summaryrefslogtreecommitdiff
path: root/source3/rpc_server/srv_reg_nt.c
blob: 07ebe4e20cccb046e82d1d5b803f8e4b66a7092a (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
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
/* 
 *  Unix SMB/CIFS implementation.
 *  RPC Pipe client / server routines
 *  Copyright (C) Andrew Tridgell               1992-1997.
 *  Copyright (C) Luke Kenneth Casson Leighton  1996-1997.
 *  Copyright (C) Paul Ashton                        1997.
 *  Copyright (C) Jeremy Allison                     2001.
 *  Copyright (C) Gerald Carter                      2002-2005.
 *
 *  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.
 */

/* Implementation of registry functions. */

#include "includes.h"
#include "regfio.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_SRV

#define OUR_HANDLE(hnd) (((hnd)==NULL)?"NULL":(IVAL((hnd)->data5,4)==(uint32)sys_getpid()?"OURS":"OTHER")), \
((unsigned int)IVAL((hnd)->data5,4)),((unsigned int)sys_getpid())


static struct generic_mapping reg_generic_map = { REG_KEY_READ, REG_KEY_WRITE, REG_KEY_EXECUTE, REG_KEY_ALL };

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

NTSTATUS registry_access_check( SEC_DESC *sec_desc, NT_USER_TOKEN *token, 
                                     uint32 access_desired, uint32 *access_granted )
{
	NTSTATUS result;
		
	se_map_generic( &access_desired, &reg_generic_map );
	se_access_check( sec_desc, token, access_desired, access_granted, &result );
	
	return result;
}

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

SEC_DESC* construct_registry_sd( TALLOC_CTX *ctx )
{
	SEC_ACE ace[2];	
	SEC_ACCESS mask;
	size_t i = 0;
	SEC_DESC *sd;
	SEC_ACL *acl;
	uint32 sd_size;

	/* basic access for Everyone */
	
	init_sec_access(&mask, REG_KEY_READ );
	init_sec_ace(&ace[i++], &global_sid_World, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
	
	/* Full Access 'BUILTIN\Administrators' */
	
	init_sec_access(&mask, REG_KEY_ALL );
	init_sec_ace(&ace[i++], &global_sid_Builtin_Administrators, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
	
	
	/* create the security descriptor */
	
	if ( !(acl = make_sec_acl(ctx, NT4_ACL_REVISION, i, ace)) )
		return NULL;

	if ( !(sd = make_sec_desc(ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE, NULL, NULL, NULL, acl, &sd_size)) )
		return NULL;

	return sd;
}

/******************************************************************
 free() function for REGISTRY_KEY
 *****************************************************************/
 
static void free_regkey_info(void *ptr)
{
	REGISTRY_KEY *info = (REGISTRY_KEY*)ptr;
	
	SAFE_FREE(info);
}

/******************************************************************
 Find a registry key handle and return a REGISTRY_KEY
 *****************************************************************/

static REGISTRY_KEY *find_regkey_index_by_hnd(pipes_struct *p, POLICY_HND *hnd)
{
	REGISTRY_KEY *regkey = NULL;

	if(!find_policy_by_hnd(p,hnd,(void **)&regkey)) {
		DEBUG(2,("find_regkey_index_by_hnd: Registry Key not found: "));
		return NULL;
	}

	return regkey;
}


/*******************************************************************
 Function for open a new registry handle and creating a handle 
 Note that P should be valid & hnd should already have space
 
 When we open a key, we store the full path to the key as 
 HK[LM|U]\<key>\<key>\...
 *******************************************************************/
 
static WERROR open_registry_key(pipes_struct *p, POLICY_HND *hnd, REGISTRY_KEY *parent,
				const char *subkeyname, uint32 access_granted  )
{
	REGISTRY_KEY 	*regkey = NULL;
	WERROR     	result = WERR_OK;
	REGSUBKEY_CTR	*subkeys = NULL;
	pstring		subkeyname2;
	int		subkey_len;
	
	DEBUG(7,("open_registry_key: name = [%s][%s]\n", 
		parent ? parent->name : "NULL", subkeyname));

	/* strip any trailing '\'s */
	pstrcpy( subkeyname2, subkeyname );
	subkey_len = strlen ( subkeyname2 );
	if ( subkey_len && subkeyname2[subkey_len-1] == '\\' )
		subkeyname2[subkey_len-1] = '\0';

	if ((regkey=SMB_MALLOC_P(REGISTRY_KEY)) == NULL)
		return WERR_NOMEM;
		
	ZERO_STRUCTP( regkey );
	
	/* 
	 * very crazy, but regedit.exe on Win2k will attempt to call 
	 * REG_OPEN_ENTRY with a keyname of "".  We should return a new 
	 * (second) handle here on the key->name.  regedt32.exe does 
	 * not do this stupidity.   --jerry
	 */
	
	if ( !subkey_len ) {
		pstrcpy( regkey->name, parent->name );	
	}
	else {
		pstrcpy( regkey->name, "" );
		if ( parent ) {
			pstrcat( regkey->name, parent->name );
			pstrcat( regkey->name, "\\" );
		}
		pstrcat( regkey->name, subkeyname2 );
	}
	
	/* Look up the table of registry I/O operations */

	if ( !(regkey->hook = reghook_cache_find( regkey->name )) ) {
		DEBUG(0,("open_registry_key: Failed to assigned a REGISTRY_HOOK to [%s]\n",
			regkey->name ));
		result = WERR_BADFILE;
		goto done;
	}
	
	/* check if the path really exists; failed is indicated by -1 */
	/* if the subkey count failed, bail out */

	if ( !(subkeys = TALLOC_ZERO_P( p->mem_ctx, REGSUBKEY_CTR )) ) {
		result = WERR_NOMEM;
		goto done;
	}

	if ( fetch_reg_keys( regkey, subkeys ) == -1 )  {
		result = WERR_BADFILE;
		goto done;
	}
		
	if ( !create_policy_hnd( p, hnd, free_regkey_info, regkey ) ) {
		result = WERR_BADFILE; 
		goto done;
	}
	
	/* save the access mask */

	regkey->access_granted = access_granted;
	
done:
	/* clean up */

	TALLOC_FREE( subkeys );
	
	if ( ! NT_STATUS_IS_OK(result) )
		SAFE_FREE( regkey );
	
	DEBUG(7,("open_registry_key: exit\n"));

	return result;
}

/*******************************************************************
 Function for open a new registry handle and creating a handle 
 Note that P should be valid & hnd should already have space
 *******************************************************************/

static BOOL close_registry_key(pipes_struct *p, POLICY_HND *hnd)
{
	REGISTRY_KEY *regkey = find_regkey_index_by_hnd(p, hnd);
	
	if ( !regkey ) {
		DEBUG(2,("close_registry_key: Invalid handle (%s:%u:%u)\n", OUR_HANDLE(hnd)));
		return False;
	}
	
	close_policy_hnd(p, hnd);
	
	return True;
}

/********************************************************************
 retrieve information about the subkeys
 *******************************************************************/
 
static BOOL get_subkey_information( REGISTRY_KEY *key, uint32 *maxnum, uint32 *maxlen )
{
	int 		num_subkeys, i;
	uint32 		max_len;
	REGSUBKEY_CTR 	*subkeys;
	uint32 		len;
	
	if ( !key )
		return False;

	if ( !(subkeys = TALLOC_ZERO_P( NULL, REGSUBKEY_CTR )) )
		return False;

	if ( fetch_reg_keys( key, subkeys ) == -1 )
		return False;

	/* find the longest string */
	
	max_len = 0;
	num_subkeys = regsubkey_ctr_numkeys( subkeys );
	
	for ( i=0; i<num_subkeys; i++ ) {
		len = strlen( regsubkey_ctr_specific_key(subkeys, i) );
		max_len = MAX(max_len, len);
	}

	*maxnum = num_subkeys;
	*maxlen = max_len*2;
	
	TALLOC_FREE( subkeys );
	
	return True;
}

/********************************************************************
 retrieve information about the values.  
 *******************************************************************/
 
static BOOL get_value_information( REGISTRY_KEY *key, uint32 *maxnum, 
                                    uint32 *maxlen, uint32 *maxsize )
{
	REGVAL_CTR 	*values;
	REGISTRY_VALUE	*val;
	uint32 		sizemax, lenmax;
	int 		i, num_values;
	
	if ( !key )
		return False;

	if ( !(values = TALLOC_ZERO_P( NULL, REGVAL_CTR )) )
		return False;
	
	if ( fetch_reg_values( key, values ) == -1 )
		return False;
	
	lenmax = sizemax = 0;
	num_values = regval_ctr_numvals( values );
	
	val = regval_ctr_specific_value( values, 0 );
	
	for ( i=0; i<num_values && val; i++ ) 
	{
		lenmax  = MAX(lenmax,  val->valuename ? strlen(val->valuename)+1 : 0 );
		sizemax = MAX(sizemax, val->size );
		
		val = regval_ctr_specific_value( values, i );
	}

	*maxnum   = num_values;
	*maxlen   = lenmax;
	*maxsize  = sizemax;
	
	TALLOC_FREE( values );
	
	return True;
}


/********************************************************************
 reg_close
 ********************************************************************/

WERROR _reg_close(pipes_struct *p, REG_Q_CLOSE *q_u, REG_R_CLOSE *r_u)
{
	/* close the policy handle */

	if (!close_registry_key(p, &q_u->pol))
		return WERR_BADFID; 

	return WERR_OK;
}

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

WERROR _reg_open_hklm(pipes_struct *p, REG_Q_OPEN_HIVE *q_u, REG_R_OPEN_HIVE *r_u)
{
	SEC_DESC *sec_desc;
	uint32 access_granted = 0;
	NTSTATUS status;
	
	/* perform access checks */
	/* top level keys are done here without passing through the REGISTRY_HOOK api */
	
	if ( !(sec_desc = construct_registry_sd( p->mem_ctx )) )
		return WERR_NOMEM;
		
	status = registry_access_check( sec_desc, p->pipe_user.nt_user_token, q_u->access, &access_granted );
	if ( !NT_STATUS_IS_OK(status) )
		return ntstatus_to_werror( status );
		
	return open_registry_key( p, &r_u->pol, NULL, KEY_HKLM, access_granted );
}

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

WERROR _reg_open_hkcr(pipes_struct *p, REG_Q_OPEN_HIVE *q_u, REG_R_OPEN_HIVE *r_u)
{
	SEC_DESC *sec_desc;
	uint32 access_granted = 0;
	NTSTATUS status;
	
	/* perform access checks */
	/* top level keys are done here without passing through the REGISTRY_HOOK api */
	
	if ( !(sec_desc = construct_registry_sd( p->mem_ctx )) )
		return WERR_NOMEM;
		
	status = registry_access_check( sec_desc, p->pipe_user.nt_user_token, q_u->access, &access_granted );
	if ( !NT_STATUS_IS_OK(status) )
		return ntstatus_to_werror( status );
		
	return open_registry_key( p, &r_u->pol, NULL, KEY_HKCR, access_granted );
}

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

WERROR _reg_open_hku(pipes_struct *p, REG_Q_OPEN_HIVE *q_u, REG_R_OPEN_HIVE *r_u)
{
	SEC_DESC *sec_desc;
	uint32 access_granted = 0;
	NTSTATUS status;
	
	/* perform access checks */
	/* top level keys are done here without passing through the REGISTRY_HOOK api */
	
	if ( !(sec_desc = construct_registry_sd( p->mem_ctx )) )
		return WERR_NOMEM;
		
	status = registry_access_check( sec_desc, p->pipe_user.nt_user_token, q_u->access, &access_granted );
	if ( !NT_STATUS_IS_OK(status) )
		return ntstatus_to_werror( status );
		
	return open_registry_key( p, &r_u->pol, NULL, KEY_HKU, access_granted );
}

/*******************************************************************
 reg_reply_open_entry
 ********************************************************************/

WERROR _reg_open_entry(pipes_struct *p, REG_Q_OPEN_ENTRY *q_u, REG_R_OPEN_ENTRY *r_u)
{
	fstring name;
	REGISTRY_KEY *parent = find_regkey_index_by_hnd(p, &q_u->pol);
	REGISTRY_KEY *newkey;
	uint32 access_granted;
	WERROR result;

	if ( !parent )
		return WERR_BADFID;

	rpcstr_pull( name, q_u->name.string->buffer, sizeof(name), q_u->name.string->uni_str_len*2, 0 );
	
	/* check granted access first; what is the correct mask here? */

	if ( !(parent->access_granted & (SEC_RIGHTS_ENUM_SUBKEYS|SEC_RIGHTS_CREATE_SUBKEY|SEC_RIGHTS_QUERY_VALUE|SEC_RIGHTS_SET_VALUE)) )
		return WERR_ACCESS_DENIED;
	
	/* open the key first to get the appropriate REGISTRY_HOOK 
	   and then check the premissions */

	if ( !W_ERROR_IS_OK(result = open_registry_key( p, &r_u->handle, parent, name, 0 )) )
		return result;

	newkey = find_regkey_index_by_hnd(p, &r_u->handle);

	/* finally allow the backend to check the access for the requested key */

	if ( !regkey_access_check( newkey, q_u->access, &access_granted, p->pipe_user.nt_user_token ) ) {
		close_registry_key( p, &r_u->handle );
		return WERR_ACCESS_DENIED;
	}

	/* if successful, save the granted access mask */

	newkey->access_granted = access_granted;
	
	return WERR_OK;
}

/*******************************************************************
 reg_reply_info
 ********************************************************************/

WERROR _reg_query_value(pipes_struct *p, REG_Q_QUERY_VALUE *q_u, REG_R_QUERY_VALUE *r_u)
{
	WERROR			status = WERR_BADFILE;
	fstring 		name;
	REGISTRY_KEY 		*regkey = find_regkey_index_by_hnd( p, &q_u->pol );
	REGISTRY_VALUE		*val = NULL;
	REGVAL_CTR		*regvals;
	int			i;

	if ( !regkey )
		return WERR_BADFID;
		
	DEBUG(7,("_reg_info: policy key name = [%s]\n", regkey->name));
	
	rpcstr_pull(name, q_u->name.string->buffer, sizeof(name), q_u->name.string->uni_str_len*2, 0);

	DEBUG(5,("reg_info: looking up value: [%s]\n", name));

	if ( !(regvals = TALLOC_P( p->mem_ctx, REGVAL_CTR )) ) 
		return WERR_NOMEM;
	
	for ( i=0; fetch_reg_values_specific(regkey, &val, i); i++ ) 
	{
		DEBUG(10,("_reg_info: Testing value [%s]\n", val->valuename));
		if ( strequal( val->valuename, name ) ) {
			DEBUG(10,("_reg_info: Found match for value [%s]\n", name));
			status = WERR_OK;
			break;
		}
		
		free_registry_value( val );
	}

	init_reg_r_query_value(q_u->ptr_buf, r_u, val, status);
	
	TALLOC_FREE( regvals );
	free_registry_value( val );

	return status;
}


/*****************************************************************************
 Implementation of REG_QUERY_KEY
 ****************************************************************************/
 
WERROR _reg_query_key(pipes_struct *p, REG_Q_QUERY_KEY *q_u, REG_R_QUERY_KEY *r_u)
{
	WERROR 	status = WERR_OK;
	REGISTRY_KEY	*regkey = find_regkey_index_by_hnd( p, &q_u->pol );
	
	if ( !regkey )
		return WERR_BADFID; 
	
	if ( !get_subkey_information( regkey, &r_u->num_subkeys, &r_u->max_subkeylen ) ) {
		DEBUG(0,("_reg_query_key: get_subkey_information() failed!\n"));
		return WERR_ACCESS_DENIED;
	}
		
	if ( !get_value_information( regkey, &r_u->num_values, &r_u->max_valnamelen, &r_u->max_valbufsize ) ) {
		DEBUG(0,("_reg_query_key: get_value_information() failed!\n"));
		return WERR_ACCESS_DENIED;	
	}

		
	r_u->sec_desc = 0x00000078;	/* size for key's sec_desc */
	
	/* Win9x set this to 0x0 since it does not keep timestamps.
	   Doing the same here for simplicity   --jerry */
	   
	ZERO_STRUCT(r_u->mod_time);	

	return status;
}


/*****************************************************************************
 Implementation of REG_GETVERSION
 ****************************************************************************/
 
WERROR _reg_getversion(pipes_struct *p, REG_Q_GETVERSION *q_u, REG_R_GETVERSION *r_u)
{
	WERROR 	status = WERR_OK;
	REGISTRY_KEY	*regkey = find_regkey_index_by_hnd( p, &q_u->pol );
	
	if ( !regkey )
		return WERR_BADFID;
	
	r_u->win_version = 0x00000005;	/* Windows 2000 registry API version */
	
	return status;
}


/*****************************************************************************
 Implementation of REG_ENUM_KEY
 ****************************************************************************/
 
WERROR _reg_enum_key(pipes_struct *p, REG_Q_ENUM_KEY *q_u, REG_R_ENUM_KEY *r_u)
{
	WERROR 	status = WERR_OK;
	REGISTRY_KEY	*regkey = find_regkey_index_by_hnd( p, &q_u->pol );
	char		*subkey = NULL;
	
	
	if ( !regkey )
		return WERR_BADFID; 

	DEBUG(8,("_reg_enum_key: enumerating key [%s]\n", regkey->name));
	
	if ( !fetch_reg_keys_specific( regkey, &subkey, q_u->key_index ) )
	{
		status = WERR_NO_MORE_ITEMS;
		goto done;
	}
	
	DEBUG(10,("_reg_enum_key: retrieved subkey named [%s]\n", subkey));
	
	/* subkey has the string name now */
	
	init_reg_r_enum_key( r_u, subkey );
	
done:	
	SAFE_FREE( subkey );
	return status;
}

/*****************************************************************************
 Implementation of REG_ENUM_VALUE
 ****************************************************************************/
 
WERROR _reg_enum_value(pipes_struct *p, REG_Q_ENUM_VALUE *q_u, REG_R_ENUM_VALUE *r_u)
{
	WERROR 	status = WERR_OK;
	REGISTRY_KEY	*regkey = find_regkey_index_by_hnd( p, &q_u->pol );
	REGISTRY_VALUE	*val;
	
	
	if ( !regkey )
		return WERR_BADFID; 

	DEBUG(8,("_reg_enum_value: enumerating values for key [%s]\n", regkey->name));

	if ( !fetch_reg_values_specific( regkey, &val, q_u->val_index ) ) {
		status = WERR_NO_MORE_ITEMS;
		goto done;
	}
	
	DEBUG(10,("_reg_enum_value: retrieved value named  [%s]\n", val->valuename));
	
	/* subkey has the string name now */
	
	init_reg_r_enum_val( r_u, val );

done:	
	free_registry_value( val );
	
	return status;
}


/*******************************************************************
 reg_shutdwon
 ********************************************************************/

WERROR _reg_shutdown(pipes_struct *p, REG_Q_SHUTDOWN *q_u, REG_R_SHUTDOWN *r_u)
{
	REG_Q_SHUTDOWN_EX q_u_ex;
	REG_R_SHUTDOWN_EX r_u_ex;
	
	/* copy fields (including stealing memory) */
	
	q_u_ex.server  = q_u->server;
	q_u_ex.message = q_u->message;
	q_u_ex.timeout = q_u->timeout;
	q_u_ex.force   = q_u->force;
	q_u_ex.reboot  = q_u->reboot;
	q_u_ex.reason  = 0x0; 	/* don't care for now */
	
	/* thunk down to _reg_shutdown_ex() (just returns a status) */
	
	return _reg_shutdown_ex( p, &q_u_ex, &r_u_ex );
}

/*******************************************************************
 reg_shutdown_ex
 ********************************************************************/

#define SHUTDOWN_R_STRING "-r"
#define SHUTDOWN_F_STRING "-f"


WERROR _reg_shutdown_ex(pipes_struct *p, REG_Q_SHUTDOWN_EX *q_u, REG_R_SHUTDOWN_EX *r_u)
{
	pstring shutdown_script;
	pstring message;
	pstring chkmsg;
	fstring timeout;
	fstring reason;
	fstring r;
	fstring f;
	int ret;
	BOOL can_shutdown;
	

 	pstrcpy(shutdown_script, lp_shutdown_script());
	
	if ( !*shutdown_script )
		return WERR_ACCESS_DENIED;

	/* pull the message string and perform necessary sanity checks on it */

	pstrcpy( message, "" );
	if ( q_u->message ) {
		UNISTR2 *msg_string = q_u->message->string;
		
		rpcstr_pull( message, msg_string->buffer, sizeof(message), msg_string->uni_str_len*2, 0 );
	}
	alpha_strcpy (chkmsg, message, NULL, sizeof(message));
		
	fstr_sprintf(timeout, "%d", q_u->timeout);
	fstr_sprintf(r, (q_u->reboot) ? SHUTDOWN_R_STRING : "");
	fstr_sprintf(f, (q_u->force) ? SHUTDOWN_F_STRING : "");
	fstr_sprintf( reason, "%d", q_u->reason );

	all_string_sub( shutdown_script, "%z", chkmsg, sizeof(shutdown_script) );
	all_string_sub( shutdown_script, "%t", timeout, sizeof(shutdown_script) );
	all_string_sub( shutdown_script, "%r", r, sizeof(shutdown_script) );
	all_string_sub( shutdown_script, "%f", f, sizeof(shutdown_script) );
	all_string_sub( shutdown_script, "%x", reason, sizeof(shutdown_script) );

	can_shutdown = user_has_privileges( p->pipe_user.nt_user_token, &se_remote_shutdown );
		
	/* IF someone has privs, run the shutdown script as root. OTHERWISE run it as not root
	   Take the error return from the script and provide it as the Windows return code. */
	   
	/********** BEGIN SeRemoteShutdownPrivilege BLOCK **********/
	
	if ( can_shutdown ) 
		become_root();

	ret = smbrun( shutdown_script, NULL );
		
	if ( can_shutdown )
		unbecome_root();

	/********** END SeRemoteShutdownPrivilege BLOCK **********/
	
	DEBUG(3,("_reg_shutdown_ex: Running the command `%s' gave %d\n",
		shutdown_script, ret));
		

	return (ret == 0) ? WERR_OK : WERR_ACCESS_DENIED;
}




/*******************************************************************
 reg_abort_shutdwon
 ********************************************************************/

WERROR _reg_abort_shutdown(pipes_struct *p, REG_Q_ABORT_SHUTDOWN *q_u, REG_R_ABORT_SHUTDOWN *r_u)
{
	pstring abort_shutdown_script;
	int ret;
	BOOL can_shutdown;

	pstrcpy(abort_shutdown_script, lp_abort_shutdown_script());

	if ( !*abort_shutdown_script )
		return WERR_ACCESS_DENIED;
		
	can_shutdown = user_has_privileges( p->pipe_user.nt_user_token, &se_remote_shutdown );
		
	/********** BEGIN SeRemoteShutdownPrivilege BLOCK **********/
	
	if ( can_shutdown )
		become_root();
		
	ret = smbrun( abort_shutdown_script, NULL );
	
	if ( can_shutdown )
		unbecome_root();
		
	/********** END SeRemoteShutdownPrivilege BLOCK **********/

	DEBUG(3,("_reg_abort_shutdown: Running the command `%s' gave %d\n",
		abort_shutdown_script, ret));
		

	return (ret == 0) ? WERR_OK : WERR_ACCESS_DENIED;
}

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

static int validate_reg_filename( pstring fname )
{
	char *p;
	int num_services = lp_numservices();
	int snum;
	pstring share_path;
	pstring unix_fname;
	
	/* convert to a unix path, stripping the C:\ along the way */
	
	if ( !(p = valid_share_pathname( fname ) ))
		return -1;

	/* has to exist within a valid file share */
			
	for ( snum=0; snum<num_services; snum++ ) {
	
		if ( !lp_snum_ok(snum) || lp_print_ok(snum) )
			continue;
		
		pstrcpy( share_path, lp_pathname(snum) );

		/* make sure we have a path (e.g. [homes] ) */

		if ( strlen( share_path ) == 0 )
			continue;

		if ( strncmp( share_path, p, strlen( share_path )) == 0 )
			break;
	}
	
	/* p and fname are overlapping memory so copy out and back in again */
	
	pstrcpy( unix_fname, p );
	pstrcpy( fname, unix_fname );
	
	return (snum < num_services) ? snum : -1;
}

/*******************************************************************
 Note: topkeypat is the *full* path that this *key will be 
 loaded into (including the name of the key)
 ********************************************************************/

static WERROR reg_load_tree( REGF_FILE *regfile, const char *topkeypath,
                             REGF_NK_REC *key )
{
	REGF_NK_REC *subkey;
	REGISTRY_KEY registry_key;
	REGVAL_CTR *values;
	REGSUBKEY_CTR *subkeys;
	int i;
	pstring path;
	WERROR result = WERR_OK;
	
	/* initialize the REGISTRY_KEY structure */
	
	if ( !(registry_key.hook = reghook_cache_find(topkeypath)) ) {
		DEBUG(0,("reg_load_tree: Failed to assigned a REGISTRY_HOOK to [%s]\n",
			topkeypath ));
		return WERR_BADFILE;
	}
	pstrcpy( registry_key.name, topkeypath );
	
	/* now start parsing the values and subkeys */

	if ( !(subkeys = TALLOC_ZERO_P( regfile->mem_ctx, REGSUBKEY_CTR )) )
		return WERR_NOMEM;
	
	if ( !(values = TALLOC_ZERO_P( subkeys, REGVAL_CTR )) )
		return WERR_NOMEM;

	/* copy values into the REGVAL_CTR */
	
	for ( i=0; i<key->num_values; i++ ) {
		regval_ctr_addvalue( values, key->values[i].valuename, key->values[i].type,
			(char*)key->values[i].data, (key->values[i].data_size & ~VK_DATA_IN_OFFSET) );
	}

	/* copy subkeys into the REGSUBKEY_CTR */
	
	key->subkey_index = 0;
	while ( (subkey = regfio_fetch_subkey( regfile, key )) ) {
		regsubkey_ctr_addkey( subkeys, subkey->keyname );
	}
	
	/* write this key and values out */
	
	if ( !store_reg_values( &registry_key, values ) 
		|| !store_reg_keys( &registry_key, subkeys ) )
	{
		DEBUG(0,("reg_load_tree: Failed to load %s!\n", topkeypath));
		result = WERR_REG_IO_FAILURE;
	}
	
	TALLOC_FREE( subkeys );
	
	if ( !W_ERROR_IS_OK(result) )
		return result;
	
	/* now continue to load each subkey registry tree */

	key->subkey_index = 0;
	while ( (subkey = regfio_fetch_subkey( regfile, key )) ) {
		pstr_sprintf( path, "%s%s%s", topkeypath, "\\", subkey->keyname );
		result = reg_load_tree( regfile, path, subkey );
		if ( !W_ERROR_IS_OK(result) )
			break;
	}

	return result;
}

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

static WERROR restore_registry_key ( REGISTRY_KEY *krecord, const char *fname )
{
	REGF_FILE *regfile;
	REGF_NK_REC *rootkey;
	WERROR result;
		
	/* open the registry file....fail if the file already exists */
	
	if ( !(regfile = regfio_open( fname, (O_RDONLY), 0 )) ) {
                DEBUG(0,("backup_registry_key: failed to open \"%s\" (%s)\n", 
			fname, strerror(errno) ));
		return ( ntstatus_to_werror(map_nt_error_from_unix( errno )) );
        }
	
	/* get the rootkey from the regf file and then load the tree
	   via recursive calls */
	   
	if ( !(rootkey = regfio_rootkey( regfile )) )
		return WERR_REG_FILE_INVALID;
	
	result = reg_load_tree( regfile, krecord->name, rootkey );
		
	/* cleanup */
	
	regfio_close( regfile );
	
	return result;
}

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

WERROR _reg_restore_key(pipes_struct *p, REG_Q_RESTORE_KEY  *q_u, REG_R_RESTORE_KEY *r_u)
{
	REGISTRY_KEY	*regkey = find_regkey_index_by_hnd( p, &q_u->pol );
	pstring         filename;
	int             snum;
	
	if ( !regkey )
		return WERR_BADFID; 

	rpcstr_pull(filename, q_u->filename.string->buffer, sizeof(filename), q_u->filename.string->uni_str_len*2, STR_TERMINATE);

	DEBUG(8,("_reg_restore_key: verifying restore of key [%s] from \"%s\"\n", regkey->name, filename));

	if ( (snum = validate_reg_filename( filename )) == -1 )
		return WERR_OBJECT_PATH_INVALID;
		
	/* user must posses SeRestorePrivilege for this this proceed */
	
	if ( !user_has_privileges( p->pipe_user.nt_user_token, &se_restore ) )
		return WERR_ACCESS_DENIED;
		
	DEBUG(2,("_reg_restore_key: Restoring [%s] from %s in share %s\n", regkey->name, filename, lp_servicename(snum) ));

	return restore_registry_key( regkey, filename );
}

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

static WERROR reg_write_tree( REGF_FILE *regfile, const char *keypath,
                              REGF_NK_REC *parent, SEC_DESC *sec_desc )
{
	REGF_NK_REC *key;
	REGVAL_CTR *values;
	REGSUBKEY_CTR *subkeys;
	int i, num_subkeys;
	pstring key_tmp;
	char *keyname, *parentpath;
	pstring subkeypath;
	char *subkeyname;
	REGISTRY_KEY registry_key;
	WERROR result = WERR_OK;
	
	if ( !regfile )
		return WERR_GENERAL_FAILURE;
		
	if ( !keypath )
		return WERR_OBJECT_PATH_INVALID;
		
	/* split up the registry key path */
	
	pstrcpy( key_tmp, keypath );
	if ( !reg_split_key( key_tmp, &parentpath, &keyname ) )
		return WERR_OBJECT_PATH_INVALID;

	if ( !keyname )
		keyname = parentpath;

	/* we need a REGISTRY_KEY object here to enumerate subkeys and values */
	
	ZERO_STRUCT( registry_key );
	pstrcpy( registry_key.name, keypath );
	if ( !(registry_key.hook = reghook_cache_find( registry_key.name )) )
		return WERR_BADFILE;

	
	/* lookup the values and subkeys */
	
	if ( !(subkeys = TALLOC_ZERO_P( regfile->mem_ctx, REGSUBKEY_CTR )) )
		return WERR_NOMEM;

	if ( !(values = TALLOC_ZERO_P( subkeys, REGVAL_CTR )) )
		return WERR_NOMEM;

	fetch_reg_keys( &registry_key, subkeys );
	fetch_reg_values( &registry_key, values );

	/* write out this key */
		
	if ( !(key = regfio_write_key( regfile, keyname, values, subkeys, sec_desc, parent )) ) {
		result = WERR_CAN_NOT_COMPLETE;
		goto done;
	}

	/* write each one of the subkeys out */

	num_subkeys = regsubkey_ctr_numkeys( subkeys );
	for ( i=0; i<num_subkeys; i++ ) {
		subkeyname = regsubkey_ctr_specific_key( subkeys, i );
		pstr_sprintf( subkeypath, "%s\\%s", keypath, subkeyname );
		result = reg_write_tree( regfile, subkeypath, key, sec_desc );
		if ( !W_ERROR_IS_OK(result) )
			goto done;
	}

	DEBUG(6,("reg_write_tree: wrote key [%s]\n", keypath ));

done:
	TALLOC_FREE( subkeys );

	return result;
}

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

static WERROR make_default_reg_sd( TALLOC_CTX *ctx, SEC_DESC **psd )
{
	DOM_SID adm_sid, owner_sid;
	SEC_ACE ace[2];         /* at most 2 entries */
	SEC_ACCESS mask;
	SEC_ACL *psa = NULL;
	uint32 sd_size;

	/* set the owner to BUILTIN\Administrator */

	sid_copy(&owner_sid, &global_sid_Builtin);
	sid_append_rid(&owner_sid, DOMAIN_USER_RID_ADMIN );
	

	/* basic access for Everyone */

	init_sec_access(&mask, reg_generic_map.generic_execute | reg_generic_map.generic_read );
	init_sec_ace(&ace[0], &global_sid_World, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);

	/* add Full Access 'BUILTIN\Administrators' */

	init_sec_access(&mask, reg_generic_map.generic_all);
	sid_copy(&adm_sid, &global_sid_Builtin);
	sid_append_rid(&adm_sid, BUILTIN_ALIAS_RID_ADMINS);
	init_sec_ace(&ace[1], &adm_sid, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);

        /* create the security descriptor */

        if ((psa = make_sec_acl(ctx, NT4_ACL_REVISION, 2, ace)) == NULL)
                return WERR_NOMEM;

        if ((*psd = make_sec_desc(ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE, &owner_sid, NULL, NULL, psa, &sd_size)) == NULL)
                return WERR_NOMEM;

	return WERR_OK;
}

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

static WERROR backup_registry_key ( REGISTRY_KEY *krecord, const char *fname )
{
	REGF_FILE *regfile;
	WERROR result;
	SEC_DESC *sd = NULL;
	
	/* open the registry file....fail if the file already exists */
	
	if ( !(regfile = regfio_open( fname, (O_RDWR|O_CREAT|O_EXCL), (S_IREAD|S_IWRITE) )) ) {
                DEBUG(0,("backup_registry_key: failed to open \"%s\" (%s)\n", 
			fname, strerror(errno) ));
		return ( ntstatus_to_werror(map_nt_error_from_unix( errno )) );
        }
	
	if ( !W_ERROR_IS_OK(result = make_default_reg_sd( regfile->mem_ctx, &sd )) ) {
		regfio_close( regfile );
		return result;
	}
		
	/* write the registry tree to the file  */
	
	result = reg_write_tree( regfile, krecord->name, NULL, sd );
		
	/* cleanup */
	
	regfio_close( regfile );
	
	return result;
}

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

WERROR _reg_save_key(pipes_struct *p, REG_Q_SAVE_KEY  *q_u, REG_R_SAVE_KEY *r_u)
{
	REGISTRY_KEY	*regkey = find_regkey_index_by_hnd( p, &q_u->pol );
	pstring         filename;
	int             snum;
	
	if ( !regkey )
		return WERR_BADFID; 

	rpcstr_pull(filename, q_u->filename.string->buffer, sizeof(filename), q_u->filename.string->uni_str_len*2, STR_TERMINATE);

	DEBUG(8,("_reg_save_key: verifying backup of key [%s] to \"%s\"\n", regkey->name, filename));
	
	if ( (snum = validate_reg_filename( filename )) == -1 )
		return WERR_OBJECT_PATH_INVALID;
		
	DEBUG(2,("_reg_save_key: Saving [%s] to %s in share %s\n", regkey->name, filename, lp_servicename(snum) ));
		
	return backup_registry_key( regkey, filename );
}

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

WERROR _reg_create_key_ex(pipes_struct *p, REG_Q_CREATE_KEY_EX *q_u, REG_R_CREATE_KEY_EX *r_u)
{
	REGISTRY_KEY *parent = find_regkey_index_by_hnd(p, &q_u->handle);
	REGISTRY_KEY *newparent;
	POLICY_HND newparent_handle;
	REGSUBKEY_CTR *subkeys;
	BOOL write_result;
	pstring name;
	WERROR result;

	if ( !parent )
		return WERR_BADFID;
		
	rpcstr_pull( name, q_u->name.string->buffer, sizeof(name), q_u->name.string->uni_str_len*2, 0 );
	
	/* ok.  Here's what we do.  */

	if ( strrchr( name, '\\' ) ) {
		pstring newkeyname;
		char *ptr;
		uint32 access_granted;
		
		/* (1) check for enumerate rights on the parent handle.  CLients can try 
		       create things like 'SOFTWARE\Samba' on the HKLM handle. 
		   (2) open the path to the child parent key if necessary */
	
		if ( !(parent->access_granted & SEC_RIGHTS_ENUM_SUBKEYS) )
			return WERR_ACCESS_DENIED;
		
		pstrcpy( newkeyname, name );
		ptr = strrchr( newkeyname, '\\' );
		*ptr = '\0';

		result = open_registry_key( p, &newparent_handle, parent, newkeyname, 0 );
		if ( !W_ERROR_IS_OK(result) )
			return result;
		
		newparent = find_regkey_index_by_hnd(p, &newparent_handle);
		SMB_ASSERT( newparent != NULL );
			
		if ( !regkey_access_check( newparent, REG_KEY_READ|REG_KEY_WRITE, &access_granted, p->pipe_user.nt_user_token ) ) {
			result = WERR_ACCESS_DENIED;
			goto done;
		}

		newparent->access_granted = access_granted;

		/* copy the new key name (just the lower most keyname) */

		pstrcpy( name, ptr+1 );
	}
	else {
		/* use the existing open key information */
		newparent = parent;
		memcpy( &newparent_handle, &q_u->handle, sizeof(POLICY_HND) );
	}
	
	/* (3) check for create subkey rights on the correct parent */
	
	if ( !(newparent->access_granted & SEC_RIGHTS_CREATE_SUBKEY) ) {
		result = WERR_ACCESS_DENIED;
		goto done;
	}	
		
	if ( !(subkeys = TALLOC_ZERO_P( p->mem_ctx, REGSUBKEY_CTR )) ) {
		result = WERR_NOMEM;
		goto done;
	}

	/* (4) lookup the current keys and add the new one */
	
	fetch_reg_keys( newparent, subkeys );
	regsubkey_ctr_addkey( subkeys, name );
	
	/* now write to the registry backend */
	
	write_result = store_reg_keys( newparent, subkeys );
	
	TALLOC_FREE( subkeys );

	if ( !write_result )
		return WERR_REG_IO_FAILURE;
		
	/* (5) open the new key and return the handle.  Note that it is probably 
	   not correct to grant full access on this open handle.  We should pass
	   the new open through the regkey_access_check() like we do for 
	   _reg_open_entry() but this is ok for now. */
	
	result = open_registry_key( p, &r_u->handle, newparent, name, REG_KEY_ALL );

done:
	/* close any intermediate key handles */
	
	if ( newparent != parent )
		close_registry_key( p, &newparent_handle );
		
	return result;
}


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

WERROR _reg_set_value(pipes_struct *p, REG_Q_SET_VALUE  *q_u, REG_R_SET_VALUE *r_u)
{
	REGISTRY_KEY *key = find_regkey_index_by_hnd(p, &q_u->handle);
	REGVAL_CTR *values;
	BOOL write_result;
	fstring valuename;

	if ( !key )
		return WERR_BADFID;
		
	/* access checks first */
	
	if ( !(key->access_granted & SEC_RIGHTS_SET_VALUE) )
		return WERR_ACCESS_DENIED;
		
	rpcstr_pull( valuename, q_u->name.string->buffer, sizeof(valuename), q_u->name.string->uni_str_len*2, 0 );

	/* verify the name */

	if ( !*valuename )
		return WERR_INVALID_PARAM;

	DEBUG(8,("_reg_set_value: Setting value for [%s:%s]\n", key->name, valuename));
		
	if ( !(values = TALLOC_ZERO_P( p->mem_ctx, REGVAL_CTR )) )
		return WERR_NOMEM; 
	
	/* lookup the current values and add the new one */
	
	fetch_reg_values( key, values );
	
	regval_ctr_addvalue( values, valuename, q_u->type, (char*)q_u->value.buffer, q_u->value.buf_len );
	
	/* now write to the registry backend */
	
	write_result = store_reg_values( key, values );
	
	TALLOC_FREE( values );
	
	if ( !write_result )
		return WERR_REG_IO_FAILURE;
		
	return WERR_OK;
}

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

WERROR _reg_delete_key(pipes_struct *p, REG_Q_DELETE_KEY  *q_u, REG_R_DELETE_KEY *r_u)
{
	REGISTRY_KEY *parent = find_regkey_index_by_hnd(p, &q_u->handle);
	REGISTRY_KEY *newparent;
	POLICY_HND newparent_handle;
	REGSUBKEY_CTR *subkeys;
	BOOL write_result;
	pstring name;
	WERROR result;

	if ( !parent )
		return WERR_BADFID;
		
	rpcstr_pull( name, q_u->name.string->buffer, sizeof(name), q_u->name.string->uni_str_len*2, 0 );
		
	/* ok.  Here's what we do.  */

	if ( strrchr( name, '\\' ) ) {
		pstring newkeyname;
		char *ptr;
		uint32 access_granted;
		
		/* (1) check for enumerate rights on the parent handle.  CLients can try 
		       create things like 'SOFTWARE\Samba' on the HKLM handle. 
		   (2) open the path to the child parent key if necessary */
	
		if ( !(parent->access_granted & SEC_RIGHTS_ENUM_SUBKEYS) )
			return WERR_ACCESS_DENIED;
		
		pstrcpy( newkeyname, name );
		ptr = strrchr( newkeyname, '\\' );
		*ptr = '\0';

		result = open_registry_key( p, &newparent_handle, parent, newkeyname, 0 );
		if ( !W_ERROR_IS_OK(result) )
			return result;
		
		newparent = find_regkey_index_by_hnd(p, &newparent_handle);
		SMB_ASSERT( newparent != NULL );
			
		if ( !regkey_access_check( newparent, REG_KEY_READ|REG_KEY_WRITE, &access_granted, p->pipe_user.nt_user_token ) ) {
			result = WERR_ACCESS_DENIED;
			goto done;
		}

		newparent->access_granted = access_granted;

		/* copy the new key name (just the lower most keyname) */

		pstrcpy( name, ptr+1 );
	}
	else {
		/* use the existing open key information */
		newparent = parent;
		memcpy( &newparent_handle, &q_u->handle, sizeof(POLICY_HND) );
	}
	
	/* (3) check for create subkey rights on the correct parent */
	
	if ( !(newparent->access_granted & STD_RIGHT_DELETE_ACCESS) ) {
		result = WERR_ACCESS_DENIED;
		goto done;
	}

	if ( !(subkeys = TALLOC_ZERO_P( p->mem_ctx, REGSUBKEY_CTR )) ) {
		result = WERR_NOMEM;
		goto done;
	}
	
	/* lookup the current keys and delete the new one */
	
	fetch_reg_keys( newparent, subkeys );
	
	regsubkey_ctr_delkey( subkeys, name );
	
	/* now write to the registry backend */
	
	write_result = store_reg_keys( newparent, subkeys );
	
	TALLOC_FREE( subkeys );

	result = write_result ? WERR_OK : WERR_REG_IO_FAILURE;
	
done:
	/* close any intermediate key handles */
	
	if ( newparent != parent )
		close_registry_key( p, &newparent_handle );

	return result;
}


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

WERROR _reg_delete_value(pipes_struct *p, REG_Q_DELETE_VALUE  *q_u, REG_R_DELETE_VALUE *r_u)
{
	REGISTRY_KEY *key = find_regkey_index_by_hnd(p, &q_u->handle);
	REGVAL_CTR *values;
	BOOL write_result;
	fstring valuename;
	
	if ( !key )
		return WERR_BADFID;
		
	/* access checks first */
	
	if ( !(key->access_granted & SEC_RIGHTS_SET_VALUE) )
		return WERR_ACCESS_DENIED;

	rpcstr_pull( valuename, q_u->name.string->buffer, sizeof(valuename), q_u->name.string->uni_str_len*2, 0 );

	if ( !*valuename )
		return WERR_INVALID_PARAM;

	DEBUG(8,("_reg_delete_value: Setting value for [%s:%s]\n", key->name, valuename));

	if ( !(values = TALLOC_ZERO_P( p->mem_ctx, REGVAL_CTR )) )
		return WERR_NOMEM;
	
	/* lookup the current values and add the new one */
	
	fetch_reg_values( key, values );
	
	regval_ctr_delvalue( values, valuename );
	
	/* now write to the registry backend */
	
	write_result = store_reg_values( key, values );
	
	TALLOC_FREE( values );
	
	if ( !write_result )
		return WERR_REG_IO_FAILURE;
		
	return WERR_OK;
}

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

WERROR _reg_get_key_sec(pipes_struct *p, REG_Q_GET_KEY_SEC  *q_u, REG_R_GET_KEY_SEC *r_u)
{
	REGISTRY_KEY *key = find_regkey_index_by_hnd(p, &q_u->handle);

	if ( !key )
		return WERR_BADFID;
		
	/* access checks first */
	
	if ( !(key->access_granted & STD_RIGHT_READ_CONTROL_ACCESS) )
		return WERR_ACCESS_DENIED;
		
	return WERR_ACCESS_DENIED;
}

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

WERROR _reg_set_key_sec(pipes_struct *p, REG_Q_SET_KEY_SEC  *q_u, REG_R_SET_KEY_SEC *r_u)
{
	REGISTRY_KEY *key = find_regkey_index_by_hnd(p, &q_u->handle);

	if ( !key )
		return WERR_BADFID;
		
	/* access checks first */
	
	if ( !(key->access_granted & STD_RIGHT_WRITE_DAC_ACCESS) )
		return WERR_ACCESS_DENIED;
		
	return WERR_ACCESS_DENIED;
}