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util: Avoid use of includes.h
[Samba.git] / libcli / smb / smbXcli_base.c
blobcc8978975e10b031f2c8a6c0afd7e17c75ce8bea
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 "lib/util/iov_buf.h"
29 #include "../libcli/smb/smb_common.h"
30 #include "../libcli/smb/smb_seal.h"
31 #include "../libcli/smb/smb_signing.h"
32 #include "../libcli/smb/read_smb.h"
33 #include "smbXcli_base.h"
34 #include "librpc/ndr/libndr.h"
35 #include "libcli/smb/smb2_negotiate_context.h"
36 #include "lib/crypto/sha512.h"
37 #include "lib/crypto/aes.h"
38 #include "lib/crypto/aes_ccm_128.h"
39 #include "lib/crypto/aes_gcm_128.h"
40
41 struct smbXcli_conn;
42 struct smbXcli_req;
43 struct smbXcli_session;
44 struct smbXcli_tcon;
45
46 struct smbXcli_conn {
47 int sock_fd;
48 struct sockaddr_storage local_ss;
49 struct sockaddr_storage remote_ss;
50 const char *remote_name;
51
52 struct tevent_queue *outgoing;
53 struct tevent_req **pending;
54 struct tevent_req *read_smb_req;
55 struct tevent_req *suicide_req;
56
57 enum protocol_types min_protocol;
58 enum protocol_types max_protocol;
59 enum protocol_types protocol;
60 bool allow_signing;
61 bool desire_signing;
62 bool mandatory_signing;
63
64 /*
65 * The incoming dispatch function should return:
66 * - NT_STATUS_RETRY, if more incoming PDUs are expected.
67 * - NT_STATUS_OK, if no more processing is desired, e.g.
68 * the dispatch function called
69 * tevent_req_done().
70 * - All other return values disconnect the connection.
71 */
72 NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
73 TALLOC_CTX *tmp_mem,
74 uint8_t *inbuf);
75
76 struct {
77 struct {
78 uint32_t capabilities;
79 uint32_t max_xmit;
80 } client;
81
82 struct {
83 uint32_t capabilities;
84 uint32_t max_xmit;
85 uint16_t max_mux;
86 uint16_t security_mode;
87 bool readbraw;
88 bool writebraw;
89 bool lockread;
90 bool writeunlock;
91 uint32_t session_key;
92 struct GUID guid;
93 DATA_BLOB gss_blob;
94 uint8_t challenge[8];
95 const char *workgroup;
96 const char *name;
97 int time_zone;
98 NTTIME system_time;
99 } server;
100
101 uint32_t capabilities;
102 uint32_t max_xmit;
103
104 uint16_t mid;
105
106 struct smb_signing_state *signing;
107 struct smb_trans_enc_state *trans_enc;
108
109 struct tevent_req *read_braw_req;
110 } smb1;
111
112 struct {
113 struct {
114 uint32_t capabilities;
115 uint16_t security_mode;
116 struct GUID guid;
117 } client;
118
119 struct {
120 uint32_t capabilities;
121 uint16_t security_mode;
122 struct GUID guid;
123 uint32_t max_trans_size;
124 uint32_t max_read_size;
125 uint32_t max_write_size;
126 NTTIME system_time;
127 NTTIME start_time;
128 DATA_BLOB gss_blob;
129 uint16_t cipher;
130 } server;
131
132 uint64_t mid;
133 uint16_t cur_credits;
134 uint16_t max_credits;
135
136 uint32_t cc_chunk_len;
137 uint32_t cc_max_chunks;
138
139 uint8_t io_priority;
140
141 uint8_t preauth_sha512[64];
142 } smb2;
143
144 struct smbXcli_session *sessions;
145 };
146
147 struct smb2cli_session {
148 uint64_t session_id;
149 uint16_t session_flags;
150 DATA_BLOB application_key;
151 DATA_BLOB signing_key;
152 bool should_sign;
153 bool should_encrypt;
154 DATA_BLOB encryption_key;
155 DATA_BLOB decryption_key;
156 uint64_t nonce_high_random;
157 uint64_t nonce_high_max;
158 uint64_t nonce_high;
159 uint64_t nonce_low;
160 uint16_t channel_sequence;
161 bool replay_active;
162 };
163
164 struct smbXcli_session {
165 struct smbXcli_session *prev, *next;
166 struct smbXcli_conn *conn;
167
168 struct {
169 uint16_t session_id;
170 uint16_t action;
171 DATA_BLOB application_key;
172 bool protected_key;
173 } smb1;
174
175 struct smb2cli_session *smb2;
176
177 struct {
178 DATA_BLOB signing_key;
179 uint8_t preauth_sha512[64];
180 } smb2_channel;
181
182 /*
183 * this should be a short term hack
184 * until the upper layers have implemented
185 * re-authentication.
186 */
187 bool disconnect_expired;
188 };
189
190 struct smbXcli_tcon {
191 bool is_smb1;
192 uint32_t fs_attributes;
193
194 struct {
195 uint16_t tcon_id;
196 uint16_t optional_support;
197 uint32_t maximal_access;
198 uint32_t guest_maximal_access;
199 char *service;
200 char *fs_type;
201 } smb1;
202
203 struct {
204 uint32_t tcon_id;
205 uint8_t type;
206 uint32_t flags;
207 uint32_t capabilities;
208 uint32_t maximal_access;
209 bool should_sign;
210 bool should_encrypt;
211 } smb2;
212 };
213
214 struct smbXcli_req_state {
215 struct tevent_context *ev;
216 struct smbXcli_conn *conn;
217 struct smbXcli_session *session; /* maybe NULL */
218 struct smbXcli_tcon *tcon; /* maybe NULL */
219
220 uint8_t length_hdr[4];
221
222 bool one_way;
223
224 uint8_t *inbuf;
225
226 struct tevent_req *write_req;
227
228 struct {
229 /* Space for the header including the wct */
230 uint8_t hdr[HDR_VWV];
231
232 /*
233 * For normal requests, smb1cli_req_send chooses a mid.
234 * SecondaryV trans requests need to use the mid of the primary
235 * request, so we need a place to store it.
236 * Assume it is set if != 0.
237 */
238 uint16_t mid;
239
240 uint16_t *vwv;
241 uint8_t bytecount_buf[2];
242
243 #define MAX_SMB_IOV 10
244 /* length_hdr, hdr, words, byte_count, buffers */
245 struct iovec iov[1 + 3 + MAX_SMB_IOV];
246 int iov_count;
247
248 bool one_way_seqnum;
249 uint32_t seqnum;
250 struct tevent_req **chained_requests;
251
252 uint8_t recv_cmd;
253 NTSTATUS recv_status;
254 /* always an array of 3 talloc elements */
255 struct iovec *recv_iov;
256 } smb1;
257
258 struct {
259 const uint8_t *fixed;
260 uint16_t fixed_len;
261 const uint8_t *dyn;
262 uint32_t dyn_len;
263
264 uint8_t transform[SMB2_TF_HDR_SIZE];
265 uint8_t hdr[SMB2_HDR_BODY];
266 uint8_t pad[7]; /* padding space for compounding */
267
268 /*
269 * always an array of 3 talloc elements
270 * (without a SMB2_TRANSFORM header!)
271 *
272 * HDR, BODY, DYN
273 */
274 struct iovec *recv_iov;
275
276 /*
277 * the expected max for the response dyn_len
278 */
279 uint32_t max_dyn_len;
280
281 uint16_t credit_charge;
282
283 bool should_sign;
284 bool should_encrypt;
285 uint64_t encryption_session_id;
286
287 bool signing_skipped;
288 bool notify_async;
289 bool got_async;
290 uint16_t cancel_flags;
291 uint64_t cancel_mid;
292 uint64_t cancel_aid;
293 } smb2;
294 };
295
296 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
297 {
298 /*
299 * NT_STATUS_OK, means we do not notify the callers
300 */
301 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
302
303 while (conn->sessions) {
304 conn->sessions->conn = NULL;
305 DLIST_REMOVE(conn->sessions, conn->sessions);
306 }
307
308 if (conn->smb1.trans_enc) {
309 TALLOC_FREE(conn->smb1.trans_enc);
310 }
311
312 return 0;
313 }
314
315 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
316 int fd,
317 const char *remote_name,
318 enum smb_signing_setting signing_state,
319 uint32_t smb1_capabilities,
320 struct GUID *client_guid,
321 uint32_t smb2_capabilities)
322 {
323 struct smbXcli_conn *conn = NULL;
324 void *ss = NULL;
325 struct sockaddr *sa = NULL;
326 socklen_t sa_length;
327 int ret;
328
329 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
330 if (!conn) {
331 return NULL;
332 }
333
334 conn->sock_fd = fd;
335
336 conn->remote_name = talloc_strdup(conn, remote_name);
337 if (conn->remote_name == NULL) {
338 goto error;
339 }
340
341 ss = (void *)&conn->local_ss;
342 sa = (struct sockaddr *)ss;
343 sa_length = sizeof(conn->local_ss);
344 ret = getsockname(fd, sa, &sa_length);
345 if (ret == -1) {
346 goto error;
347 }
348 ss = (void *)&conn->remote_ss;
349 sa = (struct sockaddr *)ss;
350 sa_length = sizeof(conn->remote_ss);
351 ret = getpeername(fd, sa, &sa_length);
352 if (ret == -1) {
353 goto error;
354 }
355
356 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
357 if (conn->outgoing == NULL) {
358 goto error;
359 }
360 conn->pending = NULL;
361
362 conn->min_protocol = PROTOCOL_NONE;
363 conn->max_protocol = PROTOCOL_NONE;
364 conn->protocol = PROTOCOL_NONE;
365
366 switch (signing_state) {
367 case SMB_SIGNING_OFF:
368 /* never */
369 conn->allow_signing = false;
370 conn->desire_signing = false;
371 conn->mandatory_signing = false;
372 break;
373 case SMB_SIGNING_DEFAULT:
374 case SMB_SIGNING_IF_REQUIRED:
375 /* if the server requires it */
376 conn->allow_signing = true;
377 conn->desire_signing = false;
378 conn->mandatory_signing = false;
379 break;
380 case SMB_SIGNING_DESIRED:
381 /* if the server desires it */
382 conn->allow_signing = true;
383 conn->desire_signing = true;
384 conn->mandatory_signing = false;
385 break;
386 case SMB_SIGNING_IPC_DEFAULT:
387 case SMB_SIGNING_REQUIRED:
388 /* always */
389 conn->allow_signing = true;
390 conn->desire_signing = true;
391 conn->mandatory_signing = true;
392 break;
393 }
394
395 conn->smb1.client.capabilities = smb1_capabilities;
396 conn->smb1.client.max_xmit = UINT16_MAX;
397
398 conn->smb1.capabilities = conn->smb1.client.capabilities;
399 conn->smb1.max_xmit = 1024;
400
401 conn->smb1.mid = 1;
402
403 /* initialise signing */
404 conn->smb1.signing = smb_signing_init(conn,
405 conn->allow_signing,
406 conn->desire_signing,
407 conn->mandatory_signing);
408 if (!conn->smb1.signing) {
409 goto error;
410 }
411
412 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
413 if (conn->mandatory_signing) {
414 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
415 }
416 if (client_guid) {
417 conn->smb2.client.guid = *client_guid;
418 }
419 conn->smb2.client.capabilities = smb2_capabilities;
420
421 conn->smb2.cur_credits = 1;
422 conn->smb2.max_credits = 0;
423 conn->smb2.io_priority = 1;
424
425 /*
426 * Samba and Windows servers accept a maximum of 16 MiB with a maximum
427 * chunk length of 1 MiB.
428 */
429 conn->smb2.cc_chunk_len = 1024 * 1024;
430 conn->smb2.cc_max_chunks = 16;
431
432 talloc_set_destructor(conn, smbXcli_conn_destructor);
433 return conn;
434
435 error:
436 TALLOC_FREE(conn);
437 return NULL;
438 }
439
440 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
441 {
442 if (conn == NULL) {
443 return false;
444 }
445
446 if (conn->sock_fd == -1) {
447 return false;
448 }
449
450 return true;
451 }
452
453 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
454 {
455 return conn->protocol;
456 }
457
458 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
459 {
460 if (conn->protocol >= PROTOCOL_SMB2_02) {
461 return true;
462 }
463
464 if (conn->smb1.capabilities & CAP_UNICODE) {
465 return true;
466 }
467
468 return false;
469 }
470
471 /*
472 * [MS-SMB] 2.2.2.3.5 - SMB1 support for passing through
473 * query/set commands to the file system
474 */
475 bool smbXcli_conn_support_passthrough(struct smbXcli_conn *conn)
476 {
477 if (conn->protocol >= PROTOCOL_SMB2_02) {
478 return true;
479 }
480
481 if (conn->smb1.capabilities & CAP_W2K_SMBS) {
482 return true;
483 }
484
485 return false;
486 }
487
488 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
489 {
490 set_socket_options(conn->sock_fd, options);
491 }
492
493 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
494 {
495 return &conn->local_ss;
496 }
497
498 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
499 {
500 return &conn->remote_ss;
501 }
502
503 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
504 {
505 return conn->remote_name;
506 }
507
508 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
509 {
510 if (conn->protocol >= PROTOCOL_SMB2_02) {
511 /*
512 * TODO...
513 */
514 return 1;
515 }
516
517 return conn->smb1.server.max_mux;
518 }
519
520 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
521 {
522 if (conn->protocol >= PROTOCOL_SMB2_02) {
523 return conn->smb2.server.system_time;
524 }
525
526 return conn->smb1.server.system_time;
527 }
528
529 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
530 {
531 if (conn->protocol >= PROTOCOL_SMB2_02) {
532 return &conn->smb2.server.gss_blob;
533 }
534
535 return &conn->smb1.server.gss_blob;
536 }
537
538 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
539 {
540 if (conn->protocol >= PROTOCOL_SMB2_02) {
541 return &conn->smb2.server.guid;
542 }
543
544 return &conn->smb1.server.guid;
545 }
546
547 struct smbXcli_conn_samba_suicide_state {
548 struct smbXcli_conn *conn;
549 struct iovec iov;
550 uint8_t buf[9];
551 struct tevent_req *write_req;
552 };
553
554 static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
555 enum tevent_req_state req_state);
556 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
557
558 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
559 struct tevent_context *ev,
560 struct smbXcli_conn *conn,
561 uint8_t exitcode)
562 {
563 struct tevent_req *req, *subreq;
564 struct smbXcli_conn_samba_suicide_state *state;
565
566 req = tevent_req_create(mem_ctx, &state,
567 struct smbXcli_conn_samba_suicide_state);
568 if (req == NULL) {
569 return NULL;
570 }
571 state->conn = conn;
572 SIVAL(state->buf, 4, 0x74697865);
573 SCVAL(state->buf, 8, exitcode);
574 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
575
576 if (conn->suicide_req != NULL) {
577 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
578 return tevent_req_post(req, ev);
579 }
580
581 state->iov.iov_base = state->buf;
582 state->iov.iov_len = sizeof(state->buf);
583
584 subreq = writev_send(state, ev, conn->outgoing, conn->sock_fd,
585 false, &state->iov, 1);
586 if (tevent_req_nomem(subreq, req)) {
587 return tevent_req_post(req, ev);
588 }
589 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
590 state->write_req = subreq;
591
592 tevent_req_set_cleanup_fn(req, smbXcli_conn_samba_suicide_cleanup);
593
594 /*
595 * We need to use tevent_req_defer_callback()
596 * in order to allow smbXcli_conn_disconnect()
597 * to do a safe cleanup.
598 */
599 tevent_req_defer_callback(req, ev);
600 conn->suicide_req = req;
601
602 return req;
603 }
604
605 static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
606 enum tevent_req_state req_state)
607 {
608 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
609 req, struct smbXcli_conn_samba_suicide_state);
610
611 TALLOC_FREE(state->write_req);
612
613 if (state->conn == NULL) {
614 return;
615 }
616
617 if (state->conn->suicide_req == req) {
618 state->conn->suicide_req = NULL;
619 }
620 state->conn = NULL;
621 }
622
623 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
624 {
625 struct tevent_req *req = tevent_req_callback_data(
626 subreq, struct tevent_req);
627 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
628 req, struct smbXcli_conn_samba_suicide_state);
629 ssize_t nwritten;
630 int err;
631
632 state->write_req = NULL;
633
634 nwritten = writev_recv(subreq, &err);
635 TALLOC_FREE(subreq);
636 if (nwritten == -1) {
637 /* here, we need to notify all pending requests */
638 NTSTATUS status = map_nt_error_from_unix_common(err);
639 smbXcli_conn_disconnect(state->conn, status);
640 return;
641 }
642 tevent_req_done(req);
643 }
644
645 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
646 {
647 return tevent_req_simple_recv_ntstatus(req);
648 }
649
650 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
651 uint8_t exitcode)
652 {
653 TALLOC_CTX *frame = talloc_stackframe();
654 struct tevent_context *ev;
655 struct tevent_req *req;
656 NTSTATUS status = NT_STATUS_NO_MEMORY;
657 bool ok;
658
659 if (smbXcli_conn_has_async_calls(conn)) {
660 /*
661 * Can't use sync call while an async call is in flight
662 */
663 status = NT_STATUS_INVALID_PARAMETER_MIX;
664 goto fail;
665 }
666 ev = samba_tevent_context_init(frame);
667 if (ev == NULL) {
668 goto fail;
669 }
670 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
671 if (req == NULL) {
672 goto fail;
673 }
674 ok = tevent_req_poll_ntstatus(req, ev, &status);
675 if (!ok) {
676 goto fail;
677 }
678 status = smbXcli_conn_samba_suicide_recv(req);
679 fail:
680 TALLOC_FREE(frame);
681 return status;
682 }
683
684 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
685 {
686 return conn->smb1.capabilities;
687 }
688
689 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
690 {
691 return conn->smb1.max_xmit;
692 }
693
694 bool smb1cli_conn_req_possible(struct smbXcli_conn *conn)
695 {
696 size_t pending = talloc_array_length(conn->pending);
697 uint16_t possible = conn->smb1.server.max_mux;
698
699 if (pending >= possible) {
700 return false;
701 }
702
703 return true;
704 }
705
706 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
707 {
708 return conn->smb1.server.session_key;
709 }
710
711 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
712 {
713 return conn->smb1.server.challenge;
714 }
715
716 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
717 {
718 return conn->smb1.server.security_mode;
719 }
720
721 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
722 {
723 return conn->smb1.server.readbraw;
724 }
725
726 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
727 {
728 return conn->smb1.server.writebraw;
729 }
730
731 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
732 {
733 return conn->smb1.server.lockread;
734 }
735
736 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
737 {
738 return conn->smb1.server.writeunlock;
739 }
740
741 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
742 {
743 return conn->smb1.server.time_zone;
744 }
745
746 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
747 const DATA_BLOB user_session_key,
748 const DATA_BLOB response)
749 {
750 return smb_signing_activate(conn->smb1.signing,
751 user_session_key,
752 response);
753 }
754
755 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
756 const uint8_t *buf, uint32_t seqnum)
757 {
758 const uint8_t *hdr = buf + NBT_HDR_SIZE;
759 size_t len = smb_len_nbt(buf);
760
761 return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
762 }
763
764 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
765 {
766 return smb_signing_is_active(conn->smb1.signing);
767 }
768
769 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
770 struct smb_trans_enc_state *es)
771 {
772 /* Replace the old state, if any. */
773 if (conn->smb1.trans_enc) {
774 TALLOC_FREE(conn->smb1.trans_enc);
775 }
776 conn->smb1.trans_enc = es;
777 }
778
779 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
780 {
781 return common_encryption_on(conn->smb1.trans_enc);
782 }
783
784
785 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
786 {
787 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
788 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
789
790 if (NT_STATUS_IS_OK(status)) {
791 return NT_STATUS_OK;
792 }
793
794 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
795 return status;
796 }
797
798 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
799 }
800
801 /**
802 * Is the SMB command able to hold an AND_X successor
803 * @param[in] cmd The SMB command in question
804 * @retval Can we add a chained request after "cmd"?
805 */
806 bool smb1cli_is_andx_req(uint8_t cmd)
807 {
808 switch (cmd) {
809 case SMBtconX:
810 case SMBlockingX:
811 case SMBopenX:
812 case SMBreadX:
813 case SMBwriteX:
814 case SMBsesssetupX:
815 case SMBulogoffX:
816 case SMBntcreateX:
817 return true;
818 break;
819 default:
820 break;
821 }
822
823 return false;
824 }
825
826 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
827 {
828 size_t num_pending = talloc_array_length(conn->pending);
829 uint16_t result;
830
831 if (conn->protocol == PROTOCOL_NONE) {
832 /*
833 * This is what windows sends on the SMB1 Negprot request
834 * and some vendors reuse the SMB1 MID as SMB2 sequence number.
835 */
836 return 0;
837 }
838
839 while (true) {
840 size_t i;
841
842 result = conn->smb1.mid++;
843 if ((result == 0) || (result == 0xffff)) {
844 continue;
845 }
846
847 for (i=0; i<num_pending; i++) {
848 if (result == smb1cli_req_mid(conn->pending[i])) {
849 break;
850 }
851 }
852
853 if (i == num_pending) {
854 return result;
855 }
856 }
857 }
858
859 static NTSTATUS smbXcli_req_cancel_write_req(struct tevent_req *req)
860 {
861 struct smbXcli_req_state *state =
862 tevent_req_data(req,
863 struct smbXcli_req_state);
864 struct smbXcli_conn *conn = state->conn;
865 size_t num_pending = talloc_array_length(conn->pending);
866 ssize_t ret;
867 int err;
868 bool ok;
869
870 if (state->write_req == NULL) {
871 return NT_STATUS_OK;
872 }
873
874 /*
875 * Check if it's possible to cancel the request.
876 * If the result is true it's not to late.
877 * See writev_cancel().
878 */
879 ok = tevent_req_cancel(state->write_req);
880 if (ok) {
881 TALLOC_FREE(state->write_req);
882
883 if (conn->protocol >= PROTOCOL_SMB2_02) {
884 /*
885 * SMB2 has a sane signing state.
886 */
887 return NT_STATUS_OK;
888 }
889
890 if (num_pending > 1) {
891 /*
892 * We have more pending requests following us. This
893 * means the signing state will be broken for them.
894 *
895 * As a solution we could add the requests directly to
896 * our outgoing queue and do the signing in the trigger
897 * function and then use writev_send() without passing a
898 * queue. That way we'll only sign packets we're most
899 * likely send to the wire.
900 */
901 return NT_STATUS_REQUEST_OUT_OF_SEQUENCE;
902 }
903
904 /*
905 * If we're the only request that's
906 * pending, we're able to recover the signing
907 * state.
908 */
909 smb_signing_cancel_reply(conn->smb1.signing,
910 state->smb1.one_way_seqnum);
911 return NT_STATUS_OK;
912 }
913
914 ret = writev_recv(state->write_req, &err);
915 TALLOC_FREE(state->write_req);
916 if (ret == -1) {
917 return map_nt_error_from_unix_common(err);
918 }
919
920 return NT_STATUS_OK;
921 }
922
923 void smbXcli_req_unset_pending(struct tevent_req *req)
924 {
925 struct smbXcli_req_state *state =
926 tevent_req_data(req,
927 struct smbXcli_req_state);
928 struct smbXcli_conn *conn = state->conn;
929 size_t num_pending = talloc_array_length(conn->pending);
930 size_t i;
931 NTSTATUS cancel_status;
932
933 cancel_status = smbXcli_req_cancel_write_req(req);
934
935 if (state->smb1.mid != 0) {
936 /*
937 * This is a [nt]trans[2] request which waits
938 * for more than one reply.
939 */
940 if (!NT_STATUS_IS_OK(cancel_status)) {
941 /*
942 * If the write_req cancel didn't work
943 * we can't use the connection anymore.
944 */
945 smbXcli_conn_disconnect(conn, cancel_status);
946 return;
947 }
948 return;
949 }
950
951 tevent_req_set_cleanup_fn(req, NULL);
952
953 if (num_pending == 1) {
954 /*
955 * The pending read_smb tevent_req is a child of
956 * conn->pending. So if nothing is pending anymore, we need to
957 * delete the socket read fde.
958 */
959 /* TODO: smbXcli_conn_cancel_read_req */
960 TALLOC_FREE(conn->pending);
961 conn->read_smb_req = NULL;
962
963 if (!NT_STATUS_IS_OK(cancel_status)) {
964 /*
965 * If the write_req cancel didn't work
966 * we can't use the connection anymore.
967 */
968 smbXcli_conn_disconnect(conn, cancel_status);
969 return;
970 }
971 return;
972 }
973
974 for (i=0; i<num_pending; i++) {
975 if (req == conn->pending[i]) {
976 break;
977 }
978 }
979 if (i == num_pending) {
980 /*
981 * Something's seriously broken. Just returning here is the
982 * right thing nevertheless, the point of this routine is to
983 * remove ourselves from conn->pending.
984 */
985
986 if (!NT_STATUS_IS_OK(cancel_status)) {
987 /*
988 * If the write_req cancel didn't work
989 * we can't use the connection anymore.
990 */
991 smbXcli_conn_disconnect(conn, cancel_status);
992 return;
993 }
994 return;
995 }
996
997 /*
998 * Remove ourselves from the conn->pending array
999 */
1000 for (; i < (num_pending - 1); i++) {
1001 conn->pending[i] = conn->pending[i+1];
1002 }
1003
1004 /*
1005 * No NULL check here, we're shrinking by sizeof(void *), and
1006 * talloc_realloc just adjusts the size for this.
1007 */
1008 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
1009 num_pending - 1);
1010
1011 if (!NT_STATUS_IS_OK(cancel_status)) {
1012 /*
1013 * If the write_req cancel didn't work
1014 * we can't use the connection anymore.
1015 */
1016 smbXcli_conn_disconnect(conn, cancel_status);
1017 return;
1018 }
1019 return;
1020 }
1021
1022 static void smbXcli_req_cleanup(struct tevent_req *req,
1023 enum tevent_req_state req_state)
1024 {
1025 struct smbXcli_req_state *state =
1026 tevent_req_data(req,
1027 struct smbXcli_req_state);
1028 struct smbXcli_conn *conn = state->conn;
1029 NTSTATUS cancel_status;
1030
1031 switch (req_state) {
1032 case TEVENT_REQ_RECEIVED:
1033 /*
1034 * Make sure we really remove it from
1035 * the pending array on destruction.
1036 *
1037 * smbXcli_req_unset_pending() calls
1038 * smbXcli_req_cancel_write_req() internal
1039 */
1040 state->smb1.mid = 0;
1041 smbXcli_req_unset_pending(req);
1042 return;
1043 default:
1044 cancel_status = smbXcli_req_cancel_write_req(req);
1045 if (!NT_STATUS_IS_OK(cancel_status)) {
1046 /*
1047 * If the write_req cancel didn't work
1048 * we can't use the connection anymore.
1049 */
1050 smbXcli_conn_disconnect(conn, cancel_status);
1051 return;
1052 }
1053 return;
1054 }
1055 }
1056
1057 static bool smb1cli_req_cancel(struct tevent_req *req);
1058 static bool smb2cli_req_cancel(struct tevent_req *req);
1059
1060 static bool smbXcli_req_cancel(struct tevent_req *req)
1061 {
1062 struct smbXcli_req_state *state =
1063 tevent_req_data(req,
1064 struct smbXcli_req_state);
1065
1066 if (!smbXcli_conn_is_connected(state->conn)) {
1067 return false;
1068 }
1069
1070 if (state->conn->protocol == PROTOCOL_NONE) {
1071 return false;
1072 }
1073
1074 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
1075 return smb2cli_req_cancel(req);
1076 }
1077
1078 return smb1cli_req_cancel(req);
1079 }
1080
1081 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
1082
1083 bool smbXcli_req_set_pending(struct tevent_req *req)
1084 {
1085 struct smbXcli_req_state *state =
1086 tevent_req_data(req,
1087 struct smbXcli_req_state);
1088 struct smbXcli_conn *conn;
1089 struct tevent_req **pending;
1090 size_t num_pending;
1091
1092 conn = state->conn;
1093
1094 if (!smbXcli_conn_is_connected(conn)) {
1095 return false;
1096 }
1097
1098 num_pending = talloc_array_length(conn->pending);
1099
1100 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
1101 num_pending+1);
1102 if (pending == NULL) {
1103 return false;
1104 }
1105 pending[num_pending] = req;
1106 conn->pending = pending;
1107 tevent_req_set_cleanup_fn(req, smbXcli_req_cleanup);
1108 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1109
1110 if (!smbXcli_conn_receive_next(conn)) {
1111 /*
1112 * the caller should notify the current request
1113 *
1114 * And all other pending requests get notified
1115 * by smbXcli_conn_disconnect().
1116 */
1117 smbXcli_req_unset_pending(req);
1118 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1119 return false;
1120 }
1121
1122 return true;
1123 }
1124
1125 static void smbXcli_conn_received(struct tevent_req *subreq);
1126
1127 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
1128 {
1129 size_t num_pending = talloc_array_length(conn->pending);
1130 struct tevent_req *req;
1131 struct smbXcli_req_state *state;
1132
1133 if (conn->read_smb_req != NULL) {
1134 return true;
1135 }
1136
1137 if (num_pending == 0) {
1138 if (conn->smb2.mid < UINT64_MAX) {
1139 /* no more pending requests, so we are done for now */
1140 return true;
1141 }
1142
1143 /*
1144 * If there are no more SMB2 requests possible,
1145 * because we are out of message ids,
1146 * we need to disconnect.
1147 */
1148 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
1149 return true;
1150 }
1151
1152 req = conn->pending[0];
1153 state = tevent_req_data(req, struct smbXcli_req_state);
1154
1155 /*
1156 * We're the first ones, add the read_smb request that waits for the
1157 * answer from the server
1158 */
1159 conn->read_smb_req = read_smb_send(conn->pending,
1160 state->ev,
1161 conn->sock_fd);
1162 if (conn->read_smb_req == NULL) {
1163 return false;
1164 }
1165 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
1166 return true;
1167 }
1168
1169 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
1170 {
1171 struct smbXcli_session *session;
1172 int sock_fd = conn->sock_fd;
1173
1174 tevent_queue_stop(conn->outgoing);
1175
1176 conn->sock_fd = -1;
1177
1178 session = conn->sessions;
1179 if (talloc_array_length(conn->pending) == 0) {
1180 /*
1181 * if we do not have pending requests
1182 * there is no need to update the channel_sequence
1183 */
1184 session = NULL;
1185 }
1186 for (; session; session = session->next) {
1187 smb2cli_session_increment_channel_sequence(session);
1188 }
1189
1190 if (conn->suicide_req != NULL) {
1191 /*
1192 * smbXcli_conn_samba_suicide_send()
1193 * used tevent_req_defer_callback() already.
1194 */
1195 if (!NT_STATUS_IS_OK(status)) {
1196 tevent_req_nterror(conn->suicide_req, status);
1197 }
1198 conn->suicide_req = NULL;
1199 }
1200
1201 /*
1202 * Cancel all pending requests. We do not do a for-loop walking
1203 * conn->pending because that array changes in
1204 * smbXcli_req_unset_pending.
1205 */
1206 while (talloc_array_length(conn->pending) > 0) {
1207 struct tevent_req *req;
1208 struct smbXcli_req_state *state;
1209 struct tevent_req **chain;
1210 size_t num_chained;
1211 size_t i;
1212
1213 req = conn->pending[0];
1214 state = tevent_req_data(req, struct smbXcli_req_state);
1215
1216 if (state->smb1.chained_requests == NULL) {
1217 bool in_progress;
1218
1219 /*
1220 * We're dead. No point waiting for trans2
1221 * replies.
1222 */
1223 state->smb1.mid = 0;
1224
1225 smbXcli_req_unset_pending(req);
1226
1227 if (NT_STATUS_IS_OK(status)) {
1228 /* do not notify the callers */
1229 continue;
1230 }
1231
1232 in_progress = tevent_req_is_in_progress(req);
1233 if (!in_progress) {
1234 /*
1235 * already finished
1236 */
1237 continue;
1238 }
1239
1240 /*
1241 * we need to defer the callback, because we may notify
1242 * more then one caller.
1243 */
1244 tevent_req_defer_callback(req, state->ev);
1245 tevent_req_nterror(req, status);
1246 continue;
1247 }
1248
1249 chain = talloc_move(conn, &state->smb1.chained_requests);
1250 num_chained = talloc_array_length(chain);
1251
1252 for (i=0; i<num_chained; i++) {
1253 bool in_progress;
1254
1255 req = chain[i];
1256 state = tevent_req_data(req, struct smbXcli_req_state);
1257
1258 /*
1259 * We're dead. No point waiting for trans2
1260 * replies.
1261 */
1262 state->smb1.mid = 0;
1263
1264 smbXcli_req_unset_pending(req);
1265
1266 if (NT_STATUS_IS_OK(status)) {
1267 /* do not notify the callers */
1268 continue;
1269 }
1270
1271 in_progress = tevent_req_is_in_progress(req);
1272 if (!in_progress) {
1273 /*
1274 * already finished
1275 */
1276 continue;
1277 }
1278
1279 /*
1280 * we need to defer the callback, because we may notify
1281 * more than one caller.
1282 */
1283 tevent_req_defer_callback(req, state->ev);
1284 tevent_req_nterror(req, status);
1285 }
1286 TALLOC_FREE(chain);
1287 }
1288
1289 if (sock_fd != -1) {
1290 close(sock_fd);
1291 }
1292 }
1293
1294 /*
1295 * Fetch a smb request's mid. Only valid after the request has been sent by
1296 * smb1cli_req_send().
1297 */
1298 uint16_t smb1cli_req_mid(struct tevent_req *req)
1299 {
1300 struct smbXcli_req_state *state =
1301 tevent_req_data(req,
1302 struct smbXcli_req_state);
1303
1304 if (state->smb1.mid != 0) {
1305 return state->smb1.mid;
1306 }
1307
1308 return SVAL(state->smb1.hdr, HDR_MID);
1309 }
1310
1311 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1312 {
1313 struct smbXcli_req_state *state =
1314 tevent_req_data(req,
1315 struct smbXcli_req_state);
1316
1317 state->smb1.mid = mid;
1318 }
1319
1320 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1321 {
1322 struct smbXcli_req_state *state =
1323 tevent_req_data(req,
1324 struct smbXcli_req_state);
1325
1326 return state->smb1.seqnum;
1327 }
1328
1329 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1330 {
1331 struct smbXcli_req_state *state =
1332 tevent_req_data(req,
1333 struct smbXcli_req_state);
1334
1335 state->smb1.seqnum = seqnum;
1336 }
1337
1338 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1339 {
1340 ssize_t ret = iov_buflen(iov, count);
1341
1342 /* Ignore the overflow case for now ... */
1343 return ret;
1344 }
1345
1346 static void smb1cli_req_flags(enum protocol_types protocol,
1347 uint32_t smb1_capabilities,
1348 uint8_t smb_command,
1349 uint8_t additional_flags,
1350 uint8_t clear_flags,
1351 uint8_t *_flags,
1352 uint16_t additional_flags2,
1353 uint16_t clear_flags2,
1354 uint16_t *_flags2)
1355 {
1356 uint8_t flags = 0;
1357 uint16_t flags2 = 0;
1358
1359 if (protocol >= PROTOCOL_LANMAN1) {
1360 flags |= FLAG_CASELESS_PATHNAMES;
1361 flags |= FLAG_CANONICAL_PATHNAMES;
1362 }
1363
1364 if (protocol >= PROTOCOL_LANMAN2) {
1365 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1366 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1367 }
1368
1369 if (protocol >= PROTOCOL_NT1) {
1370 flags2 |= FLAGS2_IS_LONG_NAME;
1371
1372 if (smb1_capabilities & CAP_UNICODE) {
1373 flags2 |= FLAGS2_UNICODE_STRINGS;
1374 }
1375 if (smb1_capabilities & CAP_STATUS32) {
1376 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1377 }
1378 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1379 flags2 |= FLAGS2_EXTENDED_SECURITY;
1380 }
1381 }
1382
1383 flags |= additional_flags;
1384 flags &= ~clear_flags;
1385 flags2 |= additional_flags2;
1386 flags2 &= ~clear_flags2;
1387
1388 *_flags = flags;
1389 *_flags2 = flags2;
1390 }
1391
1392 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1393
1394 static bool smb1cli_req_cancel(struct tevent_req *req)
1395 {
1396 struct smbXcli_req_state *state =
1397 tevent_req_data(req,
1398 struct smbXcli_req_state);
1399 uint8_t flags;
1400 uint16_t flags2;
1401 uint32_t pid;
1402 uint16_t mid;
1403 struct tevent_req *subreq;
1404 NTSTATUS status;
1405
1406 flags = CVAL(state->smb1.hdr, HDR_FLG);
1407 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1408 pid = SVAL(state->smb1.hdr, HDR_PID);
1409 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1410 mid = SVAL(state->smb1.hdr, HDR_MID);
1411
1412 subreq = smb1cli_req_create(state, state->ev,
1413 state->conn,
1414 SMBntcancel,
1415 flags, 0,
1416 flags2, 0,
1417 0, /* timeout */
1418 pid,
1419 state->tcon,
1420 state->session,
1421 0, NULL, /* vwv */
1422 0, NULL); /* bytes */
1423 if (subreq == NULL) {
1424 return false;
1425 }
1426 smb1cli_req_set_mid(subreq, mid);
1427
1428 status = smb1cli_req_chain_submit(&subreq, 1);
1429 if (!NT_STATUS_IS_OK(status)) {
1430 TALLOC_FREE(subreq);
1431 return false;
1432 }
1433 smb1cli_req_set_mid(subreq, 0);
1434
1435 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1436
1437 return true;
1438 }
1439
1440 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1441 {
1442 /* we do not care about the result */
1443 TALLOC_FREE(subreq);
1444 }
1445
1446 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1447 struct tevent_context *ev,
1448 struct smbXcli_conn *conn,
1449 uint8_t smb_command,
1450 uint8_t additional_flags,
1451 uint8_t clear_flags,
1452 uint16_t additional_flags2,
1453 uint16_t clear_flags2,
1454 uint32_t timeout_msec,
1455 uint32_t pid,
1456 struct smbXcli_tcon *tcon,
1457 struct smbXcli_session *session,
1458 uint8_t wct, uint16_t *vwv,
1459 int iov_count,
1460 struct iovec *bytes_iov)
1461 {
1462 struct tevent_req *req;
1463 struct smbXcli_req_state *state;
1464 uint8_t flags = 0;
1465 uint16_t flags2 = 0;
1466 uint16_t uid = 0;
1467 uint16_t tid = 0;
1468 ssize_t num_bytes;
1469
1470 if (iov_count > MAX_SMB_IOV) {
1471 /*
1472 * Should not happen :-)
1473 */
1474 return NULL;
1475 }
1476
1477 req = tevent_req_create(mem_ctx, &state,
1478 struct smbXcli_req_state);
1479 if (req == NULL) {
1480 return NULL;
1481 }
1482 state->ev = ev;
1483 state->conn = conn;
1484 state->session = session;
1485 state->tcon = tcon;
1486
1487 if (session) {
1488 uid = session->smb1.session_id;
1489 }
1490
1491 if (tcon) {
1492 tid = tcon->smb1.tcon_id;
1493
1494 if (tcon->fs_attributes & FILE_CASE_SENSITIVE_SEARCH) {
1495 clear_flags |= FLAG_CASELESS_PATHNAMES;
1496 } else {
1497 /* Default setting, case insensitive. */
1498 additional_flags |= FLAG_CASELESS_PATHNAMES;
1499 }
1500
1501 if (smbXcli_conn_dfs_supported(conn) &&
1502 smbXcli_tcon_is_dfs_share(tcon))
1503 {
1504 additional_flags2 |= FLAGS2_DFS_PATHNAMES;
1505 }
1506 }
1507
1508 state->smb1.recv_cmd = 0xFF;
1509 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1510 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1511 if (state->smb1.recv_iov == NULL) {
1512 TALLOC_FREE(req);
1513 return NULL;
1514 }
1515
1516 smb1cli_req_flags(conn->protocol,
1517 conn->smb1.capabilities,
1518 smb_command,
1519 additional_flags,
1520 clear_flags,
1521 &flags,
1522 additional_flags2,
1523 clear_flags2,
1524 &flags2);
1525
1526 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1527 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1528 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1529 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1530 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1531 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1532 SSVAL(state->smb1.hdr, HDR_TID, tid);
1533 SSVAL(state->smb1.hdr, HDR_PID, pid);
1534 SSVAL(state->smb1.hdr, HDR_UID, uid);
1535 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1536 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1537
1538 state->smb1.vwv = vwv;
1539
1540 num_bytes = iov_buflen(bytes_iov, iov_count);
1541 if (num_bytes == -1) {
1542 /*
1543 * I'd love to add a check for num_bytes<=UINT16_MAX here, but
1544 * the smbclient->samba connections can lie and transfer more.
1545 */
1546 TALLOC_FREE(req);
1547 return NULL;
1548 }
1549
1550 SSVAL(state->smb1.bytecount_buf, 0, num_bytes);
1551
1552 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1553 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1554 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1555 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1556 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1557 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1558 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1559 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1560
1561 if (iov_count != 0) {
1562 memcpy(&state->smb1.iov[4], bytes_iov,
1563 iov_count * sizeof(*bytes_iov));
1564 }
1565 state->smb1.iov_count = iov_count + 4;
1566
1567 if (timeout_msec > 0) {
1568 struct timeval endtime;
1569
1570 endtime = timeval_current_ofs_msec(timeout_msec);
1571 if (!tevent_req_set_endtime(req, ev, endtime)) {
1572 return req;
1573 }
1574 }
1575
1576 switch (smb_command) {
1577 case SMBtranss:
1578 case SMBtranss2:
1579 case SMBnttranss:
1580 state->one_way = true;
1581 break;
1582 case SMBntcancel:
1583 state->one_way = true;
1584 state->smb1.one_way_seqnum = true;
1585 break;
1586 case SMBlockingX:
1587 if ((wct == 8) &&
1588 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1589 state->one_way = true;
1590 }
1591 break;
1592 }
1593
1594 return req;
1595 }
1596
1597 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1598 struct iovec *iov, int iov_count,
1599 uint32_t *seqnum,
1600 bool one_way_seqnum)
1601 {
1602 TALLOC_CTX *frame = NULL;
1603 uint8_t *buf;
1604
1605 /*
1606 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1607 * iovec directly. MD5Update would do that just fine.
1608 */
1609
1610 if (iov_count < 4) {
1611 return NT_STATUS_INVALID_PARAMETER_MIX;
1612 }
1613 if (iov[0].iov_len != NBT_HDR_SIZE) {
1614 return NT_STATUS_INVALID_PARAMETER_MIX;
1615 }
1616 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1617 return NT_STATUS_INVALID_PARAMETER_MIX;
1618 }
1619 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1620 return NT_STATUS_INVALID_PARAMETER_MIX;
1621 }
1622 if (iov[3].iov_len != sizeof(uint16_t)) {
1623 return NT_STATUS_INVALID_PARAMETER_MIX;
1624 }
1625
1626 frame = talloc_stackframe();
1627
1628 buf = iov_concat(frame, &iov[1], iov_count - 1);
1629 if (buf == NULL) {
1630 return NT_STATUS_NO_MEMORY;
1631 }
1632
1633 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1634 one_way_seqnum);
1635 smb_signing_sign_pdu(conn->smb1.signing,
1636 buf, talloc_get_size(buf),
1637 *seqnum);
1638 memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1639
1640 TALLOC_FREE(frame);
1641 return NT_STATUS_OK;
1642 }
1643
1644 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1645 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1646 TALLOC_CTX *tmp_mem,
1647 uint8_t *inbuf);
1648
1649 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1650 struct smbXcli_req_state *state,
1651 struct iovec *iov, int iov_count)
1652 {
1653 struct tevent_req *subreq;
1654 NTSTATUS status;
1655 uint8_t cmd;
1656 uint16_t mid;
1657 ssize_t nbtlen;
1658
1659 if (!smbXcli_conn_is_connected(state->conn)) {
1660 return NT_STATUS_CONNECTION_DISCONNECTED;
1661 }
1662
1663 if (state->conn->protocol > PROTOCOL_NT1) {
1664 return NT_STATUS_REVISION_MISMATCH;
1665 }
1666
1667 if (iov_count < 4) {
1668 return NT_STATUS_INVALID_PARAMETER_MIX;
1669 }
1670 if (iov[0].iov_len != NBT_HDR_SIZE) {
1671 return NT_STATUS_INVALID_PARAMETER_MIX;
1672 }
1673 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1674 return NT_STATUS_INVALID_PARAMETER_MIX;
1675 }
1676 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1677 return NT_STATUS_INVALID_PARAMETER_MIX;
1678 }
1679 if (iov[3].iov_len != sizeof(uint16_t)) {
1680 return NT_STATUS_INVALID_PARAMETER_MIX;
1681 }
1682
1683 cmd = CVAL(iov[1].iov_base, HDR_COM);
1684 if (cmd == SMBreadBraw) {
1685 if (smbXcli_conn_has_async_calls(state->conn)) {
1686 return NT_STATUS_INVALID_PARAMETER_MIX;
1687 }
1688 state->conn->smb1.read_braw_req = req;
1689 }
1690
1691 if (state->smb1.mid != 0) {
1692 mid = state->smb1.mid;
1693 } else {
1694 mid = smb1cli_alloc_mid(state->conn);
1695 }
1696 SSVAL(iov[1].iov_base, HDR_MID, mid);
1697
1698 nbtlen = iov_buflen(&iov[1], iov_count-1);
1699 if ((nbtlen == -1) || (nbtlen > 0x1FFFF)) {
1700 return NT_STATUS_INVALID_PARAMETER_MIX;
1701 }
1702
1703 _smb_setlen_nbt(iov[0].iov_base, nbtlen);
1704
1705 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1706 &state->smb1.seqnum,
1707 state->smb1.one_way_seqnum);
1708
1709 if (!NT_STATUS_IS_OK(status)) {
1710 return status;
1711 }
1712
1713 /*
1714 * If we supported multiple encrytion contexts
1715 * here we'd look up based on tid.
1716 */
1717 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1718 char *buf, *enc_buf;
1719
1720 buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
1721 if (buf == NULL) {
1722 return NT_STATUS_NO_MEMORY;
1723 }
1724 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1725 (char *)buf, &enc_buf);
1726 TALLOC_FREE(buf);
1727 if (!NT_STATUS_IS_OK(status)) {
1728 DEBUG(0, ("Error in encrypting client message: %s\n",
1729 nt_errstr(status)));
1730 return status;
1731 }
1732 buf = (char *)talloc_memdup(state, enc_buf,
1733 smb_len_nbt(enc_buf)+4);
1734 SAFE_FREE(enc_buf);
1735 if (buf == NULL) {
1736 return NT_STATUS_NO_MEMORY;
1737 }
1738 iov[0].iov_base = (void *)buf;
1739 iov[0].iov_len = talloc_get_size(buf);
1740 iov_count = 1;
1741 }
1742
1743 if (state->conn->dispatch_incoming == NULL) {
1744 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1745 }
1746
1747 if (!smbXcli_req_set_pending(req)) {
1748 return NT_STATUS_NO_MEMORY;
1749 }
1750
1751 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1752
1753 subreq = writev_send(state, state->ev, state->conn->outgoing,
1754 state->conn->sock_fd, false, iov, iov_count);
1755 if (subreq == NULL) {
1756 return NT_STATUS_NO_MEMORY;
1757 }
1758 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1759 state->write_req = subreq;
1760
1761 return NT_STATUS_OK;
1762 }
1763
1764 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1765 struct tevent_context *ev,
1766 struct smbXcli_conn *conn,
1767 uint8_t smb_command,
1768 uint8_t additional_flags,
1769 uint8_t clear_flags,
1770 uint16_t additional_flags2,
1771 uint16_t clear_flags2,
1772 uint32_t timeout_msec,
1773 uint32_t pid,
1774 struct smbXcli_tcon *tcon,
1775 struct smbXcli_session *session,
1776 uint8_t wct, uint16_t *vwv,
1777 uint32_t num_bytes,
1778 const uint8_t *bytes)
1779 {
1780 struct tevent_req *req;
1781 struct iovec iov;
1782 NTSTATUS status;
1783
1784 iov.iov_base = discard_const_p(void, bytes);
1785 iov.iov_len = num_bytes;
1786
1787 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1788 additional_flags, clear_flags,
1789 additional_flags2, clear_flags2,
1790 timeout_msec,
1791 pid, tcon, session,
1792 wct, vwv, 1, &iov);
1793 if (req == NULL) {
1794 return NULL;
1795 }
1796 if (!tevent_req_is_in_progress(req)) {
1797 return tevent_req_post(req, ev);
1798 }
1799 status = smb1cli_req_chain_submit(&req, 1);
1800 if (tevent_req_nterror(req, status)) {
1801 return tevent_req_post(req, ev);
1802 }
1803 return req;
1804 }
1805
1806 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1807 {
1808 struct tevent_req *req =
1809 tevent_req_callback_data(subreq,
1810 struct tevent_req);
1811 struct smbXcli_req_state *state =
1812 tevent_req_data(req,
1813 struct smbXcli_req_state);
1814 ssize_t nwritten;
1815 int err;
1816
1817 state->write_req = NULL;
1818
1819 nwritten = writev_recv(subreq, &err);
1820 TALLOC_FREE(subreq);
1821 if (nwritten == -1) {
1822 /* here, we need to notify all pending requests */
1823 NTSTATUS status = map_nt_error_from_unix_common(err);
1824 smbXcli_conn_disconnect(state->conn, status);
1825 return;
1826 }
1827
1828 if (state->one_way) {
1829 state->inbuf = NULL;
1830 tevent_req_done(req);
1831 return;
1832 }
1833 }
1834
1835 static void smbXcli_conn_received(struct tevent_req *subreq)
1836 {
1837 struct smbXcli_conn *conn =
1838 tevent_req_callback_data(subreq,
1839 struct smbXcli_conn);
1840 TALLOC_CTX *frame = talloc_stackframe();
1841 NTSTATUS status;
1842 uint8_t *inbuf;
1843 ssize_t received;
1844 int err;
1845
1846 if (subreq != conn->read_smb_req) {
1847 DEBUG(1, ("Internal error: cli_smb_received called with "
1848 "unexpected subreq\n"));
1849 smbXcli_conn_disconnect(conn, NT_STATUS_INTERNAL_ERROR);
1850 TALLOC_FREE(frame);
1851 return;
1852 }
1853 conn->read_smb_req = NULL;
1854
1855 received = read_smb_recv(subreq, frame, &inbuf, &err);
1856 TALLOC_FREE(subreq);
1857 if (received == -1) {
1858 status = map_nt_error_from_unix_common(err);
1859 smbXcli_conn_disconnect(conn, status);
1860 TALLOC_FREE(frame);
1861 return;
1862 }
1863
1864 status = conn->dispatch_incoming(conn, frame, inbuf);
1865 TALLOC_FREE(frame);
1866 if (NT_STATUS_IS_OK(status)) {
1867 /*
1868 * We should not do any more processing
1869 * as the dispatch function called
1870 * tevent_req_done().
1871 */
1872 return;
1873 }
1874
1875 if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1876 /*
1877 * We got an error, so notify all pending requests
1878 */
1879 smbXcli_conn_disconnect(conn, status);
1880 return;
1881 }
1882
1883 /*
1884 * We got NT_STATUS_RETRY, so we may ask for a
1885 * next incoming pdu.
1886 */
1887 if (!smbXcli_conn_receive_next(conn)) {
1888 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1889 }
1890 }
1891
1892 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1893 struct iovec **piov, int *pnum_iov)
1894 {
1895 struct iovec *iov;
1896 int num_iov;
1897 size_t buflen;
1898 size_t taken;
1899 size_t remaining;
1900 uint8_t *hdr;
1901 uint8_t cmd;
1902 uint32_t wct_ofs;
1903 NTSTATUS status;
1904 size_t min_size = MIN_SMB_SIZE;
1905
1906 buflen = smb_len_tcp(buf);
1907 taken = 0;
1908
1909 hdr = buf + NBT_HDR_SIZE;
1910
1911 status = smb1cli_pull_raw_error(hdr);
1912 if (NT_STATUS_IS_ERR(status)) {
1913 /*
1914 * This is an ugly hack to support OS/2
1915 * which skips the byte_count in the DATA block
1916 * on some error responses.
1917 *
1918 * See bug #9096
1919 */
1920 min_size -= sizeof(uint16_t);
1921 }
1922
1923 if (buflen < min_size) {
1924 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1925 }
1926
1927 /*
1928 * This returns iovec elements in the following order:
1929 *
1930 * - SMB header
1931 *
1932 * - Parameter Block
1933 * - Data Block
1934 *
1935 * - Parameter Block
1936 * - Data Block
1937 *
1938 * - Parameter Block
1939 * - Data Block
1940 */
1941 num_iov = 1;
1942
1943 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1944 if (iov == NULL) {
1945 return NT_STATUS_NO_MEMORY;
1946 }
1947 iov[0].iov_base = hdr;
1948 iov[0].iov_len = HDR_WCT;
1949 taken += HDR_WCT;
1950
1951 cmd = CVAL(hdr, HDR_COM);
1952 wct_ofs = HDR_WCT;
1953
1954 while (true) {
1955 size_t len = buflen - taken;
1956 struct iovec *cur;
1957 struct iovec *iov_tmp;
1958 uint8_t wct;
1959 uint32_t bcc_ofs;
1960 uint16_t bcc;
1961 size_t needed;
1962
1963 /*
1964 * we need at least WCT
1965 */
1966 needed = sizeof(uint8_t);
1967 if (len < needed) {
1968 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1969 __location__, (int)len, (int)needed));
1970 goto inval;
1971 }
1972
1973 /*
1974 * Now we check if the specified words are there
1975 */
1976 wct = CVAL(hdr, wct_ofs);
1977 needed += wct * sizeof(uint16_t);
1978 if (len < needed) {
1979 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1980 __location__, (int)len, (int)needed));
1981 goto inval;
1982 }
1983
1984 if ((num_iov == 1) &&
1985 (len == needed) &&
1986 NT_STATUS_IS_ERR(status))
1987 {
1988 /*
1989 * This is an ugly hack to support OS/2
1990 * which skips the byte_count in the DATA block
1991 * on some error responses.
1992 *
1993 * See bug #9096
1994 */
1995 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1996 num_iov + 2);
1997 if (iov_tmp == NULL) {
1998 TALLOC_FREE(iov);
1999 return NT_STATUS_NO_MEMORY;
2000 }
2001 iov = iov_tmp;
2002 cur = &iov[num_iov];
2003 num_iov += 2;
2004
2005 cur[0].iov_len = 0;
2006 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
2007 cur[1].iov_len = 0;
2008 cur[1].iov_base = cur[0].iov_base;
2009
2010 taken += needed;
2011 break;
2012 }
2013
2014 /*
2015 * we need at least BCC
2016 */
2017 needed += sizeof(uint16_t);
2018 if (len < needed) {
2019 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
2020 __location__, (int)len, (int)needed));
2021 goto inval;
2022 }
2023
2024 /*
2025 * Now we check if the specified bytes are there
2026 */
2027 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
2028 bcc = SVAL(hdr, bcc_ofs);
2029 needed += bcc * sizeof(uint8_t);
2030 if (len < needed) {
2031 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
2032 __location__, (int)len, (int)needed));
2033 goto inval;
2034 }
2035
2036 /*
2037 * we allocate 2 iovec structures for words and bytes
2038 */
2039 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
2040 num_iov + 2);
2041 if (iov_tmp == NULL) {
2042 TALLOC_FREE(iov);
2043 return NT_STATUS_NO_MEMORY;
2044 }
2045 iov = iov_tmp;
2046 cur = &iov[num_iov];
2047 num_iov += 2;
2048
2049 cur[0].iov_len = wct * sizeof(uint16_t);
2050 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
2051 cur[1].iov_len = bcc * sizeof(uint8_t);
2052 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
2053
2054 taken += needed;
2055
2056 if (!smb1cli_is_andx_req(cmd)) {
2057 /*
2058 * If the current command does not have AndX chanining
2059 * we are done.
2060 */
2061 break;
2062 }
2063
2064 if (wct == 0 && bcc == 0) {
2065 /*
2066 * An empty response also ends the chain,
2067 * most likely with an error.
2068 */
2069 break;
2070 }
2071
2072 if (wct < 2) {
2073 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
2074 __location__, (int)wct, (int)cmd));
2075 goto inval;
2076 }
2077 cmd = CVAL(cur[0].iov_base, 0);
2078 if (cmd == 0xFF) {
2079 /*
2080 * If it is the end of the chain we are also done.
2081 */
2082 break;
2083 }
2084 wct_ofs = SVAL(cur[0].iov_base, 2);
2085
2086 if (wct_ofs < taken) {
2087 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2088 }
2089 if (wct_ofs > buflen) {
2090 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2091 }
2092
2093 /*
2094 * we consumed everything up to the start of the next
2095 * parameter block.
2096 */
2097 taken = wct_ofs;
2098 }
2099
2100 remaining = buflen - taken;
2101
2102 if (remaining > 0 && num_iov >= 3) {
2103 /*
2104 * The last DATA block gets the remaining
2105 * bytes, this is needed to support
2106 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
2107 */
2108 iov[num_iov-1].iov_len += remaining;
2109 }
2110
2111 *piov = iov;
2112 *pnum_iov = num_iov;
2113 return NT_STATUS_OK;
2114
2115 inval:
2116 TALLOC_FREE(iov);
2117 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2118 }
2119
2120 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2121 TALLOC_CTX *tmp_mem,
2122 uint8_t *inbuf)
2123 {
2124 struct tevent_req *req;
2125 struct smbXcli_req_state *state;
2126 NTSTATUS status;
2127 size_t num_pending;
2128 size_t i;
2129 uint8_t cmd;
2130 uint16_t mid;
2131 bool oplock_break;
2132 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
2133 size_t len = smb_len_tcp(inbuf);
2134 struct iovec *iov = NULL;
2135 int num_iov = 0;
2136 struct tevent_req **chain = NULL;
2137 size_t num_chained = 0;
2138 size_t num_responses = 0;
2139
2140 if (conn->smb1.read_braw_req != NULL) {
2141 req = conn->smb1.read_braw_req;
2142 conn->smb1.read_braw_req = NULL;
2143 state = tevent_req_data(req, struct smbXcli_req_state);
2144
2145 smbXcli_req_unset_pending(req);
2146
2147 if (state->smb1.recv_iov == NULL) {
2148 /*
2149 * For requests with more than
2150 * one response, we have to readd the
2151 * recv_iov array.
2152 */
2153 state->smb1.recv_iov = talloc_zero_array(state,
2154 struct iovec,
2155 3);
2156 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2157 return NT_STATUS_OK;
2158 }
2159 }
2160
2161 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
2162 state->smb1.recv_iov[0].iov_len = len;
2163 ZERO_STRUCT(state->smb1.recv_iov[1]);
2164 ZERO_STRUCT(state->smb1.recv_iov[2]);
2165
2166 state->smb1.recv_cmd = SMBreadBraw;
2167 state->smb1.recv_status = NT_STATUS_OK;
2168 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2169
2170 tevent_req_done(req);
2171 return NT_STATUS_OK;
2172 }
2173
2174 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
2175 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
2176 DEBUG(10, ("Got non-SMB PDU\n"));
2177 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2178 }
2179
2180 /*
2181 * If we supported multiple encrytion contexts
2182 * here we'd look up based on tid.
2183 */
2184 if (common_encryption_on(conn->smb1.trans_enc)
2185 && (CVAL(inbuf, 0) == 0)) {
2186 uint16_t enc_ctx_num;
2187
2188 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
2189 if (!NT_STATUS_IS_OK(status)) {
2190 DEBUG(10, ("get_enc_ctx_num returned %s\n",
2191 nt_errstr(status)));
2192 return status;
2193 }
2194
2195 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
2196 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
2197 enc_ctx_num,
2198 conn->smb1.trans_enc->enc_ctx_num));
2199 return NT_STATUS_INVALID_HANDLE;
2200 }
2201
2202 status = common_decrypt_buffer(conn->smb1.trans_enc,
2203 (char *)inbuf);
2204 if (!NT_STATUS_IS_OK(status)) {
2205 DEBUG(10, ("common_decrypt_buffer returned %s\n",
2206 nt_errstr(status)));
2207 return status;
2208 }
2209 inhdr = inbuf + NBT_HDR_SIZE;
2210 len = smb_len_nbt(inbuf);
2211 }
2212
2213 mid = SVAL(inhdr, HDR_MID);
2214 num_pending = talloc_array_length(conn->pending);
2215
2216 for (i=0; i<num_pending; i++) {
2217 if (mid == smb1cli_req_mid(conn->pending[i])) {
2218 break;
2219 }
2220 }
2221 if (i == num_pending) {
2222 /* Dump unexpected reply */
2223 return NT_STATUS_RETRY;
2224 }
2225
2226 oplock_break = false;
2227
2228 if (mid == 0xffff) {
2229 /*
2230 * Paranoia checks that this is really an oplock break request.
2231 */
2232 oplock_break = (len == 51); /* hdr + 8 words */
2233 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
2234 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
2235 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
2236 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
2237
2238 if (!oplock_break) {
2239 /* Dump unexpected reply */
2240 return NT_STATUS_RETRY;
2241 }
2242 }
2243
2244 req = conn->pending[i];
2245 state = tevent_req_data(req, struct smbXcli_req_state);
2246
2247 if (!oplock_break /* oplock breaks are not signed */
2248 && !smb_signing_check_pdu(conn->smb1.signing,
2249 inhdr, len, state->smb1.seqnum+1)) {
2250 DEBUG(10, ("cli_check_sign_mac failed\n"));
2251 return NT_STATUS_ACCESS_DENIED;
2252 }
2253
2254 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
2255 &iov, &num_iov);
2256 if (!NT_STATUS_IS_OK(status)) {
2257 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
2258 nt_errstr(status)));
2259 return status;
2260 }
2261
2262 cmd = CVAL(inhdr, HDR_COM);
2263 status = smb1cli_pull_raw_error(inhdr);
2264
2265 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
2266 (state->session != NULL) && state->session->disconnect_expired)
2267 {
2268 /*
2269 * this should be a short term hack
2270 * until the upper layers have implemented
2271 * re-authentication.
2272 */
2273 return status;
2274 }
2275
2276 if (state->smb1.chained_requests == NULL) {
2277 if (num_iov != 3) {
2278 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2279 }
2280
2281 smbXcli_req_unset_pending(req);
2282
2283 if (state->smb1.recv_iov == NULL) {
2284 /*
2285 * For requests with more than
2286 * one response, we have to readd the
2287 * recv_iov array.
2288 */
2289 state->smb1.recv_iov = talloc_zero_array(state,
2290 struct iovec,
2291 3);
2292 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2293 return NT_STATUS_OK;
2294 }
2295 }
2296
2297 state->smb1.recv_cmd = cmd;
2298 state->smb1.recv_status = status;
2299 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2300
2301 state->smb1.recv_iov[0] = iov[0];
2302 state->smb1.recv_iov[1] = iov[1];
2303 state->smb1.recv_iov[2] = iov[2];
2304
2305 if (talloc_array_length(conn->pending) == 0) {
2306 tevent_req_done(req);
2307 return NT_STATUS_OK;
2308 }
2309
2310 tevent_req_defer_callback(req, state->ev);
2311 tevent_req_done(req);
2312 return NT_STATUS_RETRY;
2313 }
2314
2315 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2316 num_chained = talloc_array_length(chain);
2317 num_responses = (num_iov - 1)/2;
2318
2319 if (num_responses > num_chained) {
2320 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2321 }
2322
2323 for (i=0; i<num_chained; i++) {
2324 size_t iov_idx = 1 + (i*2);
2325 struct iovec *cur = &iov[iov_idx];
2326 uint8_t *inbuf_ref;
2327
2328 req = chain[i];
2329 state = tevent_req_data(req, struct smbXcli_req_state);
2330
2331 smbXcli_req_unset_pending(req);
2332
2333 /*
2334 * as we finish multiple requests here
2335 * we need to defer the callbacks as
2336 * they could destroy our current stack state.
2337 */
2338 tevent_req_defer_callback(req, state->ev);
2339
2340 if (i >= num_responses) {
2341 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2342 continue;
2343 }
2344
2345 if (state->smb1.recv_iov == NULL) {
2346 /*
2347 * For requests with more than
2348 * one response, we have to readd the
2349 * recv_iov array.
2350 */
2351 state->smb1.recv_iov = talloc_zero_array(state,
2352 struct iovec,
2353 3);
2354 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2355 continue;
2356 }
2357 }
2358
2359 state->smb1.recv_cmd = cmd;
2360
2361 if (i == (num_responses - 1)) {
2362 /*
2363 * The last request in the chain gets the status
2364 */
2365 state->smb1.recv_status = status;
2366 } else {
2367 cmd = CVAL(cur[0].iov_base, 0);
2368 state->smb1.recv_status = NT_STATUS_OK;
2369 }
2370
2371 state->inbuf = inbuf;
2372
2373 /*
2374 * Note: here we use talloc_reference() in a way
2375 * that does not expose it to the caller.
2376 */
2377 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2378 if (tevent_req_nomem(inbuf_ref, req)) {
2379 continue;
2380 }
2381
2382 /* copy the related buffers */
2383 state->smb1.recv_iov[0] = iov[0];
2384 state->smb1.recv_iov[1] = cur[0];
2385 state->smb1.recv_iov[2] = cur[1];
2386
2387 tevent_req_done(req);
2388 }
2389
2390 return NT_STATUS_RETRY;
2391 }
2392
2393 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2394 TALLOC_CTX *mem_ctx,
2395 struct iovec **piov,
2396 uint8_t **phdr,
2397 uint8_t *pwct,
2398 uint16_t **pvwv,
2399 uint32_t *pvwv_offset,
2400 uint32_t *pnum_bytes,
2401 uint8_t **pbytes,
2402 uint32_t *pbytes_offset,
2403 uint8_t **pinbuf,
2404 const struct smb1cli_req_expected_response *expected,
2405 size_t num_expected)
2406 {
2407 struct smbXcli_req_state *state =
2408 tevent_req_data(req,
2409 struct smbXcli_req_state);
2410 NTSTATUS status = NT_STATUS_OK;
2411 struct iovec *recv_iov = NULL;
2412 uint8_t *hdr = NULL;
2413 uint8_t wct = 0;
2414 uint32_t vwv_offset = 0;
2415 uint16_t *vwv = NULL;
2416 uint32_t num_bytes = 0;
2417 uint32_t bytes_offset = 0;
2418 uint8_t *bytes = NULL;
2419 size_t i;
2420 bool found_status = false;
2421 bool found_size = false;
2422
2423 if (piov != NULL) {
2424 *piov = NULL;
2425 }
2426 if (phdr != NULL) {
2427 *phdr = 0;
2428 }
2429 if (pwct != NULL) {
2430 *pwct = 0;
2431 }
2432 if (pvwv != NULL) {
2433 *pvwv = NULL;
2434 }
2435 if (pvwv_offset != NULL) {
2436 *pvwv_offset = 0;
2437 }
2438 if (pnum_bytes != NULL) {
2439 *pnum_bytes = 0;
2440 }
2441 if (pbytes != NULL) {
2442 *pbytes = NULL;
2443 }
2444 if (pbytes_offset != NULL) {
2445 *pbytes_offset = 0;
2446 }
2447 if (pinbuf != NULL) {
2448 *pinbuf = NULL;
2449 }
2450
2451 if (state->inbuf != NULL) {
2452 recv_iov = state->smb1.recv_iov;
2453 state->smb1.recv_iov = NULL;
2454 if (state->smb1.recv_cmd != SMBreadBraw) {
2455 hdr = (uint8_t *)recv_iov[0].iov_base;
2456 wct = recv_iov[1].iov_len/2;
2457 vwv = (uint16_t *)recv_iov[1].iov_base;
2458 vwv_offset = PTR_DIFF(vwv, hdr);
2459 num_bytes = recv_iov[2].iov_len;
2460 bytes = (uint8_t *)recv_iov[2].iov_base;
2461 bytes_offset = PTR_DIFF(bytes, hdr);
2462 }
2463 }
2464
2465 if (tevent_req_is_nterror(req, &status)) {
2466 for (i=0; i < num_expected; i++) {
2467 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2468 found_status = true;
2469 break;
2470 }
2471 }
2472
2473 if (found_status) {
2474 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2475 }
2476
2477 return status;
2478 }
2479
2480 if (num_expected == 0) {
2481 found_status = true;
2482 found_size = true;
2483 }
2484
2485 status = state->smb1.recv_status;
2486
2487 for (i=0; i < num_expected; i++) {
2488 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2489 continue;
2490 }
2491
2492 found_status = true;
2493 if (expected[i].wct == 0) {
2494 found_size = true;
2495 break;
2496 }
2497
2498 if (expected[i].wct == wct) {
2499 found_size = true;
2500 break;
2501 }
2502 }
2503
2504 if (!found_status) {
2505 return status;
2506 }
2507
2508 if (!found_size) {
2509 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2510 }
2511
2512 if (piov != NULL) {
2513 *piov = talloc_move(mem_ctx, &recv_iov);
2514 }
2515
2516 if (phdr != NULL) {
2517 *phdr = hdr;
2518 }
2519 if (pwct != NULL) {
2520 *pwct = wct;
2521 }
2522 if (pvwv != NULL) {
2523 *pvwv = vwv;
2524 }
2525 if (pvwv_offset != NULL) {
2526 *pvwv_offset = vwv_offset;
2527 }
2528 if (pnum_bytes != NULL) {
2529 *pnum_bytes = num_bytes;
2530 }
2531 if (pbytes != NULL) {
2532 *pbytes = bytes;
2533 }
2534 if (pbytes_offset != NULL) {
2535 *pbytes_offset = bytes_offset;
2536 }
2537 if (pinbuf != NULL) {
2538 *pinbuf = state->inbuf;
2539 }
2540
2541 return status;
2542 }
2543
2544 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2545 {
2546 size_t wct_ofs;
2547 int i;
2548
2549 wct_ofs = HDR_WCT;
2550
2551 for (i=0; i<num_reqs; i++) {
2552 struct smbXcli_req_state *state;
2553 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2554 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2555 state->smb1.iov_count-2);
2556 wct_ofs = (wct_ofs + 3) & ~3;
2557 }
2558 return wct_ofs;
2559 }
2560
2561 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2562 {
2563 struct smbXcli_req_state *first_state =
2564 tevent_req_data(reqs[0],
2565 struct smbXcli_req_state);
2566 struct smbXcli_req_state *state;
2567 size_t wct_offset;
2568 size_t chain_padding = 0;
2569 int i, iovlen;
2570 struct iovec *iov = NULL;
2571 struct iovec *this_iov;
2572 NTSTATUS status;
2573 ssize_t nbt_len;
2574
2575 if (num_reqs == 1) {
2576 return smb1cli_req_writev_submit(reqs[0], first_state,
2577 first_state->smb1.iov,
2578 first_state->smb1.iov_count);
2579 }
2580
2581 iovlen = 0;
2582 for (i=0; i<num_reqs; i++) {
2583 if (!tevent_req_is_in_progress(reqs[i])) {
2584 return NT_STATUS_INTERNAL_ERROR;
2585 }
2586
2587 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2588
2589 if (state->smb1.iov_count < 4) {
2590 return NT_STATUS_INVALID_PARAMETER_MIX;
2591 }
2592
2593 if (i == 0) {
2594 /*
2595 * The NBT and SMB header
2596 */
2597 iovlen += 2;
2598 } else {
2599 /*
2600 * Chain padding
2601 */
2602 iovlen += 1;
2603 }
2604
2605 /*
2606 * words and bytes
2607 */
2608 iovlen += state->smb1.iov_count - 2;
2609 }
2610
2611 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2612 if (iov == NULL) {
2613 return NT_STATUS_NO_MEMORY;
2614 }
2615
2616 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2617 first_state, reqs, sizeof(*reqs) * num_reqs);
2618 if (first_state->smb1.chained_requests == NULL) {
2619 TALLOC_FREE(iov);
2620 return NT_STATUS_NO_MEMORY;
2621 }
2622
2623 wct_offset = HDR_WCT;
2624 this_iov = iov;
2625
2626 for (i=0; i<num_reqs; i++) {
2627 size_t next_padding = 0;
2628 uint16_t *vwv;
2629
2630 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2631
2632 if (i < num_reqs-1) {
2633 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2634 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2635 TALLOC_FREE(iov);
2636 TALLOC_FREE(first_state->smb1.chained_requests);
2637 return NT_STATUS_INVALID_PARAMETER_MIX;
2638 }
2639 }
2640
2641 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2642 state->smb1.iov_count-2) + 1;
2643 if ((wct_offset % 4) != 0) {
2644 next_padding = 4 - (wct_offset % 4);
2645 }
2646 wct_offset += next_padding;
2647 vwv = state->smb1.vwv;
2648
2649 if (i < num_reqs-1) {
2650 struct smbXcli_req_state *next_state =
2651 tevent_req_data(reqs[i+1],
2652 struct smbXcli_req_state);
2653 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2654 SCVAL(vwv+0, 1, 0);
2655 SSVAL(vwv+1, 0, wct_offset);
2656 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2657 /* properly end the chain */
2658 SCVAL(vwv+0, 0, 0xff);
2659 SCVAL(vwv+0, 1, 0xff);
2660 SSVAL(vwv+1, 0, 0);
2661 }
2662
2663 if (i == 0) {
2664 /*
2665 * The NBT and SMB header
2666 */
2667 this_iov[0] = state->smb1.iov[0];
2668 this_iov[1] = state->smb1.iov[1];
2669 this_iov += 2;
2670 } else {
2671 /*
2672 * This one is a bit subtle. We have to add
2673 * chain_padding bytes between the requests, and we
2674 * have to also include the wct field of the
2675 * subsequent requests. We use the subsequent header
2676 * for the padding, it contains the wct field in its
2677 * last byte.
2678 */
2679 this_iov[0].iov_len = chain_padding+1;
2680 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2681 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2682 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2683 this_iov += 1;
2684 }
2685
2686 /*
2687 * copy the words and bytes
2688 */
2689 memcpy(this_iov, state->smb1.iov+2,
2690 sizeof(struct iovec) * (state->smb1.iov_count-2));
2691 this_iov += state->smb1.iov_count - 2;
2692 chain_padding = next_padding;
2693 }
2694
2695 nbt_len = iov_buflen(&iov[1], iovlen-1);
2696 if ((nbt_len == -1) || (nbt_len > first_state->conn->smb1.max_xmit)) {
2697 TALLOC_FREE(iov);
2698 TALLOC_FREE(first_state->smb1.chained_requests);
2699 return NT_STATUS_INVALID_PARAMETER_MIX;
2700 }
2701
2702 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2703 if (!NT_STATUS_IS_OK(status)) {
2704 TALLOC_FREE(iov);
2705 TALLOC_FREE(first_state->smb1.chained_requests);
2706 return status;
2707 }
2708
2709 return NT_STATUS_OK;
2710 }
2711
2712 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2713 {
2714 return ((tevent_queue_length(conn->outgoing) != 0)
2715 || (talloc_array_length(conn->pending) != 0));
2716 }
2717
2718 bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn)
2719 {
2720 if (conn->protocol >= PROTOCOL_SMB2_02) {
2721 return (smb2cli_conn_server_capabilities(conn) & SMB2_CAP_DFS);
2722 }
2723
2724 return (smb1cli_conn_capabilities(conn) & CAP_DFS);
2725 }
2726
2727 bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
2728 {
2729 uint16_t credits = 1;
2730
2731 if (conn->smb2.cur_credits == 0) {
2732 if (max_dyn_len != NULL) {
2733 *max_dyn_len = 0;
2734 }
2735 return false;
2736 }
2737
2738 if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2739 credits = conn->smb2.cur_credits;
2740 }
2741
2742 if (max_dyn_len != NULL) {
2743 *max_dyn_len = credits * 65536;
2744 }
2745
2746 return true;
2747 }
2748
2749 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2750 {
2751 return conn->smb2.server.capabilities;
2752 }
2753
2754 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2755 {
2756 return conn->smb2.server.security_mode;
2757 }
2758
2759 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2760 {
2761 return conn->smb2.server.max_trans_size;
2762 }
2763
2764 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2765 {
2766 return conn->smb2.server.max_read_size;
2767 }
2768
2769 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2770 {
2771 return conn->smb2.server.max_write_size;
2772 }
2773
2774 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2775 uint16_t max_credits)
2776 {
2777 conn->smb2.max_credits = max_credits;
2778 }
2779
2780 uint16_t smb2cli_conn_get_cur_credits(struct smbXcli_conn *conn)
2781 {
2782 return conn->smb2.cur_credits;
2783 }
2784
2785 uint8_t smb2cli_conn_get_io_priority(struct smbXcli_conn *conn)
2786 {
2787 if (conn->protocol < PROTOCOL_SMB3_11) {
2788 return 0;
2789 }
2790
2791 return conn->smb2.io_priority;
2792 }
2793
2794 void smb2cli_conn_set_io_priority(struct smbXcli_conn *conn,
2795 uint8_t io_priority)
2796 {
2797 conn->smb2.io_priority = io_priority;
2798 }
2799
2800 uint32_t smb2cli_conn_cc_chunk_len(struct smbXcli_conn *conn)
2801 {
2802 return conn->smb2.cc_chunk_len;
2803 }
2804
2805 void smb2cli_conn_set_cc_chunk_len(struct smbXcli_conn *conn,
2806 uint32_t chunk_len)
2807 {
2808 conn->smb2.cc_chunk_len = chunk_len;
2809 }
2810
2811 uint32_t smb2cli_conn_cc_max_chunks(struct smbXcli_conn *conn)
2812 {
2813 return conn->smb2.cc_max_chunks;
2814 }
2815
2816 void smb2cli_conn_set_cc_max_chunks(struct smbXcli_conn *conn,
2817 uint32_t max_chunks)
2818 {
2819 conn->smb2.cc_max_chunks = max_chunks;
2820 }
2821
2822 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2823
2824 static bool smb2cli_req_cancel(struct tevent_req *req)
2825 {
2826 struct smbXcli_req_state *state =
2827 tevent_req_data(req,
2828 struct smbXcli_req_state);
2829 struct smbXcli_tcon *tcon = state->tcon;
2830 struct smbXcli_session *session = state->session;
2831 uint8_t *fixed = state->smb2.pad;
2832 uint16_t fixed_len = 4;
2833 struct tevent_req *subreq;
2834 struct smbXcli_req_state *substate;
2835 NTSTATUS status;
2836
2837 SSVAL(fixed, 0, 0x04);
2838 SSVAL(fixed, 2, 0);
2839
2840 subreq = smb2cli_req_create(state, state->ev,
2841 state->conn,
2842 SMB2_OP_CANCEL,
2843 0, 0, /* flags */
2844 0, /* timeout */
2845 tcon, session,
2846 fixed, fixed_len,
2847 NULL, 0, 0);
2848 if (subreq == NULL) {
2849 return false;
2850 }
2851 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2852
2853 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, state->smb2.cancel_flags);
2854 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, state->smb2.cancel_mid);
2855 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, state->smb2.cancel_aid);
2856
2857 status = smb2cli_req_compound_submit(&subreq, 1);
2858 if (!NT_STATUS_IS_OK(status)) {
2859 TALLOC_FREE(subreq);
2860 return false;
2861 }
2862
2863 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2864
2865 return true;
2866 }
2867
2868 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2869 {
2870 /* we do not care about the result */
2871 TALLOC_FREE(subreq);
2872 }
2873
2874 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2875 struct tevent_context *ev,
2876 struct smbXcli_conn *conn,
2877 uint16_t cmd,
2878 uint32_t additional_flags,
2879 uint32_t clear_flags,
2880 uint32_t timeout_msec,
2881 struct smbXcli_tcon *tcon,
2882 struct smbXcli_session *session,
2883 const uint8_t *fixed,
2884 uint16_t fixed_len,
2885 const uint8_t *dyn,
2886 uint32_t dyn_len,
2887 uint32_t max_dyn_len)
2888 {
2889 struct tevent_req *req;
2890 struct smbXcli_req_state *state;
2891 uint32_t flags = 0;
2892 uint32_t tid = 0;
2893 uint64_t uid = 0;
2894 bool use_channel_sequence = false;
2895 uint16_t channel_sequence = 0;
2896 bool use_replay_flag = false;
2897
2898 req = tevent_req_create(mem_ctx, &state,
2899 struct smbXcli_req_state);
2900 if (req == NULL) {
2901 return NULL;
2902 }
2903
2904 state->ev = ev;
2905 state->conn = conn;
2906 state->session = session;
2907 state->tcon = tcon;
2908
2909 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2910 use_channel_sequence = true;
2911 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2912 use_channel_sequence = true;
2913 }
2914
2915 if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_00) {
2916 use_replay_flag = true;
2917 }
2918
2919 if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_11) {
2920 flags |= SMB2_PRIORITY_VALUE_TO_MASK(conn->smb2.io_priority);
2921 }
2922
2923 if (session) {
2924 uid = session->smb2->session_id;
2925
2926 if (use_channel_sequence) {
2927 channel_sequence = session->smb2->channel_sequence;
2928 }
2929
2930 if (use_replay_flag && session->smb2->replay_active) {
2931 additional_flags |= SMB2_HDR_FLAG_REPLAY_OPERATION;
2932 }
2933
2934 state->smb2.should_sign = session->smb2->should_sign;
2935 state->smb2.should_encrypt = session->smb2->should_encrypt;
2936
2937 if (cmd == SMB2_OP_SESSSETUP &&
2938 session->smb2_channel.signing_key.length == 0 &&
2939 session->smb2->signing_key.length != 0)
2940 {
2941 /*
2942 * a session bind needs to be signed
2943 */
2944 state->smb2.should_sign = true;
2945 }
2946
2947 if (cmd == SMB2_OP_SESSSETUP &&
2948 session->smb2_channel.signing_key.length == 0) {
2949 state->smb2.should_encrypt = false;
2950 }
2951
2952 if (additional_flags & SMB2_HDR_FLAG_SIGNED) {
2953 if (session->smb2_channel.signing_key.length == 0) {
2954 tevent_req_nterror(req, NT_STATUS_NO_USER_SESSION_KEY);
2955 return req;
2956 }
2957
2958 additional_flags &= ~SMB2_HDR_FLAG_SIGNED;
2959 state->smb2.should_sign = true;
2960 }
2961 }
2962
2963 if (tcon) {
2964 tid = tcon->smb2.tcon_id;
2965
2966 if (tcon->smb2.should_sign) {
2967 state->smb2.should_sign = true;
2968 }
2969 if (tcon->smb2.should_encrypt) {
2970 state->smb2.should_encrypt = true;
2971 }
2972 }
2973
2974 if (state->smb2.should_encrypt) {
2975 state->smb2.should_sign = false;
2976 }
2977
2978 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2979 if (state->smb2.recv_iov == NULL) {
2980 TALLOC_FREE(req);
2981 return NULL;
2982 }
2983
2984 flags |= additional_flags;
2985 flags &= ~clear_flags;
2986
2987 state->smb2.fixed = fixed;
2988 state->smb2.fixed_len = fixed_len;
2989 state->smb2.dyn = dyn;
2990 state->smb2.dyn_len = dyn_len;
2991 state->smb2.max_dyn_len = max_dyn_len;
2992
2993 if (state->smb2.should_encrypt) {
2994 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2995 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2996 }
2997
2998 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
2999 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
3000 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
3001 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
3002 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
3003 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
3004 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
3005 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
3006
3007 switch (cmd) {
3008 case SMB2_OP_CANCEL:
3009 state->one_way = true;
3010 break;
3011 case SMB2_OP_BREAK:
3012 /*
3013 * If this is a dummy request, it will have
3014 * UINT64_MAX as message id.
3015 * If we send on break acknowledgement,
3016 * this gets overwritten later.
3017 */
3018 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
3019 break;
3020 }
3021
3022 if (timeout_msec > 0) {
3023 struct timeval endtime;
3024
3025 endtime = timeval_current_ofs_msec(timeout_msec);
3026 if (!tevent_req_set_endtime(req, ev, endtime)) {
3027 return req;
3028 }
3029 }
3030
3031 return req;
3032 }
3033
3034 void smb2cli_req_set_notify_async(struct tevent_req *req)
3035 {
3036 struct smbXcli_req_state *state =
3037 tevent_req_data(req,
3038 struct smbXcli_req_state);
3039
3040 state->smb2.notify_async = true;
3041 }
3042
3043 static void smb2cli_req_writev_done(struct tevent_req *subreq);
3044 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3045 TALLOC_CTX *tmp_mem,
3046 uint8_t *inbuf);
3047
3048 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
3049 int num_reqs)
3050 {
3051 struct smbXcli_req_state *state;
3052 struct tevent_req *subreq;
3053 struct iovec *iov;
3054 int i, num_iov, nbt_len;
3055 int tf_iov = -1;
3056 const DATA_BLOB *encryption_key = NULL;
3057 uint64_t encryption_session_id = 0;
3058 uint64_t nonce_high = UINT64_MAX;
3059 uint64_t nonce_low = UINT64_MAX;
3060
3061 /*
3062 * 1 for the nbt length, optional TRANSFORM
3063 * per request: HDR, fixed, dyn, padding
3064 * -1 because the last one does not need padding
3065 */
3066
3067 iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
3068 if (iov == NULL) {
3069 return NT_STATUS_NO_MEMORY;
3070 }
3071
3072 num_iov = 1;
3073 nbt_len = 0;
3074
3075 /*
3076 * the session of the first request that requires encryption
3077 * specifies the encryption key.
3078 */
3079 for (i=0; i<num_reqs; i++) {
3080 if (!tevent_req_is_in_progress(reqs[i])) {
3081 return NT_STATUS_INTERNAL_ERROR;
3082 }
3083
3084 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
3085
3086 if (!smbXcli_conn_is_connected(state->conn)) {
3087 return NT_STATUS_CONNECTION_DISCONNECTED;
3088 }
3089
3090 if ((state->conn->protocol != PROTOCOL_NONE) &&
3091 (state->conn->protocol < PROTOCOL_SMB2_02)) {
3092 return NT_STATUS_REVISION_MISMATCH;
3093 }
3094
3095 if (state->session == NULL) {
3096 continue;
3097 }
3098
3099 if (!state->smb2.should_encrypt) {
3100 continue;
3101 }
3102
3103 encryption_key = &state->session->smb2->encryption_key;
3104 if (encryption_key->length == 0) {
3105 return NT_STATUS_INVALID_PARAMETER_MIX;
3106 }
3107
3108 encryption_session_id = state->session->smb2->session_id;
3109
3110 state->session->smb2->nonce_low += 1;
3111 if (state->session->smb2->nonce_low == 0) {
3112 state->session->smb2->nonce_high += 1;
3113 state->session->smb2->nonce_low += 1;
3114 }
3115
3116 /*
3117 * CCM and GCM algorithms must never have their
3118 * nonce wrap, or the security of the whole
3119 * communication and the keys is destroyed.
3120 * We must drop the connection once we have
3121 * transfered too much data.
3122 *
3123 * NOTE: We assume nonces greater than 8 bytes.
3124 */
3125 if (state->session->smb2->nonce_high >=
3126 state->session->smb2->nonce_high_max)
3127 {
3128 return NT_STATUS_ENCRYPTION_FAILED;
3129 }
3130
3131 nonce_high = state->session->smb2->nonce_high_random;
3132 nonce_high += state->session->smb2->nonce_high;
3133 nonce_low = state->session->smb2->nonce_low;
3134
3135 tf_iov = num_iov;
3136 iov[num_iov].iov_base = state->smb2.transform;
3137 iov[num_iov].iov_len = sizeof(state->smb2.transform);
3138 num_iov += 1;
3139
3140 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
3141 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
3142 nonce_low);
3143 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
3144 nonce_high);
3145 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
3146 encryption_session_id);
3147
3148 nbt_len += SMB2_TF_HDR_SIZE;
3149 break;
3150 }
3151
3152 for (i=0; i<num_reqs; i++) {
3153 int hdr_iov;
3154 size_t reqlen;
3155 bool ret;
3156 uint16_t opcode;
3157 uint64_t avail;
3158 uint16_t charge;
3159 uint16_t credits;
3160 uint64_t mid;
3161 const DATA_BLOB *signing_key = NULL;
3162
3163 if (!tevent_req_is_in_progress(reqs[i])) {
3164 return NT_STATUS_INTERNAL_ERROR;
3165 }
3166
3167 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
3168
3169 if (!smbXcli_conn_is_connected(state->conn)) {
3170 return NT_STATUS_CONNECTION_DISCONNECTED;
3171 }
3172
3173 if ((state->conn->protocol != PROTOCOL_NONE) &&
3174 (state->conn->protocol < PROTOCOL_SMB2_02)) {
3175 return NT_STATUS_REVISION_MISMATCH;
3176 }
3177
3178 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3179 if (opcode == SMB2_OP_CANCEL) {
3180 goto skip_credits;
3181 }
3182
3183 avail = UINT64_MAX - state->conn->smb2.mid;
3184 if (avail < 1) {
3185 return NT_STATUS_CONNECTION_ABORTED;
3186 }
3187
3188 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
3189 uint32_t max_dyn_len = 1;
3190
3191 max_dyn_len = MAX(max_dyn_len, state->smb2.dyn_len);
3192 max_dyn_len = MAX(max_dyn_len, state->smb2.max_dyn_len);
3193
3194 charge = (max_dyn_len - 1)/ 65536 + 1;
3195 } else {
3196 charge = 1;
3197 }
3198
3199 charge = MAX(state->smb2.credit_charge, charge);
3200
3201 avail = MIN(avail, state->conn->smb2.cur_credits);
3202 if (avail < charge) {
3203 return NT_STATUS_INTERNAL_ERROR;
3204 }
3205
3206 credits = 0;
3207 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
3208 credits = state->conn->smb2.max_credits -
3209 state->conn->smb2.cur_credits;
3210 }
3211 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
3212 credits += 1;
3213 }
3214
3215 mid = state->conn->smb2.mid;
3216 state->conn->smb2.mid += charge;
3217 state->conn->smb2.cur_credits -= charge;
3218
3219 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
3220 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
3221 }
3222 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
3223 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
3224
3225 state->smb2.cancel_flags = 0;
3226 state->smb2.cancel_mid = mid;
3227 state->smb2.cancel_aid = 0;
3228
3229 skip_credits:
3230 if (state->session && encryption_key == NULL) {
3231 /*
3232 * We prefer the channel signing key if it is
3233 * already there.
3234 */
3235 if (state->smb2.should_sign) {
3236 signing_key = &state->session->smb2_channel.signing_key;
3237 }
3238
3239 /*
3240 * If it is a channel binding, we already have the main
3241 * signing key and try that one.
3242 */
3243 if (signing_key && signing_key->length == 0) {
3244 signing_key = &state->session->smb2->signing_key;
3245 }
3246
3247 /*
3248 * If we do not have any session key yet, we skip the
3249 * signing of SMB2_OP_SESSSETUP requests.
3250 */
3251 if (signing_key && signing_key->length == 0) {
3252 signing_key = NULL;
3253 }
3254 }
3255
3256 hdr_iov = num_iov;
3257 iov[num_iov].iov_base = state->smb2.hdr;
3258 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
3259 num_iov += 1;
3260
3261 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
3262 iov[num_iov].iov_len = state->smb2.fixed_len;
3263 num_iov += 1;
3264
3265 if (state->smb2.dyn != NULL) {
3266 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
3267 iov[num_iov].iov_len = state->smb2.dyn_len;
3268 num_iov += 1;
3269 }
3270
3271 reqlen = sizeof(state->smb2.hdr);
3272 reqlen += state->smb2.fixed_len;
3273 reqlen += state->smb2.dyn_len;
3274
3275 if (i < num_reqs-1) {
3276 if ((reqlen % 8) > 0) {
3277 uint8_t pad = 8 - (reqlen % 8);
3278 iov[num_iov].iov_base = state->smb2.pad;
3279 iov[num_iov].iov_len = pad;
3280 num_iov += 1;
3281 reqlen += pad;
3282 }
3283 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
3284 }
3285
3286 state->smb2.encryption_session_id = encryption_session_id;
3287
3288 if (signing_key != NULL) {
3289 NTSTATUS status;
3290
3291 status = smb2_signing_sign_pdu(*signing_key,
3292 state->session->conn->protocol,
3293 &iov[hdr_iov], num_iov - hdr_iov);
3294 if (!NT_STATUS_IS_OK(status)) {
3295 return status;
3296 }
3297 }
3298
3299 nbt_len += reqlen;
3300
3301 ret = smbXcli_req_set_pending(reqs[i]);
3302 if (!ret) {
3303 return NT_STATUS_NO_MEMORY;
3304 }
3305 }
3306
3307 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
3308 _smb_setlen_tcp(state->length_hdr, nbt_len);
3309 iov[0].iov_base = state->length_hdr;
3310 iov[0].iov_len = sizeof(state->length_hdr);
3311
3312 if (encryption_key != NULL) {
3313 NTSTATUS status;
3314 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
3315 uint8_t *buf;
3316 int vi;
3317
3318 buf = talloc_array(iov, uint8_t, buflen);
3319 if (buf == NULL) {
3320 return NT_STATUS_NO_MEMORY;
3321 }
3322
3323 /*
3324 * We copy the buffers before encrypting them,
3325 * this is at least currently needed for the
3326 * to keep state->smb2.hdr.
3327 *
3328 * Also the callers may expect there buffers
3329 * to be const.
3330 */
3331 for (vi = tf_iov + 1; vi < num_iov; vi++) {
3332 struct iovec *v = &iov[vi];
3333 const uint8_t *o = (const uint8_t *)v->iov_base;
3334
3335 memcpy(buf, o, v->iov_len);
3336 v->iov_base = (void *)buf;
3337 buf += v->iov_len;
3338 }
3339
3340 status = smb2_signing_encrypt_pdu(*encryption_key,
3341 state->conn->smb2.server.cipher,
3342 &iov[tf_iov], num_iov - tf_iov);
3343 if (!NT_STATUS_IS_OK(status)) {
3344 return status;
3345 }
3346 }
3347
3348 if (state->conn->dispatch_incoming == NULL) {
3349 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3350 }
3351
3352 subreq = writev_send(state, state->ev, state->conn->outgoing,
3353 state->conn->sock_fd, false, iov, num_iov);
3354 if (subreq == NULL) {
3355 return NT_STATUS_NO_MEMORY;
3356 }
3357 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
3358 state->write_req = subreq;
3359
3360 return NT_STATUS_OK;
3361 }
3362
3363 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
3364 {
3365 struct smbXcli_req_state *state =
3366 tevent_req_data(req,
3367 struct smbXcli_req_state);
3368
3369 state->smb2.credit_charge = charge;
3370 }
3371
3372 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
3373 struct tevent_context *ev,
3374 struct smbXcli_conn *conn,
3375 uint16_t cmd,
3376 uint32_t additional_flags,
3377 uint32_t clear_flags,
3378 uint32_t timeout_msec,
3379 struct smbXcli_tcon *tcon,
3380 struct smbXcli_session *session,
3381 const uint8_t *fixed,
3382 uint16_t fixed_len,
3383 const uint8_t *dyn,
3384 uint32_t dyn_len,
3385 uint32_t max_dyn_len)
3386 {
3387 struct tevent_req *req;
3388 NTSTATUS status;
3389
3390 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
3391 additional_flags, clear_flags,
3392 timeout_msec,
3393 tcon, session,
3394 fixed, fixed_len,
3395 dyn, dyn_len,
3396 max_dyn_len);
3397 if (req == NULL) {
3398 return NULL;
3399 }
3400 if (!tevent_req_is_in_progress(req)) {
3401 return tevent_req_post(req, ev);
3402 }
3403 status = smb2cli_req_compound_submit(&req, 1);
3404 if (tevent_req_nterror(req, status)) {
3405 return tevent_req_post(req, ev);
3406 }
3407 return req;
3408 }
3409
3410 static void smb2cli_req_writev_done(struct tevent_req *subreq)
3411 {
3412 struct tevent_req *req =
3413 tevent_req_callback_data(subreq,
3414 struct tevent_req);
3415 struct smbXcli_req_state *state =
3416 tevent_req_data(req,
3417 struct smbXcli_req_state);
3418 ssize_t nwritten;
3419 int err;
3420
3421 state->write_req = NULL;
3422
3423 nwritten = writev_recv(subreq, &err);
3424 TALLOC_FREE(subreq);
3425 if (nwritten == -1) {
3426 /* here, we need to notify all pending requests */
3427 NTSTATUS status = map_nt_error_from_unix_common(err);
3428 smbXcli_conn_disconnect(state->conn, status);
3429 return;
3430 }
3431 }
3432
3433 static struct smbXcli_session* smbXcli_session_by_uid(struct smbXcli_conn *conn,
3434 uint64_t uid)
3435 {
3436 struct smbXcli_session *s = conn->sessions;
3437
3438 for (; s; s = s->next) {
3439 if (s->smb2->session_id != uid) {
3440 continue;
3441 }
3442 break;
3443 }
3444
3445 return s;
3446 }
3447
3448 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3449 uint8_t *buf,
3450 size_t buflen,
3451 TALLOC_CTX *mem_ctx,
3452 struct iovec **piov, int *pnum_iov)
3453 {
3454 struct iovec *iov;
3455 int num_iov = 0;
3456 size_t taken = 0;
3457 uint8_t *first_hdr = buf;
3458 size_t verified_buflen = 0;
3459 uint8_t *tf = NULL;
3460 size_t tf_len = 0;
3461
3462 iov = talloc_array(mem_ctx, struct iovec, num_iov);
3463 if (iov == NULL) {
3464 return NT_STATUS_NO_MEMORY;
3465 }
3466
3467 while (taken < buflen) {
3468 size_t len = buflen - taken;
3469 uint8_t *hdr = first_hdr + taken;
3470 struct iovec *cur;
3471 size_t full_size;
3472 size_t next_command_ofs;
3473 uint16_t body_size;
3474 struct iovec *iov_tmp;
3475
3476 if (verified_buflen > taken) {
3477 len = verified_buflen - taken;
3478 } else {
3479 tf = NULL;
3480 tf_len = 0;
3481 }
3482
3483 if (len < 4) {
3484 DEBUG(10, ("%d bytes left, expected at least %d\n",
3485 (int)len, 4));
3486 goto inval;
3487 }
3488 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3489 struct smbXcli_session *s;
3490 uint64_t uid;
3491 struct iovec tf_iov[2];
3492 size_t enc_len;
3493 NTSTATUS status;
3494
3495 if (len < SMB2_TF_HDR_SIZE) {
3496 DEBUG(10, ("%d bytes left, expected at least %d\n",
3497 (int)len, SMB2_TF_HDR_SIZE));
3498 goto inval;
3499 }
3500 tf = hdr;
3501 tf_len = SMB2_TF_HDR_SIZE;
3502 taken += tf_len;
3503
3504 hdr = first_hdr + taken;
3505 enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3506 uid = BVAL(tf, SMB2_TF_SESSION_ID);
3507
3508 if (len < SMB2_TF_HDR_SIZE + enc_len) {
3509 DEBUG(10, ("%d bytes left, expected at least %d\n",
3510 (int)len,
3511 (int)(SMB2_TF_HDR_SIZE + enc_len)));
3512 goto inval;
3513 }
3514
3515 s = smbXcli_session_by_uid(conn, uid);
3516 if (s == NULL) {
3517 DEBUG(10, ("unknown session_id %llu\n",
3518 (unsigned long long)uid));
3519 goto inval;
3520 }
3521
3522 tf_iov[0].iov_base = (void *)tf;
3523 tf_iov[0].iov_len = tf_len;
3524 tf_iov[1].iov_base = (void *)hdr;
3525 tf_iov[1].iov_len = enc_len;
3526
3527 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3528 conn->smb2.server.cipher,
3529 tf_iov, 2);
3530 if (!NT_STATUS_IS_OK(status)) {
3531 TALLOC_FREE(iov);
3532 return status;
3533 }
3534
3535 verified_buflen = taken + enc_len;
3536 len = enc_len;
3537 }
3538
3539 /*
3540 * We need the header plus the body length field
3541 */
3542
3543 if (len < SMB2_HDR_BODY + 2) {
3544 DEBUG(10, ("%d bytes left, expected at least %d\n",
3545 (int)len, SMB2_HDR_BODY));
3546 goto inval;
3547 }
3548 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3549 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3550 IVAL(hdr, 0)));
3551 goto inval;
3552 }
3553 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3554 DEBUG(10, ("Got HDR len %d, expected %d\n",
3555 SVAL(hdr, 4), SMB2_HDR_BODY));
3556 goto inval;
3557 }
3558
3559 full_size = len;
3560 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3561 body_size = SVAL(hdr, SMB2_HDR_BODY);
3562
3563 if (next_command_ofs != 0) {
3564 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3565 goto inval;
3566 }
3567 if (next_command_ofs > full_size) {
3568 goto inval;
3569 }
3570 full_size = next_command_ofs;
3571 }
3572 if (body_size < 2) {
3573 goto inval;
3574 }
3575 body_size &= 0xfffe;
3576
3577 if (body_size > (full_size - SMB2_HDR_BODY)) {
3578 goto inval;
3579 }
3580
3581 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3582 num_iov + 4);
3583 if (iov_tmp == NULL) {
3584 TALLOC_FREE(iov);
3585 return NT_STATUS_NO_MEMORY;
3586 }
3587 iov = iov_tmp;
3588 cur = &iov[num_iov];
3589 num_iov += 4;
3590
3591 cur[0].iov_base = tf;
3592 cur[0].iov_len = tf_len;
3593 cur[1].iov_base = hdr;
3594 cur[1].iov_len = SMB2_HDR_BODY;
3595 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3596 cur[2].iov_len = body_size;
3597 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3598 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3599
3600 taken += full_size;
3601 }
3602
3603 *piov = iov;
3604 *pnum_iov = num_iov;
3605 return NT_STATUS_OK;
3606
3607 inval:
3608 TALLOC_FREE(iov);
3609 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3610 }
3611
3612 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3613 uint64_t mid)
3614 {
3615 size_t num_pending = talloc_array_length(conn->pending);
3616 size_t i;
3617
3618 for (i=0; i<num_pending; i++) {
3619 struct tevent_req *req = conn->pending[i];
3620 struct smbXcli_req_state *state =
3621 tevent_req_data(req,
3622 struct smbXcli_req_state);
3623
3624 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3625 return req;
3626 }
3627 }
3628 return NULL;
3629 }
3630
3631 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3632 TALLOC_CTX *tmp_mem,
3633 uint8_t *inbuf)
3634 {
3635 struct tevent_req *req;
3636 struct smbXcli_req_state *state = NULL;
3637 struct iovec *iov = NULL;
3638 int i, num_iov = 0;
3639 NTSTATUS status;
3640 bool defer = true;
3641 struct smbXcli_session *last_session = NULL;
3642 size_t inbuf_len = smb_len_tcp(inbuf);
3643
3644 status = smb2cli_inbuf_parse_compound(conn,
3645 inbuf + NBT_HDR_SIZE,
3646 inbuf_len,
3647 tmp_mem,
3648 &iov, &num_iov);
3649 if (!NT_STATUS_IS_OK(status)) {
3650 return status;
3651 }
3652
3653 for (i=0; i<num_iov; i+=4) {
3654 uint8_t *inbuf_ref = NULL;
3655 struct iovec *cur = &iov[i];
3656 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3657 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3658 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3659 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3660 uint16_t req_opcode;
3661 uint32_t req_flags;
3662 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3663 uint32_t new_credits;
3664 struct smbXcli_session *session = NULL;
3665 const DATA_BLOB *signing_key = NULL;
3666 bool was_encrypted = false;
3667
3668 new_credits = conn->smb2.cur_credits;
3669 new_credits += credits;
3670 if (new_credits > UINT16_MAX) {
3671 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3672 }
3673 conn->smb2.cur_credits += credits;
3674
3675 req = smb2cli_conn_find_pending(conn, mid);
3676 if (req == NULL) {
3677 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3678 }
3679 state = tevent_req_data(req, struct smbXcli_req_state);
3680
3681 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3682 if (opcode != req_opcode) {
3683 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3684 }
3685 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3686
3687 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3688 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3689 }
3690
3691 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3692 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3693 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3694 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3695
3696 if (state->smb2.got_async) {
3697 /* We only expect one STATUS_PENDING response */
3698 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3699 }
3700 state->smb2.got_async = true;
3701
3702 /*
3703 * async interim responses are not signed,
3704 * even if the SMB2_HDR_FLAG_SIGNED flag
3705 * is set.
3706 */
3707 state->smb2.cancel_flags = SMB2_HDR_FLAG_ASYNC;
3708 state->smb2.cancel_mid = 0;
3709 state->smb2.cancel_aid = async_id;
3710
3711 if (state->smb2.notify_async) {
3712 tevent_req_defer_callback(req, state->ev);
3713 tevent_req_notify_callback(req);
3714 }
3715 continue;
3716 }
3717
3718 session = state->session;
3719 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3720 session = last_session;
3721 }
3722 last_session = session;
3723
3724 if (state->smb2.should_sign) {
3725 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3726 return NT_STATUS_ACCESS_DENIED;
3727 }
3728 }
3729
3730 if (flags & SMB2_HDR_FLAG_SIGNED) {
3731 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3732
3733 if (session == NULL) {
3734 session = smbXcli_session_by_uid(state->conn,
3735 uid);
3736 }
3737
3738 if (session == NULL) {
3739 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3740 }
3741
3742 last_session = session;
3743 signing_key = &session->smb2_channel.signing_key;
3744 }
3745
3746 if (opcode == SMB2_OP_SESSSETUP) {
3747 /*
3748 * We prefer the channel signing key, if it is
3749 * already there.
3750 *
3751 * If we do not have a channel signing key yet,
3752 * we try the main signing key, if it is not
3753 * the final response.
3754 */
3755 if (signing_key && signing_key->length == 0 &&
3756 !NT_STATUS_IS_OK(status)) {
3757 signing_key = &session->smb2->signing_key;
3758 }
3759
3760 if (signing_key && signing_key->length == 0) {
3761 /*
3762 * If we do not have a session key to
3763 * verify the signature, we defer the
3764 * signing check to the caller.
3765 *
3766 * The caller gets NT_STATUS_OK, it
3767 * has to call
3768 * smb2cli_session_set_session_key()
3769 * or
3770 * smb2cli_session_set_channel_key()
3771 * which will check the signature
3772 * with the channel signing key.
3773 */
3774 signing_key = NULL;
3775 }
3776 }
3777
3778 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3779 const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3780 uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3781
3782 /*
3783 * If the response was encrypted in a SMB2_TRANSFORM
3784 * pdu, which belongs to the correct session,
3785 * we do not need to do signing checks
3786 *
3787 * It could be the session the response belongs to
3788 * or the session that was used to encrypt the
3789 * SMB2_TRANSFORM request.
3790 */
3791 if ((session && session->smb2->session_id == uid) ||
3792 (state->smb2.encryption_session_id == uid)) {
3793 signing_key = NULL;
3794 was_encrypted = true;
3795 }
3796 }
3797
3798 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3799 /*
3800 * if the server returns NT_STATUS_USER_SESSION_DELETED
3801 * the response is not signed and we should
3802 * propagate the NT_STATUS_USER_SESSION_DELETED
3803 * status to the caller.
3804 */
3805 state->smb2.signing_skipped = true;
3806 signing_key = NULL;
3807 }
3808
3809 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3810 /*
3811 * if the server returns
3812 * NT_STATUS_INVALID_PARAMETER
3813 * the response might not be encrypted.
3814 */
3815 if (state->smb2.should_encrypt && !was_encrypted) {
3816 state->smb2.signing_skipped = true;
3817 signing_key = NULL;
3818 }
3819 }
3820
3821 if (state->smb2.should_encrypt && !was_encrypted) {
3822 if (!state->smb2.signing_skipped) {
3823 return NT_STATUS_ACCESS_DENIED;
3824 }
3825 }
3826
3827 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3828 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3829 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3830 /*
3831 * if the server returns
3832 * NT_STATUS_NETWORK_NAME_DELETED
3833 * NT_STATUS_FILE_CLOSED
3834 * NT_STATUS_INVALID_PARAMETER
3835 * the response might not be signed
3836 * as this happens before the signing checks.
3837 *
3838 * If server echos the signature (or all zeros)
3839 * we should report the status from the server
3840 * to the caller.
3841 */
3842 if (signing_key) {
3843 int cmp;
3844
3845 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3846 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3847 16);
3848 if (cmp == 0) {
3849 state->smb2.signing_skipped = true;
3850 signing_key = NULL;
3851 }
3852 }
3853 if (signing_key) {
3854 bool zero;
3855 zero = all_zero(inhdr+SMB2_HDR_SIGNATURE, 16);
3856 if (zero) {
3857 state->smb2.signing_skipped = true;
3858 signing_key = NULL;
3859 }
3860 }
3861 }
3862
3863 if (signing_key) {
3864 status = smb2_signing_check_pdu(*signing_key,
3865 state->conn->protocol,
3866 &cur[1], 3);
3867 if (!NT_STATUS_IS_OK(status)) {
3868 /*
3869 * If the signing check fails, we disconnect
3870 * the connection.
3871 */
3872 return status;
3873 }
3874 }
3875
3876 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
3877 (session != NULL) && session->disconnect_expired)
3878 {
3879 /*
3880 * this should be a short term hack
3881 * until the upper layers have implemented
3882 * re-authentication.
3883 */
3884 return status;
3885 }
3886
3887 smbXcli_req_unset_pending(req);
3888
3889 /*
3890 * There might be more than one response
3891 * we need to defer the notifications
3892 */
3893 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3894 defer = false;
3895 }
3896
3897 if (defer) {
3898 tevent_req_defer_callback(req, state->ev);
3899 }
3900
3901 /*
3902 * Note: here we use talloc_reference() in a way
3903 * that does not expose it to the caller.
3904 */
3905 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3906 if (tevent_req_nomem(inbuf_ref, req)) {
3907 continue;
3908 }
3909
3910 /* copy the related buffers */
3911 state->smb2.recv_iov[0] = cur[1];
3912 state->smb2.recv_iov[1] = cur[2];
3913 state->smb2.recv_iov[2] = cur[3];
3914
3915 tevent_req_done(req);
3916 }
3917
3918 if (defer) {
3919 return NT_STATUS_RETRY;
3920 }
3921
3922 return NT_STATUS_OK;
3923 }
3924
3925 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3926 struct iovec **piov,
3927 const struct smb2cli_req_expected_response *expected,
3928 size_t num_expected)
3929 {
3930 struct smbXcli_req_state *state =
3931 tevent_req_data(req,
3932 struct smbXcli_req_state);
3933 NTSTATUS status;
3934 size_t body_size;
3935 bool found_status = false;
3936 bool found_size = false;
3937 size_t i;
3938
3939 if (piov != NULL) {
3940 *piov = NULL;
3941 }
3942
3943 if (tevent_req_is_in_progress(req) && state->smb2.got_async) {
3944 return STATUS_PENDING;
3945 }
3946
3947 if (tevent_req_is_nterror(req, &status)) {
3948 for (i=0; i < num_expected; i++) {
3949 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3950 found_status = true;
3951 break;
3952 }
3953 }
3954
3955 if (found_status) {
3956 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3957 }
3958
3959 return status;
3960 }
3961
3962 if (num_expected == 0) {
3963 found_status = true;
3964 found_size = true;
3965 }
3966
3967 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3968 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3969
3970 for (i=0; i < num_expected; i++) {
3971 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3972 continue;
3973 }
3974
3975 found_status = true;
3976 if (expected[i].body_size == 0) {
3977 found_size = true;
3978 break;
3979 }
3980
3981 if (expected[i].body_size == body_size) {
3982 found_size = true;
3983 break;
3984 }
3985 }
3986
3987 if (!found_status) {
3988 return status;
3989 }
3990
3991 if (state->smb2.signing_skipped) {
3992 if (num_expected > 0) {
3993 return NT_STATUS_ACCESS_DENIED;
3994 }
3995 if (!NT_STATUS_IS_ERR(status)) {
3996 return NT_STATUS_ACCESS_DENIED;
3997 }
3998 }
3999
4000 if (!found_size) {
4001 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4002 }
4003
4004 if (piov != NULL) {
4005 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
4006 }
4007
4008 return status;
4009 }
4010
4011 NTSTATUS smb2cli_req_get_sent_iov(struct tevent_req *req,
4012 struct iovec *sent_iov)
4013 {
4014 struct smbXcli_req_state *state =
4015 tevent_req_data(req,
4016 struct smbXcli_req_state);
4017
4018 if (tevent_req_is_in_progress(req)) {
4019 return STATUS_PENDING;
4020 }
4021
4022 sent_iov[0].iov_base = state->smb2.hdr;
4023 sent_iov[0].iov_len = sizeof(state->smb2.hdr);
4024
4025 sent_iov[1].iov_base = discard_const(state->smb2.fixed);
4026 sent_iov[1].iov_len = state->smb2.fixed_len;
4027
4028 if (state->smb2.dyn != NULL) {
4029 sent_iov[2].iov_base = discard_const(state->smb2.dyn);
4030 sent_iov[2].iov_len = state->smb2.dyn_len;
4031 } else {
4032 sent_iov[2].iov_base = NULL;
4033 sent_iov[2].iov_len = 0;
4034 }
4035
4036 return NT_STATUS_OK;
4037 }
4038
4039 static const struct {
4040 enum protocol_types proto;
4041 const char *smb1_name;
4042 } smb1cli_prots[] = {
4043 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
4044 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
4045 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
4046 {PROTOCOL_LANMAN1, "LANMAN1.0"},
4047 {PROTOCOL_LANMAN2, "LM1.2X002"},
4048 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
4049 {PROTOCOL_LANMAN2, "LANMAN2.1"},
4050 {PROTOCOL_LANMAN2, "Samba"},
4051 {PROTOCOL_NT1, "NT LANMAN 1.0"},
4052 {PROTOCOL_NT1, "NT LM 0.12"},
4053 {PROTOCOL_SMB2_02, "SMB 2.002"},
4054 {PROTOCOL_SMB2_10, "SMB 2.???"},
4055 };
4056
4057 static const struct {
4058 enum protocol_types proto;
4059 uint16_t smb2_dialect;
4060 } smb2cli_prots[] = {
4061 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
4062 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
4063 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
4064 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
4065 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
4066 {PROTOCOL_SMB3_02, SMB3_DIALECT_REVISION_302},
4067 {PROTOCOL_SMB3_10, SMB3_DIALECT_REVISION_310},
4068 {PROTOCOL_SMB3_11, SMB3_DIALECT_REVISION_311},
4069 };
4070
4071 struct smbXcli_negprot_state {
4072 struct smbXcli_conn *conn;
4073 struct tevent_context *ev;
4074 uint32_t timeout_msec;
4075
4076 struct {
4077 uint8_t fixed[36];
4078 } smb2;
4079 };
4080
4081 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
4082 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
4083 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
4084 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
4085 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
4086 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4087 TALLOC_CTX *frame,
4088 uint8_t *inbuf);
4089
4090 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
4091 struct tevent_context *ev,
4092 struct smbXcli_conn *conn,
4093 uint32_t timeout_msec,
4094 enum protocol_types min_protocol,
4095 enum protocol_types max_protocol,
4096 uint16_t max_credits)
4097 {
4098 struct tevent_req *req, *subreq;
4099 struct smbXcli_negprot_state *state;
4100
4101 req = tevent_req_create(mem_ctx, &state,
4102 struct smbXcli_negprot_state);
4103 if (req == NULL) {
4104 return NULL;
4105 }
4106 state->conn = conn;
4107 state->ev = ev;
4108 state->timeout_msec = timeout_msec;
4109
4110 if (min_protocol == PROTOCOL_NONE) {
4111 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
4112 return tevent_req_post(req, ev);
4113 }
4114
4115 if (max_protocol == PROTOCOL_NONE) {
4116 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
4117 return tevent_req_post(req, ev);
4118 }
4119
4120 if (min_protocol > max_protocol) {
4121 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
4122 return tevent_req_post(req, ev);
4123 }
4124
4125 conn->min_protocol = min_protocol;
4126 conn->max_protocol = max_protocol;
4127 conn->protocol = PROTOCOL_NONE;
4128
4129 if (max_protocol >= PROTOCOL_SMB2_02) {
4130 conn->smb2.max_credits = max_credits;
4131 }
4132
4133 if ((min_protocol < PROTOCOL_SMB2_02) &&
4134 (max_protocol < PROTOCOL_SMB2_02)) {
4135 /*
4136 * SMB1 only...
4137 */
4138 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4139
4140 subreq = smbXcli_negprot_smb1_subreq(state);
4141 if (tevent_req_nomem(subreq, req)) {
4142 return tevent_req_post(req, ev);
4143 }
4144 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4145 return req;
4146 }
4147
4148 if ((min_protocol >= PROTOCOL_SMB2_02) &&
4149 (max_protocol >= PROTOCOL_SMB2_02)) {
4150 /*
4151 * SMB2 only...
4152 */
4153 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4154
4155 subreq = smbXcli_negprot_smb2_subreq(state);
4156 if (tevent_req_nomem(subreq, req)) {
4157 return tevent_req_post(req, ev);
4158 }
4159 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4160 return req;
4161 }
4162
4163 /*
4164 * We send an SMB1 negprot with the SMB2 dialects
4165 * and expect a SMB1 or a SMB2 response.
4166 *
4167 * smbXcli_negprot_dispatch_incoming() will fix the
4168 * callback to match protocol of the response.
4169 */
4170 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
4171
4172 subreq = smbXcli_negprot_smb1_subreq(state);
4173 if (tevent_req_nomem(subreq, req)) {
4174 return tevent_req_post(req, ev);
4175 }
4176 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
4177 return req;
4178 }
4179
4180 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
4181 {
4182 struct tevent_req *req =
4183 tevent_req_callback_data(subreq,
4184 struct tevent_req);
4185 NTSTATUS status;
4186
4187 /*
4188 * we just want the low level error
4189 */
4190 status = tevent_req_simple_recv_ntstatus(subreq);
4191 TALLOC_FREE(subreq);
4192 if (tevent_req_nterror(req, status)) {
4193 return;
4194 }
4195
4196 /* this should never happen */
4197 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
4198 }
4199
4200 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
4201 {
4202 size_t i;
4203 DATA_BLOB bytes = data_blob_null;
4204 uint8_t flags;
4205 uint16_t flags2;
4206
4207 /* setup the protocol strings */
4208 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4209 uint8_t c = 2;
4210 bool ok;
4211
4212 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4213 continue;
4214 }
4215
4216 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4217 continue;
4218 }
4219
4220 ok = data_blob_append(state, &bytes, &c, sizeof(c));
4221 if (!ok) {
4222 return NULL;
4223 }
4224
4225 /*
4226 * We now it is already ascii and
4227 * we want NULL termination.
4228 */
4229 ok = data_blob_append(state, &bytes,
4230 smb1cli_prots[i].smb1_name,
4231 strlen(smb1cli_prots[i].smb1_name)+1);
4232 if (!ok) {
4233 return NULL;
4234 }
4235 }
4236
4237 smb1cli_req_flags(state->conn->max_protocol,
4238 state->conn->smb1.client.capabilities,
4239 SMBnegprot,
4240 0, 0, &flags,
4241 0, 0, &flags2);
4242
4243 return smb1cli_req_send(state, state->ev, state->conn,
4244 SMBnegprot,
4245 flags, ~flags,
4246 flags2, ~flags2,
4247 state->timeout_msec,
4248 0xFFFE, 0, NULL, /* pid, tid, session */
4249 0, NULL, /* wct, vwv */
4250 bytes.length, bytes.data);
4251 }
4252
4253 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
4254 {
4255 struct tevent_req *req =
4256 tevent_req_callback_data(subreq,
4257 struct tevent_req);
4258 struct smbXcli_negprot_state *state =
4259 tevent_req_data(req,
4260 struct smbXcli_negprot_state);
4261 struct smbXcli_conn *conn = state->conn;
4262 struct iovec *recv_iov = NULL;
4263 uint8_t *inhdr;
4264 uint8_t wct;
4265 uint16_t *vwv;
4266 uint32_t num_bytes;
4267 uint8_t *bytes;
4268 NTSTATUS status;
4269 uint16_t protnum;
4270 size_t i;
4271 size_t num_prots = 0;
4272 uint8_t flags;
4273 uint32_t client_capabilities = conn->smb1.client.capabilities;
4274 uint32_t both_capabilities;
4275 uint32_t server_capabilities = 0;
4276 uint32_t capabilities;
4277 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
4278 uint32_t server_max_xmit = 0;
4279 uint32_t max_xmit;
4280 uint32_t server_max_mux = 0;
4281 uint16_t server_security_mode = 0;
4282 uint32_t server_session_key = 0;
4283 bool server_readbraw = false;
4284 bool server_writebraw = false;
4285 bool server_lockread = false;
4286 bool server_writeunlock = false;
4287 struct GUID server_guid = GUID_zero();
4288 DATA_BLOB server_gss_blob = data_blob_null;
4289 uint8_t server_challenge[8];
4290 char *server_workgroup = NULL;
4291 char *server_name = NULL;
4292 int server_time_zone = 0;
4293 NTTIME server_system_time = 0;
4294 static const struct smb1cli_req_expected_response expected[] = {
4295 {
4296 .status = NT_STATUS_OK,
4297 .wct = 0x11, /* NT1 */
4298 },
4299 {
4300 .status = NT_STATUS_OK,
4301 .wct = 0x0D, /* LM */
4302 },
4303 {
4304 .status = NT_STATUS_OK,
4305 .wct = 0x01, /* CORE */
4306 }
4307 };
4308
4309 ZERO_STRUCT(server_challenge);
4310
4311 status = smb1cli_req_recv(subreq, state,
4312 &recv_iov,
4313 &inhdr,
4314 &wct,
4315 &vwv,
4316 NULL, /* pvwv_offset */
4317 &num_bytes,
4318 &bytes,
4319 NULL, /* pbytes_offset */
4320 NULL, /* pinbuf */
4321 expected, ARRAY_SIZE(expected));
4322 TALLOC_FREE(subreq);
4323 if (tevent_req_nterror(req, status)) {
4324 return;
4325 }
4326
4327 flags = CVAL(inhdr, HDR_FLG);
4328
4329 protnum = SVAL(vwv, 0);
4330
4331 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4332 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4333 continue;
4334 }
4335
4336 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4337 continue;
4338 }
4339
4340 if (protnum != num_prots) {
4341 num_prots++;
4342 continue;
4343 }
4344
4345 conn->protocol = smb1cli_prots[i].proto;
4346 break;
4347 }
4348
4349 if (conn->protocol == PROTOCOL_NONE) {
4350 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4351 return;
4352 }
4353
4354 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
4355 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
4356 "and the selected protocol level doesn't support it.\n"));
4357 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4358 return;
4359 }
4360
4361 if (flags & FLAG_SUPPORT_LOCKREAD) {
4362 server_lockread = true;
4363 server_writeunlock = true;
4364 }
4365
4366 if (conn->protocol >= PROTOCOL_NT1) {
4367 const char *client_signing = NULL;
4368 bool server_mandatory = false;
4369 bool server_allowed = false;
4370 const char *server_signing = NULL;
4371 bool ok;
4372 uint8_t key_len;
4373
4374 if (wct != 0x11) {
4375 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4376 return;
4377 }
4378
4379 /* NT protocol */
4380 server_security_mode = CVAL(vwv + 1, 0);
4381 server_max_mux = SVAL(vwv + 1, 1);
4382 server_max_xmit = IVAL(vwv + 3, 1);
4383 server_session_key = IVAL(vwv + 7, 1);
4384 server_time_zone = SVALS(vwv + 15, 1);
4385 server_time_zone *= 60;
4386 /* this time arrives in real GMT */
4387 server_system_time = BVAL(vwv + 11, 1);
4388 server_capabilities = IVAL(vwv + 9, 1);
4389
4390 key_len = CVAL(vwv + 16, 1);
4391
4392 if (server_capabilities & CAP_RAW_MODE) {
4393 server_readbraw = true;
4394 server_writebraw = true;
4395 }
4396 if (server_capabilities & CAP_LOCK_AND_READ) {
4397 server_lockread = true;
4398 }
4399
4400 if (server_capabilities & CAP_EXTENDED_SECURITY) {
4401 DATA_BLOB blob1, blob2;
4402
4403 if (num_bytes < 16) {
4404 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4405 return;
4406 }
4407
4408 blob1 = data_blob_const(bytes, 16);
4409 status = GUID_from_data_blob(&blob1, &server_guid);
4410 if (tevent_req_nterror(req, status)) {
4411 return;
4412 }
4413
4414 blob1 = data_blob_const(bytes+16, num_bytes-16);
4415 blob2 = data_blob_dup_talloc(state, blob1);
4416 if (blob1.length > 0 &&
4417 tevent_req_nomem(blob2.data, req)) {
4418 return;
4419 }
4420 server_gss_blob = blob2;
4421 } else {
4422 DATA_BLOB blob1, blob2;
4423
4424 if (num_bytes < key_len) {
4425 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4426 return;
4427 }
4428
4429 if (key_len != 0 && key_len != 8) {
4430 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4431 return;
4432 }
4433
4434 if (key_len == 8) {
4435 memcpy(server_challenge, bytes, 8);
4436 }
4437
4438 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4439 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
4440 if (blob1.length > 0) {
4441 size_t len;
4442
4443 len = utf16_len_n(blob1.data,
4444 blob1.length);
4445 blob1.length = len;
4446
4447 ok = convert_string_talloc(state,
4448 CH_UTF16LE,
4449 CH_UNIX,
4450 blob1.data,
4451 blob1.length,
4452 &server_workgroup,
4453 &len);
4454 if (!ok) {
4455 status = map_nt_error_from_unix_common(errno);
4456 tevent_req_nterror(req, status);
4457 return;
4458 }
4459 }
4460
4461 blob2.data += blob1.length;
4462 blob2.length -= blob1.length;
4463 if (blob2.length > 0) {
4464 size_t len;
4465
4466 len = utf16_len_n(blob1.data,
4467 blob1.length);
4468 blob1.length = len;
4469
4470 ok = convert_string_talloc(state,
4471 CH_UTF16LE,
4472 CH_UNIX,
4473 blob2.data,
4474 blob2.length,
4475 &server_name,
4476 &len);
4477 if (!ok) {
4478 status = map_nt_error_from_unix_common(errno);
4479 tevent_req_nterror(req, status);
4480 return;
4481 }
4482 }
4483 }
4484
4485 client_signing = "disabled";
4486 if (conn->allow_signing) {
4487 client_signing = "allowed";
4488 }
4489 if (conn->mandatory_signing) {
4490 client_signing = "required";
4491 }
4492
4493 server_signing = "not supported";
4494 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4495 server_signing = "supported";
4496 server_allowed = true;
4497 } else if (conn->mandatory_signing) {
4498 /*
4499 * We have mandatory signing as client
4500 * lets assume the server will look at our
4501 * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4502 * flag in the session setup
4503 */
4504 server_signing = "not announced";
4505 server_allowed = true;
4506 }
4507 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4508 server_signing = "required";
4509 server_mandatory = true;
4510 }
4511
4512 ok = smb_signing_set_negotiated(conn->smb1.signing,
4513 server_allowed,
4514 server_mandatory);
4515 if (!ok) {
4516 DEBUG(1,("cli_negprot: SMB signing is required, "
4517 "but client[%s] and server[%s] mismatch\n",
4518 client_signing, server_signing));
4519 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4520 return;
4521 }
4522
4523 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4524 DATA_BLOB blob1;
4525 uint8_t key_len;
4526 time_t t;
4527
4528 if (wct != 0x0D) {
4529 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4530 return;
4531 }
4532
4533 server_security_mode = SVAL(vwv + 1, 0);
4534 server_max_xmit = SVAL(vwv + 2, 0);
4535 server_max_mux = SVAL(vwv + 3, 0);
4536 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4537 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4538 server_session_key = IVAL(vwv + 6, 0);
4539 server_time_zone = SVALS(vwv + 10, 0);
4540 server_time_zone *= 60;
4541 /* this time is converted to GMT by make_unix_date */
4542 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4543 unix_to_nt_time(&server_system_time, t);
4544 key_len = SVAL(vwv + 11, 0);
4545
4546 if (num_bytes < key_len) {
4547 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4548 return;
4549 }
4550
4551 if (key_len != 0 && key_len != 8) {
4552 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4553 return;
4554 }
4555
4556 if (key_len == 8) {
4557 memcpy(server_challenge, bytes, 8);
4558 }
4559
4560 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4561 if (blob1.length > 0) {
4562 size_t len;
4563 bool ok;
4564
4565 len = utf16_len_n(blob1.data,
4566 blob1.length);
4567 blob1.length = len;
4568
4569 ok = convert_string_talloc(state,
4570 CH_DOS,
4571 CH_UNIX,
4572 blob1.data,
4573 blob1.length,
4574 &server_workgroup,
4575 &len);
4576 if (!ok) {
4577 status = map_nt_error_from_unix_common(errno);
4578 tevent_req_nterror(req, status);
4579 return;
4580 }
4581 }
4582
4583 } else {
4584 /* the old core protocol */
4585 server_time_zone = get_time_zone(time(NULL));
4586 server_max_xmit = 1024;
4587 server_max_mux = 1;
4588 }
4589
4590 if (server_max_xmit < 1024) {
4591 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4592 return;
4593 }
4594
4595 if (server_max_mux < 1) {
4596 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4597 return;
4598 }
4599
4600 /*
4601 * Now calculate the negotiated capabilities
4602 * based on the mask for:
4603 * - client only flags
4604 * - flags used in both directions
4605 * - server only flags
4606 */
4607 both_capabilities = client_capabilities & server_capabilities;
4608 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4609 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4610 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4611
4612 max_xmit = MIN(client_max_xmit, server_max_xmit);
4613
4614 conn->smb1.server.capabilities = server_capabilities;
4615 conn->smb1.capabilities = capabilities;
4616
4617 conn->smb1.server.max_xmit = server_max_xmit;
4618 conn->smb1.max_xmit = max_xmit;
4619
4620 conn->smb1.server.max_mux = server_max_mux;
4621
4622 conn->smb1.server.security_mode = server_security_mode;
4623
4624 conn->smb1.server.readbraw = server_readbraw;
4625 conn->smb1.server.writebraw = server_writebraw;
4626 conn->smb1.server.lockread = server_lockread;
4627 conn->smb1.server.writeunlock = server_writeunlock;
4628
4629 conn->smb1.server.session_key = server_session_key;
4630
4631 talloc_steal(conn, server_gss_blob.data);
4632 conn->smb1.server.gss_blob = server_gss_blob;
4633 conn->smb1.server.guid = server_guid;
4634 memcpy(conn->smb1.server.challenge, server_challenge, 8);
4635 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4636 conn->smb1.server.name = talloc_move(conn, &server_name);
4637
4638 conn->smb1.server.time_zone = server_time_zone;
4639 conn->smb1.server.system_time = server_system_time;
4640
4641 tevent_req_done(req);
4642 }
4643
4644 static size_t smbXcli_padding_helper(uint32_t offset, size_t n)
4645 {
4646 if ((offset & (n-1)) == 0) return 0;
4647 return n - (offset & (n-1));
4648 }
4649
4650 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4651 {
4652 size_t i;
4653 uint8_t *buf;
4654 uint16_t dialect_count = 0;
4655 DATA_BLOB dyn = data_blob_null;
4656
4657 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4658 bool ok;
4659 uint8_t val[2];
4660
4661 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4662 continue;
4663 }
4664
4665 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4666 continue;
4667 }
4668
4669 SSVAL(val, 0, smb2cli_prots[i].smb2_dialect);
4670
4671 ok = data_blob_append(state, &dyn, val, sizeof(val));
4672 if (!ok) {
4673 return NULL;
4674 }
4675
4676 dialect_count++;
4677 }
4678
4679 buf = state->smb2.fixed;
4680 SSVAL(buf, 0, 36);
4681 SSVAL(buf, 2, dialect_count);
4682 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4683 SSVAL(buf, 6, 0); /* Reserved */
4684 if (state->conn->max_protocol >= PROTOCOL_SMB2_22) {
4685 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4686 } else {
4687 SIVAL(buf, 8, 0); /* Capabilities */
4688 }
4689 if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
4690 NTSTATUS status;
4691 DATA_BLOB blob;
4692
4693 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4694 state, &blob);
4695 if (!NT_STATUS_IS_OK(status)) {
4696 return NULL;
4697 }
4698 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4699 } else {
4700 memset(buf+12, 0, 16); /* ClientGuid */
4701 }
4702
4703 if (state->conn->max_protocol >= PROTOCOL_SMB3_10) {
4704 NTSTATUS status;
4705 struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4706 uint32_t offset;
4707 DATA_BLOB b;
4708 uint8_t p[38];
4709 const uint8_t zeros[8] = {0, };
4710 size_t pad;
4711 bool ok;
4712
4713 SSVAL(p, 0, 1); /* HashAlgorithmCount */
4714 SSVAL(p, 2, 32); /* SaltLength */
4715 SSVAL(p, 4, SMB2_PREAUTH_INTEGRITY_SHA512);
4716 generate_random_buffer(p + 6, 32);
4717
4718 b = data_blob_const(p, 38);
4719 status = smb2_negotiate_context_add(state, &c,
4720 SMB2_PREAUTH_INTEGRITY_CAPABILITIES, b);
4721 if (!NT_STATUS_IS_OK(status)) {
4722 return NULL;
4723 }
4724
4725 SSVAL(p, 0, 2); /* ChiperCount */
4726 /*
4727 * For now we preferr CCM because our implementation
4728 * is faster than GCM, see bug #11451.
4729 */
4730 SSVAL(p, 2, SMB2_ENCRYPTION_AES128_CCM);
4731 SSVAL(p, 4, SMB2_ENCRYPTION_AES128_GCM);
4732
4733 b = data_blob_const(p, 6);
4734 status = smb2_negotiate_context_add(state, &c,
4735 SMB2_ENCRYPTION_CAPABILITIES, b);
4736 if (!NT_STATUS_IS_OK(status)) {
4737 return NULL;
4738 }
4739
4740 status = smb2_negotiate_context_push(state, &b, c);
4741 if (!NT_STATUS_IS_OK(status)) {
4742 return NULL;
4743 }
4744
4745 offset = SMB2_HDR_BODY + sizeof(state->smb2.fixed) + dyn.length;
4746 pad = smbXcli_padding_helper(offset, 8);
4747
4748 ok = data_blob_append(state, &dyn, zeros, pad);
4749 if (!ok) {
4750 return NULL;
4751 }
4752 offset += pad;
4753
4754 ok = data_blob_append(state, &dyn, b.data, b.length);
4755 if (!ok) {
4756 return NULL;
4757 }
4758
4759 SIVAL(buf, 28, offset); /* NegotiateContextOffset */
4760 SSVAL(buf, 32, c.num_contexts); /* NegotiateContextCount */
4761 SSVAL(buf, 34, 0); /* Reserved */
4762 } else {
4763 SBVAL(buf, 28, 0); /* Reserved/ClientStartTime */
4764 }
4765
4766 return smb2cli_req_send(state, state->ev,
4767 state->conn, SMB2_OP_NEGPROT,
4768 0, 0, /* flags */
4769 state->timeout_msec,
4770 NULL, NULL, /* tcon, session */
4771 state->smb2.fixed, sizeof(state->smb2.fixed),
4772 dyn.data, dyn.length,
4773 UINT16_MAX); /* max_dyn_len */
4774 }
4775
4776 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4777 {
4778 struct tevent_req *req =
4779 tevent_req_callback_data(subreq,
4780 struct tevent_req);
4781 struct smbXcli_negprot_state *state =
4782 tevent_req_data(req,
4783 struct smbXcli_negprot_state);
4784 struct smbXcli_conn *conn = state->conn;
4785 size_t security_offset, security_length;
4786 DATA_BLOB blob;
4787 NTSTATUS status;
4788 struct iovec *iov;
4789 uint8_t *body;
4790 size_t i;
4791 uint16_t dialect_revision;
4792 struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4793 uint32_t negotiate_context_offset = 0;
4794 uint16_t negotiate_context_count = 0;
4795 DATA_BLOB negotiate_context_blob = data_blob_null;
4796 size_t avail;
4797 size_t ctx_ofs;
4798 size_t needed;
4799 struct smb2_negotiate_context *preauth = NULL;
4800 uint16_t hash_count;
4801 uint16_t salt_length;
4802 uint16_t hash_selected;
4803 struct hc_sha512state sctx;
4804 struct smb2_negotiate_context *cipher = NULL;
4805 struct iovec sent_iov[3];
4806 static const struct smb2cli_req_expected_response expected[] = {
4807 {
4808 .status = NT_STATUS_OK,
4809 .body_size = 0x41
4810 }
4811 };
4812
4813 status = smb2cli_req_recv(subreq, state, &iov,
4814 expected, ARRAY_SIZE(expected));
4815 if (tevent_req_nterror(req, status)) {
4816 return;
4817 }
4818
4819 body = (uint8_t *)iov[1].iov_base;
4820
4821 dialect_revision = SVAL(body, 4);
4822
4823 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4824 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4825 continue;
4826 }
4827
4828 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4829 continue;
4830 }
4831
4832 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4833 continue;
4834 }
4835
4836 conn->protocol = smb2cli_prots[i].proto;
4837 break;
4838 }
4839
4840 if (conn->protocol == PROTOCOL_NONE) {
4841 TALLOC_FREE(subreq);
4842
4843 if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
4844 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4845 return;
4846 }
4847
4848 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4849 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4850 return;
4851 }
4852
4853 /* make sure we do not loop forever */
4854 state->conn->min_protocol = PROTOCOL_SMB2_02;
4855
4856 /*
4857 * send a SMB2 negprot, in order to negotiate
4858 * the SMB2 dialect.
4859 */
4860 subreq = smbXcli_negprot_smb2_subreq(state);
4861 if (tevent_req_nomem(subreq, req)) {
4862 return;
4863 }
4864 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4865 return;
4866 }
4867
4868 conn->smb2.server.security_mode = SVAL(body, 2);
4869 if (conn->protocol >= PROTOCOL_SMB3_10) {
4870 negotiate_context_count = SVAL(body, 6);
4871 }
4872
4873 blob = data_blob_const(body + 8, 16);
4874 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4875 if (tevent_req_nterror(req, status)) {
4876 return;
4877 }
4878
4879 conn->smb2.server.capabilities = IVAL(body, 24);
4880 conn->smb2.server.max_trans_size= IVAL(body, 28);
4881 conn->smb2.server.max_read_size = IVAL(body, 32);
4882 conn->smb2.server.max_write_size= IVAL(body, 36);
4883 conn->smb2.server.system_time = BVAL(body, 40);
4884 conn->smb2.server.start_time = BVAL(body, 48);
4885
4886 security_offset = SVAL(body, 56);
4887 security_length = SVAL(body, 58);
4888
4889 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4890 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4891 return;
4892 }
4893
4894 if (security_length > iov[2].iov_len) {
4895 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4896 return;
4897 }
4898
4899 conn->smb2.server.gss_blob = data_blob_talloc(conn,
4900 iov[2].iov_base,
4901 security_length);
4902 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4903 return;
4904 }
4905
4906 if (conn->protocol < PROTOCOL_SMB3_10) {
4907 TALLOC_FREE(subreq);
4908
4909 if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
4910 conn->smb2.server.cipher = SMB2_ENCRYPTION_AES128_CCM;
4911 }
4912 tevent_req_done(req);
4913 return;
4914 }
4915
4916 if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
4917 tevent_req_nterror(req,
4918 NT_STATUS_INVALID_NETWORK_RESPONSE);
4919 return;
4920 }
4921
4922 negotiate_context_offset = IVAL(body, 60);
4923 if (negotiate_context_offset < security_offset) {
4924 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4925 return;
4926 }
4927
4928 ctx_ofs = negotiate_context_offset - security_offset;
4929 if (ctx_ofs > iov[2].iov_len) {
4930 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4931 return;
4932 }
4933 avail = iov[2].iov_len - security_length;
4934 needed = iov[2].iov_len - ctx_ofs;
4935 if (needed > avail) {
4936 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4937 return;
4938 }
4939
4940 negotiate_context_blob.data = (uint8_t *)iov[2].iov_base;
4941 negotiate_context_blob.length = iov[2].iov_len;
4942
4943 negotiate_context_blob.data += ctx_ofs;
4944 negotiate_context_blob.length -= ctx_ofs;
4945
4946 status = smb2_negotiate_context_parse(state, negotiate_context_blob, &c);
4947 if (tevent_req_nterror(req, status)) {
4948 return;
4949 }
4950
4951 if (negotiate_context_count != c.num_contexts) {
4952 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4953 return;
4954 }
4955
4956 preauth = smb2_negotiate_context_find(&c,
4957 SMB2_PREAUTH_INTEGRITY_CAPABILITIES);
4958 if (preauth == NULL) {
4959 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4960 return;
4961 }
4962
4963 if (preauth->data.length < 6) {
4964 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4965 return;
4966 }
4967
4968 hash_count = SVAL(preauth->data.data, 0);
4969 salt_length = SVAL(preauth->data.data, 2);
4970 hash_selected = SVAL(preauth->data.data, 4);
4971
4972 if (hash_count != 1) {
4973 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4974 return;
4975 }
4976
4977 if (preauth->data.length != (6 + salt_length)) {
4978 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4979 return;
4980 }
4981
4982 if (hash_selected != SMB2_PREAUTH_INTEGRITY_SHA512) {
4983 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4984 return;
4985 }
4986
4987 cipher = smb2_negotiate_context_find(&c, SMB2_ENCRYPTION_CAPABILITIES);
4988 if (cipher != NULL) {
4989 uint16_t cipher_count;
4990
4991 if (cipher->data.length < 2) {
4992 tevent_req_nterror(req,
4993 NT_STATUS_INVALID_NETWORK_RESPONSE);
4994 return;
4995 }
4996
4997 cipher_count = SVAL(cipher->data.data, 0);
4998
4999 if (cipher_count > 1) {
5000 tevent_req_nterror(req,
5001 NT_STATUS_INVALID_NETWORK_RESPONSE);
5002 return;
5003 }
5004
5005 if (cipher->data.length != (2 + 2 * cipher_count)) {
5006 tevent_req_nterror(req,
5007 NT_STATUS_INVALID_NETWORK_RESPONSE);
5008 return;
5009 }
5010
5011 if (cipher_count == 1) {
5012 uint16_t cipher_selected;
5013
5014 cipher_selected = SVAL(cipher->data.data, 2);
5015
5016 switch (cipher_selected) {
5017 case SMB2_ENCRYPTION_AES128_GCM:
5018 case SMB2_ENCRYPTION_AES128_CCM:
5019 conn->smb2.server.cipher = cipher_selected;
5020 break;
5021 }
5022 }
5023 }
5024
5025 /* First we hash the request */
5026 smb2cli_req_get_sent_iov(subreq, sent_iov);
5027 samba_SHA512_Init(&sctx);
5028 samba_SHA512_Update(&sctx, conn->smb2.preauth_sha512,
5029 sizeof(conn->smb2.preauth_sha512));
5030 for (i = 0; i < 3; i++) {
5031 samba_SHA512_Update(&sctx, sent_iov[i].iov_base, sent_iov[i].iov_len);
5032 }
5033 samba_SHA512_Final(conn->smb2.preauth_sha512, &sctx);
5034 TALLOC_FREE(subreq);
5035
5036 /* And now we hash the response */
5037 samba_SHA512_Init(&sctx);
5038 samba_SHA512_Update(&sctx, conn->smb2.preauth_sha512,
5039 sizeof(conn->smb2.preauth_sha512));
5040 for (i = 0; i < 3; i++) {
5041 samba_SHA512_Update(&sctx, iov[i].iov_base, iov[i].iov_len);
5042 }
5043 samba_SHA512_Final(conn->smb2.preauth_sha512, &sctx);
5044
5045 tevent_req_done(req);
5046 }
5047
5048 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
5049 TALLOC_CTX *tmp_mem,
5050 uint8_t *inbuf)
5051 {
5052 size_t num_pending = talloc_array_length(conn->pending);
5053 struct tevent_req *subreq;
5054 struct smbXcli_req_state *substate;
5055 struct tevent_req *req;
5056 uint32_t protocol_magic;
5057 size_t inbuf_len = smb_len_nbt(inbuf);
5058
5059 if (num_pending != 1) {
5060 return NT_STATUS_INTERNAL_ERROR;
5061 }
5062
5063 if (inbuf_len < 4) {
5064 return NT_STATUS_INVALID_NETWORK_RESPONSE;
5065 }
5066
5067 subreq = conn->pending[0];
5068 substate = tevent_req_data(subreq, struct smbXcli_req_state);
5069 req = tevent_req_callback_data(subreq, struct tevent_req);
5070
5071 protocol_magic = IVAL(inbuf, 4);
5072
5073 switch (protocol_magic) {
5074 case SMB_MAGIC:
5075 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
5076 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
5077 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
5078
5079 case SMB2_MAGIC:
5080 if (substate->smb2.recv_iov == NULL) {
5081 /*
5082 * For the SMB1 negprot we have move it.
5083 */
5084 substate->smb2.recv_iov = substate->smb1.recv_iov;
5085 substate->smb1.recv_iov = NULL;
5086 }
5087
5088 /*
5089 * we got an SMB2 answer, which consumed sequence number 0
5090 * so we need to use 1 as the next one.
5091 *
5092 * we also need to set the current credits to 0
5093 * as we consumed the initial one. The SMB2 answer
5094 * hopefully grant us a new credit.
5095 */
5096 conn->smb2.mid = 1;
5097 conn->smb2.cur_credits = 0;
5098 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
5099 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
5100 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
5101 }
5102
5103 DEBUG(10, ("Got non-SMB PDU\n"));
5104 return NT_STATUS_INVALID_NETWORK_RESPONSE;
5105 }
5106
5107 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
5108 {
5109 return tevent_req_simple_recv_ntstatus(req);
5110 }
5111
5112 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
5113 uint32_t timeout_msec,
5114 enum protocol_types min_protocol,
5115 enum protocol_types max_protocol)
5116 {
5117 TALLOC_CTX *frame = talloc_stackframe();
5118 struct tevent_context *ev;
5119 struct tevent_req *req;
5120 NTSTATUS status = NT_STATUS_NO_MEMORY;
5121 bool ok;
5122
5123 if (smbXcli_conn_has_async_calls(conn)) {
5124 /*
5125 * Can't use sync call while an async call is in flight
5126 */
5127 status = NT_STATUS_INVALID_PARAMETER_MIX;
5128 goto fail;
5129 }
5130 ev = samba_tevent_context_init(frame);
5131 if (ev == NULL) {
5132 goto fail;
5133 }
5134 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
5135 min_protocol, max_protocol,
5136 WINDOWS_CLIENT_PURE_SMB2_NEGPROT_INITIAL_CREDIT_ASK);
5137 if (req == NULL) {
5138 goto fail;
5139 }
5140 ok = tevent_req_poll_ntstatus(req, ev, &status);
5141 if (!ok) {
5142 goto fail;
5143 }
5144 status = smbXcli_negprot_recv(req);
5145 fail:
5146 TALLOC_FREE(frame);
5147 return status;
5148 }
5149
5150 struct smb2cli_validate_negotiate_info_state {
5151 struct smbXcli_conn *conn;
5152 DATA_BLOB in_input_buffer;
5153 DATA_BLOB in_output_buffer;
5154 DATA_BLOB out_input_buffer;
5155 DATA_BLOB out_output_buffer;
5156 uint16_t dialect;
5157 };
5158
5159 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq);
5160
5161 struct tevent_req *smb2cli_validate_negotiate_info_send(TALLOC_CTX *mem_ctx,
5162 struct tevent_context *ev,
5163 struct smbXcli_conn *conn,
5164 uint32_t timeout_msec,
5165 struct smbXcli_session *session,
5166 struct smbXcli_tcon *tcon)
5167 {
5168 struct tevent_req *req;
5169 struct smb2cli_validate_negotiate_info_state *state;
5170 uint8_t *buf;
5171 uint16_t dialect_count = 0;
5172 struct tevent_req *subreq;
5173 bool _save_should_sign;
5174 size_t i;
5175
5176 req = tevent_req_create(mem_ctx, &state,
5177 struct smb2cli_validate_negotiate_info_state);
5178 if (req == NULL) {
5179 return NULL;
5180 }
5181 state->conn = conn;
5182
5183 state->in_input_buffer = data_blob_talloc_zero(state,
5184 4 + 16 + 1 + 1 + 2);
5185 if (tevent_req_nomem(state->in_input_buffer.data, req)) {
5186 return tevent_req_post(req, ev);
5187 }
5188 buf = state->in_input_buffer.data;
5189
5190 if (state->conn->max_protocol >= PROTOCOL_SMB2_22) {
5191 SIVAL(buf, 0, conn->smb2.client.capabilities);
5192 } else {
5193 SIVAL(buf, 0, 0); /* Capabilities */
5194 }
5195 if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
5196 NTSTATUS status;
5197 DATA_BLOB blob;
5198
5199 status = GUID_to_ndr_blob(&conn->smb2.client.guid,
5200 state, &blob);
5201 if (!NT_STATUS_IS_OK(status)) {
5202 return NULL;
5203 }
5204 memcpy(buf+4, blob.data, 16); /* ClientGuid */
5205 } else {
5206 memset(buf+4, 0, 16); /* ClientGuid */
5207 }
5208 if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
5209 SCVAL(buf, 20, conn->smb2.client.security_mode);
5210 } else {
5211 SCVAL(buf, 20, 0);
5212 }
5213 SCVAL(buf, 21, 0); /* reserved */
5214
5215 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
5216 bool ok;
5217 size_t ofs;
5218
5219 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
5220 continue;
5221 }
5222
5223 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
5224 continue;
5225 }
5226
5227 if (smb2cli_prots[i].proto == state->conn->protocol) {
5228 state->dialect = smb2cli_prots[i].smb2_dialect;
5229 }
5230
5231 ofs = state->in_input_buffer.length;
5232 ok = data_blob_realloc(state, &state->in_input_buffer,
5233 ofs + 2);
5234 if (!ok) {
5235 tevent_req_oom(req);
5236 return tevent_req_post(req, ev);
5237 }
5238
5239 buf = state->in_input_buffer.data;
5240 SSVAL(buf, ofs, smb2cli_prots[i].smb2_dialect);
5241
5242 dialect_count++;
5243 }
5244 buf = state->in_input_buffer.data;
5245 SSVAL(buf, 22, dialect_count);
5246
5247 _save_should_sign = smb2cli_tcon_is_signing_on(tcon);
5248 smb2cli_tcon_should_sign(tcon, true);
5249 subreq = smb2cli_ioctl_send(state, ev, conn,
5250 timeout_msec, session, tcon,
5251 UINT64_MAX, /* in_fid_persistent */
5252 UINT64_MAX, /* in_fid_volatile */
5253 FSCTL_VALIDATE_NEGOTIATE_INFO,
5254 0, /* in_max_input_length */
5255 &state->in_input_buffer,
5256 24, /* in_max_output_length */
5257 &state->in_output_buffer,
5258 SMB2_IOCTL_FLAG_IS_FSCTL);
5259 smb2cli_tcon_should_sign(tcon, _save_should_sign);
5260 if (tevent_req_nomem(subreq, req)) {
5261 return tevent_req_post(req, ev);
5262 }
5263 tevent_req_set_callback(subreq,
5264 smb2cli_validate_negotiate_info_done,
5265 req);
5266
5267 return req;
5268 }
5269
5270 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq)
5271 {
5272 struct tevent_req *req =
5273 tevent_req_callback_data(subreq,
5274 struct tevent_req);
5275 struct smb2cli_validate_negotiate_info_state *state =
5276 tevent_req_data(req,
5277 struct smb2cli_validate_negotiate_info_state);
5278 NTSTATUS status;
5279 const uint8_t *buf;
5280 uint32_t capabilities;
5281 DATA_BLOB guid_blob;
5282 struct GUID server_guid;
5283 uint16_t security_mode;
5284 uint16_t dialect;
5285
5286 status = smb2cli_ioctl_recv(subreq, state,
5287 &state->out_input_buffer,
5288 &state->out_output_buffer);
5289 TALLOC_FREE(subreq);
5290 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED)) {
5291 /*
5292 * The response was signed, but not supported
5293 *
5294 * Older Windows and Samba releases return
5295 * NT_STATUS_FILE_CLOSED.
5296 */
5297 tevent_req_done(req);
5298 return;
5299 }
5300 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_DEVICE_REQUEST)) {
5301 /*
5302 * The response was signed, but not supported
5303 *
5304 * This is returned by the NTVFS based Samba 4.x file server
5305 * for file shares.
5306 */
5307 tevent_req_done(req);
5308 return;
5309 }
5310 if (NT_STATUS_EQUAL(status, NT_STATUS_FS_DRIVER_REQUIRED)) {
5311 /*
5312 * The response was signed, but not supported
5313 *
5314 * This is returned by the NTVFS based Samba 4.x file server
5315 * for ipc shares.
5316 */
5317 tevent_req_done(req);
5318 return;
5319 }
5320 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
5321 /*
5322 * The response was signed, but not supported
5323 *
5324 * This might be returned by older Windows versions or by
5325 * NetApp SMB server implementations.
5326 *
5327 * See
5328 *
5329 * https://blogs.msdn.microsoft.com/openspecification/2012/06/28/smb3-secure-dialect-negotiation/
5330 *
5331 */
5332 tevent_req_done(req);
5333 return;
5334 }
5335 if (tevent_req_nterror(req, status)) {
5336 return;
5337 }
5338
5339 if (state->out_output_buffer.length != 24) {
5340 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5341 return;
5342 }
5343
5344 buf = state->out_output_buffer.data;
5345
5346 capabilities = IVAL(buf, 0);
5347 guid_blob = data_blob_const(buf + 4, 16);
5348 status = GUID_from_data_blob(&guid_blob, &server_guid);
5349 if (tevent_req_nterror(req, status)) {
5350 return;
5351 }
5352 security_mode = CVAL(buf, 20);
5353 dialect = SVAL(buf, 22);
5354
5355 if (capabilities != state->conn->smb2.server.capabilities) {
5356 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5357 return;
5358 }
5359
5360 if (!GUID_equal(&server_guid, &state->conn->smb2.server.guid)) {
5361 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5362 return;
5363 }
5364
5365 if (security_mode != state->conn->smb2.server.security_mode) {
5366 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5367 return;
5368 }
5369
5370 if (dialect != state->dialect) {
5371 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5372 return;
5373 }
5374
5375 tevent_req_done(req);
5376 }
5377
5378 NTSTATUS smb2cli_validate_negotiate_info_recv(struct tevent_req *req)
5379 {
5380 return tevent_req_simple_recv_ntstatus(req);
5381 }
5382
5383 static int smbXcli_session_destructor(struct smbXcli_session *session)
5384 {
5385 if (session->conn == NULL) {
5386 return 0;
5387 }
5388
5389 DLIST_REMOVE(session->conn->sessions, session);
5390 return 0;
5391 }
5392
5393 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
5394 struct smbXcli_conn *conn)
5395 {
5396 struct smbXcli_session *session;
5397
5398 session = talloc_zero(mem_ctx, struct smbXcli_session);
5399 if (session == NULL) {
5400 return NULL;
5401 }
5402 session->smb2 = talloc_zero(session, struct smb2cli_session);
5403 if (session->smb2 == NULL) {
5404 talloc_free(session);
5405 return NULL;
5406 }
5407 talloc_set_destructor(session, smbXcli_session_destructor);
5408
5409 DLIST_ADD_END(conn->sessions, session);
5410 session->conn = conn;
5411
5412 memcpy(session->smb2_channel.preauth_sha512,
5413 conn->smb2.preauth_sha512,
5414 sizeof(session->smb2_channel.preauth_sha512));
5415
5416 return session;
5417 }
5418
5419 struct smbXcli_session *smbXcli_session_copy(TALLOC_CTX *mem_ctx,
5420 struct smbXcli_session *src)
5421 {
5422 struct smbXcli_session *session;
5423
5424 session = talloc_zero(mem_ctx, struct smbXcli_session);
5425 if (session == NULL) {
5426 return NULL;
5427 }
5428 session->smb2 = talloc_zero(session, struct smb2cli_session);
5429 if (session->smb2 == NULL) {
5430 talloc_free(session);
5431 return NULL;
5432 }
5433
5434 session->conn = src->conn;
5435 *session->smb2 = *src->smb2;
5436 session->smb2_channel = src->smb2_channel;
5437 session->disconnect_expired = src->disconnect_expired;
5438
5439 DLIST_ADD_END(src->conn->sessions, session);
5440 talloc_set_destructor(session, smbXcli_session_destructor);
5441
5442 return session;
5443 }
5444
5445 bool smbXcli_session_is_guest(struct smbXcli_session *session)
5446 {
5447 if (session == NULL) {
5448 return false;
5449 }
5450
5451 if (session->conn == NULL) {
5452 return false;
5453 }
5454
5455 if (session->conn->mandatory_signing) {
5456 return false;
5457 }
5458
5459 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5460 if (session->smb2->session_flags & SMB2_SESSION_FLAG_IS_GUEST) {
5461 return true;
5462 }
5463 return false;
5464 }
5465
5466 if (session->smb1.action & SMB_SETUP_GUEST) {
5467 return true;
5468 }
5469
5470 return false;
5471 }
5472
5473 bool smbXcli_session_is_authenticated(struct smbXcli_session *session)
5474 {
5475 const DATA_BLOB *application_key;
5476
5477 if (session == NULL) {
5478 return false;
5479 }
5480
5481 if (session->conn == NULL) {
5482 return false;
5483 }
5484
5485 /*
5486 * If we have an application key we had a session key negotiated
5487 * at auth time.
5488 */
5489 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5490 application_key = &session->smb2->application_key;
5491 } else {
5492 application_key = &session->smb1.application_key;
5493 }
5494
5495 if (application_key->length == 0) {
5496 return false;
5497 }
5498
5499 return true;
5500 }
5501
5502 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
5503 TALLOC_CTX *mem_ctx,
5504 DATA_BLOB *key)
5505 {
5506 const DATA_BLOB *application_key;
5507
5508 *key = data_blob_null;
5509
5510 if (session->conn == NULL) {
5511 return NT_STATUS_NO_USER_SESSION_KEY;
5512 }
5513
5514 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5515 application_key = &session->smb2->application_key;
5516 } else {
5517 application_key = &session->smb1.application_key;
5518 }
5519
5520 if (application_key->length == 0) {
5521 return NT_STATUS_NO_USER_SESSION_KEY;
5522 }
5523
5524 *key = data_blob_dup_talloc(mem_ctx, *application_key);
5525 if (key->data == NULL) {
5526 return NT_STATUS_NO_MEMORY;
5527 }
5528
5529 return NT_STATUS_OK;
5530 }
5531
5532 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
5533 {
5534 session->disconnect_expired = true;
5535 }
5536
5537 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
5538 {
5539 return session->smb1.session_id;
5540 }
5541
5542 void smb1cli_session_set_id(struct smbXcli_session *session,
5543 uint16_t session_id)
5544 {
5545 session->smb1.session_id = session_id;
5546 }
5547
5548 void smb1cli_session_set_action(struct smbXcli_session *session,
5549 uint16_t action)
5550 {
5551 session->smb1.action = action;
5552 }
5553
5554 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
5555 const DATA_BLOB _session_key)
5556 {
5557 struct smbXcli_conn *conn = session->conn;
5558 uint8_t session_key[16];
5559
5560 if (conn == NULL) {
5561 return NT_STATUS_INVALID_PARAMETER_MIX;
5562 }
5563
5564 if (session->smb1.application_key.length != 0) {
5565 /*
5566 * TODO: do not allow this...
5567 *
5568 * return NT_STATUS_INVALID_PARAMETER_MIX;
5569 */
5570 data_blob_clear_free(&session->smb1.application_key);
5571 session->smb1.protected_key = false;
5572 }
5573
5574 if (_session_key.length == 0) {
5575 return NT_STATUS_OK;
5576 }
5577
5578 ZERO_STRUCT(session_key);
5579 memcpy(session_key, _session_key.data,
5580 MIN(_session_key.length, sizeof(session_key)));
5581
5582 session->smb1.application_key = data_blob_talloc(session,
5583 session_key,
5584 sizeof(session_key));
5585 ZERO_STRUCT(session_key);
5586 if (session->smb1.application_key.data == NULL) {
5587 return NT_STATUS_NO_MEMORY;
5588 }
5589
5590 session->smb1.protected_key = false;
5591
5592 return NT_STATUS_OK;
5593 }
5594
5595 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
5596 {
5597 if (session->smb1.protected_key) {
5598 /* already protected */
5599 return NT_STATUS_OK;
5600 }
5601
5602 if (session->smb1.application_key.length != 16) {
5603 return NT_STATUS_INVALID_PARAMETER_MIX;
5604 }
5605
5606 smb_key_derivation(session->smb1.application_key.data,
5607 session->smb1.application_key.length,
5608 session->smb1.application_key.data);
5609
5610 session->smb1.protected_key = true;
5611
5612 return NT_STATUS_OK;
5613 }
5614
5615 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
5616 {
5617 struct smbXcli_conn *conn = session->conn;
5618 uint8_t security_mode = 0;
5619
5620 if (conn == NULL) {
5621 return security_mode;
5622 }
5623
5624 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
5625 if (conn->mandatory_signing) {
5626 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
5627 }
5628 if (session->smb2->should_sign) {
5629 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
5630 }
5631
5632 return security_mode;
5633 }
5634
5635 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
5636 {
5637 return session->smb2->session_id;
5638 }
5639
5640 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
5641 {
5642 return session->smb2->session_flags;
5643 }
5644
5645 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
5646 uint64_t session_id,
5647 uint16_t session_flags)
5648 {
5649 session->smb2->session_id = session_id;
5650 session->smb2->session_flags = session_flags;
5651 }
5652
5653 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
5654 {
5655 session->smb2->channel_sequence += 1;
5656 }
5657
5658 uint16_t smb2cli_session_reset_channel_sequence(struct smbXcli_session *session,
5659 uint16_t channel_sequence)
5660 {
5661 uint16_t prev_cs;
5662
5663 prev_cs = session->smb2->channel_sequence;
5664 session->smb2->channel_sequence = channel_sequence;
5665
5666 return prev_cs;
5667 }
5668
5669 uint16_t smb2cli_session_current_channel_sequence(struct smbXcli_session *session)
5670 {
5671 return session->smb2->channel_sequence;
5672 }
5673
5674 void smb2cli_session_start_replay(struct smbXcli_session *session)
5675 {
5676 session->smb2->replay_active = true;
5677 }
5678
5679 void smb2cli_session_stop_replay(struct smbXcli_session *session)
5680 {
5681 session->smb2->replay_active = false;
5682 }
5683
5684 NTSTATUS smb2cli_session_update_preauth(struct smbXcli_session *session,
5685 const struct iovec *iov)
5686 {
5687 struct hc_sha512state sctx;
5688 size_t i;
5689
5690 if (session->conn == NULL) {
5691 return NT_STATUS_INTERNAL_ERROR;
5692 }
5693
5694 if (session->conn->protocol < PROTOCOL_SMB3_10) {
5695 return NT_STATUS_OK;
5696 }
5697
5698 if (session->smb2_channel.signing_key.length != 0) {
5699 return NT_STATUS_OK;
5700 }
5701
5702 samba_SHA512_Init(&sctx);
5703 samba_SHA512_Update(&sctx, session->smb2_channel.preauth_sha512,
5704 sizeof(session->smb2_channel.preauth_sha512));
5705 for (i = 0; i < 3; i++) {
5706 samba_SHA512_Update(&sctx, iov[i].iov_base, iov[i].iov_len);
5707 }
5708 samba_SHA512_Final(session->smb2_channel.preauth_sha512, &sctx);
5709
5710 return NT_STATUS_OK;
5711 }
5712
5713 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
5714 const DATA_BLOB _session_key,
5715 const struct iovec *recv_iov)
5716 {
5717 struct smbXcli_conn *conn = session->conn;
5718 uint16_t no_sign_flags = 0;
5719 uint8_t session_key[16];
5720 bool check_signature = true;
5721 uint32_t hdr_flags;
5722 NTSTATUS status;
5723 struct _derivation {
5724 DATA_BLOB label;
5725 DATA_BLOB context;
5726 };
5727 struct {
5728 struct _derivation signing;
5729 struct _derivation encryption;
5730 struct _derivation decryption;
5731 struct _derivation application;
5732 } derivation = { };
5733 size_t nonce_size = 0;
5734
5735 if (conn == NULL) {
5736 return NT_STATUS_INVALID_PARAMETER_MIX;
5737 }
5738
5739 if (recv_iov[0].iov_len != SMB2_HDR_BODY) {
5740 return NT_STATUS_INVALID_PARAMETER_MIX;
5741 }
5742
5743 if (!conn->mandatory_signing) {
5744 /*
5745 * only allow guest sessions without
5746 * mandatory signing.
5747 *
5748 * If we try an authentication with username != ""
5749 * and the server let us in without verifying the
5750 * password we don't have a negotiated session key
5751 * for signing.
5752 */
5753 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST;
5754 }
5755
5756 if (session->smb2->session_flags & no_sign_flags) {
5757 session->smb2->should_sign = false;
5758 return NT_STATUS_OK;
5759 }
5760
5761 if (session->smb2->signing_key.length != 0) {
5762 return NT_STATUS_INVALID_PARAMETER_MIX;
5763 }
5764
5765 if (conn->protocol >= PROTOCOL_SMB3_10) {
5766 struct _derivation *d;
5767 DATA_BLOB p;
5768
5769 p = data_blob_const(session->smb2_channel.preauth_sha512,
5770 sizeof(session->smb2_channel.preauth_sha512));
5771
5772 d = &derivation.signing;
5773 d->label = data_blob_string_const_null("SMBSigningKey");
5774 d->context = p;
5775
5776 d = &derivation.encryption;
5777 d->label = data_blob_string_const_null("SMBC2SCipherKey");
5778 d->context = p;
5779
5780 d = &derivation.decryption;
5781 d->label = data_blob_string_const_null("SMBS2CCipherKey");
5782 d->context = p;
5783
5784 d = &derivation.application;
5785 d->label = data_blob_string_const_null("SMBAppKey");
5786 d->context = p;
5787
5788 } else if (conn->protocol >= PROTOCOL_SMB2_24) {
5789 struct _derivation *d;
5790
5791 d = &derivation.signing;
5792 d->label = data_blob_string_const_null("SMB2AESCMAC");
5793 d->context = data_blob_string_const_null("SmbSign");
5794
5795 d = &derivation.encryption;
5796 d->label = data_blob_string_const_null("SMB2AESCCM");
5797 d->context = data_blob_string_const_null("ServerIn ");
5798
5799 d = &derivation.decryption;
5800 d->label = data_blob_string_const_null("SMB2AESCCM");
5801 d->context = data_blob_string_const_null("ServerOut");
5802
5803 d = &derivation.application;
5804 d->label = data_blob_string_const_null("SMB2APP");
5805 d->context = data_blob_string_const_null("SmbRpc");
5806 }
5807
5808 ZERO_STRUCT(session_key);
5809 memcpy(session_key, _session_key.data,
5810 MIN(_session_key.length, sizeof(session_key)));
5811
5812 session->smb2->signing_key = data_blob_talloc(session,
5813 session_key,
5814 sizeof(session_key));
5815 if (session->smb2->signing_key.data == NULL) {
5816 ZERO_STRUCT(session_key);
5817 return NT_STATUS_NO_MEMORY;
5818 }
5819
5820 if (conn->protocol >= PROTOCOL_SMB2_24) {
5821 struct _derivation *d = &derivation.signing;
5822
5823 smb2_key_derivation(session_key, sizeof(session_key),
5824 d->label.data, d->label.length,
5825 d->context.data, d->context.length,
5826 session->smb2->signing_key.data);
5827 }
5828
5829 session->smb2->encryption_key = data_blob_dup_talloc(session,
5830 session->smb2->signing_key);
5831 if (session->smb2->encryption_key.data == NULL) {
5832 ZERO_STRUCT(session_key);
5833 return NT_STATUS_NO_MEMORY;
5834 }
5835
5836 if (conn->protocol >= PROTOCOL_SMB2_24) {
5837 struct _derivation *d = &derivation.encryption;
5838
5839 smb2_key_derivation(session_key, sizeof(session_key),
5840 d->label.data, d->label.length,
5841 d->context.data, d->context.length,
5842 session->smb2->encryption_key.data);
5843 }
5844
5845 session->smb2->decryption_key = data_blob_dup_talloc(session,
5846 session->smb2->signing_key);
5847 if (session->smb2->decryption_key.data == NULL) {
5848 ZERO_STRUCT(session_key);
5849 return NT_STATUS_NO_MEMORY;
5850 }
5851
5852 if (conn->protocol >= PROTOCOL_SMB2_24) {
5853 struct _derivation *d = &derivation.decryption;
5854
5855 smb2_key_derivation(session_key, sizeof(session_key),
5856 d->label.data, d->label.length,
5857 d->context.data, d->context.length,
5858 session->smb2->decryption_key.data);
5859 }
5860
5861 session->smb2->application_key = data_blob_dup_talloc(session,
5862 session->smb2->signing_key);
5863 if (session->smb2->application_key.data == NULL) {
5864 ZERO_STRUCT(session_key);
5865 return NT_STATUS_NO_MEMORY;
5866 }
5867
5868 if (conn->protocol >= PROTOCOL_SMB2_24) {
5869 struct _derivation *d = &derivation.application;
5870
5871 smb2_key_derivation(session_key, sizeof(session_key),
5872 d->label.data, d->label.length,
5873 d->context.data, d->context.length,
5874 session->smb2->application_key.data);
5875 }
5876 ZERO_STRUCT(session_key);
5877
5878 session->smb2_channel.signing_key = data_blob_dup_talloc(session,
5879 session->smb2->signing_key);
5880 if (session->smb2_channel.signing_key.data == NULL) {
5881 return NT_STATUS_NO_MEMORY;
5882 }
5883
5884 check_signature = conn->mandatory_signing;
5885
5886 hdr_flags = IVAL(recv_iov[0].iov_base, SMB2_HDR_FLAGS);
5887 if (hdr_flags & SMB2_HDR_FLAG_SIGNED) {
5888 /*
5889 * Sadly some vendors don't sign the
5890 * final SMB2 session setup response
5891 *
5892 * At least Windows and Samba are always doing this
5893 * if there's a session key available.
5894 *
5895 * We only check the signature if it's mandatory
5896 * or SMB2_HDR_FLAG_SIGNED is provided.
5897 */
5898 check_signature = true;
5899 }
5900
5901 if (conn->protocol >= PROTOCOL_SMB3_10) {
5902 check_signature = true;
5903 }
5904
5905 if (check_signature) {
5906 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
5907 session->conn->protocol,
5908 recv_iov, 3);
5909 if (!NT_STATUS_IS_OK(status)) {
5910 return status;
5911 }
5912 }
5913
5914 session->smb2->should_sign = false;
5915 session->smb2->should_encrypt = false;
5916
5917 if (conn->desire_signing) {
5918 session->smb2->should_sign = true;
5919 }
5920
5921 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
5922 session->smb2->should_sign = true;
5923 }
5924
5925 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
5926 session->smb2->should_encrypt = true;
5927 }
5928
5929 if (conn->protocol < PROTOCOL_SMB2_24) {
5930 session->smb2->should_encrypt = false;
5931 }
5932
5933 if (conn->smb2.server.cipher == 0) {
5934 session->smb2->should_encrypt = false;
5935 }
5936
5937 /*
5938 * CCM and GCM algorithms must never have their
5939 * nonce wrap, or the security of the whole
5940 * communication and the keys is destroyed.
5941 * We must drop the connection once we have
5942 * transfered too much data.
5943 *
5944 * NOTE: We assume nonces greater than 8 bytes.
5945 */
5946 generate_random_buffer((uint8_t *)&session->smb2->nonce_high_random,
5947 sizeof(session->smb2->nonce_high_random));
5948 switch (conn->smb2.server.cipher) {
5949 case SMB2_ENCRYPTION_AES128_CCM:
5950 nonce_size = AES_CCM_128_NONCE_SIZE;
5951 break;
5952 case SMB2_ENCRYPTION_AES128_GCM:
5953 nonce_size = AES_GCM_128_IV_SIZE;
5954 break;
5955 default:
5956 nonce_size = 0;
5957 break;
5958 }
5959 session->smb2->nonce_high_max = SMB2_NONCE_HIGH_MAX(nonce_size);
5960 session->smb2->nonce_high = 0;
5961 session->smb2->nonce_low = 0;
5962
5963 return NT_STATUS_OK;
5964 }
5965
5966 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
5967 struct smbXcli_session *session1,
5968 struct smbXcli_conn *conn,
5969 struct smbXcli_session **_session2)
5970 {
5971 struct smbXcli_session *session2;
5972
5973 if (session1->smb2->signing_key.length == 0) {
5974 return NT_STATUS_INVALID_PARAMETER_MIX;
5975 }
5976
5977 if (conn == NULL) {
5978 return NT_STATUS_INVALID_PARAMETER_MIX;
5979 }
5980
5981 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
5982 if (session2 == NULL) {
5983 return NT_STATUS_NO_MEMORY;
5984 }
5985 session2->smb2 = talloc_reference(session2, session1->smb2);
5986 if (session2->smb2 == NULL) {
5987 talloc_free(session2);
5988 return NT_STATUS_NO_MEMORY;
5989 }
5990
5991 talloc_set_destructor(session2, smbXcli_session_destructor);
5992 DLIST_ADD_END(conn->sessions, session2);
5993 session2->conn = conn;
5994
5995 memcpy(session2->smb2_channel.preauth_sha512,
5996 conn->smb2.preauth_sha512,
5997 sizeof(session2->smb2_channel.preauth_sha512));
5998
5999 *_session2 = session2;
6000 return NT_STATUS_OK;
6001 }
6002
6003 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
6004 const DATA_BLOB _channel_key,
6005 const struct iovec *recv_iov)
6006 {
6007 struct smbXcli_conn *conn = session->conn;
6008 uint8_t channel_key[16];
6009 NTSTATUS status;
6010 struct _derivation {
6011 DATA_BLOB label;
6012 DATA_BLOB context;
6013 };
6014 struct {
6015 struct _derivation signing;
6016 } derivation = { };
6017
6018 if (conn == NULL) {
6019 return NT_STATUS_INVALID_PARAMETER_MIX;
6020 }
6021
6022 if (session->smb2_channel.signing_key.length != 0) {
6023 return NT_STATUS_INVALID_PARAMETER_MIX;
6024 }
6025
6026 if (conn->protocol >= PROTOCOL_SMB3_10) {
6027 struct _derivation *d;
6028 DATA_BLOB p;
6029
6030 p = data_blob_const(session->smb2_channel.preauth_sha512,
6031 sizeof(session->smb2_channel.preauth_sha512));
6032
6033 d = &derivation.signing;
6034 d->label = data_blob_string_const_null("SMBSigningKey");
6035 d->context = p;
6036 } else if (conn->protocol >= PROTOCOL_SMB2_24) {
6037 struct _derivation *d;
6038
6039 d = &derivation.signing;
6040 d->label = data_blob_string_const_null("SMB2AESCMAC");
6041 d->context = data_blob_string_const_null("SmbSign");
6042 }
6043
6044 ZERO_STRUCT(channel_key);
6045 memcpy(channel_key, _channel_key.data,
6046 MIN(_channel_key.length, sizeof(channel_key)));
6047
6048 session->smb2_channel.signing_key = data_blob_talloc(session,
6049 channel_key,
6050 sizeof(channel_key));
6051 if (session->smb2_channel.signing_key.data == NULL) {
6052 ZERO_STRUCT(channel_key);
6053 return NT_STATUS_NO_MEMORY;
6054 }
6055
6056 if (conn->protocol >= PROTOCOL_SMB2_24) {
6057 struct _derivation *d = &derivation.signing;
6058
6059 smb2_key_derivation(channel_key, sizeof(channel_key),
6060 d->label.data, d->label.length,
6061 d->context.data, d->context.length,
6062 session->smb2_channel.signing_key.data);
6063 }
6064 ZERO_STRUCT(channel_key);
6065
6066 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
6067 session->conn->protocol,
6068 recv_iov, 3);
6069 if (!NT_STATUS_IS_OK(status)) {
6070 return status;
6071 }
6072
6073 return NT_STATUS_OK;
6074 }
6075
6076 NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
6077 {
6078 if (!session->smb2->should_sign) {
6079 /*
6080 * We need required signing on the session
6081 * in order to prevent man in the middle attacks.
6082 */
6083 return NT_STATUS_INVALID_PARAMETER_MIX;
6084 }
6085
6086 if (session->smb2->should_encrypt) {
6087 return NT_STATUS_OK;
6088 }
6089
6090 if (session->conn->protocol < PROTOCOL_SMB2_24) {
6091 return NT_STATUS_NOT_SUPPORTED;
6092 }
6093
6094 if (session->conn->smb2.server.cipher == 0) {
6095 return NT_STATUS_NOT_SUPPORTED;
6096 }
6097
6098 if (session->smb2->signing_key.data == NULL) {
6099 return NT_STATUS_NOT_SUPPORTED;
6100 }
6101 session->smb2->should_encrypt = true;
6102 return NT_STATUS_OK;
6103 }
6104
6105 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
6106 {
6107 struct smbXcli_tcon *tcon;
6108
6109 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
6110 if (tcon == NULL) {
6111 return NULL;
6112 }
6113
6114 return tcon;
6115 }
6116
6117 /*
6118 * Return a deep structure copy of a struct smbXcli_tcon *
6119 */
6120
6121 struct smbXcli_tcon *smbXcli_tcon_copy(TALLOC_CTX *mem_ctx,
6122 const struct smbXcli_tcon *tcon_in)
6123 {
6124 struct smbXcli_tcon *tcon;
6125
6126 tcon = talloc_memdup(mem_ctx, tcon_in, sizeof(struct smbXcli_tcon));
6127 if (tcon == NULL) {
6128 return NULL;
6129 }
6130
6131 /* Deal with the SMB1 strings. */
6132 if (tcon_in->smb1.service != NULL) {
6133 tcon->smb1.service = talloc_strdup(tcon, tcon_in->smb1.service);
6134 if (tcon->smb1.service == NULL) {
6135 TALLOC_FREE(tcon);
6136 return NULL;
6137 }
6138 }
6139 if (tcon->smb1.fs_type != NULL) {
6140 tcon->smb1.fs_type = talloc_strdup(tcon, tcon_in->smb1.fs_type);
6141 if (tcon->smb1.fs_type == NULL) {
6142 TALLOC_FREE(tcon);
6143 return NULL;
6144 }
6145 }
6146 return tcon;
6147 }
6148
6149 void smbXcli_tcon_set_fs_attributes(struct smbXcli_tcon *tcon,
6150 uint32_t fs_attributes)
6151 {
6152 tcon->fs_attributes = fs_attributes;
6153 }
6154
6155 uint32_t smbXcli_tcon_get_fs_attributes(struct smbXcli_tcon *tcon)
6156 {
6157 return tcon->fs_attributes;
6158 }
6159
6160 bool smbXcli_tcon_is_dfs_share(struct smbXcli_tcon *tcon)
6161 {
6162 if (tcon == NULL) {
6163 return false;
6164 }
6165
6166 if (tcon->is_smb1) {
6167 if (tcon->smb1.optional_support & SMB_SHARE_IN_DFS) {
6168 return true;
6169 }
6170
6171 return false;
6172 }
6173
6174 if (tcon->smb2.capabilities & SMB2_SHARE_CAP_DFS) {
6175 return true;
6176 }
6177
6178 return false;
6179 }
6180
6181 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
6182 {
6183 return tcon->smb1.tcon_id;
6184 }
6185
6186 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
6187 {
6188 tcon->is_smb1 = true;
6189 tcon->smb1.tcon_id = tcon_id;
6190 }
6191
6192 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
6193 uint16_t tcon_id,
6194 uint16_t optional_support,
6195 uint32_t maximal_access,
6196 uint32_t guest_maximal_access,
6197 const char *service,
6198 const char *fs_type)
6199 {
6200 tcon->is_smb1 = true;
6201 tcon->fs_attributes = 0;
6202 tcon->smb1.tcon_id = tcon_id;
6203 tcon->smb1.optional_support = optional_support;
6204 tcon->smb1.maximal_access = maximal_access;
6205 tcon->smb1.guest_maximal_access = guest_maximal_access;
6206
6207 TALLOC_FREE(tcon->smb1.service);
6208 tcon->smb1.service = talloc_strdup(tcon, service);
6209 if (service != NULL && tcon->smb1.service == NULL) {
6210 return false;
6211 }
6212
6213 TALLOC_FREE(tcon->smb1.fs_type);
6214 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
6215 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
6216 return false;
6217 }
6218
6219 return true;
6220 }
6221
6222 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
6223 {
6224 return tcon->smb2.tcon_id;
6225 }
6226
6227 void smb2cli_tcon_set_id(struct smbXcli_tcon *tcon, uint32_t tcon_id)
6228 {
6229 tcon->smb2.tcon_id = tcon_id;
6230 }
6231
6232 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
6233 {
6234 return tcon->smb2.capabilities;
6235 }
6236
6237 uint32_t smb2cli_tcon_flags(struct smbXcli_tcon *tcon)
6238 {
6239 return tcon->smb2.flags;
6240 }
6241
6242 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
6243 struct smbXcli_session *session,
6244 uint32_t tcon_id,
6245 uint8_t type,
6246 uint32_t flags,
6247 uint32_t capabilities,
6248 uint32_t maximal_access)
6249 {
6250 tcon->is_smb1 = false;
6251 tcon->fs_attributes = 0;
6252 tcon->smb2.tcon_id = tcon_id;
6253 tcon->smb2.type = type;
6254 tcon->smb2.flags = flags;
6255 tcon->smb2.capabilities = capabilities;
6256 tcon->smb2.maximal_access = maximal_access;
6257
6258 tcon->smb2.should_sign = false;
6259 tcon->smb2.should_encrypt = false;
6260
6261 if (session == NULL) {
6262 return;
6263 }
6264
6265 tcon->smb2.should_sign = session->smb2->should_sign;
6266 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
6267
6268 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
6269 tcon->smb2.should_encrypt = true;
6270 }
6271 }
6272
6273 void smb2cli_tcon_should_sign(struct smbXcli_tcon *tcon,
6274 bool should_sign)
6275 {
6276 tcon->smb2.should_sign = should_sign;
6277 }
6278
6279 bool smb2cli_tcon_is_signing_on(struct smbXcli_tcon *tcon)
6280 {
6281 if (tcon->smb2.should_encrypt) {
6282 return true;
6283 }
6284
6285 return tcon->smb2.should_sign;
6286 }
6287
6288 void smb2cli_tcon_should_encrypt(struct smbXcli_tcon *tcon,
6289 bool should_encrypt)
6290 {
6291 tcon->smb2.should_encrypt = should_encrypt;
6292 }
6293
6294 bool smb2cli_tcon_is_encryption_on(struct smbXcli_tcon *tcon)
6295 {
6296 return tcon->smb2.should_encrypt;
6297 }
6298
6299 void smb2cli_conn_set_mid(struct smbXcli_conn *conn, uint64_t mid)
6300 {
6301 conn->smb2.mid = mid;
6302 }
6303
6304 uint64_t smb2cli_conn_get_mid(struct smbXcli_conn *conn)
6305 {
6306 return conn->smb2.mid;
6307 }
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