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s3:utils/smbfilter: use a local variable for the packet buffer
[Samba.git] / libcli / smb / smbXcli_base.c
blob25fbabd00d03f0b4f57b2ee1fdbba6760475b5a1
1 /*
2 Unix SMB/CIFS implementation.
3 Infrastructure for async SMB client requests
4 Copyright (C) Volker Lendecke 2008
5 Copyright (C) Stefan Metzmacher 2011
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "includes.h"
22 #include "system/network.h"
23 #include "../lib/async_req/async_sock.h"
24 #include "../lib/util/tevent_ntstatus.h"
25 #include "../lib/util/tevent_unix.h"
26 #include "lib/util/util_net.h"
27 #include "lib/util/dlinklist.h"
28 #include "../libcli/smb/smb_common.h"
29 #include "../libcli/smb/smb_seal.h"
30 #include "../libcli/smb/smb_signing.h"
31 #include "../libcli/smb/read_smb.h"
32 #include "smbXcli_base.h"
33 #include "librpc/ndr/libndr.h"
34
35 struct smbXcli_conn;
36 struct smbXcli_req;
37 struct smbXcli_session;
38 struct smbXcli_tcon;
39
40 struct smbXcli_conn {
41 int read_fd;
42 int write_fd;
43 struct sockaddr_storage local_ss;
44 struct sockaddr_storage remote_ss;
45 const char *remote_name;
46
47 struct tevent_queue *outgoing;
48 struct tevent_req **pending;
49 struct tevent_req *read_smb_req;
50
51 enum protocol_types protocol;
52 bool allow_signing;
53 bool desire_signing;
54 bool mandatory_signing;
55
56 /*
57 * The incoming dispatch function should return:
58 * - NT_STATUS_RETRY, if more incoming PDUs are expected.
59 * - NT_STATUS_OK, if no more processing is desired, e.g.
60 * the dispatch function called
61 * tevent_req_done().
62 * - All other return values disconnect the connection.
63 */
64 NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
65 TALLOC_CTX *tmp_mem,
66 uint8_t *inbuf);
67
68 struct {
69 struct {
70 uint32_t capabilities;
71 uint32_t max_xmit;
72 } client;
73
74 struct {
75 uint32_t capabilities;
76 uint32_t max_xmit;
77 uint16_t max_mux;
78 uint16_t security_mode;
79 bool readbraw;
80 bool writebraw;
81 bool lockread;
82 bool writeunlock;
83 uint32_t session_key;
84 struct GUID guid;
85 DATA_BLOB gss_blob;
86 uint8_t challenge[8];
87 const char *workgroup;
88 const char *name;
89 int time_zone;
90 NTTIME system_time;
91 } server;
92
93 uint32_t capabilities;
94 uint32_t max_xmit;
95
96 uint16_t mid;
97
98 struct smb_signing_state *signing;
99 struct smb_trans_enc_state *trans_enc;
100
101 struct tevent_req *read_braw_req;
102 } smb1;
103
104 struct {
105 struct {
106 uint32_t capabilities;
107 uint16_t security_mode;
108 struct GUID guid;
109 } client;
110
111 struct {
112 uint32_t capabilities;
113 uint16_t security_mode;
114 struct GUID guid;
115 uint32_t max_trans_size;
116 uint32_t max_read_size;
117 uint32_t max_write_size;
118 NTTIME system_time;
119 NTTIME start_time;
120 DATA_BLOB gss_blob;
121 } server;
122
123 uint64_t mid;
124 uint16_t cur_credits;
125 uint16_t max_credits;
126 } smb2;
127
128 struct smbXcli_session *sessions;
129 };
130
131 struct smb2cli_session {
132 uint64_t session_id;
133 uint16_t session_flags;
134 DATA_BLOB application_key;
135 DATA_BLOB signing_key;
136 bool should_sign;
137 bool should_encrypt;
138 DATA_BLOB encryption_key;
139 DATA_BLOB decryption_key;
140 uint64_t nonce_high;
141 uint64_t nonce_low;
142 uint16_t channel_sequence;
143 };
144
145 struct smbXcli_session {
146 struct smbXcli_session *prev, *next;
147 struct smbXcli_conn *conn;
148
149 struct {
150 uint16_t session_id;
151 DATA_BLOB application_key;
152 bool protected_key;
153 } smb1;
154
155 struct smb2cli_session *smb2;
156
157 struct {
158 DATA_BLOB signing_key;
159 } smb2_channel;
160
161 /*
162 * this should be a short term hack
163 * until the upper layers have implemented
164 * re-authentication.
165 */
166 bool disconnect_expired;
167 };
168
169 struct smbXcli_tcon {
170 bool is_smb1;
171 uint32_t fs_attributes;
172
173 struct {
174 uint16_t tcon_id;
175 uint16_t optional_support;
176 uint32_t maximal_access;
177 uint32_t guest_maximal_access;
178 char *service;
179 char *fs_type;
180 } smb1;
181
182 struct {
183 uint32_t tcon_id;
184 uint8_t type;
185 uint32_t flags;
186 uint32_t capabilities;
187 uint32_t maximal_access;
188 bool should_encrypt;
189 } smb2;
190 };
191
192 struct smbXcli_req_state {
193 struct tevent_context *ev;
194 struct smbXcli_conn *conn;
195 struct smbXcli_session *session; /* maybe NULL */
196 struct smbXcli_tcon *tcon; /* maybe NULL */
197
198 uint8_t length_hdr[4];
199
200 bool one_way;
201
202 uint8_t *inbuf;
203
204 struct {
205 /* Space for the header including the wct */
206 uint8_t hdr[HDR_VWV];
207
208 /*
209 * For normal requests, smb1cli_req_send chooses a mid.
210 * SecondaryV trans requests need to use the mid of the primary
211 * request, so we need a place to store it.
212 * Assume it is set if != 0.
213 */
214 uint16_t mid;
215
216 uint16_t *vwv;
217 uint8_t bytecount_buf[2];
218
219 #define MAX_SMB_IOV 10
220 /* length_hdr, hdr, words, byte_count, buffers */
221 struct iovec iov[1 + 3 + MAX_SMB_IOV];
222 int iov_count;
223
224 bool one_way_seqnum;
225 uint32_t seqnum;
226 struct tevent_req **chained_requests;
227
228 uint8_t recv_cmd;
229 NTSTATUS recv_status;
230 /* always an array of 3 talloc elements */
231 struct iovec *recv_iov;
232 } smb1;
233
234 struct {
235 const uint8_t *fixed;
236 uint16_t fixed_len;
237 const uint8_t *dyn;
238 uint32_t dyn_len;
239
240 uint8_t transform[SMB2_TF_HDR_SIZE];
241 uint8_t hdr[SMB2_HDR_BODY];
242 uint8_t pad[7]; /* padding space for compounding */
243
244 /*
245 * always an array of 3 talloc elements
246 * (without a SMB2_TRANSFORM header!)
247 *
248 * HDR, BODY, DYN
249 */
250 struct iovec *recv_iov;
251
252 /*
253 * the expected max for the response dyn_len
254 */
255 uint32_t max_dyn_len;
256
257 uint16_t credit_charge;
258
259 bool should_sign;
260 bool should_encrypt;
261 uint64_t encryption_session_id;
262
263 bool signing_skipped;
264 bool notify_async;
265 bool got_async;
266 } smb2;
267 };
268
269 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
270 {
271 /*
272 * NT_STATUS_OK, means we do not notify the callers
273 */
274 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
275
276 while (conn->sessions) {
277 conn->sessions->conn = NULL;
278 DLIST_REMOVE(conn->sessions, conn->sessions);
279 }
280
281 if (conn->smb1.trans_enc) {
282 TALLOC_FREE(conn->smb1.trans_enc);
283 }
284
285 return 0;
286 }
287
288 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
289 int fd,
290 const char *remote_name,
291 enum smb_signing_setting signing_state,
292 uint32_t smb1_capabilities,
293 struct GUID *client_guid,
294 uint32_t smb2_capabilities)
295 {
296 struct smbXcli_conn *conn = NULL;
297 void *ss = NULL;
298 struct sockaddr *sa = NULL;
299 socklen_t sa_length;
300 int ret;
301
302 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
303 if (!conn) {
304 return NULL;
305 }
306
307 conn->read_fd = fd;
308 conn->write_fd = dup(fd);
309 if (conn->write_fd == -1) {
310 goto error;
311 }
312
313 conn->remote_name = talloc_strdup(conn, remote_name);
314 if (conn->remote_name == NULL) {
315 goto error;
316 }
317
318
319 ss = (void *)&conn->local_ss;
320 sa = (struct sockaddr *)ss;
321 sa_length = sizeof(conn->local_ss);
322 ret = getsockname(fd, sa, &sa_length);
323 if (ret == -1) {
324 goto error;
325 }
326 ss = (void *)&conn->remote_ss;
327 sa = (struct sockaddr *)ss;
328 sa_length = sizeof(conn->remote_ss);
329 ret = getpeername(fd, sa, &sa_length);
330 if (ret == -1) {
331 goto error;
332 }
333
334 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
335 if (conn->outgoing == NULL) {
336 goto error;
337 }
338 conn->pending = NULL;
339
340 conn->protocol = PROTOCOL_NONE;
341
342 switch (signing_state) {
343 case SMB_SIGNING_OFF:
344 /* never */
345 conn->allow_signing = false;
346 conn->desire_signing = false;
347 conn->mandatory_signing = false;
348 break;
349 case SMB_SIGNING_DEFAULT:
350 case SMB_SIGNING_IF_REQUIRED:
351 /* if the server requires it */
352 conn->allow_signing = true;
353 conn->desire_signing = false;
354 conn->mandatory_signing = false;
355 break;
356 case SMB_SIGNING_REQUIRED:
357 /* always */
358 conn->allow_signing = true;
359 conn->desire_signing = true;
360 conn->mandatory_signing = true;
361 break;
362 }
363
364 conn->smb1.client.capabilities = smb1_capabilities;
365 conn->smb1.client.max_xmit = UINT16_MAX;
366
367 conn->smb1.capabilities = conn->smb1.client.capabilities;
368 conn->smb1.max_xmit = 1024;
369
370 conn->smb1.mid = 1;
371
372 /* initialise signing */
373 conn->smb1.signing = smb_signing_init(conn,
374 conn->allow_signing,
375 conn->desire_signing,
376 conn->mandatory_signing);
377 if (!conn->smb1.signing) {
378 goto error;
379 }
380
381 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
382 if (conn->mandatory_signing) {
383 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
384 }
385 if (client_guid) {
386 conn->smb2.client.guid = *client_guid;
387 }
388 conn->smb2.client.capabilities = smb2_capabilities;
389
390 conn->smb2.cur_credits = 1;
391 conn->smb2.max_credits = 0;
392
393 talloc_set_destructor(conn, smbXcli_conn_destructor);
394 return conn;
395
396 error:
397 if (conn->write_fd != -1) {
398 close(conn->write_fd);
399 }
400 TALLOC_FREE(conn);
401 return NULL;
402 }
403
404 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
405 {
406 if (conn == NULL) {
407 return false;
408 }
409
410 if (conn->read_fd == -1) {
411 return false;
412 }
413
414 return true;
415 }
416
417 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
418 {
419 return conn->protocol;
420 }
421
422 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
423 {
424 if (conn->protocol >= PROTOCOL_SMB2_02) {
425 return true;
426 }
427
428 if (conn->smb1.capabilities & CAP_UNICODE) {
429 return true;
430 }
431
432 return false;
433 }
434
435 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
436 {
437 set_socket_options(conn->read_fd, options);
438 }
439
440 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
441 {
442 return &conn->local_ss;
443 }
444
445 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
446 {
447 return &conn->remote_ss;
448 }
449
450 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
451 {
452 return conn->remote_name;
453 }
454
455 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
456 {
457 if (conn->protocol >= PROTOCOL_SMB2_02) {
458 /*
459 * TODO...
460 */
461 return 1;
462 }
463
464 return conn->smb1.server.max_mux;
465 }
466
467 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
468 {
469 if (conn->protocol >= PROTOCOL_SMB2_02) {
470 return conn->smb2.server.system_time;
471 }
472
473 return conn->smb1.server.system_time;
474 }
475
476 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
477 {
478 if (conn->protocol >= PROTOCOL_SMB2_02) {
479 return &conn->smb2.server.gss_blob;
480 }
481
482 return &conn->smb1.server.gss_blob;
483 }
484
485 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
486 {
487 if (conn->protocol >= PROTOCOL_SMB2_02) {
488 return &conn->smb2.server.guid;
489 }
490
491 return &conn->smb1.server.guid;
492 }
493
494 struct smbXcli_conn_samba_suicide_state {
495 struct smbXcli_conn *conn;
496 struct iovec iov;
497 uint8_t buf[9];
498 };
499
500 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
501
502 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
503 struct tevent_context *ev,
504 struct smbXcli_conn *conn,
505 uint8_t exitcode)
506 {
507 struct tevent_req *req, *subreq;
508 struct smbXcli_conn_samba_suicide_state *state;
509
510 req = tevent_req_create(mem_ctx, &state,
511 struct smbXcli_conn_samba_suicide_state);
512 if (req == NULL) {
513 return NULL;
514 }
515 state->conn = conn;
516 SIVAL(state->buf, 4, 0x74697865);
517 SCVAL(state->buf, 8, exitcode);
518 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
519
520 state->iov.iov_base = state->buf;
521 state->iov.iov_len = sizeof(state->buf);
522
523 subreq = writev_send(state, ev, conn->outgoing, conn->write_fd,
524 false, &state->iov, 1);
525 if (tevent_req_nomem(subreq, req)) {
526 return tevent_req_post(req, ev);
527 }
528 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
529 return req;
530 }
531
532 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
533 {
534 struct tevent_req *req = tevent_req_callback_data(
535 subreq, struct tevent_req);
536 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
537 req, struct smbXcli_conn_samba_suicide_state);
538 ssize_t nwritten;
539 int err;
540
541 nwritten = writev_recv(subreq, &err);
542 TALLOC_FREE(subreq);
543 if (nwritten == -1) {
544 NTSTATUS status = map_nt_error_from_unix_common(err);
545 smbXcli_conn_disconnect(state->conn, status);
546 return;
547 }
548 tevent_req_done(req);
549 }
550
551 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
552 {
553 return tevent_req_simple_recv_ntstatus(req);
554 }
555
556 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
557 uint8_t exitcode)
558 {
559 TALLOC_CTX *frame = talloc_stackframe();
560 struct tevent_context *ev;
561 struct tevent_req *req;
562 NTSTATUS status = NT_STATUS_NO_MEMORY;
563 bool ok;
564
565 if (smbXcli_conn_has_async_calls(conn)) {
566 /*
567 * Can't use sync call while an async call is in flight
568 */
569 status = NT_STATUS_INVALID_PARAMETER_MIX;
570 goto fail;
571 }
572 ev = samba_tevent_context_init(frame);
573 if (ev == NULL) {
574 goto fail;
575 }
576 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
577 if (req == NULL) {
578 goto fail;
579 }
580 ok = tevent_req_poll(req, ev);
581 if (!ok) {
582 status = map_nt_error_from_unix_common(errno);
583 goto fail;
584 }
585 status = smbXcli_conn_samba_suicide_recv(req);
586 fail:
587 TALLOC_FREE(frame);
588 return status;
589 }
590
591 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
592 {
593 return conn->smb1.capabilities;
594 }
595
596 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
597 {
598 return conn->smb1.max_xmit;
599 }
600
601 bool smb1cli_conn_req_possible(struct smbXcli_conn *conn)
602 {
603 size_t pending;
604 uint16_t possible = conn->smb1.server.max_mux;
605
606 pending = tevent_queue_length(conn->outgoing);
607 if (pending >= possible) {
608 return false;
609 }
610 pending += talloc_array_length(conn->pending);
611 if (pending >= possible) {
612 return false;
613 }
614
615 return true;
616 }
617
618 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
619 {
620 return conn->smb1.server.session_key;
621 }
622
623 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
624 {
625 return conn->smb1.server.challenge;
626 }
627
628 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
629 {
630 return conn->smb1.server.security_mode;
631 }
632
633 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
634 {
635 return conn->smb1.server.readbraw;
636 }
637
638 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
639 {
640 return conn->smb1.server.writebraw;
641 }
642
643 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
644 {
645 return conn->smb1.server.lockread;
646 }
647
648 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
649 {
650 return conn->smb1.server.writeunlock;
651 }
652
653 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
654 {
655 return conn->smb1.server.time_zone;
656 }
657
658 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
659 const DATA_BLOB user_session_key,
660 const DATA_BLOB response)
661 {
662 return smb_signing_activate(conn->smb1.signing,
663 user_session_key,
664 response);
665 }
666
667 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
668 const uint8_t *buf, uint32_t seqnum)
669 {
670 const uint8_t *hdr = buf + NBT_HDR_SIZE;
671 size_t len = smb_len_nbt(buf);
672
673 return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
674 }
675
676 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
677 {
678 return smb_signing_is_active(conn->smb1.signing);
679 }
680
681 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
682 struct smb_trans_enc_state *es)
683 {
684 /* Replace the old state, if any. */
685 if (conn->smb1.trans_enc) {
686 TALLOC_FREE(conn->smb1.trans_enc);
687 }
688 conn->smb1.trans_enc = es;
689 }
690
691 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
692 {
693 return common_encryption_on(conn->smb1.trans_enc);
694 }
695
696
697 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
698 {
699 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
700 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
701
702 if (NT_STATUS_IS_OK(status)) {
703 return NT_STATUS_OK;
704 }
705
706 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
707 return status;
708 }
709
710 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
711 }
712
713 /**
714 * Is the SMB command able to hold an AND_X successor
715 * @param[in] cmd The SMB command in question
716 * @retval Can we add a chained request after "cmd"?
717 */
718 bool smb1cli_is_andx_req(uint8_t cmd)
719 {
720 switch (cmd) {
721 case SMBtconX:
722 case SMBlockingX:
723 case SMBopenX:
724 case SMBreadX:
725 case SMBwriteX:
726 case SMBsesssetupX:
727 case SMBulogoffX:
728 case SMBntcreateX:
729 return true;
730 break;
731 default:
732 break;
733 }
734
735 return false;
736 }
737
738 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
739 {
740 size_t num_pending = talloc_array_length(conn->pending);
741 uint16_t result;
742
743 if (conn->protocol == PROTOCOL_NONE) {
744 /*
745 * This is what windows sends on the SMB1 Negprot request
746 * and some vendors reuse the SMB1 MID as SMB2 sequence number.
747 */
748 return 0;
749 }
750
751 while (true) {
752 size_t i;
753
754 result = conn->smb1.mid++;
755 if ((result == 0) || (result == 0xffff)) {
756 continue;
757 }
758
759 for (i=0; i<num_pending; i++) {
760 if (result == smb1cli_req_mid(conn->pending[i])) {
761 break;
762 }
763 }
764
765 if (i == num_pending) {
766 return result;
767 }
768 }
769 }
770
771 void smbXcli_req_unset_pending(struct tevent_req *req)
772 {
773 struct smbXcli_req_state *state =
774 tevent_req_data(req,
775 struct smbXcli_req_state);
776 struct smbXcli_conn *conn = state->conn;
777 size_t num_pending = talloc_array_length(conn->pending);
778 size_t i;
779
780 if (state->smb1.mid != 0) {
781 /*
782 * This is a [nt]trans[2] request which waits
783 * for more than one reply.
784 */
785 return;
786 }
787
788 talloc_set_destructor(req, NULL);
789
790 if (num_pending == 1) {
791 /*
792 * The pending read_smb tevent_req is a child of
793 * conn->pending. So if nothing is pending anymore, we need to
794 * delete the socket read fde.
795 */
796 TALLOC_FREE(conn->pending);
797 conn->read_smb_req = NULL;
798 return;
799 }
800
801 for (i=0; i<num_pending; i++) {
802 if (req == conn->pending[i]) {
803 break;
804 }
805 }
806 if (i == num_pending) {
807 /*
808 * Something's seriously broken. Just returning here is the
809 * right thing nevertheless, the point of this routine is to
810 * remove ourselves from conn->pending.
811 */
812 return;
813 }
814
815 /*
816 * Remove ourselves from the conn->pending array
817 */
818 for (; i < (num_pending - 1); i++) {
819 conn->pending[i] = conn->pending[i+1];
820 }
821
822 /*
823 * No NULL check here, we're shrinking by sizeof(void *), and
824 * talloc_realloc just adjusts the size for this.
825 */
826 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
827 num_pending - 1);
828 return;
829 }
830
831 static int smbXcli_req_destructor(struct tevent_req *req)
832 {
833 struct smbXcli_req_state *state =
834 tevent_req_data(req,
835 struct smbXcli_req_state);
836
837 /*
838 * Make sure we really remove it from
839 * the pending array on destruction.
840 */
841 state->smb1.mid = 0;
842 smbXcli_req_unset_pending(req);
843 return 0;
844 }
845
846 static bool smb1cli_req_cancel(struct tevent_req *req);
847 static bool smb2cli_req_cancel(struct tevent_req *req);
848
849 static bool smbXcli_req_cancel(struct tevent_req *req)
850 {
851 struct smbXcli_req_state *state =
852 tevent_req_data(req,
853 struct smbXcli_req_state);
854
855 if (!smbXcli_conn_is_connected(state->conn)) {
856 return false;
857 }
858
859 if (state->conn->protocol == PROTOCOL_NONE) {
860 return false;
861 }
862
863 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
864 return smb2cli_req_cancel(req);
865 }
866
867 return smb1cli_req_cancel(req);
868 }
869
870 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
871
872 bool smbXcli_req_set_pending(struct tevent_req *req)
873 {
874 struct smbXcli_req_state *state =
875 tevent_req_data(req,
876 struct smbXcli_req_state);
877 struct smbXcli_conn *conn;
878 struct tevent_req **pending;
879 size_t num_pending;
880
881 conn = state->conn;
882
883 if (!smbXcli_conn_is_connected(conn)) {
884 return false;
885 }
886
887 num_pending = talloc_array_length(conn->pending);
888
889 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
890 num_pending+1);
891 if (pending == NULL) {
892 return false;
893 }
894 pending[num_pending] = req;
895 conn->pending = pending;
896 talloc_set_destructor(req, smbXcli_req_destructor);
897 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
898
899 if (!smbXcli_conn_receive_next(conn)) {
900 /*
901 * the caller should notify the current request
902 *
903 * And all other pending requests get notified
904 * by smbXcli_conn_disconnect().
905 */
906 smbXcli_req_unset_pending(req);
907 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
908 return false;
909 }
910
911 return true;
912 }
913
914 static void smbXcli_conn_received(struct tevent_req *subreq);
915
916 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
917 {
918 size_t num_pending = talloc_array_length(conn->pending);
919 struct tevent_req *req;
920 struct smbXcli_req_state *state;
921
922 if (conn->read_smb_req != NULL) {
923 return true;
924 }
925
926 if (num_pending == 0) {
927 if (conn->smb2.mid < UINT64_MAX) {
928 /* no more pending requests, so we are done for now */
929 return true;
930 }
931
932 /*
933 * If there are no more SMB2 requests possible,
934 * because we are out of message ids,
935 * we need to disconnect.
936 */
937 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
938 return true;
939 }
940
941 req = conn->pending[0];
942 state = tevent_req_data(req, struct smbXcli_req_state);
943
944 /*
945 * We're the first ones, add the read_smb request that waits for the
946 * answer from the server
947 */
948 conn->read_smb_req = read_smb_send(conn->pending,
949 state->ev,
950 conn->read_fd);
951 if (conn->read_smb_req == NULL) {
952 return false;
953 }
954 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
955 return true;
956 }
957
958 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
959 {
960 struct smbXcli_session *session;
961
962 tevent_queue_stop(conn->outgoing);
963
964 if (conn->read_fd != -1) {
965 close(conn->read_fd);
966 }
967 if (conn->write_fd != -1) {
968 close(conn->write_fd);
969 }
970 conn->read_fd = -1;
971 conn->write_fd = -1;
972
973 session = conn->sessions;
974 if (talloc_array_length(conn->pending) == 0) {
975 /*
976 * if we do not have pending requests
977 * there is no need to update the channel_sequence
978 */
979 session = NULL;
980 }
981 for (; session; session = session->next) {
982 smb2cli_session_increment_channel_sequence(session);
983 }
984
985 /*
986 * Cancel all pending requests. We do not do a for-loop walking
987 * conn->pending because that array changes in
988 * smbXcli_req_unset_pending.
989 */
990 while (talloc_array_length(conn->pending) > 0) {
991 struct tevent_req *req;
992 struct smbXcli_req_state *state;
993 struct tevent_req **chain;
994 size_t num_chained;
995 size_t i;
996
997 req = conn->pending[0];
998 state = tevent_req_data(req, struct smbXcli_req_state);
999
1000 if (state->smb1.chained_requests == NULL) {
1001 /*
1002 * We're dead. No point waiting for trans2
1003 * replies.
1004 */
1005 state->smb1.mid = 0;
1006
1007 smbXcli_req_unset_pending(req);
1008
1009 if (NT_STATUS_IS_OK(status)) {
1010 /* do not notify the callers */
1011 continue;
1012 }
1013
1014 /*
1015 * we need to defer the callback, because we may notify
1016 * more then one caller.
1017 */
1018 tevent_req_defer_callback(req, state->ev);
1019 tevent_req_nterror(req, status);
1020 continue;
1021 }
1022
1023 chain = talloc_move(conn, &state->smb1.chained_requests);
1024 num_chained = talloc_array_length(chain);
1025
1026 for (i=0; i<num_chained; i++) {
1027 req = chain[i];
1028 state = tevent_req_data(req, struct smbXcli_req_state);
1029
1030 /*
1031 * We're dead. No point waiting for trans2
1032 * replies.
1033 */
1034 state->smb1.mid = 0;
1035
1036 smbXcli_req_unset_pending(req);
1037
1038 if (NT_STATUS_IS_OK(status)) {
1039 /* do not notify the callers */
1040 continue;
1041 }
1042
1043 /*
1044 * we need to defer the callback, because we may notify
1045 * more than one caller.
1046 */
1047 tevent_req_defer_callback(req, state->ev);
1048 tevent_req_nterror(req, status);
1049 }
1050 TALLOC_FREE(chain);
1051 }
1052 }
1053
1054 /*
1055 * Fetch a smb request's mid. Only valid after the request has been sent by
1056 * smb1cli_req_send().
1057 */
1058 uint16_t smb1cli_req_mid(struct tevent_req *req)
1059 {
1060 struct smbXcli_req_state *state =
1061 tevent_req_data(req,
1062 struct smbXcli_req_state);
1063
1064 if (state->smb1.mid != 0) {
1065 return state->smb1.mid;
1066 }
1067
1068 return SVAL(state->smb1.hdr, HDR_MID);
1069 }
1070
1071 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1072 {
1073 struct smbXcli_req_state *state =
1074 tevent_req_data(req,
1075 struct smbXcli_req_state);
1076
1077 state->smb1.mid = mid;
1078 }
1079
1080 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1081 {
1082 struct smbXcli_req_state *state =
1083 tevent_req_data(req,
1084 struct smbXcli_req_state);
1085
1086 return state->smb1.seqnum;
1087 }
1088
1089 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1090 {
1091 struct smbXcli_req_state *state =
1092 tevent_req_data(req,
1093 struct smbXcli_req_state);
1094
1095 state->smb1.seqnum = seqnum;
1096 }
1097
1098 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1099 {
1100 size_t result = 0;
1101 int i;
1102 for (i=0; i<count; i++) {
1103 result += iov[i].iov_len;
1104 }
1105 return result;
1106 }
1107
1108 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1109 const struct iovec *iov,
1110 int count)
1111 {
1112 size_t len = smbXcli_iov_len(iov, count);
1113 size_t copied;
1114 uint8_t *buf;
1115 int i;
1116
1117 buf = talloc_array(mem_ctx, uint8_t, len);
1118 if (buf == NULL) {
1119 return NULL;
1120 }
1121 copied = 0;
1122 for (i=0; i<count; i++) {
1123 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
1124 copied += iov[i].iov_len;
1125 }
1126 return buf;
1127 }
1128
1129 static void smb1cli_req_flags(enum protocol_types protocol,
1130 uint32_t smb1_capabilities,
1131 uint8_t smb_command,
1132 uint8_t additional_flags,
1133 uint8_t clear_flags,
1134 uint8_t *_flags,
1135 uint16_t additional_flags2,
1136 uint16_t clear_flags2,
1137 uint16_t *_flags2)
1138 {
1139 uint8_t flags = 0;
1140 uint16_t flags2 = 0;
1141
1142 if (protocol >= PROTOCOL_LANMAN1) {
1143 flags |= FLAG_CASELESS_PATHNAMES;
1144 flags |= FLAG_CANONICAL_PATHNAMES;
1145 }
1146
1147 if (protocol >= PROTOCOL_LANMAN2) {
1148 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1149 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1150 }
1151
1152 if (protocol >= PROTOCOL_NT1) {
1153 flags2 |= FLAGS2_IS_LONG_NAME;
1154
1155 if (smb1_capabilities & CAP_UNICODE) {
1156 flags2 |= FLAGS2_UNICODE_STRINGS;
1157 }
1158 if (smb1_capabilities & CAP_STATUS32) {
1159 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1160 }
1161 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1162 flags2 |= FLAGS2_EXTENDED_SECURITY;
1163 }
1164 }
1165
1166 flags |= additional_flags;
1167 flags &= ~clear_flags;
1168 flags2 |= additional_flags2;
1169 flags2 &= ~clear_flags2;
1170
1171 *_flags = flags;
1172 *_flags2 = flags2;
1173 }
1174
1175 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1176
1177 static bool smb1cli_req_cancel(struct tevent_req *req)
1178 {
1179 struct smbXcli_req_state *state =
1180 tevent_req_data(req,
1181 struct smbXcli_req_state);
1182 uint8_t flags;
1183 uint16_t flags2;
1184 uint32_t pid;
1185 uint16_t mid;
1186 struct tevent_req *subreq;
1187 NTSTATUS status;
1188
1189 flags = CVAL(state->smb1.hdr, HDR_FLG);
1190 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1191 pid = SVAL(state->smb1.hdr, HDR_PID);
1192 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1193 mid = SVAL(state->smb1.hdr, HDR_MID);
1194
1195 subreq = smb1cli_req_create(state, state->ev,
1196 state->conn,
1197 SMBntcancel,
1198 flags, 0,
1199 flags2, 0,
1200 0, /* timeout */
1201 pid,
1202 state->tcon,
1203 state->session,
1204 0, NULL, /* vwv */
1205 0, NULL); /* bytes */
1206 if (subreq == NULL) {
1207 return false;
1208 }
1209 smb1cli_req_set_mid(subreq, mid);
1210
1211 status = smb1cli_req_chain_submit(&subreq, 1);
1212 if (!NT_STATUS_IS_OK(status)) {
1213 TALLOC_FREE(subreq);
1214 return false;
1215 }
1216 smb1cli_req_set_mid(subreq, 0);
1217
1218 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1219
1220 return true;
1221 }
1222
1223 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1224 {
1225 /* we do not care about the result */
1226 TALLOC_FREE(subreq);
1227 }
1228
1229 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1230 struct tevent_context *ev,
1231 struct smbXcli_conn *conn,
1232 uint8_t smb_command,
1233 uint8_t additional_flags,
1234 uint8_t clear_flags,
1235 uint16_t additional_flags2,
1236 uint16_t clear_flags2,
1237 uint32_t timeout_msec,
1238 uint32_t pid,
1239 struct smbXcli_tcon *tcon,
1240 struct smbXcli_session *session,
1241 uint8_t wct, uint16_t *vwv,
1242 int iov_count,
1243 struct iovec *bytes_iov)
1244 {
1245 struct tevent_req *req;
1246 struct smbXcli_req_state *state;
1247 uint8_t flags = 0;
1248 uint16_t flags2 = 0;
1249 uint16_t uid = 0;
1250 uint16_t tid = 0;
1251
1252 if (iov_count > MAX_SMB_IOV) {
1253 /*
1254 * Should not happen :-)
1255 */
1256 return NULL;
1257 }
1258
1259 req = tevent_req_create(mem_ctx, &state,
1260 struct smbXcli_req_state);
1261 if (req == NULL) {
1262 return NULL;
1263 }
1264 state->ev = ev;
1265 state->conn = conn;
1266 state->session = session;
1267 state->tcon = tcon;
1268
1269 if (session) {
1270 uid = session->smb1.session_id;
1271 }
1272
1273 if (tcon) {
1274 tid = tcon->smb1.tcon_id;
1275
1276 if (tcon->fs_attributes & FILE_CASE_SENSITIVE_SEARCH) {
1277 clear_flags |= FLAG_CASELESS_PATHNAMES;
1278 } else {
1279 /* Default setting, case insensitive. */
1280 additional_flags |= FLAG_CASELESS_PATHNAMES;
1281 }
1282
1283 if (smbXcli_conn_dfs_supported(conn) &&
1284 smbXcli_tcon_is_dfs_share(tcon))
1285 {
1286 additional_flags2 |= FLAGS2_DFS_PATHNAMES;
1287 }
1288 }
1289
1290 state->smb1.recv_cmd = 0xFF;
1291 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1292 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1293 if (state->smb1.recv_iov == NULL) {
1294 TALLOC_FREE(req);
1295 return NULL;
1296 }
1297
1298 smb1cli_req_flags(conn->protocol,
1299 conn->smb1.capabilities,
1300 smb_command,
1301 additional_flags,
1302 clear_flags,
1303 &flags,
1304 additional_flags2,
1305 clear_flags2,
1306 &flags2);
1307
1308 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1309 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1310 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1311 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1312 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1313 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1314 SSVAL(state->smb1.hdr, HDR_TID, tid);
1315 SSVAL(state->smb1.hdr, HDR_PID, pid);
1316 SSVAL(state->smb1.hdr, HDR_UID, uid);
1317 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1318 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1319
1320 state->smb1.vwv = vwv;
1321
1322 SSVAL(state->smb1.bytecount_buf, 0, smbXcli_iov_len(bytes_iov, iov_count));
1323
1324 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1325 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1326 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1327 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1328 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1329 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1330 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1331 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1332
1333 if (iov_count != 0) {
1334 memcpy(&state->smb1.iov[4], bytes_iov,
1335 iov_count * sizeof(*bytes_iov));
1336 }
1337 state->smb1.iov_count = iov_count + 4;
1338
1339 if (timeout_msec > 0) {
1340 struct timeval endtime;
1341
1342 endtime = timeval_current_ofs_msec(timeout_msec);
1343 if (!tevent_req_set_endtime(req, ev, endtime)) {
1344 return req;
1345 }
1346 }
1347
1348 switch (smb_command) {
1349 case SMBtranss:
1350 case SMBtranss2:
1351 case SMBnttranss:
1352 state->one_way = true;
1353 break;
1354 case SMBntcancel:
1355 state->one_way = true;
1356 state->smb1.one_way_seqnum = true;
1357 break;
1358 case SMBlockingX:
1359 if ((wct == 8) &&
1360 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1361 state->one_way = true;
1362 }
1363 break;
1364 }
1365
1366 return req;
1367 }
1368
1369 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1370 struct iovec *iov, int iov_count,
1371 uint32_t *seqnum,
1372 bool one_way_seqnum)
1373 {
1374 TALLOC_CTX *frame = NULL;
1375 uint8_t *buf;
1376
1377 /*
1378 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1379 * iovec directly. MD5Update would do that just fine.
1380 */
1381
1382 if (iov_count < 4) {
1383 return NT_STATUS_INVALID_PARAMETER_MIX;
1384 }
1385 if (iov[0].iov_len != NBT_HDR_SIZE) {
1386 return NT_STATUS_INVALID_PARAMETER_MIX;
1387 }
1388 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1389 return NT_STATUS_INVALID_PARAMETER_MIX;
1390 }
1391 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1392 return NT_STATUS_INVALID_PARAMETER_MIX;
1393 }
1394 if (iov[3].iov_len != sizeof(uint16_t)) {
1395 return NT_STATUS_INVALID_PARAMETER_MIX;
1396 }
1397
1398 frame = talloc_stackframe();
1399
1400 buf = smbXcli_iov_concat(frame, &iov[1], iov_count - 1);
1401 if (buf == NULL) {
1402 return NT_STATUS_NO_MEMORY;
1403 }
1404
1405 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1406 one_way_seqnum);
1407 smb_signing_sign_pdu(conn->smb1.signing,
1408 buf, talloc_get_size(buf),
1409 *seqnum);
1410 memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1411
1412 TALLOC_FREE(frame);
1413 return NT_STATUS_OK;
1414 }
1415
1416 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1417 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1418 TALLOC_CTX *tmp_mem,
1419 uint8_t *inbuf);
1420
1421 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1422 struct smbXcli_req_state *state,
1423 struct iovec *iov, int iov_count)
1424 {
1425 struct tevent_req *subreq;
1426 NTSTATUS status;
1427 uint8_t cmd;
1428 uint16_t mid;
1429
1430 if (!smbXcli_conn_is_connected(state->conn)) {
1431 return NT_STATUS_CONNECTION_DISCONNECTED;
1432 }
1433
1434 if (state->conn->protocol > PROTOCOL_NT1) {
1435 return NT_STATUS_REVISION_MISMATCH;
1436 }
1437
1438 if (iov_count < 4) {
1439 return NT_STATUS_INVALID_PARAMETER_MIX;
1440 }
1441 if (iov[0].iov_len != NBT_HDR_SIZE) {
1442 return NT_STATUS_INVALID_PARAMETER_MIX;
1443 }
1444 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1445 return NT_STATUS_INVALID_PARAMETER_MIX;
1446 }
1447 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1448 return NT_STATUS_INVALID_PARAMETER_MIX;
1449 }
1450 if (iov[3].iov_len != sizeof(uint16_t)) {
1451 return NT_STATUS_INVALID_PARAMETER_MIX;
1452 }
1453
1454 cmd = CVAL(iov[1].iov_base, HDR_COM);
1455 if (cmd == SMBreadBraw) {
1456 if (smbXcli_conn_has_async_calls(state->conn)) {
1457 return NT_STATUS_INVALID_PARAMETER_MIX;
1458 }
1459 state->conn->smb1.read_braw_req = req;
1460 }
1461
1462 if (state->smb1.mid != 0) {
1463 mid = state->smb1.mid;
1464 } else {
1465 mid = smb1cli_alloc_mid(state->conn);
1466 }
1467 SSVAL(iov[1].iov_base, HDR_MID, mid);
1468
1469 _smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
1470
1471 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1472 &state->smb1.seqnum,
1473 state->smb1.one_way_seqnum);
1474
1475 if (!NT_STATUS_IS_OK(status)) {
1476 return status;
1477 }
1478
1479 /*
1480 * If we supported multiple encrytion contexts
1481 * here we'd look up based on tid.
1482 */
1483 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1484 char *buf, *enc_buf;
1485
1486 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1487 if (buf == NULL) {
1488 return NT_STATUS_NO_MEMORY;
1489 }
1490 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1491 (char *)buf, &enc_buf);
1492 TALLOC_FREE(buf);
1493 if (!NT_STATUS_IS_OK(status)) {
1494 DEBUG(0, ("Error in encrypting client message: %s\n",
1495 nt_errstr(status)));
1496 return status;
1497 }
1498 buf = (char *)talloc_memdup(state, enc_buf,
1499 smb_len_nbt(enc_buf)+4);
1500 SAFE_FREE(enc_buf);
1501 if (buf == NULL) {
1502 return NT_STATUS_NO_MEMORY;
1503 }
1504 iov[0].iov_base = (void *)buf;
1505 iov[0].iov_len = talloc_get_size(buf);
1506 iov_count = 1;
1507 }
1508
1509 if (state->conn->dispatch_incoming == NULL) {
1510 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1511 }
1512
1513 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1514
1515 subreq = writev_send(state, state->ev, state->conn->outgoing,
1516 state->conn->write_fd, false, iov, iov_count);
1517 if (subreq == NULL) {
1518 return NT_STATUS_NO_MEMORY;
1519 }
1520 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1521 return NT_STATUS_OK;
1522 }
1523
1524 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1525 struct tevent_context *ev,
1526 struct smbXcli_conn *conn,
1527 uint8_t smb_command,
1528 uint8_t additional_flags,
1529 uint8_t clear_flags,
1530 uint16_t additional_flags2,
1531 uint16_t clear_flags2,
1532 uint32_t timeout_msec,
1533 uint32_t pid,
1534 struct smbXcli_tcon *tcon,
1535 struct smbXcli_session *session,
1536 uint8_t wct, uint16_t *vwv,
1537 uint32_t num_bytes,
1538 const uint8_t *bytes)
1539 {
1540 struct tevent_req *req;
1541 struct iovec iov;
1542 NTSTATUS status;
1543
1544 iov.iov_base = discard_const_p(void, bytes);
1545 iov.iov_len = num_bytes;
1546
1547 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1548 additional_flags, clear_flags,
1549 additional_flags2, clear_flags2,
1550 timeout_msec,
1551 pid, tcon, session,
1552 wct, vwv, 1, &iov);
1553 if (req == NULL) {
1554 return NULL;
1555 }
1556 if (!tevent_req_is_in_progress(req)) {
1557 return tevent_req_post(req, ev);
1558 }
1559 status = smb1cli_req_chain_submit(&req, 1);
1560 if (tevent_req_nterror(req, status)) {
1561 return tevent_req_post(req, ev);
1562 }
1563 return req;
1564 }
1565
1566 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1567 {
1568 struct tevent_req *req =
1569 tevent_req_callback_data(subreq,
1570 struct tevent_req);
1571 struct smbXcli_req_state *state =
1572 tevent_req_data(req,
1573 struct smbXcli_req_state);
1574 ssize_t nwritten;
1575 int err;
1576
1577 nwritten = writev_recv(subreq, &err);
1578 TALLOC_FREE(subreq);
1579 if (nwritten == -1) {
1580 NTSTATUS status = map_nt_error_from_unix_common(err);
1581 smbXcli_conn_disconnect(state->conn, status);
1582 return;
1583 }
1584
1585 if (state->one_way) {
1586 state->inbuf = NULL;
1587 tevent_req_done(req);
1588 return;
1589 }
1590
1591 if (!smbXcli_req_set_pending(req)) {
1592 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1593 return;
1594 }
1595 }
1596
1597 static void smbXcli_conn_received(struct tevent_req *subreq)
1598 {
1599 struct smbXcli_conn *conn =
1600 tevent_req_callback_data(subreq,
1601 struct smbXcli_conn);
1602 TALLOC_CTX *frame = talloc_stackframe();
1603 NTSTATUS status;
1604 uint8_t *inbuf;
1605 ssize_t received;
1606 int err;
1607
1608 if (subreq != conn->read_smb_req) {
1609 DEBUG(1, ("Internal error: cli_smb_received called with "
1610 "unexpected subreq\n"));
1611 status = NT_STATUS_INTERNAL_ERROR;
1612 smbXcli_conn_disconnect(conn, status);
1613 TALLOC_FREE(frame);
1614 return;
1615 }
1616 conn->read_smb_req = NULL;
1617
1618 received = read_smb_recv(subreq, frame, &inbuf, &err);
1619 TALLOC_FREE(subreq);
1620 if (received == -1) {
1621 status = map_nt_error_from_unix_common(err);
1622 smbXcli_conn_disconnect(conn, status);
1623 TALLOC_FREE(frame);
1624 return;
1625 }
1626
1627 status = conn->dispatch_incoming(conn, frame, inbuf);
1628 TALLOC_FREE(frame);
1629 if (NT_STATUS_IS_OK(status)) {
1630 /*
1631 * We should not do any more processing
1632 * as the dispatch function called
1633 * tevent_req_done().
1634 */
1635 return;
1636 } else if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1637 /*
1638 * We got an error, so notify all pending requests
1639 */
1640 smbXcli_conn_disconnect(conn, status);
1641 return;
1642 }
1643
1644 /*
1645 * We got NT_STATUS_RETRY, so we may ask for a
1646 * next incoming pdu.
1647 */
1648 if (!smbXcli_conn_receive_next(conn)) {
1649 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1650 }
1651 }
1652
1653 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1654 struct iovec **piov, int *pnum_iov)
1655 {
1656 struct iovec *iov;
1657 int num_iov;
1658 size_t buflen;
1659 size_t taken;
1660 size_t remaining;
1661 uint8_t *hdr;
1662 uint8_t cmd;
1663 uint32_t wct_ofs;
1664 NTSTATUS status;
1665 size_t min_size = MIN_SMB_SIZE;
1666
1667 buflen = smb_len_tcp(buf);
1668 taken = 0;
1669
1670 hdr = buf + NBT_HDR_SIZE;
1671
1672 status = smb1cli_pull_raw_error(hdr);
1673 if (NT_STATUS_IS_ERR(status)) {
1674 /*
1675 * This is an ugly hack to support OS/2
1676 * which skips the byte_count in the DATA block
1677 * on some error responses.
1678 *
1679 * See bug #9096
1680 */
1681 min_size -= sizeof(uint16_t);
1682 }
1683
1684 if (buflen < min_size) {
1685 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1686 }
1687
1688 /*
1689 * This returns iovec elements in the following order:
1690 *
1691 * - SMB header
1692 *
1693 * - Parameter Block
1694 * - Data Block
1695 *
1696 * - Parameter Block
1697 * - Data Block
1698 *
1699 * - Parameter Block
1700 * - Data Block
1701 */
1702 num_iov = 1;
1703
1704 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1705 if (iov == NULL) {
1706 return NT_STATUS_NO_MEMORY;
1707 }
1708 iov[0].iov_base = hdr;
1709 iov[0].iov_len = HDR_WCT;
1710 taken += HDR_WCT;
1711
1712 cmd = CVAL(hdr, HDR_COM);
1713 wct_ofs = HDR_WCT;
1714
1715 while (true) {
1716 size_t len = buflen - taken;
1717 struct iovec *cur;
1718 struct iovec *iov_tmp;
1719 uint8_t wct;
1720 uint32_t bcc_ofs;
1721 uint16_t bcc;
1722 size_t needed;
1723
1724 /*
1725 * we need at least WCT
1726 */
1727 needed = sizeof(uint8_t);
1728 if (len < needed) {
1729 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1730 __location__, (int)len, (int)needed));
1731 goto inval;
1732 }
1733
1734 /*
1735 * Now we check if the specified words are there
1736 */
1737 wct = CVAL(hdr, wct_ofs);
1738 needed += wct * sizeof(uint16_t);
1739 if (len < needed) {
1740 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1741 __location__, (int)len, (int)needed));
1742 goto inval;
1743 }
1744
1745 if ((num_iov == 1) &&
1746 (len == needed) &&
1747 NT_STATUS_IS_ERR(status))
1748 {
1749 /*
1750 * This is an ugly hack to support OS/2
1751 * which skips the byte_count in the DATA block
1752 * on some error responses.
1753 *
1754 * See bug #9096
1755 */
1756 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1757 num_iov + 2);
1758 if (iov_tmp == NULL) {
1759 TALLOC_FREE(iov);
1760 return NT_STATUS_NO_MEMORY;
1761 }
1762 iov = iov_tmp;
1763 cur = &iov[num_iov];
1764 num_iov += 2;
1765
1766 cur[0].iov_len = 0;
1767 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1768 cur[1].iov_len = 0;
1769 cur[1].iov_base = cur[0].iov_base;
1770
1771 taken += needed;
1772 break;
1773 }
1774
1775 /*
1776 * we need at least BCC
1777 */
1778 needed += sizeof(uint16_t);
1779 if (len < needed) {
1780 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1781 __location__, (int)len, (int)needed));
1782 goto inval;
1783 }
1784
1785 /*
1786 * Now we check if the specified bytes are there
1787 */
1788 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1789 bcc = SVAL(hdr, bcc_ofs);
1790 needed += bcc * sizeof(uint8_t);
1791 if (len < needed) {
1792 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1793 __location__, (int)len, (int)needed));
1794 goto inval;
1795 }
1796
1797 /*
1798 * we allocate 2 iovec structures for words and bytes
1799 */
1800 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1801 num_iov + 2);
1802 if (iov_tmp == NULL) {
1803 TALLOC_FREE(iov);
1804 return NT_STATUS_NO_MEMORY;
1805 }
1806 iov = iov_tmp;
1807 cur = &iov[num_iov];
1808 num_iov += 2;
1809
1810 cur[0].iov_len = wct * sizeof(uint16_t);
1811 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1812 cur[1].iov_len = bcc * sizeof(uint8_t);
1813 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1814
1815 taken += needed;
1816
1817 if (!smb1cli_is_andx_req(cmd)) {
1818 /*
1819 * If the current command does not have AndX chanining
1820 * we are done.
1821 */
1822 break;
1823 }
1824
1825 if (wct == 0 && bcc == 0) {
1826 /*
1827 * An empty response also ends the chain,
1828 * most likely with an error.
1829 */
1830 break;
1831 }
1832
1833 if (wct < 2) {
1834 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1835 __location__, (int)wct, (int)cmd));
1836 goto inval;
1837 }
1838 cmd = CVAL(cur[0].iov_base, 0);
1839 if (cmd == 0xFF) {
1840 /*
1841 * If it is the end of the chain we are also done.
1842 */
1843 break;
1844 }
1845 wct_ofs = SVAL(cur[0].iov_base, 2);
1846
1847 if (wct_ofs < taken) {
1848 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1849 }
1850 if (wct_ofs > buflen) {
1851 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1852 }
1853
1854 /*
1855 * we consumed everything up to the start of the next
1856 * parameter block.
1857 */
1858 taken = wct_ofs;
1859 }
1860
1861 remaining = buflen - taken;
1862
1863 if (remaining > 0 && num_iov >= 3) {
1864 /*
1865 * The last DATA block gets the remaining
1866 * bytes, this is needed to support
1867 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1868 */
1869 iov[num_iov-1].iov_len += remaining;
1870 }
1871
1872 *piov = iov;
1873 *pnum_iov = num_iov;
1874 return NT_STATUS_OK;
1875
1876 inval:
1877 TALLOC_FREE(iov);
1878 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1879 }
1880
1881 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1882 TALLOC_CTX *tmp_mem,
1883 uint8_t *inbuf)
1884 {
1885 struct tevent_req *req;
1886 struct smbXcli_req_state *state;
1887 NTSTATUS status;
1888 size_t num_pending;
1889 size_t i;
1890 uint8_t cmd;
1891 uint16_t mid;
1892 bool oplock_break;
1893 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1894 size_t len = smb_len_tcp(inbuf);
1895 struct iovec *iov = NULL;
1896 int num_iov = 0;
1897 struct tevent_req **chain = NULL;
1898 size_t num_chained = 0;
1899 size_t num_responses = 0;
1900
1901 if (conn->smb1.read_braw_req != NULL) {
1902 req = conn->smb1.read_braw_req;
1903 conn->smb1.read_braw_req = NULL;
1904 state = tevent_req_data(req, struct smbXcli_req_state);
1905
1906 smbXcli_req_unset_pending(req);
1907
1908 if (state->smb1.recv_iov == NULL) {
1909 /*
1910 * For requests with more than
1911 * one response, we have to readd the
1912 * recv_iov array.
1913 */
1914 state->smb1.recv_iov = talloc_zero_array(state,
1915 struct iovec,
1916 3);
1917 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1918 return NT_STATUS_OK;
1919 }
1920 }
1921
1922 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
1923 state->smb1.recv_iov[0].iov_len = len;
1924 ZERO_STRUCT(state->smb1.recv_iov[1]);
1925 ZERO_STRUCT(state->smb1.recv_iov[2]);
1926
1927 state->smb1.recv_cmd = SMBreadBraw;
1928 state->smb1.recv_status = NT_STATUS_OK;
1929 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1930
1931 tevent_req_done(req);
1932 return NT_STATUS_OK;
1933 }
1934
1935 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1936 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1937 DEBUG(10, ("Got non-SMB PDU\n"));
1938 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1939 }
1940
1941 /*
1942 * If we supported multiple encrytion contexts
1943 * here we'd look up based on tid.
1944 */
1945 if (common_encryption_on(conn->smb1.trans_enc)
1946 && (CVAL(inbuf, 0) == 0)) {
1947 uint16_t enc_ctx_num;
1948
1949 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1950 if (!NT_STATUS_IS_OK(status)) {
1951 DEBUG(10, ("get_enc_ctx_num returned %s\n",
1952 nt_errstr(status)));
1953 return status;
1954 }
1955
1956 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1957 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1958 enc_ctx_num,
1959 conn->smb1.trans_enc->enc_ctx_num));
1960 return NT_STATUS_INVALID_HANDLE;
1961 }
1962
1963 status = common_decrypt_buffer(conn->smb1.trans_enc,
1964 (char *)inbuf);
1965 if (!NT_STATUS_IS_OK(status)) {
1966 DEBUG(10, ("common_decrypt_buffer returned %s\n",
1967 nt_errstr(status)));
1968 return status;
1969 }
1970 inhdr = inbuf + NBT_HDR_SIZE;
1971 len = smb_len_nbt(inbuf);
1972 }
1973
1974 mid = SVAL(inhdr, HDR_MID);
1975 num_pending = talloc_array_length(conn->pending);
1976
1977 for (i=0; i<num_pending; i++) {
1978 if (mid == smb1cli_req_mid(conn->pending[i])) {
1979 break;
1980 }
1981 }
1982 if (i == num_pending) {
1983 /* Dump unexpected reply */
1984 return NT_STATUS_RETRY;
1985 }
1986
1987 oplock_break = false;
1988
1989 if (mid == 0xffff) {
1990 /*
1991 * Paranoia checks that this is really an oplock break request.
1992 */
1993 oplock_break = (len == 51); /* hdr + 8 words */
1994 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
1995 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
1996 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
1997 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
1998
1999 if (!oplock_break) {
2000 /* Dump unexpected reply */
2001 return NT_STATUS_RETRY;
2002 }
2003 }
2004
2005 req = conn->pending[i];
2006 state = tevent_req_data(req, struct smbXcli_req_state);
2007
2008 if (!oplock_break /* oplock breaks are not signed */
2009 && !smb_signing_check_pdu(conn->smb1.signing,
2010 inhdr, len, state->smb1.seqnum+1)) {
2011 DEBUG(10, ("cli_check_sign_mac failed\n"));
2012 return NT_STATUS_ACCESS_DENIED;
2013 }
2014
2015 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
2016 &iov, &num_iov);
2017 if (!NT_STATUS_IS_OK(status)) {
2018 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
2019 nt_errstr(status)));
2020 return status;
2021 }
2022
2023 cmd = CVAL(inhdr, HDR_COM);
2024 status = smb1cli_pull_raw_error(inhdr);
2025
2026 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
2027 (state->session != NULL) && state->session->disconnect_expired)
2028 {
2029 /*
2030 * this should be a short term hack
2031 * until the upper layers have implemented
2032 * re-authentication.
2033 */
2034 return status;
2035 }
2036
2037 if (state->smb1.chained_requests == NULL) {
2038 if (num_iov != 3) {
2039 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2040 }
2041
2042 smbXcli_req_unset_pending(req);
2043
2044 if (state->smb1.recv_iov == NULL) {
2045 /*
2046 * For requests with more than
2047 * one response, we have to readd the
2048 * recv_iov array.
2049 */
2050 state->smb1.recv_iov = talloc_zero_array(state,
2051 struct iovec,
2052 3);
2053 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2054 return NT_STATUS_OK;
2055 }
2056 }
2057
2058 state->smb1.recv_cmd = cmd;
2059 state->smb1.recv_status = status;
2060 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2061
2062 state->smb1.recv_iov[0] = iov[0];
2063 state->smb1.recv_iov[1] = iov[1];
2064 state->smb1.recv_iov[2] = iov[2];
2065
2066 if (talloc_array_length(conn->pending) == 0) {
2067 tevent_req_done(req);
2068 return NT_STATUS_OK;
2069 }
2070
2071 tevent_req_defer_callback(req, state->ev);
2072 tevent_req_done(req);
2073 return NT_STATUS_RETRY;
2074 }
2075
2076 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2077 num_chained = talloc_array_length(chain);
2078 num_responses = (num_iov - 1)/2;
2079
2080 if (num_responses > num_chained) {
2081 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2082 }
2083
2084 for (i=0; i<num_chained; i++) {
2085 size_t iov_idx = 1 + (i*2);
2086 struct iovec *cur = &iov[iov_idx];
2087 uint8_t *inbuf_ref;
2088
2089 req = chain[i];
2090 state = tevent_req_data(req, struct smbXcli_req_state);
2091
2092 smbXcli_req_unset_pending(req);
2093
2094 /*
2095 * as we finish multiple requests here
2096 * we need to defer the callbacks as
2097 * they could destroy our current stack state.
2098 */
2099 tevent_req_defer_callback(req, state->ev);
2100
2101 if (i >= num_responses) {
2102 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2103 continue;
2104 }
2105
2106 if (state->smb1.recv_iov == NULL) {
2107 /*
2108 * For requests with more than
2109 * one response, we have to readd the
2110 * recv_iov array.
2111 */
2112 state->smb1.recv_iov = talloc_zero_array(state,
2113 struct iovec,
2114 3);
2115 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2116 continue;
2117 }
2118 }
2119
2120 state->smb1.recv_cmd = cmd;
2121
2122 if (i == (num_responses - 1)) {
2123 /*
2124 * The last request in the chain gets the status
2125 */
2126 state->smb1.recv_status = status;
2127 } else {
2128 cmd = CVAL(cur[0].iov_base, 0);
2129 state->smb1.recv_status = NT_STATUS_OK;
2130 }
2131
2132 state->inbuf = inbuf;
2133
2134 /*
2135 * Note: here we use talloc_reference() in a way
2136 * that does not expose it to the caller.
2137 */
2138 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2139 if (tevent_req_nomem(inbuf_ref, req)) {
2140 continue;
2141 }
2142
2143 /* copy the related buffers */
2144 state->smb1.recv_iov[0] = iov[0];
2145 state->smb1.recv_iov[1] = cur[0];
2146 state->smb1.recv_iov[2] = cur[1];
2147
2148 tevent_req_done(req);
2149 }
2150
2151 return NT_STATUS_RETRY;
2152 }
2153
2154 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2155 TALLOC_CTX *mem_ctx,
2156 struct iovec **piov,
2157 uint8_t **phdr,
2158 uint8_t *pwct,
2159 uint16_t **pvwv,
2160 uint32_t *pvwv_offset,
2161 uint32_t *pnum_bytes,
2162 uint8_t **pbytes,
2163 uint32_t *pbytes_offset,
2164 uint8_t **pinbuf,
2165 const struct smb1cli_req_expected_response *expected,
2166 size_t num_expected)
2167 {
2168 struct smbXcli_req_state *state =
2169 tevent_req_data(req,
2170 struct smbXcli_req_state);
2171 NTSTATUS status = NT_STATUS_OK;
2172 struct iovec *recv_iov = NULL;
2173 uint8_t *hdr = NULL;
2174 uint8_t wct = 0;
2175 uint32_t vwv_offset = 0;
2176 uint16_t *vwv = NULL;
2177 uint32_t num_bytes = 0;
2178 uint32_t bytes_offset = 0;
2179 uint8_t *bytes = NULL;
2180 size_t i;
2181 bool found_status = false;
2182 bool found_size = false;
2183
2184 if (piov != NULL) {
2185 *piov = NULL;
2186 }
2187 if (phdr != NULL) {
2188 *phdr = 0;
2189 }
2190 if (pwct != NULL) {
2191 *pwct = 0;
2192 }
2193 if (pvwv != NULL) {
2194 *pvwv = NULL;
2195 }
2196 if (pvwv_offset != NULL) {
2197 *pvwv_offset = 0;
2198 }
2199 if (pnum_bytes != NULL) {
2200 *pnum_bytes = 0;
2201 }
2202 if (pbytes != NULL) {
2203 *pbytes = NULL;
2204 }
2205 if (pbytes_offset != NULL) {
2206 *pbytes_offset = 0;
2207 }
2208 if (pinbuf != NULL) {
2209 *pinbuf = NULL;
2210 }
2211
2212 if (state->inbuf != NULL) {
2213 recv_iov = state->smb1.recv_iov;
2214 state->smb1.recv_iov = NULL;
2215 if (state->smb1.recv_cmd != SMBreadBraw) {
2216 hdr = (uint8_t *)recv_iov[0].iov_base;
2217 wct = recv_iov[1].iov_len/2;
2218 vwv = (uint16_t *)recv_iov[1].iov_base;
2219 vwv_offset = PTR_DIFF(vwv, hdr);
2220 num_bytes = recv_iov[2].iov_len;
2221 bytes = (uint8_t *)recv_iov[2].iov_base;
2222 bytes_offset = PTR_DIFF(bytes, hdr);
2223 }
2224 }
2225
2226 if (tevent_req_is_nterror(req, &status)) {
2227 for (i=0; i < num_expected; i++) {
2228 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2229 found_status = true;
2230 break;
2231 }
2232 }
2233
2234 if (found_status) {
2235 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2236 }
2237
2238 return status;
2239 }
2240
2241 if (num_expected == 0) {
2242 found_status = true;
2243 found_size = true;
2244 }
2245
2246 status = state->smb1.recv_status;
2247
2248 for (i=0; i < num_expected; i++) {
2249 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2250 continue;
2251 }
2252
2253 found_status = true;
2254 if (expected[i].wct == 0) {
2255 found_size = true;
2256 break;
2257 }
2258
2259 if (expected[i].wct == wct) {
2260 found_size = true;
2261 break;
2262 }
2263 }
2264
2265 if (!found_status) {
2266 return status;
2267 }
2268
2269 if (!found_size) {
2270 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2271 }
2272
2273 if (piov != NULL) {
2274 *piov = talloc_move(mem_ctx, &recv_iov);
2275 }
2276
2277 if (phdr != NULL) {
2278 *phdr = hdr;
2279 }
2280 if (pwct != NULL) {
2281 *pwct = wct;
2282 }
2283 if (pvwv != NULL) {
2284 *pvwv = vwv;
2285 }
2286 if (pvwv_offset != NULL) {
2287 *pvwv_offset = vwv_offset;
2288 }
2289 if (pnum_bytes != NULL) {
2290 *pnum_bytes = num_bytes;
2291 }
2292 if (pbytes != NULL) {
2293 *pbytes = bytes;
2294 }
2295 if (pbytes_offset != NULL) {
2296 *pbytes_offset = bytes_offset;
2297 }
2298 if (pinbuf != NULL) {
2299 *pinbuf = state->inbuf;
2300 }
2301
2302 return status;
2303 }
2304
2305 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2306 {
2307 size_t wct_ofs;
2308 int i;
2309
2310 wct_ofs = HDR_WCT;
2311
2312 for (i=0; i<num_reqs; i++) {
2313 struct smbXcli_req_state *state;
2314 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2315 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2316 state->smb1.iov_count-2);
2317 wct_ofs = (wct_ofs + 3) & ~3;
2318 }
2319 return wct_ofs;
2320 }
2321
2322 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2323 {
2324 struct smbXcli_req_state *first_state =
2325 tevent_req_data(reqs[0],
2326 struct smbXcli_req_state);
2327 struct smbXcli_req_state *state;
2328 size_t wct_offset;
2329 size_t chain_padding = 0;
2330 int i, iovlen;
2331 struct iovec *iov = NULL;
2332 struct iovec *this_iov;
2333 NTSTATUS status;
2334 size_t nbt_len;
2335
2336 if (num_reqs == 1) {
2337 return smb1cli_req_writev_submit(reqs[0], first_state,
2338 first_state->smb1.iov,
2339 first_state->smb1.iov_count);
2340 }
2341
2342 iovlen = 0;
2343 for (i=0; i<num_reqs; i++) {
2344 if (!tevent_req_is_in_progress(reqs[i])) {
2345 return NT_STATUS_INTERNAL_ERROR;
2346 }
2347
2348 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2349
2350 if (state->smb1.iov_count < 4) {
2351 return NT_STATUS_INVALID_PARAMETER_MIX;
2352 }
2353
2354 if (i == 0) {
2355 /*
2356 * The NBT and SMB header
2357 */
2358 iovlen += 2;
2359 } else {
2360 /*
2361 * Chain padding
2362 */
2363 iovlen += 1;
2364 }
2365
2366 /*
2367 * words and bytes
2368 */
2369 iovlen += state->smb1.iov_count - 2;
2370 }
2371
2372 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2373 if (iov == NULL) {
2374 return NT_STATUS_NO_MEMORY;
2375 }
2376
2377 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2378 first_state, reqs, sizeof(*reqs) * num_reqs);
2379 if (first_state->smb1.chained_requests == NULL) {
2380 TALLOC_FREE(iov);
2381 return NT_STATUS_NO_MEMORY;
2382 }
2383
2384 wct_offset = HDR_WCT;
2385 this_iov = iov;
2386
2387 for (i=0; i<num_reqs; i++) {
2388 size_t next_padding = 0;
2389 uint16_t *vwv;
2390
2391 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2392
2393 if (i < num_reqs-1) {
2394 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2395 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2396 TALLOC_FREE(iov);
2397 TALLOC_FREE(first_state->smb1.chained_requests);
2398 return NT_STATUS_INVALID_PARAMETER_MIX;
2399 }
2400 }
2401
2402 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2403 state->smb1.iov_count-2) + 1;
2404 if ((wct_offset % 4) != 0) {
2405 next_padding = 4 - (wct_offset % 4);
2406 }
2407 wct_offset += next_padding;
2408 vwv = state->smb1.vwv;
2409
2410 if (i < num_reqs-1) {
2411 struct smbXcli_req_state *next_state =
2412 tevent_req_data(reqs[i+1],
2413 struct smbXcli_req_state);
2414 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2415 SCVAL(vwv+0, 1, 0);
2416 SSVAL(vwv+1, 0, wct_offset);
2417 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2418 /* properly end the chain */
2419 SCVAL(vwv+0, 0, 0xff);
2420 SCVAL(vwv+0, 1, 0xff);
2421 SSVAL(vwv+1, 0, 0);
2422 }
2423
2424 if (i == 0) {
2425 /*
2426 * The NBT and SMB header
2427 */
2428 this_iov[0] = state->smb1.iov[0];
2429 this_iov[1] = state->smb1.iov[1];
2430 this_iov += 2;
2431 } else {
2432 /*
2433 * This one is a bit subtle. We have to add
2434 * chain_padding bytes between the requests, and we
2435 * have to also include the wct field of the
2436 * subsequent requests. We use the subsequent header
2437 * for the padding, it contains the wct field in its
2438 * last byte.
2439 */
2440 this_iov[0].iov_len = chain_padding+1;
2441 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2442 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2443 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2444 this_iov += 1;
2445 }
2446
2447 /*
2448 * copy the words and bytes
2449 */
2450 memcpy(this_iov, state->smb1.iov+2,
2451 sizeof(struct iovec) * (state->smb1.iov_count-2));
2452 this_iov += state->smb1.iov_count - 2;
2453 chain_padding = next_padding;
2454 }
2455
2456 nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
2457 if (nbt_len > first_state->conn->smb1.max_xmit) {
2458 TALLOC_FREE(iov);
2459 TALLOC_FREE(first_state->smb1.chained_requests);
2460 return NT_STATUS_INVALID_PARAMETER_MIX;
2461 }
2462
2463 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2464 if (!NT_STATUS_IS_OK(status)) {
2465 TALLOC_FREE(iov);
2466 TALLOC_FREE(first_state->smb1.chained_requests);
2467 return status;
2468 }
2469
2470 return NT_STATUS_OK;
2471 }
2472
2473 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2474 {
2475 return ((tevent_queue_length(conn->outgoing) != 0)
2476 || (talloc_array_length(conn->pending) != 0));
2477 }
2478
2479 bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn)
2480 {
2481 if (conn->protocol >= PROTOCOL_SMB2_02) {
2482 return (smb2cli_conn_server_capabilities(conn) & SMB2_CAP_DFS);
2483 }
2484
2485 return (smb1cli_conn_capabilities(conn) & CAP_DFS);
2486 }
2487
2488 bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
2489 {
2490 uint16_t credits = 1;
2491
2492 if (conn->smb2.cur_credits == 0) {
2493 if (max_dyn_len != NULL) {
2494 *max_dyn_len = 0;
2495 }
2496 return false;
2497 }
2498
2499 if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2500 credits = conn->smb2.cur_credits;
2501 }
2502
2503 if (max_dyn_len != NULL) {
2504 *max_dyn_len = credits * 65536;
2505 }
2506
2507 return true;
2508 }
2509
2510 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2511 {
2512 return conn->smb2.server.capabilities;
2513 }
2514
2515 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2516 {
2517 return conn->smb2.server.security_mode;
2518 }
2519
2520 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2521 {
2522 return conn->smb2.server.max_trans_size;
2523 }
2524
2525 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2526 {
2527 return conn->smb2.server.max_read_size;
2528 }
2529
2530 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2531 {
2532 return conn->smb2.server.max_write_size;
2533 }
2534
2535 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2536 uint16_t max_credits)
2537 {
2538 conn->smb2.max_credits = max_credits;
2539 }
2540
2541 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2542
2543 static bool smb2cli_req_cancel(struct tevent_req *req)
2544 {
2545 struct smbXcli_req_state *state =
2546 tevent_req_data(req,
2547 struct smbXcli_req_state);
2548 uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2549 uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2550 uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
2551 struct smbXcli_tcon *tcon = state->tcon;
2552 struct smbXcli_session *session = state->session;
2553 uint8_t *fixed = state->smb2.pad;
2554 uint16_t fixed_len = 4;
2555 struct tevent_req *subreq;
2556 struct smbXcli_req_state *substate;
2557 NTSTATUS status;
2558
2559 SSVAL(fixed, 0, 0x04);
2560 SSVAL(fixed, 2, 0);
2561
2562 subreq = smb2cli_req_create(state, state->ev,
2563 state->conn,
2564 SMB2_OP_CANCEL,
2565 flags, 0,
2566 0, /* timeout */
2567 tcon, session,
2568 fixed, fixed_len,
2569 NULL, 0, 0);
2570 if (subreq == NULL) {
2571 return false;
2572 }
2573 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2574
2575 /*
2576 * clear everything but the SMB2_HDR_FLAG_ASYNC flag
2577 * e.g. if SMB2_HDR_FLAG_CHAINED is set we get INVALID_PARAMETER back
2578 */
2579 flags &= SMB2_HDR_FLAG_ASYNC;
2580
2581 if (flags & SMB2_HDR_FLAG_ASYNC) {
2582 mid = 0;
2583 }
2584
2585 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
2586 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2587 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
2588
2589 status = smb2cli_req_compound_submit(&subreq, 1);
2590 if (!NT_STATUS_IS_OK(status)) {
2591 TALLOC_FREE(subreq);
2592 return false;
2593 }
2594
2595 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2596
2597 return true;
2598 }
2599
2600 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2601 {
2602 /* we do not care about the result */
2603 TALLOC_FREE(subreq);
2604 }
2605
2606 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2607 struct tevent_context *ev,
2608 struct smbXcli_conn *conn,
2609 uint16_t cmd,
2610 uint32_t additional_flags,
2611 uint32_t clear_flags,
2612 uint32_t timeout_msec,
2613 struct smbXcli_tcon *tcon,
2614 struct smbXcli_session *session,
2615 const uint8_t *fixed,
2616 uint16_t fixed_len,
2617 const uint8_t *dyn,
2618 uint32_t dyn_len,
2619 uint32_t max_dyn_len)
2620 {
2621 struct tevent_req *req;
2622 struct smbXcli_req_state *state;
2623 uint32_t flags = 0;
2624 uint32_t tid = 0;
2625 uint64_t uid = 0;
2626 bool use_channel_sequence = false;
2627 uint16_t channel_sequence = 0;
2628
2629 req = tevent_req_create(mem_ctx, &state,
2630 struct smbXcli_req_state);
2631 if (req == NULL) {
2632 return NULL;
2633 }
2634
2635 state->ev = ev;
2636 state->conn = conn;
2637 state->session = session;
2638 state->tcon = tcon;
2639
2640 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2641 use_channel_sequence = true;
2642 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2643 use_channel_sequence = true;
2644 }
2645
2646 if (session) {
2647 uid = session->smb2->session_id;
2648
2649 if (use_channel_sequence) {
2650 channel_sequence = session->smb2->channel_sequence;
2651 }
2652
2653 state->smb2.should_sign = session->smb2->should_sign;
2654 state->smb2.should_encrypt = session->smb2->should_encrypt;
2655
2656 if (cmd == SMB2_OP_SESSSETUP &&
2657 session->smb2->signing_key.length != 0) {
2658 state->smb2.should_sign = true;
2659 }
2660
2661 if (cmd == SMB2_OP_SESSSETUP &&
2662 session->smb2_channel.signing_key.length == 0) {
2663 state->smb2.should_encrypt = false;
2664 }
2665 }
2666
2667 if (tcon) {
2668 tid = tcon->smb2.tcon_id;
2669
2670 if (tcon->smb2.should_encrypt) {
2671 state->smb2.should_encrypt = true;
2672 }
2673 }
2674
2675 if (state->smb2.should_encrypt) {
2676 state->smb2.should_sign = false;
2677 }
2678
2679 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2680 if (state->smb2.recv_iov == NULL) {
2681 TALLOC_FREE(req);
2682 return NULL;
2683 }
2684
2685 flags |= additional_flags;
2686 flags &= ~clear_flags;
2687
2688 state->smb2.fixed = fixed;
2689 state->smb2.fixed_len = fixed_len;
2690 state->smb2.dyn = dyn;
2691 state->smb2.dyn_len = dyn_len;
2692 state->smb2.max_dyn_len = max_dyn_len;
2693
2694 if (state->smb2.should_encrypt) {
2695 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2696 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2697 }
2698
2699 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
2700 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
2701 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
2702 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
2703 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
2704 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
2705 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
2706 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
2707
2708 switch (cmd) {
2709 case SMB2_OP_CANCEL:
2710 state->one_way = true;
2711 break;
2712 case SMB2_OP_BREAK:
2713 /*
2714 * If this is a dummy request, it will have
2715 * UINT64_MAX as message id.
2716 * If we send on break acknowledgement,
2717 * this gets overwritten later.
2718 */
2719 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2720 break;
2721 }
2722
2723 if (timeout_msec > 0) {
2724 struct timeval endtime;
2725
2726 endtime = timeval_current_ofs_msec(timeout_msec);
2727 if (!tevent_req_set_endtime(req, ev, endtime)) {
2728 return req;
2729 }
2730 }
2731
2732 return req;
2733 }
2734
2735 void smb2cli_req_set_notify_async(struct tevent_req *req)
2736 {
2737 struct smbXcli_req_state *state =
2738 tevent_req_data(req,
2739 struct smbXcli_req_state);
2740
2741 state->smb2.notify_async = true;
2742 }
2743
2744 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2745 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2746 TALLOC_CTX *tmp_mem,
2747 uint8_t *inbuf);
2748
2749 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2750 int num_reqs)
2751 {
2752 struct smbXcli_req_state *state;
2753 struct tevent_req *subreq;
2754 struct iovec *iov;
2755 int i, num_iov, nbt_len;
2756 int tf_iov = -1;
2757 const DATA_BLOB *encryption_key = NULL;
2758 uint64_t encryption_session_id = 0;
2759
2760 /*
2761 * 1 for the nbt length, optional TRANSFORM
2762 * per request: HDR, fixed, dyn, padding
2763 * -1 because the last one does not need padding
2764 */
2765
2766 iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
2767 if (iov == NULL) {
2768 return NT_STATUS_NO_MEMORY;
2769 }
2770
2771 num_iov = 1;
2772 nbt_len = 0;
2773
2774 /*
2775 * the session of the first request that requires encryption
2776 * specifies the encryption key.
2777 */
2778 for (i=0; i<num_reqs; i++) {
2779 if (!tevent_req_is_in_progress(reqs[i])) {
2780 return NT_STATUS_INTERNAL_ERROR;
2781 }
2782
2783 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2784
2785 if (!smbXcli_conn_is_connected(state->conn)) {
2786 return NT_STATUS_CONNECTION_DISCONNECTED;
2787 }
2788
2789 if ((state->conn->protocol != PROTOCOL_NONE) &&
2790 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2791 return NT_STATUS_REVISION_MISMATCH;
2792 }
2793
2794 if (state->session == NULL) {
2795 continue;
2796 }
2797
2798 if (!state->smb2.should_encrypt) {
2799 continue;
2800 }
2801
2802 encryption_key = &state->session->smb2->encryption_key;
2803 if (encryption_key->length == 0) {
2804 return NT_STATUS_INVALID_PARAMETER_MIX;
2805 }
2806
2807 encryption_session_id = state->session->smb2->session_id;
2808
2809 tf_iov = num_iov;
2810 iov[num_iov].iov_base = state->smb2.transform;
2811 iov[num_iov].iov_len = sizeof(state->smb2.transform);
2812 num_iov += 1;
2813
2814 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2815 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
2816 state->session->smb2->nonce_low);
2817 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
2818 state->session->smb2->nonce_high);
2819 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
2820 encryption_session_id);
2821
2822 state->session->smb2->nonce_low += 1;
2823 if (state->session->smb2->nonce_low == 0) {
2824 state->session->smb2->nonce_high += 1;
2825 state->session->smb2->nonce_low += 1;
2826 }
2827
2828 nbt_len += SMB2_TF_HDR_SIZE;
2829 break;
2830 }
2831
2832 for (i=0; i<num_reqs; i++) {
2833 int hdr_iov;
2834 size_t reqlen;
2835 bool ret;
2836 uint16_t opcode;
2837 uint64_t avail;
2838 uint16_t charge;
2839 uint16_t credits;
2840 uint64_t mid;
2841 const DATA_BLOB *signing_key = NULL;
2842
2843 if (!tevent_req_is_in_progress(reqs[i])) {
2844 return NT_STATUS_INTERNAL_ERROR;
2845 }
2846
2847 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2848
2849 if (!smbXcli_conn_is_connected(state->conn)) {
2850 return NT_STATUS_CONNECTION_DISCONNECTED;
2851 }
2852
2853 if ((state->conn->protocol != PROTOCOL_NONE) &&
2854 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2855 return NT_STATUS_REVISION_MISMATCH;
2856 }
2857
2858 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2859 if (opcode == SMB2_OP_CANCEL) {
2860 goto skip_credits;
2861 }
2862
2863 avail = UINT64_MAX - state->conn->smb2.mid;
2864 if (avail < 1) {
2865 return NT_STATUS_CONNECTION_ABORTED;
2866 }
2867
2868 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2869 uint32_t max_dyn_len = 1;
2870
2871 max_dyn_len = MAX(max_dyn_len, state->smb2.dyn_len);
2872 max_dyn_len = MAX(max_dyn_len, state->smb2.max_dyn_len);
2873
2874 charge = (max_dyn_len - 1)/ 65536 + 1;
2875 } else {
2876 charge = 1;
2877 }
2878
2879 charge = MAX(state->smb2.credit_charge, charge);
2880
2881 avail = MIN(avail, state->conn->smb2.cur_credits);
2882 if (avail < charge) {
2883 return NT_STATUS_INTERNAL_ERROR;
2884 }
2885
2886 credits = 0;
2887 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
2888 credits = state->conn->smb2.max_credits -
2889 state->conn->smb2.cur_credits;
2890 }
2891 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
2892 credits += 1;
2893 }
2894
2895 mid = state->conn->smb2.mid;
2896 state->conn->smb2.mid += charge;
2897 state->conn->smb2.cur_credits -= charge;
2898
2899 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2900 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
2901 }
2902 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
2903 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2904
2905 skip_credits:
2906 if (state->session && encryption_key == NULL) {
2907 /*
2908 * We prefer the channel signing key if it is
2909 * already there.
2910 */
2911 if (state->smb2.should_sign) {
2912 signing_key = &state->session->smb2_channel.signing_key;
2913 }
2914
2915 /*
2916 * If it is a channel binding, we already have the main
2917 * signing key and try that one.
2918 */
2919 if (signing_key && signing_key->length == 0) {
2920 signing_key = &state->session->smb2->signing_key;
2921 }
2922
2923 /*
2924 * If we do not have any session key yet, we skip the
2925 * signing of SMB2_OP_SESSSETUP requests.
2926 */
2927 if (signing_key && signing_key->length == 0) {
2928 signing_key = NULL;
2929 }
2930 }
2931
2932 hdr_iov = num_iov;
2933 iov[num_iov].iov_base = state->smb2.hdr;
2934 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
2935 num_iov += 1;
2936
2937 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2938 iov[num_iov].iov_len = state->smb2.fixed_len;
2939 num_iov += 1;
2940
2941 if (state->smb2.dyn != NULL) {
2942 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2943 iov[num_iov].iov_len = state->smb2.dyn_len;
2944 num_iov += 1;
2945 }
2946
2947 reqlen = sizeof(state->smb2.hdr);
2948 reqlen += state->smb2.fixed_len;
2949 reqlen += state->smb2.dyn_len;
2950
2951 if (i < num_reqs-1) {
2952 if ((reqlen % 8) > 0) {
2953 uint8_t pad = 8 - (reqlen % 8);
2954 iov[num_iov].iov_base = state->smb2.pad;
2955 iov[num_iov].iov_len = pad;
2956 num_iov += 1;
2957 reqlen += pad;
2958 }
2959 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
2960 }
2961
2962 state->smb2.encryption_session_id = encryption_session_id;
2963
2964 if (signing_key != NULL) {
2965 NTSTATUS status;
2966
2967 status = smb2_signing_sign_pdu(*signing_key,
2968 state->session->conn->protocol,
2969 &iov[hdr_iov], num_iov - hdr_iov);
2970 if (!NT_STATUS_IS_OK(status)) {
2971 return status;
2972 }
2973 }
2974
2975 nbt_len += reqlen;
2976
2977 ret = smbXcli_req_set_pending(reqs[i]);
2978 if (!ret) {
2979 return NT_STATUS_NO_MEMORY;
2980 }
2981 }
2982
2983 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
2984 _smb_setlen_tcp(state->length_hdr, nbt_len);
2985 iov[0].iov_base = state->length_hdr;
2986 iov[0].iov_len = sizeof(state->length_hdr);
2987
2988 if (encryption_key != NULL) {
2989 NTSTATUS status;
2990 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
2991 uint8_t *buf;
2992 int vi;
2993
2994 buf = talloc_array(iov, uint8_t, buflen);
2995 if (buf == NULL) {
2996 return NT_STATUS_NO_MEMORY;
2997 }
2998
2999 /*
3000 * We copy the buffers before encrypting them,
3001 * this is at least currently needed for the
3002 * to keep state->smb2.hdr.
3003 *
3004 * Also the callers may expect there buffers
3005 * to be const.
3006 */
3007 for (vi = tf_iov + 1; vi < num_iov; vi++) {
3008 struct iovec *v = &iov[vi];
3009 const uint8_t *o = (const uint8_t *)v->iov_base;
3010
3011 memcpy(buf, o, v->iov_len);
3012 v->iov_base = (void *)buf;
3013 buf += v->iov_len;
3014 }
3015
3016 status = smb2_signing_encrypt_pdu(*encryption_key,
3017 state->conn->protocol,
3018 &iov[tf_iov], num_iov - tf_iov);
3019 if (!NT_STATUS_IS_OK(status)) {
3020 return status;
3021 }
3022 }
3023
3024 if (state->conn->dispatch_incoming == NULL) {
3025 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3026 }
3027
3028 subreq = writev_send(state, state->ev, state->conn->outgoing,
3029 state->conn->write_fd, false, iov, num_iov);
3030 if (subreq == NULL) {
3031 return NT_STATUS_NO_MEMORY;
3032 }
3033 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
3034 return NT_STATUS_OK;
3035 }
3036
3037 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
3038 {
3039 struct smbXcli_req_state *state =
3040 tevent_req_data(req,
3041 struct smbXcli_req_state);
3042
3043 state->smb2.credit_charge = charge;
3044 }
3045
3046 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
3047 struct tevent_context *ev,
3048 struct smbXcli_conn *conn,
3049 uint16_t cmd,
3050 uint32_t additional_flags,
3051 uint32_t clear_flags,
3052 uint32_t timeout_msec,
3053 struct smbXcli_tcon *tcon,
3054 struct smbXcli_session *session,
3055 const uint8_t *fixed,
3056 uint16_t fixed_len,
3057 const uint8_t *dyn,
3058 uint32_t dyn_len,
3059 uint32_t max_dyn_len)
3060 {
3061 struct tevent_req *req;
3062 NTSTATUS status;
3063
3064 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
3065 additional_flags, clear_flags,
3066 timeout_msec,
3067 tcon, session,
3068 fixed, fixed_len,
3069 dyn, dyn_len,
3070 max_dyn_len);
3071 if (req == NULL) {
3072 return NULL;
3073 }
3074 if (!tevent_req_is_in_progress(req)) {
3075 return tevent_req_post(req, ev);
3076 }
3077 status = smb2cli_req_compound_submit(&req, 1);
3078 if (tevent_req_nterror(req, status)) {
3079 return tevent_req_post(req, ev);
3080 }
3081 return req;
3082 }
3083
3084 static void smb2cli_req_writev_done(struct tevent_req *subreq)
3085 {
3086 struct tevent_req *req =
3087 tevent_req_callback_data(subreq,
3088 struct tevent_req);
3089 struct smbXcli_req_state *state =
3090 tevent_req_data(req,
3091 struct smbXcli_req_state);
3092 ssize_t nwritten;
3093 int err;
3094
3095 nwritten = writev_recv(subreq, &err);
3096 TALLOC_FREE(subreq);
3097 if (nwritten == -1) {
3098 /* here, we need to notify all pending requests */
3099 NTSTATUS status = map_nt_error_from_unix_common(err);
3100 smbXcli_conn_disconnect(state->conn, status);
3101 return;
3102 }
3103 }
3104
3105 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3106 uint8_t *buf,
3107 size_t buflen,
3108 TALLOC_CTX *mem_ctx,
3109 struct iovec **piov, int *pnum_iov)
3110 {
3111 struct iovec *iov;
3112 int num_iov = 0;
3113 size_t taken = 0;
3114 uint8_t *first_hdr = buf;
3115 size_t verified_buflen = 0;
3116 uint8_t *tf = NULL;
3117 size_t tf_len = 0;
3118
3119 iov = talloc_array(mem_ctx, struct iovec, num_iov);
3120 if (iov == NULL) {
3121 return NT_STATUS_NO_MEMORY;
3122 }
3123
3124 while (taken < buflen) {
3125 size_t len = buflen - taken;
3126 uint8_t *hdr = first_hdr + taken;
3127 struct iovec *cur;
3128 size_t full_size;
3129 size_t next_command_ofs;
3130 uint16_t body_size;
3131 struct iovec *iov_tmp;
3132
3133 if (verified_buflen > taken) {
3134 len = verified_buflen - taken;
3135 } else {
3136 tf = NULL;
3137 tf_len = 0;
3138 }
3139
3140 if (len < 4) {
3141 DEBUG(10, ("%d bytes left, expected at least %d\n",
3142 (int)len, 4));
3143 goto inval;
3144 }
3145 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3146 struct smbXcli_session *s;
3147 uint64_t uid;
3148 struct iovec tf_iov[2];
3149 size_t enc_len;
3150 NTSTATUS status;
3151
3152 if (len < SMB2_TF_HDR_SIZE) {
3153 DEBUG(10, ("%d bytes left, expected at least %d\n",
3154 (int)len, SMB2_TF_HDR_SIZE));
3155 goto inval;
3156 }
3157 tf = hdr;
3158 tf_len = SMB2_TF_HDR_SIZE;
3159 taken += tf_len;
3160
3161 hdr = first_hdr + taken;
3162 enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3163 uid = BVAL(tf, SMB2_TF_SESSION_ID);
3164
3165 if (len < SMB2_TF_HDR_SIZE + enc_len) {
3166 DEBUG(10, ("%d bytes left, expected at least %d\n",
3167 (int)len,
3168 (int)(SMB2_TF_HDR_SIZE + enc_len)));
3169 goto inval;
3170 }
3171
3172 s = conn->sessions;
3173 for (; s; s = s->next) {
3174 if (s->smb2->session_id != uid) {
3175 continue;
3176 }
3177 break;
3178 }
3179
3180 if (s == NULL) {
3181 DEBUG(10, ("unknown session_id %llu\n",
3182 (unsigned long long)uid));
3183 goto inval;
3184 }
3185
3186 tf_iov[0].iov_base = (void *)tf;
3187 tf_iov[0].iov_len = tf_len;
3188 tf_iov[1].iov_base = (void *)hdr;
3189 tf_iov[1].iov_len = enc_len;
3190
3191 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3192 conn->protocol,
3193 tf_iov, 2);
3194 if (!NT_STATUS_IS_OK(status)) {
3195 TALLOC_FREE(iov);
3196 return status;
3197 }
3198
3199 verified_buflen = taken + enc_len;
3200 len = enc_len;
3201 }
3202
3203 /*
3204 * We need the header plus the body length field
3205 */
3206
3207 if (len < SMB2_HDR_BODY + 2) {
3208 DEBUG(10, ("%d bytes left, expected at least %d\n",
3209 (int)len, SMB2_HDR_BODY));
3210 goto inval;
3211 }
3212 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3213 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3214 IVAL(hdr, 0)));
3215 goto inval;
3216 }
3217 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3218 DEBUG(10, ("Got HDR len %d, expected %d\n",
3219 SVAL(hdr, 4), SMB2_HDR_BODY));
3220 goto inval;
3221 }
3222
3223 full_size = len;
3224 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3225 body_size = SVAL(hdr, SMB2_HDR_BODY);
3226
3227 if (next_command_ofs != 0) {
3228 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3229 goto inval;
3230 }
3231 if (next_command_ofs > full_size) {
3232 goto inval;
3233 }
3234 full_size = next_command_ofs;
3235 }
3236 if (body_size < 2) {
3237 goto inval;
3238 }
3239 body_size &= 0xfffe;
3240
3241 if (body_size > (full_size - SMB2_HDR_BODY)) {
3242 goto inval;
3243 }
3244
3245 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3246 num_iov + 4);
3247 if (iov_tmp == NULL) {
3248 TALLOC_FREE(iov);
3249 return NT_STATUS_NO_MEMORY;
3250 }
3251 iov = iov_tmp;
3252 cur = &iov[num_iov];
3253 num_iov += 4;
3254
3255 cur[0].iov_base = tf;
3256 cur[0].iov_len = tf_len;
3257 cur[1].iov_base = hdr;
3258 cur[1].iov_len = SMB2_HDR_BODY;
3259 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3260 cur[2].iov_len = body_size;
3261 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3262 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3263
3264 taken += full_size;
3265 }
3266
3267 *piov = iov;
3268 *pnum_iov = num_iov;
3269 return NT_STATUS_OK;
3270
3271 inval:
3272 TALLOC_FREE(iov);
3273 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3274 }
3275
3276 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3277 uint64_t mid)
3278 {
3279 size_t num_pending = talloc_array_length(conn->pending);
3280 size_t i;
3281
3282 for (i=0; i<num_pending; i++) {
3283 struct tevent_req *req = conn->pending[i];
3284 struct smbXcli_req_state *state =
3285 tevent_req_data(req,
3286 struct smbXcli_req_state);
3287
3288 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3289 return req;
3290 }
3291 }
3292 return NULL;
3293 }
3294
3295 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3296 TALLOC_CTX *tmp_mem,
3297 uint8_t *inbuf)
3298 {
3299 struct tevent_req *req;
3300 struct smbXcli_req_state *state = NULL;
3301 struct iovec *iov;
3302 int i, num_iov;
3303 NTSTATUS status;
3304 bool defer = true;
3305 struct smbXcli_session *last_session = NULL;
3306 size_t inbuf_len = smb_len_tcp(inbuf);
3307
3308 status = smb2cli_inbuf_parse_compound(conn,
3309 inbuf + NBT_HDR_SIZE,
3310 inbuf_len,
3311 tmp_mem,
3312 &iov, &num_iov);
3313 if (!NT_STATUS_IS_OK(status)) {
3314 return status;
3315 }
3316
3317 for (i=0; i<num_iov; i+=4) {
3318 uint8_t *inbuf_ref = NULL;
3319 struct iovec *cur = &iov[i];
3320 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3321 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3322 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3323 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3324 uint16_t req_opcode;
3325 uint32_t req_flags;
3326 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3327 uint32_t new_credits;
3328 struct smbXcli_session *session = NULL;
3329 const DATA_BLOB *signing_key = NULL;
3330 bool was_encrypted = false;
3331
3332 new_credits = conn->smb2.cur_credits;
3333 new_credits += credits;
3334 if (new_credits > UINT16_MAX) {
3335 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3336 }
3337 conn->smb2.cur_credits += credits;
3338
3339 req = smb2cli_conn_find_pending(conn, mid);
3340 if (req == NULL) {
3341 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3342 }
3343 state = tevent_req_data(req, struct smbXcli_req_state);
3344
3345 state->smb2.got_async = false;
3346
3347 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3348 if (opcode != req_opcode) {
3349 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3350 }
3351 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3352
3353 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3354 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3355 }
3356
3357 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3358 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3359 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3360 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3361
3362 /*
3363 * async interim responses are not signed,
3364 * even if the SMB2_HDR_FLAG_SIGNED flag
3365 * is set.
3366 */
3367 req_flags |= SMB2_HDR_FLAG_ASYNC;
3368 SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
3369 SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
3370
3371 if (state->smb2.notify_async) {
3372 state->smb2.got_async = true;
3373 tevent_req_defer_callback(req, state->ev);
3374 tevent_req_notify_callback(req);
3375 }
3376 continue;
3377 }
3378
3379 session = state->session;
3380 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3381 session = last_session;
3382 }
3383 last_session = session;
3384
3385 if (state->smb2.should_sign) {
3386 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3387 return NT_STATUS_ACCESS_DENIED;
3388 }
3389 }
3390
3391 if (flags & SMB2_HDR_FLAG_SIGNED) {
3392 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3393
3394 if (session == NULL) {
3395 struct smbXcli_session *s;
3396
3397 s = state->conn->sessions;
3398 for (; s; s = s->next) {
3399 if (s->smb2->session_id != uid) {
3400 continue;
3401 }
3402
3403 session = s;
3404 break;
3405 }
3406 }
3407
3408 if (session == NULL) {
3409 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3410 }
3411
3412 last_session = session;
3413 signing_key = &session->smb2_channel.signing_key;
3414 }
3415
3416 if (opcode == SMB2_OP_SESSSETUP) {
3417 /*
3418 * We prefer the channel signing key, if it is
3419 * already there.
3420 *
3421 * If we do not have a channel signing key yet,
3422 * we try the main signing key, if it is not
3423 * the final response.
3424 */
3425 if (signing_key && signing_key->length == 0 &&
3426 !NT_STATUS_IS_OK(status)) {
3427 signing_key = &session->smb2->signing_key;
3428 }
3429
3430 if (signing_key && signing_key->length == 0) {
3431 /*
3432 * If we do not have a session key to
3433 * verify the signature, we defer the
3434 * signing check to the caller.
3435 *
3436 * The caller gets NT_STATUS_OK, it
3437 * has to call
3438 * smb2cli_session_set_session_key()
3439 * or
3440 * smb2cli_session_set_channel_key()
3441 * which will check the signature
3442 * with the channel signing key.
3443 */
3444 signing_key = NULL;
3445 }
3446 }
3447
3448 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3449 const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3450 uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3451
3452 /*
3453 * If the response was encrypted in a SMB2_TRANSFORM
3454 * pdu, which belongs to the correct session,
3455 * we do not need to do signing checks
3456 *
3457 * It could be the session the response belongs to
3458 * or the session that was used to encrypt the
3459 * SMB2_TRANSFORM request.
3460 */
3461 if ((session && session->smb2->session_id == uid) ||
3462 (state->smb2.encryption_session_id == uid)) {
3463 signing_key = NULL;
3464 was_encrypted = true;
3465 }
3466 }
3467
3468 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3469 /*
3470 * if the server returns NT_STATUS_USER_SESSION_DELETED
3471 * the response is not signed and we should
3472 * propagate the NT_STATUS_USER_SESSION_DELETED
3473 * status to the caller.
3474 */
3475 state->smb2.signing_skipped = true;
3476 signing_key = NULL;
3477 }
3478
3479 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3480 /*
3481 * if the server returns
3482 * NT_STATUS_INVALID_PARAMETER
3483 * the response might not be encrypted.
3484 */
3485 if (state->smb2.should_encrypt && !was_encrypted) {
3486 state->smb2.signing_skipped = true;
3487 signing_key = NULL;
3488 }
3489 }
3490
3491 if (state->smb2.should_encrypt && !was_encrypted) {
3492 if (!state->smb2.signing_skipped) {
3493 return NT_STATUS_ACCESS_DENIED;
3494 }
3495 }
3496
3497 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3498 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3499 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3500 /*
3501 * if the server returns
3502 * NT_STATUS_NETWORK_NAME_DELETED
3503 * NT_STATUS_FILE_CLOSED
3504 * NT_STATUS_INVALID_PARAMETER
3505 * the response might not be signed
3506 * as this happens before the signing checks.
3507 *
3508 * If server echos the signature (or all zeros)
3509 * we should report the status from the server
3510 * to the caller.
3511 */
3512 if (signing_key) {
3513 int cmp;
3514
3515 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3516 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3517 16);
3518 if (cmp == 0) {
3519 state->smb2.signing_skipped = true;
3520 signing_key = NULL;
3521 }
3522 }
3523 if (signing_key) {
3524 int cmp;
3525 static const uint8_t zeros[16];
3526
3527 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3528 zeros,
3529 16);
3530 if (cmp == 0) {
3531 state->smb2.signing_skipped = true;
3532 signing_key = NULL;
3533 }
3534 }
3535 }
3536
3537 if (signing_key) {
3538 status = smb2_signing_check_pdu(*signing_key,
3539 state->conn->protocol,
3540 &cur[1], 3);
3541 if (!NT_STATUS_IS_OK(status)) {
3542 /*
3543 * If the signing check fails, we disconnect
3544 * the connection.
3545 */
3546 return status;
3547 }
3548 }
3549
3550 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
3551 (session != NULL) && session->disconnect_expired)
3552 {
3553 /*
3554 * this should be a short term hack
3555 * until the upper layers have implemented
3556 * re-authentication.
3557 */
3558 return status;
3559 }
3560
3561 smbXcli_req_unset_pending(req);
3562
3563 /*
3564 * There might be more than one response
3565 * we need to defer the notifications
3566 */
3567 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3568 defer = false;
3569 }
3570
3571 if (defer) {
3572 tevent_req_defer_callback(req, state->ev);
3573 }
3574
3575 /*
3576 * Note: here we use talloc_reference() in a way
3577 * that does not expose it to the caller.
3578 */
3579 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3580 if (tevent_req_nomem(inbuf_ref, req)) {
3581 continue;
3582 }
3583
3584 /* copy the related buffers */
3585 state->smb2.recv_iov[0] = cur[1];
3586 state->smb2.recv_iov[1] = cur[2];
3587 state->smb2.recv_iov[2] = cur[3];
3588
3589 tevent_req_done(req);
3590 }
3591
3592 if (defer) {
3593 return NT_STATUS_RETRY;
3594 }
3595
3596 return NT_STATUS_OK;
3597 }
3598
3599 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3600 struct iovec **piov,
3601 const struct smb2cli_req_expected_response *expected,
3602 size_t num_expected)
3603 {
3604 struct smbXcli_req_state *state =
3605 tevent_req_data(req,
3606 struct smbXcli_req_state);
3607 NTSTATUS status;
3608 size_t body_size;
3609 bool found_status = false;
3610 bool found_size = false;
3611 size_t i;
3612
3613 if (piov != NULL) {
3614 *piov = NULL;
3615 }
3616
3617 if (state->smb2.got_async) {
3618 return STATUS_PENDING;
3619 }
3620
3621 if (tevent_req_is_nterror(req, &status)) {
3622 for (i=0; i < num_expected; i++) {
3623 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3624 found_status = true;
3625 break;
3626 }
3627 }
3628
3629 if (found_status) {
3630 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3631 }
3632
3633 return status;
3634 }
3635
3636 if (num_expected == 0) {
3637 found_status = true;
3638 found_size = true;
3639 }
3640
3641 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3642 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3643
3644 for (i=0; i < num_expected; i++) {
3645 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3646 continue;
3647 }
3648
3649 found_status = true;
3650 if (expected[i].body_size == 0) {
3651 found_size = true;
3652 break;
3653 }
3654
3655 if (expected[i].body_size == body_size) {
3656 found_size = true;
3657 break;
3658 }
3659 }
3660
3661 if (!found_status) {
3662 return status;
3663 }
3664
3665 if (state->smb2.signing_skipped) {
3666 if (num_expected > 0) {
3667 return NT_STATUS_ACCESS_DENIED;
3668 }
3669 if (!NT_STATUS_IS_ERR(status)) {
3670 return NT_STATUS_ACCESS_DENIED;
3671 }
3672 }
3673
3674 if (!found_size) {
3675 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3676 }
3677
3678 if (piov != NULL) {
3679 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3680 }
3681
3682 return status;
3683 }
3684
3685 static const struct {
3686 enum protocol_types proto;
3687 const char *smb1_name;
3688 } smb1cli_prots[] = {
3689 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
3690 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
3691 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
3692 {PROTOCOL_LANMAN1, "LANMAN1.0"},
3693 {PROTOCOL_LANMAN2, "LM1.2X002"},
3694 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
3695 {PROTOCOL_LANMAN2, "LANMAN2.1"},
3696 {PROTOCOL_LANMAN2, "Samba"},
3697 {PROTOCOL_NT1, "NT LANMAN 1.0"},
3698 {PROTOCOL_NT1, "NT LM 0.12"},
3699 {PROTOCOL_SMB2_02, "SMB 2.002"},
3700 {PROTOCOL_SMB2_10, "SMB 2.???"},
3701 };
3702
3703 static const struct {
3704 enum protocol_types proto;
3705 uint16_t smb2_dialect;
3706 } smb2cli_prots[] = {
3707 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
3708 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
3709 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
3710 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
3711 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
3712 };
3713
3714 struct smbXcli_negprot_state {
3715 struct smbXcli_conn *conn;
3716 struct tevent_context *ev;
3717 uint32_t timeout_msec;
3718 enum protocol_types min_protocol;
3719 enum protocol_types max_protocol;
3720
3721 struct {
3722 uint8_t fixed[36];
3723 uint8_t dyn[ARRAY_SIZE(smb2cli_prots)*2];
3724 } smb2;
3725 };
3726
3727 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3728 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3729 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3730 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3731 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3732 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3733 TALLOC_CTX *frame,
3734 uint8_t *inbuf);
3735
3736 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3737 struct tevent_context *ev,
3738 struct smbXcli_conn *conn,
3739 uint32_t timeout_msec,
3740 enum protocol_types min_protocol,
3741 enum protocol_types max_protocol)
3742 {
3743 struct tevent_req *req, *subreq;
3744 struct smbXcli_negprot_state *state;
3745
3746 req = tevent_req_create(mem_ctx, &state,
3747 struct smbXcli_negprot_state);
3748 if (req == NULL) {
3749 return NULL;
3750 }
3751 state->conn = conn;
3752 state->ev = ev;
3753 state->timeout_msec = timeout_msec;
3754 state->min_protocol = min_protocol;
3755 state->max_protocol = max_protocol;
3756
3757 if (min_protocol == PROTOCOL_NONE) {
3758 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3759 return tevent_req_post(req, ev);
3760 }
3761
3762 if (max_protocol == PROTOCOL_NONE) {
3763 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3764 return tevent_req_post(req, ev);
3765 }
3766
3767 if (min_protocol > max_protocol) {
3768 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3769 return tevent_req_post(req, ev);
3770 }
3771
3772 if ((min_protocol < PROTOCOL_SMB2_02) &&
3773 (max_protocol < PROTOCOL_SMB2_02)) {
3774 /*
3775 * SMB1 only...
3776 */
3777 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3778
3779 subreq = smbXcli_negprot_smb1_subreq(state);
3780 if (tevent_req_nomem(subreq, req)) {
3781 return tevent_req_post(req, ev);
3782 }
3783 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3784 return req;
3785 }
3786
3787 if ((min_protocol >= PROTOCOL_SMB2_02) &&
3788 (max_protocol >= PROTOCOL_SMB2_02)) {
3789 /*
3790 * SMB2 only...
3791 */
3792 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3793
3794 subreq = smbXcli_negprot_smb2_subreq(state);
3795 if (tevent_req_nomem(subreq, req)) {
3796 return tevent_req_post(req, ev);
3797 }
3798 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3799 return req;
3800 }
3801
3802 /*
3803 * We send an SMB1 negprot with the SMB2 dialects
3804 * and expect a SMB1 or a SMB2 response.
3805 *
3806 * smbXcli_negprot_dispatch_incoming() will fix the
3807 * callback to match protocol of the response.
3808 */
3809 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
3810
3811 subreq = smbXcli_negprot_smb1_subreq(state);
3812 if (tevent_req_nomem(subreq, req)) {
3813 return tevent_req_post(req, ev);
3814 }
3815 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
3816 return req;
3817 }
3818
3819 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
3820 {
3821 struct tevent_req *req =
3822 tevent_req_callback_data(subreq,
3823 struct tevent_req);
3824 NTSTATUS status;
3825
3826 /*
3827 * we just want the low level error
3828 */
3829 status = tevent_req_simple_recv_ntstatus(subreq);
3830 TALLOC_FREE(subreq);
3831 if (tevent_req_nterror(req, status)) {
3832 return;
3833 }
3834
3835 /* this should never happen */
3836 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
3837 }
3838
3839 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
3840 {
3841 size_t i;
3842 DATA_BLOB bytes = data_blob_null;
3843 uint8_t flags;
3844 uint16_t flags2;
3845
3846 /* setup the protocol strings */
3847 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3848 uint8_t c = 2;
3849 bool ok;
3850
3851 if (smb1cli_prots[i].proto < state->min_protocol) {
3852 continue;
3853 }
3854
3855 if (smb1cli_prots[i].proto > state->max_protocol) {
3856 continue;
3857 }
3858
3859 ok = data_blob_append(state, &bytes, &c, sizeof(c));
3860 if (!ok) {
3861 return NULL;
3862 }
3863
3864 /*
3865 * We now it is already ascii and
3866 * we want NULL termination.
3867 */
3868 ok = data_blob_append(state, &bytes,
3869 smb1cli_prots[i].smb1_name,
3870 strlen(smb1cli_prots[i].smb1_name)+1);
3871 if (!ok) {
3872 return NULL;
3873 }
3874 }
3875
3876 smb1cli_req_flags(state->max_protocol,
3877 state->conn->smb1.client.capabilities,
3878 SMBnegprot,
3879 0, 0, &flags,
3880 0, 0, &flags2);
3881
3882 return smb1cli_req_send(state, state->ev, state->conn,
3883 SMBnegprot,
3884 flags, ~flags,
3885 flags2, ~flags2,
3886 state->timeout_msec,
3887 0xFFFE, 0, NULL, /* pid, tid, session */
3888 0, NULL, /* wct, vwv */
3889 bytes.length, bytes.data);
3890 }
3891
3892 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
3893 {
3894 struct tevent_req *req =
3895 tevent_req_callback_data(subreq,
3896 struct tevent_req);
3897 struct smbXcli_negprot_state *state =
3898 tevent_req_data(req,
3899 struct smbXcli_negprot_state);
3900 struct smbXcli_conn *conn = state->conn;
3901 struct iovec *recv_iov = NULL;
3902 uint8_t *inhdr;
3903 uint8_t wct;
3904 uint16_t *vwv;
3905 uint32_t num_bytes;
3906 uint8_t *bytes;
3907 NTSTATUS status;
3908 uint16_t protnum;
3909 size_t i;
3910 size_t num_prots = 0;
3911 uint8_t flags;
3912 uint32_t client_capabilities = conn->smb1.client.capabilities;
3913 uint32_t both_capabilities;
3914 uint32_t server_capabilities = 0;
3915 uint32_t capabilities;
3916 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
3917 uint32_t server_max_xmit = 0;
3918 uint32_t max_xmit;
3919 uint32_t server_max_mux = 0;
3920 uint16_t server_security_mode = 0;
3921 uint32_t server_session_key = 0;
3922 bool server_readbraw = false;
3923 bool server_writebraw = false;
3924 bool server_lockread = false;
3925 bool server_writeunlock = false;
3926 struct GUID server_guid = GUID_zero();
3927 DATA_BLOB server_gss_blob = data_blob_null;
3928 uint8_t server_challenge[8];
3929 char *server_workgroup = NULL;
3930 char *server_name = NULL;
3931 int server_time_zone = 0;
3932 NTTIME server_system_time = 0;
3933 static const struct smb1cli_req_expected_response expected[] = {
3934 {
3935 .status = NT_STATUS_OK,
3936 .wct = 0x11, /* NT1 */
3937 },
3938 {
3939 .status = NT_STATUS_OK,
3940 .wct = 0x0D, /* LM */
3941 },
3942 {
3943 .status = NT_STATUS_OK,
3944 .wct = 0x01, /* CORE */
3945 }
3946 };
3947
3948 ZERO_STRUCT(server_challenge);
3949
3950 status = smb1cli_req_recv(subreq, state,
3951 &recv_iov,
3952 &inhdr,
3953 &wct,
3954 &vwv,
3955 NULL, /* pvwv_offset */
3956 &num_bytes,
3957 &bytes,
3958 NULL, /* pbytes_offset */
3959 NULL, /* pinbuf */
3960 expected, ARRAY_SIZE(expected));
3961 TALLOC_FREE(subreq);
3962 if (tevent_req_nterror(req, status)) {
3963 return;
3964 }
3965
3966 flags = CVAL(inhdr, HDR_FLG);
3967
3968 protnum = SVAL(vwv, 0);
3969
3970 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3971 if (smb1cli_prots[i].proto < state->min_protocol) {
3972 continue;
3973 }
3974
3975 if (smb1cli_prots[i].proto > state->max_protocol) {
3976 continue;
3977 }
3978
3979 if (protnum != num_prots) {
3980 num_prots++;
3981 continue;
3982 }
3983
3984 conn->protocol = smb1cli_prots[i].proto;
3985 break;
3986 }
3987
3988 if (conn->protocol == PROTOCOL_NONE) {
3989 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3990 return;
3991 }
3992
3993 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
3994 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
3995 "and the selected protocol level doesn't support it.\n"));
3996 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3997 return;
3998 }
3999
4000 if (flags & FLAG_SUPPORT_LOCKREAD) {
4001 server_lockread = true;
4002 server_writeunlock = true;
4003 }
4004
4005 if (conn->protocol >= PROTOCOL_NT1) {
4006 const char *client_signing = NULL;
4007 bool server_mandatory = false;
4008 bool server_allowed = false;
4009 const char *server_signing = NULL;
4010 bool ok;
4011 uint8_t key_len;
4012
4013 if (wct != 0x11) {
4014 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4015 return;
4016 }
4017
4018 /* NT protocol */
4019 server_security_mode = CVAL(vwv + 1, 0);
4020 server_max_mux = SVAL(vwv + 1, 1);
4021 server_max_xmit = IVAL(vwv + 3, 1);
4022 server_session_key = IVAL(vwv + 7, 1);
4023 server_time_zone = SVALS(vwv + 15, 1);
4024 server_time_zone *= 60;
4025 /* this time arrives in real GMT */
4026 server_system_time = BVAL(vwv + 11, 1);
4027 server_capabilities = IVAL(vwv + 9, 1);
4028
4029 key_len = CVAL(vwv + 16, 1);
4030
4031 if (server_capabilities & CAP_RAW_MODE) {
4032 server_readbraw = true;
4033 server_writebraw = true;
4034 }
4035 if (server_capabilities & CAP_LOCK_AND_READ) {
4036 server_lockread = true;
4037 }
4038
4039 if (server_capabilities & CAP_EXTENDED_SECURITY) {
4040 DATA_BLOB blob1, blob2;
4041
4042 if (num_bytes < 16) {
4043 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4044 return;
4045 }
4046
4047 blob1 = data_blob_const(bytes, 16);
4048 status = GUID_from_data_blob(&blob1, &server_guid);
4049 if (tevent_req_nterror(req, status)) {
4050 return;
4051 }
4052
4053 blob1 = data_blob_const(bytes+16, num_bytes-16);
4054 blob2 = data_blob_dup_talloc(state, blob1);
4055 if (blob1.length > 0 &&
4056 tevent_req_nomem(blob2.data, req)) {
4057 return;
4058 }
4059 server_gss_blob = blob2;
4060 } else {
4061 DATA_BLOB blob1, blob2;
4062
4063 if (num_bytes < key_len) {
4064 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4065 return;
4066 }
4067
4068 if (key_len != 0 && key_len != 8) {
4069 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4070 return;
4071 }
4072
4073 if (key_len == 8) {
4074 memcpy(server_challenge, bytes, 8);
4075 }
4076
4077 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4078 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
4079 if (blob1.length > 0) {
4080 size_t len;
4081
4082 len = utf16_len_n(blob1.data,
4083 blob1.length);
4084 blob1.length = len;
4085
4086 ok = convert_string_talloc(state,
4087 CH_UTF16LE,
4088 CH_UNIX,
4089 blob1.data,
4090 blob1.length,
4091 &server_workgroup,
4092 &len);
4093 if (!ok) {
4094 status = map_nt_error_from_unix_common(errno);
4095 tevent_req_nterror(req, status);
4096 return;
4097 }
4098 }
4099
4100 blob2.data += blob1.length;
4101 blob2.length -= blob1.length;
4102 if (blob2.length > 0) {
4103 size_t len;
4104
4105 len = utf16_len_n(blob1.data,
4106 blob1.length);
4107 blob1.length = len;
4108
4109 ok = convert_string_talloc(state,
4110 CH_UTF16LE,
4111 CH_UNIX,
4112 blob2.data,
4113 blob2.length,
4114 &server_name,
4115 &len);
4116 if (!ok) {
4117 status = map_nt_error_from_unix_common(errno);
4118 tevent_req_nterror(req, status);
4119 return;
4120 }
4121 }
4122 }
4123
4124 client_signing = "disabled";
4125 if (conn->allow_signing) {
4126 client_signing = "allowed";
4127 }
4128 if (conn->mandatory_signing) {
4129 client_signing = "required";
4130 }
4131
4132 server_signing = "not supported";
4133 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4134 server_signing = "supported";
4135 server_allowed = true;
4136 } else if (conn->mandatory_signing) {
4137 /*
4138 * We have mandatory signing as client
4139 * lets assume the server will look at our
4140 * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4141 * flag in the session setup
4142 */
4143 server_signing = "not announced";
4144 server_allowed = true;
4145 }
4146 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4147 server_signing = "required";
4148 server_mandatory = true;
4149 }
4150
4151 ok = smb_signing_set_negotiated(conn->smb1.signing,
4152 server_allowed,
4153 server_mandatory);
4154 if (!ok) {
4155 DEBUG(1,("cli_negprot: SMB signing is required, "
4156 "but client[%s] and server[%s] mismatch\n",
4157 client_signing, server_signing));
4158 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4159 return;
4160 }
4161
4162 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4163 DATA_BLOB blob1;
4164 uint8_t key_len;
4165 time_t t;
4166
4167 if (wct != 0x0D) {
4168 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4169 return;
4170 }
4171
4172 server_security_mode = SVAL(vwv + 1, 0);
4173 server_max_xmit = SVAL(vwv + 2, 0);
4174 server_max_mux = SVAL(vwv + 3, 0);
4175 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4176 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4177 server_session_key = IVAL(vwv + 6, 0);
4178 server_time_zone = SVALS(vwv + 10, 0);
4179 server_time_zone *= 60;
4180 /* this time is converted to GMT by make_unix_date */
4181 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4182 unix_to_nt_time(&server_system_time, t);
4183 key_len = SVAL(vwv + 11, 0);
4184
4185 if (num_bytes < key_len) {
4186 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4187 return;
4188 }
4189
4190 if (key_len != 0 && key_len != 8) {
4191 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4192 return;
4193 }
4194
4195 if (key_len == 8) {
4196 memcpy(server_challenge, bytes, 8);
4197 }
4198
4199 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4200 if (blob1.length > 0) {
4201 size_t len;
4202 bool ok;
4203
4204 len = utf16_len_n(blob1.data,
4205 blob1.length);
4206 blob1.length = len;
4207
4208 ok = convert_string_talloc(state,
4209 CH_DOS,
4210 CH_UNIX,
4211 blob1.data,
4212 blob1.length,
4213 &server_workgroup,
4214 &len);
4215 if (!ok) {
4216 status = map_nt_error_from_unix_common(errno);
4217 tevent_req_nterror(req, status);
4218 return;
4219 }
4220 }
4221
4222 } else {
4223 /* the old core protocol */
4224 server_time_zone = get_time_zone(time(NULL));
4225 server_max_xmit = 1024;
4226 server_max_mux = 1;
4227 }
4228
4229 if (server_max_xmit < 1024) {
4230 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4231 return;
4232 }
4233
4234 if (server_max_mux < 1) {
4235 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4236 return;
4237 }
4238
4239 /*
4240 * Now calculate the negotiated capabilities
4241 * based on the mask for:
4242 * - client only flags
4243 * - flags used in both directions
4244 * - server only flags
4245 */
4246 both_capabilities = client_capabilities & server_capabilities;
4247 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4248 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4249 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4250
4251 max_xmit = MIN(client_max_xmit, server_max_xmit);
4252
4253 conn->smb1.server.capabilities = server_capabilities;
4254 conn->smb1.capabilities = capabilities;
4255
4256 conn->smb1.server.max_xmit = server_max_xmit;
4257 conn->smb1.max_xmit = max_xmit;
4258
4259 conn->smb1.server.max_mux = server_max_mux;
4260
4261 conn->smb1.server.security_mode = server_security_mode;
4262
4263 conn->smb1.server.readbraw = server_readbraw;
4264 conn->smb1.server.writebraw = server_writebraw;
4265 conn->smb1.server.lockread = server_lockread;
4266 conn->smb1.server.writeunlock = server_writeunlock;
4267
4268 conn->smb1.server.session_key = server_session_key;
4269
4270 talloc_steal(conn, server_gss_blob.data);
4271 conn->smb1.server.gss_blob = server_gss_blob;
4272 conn->smb1.server.guid = server_guid;
4273 memcpy(conn->smb1.server.challenge, server_challenge, 8);
4274 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4275 conn->smb1.server.name = talloc_move(conn, &server_name);
4276
4277 conn->smb1.server.time_zone = server_time_zone;
4278 conn->smb1.server.system_time = server_system_time;
4279
4280 tevent_req_done(req);
4281 }
4282
4283 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4284 {
4285 size_t i;
4286 uint8_t *buf;
4287 uint16_t dialect_count = 0;
4288
4289 buf = state->smb2.dyn;
4290 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4291 if (smb2cli_prots[i].proto < state->min_protocol) {
4292 continue;
4293 }
4294
4295 if (smb2cli_prots[i].proto > state->max_protocol) {
4296 continue;
4297 }
4298
4299 SSVAL(buf, dialect_count*2, smb2cli_prots[i].smb2_dialect);
4300 dialect_count++;
4301 }
4302
4303 buf = state->smb2.fixed;
4304 SSVAL(buf, 0, 36);
4305 SSVAL(buf, 2, dialect_count);
4306 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4307 SSVAL(buf, 6, 0); /* Reserved */
4308 if (state->max_protocol >= PROTOCOL_SMB2_22) {
4309 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4310 } else {
4311 SIVAL(buf, 8, 0); /* Capabilities */
4312 }
4313 if (state->max_protocol >= PROTOCOL_SMB2_10) {
4314 NTSTATUS status;
4315 DATA_BLOB blob;
4316
4317 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4318 state, &blob);
4319 if (!NT_STATUS_IS_OK(status)) {
4320 return NULL;
4321 }
4322 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4323 } else {
4324 memset(buf+12, 0, 16); /* ClientGuid */
4325 }
4326 SBVAL(buf, 28, 0); /* ClientStartTime */
4327
4328 return smb2cli_req_send(state, state->ev,
4329 state->conn, SMB2_OP_NEGPROT,
4330 0, 0, /* flags */
4331 state->timeout_msec,
4332 NULL, NULL, /* tcon, session */
4333 state->smb2.fixed, sizeof(state->smb2.fixed),
4334 state->smb2.dyn, dialect_count*2,
4335 UINT16_MAX); /* max_dyn_len */
4336 }
4337
4338 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4339 {
4340 struct tevent_req *req =
4341 tevent_req_callback_data(subreq,
4342 struct tevent_req);
4343 struct smbXcli_negprot_state *state =
4344 tevent_req_data(req,
4345 struct smbXcli_negprot_state);
4346 struct smbXcli_conn *conn = state->conn;
4347 size_t security_offset, security_length;
4348 DATA_BLOB blob;
4349 NTSTATUS status;
4350 struct iovec *iov;
4351 uint8_t *body;
4352 size_t i;
4353 uint16_t dialect_revision;
4354 static const struct smb2cli_req_expected_response expected[] = {
4355 {
4356 .status = NT_STATUS_OK,
4357 .body_size = 0x41
4358 }
4359 };
4360
4361 status = smb2cli_req_recv(subreq, state, &iov,
4362 expected, ARRAY_SIZE(expected));
4363 TALLOC_FREE(subreq);
4364 if (tevent_req_nterror(req, status)) {
4365 return;
4366 }
4367
4368 body = (uint8_t *)iov[1].iov_base;
4369
4370 dialect_revision = SVAL(body, 4);
4371
4372 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4373 if (smb2cli_prots[i].proto < state->min_protocol) {
4374 continue;
4375 }
4376
4377 if (smb2cli_prots[i].proto > state->max_protocol) {
4378 continue;
4379 }
4380
4381 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4382 continue;
4383 }
4384
4385 conn->protocol = smb2cli_prots[i].proto;
4386 break;
4387 }
4388
4389 if (conn->protocol == PROTOCOL_NONE) {
4390 if (state->min_protocol >= PROTOCOL_SMB2_02) {
4391 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4392 return;
4393 }
4394
4395 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4396 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4397 return;
4398 }
4399
4400 /* make sure we do not loop forever */
4401 state->min_protocol = PROTOCOL_SMB2_02;
4402
4403 /*
4404 * send a SMB2 negprot, in order to negotiate
4405 * the SMB2 dialect.
4406 */
4407 subreq = smbXcli_negprot_smb2_subreq(state);
4408 if (tevent_req_nomem(subreq, req)) {
4409 return;
4410 }
4411 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4412 return;
4413 }
4414
4415 conn->smb2.server.security_mode = SVAL(body, 2);
4416
4417 blob = data_blob_const(body + 8, 16);
4418 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4419 if (tevent_req_nterror(req, status)) {
4420 return;
4421 }
4422
4423 conn->smb2.server.capabilities = IVAL(body, 24);
4424 conn->smb2.server.max_trans_size= IVAL(body, 28);
4425 conn->smb2.server.max_read_size = IVAL(body, 32);
4426 conn->smb2.server.max_write_size= IVAL(body, 36);
4427 conn->smb2.server.system_time = BVAL(body, 40);
4428 conn->smb2.server.start_time = BVAL(body, 48);
4429
4430 security_offset = SVAL(body, 56);
4431 security_length = SVAL(body, 58);
4432
4433 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4434 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4435 return;
4436 }
4437
4438 if (security_length > iov[2].iov_len) {
4439 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4440 return;
4441 }
4442
4443 conn->smb2.server.gss_blob = data_blob_talloc(conn,
4444 iov[2].iov_base,
4445 security_length);
4446 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4447 return;
4448 }
4449
4450 tevent_req_done(req);
4451 }
4452
4453 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4454 TALLOC_CTX *tmp_mem,
4455 uint8_t *inbuf)
4456 {
4457 size_t num_pending = talloc_array_length(conn->pending);
4458 struct tevent_req *subreq;
4459 struct smbXcli_req_state *substate;
4460 struct tevent_req *req;
4461 uint32_t protocol_magic;
4462 size_t inbuf_len = smb_len_nbt(inbuf);
4463
4464 if (num_pending != 1) {
4465 return NT_STATUS_INTERNAL_ERROR;
4466 }
4467
4468 if (inbuf_len < 4) {
4469 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4470 }
4471
4472 subreq = conn->pending[0];
4473 substate = tevent_req_data(subreq, struct smbXcli_req_state);
4474 req = tevent_req_callback_data(subreq, struct tevent_req);
4475
4476 protocol_magic = IVAL(inbuf, 4);
4477
4478 switch (protocol_magic) {
4479 case SMB_MAGIC:
4480 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4481 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4482 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4483
4484 case SMB2_MAGIC:
4485 if (substate->smb2.recv_iov == NULL) {
4486 /*
4487 * For the SMB1 negprot we have move it.
4488 */
4489 substate->smb2.recv_iov = substate->smb1.recv_iov;
4490 substate->smb1.recv_iov = NULL;
4491 }
4492
4493 /*
4494 * we got an SMB2 answer, which consumed sequence number 0
4495 * so we need to use 1 as the next one.
4496 *
4497 * we also need to set the current credits to 0
4498 * as we consumed the initial one. The SMB2 answer
4499 * hopefully grant us a new credit.
4500 */
4501 conn->smb2.mid = 1;
4502 conn->smb2.cur_credits = 0;
4503 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4504 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4505 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4506 }
4507
4508 DEBUG(10, ("Got non-SMB PDU\n"));
4509 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4510 }
4511
4512 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
4513 {
4514 return tevent_req_simple_recv_ntstatus(req);
4515 }
4516
4517 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
4518 uint32_t timeout_msec,
4519 enum protocol_types min_protocol,
4520 enum protocol_types max_protocol)
4521 {
4522 TALLOC_CTX *frame = talloc_stackframe();
4523 struct tevent_context *ev;
4524 struct tevent_req *req;
4525 NTSTATUS status = NT_STATUS_NO_MEMORY;
4526 bool ok;
4527
4528 if (smbXcli_conn_has_async_calls(conn)) {
4529 /*
4530 * Can't use sync call while an async call is in flight
4531 */
4532 status = NT_STATUS_INVALID_PARAMETER_MIX;
4533 goto fail;
4534 }
4535 ev = samba_tevent_context_init(frame);
4536 if (ev == NULL) {
4537 goto fail;
4538 }
4539 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
4540 min_protocol, max_protocol);
4541 if (req == NULL) {
4542 goto fail;
4543 }
4544 ok = tevent_req_poll(req, ev);
4545 if (!ok) {
4546 status = map_nt_error_from_unix_common(errno);
4547 goto fail;
4548 }
4549 status = smbXcli_negprot_recv(req);
4550 fail:
4551 TALLOC_FREE(frame);
4552 return status;
4553 }
4554
4555 static int smbXcli_session_destructor(struct smbXcli_session *session)
4556 {
4557 if (session->conn == NULL) {
4558 return 0;
4559 }
4560
4561 DLIST_REMOVE(session->conn->sessions, session);
4562 return 0;
4563 }
4564
4565 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
4566 struct smbXcli_conn *conn)
4567 {
4568 struct smbXcli_session *session;
4569
4570 session = talloc_zero(mem_ctx, struct smbXcli_session);
4571 if (session == NULL) {
4572 return NULL;
4573 }
4574 session->smb2 = talloc_zero(session, struct smb2cli_session);
4575 if (session->smb2 == NULL) {
4576 talloc_free(session);
4577 return NULL;
4578 }
4579 talloc_set_destructor(session, smbXcli_session_destructor);
4580
4581 DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
4582 session->conn = conn;
4583
4584 return session;
4585 }
4586
4587 struct smbXcli_session *smbXcli_session_copy(TALLOC_CTX *mem_ctx,
4588 struct smbXcli_session *src)
4589 {
4590 struct smbXcli_session *session;
4591
4592 session = talloc_zero(mem_ctx, struct smbXcli_session);
4593 if (session == NULL) {
4594 return NULL;
4595 }
4596 session->smb2 = talloc_zero(session, struct smb2cli_session);
4597 if (session->smb2 == NULL) {
4598 talloc_free(session);
4599 return NULL;
4600 }
4601
4602 session->conn = src->conn;
4603 *session->smb2 = *src->smb2;
4604 session->smb2_channel = src->smb2_channel;
4605 session->disconnect_expired = src->disconnect_expired;
4606
4607 DLIST_ADD_END(src->conn->sessions, session, struct smbXcli_session *);
4608 talloc_set_destructor(session, smbXcli_session_destructor);
4609
4610 return session;
4611 }
4612
4613
4614 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
4615 TALLOC_CTX *mem_ctx,
4616 DATA_BLOB *key)
4617 {
4618 const DATA_BLOB *application_key;
4619
4620 *key = data_blob_null;
4621
4622 if (session->conn == NULL) {
4623 return NT_STATUS_NO_USER_SESSION_KEY;
4624 }
4625
4626 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
4627 application_key = &session->smb2->application_key;
4628 } else {
4629 application_key = &session->smb1.application_key;
4630 }
4631
4632 if (application_key->length == 0) {
4633 return NT_STATUS_NO_USER_SESSION_KEY;
4634 }
4635
4636 *key = data_blob_dup_talloc(mem_ctx, *application_key);
4637 if (key->data == NULL) {
4638 return NT_STATUS_NO_MEMORY;
4639 }
4640
4641 return NT_STATUS_OK;
4642 }
4643
4644 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
4645 {
4646 session->disconnect_expired = true;
4647 }
4648
4649 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
4650 {
4651 return session->smb1.session_id;
4652 }
4653
4654 void smb1cli_session_set_id(struct smbXcli_session *session,
4655 uint16_t session_id)
4656 {
4657 session->smb1.session_id = session_id;
4658 }
4659
4660 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
4661 const DATA_BLOB _session_key)
4662 {
4663 struct smbXcli_conn *conn = session->conn;
4664 uint8_t session_key[16];
4665
4666 if (conn == NULL) {
4667 return NT_STATUS_INVALID_PARAMETER_MIX;
4668 }
4669
4670 if (session->smb1.application_key.length != 0) {
4671 /*
4672 * TODO: do not allow this...
4673 *
4674 * return NT_STATUS_INVALID_PARAMETER_MIX;
4675 */
4676 data_blob_clear_free(&session->smb1.application_key);
4677 session->smb1.protected_key = false;
4678 }
4679
4680 if (_session_key.length == 0) {
4681 return NT_STATUS_OK;
4682 }
4683
4684 ZERO_STRUCT(session_key);
4685 memcpy(session_key, _session_key.data,
4686 MIN(_session_key.length, sizeof(session_key)));
4687
4688 session->smb1.application_key = data_blob_talloc(session,
4689 session_key,
4690 sizeof(session_key));
4691 ZERO_STRUCT(session_key);
4692 if (session->smb1.application_key.data == NULL) {
4693 return NT_STATUS_NO_MEMORY;
4694 }
4695
4696 session->smb1.protected_key = false;
4697
4698 return NT_STATUS_OK;
4699 }
4700
4701 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
4702 {
4703 if (session->smb1.protected_key) {
4704 /* already protected */
4705 return NT_STATUS_OK;
4706 }
4707
4708 if (session->smb1.application_key.length != 16) {
4709 return NT_STATUS_INVALID_PARAMETER_MIX;
4710 }
4711
4712 smb_key_derivation(session->smb1.application_key.data,
4713 session->smb1.application_key.length,
4714 session->smb1.application_key.data);
4715
4716 session->smb1.protected_key = true;
4717
4718 return NT_STATUS_OK;
4719 }
4720
4721 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
4722 {
4723 struct smbXcli_conn *conn = session->conn;
4724 uint8_t security_mode = 0;
4725
4726 if (conn == NULL) {
4727 return security_mode;
4728 }
4729
4730 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
4731 if (conn->mandatory_signing) {
4732 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
4733 }
4734
4735 return security_mode;
4736 }
4737
4738 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
4739 {
4740 return session->smb2->session_id;
4741 }
4742
4743 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
4744 {
4745 return session->smb2->session_flags;
4746 }
4747
4748 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
4749 uint64_t session_id,
4750 uint16_t session_flags)
4751 {
4752 session->smb2->session_id = session_id;
4753 session->smb2->session_flags = session_flags;
4754 }
4755
4756 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
4757 {
4758 session->smb2->channel_sequence += 1;
4759 }
4760
4761 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
4762 const DATA_BLOB _session_key,
4763 const struct iovec *recv_iov)
4764 {
4765 struct smbXcli_conn *conn = session->conn;
4766 uint16_t no_sign_flags;
4767 uint8_t session_key[16];
4768 bool check_signature = true;
4769 uint32_t hdr_flags;
4770 NTSTATUS status;
4771
4772 if (conn == NULL) {
4773 return NT_STATUS_INVALID_PARAMETER_MIX;
4774 }
4775
4776 if (recv_iov[0].iov_len != SMB2_HDR_BODY) {
4777 return NT_STATUS_INVALID_PARAMETER_MIX;
4778 }
4779
4780 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
4781
4782 if (session->smb2->session_flags & no_sign_flags) {
4783 session->smb2->should_sign = false;
4784 return NT_STATUS_OK;
4785 }
4786
4787 if (session->smb2->signing_key.length != 0) {
4788 return NT_STATUS_INVALID_PARAMETER_MIX;
4789 }
4790
4791 ZERO_STRUCT(session_key);
4792 memcpy(session_key, _session_key.data,
4793 MIN(_session_key.length, sizeof(session_key)));
4794
4795 session->smb2->signing_key = data_blob_talloc(session,
4796 session_key,
4797 sizeof(session_key));
4798 if (session->smb2->signing_key.data == NULL) {
4799 ZERO_STRUCT(session_key);
4800 return NT_STATUS_NO_MEMORY;
4801 }
4802
4803 if (conn->protocol >= PROTOCOL_SMB2_24) {
4804 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4805 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4806
4807 smb2_key_derivation(session_key, sizeof(session_key),
4808 label.data, label.length,
4809 context.data, context.length,
4810 session->smb2->signing_key.data);
4811 }
4812
4813 session->smb2->encryption_key = data_blob_dup_talloc(session,
4814 session->smb2->signing_key);
4815 if (session->smb2->encryption_key.data == NULL) {
4816 ZERO_STRUCT(session_key);
4817 return NT_STATUS_NO_MEMORY;
4818 }
4819
4820 if (conn->protocol >= PROTOCOL_SMB2_24) {
4821 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4822 const DATA_BLOB context = data_blob_string_const_null("ServerIn ");
4823
4824 smb2_key_derivation(session_key, sizeof(session_key),
4825 label.data, label.length,
4826 context.data, context.length,
4827 session->smb2->encryption_key.data);
4828 }
4829
4830 session->smb2->decryption_key = data_blob_dup_talloc(session,
4831 session->smb2->signing_key);
4832 if (session->smb2->decryption_key.data == NULL) {
4833 ZERO_STRUCT(session_key);
4834 return NT_STATUS_NO_MEMORY;
4835 }
4836
4837 if (conn->protocol >= PROTOCOL_SMB2_24) {
4838 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4839 const DATA_BLOB context = data_blob_string_const_null("ServerOut");
4840
4841 smb2_key_derivation(session_key, sizeof(session_key),
4842 label.data, label.length,
4843 context.data, context.length,
4844 session->smb2->decryption_key.data);
4845 }
4846
4847 session->smb2->application_key = data_blob_dup_talloc(session,
4848 session->smb2->signing_key);
4849 if (session->smb2->application_key.data == NULL) {
4850 ZERO_STRUCT(session_key);
4851 return NT_STATUS_NO_MEMORY;
4852 }
4853
4854 if (conn->protocol >= PROTOCOL_SMB2_24) {
4855 const DATA_BLOB label = data_blob_string_const_null("SMB2APP");
4856 const DATA_BLOB context = data_blob_string_const_null("SmbRpc");
4857
4858 smb2_key_derivation(session_key, sizeof(session_key),
4859 label.data, label.length,
4860 context.data, context.length,
4861 session->smb2->application_key.data);
4862 }
4863 ZERO_STRUCT(session_key);
4864
4865 session->smb2_channel.signing_key = data_blob_dup_talloc(session,
4866 session->smb2->signing_key);
4867 if (session->smb2_channel.signing_key.data == NULL) {
4868 return NT_STATUS_NO_MEMORY;
4869 }
4870
4871 check_signature = conn->mandatory_signing;
4872
4873 hdr_flags = IVAL(recv_iov[0].iov_base, SMB2_HDR_FLAGS);
4874 if (hdr_flags & SMB2_HDR_FLAG_SIGNED) {
4875 /*
4876 * Sadly some vendors don't sign the
4877 * final SMB2 session setup response
4878 *
4879 * At least Windows and Samba are always doing this
4880 * if there's a session key available.
4881 *
4882 * We only check the signature if it's mandatory
4883 * or SMB2_HDR_FLAG_SIGNED is provided.
4884 */
4885 check_signature = true;
4886 }
4887
4888 if (check_signature) {
4889 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4890 session->conn->protocol,
4891 recv_iov, 3);
4892 if (!NT_STATUS_IS_OK(status)) {
4893 return status;
4894 }
4895 }
4896
4897 session->smb2->should_sign = false;
4898 session->smb2->should_encrypt = false;
4899
4900 if (conn->desire_signing) {
4901 session->smb2->should_sign = true;
4902 }
4903
4904 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
4905 session->smb2->should_sign = true;
4906 }
4907
4908 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
4909 session->smb2->should_encrypt = true;
4910 }
4911
4912 if (conn->protocol < PROTOCOL_SMB2_24) {
4913 session->smb2->should_encrypt = false;
4914 }
4915
4916 if (!(conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
4917 session->smb2->should_encrypt = false;
4918 }
4919
4920 generate_random_buffer((uint8_t *)&session->smb2->nonce_high,
4921 sizeof(session->smb2->nonce_high));
4922 session->smb2->nonce_low = 1;
4923
4924 return NT_STATUS_OK;
4925 }
4926
4927 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
4928 struct smbXcli_session *session1,
4929 struct smbXcli_conn *conn,
4930 struct smbXcli_session **_session2)
4931 {
4932 struct smbXcli_session *session2;
4933
4934 if (session1->smb2->signing_key.length == 0) {
4935 return NT_STATUS_INVALID_PARAMETER_MIX;
4936 }
4937
4938 if (conn == NULL) {
4939 return NT_STATUS_INVALID_PARAMETER_MIX;
4940 }
4941
4942 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
4943 if (session2 == NULL) {
4944 return NT_STATUS_NO_MEMORY;
4945 }
4946 session2->smb2 = talloc_reference(session2, session1->smb2);
4947 if (session2->smb2 == NULL) {
4948 talloc_free(session2);
4949 return NT_STATUS_NO_MEMORY;
4950 }
4951
4952 talloc_set_destructor(session2, smbXcli_session_destructor);
4953 DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
4954 session2->conn = conn;
4955
4956 *_session2 = session2;
4957 return NT_STATUS_OK;
4958 }
4959
4960 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
4961 const DATA_BLOB _channel_key,
4962 const struct iovec *recv_iov)
4963 {
4964 struct smbXcli_conn *conn = session->conn;
4965 uint8_t channel_key[16];
4966 NTSTATUS status;
4967
4968 if (conn == NULL) {
4969 return NT_STATUS_INVALID_PARAMETER_MIX;
4970 }
4971
4972 if (session->smb2_channel.signing_key.length != 0) {
4973 return NT_STATUS_INVALID_PARAMETER_MIX;
4974 }
4975
4976 ZERO_STRUCT(channel_key);
4977 memcpy(channel_key, _channel_key.data,
4978 MIN(_channel_key.length, sizeof(channel_key)));
4979
4980 session->smb2_channel.signing_key = data_blob_talloc(session,
4981 channel_key,
4982 sizeof(channel_key));
4983 if (session->smb2_channel.signing_key.data == NULL) {
4984 ZERO_STRUCT(channel_key);
4985 return NT_STATUS_NO_MEMORY;
4986 }
4987
4988 if (conn->protocol >= PROTOCOL_SMB2_24) {
4989 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4990 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4991
4992 smb2_key_derivation(channel_key, sizeof(channel_key),
4993 label.data, label.length,
4994 context.data, context.length,
4995 session->smb2_channel.signing_key.data);
4996 }
4997 ZERO_STRUCT(channel_key);
4998
4999 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
5000 session->conn->protocol,
5001 recv_iov, 3);
5002 if (!NT_STATUS_IS_OK(status)) {
5003 return status;
5004 }
5005
5006 return NT_STATUS_OK;
5007 }
5008
5009 NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
5010 {
5011 if (session->smb2->should_encrypt) {
5012 return NT_STATUS_OK;
5013 }
5014
5015 if (session->conn->protocol < PROTOCOL_SMB2_24) {
5016 return NT_STATUS_NOT_SUPPORTED;
5017 }
5018
5019 if (!(session->conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
5020 return NT_STATUS_NOT_SUPPORTED;
5021 }
5022
5023 if (session->smb2->signing_key.data == NULL) {
5024 return NT_STATUS_NOT_SUPPORTED;
5025 }
5026 session->smb2->should_encrypt = true;
5027 return NT_STATUS_OK;
5028 }
5029
5030 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
5031 {
5032 struct smbXcli_tcon *tcon;
5033
5034 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
5035 if (tcon == NULL) {
5036 return NULL;
5037 }
5038
5039 return tcon;
5040 }
5041
5042 void smbXcli_tcon_set_fs_attributes(struct smbXcli_tcon *tcon,
5043 uint32_t fs_attributes)
5044 {
5045 tcon->fs_attributes = fs_attributes;
5046 }
5047
5048 uint32_t smbXcli_tcon_get_fs_attributes(struct smbXcli_tcon *tcon)
5049 {
5050 return tcon->fs_attributes;
5051 }
5052
5053 bool smbXcli_tcon_is_dfs_share(struct smbXcli_tcon *tcon)
5054 {
5055 if (tcon == NULL) {
5056 return false;
5057 }
5058
5059 if (tcon->is_smb1) {
5060 if (tcon->smb1.optional_support & SMB_SHARE_IN_DFS) {
5061 return true;
5062 }
5063
5064 return false;
5065 }
5066
5067 if (tcon->smb2.capabilities & SMB2_SHARE_CAP_DFS) {
5068 return true;
5069 }
5070
5071 return false;
5072 }
5073
5074 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
5075 {
5076 return tcon->smb1.tcon_id;
5077 }
5078
5079 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
5080 {
5081 tcon->is_smb1 = true;
5082 tcon->smb1.tcon_id = tcon_id;
5083 }
5084
5085 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
5086 uint16_t tcon_id,
5087 uint16_t optional_support,
5088 uint32_t maximal_access,
5089 uint32_t guest_maximal_access,
5090 const char *service,
5091 const char *fs_type)
5092 {
5093 tcon->is_smb1 = true;
5094 tcon->fs_attributes = 0;
5095 tcon->smb1.tcon_id = tcon_id;
5096 tcon->smb1.optional_support = optional_support;
5097 tcon->smb1.maximal_access = maximal_access;
5098 tcon->smb1.guest_maximal_access = guest_maximal_access;
5099
5100 TALLOC_FREE(tcon->smb1.service);
5101 tcon->smb1.service = talloc_strdup(tcon, service);
5102 if (service != NULL && tcon->smb1.service == NULL) {
5103 return false;
5104 }
5105
5106 TALLOC_FREE(tcon->smb1.fs_type);
5107 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
5108 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
5109 return false;
5110 }
5111
5112 return true;
5113 }
5114
5115 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
5116 {
5117 return tcon->smb2.tcon_id;
5118 }
5119
5120 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
5121 {
5122 return tcon->smb2.capabilities;
5123 }
5124
5125 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
5126 struct smbXcli_session *session,
5127 uint32_t tcon_id,
5128 uint8_t type,
5129 uint32_t flags,
5130 uint32_t capabilities,
5131 uint32_t maximal_access)
5132 {
5133 tcon->is_smb1 = false;
5134 tcon->fs_attributes = 0;
5135 tcon->smb2.tcon_id = tcon_id;
5136 tcon->smb2.type = type;
5137 tcon->smb2.flags = flags;
5138 tcon->smb2.capabilities = capabilities;
5139 tcon->smb2.maximal_access = maximal_access;
5140
5141 tcon->smb2.should_encrypt = false;
5142
5143 if (session == NULL) {
5144 return;
5145 }
5146
5147 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
5148
5149 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
5150 tcon->smb2.should_encrypt = true;
5151 }
5152 }
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