pdu(*signing_key,
3526 state->conn->protocol,
3527 &cur[1], 3);
3528 if (!NT_STATUS_IS_OK(status)) {
3529 /*
3530 * If the signing check fails, we disconnect
3531 * the connection.
3532 */
3533 return status;
3534 }
3535 }
3536
3537 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
3538 (session != NULL) && session->disconnect_expired)
3539 {
3540 /*
3541 * this should be a short term hack
3542 * until the upper layers have implemented
3543 * re-authentication.
3544 */
3545 return status;
3546 }
3547
3548 smbXcli_req_unset_pending(req);
3549
3550 /*
3551 * There might be more than one response
3552 * we need to defer the notifications
3553 */
3554 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3555 defer = false;
3556 }
3557
3558 if (defer) {
3559 tevent_req_defer_callback(req, state->ev);
3560 }
3561
3562 /*
3563 * Note: here we use talloc_reference() in a way
3564 * that does not expose it to the caller.
3565 */
3566 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3567 if (tevent_req_nomem(inbuf_ref, req)) {
3568 continue;
3569 }
3570
3571 /* copy the related buffers */
3572 state->smb2.recv_iov[0] = cur[1];
3573 state->smb2.recv_iov[1] = cur[2];
3574 state->smb2.recv_iov[2] = cur[3];
3575
3576 tevent_req_done(req);
3577 }
3578
3579 if (defer) {
3580 return NT_STATUS_RETRY;
3581 }
3582
3583 return NT_STATUS_OK;
3584 }
3585
3586 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3587 struct iovec **piov,
3588 const struct smb2cli_req_expected_response *expected,
3589 size_t num_expected)
3590 {
3591 struct smbXcli_req_state *state =
3592 tevent_req_data(req,
3593 struct smbXcli_req_state);
3594 NTSTATUS status;
3595 size_t body_size;
3596 bool found_status = false;
3597 bool found_size = false;
3598 size_t i;
3599
3600 if (piov != NULL) {
3601 *piov = NULL;
3602 }
3603
3604 if (state->smb2.got_async) {
3605 return STATUS_PENDING;
3606 }
3607
3608 if (tevent_req_is_nterror(req, &status)) {
3609 for (i=0; i < num_expected; i++) {
3610 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3611 found_status = true;
3612 break;
3613 }
3614 }
3615
3616 if (found_status) {
3617 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3618 }
3619
3620 return status;
3621 }
3622
3623 if (num_expected == 0) {
3624 found_status = true;
3625 found_size = true;
3626 }
3627
3628 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3629 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3630
3631 for (i=0; i < num_expected; i++) {
3632 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3633 continue;
3634 }
3635
3636 found_status = true;
3637 if (expected[i].body_size == 0) {
3638 found_size = true;
3639 break;
3640 }
3641
3642 if (expected[i].body_size == body_size) {
3643 found_size = true;
3644 break;
3645 }
3646 }
3647
3648 if (!found_status) {
3649 return status;
3650 }
3651
3652 if (state->smb2.signing_skipped) {
3653 if (num_expected > 0) {
3654 return NT_STATUS_ACCESS_DENIED;
3655 }
3656 if (!NT_STATUS_IS_ERR(status)) {
3657 return NT_STATUS_ACCESS_DENIED;
3658 }
3659 }
3660
3661 if (!found_size) {
3662 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3663 }
3664
3665 if (piov != NULL) {
3666 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3667 }
3668
3669 return status;
3670 }
3671
3672 static const struct {
3673 enum protocol_types proto;
3674 const char *smb1_name;
3675 } smb1cli_prots[] = {
3676 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
3677 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
3678 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
3679 {PROTOCOL_LANMAN1, "LANMAN1.0"},
3680 {PROTOCOL_LANMAN2, "LM1.2X002"},
3681 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
3682 {PROTOCOL_LANMAN2, "LANMAN2.1"},
3683 {PROTOCOL_LANMAN2, "Samba"},
3684 {PROTOCOL_NT1, "NT LANMAN 1.0"},
3685 {PROTOCOL_NT1, "NT LM 0.12"},
3686 {PROTOCOL_SMB2_02, "SMB 2.002"},
3687 {PROTOCOL_SMB2_10, "SMB 2.???"},
3688 };
3689
3690 static const struct {
3691 enum protocol_types proto;
3692 uint16_t smb2_dialect;
3693 } smb2cli_prots[] = {
3694 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
3695 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
3696 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
3697 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
3698 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
3699 };
3700
3701 struct smbXcli_negprot_state {
3702 struct smbXcli_conn *conn;
3703 struct tevent_context *ev;
3704 uint32_t timeout_msec;
3705 enum protocol_types min_protocol;
3706 enum protocol_types max_protocol;
3707
3708 struct {
3709 uint8_t fixed[36];
3710 uint8_t dyn[ARRAY_SIZE(smb2cli_prots)*2];
3711 } smb2;
3712 };
3713
3714 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3715 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3716 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3717 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3718 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3719 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3720 TALLOC_CTX *frame,
3721 uint8_t *inbuf);
3722
3723 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3724 struct tevent_context *ev,
3725 struct smbXcli_conn *conn,
3726 uint32_t timeout_msec,
3727 enum protocol_types min_protocol,
3728 enum protocol_types max_protocol)
3729 {
3730 struct tevent_req *req, *subreq;
3731 struct smbXcli_negprot_state *state;
3732
3733 req = tevent_req_create(mem_ctx, &state,
3734 struct smbXcli_negprot_state);
3735 if (req == NULL) {
3736 return NULL;
3737 }
3738 state->conn = conn;
3739 state->ev = ev;
3740 state->timeout_msec = timeout_msec;
3741 state->min_protocol = min_protocol;
3742 state->max_protocol = max_protocol;
3743
3744 if (min_protocol == PROTOCOL_NONE) {
3745 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3746 return tevent_req_post(req, ev);
3747 }
3748
3749 if (max_protocol == PROTOCOL_NONE) {
3750 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3751 return tevent_req_post(req, ev);
3752 }
3753
3754 if (min_protocol > max_protocol) {
3755 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3756 return tevent_req_post(req, ev);
3757 }
3758
3759 if ((min_protocol < PROTOCOL_SMB2_02) &&
3760 (max_protocol < PROTOCOL_SMB2_02)) {
3761 /*
3762 * SMB1 only...
3763 */
3764 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3765
3766 subreq = smbXcli_negprot_smb1_subreq(state);
3767 if (tevent_req_nomem(subreq, req)) {
3768 return tevent_req_post(req, ev);
3769 }
3770 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3771 return req;
3772 }
3773
3774 if ((min_protocol >= PROTOCOL_SMB2_02) &&
3775 (max_protocol >= PROTOCOL_SMB2_02)) {
3776 /*
3777 * SMB2 only...
3778 */
3779 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3780
3781 subreq = smbXcli_negprot_smb2_subreq(state);
3782 if (tevent_req_nomem(subreq, req)) {
3783 return tevent_req_post(req, ev);
3784 }
3785 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3786 return req;
3787 }
3788
3789 /*
3790 * We send an SMB1 negprot with the SMB2 dialects
3791 * and expect a SMB1 or a SMB2 response.
3792 *
3793 * smbXcli_negprot_dispatch_incoming() will fix the
3794 * callback to match protocol of the response.
3795 */
3796 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
3797
3798 subreq = smbXcli_negprot_smb1_subreq(state);
3799 if (tevent_req_nomem(subreq, req)) {
3800 return tevent_req_post(req, ev);
3801 }
3802 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
3803 return req;
3804 }
3805
3806 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
3807 {
3808 struct tevent_req *req =
3809 tevent_req_callback_data(subreq,
3810 struct tevent_req);
3811 NTSTATUS status;
3812
3813 /*
3814 * we just want the low level error
3815 */
3816 status = tevent_req_simple_recv_ntstatus(subreq);
3817 TALLOC_FREE(subreq);
3818 if (tevent_req_nterror(req, status)) {
3819 return;
3820 }
3821
3822 /* this should never happen */
3823 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
3824 }
3825
3826 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
3827 {
3828 size_t i;
3829 DATA_BLOB bytes = data_blob_null;
3830 uint8_t flags;
3831 uint16_t flags2;
3832
3833 /* setup the protocol strings */
3834 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3835 uint8_t c = 2;
3836 bool ok;
3837
3838 if (smb1cli_prots[i].proto < state->min_protocol) {
3839 continue;
3840 }
3841
3842 if (smb1cli_prots[i].proto > state->max_protocol) {
3843 continue;
3844 }
3845
3846 ok = data_blob_append(state, &bytes, &c, sizeof(c));
3847 if (!ok) {
3848 return NULL;
3849 }
3850
3851 /*
3852 * We now it is already ascii and
3853 * we want NULL termination.
3854 */
3855 ok = data_blob_append(state, &bytes,
3856 smb1cli_prots[i].smb1_name,
3857 strlen(smb1cli_prots[i].smb1_name)+1);
3858 if (!ok) {
3859 return NULL;
3860 }
3861 }
3862
3863 smb1cli_req_flags(state->max_protocol,
3864 state->conn->smb1.client.capabilities,
3865 SMBnegprot,
3866 0, 0, &flags,
3867 0, 0, &flags2);
3868
3869 return smb1cli_req_send(state, state->ev, state->conn,
3870 SMBnegprot,
3871 flags, ~flags,
3872 flags2, ~flags2,
3873 state->timeout_msec,
3874 0xFFFE, 0, NULL, /* pid, tid, session */
3875 0, NULL, /* wct, vwv */
3876 bytes.length, bytes.data);
3877 }
3878
3879 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
3880 {
3881 struct tevent_req *req =
3882 tevent_req_callback_data(subreq,
3883 struct tevent_req);
3884 struct smbXcli_negprot_state *state =
3885 tevent_req_data(req,
3886 struct smbXcli_negprot_state);
3887 struct smbXcli_conn *conn = state->conn;
3888 struct iovec *recv_iov = NULL;
3889 uint8_t *inhdr;
3890 uint8_t wct;
3891 uint16_t *vwv;
3892 uint32_t num_bytes;
3893 uint8_t *bytes;
3894 NTSTATUS status;
3895 uint16_t protnum;
3896 size_t i;
3897 size_t num_prots = 0;
3898 uint8_t flags;
3899 uint32_t client_capabilities = conn->smb1.client.capabilities;
3900 uint32_t both_capabilities;
3901 uint32_t server_capabilities = 0;
3902 uint32_t capabilities;
3903 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
3904 uint32_t server_max_xmit = 0;
3905 uint32_t max_xmit;
3906 uint32_t server_max_mux = 0;
3907 uint16_t server_security_mode = 0;
3908 uint32_t server_session_key = 0;
3909 bool server_readbraw = false;
3910 bool server_writebraw = false;
3911 bool server_lockread = false;
3912 bool server_writeunlock = false;
3913 struct GUID server_guid = GUID_zero();
3914 DATA_BLOB server_gss_blob = data_blob_null;
3915 uint8_t server_challenge[8];
3916 char *server_workgroup = NULL;
3917 char *server_name = NULL;
3918 int server_time_zone = 0;
3919 NTTIME server_system_time = 0;
3920 static const struct smb1cli_req_expected_response expected[] = {
3921 {
3922 .status = NT_STATUS_OK,
3923 .wct = 0x11, /* NT1 */
3924 },
3925 {
3926 .status = NT_STATUS_OK,
3927 .wct = 0x0D, /* LM */
3928 },
3929 {
3930 .status = NT_STATUS_OK,
3931 .wct = 0x01, /* CORE */
3932 }
3933 };
3934
3935 ZERO_STRUCT(server_challenge);
3936
3937 status = smb1cli_req_recv(subreq, state,
3938 &recv_iov,
3939 &inhdr,
3940 &wct,
3941 &vwv,
3942 NULL, /* pvwv_offset */
3943 &num_bytes,
3944 &bytes,
3945 NULL, /* pbytes_offset */
3946 NULL, /* pinbuf */
3947 expected, ARRAY_SIZE(expected));
3948 TALLOC_FREE(subreq);
3949 if (tevent_req_nterror(req, status)) {
3950 return;
3951 }
3952
3953 flags = CVAL(inhdr, HDR_FLG);
3954
3955 protnum = SVAL(vwv, 0);
3956
3957 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3958 if (smb1cli_prots[i].proto < state->min_protocol) {
3959 continue;
3960 }
3961
3962 if (smb1cli_prots[i].proto > state->max_protocol) {
3963 continue;
3964 }
3965
3966 if (protnum != num_prots) {
3967 num_prots++;
3968 continue;
3969 }
3970
3971 conn->protocol = smb1cli_prots[i].proto;
3972 break;
3973 }
3974
3975 if (conn->protocol == PROTOCOL_NONE) {
3976 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3977 return;
3978 }
3979
3980 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
3981 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
3982 "and the selected protocol level doesn't support it.\n"));
3983 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3984 return;
3985 }
3986
3987 if (flags & FLAG_SUPPORT_LOCKREAD) {
3988 server_lockread = true;
3989 server_writeunlock = true;
3990 }
3991
3992 if (conn->protocol >= PROTOCOL_NT1) {
3993 const char *client_signing = NULL;
3994 bool server_mandatory = false;
3995 bool server_allowed = false;
3996 const char *server_signing = NULL;
3997 bool ok;
3998 uint8_t key_len;
3999
4000 if (wct != 0x11) {
4001 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4002 return;
4003 }
4004
4005 /* NT protocol */
4006 server_security_mode = CVAL(vwv + 1, 0);
4007 server_max_mux = SVAL(vwv + 1, 1);
4008 server_max_xmit = IVAL(vwv + 3, 1);
4009 server_session_key = IVAL(vwv + 7, 1);
4010 server_time_zone = SVALS(vwv + 15, 1);
4011 server_time_zone *= 60;
4012 /* this time arrives in real GMT */
4013 server_system_time = BVAL(vwv + 11, 1);
4014 server_capabilities = IVAL(vwv + 9, 1);
4015
4016 key_len = CVAL(vwv + 16, 1);
4017
4018 if (server_capabilities & CAP_RAW_MODE) {
4019 server_readbraw = true;
4020 server_writebraw = true;
4021 }
4022 if (server_capabilities & CAP_LOCK_AND_READ) {
4023 server_lockread = true;
4024 }
4025
4026 if (server_capabilities & CAP_EXTENDED_SECURITY) {
4027 DATA_BLOB blob1, blob2;
4028
4029 if (num_bytes < 16) {
4030 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4031 return;
4032 }
4033
4034 blob1 = data_blob_const(bytes, 16);
4035 status = GUID_from_data_blob(&blob1, &server_guid);
4036 if (tevent_req_nterror(req, status)) {
4037 return;
4038 }
4039
4040 blob1 = data_blob_const(bytes+16, num_bytes-16);
4041 blob2 = data_blob_dup_talloc(state, blob1);
4042 if (blob1.length > 0 &&
4043 tevent_req_nomem(blob2.data, req)) {
4044 return;
4045 }
4046 server_gss_blob = blob2;
4047 } else {
4048 DATA_BLOB blob1, blob2;
4049
4050 if (num_bytes < key_len) {
4051 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4052 return;
4053 }
4054
4055 if (key_len != 0 && key_len != 8) {
4056 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4057 return;
4058 }
4059
4060 if (key_len == 8) {
4061 memcpy(server_challenge, bytes, 8);
4062 }
4063
4064 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4065 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
4066 if (blob1.length > 0) {
4067 size_t len;
4068
4069 len = utf16_len_n(blob1.data,
4070 blob1.length);
4071 blob1.length = len;
4072
4073 ok = convert_string_talloc(state,
4074 CH_UTF16LE,
4075 CH_UNIX,
4076 blob1.data,
4077 blob1.length,
4078 &server_workgroup,
4079 &len);
4080 if (!ok) {
4081 status = map_nt_error_from_unix_common(errno);
4082 tevent_req_nterror(req, status);
4083 return;
4084 }
4085 }
4086
4087 blob2.data += blob1.length;
4088 blob2.length -= blob1.length;
4089 if (blob2.length > 0) {
4090 size_t len;
4091
4092 len = utf16_len_n(blob1.data,
4093 blob1.length);
4094 blob1.length = len;
4095
4096 ok = convert_string_talloc(state,
4097 CH_UTF16LE,
4098 CH_UNIX,
4099 blob2.data,
4100 blob2.length,
4101 &server_name,
4102 &len);
4103 if (!ok) {
4104 status = map_nt_error_from_unix_common(errno);
4105 tevent_req_nterror(req, status);
4106 return;
4107 }
4108 }
4109 }
4110
4111 client_signing = "disabled";
4112 if (conn->allow_signing) {
4113 client_signing = "allowed";
4114 }
4115 if (conn->mandatory_signing) {
4116 client_signing = "required";
4117 }
4118
4119 server_signing = "not supported";
4120 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4121 server_signing = "supported";
4122 server_allowed = true;
4123 } else if (conn->mandatory_signing) {
4124 /*
4125 * We have mandatory signing as client
4126 * lets assume the server will look at our
4127 * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4128 * flag in the session setup
4129 */
4130 server_signing = "not announced";
4131 server_allowed = true;
4132 }
4133 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4134 server_signing = "required";
4135 server_mandatory = true;
4136 }
4137
4138 ok = smb_signing_set_negotiated(conn->smb1.signing,
4139 server_allowed,
4140 server_mandatory);
4141 if (!ok) {
4142 DEBUG(1,("cli_negprot: SMB signing is required, "
4143 "but client[%s] and server[%s] mismatch\n",
4144 client_signing, server_signing));
4145 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4146 return;
4147 }
4148
4149 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4150 DATA_BLOB blob1;
4151 uint8_t key_len;
4152 time_t t;
4153
4154 if (wct != 0x0D) {
4155 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4156 return;
4157 }
4158
4159 server_security_mode = SVAL(vwv + 1, 0);
4160 server_max_xmit = SVAL(vwv + 2, 0);
4161 server_max_mux = SVAL(vwv + 3, 0);
4162 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4163 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4164 server_session_key = IVAL(vwv + 6, 0);
4165 server_time_zone = SVALS(vwv + 10, 0);
4166 server_time_zone *= 60;
4167 /* this time is converted to GMT by make_unix_date */
4168 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4169 unix_to_nt_time(&server_system_time, t);
4170 key_len = SVAL(vwv + 11, 0);
4171
4172 if (num_bytes < key_len) {
4173 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4174 return;
4175 }
4176
4177 if (key_len != 0 && key_len != 8) {
4178 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4179 return;
4180 }
4181
4182 if (key_len == 8) {
4183 memcpy(server_challenge, bytes, 8);
4184 }
4185
4186 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4187 if (blob1.length > 0) {
4188 size_t len;
4189 bool ok;
4190
4191 len = utf16_len_n(blob1.data,
4192 blob1.length);
4193 blob1.length = len;
4194
4195 ok = convert_string_talloc(state,
4196 CH_DOS,
4197 CH_UNIX,
4198 blob1.data,
4199 blob1.length,
4200 &server_workgroup,
4201 &len);
4202 if (!ok) {
4203 status = map_nt_error_from_unix_common(errno);
4204 tevent_req_nterror(req, status);
4205 return;
4206 }
4207 }
4208
4209 } else {
4210 /* the old core protocol */
4211 server_time_zone = get_time_zone(time(NULL));
4212 server_max_xmit = 1024;
4213 server_max_mux = 1;
4214 }
4215
4216 if (server_max_xmit < 1024) {
4217 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4218 return;
4219 }
4220
4221 if (server_max_mux < 1) {
4222 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4223 return;
4224 }
4225
4226 /*
4227 * Now calculate the negotiated capabilities
4228 * based on the mask for:
4229 * - client only flags
4230 * - flags used in both directions
4231 * - server only flags
4232 */
4233 both_capabilities = client_capabilities & server_capabilities;
4234 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4235 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4236 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4237
4238 max_xmit = MIN(client_max_xmit, server_max_xmit);
4239
4240 conn->smb1.server.capabilities = server_capabilities;
4241 conn->smb1.capabilities = capabilities;
4242
4243 conn->smb1.server.max_xmit = server_max_xmit;
4244 conn->smb1.max_xmit = max_xmit;
4245
4246 conn->smb1.server.max_mux = server_max_mux;
4247
4248 conn->smb1.server.security_mode = server_security_mode;
4249
4250 conn->smb1.server.readbraw = server_readbraw;
4251 conn->smb1.server.writebraw = server_writebraw;
4252 conn->smb1.server.lockread = server_lockread;
4253 conn->smb1.server.writeunlock = server_writeunlock;
4254
4255 conn->smb1.server.session_key = server_session_key;
4256
4257 talloc_steal(conn, server_gss_blob.data);
4258 conn->smb1.server.gss_blob = server_gss_blob;
4259 conn->smb1.server.guid = server_guid;
4260 memcpy(conn->smb1.server.challenge, server_challenge, 8);
4261 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4262 conn->smb1.server.name = talloc_move(conn, &server_name);
4263
4264 conn->smb1.server.time_zone = server_time_zone;
4265 conn->smb1.server.system_time = server_system_time;
4266
4267 tevent_req_done(req);
4268 }
4269
4270 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4271 {
4272 size_t i;
4273 uint8_t *buf;
4274 uint16_t dialect_count = 0;
4275
4276 buf = state->smb2.dyn;
4277 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4278 if (smb2cli_prots[i].proto < state->min_protocol) {
4279 continue;
4280 }
4281
4282 if (smb2cli_prots[i].proto > state->max_protocol) {
4283 continue;
4284 }
4285
4286 SSVAL(buf, dialect_count*2, smb2cli_prots[i].smb2_dialect);
4287 dialect_count++;
4288 }
4289
4290 buf = state->smb2.fixed;
4291 SSVAL(buf, 0, 36);
4292 SSVAL(buf, 2, dialect_count);
4293 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4294 SSVAL(buf, 6, 0); /* Reserved */
4295 if (state->max_protocol >= PROTOCOL_SMB2_22) {
4296 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4297 } else {
4298 SIVAL(buf, 8, 0); /* Capabilities */
4299 }
4300 if (state->max_protocol >= PROTOCOL_SMB2_10) {
4301 NTSTATUS status;
4302 DATA_BLOB blob;
4303
4304 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4305 state, &blob);
4306 if (!NT_STATUS_IS_OK(status)) {
4307 return NULL;
4308 }
4309 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4310 } else {
4311 memset(buf+12, 0, 16); /* ClientGuid */
4312 }
4313 SBVAL(buf, 28, 0); /* ClientStartTime */
4314
4315 return smb2cli_req_send(state, state->ev,
4316 state->conn, SMB2_OP_NEGPROT,
4317 0, 0, /* flags */
4318 state->timeout_msec,
4319 NULL, NULL, /* tcon, session */
4320 state->smb2.fixed, sizeof(state->smb2.fixed),
4321 state->smb2.dyn, dialect_count*2,
4322 UINT16_MAX); /* max_dyn_len */
4323 }
4324
4325 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4326 {
4327 struct tevent_req *req =
4328 tevent_req_callback_data(subreq,
4329 struct tevent_req);
4330 struct smbXcli_negprot_state *state =
4331 tevent_req_data(req,
4332 struct smbXcli_negprot_state);
4333 struct smbXcli_conn *conn = state->conn;
4334 size_t security_offset, security_length;
4335 DATA_BLOB blob;
4336 NTSTATUS status;
4337 struct iovec *iov;
4338 uint8_t *body;
4339 size_t i;
4340 uint16_t dialect_revision;
4341 static const struct smb2cli_req_expected_response expected[] = {
4342 {
4343 .status = NT_STATUS_OK,
4344 .body_size = 0x41
4345 }
4346 };
4347
4348 status = smb2cli_req_recv(subreq, state, &iov,
4349 expected, ARRAY_SIZE(expected));
4350 TALLOC_FREE(subreq);
4351 if (tevent_req_nterror(req, status)) {
4352 return;
4353 }
4354
4355 body = (uint8_t *)iov[1].iov_base;
4356
4357 dialect_revision = SVAL(body, 4);
4358
4359 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4360 if (smb2cli_prots[i].proto < state->min_protocol) {
4361 continue;
4362 }
4363
4364 if (smb2cli_prots[i].proto > state->max_protocol) {
4365 continue;
4366 }
4367
4368 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4369 continue;
4370 }
4371
4372 conn->protocol = smb2cli_prots[i].proto;
4373 break;
4374 }
4375
4376 if (conn->protocol == PROTOCOL_NONE) {
4377 if (state->min_protocol >= PROTOCOL_SMB2_02) {
4378 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4379 return;
4380 }
4381
4382 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4383 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4384 return;
4385 }
4386
4387 /* make sure we do not loop forever */
4388 state->min_protocol = PROTOCOL_SMB2_02;
4389
4390 /*
4391 * send a SMB2 negprot, in order to negotiate
4392 * the SMB2 dialect.
4393 */
4394 subreq = smbXcli_negprot_smb2_subreq(state);
4395 if (tevent_req_nomem(subreq, req)) {
4396 return;
4397 }
4398 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4399 return;
4400 }
4401
4402 conn->smb2.server.security_mode = SVAL(body, 2);
4403
4404 blob = data_blob_const(body + 8, 16);
4405 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4406 if (tevent_req_nterror(req, status)) {
4407 return;
4408 }
4409
4410 conn->smb2.server.capabilities = IVAL(body, 24);
4411 conn->smb2.server.max_trans_size= IVAL(body, 28);
4412 conn->smb2.server.max_read_size = IVAL(body, 32);
4413 conn->smb2.server.max_write_size= IVAL(body, 36);
4414 conn->smb2.server.system_time = BVAL(body, 40);
4415 conn->smb2.server.start_time = BVAL(body, 48);
4416
4417 security_offset = SVAL(body, 56);
4418 security_length = SVAL(body, 58);
4419
4420 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4421 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4422 return;
4423 }
4424
4425 if (security_length > iov[2].iov_len) {
4426 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4427 return;
4428 }
4429
4430 conn->smb2.server.gss_blob = data_blob_talloc(conn,
4431 iov[2].iov_base,
4432 security_length);
4433 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4434 return;
4435 }
4436
4437 tevent_req_done(req);
4438 }
4439
4440 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4441 TALLOC_CTX *tmp_mem,
4442 uint8_t *inbuf)
4443 {
4444 size_t num_pending = talloc_array_length(conn->pending);
4445 struct tevent_req *subreq;
4446 struct smbXcli_req_state *substate;
4447 struct tevent_req *req;
4448 uint32_t protocol_magic;
4449 size_t inbuf_len = smb_len_nbt(inbuf);
4450
4451 if (num_pending != 1) {
4452 return NT_STATUS_INTERNAL_ERROR;
4453 }
4454
4455 if (inbuf_len < 4) {
4456 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4457 }
4458
4459 subreq = conn->pending[0];
4460 substate = tevent_req_data(subreq, struct smbXcli_req_state);
4461 req = tevent_req_callback_data(subreq, struct tevent_req);
4462
4463 protocol_magic = IVAL(inbuf, 4);
4464
4465 switch (protocol_magic) {
4466 case SMB_MAGIC:
4467 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4468 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4469 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4470
4471 case SMB2_MAGIC:
4472 if (substate->smb2.recv_iov == NULL) {
4473 /*
4474 * For the SMB1 negprot we have move it.
4475 */
4476 substate->smb2.recv_iov = substate->smb1.recv_iov;
4477 substate->smb1.recv_iov = NULL;
4478 }
4479
4480 /*
4481 * we got an SMB2 answer, which consumed sequence number 0
4482 * so we need to use 1 as the next one.
4483 *
4484 * we also need to set the current credits to 0
4485 * as we consumed the initial one. The SMB2 answer
4486 * hopefully grant us a new credit.
4487 */
4488 conn->smb2.mid = 1;
4489 conn->smb2.cur_credits = 0;
4490 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4491 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4492 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4493 }
4494
4495 DEBUG(10, ("Got non-SMB PDU\n"));
4496 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4497 }
4498
4499 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
4500 {
4501 return tevent_req_simple_recv_ntstatus(req);
4502 }
4503
4504 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
4505 uint32_t timeout_msec,
4506 enum protocol_types min_protocol,
4507 enum protocol_types max_protocol)
4508 {
4509 TALLOC_CTX *frame = talloc_stackframe();
4510 struct tevent_context *ev;
4511 struct tevent_req *req;
4512 NTSTATUS status = NT_STATUS_NO_MEMORY;
4513 bool ok;
4514
4515 if (smbXcli_conn_has_async_calls(conn)) {
4516 /*
4517 * Can't use sync call while an async call is in flight
4518 */
4519 status = NT_STATUS_INVALID_PARAMETER_MIX;
4520 goto fail;
4521 }
4522 ev = samba_tevent_context_init(frame);
4523 if (ev == NULL) {
4524 goto fail;
4525 }
4526 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
4527 min_protocol, max_protocol);
4528 if (req == NULL) {
4529 goto fail;
4530 }
4531 ok = tevent_req_poll(req, ev);
4532 if (!ok) {
4533 status = map_nt_error_from_unix_common(errno);
4534 goto fail;
4535 }
4536 status = smbXcli_negprot_recv(req);
4537 fail:
4538 TALLOC_FREE(frame);
4539 return status;
4540 }
4541
4542 static int smbXcli_session_destructor(struct smbXcli_session *session)
4543 {
4544 if (session->conn == NULL) {
4545 return 0;
4546 }
4547
4548 DLIST_REMOVE(session->conn->sessions, session);
4549 return 0;
4550 }
4551
4552 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
4553 struct smbXcli_conn *conn)
4554 {
4555 struct smbXcli_session *session;
4556
4557 session = talloc_zero(mem_ctx, struct smbXcli_session);
4558 if (session == NULL) {
4559 return NULL;
4560 }
4561 session->smb2 = talloc_zero(session, struct smb2cli_session);
4562 if (session->smb2 == NULL) {
4563 talloc_free(session);
4564 return NULL;
4565 }
4566 talloc_set_destructor(session, smbXcli_session_destructor);
4567
4568 DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
4569 session->conn = conn;
4570
4571 return session;
4572 }
4573
4574 struct smbXcli_session *smbXcli_session_copy(TALLOC_CTX *mem_ctx,
4575 struct smbXcli_session *src)
4576 {
4577 struct smbXcli_session *session;
4578
4579 session = talloc_zero(mem_ctx, struct smbXcli_session);
4580 if (session == NULL) {
4581 return NULL;
4582 }
4583 session->smb2 = talloc_zero(session, struct smb2cli_session);
4584 if (session->smb2 == NULL) {
4585 talloc_free(session);
4586 return NULL;
4587 }
4588
4589 session->conn = src->conn;
4590 *session->smb2 = *src->smb2;
4591 session->smb2_channel = src->smb2_channel;
4592 session->disconnect_expired = src->disconnect_expired;
4593
4594 DLIST_ADD_END(src->conn->sessions, session, struct smbXcli_session *);
4595 talloc_set_destructor(session, smbXcli_session_destructor);
4596
4597 return session;
4598 }
4599
4600
4601 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
4602 TALLOC_CTX *mem_ctx,
4603 DATA_BLOB *key)
4604 {
4605 const DATA_BLOB *application_key;
4606
4607 *key = data_blob_null;
4608
4609 if (session->conn == NULL) {
4610 return NT_STATUS_NO_USER_SESSION_KEY;
4611 }
4612
4613 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
4614 application_key = &session->smb2->application_key;
4615 } else {
4616 application_key = &session->smb1.application_key;
4617 }
4618
4619 if (application_key->length == 0) {
4620 return NT_STATUS_NO_USER_SESSION_KEY;
4621 }
4622
4623 *key = data_blob_dup_talloc(mem_ctx, *application_key);
4624 if (key->data == NULL) {
4625 return NT_STATUS_NO_MEMORY;
4626 }
4627
4628 return NT_STATUS_OK;
4629 }
4630
4631 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
4632 {
4633 session->disconnect_expired = true;
4634 }
4635
4636 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
4637 {
4638 return session->smb1.session_id;
4639 }
4640
4641 void smb1cli_session_set_id(struct smbXcli_session *session,
4642 uint16_t session_id)
4643 {
4644 session->smb1.session_id = session_id;
4645 }
4646
4647 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
4648 const DATA_BLOB _session_key)
4649 {
4650 struct smbXcli_conn *conn = session->conn;
4651 uint8_t session_key[16];
4652
4653 if (conn == NULL) {
4654 return NT_STATUS_INVALID_PARAMETER_MIX;
4655 }
4656
4657 if (session->smb1.application_key.length != 0) {
4658 /*
4659 * TODO: do not allow this...
4660 *
4661 * return NT_STATUS_INVALID_PARAMETER_MIX;
4662 */
4663 data_blob_clear_free(&session->smb1.application_key);
4664 session->smb1.protected_key = false;
4665 }
4666
4667 if (_session_key.length == 0) {
4668 return NT_STATUS_OK;
4669 }
4670
4671 ZERO_STRUCT(session_key);
4672 memcpy(session_key, _session_key.data,
4673 MIN(_session_key.length, sizeof(session_key)));
4674
4675 session->smb1.application_key = data_blob_talloc(session,
4676 session_key,
4677 sizeof(session_key));
4678 ZERO_STRUCT(session_key);
4679 if (session->smb1.application_key.data == NULL) {
4680 return NT_STATUS_NO_MEMORY;
4681 }
4682
4683 session->smb1.protected_key = false;
4684
4685 return NT_STATUS_OK;
4686 }
4687
4688 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
4689 {
4690 if (session->smb1.protected_key) {
4691 /* already protected */
4692 return NT_STATUS_OK;
4693 }
4694
4695 if (session->smb1.application_key.length != 16) {
4696 return NT_STATUS_INVALID_PARAMETER_MIX;
4697 }
4698
4699 smb_key_derivation(session->smb1.application_key.data,
4700 session->smb1.application_key.length,
4701 session->smb1.application_key.data);
4702
4703 session->smb1.protected_key = true;
4704
4705 return NT_STATUS_OK;
4706 }
4707
4708 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
4709 {
4710 struct smbXcli_conn *conn = session->conn;
4711 uint8_t security_mode = 0;
4712
4713 if (conn == NULL) {
4714 return security_mode;
4715 }
4716
4717 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
4718 if (conn->mandatory_signing) {
4719 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
4720 }
4721
4722 return security_mode;
4723 }
4724
4725 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
4726 {
4727 return session->smb2->session_id;
4728 }
4729
4730 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
4731 {
4732 return session->smb2->session_flags;
4733 }
4734
4735 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
4736 uint64_t session_id,
4737 uint16_t session_flags)
4738 {
4739 session->smb2->session_id = session_id;
4740 session->smb2->session_flags = session_flags;
4741 }
4742
4743 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
4744 {
4745 session->smb2->channel_sequence += 1;
4746 }
4747
4748 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
4749 const DATA_BLOB _session_key,
4750 const struct iovec *recv_iov)
4751 {
4752 struct smbXcli_conn *conn = session->conn;
4753 uint16_t no_sign_flags;
4754 uint8_t session_key[16];
4755 bool check_signature = true;
4756 uint32_t hdr_flags;
4757 NTSTATUS status;
4758
4759 if (conn == NULL) {
4760 return NT_STATUS_INVALID_PARAMETER_MIX;
4761 }
4762
4763 if (recv_iov[0].iov_len != SMB2_HDR_BODY) {
4764 return NT_STATUS_INVALID_PARAMETER_MIX;
4765 }
4766
4767 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
4768
4769 if (session->smb2->session_flags & no_sign_flags) {
4770 session->smb2->should_sign = false;
4771 return NT_STATUS_OK;
4772 }
4773
4774 if (session->smb2->signing_key.length != 0) {
4775 return NT_STATUS_INVALID_PARAMETER_MIX;
4776 }
4777
4778 ZERO_STRUCT(session_key);
4779 memcpy(session_key, _session_key.data,
4780 MIN(_session_key.length, sizeof(session_key)));
4781
4782 session->smb2->signing_key = data_blob_talloc(session,
4783 session_key,
4784 sizeof(session_key));
4785 if (session->smb2->signing_key.data == NULL) {
4786 ZERO_STRUCT(session_key);
4787 return NT_STATUS_NO_MEMORY;
4788 }
4789
4790 if (conn->protocol >= PROTOCOL_SMB2_24) {
4791 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4792 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4793
4794 smb2_key_derivation(session_key, sizeof(session_key),
4795 label.data, label.length,
4796 context.data, context.length,
4797 session->smb2->signing_key.data);
4798 }
4799
4800 session->smb2->encryption_key = data_blob_dup_talloc(session,
4801 session->smb2->signing_key);
4802 if (session->smb2->encryption_key.data == NULL) {
4803 ZERO_STRUCT(session_key);
4804 return NT_STATUS_NO_MEMORY;
4805 }
4806
4807 if (conn->protocol >= PROTOCOL_SMB2_24) {
4808 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4809 const DATA_BLOB context = data_blob_string_const_null("ServerIn ");
4810
4811 smb2_key_derivation(session_key, sizeof(session_key),
4812 label.data, label.length,
4813 context.data, context.length,
4814 session->smb2->encryption_key.data);
4815 }
4816
4817 session->smb2->decryption_key = data_blob_dup_talloc(session,
4818 session->smb2->signing_key);
4819 if (session->smb2->decryption_key.data == NULL) {
4820 ZERO_STRUCT(session_key);
4821 return NT_STATUS_NO_MEMORY;
4822 }
4823
4824 if (conn->protocol >= PROTOCOL_SMB2_24) {
4825 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4826 const DATA_BLOB context = data_blob_string_const_null("ServerOut");
4827
4828 smb2_key_derivation(session_key, sizeof(session_key),
4829 label.data, label.length,
4830 context.data, context.length,
4831 session->smb2->decryption_key.data);
4832 }
4833
4834 session->smb2->application_key = data_blob_dup_talloc(session,
4835 session->smb2->signing_key);
4836 if (session->smb2->application_key.data == NULL) {
4837 ZERO_STRUCT(session_key);
4838 return NT_STATUS_NO_MEMORY;
4839 }
4840
4841 if (conn->protocol >= PROTOCOL_SMB2_24) {
4842 const DATA_BLOB label = data_blob_string_const_null("SMB2APP");
4843 const DATA_BLOB context = data_blob_string_const_null("SmbRpc");
4844
4845 smb2_key_derivation(session_key, sizeof(session_key),
4846 label.data, label.length,
4847 context.data, context.length,
4848 session->smb2->application_key.data);
4849 }
4850 ZERO_STRUCT(session_key);
4851
4852 session->smb2_channel.signing_key = data_blob_dup_talloc(session,
4853 session->smb2->signing_key);
4854 if (session->smb2_channel.signing_key.data == NULL) {
4855 return NT_STATUS_NO_MEMORY;
4856 }
4857
4858 check_signature = conn->mandatory_signing;
4859
4860 hdr_flags = IVAL(recv_iov[0].iov_base, SMB2_HDR_FLAGS);
4861 if (hdr_flags & SMB2_HDR_FLAG_SIGNED) {
4862 /*
4863 * Sadly some vendors don't sign the
4864 * final SMB2 session setup response
4865 *
4866 * At least Windows and Samba are always doing this
4867 * if there's a session key available.
4868 *
4869 * We only check the signature if it's mandatory
4870 * or SMB2_HDR_FLAG_SIGNED is provided.
4871 */
4872 check_signature = true;
4873 }
4874
4875 if (check_signature) {
4876 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4877 session->conn->protocol,
4878 recv_iov, 3);
4879 if (!NT_STATUS_IS_OK(status)) {
4880 return status;
4881 }
4882 }
4883
4884 session->smb2->should_sign = false;
4885 session->smb2->should_encrypt = false;
4886
4887 if (conn->desire_signing) {
4888 session->smb2->should_sign = true;
4889 }
4890
4891 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
4892 session->smb2->should_sign = true;
4893 }
4894
4895 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
4896 session->smb2->should_encrypt = true;
4897 }
4898
4899 if (conn->protocol < PROTOCOL_SMB2_24) {
4900 session->smb2->should_encrypt = false;
4901 }
4902
4903 if (!(conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
4904 session->smb2->should_encrypt = false;
4905 }
4906
4907 generate_random_buffer((uint8_t *)&session->smb2->nonce_high,
4908 sizeof(session->smb2->nonce_high));
4909 session->smb2->nonce_low = 1;
4910
4911 return NT_STATUS_OK;
4912 }
4913
4914 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
4915 struct smbXcli_session *session1,
4916 struct smbXcli_conn *conn,
4917 struct smbXcli_session **_session2)
4918 {
4919 struct smbXcli_session *session2;
4920
4921 if (session1->smb2->signing_key.length == 0) {
4922 return NT_STATUS_INVALID_PARAMETER_MIX;
4923 }
4924
4925 if (conn == NULL) {
4926 return NT_STATUS_INVALID_PARAMETER_MIX;
4927 }
4928
4929 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
4930 if (session2 == NULL) {
4931 return NT_STATUS_NO_MEMORY;
4932 }
4933 session2->smb2 = talloc_reference(session2, session1->smb2);
4934 if (session2->smb2 == NULL) {
4935 talloc_free(session2);
4936 return NT_STATUS_NO_MEMORY;
4937 }
4938
4939 talloc_set_destructor(session2, smbXcli_session_destructor);
4940 DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
4941 session2->conn = conn;
4942
4943 *_session2 = session2;
4944 return NT_STATUS_OK;
4945 }
4946
4947 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
4948 const DATA_BLOB _channel_key,
4949 const struct iovec *recv_iov)
4950 {
4951 struct smbXcli_conn *conn = session->conn;
4952 uint8_t channel_key[16];
4953 NTSTATUS status;
4954
4955 if (conn == NULL) {
4956 return NT_STATUS_INVALID_PARAMETER_MIX;
4957 }
4958
4959 if (session->smb2_channel.signing_key.length != 0) {
4960 return NT_STATUS_INVALID_PARAMETER_MIX;
4961 }
4962
4963 ZERO_STRUCT(channel_key);
4964 memcpy(channel_key, _channel_key.data,
4965 MIN(_channel_key.length, sizeof(channel_key)));
4966
4967 session->smb2_channel.signing_key = data_blob_talloc(session,
4968 channel_key,
4969 sizeof(channel_key));
4970 if (session->smb2_channel.signing_key.data == NULL) {
4971 ZERO_STRUCT(channel_key);
4972 return NT_STATUS_NO_MEMORY;
4973 }
4974
4975 if (conn->protocol >= PROTOCOL_SMB2_24) {
4976 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4977 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4978
4979 smb2_key_derivation(channel_key, sizeof(channel_key),
4980 label.data, label.length,
4981 context.data, context.length,
4982 session->smb2_channel.signing_key.data);
4983 }
4984 ZERO_STRUCT(channel_key);
4985
4986 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4987 session->conn->protocol,
4988 recv_iov, 3);
4989 if (!NT_STATUS_IS_OK(status)) {
4990 return status;
4991 }
4992
4993 return NT_STATUS_OK;
4994 }
4995
4996 NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
4997 {
4998 if (session->smb2->should_encrypt) {
4999 return NT_STATUS_OK;
5000 }
5001
5002 if (session->conn->protocol < PROTOCOL_SMB2_24) {
5003 return NT_STATUS_NOT_SUPPORTED;
5004 }
5005
5006 if (!(session->conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
5007 return NT_STATUS_NOT_SUPPORTED;
5008 }
5009
5010 if (session->smb2->signing_key.data == NULL) {
5011 return NT_STATUS_NOT_SUPPORTED;
5012 }
5013 session->smb2->should_encrypt = true;
5014 return NT_STATUS_OK;
5015 }
5016
5017 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
5018 {
5019 struct smbXcli_tcon *tcon;
5020
5021 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
5022 if (tcon == NULL) {
5023 return NULL;
5024 }
5025
5026 return tcon;
5027 }
5028
5029 void smbXcli_tcon_set_fs_attributes(struct smbXcli_tcon *tcon,
5030 uint32_t fs_attributes)
5031 {
5032 tcon->fs_attributes = fs_attributes;
5033 }
5034
5035 uint32_t smbXcli_tcon_get_fs_attributes(struct smbXcli_tcon *tcon)
5036 {
5037 return tcon->fs_attributes;
5038 }
5039
5040 bool smbXcli_tcon_is_dfs_share(struct smbXcli_tcon *tcon)
5041 {
5042 if (tcon == NULL) {
5043 return false;
5044 }
5045
5046 if (tcon->is_smb1) {
5047 if (tcon->smb1.optional_support & SMB_SHARE_IN_DFS) {
5048 return true;
5049 }
5050
5051 return false;
5052 }
5053
5054 if (tcon->smb2.capabilities & SMB2_SHARE_CAP_DFS) {
5055 return true;
5056 }
5057
5058 return false;
5059 }
5060
5061 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
5062 {
5063 return tcon->smb1.tcon_id;
5064 }
5065
5066 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
5067 {
5068 tcon->is_smb1 = true;
5069 tcon->smb1.tcon_id = tcon_id;
5070 }
5071
5072 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
5073 uint16_t tcon_id,
5074 uint16_t optional_support,
5075 uint32_t maximal_access,
5076 uint32_t guest_maximal_access,
5077 const char *service,
5078 const char *fs_type)
5079 {
5080 tcon->is_smb1 = true;
5081 tcon->fs_attributes = 0;
5082 tcon->smb1.tcon_id = tcon_id;
5083 tcon->smb1.optional_support = optional_support;
5084 tcon->smb1.maximal_access = maximal_access;
5085 tcon->smb1.guest_maximal_access = guest_maximal_access;
5086
5087 TALLOC_FREE(tcon->smb1.service);
5088 tcon->smb1.service = talloc_strdup(tcon, service);
5089 if (service != NULL && tcon->smb1.service == NULL) {
5090 return false;
5091 }
5092
5093 TALLOC_FREE(tcon->smb1.fs_type);
5094 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
5095 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
5096 return false;
5097 }
5098
5099 return true;
5100 }
5101
5102 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
5103 {
5104 return tcon->smb2.tcon_id;
5105 }
5106
5107 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
5108 {
5109 return tcon->smb2.capabilities;
5110 }
5111
5112 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
5113 struct smbXcli_session *session,
5114 uint32_t tcon_id,
5115 uint8_t type,
5116 uint32_t flags,
5117 uint32_t capabilities,
5118 uint32_t maximal_access)
5119 {
5120 tcon->is_smb1 = false;
5121 tcon->fs_attributes = 0;
5122 tcon->smb2.tcon_id = tcon_id;
5123 tcon->smb2.type = type;
5124 tcon->smb2.flags = flags;
5125 tcon->smb2.capabilities = capabilities;
5126 tcon->smb2.maximal_access = maximal_access;
5127
5128 tcon->smb2.should_encrypt = false;
5129
5130 if (session == NULL) {
5131 return;
5132 }
5133
5134 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
5135
5136 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
5137 tcon->smb2.should_encrypt = true;
5138 }
5139 }
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