summaryrefslogtreecommitdiff
path: root/source3/nsswitch/winbindd_group.c
blob: 7edb755f1c01c9b9fd2fea0afc3f7a73cdbecc88 (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
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
/* 
   Unix SMB/CIFS implementation.

   Winbind daemon for ntdom nss module

   Copyright (C) Tim Potter 2000
   Copyright (C) Jeremy Allison 2001.
   Copyright (C) Gerald (Jerry) Carter 2003.
   Copyright (C) Volker Lendecke 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"
#include "winbindd.h"

extern BOOL opt_nocache;

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND

static void add_member(const char *domain, const char *user,
	   char **pp_members, size_t *p_num_members)
{
	fstring name;

	fill_domain_username(name, domain, user, True);
	safe_strcat(name, ",", sizeof(name)-1);
	string_append(pp_members, name);
	*p_num_members += 1;
}

/**********************************************************************
 Add member users resulting from sid. Expand if it is a domain group.
**********************************************************************/

static void add_expanded_sid(const DOM_SID *sid, char **pp_members, size_t *p_num_members)
{
	DOM_SID dom_sid;
	uint32 rid;
	struct winbindd_domain *domain;
	size_t i;

	char *domain_name = NULL;
	char *name = NULL;
	enum lsa_SidType type;

	uint32 num_names;
	DOM_SID *sid_mem;
	char **names;
	uint32 *types;

	NTSTATUS result;

	TALLOC_CTX *mem_ctx = talloc_init("add_expanded_sid");

	if (mem_ctx == NULL) {
		DEBUG(1, ("talloc_init failed\n"));
		return;
	}

	sid_copy(&dom_sid, sid);
	sid_split_rid(&dom_sid, &rid);

	domain = find_lookup_domain_from_sid(sid);

	if (domain == NULL) {
		DEBUG(3, ("Could not find domain for sid %s\n",
			  sid_string_static(sid)));
		goto done;
	}

	result = domain->methods->sid_to_name(domain, mem_ctx, sid,
					      &domain_name, &name, &type);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(3, ("sid_to_name failed for sid %s\n",
			  sid_string_static(sid)));
		goto done;
	}

	DEBUG(10, ("Found name %s, type %d\n", name, type));

	if (type == SID_NAME_USER) {
		add_member(domain_name, name, pp_members, p_num_members);
		goto done;
	}

	if (type != SID_NAME_DOM_GRP) {
		DEBUG(10, ("Alias member %s neither user nor group, ignore\n",
			   name));
		goto done;
	}

	/* Expand the domain group, this must be done via the target domain */

	domain = find_domain_from_sid(sid);

	if (domain == NULL) {
		DEBUG(3, ("Could not find domain from SID %s\n",
			  sid_string_static(sid)));
		goto done;
	}

	result = domain->methods->lookup_groupmem(domain, mem_ctx,
						  sid, &num_names,
						  &sid_mem, &names,
						  &types);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(10, ("Could not lookup group members for %s: %s\n",
			   name, nt_errstr(result)));
		goto done;
	}

	for (i=0; i<num_names; i++) {
		DEBUG(10, ("Adding group member SID %s\n",
			   sid_string_static(&sid_mem[i])));

		if (types[i] != SID_NAME_USER) {
			DEBUG(1, ("Hmmm. Member %s of group %s is no user. "
				  "Ignoring.\n", names[i], name));
			continue;
		}

		add_member(domain->name, names[i], pp_members, p_num_members);
	}

 done:
	talloc_destroy(mem_ctx);
	return;
}

static BOOL fill_passdb_alias_grmem(struct winbindd_domain *domain,
			     DOM_SID *group_sid, 
			     size_t *num_gr_mem, char **gr_mem, size_t *gr_mem_len)
{
	DOM_SID *members;
	size_t i, num_members;

	*num_gr_mem = 0;
	*gr_mem = NULL;
	*gr_mem_len = 0;

	if (!NT_STATUS_IS_OK(pdb_enum_aliasmem(group_sid, &members,
					       &num_members)))
		return True;

	for (i=0; i<num_members; i++) {
		add_expanded_sid(&members[i], gr_mem, num_gr_mem);
	}

	TALLOC_FREE(members);

	if (*gr_mem != NULL) {
		size_t len;

		/* We have at least one member, strip off the last "," */
		len = strlen(*gr_mem);
		(*gr_mem)[len-1] = '\0';
		*gr_mem_len = len;
	}

	return True;
}

/* Fill a grent structure from various other information */

static BOOL fill_grent(struct winbindd_gr *gr, const char *dom_name, 
		       const char *gr_name, gid_t unix_gid)
{
	fstring full_group_name;

	fill_domain_username( full_group_name, dom_name, gr_name, True );

	gr->gr_gid = unix_gid;
    
	/* Group name and password */
    
	safe_strcpy(gr->gr_name, full_group_name, sizeof(gr->gr_name) - 1);
	safe_strcpy(gr->gr_passwd, "x", sizeof(gr->gr_passwd) - 1);

	return True;
}

/* Fill in the group membership field of a NT group given by group_sid */

static BOOL fill_grent_mem(struct winbindd_domain *domain,
			   struct winbindd_cli_state *state,
			   DOM_SID *group_sid, 
			   enum lsa_SidType group_name_type, 
			   size_t *num_gr_mem, char **gr_mem, size_t *gr_mem_len)
{
	DOM_SID *sid_mem = NULL;
	uint32 num_names = 0;
	uint32 *name_types = NULL;
	unsigned int buf_len = 0, buf_ndx = 0, i;
	char **names = NULL, *buf = NULL;
	BOOL result = False;
	TALLOC_CTX *mem_ctx;
	NTSTATUS status;
	uint32 group_rid;
	fstring sid_string;

	if (!(mem_ctx = talloc_init("fill_grent_mem(%s)", domain->name)))
		return False;

	/* Initialise group membership information */
	
	DEBUG(10, ("group SID %s\n", sid_to_string(sid_string, group_sid)));

	/* Initialize with no members */
	*num_gr_mem = 0;

	/* HACK ALERT!! This whole routine does not cope with group members
	 * from more than one domain, ie aliases. Thus we have to work it out
	 * ourselves in a special routine. */

	if (domain->internal)
		return fill_passdb_alias_grmem(domain, group_sid,
					       num_gr_mem,
					       gr_mem, gr_mem_len);
	
	if ( !((group_name_type==SID_NAME_DOM_GRP) ||
		((group_name_type==SID_NAME_ALIAS) && domain->primary)) )
	{
		DEBUG(1, ("SID %s in domain %s isn't a domain group (%d)\n", 
			  sid_to_string(sid_string, group_sid), domain->name, 
			  group_name_type));
                goto done;
	}

	/* OPTIMIZATION / HACK. */
	/* If "enum users" is set to false, and the group being looked
	   up is the Domain Users SID: S-1-5-domain-513, then for the
	   list of members check if the querying user is in that group,
	   and if so only return that user as the gr_mem array.
	   We can change this to a different parameter than "enum users"
	   if neccessaey, or parameterize the group list we do this for. */

	sid_peek_rid( group_sid, &group_rid );
	if (!lp_winbind_enum_users() && group_rid == DOMAIN_GROUP_RID_USERS) {
		DOM_SID querying_user_sid;
		DOM_SID *pquerying_user_sid = NULL;
		uint32 num_groups = 0;
		DOM_SID *user_sids = NULL;
		BOOL u_in_group = False;

		DEBUG(10,("fill_grent_mem: optimized lookup for sid %s domain %s\n",
			sid_to_string(sid_string, group_sid), domain->name ));

		if (state) {
			uid_t ret_uid = (uid_t)-1;
			if (sys_getpeereid(state->sock, &ret_uid)==0) {
				/* We know who's asking - look up their SID if
				   it's one we've mapped before. */
				status = idmap_uid_to_sid(&querying_user_sid, ret_uid);
				if (NT_STATUS_IS_OK(status)) {
					pquerying_user_sid = &querying_user_sid;
					DEBUG(10,("fill_grent_mem: querying uid %u -> %s\n",
						(unsigned int)ret_uid,
						sid_to_string(sid_string, pquerying_user_sid) ));
				}
			}
		}

		/* Only look up if it was a winbindd user in this domain. */
		if (pquerying_user_sid &&
				(sid_compare_domain(pquerying_user_sid, &domain->sid) == 0)) {

			DEBUG(10,("fill_grent_mem: querying user = %s\n",
				sid_to_string(sid_string, pquerying_user_sid) ));

			status = domain->methods->lookup_usergroups(domain,
							mem_ctx,
							pquerying_user_sid,
							&num_groups,
							&user_sids);
			if (!NT_STATUS_IS_OK(status)) {
				DEBUG(1, ("fill_grent_mem: lookup_usergroups failed "
					"for sid %s in domain %s (error: %s)\n", 
					sid_to_string(sid_string, pquerying_user_sid),
					domain->name,
					nt_errstr(status)));
				goto done;
			}

			for (i = 0; i < num_groups; i++) {
				if (sid_equal(group_sid, &user_sids[i])) {
					/* User is in Domain Users, add their name
					   as the only group member. */
					u_in_group = True;
					break;
				}
			}
		}

		if (u_in_group) {
			size_t len = 0;
			char *domainname = NULL;
			char *username = NULL;
			fstring name;
			enum lsa_SidType type;

			DEBUG(10,("fill_grent_mem: sid %s in 'Domain Users' in domain %s\n",
				sid_to_string(sid_string, pquerying_user_sid), domain->name ));

			status = domain->methods->sid_to_name(domain, mem_ctx,
								pquerying_user_sid,
								&domainname,
								&username,
								&type);
			if (!NT_STATUS_IS_OK(status)) {
				DEBUG(1, ("could not lookup username for user "
					"sid %s in domain %s (error: %s)\n", 
					sid_to_string(sid_string, pquerying_user_sid),
					domain->name,
					nt_errstr(status)));
				goto done;
			}
			fill_domain_username(name, domain->name, username, True);
			len = strlen(name);
			buf_len = len + 1;
			if (!(buf = (char *)SMB_MALLOC(buf_len))) {
				DEBUG(1, ("out of memory\n"));
				goto done;
			}
			memcpy(buf, name, buf_len);

			DEBUG(10,("fill_grent_mem: user %s in 'Domain Users' in domain %s\n",
				name, domain->name ));

			/* user is the only member */
			*num_gr_mem = 1;
		}
		
		*gr_mem = buf;
		*gr_mem_len = buf_len;

		DEBUG(10, ("num_mem = %u, len = %u, mem = %s\n", (unsigned int)*num_gr_mem, 
		   (unsigned int)buf_len, *num_gr_mem ? buf : "NULL")); 
		result = True;
		goto done;
	}

	/* Lookup group members */
	status = domain->methods->lookup_groupmem(domain, mem_ctx, group_sid, &num_names, 
						  &sid_mem, &names, &name_types);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(1, ("could not lookup membership for group sid %s in domain %s (error: %s)\n", 
			  sid_to_string(sid_string, group_sid), domain->name, nt_errstr(status)));
		goto done;
	}

	DEBUG(10, ("looked up %d names\n", num_names));

	if (DEBUGLEVEL >= 10) {
		for (i = 0; i < num_names; i++)
			DEBUG(10, ("\t%20s %s %d\n", names[i],
				   sid_string_static(&sid_mem[i]),
				   name_types[i]));
	}

	/* Add members to list */

 again:

	for (i = 0; i < num_names; i++) {
		char *the_name;
		fstring name;
		int len;
			
		the_name = names[i];

		DEBUG(10, ("processing name %s\n", the_name));

		/* FIXME: need to cope with groups within groups.  These
                   occur in Universal groups on a Windows 2000 native mode
                   server. */

		/* make sure to allow machine accounts */

		if (name_types[i] != SID_NAME_USER && name_types[i] != SID_NAME_COMPUTER) {
			DEBUG(3, ("name %s isn't a domain user (%s)\n", the_name, sid_type_lookup(name_types[i])));
			continue;
		}

		/* Append domain name */

		fill_domain_username(name, domain->name, the_name, True);

		len = strlen(name);
		
		/* Add to list or calculate buffer length */

		if (!buf) {
			buf_len += len + 1; /* List is comma separated */
			(*num_gr_mem)++;
			DEBUG(10, ("buf_len + %d = %d\n", len + 1, buf_len));
		} else {
			DEBUG(10, ("appending %s at ndx %d\n", name, buf_ndx));
			safe_strcpy(&buf[buf_ndx], name, len);
			buf_ndx += len;
			buf[buf_ndx] = ',';
			buf_ndx++;
		}
	}

	/* Allocate buffer */

	if (!buf && buf_len != 0) {
		if (!(buf = (char *)SMB_MALLOC(buf_len))) {
			DEBUG(1, ("out of memory\n"));
			result = False;
			goto done;
		}
		memset(buf, 0, buf_len);
		goto again;
	}

	if (buf && buf_ndx > 0) {
		buf[buf_ndx - 1] = '\0';
	}

	*gr_mem = buf;
	*gr_mem_len = buf_len;

	DEBUG(10, ("num_mem = %u, len = %u, mem = %s\n", (unsigned int)*num_gr_mem, 
		   (unsigned int)buf_len, *num_gr_mem ? buf : "NULL")); 
	result = True;

done:

	talloc_destroy(mem_ctx);
	
	DEBUG(10, ("fill_grent_mem returning %d\n", result));

	return result;
}

/* Return a group structure from a group name */

void winbindd_getgrnam(struct winbindd_cli_state *state)
{
	DOM_SID group_sid, tmp_sid;
	uint32 grp_rid;
	struct winbindd_domain *domain;
	enum lsa_SidType name_type;
	fstring name_domain, name_group;
	char *tmp, *gr_mem;
	size_t gr_mem_len;
	size_t num_gr_mem;
	gid_t gid;
	union unid_t id;
	NTSTATUS status;
	
	/* Ensure null termination */
	state->request.data.groupname[sizeof(state->request.data.groupname)-1]='\0';

	DEBUG(3, ("[%5lu]: getgrnam %s\n", (unsigned long)state->pid,
		  state->request.data.groupname));

	/* Parse domain and groupname */
	
	memset(name_group, 0, sizeof(fstring));

	tmp = state->request.data.groupname;
	
	parse_domain_user(tmp, name_domain, name_group);

	/* if no domain or our local domain and no local tdb group, default to
	 * our local domain for aliases */

	if ( !*name_domain || strequal(name_domain, get_global_sam_name()) ) {
		fstrcpy(name_domain, get_global_sam_name());
	}

	/* Get info for the domain */

	if ((domain = find_domain_from_name(name_domain)) == NULL) {
		DEBUG(3, ("could not get domain sid for domain %s\n",
			  name_domain));
		request_error(state);
		return;
	}
	/* should we deal with users for our domain? */
	
	if ( lp_winbind_trusted_domains_only() && domain->primary) {
		DEBUG(7,("winbindd_getgrnam: My domain -- rejecting "
			 "getgrnam() for %s\\%s.\n", name_domain, name_group));
		request_error(state);
		return;
	}

	/* Get rid and name type from name */

	ws_name_replace( name_group, '_' );
        
	if (!winbindd_lookup_sid_by_name(state->mem_ctx, domain, domain->name,
					 name_group, &group_sid, &name_type)) {
		DEBUG(1, ("group %s in domain %s does not exist\n", 
			  name_group, name_domain));
		request_error(state);
		return;
	}

	if ( !((name_type==SID_NAME_DOM_GRP) ||
	       ((name_type==SID_NAME_ALIAS) && domain->primary) ||
	       ((name_type==SID_NAME_ALIAS) && domain->internal) ||
	       ((name_type==SID_NAME_WKN_GRP) && domain->internal)) )
	{
		DEBUG(1, ("name '%s' is not a local, domain or builtin "
			  "group: %d\n", name_group, name_type));
		request_error(state);
		return;
	}

	/* Make sure that the group SID is within the domain of the
	   original domain */

	sid_copy( &tmp_sid, &group_sid );
	sid_split_rid( &tmp_sid, &grp_rid );
	if ( !sid_equal( &tmp_sid, &domain->sid ) ) {
		DEBUG(3,("winbindd_getgrnam: group %s resolves to a SID in the wrong domain [%s]\n", 
			state->request.data.groupname, sid_string_static(&group_sid)));
		request_error(state);
		return;
	}

	

	/* Try to get the GID */

	status = idmap_sid_to_gid(&group_sid, &gid);

	if (NT_STATUS_IS_OK(status)) {
		goto got_gid;
	}

	/* Maybe it's one of our aliases in passdb */

	if (pdb_sid_to_id(&group_sid, &id, &name_type) &&
	    ((name_type == SID_NAME_ALIAS) ||
	     (name_type == SID_NAME_WKN_GRP))) {
		gid = id.gid;
		goto got_gid;
	}

	DEBUG(1, ("error converting unix gid to sid\n"));
	request_error(state);
	return;

 got_gid:

	if (!fill_grent(&state->response.data.gr, name_domain,
			name_group, gid) ||
	    !fill_grent_mem(domain, state, &group_sid, name_type,
			    &num_gr_mem,
			    &gr_mem, &gr_mem_len)) {
		request_error(state);
		return;
	}

	state->response.data.gr.num_gr_mem = (uint32)num_gr_mem;

	/* Group membership lives at start of extra data */

	state->response.data.gr.gr_mem_ofs = 0;

	state->response.length += gr_mem_len;
	state->response.extra_data.data = gr_mem;
	request_ok(state);
}

static void getgrgid_got_sid(struct winbindd_cli_state *state, DOM_SID group_sid)
{
	struct winbindd_domain *domain;
	enum lsa_SidType name_type;
	char *dom_name;
	char *group_name;
	size_t gr_mem_len;
	size_t num_gr_mem;
	char *gr_mem;

	/* Get name from sid */

	if (!winbindd_lookup_name_by_sid(state->mem_ctx, &group_sid, &dom_name,
					 &group_name, &name_type)) {
		DEBUG(1, ("could not lookup sid\n"));
		request_error(state);
		TALLOC_FREE(group_name);
		TALLOC_FREE(dom_name);
		return;
	}

	/* Fill in group structure */

	domain = find_domain_from_sid_noinit(&group_sid);

	if (!domain) {
		DEBUG(1,("Can't find domain from sid\n"));
		request_error(state);
		TALLOC_FREE(group_name);
		TALLOC_FREE(dom_name);
		return;
	}

	if ( !((name_type==SID_NAME_DOM_GRP) ||
	       ((name_type==SID_NAME_ALIAS) && domain->primary) ||
	       ((name_type==SID_NAME_ALIAS) && domain->internal)) )
	{
		DEBUG(1, ("name '%s' is not a local or domain group: %d\n", 
			  group_name, name_type));
		request_error(state);
		TALLOC_FREE(group_name);
		TALLOC_FREE(dom_name);
		return;
	}

	if (!fill_grent(&state->response.data.gr, dom_name, group_name, 
			state->request.data.gid) ||
	    !fill_grent_mem(domain, state, &group_sid, name_type,
			    &num_gr_mem,
			    &gr_mem, &gr_mem_len)) {
		request_error(state);
		TALLOC_FREE(group_name);
		TALLOC_FREE(dom_name);
		return;
	}

	state->response.data.gr.num_gr_mem = (uint32)num_gr_mem;

	/* Group membership lives at start of extra data */

	state->response.data.gr.gr_mem_ofs = 0;

	state->response.length += gr_mem_len;
	state->response.extra_data.data = gr_mem;

	TALLOC_FREE(group_name);
	TALLOC_FREE(dom_name);

	request_ok(state);
}

static void getgrgid_recv(void *private_data, BOOL success, const char *sid)
{
	struct winbindd_cli_state *state = talloc_get_type_abort(private_data, struct winbindd_cli_state);
	enum lsa_SidType name_type;
	DOM_SID group_sid;

	if (success) {
		DEBUG(10,("getgrgid_recv: gid %lu has sid %s\n",
			  (unsigned long)(state->request.data.gid), sid));

		string_to_sid(&group_sid, sid);
		getgrgid_got_sid(state, group_sid);
		return;
	}

	/* Ok, this might be "ours", i.e. an alias */
	if (pdb_gid_to_sid(state->request.data.gid, &group_sid) &&
	    lookup_sid(state->mem_ctx, &group_sid, NULL, NULL, &name_type) &&
	    (name_type == SID_NAME_ALIAS)) {
		/* Hey, got an alias */
		DEBUG(10,("getgrgid_recv: we have an alias with gid %lu and sid %s\n",
			  (unsigned long)(state->request.data.gid), sid));
		getgrgid_got_sid(state, group_sid);
		return;
	}

	DEBUG(1, ("could not convert gid %lu to sid\n", 
		  (unsigned long)state->request.data.gid));
	request_error(state);
}

/* Return a group structure from a gid number */
void winbindd_getgrgid(struct winbindd_cli_state *state)
{
	DEBUG(3, ("[%5lu]: getgrgid %lu\n", (unsigned long)state->pid, 
		  (unsigned long)state->request.data.gid));

	/* always use the async interface */
	winbindd_gid2sid_async(state->mem_ctx, state->request.data.gid, getgrgid_recv, state);
}

/*
 * set/get/endgrent functions
 */

/* "Rewind" file pointer for group database enumeration */

static BOOL winbindd_setgrent_internal(struct winbindd_cli_state *state)
{
	struct winbindd_domain *domain;

	DEBUG(3, ("[%5lu]: setgrent\n", (unsigned long)state->pid));

	/* Check user has enabled this */

	if (!lp_winbind_enum_groups()) {
		return False;
	}		

	/* Free old static data if it exists */
	
	if (state->getgrent_state != NULL) {
		free_getent_state(state->getgrent_state);
		state->getgrent_state = NULL;
	}
	
	/* Create sam pipes for each domain we know about */
	
	for (domain = domain_list(); domain != NULL; domain = domain->next) {
		struct getent_state *domain_state;
		
		/* Create a state record for this domain */

		/* don't add our domaina if we are a PDC or if we 
		   are a member of a Samba domain */
		
		if ( lp_winbind_trusted_domains_only() && domain->primary )
		{
			continue;
		}
						
		
		if ((domain_state = SMB_MALLOC_P(struct getent_state)) == NULL) {
			DEBUG(1, ("winbindd_setgrent: malloc failed for domain_state!\n"));
			return False;
		}
		
		ZERO_STRUCTP(domain_state);
		
		fstrcpy(domain_state->domain_name, domain->name);

		/* Add to list of open domains */
		
		DLIST_ADD(state->getgrent_state, domain_state);
	}
	
	state->getgrent_initialized = True;
	return True;
}

void winbindd_setgrent(struct winbindd_cli_state *state)
{
	if (winbindd_setgrent_internal(state)) {
		request_ok(state);
	} else {
		request_error(state);
	}
}

/* Close file pointer to ntdom group database */

void winbindd_endgrent(struct winbindd_cli_state *state)
{
	DEBUG(3, ("[%5lu]: endgrent\n", (unsigned long)state->pid));

	free_getent_state(state->getgrent_state);
	state->getgrent_initialized = False;
	state->getgrent_state = NULL;
	request_ok(state);
}

/* Get the list of domain groups and domain aliases for a domain.  We fill in
   the sam_entries and num_sam_entries fields with domain group information.  
   The dispinfo_ndx field is incremented to the index of the next group to 
   fetch. Return True if some groups were returned, False otherwise. */

static BOOL get_sam_group_entries(struct getent_state *ent)
{
	NTSTATUS status;
	uint32 num_entries;
	struct acct_info *name_list = NULL;
	TALLOC_CTX *mem_ctx;
	BOOL result = False;
	struct acct_info *sam_grp_entries = NULL;
	struct winbindd_domain *domain;
        
	if (ent->got_sam_entries)
		return False;

	if (!(mem_ctx = talloc_init("get_sam_group_entries(%s)",
					  ent->domain_name))) {
		DEBUG(1, ("get_sam_group_entries: could not create talloc context!\n")); 
		return False;
	}
		
	/* Free any existing group info */

	SAFE_FREE(ent->sam_entries);
	ent->num_sam_entries = 0;
	ent->got_sam_entries = True;

	/* Enumerate domain groups */

	num_entries = 0;

	if (!(domain = find_domain_from_name(ent->domain_name))) {
		DEBUG(3, ("no such domain %s in get_sam_group_entries\n", ent->domain_name));
		goto done;
	}

	/* always get the domain global groups */

	status = domain->methods->enum_dom_groups(domain, mem_ctx, &num_entries, &sam_grp_entries);
	
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(3, ("get_sam_group_entries: could not enumerate domain groups! Error: %s\n", nt_errstr(status)));
		result = False;
		goto done;
	}

	/* Copy entries into return buffer */

	if (num_entries) {
		if ( !(name_list = SMB_MALLOC_ARRAY(struct acct_info, num_entries)) ) {
			DEBUG(0,("get_sam_group_entries: Failed to malloc memory for %d domain groups!\n", 
				num_entries));
			result = False;
			goto done;
		}
		memcpy( name_list, sam_grp_entries, num_entries * sizeof(struct acct_info) );
	}
	
	ent->num_sam_entries = num_entries;
	
	/* get the domain local groups if we are a member of a native win2k domain
	   and are not using LDAP to get the groups */
	   
	if ( ( lp_security() != SEC_ADS && domain->native_mode 
		&& domain->primary) || domain->internal )
	{
		DEBUG(4,("get_sam_group_entries: %s domain; enumerating local groups as well\n", 
			domain->native_mode ? "Native Mode 2k":"BUILTIN or local"));
		
		status = domain->methods->enum_local_groups(domain, mem_ctx, &num_entries, &sam_grp_entries);
		
		if ( !NT_STATUS_IS_OK(status) ) { 
			DEBUG(3,("get_sam_group_entries: Failed to enumerate domain local groups!\n"));
			num_entries = 0;
		}
		else
			DEBUG(4,("get_sam_group_entries: Returned %d local groups\n", num_entries));
		
		/* Copy entries into return buffer */

		if ( num_entries ) {
			if ( !(name_list = SMB_REALLOC_ARRAY( name_list, struct acct_info, ent->num_sam_entries+num_entries)) )
			{
				DEBUG(0,("get_sam_group_entries: Failed to realloc more memory for %d local groups!\n", 
					num_entries));
				result = False;
				goto done;
			}
			
			memcpy( &name_list[ent->num_sam_entries], sam_grp_entries, 
				num_entries * sizeof(struct acct_info) );
		}
	
		ent->num_sam_entries += num_entries;
	}
	
		
	/* Fill in remaining fields */

	ent->sam_entries = name_list;
	ent->sam_entry_index = 0;

	result = (ent->num_sam_entries > 0);

 done:
	talloc_destroy(mem_ctx);

	return result;
}

/* Fetch next group entry from ntdom database */

#define MAX_GETGRENT_GROUPS 500

void winbindd_getgrent(struct winbindd_cli_state *state)
{
	struct getent_state *ent;
	struct winbindd_gr *group_list = NULL;
	int num_groups, group_list_ndx = 0, i, gr_mem_list_len = 0;
	char *gr_mem_list = NULL;

	DEBUG(3, ("[%5lu]: getgrent\n", (unsigned long)state->pid));

	/* Check user has enabled this */

	if (!lp_winbind_enum_groups()) {
		request_error(state);
		return;
	}

	num_groups = MIN(MAX_GETGRENT_GROUPS, state->request.data.num_entries);

	if ((state->response.extra_data.data = SMB_MALLOC_ARRAY(struct winbindd_gr, num_groups)) == NULL) {
		request_error(state);
		return;
	}

	memset(state->response.extra_data.data, '\0',
		num_groups * sizeof(struct winbindd_gr) );

	state->response.data.num_entries = 0;

	group_list = (struct winbindd_gr *)state->response.extra_data.data;

	if (!state->getgrent_initialized)
		winbindd_setgrent_internal(state);

	if (!(ent = state->getgrent_state)) {
		request_error(state);
		return;
	}

	/* Start sending back groups */

	for (i = 0; i < num_groups; i++) {
		struct acct_info *name_list = NULL;
		fstring domain_group_name;
		uint32 result;
		gid_t group_gid;
		size_t gr_mem_len;
		char *gr_mem;
		DOM_SID group_sid;
		struct winbindd_domain *domain;
				
		/* Do we need to fetch another chunk of groups? */

	tryagain:

		DEBUG(10, ("entry_index = %d, num_entries = %d\n",
			   ent->sam_entry_index, ent->num_sam_entries));

		if (ent->num_sam_entries == ent->sam_entry_index) {

			while(ent && !get_sam_group_entries(ent)) {
				struct getent_state *next_ent;

				DEBUG(10, ("freeing state info for domain %s\n", ent->domain_name)); 

				/* Free state information for this domain */

				SAFE_FREE(ent->sam_entries);

				next_ent = ent->next;
				DLIST_REMOVE(state->getgrent_state, ent);
				
				SAFE_FREE(ent);
				ent = next_ent;
			}

			/* No more domains */

			if (!ent) 
                                break;
		}
		
		name_list = (struct acct_info *)ent->sam_entries;
		
		if (!(domain = 
		      find_domain_from_name(ent->domain_name))) {
			DEBUG(3, ("No such domain %s in winbindd_getgrent\n", ent->domain_name));
			result = False;
			goto done;
		}

		/* Lookup group info */
		
		sid_copy(&group_sid, &domain->sid);
		sid_append_rid(&group_sid, name_list[ent->sam_entry_index].rid);

		if (!NT_STATUS_IS_OK(idmap_sid_to_gid(&group_sid, &group_gid))) {
			union unid_t id;
			enum lsa_SidType type;

			DEBUG(10, ("SID %s not in idmap\n",
				   sid_string_static(&group_sid)));

			if (!pdb_sid_to_id(&group_sid, &id, &type)) {
				DEBUG(1, ("could not look up gid for group "
					  "%s\n", 
					  name_list[ent->sam_entry_index].acct_name));
				ent->sam_entry_index++;
				goto tryagain;
			}

			if ((type != SID_NAME_DOM_GRP) &&
			    (type != SID_NAME_ALIAS) &&
			    (type != SID_NAME_WKN_GRP)) {
				DEBUG(1, ("Group %s is a %s, not a group\n",
					  sid_type_lookup(type),
					  name_list[ent->sam_entry_index].acct_name));
				ent->sam_entry_index++;
				goto tryagain;
			}
			group_gid = id.gid;
		}

		DEBUG(10, ("got gid %lu for group %lu\n", (unsigned long)group_gid,
			   (unsigned long)name_list[ent->sam_entry_index].rid));
		
		/* Fill in group entry */

		fill_domain_username(domain_group_name, ent->domain_name, 
			 name_list[ent->sam_entry_index].acct_name, True);

		result = fill_grent(&group_list[group_list_ndx], 
				    ent->domain_name,
				    name_list[ent->sam_entry_index].acct_name,
				    group_gid);

		/* Fill in group membership entry */

		if (result) {
			size_t num_gr_mem = 0;
			DOM_SID member_sid;
			group_list[group_list_ndx].num_gr_mem = 0;
			gr_mem = NULL;
			gr_mem_len = 0;
			
			/* Get group membership */			
			if (state->request.cmd == WINBINDD_GETGRLST) {
				result = True;
			} else {
				sid_copy(&member_sid, &domain->sid);
				sid_append_rid(&member_sid, name_list[ent->sam_entry_index].rid);
				result = fill_grent_mem(
					domain,
					NULL,
					&member_sid,
					SID_NAME_DOM_GRP,
					&num_gr_mem,
					&gr_mem, &gr_mem_len);

				group_list[group_list_ndx].num_gr_mem = (uint32)num_gr_mem;
			}
		}

		if (result) {
			/* Append to group membership list */
			gr_mem_list = (char *)SMB_REALLOC(
				gr_mem_list, gr_mem_list_len + gr_mem_len);

			if (!gr_mem_list && (group_list[group_list_ndx].num_gr_mem != 0)) {
				DEBUG(0, ("out of memory\n"));
				gr_mem_list_len = 0;
				break;
			}

			DEBUG(10, ("list_len = %d, mem_len = %u\n",
				   gr_mem_list_len, (unsigned int)gr_mem_len));

			memcpy(&gr_mem_list[gr_mem_list_len], gr_mem,
			       gr_mem_len);

			SAFE_FREE(gr_mem);

			group_list[group_list_ndx].gr_mem_ofs = 
				gr_mem_list_len;

			gr_mem_list_len += gr_mem_len;
		}

		ent->sam_entry_index++;
		
		/* Add group to return list */
		
		if (result) {

			DEBUG(10, ("adding group num_entries = %d\n",
				   state->response.data.num_entries));

			group_list_ndx++;
			state->response.data.num_entries++;
			
			state->response.length +=
				sizeof(struct winbindd_gr);
			
		} else {
			DEBUG(0, ("could not lookup domain group %s\n", 
				  domain_group_name));
		}
	}

	/* Copy the list of group memberships to the end of the extra data */

	if (group_list_ndx == 0)
		goto done;

	state->response.extra_data.data = SMB_REALLOC(
		state->response.extra_data.data,
		group_list_ndx * sizeof(struct winbindd_gr) + gr_mem_list_len);

	if (!state->response.extra_data.data) {
		DEBUG(0, ("out of memory\n"));
		group_list_ndx = 0;
		SAFE_FREE(gr_mem_list);
		request_error(state);
		return;
	}

	memcpy(&((char *)state->response.extra_data.data)
	       [group_list_ndx * sizeof(struct winbindd_gr)], 
	       gr_mem_list, gr_mem_list_len);

	state->response.length += gr_mem_list_len;

	DEBUG(10, ("returning %d groups, length = %d\n",
		   group_list_ndx, gr_mem_list_len));

	/* Out of domains */

 done:

       	SAFE_FREE(gr_mem_list);

	if (group_list_ndx > 0)
		request_ok(state);
	else
		request_error(state);
}

/* List domain groups without mapping to unix ids */

void winbindd_list_groups(struct winbindd_cli_state *state)
{
	uint32 total_entries = 0;
	struct winbindd_domain *domain;
	const char *which_domain;
	char *extra_data = NULL;
	unsigned int extra_data_len = 0, i;

	DEBUG(3, ("[%5lu]: list groups\n", (unsigned long)state->pid));

	/* Ensure null termination */
	state->request.domain_name[sizeof(state->request.domain_name)-1]='\0';	
	which_domain = state->request.domain_name;
	
	/* Enumerate over trusted domains */

	for (domain = domain_list(); domain; domain = domain->next) {
		struct getent_state groups;

		/* if we have a domain name restricting the request and this
		   one in the list doesn't match, then just bypass the remainder
		   of the loop */
		   
		if ( *which_domain && !strequal(which_domain, domain->name) )
			continue;
			
		ZERO_STRUCT(groups);

		/* Get list of sam groups */
		
		fstrcpy(groups.domain_name, domain->name);

		get_sam_group_entries(&groups);
			
		if (groups.num_sam_entries == 0) {
			/* this domain is empty or in an error state */
			continue;
		}

		/* keep track the of the total number of groups seen so 
		   far over all domains */
		total_entries += groups.num_sam_entries;
		
		/* Allocate some memory for extra data.  Note that we limit
		   account names to sizeof(fstring) = 128 characters.  */		
		extra_data = (char *)SMB_REALLOC(
			extra_data, sizeof(fstring) * total_entries);
 
		if (!extra_data) {
			DEBUG(0,("failed to enlarge buffer!\n"));
			request_error(state);
			return;
		}

		/* Pack group list into extra data fields */
		for (i = 0; i < groups.num_sam_entries; i++) {
			char *group_name = ((struct acct_info *)
					    groups.sam_entries)[i].acct_name; 
			fstring name;

			fill_domain_username(name, domain->name, group_name, True);
			/* Append to extra data */			
			memcpy(&extra_data[extra_data_len], name, 
                               strlen(name));
			extra_data_len += strlen(name);
			extra_data[extra_data_len++] = ',';
		}

		SAFE_FREE(groups.sam_entries);
	}

	/* Assign extra_data fields in response structure */
	if (extra_data) {
		extra_data[extra_data_len - 1] = '\0';
		state->response.extra_data.data = extra_data;
		state->response.length += extra_data_len;
	}

	/* No domains may have responded but that's still OK so don't
	   return an error. */

	request_ok(state);
}

/* Get user supplementary groups.  This is much quicker than trying to
   invert the groups database.  We merge the groups from the gids and
   other_sids info3 fields as trusted domain, universal group
   memberships, and nested groups (win2k native mode only) are not
   returned by the getgroups RPC call but are present in the info3. */

struct getgroups_state {
	struct winbindd_cli_state *state;
	struct winbindd_domain *domain;
	char *domname;
	char *username;
	DOM_SID user_sid;

	const DOM_SID *token_sids;
	size_t i, num_token_sids;

	gid_t *token_gids;
	size_t num_token_gids;
};

static void getgroups_usersid_recv(void *private_data, BOOL success,
				   const DOM_SID *sid, enum lsa_SidType type);
static void getgroups_tokensids_recv(void *private_data, BOOL success,
				     DOM_SID *token_sids, size_t num_token_sids);
static void getgroups_sid2gid_recv(void *private_data, BOOL success, gid_t gid);

void winbindd_getgroups(struct winbindd_cli_state *state)
{
	struct getgroups_state *s;

	/* Ensure null termination */
	state->request.data.username
		[sizeof(state->request.data.username)-1]='\0';

	DEBUG(3, ("[%5lu]: getgroups %s\n", (unsigned long)state->pid,
		  state->request.data.username));

	/* Parse domain and username */

	s = TALLOC_P(state->mem_ctx, struct getgroups_state);
	if (s == NULL) {
		DEBUG(0, ("talloc failed\n"));
		request_error(state);
		return;
	}

	s->state = state;

	if (!parse_domain_user_talloc(state->mem_ctx,
				      state->request.data.username,
				      &s->domname, &s->username)) {
		DEBUG(5, ("Could not parse domain user: %s\n",
			  state->request.data.username));

		/* error out if we do not have nested group support */

		if ( !lp_winbind_nested_groups() ) {
			request_error(state);
			return;
		}

		s->domname = talloc_strdup( state->mem_ctx, get_global_sam_name() );
		s->username = talloc_strdup( state->mem_ctx, state->request.data.username );
	}
	
	/* Get info for the domain */

	s->domain = find_domain_from_name_noinit(s->domname);

	if (s->domain == NULL) {
		DEBUG(7, ("could not find domain entry for domain %s\n", 
			  s->domname));
		request_error(state);
		return;
	}

	if ( s->domain->primary && lp_winbind_trusted_domains_only()) {
		DEBUG(7,("winbindd_getgroups: My domain -- rejecting "
			 "getgroups() for %s\\%s.\n", s->domname,
			 s->username));
		request_error(state);
		return;
	}	

	/* Get rid and name type from name.  The following costs 1 packet */

	winbindd_lookupname_async(state->mem_ctx, s->domname, s->username,
				  getgroups_usersid_recv, s);
}

static void getgroups_usersid_recv(void *private_data, BOOL success,
				   const DOM_SID *sid, enum lsa_SidType type)
{
	struct getgroups_state *s =
		(struct getgroups_state *)private_data;

	if ((!success) ||
	    ((type != SID_NAME_USER) && (type != SID_NAME_COMPUTER))) {
		request_error(s->state);
		return;
	}

	sid_copy(&s->user_sid, sid);

	winbindd_gettoken_async(s->state->mem_ctx, &s->user_sid,
				getgroups_tokensids_recv, s);
}

static void getgroups_tokensids_recv(void *private_data, BOOL success,
				     DOM_SID *token_sids, size_t num_token_sids)
{
	struct getgroups_state *s =
		(struct getgroups_state *)private_data;

	/* We need at least the user sid and the primary group in the token,
	 * otherwise it's an error */

	if ((!success) || (num_token_sids < 2)) {
		request_error(s->state);
		return;
	}

	s->token_sids = token_sids;
	s->num_token_sids = num_token_sids;
	s->i = 0;

	s->token_gids = NULL;
	s->num_token_gids = 0;

	getgroups_sid2gid_recv(s, False, 0);
}

static void getgroups_sid2gid_recv(void *private_data, BOOL success, gid_t gid)
{
	struct getgroups_state *s =
		(struct getgroups_state *)private_data;

	if (success) {
		if (!add_gid_to_array_unique(s->state->mem_ctx, gid,
					&s->token_gids,
					&s->num_token_gids)) {
			return;
		}
	}

	if (s->i < s->num_token_sids) {
		const DOM_SID *sid = &s->token_sids[s->i];
		s->i += 1;

		if (sid_equal(sid, &s->user_sid)) {
			getgroups_sid2gid_recv(s, False, 0);
			return;
		}

		winbindd_sid2gid_async(s->state->mem_ctx, sid,
				       getgroups_sid2gid_recv, s);
		return;
	}

	s->state->response.data.num_entries = s->num_token_gids;
	/* s->token_gids are talloced */
	s->state->response.extra_data.data = smb_xmemdup(s->token_gids, s->num_token_gids * sizeof(gid_t));
	s->state->response.length += s->num_token_gids * sizeof(gid_t);
	request_ok(s->state);
}

/* Get user supplementary sids. This is equivalent to the
   winbindd_getgroups() function but it involves a SID->SIDs mapping
   rather than a NAME->SID->SIDS->GIDS mapping, which means we avoid
   idmap. This call is designed to be used with applications that need
   to do ACL evaluation themselves. Note that the cached info3 data is
   not used 

   this function assumes that the SID that comes in is a user SID. If
   you pass in another type of SID then you may get unpredictable
   results.
*/

static void getusersids_recv(void *private_data, BOOL success, DOM_SID *sids,
			     size_t num_sids);

void winbindd_getusersids(struct winbindd_cli_state *state)
{
	DOM_SID *user_sid;

	/* Ensure null termination */
	state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';

	user_sid = TALLOC_P(state->mem_ctx, DOM_SID);
	if (user_sid == NULL) {
		DEBUG(1, ("talloc failed\n"));
		request_error(state);
		return;
	}

	if (!string_to_sid(user_sid, state->request.data.sid)) {
		DEBUG(1, ("Could not get convert sid %s from string\n",
			  state->request.data.sid));
		request_error(state);
		return;
	}

	winbindd_gettoken_async(state->mem_ctx, user_sid, getusersids_recv,
				state);
}

static void getusersids_recv(void *private_data, BOOL success, DOM_SID *sids,
			     size_t num_sids)
{
	struct winbindd_cli_state *state =
		(struct winbindd_cli_state *)private_data;
	char *ret = NULL;
	unsigned ofs, ret_size = 0;
	size_t i;

	if (!success) {
		request_error(state);
		return;
	}

	/* work out the response size */
	for (i = 0; i < num_sids; i++) {
		const char *s = sid_string_static(&sids[i]);
		ret_size += strlen(s) + 1;
	}

	/* build the reply */
	ret = (char *)SMB_MALLOC(ret_size);
	if (!ret) {
		DEBUG(0, ("malloc failed\n"));
		request_error(state);
		return;
	}
	ofs = 0;
	for (i = 0; i < num_sids; i++) {
		const char *s = sid_string_static(&sids[i]);
		safe_strcpy(ret + ofs, s, ret_size - ofs - 1);
		ofs += strlen(ret+ofs) + 1;
	}

	/* Send data back to client */
	state->response.data.num_entries = num_sids;
	state->response.extra_data.data = ret;
	state->response.length += ret_size;
	request_ok(state);
}

void winbindd_getuserdomgroups(struct winbindd_cli_state *state)
{
	DOM_SID user_sid;
	struct winbindd_domain *domain;

	/* Ensure null termination */
	state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';

	if (!string_to_sid(&user_sid, state->request.data.sid)) {
		DEBUG(1, ("Could not get convert sid %s from string\n",
			  state->request.data.sid));
		request_error(state);
		return;
	}

	/* Get info for the domain */	
	if ((domain = find_domain_from_sid_noinit(&user_sid)) == NULL) {
		DEBUG(0,("could not find domain entry for sid %s\n", 
			 sid_string_static(&user_sid)));
		request_error(state);
		return;
	}

	sendto_domain(state, domain);
}

enum winbindd_result winbindd_dual_getuserdomgroups(struct winbindd_domain *domain,
						    struct winbindd_cli_state *state)
{
	DOM_SID user_sid;
	NTSTATUS status;

	char *sidstring;
	ssize_t len;
	DOM_SID *groups;
	uint32 num_groups;

	/* Ensure null termination */
	state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';

	if (!string_to_sid(&user_sid, state->request.data.sid)) {
		DEBUG(1, ("Could not get convert sid %s from string\n",
			  state->request.data.sid));
		return WINBINDD_ERROR;
	}

	status = domain->methods->lookup_usergroups(domain, state->mem_ctx,
						    &user_sid, &num_groups,
						    &groups);
	if (!NT_STATUS_IS_OK(status))
		return WINBINDD_ERROR;

	if (num_groups == 0) {
		state->response.data.num_entries = 0;
		state->response.extra_data.data = NULL;
		return WINBINDD_OK;
	}

	if (!print_sidlist(state->mem_ctx, groups, num_groups, &sidstring, &len)) {
		DEBUG(0, ("talloc failed\n"));
		return WINBINDD_ERROR;
	}

	state->response.extra_data.data = SMB_STRDUP(sidstring);
	if (!state->response.extra_data.data) {
		return WINBINDD_ERROR;
	}
	state->response.length += len+1;
	state->response.data.num_entries = num_groups;

	return WINBINDD_OK;
}