summaryrefslogtreecommitdiff
path: root/source3/groupdb/mapping.c
blob: 514b44f5b4916c58f05c825a5b7c38a5562bb4c4 (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
/* 
 *  Unix SMB/CIFS implementation.
 *  RPC Pipe client / server routines
 *  Copyright (C) Andrew Tridgell              1992-2000,
 *  Copyright (C) Jean François Micouleau      1998-2001.
 *  Copyright (C) Volker Lendecke              2006.
 *  Copyright (C) Gerald Carter                2006.
 *  
 *  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 "groupdb/mapping.h"

/****************************************************************************
initialise first time the mapping list
****************************************************************************/
NTSTATUS add_initial_entry(gid_t gid, const char *sid, enum lsa_SidType sid_name_use, const char *nt_name, const char *comment)
{
	GROUP_MAP map;

	if(!init_group_mapping()) {
		DEBUG(0,("failed to initialize group mapping\n"));
		return NT_STATUS_UNSUCCESSFUL;
	}
	
	map.gid=gid;
	if (!string_to_sid(&map.sid, sid)) {
		DEBUG(0, ("string_to_sid failed: %s", sid));
		return NT_STATUS_UNSUCCESSFUL;
	}
	
	map.sid_name_use=sid_name_use;
	fstrcpy(map.nt_name, nt_name);
	fstrcpy(map.comment, comment);

	return pdb_add_group_mapping_entry(&map);
}

static NTSTATUS alias_memberships(const DOM_SID *members, size_t num_members,
				  DOM_SID **sids, size_t *num)
{
	size_t i;

	*num = 0;
	*sids = NULL;

	for (i=0; i<num_members; i++) {
		NTSTATUS status = one_alias_membership(&members[i], sids, num);
		if (!NT_STATUS_IS_OK(status))
			return status;
	}
	return NT_STATUS_OK;
}

struct aliasmem_closure {
	const DOM_SID *alias;
	DOM_SID **sids;
	size_t *num;
};



/*
 *
 * High level functions
 * better to use them than the lower ones.
 *
 * we are checking if the group is in the mapping file
 * and if the group is an existing unix group
 *
 */

/* get a domain group from it's SID */

BOOL get_domain_group_from_sid(DOM_SID sid, GROUP_MAP *map)
{
	struct group *grp;
	BOOL ret;
	
	if(!init_group_mapping()) {
		DEBUG(0,("failed to initialize group mapping\n"));
		return(False);
	}

	DEBUG(10, ("get_domain_group_from_sid\n"));

	/* if the group is NOT in the database, it CAN NOT be a domain group */
	
	become_root();
	ret = pdb_getgrsid(map, sid);
	unbecome_root();
	
	/* special case check for rid 513 */
	
	if ( !ret ) {
		uint32 rid;
		
		sid_peek_rid( &sid, &rid );
		
		if ( rid == DOMAIN_GROUP_RID_USERS ) {
			fstrcpy( map->nt_name, "None" );
			fstrcpy( map->comment, "Ordinary Users" );
			sid_copy( &map->sid, &sid );
			map->sid_name_use = SID_NAME_DOM_GRP;
			
			return True;
		}
		
		return False;
	}

	DEBUG(10, ("get_domain_group_from_sid: SID found in the TDB\n"));

	/* if it's not a domain group, continue */
	if (map->sid_name_use!=SID_NAME_DOM_GRP) {
		return False;
	}

	DEBUG(10, ("get_domain_group_from_sid: SID is a domain group\n"));
 	
	if (map->gid==-1) {
		return False;
	}

	DEBUG(10, ("get_domain_group_from_sid: SID is mapped to gid:%lu\n",(unsigned long)map->gid));
	
	grp = getgrgid(map->gid);
	if ( !grp ) {
		DEBUG(10, ("get_domain_group_from_sid: gid DOESN'T exist in UNIX security\n"));
		return False;
	}

	DEBUG(10, ("get_domain_group_from_sid: gid exists in UNIX security\n"));

	return True;
}

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

int smb_create_group(const char *unix_group, gid_t *new_gid)
{
	pstring add_script;
	int 	ret = -1;
	int 	fd = 0;
	
	*new_gid = 0;

	/* defer to scripts */
	
	if ( *lp_addgroup_script() ) {
		pstrcpy(add_script, lp_addgroup_script());
		pstring_sub(add_script, "%g", unix_group);
		ret = smbrun(add_script, &fd);
		DEBUG(ret ? 0 : 3,("smb_create_group: Running the command `%s' gave %d\n",add_script,ret));
		if (ret == 0) {
			smb_nscd_flush_group_cache();
		}
		if (ret != 0)
			return ret;

		if (fd != 0) {
			fstring output;

			*new_gid = 0;
			if (read(fd, output, sizeof(output)) > 0) {
				*new_gid = (gid_t)strtoul(output, NULL, 10);
			}
			
			close(fd);
		}

	}

	if (*new_gid == 0) {
		struct group *grp = getgrnam(unix_group);

		if (grp != NULL)
			*new_gid = grp->gr_gid;
	}
			
	return ret;	
}

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

int smb_delete_group(const char *unix_group)
{
	pstring del_script;
	int ret;

	/* defer to scripts */
	
	if ( *lp_delgroup_script() ) {
		pstrcpy(del_script, lp_delgroup_script());
		pstring_sub(del_script, "%g", unix_group);
		ret = smbrun(del_script,NULL);
		DEBUG(ret ? 0 : 3,("smb_delete_group: Running the command `%s' gave %d\n",del_script,ret));
		if (ret == 0) {
			smb_nscd_flush_group_cache();
		}
		return ret;
	}
		
	return -1;
}

/****************************************************************************
 Set a user's primary UNIX group.
****************************************************************************/
int smb_set_primary_group(const char *unix_group, const char* unix_user)
{
	pstring add_script;
	int ret;

	/* defer to scripts */
	
	if ( *lp_setprimarygroup_script() ) {
		pstrcpy(add_script, lp_setprimarygroup_script());
		all_string_sub(add_script, "%g", unix_group, sizeof(add_script));
		all_string_sub(add_script, "%u", unix_user, sizeof(add_script));
		ret = smbrun(add_script,NULL);
		flush_pwnam_cache();
		DEBUG(ret ? 0 : 3,("smb_set_primary_group: "
			 "Running the command `%s' gave %d\n",add_script,ret));
		if (ret == 0) {
			smb_nscd_flush_group_cache();
		}
		return ret;
	}

	return -1;
}

/****************************************************************************
 Add a user to a UNIX group.
****************************************************************************/

int smb_add_user_group(const char *unix_group, const char *unix_user)
{
	pstring add_script;
	int ret;

	/* defer to scripts */
	
	if ( *lp_addusertogroup_script() ) {
		pstrcpy(add_script, lp_addusertogroup_script());
		pstring_sub(add_script, "%g", unix_group);
		pstring_sub(add_script, "%u", unix_user);
		ret = smbrun(add_script,NULL);
		DEBUG(ret ? 0 : 3,("smb_add_user_group: Running the command `%s' gave %d\n",add_script,ret));
		if (ret == 0) {
			smb_nscd_flush_group_cache();
		}
		return ret;
	}
	
	return -1;
}

/****************************************************************************
 Delete a user from a UNIX group
****************************************************************************/

int smb_delete_user_group(const char *unix_group, const char *unix_user)
{
	pstring del_script;
	int ret;

	/* defer to scripts */
	
	if ( *lp_deluserfromgroup_script() ) {
		pstrcpy(del_script, lp_deluserfromgroup_script());
		pstring_sub(del_script, "%g", unix_group);
		pstring_sub(del_script, "%u", unix_user);
		ret = smbrun(del_script,NULL);
		DEBUG(ret ? 0 : 3,("smb_delete_user_group: Running the command `%s' gave %d\n",del_script,ret));
		if (ret == 0) {
			smb_nscd_flush_group_cache();
		}
		return ret;
	}
	
	return -1;
}


NTSTATUS pdb_default_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
				 DOM_SID sid)
{
	return get_group_map_from_sid(sid, map) ?
		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_default_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
				 gid_t gid)
{
	return get_group_map_from_gid(gid, map) ?
		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_default_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
				 const char *name)
{
	return get_group_map_from_ntname(name, map) ?
		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_default_add_group_mapping_entry(struct pdb_methods *methods,
						GROUP_MAP *map)
{
	return add_mapping_entry(map, TDB_INSERT) ?
		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_default_update_group_mapping_entry(struct pdb_methods *methods,
						   GROUP_MAP *map)
{
	return add_mapping_entry(map, TDB_REPLACE) ?
		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_default_delete_group_mapping_entry(struct pdb_methods *methods,
						   DOM_SID sid)
{
	return group_map_remove(&sid) ?
		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_default_enum_group_mapping(struct pdb_methods *methods,
					   const DOM_SID *sid, enum lsa_SidType sid_name_use,
					   GROUP_MAP **pp_rmap, size_t *p_num_entries,
					   BOOL unix_only)
{
	return enum_group_mapping(sid, sid_name_use, pp_rmap, p_num_entries, unix_only) ?
		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_default_create_alias(struct pdb_methods *methods,
				  const char *name, uint32 *rid)
{
	DOM_SID sid;
	enum lsa_SidType type;
	uint32 new_rid;
	gid_t gid;
	BOOL exists;
	GROUP_MAP map;
	TALLOC_CTX *mem_ctx;
	NTSTATUS status;

	DEBUG(10, ("Trying to create alias %s\n", name));

	mem_ctx = talloc_new(NULL);
	if (mem_ctx == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	exists = lookup_name(mem_ctx, name, LOOKUP_NAME_ISOLATED,
			     NULL, NULL, &sid, &type);
	TALLOC_FREE(mem_ctx);

	if (exists) {
		return NT_STATUS_ALIAS_EXISTS;
	}

	if (!winbind_allocate_gid(&gid)) {
		DEBUG(3, ("Could not get a gid out of winbind\n"));
		return NT_STATUS_ACCESS_DENIED;
	}

	if (!pdb_new_rid(&new_rid)) {
		DEBUG(0, ("Could not allocate a RID -- wasted a gid :-(\n"));
		return NT_STATUS_ACCESS_DENIED;
	}

	DEBUG(10, ("Creating alias %s with gid %d and rid %d\n",
		   name, gid, new_rid));

	sid_copy(&sid, get_global_sam_sid());
	sid_append_rid(&sid, new_rid);

	map.gid = gid;
	sid_copy(&map.sid, &sid);
	map.sid_name_use = SID_NAME_ALIAS;
	fstrcpy(map.nt_name, name);
	fstrcpy(map.comment, "");

	status = pdb_add_group_mapping_entry(&map);

	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(0, ("Could not add group mapping entry for alias %s "
			  "(%s)\n", name, nt_errstr(status)));
		return status;
	}

	*rid = new_rid;

	return NT_STATUS_OK;
}

NTSTATUS pdb_default_delete_alias(struct pdb_methods *methods,
				  const DOM_SID *sid)
{
	return pdb_delete_group_mapping_entry(*sid);
}

NTSTATUS pdb_default_get_aliasinfo(struct pdb_methods *methods,
				   const DOM_SID *sid,
				   struct acct_info *info)
{
	GROUP_MAP map;

	if (!pdb_getgrsid(&map, *sid))
		return NT_STATUS_NO_SUCH_ALIAS;

	if ((map.sid_name_use != SID_NAME_ALIAS) &&
	    (map.sid_name_use != SID_NAME_WKN_GRP)) {
		DEBUG(2, ("%s is a %s, expected an alias\n",
			  sid_string_static(sid),
			  sid_type_lookup(map.sid_name_use)));
		return NT_STATUS_NO_SUCH_ALIAS;
	}

	fstrcpy(info->acct_name, map.nt_name);
	fstrcpy(info->acct_desc, map.comment);
	sid_peek_rid(&map.sid, &info->rid);
	return NT_STATUS_OK;
}

NTSTATUS pdb_default_set_aliasinfo(struct pdb_methods *methods,
				   const DOM_SID *sid,
				   struct acct_info *info)
{
	GROUP_MAP map;

	if (!pdb_getgrsid(&map, *sid))
		return NT_STATUS_NO_SUCH_ALIAS;

	fstrcpy(map.nt_name, info->acct_name);
	fstrcpy(map.comment, info->acct_desc);

	return pdb_update_group_mapping_entry(&map);
}

NTSTATUS pdb_default_add_aliasmem(struct pdb_methods *methods,
				  const DOM_SID *alias, const DOM_SID *member)
{
	return add_aliasmem(alias, member);
}

NTSTATUS pdb_default_del_aliasmem(struct pdb_methods *methods,
				  const DOM_SID *alias, const DOM_SID *member)
{
	return del_aliasmem(alias, member);
}

NTSTATUS pdb_default_enum_aliasmem(struct pdb_methods *methods,
				   const DOM_SID *alias, DOM_SID **pp_members,
				   size_t *p_num_members)
{
	return enum_aliasmem(alias, pp_members, p_num_members);
}

NTSTATUS pdb_default_alias_memberships(struct pdb_methods *methods,
				       TALLOC_CTX *mem_ctx,
				       const DOM_SID *domain_sid,
				       const DOM_SID *members,
				       size_t num_members,
				       uint32 **pp_alias_rids,
				       size_t *p_num_alias_rids)
{
	DOM_SID *alias_sids;
	size_t i, num_alias_sids;
	NTSTATUS result;

	alias_sids = NULL;
	num_alias_sids = 0;

	result = alias_memberships(members, num_members,
				   &alias_sids, &num_alias_sids);

	if (!NT_STATUS_IS_OK(result))
		return result;

	*p_num_alias_rids = 0;

	if (num_alias_sids == 0) {
		TALLOC_FREE(alias_sids);
		return NT_STATUS_OK;
	}

	*pp_alias_rids = TALLOC_ARRAY(mem_ctx, uint32, num_alias_sids);
	if (*pp_alias_rids == NULL)
		return NT_STATUS_NO_MEMORY;

	for (i=0; i<num_alias_sids; i++) {
		if (!sid_peek_check_rid(domain_sid, &alias_sids[i],
					&(*pp_alias_rids)[*p_num_alias_rids]))
			continue;
		*p_num_alias_rids += 1;
	}

	TALLOC_FREE(alias_sids);

	return NT_STATUS_OK;
}

/**********************************************************************
 no ops for passdb backends that don't implement group mapping
 *********************************************************************/

NTSTATUS pdb_nop_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
				 DOM_SID sid)
{
	return NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_nop_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
				 gid_t gid)
{
	return NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_nop_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
				 const char *name)
{
	return NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_nop_add_group_mapping_entry(struct pdb_methods *methods,
						GROUP_MAP *map)
{
	return NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_nop_update_group_mapping_entry(struct pdb_methods *methods,
						   GROUP_MAP *map)
{
	return NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_nop_delete_group_mapping_entry(struct pdb_methods *methods,
						   DOM_SID sid)
{
	return NT_STATUS_UNSUCCESSFUL;
}

NTSTATUS pdb_nop_enum_group_mapping(struct pdb_methods *methods,
					   enum lsa_SidType sid_name_use,
					   GROUP_MAP **rmap, size_t *num_entries,
					   BOOL unix_only)
{
	return NT_STATUS_UNSUCCESSFUL;
}

/****************************************************************************
 These need to be redirected through pdb_interface.c
****************************************************************************/
BOOL pdb_get_dom_grp_info(const DOM_SID *sid, struct acct_info *info)
{
	GROUP_MAP map;
	BOOL res;

	become_root();
	res = get_domain_group_from_sid(*sid, &map);
	unbecome_root();

	if (!res)
		return False;

	fstrcpy(info->acct_name, map.nt_name);
	fstrcpy(info->acct_desc, map.comment);
	sid_peek_rid(sid, &info->rid);
	return True;
}

BOOL pdb_set_dom_grp_info(const DOM_SID *sid, const struct acct_info *info)
{
	GROUP_MAP map;

	if (!get_domain_group_from_sid(*sid, &map))
		return False;

	fstrcpy(map.nt_name, info->acct_name);
	fstrcpy(map.comment, info->acct_desc);

	return NT_STATUS_IS_OK(pdb_update_group_mapping_entry(&map));
}

/********************************************************************
 Really just intended to be called by smbd
********************************************************************/

NTSTATUS pdb_create_builtin_alias(uint32 rid)
{
	DOM_SID sid;
	enum lsa_SidType type;
	gid_t gid;
	GROUP_MAP map;
	TALLOC_CTX *mem_ctx;
	NTSTATUS status;
	const char *name = NULL;
	fstring groupname;

	DEBUG(10, ("Trying to create builtin alias %d\n", rid));
	
	if ( !sid_compose( &sid, &global_sid_Builtin, rid ) ) {
		return NT_STATUS_NO_SUCH_ALIAS;
	}
	
	if ( (mem_ctx = talloc_new(NULL)) == NULL ) {
		return NT_STATUS_NO_MEMORY;
	}
	
	if ( !lookup_sid(mem_ctx, &sid, NULL, &name, &type) ) {
		TALLOC_FREE( mem_ctx );
		return NT_STATUS_NO_SUCH_ALIAS;
	}
	
	/* validate RID so copy the name and move on */
		
	fstrcpy( groupname, name );
	TALLOC_FREE( mem_ctx );

	if (!winbind_allocate_gid(&gid)) {
		DEBUG(3, ("pdb_create_builtin_alias: Could not get a gid out of winbind\n"));
		return NT_STATUS_ACCESS_DENIED;
	}

	DEBUG(10,("Creating alias %s with gid %d\n", name, gid));

	map.gid = gid;
	sid_copy(&map.sid, &sid);
	map.sid_name_use = SID_NAME_ALIAS;
	fstrcpy(map.nt_name, name);
	fstrcpy(map.comment, "");

	status = pdb_add_group_mapping_entry(&map);

	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(0, ("pdb_create_builtin_alias: Could not add group mapping entry for alias %d "
			  "(%s)\n", rid, nt_errstr(status)));
	}

	return status;
}