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buildtools: Rename perl vendorarch configure option.
[Samba.git] / source3 / smbd / sesssetup.c
blob4b86a99522fc152843186d66fd1ae0dbfdc15f09
1 /*
2 Unix SMB/CIFS implementation.
3 handle SMBsessionsetup
4 Copyright (C) Andrew Tridgell 1998-2001
5 Copyright (C) Andrew Bartlett 2001
6 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002
7 Copyright (C) Luke Howard 2003
8 Copyright (C) Volker Lendecke 2007
9 Copyright (C) Jeremy Allison 2007
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 */
24
25 #include "includes.h"
26 #include "../lib/tsocket/tsocket.h"
27 #include "smbd/smbd.h"
28 #include "smbd/globals.h"
29 #include "../libcli/auth/spnego.h"
30 #include "../auth/ntlmssp/ntlmssp.h"
31 #include "../librpc/gen_ndr/krb5pac.h"
32 #include "libads/kerberos_proto.h"
33 #include "../lib/util/asn1.h"
34 #include "auth.h"
35 #include "messages.h"
36 #include "smbprofile.h"
37 #include "../libcli/security/security.h"
38 #include "auth/gensec/gensec.h"
39 #include "lib/conn_tdb.h"
40
41 /****************************************************************************
42 Add the standard 'Samba' signature to the end of the session setup.
43 ****************************************************************************/
44
45 static int push_signature(uint8 **outbuf)
46 {
47 char *lanman;
48 int result, tmp;
49 fstring native_os;
50
51 result = 0;
52
53 fstr_sprintf(native_os, "Windows %d.%d", SAMBA_MAJOR_NBT_ANNOUNCE_VERSION,
54 SAMBA_MINOR_NBT_ANNOUNCE_VERSION);
55
56 tmp = message_push_string(outbuf, native_os, STR_TERMINATE);
57
58 if (tmp == -1) return -1;
59 result += tmp;
60
61 if (asprintf(&lanman, "Samba %s", samba_version_string()) != -1) {
62 tmp = message_push_string(outbuf, lanman, STR_TERMINATE);
63 SAFE_FREE(lanman);
64 }
65 else {
66 tmp = message_push_string(outbuf, "Samba", STR_TERMINATE);
67 }
68
69 if (tmp == -1) return -1;
70 result += tmp;
71
72 tmp = message_push_string(outbuf, lp_workgroup(), STR_TERMINATE);
73
74 if (tmp == -1) return -1;
75 result += tmp;
76
77 return result;
78 }
79
80 /****************************************************************************
81 Do a 'guest' logon, getting back the
82 ****************************************************************************/
83
84 static NTSTATUS check_guest_password(const struct tsocket_address *remote_address,
85 TALLOC_CTX *mem_ctx,
86 struct auth_session_info **session_info)
87 {
88 struct auth4_context *auth_context;
89 struct auth_usersupplied_info *user_info = NULL;
90 uint8_t chal[8];
91 NTSTATUS nt_status;
92
93 DEBUG(3,("Got anonymous request\n"));
94
95 nt_status = make_auth4_context(talloc_tos(), &auth_context);
96 if (!NT_STATUS_IS_OK(nt_status)) {
97 return nt_status;
98 }
99
100 auth_context->get_ntlm_challenge(auth_context,
101 chal);
102
103 if (!make_user_info_guest(remote_address, &user_info)) {
104 TALLOC_FREE(auth_context);
105 return NT_STATUS_NO_MEMORY;
106 }
107
108 nt_status = auth_check_password_session_info(auth_context,
109 mem_ctx, user_info, session_info);
110 free_user_info(&user_info);
111 TALLOC_FREE(auth_context);
112 return nt_status;
113 }
114
115 /****************************************************************************
116 Reply to a session setup command.
117 conn POINTER CAN BE NULL HERE !
118 ****************************************************************************/
119
120 static void reply_sesssetup_and_X_spnego(struct smb_request *req)
121 {
122 const uint8 *p;
123 DATA_BLOB in_blob;
124 DATA_BLOB out_blob = data_blob_null;
125 size_t bufrem;
126 char *tmp;
127 const char *native_os;
128 const char *native_lanman;
129 const char *primary_domain;
130 const char *p2;
131 uint16 data_blob_len = SVAL(req->vwv+7, 0);
132 enum remote_arch_types ra_type = get_remote_arch();
133 uint64_t vuid = req->vuid;
134 NTSTATUS status = NT_STATUS_OK;
135 struct smbd_server_connection *sconn = req->sconn;
136 uint16_t action = 0;
137 NTTIME now = timeval_to_nttime(&req->request_time);
138 struct smbXsrv_session *session = NULL;
139 uint16_t smb_bufsize = SVAL(req->vwv+2, 0);
140 uint32_t client_caps = IVAL(req->vwv+10, 0);
141
142 DEBUG(3,("Doing spnego session setup\n"));
143
144 if (!sconn->smb1.sessions.done_sesssetup) {
145 global_client_caps = client_caps;
146
147 if (!(global_client_caps & CAP_STATUS32)) {
148 remove_from_common_flags2(FLAGS2_32_BIT_ERROR_CODES);
149 }
150 }
151
152 p = req->buf;
153
154 if (data_blob_len == 0) {
155 /* an invalid request */
156 reply_nterror(req, nt_status_squash(NT_STATUS_LOGON_FAILURE));
157 return;
158 }
159
160 bufrem = smbreq_bufrem(req, p);
161 /* pull the spnego blob */
162 in_blob = data_blob_const(p, MIN(bufrem, data_blob_len));
163
164 #if 0
165 file_save("negotiate.dat", in_blob.data, in_blob.length);
166 #endif
167
168 p2 = (const char *)req->buf + in_blob.length;
169
170 p2 += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p2,
171 STR_TERMINATE);
172 native_os = tmp ? tmp : "";
173
174 p2 += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p2,
175 STR_TERMINATE);
176 native_lanman = tmp ? tmp : "";
177
178 p2 += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p2,
179 STR_TERMINATE);
180 primary_domain = tmp ? tmp : "";
181
182 DEBUG(3,("NativeOS=[%s] NativeLanMan=[%s] PrimaryDomain=[%s]\n",
183 native_os, native_lanman, primary_domain));
184
185 if ( ra_type == RA_WIN2K ) {
186 /* Vista sets neither the OS or lanman strings */
187
188 if ( !strlen(native_os) && !strlen(native_lanman) )
189 set_remote_arch(RA_VISTA);
190
191 /* Windows 2003 doesn't set the native lanman string,
192 but does set primary domain which is a bug I think */
193
194 if ( !strlen(native_lanman) ) {
195 ra_lanman_string( primary_domain );
196 } else {
197 ra_lanman_string( native_lanman );
198 }
199 } else if ( ra_type == RA_VISTA ) {
200 if ( strncmp(native_os, "Mac OS X", 8) == 0 ) {
201 set_remote_arch(RA_OSX);
202 }
203 }
204
205 if (vuid != 0) {
206 status = smb1srv_session_lookup(sconn->conn,
207 vuid, now,
208 &session);
209 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
210 reply_force_doserror(req, ERRSRV, ERRbaduid);
211 return;
212 }
213 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED)) {
214 status = NT_STATUS_OK;
215 }
216 if (NT_STATUS_IS_OK(status)) {
217 session->status = NT_STATUS_MORE_PROCESSING_REQUIRED;
218 status = NT_STATUS_MORE_PROCESSING_REQUIRED;
219 TALLOC_FREE(session->gensec);
220 }
221 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
222 reply_nterror(req, nt_status_squash(status));
223 return;
224 }
225 }
226
227 if (session == NULL) {
228 /* create a new session */
229 status = smbXsrv_session_create(sconn->conn,
230 now, &session);
231 if (!NT_STATUS_IS_OK(status)) {
232 reply_nterror(req, nt_status_squash(status));
233 return;
234 }
235 }
236
237 if (!session->gensec) {
238 status = auth_generic_prepare(session, sconn->remote_address,
239 &session->gensec);
240 if (!NT_STATUS_IS_OK(status)) {
241 TALLOC_FREE(session);
242 reply_nterror(req, nt_status_squash(status));
243 return;
244 }
245
246 gensec_want_feature(session->gensec, GENSEC_FEATURE_SESSION_KEY);
247 gensec_want_feature(session->gensec, GENSEC_FEATURE_UNIX_TOKEN);
248
249 status = gensec_start_mech_by_oid(session->gensec,
250 GENSEC_OID_SPNEGO);
251 if (!NT_STATUS_IS_OK(status)) {
252 DEBUG(0, ("Failed to start SPNEGO handler!\n"));
253 TALLOC_FREE(session);;
254 reply_nterror(req, nt_status_squash(status));
255 return;
256 }
257 }
258
259 become_root();
260 status = gensec_update(session->gensec,
261 talloc_tos(), NULL,
262 in_blob, &out_blob);
263 unbecome_root();
264 if (!NT_STATUS_IS_OK(status) &&
265 !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
266 TALLOC_FREE(session);
267 reply_nterror(req, nt_status_squash(status));
268 return;
269 }
270
271 if (NT_STATUS_IS_OK(status) && session->global->auth_session_info == NULL) {
272 struct auth_session_info *session_info = NULL;
273
274 status = gensec_session_info(session->gensec,
275 session,
276 &session_info);
277 if (!NT_STATUS_IS_OK(status)) {
278 DEBUG(1,("Failed to generate session_info "
279 "(user and group token) for session setup: %s\n",
280 nt_errstr(status)));
281 data_blob_free(&out_blob);
282 TALLOC_FREE(session);
283 reply_nterror(req, nt_status_squash(status));
284 return;
285 }
286
287 if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
288 action = 1;
289 }
290
291 if (session_info->session_key.length > 0) {
292 struct smbXsrv_session *x = session;
293
294 /*
295 * Note: the SMB1 signing key is not truncated to 16 byte!
296 */
297 x->global->signing_key =
298 data_blob_dup_talloc(x->global,
299 session_info->session_key);
300 if (x->global->signing_key.data == NULL) {
301 data_blob_free(&out_blob);
302 TALLOC_FREE(session);
303 reply_nterror(req, NT_STATUS_NO_MEMORY);
304 return;
305 }
306
307 /*
308 * clear the session key
309 * the first tcon will add setup the application key
310 */
311 data_blob_clear_free(&session_info->session_key);
312 }
313
314 session->compat = talloc_zero(session, struct user_struct);
315 if (session->compat == NULL) {
316 data_blob_free(&out_blob);
317 TALLOC_FREE(session);
318 reply_nterror(req, NT_STATUS_NO_MEMORY);
319 return;
320 }
321 session->compat->session = session;
322 session->compat->homes_snum = -1;
323 session->compat->session_info = session_info;
324 session->compat->session_keystr = NULL;
325 session->compat->vuid = session->global->session_wire_id;
326 DLIST_ADD(sconn->users, session->compat);
327 sconn->num_users++;
328
329 if (security_session_user_level(session_info, NULL) >= SECURITY_USER) {
330 session->compat->homes_snum =
331 register_homes_share(session_info->unix_info->unix_name);
332 }
333
334 if (srv_is_signing_negotiated(sconn) &&
335 action == 0 &&
336 session->global->signing_key.length > 0)
337 {
338 /*
339 * Try and turn on server signing on the first non-guest
340 * sessionsetup.
341 */
342 srv_set_signing(sconn,
343 session->global->signing_key,
344 data_blob_null);
345 }
346
347 set_current_user_info(session_info->unix_info->sanitized_username,
348 session_info->unix_info->unix_name,
349 session_info->info->domain_name);
350
351 session->status = NT_STATUS_OK;
352 session->global->auth_session_info = talloc_move(session->global,
353 &session_info);
354 session->global->auth_session_info_seqnum += 1;
355 session->global->channels[0].auth_session_info_seqnum =
356 session->global->auth_session_info_seqnum;
357 if (client_caps & CAP_DYNAMIC_REAUTH) {
358 session->global->expiration_time =
359 gensec_expire_time(session->gensec);
360 } else {
361 session->global->expiration_time =
362 GENSEC_EXPIRE_TIME_INFINITY;
363 }
364
365 if (!session_claim(session)) {
366 DEBUG(1, ("smb1: Failed to claim session for vuid=%llu\n",
367 (unsigned long long)session->compat->vuid));
368 data_blob_free(&out_blob);
369 TALLOC_FREE(session);
370 reply_nterror(req, NT_STATUS_LOGON_FAILURE);
371 return;
372 }
373
374 status = smbXsrv_session_update(session);
375 if (!NT_STATUS_IS_OK(status)) {
376 DEBUG(0, ("smb1: Failed to update session for vuid=%llu - %s\n",
377 (unsigned long long)session->compat->vuid,
378 nt_errstr(status)));
379 data_blob_free(&out_blob);
380 TALLOC_FREE(session);
381 reply_nterror(req, NT_STATUS_LOGON_FAILURE);
382 return;
383 }
384
385 if (!sconn->smb1.sessions.done_sesssetup) {
386 if (smb_bufsize < SMB_BUFFER_SIZE_MIN) {
387 reply_force_doserror(req, ERRSRV, ERRerror);
388 return;
389 }
390 sconn->smb1.sessions.max_send = smb_bufsize;
391 sconn->smb1.sessions.done_sesssetup = true;
392 }
393
394 /* current_user_info is changed on new vuid */
395 reload_services(sconn, conn_snum_used, true);
396 } else if (NT_STATUS_IS_OK(status)) {
397 struct auth_session_info *session_info = NULL;
398
399 status = gensec_session_info(session->gensec,
400 session,
401 &session_info);
402 if (!NT_STATUS_IS_OK(status)) {
403 DEBUG(1,("Failed to generate session_info "
404 "(user and group token) for session setup: %s\n",
405 nt_errstr(status)));
406 data_blob_free(&out_blob);
407 TALLOC_FREE(session);
408 reply_nterror(req, nt_status_squash(status));
409 return;
410 }
411
412 if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
413 action = 1;
414 }
415
416 /*
417 * Keep the application key
418 */
419 data_blob_clear_free(&session_info->session_key);
420 session_info->session_key =
421 session->global->auth_session_info->session_key;
422 talloc_steal(session_info, session_info->session_key.data);
423 TALLOC_FREE(session->global->auth_session_info);
424
425 session->compat->session_info = session_info;
426
427 session->compat->vuid = session->global->session_wire_id;
428
429 if (security_session_user_level(session_info, NULL) >= SECURITY_USER) {
430 session->compat->homes_snum =
431 register_homes_share(session_info->unix_info->unix_name);
432 }
433
434 set_current_user_info(session_info->unix_info->sanitized_username,
435 session_info->unix_info->unix_name,
436 session_info->info->domain_name);
437
438 session->status = NT_STATUS_OK;
439 session->global->auth_session_info = talloc_move(session->global,
440 &session_info);
441 session->global->auth_session_info_seqnum += 1;
442 session->global->channels[0].auth_session_info_seqnum =
443 session->global->auth_session_info_seqnum;
444 if (client_caps & CAP_DYNAMIC_REAUTH) {
445 session->global->expiration_time =
446 gensec_expire_time(session->gensec);
447 } else {
448 session->global->expiration_time =
449 GENSEC_EXPIRE_TIME_INFINITY;
450 }
451
452 status = smbXsrv_session_update(session);
453 if (!NT_STATUS_IS_OK(status)) {
454 DEBUG(0, ("smb1: Failed to update session for vuid=%llu - %s\n",
455 (unsigned long long)session->compat->vuid,
456 nt_errstr(status)));
457 data_blob_free(&out_blob);
458 TALLOC_FREE(session);
459 reply_nterror(req, NT_STATUS_LOGON_FAILURE);
460 return;
461 }
462
463 conn_clear_vuid_caches(sconn, session->compat->vuid);
464
465 /* current_user_info is changed on new vuid */
466 reload_services(sconn, conn_snum_used, true);
467 }
468
469 vuid = session->global->session_wire_id;
470
471 reply_outbuf(req, 4, 0);
472
473 SSVAL(req->outbuf, smb_uid, vuid);
474 SIVAL(req->outbuf, smb_rcls, NT_STATUS_V(status));
475 SSVAL(req->outbuf, smb_vwv0, 0xFF); /* no chaining possible */
476 SSVAL(req->outbuf, smb_vwv2, action);
477 SSVAL(req->outbuf, smb_vwv3, out_blob.length);
478
479 if (message_push_blob(&req->outbuf, out_blob) == -1) {
480 data_blob_free(&out_blob);
481 TALLOC_FREE(session);
482 reply_nterror(req, NT_STATUS_NO_MEMORY);
483 return;
484 }
485 data_blob_free(&out_blob);
486
487 if (push_signature(&req->outbuf) == -1) {
488 TALLOC_FREE(session);
489 reply_nterror(req, NT_STATUS_NO_MEMORY);
490 return;
491 }
492 }
493
494 /****************************************************************************
495 On new VC == 0, shutdown *all* old connections and users.
496 It seems that only NT4.x does this. At W2K and above (XP etc.).
497 a new session setup with VC==0 is ignored.
498 ****************************************************************************/
499
500 struct shutdown_state {
501 const char *ip;
502 struct messaging_context *msg_ctx;
503 };
504
505 static int shutdown_other_smbds(struct smbXsrv_session_global0 *session,
506 void *private_data)
507 {
508 struct shutdown_state *state = (struct shutdown_state *)private_data;
509 struct server_id self_pid = messaging_server_id(state->msg_ctx);
510 struct server_id pid = session->channels[0].server_id;
511 const char *addr = session->channels[0].remote_address;
512
513 DEBUG(10, ("shutdown_other_smbds: %s, %s\n",
514 server_id_str(talloc_tos(), &pid), addr));
515
516 if (!process_exists(pid)) {
517 DEBUG(10, ("process does not exist\n"));
518 return 0;
519 }
520
521 if (serverid_equal(&pid, &self_pid)) {
522 DEBUG(10, ("It's me\n"));
523 return 0;
524 }
525
526 /*
527 * here we use strstr() because 'addr'
528 * (session->channels[0].remote_address)
529 * contains a string like:
530 * 'ipv4:127.0.0.1:48163'
531 */
532 if (strstr(addr, state->ip) == NULL) {
533 DEBUG(10, ("%s does not match %s\n", state->ip, addr));
534 return 0;
535 }
536
537 DEBUG(1, ("shutdown_other_smbds: shutting down pid %u "
538 "(IP %s)\n", (unsigned int)procid_to_pid(&pid),
539 state->ip));
540
541 messaging_send(state->msg_ctx, pid, MSG_SHUTDOWN,
542 &data_blob_null);
543 return 0;
544 }
545
546 static void setup_new_vc_session(struct smbd_server_connection *sconn)
547 {
548 DEBUG(2,("setup_new_vc_session: New VC == 0, if NT4.x "
549 "compatible we would close all old resources.\n"));
550 #if 0
551 conn_close_all();
552 invalidate_all_vuids();
553 #endif
554 if (lp_reset_on_zero_vc()) {
555 char *addr;
556 struct shutdown_state state;
557
558 addr = tsocket_address_inet_addr_string(
559 sconn->remote_address, talloc_tos());
560 if (addr == NULL) {
561 return;
562 }
563 state.ip = addr;
564 state.msg_ctx = sconn->msg_ctx;
565 smbXsrv_session_global_traverse(shutdown_other_smbds, &state);
566 TALLOC_FREE(addr);
567 }
568 }
569
570 /****************************************************************************
571 Reply to a session setup command.
572 ****************************************************************************/
573
574 void reply_sesssetup_and_X(struct smb_request *req)
575 {
576 uint64_t sess_vuid;
577 uint16_t smb_bufsize;
578 DATA_BLOB lm_resp;
579 DATA_BLOB nt_resp;
580 DATA_BLOB plaintext_password;
581 char *tmp;
582 const char *user;
583 fstring sub_user; /* Sanitised username for substituion */
584 const char *domain;
585 const char *native_os;
586 const char *native_lanman;
587 const char *primary_domain;
588 struct auth_usersupplied_info *user_info = NULL;
589 struct auth_session_info *session_info = NULL;
590 uint16 smb_flag2 = req->flags2;
591 uint16_t action = 0;
592 NTTIME now = timeval_to_nttime(&req->request_time);
593 struct smbXsrv_session *session = NULL;
594
595 NTSTATUS nt_status;
596 struct smbd_server_connection *sconn = req->sconn;
597
598 bool doencrypt = sconn->smb1.negprot.encrypted_passwords;
599 bool signing_allowed = false;
600 bool signing_mandatory = false;
601
602 START_PROFILE(SMBsesssetupX);
603
604 ZERO_STRUCT(lm_resp);
605 ZERO_STRUCT(nt_resp);
606 ZERO_STRUCT(plaintext_password);
607
608 DEBUG(3,("wct=%d flg2=0x%x\n", req->wct, req->flags2));
609
610 if (req->flags2 & FLAGS2_SMB_SECURITY_SIGNATURES) {
611 signing_allowed = true;
612 }
613 if (req->flags2 & FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED) {
614 signing_mandatory = true;
615 }
616
617 /*
618 * We can call srv_set_signing_negotiated() each time.
619 * It finds out when it needs to turn into a noop
620 * itself.
621 */
622 srv_set_signing_negotiated(req->sconn,
623 signing_allowed,
624 signing_mandatory);
625
626 /* a SPNEGO session setup has 12 command words, whereas a normal
627 NT1 session setup has 13. See the cifs spec. */
628 if (req->wct == 12 &&
629 (req->flags2 & FLAGS2_EXTENDED_SECURITY)) {
630
631 if (!sconn->smb1.negprot.spnego) {
632 DEBUG(0,("reply_sesssetup_and_X: Rejecting attempt "
633 "at SPNEGO session setup when it was not "
634 "negotiated.\n"));
635 reply_nterror(req, nt_status_squash(
636 NT_STATUS_LOGON_FAILURE));
637 END_PROFILE(SMBsesssetupX);
638 return;
639 }
640
641 if (SVAL(req->vwv+4, 0) == 0) {
642 setup_new_vc_session(req->sconn);
643 }
644
645 reply_sesssetup_and_X_spnego(req);
646 END_PROFILE(SMBsesssetupX);
647 return;
648 }
649
650 smb_bufsize = SVAL(req->vwv+2, 0);
651
652 if (get_Protocol() < PROTOCOL_NT1) {
653 uint16 passlen1 = SVAL(req->vwv+7, 0);
654
655 /* Never do NT status codes with protocols before NT1 as we
656 * don't get client caps. */
657 remove_from_common_flags2(FLAGS2_32_BIT_ERROR_CODES);
658
659 if ((passlen1 > MAX_PASS_LEN) || (passlen1 > req->buflen)) {
660 reply_nterror(req, nt_status_squash(
661 NT_STATUS_INVALID_PARAMETER));
662 END_PROFILE(SMBsesssetupX);
663 return;
664 }
665
666 if (doencrypt) {
667 lm_resp = data_blob(req->buf, passlen1);
668 } else {
669 plaintext_password = data_blob(req->buf, passlen1+1);
670 /* Ensure null termination */
671 plaintext_password.data[passlen1] = 0;
672 }
673
674 srvstr_pull_req_talloc(talloc_tos(), req, &tmp,
675 req->buf + passlen1, STR_TERMINATE);
676 user = tmp ? tmp : "";
677
678 domain = "";
679
680 } else {
681 uint16 passlen1 = SVAL(req->vwv+7, 0);
682 uint16 passlen2 = SVAL(req->vwv+8, 0);
683 enum remote_arch_types ra_type = get_remote_arch();
684 const uint8_t *p = req->buf;
685 const uint8_t *save_p = req->buf;
686 uint16 byte_count;
687
688 if (!sconn->smb1.sessions.done_sesssetup) {
689 global_client_caps = IVAL(req->vwv+11, 0);
690
691 if (!(global_client_caps & CAP_STATUS32)) {
692 remove_from_common_flags2(
693 FLAGS2_32_BIT_ERROR_CODES);
694 }
695
696 /* client_caps is used as final determination if
697 * client is NT or Win95. This is needed to return
698 * the correct error codes in some circumstances.
699 */
700
701 if(ra_type == RA_WINNT || ra_type == RA_WIN2K ||
702 ra_type == RA_WIN95) {
703 if(!(global_client_caps & (CAP_NT_SMBS|
704 CAP_STATUS32))) {
705 set_remote_arch( RA_WIN95);
706 }
707 }
708 }
709
710 if (!doencrypt) {
711 /* both Win95 and WinNT stuff up the password
712 * lengths for non-encrypting systems. Uggh.
713
714 if passlen1==24 its a win95 system, and its setting
715 the password length incorrectly. Luckily it still
716 works with the default code because Win95 will null
717 terminate the password anyway
718
719 if passlen1>0 and passlen2>0 then maybe its a NT box
720 and its setting passlen2 to some random value which
721 really stuffs things up. we need to fix that one. */
722
723 if (passlen1 > 0 && passlen2 > 0 && passlen2 != 24 &&
724 passlen2 != 1) {
725 passlen2 = 0;
726 }
727 }
728
729 /* check for nasty tricks */
730 if (passlen1 > MAX_PASS_LEN
731 || passlen1 > smbreq_bufrem(req, p)) {
732 reply_nterror(req, nt_status_squash(
733 NT_STATUS_INVALID_PARAMETER));
734 END_PROFILE(SMBsesssetupX);
735 return;
736 }
737
738 if (passlen2 > MAX_PASS_LEN
739 || passlen2 > smbreq_bufrem(req, p+passlen1)) {
740 reply_nterror(req, nt_status_squash(
741 NT_STATUS_INVALID_PARAMETER));
742 END_PROFILE(SMBsesssetupX);
743 return;
744 }
745
746 /* Save the lanman2 password and the NT md4 password. */
747
748 if ((doencrypt) && (passlen1 != 0) && (passlen1 != 24)) {
749 doencrypt = False;
750 }
751
752 if (doencrypt) {
753 lm_resp = data_blob(p, passlen1);
754 nt_resp = data_blob(p+passlen1, passlen2);
755 } else {
756 char *pass = NULL;
757 bool unic= smb_flag2 & FLAGS2_UNICODE_STRINGS;
758
759 if (unic && (passlen2 == 0) && passlen1) {
760 /* Only a ascii plaintext password was sent. */
761 (void)srvstr_pull_talloc(talloc_tos(),
762 req->inbuf,
763 req->flags2,
764 &pass,
765 req->buf,
766 passlen1,
767 STR_TERMINATE|STR_ASCII);
768 } else {
769 (void)srvstr_pull_talloc(talloc_tos(),
770 req->inbuf,
771 req->flags2,
772 &pass,
773 req->buf,
774 unic ? passlen2 : passlen1,
775 STR_TERMINATE);
776 }
777 if (!pass) {
778 reply_nterror(req, nt_status_squash(
779 NT_STATUS_INVALID_PARAMETER));
780 END_PROFILE(SMBsesssetupX);
781 return;
782 }
783 plaintext_password = data_blob(pass, strlen(pass)+1);
784 }
785
786 p += passlen1 + passlen2;
787
788 p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p,
789 STR_TERMINATE);
790 user = tmp ? tmp : "";
791
792 p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p,
793 STR_TERMINATE);
794 domain = tmp ? tmp : "";
795
796 p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p,
797 STR_TERMINATE);
798 native_os = tmp ? tmp : "";
799
800 p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p,
801 STR_TERMINATE);
802 native_lanman = tmp ? tmp : "";
803
804 /* not documented or decoded by Ethereal but there is one more
805 * string in the extra bytes which is the same as the
806 * PrimaryDomain when using extended security. Windows NT 4
807 * and 2003 use this string to store the native lanman string.
808 * Windows 9x does not include a string here at all so we have
809 * to check if we have any extra bytes left */
810
811 byte_count = SVAL(req->vwv+13, 0);
812 if ( PTR_DIFF(p, save_p) < byte_count) {
813 p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p,
814 STR_TERMINATE);
815 primary_domain = tmp ? tmp : "";
816 } else {
817 primary_domain = talloc_strdup(talloc_tos(), "null");
818 }
819
820 DEBUG(3,("Domain=[%s] NativeOS=[%s] NativeLanMan=[%s] "
821 "PrimaryDomain=[%s]\n",
822 domain, native_os, native_lanman, primary_domain));
823
824 if ( ra_type == RA_WIN2K ) {
825 if ( strlen(native_lanman) == 0 )
826 ra_lanman_string( primary_domain );
827 else
828 ra_lanman_string( native_lanman );
829 }
830
831 }
832
833 if (SVAL(req->vwv+4, 0) == 0) {
834 setup_new_vc_session(req->sconn);
835 }
836
837 DEBUG(3,("sesssetupX:name=[%s]\\[%s]@[%s]\n",
838 domain, user, get_remote_machine_name()));
839
840 if (*user) {
841 if (sconn->smb1.negprot.spnego) {
842
843 /* This has to be here, because this is a perfectly
844 * valid behaviour for guest logons :-( */
845
846 DEBUG(0,("reply_sesssetup_and_X: Rejecting attempt "
847 "at 'normal' session setup after "
848 "negotiating spnego.\n"));
849 reply_nterror(req, nt_status_squash(
850 NT_STATUS_LOGON_FAILURE));
851 END_PROFILE(SMBsesssetupX);
852 return;
853 }
854 fstrcpy(sub_user, user);
855 } else {
856 fstrcpy(sub_user, "");
857 }
858
859 sub_set_smb_name(sub_user);
860
861 reload_services(sconn, conn_snum_used, true);
862
863 if (!*user) {
864
865 nt_status = check_guest_password(sconn->remote_address, req, &session_info);
866
867 } else if (doencrypt) {
868 struct auth4_context *negprot_auth_context = NULL;
869 negprot_auth_context = sconn->smb1.negprot.auth_context;
870 if (!negprot_auth_context) {
871 DEBUG(0, ("reply_sesssetup_and_X: Attempted encrypted "
872 "session setup without negprot denied!\n"));
873 reply_nterror(req, nt_status_squash(
874 NT_STATUS_LOGON_FAILURE));
875 END_PROFILE(SMBsesssetupX);
876 return;
877 }
878 nt_status = make_user_info_for_reply_enc(&user_info, user,
879 domain,
880 sconn->remote_address,
881 lm_resp, nt_resp);
882 if (NT_STATUS_IS_OK(nt_status)) {
883 nt_status = auth_check_password_session_info(negprot_auth_context,
884 req, user_info, &session_info);
885 }
886 } else {
887 struct auth4_context *plaintext_auth_context = NULL;
888
889 nt_status = make_auth4_context(
890 talloc_tos(), &plaintext_auth_context);
891
892 if (NT_STATUS_IS_OK(nt_status)) {
893 uint8_t chal[8];
894
895 plaintext_auth_context->get_ntlm_challenge(
896 plaintext_auth_context, chal);
897
898 if (!make_user_info_for_reply(&user_info,
899 user, domain,
900 sconn->remote_address,
901 chal,
902 plaintext_password)) {
903 nt_status = NT_STATUS_NO_MEMORY;
904 }
905
906 if (NT_STATUS_IS_OK(nt_status)) {
907 nt_status = auth_check_password_session_info(plaintext_auth_context,
908 req, user_info, &session_info);
909 }
910 TALLOC_FREE(plaintext_auth_context);
911 }
912 }
913
914 free_user_info(&user_info);
915
916 if (!NT_STATUS_IS_OK(nt_status)) {
917 data_blob_free(&nt_resp);
918 data_blob_free(&lm_resp);
919 data_blob_clear_free(&plaintext_password);
920 reply_nterror(req, nt_status_squash(nt_status));
921 END_PROFILE(SMBsesssetupX);
922 return;
923 }
924
925 data_blob_clear_free(&plaintext_password);
926
927 /* it's ok - setup a reply */
928 reply_outbuf(req, 3, 0);
929 SSVAL(req->outbuf, smb_vwv0, 0xff); /* andx chain ends */
930 SSVAL(req->outbuf, smb_vwv1, 0); /* no andx offset */
931
932 if (get_Protocol() >= PROTOCOL_NT1) {
933 push_signature(&req->outbuf);
934 /* perhaps grab OS version here?? */
935 }
936
937 if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
938 action = 1;
939 }
940
941 /* register the name and uid as being validated, so further connections
942 to a uid can get through without a password, on the same VC */
943
944 nt_status = smbXsrv_session_create(sconn->conn,
945 now, &session);
946 if (!NT_STATUS_IS_OK(nt_status)) {
947 data_blob_free(&nt_resp);
948 data_blob_free(&lm_resp);
949 reply_nterror(req, nt_status_squash(nt_status));
950 END_PROFILE(SMBsesssetupX);
951 return;
952 }
953
954 if (session_info->session_key.length > 0) {
955 uint8_t session_key[16];
956
957 /*
958 * Note: the SMB1 signing key is not truncated to 16 byte!
959 */
960 session->global->signing_key =
961 data_blob_dup_talloc(session->global,
962 session_info->session_key);
963 if (session->global->signing_key.data == NULL) {
964 data_blob_free(&nt_resp);
965 data_blob_free(&lm_resp);
966 TALLOC_FREE(session);
967 reply_nterror(req, NT_STATUS_NO_MEMORY);
968 END_PROFILE(SMBsesssetupX);
969 return;
970 }
971
972 /*
973 * The application key is truncated/padded to 16 bytes
974 */
975 ZERO_STRUCT(session_key);
976 memcpy(session_key, session->global->signing_key.data,
977 MIN(session->global->signing_key.length,
978 sizeof(session_key)));
979 session->global->application_key =
980 data_blob_talloc(session->global,
981 session_key,
982 sizeof(session_key));
983 ZERO_STRUCT(session_key);
984 if (session->global->application_key.data == NULL) {
985 data_blob_free(&nt_resp);
986 data_blob_free(&lm_resp);
987 TALLOC_FREE(session);
988 reply_nterror(req, NT_STATUS_NO_MEMORY);
989 END_PROFILE(SMBsesssetupX);
990 return;
991 }
992
993 /*
994 * Place the application key into the session_info
995 */
996 data_blob_clear_free(&session_info->session_key);
997 session_info->session_key = data_blob_dup_talloc(session_info,
998 session->global->application_key);
999 if (session_info->session_key.data == NULL) {
1000 data_blob_free(&nt_resp);
1001 data_blob_free(&lm_resp);
1002 TALLOC_FREE(session);
1003 reply_nterror(req, NT_STATUS_NO_MEMORY);
1004 END_PROFILE(SMBsesssetupX);
1005 return;
1006 }
1007 }
1008
1009 session->compat = talloc_zero(session, struct user_struct);
1010 if (session->compat == NULL) {
1011 data_blob_free(&nt_resp);
1012 data_blob_free(&lm_resp);
1013 TALLOC_FREE(session);
1014 reply_nterror(req, NT_STATUS_NO_MEMORY);
1015 END_PROFILE(SMBsesssetupX);
1016 return;
1017 }
1018 session->compat->session = session;
1019 session->compat->homes_snum = -1;
1020 session->compat->session_info = session_info;
1021 session->compat->session_keystr = NULL;
1022 session->compat->vuid = session->global->session_wire_id;
1023 DLIST_ADD(sconn->users, session->compat);
1024 sconn->num_users++;
1025
1026 if (security_session_user_level(session_info, NULL) >= SECURITY_USER) {
1027 session->compat->homes_snum =
1028 register_homes_share(session_info->unix_info->unix_name);
1029 }
1030
1031 if (srv_is_signing_negotiated(sconn) &&
1032 action == 0 &&
1033 session->global->signing_key.length > 0)
1034 {
1035 /*
1036 * Try and turn on server signing on the first non-guest
1037 * sessionsetup.
1038 */
1039 srv_set_signing(sconn,
1040 session->global->signing_key,
1041 nt_resp.data ? nt_resp : lm_resp);
1042 }
1043
1044 set_current_user_info(session_info->unix_info->sanitized_username,
1045 session_info->unix_info->unix_name,
1046 session_info->info->domain_name);
1047
1048 session->status = NT_STATUS_OK;
1049 session->global->auth_session_info = talloc_move(session->global,
1050 &session_info);
1051 session->global->auth_session_info_seqnum += 1;
1052 session->global->channels[0].auth_session_info_seqnum =
1053 session->global->auth_session_info_seqnum;
1054 session->global->expiration_time = GENSEC_EXPIRE_TIME_INFINITY;
1055
1056 nt_status = smbXsrv_session_update(session);
1057 if (!NT_STATUS_IS_OK(nt_status)) {
1058 DEBUG(0, ("smb1: Failed to update session for vuid=%llu - %s\n",
1059 (unsigned long long)session->compat->vuid,
1060 nt_errstr(nt_status)));
1061 data_blob_free(&nt_resp);
1062 data_blob_free(&lm_resp);
1063 TALLOC_FREE(session);
1064 reply_nterror(req, nt_status_squash(nt_status));
1065 END_PROFILE(SMBsesssetupX);
1066 return;
1067 }
1068
1069 if (!session_claim(session)) {
1070 DEBUG(1, ("smb1: Failed to claim session for vuid=%llu\n",
1071 (unsigned long long)session->compat->vuid));
1072 data_blob_free(&nt_resp);
1073 data_blob_free(&lm_resp);
1074 TALLOC_FREE(session);
1075 reply_nterror(req, NT_STATUS_LOGON_FAILURE);
1076 END_PROFILE(SMBsesssetupX);
1077 return;
1078 }
1079
1080 /* current_user_info is changed on new vuid */
1081 reload_services(sconn, conn_snum_used, true);
1082
1083 sess_vuid = session->global->session_wire_id;
1084
1085 data_blob_free(&nt_resp);
1086 data_blob_free(&lm_resp);
1087
1088 SSVAL(req->outbuf,smb_vwv2,action);
1089 SSVAL(req->outbuf,smb_uid,sess_vuid);
1090 SSVAL(discard_const_p(char, req->inbuf),smb_uid,sess_vuid);
1091 req->vuid = sess_vuid;
1092
1093 if (!sconn->smb1.sessions.done_sesssetup) {
1094 if (smb_bufsize < SMB_BUFFER_SIZE_MIN) {
1095 reply_force_doserror(req, ERRSRV, ERRerror);
1096 END_PROFILE(SMBsesssetupX);
1097 return;
1098 }
1099 sconn->smb1.sessions.max_send = smb_bufsize;
1100 sconn->smb1.sessions.done_sesssetup = true;
1101 }
1102
1103 END_PROFILE(SMBsesssetupX);
1104 }
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