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libcli/smb: let smb1cli_session_set_id() reset the application_key
[Samba/gebeck_regimport.git] / libcli / smb / smbXcli_base.c
blob1b3a688a9e0d227afe0deaf1eaa9a1548b91b017
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 } smb1;
153
154 struct smb2cli_session *smb2;
155
156 struct {
157 DATA_BLOB signing_key;
158 } smb2_channel;
159 };
160
161 struct smbXcli_tcon {
162 struct {
163 uint16_t tcon_id;
164 uint16_t optional_support;
165 uint32_t maximal_access;
166 uint32_t guest_maximal_access;
167 char *service;
168 char *fs_type;
169 } smb1;
170
171 struct {
172 uint32_t tcon_id;
173 uint8_t type;
174 uint32_t flags;
175 uint32_t capabilities;
176 uint32_t maximal_access;
177 bool should_encrypt;
178 } smb2;
179 };
180
181 struct smbXcli_req_state {
182 struct tevent_context *ev;
183 struct smbXcli_conn *conn;
184 struct smbXcli_session *session; /* maybe NULL */
185 struct smbXcli_tcon *tcon; /* maybe NULL */
186
187 uint8_t length_hdr[4];
188
189 bool one_way;
190
191 uint8_t *inbuf;
192
193 struct {
194 /* Space for the header including the wct */
195 uint8_t hdr[HDR_VWV];
196
197 /*
198 * For normal requests, smb1cli_req_send chooses a mid.
199 * SecondaryV trans requests need to use the mid of the primary
200 * request, so we need a place to store it.
201 * Assume it is set if != 0.
202 */
203 uint16_t mid;
204
205 uint16_t *vwv;
206 uint8_t bytecount_buf[2];
207
208 #define MAX_SMB_IOV 10
209 /* length_hdr, hdr, words, byte_count, buffers */
210 struct iovec iov[1 + 3 + MAX_SMB_IOV];
211 int iov_count;
212
213 bool one_way_seqnum;
214 uint32_t seqnum;
215 struct tevent_req **chained_requests;
216
217 uint8_t recv_cmd;
218 NTSTATUS recv_status;
219 /* always an array of 3 talloc elements */
220 struct iovec *recv_iov;
221 } smb1;
222
223 struct {
224 const uint8_t *fixed;
225 uint16_t fixed_len;
226 const uint8_t *dyn;
227 uint32_t dyn_len;
228
229 uint8_t transform[SMB2_TF_HDR_SIZE];
230 uint8_t hdr[SMB2_HDR_BODY];
231 uint8_t pad[7]; /* padding space for compounding */
232
233 /*
234 * always an array of 3 talloc elements
235 * (without a SMB2_TRANSFORM header!)
236 *
237 * HDR, BODY, DYN
238 */
239 struct iovec *recv_iov;
240
241 uint16_t credit_charge;
242
243 bool should_sign;
244 bool should_encrypt;
245
246 bool signing_skipped;
247 bool notify_async;
248 bool got_async;
249 } smb2;
250 };
251
252 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
253 {
254 /*
255 * NT_STATUS_OK, means we do not notify the callers
256 */
257 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
258
259 while (conn->sessions) {
260 conn->sessions->conn = NULL;
261 DLIST_REMOVE(conn->sessions, conn->sessions);
262 }
263
264 if (conn->smb1.trans_enc) {
265 TALLOC_FREE(conn->smb1.trans_enc);
266 }
267
268 return 0;
269 }
270
271 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
272 int fd,
273 const char *remote_name,
274 enum smb_signing_setting signing_state,
275 uint32_t smb1_capabilities,
276 struct GUID *client_guid,
277 uint32_t smb2_capabilities)
278 {
279 struct smbXcli_conn *conn = NULL;
280 void *ss = NULL;
281 struct sockaddr *sa = NULL;
282 socklen_t sa_length;
283 int ret;
284
285 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
286 if (!conn) {
287 return NULL;
288 }
289
290 conn->read_fd = fd;
291 conn->write_fd = dup(fd);
292 if (conn->write_fd == -1) {
293 goto error;
294 }
295
296 conn->remote_name = talloc_strdup(conn, remote_name);
297 if (conn->remote_name == NULL) {
298 goto error;
299 }
300
301
302 ss = (void *)&conn->local_ss;
303 sa = (struct sockaddr *)ss;
304 sa_length = sizeof(conn->local_ss);
305 ret = getsockname(fd, sa, &sa_length);
306 if (ret == -1) {
307 goto error;
308 }
309 ss = (void *)&conn->remote_ss;
310 sa = (struct sockaddr *)ss;
311 sa_length = sizeof(conn->remote_ss);
312 ret = getpeername(fd, sa, &sa_length);
313 if (ret == -1) {
314 goto error;
315 }
316
317 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
318 if (conn->outgoing == NULL) {
319 goto error;
320 }
321 conn->pending = NULL;
322
323 conn->protocol = PROTOCOL_NONE;
324
325 switch (signing_state) {
326 case SMB_SIGNING_OFF:
327 /* never */
328 conn->allow_signing = false;
329 conn->desire_signing = false;
330 conn->mandatory_signing = false;
331 break;
332 case SMB_SIGNING_DEFAULT:
333 case SMB_SIGNING_IF_REQUIRED:
334 /* if the server requires it */
335 conn->allow_signing = true;
336 conn->desire_signing = false;
337 conn->mandatory_signing = false;
338 break;
339 case SMB_SIGNING_REQUIRED:
340 /* always */
341 conn->allow_signing = true;
342 conn->desire_signing = true;
343 conn->mandatory_signing = true;
344 break;
345 }
346
347 conn->smb1.client.capabilities = smb1_capabilities;
348 conn->smb1.client.max_xmit = UINT16_MAX;
349
350 conn->smb1.capabilities = conn->smb1.client.capabilities;
351 conn->smb1.max_xmit = 1024;
352
353 conn->smb1.mid = 1;
354
355 /* initialise signing */
356 conn->smb1.signing = smb_signing_init(conn,
357 conn->allow_signing,
358 conn->desire_signing,
359 conn->mandatory_signing);
360 if (!conn->smb1.signing) {
361 goto error;
362 }
363
364 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
365 if (conn->mandatory_signing) {
366 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
367 }
368 if (client_guid) {
369 conn->smb2.client.guid = *client_guid;
370 }
371 conn->smb2.client.capabilities = smb2_capabilities;
372
373 conn->smb2.cur_credits = 1;
374 conn->smb2.max_credits = 0;
375
376 talloc_set_destructor(conn, smbXcli_conn_destructor);
377 return conn;
378
379 error:
380 if (conn->write_fd != -1) {
381 close(conn->write_fd);
382 }
383 TALLOC_FREE(conn);
384 return NULL;
385 }
386
387 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
388 {
389 if (conn == NULL) {
390 return false;
391 }
392
393 if (conn->read_fd == -1) {
394 return false;
395 }
396
397 return true;
398 }
399
400 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
401 {
402 return conn->protocol;
403 }
404
405 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
406 {
407 if (conn->protocol >= PROTOCOL_SMB2_02) {
408 return true;
409 }
410
411 if (conn->smb1.capabilities & CAP_UNICODE) {
412 return true;
413 }
414
415 return false;
416 }
417
418 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
419 {
420 set_socket_options(conn->read_fd, options);
421 }
422
423 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
424 {
425 return &conn->local_ss;
426 }
427
428 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
429 {
430 return &conn->remote_ss;
431 }
432
433 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
434 {
435 return conn->remote_name;
436 }
437
438 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
439 {
440 if (conn->protocol >= PROTOCOL_SMB2_02) {
441 /*
442 * TODO...
443 */
444 return 1;
445 }
446
447 return conn->smb1.server.max_mux;
448 }
449
450 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
451 {
452 if (conn->protocol >= PROTOCOL_SMB2_02) {
453 return conn->smb2.server.system_time;
454 }
455
456 return conn->smb1.server.system_time;
457 }
458
459 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
460 {
461 if (conn->protocol >= PROTOCOL_SMB2_02) {
462 return &conn->smb2.server.gss_blob;
463 }
464
465 return &conn->smb1.server.gss_blob;
466 }
467
468 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
469 {
470 if (conn->protocol >= PROTOCOL_SMB2_02) {
471 return &conn->smb2.server.guid;
472 }
473
474 return &conn->smb1.server.guid;
475 }
476
477 struct smbXcli_conn_samba_suicide_state {
478 struct smbXcli_conn *conn;
479 struct iovec iov;
480 uint8_t buf[9];
481 };
482
483 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
484
485 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
486 struct tevent_context *ev,
487 struct smbXcli_conn *conn,
488 uint8_t exitcode)
489 {
490 struct tevent_req *req, *subreq;
491 struct smbXcli_conn_samba_suicide_state *state;
492
493 req = tevent_req_create(mem_ctx, &state,
494 struct smbXcli_conn_samba_suicide_state);
495 if (req == NULL) {
496 return NULL;
497 }
498 state->conn = conn;
499 SIVAL(state->buf, 4, 0x74697865);
500 SCVAL(state->buf, 8, exitcode);
501 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
502
503 state->iov.iov_base = state->buf;
504 state->iov.iov_len = sizeof(state->buf);
505
506 subreq = writev_send(state, ev, conn->outgoing, conn->write_fd,
507 false, &state->iov, 1);
508 if (tevent_req_nomem(subreq, req)) {
509 return tevent_req_post(req, ev);
510 }
511 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
512 return req;
513 }
514
515 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
516 {
517 struct tevent_req *req = tevent_req_callback_data(
518 subreq, struct tevent_req);
519 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
520 req, struct smbXcli_conn_samba_suicide_state);
521 ssize_t nwritten;
522 int err;
523
524 nwritten = writev_recv(subreq, &err);
525 TALLOC_FREE(subreq);
526 if (nwritten == -1) {
527 NTSTATUS status = map_nt_error_from_unix_common(err);
528 smbXcli_conn_disconnect(state->conn, status);
529 return;
530 }
531 tevent_req_done(req);
532 }
533
534 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
535 {
536 return tevent_req_simple_recv_ntstatus(req);
537 }
538
539 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
540 uint8_t exitcode)
541 {
542 TALLOC_CTX *frame = talloc_stackframe();
543 struct tevent_context *ev;
544 struct tevent_req *req;
545 NTSTATUS status = NT_STATUS_NO_MEMORY;
546 bool ok;
547
548 if (smbXcli_conn_has_async_calls(conn)) {
549 /*
550 * Can't use sync call while an async call is in flight
551 */
552 status = NT_STATUS_INVALID_PARAMETER_MIX;
553 goto fail;
554 }
555 ev = tevent_context_init(frame);
556 if (ev == NULL) {
557 goto fail;
558 }
559 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
560 if (req == NULL) {
561 goto fail;
562 }
563 ok = tevent_req_poll(req, ev);
564 if (!ok) {
565 status = map_nt_error_from_unix_common(errno);
566 goto fail;
567 }
568 status = smbXcli_conn_samba_suicide_recv(req);
569 fail:
570 TALLOC_FREE(frame);
571 return status;
572 }
573
574 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
575 {
576 return conn->smb1.capabilities;
577 }
578
579 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
580 {
581 return conn->smb1.max_xmit;
582 }
583
584 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
585 {
586 return conn->smb1.server.session_key;
587 }
588
589 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
590 {
591 return conn->smb1.server.challenge;
592 }
593
594 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
595 {
596 return conn->smb1.server.security_mode;
597 }
598
599 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
600 {
601 return conn->smb1.server.readbraw;
602 }
603
604 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
605 {
606 return conn->smb1.server.writebraw;
607 }
608
609 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
610 {
611 return conn->smb1.server.lockread;
612 }
613
614 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
615 {
616 return conn->smb1.server.writeunlock;
617 }
618
619 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
620 {
621 return conn->smb1.server.time_zone;
622 }
623
624 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
625 const DATA_BLOB user_session_key,
626 const DATA_BLOB response)
627 {
628 return smb_signing_activate(conn->smb1.signing,
629 user_session_key,
630 response);
631 }
632
633 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
634 const uint8_t *buf, uint32_t seqnum)
635 {
636 return smb_signing_check_pdu(conn->smb1.signing, buf, seqnum);
637 }
638
639 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
640 {
641 return smb_signing_is_active(conn->smb1.signing);
642 }
643
644 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
645 struct smb_trans_enc_state *es)
646 {
647 /* Replace the old state, if any. */
648 if (conn->smb1.trans_enc) {
649 TALLOC_FREE(conn->smb1.trans_enc);
650 }
651 conn->smb1.trans_enc = es;
652 }
653
654 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
655 {
656 return common_encryption_on(conn->smb1.trans_enc);
657 }
658
659
660 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
661 {
662 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
663 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
664
665 if (NT_STATUS_IS_OK(status)) {
666 return NT_STATUS_OK;
667 }
668
669 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
670 return status;
671 }
672
673 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
674 }
675
676 /**
677 * Is the SMB command able to hold an AND_X successor
678 * @param[in] cmd The SMB command in question
679 * @retval Can we add a chained request after "cmd"?
680 */
681 bool smb1cli_is_andx_req(uint8_t cmd)
682 {
683 switch (cmd) {
684 case SMBtconX:
685 case SMBlockingX:
686 case SMBopenX:
687 case SMBreadX:
688 case SMBwriteX:
689 case SMBsesssetupX:
690 case SMBulogoffX:
691 case SMBntcreateX:
692 return true;
693 break;
694 default:
695 break;
696 }
697
698 return false;
699 }
700
701 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
702 {
703 size_t num_pending = talloc_array_length(conn->pending);
704 uint16_t result;
705
706 while (true) {
707 size_t i;
708
709 result = conn->smb1.mid++;
710 if ((result == 0) || (result == 0xffff)) {
711 continue;
712 }
713
714 for (i=0; i<num_pending; i++) {
715 if (result == smb1cli_req_mid(conn->pending[i])) {
716 break;
717 }
718 }
719
720 if (i == num_pending) {
721 return result;
722 }
723 }
724 }
725
726 void smbXcli_req_unset_pending(struct tevent_req *req)
727 {
728 struct smbXcli_req_state *state =
729 tevent_req_data(req,
730 struct smbXcli_req_state);
731 struct smbXcli_conn *conn = state->conn;
732 size_t num_pending = talloc_array_length(conn->pending);
733 size_t i;
734
735 if (state->smb1.mid != 0) {
736 /*
737 * This is a [nt]trans[2] request which waits
738 * for more than one reply.
739 */
740 return;
741 }
742
743 talloc_set_destructor(req, NULL);
744
745 if (num_pending == 1) {
746 /*
747 * The pending read_smb tevent_req is a child of
748 * conn->pending. So if nothing is pending anymore, we need to
749 * delete the socket read fde.
750 */
751 TALLOC_FREE(conn->pending);
752 conn->read_smb_req = NULL;
753 return;
754 }
755
756 for (i=0; i<num_pending; i++) {
757 if (req == conn->pending[i]) {
758 break;
759 }
760 }
761 if (i == num_pending) {
762 /*
763 * Something's seriously broken. Just returning here is the
764 * right thing nevertheless, the point of this routine is to
765 * remove ourselves from conn->pending.
766 */
767 return;
768 }
769
770 /*
771 * Remove ourselves from the conn->pending array
772 */
773 for (; i < (num_pending - 1); i++) {
774 conn->pending[i] = conn->pending[i+1];
775 }
776
777 /*
778 * No NULL check here, we're shrinking by sizeof(void *), and
779 * talloc_realloc just adjusts the size for this.
780 */
781 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
782 num_pending - 1);
783 return;
784 }
785
786 static int smbXcli_req_destructor(struct tevent_req *req)
787 {
788 struct smbXcli_req_state *state =
789 tevent_req_data(req,
790 struct smbXcli_req_state);
791
792 /*
793 * Make sure we really remove it from
794 * the pending array on destruction.
795 */
796 state->smb1.mid = 0;
797 smbXcli_req_unset_pending(req);
798 return 0;
799 }
800
801 static bool smb1cli_req_cancel(struct tevent_req *req);
802 static bool smb2cli_req_cancel(struct tevent_req *req);
803
804 static bool smbXcli_req_cancel(struct tevent_req *req)
805 {
806 struct smbXcli_req_state *state =
807 tevent_req_data(req,
808 struct smbXcli_req_state);
809
810 if (!smbXcli_conn_is_connected(state->conn)) {
811 return false;
812 }
813
814 if (state->conn->protocol == PROTOCOL_NONE) {
815 return false;
816 }
817
818 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
819 return smb2cli_req_cancel(req);
820 }
821
822 return smb1cli_req_cancel(req);
823 }
824
825 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
826
827 bool smbXcli_req_set_pending(struct tevent_req *req)
828 {
829 struct smbXcli_req_state *state =
830 tevent_req_data(req,
831 struct smbXcli_req_state);
832 struct smbXcli_conn *conn;
833 struct tevent_req **pending;
834 size_t num_pending;
835
836 conn = state->conn;
837
838 if (!smbXcli_conn_is_connected(conn)) {
839 return false;
840 }
841
842 num_pending = talloc_array_length(conn->pending);
843
844 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
845 num_pending+1);
846 if (pending == NULL) {
847 return false;
848 }
849 pending[num_pending] = req;
850 conn->pending = pending;
851 talloc_set_destructor(req, smbXcli_req_destructor);
852 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
853
854 if (!smbXcli_conn_receive_next(conn)) {
855 /*
856 * the caller should notify the current request
857 *
858 * And all other pending requests get notified
859 * by smbXcli_conn_disconnect().
860 */
861 smbXcli_req_unset_pending(req);
862 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
863 return false;
864 }
865
866 return true;
867 }
868
869 static void smbXcli_conn_received(struct tevent_req *subreq);
870
871 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
872 {
873 size_t num_pending = talloc_array_length(conn->pending);
874 struct tevent_req *req;
875 struct smbXcli_req_state *state;
876
877 if (conn->read_smb_req != NULL) {
878 return true;
879 }
880
881 if (num_pending == 0) {
882 if (conn->smb2.mid < UINT64_MAX) {
883 /* no more pending requests, so we are done for now */
884 return true;
885 }
886
887 /*
888 * If there are no more SMB2 requests possible,
889 * because we are out of message ids,
890 * we need to disconnect.
891 */
892 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
893 return true;
894 }
895
896 req = conn->pending[0];
897 state = tevent_req_data(req, struct smbXcli_req_state);
898
899 /*
900 * We're the first ones, add the read_smb request that waits for the
901 * answer from the server
902 */
903 conn->read_smb_req = read_smb_send(conn->pending,
904 state->ev,
905 conn->read_fd);
906 if (conn->read_smb_req == NULL) {
907 return false;
908 }
909 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
910 return true;
911 }
912
913 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
914 {
915 struct smbXcli_session *session;
916
917 tevent_queue_stop(conn->outgoing);
918
919 if (conn->read_fd != -1) {
920 close(conn->read_fd);
921 }
922 if (conn->write_fd != -1) {
923 close(conn->write_fd);
924 }
925 conn->read_fd = -1;
926 conn->write_fd = -1;
927
928 session = conn->sessions;
929 if (talloc_array_length(conn->pending) == 0) {
930 /*
931 * if we do not have pending requests
932 * there is no need to update the channel_sequence
933 */
934 session = NULL;
935 }
936 for (; session; session = session->next) {
937 smb2cli_session_increment_channel_sequence(session);
938 }
939
940 /*
941 * Cancel all pending requests. We do not do a for-loop walking
942 * conn->pending because that array changes in
943 * smbXcli_req_unset_pending.
944 */
945 while (talloc_array_length(conn->pending) > 0) {
946 struct tevent_req *req;
947 struct smbXcli_req_state *state;
948 struct tevent_req **chain;
949 size_t num_chained;
950 size_t i;
951
952 req = conn->pending[0];
953 state = tevent_req_data(req, struct smbXcli_req_state);
954
955 if (state->smb1.chained_requests == NULL) {
956 /*
957 * We're dead. No point waiting for trans2
958 * replies.
959 */
960 state->smb1.mid = 0;
961
962 smbXcli_req_unset_pending(req);
963
964 if (NT_STATUS_IS_OK(status)) {
965 /* do not notify the callers */
966 continue;
967 }
968
969 /*
970 * we need to defer the callback, because we may notify
971 * more then one caller.
972 */
973 tevent_req_defer_callback(req, state->ev);
974 tevent_req_nterror(req, status);
975 continue;
976 }
977
978 chain = talloc_move(conn, &state->smb1.chained_requests);
979 num_chained = talloc_array_length(chain);
980
981 for (i=0; i<num_chained; i++) {
982 req = chain[i];
983 state = tevent_req_data(req, struct smbXcli_req_state);
984
985 /*
986 * We're dead. No point waiting for trans2
987 * replies.
988 */
989 state->smb1.mid = 0;
990
991 smbXcli_req_unset_pending(req);
992
993 if (NT_STATUS_IS_OK(status)) {
994 /* do not notify the callers */
995 continue;
996 }
997
998 /*
999 * we need to defer the callback, because we may notify
1000 * more than one caller.
1001 */
1002 tevent_req_defer_callback(req, state->ev);
1003 tevent_req_nterror(req, status);
1004 }
1005 TALLOC_FREE(chain);
1006 }
1007 }
1008
1009 /*
1010 * Fetch a smb request's mid. Only valid after the request has been sent by
1011 * smb1cli_req_send().
1012 */
1013 uint16_t smb1cli_req_mid(struct tevent_req *req)
1014 {
1015 struct smbXcli_req_state *state =
1016 tevent_req_data(req,
1017 struct smbXcli_req_state);
1018
1019 if (state->smb1.mid != 0) {
1020 return state->smb1.mid;
1021 }
1022
1023 return SVAL(state->smb1.hdr, HDR_MID);
1024 }
1025
1026 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1027 {
1028 struct smbXcli_req_state *state =
1029 tevent_req_data(req,
1030 struct smbXcli_req_state);
1031
1032 state->smb1.mid = mid;
1033 }
1034
1035 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1036 {
1037 struct smbXcli_req_state *state =
1038 tevent_req_data(req,
1039 struct smbXcli_req_state);
1040
1041 return state->smb1.seqnum;
1042 }
1043
1044 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1045 {
1046 struct smbXcli_req_state *state =
1047 tevent_req_data(req,
1048 struct smbXcli_req_state);
1049
1050 state->smb1.seqnum = seqnum;
1051 }
1052
1053 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1054 {
1055 size_t result = 0;
1056 int i;
1057 for (i=0; i<count; i++) {
1058 result += iov[i].iov_len;
1059 }
1060 return result;
1061 }
1062
1063 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1064 const struct iovec *iov,
1065 int count)
1066 {
1067 size_t len = smbXcli_iov_len(iov, count);
1068 size_t copied;
1069 uint8_t *buf;
1070 int i;
1071
1072 buf = talloc_array(mem_ctx, uint8_t, len);
1073 if (buf == NULL) {
1074 return NULL;
1075 }
1076 copied = 0;
1077 for (i=0; i<count; i++) {
1078 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
1079 copied += iov[i].iov_len;
1080 }
1081 return buf;
1082 }
1083
1084 static void smb1cli_req_flags(enum protocol_types protocol,
1085 uint32_t smb1_capabilities,
1086 uint8_t smb_command,
1087 uint8_t additional_flags,
1088 uint8_t clear_flags,
1089 uint8_t *_flags,
1090 uint16_t additional_flags2,
1091 uint16_t clear_flags2,
1092 uint16_t *_flags2)
1093 {
1094 uint8_t flags = 0;
1095 uint16_t flags2 = 0;
1096
1097 if (protocol >= PROTOCOL_LANMAN1) {
1098 flags |= FLAG_CASELESS_PATHNAMES;
1099 flags |= FLAG_CANONICAL_PATHNAMES;
1100 }
1101
1102 if (protocol >= PROTOCOL_LANMAN2) {
1103 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1104 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1105 }
1106
1107 if (protocol >= PROTOCOL_NT1) {
1108 flags2 |= FLAGS2_IS_LONG_NAME;
1109
1110 if (smb1_capabilities & CAP_UNICODE) {
1111 flags2 |= FLAGS2_UNICODE_STRINGS;
1112 }
1113 if (smb1_capabilities & CAP_STATUS32) {
1114 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1115 }
1116 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1117 flags2 |= FLAGS2_EXTENDED_SECURITY;
1118 }
1119 }
1120
1121 flags |= additional_flags;
1122 flags &= ~clear_flags;
1123 flags2 |= additional_flags2;
1124 flags2 &= ~clear_flags2;
1125
1126 *_flags = flags;
1127 *_flags2 = flags2;
1128 }
1129
1130 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1131
1132 static bool smb1cli_req_cancel(struct tevent_req *req)
1133 {
1134 struct smbXcli_req_state *state =
1135 tevent_req_data(req,
1136 struct smbXcli_req_state);
1137 uint8_t flags;
1138 uint16_t flags2;
1139 uint32_t pid;
1140 uint16_t mid;
1141 struct tevent_req *subreq;
1142 NTSTATUS status;
1143
1144 flags = CVAL(state->smb1.hdr, HDR_FLG);
1145 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1146 pid = SVAL(state->smb1.hdr, HDR_PID);
1147 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1148 mid = SVAL(state->smb1.hdr, HDR_MID);
1149
1150 subreq = smb1cli_req_create(state, state->ev,
1151 state->conn,
1152 SMBntcancel,
1153 flags, 0,
1154 flags2, 0,
1155 0, /* timeout */
1156 pid,
1157 state->tcon,
1158 state->session,
1159 0, NULL, /* vwv */
1160 0, NULL); /* bytes */
1161 if (subreq == NULL) {
1162 return false;
1163 }
1164 smb1cli_req_set_mid(subreq, mid);
1165
1166 status = smb1cli_req_chain_submit(&subreq, 1);
1167 if (!NT_STATUS_IS_OK(status)) {
1168 TALLOC_FREE(subreq);
1169 return false;
1170 }
1171 smb1cli_req_set_mid(subreq, 0);
1172
1173 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1174
1175 return true;
1176 }
1177
1178 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1179 {
1180 /* we do not care about the result */
1181 TALLOC_FREE(subreq);
1182 }
1183
1184 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1185 struct tevent_context *ev,
1186 struct smbXcli_conn *conn,
1187 uint8_t smb_command,
1188 uint8_t additional_flags,
1189 uint8_t clear_flags,
1190 uint16_t additional_flags2,
1191 uint16_t clear_flags2,
1192 uint32_t timeout_msec,
1193 uint32_t pid,
1194 struct smbXcli_tcon *tcon,
1195 struct smbXcli_session *session,
1196 uint8_t wct, uint16_t *vwv,
1197 int iov_count,
1198 struct iovec *bytes_iov)
1199 {
1200 struct tevent_req *req;
1201 struct smbXcli_req_state *state;
1202 uint8_t flags = 0;
1203 uint16_t flags2 = 0;
1204 uint16_t uid = 0;
1205 uint16_t tid = 0;
1206
1207 if (iov_count > MAX_SMB_IOV) {
1208 /*
1209 * Should not happen :-)
1210 */
1211 return NULL;
1212 }
1213
1214 req = tevent_req_create(mem_ctx, &state,
1215 struct smbXcli_req_state);
1216 if (req == NULL) {
1217 return NULL;
1218 }
1219 state->ev = ev;
1220 state->conn = conn;
1221 state->session = session;
1222 state->tcon = tcon;
1223
1224 if (session) {
1225 uid = session->smb1.session_id;
1226 }
1227
1228 if (tcon) {
1229 tid = tcon->smb1.tcon_id;
1230 }
1231
1232 state->smb1.recv_cmd = 0xFF;
1233 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1234 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1235 if (state->smb1.recv_iov == NULL) {
1236 TALLOC_FREE(req);
1237 return NULL;
1238 }
1239
1240 smb1cli_req_flags(conn->protocol,
1241 conn->smb1.capabilities,
1242 smb_command,
1243 additional_flags,
1244 clear_flags,
1245 &flags,
1246 additional_flags2,
1247 clear_flags2,
1248 &flags2);
1249
1250 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1251 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1252 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1253 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1254 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1255 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1256 SSVAL(state->smb1.hdr, HDR_TID, tid);
1257 SSVAL(state->smb1.hdr, HDR_PID, pid);
1258 SSVAL(state->smb1.hdr, HDR_UID, uid);
1259 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1260 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1261
1262 state->smb1.vwv = vwv;
1263
1264 SSVAL(state->smb1.bytecount_buf, 0, smbXcli_iov_len(bytes_iov, iov_count));
1265
1266 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1267 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1268 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1269 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1270 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1271 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1272 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1273 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1274
1275 if (iov_count != 0) {
1276 memcpy(&state->smb1.iov[4], bytes_iov,
1277 iov_count * sizeof(*bytes_iov));
1278 }
1279 state->smb1.iov_count = iov_count + 4;
1280
1281 if (timeout_msec > 0) {
1282 struct timeval endtime;
1283
1284 endtime = timeval_current_ofs_msec(timeout_msec);
1285 if (!tevent_req_set_endtime(req, ev, endtime)) {
1286 return req;
1287 }
1288 }
1289
1290 switch (smb_command) {
1291 case SMBtranss:
1292 case SMBtranss2:
1293 case SMBnttranss:
1294 state->one_way = true;
1295 break;
1296 case SMBntcancel:
1297 state->one_way = true;
1298 state->smb1.one_way_seqnum = true;
1299 break;
1300 case SMBlockingX:
1301 if ((wct == 8) &&
1302 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1303 state->one_way = true;
1304 }
1305 break;
1306 }
1307
1308 return req;
1309 }
1310
1311 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1312 struct iovec *iov, int iov_count,
1313 uint32_t *seqnum,
1314 bool one_way_seqnum)
1315 {
1316 TALLOC_CTX *frame = NULL;
1317 uint8_t *buf;
1318
1319 /*
1320 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1321 * iovec directly. MD5Update would do that just fine.
1322 */
1323
1324 if (iov_count < 4) {
1325 return NT_STATUS_INVALID_PARAMETER_MIX;
1326 }
1327 if (iov[0].iov_len != NBT_HDR_SIZE) {
1328 return NT_STATUS_INVALID_PARAMETER_MIX;
1329 }
1330 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1331 return NT_STATUS_INVALID_PARAMETER_MIX;
1332 }
1333 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1334 return NT_STATUS_INVALID_PARAMETER_MIX;
1335 }
1336 if (iov[3].iov_len != sizeof(uint16_t)) {
1337 return NT_STATUS_INVALID_PARAMETER_MIX;
1338 }
1339
1340 frame = talloc_stackframe();
1341
1342 buf = smbXcli_iov_concat(frame, iov, iov_count);
1343 if (buf == NULL) {
1344 return NT_STATUS_NO_MEMORY;
1345 }
1346
1347 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1348 one_way_seqnum);
1349 smb_signing_sign_pdu(conn->smb1.signing, buf, *seqnum);
1350 memcpy(iov[1].iov_base, buf+4, iov[1].iov_len);
1351
1352 TALLOC_FREE(frame);
1353 return NT_STATUS_OK;
1354 }
1355
1356 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1357 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1358 TALLOC_CTX *tmp_mem,
1359 uint8_t *inbuf);
1360
1361 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1362 struct smbXcli_req_state *state,
1363 struct iovec *iov, int iov_count)
1364 {
1365 struct tevent_req *subreq;
1366 NTSTATUS status;
1367 uint8_t cmd;
1368 uint16_t mid;
1369
1370 if (!smbXcli_conn_is_connected(state->conn)) {
1371 return NT_STATUS_CONNECTION_DISCONNECTED;
1372 }
1373
1374 if (state->conn->protocol > PROTOCOL_NT1) {
1375 return NT_STATUS_REVISION_MISMATCH;
1376 }
1377
1378 if (iov_count < 4) {
1379 return NT_STATUS_INVALID_PARAMETER_MIX;
1380 }
1381 if (iov[0].iov_len != NBT_HDR_SIZE) {
1382 return NT_STATUS_INVALID_PARAMETER_MIX;
1383 }
1384 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1385 return NT_STATUS_INVALID_PARAMETER_MIX;
1386 }
1387 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1388 return NT_STATUS_INVALID_PARAMETER_MIX;
1389 }
1390 if (iov[3].iov_len != sizeof(uint16_t)) {
1391 return NT_STATUS_INVALID_PARAMETER_MIX;
1392 }
1393
1394 cmd = CVAL(iov[1].iov_base, HDR_COM);
1395 if (cmd == SMBreadBraw) {
1396 if (smbXcli_conn_has_async_calls(state->conn)) {
1397 return NT_STATUS_INVALID_PARAMETER_MIX;
1398 }
1399 state->conn->smb1.read_braw_req = req;
1400 }
1401
1402 if (state->smb1.mid != 0) {
1403 mid = state->smb1.mid;
1404 } else {
1405 mid = smb1cli_alloc_mid(state->conn);
1406 }
1407 SSVAL(iov[1].iov_base, HDR_MID, mid);
1408
1409 _smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
1410
1411 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1412 &state->smb1.seqnum,
1413 state->smb1.one_way_seqnum);
1414
1415 if (!NT_STATUS_IS_OK(status)) {
1416 return status;
1417 }
1418
1419 /*
1420 * If we supported multiple encrytion contexts
1421 * here we'd look up based on tid.
1422 */
1423 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1424 char *buf, *enc_buf;
1425
1426 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1427 if (buf == NULL) {
1428 return NT_STATUS_NO_MEMORY;
1429 }
1430 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1431 (char *)buf, &enc_buf);
1432 TALLOC_FREE(buf);
1433 if (!NT_STATUS_IS_OK(status)) {
1434 DEBUG(0, ("Error in encrypting client message: %s\n",
1435 nt_errstr(status)));
1436 return status;
1437 }
1438 buf = (char *)talloc_memdup(state, enc_buf,
1439 smb_len_nbt(enc_buf)+4);
1440 SAFE_FREE(enc_buf);
1441 if (buf == NULL) {
1442 return NT_STATUS_NO_MEMORY;
1443 }
1444 iov[0].iov_base = (void *)buf;
1445 iov[0].iov_len = talloc_get_size(buf);
1446 iov_count = 1;
1447 }
1448
1449 if (state->conn->dispatch_incoming == NULL) {
1450 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1451 }
1452
1453 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1454
1455 subreq = writev_send(state, state->ev, state->conn->outgoing,
1456 state->conn->write_fd, false, iov, iov_count);
1457 if (subreq == NULL) {
1458 return NT_STATUS_NO_MEMORY;
1459 }
1460 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1461 return NT_STATUS_OK;
1462 }
1463
1464 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1465 struct tevent_context *ev,
1466 struct smbXcli_conn *conn,
1467 uint8_t smb_command,
1468 uint8_t additional_flags,
1469 uint8_t clear_flags,
1470 uint16_t additional_flags2,
1471 uint16_t clear_flags2,
1472 uint32_t timeout_msec,
1473 uint32_t pid,
1474 struct smbXcli_tcon *tcon,
1475 struct smbXcli_session *session,
1476 uint8_t wct, uint16_t *vwv,
1477 uint32_t num_bytes,
1478 const uint8_t *bytes)
1479 {
1480 struct tevent_req *req;
1481 struct iovec iov;
1482 NTSTATUS status;
1483
1484 iov.iov_base = discard_const_p(void, bytes);
1485 iov.iov_len = num_bytes;
1486
1487 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1488 additional_flags, clear_flags,
1489 additional_flags2, clear_flags2,
1490 timeout_msec,
1491 pid, tcon, session,
1492 wct, vwv, 1, &iov);
1493 if (req == NULL) {
1494 return NULL;
1495 }
1496 if (!tevent_req_is_in_progress(req)) {
1497 return tevent_req_post(req, ev);
1498 }
1499 status = smb1cli_req_chain_submit(&req, 1);
1500 if (tevent_req_nterror(req, status)) {
1501 return tevent_req_post(req, ev);
1502 }
1503 return req;
1504 }
1505
1506 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1507 {
1508 struct tevent_req *req =
1509 tevent_req_callback_data(subreq,
1510 struct tevent_req);
1511 struct smbXcli_req_state *state =
1512 tevent_req_data(req,
1513 struct smbXcli_req_state);
1514 ssize_t nwritten;
1515 int err;
1516
1517 nwritten = writev_recv(subreq, &err);
1518 TALLOC_FREE(subreq);
1519 if (nwritten == -1) {
1520 NTSTATUS status = map_nt_error_from_unix_common(err);
1521 smbXcli_conn_disconnect(state->conn, status);
1522 return;
1523 }
1524
1525 if (state->one_way) {
1526 state->inbuf = NULL;
1527 tevent_req_done(req);
1528 return;
1529 }
1530
1531 if (!smbXcli_req_set_pending(req)) {
1532 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1533 return;
1534 }
1535 }
1536
1537 static void smbXcli_conn_received(struct tevent_req *subreq)
1538 {
1539 struct smbXcli_conn *conn =
1540 tevent_req_callback_data(subreq,
1541 struct smbXcli_conn);
1542 TALLOC_CTX *frame = talloc_stackframe();
1543 NTSTATUS status;
1544 uint8_t *inbuf;
1545 ssize_t received;
1546 int err;
1547
1548 if (subreq != conn->read_smb_req) {
1549 DEBUG(1, ("Internal error: cli_smb_received called with "
1550 "unexpected subreq\n"));
1551 status = NT_STATUS_INTERNAL_ERROR;
1552 smbXcli_conn_disconnect(conn, status);
1553 TALLOC_FREE(frame);
1554 return;
1555 }
1556 conn->read_smb_req = NULL;
1557
1558 received = read_smb_recv(subreq, frame, &inbuf, &err);
1559 TALLOC_FREE(subreq);
1560 if (received == -1) {
1561 status = map_nt_error_from_unix_common(err);
1562 smbXcli_conn_disconnect(conn, status);
1563 TALLOC_FREE(frame);
1564 return;
1565 }
1566
1567 status = conn->dispatch_incoming(conn, frame, inbuf);
1568 TALLOC_FREE(frame);
1569 if (NT_STATUS_IS_OK(status)) {
1570 /*
1571 * We should not do any more processing
1572 * as the dispatch function called
1573 * tevent_req_done().
1574 */
1575 return;
1576 } else if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1577 /*
1578 * We got an error, so notify all pending requests
1579 */
1580 smbXcli_conn_disconnect(conn, status);
1581 return;
1582 }
1583
1584 /*
1585 * We got NT_STATUS_RETRY, so we may ask for a
1586 * next incoming pdu.
1587 */
1588 if (!smbXcli_conn_receive_next(conn)) {
1589 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1590 }
1591 }
1592
1593 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1594 struct iovec **piov, int *pnum_iov)
1595 {
1596 struct iovec *iov;
1597 int num_iov;
1598 size_t buflen;
1599 size_t taken;
1600 size_t remaining;
1601 uint8_t *hdr;
1602 uint8_t cmd;
1603 uint32_t wct_ofs;
1604
1605 buflen = smb_len_nbt(buf);
1606 taken = 0;
1607
1608 hdr = buf + NBT_HDR_SIZE;
1609
1610 if (buflen < MIN_SMB_SIZE) {
1611 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1612 }
1613
1614 /*
1615 * This returns iovec elements in the following order:
1616 *
1617 * - SMB header
1618 *
1619 * - Parameter Block
1620 * - Data Block
1621 *
1622 * - Parameter Block
1623 * - Data Block
1624 *
1625 * - Parameter Block
1626 * - Data Block
1627 */
1628 num_iov = 1;
1629
1630 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1631 if (iov == NULL) {
1632 return NT_STATUS_NO_MEMORY;
1633 }
1634 iov[0].iov_base = hdr;
1635 iov[0].iov_len = HDR_WCT;
1636 taken += HDR_WCT;
1637
1638 cmd = CVAL(hdr, HDR_COM);
1639 wct_ofs = HDR_WCT;
1640
1641 while (true) {
1642 size_t len = buflen - taken;
1643 struct iovec *cur;
1644 struct iovec *iov_tmp;
1645 uint8_t wct;
1646 uint32_t bcc_ofs;
1647 uint16_t bcc;
1648 size_t needed;
1649
1650 /*
1651 * we need at least WCT and BCC
1652 */
1653 needed = sizeof(uint8_t) + sizeof(uint16_t);
1654 if (len < needed) {
1655 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1656 __location__, (int)len, (int)needed));
1657 goto inval;
1658 }
1659
1660 /*
1661 * Now we check if the specified words are there
1662 */
1663 wct = CVAL(hdr, wct_ofs);
1664 needed += wct * sizeof(uint16_t);
1665 if (len < needed) {
1666 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1667 __location__, (int)len, (int)needed));
1668 goto inval;
1669 }
1670
1671 /*
1672 * Now we check if the specified bytes are there
1673 */
1674 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1675 bcc = SVAL(hdr, bcc_ofs);
1676 needed += bcc * sizeof(uint8_t);
1677 if (len < needed) {
1678 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1679 __location__, (int)len, (int)needed));
1680 goto inval;
1681 }
1682
1683 /*
1684 * we allocate 2 iovec structures for words and bytes
1685 */
1686 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1687 num_iov + 2);
1688 if (iov_tmp == NULL) {
1689 TALLOC_FREE(iov);
1690 return NT_STATUS_NO_MEMORY;
1691 }
1692 iov = iov_tmp;
1693 cur = &iov[num_iov];
1694 num_iov += 2;
1695
1696 cur[0].iov_len = wct * sizeof(uint16_t);
1697 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1698 cur[1].iov_len = bcc * sizeof(uint8_t);
1699 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1700
1701 taken += needed;
1702
1703 if (!smb1cli_is_andx_req(cmd)) {
1704 /*
1705 * If the current command does not have AndX chanining
1706 * we are done.
1707 */
1708 break;
1709 }
1710
1711 if (wct == 0 && bcc == 0) {
1712 /*
1713 * An empty response also ends the chain,
1714 * most likely with an error.
1715 */
1716 break;
1717 }
1718
1719 if (wct < 2) {
1720 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1721 __location__, (int)wct, (int)cmd));
1722 goto inval;
1723 }
1724 cmd = CVAL(cur[0].iov_base, 0);
1725 if (cmd == 0xFF) {
1726 /*
1727 * If it is the end of the chain we are also done.
1728 */
1729 break;
1730 }
1731 wct_ofs = SVAL(cur[0].iov_base, 2);
1732
1733 if (wct_ofs < taken) {
1734 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1735 }
1736 if (wct_ofs > buflen) {
1737 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1738 }
1739
1740 /*
1741 * we consumed everything up to the start of the next
1742 * parameter block.
1743 */
1744 taken = wct_ofs;
1745 }
1746
1747 remaining = buflen - taken;
1748
1749 if (remaining > 0 && num_iov >= 3) {
1750 /*
1751 * The last DATA block gets the remaining
1752 * bytes, this is needed to support
1753 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1754 */
1755 iov[num_iov-1].iov_len += remaining;
1756 }
1757
1758 *piov = iov;
1759 *pnum_iov = num_iov;
1760 return NT_STATUS_OK;
1761
1762 inval:
1763 TALLOC_FREE(iov);
1764 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1765 }
1766
1767 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1768 TALLOC_CTX *tmp_mem,
1769 uint8_t *inbuf)
1770 {
1771 struct tevent_req *req;
1772 struct smbXcli_req_state *state;
1773 NTSTATUS status;
1774 size_t num_pending;
1775 size_t i;
1776 uint8_t cmd;
1777 uint16_t mid;
1778 bool oplock_break;
1779 const uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1780 struct iovec *iov = NULL;
1781 int num_iov = 0;
1782 struct tevent_req **chain = NULL;
1783 size_t num_chained = 0;
1784 size_t num_responses = 0;
1785
1786 if (conn->smb1.read_braw_req != NULL) {
1787 req = conn->smb1.read_braw_req;
1788 conn->smb1.read_braw_req = NULL;
1789 state = tevent_req_data(req, struct smbXcli_req_state);
1790
1791 smbXcli_req_unset_pending(req);
1792
1793 if (state->smb1.recv_iov == NULL) {
1794 /*
1795 * For requests with more than
1796 * one response, we have to readd the
1797 * recv_iov array.
1798 */
1799 state->smb1.recv_iov = talloc_zero_array(state,
1800 struct iovec,
1801 3);
1802 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1803 return NT_STATUS_OK;
1804 }
1805 }
1806
1807 state->smb1.recv_iov[0].iov_base = (void *)(inbuf + NBT_HDR_SIZE);
1808 state->smb1.recv_iov[0].iov_len = smb_len_nbt(inbuf);
1809 ZERO_STRUCT(state->smb1.recv_iov[1]);
1810 ZERO_STRUCT(state->smb1.recv_iov[2]);
1811
1812 state->smb1.recv_cmd = SMBreadBraw;
1813 state->smb1.recv_status = NT_STATUS_OK;
1814 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1815
1816 tevent_req_done(req);
1817 return NT_STATUS_OK;
1818 }
1819
1820 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1821 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1822 DEBUG(10, ("Got non-SMB PDU\n"));
1823 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1824 }
1825
1826 /*
1827 * If we supported multiple encrytion contexts
1828 * here we'd look up based on tid.
1829 */
1830 if (common_encryption_on(conn->smb1.trans_enc)
1831 && (CVAL(inbuf, 0) == 0)) {
1832 uint16_t enc_ctx_num;
1833
1834 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1835 if (!NT_STATUS_IS_OK(status)) {
1836 DEBUG(10, ("get_enc_ctx_num returned %s\n",
1837 nt_errstr(status)));
1838 return status;
1839 }
1840
1841 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1842 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1843 enc_ctx_num,
1844 conn->smb1.trans_enc->enc_ctx_num));
1845 return NT_STATUS_INVALID_HANDLE;
1846 }
1847
1848 status = common_decrypt_buffer(conn->smb1.trans_enc,
1849 (char *)inbuf);
1850 if (!NT_STATUS_IS_OK(status)) {
1851 DEBUG(10, ("common_decrypt_buffer returned %s\n",
1852 nt_errstr(status)));
1853 return status;
1854 }
1855 }
1856
1857 mid = SVAL(inhdr, HDR_MID);
1858 num_pending = talloc_array_length(conn->pending);
1859
1860 for (i=0; i<num_pending; i++) {
1861 if (mid == smb1cli_req_mid(conn->pending[i])) {
1862 break;
1863 }
1864 }
1865 if (i == num_pending) {
1866 /* Dump unexpected reply */
1867 return NT_STATUS_RETRY;
1868 }
1869
1870 oplock_break = false;
1871
1872 if (mid == 0xffff) {
1873 /*
1874 * Paranoia checks that this is really an oplock break request.
1875 */
1876 oplock_break = (smb_len_nbt(inbuf) == 51); /* hdr + 8 words */
1877 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
1878 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
1879 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
1880 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
1881
1882 if (!oplock_break) {
1883 /* Dump unexpected reply */
1884 return NT_STATUS_RETRY;
1885 }
1886 }
1887
1888 req = conn->pending[i];
1889 state = tevent_req_data(req, struct smbXcli_req_state);
1890
1891 if (!oplock_break /* oplock breaks are not signed */
1892 && !smb_signing_check_pdu(conn->smb1.signing,
1893 inbuf, state->smb1.seqnum+1)) {
1894 DEBUG(10, ("cli_check_sign_mac failed\n"));
1895 return NT_STATUS_ACCESS_DENIED;
1896 }
1897
1898 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
1899 &iov, &num_iov);
1900 if (!NT_STATUS_IS_OK(status)) {
1901 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
1902 nt_errstr(status)));
1903 return status;
1904 }
1905
1906 cmd = CVAL(inhdr, HDR_COM);
1907 status = smb1cli_pull_raw_error(inhdr);
1908
1909 if (state->smb1.chained_requests == NULL) {
1910 if (num_iov != 3) {
1911 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1912 }
1913
1914 smbXcli_req_unset_pending(req);
1915
1916 if (state->smb1.recv_iov == NULL) {
1917 /*
1918 * For requests with more than
1919 * one response, we have to readd the
1920 * recv_iov array.
1921 */
1922 state->smb1.recv_iov = talloc_zero_array(state,
1923 struct iovec,
1924 3);
1925 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1926 return NT_STATUS_OK;
1927 }
1928 }
1929
1930 state->smb1.recv_cmd = cmd;
1931 state->smb1.recv_status = status;
1932 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1933
1934 state->smb1.recv_iov[0] = iov[0];
1935 state->smb1.recv_iov[1] = iov[1];
1936 state->smb1.recv_iov[2] = iov[2];
1937
1938 if (talloc_array_length(conn->pending) == 0) {
1939 tevent_req_done(req);
1940 return NT_STATUS_OK;
1941 }
1942
1943 tevent_req_defer_callback(req, state->ev);
1944 tevent_req_done(req);
1945 return NT_STATUS_RETRY;
1946 }
1947
1948 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
1949 num_chained = talloc_array_length(chain);
1950 num_responses = (num_iov - 1)/2;
1951
1952 if (num_responses > num_chained) {
1953 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1954 }
1955
1956 for (i=0; i<num_chained; i++) {
1957 size_t iov_idx = 1 + (i*2);
1958 struct iovec *cur = &iov[iov_idx];
1959 uint8_t *inbuf_ref;
1960
1961 req = chain[i];
1962 state = tevent_req_data(req, struct smbXcli_req_state);
1963
1964 smbXcli_req_unset_pending(req);
1965
1966 /*
1967 * as we finish multiple requests here
1968 * we need to defer the callbacks as
1969 * they could destroy our current stack state.
1970 */
1971 tevent_req_defer_callback(req, state->ev);
1972
1973 if (i >= num_responses) {
1974 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
1975 continue;
1976 }
1977
1978 if (state->smb1.recv_iov == NULL) {
1979 /*
1980 * For requests with more than
1981 * one response, we have to readd the
1982 * recv_iov array.
1983 */
1984 state->smb1.recv_iov = talloc_zero_array(state,
1985 struct iovec,
1986 3);
1987 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1988 continue;
1989 }
1990 }
1991
1992 state->smb1.recv_cmd = cmd;
1993
1994 if (i == (num_responses - 1)) {
1995 /*
1996 * The last request in the chain gets the status
1997 */
1998 state->smb1.recv_status = status;
1999 } else {
2000 cmd = CVAL(cur[0].iov_base, 0);
2001 state->smb1.recv_status = NT_STATUS_OK;
2002 }
2003
2004 state->inbuf = inbuf;
2005
2006 /*
2007 * Note: here we use talloc_reference() in a way
2008 * that does not expose it to the caller.
2009 */
2010 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2011 if (tevent_req_nomem(inbuf_ref, req)) {
2012 continue;
2013 }
2014
2015 /* copy the related buffers */
2016 state->smb1.recv_iov[0] = iov[0];
2017 state->smb1.recv_iov[1] = cur[0];
2018 state->smb1.recv_iov[2] = cur[1];
2019
2020 tevent_req_done(req);
2021 }
2022
2023 return NT_STATUS_RETRY;
2024 }
2025
2026 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2027 TALLOC_CTX *mem_ctx,
2028 struct iovec **piov,
2029 uint8_t **phdr,
2030 uint8_t *pwct,
2031 uint16_t **pvwv,
2032 uint32_t *pvwv_offset,
2033 uint32_t *pnum_bytes,
2034 uint8_t **pbytes,
2035 uint32_t *pbytes_offset,
2036 uint8_t **pinbuf,
2037 const struct smb1cli_req_expected_response *expected,
2038 size_t num_expected)
2039 {
2040 struct smbXcli_req_state *state =
2041 tevent_req_data(req,
2042 struct smbXcli_req_state);
2043 NTSTATUS status = NT_STATUS_OK;
2044 struct iovec *recv_iov = NULL;
2045 uint8_t *hdr = NULL;
2046 uint8_t wct = 0;
2047 uint32_t vwv_offset = 0;
2048 uint16_t *vwv = NULL;
2049 uint32_t num_bytes = 0;
2050 uint32_t bytes_offset = 0;
2051 uint8_t *bytes = NULL;
2052 size_t i;
2053 bool found_status = false;
2054 bool found_size = false;
2055
2056 if (piov != NULL) {
2057 *piov = NULL;
2058 }
2059 if (phdr != NULL) {
2060 *phdr = 0;
2061 }
2062 if (pwct != NULL) {
2063 *pwct = 0;
2064 }
2065 if (pvwv != NULL) {
2066 *pvwv = NULL;
2067 }
2068 if (pvwv_offset != NULL) {
2069 *pvwv_offset = 0;
2070 }
2071 if (pnum_bytes != NULL) {
2072 *pnum_bytes = 0;
2073 }
2074 if (pbytes != NULL) {
2075 *pbytes = NULL;
2076 }
2077 if (pbytes_offset != NULL) {
2078 *pbytes_offset = 0;
2079 }
2080 if (pinbuf != NULL) {
2081 *pinbuf = NULL;
2082 }
2083
2084 if (state->inbuf != NULL) {
2085 recv_iov = state->smb1.recv_iov;
2086 state->smb1.recv_iov = NULL;
2087 if (state->smb1.recv_cmd != SMBreadBraw) {
2088 hdr = (uint8_t *)recv_iov[0].iov_base;
2089 wct = recv_iov[1].iov_len/2;
2090 vwv = (uint16_t *)recv_iov[1].iov_base;
2091 vwv_offset = PTR_DIFF(vwv, hdr);
2092 num_bytes = recv_iov[2].iov_len;
2093 bytes = (uint8_t *)recv_iov[2].iov_base;
2094 bytes_offset = PTR_DIFF(bytes, hdr);
2095 }
2096 }
2097
2098 if (tevent_req_is_nterror(req, &status)) {
2099 for (i=0; i < num_expected; i++) {
2100 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2101 found_status = true;
2102 break;
2103 }
2104 }
2105
2106 if (found_status) {
2107 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2108 }
2109
2110 return status;
2111 }
2112
2113 if (num_expected == 0) {
2114 found_status = true;
2115 found_size = true;
2116 }
2117
2118 status = state->smb1.recv_status;
2119
2120 for (i=0; i < num_expected; i++) {
2121 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2122 continue;
2123 }
2124
2125 found_status = true;
2126 if (expected[i].wct == 0) {
2127 found_size = true;
2128 break;
2129 }
2130
2131 if (expected[i].wct == wct) {
2132 found_size = true;
2133 break;
2134 }
2135 }
2136
2137 if (!found_status) {
2138 return status;
2139 }
2140
2141 if (!found_size) {
2142 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2143 }
2144
2145 if (piov != NULL) {
2146 *piov = talloc_move(mem_ctx, &recv_iov);
2147 }
2148
2149 if (phdr != NULL) {
2150 *phdr = hdr;
2151 }
2152 if (pwct != NULL) {
2153 *pwct = wct;
2154 }
2155 if (pvwv != NULL) {
2156 *pvwv = vwv;
2157 }
2158 if (pvwv_offset != NULL) {
2159 *pvwv_offset = vwv_offset;
2160 }
2161 if (pnum_bytes != NULL) {
2162 *pnum_bytes = num_bytes;
2163 }
2164 if (pbytes != NULL) {
2165 *pbytes = bytes;
2166 }
2167 if (pbytes_offset != NULL) {
2168 *pbytes_offset = bytes_offset;
2169 }
2170 if (pinbuf != NULL) {
2171 *pinbuf = state->inbuf;
2172 }
2173
2174 return status;
2175 }
2176
2177 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2178 {
2179 size_t wct_ofs;
2180 int i;
2181
2182 wct_ofs = HDR_WCT;
2183
2184 for (i=0; i<num_reqs; i++) {
2185 struct smbXcli_req_state *state;
2186 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2187 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2188 state->smb1.iov_count-2);
2189 wct_ofs = (wct_ofs + 3) & ~3;
2190 }
2191 return wct_ofs;
2192 }
2193
2194 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2195 {
2196 struct smbXcli_req_state *first_state =
2197 tevent_req_data(reqs[0],
2198 struct smbXcli_req_state);
2199 struct smbXcli_req_state *state;
2200 size_t wct_offset;
2201 size_t chain_padding = 0;
2202 int i, iovlen;
2203 struct iovec *iov = NULL;
2204 struct iovec *this_iov;
2205 NTSTATUS status;
2206 size_t nbt_len;
2207
2208 if (num_reqs == 1) {
2209 return smb1cli_req_writev_submit(reqs[0], first_state,
2210 first_state->smb1.iov,
2211 first_state->smb1.iov_count);
2212 }
2213
2214 iovlen = 0;
2215 for (i=0; i<num_reqs; i++) {
2216 if (!tevent_req_is_in_progress(reqs[i])) {
2217 return NT_STATUS_INTERNAL_ERROR;
2218 }
2219
2220 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2221
2222 if (state->smb1.iov_count < 4) {
2223 return NT_STATUS_INVALID_PARAMETER_MIX;
2224 }
2225
2226 if (i == 0) {
2227 /*
2228 * The NBT and SMB header
2229 */
2230 iovlen += 2;
2231 } else {
2232 /*
2233 * Chain padding
2234 */
2235 iovlen += 1;
2236 }
2237
2238 /*
2239 * words and bytes
2240 */
2241 iovlen += state->smb1.iov_count - 2;
2242 }
2243
2244 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2245 if (iov == NULL) {
2246 return NT_STATUS_NO_MEMORY;
2247 }
2248
2249 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2250 first_state, reqs, sizeof(*reqs) * num_reqs);
2251 if (first_state->smb1.chained_requests == NULL) {
2252 TALLOC_FREE(iov);
2253 return NT_STATUS_NO_MEMORY;
2254 }
2255
2256 wct_offset = HDR_WCT;
2257 this_iov = iov;
2258
2259 for (i=0; i<num_reqs; i++) {
2260 size_t next_padding = 0;
2261 uint16_t *vwv;
2262
2263 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2264
2265 if (i < num_reqs-1) {
2266 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2267 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2268 TALLOC_FREE(iov);
2269 TALLOC_FREE(first_state->smb1.chained_requests);
2270 return NT_STATUS_INVALID_PARAMETER_MIX;
2271 }
2272 }
2273
2274 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2275 state->smb1.iov_count-2) + 1;
2276 if ((wct_offset % 4) != 0) {
2277 next_padding = 4 - (wct_offset % 4);
2278 }
2279 wct_offset += next_padding;
2280 vwv = state->smb1.vwv;
2281
2282 if (i < num_reqs-1) {
2283 struct smbXcli_req_state *next_state =
2284 tevent_req_data(reqs[i+1],
2285 struct smbXcli_req_state);
2286 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2287 SCVAL(vwv+0, 1, 0);
2288 SSVAL(vwv+1, 0, wct_offset);
2289 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2290 /* properly end the chain */
2291 SCVAL(vwv+0, 0, 0xff);
2292 SCVAL(vwv+0, 1, 0xff);
2293 SSVAL(vwv+1, 0, 0);
2294 }
2295
2296 if (i == 0) {
2297 /*
2298 * The NBT and SMB header
2299 */
2300 this_iov[0] = state->smb1.iov[0];
2301 this_iov[1] = state->smb1.iov[1];
2302 this_iov += 2;
2303 } else {
2304 /*
2305 * This one is a bit subtle. We have to add
2306 * chain_padding bytes between the requests, and we
2307 * have to also include the wct field of the
2308 * subsequent requests. We use the subsequent header
2309 * for the padding, it contains the wct field in its
2310 * last byte.
2311 */
2312 this_iov[0].iov_len = chain_padding+1;
2313 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2314 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2315 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2316 this_iov += 1;
2317 }
2318
2319 /*
2320 * copy the words and bytes
2321 */
2322 memcpy(this_iov, state->smb1.iov+2,
2323 sizeof(struct iovec) * (state->smb1.iov_count-2));
2324 this_iov += state->smb1.iov_count - 2;
2325 chain_padding = next_padding;
2326 }
2327
2328 nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
2329 if (nbt_len > first_state->conn->smb1.max_xmit) {
2330 TALLOC_FREE(iov);
2331 TALLOC_FREE(first_state->smb1.chained_requests);
2332 return NT_STATUS_INVALID_PARAMETER_MIX;
2333 }
2334
2335 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2336 if (!NT_STATUS_IS_OK(status)) {
2337 TALLOC_FREE(iov);
2338 TALLOC_FREE(first_state->smb1.chained_requests);
2339 return status;
2340 }
2341
2342 return NT_STATUS_OK;
2343 }
2344
2345 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2346 {
2347 return ((tevent_queue_length(conn->outgoing) != 0)
2348 || (talloc_array_length(conn->pending) != 0));
2349 }
2350
2351 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2352 {
2353 return conn->smb2.server.capabilities;
2354 }
2355
2356 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2357 {
2358 return conn->smb2.server.security_mode;
2359 }
2360
2361 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2362 {
2363 return conn->smb2.server.max_trans_size;
2364 }
2365
2366 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2367 {
2368 return conn->smb2.server.max_read_size;
2369 }
2370
2371 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2372 {
2373 return conn->smb2.server.max_write_size;
2374 }
2375
2376 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2377 uint16_t max_credits)
2378 {
2379 conn->smb2.max_credits = max_credits;
2380 }
2381
2382 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2383
2384 static bool smb2cli_req_cancel(struct tevent_req *req)
2385 {
2386 struct smbXcli_req_state *state =
2387 tevent_req_data(req,
2388 struct smbXcli_req_state);
2389 uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2390 uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2391 uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
2392 struct smbXcli_tcon *tcon = state->tcon;
2393 struct smbXcli_session *session = state->session;
2394 uint8_t *fixed = state->smb2.pad;
2395 uint16_t fixed_len = 4;
2396 struct tevent_req *subreq;
2397 struct smbXcli_req_state *substate;
2398 NTSTATUS status;
2399
2400 SSVAL(fixed, 0, 0x04);
2401 SSVAL(fixed, 2, 0);
2402
2403 subreq = smb2cli_req_create(state, state->ev,
2404 state->conn,
2405 SMB2_OP_CANCEL,
2406 flags, 0,
2407 0, /* timeout */
2408 tcon, session,
2409 fixed, fixed_len,
2410 NULL, 0);
2411 if (subreq == NULL) {
2412 return false;
2413 }
2414 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2415
2416 if (flags & SMB2_HDR_FLAG_ASYNC) {
2417 mid = 0;
2418 }
2419
2420 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
2421 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2422 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
2423
2424 status = smb2cli_req_compound_submit(&subreq, 1);
2425 if (!NT_STATUS_IS_OK(status)) {
2426 TALLOC_FREE(subreq);
2427 return false;
2428 }
2429
2430 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2431
2432 return true;
2433 }
2434
2435 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2436 {
2437 /* we do not care about the result */
2438 TALLOC_FREE(subreq);
2439 }
2440
2441 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2442 struct tevent_context *ev,
2443 struct smbXcli_conn *conn,
2444 uint16_t cmd,
2445 uint32_t additional_flags,
2446 uint32_t clear_flags,
2447 uint32_t timeout_msec,
2448 struct smbXcli_tcon *tcon,
2449 struct smbXcli_session *session,
2450 const uint8_t *fixed,
2451 uint16_t fixed_len,
2452 const uint8_t *dyn,
2453 uint32_t dyn_len)
2454 {
2455 struct tevent_req *req;
2456 struct smbXcli_req_state *state;
2457 uint32_t flags = 0;
2458 uint32_t tid = 0;
2459 uint64_t uid = 0;
2460 bool use_channel_sequence = false;
2461 uint16_t channel_sequence = 0;
2462
2463 req = tevent_req_create(mem_ctx, &state,
2464 struct smbXcli_req_state);
2465 if (req == NULL) {
2466 return NULL;
2467 }
2468
2469 state->ev = ev;
2470 state->conn = conn;
2471 state->session = session;
2472 state->tcon = tcon;
2473
2474 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2475 use_channel_sequence = true;
2476 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2477 use_channel_sequence = true;
2478 }
2479
2480 if (session) {
2481 uid = session->smb2->session_id;
2482
2483 if (use_channel_sequence) {
2484 channel_sequence = session->smb2->channel_sequence;
2485 }
2486
2487 state->smb2.should_sign = session->smb2->should_sign;
2488 state->smb2.should_encrypt = session->smb2->should_encrypt;
2489
2490 if (cmd == SMB2_OP_SESSSETUP &&
2491 session->smb2->signing_key.length != 0) {
2492 state->smb2.should_sign = true;
2493 }
2494
2495 if (cmd == SMB2_OP_SESSSETUP &&
2496 session->smb2_channel.signing_key.length == 0) {
2497 state->smb2.should_encrypt = false;
2498 }
2499 }
2500
2501 if (tcon) {
2502 tid = tcon->smb2.tcon_id;
2503
2504 if (tcon->smb2.should_encrypt) {
2505 state->smb2.should_encrypt = true;
2506 }
2507 }
2508
2509 if (state->smb2.should_encrypt) {
2510 state->smb2.should_sign = false;
2511 }
2512
2513 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2514 if (state->smb2.recv_iov == NULL) {
2515 TALLOC_FREE(req);
2516 return NULL;
2517 }
2518
2519 flags |= additional_flags;
2520 flags &= ~clear_flags;
2521
2522 state->smb2.fixed = fixed;
2523 state->smb2.fixed_len = fixed_len;
2524 state->smb2.dyn = dyn;
2525 state->smb2.dyn_len = dyn_len;
2526
2527 if (state->smb2.should_encrypt) {
2528 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2529 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2530 }
2531
2532 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
2533 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
2534 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
2535 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
2536 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
2537 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
2538 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
2539 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
2540
2541 switch (cmd) {
2542 case SMB2_OP_CANCEL:
2543 state->one_way = true;
2544 break;
2545 case SMB2_OP_BREAK:
2546 /*
2547 * If this is a dummy request, it will have
2548 * UINT64_MAX as message id.
2549 * If we send on break acknowledgement,
2550 * this gets overwritten later.
2551 */
2552 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2553 break;
2554 }
2555
2556 if (timeout_msec > 0) {
2557 struct timeval endtime;
2558
2559 endtime = timeval_current_ofs_msec(timeout_msec);
2560 if (!tevent_req_set_endtime(req, ev, endtime)) {
2561 return req;
2562 }
2563 }
2564
2565 return req;
2566 }
2567
2568 void smb2cli_req_set_notify_async(struct tevent_req *req)
2569 {
2570 struct smbXcli_req_state *state =
2571 tevent_req_data(req,
2572 struct smbXcli_req_state);
2573
2574 state->smb2.notify_async = true;
2575 }
2576
2577 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2578 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2579 TALLOC_CTX *tmp_mem,
2580 uint8_t *inbuf);
2581
2582 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2583 int num_reqs)
2584 {
2585 struct smbXcli_req_state *state;
2586 struct tevent_req *subreq;
2587 struct iovec *iov;
2588 int i, num_iov, nbt_len;
2589
2590 /*
2591 * 1 for the nbt length
2592 * per request: TRANSFORM, HDR, fixed, dyn, padding
2593 * -1 because the last one does not need padding
2594 */
2595
2596 iov = talloc_array(reqs[0], struct iovec, 1 + 5*num_reqs - 1);
2597 if (iov == NULL) {
2598 return NT_STATUS_NO_MEMORY;
2599 }
2600
2601 num_iov = 1;
2602 nbt_len = 0;
2603
2604 for (i=0; i<num_reqs; i++) {
2605 int tf_iov;
2606 int hdr_iov;
2607 size_t reqlen;
2608 bool ret;
2609 uint16_t opcode;
2610 uint64_t avail;
2611 uint16_t charge;
2612 uint16_t credits;
2613 uint64_t mid;
2614 const DATA_BLOB *signing_key = NULL;
2615 const DATA_BLOB *encryption_key = NULL;
2616
2617 if (!tevent_req_is_in_progress(reqs[i])) {
2618 return NT_STATUS_INTERNAL_ERROR;
2619 }
2620
2621 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2622
2623 if (!smbXcli_conn_is_connected(state->conn)) {
2624 return NT_STATUS_CONNECTION_DISCONNECTED;
2625 }
2626
2627 if ((state->conn->protocol != PROTOCOL_NONE) &&
2628 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2629 return NT_STATUS_REVISION_MISMATCH;
2630 }
2631
2632 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2633 if (opcode == SMB2_OP_CANCEL) {
2634 goto skip_credits;
2635 }
2636
2637 avail = UINT64_MAX - state->conn->smb2.mid;
2638 if (avail < 1) {
2639 return NT_STATUS_CONNECTION_ABORTED;
2640 }
2641
2642 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2643 charge = (MAX(state->smb2.dyn_len, 1) - 1)/ 65536 + 1;
2644 } else {
2645 charge = 1;
2646 }
2647
2648 charge = MAX(state->smb2.credit_charge, charge);
2649
2650 avail = MIN(avail, state->conn->smb2.cur_credits);
2651 if (avail < charge) {
2652 return NT_STATUS_INTERNAL_ERROR;
2653 }
2654
2655 credits = 0;
2656 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
2657 credits = state->conn->smb2.max_credits -
2658 state->conn->smb2.cur_credits;
2659 }
2660 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
2661 credits += 1;
2662 }
2663
2664 mid = state->conn->smb2.mid;
2665 state->conn->smb2.mid += charge;
2666 state->conn->smb2.cur_credits -= charge;
2667
2668 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2669 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
2670 }
2671 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
2672 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2673
2674 skip_credits:
2675 if (state->session) {
2676 /*
2677 * We prefer the channel signing key if it is
2678 * already there.
2679 */
2680 if (state->smb2.should_sign) {
2681 signing_key = &state->session->smb2_channel.signing_key;
2682 }
2683
2684 /*
2685 * If it is a channel binding, we already have the main
2686 * signing key and try that one.
2687 */
2688 if (signing_key && signing_key->length == 0) {
2689 signing_key = &state->session->smb2->signing_key;
2690 }
2691
2692 /*
2693 * If we do not have any session key yet, we skip the
2694 * signing of SMB2_OP_SESSSETUP requests.
2695 */
2696 if (signing_key && signing_key->length == 0) {
2697 signing_key = NULL;
2698 }
2699
2700 if (state->smb2.should_encrypt) {
2701 encryption_key = &state->session->smb2->encryption_key;
2702 }
2703 }
2704
2705 if (encryption_key) {
2706 tf_iov = num_iov;
2707 iov[num_iov].iov_base = state->smb2.transform;
2708 iov[num_iov].iov_len = sizeof(state->smb2.transform);
2709 num_iov += 1;
2710 }
2711
2712 hdr_iov = num_iov;
2713 iov[num_iov].iov_base = state->smb2.hdr;
2714 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
2715 num_iov += 1;
2716
2717 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2718 iov[num_iov].iov_len = state->smb2.fixed_len;
2719 num_iov += 1;
2720
2721 if (state->smb2.dyn != NULL) {
2722 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2723 iov[num_iov].iov_len = state->smb2.dyn_len;
2724 num_iov += 1;
2725 }
2726
2727 reqlen = sizeof(state->smb2.hdr);
2728 reqlen += state->smb2.fixed_len;
2729 reqlen += state->smb2.dyn_len;
2730
2731 if (i < num_reqs-1) {
2732 if ((reqlen % 8) > 0) {
2733 uint8_t pad = 8 - (reqlen % 8);
2734 iov[num_iov].iov_base = state->smb2.pad;
2735 iov[num_iov].iov_len = pad;
2736 num_iov += 1;
2737 reqlen += pad;
2738 }
2739 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
2740 }
2741
2742 if (encryption_key) {
2743 NTSTATUS status;
2744 uint8_t *buf;
2745 int vi;
2746
2747 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
2748 state->session->smb2->nonce_low);
2749 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
2750 state->session->smb2->nonce_high);
2751
2752 state->session->smb2->nonce_low += 1;
2753 if (state->session->smb2->nonce_low == 0) {
2754 state->session->smb2->nonce_high += 1;
2755 state->session->smb2->nonce_low += 1;
2756 }
2757
2758 SBVAL(state->smb2.transform, SMB2_TF_MSG_SIZE,
2759 reqlen);
2760
2761 buf = talloc_array(iov, uint8_t, reqlen);
2762 if (buf == NULL) {
2763 return NT_STATUS_NO_MEMORY;
2764 }
2765
2766 reqlen += SMB2_TF_HDR_SIZE;
2767
2768 /*
2769 * We copy the buffers before encrypting them,
2770 * this is at least currently needed for the
2771 * to keep state->smb2.hdr.
2772 *
2773 * Also the callers may expect there buffers
2774 * to be const.
2775 */
2776 for (vi = hdr_iov; vi < num_iov; vi++) {
2777 struct iovec *v = &iov[vi];
2778 const uint8_t *o = (const uint8_t *)v->iov_base;
2779
2780 memcpy(buf, o, v->iov_len);
2781 v->iov_base = (void *)buf;
2782 buf += v->iov_len;
2783 }
2784
2785 status = smb2_signing_encrypt_pdu(*encryption_key,
2786 state->session->conn->protocol,
2787 &iov[tf_iov], num_iov - tf_iov);
2788 if (!NT_STATUS_IS_OK(status)) {
2789 return status;
2790 }
2791 } else if (signing_key) {
2792 NTSTATUS status;
2793
2794 status = smb2_signing_sign_pdu(*signing_key,
2795 state->session->conn->protocol,
2796 &iov[hdr_iov], num_iov - hdr_iov);
2797 if (!NT_STATUS_IS_OK(status)) {
2798 return status;
2799 }
2800 }
2801
2802 nbt_len += reqlen;
2803
2804 ret = smbXcli_req_set_pending(reqs[i]);
2805 if (!ret) {
2806 return NT_STATUS_NO_MEMORY;
2807 }
2808 }
2809
2810 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
2811 _smb_setlen_tcp(state->length_hdr, nbt_len);
2812 iov[0].iov_base = state->length_hdr;
2813 iov[0].iov_len = sizeof(state->length_hdr);
2814
2815 if (state->conn->dispatch_incoming == NULL) {
2816 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
2817 }
2818
2819 subreq = writev_send(state, state->ev, state->conn->outgoing,
2820 state->conn->write_fd, false, iov, num_iov);
2821 if (subreq == NULL) {
2822 return NT_STATUS_NO_MEMORY;
2823 }
2824 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
2825 return NT_STATUS_OK;
2826 }
2827
2828 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
2829 {
2830 struct smbXcli_req_state *state =
2831 tevent_req_data(req,
2832 struct smbXcli_req_state);
2833
2834 state->smb2.credit_charge = charge;
2835 }
2836
2837 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
2838 struct tevent_context *ev,
2839 struct smbXcli_conn *conn,
2840 uint16_t cmd,
2841 uint32_t additional_flags,
2842 uint32_t clear_flags,
2843 uint32_t timeout_msec,
2844 struct smbXcli_tcon *tcon,
2845 struct smbXcli_session *session,
2846 const uint8_t *fixed,
2847 uint16_t fixed_len,
2848 const uint8_t *dyn,
2849 uint32_t dyn_len)
2850 {
2851 struct tevent_req *req;
2852 NTSTATUS status;
2853
2854 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
2855 additional_flags, clear_flags,
2856 timeout_msec,
2857 tcon, session,
2858 fixed, fixed_len, dyn, dyn_len);
2859 if (req == NULL) {
2860 return NULL;
2861 }
2862 if (!tevent_req_is_in_progress(req)) {
2863 return tevent_req_post(req, ev);
2864 }
2865 status = smb2cli_req_compound_submit(&req, 1);
2866 if (tevent_req_nterror(req, status)) {
2867 return tevent_req_post(req, ev);
2868 }
2869 return req;
2870 }
2871
2872 static void smb2cli_req_writev_done(struct tevent_req *subreq)
2873 {
2874 struct tevent_req *req =
2875 tevent_req_callback_data(subreq,
2876 struct tevent_req);
2877 struct smbXcli_req_state *state =
2878 tevent_req_data(req,
2879 struct smbXcli_req_state);
2880 ssize_t nwritten;
2881 int err;
2882
2883 nwritten = writev_recv(subreq, &err);
2884 TALLOC_FREE(subreq);
2885 if (nwritten == -1) {
2886 /* here, we need to notify all pending requests */
2887 NTSTATUS status = map_nt_error_from_unix_common(err);
2888 smbXcli_conn_disconnect(state->conn, status);
2889 return;
2890 }
2891 }
2892
2893 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
2894 uint8_t *buf,
2895 size_t buflen,
2896 TALLOC_CTX *mem_ctx,
2897 struct iovec **piov, int *pnum_iov)
2898 {
2899 struct iovec *iov;
2900 int num_iov = 0;
2901 size_t taken = 0;
2902 uint8_t *first_hdr = buf;
2903
2904 iov = talloc_array(mem_ctx, struct iovec, num_iov);
2905 if (iov == NULL) {
2906 return NT_STATUS_NO_MEMORY;
2907 }
2908
2909 while (taken < buflen) {
2910 uint8_t *tf = NULL;
2911 size_t tf_len = 0;
2912 size_t len = buflen - taken;
2913 uint8_t *hdr = first_hdr + taken;
2914 struct iovec *cur;
2915 size_t full_size;
2916 size_t next_command_ofs;
2917 uint16_t body_size;
2918 struct iovec *iov_tmp;
2919
2920 if (len < 4) {
2921 DEBUG(10, ("%d bytes left, expected at least %d\n",
2922 (int)len, 4));
2923 goto inval;
2924 }
2925 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
2926 struct smbXcli_session *s;
2927 uint64_t uid;
2928 struct iovec tf_iov[2];
2929 NTSTATUS status;
2930
2931 if (len < SMB2_TF_HDR_SIZE) {
2932 DEBUG(10, ("%d bytes left, expected at least %d\n",
2933 (int)len, SMB2_TF_HDR_SIZE));
2934 goto inval;
2935 }
2936 tf = hdr;
2937 tf_len = SMB2_TF_HDR_SIZE;
2938 taken += tf_len;
2939
2940 hdr = first_hdr + taken;
2941 len = IVAL(tf, SMB2_TF_MSG_SIZE);
2942 uid = BVAL(tf, SMB2_TF_SESSION_ID);
2943
2944 s = conn->sessions;
2945 for (; s; s = s->next) {
2946 if (s->smb2->session_id != uid) {
2947 continue;
2948 }
2949 break;
2950 }
2951
2952 if (s == NULL) {
2953 DEBUG(10, ("unknown session_id %llu\n",
2954 (unsigned long long)uid));
2955 goto inval;
2956 }
2957
2958 tf_iov[0].iov_base = (void *)tf;
2959 tf_iov[0].iov_len = tf_len;
2960 tf_iov[1].iov_base = (void *)hdr;
2961 tf_iov[1].iov_len = len;
2962
2963 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
2964 conn->protocol,
2965 tf_iov, 2);
2966 if (!NT_STATUS_IS_OK(status)) {
2967 TALLOC_FREE(iov);
2968 return status;
2969 }
2970 }
2971
2972 /*
2973 * We need the header plus the body length field
2974 */
2975
2976 if (len < SMB2_HDR_BODY + 2) {
2977 DEBUG(10, ("%d bytes left, expected at least %d\n",
2978 (int)len, SMB2_HDR_BODY));
2979 goto inval;
2980 }
2981 if (IVAL(hdr, 0) != SMB2_MAGIC) {
2982 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
2983 IVAL(hdr, 0)));
2984 goto inval;
2985 }
2986 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
2987 DEBUG(10, ("Got HDR len %d, expected %d\n",
2988 SVAL(hdr, 4), SMB2_HDR_BODY));
2989 goto inval;
2990 }
2991
2992 full_size = len;
2993 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
2994 body_size = SVAL(hdr, SMB2_HDR_BODY);
2995
2996 if (next_command_ofs != 0) {
2997 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
2998 goto inval;
2999 }
3000 if (next_command_ofs > full_size) {
3001 goto inval;
3002 }
3003 if (tf && next_command_ofs < len) {
3004 goto inval;
3005 }
3006 full_size = next_command_ofs;
3007 }
3008 if (body_size < 2) {
3009 goto inval;
3010 }
3011 body_size &= 0xfffe;
3012
3013 if (body_size > (full_size - SMB2_HDR_BODY)) {
3014 goto inval;
3015 }
3016
3017 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3018 num_iov + 4);
3019 if (iov_tmp == NULL) {
3020 TALLOC_FREE(iov);
3021 return NT_STATUS_NO_MEMORY;
3022 }
3023 iov = iov_tmp;
3024 cur = &iov[num_iov];
3025 num_iov += 4;
3026
3027 cur[0].iov_base = tf;
3028 cur[0].iov_len = tf_len;
3029 cur[1].iov_base = hdr;
3030 cur[1].iov_len = SMB2_HDR_BODY;
3031 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3032 cur[2].iov_len = body_size;
3033 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3034 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3035
3036 taken += full_size;
3037 }
3038
3039 *piov = iov;
3040 *pnum_iov = num_iov;
3041 return NT_STATUS_OK;
3042
3043 inval:
3044 TALLOC_FREE(iov);
3045 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3046 }
3047
3048 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3049 uint64_t mid)
3050 {
3051 size_t num_pending = talloc_array_length(conn->pending);
3052 size_t i;
3053
3054 for (i=0; i<num_pending; i++) {
3055 struct tevent_req *req = conn->pending[i];
3056 struct smbXcli_req_state *state =
3057 tevent_req_data(req,
3058 struct smbXcli_req_state);
3059
3060 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3061 return req;
3062 }
3063 }
3064 return NULL;
3065 }
3066
3067 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3068 TALLOC_CTX *tmp_mem,
3069 uint8_t *inbuf)
3070 {
3071 struct tevent_req *req;
3072 struct smbXcli_req_state *state = NULL;
3073 struct iovec *iov;
3074 int i, num_iov;
3075 NTSTATUS status;
3076 bool defer = true;
3077 struct smbXcli_session *last_session = NULL;
3078 size_t inbuf_len = smb_len_tcp(inbuf);
3079
3080 status = smb2cli_inbuf_parse_compound(conn,
3081 inbuf + NBT_HDR_SIZE,
3082 inbuf_len,
3083 tmp_mem,
3084 &iov, &num_iov);
3085 if (!NT_STATUS_IS_OK(status)) {
3086 return status;
3087 }
3088
3089 for (i=0; i<num_iov; i+=4) {
3090 uint8_t *inbuf_ref = NULL;
3091 struct iovec *cur = &iov[i];
3092 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3093 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3094 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3095 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3096 uint16_t req_opcode;
3097 uint32_t req_flags;
3098 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3099 uint32_t new_credits;
3100 struct smbXcli_session *session = NULL;
3101 const DATA_BLOB *signing_key = NULL;
3102
3103 new_credits = conn->smb2.cur_credits;
3104 new_credits += credits;
3105 if (new_credits > UINT16_MAX) {
3106 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3107 }
3108 conn->smb2.cur_credits += credits;
3109
3110 req = smb2cli_conn_find_pending(conn, mid);
3111 if (req == NULL) {
3112 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3113 }
3114 state = tevent_req_data(req, struct smbXcli_req_state);
3115
3116 state->smb2.got_async = false;
3117
3118 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3119 if (opcode != req_opcode) {
3120 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3121 }
3122 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3123
3124 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3125 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3126 }
3127
3128 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3129 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3130 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3131 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3132
3133 /*
3134 * async interim responses are not signed,
3135 * even if the SMB2_HDR_FLAG_SIGNED flag
3136 * is set.
3137 */
3138 req_flags |= SMB2_HDR_FLAG_ASYNC;
3139 SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
3140 SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
3141
3142 if (state->smb2.notify_async) {
3143 state->smb2.got_async = true;
3144 tevent_req_defer_callback(req, state->ev);
3145 tevent_req_notify_callback(req);
3146 }
3147 continue;
3148 }
3149
3150 session = state->session;
3151 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3152 session = last_session;
3153 }
3154 last_session = session;
3155
3156 if (state->smb2.should_sign) {
3157 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3158 return NT_STATUS_ACCESS_DENIED;
3159 }
3160 }
3161
3162 if (flags & SMB2_HDR_FLAG_SIGNED) {
3163 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3164
3165 if (session == NULL) {
3166 struct smbXcli_session *s;
3167
3168 s = state->conn->sessions;
3169 for (; s; s = s->next) {
3170 if (s->smb2->session_id != uid) {
3171 continue;
3172 }
3173
3174 session = s;
3175 break;
3176 }
3177 }
3178
3179 if (session == NULL) {
3180 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3181 }
3182
3183 last_session = session;
3184 signing_key = &session->smb2_channel.signing_key;
3185 }
3186
3187 if (opcode == SMB2_OP_SESSSETUP) {
3188 /*
3189 * We prefer the channel signing key, if it is
3190 * already there.
3191 *
3192 * If we do not have a channel signing key yet,
3193 * we try the main signing key, if it is not
3194 * the final response.
3195 */
3196 if (signing_key && signing_key->length == 0 &&
3197 !NT_STATUS_IS_OK(status)) {
3198 signing_key = &session->smb2->signing_key;
3199 }
3200
3201 if (signing_key && signing_key->length == 0) {
3202 /*
3203 * If we do not have a session key to
3204 * verify the signature, we defer the
3205 * signing check to the caller.
3206 *
3207 * The caller gets NT_STATUS_OK, it
3208 * has to call
3209 * smb2cli_session_set_session_key()
3210 * or
3211 * smb2cli_session_set_channel_key()
3212 * which will check the signature
3213 * with the channel signing key.
3214 */
3215 signing_key = NULL;
3216 }
3217 }
3218
3219 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3220 /*
3221 * if the server returns NT_STATUS_USER_SESSION_DELETED
3222 * the response is not signed and we should
3223 * propagate the NT_STATUS_USER_SESSION_DELETED
3224 * status to the caller.
3225 */
3226 signing_key = NULL;
3227 } else if (state->smb2.should_encrypt) {
3228 if (cur[0].iov_len != SMB2_TF_HDR_SIZE) {
3229 return NT_STATUS_ACCESS_DENIED;
3230 }
3231 }
3232
3233 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3234 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3235 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3236 /*
3237 * if the server returns
3238 * NT_STATUS_NETWORK_NAME_DELETED
3239 * NT_STATUS_FILE_CLOSED
3240 * NT_STATUS_INVALID_PARAMETER
3241 * the response might not be signed
3242 * as this happens before the signing checks.
3243 *
3244 * If server echos the signature (or all zeros)
3245 * we should report the status from the server
3246 * to the caller.
3247 */
3248 if (signing_key) {
3249 int cmp;
3250
3251 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3252 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3253 16);
3254 if (cmp == 0) {
3255 state->smb2.signing_skipped = true;
3256 signing_key = NULL;
3257 }
3258 }
3259 if (signing_key) {
3260 int cmp;
3261 static const uint8_t zeros[16];
3262
3263 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3264 zeros,
3265 16);
3266 if (cmp == 0) {
3267 state->smb2.signing_skipped = true;
3268 signing_key = NULL;
3269 }
3270 }
3271 }
3272
3273 if (signing_key) {
3274 status = smb2_signing_check_pdu(*signing_key,
3275 state->conn->protocol,
3276 &cur[1], 3);
3277 if (!NT_STATUS_IS_OK(status)) {
3278 /*
3279 * If the signing check fails, we disconnect
3280 * the connection.
3281 */
3282 return status;
3283 }
3284 }
3285
3286 smbXcli_req_unset_pending(req);
3287
3288 /*
3289 * There might be more than one response
3290 * we need to defer the notifications
3291 */
3292 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3293 defer = false;
3294 }
3295
3296 if (defer) {
3297 tevent_req_defer_callback(req, state->ev);
3298 }
3299
3300 /*
3301 * Note: here we use talloc_reference() in a way
3302 * that does not expose it to the caller.
3303 */
3304 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3305 if (tevent_req_nomem(inbuf_ref, req)) {
3306 continue;
3307 }
3308
3309 /* copy the related buffers */
3310 state->smb2.recv_iov[0] = cur[1];
3311 state->smb2.recv_iov[1] = cur[2];
3312 state->smb2.recv_iov[2] = cur[3];
3313
3314 tevent_req_done(req);
3315 }
3316
3317 if (defer) {
3318 return NT_STATUS_RETRY;
3319 }
3320
3321 return NT_STATUS_OK;
3322 }
3323
3324 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3325 struct iovec **piov,
3326 const struct smb2cli_req_expected_response *expected,
3327 size_t num_expected)
3328 {
3329 struct smbXcli_req_state *state =
3330 tevent_req_data(req,
3331 struct smbXcli_req_state);
3332 NTSTATUS status;
3333 size_t body_size;
3334 bool found_status = false;
3335 bool found_size = false;
3336 size_t i;
3337
3338 if (piov != NULL) {
3339 *piov = NULL;
3340 }
3341
3342 if (state->smb2.got_async) {
3343 return STATUS_PENDING;
3344 }
3345
3346 if (tevent_req_is_nterror(req, &status)) {
3347 for (i=0; i < num_expected; i++) {
3348 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3349 found_status = true;
3350 break;
3351 }
3352 }
3353
3354 if (found_status) {
3355 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3356 }
3357
3358 return status;
3359 }
3360
3361 if (num_expected == 0) {
3362 found_status = true;
3363 found_size = true;
3364 }
3365
3366 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3367 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3368
3369 for (i=0; i < num_expected; i++) {
3370 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3371 continue;
3372 }
3373
3374 found_status = true;
3375 if (expected[i].body_size == 0) {
3376 found_size = true;
3377 break;
3378 }
3379
3380 if (expected[i].body_size == body_size) {
3381 found_size = true;
3382 break;
3383 }
3384 }
3385
3386 if (!found_status) {
3387 return status;
3388 }
3389
3390 if (state->smb2.signing_skipped) {
3391 if (num_expected > 0) {
3392 return NT_STATUS_ACCESS_DENIED;
3393 }
3394 if (!NT_STATUS_IS_ERR(status)) {
3395 return NT_STATUS_ACCESS_DENIED;
3396 }
3397 }
3398
3399 if (!found_size) {
3400 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3401 }
3402
3403 if (piov != NULL) {
3404 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3405 }
3406
3407 return status;
3408 }
3409
3410 static const struct {
3411 enum protocol_types proto;
3412 const char *smb1_name;
3413 } smb1cli_prots[] = {
3414 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
3415 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
3416 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
3417 {PROTOCOL_LANMAN1, "LANMAN1.0"},
3418 {PROTOCOL_LANMAN2, "LM1.2X002"},
3419 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
3420 {PROTOCOL_LANMAN2, "LANMAN2.1"},
3421 {PROTOCOL_LANMAN2, "Samba"},
3422 {PROTOCOL_NT1, "NT LANMAN 1.0"},
3423 {PROTOCOL_NT1, "NT LM 0.12"},
3424 {PROTOCOL_SMB2_02, "SMB 2.002"},
3425 {PROTOCOL_SMB2_10, "SMB 2.???"},
3426 };
3427
3428 static const struct {
3429 enum protocol_types proto;
3430 uint16_t smb2_dialect;
3431 } smb2cli_prots[] = {
3432 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
3433 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
3434 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
3435 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
3436 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
3437 };
3438
3439 struct smbXcli_negprot_state {
3440 struct smbXcli_conn *conn;
3441 struct tevent_context *ev;
3442 uint32_t timeout_msec;
3443 enum protocol_types min_protocol;
3444 enum protocol_types max_protocol;
3445
3446 struct {
3447 uint8_t fixed[36];
3448 uint8_t dyn[ARRAY_SIZE(smb2cli_prots)*2];
3449 } smb2;
3450 };
3451
3452 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3453 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3454 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3455 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3456 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3457 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3458 TALLOC_CTX *frame,
3459 uint8_t *inbuf);
3460
3461 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3462 struct tevent_context *ev,
3463 struct smbXcli_conn *conn,
3464 uint32_t timeout_msec,
3465 enum protocol_types min_protocol,
3466 enum protocol_types max_protocol)
3467 {
3468 struct tevent_req *req, *subreq;
3469 struct smbXcli_negprot_state *state;
3470
3471 req = tevent_req_create(mem_ctx, &state,
3472 struct smbXcli_negprot_state);
3473 if (req == NULL) {
3474 return NULL;
3475 }
3476 state->conn = conn;
3477 state->ev = ev;
3478 state->timeout_msec = timeout_msec;
3479 state->min_protocol = min_protocol;
3480 state->max_protocol = max_protocol;
3481
3482 if (min_protocol == PROTOCOL_NONE) {
3483 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3484 return tevent_req_post(req, ev);
3485 }
3486
3487 if (max_protocol == PROTOCOL_NONE) {
3488 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3489 return tevent_req_post(req, ev);
3490 }
3491
3492 if (min_protocol > max_protocol) {
3493 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3494 return tevent_req_post(req, ev);
3495 }
3496
3497 if ((min_protocol < PROTOCOL_SMB2_02) &&
3498 (max_protocol < PROTOCOL_SMB2_02)) {
3499 /*
3500 * SMB1 only...
3501 */
3502 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3503
3504 subreq = smbXcli_negprot_smb1_subreq(state);
3505 if (tevent_req_nomem(subreq, req)) {
3506 return tevent_req_post(req, ev);
3507 }
3508 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3509 return req;
3510 }
3511
3512 if ((min_protocol >= PROTOCOL_SMB2_02) &&
3513 (max_protocol >= PROTOCOL_SMB2_02)) {
3514 /*
3515 * SMB2 only...
3516 */
3517 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3518
3519 subreq = smbXcli_negprot_smb2_subreq(state);
3520 if (tevent_req_nomem(subreq, req)) {
3521 return tevent_req_post(req, ev);
3522 }
3523 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3524 return req;
3525 }
3526
3527 /*
3528 * We send an SMB1 negprot with the SMB2 dialects
3529 * and expect a SMB1 or a SMB2 response.
3530 *
3531 * smbXcli_negprot_dispatch_incoming() will fix the
3532 * callback to match protocol of the response.
3533 */
3534 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
3535
3536 subreq = smbXcli_negprot_smb1_subreq(state);
3537 if (tevent_req_nomem(subreq, req)) {
3538 return tevent_req_post(req, ev);
3539 }
3540 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
3541 return req;
3542 }
3543
3544 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
3545 {
3546 struct tevent_req *req =
3547 tevent_req_callback_data(subreq,
3548 struct tevent_req);
3549 NTSTATUS status;
3550
3551 /*
3552 * we just want the low level error
3553 */
3554 status = tevent_req_simple_recv_ntstatus(subreq);
3555 TALLOC_FREE(subreq);
3556 if (tevent_req_nterror(req, status)) {
3557 return;
3558 }
3559
3560 /* this should never happen */
3561 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
3562 }
3563
3564 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
3565 {
3566 size_t i;
3567 DATA_BLOB bytes = data_blob_null;
3568 uint8_t flags;
3569 uint16_t flags2;
3570
3571 /* setup the protocol strings */
3572 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3573 uint8_t c = 2;
3574 bool ok;
3575
3576 if (smb1cli_prots[i].proto < state->min_protocol) {
3577 continue;
3578 }
3579
3580 if (smb1cli_prots[i].proto > state->max_protocol) {
3581 continue;
3582 }
3583
3584 ok = data_blob_append(state, &bytes, &c, sizeof(c));
3585 if (!ok) {
3586 return NULL;
3587 }
3588
3589 /*
3590 * We now it is already ascii and
3591 * we want NULL termination.
3592 */
3593 ok = data_blob_append(state, &bytes,
3594 smb1cli_prots[i].smb1_name,
3595 strlen(smb1cli_prots[i].smb1_name)+1);
3596 if (!ok) {
3597 return NULL;
3598 }
3599 }
3600
3601 smb1cli_req_flags(state->max_protocol,
3602 state->conn->smb1.client.capabilities,
3603 SMBnegprot,
3604 0, 0, &flags,
3605 0, 0, &flags2);
3606
3607 return smb1cli_req_send(state, state->ev, state->conn,
3608 SMBnegprot,
3609 flags, ~flags,
3610 flags2, ~flags2,
3611 state->timeout_msec,
3612 0xFFFE, 0, NULL, /* pid, tid, session */
3613 0, NULL, /* wct, vwv */
3614 bytes.length, bytes.data);
3615 }
3616
3617 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
3618 {
3619 struct tevent_req *req =
3620 tevent_req_callback_data(subreq,
3621 struct tevent_req);
3622 struct smbXcli_negprot_state *state =
3623 tevent_req_data(req,
3624 struct smbXcli_negprot_state);
3625 struct smbXcli_conn *conn = state->conn;
3626 struct iovec *recv_iov = NULL;
3627 uint8_t *inhdr;
3628 uint8_t wct;
3629 uint16_t *vwv;
3630 uint32_t num_bytes;
3631 uint8_t *bytes;
3632 NTSTATUS status;
3633 uint16_t protnum;
3634 size_t i;
3635 size_t num_prots = 0;
3636 uint8_t flags;
3637 uint32_t client_capabilities = conn->smb1.client.capabilities;
3638 uint32_t both_capabilities;
3639 uint32_t server_capabilities = 0;
3640 uint32_t capabilities;
3641 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
3642 uint32_t server_max_xmit = 0;
3643 uint32_t max_xmit;
3644 uint32_t server_max_mux = 0;
3645 uint16_t server_security_mode = 0;
3646 uint32_t server_session_key = 0;
3647 bool server_readbraw = false;
3648 bool server_writebraw = false;
3649 bool server_lockread = false;
3650 bool server_writeunlock = false;
3651 struct GUID server_guid = GUID_zero();
3652 DATA_BLOB server_gss_blob = data_blob_null;
3653 uint8_t server_challenge[8];
3654 char *server_workgroup = NULL;
3655 char *server_name = NULL;
3656 int server_time_zone = 0;
3657 NTTIME server_system_time = 0;
3658 static const struct smb1cli_req_expected_response expected[] = {
3659 {
3660 .status = NT_STATUS_OK,
3661 .wct = 0x11, /* NT1 */
3662 },
3663 {
3664 .status = NT_STATUS_OK,
3665 .wct = 0x0D, /* LM */
3666 },
3667 {
3668 .status = NT_STATUS_OK,
3669 .wct = 0x01, /* CORE */
3670 }
3671 };
3672
3673 ZERO_STRUCT(server_challenge);
3674
3675 status = smb1cli_req_recv(subreq, state,
3676 &recv_iov,
3677 &inhdr,
3678 &wct,
3679 &vwv,
3680 NULL, /* pvwv_offset */
3681 &num_bytes,
3682 &bytes,
3683 NULL, /* pbytes_offset */
3684 NULL, /* pinbuf */
3685 expected, ARRAY_SIZE(expected));
3686 TALLOC_FREE(subreq);
3687 if (tevent_req_nterror(req, status)) {
3688 return;
3689 }
3690
3691 flags = CVAL(inhdr, HDR_FLG);
3692
3693 protnum = SVAL(vwv, 0);
3694
3695 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3696 if (smb1cli_prots[i].proto < state->min_protocol) {
3697 continue;
3698 }
3699
3700 if (smb1cli_prots[i].proto > state->max_protocol) {
3701 continue;
3702 }
3703
3704 if (protnum != num_prots) {
3705 num_prots++;
3706 continue;
3707 }
3708
3709 conn->protocol = smb1cli_prots[i].proto;
3710 break;
3711 }
3712
3713 if (conn->protocol == PROTOCOL_NONE) {
3714 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3715 return;
3716 }
3717
3718 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
3719 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
3720 "and the selected protocol level doesn't support it.\n"));
3721 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3722 return;
3723 }
3724
3725 if (flags & FLAG_SUPPORT_LOCKREAD) {
3726 server_lockread = true;
3727 server_writeunlock = true;
3728 }
3729
3730 if (conn->protocol >= PROTOCOL_NT1) {
3731 const char *client_signing = NULL;
3732 bool server_mandatory = false;
3733 bool server_allowed = false;
3734 const char *server_signing = NULL;
3735 bool ok;
3736 uint8_t key_len;
3737
3738 if (wct != 0x11) {
3739 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3740 return;
3741 }
3742
3743 /* NT protocol */
3744 server_security_mode = CVAL(vwv + 1, 0);
3745 server_max_mux = SVAL(vwv + 1, 1);
3746 server_max_xmit = IVAL(vwv + 3, 1);
3747 server_session_key = IVAL(vwv + 7, 1);
3748 server_time_zone = SVALS(vwv + 15, 1);
3749 server_time_zone *= 60;
3750 /* this time arrives in real GMT */
3751 server_system_time = BVAL(vwv + 11, 1);
3752 server_capabilities = IVAL(vwv + 9, 1);
3753
3754 key_len = CVAL(vwv + 16, 1);
3755
3756 if (server_capabilities & CAP_RAW_MODE) {
3757 server_readbraw = true;
3758 server_writebraw = true;
3759 }
3760 if (server_capabilities & CAP_LOCK_AND_READ) {
3761 server_lockread = true;
3762 }
3763
3764 if (server_capabilities & CAP_EXTENDED_SECURITY) {
3765 DATA_BLOB blob1, blob2;
3766
3767 if (num_bytes < 16) {
3768 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3769 return;
3770 }
3771
3772 blob1 = data_blob_const(bytes, 16);
3773 status = GUID_from_data_blob(&blob1, &server_guid);
3774 if (tevent_req_nterror(req, status)) {
3775 return;
3776 }
3777
3778 blob1 = data_blob_const(bytes+16, num_bytes-16);
3779 blob2 = data_blob_dup_talloc(state, blob1);
3780 if (blob1.length > 0 &&
3781 tevent_req_nomem(blob2.data, req)) {
3782 return;
3783 }
3784 server_gss_blob = blob2;
3785 } else {
3786 DATA_BLOB blob1, blob2;
3787
3788 if (num_bytes < key_len) {
3789 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3790 return;
3791 }
3792
3793 if (key_len != 0 && key_len != 8) {
3794 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3795 return;
3796 }
3797
3798 if (key_len == 8) {
3799 memcpy(server_challenge, bytes, 8);
3800 }
3801
3802 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
3803 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
3804 if (blob1.length > 0) {
3805 size_t len;
3806
3807 len = utf16_len_n(blob1.data,
3808 blob1.length);
3809 blob1.length = len;
3810
3811 ok = convert_string_talloc(state,
3812 CH_UTF16LE,
3813 CH_UNIX,
3814 blob1.data,
3815 blob1.length,
3816 &server_workgroup,
3817 &len);
3818 if (!ok) {
3819 status = map_nt_error_from_unix_common(errno);
3820 tevent_req_nterror(req, status);
3821 return;
3822 }
3823 }
3824
3825 blob2.data += blob1.length;
3826 blob2.length -= blob1.length;
3827 if (blob2.length > 0) {
3828 size_t len;
3829
3830 len = utf16_len_n(blob1.data,
3831 blob1.length);
3832 blob1.length = len;
3833
3834 ok = convert_string_talloc(state,
3835 CH_UTF16LE,
3836 CH_UNIX,
3837 blob2.data,
3838 blob2.length,
3839 &server_name,
3840 &len);
3841 if (!ok) {
3842 status = map_nt_error_from_unix_common(errno);
3843 tevent_req_nterror(req, status);
3844 return;
3845 }
3846 }
3847 }
3848
3849 client_signing = "disabled";
3850 if (conn->allow_signing) {
3851 client_signing = "allowed";
3852 }
3853 if (conn->mandatory_signing) {
3854 client_signing = "required";
3855 }
3856
3857 server_signing = "not supported";
3858 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
3859 server_signing = "supported";
3860 server_allowed = true;
3861 }
3862 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
3863 server_signing = "required";
3864 server_mandatory = true;
3865 }
3866
3867 ok = smb_signing_set_negotiated(conn->smb1.signing,
3868 server_allowed,
3869 server_mandatory);
3870 if (!ok) {
3871 DEBUG(1,("cli_negprot: SMB signing is required, "
3872 "but client[%s] and server[%s] mismatch\n",
3873 client_signing, server_signing));
3874 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3875 return;
3876 }
3877
3878 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
3879 DATA_BLOB blob1;
3880 uint8_t key_len;
3881 time_t t;
3882
3883 if (wct != 0x0D) {
3884 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3885 return;
3886 }
3887
3888 server_security_mode = SVAL(vwv + 1, 0);
3889 server_max_xmit = SVAL(vwv + 2, 0);
3890 server_max_mux = SVAL(vwv + 3, 0);
3891 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
3892 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
3893 server_session_key = IVAL(vwv + 6, 0);
3894 server_time_zone = SVALS(vwv + 10, 0);
3895 server_time_zone *= 60;
3896 /* this time is converted to GMT by make_unix_date */
3897 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
3898 unix_to_nt_time(&server_system_time, t);
3899 key_len = SVAL(vwv + 11, 0);
3900
3901 if (num_bytes < key_len) {
3902 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3903 return;
3904 }
3905
3906 if (key_len != 0 && key_len != 8) {
3907 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3908 return;
3909 }
3910
3911 if (key_len == 8) {
3912 memcpy(server_challenge, bytes, 8);
3913 }
3914
3915 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
3916 if (blob1.length > 0) {
3917 size_t len;
3918 bool ok;
3919
3920 len = utf16_len_n(blob1.data,
3921 blob1.length);
3922 blob1.length = len;
3923
3924 ok = convert_string_talloc(state,
3925 CH_DOS,
3926 CH_UNIX,
3927 blob1.data,
3928 blob1.length,
3929 &server_workgroup,
3930 &len);
3931 if (!ok) {
3932 status = map_nt_error_from_unix_common(errno);
3933 tevent_req_nterror(req, status);
3934 return;
3935 }
3936 }
3937
3938 } else {
3939 /* the old core protocol */
3940 server_time_zone = get_time_zone(time(NULL));
3941 server_max_xmit = 1024;
3942 server_max_mux = 1;
3943 }
3944
3945 if (server_max_xmit < 1024) {
3946 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3947 return;
3948 }
3949
3950 if (server_max_mux < 1) {
3951 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3952 return;
3953 }
3954
3955 /*
3956 * Now calculate the negotiated capabilities
3957 * based on the mask for:
3958 * - client only flags
3959 * - flags used in both directions
3960 * - server only flags
3961 */
3962 both_capabilities = client_capabilities & server_capabilities;
3963 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
3964 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
3965 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
3966
3967 max_xmit = MIN(client_max_xmit, server_max_xmit);
3968
3969 conn->smb1.server.capabilities = server_capabilities;
3970 conn->smb1.capabilities = capabilities;
3971
3972 conn->smb1.server.max_xmit = server_max_xmit;
3973 conn->smb1.max_xmit = max_xmit;
3974
3975 conn->smb1.server.max_mux = server_max_mux;
3976
3977 conn->smb1.server.security_mode = server_security_mode;
3978
3979 conn->smb1.server.readbraw = server_readbraw;
3980 conn->smb1.server.writebraw = server_writebraw;
3981 conn->smb1.server.lockread = server_lockread;
3982 conn->smb1.server.writeunlock = server_writeunlock;
3983
3984 conn->smb1.server.session_key = server_session_key;
3985
3986 talloc_steal(conn, server_gss_blob.data);
3987 conn->smb1.server.gss_blob = server_gss_blob;
3988 conn->smb1.server.guid = server_guid;
3989 memcpy(conn->smb1.server.challenge, server_challenge, 8);
3990 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
3991 conn->smb1.server.name = talloc_move(conn, &server_name);
3992
3993 conn->smb1.server.time_zone = server_time_zone;
3994 conn->smb1.server.system_time = server_system_time;
3995
3996 tevent_req_done(req);
3997 }
3998
3999 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4000 {
4001 size_t i;
4002 uint8_t *buf;
4003 uint16_t dialect_count = 0;
4004
4005 buf = state->smb2.dyn;
4006 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4007 if (smb2cli_prots[i].proto < state->min_protocol) {
4008 continue;
4009 }
4010
4011 if (smb2cli_prots[i].proto > state->max_protocol) {
4012 continue;
4013 }
4014
4015 SSVAL(buf, dialect_count*2, smb2cli_prots[i].smb2_dialect);
4016 dialect_count++;
4017 }
4018
4019 buf = state->smb2.fixed;
4020 SSVAL(buf, 0, 36);
4021 SSVAL(buf, 2, dialect_count);
4022 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4023 SSVAL(buf, 6, 0); /* Reserved */
4024 if (state->max_protocol >= PROTOCOL_SMB2_22) {
4025 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4026 } else {
4027 SIVAL(buf, 8, 0); /* Capabilities */
4028 }
4029 if (state->max_protocol >= PROTOCOL_SMB2_10) {
4030 NTSTATUS status;
4031 DATA_BLOB blob;
4032
4033 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4034 state, &blob);
4035 if (!NT_STATUS_IS_OK(status)) {
4036 return NULL;
4037 }
4038 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4039 } else {
4040 memset(buf+12, 0, 16); /* ClientGuid */
4041 }
4042 SBVAL(buf, 28, 0); /* ClientStartTime */
4043
4044 return smb2cli_req_send(state, state->ev,
4045 state->conn, SMB2_OP_NEGPROT,
4046 0, 0, /* flags */
4047 state->timeout_msec,
4048 NULL, NULL, /* tcon, session */
4049 state->smb2.fixed, sizeof(state->smb2.fixed),
4050 state->smb2.dyn, dialect_count*2);
4051 }
4052
4053 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4054 {
4055 struct tevent_req *req =
4056 tevent_req_callback_data(subreq,
4057 struct tevent_req);
4058 struct smbXcli_negprot_state *state =
4059 tevent_req_data(req,
4060 struct smbXcli_negprot_state);
4061 struct smbXcli_conn *conn = state->conn;
4062 size_t security_offset, security_length;
4063 DATA_BLOB blob;
4064 NTSTATUS status;
4065 struct iovec *iov;
4066 uint8_t *body;
4067 size_t i;
4068 uint16_t dialect_revision;
4069 static const struct smb2cli_req_expected_response expected[] = {
4070 {
4071 .status = NT_STATUS_OK,
4072 .body_size = 0x41
4073 }
4074 };
4075
4076 status = smb2cli_req_recv(subreq, state, &iov,
4077 expected, ARRAY_SIZE(expected));
4078 TALLOC_FREE(subreq);
4079 if (tevent_req_nterror(req, status)) {
4080 return;
4081 }
4082
4083 body = (uint8_t *)iov[1].iov_base;
4084
4085 dialect_revision = SVAL(body, 4);
4086
4087 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4088 if (smb2cli_prots[i].proto < state->min_protocol) {
4089 continue;
4090 }
4091
4092 if (smb2cli_prots[i].proto > state->max_protocol) {
4093 continue;
4094 }
4095
4096 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4097 continue;
4098 }
4099
4100 conn->protocol = smb2cli_prots[i].proto;
4101 break;
4102 }
4103
4104 if (conn->protocol == PROTOCOL_NONE) {
4105 if (state->min_protocol >= PROTOCOL_SMB2_02) {
4106 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4107 return;
4108 }
4109
4110 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4111 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4112 return;
4113 }
4114
4115 /* make sure we do not loop forever */
4116 state->min_protocol = PROTOCOL_SMB2_02;
4117
4118 /*
4119 * send a SMB2 negprot, in order to negotiate
4120 * the SMB2 dialect.
4121 */
4122 subreq = smbXcli_negprot_smb2_subreq(state);
4123 if (tevent_req_nomem(subreq, req)) {
4124 return;
4125 }
4126 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4127 return;
4128 }
4129
4130 conn->smb2.server.security_mode = SVAL(body, 2);
4131
4132 blob = data_blob_const(body + 8, 16);
4133 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4134 if (tevent_req_nterror(req, status)) {
4135 return;
4136 }
4137
4138 conn->smb2.server.capabilities = IVAL(body, 24);
4139 conn->smb2.server.max_trans_size= IVAL(body, 28);
4140 conn->smb2.server.max_read_size = IVAL(body, 32);
4141 conn->smb2.server.max_write_size= IVAL(body, 36);
4142 conn->smb2.server.system_time = BVAL(body, 40);
4143 conn->smb2.server.start_time = BVAL(body, 48);
4144
4145 security_offset = SVAL(body, 56);
4146 security_length = SVAL(body, 58);
4147
4148 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4149 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4150 return;
4151 }
4152
4153 if (security_length > iov[2].iov_len) {
4154 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4155 return;
4156 }
4157
4158 conn->smb2.server.gss_blob = data_blob_talloc(conn,
4159 iov[2].iov_base,
4160 security_length);
4161 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4162 return;
4163 }
4164
4165 tevent_req_done(req);
4166 }
4167
4168 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4169 TALLOC_CTX *tmp_mem,
4170 uint8_t *inbuf)
4171 {
4172 size_t num_pending = talloc_array_length(conn->pending);
4173 struct tevent_req *subreq;
4174 struct smbXcli_req_state *substate;
4175 struct tevent_req *req;
4176 uint32_t protocol_magic;
4177 size_t inbuf_len = smb_len_nbt(inbuf);
4178
4179 if (num_pending != 1) {
4180 return NT_STATUS_INTERNAL_ERROR;
4181 }
4182
4183 if (inbuf_len < 4) {
4184 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4185 }
4186
4187 subreq = conn->pending[0];
4188 substate = tevent_req_data(subreq, struct smbXcli_req_state);
4189 req = tevent_req_callback_data(subreq, struct tevent_req);
4190
4191 protocol_magic = IVAL(inbuf, 4);
4192
4193 switch (protocol_magic) {
4194 case SMB_MAGIC:
4195 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4196 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4197 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4198
4199 case SMB2_MAGIC:
4200 if (substate->smb2.recv_iov == NULL) {
4201 /*
4202 * For the SMB1 negprot we have move it.
4203 */
4204 substate->smb2.recv_iov = substate->smb1.recv_iov;
4205 substate->smb1.recv_iov = NULL;
4206 }
4207
4208 /*
4209 * we got an SMB2 answer, which consumed sequence number 0
4210 * so we need to use 1 as the next one
4211 */
4212 conn->smb2.mid = 1;
4213 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4214 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4215 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4216 }
4217
4218 DEBUG(10, ("Got non-SMB PDU\n"));
4219 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4220 }
4221
4222 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
4223 {
4224 return tevent_req_simple_recv_ntstatus(req);
4225 }
4226
4227 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
4228 uint32_t timeout_msec,
4229 enum protocol_types min_protocol,
4230 enum protocol_types max_protocol)
4231 {
4232 TALLOC_CTX *frame = talloc_stackframe();
4233 struct tevent_context *ev;
4234 struct tevent_req *req;
4235 NTSTATUS status = NT_STATUS_NO_MEMORY;
4236 bool ok;
4237
4238 if (smbXcli_conn_has_async_calls(conn)) {
4239 /*
4240 * Can't use sync call while an async call is in flight
4241 */
4242 status = NT_STATUS_INVALID_PARAMETER_MIX;
4243 goto fail;
4244 }
4245 ev = tevent_context_init(frame);
4246 if (ev == NULL) {
4247 goto fail;
4248 }
4249 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
4250 min_protocol, max_protocol);
4251 if (req == NULL) {
4252 goto fail;
4253 }
4254 ok = tevent_req_poll(req, ev);
4255 if (!ok) {
4256 status = map_nt_error_from_unix_common(errno);
4257 goto fail;
4258 }
4259 status = smbXcli_negprot_recv(req);
4260 fail:
4261 TALLOC_FREE(frame);
4262 return status;
4263 }
4264
4265 static int smbXcli_session_destructor(struct smbXcli_session *session)
4266 {
4267 if (session->conn == NULL) {
4268 return 0;
4269 }
4270
4271 DLIST_REMOVE(session->conn->sessions, session);
4272 return 0;
4273 }
4274
4275 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
4276 struct smbXcli_conn *conn)
4277 {
4278 struct smbXcli_session *session;
4279
4280 session = talloc_zero(mem_ctx, struct smbXcli_session);
4281 if (session == NULL) {
4282 return NULL;
4283 }
4284 session->smb2 = talloc_zero(session, struct smb2cli_session);
4285 if (session->smb2 == NULL) {
4286 talloc_free(session);
4287 return NULL;
4288 }
4289 talloc_set_destructor(session, smbXcli_session_destructor);
4290
4291 DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
4292 session->conn = conn;
4293
4294 return session;
4295 }
4296
4297 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
4298 {
4299 return session->smb1.session_id;
4300 }
4301
4302 void smb1cli_session_set_id(struct smbXcli_session *session,
4303 uint16_t session_id)
4304 {
4305 session->smb1.session_id = session_id;
4306 data_blob_clear_free(&session->smb1.application_key);
4307 }
4308
4309 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
4310 const DATA_BLOB _session_key)
4311 {
4312 struct smbXcli_conn *conn = session->conn;
4313 uint8_t session_key[16];
4314
4315 if (conn == NULL) {
4316 return NT_STATUS_INVALID_PARAMETER_MIX;
4317 }
4318
4319 if (session->smb1.application_key.length != 0) {
4320 return NT_STATUS_INVALID_PARAMETER_MIX;
4321 }
4322
4323 if (_session_key.length == 0) {
4324 return NT_STATUS_OK;
4325 }
4326
4327 ZERO_STRUCT(session_key);
4328 memcpy(session_key, _session_key.data,
4329 MIN(_session_key.length, sizeof(session_key)));
4330
4331 session->smb1.application_key = data_blob_talloc(session,
4332 session_key,
4333 sizeof(session_key));
4334 ZERO_STRUCT(session_key);
4335 if (session->smb1.application_key.data == NULL) {
4336 return NT_STATUS_NO_MEMORY;
4337 }
4338
4339 return NT_STATUS_OK;
4340 }
4341
4342 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
4343 {
4344 struct smbXcli_conn *conn = session->conn;
4345 uint8_t security_mode = 0;
4346
4347 if (conn == NULL) {
4348 return security_mode;
4349 }
4350
4351 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
4352 if (conn->mandatory_signing) {
4353 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
4354 }
4355
4356 return security_mode;
4357 }
4358
4359 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
4360 {
4361 return session->smb2->session_id;
4362 }
4363
4364 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
4365 {
4366 return session->smb2->session_flags;
4367 }
4368
4369 NTSTATUS smb2cli_session_application_key(struct smbXcli_session *session,
4370 TALLOC_CTX *mem_ctx,
4371 DATA_BLOB *key)
4372 {
4373 *key = data_blob_null;
4374
4375 if (session->smb2->application_key.length == 0) {
4376 return NT_STATUS_NO_USER_SESSION_KEY;
4377 }
4378
4379 *key = data_blob_dup_talloc(mem_ctx, session->smb2->application_key);
4380 if (key->data == NULL) {
4381 return NT_STATUS_NO_MEMORY;
4382 }
4383
4384 return NT_STATUS_OK;
4385 }
4386
4387 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
4388 uint64_t session_id,
4389 uint16_t session_flags)
4390 {
4391 session->smb2->session_id = session_id;
4392 session->smb2->session_flags = session_flags;
4393 }
4394
4395 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
4396 {
4397 session->smb2->channel_sequence += 1;
4398 }
4399
4400 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
4401 const DATA_BLOB _session_key,
4402 const struct iovec *recv_iov)
4403 {
4404 struct smbXcli_conn *conn = session->conn;
4405 uint16_t no_sign_flags;
4406 uint8_t session_key[16];
4407 NTSTATUS status;
4408
4409 if (conn == NULL) {
4410 return NT_STATUS_INVALID_PARAMETER_MIX;
4411 }
4412
4413 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
4414
4415 if (session->smb2->session_flags & no_sign_flags) {
4416 session->smb2->should_sign = false;
4417 return NT_STATUS_OK;
4418 }
4419
4420 if (session->smb2->signing_key.length != 0) {
4421 return NT_STATUS_INVALID_PARAMETER_MIX;
4422 }
4423
4424 ZERO_STRUCT(session_key);
4425 memcpy(session_key, _session_key.data,
4426 MIN(_session_key.length, sizeof(session_key)));
4427
4428 session->smb2->signing_key = data_blob_talloc(session,
4429 session_key,
4430 sizeof(session_key));
4431 if (session->smb2->signing_key.data == NULL) {
4432 ZERO_STRUCT(session_key);
4433 return NT_STATUS_NO_MEMORY;
4434 }
4435
4436 if (conn->protocol >= PROTOCOL_SMB2_24) {
4437 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4438 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4439
4440 smb2_key_derivation(session_key, sizeof(session_key),
4441 label.data, label.length,
4442 context.data, context.length,
4443 session->smb2->signing_key.data);
4444 }
4445
4446 session->smb2->encryption_key = data_blob_dup_talloc(session,
4447 session->smb2->signing_key);
4448 if (session->smb2->encryption_key.data == NULL) {
4449 ZERO_STRUCT(session_key);
4450 return NT_STATUS_NO_MEMORY;
4451 }
4452
4453 if (conn->protocol >= PROTOCOL_SMB2_24) {
4454 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4455 const DATA_BLOB context = data_blob_string_const_null("ServerIn ");
4456
4457 smb2_key_derivation(session_key, sizeof(session_key),
4458 label.data, label.length,
4459 context.data, context.length,
4460 session->smb2->encryption_key.data);
4461 }
4462
4463 session->smb2->decryption_key = data_blob_dup_talloc(session,
4464 session->smb2->signing_key);
4465 if (session->smb2->decryption_key.data == NULL) {
4466 ZERO_STRUCT(session_key);
4467 return NT_STATUS_NO_MEMORY;
4468 }
4469
4470 if (conn->protocol >= PROTOCOL_SMB2_24) {
4471 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4472 const DATA_BLOB context = data_blob_string_const_null("ServerOut");
4473
4474 smb2_key_derivation(session_key, sizeof(session_key),
4475 label.data, label.length,
4476 context.data, context.length,
4477 session->smb2->decryption_key.data);
4478 }
4479
4480 session->smb2->application_key = data_blob_dup_talloc(session,
4481 session->smb2->signing_key);
4482 if (session->smb2->application_key.data == NULL) {
4483 ZERO_STRUCT(session_key);
4484 return NT_STATUS_NO_MEMORY;
4485 }
4486
4487 if (conn->protocol >= PROTOCOL_SMB2_24) {
4488 const DATA_BLOB label = data_blob_string_const_null("SMB2APP");
4489 const DATA_BLOB context = data_blob_string_const_null("SmbRpc");
4490
4491 smb2_key_derivation(session_key, sizeof(session_key),
4492 label.data, label.length,
4493 context.data, context.length,
4494 session->smb2->application_key.data);
4495 }
4496 ZERO_STRUCT(session_key);
4497
4498 session->smb2_channel.signing_key = data_blob_dup_talloc(session,
4499 session->smb2->signing_key);
4500 if (session->smb2_channel.signing_key.data == NULL) {
4501 return NT_STATUS_NO_MEMORY;
4502 }
4503
4504 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4505 session->conn->protocol,
4506 recv_iov, 3);
4507 if (!NT_STATUS_IS_OK(status)) {
4508 return status;
4509 }
4510
4511 session->smb2->should_sign = false;
4512 session->smb2->should_encrypt = false;
4513
4514 if (conn->desire_signing) {
4515 session->smb2->should_sign = true;
4516 }
4517
4518 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
4519 session->smb2->should_sign = true;
4520 }
4521
4522 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
4523 session->smb2->should_encrypt = true;
4524 }
4525
4526 if (conn->protocol < PROTOCOL_SMB2_24) {
4527 session->smb2->should_encrypt = false;
4528 }
4529
4530 if (!(conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
4531 session->smb2->should_encrypt = false;
4532 }
4533
4534 generate_random_buffer((uint8_t *)&session->smb2->nonce_high,
4535 sizeof(session->smb2->nonce_high));
4536 session->smb2->nonce_low = 1;
4537
4538 return NT_STATUS_OK;
4539 }
4540
4541 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
4542 struct smbXcli_session *session1,
4543 struct smbXcli_conn *conn,
4544 struct smbXcli_session **_session2)
4545 {
4546 struct smbXcli_session *session2;
4547
4548 if (session1->smb2->signing_key.length == 0) {
4549 return NT_STATUS_INVALID_PARAMETER_MIX;
4550 }
4551
4552 if (conn == NULL) {
4553 return NT_STATUS_INVALID_PARAMETER_MIX;
4554 }
4555
4556 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
4557 if (session2 == NULL) {
4558 return NT_STATUS_NO_MEMORY;
4559 }
4560 session2->smb2 = talloc_reference(session2, session1->smb2);
4561 if (session2->smb2 == NULL) {
4562 talloc_free(session2);
4563 return NT_STATUS_NO_MEMORY;
4564 }
4565
4566 talloc_set_destructor(session2, smbXcli_session_destructor);
4567 DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
4568 session2->conn = conn;
4569
4570 *_session2 = session2;
4571 return NT_STATUS_OK;
4572 }
4573
4574 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
4575 const DATA_BLOB _channel_key,
4576 const struct iovec *recv_iov)
4577 {
4578 struct smbXcli_conn *conn = session->conn;
4579 uint8_t channel_key[16];
4580 NTSTATUS status;
4581
4582 if (conn == NULL) {
4583 return NT_STATUS_INVALID_PARAMETER_MIX;
4584 }
4585
4586 if (session->smb2_channel.signing_key.length != 0) {
4587 return NT_STATUS_INVALID_PARAMETER_MIX;
4588 }
4589
4590 ZERO_STRUCT(channel_key);
4591 memcpy(channel_key, _channel_key.data,
4592 MIN(_channel_key.length, sizeof(channel_key)));
4593
4594 session->smb2_channel.signing_key = data_blob_talloc(session,
4595 channel_key,
4596 sizeof(channel_key));
4597 if (session->smb2_channel.signing_key.data == NULL) {
4598 ZERO_STRUCT(channel_key);
4599 return NT_STATUS_NO_MEMORY;
4600 }
4601
4602 if (conn->protocol >= PROTOCOL_SMB2_24) {
4603 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4604 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4605
4606 smb2_key_derivation(channel_key, sizeof(channel_key),
4607 label.data, label.length,
4608 context.data, context.length,
4609 session->smb2_channel.signing_key.data);
4610 }
4611 ZERO_STRUCT(channel_key);
4612
4613 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4614 session->conn->protocol,
4615 recv_iov, 3);
4616 if (!NT_STATUS_IS_OK(status)) {
4617 return status;
4618 }
4619
4620 return NT_STATUS_OK;
4621 }
4622
4623 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
4624 {
4625 struct smbXcli_tcon *tcon;
4626
4627 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
4628 if (tcon == NULL) {
4629 return NULL;
4630 }
4631
4632 return tcon;
4633 }
4634
4635 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
4636 {
4637 return tcon->smb1.tcon_id;
4638 }
4639
4640 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
4641 {
4642 tcon->smb1.tcon_id = tcon_id;
4643 }
4644
4645 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
4646 uint16_t tcon_id,
4647 uint16_t optional_support,
4648 uint32_t maximal_access,
4649 uint32_t guest_maximal_access,
4650 const char *service,
4651 const char *fs_type)
4652 {
4653 tcon->smb1.tcon_id = tcon_id;
4654 tcon->smb1.optional_support = optional_support;
4655 tcon->smb1.maximal_access = maximal_access;
4656 tcon->smb1.guest_maximal_access = guest_maximal_access;
4657
4658 TALLOC_FREE(tcon->smb1.service);
4659 tcon->smb1.service = talloc_strdup(tcon, service);
4660 if (service != NULL && tcon->smb1.service == NULL) {
4661 return false;
4662 }
4663
4664 TALLOC_FREE(tcon->smb1.fs_type);
4665 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
4666 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
4667 return false;
4668 }
4669
4670 return true;
4671 }
4672
4673 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
4674 {
4675 return tcon->smb2.tcon_id;
4676 }
4677
4678 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
4679 {
4680 return tcon->smb2.capabilities;
4681 }
4682
4683 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
4684 struct smbXcli_session *session,
4685 uint32_t tcon_id,
4686 uint8_t type,
4687 uint32_t flags,
4688 uint32_t capabilities,
4689 uint32_t maximal_access)
4690 {
4691 tcon->smb2.tcon_id = tcon_id;
4692 tcon->smb2.type = type;
4693 tcon->smb2.flags = flags;
4694 tcon->smb2.capabilities = capabilities;
4695 tcon->smb2.maximal_access = maximal_access;
4696
4697 tcon->smb2.should_encrypt = false;
4698
4699 if (session == NULL) {
4700 return;
4701 }
4702
4703 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
4704
4705 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
4706 tcon->smb2.should_encrypt = true;
4707 }
4708 }
reg import