?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
s3:rpc_client: add cli_rpc_pipe_open_schannel_with_creds() helper function
[Samba.git] / libcli / smb / smbXcli_base.c
blob8aa60201901d2446091ce6212fd3c289a1a11660
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 #include "libcli/smb/smb2_negotiate_context.h"
35 #include "lib/crypto/sha512.h"
36
37 struct smbXcli_conn;
38 struct smbXcli_req;
39 struct smbXcli_session;
40 struct smbXcli_tcon;
41
42 struct smbXcli_conn {
43 int read_fd;
44 int write_fd;
45 struct sockaddr_storage local_ss;
46 struct sockaddr_storage remote_ss;
47 const char *remote_name;
48
49 struct tevent_queue *outgoing;
50 struct tevent_req **pending;
51 struct tevent_req *read_smb_req;
52
53 enum protocol_types min_protocol;
54 enum protocol_types max_protocol;
55 enum protocol_types protocol;
56 bool allow_signing;
57 bool desire_signing;
58 bool mandatory_signing;
59
60 /*
61 * The incoming dispatch function should return:
62 * - NT_STATUS_RETRY, if more incoming PDUs are expected.
63 * - NT_STATUS_OK, if no more processing is desired, e.g.
64 * the dispatch function called
65 * tevent_req_done().
66 * - All other return values disconnect the connection.
67 */
68 NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
69 TALLOC_CTX *tmp_mem,
70 uint8_t *inbuf);
71
72 struct {
73 struct {
74 uint32_t capabilities;
75 uint32_t max_xmit;
76 } client;
77
78 struct {
79 uint32_t capabilities;
80 uint32_t max_xmit;
81 uint16_t max_mux;
82 uint16_t security_mode;
83 bool readbraw;
84 bool writebraw;
85 bool lockread;
86 bool writeunlock;
87 uint32_t session_key;
88 struct GUID guid;
89 DATA_BLOB gss_blob;
90 uint8_t challenge[8];
91 const char *workgroup;
92 const char *name;
93 int time_zone;
94 NTTIME system_time;
95 } server;
96
97 uint32_t capabilities;
98 uint32_t max_xmit;
99
100 uint16_t mid;
101
102 struct smb_signing_state *signing;
103 struct smb_trans_enc_state *trans_enc;
104
105 struct tevent_req *read_braw_req;
106 } smb1;
107
108 struct {
109 struct {
110 uint32_t capabilities;
111 uint16_t security_mode;
112 struct GUID guid;
113 } client;
114
115 struct {
116 uint32_t capabilities;
117 uint16_t security_mode;
118 struct GUID guid;
119 uint32_t max_trans_size;
120 uint32_t max_read_size;
121 uint32_t max_write_size;
122 NTTIME system_time;
123 NTTIME start_time;
124 DATA_BLOB gss_blob;
125 uint16_t cipher;
126 } server;
127
128 uint64_t mid;
129 uint16_t cur_credits;
130 uint16_t max_credits;
131
132 uint8_t preauth_sha512[64];
133 } smb2;
134
135 struct smbXcli_session *sessions;
136 };
137
138 struct smb2cli_session {
139 uint64_t session_id;
140 uint16_t session_flags;
141 DATA_BLOB application_key;
142 DATA_BLOB signing_key;
143 bool should_sign;
144 bool should_encrypt;
145 DATA_BLOB encryption_key;
146 DATA_BLOB decryption_key;
147 uint64_t nonce_high;
148 uint64_t nonce_low;
149 uint16_t channel_sequence;
150 bool replay_active;
151 };
152
153 struct smbXcli_session {
154 struct smbXcli_session *prev, *next;
155 struct smbXcli_conn *conn;
156
157 struct {
158 uint16_t session_id;
159 DATA_BLOB application_key;
160 bool protected_key;
161 } smb1;
162
163 struct smb2cli_session *smb2;
164
165 struct {
166 DATA_BLOB signing_key;
167 uint8_t preauth_sha512[64];
168 } smb2_channel;
169
170 /*
171 * this should be a short term hack
172 * until the upper layers have implemented
173 * re-authentication.
174 */
175 bool disconnect_expired;
176 };
177
178 struct smbXcli_tcon {
179 bool is_smb1;
180 uint32_t fs_attributes;
181
182 struct {
183 uint16_t tcon_id;
184 uint16_t optional_support;
185 uint32_t maximal_access;
186 uint32_t guest_maximal_access;
187 char *service;
188 char *fs_type;
189 } smb1;
190
191 struct {
192 uint32_t tcon_id;
193 uint8_t type;
194 uint32_t flags;
195 uint32_t capabilities;
196 uint32_t maximal_access;
197 bool should_sign;
198 bool should_encrypt;
199 } smb2;
200 };
201
202 struct smbXcli_req_state {
203 struct tevent_context *ev;
204 struct smbXcli_conn *conn;
205 struct smbXcli_session *session; /* maybe NULL */
206 struct smbXcli_tcon *tcon; /* maybe NULL */
207
208 uint8_t length_hdr[4];
209
210 bool one_way;
211
212 uint8_t *inbuf;
213
214 struct {
215 /* Space for the header including the wct */
216 uint8_t hdr[HDR_VWV];
217
218 /*
219 * For normal requests, smb1cli_req_send chooses a mid.
220 * SecondaryV trans requests need to use the mid of the primary
221 * request, so we need a place to store it.
222 * Assume it is set if != 0.
223 */
224 uint16_t mid;
225
226 uint16_t *vwv;
227 uint8_t bytecount_buf[2];
228
229 #define MAX_SMB_IOV 10
230 /* length_hdr, hdr, words, byte_count, buffers */
231 struct iovec iov[1 + 3 + MAX_SMB_IOV];
232 int iov_count;
233
234 bool one_way_seqnum;
235 uint32_t seqnum;
236 struct tevent_req **chained_requests;
237
238 uint8_t recv_cmd;
239 NTSTATUS recv_status;
240 /* always an array of 3 talloc elements */
241 struct iovec *recv_iov;
242 } smb1;
243
244 struct {
245 const uint8_t *fixed;
246 uint16_t fixed_len;
247 const uint8_t *dyn;
248 uint32_t dyn_len;
249
250 uint8_t transform[SMB2_TF_HDR_SIZE];
251 uint8_t hdr[SMB2_HDR_BODY];
252 uint8_t pad[7]; /* padding space for compounding */
253
254 /*
255 * always an array of 3 talloc elements
256 * (without a SMB2_TRANSFORM header!)
257 *
258 * HDR, BODY, DYN
259 */
260 struct iovec *recv_iov;
261
262 /*
263 * the expected max for the response dyn_len
264 */
265 uint32_t max_dyn_len;
266
267 uint16_t credit_charge;
268
269 bool should_sign;
270 bool should_encrypt;
271 uint64_t encryption_session_id;
272
273 bool signing_skipped;
274 bool notify_async;
275 bool got_async;
276 } smb2;
277 };
278
279 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
280 {
281 /*
282 * NT_STATUS_OK, means we do not notify the callers
283 */
284 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
285
286 while (conn->sessions) {
287 conn->sessions->conn = NULL;
288 DLIST_REMOVE(conn->sessions, conn->sessions);
289 }
290
291 if (conn->smb1.trans_enc) {
292 TALLOC_FREE(conn->smb1.trans_enc);
293 }
294
295 return 0;
296 }
297
298 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
299 int fd,
300 const char *remote_name,
301 enum smb_signing_setting signing_state,
302 uint32_t smb1_capabilities,
303 struct GUID *client_guid,
304 uint32_t smb2_capabilities)
305 {
306 struct smbXcli_conn *conn = NULL;
307 void *ss = NULL;
308 struct sockaddr *sa = NULL;
309 socklen_t sa_length;
310 int ret;
311
312 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
313 if (!conn) {
314 return NULL;
315 }
316
317 conn->read_fd = fd;
318 conn->write_fd = dup(fd);
319 if (conn->write_fd == -1) {
320 goto error;
321 }
322
323 conn->remote_name = talloc_strdup(conn, remote_name);
324 if (conn->remote_name == NULL) {
325 goto error;
326 }
327
328
329 ss = (void *)&conn->local_ss;
330 sa = (struct sockaddr *)ss;
331 sa_length = sizeof(conn->local_ss);
332 ret = getsockname(fd, sa, &sa_length);
333 if (ret == -1) {
334 goto error;
335 }
336 ss = (void *)&conn->remote_ss;
337 sa = (struct sockaddr *)ss;
338 sa_length = sizeof(conn->remote_ss);
339 ret = getpeername(fd, sa, &sa_length);
340 if (ret == -1) {
341 goto error;
342 }
343
344 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
345 if (conn->outgoing == NULL) {
346 goto error;
347 }
348 conn->pending = NULL;
349
350 conn->min_protocol = PROTOCOL_NONE;
351 conn->max_protocol = PROTOCOL_NONE;
352 conn->protocol = PROTOCOL_NONE;
353
354 switch (signing_state) {
355 case SMB_SIGNING_OFF:
356 /* never */
357 conn->allow_signing = false;
358 conn->desire_signing = false;
359 conn->mandatory_signing = false;
360 break;
361 case SMB_SIGNING_DEFAULT:
362 case SMB_SIGNING_IF_REQUIRED:
363 /* if the server requires it */
364 conn->allow_signing = true;
365 conn->desire_signing = false;
366 conn->mandatory_signing = false;
367 break;
368 case SMB_SIGNING_REQUIRED:
369 /* always */
370 conn->allow_signing = true;
371 conn->desire_signing = true;
372 conn->mandatory_signing = true;
373 break;
374 }
375
376 conn->smb1.client.capabilities = smb1_capabilities;
377 conn->smb1.client.max_xmit = UINT16_MAX;
378
379 conn->smb1.capabilities = conn->smb1.client.capabilities;
380 conn->smb1.max_xmit = 1024;
381
382 conn->smb1.mid = 1;
383
384 /* initialise signing */
385 conn->smb1.signing = smb_signing_init(conn,
386 conn->allow_signing,
387 conn->desire_signing,
388 conn->mandatory_signing);
389 if (!conn->smb1.signing) {
390 goto error;
391 }
392
393 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
394 if (conn->mandatory_signing) {
395 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
396 }
397 if (client_guid) {
398 conn->smb2.client.guid = *client_guid;
399 }
400 conn->smb2.client.capabilities = smb2_capabilities;
401
402 conn->smb2.cur_credits = 1;
403 conn->smb2.max_credits = 0;
404
405 talloc_set_destructor(conn, smbXcli_conn_destructor);
406 return conn;
407
408 error:
409 if (conn->write_fd != -1) {
410 close(conn->write_fd);
411 }
412 TALLOC_FREE(conn);
413 return NULL;
414 }
415
416 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
417 {
418 if (conn == NULL) {
419 return false;
420 }
421
422 if (conn->read_fd == -1) {
423 return false;
424 }
425
426 return true;
427 }
428
429 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
430 {
431 return conn->protocol;
432 }
433
434 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
435 {
436 if (conn->protocol >= PROTOCOL_SMB2_02) {
437 return true;
438 }
439
440 if (conn->smb1.capabilities & CAP_UNICODE) {
441 return true;
442 }
443
444 return false;
445 }
446
447 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
448 {
449 set_socket_options(conn->read_fd, options);
450 }
451
452 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
453 {
454 return &conn->local_ss;
455 }
456
457 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
458 {
459 return &conn->remote_ss;
460 }
461
462 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
463 {
464 return conn->remote_name;
465 }
466
467 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
468 {
469 if (conn->protocol >= PROTOCOL_SMB2_02) {
470 /*
471 * TODO...
472 */
473 return 1;
474 }
475
476 return conn->smb1.server.max_mux;
477 }
478
479 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
480 {
481 if (conn->protocol >= PROTOCOL_SMB2_02) {
482 return conn->smb2.server.system_time;
483 }
484
485 return conn->smb1.server.system_time;
486 }
487
488 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
489 {
490 if (conn->protocol >= PROTOCOL_SMB2_02) {
491 return &conn->smb2.server.gss_blob;
492 }
493
494 return &conn->smb1.server.gss_blob;
495 }
496
497 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
498 {
499 if (conn->protocol >= PROTOCOL_SMB2_02) {
500 return &conn->smb2.server.guid;
501 }
502
503 return &conn->smb1.server.guid;
504 }
505
506 struct smbXcli_conn_samba_suicide_state {
507 struct smbXcli_conn *conn;
508 struct iovec iov;
509 uint8_t buf[9];
510 };
511
512 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
513
514 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
515 struct tevent_context *ev,
516 struct smbXcli_conn *conn,
517 uint8_t exitcode)
518 {
519 struct tevent_req *req, *subreq;
520 struct smbXcli_conn_samba_suicide_state *state;
521
522 req = tevent_req_create(mem_ctx, &state,
523 struct smbXcli_conn_samba_suicide_state);
524 if (req == NULL) {
525 return NULL;
526 }
527 state->conn = conn;
528 SIVAL(state->buf, 4, 0x74697865);
529 SCVAL(state->buf, 8, exitcode);
530 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
531
532 state->iov.iov_base = state->buf;
533 state->iov.iov_len = sizeof(state->buf);
534
535 subreq = writev_send(state, ev, conn->outgoing, conn->write_fd,
536 false, &state->iov, 1);
537 if (tevent_req_nomem(subreq, req)) {
538 return tevent_req_post(req, ev);
539 }
540 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
541 return req;
542 }
543
544 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
545 {
546 struct tevent_req *req = tevent_req_callback_data(
547 subreq, struct tevent_req);
548 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
549 req, struct smbXcli_conn_samba_suicide_state);
550 ssize_t nwritten;
551 int err;
552
553 nwritten = writev_recv(subreq, &err);
554 TALLOC_FREE(subreq);
555 if (nwritten == -1) {
556 NTSTATUS status = map_nt_error_from_unix_common(err);
557 smbXcli_conn_disconnect(state->conn, status);
558 return;
559 }
560 tevent_req_done(req);
561 }
562
563 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
564 {
565 return tevent_req_simple_recv_ntstatus(req);
566 }
567
568 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
569 uint8_t exitcode)
570 {
571 TALLOC_CTX *frame = talloc_stackframe();
572 struct tevent_context *ev;
573 struct tevent_req *req;
574 NTSTATUS status = NT_STATUS_NO_MEMORY;
575 bool ok;
576
577 if (smbXcli_conn_has_async_calls(conn)) {
578 /*
579 * Can't use sync call while an async call is in flight
580 */
581 status = NT_STATUS_INVALID_PARAMETER_MIX;
582 goto fail;
583 }
584 ev = samba_tevent_context_init(frame);
585 if (ev == NULL) {
586 goto fail;
587 }
588 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
589 if (req == NULL) {
590 goto fail;
591 }
592 ok = tevent_req_poll(req, ev);
593 if (!ok) {
594 status = map_nt_error_from_unix_common(errno);
595 goto fail;
596 }
597 status = smbXcli_conn_samba_suicide_recv(req);
598 fail:
599 TALLOC_FREE(frame);
600 return status;
601 }
602
603 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
604 {
605 return conn->smb1.capabilities;
606 }
607
608 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
609 {
610 return conn->smb1.max_xmit;
611 }
612
613 bool smb1cli_conn_req_possible(struct smbXcli_conn *conn)
614 {
615 size_t pending;
616 uint16_t possible = conn->smb1.server.max_mux;
617
618 pending = tevent_queue_length(conn->outgoing);
619 if (pending >= possible) {
620 return false;
621 }
622 pending += talloc_array_length(conn->pending);
623 if (pending >= possible) {
624 return false;
625 }
626
627 return true;
628 }
629
630 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
631 {
632 return conn->smb1.server.session_key;
633 }
634
635 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
636 {
637 return conn->smb1.server.challenge;
638 }
639
640 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
641 {
642 return conn->smb1.server.security_mode;
643 }
644
645 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
646 {
647 return conn->smb1.server.readbraw;
648 }
649
650 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
651 {
652 return conn->smb1.server.writebraw;
653 }
654
655 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
656 {
657 return conn->smb1.server.lockread;
658 }
659
660 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
661 {
662 return conn->smb1.server.writeunlock;
663 }
664
665 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
666 {
667 return conn->smb1.server.time_zone;
668 }
669
670 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
671 const DATA_BLOB user_session_key,
672 const DATA_BLOB response)
673 {
674 return smb_signing_activate(conn->smb1.signing,
675 user_session_key,
676 response);
677 }
678
679 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
680 const uint8_t *buf, uint32_t seqnum)
681 {
682 const uint8_t *hdr = buf + NBT_HDR_SIZE;
683 size_t len = smb_len_nbt(buf);
684
685 return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
686 }
687
688 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
689 {
690 return smb_signing_is_active(conn->smb1.signing);
691 }
692
693 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
694 struct smb_trans_enc_state *es)
695 {
696 /* Replace the old state, if any. */
697 if (conn->smb1.trans_enc) {
698 TALLOC_FREE(conn->smb1.trans_enc);
699 }
700 conn->smb1.trans_enc = es;
701 }
702
703 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
704 {
705 return common_encryption_on(conn->smb1.trans_enc);
706 }
707
708
709 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
710 {
711 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
712 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
713
714 if (NT_STATUS_IS_OK(status)) {
715 return NT_STATUS_OK;
716 }
717
718 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
719 return status;
720 }
721
722 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
723 }
724
725 /**
726 * Is the SMB command able to hold an AND_X successor
727 * @param[in] cmd The SMB command in question
728 * @retval Can we add a chained request after "cmd"?
729 */
730 bool smb1cli_is_andx_req(uint8_t cmd)
731 {
732 switch (cmd) {
733 case SMBtconX:
734 case SMBlockingX:
735 case SMBopenX:
736 case SMBreadX:
737 case SMBwriteX:
738 case SMBsesssetupX:
739 case SMBulogoffX:
740 case SMBntcreateX:
741 return true;
742 break;
743 default:
744 break;
745 }
746
747 return false;
748 }
749
750 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
751 {
752 size_t num_pending = talloc_array_length(conn->pending);
753 uint16_t result;
754
755 if (conn->protocol == PROTOCOL_NONE) {
756 /*
757 * This is what windows sends on the SMB1 Negprot request
758 * and some vendors reuse the SMB1 MID as SMB2 sequence number.
759 */
760 return 0;
761 }
762
763 while (true) {
764 size_t i;
765
766 result = conn->smb1.mid++;
767 if ((result == 0) || (result == 0xffff)) {
768 continue;
769 }
770
771 for (i=0; i<num_pending; i++) {
772 if (result == smb1cli_req_mid(conn->pending[i])) {
773 break;
774 }
775 }
776
777 if (i == num_pending) {
778 return result;
779 }
780 }
781 }
782
783 void smbXcli_req_unset_pending(struct tevent_req *req)
784 {
785 struct smbXcli_req_state *state =
786 tevent_req_data(req,
787 struct smbXcli_req_state);
788 struct smbXcli_conn *conn = state->conn;
789 size_t num_pending = talloc_array_length(conn->pending);
790 size_t i;
791
792 if (state->smb1.mid != 0) {
793 /*
794 * This is a [nt]trans[2] request which waits
795 * for more than one reply.
796 */
797 return;
798 }
799
800 tevent_req_set_cleanup_fn(req, NULL);
801
802 if (num_pending == 1) {
803 /*
804 * The pending read_smb tevent_req is a child of
805 * conn->pending. So if nothing is pending anymore, we need to
806 * delete the socket read fde.
807 */
808 TALLOC_FREE(conn->pending);
809 conn->read_smb_req = NULL;
810 return;
811 }
812
813 for (i=0; i<num_pending; i++) {
814 if (req == conn->pending[i]) {
815 break;
816 }
817 }
818 if (i == num_pending) {
819 /*
820 * Something's seriously broken. Just returning here is the
821 * right thing nevertheless, the point of this routine is to
822 * remove ourselves from conn->pending.
823 */
824 return;
825 }
826
827 /*
828 * Remove ourselves from the conn->pending array
829 */
830 for (; i < (num_pending - 1); i++) {
831 conn->pending[i] = conn->pending[i+1];
832 }
833
834 /*
835 * No NULL check here, we're shrinking by sizeof(void *), and
836 * talloc_realloc just adjusts the size for this.
837 */
838 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
839 num_pending - 1);
840 return;
841 }
842
843 static void smbXcli_req_cleanup(struct tevent_req *req,
844 enum tevent_req_state req_state)
845 {
846 struct smbXcli_req_state *state =
847 tevent_req_data(req,
848 struct smbXcli_req_state);
849
850 switch (req_state) {
851 case TEVENT_REQ_RECEIVED:
852 /*
853 * Make sure we really remove it from
854 * the pending array on destruction.
855 */
856 state->smb1.mid = 0;
857 smbXcli_req_unset_pending(req);
858 return;
859 default:
860 return;
861 }
862 }
863
864 static bool smb1cli_req_cancel(struct tevent_req *req);
865 static bool smb2cli_req_cancel(struct tevent_req *req);
866
867 static bool smbXcli_req_cancel(struct tevent_req *req)
868 {
869 struct smbXcli_req_state *state =
870 tevent_req_data(req,
871 struct smbXcli_req_state);
872
873 if (!smbXcli_conn_is_connected(state->conn)) {
874 return false;
875 }
876
877 if (state->conn->protocol == PROTOCOL_NONE) {
878 return false;
879 }
880
881 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
882 return smb2cli_req_cancel(req);
883 }
884
885 return smb1cli_req_cancel(req);
886 }
887
888 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
889
890 bool smbXcli_req_set_pending(struct tevent_req *req)
891 {
892 struct smbXcli_req_state *state =
893 tevent_req_data(req,
894 struct smbXcli_req_state);
895 struct smbXcli_conn *conn;
896 struct tevent_req **pending;
897 size_t num_pending;
898
899 conn = state->conn;
900
901 if (!smbXcli_conn_is_connected(conn)) {
902 return false;
903 }
904
905 num_pending = talloc_array_length(conn->pending);
906
907 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
908 num_pending+1);
909 if (pending == NULL) {
910 return false;
911 }
912 pending[num_pending] = req;
913 conn->pending = pending;
914 tevent_req_set_cleanup_fn(req, smbXcli_req_cleanup);
915 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
916
917 if (!smbXcli_conn_receive_next(conn)) {
918 /*
919 * the caller should notify the current request
920 *
921 * And all other pending requests get notified
922 * by smbXcli_conn_disconnect().
923 */
924 smbXcli_req_unset_pending(req);
925 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
926 return false;
927 }
928
929 return true;
930 }
931
932 static void smbXcli_conn_received(struct tevent_req *subreq);
933
934 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
935 {
936 size_t num_pending = talloc_array_length(conn->pending);
937 struct tevent_req *req;
938 struct smbXcli_req_state *state;
939
940 if (conn->read_smb_req != NULL) {
941 return true;
942 }
943
944 if (num_pending == 0) {
945 if (conn->smb2.mid < UINT64_MAX) {
946 /* no more pending requests, so we are done for now */
947 return true;
948 }
949
950 /*
951 * If there are no more SMB2 requests possible,
952 * because we are out of message ids,
953 * we need to disconnect.
954 */
955 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
956 return true;
957 }
958
959 req = conn->pending[0];
960 state = tevent_req_data(req, struct smbXcli_req_state);
961
962 /*
963 * We're the first ones, add the read_smb request that waits for the
964 * answer from the server
965 */
966 conn->read_smb_req = read_smb_send(conn->pending,
967 state->ev,
968 conn->read_fd);
969 if (conn->read_smb_req == NULL) {
970 return false;
971 }
972 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
973 return true;
974 }
975
976 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
977 {
978 struct smbXcli_session *session;
979
980 tevent_queue_stop(conn->outgoing);
981
982 if (conn->read_fd != -1) {
983 close(conn->read_fd);
984 }
985 if (conn->write_fd != -1) {
986 close(conn->write_fd);
987 }
988 conn->read_fd = -1;
989 conn->write_fd = -1;
990
991 session = conn->sessions;
992 if (talloc_array_length(conn->pending) == 0) {
993 /*
994 * if we do not have pending requests
995 * there is no need to update the channel_sequence
996 */
997 session = NULL;
998 }
999 for (; session; session = session->next) {
1000 smb2cli_session_increment_channel_sequence(session);
1001 }
1002
1003 /*
1004 * Cancel all pending requests. We do not do a for-loop walking
1005 * conn->pending because that array changes in
1006 * smbXcli_req_unset_pending.
1007 */
1008 while (talloc_array_length(conn->pending) > 0) {
1009 struct tevent_req *req;
1010 struct smbXcli_req_state *state;
1011 struct tevent_req **chain;
1012 size_t num_chained;
1013 size_t i;
1014
1015 req = conn->pending[0];
1016 state = tevent_req_data(req, struct smbXcli_req_state);
1017
1018 if (state->smb1.chained_requests == NULL) {
1019 /*
1020 * We're dead. No point waiting for trans2
1021 * replies.
1022 */
1023 state->smb1.mid = 0;
1024
1025 smbXcli_req_unset_pending(req);
1026
1027 if (NT_STATUS_IS_OK(status)) {
1028 /* do not notify the callers */
1029 continue;
1030 }
1031
1032 /*
1033 * we need to defer the callback, because we may notify
1034 * more then one caller.
1035 */
1036 tevent_req_defer_callback(req, state->ev);
1037 tevent_req_nterror(req, status);
1038 continue;
1039 }
1040
1041 chain = talloc_move(conn, &state->smb1.chained_requests);
1042 num_chained = talloc_array_length(chain);
1043
1044 for (i=0; i<num_chained; i++) {
1045 req = chain[i];
1046 state = tevent_req_data(req, struct smbXcli_req_state);
1047
1048 /*
1049 * We're dead. No point waiting for trans2
1050 * replies.
1051 */
1052 state->smb1.mid = 0;
1053
1054 smbXcli_req_unset_pending(req);
1055
1056 if (NT_STATUS_IS_OK(status)) {
1057 /* do not notify the callers */
1058 continue;
1059 }
1060
1061 /*
1062 * we need to defer the callback, because we may notify
1063 * more than one caller.
1064 */
1065 tevent_req_defer_callback(req, state->ev);
1066 tevent_req_nterror(req, status);
1067 }
1068 TALLOC_FREE(chain);
1069 }
1070 }
1071
1072 /*
1073 * Fetch a smb request's mid. Only valid after the request has been sent by
1074 * smb1cli_req_send().
1075 */
1076 uint16_t smb1cli_req_mid(struct tevent_req *req)
1077 {
1078 struct smbXcli_req_state *state =
1079 tevent_req_data(req,
1080 struct smbXcli_req_state);
1081
1082 if (state->smb1.mid != 0) {
1083 return state->smb1.mid;
1084 }
1085
1086 return SVAL(state->smb1.hdr, HDR_MID);
1087 }
1088
1089 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1090 {
1091 struct smbXcli_req_state *state =
1092 tevent_req_data(req,
1093 struct smbXcli_req_state);
1094
1095 state->smb1.mid = mid;
1096 }
1097
1098 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1099 {
1100 struct smbXcli_req_state *state =
1101 tevent_req_data(req,
1102 struct smbXcli_req_state);
1103
1104 return state->smb1.seqnum;
1105 }
1106
1107 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1108 {
1109 struct smbXcli_req_state *state =
1110 tevent_req_data(req,
1111 struct smbXcli_req_state);
1112
1113 state->smb1.seqnum = seqnum;
1114 }
1115
1116 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1117 {
1118 size_t result = 0;
1119 int i;
1120 for (i=0; i<count; i++) {
1121 result += iov[i].iov_len;
1122 }
1123 return result;
1124 }
1125
1126 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1127 const struct iovec *iov,
1128 int count)
1129 {
1130 size_t len = smbXcli_iov_len(iov, count);
1131 size_t copied;
1132 uint8_t *buf;
1133 int i;
1134
1135 buf = talloc_array(mem_ctx, uint8_t, len);
1136 if (buf == NULL) {
1137 return NULL;
1138 }
1139 copied = 0;
1140 for (i=0; i<count; i++) {
1141 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
1142 copied += iov[i].iov_len;
1143 }
1144 return buf;
1145 }
1146
1147 static void smb1cli_req_flags(enum protocol_types protocol,
1148 uint32_t smb1_capabilities,
1149 uint8_t smb_command,
1150 uint8_t additional_flags,
1151 uint8_t clear_flags,
1152 uint8_t *_flags,
1153 uint16_t additional_flags2,
1154 uint16_t clear_flags2,
1155 uint16_t *_flags2)
1156 {
1157 uint8_t flags = 0;
1158 uint16_t flags2 = 0;
1159
1160 if (protocol >= PROTOCOL_LANMAN1) {
1161 flags |= FLAG_CASELESS_PATHNAMES;
1162 flags |= FLAG_CANONICAL_PATHNAMES;
1163 }
1164
1165 if (protocol >= PROTOCOL_LANMAN2) {
1166 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1167 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1168 }
1169
1170 if (protocol >= PROTOCOL_NT1) {
1171 flags2 |= FLAGS2_IS_LONG_NAME;
1172
1173 if (smb1_capabilities & CAP_UNICODE) {
1174 flags2 |= FLAGS2_UNICODE_STRINGS;
1175 }
1176 if (smb1_capabilities & CAP_STATUS32) {
1177 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1178 }
1179 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1180 flags2 |= FLAGS2_EXTENDED_SECURITY;
1181 }
1182 }
1183
1184 flags |= additional_flags;
1185 flags &= ~clear_flags;
1186 flags2 |= additional_flags2;
1187 flags2 &= ~clear_flags2;
1188
1189 *_flags = flags;
1190 *_flags2 = flags2;
1191 }
1192
1193 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1194
1195 static bool smb1cli_req_cancel(struct tevent_req *req)
1196 {
1197 struct smbXcli_req_state *state =
1198 tevent_req_data(req,
1199 struct smbXcli_req_state);
1200 uint8_t flags;
1201 uint16_t flags2;
1202 uint32_t pid;
1203 uint16_t mid;
1204 struct tevent_req *subreq;
1205 NTSTATUS status;
1206
1207 flags = CVAL(state->smb1.hdr, HDR_FLG);
1208 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1209 pid = SVAL(state->smb1.hdr, HDR_PID);
1210 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1211 mid = SVAL(state->smb1.hdr, HDR_MID);
1212
1213 subreq = smb1cli_req_create(state, state->ev,
1214 state->conn,
1215 SMBntcancel,
1216 flags, 0,
1217 flags2, 0,
1218 0, /* timeout */
1219 pid,
1220 state->tcon,
1221 state->session,
1222 0, NULL, /* vwv */
1223 0, NULL); /* bytes */
1224 if (subreq == NULL) {
1225 return false;
1226 }
1227 smb1cli_req_set_mid(subreq, mid);
1228
1229 status = smb1cli_req_chain_submit(&subreq, 1);
1230 if (!NT_STATUS_IS_OK(status)) {
1231 TALLOC_FREE(subreq);
1232 return false;
1233 }
1234 smb1cli_req_set_mid(subreq, 0);
1235
1236 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1237
1238 return true;
1239 }
1240
1241 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1242 {
1243 /* we do not care about the result */
1244 TALLOC_FREE(subreq);
1245 }
1246
1247 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1248 struct tevent_context *ev,
1249 struct smbXcli_conn *conn,
1250 uint8_t smb_command,
1251 uint8_t additional_flags,
1252 uint8_t clear_flags,
1253 uint16_t additional_flags2,
1254 uint16_t clear_flags2,
1255 uint32_t timeout_msec,
1256 uint32_t pid,
1257 struct smbXcli_tcon *tcon,
1258 struct smbXcli_session *session,
1259 uint8_t wct, uint16_t *vwv,
1260 int iov_count,
1261 struct iovec *bytes_iov)
1262 {
1263 struct tevent_req *req;
1264 struct smbXcli_req_state *state;
1265 uint8_t flags = 0;
1266 uint16_t flags2 = 0;
1267 uint16_t uid = 0;
1268 uint16_t tid = 0;
1269
1270 if (iov_count > MAX_SMB_IOV) {
1271 /*
1272 * Should not happen :-)
1273 */
1274 return NULL;
1275 }
1276
1277 req = tevent_req_create(mem_ctx, &state,
1278 struct smbXcli_req_state);
1279 if (req == NULL) {
1280 return NULL;
1281 }
1282 state->ev = ev;
1283 state->conn = conn;
1284 state->session = session;
1285 state->tcon = tcon;
1286
1287 if (session) {
1288 uid = session->smb1.session_id;
1289 }
1290
1291 if (tcon) {
1292 tid = tcon->smb1.tcon_id;
1293
1294 if (tcon->fs_attributes & FILE_CASE_SENSITIVE_SEARCH) {
1295 clear_flags |= FLAG_CASELESS_PATHNAMES;
1296 } else {
1297 /* Default setting, case insensitive. */
1298 additional_flags |= FLAG_CASELESS_PATHNAMES;
1299 }
1300
1301 if (smbXcli_conn_dfs_supported(conn) &&
1302 smbXcli_tcon_is_dfs_share(tcon))
1303 {
1304 additional_flags2 |= FLAGS2_DFS_PATHNAMES;
1305 }
1306 }
1307
1308 state->smb1.recv_cmd = 0xFF;
1309 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1310 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1311 if (state->smb1.recv_iov == NULL) {
1312 TALLOC_FREE(req);
1313 return NULL;
1314 }
1315
1316 smb1cli_req_flags(conn->protocol,
1317 conn->smb1.capabilities,
1318 smb_command,
1319 additional_flags,
1320 clear_flags,
1321 &flags,
1322 additional_flags2,
1323 clear_flags2,
1324 &flags2);
1325
1326 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1327 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1328 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1329 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1330 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1331 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1332 SSVAL(state->smb1.hdr, HDR_TID, tid);
1333 SSVAL(state->smb1.hdr, HDR_PID, pid);
1334 SSVAL(state->smb1.hdr, HDR_UID, uid);
1335 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1336 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1337
1338 state->smb1.vwv = vwv;
1339
1340 SSVAL(state->smb1.bytecount_buf, 0, smbXcli_iov_len(bytes_iov, iov_count));
1341
1342 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1343 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1344 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1345 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1346 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1347 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1348 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1349 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1350
1351 if (iov_count != 0) {
1352 memcpy(&state->smb1.iov[4], bytes_iov,
1353 iov_count * sizeof(*bytes_iov));
1354 }
1355 state->smb1.iov_count = iov_count + 4;
1356
1357 if (timeout_msec > 0) {
1358 struct timeval endtime;
1359
1360 endtime = timeval_current_ofs_msec(timeout_msec);
1361 if (!tevent_req_set_endtime(req, ev, endtime)) {
1362 return req;
1363 }
1364 }
1365
1366 switch (smb_command) {
1367 case SMBtranss:
1368 case SMBtranss2:
1369 case SMBnttranss:
1370 state->one_way = true;
1371 break;
1372 case SMBntcancel:
1373 state->one_way = true;
1374 state->smb1.one_way_seqnum = true;
1375 break;
1376 case SMBlockingX:
1377 if ((wct == 8) &&
1378 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1379 state->one_way = true;
1380 }
1381 break;
1382 }
1383
1384 return req;
1385 }
1386
1387 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1388 struct iovec *iov, int iov_count,
1389 uint32_t *seqnum,
1390 bool one_way_seqnum)
1391 {
1392 TALLOC_CTX *frame = NULL;
1393 uint8_t *buf;
1394
1395 /*
1396 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1397 * iovec directly. MD5Update would do that just fine.
1398 */
1399
1400 if (iov_count < 4) {
1401 return NT_STATUS_INVALID_PARAMETER_MIX;
1402 }
1403 if (iov[0].iov_len != NBT_HDR_SIZE) {
1404 return NT_STATUS_INVALID_PARAMETER_MIX;
1405 }
1406 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1407 return NT_STATUS_INVALID_PARAMETER_MIX;
1408 }
1409 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1410 return NT_STATUS_INVALID_PARAMETER_MIX;
1411 }
1412 if (iov[3].iov_len != sizeof(uint16_t)) {
1413 return NT_STATUS_INVALID_PARAMETER_MIX;
1414 }
1415
1416 frame = talloc_stackframe();
1417
1418 buf = smbXcli_iov_concat(frame, &iov[1], iov_count - 1);
1419 if (buf == NULL) {
1420 return NT_STATUS_NO_MEMORY;
1421 }
1422
1423 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1424 one_way_seqnum);
1425 smb_signing_sign_pdu(conn->smb1.signing,
1426 buf, talloc_get_size(buf),
1427 *seqnum);
1428 memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1429
1430 TALLOC_FREE(frame);
1431 return NT_STATUS_OK;
1432 }
1433
1434 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1435 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1436 TALLOC_CTX *tmp_mem,
1437 uint8_t *inbuf);
1438
1439 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1440 struct smbXcli_req_state *state,
1441 struct iovec *iov, int iov_count)
1442 {
1443 struct tevent_req *subreq;
1444 NTSTATUS status;
1445 uint8_t cmd;
1446 uint16_t mid;
1447
1448 if (!smbXcli_conn_is_connected(state->conn)) {
1449 return NT_STATUS_CONNECTION_DISCONNECTED;
1450 }
1451
1452 if (state->conn->protocol > PROTOCOL_NT1) {
1453 return NT_STATUS_REVISION_MISMATCH;
1454 }
1455
1456 if (iov_count < 4) {
1457 return NT_STATUS_INVALID_PARAMETER_MIX;
1458 }
1459 if (iov[0].iov_len != NBT_HDR_SIZE) {
1460 return NT_STATUS_INVALID_PARAMETER_MIX;
1461 }
1462 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1463 return NT_STATUS_INVALID_PARAMETER_MIX;
1464 }
1465 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1466 return NT_STATUS_INVALID_PARAMETER_MIX;
1467 }
1468 if (iov[3].iov_len != sizeof(uint16_t)) {
1469 return NT_STATUS_INVALID_PARAMETER_MIX;
1470 }
1471
1472 cmd = CVAL(iov[1].iov_base, HDR_COM);
1473 if (cmd == SMBreadBraw) {
1474 if (smbXcli_conn_has_async_calls(state->conn)) {
1475 return NT_STATUS_INVALID_PARAMETER_MIX;
1476 }
1477 state->conn->smb1.read_braw_req = req;
1478 }
1479
1480 if (state->smb1.mid != 0) {
1481 mid = state->smb1.mid;
1482 } else {
1483 mid = smb1cli_alloc_mid(state->conn);
1484 }
1485 SSVAL(iov[1].iov_base, HDR_MID, mid);
1486
1487 _smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
1488
1489 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1490 &state->smb1.seqnum,
1491 state->smb1.one_way_seqnum);
1492
1493 if (!NT_STATUS_IS_OK(status)) {
1494 return status;
1495 }
1496
1497 /*
1498 * If we supported multiple encrytion contexts
1499 * here we'd look up based on tid.
1500 */
1501 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1502 char *buf, *enc_buf;
1503
1504 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1505 if (buf == NULL) {
1506 return NT_STATUS_NO_MEMORY;
1507 }
1508 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1509 (char *)buf, &enc_buf);
1510 TALLOC_FREE(buf);
1511 if (!NT_STATUS_IS_OK(status)) {
1512 DEBUG(0, ("Error in encrypting client message: %s\n",
1513 nt_errstr(status)));
1514 return status;
1515 }
1516 buf = (char *)talloc_memdup(state, enc_buf,
1517 smb_len_nbt(enc_buf)+4);
1518 SAFE_FREE(enc_buf);
1519 if (buf == NULL) {
1520 return NT_STATUS_NO_MEMORY;
1521 }
1522 iov[0].iov_base = (void *)buf;
1523 iov[0].iov_len = talloc_get_size(buf);
1524 iov_count = 1;
1525 }
1526
1527 if (state->conn->dispatch_incoming == NULL) {
1528 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1529 }
1530
1531 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1532
1533 subreq = writev_send(state, state->ev, state->conn->outgoing,
1534 state->conn->write_fd, false, iov, iov_count);
1535 if (subreq == NULL) {
1536 return NT_STATUS_NO_MEMORY;
1537 }
1538 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1539 return NT_STATUS_OK;
1540 }
1541
1542 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1543 struct tevent_context *ev,
1544 struct smbXcli_conn *conn,
1545 uint8_t smb_command,
1546 uint8_t additional_flags,
1547 uint8_t clear_flags,
1548 uint16_t additional_flags2,
1549 uint16_t clear_flags2,
1550 uint32_t timeout_msec,
1551 uint32_t pid,
1552 struct smbXcli_tcon *tcon,
1553 struct smbXcli_session *session,
1554 uint8_t wct, uint16_t *vwv,
1555 uint32_t num_bytes,
1556 const uint8_t *bytes)
1557 {
1558 struct tevent_req *req;
1559 struct iovec iov;
1560 NTSTATUS status;
1561
1562 iov.iov_base = discard_const_p(void, bytes);
1563 iov.iov_len = num_bytes;
1564
1565 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1566 additional_flags, clear_flags,
1567 additional_flags2, clear_flags2,
1568 timeout_msec,
1569 pid, tcon, session,
1570 wct, vwv, 1, &iov);
1571 if (req == NULL) {
1572 return NULL;
1573 }
1574 if (!tevent_req_is_in_progress(req)) {
1575 return tevent_req_post(req, ev);
1576 }
1577 status = smb1cli_req_chain_submit(&req, 1);
1578 if (tevent_req_nterror(req, status)) {
1579 return tevent_req_post(req, ev);
1580 }
1581 return req;
1582 }
1583
1584 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1585 {
1586 struct tevent_req *req =
1587 tevent_req_callback_data(subreq,
1588 struct tevent_req);
1589 struct smbXcli_req_state *state =
1590 tevent_req_data(req,
1591 struct smbXcli_req_state);
1592 ssize_t nwritten;
1593 int err;
1594
1595 nwritten = writev_recv(subreq, &err);
1596 TALLOC_FREE(subreq);
1597 if (nwritten == -1) {
1598 NTSTATUS status = map_nt_error_from_unix_common(err);
1599 smbXcli_conn_disconnect(state->conn, status);
1600 return;
1601 }
1602
1603 if (state->one_way) {
1604 state->inbuf = NULL;
1605 tevent_req_done(req);
1606 return;
1607 }
1608
1609 if (!smbXcli_req_set_pending(req)) {
1610 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1611 return;
1612 }
1613 }
1614
1615 static void smbXcli_conn_received(struct tevent_req *subreq)
1616 {
1617 struct smbXcli_conn *conn =
1618 tevent_req_callback_data(subreq,
1619 struct smbXcli_conn);
1620 TALLOC_CTX *frame = talloc_stackframe();
1621 NTSTATUS status;
1622 uint8_t *inbuf;
1623 ssize_t received;
1624 int err;
1625
1626 if (subreq != conn->read_smb_req) {
1627 DEBUG(1, ("Internal error: cli_smb_received called with "
1628 "unexpected subreq\n"));
1629 smbXcli_conn_disconnect(conn, NT_STATUS_INTERNAL_ERROR);
1630 TALLOC_FREE(frame);
1631 return;
1632 }
1633 conn->read_smb_req = NULL;
1634
1635 received = read_smb_recv(subreq, frame, &inbuf, &err);
1636 TALLOC_FREE(subreq);
1637 if (received == -1) {
1638 status = map_nt_error_from_unix_common(err);
1639 smbXcli_conn_disconnect(conn, status);
1640 TALLOC_FREE(frame);
1641 return;
1642 }
1643
1644 status = conn->dispatch_incoming(conn, frame, inbuf);
1645 TALLOC_FREE(frame);
1646 if (NT_STATUS_IS_OK(status)) {
1647 /*
1648 * We should not do any more processing
1649 * as the dispatch function called
1650 * tevent_req_done().
1651 */
1652 return;
1653 }
1654
1655 if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1656 /*
1657 * We got an error, so notify all pending requests
1658 */
1659 smbXcli_conn_disconnect(conn, status);
1660 return;
1661 }
1662
1663 /*
1664 * We got NT_STATUS_RETRY, so we may ask for a
1665 * next incoming pdu.
1666 */
1667 if (!smbXcli_conn_receive_next(conn)) {
1668 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1669 }
1670 }
1671
1672 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1673 struct iovec **piov, int *pnum_iov)
1674 {
1675 struct iovec *iov;
1676 int num_iov;
1677 size_t buflen;
1678 size_t taken;
1679 size_t remaining;
1680 uint8_t *hdr;
1681 uint8_t cmd;
1682 uint32_t wct_ofs;
1683 NTSTATUS status;
1684 size_t min_size = MIN_SMB_SIZE;
1685
1686 buflen = smb_len_tcp(buf);
1687 taken = 0;
1688
1689 hdr = buf + NBT_HDR_SIZE;
1690
1691 status = smb1cli_pull_raw_error(hdr);
1692 if (NT_STATUS_IS_ERR(status)) {
1693 /*
1694 * This is an ugly hack to support OS/2
1695 * which skips the byte_count in the DATA block
1696 * on some error responses.
1697 *
1698 * See bug #9096
1699 */
1700 min_size -= sizeof(uint16_t);
1701 }
1702
1703 if (buflen < min_size) {
1704 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1705 }
1706
1707 /*
1708 * This returns iovec elements in the following order:
1709 *
1710 * - SMB header
1711 *
1712 * - Parameter Block
1713 * - Data Block
1714 *
1715 * - Parameter Block
1716 * - Data Block
1717 *
1718 * - Parameter Block
1719 * - Data Block
1720 */
1721 num_iov = 1;
1722
1723 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1724 if (iov == NULL) {
1725 return NT_STATUS_NO_MEMORY;
1726 }
1727 iov[0].iov_base = hdr;
1728 iov[0].iov_len = HDR_WCT;
1729 taken += HDR_WCT;
1730
1731 cmd = CVAL(hdr, HDR_COM);
1732 wct_ofs = HDR_WCT;
1733
1734 while (true) {
1735 size_t len = buflen - taken;
1736 struct iovec *cur;
1737 struct iovec *iov_tmp;
1738 uint8_t wct;
1739 uint32_t bcc_ofs;
1740 uint16_t bcc;
1741 size_t needed;
1742
1743 /*
1744 * we need at least WCT
1745 */
1746 needed = sizeof(uint8_t);
1747 if (len < needed) {
1748 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1749 __location__, (int)len, (int)needed));
1750 goto inval;
1751 }
1752
1753 /*
1754 * Now we check if the specified words are there
1755 */
1756 wct = CVAL(hdr, wct_ofs);
1757 needed += wct * sizeof(uint16_t);
1758 if (len < needed) {
1759 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1760 __location__, (int)len, (int)needed));
1761 goto inval;
1762 }
1763
1764 if ((num_iov == 1) &&
1765 (len == needed) &&
1766 NT_STATUS_IS_ERR(status))
1767 {
1768 /*
1769 * This is an ugly hack to support OS/2
1770 * which skips the byte_count in the DATA block
1771 * on some error responses.
1772 *
1773 * See bug #9096
1774 */
1775 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1776 num_iov + 2);
1777 if (iov_tmp == NULL) {
1778 TALLOC_FREE(iov);
1779 return NT_STATUS_NO_MEMORY;
1780 }
1781 iov = iov_tmp;
1782 cur = &iov[num_iov];
1783 num_iov += 2;
1784
1785 cur[0].iov_len = 0;
1786 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1787 cur[1].iov_len = 0;
1788 cur[1].iov_base = cur[0].iov_base;
1789
1790 taken += needed;
1791 break;
1792 }
1793
1794 /*
1795 * we need at least BCC
1796 */
1797 needed += sizeof(uint16_t);
1798 if (len < needed) {
1799 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1800 __location__, (int)len, (int)needed));
1801 goto inval;
1802 }
1803
1804 /*
1805 * Now we check if the specified bytes are there
1806 */
1807 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1808 bcc = SVAL(hdr, bcc_ofs);
1809 needed += bcc * sizeof(uint8_t);
1810 if (len < needed) {
1811 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1812 __location__, (int)len, (int)needed));
1813 goto inval;
1814 }
1815
1816 /*
1817 * we allocate 2 iovec structures for words and bytes
1818 */
1819 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1820 num_iov + 2);
1821 if (iov_tmp == NULL) {
1822 TALLOC_FREE(iov);
1823 return NT_STATUS_NO_MEMORY;
1824 }
1825 iov = iov_tmp;
1826 cur = &iov[num_iov];
1827 num_iov += 2;
1828
1829 cur[0].iov_len = wct * sizeof(uint16_t);
1830 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1831 cur[1].iov_len = bcc * sizeof(uint8_t);
1832 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1833
1834 taken += needed;
1835
1836 if (!smb1cli_is_andx_req(cmd)) {
1837 /*
1838 * If the current command does not have AndX chanining
1839 * we are done.
1840 */
1841 break;
1842 }
1843
1844 if (wct == 0 && bcc == 0) {
1845 /*
1846 * An empty response also ends the chain,
1847 * most likely with an error.
1848 */
1849 break;
1850 }
1851
1852 if (wct < 2) {
1853 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1854 __location__, (int)wct, (int)cmd));
1855 goto inval;
1856 }
1857 cmd = CVAL(cur[0].iov_base, 0);
1858 if (cmd == 0xFF) {
1859 /*
1860 * If it is the end of the chain we are also done.
1861 */
1862 break;
1863 }
1864 wct_ofs = SVAL(cur[0].iov_base, 2);
1865
1866 if (wct_ofs < taken) {
1867 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1868 }
1869 if (wct_ofs > buflen) {
1870 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1871 }
1872
1873 /*
1874 * we consumed everything up to the start of the next
1875 * parameter block.
1876 */
1877 taken = wct_ofs;
1878 }
1879
1880 remaining = buflen - taken;
1881
1882 if (remaining > 0 && num_iov >= 3) {
1883 /*
1884 * The last DATA block gets the remaining
1885 * bytes, this is needed to support
1886 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1887 */
1888 iov[num_iov-1].iov_len += remaining;
1889 }
1890
1891 *piov = iov;
1892 *pnum_iov = num_iov;
1893 return NT_STATUS_OK;
1894
1895 inval:
1896 TALLOC_FREE(iov);
1897 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1898 }
1899
1900 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1901 TALLOC_CTX *tmp_mem,
1902 uint8_t *inbuf)
1903 {
1904 struct tevent_req *req;
1905 struct smbXcli_req_state *state;
1906 NTSTATUS status;
1907 size_t num_pending;
1908 size_t i;
1909 uint8_t cmd;
1910 uint16_t mid;
1911 bool oplock_break;
1912 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1913 size_t len = smb_len_tcp(inbuf);
1914 struct iovec *iov = NULL;
1915 int num_iov = 0;
1916 struct tevent_req **chain = NULL;
1917 size_t num_chained = 0;
1918 size_t num_responses = 0;
1919
1920 if (conn->smb1.read_braw_req != NULL) {
1921 req = conn->smb1.read_braw_req;
1922 conn->smb1.read_braw_req = NULL;
1923 state = tevent_req_data(req, struct smbXcli_req_state);
1924
1925 smbXcli_req_unset_pending(req);
1926
1927 if (state->smb1.recv_iov == NULL) {
1928 /*
1929 * For requests with more than
1930 * one response, we have to readd the
1931 * recv_iov array.
1932 */
1933 state->smb1.recv_iov = talloc_zero_array(state,
1934 struct iovec,
1935 3);
1936 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1937 return NT_STATUS_OK;
1938 }
1939 }
1940
1941 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
1942 state->smb1.recv_iov[0].iov_len = len;
1943 ZERO_STRUCT(state->smb1.recv_iov[1]);
1944 ZERO_STRUCT(state->smb1.recv_iov[2]);
1945
1946 state->smb1.recv_cmd = SMBreadBraw;
1947 state->smb1.recv_status = NT_STATUS_OK;
1948 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1949
1950 tevent_req_done(req);
1951 return NT_STATUS_OK;
1952 }
1953
1954 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1955 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1956 DEBUG(10, ("Got non-SMB PDU\n"));
1957 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1958 }
1959
1960 /*
1961 * If we supported multiple encrytion contexts
1962 * here we'd look up based on tid.
1963 */
1964 if (common_encryption_on(conn->smb1.trans_enc)
1965 && (CVAL(inbuf, 0) == 0)) {
1966 uint16_t enc_ctx_num;
1967
1968 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1969 if (!NT_STATUS_IS_OK(status)) {
1970 DEBUG(10, ("get_enc_ctx_num returned %s\n",
1971 nt_errstr(status)));
1972 return status;
1973 }
1974
1975 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1976 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1977 enc_ctx_num,
1978 conn->smb1.trans_enc->enc_ctx_num));
1979 return NT_STATUS_INVALID_HANDLE;
1980 }
1981
1982 status = common_decrypt_buffer(conn->smb1.trans_enc,
1983 (char *)inbuf);
1984 if (!NT_STATUS_IS_OK(status)) {
1985 DEBUG(10, ("common_decrypt_buffer returned %s\n",
1986 nt_errstr(status)));
1987 return status;
1988 }
1989 inhdr = inbuf + NBT_HDR_SIZE;
1990 len = smb_len_nbt(inbuf);
1991 }
1992
1993 mid = SVAL(inhdr, HDR_MID);
1994 num_pending = talloc_array_length(conn->pending);
1995
1996 for (i=0; i<num_pending; i++) {
1997 if (mid == smb1cli_req_mid(conn->pending[i])) {
1998 break;
1999 }
2000 }
2001 if (i == num_pending) {
2002 /* Dump unexpected reply */
2003 return NT_STATUS_RETRY;
2004 }
2005
2006 oplock_break = false;
2007
2008 if (mid == 0xffff) {
2009 /*
2010 * Paranoia checks that this is really an oplock break request.
2011 */
2012 oplock_break = (len == 51); /* hdr + 8 words */
2013 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
2014 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
2015 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
2016 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
2017
2018 if (!oplock_break) {
2019 /* Dump unexpected reply */
2020 return NT_STATUS_RETRY;
2021 }
2022 }
2023
2024 req = conn->pending[i];
2025 state = tevent_req_data(req, struct smbXcli_req_state);
2026
2027 if (!oplock_break /* oplock breaks are not signed */
2028 && !smb_signing_check_pdu(conn->smb1.signing,
2029 inhdr, len, state->smb1.seqnum+1)) {
2030 DEBUG(10, ("cli_check_sign_mac failed\n"));
2031 return NT_STATUS_ACCESS_DENIED;
2032 }
2033
2034 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
2035 &iov, &num_iov);
2036 if (!NT_STATUS_IS_OK(status)) {
2037 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
2038 nt_errstr(status)));
2039 return status;
2040 }
2041
2042 cmd = CVAL(inhdr, HDR_COM);
2043 status = smb1cli_pull_raw_error(inhdr);
2044
2045 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
2046 (state->session != NULL) && state->session->disconnect_expired)
2047 {
2048 /*
2049 * this should be a short term hack
2050 * until the upper layers have implemented
2051 * re-authentication.
2052 */
2053 return status;
2054 }
2055
2056 if (state->smb1.chained_requests == NULL) {
2057 if (num_iov != 3) {
2058 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2059 }
2060
2061 smbXcli_req_unset_pending(req);
2062
2063 if (state->smb1.recv_iov == NULL) {
2064 /*
2065 * For requests with more than
2066 * one response, we have to readd the
2067 * recv_iov array.
2068 */
2069 state->smb1.recv_iov = talloc_zero_array(state,
2070 struct iovec,
2071 3);
2072 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2073 return NT_STATUS_OK;
2074 }
2075 }
2076
2077 state->smb1.recv_cmd = cmd;
2078 state->smb1.recv_status = status;
2079 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2080
2081 state->smb1.recv_iov[0] = iov[0];
2082 state->smb1.recv_iov[1] = iov[1];
2083 state->smb1.recv_iov[2] = iov[2];
2084
2085 if (talloc_array_length(conn->pending) == 0) {
2086 tevent_req_done(req);
2087 return NT_STATUS_OK;
2088 }
2089
2090 tevent_req_defer_callback(req, state->ev);
2091 tevent_req_done(req);
2092 return NT_STATUS_RETRY;
2093 }
2094
2095 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2096 num_chained = talloc_array_length(chain);
2097 num_responses = (num_iov - 1)/2;
2098
2099 if (num_responses > num_chained) {
2100 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2101 }
2102
2103 for (i=0; i<num_chained; i++) {
2104 size_t iov_idx = 1 + (i*2);
2105 struct iovec *cur = &iov[iov_idx];
2106 uint8_t *inbuf_ref;
2107
2108 req = chain[i];
2109 state = tevent_req_data(req, struct smbXcli_req_state);
2110
2111 smbXcli_req_unset_pending(req);
2112
2113 /*
2114 * as we finish multiple requests here
2115 * we need to defer the callbacks as
2116 * they could destroy our current stack state.
2117 */
2118 tevent_req_defer_callback(req, state->ev);
2119
2120 if (i >= num_responses) {
2121 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2122 continue;
2123 }
2124
2125 if (state->smb1.recv_iov == NULL) {
2126 /*
2127 * For requests with more than
2128 * one response, we have to readd the
2129 * recv_iov array.
2130 */
2131 state->smb1.recv_iov = talloc_zero_array(state,
2132 struct iovec,
2133 3);
2134 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2135 continue;
2136 }
2137 }
2138
2139 state->smb1.recv_cmd = cmd;
2140
2141 if (i == (num_responses - 1)) {
2142 /*
2143 * The last request in the chain gets the status
2144 */
2145 state->smb1.recv_status = status;
2146 } else {
2147 cmd = CVAL(cur[0].iov_base, 0);
2148 state->smb1.recv_status = NT_STATUS_OK;
2149 }
2150
2151 state->inbuf = inbuf;
2152
2153 /*
2154 * Note: here we use talloc_reference() in a way
2155 * that does not expose it to the caller.
2156 */
2157 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2158 if (tevent_req_nomem(inbuf_ref, req)) {
2159 continue;
2160 }
2161
2162 /* copy the related buffers */
2163 state->smb1.recv_iov[0] = iov[0];
2164 state->smb1.recv_iov[1] = cur[0];
2165 state->smb1.recv_iov[2] = cur[1];
2166
2167 tevent_req_done(req);
2168 }
2169
2170 return NT_STATUS_RETRY;
2171 }
2172
2173 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2174 TALLOC_CTX *mem_ctx,
2175 struct iovec **piov,
2176 uint8_t **phdr,
2177 uint8_t *pwct,
2178 uint16_t **pvwv,
2179 uint32_t *pvwv_offset,
2180 uint32_t *pnum_bytes,
2181 uint8_t **pbytes,
2182 uint32_t *pbytes_offset,
2183 uint8_t **pinbuf,
2184 const struct smb1cli_req_expected_response *expected,
2185 size_t num_expected)
2186 {
2187 struct smbXcli_req_state *state =
2188 tevent_req_data(req,
2189 struct smbXcli_req_state);
2190 NTSTATUS status = NT_STATUS_OK;
2191 struct iovec *recv_iov = NULL;
2192 uint8_t *hdr = NULL;
2193 uint8_t wct = 0;
2194 uint32_t vwv_offset = 0;
2195 uint16_t *vwv = NULL;
2196 uint32_t num_bytes = 0;
2197 uint32_t bytes_offset = 0;
2198 uint8_t *bytes = NULL;
2199 size_t i;
2200 bool found_status = false;
2201 bool found_size = false;
2202
2203 if (piov != NULL) {
2204 *piov = NULL;
2205 }
2206 if (phdr != NULL) {
2207 *phdr = 0;
2208 }
2209 if (pwct != NULL) {
2210 *pwct = 0;
2211 }
2212 if (pvwv != NULL) {
2213 *pvwv = NULL;
2214 }
2215 if (pvwv_offset != NULL) {
2216 *pvwv_offset = 0;
2217 }
2218 if (pnum_bytes != NULL) {
2219 *pnum_bytes = 0;
2220 }
2221 if (pbytes != NULL) {
2222 *pbytes = NULL;
2223 }
2224 if (pbytes_offset != NULL) {
2225 *pbytes_offset = 0;
2226 }
2227 if (pinbuf != NULL) {
2228 *pinbuf = NULL;
2229 }
2230
2231 if (state->inbuf != NULL) {
2232 recv_iov = state->smb1.recv_iov;
2233 state->smb1.recv_iov = NULL;
2234 if (state->smb1.recv_cmd != SMBreadBraw) {
2235 hdr = (uint8_t *)recv_iov[0].iov_base;
2236 wct = recv_iov[1].iov_len/2;
2237 vwv = (uint16_t *)recv_iov[1].iov_base;
2238 vwv_offset = PTR_DIFF(vwv, hdr);
2239 num_bytes = recv_iov[2].iov_len;
2240 bytes = (uint8_t *)recv_iov[2].iov_base;
2241 bytes_offset = PTR_DIFF(bytes, hdr);
2242 }
2243 }
2244
2245 if (tevent_req_is_nterror(req, &status)) {
2246 for (i=0; i < num_expected; i++) {
2247 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2248 found_status = true;
2249 break;
2250 }
2251 }
2252
2253 if (found_status) {
2254 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2255 }
2256
2257 return status;
2258 }
2259
2260 if (num_expected == 0) {
2261 found_status = true;
2262 found_size = true;
2263 }
2264
2265 status = state->smb1.recv_status;
2266
2267 for (i=0; i < num_expected; i++) {
2268 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2269 continue;
2270 }
2271
2272 found_status = true;
2273 if (expected[i].wct == 0) {
2274 found_size = true;
2275 break;
2276 }
2277
2278 if (expected[i].wct == wct) {
2279 found_size = true;
2280 break;
2281 }
2282 }
2283
2284 if (!found_status) {
2285 return status;
2286 }
2287
2288 if (!found_size) {
2289 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2290 }
2291
2292 if (piov != NULL) {
2293 *piov = talloc_move(mem_ctx, &recv_iov);
2294 }
2295
2296 if (phdr != NULL) {
2297 *phdr = hdr;
2298 }
2299 if (pwct != NULL) {
2300 *pwct = wct;
2301 }
2302 if (pvwv != NULL) {
2303 *pvwv = vwv;
2304 }
2305 if (pvwv_offset != NULL) {
2306 *pvwv_offset = vwv_offset;
2307 }
2308 if (pnum_bytes != NULL) {
2309 *pnum_bytes = num_bytes;
2310 }
2311 if (pbytes != NULL) {
2312 *pbytes = bytes;
2313 }
2314 if (pbytes_offset != NULL) {
2315 *pbytes_offset = bytes_offset;
2316 }
2317 if (pinbuf != NULL) {
2318 *pinbuf = state->inbuf;
2319 }
2320
2321 return status;
2322 }
2323
2324 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2325 {
2326 size_t wct_ofs;
2327 int i;
2328
2329 wct_ofs = HDR_WCT;
2330
2331 for (i=0; i<num_reqs; i++) {
2332 struct smbXcli_req_state *state;
2333 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2334 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2335 state->smb1.iov_count-2);
2336 wct_ofs = (wct_ofs + 3) & ~3;
2337 }
2338 return wct_ofs;
2339 }
2340
2341 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2342 {
2343 struct smbXcli_req_state *first_state =
2344 tevent_req_data(reqs[0],
2345 struct smbXcli_req_state);
2346 struct smbXcli_req_state *state;
2347 size_t wct_offset;
2348 size_t chain_padding = 0;
2349 int i, iovlen;
2350 struct iovec *iov = NULL;
2351 struct iovec *this_iov;
2352 NTSTATUS status;
2353 size_t nbt_len;
2354
2355 if (num_reqs == 1) {
2356 return smb1cli_req_writev_submit(reqs[0], first_state,
2357 first_state->smb1.iov,
2358 first_state->smb1.iov_count);
2359 }
2360
2361 iovlen = 0;
2362 for (i=0; i<num_reqs; i++) {
2363 if (!tevent_req_is_in_progress(reqs[i])) {
2364 return NT_STATUS_INTERNAL_ERROR;
2365 }
2366
2367 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2368
2369 if (state->smb1.iov_count < 4) {
2370 return NT_STATUS_INVALID_PARAMETER_MIX;
2371 }
2372
2373 if (i == 0) {
2374 /*
2375 * The NBT and SMB header
2376 */
2377 iovlen += 2;
2378 } else {
2379 /*
2380 * Chain padding
2381 */
2382 iovlen += 1;
2383 }
2384
2385 /*
2386 * words and bytes
2387 */
2388 iovlen += state->smb1.iov_count - 2;
2389 }
2390
2391 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2392 if (iov == NULL) {
2393 return NT_STATUS_NO_MEMORY;
2394 }
2395
2396 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2397 first_state, reqs, sizeof(*reqs) * num_reqs);
2398 if (first_state->smb1.chained_requests == NULL) {
2399 TALLOC_FREE(iov);
2400 return NT_STATUS_NO_MEMORY;
2401 }
2402
2403 wct_offset = HDR_WCT;
2404 this_iov = iov;
2405
2406 for (i=0; i<num_reqs; i++) {
2407 size_t next_padding = 0;
2408 uint16_t *vwv;
2409
2410 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2411
2412 if (i < num_reqs-1) {
2413 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2414 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2415 TALLOC_FREE(iov);
2416 TALLOC_FREE(first_state->smb1.chained_requests);
2417 return NT_STATUS_INVALID_PARAMETER_MIX;
2418 }
2419 }
2420
2421 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2422 state->smb1.iov_count-2) + 1;
2423 if ((wct_offset % 4) != 0) {
2424 next_padding = 4 - (wct_offset % 4);
2425 }
2426 wct_offset += next_padding;
2427 vwv = state->smb1.vwv;
2428
2429 if (i < num_reqs-1) {
2430 struct smbXcli_req_state *next_state =
2431 tevent_req_data(reqs[i+1],
2432 struct smbXcli_req_state);
2433 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2434 SCVAL(vwv+0, 1, 0);
2435 SSVAL(vwv+1, 0, wct_offset);
2436 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2437 /* properly end the chain */
2438 SCVAL(vwv+0, 0, 0xff);
2439 SCVAL(vwv+0, 1, 0xff);
2440 SSVAL(vwv+1, 0, 0);
2441 }
2442
2443 if (i == 0) {
2444 /*
2445 * The NBT and SMB header
2446 */
2447 this_iov[0] = state->smb1.iov[0];
2448 this_iov[1] = state->smb1.iov[1];
2449 this_iov += 2;
2450 } else {
2451 /*
2452 * This one is a bit subtle. We have to add
2453 * chain_padding bytes between the requests, and we
2454 * have to also include the wct field of the
2455 * subsequent requests. We use the subsequent header
2456 * for the padding, it contains the wct field in its
2457 * last byte.
2458 */
2459 this_iov[0].iov_len = chain_padding+1;
2460 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2461 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2462 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2463 this_iov += 1;
2464 }
2465
2466 /*
2467 * copy the words and bytes
2468 */
2469 memcpy(this_iov, state->smb1.iov+2,
2470 sizeof(struct iovec) * (state->smb1.iov_count-2));
2471 this_iov += state->smb1.iov_count - 2;
2472 chain_padding = next_padding;
2473 }
2474
2475 nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
2476 if (nbt_len > first_state->conn->smb1.max_xmit) {
2477 TALLOC_FREE(iov);
2478 TALLOC_FREE(first_state->smb1.chained_requests);
2479 return NT_STATUS_INVALID_PARAMETER_MIX;
2480 }
2481
2482 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2483 if (!NT_STATUS_IS_OK(status)) {
2484 TALLOC_FREE(iov);
2485 TALLOC_FREE(first_state->smb1.chained_requests);
2486 return status;
2487 }
2488
2489 return NT_STATUS_OK;
2490 }
2491
2492 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2493 {
2494 return ((tevent_queue_length(conn->outgoing) != 0)
2495 || (talloc_array_length(conn->pending) != 0));
2496 }
2497
2498 bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn)
2499 {
2500 if (conn->protocol >= PROTOCOL_SMB2_02) {
2501 return (smb2cli_conn_server_capabilities(conn) & SMB2_CAP_DFS);
2502 }
2503
2504 return (smb1cli_conn_capabilities(conn) & CAP_DFS);
2505 }
2506
2507 bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
2508 {
2509 uint16_t credits = 1;
2510
2511 if (conn->smb2.cur_credits == 0) {
2512 if (max_dyn_len != NULL) {
2513 *max_dyn_len = 0;
2514 }
2515 return false;
2516 }
2517
2518 if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2519 credits = conn->smb2.cur_credits;
2520 }
2521
2522 if (max_dyn_len != NULL) {
2523 *max_dyn_len = credits * 65536;
2524 }
2525
2526 return true;
2527 }
2528
2529 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2530 {
2531 return conn->smb2.server.capabilities;
2532 }
2533
2534 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2535 {
2536 return conn->smb2.server.security_mode;
2537 }
2538
2539 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2540 {
2541 return conn->smb2.server.max_trans_size;
2542 }
2543
2544 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2545 {
2546 return conn->smb2.server.max_read_size;
2547 }
2548
2549 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2550 {
2551 return conn->smb2.server.max_write_size;
2552 }
2553
2554 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2555 uint16_t max_credits)
2556 {
2557 conn->smb2.max_credits = max_credits;
2558 }
2559
2560 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2561
2562 static bool smb2cli_req_cancel(struct tevent_req *req)
2563 {
2564 struct smbXcli_req_state *state =
2565 tevent_req_data(req,
2566 struct smbXcli_req_state);
2567 uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2568 uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2569 uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
2570 struct smbXcli_tcon *tcon = state->tcon;
2571 struct smbXcli_session *session = state->session;
2572 uint8_t *fixed = state->smb2.pad;
2573 uint16_t fixed_len = 4;
2574 struct tevent_req *subreq;
2575 struct smbXcli_req_state *substate;
2576 NTSTATUS status;
2577
2578 SSVAL(fixed, 0, 0x04);
2579 SSVAL(fixed, 2, 0);
2580
2581 subreq = smb2cli_req_create(state, state->ev,
2582 state->conn,
2583 SMB2_OP_CANCEL,
2584 flags, 0,
2585 0, /* timeout */
2586 tcon, session,
2587 fixed, fixed_len,
2588 NULL, 0, 0);
2589 if (subreq == NULL) {
2590 return false;
2591 }
2592 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2593
2594 /*
2595 * clear everything but the SMB2_HDR_FLAG_ASYNC flag
2596 * e.g. if SMB2_HDR_FLAG_CHAINED is set we get INVALID_PARAMETER back
2597 */
2598 flags &= SMB2_HDR_FLAG_ASYNC;
2599
2600 if (flags & SMB2_HDR_FLAG_ASYNC) {
2601 mid = 0;
2602 }
2603
2604 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
2605 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2606 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
2607
2608 status = smb2cli_req_compound_submit(&subreq, 1);
2609 if (!NT_STATUS_IS_OK(status)) {
2610 TALLOC_FREE(subreq);
2611 return false;
2612 }
2613
2614 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2615
2616 return true;
2617 }
2618
2619 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2620 {
2621 /* we do not care about the result */
2622 TALLOC_FREE(subreq);
2623 }
2624
2625 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2626 struct tevent_context *ev,
2627 struct smbXcli_conn *conn,
2628 uint16_t cmd,
2629 uint32_t additional_flags,
2630 uint32_t clear_flags,
2631 uint32_t timeout_msec,
2632 struct smbXcli_tcon *tcon,
2633 struct smbXcli_session *session,
2634 const uint8_t *fixed,
2635 uint16_t fixed_len,
2636 const uint8_t *dyn,
2637 uint32_t dyn_len,
2638 uint32_t max_dyn_len)
2639 {
2640 struct tevent_req *req;
2641 struct smbXcli_req_state *state;
2642 uint32_t flags = 0;
2643 uint32_t tid = 0;
2644 uint64_t uid = 0;
2645 bool use_channel_sequence = false;
2646 uint16_t channel_sequence = 0;
2647 bool use_replay_flag = false;
2648
2649 req = tevent_req_create(mem_ctx, &state,
2650 struct smbXcli_req_state);
2651 if (req == NULL) {
2652 return NULL;
2653 }
2654
2655 state->ev = ev;
2656 state->conn = conn;
2657 state->session = session;
2658 state->tcon = tcon;
2659
2660 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2661 use_channel_sequence = true;
2662 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2663 use_channel_sequence = true;
2664 }
2665
2666 if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_00) {
2667 use_replay_flag = true;
2668 }
2669
2670 if (session) {
2671 uid = session->smb2->session_id;
2672
2673 if (use_channel_sequence) {
2674 channel_sequence = session->smb2->channel_sequence;
2675 }
2676
2677 if (use_replay_flag && session->smb2->replay_active) {
2678 additional_flags |= SMB2_HDR_FLAG_REPLAY_OPERATION;
2679 }
2680
2681 state->smb2.should_sign = session->smb2->should_sign;
2682 state->smb2.should_encrypt = session->smb2->should_encrypt;
2683
2684 if (cmd == SMB2_OP_SESSSETUP &&
2685 session->smb2_channel.signing_key.length == 0 &&
2686 session->smb2->signing_key.length != 0)
2687 {
2688 /*
2689 * a session bind needs to be signed
2690 */
2691 state->smb2.should_sign = true;
2692 }
2693
2694 if (cmd == SMB2_OP_SESSSETUP &&
2695 session->smb2_channel.signing_key.length == 0) {
2696 state->smb2.should_encrypt = false;
2697 }
2698
2699 if (additional_flags & SMB2_HDR_FLAG_SIGNED) {
2700 if (session->smb2_channel.signing_key.length == 0) {
2701 tevent_req_nterror(req, NT_STATUS_NO_USER_SESSION_KEY);
2702 return req;
2703 }
2704
2705 additional_flags &= ~SMB2_HDR_FLAG_SIGNED;
2706 state->smb2.should_sign = true;
2707 }
2708 }
2709
2710 if (tcon) {
2711 tid = tcon->smb2.tcon_id;
2712
2713 if (tcon->smb2.should_sign) {
2714 state->smb2.should_sign = true;
2715 }
2716 if (tcon->smb2.should_encrypt) {
2717 state->smb2.should_encrypt = true;
2718 }
2719 }
2720
2721 if (state->smb2.should_encrypt) {
2722 state->smb2.should_sign = false;
2723 }
2724
2725 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2726 if (state->smb2.recv_iov == NULL) {
2727 TALLOC_FREE(req);
2728 return NULL;
2729 }
2730
2731 flags |= additional_flags;
2732 flags &= ~clear_flags;
2733
2734 state->smb2.fixed = fixed;
2735 state->smb2.fixed_len = fixed_len;
2736 state->smb2.dyn = dyn;
2737 state->smb2.dyn_len = dyn_len;
2738 state->smb2.max_dyn_len = max_dyn_len;
2739
2740 if (state->smb2.should_encrypt) {
2741 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2742 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2743 }
2744
2745 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
2746 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
2747 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
2748 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
2749 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
2750 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
2751 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
2752 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
2753
2754 switch (cmd) {
2755 case SMB2_OP_CANCEL:
2756 state->one_way = true;
2757 break;
2758 case SMB2_OP_BREAK:
2759 /*
2760 * If this is a dummy request, it will have
2761 * UINT64_MAX as message id.
2762 * If we send on break acknowledgement,
2763 * this gets overwritten later.
2764 */
2765 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2766 break;
2767 }
2768
2769 if (timeout_msec > 0) {
2770 struct timeval endtime;
2771
2772 endtime = timeval_current_ofs_msec(timeout_msec);
2773 if (!tevent_req_set_endtime(req, ev, endtime)) {
2774 return req;
2775 }
2776 }
2777
2778 return req;
2779 }
2780
2781 void smb2cli_req_set_notify_async(struct tevent_req *req)
2782 {
2783 struct smbXcli_req_state *state =
2784 tevent_req_data(req,
2785 struct smbXcli_req_state);
2786
2787 state->smb2.notify_async = true;
2788 }
2789
2790 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2791 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2792 TALLOC_CTX *tmp_mem,
2793 uint8_t *inbuf);
2794
2795 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2796 int num_reqs)
2797 {
2798 struct smbXcli_req_state *state;
2799 struct tevent_req *subreq;
2800 struct iovec *iov;
2801 int i, num_iov, nbt_len;
2802 int tf_iov = -1;
2803 const DATA_BLOB *encryption_key = NULL;
2804 uint64_t encryption_session_id = 0;
2805
2806 /*
2807 * 1 for the nbt length, optional TRANSFORM
2808 * per request: HDR, fixed, dyn, padding
2809 * -1 because the last one does not need padding
2810 */
2811
2812 iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
2813 if (iov == NULL) {
2814 return NT_STATUS_NO_MEMORY;
2815 }
2816
2817 num_iov = 1;
2818 nbt_len = 0;
2819
2820 /*
2821 * the session of the first request that requires encryption
2822 * specifies the encryption key.
2823 */
2824 for (i=0; i<num_reqs; i++) {
2825 if (!tevent_req_is_in_progress(reqs[i])) {
2826 return NT_STATUS_INTERNAL_ERROR;
2827 }
2828
2829 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2830
2831 if (!smbXcli_conn_is_connected(state->conn)) {
2832 return NT_STATUS_CONNECTION_DISCONNECTED;
2833 }
2834
2835 if ((state->conn->protocol != PROTOCOL_NONE) &&
2836 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2837 return NT_STATUS_REVISION_MISMATCH;
2838 }
2839
2840 if (state->session == NULL) {
2841 continue;
2842 }
2843
2844 if (!state->smb2.should_encrypt) {
2845 continue;
2846 }
2847
2848 encryption_key = &state->session->smb2->encryption_key;
2849 if (encryption_key->length == 0) {
2850 return NT_STATUS_INVALID_PARAMETER_MIX;
2851 }
2852
2853 encryption_session_id = state->session->smb2->session_id;
2854
2855 tf_iov = num_iov;
2856 iov[num_iov].iov_base = state->smb2.transform;
2857 iov[num_iov].iov_len = sizeof(state->smb2.transform);
2858 num_iov += 1;
2859
2860 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2861 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
2862 state->session->smb2->nonce_low);
2863 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
2864 state->session->smb2->nonce_high);
2865 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
2866 encryption_session_id);
2867
2868 state->session->smb2->nonce_low += 1;
2869 if (state->session->smb2->nonce_low == 0) {
2870 state->session->smb2->nonce_high += 1;
2871 state->session->smb2->nonce_low += 1;
2872 }
2873
2874 nbt_len += SMB2_TF_HDR_SIZE;
2875 break;
2876 }
2877
2878 for (i=0; i<num_reqs; i++) {
2879 int hdr_iov;
2880 size_t reqlen;
2881 bool ret;
2882 uint16_t opcode;
2883 uint64_t avail;
2884 uint16_t charge;
2885 uint16_t credits;
2886 uint64_t mid;
2887 const DATA_BLOB *signing_key = NULL;
2888
2889 if (!tevent_req_is_in_progress(reqs[i])) {
2890 return NT_STATUS_INTERNAL_ERROR;
2891 }
2892
2893 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2894
2895 if (!smbXcli_conn_is_connected(state->conn)) {
2896 return NT_STATUS_CONNECTION_DISCONNECTED;
2897 }
2898
2899 if ((state->conn->protocol != PROTOCOL_NONE) &&
2900 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2901 return NT_STATUS_REVISION_MISMATCH;
2902 }
2903
2904 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2905 if (opcode == SMB2_OP_CANCEL) {
2906 goto skip_credits;
2907 }
2908
2909 avail = UINT64_MAX - state->conn->smb2.mid;
2910 if (avail < 1) {
2911 return NT_STATUS_CONNECTION_ABORTED;
2912 }
2913
2914 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2915 uint32_t max_dyn_len = 1;
2916
2917 max_dyn_len = MAX(max_dyn_len, state->smb2.dyn_len);
2918 max_dyn_len = MAX(max_dyn_len, state->smb2.max_dyn_len);
2919
2920 charge = (max_dyn_len - 1)/ 65536 + 1;
2921 } else {
2922 charge = 1;
2923 }
2924
2925 charge = MAX(state->smb2.credit_charge, charge);
2926
2927 avail = MIN(avail, state->conn->smb2.cur_credits);
2928 if (avail < charge) {
2929 return NT_STATUS_INTERNAL_ERROR;
2930 }
2931
2932 credits = 0;
2933 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
2934 credits = state->conn->smb2.max_credits -
2935 state->conn->smb2.cur_credits;
2936 }
2937 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
2938 credits += 1;
2939 }
2940
2941 mid = state->conn->smb2.mid;
2942 state->conn->smb2.mid += charge;
2943 state->conn->smb2.cur_credits -= charge;
2944
2945 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2946 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
2947 }
2948 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
2949 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2950
2951 skip_credits:
2952 if (state->session && encryption_key == NULL) {
2953 /*
2954 * We prefer the channel signing key if it is
2955 * already there.
2956 */
2957 if (state->smb2.should_sign) {
2958 signing_key = &state->session->smb2_channel.signing_key;
2959 }
2960
2961 /*
2962 * If it is a channel binding, we already have the main
2963 * signing key and try that one.
2964 */
2965 if (signing_key && signing_key->length == 0) {
2966 signing_key = &state->session->smb2->signing_key;
2967 }
2968
2969 /*
2970 * If we do not have any session key yet, we skip the
2971 * signing of SMB2_OP_SESSSETUP requests.
2972 */
2973 if (signing_key && signing_key->length == 0) {
2974 signing_key = NULL;
2975 }
2976 }
2977
2978 hdr_iov = num_iov;
2979 iov[num_iov].iov_base = state->smb2.hdr;
2980 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
2981 num_iov += 1;
2982
2983 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2984 iov[num_iov].iov_len = state->smb2.fixed_len;
2985 num_iov += 1;
2986
2987 if (state->smb2.dyn != NULL) {
2988 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2989 iov[num_iov].iov_len = state->smb2.dyn_len;
2990 num_iov += 1;
2991 }
2992
2993 reqlen = sizeof(state->smb2.hdr);
2994 reqlen += state->smb2.fixed_len;
2995 reqlen += state->smb2.dyn_len;
2996
2997 if (i < num_reqs-1) {
2998 if ((reqlen % 8) > 0) {
2999 uint8_t pad = 8 - (reqlen % 8);
3000 iov[num_iov].iov_base = state->smb2.pad;
3001 iov[num_iov].iov_len = pad;
3002 num_iov += 1;
3003 reqlen += pad;
3004 }
3005 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
3006 }
3007
3008 state->smb2.encryption_session_id = encryption_session_id;
3009
3010 if (signing_key != NULL) {
3011 NTSTATUS status;
3012
3013 status = smb2_signing_sign_pdu(*signing_key,
3014 state->session->conn->protocol,
3015 &iov[hdr_iov], num_iov - hdr_iov);
3016 if (!NT_STATUS_IS_OK(status)) {
3017 return status;
3018 }
3019 }
3020
3021 nbt_len += reqlen;
3022
3023 ret = smbXcli_req_set_pending(reqs[i]);
3024 if (!ret) {
3025 return NT_STATUS_NO_MEMORY;
3026 }
3027 }
3028
3029 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
3030 _smb_setlen_tcp(state->length_hdr, nbt_len);
3031 iov[0].iov_base = state->length_hdr;
3032 iov[0].iov_len = sizeof(state->length_hdr);
3033
3034 if (encryption_key != NULL) {
3035 NTSTATUS status;
3036 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
3037 uint8_t *buf;
3038 int vi;
3039
3040 buf = talloc_array(iov, uint8_t, buflen);
3041 if (buf == NULL) {
3042 return NT_STATUS_NO_MEMORY;
3043 }
3044
3045 /*
3046 * We copy the buffers before encrypting them,
3047 * this is at least currently needed for the
3048 * to keep state->smb2.hdr.
3049 *
3050 * Also the callers may expect there buffers
3051 * to be const.
3052 */
3053 for (vi = tf_iov + 1; vi < num_iov; vi++) {
3054 struct iovec *v = &iov[vi];
3055 const uint8_t *o = (const uint8_t *)v->iov_base;
3056
3057 memcpy(buf, o, v->iov_len);
3058 v->iov_base = (void *)buf;
3059 buf += v->iov_len;
3060 }
3061
3062 status = smb2_signing_encrypt_pdu(*encryption_key,
3063 state->conn->smb2.server.cipher,
3064 &iov[tf_iov], num_iov - tf_iov);
3065 if (!NT_STATUS_IS_OK(status)) {
3066 return status;
3067 }
3068 }
3069
3070 if (state->conn->dispatch_incoming == NULL) {
3071 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3072 }
3073
3074 subreq = writev_send(state, state->ev, state->conn->outgoing,
3075 state->conn->write_fd, false, iov, num_iov);
3076 if (subreq == NULL) {
3077 return NT_STATUS_NO_MEMORY;
3078 }
3079 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
3080 return NT_STATUS_OK;
3081 }
3082
3083 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
3084 {
3085 struct smbXcli_req_state *state =
3086 tevent_req_data(req,
3087 struct smbXcli_req_state);
3088
3089 state->smb2.credit_charge = charge;
3090 }
3091
3092 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
3093 struct tevent_context *ev,
3094 struct smbXcli_conn *conn,
3095 uint16_t cmd,
3096 uint32_t additional_flags,
3097 uint32_t clear_flags,
3098 uint32_t timeout_msec,
3099 struct smbXcli_tcon *tcon,
3100 struct smbXcli_session *session,
3101 const uint8_t *fixed,
3102 uint16_t fixed_len,
3103 const uint8_t *dyn,
3104 uint32_t dyn_len,
3105 uint32_t max_dyn_len)
3106 {
3107 struct tevent_req *req;
3108 NTSTATUS status;
3109
3110 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
3111 additional_flags, clear_flags,
3112 timeout_msec,
3113 tcon, session,
3114 fixed, fixed_len,
3115 dyn, dyn_len,
3116 max_dyn_len);
3117 if (req == NULL) {
3118 return NULL;
3119 }
3120 if (!tevent_req_is_in_progress(req)) {
3121 return tevent_req_post(req, ev);
3122 }
3123 status = smb2cli_req_compound_submit(&req, 1);
3124 if (tevent_req_nterror(req, status)) {
3125 return tevent_req_post(req, ev);
3126 }
3127 return req;
3128 }
3129
3130 static void smb2cli_req_writev_done(struct tevent_req *subreq)
3131 {
3132 struct tevent_req *req =
3133 tevent_req_callback_data(subreq,
3134 struct tevent_req);
3135 struct smbXcli_req_state *state =
3136 tevent_req_data(req,
3137 struct smbXcli_req_state);
3138 ssize_t nwritten;
3139 int err;
3140
3141 nwritten = writev_recv(subreq, &err);
3142 TALLOC_FREE(subreq);
3143 if (nwritten == -1) {
3144 /* here, we need to notify all pending requests */
3145 NTSTATUS status = map_nt_error_from_unix_common(err);
3146 smbXcli_conn_disconnect(state->conn, status);
3147 return;
3148 }
3149 }
3150
3151 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3152 uint8_t *buf,
3153 size_t buflen,
3154 TALLOC_CTX *mem_ctx,
3155 struct iovec **piov, int *pnum_iov)
3156 {
3157 struct iovec *iov;
3158 int num_iov = 0;
3159 size_t taken = 0;
3160 uint8_t *first_hdr = buf;
3161 size_t verified_buflen = 0;
3162 uint8_t *tf = NULL;
3163 size_t tf_len = 0;
3164
3165 iov = talloc_array(mem_ctx, struct iovec, num_iov);
3166 if (iov == NULL) {
3167 return NT_STATUS_NO_MEMORY;
3168 }
3169
3170 while (taken < buflen) {
3171 size_t len = buflen - taken;
3172 uint8_t *hdr = first_hdr + taken;
3173 struct iovec *cur;
3174 size_t full_size;
3175 size_t next_command_ofs;
3176 uint16_t body_size;
3177 struct iovec *iov_tmp;
3178
3179 if (verified_buflen > taken) {
3180 len = verified_buflen - taken;
3181 } else {
3182 tf = NULL;
3183 tf_len = 0;
3184 }
3185
3186 if (len < 4) {
3187 DEBUG(10, ("%d bytes left, expected at least %d\n",
3188 (int)len, 4));
3189 goto inval;
3190 }
3191 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3192 struct smbXcli_session *s;
3193 uint64_t uid;
3194 struct iovec tf_iov[2];
3195 size_t enc_len;
3196 NTSTATUS status;
3197
3198 if (len < SMB2_TF_HDR_SIZE) {
3199 DEBUG(10, ("%d bytes left, expected at least %d\n",
3200 (int)len, SMB2_TF_HDR_SIZE));
3201 goto inval;
3202 }
3203 tf = hdr;
3204 tf_len = SMB2_TF_HDR_SIZE;
3205 taken += tf_len;
3206
3207 hdr = first_hdr + taken;
3208 enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3209 uid = BVAL(tf, SMB2_TF_SESSION_ID);
3210
3211 if (len < SMB2_TF_HDR_SIZE + enc_len) {
3212 DEBUG(10, ("%d bytes left, expected at least %d\n",
3213 (int)len,
3214 (int)(SMB2_TF_HDR_SIZE + enc_len)));
3215 goto inval;
3216 }
3217
3218 s = conn->sessions;
3219 for (; s; s = s->next) {
3220 if (s->smb2->session_id != uid) {
3221 continue;
3222 }
3223 break;
3224 }
3225
3226 if (s == NULL) {
3227 DEBUG(10, ("unknown session_id %llu\n",
3228 (unsigned long long)uid));
3229 goto inval;
3230 }
3231
3232 tf_iov[0].iov_base = (void *)tf;
3233 tf_iov[0].iov_len = tf_len;
3234 tf_iov[1].iov_base = (void *)hdr;
3235 tf_iov[1].iov_len = enc_len;
3236
3237 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3238 conn->smb2.server.cipher,
3239 tf_iov, 2);
3240 if (!NT_STATUS_IS_OK(status)) {
3241 TALLOC_FREE(iov);
3242 return status;
3243 }
3244
3245 verified_buflen = taken + enc_len;
3246 len = enc_len;
3247 }
3248
3249 /*
3250 * We need the header plus the body length field
3251 */
3252
3253 if (len < SMB2_HDR_BODY + 2) {
3254 DEBUG(10, ("%d bytes left, expected at least %d\n",
3255 (int)len, SMB2_HDR_BODY));
3256 goto inval;
3257 }
3258 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3259 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3260 IVAL(hdr, 0)));
3261 goto inval;
3262 }
3263 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3264 DEBUG(10, ("Got HDR len %d, expected %d\n",
3265 SVAL(hdr, 4), SMB2_HDR_BODY));
3266 goto inval;
3267 }
3268
3269 full_size = len;
3270 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3271 body_size = SVAL(hdr, SMB2_HDR_BODY);
3272
3273 if (next_command_ofs != 0) {
3274 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3275 goto inval;
3276 }
3277 if (next_command_ofs > full_size) {
3278 goto inval;
3279 }
3280 full_size = next_command_ofs;
3281 }
3282 if (body_size < 2) {
3283 goto inval;
3284 }
3285 body_size &= 0xfffe;
3286
3287 if (body_size > (full_size - SMB2_HDR_BODY)) {
3288 goto inval;
3289 }
3290
3291 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3292 num_iov + 4);
3293 if (iov_tmp == NULL) {
3294 TALLOC_FREE(iov);
3295 return NT_STATUS_NO_MEMORY;
3296 }
3297 iov = iov_tmp;
3298 cur = &iov[num_iov];
3299 num_iov += 4;
3300
3301 cur[0].iov_base = tf;
3302 cur[0].iov_len = tf_len;
3303 cur[1].iov_base = hdr;
3304 cur[1].iov_len = SMB2_HDR_BODY;
3305 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3306 cur[2].iov_len = body_size;
3307 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3308 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3309
3310 taken += full_size;
3311 }
3312
3313 *piov = iov;
3314 *pnum_iov = num_iov;
3315 return NT_STATUS_OK;
3316
3317 inval:
3318 TALLOC_FREE(iov);
3319 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3320 }
3321
3322 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3323 uint64_t mid)
3324 {
3325 size_t num_pending = talloc_array_length(conn->pending);
3326 size_t i;
3327
3328 for (i=0; i<num_pending; i++) {
3329 struct tevent_req *req = conn->pending[i];
3330 struct smbXcli_req_state *state =
3331 tevent_req_data(req,
3332 struct smbXcli_req_state);
3333
3334 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3335 return req;
3336 }
3337 }
3338 return NULL;
3339 }
3340
3341 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3342 TALLOC_CTX *tmp_mem,
3343 uint8_t *inbuf)
3344 {
3345 struct tevent_req *req;
3346 struct smbXcli_req_state *state = NULL;
3347 struct iovec *iov;
3348 int i, num_iov;
3349 NTSTATUS status;
3350 bool defer = true;
3351 struct smbXcli_session *last_session = NULL;
3352 size_t inbuf_len = smb_len_tcp(inbuf);
3353
3354 status = smb2cli_inbuf_parse_compound(conn,
3355 inbuf + NBT_HDR_SIZE,
3356 inbuf_len,
3357 tmp_mem,
3358 &iov, &num_iov);
3359 if (!NT_STATUS_IS_OK(status)) {
3360 return status;
3361 }
3362
3363 for (i=0; i<num_iov; i+=4) {
3364 uint8_t *inbuf_ref = NULL;
3365 struct iovec *cur = &iov[i];
3366 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3367 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3368 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3369 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3370 uint16_t req_opcode;
3371 uint32_t req_flags;
3372 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3373 uint32_t new_credits;
3374 struct smbXcli_session *session = NULL;
3375 const DATA_BLOB *signing_key = NULL;
3376 bool was_encrypted = false;
3377
3378 new_credits = conn->smb2.cur_credits;
3379 new_credits += credits;
3380 if (new_credits > UINT16_MAX) {
3381 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3382 }
3383 conn->smb2.cur_credits += credits;
3384
3385 req = smb2cli_conn_find_pending(conn, mid);
3386 if (req == NULL) {
3387 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3388 }
3389 state = tevent_req_data(req, struct smbXcli_req_state);
3390
3391 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3392 if (opcode != req_opcode) {
3393 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3394 }
3395 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3396
3397 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3398 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3399 }
3400
3401 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3402 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3403 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3404 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3405
3406 if (state->smb2.got_async) {
3407 /* We only expect one STATUS_PENDING response */
3408 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3409 }
3410 state->smb2.got_async = true;
3411
3412 /*
3413 * async interim responses are not signed,
3414 * even if the SMB2_HDR_FLAG_SIGNED flag
3415 * is set.
3416 */
3417 req_flags |= SMB2_HDR_FLAG_ASYNC;
3418 SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
3419 SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
3420
3421 if (state->smb2.notify_async) {
3422 tevent_req_defer_callback(req, state->ev);
3423 tevent_req_notify_callback(req);
3424 }
3425 continue;
3426 }
3427
3428 session = state->session;
3429 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3430 session = last_session;
3431 }
3432 last_session = session;
3433
3434 if (state->smb2.should_sign) {
3435 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3436 return NT_STATUS_ACCESS_DENIED;
3437 }
3438 }
3439
3440 if (flags & SMB2_HDR_FLAG_SIGNED) {
3441 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3442
3443 if (session == NULL) {
3444 struct smbXcli_session *s;
3445
3446 s = state->conn->sessions;
3447 for (; s; s = s->next) {
3448 if (s->smb2->session_id != uid) {
3449 continue;
3450 }
3451
3452 session = s;
3453 break;
3454 }
3455 }
3456
3457 if (session == NULL) {
3458 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3459 }
3460
3461 last_session = session;
3462 signing_key = &session->smb2_channel.signing_key;
3463 }
3464
3465 if (opcode == SMB2_OP_SESSSETUP) {
3466 /*
3467 * We prefer the channel signing key, if it is
3468 * already there.
3469 *
3470 * If we do not have a channel signing key yet,
3471 * we try the main signing key, if it is not
3472 * the final response.
3473 */
3474 if (signing_key && signing_key->length == 0 &&
3475 !NT_STATUS_IS_OK(status)) {
3476 signing_key = &session->smb2->signing_key;
3477 }
3478
3479 if (signing_key && signing_key->length == 0) {
3480 /*
3481 * If we do not have a session key to
3482 * verify the signature, we defer the
3483 * signing check to the caller.
3484 *
3485 * The caller gets NT_STATUS_OK, it
3486 * has to call
3487 * smb2cli_session_set_session_key()
3488 * or
3489 * smb2cli_session_set_channel_key()
3490 * which will check the signature
3491 * with the channel signing key.
3492 */
3493 signing_key = NULL;
3494 }
3495 }
3496
3497 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3498 const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3499 uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3500
3501 /*
3502 * If the response was encrypted in a SMB2_TRANSFORM
3503 * pdu, which belongs to the correct session,
3504 * we do not need to do signing checks
3505 *
3506 * It could be the session the response belongs to
3507 * or the session that was used to encrypt the
3508 * SMB2_TRANSFORM request.
3509 */
3510 if ((session && session->smb2->session_id == uid) ||
3511 (state->smb2.encryption_session_id == uid)) {
3512 signing_key = NULL;
3513 was_encrypted = true;
3514 }
3515 }
3516
3517 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3518 /*
3519 * if the server returns NT_STATUS_USER_SESSION_DELETED
3520 * the response is not signed and we should
3521 * propagate the NT_STATUS_USER_SESSION_DELETED
3522 * status to the caller.
3523 */
3524 state->smb2.signing_skipped = true;
3525 signing_key = NULL;
3526 }
3527
3528 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3529 /*
3530 * if the server returns
3531 * NT_STATUS_INVALID_PARAMETER
3532 * the response might not be encrypted.
3533 */
3534 if (state->smb2.should_encrypt && !was_encrypted) {
3535 state->smb2.signing_skipped = true;
3536 signing_key = NULL;
3537 }
3538 }
3539
3540 if (state->smb2.should_encrypt && !was_encrypted) {
3541 if (!state->smb2.signing_skipped) {
3542 return NT_STATUS_ACCESS_DENIED;
3543 }
3544 }
3545
3546 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3547 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3548 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3549 /*
3550 * if the server returns
3551 * NT_STATUS_NETWORK_NAME_DELETED
3552 * NT_STATUS_FILE_CLOSED
3553 * NT_STATUS_INVALID_PARAMETER
3554 * the response might not be signed
3555 * as this happens before the signing checks.
3556 *
3557 * If server echos the signature (or all zeros)
3558 * we should report the status from the server
3559 * to the caller.
3560 */
3561 if (signing_key) {
3562 int cmp;
3563
3564 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3565 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3566 16);
3567 if (cmp == 0) {
3568 state->smb2.signing_skipped = true;
3569 signing_key = NULL;
3570 }
3571 }
3572 if (signing_key) {
3573 int cmp;
3574 static const uint8_t zeros[16];
3575
3576 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3577 zeros,
3578 16);
3579 if (cmp == 0) {
3580 state->smb2.signing_skipped = true;
3581 signing_key = NULL;
3582 }
3583 }
3584 }
3585
3586 if (signing_key) {
3587 status = smb2_signing_check_pdu(*signing_key,
3588 state->conn->protocol,
3589 &cur[1], 3);
3590 if (!NT_STATUS_IS_OK(status)) {
3591 /*
3592 * If the signing check fails, we disconnect
3593 * the connection.
3594 */
3595 return status;
3596 }
3597 }
3598
3599 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
3600 (session != NULL) && session->disconnect_expired)
3601 {
3602 /*
3603 * this should be a short term hack
3604 * until the upper layers have implemented
3605 * re-authentication.
3606 */
3607 return status;
3608 }
3609
3610 smbXcli_req_unset_pending(req);
3611
3612 /*
3613 * There might be more than one response
3614 * we need to defer the notifications
3615 */
3616 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3617 defer = false;
3618 }
3619
3620 if (defer) {
3621 tevent_req_defer_callback(req, state->ev);
3622 }
3623
3624 /*
3625 * Note: here we use talloc_reference() in a way
3626 * that does not expose it to the caller.
3627 */
3628 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3629 if (tevent_req_nomem(inbuf_ref, req)) {
3630 continue;
3631 }
3632
3633 /* copy the related buffers */
3634 state->smb2.recv_iov[0] = cur[1];
3635 state->smb2.recv_iov[1] = cur[2];
3636 state->smb2.recv_iov[2] = cur[3];
3637
3638 tevent_req_done(req);
3639 }
3640
3641 if (defer) {
3642 return NT_STATUS_RETRY;
3643 }
3644
3645 return NT_STATUS_OK;
3646 }
3647
3648 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3649 struct iovec **piov,
3650 const struct smb2cli_req_expected_response *expected,
3651 size_t num_expected)
3652 {
3653 struct smbXcli_req_state *state =
3654 tevent_req_data(req,
3655 struct smbXcli_req_state);
3656 NTSTATUS status;
3657 size_t body_size;
3658 bool found_status = false;
3659 bool found_size = false;
3660 size_t i;
3661
3662 if (piov != NULL) {
3663 *piov = NULL;
3664 }
3665
3666 if (tevent_req_is_in_progress(req) && state->smb2.got_async) {
3667 return STATUS_PENDING;
3668 }
3669
3670 if (tevent_req_is_nterror(req, &status)) {
3671 for (i=0; i < num_expected; i++) {
3672 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3673 found_status = true;
3674 break;
3675 }
3676 }
3677
3678 if (found_status) {
3679 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3680 }
3681
3682 return status;
3683 }
3684
3685 if (num_expected == 0) {
3686 found_status = true;
3687 found_size = true;
3688 }
3689
3690 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3691 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3692
3693 for (i=0; i < num_expected; i++) {
3694 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3695 continue;
3696 }
3697
3698 found_status = true;
3699 if (expected[i].body_size == 0) {
3700 found_size = true;
3701 break;
3702 }
3703
3704 if (expected[i].body_size == body_size) {
3705 found_size = true;
3706 break;
3707 }
3708 }
3709
3710 if (!found_status) {
3711 return status;
3712 }
3713
3714 if (state->smb2.signing_skipped) {
3715 if (num_expected > 0) {
3716 return NT_STATUS_ACCESS_DENIED;
3717 }
3718 if (!NT_STATUS_IS_ERR(status)) {
3719 return NT_STATUS_ACCESS_DENIED;
3720 }
3721 }
3722
3723 if (!found_size) {
3724 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3725 }
3726
3727 if (piov != NULL) {
3728 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3729 }
3730
3731 return status;
3732 }
3733
3734 NTSTATUS smb2cli_req_get_sent_iov(struct tevent_req *req,
3735 struct iovec *sent_iov)
3736 {
3737 struct smbXcli_req_state *state =
3738 tevent_req_data(req,
3739 struct smbXcli_req_state);
3740
3741 if (tevent_req_is_in_progress(req)) {
3742 return STATUS_PENDING;
3743 }
3744
3745 sent_iov[0].iov_base = state->smb2.hdr;
3746 sent_iov[0].iov_len = sizeof(state->smb2.hdr);
3747
3748 sent_iov[1].iov_base = discard_const(state->smb2.fixed);
3749 sent_iov[1].iov_len = state->smb2.fixed_len;
3750
3751 if (state->smb2.dyn != NULL) {
3752 sent_iov[2].iov_base = discard_const(state->smb2.dyn);
3753 sent_iov[2].iov_len = state->smb2.dyn_len;
3754 } else {
3755 sent_iov[2].iov_base = NULL;
3756 sent_iov[2].iov_len = 0;
3757 }
3758
3759 return NT_STATUS_OK;
3760 }
3761
3762 static const struct {
3763 enum protocol_types proto;
3764 const char *smb1_name;
3765 } smb1cli_prots[] = {
3766 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
3767 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
3768 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
3769 {PROTOCOL_LANMAN1, "LANMAN1.0"},
3770 {PROTOCOL_LANMAN2, "LM1.2X002"},
3771 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
3772 {PROTOCOL_LANMAN2, "LANMAN2.1"},
3773 {PROTOCOL_LANMAN2, "Samba"},
3774 {PROTOCOL_NT1, "NT LANMAN 1.0"},
3775 {PROTOCOL_NT1, "NT LM 0.12"},
3776 {PROTOCOL_SMB2_02, "SMB 2.002"},
3777 {PROTOCOL_SMB2_10, "SMB 2.???"},
3778 };
3779
3780 static const struct {
3781 enum protocol_types proto;
3782 uint16_t smb2_dialect;
3783 } smb2cli_prots[] = {
3784 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
3785 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
3786 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
3787 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
3788 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
3789 {PROTOCOL_SMB3_02, SMB3_DIALECT_REVISION_302},
3790 {PROTOCOL_SMB3_10, SMB3_DIALECT_REVISION_310},
3791 };
3792
3793 struct smbXcli_negprot_state {
3794 struct smbXcli_conn *conn;
3795 struct tevent_context *ev;
3796 uint32_t timeout_msec;
3797
3798 struct {
3799 uint8_t fixed[36];
3800 } smb2;
3801 };
3802
3803 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3804 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3805 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3806 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3807 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3808 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3809 TALLOC_CTX *frame,
3810 uint8_t *inbuf);
3811
3812 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3813 struct tevent_context *ev,
3814 struct smbXcli_conn *conn,
3815 uint32_t timeout_msec,
3816 enum protocol_types min_protocol,
3817 enum protocol_types max_protocol)
3818 {
3819 struct tevent_req *req, *subreq;
3820 struct smbXcli_negprot_state *state;
3821
3822 req = tevent_req_create(mem_ctx, &state,
3823 struct smbXcli_negprot_state);
3824 if (req == NULL) {
3825 return NULL;
3826 }
3827 state->conn = conn;
3828 state->ev = ev;
3829 state->timeout_msec = timeout_msec;
3830
3831 if (min_protocol == PROTOCOL_NONE) {
3832 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3833 return tevent_req_post(req, ev);
3834 }
3835
3836 if (max_protocol == PROTOCOL_NONE) {
3837 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3838 return tevent_req_post(req, ev);
3839 }
3840
3841 if (min_protocol > max_protocol) {
3842 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3843 return tevent_req_post(req, ev);
3844 }
3845
3846 conn->min_protocol = min_protocol;
3847 conn->max_protocol = max_protocol;
3848 conn->protocol = PROTOCOL_NONE;
3849
3850 if ((min_protocol < PROTOCOL_SMB2_02) &&
3851 (max_protocol < PROTOCOL_SMB2_02)) {
3852 /*
3853 * SMB1 only...
3854 */
3855 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3856
3857 subreq = smbXcli_negprot_smb1_subreq(state);
3858 if (tevent_req_nomem(subreq, req)) {
3859 return tevent_req_post(req, ev);
3860 }
3861 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3862 return req;
3863 }
3864
3865 if ((min_protocol >= PROTOCOL_SMB2_02) &&
3866 (max_protocol >= PROTOCOL_SMB2_02)) {
3867 /*
3868 * SMB2 only...
3869 */
3870 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3871
3872 /*
3873 * As we're starting with an SMB2 negprot, emulate Windows
3874 * and ask for 31 credits in the initial SMB2 negprot.
3875 * If we don't and leave requested credits at
3876 * zero, MacOSX servers return zero credits on
3877 * the negprot reply and we fail to connect.
3878 */
3879 smb2cli_conn_set_max_credits(conn,
3880 WINDOWS_CLIENT_PURE_SMB2_NEGPROT_INITIAL_CREDIT_ASK);
3881
3882 subreq = smbXcli_negprot_smb2_subreq(state);
3883 if (tevent_req_nomem(subreq, req)) {
3884 return tevent_req_post(req, ev);
3885 }
3886 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3887 return req;
3888 }
3889
3890 /*
3891 * We send an SMB1 negprot with the SMB2 dialects
3892 * and expect a SMB1 or a SMB2 response.
3893 *
3894 * smbXcli_negprot_dispatch_incoming() will fix the
3895 * callback to match protocol of the response.
3896 */
3897 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
3898
3899 subreq = smbXcli_negprot_smb1_subreq(state);
3900 if (tevent_req_nomem(subreq, req)) {
3901 return tevent_req_post(req, ev);
3902 }
3903 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
3904 return req;
3905 }
3906
3907 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
3908 {
3909 struct tevent_req *req =
3910 tevent_req_callback_data(subreq,
3911 struct tevent_req);
3912 NTSTATUS status;
3913
3914 /*
3915 * we just want the low level error
3916 */
3917 status = tevent_req_simple_recv_ntstatus(subreq);
3918 TALLOC_FREE(subreq);
3919 if (tevent_req_nterror(req, status)) {
3920 return;
3921 }
3922
3923 /* this should never happen */
3924 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
3925 }
3926
3927 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
3928 {
3929 size_t i;
3930 DATA_BLOB bytes = data_blob_null;
3931 uint8_t flags;
3932 uint16_t flags2;
3933
3934 /* setup the protocol strings */
3935 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3936 uint8_t c = 2;
3937 bool ok;
3938
3939 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
3940 continue;
3941 }
3942
3943 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
3944 continue;
3945 }
3946
3947 ok = data_blob_append(state, &bytes, &c, sizeof(c));
3948 if (!ok) {
3949 return NULL;
3950 }
3951
3952 /*
3953 * We now it is already ascii and
3954 * we want NULL termination.
3955 */
3956 ok = data_blob_append(state, &bytes,
3957 smb1cli_prots[i].smb1_name,
3958 strlen(smb1cli_prots[i].smb1_name)+1);
3959 if (!ok) {
3960 return NULL;
3961 }
3962 }
3963
3964 smb1cli_req_flags(state->conn->max_protocol,
3965 state->conn->smb1.client.capabilities,
3966 SMBnegprot,
3967 0, 0, &flags,
3968 0, 0, &flags2);
3969
3970 return smb1cli_req_send(state, state->ev, state->conn,
3971 SMBnegprot,
3972 flags, ~flags,
3973 flags2, ~flags2,
3974 state->timeout_msec,
3975 0xFFFE, 0, NULL, /* pid, tid, session */
3976 0, NULL, /* wct, vwv */
3977 bytes.length, bytes.data);
3978 }
3979
3980 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
3981 {
3982 struct tevent_req *req =
3983 tevent_req_callback_data(subreq,
3984 struct tevent_req);
3985 struct smbXcli_negprot_state *state =
3986 tevent_req_data(req,
3987 struct smbXcli_negprot_state);
3988 struct smbXcli_conn *conn = state->conn;
3989 struct iovec *recv_iov = NULL;
3990 uint8_t *inhdr;
3991 uint8_t wct;
3992 uint16_t *vwv;
3993 uint32_t num_bytes;
3994 uint8_t *bytes;
3995 NTSTATUS status;
3996 uint16_t protnum;
3997 size_t i;
3998 size_t num_prots = 0;
3999 uint8_t flags;
4000 uint32_t client_capabilities = conn->smb1.client.capabilities;
4001 uint32_t both_capabilities;
4002 uint32_t server_capabilities = 0;
4003 uint32_t capabilities;
4004 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
4005 uint32_t server_max_xmit = 0;
4006 uint32_t max_xmit;
4007 uint32_t server_max_mux = 0;
4008 uint16_t server_security_mode = 0;
4009 uint32_t server_session_key = 0;
4010 bool server_readbraw = false;
4011 bool server_writebraw = false;
4012 bool server_lockread = false;
4013 bool server_writeunlock = false;
4014 struct GUID server_guid = GUID_zero();
4015 DATA_BLOB server_gss_blob = data_blob_null;
4016 uint8_t server_challenge[8];
4017 char *server_workgroup = NULL;
4018 char *server_name = NULL;
4019 int server_time_zone = 0;
4020 NTTIME server_system_time = 0;
4021 static const struct smb1cli_req_expected_response expected[] = {
4022 {
4023 .status = NT_STATUS_OK,
4024 .wct = 0x11, /* NT1 */
4025 },
4026 {
4027 .status = NT_STATUS_OK,
4028 .wct = 0x0D, /* LM */
4029 },
4030 {
4031 .status = NT_STATUS_OK,
4032 .wct = 0x01, /* CORE */
4033 }
4034 };
4035
4036 ZERO_STRUCT(server_challenge);
4037
4038 status = smb1cli_req_recv(subreq, state,
4039 &recv_iov,
4040 &inhdr,
4041 &wct,
4042 &vwv,
4043 NULL, /* pvwv_offset */
4044 &num_bytes,
4045 &bytes,
4046 NULL, /* pbytes_offset */
4047 NULL, /* pinbuf */
4048 expected, ARRAY_SIZE(expected));
4049 TALLOC_FREE(subreq);
4050 if (tevent_req_nterror(req, status)) {
4051 return;
4052 }
4053
4054 flags = CVAL(inhdr, HDR_FLG);
4055
4056 protnum = SVAL(vwv, 0);
4057
4058 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4059 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4060 continue;
4061 }
4062
4063 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4064 continue;
4065 }
4066
4067 if (protnum != num_prots) {
4068 num_prots++;
4069 continue;
4070 }
4071
4072 conn->protocol = smb1cli_prots[i].proto;
4073 break;
4074 }
4075
4076 if (conn->protocol == PROTOCOL_NONE) {
4077 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4078 return;
4079 }
4080
4081 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
4082 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
4083 "and the selected protocol level doesn't support it.\n"));
4084 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4085 return;
4086 }
4087
4088 if (flags & FLAG_SUPPORT_LOCKREAD) {
4089 server_lockread = true;
4090 server_writeunlock = true;
4091 }
4092
4093 if (conn->protocol >= PROTOCOL_NT1) {
4094 const char *client_signing = NULL;
4095 bool server_mandatory = false;
4096 bool server_allowed = false;
4097 const char *server_signing = NULL;
4098 bool ok;
4099 uint8_t key_len;
4100
4101 if (wct != 0x11) {
4102 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4103 return;
4104 }
4105
4106 /* NT protocol */
4107 server_security_mode = CVAL(vwv + 1, 0);
4108 server_max_mux = SVAL(vwv + 1, 1);
4109 server_max_xmit = IVAL(vwv + 3, 1);
4110 server_session_key = IVAL(vwv + 7, 1);
4111 server_time_zone = SVALS(vwv + 15, 1);
4112 server_time_zone *= 60;
4113 /* this time arrives in real GMT */
4114 server_system_time = BVAL(vwv + 11, 1);
4115 server_capabilities = IVAL(vwv + 9, 1);
4116
4117 key_len = CVAL(vwv + 16, 1);
4118
4119 if (server_capabilities & CAP_RAW_MODE) {
4120 server_readbraw = true;
4121 server_writebraw = true;
4122 }
4123 if (server_capabilities & CAP_LOCK_AND_READ) {
4124 server_lockread = true;
4125 }
4126
4127 if (server_capabilities & CAP_EXTENDED_SECURITY) {
4128 DATA_BLOB blob1, blob2;
4129
4130 if (num_bytes < 16) {
4131 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4132 return;
4133 }
4134
4135 blob1 = data_blob_const(bytes, 16);
4136 status = GUID_from_data_blob(&blob1, &server_guid);
4137 if (tevent_req_nterror(req, status)) {
4138 return;
4139 }
4140
4141 blob1 = data_blob_const(bytes+16, num_bytes-16);
4142 blob2 = data_blob_dup_talloc(state, blob1);
4143 if (blob1.length > 0 &&
4144 tevent_req_nomem(blob2.data, req)) {
4145 return;
4146 }
4147 server_gss_blob = blob2;
4148 } else {
4149 DATA_BLOB blob1, blob2;
4150
4151 if (num_bytes < key_len) {
4152 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4153 return;
4154 }
4155
4156 if (key_len != 0 && key_len != 8) {
4157 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4158 return;
4159 }
4160
4161 if (key_len == 8) {
4162 memcpy(server_challenge, bytes, 8);
4163 }
4164
4165 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4166 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
4167 if (blob1.length > 0) {
4168 size_t len;
4169
4170 len = utf16_len_n(blob1.data,
4171 blob1.length);
4172 blob1.length = len;
4173
4174 ok = convert_string_talloc(state,
4175 CH_UTF16LE,
4176 CH_UNIX,
4177 blob1.data,
4178 blob1.length,
4179 &server_workgroup,
4180 &len);
4181 if (!ok) {
4182 status = map_nt_error_from_unix_common(errno);
4183 tevent_req_nterror(req, status);
4184 return;
4185 }
4186 }
4187
4188 blob2.data += blob1.length;
4189 blob2.length -= blob1.length;
4190 if (blob2.length > 0) {
4191 size_t len;
4192
4193 len = utf16_len_n(blob1.data,
4194 blob1.length);
4195 blob1.length = len;
4196
4197 ok = convert_string_talloc(state,
4198 CH_UTF16LE,
4199 CH_UNIX,
4200 blob2.data,
4201 blob2.length,
4202 &server_name,
4203 &len);
4204 if (!ok) {
4205 status = map_nt_error_from_unix_common(errno);
4206 tevent_req_nterror(req, status);
4207 return;
4208 }
4209 }
4210 }
4211
4212 client_signing = "disabled";
4213 if (conn->allow_signing) {
4214 client_signing = "allowed";
4215 }
4216 if (conn->mandatory_signing) {
4217 client_signing = "required";
4218 }
4219
4220 server_signing = "not supported";
4221 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4222 server_signing = "supported";
4223 server_allowed = true;
4224 } else if (conn->mandatory_signing) {
4225 /*
4226 * We have mandatory signing as client
4227 * lets assume the server will look at our
4228 * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4229 * flag in the session setup
4230 */
4231 server_signing = "not announced";
4232 server_allowed = true;
4233 }
4234 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4235 server_signing = "required";
4236 server_mandatory = true;
4237 }
4238
4239 ok = smb_signing_set_negotiated(conn->smb1.signing,
4240 server_allowed,
4241 server_mandatory);
4242 if (!ok) {
4243 DEBUG(1,("cli_negprot: SMB signing is required, "
4244 "but client[%s] and server[%s] mismatch\n",
4245 client_signing, server_signing));
4246 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4247 return;
4248 }
4249
4250 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4251 DATA_BLOB blob1;
4252 uint8_t key_len;
4253 time_t t;
4254
4255 if (wct != 0x0D) {
4256 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4257 return;
4258 }
4259
4260 server_security_mode = SVAL(vwv + 1, 0);
4261 server_max_xmit = SVAL(vwv + 2, 0);
4262 server_max_mux = SVAL(vwv + 3, 0);
4263 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4264 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4265 server_session_key = IVAL(vwv + 6, 0);
4266 server_time_zone = SVALS(vwv + 10, 0);
4267 server_time_zone *= 60;
4268 /* this time is converted to GMT by make_unix_date */
4269 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4270 unix_to_nt_time(&server_system_time, t);
4271 key_len = SVAL(vwv + 11, 0);
4272
4273 if (num_bytes < key_len) {
4274 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4275 return;
4276 }
4277
4278 if (key_len != 0 && key_len != 8) {
4279 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4280 return;
4281 }
4282
4283 if (key_len == 8) {
4284 memcpy(server_challenge, bytes, 8);
4285 }
4286
4287 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4288 if (blob1.length > 0) {
4289 size_t len;
4290 bool ok;
4291
4292 len = utf16_len_n(blob1.data,
4293 blob1.length);
4294 blob1.length = len;
4295
4296 ok = convert_string_talloc(state,
4297 CH_DOS,
4298 CH_UNIX,
4299 blob1.data,
4300 blob1.length,
4301 &server_workgroup,
4302 &len);
4303 if (!ok) {
4304 status = map_nt_error_from_unix_common(errno);
4305 tevent_req_nterror(req, status);
4306 return;
4307 }
4308 }
4309
4310 } else {
4311 /* the old core protocol */
4312 server_time_zone = get_time_zone(time(NULL));
4313 server_max_xmit = 1024;
4314 server_max_mux = 1;
4315 }
4316
4317 if (server_max_xmit < 1024) {
4318 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4319 return;
4320 }
4321
4322 if (server_max_mux < 1) {
4323 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4324 return;
4325 }
4326
4327 /*
4328 * Now calculate the negotiated capabilities
4329 * based on the mask for:
4330 * - client only flags
4331 * - flags used in both directions
4332 * - server only flags
4333 */
4334 both_capabilities = client_capabilities & server_capabilities;
4335 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4336 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4337 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4338
4339 max_xmit = MIN(client_max_xmit, server_max_xmit);
4340
4341 conn->smb1.server.capabilities = server_capabilities;
4342 conn->smb1.capabilities = capabilities;
4343
4344 conn->smb1.server.max_xmit = server_max_xmit;
4345 conn->smb1.max_xmit = max_xmit;
4346
4347 conn->smb1.server.max_mux = server_max_mux;
4348
4349 conn->smb1.server.security_mode = server_security_mode;
4350
4351 conn->smb1.server.readbraw = server_readbraw;
4352 conn->smb1.server.writebraw = server_writebraw;
4353 conn->smb1.server.lockread = server_lockread;
4354 conn->smb1.server.writeunlock = server_writeunlock;
4355
4356 conn->smb1.server.session_key = server_session_key;
4357
4358 talloc_steal(conn, server_gss_blob.data);
4359 conn->smb1.server.gss_blob = server_gss_blob;
4360 conn->smb1.server.guid = server_guid;
4361 memcpy(conn->smb1.server.challenge, server_challenge, 8);
4362 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4363 conn->smb1.server.name = talloc_move(conn, &server_name);
4364
4365 conn->smb1.server.time_zone = server_time_zone;
4366 conn->smb1.server.system_time = server_system_time;
4367
4368 tevent_req_done(req);
4369 }
4370
4371 static size_t smbXcli_padding_helper(uint32_t offset, size_t n)
4372 {
4373 if ((offset & (n-1)) == 0) return 0;
4374 return n - (offset & (n-1));
4375 }
4376
4377 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4378 {
4379 size_t i;
4380 uint8_t *buf;
4381 uint16_t dialect_count = 0;
4382 DATA_BLOB dyn = data_blob_null;
4383
4384 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4385 bool ok;
4386 uint8_t val[2];
4387
4388 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4389 continue;
4390 }
4391
4392 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4393 continue;
4394 }
4395
4396 SSVAL(val, 0, smb2cli_prots[i].smb2_dialect);
4397
4398 ok = data_blob_append(state, &dyn, val, sizeof(val));
4399 if (!ok) {
4400 return NULL;
4401 }
4402
4403 dialect_count++;
4404 }
4405
4406 buf = state->smb2.fixed;
4407 SSVAL(buf, 0, 36);
4408 SSVAL(buf, 2, dialect_count);
4409 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4410 SSVAL(buf, 6, 0); /* Reserved */
4411 if (state->conn->max_protocol >= PROTOCOL_SMB2_22) {
4412 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4413 } else {
4414 SIVAL(buf, 8, 0); /* Capabilities */
4415 }
4416 if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
4417 NTSTATUS status;
4418 DATA_BLOB blob;
4419
4420 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4421 state, &blob);
4422 if (!NT_STATUS_IS_OK(status)) {
4423 return NULL;
4424 }
4425 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4426 } else {
4427 memset(buf+12, 0, 16); /* ClientGuid */
4428 }
4429
4430 if (state->conn->max_protocol >= PROTOCOL_SMB3_10) {
4431 NTSTATUS status;
4432 struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4433 uint32_t offset;
4434 DATA_BLOB b;
4435 uint8_t p[38];
4436 const uint8_t zeros[8] = {0, };
4437 size_t pad;
4438 bool ok;
4439
4440 SSVAL(p, 0, 1); /* HashAlgorithmCount */
4441 SSVAL(p, 2, 32); /* SaltLength */
4442 SSVAL(p, 4, SMB2_PREAUTH_INTEGRITY_SHA512);
4443 generate_random_buffer(p + 6, 32);
4444
4445 b = data_blob_const(p, 38);
4446 status = smb2_negotiate_context_add(state, &c,
4447 SMB2_PREAUTH_INTEGRITY_CAPABILITIES, b);
4448 if (!NT_STATUS_IS_OK(status)) {
4449 return NULL;
4450 }
4451
4452 SSVAL(p, 0, 2); /* ChiperCount */
4453 SSVAL(p, 2, SMB2_ENCRYPTION_AES128_GCM);
4454 SSVAL(p, 4, SMB2_ENCRYPTION_AES128_CCM);
4455
4456 b = data_blob_const(p, 6);
4457 status = smb2_negotiate_context_add(state, &c,
4458 SMB2_ENCRYPTION_CAPABILITIES, b);
4459 if (!NT_STATUS_IS_OK(status)) {
4460 return NULL;
4461 }
4462
4463 status = smb2_negotiate_context_push(state, &b, c);
4464 if (!NT_STATUS_IS_OK(status)) {
4465 return NULL;
4466 }
4467
4468 offset = SMB2_HDR_BODY + sizeof(state->smb2.fixed) + dyn.length;
4469 pad = smbXcli_padding_helper(offset, 8);
4470
4471 ok = data_blob_append(state, &dyn, zeros, pad);
4472 if (!ok) {
4473 return NULL;
4474 }
4475 offset += pad;
4476
4477 ok = data_blob_append(state, &dyn, b.data, b.length);
4478 if (!ok) {
4479 return NULL;
4480 }
4481
4482 SIVAL(buf, 28, offset); /* NegotiateContextOffset */
4483 SSVAL(buf, 32, c.num_contexts); /* NegotiateContextCount */
4484 SSVAL(buf, 34, 0); /* Reserved */
4485 } else {
4486 SBVAL(buf, 28, 0); /* Reserved/ClientStartTime */
4487 }
4488
4489 return smb2cli_req_send(state, state->ev,
4490 state->conn, SMB2_OP_NEGPROT,
4491 0, 0, /* flags */
4492 state->timeout_msec,
4493 NULL, NULL, /* tcon, session */
4494 state->smb2.fixed, sizeof(state->smb2.fixed),
4495 dyn.data, dyn.length,
4496 UINT16_MAX); /* max_dyn_len */
4497 }
4498
4499 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4500 {
4501 struct tevent_req *req =
4502 tevent_req_callback_data(subreq,
4503 struct tevent_req);
4504 struct smbXcli_negprot_state *state =
4505 tevent_req_data(req,
4506 struct smbXcli_negprot_state);
4507 struct smbXcli_conn *conn = state->conn;
4508 size_t security_offset, security_length;
4509 DATA_BLOB blob;
4510 NTSTATUS status;
4511 struct iovec *iov;
4512 uint8_t *body;
4513 size_t i;
4514 uint16_t dialect_revision;
4515 struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4516 uint32_t negotiate_context_offset = 0;
4517 uint16_t negotiate_context_count = 0;
4518 DATA_BLOB negotiate_context_blob = data_blob_null;
4519 size_t avail;
4520 size_t ctx_ofs;
4521 size_t needed;
4522 struct smb2_negotiate_context *preauth = NULL;
4523 uint16_t hash_count;
4524 uint16_t salt_length;
4525 uint16_t hash_selected;
4526 struct hc_sha512state sctx;
4527 struct smb2_negotiate_context *cipher = NULL;
4528 struct iovec sent_iov[3];
4529 static const struct smb2cli_req_expected_response expected[] = {
4530 {
4531 .status = NT_STATUS_OK,
4532 .body_size = 0x41
4533 }
4534 };
4535
4536 status = smb2cli_req_recv(subreq, state, &iov,
4537 expected, ARRAY_SIZE(expected));
4538 if (tevent_req_nterror(req, status)) {
4539 return;
4540 }
4541
4542 body = (uint8_t *)iov[1].iov_base;
4543
4544 dialect_revision = SVAL(body, 4);
4545
4546 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4547 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4548 continue;
4549 }
4550
4551 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4552 continue;
4553 }
4554
4555 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4556 continue;
4557 }
4558
4559 conn->protocol = smb2cli_prots[i].proto;
4560 break;
4561 }
4562
4563 if (conn->protocol == PROTOCOL_NONE) {
4564 TALLOC_FREE(subreq);
4565
4566 if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
4567 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4568 return;
4569 }
4570
4571 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4572 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4573 return;
4574 }
4575
4576 /* make sure we do not loop forever */
4577 state->conn->min_protocol = PROTOCOL_SMB2_02;
4578
4579 /*
4580 * send a SMB2 negprot, in order to negotiate
4581 * the SMB2 dialect.
4582 */
4583 subreq = smbXcli_negprot_smb2_subreq(state);
4584 if (tevent_req_nomem(subreq, req)) {
4585 return;
4586 }
4587 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4588 return;
4589 }
4590
4591 conn->smb2.server.security_mode = SVAL(body, 2);
4592 if (conn->protocol >= PROTOCOL_SMB3_10) {
4593 negotiate_context_count = SVAL(body, 6);
4594 }
4595
4596 blob = data_blob_const(body + 8, 16);
4597 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4598 if (tevent_req_nterror(req, status)) {
4599 return;
4600 }
4601
4602 conn->smb2.server.capabilities = IVAL(body, 24);
4603 conn->smb2.server.max_trans_size= IVAL(body, 28);
4604 conn->smb2.server.max_read_size = IVAL(body, 32);
4605 conn->smb2.server.max_write_size= IVAL(body, 36);
4606 conn->smb2.server.system_time = BVAL(body, 40);
4607 conn->smb2.server.start_time = BVAL(body, 48);
4608
4609 security_offset = SVAL(body, 56);
4610 security_length = SVAL(body, 58);
4611
4612 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4613 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4614 return;
4615 }
4616
4617 if (security_length > iov[2].iov_len) {
4618 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4619 return;
4620 }
4621
4622 conn->smb2.server.gss_blob = data_blob_talloc(conn,
4623 iov[2].iov_base,
4624 security_length);
4625 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4626 return;
4627 }
4628
4629 if (conn->protocol < PROTOCOL_SMB3_10) {
4630 TALLOC_FREE(subreq);
4631
4632 if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
4633 conn->smb2.server.cipher = SMB2_ENCRYPTION_AES128_CCM;
4634 }
4635 tevent_req_done(req);
4636 return;
4637 }
4638
4639 if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
4640 tevent_req_nterror(req,
4641 NT_STATUS_INVALID_NETWORK_RESPONSE);
4642 return;
4643 }
4644
4645 negotiate_context_offset = IVAL(body, 60);
4646 if (negotiate_context_offset < security_offset) {
4647 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4648 return;
4649 }
4650
4651 ctx_ofs = negotiate_context_offset - security_offset;
4652 if (ctx_ofs > iov[2].iov_len) {
4653 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4654 return;
4655 }
4656 avail = iov[2].iov_len - security_length;
4657 needed = iov[2].iov_len - ctx_ofs;
4658 if (needed > avail) {
4659 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4660 return;
4661 }
4662
4663 negotiate_context_blob.data = (uint8_t *)iov[2].iov_base;
4664 negotiate_context_blob.length = iov[2].iov_len;
4665
4666 negotiate_context_blob.data += ctx_ofs;
4667 negotiate_context_blob.length -= ctx_ofs;
4668
4669 status = smb2_negotiate_context_parse(state, negotiate_context_blob, &c);
4670 if (tevent_req_nterror(req, status)) {
4671 return;
4672 }
4673
4674 if (negotiate_context_count != c.num_contexts) {
4675 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4676 return;
4677 }
4678
4679 preauth = smb2_negotiate_context_find(&c,
4680 SMB2_PREAUTH_INTEGRITY_CAPABILITIES);
4681 if (preauth == NULL) {
4682 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4683 return;
4684 }
4685
4686 if (preauth->data.length < 6) {
4687 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4688 return;
4689 }
4690
4691 hash_count = SVAL(preauth->data.data, 0);
4692 salt_length = SVAL(preauth->data.data, 2);
4693 hash_selected = SVAL(preauth->data.data, 4);
4694
4695 if (hash_count != 1) {
4696 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4697 return;
4698 }
4699
4700 if (preauth->data.length != (6 + salt_length)) {
4701 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4702 return;
4703 }
4704
4705 if (hash_selected != SMB2_PREAUTH_INTEGRITY_SHA512) {
4706 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4707 return;
4708 }
4709
4710 cipher = smb2_negotiate_context_find(&c, SMB2_ENCRYPTION_CAPABILITIES);
4711 if (cipher != NULL) {
4712 uint16_t cipher_count;
4713
4714 if (cipher->data.length < 2) {
4715 tevent_req_nterror(req,
4716 NT_STATUS_INVALID_NETWORK_RESPONSE);
4717 return;
4718 }
4719
4720 cipher_count = SVAL(cipher->data.data, 0);
4721
4722 if (cipher_count > 1) {
4723 tevent_req_nterror(req,
4724 NT_STATUS_INVALID_NETWORK_RESPONSE);
4725 return;
4726 }
4727
4728 if (cipher->data.length != (2 + 2 * cipher_count)) {
4729 tevent_req_nterror(req,
4730 NT_STATUS_INVALID_NETWORK_RESPONSE);
4731 return;
4732 }
4733
4734 if (cipher_count == 1) {
4735 uint16_t cipher_selected;
4736
4737 cipher_selected = SVAL(cipher->data.data, 2);
4738
4739 switch (cipher_selected) {
4740 case SMB2_ENCRYPTION_AES128_GCM:
4741 case SMB2_ENCRYPTION_AES128_CCM:
4742 conn->smb2.server.cipher = cipher_selected;
4743 break;
4744 }
4745 }
4746 }
4747
4748 /* First we hash the request */
4749 smb2cli_req_get_sent_iov(subreq, sent_iov);
4750 samba_SHA512_Init(&sctx);
4751 samba_SHA512_Update(&sctx, conn->smb2.preauth_sha512,
4752 sizeof(conn->smb2.preauth_sha512));
4753 for (i = 0; i < 3; i++) {
4754 samba_SHA512_Update(&sctx, sent_iov[i].iov_base, sent_iov[i].iov_len);
4755 }
4756 samba_SHA512_Final(conn->smb2.preauth_sha512, &sctx);
4757 TALLOC_FREE(subreq);
4758
4759 /* And now we hash the response */
4760 samba_SHA512_Init(&sctx);
4761 samba_SHA512_Update(&sctx, conn->smb2.preauth_sha512,
4762 sizeof(conn->smb2.preauth_sha512));
4763 for (i = 0; i < 3; i++) {
4764 samba_SHA512_Update(&sctx, iov[i].iov_base, iov[i].iov_len);
4765 }
4766 samba_SHA512_Final(conn->smb2.preauth_sha512, &sctx);
4767
4768 tevent_req_done(req);
4769 }
4770
4771 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4772 TALLOC_CTX *tmp_mem,
4773 uint8_t *inbuf)
4774 {
4775 size_t num_pending = talloc_array_length(conn->pending);
4776 struct tevent_req *subreq;
4777 struct smbXcli_req_state *substate;
4778 struct tevent_req *req;
4779 uint32_t protocol_magic;
4780 size_t inbuf_len = smb_len_nbt(inbuf);
4781
4782 if (num_pending != 1) {
4783 return NT_STATUS_INTERNAL_ERROR;
4784 }
4785
4786 if (inbuf_len < 4) {
4787 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4788 }
4789
4790 subreq = conn->pending[0];
4791 substate = tevent_req_data(subreq, struct smbXcli_req_state);
4792 req = tevent_req_callback_data(subreq, struct tevent_req);
4793
4794 protocol_magic = IVAL(inbuf, 4);
4795
4796 switch (protocol_magic) {
4797 case SMB_MAGIC:
4798 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4799 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4800 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4801
4802 case SMB2_MAGIC:
4803 if (substate->smb2.recv_iov == NULL) {
4804 /*
4805 * For the SMB1 negprot we have move it.
4806 */
4807 substate->smb2.recv_iov = substate->smb1.recv_iov;
4808 substate->smb1.recv_iov = NULL;
4809 }
4810
4811 /*
4812 * we got an SMB2 answer, which consumed sequence number 0
4813 * so we need to use 1 as the next one.
4814 *
4815 * we also need to set the current credits to 0
4816 * as we consumed the initial one. The SMB2 answer
4817 * hopefully grant us a new credit.
4818 */
4819 conn->smb2.mid = 1;
4820 conn->smb2.cur_credits = 0;
4821 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4822 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4823 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4824 }
4825
4826 DEBUG(10, ("Got non-SMB PDU\n"));
4827 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4828 }
4829
4830 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
4831 {
4832 return tevent_req_simple_recv_ntstatus(req);
4833 }
4834
4835 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
4836 uint32_t timeout_msec,
4837 enum protocol_types min_protocol,
4838 enum protocol_types max_protocol)
4839 {
4840 TALLOC_CTX *frame = talloc_stackframe();
4841 struct tevent_context *ev;
4842 struct tevent_req *req;
4843 NTSTATUS status = NT_STATUS_NO_MEMORY;
4844 bool ok;
4845
4846 if (smbXcli_conn_has_async_calls(conn)) {
4847 /*
4848 * Can't use sync call while an async call is in flight
4849 */
4850 status = NT_STATUS_INVALID_PARAMETER_MIX;
4851 goto fail;
4852 }
4853 ev = samba_tevent_context_init(frame);
4854 if (ev == NULL) {
4855 goto fail;
4856 }
4857 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
4858 min_protocol, max_protocol);
4859 if (req == NULL) {
4860 goto fail;
4861 }
4862 ok = tevent_req_poll(req, ev);
4863 if (!ok) {
4864 status = map_nt_error_from_unix_common(errno);
4865 goto fail;
4866 }
4867 status = smbXcli_negprot_recv(req);
4868 fail:
4869 TALLOC_FREE(frame);
4870 return status;
4871 }
4872
4873 struct smb2cli_validate_negotiate_info_state {
4874 struct smbXcli_conn *conn;
4875 DATA_BLOB in_input_buffer;
4876 DATA_BLOB in_output_buffer;
4877 DATA_BLOB out_input_buffer;
4878 DATA_BLOB out_output_buffer;
4879 uint16_t dialect;
4880 };
4881
4882 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq);
4883
4884 struct tevent_req *smb2cli_validate_negotiate_info_send(TALLOC_CTX *mem_ctx,
4885 struct tevent_context *ev,
4886 struct smbXcli_conn *conn,
4887 uint32_t timeout_msec,
4888 struct smbXcli_session *session,
4889 struct smbXcli_tcon *tcon)
4890 {
4891 struct tevent_req *req;
4892 struct smb2cli_validate_negotiate_info_state *state;
4893 uint8_t *buf;
4894 uint16_t dialect_count = 0;
4895 struct tevent_req *subreq;
4896 bool _save_should_sign;
4897 size_t i;
4898
4899 req = tevent_req_create(mem_ctx, &state,
4900 struct smb2cli_validate_negotiate_info_state);
4901 if (req == NULL) {
4902 return NULL;
4903 }
4904 state->conn = conn;
4905
4906 state->in_input_buffer = data_blob_talloc_zero(state,
4907 4 + 16 + 1 + 1 + 2);
4908 if (tevent_req_nomem(state->in_input_buffer.data, req)) {
4909 return tevent_req_post(req, ev);
4910 }
4911 buf = state->in_input_buffer.data;
4912
4913 if (state->conn->max_protocol >= PROTOCOL_SMB2_22) {
4914 SIVAL(buf, 0, conn->smb2.client.capabilities);
4915 } else {
4916 SIVAL(buf, 0, 0); /* Capabilities */
4917 }
4918 if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
4919 NTSTATUS status;
4920 DATA_BLOB blob;
4921
4922 status = GUID_to_ndr_blob(&conn->smb2.client.guid,
4923 state, &blob);
4924 if (!NT_STATUS_IS_OK(status)) {
4925 return NULL;
4926 }
4927 memcpy(buf+4, blob.data, 16); /* ClientGuid */
4928 } else {
4929 memset(buf+4, 0, 16); /* ClientGuid */
4930 }
4931 if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
4932 SCVAL(buf, 20, conn->smb2.client.security_mode);
4933 } else {
4934 SCVAL(buf, 20, 0);
4935 }
4936 SCVAL(buf, 21, 0); /* reserved */
4937
4938 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4939 bool ok;
4940 size_t ofs;
4941
4942 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4943 continue;
4944 }
4945
4946 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4947 continue;
4948 }
4949
4950 if (smb2cli_prots[i].proto == state->conn->protocol) {
4951 state->dialect = smb2cli_prots[i].smb2_dialect;
4952 }
4953
4954 ofs = state->in_input_buffer.length;
4955 ok = data_blob_realloc(state, &state->in_input_buffer,
4956 ofs + 2);
4957 if (!ok) {
4958 tevent_req_oom(req);
4959 return tevent_req_post(req, ev);
4960 }
4961
4962 buf = state->in_input_buffer.data;
4963 SSVAL(buf, ofs, smb2cli_prots[i].smb2_dialect);
4964
4965 dialect_count++;
4966 }
4967 buf = state->in_input_buffer.data;
4968 SSVAL(buf, 22, dialect_count);
4969
4970 _save_should_sign = smb2cli_tcon_is_signing_on(tcon);
4971 smb2cli_tcon_should_sign(tcon, true);
4972 subreq = smb2cli_ioctl_send(state, ev, conn,
4973 timeout_msec, session, tcon,
4974 UINT64_MAX, /* in_fid_persistent */
4975 UINT64_MAX, /* in_fid_volatile */
4976 FSCTL_VALIDATE_NEGOTIATE_INFO,
4977 0, /* in_max_input_length */
4978 &state->in_input_buffer,
4979 24, /* in_max_output_length */
4980 &state->in_output_buffer,
4981 SMB2_IOCTL_FLAG_IS_FSCTL);
4982 smb2cli_tcon_should_sign(tcon, _save_should_sign);
4983 if (tevent_req_nomem(subreq, req)) {
4984 return tevent_req_post(req, ev);
4985 }
4986 tevent_req_set_callback(subreq,
4987 smb2cli_validate_negotiate_info_done,
4988 req);
4989
4990 return req;
4991 }
4992
4993 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq)
4994 {
4995 struct tevent_req *req =
4996 tevent_req_callback_data(subreq,
4997 struct tevent_req);
4998 struct smb2cli_validate_negotiate_info_state *state =
4999 tevent_req_data(req,
5000 struct smb2cli_validate_negotiate_info_state);
5001 NTSTATUS status;
5002 const uint8_t *buf;
5003 uint32_t capabilities;
5004 DATA_BLOB guid_blob;
5005 struct GUID server_guid;
5006 uint16_t security_mode;
5007 uint16_t dialect;
5008
5009 status = smb2cli_ioctl_recv(subreq, state,
5010 &state->out_input_buffer,
5011 &state->out_output_buffer);
5012 TALLOC_FREE(subreq);
5013 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED)) {
5014 /*
5015 * The response was signed, but not supported
5016 *
5017 * Older Windows and Samba releases return
5018 * NT_STATUS_FILE_CLOSED.
5019 */
5020 tevent_req_done(req);
5021 return;
5022 }
5023 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_DEVICE_REQUEST)) {
5024 /*
5025 * The response was signed, but not supported
5026 *
5027 * This is returned by the NTVFS based Samba 4.x file server
5028 * for file shares.
5029 */
5030 tevent_req_done(req);
5031 return;
5032 }
5033 if (NT_STATUS_EQUAL(status, NT_STATUS_FS_DRIVER_REQUIRED)) {
5034 /*
5035 * The response was signed, but not supported
5036 *
5037 * This is returned by the NTVFS based Samba 4.x file server
5038 * for ipc shares.
5039 */
5040 tevent_req_done(req);
5041 return;
5042 }
5043 if (tevent_req_nterror(req, status)) {
5044 return;
5045 }
5046
5047 if (state->out_output_buffer.length != 24) {
5048 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5049 return;
5050 }
5051
5052 buf = state->out_output_buffer.data;
5053
5054 capabilities = IVAL(buf, 0);
5055 guid_blob = data_blob_const(buf + 4, 16);
5056 status = GUID_from_data_blob(&guid_blob, &server_guid);
5057 if (tevent_req_nterror(req, status)) {
5058 return;
5059 }
5060 security_mode = CVAL(buf, 20);
5061 dialect = SVAL(buf, 22);
5062
5063 if (capabilities != state->conn->smb2.server.capabilities) {
5064 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5065 return;
5066 }
5067
5068 if (!GUID_equal(&server_guid, &state->conn->smb2.server.guid)) {
5069 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5070 return;
5071 }
5072
5073 if (security_mode != state->conn->smb2.server.security_mode) {
5074 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5075 return;
5076 }
5077
5078 if (dialect != state->dialect) {
5079 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5080 return;
5081 }
5082
5083 tevent_req_done(req);
5084 }
5085
5086 NTSTATUS smb2cli_validate_negotiate_info_recv(struct tevent_req *req)
5087 {
5088 return tevent_req_simple_recv_ntstatus(req);
5089 }
5090
5091 static int smbXcli_session_destructor(struct smbXcli_session *session)
5092 {
5093 if (session->conn == NULL) {
5094 return 0;
5095 }
5096
5097 DLIST_REMOVE(session->conn->sessions, session);
5098 return 0;
5099 }
5100
5101 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
5102 struct smbXcli_conn *conn)
5103 {
5104 struct smbXcli_session *session;
5105
5106 session = talloc_zero(mem_ctx, struct smbXcli_session);
5107 if (session == NULL) {
5108 return NULL;
5109 }
5110 session->smb2 = talloc_zero(session, struct smb2cli_session);
5111 if (session->smb2 == NULL) {
5112 talloc_free(session);
5113 return NULL;
5114 }
5115 talloc_set_destructor(session, smbXcli_session_destructor);
5116
5117 DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
5118 session->conn = conn;
5119
5120 memcpy(session->smb2_channel.preauth_sha512,
5121 conn->smb2.preauth_sha512,
5122 sizeof(session->smb2_channel.preauth_sha512));
5123
5124 return session;
5125 }
5126
5127 struct smbXcli_session *smbXcli_session_copy(TALLOC_CTX *mem_ctx,
5128 struct smbXcli_session *src)
5129 {
5130 struct smbXcli_session *session;
5131
5132 session = talloc_zero(mem_ctx, struct smbXcli_session);
5133 if (session == NULL) {
5134 return NULL;
5135 }
5136 session->smb2 = talloc_zero(session, struct smb2cli_session);
5137 if (session->smb2 == NULL) {
5138 talloc_free(session);
5139 return NULL;
5140 }
5141
5142 session->conn = src->conn;
5143 *session->smb2 = *src->smb2;
5144 session->smb2_channel = src->smb2_channel;
5145 session->disconnect_expired = src->disconnect_expired;
5146
5147 DLIST_ADD_END(src->conn->sessions, session, struct smbXcli_session *);
5148 talloc_set_destructor(session, smbXcli_session_destructor);
5149
5150 return session;
5151 }
5152
5153 bool smbXcli_session_is_authenticated(struct smbXcli_session *session)
5154 {
5155 const DATA_BLOB *application_key;
5156
5157 if (session->conn == NULL) {
5158 return false;
5159 }
5160
5161 /*
5162 * If we have an application key we had a session key negotiated
5163 * at auth time.
5164 */
5165 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5166 application_key = &session->smb2->application_key;
5167 } else {
5168 application_key = &session->smb1.application_key;
5169 }
5170
5171 if (application_key->length == 0) {
5172 return false;
5173 }
5174
5175 return true;
5176 }
5177
5178 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
5179 TALLOC_CTX *mem_ctx,
5180 DATA_BLOB *key)
5181 {
5182 const DATA_BLOB *application_key;
5183
5184 *key = data_blob_null;
5185
5186 if (session->conn == NULL) {
5187 return NT_STATUS_NO_USER_SESSION_KEY;
5188 }
5189
5190 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5191 application_key = &session->smb2->application_key;
5192 } else {
5193 application_key = &session->smb1.application_key;
5194 }
5195
5196 if (application_key->length == 0) {
5197 return NT_STATUS_NO_USER_SESSION_KEY;
5198 }
5199
5200 *key = data_blob_dup_talloc(mem_ctx, *application_key);
5201 if (key->data == NULL) {
5202 return NT_STATUS_NO_MEMORY;
5203 }
5204
5205 return NT_STATUS_OK;
5206 }
5207
5208 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
5209 {
5210 session->disconnect_expired = true;
5211 }
5212
5213 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
5214 {
5215 return session->smb1.session_id;
5216 }
5217
5218 void smb1cli_session_set_id(struct smbXcli_session *session,
5219 uint16_t session_id)
5220 {
5221 session->smb1.session_id = session_id;
5222 }
5223
5224 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
5225 const DATA_BLOB _session_key)
5226 {
5227 struct smbXcli_conn *conn = session->conn;
5228 uint8_t session_key[16];
5229
5230 if (conn == NULL) {
5231 return NT_STATUS_INVALID_PARAMETER_MIX;
5232 }
5233
5234 if (session->smb1.application_key.length != 0) {
5235 /*
5236 * TODO: do not allow this...
5237 *
5238 * return NT_STATUS_INVALID_PARAMETER_MIX;
5239 */
5240 data_blob_clear_free(&session->smb1.application_key);
5241 session->smb1.protected_key = false;
5242 }
5243
5244 if (_session_key.length == 0) {
5245 return NT_STATUS_OK;
5246 }
5247
5248 ZERO_STRUCT(session_key);
5249 memcpy(session_key, _session_key.data,
5250 MIN(_session_key.length, sizeof(session_key)));
5251
5252 session->smb1.application_key = data_blob_talloc(session,
5253 session_key,
5254 sizeof(session_key));
5255 ZERO_STRUCT(session_key);
5256 if (session->smb1.application_key.data == NULL) {
5257 return NT_STATUS_NO_MEMORY;
5258 }
5259
5260 session->smb1.protected_key = false;
5261
5262 return NT_STATUS_OK;
5263 }
5264
5265 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
5266 {
5267 if (session->smb1.protected_key) {
5268 /* already protected */
5269 return NT_STATUS_OK;
5270 }
5271
5272 if (session->smb1.application_key.length != 16) {
5273 return NT_STATUS_INVALID_PARAMETER_MIX;
5274 }
5275
5276 smb_key_derivation(session->smb1.application_key.data,
5277 session->smb1.application_key.length,
5278 session->smb1.application_key.data);
5279
5280 session->smb1.protected_key = true;
5281
5282 return NT_STATUS_OK;
5283 }
5284
5285 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
5286 {
5287 struct smbXcli_conn *conn = session->conn;
5288 uint8_t security_mode = 0;
5289
5290 if (conn == NULL) {
5291 return security_mode;
5292 }
5293
5294 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
5295 if (conn->mandatory_signing) {
5296 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
5297 }
5298
5299 return security_mode;
5300 }
5301
5302 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
5303 {
5304 return session->smb2->session_id;
5305 }
5306
5307 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
5308 {
5309 return session->smb2->session_flags;
5310 }
5311
5312 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
5313 uint64_t session_id,
5314 uint16_t session_flags)
5315 {
5316 session->smb2->session_id = session_id;
5317 session->smb2->session_flags = session_flags;
5318 }
5319
5320 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
5321 {
5322 session->smb2->channel_sequence += 1;
5323 }
5324
5325 uint16_t smb2cli_session_reset_channel_sequence(struct smbXcli_session *session,
5326 uint16_t channel_sequence)
5327 {
5328 uint16_t prev_cs;
5329
5330 prev_cs = session->smb2->channel_sequence;
5331 session->smb2->channel_sequence = channel_sequence;
5332
5333 return prev_cs;
5334 }
5335
5336 void smb2cli_session_start_replay(struct smbXcli_session *session)
5337 {
5338 session->smb2->replay_active = true;
5339 }
5340
5341 void smb2cli_session_stop_replay(struct smbXcli_session *session)
5342 {
5343 session->smb2->replay_active = false;
5344 }
5345
5346 NTSTATUS smb2cli_session_update_preauth(struct smbXcli_session *session,
5347 const struct iovec *iov)
5348 {
5349 struct hc_sha512state sctx;
5350 size_t i;
5351
5352 if (session->conn == NULL) {
5353 return NT_STATUS_INTERNAL_ERROR;
5354 }
5355
5356 if (session->conn->protocol < PROTOCOL_SMB3_10) {
5357 return NT_STATUS_OK;
5358 }
5359
5360 if (session->smb2_channel.signing_key.length != 0) {
5361 return NT_STATUS_OK;
5362 }
5363
5364 samba_SHA512_Init(&sctx);
5365 samba_SHA512_Update(&sctx, session->smb2_channel.preauth_sha512,
5366 sizeof(session->smb2_channel.preauth_sha512));
5367 for (i = 0; i < 3; i++) {
5368 samba_SHA512_Update(&sctx, iov[i].iov_base, iov[i].iov_len);
5369 }
5370 samba_SHA512_Final(session->smb2_channel.preauth_sha512, &sctx);
5371
5372 return NT_STATUS_OK;
5373 }
5374
5375 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
5376 const DATA_BLOB _session_key,
5377 const struct iovec *recv_iov)
5378 {
5379 struct smbXcli_conn *conn = session->conn;
5380 uint16_t no_sign_flags;
5381 uint8_t session_key[16];
5382 bool check_signature = true;
5383 uint32_t hdr_flags;
5384 NTSTATUS status;
5385 struct _derivation {
5386 DATA_BLOB label;
5387 DATA_BLOB context;
5388 };
5389 struct {
5390 struct _derivation signing;
5391 struct _derivation encryption;
5392 struct _derivation decryption;
5393 struct _derivation application;
5394 } derivation = { };
5395
5396 if (conn == NULL) {
5397 return NT_STATUS_INVALID_PARAMETER_MIX;
5398 }
5399
5400 if (recv_iov[0].iov_len != SMB2_HDR_BODY) {
5401 return NT_STATUS_INVALID_PARAMETER_MIX;
5402 }
5403
5404 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
5405
5406 if (session->smb2->session_flags & no_sign_flags) {
5407 session->smb2->should_sign = false;
5408 return NT_STATUS_OK;
5409 }
5410
5411 if (session->smb2->signing_key.length != 0) {
5412 return NT_STATUS_INVALID_PARAMETER_MIX;
5413 }
5414
5415 if (conn->protocol >= PROTOCOL_SMB3_10) {
5416 struct _derivation *d;
5417 DATA_BLOB p;
5418
5419 p = data_blob_const(session->smb2_channel.preauth_sha512,
5420 sizeof(session->smb2_channel.preauth_sha512));
5421
5422 d = &derivation.signing;
5423 d->label = data_blob_string_const_null("SMBSigningKey");
5424 d->context = p;
5425
5426 d = &derivation.encryption;
5427 d->label = data_blob_string_const_null("SMBC2SCipherKey");
5428 d->context = p;
5429
5430 d = &derivation.decryption;
5431 d->label = data_blob_string_const_null("SMBS2CCipherKey");
5432 d->context = p;
5433
5434 d = &derivation.application;
5435 d->label = data_blob_string_const_null("SMBAppKey");
5436 d->context = p;
5437
5438 } else if (conn->protocol >= PROTOCOL_SMB2_24) {
5439 struct _derivation *d;
5440
5441 d = &derivation.signing;
5442 d->label = data_blob_string_const_null("SMB2AESCMAC");
5443 d->context = data_blob_string_const_null("SmbSign");
5444
5445 d = &derivation.encryption;
5446 d->label = data_blob_string_const_null("SMB2AESCCM");
5447 d->context = data_blob_string_const_null("ServerIn ");
5448
5449 d = &derivation.decryption;
5450 d->label = data_blob_string_const_null("SMB2AESCCM");
5451 d->context = data_blob_string_const_null("ServerOut");
5452
5453 d = &derivation.application;
5454 d->label = data_blob_string_const_null("SMB2APP");
5455 d->context = data_blob_string_const_null("SmbRpc");
5456 }
5457
5458 ZERO_STRUCT(session_key);
5459 memcpy(session_key, _session_key.data,
5460 MIN(_session_key.length, sizeof(session_key)));
5461
5462 session->smb2->signing_key = data_blob_talloc(session,
5463 session_key,
5464 sizeof(session_key));
5465 if (session->smb2->signing_key.data == NULL) {
5466 ZERO_STRUCT(session_key);
5467 return NT_STATUS_NO_MEMORY;
5468 }
5469
5470 if (conn->protocol >= PROTOCOL_SMB2_24) {
5471 struct _derivation *d = &derivation.signing;
5472
5473 smb2_key_derivation(session_key, sizeof(session_key),
5474 d->label.data, d->label.length,
5475 d->context.data, d->context.length,
5476 session->smb2->signing_key.data);
5477 }
5478
5479 session->smb2->encryption_key = data_blob_dup_talloc(session,
5480 session->smb2->signing_key);
5481 if (session->smb2->encryption_key.data == NULL) {
5482 ZERO_STRUCT(session_key);
5483 return NT_STATUS_NO_MEMORY;
5484 }
5485
5486 if (conn->protocol >= PROTOCOL_SMB2_24) {
5487 struct _derivation *d = &derivation.encryption;
5488
5489 smb2_key_derivation(session_key, sizeof(session_key),
5490 d->label.data, d->label.length,
5491 d->context.data, d->context.length,
5492 session->smb2->encryption_key.data);
5493 }
5494
5495 session->smb2->decryption_key = data_blob_dup_talloc(session,
5496 session->smb2->signing_key);
5497 if (session->smb2->decryption_key.data == NULL) {
5498 ZERO_STRUCT(session_key);
5499 return NT_STATUS_NO_MEMORY;
5500 }
5501
5502 if (conn->protocol >= PROTOCOL_SMB2_24) {
5503 struct _derivation *d = &derivation.decryption;
5504
5505 smb2_key_derivation(session_key, sizeof(session_key),
5506 d->label.data, d->label.length,
5507 d->context.data, d->context.length,
5508 session->smb2->decryption_key.data);
5509 }
5510
5511 session->smb2->application_key = data_blob_dup_talloc(session,
5512 session->smb2->signing_key);
5513 if (session->smb2->application_key.data == NULL) {
5514 ZERO_STRUCT(session_key);
5515 return NT_STATUS_NO_MEMORY;
5516 }
5517
5518 if (conn->protocol >= PROTOCOL_SMB2_24) {
5519 struct _derivation *d = &derivation.application;
5520
5521 smb2_key_derivation(session_key, sizeof(session_key),
5522 d->label.data, d->label.length,
5523 d->context.data, d->context.length,
5524 session->smb2->application_key.data);
5525 }
5526 ZERO_STRUCT(session_key);
5527
5528 session->smb2_channel.signing_key = data_blob_dup_talloc(session,
5529 session->smb2->signing_key);
5530 if (session->smb2_channel.signing_key.data == NULL) {
5531 return NT_STATUS_NO_MEMORY;
5532 }
5533
5534 check_signature = conn->mandatory_signing;
5535
5536 hdr_flags = IVAL(recv_iov[0].iov_base, SMB2_HDR_FLAGS);
5537 if (hdr_flags & SMB2_HDR_FLAG_SIGNED) {
5538 /*
5539 * Sadly some vendors don't sign the
5540 * final SMB2 session setup response
5541 *
5542 * At least Windows and Samba are always doing this
5543 * if there's a session key available.
5544 *
5545 * We only check the signature if it's mandatory
5546 * or SMB2_HDR_FLAG_SIGNED is provided.
5547 */
5548 check_signature = true;
5549 }
5550
5551 if (conn->protocol >= PROTOCOL_SMB3_10) {
5552 check_signature = true;
5553 }
5554
5555 if (check_signature) {
5556 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
5557 session->conn->protocol,
5558 recv_iov, 3);
5559 if (!NT_STATUS_IS_OK(status)) {
5560 return status;
5561 }
5562 }
5563
5564 session->smb2->should_sign = false;
5565 session->smb2->should_encrypt = false;
5566
5567 if (conn->desire_signing) {
5568 session->smb2->should_sign = true;
5569 }
5570
5571 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
5572 session->smb2->should_sign = true;
5573 }
5574
5575 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
5576 session->smb2->should_encrypt = true;
5577 }
5578
5579 if (conn->protocol < PROTOCOL_SMB2_24) {
5580 session->smb2->should_encrypt = false;
5581 }
5582
5583 if (conn->smb2.server.cipher == 0) {
5584 session->smb2->should_encrypt = false;
5585 }
5586
5587 generate_random_buffer((uint8_t *)&session->smb2->nonce_high,
5588 sizeof(session->smb2->nonce_high));
5589 session->smb2->nonce_low = 1;
5590
5591 return NT_STATUS_OK;
5592 }
5593
5594 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
5595 struct smbXcli_session *session1,
5596 struct smbXcli_conn *conn,
5597 struct smbXcli_session **_session2)
5598 {
5599 struct smbXcli_session *session2;
5600
5601 if (session1->smb2->signing_key.length == 0) {
5602 return NT_STATUS_INVALID_PARAMETER_MIX;
5603 }
5604
5605 if (conn == NULL) {
5606 return NT_STATUS_INVALID_PARAMETER_MIX;
5607 }
5608
5609 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
5610 if (session2 == NULL) {
5611 return NT_STATUS_NO_MEMORY;
5612 }
5613 session2->smb2 = talloc_reference(session2, session1->smb2);
5614 if (session2->smb2 == NULL) {
5615 talloc_free(session2);
5616 return NT_STATUS_NO_MEMORY;
5617 }
5618
5619 talloc_set_destructor(session2, smbXcli_session_destructor);
5620 DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
5621 session2->conn = conn;
5622
5623 memcpy(session2->smb2_channel.preauth_sha512,
5624 conn->smb2.preauth_sha512,
5625 sizeof(session2->smb2_channel.preauth_sha512));
5626
5627 *_session2 = session2;
5628 return NT_STATUS_OK;
5629 }
5630
5631 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
5632 const DATA_BLOB _channel_key,
5633 const struct iovec *recv_iov)
5634 {
5635 struct smbXcli_conn *conn = session->conn;
5636 uint8_t channel_key[16];
5637 NTSTATUS status;
5638 struct _derivation {
5639 DATA_BLOB label;
5640 DATA_BLOB context;
5641 };
5642 struct {
5643 struct _derivation signing;
5644 } derivation = { };
5645
5646 if (conn == NULL) {
5647 return NT_STATUS_INVALID_PARAMETER_MIX;
5648 }
5649
5650 if (session->smb2_channel.signing_key.length != 0) {
5651 return NT_STATUS_INVALID_PARAMETER_MIX;
5652 }
5653
5654 if (conn->protocol >= PROTOCOL_SMB3_10) {
5655 struct _derivation *d;
5656 DATA_BLOB p;
5657
5658 p = data_blob_const(session->smb2_channel.preauth_sha512,
5659 sizeof(session->smb2_channel.preauth_sha512));
5660
5661 d = &derivation.signing;
5662 d->label = data_blob_string_const_null("SMBSigningKey");
5663 d->context = p;
5664 } else if (conn->protocol >= PROTOCOL_SMB2_24) {
5665 struct _derivation *d;
5666
5667 d = &derivation.signing;
5668 d->label = data_blob_string_const_null("SMB2AESCMAC");
5669 d->context = data_blob_string_const_null("SmbSign");
5670 }
5671
5672 ZERO_STRUCT(channel_key);
5673 memcpy(channel_key, _channel_key.data,
5674 MIN(_channel_key.length, sizeof(channel_key)));
5675
5676 session->smb2_channel.signing_key = data_blob_talloc(session,
5677 channel_key,
5678 sizeof(channel_key));
5679 if (session->smb2_channel.signing_key.data == NULL) {
5680 ZERO_STRUCT(channel_key);
5681 return NT_STATUS_NO_MEMORY;
5682 }
5683
5684 if (conn->protocol >= PROTOCOL_SMB2_24) {
5685 struct _derivation *d = &derivation.signing;
5686
5687 smb2_key_derivation(channel_key, sizeof(channel_key),
5688 d->label.data, d->label.length,
5689 d->context.data, d->context.length,
5690 session->smb2_channel.signing_key.data);
5691 }
5692 ZERO_STRUCT(channel_key);
5693
5694 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
5695 session->conn->protocol,
5696 recv_iov, 3);
5697 if (!NT_STATUS_IS_OK(status)) {
5698 return status;
5699 }
5700
5701 return NT_STATUS_OK;
5702 }
5703
5704 NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
5705 {
5706 if (session->smb2->should_encrypt) {
5707 return NT_STATUS_OK;
5708 }
5709
5710 if (session->conn->protocol < PROTOCOL_SMB2_24) {
5711 return NT_STATUS_NOT_SUPPORTED;
5712 }
5713
5714 if (session->conn->smb2.server.cipher == 0) {
5715 return NT_STATUS_NOT_SUPPORTED;
5716 }
5717
5718 if (session->smb2->signing_key.data == NULL) {
5719 return NT_STATUS_NOT_SUPPORTED;
5720 }
5721 session->smb2->should_encrypt = true;
5722 return NT_STATUS_OK;
5723 }
5724
5725 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
5726 {
5727 struct smbXcli_tcon *tcon;
5728
5729 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
5730 if (tcon == NULL) {
5731 return NULL;
5732 }
5733
5734 return tcon;
5735 }
5736
5737 void smbXcli_tcon_set_fs_attributes(struct smbXcli_tcon *tcon,
5738 uint32_t fs_attributes)
5739 {
5740 tcon->fs_attributes = fs_attributes;
5741 }
5742
5743 uint32_t smbXcli_tcon_get_fs_attributes(struct smbXcli_tcon *tcon)
5744 {
5745 return tcon->fs_attributes;
5746 }
5747
5748 bool smbXcli_tcon_is_dfs_share(struct smbXcli_tcon *tcon)
5749 {
5750 if (tcon == NULL) {
5751 return false;
5752 }
5753
5754 if (tcon->is_smb1) {
5755 if (tcon->smb1.optional_support & SMB_SHARE_IN_DFS) {
5756 return true;
5757 }
5758
5759 return false;
5760 }
5761
5762 if (tcon->smb2.capabilities & SMB2_SHARE_CAP_DFS) {
5763 return true;
5764 }
5765
5766 return false;
5767 }
5768
5769 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
5770 {
5771 return tcon->smb1.tcon_id;
5772 }
5773
5774 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
5775 {
5776 tcon->is_smb1 = true;
5777 tcon->smb1.tcon_id = tcon_id;
5778 }
5779
5780 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
5781 uint16_t tcon_id,
5782 uint16_t optional_support,
5783 uint32_t maximal_access,
5784 uint32_t guest_maximal_access,
5785 const char *service,
5786 const char *fs_type)
5787 {
5788 tcon->is_smb1 = true;
5789 tcon->fs_attributes = 0;
5790 tcon->smb1.tcon_id = tcon_id;
5791 tcon->smb1.optional_support = optional_support;
5792 tcon->smb1.maximal_access = maximal_access;
5793 tcon->smb1.guest_maximal_access = guest_maximal_access;
5794
5795 TALLOC_FREE(tcon->smb1.service);
5796 tcon->smb1.service = talloc_strdup(tcon, service);
5797 if (service != NULL && tcon->smb1.service == NULL) {
5798 return false;
5799 }
5800
5801 TALLOC_FREE(tcon->smb1.fs_type);
5802 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
5803 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
5804 return false;
5805 }
5806
5807 return true;
5808 }
5809
5810 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
5811 {
5812 return tcon->smb2.tcon_id;
5813 }
5814
5815 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
5816 {
5817 return tcon->smb2.capabilities;
5818 }
5819
5820 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
5821 struct smbXcli_session *session,
5822 uint32_t tcon_id,
5823 uint8_t type,
5824 uint32_t flags,
5825 uint32_t capabilities,
5826 uint32_t maximal_access)
5827 {
5828 tcon->is_smb1 = false;
5829 tcon->fs_attributes = 0;
5830 tcon->smb2.tcon_id = tcon_id;
5831 tcon->smb2.type = type;
5832 tcon->smb2.flags = flags;
5833 tcon->smb2.capabilities = capabilities;
5834 tcon->smb2.maximal_access = maximal_access;
5835
5836 tcon->smb2.should_sign = false;
5837 tcon->smb2.should_encrypt = false;
5838
5839 if (session == NULL) {
5840 return;
5841 }
5842
5843 tcon->smb2.should_sign = session->smb2->should_sign;
5844 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
5845
5846 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
5847 tcon->smb2.should_encrypt = true;
5848 }
5849 }
5850
5851 void smb2cli_tcon_should_sign(struct smbXcli_tcon *tcon,
5852 bool should_sign)
5853 {
5854 tcon->smb2.should_sign = should_sign;
5855 }
5856
5857 bool smb2cli_tcon_is_signing_on(struct smbXcli_tcon *tcon)
5858 {
5859 if (tcon->smb2.should_encrypt) {
5860 return true;
5861 }
5862
5863 return tcon->smb2.should_sign;
5864 }
5865
5866 void smb2cli_tcon_should_encrypt(struct smbXcli_tcon *tcon,
5867 bool should_encrypt)
5868 {
5869 tcon->smb2.should_encrypt = should_encrypt;
5870 }
5871
5872 bool smb2cli_tcon_is_encryption_on(struct smbXcli_tcon *tcon)
5873 {
5874 return tcon->smb2.should_encrypt;
5875 }
Samba GIT mirror