summaryrefslogtreecommitdiff
path: root/source3/lib/privileges.c
blob: 2348995dc85fd79ab8e00fbe3a2fdf2803fd424a (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
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
/*
   Unix SMB/CIFS implementation.
   Privileges handling functions
   Copyright (C) Jean François Micouleau	1998-2001
   Copyright (C) Simo Sorce			2002-2003
   Copyright (C) Gerald (Jerry) Carter          2005
   
   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"

#define PRIVPREFIX              "PRIV_"

static const SE_PRIV se_priv_all  = SE_ALL_PRIVS;
static const SE_PRIV se_priv_end  = SE_END;

/* Define variables for all privileges so we can use the
   SE_PRIV* in the various se_priv_XXX() functions */

const SE_PRIV se_priv_none       = SE_NONE;
const SE_PRIV se_machine_account = SE_MACHINE_ACCOUNT;
const SE_PRIV se_print_operator  = SE_PRINT_OPERATOR;
const SE_PRIV se_add_users       = SE_ADD_USERS;
const SE_PRIV se_disk_operators  = SE_DISK_OPERATOR;
const SE_PRIV se_remote_shutdown = SE_REMOTE_SHUTDOWN;
const SE_PRIV se_restore         = SE_RESTORE;
const SE_PRIV se_take_ownership  = SE_TAKE_OWNERSHIP;

/********************************************************************
 This is a list of privileges reported by a WIndows 2000 SP4 AD DC
 just for reference purposes (and I know the LUID is not guaranteed 
 across reboots):

            SeCreateTokenPrivilege  Create a token object ( 0x0, 0x2 )
     SeAssignPrimaryTokenPrivilege  Replace a process level token ( 0x0, 0x3 )
             SeLockMemoryPrivilege  Lock pages in memory ( 0x0, 0x4 )
          SeIncreaseQuotaPrivilege  Increase quotas ( 0x0, 0x5 )
         SeMachineAccountPrivilege  Add workstations to domain ( 0x0, 0x6 )
                    SeTcbPrivilege  Act as part of the operating system ( 0x0, 0x7 )
               SeSecurityPrivilege  Manage auditing and security log ( 0x0, 0x8 )
          SeTakeOwnershipPrivilege  Take ownership of files or other objects ( 0x0, 0x9 )
             SeLoadDriverPrivilege  Load and unload device drivers ( 0x0, 0xa )
          SeSystemProfilePrivilege  Profile system performance ( 0x0, 0xb )
             SeSystemtimePrivilege  Change the system time ( 0x0, 0xc )
   SeProfileSingleProcessPrivilege  Profile single process ( 0x0, 0xd )
   SeIncreaseBasePriorityPrivilege  Increase scheduling priority ( 0x0, 0xe )
         SeCreatePagefilePrivilege  Create a pagefile ( 0x0, 0xf )
        SeCreatePermanentPrivilege  Create permanent shared objects ( 0x0, 0x10 )
                 SeBackupPrivilege  Back up files and directories ( 0x0, 0x11 )
                SeRestorePrivilege  Restore files and directories ( 0x0, 0x12 )
               SeShutdownPrivilege  Shut down the system ( 0x0, 0x13 )
                  SeDebugPrivilege  Debug programs ( 0x0, 0x14 )
                  SeAuditPrivilege  Generate security audits ( 0x0, 0x15 )
      SeSystemEnvironmentPrivilege  Modify firmware environment values ( 0x0, 0x16 )
           SeChangeNotifyPrivilege  Bypass traverse checking ( 0x0, 0x17 )
         SeRemoteShutdownPrivilege  Force shutdown from a remote system ( 0x0, 0x18 )
                 SeUndockPrivilege  Remove computer from docking station ( 0x0, 0x19 )
              SeSyncAgentPrivilege  Synchronize directory service data ( 0x0, 0x1a )
       SeEnableDelegationPrivilege  Enable computer and user accounts to be trusted for delegation ( 0x0, 0x1b )
           SeManageVolumePrivilege  Perform volume maintenance tasks ( 0x0, 0x1c )
            SeImpersonatePrivilege  Impersonate a client after authentication ( 0x0, 0x1d )
           SeCreateGlobalPrivilege  Create global objects ( 0x0, 0x1e )

 ********************************************************************/

/* we have to define the LUID here due to a horrible check by printmig.exe
   that requires the SeBackupPrivilege match what is in Windows.  So match
   those that we implement and start Samba privileges at 0x1001 */
   
PRIVS privs[] = {
#if 0	/* usrmgr will display these twice if you include them.  We don't 
	   use them but we'll keep the bitmasks reserved in privileges.h anyways */
	   
	{SE_NETWORK_LOGON,	"SeNetworkLogonRight",		"Access this computer from network", 	   { 0x0, 0x0 }},
	{SE_INTERACTIVE_LOGON,	"SeInteractiveLogonRight",	"Log on locally", 			   { 0x0, 0x0 }},
	{SE_BATCH_LOGON,	"SeBatchLogonRight",		"Log on as a batch job",		   { 0x0, 0x0 }},
	{SE_SERVICE_LOGON,	"SeServiceLogonRight",		"Log on as a service",			   { 0x0, 0x0 }},
#endif
	{SE_MACHINE_ACCOUNT,	"SeMachineAccountPrivilege",	"Add machines to domain",		   { 0x0, 0x0006 }},
	{SE_TAKE_OWNERSHIP,     "SeTakeOwnershipPrivilege",     "Take ownership of files or other objects",{ 0x0, 0x0009 }},
        {SE_BACKUP,             "SeBackupPrivilege",            "Back up files and directories",	   { 0x0, 0x0011 }},
        {SE_RESTORE,            "SeRestorePrivilege",           "Restore files and directories",	   { 0x0, 0x0012 }},
	{SE_REMOTE_SHUTDOWN,	"SeRemoteShutdownPrivilege",	"Force shutdown from a remote system",	   { 0x0, 0x0018 }},
	
	{SE_PRINT_OPERATOR,	"SePrintOperatorPrivilege",	"Manage printers",			   { 0x0, 0x1001 }},
	{SE_ADD_USERS,		"SeAddUsersPrivilege",		"Add users and groups to the domain",	   { 0x0, 0x1002 }},
	{SE_DISK_OPERATOR,	"SeDiskOperatorPrivilege",	"Manage disk shares",			   { 0x0, 0x1003 }},

	{SE_END, "", "", { 0x0, 0x0 }}
};

typedef struct {
	size_t count;
	DOM_SID *list;
} SID_LIST;

typedef struct {
	SE_PRIV privilege;
	SID_LIST sids;
} PRIV_SID_LIST;

/***************************************************************************
 copy an SE_PRIV structure
****************************************************************************/

BOOL se_priv_copy( SE_PRIV *dst, const SE_PRIV *src )
{
	if ( !dst || !src )
		return False;
		
	memcpy( dst, src, sizeof(SE_PRIV) );
	
	return True;
}

/***************************************************************************
 combine 2 SE_PRIV structures and store the resulting set in mew_mask
****************************************************************************/

void se_priv_add( SE_PRIV *mask, const SE_PRIV *addpriv )
{
	int i;

	for ( i=0; i<SE_PRIV_MASKSIZE; i++ ) {
		mask->mask[i] |= addpriv->mask[i];
	}
}

/***************************************************************************
 remove one SE_PRIV sytucture from another and store the resulting set 
 in mew_mask
****************************************************************************/

void se_priv_remove( SE_PRIV *mask, const SE_PRIV *removepriv )
{	
	int i;

	for ( i=0; i<SE_PRIV_MASKSIZE; i++ ) {
		mask->mask[i] &= ~removepriv->mask[i];
	}
}

/***************************************************************************
 invert a given SE_PRIV and store the set in new_mask
****************************************************************************/

static void se_priv_invert( SE_PRIV *new_mask, const SE_PRIV *mask )
{	
	SE_PRIV allprivs;
	
	se_priv_copy( &allprivs, &se_priv_all );
	se_priv_remove( &allprivs, mask );
	se_priv_copy( new_mask, &allprivs );
}

/***************************************************************************
 check if 2 SE_PRIV structure are equal
****************************************************************************/

static BOOL se_priv_equal( const SE_PRIV *mask1, const SE_PRIV *mask2 )
{	
	return ( memcmp(mask1, mask2, sizeof(SE_PRIV)) == 0 );
}

/***************************************************************************
 check if a SE_PRIV has any assigned privileges
****************************************************************************/

static BOOL se_priv_empty( const SE_PRIV *mask )
{
	SE_PRIV p1;
	int i;
	
	se_priv_copy( &p1, mask );

	for ( i=0; i<SE_PRIV_MASKSIZE; i++ ) {
		p1.mask[i] &= se_priv_all.mask[i];
	}
	
	return se_priv_equal( &p1, &se_priv_none );
}

/*********************************************************************
 Lookup the SE_PRIV value for a privilege name 
*********************************************************************/

BOOL se_priv_from_name( const char *name, SE_PRIV *mask )
{
	int i;

	for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
		if ( strequal( privs[i].name, name ) ) {
			se_priv_copy( mask, &privs[i].se_priv );
			return True;
		}
	}

	return False;
}

/***************************************************************************
 dump an SE_PRIV structure to the log files
****************************************************************************/

void dump_se_priv( int dbg_cl, int dbg_lvl, const SE_PRIV *mask )
{
	int i;
	
	DEBUGADDC( dbg_cl, dbg_lvl,("SE_PRIV "));
	
	for ( i=0; i<SE_PRIV_MASKSIZE; i++ ) {
		DEBUGADDC( dbg_cl, dbg_lvl,(" 0x%x", mask->mask[i] ));
	}
		
	DEBUGADDC( dbg_cl, dbg_lvl, ("\n"));
}

/***************************************************************************
 Retrieve the privilege mask (set) for a given SID
****************************************************************************/

static BOOL get_privileges( const DOM_SID *sid, SE_PRIV *mask )
{
	TDB_CONTEXT *tdb = get_account_pol_tdb();
	fstring keystr;
	TDB_DATA data;

	/* Fail if the admin has not enable privileges */
	
	if ( !lp_enable_privileges() ) {
		return False;
	}
	
	if ( !tdb )
		return False;

	/* PRIV_<SID> (NULL terminated) as the key */
	
	fstr_sprintf( keystr, "%s%s", PRIVPREFIX, sid_string_static(sid) );

	data = tdb_fetch_bystring( tdb, keystr );
	
	if ( !data.dptr ) {
		DEBUG(3,("get_privileges: No privileges assigned to SID [%s]\n",
			sid_string_static(sid)));
		return False;
	}
	
	SMB_ASSERT( data.dsize == sizeof( SE_PRIV ) );
	
	se_priv_copy( mask, (SE_PRIV*)data.dptr );
	SAFE_FREE(data.dptr);

	return True;
}

/***************************************************************************
 Store the privilege mask (set) for a given SID
****************************************************************************/

static BOOL set_privileges( const DOM_SID *sid, SE_PRIV *mask )
{
	TDB_CONTEXT *tdb = get_account_pol_tdb();
	fstring keystr;
	TDB_DATA data;
	
	if ( !lp_enable_privileges() )
		return False;

	if ( !tdb )
		return False;

	if ( !sid || (sid->num_auths == 0) ) {
		DEBUG(0,("set_privileges: Refusing to store empty SID!\n"));
		return False;
	}

	/* PRIV_<SID> (NULL terminated) as the key */
	
	fstr_sprintf( keystr, "%s%s", PRIVPREFIX, sid_string_static(sid) );
	
	/* no packing.  static size structure, just write it out */
	
	data.dptr  = (char*)mask;
	data.dsize = sizeof(SE_PRIV);

	return ( tdb_store_bystring(tdb, keystr, data, TDB_REPLACE) != -1 );
}

/****************************************************************************
 check if the privilege is in the privilege list
****************************************************************************/

static BOOL is_privilege_assigned( const SE_PRIV *privileges,
				   const SE_PRIV *check )
{
	SE_PRIV p1, p2;

	if ( !privileges || !check )
		return False;
	
	/* everyone has privileges if you aren't checking for any */
	
	if ( se_priv_empty( check ) ) {
		DEBUG(1,("is_privilege_assigned: no privileges in check_mask!\n"));
		return True;
	}
	
	se_priv_copy( &p1, check );
	
	/* invert the SE_PRIV we want to check for and remove that from the 
	   original set.  If we are left with the SE_PRIV we are checking 
	   for then return True */
	   
	se_priv_invert( &p1, check );
	se_priv_copy( &p2, privileges );
	se_priv_remove( &p2, &p1 );
	
	return se_priv_equal( &p2, check );
}

/****************************************************************************
 check if the privilege is in the privilege list
****************************************************************************/

static BOOL is_any_privilege_assigned( SE_PRIV *privileges, const SE_PRIV *check )
{
	SE_PRIV p1, p2;

	if ( !privileges || !check )
		return False;
	
	/* everyone has privileges if you aren't checking for any */
	
	if ( se_priv_empty( check ) ) {
		DEBUG(1,("is_any_privilege_assigned: no privileges in check_mask!\n"));
		return True;
	}
	
	se_priv_copy( &p1, check );
	
	/* invert the SE_PRIV we want to check for and remove that from the 
	   original set.  If we are left with the SE_PRIV we are checking 
	   for then return True */
	   
	se_priv_invert( &p1, check );
	se_priv_copy( &p2, privileges );
	se_priv_remove( &p2, &p1 );
	
	/* see if we have any bits left */
	
	return !se_priv_empty( &p2 );
}

/****************************************************************************
 add a privilege to a privilege array
 ****************************************************************************/

static BOOL privilege_set_add(PRIVILEGE_SET *priv_set, LUID_ATTR set)
{
	LUID_ATTR *new_set;

	/* we can allocate memory to add the new privilege */

	new_set = TALLOC_REALLOC_ARRAY(priv_set->mem_ctx, priv_set->set, LUID_ATTR, priv_set->count + 1);
	if ( !new_set ) {
		DEBUG(0,("privilege_set_add: failed to allocate memory!\n"));
		return False;
	}	

	new_set[priv_set->count].luid.high = set.luid.high;
	new_set[priv_set->count].luid.low = set.luid.low;
	new_set[priv_set->count].attr = set.attr;

	priv_set->count++;
	priv_set->set = new_set;

	return True;
}

/*********************************************************************
 Generate the LUID_ATTR structure based on a bitmask
 The assumption here is that the privilege has already been validated
 so we are guaranteed to find it in the list. 
*********************************************************************/

LUID_ATTR get_privilege_luid( SE_PRIV *mask )
{
	LUID_ATTR priv_luid;
	int i;

	ZERO_STRUCT( priv_luid );
	
	for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
	
		if ( se_priv_equal( &privs[i].se_priv, mask ) ) {
			priv_luid.luid = privs[i].luid;
			break;
		}
	}

	return priv_luid;
}

/*********************************************************************
 Generate the LUID_ATTR structure based on a bitmask
*********************************************************************/

const char* get_privilege_dispname( const char *name )
{
	int i;

	for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
	
		if ( strequal( privs[i].name, name ) ) {
			return privs[i].description;
		}
	}

	return NULL;
}

/*********************************************************************
 get a list of all privleges for all sids the in list
*********************************************************************/

BOOL get_privileges_for_sids(SE_PRIV *privileges, DOM_SID *slist, int scount)
{
	SE_PRIV mask;
	int i;
	BOOL found = False;

	se_priv_copy( privileges, &se_priv_none );
	
	for ( i=0; i<scount; i++ ) {
		/* don't add unless we actually have a privilege assigned */

		if ( !get_privileges( &slist[i], &mask ) )
			continue;

		DEBUG(5,("get_privileges_for_sids: sid = %s\nPrivilege set:\n", 
			sid_string_static(&slist[i])));
		dump_se_priv( DBGC_ALL, 5, &mask );
			
		se_priv_add( privileges, &mask );
		found = True;
	}

	return found;
}


/*********************************************************************
 travseral functions for privilege_enumerate_accounts
*********************************************************************/

static int priv_traverse_fn(TDB_CONTEXT *t, TDB_DATA key, TDB_DATA data, void *state)
{
	PRIV_SID_LIST *priv = (PRIV_SID_LIST *)state;
	int  prefixlen = strlen(PRIVPREFIX);
	DOM_SID sid;
	fstring sid_string;
	
	/* easy check first */
	
	if ( data.dsize != sizeof(SE_PRIV) )
		return 0;

	/* check we have a PRIV_+SID entry */

	if ( strncmp(key.dptr, PRIVPREFIX, prefixlen) != 0)
		return 0;
		
	/* check to see if we are looking for a particular privilege */

	if ( !se_priv_equal(&priv->privilege, &se_priv_none) ) {
		SE_PRIV mask;
		
		se_priv_copy( &mask, (SE_PRIV*)data.dptr );
		
		/* if the SID does not have the specified privilege 
		   then just return */
		   
		if ( !is_privilege_assigned( &mask, &priv->privilege) )
			return 0;
	}
		
	fstrcpy( sid_string, &key.dptr[strlen(PRIVPREFIX)] );

	/* this is a last ditch safety check to preventing returning
	   and invalid SID (i've somehow run into this on development branches) */

	if ( strcmp( "S-0-0", sid_string ) == 0 )
		return 0;

	if ( !string_to_sid(&sid, sid_string) ) {
		DEBUG(0,("travsersal_fn_enum__acct: Could not convert SID [%s]\n",
			sid_string));
		return 0;
	}

	if (!add_sid_to_array( NULL, &sid, &priv->sids.list, &priv->sids.count )) {
		return 0;
	}
	
	return 0;
}

/*********************************************************************
 Retreive list of privileged SIDs (for _lsa_enumerate_accounts()
*********************************************************************/

NTSTATUS privilege_enumerate_accounts(DOM_SID **sids, int *num_sids)
{
	TDB_CONTEXT *tdb = get_account_pol_tdb();
	PRIV_SID_LIST priv;
	
	if (!tdb) {
		return NT_STATUS_ACCESS_DENIED;
	}

	ZERO_STRUCT(priv);

	se_priv_copy( &priv.privilege, &se_priv_none );

	tdb_traverse( tdb, priv_traverse_fn, &priv);

	/* give the memory away; caller will free */
	
	*sids      = priv.sids.list;
	*num_sids  = priv.sids.count;

	return NT_STATUS_OK;
}

/***************************************************************************
 Add privilege to sid
****************************************************************************/

BOOL grant_privilege(const DOM_SID *sid, const SE_PRIV *priv_mask)
{
	SE_PRIV old_mask, new_mask;
	
	ZERO_STRUCT( old_mask );
	ZERO_STRUCT( new_mask );

	if ( get_privileges( sid, &old_mask ) )
		se_priv_copy( &new_mask, &old_mask );
	else
		se_priv_copy( &new_mask, &se_priv_none );

	se_priv_add( &new_mask, priv_mask );

	DEBUG(10,("grant_privilege: %s\n", sid_string_static(sid)));
	
	DEBUGADD( 10, ("original privilege mask:\n"));
	dump_se_priv( DBGC_ALL, 10, &old_mask );
	
	DEBUGADD( 10, ("new privilege mask:\n"));
	dump_se_priv( DBGC_ALL, 10, &new_mask );
	
	return set_privileges( sid, &new_mask );
}

/*********************************************************************
 Add a privilege based on its name
*********************************************************************/

BOOL grant_privilege_by_name(DOM_SID *sid, const char *name)
{
	int i;

	for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
		if ( strequal(privs[i].name, name) ) {
			return grant_privilege( sid, &privs[i].se_priv );
                }
        }

        DEBUG(3, ("grant_privilege_by_name: No Such Privilege Found (%s)\n", name));

        return False;
}

/***************************************************************************
 Remove privilege from sid
****************************************************************************/

BOOL revoke_privilege(const DOM_SID *sid, const SE_PRIV *priv_mask)
{
	SE_PRIV mask;
	
	/* if the user has no privileges, then we can't revoke any */
	
	if ( !get_privileges( sid, &mask ) )
		return True;
	
	DEBUG(10,("revoke_privilege: %s\n", sid_string_static(sid)));
	
	DEBUGADD( 10, ("original privilege mask:\n"));
	dump_se_priv( DBGC_ALL, 10, &mask );

	se_priv_remove( &mask, priv_mask );
	
	DEBUGADD( 10, ("new privilege mask:\n"));
	dump_se_priv( DBGC_ALL, 10, &mask );
	
	return set_privileges( sid, &mask );
}

/*********************************************************************
 Revoke all privileges
*********************************************************************/

BOOL revoke_all_privileges( DOM_SID *sid )
{
	return revoke_privilege( sid, &se_priv_all );
}

/*********************************************************************
 Add a privilege based on its name
*********************************************************************/

BOOL revoke_privilege_by_name(DOM_SID *sid, const char *name)
{
	int i;

	for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
		if ( strequal(privs[i].name, name) ) {
			return revoke_privilege( sid, &privs[i].se_priv );
                }
        }

        DEBUG(3, ("revoke_privilege_by_name: No Such Privilege Found (%s)\n", name));

        return False;
}

/***************************************************************************
 Retrieve the SIDs assigned to a given privilege
****************************************************************************/

NTSTATUS privilege_create_account(const DOM_SID *sid )
{
	return ( grant_privilege(sid, &se_priv_none) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL);
}

/****************************************************************************
 initialise a privilege list and set the talloc context 
 ****************************************************************************/
 
NTSTATUS privilege_set_init(PRIVILEGE_SET *priv_set)
{
	TALLOC_CTX *mem_ctx;
	
	ZERO_STRUCTP( priv_set );

	mem_ctx = talloc_init("privilege set");
	if ( !mem_ctx ) {
		DEBUG(0,("privilege_set_init: failed to initialize talloc ctx!\n"));
		return NT_STATUS_NO_MEMORY;
	}

	priv_set->mem_ctx = mem_ctx;

	return NT_STATUS_OK;
}

/****************************************************************************
  initialise a privilege list and with someone else's talloc context 
****************************************************************************/

NTSTATUS privilege_set_init_by_ctx(TALLOC_CTX *mem_ctx, PRIVILEGE_SET *priv_set)
{
	ZERO_STRUCTP( priv_set );
	
	priv_set->mem_ctx = mem_ctx;
	priv_set->ext_ctx = True;

	return NT_STATUS_OK;
}

/****************************************************************************
 Free all memory used by a PRIVILEGE_SET
****************************************************************************/

void privilege_set_free(PRIVILEGE_SET *priv_set)
{
	if ( !priv_set )
		return;

	if ( !( priv_set->ext_ctx ) )
		talloc_destroy( priv_set->mem_ctx );

	ZERO_STRUCTP( priv_set );
}

/****************************************************************************
 duplicate alloc luid_attr
 ****************************************************************************/

NTSTATUS dup_luid_attr(TALLOC_CTX *mem_ctx, LUID_ATTR **new_la, LUID_ATTR *old_la, int count)
{
	int i;

	if ( !old_la )
		return NT_STATUS_OK;

	*new_la = TALLOC_ARRAY(mem_ctx, LUID_ATTR, count);
	if ( !*new_la ) {
		DEBUG(0,("dup_luid_attr: failed to alloc new LUID_ATTR array [%d]\n", count));
		return NT_STATUS_NO_MEMORY;
	}

	for (i=0; i<count; i++) {
		(*new_la)[i].luid.high = old_la[i].luid.high;
		(*new_la)[i].luid.low = old_la[i].luid.low;
		(*new_la)[i].attr = old_la[i].attr;
	}
	
	return NT_STATUS_OK;
}

/****************************************************************************
 Does the user have the specified privilege ?  We only deal with one privilege
 at a time here.
*****************************************************************************/

BOOL user_has_privileges(const NT_USER_TOKEN *token, const SE_PRIV *privilege)
{
	if ( !token )
		return False;

	return is_privilege_assigned( &token->privileges, privilege );
}

/****************************************************************************
 Does the user have any of the specified privileges ?  We only deal with one privilege
 at a time here.
*****************************************************************************/

BOOL user_has_any_privilege(NT_USER_TOKEN *token, const SE_PRIV *privilege)
{
	if ( !token )
		return False;

	return is_any_privilege_assigned( &token->privileges, privilege );
}

/****************************************************************************
 Convert a LUID to a named string
****************************************************************************/

char* luid_to_privilege_name(const LUID *set)
{
	static fstring name;
	int i;

	if (set->high != 0)
		return NULL;

	for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
		if ( set->low == privs[i].luid.low ) {
			fstrcpy( name, privs[i].name );
			return name;
		}
	}
	
	return NULL;
}

/*******************************************************************
 return the number of elements in the privlege array
*******************************************************************/

int count_all_privileges( void )
{
	static int count;
	
	if ( count )
		return count;

	/* loop over the array and count it */	
	for ( count=0; !se_priv_equal(&privs[count].se_priv, &se_priv_end); count++ ) ;

	return count;
}

/*******************************************************************
*******************************************************************/

BOOL se_priv_to_privilege_set( PRIVILEGE_SET *set, SE_PRIV *mask )
{
	int i;
	uint32 num_privs = count_all_privileges();
	LUID_ATTR luid;
	
	luid.attr = 0;
	luid.luid.high = 0;
	
	for ( i=0; i<num_privs; i++ ) {
		if ( !is_privilege_assigned(mask, &privs[i].se_priv) )
			continue;
		
		luid.luid = privs[i].luid;
		
		if ( !privilege_set_add( set, luid ) )
			return False;
	}

	return True;
}

/*******************************************************************
*******************************************************************/

static BOOL luid_to_se_priv( LUID *luid, SE_PRIV *mask )
{
	int i;
	uint32 num_privs = count_all_privileges();
	
	for ( i=0; i<num_privs; i++ ) {
		if ( luid->low == privs[i].luid.low ) {
			se_priv_copy( mask, &privs[i].se_priv );
			return True;
		}
	}

	return False;
}

/*******************************************************************
*******************************************************************/

BOOL privilege_set_to_se_priv( SE_PRIV *mask, PRIVILEGE_SET *privset )
{
	int i;
	
	ZERO_STRUCTP( mask );
	
	for ( i=0; i<privset->count; i++ ) {
		SE_PRIV r;
	
		/* sanity check for invalid privilege.  we really
		   only care about the low 32 bits */
		   
		if ( privset->set[i].luid.high != 0 )
			return False;
		
		if ( luid_to_se_priv( &privset->set[i].luid, &r ) )		
			se_priv_add( mask, &r );
	}

	return True;
}

/*******************************************************************
*******************************************************************/

BOOL is_privileged_sid( const DOM_SID *sid )
{
	SE_PRIV mask;
	
	return get_privileges( sid, &mask );
}

/*******************************************************************
*******************************************************************/

BOOL grant_all_privileges( const DOM_SID *sid )
{
	int i;
	SE_PRIV mask;
	uint32 num_privs = count_all_privileges();

	se_priv_copy( &mask, &se_priv_none );
	
	for ( i=0; i<num_privs; i++ ) {
		se_priv_add(&mask, &privs[i].se_priv); 
	}

	return grant_privilege( sid, &mask );
}