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ldb: change the version to 2.11.0 for Samba 4.22
[samba.git] / libcli / smb / smbXcli_base.c
blobf3b534a6c6b1c3dec48f4efe5dc3d20bfedf7961
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 "libcli/smb/smb2_signing.h"
37
38 #include "lib/crypto/gnutls_helpers.h"
39 #include <gnutls/gnutls.h>
40 #include <gnutls/crypto.h>
41
42 struct smbXcli_conn;
43 struct smbXcli_req;
44 struct smbXcli_session;
45 struct smbXcli_tcon;
46
47 struct smbXcli_conn {
48 int sock_fd;
49 struct sockaddr_storage local_ss;
50 struct sockaddr_storage remote_ss;
51 const char *remote_name;
52
53 struct tevent_queue *outgoing;
54 struct tevent_req **pending;
55 struct tevent_req *read_smb_req;
56 struct tevent_req *suicide_req;
57
58 enum protocol_types min_protocol;
59 enum protocol_types max_protocol;
60 enum protocol_types protocol;
61 bool allow_signing;
62 bool desire_signing;
63 bool mandatory_signing;
64
65 /*
66 * The incoming dispatch function should return:
67 * - NT_STATUS_RETRY, if more incoming PDUs are expected.
68 * - NT_STATUS_OK, if no more processing is desired, e.g.
69 * the dispatch function called
70 * tevent_req_done().
71 * - All other return values disconnect the connection.
72 */
73 NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
74 TALLOC_CTX *tmp_mem,
75 uint8_t *inbuf);
76
77 struct {
78 struct {
79 uint32_t capabilities;
80 uint32_t max_xmit;
81 } client;
82
83 struct {
84 uint32_t capabilities;
85 uint32_t max_xmit;
86 uint16_t max_mux;
87 uint16_t security_mode;
88 bool readbraw;
89 bool writebraw;
90 bool lockread;
91 bool writeunlock;
92 uint32_t session_key;
93 struct GUID guid;
94 DATA_BLOB gss_blob;
95 uint8_t challenge[8];
96 const char *workgroup;
97 const char *name;
98 int time_zone;
99 NTTIME system_time;
100 } server;
101
102 uint32_t capabilities;
103 uint32_t max_xmit;
104
105 uint16_t mid;
106
107 struct smb1_signing_state *signing;
108 struct smb_trans_enc_state *trans_enc;
109
110 struct tevent_req *read_braw_req;
111 } smb1;
112
113 struct {
114 struct {
115 uint32_t capabilities;
116 uint16_t security_mode;
117 struct GUID guid;
118 struct smb311_capabilities smb3_capabilities;
119 } client;
120
121 struct {
122 uint32_t capabilities;
123 uint16_t security_mode;
124 struct GUID guid;
125 uint32_t max_trans_size;
126 uint32_t max_read_size;
127 uint32_t max_write_size;
128 NTTIME system_time;
129 NTTIME start_time;
130 DATA_BLOB gss_blob;
131 uint16_t sign_algo;
132 uint16_t cipher;
133 bool smb311_posix;
134 } server;
135
136 uint64_t mid;
137 uint16_t cur_credits;
138 uint16_t max_credits;
139
140 uint32_t cc_chunk_len;
141 uint32_t cc_max_chunks;
142
143 uint8_t io_priority;
144
145 bool force_channel_sequence;
146
147 uint8_t preauth_sha512[64];
148 } smb2;
149
150 struct smbXcli_session *sessions;
151 };
152
153 struct smb2cli_session {
154 uint64_t session_id;
155 uint16_t session_flags;
156 struct smb2_signing_key *application_key;
157 struct smb2_signing_key *signing_key;
158 bool should_sign;
159 bool should_encrypt;
160 struct smb2_signing_key *encryption_key;
161 struct smb2_signing_key *decryption_key;
162 uint64_t nonce_high_random;
163 uint64_t nonce_high_max;
164 uint64_t nonce_high;
165 uint64_t nonce_low;
166 uint16_t channel_sequence;
167 bool replay_active;
168 bool require_signed_response;
169
170 /*
171 * The following are just for torture tests
172 */
173 bool anonymous_signing;
174 bool anonymous_encryption;
175 bool no_signing_disconnect;
176 };
177
178 struct smbXcli_session {
179 struct smbXcli_session *prev, *next;
180 struct smbXcli_conn *conn;
181
182 struct {
183 uint16_t session_id;
184 uint16_t action;
185 DATA_BLOB application_key;
186 bool protected_key;
187 } smb1;
188
189 struct smb2cli_session *smb2;
190
191 struct {
192 struct smb2_signing_key *signing_key;
193 uint8_t preauth_sha512[64];
194 } smb2_channel;
195
196 /*
197 * this should be a short term hack
198 * until the upper layers have implemented
199 * re-authentication.
200 */
201 bool disconnect_expired;
202 };
203
204 struct smbXcli_tcon {
205 bool is_smb1;
206 uint32_t fs_attributes;
207
208 struct {
209 uint16_t tcon_id;
210 uint16_t optional_support;
211 uint32_t maximal_access;
212 uint32_t guest_maximal_access;
213 char *service;
214 char *fs_type;
215 } smb1;
216
217 struct {
218 uint32_t tcon_id;
219 uint8_t type;
220 uint32_t flags;
221 uint32_t capabilities;
222 uint32_t maximal_access;
223 bool should_sign;
224 bool should_encrypt;
225 } smb2;
226 };
227
228 struct smbXcli_req_state {
229 struct tevent_context *ev;
230 struct smbXcli_conn *conn;
231 struct smbXcli_session *session; /* maybe NULL */
232 struct smbXcli_tcon *tcon; /* maybe NULL */
233
234 uint8_t length_hdr[4];
235
236 bool one_way;
237
238 uint8_t *inbuf;
239
240 struct tevent_req *write_req;
241
242 struct timeval endtime;
243
244 struct {
245 /* Space for the header including the wct */
246 uint8_t hdr[HDR_VWV];
247
248 /*
249 * For normal requests, smb1cli_req_send chooses a mid.
250 * SecondaryV trans requests need to use the mid of the primary
251 * request, so we need a place to store it.
252 * Assume it is set if != 0.
253 */
254 uint16_t mid;
255
256 uint16_t *vwv;
257 uint8_t bytecount_buf[2];
258
259 #define MAX_SMB_IOV 10
260 /* length_hdr, hdr, words, byte_count, buffers */
261 struct iovec iov[1 + 3 + MAX_SMB_IOV];
262 int iov_count;
263
264 bool one_way_seqnum;
265 uint32_t seqnum;
266 struct tevent_req **chained_requests;
267
268 uint8_t recv_cmd;
269 NTSTATUS recv_status;
270 /* always an array of 3 talloc elements */
271 struct iovec *recv_iov;
272 } smb1;
273
274 struct {
275 const uint8_t *fixed;
276 uint16_t fixed_len;
277 const uint8_t *dyn;
278 uint32_t dyn_len;
279
280 uint8_t transform[SMB2_TF_HDR_SIZE];
281 uint8_t hdr[SMB2_HDR_BODY];
282 uint8_t pad[7]; /* padding space for compounding */
283
284 /*
285 * always an array of 3 talloc elements
286 * (without a SMB2_TRANSFORM header!)
287 *
288 * HDR, BODY, DYN
289 */
290 struct iovec *recv_iov;
291
292 /*
293 * the expected max for the response dyn_len
294 */
295 uint32_t max_dyn_len;
296
297 uint16_t credit_charge;
298
299 bool should_sign;
300 bool should_encrypt;
301 uint64_t encryption_session_id;
302
303 bool signing_skipped;
304 bool require_signed_response;
305 bool notify_async;
306 bool got_async;
307 uint16_t cancel_flags;
308 uint64_t cancel_mid;
309 uint64_t cancel_aid;
310 } smb2;
311 };
312
313 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
314 {
315 /*
316 * NT_STATUS_OK, means we do not notify the callers
317 */
318 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
319
320 while (conn->sessions) {
321 conn->sessions->conn = NULL;
322 DLIST_REMOVE(conn->sessions, conn->sessions);
323 }
324
325 if (conn->smb1.trans_enc) {
326 TALLOC_FREE(conn->smb1.trans_enc);
327 }
328
329 return 0;
330 }
331
332 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
333 int fd,
334 const char *remote_name,
335 enum smb_signing_setting signing_state,
336 uint32_t smb1_capabilities,
337 struct GUID *client_guid,
338 uint32_t smb2_capabilities,
339 const struct smb311_capabilities *smb3_capabilities)
340 {
341 struct smbXcli_conn *conn = NULL;
342 void *ss = NULL;
343 struct sockaddr *sa = NULL;
344 socklen_t sa_length;
345 int ret;
346
347 if (smb3_capabilities != NULL) {
348 const struct smb3_signing_capabilities *sign_algos =
349 &smb3_capabilities->signing;
350 const struct smb3_encryption_capabilities *ciphers =
351 &smb3_capabilities->encryption;
352
353 SMB_ASSERT(sign_algos->num_algos <= SMB3_SIGNING_CAPABILITIES_MAX_ALGOS);
354 SMB_ASSERT(ciphers->num_algos <= SMB3_ENCRYTION_CAPABILITIES_MAX_ALGOS);
355 }
356
357 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
358 if (!conn) {
359 return NULL;
360 }
361
362 ret = set_blocking(fd, false);
363 if (ret < 0) {
364 goto error;
365 }
366 conn->sock_fd = fd;
367
368 conn->remote_name = talloc_strdup(conn, remote_name);
369 if (conn->remote_name == NULL) {
370 goto error;
371 }
372
373 ss = (void *)&conn->local_ss;
374 sa = (struct sockaddr *)ss;
375 sa_length = sizeof(conn->local_ss);
376 ret = getsockname(fd, sa, &sa_length);
377 if (ret == -1) {
378 goto error;
379 }
380 ss = (void *)&conn->remote_ss;
381 sa = (struct sockaddr *)ss;
382 sa_length = sizeof(conn->remote_ss);
383 ret = getpeername(fd, sa, &sa_length);
384 if (ret == -1) {
385 goto error;
386 }
387
388 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
389 if (conn->outgoing == NULL) {
390 goto error;
391 }
392 conn->pending = NULL;
393
394 conn->min_protocol = PROTOCOL_NONE;
395 conn->max_protocol = PROTOCOL_NONE;
396 conn->protocol = PROTOCOL_NONE;
397
398 switch (signing_state) {
399 case SMB_SIGNING_OFF:
400 /* never */
401 conn->allow_signing = false;
402 conn->desire_signing = false;
403 conn->mandatory_signing = false;
404 break;
405 case SMB_SIGNING_DEFAULT:
406 case SMB_SIGNING_IF_REQUIRED:
407 /* if the server requires it */
408 conn->allow_signing = true;
409 conn->desire_signing = false;
410 conn->mandatory_signing = false;
411 break;
412 case SMB_SIGNING_DESIRED:
413 /* if the server desires it */
414 conn->allow_signing = true;
415 conn->desire_signing = true;
416 conn->mandatory_signing = false;
417 break;
418 case SMB_SIGNING_IPC_DEFAULT:
419 case SMB_SIGNING_REQUIRED:
420 /* always */
421 conn->allow_signing = true;
422 conn->desire_signing = true;
423 conn->mandatory_signing = true;
424 break;
425 }
426
427 conn->smb1.client.capabilities = smb1_capabilities;
428 conn->smb1.client.max_xmit = UINT16_MAX;
429
430 conn->smb1.capabilities = conn->smb1.client.capabilities;
431 conn->smb1.max_xmit = 1024;
432
433 conn->smb1.mid = 1;
434
435 /* initialise signing */
436 conn->smb1.signing = smb1_signing_init(conn,
437 conn->allow_signing,
438 conn->desire_signing,
439 conn->mandatory_signing);
440 if (!conn->smb1.signing) {
441 goto error;
442 }
443
444 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
445 if (conn->mandatory_signing) {
446 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
447 }
448 if (client_guid) {
449 conn->smb2.client.guid = *client_guid;
450 }
451 conn->smb2.client.capabilities = smb2_capabilities;
452 if (smb3_capabilities != NULL) {
453 conn->smb2.client.smb3_capabilities = *smb3_capabilities;
454 }
455
456 conn->smb2.cur_credits = 1;
457 conn->smb2.max_credits = 0;
458 conn->smb2.io_priority = 1;
459
460 /*
461 * Samba and Windows servers accept a maximum of 16 MiB with a maximum
462 * chunk length of 1 MiB.
463 */
464 conn->smb2.cc_chunk_len = 1024 * 1024;
465 conn->smb2.cc_max_chunks = 16;
466
467 talloc_set_destructor(conn, smbXcli_conn_destructor);
468 return conn;
469
470 error:
471 TALLOC_FREE(conn);
472 return NULL;
473 }
474
475 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
476 {
477 if (conn == NULL) {
478 return false;
479 }
480
481 if (conn->sock_fd == -1) {
482 return false;
483 }
484
485 return true;
486 }
487
488 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
489 {
490 return conn->protocol;
491 }
492
493 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
494 {
495 if (conn->protocol >= PROTOCOL_SMB2_02) {
496 return true;
497 }
498
499 if (conn->smb1.capabilities & CAP_UNICODE) {
500 return true;
501 }
502
503 return false;
504 }
505
506 bool smbXcli_conn_signing_mandatory(struct smbXcli_conn *conn)
507 {
508 return conn->mandatory_signing;
509 }
510
511 bool smbXcli_conn_have_posix(struct smbXcli_conn *conn)
512 {
513 if (conn->protocol >= PROTOCOL_SMB3_11) {
514 return conn->smb2.server.smb311_posix;
515 }
516 if (conn->protocol <= PROTOCOL_NT1) {
517 return (conn->smb1.capabilities & CAP_UNIX);
518 }
519 return false;
520 }
521
522 /*
523 * [MS-SMB] 2.2.2.3.5 - SMB1 support for passing through
524 * query/set commands to the file system
525 */
526 bool smbXcli_conn_support_passthrough(struct smbXcli_conn *conn)
527 {
528 if (conn->protocol >= PROTOCOL_SMB2_02) {
529 return true;
530 }
531
532 if (conn->smb1.capabilities & CAP_W2K_SMBS) {
533 return true;
534 }
535
536 return false;
537 }
538
539 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
540 {
541 set_socket_options(conn->sock_fd, options);
542 }
543
544 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
545 {
546 return &conn->local_ss;
547 }
548
549 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
550 {
551 return &conn->remote_ss;
552 }
553
554 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
555 {
556 return conn->remote_name;
557 }
558
559 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
560 {
561 if (conn->protocol >= PROTOCOL_SMB2_02) {
562 /*
563 * TODO...
564 */
565 return 1;
566 }
567
568 return conn->smb1.server.max_mux;
569 }
570
571 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
572 {
573 if (conn->protocol >= PROTOCOL_SMB2_02) {
574 return conn->smb2.server.system_time;
575 }
576
577 return conn->smb1.server.system_time;
578 }
579
580 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
581 {
582 if (conn->protocol >= PROTOCOL_SMB2_02) {
583 return &conn->smb2.server.gss_blob;
584 }
585
586 return &conn->smb1.server.gss_blob;
587 }
588
589 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
590 {
591 if (conn->protocol >= PROTOCOL_SMB2_02) {
592 return &conn->smb2.server.guid;
593 }
594
595 return &conn->smb1.server.guid;
596 }
597
598 bool smbXcli_conn_get_force_channel_sequence(struct smbXcli_conn *conn)
599 {
600 return conn->smb2.force_channel_sequence;
601 }
602
603 void smbXcli_conn_set_force_channel_sequence(struct smbXcli_conn *conn,
604 bool v)
605 {
606 conn->smb2.force_channel_sequence = v;
607 }
608
609 struct smbXcli_conn_samba_suicide_state {
610 struct smbXcli_conn *conn;
611 struct iovec iov;
612 uint8_t buf[9];
613 struct tevent_req *write_req;
614 };
615
616 static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
617 enum tevent_req_state req_state);
618 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
619
620 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
621 struct tevent_context *ev,
622 struct smbXcli_conn *conn,
623 uint8_t exitcode)
624 {
625 struct tevent_req *req, *subreq;
626 struct smbXcli_conn_samba_suicide_state *state;
627
628 req = tevent_req_create(mem_ctx, &state,
629 struct smbXcli_conn_samba_suicide_state);
630 if (req == NULL) {
631 return NULL;
632 }
633 state->conn = conn;
634 SIVAL(state->buf, 4, SMB_SUICIDE_PACKET);
635 SCVAL(state->buf, 8, exitcode);
636 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
637
638 if (conn->suicide_req != NULL) {
639 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
640 return tevent_req_post(req, ev);
641 }
642
643 state->iov.iov_base = state->buf;
644 state->iov.iov_len = sizeof(state->buf);
645
646 subreq = writev_send(state, ev, conn->outgoing, conn->sock_fd,
647 false, &state->iov, 1);
648 if (tevent_req_nomem(subreq, req)) {
649 return tevent_req_post(req, ev);
650 }
651 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
652 state->write_req = subreq;
653
654 tevent_req_set_cleanup_fn(req, smbXcli_conn_samba_suicide_cleanup);
655
656 /*
657 * We need to use tevent_req_defer_callback()
658 * in order to allow smbXcli_conn_disconnect()
659 * to do a safe cleanup.
660 */
661 tevent_req_defer_callback(req, ev);
662 conn->suicide_req = req;
663
664 return req;
665 }
666
667 static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
668 enum tevent_req_state req_state)
669 {
670 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
671 req, struct smbXcli_conn_samba_suicide_state);
672
673 TALLOC_FREE(state->write_req);
674
675 if (state->conn == NULL) {
676 return;
677 }
678
679 if (state->conn->suicide_req == req) {
680 state->conn->suicide_req = NULL;
681 }
682 state->conn = NULL;
683 }
684
685 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
686 {
687 struct tevent_req *req = tevent_req_callback_data(
688 subreq, struct tevent_req);
689 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
690 req, struct smbXcli_conn_samba_suicide_state);
691 ssize_t nwritten;
692 int err;
693
694 state->write_req = NULL;
695
696 nwritten = writev_recv(subreq, &err);
697 TALLOC_FREE(subreq);
698 if (nwritten == -1) {
699 /* here, we need to notify all pending requests */
700 NTSTATUS status = map_nt_error_from_unix_common(err);
701 smbXcli_conn_disconnect(state->conn, status);
702 return;
703 }
704 tevent_req_done(req);
705 }
706
707 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
708 {
709 return tevent_req_simple_recv_ntstatus(req);
710 }
711
712 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
713 uint8_t exitcode)
714 {
715 TALLOC_CTX *frame = talloc_stackframe();
716 struct tevent_context *ev;
717 struct tevent_req *req;
718 NTSTATUS status = NT_STATUS_NO_MEMORY;
719 bool ok;
720
721 if (smbXcli_conn_has_async_calls(conn)) {
722 /*
723 * Can't use sync call while an async call is in flight
724 */
725 status = NT_STATUS_INVALID_PARAMETER_MIX;
726 goto fail;
727 }
728 ev = samba_tevent_context_init(frame);
729 if (ev == NULL) {
730 goto fail;
731 }
732 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
733 if (req == NULL) {
734 goto fail;
735 }
736 ok = tevent_req_poll_ntstatus(req, ev, &status);
737 if (!ok) {
738 goto fail;
739 }
740 status = smbXcli_conn_samba_suicide_recv(req);
741 fail:
742 TALLOC_FREE(frame);
743 return status;
744 }
745
746 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
747 {
748 return conn->smb1.capabilities;
749 }
750
751 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
752 {
753 return conn->smb1.max_xmit;
754 }
755
756 bool smb1cli_conn_req_possible(struct smbXcli_conn *conn)
757 {
758 size_t pending = talloc_array_length(conn->pending);
759 uint16_t possible = conn->smb1.server.max_mux;
760
761 if (pending >= possible) {
762 return false;
763 }
764
765 return true;
766 }
767
768 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
769 {
770 return conn->smb1.server.session_key;
771 }
772
773 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
774 {
775 return conn->smb1.server.challenge;
776 }
777
778 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
779 {
780 return conn->smb1.server.security_mode;
781 }
782
783 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
784 {
785 return conn->smb1.server.readbraw;
786 }
787
788 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
789 {
790 return conn->smb1.server.writebraw;
791 }
792
793 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
794 {
795 return conn->smb1.server.lockread;
796 }
797
798 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
799 {
800 return conn->smb1.server.writeunlock;
801 }
802
803 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
804 {
805 return conn->smb1.server.time_zone;
806 }
807
808 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
809 const DATA_BLOB user_session_key,
810 const DATA_BLOB response)
811 {
812 return smb1_signing_activate(conn->smb1.signing,
813 user_session_key,
814 response);
815 }
816
817 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
818 const uint8_t *buf, uint32_t seqnum)
819 {
820 const uint8_t *hdr = buf + NBT_HDR_SIZE;
821 size_t len = smb_len_nbt(buf);
822
823 return smb1_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
824 }
825
826 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
827 {
828 return smb1_signing_is_active(conn->smb1.signing);
829 }
830
831 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
832 struct smb_trans_enc_state *es)
833 {
834 /* Replace the old state, if any. */
835 if (conn->smb1.trans_enc) {
836 TALLOC_FREE(conn->smb1.trans_enc);
837 }
838 conn->smb1.trans_enc = es;
839 }
840
841 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
842 {
843 return common_encryption_on(conn->smb1.trans_enc);
844 }
845
846
847 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
848 {
849 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
850 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
851
852 if (NT_STATUS_IS_OK(status)) {
853 return NT_STATUS_OK;
854 }
855
856 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
857 return status;
858 }
859
860 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
861 }
862
863 /**
864 * Is the SMB command able to hold an AND_X successor
865 * @param[in] cmd The SMB command in question
866 * @retval Can we add a chained request after "cmd"?
867 */
868 bool smb1cli_is_andx_req(uint8_t cmd)
869 {
870 switch (cmd) {
871 case SMBtconX:
872 case SMBlockingX:
873 case SMBopenX:
874 case SMBreadX:
875 case SMBwriteX:
876 case SMBsesssetupX:
877 case SMBulogoffX:
878 case SMBntcreateX:
879 return true;
880 break;
881 default:
882 break;
883 }
884
885 return false;
886 }
887
888 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
889 {
890 size_t num_pending = talloc_array_length(conn->pending);
891 uint16_t result;
892
893 if (conn->protocol == PROTOCOL_NONE) {
894 /*
895 * This is what windows sends on the SMB1 Negprot request
896 * and some vendors reuse the SMB1 MID as SMB2 sequence number.
897 */
898 return 0;
899 }
900
901 while (true) {
902 size_t i;
903
904 result = conn->smb1.mid++;
905 if ((result == 0) || (result == 0xffff)) {
906 continue;
907 }
908
909 for (i=0; i<num_pending; i++) {
910 if (result == smb1cli_req_mid(conn->pending[i])) {
911 break;
912 }
913 }
914
915 if (i == num_pending) {
916 return result;
917 }
918 }
919 }
920
921 static NTSTATUS smbXcli_req_cancel_write_req(struct tevent_req *req)
922 {
923 struct smbXcli_req_state *state =
924 tevent_req_data(req,
925 struct smbXcli_req_state);
926 struct smbXcli_conn *conn = state->conn;
927 size_t num_pending = talloc_array_length(conn->pending);
928 ssize_t ret;
929 int err;
930 bool ok;
931
932 if (state->write_req == NULL) {
933 return NT_STATUS_OK;
934 }
935
936 /*
937 * Check if it's possible to cancel the request.
938 * If the result is true it's not too late.
939 * See writev_cancel().
940 */
941 ok = tevent_req_cancel(state->write_req);
942 if (ok) {
943 TALLOC_FREE(state->write_req);
944
945 if (conn->protocol >= PROTOCOL_SMB2_02) {
946 /*
947 * SMB2 has a sane signing state.
948 */
949 return NT_STATUS_OK;
950 }
951
952 if (num_pending > 1) {
953 /*
954 * We have more pending requests following us. This
955 * means the signing state will be broken for them.
956 *
957 * As a solution we could add the requests directly to
958 * our outgoing queue and do the signing in the trigger
959 * function and then use writev_send() without passing a
960 * queue. That way we'll only sign packets we're most
961 * likely send to the wire.
962 */
963 return NT_STATUS_REQUEST_OUT_OF_SEQUENCE;
964 }
965
966 /*
967 * If we're the only request that's
968 * pending, we're able to recover the signing
969 * state.
970 */
971 smb1_signing_cancel_reply(conn->smb1.signing,
972 state->smb1.one_way_seqnum);
973 return NT_STATUS_OK;
974 }
975
976 ret = writev_recv(state->write_req, &err);
977 TALLOC_FREE(state->write_req);
978 if (ret == -1) {
979 return map_nt_error_from_unix_common(err);
980 }
981
982 return NT_STATUS_OK;
983 }
984
985 void smbXcli_req_unset_pending(struct tevent_req *req)
986 {
987 struct smbXcli_req_state *state =
988 tevent_req_data(req,
989 struct smbXcli_req_state);
990 struct smbXcli_conn *conn = state->conn;
991 size_t num_pending = talloc_array_length(conn->pending);
992 size_t i;
993 NTSTATUS cancel_status;
994
995 cancel_status = smbXcli_req_cancel_write_req(req);
996
997 if (state->smb1.mid != 0) {
998 /*
999 * This is a [nt]trans[2] request which waits
1000 * for more than one reply.
1001 */
1002 if (!NT_STATUS_IS_OK(cancel_status)) {
1003 /*
1004 * If the write_req cancel didn't work
1005 * we can't use the connection anymore.
1006 */
1007 smbXcli_conn_disconnect(conn, cancel_status);
1008 return;
1009 }
1010 return;
1011 }
1012
1013 tevent_req_set_cleanup_fn(req, NULL);
1014
1015 if (num_pending == 1) {
1016 /*
1017 * The pending read_smb tevent_req is a child of
1018 * conn->pending. So if nothing is pending anymore, we need to
1019 * delete the socket read fde.
1020 */
1021 /* TODO: smbXcli_conn_cancel_read_req */
1022 TALLOC_FREE(conn->pending);
1023 conn->read_smb_req = NULL;
1024
1025 if (!NT_STATUS_IS_OK(cancel_status)) {
1026 /*
1027 * If the write_req cancel didn't work
1028 * we can't use the connection anymore.
1029 */
1030 smbXcli_conn_disconnect(conn, cancel_status);
1031 return;
1032 }
1033 return;
1034 }
1035
1036 for (i=0; i<num_pending; i++) {
1037 if (req == conn->pending[i]) {
1038 break;
1039 }
1040 }
1041 if (i == num_pending) {
1042 /*
1043 * Something's seriously broken. Just returning here is the
1044 * right thing nevertheless, the point of this routine is to
1045 * remove ourselves from conn->pending.
1046 */
1047
1048 if (!NT_STATUS_IS_OK(cancel_status)) {
1049 /*
1050 * If the write_req cancel didn't work
1051 * we can't use the connection anymore.
1052 */
1053 smbXcli_conn_disconnect(conn, cancel_status);
1054 return;
1055 }
1056 return;
1057 }
1058
1059 /*
1060 * Remove ourselves from the conn->pending array
1061 */
1062 for (; i < (num_pending - 1); i++) {
1063 conn->pending[i] = conn->pending[i+1];
1064 }
1065
1066 /*
1067 * No NULL check here, we're shrinking by sizeof(void *), and
1068 * talloc_realloc just adjusts the size for this.
1069 */
1070 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
1071 num_pending - 1);
1072
1073 if (!NT_STATUS_IS_OK(cancel_status)) {
1074 /*
1075 * If the write_req cancel didn't work
1076 * we can't use the connection anymore.
1077 */
1078 smbXcli_conn_disconnect(conn, cancel_status);
1079 return;
1080 }
1081 return;
1082 }
1083
1084 static void smbXcli_req_cleanup(struct tevent_req *req,
1085 enum tevent_req_state req_state)
1086 {
1087 struct smbXcli_req_state *state =
1088 tevent_req_data(req,
1089 struct smbXcli_req_state);
1090 struct smbXcli_conn *conn = state->conn;
1091 NTSTATUS cancel_status;
1092
1093 switch (req_state) {
1094 case TEVENT_REQ_RECEIVED:
1095 /*
1096 * Make sure we really remove it from
1097 * the pending array on destruction.
1098 *
1099 * smbXcli_req_unset_pending() calls
1100 * smbXcli_req_cancel_write_req() internal
1101 */
1102 state->smb1.mid = 0;
1103 smbXcli_req_unset_pending(req);
1104 return;
1105 default:
1106 cancel_status = smbXcli_req_cancel_write_req(req);
1107 if (!NT_STATUS_IS_OK(cancel_status)) {
1108 /*
1109 * If the write_req cancel didn't work
1110 * we can't use the connection anymore.
1111 */
1112 smbXcli_conn_disconnect(conn, cancel_status);
1113 return;
1114 }
1115 return;
1116 }
1117 }
1118
1119 static bool smb1cli_req_cancel(struct tevent_req *req);
1120 static bool smb2cli_req_cancel(struct tevent_req *req);
1121
1122 static bool smbXcli_req_cancel(struct tevent_req *req)
1123 {
1124 struct smbXcli_req_state *state =
1125 tevent_req_data(req,
1126 struct smbXcli_req_state);
1127
1128 if (!smbXcli_conn_is_connected(state->conn)) {
1129 return false;
1130 }
1131
1132 if (state->conn->protocol == PROTOCOL_NONE) {
1133 return false;
1134 }
1135
1136 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
1137 return smb2cli_req_cancel(req);
1138 }
1139
1140 return smb1cli_req_cancel(req);
1141 }
1142
1143 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
1144
1145 bool smbXcli_req_set_pending(struct tevent_req *req)
1146 {
1147 struct smbXcli_req_state *state =
1148 tevent_req_data(req,
1149 struct smbXcli_req_state);
1150 struct smbXcli_conn *conn;
1151 struct tevent_req **pending;
1152 size_t num_pending;
1153
1154 conn = state->conn;
1155
1156 if (!smbXcli_conn_is_connected(conn)) {
1157 return false;
1158 }
1159
1160 num_pending = talloc_array_length(conn->pending);
1161
1162 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
1163 num_pending+1);
1164 if (pending == NULL) {
1165 return false;
1166 }
1167 pending[num_pending] = req;
1168 conn->pending = pending;
1169 tevent_req_set_cleanup_fn(req, smbXcli_req_cleanup);
1170 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1171
1172 if (!smbXcli_conn_receive_next(conn)) {
1173 /*
1174 * the caller should notify the current request
1175 *
1176 * And all other pending requests get notified
1177 * by smbXcli_conn_disconnect().
1178 */
1179 smbXcli_req_unset_pending(req);
1180 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1181 return false;
1182 }
1183
1184 return true;
1185 }
1186
1187 static void smbXcli_conn_received(struct tevent_req *subreq);
1188
1189 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
1190 {
1191 size_t num_pending = talloc_array_length(conn->pending);
1192 struct tevent_req *req;
1193 struct smbXcli_req_state *state;
1194
1195 if (conn->read_smb_req != NULL) {
1196 return true;
1197 }
1198
1199 if (num_pending == 0) {
1200 if (conn->smb2.mid < UINT64_MAX) {
1201 /* no more pending requests, so we are done for now */
1202 return true;
1203 }
1204
1205 /*
1206 * If there are no more SMB2 requests possible,
1207 * because we are out of message ids,
1208 * we need to disconnect.
1209 */
1210 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
1211 return true;
1212 }
1213
1214 req = conn->pending[0];
1215 state = tevent_req_data(req, struct smbXcli_req_state);
1216
1217 /*
1218 * We're the first ones, add the read_smb request that waits for the
1219 * answer from the server
1220 */
1221 conn->read_smb_req = read_smb_send(conn->pending,
1222 state->ev,
1223 conn->sock_fd);
1224 if (conn->read_smb_req == NULL) {
1225 return false;
1226 }
1227 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
1228 return true;
1229 }
1230
1231 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
1232 {
1233 struct smbXcli_session *session;
1234 int sock_fd = conn->sock_fd;
1235
1236 tevent_queue_stop(conn->outgoing);
1237
1238 conn->sock_fd = -1;
1239
1240 session = conn->sessions;
1241 if (talloc_array_length(conn->pending) == 0) {
1242 /*
1243 * if we do not have pending requests
1244 * there is no need to update the channel_sequence
1245 */
1246 session = NULL;
1247 }
1248 for (; session; session = session->next) {
1249 smb2cli_session_increment_channel_sequence(session);
1250 }
1251
1252 if (conn->suicide_req != NULL) {
1253 /*
1254 * smbXcli_conn_samba_suicide_send()
1255 * used tevent_req_defer_callback() already.
1256 */
1257 if (!NT_STATUS_IS_OK(status)) {
1258 tevent_req_nterror(conn->suicide_req, status);
1259 }
1260 conn->suicide_req = NULL;
1261 }
1262
1263 /*
1264 * Cancel all pending requests. We do not do a for-loop walking
1265 * conn->pending because that array changes in
1266 * smbXcli_req_unset_pending.
1267 */
1268 while (conn->pending != NULL &&
1269 talloc_array_length(conn->pending) > 0) {
1270 struct tevent_req *req;
1271 struct smbXcli_req_state *state;
1272 struct tevent_req **chain;
1273 size_t num_chained;
1274 size_t i;
1275
1276 req = conn->pending[0];
1277 state = tevent_req_data(req, struct smbXcli_req_state);
1278
1279 if (state->smb1.chained_requests == NULL) {
1280 bool in_progress;
1281
1282 /*
1283 * We're dead. No point waiting for trans2
1284 * replies.
1285 */
1286 state->smb1.mid = 0;
1287
1288 smbXcli_req_unset_pending(req);
1289
1290 if (NT_STATUS_IS_OK(status)) {
1291 /* do not notify the callers */
1292 continue;
1293 }
1294
1295 in_progress = tevent_req_is_in_progress(req);
1296 if (!in_progress) {
1297 /*
1298 * already finished
1299 */
1300 continue;
1301 }
1302
1303 /*
1304 * we need to defer the callback, because we may notify
1305 * more then one caller.
1306 */
1307 tevent_req_defer_callback(req, state->ev);
1308 tevent_req_nterror(req, status);
1309 continue;
1310 }
1311
1312 chain = talloc_move(conn, &state->smb1.chained_requests);
1313 num_chained = talloc_array_length(chain);
1314
1315 for (i=0; i<num_chained; i++) {
1316 bool in_progress;
1317
1318 req = chain[i];
1319 state = tevent_req_data(req, struct smbXcli_req_state);
1320
1321 /*
1322 * We're dead. No point waiting for trans2
1323 * replies.
1324 */
1325 state->smb1.mid = 0;
1326
1327 smbXcli_req_unset_pending(req);
1328
1329 if (NT_STATUS_IS_OK(status)) {
1330 /* do not notify the callers */
1331 continue;
1332 }
1333
1334 in_progress = tevent_req_is_in_progress(req);
1335 if (!in_progress) {
1336 /*
1337 * already finished
1338 */
1339 continue;
1340 }
1341
1342 /*
1343 * we need to defer the callback, because we may notify
1344 * more than one caller.
1345 */
1346 tevent_req_defer_callback(req, state->ev);
1347 tevent_req_nterror(req, status);
1348 }
1349 TALLOC_FREE(chain);
1350 }
1351
1352 if (sock_fd != -1) {
1353 close(sock_fd);
1354 }
1355 }
1356
1357 /*
1358 * Fetch a smb request's mid. Only valid after the request has been sent by
1359 * smb1cli_req_send().
1360 */
1361 uint16_t smb1cli_req_mid(struct tevent_req *req)
1362 {
1363 struct smbXcli_req_state *state =
1364 tevent_req_data(req,
1365 struct smbXcli_req_state);
1366
1367 if (state->smb1.mid != 0) {
1368 return state->smb1.mid;
1369 }
1370
1371 return SVAL(state->smb1.hdr, HDR_MID);
1372 }
1373
1374 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1375 {
1376 struct smbXcli_req_state *state =
1377 tevent_req_data(req,
1378 struct smbXcli_req_state);
1379
1380 state->smb1.mid = mid;
1381 }
1382
1383 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1384 {
1385 struct smbXcli_req_state *state =
1386 tevent_req_data(req,
1387 struct smbXcli_req_state);
1388
1389 return state->smb1.seqnum;
1390 }
1391
1392 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1393 {
1394 struct smbXcli_req_state *state =
1395 tevent_req_data(req,
1396 struct smbXcli_req_state);
1397
1398 state->smb1.seqnum = seqnum;
1399 }
1400
1401 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1402 {
1403 ssize_t ret = iov_buflen(iov, count);
1404
1405 /* Ignore the overflow case for now ... */
1406 return ret;
1407 }
1408
1409 static void smb1cli_req_flags(enum protocol_types protocol,
1410 uint32_t smb1_capabilities,
1411 uint8_t smb_command,
1412 uint8_t additional_flags,
1413 uint8_t clear_flags,
1414 uint8_t *_flags,
1415 uint16_t additional_flags2,
1416 uint16_t clear_flags2,
1417 uint16_t *_flags2)
1418 {
1419 uint8_t flags = 0;
1420 uint16_t flags2 = 0;
1421
1422 if (protocol >= PROTOCOL_LANMAN1) {
1423 flags |= FLAG_CASELESS_PATHNAMES;
1424 flags |= FLAG_CANONICAL_PATHNAMES;
1425 }
1426
1427 if (protocol >= PROTOCOL_LANMAN2) {
1428 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1429 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1430 }
1431
1432 if (protocol >= PROTOCOL_NT1) {
1433 flags2 |= FLAGS2_IS_LONG_NAME;
1434
1435 if (smb1_capabilities & CAP_UNICODE) {
1436 flags2 |= FLAGS2_UNICODE_STRINGS;
1437 }
1438 if (smb1_capabilities & CAP_STATUS32) {
1439 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1440 }
1441 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1442 flags2 |= FLAGS2_EXTENDED_SECURITY;
1443 }
1444 }
1445
1446 flags |= additional_flags;
1447 flags &= ~clear_flags;
1448 flags2 |= additional_flags2;
1449 flags2 &= ~clear_flags2;
1450
1451 *_flags = flags;
1452 *_flags2 = flags2;
1453 }
1454
1455 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1456
1457 static bool smb1cli_req_cancel(struct tevent_req *req)
1458 {
1459 struct smbXcli_req_state *state =
1460 tevent_req_data(req,
1461 struct smbXcli_req_state);
1462 uint8_t flags;
1463 uint16_t flags2;
1464 uint32_t pid;
1465 uint16_t mid;
1466 struct tevent_req *subreq;
1467 NTSTATUS status;
1468
1469 flags = CVAL(state->smb1.hdr, HDR_FLG);
1470 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1471 pid = SVAL(state->smb1.hdr, HDR_PID);
1472 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1473 mid = SVAL(state->smb1.hdr, HDR_MID);
1474
1475 subreq = smb1cli_req_create(state, state->ev,
1476 state->conn,
1477 SMBntcancel,
1478 flags, 0,
1479 flags2, 0,
1480 0, /* timeout */
1481 pid,
1482 state->tcon,
1483 state->session,
1484 0, NULL, /* vwv */
1485 0, NULL); /* bytes */
1486 if (subreq == NULL) {
1487 return false;
1488 }
1489 smb1cli_req_set_mid(subreq, mid);
1490
1491 status = smb1cli_req_chain_submit(&subreq, 1);
1492 if (!NT_STATUS_IS_OK(status)) {
1493 TALLOC_FREE(subreq);
1494 return false;
1495 }
1496 smb1cli_req_set_mid(subreq, 0);
1497
1498 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1499
1500 return true;
1501 }
1502
1503 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1504 {
1505 /* we do not care about the result */
1506 TALLOC_FREE(subreq);
1507 }
1508
1509 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1510 struct tevent_context *ev,
1511 struct smbXcli_conn *conn,
1512 uint8_t smb_command,
1513 uint8_t additional_flags,
1514 uint8_t clear_flags,
1515 uint16_t additional_flags2,
1516 uint16_t clear_flags2,
1517 uint32_t timeout_msec,
1518 uint32_t pid,
1519 struct smbXcli_tcon *tcon,
1520 struct smbXcli_session *session,
1521 uint8_t wct, uint16_t *vwv,
1522 int iov_count,
1523 struct iovec *bytes_iov)
1524 {
1525 struct tevent_req *req;
1526 struct smbXcli_req_state *state;
1527 uint8_t flags = 0;
1528 uint16_t flags2 = 0;
1529 uint16_t uid = 0;
1530 uint16_t tid = 0;
1531 ssize_t num_bytes;
1532
1533 if (iov_count > MAX_SMB_IOV) {
1534 /*
1535 * Should not happen :-)
1536 */
1537 return NULL;
1538 }
1539
1540 req = tevent_req_create(mem_ctx, &state,
1541 struct smbXcli_req_state);
1542 if (req == NULL) {
1543 return NULL;
1544 }
1545 state->ev = ev;
1546 state->conn = conn;
1547 state->session = session;
1548 state->tcon = tcon;
1549
1550 if (session) {
1551 uid = session->smb1.session_id;
1552 }
1553
1554 if (tcon) {
1555 tid = tcon->smb1.tcon_id;
1556
1557 if (tcon->fs_attributes & FILE_CASE_SENSITIVE_SEARCH) {
1558 clear_flags |= FLAG_CASELESS_PATHNAMES;
1559 } else {
1560 /* Default setting, case insensitive. */
1561 additional_flags |= FLAG_CASELESS_PATHNAMES;
1562 }
1563
1564 if (smbXcli_conn_dfs_supported(conn) &&
1565 smbXcli_tcon_is_dfs_share(tcon))
1566 {
1567 additional_flags2 |= FLAGS2_DFS_PATHNAMES;
1568 }
1569 }
1570
1571 state->smb1.recv_cmd = 0xFF;
1572 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1573 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1574 if (state->smb1.recv_iov == NULL) {
1575 TALLOC_FREE(req);
1576 return NULL;
1577 }
1578
1579 smb1cli_req_flags(conn->protocol,
1580 conn->smb1.capabilities,
1581 smb_command,
1582 additional_flags,
1583 clear_flags,
1584 &flags,
1585 additional_flags2,
1586 clear_flags2,
1587 &flags2);
1588
1589 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1590 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1591 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1592 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1593 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1594 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1595 SSVAL(state->smb1.hdr, HDR_TID, tid);
1596 SSVAL(state->smb1.hdr, HDR_PID, pid);
1597 SSVAL(state->smb1.hdr, HDR_UID, uid);
1598 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1599 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1600
1601 state->smb1.vwv = vwv;
1602
1603 num_bytes = iov_buflen(bytes_iov, iov_count);
1604 if (num_bytes == -1) {
1605 /*
1606 * I'd love to add a check for num_bytes<=UINT16_MAX here, but
1607 * the smbclient->samba connections can lie and transfer more.
1608 */
1609 TALLOC_FREE(req);
1610 return NULL;
1611 }
1612
1613 SSVAL(state->smb1.bytecount_buf, 0, num_bytes);
1614
1615 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1616 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1617 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1618 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1619 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1620 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1621 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1622 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1623
1624 if (iov_count != 0) {
1625 memcpy(&state->smb1.iov[4], bytes_iov,
1626 iov_count * sizeof(*bytes_iov));
1627 }
1628 state->smb1.iov_count = iov_count + 4;
1629
1630 if (timeout_msec > 0) {
1631 state->endtime = timeval_current_ofs_msec(timeout_msec);
1632 if (!tevent_req_set_endtime(req, ev, state->endtime)) {
1633 return req;
1634 }
1635 }
1636
1637 switch (smb_command) {
1638 case SMBtranss:
1639 case SMBtranss2:
1640 case SMBnttranss:
1641 state->one_way = true;
1642 break;
1643 case SMBntcancel:
1644 state->one_way = true;
1645 state->smb1.one_way_seqnum = true;
1646 break;
1647 case SMBlockingX:
1648 if ((wct == 8) &&
1649 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1650 state->one_way = true;
1651 }
1652 break;
1653 }
1654
1655 return req;
1656 }
1657
1658 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1659 struct iovec *iov, int iov_count,
1660 uint32_t *seqnum,
1661 bool one_way_seqnum)
1662 {
1663 TALLOC_CTX *frame = NULL;
1664 NTSTATUS status;
1665 uint8_t *buf;
1666
1667 /*
1668 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1669 * iovec directly. MD5Update would do that just fine.
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 frame = talloc_stackframe();
1689
1690 buf = iov_concat(frame, &iov[1], iov_count - 1);
1691 if (buf == NULL) {
1692 return NT_STATUS_NO_MEMORY;
1693 }
1694
1695 *seqnum = smb1_signing_next_seqnum(conn->smb1.signing,
1696 one_way_seqnum);
1697 status = smb1_signing_sign_pdu(conn->smb1.signing,
1698 buf,
1699 talloc_get_size(buf),
1700 *seqnum);
1701 if (!NT_STATUS_IS_OK(status)) {
1702 return status;
1703 }
1704 memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1705
1706 TALLOC_FREE(frame);
1707 return NT_STATUS_OK;
1708 }
1709
1710 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1711 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1712 TALLOC_CTX *tmp_mem,
1713 uint8_t *inbuf);
1714
1715 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1716 struct smbXcli_req_state *state,
1717 struct iovec *iov, int iov_count)
1718 {
1719 struct tevent_req *subreq;
1720 NTSTATUS status;
1721 uint8_t cmd;
1722 uint16_t mid;
1723 ssize_t nbtlen;
1724
1725 if (!smbXcli_conn_is_connected(state->conn)) {
1726 return NT_STATUS_CONNECTION_DISCONNECTED;
1727 }
1728
1729 if (state->conn->protocol > PROTOCOL_NT1) {
1730 DBG_ERR("called for dialect[%s] server[%s]\n",
1731 smb_protocol_types_string(state->conn->protocol),
1732 smbXcli_conn_remote_name(state->conn));
1733 return NT_STATUS_REVISION_MISMATCH;
1734 }
1735
1736 if (iov_count < 4) {
1737 return NT_STATUS_INVALID_PARAMETER_MIX;
1738 }
1739 if (iov[0].iov_len != NBT_HDR_SIZE) {
1740 return NT_STATUS_INVALID_PARAMETER_MIX;
1741 }
1742 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1743 return NT_STATUS_INVALID_PARAMETER_MIX;
1744 }
1745 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1746 return NT_STATUS_INVALID_PARAMETER_MIX;
1747 }
1748 if (iov[3].iov_len != sizeof(uint16_t)) {
1749 return NT_STATUS_INVALID_PARAMETER_MIX;
1750 }
1751
1752 cmd = CVAL(iov[1].iov_base, HDR_COM);
1753 if (cmd == SMBreadBraw) {
1754 if (smbXcli_conn_has_async_calls(state->conn)) {
1755 return NT_STATUS_INVALID_PARAMETER_MIX;
1756 }
1757 state->conn->smb1.read_braw_req = req;
1758 }
1759
1760 if (state->smb1.mid != 0) {
1761 mid = state->smb1.mid;
1762 } else {
1763 mid = smb1cli_alloc_mid(state->conn);
1764 }
1765 SSVAL(iov[1].iov_base, HDR_MID, mid);
1766
1767 nbtlen = iov_buflen(&iov[1], iov_count-1);
1768 if ((nbtlen == -1) || (nbtlen > 0x1FFFF)) {
1769 return NT_STATUS_INVALID_PARAMETER_MIX;
1770 }
1771
1772 _smb_setlen_nbt(iov[0].iov_base, nbtlen);
1773
1774 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1775 &state->smb1.seqnum,
1776 state->smb1.one_way_seqnum);
1777
1778 if (!NT_STATUS_IS_OK(status)) {
1779 return status;
1780 }
1781
1782 /*
1783 * If we supported multiple encryption contexts
1784 * here we'd look up based on tid.
1785 */
1786 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1787 char *buf, *enc_buf;
1788
1789 buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
1790 if (buf == NULL) {
1791 return NT_STATUS_NO_MEMORY;
1792 }
1793 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1794 (char *)buf, &enc_buf);
1795 TALLOC_FREE(buf);
1796 if (!NT_STATUS_IS_OK(status)) {
1797 DEBUG(0, ("Error in encrypting client message: %s\n",
1798 nt_errstr(status)));
1799 return status;
1800 }
1801 buf = (char *)talloc_memdup(state, enc_buf,
1802 smb_len_nbt(enc_buf)+4);
1803 SAFE_FREE(enc_buf);
1804 if (buf == NULL) {
1805 return NT_STATUS_NO_MEMORY;
1806 }
1807 iov[0].iov_base = (void *)buf;
1808 iov[0].iov_len = talloc_get_size(buf);
1809 iov_count = 1;
1810 }
1811
1812 if (state->conn->dispatch_incoming == NULL) {
1813 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1814 }
1815
1816 if (!smbXcli_req_set_pending(req)) {
1817 return NT_STATUS_NO_MEMORY;
1818 }
1819
1820 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1821
1822 subreq = writev_send(state, state->ev, state->conn->outgoing,
1823 state->conn->sock_fd, false, iov, iov_count);
1824 if (subreq == NULL) {
1825 return NT_STATUS_NO_MEMORY;
1826 }
1827 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1828 state->write_req = subreq;
1829
1830 return NT_STATUS_OK;
1831 }
1832
1833 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1834 struct tevent_context *ev,
1835 struct smbXcli_conn *conn,
1836 uint8_t smb_command,
1837 uint8_t additional_flags,
1838 uint8_t clear_flags,
1839 uint16_t additional_flags2,
1840 uint16_t clear_flags2,
1841 uint32_t timeout_msec,
1842 uint32_t pid,
1843 struct smbXcli_tcon *tcon,
1844 struct smbXcli_session *session,
1845 uint8_t wct, uint16_t *vwv,
1846 uint32_t num_bytes,
1847 const uint8_t *bytes)
1848 {
1849 struct tevent_req *req;
1850 struct iovec iov;
1851 NTSTATUS status;
1852
1853 iov.iov_base = discard_const_p(void, bytes);
1854 iov.iov_len = num_bytes;
1855
1856 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1857 additional_flags, clear_flags,
1858 additional_flags2, clear_flags2,
1859 timeout_msec,
1860 pid, tcon, session,
1861 wct, vwv, 1, &iov);
1862 if (req == NULL) {
1863 return NULL;
1864 }
1865 if (!tevent_req_is_in_progress(req)) {
1866 return tevent_req_post(req, ev);
1867 }
1868 status = smb1cli_req_chain_submit(&req, 1);
1869 if (tevent_req_nterror(req, status)) {
1870 return tevent_req_post(req, ev);
1871 }
1872 return req;
1873 }
1874
1875 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1876 {
1877 struct tevent_req *req =
1878 tevent_req_callback_data(subreq,
1879 struct tevent_req);
1880 struct smbXcli_req_state *state =
1881 tevent_req_data(req,
1882 struct smbXcli_req_state);
1883 ssize_t nwritten;
1884 int err;
1885
1886 state->write_req = NULL;
1887
1888 nwritten = writev_recv(subreq, &err);
1889 TALLOC_FREE(subreq);
1890 if (nwritten == -1) {
1891 /* here, we need to notify all pending requests */
1892 NTSTATUS status = map_nt_error_from_unix_common(err);
1893 smbXcli_conn_disconnect(state->conn, status);
1894 return;
1895 }
1896
1897 if (state->one_way) {
1898 state->inbuf = NULL;
1899 tevent_req_done(req);
1900 return;
1901 }
1902 }
1903
1904 static void smbXcli_conn_received(struct tevent_req *subreq)
1905 {
1906 struct smbXcli_conn *conn =
1907 tevent_req_callback_data(subreq,
1908 struct smbXcli_conn);
1909 TALLOC_CTX *frame = talloc_stackframe();
1910 NTSTATUS status;
1911 uint8_t *inbuf;
1912 ssize_t received;
1913 int err;
1914
1915 if (subreq != conn->read_smb_req) {
1916 DEBUG(1, ("Internal error: cli_smb_received called with "
1917 "unexpected subreq\n"));
1918 smbXcli_conn_disconnect(conn, NT_STATUS_INTERNAL_ERROR);
1919 TALLOC_FREE(frame);
1920 return;
1921 }
1922 conn->read_smb_req = NULL;
1923
1924 received = read_smb_recv(subreq, frame, &inbuf, &err);
1925 TALLOC_FREE(subreq);
1926 if (received == -1) {
1927 status = map_nt_error_from_unix_common(err);
1928 smbXcli_conn_disconnect(conn, status);
1929 TALLOC_FREE(frame);
1930 return;
1931 }
1932
1933 status = conn->dispatch_incoming(conn, frame, inbuf);
1934 TALLOC_FREE(frame);
1935 if (NT_STATUS_IS_OK(status)) {
1936 /*
1937 * We should not do any more processing
1938 * as the dispatch function called
1939 * tevent_req_done().
1940 */
1941 return;
1942 }
1943
1944 if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1945 /*
1946 * We got an error, so notify all pending requests
1947 */
1948 smbXcli_conn_disconnect(conn, status);
1949 return;
1950 }
1951
1952 /*
1953 * We got NT_STATUS_RETRY, so we may ask for a
1954 * next incoming pdu.
1955 */
1956 if (!smbXcli_conn_receive_next(conn)) {
1957 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1958 }
1959 }
1960
1961 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1962 struct iovec **piov, int *pnum_iov)
1963 {
1964 struct iovec *iov;
1965 size_t num_iov;
1966 size_t buflen;
1967 size_t taken;
1968 size_t remaining;
1969 uint8_t *hdr;
1970 uint8_t cmd;
1971 uint32_t wct_ofs;
1972 NTSTATUS status;
1973 size_t min_size = MIN_SMB_SIZE;
1974
1975 buflen = smb_len_tcp(buf);
1976 taken = 0;
1977
1978 hdr = buf + NBT_HDR_SIZE;
1979
1980 status = smb1cli_pull_raw_error(hdr);
1981 if (NT_STATUS_IS_ERR(status)) {
1982 /*
1983 * This is an ugly hack to support OS/2
1984 * which skips the byte_count in the DATA block
1985 * on some error responses.
1986 *
1987 * See bug #9096
1988 */
1989 min_size -= sizeof(uint16_t);
1990 }
1991
1992 if (buflen < min_size) {
1993 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1994 }
1995
1996 /*
1997 * This returns iovec elements in the following order:
1998 *
1999 * - SMB header
2000 *
2001 * - Parameter Block
2002 * - Data Block
2003 *
2004 * - Parameter Block
2005 * - Data Block
2006 *
2007 * - Parameter Block
2008 * - Data Block
2009 */
2010 num_iov = 1;
2011
2012 iov = talloc_array(mem_ctx, struct iovec, num_iov);
2013 if (iov == NULL) {
2014 return NT_STATUS_NO_MEMORY;
2015 }
2016 iov[0].iov_base = hdr;
2017 iov[0].iov_len = HDR_WCT;
2018 taken += HDR_WCT;
2019
2020 cmd = CVAL(hdr, HDR_COM);
2021 wct_ofs = HDR_WCT;
2022
2023 while (true) {
2024 size_t len = buflen - taken;
2025 struct iovec *cur;
2026 struct iovec *iov_tmp;
2027 uint8_t wct;
2028 uint32_t bcc_ofs;
2029 uint16_t bcc;
2030 size_t needed;
2031
2032 /*
2033 * we need at least WCT
2034 */
2035 needed = sizeof(uint8_t);
2036 if (len < needed) {
2037 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
2038 __location__, (int)len, (int)needed));
2039 goto inval;
2040 }
2041
2042 /*
2043 * Now we check if the specified words are there
2044 */
2045 wct = CVAL(hdr, wct_ofs);
2046 needed += wct * sizeof(uint16_t);
2047 if (len < needed) {
2048 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
2049 __location__, (int)len, (int)needed));
2050 goto inval;
2051 }
2052
2053 if ((num_iov == 1) &&
2054 (len == needed) &&
2055 NT_STATUS_IS_ERR(status))
2056 {
2057 /*
2058 * This is an ugly hack to support OS/2
2059 * which skips the byte_count in the DATA block
2060 * on some error responses.
2061 *
2062 * See bug #9096
2063 */
2064 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
2065 num_iov + 2);
2066 if (iov_tmp == NULL) {
2067 TALLOC_FREE(iov);
2068 return NT_STATUS_NO_MEMORY;
2069 }
2070 iov = iov_tmp;
2071 cur = &iov[num_iov];
2072 num_iov += 2;
2073
2074 cur[0].iov_len = 0;
2075 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
2076 cur[1].iov_len = 0;
2077 cur[1].iov_base = cur[0].iov_base;
2078
2079 taken += needed;
2080 break;
2081 }
2082
2083 /*
2084 * we need at least BCC
2085 */
2086 needed += sizeof(uint16_t);
2087 if (len < needed) {
2088 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
2089 __location__, (int)len, (int)needed));
2090 goto inval;
2091 }
2092
2093 /*
2094 * Now we check if the specified bytes are there
2095 */
2096 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
2097 bcc = SVAL(hdr, bcc_ofs);
2098 needed += bcc * sizeof(uint8_t);
2099 if (len < needed) {
2100 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
2101 __location__, (int)len, (int)needed));
2102 goto inval;
2103 }
2104
2105 /*
2106 * we allocate 2 iovec structures for words and bytes
2107 */
2108 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
2109 num_iov + 2);
2110 if (iov_tmp == NULL) {
2111 TALLOC_FREE(iov);
2112 return NT_STATUS_NO_MEMORY;
2113 }
2114 iov = iov_tmp;
2115 cur = &iov[num_iov];
2116 num_iov += 2;
2117
2118 cur[0].iov_len = wct * sizeof(uint16_t);
2119 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
2120 cur[1].iov_len = bcc * sizeof(uint8_t);
2121 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
2122
2123 taken += needed;
2124
2125 if (!smb1cli_is_andx_req(cmd)) {
2126 /*
2127 * If the current command does not have AndX chanining
2128 * we are done.
2129 */
2130 break;
2131 }
2132
2133 if (wct == 0 && bcc == 0) {
2134 /*
2135 * An empty response also ends the chain,
2136 * most likely with an error.
2137 */
2138 break;
2139 }
2140
2141 if (wct < 2) {
2142 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
2143 __location__, (int)wct, (int)cmd));
2144 goto inval;
2145 }
2146 cmd = CVAL(cur[0].iov_base, 0);
2147 if (cmd == 0xFF) {
2148 /*
2149 * If it is the end of the chain we are also done.
2150 */
2151 break;
2152 }
2153 wct_ofs = SVAL(cur[0].iov_base, 2);
2154
2155 if (wct_ofs < taken) {
2156 goto inval;
2157 }
2158 if (wct_ofs > buflen) {
2159 goto inval;
2160 }
2161
2162 /*
2163 * we consumed everything up to the start of the next
2164 * parameter block.
2165 */
2166 taken = wct_ofs;
2167 }
2168
2169 remaining = buflen - taken;
2170
2171 if (remaining > 0 && num_iov >= 3) {
2172 /*
2173 * The last DATA block gets the remaining
2174 * bytes, this is needed to support
2175 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
2176 */
2177 iov[num_iov-1].iov_len += remaining;
2178 }
2179
2180 *piov = iov;
2181 *pnum_iov = num_iov;
2182 return NT_STATUS_OK;
2183
2184 inval:
2185 TALLOC_FREE(iov);
2186 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2187 }
2188
2189 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2190 TALLOC_CTX *tmp_mem,
2191 uint8_t *inbuf)
2192 {
2193 struct tevent_req *req;
2194 struct smbXcli_req_state *state;
2195 NTSTATUS status;
2196 size_t num_pending;
2197 size_t i;
2198 uint8_t cmd;
2199 uint16_t mid;
2200 bool oplock_break;
2201 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
2202 size_t len = smb_len_tcp(inbuf);
2203 struct iovec *iov = NULL;
2204 int num_iov = 0;
2205 struct tevent_req **chain = NULL;
2206 size_t num_chained = 0;
2207 size_t num_responses = 0;
2208
2209 if (conn->smb1.read_braw_req != NULL) {
2210 req = conn->smb1.read_braw_req;
2211 conn->smb1.read_braw_req = NULL;
2212 state = tevent_req_data(req, struct smbXcli_req_state);
2213
2214 smbXcli_req_unset_pending(req);
2215
2216 if (state->smb1.recv_iov == NULL) {
2217 /*
2218 * For requests with more than
2219 * one response, we have to readd the
2220 * recv_iov array.
2221 */
2222 state->smb1.recv_iov = talloc_zero_array(state,
2223 struct iovec,
2224 3);
2225 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2226 return NT_STATUS_OK;
2227 }
2228 }
2229
2230 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
2231 state->smb1.recv_iov[0].iov_len = len;
2232 ZERO_STRUCT(state->smb1.recv_iov[1]);
2233 ZERO_STRUCT(state->smb1.recv_iov[2]);
2234
2235 state->smb1.recv_cmd = SMBreadBraw;
2236 state->smb1.recv_status = NT_STATUS_OK;
2237 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2238
2239 tevent_req_done(req);
2240 return NT_STATUS_OK;
2241 }
2242
2243 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
2244 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
2245 DEBUG(10, ("Got non-SMB PDU\n"));
2246 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2247 }
2248
2249 /*
2250 * If we supported multiple encryption contexts
2251 * here we'd look up based on tid.
2252 */
2253 if (common_encryption_on(conn->smb1.trans_enc)
2254 && (CVAL(inbuf, 0) == 0)) {
2255 uint16_t enc_ctx_num;
2256
2257 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
2258 if (!NT_STATUS_IS_OK(status)) {
2259 DEBUG(10, ("get_enc_ctx_num returned %s\n",
2260 nt_errstr(status)));
2261 return status;
2262 }
2263
2264 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
2265 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
2266 enc_ctx_num,
2267 conn->smb1.trans_enc->enc_ctx_num));
2268 return NT_STATUS_INVALID_HANDLE;
2269 }
2270
2271 status = common_decrypt_buffer(conn->smb1.trans_enc,
2272 (char *)inbuf);
2273 if (!NT_STATUS_IS_OK(status)) {
2274 DEBUG(10, ("common_decrypt_buffer returned %s\n",
2275 nt_errstr(status)));
2276 return status;
2277 }
2278 inhdr = inbuf + NBT_HDR_SIZE;
2279 len = smb_len_nbt(inbuf);
2280 }
2281
2282 mid = SVAL(inhdr, HDR_MID);
2283 num_pending = talloc_array_length(conn->pending);
2284
2285 for (i=0; i<num_pending; i++) {
2286 if (mid == smb1cli_req_mid(conn->pending[i])) {
2287 break;
2288 }
2289 }
2290 if (i == num_pending) {
2291 /* Dump unexpected reply */
2292 return NT_STATUS_RETRY;
2293 }
2294
2295 oplock_break = false;
2296
2297 if (mid == 0xffff) {
2298 /*
2299 * Paranoia checks that this is really an oplock break request.
2300 */
2301 oplock_break = (len == 51); /* hdr + 8 words */
2302 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
2303 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
2304 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
2305 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
2306
2307 if (!oplock_break) {
2308 /* Dump unexpected reply */
2309 return NT_STATUS_RETRY;
2310 }
2311 }
2312
2313 req = conn->pending[i];
2314 state = tevent_req_data(req, struct smbXcli_req_state);
2315
2316 if (!oplock_break /* oplock breaks are not signed */
2317 && !smb1_signing_check_pdu(conn->smb1.signing,
2318 inhdr, len, state->smb1.seqnum+1)) {
2319 DEBUG(10, ("cli_check_sign_mac failed\n"));
2320 return NT_STATUS_ACCESS_DENIED;
2321 }
2322
2323 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
2324 &iov, &num_iov);
2325 if (!NT_STATUS_IS_OK(status)) {
2326 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
2327 nt_errstr(status)));
2328 return status;
2329 }
2330
2331 cmd = CVAL(inhdr, HDR_COM);
2332 status = smb1cli_pull_raw_error(inhdr);
2333
2334 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
2335 (state->session != NULL) && state->session->disconnect_expired)
2336 {
2337 /*
2338 * this should be a short term hack
2339 * until the upper layers have implemented
2340 * re-authentication.
2341 */
2342 return status;
2343 }
2344
2345 if (state->smb1.chained_requests == NULL) {
2346 if (num_iov != 3) {
2347 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2348 }
2349
2350 smbXcli_req_unset_pending(req);
2351
2352 if (state->smb1.recv_iov == NULL) {
2353 /*
2354 * For requests with more than
2355 * one response, we have to readd the
2356 * recv_iov array.
2357 */
2358 state->smb1.recv_iov = talloc_zero_array(state,
2359 struct iovec,
2360 3);
2361 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2362 return NT_STATUS_OK;
2363 }
2364 }
2365
2366 state->smb1.recv_cmd = cmd;
2367 state->smb1.recv_status = status;
2368 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2369
2370 state->smb1.recv_iov[0] = iov[0];
2371 state->smb1.recv_iov[1] = iov[1];
2372 state->smb1.recv_iov[2] = iov[2];
2373
2374 if (talloc_array_length(conn->pending) == 0) {
2375 tevent_req_done(req);
2376 return NT_STATUS_OK;
2377 }
2378
2379 tevent_req_defer_callback(req, state->ev);
2380 tevent_req_done(req);
2381 return NT_STATUS_RETRY;
2382 }
2383
2384 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2385 num_chained = talloc_array_length(chain);
2386 num_responses = (num_iov - 1)/2;
2387
2388 if (num_responses > num_chained) {
2389 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2390 }
2391
2392 for (i=0; i<num_chained; i++) {
2393 size_t iov_idx = 1 + (i*2);
2394 struct iovec *cur = &iov[iov_idx];
2395 uint8_t *inbuf_ref;
2396
2397 req = chain[i];
2398 state = tevent_req_data(req, struct smbXcli_req_state);
2399
2400 smbXcli_req_unset_pending(req);
2401
2402 /*
2403 * as we finish multiple requests here
2404 * we need to defer the callbacks as
2405 * they could destroy our current stack state.
2406 */
2407 tevent_req_defer_callback(req, state->ev);
2408
2409 if (i >= num_responses) {
2410 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2411 continue;
2412 }
2413
2414 if (state->smb1.recv_iov == NULL) {
2415 /*
2416 * For requests with more than
2417 * one response, we have to readd the
2418 * recv_iov array.
2419 */
2420 state->smb1.recv_iov = talloc_zero_array(state,
2421 struct iovec,
2422 3);
2423 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2424 continue;
2425 }
2426 }
2427
2428 state->smb1.recv_cmd = cmd;
2429
2430 if (i == (num_responses - 1)) {
2431 /*
2432 * The last request in the chain gets the status
2433 */
2434 state->smb1.recv_status = status;
2435 } else {
2436 cmd = CVAL(cur[0].iov_base, 0);
2437 state->smb1.recv_status = NT_STATUS_OK;
2438 }
2439
2440 state->inbuf = inbuf;
2441
2442 /*
2443 * Note: here we use talloc_reference() in a way
2444 * that does not expose it to the caller.
2445 */
2446 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2447 if (tevent_req_nomem(inbuf_ref, req)) {
2448 continue;
2449 }
2450
2451 /* copy the related buffers */
2452 state->smb1.recv_iov[0] = iov[0];
2453 state->smb1.recv_iov[1] = cur[0];
2454 state->smb1.recv_iov[2] = cur[1];
2455
2456 tevent_req_done(req);
2457 }
2458
2459 return NT_STATUS_RETRY;
2460 }
2461
2462 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2463 TALLOC_CTX *mem_ctx,
2464 struct iovec **piov,
2465 uint8_t **phdr,
2466 uint8_t *pwct,
2467 uint16_t **pvwv,
2468 uint32_t *pvwv_offset,
2469 uint32_t *pnum_bytes,
2470 uint8_t **pbytes,
2471 uint32_t *pbytes_offset,
2472 uint8_t **pinbuf,
2473 const struct smb1cli_req_expected_response *expected,
2474 size_t num_expected)
2475 {
2476 struct smbXcli_req_state *state =
2477 tevent_req_data(req,
2478 struct smbXcli_req_state);
2479 NTSTATUS status = NT_STATUS_OK;
2480 struct iovec *recv_iov = NULL;
2481 uint8_t *hdr = NULL;
2482 uint8_t wct = 0;
2483 uint32_t vwv_offset = 0;
2484 uint16_t *vwv = NULL;
2485 uint32_t num_bytes = 0;
2486 uint32_t bytes_offset = 0;
2487 uint8_t *bytes = NULL;
2488 size_t i;
2489 bool found_status = false;
2490 bool found_size = false;
2491
2492 if (piov != NULL) {
2493 *piov = NULL;
2494 }
2495 if (phdr != NULL) {
2496 *phdr = 0;
2497 }
2498 if (pwct != NULL) {
2499 *pwct = 0;
2500 }
2501 if (pvwv != NULL) {
2502 *pvwv = NULL;
2503 }
2504 if (pvwv_offset != NULL) {
2505 *pvwv_offset = 0;
2506 }
2507 if (pnum_bytes != NULL) {
2508 *pnum_bytes = 0;
2509 }
2510 if (pbytes != NULL) {
2511 *pbytes = NULL;
2512 }
2513 if (pbytes_offset != NULL) {
2514 *pbytes_offset = 0;
2515 }
2516 if (pinbuf != NULL) {
2517 *pinbuf = NULL;
2518 }
2519
2520 if (state->inbuf != NULL) {
2521 recv_iov = state->smb1.recv_iov;
2522 state->smb1.recv_iov = NULL;
2523 if (state->smb1.recv_cmd != SMBreadBraw) {
2524 hdr = (uint8_t *)recv_iov[0].iov_base;
2525 wct = recv_iov[1].iov_len/2;
2526 vwv = (uint16_t *)recv_iov[1].iov_base;
2527 vwv_offset = PTR_DIFF(vwv, hdr);
2528 num_bytes = recv_iov[2].iov_len;
2529 bytes = (uint8_t *)recv_iov[2].iov_base;
2530 bytes_offset = PTR_DIFF(bytes, hdr);
2531 }
2532 }
2533
2534 if (tevent_req_is_nterror(req, &status)) {
2535 for (i=0; i < num_expected; i++) {
2536 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2537 found_status = true;
2538 break;
2539 }
2540 }
2541
2542 if (found_status) {
2543 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2544 }
2545
2546 return status;
2547 }
2548
2549 if (num_expected == 0) {
2550 found_status = true;
2551 found_size = true;
2552 }
2553
2554 status = state->smb1.recv_status;
2555
2556 for (i=0; i < num_expected; i++) {
2557 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2558 continue;
2559 }
2560
2561 found_status = true;
2562 if (expected[i].wct == 0) {
2563 found_size = true;
2564 break;
2565 }
2566
2567 if (expected[i].wct == wct) {
2568 found_size = true;
2569 break;
2570 }
2571 }
2572
2573 if (!found_status) {
2574 return status;
2575 }
2576
2577 if (!found_size) {
2578 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2579 }
2580
2581 if (piov != NULL) {
2582 *piov = talloc_move(mem_ctx, &recv_iov);
2583 }
2584
2585 if (phdr != NULL) {
2586 *phdr = hdr;
2587 }
2588 if (pwct != NULL) {
2589 *pwct = wct;
2590 }
2591 if (pvwv != NULL) {
2592 *pvwv = vwv;
2593 }
2594 if (pvwv_offset != NULL) {
2595 *pvwv_offset = vwv_offset;
2596 }
2597 if (pnum_bytes != NULL) {
2598 *pnum_bytes = num_bytes;
2599 }
2600 if (pbytes != NULL) {
2601 *pbytes = bytes;
2602 }
2603 if (pbytes_offset != NULL) {
2604 *pbytes_offset = bytes_offset;
2605 }
2606 if (pinbuf != NULL) {
2607 *pinbuf = state->inbuf;
2608 }
2609
2610 return status;
2611 }
2612
2613 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2614 {
2615 size_t wct_ofs;
2616 int i;
2617
2618 wct_ofs = HDR_WCT;
2619
2620 for (i=0; i<num_reqs; i++) {
2621 struct smbXcli_req_state *state;
2622 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2623 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2624 state->smb1.iov_count-2);
2625 wct_ofs = (wct_ofs + 3) & ~3;
2626 }
2627 return wct_ofs;
2628 }
2629
2630 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2631 {
2632 struct smbXcli_req_state *first_state =
2633 tevent_req_data(reqs[0],
2634 struct smbXcli_req_state);
2635 struct smbXcli_req_state *state;
2636 size_t wct_offset;
2637 size_t chain_padding = 0;
2638 int i, iovlen;
2639 struct iovec *iov = NULL;
2640 struct iovec *this_iov;
2641 NTSTATUS status;
2642 ssize_t nbt_len;
2643
2644 if (num_reqs == 1) {
2645 return smb1cli_req_writev_submit(reqs[0], first_state,
2646 first_state->smb1.iov,
2647 first_state->smb1.iov_count);
2648 }
2649
2650 iovlen = 0;
2651 for (i=0; i<num_reqs; i++) {
2652 if (!tevent_req_is_in_progress(reqs[i])) {
2653 return NT_STATUS_INTERNAL_ERROR;
2654 }
2655
2656 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2657
2658 if (state->smb1.iov_count < 4) {
2659 return NT_STATUS_INVALID_PARAMETER_MIX;
2660 }
2661
2662 if (i == 0) {
2663 /*
2664 * The NBT and SMB header
2665 */
2666 iovlen += 2;
2667 } else {
2668 /*
2669 * Chain padding
2670 */
2671 iovlen += 1;
2672 }
2673
2674 /*
2675 * words and bytes
2676 */
2677 iovlen += state->smb1.iov_count - 2;
2678 }
2679
2680 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2681 if (iov == NULL) {
2682 return NT_STATUS_NO_MEMORY;
2683 }
2684
2685 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2686 first_state, reqs, sizeof(*reqs) * num_reqs);
2687 if (first_state->smb1.chained_requests == NULL) {
2688 TALLOC_FREE(iov);
2689 return NT_STATUS_NO_MEMORY;
2690 }
2691
2692 wct_offset = HDR_WCT;
2693 this_iov = iov;
2694
2695 for (i=0; i<num_reqs; i++) {
2696 size_t next_padding = 0;
2697 uint16_t *vwv;
2698
2699 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2700
2701 if (i < num_reqs-1) {
2702 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2703 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2704 TALLOC_FREE(iov);
2705 TALLOC_FREE(first_state->smb1.chained_requests);
2706 return NT_STATUS_INVALID_PARAMETER_MIX;
2707 }
2708 }
2709
2710 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2711 state->smb1.iov_count-2) + 1;
2712 if ((wct_offset % 4) != 0) {
2713 next_padding = 4 - (wct_offset % 4);
2714 }
2715 wct_offset += next_padding;
2716 vwv = state->smb1.vwv;
2717
2718 if (i < num_reqs-1) {
2719 struct smbXcli_req_state *next_state =
2720 tevent_req_data(reqs[i+1],
2721 struct smbXcli_req_state);
2722 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2723 SCVAL(vwv+0, 1, 0);
2724 SSVAL(vwv+1, 0, wct_offset);
2725 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2726 /* properly end the chain */
2727 SCVAL(vwv+0, 0, 0xff);
2728 SCVAL(vwv+0, 1, 0xff);
2729 SSVAL(vwv+1, 0, 0);
2730 }
2731
2732 if (i == 0) {
2733 /*
2734 * The NBT and SMB header
2735 */
2736 this_iov[0] = state->smb1.iov[0];
2737 this_iov[1] = state->smb1.iov[1];
2738 this_iov += 2;
2739 } else {
2740 /*
2741 * This one is a bit subtle. We have to add
2742 * chain_padding bytes between the requests, and we
2743 * have to also include the wct field of the
2744 * subsequent requests. We use the subsequent header
2745 * for the padding, it contains the wct field in its
2746 * last byte.
2747 */
2748 this_iov[0].iov_len = chain_padding+1;
2749 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2750 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2751 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2752 this_iov += 1;
2753 }
2754
2755 /*
2756 * copy the words and bytes
2757 */
2758 memcpy(this_iov, state->smb1.iov+2,
2759 sizeof(struct iovec) * (state->smb1.iov_count-2));
2760 this_iov += state->smb1.iov_count - 2;
2761 chain_padding = next_padding;
2762 }
2763
2764 nbt_len = iov_buflen(&iov[1], iovlen-1);
2765 if ((nbt_len == -1) || (nbt_len > first_state->conn->smb1.max_xmit)) {
2766 TALLOC_FREE(iov);
2767 TALLOC_FREE(first_state->smb1.chained_requests);
2768 return NT_STATUS_INVALID_PARAMETER_MIX;
2769 }
2770
2771 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2772 if (!NT_STATUS_IS_OK(status)) {
2773 TALLOC_FREE(iov);
2774 TALLOC_FREE(first_state->smb1.chained_requests);
2775 return status;
2776 }
2777
2778 return NT_STATUS_OK;
2779 }
2780
2781 struct tevent_queue *smbXcli_conn_send_queue(struct smbXcli_conn *conn)
2782 {
2783 return conn->outgoing;
2784 }
2785
2786 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2787 {
2788 return ((tevent_queue_length(conn->outgoing) != 0)
2789 || (talloc_array_length(conn->pending) != 0));
2790 }
2791
2792 bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn)
2793 {
2794 if (conn->protocol >= PROTOCOL_SMB2_02) {
2795 return (smb2cli_conn_server_capabilities(conn) & SMB2_CAP_DFS);
2796 }
2797
2798 return (smb1cli_conn_capabilities(conn) & CAP_DFS);
2799 }
2800
2801 bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
2802 {
2803 uint16_t credits = 1;
2804
2805 if (conn->smb2.cur_credits == 0) {
2806 if (max_dyn_len != NULL) {
2807 *max_dyn_len = 0;
2808 }
2809 return false;
2810 }
2811
2812 if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2813 credits = conn->smb2.cur_credits;
2814 }
2815
2816 if (max_dyn_len != NULL) {
2817 *max_dyn_len = credits * 65536;
2818 }
2819
2820 return true;
2821 }
2822
2823 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2824 {
2825 return conn->smb2.server.capabilities;
2826 }
2827
2828 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2829 {
2830 return conn->smb2.server.security_mode;
2831 }
2832
2833 uint16_t smb2cli_conn_server_signing_algo(struct smbXcli_conn *conn)
2834 {
2835 return conn->smb2.server.sign_algo;
2836 }
2837
2838 uint16_t smb2cli_conn_server_encryption_algo(struct smbXcli_conn *conn)
2839 {
2840 return conn->smb2.server.cipher;
2841 }
2842
2843 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2844 {
2845 return conn->smb2.server.max_trans_size;
2846 }
2847
2848 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2849 {
2850 return conn->smb2.server.max_read_size;
2851 }
2852
2853 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2854 {
2855 return conn->smb2.server.max_write_size;
2856 }
2857
2858 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2859 uint16_t max_credits)
2860 {
2861 conn->smb2.max_credits = max_credits;
2862 }
2863
2864 uint16_t smb2cli_conn_get_cur_credits(struct smbXcli_conn *conn)
2865 {
2866 return conn->smb2.cur_credits;
2867 }
2868
2869 uint8_t smb2cli_conn_get_io_priority(struct smbXcli_conn *conn)
2870 {
2871 if (conn->protocol < PROTOCOL_SMB3_11) {
2872 return 0;
2873 }
2874
2875 return conn->smb2.io_priority;
2876 }
2877
2878 void smb2cli_conn_set_io_priority(struct smbXcli_conn *conn,
2879 uint8_t io_priority)
2880 {
2881 conn->smb2.io_priority = io_priority;
2882 }
2883
2884 uint32_t smb2cli_conn_cc_chunk_len(struct smbXcli_conn *conn)
2885 {
2886 return conn->smb2.cc_chunk_len;
2887 }
2888
2889 void smb2cli_conn_set_cc_chunk_len(struct smbXcli_conn *conn,
2890 uint32_t chunk_len)
2891 {
2892 conn->smb2.cc_chunk_len = chunk_len;
2893 }
2894
2895 uint32_t smb2cli_conn_cc_max_chunks(struct smbXcli_conn *conn)
2896 {
2897 return conn->smb2.cc_max_chunks;
2898 }
2899
2900 void smb2cli_conn_set_cc_max_chunks(struct smbXcli_conn *conn,
2901 uint32_t max_chunks)
2902 {
2903 conn->smb2.cc_max_chunks = max_chunks;
2904 }
2905
2906 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2907
2908 static bool smb2cli_req_cancel(struct tevent_req *req)
2909 {
2910 struct smbXcli_req_state *state =
2911 tevent_req_data(req,
2912 struct smbXcli_req_state);
2913 struct smbXcli_tcon *tcon = state->tcon;
2914 struct smbXcli_session *session = state->session;
2915 uint8_t *fixed = state->smb2.pad;
2916 uint16_t fixed_len = 4;
2917 struct tevent_req *subreq;
2918 struct smbXcli_req_state *substate;
2919 NTSTATUS status;
2920
2921 if (state->smb2.cancel_mid == UINT64_MAX) {
2922 /*
2923 * We already send a cancel,
2924 * make sure we don't do it
2925 * twice, otherwise we may
2926 * expose the same NONCE for
2927 * AES-128-GMAC signing
2928 */
2929 return true;
2930 }
2931
2932 SSVAL(fixed, 0, 0x04);
2933 SSVAL(fixed, 2, 0);
2934
2935 subreq = smb2cli_req_create(state, state->ev,
2936 state->conn,
2937 SMB2_OP_CANCEL,
2938 0, 0, /* flags */
2939 0, /* timeout */
2940 tcon, session,
2941 fixed, fixed_len,
2942 NULL, 0, 0);
2943 if (subreq == NULL) {
2944 return false;
2945 }
2946 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2947
2948 substate->smb2.cancel_mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2949
2950 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, state->smb2.cancel_flags);
2951 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, state->smb2.cancel_mid);
2952 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, state->smb2.cancel_aid);
2953
2954 /*
2955 * remember that we don't send a cancel again
2956 */
2957 state->smb2.cancel_mid = UINT64_MAX;
2958
2959 status = smb2cli_req_compound_submit(&subreq, 1);
2960 if (!NT_STATUS_IS_OK(status)) {
2961 TALLOC_FREE(subreq);
2962 return false;
2963 }
2964
2965 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2966
2967 return true;
2968 }
2969
2970 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2971 {
2972 /* we do not care about the result */
2973 TALLOC_FREE(subreq);
2974 }
2975
2976 struct timeval smbXcli_req_endtime(struct tevent_req *req)
2977 {
2978 struct smbXcli_req_state *state = tevent_req_data(
2979 req, struct smbXcli_req_state);
2980
2981 return state->endtime;
2982 }
2983
2984 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2985 struct tevent_context *ev,
2986 struct smbXcli_conn *conn,
2987 uint16_t cmd,
2988 uint32_t additional_flags,
2989 uint32_t clear_flags,
2990 uint32_t timeout_msec,
2991 struct smbXcli_tcon *tcon,
2992 struct smbXcli_session *session,
2993 const uint8_t *fixed,
2994 uint16_t fixed_len,
2995 const uint8_t *dyn,
2996 uint32_t dyn_len,
2997 uint32_t max_dyn_len)
2998 {
2999 struct tevent_req *req;
3000 struct smbXcli_req_state *state;
3001 uint32_t flags = 0;
3002 uint32_t tid = 0;
3003 uint64_t uid = 0;
3004 bool use_channel_sequence = conn->smb2.force_channel_sequence;
3005 uint16_t channel_sequence = 0;
3006 bool use_replay_flag = false;
3007 enum protocol_types proto = smbXcli_conn_protocol(conn);
3008
3009 req = tevent_req_create(mem_ctx, &state,
3010 struct smbXcli_req_state);
3011 if (req == NULL) {
3012 return NULL;
3013 }
3014
3015 if ((proto > PROTOCOL_NONE) && (proto < PROTOCOL_SMB2_02)) {
3016 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
3017 return req;
3018 }
3019
3020 state->ev = ev;
3021 state->conn = conn;
3022 state->session = session;
3023 state->tcon = tcon;
3024
3025 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
3026 use_channel_sequence = true;
3027 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
3028 use_channel_sequence = true;
3029 }
3030
3031 if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_00) {
3032 use_replay_flag = true;
3033 }
3034
3035 if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_11) {
3036 flags |= SMB2_PRIORITY_VALUE_TO_MASK(conn->smb2.io_priority);
3037 }
3038
3039 if (session) {
3040 uid = session->smb2->session_id;
3041
3042 if (use_channel_sequence) {
3043 channel_sequence = session->smb2->channel_sequence;
3044 }
3045
3046 if (use_replay_flag && session->smb2->replay_active) {
3047 additional_flags |= SMB2_HDR_FLAG_REPLAY_OPERATION;
3048 }
3049
3050 state->smb2.should_sign = session->smb2->should_sign;
3051 state->smb2.should_encrypt = session->smb2->should_encrypt;
3052 state->smb2.require_signed_response =
3053 session->smb2->require_signed_response;
3054
3055 if (cmd == SMB2_OP_SESSSETUP &&
3056 !smb2_signing_key_valid(session->smb2_channel.signing_key) &&
3057 smb2_signing_key_valid(session->smb2->signing_key))
3058 {
3059 /*
3060 * a session bind needs to be signed
3061 */
3062 state->smb2.should_sign = true;
3063 }
3064
3065 if (cmd == SMB2_OP_SESSSETUP &&
3066 !smb2_signing_key_valid(session->smb2_channel.signing_key)) {
3067 state->smb2.should_encrypt = false;
3068 }
3069
3070 if (additional_flags & SMB2_HDR_FLAG_SIGNED) {
3071 if (!smb2_signing_key_valid(session->smb2_channel.signing_key)) {
3072 tevent_req_nterror(req, NT_STATUS_NO_USER_SESSION_KEY);
3073 return req;
3074 }
3075
3076 additional_flags &= ~SMB2_HDR_FLAG_SIGNED;
3077 state->smb2.should_sign = true;
3078 }
3079 }
3080
3081 if (tcon) {
3082 tid = tcon->smb2.tcon_id;
3083
3084 if (tcon->smb2.should_sign) {
3085 state->smb2.should_sign = true;
3086 }
3087 if (tcon->smb2.should_encrypt) {
3088 state->smb2.should_encrypt = true;
3089 }
3090 }
3091
3092 if (state->smb2.should_encrypt) {
3093 state->smb2.should_sign = false;
3094 }
3095
3096 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
3097 if (tevent_req_nomem(state->smb2.recv_iov, req)) {
3098 return req;
3099 }
3100
3101 flags |= additional_flags;
3102 flags &= ~clear_flags;
3103
3104 state->smb2.fixed = fixed;
3105 state->smb2.fixed_len = fixed_len;
3106 state->smb2.dyn = dyn;
3107 state->smb2.dyn_len = dyn_len;
3108 state->smb2.max_dyn_len = max_dyn_len;
3109
3110 if (state->smb2.should_encrypt) {
3111 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
3112 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
3113 }
3114
3115 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
3116 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
3117 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
3118 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
3119 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
3120 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
3121 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
3122 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
3123
3124 switch (cmd) {
3125 case SMB2_OP_CANCEL:
3126 state->one_way = true;
3127 break;
3128 case SMB2_OP_BREAK:
3129 /*
3130 * If this is a dummy request, it will have
3131 * UINT64_MAX as message id.
3132 * If we send on break acknowledgement,
3133 * this gets overwritten later.
3134 */
3135 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
3136 break;
3137 }
3138
3139 if (timeout_msec > 0) {
3140 state->endtime = timeval_current_ofs_msec(timeout_msec);
3141 if (!tevent_req_set_endtime(req, ev, state->endtime)) {
3142 return req;
3143 }
3144 }
3145
3146 return req;
3147 }
3148
3149 void smb2cli_req_set_notify_async(struct tevent_req *req)
3150 {
3151 struct smbXcli_req_state *state =
3152 tevent_req_data(req,
3153 struct smbXcli_req_state);
3154
3155 state->smb2.notify_async = true;
3156 }
3157
3158 static void smb2cli_req_writev_done(struct tevent_req *subreq);
3159 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3160 TALLOC_CTX *tmp_mem,
3161 uint8_t *inbuf);
3162
3163 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
3164 int num_reqs)
3165 {
3166 struct smbXcli_req_state *state;
3167 struct tevent_req *subreq;
3168 struct iovec *iov;
3169 int i, num_iov, nbt_len;
3170 int tf_iov = -1;
3171 struct smb2_signing_key *encryption_key = NULL;
3172 uint64_t encryption_session_id = 0;
3173 uint64_t nonce_high = UINT64_MAX;
3174 uint64_t nonce_low = UINT64_MAX;
3175
3176 /*
3177 * 1 for the nbt length, optional TRANSFORM
3178 * per request: HDR, fixed, dyn, padding
3179 * -1 because the last one does not need padding
3180 */
3181
3182 iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
3183 if (iov == NULL) {
3184 return NT_STATUS_NO_MEMORY;
3185 }
3186
3187 num_iov = 1;
3188 nbt_len = 0;
3189
3190 /*
3191 * the session of the first request that requires encryption
3192 * specifies the encryption key.
3193 */
3194 for (i=0; i<num_reqs; i++) {
3195 if (!tevent_req_is_in_progress(reqs[i])) {
3196 return NT_STATUS_INTERNAL_ERROR;
3197 }
3198
3199 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
3200
3201 if (!smbXcli_conn_is_connected(state->conn)) {
3202 return NT_STATUS_CONNECTION_DISCONNECTED;
3203 }
3204
3205 if ((state->conn->protocol != PROTOCOL_NONE) &&
3206 (state->conn->protocol < PROTOCOL_SMB2_02)) {
3207 return NT_STATUS_REVISION_MISMATCH;
3208 }
3209
3210 if (state->session == NULL) {
3211 continue;
3212 }
3213
3214 if (!state->smb2.should_encrypt) {
3215 continue;
3216 }
3217
3218 encryption_key = state->session->smb2->encryption_key;
3219 if (!smb2_signing_key_valid(encryption_key)) {
3220 return NT_STATUS_INVALID_PARAMETER_MIX;
3221 }
3222
3223 encryption_session_id = state->session->smb2->session_id;
3224
3225 state->session->smb2->nonce_low += 1;
3226 if (state->session->smb2->nonce_low == 0) {
3227 state->session->smb2->nonce_high += 1;
3228 state->session->smb2->nonce_low += 1;
3229 }
3230
3231 /*
3232 * CCM and GCM algorithms must never have their
3233 * nonce wrap, or the security of the whole
3234 * communication and the keys is destroyed.
3235 * We must drop the connection once we have
3236 * transferred too much data.
3237 *
3238 * NOTE: We assume nonces greater than 8 bytes.
3239 */
3240 if (state->session->smb2->nonce_high >=
3241 state->session->smb2->nonce_high_max)
3242 {
3243 return NT_STATUS_ENCRYPTION_FAILED;
3244 }
3245
3246 nonce_high = state->session->smb2->nonce_high_random;
3247 nonce_high += state->session->smb2->nonce_high;
3248 nonce_low = state->session->smb2->nonce_low;
3249
3250 tf_iov = num_iov;
3251 iov[num_iov].iov_base = state->smb2.transform;
3252 iov[num_iov].iov_len = sizeof(state->smb2.transform);
3253 num_iov += 1;
3254
3255 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
3256 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
3257 nonce_low);
3258 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
3259 nonce_high);
3260 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
3261 encryption_session_id);
3262
3263 nbt_len += SMB2_TF_HDR_SIZE;
3264 break;
3265 }
3266
3267 for (i=0; i<num_reqs; i++) {
3268 int hdr_iov;
3269 size_t reqlen;
3270 bool ret;
3271 uint16_t opcode;
3272 uint64_t avail;
3273 uint16_t charge;
3274 uint16_t credits;
3275 uint64_t mid;
3276 struct smb2_signing_key *signing_key = NULL;
3277
3278 if (!tevent_req_is_in_progress(reqs[i])) {
3279 return NT_STATUS_INTERNAL_ERROR;
3280 }
3281
3282 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
3283
3284 if (!smbXcli_conn_is_connected(state->conn)) {
3285 return NT_STATUS_CONNECTION_DISCONNECTED;
3286 }
3287
3288 if ((state->conn->protocol != PROTOCOL_NONE) &&
3289 (state->conn->protocol < PROTOCOL_SMB2_02)) {
3290 return NT_STATUS_REVISION_MISMATCH;
3291 }
3292
3293 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3294 if (opcode == SMB2_OP_CANCEL) {
3295 goto skip_credits;
3296 }
3297
3298 avail = UINT64_MAX - state->conn->smb2.mid;
3299 if (avail < 1) {
3300 return NT_STATUS_CONNECTION_ABORTED;
3301 }
3302
3303 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
3304 uint32_t max_dyn_len = 1;
3305
3306 max_dyn_len = MAX(max_dyn_len, state->smb2.dyn_len);
3307 max_dyn_len = MAX(max_dyn_len, state->smb2.max_dyn_len);
3308
3309 charge = (max_dyn_len - 1)/ 65536 + 1;
3310 } else {
3311 charge = 1;
3312 }
3313
3314 charge = MAX(state->smb2.credit_charge, charge);
3315
3316 avail = MIN(avail, state->conn->smb2.cur_credits);
3317 if (avail < charge) {
3318 DBG_ERR("Insufficient credits. "
3319 "%"PRIu64" available, %"PRIu16" needed\n",
3320 avail, charge);
3321 return NT_STATUS_INTERNAL_ERROR;
3322 }
3323
3324 credits = 0;
3325 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
3326 credits = state->conn->smb2.max_credits -
3327 state->conn->smb2.cur_credits;
3328 }
3329 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
3330 credits += 1;
3331 }
3332
3333 mid = state->conn->smb2.mid;
3334 state->conn->smb2.mid += charge;
3335 state->conn->smb2.cur_credits -= charge;
3336
3337 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
3338 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
3339 }
3340 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
3341 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
3342
3343 state->smb2.cancel_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3344 state->smb2.cancel_flags &= ~SMB2_HDR_FLAG_CHAINED;
3345 if (state->conn->smb2.server.sign_algo >= SMB2_SIGNING_AES128_GMAC) {
3346 state->smb2.cancel_mid = mid;
3347 } else {
3348 state->smb2.cancel_mid = 0;
3349 }
3350 state->smb2.cancel_aid = 0;
3351
3352 skip_credits:
3353 if (state->session && encryption_key == NULL) {
3354 /*
3355 * We prefer the channel signing key if it is
3356 * already there.
3357 */
3358 if (state->smb2.should_sign) {
3359 signing_key = state->session->smb2_channel.signing_key;
3360 }
3361
3362 /*
3363 * If it is a channel binding, we already have the main
3364 * signing key and try that one.
3365 */
3366 if (signing_key != NULL &&
3367 !smb2_signing_key_valid(signing_key)) {
3368 signing_key = state->session->smb2->signing_key;
3369 }
3370
3371 /*
3372 * If we do not have any session key yet, we skip the
3373 * signing of SMB2_OP_SESSSETUP requests.
3374 */
3375 if (signing_key != NULL &&
3376 !smb2_signing_key_valid(signing_key)) {
3377 signing_key = NULL;
3378 }
3379 }
3380
3381 hdr_iov = num_iov;
3382 iov[num_iov].iov_base = state->smb2.hdr;
3383 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
3384 num_iov += 1;
3385
3386 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
3387 iov[num_iov].iov_len = state->smb2.fixed_len;
3388 num_iov += 1;
3389
3390 if (state->smb2.dyn != NULL) {
3391 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
3392 iov[num_iov].iov_len = state->smb2.dyn_len;
3393 num_iov += 1;
3394 }
3395
3396 reqlen = sizeof(state->smb2.hdr);
3397 reqlen += state->smb2.fixed_len;
3398 reqlen += state->smb2.dyn_len;
3399
3400 if (i < num_reqs-1) {
3401 if ((reqlen % 8) > 0) {
3402 uint8_t pad = 8 - (reqlen % 8);
3403 iov[num_iov].iov_base = state->smb2.pad;
3404 iov[num_iov].iov_len = pad;
3405 num_iov += 1;
3406 reqlen += pad;
3407 }
3408 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
3409 }
3410
3411 state->smb2.encryption_session_id = encryption_session_id;
3412
3413 if (signing_key != NULL) {
3414 NTSTATUS status;
3415
3416 status = smb2_signing_sign_pdu(signing_key,
3417 &iov[hdr_iov], num_iov - hdr_iov);
3418 if (!NT_STATUS_IS_OK(status)) {
3419 return status;
3420 }
3421 }
3422
3423 nbt_len += reqlen;
3424
3425 ret = smbXcli_req_set_pending(reqs[i]);
3426 if (!ret) {
3427 return NT_STATUS_NO_MEMORY;
3428 }
3429 }
3430
3431 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
3432 _smb_setlen_tcp(state->length_hdr, nbt_len);
3433 iov[0].iov_base = state->length_hdr;
3434 iov[0].iov_len = sizeof(state->length_hdr);
3435
3436 if (encryption_key != NULL) {
3437 NTSTATUS status;
3438 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
3439 uint8_t *buf;
3440 int vi;
3441
3442 buf = talloc_array(iov, uint8_t, buflen);
3443 if (buf == NULL) {
3444 return NT_STATUS_NO_MEMORY;
3445 }
3446
3447 /*
3448 * We copy the buffers before encrypting them,
3449 * this is at least currently needed for the
3450 * to keep state->smb2.hdr.
3451 *
3452 * Also the callers may expect there buffers
3453 * to be const.
3454 */
3455 for (vi = tf_iov + 1; vi < num_iov; vi++) {
3456 struct iovec *v = &iov[vi];
3457 const uint8_t *o = (const uint8_t *)v->iov_base;
3458
3459 memcpy(buf, o, v->iov_len);
3460 v->iov_base = (void *)buf;
3461 buf += v->iov_len;
3462 }
3463
3464 status = smb2_signing_encrypt_pdu(encryption_key,
3465 &iov[tf_iov], num_iov - tf_iov);
3466 if (!NT_STATUS_IS_OK(status)) {
3467 return status;
3468 }
3469 }
3470
3471 if (state->conn->dispatch_incoming == NULL) {
3472 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3473 }
3474
3475 subreq = writev_send(state, state->ev, state->conn->outgoing,
3476 state->conn->sock_fd, false, iov, num_iov);
3477 if (subreq == NULL) {
3478 return NT_STATUS_NO_MEMORY;
3479 }
3480 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
3481 state->write_req = subreq;
3482
3483 return NT_STATUS_OK;
3484 }
3485
3486 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
3487 {
3488 struct smbXcli_req_state *state =
3489 tevent_req_data(req,
3490 struct smbXcli_req_state);
3491
3492 state->smb2.credit_charge = charge;
3493 }
3494
3495 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
3496 struct tevent_context *ev,
3497 struct smbXcli_conn *conn,
3498 uint16_t cmd,
3499 uint32_t additional_flags,
3500 uint32_t clear_flags,
3501 uint32_t timeout_msec,
3502 struct smbXcli_tcon *tcon,
3503 struct smbXcli_session *session,
3504 const uint8_t *fixed,
3505 uint16_t fixed_len,
3506 const uint8_t *dyn,
3507 uint32_t dyn_len,
3508 uint32_t max_dyn_len)
3509 {
3510 struct tevent_req *req;
3511 NTSTATUS status;
3512
3513 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
3514 additional_flags, clear_flags,
3515 timeout_msec,
3516 tcon, session,
3517 fixed, fixed_len,
3518 dyn, dyn_len,
3519 max_dyn_len);
3520 if (req == NULL) {
3521 return NULL;
3522 }
3523 if (!tevent_req_is_in_progress(req)) {
3524 return tevent_req_post(req, ev);
3525 }
3526 status = smb2cli_req_compound_submit(&req, 1);
3527 if (tevent_req_nterror(req, status)) {
3528 return tevent_req_post(req, ev);
3529 }
3530 return req;
3531 }
3532
3533 static void smb2cli_req_writev_done(struct tevent_req *subreq)
3534 {
3535 struct tevent_req *req =
3536 tevent_req_callback_data(subreq,
3537 struct tevent_req);
3538 struct smbXcli_req_state *state =
3539 tevent_req_data(req,
3540 struct smbXcli_req_state);
3541 ssize_t nwritten;
3542 int err;
3543
3544 state->write_req = NULL;
3545
3546 nwritten = writev_recv(subreq, &err);
3547 TALLOC_FREE(subreq);
3548 if (nwritten == -1) {
3549 /* here, we need to notify all pending requests */
3550 NTSTATUS status = map_nt_error_from_unix_common(err);
3551 smbXcli_conn_disconnect(state->conn, status);
3552 return;
3553 }
3554 }
3555
3556 static struct smbXcli_session* smbXcli_session_by_uid(struct smbXcli_conn *conn,
3557 uint64_t uid)
3558 {
3559 struct smbXcli_session *s = conn->sessions;
3560
3561 for (; s; s = s->next) {
3562 if (s->smb2->session_id != uid) {
3563 continue;
3564 }
3565 break;
3566 }
3567
3568 return s;
3569 }
3570
3571 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3572 uint8_t *buf,
3573 size_t buflen,
3574 TALLOC_CTX *mem_ctx,
3575 struct iovec **piov,
3576 size_t *pnum_iov)
3577 {
3578 struct iovec *iov;
3579 int num_iov = 0;
3580 size_t taken = 0;
3581 uint8_t *first_hdr = buf;
3582 size_t verified_buflen = 0;
3583 uint8_t *tf = NULL;
3584 size_t tf_len = 0;
3585
3586 iov = talloc_array(mem_ctx, struct iovec, num_iov);
3587 if (iov == NULL) {
3588 return NT_STATUS_NO_MEMORY;
3589 }
3590
3591 while (taken < buflen) {
3592 size_t len = buflen - taken;
3593 uint8_t *hdr = first_hdr + taken;
3594 struct iovec *cur;
3595 size_t full_size;
3596 size_t next_command_ofs;
3597 uint16_t body_size;
3598 struct iovec *iov_tmp;
3599
3600 if (verified_buflen > taken) {
3601 len = verified_buflen - taken;
3602 } else {
3603 tf = NULL;
3604 tf_len = 0;
3605 }
3606
3607 if (len < 4) {
3608 DEBUG(10, ("%d bytes left, expected at least %d\n",
3609 (int)len, 4));
3610 goto inval;
3611 }
3612 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3613 struct smbXcli_session *s;
3614 uint64_t uid;
3615 struct iovec tf_iov[2];
3616 size_t enc_len;
3617 NTSTATUS status;
3618
3619 if (len < SMB2_TF_HDR_SIZE) {
3620 DEBUG(10, ("%d bytes left, expected at least %d\n",
3621 (int)len, SMB2_TF_HDR_SIZE));
3622 goto inval;
3623 }
3624 tf = hdr;
3625 tf_len = SMB2_TF_HDR_SIZE;
3626 taken += tf_len;
3627
3628 hdr = first_hdr + taken;
3629 enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3630 uid = BVAL(tf, SMB2_TF_SESSION_ID);
3631
3632 if (len < SMB2_TF_HDR_SIZE + enc_len) {
3633 DEBUG(10, ("%d bytes left, expected at least %d\n",
3634 (int)len,
3635 (int)(SMB2_TF_HDR_SIZE + enc_len)));
3636 goto inval;
3637 }
3638
3639 s = smbXcli_session_by_uid(conn, uid);
3640 if (s == NULL) {
3641 DEBUG(10, ("unknown session_id %llu\n",
3642 (unsigned long long)uid));
3643 goto inval;
3644 }
3645
3646 tf_iov[0].iov_base = (void *)tf;
3647 tf_iov[0].iov_len = tf_len;
3648 tf_iov[1].iov_base = (void *)hdr;
3649 tf_iov[1].iov_len = enc_len;
3650
3651 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3652 tf_iov, 2);
3653 if (!NT_STATUS_IS_OK(status)) {
3654 TALLOC_FREE(iov);
3655 return status;
3656 }
3657
3658 verified_buflen = taken + enc_len;
3659 len = enc_len;
3660 }
3661
3662 /*
3663 * We need the header plus the body length field
3664 */
3665
3666 if (len < SMB2_HDR_BODY + 2) {
3667 DEBUG(10, ("%d bytes left, expected at least %d\n",
3668 (int)len, SMB2_HDR_BODY));
3669 goto inval;
3670 }
3671 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3672 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3673 IVAL(hdr, 0)));
3674 goto inval;
3675 }
3676 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3677 DEBUG(10, ("Got HDR len %d, expected %d\n",
3678 SVAL(hdr, 4), SMB2_HDR_BODY));
3679 goto inval;
3680 }
3681
3682 full_size = len;
3683 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3684 body_size = SVAL(hdr, SMB2_HDR_BODY);
3685
3686 if (next_command_ofs != 0) {
3687 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3688 goto inval;
3689 }
3690 if (next_command_ofs > full_size) {
3691 goto inval;
3692 }
3693 full_size = next_command_ofs;
3694 }
3695 if (body_size < 2) {
3696 goto inval;
3697 }
3698 body_size &= 0xfffe;
3699
3700 if (body_size > (full_size - SMB2_HDR_BODY)) {
3701 goto inval;
3702 }
3703
3704 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3705 num_iov + 4);
3706 if (iov_tmp == NULL) {
3707 TALLOC_FREE(iov);
3708 return NT_STATUS_NO_MEMORY;
3709 }
3710 iov = iov_tmp;
3711 cur = &iov[num_iov];
3712 num_iov += 4;
3713
3714 cur[0].iov_base = tf;
3715 cur[0].iov_len = tf_len;
3716 cur[1].iov_base = hdr;
3717 cur[1].iov_len = SMB2_HDR_BODY;
3718 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3719 cur[2].iov_len = body_size;
3720 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3721 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3722
3723 taken += full_size;
3724 }
3725
3726 *piov = iov;
3727 *pnum_iov = num_iov;
3728 return NT_STATUS_OK;
3729
3730 inval:
3731 TALLOC_FREE(iov);
3732 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3733 }
3734
3735 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3736 uint64_t mid)
3737 {
3738 size_t num_pending = talloc_array_length(conn->pending);
3739 size_t i;
3740
3741 for (i=0; i<num_pending; i++) {
3742 struct tevent_req *req = conn->pending[i];
3743 struct smbXcli_req_state *state =
3744 tevent_req_data(req,
3745 struct smbXcli_req_state);
3746
3747 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3748 return req;
3749 }
3750 }
3751 return NULL;
3752 }
3753
3754 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3755 TALLOC_CTX *tmp_mem,
3756 uint8_t *inbuf)
3757 {
3758 struct tevent_req *req;
3759 struct smbXcli_req_state *state = NULL;
3760 struct iovec *iov = NULL;
3761 size_t i, num_iov = 0;
3762 NTSTATUS status;
3763 bool defer = true;
3764 struct smbXcli_session *last_session = NULL;
3765 size_t inbuf_len = smb_len_tcp(inbuf);
3766
3767 status = smb2cli_inbuf_parse_compound(conn,
3768 inbuf + NBT_HDR_SIZE,
3769 inbuf_len,
3770 tmp_mem,
3771 &iov, &num_iov);
3772 if (!NT_STATUS_IS_OK(status)) {
3773 return status;
3774 }
3775
3776 for (i=0; i<num_iov; i+=4) {
3777 uint8_t *inbuf_ref = NULL;
3778 struct iovec *cur = &iov[i];
3779 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3780 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3781 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3782 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3783 uint16_t req_opcode;
3784 uint32_t req_flags;
3785 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3786 uint32_t new_credits;
3787 struct smbXcli_session *session = NULL;
3788 struct smb2_signing_key *signing_key = NULL;
3789 bool was_encrypted = false;
3790
3791 new_credits = conn->smb2.cur_credits;
3792 new_credits += credits;
3793 if (new_credits > UINT16_MAX) {
3794 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3795 }
3796 conn->smb2.cur_credits += credits;
3797
3798 req = smb2cli_conn_find_pending(conn, mid);
3799 if (req == NULL) {
3800 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3801 }
3802 state = tevent_req_data(req, struct smbXcli_req_state);
3803
3804 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3805 if (opcode != req_opcode) {
3806 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3807 }
3808 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3809
3810 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3811 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3812 }
3813
3814 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3815 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3816 NT_STATUS_EQUAL(status, NT_STATUS_PENDING)) {
3817 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3818
3819 if (state->smb2.got_async) {
3820 /* We only expect one STATUS_PENDING response */
3821 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3822 }
3823 state->smb2.got_async = true;
3824
3825 /*
3826 * async interim responses are not signed,
3827 * even if the SMB2_HDR_FLAG_SIGNED flag
3828 * is set.
3829 */
3830 state->smb2.cancel_flags |= SMB2_HDR_FLAG_ASYNC;
3831 state->smb2.cancel_aid = async_id;
3832
3833 if (state->smb2.notify_async) {
3834 tevent_req_defer_callback(req, state->ev);
3835 tevent_req_notify_callback(req);
3836 }
3837 continue;
3838 }
3839
3840 session = state->session;
3841 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3842 session = last_session;
3843 }
3844 last_session = session;
3845
3846 if (flags & SMB2_HDR_FLAG_SIGNED) {
3847 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3848
3849 if (session == NULL) {
3850 session = smbXcli_session_by_uid(state->conn,
3851 uid);
3852 }
3853
3854 if (session == NULL) {
3855 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3856 }
3857
3858 last_session = session;
3859 signing_key = session->smb2_channel.signing_key;
3860 }
3861
3862 if (opcode == SMB2_OP_SESSSETUP) {
3863 /*
3864 * We prefer the channel signing key, if it is
3865 * already there.
3866 *
3867 * If we do not have a channel signing key yet,
3868 * we try the main signing key, if it is not
3869 * the final response.
3870 */
3871 if (signing_key != NULL &&
3872 !smb2_signing_key_valid(signing_key) &&
3873 !NT_STATUS_IS_OK(status)) {
3874 signing_key = session->smb2->signing_key;
3875 }
3876
3877 if (signing_key != NULL &&
3878 !smb2_signing_key_valid(signing_key)) {
3879 /*
3880 * If we do not have a session key to
3881 * verify the signature, we defer the
3882 * signing check to the caller.
3883 *
3884 * The caller gets NT_STATUS_OK, it
3885 * has to call
3886 * smb2cli_session_set_session_key()
3887 * or
3888 * smb2cli_session_set_channel_key()
3889 * which will check the signature
3890 * with the channel signing key.
3891 */
3892 signing_key = NULL;
3893 }
3894
3895 if (!NT_STATUS_IS_OK(status)) {
3896 /*
3897 * Only check the signature of the last response
3898 * of a successful session auth. This matches
3899 * Windows behaviour for NTLM auth and reauth.
3900 */
3901 state->smb2.require_signed_response = false;
3902 }
3903 }
3904
3905 if (state->smb2.should_sign ||
3906 state->smb2.require_signed_response)
3907 {
3908 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3909 return NT_STATUS_ACCESS_DENIED;
3910 }
3911 }
3912
3913 if (!smb2_signing_key_valid(signing_key) &&
3914 state->smb2.require_signed_response) {
3915 signing_key = session->smb2_channel.signing_key;
3916 }
3917
3918 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3919 const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3920 uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3921
3922 /*
3923 * If the response was encrypted in a SMB2_TRANSFORM
3924 * pdu, which belongs to the correct session,
3925 * we do not need to do signing checks
3926 *
3927 * It could be the session the response belongs to
3928 * or the session that was used to encrypt the
3929 * SMB2_TRANSFORM request.
3930 */
3931 if ((session && session->smb2->session_id == uid) ||
3932 (state->smb2.encryption_session_id == uid)) {
3933 signing_key = NULL;
3934 was_encrypted = true;
3935 }
3936 }
3937
3938 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3939 /*
3940 * if the server returns NT_STATUS_USER_SESSION_DELETED
3941 * the response is not signed and we should
3942 * propagate the NT_STATUS_USER_SESSION_DELETED
3943 * status to the caller.
3944 */
3945 state->smb2.signing_skipped = true;
3946 signing_key = NULL;
3947 }
3948 if (NT_STATUS_EQUAL(status, NT_STATUS_REQUEST_OUT_OF_SEQUENCE)) {
3949 /*
3950 * if the server returns
3951 * NT_STATUS_REQUEST_OUT_OF_SEQUENCE for a session setup
3952 * request, the response is not signed and we should
3953 * propagate the NT_STATUS_REQUEST_OUT_OF_SEQUENCE
3954 * status to the caller
3955 */
3956 if (opcode == SMB2_OP_SESSSETUP) {
3957 state->smb2.signing_skipped = true;
3958 signing_key = NULL;
3959 }
3960 }
3961 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
3962 /*
3963 * if the server returns NT_STATUS_NOT_SUPPORTED
3964 * for a session setup request, the response is not
3965 * signed and we should propagate the NT_STATUS_NOT_SUPPORTED
3966 * status to the caller.
3967 */
3968 if (opcode == SMB2_OP_SESSSETUP) {
3969 state->smb2.signing_skipped = true;
3970 signing_key = NULL;
3971 }
3972 }
3973 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
3974 /*
3975 * if the server returns
3976 * NT_STATUS_ACCESS_DENIED for a session setup
3977 * request, the response is not signed and we should
3978 * propagate the NT_STATUS_ACCESS_DENIED
3979 * status to the caller without disconnecting
3980 * the connection because we where not able to
3981 * verify the response signature.
3982 */
3983 if (opcode == SMB2_OP_SESSSETUP) {
3984 state->smb2.signing_skipped = true;
3985 signing_key = NULL;
3986 }
3987 }
3988
3989 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3990 /*
3991 * if the server returns
3992 * NT_STATUS_INVALID_PARAMETER
3993 * the response might not be encrypted.
3994 */
3995 if (state->smb2.should_encrypt && !was_encrypted) {
3996 state->smb2.signing_skipped = true;
3997 signing_key = NULL;
3998 }
3999 }
4000
4001 if (state->smb2.should_encrypt && !was_encrypted) {
4002 if (!state->smb2.signing_skipped) {
4003 return NT_STATUS_ACCESS_DENIED;
4004 }
4005 }
4006
4007 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
4008 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
4009 (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
4010 session != NULL &&
4011 session->smb2->no_signing_disconnect) ||
4012 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
4013 /*
4014 * if the server returns
4015 * NT_STATUS_NETWORK_NAME_DELETED
4016 * NT_STATUS_FILE_CLOSED
4017 * NT_STATUS_INVALID_PARAMETER
4018 * the response might not be signed
4019 * as this happens before the signing checks.
4020 *
4021 * If server echos the signature (or all zeros)
4022 * we should report the status from the server
4023 * to the caller.
4024 */
4025 if (signing_key) {
4026 bool cmp;
4027
4028 cmp = mem_equal_const_time(inhdr+SMB2_HDR_SIGNATURE,
4029 state->smb2.hdr+SMB2_HDR_SIGNATURE,
4030 16);
4031 if (cmp) {
4032 state->smb2.signing_skipped = true;
4033 signing_key = NULL;
4034 }
4035 }
4036 if (signing_key) {
4037 bool zero;
4038 zero = all_zero(inhdr+SMB2_HDR_SIGNATURE, 16);
4039 if (zero) {
4040 state->smb2.signing_skipped = true;
4041 signing_key = NULL;
4042 }
4043 }
4044 }
4045
4046 if (signing_key) {
4047 NTSTATUS signing_status;
4048
4049 signing_status = smb2_signing_check_pdu(signing_key,
4050 &cur[1], 3);
4051 if (!NT_STATUS_IS_OK(signing_status)) {
4052 /*
4053 * If the signing check fails, we disconnect
4054 * the connection.
4055 *
4056 * Unless
4057 * smb2cli_session_torture_no_signing_disconnect
4058 * was called in torture tests
4059 */
4060
4061 if (!NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
4062 return signing_status;
4063 }
4064
4065 if (!NT_STATUS_EQUAL(status, signing_status)) {
4066 return signing_status;
4067 }
4068
4069 if (session == NULL) {
4070 return signing_status;
4071 }
4072
4073 if (!session->smb2->no_signing_disconnect) {
4074 return signing_status;
4075 }
4076
4077 state->smb2.signing_skipped = true;
4078 }
4079 }
4080
4081 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
4082 (session != NULL) && session->disconnect_expired)
4083 {
4084 /*
4085 * this should be a short term hack
4086 * until the upper layers have implemented
4087 * re-authentication.
4088 */
4089 return status;
4090 }
4091
4092 smbXcli_req_unset_pending(req);
4093
4094 /*
4095 * There might be more than one response
4096 * we need to defer the notifications
4097 */
4098 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
4099 defer = false;
4100 }
4101
4102 if (defer) {
4103 tevent_req_defer_callback(req, state->ev);
4104 }
4105
4106 /*
4107 * Note: here we use talloc_reference() in a way
4108 * that does not expose it to the caller.
4109 */
4110 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
4111 if (tevent_req_nomem(inbuf_ref, req)) {
4112 continue;
4113 }
4114
4115 /* copy the related buffers */
4116 state->smb2.recv_iov[0] = cur[1];
4117 state->smb2.recv_iov[1] = cur[2];
4118 state->smb2.recv_iov[2] = cur[3];
4119
4120 tevent_req_done(req);
4121 }
4122
4123 if (defer) {
4124 return NT_STATUS_RETRY;
4125 }
4126
4127 return NT_STATUS_OK;
4128 }
4129
4130 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
4131 struct iovec **piov,
4132 const struct smb2cli_req_expected_response *expected,
4133 size_t num_expected)
4134 {
4135 struct smbXcli_req_state *state =
4136 tevent_req_data(req,
4137 struct smbXcli_req_state);
4138 NTSTATUS status;
4139 size_t body_size;
4140 bool found_status = false;
4141 bool found_size = false;
4142 size_t i;
4143
4144 if (piov != NULL) {
4145 *piov = NULL;
4146 }
4147
4148 if (tevent_req_is_in_progress(req) && state->smb2.got_async) {
4149 return NT_STATUS_PENDING;
4150 }
4151
4152 if (tevent_req_is_nterror(req, &status)) {
4153 for (i=0; i < num_expected; i++) {
4154 if (NT_STATUS_EQUAL(status, expected[i].status)) {
4155 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
4156 }
4157 }
4158
4159 return status;
4160 }
4161
4162 if (num_expected == 0) {
4163 found_status = true;
4164 found_size = true;
4165 }
4166
4167 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
4168 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
4169
4170 for (i=0; i < num_expected; i++) {
4171 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
4172 continue;
4173 }
4174
4175 found_status = true;
4176 if (expected[i].body_size == 0) {
4177 found_size = true;
4178 break;
4179 }
4180
4181 if (expected[i].body_size == body_size) {
4182 found_size = true;
4183 break;
4184 }
4185 }
4186
4187 if (!found_status) {
4188 return status;
4189 }
4190
4191 if (state->smb2.signing_skipped) {
4192 if (num_expected > 0) {
4193 return NT_STATUS_ACCESS_DENIED;
4194 }
4195 if (!NT_STATUS_IS_ERR(status)) {
4196 return NT_STATUS_ACCESS_DENIED;
4197 }
4198 }
4199
4200 if (!found_size) {
4201 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4202 }
4203
4204 if (piov != NULL) {
4205 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
4206 }
4207
4208 return status;
4209 }
4210
4211 NTSTATUS smb2cli_req_get_sent_iov(struct tevent_req *req,
4212 struct iovec *sent_iov)
4213 {
4214 struct smbXcli_req_state *state =
4215 tevent_req_data(req,
4216 struct smbXcli_req_state);
4217
4218 if (tevent_req_is_in_progress(req)) {
4219 return NT_STATUS_PENDING;
4220 }
4221
4222 sent_iov[0].iov_base = state->smb2.hdr;
4223 sent_iov[0].iov_len = sizeof(state->smb2.hdr);
4224
4225 sent_iov[1].iov_base = discard_const(state->smb2.fixed);
4226 sent_iov[1].iov_len = state->smb2.fixed_len;
4227
4228 if (state->smb2.dyn != NULL) {
4229 sent_iov[2].iov_base = discard_const(state->smb2.dyn);
4230 sent_iov[2].iov_len = state->smb2.dyn_len;
4231 } else {
4232 sent_iov[2].iov_base = NULL;
4233 sent_iov[2].iov_len = 0;
4234 }
4235
4236 return NT_STATUS_OK;
4237 }
4238
4239 static const struct {
4240 enum protocol_types proto;
4241 const char *smb1_name;
4242 } smb1cli_prots[] = {
4243 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
4244 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
4245 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
4246 {PROTOCOL_LANMAN1, "LANMAN1.0"},
4247 {PROTOCOL_LANMAN2, "LM1.2X002"},
4248 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
4249 {PROTOCOL_LANMAN2, "LANMAN2.1"},
4250 {PROTOCOL_LANMAN2, "Samba"},
4251 {PROTOCOL_NT1, "NT LANMAN 1.0"},
4252 {PROTOCOL_NT1, "NT LM 0.12"},
4253 {PROTOCOL_SMB2_02, "SMB 2.002"},
4254 {PROTOCOL_SMB2_10, "SMB 2.???"},
4255 };
4256
4257 static const struct {
4258 enum protocol_types proto;
4259 uint16_t smb2_dialect;
4260 } smb2cli_prots[] = {
4261 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
4262 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
4263 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
4264 {PROTOCOL_SMB3_02, SMB3_DIALECT_REVISION_302},
4265 {PROTOCOL_SMB3_11, SMB3_DIALECT_REVISION_311},
4266 };
4267
4268 struct smbXcli_negprot_state {
4269 struct smbXcli_conn *conn;
4270 struct tevent_context *ev;
4271 struct smb2_negotiate_contexts *in_ctx;
4272 struct smb2_negotiate_contexts *out_ctx;
4273 uint32_t timeout_msec;
4274
4275 struct {
4276 uint8_t fixed[36];
4277 } smb2;
4278 };
4279
4280 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
4281 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
4282 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
4283 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
4284 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
4285 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4286 TALLOC_CTX *frame,
4287 uint8_t *inbuf);
4288
4289 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
4290 struct tevent_context *ev,
4291 struct smbXcli_conn *conn,
4292 uint32_t timeout_msec,
4293 enum protocol_types min_protocol,
4294 enum protocol_types max_protocol,
4295 uint16_t max_credits,
4296 struct smb2_negotiate_contexts *in_ctx)
4297 {
4298 struct tevent_req *req, *subreq;
4299 struct smbXcli_negprot_state *state;
4300
4301 req = tevent_req_create(mem_ctx, &state,
4302 struct smbXcli_negprot_state);
4303 if (req == NULL) {
4304 return NULL;
4305 }
4306 state->conn = conn;
4307 state->ev = ev;
4308 state->in_ctx = in_ctx;
4309 state->timeout_msec = timeout_msec;
4310
4311 if (min_protocol == PROTOCOL_NONE) {
4312 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
4313 return tevent_req_post(req, ev);
4314 }
4315
4316 if (max_protocol == PROTOCOL_NONE) {
4317 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
4318 return tevent_req_post(req, ev);
4319 }
4320
4321 if (min_protocol > max_protocol) {
4322 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
4323 return tevent_req_post(req, ev);
4324 }
4325
4326 conn->min_protocol = min_protocol;
4327 conn->max_protocol = max_protocol;
4328 conn->protocol = PROTOCOL_NONE;
4329
4330 if (max_protocol >= PROTOCOL_SMB2_02) {
4331 conn->smb2.max_credits = max_credits;
4332 }
4333
4334 if ((min_protocol < PROTOCOL_SMB2_02) &&
4335 (max_protocol < PROTOCOL_SMB2_02)) {
4336 /*
4337 * SMB1 only...
4338 */
4339 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4340
4341 subreq = smbXcli_negprot_smb1_subreq(state);
4342 if (tevent_req_nomem(subreq, req)) {
4343 return tevent_req_post(req, ev);
4344 }
4345 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4346 return req;
4347 }
4348
4349 if ((min_protocol >= PROTOCOL_SMB2_02) &&
4350 (max_protocol >= PROTOCOL_SMB2_02)) {
4351 /*
4352 * SMB2 only...
4353 */
4354 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4355
4356 subreq = smbXcli_negprot_smb2_subreq(state);
4357 if (tevent_req_nomem(subreq, req)) {
4358 return tevent_req_post(req, ev);
4359 }
4360 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4361 return req;
4362 }
4363
4364 /*
4365 * We send an SMB1 negprot with the SMB2 dialects
4366 * and expect a SMB1 or a SMB2 response.
4367 *
4368 * smbXcli_negprot_dispatch_incoming() will fix the
4369 * callback to match protocol of the response.
4370 */
4371 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
4372
4373 subreq = smbXcli_negprot_smb1_subreq(state);
4374 if (tevent_req_nomem(subreq, req)) {
4375 return tevent_req_post(req, ev);
4376 }
4377 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
4378 return req;
4379 }
4380
4381 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
4382 {
4383 struct tevent_req *req =
4384 tevent_req_callback_data(subreq,
4385 struct tevent_req);
4386 NTSTATUS status;
4387
4388 /*
4389 * we just want the low level error
4390 */
4391 status = tevent_req_simple_recv_ntstatus(subreq);
4392 TALLOC_FREE(subreq);
4393 if (tevent_req_nterror(req, status)) {
4394 return;
4395 }
4396
4397 /* this should never happen */
4398 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
4399 }
4400
4401 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
4402 {
4403 size_t i;
4404 DATA_BLOB bytes = data_blob_null;
4405 uint8_t flags;
4406 uint16_t flags2;
4407
4408 /* setup the protocol strings */
4409 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4410 uint8_t c = 2;
4411 bool ok;
4412
4413 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4414 continue;
4415 }
4416
4417 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4418 continue;
4419 }
4420
4421 ok = data_blob_append(state, &bytes, &c, sizeof(c));
4422 if (!ok) {
4423 return NULL;
4424 }
4425
4426 /*
4427 * We know it is already ascii and
4428 * we want NULL termination.
4429 */
4430 ok = data_blob_append(state, &bytes,
4431 smb1cli_prots[i].smb1_name,
4432 strlen(smb1cli_prots[i].smb1_name)+1);
4433 if (!ok) {
4434 return NULL;
4435 }
4436 }
4437
4438 smb1cli_req_flags(state->conn->max_protocol,
4439 state->conn->smb1.client.capabilities,
4440 SMBnegprot,
4441 0, 0, &flags,
4442 0, 0, &flags2);
4443
4444 return smb1cli_req_send(state, state->ev, state->conn,
4445 SMBnegprot,
4446 flags, ~flags,
4447 flags2, ~flags2,
4448 state->timeout_msec,
4449 0xFFFE, 0, NULL, /* pid, tid, session */
4450 0, NULL, /* wct, vwv */
4451 bytes.length, bytes.data);
4452 }
4453
4454 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
4455 {
4456 struct tevent_req *req =
4457 tevent_req_callback_data(subreq,
4458 struct tevent_req);
4459 struct smbXcli_negprot_state *state =
4460 tevent_req_data(req,
4461 struct smbXcli_negprot_state);
4462 struct smbXcli_conn *conn = state->conn;
4463 struct iovec *recv_iov = NULL;
4464 uint8_t *inhdr = NULL;
4465 uint8_t wct;
4466 uint16_t *vwv;
4467 uint32_t num_bytes;
4468 uint8_t *bytes;
4469 NTSTATUS status;
4470 uint16_t protnum;
4471 size_t i;
4472 size_t num_prots = 0;
4473 uint8_t flags;
4474 uint32_t client_capabilities = conn->smb1.client.capabilities;
4475 uint32_t both_capabilities;
4476 uint32_t server_capabilities = 0;
4477 uint32_t capabilities;
4478 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
4479 uint32_t server_max_xmit = 0;
4480 uint32_t max_xmit;
4481 uint32_t server_max_mux = 0;
4482 uint16_t server_security_mode = 0;
4483 uint32_t server_session_key = 0;
4484 bool server_readbraw = false;
4485 bool server_writebraw = false;
4486 bool server_lockread = false;
4487 bool server_writeunlock = false;
4488 struct GUID server_guid = GUID_zero();
4489 DATA_BLOB server_gss_blob = data_blob_null;
4490 uint8_t server_challenge[8];
4491 char *server_workgroup = NULL;
4492 char *server_name = NULL;
4493 int server_time_zone = 0;
4494 NTTIME server_system_time = 0;
4495 static const struct smb1cli_req_expected_response expected[] = {
4496 {
4497 .status = NT_STATUS_OK,
4498 .wct = 0x11, /* NT1 */
4499 },
4500 {
4501 .status = NT_STATUS_OK,
4502 .wct = 0x0D, /* LM */
4503 },
4504 {
4505 .status = NT_STATUS_OK,
4506 .wct = 0x01, /* CORE */
4507 }
4508 };
4509
4510 ZERO_STRUCT(server_challenge);
4511
4512 status = smb1cli_req_recv(subreq, state,
4513 &recv_iov,
4514 &inhdr,
4515 &wct,
4516 &vwv,
4517 NULL, /* pvwv_offset */
4518 &num_bytes,
4519 &bytes,
4520 NULL, /* pbytes_offset */
4521 NULL, /* pinbuf */
4522 expected, ARRAY_SIZE(expected));
4523 TALLOC_FREE(subreq);
4524 if (tevent_req_nterror(req, status)) {
4525 return;
4526 }
4527 if (inhdr == NULL) {
4528 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
4529 return;
4530 }
4531
4532 flags = CVAL(inhdr, HDR_FLG);
4533
4534 protnum = SVAL(vwv, 0);
4535
4536 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4537 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4538 continue;
4539 }
4540
4541 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4542 continue;
4543 }
4544
4545 if (protnum != num_prots) {
4546 num_prots++;
4547 continue;
4548 }
4549
4550 conn->protocol = smb1cli_prots[i].proto;
4551 break;
4552 }
4553
4554 if (conn->protocol == PROTOCOL_NONE) {
4555 DBG_ERR("No compatible protocol selected by server.\n");
4556 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4557 return;
4558 }
4559
4560 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
4561 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
4562 "and the selected protocol level doesn't support it.\n"));
4563 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4564 return;
4565 }
4566
4567 if (flags & FLAG_SUPPORT_LOCKREAD) {
4568 server_lockread = true;
4569 server_writeunlock = true;
4570 }
4571
4572 if (conn->protocol >= PROTOCOL_NT1) {
4573 const char *client_signing = NULL;
4574 bool server_mandatory = false;
4575 bool server_allowed = false;
4576 const char *server_signing = NULL;
4577 bool ok;
4578 uint8_t key_len;
4579
4580 if (wct != 0x11) {
4581 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4582 return;
4583 }
4584
4585 /* NT protocol */
4586 server_security_mode = CVAL(vwv + 1, 0);
4587 server_max_mux = SVAL(vwv + 1, 1);
4588 server_max_xmit = IVAL(vwv + 3, 1);
4589 server_session_key = IVAL(vwv + 7, 1);
4590 server_time_zone = SVALS(vwv + 15, 1);
4591 server_time_zone *= 60;
4592 /* this time arrives in real GMT */
4593 server_system_time = BVAL(vwv + 11, 1);
4594 server_capabilities = IVAL(vwv + 9, 1);
4595
4596 key_len = CVAL(vwv + 16, 1);
4597
4598 if (server_capabilities & CAP_RAW_MODE) {
4599 server_readbraw = true;
4600 server_writebraw = true;
4601 }
4602 if (server_capabilities & CAP_LOCK_AND_READ) {
4603 server_lockread = true;
4604 }
4605
4606 if (server_capabilities & CAP_EXTENDED_SECURITY) {
4607 DATA_BLOB blob1, blob2;
4608
4609 if (num_bytes < 16) {
4610 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4611 return;
4612 }
4613
4614 blob1 = data_blob_const(bytes, 16);
4615 status = GUID_from_data_blob(&blob1, &server_guid);
4616 if (tevent_req_nterror(req, status)) {
4617 return;
4618 }
4619
4620 blob1 = data_blob_const(bytes+16, num_bytes-16);
4621 blob2 = data_blob_dup_talloc(state, blob1);
4622 if (blob1.length > 0 &&
4623 tevent_req_nomem(blob2.data, req)) {
4624 return;
4625 }
4626 server_gss_blob = blob2;
4627 } else {
4628 DATA_BLOB blob1, blob2;
4629
4630 if (num_bytes < key_len) {
4631 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4632 return;
4633 }
4634
4635 if (key_len != 0 && key_len != 8) {
4636 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4637 return;
4638 }
4639
4640 if (key_len == 8) {
4641 memcpy(server_challenge, bytes, 8);
4642 }
4643
4644 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4645 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
4646 if (blob1.length > 0) {
4647 size_t len;
4648
4649 len = utf16_null_terminated_len_n(blob1.data,
4650 blob1.length);
4651 blob1.length = len;
4652
4653 ok = convert_string_talloc(state,
4654 CH_UTF16LE,
4655 CH_UNIX,
4656 blob1.data,
4657 blob1.length,
4658 &server_workgroup,
4659 &len);
4660 if (!ok) {
4661 status = map_nt_error_from_unix_common(errno);
4662 tevent_req_nterror(req, status);
4663 return;
4664 }
4665 }
4666
4667 blob2.data += blob1.length;
4668 blob2.length -= blob1.length;
4669 if (blob2.length > 0) {
4670 size_t len;
4671
4672 ok = convert_string_talloc(state,
4673 CH_UTF16LE,
4674 CH_UNIX,
4675 blob2.data,
4676 blob2.length,
4677 &server_name,
4678 &len);
4679 if (!ok) {
4680 status = map_nt_error_from_unix_common(errno);
4681 tevent_req_nterror(req, status);
4682 return;
4683 }
4684 }
4685 }
4686
4687 client_signing = "disabled";
4688 if (conn->allow_signing) {
4689 client_signing = "allowed";
4690 }
4691 if (conn->mandatory_signing) {
4692 client_signing = "required";
4693 }
4694
4695 server_signing = "not supported";
4696 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4697 server_signing = "supported";
4698 server_allowed = true;
4699 } else if (conn->mandatory_signing) {
4700 /*
4701 * We have mandatory signing as client
4702 * lets assume the server will look at our
4703 * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4704 * flag in the session setup
4705 */
4706 server_signing = "not announced";
4707 server_allowed = true;
4708 }
4709 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4710 server_signing = "required";
4711 server_mandatory = true;
4712 }
4713
4714 ok = smb1_signing_set_negotiated(conn->smb1.signing,
4715 server_allowed,
4716 server_mandatory);
4717 if (!ok) {
4718 DEBUG(1,("cli_negprot: SMB signing is required, "
4719 "but client[%s] and server[%s] mismatch\n",
4720 client_signing, server_signing));
4721 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4722 return;
4723 }
4724
4725 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4726 DATA_BLOB blob1;
4727 uint8_t key_len;
4728 time_t t;
4729
4730 if (wct != 0x0D) {
4731 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4732 return;
4733 }
4734
4735 server_security_mode = SVAL(vwv + 1, 0);
4736 server_max_xmit = SVAL(vwv + 2, 0);
4737 server_max_mux = SVAL(vwv + 3, 0);
4738 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4739 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4740 server_session_key = IVAL(vwv + 6, 0);
4741 server_time_zone = SVALS(vwv + 10, 0);
4742 server_time_zone *= 60;
4743 /* this time is converted to GMT by make_unix_date */
4744 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4745 unix_to_nt_time(&server_system_time, t);
4746 key_len = SVAL(vwv + 11, 0);
4747
4748 if (num_bytes < key_len) {
4749 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4750 return;
4751 }
4752
4753 if (key_len != 0 && key_len != 8) {
4754 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4755 return;
4756 }
4757
4758 if (key_len == 8) {
4759 memcpy(server_challenge, bytes, 8);
4760 }
4761
4762 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4763 if (blob1.length > 0) {
4764 size_t len;
4765 bool ok;
4766
4767 len = utf16_null_terminated_len_n(blob1.data,
4768 blob1.length);
4769 blob1.length = len;
4770
4771 ok = convert_string_talloc(state,
4772 CH_DOS,
4773 CH_UNIX,
4774 blob1.data,
4775 blob1.length,
4776 &server_workgroup,
4777 &len);
4778 if (!ok) {
4779 status = map_nt_error_from_unix_common(errno);
4780 tevent_req_nterror(req, status);
4781 return;
4782 }
4783 }
4784
4785 } else {
4786 /* the old core protocol */
4787 server_time_zone = get_time_zone(time(NULL));
4788 server_max_xmit = 1024;
4789 server_max_mux = 1;
4790 }
4791
4792 if (server_max_xmit < 1024) {
4793 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4794 return;
4795 }
4796
4797 if (server_max_mux < 1) {
4798 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4799 return;
4800 }
4801
4802 /*
4803 * Now calculate the negotiated capabilities
4804 * based on the mask for:
4805 * - client only flags
4806 * - flags used in both directions
4807 * - server only flags
4808 */
4809 both_capabilities = client_capabilities & server_capabilities;
4810 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4811 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4812 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4813
4814 max_xmit = MIN(client_max_xmit, server_max_xmit);
4815
4816 conn->smb1.server.capabilities = server_capabilities;
4817 conn->smb1.capabilities = capabilities;
4818
4819 conn->smb1.server.max_xmit = server_max_xmit;
4820 conn->smb1.max_xmit = max_xmit;
4821
4822 conn->smb1.server.max_mux = server_max_mux;
4823
4824 conn->smb1.server.security_mode = server_security_mode;
4825
4826 conn->smb1.server.readbraw = server_readbraw;
4827 conn->smb1.server.writebraw = server_writebraw;
4828 conn->smb1.server.lockread = server_lockread;
4829 conn->smb1.server.writeunlock = server_writeunlock;
4830
4831 conn->smb1.server.session_key = server_session_key;
4832
4833 talloc_steal(conn, server_gss_blob.data);
4834 conn->smb1.server.gss_blob = server_gss_blob;
4835 conn->smb1.server.guid = server_guid;
4836 memcpy(conn->smb1.server.challenge, server_challenge, 8);
4837 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4838 conn->smb1.server.name = talloc_move(conn, &server_name);
4839
4840 conn->smb1.server.time_zone = server_time_zone;
4841 conn->smb1.server.system_time = server_system_time;
4842
4843 tevent_req_done(req);
4844 }
4845
4846 static size_t smbXcli_padding_helper(uint32_t offset, size_t n)
4847 {
4848 if ((offset & (n-1)) == 0) return 0;
4849 return n - (offset & (n-1));
4850 }
4851
4852 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4853 {
4854 size_t i;
4855 uint8_t *buf;
4856 uint16_t dialect_count = 0;
4857 DATA_BLOB dyn = data_blob_null;
4858
4859 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4860 bool ok;
4861 uint8_t val[2];
4862
4863 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4864 continue;
4865 }
4866
4867 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4868 continue;
4869 }
4870
4871 SSVAL(val, 0, smb2cli_prots[i].smb2_dialect);
4872
4873 ok = data_blob_append(state, &dyn, val, sizeof(val));
4874 if (!ok) {
4875 return NULL;
4876 }
4877
4878 dialect_count++;
4879 }
4880
4881 buf = state->smb2.fixed;
4882 SSVAL(buf, 0, 36);
4883 SSVAL(buf, 2, dialect_count);
4884 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4885 SSVAL(buf, 6, 0); /* Reserved */
4886 if (state->conn->max_protocol >= PROTOCOL_SMB3_00) {
4887 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4888 } else {
4889 SIVAL(buf, 8, 0); /* Capabilities */
4890 }
4891 if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
4892 struct GUID_ndr_buf guid_buf = { .buf = {0}, };
4893
4894 GUID_to_ndr_buf(&state->conn->smb2.client.guid, &guid_buf);
4895 memcpy(buf+12, guid_buf.buf, 16); /* ClientGuid */
4896 } else {
4897 memset(buf+12, 0, 16); /* ClientGuid */
4898 }
4899
4900 if (state->conn->max_protocol >= PROTOCOL_SMB3_11) {
4901 const struct smb3_signing_capabilities *client_sign_algos =
4902 &state->conn->smb2.client.smb3_capabilities.signing;
4903 const struct smb3_encryption_capabilities *client_ciphers =
4904 &state->conn->smb2.client.smb3_capabilities.encryption;
4905 NTSTATUS status;
4906 struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4907 uint8_t *netname_utf16 = NULL;
4908 size_t netname_utf16_len = 0;
4909 uint32_t offset;
4910 DATA_BLOB b;
4911 uint8_t p[38];
4912 const uint8_t zeros[8] = {0, };
4913 size_t pad;
4914 bool ok;
4915
4916 SSVAL(p, 0, 1); /* HashAlgorithmCount */
4917 SSVAL(p, 2, 32); /* SaltLength */
4918 SSVAL(p, 4, SMB2_PREAUTH_INTEGRITY_SHA512);
4919 generate_random_buffer(p + 6, 32);
4920
4921 status = smb2_negotiate_context_add(
4922 state, &c, SMB2_PREAUTH_INTEGRITY_CAPABILITIES, p, 38);
4923 if (!NT_STATUS_IS_OK(status)) {
4924 return NULL;
4925 }
4926
4927 if (client_ciphers->num_algos > 0) {
4928 size_t ofs = 0;
4929 SSVAL(p, ofs, client_ciphers->num_algos);
4930 ofs += 2;
4931
4932 for (i = 0; i < client_ciphers->num_algos; i++) {
4933 size_t next_ofs = ofs + 2;
4934 SMB_ASSERT(next_ofs < ARRAY_SIZE(p));
4935 SSVAL(p, ofs, client_ciphers->algos[i]);
4936 ofs = next_ofs;
4937 }
4938
4939 status = smb2_negotiate_context_add(
4940 state, &c, SMB2_ENCRYPTION_CAPABILITIES, p, ofs);
4941 if (!NT_STATUS_IS_OK(status)) {
4942 return NULL;
4943 }
4944 }
4945
4946 if (client_sign_algos->num_algos > 0) {
4947 size_t ofs = 0;
4948 SSVAL(p, ofs, client_sign_algos->num_algos);
4949 ofs += 2;
4950
4951 for (i = 0; i < client_sign_algos->num_algos; i++) {
4952 size_t next_ofs = ofs + 2;
4953 SMB_ASSERT(next_ofs < ARRAY_SIZE(p));
4954 SSVAL(p, ofs, client_sign_algos->algos[i]);
4955 ofs = next_ofs;
4956 }
4957
4958 status = smb2_negotiate_context_add(
4959 state, &c, SMB2_SIGNING_CAPABILITIES, p, ofs);
4960 if (!NT_STATUS_IS_OK(status)) {
4961 return NULL;
4962 }
4963 }
4964
4965 ok = convert_string_talloc(state, CH_UNIX, CH_UTF16,
4966 state->conn->remote_name,
4967 strlen(state->conn->remote_name),
4968 &netname_utf16, &netname_utf16_len);
4969 if (!ok) {
4970 return NULL;
4971 }
4972
4973 status = smb2_negotiate_context_add(state, &c,
4974 SMB2_NETNAME_NEGOTIATE_CONTEXT_ID,
4975 netname_utf16, netname_utf16_len);
4976 if (!NT_STATUS_IS_OK(status)) {
4977 return NULL;
4978 }
4979
4980 if (state->in_ctx != NULL) {
4981 struct smb2_negotiate_contexts *ctxs = state->in_ctx;
4982
4983 for (i=0; i<ctxs->num_contexts; i++) {
4984 struct smb2_negotiate_context *ctx =
4985 &ctxs->contexts[i];
4986
4987 status = smb2_negotiate_context_add(
4988 state,
4989 &c,
4990 ctx->type,
4991 ctx->data.data,
4992 ctx->data.length);
4993 if (!NT_STATUS_IS_OK(status)) {
4994 return NULL;
4995 }
4996 }
4997 }
4998
4999 status = smb2_negotiate_context_push(state, &b, c);
5000 if (!NT_STATUS_IS_OK(status)) {
5001 return NULL;
5002 }
5003
5004 offset = SMB2_HDR_BODY + sizeof(state->smb2.fixed) + dyn.length;
5005 pad = smbXcli_padding_helper(offset, 8);
5006
5007 ok = data_blob_append(state, &dyn, zeros, pad);
5008 if (!ok) {
5009 return NULL;
5010 }
5011 offset += pad;
5012
5013 ok = data_blob_append(state, &dyn, b.data, b.length);
5014 if (!ok) {
5015 return NULL;
5016 }
5017
5018 SIVAL(buf, 28, offset); /* NegotiateContextOffset */
5019 SSVAL(buf, 32, c.num_contexts); /* NegotiateContextCount */
5020 SSVAL(buf, 34, 0); /* Reserved */
5021 } else {
5022 SBVAL(buf, 28, 0); /* Reserved/ClientStartTime */
5023 }
5024
5025 return smb2cli_req_send(state, state->ev,
5026 state->conn, SMB2_OP_NEGPROT,
5027 0, 0, /* flags */
5028 state->timeout_msec,
5029 NULL, NULL, /* tcon, session */
5030 state->smb2.fixed, sizeof(state->smb2.fixed),
5031 dyn.data, dyn.length,
5032 UINT16_MAX); /* max_dyn_len */
5033 }
5034
5035 static NTSTATUS smbXcli_negprot_smb3_check_capabilities(struct tevent_req *req);
5036
5037 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
5038 {
5039 struct tevent_req *req =
5040 tevent_req_callback_data(subreq,
5041 struct tevent_req);
5042 struct smbXcli_negprot_state *state =
5043 tevent_req_data(req,
5044 struct smbXcli_negprot_state);
5045 struct smbXcli_conn *conn = state->conn;
5046 size_t security_offset, security_length;
5047 DATA_BLOB blob;
5048 NTSTATUS status;
5049 struct iovec *iov = NULL;
5050 uint8_t *body;
5051 size_t i;
5052 uint16_t dialect_revision;
5053 uint32_t negotiate_context_offset = 0;
5054 uint16_t negotiate_context_count = 0;
5055 DATA_BLOB negotiate_context_blob = data_blob_null;
5056 size_t avail;
5057 size_t ctx_ofs;
5058 size_t needed;
5059 struct smb2_negotiate_context *preauth = NULL;
5060 uint16_t hash_count;
5061 uint16_t salt_length;
5062 uint16_t hash_selected;
5063 gnutls_hash_hd_t hash_hnd = NULL;
5064 struct smb2_negotiate_context *sign_algo = NULL;
5065 struct smb2_negotiate_context *cipher = NULL;
5066 struct smb2_negotiate_context *posix = NULL;
5067 struct iovec sent_iov[3] = {{0}, {0}, {0}};
5068 static const struct smb2cli_req_expected_response expected[] = {
5069 {
5070 .status = NT_STATUS_OK,
5071 .body_size = 0x41
5072 }
5073 };
5074 int rc;
5075
5076 status = smb2cli_req_recv(subreq, state, &iov,
5077 expected, ARRAY_SIZE(expected));
5078 if (tevent_req_nterror(req, status)) {
5079 return;
5080 }
5081 if (iov == NULL) {
5082 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
5083 return;
5084 }
5085
5086 body = (uint8_t *)iov[1].iov_base;
5087
5088 dialect_revision = SVAL(body, 4);
5089
5090 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
5091 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
5092 continue;
5093 }
5094
5095 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
5096 continue;
5097 }
5098
5099 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
5100 continue;
5101 }
5102
5103 conn->protocol = smb2cli_prots[i].proto;
5104 break;
5105 }
5106
5107 if (conn->protocol == PROTOCOL_NONE) {
5108 TALLOC_FREE(subreq);
5109
5110 if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
5111 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5112 return;
5113 }
5114
5115 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
5116 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5117 return;
5118 }
5119
5120 /* make sure we do not loop forever */
5121 state->conn->min_protocol = PROTOCOL_SMB2_02;
5122
5123 /*
5124 * send a SMB2 negprot, in order to negotiate
5125 * the SMB2 dialect.
5126 */
5127 subreq = smbXcli_negprot_smb2_subreq(state);
5128 if (tevent_req_nomem(subreq, req)) {
5129 return;
5130 }
5131 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
5132 return;
5133 }
5134
5135 conn->smb2.server.security_mode = SVAL(body, 2);
5136 if (conn->protocol >= PROTOCOL_SMB3_11) {
5137 negotiate_context_count = SVAL(body, 6);
5138 }
5139
5140 blob = data_blob_const(body + 8, 16);
5141 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
5142 if (tevent_req_nterror(req, status)) {
5143 return;
5144 }
5145
5146 conn->smb2.server.capabilities = IVAL(body, 24);
5147 conn->smb2.server.max_trans_size= IVAL(body, 28);
5148 conn->smb2.server.max_read_size = IVAL(body, 32);
5149 conn->smb2.server.max_write_size= IVAL(body, 36);
5150 conn->smb2.server.system_time = BVAL(body, 40);
5151 conn->smb2.server.start_time = BVAL(body, 48);
5152
5153 if (conn->smb2.server.max_trans_size == 0 ||
5154 conn->smb2.server.max_read_size == 0 ||
5155 conn->smb2.server.max_write_size == 0) {
5156 /*
5157 * We can't connect to servers we can't
5158 * do any operations on.
5159 */
5160 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5161 return;
5162 }
5163
5164 security_offset = SVAL(body, 56);
5165 security_length = SVAL(body, 58);
5166
5167 if (security_offset == 0) {
5168 /*
5169 * Azure sends security_offset = 0 and security_length = 0
5170 *
5171 * We just set security_offset to the expected value
5172 * in order to allow the further logic to work
5173 * as before.
5174 */
5175 if (security_length != 0) {
5176 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5177 return;
5178 }
5179 security_offset = SMB2_HDR_BODY + iov[1].iov_len;
5180 }
5181
5182 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
5183 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5184 return;
5185 }
5186
5187 if (security_length > iov[2].iov_len) {
5188 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5189 return;
5190 }
5191
5192 conn->smb2.server.gss_blob = data_blob_talloc(conn,
5193 iov[2].iov_base,
5194 security_length);
5195 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
5196 return;
5197 }
5198
5199 if (conn->protocol >= PROTOCOL_SMB3_00) {
5200 conn->smb2.server.sign_algo = SMB2_SIGNING_AES128_CMAC;
5201 } else {
5202 conn->smb2.server.sign_algo = SMB2_SIGNING_HMAC_SHA256;
5203 }
5204
5205 if (conn->protocol < PROTOCOL_SMB3_11) {
5206 TALLOC_FREE(subreq);
5207
5208 if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
5209 conn->smb2.server.cipher = SMB2_ENCRYPTION_AES128_CCM;
5210 }
5211
5212 status = smbXcli_negprot_smb3_check_capabilities(req);
5213 if (tevent_req_nterror(req, status)) {
5214 return;
5215 }
5216
5217 tevent_req_done(req);
5218 return;
5219 }
5220
5221 /*
5222 * Here we are now at SMB3_11, so encryption should be
5223 * negotiated via context, not capabilities.
5224 */
5225
5226 if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
5227 /*
5228 * Server set SMB2_CAP_ENCRYPTION capability,
5229 * but *SHOULD* not, not *MUST* not. Just mask it off.
5230 * NetApp seems to do this:
5231 * BUG: https://bugzilla.samba.org/show_bug.cgi?id=13009
5232 */
5233 conn->smb2.server.capabilities &= ~SMB2_CAP_ENCRYPTION;
5234 }
5235
5236 negotiate_context_offset = IVAL(body, 60);
5237 if (negotiate_context_offset < security_offset) {
5238 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5239 return;
5240 }
5241
5242 ctx_ofs = negotiate_context_offset - security_offset;
5243 if (ctx_ofs > iov[2].iov_len) {
5244 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5245 return;
5246 }
5247 avail = iov[2].iov_len - security_length;
5248 needed = iov[2].iov_len - ctx_ofs;
5249 if (needed > avail) {
5250 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5251 return;
5252 }
5253
5254 negotiate_context_blob.data = (uint8_t *)iov[2].iov_base;
5255 negotiate_context_blob.length = iov[2].iov_len;
5256
5257 negotiate_context_blob.data += ctx_ofs;
5258 negotiate_context_blob.length -= ctx_ofs;
5259
5260 state->out_ctx = talloc_zero(state, struct smb2_negotiate_contexts);
5261 if (tevent_req_nomem(state->out_ctx, req)) {
5262 return;
5263 }
5264
5265 status = smb2_negotiate_context_parse(state->out_ctx,
5266 negotiate_context_blob,
5267 negotiate_context_count,
5268 state->out_ctx);
5269 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
5270 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
5271 }
5272 if (tevent_req_nterror(req, status)) {
5273 return;
5274 }
5275
5276 preauth = smb2_negotiate_context_find(
5277 state->out_ctx, SMB2_PREAUTH_INTEGRITY_CAPABILITIES);
5278 if (preauth == NULL) {
5279 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5280 return;
5281 }
5282
5283 if (preauth->data.length < 6) {
5284 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5285 return;
5286 }
5287
5288 hash_count = SVAL(preauth->data.data, 0);
5289 salt_length = SVAL(preauth->data.data, 2);
5290 hash_selected = SVAL(preauth->data.data, 4);
5291
5292 if (hash_count != 1) {
5293 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5294 return;
5295 }
5296
5297 if (preauth->data.length != (6 + salt_length)) {
5298 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5299 return;
5300 }
5301
5302 if (hash_selected != SMB2_PREAUTH_INTEGRITY_SHA512) {
5303 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5304 return;
5305 }
5306
5307 sign_algo = smb2_negotiate_context_find(
5308 state->out_ctx, SMB2_SIGNING_CAPABILITIES);
5309 if (sign_algo != NULL) {
5310 const struct smb3_signing_capabilities *client_sign_algos =
5311 &state->conn->smb2.client.smb3_capabilities.signing;
5312 bool found_selected = false;
5313 uint16_t sign_algo_count;
5314 uint16_t sign_algo_selected;
5315
5316 if (client_sign_algos->num_algos == 0) {
5317 /*
5318 * We didn't ask for SMB2_ENCRYPTION_CAPABILITIES
5319 */
5320 tevent_req_nterror(req,
5321 NT_STATUS_INVALID_NETWORK_RESPONSE);
5322 return;
5323 }
5324
5325 if (sign_algo->data.length < 2) {
5326 tevent_req_nterror(req,
5327 NT_STATUS_INVALID_NETWORK_RESPONSE);
5328 return;
5329 }
5330
5331 sign_algo_count = SVAL(sign_algo->data.data, 0);
5332 if (sign_algo_count != 1) {
5333 tevent_req_nterror(req,
5334 NT_STATUS_INVALID_NETWORK_RESPONSE);
5335 return;
5336 }
5337
5338 if (sign_algo->data.length < (2 + 2 * sign_algo_count)) {
5339 tevent_req_nterror(req,
5340 NT_STATUS_INVALID_NETWORK_RESPONSE);
5341 return;
5342 }
5343 sign_algo_selected = SVAL(sign_algo->data.data, 2);
5344
5345 for (i = 0; i < client_sign_algos->num_algos; i++) {
5346 if (client_sign_algos->algos[i] == sign_algo_selected) {
5347 /*
5348 * We found a match
5349 */
5350 found_selected = true;
5351 break;
5352 }
5353 }
5354
5355 if (!found_selected) {
5356 /*
5357 * The server send a sign_algo we didn't offer.
5358 */
5359 tevent_req_nterror(req,
5360 NT_STATUS_INVALID_NETWORK_RESPONSE);
5361 return;
5362 }
5363
5364 conn->smb2.server.sign_algo = sign_algo_selected;
5365 }
5366
5367 cipher = smb2_negotiate_context_find(
5368 state->out_ctx, SMB2_ENCRYPTION_CAPABILITIES);
5369 if (cipher != NULL) {
5370 const struct smb3_encryption_capabilities *client_ciphers =
5371 &state->conn->smb2.client.smb3_capabilities.encryption;
5372 bool found_selected = false;
5373 uint16_t cipher_count;
5374 uint16_t cipher_selected;
5375
5376 if (client_ciphers->num_algos == 0) {
5377 /*
5378 * We didn't ask for SMB2_ENCRYPTION_CAPABILITIES
5379 */
5380 tevent_req_nterror(req,
5381 NT_STATUS_INVALID_NETWORK_RESPONSE);
5382 return;
5383 }
5384
5385 if (cipher->data.length < 2) {
5386 tevent_req_nterror(req,
5387 NT_STATUS_INVALID_NETWORK_RESPONSE);
5388 return;
5389 }
5390
5391 cipher_count = SVAL(cipher->data.data, 0);
5392 if (cipher_count != 1) {
5393 tevent_req_nterror(req,
5394 NT_STATUS_INVALID_NETWORK_RESPONSE);
5395 return;
5396 }
5397
5398 if (cipher->data.length < (2 + 2 * cipher_count)) {
5399 tevent_req_nterror(req,
5400 NT_STATUS_INVALID_NETWORK_RESPONSE);
5401 return;
5402 }
5403 cipher_selected = SVAL(cipher->data.data, 2);
5404
5405 for (i = 0; i < client_ciphers->num_algos; i++) {
5406 if (cipher_selected == SMB2_ENCRYPTION_NONE) {
5407 /*
5408 * encryption not supported
5409 */
5410 found_selected = true;
5411 break;
5412 }
5413 if (client_ciphers->algos[i] == cipher_selected) {
5414 /*
5415 * We found a match
5416 */
5417 found_selected = true;
5418 break;
5419 }
5420 }
5421
5422 if (!found_selected) {
5423 /*
5424 * The server send a cipher we didn't offer.
5425 */
5426 tevent_req_nterror(req,
5427 NT_STATUS_INVALID_NETWORK_RESPONSE);
5428 return;
5429 }
5430
5431 conn->smb2.server.cipher = cipher_selected;
5432 }
5433
5434 posix = smb2_negotiate_context_find(
5435 state->out_ctx, SMB2_POSIX_EXTENSIONS_AVAILABLE);
5436 if (posix != NULL) {
5437 DATA_BLOB posix_blob = data_blob_const(
5438 SMB2_CREATE_TAG_POSIX, strlen(SMB2_CREATE_TAG_POSIX));
5439 int cmp = data_blob_cmp(&posix->data, &posix_blob);
5440
5441 conn->smb2.server.smb311_posix = (cmp == 0);
5442 }
5443
5444
5445 /* First we hash the request */
5446 smb2cli_req_get_sent_iov(subreq, sent_iov);
5447
5448 rc = gnutls_hash_init(&hash_hnd, GNUTLS_DIG_SHA512);
5449 if (rc < 0) {
5450 tevent_req_nterror(req,
5451 gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED));
5452 return;
5453 }
5454
5455 rc = gnutls_hash(hash_hnd,
5456 conn->smb2.preauth_sha512,
5457 sizeof(conn->smb2.preauth_sha512));
5458 if (rc < 0) {
5459 gnutls_hash_deinit(hash_hnd, NULL);
5460 tevent_req_nterror(req,
5461 gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED));
5462 return;
5463 }
5464 for (i = 0; i < 3; i++) {
5465 rc = gnutls_hash(hash_hnd,
5466 sent_iov[i].iov_base,
5467 sent_iov[i].iov_len);
5468 if (rc < 0) {
5469 gnutls_hash_deinit(hash_hnd, NULL);
5470 tevent_req_nterror(req,
5471 gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED));
5472 return;
5473 }
5474 }
5475
5476 /* This resets the hash state */
5477 gnutls_hash_output(hash_hnd, conn->smb2.preauth_sha512);
5478 TALLOC_FREE(subreq);
5479
5480 /* And now we hash the response */
5481 rc = gnutls_hash(hash_hnd,
5482 conn->smb2.preauth_sha512,
5483 sizeof(conn->smb2.preauth_sha512));
5484 if (rc < 0) {
5485 gnutls_hash_deinit(hash_hnd, NULL);
5486 tevent_req_nterror(req,
5487 gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED));
5488 return;
5489 }
5490 for (i = 0; i < 3; i++) {
5491 rc = gnutls_hash(hash_hnd,
5492 iov[i].iov_base,
5493 iov[i].iov_len);
5494 if (rc < 0) {
5495 gnutls_hash_deinit(hash_hnd, NULL);
5496 tevent_req_nterror(req,
5497 gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED));
5498 return;
5499 }
5500 }
5501 gnutls_hash_deinit(hash_hnd, conn->smb2.preauth_sha512);
5502 if (rc < 0) {
5503 tevent_req_nterror(req,
5504 NT_STATUS_UNSUCCESSFUL);
5505 return;
5506 }
5507
5508 status = smbXcli_negprot_smb3_check_capabilities(req);
5509 if (tevent_req_nterror(req, status)) {
5510 return;
5511 }
5512
5513 tevent_req_done(req);
5514 }
5515
5516 static NTSTATUS smbXcli_negprot_smb3_check_capabilities(struct tevent_req *req)
5517 {
5518 struct smbXcli_negprot_state *state =
5519 tevent_req_data(req,
5520 struct smbXcli_negprot_state);
5521 struct smbXcli_conn *conn = state->conn;
5522
5523 return smb311_capabilities_check(&conn->smb2.client.smb3_capabilities,
5524 "smbXcli_negprot",
5525 DBGLVL_ERR,
5526 NT_STATUS_ACCESS_DENIED,
5527 "client",
5528 conn->protocol,
5529 conn->smb2.server.sign_algo,
5530 conn->smb2.server.cipher);
5531 }
5532
5533 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
5534 TALLOC_CTX *tmp_mem,
5535 uint8_t *inbuf)
5536 {
5537 size_t num_pending = talloc_array_length(conn->pending);
5538 struct tevent_req *subreq;
5539 struct smbXcli_req_state *substate;
5540 struct tevent_req *req;
5541 uint32_t protocol_magic;
5542 size_t inbuf_len = smb_len_nbt(inbuf);
5543
5544 if (num_pending != 1) {
5545 return NT_STATUS_INTERNAL_ERROR;
5546 }
5547
5548 if (inbuf_len < 4) {
5549 return NT_STATUS_INVALID_NETWORK_RESPONSE;
5550 }
5551
5552 subreq = conn->pending[0];
5553 substate = tevent_req_data(subreq, struct smbXcli_req_state);
5554 req = tevent_req_callback_data(subreq, struct tevent_req);
5555
5556 protocol_magic = IVAL(inbuf, 4);
5557
5558 switch (protocol_magic) {
5559 case SMB_MAGIC:
5560 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
5561 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
5562 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
5563
5564 case SMB2_MAGIC:
5565 if (substate->smb2.recv_iov == NULL) {
5566 /*
5567 * For the SMB1 negprot we have move it.
5568 */
5569 substate->smb2.recv_iov = substate->smb1.recv_iov;
5570 substate->smb1.recv_iov = NULL;
5571 }
5572
5573 /*
5574 * we got an SMB2 answer, which consumed sequence number 0
5575 * so we need to use 1 as the next one.
5576 *
5577 * we also need to set the current credits to 0
5578 * as we consumed the initial one. The SMB2 answer
5579 * hopefully grant us a new credit.
5580 */
5581 conn->smb2.mid = 1;
5582 conn->smb2.cur_credits = 0;
5583 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
5584 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
5585 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
5586 }
5587
5588 DEBUG(10, ("Got non-SMB PDU\n"));
5589 return NT_STATUS_INVALID_NETWORK_RESPONSE;
5590 }
5591
5592 NTSTATUS smbXcli_negprot_recv(
5593 struct tevent_req *req,
5594 TALLOC_CTX *mem_ctx,
5595 struct smb2_negotiate_contexts **out_ctx)
5596 {
5597 struct smbXcli_negprot_state *state = tevent_req_data(
5598 req, struct smbXcli_negprot_state);
5599 NTSTATUS status;
5600
5601 if (tevent_req_is_nterror(req, &status)) {
5602 tevent_req_received(req);
5603 return status;
5604 }
5605
5606 if (out_ctx != NULL) {
5607 *out_ctx = talloc_move(mem_ctx, &state->out_ctx);
5608 }
5609
5610 tevent_req_received(req);
5611 return NT_STATUS_OK;
5612 }
5613
5614 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
5615 uint32_t timeout_msec,
5616 enum protocol_types min_protocol,
5617 enum protocol_types max_protocol,
5618 struct smb2_negotiate_contexts *in_ctx,
5619 TALLOC_CTX *mem_ctx,
5620 struct smb2_negotiate_contexts **out_ctx)
5621 {
5622 TALLOC_CTX *frame = talloc_stackframe();
5623 struct tevent_context *ev;
5624 struct tevent_req *req;
5625 NTSTATUS status = NT_STATUS_NO_MEMORY;
5626 bool ok;
5627
5628 if (smbXcli_conn_has_async_calls(conn)) {
5629 /*
5630 * Can't use sync call while an async call is in flight
5631 */
5632 status = NT_STATUS_INVALID_PARAMETER_MIX;
5633 goto fail;
5634 }
5635 ev = samba_tevent_context_init(frame);
5636 if (ev == NULL) {
5637 goto fail;
5638 }
5639 req = smbXcli_negprot_send(
5640 frame,
5641 ev,
5642 conn,
5643 timeout_msec,
5644 min_protocol,
5645 max_protocol,
5646 WINDOWS_CLIENT_PURE_SMB2_NEGPROT_INITIAL_CREDIT_ASK,
5647 in_ctx);
5648 if (req == NULL) {
5649 goto fail;
5650 }
5651 ok = tevent_req_poll_ntstatus(req, ev, &status);
5652 if (!ok) {
5653 goto fail;
5654 }
5655 status = smbXcli_negprot_recv(req, mem_ctx, out_ctx);
5656 fail:
5657 TALLOC_FREE(frame);
5658 return status;
5659 }
5660
5661 struct smb2cli_validate_negotiate_info_state {
5662 struct smbXcli_conn *conn;
5663 DATA_BLOB in_input_buffer;
5664 DATA_BLOB in_output_buffer;
5665 DATA_BLOB out_input_buffer;
5666 DATA_BLOB out_output_buffer;
5667 uint16_t dialect;
5668 };
5669
5670 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq);
5671
5672 struct tevent_req *smb2cli_validate_negotiate_info_send(TALLOC_CTX *mem_ctx,
5673 struct tevent_context *ev,
5674 struct smbXcli_conn *conn,
5675 uint32_t timeout_msec,
5676 struct smbXcli_session *session,
5677 struct smbXcli_tcon *tcon)
5678 {
5679 struct tevent_req *req;
5680 struct smb2cli_validate_negotiate_info_state *state;
5681 uint8_t *buf;
5682 uint16_t dialect_count = 0;
5683 struct tevent_req *subreq;
5684 bool _save_should_sign;
5685 size_t i;
5686
5687 req = tevent_req_create(mem_ctx, &state,
5688 struct smb2cli_validate_negotiate_info_state);
5689 if (req == NULL) {
5690 return NULL;
5691 }
5692 state->conn = conn;
5693
5694 state->in_input_buffer = data_blob_talloc_zero(state,
5695 4 + 16 + 1 + 1 + 2);
5696 if (tevent_req_nomem(state->in_input_buffer.data, req)) {
5697 return tevent_req_post(req, ev);
5698 }
5699 buf = state->in_input_buffer.data;
5700
5701 if (state->conn->max_protocol >= PROTOCOL_SMB3_00) {
5702 SIVAL(buf, 0, conn->smb2.client.capabilities);
5703 } else {
5704 SIVAL(buf, 0, 0); /* Capabilities */
5705 }
5706 if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
5707 struct GUID_ndr_buf guid_buf = { .buf = {0}, };
5708
5709 GUID_to_ndr_buf(&conn->smb2.client.guid, &guid_buf);
5710 memcpy(buf+4, guid_buf.buf, 16); /* ClientGuid */
5711 } else {
5712 memset(buf+4, 0, 16); /* ClientGuid */
5713 }
5714 if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
5715 SCVAL(buf, 20, conn->smb2.client.security_mode);
5716 } else {
5717 SCVAL(buf, 20, 0);
5718 }
5719 SCVAL(buf, 21, 0); /* reserved */
5720
5721 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
5722 bool ok;
5723 size_t ofs;
5724
5725 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
5726 continue;
5727 }
5728
5729 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
5730 continue;
5731 }
5732
5733 if (smb2cli_prots[i].proto == state->conn->protocol) {
5734 state->dialect = smb2cli_prots[i].smb2_dialect;
5735 }
5736
5737 ofs = state->in_input_buffer.length;
5738 ok = data_blob_realloc(state, &state->in_input_buffer,
5739 ofs + 2);
5740 if (!ok) {
5741 tevent_req_oom(req);
5742 return tevent_req_post(req, ev);
5743 }
5744
5745 buf = state->in_input_buffer.data;
5746 SSVAL(buf, ofs, smb2cli_prots[i].smb2_dialect);
5747
5748 dialect_count++;
5749 }
5750 buf = state->in_input_buffer.data;
5751 SSVAL(buf, 22, dialect_count);
5752
5753 _save_should_sign = smb2cli_tcon_is_signing_on(tcon);
5754 smb2cli_tcon_should_sign(tcon, true);
5755 subreq = smb2cli_ioctl_send(state, ev, conn,
5756 timeout_msec, session, tcon,
5757 UINT64_MAX, /* in_fid_persistent */
5758 UINT64_MAX, /* in_fid_volatile */
5759 FSCTL_VALIDATE_NEGOTIATE_INFO,
5760 0, /* in_max_input_length */
5761 &state->in_input_buffer,
5762 24, /* in_max_output_length */
5763 &state->in_output_buffer,
5764 SMB2_IOCTL_FLAG_IS_FSCTL);
5765 smb2cli_tcon_should_sign(tcon, _save_should_sign);
5766 if (tevent_req_nomem(subreq, req)) {
5767 return tevent_req_post(req, ev);
5768 }
5769 tevent_req_set_callback(subreq,
5770 smb2cli_validate_negotiate_info_done,
5771 req);
5772
5773 return req;
5774 }
5775
5776 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq)
5777 {
5778 struct tevent_req *req =
5779 tevent_req_callback_data(subreq,
5780 struct tevent_req);
5781 struct smb2cli_validate_negotiate_info_state *state =
5782 tevent_req_data(req,
5783 struct smb2cli_validate_negotiate_info_state);
5784 NTSTATUS status;
5785 const uint8_t *buf;
5786 uint32_t capabilities;
5787 DATA_BLOB guid_blob;
5788 struct GUID server_guid;
5789 uint16_t security_mode;
5790 uint16_t dialect;
5791
5792 status = smb2cli_ioctl_recv(subreq, state,
5793 &state->out_input_buffer,
5794 &state->out_output_buffer);
5795 TALLOC_FREE(subreq);
5796
5797 /*
5798 * This response must be signed correctly for
5799 * these "normal" error codes to be processed.
5800 * If the packet wasn't signed correctly we will get
5801 * NT_STATUS_ACCESS_DENIED or NT_STATUS_HMAC_NOT_SUPPORTED,
5802 * or NT_STATUS_INVALID_NETWORK_RESPONSE
5803 * from smb2_signing_check_pdu().
5804 *
5805 * We must never ignore the above errors here.
5806 */
5807
5808 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED)) {
5809 /*
5810 * The response was signed, but not supported
5811 *
5812 * Older Windows and Samba releases return
5813 * NT_STATUS_FILE_CLOSED.
5814 */
5815 tevent_req_done(req);
5816 return;
5817 }
5818 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_DEVICE_REQUEST)) {
5819 /*
5820 * The response was signed, but not supported
5821 *
5822 * This is returned by the NTVFS based Samba 4.x file server
5823 * for file shares.
5824 */
5825 tevent_req_done(req);
5826 return;
5827 }
5828 if (NT_STATUS_EQUAL(status, NT_STATUS_FS_DRIVER_REQUIRED)) {
5829 /*
5830 * The response was signed, but not supported
5831 *
5832 * This is returned by the NTVFS based Samba 4.x file server
5833 * for ipc shares.
5834 */
5835 tevent_req_done(req);
5836 return;
5837 }
5838 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
5839 /*
5840 * The response was signed, but not supported
5841 *
5842 * This might be returned by older Windows versions or by
5843 * NetApp SMB server implementations.
5844 *
5845 * See
5846 *
5847 * https://blogs.msdn.microsoft.com/openspecification/2012/06/28/smb3-secure-dialect-negotiation/
5848 *
5849 */
5850 tevent_req_done(req);
5851 return;
5852 }
5853 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
5854 /*
5855 * The response was signed, but not supported
5856 *
5857 * This might be returned by NetApp Ontap 7.3.7 SMB server
5858 * implementations.
5859 *
5860 * BUG: https://bugzilla.samba.org/show_bug.cgi?id=14607
5861 *
5862 */
5863 tevent_req_done(req);
5864 return;
5865 }
5866 if (tevent_req_nterror(req, status)) {
5867 return;
5868 }
5869
5870 if (state->out_output_buffer.length != 24) {
5871 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5872 return;
5873 }
5874
5875 buf = state->out_output_buffer.data;
5876
5877 capabilities = IVAL(buf, 0);
5878 guid_blob = data_blob_const(buf + 4, 16);
5879 status = GUID_from_data_blob(&guid_blob, &server_guid);
5880 if (tevent_req_nterror(req, status)) {
5881 return;
5882 }
5883 security_mode = CVAL(buf, 20);
5884 dialect = SVAL(buf, 22);
5885
5886 if (capabilities != state->conn->smb2.server.capabilities) {
5887 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5888 return;
5889 }
5890
5891 if (!GUID_equal(&server_guid, &state->conn->smb2.server.guid)) {
5892 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5893 return;
5894 }
5895
5896 if (security_mode != state->conn->smb2.server.security_mode) {
5897 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5898 return;
5899 }
5900
5901 if (dialect != state->dialect) {
5902 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5903 return;
5904 }
5905
5906 tevent_req_done(req);
5907 }
5908
5909 NTSTATUS smb2cli_validate_negotiate_info_recv(struct tevent_req *req)
5910 {
5911 return tevent_req_simple_recv_ntstatus(req);
5912 }
5913
5914 static int smbXcli_session_destructor(struct smbXcli_session *session)
5915 {
5916 if (session->conn == NULL) {
5917 return 0;
5918 }
5919
5920 DLIST_REMOVE(session->conn->sessions, session);
5921 return 0;
5922 }
5923
5924 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
5925 struct smbXcli_conn *conn)
5926 {
5927 struct smbXcli_session *session;
5928 NTSTATUS status;
5929
5930 session = talloc_zero(mem_ctx, struct smbXcli_session);
5931 if (session == NULL) {
5932 return NULL;
5933 }
5934 session->smb2 = talloc_zero(session, struct smb2cli_session);
5935 if (session->smb2 == NULL) {
5936 talloc_free(session);
5937 return NULL;
5938 }
5939 talloc_set_destructor(session, smbXcli_session_destructor);
5940
5941 status = smb2_signing_key_sign_create(session->smb2,
5942 conn->smb2.server.sign_algo,
5943 NULL, /* no master key */
5944 NULL, /* derivations */
5945 &session->smb2->signing_key);
5946 if (!NT_STATUS_IS_OK(status)) {
5947 talloc_free(session);
5948 return NULL;
5949 }
5950
5951 DLIST_ADD_END(conn->sessions, session);
5952 session->conn = conn;
5953
5954 status = smb2_signing_key_sign_create(session,
5955 conn->smb2.server.sign_algo,
5956 NULL, /* no master key */
5957 NULL, /* derivations */
5958 &session->smb2_channel.signing_key);
5959 if (!NT_STATUS_IS_OK(status)) {
5960 talloc_free(session);
5961 return NULL;
5962 }
5963
5964 memcpy(session->smb2_channel.preauth_sha512,
5965 conn->smb2.preauth_sha512,
5966 sizeof(session->smb2_channel.preauth_sha512));
5967
5968 return session;
5969 }
5970
5971 struct smbXcli_session *smbXcli_session_shallow_copy(TALLOC_CTX *mem_ctx,
5972 struct smbXcli_session *src)
5973 {
5974 struct smbXcli_session *session;
5975 struct timespec ts;
5976 NTTIME nt;
5977
5978 session = talloc_zero(mem_ctx, struct smbXcli_session);
5979 if (session == NULL) {
5980 return NULL;
5981 }
5982 session->smb2 = talloc_zero(session, struct smb2cli_session);
5983 if (session->smb2 == NULL) {
5984 talloc_free(session);
5985 return NULL;
5986 }
5987
5988 /*
5989 * Note we keep a pointer to the session keys of the
5990 * main session and rely on the caller to free the
5991 * shallow copy first!
5992 */
5993 session->conn = src->conn;
5994 *session->smb2 = *src->smb2;
5995 session->smb2_channel = src->smb2_channel;
5996 session->disconnect_expired = src->disconnect_expired;
5997
5998 /*
5999 * This is only supposed to be called in test code
6000 * but we should not reuse nonces!
6001 *
6002 * Add the current timestamp as NTTIME to nonce_high
6003 * and set nonce_low to a value we can recognize in captures.
6004 */
6005 clock_gettime_mono(&ts);
6006 nt = unix_timespec_to_nt_time(ts);
6007 nt &= session->smb2->nonce_high_max;
6008 if (nt == session->smb2->nonce_high_max || nt < UINT8_MAX) {
6009 talloc_free(session);
6010 return NULL;
6011 }
6012 session->smb2->nonce_high += nt;
6013 session->smb2->nonce_low = UINT32_MAX;
6014
6015 DLIST_ADD_END(src->conn->sessions, session);
6016 talloc_set_destructor(session, smbXcli_session_destructor);
6017
6018 return session;
6019 }
6020
6021 bool smbXcli_session_is_guest(struct smbXcli_session *session)
6022 {
6023 if (session == NULL) {
6024 return false;
6025 }
6026
6027 if (session->conn == NULL) {
6028 return false;
6029 }
6030
6031 if (session->conn->mandatory_signing) {
6032 return false;
6033 }
6034
6035 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
6036 if (session->smb2->session_flags & SMB2_SESSION_FLAG_IS_GUEST) {
6037 return true;
6038 }
6039 return false;
6040 }
6041
6042 if (session->smb1.action & SMB_SETUP_GUEST) {
6043 return true;
6044 }
6045
6046 return false;
6047 }
6048
6049 bool smbXcli_session_is_authenticated(struct smbXcli_session *session)
6050 {
6051 const DATA_BLOB *application_key;
6052
6053 if (session == NULL) {
6054 return false;
6055 }
6056
6057 if (session->conn == NULL) {
6058 return false;
6059 }
6060
6061 /*
6062 * If we have an application key we had a session key negotiated
6063 * at auth time.
6064 */
6065 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
6066 if (!smb2_signing_key_valid(session->smb2->application_key)) {
6067 return false;
6068 }
6069 application_key = &session->smb2->application_key->blob;
6070 } else {
6071 application_key = &session->smb1.application_key;
6072 }
6073
6074 if (application_key->length == 0) {
6075 return false;
6076 }
6077
6078 return true;
6079 }
6080
6081 NTSTATUS smb2cli_session_signing_key(struct smbXcli_session *session,
6082 TALLOC_CTX *mem_ctx,
6083 DATA_BLOB *key)
6084 {
6085 const struct smb2_signing_key *sig = NULL;
6086
6087 if (session->conn == NULL) {
6088 return NT_STATUS_NO_USER_SESSION_KEY;
6089 }
6090
6091 /*
6092 * Use channel signing key if there is one, otherwise fallback
6093 * to session.
6094 */
6095
6096 if (smb2_signing_key_valid(session->smb2_channel.signing_key)) {
6097 sig = session->smb2_channel.signing_key;
6098 } else if (smb2_signing_key_valid(session->smb2->signing_key)) {
6099 sig = session->smb2->signing_key;
6100 } else {
6101 return NT_STATUS_NO_USER_SESSION_KEY;
6102 }
6103
6104 *key = data_blob_dup_talloc(mem_ctx, sig->blob);
6105 if (key->data == NULL) {
6106 return NT_STATUS_NO_MEMORY;
6107 }
6108
6109 return NT_STATUS_OK;
6110 }
6111
6112 NTSTATUS smb2cli_session_encryption_key(struct smbXcli_session *session,
6113 TALLOC_CTX *mem_ctx,
6114 DATA_BLOB *key)
6115 {
6116 if (session->conn == NULL) {
6117 return NT_STATUS_NO_USER_SESSION_KEY;
6118 }
6119
6120 if (session->conn->protocol < PROTOCOL_SMB3_00) {
6121 return NT_STATUS_NO_USER_SESSION_KEY;
6122 }
6123
6124 if (!smb2_signing_key_valid(session->smb2->encryption_key)) {
6125 return NT_STATUS_NO_USER_SESSION_KEY;
6126 }
6127
6128 *key = data_blob_dup_talloc(mem_ctx, session->smb2->encryption_key->blob);
6129 if (key->data == NULL) {
6130 return NT_STATUS_NO_MEMORY;
6131 }
6132
6133 return NT_STATUS_OK;
6134 }
6135
6136 NTSTATUS smb2cli_session_decryption_key(struct smbXcli_session *session,
6137 TALLOC_CTX *mem_ctx,
6138 DATA_BLOB *key)
6139 {
6140 if (session->conn == NULL) {
6141 return NT_STATUS_NO_USER_SESSION_KEY;
6142 }
6143
6144 if (session->conn->protocol < PROTOCOL_SMB3_00) {
6145 return NT_STATUS_NO_USER_SESSION_KEY;
6146 }
6147
6148 if (!smb2_signing_key_valid(session->smb2->decryption_key)) {
6149 return NT_STATUS_NO_USER_SESSION_KEY;
6150 }
6151
6152 *key = data_blob_dup_talloc(mem_ctx, session->smb2->decryption_key->blob);
6153 if (key->data == NULL) {
6154 return NT_STATUS_NO_MEMORY;
6155 }
6156
6157 return NT_STATUS_OK;
6158 }
6159
6160 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
6161 TALLOC_CTX *mem_ctx,
6162 DATA_BLOB *key)
6163 {
6164 const DATA_BLOB *application_key;
6165
6166 *key = data_blob_null;
6167
6168 if (session->conn == NULL) {
6169 return NT_STATUS_NO_USER_SESSION_KEY;
6170 }
6171
6172 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
6173 if (!smb2_signing_key_valid(session->smb2->application_key)) {
6174 return NT_STATUS_NO_USER_SESSION_KEY;
6175 }
6176 application_key = &session->smb2->application_key->blob;
6177 } else {
6178 application_key = &session->smb1.application_key;
6179 }
6180
6181 if (application_key->length == 0) {
6182 return NT_STATUS_NO_USER_SESSION_KEY;
6183 }
6184
6185 *key = data_blob_dup_talloc(mem_ctx, *application_key);
6186 if (key->data == NULL) {
6187 return NT_STATUS_NO_MEMORY;
6188 }
6189
6190 return NT_STATUS_OK;
6191 }
6192
6193 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
6194 {
6195 session->disconnect_expired = true;
6196 }
6197
6198 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
6199 {
6200 return session->smb1.session_id;
6201 }
6202
6203 void smb1cli_session_set_id(struct smbXcli_session *session,
6204 uint16_t session_id)
6205 {
6206 session->smb1.session_id = session_id;
6207 }
6208
6209 void smb1cli_session_set_action(struct smbXcli_session *session,
6210 uint16_t action)
6211 {
6212 session->smb1.action = action;
6213 }
6214
6215 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
6216 const DATA_BLOB _session_key)
6217 {
6218 struct smbXcli_conn *conn = session->conn;
6219 uint8_t session_key[16];
6220
6221 if (conn == NULL) {
6222 return NT_STATUS_INVALID_PARAMETER_MIX;
6223 }
6224
6225 if (session->smb1.application_key.length != 0) {
6226 /*
6227 * TODO: do not allow this...
6228 *
6229 * return NT_STATUS_INVALID_PARAMETER_MIX;
6230 */
6231 data_blob_clear_free(&session->smb1.application_key);
6232 session->smb1.protected_key = false;
6233 }
6234
6235 if (_session_key.length == 0) {
6236 return NT_STATUS_OK;
6237 }
6238
6239 ZERO_STRUCT(session_key);
6240 memcpy(session_key, _session_key.data,
6241 MIN(_session_key.length, sizeof(session_key)));
6242
6243 session->smb1.application_key = data_blob_talloc(session,
6244 session_key,
6245 sizeof(session_key));
6246 ZERO_STRUCT(session_key);
6247 if (session->smb1.application_key.data == NULL) {
6248 return NT_STATUS_NO_MEMORY;
6249 }
6250
6251 session->smb1.protected_key = false;
6252
6253 return NT_STATUS_OK;
6254 }
6255
6256 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
6257 {
6258 NTSTATUS status;
6259
6260 if (session->smb1.protected_key) {
6261 /* already protected */
6262 return NT_STATUS_OK;
6263 }
6264
6265 if (session->smb1.application_key.length != 16) {
6266 return NT_STATUS_INVALID_PARAMETER_MIX;
6267 }
6268
6269 status = smb1_key_derivation(session->smb1.application_key.data,
6270 session->smb1.application_key.length,
6271 session->smb1.application_key.data);
6272 if (!NT_STATUS_IS_OK(status)) {
6273 return status;
6274 }
6275
6276 session->smb1.protected_key = true;
6277
6278 return NT_STATUS_OK;
6279 }
6280
6281 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
6282 {
6283 struct smbXcli_conn *conn = session->conn;
6284 uint8_t security_mode = 0;
6285
6286 if (conn == NULL) {
6287 return security_mode;
6288 }
6289
6290 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
6291 if (conn->mandatory_signing) {
6292 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
6293 }
6294 if (session->smb2->should_sign) {
6295 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
6296 }
6297
6298 return security_mode;
6299 }
6300
6301 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
6302 {
6303 return session->smb2->session_id;
6304 }
6305
6306 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
6307 {
6308 return session->smb2->session_flags;
6309 }
6310
6311 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
6312 uint64_t session_id,
6313 uint16_t session_flags)
6314 {
6315 session->smb2->session_id = session_id;
6316 session->smb2->session_flags = session_flags;
6317 }
6318
6319 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
6320 {
6321 session->smb2->channel_sequence += 1;
6322 }
6323
6324 uint16_t smb2cli_session_reset_channel_sequence(struct smbXcli_session *session,
6325 uint16_t channel_sequence)
6326 {
6327 uint16_t prev_cs;
6328
6329 prev_cs = session->smb2->channel_sequence;
6330 session->smb2->channel_sequence = channel_sequence;
6331
6332 return prev_cs;
6333 }
6334
6335 uint16_t smb2cli_session_current_channel_sequence(struct smbXcli_session *session)
6336 {
6337 return session->smb2->channel_sequence;
6338 }
6339
6340 void smb2cli_session_start_replay(struct smbXcli_session *session)
6341 {
6342 session->smb2->replay_active = true;
6343 }
6344
6345 void smb2cli_session_stop_replay(struct smbXcli_session *session)
6346 {
6347 session->smb2->replay_active = false;
6348 }
6349
6350 void smb2cli_session_require_signed_response(struct smbXcli_session *session,
6351 bool require_signed_response)
6352 {
6353 session->smb2->require_signed_response = require_signed_response;
6354 }
6355
6356 void smb2cli_session_torture_anonymous_signing(struct smbXcli_session *session,
6357 bool anonymous_signing)
6358 {
6359 session->smb2->anonymous_signing = anonymous_signing;
6360 }
6361
6362 void smb2cli_session_torture_anonymous_encryption(struct smbXcli_session *session,
6363 bool anonymous_encryption)
6364 {
6365 session->smb2->anonymous_encryption = anonymous_encryption;
6366 }
6367
6368 void smb2cli_session_torture_no_signing_disconnect(struct smbXcli_session *session)
6369 {
6370 session->smb2->no_signing_disconnect = true;
6371 }
6372
6373 NTSTATUS smb2cli_session_update_preauth(struct smbXcli_session *session,
6374 const struct iovec *iov)
6375 {
6376 gnutls_hash_hd_t hash_hnd = NULL;
6377 size_t i;
6378 int rc;
6379
6380 if (session->conn == NULL) {
6381 return NT_STATUS_INTERNAL_ERROR;
6382 }
6383
6384 if (session->conn->protocol < PROTOCOL_SMB3_11) {
6385 return NT_STATUS_OK;
6386 }
6387
6388 if (smb2_signing_key_valid(session->smb2_channel.signing_key)) {
6389 return NT_STATUS_OK;
6390 }
6391
6392 rc = gnutls_hash_init(&hash_hnd,
6393 GNUTLS_DIG_SHA512);
6394 if (rc < 0) {
6395 return gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED);
6396 }
6397
6398 rc = gnutls_hash(hash_hnd,
6399 session->smb2_channel.preauth_sha512,
6400 sizeof(session->smb2_channel.preauth_sha512));
6401 if (rc < 0) {
6402 gnutls_hash_deinit(hash_hnd, NULL);
6403 return gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED);
6404 }
6405 for (i = 0; i < 3; i++) {
6406 rc = gnutls_hash(hash_hnd,
6407 iov[i].iov_base,
6408 iov[i].iov_len);
6409 if (rc < 0) {
6410 gnutls_hash_deinit(hash_hnd, NULL);
6411 return gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED);
6412 }
6413 }
6414 gnutls_hash_deinit(hash_hnd, session->smb2_channel.preauth_sha512);
6415
6416 return NT_STATUS_OK;
6417 }
6418
6419 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
6420 const DATA_BLOB _session_key,
6421 const struct iovec *recv_iov)
6422 {
6423 struct smbXcli_conn *conn = session->conn;
6424 uint16_t no_sign_flags = 0;
6425 bool check_signature = true;
6426 uint32_t hdr_flags;
6427 NTSTATUS status;
6428 struct smb2_signing_derivations derivations = {
6429 .signing = NULL,
6430 };
6431 DATA_BLOB preauth_hash = data_blob_null;
6432 size_t nonce_size = 0;
6433
6434 if (conn == NULL) {
6435 return NT_STATUS_INVALID_PARAMETER_MIX;
6436 }
6437
6438 if (recv_iov[0].iov_len != SMB2_HDR_BODY) {
6439 return NT_STATUS_INVALID_PARAMETER_MIX;
6440 }
6441
6442 if (!conn->mandatory_signing) {
6443 /*
6444 * only allow guest sessions without
6445 * mandatory signing.
6446 *
6447 * If we try an authentication with username != ""
6448 * and the server let us in without verifying the
6449 * password we don't have a negotiated session key
6450 * for signing.
6451 */
6452 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST;
6453 }
6454
6455 if (session->smb2->session_flags & no_sign_flags) {
6456 session->smb2->should_sign = false;
6457 return NT_STATUS_OK;
6458 }
6459
6460 if (smb2_signing_key_valid(session->smb2->signing_key)) {
6461 return NT_STATUS_INVALID_PARAMETER_MIX;
6462 }
6463
6464 if (conn->protocol >= PROTOCOL_SMB3_11) {
6465 preauth_hash = data_blob_const(session->smb2_channel.preauth_sha512,
6466 sizeof(session->smb2_channel.preauth_sha512));
6467 }
6468
6469 smb2_signing_derivations_fill_const_stack(&derivations,
6470 conn->protocol,
6471 preauth_hash);
6472
6473 if (session->smb2->anonymous_encryption) {
6474 goto skip_signing_key;
6475 }
6476
6477 status = smb2_signing_key_sign_create(session->smb2,
6478 conn->smb2.server.sign_algo,
6479 &_session_key,
6480 derivations.signing,
6481 &session->smb2->signing_key);
6482 if (!NT_STATUS_IS_OK(status)) {
6483 return status;
6484 }
6485
6486 if (session->smb2->anonymous_signing) {
6487 /*
6488 * skip encryption and application keys
6489 */
6490 goto skip_application_key;
6491 }
6492
6493 skip_signing_key:
6494
6495 status = smb2_signing_key_cipher_create(session->smb2,
6496 conn->smb2.server.cipher,
6497 &_session_key,
6498 derivations.cipher_c2s,
6499 &session->smb2->encryption_key);
6500 if (!NT_STATUS_IS_OK(status)) {
6501 return status;
6502 }
6503
6504 status = smb2_signing_key_cipher_create(session->smb2,
6505 conn->smb2.server.cipher,
6506 &_session_key,
6507 derivations.cipher_s2c,
6508 &session->smb2->decryption_key);
6509 if (!NT_STATUS_IS_OK(status)) {
6510 return status;
6511 }
6512
6513 if (session->smb2->anonymous_encryption) {
6514 goto skip_application_key;
6515 }
6516
6517 status = smb2_signing_key_sign_create(session->smb2,
6518 conn->smb2.server.sign_algo,
6519 &_session_key,
6520 derivations.application,
6521 &session->smb2->application_key);
6522 if (!NT_STATUS_IS_OK(status)) {
6523 return status;
6524 }
6525
6526 skip_application_key:
6527
6528 status = smb2_signing_key_copy(session,
6529 session->smb2->signing_key,
6530 &session->smb2_channel.signing_key);
6531 if (!NT_STATUS_IS_OK(status)) {
6532 return status;
6533 }
6534
6535 check_signature = conn->mandatory_signing;
6536
6537 if (conn->protocol >= PROTOCOL_SMB3_11) {
6538 check_signature = true;
6539 }
6540
6541 if (session->smb2->anonymous_signing) {
6542 check_signature = false;
6543 }
6544
6545 if (session->smb2->anonymous_encryption) {
6546 check_signature = false;
6547 }
6548
6549 hdr_flags = IVAL(recv_iov[0].iov_base, SMB2_HDR_FLAGS);
6550 if (hdr_flags & SMB2_HDR_FLAG_SIGNED) {
6551 /*
6552 * Sadly some vendors don't sign the
6553 * final SMB2 session setup response
6554 *
6555 * At least Windows and Samba are always doing this
6556 * if there's a session key available.
6557 *
6558 * We only check the signature if it's mandatory
6559 * or SMB2_HDR_FLAG_SIGNED is provided.
6560 */
6561 check_signature = true;
6562 }
6563
6564 if (check_signature) {
6565 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
6566 recv_iov, 3);
6567 if (!NT_STATUS_IS_OK(status)) {
6568 return status;
6569 }
6570 }
6571
6572 session->smb2->should_sign = false;
6573 session->smb2->should_encrypt = false;
6574
6575 if (conn->desire_signing) {
6576 session->smb2->should_sign = true;
6577 }
6578
6579 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
6580 session->smb2->should_sign = true;
6581 }
6582
6583 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
6584 session->smb2->should_encrypt = true;
6585 }
6586
6587 if (conn->protocol < PROTOCOL_SMB3_00) {
6588 session->smb2->should_encrypt = false;
6589 }
6590
6591 if (conn->smb2.server.cipher == 0) {
6592 session->smb2->should_encrypt = false;
6593 }
6594
6595 if (session->smb2->anonymous_signing) {
6596 session->smb2->should_sign = true;
6597 }
6598
6599 if (session->smb2->anonymous_encryption) {
6600 session->smb2->should_encrypt = true;
6601 session->smb2->should_sign = false;
6602 }
6603
6604 /*
6605 * CCM and GCM algorithms must never have their
6606 * nonce wrap, or the security of the whole
6607 * communication and the keys is destroyed.
6608 * We must drop the connection once we have
6609 * transferred too much data.
6610 *
6611 * NOTE: We assume nonces greater than 8 bytes.
6612 */
6613 generate_nonce_buffer((uint8_t *)&session->smb2->nonce_high_random,
6614 sizeof(session->smb2->nonce_high_random));
6615 switch (conn->smb2.server.cipher) {
6616 case SMB2_ENCRYPTION_AES128_CCM:
6617 nonce_size = SMB2_AES_128_CCM_NONCE_SIZE;
6618 break;
6619 case SMB2_ENCRYPTION_AES128_GCM:
6620 nonce_size = gnutls_cipher_get_iv_size(GNUTLS_CIPHER_AES_128_GCM);
6621 break;
6622 case SMB2_ENCRYPTION_AES256_CCM:
6623 nonce_size = SMB2_AES_128_CCM_NONCE_SIZE;
6624 break;
6625 case SMB2_ENCRYPTION_AES256_GCM:
6626 nonce_size = gnutls_cipher_get_iv_size(GNUTLS_CIPHER_AES_256_GCM);
6627 break;
6628 default:
6629 nonce_size = 0;
6630 break;
6631 }
6632 session->smb2->nonce_high_max = SMB2_NONCE_HIGH_MAX(nonce_size);
6633 session->smb2->nonce_high = 0;
6634 session->smb2->nonce_low = 0;
6635
6636 return NT_STATUS_OK;
6637 }
6638
6639 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
6640 struct smbXcli_session *session1,
6641 struct smbXcli_conn *conn,
6642 struct smbXcli_session **_session2)
6643 {
6644 struct smbXcli_session *session2;
6645 NTSTATUS status;
6646
6647 if (!smb2_signing_key_valid(session1->smb2->signing_key)) {
6648 return NT_STATUS_INVALID_PARAMETER_MIX;
6649 }
6650
6651 if (conn == NULL) {
6652 return NT_STATUS_INVALID_PARAMETER_MIX;
6653 }
6654
6655 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
6656 if (session2 == NULL) {
6657 return NT_STATUS_NO_MEMORY;
6658 }
6659 session2->smb2 = talloc_reference(session2, session1->smb2);
6660 if (session2->smb2 == NULL) {
6661 talloc_free(session2);
6662 return NT_STATUS_NO_MEMORY;
6663 }
6664
6665 talloc_set_destructor(session2, smbXcli_session_destructor);
6666 DLIST_ADD_END(conn->sessions, session2);
6667 session2->conn = conn;
6668
6669 status = smb2_signing_key_sign_create(session2,
6670 conn->smb2.server.sign_algo,
6671 NULL, /* no master key */
6672 NULL, /* derivations */
6673 &session2->smb2_channel.signing_key);
6674 if (!NT_STATUS_IS_OK(status)) {
6675 talloc_free(session2);
6676 return NT_STATUS_NO_MEMORY;
6677 }
6678
6679 memcpy(session2->smb2_channel.preauth_sha512,
6680 conn->smb2.preauth_sha512,
6681 sizeof(session2->smb2_channel.preauth_sha512));
6682
6683 *_session2 = session2;
6684 return NT_STATUS_OK;
6685 }
6686
6687 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
6688 const DATA_BLOB _channel_key,
6689 const struct iovec *recv_iov)
6690 {
6691 struct smbXcli_conn *conn = session->conn;
6692 uint8_t channel_key[16];
6693 NTSTATUS status;
6694 struct _derivation {
6695 DATA_BLOB label;
6696 DATA_BLOB context;
6697 };
6698 struct {
6699 struct _derivation signing;
6700 } derivation = {
6701 .signing.label.length = 0,
6702 };
6703
6704 if (conn == NULL) {
6705 return NT_STATUS_INVALID_PARAMETER_MIX;
6706 }
6707
6708 if (smb2_signing_key_valid(session->smb2_channel.signing_key)) {
6709 return NT_STATUS_INVALID_PARAMETER_MIX;
6710 }
6711
6712 if (conn->protocol >= PROTOCOL_SMB3_11) {
6713 struct _derivation *d;
6714 DATA_BLOB p;
6715
6716 p = data_blob_const(session->smb2_channel.preauth_sha512,
6717 sizeof(session->smb2_channel.preauth_sha512));
6718
6719 d = &derivation.signing;
6720 d->label = data_blob_string_const_null("SMBSigningKey");
6721 d->context = p;
6722 } else if (conn->protocol >= PROTOCOL_SMB3_00) {
6723 struct _derivation *d;
6724
6725 d = &derivation.signing;
6726 d->label = data_blob_string_const_null("SMB2AESCMAC");
6727 d->context = data_blob_string_const_null("SmbSign");
6728 }
6729
6730 ZERO_STRUCT(channel_key);
6731 memcpy(channel_key, _channel_key.data,
6732 MIN(_channel_key.length, sizeof(channel_key)));
6733
6734 session->smb2_channel.signing_key->blob =
6735 data_blob_talloc(session->smb2_channel.signing_key,
6736 channel_key,
6737 sizeof(channel_key));
6738 if (!smb2_signing_key_valid(session->smb2_channel.signing_key)) {
6739 ZERO_STRUCT(channel_key);
6740 return NT_STATUS_NO_MEMORY;
6741 }
6742
6743 if (conn->protocol >= PROTOCOL_SMB3_00) {
6744 struct _derivation *d = &derivation.signing;
6745
6746 status = samba_gnutls_sp800_108_derive_key(
6747 channel_key,
6748 sizeof(channel_key),
6749 NULL,
6750 0,
6751 d->label.data,
6752 d->label.length,
6753 d->context.data,
6754 d->context.length,
6755 GNUTLS_MAC_SHA256,
6756 session->smb2_channel.signing_key->blob.data,
6757 session->smb2_channel.signing_key->blob.length);
6758 if (!NT_STATUS_IS_OK(status)) {
6759 return status;
6760 }
6761 }
6762 ZERO_STRUCT(channel_key);
6763
6764 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
6765 recv_iov, 3);
6766 if (!NT_STATUS_IS_OK(status)) {
6767 return status;
6768 }
6769
6770 return NT_STATUS_OK;
6771 }
6772
6773 NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
6774 {
6775 if (session->smb2->anonymous_signing) {
6776 return NT_STATUS_INVALID_PARAMETER_MIX;
6777 }
6778
6779 if (session->smb2->anonymous_encryption) {
6780 SMB_ASSERT(session->smb2->should_encrypt);
6781 SMB_ASSERT(!session->smb2->should_sign);
6782 return NT_STATUS_OK;
6783 }
6784
6785 if (!session->smb2->should_sign) {
6786 /*
6787 * We need required signing on the session
6788 * in order to prevent man in the middle attacks.
6789 */
6790 return NT_STATUS_INVALID_PARAMETER_MIX;
6791 }
6792
6793 if (session->smb2->should_encrypt) {
6794 return NT_STATUS_OK;
6795 }
6796
6797 if (session->conn->protocol < PROTOCOL_SMB3_00) {
6798 return NT_STATUS_NOT_SUPPORTED;
6799 }
6800
6801 if (session->conn->smb2.server.cipher == 0) {
6802 return NT_STATUS_NOT_SUPPORTED;
6803 }
6804
6805 if (!smb2_signing_key_valid(session->smb2->signing_key)) {
6806 return NT_STATUS_NOT_SUPPORTED;
6807 }
6808 session->smb2->should_encrypt = true;
6809 return NT_STATUS_OK;
6810 }
6811
6812 uint16_t smb2cli_session_get_encryption_cipher(struct smbXcli_session *session)
6813 {
6814 if (session->conn->protocol < PROTOCOL_SMB3_00) {
6815 return 0;
6816 }
6817
6818 if (!session->smb2->should_encrypt) {
6819 return 0;
6820 }
6821
6822 return session->conn->smb2.server.cipher;
6823 }
6824
6825 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
6826 {
6827 struct smbXcli_tcon *tcon;
6828
6829 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
6830 if (tcon == NULL) {
6831 return NULL;
6832 }
6833
6834 return tcon;
6835 }
6836
6837 /*
6838 * Return a deep structure copy of a struct smbXcli_tcon *
6839 */
6840
6841 struct smbXcli_tcon *smbXcli_tcon_copy(TALLOC_CTX *mem_ctx,
6842 const struct smbXcli_tcon *tcon_in)
6843 {
6844 struct smbXcli_tcon *tcon;
6845
6846 tcon = talloc_memdup(mem_ctx, tcon_in, sizeof(struct smbXcli_tcon));
6847 if (tcon == NULL) {
6848 return NULL;
6849 }
6850
6851 /* Deal with the SMB1 strings. */
6852 if (tcon_in->smb1.service != NULL) {
6853 tcon->smb1.service = talloc_strdup(tcon, tcon_in->smb1.service);
6854 if (tcon->smb1.service == NULL) {
6855 TALLOC_FREE(tcon);
6856 return NULL;
6857 }
6858 }
6859 if (tcon->smb1.fs_type != NULL) {
6860 tcon->smb1.fs_type = talloc_strdup(tcon, tcon_in->smb1.fs_type);
6861 if (tcon->smb1.fs_type == NULL) {
6862 TALLOC_FREE(tcon);
6863 return NULL;
6864 }
6865 }
6866 return tcon;
6867 }
6868
6869 void smbXcli_tcon_set_fs_attributes(struct smbXcli_tcon *tcon,
6870 uint32_t fs_attributes)
6871 {
6872 tcon->fs_attributes = fs_attributes;
6873 }
6874
6875 uint32_t smbXcli_tcon_get_fs_attributes(struct smbXcli_tcon *tcon)
6876 {
6877 return tcon->fs_attributes;
6878 }
6879
6880 bool smbXcli_tcon_is_dfs_share(struct smbXcli_tcon *tcon)
6881 {
6882 if (tcon == NULL) {
6883 return false;
6884 }
6885
6886 if (tcon->is_smb1) {
6887 if (tcon->smb1.optional_support & SMB_SHARE_IN_DFS) {
6888 return true;
6889 }
6890
6891 return false;
6892 }
6893
6894 if (tcon->smb2.capabilities & SMB2_SHARE_CAP_DFS) {
6895 return true;
6896 }
6897
6898 return false;
6899 }
6900
6901 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
6902 {
6903 return tcon->smb1.tcon_id;
6904 }
6905
6906 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
6907 {
6908 tcon->is_smb1 = true;
6909 tcon->smb1.tcon_id = tcon_id;
6910 }
6911
6912 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
6913 uint16_t tcon_id,
6914 uint16_t optional_support,
6915 uint32_t maximal_access,
6916 uint32_t guest_maximal_access,
6917 const char *service,
6918 const char *fs_type)
6919 {
6920 tcon->is_smb1 = true;
6921 tcon->fs_attributes = 0;
6922 tcon->smb1.tcon_id = tcon_id;
6923 tcon->smb1.optional_support = optional_support;
6924 tcon->smb1.maximal_access = maximal_access;
6925 tcon->smb1.guest_maximal_access = guest_maximal_access;
6926
6927 TALLOC_FREE(tcon->smb1.service);
6928 tcon->smb1.service = talloc_strdup(tcon, service);
6929 if (service != NULL && tcon->smb1.service == NULL) {
6930 return false;
6931 }
6932
6933 TALLOC_FREE(tcon->smb1.fs_type);
6934 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
6935 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
6936 return false;
6937 }
6938
6939 return true;
6940 }
6941
6942 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
6943 {
6944 return tcon->smb2.tcon_id;
6945 }
6946
6947 void smb2cli_tcon_set_id(struct smbXcli_tcon *tcon, uint32_t tcon_id)
6948 {
6949 tcon->smb2.tcon_id = tcon_id;
6950 }
6951
6952 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
6953 {
6954 return tcon->smb2.capabilities;
6955 }
6956
6957 uint32_t smb2cli_tcon_flags(struct smbXcli_tcon *tcon)
6958 {
6959 return tcon->smb2.flags;
6960 }
6961
6962 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
6963 struct smbXcli_session *session,
6964 uint32_t tcon_id,
6965 uint8_t type,
6966 uint32_t flags,
6967 uint32_t capabilities,
6968 uint32_t maximal_access)
6969 {
6970 tcon->is_smb1 = false;
6971 tcon->fs_attributes = 0;
6972 tcon->smb2.tcon_id = tcon_id;
6973 tcon->smb2.type = type;
6974 tcon->smb2.flags = flags;
6975 tcon->smb2.capabilities = capabilities;
6976 tcon->smb2.maximal_access = maximal_access;
6977
6978 tcon->smb2.should_sign = false;
6979 tcon->smb2.should_encrypt = false;
6980
6981 if (session == NULL) {
6982 return;
6983 }
6984
6985 tcon->smb2.should_sign = session->smb2->should_sign;
6986 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
6987
6988 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
6989 tcon->smb2.should_encrypt = true;
6990 }
6991 }
6992
6993 void smb2cli_tcon_should_sign(struct smbXcli_tcon *tcon,
6994 bool should_sign)
6995 {
6996 tcon->smb2.should_sign = should_sign;
6997 }
6998
6999 bool smb2cli_tcon_is_signing_on(struct smbXcli_tcon *tcon)
7000 {
7001 if (tcon->smb2.should_encrypt) {
7002 return true;
7003 }
7004
7005 return tcon->smb2.should_sign;
7006 }
7007
7008 void smb2cli_tcon_should_encrypt(struct smbXcli_tcon *tcon,
7009 bool should_encrypt)
7010 {
7011 tcon->smb2.should_encrypt = should_encrypt;
7012 }
7013
7014 bool smb2cli_tcon_is_encryption_on(struct smbXcli_tcon *tcon)
7015 {
7016 return tcon->smb2.should_encrypt;
7017 }
7018
7019 void smb2cli_conn_set_mid(struct smbXcli_conn *conn, uint64_t mid)
7020 {
7021 conn->smb2.mid = mid;
7022 }
7023
7024 uint64_t smb2cli_conn_get_mid(struct smbXcli_conn *conn)
7025 {
7026 return conn->smb2.mid;
7027 }
7028
7029 NTSTATUS smb2cli_parse_dyn_buffer(uint32_t dyn_offset,
7030 const DATA_BLOB dyn_buffer,
7031 uint32_t min_offset,
7032 uint32_t buffer_offset,
7033 uint32_t buffer_length,
7034 uint32_t max_length,
7035 uint32_t *next_offset,
7036 DATA_BLOB *buffer)
7037 {
7038 uint32_t offset;
7039 bool oob;
7040
7041 *buffer = data_blob_null;
7042 *next_offset = dyn_offset;
7043
7044 if (buffer_offset == 0) {
7045 /*
7046 * If the offset is 0, we better ignore
7047 * the buffer_length field.
7048 */
7049 return NT_STATUS_OK;
7050 }
7051
7052 if (buffer_length == 0) {
7053 /*
7054 * If the length is 0, we better ignore
7055 * the buffer_offset field.
7056 */
7057 return NT_STATUS_OK;
7058 }
7059
7060 if ((buffer_offset % 8) != 0) {
7061 /*
7062 * The offset needs to be 8 byte aligned.
7063 */
7064 return NT_STATUS_INVALID_NETWORK_RESPONSE;
7065 }
7066
7067 /*
7068 * We used to enforce buffer_offset to be
7069 * an exact match of the expected minimum,
7070 * but the NetApp Ontap 7.3.7 SMB server
7071 * gets the padding wrong and aligns the
7072 * input_buffer_offset by a value of 8.
7073 *
7074 * So we just enforce that the offset is
7075 * not lower than the expected value.
7076 */
7077 SMB_ASSERT(min_offset >= dyn_offset);
7078 if (buffer_offset < min_offset) {
7079 return NT_STATUS_INVALID_NETWORK_RESPONSE;
7080 }
7081
7082 /*
7083 * Make [input|output]_buffer_offset relative to "dyn_buffer"
7084 */
7085 offset = buffer_offset - dyn_offset;
7086 oob = smb_buffer_oob(dyn_buffer.length, offset, buffer_length);
7087 if (oob) {
7088 return NT_STATUS_INVALID_NETWORK_RESPONSE;
7089 }
7090
7091 /*
7092 * Give the caller a hint what we consumed,
7093 * the caller may need to add possible padding.
7094 */
7095 *next_offset = buffer_offset + buffer_length;
7096
7097 if (max_length == 0) {
7098 /*
7099 * If max_input_length is 0 we ignore the
7100 * input_buffer_length, because Windows 2008 echos the
7101 * DCERPC request from the requested input_buffer to
7102 * the response input_buffer.
7103 *
7104 * We just use the same logic also for max_output_length...
7105 */
7106 buffer_length = 0;
7107 }
7108
7109 if (buffer_length > max_length) {
7110 return NT_STATUS_INVALID_NETWORK_RESPONSE;
7111 }
7112
7113 *buffer = (DATA_BLOB) {
7114 .data = dyn_buffer.data + offset,
7115 .length = buffer_length,
7116 };
7117 return NT_STATUS_OK;
7118 }
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