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ctdb-recovery: Do not run local ip verification when in recovery
[Samba.git] / libcli / smb / smbXcli_base.c
blob593edf9ce780553f74611b067cc7ebd28120d69c
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 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
472 {
473 set_socket_options(conn->sock_fd, options);
474 }
475
476 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
477 {
478 return &conn->local_ss;
479 }
480
481 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
482 {
483 return &conn->remote_ss;
484 }
485
486 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
487 {
488 return conn->remote_name;
489 }
490
491 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
492 {
493 if (conn->protocol >= PROTOCOL_SMB2_02) {
494 /*
495 * TODO...
496 */
497 return 1;
498 }
499
500 return conn->smb1.server.max_mux;
501 }
502
503 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
504 {
505 if (conn->protocol >= PROTOCOL_SMB2_02) {
506 return conn->smb2.server.system_time;
507 }
508
509 return conn->smb1.server.system_time;
510 }
511
512 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
513 {
514 if (conn->protocol >= PROTOCOL_SMB2_02) {
515 return &conn->smb2.server.gss_blob;
516 }
517
518 return &conn->smb1.server.gss_blob;
519 }
520
521 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
522 {
523 if (conn->protocol >= PROTOCOL_SMB2_02) {
524 return &conn->smb2.server.guid;
525 }
526
527 return &conn->smb1.server.guid;
528 }
529
530 struct smbXcli_conn_samba_suicide_state {
531 struct smbXcli_conn *conn;
532 struct iovec iov;
533 uint8_t buf[9];
534 struct tevent_req *write_req;
535 };
536
537 static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
538 enum tevent_req_state req_state);
539 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
540
541 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
542 struct tevent_context *ev,
543 struct smbXcli_conn *conn,
544 uint8_t exitcode)
545 {
546 struct tevent_req *req, *subreq;
547 struct smbXcli_conn_samba_suicide_state *state;
548
549 req = tevent_req_create(mem_ctx, &state,
550 struct smbXcli_conn_samba_suicide_state);
551 if (req == NULL) {
552 return NULL;
553 }
554 state->conn = conn;
555 SIVAL(state->buf, 4, 0x74697865);
556 SCVAL(state->buf, 8, exitcode);
557 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
558
559 if (conn->suicide_req != NULL) {
560 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
561 return tevent_req_post(req, ev);
562 }
563
564 state->iov.iov_base = state->buf;
565 state->iov.iov_len = sizeof(state->buf);
566
567 subreq = writev_send(state, ev, conn->outgoing, conn->sock_fd,
568 false, &state->iov, 1);
569 if (tevent_req_nomem(subreq, req)) {
570 return tevent_req_post(req, ev);
571 }
572 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
573 state->write_req = subreq;
574
575 tevent_req_set_cleanup_fn(req, smbXcli_conn_samba_suicide_cleanup);
576
577 /*
578 * We need to use tevent_req_defer_callback()
579 * in order to allow smbXcli_conn_disconnect()
580 * to do a safe cleanup.
581 */
582 tevent_req_defer_callback(req, ev);
583 conn->suicide_req = req;
584
585 return req;
586 }
587
588 static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
589 enum tevent_req_state req_state)
590 {
591 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
592 req, struct smbXcli_conn_samba_suicide_state);
593
594 TALLOC_FREE(state->write_req);
595
596 if (state->conn == NULL) {
597 return;
598 }
599
600 if (state->conn->suicide_req == req) {
601 state->conn->suicide_req = NULL;
602 }
603 state->conn = NULL;
604 }
605
606 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
607 {
608 struct tevent_req *req = tevent_req_callback_data(
609 subreq, struct tevent_req);
610 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
611 req, struct smbXcli_conn_samba_suicide_state);
612 ssize_t nwritten;
613 int err;
614
615 state->write_req = NULL;
616
617 nwritten = writev_recv(subreq, &err);
618 TALLOC_FREE(subreq);
619 if (nwritten == -1) {
620 /* here, we need to notify all pending requests */
621 NTSTATUS status = map_nt_error_from_unix_common(err);
622 smbXcli_conn_disconnect(state->conn, status);
623 return;
624 }
625 tevent_req_done(req);
626 }
627
628 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
629 {
630 return tevent_req_simple_recv_ntstatus(req);
631 }
632
633 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
634 uint8_t exitcode)
635 {
636 TALLOC_CTX *frame = talloc_stackframe();
637 struct tevent_context *ev;
638 struct tevent_req *req;
639 NTSTATUS status = NT_STATUS_NO_MEMORY;
640 bool ok;
641
642 if (smbXcli_conn_has_async_calls(conn)) {
643 /*
644 * Can't use sync call while an async call is in flight
645 */
646 status = NT_STATUS_INVALID_PARAMETER_MIX;
647 goto fail;
648 }
649 ev = samba_tevent_context_init(frame);
650 if (ev == NULL) {
651 goto fail;
652 }
653 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
654 if (req == NULL) {
655 goto fail;
656 }
657 ok = tevent_req_poll_ntstatus(req, ev, &status);
658 if (!ok) {
659 goto fail;
660 }
661 status = smbXcli_conn_samba_suicide_recv(req);
662 fail:
663 TALLOC_FREE(frame);
664 return status;
665 }
666
667 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
668 {
669 return conn->smb1.capabilities;
670 }
671
672 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
673 {
674 return conn->smb1.max_xmit;
675 }
676
677 bool smb1cli_conn_req_possible(struct smbXcli_conn *conn)
678 {
679 size_t pending = talloc_array_length(conn->pending);
680 uint16_t possible = conn->smb1.server.max_mux;
681
682 if (pending >= possible) {
683 return false;
684 }
685
686 return true;
687 }
688
689 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
690 {
691 return conn->smb1.server.session_key;
692 }
693
694 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
695 {
696 return conn->smb1.server.challenge;
697 }
698
699 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
700 {
701 return conn->smb1.server.security_mode;
702 }
703
704 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
705 {
706 return conn->smb1.server.readbraw;
707 }
708
709 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
710 {
711 return conn->smb1.server.writebraw;
712 }
713
714 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
715 {
716 return conn->smb1.server.lockread;
717 }
718
719 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
720 {
721 return conn->smb1.server.writeunlock;
722 }
723
724 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
725 {
726 return conn->smb1.server.time_zone;
727 }
728
729 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
730 const DATA_BLOB user_session_key,
731 const DATA_BLOB response)
732 {
733 return smb_signing_activate(conn->smb1.signing,
734 user_session_key,
735 response);
736 }
737
738 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
739 const uint8_t *buf, uint32_t seqnum)
740 {
741 const uint8_t *hdr = buf + NBT_HDR_SIZE;
742 size_t len = smb_len_nbt(buf);
743
744 return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
745 }
746
747 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
748 {
749 return smb_signing_is_active(conn->smb1.signing);
750 }
751
752 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
753 struct smb_trans_enc_state *es)
754 {
755 /* Replace the old state, if any. */
756 if (conn->smb1.trans_enc) {
757 TALLOC_FREE(conn->smb1.trans_enc);
758 }
759 conn->smb1.trans_enc = es;
760 }
761
762 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
763 {
764 return common_encryption_on(conn->smb1.trans_enc);
765 }
766
767
768 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
769 {
770 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
771 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
772
773 if (NT_STATUS_IS_OK(status)) {
774 return NT_STATUS_OK;
775 }
776
777 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
778 return status;
779 }
780
781 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
782 }
783
784 /**
785 * Is the SMB command able to hold an AND_X successor
786 * @param[in] cmd The SMB command in question
787 * @retval Can we add a chained request after "cmd"?
788 */
789 bool smb1cli_is_andx_req(uint8_t cmd)
790 {
791 switch (cmd) {
792 case SMBtconX:
793 case SMBlockingX:
794 case SMBopenX:
795 case SMBreadX:
796 case SMBwriteX:
797 case SMBsesssetupX:
798 case SMBulogoffX:
799 case SMBntcreateX:
800 return true;
801 break;
802 default:
803 break;
804 }
805
806 return false;
807 }
808
809 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
810 {
811 size_t num_pending = talloc_array_length(conn->pending);
812 uint16_t result;
813
814 if (conn->protocol == PROTOCOL_NONE) {
815 /*
816 * This is what windows sends on the SMB1 Negprot request
817 * and some vendors reuse the SMB1 MID as SMB2 sequence number.
818 */
819 return 0;
820 }
821
822 while (true) {
823 size_t i;
824
825 result = conn->smb1.mid++;
826 if ((result == 0) || (result == 0xffff)) {
827 continue;
828 }
829
830 for (i=0; i<num_pending; i++) {
831 if (result == smb1cli_req_mid(conn->pending[i])) {
832 break;
833 }
834 }
835
836 if (i == num_pending) {
837 return result;
838 }
839 }
840 }
841
842 static NTSTATUS smbXcli_req_cancel_write_req(struct tevent_req *req)
843 {
844 struct smbXcli_req_state *state =
845 tevent_req_data(req,
846 struct smbXcli_req_state);
847 struct smbXcli_conn *conn = state->conn;
848 size_t num_pending = talloc_array_length(conn->pending);
849 ssize_t ret;
850 int err;
851 bool ok;
852
853 if (state->write_req == NULL) {
854 return NT_STATUS_OK;
855 }
856
857 /*
858 * Check if it's possible to cancel the request.
859 * If the result is true it's not to late.
860 * See writev_cancel().
861 */
862 ok = tevent_req_cancel(state->write_req);
863 if (ok) {
864 TALLOC_FREE(state->write_req);
865
866 if (conn->protocol >= PROTOCOL_SMB2_02) {
867 /*
868 * SMB2 has a sane signing state.
869 */
870 return NT_STATUS_OK;
871 }
872
873 if (num_pending > 1) {
874 /*
875 * We have more pending requests following us. This
876 * means the signing state will be broken for them.
877 *
878 * As a solution we could add the requests directly to
879 * our outgoing queue and do the signing in the trigger
880 * function and then use writev_send() without passing a
881 * queue. That way we'll only sign packets we're most
882 * likely send to the wire.
883 */
884 return NT_STATUS_REQUEST_OUT_OF_SEQUENCE;
885 }
886
887 /*
888 * If we're the only request that's
889 * pending, we're able to recover the signing
890 * state.
891 */
892 smb_signing_cancel_reply(conn->smb1.signing,
893 state->smb1.one_way_seqnum);
894 return NT_STATUS_OK;
895 }
896
897 ret = writev_recv(state->write_req, &err);
898 TALLOC_FREE(state->write_req);
899 if (ret == -1) {
900 return map_nt_error_from_unix_common(err);
901 }
902
903 return NT_STATUS_OK;
904 }
905
906 void smbXcli_req_unset_pending(struct tevent_req *req)
907 {
908 struct smbXcli_req_state *state =
909 tevent_req_data(req,
910 struct smbXcli_req_state);
911 struct smbXcli_conn *conn = state->conn;
912 size_t num_pending = talloc_array_length(conn->pending);
913 size_t i;
914 NTSTATUS cancel_status;
915
916 cancel_status = smbXcli_req_cancel_write_req(req);
917
918 if (state->smb1.mid != 0) {
919 /*
920 * This is a [nt]trans[2] request which waits
921 * for more than one reply.
922 */
923 if (!NT_STATUS_IS_OK(cancel_status)) {
924 /*
925 * If the write_req cancel didn't work
926 * we can't use the connection anymore.
927 */
928 smbXcli_conn_disconnect(conn, cancel_status);
929 return;
930 }
931 return;
932 }
933
934 tevent_req_set_cleanup_fn(req, NULL);
935
936 if (num_pending == 1) {
937 /*
938 * The pending read_smb tevent_req is a child of
939 * conn->pending. So if nothing is pending anymore, we need to
940 * delete the socket read fde.
941 */
942 /* TODO: smbXcli_conn_cancel_read_req */
943 TALLOC_FREE(conn->pending);
944 conn->read_smb_req = NULL;
945
946 if (!NT_STATUS_IS_OK(cancel_status)) {
947 /*
948 * If the write_req cancel didn't work
949 * we can't use the connection anymore.
950 */
951 smbXcli_conn_disconnect(conn, cancel_status);
952 return;
953 }
954 return;
955 }
956
957 for (i=0; i<num_pending; i++) {
958 if (req == conn->pending[i]) {
959 break;
960 }
961 }
962 if (i == num_pending) {
963 /*
964 * Something's seriously broken. Just returning here is the
965 * right thing nevertheless, the point of this routine is to
966 * remove ourselves from conn->pending.
967 */
968
969 if (!NT_STATUS_IS_OK(cancel_status)) {
970 /*
971 * If the write_req cancel didn't work
972 * we can't use the connection anymore.
973 */
974 smbXcli_conn_disconnect(conn, cancel_status);
975 return;
976 }
977 return;
978 }
979
980 /*
981 * Remove ourselves from the conn->pending array
982 */
983 for (; i < (num_pending - 1); i++) {
984 conn->pending[i] = conn->pending[i+1];
985 }
986
987 /*
988 * No NULL check here, we're shrinking by sizeof(void *), and
989 * talloc_realloc just adjusts the size for this.
990 */
991 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
992 num_pending - 1);
993
994 if (!NT_STATUS_IS_OK(cancel_status)) {
995 /*
996 * If the write_req cancel didn't work
997 * we can't use the connection anymore.
998 */
999 smbXcli_conn_disconnect(conn, cancel_status);
1000 return;
1001 }
1002 return;
1003 }
1004
1005 static void smbXcli_req_cleanup(struct tevent_req *req,
1006 enum tevent_req_state req_state)
1007 {
1008 struct smbXcli_req_state *state =
1009 tevent_req_data(req,
1010 struct smbXcli_req_state);
1011 struct smbXcli_conn *conn = state->conn;
1012 NTSTATUS cancel_status;
1013
1014 switch (req_state) {
1015 case TEVENT_REQ_RECEIVED:
1016 /*
1017 * Make sure we really remove it from
1018 * the pending array on destruction.
1019 *
1020 * smbXcli_req_unset_pending() calls
1021 * smbXcli_req_cancel_write_req() internal
1022 */
1023 state->smb1.mid = 0;
1024 smbXcli_req_unset_pending(req);
1025 return;
1026 default:
1027 cancel_status = smbXcli_req_cancel_write_req(req);
1028 if (!NT_STATUS_IS_OK(cancel_status)) {
1029 /*
1030 * If the write_req cancel didn't work
1031 * we can't use the connection anymore.
1032 */
1033 smbXcli_conn_disconnect(conn, cancel_status);
1034 return;
1035 }
1036 return;
1037 }
1038 }
1039
1040 static bool smb1cli_req_cancel(struct tevent_req *req);
1041 static bool smb2cli_req_cancel(struct tevent_req *req);
1042
1043 static bool smbXcli_req_cancel(struct tevent_req *req)
1044 {
1045 struct smbXcli_req_state *state =
1046 tevent_req_data(req,
1047 struct smbXcli_req_state);
1048
1049 if (!smbXcli_conn_is_connected(state->conn)) {
1050 return false;
1051 }
1052
1053 if (state->conn->protocol == PROTOCOL_NONE) {
1054 return false;
1055 }
1056
1057 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
1058 return smb2cli_req_cancel(req);
1059 }
1060
1061 return smb1cli_req_cancel(req);
1062 }
1063
1064 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
1065
1066 bool smbXcli_req_set_pending(struct tevent_req *req)
1067 {
1068 struct smbXcli_req_state *state =
1069 tevent_req_data(req,
1070 struct smbXcli_req_state);
1071 struct smbXcli_conn *conn;
1072 struct tevent_req **pending;
1073 size_t num_pending;
1074
1075 conn = state->conn;
1076
1077 if (!smbXcli_conn_is_connected(conn)) {
1078 return false;
1079 }
1080
1081 num_pending = talloc_array_length(conn->pending);
1082
1083 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
1084 num_pending+1);
1085 if (pending == NULL) {
1086 return false;
1087 }
1088 pending[num_pending] = req;
1089 conn->pending = pending;
1090 tevent_req_set_cleanup_fn(req, smbXcli_req_cleanup);
1091 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1092
1093 if (!smbXcli_conn_receive_next(conn)) {
1094 /*
1095 * the caller should notify the current request
1096 *
1097 * And all other pending requests get notified
1098 * by smbXcli_conn_disconnect().
1099 */
1100 smbXcli_req_unset_pending(req);
1101 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1102 return false;
1103 }
1104
1105 return true;
1106 }
1107
1108 static void smbXcli_conn_received(struct tevent_req *subreq);
1109
1110 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
1111 {
1112 size_t num_pending = talloc_array_length(conn->pending);
1113 struct tevent_req *req;
1114 struct smbXcli_req_state *state;
1115
1116 if (conn->read_smb_req != NULL) {
1117 return true;
1118 }
1119
1120 if (num_pending == 0) {
1121 if (conn->smb2.mid < UINT64_MAX) {
1122 /* no more pending requests, so we are done for now */
1123 return true;
1124 }
1125
1126 /*
1127 * If there are no more SMB2 requests possible,
1128 * because we are out of message ids,
1129 * we need to disconnect.
1130 */
1131 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
1132 return true;
1133 }
1134
1135 req = conn->pending[0];
1136 state = tevent_req_data(req, struct smbXcli_req_state);
1137
1138 /*
1139 * We're the first ones, add the read_smb request that waits for the
1140 * answer from the server
1141 */
1142 conn->read_smb_req = read_smb_send(conn->pending,
1143 state->ev,
1144 conn->sock_fd);
1145 if (conn->read_smb_req == NULL) {
1146 return false;
1147 }
1148 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
1149 return true;
1150 }
1151
1152 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
1153 {
1154 struct smbXcli_session *session;
1155 int sock_fd = conn->sock_fd;
1156
1157 tevent_queue_stop(conn->outgoing);
1158
1159 conn->sock_fd = -1;
1160
1161 session = conn->sessions;
1162 if (talloc_array_length(conn->pending) == 0) {
1163 /*
1164 * if we do not have pending requests
1165 * there is no need to update the channel_sequence
1166 */
1167 session = NULL;
1168 }
1169 for (; session; session = session->next) {
1170 smb2cli_session_increment_channel_sequence(session);
1171 }
1172
1173 if (conn->suicide_req != NULL) {
1174 /*
1175 * smbXcli_conn_samba_suicide_send()
1176 * used tevent_req_defer_callback() already.
1177 */
1178 if (!NT_STATUS_IS_OK(status)) {
1179 tevent_req_nterror(conn->suicide_req, status);
1180 }
1181 conn->suicide_req = NULL;
1182 }
1183
1184 /*
1185 * Cancel all pending requests. We do not do a for-loop walking
1186 * conn->pending because that array changes in
1187 * smbXcli_req_unset_pending.
1188 */
1189 while (talloc_array_length(conn->pending) > 0) {
1190 struct tevent_req *req;
1191 struct smbXcli_req_state *state;
1192 struct tevent_req **chain;
1193 size_t num_chained;
1194 size_t i;
1195
1196 req = conn->pending[0];
1197 state = tevent_req_data(req, struct smbXcli_req_state);
1198
1199 if (state->smb1.chained_requests == NULL) {
1200 bool in_progress;
1201
1202 /*
1203 * We're dead. No point waiting for trans2
1204 * replies.
1205 */
1206 state->smb1.mid = 0;
1207
1208 smbXcli_req_unset_pending(req);
1209
1210 if (NT_STATUS_IS_OK(status)) {
1211 /* do not notify the callers */
1212 continue;
1213 }
1214
1215 in_progress = tevent_req_is_in_progress(req);
1216 if (!in_progress) {
1217 /*
1218 * already finished
1219 */
1220 continue;
1221 }
1222
1223 /*
1224 * we need to defer the callback, because we may notify
1225 * more then one caller.
1226 */
1227 tevent_req_defer_callback(req, state->ev);
1228 tevent_req_nterror(req, status);
1229 continue;
1230 }
1231
1232 chain = talloc_move(conn, &state->smb1.chained_requests);
1233 num_chained = talloc_array_length(chain);
1234
1235 for (i=0; i<num_chained; i++) {
1236 bool in_progress;
1237
1238 req = chain[i];
1239 state = tevent_req_data(req, struct smbXcli_req_state);
1240
1241 /*
1242 * We're dead. No point waiting for trans2
1243 * replies.
1244 */
1245 state->smb1.mid = 0;
1246
1247 smbXcli_req_unset_pending(req);
1248
1249 if (NT_STATUS_IS_OK(status)) {
1250 /* do not notify the callers */
1251 continue;
1252 }
1253
1254 in_progress = tevent_req_is_in_progress(req);
1255 if (!in_progress) {
1256 /*
1257 * already finished
1258 */
1259 continue;
1260 }
1261
1262 /*
1263 * we need to defer the callback, because we may notify
1264 * more than one caller.
1265 */
1266 tevent_req_defer_callback(req, state->ev);
1267 tevent_req_nterror(req, status);
1268 }
1269 TALLOC_FREE(chain);
1270 }
1271
1272 if (sock_fd != -1) {
1273 close(sock_fd);
1274 }
1275 }
1276
1277 /*
1278 * Fetch a smb request's mid. Only valid after the request has been sent by
1279 * smb1cli_req_send().
1280 */
1281 uint16_t smb1cli_req_mid(struct tevent_req *req)
1282 {
1283 struct smbXcli_req_state *state =
1284 tevent_req_data(req,
1285 struct smbXcli_req_state);
1286
1287 if (state->smb1.mid != 0) {
1288 return state->smb1.mid;
1289 }
1290
1291 return SVAL(state->smb1.hdr, HDR_MID);
1292 }
1293
1294 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1295 {
1296 struct smbXcli_req_state *state =
1297 tevent_req_data(req,
1298 struct smbXcli_req_state);
1299
1300 state->smb1.mid = mid;
1301 }
1302
1303 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1304 {
1305 struct smbXcli_req_state *state =
1306 tevent_req_data(req,
1307 struct smbXcli_req_state);
1308
1309 return state->smb1.seqnum;
1310 }
1311
1312 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1313 {
1314 struct smbXcli_req_state *state =
1315 tevent_req_data(req,
1316 struct smbXcli_req_state);
1317
1318 state->smb1.seqnum = seqnum;
1319 }
1320
1321 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1322 {
1323 ssize_t ret = iov_buflen(iov, count);
1324
1325 /* Ignore the overflow case for now ... */
1326 return ret;
1327 }
1328
1329 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1330 const struct iovec *iov,
1331 int count)
1332 {
1333 ssize_t buflen;
1334 uint8_t *buf;
1335
1336 buflen = iov_buflen(iov, count);
1337 if (buflen == -1) {
1338 return NULL;
1339 }
1340
1341 buf = talloc_array(mem_ctx, uint8_t, buflen);
1342 if (buf == NULL) {
1343 return NULL;
1344 }
1345
1346 iov_buf(iov, count, buf, buflen);
1347
1348 return buf;
1349 }
1350
1351 static void smb1cli_req_flags(enum protocol_types protocol,
1352 uint32_t smb1_capabilities,
1353 uint8_t smb_command,
1354 uint8_t additional_flags,
1355 uint8_t clear_flags,
1356 uint8_t *_flags,
1357 uint16_t additional_flags2,
1358 uint16_t clear_flags2,
1359 uint16_t *_flags2)
1360 {
1361 uint8_t flags = 0;
1362 uint16_t flags2 = 0;
1363
1364 if (protocol >= PROTOCOL_LANMAN1) {
1365 flags |= FLAG_CASELESS_PATHNAMES;
1366 flags |= FLAG_CANONICAL_PATHNAMES;
1367 }
1368
1369 if (protocol >= PROTOCOL_LANMAN2) {
1370 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1371 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1372 }
1373
1374 if (protocol >= PROTOCOL_NT1) {
1375 flags2 |= FLAGS2_IS_LONG_NAME;
1376
1377 if (smb1_capabilities & CAP_UNICODE) {
1378 flags2 |= FLAGS2_UNICODE_STRINGS;
1379 }
1380 if (smb1_capabilities & CAP_STATUS32) {
1381 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1382 }
1383 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1384 flags2 |= FLAGS2_EXTENDED_SECURITY;
1385 }
1386 }
1387
1388 flags |= additional_flags;
1389 flags &= ~clear_flags;
1390 flags2 |= additional_flags2;
1391 flags2 &= ~clear_flags2;
1392
1393 *_flags = flags;
1394 *_flags2 = flags2;
1395 }
1396
1397 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1398
1399 static bool smb1cli_req_cancel(struct tevent_req *req)
1400 {
1401 struct smbXcli_req_state *state =
1402 tevent_req_data(req,
1403 struct smbXcli_req_state);
1404 uint8_t flags;
1405 uint16_t flags2;
1406 uint32_t pid;
1407 uint16_t mid;
1408 struct tevent_req *subreq;
1409 NTSTATUS status;
1410
1411 flags = CVAL(state->smb1.hdr, HDR_FLG);
1412 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1413 pid = SVAL(state->smb1.hdr, HDR_PID);
1414 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1415 mid = SVAL(state->smb1.hdr, HDR_MID);
1416
1417 subreq = smb1cli_req_create(state, state->ev,
1418 state->conn,
1419 SMBntcancel,
1420 flags, 0,
1421 flags2, 0,
1422 0, /* timeout */
1423 pid,
1424 state->tcon,
1425 state->session,
1426 0, NULL, /* vwv */
1427 0, NULL); /* bytes */
1428 if (subreq == NULL) {
1429 return false;
1430 }
1431 smb1cli_req_set_mid(subreq, mid);
1432
1433 status = smb1cli_req_chain_submit(&subreq, 1);
1434 if (!NT_STATUS_IS_OK(status)) {
1435 TALLOC_FREE(subreq);
1436 return false;
1437 }
1438 smb1cli_req_set_mid(subreq, 0);
1439
1440 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1441
1442 return true;
1443 }
1444
1445 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1446 {
1447 /* we do not care about the result */
1448 TALLOC_FREE(subreq);
1449 }
1450
1451 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1452 struct tevent_context *ev,
1453 struct smbXcli_conn *conn,
1454 uint8_t smb_command,
1455 uint8_t additional_flags,
1456 uint8_t clear_flags,
1457 uint16_t additional_flags2,
1458 uint16_t clear_flags2,
1459 uint32_t timeout_msec,
1460 uint32_t pid,
1461 struct smbXcli_tcon *tcon,
1462 struct smbXcli_session *session,
1463 uint8_t wct, uint16_t *vwv,
1464 int iov_count,
1465 struct iovec *bytes_iov)
1466 {
1467 struct tevent_req *req;
1468 struct smbXcli_req_state *state;
1469 uint8_t flags = 0;
1470 uint16_t flags2 = 0;
1471 uint16_t uid = 0;
1472 uint16_t tid = 0;
1473 ssize_t num_bytes;
1474
1475 if (iov_count > MAX_SMB_IOV) {
1476 /*
1477 * Should not happen :-)
1478 */
1479 return NULL;
1480 }
1481
1482 req = tevent_req_create(mem_ctx, &state,
1483 struct smbXcli_req_state);
1484 if (req == NULL) {
1485 return NULL;
1486 }
1487 state->ev = ev;
1488 state->conn = conn;
1489 state->session = session;
1490 state->tcon = tcon;
1491
1492 if (session) {
1493 uid = session->smb1.session_id;
1494 }
1495
1496 if (tcon) {
1497 tid = tcon->smb1.tcon_id;
1498
1499 if (tcon->fs_attributes & FILE_CASE_SENSITIVE_SEARCH) {
1500 clear_flags |= FLAG_CASELESS_PATHNAMES;
1501 } else {
1502 /* Default setting, case insensitive. */
1503 additional_flags |= FLAG_CASELESS_PATHNAMES;
1504 }
1505
1506 if (smbXcli_conn_dfs_supported(conn) &&
1507 smbXcli_tcon_is_dfs_share(tcon))
1508 {
1509 additional_flags2 |= FLAGS2_DFS_PATHNAMES;
1510 }
1511 }
1512
1513 state->smb1.recv_cmd = 0xFF;
1514 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1515 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1516 if (state->smb1.recv_iov == NULL) {
1517 TALLOC_FREE(req);
1518 return NULL;
1519 }
1520
1521 smb1cli_req_flags(conn->protocol,
1522 conn->smb1.capabilities,
1523 smb_command,
1524 additional_flags,
1525 clear_flags,
1526 &flags,
1527 additional_flags2,
1528 clear_flags2,
1529 &flags2);
1530
1531 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1532 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1533 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1534 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1535 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1536 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1537 SSVAL(state->smb1.hdr, HDR_TID, tid);
1538 SSVAL(state->smb1.hdr, HDR_PID, pid);
1539 SSVAL(state->smb1.hdr, HDR_UID, uid);
1540 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1541 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1542
1543 state->smb1.vwv = vwv;
1544
1545 num_bytes = iov_buflen(bytes_iov, iov_count);
1546 if (num_bytes == -1) {
1547 /*
1548 * I'd love to add a check for num_bytes<=UINT16_MAX here, but
1549 * the smbclient->samba connections can lie and transfer more.
1550 */
1551 TALLOC_FREE(req);
1552 return NULL;
1553 }
1554
1555 SSVAL(state->smb1.bytecount_buf, 0, num_bytes);
1556
1557 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1558 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1559 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1560 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1561 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1562 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1563 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1564 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1565
1566 if (iov_count != 0) {
1567 memcpy(&state->smb1.iov[4], bytes_iov,
1568 iov_count * sizeof(*bytes_iov));
1569 }
1570 state->smb1.iov_count = iov_count + 4;
1571
1572 if (timeout_msec > 0) {
1573 struct timeval endtime;
1574
1575 endtime = timeval_current_ofs_msec(timeout_msec);
1576 if (!tevent_req_set_endtime(req, ev, endtime)) {
1577 return req;
1578 }
1579 }
1580
1581 switch (smb_command) {
1582 case SMBtranss:
1583 case SMBtranss2:
1584 case SMBnttranss:
1585 state->one_way = true;
1586 break;
1587 case SMBntcancel:
1588 state->one_way = true;
1589 state->smb1.one_way_seqnum = true;
1590 break;
1591 case SMBlockingX:
1592 if ((wct == 8) &&
1593 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1594 state->one_way = true;
1595 }
1596 break;
1597 }
1598
1599 return req;
1600 }
1601
1602 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1603 struct iovec *iov, int iov_count,
1604 uint32_t *seqnum,
1605 bool one_way_seqnum)
1606 {
1607 TALLOC_CTX *frame = NULL;
1608 uint8_t *buf;
1609
1610 /*
1611 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1612 * iovec directly. MD5Update would do that just fine.
1613 */
1614
1615 if (iov_count < 4) {
1616 return NT_STATUS_INVALID_PARAMETER_MIX;
1617 }
1618 if (iov[0].iov_len != NBT_HDR_SIZE) {
1619 return NT_STATUS_INVALID_PARAMETER_MIX;
1620 }
1621 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1622 return NT_STATUS_INVALID_PARAMETER_MIX;
1623 }
1624 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1625 return NT_STATUS_INVALID_PARAMETER_MIX;
1626 }
1627 if (iov[3].iov_len != sizeof(uint16_t)) {
1628 return NT_STATUS_INVALID_PARAMETER_MIX;
1629 }
1630
1631 frame = talloc_stackframe();
1632
1633 buf = smbXcli_iov_concat(frame, &iov[1], iov_count - 1);
1634 if (buf == NULL) {
1635 return NT_STATUS_NO_MEMORY;
1636 }
1637
1638 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1639 one_way_seqnum);
1640 smb_signing_sign_pdu(conn->smb1.signing,
1641 buf, talloc_get_size(buf),
1642 *seqnum);
1643 memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1644
1645 TALLOC_FREE(frame);
1646 return NT_STATUS_OK;
1647 }
1648
1649 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1650 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1651 TALLOC_CTX *tmp_mem,
1652 uint8_t *inbuf);
1653
1654 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1655 struct smbXcli_req_state *state,
1656 struct iovec *iov, int iov_count)
1657 {
1658 struct tevent_req *subreq;
1659 NTSTATUS status;
1660 uint8_t cmd;
1661 uint16_t mid;
1662 ssize_t nbtlen;
1663
1664 if (!smbXcli_conn_is_connected(state->conn)) {
1665 return NT_STATUS_CONNECTION_DISCONNECTED;
1666 }
1667
1668 if (state->conn->protocol > PROTOCOL_NT1) {
1669 return NT_STATUS_REVISION_MISMATCH;
1670 }
1671
1672 if (iov_count < 4) {
1673 return NT_STATUS_INVALID_PARAMETER_MIX;
1674 }
1675 if (iov[0].iov_len != NBT_HDR_SIZE) {
1676 return NT_STATUS_INVALID_PARAMETER_MIX;
1677 }
1678 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1679 return NT_STATUS_INVALID_PARAMETER_MIX;
1680 }
1681 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1682 return NT_STATUS_INVALID_PARAMETER_MIX;
1683 }
1684 if (iov[3].iov_len != sizeof(uint16_t)) {
1685 return NT_STATUS_INVALID_PARAMETER_MIX;
1686 }
1687
1688 cmd = CVAL(iov[1].iov_base, HDR_COM);
1689 if (cmd == SMBreadBraw) {
1690 if (smbXcli_conn_has_async_calls(state->conn)) {
1691 return NT_STATUS_INVALID_PARAMETER_MIX;
1692 }
1693 state->conn->smb1.read_braw_req = req;
1694 }
1695
1696 if (state->smb1.mid != 0) {
1697 mid = state->smb1.mid;
1698 } else {
1699 mid = smb1cli_alloc_mid(state->conn);
1700 }
1701 SSVAL(iov[1].iov_base, HDR_MID, mid);
1702
1703 nbtlen = iov_buflen(&iov[1], iov_count-1);
1704 if ((nbtlen == -1) || (nbtlen > 0x1FFFF)) {
1705 return NT_STATUS_INVALID_PARAMETER_MIX;
1706 }
1707
1708 _smb_setlen_nbt(iov[0].iov_base, nbtlen);
1709
1710 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1711 &state->smb1.seqnum,
1712 state->smb1.one_way_seqnum);
1713
1714 if (!NT_STATUS_IS_OK(status)) {
1715 return status;
1716 }
1717
1718 /*
1719 * If we supported multiple encrytion contexts
1720 * here we'd look up based on tid.
1721 */
1722 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1723 char *buf, *enc_buf;
1724
1725 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1726 if (buf == NULL) {
1727 return NT_STATUS_NO_MEMORY;
1728 }
1729 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1730 (char *)buf, &enc_buf);
1731 TALLOC_FREE(buf);
1732 if (!NT_STATUS_IS_OK(status)) {
1733 DEBUG(0, ("Error in encrypting client message: %s\n",
1734 nt_errstr(status)));
1735 return status;
1736 }
1737 buf = (char *)talloc_memdup(state, enc_buf,
1738 smb_len_nbt(enc_buf)+4);
1739 SAFE_FREE(enc_buf);
1740 if (buf == NULL) {
1741 return NT_STATUS_NO_MEMORY;
1742 }
1743 iov[0].iov_base = (void *)buf;
1744 iov[0].iov_len = talloc_get_size(buf);
1745 iov_count = 1;
1746 }
1747
1748 if (state->conn->dispatch_incoming == NULL) {
1749 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1750 }
1751
1752 if (!smbXcli_req_set_pending(req)) {
1753 return NT_STATUS_NO_MEMORY;
1754 }
1755
1756 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1757
1758 subreq = writev_send(state, state->ev, state->conn->outgoing,
1759 state->conn->sock_fd, false, iov, iov_count);
1760 if (subreq == NULL) {
1761 return NT_STATUS_NO_MEMORY;
1762 }
1763 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1764 state->write_req = subreq;
1765
1766 return NT_STATUS_OK;
1767 }
1768
1769 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1770 struct tevent_context *ev,
1771 struct smbXcli_conn *conn,
1772 uint8_t smb_command,
1773 uint8_t additional_flags,
1774 uint8_t clear_flags,
1775 uint16_t additional_flags2,
1776 uint16_t clear_flags2,
1777 uint32_t timeout_msec,
1778 uint32_t pid,
1779 struct smbXcli_tcon *tcon,
1780 struct smbXcli_session *session,
1781 uint8_t wct, uint16_t *vwv,
1782 uint32_t num_bytes,
1783 const uint8_t *bytes)
1784 {
1785 struct tevent_req *req;
1786 struct iovec iov;
1787 NTSTATUS status;
1788
1789 iov.iov_base = discard_const_p(void, bytes);
1790 iov.iov_len = num_bytes;
1791
1792 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1793 additional_flags, clear_flags,
1794 additional_flags2, clear_flags2,
1795 timeout_msec,
1796 pid, tcon, session,
1797 wct, vwv, 1, &iov);
1798 if (req == NULL) {
1799 return NULL;
1800 }
1801 if (!tevent_req_is_in_progress(req)) {
1802 return tevent_req_post(req, ev);
1803 }
1804 status = smb1cli_req_chain_submit(&req, 1);
1805 if (tevent_req_nterror(req, status)) {
1806 return tevent_req_post(req, ev);
1807 }
1808 return req;
1809 }
1810
1811 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1812 {
1813 struct tevent_req *req =
1814 tevent_req_callback_data(subreq,
1815 struct tevent_req);
1816 struct smbXcli_req_state *state =
1817 tevent_req_data(req,
1818 struct smbXcli_req_state);
1819 ssize_t nwritten;
1820 int err;
1821
1822 state->write_req = NULL;
1823
1824 nwritten = writev_recv(subreq, &err);
1825 TALLOC_FREE(subreq);
1826 if (nwritten == -1) {
1827 /* here, we need to notify all pending requests */
1828 NTSTATUS status = map_nt_error_from_unix_common(err);
1829 smbXcli_conn_disconnect(state->conn, status);
1830 return;
1831 }
1832
1833 if (state->one_way) {
1834 state->inbuf = NULL;
1835 tevent_req_done(req);
1836 return;
1837 }
1838 }
1839
1840 static void smbXcli_conn_received(struct tevent_req *subreq)
1841 {
1842 struct smbXcli_conn *conn =
1843 tevent_req_callback_data(subreq,
1844 struct smbXcli_conn);
1845 TALLOC_CTX *frame = talloc_stackframe();
1846 NTSTATUS status;
1847 uint8_t *inbuf;
1848 ssize_t received;
1849 int err;
1850
1851 if (subreq != conn->read_smb_req) {
1852 DEBUG(1, ("Internal error: cli_smb_received called with "
1853 "unexpected subreq\n"));
1854 smbXcli_conn_disconnect(conn, NT_STATUS_INTERNAL_ERROR);
1855 TALLOC_FREE(frame);
1856 return;
1857 }
1858 conn->read_smb_req = NULL;
1859
1860 received = read_smb_recv(subreq, frame, &inbuf, &err);
1861 TALLOC_FREE(subreq);
1862 if (received == -1) {
1863 status = map_nt_error_from_unix_common(err);
1864 smbXcli_conn_disconnect(conn, status);
1865 TALLOC_FREE(frame);
1866 return;
1867 }
1868
1869 status = conn->dispatch_incoming(conn, frame, inbuf);
1870 TALLOC_FREE(frame);
1871 if (NT_STATUS_IS_OK(status)) {
1872 /*
1873 * We should not do any more processing
1874 * as the dispatch function called
1875 * tevent_req_done().
1876 */
1877 return;
1878 }
1879
1880 if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1881 /*
1882 * We got an error, so notify all pending requests
1883 */
1884 smbXcli_conn_disconnect(conn, status);
1885 return;
1886 }
1887
1888 /*
1889 * We got NT_STATUS_RETRY, so we may ask for a
1890 * next incoming pdu.
1891 */
1892 if (!smbXcli_conn_receive_next(conn)) {
1893 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1894 }
1895 }
1896
1897 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1898 struct iovec **piov, int *pnum_iov)
1899 {
1900 struct iovec *iov;
1901 int num_iov;
1902 size_t buflen;
1903 size_t taken;
1904 size_t remaining;
1905 uint8_t *hdr;
1906 uint8_t cmd;
1907 uint32_t wct_ofs;
1908 NTSTATUS status;
1909 size_t min_size = MIN_SMB_SIZE;
1910
1911 buflen = smb_len_tcp(buf);
1912 taken = 0;
1913
1914 hdr = buf + NBT_HDR_SIZE;
1915
1916 status = smb1cli_pull_raw_error(hdr);
1917 if (NT_STATUS_IS_ERR(status)) {
1918 /*
1919 * This is an ugly hack to support OS/2
1920 * which skips the byte_count in the DATA block
1921 * on some error responses.
1922 *
1923 * See bug #9096
1924 */
1925 min_size -= sizeof(uint16_t);
1926 }
1927
1928 if (buflen < min_size) {
1929 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1930 }
1931
1932 /*
1933 * This returns iovec elements in the following order:
1934 *
1935 * - SMB header
1936 *
1937 * - Parameter Block
1938 * - Data Block
1939 *
1940 * - Parameter Block
1941 * - Data Block
1942 *
1943 * - Parameter Block
1944 * - Data Block
1945 */
1946 num_iov = 1;
1947
1948 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1949 if (iov == NULL) {
1950 return NT_STATUS_NO_MEMORY;
1951 }
1952 iov[0].iov_base = hdr;
1953 iov[0].iov_len = HDR_WCT;
1954 taken += HDR_WCT;
1955
1956 cmd = CVAL(hdr, HDR_COM);
1957 wct_ofs = HDR_WCT;
1958
1959 while (true) {
1960 size_t len = buflen - taken;
1961 struct iovec *cur;
1962 struct iovec *iov_tmp;
1963 uint8_t wct;
1964 uint32_t bcc_ofs;
1965 uint16_t bcc;
1966 size_t needed;
1967
1968 /*
1969 * we need at least WCT
1970 */
1971 needed = sizeof(uint8_t);
1972 if (len < needed) {
1973 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1974 __location__, (int)len, (int)needed));
1975 goto inval;
1976 }
1977
1978 /*
1979 * Now we check if the specified words are there
1980 */
1981 wct = CVAL(hdr, wct_ofs);
1982 needed += wct * sizeof(uint16_t);
1983 if (len < needed) {
1984 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1985 __location__, (int)len, (int)needed));
1986 goto inval;
1987 }
1988
1989 if ((num_iov == 1) &&
1990 (len == needed) &&
1991 NT_STATUS_IS_ERR(status))
1992 {
1993 /*
1994 * This is an ugly hack to support OS/2
1995 * which skips the byte_count in the DATA block
1996 * on some error responses.
1997 *
1998 * See bug #9096
1999 */
2000 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
2001 num_iov + 2);
2002 if (iov_tmp == NULL) {
2003 TALLOC_FREE(iov);
2004 return NT_STATUS_NO_MEMORY;
2005 }
2006 iov = iov_tmp;
2007 cur = &iov[num_iov];
2008 num_iov += 2;
2009
2010 cur[0].iov_len = 0;
2011 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
2012 cur[1].iov_len = 0;
2013 cur[1].iov_base = cur[0].iov_base;
2014
2015 taken += needed;
2016 break;
2017 }
2018
2019 /*
2020 * we need at least BCC
2021 */
2022 needed += sizeof(uint16_t);
2023 if (len < needed) {
2024 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
2025 __location__, (int)len, (int)needed));
2026 goto inval;
2027 }
2028
2029 /*
2030 * Now we check if the specified bytes are there
2031 */
2032 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
2033 bcc = SVAL(hdr, bcc_ofs);
2034 needed += bcc * sizeof(uint8_t);
2035 if (len < needed) {
2036 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
2037 __location__, (int)len, (int)needed));
2038 goto inval;
2039 }
2040
2041 /*
2042 * we allocate 2 iovec structures for words and bytes
2043 */
2044 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
2045 num_iov + 2);
2046 if (iov_tmp == NULL) {
2047 TALLOC_FREE(iov);
2048 return NT_STATUS_NO_MEMORY;
2049 }
2050 iov = iov_tmp;
2051 cur = &iov[num_iov];
2052 num_iov += 2;
2053
2054 cur[0].iov_len = wct * sizeof(uint16_t);
2055 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
2056 cur[1].iov_len = bcc * sizeof(uint8_t);
2057 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
2058
2059 taken += needed;
2060
2061 if (!smb1cli_is_andx_req(cmd)) {
2062 /*
2063 * If the current command does not have AndX chanining
2064 * we are done.
2065 */
2066 break;
2067 }
2068
2069 if (wct == 0 && bcc == 0) {
2070 /*
2071 * An empty response also ends the chain,
2072 * most likely with an error.
2073 */
2074 break;
2075 }
2076
2077 if (wct < 2) {
2078 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
2079 __location__, (int)wct, (int)cmd));
2080 goto inval;
2081 }
2082 cmd = CVAL(cur[0].iov_base, 0);
2083 if (cmd == 0xFF) {
2084 /*
2085 * If it is the end of the chain we are also done.
2086 */
2087 break;
2088 }
2089 wct_ofs = SVAL(cur[0].iov_base, 2);
2090
2091 if (wct_ofs < taken) {
2092 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2093 }
2094 if (wct_ofs > buflen) {
2095 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2096 }
2097
2098 /*
2099 * we consumed everything up to the start of the next
2100 * parameter block.
2101 */
2102 taken = wct_ofs;
2103 }
2104
2105 remaining = buflen - taken;
2106
2107 if (remaining > 0 && num_iov >= 3) {
2108 /*
2109 * The last DATA block gets the remaining
2110 * bytes, this is needed to support
2111 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
2112 */
2113 iov[num_iov-1].iov_len += remaining;
2114 }
2115
2116 *piov = iov;
2117 *pnum_iov = num_iov;
2118 return NT_STATUS_OK;
2119
2120 inval:
2121 TALLOC_FREE(iov);
2122 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2123 }
2124
2125 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2126 TALLOC_CTX *tmp_mem,
2127 uint8_t *inbuf)
2128 {
2129 struct tevent_req *req;
2130 struct smbXcli_req_state *state;
2131 NTSTATUS status;
2132 size_t num_pending;
2133 size_t i;
2134 uint8_t cmd;
2135 uint16_t mid;
2136 bool oplock_break;
2137 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
2138 size_t len = smb_len_tcp(inbuf);
2139 struct iovec *iov = NULL;
2140 int num_iov = 0;
2141 struct tevent_req **chain = NULL;
2142 size_t num_chained = 0;
2143 size_t num_responses = 0;
2144
2145 if (conn->smb1.read_braw_req != NULL) {
2146 req = conn->smb1.read_braw_req;
2147 conn->smb1.read_braw_req = NULL;
2148 state = tevent_req_data(req, struct smbXcli_req_state);
2149
2150 smbXcli_req_unset_pending(req);
2151
2152 if (state->smb1.recv_iov == NULL) {
2153 /*
2154 * For requests with more than
2155 * one response, we have to readd the
2156 * recv_iov array.
2157 */
2158 state->smb1.recv_iov = talloc_zero_array(state,
2159 struct iovec,
2160 3);
2161 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2162 return NT_STATUS_OK;
2163 }
2164 }
2165
2166 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
2167 state->smb1.recv_iov[0].iov_len = len;
2168 ZERO_STRUCT(state->smb1.recv_iov[1]);
2169 ZERO_STRUCT(state->smb1.recv_iov[2]);
2170
2171 state->smb1.recv_cmd = SMBreadBraw;
2172 state->smb1.recv_status = NT_STATUS_OK;
2173 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2174
2175 tevent_req_done(req);
2176 return NT_STATUS_OK;
2177 }
2178
2179 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
2180 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
2181 DEBUG(10, ("Got non-SMB PDU\n"));
2182 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2183 }
2184
2185 /*
2186 * If we supported multiple encrytion contexts
2187 * here we'd look up based on tid.
2188 */
2189 if (common_encryption_on(conn->smb1.trans_enc)
2190 && (CVAL(inbuf, 0) == 0)) {
2191 uint16_t enc_ctx_num;
2192
2193 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
2194 if (!NT_STATUS_IS_OK(status)) {
2195 DEBUG(10, ("get_enc_ctx_num returned %s\n",
2196 nt_errstr(status)));
2197 return status;
2198 }
2199
2200 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
2201 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
2202 enc_ctx_num,
2203 conn->smb1.trans_enc->enc_ctx_num));
2204 return NT_STATUS_INVALID_HANDLE;
2205 }
2206
2207 status = common_decrypt_buffer(conn->smb1.trans_enc,
2208 (char *)inbuf);
2209 if (!NT_STATUS_IS_OK(status)) {
2210 DEBUG(10, ("common_decrypt_buffer returned %s\n",
2211 nt_errstr(status)));
2212 return status;
2213 }
2214 inhdr = inbuf + NBT_HDR_SIZE;
2215 len = smb_len_nbt(inbuf);
2216 }
2217
2218 mid = SVAL(inhdr, HDR_MID);
2219 num_pending = talloc_array_length(conn->pending);
2220
2221 for (i=0; i<num_pending; i++) {
2222 if (mid == smb1cli_req_mid(conn->pending[i])) {
2223 break;
2224 }
2225 }
2226 if (i == num_pending) {
2227 /* Dump unexpected reply */
2228 return NT_STATUS_RETRY;
2229 }
2230
2231 oplock_break = false;
2232
2233 if (mid == 0xffff) {
2234 /*
2235 * Paranoia checks that this is really an oplock break request.
2236 */
2237 oplock_break = (len == 51); /* hdr + 8 words */
2238 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
2239 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
2240 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
2241 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
2242
2243 if (!oplock_break) {
2244 /* Dump unexpected reply */
2245 return NT_STATUS_RETRY;
2246 }
2247 }
2248
2249 req = conn->pending[i];
2250 state = tevent_req_data(req, struct smbXcli_req_state);
2251
2252 if (!oplock_break /* oplock breaks are not signed */
2253 && !smb_signing_check_pdu(conn->smb1.signing,
2254 inhdr, len, state->smb1.seqnum+1)) {
2255 DEBUG(10, ("cli_check_sign_mac failed\n"));
2256 return NT_STATUS_ACCESS_DENIED;
2257 }
2258
2259 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
2260 &iov, &num_iov);
2261 if (!NT_STATUS_IS_OK(status)) {
2262 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
2263 nt_errstr(status)));
2264 return status;
2265 }
2266
2267 cmd = CVAL(inhdr, HDR_COM);
2268 status = smb1cli_pull_raw_error(inhdr);
2269
2270 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
2271 (state->session != NULL) && state->session->disconnect_expired)
2272 {
2273 /*
2274 * this should be a short term hack
2275 * until the upper layers have implemented
2276 * re-authentication.
2277 */
2278 return status;
2279 }
2280
2281 if (state->smb1.chained_requests == NULL) {
2282 if (num_iov != 3) {
2283 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2284 }
2285
2286 smbXcli_req_unset_pending(req);
2287
2288 if (state->smb1.recv_iov == NULL) {
2289 /*
2290 * For requests with more than
2291 * one response, we have to readd the
2292 * recv_iov array.
2293 */
2294 state->smb1.recv_iov = talloc_zero_array(state,
2295 struct iovec,
2296 3);
2297 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2298 return NT_STATUS_OK;
2299 }
2300 }
2301
2302 state->smb1.recv_cmd = cmd;
2303 state->smb1.recv_status = status;
2304 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2305
2306 state->smb1.recv_iov[0] = iov[0];
2307 state->smb1.recv_iov[1] = iov[1];
2308 state->smb1.recv_iov[2] = iov[2];
2309
2310 if (talloc_array_length(conn->pending) == 0) {
2311 tevent_req_done(req);
2312 return NT_STATUS_OK;
2313 }
2314
2315 tevent_req_defer_callback(req, state->ev);
2316 tevent_req_done(req);
2317 return NT_STATUS_RETRY;
2318 }
2319
2320 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2321 num_chained = talloc_array_length(chain);
2322 num_responses = (num_iov - 1)/2;
2323
2324 if (num_responses > num_chained) {
2325 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2326 }
2327
2328 for (i=0; i<num_chained; i++) {
2329 size_t iov_idx = 1 + (i*2);
2330 struct iovec *cur = &iov[iov_idx];
2331 uint8_t *inbuf_ref;
2332
2333 req = chain[i];
2334 state = tevent_req_data(req, struct smbXcli_req_state);
2335
2336 smbXcli_req_unset_pending(req);
2337
2338 /*
2339 * as we finish multiple requests here
2340 * we need to defer the callbacks as
2341 * they could destroy our current stack state.
2342 */
2343 tevent_req_defer_callback(req, state->ev);
2344
2345 if (i >= num_responses) {
2346 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2347 continue;
2348 }
2349
2350 if (state->smb1.recv_iov == NULL) {
2351 /*
2352 * For requests with more than
2353 * one response, we have to readd the
2354 * recv_iov array.
2355 */
2356 state->smb1.recv_iov = talloc_zero_array(state,
2357 struct iovec,
2358 3);
2359 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2360 continue;
2361 }
2362 }
2363
2364 state->smb1.recv_cmd = cmd;
2365
2366 if (i == (num_responses - 1)) {
2367 /*
2368 * The last request in the chain gets the status
2369 */
2370 state->smb1.recv_status = status;
2371 } else {
2372 cmd = CVAL(cur[0].iov_base, 0);
2373 state->smb1.recv_status = NT_STATUS_OK;
2374 }
2375
2376 state->inbuf = inbuf;
2377
2378 /*
2379 * Note: here we use talloc_reference() in a way
2380 * that does not expose it to the caller.
2381 */
2382 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2383 if (tevent_req_nomem(inbuf_ref, req)) {
2384 continue;
2385 }
2386
2387 /* copy the related buffers */
2388 state->smb1.recv_iov[0] = iov[0];
2389 state->smb1.recv_iov[1] = cur[0];
2390 state->smb1.recv_iov[2] = cur[1];
2391
2392 tevent_req_done(req);
2393 }
2394
2395 return NT_STATUS_RETRY;
2396 }
2397
2398 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2399 TALLOC_CTX *mem_ctx,
2400 struct iovec **piov,
2401 uint8_t **phdr,
2402 uint8_t *pwct,
2403 uint16_t **pvwv,
2404 uint32_t *pvwv_offset,
2405 uint32_t *pnum_bytes,
2406 uint8_t **pbytes,
2407 uint32_t *pbytes_offset,
2408 uint8_t **pinbuf,
2409 const struct smb1cli_req_expected_response *expected,
2410 size_t num_expected)
2411 {
2412 struct smbXcli_req_state *state =
2413 tevent_req_data(req,
2414 struct smbXcli_req_state);
2415 NTSTATUS status = NT_STATUS_OK;
2416 struct iovec *recv_iov = NULL;
2417 uint8_t *hdr = NULL;
2418 uint8_t wct = 0;
2419 uint32_t vwv_offset = 0;
2420 uint16_t *vwv = NULL;
2421 uint32_t num_bytes = 0;
2422 uint32_t bytes_offset = 0;
2423 uint8_t *bytes = NULL;
2424 size_t i;
2425 bool found_status = false;
2426 bool found_size = false;
2427
2428 if (piov != NULL) {
2429 *piov = NULL;
2430 }
2431 if (phdr != NULL) {
2432 *phdr = 0;
2433 }
2434 if (pwct != NULL) {
2435 *pwct = 0;
2436 }
2437 if (pvwv != NULL) {
2438 *pvwv = NULL;
2439 }
2440 if (pvwv_offset != NULL) {
2441 *pvwv_offset = 0;
2442 }
2443 if (pnum_bytes != NULL) {
2444 *pnum_bytes = 0;
2445 }
2446 if (pbytes != NULL) {
2447 *pbytes = NULL;
2448 }
2449 if (pbytes_offset != NULL) {
2450 *pbytes_offset = 0;
2451 }
2452 if (pinbuf != NULL) {
2453 *pinbuf = NULL;
2454 }
2455
2456 if (state->inbuf != NULL) {
2457 recv_iov = state->smb1.recv_iov;
2458 state->smb1.recv_iov = NULL;
2459 if (state->smb1.recv_cmd != SMBreadBraw) {
2460 hdr = (uint8_t *)recv_iov[0].iov_base;
2461 wct = recv_iov[1].iov_len/2;
2462 vwv = (uint16_t *)recv_iov[1].iov_base;
2463 vwv_offset = PTR_DIFF(vwv, hdr);
2464 num_bytes = recv_iov[2].iov_len;
2465 bytes = (uint8_t *)recv_iov[2].iov_base;
2466 bytes_offset = PTR_DIFF(bytes, hdr);
2467 }
2468 }
2469
2470 if (tevent_req_is_nterror(req, &status)) {
2471 for (i=0; i < num_expected; i++) {
2472 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2473 found_status = true;
2474 break;
2475 }
2476 }
2477
2478 if (found_status) {
2479 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2480 }
2481
2482 return status;
2483 }
2484
2485 if (num_expected == 0) {
2486 found_status = true;
2487 found_size = true;
2488 }
2489
2490 status = state->smb1.recv_status;
2491
2492 for (i=0; i < num_expected; i++) {
2493 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2494 continue;
2495 }
2496
2497 found_status = true;
2498 if (expected[i].wct == 0) {
2499 found_size = true;
2500 break;
2501 }
2502
2503 if (expected[i].wct == wct) {
2504 found_size = true;
2505 break;
2506 }
2507 }
2508
2509 if (!found_status) {
2510 return status;
2511 }
2512
2513 if (!found_size) {
2514 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2515 }
2516
2517 if (piov != NULL) {
2518 *piov = talloc_move(mem_ctx, &recv_iov);
2519 }
2520
2521 if (phdr != NULL) {
2522 *phdr = hdr;
2523 }
2524 if (pwct != NULL) {
2525 *pwct = wct;
2526 }
2527 if (pvwv != NULL) {
2528 *pvwv = vwv;
2529 }
2530 if (pvwv_offset != NULL) {
2531 *pvwv_offset = vwv_offset;
2532 }
2533 if (pnum_bytes != NULL) {
2534 *pnum_bytes = num_bytes;
2535 }
2536 if (pbytes != NULL) {
2537 *pbytes = bytes;
2538 }
2539 if (pbytes_offset != NULL) {
2540 *pbytes_offset = bytes_offset;
2541 }
2542 if (pinbuf != NULL) {
2543 *pinbuf = state->inbuf;
2544 }
2545
2546 return status;
2547 }
2548
2549 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2550 {
2551 size_t wct_ofs;
2552 int i;
2553
2554 wct_ofs = HDR_WCT;
2555
2556 for (i=0; i<num_reqs; i++) {
2557 struct smbXcli_req_state *state;
2558 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2559 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2560 state->smb1.iov_count-2);
2561 wct_ofs = (wct_ofs + 3) & ~3;
2562 }
2563 return wct_ofs;
2564 }
2565
2566 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2567 {
2568 struct smbXcli_req_state *first_state =
2569 tevent_req_data(reqs[0],
2570 struct smbXcli_req_state);
2571 struct smbXcli_req_state *state;
2572 size_t wct_offset;
2573 size_t chain_padding = 0;
2574 int i, iovlen;
2575 struct iovec *iov = NULL;
2576 struct iovec *this_iov;
2577 NTSTATUS status;
2578 ssize_t nbt_len;
2579
2580 if (num_reqs == 1) {
2581 return smb1cli_req_writev_submit(reqs[0], first_state,
2582 first_state->smb1.iov,
2583 first_state->smb1.iov_count);
2584 }
2585
2586 iovlen = 0;
2587 for (i=0; i<num_reqs; i++) {
2588 if (!tevent_req_is_in_progress(reqs[i])) {
2589 return NT_STATUS_INTERNAL_ERROR;
2590 }
2591
2592 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2593
2594 if (state->smb1.iov_count < 4) {
2595 return NT_STATUS_INVALID_PARAMETER_MIX;
2596 }
2597
2598 if (i == 0) {
2599 /*
2600 * The NBT and SMB header
2601 */
2602 iovlen += 2;
2603 } else {
2604 /*
2605 * Chain padding
2606 */
2607 iovlen += 1;
2608 }
2609
2610 /*
2611 * words and bytes
2612 */
2613 iovlen += state->smb1.iov_count - 2;
2614 }
2615
2616 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2617 if (iov == NULL) {
2618 return NT_STATUS_NO_MEMORY;
2619 }
2620
2621 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2622 first_state, reqs, sizeof(*reqs) * num_reqs);
2623 if (first_state->smb1.chained_requests == NULL) {
2624 TALLOC_FREE(iov);
2625 return NT_STATUS_NO_MEMORY;
2626 }
2627
2628 wct_offset = HDR_WCT;
2629 this_iov = iov;
2630
2631 for (i=0; i<num_reqs; i++) {
2632 size_t next_padding = 0;
2633 uint16_t *vwv;
2634
2635 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2636
2637 if (i < num_reqs-1) {
2638 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2639 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2640 TALLOC_FREE(iov);
2641 TALLOC_FREE(first_state->smb1.chained_requests);
2642 return NT_STATUS_INVALID_PARAMETER_MIX;
2643 }
2644 }
2645
2646 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2647 state->smb1.iov_count-2) + 1;
2648 if ((wct_offset % 4) != 0) {
2649 next_padding = 4 - (wct_offset % 4);
2650 }
2651 wct_offset += next_padding;
2652 vwv = state->smb1.vwv;
2653
2654 if (i < num_reqs-1) {
2655 struct smbXcli_req_state *next_state =
2656 tevent_req_data(reqs[i+1],
2657 struct smbXcli_req_state);
2658 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2659 SCVAL(vwv+0, 1, 0);
2660 SSVAL(vwv+1, 0, wct_offset);
2661 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2662 /* properly end the chain */
2663 SCVAL(vwv+0, 0, 0xff);
2664 SCVAL(vwv+0, 1, 0xff);
2665 SSVAL(vwv+1, 0, 0);
2666 }
2667
2668 if (i == 0) {
2669 /*
2670 * The NBT and SMB header
2671 */
2672 this_iov[0] = state->smb1.iov[0];
2673 this_iov[1] = state->smb1.iov[1];
2674 this_iov += 2;
2675 } else {
2676 /*
2677 * This one is a bit subtle. We have to add
2678 * chain_padding bytes between the requests, and we
2679 * have to also include the wct field of the
2680 * subsequent requests. We use the subsequent header
2681 * for the padding, it contains the wct field in its
2682 * last byte.
2683 */
2684 this_iov[0].iov_len = chain_padding+1;
2685 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2686 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2687 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2688 this_iov += 1;
2689 }
2690
2691 /*
2692 * copy the words and bytes
2693 */
2694 memcpy(this_iov, state->smb1.iov+2,
2695 sizeof(struct iovec) * (state->smb1.iov_count-2));
2696 this_iov += state->smb1.iov_count - 2;
2697 chain_padding = next_padding;
2698 }
2699
2700 nbt_len = iov_buflen(&iov[1], iovlen-1);
2701 if ((nbt_len == -1) || (nbt_len > first_state->conn->smb1.max_xmit)) {
2702 TALLOC_FREE(iov);
2703 TALLOC_FREE(first_state->smb1.chained_requests);
2704 return NT_STATUS_INVALID_PARAMETER_MIX;
2705 }
2706
2707 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2708 if (!NT_STATUS_IS_OK(status)) {
2709 TALLOC_FREE(iov);
2710 TALLOC_FREE(first_state->smb1.chained_requests);
2711 return status;
2712 }
2713
2714 return NT_STATUS_OK;
2715 }
2716
2717 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2718 {
2719 return ((tevent_queue_length(conn->outgoing) != 0)
2720 || (talloc_array_length(conn->pending) != 0));
2721 }
2722
2723 bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn)
2724 {
2725 if (conn->protocol >= PROTOCOL_SMB2_02) {
2726 return (smb2cli_conn_server_capabilities(conn) & SMB2_CAP_DFS);
2727 }
2728
2729 return (smb1cli_conn_capabilities(conn) & CAP_DFS);
2730 }
2731
2732 bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
2733 {
2734 uint16_t credits = 1;
2735
2736 if (conn->smb2.cur_credits == 0) {
2737 if (max_dyn_len != NULL) {
2738 *max_dyn_len = 0;
2739 }
2740 return false;
2741 }
2742
2743 if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2744 credits = conn->smb2.cur_credits;
2745 }
2746
2747 if (max_dyn_len != NULL) {
2748 *max_dyn_len = credits * 65536;
2749 }
2750
2751 return true;
2752 }
2753
2754 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2755 {
2756 return conn->smb2.server.capabilities;
2757 }
2758
2759 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2760 {
2761 return conn->smb2.server.security_mode;
2762 }
2763
2764 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2765 {
2766 return conn->smb2.server.max_trans_size;
2767 }
2768
2769 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2770 {
2771 return conn->smb2.server.max_read_size;
2772 }
2773
2774 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2775 {
2776 return conn->smb2.server.max_write_size;
2777 }
2778
2779 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2780 uint16_t max_credits)
2781 {
2782 conn->smb2.max_credits = max_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 {
4097 struct tevent_req *req, *subreq;
4098 struct smbXcli_negprot_state *state;
4099
4100 req = tevent_req_create(mem_ctx, &state,
4101 struct smbXcli_negprot_state);
4102 if (req == NULL) {
4103 return NULL;
4104 }
4105 state->conn = conn;
4106 state->ev = ev;
4107 state->timeout_msec = timeout_msec;
4108
4109 if (min_protocol == PROTOCOL_NONE) {
4110 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
4111 return tevent_req_post(req, ev);
4112 }
4113
4114 if (max_protocol == PROTOCOL_NONE) {
4115 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
4116 return tevent_req_post(req, ev);
4117 }
4118
4119 if (min_protocol > max_protocol) {
4120 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
4121 return tevent_req_post(req, ev);
4122 }
4123
4124 conn->min_protocol = min_protocol;
4125 conn->max_protocol = max_protocol;
4126 conn->protocol = PROTOCOL_NONE;
4127
4128 if ((min_protocol < PROTOCOL_SMB2_02) &&
4129 (max_protocol < PROTOCOL_SMB2_02)) {
4130 /*
4131 * SMB1 only...
4132 */
4133 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4134
4135 subreq = smbXcli_negprot_smb1_subreq(state);
4136 if (tevent_req_nomem(subreq, req)) {
4137 return tevent_req_post(req, ev);
4138 }
4139 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4140 return req;
4141 }
4142
4143 if ((min_protocol >= PROTOCOL_SMB2_02) &&
4144 (max_protocol >= PROTOCOL_SMB2_02)) {
4145 /*
4146 * SMB2 only...
4147 */
4148 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4149
4150 /*
4151 * As we're starting with an SMB2 negprot, emulate Windows
4152 * and ask for 31 credits in the initial SMB2 negprot.
4153 * If we don't and leave requested credits at
4154 * zero, MacOSX servers return zero credits on
4155 * the negprot reply and we fail to connect.
4156 */
4157 smb2cli_conn_set_max_credits(conn,
4158 WINDOWS_CLIENT_PURE_SMB2_NEGPROT_INITIAL_CREDIT_ASK);
4159
4160 subreq = smbXcli_negprot_smb2_subreq(state);
4161 if (tevent_req_nomem(subreq, req)) {
4162 return tevent_req_post(req, ev);
4163 }
4164 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4165 return req;
4166 }
4167
4168 /*
4169 * We send an SMB1 negprot with the SMB2 dialects
4170 * and expect a SMB1 or a SMB2 response.
4171 *
4172 * smbXcli_negprot_dispatch_incoming() will fix the
4173 * callback to match protocol of the response.
4174 */
4175 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
4176
4177 subreq = smbXcli_negprot_smb1_subreq(state);
4178 if (tevent_req_nomem(subreq, req)) {
4179 return tevent_req_post(req, ev);
4180 }
4181 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
4182 return req;
4183 }
4184
4185 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
4186 {
4187 struct tevent_req *req =
4188 tevent_req_callback_data(subreq,
4189 struct tevent_req);
4190 NTSTATUS status;
4191
4192 /*
4193 * we just want the low level error
4194 */
4195 status = tevent_req_simple_recv_ntstatus(subreq);
4196 TALLOC_FREE(subreq);
4197 if (tevent_req_nterror(req, status)) {
4198 return;
4199 }
4200
4201 /* this should never happen */
4202 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
4203 }
4204
4205 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
4206 {
4207 size_t i;
4208 DATA_BLOB bytes = data_blob_null;
4209 uint8_t flags;
4210 uint16_t flags2;
4211
4212 /* setup the protocol strings */
4213 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4214 uint8_t c = 2;
4215 bool ok;
4216
4217 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4218 continue;
4219 }
4220
4221 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4222 continue;
4223 }
4224
4225 ok = data_blob_append(state, &bytes, &c, sizeof(c));
4226 if (!ok) {
4227 return NULL;
4228 }
4229
4230 /*
4231 * We now it is already ascii and
4232 * we want NULL termination.
4233 */
4234 ok = data_blob_append(state, &bytes,
4235 smb1cli_prots[i].smb1_name,
4236 strlen(smb1cli_prots[i].smb1_name)+1);
4237 if (!ok) {
4238 return NULL;
4239 }
4240 }
4241
4242 smb1cli_req_flags(state->conn->max_protocol,
4243 state->conn->smb1.client.capabilities,
4244 SMBnegprot,
4245 0, 0, &flags,
4246 0, 0, &flags2);
4247
4248 return smb1cli_req_send(state, state->ev, state->conn,
4249 SMBnegprot,
4250 flags, ~flags,
4251 flags2, ~flags2,
4252 state->timeout_msec,
4253 0xFFFE, 0, NULL, /* pid, tid, session */
4254 0, NULL, /* wct, vwv */
4255 bytes.length, bytes.data);
4256 }
4257
4258 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
4259 {
4260 struct tevent_req *req =
4261 tevent_req_callback_data(subreq,
4262 struct tevent_req);
4263 struct smbXcli_negprot_state *state =
4264 tevent_req_data(req,
4265 struct smbXcli_negprot_state);
4266 struct smbXcli_conn *conn = state->conn;
4267 struct iovec *recv_iov = NULL;
4268 uint8_t *inhdr;
4269 uint8_t wct;
4270 uint16_t *vwv;
4271 uint32_t num_bytes;
4272 uint8_t *bytes;
4273 NTSTATUS status;
4274 uint16_t protnum;
4275 size_t i;
4276 size_t num_prots = 0;
4277 uint8_t flags;
4278 uint32_t client_capabilities = conn->smb1.client.capabilities;
4279 uint32_t both_capabilities;
4280 uint32_t server_capabilities = 0;
4281 uint32_t capabilities;
4282 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
4283 uint32_t server_max_xmit = 0;
4284 uint32_t max_xmit;
4285 uint32_t server_max_mux = 0;
4286 uint16_t server_security_mode = 0;
4287 uint32_t server_session_key = 0;
4288 bool server_readbraw = false;
4289 bool server_writebraw = false;
4290 bool server_lockread = false;
4291 bool server_writeunlock = false;
4292 struct GUID server_guid = GUID_zero();
4293 DATA_BLOB server_gss_blob = data_blob_null;
4294 uint8_t server_challenge[8];
4295 char *server_workgroup = NULL;
4296 char *server_name = NULL;
4297 int server_time_zone = 0;
4298 NTTIME server_system_time = 0;
4299 static const struct smb1cli_req_expected_response expected[] = {
4300 {
4301 .status = NT_STATUS_OK,
4302 .wct = 0x11, /* NT1 */
4303 },
4304 {
4305 .status = NT_STATUS_OK,
4306 .wct = 0x0D, /* LM */
4307 },
4308 {
4309 .status = NT_STATUS_OK,
4310 .wct = 0x01, /* CORE */
4311 }
4312 };
4313
4314 ZERO_STRUCT(server_challenge);
4315
4316 status = smb1cli_req_recv(subreq, state,
4317 &recv_iov,
4318 &inhdr,
4319 &wct,
4320 &vwv,
4321 NULL, /* pvwv_offset */
4322 &num_bytes,
4323 &bytes,
4324 NULL, /* pbytes_offset */
4325 NULL, /* pinbuf */
4326 expected, ARRAY_SIZE(expected));
4327 TALLOC_FREE(subreq);
4328 if (tevent_req_nterror(req, status)) {
4329 return;
4330 }
4331
4332 flags = CVAL(inhdr, HDR_FLG);
4333
4334 protnum = SVAL(vwv, 0);
4335
4336 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4337 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4338 continue;
4339 }
4340
4341 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4342 continue;
4343 }
4344
4345 if (protnum != num_prots) {
4346 num_prots++;
4347 continue;
4348 }
4349
4350 conn->protocol = smb1cli_prots[i].proto;
4351 break;
4352 }
4353
4354 if (conn->protocol == PROTOCOL_NONE) {
4355 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4356 return;
4357 }
4358
4359 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
4360 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
4361 "and the selected protocol level doesn't support it.\n"));
4362 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4363 return;
4364 }
4365
4366 if (flags & FLAG_SUPPORT_LOCKREAD) {
4367 server_lockread = true;
4368 server_writeunlock = true;
4369 }
4370
4371 if (conn->protocol >= PROTOCOL_NT1) {
4372 const char *client_signing = NULL;
4373 bool server_mandatory = false;
4374 bool server_allowed = false;
4375 const char *server_signing = NULL;
4376 bool ok;
4377 uint8_t key_len;
4378
4379 if (wct != 0x11) {
4380 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4381 return;
4382 }
4383
4384 /* NT protocol */
4385 server_security_mode = CVAL(vwv + 1, 0);
4386 server_max_mux = SVAL(vwv + 1, 1);
4387 server_max_xmit = IVAL(vwv + 3, 1);
4388 server_session_key = IVAL(vwv + 7, 1);
4389 server_time_zone = SVALS(vwv + 15, 1);
4390 server_time_zone *= 60;
4391 /* this time arrives in real GMT */
4392 server_system_time = BVAL(vwv + 11, 1);
4393 server_capabilities = IVAL(vwv + 9, 1);
4394
4395 key_len = CVAL(vwv + 16, 1);
4396
4397 if (server_capabilities & CAP_RAW_MODE) {
4398 server_readbraw = true;
4399 server_writebraw = true;
4400 }
4401 if (server_capabilities & CAP_LOCK_AND_READ) {
4402 server_lockread = true;
4403 }
4404
4405 if (server_capabilities & CAP_EXTENDED_SECURITY) {
4406 DATA_BLOB blob1, blob2;
4407
4408 if (num_bytes < 16) {
4409 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4410 return;
4411 }
4412
4413 blob1 = data_blob_const(bytes, 16);
4414 status = GUID_from_data_blob(&blob1, &server_guid);
4415 if (tevent_req_nterror(req, status)) {
4416 return;
4417 }
4418
4419 blob1 = data_blob_const(bytes+16, num_bytes-16);
4420 blob2 = data_blob_dup_talloc(state, blob1);
4421 if (blob1.length > 0 &&
4422 tevent_req_nomem(blob2.data, req)) {
4423 return;
4424 }
4425 server_gss_blob = blob2;
4426 } else {
4427 DATA_BLOB blob1, blob2;
4428
4429 if (num_bytes < key_len) {
4430 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4431 return;
4432 }
4433
4434 if (key_len != 0 && key_len != 8) {
4435 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4436 return;
4437 }
4438
4439 if (key_len == 8) {
4440 memcpy(server_challenge, bytes, 8);
4441 }
4442
4443 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4444 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
4445 if (blob1.length > 0) {
4446 size_t len;
4447
4448 len = utf16_len_n(blob1.data,
4449 blob1.length);
4450 blob1.length = len;
4451
4452 ok = convert_string_talloc(state,
4453 CH_UTF16LE,
4454 CH_UNIX,
4455 blob1.data,
4456 blob1.length,
4457 &server_workgroup,
4458 &len);
4459 if (!ok) {
4460 status = map_nt_error_from_unix_common(errno);
4461 tevent_req_nterror(req, status);
4462 return;
4463 }
4464 }
4465
4466 blob2.data += blob1.length;
4467 blob2.length -= blob1.length;
4468 if (blob2.length > 0) {
4469 size_t len;
4470
4471 len = utf16_len_n(blob1.data,
4472 blob1.length);
4473 blob1.length = len;
4474
4475 ok = convert_string_talloc(state,
4476 CH_UTF16LE,
4477 CH_UNIX,
4478 blob2.data,
4479 blob2.length,
4480 &server_name,
4481 &len);
4482 if (!ok) {
4483 status = map_nt_error_from_unix_common(errno);
4484 tevent_req_nterror(req, status);
4485 return;
4486 }
4487 }
4488 }
4489
4490 client_signing = "disabled";
4491 if (conn->allow_signing) {
4492 client_signing = "allowed";
4493 }
4494 if (conn->mandatory_signing) {
4495 client_signing = "required";
4496 }
4497
4498 server_signing = "not supported";
4499 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4500 server_signing = "supported";
4501 server_allowed = true;
4502 } else if (conn->mandatory_signing) {
4503 /*
4504 * We have mandatory signing as client
4505 * lets assume the server will look at our
4506 * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4507 * flag in the session setup
4508 */
4509 server_signing = "not announced";
4510 server_allowed = true;
4511 }
4512 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4513 server_signing = "required";
4514 server_mandatory = true;
4515 }
4516
4517 ok = smb_signing_set_negotiated(conn->smb1.signing,
4518 server_allowed,
4519 server_mandatory);
4520 if (!ok) {
4521 DEBUG(1,("cli_negprot: SMB signing is required, "
4522 "but client[%s] and server[%s] mismatch\n",
4523 client_signing, server_signing));
4524 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4525 return;
4526 }
4527
4528 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4529 DATA_BLOB blob1;
4530 uint8_t key_len;
4531 time_t t;
4532
4533 if (wct != 0x0D) {
4534 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4535 return;
4536 }
4537
4538 server_security_mode = SVAL(vwv + 1, 0);
4539 server_max_xmit = SVAL(vwv + 2, 0);
4540 server_max_mux = SVAL(vwv + 3, 0);
4541 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4542 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4543 server_session_key = IVAL(vwv + 6, 0);
4544 server_time_zone = SVALS(vwv + 10, 0);
4545 server_time_zone *= 60;
4546 /* this time is converted to GMT by make_unix_date */
4547 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4548 unix_to_nt_time(&server_system_time, t);
4549 key_len = SVAL(vwv + 11, 0);
4550
4551 if (num_bytes < key_len) {
4552 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4553 return;
4554 }
4555
4556 if (key_len != 0 && key_len != 8) {
4557 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4558 return;
4559 }
4560
4561 if (key_len == 8) {
4562 memcpy(server_challenge, bytes, 8);
4563 }
4564
4565 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4566 if (blob1.length > 0) {
4567 size_t len;
4568 bool ok;
4569
4570 len = utf16_len_n(blob1.data,
4571 blob1.length);
4572 blob1.length = len;
4573
4574 ok = convert_string_talloc(state,
4575 CH_DOS,
4576 CH_UNIX,
4577 blob1.data,
4578 blob1.length,
4579 &server_workgroup,
4580 &len);
4581 if (!ok) {
4582 status = map_nt_error_from_unix_common(errno);
4583 tevent_req_nterror(req, status);
4584 return;
4585 }
4586 }
4587
4588 } else {
4589 /* the old core protocol */
4590 server_time_zone = get_time_zone(time(NULL));
4591 server_max_xmit = 1024;
4592 server_max_mux = 1;
4593 }
4594
4595 if (server_max_xmit < 1024) {
4596 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4597 return;
4598 }
4599
4600 if (server_max_mux < 1) {
4601 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4602 return;
4603 }
4604
4605 /*
4606 * Now calculate the negotiated capabilities
4607 * based on the mask for:
4608 * - client only flags
4609 * - flags used in both directions
4610 * - server only flags
4611 */
4612 both_capabilities = client_capabilities & server_capabilities;
4613 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4614 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4615 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4616
4617 max_xmit = MIN(client_max_xmit, server_max_xmit);
4618
4619 conn->smb1.server.capabilities = server_capabilities;
4620 conn->smb1.capabilities = capabilities;
4621
4622 conn->smb1.server.max_xmit = server_max_xmit;
4623 conn->smb1.max_xmit = max_xmit;
4624
4625 conn->smb1.server.max_mux = server_max_mux;
4626
4627 conn->smb1.server.security_mode = server_security_mode;
4628
4629 conn->smb1.server.readbraw = server_readbraw;
4630 conn->smb1.server.writebraw = server_writebraw;
4631 conn->smb1.server.lockread = server_lockread;
4632 conn->smb1.server.writeunlock = server_writeunlock;
4633
4634 conn->smb1.server.session_key = server_session_key;
4635
4636 talloc_steal(conn, server_gss_blob.data);
4637 conn->smb1.server.gss_blob = server_gss_blob;
4638 conn->smb1.server.guid = server_guid;
4639 memcpy(conn->smb1.server.challenge, server_challenge, 8);
4640 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4641 conn->smb1.server.name = talloc_move(conn, &server_name);
4642
4643 conn->smb1.server.time_zone = server_time_zone;
4644 conn->smb1.server.system_time = server_system_time;
4645
4646 tevent_req_done(req);
4647 }
4648
4649 static size_t smbXcli_padding_helper(uint32_t offset, size_t n)
4650 {
4651 if ((offset & (n-1)) == 0) return 0;
4652 return n - (offset & (n-1));
4653 }
4654
4655 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4656 {
4657 size_t i;
4658 uint8_t *buf;
4659 uint16_t dialect_count = 0;
4660 DATA_BLOB dyn = data_blob_null;
4661
4662 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4663 bool ok;
4664 uint8_t val[2];
4665
4666 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4667 continue;
4668 }
4669
4670 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4671 continue;
4672 }
4673
4674 SSVAL(val, 0, smb2cli_prots[i].smb2_dialect);
4675
4676 ok = data_blob_append(state, &dyn, val, sizeof(val));
4677 if (!ok) {
4678 return NULL;
4679 }
4680
4681 dialect_count++;
4682 }
4683
4684 buf = state->smb2.fixed;
4685 SSVAL(buf, 0, 36);
4686 SSVAL(buf, 2, dialect_count);
4687 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4688 SSVAL(buf, 6, 0); /* Reserved */
4689 if (state->conn->max_protocol >= PROTOCOL_SMB2_22) {
4690 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4691 } else {
4692 SIVAL(buf, 8, 0); /* Capabilities */
4693 }
4694 if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
4695 NTSTATUS status;
4696 DATA_BLOB blob;
4697
4698 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4699 state, &blob);
4700 if (!NT_STATUS_IS_OK(status)) {
4701 return NULL;
4702 }
4703 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4704 } else {
4705 memset(buf+12, 0, 16); /* ClientGuid */
4706 }
4707
4708 if (state->conn->max_protocol >= PROTOCOL_SMB3_10) {
4709 NTSTATUS status;
4710 struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4711 uint32_t offset;
4712 DATA_BLOB b;
4713 uint8_t p[38];
4714 const uint8_t zeros[8] = {0, };
4715 size_t pad;
4716 bool ok;
4717
4718 SSVAL(p, 0, 1); /* HashAlgorithmCount */
4719 SSVAL(p, 2, 32); /* SaltLength */
4720 SSVAL(p, 4, SMB2_PREAUTH_INTEGRITY_SHA512);
4721 generate_random_buffer(p + 6, 32);
4722
4723 b = data_blob_const(p, 38);
4724 status = smb2_negotiate_context_add(state, &c,
4725 SMB2_PREAUTH_INTEGRITY_CAPABILITIES, b);
4726 if (!NT_STATUS_IS_OK(status)) {
4727 return NULL;
4728 }
4729
4730 SSVAL(p, 0, 2); /* ChiperCount */
4731 /*
4732 * For now we preferr CCM because our implementation
4733 * is faster than GCM, see bug #11451.
4734 */
4735 SSVAL(p, 2, SMB2_ENCRYPTION_AES128_CCM);
4736 SSVAL(p, 4, SMB2_ENCRYPTION_AES128_GCM);
4737
4738 b = data_blob_const(p, 6);
4739 status = smb2_negotiate_context_add(state, &c,
4740 SMB2_ENCRYPTION_CAPABILITIES, b);
4741 if (!NT_STATUS_IS_OK(status)) {
4742 return NULL;
4743 }
4744
4745 status = smb2_negotiate_context_push(state, &b, c);
4746 if (!NT_STATUS_IS_OK(status)) {
4747 return NULL;
4748 }
4749
4750 offset = SMB2_HDR_BODY + sizeof(state->smb2.fixed) + dyn.length;
4751 pad = smbXcli_padding_helper(offset, 8);
4752
4753 ok = data_blob_append(state, &dyn, zeros, pad);
4754 if (!ok) {
4755 return NULL;
4756 }
4757 offset += pad;
4758
4759 ok = data_blob_append(state, &dyn, b.data, b.length);
4760 if (!ok) {
4761 return NULL;
4762 }
4763
4764 SIVAL(buf, 28, offset); /* NegotiateContextOffset */
4765 SSVAL(buf, 32, c.num_contexts); /* NegotiateContextCount */
4766 SSVAL(buf, 34, 0); /* Reserved */
4767 } else {
4768 SBVAL(buf, 28, 0); /* Reserved/ClientStartTime */
4769 }
4770
4771 return smb2cli_req_send(state, state->ev,
4772 state->conn, SMB2_OP_NEGPROT,
4773 0, 0, /* flags */
4774 state->timeout_msec,
4775 NULL, NULL, /* tcon, session */
4776 state->smb2.fixed, sizeof(state->smb2.fixed),
4777 dyn.data, dyn.length,
4778 UINT16_MAX); /* max_dyn_len */
4779 }
4780
4781 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4782 {
4783 struct tevent_req *req =
4784 tevent_req_callback_data(subreq,
4785 struct tevent_req);
4786 struct smbXcli_negprot_state *state =
4787 tevent_req_data(req,
4788 struct smbXcli_negprot_state);
4789 struct smbXcli_conn *conn = state->conn;
4790 size_t security_offset, security_length;
4791 DATA_BLOB blob;
4792 NTSTATUS status;
4793 struct iovec *iov;
4794 uint8_t *body;
4795 size_t i;
4796 uint16_t dialect_revision;
4797 struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4798 uint32_t negotiate_context_offset = 0;
4799 uint16_t negotiate_context_count = 0;
4800 DATA_BLOB negotiate_context_blob = data_blob_null;
4801 size_t avail;
4802 size_t ctx_ofs;
4803 size_t needed;
4804 struct smb2_negotiate_context *preauth = NULL;
4805 uint16_t hash_count;
4806 uint16_t salt_length;
4807 uint16_t hash_selected;
4808 struct hc_sha512state sctx;
4809 struct smb2_negotiate_context *cipher = NULL;
4810 struct iovec sent_iov[3];
4811 static const struct smb2cli_req_expected_response expected[] = {
4812 {
4813 .status = NT_STATUS_OK,
4814 .body_size = 0x41
4815 }
4816 };
4817
4818 status = smb2cli_req_recv(subreq, state, &iov,
4819 expected, ARRAY_SIZE(expected));
4820 if (tevent_req_nterror(req, status)) {
4821 return;
4822 }
4823
4824 body = (uint8_t *)iov[1].iov_base;
4825
4826 dialect_revision = SVAL(body, 4);
4827
4828 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4829 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4830 continue;
4831 }
4832
4833 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4834 continue;
4835 }
4836
4837 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4838 continue;
4839 }
4840
4841 conn->protocol = smb2cli_prots[i].proto;
4842 break;
4843 }
4844
4845 if (conn->protocol == PROTOCOL_NONE) {
4846 TALLOC_FREE(subreq);
4847
4848 if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
4849 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4850 return;
4851 }
4852
4853 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4854 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4855 return;
4856 }
4857
4858 /* make sure we do not loop forever */
4859 state->conn->min_protocol = PROTOCOL_SMB2_02;
4860
4861 /*
4862 * send a SMB2 negprot, in order to negotiate
4863 * the SMB2 dialect.
4864 */
4865 subreq = smbXcli_negprot_smb2_subreq(state);
4866 if (tevent_req_nomem(subreq, req)) {
4867 return;
4868 }
4869 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4870 return;
4871 }
4872
4873 conn->smb2.server.security_mode = SVAL(body, 2);
4874 if (conn->protocol >= PROTOCOL_SMB3_10) {
4875 negotiate_context_count = SVAL(body, 6);
4876 }
4877
4878 blob = data_blob_const(body + 8, 16);
4879 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4880 if (tevent_req_nterror(req, status)) {
4881 return;
4882 }
4883
4884 conn->smb2.server.capabilities = IVAL(body, 24);
4885 conn->smb2.server.max_trans_size= IVAL(body, 28);
4886 conn->smb2.server.max_read_size = IVAL(body, 32);
4887 conn->smb2.server.max_write_size= IVAL(body, 36);
4888 conn->smb2.server.system_time = BVAL(body, 40);
4889 conn->smb2.server.start_time = BVAL(body, 48);
4890
4891 security_offset = SVAL(body, 56);
4892 security_length = SVAL(body, 58);
4893
4894 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4895 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4896 return;
4897 }
4898
4899 if (security_length > iov[2].iov_len) {
4900 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4901 return;
4902 }
4903
4904 conn->smb2.server.gss_blob = data_blob_talloc(conn,
4905 iov[2].iov_base,
4906 security_length);
4907 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4908 return;
4909 }
4910
4911 if (conn->protocol < PROTOCOL_SMB3_10) {
4912 TALLOC_FREE(subreq);
4913
4914 if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
4915 conn->smb2.server.cipher = SMB2_ENCRYPTION_AES128_CCM;
4916 }
4917 tevent_req_done(req);
4918 return;
4919 }
4920
4921 if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
4922 tevent_req_nterror(req,
4923 NT_STATUS_INVALID_NETWORK_RESPONSE);
4924 return;
4925 }
4926
4927 negotiate_context_offset = IVAL(body, 60);
4928 if (negotiate_context_offset < security_offset) {
4929 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4930 return;
4931 }
4932
4933 ctx_ofs = negotiate_context_offset - security_offset;
4934 if (ctx_ofs > iov[2].iov_len) {
4935 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4936 return;
4937 }
4938 avail = iov[2].iov_len - security_length;
4939 needed = iov[2].iov_len - ctx_ofs;
4940 if (needed > avail) {
4941 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4942 return;
4943 }
4944
4945 negotiate_context_blob.data = (uint8_t *)iov[2].iov_base;
4946 negotiate_context_blob.length = iov[2].iov_len;
4947
4948 negotiate_context_blob.data += ctx_ofs;
4949 negotiate_context_blob.length -= ctx_ofs;
4950
4951 status = smb2_negotiate_context_parse(state, negotiate_context_blob, &c);
4952 if (tevent_req_nterror(req, status)) {
4953 return;
4954 }
4955
4956 if (negotiate_context_count != c.num_contexts) {
4957 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4958 return;
4959 }
4960
4961 preauth = smb2_negotiate_context_find(&c,
4962 SMB2_PREAUTH_INTEGRITY_CAPABILITIES);
4963 if (preauth == NULL) {
4964 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4965 return;
4966 }
4967
4968 if (preauth->data.length < 6) {
4969 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4970 return;
4971 }
4972
4973 hash_count = SVAL(preauth->data.data, 0);
4974 salt_length = SVAL(preauth->data.data, 2);
4975 hash_selected = SVAL(preauth->data.data, 4);
4976
4977 if (hash_count != 1) {
4978 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4979 return;
4980 }
4981
4982 if (preauth->data.length != (6 + salt_length)) {
4983 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4984 return;
4985 }
4986
4987 if (hash_selected != SMB2_PREAUTH_INTEGRITY_SHA512) {
4988 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4989 return;
4990 }
4991
4992 cipher = smb2_negotiate_context_find(&c, SMB2_ENCRYPTION_CAPABILITIES);
4993 if (cipher != NULL) {
4994 uint16_t cipher_count;
4995
4996 if (cipher->data.length < 2) {
4997 tevent_req_nterror(req,
4998 NT_STATUS_INVALID_NETWORK_RESPONSE);
4999 return;
5000 }
5001
5002 cipher_count = SVAL(cipher->data.data, 0);
5003
5004 if (cipher_count > 1) {
5005 tevent_req_nterror(req,
5006 NT_STATUS_INVALID_NETWORK_RESPONSE);
5007 return;
5008 }
5009
5010 if (cipher->data.length != (2 + 2 * cipher_count)) {
5011 tevent_req_nterror(req,
5012 NT_STATUS_INVALID_NETWORK_RESPONSE);
5013 return;
5014 }
5015
5016 if (cipher_count == 1) {
5017 uint16_t cipher_selected;
5018
5019 cipher_selected = SVAL(cipher->data.data, 2);
5020
5021 switch (cipher_selected) {
5022 case SMB2_ENCRYPTION_AES128_GCM:
5023 case SMB2_ENCRYPTION_AES128_CCM:
5024 conn->smb2.server.cipher = cipher_selected;
5025 break;
5026 }
5027 }
5028 }
5029
5030 /* First we hash the request */
5031 smb2cli_req_get_sent_iov(subreq, sent_iov);
5032 samba_SHA512_Init(&sctx);
5033 samba_SHA512_Update(&sctx, conn->smb2.preauth_sha512,
5034 sizeof(conn->smb2.preauth_sha512));
5035 for (i = 0; i < 3; i++) {
5036 samba_SHA512_Update(&sctx, sent_iov[i].iov_base, sent_iov[i].iov_len);
5037 }
5038 samba_SHA512_Final(conn->smb2.preauth_sha512, &sctx);
5039 TALLOC_FREE(subreq);
5040
5041 /* And now we hash the response */
5042 samba_SHA512_Init(&sctx);
5043 samba_SHA512_Update(&sctx, conn->smb2.preauth_sha512,
5044 sizeof(conn->smb2.preauth_sha512));
5045 for (i = 0; i < 3; i++) {
5046 samba_SHA512_Update(&sctx, iov[i].iov_base, iov[i].iov_len);
5047 }
5048 samba_SHA512_Final(conn->smb2.preauth_sha512, &sctx);
5049
5050 tevent_req_done(req);
5051 }
5052
5053 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
5054 TALLOC_CTX *tmp_mem,
5055 uint8_t *inbuf)
5056 {
5057 size_t num_pending = talloc_array_length(conn->pending);
5058 struct tevent_req *subreq;
5059 struct smbXcli_req_state *substate;
5060 struct tevent_req *req;
5061 uint32_t protocol_magic;
5062 size_t inbuf_len = smb_len_nbt(inbuf);
5063
5064 if (num_pending != 1) {
5065 return NT_STATUS_INTERNAL_ERROR;
5066 }
5067
5068 if (inbuf_len < 4) {
5069 return NT_STATUS_INVALID_NETWORK_RESPONSE;
5070 }
5071
5072 subreq = conn->pending[0];
5073 substate = tevent_req_data(subreq, struct smbXcli_req_state);
5074 req = tevent_req_callback_data(subreq, struct tevent_req);
5075
5076 protocol_magic = IVAL(inbuf, 4);
5077
5078 switch (protocol_magic) {
5079 case SMB_MAGIC:
5080 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
5081 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
5082 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
5083
5084 case SMB2_MAGIC:
5085 if (substate->smb2.recv_iov == NULL) {
5086 /*
5087 * For the SMB1 negprot we have move it.
5088 */
5089 substate->smb2.recv_iov = substate->smb1.recv_iov;
5090 substate->smb1.recv_iov = NULL;
5091 }
5092
5093 /*
5094 * we got an SMB2 answer, which consumed sequence number 0
5095 * so we need to use 1 as the next one.
5096 *
5097 * we also need to set the current credits to 0
5098 * as we consumed the initial one. The SMB2 answer
5099 * hopefully grant us a new credit.
5100 */
5101 conn->smb2.mid = 1;
5102 conn->smb2.cur_credits = 0;
5103 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
5104 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
5105 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
5106 }
5107
5108 DEBUG(10, ("Got non-SMB PDU\n"));
5109 return NT_STATUS_INVALID_NETWORK_RESPONSE;
5110 }
5111
5112 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
5113 {
5114 return tevent_req_simple_recv_ntstatus(req);
5115 }
5116
5117 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
5118 uint32_t timeout_msec,
5119 enum protocol_types min_protocol,
5120 enum protocol_types max_protocol)
5121 {
5122 TALLOC_CTX *frame = talloc_stackframe();
5123 struct tevent_context *ev;
5124 struct tevent_req *req;
5125 NTSTATUS status = NT_STATUS_NO_MEMORY;
5126 bool ok;
5127
5128 if (smbXcli_conn_has_async_calls(conn)) {
5129 /*
5130 * Can't use sync call while an async call is in flight
5131 */
5132 status = NT_STATUS_INVALID_PARAMETER_MIX;
5133 goto fail;
5134 }
5135 ev = samba_tevent_context_init(frame);
5136 if (ev == NULL) {
5137 goto fail;
5138 }
5139 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
5140 min_protocol, max_protocol);
5141 if (req == NULL) {
5142 goto fail;
5143 }
5144 ok = tevent_req_poll_ntstatus(req, ev, &status);
5145 if (!ok) {
5146 goto fail;
5147 }
5148 status = smbXcli_negprot_recv(req);
5149 fail:
5150 TALLOC_FREE(frame);
5151 return status;
5152 }
5153
5154 struct smb2cli_validate_negotiate_info_state {
5155 struct smbXcli_conn *conn;
5156 DATA_BLOB in_input_buffer;
5157 DATA_BLOB in_output_buffer;
5158 DATA_BLOB out_input_buffer;
5159 DATA_BLOB out_output_buffer;
5160 uint16_t dialect;
5161 };
5162
5163 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq);
5164
5165 struct tevent_req *smb2cli_validate_negotiate_info_send(TALLOC_CTX *mem_ctx,
5166 struct tevent_context *ev,
5167 struct smbXcli_conn *conn,
5168 uint32_t timeout_msec,
5169 struct smbXcli_session *session,
5170 struct smbXcli_tcon *tcon)
5171 {
5172 struct tevent_req *req;
5173 struct smb2cli_validate_negotiate_info_state *state;
5174 uint8_t *buf;
5175 uint16_t dialect_count = 0;
5176 struct tevent_req *subreq;
5177 bool _save_should_sign;
5178 size_t i;
5179
5180 req = tevent_req_create(mem_ctx, &state,
5181 struct smb2cli_validate_negotiate_info_state);
5182 if (req == NULL) {
5183 return NULL;
5184 }
5185 state->conn = conn;
5186
5187 state->in_input_buffer = data_blob_talloc_zero(state,
5188 4 + 16 + 1 + 1 + 2);
5189 if (tevent_req_nomem(state->in_input_buffer.data, req)) {
5190 return tevent_req_post(req, ev);
5191 }
5192 buf = state->in_input_buffer.data;
5193
5194 if (state->conn->max_protocol >= PROTOCOL_SMB2_22) {
5195 SIVAL(buf, 0, conn->smb2.client.capabilities);
5196 } else {
5197 SIVAL(buf, 0, 0); /* Capabilities */
5198 }
5199 if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
5200 NTSTATUS status;
5201 DATA_BLOB blob;
5202
5203 status = GUID_to_ndr_blob(&conn->smb2.client.guid,
5204 state, &blob);
5205 if (!NT_STATUS_IS_OK(status)) {
5206 return NULL;
5207 }
5208 memcpy(buf+4, blob.data, 16); /* ClientGuid */
5209 } else {
5210 memset(buf+4, 0, 16); /* ClientGuid */
5211 }
5212 if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
5213 SCVAL(buf, 20, conn->smb2.client.security_mode);
5214 } else {
5215 SCVAL(buf, 20, 0);
5216 }
5217 SCVAL(buf, 21, 0); /* reserved */
5218
5219 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
5220 bool ok;
5221 size_t ofs;
5222
5223 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
5224 continue;
5225 }
5226
5227 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
5228 continue;
5229 }
5230
5231 if (smb2cli_prots[i].proto == state->conn->protocol) {
5232 state->dialect = smb2cli_prots[i].smb2_dialect;
5233 }
5234
5235 ofs = state->in_input_buffer.length;
5236 ok = data_blob_realloc(state, &state->in_input_buffer,
5237 ofs + 2);
5238 if (!ok) {
5239 tevent_req_oom(req);
5240 return tevent_req_post(req, ev);
5241 }
5242
5243 buf = state->in_input_buffer.data;
5244 SSVAL(buf, ofs, smb2cli_prots[i].smb2_dialect);
5245
5246 dialect_count++;
5247 }
5248 buf = state->in_input_buffer.data;
5249 SSVAL(buf, 22, dialect_count);
5250
5251 _save_should_sign = smb2cli_tcon_is_signing_on(tcon);
5252 smb2cli_tcon_should_sign(tcon, true);
5253 subreq = smb2cli_ioctl_send(state, ev, conn,
5254 timeout_msec, session, tcon,
5255 UINT64_MAX, /* in_fid_persistent */
5256 UINT64_MAX, /* in_fid_volatile */
5257 FSCTL_VALIDATE_NEGOTIATE_INFO,
5258 0, /* in_max_input_length */
5259 &state->in_input_buffer,
5260 24, /* in_max_output_length */
5261 &state->in_output_buffer,
5262 SMB2_IOCTL_FLAG_IS_FSCTL);
5263 smb2cli_tcon_should_sign(tcon, _save_should_sign);
5264 if (tevent_req_nomem(subreq, req)) {
5265 return tevent_req_post(req, ev);
5266 }
5267 tevent_req_set_callback(subreq,
5268 smb2cli_validate_negotiate_info_done,
5269 req);
5270
5271 return req;
5272 }
5273
5274 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq)
5275 {
5276 struct tevent_req *req =
5277 tevent_req_callback_data(subreq,
5278 struct tevent_req);
5279 struct smb2cli_validate_negotiate_info_state *state =
5280 tevent_req_data(req,
5281 struct smb2cli_validate_negotiate_info_state);
5282 NTSTATUS status;
5283 const uint8_t *buf;
5284 uint32_t capabilities;
5285 DATA_BLOB guid_blob;
5286 struct GUID server_guid;
5287 uint16_t security_mode;
5288 uint16_t dialect;
5289
5290 status = smb2cli_ioctl_recv(subreq, state,
5291 &state->out_input_buffer,
5292 &state->out_output_buffer);
5293 TALLOC_FREE(subreq);
5294 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED)) {
5295 /*
5296 * The response was signed, but not supported
5297 *
5298 * Older Windows and Samba releases return
5299 * NT_STATUS_FILE_CLOSED.
5300 */
5301 tevent_req_done(req);
5302 return;
5303 }
5304 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_DEVICE_REQUEST)) {
5305 /*
5306 * The response was signed, but not supported
5307 *
5308 * This is returned by the NTVFS based Samba 4.x file server
5309 * for file shares.
5310 */
5311 tevent_req_done(req);
5312 return;
5313 }
5314 if (NT_STATUS_EQUAL(status, NT_STATUS_FS_DRIVER_REQUIRED)) {
5315 /*
5316 * The response was signed, but not supported
5317 *
5318 * This is returned by the NTVFS based Samba 4.x file server
5319 * for ipc shares.
5320 */
5321 tevent_req_done(req);
5322 return;
5323 }
5324 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
5325 /*
5326 * The response was signed, but not supported
5327 *
5328 * This might be returned by older Windows versions or by
5329 * NetApp SMB server implementations.
5330 *
5331 * See
5332 *
5333 * https://blogs.msdn.microsoft.com/openspecification/2012/06/28/smb3-secure-dialect-negotiation/
5334 *
5335 */
5336 tevent_req_done(req);
5337 return;
5338 }
5339 if (tevent_req_nterror(req, status)) {
5340 return;
5341 }
5342
5343 if (state->out_output_buffer.length != 24) {
5344 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5345 return;
5346 }
5347
5348 buf = state->out_output_buffer.data;
5349
5350 capabilities = IVAL(buf, 0);
5351 guid_blob = data_blob_const(buf + 4, 16);
5352 status = GUID_from_data_blob(&guid_blob, &server_guid);
5353 if (tevent_req_nterror(req, status)) {
5354 return;
5355 }
5356 security_mode = CVAL(buf, 20);
5357 dialect = SVAL(buf, 22);
5358
5359 if (capabilities != state->conn->smb2.server.capabilities) {
5360 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5361 return;
5362 }
5363
5364 if (!GUID_equal(&server_guid, &state->conn->smb2.server.guid)) {
5365 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5366 return;
5367 }
5368
5369 if (security_mode != state->conn->smb2.server.security_mode) {
5370 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5371 return;
5372 }
5373
5374 if (dialect != state->dialect) {
5375 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5376 return;
5377 }
5378
5379 tevent_req_done(req);
5380 }
5381
5382 NTSTATUS smb2cli_validate_negotiate_info_recv(struct tevent_req *req)
5383 {
5384 return tevent_req_simple_recv_ntstatus(req);
5385 }
5386
5387 static int smbXcli_session_destructor(struct smbXcli_session *session)
5388 {
5389 if (session->conn == NULL) {
5390 return 0;
5391 }
5392
5393 DLIST_REMOVE(session->conn->sessions, session);
5394 return 0;
5395 }
5396
5397 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
5398 struct smbXcli_conn *conn)
5399 {
5400 struct smbXcli_session *session;
5401
5402 session = talloc_zero(mem_ctx, struct smbXcli_session);
5403 if (session == NULL) {
5404 return NULL;
5405 }
5406 session->smb2 = talloc_zero(session, struct smb2cli_session);
5407 if (session->smb2 == NULL) {
5408 talloc_free(session);
5409 return NULL;
5410 }
5411 talloc_set_destructor(session, smbXcli_session_destructor);
5412
5413 DLIST_ADD_END(conn->sessions, session);
5414 session->conn = conn;
5415
5416 memcpy(session->smb2_channel.preauth_sha512,
5417 conn->smb2.preauth_sha512,
5418 sizeof(session->smb2_channel.preauth_sha512));
5419
5420 return session;
5421 }
5422
5423 struct smbXcli_session *smbXcli_session_copy(TALLOC_CTX *mem_ctx,
5424 struct smbXcli_session *src)
5425 {
5426 struct smbXcli_session *session;
5427
5428 session = talloc_zero(mem_ctx, struct smbXcli_session);
5429 if (session == NULL) {
5430 return NULL;
5431 }
5432 session->smb2 = talloc_zero(session, struct smb2cli_session);
5433 if (session->smb2 == NULL) {
5434 talloc_free(session);
5435 return NULL;
5436 }
5437
5438 session->conn = src->conn;
5439 *session->smb2 = *src->smb2;
5440 session->smb2_channel = src->smb2_channel;
5441 session->disconnect_expired = src->disconnect_expired;
5442
5443 DLIST_ADD_END(src->conn->sessions, session);
5444 talloc_set_destructor(session, smbXcli_session_destructor);
5445
5446 return session;
5447 }
5448
5449 bool smbXcli_session_is_guest(struct smbXcli_session *session)
5450 {
5451 if (session == NULL) {
5452 return false;
5453 }
5454
5455 if (session->conn == NULL) {
5456 return false;
5457 }
5458
5459 if (session->conn->mandatory_signing) {
5460 return false;
5461 }
5462
5463 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5464 if (session->smb2->session_flags & SMB2_SESSION_FLAG_IS_GUEST) {
5465 return true;
5466 }
5467 return false;
5468 }
5469
5470 if (session->smb1.action & SMB_SETUP_GUEST) {
5471 return true;
5472 }
5473
5474 return false;
5475 }
5476
5477 bool smbXcli_session_is_authenticated(struct smbXcli_session *session)
5478 {
5479 const DATA_BLOB *application_key;
5480
5481 if (session == NULL) {
5482 return false;
5483 }
5484
5485 if (session->conn == NULL) {
5486 return false;
5487 }
5488
5489 /*
5490 * If we have an application key we had a session key negotiated
5491 * at auth time.
5492 */
5493 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5494 application_key = &session->smb2->application_key;
5495 } else {
5496 application_key = &session->smb1.application_key;
5497 }
5498
5499 if (application_key->length == 0) {
5500 return false;
5501 }
5502
5503 return true;
5504 }
5505
5506 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
5507 TALLOC_CTX *mem_ctx,
5508 DATA_BLOB *key)
5509 {
5510 const DATA_BLOB *application_key;
5511
5512 *key = data_blob_null;
5513
5514 if (session->conn == NULL) {
5515 return NT_STATUS_NO_USER_SESSION_KEY;
5516 }
5517
5518 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5519 application_key = &session->smb2->application_key;
5520 } else {
5521 application_key = &session->smb1.application_key;
5522 }
5523
5524 if (application_key->length == 0) {
5525 return NT_STATUS_NO_USER_SESSION_KEY;
5526 }
5527
5528 *key = data_blob_dup_talloc(mem_ctx, *application_key);
5529 if (key->data == NULL) {
5530 return NT_STATUS_NO_MEMORY;
5531 }
5532
5533 return NT_STATUS_OK;
5534 }
5535
5536 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
5537 {
5538 session->disconnect_expired = true;
5539 }
5540
5541 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
5542 {
5543 return session->smb1.session_id;
5544 }
5545
5546 void smb1cli_session_set_id(struct smbXcli_session *session,
5547 uint16_t session_id)
5548 {
5549 session->smb1.session_id = session_id;
5550 }
5551
5552 void smb1cli_session_set_action(struct smbXcli_session *session,
5553 uint16_t action)
5554 {
5555 session->smb1.action = action;
5556 }
5557
5558 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
5559 const DATA_BLOB _session_key)
5560 {
5561 struct smbXcli_conn *conn = session->conn;
5562 uint8_t session_key[16];
5563
5564 if (conn == NULL) {
5565 return NT_STATUS_INVALID_PARAMETER_MIX;
5566 }
5567
5568 if (session->smb1.application_key.length != 0) {
5569 /*
5570 * TODO: do not allow this...
5571 *
5572 * return NT_STATUS_INVALID_PARAMETER_MIX;
5573 */
5574 data_blob_clear_free(&session->smb1.application_key);
5575 session->smb1.protected_key = false;
5576 }
5577
5578 if (_session_key.length == 0) {
5579 return NT_STATUS_OK;
5580 }
5581
5582 ZERO_STRUCT(session_key);
5583 memcpy(session_key, _session_key.data,
5584 MIN(_session_key.length, sizeof(session_key)));
5585
5586 session->smb1.application_key = data_blob_talloc(session,
5587 session_key,
5588 sizeof(session_key));
5589 ZERO_STRUCT(session_key);
5590 if (session->smb1.application_key.data == NULL) {
5591 return NT_STATUS_NO_MEMORY;
5592 }
5593
5594 session->smb1.protected_key = false;
5595
5596 return NT_STATUS_OK;
5597 }
5598
5599 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
5600 {
5601 if (session->smb1.protected_key) {
5602 /* already protected */
5603 return NT_STATUS_OK;
5604 }
5605
5606 if (session->smb1.application_key.length != 16) {
5607 return NT_STATUS_INVALID_PARAMETER_MIX;
5608 }
5609
5610 smb_key_derivation(session->smb1.application_key.data,
5611 session->smb1.application_key.length,
5612 session->smb1.application_key.data);
5613
5614 session->smb1.protected_key = true;
5615
5616 return NT_STATUS_OK;
5617 }
5618
5619 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
5620 {
5621 struct smbXcli_conn *conn = session->conn;
5622 uint8_t security_mode = 0;
5623
5624 if (conn == NULL) {
5625 return security_mode;
5626 }
5627
5628 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
5629 if (conn->mandatory_signing) {
5630 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
5631 }
5632 if (session->smb2->should_sign) {
5633 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
5634 }
5635
5636 return security_mode;
5637 }
5638
5639 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
5640 {
5641 return session->smb2->session_id;
5642 }
5643
5644 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
5645 {
5646 return session->smb2->session_flags;
5647 }
5648
5649 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
5650 uint64_t session_id,
5651 uint16_t session_flags)
5652 {
5653 session->smb2->session_id = session_id;
5654 session->smb2->session_flags = session_flags;
5655 }
5656
5657 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
5658 {
5659 session->smb2->channel_sequence += 1;
5660 }
5661
5662 uint16_t smb2cli_session_reset_channel_sequence(struct smbXcli_session *session,
5663 uint16_t channel_sequence)
5664 {
5665 uint16_t prev_cs;
5666
5667 prev_cs = session->smb2->channel_sequence;
5668 session->smb2->channel_sequence = channel_sequence;
5669
5670 return prev_cs;
5671 }
5672
5673 uint16_t smb2cli_session_current_channel_sequence(struct smbXcli_session *session)
5674 {
5675 return session->smb2->channel_sequence;
5676 }
5677
5678 void smb2cli_session_start_replay(struct smbXcli_session *session)
5679 {
5680 session->smb2->replay_active = true;
5681 }
5682
5683 void smb2cli_session_stop_replay(struct smbXcli_session *session)
5684 {
5685 session->smb2->replay_active = false;
5686 }
5687
5688 NTSTATUS smb2cli_session_update_preauth(struct smbXcli_session *session,
5689 const struct iovec *iov)
5690 {
5691 struct hc_sha512state sctx;
5692 size_t i;
5693
5694 if (session->conn == NULL) {
5695 return NT_STATUS_INTERNAL_ERROR;
5696 }
5697
5698 if (session->conn->protocol < PROTOCOL_SMB3_10) {
5699 return NT_STATUS_OK;
5700 }
5701
5702 if (session->smb2_channel.signing_key.length != 0) {
5703 return NT_STATUS_OK;
5704 }
5705
5706 samba_SHA512_Init(&sctx);
5707 samba_SHA512_Update(&sctx, session->smb2_channel.preauth_sha512,
5708 sizeof(session->smb2_channel.preauth_sha512));
5709 for (i = 0; i < 3; i++) {
5710 samba_SHA512_Update(&sctx, iov[i].iov_base, iov[i].iov_len);
5711 }
5712 samba_SHA512_Final(session->smb2_channel.preauth_sha512, &sctx);
5713
5714 return NT_STATUS_OK;
5715 }
5716
5717 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
5718 const DATA_BLOB _session_key,
5719 const struct iovec *recv_iov)
5720 {
5721 struct smbXcli_conn *conn = session->conn;
5722 uint16_t no_sign_flags = 0;
5723 uint8_t session_key[16];
5724 bool check_signature = true;
5725 uint32_t hdr_flags;
5726 NTSTATUS status;
5727 struct _derivation {
5728 DATA_BLOB label;
5729 DATA_BLOB context;
5730 };
5731 struct {
5732 struct _derivation signing;
5733 struct _derivation encryption;
5734 struct _derivation decryption;
5735 struct _derivation application;
5736 } derivation = { };
5737 size_t nonce_size = 0;
5738
5739 if (conn == NULL) {
5740 return NT_STATUS_INVALID_PARAMETER_MIX;
5741 }
5742
5743 if (recv_iov[0].iov_len != SMB2_HDR_BODY) {
5744 return NT_STATUS_INVALID_PARAMETER_MIX;
5745 }
5746
5747 if (!conn->mandatory_signing) {
5748 /*
5749 * only allow guest sessions without
5750 * mandatory signing.
5751 *
5752 * If we try an authentication with username != ""
5753 * and the server let us in without verifying the
5754 * password we don't have a negotiated session key
5755 * for signing.
5756 */
5757 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST;
5758 }
5759
5760 if (session->smb2->session_flags & no_sign_flags) {
5761 session->smb2->should_sign = false;
5762 return NT_STATUS_OK;
5763 }
5764
5765 if (session->smb2->signing_key.length != 0) {
5766 return NT_STATUS_INVALID_PARAMETER_MIX;
5767 }
5768
5769 if (conn->protocol >= PROTOCOL_SMB3_10) {
5770 struct _derivation *d;
5771 DATA_BLOB p;
5772
5773 p = data_blob_const(session->smb2_channel.preauth_sha512,
5774 sizeof(session->smb2_channel.preauth_sha512));
5775
5776 d = &derivation.signing;
5777 d->label = data_blob_string_const_null("SMBSigningKey");
5778 d->context = p;
5779
5780 d = &derivation.encryption;
5781 d->label = data_blob_string_const_null("SMBC2SCipherKey");
5782 d->context = p;
5783
5784 d = &derivation.decryption;
5785 d->label = data_blob_string_const_null("SMBS2CCipherKey");
5786 d->context = p;
5787
5788 d = &derivation.application;
5789 d->label = data_blob_string_const_null("SMBAppKey");
5790 d->context = p;
5791
5792 } else if (conn->protocol >= PROTOCOL_SMB2_24) {
5793 struct _derivation *d;
5794
5795 d = &derivation.signing;
5796 d->label = data_blob_string_const_null("SMB2AESCMAC");
5797 d->context = data_blob_string_const_null("SmbSign");
5798
5799 d = &derivation.encryption;
5800 d->label = data_blob_string_const_null("SMB2AESCCM");
5801 d->context = data_blob_string_const_null("ServerIn ");
5802
5803 d = &derivation.decryption;
5804 d->label = data_blob_string_const_null("SMB2AESCCM");
5805 d->context = data_blob_string_const_null("ServerOut");
5806
5807 d = &derivation.application;
5808 d->label = data_blob_string_const_null("SMB2APP");
5809 d->context = data_blob_string_const_null("SmbRpc");
5810 }
5811
5812 ZERO_STRUCT(session_key);
5813 memcpy(session_key, _session_key.data,
5814 MIN(_session_key.length, sizeof(session_key)));
5815
5816 session->smb2->signing_key = data_blob_talloc(session,
5817 session_key,
5818 sizeof(session_key));
5819 if (session->smb2->signing_key.data == NULL) {
5820 ZERO_STRUCT(session_key);
5821 return NT_STATUS_NO_MEMORY;
5822 }
5823
5824 if (conn->protocol >= PROTOCOL_SMB2_24) {
5825 struct _derivation *d = &derivation.signing;
5826
5827 smb2_key_derivation(session_key, sizeof(session_key),
5828 d->label.data, d->label.length,
5829 d->context.data, d->context.length,
5830 session->smb2->signing_key.data);
5831 }
5832
5833 session->smb2->encryption_key = data_blob_dup_talloc(session,
5834 session->smb2->signing_key);
5835 if (session->smb2->encryption_key.data == NULL) {
5836 ZERO_STRUCT(session_key);
5837 return NT_STATUS_NO_MEMORY;
5838 }
5839
5840 if (conn->protocol >= PROTOCOL_SMB2_24) {
5841 struct _derivation *d = &derivation.encryption;
5842
5843 smb2_key_derivation(session_key, sizeof(session_key),
5844 d->label.data, d->label.length,
5845 d->context.data, d->context.length,
5846 session->smb2->encryption_key.data);
5847 }
5848
5849 session->smb2->decryption_key = data_blob_dup_talloc(session,
5850 session->smb2->signing_key);
5851 if (session->smb2->decryption_key.data == NULL) {
5852 ZERO_STRUCT(session_key);
5853 return NT_STATUS_NO_MEMORY;
5854 }
5855
5856 if (conn->protocol >= PROTOCOL_SMB2_24) {
5857 struct _derivation *d = &derivation.decryption;
5858
5859 smb2_key_derivation(session_key, sizeof(session_key),
5860 d->label.data, d->label.length,
5861 d->context.data, d->context.length,
5862 session->smb2->decryption_key.data);
5863 }
5864
5865 session->smb2->application_key = data_blob_dup_talloc(session,
5866 session->smb2->signing_key);
5867 if (session->smb2->application_key.data == NULL) {
5868 ZERO_STRUCT(session_key);
5869 return NT_STATUS_NO_MEMORY;
5870 }
5871
5872 if (conn->protocol >= PROTOCOL_SMB2_24) {
5873 struct _derivation *d = &derivation.application;
5874
5875 smb2_key_derivation(session_key, sizeof(session_key),
5876 d->label.data, d->label.length,
5877 d->context.data, d->context.length,
5878 session->smb2->application_key.data);
5879 }
5880 ZERO_STRUCT(session_key);
5881
5882 session->smb2_channel.signing_key = data_blob_dup_talloc(session,
5883 session->smb2->signing_key);
5884 if (session->smb2_channel.signing_key.data == NULL) {
5885 return NT_STATUS_NO_MEMORY;
5886 }
5887
5888 check_signature = conn->mandatory_signing;
5889
5890 hdr_flags = IVAL(recv_iov[0].iov_base, SMB2_HDR_FLAGS);
5891 if (hdr_flags & SMB2_HDR_FLAG_SIGNED) {
5892 /*
5893 * Sadly some vendors don't sign the
5894 * final SMB2 session setup response
5895 *
5896 * At least Windows and Samba are always doing this
5897 * if there's a session key available.
5898 *
5899 * We only check the signature if it's mandatory
5900 * or SMB2_HDR_FLAG_SIGNED is provided.
5901 */
5902 check_signature = true;
5903 }
5904
5905 if (conn->protocol >= PROTOCOL_SMB3_10) {
5906 check_signature = true;
5907 }
5908
5909 if (check_signature) {
5910 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
5911 session->conn->protocol,
5912 recv_iov, 3);
5913 if (!NT_STATUS_IS_OK(status)) {
5914 return status;
5915 }
5916 }
5917
5918 session->smb2->should_sign = false;
5919 session->smb2->should_encrypt = false;
5920
5921 if (conn->desire_signing) {
5922 session->smb2->should_sign = true;
5923 }
5924
5925 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
5926 session->smb2->should_sign = true;
5927 }
5928
5929 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
5930 session->smb2->should_encrypt = true;
5931 }
5932
5933 if (conn->protocol < PROTOCOL_SMB2_24) {
5934 session->smb2->should_encrypt = false;
5935 }
5936
5937 if (conn->smb2.server.cipher == 0) {
5938 session->smb2->should_encrypt = false;
5939 }
5940
5941 /*
5942 * CCM and GCM algorithms must never have their
5943 * nonce wrap, or the security of the whole
5944 * communication and the keys is destroyed.
5945 * We must drop the connection once we have
5946 * transfered too much data.
5947 *
5948 * NOTE: We assume nonces greater than 8 bytes.
5949 */
5950 generate_random_buffer((uint8_t *)&session->smb2->nonce_high_random,
5951 sizeof(session->smb2->nonce_high_random));
5952 switch (conn->smb2.server.cipher) {
5953 case SMB2_ENCRYPTION_AES128_CCM:
5954 nonce_size = AES_CCM_128_NONCE_SIZE;
5955 break;
5956 case SMB2_ENCRYPTION_AES128_GCM:
5957 nonce_size = AES_GCM_128_IV_SIZE;
5958 break;
5959 default:
5960 nonce_size = 0;
5961 break;
5962 }
5963 session->smb2->nonce_high_max = SMB2_NONCE_HIGH_MAX(nonce_size);
5964 session->smb2->nonce_high = 0;
5965 session->smb2->nonce_low = 0;
5966
5967 return NT_STATUS_OK;
5968 }
5969
5970 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
5971 struct smbXcli_session *session1,
5972 struct smbXcli_conn *conn,
5973 struct smbXcli_session **_session2)
5974 {
5975 struct smbXcli_session *session2;
5976
5977 if (session1->smb2->signing_key.length == 0) {
5978 return NT_STATUS_INVALID_PARAMETER_MIX;
5979 }
5980
5981 if (conn == NULL) {
5982 return NT_STATUS_INVALID_PARAMETER_MIX;
5983 }
5984
5985 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
5986 if (session2 == NULL) {
5987 return NT_STATUS_NO_MEMORY;
5988 }
5989 session2->smb2 = talloc_reference(session2, session1->smb2);
5990 if (session2->smb2 == NULL) {
5991 talloc_free(session2);
5992 return NT_STATUS_NO_MEMORY;
5993 }
5994
5995 talloc_set_destructor(session2, smbXcli_session_destructor);
5996 DLIST_ADD_END(conn->sessions, session2);
5997 session2->conn = conn;
5998
5999 memcpy(session2->smb2_channel.preauth_sha512,
6000 conn->smb2.preauth_sha512,
6001 sizeof(session2->smb2_channel.preauth_sha512));
6002
6003 *_session2 = session2;
6004 return NT_STATUS_OK;
6005 }
6006
6007 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
6008 const DATA_BLOB _channel_key,
6009 const struct iovec *recv_iov)
6010 {
6011 struct smbXcli_conn *conn = session->conn;
6012 uint8_t channel_key[16];
6013 NTSTATUS status;
6014 struct _derivation {
6015 DATA_BLOB label;
6016 DATA_BLOB context;
6017 };
6018 struct {
6019 struct _derivation signing;
6020 } derivation = { };
6021
6022 if (conn == NULL) {
6023 return NT_STATUS_INVALID_PARAMETER_MIX;
6024 }
6025
6026 if (session->smb2_channel.signing_key.length != 0) {
6027 return NT_STATUS_INVALID_PARAMETER_MIX;
6028 }
6029
6030 if (conn->protocol >= PROTOCOL_SMB3_10) {
6031 struct _derivation *d;
6032 DATA_BLOB p;
6033
6034 p = data_blob_const(session->smb2_channel.preauth_sha512,
6035 sizeof(session->smb2_channel.preauth_sha512));
6036
6037 d = &derivation.signing;
6038 d->label = data_blob_string_const_null("SMBSigningKey");
6039 d->context = p;
6040 } else if (conn->protocol >= PROTOCOL_SMB2_24) {
6041 struct _derivation *d;
6042
6043 d = &derivation.signing;
6044 d->label = data_blob_string_const_null("SMB2AESCMAC");
6045 d->context = data_blob_string_const_null("SmbSign");
6046 }
6047
6048 ZERO_STRUCT(channel_key);
6049 memcpy(channel_key, _channel_key.data,
6050 MIN(_channel_key.length, sizeof(channel_key)));
6051
6052 session->smb2_channel.signing_key = data_blob_talloc(session,
6053 channel_key,
6054 sizeof(channel_key));
6055 if (session->smb2_channel.signing_key.data == NULL) {
6056 ZERO_STRUCT(channel_key);
6057 return NT_STATUS_NO_MEMORY;
6058 }
6059
6060 if (conn->protocol >= PROTOCOL_SMB2_24) {
6061 struct _derivation *d = &derivation.signing;
6062
6063 smb2_key_derivation(channel_key, sizeof(channel_key),
6064 d->label.data, d->label.length,
6065 d->context.data, d->context.length,
6066 session->smb2_channel.signing_key.data);
6067 }
6068 ZERO_STRUCT(channel_key);
6069
6070 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
6071 session->conn->protocol,
6072 recv_iov, 3);
6073 if (!NT_STATUS_IS_OK(status)) {
6074 return status;
6075 }
6076
6077 return NT_STATUS_OK;
6078 }
6079
6080 NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
6081 {
6082 if (!session->smb2->should_sign) {
6083 /*
6084 * We need required signing on the session
6085 * in order to prevent man in the middle attacks.
6086 */
6087 return NT_STATUS_INVALID_PARAMETER_MIX;
6088 }
6089
6090 if (session->smb2->should_encrypt) {
6091 return NT_STATUS_OK;
6092 }
6093
6094 if (session->conn->protocol < PROTOCOL_SMB2_24) {
6095 return NT_STATUS_NOT_SUPPORTED;
6096 }
6097
6098 if (session->conn->smb2.server.cipher == 0) {
6099 return NT_STATUS_NOT_SUPPORTED;
6100 }
6101
6102 if (session->smb2->signing_key.data == NULL) {
6103 return NT_STATUS_NOT_SUPPORTED;
6104 }
6105 session->smb2->should_encrypt = true;
6106 return NT_STATUS_OK;
6107 }
6108
6109 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
6110 {
6111 struct smbXcli_tcon *tcon;
6112
6113 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
6114 if (tcon == NULL) {
6115 return NULL;
6116 }
6117
6118 return tcon;
6119 }
6120
6121 void smbXcli_tcon_set_fs_attributes(struct smbXcli_tcon *tcon,
6122 uint32_t fs_attributes)
6123 {
6124 tcon->fs_attributes = fs_attributes;
6125 }
6126
6127 uint32_t smbXcli_tcon_get_fs_attributes(struct smbXcli_tcon *tcon)
6128 {
6129 return tcon->fs_attributes;
6130 }
6131
6132 bool smbXcli_tcon_is_dfs_share(struct smbXcli_tcon *tcon)
6133 {
6134 if (tcon == NULL) {
6135 return false;
6136 }
6137
6138 if (tcon->is_smb1) {
6139 if (tcon->smb1.optional_support & SMB_SHARE_IN_DFS) {
6140 return true;
6141 }
6142
6143 return false;
6144 }
6145
6146 if (tcon->smb2.capabilities & SMB2_SHARE_CAP_DFS) {
6147 return true;
6148 }
6149
6150 return false;
6151 }
6152
6153 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
6154 {
6155 return tcon->smb1.tcon_id;
6156 }
6157
6158 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
6159 {
6160 tcon->is_smb1 = true;
6161 tcon->smb1.tcon_id = tcon_id;
6162 }
6163
6164 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
6165 uint16_t tcon_id,
6166 uint16_t optional_support,
6167 uint32_t maximal_access,
6168 uint32_t guest_maximal_access,
6169 const char *service,
6170 const char *fs_type)
6171 {
6172 tcon->is_smb1 = true;
6173 tcon->fs_attributes = 0;
6174 tcon->smb1.tcon_id = tcon_id;
6175 tcon->smb1.optional_support = optional_support;
6176 tcon->smb1.maximal_access = maximal_access;
6177 tcon->smb1.guest_maximal_access = guest_maximal_access;
6178
6179 TALLOC_FREE(tcon->smb1.service);
6180 tcon->smb1.service = talloc_strdup(tcon, service);
6181 if (service != NULL && tcon->smb1.service == NULL) {
6182 return false;
6183 }
6184
6185 TALLOC_FREE(tcon->smb1.fs_type);
6186 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
6187 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
6188 return false;
6189 }
6190
6191 return true;
6192 }
6193
6194 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
6195 {
6196 return tcon->smb2.tcon_id;
6197 }
6198
6199 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
6200 {
6201 return tcon->smb2.capabilities;
6202 }
6203
6204 uint32_t smb2cli_tcon_flags(struct smbXcli_tcon *tcon)
6205 {
6206 return tcon->smb2.flags;
6207 }
6208
6209 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
6210 struct smbXcli_session *session,
6211 uint32_t tcon_id,
6212 uint8_t type,
6213 uint32_t flags,
6214 uint32_t capabilities,
6215 uint32_t maximal_access)
6216 {
6217 tcon->is_smb1 = false;
6218 tcon->fs_attributes = 0;
6219 tcon->smb2.tcon_id = tcon_id;
6220 tcon->smb2.type = type;
6221 tcon->smb2.flags = flags;
6222 tcon->smb2.capabilities = capabilities;
6223 tcon->smb2.maximal_access = maximal_access;
6224
6225 tcon->smb2.should_sign = false;
6226 tcon->smb2.should_encrypt = false;
6227
6228 if (session == NULL) {
6229 return;
6230 }
6231
6232 tcon->smb2.should_sign = session->smb2->should_sign;
6233 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
6234
6235 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
6236 tcon->smb2.should_encrypt = true;
6237 }
6238 }
6239
6240 void smb2cli_tcon_should_sign(struct smbXcli_tcon *tcon,
6241 bool should_sign)
6242 {
6243 tcon->smb2.should_sign = should_sign;
6244 }
6245
6246 bool smb2cli_tcon_is_signing_on(struct smbXcli_tcon *tcon)
6247 {
6248 if (tcon->smb2.should_encrypt) {
6249 return true;
6250 }
6251
6252 return tcon->smb2.should_sign;
6253 }
6254
6255 void smb2cli_tcon_should_encrypt(struct smbXcli_tcon *tcon,
6256 bool should_encrypt)
6257 {
6258 tcon->smb2.should_encrypt = should_encrypt;
6259 }
6260
6261 bool smb2cli_tcon_is_encryption_on(struct smbXcli_tcon *tcon)
6262 {
6263 return tcon->smb2.should_encrypt;
6264 }
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