summaryrefslogtreecommitdiff
path: root/source3/smbd/sesssetup.c
blob: 60c9cd30e5fc512c77b0baf14ecd19ca47f5cc07 (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
/* 
   Unix SMB/Netbios implementation.
   Version 3.0
   handle SMBsessionsetup
   Copyright (C) Andrew Tridgell 1998-2001
   Copyright (C) Andrew Bartlett      2001

   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 2 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, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

uint32 global_client_caps = 0;
static auth_authsupplied_info *ntlmssp_auth_info;

/****************************************************************************
 Add the standard 'Samba' signature to the end of the session setup.
****************************************************************************/
static void add_signature(char *outbuf) 
{
	char *p;
	p = smb_buf(outbuf);
	p += srvstr_push(outbuf, p, "Unix", -1, STR_TERMINATE);
	p += srvstr_push(outbuf, p, "Samba", -1, STR_TERMINATE);
	p += srvstr_push(outbuf, p, lp_workgroup(), -1, STR_TERMINATE);
	set_message_end(outbuf,p);
}

/****************************************************************************
 Do a 'guest' logon, getting back the 
****************************************************************************/
static NTSTATUS check_guest_password(auth_serversupplied_info **server_info) 
{

	auth_authsupplied_info *auth_info;
	auth_usersupplied_info *user_info = NULL;
	
	NTSTATUS nt_status;
	char chal[8];

	ZERO_STRUCT(chal);

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

	make_user_info_guest(&user_info);
	make_auth_info_fixed(&auth_info, chal);
	
	nt_status = check_password(user_info, auth_info, server_info);
	free_auth_info(&auth_info);
	free_user_info(&user_info);
	return nt_status;
}


#ifdef HAVE_KRB5
/****************************************************************************
reply to a session setup spnego negotiate packet for kerberos
****************************************************************************/
static int reply_spnego_kerberos(connection_struct *conn, 
				 char *inbuf, char *outbuf,
				 int length, int bufsize,
				 DATA_BLOB *secblob)
{
	DATA_BLOB ticket;
	char *client, *p;
	const struct passwd *pw;
	char *user;
	int sess_vuid;
	NTSTATUS ret;
	DATA_BLOB auth_data;
	auth_serversupplied_info *server_info = NULL;
	ADS_STRUCT *ads;

	if (!spnego_parse_krb5_wrap(*secblob, &ticket)) {
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

	ads = ads_init(NULL, NULL, NULL, NULL);

	ret = ads_verify_ticket(ads, &ticket, &client, &auth_data);
	if (!NT_STATUS_IS_OK(ret)) {
		DEBUG(1,("Failed to verify incoming ticket!\n"));	
		ads_destroy(&ads);
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

	DEBUG(3,("Ticket name is [%s]\n", client));

	p = strchr_m(client, '@');
	if (!p) {
		DEBUG(3,("Doesn't look like a valid principal\n"));
		ads_destroy(&ads);
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

	*p = 0;
	if (strcasecmp(p+1, ads->realm) != 0) {
		DEBUG(3,("Ticket for foreign realm %s@%s\n", client, p+1));
		if (!lp_allow_trusted_domains()) {
			return ERROR_NT(NT_STATUS_LOGON_FAILURE);
		}
		/* this gives a fully qualified user name (ie. with full realm).
		   that leads to very long usernames, but what else can we do? */
		asprintf(&user, "%s%s%s", p+1, lp_winbind_separator(), client);
	} else {
		user = strdup(client);
	}
	ads_destroy(&ads);

	/* the password is good - let them in */
	pw = smb_getpwnam(user,False);
	if (!pw) {
		DEBUG(1,("Username %s is invalid on this system\n",user));
		return ERROR_NT(NT_STATUS_NO_SUCH_USER);
	}

	if (!make_server_info_pw(&server_info,pw)) {
		DEBUG(1,("make_server_info_from_pw failed!\n"));
		return ERROR_NT(NT_STATUS_NO_MEMORY);
	}
	
	sess_vuid = register_vuid(server_info, user);

	free(user);
	free_server_info(&server_info);

	if (sess_vuid == -1) {
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

	set_message(outbuf,4,0,True);
	SSVAL(outbuf, smb_vwv3, 0);
	add_signature(outbuf);
 
	SSVAL(outbuf,smb_uid,sess_vuid);
	SSVAL(inbuf,smb_uid,sess_vuid);
	
	return chain_reply(inbuf,outbuf,length,bufsize);
}
#endif


/****************************************************************************
send a security blob via a session setup reply
****************************************************************************/
static BOOL reply_sesssetup_blob(connection_struct *conn, char *outbuf,
				 DATA_BLOB blob)
{
	char *p;

	set_message(outbuf,4,0,True);

	/* we set NT_STATUS_MORE_PROCESSING_REQUIRED to tell the other end
	   that we aren't finished yet */

	SIVAL(outbuf, smb_rcls, NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED));
	SSVAL(outbuf, smb_vwv0, 0xFF); /* no chaining possible */
	SSVAL(outbuf, smb_vwv3, blob.length);
	p = smb_buf(outbuf);
	memcpy(p, blob.data, blob.length);
	p += blob.length;
	p += srvstr_push(outbuf, p, "Unix", -1, STR_TERMINATE);
	p += srvstr_push(outbuf, p, "Samba", -1, STR_TERMINATE);
	p += srvstr_push(outbuf, p, lp_workgroup(), -1, STR_TERMINATE);
	set_message_end(outbuf,p);
	
	return send_smb(smbd_server_fd(),outbuf);
}

/****************************************************************************
reply to a session setup spnego negotiate packet
****************************************************************************/
static int reply_spnego_negotiate(connection_struct *conn, 
				  char *inbuf,
				  char *outbuf,
				  int length, int bufsize,
				  DATA_BLOB blob1)
{
	char *OIDs[ASN1_MAX_OIDS];
	DATA_BLOB secblob;
	int i;
	uint32 ntlmssp_command, neg_flags;
	DATA_BLOB sess_key, chal, spnego_chal;
	DATA_BLOB cryptkey;
	BOOL got_kerberos = False;

	/* parse out the OIDs and the first sec blob */
	if (!parse_negTokenTarg(blob1, OIDs, &secblob)) {
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}
	
	for (i=0;OIDs[i];i++) {
		DEBUG(3,("Got OID %s\n", OIDs[i]));
		if (strcmp(OID_KERBEROS5, OIDs[i]) == 0 ||
		    strcmp(OID_KERBEROS5_OLD, OIDs[i]) == 0) {
			got_kerberos = True;
		}
		free(OIDs[i]);
	}
	DEBUG(3,("Got secblob of size %d\n", secblob.length));

#ifdef HAVE_KRB5
	if (got_kerberos) {
		int ret = reply_spnego_kerberos(conn, inbuf, outbuf, 
						length, bufsize, &secblob);
		data_blob_free(&secblob);
		return ret;
	}
#endif

	/* parse the NTLMSSP packet */
#if 0
	file_save("secblob.dat", secblob.data, secblob.length);
#endif

	if (!msrpc_parse(&secblob, "CddB",
			 "NTLMSSP",
			 &ntlmssp_command,
			 &neg_flags,
			 &sess_key)) {
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

	data_blob_free(&secblob);
	data_blob_free(&sess_key);

	if (ntlmssp_command != NTLMSSP_NEGOTIATE) {
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

	DEBUG(3,("Got neg_flags=%08x\n", neg_flags));

	if (!make_auth_info_subsystem(&ntlmssp_auth_info)) {
		return ERROR_NT(NT_STATUS_NO_MEMORY);
	}

	cryptkey = auth_get_challenge(ntlmssp_auth_info);

	/* Give them the challenge. For now, ignore neg_flags and just
	   return the flags we want. Obviously this is not correct */
	
	neg_flags = NTLMSSP_NEGOTIATE_UNICODE | 
		NTLMSSP_NEGOTIATE_LM_KEY | 
		NTLMSSP_NEGOTIATE_NTLM;

	msrpc_gen(&chal, "Cddddbdddd",
		  "NTLMSSP", 
		  NTLMSSP_CHALLENGE,
		  0,
		  0x30, /* ?? */
		  neg_flags,
		  cryptkey.data, cryptkey.length,
		  0, 0, 0,
		  0x3000); /* ?? */

	if (!spnego_gen_challenge(&spnego_chal, &chal, &chal)) {
		DEBUG(3,("Failed to generate challenge\n"));
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

	/* now tell the client to send the auth packet */
	reply_sesssetup_blob(conn, outbuf, spnego_chal);

	data_blob_free(&chal);
	data_blob_free(&cryptkey);
	data_blob_free(&spnego_chal);

	/* and tell smbd that we have already replied to this packet */
	return -1;
}

	
/****************************************************************************
reply to a session setup spnego auth packet
****************************************************************************/
static int reply_spnego_auth(connection_struct *conn, char *inbuf, char *outbuf,
			     int length, int bufsize,
			     DATA_BLOB blob1)
{
	DATA_BLOB auth;
	char *workgroup = NULL, *user = NULL, *machine = NULL;
	DATA_BLOB lmhash, nthash, sess_key;
	DATA_BLOB plaintext_password = data_blob(NULL, 0);
	uint32 ntlmssp_command, neg_flags;
	NTSTATUS nt_status;
	int sess_vuid;

	auth_usersupplied_info *user_info = NULL;
	auth_serversupplied_info *server_info = NULL;

	if (!spnego_parse_auth(blob1, &auth)) {
#if 0
		file_save("auth.dat", blob1.data, blob1.length);
#endif
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

	/* now the NTLMSSP encoded auth hashes */
	if (!msrpc_parse(&auth, "CdBBUUUBd", 
			 "NTLMSSP", 
			 &ntlmssp_command, 
			 &lmhash,
			 &nthash,
			 &workgroup, 
			 &user, 
			 &machine,
			 &sess_key,
			 &neg_flags)) {
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

	data_blob_free(&auth);
	data_blob_free(&sess_key);
	
	DEBUG(3,("Got user=[%s] workgroup=[%s] machine=[%s] len1=%d len2=%d\n",
		 user, workgroup, machine, lmhash.length, nthash.length));

#if 0
	file_save("nthash1.dat", nthash.data, nthash.length);
	file_save("lmhash1.dat", lmhash.data, lmhash.length);
#endif

	if (!make_user_info_map(&user_info, 
				user, workgroup, 
				machine, 
				lmhash, nthash,
				plaintext_password, 
				neg_flags, True)) {
		return ERROR_NT(NT_STATUS_NO_MEMORY);
	}

	SAFE_FREE(workgroup);
	SAFE_FREE(machine);
	
	nt_status = check_password(user_info, ntlmssp_auth_info, &server_info); 
	
	free_auth_info(&ntlmssp_auth_info);

	free_user_info(&user_info);
	
	data_blob_free(&lmhash);
	
	data_blob_free(&nthash);
	
	if (!NT_STATUS_IS_OK(nt_status)) {
		SAFE_FREE(user);
		return ERROR_NT(nt_status_squash(nt_status));
	}

	sess_vuid = register_vuid(server_info, user);

	free_server_info(&server_info);

	SAFE_FREE(user);
  
	if (sess_vuid == -1) {
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

	set_message(outbuf,4,0,True);
	SSVAL(outbuf, smb_vwv3, 0);
	add_signature(outbuf);
 
	SSVAL(outbuf,smb_uid,sess_vuid);
	SSVAL(inbuf,smb_uid,sess_vuid);
	
	return chain_reply(inbuf,outbuf,length,bufsize);
}


/****************************************************************************
reply to a session setup spnego anonymous packet
****************************************************************************/
static int reply_spnego_anonymous(connection_struct *conn, char *inbuf, char *outbuf,
				  int length, int bufsize)
{
	int sess_vuid;
	auth_serversupplied_info *server_info = NULL;
	NTSTATUS nt_status;

	nt_status = check_guest_password(&server_info);

	if (!NT_STATUS_IS_OK(nt_status)) {
		return ERROR_NT(nt_status_squash(nt_status));
	}

	sess_vuid = register_vuid(server_info, lp_guestaccount());

	free_server_info(&server_info);
  
	if (sess_vuid == -1) {
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

	set_message(outbuf,4,0,True);
	SSVAL(outbuf, smb_vwv3, 0);
	add_signature(outbuf);
 
	SSVAL(outbuf,smb_uid,sess_vuid);
	SSVAL(inbuf,smb_uid,sess_vuid);
	
	return chain_reply(inbuf,outbuf,length,bufsize);
}


/****************************************************************************
reply to a session setup command
****************************************************************************/
static int reply_sesssetup_and_X_spnego(connection_struct *conn, char *inbuf,char *outbuf,
					int length,int bufsize)
{
	uint8 *p;
	DATA_BLOB blob1;
	int ret;

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

	if (global_client_caps == 0) {
		global_client_caps = IVAL(inbuf,smb_vwv10);
	}
		
	p = (uint8 *)smb_buf(inbuf);

	if (SVAL(inbuf, smb_vwv7) == 0) {
		/* an anonymous request */
		return reply_spnego_anonymous(conn, inbuf, outbuf, length, bufsize);
	}

	/* pull the spnego blob */
	blob1 = data_blob(p, SVAL(inbuf, smb_vwv7));

#if 0
	file_save("negotiate.dat", blob1.data, blob1.length);
#endif

	if (blob1.data[0] == ASN1_APPLICATION(0)) {
		/* its a negTokenTarg packet */
		ret = reply_spnego_negotiate(conn, inbuf, outbuf, length, bufsize, blob1);
		data_blob_free(&blob1);
		return ret;
	}

	if (blob1.data[0] == ASN1_CONTEXT(1)) {
		/* its a auth packet */
		ret = reply_spnego_auth(conn, inbuf, outbuf, length, bufsize, blob1);
		data_blob_free(&blob1);
		return ret;
	}

	/* what sort of packet is this? */
	DEBUG(1,("Unknown packet in reply_sesssetup_and_X_spnego\n"));

	data_blob_free(&blob1);

	return ERROR_NT(NT_STATUS_LOGON_FAILURE);
}


/****************************************************************************
reply to a session setup command
****************************************************************************/
int reply_sesssetup_and_X(connection_struct *conn, char *inbuf,char *outbuf,
			  int length,int bufsize)
{
	int sess_vuid;
	int   smb_bufsize;    
	DATA_BLOB lm_resp;
	DATA_BLOB nt_resp;
	DATA_BLOB plaintext_password;
	pstring user;
	pstring sub_user; /* Sainitised username for substituion */
	fstring domain;
	fstring native_os;
	fstring native_lanman;
	static BOOL done_sesssetup = False;
	extern BOOL global_encrypted_passwords_negotiated;
	extern BOOL global_spnego_negotiated;
	extern int Protocol;
	extern fstring remote_machine;
	extern userdom_struct current_user_info;
	extern int max_send;

	auth_usersupplied_info *user_info = NULL;
	extern auth_authsupplied_info *negprot_global_auth_info;
	auth_serversupplied_info *server_info = NULL;

	NTSTATUS nt_status;

	BOOL doencrypt = global_encrypted_passwords_negotiated;

	START_PROFILE(SMBsesssetupX);

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

	DEBUG(3,("wct=%d flg2=0x%x\n", CVAL(inbuf, smb_wct), SVAL(inbuf, smb_flg2)));

	/* a SPNEGO session setup has 12 command words, whereas a normal
	   NT1 session setup has 13. See the cifs spec. */
	if (CVAL(inbuf, smb_wct) == 12 &&
	    (SVAL(inbuf, smb_flg2) & FLAGS2_EXTENDED_SECURITY)) {
		if (!global_spnego_negotiated) {
			DEBUG(0,("reply_sesssetup_and_X:  Rejecting attempt at SPNEGO session setup when it was not negoitiated.\n"));
			return ERROR_NT(NT_STATUS_UNSUCCESSFUL);
		}

		return reply_sesssetup_and_X_spnego(conn, inbuf, outbuf, length, bufsize);
	}

	smb_bufsize = SVAL(inbuf,smb_vwv2);

	if (Protocol < PROTOCOL_NT1) {
		uint16 passlen1 = SVAL(inbuf,smb_vwv7);
		if (passlen1 > MAX_PASS_LEN) {
			return ERROR_DOS(ERRDOS,ERRbuftoosmall);
		}

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

		srvstr_pull(inbuf, user, smb_buf(inbuf)+passlen1, sizeof(user), -1, STR_TERMINATE);
		*domain = 0;
  
	} else {
		uint16 passlen1 = SVAL(inbuf,smb_vwv7);
		uint16 passlen2 = SVAL(inbuf,smb_vwv8);
		enum remote_arch_types ra_type = get_remote_arch();
		char *p = smb_buf(inbuf);    

		if(global_client_caps == 0)
			global_client_caps = IVAL(inbuf,smb_vwv11);
		
		/* 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 (passlen1 > MAX_PASS_LEN) {
			return ERROR_DOS(ERRDOS,ERRbuftoosmall);
		}

		passlen1 = MIN(passlen1, MAX_PASS_LEN);
		passlen2 = MIN(passlen2, MAX_PASS_LEN);

		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;
		}
		
		/* 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 {
			plaintext_password = data_blob(p, passlen1+1);
			/* Ensure null termination */
			plaintext_password.data[passlen1] = 0;
		}
		
		p += passlen1 + passlen2;
		p += srvstr_pull(inbuf, user, p, sizeof(user), -1,
				 STR_TERMINATE);
		p += srvstr_pull(inbuf, domain, p, sizeof(domain), 
				 -1, STR_TERMINATE);
		p += srvstr_pull(inbuf, native_os, p, sizeof(native_os), 
				 -1, STR_TERMINATE);
		p += srvstr_pull(inbuf, native_lanman, p, sizeof(native_lanman),
				 -1, STR_TERMINATE);
		DEBUG(3,("Domain=[%s]  NativeOS=[%s] NativeLanMan=[%s]\n",
			 domain,native_os,native_lanman));
	}
	
	/* don't allow for weird usernames or domains */
	alpha_strcpy(user, user, ". _-$", sizeof(user));
	alpha_strcpy(domain, domain, ". _-", sizeof(domain));
	if (strstr(user, "..") || strstr(domain,"..")) {
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

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

	if (*user) {
		if (global_spnego_negotiated) {
			DEBUG(0,("reply_sesssetup_and_X:  Rejecting attempt at 'normal' session setup after negotiating spnego.\n"));
			return ERROR_NT(NT_STATUS_UNSUCCESSFUL);
		}
	}

	if (*user) {
		pstrcpy(sub_user, user);
	} else {
		pstrcpy(sub_user, lp_guestaccount());
	}

	pstrcpy(current_user_info.smb_name,sub_user);

	reload_services(True);
	
	if (lp_security() == SEC_SHARE) {
		/* in share level we should ignore any passwords */

		data_blob_free(&lm_resp);
		data_blob_free(&nt_resp);
		data_blob_clear_free(&plaintext_password);

		map_username(sub_user);
		add_session_user(sub_user);
		/* Then force it to null for the benfit of the code below */
		*user = 0;
	}
	
	if (!*user) {

		nt_status = check_guest_password(&server_info);

	} else if (doencrypt) {
		if (!make_user_info_for_reply_enc(&user_info, 
						  user, domain, 
						  lm_resp, nt_resp,
						  plaintext_password)) {
			return ERROR_NT(NT_STATUS_NO_MEMORY);
		}
		
		nt_status = check_password(user_info, negprot_global_auth_info, &server_info); 

	} else {
		auth_authsupplied_info *plaintext_auth_info = NULL;
		DATA_BLOB chal;
		if (!make_auth_info_subsystem(&plaintext_auth_info)) {
			return ERROR_NT(NT_STATUS_NO_MEMORY);
		}

		chal = auth_get_challenge(plaintext_auth_info);

		if (!make_user_info_for_reply(&user_info, 
					      user, domain, chal.data,
					      plaintext_password)) {
			return ERROR_NT(NT_STATUS_NO_MEMORY);
		}
		
		nt_status = check_password(user_info, plaintext_auth_info, &server_info); 
		
		data_blob_free(&chal);
		free_auth_info(&plaintext_auth_info);
	}

	free_user_info(&user_info);
	
	data_blob_free(&lm_resp);
	data_blob_free(&nt_resp);
	data_blob_clear_free(&plaintext_password);
	
	if (!NT_STATUS_IS_OK(nt_status)) {
		if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
			if ((lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_USER) || 
			    (lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_PASSWORD)) {
				
				DEBUG(3,("No such user %s [%s] - using guest account\n",user, domain));
				make_server_info_guest(&server_info);
				nt_status = NT_STATUS_OK;
			}

		} else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {			
			if (lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_PASSWORD) {				
				DEBUG(3,("Registered username %s for guest access\n",user));
				make_server_info_guest(&server_info);
				nt_status = NT_STATUS_OK;
			}
		}
	}
	
	if (!NT_STATUS_IS_OK(nt_status)) {
		return ERROR_NT(nt_status_squash(nt_status));
	}
	
	/* it's ok - setup a reply */
	if (Protocol < PROTOCOL_NT1) {
		set_message(outbuf,3,0,True);
	} else {
		set_message(outbuf,3,0,True);
		add_signature(outbuf);
		/* perhaps grab OS version here?? */
	}
	
	if (server_info->guest) {
		SSVAL(outbuf,smb_vwv2,1);
	} else {
		const char *home_dir = pdb_get_homedir(server_info->sam_account);
		const char *username = pdb_get_username(server_info->sam_account);
		if ((home_dir && *home_dir)
		    && (lp_servicenumber(username) < 0)) {
			add_home_service(username, home_dir);	  
		}
	}

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

	sess_vuid = register_vuid(server_info, sub_user);

	free_server_info(&server_info);
  
	if (sess_vuid == -1) {
		return ERROR_NT(NT_STATUS_LOGON_FAILURE);
	}

 
	SSVAL(outbuf,smb_uid,sess_vuid);
	SSVAL(inbuf,smb_uid,sess_vuid);
	
	if (!done_sesssetup)
		max_send = MIN(max_send,smb_bufsize);
	
	done_sesssetup = True;
	
	END_PROFILE(SMBsesssetupX);
	return chain_reply(inbuf,outbuf,length,bufsize);
}