summaryrefslogtreecommitdiff
path: root/source3/smbd/sesssetup.c
blob: c0d44500f33d3c026e0e93d93f7d24ca0ff285f2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
/*
   Unix SMB/CIFS implementation.
   handle SMBsessionsetup
   Copyright (C) Andrew Tridgell 1998-2001
   Copyright (C) Andrew Bartlett      2001
   Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002
   Copyright (C) Luke Howard          2003
   Copyright (C) Volker Lendecke      2007
   Copyright (C) Jeremy Allison	      2007

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "../lib/tsocket/tsocket.h"
#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "../libcli/auth/spnego.h"
#include "../auth/ntlmssp/ntlmssp.h"
#include "../librpc/gen_ndr/krb5pac.h"
#include "libads/kerberos_proto.h"
#include "../lib/util/asn1.h"
#include "auth.h"
#include "messages.h"
#include "smbprofile.h"
#include "../libcli/security/security.h"
#include "auth/gensec/gensec.h"
#include "lib/conn_tdb.h"

/****************************************************************************
 Add the standard 'Samba' signature to the end of the session setup.
****************************************************************************/

static int push_signature(uint8 **outbuf)
{
	char *lanman;
	int result, tmp;

	result = 0;

	tmp = message_push_string(outbuf, "Unix", STR_TERMINATE);

	if (tmp == -1) return -1;
	result += tmp;

	if (asprintf(&lanman, "Samba %s", samba_version_string()) != -1) {
		tmp = message_push_string(outbuf, lanman, STR_TERMINATE);
		SAFE_FREE(lanman);
	}
	else {
		tmp = message_push_string(outbuf, "Samba", STR_TERMINATE);
	}

	if (tmp == -1) return -1;
	result += tmp;

	tmp = message_push_string(outbuf, lp_workgroup(), STR_TERMINATE);

	if (tmp == -1) return -1;
	result += tmp;

	return result;
}

/****************************************************************************
 Do a 'guest' logon, getting back the
****************************************************************************/

static NTSTATUS check_guest_password(const struct tsocket_address *remote_address,
				     TALLOC_CTX *mem_ctx, 
				     struct auth_session_info **session_info)
{
	struct auth4_context *auth_context;
	struct auth_usersupplied_info *user_info = NULL;
	uint8_t chal[8];
	NTSTATUS nt_status;

	DEBUG(3,("Got anonymous request\n"));

	nt_status = make_auth4_context(talloc_tos(), &auth_context);
	if (!NT_STATUS_IS_OK(nt_status)) {
		return nt_status;
	}

	auth_context->get_ntlm_challenge(auth_context,
					 chal);

	if (!make_user_info_guest(remote_address, &user_info)) {
		TALLOC_FREE(auth_context);
		return NT_STATUS_NO_MEMORY;
	}

	nt_status = auth_check_password_session_info(auth_context, 
						     mem_ctx, user_info, session_info);
	free_user_info(&user_info);
	TALLOC_FREE(auth_context);
	return nt_status;
}

/****************************************************************************
 Reply to a session setup command.
 conn POINTER CAN BE NULL HERE !
****************************************************************************/

static void reply_sesssetup_and_X_spnego(struct smb_request *req)
{
	const uint8 *p;
	DATA_BLOB in_blob;
	DATA_BLOB out_blob = data_blob_null;
	size_t bufrem;
	char *tmp;
	const char *native_os;
	const char *native_lanman;
	const char *primary_domain;
	const char *p2;
	uint16 data_blob_len = SVAL(req->vwv+7, 0);
	enum remote_arch_types ra_type = get_remote_arch();
	int vuid = req->vuid;
	user_struct *vuser = NULL;
	NTSTATUS status = NT_STATUS_OK;
	struct smbd_server_connection *sconn = req->sconn;
	uint16_t action = 0;

	DEBUG(3,("Doing spnego session setup\n"));

	if (global_client_caps == 0) {
		global_client_caps = IVAL(req->vwv+10, 0);

		if (!(global_client_caps & CAP_STATUS32)) {
			remove_from_common_flags2(FLAGS2_32_BIT_ERROR_CODES);
		}
	}

	p = req->buf;

	if (data_blob_len == 0) {
		/* an invalid request */
		reply_nterror(req, nt_status_squash(NT_STATUS_LOGON_FAILURE));
		return;
	}

	bufrem = smbreq_bufrem(req, p);
	/* pull the spnego blob */
	in_blob = data_blob_const(p, MIN(bufrem, data_blob_len));

#if 0
	file_save("negotiate.dat", in_blob.data, in_blob.length);
#endif

	p2 = (const char *)req->buf + in_blob.length;

	p2 += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p2,
				     STR_TERMINATE);
	native_os = tmp ? tmp : "";

	p2 += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p2,
				     STR_TERMINATE);
	native_lanman = tmp ? tmp : "";

	p2 += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p2,
				     STR_TERMINATE);
	primary_domain = tmp ? tmp : "";

	DEBUG(3,("NativeOS=[%s] NativeLanMan=[%s] PrimaryDomain=[%s]\n",
		native_os, native_lanman, primary_domain));

	if ( ra_type == RA_WIN2K ) {
		/* Vista sets neither the OS or lanman strings */

		if ( !strlen(native_os) && !strlen(native_lanman) )
			set_remote_arch(RA_VISTA);

		/* Windows 2003 doesn't set the native lanman string,
		   but does set primary domain which is a bug I think */

		if ( !strlen(native_lanman) ) {
			ra_lanman_string( primary_domain );
		} else {
			ra_lanman_string( native_lanman );
		}
	} else if ( ra_type == RA_VISTA ) {
		if ( strncmp(native_os, "Mac OS X", 8) == 0 ) {
			set_remote_arch(RA_OSX);
		}
	}

	vuser = get_valid_user_struct(sconn, vuid);
	if (vuser != NULL) {
		reply_nterror(req, NT_STATUS_REQUEST_NOT_ACCEPTED);
		return;
	}

	/* Do we have a valid vuid now ? */
	if (!is_partial_auth_vuid(sconn, vuid)) {
		if (vuid != 0) {
			reply_force_doserror(req, ERRSRV, ERRbaduid);
			return;
		}

		/* No, start a new authentication setup. */
		vuid = register_initial_vuid(sconn);
		if (vuid == UID_FIELD_INVALID) {
			reply_nterror(req, nt_status_squash(
					      NT_STATUS_INVALID_PARAMETER));
			return;
		}
	}

	vuser = get_partial_auth_user_struct(sconn, vuid);
	/* This MUST be valid. */
	if (!vuser) {
		smb_panic("reply_sesssetup_and_X_spnego: invalid vuid.");
	}

	if (!vuser->gensec_security) {
		status = auth_generic_prepare(vuser, sconn->remote_address,
					      &vuser->gensec_security);
		if (!NT_STATUS_IS_OK(status)) {
			/* Kill the intermediate vuid */
			invalidate_vuid(sconn, vuid);
			reply_nterror(req, nt_status_squash(status));
			return;
		}

		gensec_want_feature(vuser->gensec_security, GENSEC_FEATURE_SESSION_KEY);
		gensec_want_feature(vuser->gensec_security, GENSEC_FEATURE_UNIX_TOKEN);

		status = gensec_start_mech_by_oid(vuser->gensec_security, GENSEC_OID_SPNEGO);
		if (!NT_STATUS_IS_OK(status)) {
			DEBUG(0, ("Failed to start SPNEGO handler!\n"));
			/* Kill the intermediate vuid */
			invalidate_vuid(sconn, vuid);
			reply_nterror(req, nt_status_squash(status));
			return;
		}
	}

	status = gensec_update(vuser->gensec_security,
			       talloc_tos(), NULL,
			       in_blob, &out_blob);
	if (!NT_STATUS_IS_OK(status) &&
	    !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
		/* Kill the intermediate vuid */
		invalidate_vuid(sconn, vuid);
		reply_nterror(req, nt_status_squash(status));
		return;
	}

	if (NT_STATUS_IS_OK(status)) {
		struct auth_session_info *session_info = NULL;
		int tmp_vuid;

		status = gensec_session_info(vuser->gensec_security,
					     talloc_tos(),
					     &session_info);
		if (!NT_STATUS_IS_OK(status)) {
			DEBUG(1,("Failed to generate session_info "
				 "(user and group token) for session setup: %s\n",
				 nt_errstr(status)));
			/* Kill the intermediate vuid */
			data_blob_free(&out_blob);
			invalidate_vuid(sconn, vuid);
			reply_nterror(req, nt_status_squash(status));
			return;
		}

		if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
			action = 1;
		}

		/* register_existing_vuid keeps the server info */
		tmp_vuid = register_existing_vuid(sconn, vuid,
						  session_info,
						  data_blob_null);
		if (tmp_vuid != vuid) {
			data_blob_free(&out_blob);
			invalidate_vuid(sconn, vuid);
			reply_nterror(req, NT_STATUS_LOGON_FAILURE);
			return;
		}

		/* current_user_info is changed on new vuid */
		reload_services(sconn, conn_snum_used, true);
	}

	reply_outbuf(req, 4, 0);

	SSVAL(req->outbuf, smb_uid, vuid);
	SIVAL(req->outbuf, smb_rcls, NT_STATUS_V(status));
	SSVAL(req->outbuf, smb_vwv0, 0xFF); /* no chaining possible */
	SSVAL(req->outbuf, smb_vwv2, action);
	SSVAL(req->outbuf, smb_vwv3, out_blob.length);

	if (message_push_blob(&req->outbuf, out_blob) == -1) {
		data_blob_free(&out_blob);
		invalidate_vuid(sconn, vuid);
		reply_nterror(req, NT_STATUS_NO_MEMORY);
		return;
	}
	data_blob_free(&out_blob);

	if (push_signature(&req->outbuf) == -1) {
		invalidate_vuid(sconn, vuid);
		reply_nterror(req, NT_STATUS_NO_MEMORY);
		return;
	}
}

/****************************************************************************
 On new VC == 0, shutdown *all* old connections and users.
 It seems that only NT4.x does this. At W2K and above (XP etc.).
 a new session setup with VC==0 is ignored.
****************************************************************************/

struct shutdown_state {
	const char *ip;
	struct messaging_context *msg_ctx;
};

static int shutdown_other_smbds(const struct connections_key *key,
				const struct connections_data *crec,
				void *private_data)
{
	struct shutdown_state *state = (struct shutdown_state *)private_data;

	DEBUG(10, ("shutdown_other_smbds: %s, %s\n",
		   server_id_str(talloc_tos(), &crec->pid), crec->addr));

	if (!process_exists(crec->pid)) {
		DEBUG(10, ("process does not exist\n"));
		return 0;
	}

	if (procid_is_me(&crec->pid)) {
		DEBUG(10, ("It's me\n"));
		return 0;
	}

	if (strcmp(state->ip, crec->addr) != 0) {
		DEBUG(10, ("%s does not match %s\n", state->ip, crec->addr));
		return 0;
	}

	DEBUG(1, ("shutdown_other_smbds: shutting down pid %u "
		  "(IP %s)\n", (unsigned int)procid_to_pid(&crec->pid),
		  state->ip));

	messaging_send(state->msg_ctx, crec->pid, MSG_SHUTDOWN,
		       &data_blob_null);
	return 0;
}

static void setup_new_vc_session(struct smbd_server_connection *sconn)
{
	DEBUG(2,("setup_new_vc_session: New VC == 0, if NT4.x "
		"compatible we would close all old resources.\n"));
#if 0
	conn_close_all();
	invalidate_all_vuids();
#endif
	if (lp_reset_on_zero_vc()) {
		char *addr;
		struct shutdown_state state;

		addr = tsocket_address_inet_addr_string(
			sconn->remote_address, talloc_tos());
		if (addr == NULL) {
			return;
		}
		state.ip = addr;
		state.msg_ctx = sconn->msg_ctx;
		connections_forall_read(shutdown_other_smbds, &state);
		TALLOC_FREE(addr);
	}
}

/****************************************************************************
 Reply to a session setup command.
****************************************************************************/

void reply_sesssetup_and_X(struct smb_request *req)
{
	int sess_vuid;
	int smb_bufsize;
	DATA_BLOB lm_resp;
	DATA_BLOB nt_resp;
	DATA_BLOB plaintext_password;
	char *tmp;
	const char *user;
	fstring sub_user; /* Sanitised username for substituion */
	const char *domain;
	const char *native_os;
	const char *native_lanman;
	const char *primary_domain;
	struct auth_usersupplied_info *user_info = NULL;
	struct auth_session_info *session_info = NULL;
	uint16 smb_flag2 = req->flags2;
	uint16_t action = 0;

	NTSTATUS nt_status;
	struct smbd_server_connection *sconn = req->sconn;

	bool doencrypt = sconn->smb1.negprot.encrypted_passwords;
	bool signing_allowed = false;
	bool signing_mandatory = false;

	START_PROFILE(SMBsesssetupX);

	ZERO_STRUCT(lm_resp);
	ZERO_STRUCT(nt_resp);
	ZERO_STRUCT(plaintext_password);

	DEBUG(3,("wct=%d flg2=0x%x\n", req->wct, req->flags2));

	if (req->flags2 & FLAGS2_SMB_SECURITY_SIGNATURES) {
		signing_allowed = true;
	}
	if (req->flags2 & FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED) {
		signing_mandatory = true;
	}

	/*
	 * We can call srv_set_signing_negotiated() each time.
	 * It finds out when it needs to turn into a noop
	 * itself.
	 */
	srv_set_signing_negotiated(req->sconn,
				   signing_allowed,
				   signing_mandatory);

	/* a SPNEGO session setup has 12 command words, whereas a normal
	   NT1 session setup has 13. See the cifs spec. */
	if (req->wct == 12 &&
	    (req->flags2 & FLAGS2_EXTENDED_SECURITY)) {

		if (!sconn->smb1.negprot.spnego) {
			DEBUG(0,("reply_sesssetup_and_X:  Rejecting attempt "
				 "at SPNEGO session setup when it was not "
				 "negotiated.\n"));
			reply_nterror(req, nt_status_squash(
					      NT_STATUS_LOGON_FAILURE));
			END_PROFILE(SMBsesssetupX);
			return;
		}

		if (SVAL(req->vwv+4, 0) == 0) {
			setup_new_vc_session(req->sconn);
		}

		reply_sesssetup_and_X_spnego(req);
		END_PROFILE(SMBsesssetupX);
		return;
	}

	smb_bufsize = SVAL(req->vwv+2, 0);

	if (get_Protocol() < PROTOCOL_NT1) {
		uint16 passlen1 = SVAL(req->vwv+7, 0);

		/* Never do NT status codes with protocols before NT1 as we
		 * don't get client caps. */
		remove_from_common_flags2(FLAGS2_32_BIT_ERROR_CODES);

		if ((passlen1 > MAX_PASS_LEN) || (passlen1 > req->buflen)) {
			reply_nterror(req, nt_status_squash(
					      NT_STATUS_INVALID_PARAMETER));
			END_PROFILE(SMBsesssetupX);
			return;
		}

		if (doencrypt) {
			lm_resp = data_blob(req->buf, passlen1);
		} else {
			plaintext_password = data_blob(req->buf, passlen1+1);
			/* Ensure null termination */
			plaintext_password.data[passlen1] = 0;
		}

		srvstr_pull_req_talloc(talloc_tos(), req, &tmp,
				       req->buf + passlen1, STR_TERMINATE);
		user = tmp ? tmp : "";

		domain = "";

	} else {
		uint16 passlen1 = SVAL(req->vwv+7, 0);
		uint16 passlen2 = SVAL(req->vwv+8, 0);
		enum remote_arch_types ra_type = get_remote_arch();
		const uint8_t *p = req->buf;
		const uint8_t *save_p = req->buf;
		uint16 byte_count;


		if(global_client_caps == 0) {
			global_client_caps = IVAL(req->vwv+11, 0);

			if (!(global_client_caps & CAP_STATUS32)) {
				remove_from_common_flags2(
						FLAGS2_32_BIT_ERROR_CODES);
			}

			/* client_caps is used as final determination if
			 * client is NT or Win95. This is needed to return
			 * the correct error codes in some circumstances.
			*/

			if(ra_type == RA_WINNT || ra_type == RA_WIN2K ||
					ra_type == RA_WIN95) {
				if(!(global_client_caps & (CAP_NT_SMBS|
							CAP_STATUS32))) {
					set_remote_arch( RA_WIN95);
				}
			}
		}

		if (!doencrypt) {
			/* both Win95 and WinNT stuff up the password
			 * lengths for non-encrypting systems. Uggh.

			   if passlen1==24 its a win95 system, and its setting
			   the password length incorrectly. Luckily it still
			   works with the default code because Win95 will null
			   terminate the password anyway

			   if passlen1>0 and passlen2>0 then maybe its a NT box
			   and its setting passlen2 to some random value which
			   really stuffs things up. we need to fix that one.  */

			if (passlen1 > 0 && passlen2 > 0 && passlen2 != 24 &&
					passlen2 != 1) {
				passlen2 = 0;
			}
		}

		/* check for nasty tricks */
		if (passlen1 > MAX_PASS_LEN
		    || passlen1 > smbreq_bufrem(req, p)) {
			reply_nterror(req, nt_status_squash(
					      NT_STATUS_INVALID_PARAMETER));
			END_PROFILE(SMBsesssetupX);
			return;
		}

		if (passlen2 > MAX_PASS_LEN
		    || passlen2 > smbreq_bufrem(req, p+passlen1)) {
			reply_nterror(req, nt_status_squash(
					      NT_STATUS_INVALID_PARAMETER));
			END_PROFILE(SMBsesssetupX);
			return;
		}

		/* Save the lanman2 password and the NT md4 password. */

		if ((doencrypt) && (passlen1 != 0) && (passlen1 != 24)) {
			doencrypt = False;
		}

		if (doencrypt) {
			lm_resp = data_blob(p, passlen1);
			nt_resp = data_blob(p+passlen1, passlen2);
		} else {
			char *pass = NULL;
			bool unic= smb_flag2 & FLAGS2_UNICODE_STRINGS;

			if (unic && (passlen2 == 0) && passlen1) {
				/* Only a ascii plaintext password was sent. */
				(void)srvstr_pull_talloc(talloc_tos(),
							req->inbuf,
							req->flags2,
							&pass,
							req->buf,
							passlen1,
							STR_TERMINATE|STR_ASCII);
			} else {
				(void)srvstr_pull_talloc(talloc_tos(),
							req->inbuf,
							req->flags2,
							&pass,
							req->buf,
							unic ? passlen2 : passlen1,
							STR_TERMINATE);
			}
			if (!pass) {
				reply_nterror(req, nt_status_squash(
					      NT_STATUS_INVALID_PARAMETER));
				END_PROFILE(SMBsesssetupX);
				return;
			}
			plaintext_password = data_blob(pass, strlen(pass)+1);
		}

		p += passlen1 + passlen2;

		p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p,
					    STR_TERMINATE);
		user = tmp ? tmp : "";

		p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p,
					    STR_TERMINATE);
		domain = tmp ? tmp : "";

		p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p,
					    STR_TERMINATE);
		native_os = tmp ? tmp : "";

		p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p,
					    STR_TERMINATE);
		native_lanman = tmp ? tmp : "";

		/* not documented or decoded by Ethereal but there is one more
		 * string in the extra bytes which is the same as the
		 * PrimaryDomain when using extended security.  Windows NT 4
		 * and 2003 use this string to store the native lanman string.
		 * Windows 9x does not include a string here at all so we have
		 * to check if we have any extra bytes left */

		byte_count = SVAL(req->vwv+13, 0);
		if ( PTR_DIFF(p, save_p) < byte_count) {
			p += srvstr_pull_req_talloc(talloc_tos(), req, &tmp, p,
						    STR_TERMINATE);
			primary_domain = tmp ? tmp : "";
		} else {
			primary_domain = talloc_strdup(talloc_tos(), "null");
		}

		DEBUG(3,("Domain=[%s]  NativeOS=[%s] NativeLanMan=[%s] "
			"PrimaryDomain=[%s]\n",
			domain, native_os, native_lanman, primary_domain));

		if ( ra_type == RA_WIN2K ) {
			if ( strlen(native_lanman) == 0 )
				ra_lanman_string( primary_domain );
			else
				ra_lanman_string( native_lanman );
		}

	}

	if (SVAL(req->vwv+4, 0) == 0) {
		setup_new_vc_session(req->sconn);
	}

	DEBUG(3,("sesssetupX:name=[%s]\\[%s]@[%s]\n",
				domain, user, get_remote_machine_name()));

	if (*user) {
		if (sconn->smb1.negprot.spnego) {

			/* This has to be here, because this is a perfectly
			 * valid behaviour for guest logons :-( */

			DEBUG(0,("reply_sesssetup_and_X:  Rejecting attempt "
				"at 'normal' session setup after "
				"negotiating spnego.\n"));
			reply_nterror(req, nt_status_squash(
					      NT_STATUS_LOGON_FAILURE));
			END_PROFILE(SMBsesssetupX);
			return;
		}
		fstrcpy(sub_user, user);
	} else {
		fstrcpy(sub_user, "");
	}

	sub_set_smb_name(sub_user);

	reload_services(sconn, conn_snum_used, true);

	if (!*user) {

		nt_status = check_guest_password(sconn->remote_address, req, &session_info);

	} else if (doencrypt) {
		struct auth4_context *negprot_auth_context = NULL;
		negprot_auth_context = sconn->smb1.negprot.auth_context;
		if (!negprot_auth_context) {
			DEBUG(0, ("reply_sesssetup_and_X:  Attempted encrypted "
				"session setup without negprot denied!\n"));
			reply_nterror(req, nt_status_squash(
					      NT_STATUS_LOGON_FAILURE));
			END_PROFILE(SMBsesssetupX);
			return;
		}
		nt_status = make_user_info_for_reply_enc(&user_info, user,
						domain,
						sconn->remote_address,
						lm_resp, nt_resp);
		if (NT_STATUS_IS_OK(nt_status)) {
			nt_status = auth_check_password_session_info(negprot_auth_context, 
								     req, user_info, &session_info);
		}
	} else {
		struct auth4_context *plaintext_auth_context = NULL;

		nt_status = make_auth4_context(
			talloc_tos(), &plaintext_auth_context);

		if (NT_STATUS_IS_OK(nt_status)) {
			uint8_t chal[8];

			plaintext_auth_context->get_ntlm_challenge(
					plaintext_auth_context, chal);

			if (!make_user_info_for_reply(&user_info,
						      user, domain,
						      sconn->remote_address,
						      chal,
						      plaintext_password)) {
				nt_status = NT_STATUS_NO_MEMORY;
			}

			if (NT_STATUS_IS_OK(nt_status)) {
				nt_status = auth_check_password_session_info(plaintext_auth_context, 
									     req, user_info, &session_info);
			}
			TALLOC_FREE(plaintext_auth_context);
		}
	}

	free_user_info(&user_info);

	if (!NT_STATUS_IS_OK(nt_status)) {
		data_blob_free(&nt_resp);
		data_blob_free(&lm_resp);
		data_blob_clear_free(&plaintext_password);
		reply_nterror(req, nt_status_squash(nt_status));
		END_PROFILE(SMBsesssetupX);
		return;
	}

	data_blob_clear_free(&plaintext_password);

	/* it's ok - setup a reply */
	reply_outbuf(req, 3, 0);
	SSVAL(req->outbuf, smb_vwv0, 0xff); /* andx chain ends */
	SSVAL(req->outbuf, smb_vwv1, 0);    /* no andx offset */

	if (get_Protocol() >= PROTOCOL_NT1) {
		push_signature(&req->outbuf);
		/* perhaps grab OS version here?? */
	}

	if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
		action = 1;
	}

	/* register the name and uid as being validated, so further connections
	   to a uid can get through without a password, on the same VC */

	/* Ignore the initial vuid. */
	sess_vuid = register_initial_vuid(sconn);
	if (sess_vuid == UID_FIELD_INVALID) {
		data_blob_free(&nt_resp);
		data_blob_free(&lm_resp);
		reply_nterror(req, nt_status_squash(
				      NT_STATUS_LOGON_FAILURE));
		END_PROFILE(SMBsesssetupX);
		return;
	}
	/* register_existing_vuid keeps the session_info */
	sess_vuid = register_existing_vuid(sconn, sess_vuid,
					   session_info,
					   nt_resp.data ? nt_resp : lm_resp);
	if (sess_vuid == UID_FIELD_INVALID) {
		data_blob_free(&nt_resp);
		data_blob_free(&lm_resp);
		reply_nterror(req, nt_status_squash(
				      NT_STATUS_LOGON_FAILURE));
		END_PROFILE(SMBsesssetupX);
		return;
	}

	/* current_user_info is changed on new vuid */
	reload_services(sconn, conn_snum_used, true);

	data_blob_free(&nt_resp);
	data_blob_free(&lm_resp);

	SSVAL(req->outbuf,smb_vwv2,action);
	SSVAL(req->outbuf,smb_uid,sess_vuid);
	SSVAL(discard_const_p(char, req->inbuf),smb_uid,sess_vuid);
	req->vuid = sess_vuid;

	if (!sconn->smb1.sessions.done_sesssetup) {
		sconn->smb1.sessions.max_send =
			MIN(sconn->smb1.sessions.max_send,smb_bufsize);
	}
	sconn->smb1.sessions.done_sesssetup = true;

	END_PROFILE(SMBsesssetupX);
}