?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
docs: fix testparm manpage.
[Samba.git] / libcli / smb / smbXcli_base.c
blob082b62604b1f49bf1a4e5dff89ab75503000feb0
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 smbXcli_conn_disconnect(conn, NT_STATUS_INTERNAL_ERROR);
1612 TALLOC_FREE(frame);
1613 return;
1614 }
1615 conn->read_smb_req = NULL;
1616
1617 received = read_smb_recv(subreq, frame, &inbuf, &err);
1618 TALLOC_FREE(subreq);
1619 if (received == -1) {
1620 status = map_nt_error_from_unix_common(err);
1621 smbXcli_conn_disconnect(conn, status);
1622 TALLOC_FREE(frame);
1623 return;
1624 }
1625
1626 status = conn->dispatch_incoming(conn, frame, inbuf);
1627 TALLOC_FREE(frame);
1628 if (NT_STATUS_IS_OK(status)) {
1629 /*
1630 * We should not do any more processing
1631 * as the dispatch function called
1632 * tevent_req_done().
1633 */
1634 return;
1635 }
1636
1637 if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1638 /*
1639 * We got an error, so notify all pending requests
1640 */
1641 smbXcli_conn_disconnect(conn, status);
1642 return;
1643 }
1644
1645 /*
1646 * We got NT_STATUS_RETRY, so we may ask for a
1647 * next incoming pdu.
1648 */
1649 if (!smbXcli_conn_receive_next(conn)) {
1650 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1651 }
1652 }
1653
1654 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1655 struct iovec **piov, int *pnum_iov)
1656 {
1657 struct iovec *iov;
1658 int num_iov;
1659 size_t buflen;
1660 size_t taken;
1661 size_t remaining;
1662 uint8_t *hdr;
1663 uint8_t cmd;
1664 uint32_t wct_ofs;
1665 NTSTATUS status;
1666 size_t min_size = MIN_SMB_SIZE;
1667
1668 buflen = smb_len_tcp(buf);
1669 taken = 0;
1670
1671 hdr = buf + NBT_HDR_SIZE;
1672
1673 status = smb1cli_pull_raw_error(hdr);
1674 if (NT_STATUS_IS_ERR(status)) {
1675 /*
1676 * This is an ugly hack to support OS/2
1677 * which skips the byte_count in the DATA block
1678 * on some error responses.
1679 *
1680 * See bug #9096
1681 */
1682 min_size -= sizeof(uint16_t);
1683 }
1684
1685 if (buflen < min_size) {
1686 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1687 }
1688
1689 /*
1690 * This returns iovec elements in the following order:
1691 *
1692 * - SMB header
1693 *
1694 * - Parameter Block
1695 * - Data Block
1696 *
1697 * - Parameter Block
1698 * - Data Block
1699 *
1700 * - Parameter Block
1701 * - Data Block
1702 */
1703 num_iov = 1;
1704
1705 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1706 if (iov == NULL) {
1707 return NT_STATUS_NO_MEMORY;
1708 }
1709 iov[0].iov_base = hdr;
1710 iov[0].iov_len = HDR_WCT;
1711 taken += HDR_WCT;
1712
1713 cmd = CVAL(hdr, HDR_COM);
1714 wct_ofs = HDR_WCT;
1715
1716 while (true) {
1717 size_t len = buflen - taken;
1718 struct iovec *cur;
1719 struct iovec *iov_tmp;
1720 uint8_t wct;
1721 uint32_t bcc_ofs;
1722 uint16_t bcc;
1723 size_t needed;
1724
1725 /*
1726 * we need at least WCT
1727 */
1728 needed = sizeof(uint8_t);
1729 if (len < needed) {
1730 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1731 __location__, (int)len, (int)needed));
1732 goto inval;
1733 }
1734
1735 /*
1736 * Now we check if the specified words are there
1737 */
1738 wct = CVAL(hdr, wct_ofs);
1739 needed += wct * sizeof(uint16_t);
1740 if (len < needed) {
1741 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1742 __location__, (int)len, (int)needed));
1743 goto inval;
1744 }
1745
1746 if ((num_iov == 1) &&
1747 (len == needed) &&
1748 NT_STATUS_IS_ERR(status))
1749 {
1750 /*
1751 * This is an ugly hack to support OS/2
1752 * which skips the byte_count in the DATA block
1753 * on some error responses.
1754 *
1755 * See bug #9096
1756 */
1757 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1758 num_iov + 2);
1759 if (iov_tmp == NULL) {
1760 TALLOC_FREE(iov);
1761 return NT_STATUS_NO_MEMORY;
1762 }
1763 iov = iov_tmp;
1764 cur = &iov[num_iov];
1765 num_iov += 2;
1766
1767 cur[0].iov_len = 0;
1768 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1769 cur[1].iov_len = 0;
1770 cur[1].iov_base = cur[0].iov_base;
1771
1772 taken += needed;
1773 break;
1774 }
1775
1776 /*
1777 * we need at least BCC
1778 */
1779 needed += sizeof(uint16_t);
1780 if (len < needed) {
1781 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1782 __location__, (int)len, (int)needed));
1783 goto inval;
1784 }
1785
1786 /*
1787 * Now we check if the specified bytes are there
1788 */
1789 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1790 bcc = SVAL(hdr, bcc_ofs);
1791 needed += bcc * sizeof(uint8_t);
1792 if (len < needed) {
1793 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1794 __location__, (int)len, (int)needed));
1795 goto inval;
1796 }
1797
1798 /*
1799 * we allocate 2 iovec structures for words and bytes
1800 */
1801 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1802 num_iov + 2);
1803 if (iov_tmp == NULL) {
1804 TALLOC_FREE(iov);
1805 return NT_STATUS_NO_MEMORY;
1806 }
1807 iov = iov_tmp;
1808 cur = &iov[num_iov];
1809 num_iov += 2;
1810
1811 cur[0].iov_len = wct * sizeof(uint16_t);
1812 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1813 cur[1].iov_len = bcc * sizeof(uint8_t);
1814 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1815
1816 taken += needed;
1817
1818 if (!smb1cli_is_andx_req(cmd)) {
1819 /*
1820 * If the current command does not have AndX chanining
1821 * we are done.
1822 */
1823 break;
1824 }
1825
1826 if (wct == 0 && bcc == 0) {
1827 /*
1828 * An empty response also ends the chain,
1829 * most likely with an error.
1830 */
1831 break;
1832 }
1833
1834 if (wct < 2) {
1835 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1836 __location__, (int)wct, (int)cmd));
1837 goto inval;
1838 }
1839 cmd = CVAL(cur[0].iov_base, 0);
1840 if (cmd == 0xFF) {
1841 /*
1842 * If it is the end of the chain we are also done.
1843 */
1844 break;
1845 }
1846 wct_ofs = SVAL(cur[0].iov_base, 2);
1847
1848 if (wct_ofs < taken) {
1849 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1850 }
1851 if (wct_ofs > buflen) {
1852 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1853 }
1854
1855 /*
1856 * we consumed everything up to the start of the next
1857 * parameter block.
1858 */
1859 taken = wct_ofs;
1860 }
1861
1862 remaining = buflen - taken;
1863
1864 if (remaining > 0 && num_iov >= 3) {
1865 /*
1866 * The last DATA block gets the remaining
1867 * bytes, this is needed to support
1868 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1869 */
1870 iov[num_iov-1].iov_len += remaining;
1871 }
1872
1873 *piov = iov;
1874 *pnum_iov = num_iov;
1875 return NT_STATUS_OK;
1876
1877 inval:
1878 TALLOC_FREE(iov);
1879 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1880 }
1881
1882 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1883 TALLOC_CTX *tmp_mem,
1884 uint8_t *inbuf)
1885 {
1886 struct tevent_req *req;
1887 struct smbXcli_req_state *state;
1888 NTSTATUS status;
1889 size_t num_pending;
1890 size_t i;
1891 uint8_t cmd;
1892 uint16_t mid;
1893 bool oplock_break;
1894 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1895 size_t len = smb_len_tcp(inbuf);
1896 struct iovec *iov = NULL;
1897 int num_iov = 0;
1898 struct tevent_req **chain = NULL;
1899 size_t num_chained = 0;
1900 size_t num_responses = 0;
1901
1902 if (conn->smb1.read_braw_req != NULL) {
1903 req = conn->smb1.read_braw_req;
1904 conn->smb1.read_braw_req = NULL;
1905 state = tevent_req_data(req, struct smbXcli_req_state);
1906
1907 smbXcli_req_unset_pending(req);
1908
1909 if (state->smb1.recv_iov == NULL) {
1910 /*
1911 * For requests with more than
1912 * one response, we have to readd the
1913 * recv_iov array.
1914 */
1915 state->smb1.recv_iov = talloc_zero_array(state,
1916 struct iovec,
1917 3);
1918 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1919 return NT_STATUS_OK;
1920 }
1921 }
1922
1923 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
1924 state->smb1.recv_iov[0].iov_len = len;
1925 ZERO_STRUCT(state->smb1.recv_iov[1]);
1926 ZERO_STRUCT(state->smb1.recv_iov[2]);
1927
1928 state->smb1.recv_cmd = SMBreadBraw;
1929 state->smb1.recv_status = NT_STATUS_OK;
1930 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1931
1932 tevent_req_done(req);
1933 return NT_STATUS_OK;
1934 }
1935
1936 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1937 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1938 DEBUG(10, ("Got non-SMB PDU\n"));
1939 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1940 }
1941
1942 /*
1943 * If we supported multiple encrytion contexts
1944 * here we'd look up based on tid.
1945 */
1946 if (common_encryption_on(conn->smb1.trans_enc)
1947 && (CVAL(inbuf, 0) == 0)) {
1948 uint16_t enc_ctx_num;
1949
1950 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1951 if (!NT_STATUS_IS_OK(status)) {
1952 DEBUG(10, ("get_enc_ctx_num returned %s\n",
1953 nt_errstr(status)));
1954 return status;
1955 }
1956
1957 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1958 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1959 enc_ctx_num,
1960 conn->smb1.trans_enc->enc_ctx_num));
1961 return NT_STATUS_INVALID_HANDLE;
1962 }
1963
1964 status = common_decrypt_buffer(conn->smb1.trans_enc,
1965 (char *)inbuf);
1966 if (!NT_STATUS_IS_OK(status)) {
1967 DEBUG(10, ("common_decrypt_buffer returned %s\n",
1968 nt_errstr(status)));
1969 return status;
1970 }
1971 inhdr = inbuf + NBT_HDR_SIZE;
1972 len = smb_len_nbt(inbuf);
1973 }
1974
1975 mid = SVAL(inhdr, HDR_MID);
1976 num_pending = talloc_array_length(conn->pending);
1977
1978 for (i=0; i<num_pending; i++) {
1979 if (mid == smb1cli_req_mid(conn->pending[i])) {
1980 break;
1981 }
1982 }
1983 if (i == num_pending) {
1984 /* Dump unexpected reply */
1985 return NT_STATUS_RETRY;
1986 }
1987
1988 oplock_break = false;
1989
1990 if (mid == 0xffff) {
1991 /*
1992 * Paranoia checks that this is really an oplock break request.
1993 */
1994 oplock_break = (len == 51); /* hdr + 8 words */
1995 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
1996 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
1997 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
1998 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
1999
2000 if (!oplock_break) {
2001 /* Dump unexpected reply */
2002 return NT_STATUS_RETRY;
2003 }
2004 }
2005
2006 req = conn->pending[i];
2007 state = tevent_req_data(req, struct smbXcli_req_state);
2008
2009 if (!oplock_break /* oplock breaks are not signed */
2010 && !smb_signing_check_pdu(conn->smb1.signing,
2011 inhdr, len, state->smb1.seqnum+1)) {
2012 DEBUG(10, ("cli_check_sign_mac failed\n"));
2013 return NT_STATUS_ACCESS_DENIED;
2014 }
2015
2016 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
2017 &iov, &num_iov);
2018 if (!NT_STATUS_IS_OK(status)) {
2019 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
2020 nt_errstr(status)));
2021 return status;
2022 }
2023
2024 cmd = CVAL(inhdr, HDR_COM);
2025 status = smb1cli_pull_raw_error(inhdr);
2026
2027 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
2028 (state->session != NULL) && state->session->disconnect_expired)
2029 {
2030 /*
2031 * this should be a short term hack
2032 * until the upper layers have implemented
2033 * re-authentication.
2034 */
2035 return status;
2036 }
2037
2038 if (state->smb1.chained_requests == NULL) {
2039 if (num_iov != 3) {
2040 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2041 }
2042
2043 smbXcli_req_unset_pending(req);
2044
2045 if (state->smb1.recv_iov == NULL) {
2046 /*
2047 * For requests with more than
2048 * one response, we have to readd the
2049 * recv_iov array.
2050 */
2051 state->smb1.recv_iov = talloc_zero_array(state,
2052 struct iovec,
2053 3);
2054 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2055 return NT_STATUS_OK;
2056 }
2057 }
2058
2059 state->smb1.recv_cmd = cmd;
2060 state->smb1.recv_status = status;
2061 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2062
2063 state->smb1.recv_iov[0] = iov[0];
2064 state->smb1.recv_iov[1] = iov[1];
2065 state->smb1.recv_iov[2] = iov[2];
2066
2067 if (talloc_array_length(conn->pending) == 0) {
2068 tevent_req_done(req);
2069 return NT_STATUS_OK;
2070 }
2071
2072 tevent_req_defer_callback(req, state->ev);
2073 tevent_req_done(req);
2074 return NT_STATUS_RETRY;
2075 }
2076
2077 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2078 num_chained = talloc_array_length(chain);
2079 num_responses = (num_iov - 1)/2;
2080
2081 if (num_responses > num_chained) {
2082 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2083 }
2084
2085 for (i=0; i<num_chained; i++) {
2086 size_t iov_idx = 1 + (i*2);
2087 struct iovec *cur = &iov[iov_idx];
2088 uint8_t *inbuf_ref;
2089
2090 req = chain[i];
2091 state = tevent_req_data(req, struct smbXcli_req_state);
2092
2093 smbXcli_req_unset_pending(req);
2094
2095 /*
2096 * as we finish multiple requests here
2097 * we need to defer the callbacks as
2098 * they could destroy our current stack state.
2099 */
2100 tevent_req_defer_callback(req, state->ev);
2101
2102 if (i >= num_responses) {
2103 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2104 continue;
2105 }
2106
2107 if (state->smb1.recv_iov == NULL) {
2108 /*
2109 * For requests with more than
2110 * one response, we have to readd the
2111 * recv_iov array.
2112 */
2113 state->smb1.recv_iov = talloc_zero_array(state,
2114 struct iovec,
2115 3);
2116 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2117 continue;
2118 }
2119 }
2120
2121 state->smb1.recv_cmd = cmd;
2122
2123 if (i == (num_responses - 1)) {
2124 /*
2125 * The last request in the chain gets the status
2126 */
2127 state->smb1.recv_status = status;
2128 } else {
2129 cmd = CVAL(cur[0].iov_base, 0);
2130 state->smb1.recv_status = NT_STATUS_OK;
2131 }
2132
2133 state->inbuf = inbuf;
2134
2135 /*
2136 * Note: here we use talloc_reference() in a way
2137 * that does not expose it to the caller.
2138 */
2139 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2140 if (tevent_req_nomem(inbuf_ref, req)) {
2141 continue;
2142 }
2143
2144 /* copy the related buffers */
2145 state->smb1.recv_iov[0] = iov[0];
2146 state->smb1.recv_iov[1] = cur[0];
2147 state->smb1.recv_iov[2] = cur[1];
2148
2149 tevent_req_done(req);
2150 }
2151
2152 return NT_STATUS_RETRY;
2153 }
2154
2155 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2156 TALLOC_CTX *mem_ctx,
2157 struct iovec **piov,
2158 uint8_t **phdr,
2159 uint8_t *pwct,
2160 uint16_t **pvwv,
2161 uint32_t *pvwv_offset,
2162 uint32_t *pnum_bytes,
2163 uint8_t **pbytes,
2164 uint32_t *pbytes_offset,
2165 uint8_t **pinbuf,
2166 const struct smb1cli_req_expected_response *expected,
2167 size_t num_expected)
2168 {
2169 struct smbXcli_req_state *state =
2170 tevent_req_data(req,
2171 struct smbXcli_req_state);
2172 NTSTATUS status = NT_STATUS_OK;
2173 struct iovec *recv_iov = NULL;
2174 uint8_t *hdr = NULL;
2175 uint8_t wct = 0;
2176 uint32_t vwv_offset = 0;
2177 uint16_t *vwv = NULL;
2178 uint32_t num_bytes = 0;
2179 uint32_t bytes_offset = 0;
2180 uint8_t *bytes = NULL;
2181 size_t i;
2182 bool found_status = false;
2183 bool found_size = false;
2184
2185 if (piov != NULL) {
2186 *piov = NULL;
2187 }
2188 if (phdr != NULL) {
2189 *phdr = 0;
2190 }
2191 if (pwct != NULL) {
2192 *pwct = 0;
2193 }
2194 if (pvwv != NULL) {
2195 *pvwv = NULL;
2196 }
2197 if (pvwv_offset != NULL) {
2198 *pvwv_offset = 0;
2199 }
2200 if (pnum_bytes != NULL) {
2201 *pnum_bytes = 0;
2202 }
2203 if (pbytes != NULL) {
2204 *pbytes = NULL;
2205 }
2206 if (pbytes_offset != NULL) {
2207 *pbytes_offset = 0;
2208 }
2209 if (pinbuf != NULL) {
2210 *pinbuf = NULL;
2211 }
2212
2213 if (state->inbuf != NULL) {
2214 recv_iov = state->smb1.recv_iov;
2215 state->smb1.recv_iov = NULL;
2216 if (state->smb1.recv_cmd != SMBreadBraw) {
2217 hdr = (uint8_t *)recv_iov[0].iov_base;
2218 wct = recv_iov[1].iov_len/2;
2219 vwv = (uint16_t *)recv_iov[1].iov_base;
2220 vwv_offset = PTR_DIFF(vwv, hdr);
2221 num_bytes = recv_iov[2].iov_len;
2222 bytes = (uint8_t *)recv_iov[2].iov_base;
2223 bytes_offset = PTR_DIFF(bytes, hdr);
2224 }
2225 }
2226
2227 if (tevent_req_is_nterror(req, &status)) {
2228 for (i=0; i < num_expected; i++) {
2229 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2230 found_status = true;
2231 break;
2232 }
2233 }
2234
2235 if (found_status) {
2236 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2237 }
2238
2239 return status;
2240 }
2241
2242 if (num_expected == 0) {
2243 found_status = true;
2244 found_size = true;
2245 }
2246
2247 status = state->smb1.recv_status;
2248
2249 for (i=0; i < num_expected; i++) {
2250 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2251 continue;
2252 }
2253
2254 found_status = true;
2255 if (expected[i].wct == 0) {
2256 found_size = true;
2257 break;
2258 }
2259
2260 if (expected[i].wct == wct) {
2261 found_size = true;
2262 break;
2263 }
2264 }
2265
2266 if (!found_status) {
2267 return status;
2268 }
2269
2270 if (!found_size) {
2271 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2272 }
2273
2274 if (piov != NULL) {
2275 *piov = talloc_move(mem_ctx, &recv_iov);
2276 }
2277
2278 if (phdr != NULL) {
2279 *phdr = hdr;
2280 }
2281 if (pwct != NULL) {
2282 *pwct = wct;
2283 }
2284 if (pvwv != NULL) {
2285 *pvwv = vwv;
2286 }
2287 if (pvwv_offset != NULL) {
2288 *pvwv_offset = vwv_offset;
2289 }
2290 if (pnum_bytes != NULL) {
2291 *pnum_bytes = num_bytes;
2292 }
2293 if (pbytes != NULL) {
2294 *pbytes = bytes;
2295 }
2296 if (pbytes_offset != NULL) {
2297 *pbytes_offset = bytes_offset;
2298 }
2299 if (pinbuf != NULL) {
2300 *pinbuf = state->inbuf;
2301 }
2302
2303 return status;
2304 }
2305
2306 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2307 {
2308 size_t wct_ofs;
2309 int i;
2310
2311 wct_ofs = HDR_WCT;
2312
2313 for (i=0; i<num_reqs; i++) {
2314 struct smbXcli_req_state *state;
2315 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2316 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2317 state->smb1.iov_count-2);
2318 wct_ofs = (wct_ofs + 3) & ~3;
2319 }
2320 return wct_ofs;
2321 }
2322
2323 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2324 {
2325 struct smbXcli_req_state *first_state =
2326 tevent_req_data(reqs[0],
2327 struct smbXcli_req_state);
2328 struct smbXcli_req_state *state;
2329 size_t wct_offset;
2330 size_t chain_padding = 0;
2331 int i, iovlen;
2332 struct iovec *iov = NULL;
2333 struct iovec *this_iov;
2334 NTSTATUS status;
2335 size_t nbt_len;
2336
2337 if (num_reqs == 1) {
2338 return smb1cli_req_writev_submit(reqs[0], first_state,
2339 first_state->smb1.iov,
2340 first_state->smb1.iov_count);
2341 }
2342
2343 iovlen = 0;
2344 for (i=0; i<num_reqs; i++) {
2345 if (!tevent_req_is_in_progress(reqs[i])) {
2346 return NT_STATUS_INTERNAL_ERROR;
2347 }
2348
2349 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2350
2351 if (state->smb1.iov_count < 4) {
2352 return NT_STATUS_INVALID_PARAMETER_MIX;
2353 }
2354
2355 if (i == 0) {
2356 /*
2357 * The NBT and SMB header
2358 */
2359 iovlen += 2;
2360 } else {
2361 /*
2362 * Chain padding
2363 */
2364 iovlen += 1;
2365 }
2366
2367 /*
2368 * words and bytes
2369 */
2370 iovlen += state->smb1.iov_count - 2;
2371 }
2372
2373 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2374 if (iov == NULL) {
2375 return NT_STATUS_NO_MEMORY;
2376 }
2377
2378 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2379 first_state, reqs, sizeof(*reqs) * num_reqs);
2380 if (first_state->smb1.chained_requests == NULL) {
2381 TALLOC_FREE(iov);
2382 return NT_STATUS_NO_MEMORY;
2383 }
2384
2385 wct_offset = HDR_WCT;
2386 this_iov = iov;
2387
2388 for (i=0; i<num_reqs; i++) {
2389 size_t next_padding = 0;
2390 uint16_t *vwv;
2391
2392 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2393
2394 if (i < num_reqs-1) {
2395 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2396 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2397 TALLOC_FREE(iov);
2398 TALLOC_FREE(first_state->smb1.chained_requests);
2399 return NT_STATUS_INVALID_PARAMETER_MIX;
2400 }
2401 }
2402
2403 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2404 state->smb1.iov_count-2) + 1;
2405 if ((wct_offset % 4) != 0) {
2406 next_padding = 4 - (wct_offset % 4);
2407 }
2408 wct_offset += next_padding;
2409 vwv = state->smb1.vwv;
2410
2411 if (i < num_reqs-1) {
2412 struct smbXcli_req_state *next_state =
2413 tevent_req_data(reqs[i+1],
2414 struct smbXcli_req_state);
2415 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2416 SCVAL(vwv+0, 1, 0);
2417 SSVAL(vwv+1, 0, wct_offset);
2418 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2419 /* properly end the chain */
2420 SCVAL(vwv+0, 0, 0xff);
2421 SCVAL(vwv+0, 1, 0xff);
2422 SSVAL(vwv+1, 0, 0);
2423 }
2424
2425 if (i == 0) {
2426 /*
2427 * The NBT and SMB header
2428 */
2429 this_iov[0] = state->smb1.iov[0];
2430 this_iov[1] = state->smb1.iov[1];
2431 this_iov += 2;
2432 } else {
2433 /*
2434 * This one is a bit subtle. We have to add
2435 * chain_padding bytes between the requests, and we
2436 * have to also include the wct field of the
2437 * subsequent requests. We use the subsequent header
2438 * for the padding, it contains the wct field in its
2439 * last byte.
2440 */
2441 this_iov[0].iov_len = chain_padding+1;
2442 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2443 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2444 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2445 this_iov += 1;
2446 }
2447
2448 /*
2449 * copy the words and bytes
2450 */
2451 memcpy(this_iov, state->smb1.iov+2,
2452 sizeof(struct iovec) * (state->smb1.iov_count-2));
2453 this_iov += state->smb1.iov_count - 2;
2454 chain_padding = next_padding;
2455 }
2456
2457 nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
2458 if (nbt_len > first_state->conn->smb1.max_xmit) {
2459 TALLOC_FREE(iov);
2460 TALLOC_FREE(first_state->smb1.chained_requests);
2461 return NT_STATUS_INVALID_PARAMETER_MIX;
2462 }
2463
2464 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2465 if (!NT_STATUS_IS_OK(status)) {
2466 TALLOC_FREE(iov);
2467 TALLOC_FREE(first_state->smb1.chained_requests);
2468 return status;
2469 }
2470
2471 return NT_STATUS_OK;
2472 }
2473
2474 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2475 {
2476 return ((tevent_queue_length(conn->outgoing) != 0)
2477 || (talloc_array_length(conn->pending) != 0));
2478 }
2479
2480 bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn)
2481 {
2482 if (conn->protocol >= PROTOCOL_SMB2_02) {
2483 return (smb2cli_conn_server_capabilities(conn) & SMB2_CAP_DFS);
2484 }
2485
2486 return (smb1cli_conn_capabilities(conn) & CAP_DFS);
2487 }
2488
2489 bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
2490 {
2491 uint16_t credits = 1;
2492
2493 if (conn->smb2.cur_credits == 0) {
2494 if (max_dyn_len != NULL) {
2495 *max_dyn_len = 0;
2496 }
2497 return false;
2498 }
2499
2500 if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2501 credits = conn->smb2.cur_credits;
2502 }
2503
2504 if (max_dyn_len != NULL) {
2505 *max_dyn_len = credits * 65536;
2506 }
2507
2508 return true;
2509 }
2510
2511 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2512 {
2513 return conn->smb2.server.capabilities;
2514 }
2515
2516 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2517 {
2518 return conn->smb2.server.security_mode;
2519 }
2520
2521 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2522 {
2523 return conn->smb2.server.max_trans_size;
2524 }
2525
2526 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2527 {
2528 return conn->smb2.server.max_read_size;
2529 }
2530
2531 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2532 {
2533 return conn->smb2.server.max_write_size;
2534 }
2535
2536 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2537 uint16_t max_credits)
2538 {
2539 conn->smb2.max_credits = max_credits;
2540 }
2541
2542 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2543
2544 static bool smb2cli_req_cancel(struct tevent_req *req)
2545 {
2546 struct smbXcli_req_state *state =
2547 tevent_req_data(req,
2548 struct smbXcli_req_state);
2549 uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2550 uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2551 uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
2552 struct smbXcli_tcon *tcon = state->tcon;
2553 struct smbXcli_session *session = state->session;
2554 uint8_t *fixed = state->smb2.pad;
2555 uint16_t fixed_len = 4;
2556 struct tevent_req *subreq;
2557 struct smbXcli_req_state *substate;
2558 NTSTATUS status;
2559
2560 SSVAL(fixed, 0, 0x04);
2561 SSVAL(fixed, 2, 0);
2562
2563 subreq = smb2cli_req_create(state, state->ev,
2564 state->conn,
2565 SMB2_OP_CANCEL,
2566 flags, 0,
2567 0, /* timeout */
2568 tcon, session,
2569 fixed, fixed_len,
2570 NULL, 0, 0);
2571 if (subreq == NULL) {
2572 return false;
2573 }
2574 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2575
2576 /*
2577 * clear everything but the SMB2_HDR_FLAG_ASYNC flag
2578 * e.g. if SMB2_HDR_FLAG_CHAINED is set we get INVALID_PARAMETER back
2579 */
2580 flags &= SMB2_HDR_FLAG_ASYNC;
2581
2582 if (flags & SMB2_HDR_FLAG_ASYNC) {
2583 mid = 0;
2584 }
2585
2586 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
2587 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2588 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
2589
2590 status = smb2cli_req_compound_submit(&subreq, 1);
2591 if (!NT_STATUS_IS_OK(status)) {
2592 TALLOC_FREE(subreq);
2593 return false;
2594 }
2595
2596 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2597
2598 return true;
2599 }
2600
2601 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2602 {
2603 /* we do not care about the result */
2604 TALLOC_FREE(subreq);
2605 }
2606
2607 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2608 struct tevent_context *ev,
2609 struct smbXcli_conn *conn,
2610 uint16_t cmd,
2611 uint32_t additional_flags,
2612 uint32_t clear_flags,
2613 uint32_t timeout_msec,
2614 struct smbXcli_tcon *tcon,
2615 struct smbXcli_session *session,
2616 const uint8_t *fixed,
2617 uint16_t fixed_len,
2618 const uint8_t *dyn,
2619 uint32_t dyn_len,
2620 uint32_t max_dyn_len)
2621 {
2622 struct tevent_req *req;
2623 struct smbXcli_req_state *state;
2624 uint32_t flags = 0;
2625 uint32_t tid = 0;
2626 uint64_t uid = 0;
2627 bool use_channel_sequence = false;
2628 uint16_t channel_sequence = 0;
2629
2630 req = tevent_req_create(mem_ctx, &state,
2631 struct smbXcli_req_state);
2632 if (req == NULL) {
2633 return NULL;
2634 }
2635
2636 state->ev = ev;
2637 state->conn = conn;
2638 state->session = session;
2639 state->tcon = tcon;
2640
2641 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2642 use_channel_sequence = true;
2643 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2644 use_channel_sequence = true;
2645 }
2646
2647 if (session) {
2648 uid = session->smb2->session_id;
2649
2650 if (use_channel_sequence) {
2651 channel_sequence = session->smb2->channel_sequence;
2652 }
2653
2654 state->smb2.should_sign = session->smb2->should_sign;
2655 state->smb2.should_encrypt = session->smb2->should_encrypt;
2656
2657 if (cmd == SMB2_OP_SESSSETUP &&
2658 session->smb2->signing_key.length != 0) {
2659 state->smb2.should_sign = true;
2660 }
2661
2662 if (cmd == SMB2_OP_SESSSETUP &&
2663 session->smb2_channel.signing_key.length == 0) {
2664 state->smb2.should_encrypt = false;
2665 }
2666 }
2667
2668 if (tcon) {
2669 tid = tcon->smb2.tcon_id;
2670
2671 if (tcon->smb2.should_encrypt) {
2672 state->smb2.should_encrypt = true;
2673 }
2674 }
2675
2676 if (state->smb2.should_encrypt) {
2677 state->smb2.should_sign = false;
2678 }
2679
2680 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2681 if (state->smb2.recv_iov == NULL) {
2682 TALLOC_FREE(req);
2683 return NULL;
2684 }
2685
2686 flags |= additional_flags;
2687 flags &= ~clear_flags;
2688
2689 state->smb2.fixed = fixed;
2690 state->smb2.fixed_len = fixed_len;
2691 state->smb2.dyn = dyn;
2692 state->smb2.dyn_len = dyn_len;
2693 state->smb2.max_dyn_len = max_dyn_len;
2694
2695 if (state->smb2.should_encrypt) {
2696 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2697 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2698 }
2699
2700 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
2701 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
2702 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
2703 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
2704 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
2705 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
2706 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
2707 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
2708
2709 switch (cmd) {
2710 case SMB2_OP_CANCEL:
2711 state->one_way = true;
2712 break;
2713 case SMB2_OP_BREAK:
2714 /*
2715 * If this is a dummy request, it will have
2716 * UINT64_MAX as message id.
2717 * If we send on break acknowledgement,
2718 * this gets overwritten later.
2719 */
2720 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2721 break;
2722 }
2723
2724 if (timeout_msec > 0) {
2725 struct timeval endtime;
2726
2727 endtime = timeval_current_ofs_msec(timeout_msec);
2728 if (!tevent_req_set_endtime(req, ev, endtime)) {
2729 return req;
2730 }
2731 }
2732
2733 return req;
2734 }
2735
2736 void smb2cli_req_set_notify_async(struct tevent_req *req)
2737 {
2738 struct smbXcli_req_state *state =
2739 tevent_req_data(req,
2740 struct smbXcli_req_state);
2741
2742 state->smb2.notify_async = true;
2743 }
2744
2745 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2746 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2747 TALLOC_CTX *tmp_mem,
2748 uint8_t *inbuf);
2749
2750 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2751 int num_reqs)
2752 {
2753 struct smbXcli_req_state *state;
2754 struct tevent_req *subreq;
2755 struct iovec *iov;
2756 int i, num_iov, nbt_len;
2757 int tf_iov = -1;
2758 const DATA_BLOB *encryption_key = NULL;
2759 uint64_t encryption_session_id = 0;
2760
2761 /*
2762 * 1 for the nbt length, optional TRANSFORM
2763 * per request: HDR, fixed, dyn, padding
2764 * -1 because the last one does not need padding
2765 */
2766
2767 iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
2768 if (iov == NULL) {
2769 return NT_STATUS_NO_MEMORY;
2770 }
2771
2772 num_iov = 1;
2773 nbt_len = 0;
2774
2775 /*
2776 * the session of the first request that requires encryption
2777 * specifies the encryption key.
2778 */
2779 for (i=0; i<num_reqs; i++) {
2780 if (!tevent_req_is_in_progress(reqs[i])) {
2781 return NT_STATUS_INTERNAL_ERROR;
2782 }
2783
2784 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2785
2786 if (!smbXcli_conn_is_connected(state->conn)) {
2787 return NT_STATUS_CONNECTION_DISCONNECTED;
2788 }
2789
2790 if ((state->conn->protocol != PROTOCOL_NONE) &&
2791 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2792 return NT_STATUS_REVISION_MISMATCH;
2793 }
2794
2795 if (state->session == NULL) {
2796 continue;
2797 }
2798
2799 if (!state->smb2.should_encrypt) {
2800 continue;
2801 }
2802
2803 encryption_key = &state->session->smb2->encryption_key;
2804 if (encryption_key->length == 0) {
2805 return NT_STATUS_INVALID_PARAMETER_MIX;
2806 }
2807
2808 encryption_session_id = state->session->smb2->session_id;
2809
2810 tf_iov = num_iov;
2811 iov[num_iov].iov_base = state->smb2.transform;
2812 iov[num_iov].iov_len = sizeof(state->smb2.transform);
2813 num_iov += 1;
2814
2815 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2816 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
2817 state->session->smb2->nonce_low);
2818 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
2819 state->session->smb2->nonce_high);
2820 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
2821 encryption_session_id);
2822
2823 state->session->smb2->nonce_low += 1;
2824 if (state->session->smb2->nonce_low == 0) {
2825 state->session->smb2->nonce_high += 1;
2826 state->session->smb2->nonce_low += 1;
2827 }
2828
2829 nbt_len += SMB2_TF_HDR_SIZE;
2830 break;
2831 }
2832
2833 for (i=0; i<num_reqs; i++) {
2834 int hdr_iov;
2835 size_t reqlen;
2836 bool ret;
2837 uint16_t opcode;
2838 uint64_t avail;
2839 uint16_t charge;
2840 uint16_t credits;
2841 uint64_t mid;
2842 const DATA_BLOB *signing_key = NULL;
2843
2844 if (!tevent_req_is_in_progress(reqs[i])) {
2845 return NT_STATUS_INTERNAL_ERROR;
2846 }
2847
2848 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2849
2850 if (!smbXcli_conn_is_connected(state->conn)) {
2851 return NT_STATUS_CONNECTION_DISCONNECTED;
2852 }
2853
2854 if ((state->conn->protocol != PROTOCOL_NONE) &&
2855 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2856 return NT_STATUS_REVISION_MISMATCH;
2857 }
2858
2859 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2860 if (opcode == SMB2_OP_CANCEL) {
2861 goto skip_credits;
2862 }
2863
2864 avail = UINT64_MAX - state->conn->smb2.mid;
2865 if (avail < 1) {
2866 return NT_STATUS_CONNECTION_ABORTED;
2867 }
2868
2869 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2870 uint32_t max_dyn_len = 1;
2871
2872 max_dyn_len = MAX(max_dyn_len, state->smb2.dyn_len);
2873 max_dyn_len = MAX(max_dyn_len, state->smb2.max_dyn_len);
2874
2875 charge = (max_dyn_len - 1)/ 65536 + 1;
2876 } else {
2877 charge = 1;
2878 }
2879
2880 charge = MAX(state->smb2.credit_charge, charge);
2881
2882 avail = MIN(avail, state->conn->smb2.cur_credits);
2883 if (avail < charge) {
2884 return NT_STATUS_INTERNAL_ERROR;
2885 }
2886
2887 credits = 0;
2888 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
2889 credits = state->conn->smb2.max_credits -
2890 state->conn->smb2.cur_credits;
2891 }
2892 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
2893 credits += 1;
2894 }
2895
2896 mid = state->conn->smb2.mid;
2897 state->conn->smb2.mid += charge;
2898 state->conn->smb2.cur_credits -= charge;
2899
2900 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2901 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
2902 }
2903 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
2904 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2905
2906 skip_credits:
2907 if (state->session && encryption_key == NULL) {
2908 /*
2909 * We prefer the channel signing key if it is
2910 * already there.
2911 */
2912 if (state->smb2.should_sign) {
2913 signing_key = &state->session->smb2_channel.signing_key;
2914 }
2915
2916 /*
2917 * If it is a channel binding, we already have the main
2918 * signing key and try that one.
2919 */
2920 if (signing_key && signing_key->length == 0) {
2921 signing_key = &state->session->smb2->signing_key;
2922 }
2923
2924 /*
2925 * If we do not have any session key yet, we skip the
2926 * signing of SMB2_OP_SESSSETUP requests.
2927 */
2928 if (signing_key && signing_key->length == 0) {
2929 signing_key = NULL;
2930 }
2931 }
2932
2933 hdr_iov = num_iov;
2934 iov[num_iov].iov_base = state->smb2.hdr;
2935 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
2936 num_iov += 1;
2937
2938 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2939 iov[num_iov].iov_len = state->smb2.fixed_len;
2940 num_iov += 1;
2941
2942 if (state->smb2.dyn != NULL) {
2943 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2944 iov[num_iov].iov_len = state->smb2.dyn_len;
2945 num_iov += 1;
2946 }
2947
2948 reqlen = sizeof(state->smb2.hdr);
2949 reqlen += state->smb2.fixed_len;
2950 reqlen += state->smb2.dyn_len;
2951
2952 if (i < num_reqs-1) {
2953 if ((reqlen % 8) > 0) {
2954 uint8_t pad = 8 - (reqlen % 8);
2955 iov[num_iov].iov_base = state->smb2.pad;
2956 iov[num_iov].iov_len = pad;
2957 num_iov += 1;
2958 reqlen += pad;
2959 }
2960 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
2961 }
2962
2963 state->smb2.encryption_session_id = encryption_session_id;
2964
2965 if (signing_key != NULL) {
2966 NTSTATUS status;
2967
2968 status = smb2_signing_sign_pdu(*signing_key,
2969 state->session->conn->protocol,
2970 &iov[hdr_iov], num_iov - hdr_iov);
2971 if (!NT_STATUS_IS_OK(status)) {
2972 return status;
2973 }
2974 }
2975
2976 nbt_len += reqlen;
2977
2978 ret = smbXcli_req_set_pending(reqs[i]);
2979 if (!ret) {
2980 return NT_STATUS_NO_MEMORY;
2981 }
2982 }
2983
2984 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
2985 _smb_setlen_tcp(state->length_hdr, nbt_len);
2986 iov[0].iov_base = state->length_hdr;
2987 iov[0].iov_len = sizeof(state->length_hdr);
2988
2989 if (encryption_key != NULL) {
2990 NTSTATUS status;
2991 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
2992 uint8_t *buf;
2993 int vi;
2994
2995 buf = talloc_array(iov, uint8_t, buflen);
2996 if (buf == NULL) {
2997 return NT_STATUS_NO_MEMORY;
2998 }
2999
3000 /*
3001 * We copy the buffers before encrypting them,
3002 * this is at least currently needed for the
3003 * to keep state->smb2.hdr.
3004 *
3005 * Also the callers may expect there buffers
3006 * to be const.
3007 */
3008 for (vi = tf_iov + 1; vi < num_iov; vi++) {
3009 struct iovec *v = &iov[vi];
3010 const uint8_t *o = (const uint8_t *)v->iov_base;
3011
3012 memcpy(buf, o, v->iov_len);
3013 v->iov_base = (void *)buf;
3014 buf += v->iov_len;
3015 }
3016
3017 status = smb2_signing_encrypt_pdu(*encryption_key,
3018 state->conn->protocol,
3019 &iov[tf_iov], num_iov - tf_iov);
3020 if (!NT_STATUS_IS_OK(status)) {
3021 return status;
3022 }
3023 }
3024
3025 if (state->conn->dispatch_incoming == NULL) {
3026 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3027 }
3028
3029 subreq = writev_send(state, state->ev, state->conn->outgoing,
3030 state->conn->write_fd, false, iov, num_iov);
3031 if (subreq == NULL) {
3032 return NT_STATUS_NO_MEMORY;
3033 }
3034 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
3035 return NT_STATUS_OK;
3036 }
3037
3038 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
3039 {
3040 struct smbXcli_req_state *state =
3041 tevent_req_data(req,
3042 struct smbXcli_req_state);
3043
3044 state->smb2.credit_charge = charge;
3045 }
3046
3047 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
3048 struct tevent_context *ev,
3049 struct smbXcli_conn *conn,
3050 uint16_t cmd,
3051 uint32_t additional_flags,
3052 uint32_t clear_flags,
3053 uint32_t timeout_msec,
3054 struct smbXcli_tcon *tcon,
3055 struct smbXcli_session *session,
3056 const uint8_t *fixed,
3057 uint16_t fixed_len,
3058 const uint8_t *dyn,
3059 uint32_t dyn_len,
3060 uint32_t max_dyn_len)
3061 {
3062 struct tevent_req *req;
3063 NTSTATUS status;
3064
3065 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
3066 additional_flags, clear_flags,
3067 timeout_msec,
3068 tcon, session,
3069 fixed, fixed_len,
3070 dyn, dyn_len,
3071 max_dyn_len);
3072 if (req == NULL) {
3073 return NULL;
3074 }
3075 if (!tevent_req_is_in_progress(req)) {
3076 return tevent_req_post(req, ev);
3077 }
3078 status = smb2cli_req_compound_submit(&req, 1);
3079 if (tevent_req_nterror(req, status)) {
3080 return tevent_req_post(req, ev);
3081 }
3082 return req;
3083 }
3084
3085 static void smb2cli_req_writev_done(struct tevent_req *subreq)
3086 {
3087 struct tevent_req *req =
3088 tevent_req_callback_data(subreq,
3089 struct tevent_req);
3090 struct smbXcli_req_state *state =
3091 tevent_req_data(req,
3092 struct smbXcli_req_state);
3093 ssize_t nwritten;
3094 int err;
3095
3096 nwritten = writev_recv(subreq, &err);
3097 TALLOC_FREE(subreq);
3098 if (nwritten == -1) {
3099 /* here, we need to notify all pending requests */
3100 NTSTATUS status = map_nt_error_from_unix_common(err);
3101 smbXcli_conn_disconnect(state->conn, status);
3102 return;
3103 }
3104 }
3105
3106 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3107 uint8_t *buf,
3108 size_t buflen,
3109 TALLOC_CTX *mem_ctx,
3110 struct iovec **piov, int *pnum_iov)
3111 {
3112 struct iovec *iov;
3113 int num_iov = 0;
3114 size_t taken = 0;
3115 uint8_t *first_hdr = buf;
3116 size_t verified_buflen = 0;
3117 uint8_t *tf = NULL;
3118 size_t tf_len = 0;
3119
3120 iov = talloc_array(mem_ctx, struct iovec, num_iov);
3121 if (iov == NULL) {
3122 return NT_STATUS_NO_MEMORY;
3123 }
3124
3125 while (taken < buflen) {
3126 size_t len = buflen - taken;
3127 uint8_t *hdr = first_hdr + taken;
3128 struct iovec *cur;
3129 size_t full_size;
3130 size_t next_command_ofs;
3131 uint16_t body_size;
3132 struct iovec *iov_tmp;
3133
3134 if (verified_buflen > taken) {
3135 len = verified_buflen - taken;
3136 } else {
3137 tf = NULL;
3138 tf_len = 0;
3139 }
3140
3141 if (len < 4) {
3142 DEBUG(10, ("%d bytes left, expected at least %d\n",
3143 (int)len, 4));
3144 goto inval;
3145 }
3146 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3147 struct smbXcli_session *s;
3148 uint64_t uid;
3149 struct iovec tf_iov[2];
3150 size_t enc_len;
3151 NTSTATUS status;
3152
3153 if (len < SMB2_TF_HDR_SIZE) {
3154 DEBUG(10, ("%d bytes left, expected at least %d\n",
3155 (int)len, SMB2_TF_HDR_SIZE));
3156 goto inval;
3157 }
3158 tf = hdr;
3159 tf_len = SMB2_TF_HDR_SIZE;
3160 taken += tf_len;
3161
3162 hdr = first_hdr + taken;
3163 enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3164 uid = BVAL(tf, SMB2_TF_SESSION_ID);
3165
3166 if (len < SMB2_TF_HDR_SIZE + enc_len) {
3167 DEBUG(10, ("%d bytes left, expected at least %d\n",
3168 (int)len,
3169 (int)(SMB2_TF_HDR_SIZE + enc_len)));
3170 goto inval;
3171 }
3172
3173 s = conn->sessions;
3174 for (; s; s = s->next) {
3175 if (s->smb2->session_id != uid) {
3176 continue;
3177 }
3178 break;
3179 }
3180
3181 if (s == NULL) {
3182 DEBUG(10, ("unknown session_id %llu\n",
3183 (unsigned long long)uid));
3184 goto inval;
3185 }
3186
3187 tf_iov[0].iov_base = (void *)tf;
3188 tf_iov[0].iov_len = tf_len;
3189 tf_iov[1].iov_base = (void *)hdr;
3190 tf_iov[1].iov_len = enc_len;
3191
3192 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3193 conn->protocol,
3194 tf_iov, 2);
3195 if (!NT_STATUS_IS_OK(status)) {
3196 TALLOC_FREE(iov);
3197 return status;
3198 }
3199
3200 verified_buflen = taken + enc_len;
3201 len = enc_len;
3202 }
3203
3204 /*
3205 * We need the header plus the body length field
3206 */
3207
3208 if (len < SMB2_HDR_BODY + 2) {
3209 DEBUG(10, ("%d bytes left, expected at least %d\n",
3210 (int)len, SMB2_HDR_BODY));
3211 goto inval;
3212 }
3213 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3214 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3215 IVAL(hdr, 0)));
3216 goto inval;
3217 }
3218 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3219 DEBUG(10, ("Got HDR len %d, expected %d\n",
3220 SVAL(hdr, 4), SMB2_HDR_BODY));
3221 goto inval;
3222 }
3223
3224 full_size = len;
3225 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3226 body_size = SVAL(hdr, SMB2_HDR_BODY);
3227
3228 if (next_command_ofs != 0) {
3229 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3230 goto inval;
3231 }
3232 if (next_command_ofs > full_size) {
3233 goto inval;
3234 }
3235 full_size = next_command_ofs;
3236 }
3237 if (body_size < 2) {
3238 goto inval;
3239 }
3240 body_size &= 0xfffe;
3241
3242 if (body_size > (full_size - SMB2_HDR_BODY)) {
3243 goto inval;
3244 }
3245
3246 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3247 num_iov + 4);
3248 if (iov_tmp == NULL) {
3249 TALLOC_FREE(iov);
3250 return NT_STATUS_NO_MEMORY;
3251 }
3252 iov = iov_tmp;
3253 cur = &iov[num_iov];
3254 num_iov += 4;
3255
3256 cur[0].iov_base = tf;
3257 cur[0].iov_len = tf_len;
3258 cur[1].iov_base = hdr;
3259 cur[1].iov_len = SMB2_HDR_BODY;
3260 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3261 cur[2].iov_len = body_size;
3262 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3263 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3264
3265 taken += full_size;
3266 }
3267
3268 *piov = iov;
3269 *pnum_iov = num_iov;
3270 return NT_STATUS_OK;
3271
3272 inval:
3273 TALLOC_FREE(iov);
3274 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3275 }
3276
3277 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3278 uint64_t mid)
3279 {
3280 size_t num_pending = talloc_array_length(conn->pending);
3281 size_t i;
3282
3283 for (i=0; i<num_pending; i++) {
3284 struct tevent_req *req = conn->pending[i];
3285 struct smbXcli_req_state *state =
3286 tevent_req_data(req,
3287 struct smbXcli_req_state);
3288
3289 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3290 return req;
3291 }
3292 }
3293 return NULL;
3294 }
3295
3296 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3297 TALLOC_CTX *tmp_mem,
3298 uint8_t *inbuf)
3299 {
3300 struct tevent_req *req;
3301 struct smbXcli_req_state *state = NULL;
3302 struct iovec *iov;
3303 int i, num_iov;
3304 NTSTATUS status;
3305 bool defer = true;
3306 struct smbXcli_session *last_session = NULL;
3307 size_t inbuf_len = smb_len_tcp(inbuf);
3308
3309 status = smb2cli_inbuf_parse_compound(conn,
3310 inbuf + NBT_HDR_SIZE,
3311 inbuf_len,
3312 tmp_mem,
3313 &iov, &num_iov);
3314 if (!NT_STATUS_IS_OK(status)) {
3315 return status;
3316 }
3317
3318 for (i=0; i<num_iov; i+=4) {
3319 uint8_t *inbuf_ref = NULL;
3320 struct iovec *cur = &iov[i];
3321 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3322 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3323 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3324 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3325 uint16_t req_opcode;
3326 uint32_t req_flags;
3327 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3328 uint32_t new_credits;
3329 struct smbXcli_session *session = NULL;
3330 const DATA_BLOB *signing_key = NULL;
3331 bool was_encrypted = false;
3332
3333 new_credits = conn->smb2.cur_credits;
3334 new_credits += credits;
3335 if (new_credits > UINT16_MAX) {
3336 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3337 }
3338 conn->smb2.cur_credits += credits;
3339
3340 req = smb2cli_conn_find_pending(conn, mid);
3341 if (req == NULL) {
3342 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3343 }
3344 state = tevent_req_data(req, struct smbXcli_req_state);
3345
3346 state->smb2.got_async = false;
3347
3348 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3349 if (opcode != req_opcode) {
3350 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3351 }
3352 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3353
3354 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3355 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3356 }
3357
3358 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3359 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3360 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3361 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3362
3363 /*
3364 * async interim responses are not signed,
3365 * even if the SMB2_HDR_FLAG_SIGNED flag
3366 * is set.
3367 */
3368 req_flags |= SMB2_HDR_FLAG_ASYNC;
3369 SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
3370 SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
3371
3372 if (state->smb2.notify_async) {
3373 state->smb2.got_async = true;
3374 tevent_req_defer_callback(req, state->ev);
3375 tevent_req_notify_callback(req);
3376 }
3377 continue;
3378 }
3379
3380 session = state->session;
3381 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3382 session = last_session;
3383 }
3384 last_session = session;
3385
3386 if (state->smb2.should_sign) {
3387 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3388 return NT_STATUS_ACCESS_DENIED;
3389 }
3390 }
3391
3392 if (flags & SMB2_HDR_FLAG_SIGNED) {
3393 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3394
3395 if (session == NULL) {
3396 struct smbXcli_session *s;
3397
3398 s = state->conn->sessions;
3399 for (; s; s = s->next) {
3400 if (s->smb2->session_id != uid) {
3401 continue;
3402 }
3403
3404 session = s;
3405 break;
3406 }
3407 }
3408
3409 if (session == NULL) {
3410 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3411 }
3412
3413 last_session = session;
3414 signing_key = &session->smb2_channel.signing_key;
3415 }
3416
3417 if (opcode == SMB2_OP_SESSSETUP) {
3418 /*
3419 * We prefer the channel signing key, if it is
3420 * already there.
3421 *
3422 * If we do not have a channel signing key yet,
3423 * we try the main signing key, if it is not
3424 * the final response.
3425 */
3426 if (signing_key && signing_key->length == 0 &&
3427 !NT_STATUS_IS_OK(status)) {
3428 signing_key = &session->smb2->signing_key;
3429 }
3430
3431 if (signing_key && signing_key->length == 0) {
3432 /*
3433 * If we do not have a session key to
3434 * verify the signature, we defer the
3435 * signing check to the caller.
3436 *
3437 * The caller gets NT_STATUS_OK, it
3438 * has to call
3439 * smb2cli_session_set_session_key()
3440 * or
3441 * smb2cli_session_set_channel_key()
3442 * which will check the signature
3443 * with the channel signing key.
3444 */
3445 signing_key = NULL;
3446 }
3447 }
3448
3449 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3450 const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3451 uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3452
3453 /*
3454 * If the response was encrypted in a SMB2_TRANSFORM
3455 * pdu, which belongs to the correct session,
3456 * we do not need to do signing checks
3457 *
3458 * It could be the session the response belongs to
3459 * or the session that was used to encrypt the
3460 * SMB2_TRANSFORM request.
3461 */
3462 if ((session && session->smb2->session_id == uid) ||
3463 (state->smb2.encryption_session_id == uid)) {
3464 signing_key = NULL;
3465 was_encrypted = true;
3466 }
3467 }
3468
3469 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3470 /*
3471 * if the server returns NT_STATUS_USER_SESSION_DELETED
3472 * the response is not signed and we should
3473 * propagate the NT_STATUS_USER_SESSION_DELETED
3474 * status to the caller.
3475 */
3476 state->smb2.signing_skipped = true;
3477 signing_key = NULL;
3478 }
3479
3480 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3481 /*
3482 * if the server returns
3483 * NT_STATUS_INVALID_PARAMETER
3484 * the response might not be encrypted.
3485 */
3486 if (state->smb2.should_encrypt && !was_encrypted) {
3487 state->smb2.signing_skipped = true;
3488 signing_key = NULL;
3489 }
3490 }
3491
3492 if (state->smb2.should_encrypt && !was_encrypted) {
3493 if (!state->smb2.signing_skipped) {
3494 return NT_STATUS_ACCESS_DENIED;
3495 }
3496 }
3497
3498 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3499 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3500 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3501 /*
3502 * if the server returns
3503 * NT_STATUS_NETWORK_NAME_DELETED
3504 * NT_STATUS_FILE_CLOSED
3505 * NT_STATUS_INVALID_PARAMETER
3506 * the response might not be signed
3507 * as this happens before the signing checks.
3508 *
3509 * If server echos the signature (or all zeros)
3510 * we should report the status from the server
3511 * to the caller.
3512 */
3513 if (signing_key) {
3514 int cmp;
3515
3516 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3517 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3518 16);
3519 if (cmp == 0) {
3520 state->smb2.signing_skipped = true;
3521 signing_key = NULL;
3522 }
3523 }
3524 if (signing_key) {
3525 int cmp;
3526 static const uint8_t zeros[16];
3527
3528 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3529 zeros,
3530 16);
3531 if (cmp == 0) {
3532 state->smb2.signing_skipped = true;
3533 signing_key = NULL;
3534 }
3535 }
3536 }
3537
3538 if (signing_key) {
3539 status = smb2_signing_check_pdu(*signing_key,
3540 state->conn->protocol,
3541 &cur[1], 3);
3542 if (!NT_STATUS_IS_OK(status)) {
3543 /*
3544 * If the signing check fails, we disconnect
3545 * the connection.
3546 */
3547 return status;
3548 }
3549 }
3550
3551 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
3552 (session != NULL) && session->disconnect_expired)
3553 {
3554 /*
3555 * this should be a short term hack
3556 * until the upper layers have implemented
3557 * re-authentication.
3558 */
3559 return status;
3560 }
3561
3562 smbXcli_req_unset_pending(req);
3563
3564 /*
3565 * There might be more than one response
3566 * we need to defer the notifications
3567 */
3568 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3569 defer = false;
3570 }
3571
3572 if (defer) {
3573 tevent_req_defer_callback(req, state->ev);
3574 }
3575
3576 /*
3577 * Note: here we use talloc_reference() in a way
3578 * that does not expose it to the caller.
3579 */
3580 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3581 if (tevent_req_nomem(inbuf_ref, req)) {
3582 continue;
3583 }
3584
3585 /* copy the related buffers */
3586 state->smb2.recv_iov[0] = cur[1];
3587 state->smb2.recv_iov[1] = cur[2];
3588 state->smb2.recv_iov[2] = cur[3];
3589
3590 tevent_req_done(req);
3591 }
3592
3593 if (defer) {
3594 return NT_STATUS_RETRY;
3595 }
3596
3597 return NT_STATUS_OK;
3598 }
3599
3600 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3601 struct iovec **piov,
3602 const struct smb2cli_req_expected_response *expected,
3603 size_t num_expected)
3604 {
3605 struct smbXcli_req_state *state =
3606 tevent_req_data(req,
3607 struct smbXcli_req_state);
3608 NTSTATUS status;
3609 size_t body_size;
3610 bool found_status = false;
3611 bool found_size = false;
3612 size_t i;
3613
3614 if (piov != NULL) {
3615 *piov = NULL;
3616 }
3617
3618 if (state->smb2.got_async) {
3619 return STATUS_PENDING;
3620 }
3621
3622 if (tevent_req_is_nterror(req, &status)) {
3623 for (i=0; i < num_expected; i++) {
3624 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3625 found_status = true;
3626 break;
3627 }
3628 }
3629
3630 if (found_status) {
3631 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3632 }
3633
3634 return status;
3635 }
3636
3637 if (num_expected == 0) {
3638 found_status = true;
3639 found_size = true;
3640 }
3641
3642 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3643 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3644
3645 for (i=0; i < num_expected; i++) {
3646 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3647 continue;
3648 }
3649
3650 found_status = true;
3651 if (expected[i].body_size == 0) {
3652 found_size = true;
3653 break;
3654 }
3655
3656 if (expected[i].body_size == body_size) {
3657 found_size = true;
3658 break;
3659 }
3660 }
3661
3662 if (!found_status) {
3663 return status;
3664 }
3665
3666 if (state->smb2.signing_skipped) {
3667 if (num_expected > 0) {
3668 return NT_STATUS_ACCESS_DENIED;
3669 }
3670 if (!NT_STATUS_IS_ERR(status)) {
3671 return NT_STATUS_ACCESS_DENIED;
3672 }
3673 }
3674
3675 if (!found_size) {
3676 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3677 }
3678
3679 if (piov != NULL) {
3680 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3681 }
3682
3683 return status;
3684 }
3685
3686 static const struct {
3687 enum protocol_types proto;
3688 const char *smb1_name;
3689 } smb1cli_prots[] = {
3690 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
3691 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
3692 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
3693 {PROTOCOL_LANMAN1, "LANMAN1.0"},
3694 {PROTOCOL_LANMAN2, "LM1.2X002"},
3695 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
3696 {PROTOCOL_LANMAN2, "LANMAN2.1"},
3697 {PROTOCOL_LANMAN2, "Samba"},
3698 {PROTOCOL_NT1, "NT LANMAN 1.0"},
3699 {PROTOCOL_NT1, "NT LM 0.12"},
3700 {PROTOCOL_SMB2_02, "SMB 2.002"},
3701 {PROTOCOL_SMB2_10, "SMB 2.???"},
3702 };
3703
3704 static const struct {
3705 enum protocol_types proto;
3706 uint16_t smb2_dialect;
3707 } smb2cli_prots[] = {
3708 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
3709 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
3710 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
3711 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
3712 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
3713 {PROTOCOL_SMB3_02, SMB3_DIALECT_REVISION_302},
3714 };
3715
3716 struct smbXcli_negprot_state {
3717 struct smbXcli_conn *conn;
3718 struct tevent_context *ev;
3719 uint32_t timeout_msec;
3720 enum protocol_types min_protocol;
3721 enum protocol_types max_protocol;
3722
3723 struct {
3724 uint8_t fixed[36];
3725 uint8_t dyn[ARRAY_SIZE(smb2cli_prots)*2];
3726 } smb2;
3727 };
3728
3729 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3730 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3731 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3732 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3733 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3734 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3735 TALLOC_CTX *frame,
3736 uint8_t *inbuf);
3737
3738 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3739 struct tevent_context *ev,
3740 struct smbXcli_conn *conn,
3741 uint32_t timeout_msec,
3742 enum protocol_types min_protocol,
3743 enum protocol_types max_protocol)
3744 {
3745 struct tevent_req *req, *subreq;
3746 struct smbXcli_negprot_state *state;
3747
3748 req = tevent_req_create(mem_ctx, &state,
3749 struct smbXcli_negprot_state);
3750 if (req == NULL) {
3751 return NULL;
3752 }
3753 state->conn = conn;
3754 state->ev = ev;
3755 state->timeout_msec = timeout_msec;
3756 state->min_protocol = min_protocol;
3757 state->max_protocol = max_protocol;
3758
3759 if (min_protocol == PROTOCOL_NONE) {
3760 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3761 return tevent_req_post(req, ev);
3762 }
3763
3764 if (max_protocol == PROTOCOL_NONE) {
3765 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3766 return tevent_req_post(req, ev);
3767 }
3768
3769 if (min_protocol > max_protocol) {
3770 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3771 return tevent_req_post(req, ev);
3772 }
3773
3774 if ((min_protocol < PROTOCOL_SMB2_02) &&
3775 (max_protocol < PROTOCOL_SMB2_02)) {
3776 /*
3777 * SMB1 only...
3778 */
3779 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3780
3781 subreq = smbXcli_negprot_smb1_subreq(state);
3782 if (tevent_req_nomem(subreq, req)) {
3783 return tevent_req_post(req, ev);
3784 }
3785 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3786 return req;
3787 }
3788
3789 if ((min_protocol >= PROTOCOL_SMB2_02) &&
3790 (max_protocol >= PROTOCOL_SMB2_02)) {
3791 /*
3792 * SMB2 only...
3793 */
3794 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3795
3796 subreq = smbXcli_negprot_smb2_subreq(state);
3797 if (tevent_req_nomem(subreq, req)) {
3798 return tevent_req_post(req, ev);
3799 }
3800 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3801 return req;
3802 }
3803
3804 /*
3805 * We send an SMB1 negprot with the SMB2 dialects
3806 * and expect a SMB1 or a SMB2 response.
3807 *
3808 * smbXcli_negprot_dispatch_incoming() will fix the
3809 * callback to match protocol of the response.
3810 */
3811 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
3812
3813 subreq = smbXcli_negprot_smb1_subreq(state);
3814 if (tevent_req_nomem(subreq, req)) {
3815 return tevent_req_post(req, ev);
3816 }
3817 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
3818 return req;
3819 }
3820
3821 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
3822 {
3823 struct tevent_req *req =
3824 tevent_req_callback_data(subreq,
3825 struct tevent_req);
3826 NTSTATUS status;
3827
3828 /*
3829 * we just want the low level error
3830 */
3831 status = tevent_req_simple_recv_ntstatus(subreq);
3832 TALLOC_FREE(subreq);
3833 if (tevent_req_nterror(req, status)) {
3834 return;
3835 }
3836
3837 /* this should never happen */
3838 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
3839 }
3840
3841 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
3842 {
3843 size_t i;
3844 DATA_BLOB bytes = data_blob_null;
3845 uint8_t flags;
3846 uint16_t flags2;
3847
3848 /* setup the protocol strings */
3849 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3850 uint8_t c = 2;
3851 bool ok;
3852
3853 if (smb1cli_prots[i].proto < state->min_protocol) {
3854 continue;
3855 }
3856
3857 if (smb1cli_prots[i].proto > state->max_protocol) {
3858 continue;
3859 }
3860
3861 ok = data_blob_append(state, &bytes, &c, sizeof(c));
3862 if (!ok) {
3863 return NULL;
3864 }
3865
3866 /*
3867 * We now it is already ascii and
3868 * we want NULL termination.
3869 */
3870 ok = data_blob_append(state, &bytes,
3871 smb1cli_prots[i].smb1_name,
3872 strlen(smb1cli_prots[i].smb1_name)+1);
3873 if (!ok) {
3874 return NULL;
3875 }
3876 }
3877
3878 smb1cli_req_flags(state->max_protocol,
3879 state->conn->smb1.client.capabilities,
3880 SMBnegprot,
3881 0, 0, &flags,
3882 0, 0, &flags2);
3883
3884 return smb1cli_req_send(state, state->ev, state->conn,
3885 SMBnegprot,
3886 flags, ~flags,
3887 flags2, ~flags2,
3888 state->timeout_msec,
3889 0xFFFE, 0, NULL, /* pid, tid, session */
3890 0, NULL, /* wct, vwv */
3891 bytes.length, bytes.data);
3892 }
3893
3894 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
3895 {
3896 struct tevent_req *req =
3897 tevent_req_callback_data(subreq,
3898 struct tevent_req);
3899 struct smbXcli_negprot_state *state =
3900 tevent_req_data(req,
3901 struct smbXcli_negprot_state);
3902 struct smbXcli_conn *conn = state->conn;
3903 struct iovec *recv_iov = NULL;
3904 uint8_t *inhdr;
3905 uint8_t wct;
3906 uint16_t *vwv;
3907 uint32_t num_bytes;
3908 uint8_t *bytes;
3909 NTSTATUS status;
3910 uint16_t protnum;
3911 size_t i;
3912 size_t num_prots = 0;
3913 uint8_t flags;
3914 uint32_t client_capabilities = conn->smb1.client.capabilities;
3915 uint32_t both_capabilities;
3916 uint32_t server_capabilities = 0;
3917 uint32_t capabilities;
3918 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
3919 uint32_t server_max_xmit = 0;
3920 uint32_t max_xmit;
3921 uint32_t server_max_mux = 0;
3922 uint16_t server_security_mode = 0;
3923 uint32_t server_session_key = 0;
3924 bool server_readbraw = false;
3925 bool server_writebraw = false;
3926 bool server_lockread = false;
3927 bool server_writeunlock = false;
3928 struct GUID server_guid = GUID_zero();
3929 DATA_BLOB server_gss_blob = data_blob_null;
3930 uint8_t server_challenge[8];
3931 char *server_workgroup = NULL;
3932 char *server_name = NULL;
3933 int server_time_zone = 0;
3934 NTTIME server_system_time = 0;
3935 static const struct smb1cli_req_expected_response expected[] = {
3936 {
3937 .status = NT_STATUS_OK,
3938 .wct = 0x11, /* NT1 */
3939 },
3940 {
3941 .status = NT_STATUS_OK,
3942 .wct = 0x0D, /* LM */
3943 },
3944 {
3945 .status = NT_STATUS_OK,
3946 .wct = 0x01, /* CORE */
3947 }
3948 };
3949
3950 ZERO_STRUCT(server_challenge);
3951
3952 status = smb1cli_req_recv(subreq, state,
3953 &recv_iov,
3954 &inhdr,
3955 &wct,
3956 &vwv,
3957 NULL, /* pvwv_offset */
3958 &num_bytes,
3959 &bytes,
3960 NULL, /* pbytes_offset */
3961 NULL, /* pinbuf */
3962 expected, ARRAY_SIZE(expected));
3963 TALLOC_FREE(subreq);
3964 if (tevent_req_nterror(req, status)) {
3965 return;
3966 }
3967
3968 flags = CVAL(inhdr, HDR_FLG);
3969
3970 protnum = SVAL(vwv, 0);
3971
3972 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3973 if (smb1cli_prots[i].proto < state->min_protocol) {
3974 continue;
3975 }
3976
3977 if (smb1cli_prots[i].proto > state->max_protocol) {
3978 continue;
3979 }
3980
3981 if (protnum != num_prots) {
3982 num_prots++;
3983 continue;
3984 }
3985
3986 conn->protocol = smb1cli_prots[i].proto;
3987 break;
3988 }
3989
3990 if (conn->protocol == PROTOCOL_NONE) {
3991 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3992 return;
3993 }
3994
3995 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
3996 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
3997 "and the selected protocol level doesn't support it.\n"));
3998 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3999 return;
4000 }
4001
4002 if (flags & FLAG_SUPPORT_LOCKREAD) {
4003 server_lockread = true;
4004 server_writeunlock = true;
4005 }
4006
4007 if (conn->protocol >= PROTOCOL_NT1) {
4008 const char *client_signing = NULL;
4009 bool server_mandatory = false;
4010 bool server_allowed = false;
4011 const char *server_signing = NULL;
4012 bool ok;
4013 uint8_t key_len;
4014
4015 if (wct != 0x11) {
4016 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4017 return;
4018 }
4019
4020 /* NT protocol */
4021 server_security_mode = CVAL(vwv + 1, 0);
4022 server_max_mux = SVAL(vwv + 1, 1);
4023 server_max_xmit = IVAL(vwv + 3, 1);
4024 server_session_key = IVAL(vwv + 7, 1);
4025 server_time_zone = SVALS(vwv + 15, 1);
4026 server_time_zone *= 60;
4027 /* this time arrives in real GMT */
4028 server_system_time = BVAL(vwv + 11, 1);
4029 server_capabilities = IVAL(vwv + 9, 1);
4030
4031 key_len = CVAL(vwv + 16, 1);
4032
4033 if (server_capabilities & CAP_RAW_MODE) {
4034 server_readbraw = true;
4035 server_writebraw = true;
4036 }
4037 if (server_capabilities & CAP_LOCK_AND_READ) {
4038 server_lockread = true;
4039 }
4040
4041 if (server_capabilities & CAP_EXTENDED_SECURITY) {
4042 DATA_BLOB blob1, blob2;
4043
4044 if (num_bytes < 16) {
4045 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4046 return;
4047 }
4048
4049 blob1 = data_blob_const(bytes, 16);
4050 status = GUID_from_data_blob(&blob1, &server_guid);
4051 if (tevent_req_nterror(req, status)) {
4052 return;
4053 }
4054
4055 blob1 = data_blob_const(bytes+16, num_bytes-16);
4056 blob2 = data_blob_dup_talloc(state, blob1);
4057 if (blob1.length > 0 &&
4058 tevent_req_nomem(blob2.data, req)) {
4059 return;
4060 }
4061 server_gss_blob = blob2;
4062 } else {
4063 DATA_BLOB blob1, blob2;
4064
4065 if (num_bytes < key_len) {
4066 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4067 return;
4068 }
4069
4070 if (key_len != 0 && key_len != 8) {
4071 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4072 return;
4073 }
4074
4075 if (key_len == 8) {
4076 memcpy(server_challenge, bytes, 8);
4077 }
4078
4079 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4080 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
4081 if (blob1.length > 0) {
4082 size_t len;
4083
4084 len = utf16_len_n(blob1.data,
4085 blob1.length);
4086 blob1.length = len;
4087
4088 ok = convert_string_talloc(state,
4089 CH_UTF16LE,
4090 CH_UNIX,
4091 blob1.data,
4092 blob1.length,
4093 &server_workgroup,
4094 &len);
4095 if (!ok) {
4096 status = map_nt_error_from_unix_common(errno);
4097 tevent_req_nterror(req, status);
4098 return;
4099 }
4100 }
4101
4102 blob2.data += blob1.length;
4103 blob2.length -= blob1.length;
4104 if (blob2.length > 0) {
4105 size_t len;
4106
4107 len = utf16_len_n(blob1.data,
4108 blob1.length);
4109 blob1.length = len;
4110
4111 ok = convert_string_talloc(state,
4112 CH_UTF16LE,
4113 CH_UNIX,
4114 blob2.data,
4115 blob2.length,
4116 &server_name,
4117 &len);
4118 if (!ok) {
4119 status = map_nt_error_from_unix_common(errno);
4120 tevent_req_nterror(req, status);
4121 return;
4122 }
4123 }
4124 }
4125
4126 client_signing = "disabled";
4127 if (conn->allow_signing) {
4128 client_signing = "allowed";
4129 }
4130 if (conn->mandatory_signing) {
4131 client_signing = "required";
4132 }
4133
4134 server_signing = "not supported";
4135 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4136 server_signing = "supported";
4137 server_allowed = true;
4138 } else if (conn->mandatory_signing) {
4139 /*
4140 * We have mandatory signing as client
4141 * lets assume the server will look at our
4142 * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4143 * flag in the session setup
4144 */
4145 server_signing = "not announced";
4146 server_allowed = true;
4147 }
4148 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4149 server_signing = "required";
4150 server_mandatory = true;
4151 }
4152
4153 ok = smb_signing_set_negotiated(conn->smb1.signing,
4154 server_allowed,
4155 server_mandatory);
4156 if (!ok) {
4157 DEBUG(1,("cli_negprot: SMB signing is required, "
4158 "but client[%s] and server[%s] mismatch\n",
4159 client_signing, server_signing));
4160 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4161 return;
4162 }
4163
4164 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4165 DATA_BLOB blob1;
4166 uint8_t key_len;
4167 time_t t;
4168
4169 if (wct != 0x0D) {
4170 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4171 return;
4172 }
4173
4174 server_security_mode = SVAL(vwv + 1, 0);
4175 server_max_xmit = SVAL(vwv + 2, 0);
4176 server_max_mux = SVAL(vwv + 3, 0);
4177 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4178 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4179 server_session_key = IVAL(vwv + 6, 0);
4180 server_time_zone = SVALS(vwv + 10, 0);
4181 server_time_zone *= 60;
4182 /* this time is converted to GMT by make_unix_date */
4183 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4184 unix_to_nt_time(&server_system_time, t);
4185 key_len = SVAL(vwv + 11, 0);
4186
4187 if (num_bytes < key_len) {
4188 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4189 return;
4190 }
4191
4192 if (key_len != 0 && key_len != 8) {
4193 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4194 return;
4195 }
4196
4197 if (key_len == 8) {
4198 memcpy(server_challenge, bytes, 8);
4199 }
4200
4201 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4202 if (blob1.length > 0) {
4203 size_t len;
4204 bool ok;
4205
4206 len = utf16_len_n(blob1.data,
4207 blob1.length);
4208 blob1.length = len;
4209
4210 ok = convert_string_talloc(state,
4211 CH_DOS,
4212 CH_UNIX,
4213 blob1.data,
4214 blob1.length,
4215 &server_workgroup,
4216 &len);
4217 if (!ok) {
4218 status = map_nt_error_from_unix_common(errno);
4219 tevent_req_nterror(req, status);
4220 return;
4221 }
4222 }
4223
4224 } else {
4225 /* the old core protocol */
4226 server_time_zone = get_time_zone(time(NULL));
4227 server_max_xmit = 1024;
4228 server_max_mux = 1;
4229 }
4230
4231 if (server_max_xmit < 1024) {
4232 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4233 return;
4234 }
4235
4236 if (server_max_mux < 1) {
4237 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4238 return;
4239 }
4240
4241 /*
4242 * Now calculate the negotiated capabilities
4243 * based on the mask for:
4244 * - client only flags
4245 * - flags used in both directions
4246 * - server only flags
4247 */
4248 both_capabilities = client_capabilities & server_capabilities;
4249 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4250 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4251 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4252
4253 max_xmit = MIN(client_max_xmit, server_max_xmit);
4254
4255 conn->smb1.server.capabilities = server_capabilities;
4256 conn->smb1.capabilities = capabilities;
4257
4258 conn->smb1.server.max_xmit = server_max_xmit;
4259 conn->smb1.max_xmit = max_xmit;
4260
4261 conn->smb1.server.max_mux = server_max_mux;
4262
4263 conn->smb1.server.security_mode = server_security_mode;
4264
4265 conn->smb1.server.readbraw = server_readbraw;
4266 conn->smb1.server.writebraw = server_writebraw;
4267 conn->smb1.server.lockread = server_lockread;
4268 conn->smb1.server.writeunlock = server_writeunlock;
4269
4270 conn->smb1.server.session_key = server_session_key;
4271
4272 talloc_steal(conn, server_gss_blob.data);
4273 conn->smb1.server.gss_blob = server_gss_blob;
4274 conn->smb1.server.guid = server_guid;
4275 memcpy(conn->smb1.server.challenge, server_challenge, 8);
4276 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4277 conn->smb1.server.name = talloc_move(conn, &server_name);
4278
4279 conn->smb1.server.time_zone = server_time_zone;
4280 conn->smb1.server.system_time = server_system_time;
4281
4282 tevent_req_done(req);
4283 }
4284
4285 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4286 {
4287 size_t i;
4288 uint8_t *buf;
4289 uint16_t dialect_count = 0;
4290
4291 buf = state->smb2.dyn;
4292 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4293 if (smb2cli_prots[i].proto < state->min_protocol) {
4294 continue;
4295 }
4296
4297 if (smb2cli_prots[i].proto > state->max_protocol) {
4298 continue;
4299 }
4300
4301 SSVAL(buf, dialect_count*2, smb2cli_prots[i].smb2_dialect);
4302 dialect_count++;
4303 }
4304
4305 buf = state->smb2.fixed;
4306 SSVAL(buf, 0, 36);
4307 SSVAL(buf, 2, dialect_count);
4308 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4309 SSVAL(buf, 6, 0); /* Reserved */
4310 if (state->max_protocol >= PROTOCOL_SMB2_22) {
4311 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4312 } else {
4313 SIVAL(buf, 8, 0); /* Capabilities */
4314 }
4315 if (state->max_protocol >= PROTOCOL_SMB2_10) {
4316 NTSTATUS status;
4317 DATA_BLOB blob;
4318
4319 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4320 state, &blob);
4321 if (!NT_STATUS_IS_OK(status)) {
4322 return NULL;
4323 }
4324 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4325 } else {
4326 memset(buf+12, 0, 16); /* ClientGuid */
4327 }
4328 SBVAL(buf, 28, 0); /* ClientStartTime */
4329
4330 return smb2cli_req_send(state, state->ev,
4331 state->conn, SMB2_OP_NEGPROT,
4332 0, 0, /* flags */
4333 state->timeout_msec,
4334 NULL, NULL, /* tcon, session */
4335 state->smb2.fixed, sizeof(state->smb2.fixed),
4336 state->smb2.dyn, dialect_count*2,
4337 UINT16_MAX); /* max_dyn_len */
4338 }
4339
4340 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4341 {
4342 struct tevent_req *req =
4343 tevent_req_callback_data(subreq,
4344 struct tevent_req);
4345 struct smbXcli_negprot_state *state =
4346 tevent_req_data(req,
4347 struct smbXcli_negprot_state);
4348 struct smbXcli_conn *conn = state->conn;
4349 size_t security_offset, security_length;
4350 DATA_BLOB blob;
4351 NTSTATUS status;
4352 struct iovec *iov;
4353 uint8_t *body;
4354 size_t i;
4355 uint16_t dialect_revision;
4356 static const struct smb2cli_req_expected_response expected[] = {
4357 {
4358 .status = NT_STATUS_OK,
4359 .body_size = 0x41
4360 }
4361 };
4362
4363 status = smb2cli_req_recv(subreq, state, &iov,
4364 expected, ARRAY_SIZE(expected));
4365 TALLOC_FREE(subreq);
4366 if (tevent_req_nterror(req, status)) {
4367 return;
4368 }
4369
4370 body = (uint8_t *)iov[1].iov_base;
4371
4372 dialect_revision = SVAL(body, 4);
4373
4374 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4375 if (smb2cli_prots[i].proto < state->min_protocol) {
4376 continue;
4377 }
4378
4379 if (smb2cli_prots[i].proto > state->max_protocol) {
4380 continue;
4381 }
4382
4383 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4384 continue;
4385 }
4386
4387 conn->protocol = smb2cli_prots[i].proto;
4388 break;
4389 }
4390
4391 if (conn->protocol == PROTOCOL_NONE) {
4392 if (state->min_protocol >= PROTOCOL_SMB2_02) {
4393 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4394 return;
4395 }
4396
4397 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4398 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4399 return;
4400 }
4401
4402 /* make sure we do not loop forever */
4403 state->min_protocol = PROTOCOL_SMB2_02;
4404
4405 /*
4406 * send a SMB2 negprot, in order to negotiate
4407 * the SMB2 dialect.
4408 */
4409 subreq = smbXcli_negprot_smb2_subreq(state);
4410 if (tevent_req_nomem(subreq, req)) {
4411 return;
4412 }
4413 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4414 return;
4415 }
4416
4417 conn->smb2.server.security_mode = SVAL(body, 2);
4418
4419 blob = data_blob_const(body + 8, 16);
4420 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4421 if (tevent_req_nterror(req, status)) {
4422 return;
4423 }
4424
4425 conn->smb2.server.capabilities = IVAL(body, 24);
4426 conn->smb2.server.max_trans_size= IVAL(body, 28);
4427 conn->smb2.server.max_read_size = IVAL(body, 32);
4428 conn->smb2.server.max_write_size= IVAL(body, 36);
4429 conn->smb2.server.system_time = BVAL(body, 40);
4430 conn->smb2.server.start_time = BVAL(body, 48);
4431
4432 security_offset = SVAL(body, 56);
4433 security_length = SVAL(body, 58);
4434
4435 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4436 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4437 return;
4438 }
4439
4440 if (security_length > iov[2].iov_len) {
4441 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4442 return;
4443 }
4444
4445 conn->smb2.server.gss_blob = data_blob_talloc(conn,
4446 iov[2].iov_base,
4447 security_length);
4448 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4449 return;
4450 }
4451
4452 tevent_req_done(req);
4453 }
4454
4455 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4456 TALLOC_CTX *tmp_mem,
4457 uint8_t *inbuf)
4458 {
4459 size_t num_pending = talloc_array_length(conn->pending);
4460 struct tevent_req *subreq;
4461 struct smbXcli_req_state *substate;
4462 struct tevent_req *req;
4463 uint32_t protocol_magic;
4464 size_t inbuf_len = smb_len_nbt(inbuf);
4465
4466 if (num_pending != 1) {
4467 return NT_STATUS_INTERNAL_ERROR;
4468 }
4469
4470 if (inbuf_len < 4) {
4471 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4472 }
4473
4474 subreq = conn->pending[0];
4475 substate = tevent_req_data(subreq, struct smbXcli_req_state);
4476 req = tevent_req_callback_data(subreq, struct tevent_req);
4477
4478 protocol_magic = IVAL(inbuf, 4);
4479
4480 switch (protocol_magic) {
4481 case SMB_MAGIC:
4482 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4483 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4484 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4485
4486 case SMB2_MAGIC:
4487 if (substate->smb2.recv_iov == NULL) {
4488 /*
4489 * For the SMB1 negprot we have move it.
4490 */
4491 substate->smb2.recv_iov = substate->smb1.recv_iov;
4492 substate->smb1.recv_iov = NULL;
4493 }
4494
4495 /*
4496 * we got an SMB2 answer, which consumed sequence number 0
4497 * so we need to use 1 as the next one.
4498 *
4499 * we also need to set the current credits to 0
4500 * as we consumed the initial one. The SMB2 answer
4501 * hopefully grant us a new credit.
4502 */
4503 conn->smb2.mid = 1;
4504 conn->smb2.cur_credits = 0;
4505 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4506 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4507 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4508 }
4509
4510 DEBUG(10, ("Got non-SMB PDU\n"));
4511 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4512 }
4513
4514 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
4515 {
4516 return tevent_req_simple_recv_ntstatus(req);
4517 }
4518
4519 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
4520 uint32_t timeout_msec,
4521 enum protocol_types min_protocol,
4522 enum protocol_types max_protocol)
4523 {
4524 TALLOC_CTX *frame = talloc_stackframe();
4525 struct tevent_context *ev;
4526 struct tevent_req *req;
4527 NTSTATUS status = NT_STATUS_NO_MEMORY;
4528 bool ok;
4529
4530 if (smbXcli_conn_has_async_calls(conn)) {
4531 /*
4532 * Can't use sync call while an async call is in flight
4533 */
4534 status = NT_STATUS_INVALID_PARAMETER_MIX;
4535 goto fail;
4536 }
4537 ev = samba_tevent_context_init(frame);
4538 if (ev == NULL) {
4539 goto fail;
4540 }
4541 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
4542 min_protocol, max_protocol);
4543 if (req == NULL) {
4544 goto fail;
4545 }
4546 ok = tevent_req_poll(req, ev);
4547 if (!ok) {
4548 status = map_nt_error_from_unix_common(errno);
4549 goto fail;
4550 }
4551 status = smbXcli_negprot_recv(req);
4552 fail:
4553 TALLOC_FREE(frame);
4554 return status;
4555 }
4556
4557 static int smbXcli_session_destructor(struct smbXcli_session *session)
4558 {
4559 if (session->conn == NULL) {
4560 return 0;
4561 }
4562
4563 DLIST_REMOVE(session->conn->sessions, session);
4564 return 0;
4565 }
4566
4567 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
4568 struct smbXcli_conn *conn)
4569 {
4570 struct smbXcli_session *session;
4571
4572 session = talloc_zero(mem_ctx, struct smbXcli_session);
4573 if (session == NULL) {
4574 return NULL;
4575 }
4576 session->smb2 = talloc_zero(session, struct smb2cli_session);
4577 if (session->smb2 == NULL) {
4578 talloc_free(session);
4579 return NULL;
4580 }
4581 talloc_set_destructor(session, smbXcli_session_destructor);
4582
4583 DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
4584 session->conn = conn;
4585
4586 return session;
4587 }
4588
4589 struct smbXcli_session *smbXcli_session_copy(TALLOC_CTX *mem_ctx,
4590 struct smbXcli_session *src)
4591 {
4592 struct smbXcli_session *session;
4593
4594 session = talloc_zero(mem_ctx, struct smbXcli_session);
4595 if (session == NULL) {
4596 return NULL;
4597 }
4598 session->smb2 = talloc_zero(session, struct smb2cli_session);
4599 if (session->smb2 == NULL) {
4600 talloc_free(session);
4601 return NULL;
4602 }
4603
4604 session->conn = src->conn;
4605 *session->smb2 = *src->smb2;
4606 session->smb2_channel = src->smb2_channel;
4607 session->disconnect_expired = src->disconnect_expired;
4608
4609 DLIST_ADD_END(src->conn->sessions, session, struct smbXcli_session *);
4610 talloc_set_destructor(session, smbXcli_session_destructor);
4611
4612 return session;
4613 }
4614
4615
4616 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
4617 TALLOC_CTX *mem_ctx,
4618 DATA_BLOB *key)
4619 {
4620 const DATA_BLOB *application_key;
4621
4622 *key = data_blob_null;
4623
4624 if (session->conn == NULL) {
4625 return NT_STATUS_NO_USER_SESSION_KEY;
4626 }
4627
4628 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
4629 application_key = &session->smb2->application_key;
4630 } else {
4631 application_key = &session->smb1.application_key;
4632 }
4633
4634 if (application_key->length == 0) {
4635 return NT_STATUS_NO_USER_SESSION_KEY;
4636 }
4637
4638 *key = data_blob_dup_talloc(mem_ctx, *application_key);
4639 if (key->data == NULL) {
4640 return NT_STATUS_NO_MEMORY;
4641 }
4642
4643 return NT_STATUS_OK;
4644 }
4645
4646 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
4647 {
4648 session->disconnect_expired = true;
4649 }
4650
4651 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
4652 {
4653 return session->smb1.session_id;
4654 }
4655
4656 void smb1cli_session_set_id(struct smbXcli_session *session,
4657 uint16_t session_id)
4658 {
4659 session->smb1.session_id = session_id;
4660 }
4661
4662 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
4663 const DATA_BLOB _session_key)
4664 {
4665 struct smbXcli_conn *conn = session->conn;
4666 uint8_t session_key[16];
4667
4668 if (conn == NULL) {
4669 return NT_STATUS_INVALID_PARAMETER_MIX;
4670 }
4671
4672 if (session->smb1.application_key.length != 0) {
4673 /*
4674 * TODO: do not allow this...
4675 *
4676 * return NT_STATUS_INVALID_PARAMETER_MIX;
4677 */
4678 data_blob_clear_free(&session->smb1.application_key);
4679 session->smb1.protected_key = false;
4680 }
4681
4682 if (_session_key.length == 0) {
4683 return NT_STATUS_OK;
4684 }
4685
4686 ZERO_STRUCT(session_key);
4687 memcpy(session_key, _session_key.data,
4688 MIN(_session_key.length, sizeof(session_key)));
4689
4690 session->smb1.application_key = data_blob_talloc(session,
4691 session_key,
4692 sizeof(session_key));
4693 ZERO_STRUCT(session_key);
4694 if (session->smb1.application_key.data == NULL) {
4695 return NT_STATUS_NO_MEMORY;
4696 }
4697
4698 session->smb1.protected_key = false;
4699
4700 return NT_STATUS_OK;
4701 }
4702
4703 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
4704 {
4705 if (session->smb1.protected_key) {
4706 /* already protected */
4707 return NT_STATUS_OK;
4708 }
4709
4710 if (session->smb1.application_key.length != 16) {
4711 return NT_STATUS_INVALID_PARAMETER_MIX;
4712 }
4713
4714 smb_key_derivation(session->smb1.application_key.data,
4715 session->smb1.application_key.length,
4716 session->smb1.application_key.data);
4717
4718 session->smb1.protected_key = true;
4719
4720 return NT_STATUS_OK;
4721 }
4722
4723 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
4724 {
4725 struct smbXcli_conn *conn = session->conn;
4726 uint8_t security_mode = 0;
4727
4728 if (conn == NULL) {
4729 return security_mode;
4730 }
4731
4732 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
4733 if (conn->mandatory_signing) {
4734 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
4735 }
4736
4737 return security_mode;
4738 }
4739
4740 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
4741 {
4742 return session->smb2->session_id;
4743 }
4744
4745 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
4746 {
4747 return session->smb2->session_flags;
4748 }
4749
4750 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
4751 uint64_t session_id,
4752 uint16_t session_flags)
4753 {
4754 session->smb2->session_id = session_id;
4755 session->smb2->session_flags = session_flags;
4756 }
4757
4758 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
4759 {
4760 session->smb2->channel_sequence += 1;
4761 }
4762
4763 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
4764 const DATA_BLOB _session_key,
4765 const struct iovec *recv_iov)
4766 {
4767 struct smbXcli_conn *conn = session->conn;
4768 uint16_t no_sign_flags;
4769 uint8_t session_key[16];
4770 bool check_signature = true;
4771 uint32_t hdr_flags;
4772 NTSTATUS status;
4773
4774 if (conn == NULL) {
4775 return NT_STATUS_INVALID_PARAMETER_MIX;
4776 }
4777
4778 if (recv_iov[0].iov_len != SMB2_HDR_BODY) {
4779 return NT_STATUS_INVALID_PARAMETER_MIX;
4780 }
4781
4782 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
4783
4784 if (session->smb2->session_flags & no_sign_flags) {
4785 session->smb2->should_sign = false;
4786 return NT_STATUS_OK;
4787 }
4788
4789 if (session->smb2->signing_key.length != 0) {
4790 return NT_STATUS_INVALID_PARAMETER_MIX;
4791 }
4792
4793 ZERO_STRUCT(session_key);
4794 memcpy(session_key, _session_key.data,
4795 MIN(_session_key.length, sizeof(session_key)));
4796
4797 session->smb2->signing_key = data_blob_talloc(session,
4798 session_key,
4799 sizeof(session_key));
4800 if (session->smb2->signing_key.data == NULL) {
4801 ZERO_STRUCT(session_key);
4802 return NT_STATUS_NO_MEMORY;
4803 }
4804
4805 if (conn->protocol >= PROTOCOL_SMB2_24) {
4806 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4807 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4808
4809 smb2_key_derivation(session_key, sizeof(session_key),
4810 label.data, label.length,
4811 context.data, context.length,
4812 session->smb2->signing_key.data);
4813 }
4814
4815 session->smb2->encryption_key = data_blob_dup_talloc(session,
4816 session->smb2->signing_key);
4817 if (session->smb2->encryption_key.data == NULL) {
4818 ZERO_STRUCT(session_key);
4819 return NT_STATUS_NO_MEMORY;
4820 }
4821
4822 if (conn->protocol >= PROTOCOL_SMB2_24) {
4823 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4824 const DATA_BLOB context = data_blob_string_const_null("ServerIn ");
4825
4826 smb2_key_derivation(session_key, sizeof(session_key),
4827 label.data, label.length,
4828 context.data, context.length,
4829 session->smb2->encryption_key.data);
4830 }
4831
4832 session->smb2->decryption_key = data_blob_dup_talloc(session,
4833 session->smb2->signing_key);
4834 if (session->smb2->decryption_key.data == NULL) {
4835 ZERO_STRUCT(session_key);
4836 return NT_STATUS_NO_MEMORY;
4837 }
4838
4839 if (conn->protocol >= PROTOCOL_SMB2_24) {
4840 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4841 const DATA_BLOB context = data_blob_string_const_null("ServerOut");
4842
4843 smb2_key_derivation(session_key, sizeof(session_key),
4844 label.data, label.length,
4845 context.data, context.length,
4846 session->smb2->decryption_key.data);
4847 }
4848
4849 session->smb2->application_key = data_blob_dup_talloc(session,
4850 session->smb2->signing_key);
4851 if (session->smb2->application_key.data == NULL) {
4852 ZERO_STRUCT(session_key);
4853 return NT_STATUS_NO_MEMORY;
4854 }
4855
4856 if (conn->protocol >= PROTOCOL_SMB2_24) {
4857 const DATA_BLOB label = data_blob_string_const_null("SMB2APP");
4858 const DATA_BLOB context = data_blob_string_const_null("SmbRpc");
4859
4860 smb2_key_derivation(session_key, sizeof(session_key),
4861 label.data, label.length,
4862 context.data, context.length,
4863 session->smb2->application_key.data);
4864 }
4865 ZERO_STRUCT(session_key);
4866
4867 session->smb2_channel.signing_key = data_blob_dup_talloc(session,
4868 session->smb2->signing_key);
4869 if (session->smb2_channel.signing_key.data == NULL) {
4870 return NT_STATUS_NO_MEMORY;
4871 }
4872
4873 check_signature = conn->mandatory_signing;
4874
4875 hdr_flags = IVAL(recv_iov[0].iov_base, SMB2_HDR_FLAGS);
4876 if (hdr_flags & SMB2_HDR_FLAG_SIGNED) {
4877 /*
4878 * Sadly some vendors don't sign the
4879 * final SMB2 session setup response
4880 *
4881 * At least Windows and Samba are always doing this
4882 * if there's a session key available.
4883 *
4884 * We only check the signature if it's mandatory
4885 * or SMB2_HDR_FLAG_SIGNED is provided.
4886 */
4887 check_signature = true;
4888 }
4889
4890 if (check_signature) {
4891 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4892 session->conn->protocol,
4893 recv_iov, 3);
4894 if (!NT_STATUS_IS_OK(status)) {
4895 return status;
4896 }
4897 }
4898
4899 session->smb2->should_sign = false;
4900 session->smb2->should_encrypt = false;
4901
4902 if (conn->desire_signing) {
4903 session->smb2->should_sign = true;
4904 }
4905
4906 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
4907 session->smb2->should_sign = true;
4908 }
4909
4910 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
4911 session->smb2->should_encrypt = true;
4912 }
4913
4914 if (conn->protocol < PROTOCOL_SMB2_24) {
4915 session->smb2->should_encrypt = false;
4916 }
4917
4918 if (!(conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
4919 session->smb2->should_encrypt = false;
4920 }
4921
4922 generate_random_buffer((uint8_t *)&session->smb2->nonce_high,
4923 sizeof(session->smb2->nonce_high));
4924 session->smb2->nonce_low = 1;
4925
4926 return NT_STATUS_OK;
4927 }
4928
4929 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
4930 struct smbXcli_session *session1,
4931 struct smbXcli_conn *conn,
4932 struct smbXcli_session **_session2)
4933 {
4934 struct smbXcli_session *session2;
4935
4936 if (session1->smb2->signing_key.length == 0) {
4937 return NT_STATUS_INVALID_PARAMETER_MIX;
4938 }
4939
4940 if (conn == NULL) {
4941 return NT_STATUS_INVALID_PARAMETER_MIX;
4942 }
4943
4944 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
4945 if (session2 == NULL) {
4946 return NT_STATUS_NO_MEMORY;
4947 }
4948 session2->smb2 = talloc_reference(session2, session1->smb2);
4949 if (session2->smb2 == NULL) {
4950 talloc_free(session2);
4951 return NT_STATUS_NO_MEMORY;
4952 }
4953
4954 talloc_set_destructor(session2, smbXcli_session_destructor);
4955 DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
4956 session2->conn = conn;
4957
4958 *_session2 = session2;
4959 return NT_STATUS_OK;
4960 }
4961
4962 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
4963 const DATA_BLOB _channel_key,
4964 const struct iovec *recv_iov)
4965 {
4966 struct smbXcli_conn *conn = session->conn;
4967 uint8_t channel_key[16];
4968 NTSTATUS status;
4969
4970 if (conn == NULL) {
4971 return NT_STATUS_INVALID_PARAMETER_MIX;
4972 }
4973
4974 if (session->smb2_channel.signing_key.length != 0) {
4975 return NT_STATUS_INVALID_PARAMETER_MIX;
4976 }
4977
4978 ZERO_STRUCT(channel_key);
4979 memcpy(channel_key, _channel_key.data,
4980 MIN(_channel_key.length, sizeof(channel_key)));
4981
4982 session->smb2_channel.signing_key = data_blob_talloc(session,
4983 channel_key,
4984 sizeof(channel_key));
4985 if (session->smb2_channel.signing_key.data == NULL) {
4986 ZERO_STRUCT(channel_key);
4987 return NT_STATUS_NO_MEMORY;
4988 }
4989
4990 if (conn->protocol >= PROTOCOL_SMB2_24) {
4991 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4992 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4993
4994 smb2_key_derivation(channel_key, sizeof(channel_key),
4995 label.data, label.length,
4996 context.data, context.length,
4997 session->smb2_channel.signing_key.data);
4998 }
4999 ZERO_STRUCT(channel_key);
5000
5001 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
5002 session->conn->protocol,
5003 recv_iov, 3);
5004 if (!NT_STATUS_IS_OK(status)) {
5005 return status;
5006 }
5007
5008 return NT_STATUS_OK;
5009 }
5010
5011 NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
5012 {
5013 if (session->smb2->should_encrypt) {
5014 return NT_STATUS_OK;
5015 }
5016
5017 if (session->conn->protocol < PROTOCOL_SMB2_24) {
5018 return NT_STATUS_NOT_SUPPORTED;
5019 }
5020
5021 if (!(session->conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
5022 return NT_STATUS_NOT_SUPPORTED;
5023 }
5024
5025 if (session->smb2->signing_key.data == NULL) {
5026 return NT_STATUS_NOT_SUPPORTED;
5027 }
5028 session->smb2->should_encrypt = true;
5029 return NT_STATUS_OK;
5030 }
5031
5032 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
5033 {
5034 struct smbXcli_tcon *tcon;
5035
5036 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
5037 if (tcon == NULL) {
5038 return NULL;
5039 }
5040
5041 return tcon;
5042 }
5043
5044 void smbXcli_tcon_set_fs_attributes(struct smbXcli_tcon *tcon,
5045 uint32_t fs_attributes)
5046 {
5047 tcon->fs_attributes = fs_attributes;
5048 }
5049
5050 uint32_t smbXcli_tcon_get_fs_attributes(struct smbXcli_tcon *tcon)
5051 {
5052 return tcon->fs_attributes;
5053 }
5054
5055 bool smbXcli_tcon_is_dfs_share(struct smbXcli_tcon *tcon)
5056 {
5057 if (tcon == NULL) {
5058 return false;
5059 }
5060
5061 if (tcon->is_smb1) {
5062 if (tcon->smb1.optional_support & SMB_SHARE_IN_DFS) {
5063 return true;
5064 }
5065
5066 return false;
5067 }
5068
5069 if (tcon->smb2.capabilities & SMB2_SHARE_CAP_DFS) {
5070 return true;
5071 }
5072
5073 return false;
5074 }
5075
5076 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
5077 {
5078 return tcon->smb1.tcon_id;
5079 }
5080
5081 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
5082 {
5083 tcon->is_smb1 = true;
5084 tcon->smb1.tcon_id = tcon_id;
5085 }
5086
5087 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
5088 uint16_t tcon_id,
5089 uint16_t optional_support,
5090 uint32_t maximal_access,
5091 uint32_t guest_maximal_access,
5092 const char *service,
5093 const char *fs_type)
5094 {
5095 tcon->is_smb1 = true;
5096 tcon->fs_attributes = 0;
5097 tcon->smb1.tcon_id = tcon_id;
5098 tcon->smb1.optional_support = optional_support;
5099 tcon->smb1.maximal_access = maximal_access;
5100 tcon->smb1.guest_maximal_access = guest_maximal_access;
5101
5102 TALLOC_FREE(tcon->smb1.service);
5103 tcon->smb1.service = talloc_strdup(tcon, service);
5104 if (service != NULL && tcon->smb1.service == NULL) {
5105 return false;
5106 }
5107
5108 TALLOC_FREE(tcon->smb1.fs_type);
5109 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
5110 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
5111 return false;
5112 }
5113
5114 return true;
5115 }
5116
5117 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
5118 {
5119 return tcon->smb2.tcon_id;
5120 }
5121
5122 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
5123 {
5124 return tcon->smb2.capabilities;
5125 }
5126
5127 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
5128 struct smbXcli_session *session,
5129 uint32_t tcon_id,
5130 uint8_t type,
5131 uint32_t flags,
5132 uint32_t capabilities,
5133 uint32_t maximal_access)
5134 {
5135 tcon->is_smb1 = false;
5136 tcon->fs_attributes = 0;
5137 tcon->smb2.tcon_id = tcon_id;
5138 tcon->smb2.type = type;
5139 tcon->smb2.flags = flags;
5140 tcon->smb2.capabilities = capabilities;
5141 tcon->smb2.maximal_access = maximal_access;
5142
5143 tcon->smb2.should_encrypt = false;
5144
5145 if (session == NULL) {
5146 return;
5147 }
5148
5149 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
5150
5151 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
5152 tcon->smb2.should_encrypt = true;
5153 }
5154 }
5155
5156 bool smb2cli_tcon_is_encryption_on(struct smbXcli_tcon *tcon)
5157 {
5158 return tcon->smb2.should_encrypt;
5159 }
Samba GIT mirror