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s3-pysmbd: Add talloc_stackframe() to smbd_set_simple_acl wrapper
[Samba.git] / libcli / smb / smbXcli_base.c
blobc6e3b2a6ce47c43480962c0db18b7da24d80cc03
1 /*
2 Unix SMB/CIFS implementation.
3 Infrastructure for async SMB client requests
4 Copyright (C) Volker Lendecke 2008
5 Copyright (C) Stefan Metzmacher 2011
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "includes.h"
22 #include "system/network.h"
23 #include "../lib/async_req/async_sock.h"
24 #include "../lib/util/tevent_ntstatus.h"
25 #include "../lib/util/tevent_unix.h"
26 #include "lib/util/util_net.h"
27 #include "lib/util/dlinklist.h"
28 #include "../libcli/smb/smb_common.h"
29 #include "../libcli/smb/smb_seal.h"
30 #include "../libcli/smb/smb_signing.h"
31 #include "../libcli/smb/read_smb.h"
32 #include "smbXcli_base.h"
33 #include "librpc/ndr/libndr.h"
34
35 struct smbXcli_conn;
36 struct smbXcli_req;
37 struct smbXcli_session;
38 struct smbXcli_tcon;
39
40 struct smbXcli_conn {
41 int read_fd;
42 int write_fd;
43 struct sockaddr_storage local_ss;
44 struct sockaddr_storage remote_ss;
45 const char *remote_name;
46
47 struct tevent_queue *outgoing;
48 struct tevent_req **pending;
49 struct tevent_req *read_smb_req;
50
51 enum protocol_types protocol;
52 bool allow_signing;
53 bool desire_signing;
54 bool mandatory_signing;
55
56 /*
57 * The incoming dispatch function should return:
58 * - NT_STATUS_RETRY, if more incoming PDUs are expected.
59 * - NT_STATUS_OK, if no more processing is desired, e.g.
60 * the dispatch function called
61 * tevent_req_done().
62 * - All other return values disconnect the connection.
63 */
64 NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
65 TALLOC_CTX *tmp_mem,
66 uint8_t *inbuf);
67
68 struct {
69 struct {
70 uint32_t capabilities;
71 uint32_t max_xmit;
72 } client;
73
74 struct {
75 uint32_t capabilities;
76 uint32_t max_xmit;
77 uint16_t max_mux;
78 uint16_t security_mode;
79 bool readbraw;
80 bool writebraw;
81 bool lockread;
82 bool writeunlock;
83 uint32_t session_key;
84 struct GUID guid;
85 DATA_BLOB gss_blob;
86 uint8_t challenge[8];
87 const char *workgroup;
88 const char *name;
89 int time_zone;
90 NTTIME system_time;
91 } server;
92
93 uint32_t capabilities;
94 uint32_t max_xmit;
95
96 uint16_t mid;
97
98 struct smb_signing_state *signing;
99 struct smb_trans_enc_state *trans_enc;
100
101 struct tevent_req *read_braw_req;
102 } smb1;
103
104 struct {
105 struct {
106 uint32_t capabilities;
107 uint16_t security_mode;
108 struct GUID guid;
109 } client;
110
111 struct {
112 uint32_t capabilities;
113 uint16_t security_mode;
114 struct GUID guid;
115 uint32_t max_trans_size;
116 uint32_t max_read_size;
117 uint32_t max_write_size;
118 NTTIME system_time;
119 NTTIME start_time;
120 DATA_BLOB gss_blob;
121 } server;
122
123 uint64_t mid;
124 uint16_t cur_credits;
125 uint16_t max_credits;
126 } smb2;
127
128 struct smbXcli_session *sessions;
129 };
130
131 struct smb2cli_session {
132 uint64_t session_id;
133 uint16_t session_flags;
134 DATA_BLOB application_key;
135 DATA_BLOB signing_key;
136 bool should_sign;
137 bool should_encrypt;
138 DATA_BLOB encryption_key;
139 DATA_BLOB decryption_key;
140 uint64_t nonce_high;
141 uint64_t nonce_low;
142 uint16_t channel_sequence;
143 };
144
145 struct smbXcli_session {
146 struct smbXcli_session *prev, *next;
147 struct smbXcli_conn *conn;
148
149 struct {
150 uint16_t session_id;
151 DATA_BLOB application_key;
152 bool protected_key;
153 } smb1;
154
155 struct smb2cli_session *smb2;
156
157 struct {
158 DATA_BLOB signing_key;
159 } smb2_channel;
160 };
161
162 struct smbXcli_tcon {
163 struct {
164 uint16_t tcon_id;
165 uint16_t optional_support;
166 uint32_t maximal_access;
167 uint32_t guest_maximal_access;
168 char *service;
169 char *fs_type;
170 } smb1;
171
172 struct {
173 uint32_t tcon_id;
174 uint8_t type;
175 uint32_t flags;
176 uint32_t capabilities;
177 uint32_t maximal_access;
178 bool should_encrypt;
179 } smb2;
180 };
181
182 struct smbXcli_req_state {
183 struct tevent_context *ev;
184 struct smbXcli_conn *conn;
185 struct smbXcli_session *session; /* maybe NULL */
186 struct smbXcli_tcon *tcon; /* maybe NULL */
187
188 uint8_t length_hdr[4];
189
190 bool one_way;
191
192 uint8_t *inbuf;
193
194 struct {
195 /* Space for the header including the wct */
196 uint8_t hdr[HDR_VWV];
197
198 /*
199 * For normal requests, smb1cli_req_send chooses a mid.
200 * SecondaryV trans requests need to use the mid of the primary
201 * request, so we need a place to store it.
202 * Assume it is set if != 0.
203 */
204 uint16_t mid;
205
206 uint16_t *vwv;
207 uint8_t bytecount_buf[2];
208
209 #define MAX_SMB_IOV 10
210 /* length_hdr, hdr, words, byte_count, buffers */
211 struct iovec iov[1 + 3 + MAX_SMB_IOV];
212 int iov_count;
213
214 bool one_way_seqnum;
215 uint32_t seqnum;
216 struct tevent_req **chained_requests;
217
218 uint8_t recv_cmd;
219 NTSTATUS recv_status;
220 /* always an array of 3 talloc elements */
221 struct iovec *recv_iov;
222 } smb1;
223
224 struct {
225 const uint8_t *fixed;
226 uint16_t fixed_len;
227 const uint8_t *dyn;
228 uint32_t dyn_len;
229
230 uint8_t transform[SMB2_TF_HDR_SIZE];
231 uint8_t hdr[SMB2_HDR_BODY];
232 uint8_t pad[7]; /* padding space for compounding */
233
234 /*
235 * always an array of 3 talloc elements
236 * (without a SMB2_TRANSFORM header!)
237 *
238 * HDR, BODY, DYN
239 */
240 struct iovec *recv_iov;
241
242 uint16_t credit_charge;
243
244 bool should_sign;
245 bool should_encrypt;
246
247 bool signing_skipped;
248 bool notify_async;
249 bool got_async;
250 } smb2;
251 };
252
253 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
254 {
255 /*
256 * NT_STATUS_OK, means we do not notify the callers
257 */
258 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
259
260 while (conn->sessions) {
261 conn->sessions->conn = NULL;
262 DLIST_REMOVE(conn->sessions, conn->sessions);
263 }
264
265 if (conn->smb1.trans_enc) {
266 TALLOC_FREE(conn->smb1.trans_enc);
267 }
268
269 return 0;
270 }
271
272 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
273 int fd,
274 const char *remote_name,
275 enum smb_signing_setting signing_state,
276 uint32_t smb1_capabilities,
277 struct GUID *client_guid,
278 uint32_t smb2_capabilities)
279 {
280 struct smbXcli_conn *conn = NULL;
281 void *ss = NULL;
282 struct sockaddr *sa = NULL;
283 socklen_t sa_length;
284 int ret;
285
286 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
287 if (!conn) {
288 return NULL;
289 }
290
291 conn->read_fd = fd;
292 conn->write_fd = dup(fd);
293 if (conn->write_fd == -1) {
294 goto error;
295 }
296
297 conn->remote_name = talloc_strdup(conn, remote_name);
298 if (conn->remote_name == NULL) {
299 goto error;
300 }
301
302
303 ss = (void *)&conn->local_ss;
304 sa = (struct sockaddr *)ss;
305 sa_length = sizeof(conn->local_ss);
306 ret = getsockname(fd, sa, &sa_length);
307 if (ret == -1) {
308 goto error;
309 }
310 ss = (void *)&conn->remote_ss;
311 sa = (struct sockaddr *)ss;
312 sa_length = sizeof(conn->remote_ss);
313 ret = getpeername(fd, sa, &sa_length);
314 if (ret == -1) {
315 goto error;
316 }
317
318 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
319 if (conn->outgoing == NULL) {
320 goto error;
321 }
322 conn->pending = NULL;
323
324 conn->protocol = PROTOCOL_NONE;
325
326 switch (signing_state) {
327 case SMB_SIGNING_OFF:
328 /* never */
329 conn->allow_signing = false;
330 conn->desire_signing = false;
331 conn->mandatory_signing = false;
332 break;
333 case SMB_SIGNING_DEFAULT:
334 case SMB_SIGNING_IF_REQUIRED:
335 /* if the server requires it */
336 conn->allow_signing = true;
337 conn->desire_signing = false;
338 conn->mandatory_signing = false;
339 break;
340 case SMB_SIGNING_REQUIRED:
341 /* always */
342 conn->allow_signing = true;
343 conn->desire_signing = true;
344 conn->mandatory_signing = true;
345 break;
346 }
347
348 conn->smb1.client.capabilities = smb1_capabilities;
349 conn->smb1.client.max_xmit = UINT16_MAX;
350
351 conn->smb1.capabilities = conn->smb1.client.capabilities;
352 conn->smb1.max_xmit = 1024;
353
354 conn->smb1.mid = 1;
355
356 /* initialise signing */
357 conn->smb1.signing = smb_signing_init(conn,
358 conn->allow_signing,
359 conn->desire_signing,
360 conn->mandatory_signing);
361 if (!conn->smb1.signing) {
362 goto error;
363 }
364
365 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
366 if (conn->mandatory_signing) {
367 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
368 }
369 if (client_guid) {
370 conn->smb2.client.guid = *client_guid;
371 }
372 conn->smb2.client.capabilities = smb2_capabilities;
373
374 conn->smb2.cur_credits = 1;
375 conn->smb2.max_credits = 0;
376
377 talloc_set_destructor(conn, smbXcli_conn_destructor);
378 return conn;
379
380 error:
381 if (conn->write_fd != -1) {
382 close(conn->write_fd);
383 }
384 TALLOC_FREE(conn);
385 return NULL;
386 }
387
388 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
389 {
390 if (conn == NULL) {
391 return false;
392 }
393
394 if (conn->read_fd == -1) {
395 return false;
396 }
397
398 return true;
399 }
400
401 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
402 {
403 return conn->protocol;
404 }
405
406 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
407 {
408 if (conn->protocol >= PROTOCOL_SMB2_02) {
409 return true;
410 }
411
412 if (conn->smb1.capabilities & CAP_UNICODE) {
413 return true;
414 }
415
416 return false;
417 }
418
419 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
420 {
421 set_socket_options(conn->read_fd, options);
422 }
423
424 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
425 {
426 return &conn->local_ss;
427 }
428
429 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
430 {
431 return &conn->remote_ss;
432 }
433
434 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
435 {
436 return conn->remote_name;
437 }
438
439 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
440 {
441 if (conn->protocol >= PROTOCOL_SMB2_02) {
442 /*
443 * TODO...
444 */
445 return 1;
446 }
447
448 return conn->smb1.server.max_mux;
449 }
450
451 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
452 {
453 if (conn->protocol >= PROTOCOL_SMB2_02) {
454 return conn->smb2.server.system_time;
455 }
456
457 return conn->smb1.server.system_time;
458 }
459
460 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
461 {
462 if (conn->protocol >= PROTOCOL_SMB2_02) {
463 return &conn->smb2.server.gss_blob;
464 }
465
466 return &conn->smb1.server.gss_blob;
467 }
468
469 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
470 {
471 if (conn->protocol >= PROTOCOL_SMB2_02) {
472 return &conn->smb2.server.guid;
473 }
474
475 return &conn->smb1.server.guid;
476 }
477
478 struct smbXcli_conn_samba_suicide_state {
479 struct smbXcli_conn *conn;
480 struct iovec iov;
481 uint8_t buf[9];
482 };
483
484 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
485
486 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
487 struct tevent_context *ev,
488 struct smbXcli_conn *conn,
489 uint8_t exitcode)
490 {
491 struct tevent_req *req, *subreq;
492 struct smbXcli_conn_samba_suicide_state *state;
493
494 req = tevent_req_create(mem_ctx, &state,
495 struct smbXcli_conn_samba_suicide_state);
496 if (req == NULL) {
497 return NULL;
498 }
499 state->conn = conn;
500 SIVAL(state->buf, 4, 0x74697865);
501 SCVAL(state->buf, 8, exitcode);
502 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
503
504 state->iov.iov_base = state->buf;
505 state->iov.iov_len = sizeof(state->buf);
506
507 subreq = writev_send(state, ev, conn->outgoing, conn->write_fd,
508 false, &state->iov, 1);
509 if (tevent_req_nomem(subreq, req)) {
510 return tevent_req_post(req, ev);
511 }
512 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
513 return req;
514 }
515
516 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
517 {
518 struct tevent_req *req = tevent_req_callback_data(
519 subreq, struct tevent_req);
520 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
521 req, struct smbXcli_conn_samba_suicide_state);
522 ssize_t nwritten;
523 int err;
524
525 nwritten = writev_recv(subreq, &err);
526 TALLOC_FREE(subreq);
527 if (nwritten == -1) {
528 NTSTATUS status = map_nt_error_from_unix_common(err);
529 smbXcli_conn_disconnect(state->conn, status);
530 return;
531 }
532 tevent_req_done(req);
533 }
534
535 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
536 {
537 return tevent_req_simple_recv_ntstatus(req);
538 }
539
540 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
541 uint8_t exitcode)
542 {
543 TALLOC_CTX *frame = talloc_stackframe();
544 struct tevent_context *ev;
545 struct tevent_req *req;
546 NTSTATUS status = NT_STATUS_NO_MEMORY;
547 bool ok;
548
549 if (smbXcli_conn_has_async_calls(conn)) {
550 /*
551 * Can't use sync call while an async call is in flight
552 */
553 status = NT_STATUS_INVALID_PARAMETER_MIX;
554 goto fail;
555 }
556 ev = tevent_context_init(frame);
557 if (ev == NULL) {
558 goto fail;
559 }
560 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
561 if (req == NULL) {
562 goto fail;
563 }
564 ok = tevent_req_poll(req, ev);
565 if (!ok) {
566 status = map_nt_error_from_unix_common(errno);
567 goto fail;
568 }
569 status = smbXcli_conn_samba_suicide_recv(req);
570 fail:
571 TALLOC_FREE(frame);
572 return status;
573 }
574
575 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
576 {
577 return conn->smb1.capabilities;
578 }
579
580 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
581 {
582 return conn->smb1.max_xmit;
583 }
584
585 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
586 {
587 return conn->smb1.server.session_key;
588 }
589
590 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
591 {
592 return conn->smb1.server.challenge;
593 }
594
595 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
596 {
597 return conn->smb1.server.security_mode;
598 }
599
600 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
601 {
602 return conn->smb1.server.readbraw;
603 }
604
605 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
606 {
607 return conn->smb1.server.writebraw;
608 }
609
610 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
611 {
612 return conn->smb1.server.lockread;
613 }
614
615 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
616 {
617 return conn->smb1.server.writeunlock;
618 }
619
620 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
621 {
622 return conn->smb1.server.time_zone;
623 }
624
625 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
626 const DATA_BLOB user_session_key,
627 const DATA_BLOB response)
628 {
629 return smb_signing_activate(conn->smb1.signing,
630 user_session_key,
631 response);
632 }
633
634 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
635 const uint8_t *buf, uint32_t seqnum)
636 {
637 const uint8_t *hdr = buf + NBT_HDR_SIZE;
638 size_t len = smb_len_nbt(buf);
639
640 return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
641 }
642
643 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
644 {
645 return smb_signing_is_active(conn->smb1.signing);
646 }
647
648 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
649 struct smb_trans_enc_state *es)
650 {
651 /* Replace the old state, if any. */
652 if (conn->smb1.trans_enc) {
653 TALLOC_FREE(conn->smb1.trans_enc);
654 }
655 conn->smb1.trans_enc = es;
656 }
657
658 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
659 {
660 return common_encryption_on(conn->smb1.trans_enc);
661 }
662
663
664 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
665 {
666 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
667 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
668
669 if (NT_STATUS_IS_OK(status)) {
670 return NT_STATUS_OK;
671 }
672
673 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
674 return status;
675 }
676
677 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
678 }
679
680 /**
681 * Is the SMB command able to hold an AND_X successor
682 * @param[in] cmd The SMB command in question
683 * @retval Can we add a chained request after "cmd"?
684 */
685 bool smb1cli_is_andx_req(uint8_t cmd)
686 {
687 switch (cmd) {
688 case SMBtconX:
689 case SMBlockingX:
690 case SMBopenX:
691 case SMBreadX:
692 case SMBwriteX:
693 case SMBsesssetupX:
694 case SMBulogoffX:
695 case SMBntcreateX:
696 return true;
697 break;
698 default:
699 break;
700 }
701
702 return false;
703 }
704
705 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
706 {
707 size_t num_pending = talloc_array_length(conn->pending);
708 uint16_t result;
709
710 while (true) {
711 size_t i;
712
713 result = conn->smb1.mid++;
714 if ((result == 0) || (result == 0xffff)) {
715 continue;
716 }
717
718 for (i=0; i<num_pending; i++) {
719 if (result == smb1cli_req_mid(conn->pending[i])) {
720 break;
721 }
722 }
723
724 if (i == num_pending) {
725 return result;
726 }
727 }
728 }
729
730 void smbXcli_req_unset_pending(struct tevent_req *req)
731 {
732 struct smbXcli_req_state *state =
733 tevent_req_data(req,
734 struct smbXcli_req_state);
735 struct smbXcli_conn *conn = state->conn;
736 size_t num_pending = talloc_array_length(conn->pending);
737 size_t i;
738
739 if (state->smb1.mid != 0) {
740 /*
741 * This is a [nt]trans[2] request which waits
742 * for more than one reply.
743 */
744 return;
745 }
746
747 talloc_set_destructor(req, NULL);
748
749 if (num_pending == 1) {
750 /*
751 * The pending read_smb tevent_req is a child of
752 * conn->pending. So if nothing is pending anymore, we need to
753 * delete the socket read fde.
754 */
755 TALLOC_FREE(conn->pending);
756 conn->read_smb_req = NULL;
757 return;
758 }
759
760 for (i=0; i<num_pending; i++) {
761 if (req == conn->pending[i]) {
762 break;
763 }
764 }
765 if (i == num_pending) {
766 /*
767 * Something's seriously broken. Just returning here is the
768 * right thing nevertheless, the point of this routine is to
769 * remove ourselves from conn->pending.
770 */
771 return;
772 }
773
774 /*
775 * Remove ourselves from the conn->pending array
776 */
777 for (; i < (num_pending - 1); i++) {
778 conn->pending[i] = conn->pending[i+1];
779 }
780
781 /*
782 * No NULL check here, we're shrinking by sizeof(void *), and
783 * talloc_realloc just adjusts the size for this.
784 */
785 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
786 num_pending - 1);
787 return;
788 }
789
790 static int smbXcli_req_destructor(struct tevent_req *req)
791 {
792 struct smbXcli_req_state *state =
793 tevent_req_data(req,
794 struct smbXcli_req_state);
795
796 /*
797 * Make sure we really remove it from
798 * the pending array on destruction.
799 */
800 state->smb1.mid = 0;
801 smbXcli_req_unset_pending(req);
802 return 0;
803 }
804
805 static bool smb1cli_req_cancel(struct tevent_req *req);
806 static bool smb2cli_req_cancel(struct tevent_req *req);
807
808 static bool smbXcli_req_cancel(struct tevent_req *req)
809 {
810 struct smbXcli_req_state *state =
811 tevent_req_data(req,
812 struct smbXcli_req_state);
813
814 if (!smbXcli_conn_is_connected(state->conn)) {
815 return false;
816 }
817
818 if (state->conn->protocol == PROTOCOL_NONE) {
819 return false;
820 }
821
822 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
823 return smb2cli_req_cancel(req);
824 }
825
826 return smb1cli_req_cancel(req);
827 }
828
829 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
830
831 bool smbXcli_req_set_pending(struct tevent_req *req)
832 {
833 struct smbXcli_req_state *state =
834 tevent_req_data(req,
835 struct smbXcli_req_state);
836 struct smbXcli_conn *conn;
837 struct tevent_req **pending;
838 size_t num_pending;
839
840 conn = state->conn;
841
842 if (!smbXcli_conn_is_connected(conn)) {
843 return false;
844 }
845
846 num_pending = talloc_array_length(conn->pending);
847
848 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
849 num_pending+1);
850 if (pending == NULL) {
851 return false;
852 }
853 pending[num_pending] = req;
854 conn->pending = pending;
855 talloc_set_destructor(req, smbXcli_req_destructor);
856 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
857
858 if (!smbXcli_conn_receive_next(conn)) {
859 /*
860 * the caller should notify the current request
861 *
862 * And all other pending requests get notified
863 * by smbXcli_conn_disconnect().
864 */
865 smbXcli_req_unset_pending(req);
866 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
867 return false;
868 }
869
870 return true;
871 }
872
873 static void smbXcli_conn_received(struct tevent_req *subreq);
874
875 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
876 {
877 size_t num_pending = talloc_array_length(conn->pending);
878 struct tevent_req *req;
879 struct smbXcli_req_state *state;
880
881 if (conn->read_smb_req != NULL) {
882 return true;
883 }
884
885 if (num_pending == 0) {
886 if (conn->smb2.mid < UINT64_MAX) {
887 /* no more pending requests, so we are done for now */
888 return true;
889 }
890
891 /*
892 * If there are no more SMB2 requests possible,
893 * because we are out of message ids,
894 * we need to disconnect.
895 */
896 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
897 return true;
898 }
899
900 req = conn->pending[0];
901 state = tevent_req_data(req, struct smbXcli_req_state);
902
903 /*
904 * We're the first ones, add the read_smb request that waits for the
905 * answer from the server
906 */
907 conn->read_smb_req = read_smb_send(conn->pending,
908 state->ev,
909 conn->read_fd);
910 if (conn->read_smb_req == NULL) {
911 return false;
912 }
913 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
914 return true;
915 }
916
917 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
918 {
919 struct smbXcli_session *session;
920
921 tevent_queue_stop(conn->outgoing);
922
923 if (conn->read_fd != -1) {
924 close(conn->read_fd);
925 }
926 if (conn->write_fd != -1) {
927 close(conn->write_fd);
928 }
929 conn->read_fd = -1;
930 conn->write_fd = -1;
931
932 session = conn->sessions;
933 if (talloc_array_length(conn->pending) == 0) {
934 /*
935 * if we do not have pending requests
936 * there is no need to update the channel_sequence
937 */
938 session = NULL;
939 }
940 for (; session; session = session->next) {
941 smb2cli_session_increment_channel_sequence(session);
942 }
943
944 /*
945 * Cancel all pending requests. We do not do a for-loop walking
946 * conn->pending because that array changes in
947 * smbXcli_req_unset_pending.
948 */
949 while (talloc_array_length(conn->pending) > 0) {
950 struct tevent_req *req;
951 struct smbXcli_req_state *state;
952 struct tevent_req **chain;
953 size_t num_chained;
954 size_t i;
955
956 req = conn->pending[0];
957 state = tevent_req_data(req, struct smbXcli_req_state);
958
959 if (state->smb1.chained_requests == NULL) {
960 /*
961 * We're dead. No point waiting for trans2
962 * replies.
963 */
964 state->smb1.mid = 0;
965
966 smbXcli_req_unset_pending(req);
967
968 if (NT_STATUS_IS_OK(status)) {
969 /* do not notify the callers */
970 continue;
971 }
972
973 /*
974 * we need to defer the callback, because we may notify
975 * more then one caller.
976 */
977 tevent_req_defer_callback(req, state->ev);
978 tevent_req_nterror(req, status);
979 continue;
980 }
981
982 chain = talloc_move(conn, &state->smb1.chained_requests);
983 num_chained = talloc_array_length(chain);
984
985 for (i=0; i<num_chained; i++) {
986 req = chain[i];
987 state = tevent_req_data(req, struct smbXcli_req_state);
988
989 /*
990 * We're dead. No point waiting for trans2
991 * replies.
992 */
993 state->smb1.mid = 0;
994
995 smbXcli_req_unset_pending(req);
996
997 if (NT_STATUS_IS_OK(status)) {
998 /* do not notify the callers */
999 continue;
1000 }
1001
1002 /*
1003 * we need to defer the callback, because we may notify
1004 * more than one caller.
1005 */
1006 tevent_req_defer_callback(req, state->ev);
1007 tevent_req_nterror(req, status);
1008 }
1009 TALLOC_FREE(chain);
1010 }
1011 }
1012
1013 /*
1014 * Fetch a smb request's mid. Only valid after the request has been sent by
1015 * smb1cli_req_send().
1016 */
1017 uint16_t smb1cli_req_mid(struct tevent_req *req)
1018 {
1019 struct smbXcli_req_state *state =
1020 tevent_req_data(req,
1021 struct smbXcli_req_state);
1022
1023 if (state->smb1.mid != 0) {
1024 return state->smb1.mid;
1025 }
1026
1027 return SVAL(state->smb1.hdr, HDR_MID);
1028 }
1029
1030 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1031 {
1032 struct smbXcli_req_state *state =
1033 tevent_req_data(req,
1034 struct smbXcli_req_state);
1035
1036 state->smb1.mid = mid;
1037 }
1038
1039 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1040 {
1041 struct smbXcli_req_state *state =
1042 tevent_req_data(req,
1043 struct smbXcli_req_state);
1044
1045 return state->smb1.seqnum;
1046 }
1047
1048 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1049 {
1050 struct smbXcli_req_state *state =
1051 tevent_req_data(req,
1052 struct smbXcli_req_state);
1053
1054 state->smb1.seqnum = seqnum;
1055 }
1056
1057 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1058 {
1059 size_t result = 0;
1060 int i;
1061 for (i=0; i<count; i++) {
1062 result += iov[i].iov_len;
1063 }
1064 return result;
1065 }
1066
1067 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1068 const struct iovec *iov,
1069 int count)
1070 {
1071 size_t len = smbXcli_iov_len(iov, count);
1072 size_t copied;
1073 uint8_t *buf;
1074 int i;
1075
1076 buf = talloc_array(mem_ctx, uint8_t, len);
1077 if (buf == NULL) {
1078 return NULL;
1079 }
1080 copied = 0;
1081 for (i=0; i<count; i++) {
1082 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
1083 copied += iov[i].iov_len;
1084 }
1085 return buf;
1086 }
1087
1088 static void smb1cli_req_flags(enum protocol_types protocol,
1089 uint32_t smb1_capabilities,
1090 uint8_t smb_command,
1091 uint8_t additional_flags,
1092 uint8_t clear_flags,
1093 uint8_t *_flags,
1094 uint16_t additional_flags2,
1095 uint16_t clear_flags2,
1096 uint16_t *_flags2)
1097 {
1098 uint8_t flags = 0;
1099 uint16_t flags2 = 0;
1100
1101 if (protocol >= PROTOCOL_LANMAN1) {
1102 flags |= FLAG_CASELESS_PATHNAMES;
1103 flags |= FLAG_CANONICAL_PATHNAMES;
1104 }
1105
1106 if (protocol >= PROTOCOL_LANMAN2) {
1107 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1108 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1109 }
1110
1111 if (protocol >= PROTOCOL_NT1) {
1112 flags2 |= FLAGS2_IS_LONG_NAME;
1113
1114 if (smb1_capabilities & CAP_UNICODE) {
1115 flags2 |= FLAGS2_UNICODE_STRINGS;
1116 }
1117 if (smb1_capabilities & CAP_STATUS32) {
1118 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1119 }
1120 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1121 flags2 |= FLAGS2_EXTENDED_SECURITY;
1122 }
1123 }
1124
1125 flags |= additional_flags;
1126 flags &= ~clear_flags;
1127 flags2 |= additional_flags2;
1128 flags2 &= ~clear_flags2;
1129
1130 *_flags = flags;
1131 *_flags2 = flags2;
1132 }
1133
1134 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1135
1136 static bool smb1cli_req_cancel(struct tevent_req *req)
1137 {
1138 struct smbXcli_req_state *state =
1139 tevent_req_data(req,
1140 struct smbXcli_req_state);
1141 uint8_t flags;
1142 uint16_t flags2;
1143 uint32_t pid;
1144 uint16_t mid;
1145 struct tevent_req *subreq;
1146 NTSTATUS status;
1147
1148 flags = CVAL(state->smb1.hdr, HDR_FLG);
1149 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1150 pid = SVAL(state->smb1.hdr, HDR_PID);
1151 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1152 mid = SVAL(state->smb1.hdr, HDR_MID);
1153
1154 subreq = smb1cli_req_create(state, state->ev,
1155 state->conn,
1156 SMBntcancel,
1157 flags, 0,
1158 flags2, 0,
1159 0, /* timeout */
1160 pid,
1161 state->tcon,
1162 state->session,
1163 0, NULL, /* vwv */
1164 0, NULL); /* bytes */
1165 if (subreq == NULL) {
1166 return false;
1167 }
1168 smb1cli_req_set_mid(subreq, mid);
1169
1170 status = smb1cli_req_chain_submit(&subreq, 1);
1171 if (!NT_STATUS_IS_OK(status)) {
1172 TALLOC_FREE(subreq);
1173 return false;
1174 }
1175 smb1cli_req_set_mid(subreq, 0);
1176
1177 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1178
1179 return true;
1180 }
1181
1182 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1183 {
1184 /* we do not care about the result */
1185 TALLOC_FREE(subreq);
1186 }
1187
1188 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1189 struct tevent_context *ev,
1190 struct smbXcli_conn *conn,
1191 uint8_t smb_command,
1192 uint8_t additional_flags,
1193 uint8_t clear_flags,
1194 uint16_t additional_flags2,
1195 uint16_t clear_flags2,
1196 uint32_t timeout_msec,
1197 uint32_t pid,
1198 struct smbXcli_tcon *tcon,
1199 struct smbXcli_session *session,
1200 uint8_t wct, uint16_t *vwv,
1201 int iov_count,
1202 struct iovec *bytes_iov)
1203 {
1204 struct tevent_req *req;
1205 struct smbXcli_req_state *state;
1206 uint8_t flags = 0;
1207 uint16_t flags2 = 0;
1208 uint16_t uid = 0;
1209 uint16_t tid = 0;
1210
1211 if (iov_count > MAX_SMB_IOV) {
1212 /*
1213 * Should not happen :-)
1214 */
1215 return NULL;
1216 }
1217
1218 req = tevent_req_create(mem_ctx, &state,
1219 struct smbXcli_req_state);
1220 if (req == NULL) {
1221 return NULL;
1222 }
1223 state->ev = ev;
1224 state->conn = conn;
1225 state->session = session;
1226 state->tcon = tcon;
1227
1228 if (session) {
1229 uid = session->smb1.session_id;
1230 }
1231
1232 if (tcon) {
1233 tid = tcon->smb1.tcon_id;
1234 }
1235
1236 state->smb1.recv_cmd = 0xFF;
1237 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1238 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1239 if (state->smb1.recv_iov == NULL) {
1240 TALLOC_FREE(req);
1241 return NULL;
1242 }
1243
1244 smb1cli_req_flags(conn->protocol,
1245 conn->smb1.capabilities,
1246 smb_command,
1247 additional_flags,
1248 clear_flags,
1249 &flags,
1250 additional_flags2,
1251 clear_flags2,
1252 &flags2);
1253
1254 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1255 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1256 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1257 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1258 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1259 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1260 SSVAL(state->smb1.hdr, HDR_TID, tid);
1261 SSVAL(state->smb1.hdr, HDR_PID, pid);
1262 SSVAL(state->smb1.hdr, HDR_UID, uid);
1263 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1264 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1265
1266 state->smb1.vwv = vwv;
1267
1268 SSVAL(state->smb1.bytecount_buf, 0, smbXcli_iov_len(bytes_iov, iov_count));
1269
1270 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1271 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1272 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1273 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1274 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1275 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1276 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1277 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1278
1279 if (iov_count != 0) {
1280 memcpy(&state->smb1.iov[4], bytes_iov,
1281 iov_count * sizeof(*bytes_iov));
1282 }
1283 state->smb1.iov_count = iov_count + 4;
1284
1285 if (timeout_msec > 0) {
1286 struct timeval endtime;
1287
1288 endtime = timeval_current_ofs_msec(timeout_msec);
1289 if (!tevent_req_set_endtime(req, ev, endtime)) {
1290 return req;
1291 }
1292 }
1293
1294 switch (smb_command) {
1295 case SMBtranss:
1296 case SMBtranss2:
1297 case SMBnttranss:
1298 state->one_way = true;
1299 break;
1300 case SMBntcancel:
1301 state->one_way = true;
1302 state->smb1.one_way_seqnum = true;
1303 break;
1304 case SMBlockingX:
1305 if ((wct == 8) &&
1306 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1307 state->one_way = true;
1308 }
1309 break;
1310 }
1311
1312 return req;
1313 }
1314
1315 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1316 struct iovec *iov, int iov_count,
1317 uint32_t *seqnum,
1318 bool one_way_seqnum)
1319 {
1320 TALLOC_CTX *frame = NULL;
1321 uint8_t *buf;
1322
1323 /*
1324 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1325 * iovec directly. MD5Update would do that just fine.
1326 */
1327
1328 if (iov_count < 4) {
1329 return NT_STATUS_INVALID_PARAMETER_MIX;
1330 }
1331 if (iov[0].iov_len != NBT_HDR_SIZE) {
1332 return NT_STATUS_INVALID_PARAMETER_MIX;
1333 }
1334 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1335 return NT_STATUS_INVALID_PARAMETER_MIX;
1336 }
1337 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1338 return NT_STATUS_INVALID_PARAMETER_MIX;
1339 }
1340 if (iov[3].iov_len != sizeof(uint16_t)) {
1341 return NT_STATUS_INVALID_PARAMETER_MIX;
1342 }
1343
1344 frame = talloc_stackframe();
1345
1346 buf = smbXcli_iov_concat(frame, &iov[1], iov_count - 1);
1347 if (buf == NULL) {
1348 return NT_STATUS_NO_MEMORY;
1349 }
1350
1351 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1352 one_way_seqnum);
1353 smb_signing_sign_pdu(conn->smb1.signing,
1354 buf, talloc_get_size(buf),
1355 *seqnum);
1356 memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1357
1358 TALLOC_FREE(frame);
1359 return NT_STATUS_OK;
1360 }
1361
1362 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1363 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1364 TALLOC_CTX *tmp_mem,
1365 uint8_t *inbuf);
1366
1367 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1368 struct smbXcli_req_state *state,
1369 struct iovec *iov, int iov_count)
1370 {
1371 struct tevent_req *subreq;
1372 NTSTATUS status;
1373 uint8_t cmd;
1374 uint16_t mid;
1375
1376 if (!smbXcli_conn_is_connected(state->conn)) {
1377 return NT_STATUS_CONNECTION_DISCONNECTED;
1378 }
1379
1380 if (state->conn->protocol > PROTOCOL_NT1) {
1381 return NT_STATUS_REVISION_MISMATCH;
1382 }
1383
1384 if (iov_count < 4) {
1385 return NT_STATUS_INVALID_PARAMETER_MIX;
1386 }
1387 if (iov[0].iov_len != NBT_HDR_SIZE) {
1388 return NT_STATUS_INVALID_PARAMETER_MIX;
1389 }
1390 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1391 return NT_STATUS_INVALID_PARAMETER_MIX;
1392 }
1393 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1394 return NT_STATUS_INVALID_PARAMETER_MIX;
1395 }
1396 if (iov[3].iov_len != sizeof(uint16_t)) {
1397 return NT_STATUS_INVALID_PARAMETER_MIX;
1398 }
1399
1400 cmd = CVAL(iov[1].iov_base, HDR_COM);
1401 if (cmd == SMBreadBraw) {
1402 if (smbXcli_conn_has_async_calls(state->conn)) {
1403 return NT_STATUS_INVALID_PARAMETER_MIX;
1404 }
1405 state->conn->smb1.read_braw_req = req;
1406 }
1407
1408 if (state->smb1.mid != 0) {
1409 mid = state->smb1.mid;
1410 } else {
1411 mid = smb1cli_alloc_mid(state->conn);
1412 }
1413 SSVAL(iov[1].iov_base, HDR_MID, mid);
1414
1415 _smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
1416
1417 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1418 &state->smb1.seqnum,
1419 state->smb1.one_way_seqnum);
1420
1421 if (!NT_STATUS_IS_OK(status)) {
1422 return status;
1423 }
1424
1425 /*
1426 * If we supported multiple encrytion contexts
1427 * here we'd look up based on tid.
1428 */
1429 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1430 char *buf, *enc_buf;
1431
1432 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1433 if (buf == NULL) {
1434 return NT_STATUS_NO_MEMORY;
1435 }
1436 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1437 (char *)buf, &enc_buf);
1438 TALLOC_FREE(buf);
1439 if (!NT_STATUS_IS_OK(status)) {
1440 DEBUG(0, ("Error in encrypting client message: %s\n",
1441 nt_errstr(status)));
1442 return status;
1443 }
1444 buf = (char *)talloc_memdup(state, enc_buf,
1445 smb_len_nbt(enc_buf)+4);
1446 SAFE_FREE(enc_buf);
1447 if (buf == NULL) {
1448 return NT_STATUS_NO_MEMORY;
1449 }
1450 iov[0].iov_base = (void *)buf;
1451 iov[0].iov_len = talloc_get_size(buf);
1452 iov_count = 1;
1453 }
1454
1455 if (state->conn->dispatch_incoming == NULL) {
1456 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1457 }
1458
1459 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1460
1461 subreq = writev_send(state, state->ev, state->conn->outgoing,
1462 state->conn->write_fd, false, iov, iov_count);
1463 if (subreq == NULL) {
1464 return NT_STATUS_NO_MEMORY;
1465 }
1466 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1467 return NT_STATUS_OK;
1468 }
1469
1470 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1471 struct tevent_context *ev,
1472 struct smbXcli_conn *conn,
1473 uint8_t smb_command,
1474 uint8_t additional_flags,
1475 uint8_t clear_flags,
1476 uint16_t additional_flags2,
1477 uint16_t clear_flags2,
1478 uint32_t timeout_msec,
1479 uint32_t pid,
1480 struct smbXcli_tcon *tcon,
1481 struct smbXcli_session *session,
1482 uint8_t wct, uint16_t *vwv,
1483 uint32_t num_bytes,
1484 const uint8_t *bytes)
1485 {
1486 struct tevent_req *req;
1487 struct iovec iov;
1488 NTSTATUS status;
1489
1490 iov.iov_base = discard_const_p(void, bytes);
1491 iov.iov_len = num_bytes;
1492
1493 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1494 additional_flags, clear_flags,
1495 additional_flags2, clear_flags2,
1496 timeout_msec,
1497 pid, tcon, session,
1498 wct, vwv, 1, &iov);
1499 if (req == NULL) {
1500 return NULL;
1501 }
1502 if (!tevent_req_is_in_progress(req)) {
1503 return tevent_req_post(req, ev);
1504 }
1505 status = smb1cli_req_chain_submit(&req, 1);
1506 if (tevent_req_nterror(req, status)) {
1507 return tevent_req_post(req, ev);
1508 }
1509 return req;
1510 }
1511
1512 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1513 {
1514 struct tevent_req *req =
1515 tevent_req_callback_data(subreq,
1516 struct tevent_req);
1517 struct smbXcli_req_state *state =
1518 tevent_req_data(req,
1519 struct smbXcli_req_state);
1520 ssize_t nwritten;
1521 int err;
1522
1523 nwritten = writev_recv(subreq, &err);
1524 TALLOC_FREE(subreq);
1525 if (nwritten == -1) {
1526 NTSTATUS status = map_nt_error_from_unix_common(err);
1527 smbXcli_conn_disconnect(state->conn, status);
1528 return;
1529 }
1530
1531 if (state->one_way) {
1532 state->inbuf = NULL;
1533 tevent_req_done(req);
1534 return;
1535 }
1536
1537 if (!smbXcli_req_set_pending(req)) {
1538 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1539 return;
1540 }
1541 }
1542
1543 static void smbXcli_conn_received(struct tevent_req *subreq)
1544 {
1545 struct smbXcli_conn *conn =
1546 tevent_req_callback_data(subreq,
1547 struct smbXcli_conn);
1548 TALLOC_CTX *frame = talloc_stackframe();
1549 NTSTATUS status;
1550 uint8_t *inbuf;
1551 ssize_t received;
1552 int err;
1553
1554 if (subreq != conn->read_smb_req) {
1555 DEBUG(1, ("Internal error: cli_smb_received called with "
1556 "unexpected subreq\n"));
1557 status = NT_STATUS_INTERNAL_ERROR;
1558 smbXcli_conn_disconnect(conn, status);
1559 TALLOC_FREE(frame);
1560 return;
1561 }
1562 conn->read_smb_req = NULL;
1563
1564 received = read_smb_recv(subreq, frame, &inbuf, &err);
1565 TALLOC_FREE(subreq);
1566 if (received == -1) {
1567 status = map_nt_error_from_unix_common(err);
1568 smbXcli_conn_disconnect(conn, status);
1569 TALLOC_FREE(frame);
1570 return;
1571 }
1572
1573 status = conn->dispatch_incoming(conn, frame, inbuf);
1574 TALLOC_FREE(frame);
1575 if (NT_STATUS_IS_OK(status)) {
1576 /*
1577 * We should not do any more processing
1578 * as the dispatch function called
1579 * tevent_req_done().
1580 */
1581 return;
1582 } else if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1583 /*
1584 * We got an error, so notify all pending requests
1585 */
1586 smbXcli_conn_disconnect(conn, status);
1587 return;
1588 }
1589
1590 /*
1591 * We got NT_STATUS_RETRY, so we may ask for a
1592 * next incoming pdu.
1593 */
1594 if (!smbXcli_conn_receive_next(conn)) {
1595 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1596 }
1597 }
1598
1599 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1600 struct iovec **piov, int *pnum_iov)
1601 {
1602 struct iovec *iov;
1603 int num_iov;
1604 size_t buflen;
1605 size_t taken;
1606 size_t remaining;
1607 uint8_t *hdr;
1608 uint8_t cmd;
1609 uint32_t wct_ofs;
1610
1611 buflen = smb_len_nbt(buf);
1612 taken = 0;
1613
1614 hdr = buf + NBT_HDR_SIZE;
1615
1616 if (buflen < MIN_SMB_SIZE) {
1617 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1618 }
1619
1620 /*
1621 * This returns iovec elements in the following order:
1622 *
1623 * - SMB header
1624 *
1625 * - Parameter Block
1626 * - Data Block
1627 *
1628 * - Parameter Block
1629 * - Data Block
1630 *
1631 * - Parameter Block
1632 * - Data Block
1633 */
1634 num_iov = 1;
1635
1636 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1637 if (iov == NULL) {
1638 return NT_STATUS_NO_MEMORY;
1639 }
1640 iov[0].iov_base = hdr;
1641 iov[0].iov_len = HDR_WCT;
1642 taken += HDR_WCT;
1643
1644 cmd = CVAL(hdr, HDR_COM);
1645 wct_ofs = HDR_WCT;
1646
1647 while (true) {
1648 size_t len = buflen - taken;
1649 struct iovec *cur;
1650 struct iovec *iov_tmp;
1651 uint8_t wct;
1652 uint32_t bcc_ofs;
1653 uint16_t bcc;
1654 size_t needed;
1655
1656 /*
1657 * we need at least WCT and BCC
1658 */
1659 needed = sizeof(uint8_t) + sizeof(uint16_t);
1660 if (len < needed) {
1661 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1662 __location__, (int)len, (int)needed));
1663 goto inval;
1664 }
1665
1666 /*
1667 * Now we check if the specified words are there
1668 */
1669 wct = CVAL(hdr, wct_ofs);
1670 needed += wct * sizeof(uint16_t);
1671 if (len < needed) {
1672 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1673 __location__, (int)len, (int)needed));
1674 goto inval;
1675 }
1676
1677 /*
1678 * Now we check if the specified bytes are there
1679 */
1680 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1681 bcc = SVAL(hdr, bcc_ofs);
1682 needed += bcc * sizeof(uint8_t);
1683 if (len < needed) {
1684 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1685 __location__, (int)len, (int)needed));
1686 goto inval;
1687 }
1688
1689 /*
1690 * we allocate 2 iovec structures for words and bytes
1691 */
1692 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1693 num_iov + 2);
1694 if (iov_tmp == NULL) {
1695 TALLOC_FREE(iov);
1696 return NT_STATUS_NO_MEMORY;
1697 }
1698 iov = iov_tmp;
1699 cur = &iov[num_iov];
1700 num_iov += 2;
1701
1702 cur[0].iov_len = wct * sizeof(uint16_t);
1703 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1704 cur[1].iov_len = bcc * sizeof(uint8_t);
1705 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1706
1707 taken += needed;
1708
1709 if (!smb1cli_is_andx_req(cmd)) {
1710 /*
1711 * If the current command does not have AndX chanining
1712 * we are done.
1713 */
1714 break;
1715 }
1716
1717 if (wct == 0 && bcc == 0) {
1718 /*
1719 * An empty response also ends the chain,
1720 * most likely with an error.
1721 */
1722 break;
1723 }
1724
1725 if (wct < 2) {
1726 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1727 __location__, (int)wct, (int)cmd));
1728 goto inval;
1729 }
1730 cmd = CVAL(cur[0].iov_base, 0);
1731 if (cmd == 0xFF) {
1732 /*
1733 * If it is the end of the chain we are also done.
1734 */
1735 break;
1736 }
1737 wct_ofs = SVAL(cur[0].iov_base, 2);
1738
1739 if (wct_ofs < taken) {
1740 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1741 }
1742 if (wct_ofs > buflen) {
1743 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1744 }
1745
1746 /*
1747 * we consumed everything up to the start of the next
1748 * parameter block.
1749 */
1750 taken = wct_ofs;
1751 }
1752
1753 remaining = buflen - taken;
1754
1755 if (remaining > 0 && num_iov >= 3) {
1756 /*
1757 * The last DATA block gets the remaining
1758 * bytes, this is needed to support
1759 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1760 */
1761 iov[num_iov-1].iov_len += remaining;
1762 }
1763
1764 *piov = iov;
1765 *pnum_iov = num_iov;
1766 return NT_STATUS_OK;
1767
1768 inval:
1769 TALLOC_FREE(iov);
1770 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1771 }
1772
1773 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1774 TALLOC_CTX *tmp_mem,
1775 uint8_t *inbuf)
1776 {
1777 struct tevent_req *req;
1778 struct smbXcli_req_state *state;
1779 NTSTATUS status;
1780 size_t num_pending;
1781 size_t i;
1782 uint8_t cmd;
1783 uint16_t mid;
1784 bool oplock_break;
1785 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1786 size_t len = smb_len_nbt(inbuf);
1787 struct iovec *iov = NULL;
1788 int num_iov = 0;
1789 struct tevent_req **chain = NULL;
1790 size_t num_chained = 0;
1791 size_t num_responses = 0;
1792
1793 if (conn->smb1.read_braw_req != NULL) {
1794 req = conn->smb1.read_braw_req;
1795 conn->smb1.read_braw_req = NULL;
1796 state = tevent_req_data(req, struct smbXcli_req_state);
1797
1798 smbXcli_req_unset_pending(req);
1799
1800 if (state->smb1.recv_iov == NULL) {
1801 /*
1802 * For requests with more than
1803 * one response, we have to readd the
1804 * recv_iov array.
1805 */
1806 state->smb1.recv_iov = talloc_zero_array(state,
1807 struct iovec,
1808 3);
1809 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1810 return NT_STATUS_OK;
1811 }
1812 }
1813
1814 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
1815 state->smb1.recv_iov[0].iov_len = len;
1816 ZERO_STRUCT(state->smb1.recv_iov[1]);
1817 ZERO_STRUCT(state->smb1.recv_iov[2]);
1818
1819 state->smb1.recv_cmd = SMBreadBraw;
1820 state->smb1.recv_status = NT_STATUS_OK;
1821 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1822
1823 tevent_req_done(req);
1824 return NT_STATUS_OK;
1825 }
1826
1827 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1828 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1829 DEBUG(10, ("Got non-SMB PDU\n"));
1830 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1831 }
1832
1833 /*
1834 * If we supported multiple encrytion contexts
1835 * here we'd look up based on tid.
1836 */
1837 if (common_encryption_on(conn->smb1.trans_enc)
1838 && (CVAL(inbuf, 0) == 0)) {
1839 uint16_t enc_ctx_num;
1840
1841 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1842 if (!NT_STATUS_IS_OK(status)) {
1843 DEBUG(10, ("get_enc_ctx_num returned %s\n",
1844 nt_errstr(status)));
1845 return status;
1846 }
1847
1848 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1849 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1850 enc_ctx_num,
1851 conn->smb1.trans_enc->enc_ctx_num));
1852 return NT_STATUS_INVALID_HANDLE;
1853 }
1854
1855 status = common_decrypt_buffer(conn->smb1.trans_enc,
1856 (char *)inbuf);
1857 if (!NT_STATUS_IS_OK(status)) {
1858 DEBUG(10, ("common_decrypt_buffer returned %s\n",
1859 nt_errstr(status)));
1860 return status;
1861 }
1862 inhdr = inbuf + NBT_HDR_SIZE;
1863 len = smb_len_nbt(inbuf);
1864 }
1865
1866 mid = SVAL(inhdr, HDR_MID);
1867 num_pending = talloc_array_length(conn->pending);
1868
1869 for (i=0; i<num_pending; i++) {
1870 if (mid == smb1cli_req_mid(conn->pending[i])) {
1871 break;
1872 }
1873 }
1874 if (i == num_pending) {
1875 /* Dump unexpected reply */
1876 return NT_STATUS_RETRY;
1877 }
1878
1879 oplock_break = false;
1880
1881 if (mid == 0xffff) {
1882 /*
1883 * Paranoia checks that this is really an oplock break request.
1884 */
1885 oplock_break = (len == 51); /* hdr + 8 words */
1886 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
1887 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
1888 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
1889 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
1890
1891 if (!oplock_break) {
1892 /* Dump unexpected reply */
1893 return NT_STATUS_RETRY;
1894 }
1895 }
1896
1897 req = conn->pending[i];
1898 state = tevent_req_data(req, struct smbXcli_req_state);
1899
1900 if (!oplock_break /* oplock breaks are not signed */
1901 && !smb_signing_check_pdu(conn->smb1.signing,
1902 inhdr, len, state->smb1.seqnum+1)) {
1903 DEBUG(10, ("cli_check_sign_mac failed\n"));
1904 return NT_STATUS_ACCESS_DENIED;
1905 }
1906
1907 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
1908 &iov, &num_iov);
1909 if (!NT_STATUS_IS_OK(status)) {
1910 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
1911 nt_errstr(status)));
1912 return status;
1913 }
1914
1915 cmd = CVAL(inhdr, HDR_COM);
1916 status = smb1cli_pull_raw_error(inhdr);
1917
1918 if (state->smb1.chained_requests == NULL) {
1919 if (num_iov != 3) {
1920 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1921 }
1922
1923 smbXcli_req_unset_pending(req);
1924
1925 if (state->smb1.recv_iov == NULL) {
1926 /*
1927 * For requests with more than
1928 * one response, we have to readd the
1929 * recv_iov array.
1930 */
1931 state->smb1.recv_iov = talloc_zero_array(state,
1932 struct iovec,
1933 3);
1934 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1935 return NT_STATUS_OK;
1936 }
1937 }
1938
1939 state->smb1.recv_cmd = cmd;
1940 state->smb1.recv_status = status;
1941 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1942
1943 state->smb1.recv_iov[0] = iov[0];
1944 state->smb1.recv_iov[1] = iov[1];
1945 state->smb1.recv_iov[2] = iov[2];
1946
1947 if (talloc_array_length(conn->pending) == 0) {
1948 tevent_req_done(req);
1949 return NT_STATUS_OK;
1950 }
1951
1952 tevent_req_defer_callback(req, state->ev);
1953 tevent_req_done(req);
1954 return NT_STATUS_RETRY;
1955 }
1956
1957 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
1958 num_chained = talloc_array_length(chain);
1959 num_responses = (num_iov - 1)/2;
1960
1961 if (num_responses > num_chained) {
1962 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1963 }
1964
1965 for (i=0; i<num_chained; i++) {
1966 size_t iov_idx = 1 + (i*2);
1967 struct iovec *cur = &iov[iov_idx];
1968 uint8_t *inbuf_ref;
1969
1970 req = chain[i];
1971 state = tevent_req_data(req, struct smbXcli_req_state);
1972
1973 smbXcli_req_unset_pending(req);
1974
1975 /*
1976 * as we finish multiple requests here
1977 * we need to defer the callbacks as
1978 * they could destroy our current stack state.
1979 */
1980 tevent_req_defer_callback(req, state->ev);
1981
1982 if (i >= num_responses) {
1983 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
1984 continue;
1985 }
1986
1987 if (state->smb1.recv_iov == NULL) {
1988 /*
1989 * For requests with more than
1990 * one response, we have to readd the
1991 * recv_iov array.
1992 */
1993 state->smb1.recv_iov = talloc_zero_array(state,
1994 struct iovec,
1995 3);
1996 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1997 continue;
1998 }
1999 }
2000
2001 state->smb1.recv_cmd = cmd;
2002
2003 if (i == (num_responses - 1)) {
2004 /*
2005 * The last request in the chain gets the status
2006 */
2007 state->smb1.recv_status = status;
2008 } else {
2009 cmd = CVAL(cur[0].iov_base, 0);
2010 state->smb1.recv_status = NT_STATUS_OK;
2011 }
2012
2013 state->inbuf = inbuf;
2014
2015 /*
2016 * Note: here we use talloc_reference() in a way
2017 * that does not expose it to the caller.
2018 */
2019 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2020 if (tevent_req_nomem(inbuf_ref, req)) {
2021 continue;
2022 }
2023
2024 /* copy the related buffers */
2025 state->smb1.recv_iov[0] = iov[0];
2026 state->smb1.recv_iov[1] = cur[0];
2027 state->smb1.recv_iov[2] = cur[1];
2028
2029 tevent_req_done(req);
2030 }
2031
2032 return NT_STATUS_RETRY;
2033 }
2034
2035 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2036 TALLOC_CTX *mem_ctx,
2037 struct iovec **piov,
2038 uint8_t **phdr,
2039 uint8_t *pwct,
2040 uint16_t **pvwv,
2041 uint32_t *pvwv_offset,
2042 uint32_t *pnum_bytes,
2043 uint8_t **pbytes,
2044 uint32_t *pbytes_offset,
2045 uint8_t **pinbuf,
2046 const struct smb1cli_req_expected_response *expected,
2047 size_t num_expected)
2048 {
2049 struct smbXcli_req_state *state =
2050 tevent_req_data(req,
2051 struct smbXcli_req_state);
2052 NTSTATUS status = NT_STATUS_OK;
2053 struct iovec *recv_iov = NULL;
2054 uint8_t *hdr = NULL;
2055 uint8_t wct = 0;
2056 uint32_t vwv_offset = 0;
2057 uint16_t *vwv = NULL;
2058 uint32_t num_bytes = 0;
2059 uint32_t bytes_offset = 0;
2060 uint8_t *bytes = NULL;
2061 size_t i;
2062 bool found_status = false;
2063 bool found_size = false;
2064
2065 if (piov != NULL) {
2066 *piov = NULL;
2067 }
2068 if (phdr != NULL) {
2069 *phdr = 0;
2070 }
2071 if (pwct != NULL) {
2072 *pwct = 0;
2073 }
2074 if (pvwv != NULL) {
2075 *pvwv = NULL;
2076 }
2077 if (pvwv_offset != NULL) {
2078 *pvwv_offset = 0;
2079 }
2080 if (pnum_bytes != NULL) {
2081 *pnum_bytes = 0;
2082 }
2083 if (pbytes != NULL) {
2084 *pbytes = NULL;
2085 }
2086 if (pbytes_offset != NULL) {
2087 *pbytes_offset = 0;
2088 }
2089 if (pinbuf != NULL) {
2090 *pinbuf = NULL;
2091 }
2092
2093 if (state->inbuf != NULL) {
2094 recv_iov = state->smb1.recv_iov;
2095 state->smb1.recv_iov = NULL;
2096 if (state->smb1.recv_cmd != SMBreadBraw) {
2097 hdr = (uint8_t *)recv_iov[0].iov_base;
2098 wct = recv_iov[1].iov_len/2;
2099 vwv = (uint16_t *)recv_iov[1].iov_base;
2100 vwv_offset = PTR_DIFF(vwv, hdr);
2101 num_bytes = recv_iov[2].iov_len;
2102 bytes = (uint8_t *)recv_iov[2].iov_base;
2103 bytes_offset = PTR_DIFF(bytes, hdr);
2104 }
2105 }
2106
2107 if (tevent_req_is_nterror(req, &status)) {
2108 for (i=0; i < num_expected; i++) {
2109 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2110 found_status = true;
2111 break;
2112 }
2113 }
2114
2115 if (found_status) {
2116 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2117 }
2118
2119 return status;
2120 }
2121
2122 if (num_expected == 0) {
2123 found_status = true;
2124 found_size = true;
2125 }
2126
2127 status = state->smb1.recv_status;
2128
2129 for (i=0; i < num_expected; i++) {
2130 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2131 continue;
2132 }
2133
2134 found_status = true;
2135 if (expected[i].wct == 0) {
2136 found_size = true;
2137 break;
2138 }
2139
2140 if (expected[i].wct == wct) {
2141 found_size = true;
2142 break;
2143 }
2144 }
2145
2146 if (!found_status) {
2147 return status;
2148 }
2149
2150 if (!found_size) {
2151 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2152 }
2153
2154 if (piov != NULL) {
2155 *piov = talloc_move(mem_ctx, &recv_iov);
2156 }
2157
2158 if (phdr != NULL) {
2159 *phdr = hdr;
2160 }
2161 if (pwct != NULL) {
2162 *pwct = wct;
2163 }
2164 if (pvwv != NULL) {
2165 *pvwv = vwv;
2166 }
2167 if (pvwv_offset != NULL) {
2168 *pvwv_offset = vwv_offset;
2169 }
2170 if (pnum_bytes != NULL) {
2171 *pnum_bytes = num_bytes;
2172 }
2173 if (pbytes != NULL) {
2174 *pbytes = bytes;
2175 }
2176 if (pbytes_offset != NULL) {
2177 *pbytes_offset = bytes_offset;
2178 }
2179 if (pinbuf != NULL) {
2180 *pinbuf = state->inbuf;
2181 }
2182
2183 return status;
2184 }
2185
2186 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2187 {
2188 size_t wct_ofs;
2189 int i;
2190
2191 wct_ofs = HDR_WCT;
2192
2193 for (i=0; i<num_reqs; i++) {
2194 struct smbXcli_req_state *state;
2195 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2196 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2197 state->smb1.iov_count-2);
2198 wct_ofs = (wct_ofs + 3) & ~3;
2199 }
2200 return wct_ofs;
2201 }
2202
2203 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2204 {
2205 struct smbXcli_req_state *first_state =
2206 tevent_req_data(reqs[0],
2207 struct smbXcli_req_state);
2208 struct smbXcli_req_state *state;
2209 size_t wct_offset;
2210 size_t chain_padding = 0;
2211 int i, iovlen;
2212 struct iovec *iov = NULL;
2213 struct iovec *this_iov;
2214 NTSTATUS status;
2215 size_t nbt_len;
2216
2217 if (num_reqs == 1) {
2218 return smb1cli_req_writev_submit(reqs[0], first_state,
2219 first_state->smb1.iov,
2220 first_state->smb1.iov_count);
2221 }
2222
2223 iovlen = 0;
2224 for (i=0; i<num_reqs; i++) {
2225 if (!tevent_req_is_in_progress(reqs[i])) {
2226 return NT_STATUS_INTERNAL_ERROR;
2227 }
2228
2229 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2230
2231 if (state->smb1.iov_count < 4) {
2232 return NT_STATUS_INVALID_PARAMETER_MIX;
2233 }
2234
2235 if (i == 0) {
2236 /*
2237 * The NBT and SMB header
2238 */
2239 iovlen += 2;
2240 } else {
2241 /*
2242 * Chain padding
2243 */
2244 iovlen += 1;
2245 }
2246
2247 /*
2248 * words and bytes
2249 */
2250 iovlen += state->smb1.iov_count - 2;
2251 }
2252
2253 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2254 if (iov == NULL) {
2255 return NT_STATUS_NO_MEMORY;
2256 }
2257
2258 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2259 first_state, reqs, sizeof(*reqs) * num_reqs);
2260 if (first_state->smb1.chained_requests == NULL) {
2261 TALLOC_FREE(iov);
2262 return NT_STATUS_NO_MEMORY;
2263 }
2264
2265 wct_offset = HDR_WCT;
2266 this_iov = iov;
2267
2268 for (i=0; i<num_reqs; i++) {
2269 size_t next_padding = 0;
2270 uint16_t *vwv;
2271
2272 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2273
2274 if (i < num_reqs-1) {
2275 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2276 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2277 TALLOC_FREE(iov);
2278 TALLOC_FREE(first_state->smb1.chained_requests);
2279 return NT_STATUS_INVALID_PARAMETER_MIX;
2280 }
2281 }
2282
2283 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2284 state->smb1.iov_count-2) + 1;
2285 if ((wct_offset % 4) != 0) {
2286 next_padding = 4 - (wct_offset % 4);
2287 }
2288 wct_offset += next_padding;
2289 vwv = state->smb1.vwv;
2290
2291 if (i < num_reqs-1) {
2292 struct smbXcli_req_state *next_state =
2293 tevent_req_data(reqs[i+1],
2294 struct smbXcli_req_state);
2295 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2296 SCVAL(vwv+0, 1, 0);
2297 SSVAL(vwv+1, 0, wct_offset);
2298 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2299 /* properly end the chain */
2300 SCVAL(vwv+0, 0, 0xff);
2301 SCVAL(vwv+0, 1, 0xff);
2302 SSVAL(vwv+1, 0, 0);
2303 }
2304
2305 if (i == 0) {
2306 /*
2307 * The NBT and SMB header
2308 */
2309 this_iov[0] = state->smb1.iov[0];
2310 this_iov[1] = state->smb1.iov[1];
2311 this_iov += 2;
2312 } else {
2313 /*
2314 * This one is a bit subtle. We have to add
2315 * chain_padding bytes between the requests, and we
2316 * have to also include the wct field of the
2317 * subsequent requests. We use the subsequent header
2318 * for the padding, it contains the wct field in its
2319 * last byte.
2320 */
2321 this_iov[0].iov_len = chain_padding+1;
2322 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2323 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2324 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2325 this_iov += 1;
2326 }
2327
2328 /*
2329 * copy the words and bytes
2330 */
2331 memcpy(this_iov, state->smb1.iov+2,
2332 sizeof(struct iovec) * (state->smb1.iov_count-2));
2333 this_iov += state->smb1.iov_count - 2;
2334 chain_padding = next_padding;
2335 }
2336
2337 nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
2338 if (nbt_len > first_state->conn->smb1.max_xmit) {
2339 TALLOC_FREE(iov);
2340 TALLOC_FREE(first_state->smb1.chained_requests);
2341 return NT_STATUS_INVALID_PARAMETER_MIX;
2342 }
2343
2344 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2345 if (!NT_STATUS_IS_OK(status)) {
2346 TALLOC_FREE(iov);
2347 TALLOC_FREE(first_state->smb1.chained_requests);
2348 return status;
2349 }
2350
2351 return NT_STATUS_OK;
2352 }
2353
2354 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2355 {
2356 return ((tevent_queue_length(conn->outgoing) != 0)
2357 || (talloc_array_length(conn->pending) != 0));
2358 }
2359
2360 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2361 {
2362 return conn->smb2.server.capabilities;
2363 }
2364
2365 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2366 {
2367 return conn->smb2.server.security_mode;
2368 }
2369
2370 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2371 {
2372 return conn->smb2.server.max_trans_size;
2373 }
2374
2375 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2376 {
2377 return conn->smb2.server.max_read_size;
2378 }
2379
2380 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2381 {
2382 return conn->smb2.server.max_write_size;
2383 }
2384
2385 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2386 uint16_t max_credits)
2387 {
2388 conn->smb2.max_credits = max_credits;
2389 }
2390
2391 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2392
2393 static bool smb2cli_req_cancel(struct tevent_req *req)
2394 {
2395 struct smbXcli_req_state *state =
2396 tevent_req_data(req,
2397 struct smbXcli_req_state);
2398 uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2399 uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2400 uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
2401 struct smbXcli_tcon *tcon = state->tcon;
2402 struct smbXcli_session *session = state->session;
2403 uint8_t *fixed = state->smb2.pad;
2404 uint16_t fixed_len = 4;
2405 struct tevent_req *subreq;
2406 struct smbXcli_req_state *substate;
2407 NTSTATUS status;
2408
2409 SSVAL(fixed, 0, 0x04);
2410 SSVAL(fixed, 2, 0);
2411
2412 subreq = smb2cli_req_create(state, state->ev,
2413 state->conn,
2414 SMB2_OP_CANCEL,
2415 flags, 0,
2416 0, /* timeout */
2417 tcon, session,
2418 fixed, fixed_len,
2419 NULL, 0);
2420 if (subreq == NULL) {
2421 return false;
2422 }
2423 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2424
2425 if (flags & SMB2_HDR_FLAG_ASYNC) {
2426 mid = 0;
2427 }
2428
2429 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
2430 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2431 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
2432
2433 status = smb2cli_req_compound_submit(&subreq, 1);
2434 if (!NT_STATUS_IS_OK(status)) {
2435 TALLOC_FREE(subreq);
2436 return false;
2437 }
2438
2439 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2440
2441 return true;
2442 }
2443
2444 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2445 {
2446 /* we do not care about the result */
2447 TALLOC_FREE(subreq);
2448 }
2449
2450 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2451 struct tevent_context *ev,
2452 struct smbXcli_conn *conn,
2453 uint16_t cmd,
2454 uint32_t additional_flags,
2455 uint32_t clear_flags,
2456 uint32_t timeout_msec,
2457 struct smbXcli_tcon *tcon,
2458 struct smbXcli_session *session,
2459 const uint8_t *fixed,
2460 uint16_t fixed_len,
2461 const uint8_t *dyn,
2462 uint32_t dyn_len)
2463 {
2464 struct tevent_req *req;
2465 struct smbXcli_req_state *state;
2466 uint32_t flags = 0;
2467 uint32_t tid = 0;
2468 uint64_t uid = 0;
2469 bool use_channel_sequence = false;
2470 uint16_t channel_sequence = 0;
2471
2472 req = tevent_req_create(mem_ctx, &state,
2473 struct smbXcli_req_state);
2474 if (req == NULL) {
2475 return NULL;
2476 }
2477
2478 state->ev = ev;
2479 state->conn = conn;
2480 state->session = session;
2481 state->tcon = tcon;
2482
2483 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2484 use_channel_sequence = true;
2485 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2486 use_channel_sequence = true;
2487 }
2488
2489 if (session) {
2490 uid = session->smb2->session_id;
2491
2492 if (use_channel_sequence) {
2493 channel_sequence = session->smb2->channel_sequence;
2494 }
2495
2496 state->smb2.should_sign = session->smb2->should_sign;
2497 state->smb2.should_encrypt = session->smb2->should_encrypt;
2498
2499 if (cmd == SMB2_OP_SESSSETUP &&
2500 session->smb2->signing_key.length != 0) {
2501 state->smb2.should_sign = true;
2502 }
2503
2504 if (cmd == SMB2_OP_SESSSETUP &&
2505 session->smb2_channel.signing_key.length == 0) {
2506 state->smb2.should_encrypt = false;
2507 }
2508 }
2509
2510 if (tcon) {
2511 tid = tcon->smb2.tcon_id;
2512
2513 if (tcon->smb2.should_encrypt) {
2514 state->smb2.should_encrypt = true;
2515 }
2516 }
2517
2518 if (state->smb2.should_encrypt) {
2519 state->smb2.should_sign = false;
2520 }
2521
2522 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2523 if (state->smb2.recv_iov == NULL) {
2524 TALLOC_FREE(req);
2525 return NULL;
2526 }
2527
2528 flags |= additional_flags;
2529 flags &= ~clear_flags;
2530
2531 state->smb2.fixed = fixed;
2532 state->smb2.fixed_len = fixed_len;
2533 state->smb2.dyn = dyn;
2534 state->smb2.dyn_len = dyn_len;
2535
2536 if (state->smb2.should_encrypt) {
2537 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2538 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2539 }
2540
2541 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
2542 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
2543 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
2544 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
2545 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
2546 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
2547 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
2548 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
2549
2550 switch (cmd) {
2551 case SMB2_OP_CANCEL:
2552 state->one_way = true;
2553 break;
2554 case SMB2_OP_BREAK:
2555 /*
2556 * If this is a dummy request, it will have
2557 * UINT64_MAX as message id.
2558 * If we send on break acknowledgement,
2559 * this gets overwritten later.
2560 */
2561 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2562 break;
2563 }
2564
2565 if (timeout_msec > 0) {
2566 struct timeval endtime;
2567
2568 endtime = timeval_current_ofs_msec(timeout_msec);
2569 if (!tevent_req_set_endtime(req, ev, endtime)) {
2570 return req;
2571 }
2572 }
2573
2574 return req;
2575 }
2576
2577 void smb2cli_req_set_notify_async(struct tevent_req *req)
2578 {
2579 struct smbXcli_req_state *state =
2580 tevent_req_data(req,
2581 struct smbXcli_req_state);
2582
2583 state->smb2.notify_async = true;
2584 }
2585
2586 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2587 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2588 TALLOC_CTX *tmp_mem,
2589 uint8_t *inbuf);
2590
2591 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2592 int num_reqs)
2593 {
2594 struct smbXcli_req_state *state;
2595 struct tevent_req *subreq;
2596 struct iovec *iov;
2597 int i, num_iov, nbt_len;
2598
2599 /*
2600 * 1 for the nbt length
2601 * per request: TRANSFORM, HDR, fixed, dyn, padding
2602 * -1 because the last one does not need padding
2603 */
2604
2605 iov = talloc_array(reqs[0], struct iovec, 1 + 5*num_reqs - 1);
2606 if (iov == NULL) {
2607 return NT_STATUS_NO_MEMORY;
2608 }
2609
2610 num_iov = 1;
2611 nbt_len = 0;
2612
2613 for (i=0; i<num_reqs; i++) {
2614 int tf_iov;
2615 int hdr_iov;
2616 size_t reqlen;
2617 bool ret;
2618 uint16_t opcode;
2619 uint64_t avail;
2620 uint16_t charge;
2621 uint16_t credits;
2622 uint64_t mid;
2623 const DATA_BLOB *signing_key = NULL;
2624 const DATA_BLOB *encryption_key = NULL;
2625
2626 if (!tevent_req_is_in_progress(reqs[i])) {
2627 return NT_STATUS_INTERNAL_ERROR;
2628 }
2629
2630 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2631
2632 if (!smbXcli_conn_is_connected(state->conn)) {
2633 return NT_STATUS_CONNECTION_DISCONNECTED;
2634 }
2635
2636 if ((state->conn->protocol != PROTOCOL_NONE) &&
2637 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2638 return NT_STATUS_REVISION_MISMATCH;
2639 }
2640
2641 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2642 if (opcode == SMB2_OP_CANCEL) {
2643 goto skip_credits;
2644 }
2645
2646 avail = UINT64_MAX - state->conn->smb2.mid;
2647 if (avail < 1) {
2648 return NT_STATUS_CONNECTION_ABORTED;
2649 }
2650
2651 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2652 charge = (MAX(state->smb2.dyn_len, 1) - 1)/ 65536 + 1;
2653 } else {
2654 charge = 1;
2655 }
2656
2657 charge = MAX(state->smb2.credit_charge, charge);
2658
2659 avail = MIN(avail, state->conn->smb2.cur_credits);
2660 if (avail < charge) {
2661 return NT_STATUS_INTERNAL_ERROR;
2662 }
2663
2664 credits = 0;
2665 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
2666 credits = state->conn->smb2.max_credits -
2667 state->conn->smb2.cur_credits;
2668 }
2669 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
2670 credits += 1;
2671 }
2672
2673 mid = state->conn->smb2.mid;
2674 state->conn->smb2.mid += charge;
2675 state->conn->smb2.cur_credits -= charge;
2676
2677 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2678 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
2679 }
2680 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
2681 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2682
2683 skip_credits:
2684 if (state->session) {
2685 /*
2686 * We prefer the channel signing key if it is
2687 * already there.
2688 */
2689 if (state->smb2.should_sign) {
2690 signing_key = &state->session->smb2_channel.signing_key;
2691 }
2692
2693 /*
2694 * If it is a channel binding, we already have the main
2695 * signing key and try that one.
2696 */
2697 if (signing_key && signing_key->length == 0) {
2698 signing_key = &state->session->smb2->signing_key;
2699 }
2700
2701 /*
2702 * If we do not have any session key yet, we skip the
2703 * signing of SMB2_OP_SESSSETUP requests.
2704 */
2705 if (signing_key && signing_key->length == 0) {
2706 signing_key = NULL;
2707 }
2708
2709 if (state->smb2.should_encrypt) {
2710 encryption_key = &state->session->smb2->encryption_key;
2711 }
2712 }
2713
2714 if (encryption_key) {
2715 tf_iov = num_iov;
2716 iov[num_iov].iov_base = state->smb2.transform;
2717 iov[num_iov].iov_len = sizeof(state->smb2.transform);
2718 num_iov += 1;
2719 }
2720
2721 hdr_iov = num_iov;
2722 iov[num_iov].iov_base = state->smb2.hdr;
2723 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
2724 num_iov += 1;
2725
2726 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2727 iov[num_iov].iov_len = state->smb2.fixed_len;
2728 num_iov += 1;
2729
2730 if (state->smb2.dyn != NULL) {
2731 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2732 iov[num_iov].iov_len = state->smb2.dyn_len;
2733 num_iov += 1;
2734 }
2735
2736 reqlen = sizeof(state->smb2.hdr);
2737 reqlen += state->smb2.fixed_len;
2738 reqlen += state->smb2.dyn_len;
2739
2740 if (i < num_reqs-1) {
2741 if ((reqlen % 8) > 0) {
2742 uint8_t pad = 8 - (reqlen % 8);
2743 iov[num_iov].iov_base = state->smb2.pad;
2744 iov[num_iov].iov_len = pad;
2745 num_iov += 1;
2746 reqlen += pad;
2747 }
2748 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
2749 }
2750
2751 if (encryption_key) {
2752 NTSTATUS status;
2753 uint8_t *buf;
2754 int vi;
2755
2756 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
2757 state->session->smb2->nonce_low);
2758 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
2759 state->session->smb2->nonce_high);
2760
2761 state->session->smb2->nonce_low += 1;
2762 if (state->session->smb2->nonce_low == 0) {
2763 state->session->smb2->nonce_high += 1;
2764 state->session->smb2->nonce_low += 1;
2765 }
2766
2767 SBVAL(state->smb2.transform, SMB2_TF_MSG_SIZE,
2768 reqlen);
2769
2770 buf = talloc_array(iov, uint8_t, reqlen);
2771 if (buf == NULL) {
2772 return NT_STATUS_NO_MEMORY;
2773 }
2774
2775 reqlen += SMB2_TF_HDR_SIZE;
2776
2777 /*
2778 * We copy the buffers before encrypting them,
2779 * this is at least currently needed for the
2780 * to keep state->smb2.hdr.
2781 *
2782 * Also the callers may expect there buffers
2783 * to be const.
2784 */
2785 for (vi = hdr_iov; vi < num_iov; vi++) {
2786 struct iovec *v = &iov[vi];
2787 const uint8_t *o = (const uint8_t *)v->iov_base;
2788
2789 memcpy(buf, o, v->iov_len);
2790 v->iov_base = (void *)buf;
2791 buf += v->iov_len;
2792 }
2793
2794 status = smb2_signing_encrypt_pdu(*encryption_key,
2795 state->session->conn->protocol,
2796 &iov[tf_iov], num_iov - tf_iov);
2797 if (!NT_STATUS_IS_OK(status)) {
2798 return status;
2799 }
2800 } else if (signing_key) {
2801 NTSTATUS status;
2802
2803 status = smb2_signing_sign_pdu(*signing_key,
2804 state->session->conn->protocol,
2805 &iov[hdr_iov], num_iov - hdr_iov);
2806 if (!NT_STATUS_IS_OK(status)) {
2807 return status;
2808 }
2809 }
2810
2811 nbt_len += reqlen;
2812
2813 ret = smbXcli_req_set_pending(reqs[i]);
2814 if (!ret) {
2815 return NT_STATUS_NO_MEMORY;
2816 }
2817 }
2818
2819 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
2820 _smb_setlen_tcp(state->length_hdr, nbt_len);
2821 iov[0].iov_base = state->length_hdr;
2822 iov[0].iov_len = sizeof(state->length_hdr);
2823
2824 if (state->conn->dispatch_incoming == NULL) {
2825 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
2826 }
2827
2828 subreq = writev_send(state, state->ev, state->conn->outgoing,
2829 state->conn->write_fd, false, iov, num_iov);
2830 if (subreq == NULL) {
2831 return NT_STATUS_NO_MEMORY;
2832 }
2833 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
2834 return NT_STATUS_OK;
2835 }
2836
2837 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
2838 {
2839 struct smbXcli_req_state *state =
2840 tevent_req_data(req,
2841 struct smbXcli_req_state);
2842
2843 state->smb2.credit_charge = charge;
2844 }
2845
2846 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
2847 struct tevent_context *ev,
2848 struct smbXcli_conn *conn,
2849 uint16_t cmd,
2850 uint32_t additional_flags,
2851 uint32_t clear_flags,
2852 uint32_t timeout_msec,
2853 struct smbXcli_tcon *tcon,
2854 struct smbXcli_session *session,
2855 const uint8_t *fixed,
2856 uint16_t fixed_len,
2857 const uint8_t *dyn,
2858 uint32_t dyn_len)
2859 {
2860 struct tevent_req *req;
2861 NTSTATUS status;
2862
2863 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
2864 additional_flags, clear_flags,
2865 timeout_msec,
2866 tcon, session,
2867 fixed, fixed_len, dyn, dyn_len);
2868 if (req == NULL) {
2869 return NULL;
2870 }
2871 if (!tevent_req_is_in_progress(req)) {
2872 return tevent_req_post(req, ev);
2873 }
2874 status = smb2cli_req_compound_submit(&req, 1);
2875 if (tevent_req_nterror(req, status)) {
2876 return tevent_req_post(req, ev);
2877 }
2878 return req;
2879 }
2880
2881 static void smb2cli_req_writev_done(struct tevent_req *subreq)
2882 {
2883 struct tevent_req *req =
2884 tevent_req_callback_data(subreq,
2885 struct tevent_req);
2886 struct smbXcli_req_state *state =
2887 tevent_req_data(req,
2888 struct smbXcli_req_state);
2889 ssize_t nwritten;
2890 int err;
2891
2892 nwritten = writev_recv(subreq, &err);
2893 TALLOC_FREE(subreq);
2894 if (nwritten == -1) {
2895 /* here, we need to notify all pending requests */
2896 NTSTATUS status = map_nt_error_from_unix_common(err);
2897 smbXcli_conn_disconnect(state->conn, status);
2898 return;
2899 }
2900 }
2901
2902 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
2903 uint8_t *buf,
2904 size_t buflen,
2905 TALLOC_CTX *mem_ctx,
2906 struct iovec **piov, int *pnum_iov)
2907 {
2908 struct iovec *iov;
2909 int num_iov = 0;
2910 size_t taken = 0;
2911 uint8_t *first_hdr = buf;
2912
2913 iov = talloc_array(mem_ctx, struct iovec, num_iov);
2914 if (iov == NULL) {
2915 return NT_STATUS_NO_MEMORY;
2916 }
2917
2918 while (taken < buflen) {
2919 uint8_t *tf = NULL;
2920 size_t tf_len = 0;
2921 size_t len = buflen - taken;
2922 uint8_t *hdr = first_hdr + taken;
2923 struct iovec *cur;
2924 size_t full_size;
2925 size_t next_command_ofs;
2926 uint16_t body_size;
2927 struct iovec *iov_tmp;
2928
2929 if (len < 4) {
2930 DEBUG(10, ("%d bytes left, expected at least %d\n",
2931 (int)len, 4));
2932 goto inval;
2933 }
2934 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
2935 struct smbXcli_session *s;
2936 uint64_t uid;
2937 struct iovec tf_iov[2];
2938 NTSTATUS status;
2939
2940 if (len < SMB2_TF_HDR_SIZE) {
2941 DEBUG(10, ("%d bytes left, expected at least %d\n",
2942 (int)len, SMB2_TF_HDR_SIZE));
2943 goto inval;
2944 }
2945 tf = hdr;
2946 tf_len = SMB2_TF_HDR_SIZE;
2947 taken += tf_len;
2948
2949 hdr = first_hdr + taken;
2950 len = IVAL(tf, SMB2_TF_MSG_SIZE);
2951 uid = BVAL(tf, SMB2_TF_SESSION_ID);
2952
2953 s = conn->sessions;
2954 for (; s; s = s->next) {
2955 if (s->smb2->session_id != uid) {
2956 continue;
2957 }
2958 break;
2959 }
2960
2961 if (s == NULL) {
2962 DEBUG(10, ("unknown session_id %llu\n",
2963 (unsigned long long)uid));
2964 goto inval;
2965 }
2966
2967 tf_iov[0].iov_base = (void *)tf;
2968 tf_iov[0].iov_len = tf_len;
2969 tf_iov[1].iov_base = (void *)hdr;
2970 tf_iov[1].iov_len = len;
2971
2972 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
2973 conn->protocol,
2974 tf_iov, 2);
2975 if (!NT_STATUS_IS_OK(status)) {
2976 TALLOC_FREE(iov);
2977 return status;
2978 }
2979 }
2980
2981 /*
2982 * We need the header plus the body length field
2983 */
2984
2985 if (len < SMB2_HDR_BODY + 2) {
2986 DEBUG(10, ("%d bytes left, expected at least %d\n",
2987 (int)len, SMB2_HDR_BODY));
2988 goto inval;
2989 }
2990 if (IVAL(hdr, 0) != SMB2_MAGIC) {
2991 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
2992 IVAL(hdr, 0)));
2993 goto inval;
2994 }
2995 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
2996 DEBUG(10, ("Got HDR len %d, expected %d\n",
2997 SVAL(hdr, 4), SMB2_HDR_BODY));
2998 goto inval;
2999 }
3000
3001 full_size = len;
3002 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3003 body_size = SVAL(hdr, SMB2_HDR_BODY);
3004
3005 if (next_command_ofs != 0) {
3006 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3007 goto inval;
3008 }
3009 if (next_command_ofs > full_size) {
3010 goto inval;
3011 }
3012 if (tf && next_command_ofs < len) {
3013 goto inval;
3014 }
3015 full_size = next_command_ofs;
3016 }
3017 if (body_size < 2) {
3018 goto inval;
3019 }
3020 body_size &= 0xfffe;
3021
3022 if (body_size > (full_size - SMB2_HDR_BODY)) {
3023 goto inval;
3024 }
3025
3026 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3027 num_iov + 4);
3028 if (iov_tmp == NULL) {
3029 TALLOC_FREE(iov);
3030 return NT_STATUS_NO_MEMORY;
3031 }
3032 iov = iov_tmp;
3033 cur = &iov[num_iov];
3034 num_iov += 4;
3035
3036 cur[0].iov_base = tf;
3037 cur[0].iov_len = tf_len;
3038 cur[1].iov_base = hdr;
3039 cur[1].iov_len = SMB2_HDR_BODY;
3040 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3041 cur[2].iov_len = body_size;
3042 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3043 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3044
3045 taken += full_size;
3046 }
3047
3048 *piov = iov;
3049 *pnum_iov = num_iov;
3050 return NT_STATUS_OK;
3051
3052 inval:
3053 TALLOC_FREE(iov);
3054 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3055 }
3056
3057 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3058 uint64_t mid)
3059 {
3060 size_t num_pending = talloc_array_length(conn->pending);
3061 size_t i;
3062
3063 for (i=0; i<num_pending; i++) {
3064 struct tevent_req *req = conn->pending[i];
3065 struct smbXcli_req_state *state =
3066 tevent_req_data(req,
3067 struct smbXcli_req_state);
3068
3069 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3070 return req;
3071 }
3072 }
3073 return NULL;
3074 }
3075
3076 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3077 TALLOC_CTX *tmp_mem,
3078 uint8_t *inbuf)
3079 {
3080 struct tevent_req *req;
3081 struct smbXcli_req_state *state = NULL;
3082 struct iovec *iov;
3083 int i, num_iov;
3084 NTSTATUS status;
3085 bool defer = true;
3086 struct smbXcli_session *last_session = NULL;
3087 size_t inbuf_len = smb_len_tcp(inbuf);
3088
3089 status = smb2cli_inbuf_parse_compound(conn,
3090 inbuf + NBT_HDR_SIZE,
3091 inbuf_len,
3092 tmp_mem,
3093 &iov, &num_iov);
3094 if (!NT_STATUS_IS_OK(status)) {
3095 return status;
3096 }
3097
3098 for (i=0; i<num_iov; i+=4) {
3099 uint8_t *inbuf_ref = NULL;
3100 struct iovec *cur = &iov[i];
3101 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3102 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3103 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3104 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3105 uint16_t req_opcode;
3106 uint32_t req_flags;
3107 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3108 uint32_t new_credits;
3109 struct smbXcli_session *session = NULL;
3110 const DATA_BLOB *signing_key = NULL;
3111
3112 new_credits = conn->smb2.cur_credits;
3113 new_credits += credits;
3114 if (new_credits > UINT16_MAX) {
3115 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3116 }
3117 conn->smb2.cur_credits += credits;
3118
3119 req = smb2cli_conn_find_pending(conn, mid);
3120 if (req == NULL) {
3121 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3122 }
3123 state = tevent_req_data(req, struct smbXcli_req_state);
3124
3125 state->smb2.got_async = false;
3126
3127 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3128 if (opcode != req_opcode) {
3129 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3130 }
3131 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3132
3133 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3134 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3135 }
3136
3137 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3138 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3139 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3140 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3141
3142 /*
3143 * async interim responses are not signed,
3144 * even if the SMB2_HDR_FLAG_SIGNED flag
3145 * is set.
3146 */
3147 req_flags |= SMB2_HDR_FLAG_ASYNC;
3148 SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
3149 SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
3150
3151 if (state->smb2.notify_async) {
3152 state->smb2.got_async = true;
3153 tevent_req_defer_callback(req, state->ev);
3154 tevent_req_notify_callback(req);
3155 }
3156 continue;
3157 }
3158
3159 session = state->session;
3160 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3161 session = last_session;
3162 }
3163 last_session = session;
3164
3165 if (state->smb2.should_sign) {
3166 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3167 return NT_STATUS_ACCESS_DENIED;
3168 }
3169 }
3170
3171 if (flags & SMB2_HDR_FLAG_SIGNED) {
3172 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3173
3174 if (session == NULL) {
3175 struct smbXcli_session *s;
3176
3177 s = state->conn->sessions;
3178 for (; s; s = s->next) {
3179 if (s->smb2->session_id != uid) {
3180 continue;
3181 }
3182
3183 session = s;
3184 break;
3185 }
3186 }
3187
3188 if (session == NULL) {
3189 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3190 }
3191
3192 last_session = session;
3193 signing_key = &session->smb2_channel.signing_key;
3194 }
3195
3196 if (opcode == SMB2_OP_SESSSETUP) {
3197 /*
3198 * We prefer the channel signing key, if it is
3199 * already there.
3200 *
3201 * If we do not have a channel signing key yet,
3202 * we try the main signing key, if it is not
3203 * the final response.
3204 */
3205 if (signing_key && signing_key->length == 0 &&
3206 !NT_STATUS_IS_OK(status)) {
3207 signing_key = &session->smb2->signing_key;
3208 }
3209
3210 if (signing_key && signing_key->length == 0) {
3211 /*
3212 * If we do not have a session key to
3213 * verify the signature, we defer the
3214 * signing check to the caller.
3215 *
3216 * The caller gets NT_STATUS_OK, it
3217 * has to call
3218 * smb2cli_session_set_session_key()
3219 * or
3220 * smb2cli_session_set_channel_key()
3221 * which will check the signature
3222 * with the channel signing key.
3223 */
3224 signing_key = NULL;
3225 }
3226 }
3227
3228 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3229 /*
3230 * if the server returns NT_STATUS_USER_SESSION_DELETED
3231 * the response is not signed and we should
3232 * propagate the NT_STATUS_USER_SESSION_DELETED
3233 * status to the caller.
3234 */
3235 signing_key = NULL;
3236 } else if (state->smb2.should_encrypt) {
3237 if (cur[0].iov_len != SMB2_TF_HDR_SIZE) {
3238 return NT_STATUS_ACCESS_DENIED;
3239 }
3240 }
3241
3242 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3243 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3244 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3245 /*
3246 * if the server returns
3247 * NT_STATUS_NETWORK_NAME_DELETED
3248 * NT_STATUS_FILE_CLOSED
3249 * NT_STATUS_INVALID_PARAMETER
3250 * the response might not be signed
3251 * as this happens before the signing checks.
3252 *
3253 * If server echos the signature (or all zeros)
3254 * we should report the status from the server
3255 * to the caller.
3256 */
3257 if (signing_key) {
3258 int cmp;
3259
3260 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3261 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3262 16);
3263 if (cmp == 0) {
3264 state->smb2.signing_skipped = true;
3265 signing_key = NULL;
3266 }
3267 }
3268 if (signing_key) {
3269 int cmp;
3270 static const uint8_t zeros[16];
3271
3272 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3273 zeros,
3274 16);
3275 if (cmp == 0) {
3276 state->smb2.signing_skipped = true;
3277 signing_key = NULL;
3278 }
3279 }
3280 }
3281
3282 if (signing_key) {
3283 status = smb2_signing_check_pdu(*signing_key,
3284 state->conn->protocol,
3285 &cur[1], 3);
3286 if (!NT_STATUS_IS_OK(status)) {
3287 /*
3288 * If the signing check fails, we disconnect
3289 * the connection.
3290 */
3291 return status;
3292 }
3293 }
3294
3295 smbXcli_req_unset_pending(req);
3296
3297 /*
3298 * There might be more than one response
3299 * we need to defer the notifications
3300 */
3301 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3302 defer = false;
3303 }
3304
3305 if (defer) {
3306 tevent_req_defer_callback(req, state->ev);
3307 }
3308
3309 /*
3310 * Note: here we use talloc_reference() in a way
3311 * that does not expose it to the caller.
3312 */
3313 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3314 if (tevent_req_nomem(inbuf_ref, req)) {
3315 continue;
3316 }
3317
3318 /* copy the related buffers */
3319 state->smb2.recv_iov[0] = cur[1];
3320 state->smb2.recv_iov[1] = cur[2];
3321 state->smb2.recv_iov[2] = cur[3];
3322
3323 tevent_req_done(req);
3324 }
3325
3326 if (defer) {
3327 return NT_STATUS_RETRY;
3328 }
3329
3330 return NT_STATUS_OK;
3331 }
3332
3333 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3334 struct iovec **piov,
3335 const struct smb2cli_req_expected_response *expected,
3336 size_t num_expected)
3337 {
3338 struct smbXcli_req_state *state =
3339 tevent_req_data(req,
3340 struct smbXcli_req_state);
3341 NTSTATUS status;
3342 size_t body_size;
3343 bool found_status = false;
3344 bool found_size = false;
3345 size_t i;
3346
3347 if (piov != NULL) {
3348 *piov = NULL;
3349 }
3350
3351 if (state->smb2.got_async) {
3352 return STATUS_PENDING;
3353 }
3354
3355 if (tevent_req_is_nterror(req, &status)) {
3356 for (i=0; i < num_expected; i++) {
3357 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3358 found_status = true;
3359 break;
3360 }
3361 }
3362
3363 if (found_status) {
3364 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3365 }
3366
3367 return status;
3368 }
3369
3370 if (num_expected == 0) {
3371 found_status = true;
3372 found_size = true;
3373 }
3374
3375 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3376 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3377
3378 for (i=0; i < num_expected; i++) {
3379 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3380 continue;
3381 }
3382
3383 found_status = true;
3384 if (expected[i].body_size == 0) {
3385 found_size = true;
3386 break;
3387 }
3388
3389 if (expected[i].body_size == body_size) {
3390 found_size = true;
3391 break;
3392 }
3393 }
3394
3395 if (!found_status) {
3396 return status;
3397 }
3398
3399 if (state->smb2.signing_skipped) {
3400 if (num_expected > 0) {
3401 return NT_STATUS_ACCESS_DENIED;
3402 }
3403 if (!NT_STATUS_IS_ERR(status)) {
3404 return NT_STATUS_ACCESS_DENIED;
3405 }
3406 }
3407
3408 if (!found_size) {
3409 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3410 }
3411
3412 if (piov != NULL) {
3413 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3414 }
3415
3416 return status;
3417 }
3418
3419 static const struct {
3420 enum protocol_types proto;
3421 const char *smb1_name;
3422 } smb1cli_prots[] = {
3423 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
3424 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
3425 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
3426 {PROTOCOL_LANMAN1, "LANMAN1.0"},
3427 {PROTOCOL_LANMAN2, "LM1.2X002"},
3428 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
3429 {PROTOCOL_LANMAN2, "LANMAN2.1"},
3430 {PROTOCOL_LANMAN2, "Samba"},
3431 {PROTOCOL_NT1, "NT LANMAN 1.0"},
3432 {PROTOCOL_NT1, "NT LM 0.12"},
3433 {PROTOCOL_SMB2_02, "SMB 2.002"},
3434 {PROTOCOL_SMB2_10, "SMB 2.???"},
3435 };
3436
3437 static const struct {
3438 enum protocol_types proto;
3439 uint16_t smb2_dialect;
3440 } smb2cli_prots[] = {
3441 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
3442 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
3443 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
3444 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
3445 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
3446 };
3447
3448 struct smbXcli_negprot_state {
3449 struct smbXcli_conn *conn;
3450 struct tevent_context *ev;
3451 uint32_t timeout_msec;
3452 enum protocol_types min_protocol;
3453 enum protocol_types max_protocol;
3454
3455 struct {
3456 uint8_t fixed[36];
3457 uint8_t dyn[ARRAY_SIZE(smb2cli_prots)*2];
3458 } smb2;
3459 };
3460
3461 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3462 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3463 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3464 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3465 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3466 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3467 TALLOC_CTX *frame,
3468 uint8_t *inbuf);
3469
3470 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3471 struct tevent_context *ev,
3472 struct smbXcli_conn *conn,
3473 uint32_t timeout_msec,
3474 enum protocol_types min_protocol,
3475 enum protocol_types max_protocol)
3476 {
3477 struct tevent_req *req, *subreq;
3478 struct smbXcli_negprot_state *state;
3479
3480 req = tevent_req_create(mem_ctx, &state,
3481 struct smbXcli_negprot_state);
3482 if (req == NULL) {
3483 return NULL;
3484 }
3485 state->conn = conn;
3486 state->ev = ev;
3487 state->timeout_msec = timeout_msec;
3488 state->min_protocol = min_protocol;
3489 state->max_protocol = max_protocol;
3490
3491 if (min_protocol == PROTOCOL_NONE) {
3492 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3493 return tevent_req_post(req, ev);
3494 }
3495
3496 if (max_protocol == PROTOCOL_NONE) {
3497 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3498 return tevent_req_post(req, ev);
3499 }
3500
3501 if (min_protocol > max_protocol) {
3502 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3503 return tevent_req_post(req, ev);
3504 }
3505
3506 if ((min_protocol < PROTOCOL_SMB2_02) &&
3507 (max_protocol < PROTOCOL_SMB2_02)) {
3508 /*
3509 * SMB1 only...
3510 */
3511 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
3512
3513 subreq = smbXcli_negprot_smb1_subreq(state);
3514 if (tevent_req_nomem(subreq, req)) {
3515 return tevent_req_post(req, ev);
3516 }
3517 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
3518 return req;
3519 }
3520
3521 if ((min_protocol >= PROTOCOL_SMB2_02) &&
3522 (max_protocol >= PROTOCOL_SMB2_02)) {
3523 /*
3524 * SMB2 only...
3525 */
3526 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3527
3528 subreq = smbXcli_negprot_smb2_subreq(state);
3529 if (tevent_req_nomem(subreq, req)) {
3530 return tevent_req_post(req, ev);
3531 }
3532 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
3533 return req;
3534 }
3535
3536 /*
3537 * We send an SMB1 negprot with the SMB2 dialects
3538 * and expect a SMB1 or a SMB2 response.
3539 *
3540 * smbXcli_negprot_dispatch_incoming() will fix the
3541 * callback to match protocol of the response.
3542 */
3543 conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
3544
3545 subreq = smbXcli_negprot_smb1_subreq(state);
3546 if (tevent_req_nomem(subreq, req)) {
3547 return tevent_req_post(req, ev);
3548 }
3549 tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
3550 return req;
3551 }
3552
3553 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
3554 {
3555 struct tevent_req *req =
3556 tevent_req_callback_data(subreq,
3557 struct tevent_req);
3558 NTSTATUS status;
3559
3560 /*
3561 * we just want the low level error
3562 */
3563 status = tevent_req_simple_recv_ntstatus(subreq);
3564 TALLOC_FREE(subreq);
3565 if (tevent_req_nterror(req, status)) {
3566 return;
3567 }
3568
3569 /* this should never happen */
3570 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
3571 }
3572
3573 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
3574 {
3575 size_t i;
3576 DATA_BLOB bytes = data_blob_null;
3577 uint8_t flags;
3578 uint16_t flags2;
3579
3580 /* setup the protocol strings */
3581 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3582 uint8_t c = 2;
3583 bool ok;
3584
3585 if (smb1cli_prots[i].proto < state->min_protocol) {
3586 continue;
3587 }
3588
3589 if (smb1cli_prots[i].proto > state->max_protocol) {
3590 continue;
3591 }
3592
3593 ok = data_blob_append(state, &bytes, &c, sizeof(c));
3594 if (!ok) {
3595 return NULL;
3596 }
3597
3598 /*
3599 * We now it is already ascii and
3600 * we want NULL termination.
3601 */
3602 ok = data_blob_append(state, &bytes,
3603 smb1cli_prots[i].smb1_name,
3604 strlen(smb1cli_prots[i].smb1_name)+1);
3605 if (!ok) {
3606 return NULL;
3607 }
3608 }
3609
3610 smb1cli_req_flags(state->max_protocol,
3611 state->conn->smb1.client.capabilities,
3612 SMBnegprot,
3613 0, 0, &flags,
3614 0, 0, &flags2);
3615
3616 return smb1cli_req_send(state, state->ev, state->conn,
3617 SMBnegprot,
3618 flags, ~flags,
3619 flags2, ~flags2,
3620 state->timeout_msec,
3621 0xFFFE, 0, NULL, /* pid, tid, session */
3622 0, NULL, /* wct, vwv */
3623 bytes.length, bytes.data);
3624 }
3625
3626 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
3627 {
3628 struct tevent_req *req =
3629 tevent_req_callback_data(subreq,
3630 struct tevent_req);
3631 struct smbXcli_negprot_state *state =
3632 tevent_req_data(req,
3633 struct smbXcli_negprot_state);
3634 struct smbXcli_conn *conn = state->conn;
3635 struct iovec *recv_iov = NULL;
3636 uint8_t *inhdr;
3637 uint8_t wct;
3638 uint16_t *vwv;
3639 uint32_t num_bytes;
3640 uint8_t *bytes;
3641 NTSTATUS status;
3642 uint16_t protnum;
3643 size_t i;
3644 size_t num_prots = 0;
3645 uint8_t flags;
3646 uint32_t client_capabilities = conn->smb1.client.capabilities;
3647 uint32_t both_capabilities;
3648 uint32_t server_capabilities = 0;
3649 uint32_t capabilities;
3650 uint32_t client_max_xmit = conn->smb1.client.max_xmit;
3651 uint32_t server_max_xmit = 0;
3652 uint32_t max_xmit;
3653 uint32_t server_max_mux = 0;
3654 uint16_t server_security_mode = 0;
3655 uint32_t server_session_key = 0;
3656 bool server_readbraw = false;
3657 bool server_writebraw = false;
3658 bool server_lockread = false;
3659 bool server_writeunlock = false;
3660 struct GUID server_guid = GUID_zero();
3661 DATA_BLOB server_gss_blob = data_blob_null;
3662 uint8_t server_challenge[8];
3663 char *server_workgroup = NULL;
3664 char *server_name = NULL;
3665 int server_time_zone = 0;
3666 NTTIME server_system_time = 0;
3667 static const struct smb1cli_req_expected_response expected[] = {
3668 {
3669 .status = NT_STATUS_OK,
3670 .wct = 0x11, /* NT1 */
3671 },
3672 {
3673 .status = NT_STATUS_OK,
3674 .wct = 0x0D, /* LM */
3675 },
3676 {
3677 .status = NT_STATUS_OK,
3678 .wct = 0x01, /* CORE */
3679 }
3680 };
3681
3682 ZERO_STRUCT(server_challenge);
3683
3684 status = smb1cli_req_recv(subreq, state,
3685 &recv_iov,
3686 &inhdr,
3687 &wct,
3688 &vwv,
3689 NULL, /* pvwv_offset */
3690 &num_bytes,
3691 &bytes,
3692 NULL, /* pbytes_offset */
3693 NULL, /* pinbuf */
3694 expected, ARRAY_SIZE(expected));
3695 TALLOC_FREE(subreq);
3696 if (tevent_req_nterror(req, status)) {
3697 return;
3698 }
3699
3700 flags = CVAL(inhdr, HDR_FLG);
3701
3702 protnum = SVAL(vwv, 0);
3703
3704 for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
3705 if (smb1cli_prots[i].proto < state->min_protocol) {
3706 continue;
3707 }
3708
3709 if (smb1cli_prots[i].proto > state->max_protocol) {
3710 continue;
3711 }
3712
3713 if (protnum != num_prots) {
3714 num_prots++;
3715 continue;
3716 }
3717
3718 conn->protocol = smb1cli_prots[i].proto;
3719 break;
3720 }
3721
3722 if (conn->protocol == PROTOCOL_NONE) {
3723 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3724 return;
3725 }
3726
3727 if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
3728 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
3729 "and the selected protocol level doesn't support it.\n"));
3730 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3731 return;
3732 }
3733
3734 if (flags & FLAG_SUPPORT_LOCKREAD) {
3735 server_lockread = true;
3736 server_writeunlock = true;
3737 }
3738
3739 if (conn->protocol >= PROTOCOL_NT1) {
3740 const char *client_signing = NULL;
3741 bool server_mandatory = false;
3742 bool server_allowed = false;
3743 const char *server_signing = NULL;
3744 bool ok;
3745 uint8_t key_len;
3746
3747 if (wct != 0x11) {
3748 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3749 return;
3750 }
3751
3752 /* NT protocol */
3753 server_security_mode = CVAL(vwv + 1, 0);
3754 server_max_mux = SVAL(vwv + 1, 1);
3755 server_max_xmit = IVAL(vwv + 3, 1);
3756 server_session_key = IVAL(vwv + 7, 1);
3757 server_time_zone = SVALS(vwv + 15, 1);
3758 server_time_zone *= 60;
3759 /* this time arrives in real GMT */
3760 server_system_time = BVAL(vwv + 11, 1);
3761 server_capabilities = IVAL(vwv + 9, 1);
3762
3763 key_len = CVAL(vwv + 16, 1);
3764
3765 if (server_capabilities & CAP_RAW_MODE) {
3766 server_readbraw = true;
3767 server_writebraw = true;
3768 }
3769 if (server_capabilities & CAP_LOCK_AND_READ) {
3770 server_lockread = true;
3771 }
3772
3773 if (server_capabilities & CAP_EXTENDED_SECURITY) {
3774 DATA_BLOB blob1, blob2;
3775
3776 if (num_bytes < 16) {
3777 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3778 return;
3779 }
3780
3781 blob1 = data_blob_const(bytes, 16);
3782 status = GUID_from_data_blob(&blob1, &server_guid);
3783 if (tevent_req_nterror(req, status)) {
3784 return;
3785 }
3786
3787 blob1 = data_blob_const(bytes+16, num_bytes-16);
3788 blob2 = data_blob_dup_talloc(state, blob1);
3789 if (blob1.length > 0 &&
3790 tevent_req_nomem(blob2.data, req)) {
3791 return;
3792 }
3793 server_gss_blob = blob2;
3794 } else {
3795 DATA_BLOB blob1, blob2;
3796
3797 if (num_bytes < key_len) {
3798 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3799 return;
3800 }
3801
3802 if (key_len != 0 && key_len != 8) {
3803 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3804 return;
3805 }
3806
3807 if (key_len == 8) {
3808 memcpy(server_challenge, bytes, 8);
3809 }
3810
3811 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
3812 blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
3813 if (blob1.length > 0) {
3814 size_t len;
3815
3816 len = utf16_len_n(blob1.data,
3817 blob1.length);
3818 blob1.length = len;
3819
3820 ok = convert_string_talloc(state,
3821 CH_UTF16LE,
3822 CH_UNIX,
3823 blob1.data,
3824 blob1.length,
3825 &server_workgroup,
3826 &len);
3827 if (!ok) {
3828 status = map_nt_error_from_unix_common(errno);
3829 tevent_req_nterror(req, status);
3830 return;
3831 }
3832 }
3833
3834 blob2.data += blob1.length;
3835 blob2.length -= blob1.length;
3836 if (blob2.length > 0) {
3837 size_t len;
3838
3839 len = utf16_len_n(blob1.data,
3840 blob1.length);
3841 blob1.length = len;
3842
3843 ok = convert_string_talloc(state,
3844 CH_UTF16LE,
3845 CH_UNIX,
3846 blob2.data,
3847 blob2.length,
3848 &server_name,
3849 &len);
3850 if (!ok) {
3851 status = map_nt_error_from_unix_common(errno);
3852 tevent_req_nterror(req, status);
3853 return;
3854 }
3855 }
3856 }
3857
3858 client_signing = "disabled";
3859 if (conn->allow_signing) {
3860 client_signing = "allowed";
3861 }
3862 if (conn->mandatory_signing) {
3863 client_signing = "required";
3864 }
3865
3866 server_signing = "not supported";
3867 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
3868 server_signing = "supported";
3869 server_allowed = true;
3870 }
3871 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
3872 server_signing = "required";
3873 server_mandatory = true;
3874 }
3875
3876 ok = smb_signing_set_negotiated(conn->smb1.signing,
3877 server_allowed,
3878 server_mandatory);
3879 if (!ok) {
3880 DEBUG(1,("cli_negprot: SMB signing is required, "
3881 "but client[%s] and server[%s] mismatch\n",
3882 client_signing, server_signing));
3883 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
3884 return;
3885 }
3886
3887 } else if (conn->protocol >= PROTOCOL_LANMAN1) {
3888 DATA_BLOB blob1;
3889 uint8_t key_len;
3890 time_t t;
3891
3892 if (wct != 0x0D) {
3893 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3894 return;
3895 }
3896
3897 server_security_mode = SVAL(vwv + 1, 0);
3898 server_max_xmit = SVAL(vwv + 2, 0);
3899 server_max_mux = SVAL(vwv + 3, 0);
3900 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
3901 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
3902 server_session_key = IVAL(vwv + 6, 0);
3903 server_time_zone = SVALS(vwv + 10, 0);
3904 server_time_zone *= 60;
3905 /* this time is converted to GMT by make_unix_date */
3906 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
3907 unix_to_nt_time(&server_system_time, t);
3908 key_len = SVAL(vwv + 11, 0);
3909
3910 if (num_bytes < key_len) {
3911 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3912 return;
3913 }
3914
3915 if (key_len != 0 && key_len != 8) {
3916 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3917 return;
3918 }
3919
3920 if (key_len == 8) {
3921 memcpy(server_challenge, bytes, 8);
3922 }
3923
3924 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
3925 if (blob1.length > 0) {
3926 size_t len;
3927 bool ok;
3928
3929 len = utf16_len_n(blob1.data,
3930 blob1.length);
3931 blob1.length = len;
3932
3933 ok = convert_string_talloc(state,
3934 CH_DOS,
3935 CH_UNIX,
3936 blob1.data,
3937 blob1.length,
3938 &server_workgroup,
3939 &len);
3940 if (!ok) {
3941 status = map_nt_error_from_unix_common(errno);
3942 tevent_req_nterror(req, status);
3943 return;
3944 }
3945 }
3946
3947 } else {
3948 /* the old core protocol */
3949 server_time_zone = get_time_zone(time(NULL));
3950 server_max_xmit = 1024;
3951 server_max_mux = 1;
3952 }
3953
3954 if (server_max_xmit < 1024) {
3955 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3956 return;
3957 }
3958
3959 if (server_max_mux < 1) {
3960 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
3961 return;
3962 }
3963
3964 /*
3965 * Now calculate the negotiated capabilities
3966 * based on the mask for:
3967 * - client only flags
3968 * - flags used in both directions
3969 * - server only flags
3970 */
3971 both_capabilities = client_capabilities & server_capabilities;
3972 capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
3973 capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
3974 capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
3975
3976 max_xmit = MIN(client_max_xmit, server_max_xmit);
3977
3978 conn->smb1.server.capabilities = server_capabilities;
3979 conn->smb1.capabilities = capabilities;
3980
3981 conn->smb1.server.max_xmit = server_max_xmit;
3982 conn->smb1.max_xmit = max_xmit;
3983
3984 conn->smb1.server.max_mux = server_max_mux;
3985
3986 conn->smb1.server.security_mode = server_security_mode;
3987
3988 conn->smb1.server.readbraw = server_readbraw;
3989 conn->smb1.server.writebraw = server_writebraw;
3990 conn->smb1.server.lockread = server_lockread;
3991 conn->smb1.server.writeunlock = server_writeunlock;
3992
3993 conn->smb1.server.session_key = server_session_key;
3994
3995 talloc_steal(conn, server_gss_blob.data);
3996 conn->smb1.server.gss_blob = server_gss_blob;
3997 conn->smb1.server.guid = server_guid;
3998 memcpy(conn->smb1.server.challenge, server_challenge, 8);
3999 conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4000 conn->smb1.server.name = talloc_move(conn, &server_name);
4001
4002 conn->smb1.server.time_zone = server_time_zone;
4003 conn->smb1.server.system_time = server_system_time;
4004
4005 tevent_req_done(req);
4006 }
4007
4008 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4009 {
4010 size_t i;
4011 uint8_t *buf;
4012 uint16_t dialect_count = 0;
4013
4014 buf = state->smb2.dyn;
4015 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4016 if (smb2cli_prots[i].proto < state->min_protocol) {
4017 continue;
4018 }
4019
4020 if (smb2cli_prots[i].proto > state->max_protocol) {
4021 continue;
4022 }
4023
4024 SSVAL(buf, dialect_count*2, smb2cli_prots[i].smb2_dialect);
4025 dialect_count++;
4026 }
4027
4028 buf = state->smb2.fixed;
4029 SSVAL(buf, 0, 36);
4030 SSVAL(buf, 2, dialect_count);
4031 SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4032 SSVAL(buf, 6, 0); /* Reserved */
4033 if (state->max_protocol >= PROTOCOL_SMB2_22) {
4034 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4035 } else {
4036 SIVAL(buf, 8, 0); /* Capabilities */
4037 }
4038 if (state->max_protocol >= PROTOCOL_SMB2_10) {
4039 NTSTATUS status;
4040 DATA_BLOB blob;
4041
4042 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4043 state, &blob);
4044 if (!NT_STATUS_IS_OK(status)) {
4045 return NULL;
4046 }
4047 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4048 } else {
4049 memset(buf+12, 0, 16); /* ClientGuid */
4050 }
4051 SBVAL(buf, 28, 0); /* ClientStartTime */
4052
4053 return smb2cli_req_send(state, state->ev,
4054 state->conn, SMB2_OP_NEGPROT,
4055 0, 0, /* flags */
4056 state->timeout_msec,
4057 NULL, NULL, /* tcon, session */
4058 state->smb2.fixed, sizeof(state->smb2.fixed),
4059 state->smb2.dyn, dialect_count*2);
4060 }
4061
4062 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4063 {
4064 struct tevent_req *req =
4065 tevent_req_callback_data(subreq,
4066 struct tevent_req);
4067 struct smbXcli_negprot_state *state =
4068 tevent_req_data(req,
4069 struct smbXcli_negprot_state);
4070 struct smbXcli_conn *conn = state->conn;
4071 size_t security_offset, security_length;
4072 DATA_BLOB blob;
4073 NTSTATUS status;
4074 struct iovec *iov;
4075 uint8_t *body;
4076 size_t i;
4077 uint16_t dialect_revision;
4078 static const struct smb2cli_req_expected_response expected[] = {
4079 {
4080 .status = NT_STATUS_OK,
4081 .body_size = 0x41
4082 }
4083 };
4084
4085 status = smb2cli_req_recv(subreq, state, &iov,
4086 expected, ARRAY_SIZE(expected));
4087 TALLOC_FREE(subreq);
4088 if (tevent_req_nterror(req, status)) {
4089 return;
4090 }
4091
4092 body = (uint8_t *)iov[1].iov_base;
4093
4094 dialect_revision = SVAL(body, 4);
4095
4096 for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4097 if (smb2cli_prots[i].proto < state->min_protocol) {
4098 continue;
4099 }
4100
4101 if (smb2cli_prots[i].proto > state->max_protocol) {
4102 continue;
4103 }
4104
4105 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4106 continue;
4107 }
4108
4109 conn->protocol = smb2cli_prots[i].proto;
4110 break;
4111 }
4112
4113 if (conn->protocol == PROTOCOL_NONE) {
4114 if (state->min_protocol >= PROTOCOL_SMB2_02) {
4115 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4116 return;
4117 }
4118
4119 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4120 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4121 return;
4122 }
4123
4124 /* make sure we do not loop forever */
4125 state->min_protocol = PROTOCOL_SMB2_02;
4126
4127 /*
4128 * send a SMB2 negprot, in order to negotiate
4129 * the SMB2 dialect.
4130 */
4131 subreq = smbXcli_negprot_smb2_subreq(state);
4132 if (tevent_req_nomem(subreq, req)) {
4133 return;
4134 }
4135 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4136 return;
4137 }
4138
4139 conn->smb2.server.security_mode = SVAL(body, 2);
4140
4141 blob = data_blob_const(body + 8, 16);
4142 status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4143 if (tevent_req_nterror(req, status)) {
4144 return;
4145 }
4146
4147 conn->smb2.server.capabilities = IVAL(body, 24);
4148 conn->smb2.server.max_trans_size= IVAL(body, 28);
4149 conn->smb2.server.max_read_size = IVAL(body, 32);
4150 conn->smb2.server.max_write_size= IVAL(body, 36);
4151 conn->smb2.server.system_time = BVAL(body, 40);
4152 conn->smb2.server.start_time = BVAL(body, 48);
4153
4154 security_offset = SVAL(body, 56);
4155 security_length = SVAL(body, 58);
4156
4157 if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4158 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4159 return;
4160 }
4161
4162 if (security_length > iov[2].iov_len) {
4163 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4164 return;
4165 }
4166
4167 conn->smb2.server.gss_blob = data_blob_talloc(conn,
4168 iov[2].iov_base,
4169 security_length);
4170 if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4171 return;
4172 }
4173
4174 tevent_req_done(req);
4175 }
4176
4177 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4178 TALLOC_CTX *tmp_mem,
4179 uint8_t *inbuf)
4180 {
4181 size_t num_pending = talloc_array_length(conn->pending);
4182 struct tevent_req *subreq;
4183 struct smbXcli_req_state *substate;
4184 struct tevent_req *req;
4185 uint32_t protocol_magic;
4186 size_t inbuf_len = smb_len_nbt(inbuf);
4187
4188 if (num_pending != 1) {
4189 return NT_STATUS_INTERNAL_ERROR;
4190 }
4191
4192 if (inbuf_len < 4) {
4193 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4194 }
4195
4196 subreq = conn->pending[0];
4197 substate = tevent_req_data(subreq, struct smbXcli_req_state);
4198 req = tevent_req_callback_data(subreq, struct tevent_req);
4199
4200 protocol_magic = IVAL(inbuf, 4);
4201
4202 switch (protocol_magic) {
4203 case SMB_MAGIC:
4204 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4205 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4206 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4207
4208 case SMB2_MAGIC:
4209 if (substate->smb2.recv_iov == NULL) {
4210 /*
4211 * For the SMB1 negprot we have move it.
4212 */
4213 substate->smb2.recv_iov = substate->smb1.recv_iov;
4214 substate->smb1.recv_iov = NULL;
4215 }
4216
4217 /*
4218 * we got an SMB2 answer, which consumed sequence number 0
4219 * so we need to use 1 as the next one
4220 */
4221 conn->smb2.mid = 1;
4222 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4223 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4224 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4225 }
4226
4227 DEBUG(10, ("Got non-SMB PDU\n"));
4228 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4229 }
4230
4231 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
4232 {
4233 return tevent_req_simple_recv_ntstatus(req);
4234 }
4235
4236 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
4237 uint32_t timeout_msec,
4238 enum protocol_types min_protocol,
4239 enum protocol_types max_protocol)
4240 {
4241 TALLOC_CTX *frame = talloc_stackframe();
4242 struct tevent_context *ev;
4243 struct tevent_req *req;
4244 NTSTATUS status = NT_STATUS_NO_MEMORY;
4245 bool ok;
4246
4247 if (smbXcli_conn_has_async_calls(conn)) {
4248 /*
4249 * Can't use sync call while an async call is in flight
4250 */
4251 status = NT_STATUS_INVALID_PARAMETER_MIX;
4252 goto fail;
4253 }
4254 ev = tevent_context_init(frame);
4255 if (ev == NULL) {
4256 goto fail;
4257 }
4258 req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
4259 min_protocol, max_protocol);
4260 if (req == NULL) {
4261 goto fail;
4262 }
4263 ok = tevent_req_poll(req, ev);
4264 if (!ok) {
4265 status = map_nt_error_from_unix_common(errno);
4266 goto fail;
4267 }
4268 status = smbXcli_negprot_recv(req);
4269 fail:
4270 TALLOC_FREE(frame);
4271 return status;
4272 }
4273
4274 static int smbXcli_session_destructor(struct smbXcli_session *session)
4275 {
4276 if (session->conn == NULL) {
4277 return 0;
4278 }
4279
4280 DLIST_REMOVE(session->conn->sessions, session);
4281 return 0;
4282 }
4283
4284 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
4285 struct smbXcli_conn *conn)
4286 {
4287 struct smbXcli_session *session;
4288
4289 session = talloc_zero(mem_ctx, struct smbXcli_session);
4290 if (session == NULL) {
4291 return NULL;
4292 }
4293 session->smb2 = talloc_zero(session, struct smb2cli_session);
4294 if (session->smb2 == NULL) {
4295 talloc_free(session);
4296 return NULL;
4297 }
4298 talloc_set_destructor(session, smbXcli_session_destructor);
4299
4300 DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
4301 session->conn = conn;
4302
4303 return session;
4304 }
4305
4306 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
4307 TALLOC_CTX *mem_ctx,
4308 DATA_BLOB *key)
4309 {
4310 const DATA_BLOB *application_key;
4311
4312 *key = data_blob_null;
4313
4314 if (session->conn == NULL) {
4315 return NT_STATUS_NO_USER_SESSION_KEY;
4316 }
4317
4318 if (session->conn->protocol >= PROTOCOL_SMB2_02) {
4319 application_key = &session->smb2->application_key;
4320 } else {
4321 application_key = &session->smb1.application_key;
4322 }
4323
4324 if (application_key->length == 0) {
4325 return NT_STATUS_NO_USER_SESSION_KEY;
4326 }
4327
4328 *key = data_blob_dup_talloc(mem_ctx, *application_key);
4329 if (key->data == NULL) {
4330 return NT_STATUS_NO_MEMORY;
4331 }
4332
4333 return NT_STATUS_OK;
4334 }
4335
4336 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
4337 {
4338 return session->smb1.session_id;
4339 }
4340
4341 void smb1cli_session_set_id(struct smbXcli_session *session,
4342 uint16_t session_id)
4343 {
4344 session->smb1.session_id = session_id;
4345 }
4346
4347 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
4348 const DATA_BLOB _session_key)
4349 {
4350 struct smbXcli_conn *conn = session->conn;
4351 uint8_t session_key[16];
4352
4353 if (conn == NULL) {
4354 return NT_STATUS_INVALID_PARAMETER_MIX;
4355 }
4356
4357 if (session->smb1.application_key.length != 0) {
4358 /*
4359 * TODO: do not allow this...
4360 *
4361 * return NT_STATUS_INVALID_PARAMETER_MIX;
4362 */
4363 data_blob_clear_free(&session->smb1.application_key);
4364 session->smb1.protected_key = false;
4365 }
4366
4367 if (_session_key.length == 0) {
4368 return NT_STATUS_OK;
4369 }
4370
4371 ZERO_STRUCT(session_key);
4372 memcpy(session_key, _session_key.data,
4373 MIN(_session_key.length, sizeof(session_key)));
4374
4375 session->smb1.application_key = data_blob_talloc(session,
4376 session_key,
4377 sizeof(session_key));
4378 ZERO_STRUCT(session_key);
4379 if (session->smb1.application_key.data == NULL) {
4380 return NT_STATUS_NO_MEMORY;
4381 }
4382
4383 session->smb1.protected_key = false;
4384
4385 return NT_STATUS_OK;
4386 }
4387
4388 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
4389 {
4390 if (session->smb1.protected_key) {
4391 /* already protected */
4392 return NT_STATUS_OK;
4393 }
4394
4395 if (session->smb1.application_key.length != 16) {
4396 return NT_STATUS_INVALID_PARAMETER_MIX;
4397 }
4398
4399 smb_key_derivation(session->smb1.application_key.data,
4400 session->smb1.application_key.length,
4401 session->smb1.application_key.data);
4402
4403 session->smb1.protected_key = true;
4404
4405 return NT_STATUS_OK;
4406 }
4407
4408 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
4409 {
4410 struct smbXcli_conn *conn = session->conn;
4411 uint8_t security_mode = 0;
4412
4413 if (conn == NULL) {
4414 return security_mode;
4415 }
4416
4417 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
4418 if (conn->mandatory_signing) {
4419 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
4420 }
4421
4422 return security_mode;
4423 }
4424
4425 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
4426 {
4427 return session->smb2->session_id;
4428 }
4429
4430 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
4431 {
4432 return session->smb2->session_flags;
4433 }
4434
4435 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
4436 uint64_t session_id,
4437 uint16_t session_flags)
4438 {
4439 session->smb2->session_id = session_id;
4440 session->smb2->session_flags = session_flags;
4441 }
4442
4443 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
4444 {
4445 session->smb2->channel_sequence += 1;
4446 }
4447
4448 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
4449 const DATA_BLOB _session_key,
4450 const struct iovec *recv_iov)
4451 {
4452 struct smbXcli_conn *conn = session->conn;
4453 uint16_t no_sign_flags;
4454 uint8_t session_key[16];
4455 NTSTATUS status;
4456
4457 if (conn == NULL) {
4458 return NT_STATUS_INVALID_PARAMETER_MIX;
4459 }
4460
4461 no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
4462
4463 if (session->smb2->session_flags & no_sign_flags) {
4464 session->smb2->should_sign = false;
4465 return NT_STATUS_OK;
4466 }
4467
4468 if (session->smb2->signing_key.length != 0) {
4469 return NT_STATUS_INVALID_PARAMETER_MIX;
4470 }
4471
4472 ZERO_STRUCT(session_key);
4473 memcpy(session_key, _session_key.data,
4474 MIN(_session_key.length, sizeof(session_key)));
4475
4476 session->smb2->signing_key = data_blob_talloc(session,
4477 session_key,
4478 sizeof(session_key));
4479 if (session->smb2->signing_key.data == NULL) {
4480 ZERO_STRUCT(session_key);
4481 return NT_STATUS_NO_MEMORY;
4482 }
4483
4484 if (conn->protocol >= PROTOCOL_SMB2_24) {
4485 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4486 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4487
4488 smb2_key_derivation(session_key, sizeof(session_key),
4489 label.data, label.length,
4490 context.data, context.length,
4491 session->smb2->signing_key.data);
4492 }
4493
4494 session->smb2->encryption_key = data_blob_dup_talloc(session,
4495 session->smb2->signing_key);
4496 if (session->smb2->encryption_key.data == NULL) {
4497 ZERO_STRUCT(session_key);
4498 return NT_STATUS_NO_MEMORY;
4499 }
4500
4501 if (conn->protocol >= PROTOCOL_SMB2_24) {
4502 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4503 const DATA_BLOB context = data_blob_string_const_null("ServerIn ");
4504
4505 smb2_key_derivation(session_key, sizeof(session_key),
4506 label.data, label.length,
4507 context.data, context.length,
4508 session->smb2->encryption_key.data);
4509 }
4510
4511 session->smb2->decryption_key = data_blob_dup_talloc(session,
4512 session->smb2->signing_key);
4513 if (session->smb2->decryption_key.data == NULL) {
4514 ZERO_STRUCT(session_key);
4515 return NT_STATUS_NO_MEMORY;
4516 }
4517
4518 if (conn->protocol >= PROTOCOL_SMB2_24) {
4519 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
4520 const DATA_BLOB context = data_blob_string_const_null("ServerOut");
4521
4522 smb2_key_derivation(session_key, sizeof(session_key),
4523 label.data, label.length,
4524 context.data, context.length,
4525 session->smb2->decryption_key.data);
4526 }
4527
4528 session->smb2->application_key = data_blob_dup_talloc(session,
4529 session->smb2->signing_key);
4530 if (session->smb2->application_key.data == NULL) {
4531 ZERO_STRUCT(session_key);
4532 return NT_STATUS_NO_MEMORY;
4533 }
4534
4535 if (conn->protocol >= PROTOCOL_SMB2_24) {
4536 const DATA_BLOB label = data_blob_string_const_null("SMB2APP");
4537 const DATA_BLOB context = data_blob_string_const_null("SmbRpc");
4538
4539 smb2_key_derivation(session_key, sizeof(session_key),
4540 label.data, label.length,
4541 context.data, context.length,
4542 session->smb2->application_key.data);
4543 }
4544 ZERO_STRUCT(session_key);
4545
4546 session->smb2_channel.signing_key = data_blob_dup_talloc(session,
4547 session->smb2->signing_key);
4548 if (session->smb2_channel.signing_key.data == NULL) {
4549 return NT_STATUS_NO_MEMORY;
4550 }
4551
4552 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4553 session->conn->protocol,
4554 recv_iov, 3);
4555 if (!NT_STATUS_IS_OK(status)) {
4556 return status;
4557 }
4558
4559 session->smb2->should_sign = false;
4560 session->smb2->should_encrypt = false;
4561
4562 if (conn->desire_signing) {
4563 session->smb2->should_sign = true;
4564 }
4565
4566 if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
4567 session->smb2->should_sign = true;
4568 }
4569
4570 if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
4571 session->smb2->should_encrypt = true;
4572 }
4573
4574 if (conn->protocol < PROTOCOL_SMB2_24) {
4575 session->smb2->should_encrypt = false;
4576 }
4577
4578 if (!(conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
4579 session->smb2->should_encrypt = false;
4580 }
4581
4582 generate_random_buffer((uint8_t *)&session->smb2->nonce_high,
4583 sizeof(session->smb2->nonce_high));
4584 session->smb2->nonce_low = 1;
4585
4586 return NT_STATUS_OK;
4587 }
4588
4589 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
4590 struct smbXcli_session *session1,
4591 struct smbXcli_conn *conn,
4592 struct smbXcli_session **_session2)
4593 {
4594 struct smbXcli_session *session2;
4595
4596 if (session1->smb2->signing_key.length == 0) {
4597 return NT_STATUS_INVALID_PARAMETER_MIX;
4598 }
4599
4600 if (conn == NULL) {
4601 return NT_STATUS_INVALID_PARAMETER_MIX;
4602 }
4603
4604 session2 = talloc_zero(mem_ctx, struct smbXcli_session);
4605 if (session2 == NULL) {
4606 return NT_STATUS_NO_MEMORY;
4607 }
4608 session2->smb2 = talloc_reference(session2, session1->smb2);
4609 if (session2->smb2 == NULL) {
4610 talloc_free(session2);
4611 return NT_STATUS_NO_MEMORY;
4612 }
4613
4614 talloc_set_destructor(session2, smbXcli_session_destructor);
4615 DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
4616 session2->conn = conn;
4617
4618 *_session2 = session2;
4619 return NT_STATUS_OK;
4620 }
4621
4622 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
4623 const DATA_BLOB _channel_key,
4624 const struct iovec *recv_iov)
4625 {
4626 struct smbXcli_conn *conn = session->conn;
4627 uint8_t channel_key[16];
4628 NTSTATUS status;
4629
4630 if (conn == NULL) {
4631 return NT_STATUS_INVALID_PARAMETER_MIX;
4632 }
4633
4634 if (session->smb2_channel.signing_key.length != 0) {
4635 return NT_STATUS_INVALID_PARAMETER_MIX;
4636 }
4637
4638 ZERO_STRUCT(channel_key);
4639 memcpy(channel_key, _channel_key.data,
4640 MIN(_channel_key.length, sizeof(channel_key)));
4641
4642 session->smb2_channel.signing_key = data_blob_talloc(session,
4643 channel_key,
4644 sizeof(channel_key));
4645 if (session->smb2_channel.signing_key.data == NULL) {
4646 ZERO_STRUCT(channel_key);
4647 return NT_STATUS_NO_MEMORY;
4648 }
4649
4650 if (conn->protocol >= PROTOCOL_SMB2_24) {
4651 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
4652 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
4653
4654 smb2_key_derivation(channel_key, sizeof(channel_key),
4655 label.data, label.length,
4656 context.data, context.length,
4657 session->smb2_channel.signing_key.data);
4658 }
4659 ZERO_STRUCT(channel_key);
4660
4661 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
4662 session->conn->protocol,
4663 recv_iov, 3);
4664 if (!NT_STATUS_IS_OK(status)) {
4665 return status;
4666 }
4667
4668 return NT_STATUS_OK;
4669 }
4670
4671 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
4672 {
4673 struct smbXcli_tcon *tcon;
4674
4675 tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
4676 if (tcon == NULL) {
4677 return NULL;
4678 }
4679
4680 return tcon;
4681 }
4682
4683 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
4684 {
4685 return tcon->smb1.tcon_id;
4686 }
4687
4688 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
4689 {
4690 tcon->smb1.tcon_id = tcon_id;
4691 }
4692
4693 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
4694 uint16_t tcon_id,
4695 uint16_t optional_support,
4696 uint32_t maximal_access,
4697 uint32_t guest_maximal_access,
4698 const char *service,
4699 const char *fs_type)
4700 {
4701 tcon->smb1.tcon_id = tcon_id;
4702 tcon->smb1.optional_support = optional_support;
4703 tcon->smb1.maximal_access = maximal_access;
4704 tcon->smb1.guest_maximal_access = guest_maximal_access;
4705
4706 TALLOC_FREE(tcon->smb1.service);
4707 tcon->smb1.service = talloc_strdup(tcon, service);
4708 if (service != NULL && tcon->smb1.service == NULL) {
4709 return false;
4710 }
4711
4712 TALLOC_FREE(tcon->smb1.fs_type);
4713 tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
4714 if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
4715 return false;
4716 }
4717
4718 return true;
4719 }
4720
4721 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
4722 {
4723 return tcon->smb2.tcon_id;
4724 }
4725
4726 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
4727 {
4728 return tcon->smb2.capabilities;
4729 }
4730
4731 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
4732 struct smbXcli_session *session,
4733 uint32_t tcon_id,
4734 uint8_t type,
4735 uint32_t flags,
4736 uint32_t capabilities,
4737 uint32_t maximal_access)
4738 {
4739 tcon->smb2.tcon_id = tcon_id;
4740 tcon->smb2.type = type;
4741 tcon->smb2.flags = flags;
4742 tcon->smb2.capabilities = capabilities;
4743 tcon->smb2.maximal_access = maximal_access;
4744
4745 tcon->smb2.should_encrypt = false;
4746
4747 if (session == NULL) {
4748 return;
4749 }
4750
4751 tcon->smb2.should_encrypt = session->smb2->should_encrypt;
4752
4753 if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
4754 tcon->smb2.should_encrypt = true;
4755 }
4756 }
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