summaryrefslogtreecommitdiff
path: root/source3/auth/auth_util.c
blob: 3f03097de43e46fea37d9955f31260f7fe7491df (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
/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   Authentication utility functions
   Copyright (C) Andrew Tridgell 1992-1998
   Copyright (C) Andrew Bartlett 2001
   Copyright (C) Jeremy Allison 2000-2001

   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"

/* Data to do lanman1/2 password challenge. */
static unsigned char saved_challenge[8];
static BOOL challenge_sent=False;
extern fstring remote_machine;
extern pstring global_myname;

/*******************************************************************
 Get the next challenge value - no repeats.
********************************************************************/

void generate_next_challenge(char *challenge)
{
	unsigned char buf[8];

	generate_random_buffer(buf,8,False);
	memcpy(saved_challenge, buf, 8);
	memcpy(challenge,buf,8);
	challenge_sent = True;
}

/*******************************************************************
 Set the last challenge sent, usually from a password server.
********************************************************************/

BOOL set_challenge(unsigned char *challenge)
{
	memcpy(saved_challenge,challenge,8);
	challenge_sent = True;
	return(True);
}

/*******************************************************************
 Get the last challenge sent.
********************************************************************/

BOOL last_challenge(unsigned char *challenge)
{
	if (!challenge_sent)
		return(False);
	memcpy(challenge,saved_challenge,8);
	return(True);
}

/****************************************************************************
 Create a UNIX user on demand.
****************************************************************************/

static int smb_create_user(const char *unix_user, const char *homedir)
{
	pstring add_script;
	int ret;

	pstrcpy(add_script, lp_adduser_script());
	if (! *add_script)
		return -1;
	all_string_sub(add_script, "%u", unix_user, sizeof(pstring));
	if (homedir)
		all_string_sub(add_script, "%H", homedir, sizeof(pstring));
	ret = smbrun(add_script,NULL);
	DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
	return ret;
}

/****************************************************************************
 Delete a UNIX user on demand.
****************************************************************************/

static int smb_delete_user(char *unix_user)
{
	pstring del_script;
	int ret;

	pstrcpy(del_script, lp_deluser_script());
	if (! *del_script)
		return -1;
	all_string_sub(del_script, "%u", unix_user, sizeof(pstring));
	ret = smbrun(del_script,NULL);
	DEBUG(3,("smb_delete_user: Running the command `%s' gave %d\n",del_script,ret));
	return ret;
}

/****************************************************************************
 Add and Delete UNIX users on demand, based on NTSTATUS codes.
****************************************************************************/

void smb_user_control(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info, NTSTATUS nt_status) 
{
	struct passwd *pwd=NULL;

	if (NT_STATUS_IS_OK(nt_status)) {

		if (!(server_info->sam_fill_level & SAM_FILL_UNIX)) {
			
			/*
			 * User validated ok against Domain controller.
			 * If the admin wants us to try and create a UNIX
			 * user on the fly, do so.
			 */
			
			if(lp_adduser_script() && !(pwd = Get_Pwnam(user_info->internal_username.str))) {
				smb_create_user(user_info->internal_username.str, NULL);
			}
		} else {			
			if(lp_adduser_script()) {
				SMB_STRUCT_STAT st;
				const char *home_dir = pdb_get_homedir(server_info->sam_account);
				/*
				 * Also call smb_create_user if the users home directory
				 * doesn't exist. Used with winbindd to allow the script to
				 * create the home directory for a user mapped with winbindd.
				 */

				if (home_dir && 
				    (sys_stat(home_dir, &st) == -1) && (errno == ENOENT)) {
						smb_create_user(user_info->internal_username.str, home_dir);
				}
			}
		}
	} else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
		/*
		 * User failed to validate ok against Domain controller.
		 * If the failure was "user doesn't exist" and admin 
		 * wants us to try and delete that UNIX user on the fly,
		 * do so.
		 */
		if (lp_deluser_script()) {
			smb_delete_user(user_info->internal_username.str);
		}
	}
}

/****************************************************************************
 Create an auth_usersupplied_data structure
****************************************************************************/

BOOL make_user_info(auth_usersupplied_info **user_info, 
		    char *smb_name, char *internal_username,
		    char *client_domain, char *domain,
		    char *wksta_name, DATA_BLOB sec_blob, 
		    DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
		    DATA_BLOB plaintext, 
		    uint32 ntlmssp_flags, BOOL encrypted)
{

	DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));

	*user_info = malloc(sizeof(**user_info));
	if (!user_info) {
		DEBUG(0,("malloc failed for user_info (size %d)\n", sizeof(*user_info)));
		return False;
	}

	ZERO_STRUCTP(*user_info);

	DEBUG(5,("makeing strings for %s's user_info struct\n", internal_username));

	(*user_info)->smb_name.str = strdup(smb_name);
	if ((*user_info)->smb_name.str) { 
		(*user_info)->smb_name.len = strlen(smb_name);
	} else {
		free_user_info(user_info);
		return False;
	}
	
	(*user_info)->internal_username.str = strdup(internal_username);
	if ((*user_info)->internal_username.str) { 
		(*user_info)->internal_username.len = strlen(internal_username);
	} else {
		free_user_info(user_info);
		return False;
	}

	(*user_info)->domain.str = strdup(domain);
	if ((*user_info)->domain.str) { 
		(*user_info)->domain.len = strlen(domain);
	} else {
		free_user_info(user_info);
		return False;
	}

	(*user_info)->client_domain.str = strdup(client_domain);
	if ((*user_info)->client_domain.str) { 
		(*user_info)->client_domain.len = strlen(client_domain);
	} else {
		free_user_info(user_info);
		return False;
	}

	(*user_info)->wksta_name.str = strdup(wksta_name);
	if ((*user_info)->wksta_name.str) { 
		(*user_info)->wksta_name.len = strlen(wksta_name);
	} else {
		free_user_info(user_info);
		return False;
	}

	DEBUG(5,("makeing blobs for %s's user_info struct\n", internal_username));

	(*user_info)->sec_blob = data_blob(sec_blob.data, sec_blob.length);
	(*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
	(*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
	(*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);

	(*user_info)->encrypted = encrypted;
	(*user_info)->ntlmssp_flags = ntlmssp_flags;

	DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));

	return True;
}

/****************************************************************************
 Create an auth_usersupplied_data structure after appropriate mapping.
****************************************************************************/

BOOL make_user_info_map(auth_usersupplied_info **user_info, 
			char *smb_name, 
			char *client_domain, 
			char *wksta_name, DATA_BLOB sec_blob, 
			DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
			DATA_BLOB plaintext, 
			uint32 ntlmssp_flags, BOOL encrypted)
{
	char *domain;
	fstring internal_username;
	fstrcpy(internal_username, smb_name);
	map_username(internal_username); 
	
	if (lp_allow_trusted_domains()) {
		domain = client_domain;
	} else {
		domain = lp_workgroup();
	}
	
	return make_user_info(user_info, 
			      smb_name, internal_username,
			      client_domain, domain,
			      wksta_name, sec_blob,
			      lm_pwd, nt_pwd,
			      plaintext, 
			      ntlmssp_flags, encrypted);
	
}

/****************************************************************************
 Create an auth_usersupplied_data, making the DATA_BLOBs here. 
 Decrupt and encrypt the passwords.
****************************************************************************/

BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info, 
				     char *smb_name, 
				     char *client_domain, 
				     char *wksta_name, uchar chal[8],
				     uchar *lm_network_pwd, int lm_pwd_len,
				     uchar *nt_network_pwd, int nt_pwd_len)
{
	BOOL ret;
	DATA_BLOB sec_blob = data_blob(chal, sizeof(chal));
	DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
	DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
	DATA_BLOB plaintext_blob = data_blob(NULL, 0);
	uint32 ntlmssp_flags = 0;

	if (lm_pwd_len)
		ntlmssp_flags |= NTLMSSP_NEGOTIATE_OEM;
	if (nt_pwd_len == 24) {
		ntlmssp_flags |= NTLMSSP_NEGOTIATE_NTLM; 
	} else if (nt_pwd_len != 0) {
		ntlmssp_flags |= NTLMSSP_NEGOTIATE_NTLM2; 
	}

	ret = make_user_info_map(user_info, 
				 smb_name, client_domain, 
				 wksta_name, sec_blob, 
				 nt_blob, lm_blob,
				 plaintext_blob, 
				 ntlmssp_flags, True);
		
	data_blob_free(&lm_blob);
	data_blob_free(&nt_blob);
	return ret;
}

/****************************************************************************
 Create an auth_usersupplied_data, making the DATA_BLOBs here. 
 Decrupt and encrypt the passwords.
****************************************************************************/

BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info, 
					 char *smb_name, 
					 char *client_domain, 
					 char *wksta_name, 
					 uchar lm_interactive_pwd[16], 
					 uchar nt_interactive_pwd[16], 
					 uchar *dc_sess_key)
{
	char lm_pwd[16];
	char nt_pwd[16];
	unsigned char local_lm_response[24];
	unsigned char local_nt_response[24];
	unsigned char key[16];
	uint8 chal[8];
	uint32 ntlmssp_flags = 0;
	
	generate_random_buffer(chal, 8, False);

	ZERO_STRUCT(key);
	memcpy(key, dc_sess_key, 8);
	
	if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
	if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
	
#ifdef DEBUG_PASSWORD
	DEBUG(100,("key:"));
	dump_data(100, (char *)key, sizeof(key));
	
	DEBUG(100,("lm owf password:"));
	dump_data(100, lm_pwd, sizeof(lm_pwd));
	
	DEBUG(100,("nt owf password:"));
	dump_data(100, nt_pwd, sizeof(nt_pwd));
#endif
	
	SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
	SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
	
#ifdef DEBUG_PASSWORD
	DEBUG(100,("decrypt of lm owf password:"));
	dump_data(100, lm_pwd, sizeof(lm_pwd));
	
	DEBUG(100,("decrypt of nt owf password:"));
	dump_data(100, nt_pwd, sizeof(nt_pwd));
#endif
	
	generate_random_buffer(chal, 8, False);
	SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
	SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
	
	/* Password info parinoia */
	ZERO_STRUCT(lm_pwd);
	ZERO_STRUCT(nt_pwd);
	ZERO_STRUCT(key);

	{
		BOOL ret;
		DATA_BLOB sec_blob = data_blob(chal, sizeof(chal));
		DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
		DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
		DATA_BLOB plaintext_blob = data_blob(NULL, 0);

		if (lm_interactive_pwd)
			ntlmssp_flags |= NTLMSSP_NEGOTIATE_OEM;
		if (nt_interactive_pwd)
			ntlmssp_flags |= NTLMSSP_NEGOTIATE_NTLM; 

		ret = make_user_info_map(user_info, 
					 smb_name, client_domain, 
					 wksta_name, sec_blob, 
					 local_lm_blob,
					 local_nt_blob,
					 plaintext_blob, 
					 ntlmssp_flags, True);
		
		data_blob_free(&local_lm_blob);
		data_blob_free(&local_nt_blob);
		return ret;
	}
}

/****************************************************************************
 Create an auth_usersupplied_data structure
****************************************************************************/

BOOL make_user_info_winbind(auth_usersupplied_info **user_info, 
                            char *username,
                            char *domain, 
                            char *password)
{
	unsigned char local_lm_response[24];
	unsigned char local_nt_response[24];
	char chal[8];
	DATA_BLOB local_lm_blob;
	DATA_BLOB local_nt_blob;
	DATA_BLOB plaintext_blob;
	uint32 ntlmssp_flags = 0;

	/*
	 * Not encrypted - do so.
	 */
	
	DEBUG(5,("pass_check_smb: User passwords not in encrypted format.\n"));
	
	generate_random_buffer(chal, 8, False);

	if (*password) {
		SMBencrypt( (uchar *)password, chal, local_lm_response);
		
		/* This encrypts the lm_pwd feild, which actualy contains the password
		   rather than the nt_pwd field becouse that contains nothing */
		
		/* WATCH OUT. This doesn't work if the incoming password is incorrectly cased. 
		   We might want to add a check here and only do an LM in that case */
		
		SMBNTencrypt((const uchar *)password, chal, local_nt_response);

		local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
		local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
		plaintext_blob = data_blob(password, strlen(password)+1);
		if ((!local_lm_blob.data) || (!local_nt_blob.data)|| (!plaintext_blob.data)) {
			data_blob_free(&local_lm_blob);
			data_blob_free(&local_nt_blob);
			data_blob_clear_free(&plaintext_blob);
			return False;
		}
		ntlmssp_flags = NTLMSSP_NEGOTIATE_OEM | NTLMSSP_NEGOTIATE_NTLM;
	} else {
		local_lm_blob = data_blob(NULL, 0);
		local_nt_blob = data_blob(NULL, 0);
		plaintext_blob = data_blob(NULL, 0);
	}

	{
		BOOL ret;
		DATA_BLOB sec_blob = data_blob(chal, sizeof(chal));
		
		if (!sec_blob.data) {
			return False;
		}

		ret = make_user_info(user_info, 
				     username, username,
				     domain, domain, 
				     global_myname, sec_blob, 
				     local_nt_blob,
				     local_lm_blob,
				     plaintext_blob, 
				     ntlmssp_flags, False);
		
		data_blob_free(&local_lm_blob);
		data_blob_free(&local_nt_blob);
		data_blob_clear_free(&plaintext_blob);
		return ret;
	}
}

/****************************************************************************
 Create an auth_usersupplied_data, making the DATA_BLOBs here. 
 Decrupt and encrypt the passwords.
****************************************************************************/

BOOL make_user_info_winbind_crap(auth_usersupplied_info **user_info, 
				 char *smb_name, 
				 char *client_domain, 
				 uchar chal[8],
				 uchar *lm_network_pwd, int lm_pwd_len,
				 uchar *nt_network_pwd, int nt_pwd_len)
{
	BOOL ret;
	DATA_BLOB sec_blob = data_blob(chal, sizeof(chal));
	DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
	DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
	DATA_BLOB plaintext_blob = data_blob(NULL, 0);
	uint32 ntlmssp_flags = 0;

	if (lm_pwd_len)
		ntlmssp_flags |= NTLMSSP_NEGOTIATE_OEM;
	if (nt_pwd_len)
		ntlmssp_flags |= NTLMSSP_NEGOTIATE_NTLM; 
	
	ret = make_user_info(user_info, 
			     smb_name, smb_name, 
			     client_domain, client_domain, 
			     global_myname, sec_blob, 
			     nt_blob, lm_blob,
			     plaintext_blob, 
			     ntlmssp_flags, True);

	data_blob_free(&lm_blob);
	data_blob_free(&nt_blob);
	return ret;
}

/****************************************************************************
 Create an auth_usersupplied_data structure
****************************************************************************/

BOOL make_user_info_for_reply(auth_usersupplied_info **user_info, 
			      char *smb_name,
			      char *client_domain, 
			      DATA_BLOB lm_resp, DATA_BLOB nt_resp,
			      DATA_BLOB plaintext_password,
			      BOOL encrypted)
{
	uchar chal[8];

	DATA_BLOB local_lm_blob;
	DATA_BLOB local_nt_blob;
	DATA_BLOB sec_blob;
	BOOL ret = False;
	uint32 ntlmssp_flags = 0;
			
	if (encrypted) {
		DATA_BLOB no_plaintext_blob = data_blob(NULL, 0); 
		if (!last_challenge(chal)) {
			DEBUG(0,("Encrypted login but no challange set!\n"));
			return False;
		}
		sec_blob = data_blob(chal, 8);
		
		if (lm_resp.length == 24) {
			ntlmssp_flags |= NTLMSSP_NEGOTIATE_OEM;
		}
		if (nt_resp.length == 0) {
		} else if (nt_resp.length == 24) {
			ntlmssp_flags |= NTLMSSP_NEGOTIATE_NTLM;
		} else {
			ntlmssp_flags |= NTLMSSP_NEGOTIATE_NTLM2;
		}

		return make_user_info_map(user_info, smb_name, 
					  client_domain, 
					  remote_machine, sec_blob,
					  lm_resp, 
					  nt_resp, 
					  no_plaintext_blob, 
					  ntlmssp_flags, encrypted);
	}

	generate_random_buffer(chal, 8, False);

	sec_blob = data_blob(chal, 8);
	
	/*
	 * Not encrypted - do so.
	 */
	
	DEBUG(5,("pass_check_smb: User passwords not in encrypted format.\n"));
	
	if (plaintext_password.data) {
		unsigned char local_lm_response[24];

		SMBencrypt( (uchar *)plaintext_password.data, chal, local_lm_response);
		local_lm_blob = data_blob(local_lm_response, 24);
		
		/* We can't do an NT hash here, as the password needs to be case insensitive */
		local_nt_blob = data_blob(NULL, 0); 
		
		ntlmssp_flags = NTLMSSP_NEGOTIATE_OEM;
	} else {
		local_lm_blob = data_blob(NULL, 0); 
		local_nt_blob = data_blob(NULL, 0); 
	}
	
	ret = make_user_info_map(user_info, smb_name,
				 client_domain, 
				 remote_machine,
				 sec_blob,
				 local_lm_blob,
				 local_nt_blob,
				 plaintext_password, 
				 ntlmssp_flags, encrypted);
	
	data_blob_free(&local_lm_blob);
	return ret;
}

/****************************************************************************
 Create a guest user_info blob, for anonymous authenticaion.
****************************************************************************/

BOOL make_user_info_guest(auth_usersupplied_info **user_info) 
{
	DATA_BLOB sec_blob = data_blob(NULL, 0);
	DATA_BLOB lm_blob = data_blob(NULL, 0);
	DATA_BLOB nt_blob = data_blob(NULL, 0);
	DATA_BLOB plaintext_blob = data_blob(NULL, 0);
	uint32 ntlmssp_flags = 0;

	return make_user_info(user_info, 
			      "","", 
			      "","", 
			      "", sec_blob, 
			      nt_blob, lm_blob,
			      plaintext_blob, 
			      ntlmssp_flags, True);
}

BOOL make_server_info(auth_serversupplied_info **server_info) 
{
	*server_info = malloc(sizeof(**server_info));
	if (!*server_info) {
		DEBUG(0,("make_server_info_sam: malloc failed!\n"));
		return False;
	}
	ZERO_STRUCTP(*server_info);
	return True;
}

BOOL make_server_info_sam(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass) 
{
	if (!make_server_info(server_info)) {
		return False;
	}

	(*server_info)->sam_fill_level = SAM_FILL_ALL;
	(*server_info)->sam_account = sampass;

	DEBUG(5,("make_server_info_sam: made sever info for user %s\n",
		 pdb_get_username((*server_info)->sam_account)));
	return True;
}

BOOL make_server_info_pw(auth_serversupplied_info **server_info, struct passwd *pwd)
{
	SAM_ACCOUNT *sampass = NULL;
	if (!pdb_init_sam_pw(&sampass, pwd)) {		
		return False;
	}
	return make_server_info_sam(server_info, sampass);
}

void free_user_info(auth_usersupplied_info **user_info)
{
	DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
	if (*user_info != NULL) {
		if ((*user_info)->smb_name.str) {
			DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
		}
		SAFE_FREE((*user_info)->smb_name.str);
		SAFE_FREE((*user_info)->internal_username.str);
		SAFE_FREE((*user_info)->client_domain.str);
		SAFE_FREE((*user_info)->domain.str);
		data_blob_free(&(*user_info)->sec_blob);
		data_blob_free(&(*user_info)->lm_resp);
		data_blob_free(&(*user_info)->nt_resp);
		SAFE_FREE((*user_info)->interactive_password);
		data_blob_clear_free(&(*user_info)->plaintext_password);
		ZERO_STRUCT(**user_info);
	}
	SAFE_FREE(*user_info);
}

/***************************************************************************
 Clear out a server_info struct that has been allocated
***************************************************************************/

void free_server_info(auth_serversupplied_info **server_info)
{
	if (*server_info != NULL) {
		pdb_free_sam(&(*server_info)->sam_account);
		
		/* call pam_end here, unless we know we are keeping it */
		delete_nt_token( &(*server_info)->ptok );
		ZERO_STRUCT(**server_info);
	}
	SAFE_FREE(*server_info);
}

/***************************************************************************
 Make a server_info struct for a guest user 
***************************************************************************/

BOOL make_server_info_guest(auth_serversupplied_info **server_info) 
{
	struct passwd *pass = sys_getpwnam(lp_guestaccount());
	
	if (pass) {
		if (!make_server_info_pw(server_info, pass)) {
			return False;
		}
		(*server_info)->guest = True;
		return True;
	}
	DEBUG(0,("make_server_info_guest: sys_getpwnam() failed on guest account!\n")); 
	return False;
}

/****************************************************************************
 Delete a SID token.
****************************************************************************/

void delete_nt_token(NT_USER_TOKEN **pptoken)
{
    if (*pptoken) {
		NT_USER_TOKEN *ptoken = *pptoken;
        SAFE_FREE( ptoken->user_sids );
        ZERO_STRUCTP(ptoken);
    }
    SAFE_FREE(*pptoken);
}

/****************************************************************************
 Duplicate a SID token.
****************************************************************************/

NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
{
	NT_USER_TOKEN *token;

	if (!ptoken)
		return NULL;

    if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
        return NULL;

    ZERO_STRUCTP(token);

    if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
        SAFE_FREE(token);
        return NULL;
    }

    token->num_sids = ptoken->num_sids;

	return token;
}

/****************************************************************************
 Check for a guest logon (username = "") and if so create the required 
 structure.
****************************************************************************/

NTSTATUS check_guest_security(const auth_usersupplied_info *user_info, 
			      auth_serversupplied_info **server_info)
{
	NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;

	if (!(user_info->internal_username.str 
	      && *user_info->internal_username.str)) { 
		if (make_server_info_guest(server_info)) {
			nt_status = NT_STATUS_OK;
		} else {
			nt_status = NT_STATUS_NO_SUCH_USER;
		}
	}

	return nt_status;
}