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libcli/smb: Introduce smbXcli_conn_dfs_supported
[Samba.git] / libcli / smb / smbXcli_base.c
blobf1ac0d53964550f66f330493c32472e1a3787b2b
1 /*
2 Unix SMB/CIFS implementation.
3 Infrastructure for async SMB client requests
4 Copyright (C) Volker Lendecke 2008
5 Copyright (C) Stefan Metzmacher 2011
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "includes.h"
22 #include "system/network.h"
23 #include "../lib/async_req/async_sock.h"
24 #include "../lib/util/tevent_ntstatus.h"
25 #include "../lib/util/tevent_unix.h"
26 #include "lib/util/util_net.h"
27 #include "lib/util/dlinklist.h"
28 #include "../libcli/smb/smb_common.h"
29 #include "../libcli/smb/smb_seal.h"
30 #include "../libcli/smb/smb_signing.h"
31 #include "../libcli/smb/read_smb.h"
32 #include "smbXcli_base.h"
33 #include "librpc/ndr/libndr.h"
34
35 struct smbXcli_conn;
36 struct smbXcli_req;
37 struct smbXcli_session;
38 struct smbXcli_tcon;
39
40 struct smbXcli_conn {
41 int read_fd;
42 int write_fd;
43 struct sockaddr_storage local_ss;
44 struct sockaddr_storage remote_ss;
45 const char *remote_name;
46
47 struct tevent_queue *outgoing;
48 struct tevent_req **pending;
49 struct tevent_req *read_smb_req;
50
51 enum protocol_types protocol;
52 bool allow_signing;
53 bool desire_signing;
54 bool mandatory_signing;
55
56 /*
57 * The incoming dispatch function should return:
58 * - NT_STATUS_RETRY, if more incoming PDUs are expected.
59 * - NT_STATUS_OK, if no more processing is desired, e.g.
60 * the dispatch function called
61 * tevent_req_done().
62 * - All other return values disconnect the connection.
63 */
64 NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
65 TALLOC_CTX *tmp_mem,
66 uint8_t *inbuf);
67
68 struct {
69 struct {
70 uint32_t capabilities;
71 uint32_t max_xmit;
72 } client;
73
74 struct {
75 uint32_t capabilities;
76 uint32_t max_xmit;
77 uint16_t max_mux;
78 uint16_t security_mode;
79 bool readbraw;
80 bool writebraw;
81 bool lockread;
82 bool writeunlock;
83 uint32_t session_key;
84 struct GUID guid;
85 DATA_BLOB gss_blob;
86 uint8_t challenge[8];
87 const char *workgroup;
88 const char *name;
89 int time_zone;
90 NTTIME system_time;
91 } server;
92
93 uint32_t capabilities;
94 uint32_t max_xmit;
95
96 uint16_t mid;
97
98 struct smb_signing_state *signing;
99 struct smb_trans_enc_state *trans_enc;
100
101 struct tevent_req *read_braw_req;
102 } smb1;
103
104 struct {
105 struct {
106 uint32_t capabilities;
107 uint16_t security_mode;
108 struct GUID guid;
109 } client;
110
111 struct {
112 uint32_t capabilities;
113 uint16_t security_mode;
114 struct GUID guid;
115 uint32_t max_trans_size;
116 uint32_t max_read_size;
117 uint32_t max_write_size;
118 NTTIME system_time;
119 NTTIME start_time;
120 DATA_BLOB gss_blob;
121 } server;
122
123 uint64_t mid;
124 uint16_t cur_credits;
125 uint16_t max_credits;
126 } smb2;
127
128 struct smbXcli_session *sessions;
129 };
130
131 struct smb2cli_session {
132 uint64_t session_id;
133 uint16_t session_flags;
134 DATA_BLOB application_key;
135 DATA_BLOB signing_key;
136 bool should_sign;
137 bool should_encrypt;
138 DATA_BLOB encryption_key;
139 DATA_BLOB decryption_key;
140 uint64_t nonce_high;
141 uint64_t nonce_low;
142 uint16_t channel_sequence;
143 };
144
145 struct smbXcli_session {
146 struct smbXcli_session *prev, *next;
147 struct smbXcli_conn *conn;
148
149 struct {
150 uint16_t session_id;
151 DATA_BLOB application_key;
152 bool protected_key;
153 } smb1;
154
155 struct smb2cli_session *smb2;
156
157 struct {
158 DATA_BLOB signing_key;
159 } smb2_channel;
160
161 /*
162 * this should be a short term hack
163 * until the upper layers have implemented
164 * re-authentication.
165 */
166 bool disconnect_expired;
167 };
168
169 struct smbXcli_tcon {
170 struct {
171 uint16_t tcon_id;
172 uint16_t optional_support;
173 uint32_t maximal_access;
174 uint32_t guest_maximal_access;
175 char *service;
176 char *fs_type;
177 } smb1;
178
179 struct {
180 uint32_t tcon_id;
181 uint8_t type;
182 uint32_t flags;
183 uint32_t capabilities;
184 uint32_t maximal_access;
185 bool should_encrypt;
186 } smb2;
187 };
188
189 struct smbXcli_req_state {
190 struct tevent_context *ev;
191 struct smbXcli_conn *conn;
192 struct smbXcli_session *session; /* maybe NULL */
193 struct smbXcli_tcon *tcon; /* maybe NULL */
194
195 uint8_t length_hdr[4];
196
197 bool one_way;
198
199 uint8_t *inbuf;
200
201 struct {
202 /* Space for the header including the wct */
203 uint8_t hdr[HDR_VWV];
204
205 /*
206 * For normal requests, smb1cli_req_send chooses a mid.
207 * SecondaryV trans requests need to use the mid of the primary
208 * request, so we need a place to store it.
209 * Assume it is set if != 0.
210 */
211 uint16_t mid;
212
213 uint16_t *vwv;
214 uint8_t bytecount_buf[2];
215
216 #define MAX_SMB_IOV 10
217 /* length_hdr, hdr, words, byte_count, buffers */
218 struct iovec iov[1 + 3 + MAX_SMB_IOV];
219 int iov_count;
220
221 bool one_way_seqnum;
222 uint32_t seqnum;
223 struct tevent_req **chained_requests;
224
225 uint8_t recv_cmd;
226 NTSTATUS recv_status;
227 /* always an array of 3 talloc elements */
228 struct iovec *recv_iov;
229 } smb1;
230
231 struct {
232 const uint8_t *fixed;
233 uint16_t fixed_len;
234 const uint8_t *dyn;
235 uint32_t dyn_len;
236
237 uint8_t transform[SMB2_TF_HDR_SIZE];
238 uint8_t hdr[SMB2_HDR_BODY];
239 uint8_t pad[7]; /* padding space for compounding */
240
241 /*
242 * always an array of 3 talloc elements
243 * (without a SMB2_TRANSFORM header!)
244 *
245 * HDR, BODY, DYN
246 */
247 struct iovec *recv_iov;
248
249 /*
250 * the expected max for the response dyn_len
251 */
252 uint32_t max_dyn_len;
253
254 uint16_t credit_charge;
255
256 bool should_sign;
257 bool should_encrypt;
258 uint64_t encryption_session_id;
259
260 bool signing_skipped;
261 bool notify_async;
262 bool got_async;
263 } smb2;
264 };
265
266 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
267 {
268 /*
269 * NT_STATUS_OK, means we do not notify the callers
270 */
271 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
272
273 while (conn->sessions) {
274 conn->sessions->conn = NULL;
275 DLIST_REMOVE(conn->sessions, conn->sessions);
276 }
277
278 if (conn->smb1.trans_enc) {
279 TALLOC_FREE(conn->smb1.trans_enc);
280 }
281
282 return 0;
283 }
284
285 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
286 int fd,
287 const char *remote_name,
288 enum smb_signing_setting signing_state,
289 uint32_t smb1_capabilities,
290 struct GUID *client_guid,
291 uint32_t smb2_capabilities)
292 {
293 struct smbXcli_conn *conn = NULL;
294 void *ss = NULL;
295 struct sockaddr *sa = NULL;
296 socklen_t sa_length;
297 int ret;
298
299 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
300 if (!conn) {
301 return NULL;
302 }
303
304 conn->read_fd = fd;
305 conn->write_fd = dup(fd);
306 if (conn->write_fd == -1) {
307 goto error;
308 }
309
310 conn->remote_name = talloc_strdup(conn, remote_name);
311 if (conn->remote_name == NULL) {
312 goto error;
313 }
314
315
316 ss = (void *)&conn->local_ss;
317 sa = (struct sockaddr *)ss;
318 sa_length = sizeof(conn->local_ss);
319 ret = getsockname(fd, sa, &sa_length);
320 if (ret == -1) {
321 goto error;
322 }
323 ss = (void *)&conn->remote_ss;
324 sa = (struct sockaddr *)ss;
325 sa_length = sizeof(conn->remote_ss);
326 ret = getpeername(fd, sa, &sa_length);
327 if (ret == -1) {
328 goto error;
329 }
330
331 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
332 if (conn->outgoing == NULL) {
333 goto error;
334 }
335 conn->pending = NULL;
336
337 conn->protocol = PROTOCOL_NONE;
338
339 switch (signing_state) {
340 case SMB_SIGNING_OFF:
341 /* never */
342 conn->allow_signing = false;
343 conn->desire_signing = false;
344 conn->mandatory_signing = false;
345 break;
346 case SMB_SIGNING_DEFAULT:
347 case SMB_SIGNING_IF_REQUIRED:
348 /* if the server requires it */
349 conn->allow_signing = true;
350 conn->desire_signing = false;
351 conn->mandatory_signing = false;
352 break;
353 case SMB_SIGNING_REQUIRED:
354 /* always */
355 conn->allow_signing = true;
356 conn->desire_signing = true;
357 conn->mandatory_signing = true;
358 break;
359 }
360
361 conn->smb1.client.capabilities = smb1_capabilities;
362 conn->smb1.client.max_xmit = UINT16_MAX;
363
364 conn->smb1.capabilities = conn->smb1.client.capabilities;
365 conn->smb1.max_xmit = 1024;
366
367 conn->smb1.mid = 1;
368
369 /* initialise signing */
370 conn->smb1.signing = smb_signing_init(conn,
371 conn->allow_signing,
372 conn->desire_signing,
373 conn->mandatory_signing);
374 if (!conn->smb1.signing) {
375 goto error;
376 }
377
378 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
379 if (conn->mandatory_signing) {
380 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
381 }
382 if (client_guid) {
383 conn->smb2.client.guid = *client_guid;
384 }
385 conn->smb2.client.capabilities = smb2_capabilities;
386
387 conn->smb2.cur_credits = 1;
388 conn->smb2.max_credits = 0;
389
390 talloc_set_destructor(conn, smbXcli_conn_destructor);
391 return conn;
392
393 error:
394 if (conn->write_fd != -1) {
395 close(conn->write_fd);
396 }
397 TALLOC_FREE(conn);
398 return NULL;
399 }
400
401 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
402 {
403 if (conn == NULL) {
404 return false;
405 }
406
407 if (conn->read_fd == -1) {
408 return false;
409 }
410
411 return true;
412 }
413
414 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
415 {
416 return conn->protocol;
417 }
418
419 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
420 {
421 if (conn->protocol >= PROTOCOL_SMB2_02) {
422 return true;
423 }
424
425 if (conn->smb1.capabilities & CAP_UNICODE) {
426 return true;
427 }
428
429 return false;
430 }
431
432 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
433 {
434 set_socket_options(conn->read_fd, options);
435 }
436
437 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
438 {
439 return &conn->local_ss;
440 }
441
442 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
443 {
444 return &conn->remote_ss;
445 }
446
447 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
448 {
449 return conn->remote_name;
450 }
451
452 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
453 {
454 if (conn->protocol >= PROTOCOL_SMB2_02) {
455 /*
456 * TODO...
457 */
458 return 1;
459 }
460
461 return conn->smb1.server.max_mux;
462 }
463
464 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
465 {
466 if (conn->protocol >= PROTOCOL_SMB2_02) {
467 return conn->smb2.server.system_time;
468 }
469
470 return conn->smb1.server.system_time;
471 }
472
473 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
474 {
475 if (conn->protocol >= PROTOCOL_SMB2_02) {
476 return &conn->smb2.server.gss_blob;
477 }
478
479 return &conn->smb1.server.gss_blob;
480 }
481
482 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
483 {
484 if (conn->protocol >= PROTOCOL_SMB2_02) {
485 return &conn->smb2.server.guid;
486 }
487
488 return &conn->smb1.server.guid;
489 }
490
491 struct smbXcli_conn_samba_suicide_state {
492 struct smbXcli_conn *conn;
493 struct iovec iov;
494 uint8_t buf[9];
495 };
496
497 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
498
499 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
500 struct tevent_context *ev,
501 struct smbXcli_conn *conn,
502 uint8_t exitcode)
503 {
504 struct tevent_req *req, *subreq;
505 struct smbXcli_conn_samba_suicide_state *state;
506
507 req = tevent_req_create(mem_ctx, &state,
508 struct smbXcli_conn_samba_suicide_state);
509 if (req == NULL) {
510 return NULL;
511 }
512 state->conn = conn;
513 SIVAL(state->buf, 4, 0x74697865);
514 SCVAL(state->buf, 8, exitcode);
515 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
516
517 state->iov.iov_base = state->buf;
518 state->iov.iov_len = sizeof(state->buf);
519
520 subreq = writev_send(state, ev, conn->outgoing, conn->write_fd,
521 false, &state->iov, 1);
522 if (tevent_req_nomem(subreq, req)) {
523 return tevent_req_post(req, ev);
524 }
525 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
526 return req;
527 }
528
529 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
530 {
531 struct tevent_req *req = tevent_req_callback_data(
532 subreq, struct tevent_req);
533 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
534 req, struct smbXcli_conn_samba_suicide_state);
535 ssize_t nwritten;
536 int err;
537
538 nwritten = writev_recv(subreq, &err);
539 TALLOC_FREE(subreq);
540 if (nwritten == -1) {
541 NTSTATUS status = map_nt_error_from_unix_common(err);
542 smbXcli_conn_disconnect(state->conn, status);
543 return;
544 }
545 tevent_req_done(req);
546 }
547
548 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
549 {
550 return tevent_req_simple_recv_ntstatus(req);
551 }
552
553 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
554 uint8_t exitcode)
555 {
556 TALLOC_CTX *frame = talloc_stackframe();
557 struct tevent_context *ev;
558 struct tevent_req *req;
559 NTSTATUS status = NT_STATUS_NO_MEMORY;
560 bool ok;
561
562 if (smbXcli_conn_has_async_calls(conn)) {
563 /*
564 * Can't use sync call while an async call is in flight
565 */
566 status = NT_STATUS_INVALID_PARAMETER_MIX;
567 goto fail;
568 }
569 ev = samba_tevent_context_init(frame);
570 if (ev == NULL) {
571 goto fail;
572 }
573 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
574 if (req == NULL) {
575 goto fail;
576 }
577 ok = tevent_req_poll(req, ev);
578 if (!ok) {
579 status = map_nt_error_from_unix_common(errno);
580 goto fail;
581 }
582 status = smbXcli_conn_samba_suicide_recv(req);
583 fail:
584 TALLOC_FREE(frame);
585 return status;
586 }
587
588 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
589 {
590 return conn->smb1.capabilities;
591 }
592
593 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
594 {
595 return conn->smb1.max_xmit;
596 }
597
598 bool smb1cli_conn_req_possible(struct smbXcli_conn *conn)
599 {
600 size_t pending;
601 uint16_t possible = conn->smb1.server.max_mux;
602
603 pending = tevent_queue_length(conn->outgoing);
604 if (pending >= possible) {
605 return false;
606 }
607 pending += talloc_array_length(conn->pending);
608 if (pending >= possible) {
609 return false;
610 }
611
612 return true;
613 }
614
615 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
616 {
617 return conn->smb1.server.session_key;
618 }
619
620 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
621 {
622 return conn->smb1.server.challenge;
623 }
624
625 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
626 {
627 return conn->smb1.server.security_mode;
628 }
629
630 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
631 {
632 return conn->smb1.server.readbraw;
633 }
634
635 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
636 {
637 return conn->smb1.server.writebraw;
638 }
639
640 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
641 {
642 return conn->smb1.server.lockread;
643 }
644
645 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
646 {
647 return conn->smb1.server.writeunlock;
648 }
649
650 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
651 {
652 return conn->smb1.server.time_zone;
653 }
654
655 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
656 const DATA_BLOB user_session_key,
657 const DATA_BLOB response)
658 {
659 return smb_signing_activate(conn->smb1.signing,
660 user_session_key,
661 response);
662 }
663
664 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
665 const uint8_t *buf, uint32_t seqnum)
666 {
667 const uint8_t *hdr = buf + NBT_HDR_SIZE;
668 size_t len = smb_len_nbt(buf);
669
670 return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
671 }
672
673 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
674 {
675 return smb_signing_is_active(conn->smb1.signing);
676 }
677
678 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
679 struct smb_trans_enc_state *es)
680 {
681 /* Replace the old state, if any. */
682 if (conn->smb1.trans_enc) {
683 TALLOC_FREE(conn->smb1.trans_enc);
684 }
685 conn->smb1.trans_enc = es;
686 }
687
688 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
689 {
690 return common_encryption_on(conn->smb1.trans_enc);
691 }
692
693
694 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
695 {
696 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
697 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
698
699 if (NT_STATUS_IS_OK(status)) {
700 return NT_STATUS_OK;
701 }
702
703 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
704 return status;
705 }
706
707 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
708 }
709
710 /**
711 * Is the SMB command able to hold an AND_X successor
712 * @param[in] cmd The SMB command in question
713 * @retval Can we add a chained request after "cmd"?
714 */
715 bool smb1cli_is_andx_req(uint8_t cmd)
716 {
717 switch (cmd) {
718 case SMBtconX:
719 case SMBlockingX:
720 case SMBopenX:
721 case SMBreadX:
722 case SMBwriteX:
723 case SMBsesssetupX:
724 case SMBulogoffX:
725 case SMBntcreateX:
726 return true;
727 break;
728 default:
729 break;
730 }
731
732 return false;
733 }
734
735 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
736 {
737 size_t num_pending = talloc_array_length(conn->pending);
738 uint16_t result;
739
740 if (conn->protocol == PROTOCOL_NONE) {
741 /*
742 * This is what windows sends on the SMB1 Negprot request
743 * and some vendors reuse the SMB1 MID as SMB2 sequence number.
744 */
745 return 0;
746 }
747
748 while (true) {
749 size_t i;
750
751 result = conn->smb1.mid++;
752 if ((result == 0) || (result == 0xffff)) {
753 continue;
754 }
755
756 for (i=0; i<num_pending; i++) {
757 if (result == smb1cli_req_mid(conn->pending[i])) {
758 break;
759 }
760 }
761
762 if (i == num_pending) {
763 return result;
764 }
765 }
766 }
767
768 void smbXcli_req_unset_pending(struct tevent_req *req)
769 {
770 struct smbXcli_req_state *state =
771 tevent_req_data(req,
772 struct smbXcli_req_state);
773 struct smbXcli_conn *conn = state->conn;
774 size_t num_pending = talloc_array_length(conn->pending);
775 size_t i;
776
777 if (state->smb1.mid != 0) {
778 /*
779 * This is a [nt]trans[2] request which waits
780 * for more than one reply.
781 */
782 return;
783 }
784
785 talloc_set_destructor(req, NULL);
786
787 if (num_pending == 1) {
788 /*
789 * The pending read_smb tevent_req is a child of
790 * conn->pending. So if nothing is pending anymore, we need to
791 * delete the socket read fde.
792 */
793 TALLOC_FREE(conn->pending);
794 conn->read_smb_req = NULL;
795 return;
796 }
797
798 for (i=0; i<num_pending; i++) {
799 if (req == conn->pending[i]) {
800 break;
801 }
802 }
803 if (i == num_pending) {
804 /*
805 * Something's seriously broken. Just returning here is the
806 * right thing nevertheless, the point of this routine is to
807 * remove ourselves from conn->pending.
808 */
809 return;
810 }
811
812 /*
813 * Remove ourselves from the conn->pending array
814 */
815 for (; i < (num_pending - 1); i++) {
816 conn->pending[i] = conn->pending[i+1];
817 }
818
819 /*
820 * No NULL check here, we're shrinking by sizeof(void *), and
821 * talloc_realloc just adjusts the size for this.
822 */
823 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
824 num_pending - 1);
825 return;
826 }
827
828 static int smbXcli_req_destructor(struct tevent_req *req)
829 {
830 struct smbXcli_req_state *state =
831 tevent_req_data(req,
832 struct smbXcli_req_state);
833
834 /*
835 * Make sure we really remove it from
836 * the pending array on destruction.
837 */
838 state->smb1.mid = 0;
839 smbXcli_req_unset_pending(req);
840 return 0;
841 }
842
843 static bool smb1cli_req_cancel(struct tevent_req *req);
844 static bool smb2cli_req_cancel(struct tevent_req *req);
845
846 static bool smbXcli_req_cancel(struct tevent_req *req)
847 {
848 struct smbXcli_req_state *state =
849 tevent_req_data(req,
850 struct smbXcli_req_state);
851
852 if (!smbXcli_conn_is_connected(state->conn)) {
853 return false;
854 }
855
856 if (state->conn->protocol == PROTOCOL_NONE) {
857 return false;
858 }
859
860 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
861 return smb2cli_req_cancel(req);
862 }
863
864 return smb1cli_req_cancel(req);
865 }
866
867 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
868
869 bool smbXcli_req_set_pending(struct tevent_req *req)
870 {
871 struct smbXcli_req_state *state =
872 tevent_req_data(req,
873 struct smbXcli_req_state);
874 struct smbXcli_conn *conn;
875 struct tevent_req **pending;
876 size_t num_pending;
877
878 conn = state->conn;
879
880 if (!smbXcli_conn_is_connected(conn)) {
881 return false;
882 }
883
884 num_pending = talloc_array_length(conn->pending);
885
886 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
887 num_pending+1);
888 if (pending == NULL) {
889 return false;
890 }
891 pending[num_pending] = req;
892 conn->pending = pending;
893 talloc_set_destructor(req, smbXcli_req_destructor);
894 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
895
896 if (!smbXcli_conn_receive_next(conn)) {
897 /*
898 * the caller should notify the current request
899 *
900 * And all other pending requests get notified
901 * by smbXcli_conn_disconnect().
902 */
903 smbXcli_req_unset_pending(req);
904 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
905 return false;
906 }
907
908 return true;
909 }
910
911 static void smbXcli_conn_received(struct tevent_req *subreq);
912
913 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
914 {
915 size_t num_pending = talloc_array_length(conn->pending);
916 struct tevent_req *req;
917 struct smbXcli_req_state *state;
918
919 if (conn->read_smb_req != NULL) {
920 return true;
921 }
922
923 if (num_pending == 0) {
924 if (conn->smb2.mid < UINT64_MAX) {
925 /* no more pending requests, so we are done for now */
926 return true;
927 }
928
929 /*
930 * If there are no more SMB2 requests possible,
931 * because we are out of message ids,
932 * we need to disconnect.
933 */
934 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
935 return true;
936 }
937
938 req = conn->pending[0];
939 state = tevent_req_data(req, struct smbXcli_req_state);
940
941 /*
942 * We're the first ones, add the read_smb request that waits for the
943 * answer from the server
944 */
945 conn->read_smb_req = read_smb_send(conn->pending,
946 state->ev,
947 conn->read_fd);
948 if (conn->read_smb_req == NULL) {
949 return false;
950 }
951 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
952 return true;
953 }
954
955 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
956 {
957 struct smbXcli_session *session;
958
959 tevent_queue_stop(conn->outgoing);
960
961 if (conn->read_fd != -1) {
962 close(conn->read_fd);
963 }
964 if (conn->write_fd != -1) {
965 close(conn->write_fd);
966 }
967 conn->read_fd = -1;
968 conn->write_fd = -1;
969
970 session = conn->sessions;
971 if (talloc_array_length(conn->pending) == 0) {
972 /*
973 * if we do not have pending requests
974 * there is no need to update the channel_sequence
975 */
976 session = NULL;
977 }
978 for (; session; session = session->next) {
979 smb2cli_session_increment_channel_sequence(session);
980 }
981
982 /*
983 * Cancel all pending requests. We do not do a for-loop walking
984 * conn->pending because that array changes in
985 * smbXcli_req_unset_pending.
986 */
987 while (talloc_array_length(conn->pending) > 0) {
988 struct tevent_req *req;
989 struct smbXcli_req_state *state;
990 struct tevent_req **chain;
991 size_t num_chained;
992 size_t i;
993
994 req = conn->pending[0];
995 state = tevent_req_data(req, struct smbXcli_req_state);
996
997 if (state->smb1.chained_requests == NULL) {
998 /*
999 * We're dead. No point waiting for trans2
1000 * replies.
1001 */
1002 state->smb1.mid = 0;
1003
1004 smbXcli_req_unset_pending(req);
1005
1006 if (NT_STATUS_IS_OK(status)) {
1007 /* do not notify the callers */
1008 continue;
1009 }
1010
1011 /*
1012 * we need to defer the callback, because we may notify
1013 * more then one caller.
1014 */
1015 tevent_req_defer_callback(req, state->ev);
1016 tevent_req_nterror(req, status);
1017 continue;
1018 }
1019
1020 chain = talloc_move(conn, &state->smb1.chained_requests);
1021 num_chained = talloc_array_length(chain);
1022
1023 for (i=0; i<num_chained; i++) {
1024 req = chain[i];
1025 state = tevent_req_data(req, struct smbXcli_req_state);
1026
1027 /*
1028 * We're dead. No point waiting for trans2
1029 * replies.
1030 */
1031 state->smb1.mid = 0;
1032
1033 smbXcli_req_unset_pending(req);
1034
1035 if (NT_STATUS_IS_OK(status)) {
1036 /* do not notify the callers */
1037 continue;
1038 }
1039
1040 /*
1041 * we need to defer the callback, because we may notify
1042 * more than one caller.
1043 */
1044 tevent_req_defer_callback(req, state->ev);
1045 tevent_req_nterror(req, status);
1046 }
1047 TALLOC_FREE(chain);
1048 }
1049 }
1050
1051 /*
1052 * Fetch a smb request's mid. Only valid after the request has been sent by
1053 * smb1cli_req_send().
1054 */
1055 uint16_t smb1cli_req_mid(struct tevent_req *req)
1056 {
1057 struct smbXcli_req_state *state =
1058 tevent_req_data(req,
1059 struct smbXcli_req_state);
1060
1061 if (state->smb1.mid != 0) {
1062 return state->smb1.mid;
1063 }
1064
1065 return SVAL(state->smb1.hdr, HDR_MID);
1066 }
1067
1068 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1069 {
1070 struct smbXcli_req_state *state =
1071 tevent_req_data(req,
1072 struct smbXcli_req_state);
1073
1074 state->smb1.mid = mid;
1075 }
1076
1077 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1078 {
1079 struct smbXcli_req_state *state =
1080 tevent_req_data(req,
1081 struct smbXcli_req_state);
1082
1083 return state->smb1.seqnum;
1084 }
1085
1086 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1087 {
1088 struct smbXcli_req_state *state =
1089 tevent_req_data(req,
1090 struct smbXcli_req_state);
1091
1092 state->smb1.seqnum = seqnum;
1093 }
1094
1095 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1096 {
1097 size_t result = 0;
1098 int i;
1099 for (i=0; i<count; i++) {
1100 result += iov[i].iov_len;
1101 }
1102 return result;
1103 }
1104
1105 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1106 const struct iovec *iov,
1107 int count)
1108 {
1109 size_t len = smbXcli_iov_len(iov, count);
1110 size_t copied;
1111 uint8_t *buf;
1112 int i;
1113
1114 buf = talloc_array(mem_ctx, uint8_t, len);
1115 if (buf == NULL) {
1116 return NULL;
1117 }
1118 copied = 0;
1119 for (i=0; i<count; i++) {
1120 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
1121 copied += iov[i].iov_len;
1122 }
1123 return buf;
1124 }
1125
1126 static void smb1cli_req_flags(enum protocol_types protocol,
1127 uint32_t smb1_capabilities,
1128 uint8_t smb_command,
1129 uint8_t additional_flags,
1130 uint8_t clear_flags,
1131 uint8_t *_flags,
1132 uint16_t additional_flags2,
1133 uint16_t clear_flags2,
1134 uint16_t *_flags2)
1135 {
1136 uint8_t flags = 0;
1137 uint16_t flags2 = 0;
1138
1139 if (protocol >= PROTOCOL_LANMAN1) {
1140 flags |= FLAG_CASELESS_PATHNAMES;
1141 flags |= FLAG_CANONICAL_PATHNAMES;
1142 }
1143
1144 if (protocol >= PROTOCOL_LANMAN2) {
1145 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1146 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1147 }
1148
1149 if (protocol >= PROTOCOL_NT1) {
1150 flags2 |= FLAGS2_IS_LONG_NAME;
1151
1152 if (smb1_capabilities & CAP_UNICODE) {
1153 flags2 |= FLAGS2_UNICODE_STRINGS;
1154 }
1155 if (smb1_capabilities & CAP_STATUS32) {
1156 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1157 }
1158 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1159 flags2 |= FLAGS2_EXTENDED_SECURITY;
1160 }
1161 }
1162
1163 flags |= additional_flags;
1164 flags &= ~clear_flags;
1165 flags2 |= additional_flags2;
1166 flags2 &= ~clear_flags2;
1167
1168 *_flags = flags;
1169 *_flags2 = flags2;
1170 }
1171
1172 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1173
1174 static bool smb1cli_req_cancel(struct tevent_req *req)
1175 {
1176 struct smbXcli_req_state *state =
1177 tevent_req_data(req,
1178 struct smbXcli_req_state);
1179 uint8_t flags;
1180 uint16_t flags2;
1181 uint32_t pid;
1182 uint16_t mid;
1183 struct tevent_req *subreq;
1184 NTSTATUS status;
1185
1186 flags = CVAL(state->smb1.hdr, HDR_FLG);
1187 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1188 pid = SVAL(state->smb1.hdr, HDR_PID);
1189 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1190 mid = SVAL(state->smb1.hdr, HDR_MID);
1191
1192 subreq = smb1cli_req_create(state, state->ev,
1193 state->conn,
1194 SMBntcancel,
1195 flags, 0,
1196 flags2, 0,
1197 0, /* timeout */
1198 pid,
1199 state->tcon,
1200 state->session,
1201 0, NULL, /* vwv */
1202 0, NULL); /* bytes */
1203 if (subreq == NULL) {
1204 return false;
1205 }
1206 smb1cli_req_set_mid(subreq, mid);
1207
1208 status = smb1cli_req_chain_submit(&subreq, 1);
1209 if (!NT_STATUS_IS_OK(status)) {
1210 TALLOC_FREE(subreq);
1211 return false;
1212 }
1213 smb1cli_req_set_mid(subreq, 0);
1214
1215 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1216
1217 return true;
1218 }
1219
1220 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1221 {
1222 /* we do not care about the result */
1223 TALLOC_FREE(subreq);
1224 }
1225
1226 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1227 struct tevent_context *ev,
1228 struct smbXcli_conn *conn,
1229 uint8_t smb_command,
1230 uint8_t additional_flags,
1231 uint8_t clear_flags,
1232 uint16_t additional_flags2,
1233 uint16_t clear_flags2,
1234 uint32_t timeout_msec,
1235 uint32_t pid,
1236 struct smbXcli_tcon *tcon,
1237 struct smbXcli_session *session,
1238 uint8_t wct, uint16_t *vwv,
1239 int iov_count,
1240 struct iovec *bytes_iov)
1241 {
1242 struct tevent_req *req;
1243 struct smbXcli_req_state *state;
1244 uint8_t flags = 0;
1245 uint16_t flags2 = 0;
1246 uint16_t uid = 0;
1247 uint16_t tid = 0;
1248
1249 if (iov_count > MAX_SMB_IOV) {
1250 /*
1251 * Should not happen :-)
1252 */
1253 return NULL;
1254 }
1255
1256 req = tevent_req_create(mem_ctx, &state,
1257 struct smbXcli_req_state);
1258 if (req == NULL) {
1259 return NULL;
1260 }
1261 state->ev = ev;
1262 state->conn = conn;
1263 state->session = session;
1264 state->tcon = tcon;
1265
1266 if (session) {
1267 uid = session->smb1.session_id;
1268 }
1269
1270 if (tcon) {
1271 tid = tcon->smb1.tcon_id;
1272 }
1273
1274 state->smb1.recv_cmd = 0xFF;
1275 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1276 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1277 if (state->smb1.recv_iov == NULL) {
1278 TALLOC_FREE(req);
1279 return NULL;
1280 }
1281
1282 smb1cli_req_flags(conn->protocol,
1283 conn->smb1.capabilities,
1284 smb_command,
1285 additional_flags,
1286 clear_flags,
1287 &flags,
1288 additional_flags2,
1289 clear_flags2,
1290 &flags2);
1291
1292 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1293 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1294 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1295 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1296 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1297 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1298 SSVAL(state->smb1.hdr, HDR_TID, tid);
1299 SSVAL(state->smb1.hdr, HDR_PID, pid);
1300 SSVAL(state->smb1.hdr, HDR_UID, uid);
1301 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1302 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1303
1304 state->smb1.vwv = vwv;
1305
1306 SSVAL(state->smb1.bytecount_buf, 0, smbXcli_iov_len(bytes_iov, iov_count));
1307
1308 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1309 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1310 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1311 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1312 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1313 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1314 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1315 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1316
1317 if (iov_count != 0) {
1318 memcpy(&state->smb1.iov[4], bytes_iov,
1319 iov_count * sizeof(*bytes_iov));
1320 }
1321 state->smb1.iov_count = iov_count + 4;
1322
1323 if (timeout_msec > 0) {
1324 struct timeval endtime;
1325
1326 endtime = timeval_current_ofs_msec(timeout_msec);
1327 if (!tevent_req_set_endtime(req, ev, endtime)) {
1328 return req;
1329 }
1330 }
1331
1332 switch (smb_command) {
1333 case SMBtranss:
1334 case SMBtranss2:
1335 case SMBnttranss:
1336 state->one_way = true;
1337 break;
1338 case SMBntcancel:
1339 state->one_way = true;
1340 state->smb1.one_way_seqnum = true;
1341 break;
1342 case SMBlockingX:
1343 if ((wct == 8) &&
1344 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1345 state->one_way = true;
1346 }
1347 break;
1348 }
1349
1350 return req;
1351 }
1352
1353 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1354 struct iovec *iov, int iov_count,
1355 uint32_t *seqnum,
1356 bool one_way_seqnum)
1357 {
1358 TALLOC_CTX *frame = NULL;
1359 uint8_t *buf;
1360
1361 /*
1362 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1363 * iovec directly. MD5Update would do that just fine.
1364 */
1365
1366 if (iov_count < 4) {
1367 return NT_STATUS_INVALID_PARAMETER_MIX;
1368 }
1369 if (iov[0].iov_len != NBT_HDR_SIZE) {
1370 return NT_STATUS_INVALID_PARAMETER_MIX;
1371 }
1372 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1373 return NT_STATUS_INVALID_PARAMETER_MIX;
1374 }
1375 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1376 return NT_STATUS_INVALID_PARAMETER_MIX;
1377 }
1378 if (iov[3].iov_len != sizeof(uint16_t)) {
1379 return NT_STATUS_INVALID_PARAMETER_MIX;
1380 }
1381
1382 frame = talloc_stackframe();
1383
1384 buf = smbXcli_iov_concat(frame, &iov[1], iov_count - 1);
1385 if (buf == NULL) {
1386 return NT_STATUS_NO_MEMORY;
1387 }
1388
1389 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1390 one_way_seqnum);
1391 smb_signing_sign_pdu(conn->smb1.signing,
1392 buf, talloc_get_size(buf),
1393 *seqnum);
1394 memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1395
1396 TALLOC_FREE(frame);
1397 return NT_STATUS_OK;
1398 }
1399
1400 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1401 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1402 TALLOC_CTX *tmp_mem,
1403 uint8_t *inbuf);
1404
1405 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1406 struct smbXcli_req_state *state,
1407 struct iovec *iov, int iov_count)
1408 {
1409 struct tevent_req *subreq;
1410 NTSTATUS status;
1411 uint8_t cmd;
1412 uint16_t mid;
1413
1414 if (!smbXcli_conn_is_connected(state->conn)) {
1415 return NT_STATUS_CONNECTION_DISCONNECTED;
1416 }
1417
1418 if (state->conn->protocol > PROTOCOL_NT1) {
1419 return NT_STATUS_REVISION_MISMATCH;
1420 }
1421
1422 if (iov_count < 4) {
1423 return NT_STATUS_INVALID_PARAMETER_MIX;
1424 }
1425 if (iov[0].iov_len != NBT_HDR_SIZE) {
1426 return NT_STATUS_INVALID_PARAMETER_MIX;
1427 }
1428 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1429 return NT_STATUS_INVALID_PARAMETER_MIX;
1430 }
1431 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1432 return NT_STATUS_INVALID_PARAMETER_MIX;
1433 }
1434 if (iov[3].iov_len != sizeof(uint16_t)) {
1435 return NT_STATUS_INVALID_PARAMETER_MIX;
1436 }
1437
1438 cmd = CVAL(iov[1].iov_base, HDR_COM);
1439 if (cmd == SMBreadBraw) {
1440 if (smbXcli_conn_has_async_calls(state->conn)) {
1441 return NT_STATUS_INVALID_PARAMETER_MIX;
1442 }
1443 state->conn->smb1.read_braw_req = req;
1444 }
1445
1446 if (state->smb1.mid != 0) {
1447 mid = state->smb1.mid;
1448 } else {
1449 mid = smb1cli_alloc_mid(state->conn);
1450 }
1451 SSVAL(iov[1].iov_base, HDR_MID, mid);
1452
1453 _smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
1454
1455 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1456 &state->smb1.seqnum,
1457 state->smb1.one_way_seqnum);
1458
1459 if (!NT_STATUS_IS_OK(status)) {
1460 return status;
1461 }
1462
1463 /*
1464 * If we supported multiple encrytion contexts
1465 * here we'd look up based on tid.
1466 */
1467 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1468 char *buf, *enc_buf;
1469
1470 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1471 if (buf == NULL) {
1472 return NT_STATUS_NO_MEMORY;
1473 }
1474 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1475 (char *)buf, &enc_buf);
1476 TALLOC_FREE(buf);
1477 if (!NT_STATUS_IS_OK(status)) {
1478 DEBUG(0, ("Error in encrypting client message: %s\n",
1479 nt_errstr(status)));
1480 return status;
1481 }
1482 buf = (char *)talloc_memdup(state, enc_buf,
1483 smb_len_nbt(enc_buf)+4);
1484 SAFE_FREE(enc_buf);
1485 if (buf == NULL) {
1486 return NT_STATUS_NO_MEMORY;
1487 }
1488 iov[0].iov_base = (void *)buf;
1489 iov[0].iov_len = talloc_get_size(buf);
1490 iov_count = 1;
1491 }
1492
1493 if (state->conn->dispatch_incoming == NULL) {
1494 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1495 }
1496
1497 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1498
1499 subreq = writev_send(state, state->ev, state->conn->outgoing,
1500 state->conn->write_fd, false, iov, iov_count);
1501 if (subreq == NULL) {
1502 return NT_STATUS_NO_MEMORY;
1503 }
1504 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1505 return NT_STATUS_OK;
1506 }
1507
1508 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1509 struct tevent_context *ev,
1510 struct smbXcli_conn *conn,
1511 uint8_t smb_command,
1512 uint8_t additional_flags,
1513 uint8_t clear_flags,
1514 uint16_t additional_flags2,
1515 uint16_t clear_flags2,
1516 uint32_t timeout_msec,
1517 uint32_t pid,
1518 struct smbXcli_tcon *tcon,
1519 struct smbXcli_session *session,
1520 uint8_t wct, uint16_t *vwv,
1521 uint32_t num_bytes,
1522 const uint8_t *bytes)
1523 {
1524 struct tevent_req *req;
1525 struct iovec iov;
1526 NTSTATUS status;
1527
1528 iov.iov_base = discard_const_p(void, bytes);
1529 iov.iov_len = num_bytes;
1530
1531 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1532 additional_flags, clear_flags,
1533 additional_flags2, clear_flags2,
1534 timeout_msec,
1535 pid, tcon, session,
1536 wct, vwv, 1, &iov);
1537 if (req == NULL) {
1538 return NULL;
1539 }
1540 if (!tevent_req_is_in_progress(req)) {
1541 return tevent_req_post(req, ev);
1542 }
1543 status = smb1cli_req_chain_submit(&req, 1);
1544 if (tevent_req_nterror(req, status)) {
1545 return tevent_req_post(req, ev);
1546 }
1547 return req;
1548 }
1549
1550 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1551 {
1552 struct tevent_req *req =
1553 tevent_req_callback_data(subreq,
1554 struct tevent_req);
1555 struct smbXcli_req_state *state =
1556 tevent_req_data(req,
1557 struct smbXcli_req_state);
1558 ssize_t nwritten;
1559 int err;
1560
1561 nwritten = writev_recv(subreq, &err);
1562 TALLOC_FREE(subreq);
1563 if (nwritten == -1) {
1564 NTSTATUS status = map_nt_error_from_unix_common(err);
1565 smbXcli_conn_disconnect(state->conn, status);
1566 return;
1567 }
1568
1569 if (state->one_way) {
1570 state->inbuf = NULL;
1571 tevent_req_done(req);
1572 return;
1573 }
1574
1575 if (!smbXcli_req_set_pending(req)) {
1576 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1577 return;
1578 }
1579 }
1580
1581 static void smbXcli_conn_received(struct tevent_req *subreq)
1582 {
1583 struct smbXcli_conn *conn =
1584 tevent_req_callback_data(subreq,
1585 struct smbXcli_conn);
1586 TALLOC_CTX *frame = talloc_stackframe();
1587 NTSTATUS status;
1588 uint8_t *inbuf;
1589 ssize_t received;
1590 int err;
1591
1592 if (subreq != conn->read_smb_req) {
1593 DEBUG(1, ("Internal error: cli_smb_received called with "
1594 "unexpected subreq\n"));
1595 smbXcli_conn_disconnect(conn, NT_STATUS_INTERNAL_ERROR);
1596 TALLOC_FREE(frame);
1597 return;
1598 }
1599 conn->read_smb_req = NULL;
1600
1601 received = read_smb_recv(subreq, frame, &inbuf, &err);
1602 TALLOC_FREE(subreq);
1603 if (received == -1) {
1604 status = map_nt_error_from_unix_common(err);
1605 smbXcli_conn_disconnect(conn, status);
1606 TALLOC_FREE(frame);
1607 return;
1608 }
1609
1610 status = conn->dispatch_incoming(conn, frame, inbuf);
1611 TALLOC_FREE(frame);
1612 if (NT_STATUS_IS_OK(status)) {
1613 /*
1614 * We should not do any more processing
1615 * as the dispatch function called
1616 * tevent_req_done().
1617 */
1618 return;
1619 }
1620
1621 if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1622 /*
1623 * We got an error, so notify all pending requests
1624 */
1625 smbXcli_conn_disconnect(conn, status);
1626 return;
1627 }
1628
1629 /*
1630 * We got NT_STATUS_RETRY, so we may ask for a
1631 * next incoming pdu.
1632 */
1633 if (!smbXcli_conn_receive_next(conn)) {
1634 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1635 }
1636 }
1637
1638 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1639 struct iovec **piov, int *pnum_iov)
1640 {
1641 struct iovec *iov;
1642 int num_iov;
1643 size_t buflen;
1644 size_t taken;
1645 size_t remaining;
1646 uint8_t *hdr;
1647 uint8_t cmd;
1648 uint32_t wct_ofs;
1649 NTSTATUS status;
1650 size_t min_size = MIN_SMB_SIZE;
1651
1652 buflen = smb_len_tcp(buf);
1653 taken = 0;
1654
1655 hdr = buf + NBT_HDR_SIZE;
1656
1657 status = smb1cli_pull_raw_error(hdr);
1658 if (NT_STATUS_IS_ERR(status)) {
1659 /*
1660 * This is an ugly hack to support OS/2
1661 * which skips the byte_count in the DATA block
1662 * on some error responses.
1663 *
1664 * See bug #9096
1665 */
1666 min_size -= sizeof(uint16_t);
1667 }
1668
1669 if (buflen < min_size) {
1670 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1671 }
1672
1673 /*
1674 * This returns iovec elements in the following order:
1675 *
1676 * - SMB header
1677 *
1678 * - Parameter Block
1679 * - Data Block
1680 *
1681 * - Parameter Block
1682 * - Data Block
1683 *
1684 * - Parameter Block
1685 * - Data Block
1686 */
1687 num_iov = 1;
1688
1689 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1690 if (iov == NULL) {
1691 return NT_STATUS_NO_MEMORY;
1692 }
1693 iov[0].iov_base = hdr;
1694 iov[0].iov_len = HDR_WCT;
1695 taken += HDR_WCT;
1696
1697 cmd = CVAL(hdr, HDR_COM);
1698 wct_ofs = HDR_WCT;
1699
1700 while (true) {
1701 size_t len = buflen - taken;
1702 struct iovec *cur;
1703 struct iovec *iov_tmp;
1704 uint8_t wct;
1705 uint32_t bcc_ofs;
1706 uint16_t bcc;
1707 size_t needed;
1708
1709 /*
1710 * we need at least WCT
1711 */
1712 needed = sizeof(uint8_t);
1713 if (len < needed) {
1714 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1715 __location__, (int)len, (int)needed));
1716 goto inval;
1717 }
1718
1719 /*
1720 * Now we check if the specified words are there
1721 */
1722 wct = CVAL(hdr, wct_ofs);
1723 needed += wct * sizeof(uint16_t);
1724 if (len < needed) {
1725 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1726 __location__, (int)len, (int)needed));
1727 goto inval;
1728 }
1729
1730 if ((num_iov == 1) &&
1731 (len == needed) &&
1732 NT_STATUS_IS_ERR(status))
1733 {
1734 /*
1735 * This is an ugly hack to support OS/2
1736 * which skips the byte_count in the DATA block
1737 * on some error responses.
1738 *
1739 * See bug #9096
1740 */
1741 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1742 num_iov + 2);
1743 if (iov_tmp == NULL) {
1744 TALLOC_FREE(iov);
1745 return NT_STATUS_NO_MEMORY;
1746 }
1747 iov = iov_tmp;
1748 cur = &iov[num_iov];
1749 num_iov += 2;
1750
1751 cur[0].iov_len = 0;
1752 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1753 cur[1].iov_len = 0;
1754 cur[1].iov_base = cur[0].iov_base;
1755
1756 taken += needed;
1757 break;
1758 }
1759
1760 /*
1761 * we need at least BCC
1762 */
1763 needed += sizeof(uint16_t);
1764 if (len < needed) {
1765 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1766 __location__, (int)len, (int)needed));
1767 goto inval;
1768 }
1769
1770 /*
1771 * Now we check if the specified bytes are there
1772 */
1773 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1774 bcc = SVAL(hdr, bcc_ofs);
1775 needed += bcc * sizeof(uint8_t);
1776 if (len < needed) {
1777 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1778 __location__, (int)len, (int)needed));
1779 goto inval;
1780 }
1781
1782 /*
1783 * we allocate 2 iovec structures for words and bytes
1784 */
1785 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1786 num_iov + 2);
1787 if (iov_tmp == NULL) {
1788 TALLOC_FREE(iov);
1789 return NT_STATUS_NO_MEMORY;
1790 }
1791 iov = iov_tmp;
1792 cur = &iov[num_iov];
1793 num_iov += 2;
1794
1795 cur[0].iov_len = wct * sizeof(uint16_t);
1796 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1797 cur[1].iov_len = bcc * sizeof(uint8_t);
1798 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1799
1800 taken += needed;
1801
1802 if (!smb1cli_is_andx_req(cmd)) {
1803 /*
1804 * If the current command does not have AndX chanining
1805 * we are done.
1806 */
1807 break;
1808 }
1809
1810 if (wct == 0 && bcc == 0) {
1811 /*
1812 * An empty response also ends the chain,
1813 * most likely with an error.
1814 */
1815 break;
1816 }
1817
1818 if (wct < 2) {
1819 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1820 __location__, (int)wct, (int)cmd));
1821 goto inval;
1822 }
1823 cmd = CVAL(cur[0].iov_base, 0);
1824 if (cmd == 0xFF) {
1825 /*
1826 * If it is the end of the chain we are also done.
1827 */
1828 break;
1829 }
1830 wct_ofs = SVAL(cur[0].iov_base, 2);
1831
1832 if (wct_ofs < taken) {
1833 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1834 }
1835 if (wct_ofs > buflen) {
1836 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1837 }
1838
1839 /*
1840 * we consumed everything up to the start of the next
1841 * parameter block.
1842 */
1843 taken = wct_ofs;
1844 }
1845
1846 remaining = buflen - taken;
1847
1848 if (remaining > 0 && num_iov >= 3) {
1849 /*
1850 * The last DATA block gets the remaining
1851 * bytes, this is needed to support
1852 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1853 */
1854 iov[num_iov-1].iov_len += remaining;
1855 }
1856
1857 *piov = iov;
1858 *pnum_iov = num_iov;
1859 return NT_STATUS_OK;
1860
1861 inval:
1862 TALLOC_FREE(iov);
1863 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1864 }
1865
1866 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1867 TALLOC_CTX *tmp_mem,
1868 uint8_t *inbuf)
1869 {
1870 struct tevent_req *req;
1871 struct smbXcli_req_state *state;
1872 NTSTATUS status;
1873 size_t num_pending;
1874 size_t i;
1875 uint8_t cmd;
1876 uint16_t mid;
1877 bool oplock_break;
1878 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1879 size_t len = smb_len_tcp(inbuf);
1880 struct iovec *iov = NULL;
1881 int num_iov = 0;
1882 struct tevent_req **chain = NULL;
1883 size_t num_chained = 0;
1884 size_t num_responses = 0;
1885
1886 if (conn->smb1.read_braw_req != NULL) {
1887 req = conn->smb1.read_braw_req;
1888 conn->smb1.read_braw_req = NULL;
1889 state = tevent_req_data(req, struct smbXcli_req_state);
1890
1891 smbXcli_req_unset_pending(req);
1892
1893 if (state->smb1.recv_iov == NULL) {
1894 /*
1895 * For requests with more than
1896 * one response, we have to readd the
1897 * recv_iov array.
1898 */
1899 state->smb1.recv_iov = talloc_zero_array(state,
1900 struct iovec,
1901 3);
1902 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1903 return NT_STATUS_OK;
1904 }
1905 }
1906
1907 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
1908 state->smb1.recv_iov[0].iov_len = len;
1909 ZERO_STRUCT(state->smb1.recv_iov[1]);
1910 ZERO_STRUCT(state->smb1.recv_iov[2]);
1911
1912 state->smb1.recv_cmd = SMBreadBraw;
1913 state->smb1.recv_status = NT_STATUS_OK;
1914 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1915
1916 tevent_req_done(req);
1917 return NT_STATUS_OK;
1918 }
1919
1920 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1921 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1922 DEBUG(10, ("Got non-SMB PDU\n"));
1923 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1924 }
1925
1926 /*
1927 * If we supported multiple encrytion contexts
1928 * here we'd look up based on tid.
1929 */
1930 if (common_encryption_on(conn->smb1.trans_enc)
1931 && (CVAL(inbuf, 0) == 0)) {
1932 uint16_t enc_ctx_num;
1933
1934 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1935 if (!NT_STATUS_IS_OK(status)) {
1936 DEBUG(10, ("get_enc_ctx_num returned %s\n",
1937 nt_errstr(status)));
1938 return status;
1939 }
1940
1941 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1942 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1943 enc_ctx_num,
1944 conn->smb1.trans_enc->enc_ctx_num));
1945 return NT_STATUS_INVALID_HANDLE;
1946 }
1947
1948 status = common_decrypt_buffer(conn->smb1.trans_enc,
1949 (char *)inbuf);
1950 if (!NT_STATUS_IS_OK(status)) {
1951 DEBUG(10, ("common_decrypt_buffer returned %s\n",
1952 nt_errstr(status)));
1953 return status;
1954 }
1955 inhdr = inbuf + NBT_HDR_SIZE;
1956 len = smb_len_nbt(inbuf);
1957 }
1958
1959 mid = SVAL(inhdr, HDR_MID);
1960 num_pending = talloc_array_length(conn->pending);
1961
1962 for (i=0; i<num_pending; i++) {
1963 if (mid == smb1cli_req_mid(conn->pending[i])) {
1964 break;
1965 }
1966 }
1967 if (i == num_pending) {
1968 /* Dump unexpected reply */
1969 return NT_STATUS_RETRY;
1970 }
1971
1972 oplock_break = false;
1973
1974 if (mid == 0xffff) {
1975 /*
1976 * Paranoia checks that this is really an oplock break request.
1977 */
1978 oplock_break = (len == 51); /* hdr + 8 words */
1979 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
1980 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
1981 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
1982 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
1983
1984 if (!oplock_break) {
1985 /* Dump unexpected reply */
1986 return NT_STATUS_RETRY;
1987 }
1988 }
1989
1990 req = conn->pending[i];
1991 state = tevent_req_data(req, struct smbXcli_req_state);
1992
1993 if (!oplock_break /* oplock breaks are not signed */
1994 && !smb_signing_check_pdu(conn->smb1.signing,
1995 inhdr, len, state->smb1.seqnum+1)) {
1996 DEBUG(10, ("cli_check_sign_mac failed\n"));
1997 return NT_STATUS_ACCESS_DENIED;
1998 }
1999
2000 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
2001 &iov, &num_iov);
2002 if (!NT_STATUS_IS_OK(status)) {
2003 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
2004 nt_errstr(status)));
2005 return status;
2006 }
2007
2008 cmd = CVAL(inhdr, HDR_COM);
2009 status = smb1cli_pull_raw_error(inhdr);
2010
2011 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
2012 (state->session != NULL) && state->session->disconnect_expired)
2013 {
2014 /*
2015 * this should be a short term hack
2016 * until the upper layers have implemented
2017 * re-authentication.
2018 */
2019 return status;
2020 }
2021
2022 if (state->smb1.chained_requests == NULL) {
2023 if (num_iov != 3) {
2024 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2025 }
2026
2027 smbXcli_req_unset_pending(req);
2028
2029 if (state->smb1.recv_iov == NULL) {
2030 /*
2031 * For requests with more than
2032 * one response, we have to readd the
2033 * recv_iov array.
2034 */
2035 state->smb1.recv_iov = talloc_zero_array(state,
2036 struct iovec,
2037 3);
2038 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2039 return NT_STATUS_OK;
2040 }
2041 }
2042
2043 state->smb1.recv_cmd = cmd;
2044 state->smb1.recv_status = status;
2045 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2046
2047 state->smb1.recv_iov[0] = iov[0];
2048 state->smb1.recv_iov[1] = iov[1];
2049 state->smb1.recv_iov[2] = iov[2];
2050
2051 if (talloc_array_length(conn->pending) == 0) {
2052 tevent_req_done(req);
2053 return NT_STATUS_OK;
2054 }
2055
2056 tevent_req_defer_callback(req, state->ev);
2057 tevent_req_done(req);
2058 return NT_STATUS_RETRY;
2059 }
2060
2061 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2062 num_chained = talloc_array_length(chain);
2063 num_responses = (num_iov - 1)/2;
2064
2065 if (num_responses > num_chained) {
2066 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2067 }
2068
2069 for (i=0; i<num_chained; i++) {
2070 size_t iov_idx = 1 + (i*2);
2071 struct iovec *cur = &iov[iov_idx];
2072 uint8_t *inbuf_ref;
2073
2074 req = chain[i];
2075 state = tevent_req_data(req, struct smbXcli_req_state);
2076
2077 smbXcli_req_unset_pending(req);
2078
2079 /*
2080 * as we finish multiple requests here
2081 * we need to defer the callbacks as
2082 * they could destroy our current stack state.
2083 */
2084 tevent_req_defer_callback(req, state->ev);
2085
2086 if (i >= num_responses) {
2087 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2088 continue;
2089 }
2090
2091 if (state->smb1.recv_iov == NULL) {
2092 /*
2093 * For requests with more than
2094 * one response, we have to readd the
2095 * recv_iov array.
2096 */
2097 state->smb1.recv_iov = talloc_zero_array(state,
2098 struct iovec,
2099 3);
2100 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2101 continue;
2102 }
2103 }
2104
2105 state->smb1.recv_cmd = cmd;
2106
2107 if (i == (num_responses - 1)) {
2108 /*
2109 * The last request in the chain gets the status
2110 */
2111 state->smb1.recv_status = status;
2112 } else {
2113 cmd = CVAL(cur[0].iov_base, 0);
2114 state->smb1.recv_status = NT_STATUS_OK;
2115 }
2116
2117 state->inbuf = inbuf;
2118
2119 /*
2120 * Note: here we use talloc_reference() in a way
2121 * that does not expose it to the caller.
2122 */
2123 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2124 if (tevent_req_nomem(inbuf_ref, req)) {
2125 continue;
2126 }
2127
2128 /* copy the related buffers */
2129 state->smb1.recv_iov[0] = iov[0];
2130 state->smb1.recv_iov[1] = cur[0];
2131 state->smb1.recv_iov[2] = cur[1];
2132
2133 tevent_req_done(req);
2134 }
2135
2136 return NT_STATUS_RETRY;
2137 }
2138
2139 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2140 TALLOC_CTX *mem_ctx,
2141 struct iovec **piov,
2142 uint8_t **phdr,
2143 uint8_t *pwct,
2144 uint16_t **pvwv,
2145 uint32_t *pvwv_offset,
2146 uint32_t *pnum_bytes,
2147 uint8_t **pbytes,
2148 uint32_t *pbytes_offset,
2149 uint8_t **pinbuf,
2150 const struct smb1cli_req_expected_response *expected,
2151 size_t num_expected)
2152 {
2153 struct smbXcli_req_state *state =
2154 tevent_req_data(req,
2155 struct smbXcli_req_state);
2156 NTSTATUS status = NT_STATUS_OK;
2157 struct iovec *recv_iov = NULL;
2158 uint8_t *hdr = NULL;
2159 uint8_t wct = 0;
2160 uint32_t vwv_offset = 0;
2161 uint16_t *vwv = NULL;
2162 uint32_t num_bytes = 0;
2163 uint32_t bytes_offset = 0;
2164 uint8_t *bytes = NULL;
2165 size_t i;
2166 bool found_status = false;
2167 bool found_size = false;
2168
2169 if (piov != NULL) {
2170 *piov = NULL;
2171 }
2172 if (phdr != NULL) {
2173 *phdr = 0;
2174 }
2175 if (pwct != NULL) {
2176 *pwct = 0;
2177 }
2178 if (pvwv != NULL) {
2179 *pvwv = NULL;
2180 }
2181 if (pvwv_offset != NULL) {
2182 *pvwv_offset = 0;
2183 }
2184 if (pnum_bytes != NULL) {
2185 *pnum_bytes = 0;
2186 }
2187 if (pbytes != NULL) {
2188 *pbytes = NULL;
2189 }
2190 if (pbytes_offset != NULL) {
2191 *pbytes_offset = 0;
2192 }
2193 if (pinbuf != NULL) {
2194 *pinbuf = NULL;
2195 }
2196
2197 if (state->inbuf != NULL) {
2198 recv_iov = state->smb1.recv_iov;
2199 state->smb1.recv_iov = NULL;
2200 if (state->smb1.recv_cmd != SMBreadBraw) {
2201 hdr = (uint8_t *)recv_iov[0].iov_base;
2202 wct = recv_iov[1].iov_len/2;
2203 vwv = (uint16_t *)recv_iov[1].iov_base;
2204 vwv_offset = PTR_DIFF(vwv, hdr);
2205 num_bytes = recv_iov[2].iov_len;
2206 bytes = (uint8_t *)recv_iov[2].iov_base;
2207 bytes_offset = PTR_DIFF(bytes, hdr);
2208 }
2209 }
2210
2211 if (tevent_req_is_nterror(req, &status)) {
2212 for (i=0; i < num_expected; i++) {
2213 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2214 found_status = true;
2215 break;
2216 }
2217 }
2218
2219 if (found_status) {
2220 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2221 }
2222
2223 return status;
2224 }
2225
2226 if (num_expected == 0) {
2227 found_status = true;
2228 found_size = true;
2229 }
2230
2231 status = state->smb1.recv_status;
2232
2233 for (i=0; i < num_expected; i++) {
2234 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2235 continue;
2236 }
2237
2238 found_status = true;
2239 if (expected[i].wct == 0) {
2240 found_size = true;
2241 break;
2242 }
2243
2244 if (expected[i].wct == wct) {
2245 found_size = true;
2246 break;
2247 }
2248 }
2249
2250 if (!found_status) {
2251 return status;
2252 }
2253
2254 if (!found_size) {
2255 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2256 }
2257
2258 if (piov != NULL) {
2259 *piov = talloc_move(mem_ctx, &recv_iov);
2260 }
2261
2262 if (phdr != NULL) {
2263 *phdr = hdr;
2264 }
2265 if (pwct != NULL) {
2266 *pwct = wct;
2267 }
2268 if (pvwv != NULL) {
2269 *pvwv = vwv;
2270 }
2271 if (pvwv_offset != NULL) {
2272 *pvwv_offset = vwv_offset;
2273 }
2274 if (pnum_bytes != NULL) {
2275 *pnum_bytes = num_bytes;
2276 }
2277 if (pbytes != NULL) {
2278 *pbytes = bytes;
2279 }
2280 if (pbytes_offset != NULL) {
2281 *pbytes_offset = bytes_offset;
2282 }
2283 if (pinbuf != NULL) {
2284 *pinbuf = state->inbuf;
2285 }
2286
2287 return status;
2288 }
2289
2290 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2291 {
2292 size_t wct_ofs;
2293 int i;
2294
2295 wct_ofs = HDR_WCT;
2296
2297 for (i=0; i<num_reqs; i++) {
2298 struct smbXcli_req_state *state;
2299 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2300 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2301 state->smb1.iov_count-2);
2302 wct_ofs = (wct_ofs + 3) & ~3;
2303 }
2304 return wct_ofs;
2305 }
2306
2307 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2308 {
2309 struct smbXcli_req_state *first_state =
2310 tevent_req_data(reqs[0],
2311 struct smbXcli_req_state);
2312 struct smbXcli_req_state *state;
2313 size_t wct_offset;
2314 size_t chain_padding = 0;
2315 int i, iovlen;
2316 struct iovec *iov = NULL;
2317 struct iovec *this_iov;
2318 NTSTATUS status;
2319 size_t nbt_len;
2320
2321 if (num_reqs == 1) {
2322 return smb1cli_req_writev_submit(reqs[0], first_state,
2323 first_state->smb1.iov,
2324 first_state->smb1.iov_count);
2325 }
2326
2327 iovlen = 0;
2328 for (i=0; i<num_reqs; i++) {
2329 if (!tevent_req_is_in_progress(reqs[i])) {
2330 return NT_STATUS_INTERNAL_ERROR;
2331 }
2332
2333 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2334
2335 if (state->smb1.iov_count < 4) {
2336 return NT_STATUS_INVALID_PARAMETER_MIX;
2337 }
2338
2339 if (i == 0) {
2340 /*
2341 * The NBT and SMB header
2342 */
2343 iovlen += 2;
2344 } else {
2345 /*
2346 * Chain padding
2347 */
2348 iovlen += 1;
2349 }
2350
2351 /*
2352 * words and bytes
2353 */
2354 iovlen += state->smb1.iov_count - 2;
2355 }
2356
2357 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2358 if (iov == NULL) {
2359 return NT_STATUS_NO_MEMORY;
2360 }
2361
2362 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2363 first_state, reqs, sizeof(*reqs) * num_reqs);
2364 if (first_state->smb1.chained_requests == NULL) {
2365 TALLOC_FREE(iov);
2366 return NT_STATUS_NO_MEMORY;
2367 }
2368
2369 wct_offset = HDR_WCT;
2370 this_iov = iov;
2371
2372 for (i=0; i<num_reqs; i++) {
2373 size_t next_padding = 0;
2374 uint16_t *vwv;
2375
2376 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2377
2378 if (i < num_reqs-1) {
2379 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2380 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2381 TALLOC_FREE(iov);
2382 TALLOC_FREE(first_state->smb1.chained_requests);
2383 return NT_STATUS_INVALID_PARAMETER_MIX;
2384 }
2385 }
2386
2387 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2388 state->smb1.iov_count-2) + 1;
2389 if ((wct_offset % 4) != 0) {
2390 next_padding = 4 - (wct_offset % 4);
2391 }
2392 wct_offset += next_padding;
2393 vwv = state->smb1.vwv;
2394
2395 if (i < num_reqs-1) {
2396 struct smbXcli_req_state *next_state =
2397 tevent_req_data(reqs[i+1],
2398 struct smbXcli_req_state);
2399 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2400 SCVAL(vwv+0, 1, 0);
2401 SSVAL(vwv+1, 0, wct_offset);
2402 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2403 /* properly end the chain */
2404 SCVAL(vwv+0, 0, 0xff);
2405 SCVAL(vwv+0, 1, 0xff);
2406 SSVAL(vwv+1, 0, 0);
2407 }
2408
2409 if (i == 0) {
2410 /*
2411 * The NBT and SMB header
2412 */
2413 this_iov[0] = state->smb1.iov[0];
2414 this_iov[1] = state->smb1.iov[1];
2415 this_iov += 2;
2416 } else {
2417 /*
2418 * This one is a bit subtle. We have to add
2419 * chain_padding bytes between the requests, and we
2420 * have to also include the wct field of the
2421 * subsequent requests. We use the subsequent header
2422 * for the padding, it contains the wct field in its
2423 * last byte.
2424 */
2425 this_iov[0].iov_len = chain_padding+1;
2426 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2427 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2428 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2429 this_iov += 1;
2430 }
2431
2432 /*
2433 * copy the words and bytes
2434 */
2435 memcpy(this_iov, state->smb1.iov+2,
2436 sizeof(struct iovec) * (state->smb1.iov_count-2));
2437 this_iov += state->smb1.iov_count - 2;
2438 chain_padding = next_padding;
2439 }
2440
2441 nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
2442 if (nbt_len > first_state->conn->smb1.max_xmit) {
2443 TALLOC_FREE(iov);
2444 TALLOC_FREE(first_state->smb1.chained_requests);
2445 return NT_STATUS_INVALID_PARAMETER_MIX;
2446 }
2447
2448 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2449 if (!NT_STATUS_IS_OK(status)) {
2450 TALLOC_FREE(iov);
2451 TALLOC_FREE(first_state->smb1.chained_requests);
2452 return status;
2453 }
2454
2455 return NT_STATUS_OK;
2456 }
2457
2458 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2459 {
2460 return ((tevent_queue_length(conn->outgoing) != 0)
2461 || (talloc_array_length(conn->pending) != 0));
2462 }
2463
2464 bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn)
2465 {
2466 if (conn->protocol >= PROTOCOL_SMB2_02) {
2467 return (smb2cli_conn_server_capabilities(conn) & SMB2_CAP_DFS);
2468 }
2469
2470 return (smb1cli_conn_capabilities(conn) & CAP_DFS);
2471 }
2472
2473 bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
2474 {
2475 uint16_t credits = 1;
2476
2477 if (conn->smb2.cur_credits == 0) {
2478 if (max_dyn_len != NULL) {
2479 *max_dyn_len = 0;
2480 }
2481 return false;
2482 }
2483
2484 if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2485 credits = conn->smb2.cur_credits;
2486 }
2487
2488 if (max_dyn_len != NULL) {
2489 *max_dyn_len = credits * 65536;
2490 }
2491
2492 return true;
2493 }
2494
2495 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2496 {
2497 return conn->smb2.server.capabilities;
2498 }
2499
2500 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2501 {
2502 return conn->smb2.server.security_mode;
2503 }
2504
2505 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2506 {
2507 return conn->smb2.server.max_trans_size;
2508 }
2509
2510 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2511 {
2512 return conn->smb2.server.max_read_size;
2513 }
2514
2515 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2516 {
2517 return conn->smb2.server.max_write_size;
2518 }
2519
2520 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2521 uint16_t max_credits)
2522 {
2523 conn->smb2.max_credits = max_credits;
2524 }
2525
2526 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2527
2528 static bool smb2cli_req_cancel(struct tevent_req *req)
2529 {
2530 struct smbXcli_req_state *state =
2531 tevent_req_data(req,
2532 struct smbXcli_req_state);
2533 uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2534 uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2535 uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
2536 struct smbXcli_tcon *tcon = state->tcon;
2537 struct smbXcli_session *session = state->session;
2538 uint8_t *fixed = state->smb2.pad;
2539 uint16_t fixed_len = 4;
2540 struct tevent_req *subreq;
2541 struct smbXcli_req_state *substate;
2542 NTSTATUS status;
2543
2544 SSVAL(fixed, 0, 0x04);
2545 SSVAL(fixed, 2, 0);
2546
2547 subreq = smb2cli_req_create(state, state->ev,
2548 state->conn,
2549 SMB2_OP_CANCEL,
2550 flags, 0,
2551 0, /* timeout */
2552 tcon, session,
2553 fixed, fixed_len,
2554 NULL, 0, 0);
2555 if (subreq == NULL) {
2556 return false;
2557 }
2558 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2559
2560 /*
2561 * clear everything but the SMB2_HDR_FLAG_ASYNC flag
2562 * e.g. if SMB2_HDR_FLAG_CHAINED is set we get INVALID_PARAMETER back
2563 */
2564 flags &= SMB2_HDR_FLAG_ASYNC;
2565
2566 if (flags & SMB2_HDR_FLAG_ASYNC) {
2567 mid = 0;
2568 }
2569
2570 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
2571 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2572 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
2573
2574 status = smb2cli_req_compound_submit(&subreq, 1);
2575 if (!NT_STATUS_IS_OK(status)) {
2576 TALLOC_FREE(subreq);
2577 return false;
2578 }
2579
2580 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2581
2582 return true;
2583 }
2584
2585 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2586 {
2587 /* we do not care about the result */
2588 TALLOC_FREE(subreq);
2589 }
2590
2591 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2592 struct tevent_context *ev,
2593 struct smbXcli_conn *conn,
2594 uint16_t cmd,
2595 uint32_t additional_flags,
2596 uint32_t clear_flags,
2597 uint32_t timeout_msec,
2598 struct smbXcli_tcon *tcon,
2599 struct smbXcli_session *session,
2600 const uint8_t *fixed,
2601 uint16_t fixed_len,
2602 const uint8_t *dyn,
2603 uint32_t dyn_len,
2604 uint32_t max_dyn_len)
2605 {
2606 struct tevent_req *req;
2607 struct smbXcli_req_state *state;
2608 uint32_t flags = 0;
2609 uint32_t tid = 0;
2610 uint64_t uid = 0;
2611 bool use_channel_sequence = false;
2612 uint16_t channel_sequence = 0;
2613
2614 req = tevent_req_create(mem_ctx, &state,
2615 struct smbXcli_req_state);
2616 if (req == NULL) {
2617 return NULL;
2618 }
2619
2620 state->ev = ev;
2621 state->conn = conn;
2622 state->session = session;
2623 state->tcon = tcon;
2624
2625 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2626 use_channel_sequence = true;
2627 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2628 use_channel_sequence = true;
2629 }
2630
2631 if (session) {
2632 uid = session->smb2->session_id;
2633
2634 if (use_channel_sequence) {
2635 channel_sequence = session->smb2->channel_sequence;
2636 }
2637
2638 state->smb2.should_sign = session->smb2->should_sign;
2639 state->smb2.should_encrypt = session->smb2->should_encrypt;
2640
2641 if (cmd == SMB2_OP_SESSSETUP &&
2642 session->smb2->signing_key.length != 0) {
2643 state->smb2.should_sign = true;
2644 }
2645
2646 if (cmd == SMB2_OP_SESSSETUP &&
2647 session->smb2_channel.signing_key.length == 0) {
2648 state->smb2.should_encrypt = false;
2649 }
2650 }
2651
2652 if (tcon) {
2653 tid = tcon->smb2.tcon_id;
2654
2655 if (tcon->smb2.should_encrypt) {
2656 state->smb2.should_encrypt = true;
2657 }
2658 }
2659
2660 if (state->smb2.should_encrypt) {
2661 state->smb2.should_sign = false;
2662 }
2663
2664 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2665 if (state->smb2.recv_iov == NULL) {
2666 TALLOC_FREE(req);
2667 return NULL;
2668 }
2669
2670 flags |= additional_flags;
2671 flags &= ~clear_flags;
2672
2673 state->smb2.fixed = fixed;
2674 state->smb2.fixed_len = fixed_len;
2675 state->smb2.dyn = dyn;
2676 state->smb2.dyn_len = dyn_len;
2677 state->smb2.max_dyn_len = max_dyn_len;
2678
2679 if (state->smb2.should_encrypt) {
2680 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2681 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2682 }
2683
2684 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
2685 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
2686 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
2687 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
2688 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
2689 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
2690 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
2691 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
2692
2693 switch (cmd) {
2694 case SMB2_OP_CANCEL:
2695 state->one_way = true;
2696 break;
2697 case SMB2_OP_BREAK:
2698 /*
2699 * If this is a dummy request, it will have
2700 * UINT64_MAX as message id.
2701 * If we send on break acknowledgement,
2702 * this gets overwritten later.
2703 */
2704 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2705 break;
2706 }
2707
2708 if (timeout_msec > 0) {
2709 struct timeval endtime;
2710
2711 endtime = timeval_current_ofs_msec(timeout_msec);
2712 if (!tevent_req_set_endtime(req, ev, endtime)) {
2713 return req;
2714 }
2715 }
2716
2717 return req;
2718 }
2719
2720 void smb2cli_req_set_notify_async(struct tevent_req *req)
2721 {
2722 struct smbXcli_req_state *state =
2723 tevent_req_data(req,
2724 struct smbXcli_req_state);
2725
2726 state->smb2.notify_async = true;
2727 }
2728
2729 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2730 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2731 TALLOC_CTX *tmp_mem,
2732 uint8_t *inbuf);
2733
2734 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2735 int num_reqs)
2736 {
2737 struct smbXcli_req_state *state;
2738 struct tevent_req *subreq;
2739 struct iovec *iov;
2740 int i, num_iov, nbt_len;
2741 int tf_iov = -1;
2742 const DATA_BLOB *encryption_key = NULL;
2743 uint64_t encryption_session_id = 0;
2744
2745 /*
2746 * 1 for the nbt length, optional TRANSFORM
2747 * per request: HDR, fixed, dyn, padding
2748 * -1 because the last one does not need padding
2749 */
2750
2751 iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
2752 if (iov == NULL) {
2753 return NT_STATUS_NO_MEMORY;
2754 }
2755
2756 num_iov = 1;
2757 nbt_len = 0;
2758
2759 /*
2760 * the session of the first request that requires encryption
2761 * specifies the encryption key.
2762 */
2763 for (i=0; i<num_reqs; i++) {
2764 if (!tevent_req_is_in_progress(reqs[i])) {
2765 return NT_STATUS_INTERNAL_ERROR;
2766 }
2767
2768 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2769
2770 if (!smbXcli_conn_is_connected(state->conn)) {
2771 return NT_STATUS_CONNECTION_DISCONNECTED;
2772 }
2773
2774 if ((state->conn->protocol != PROTOCOL_NONE) &&
2775 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2776 return NT_STATUS_REVISION_MISMATCH;
2777 }
2778
2779 if (state->session == NULL) {
2780 continue;
2781 }
2782
2783 if (!state->smb2.should_encrypt) {
2784 continue;
2785 }
2786
2787 encryption_key = &state->session->smb2->encryption_key;
2788 if (encryption_key->length == 0) {
2789 return NT_STATUS_INVALID_PARAMETER_MIX;
2790 }
2791
2792 encryption_session_id = state->session->smb2->session_id;
2793
2794 tf_iov = num_iov;
2795 iov[num_iov].iov_base = state->smb2.transform;
2796 iov[num_iov].iov_len = sizeof(state->smb2.transform);
2797 num_iov += 1;
2798
2799 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2800 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
2801 state->session->smb2->nonce_low);
2802 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
2803 state->session->smb2->nonce_high);
2804 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
2805 encryption_session_id);
2806
2807 state->session->smb2->nonce_low += 1;
2808 if (state->session->smb2->nonce_low == 0) {
2809 state->session->smb2->nonce_high += 1;
2810 state->session->smb2->nonce_low += 1;
2811 }
2812
2813 nbt_len += SMB2_TF_HDR_SIZE;
2814 break;
2815 }
2816
2817 for (i=0; i<num_reqs; i++) {
2818 int hdr_iov;
2819 size_t reqlen;
2820 bool ret;
2821 uint16_t opcode;
2822 uint64_t avail;
2823 uint16_t charge;
2824 uint16_t credits;
2825 uint64_t mid;
2826 const DATA_BLOB *signing_key = NULL;
2827
2828 if (!tevent_req_is_in_progress(reqs[i])) {
2829 return NT_STATUS_INTERNAL_ERROR;
2830 }
2831
2832 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2833
2834 if (!smbXcli_conn_is_connected(state->conn)) {
2835 return NT_STATUS_CONNECTION_DISCONNECTED;
2836 }
2837
2838 if ((state->conn->protocol != PROTOCOL_NONE) &&
2839 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2840 return NT_STATUS_REVISION_MISMATCH;
2841 }
2842
2843 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2844 if (opcode == SMB2_OP_CANCEL) {
2845 goto skip_credits;
2846 }
2847
2848 avail = UINT64_MAX - state->conn->smb2.mid;
2849 if (avail < 1) {
2850 return NT_STATUS_CONNECTION_ABORTED;
2851 }
2852
2853 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2854 uint32_t max_dyn_len = 1;
2855
2856 max_dyn_len = MAX(max_dyn_len, state->smb2.dyn_len);
2857 max_dyn_len = MAX(max_dyn_len, state->smb2.max_dyn_len);
2858
2859 charge = (max_dyn_len - 1)/ 65536 + 1;
2860 } else {
2861 charge = 1;
2862 }
2863
2864 charge = MAX(state->smb2.credit_charge, charge);
2865
2866 avail = MIN(avail, state->conn->smb2.cur_credits);
2867 if (avail < charge) {
2868 return NT_STATUS_INTERNAL_ERROR;
2869 }
2870
2871 credits = 0;
2872 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
2873 credits = state->conn->smb2.max_credits -
2874 state->conn->smb2.cur_credits;
2875 }
2876 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
2877 credits += 1;
2878 }
2879
2880 mid = state->conn->smb2.mid;
2881 state->conn->smb2.mid += charge;
2882 state->conn->smb2.cur_credits -= charge;
2883
2884 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2885 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
2886 }
2887 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
2888 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2889
2890 skip_credits:
2891 if (state->session && encryption_key == NULL) {
2892 /*
2893 * We prefer the channel signing key if it is
2894 * already there.
2895 */
2896 if (state->smb2.should_sign) {
2897 signing_key = &state->session->smb2_channel.signing_key;
2898 }
2899
2900 /*
2901 * If it is a channel binding, we already have the main
2902 * signing key and try that one.
2903 */
2904 if (signing_key && signing_key->length == 0) {
2905 signing_key = &state->session->smb2->signing_key;
2906 }
2907
2908 /*
2909 * If we do not have any session key yet, we skip the
2910 * signing of SMB2_OP_SESSSETUP requests.
2911 */
2912 if (signing_key && signing_key->length == 0) {
2913 signing_key = NULL;
2914 }
2915 }
2916
2917 hdr_iov = num_iov;
2918 iov[num_iov].iov_base = state->smb2.hdr;
2919 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
2920 num_iov += 1;
2921
2922 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2923 iov[num_iov].iov_len = state->smb2.fixed_len;
2924 num_iov += 1;
2925
2926 if (state->smb2.dyn != NULL) {
2927 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2928 iov[num_iov].iov_len = state->smb2.dyn_len;
2929 num_iov += 1;
2930 }
2931
2932 reqlen = sizeof(state->smb2.hdr);
2933 reqlen += state->smb2.fixed_len;
2934 reqlen += state->smb2.dyn_len;
2935
2936 if (i < num_reqs-1) {
2937 if ((reqlen % 8) > 0) {
2938 uint8_t pad = 8 - (reqlen % 8);
2939 iov[num_iov].iov_base = state->smb2.pad;
2940 iov[num_iov].iov_len = pad;
2941 num_iov += 1;
2942 reqlen += pad;
2943 }
2944 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
2945 }
2946
2947 state->smb2.encryption_session_id = encryption_session_id;
2948
2949 if (signing_key != NULL) {
2950 NTSTATUS status;
2951
2952 status = smb2_signing_sign_pdu(*signing_key,
2953 state->session->conn->protocol,
2954 &iov[hdr_iov], num_iov - hdr_iov);
2955 if (!NT_STATUS_IS_OK(status)) {
2956 return status;
2957 }
2958 }
2959
2960 nbt_len += reqlen;
2961
2962 ret = smbXcli_req_set_pending(reqs[i]);
2963 if (!ret) {
2964 return NT_STATUS_NO_MEMORY;
2965 }
2966 }
2967
2968 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
2969 _smb_setlen_tcp(state->length_hdr, nbt_len);
2970 iov[0].iov_base = state->length_hdr;
2971 iov[0].iov_len = sizeof(state->length_hdr);
2972
2973 if (encryption_key != NULL) {
2974 NTSTATUS status;
2975 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
2976 uint8_t *buf;
2977 int vi;
2978
2979 buf = talloc_array(iov, uint8_t, buflen);
2980 if (buf == NULL) {
2981 return NT_STATUS_NO_MEMORY;
2982 }
2983
2984 /*
2985 * We copy the buffers before encrypting them,
2986 * this is at least currently needed for the
2987 * to keep state->smb2.hdr.
2988 *
2989 * Also the callers may expect there buffers
2990 * to be const.
2991 */
2992 for (vi = tf_iov + 1; vi < num_iov; vi++) {
2993 struct iovec *v = &iov[vi];
2994 const uint8_t *o = (const uint8_t *)v->iov_base;
2995
2996 memcpy(buf, o, v->iov_len);
2997 v->iov_base = (void *)buf;
2998 buf += v->iov_len;
2999 }
3000
3001 status = smb2_signing_encrypt_pdu(*encryption_key,
3002 state->conn->protocol,
3003 &iov[tf_iov], num_iov - tf_iov);
3004 if (!NT_STATUS_IS_OK(status)) {
3005 return status;
3006 }
3007 }
3008
3009 if (state->conn->dispatch_incoming == NULL) {
3010 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3011 }
3012
3013 subreq = writev_send(state, state->ev, state->conn->outgoing,
3014 state->conn->write_fd, false, iov, num_iov);
3015 if (subreq == NULL) {
3016 return NT_STATUS_NO_MEMORY;
3017 }
3018 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
3019 return NT_STATUS_OK;
3020 }
3021
3022 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
3023 {
3024 struct smbXcli_req_state *state =
3025 tevent_req_data(req,
3026 struct smbXcli_req_state);
3027
3028 state->smb2.credit_charge = charge;
3029 }
3030
3031 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
3032 struct tevent_context *ev,
3033 struct smbXcli_conn *conn,
3034 uint16_t cmd,
3035 uint32_t additional_flags,
3036 uint32_t clear_flags,
3037 uint32_t timeout_msec,
3038 struct smbXcli_tcon *tcon,
3039 struct smbXcli_session *session,
3040 const uint8_t *fixed,
3041 uint16_t fixed_len,
3042 const uint8_t *dyn,
3043 uint32_t dyn_len,
3044 uint32_t max_dyn_len)
3045 {
3046 struct tevent_req *req;
3047 NTSTATUS status;
3048
3049 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
3050 additional_flags, clear_flags,
3051 timeout_msec,
3052 tcon, session,
3053 fixed, fixed_len,
3054 dyn, dyn_len,
3055 max_dyn_len);
3056 if (req == NULL) {
3057 return NULL;
3058 }
3059 if (!tevent_req_is_in_progress(req)) {
3060 return tevent_req_post(req, ev);
3061 }
3062 status = smb2cli_req_compound_submit(&req, 1);
3063 if (tevent_req_nterror(req, status)) {
3064 return tevent_req_post(req, ev);
3065 }
3066 return req;
3067 }
3068
3069 static void smb2cli_req_writev_done(struct tevent_req *subreq)
3070 {
3071 struct tevent_req *req =
3072 tevent_req_callback_data(subreq,
3073 struct tevent_req);
3074 struct smbXcli_req_state *state =
3075 tevent_req_data(req,
3076 struct smbXcli_req_state);
3077 ssize_t nwritten;
3078 int err;
3079
3080 nwritten = writev_recv(subreq, &err);
3081 TALLOC_FREE(subreq);
3082 if (nwritten == -1) {
3083 /* here, we need to notify all pending requests */
3084 NTSTATUS status = map_nt_error_from_unix_common(err);
3085 smbXcli_conn_disconnect(state->conn, status);
3086 return;
3087 }
3088 }
3089
3090 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3091 uint8_t *buf,
3092 size_t buflen,
3093 TALLOC_CTX *mem_ctx,
3094 struct iovec **piov, int *pnum_iov)
3095 {
3096 struct iovec *iov;
3097 int num_iov = 0;
3098 size_t taken = 0;
3099 uint8_t *first_hdr = buf;
3100 size_t verified_buflen = 0;
3101 uint8_t *tf = NULL;
3102 size_t tf_len = 0;
3103
3104 iov = talloc_array(mem_ctx, struct iovec, num_iov);
3105 if (iov == NULL) {
3106 return NT_STATUS_NO_MEMORY;
3107 }
3108
3109 while (taken < buflen) {
3110 size_t len = buflen - taken;
3111 uint8_t *hdr = first_hdr + taken;
3112 struct iovec *cur;
3113 size_t full_size;
3114 size_t next_command_ofs;
3115 uint16_t body_size;
3116 struct iovec *iov_tmp;
3117
3118 if (verified_buflen > taken) {
3119 len = verified_buflen - taken;
3120 } else {
3121 tf = NULL;
3122 tf_len = 0;
3123 }
3124
3125 if (len < 4) {
3126 DEBUG(10, ("%d bytes left, expected at least %d\n",
3127 (int)len, 4));
3128 goto inval;
3129 }
3130 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3131 struct smbXcli_session *s;
3132 uint64_t uid;
3133 struct iovec tf_iov[2];
3134 size_t enc_len;
3135 NTSTATUS status;
3136
3137 if (len < SMB2_TF_HDR_SIZE) {
3138 DEBUG(10, ("%d bytes left, expected at least %d\n",
3139 (int)len, SMB2_TF_HDR_SIZE));
3140 goto inval;
3141 }
3142 tf = hdr;
3143 tf_len = SMB2_TF_HDR_SIZE;
3144 taken += tf_len;
3145
3146 hdr = first_hdr + taken;
3147 enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3148 uid = BVAL(tf, SMB2_TF_SESSION_ID);
3149
3150 if (len < SMB2_TF_HDR_SIZE + enc_len) {
3151 DEBUG(10, ("%d bytes left, expected at least %d\n",
3152 (int)len,
3153 (int)(SMB2_TF_HDR_SIZE + enc_len)));
3154 goto inval;
3155 }
3156
3157 s = conn->sessions;
3158 for (; s; s = s->next) {
3159 if (s->smb2->session_id != uid) {
3160 continue;
3161 }
3162 break;
3163 }
3164
3165 if (s == NULL) {
3166 DEBUG(10, ("unknown session_id %llu\n",
3167 (unsigned long long)uid));
3168 goto inval;
3169 }
3170
3171 tf_iov[0].iov_base = (void *)tf;
3172 tf_iov[0].iov_len = tf_len;
3173 tf_iov[1].iov_base = (void *)hdr;
3174 tf_iov[1].iov_len = enc_len;
3175
3176 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3177 conn->protocol,
3178 tf_iov, 2);
3179 if (!NT_STATUS_IS_OK(status)) {
3180 TALLOC_FREE(iov);
3181 return status;
3182 }
3183
3184 verified_buflen = taken + enc_len;
3185 len = enc_len;
3186 }
3187
3188 /*
3189 * We need the header plus the body length field
3190 */
3191
3192 if (len < SMB2_HDR_BODY + 2) {
3193 DEBUG(10, ("%d bytes left, expected at least %d\n",
3194 (int)len, SMB2_HDR_BODY));
3195 goto inval;
3196 }
3197 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3198 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3199 IVAL(hdr, 0)));
3200 goto inval;
3201 }
3202 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3203 DEBUG(10, ("Got HDR len %d, expected %d\n",
3204 SVAL(hdr, 4), SMB2_HDR_BODY));
3205 goto inval;
3206 }
3207
3208 full_size = len;
3209 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3210 body_size = SVAL(hdr, SMB2_HDR_BODY);
3211
3212 if (next_command_ofs != 0) {
3213 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3214 goto inval;
3215 }
3216 if (next_command_ofs > full_size) {
3217 goto inval;
3218 }
3219 full_size = next_command_ofs;
3220 }
3221 if (body_size < 2) {
3222 goto inval;
3223 }
3224 body_size &= 0xfffe;
3225
3226 if (body_size > (full_size - SMB2_HDR_BODY)) {
3227 goto inval;
3228 }
3229
3230 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3231 num_iov + 4);
3232 if (iov_tmp == NULL) {
3233 TALLOC_FREE(iov);
3234 return NT_STATUS_NO_MEMORY;
3235 }
3236 iov = iov_tmp;
3237 cur = &iov[num_iov];
3238 num_iov += 4;
3239
3240 cur[0].iov_base = tf;
3241 cur[0].iov_len = tf_len;
3242 cur[1].iov_base = hdr;
3243 cur[1].iov_len = SMB2_HDR_BODY;
3244 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3245 cur[2].iov_len = body_size;
3246 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3247 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3248
3249 taken += full_size;
3250 }
3251
3252 *piov = iov;
3253 *pnum_iov = num_iov;
3254 return NT_STATUS_OK;
3255
3256 inval:
3257 TALLOC_FREE(iov);
3258 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3259 }
3260
3261 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3262 uint64_t mid)
3263 {
3264 size_t num_pending = talloc_array_length(conn->pending);
3265 size_t i;
3266
3267 for (i=0; i<num_pending; i++) {
3268 struct tevent_req *req = conn->pending[i];
3269 struct smbXcli_req_state *state =
3270 tevent_req_data(req,
3271 struct smbXcli_req_state);
3272
3273 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3274 return req;
3275 }
3276 }
3277 return NULL;
3278 }
3279
3280 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3281 TALLOC_CTX *tmp_mem,
3282 uint8_t *inbuf)
3283 {
3284 struct tevent_req *req;
3285 struct smbXcli_req_state *state = NULL;
3286 struct iovec *iov;
3287 int i, num_iov;
3288 NTSTATUS status;
3289 bool defer = true;
3290 struct smbXcli_session *last_session = NULL;
3291 size_t inbuf_len = smb_len_tcp(inbuf);
3292
3293 status = smb2cli_inbuf_parse_compound(conn,
3294 inbuf + NBT_HDR_SIZE,
3295 inbuf_len,
3296 tmp_mem,
3297 &iov, &num_iov);
3298 if (!NT_STATUS_IS_OK(status)) {
3299 return status;
3300 }
3301
3302 for (i=0; i<num_iov; i+=4) {
3303 uint8_t *inbuf_ref = NULL;
3304 struct iovec *cur = &iov[i];
3305 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3306 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3307 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3308 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3309 uint16_t req_opcode;
3310 uint32_t req_flags;
3311 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3312 uint32_t new_credits;
3313 struct smbXcli_session *session = NULL;
3314 const DATA_BLOB *signing_key = NULL;
3315 bool was_encrypted = false;
3316
3317 new_credits = conn->smb2.cur_credits;
3318 new_credits += credits;
3319 if (new_credits > UINT16_MAX) {
3320 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3321 }
3322 conn->smb2.cur_credits += credits;
3323
3324 req = smb2cli_conn_find_pending(conn, mid);
3325 if (req == NULL) {
3326 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3327 }
3328 state = tevent_req_data(req, struct smbXcli_req_state);
3329
3330 state->smb2.got_async = false;
3331
3332 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3333 if (opcode != req_opcode) {
3334 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3335 }
3336 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3337
3338 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3339 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3340 }
3341
3342 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3343 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3344 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3345 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3346
3347 /*
3348 * async interim responses are not signed,
3349 * even if the SMB2_HDR_FLAG_SIGNED flag
3350 * is set.
3351 */
3352 req_flags |= SMB2_HDR_FLAG_ASYNC;
3353 SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
3354 SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
3355
3356 if (state->smb2.notify_async) {
3357 state->smb2.got_async = true;
3358 tevent_req_defer_callback(req, state->ev);
3359 tevent_req_notify_callback(req);
3360 }
3361 continue;
3362 }
3363
3364 session = state->session;
3365 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3366 session = last_session;
3367 }
3368 last_session = session;
3369
3370 if (state->smb2.should_sign) {
3371 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3372 return NT_STATUS_ACCESS_DENIED;
3373 }
3374 }
3375
3376 if (flags & SMB2_HDR_FLAG_SIGNED) {
3377 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3378
3379 if (session == NULL) {
3380 struct smbXcli_session *s;
3381
3382 s = state->conn->sessions;
3383 for (; s; s = s->next) {
3384 if (s->smb2->session_id != uid) {
3385 continue;
3386 }
3387
3388 session = s;
3389 break;
3390 }
3391 }
3392
3393 if (session == NULL) {
3394 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3395 }
3396
3397 last_session = session;
3398 signing_key = &session->smb2_channel.signing_key;
3399 }
3400
3401 if (opcode == SMB2_OP_SESSSETUP) {
3402 /*
3403 * We prefer the channel signing key, if it is
3404 * already there.
3405 *
3406 * If we do not have a channel signing key yet,
3407 * we try the main signing key, if it is not
3408 * the final response.
3409 */
3410 if (signing_key && signing_key->length == 0 &&
3411 !NT_STATUS_IS_OK(status)) {
3412 signing_key = &session->smb2->signing_key;
3413 }
3414
3415 if (signing_key && signing_key->length == 0) {
3416 /*
3417 * If we do not have a session key to
3418 * verify the signature, we defer the
3419 * signing check to the caller.
3420 *
3421 * The caller gets NT_STATUS_OK, it
3422 * has to call
3423 * smb2cli_session_set_session_key()
3424 * or
3425 * smb2cli_session_set_channel_key()
3426 * which will check the signature
3427 * with the channel signing key.
3428 */
3429 signing_key = NULL;
3430 }
3431 }
3432
3433 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3434 const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3435 uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3436
3437 /*
3438 * If the response was encrypted in a SMB2_TRANSFORM
3439 * pdu, which belongs to the correct session,
3440 * we do not need to do signing checks
3441 *
3442 * It could be the session the response belongs to
3443 * or the session that was used to encrypt the
3444 * SMB2_TRANSFORM request.
3445 */
3446 if ((session && session->smb2->session_id == uid) ||
3447 (state->smb2.encryption_session_id == uid)) {
3448 signing_key = NULL;
3449 was_encrypted = true;
3450 }
3451 }
3452
3453 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3454 /*
3455 * if the server returns NT_STATUS_USER_SESSION_DELETED
3456 * the response is not signed and we should
3457 * propagate the NT_STATUS_USER_SESSION_DELETED
3458 * status to the caller.
3459 */
3460 state->smb2.signing_skipped = true;
3461 signing_key = NULL;
3462 }
3463
3464 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3465 /*
3466 * if the server returns
3467 * NT_STATUS_INVALID_PARAMETER
3468 * the response might not be encrypted.
3469 */
3470 if (state->smb2.should_encrypt && !was_encrypted) {
3471 state->smb2.signing_skipped = true;
3472 signing_key = NULL;
3473 }
3474 }
3475
3476 if (state->smb2.should_encrypt && !was_encrypted) {
3477 if (!state->smb2.signing_skipped) {
3478 return NT_STATUS_ACCESS_DENIED;
3479 }
3480 }
3481
3482 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3483 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3484 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3485 /*
3486 * if the server returns
3487 * NT_STATUS_NETWORK_NAME_DELETED
3488 * NT_STATUS_FILE_CLOSED
3489 * NT_STATUS_INVALID_PARAMETER
3490 * the response might not be signed
3491 * as this happens before the signing checks.
3492 *
3493 * If server echos the signature (or all zeros)
3494 * we should report the status from the server
3495 * to the caller.
3496 */
3497 if (signing_key) {
3498 int cmp;
3499
3500 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3501 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3502 16);
3503 if (cmp == 0) {
3504 state->smb2.signing_skipped = true;
3505 signing_key = NULL;
3506 }
3507 }
3508 if (signing_key) {
3509 int cmp;
3510 static const uint8_t zeros[16];
3511
3512 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3513 zeros,
3514 16);
3515 if (cmp == 0) {
3516 state->smb2.signing_skipped = true;
3517 signing_key = NULL;
3518 }
3519 }
3520 }
3521
3522 if (signing_key) {
3523 status = smb2_signing_check_pdu(*signing_key,
3524 state->conn->protocol,
3525 &cur[1], 3);
3526 if (!NT_STATUS_IS_OK(status)) {
3527 /*
3528 * If the signing check fails, we disconnect
3529 * the connection.
3530 */
3531 return status;
3532 }
3533 }
3534
3535 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
3536 (session != NULL) && session->disconnect_expired)
3537 {
3538 /*
3539 * this should be a short term hack
3540 * until the upper layers have implemented
3541 * re-authentication.
3542 */
3543 return status;
3544 }
3545
3546 smbXcli_req_unset_pending(req);
3547
3548 /*
3549 * There might be more than one response
3550 * we need to defer the notifications
3551 */
3552 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3553 defer = false;
3554 }
3555
3556 if (defer) {
3557 tevent_req_defer_callback(req, state->ev);
3558 }
3559
3560 /*
3561 * Note: here we use talloc_reference() in a way
3562 * that does not expose it to the caller.
3563 */
3564 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3565 if (tevent_req_nomem(inbuf_ref, req)) {
3566 continue;
3567 }
3568
3569 /* copy the related buffers */
3570 state->smb2.recv_iov[0] = cur[1];
3571 state->smb2.recv_iov[1] = cur[2];
3572 state->smb2.recv_iov[2] = cur[3];
3573
3574 tevent_req_done(req);
3575 }
3576
3577 if (defer) {
3578 return NT_STATUS_RETRY;
3579 }
3580
3581 return NT_STATUS_OK;
3582 }
3583
3584 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3585 struct iovec **piov,
3586 const struct smb2cli_req_expected_response *expected,
3587 size_t num_expected)
3588 {
3589 struct smbXcli_req_state *state =
3590 tevent_req_data(req,
3591 struct smbXcli_req_state);
3592 NTSTATUS status;
3593 size_t body_size;
3594 bool found_status = false;
3595 bool found_size = false;
3596 size_t i;
3597
3598 if (piov != NULL) {
3599 *piov = NULL;
3600 }
3601
3602 if (state->smb2.got_async) {
3603 return STATUS_PENDING;
3604 }
3605
3606 if (tevent_req_is_nterror(req, &status)) {
3607 for (i=0; i < num_expected; i++) {
3608 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3609 found_status = true;
3610 break;
3611 }
3612 }
3613
3614 if (found_status) {
3615 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3616 }
3617
3618 return status;
3619 }
3620
3621 if (num_expected == 0) {
3622 found_status = true;
3623 found_size = true;
3624 }
3625
3626 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3627 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3628
3629 for (i=0; i < num_expected; i++) {
3630 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3631 continue;
3632 }
3633
3634 found_status = true;
3635 if (expected[i].body_size == 0) {
3636 found_size = true;
3637 break;
3638 }
3639
3640 if (expected[i].body_size == body_size) {
3641 found_size = true;
3642 break;
3643 }
3644 }
3645
3646 if (!found_status) {
3647 return status;
3648 }
3649
3650 if (state->smb2.signing_skipped) {
3651 if (num_expected > 0) {
3652 return NT_STATUS_ACCESS_DENIED;
3653 }
3654 if (!NT_STATUS_IS_ERR(status)) {
3655 return NT_STATUS_ACCESS_DENIED;
3656 }
3657 }
3658
3659 if (!found_size) {
3660 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3661 }
3662
3663 if (piov != NULL) {
3664 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3665 }
3666
3667 return status;
3668 }
3669
3670 static const struct {
3671 enum protocol_types proto;
3672 const char *smb1_name;
3673 } smb1cli_prots[] = {
3674 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
3675 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
3676 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
3677 {PROTOCOL_LANMAN1, "LANMAN1.0"},
3678 {PROTOCOL_LANMAN2, "LM1.2X002"},
3679 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
3680 {PROTOCOL_LANMAN2, "LANMAN2.1"},
3681 {PROTOCOL_LANMAN2, "Samba"},
3682 {PROTOCOL_NT1, "NT LANMAN 1.0"},
3683 {PROTOCOL_NT1, "NT LM 0.12"},
3684 {PROTOCOL_SMB2_02, "SMB 2.002"},
3685 {PROTOCOL_SMB2_10, "SMB 2.???"},
3686 };
3687
3688 static const struct {
3689 enum protocol_types proto;
3690 uint16_t smb2_dialect;
3691 } smb2cli_prots[] = {
3692 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
3693 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
3694 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
3695 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
3696 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
3697 {PROTOCOL_SMB3_02, SMB3_DIALECT_REVISION_302},
3698 };
3699
3700 struct smbXcli_negprot_state {
3701 struct smbXcli_conn *conn;
3702 struct tevent_context *ev;
3703 uint32_t timeout_msec;
3704 enum protocol_types min_protocol;
3705 enum protocol_types max_protocol;
3706
3707 struct {
3708 uint8_t fixed[36];
3709 uint8_t dyn[ARRAY_SIZE(smb2cli_prots)*2];
3710 } smb2;
3711 };
3712
3713 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3714 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3715 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3716 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3717 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3718 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3719 TALLOC_CTX *frame,
3720 uint8_t *inbuf);
3721
3722 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3723 struct tevent_context *ev,
3724 struct smbXcli_conn *conn,
3725 uint32_t timeout_msec,
3726 enum protocol_types min_protocol,
3727 enum protocol_types max_protocol)
3728 {
3729 struct tevent_req *req, *subreq;
3730 struct smbXcli_negprot_state *state;
3731
3732 req = tevent_req_create(mem_ctx, &state,
3733 struct smbXcli_negprot_state);
3734 if (req == NULL) {
3735 return NULL;
3736 }
3737 state->conn = conn;
3738 state->ev = ev;
3739 state->timeout_msec = timeout_msec;
3740 state->min_protocol = min_protocol;
3741 state->max_protocol = max_protocol;
3742
3743 if (min_protocol == PROTOCOL_NONE) {
3744 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3745 return tevent_req_post(req, ev);
3746 }
3747
3748 if (max_protocol == PROTOCOL_NONE) {
3749 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3750 return tevent_req_post(req, ev);
3751 }
3752
3753 if (min_protocol > max_protocol) {
3754 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3755 return tevent_req_post(req, ev);
3756 }
3757
3758 if ((min_protocol < PROTOCOL_SMB2_02) &&
3759 (max_protocol < PROTOCOL_SMB2_02)) {
3760 /*
3761 * SMB1 only...
3762 */
3763 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3764
3765 subreq = smbXcli_negprot_smb1_subreq(state);
3766 if (tevent_req_nomem(subreq, req)) {
3767 return tevent_req_post(req, ev);
3768 }
3769 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3770 return req;
3771 }
3772
3773 if ((min_protocol >= PROTOCOL_SMB2_02) &&
3774 (max_protocol >= PROTOCOL_SMB2_02)) {
3775 /*
3776 * SMB2 only...
3777 */
3778 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3779
3780 subreq = smbXcli_negprot_smb2_subreq(state);
3781 if (tevent_req_nomem(subreq, req)) {
3782 return tevent_req_post(req, ev);
3783 }
3784 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3785 return req;
3786 }
3787
3788 /*
3789 * We send an SMB1 negprot with the SMB2 dialects
3790 * and expect a SMB1 or a SMB2 response.
3791 *
3792 * smbXcli_negprot_dispatch_incoming() will fix the
3793 * callback to match protocol of the response.
3794 */
3795 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
3796
3797 subreq = smbXcli_negprot_smb1_subreq(state);
3798 if (tevent_req_nomem(subreq, req)) {
3799 return tevent_req_post(req, ev);
3800 }
3801 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
3802 return req;
3803 }
3804
3805 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
3806 {
3807 struct tevent_req *req =
3808 tevent_req_callback_data(subreq,
3809 struct tevent_req);
3810 NTSTATUS status;
3811
3812 /*
3813 * we just want the low level error
3814 */
3815 status = tevent_req_simple_recv_ntstatus(subreq);
3816 TALLOC_FREE(subreq);
3817 if (tevent_req_nterror(req, status)) {
3818 return;
3819 }
3820
3821 /* this should never happen */
3822 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
3823 }
3824
3825 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
3826 {
3827 size_t i;
3828 DATA_BLOB bytes = data_blob_null;
3829 uint8_t flags;
3830 uint16_t flags2;
3831
3832 /* setup the protocol strings */
3833 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3834 uint8_t c = 2;
3835 bool ok;
3836
3837 if (smb1cli_prots[i].proto < state->min_protocol) {
3838 continue;
3839 }
3840
3841 if (smb1cli_prots[i].proto > state->max_protocol) {
3842 continue;
3843 }
3844
3845 ok = data_blob_append(state, &bytes, &c, sizeof(c));
3846 if (!ok) {
3847 return NULL;
3848 }
3849
3850 /*
3851 * We now it is already ascii and
3852 * we want NULL termination.
3853 */
3854 ok = data_blob_append(state, &bytes,
3855 smb1cli_prots[i].smb1_name,
3856 strlen(smb1cli_prots[i].smb1_name)+1);
3857 if (!ok) {
3858 return NULL;
3859 }
3860 }
3861
3862 smb1cli_req_flags(state->max_protocol,
3863 state->conn->smb1.client.capabilities,
3864 SMBnegprot,
3865 0, 0, &flags,
3866 0, 0, &flags2);
3867
3868 return smb1cli_req_send(state, state->ev, state->conn,
3869 SMBnegprot,
3870 flags, ~flags,
3871 flags2, ~flags2,
3872 state->timeout_msec,
3873 0xFFFE, 0, NULL, /* pid, tid, session */
3874 0, NULL, /* wct, vwv */
3875 bytes.length, bytes.data);
3876 }
3877
3878 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
3879 {
3880 struct tevent_req *req =
3881 tevent_req_callback_data(subreq,
3882 struct tevent_req);
3883 struct smbXcli_negprot_state *state =
3884 tevent_req_data(req,
3885 struct smbXcli_negprot_state);
3886 struct smbXcli_conn *conn = state->conn;
3887 struct iovec *recv_iov = NULL;
3888 uint8_t *inhdr;
3889 uint8_t wct;
3890 uint16_t *vwv;
3891 uint32_t num_bytes;
3892 uint8_t *bytes;
3893 NTSTATUS status;
3894 uint16_t protnum;
3895 size_t i;
3896 size_t num_prots = 0;
3897 uint8_t flags;
3898 uint32_t client_capabilities = conn->smb1.client.capabilities;
3899 uint32_t both_capabilities;
3900 uint32_t server_capabilities = 0;
3901 uint32_t capabilities;
3902 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
3903 uint32_t server_max_xmit = 0;
3904 uint32_t max_xmit;
3905 uint32_t server_max_mux = 0;
3906 uint16_t server_security_mode = 0;
3907 uint32_t server_session_key = 0;
3908 bool server_readbraw = false;
3909 bool server_writebraw = false;
3910 bool server_lockread = false;
3911 bool server_writeunlock = false;
3912 struct GUID server_guid = GUID_zero();
3913 DATA_BLOB server_gss_blob = data_blob_null;
3914 uint8_t server_challenge[8];
3915 char *server_workgroup = NULL;
3916 char *server_name = NULL;
3917 int server_time_zone = 0;
3918 NTTIME server_system_time = 0;
3919 static const struct smb1cli_req_expected_response expected[] = {
3920 {
3921 .status = NT_STATUS_OK,
3922 .wct = 0x11, /* NT1 */
3923 },
3924 {
3925 .status = NT_STATUS_OK,
3926 .wct = 0x0D, /* LM */
3927 },
3928 {
3929 .status = NT_STATUS_OK,
3930 .wct = 0x01, /* CORE */
3931 }
3932 };
3933
3934 ZERO_STRUCT(server_challenge);
3935
3936 status = smb1cli_req_recv(subreq, state,
3937 &recv_iov,
3938 &inhdr,
3939 &wct,
3940 &vwv,
3941 NULL, /* pvwv_offset */
3942 &num_bytes,
3943 &bytes,
3944 NULL, /* pbytes_offset */
3945 NULL, /* pinbuf */
3946 expected, ARRAY_SIZE(expected));
3947 TALLOC_FREE(subreq);
3948 if (tevent_req_nterror(req, status)) {
3949 return;
3950 }
3951
3952 flags = CVAL(inhdr, HDR_FLG);
3953
3954 protnum = SVAL(vwv, 0);
3955
3956 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3957 if (smb1cli_prots[i].proto < state->min_protocol) {
3958 continue;
3959 }
3960
3961 if (smb1cli_prots[i].proto > state->max_protocol) {
3962 continue;
3963 }
3964
3965 if (protnum != num_prots) {
3966 num_prots++;
3967 continue;
3968 }
3969
3970 conn->protocol = smb1cli_prots[i].proto;
3971 break;
3972 }
3973
3974 if (conn->protocol == PROTOCOL_NONE) {
3975 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3976 return;
3977 }
3978
3979 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
3980 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
3981 "and the selected protocol level doesn't support it.\n"));
3982 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3983 return;
3984 }
3985
3986 if (flags & FLAG_SUPPORT_LOCKREAD) {
3987 server_lockread = true;
3988 server_writeunlock = true;
3989 }
3990
3991 if (conn->protocol >= PROTOCOL_NT1) {
3992 const char *client_signing = NULL;
3993 bool server_mandatory = false;
3994 bool server_allowed = false;
3995 const char *server_signing = NULL;
3996 bool ok;
3997 uint8_t key_len;
3998
3999 if (wct != 0x11) {
4000 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4001 return;
4002 }
4003
4004 /* NT protocol */
4005 server_security_mode = CVAL(vwv + 1, 0);
4006 server_max_mux = SVAL(vwv + 1, 1);
4007 server_max_xmit = IVAL(vwv + 3, 1);
4008 server_session_key = IVAL(vwv + 7, 1);
4009 server_time_zone = SVALS(vwv + 15, 1);
4010 server_time_zone *= 60;
4011 /* this time arrives in real GMT */
4012 server_system_time = BVAL(vwv + 11, 1);
4013 server_capabilities = IVAL(vwv + 9, 1);
4014
4015 key_len = CVAL(vwv + 16, 1);
4016
4017 if (server_capabilities & CAP_RAW_MODE) {
4018 server_readbraw = true;
4019 server_writebraw = true;
4020 }
4021 if (server_capabilities & CAP_LOCK_AND_READ) {
4022 server_lockread = true;
4023 }
4024
4025 if (server_capabilities & CAP_EXTENDED_SECURITY) {
4026 DATA_BLOB blob1, blob2;
4027
4028 if (num_bytes < 16) {
4029 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4030 return;
4031 }
4032
4033 blob1 = data_blob_const(bytes, 16);
4034 status = GUID_from_data_blob(&blob1, &server_guid);
4035 if (tevent_req_nterror(req, status)) {
4036 return;
4037 }
4038
4039 blob1 = data_blob_const(bytes+16, num_bytes-16);
4040 blob2 = data_blob_dup_talloc(state, blob1);
4041 if (blob1.length > 0 &&
4042 tevent_req_nomem(blob2.data, req)) {
4043 return;
4044 }
4045 server_gss_blob = blob2;
4046 } else {
4047 DATA_BLOB blob1, blob2;
4048
4049 if (num_bytes < key_len) {
4050 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4051 return;
4052 }
4053
4054 if (key_len != 0 && key_len != 8) {
4055 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4056 return;
4057 }
4058
4059 if (key_len == 8) {
4060 memcpy(server_challenge, bytes, 8);
4061 }
4062
4063 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4064 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
4065 if (blob1.length > 0) {
4066 size_t len;
4067
4068 len = utf16_len_n(blob1.data,
4069 blob1.length);
4070 blob1.length = len;
4071
4072 ok = convert_string_talloc(state,
4073 CH_UTF16LE,
4074 CH_UNIX,
4075 blob1.data,
4076 blob1.length,
4077 &server_workgroup,
4078 &len);
4079 if (!ok) {
4080 status = map_nt_error_from_unix_common(errno);
4081 tevent_req_nterror(req, status);
4082 return;
4083 }
4084 }
4085
4086 blob2.data += blob1.length;
4087 blob2.length -= blob1.length;
4088 if (blob2.length > 0) {
4089 size_t len;
4090
4091 len = utf16_len_n(blob1.data,
4092 blob1.length);
4093 blob1.length = len;
4094
4095 ok = convert_string_talloc(state,
4096 CH_UTF16LE,
4097 CH_UNIX,
4098 blob2.data,
4099 blob2.length,
4100 &server_name,
4101 &len);
4102 if (!ok) {
4103 status = map_nt_error_from_unix_common(errno);
4104 tevent_req_nterror(req, status);
4105 return;
4106 }
4107 }
4108 }
4109
4110 client_signing = "disabled";
4111 if (conn->allow_signing) {
4112 client_signing = "allowed";
4113 }
4114 if (conn->mandatory_signing) {
4115 client_signing = "required";
4116 }
4117
4118 server_signing = "not supported";
4119 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4120 server_signing = "supported";
4121 server_allowed = true;
4122 } else if (conn->mandatory_signing) {
4123 /*
4124 * We have mandatory signing as client
4125 * lets assume the server will look at our
4126 * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4127 * flag in the session setup
4128 */
4129 server_signing = "not announced";
4130 server_allowed = true;
4131 }
4132 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4133 server_signing = "required";
4134 server_mandatory = true;
4135 }
4136
4137 ok = smb_signing_set_negotiated(conn->smb1.signing,
4138 server_allowed,
4139 server_mandatory);
4140 if (!ok) {
4141 DEBUG(1,("cli_negprot: SMB signing is required, "
4142 "but client[%s] and server[%s] mismatch\n",
4143 client_signing, server_signing));
4144 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4145 return;
4146 }
4147
4148 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4149 DATA_BLOB blob1;
4150 uint8_t key_len;
4151 time_t t;
4152
4153 if (wct != 0x0D) {
4154 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4155 return;
4156 }
4157
4158 server_security_mode = SVAL(vwv + 1, 0);
4159 server_max_xmit = SVAL(vwv + 2, 0);
4160 server_max_mux = SVAL(vwv + 3, 0);
4161 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4162 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4163 server_session_key = IVAL(vwv + 6, 0);
4164 server_time_zone = SVALS(vwv + 10, 0);
4165 server_time_zone *= 60;
4166 /* this time is converted to GMT by make_unix_date */
4167 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4168 unix_to_nt_time(&server_system_time, t);
4169 key_len = SVAL(vwv + 11, 0);
4170
4171 if (num_bytes < key_len) {
4172 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4173 return;
4174 }
4175
4176 if (key_len != 0 && key_len != 8) {
4177 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4178 return;
4179 }
4180
4181 if (key_len == 8) {
4182 memcpy(server_challenge, bytes, 8);
4183 }
4184
4185 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4186 if (blob1.length > 0) {
4187 size_t len;
4188 bool ok;
4189
4190 len = utf16_len_n(blob1.data,
4191 blob1.length);
4192 blob1.length = len;
4193
4194 ok = convert_string_talloc(state,
4195 CH_DOS,
4196 CH_UNIX,
4197 blob1.data,
4198 blob1.length,
4199 &server_workgroup,
4200 &len);
4201 if (!ok) {
4202 status = map_nt_error_from_unix_common(errno);
4203 tevent_req_nterror(req, status);
4204 return;
4205 }
4206 }
4207
4208 } else {
4209 /* the old core protocol */
4210 server_time_zone = get_time_zone(time(NULL));
4211 server_max_xmit = 1024;
4212 server_max_mux = 1;
4213 }
4214
4215 if (server_max_xmit < 1024) {
4216 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4217 return;
4218 }
4219
4220 if (server_max_mux < 1) {
4221 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4222 return;
4223 }
4224
4225 /*
4226 * Now calculate the negotiated capabilities
4227 * based on the mask for:
4228 * - client only flags
4229 * - flags used in both directions
4230 * - server only flags
4231 */
4232 both_capabilities = client_capabilities & server_capabilities;
4233 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4234 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4235 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4236
4237 max_xmit = MIN(client_max_xmit, server_max_xmit);
4238
4239 conn->smb1.server.capabilities = server_capabilities;
4240 conn->smb1.capabilities = capabilities;
4241
4242 conn->smb1.server.max_xmit = server_max_xmit;
4243 conn->smb1.max_xmit = max_xmit;
4244
4245 conn->smb1.server.max_mux = server_max_mux;
4246
4247 conn->smb1.server.security_mode = server_security_mode;
4248
4249 conn->smb1.server.readbraw = server_readbraw;
4250 conn->smb1.server.writebraw = server_writebraw;
4251 conn->smb1.server.lockread = server_lockread;
4252 conn->smb1.server.writeunlock = server_writeunlock;
4253
4254 conn->smb1.server.session_key = server_session_key;
4255
4256 talloc_steal(conn, server_gss_blob.data);
4257 conn->smb1.server.gss_blob = server_gss_blob;
4258 conn->smb1.server.guid = server_guid;
4259 memcpy(conn->smb1.server.challenge, server_challenge, 8);
4260 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4261 conn->smb1.server.name = talloc_move(conn, &server_name);
4262
4263 conn->smb1.server.time_zone = server_time_zone;
4264 conn->smb1.server.system_time = server_system_time;
4265
4266 tevent_req_done(req);
4267 }
4268
4269 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4270 {
4271 size_t i;
4272 uint8_t *buf;
4273 uint16_t dialect_count = 0;
4274
4275 buf = state->smb2.dyn;
4276 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4277 if (smb2cli_prots[i].proto < state->min_protocol) {
4278 continue;
4279 }
4280
4281 if (smb2cli_prots[i].proto > state->max_protocol) {
4282 continue;
4283 }
4284
4285 SSVAL(buf, dialect_count*2, smb2cli_prots[i].smb2_dialect);
4286 dialect_count++;
4287 }
4288
4289 buf = state->smb2.fixed;
4290 SSVAL(buf, 0, 36);
4291 SSVAL(buf, 2, dialect_count);
4292 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4293 SSVAL(buf, 6, 0); /* Reserved */
4294 if (state->max_protocol >= PROTOCOL_SMB2_22) {
4295 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4296 } else {
4297 SIVAL(buf, 8, 0); /* Capabilities */
4298 }
4299 if (state->max_protocol >= PROTOCOL_SMB2_10) {
4300 NTSTATUS status;
4301 DATA_BLOB blob;
4302
4303 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4304 state, &blob);
4305 if (!NT_STATUS_IS_OK(status)) {
4306 return NULL;
4307 }
4308 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4309 } else {
4310 memset(buf+12, 0, 16); /* ClientGuid */
4311 }
4312 SBVAL(buf, 28, 0); /* ClientStartTime */
4313
4314 return smb2cli_req_send(state, state->ev,
4315 state->conn, SMB2_OP_NEGPROT,
4316 0, 0, /* flags */
4317 state->timeout_msec,
4318 NULL, NULL, /* tcon, session */
4319 state->smb2.fixed, sizeof(state->smb2.fixed),
4320 state->smb2.dyn, dialect_count*2,
4321 UINT16_MAX); /* max_dyn_len */
4322 }
4323
4324 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4325 {
4326 struct tevent_req *req =
4327 tevent_req_callback_data(subreq,
4328 struct tevent_req);
4329 struct smbXcli_negprot_state *state =
4330 tevent_req_data(req,
4331 struct smbXcli_negprot_state);
4332 struct smbXcli_conn *conn = state->conn;
4333 size_t security_offset, security_length;
4334 DATA_BLOB blob;
4335 NTSTATUS status;
4336 struct iovec *iov;
4337 uint8_t *body;
4338 size_t i;
4339 uint16_t dialect_revision;
4340 static const struct smb2cli_req_expected_response expected[] = {
4341 {
4342 .status = NT_STATUS_OK,
4343 .body_size = 0x41
4344 }
4345 };
4346
4347 status = smb2cli_req_recv(subreq, state, &iov,
4348 expected, ARRAY_SIZE(expected));
4349 TALLOC_FREE(subreq);
4350 if (tevent_req_nterror(req, status)) {
4351 return;
4352 }
4353
4354 body = (uint8_t *)iov[1].iov_base;
4355
4356 dialect_revision = SVAL(body, 4);
4357
4358 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4359 if (smb2cli_prots[i].proto < state->min_protocol) {
4360 continue;
4361 }
4362
4363 if (smb2cli_prots[i].proto > state->max_protocol) {
4364 continue;
4365 }
4366
4367 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4368 continue;
4369 }
4370
4371 conn->protocol = smb2cli_prots[i].proto;
4372 break;
4373 }
4374
4375 if (conn->protocol == PROTOCOL_NONE) {
4376 if (state->min_protocol >= PROTOCOL_SMB2_02) {
4377 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4378 return;
4379 }
4380
4381 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4382 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4383 return;
4384 }
4385
4386 /* make sure we do not loop forever */
4387 state->min_protocol = PROTOCOL_SMB2_02;
4388
4389 /*
4390 * send a SMB2 negprot, in order to negotiate
4391 * the SMB2 dialect.
4392 */
4393 subreq = smbXcli_negprot_smb2_subreq(state);
4394 if (tevent_req_nomem(subreq, req)) {
4395 return;
4396 }
4397 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4398 return;
4399 }
4400
4401 conn->smb2.server.security_mode = SVAL(body, 2);
4402
4403 blob = data_blob_const(body + 8, 16);
4404 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4405 if (tevent_req_nterror(req, status)) {
4406 return;
4407 }
4408
4409 conn->smb2.server.capabilities = IVAL(body, 24);
4410 conn->smb2.server.max_trans_size= IVAL(body, 28);
4411 conn->smb2.server.max_read_size = IVAL(body, 32);
4412 conn->smb2.server.max_write_size= IVAL(body, 36);
4413 conn->smb2.server.system_time = BVAL(body, 40);
4414 conn->smb2.server.start_time = BVAL(body, 48);
4415
4416 security_offset = SVAL(body, 56);
4417 security_length = SVAL(body, 58);
4418
4419 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4420 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4421 return;
4422 }
4423
4424 if (security_length > iov[2].iov_len) {
4425 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4426 return;
4427 }
4428
4429 conn->smb2.server.gss_blob = data_blob_talloc(conn,
4430 iov[2].iov_base,
4431 security_length);
4432 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4433 return;
4434 }
4435
4436 tevent_req_done(req);
4437 }
4438
4439 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4440 TALLOC_CTX *tmp_mem,
4441 uint8_t *inbuf)
4442 {
4443 size_t num_pending = talloc_array_length(conn->pending);
4444 struct tevent_req *subreq;
4445 struct smbXcli_req_state *substate;
4446 struct tevent_req *req;
4447 uint32_t protocol_magic;
4448 size_t inbuf_len = smb_len_nbt(inbuf);
4449
4450 if (num_pending != 1) {
4451 return NT_STATUS_INTERNAL_ERROR;
4452 }
4453
4454 if (inbuf_len < 4) {
4455 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4456 }
4457
4458 subreq = conn->pending[0];
4459 substate = tevent_req_data(subreq, struct smbXcli_req_state);
4460 req = tevent_req_callback_data(subreq, struct tevent_req);
4461
4462 protocol_magic = IVAL(inbuf, 4);
4463
4464 switch (protocol_magic) {
4465 case SMB_MAGIC:
4466 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4467 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4468 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4469
4470 case SMB2_MAGIC:
4471 if (substate->smb2.recv_iov == NULL) {
4472 /*
4473 * For the SMB1 negprot we have move it.
4474 */
4475 substate->smb2.recv_iov = substate->smb1.recv_iov;
4476 substate->smb1.recv_iov = NULL;
4477 }
4478
4479 /*
4480 * we got an SMB2 answer, which consumed sequence number 0
4481 * so we need to use 1 as the next one.
4482 *
4483 * we also need to set the current credits to 0
4484 * as we consumed the initial one. The SMB2 answer
4485 * hopefully grant us a new credit.
4486 */
4487 conn->smb2.mid = 1;
4488 conn->smb2.cur_credits = 0;
4489 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4490 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4491 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4492 }
4493
4494 DEBUG(10, ("Got non-SMB PDU\n"));
4495 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4496 }
4497
4498 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
4499 {
4500 return tevent_req_simple_recv_ntstatus(req);
4501 }
4502
4503 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
4504 uint32_t timeout_msec,
4505 enum protocol_types min_protocol,
4506 enum protocol_types max_protocol)
4507 {
4508 TALLOC_CTX *frame = talloc_stackframe();
4509 struct tevent_context *ev;
4510 struct tevent_req *req;
4511 NTSTATUS status = NT_STATUS_NO_MEMORY;
4512 bool ok;
4513
4514 if (smbXcli_conn_has_async_calls(conn)) {
4515 /*
4516 * Can't use sync call while an async call is in flight
4517 */
4518 status = NT_STATUS_INVALID_PARAMETER_MIX;
4519 goto fail;
4520 }
4521 ev = samba_tevent_context_init(frame);
4522 if (ev == NULL) {
4523 goto fail;
4524 }
4525 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
4526 min_protocol, max_protocol);
4527 if (req == NULL) {
4528 goto fail;
4529 }
4530 ok = tevent_req_poll(req, ev);
4531 if (!ok) {
4532 status = map_nt_error_from_unix_common(errno);
4533 goto fail;
4534 }
4535 status = smbXcli_negprot_recv(req);
4536 fail:
4537 TALLOC_FREE(frame);
4538 return status;
4539 }
4540
4541 static int smbXcli_session_destructor(struct smbXcli_session *session)
4542 {
4543 if (session->conn == NULL) {
4544 return 0;
4545 }
4546
4547 DLIST_REMOVE(session->conn->sessions, session);
4548 return 0;
4549 }
4550
4551 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
4552 struct smbXcli_conn *conn)
4553 {
4554 struct smbXcli_session *session;
4555
4556 session = talloc_zero(mem_ctx, struct smbXcli_session);
4557 if (session == NULL) {
4558 return NULL;
4559 }
4560 session->smb2 = talloc_zero(session, struct smb2cli_session);
4561 if (session->smb2 == NULL) {
4562 talloc_free(session);
4563 return NULL;
4564 }
4565 talloc_set_destructor(session, smbXcli_session_destructor);
4566
4567 DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
4568 session->conn = conn;
4569
4570 return session;
4571 }
4572
4573 struct smbXcli_session *smbXcli_session_copy(TALLOC_CTX *mem_ctx,
4574 struct smbXcli_session *src)
4575 {
4576 struct smbXcli_session *session;
4577
4578 session = talloc_zero(mem_ctx, struct smbXcli_session);
4579 if (session == NULL) {
4580 return NULL;
4581 }
4582 session->smb2 = talloc_zero(session, struct smb2cli_session);
4583 if (session->smb2 == NULL) {
4584 talloc_free(session);
4585 return NULL;
4586 }
4587
4588 session->conn = src->conn;
4589 *session->smb2 = *src->smb2;
4590 session->smb2_channel = src->smb2_channel;
4591 session->disconnect_expired = src->disconnect_expired;
4592
4593 DLIST_ADD_END(src->conn->sessions, session, struct smbXcli_session *);
4594 talloc_set_destructor(session, smbXcli_session_destructor);
4595
4596 return session;
4597 }
4598
4599
4600 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
4601 TALLOC_CTX *mem_ctx,
4602 DATA_BLOB *key)
4603 {
4604 const DATA_BLOB *application_key;
4605
4606 *key = data_blob_null;
4607
4608 if (session->conn == NULL) {
4609 return NT_STATUS_NO_USER_SESSION_KEY;
4610 }
4611
4612 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
4613 application_key = &session->smb2->application_key;
4614 } else {
4615 application_key = &session->smb1.application_key;
4616 }
4617
4618 if (application_key->length == 0) {
4619 return NT_STATUS_NO_USER_SESSION_KEY;
4620 }
4621
4622 *key = data_blob_dup_talloc(mem_ctx, *application_key);
4623 if (key->data == NULL) {
4624 return NT_STATUS_NO_MEMORY;
4625 }
4626
4627 return NT_STATUS_OK;
4628 }
4629
4630 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
4631 {
4632 session->disconnect_expired = true;
4633 }
4634
4635 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
4636 {
4637 return session->smb1.session_id;
4638 }
4639
4640 void smb1cli_session_set_id(struct smbXcli_session *session,
4641 uint16_t session_id)
4642 {
4643 session->smb1.session_id = session_id;
4644 }
4645
4646 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
4647 const DATA_BLOB _session_key)
4648 {
4649 struct smbXcli_conn *conn = session->conn;
4650 uint8_t session_key[16];
4651
4652 if (conn == NULL) {
4653 return NT_STATUS_INVALID_PARAMETER_MIX;
4654 }
4655
4656 if (session->smb1.application_key.length != 0) {
4657 /*
4658 * TODO: do not allow this...
4659 *
4660 * return NT_STATUS_INVALID_PARAMETER_MIX;
4661 */
4662 data_blob_clear_free(&session->smb1.application_key);
4663 session->smb1.protected_key = false;
4664 }
4665
4666 if (_session_key.length == 0) {
4667 return NT_STATUS_OK;
4668 }
4669
4670 ZERO_STRUCT(session_key);
4671 memcpy(session_key, _session_key.data,
4672 MIN(_session_key.length, sizeof(session_key)));
4673
4674 session->smb1.application_key = data_blob_talloc(session,
4675 session_key,
4676 sizeof(session_key));
4677 ZERO_STRUCT(session_key);
4678 if (session->smb1.application_key.data == NULL) {
4679 return NT_STATUS_NO_MEMORY;
4680 }
4681
4682 session->smb1.protected_key = false;
4683
4684 return NT_STATUS_OK;
4685 }
4686
4687 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
4688 {
4689 if (session->smb1.protected_key) {
4690 /* already protected */
4691 return NT_STATUS_OK;
4692 }
4693
4694 if (session->smb1.application_key.length != 16) {
4695 return NT_STATUS_INVALID_PARAMETER_MIX;
4696 }
4697
4698 smb_key_derivation(session->smb1.application_key.data,
4699 session->smb1.application_key.length,
4700 session->smb1.application_key.data);
4701
4702 session->smb1.protected_key = true;
4703
4704 return NT_STATUS_OK;
4705 }
4706
4707 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
4708 {
4709 struct smbXcli_conn *conn = session->conn;
4710 uint8_t security_mode = 0;
4711
4712 if (conn == NULL) {
4713 return security_mode;
4714 }
4715
4716 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
4717 if (conn->mandatory_signing) {
4718 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
4719 }
4720
4721 return security_mode;
4722 }
4723
4724 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
4725 {
4726 return session->smb2->session_id;
4727 }
4728
4729 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
4730 {
4731 return session->smb2->session_flags;
4732 }
4733
4734 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
4735 uint64_t session_id,
4736 uint16_t session_flags)
4737 {
4738 session->smb2->session_id = session_id;
4739 session->smb2->session_flags = session_flags;
4740 }
4741
4742 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
4743 {
4744 session->smb2->channel_sequence += 1;
4745 }
4746
4747 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
4748 const DATA_BLOB _session_key,
4749 const struct iovec *recv_iov)
4750 {
4751 struct smbXcli_conn *conn = session->conn;
4752 uint16_t no_sign_flags;
4753 uint8_t session_key[16];
4754 bool check_signature = true;
4755 uint32_t hdr_flags;
4756 NTSTATUS status;
4757
4758 if (conn == NULL) {
4759 return NT_STATUS_INVALID_PARAMETER_MIX;
4760 }
4761
4762 if (recv_iov[0].iov_len != SMB2_HDR_BODY) {
4763 return NT_STATUS_INVALID_PARAMETER_MIX;
4764 }
4765
4766 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
4767
4768 if (session->smb2->session_flags & no_sign_flags) {
4769 session->smb2->should_sign = false;
4770 return NT_STATUS_OK;
4771 }
4772
4773 if (session->smb2->signing_key.length != 0) {
4774 return NT_STATUS_INVALID_PARAMETER_MIX;
4775 }
4776
4777 ZERO_STRUCT(session_key);
4778 memcpy(session_key, _session_key.data,
4779 MIN(_session_key.length, sizeof(session_key)));
4780
4781 session->smb2->signing_key = data_blob_talloc(session,
4782 session_key,
4783 sizeof(session_key));
4784 if (session->smb2->signing_key.data == NULL) {
4785 ZERO_STRUCT(session_key);
4786 return NT_STATUS_NO_MEMORY;
4787 }
4788
4789 if (conn->protocol >= PROTOCOL_SMB2_24) {
4790 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4791 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4792
4793 smb2_key_derivation(session_key, sizeof(session_key),
4794 label.data, label.length,
4795 context.data, context.length,
4796 session->smb2->signing_key.data);
4797 }
4798
4799 session->smb2->encryption_key = data_blob_dup_talloc(session,
4800 session->smb2->signing_key);
4801 if (session->smb2->encryption_key.data == NULL) {
4802 ZERO_STRUCT(session_key);
4803 return NT_STATUS_NO_MEMORY;
4804 }
4805
4806 if (conn->protocol >= PROTOCOL_SMB2_24) {
4807 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4808 const DATA_BLOB context = data_blob_string_const_null("ServerIn ");
4809
4810 smb2_key_derivation(session_key, sizeof(session_key),
4811 label.data, label.length,
4812 context.data, context.length,
4813 session->smb2->encryption_key.data);
4814 }
4815
4816 session->smb2->decryption_key = data_blob_dup_talloc(session,
4817 session->smb2->signing_key);
4818 if (session->smb2->decryption_key.data == NULL) {
4819 ZERO_STRUCT(session_key);
4820 return NT_STATUS_NO_MEMORY;
4821 }
4822
4823 if (conn->protocol >= PROTOCOL_SMB2_24) {
4824 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4825 const DATA_BLOB context = data_blob_string_const_null("ServerOut");
4826
4827 smb2_key_derivation(session_key, sizeof(session_key),
4828 label.data, label.length,
4829 context.data, context.length,
4830 session->smb2->decryption_key.data);
4831 }
4832
4833 session->smb2->application_key = data_blob_dup_talloc(session,
4834 session->smb2->signing_key);
4835 if (session->smb2->application_key.data == NULL) {
4836 ZERO_STRUCT(session_key);
4837 return NT_STATUS_NO_MEMORY;
4838 }
4839
4840 if (conn->protocol >= PROTOCOL_SMB2_24) {
4841 const DATA_BLOB label = data_blob_string_const_null("SMB2APP");
4842 const DATA_BLOB context = data_blob_string_const_null("SmbRpc");
4843
4844 smb2_key_derivation(session_key, sizeof(session_key),
4845 label.data, label.length,
4846 context.data, context.length,
4847 session->smb2->application_key.data);
4848 }
4849 ZERO_STRUCT(session_key);
4850
4851 session->smb2_channel.signing_key = data_blob_dup_talloc(session,
4852 session->smb2->signing_key);
4853 if (session->smb2_channel.signing_key.data == NULL) {
4854 return NT_STATUS_NO_MEMORY;
4855 }
4856
4857 check_signature = conn->mandatory_signing;
4858
4859 hdr_flags = IVAL(recv_iov[0].iov_base, SMB2_HDR_FLAGS);
4860 if (hdr_flags & SMB2_HDR_FLAG_SIGNED) {
4861 /*
4862 * Sadly some vendors don't sign the
4863 * final SMB2 session setup response
4864 *
4865 * At least Windows and Samba are always doing this
4866 * if there's a session key available.
4867 *
4868 * We only check the signature if it's mandatory
4869 * or SMB2_HDR_FLAG_SIGNED is provided.
4870 */
4871 check_signature = true;
4872 }
4873
4874 if (check_signature) {
4875 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4876 session->conn->protocol,
4877 recv_iov, 3);
4878 if (!NT_STATUS_IS_OK(status)) {
4879 return status;
4880 }
4881 }
4882
4883 session->smb2->should_sign = false;
4884 session->smb2->should_encrypt = false;
4885
4886 if (conn->desire_signing) {
4887 session->smb2->should_sign = true;
4888 }
4889
4890 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
4891 session->smb2->should_sign = true;
4892 }
4893
4894 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
4895 session->smb2->should_encrypt = true;
4896 }
4897
4898 if (conn->protocol < PROTOCOL_SMB2_24) {
4899 session->smb2->should_encrypt = false;
4900 }
4901
4902 if (!(conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
4903 session->smb2->should_encrypt = false;
4904 }
4905
4906 generate_random_buffer((uint8_t *)&session->smb2->nonce_high,
4907 sizeof(session->smb2->nonce_high));
4908 session->smb2->nonce_low = 1;
4909
4910 return NT_STATUS_OK;
4911 }
4912
4913 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
4914 struct smbXcli_session *session1,
4915 struct smbXcli_conn *conn,
4916 struct smbXcli_session **_session2)
4917 {
4918 struct smbXcli_session *session2;
4919
4920 if (session1->smb2->signing_key.length == 0) {
4921 return NT_STATUS_INVALID_PARAMETER_MIX;
4922 }
4923
4924 if (conn == NULL) {
4925 return NT_STATUS_INVALID_PARAMETER_MIX;
4926 }
4927
4928 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
4929 if (session2 == NULL) {
4930 return NT_STATUS_NO_MEMORY;
4931 }
4932 session2->smb2 = talloc_reference(session2, session1->smb2);
4933 if (session2->smb2 == NULL) {
4934 talloc_free(session2);
4935 return NT_STATUS_NO_MEMORY;
4936 }
4937
4938 talloc_set_destructor(session2, smbXcli_session_destructor);
4939 DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
4940 session2->conn = conn;
4941
4942 *_session2 = session2;
4943 return NT_STATUS_OK;
4944 }
4945
4946 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
4947 const DATA_BLOB _channel_key,
4948 const struct iovec *recv_iov)
4949 {
4950 struct smbXcli_conn *conn = session->conn;
4951 uint8_t channel_key[16];
4952 NTSTATUS status;
4953
4954 if (conn == NULL) {
4955 return NT_STATUS_INVALID_PARAMETER_MIX;
4956 }
4957
4958 if (session->smb2_channel.signing_key.length != 0) {
4959 return NT_STATUS_INVALID_PARAMETER_MIX;
4960 }
4961
4962 ZERO_STRUCT(channel_key);
4963 memcpy(channel_key, _channel_key.data,
4964 MIN(_channel_key.length, sizeof(channel_key)));
4965
4966 session->smb2_channel.signing_key = data_blob_talloc(session,
4967 channel_key,
4968 sizeof(channel_key));
4969 if (session->smb2_channel.signing_key.data == NULL) {
4970 ZERO_STRUCT(channel_key);
4971 return NT_STATUS_NO_MEMORY;
4972 }
4973
4974 if (conn->protocol >= PROTOCOL_SMB2_24) {
4975 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4976 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4977
4978 smb2_key_derivation(channel_key, sizeof(channel_key),
4979 label.data, label.length,
4980 context.data, context.length,
4981 session->smb2_channel.signing_key.data);
4982 }
4983 ZERO_STRUCT(channel_key);
4984
4985 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4986 session->conn->protocol,
4987 recv_iov, 3);
4988 if (!NT_STATUS_IS_OK(status)) {
4989 return status;
4990 }
4991
4992 return NT_STATUS_OK;
4993 }
4994
4995 NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
4996 {
4997 if (session->smb2->should_encrypt) {
4998 return NT_STATUS_OK;
4999 }
5000
5001 if (session->conn->protocol < PROTOCOL_SMB2_24) {
5002 return NT_STATUS_NOT_SUPPORTED;
5003 }
5004
5005 if (!(session->conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
5006 return NT_STATUS_NOT_SUPPORTED;
5007 }
5008
5009 if (session->smb2->signing_key.data == NULL) {
5010 return NT_STATUS_NOT_SUPPORTED;
5011 }
5012 session->smb2->should_encrypt = true;
5013 return NT_STATUS_OK;
5014 }
5015
5016 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
5017 {
5018 struct smbXcli_tcon *tcon;
5019
5020 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
5021 if (tcon == NULL) {
5022 return NULL;
5023 }
5024
5025 return tcon;
5026 }
5027
5028 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
5029 {
5030 return tcon->smb1.tcon_id;
5031 }
5032
5033 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
5034 {
5035 tcon->smb1.tcon_id = tcon_id;
5036 }
5037
5038 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
5039 uint16_t tcon_id,
5040 uint16_t optional_support,
5041 uint32_t maximal_access,
5042 uint32_t guest_maximal_access,
5043 const char *service,
5044 const char *fs_type)
5045 {
5046 tcon->smb1.tcon_id = tcon_id;
5047 tcon->smb1.optional_support = optional_support;
5048 tcon->smb1.maximal_access = maximal_access;
5049 tcon->smb1.guest_maximal_access = guest_maximal_access;
5050
5051 TALLOC_FREE(tcon->smb1.service);
5052 tcon->smb1.service = talloc_strdup(tcon, service);
5053 if (service != NULL && tcon->smb1.service == NULL) {
5054 return false;
5055 }
5056
5057 TALLOC_FREE(tcon->smb1.fs_type);
5058 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
5059 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
5060 return false;
5061 }
5062
5063 return true;
5064 }
5065
5066 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
5067 {
5068 return tcon->smb2.tcon_id;
5069 }
5070
5071 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
5072 {
5073 return tcon->smb2.capabilities;
5074 }
5075
5076 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
5077 struct smbXcli_session *session,
5078 uint32_t tcon_id,
5079 uint8_t type,
5080 uint32_t flags,
5081 uint32_t capabilities,
5082 uint32_t maximal_access)
5083 {
5084 tcon->smb2.tcon_id = tcon_id;
5085 tcon->smb2.type = type;
5086 tcon->smb2.flags = flags;
5087 tcon->smb2.capabilities = capabilities;
5088 tcon->smb2.maximal_access = maximal_access;
5089
5090 tcon->smb2.should_encrypt = false;
5091
5092 if (session == NULL) {
5093 return;
5094 }
5095
5096 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
5097
5098 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
5099 tcon->smb2.should_encrypt = true;
5100 }
5101 }
5102
5103 bool smb2cli_tcon_is_encryption_on(struct smbXcli_tcon *tcon)
5104 {
5105 return tcon->smb2.should_encrypt;
5106 }
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