summaryrefslogtreecommitdiffstats
path: root/source3/winbindd/winbindd_sid.c
blob: 641b18ebbd8fbdd7ba31ca05738261374d4ed285 (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
/* 
   Unix SMB/CIFS implementation.

   Winbind daemon - sid related functions

   Copyright (C) Tim Potter 2000
   
   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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "winbindd.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND

/* Convert a string  */

static void lookupsid_recv(void *private_data, bool success,
			   const char *dom_name, const char *name,
			   enum lsa_SidType type);

void winbindd_lookupsid(struct winbindd_cli_state *state)
{
	DOM_SID sid;

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

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

	if (!string_to_sid(&sid, state->request.data.sid)) {
		DEBUG(5, ("%s not a SID\n", state->request.data.sid));
		request_error(state);
		return;
	}

	winbindd_lookupsid_async(state->mem_ctx, &sid, lookupsid_recv, state);
}

static void lookupsid_recv(void *private_data, bool success,
			   const char *dom_name, const char *name,
			   enum lsa_SidType type)
{
	struct winbindd_cli_state *state =
		talloc_get_type_abort(private_data, struct winbindd_cli_state);

	if (!success) {
		DEBUG(5, ("lookupsid returned an error\n"));
		request_error(state);
		return;
	}

	fstrcpy(state->response.data.name.dom_name, dom_name);
	fstrcpy(state->response.data.name.name, name);
	state->response.data.name.type = type;
	request_ok(state);
}

/**
 * Look up the SID for a qualified name.  
 **/

static void lookupname_recv(void *private_data, bool success,
			    const DOM_SID *sid, enum lsa_SidType type);

void winbindd_lookupname(struct winbindd_cli_state *state)
{
	char *name_domain, *name_user;
	char *p;

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

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

	/* cope with the name being a fully qualified name */
	p = strstr(state->request.data.name.name, lp_winbind_separator());
	if (p) {
		*p = 0;
		name_domain = state->request.data.name.name;
		name_user = p+1;
	} else {
		name_domain = state->request.data.name.dom_name;
		name_user = state->request.data.name.name;
	}

	DEBUG(3, ("[%5lu]: lookupname %s%s%s\n", (unsigned long)state->pid,
		  name_domain, lp_winbind_separator(), name_user));

	winbindd_lookupname_async(state->mem_ctx, name_domain, name_user,
				  lookupname_recv, WINBINDD_LOOKUPNAME, 
				  state);
}

static void lookupname_recv(void *private_data, bool success,
			    const DOM_SID *sid, enum lsa_SidType type)
{
	struct winbindd_cli_state *state =
		talloc_get_type_abort(private_data, struct winbindd_cli_state);

	if (!success) {
		DEBUG(5, ("lookupname returned an error\n"));
		request_error(state);
		return;
	}

	sid_to_fstring(state->response.data.sid.sid, sid);
	state->response.data.sid.type = type;
	request_ok(state);
	return;
}

void winbindd_lookuprids(struct winbindd_cli_state *state)
{
	struct winbindd_domain *domain;
	DOM_SID domain_sid;
	
	/* Ensure null termination */
	state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';

	DEBUG(10, ("lookup_rids: %s\n", state->request.data.sid));

	if (!string_to_sid(&domain_sid, state->request.data.sid)) {
		DEBUG(5, ("Could not convert %s to SID\n",
			  state->request.data.sid));
		request_error(state);
		return;
	}

	domain = find_lookup_domain_from_sid(&domain_sid);
	if (domain == NULL) {
		DEBUG(10, ("Could not find domain for name %s\n",
			   state->request.domain_name));
		request_error(state);
		return;
	}

	sendto_domain(state, domain);
}

/* Convert a sid to a uid.  We assume we only have one rid attached to the
   sid. */

static void sid2uid_recv(void *private_data, bool success, uid_t uid)
{
	struct winbindd_cli_state *state =
		talloc_get_type_abort(private_data, struct winbindd_cli_state);
	struct dom_sid sid;

	string_to_sid(&sid, state->request.data.sid);

	if (!success) {
		DEBUG(5, ("Could not convert sid %s\n",
			  state->request.data.sid));
		request_error(state);
		return;
	}

	state->response.data.uid = uid;
	request_ok(state);
}

static void sid2uid_lookupsid_recv( void *private_data, bool success, 
				    const char *domain_name, 
				    const char *name, 
				    enum lsa_SidType type)
{
	struct winbindd_cli_state *state =
		talloc_get_type_abort(private_data, struct winbindd_cli_state);
	DOM_SID sid;

	if (!string_to_sid(&sid, state->request.data.sid)) {
		DEBUG(1, ("sid2uid_lookupsid_recv: Could not get convert sid "
			  "%s from string\n", state->request.data.sid));
		request_error(state);
		return;
	}

	if (!success) {
		DEBUG(5, ("sid2uid_lookupsid_recv Could not convert get sid type for %s\n",
			  state->request.data.sid));
		goto fail;
	}

	if ( (type!=SID_NAME_USER) && (type!=SID_NAME_COMPUTER) ) {
		DEBUG(5,("sid2uid_lookupsid_recv: Sid %s is not a user or a computer.\n", 
			 state->request.data.sid));
		goto fail;
	}

	/* always use the async interface (may block) */
	winbindd_sid2uid_async(state->mem_ctx, &sid, sid2uid_recv, state);
	return;

 fail:
	/*
	 * We have to set the cache ourselves here, the child which is
	 * normally responsible was not queried yet.
	 */
	idmap_cache_set_sid2uid(&sid, -1);
	request_error(state);
	return;
}

void winbindd_sid_to_uid(struct winbindd_cli_state *state)
{
	DOM_SID sid;
	uid_t uid;
	bool expired;

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

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

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

	if (idmap_cache_find_sid2uid(&sid, &uid, &expired)) {
		DEBUG(10, ("idmap_cache_find_sid2uid found %d%s\n",
			   (int)uid, expired ? " (expired)": ""));
		if (expired && IS_DOMAIN_ONLINE(find_our_domain())) {
			DEBUG(10, ("revalidating expired entry\n"));
			goto backend;
		}
		if (uid == -1) {
			DEBUG(10, ("Returning negative cache entry\n"));
			request_error(state);
			return;
		}
		DEBUG(10, ("Returning positive cache entry\n"));
		state->response.data.uid = uid;
		request_ok(state);
		return;
	}

	/* Validate the SID as a user.  Hopefully this will hit cache.
	   Needed to prevent DoS by exhausting the uid allocation
	   range from random SIDs. */

 backend:
	winbindd_lookupsid_async( state->mem_ctx, &sid, sid2uid_lookupsid_recv, state );
}

/* Convert a sid to a gid.  We assume we only have one rid attached to the
   sid.*/

static void sid2gid_recv(void *private_data, bool success, gid_t gid)
{
	struct winbindd_cli_state *state =
		talloc_get_type_abort(private_data, struct winbindd_cli_state);
	struct dom_sid sid;

	string_to_sid(&sid, state->request.data.sid);

	if (!success) {
		DEBUG(5, ("Could not convert sid %s\n",
			  state->request.data.sid));
		request_error(state);
		return;
	}

	state->response.data.gid = gid;
	request_ok(state);
}

static void sid2gid_lookupsid_recv( void *private_data, bool success, 
				    const char *domain_name, 
				    const char *name, 
				    enum lsa_SidType type)
{
	struct winbindd_cli_state *state =
		talloc_get_type_abort(private_data, struct winbindd_cli_state);
	DOM_SID sid;

	if (!string_to_sid(&sid, state->request.data.sid)) {
		DEBUG(1, ("sid2gid_lookupsid_recv: Could not get convert sid "
			  "%s from string\n", state->request.data.sid));
		request_error(state);
		return;
	}

	if (!success) {
		DEBUG(5, ("sid2gid_lookupsid_recv: Could not get sid type for %s\n",
			  state->request.data.sid));
		goto fail;
	}

	if ( (type!=SID_NAME_DOM_GRP) &&
	     (type!=SID_NAME_ALIAS) && 
	     (type!=SID_NAME_WKN_GRP) ) 
	{
		DEBUG(5,("sid2gid_lookupsid_recv: Sid %s is not a group.\n", 
			 state->request.data.sid));
		goto fail;
	}

	/* always use the async interface (may block) */
	winbindd_sid2gid_async(state->mem_ctx, &sid, sid2gid_recv, state);
	return;

 fail:
	/*
	 * We have to set the cache ourselves here, the child which is
	 * normally responsible was not queried yet.
	 */
	idmap_cache_set_sid2gid(&sid, -1);
	request_error(state);
	return;
}

void winbindd_sid_to_gid(struct winbindd_cli_state *state)
{
	DOM_SID sid;
	gid_t gid;
	bool expired;

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

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

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

	if (idmap_cache_find_sid2gid(&sid, &gid, &expired)) {
		DEBUG(10, ("idmap_cache_find_sid2gid found %d%s\n",
			   (int)gid, expired ? " (expired)": ""));
		if (expired && IS_DOMAIN_ONLINE(find_our_domain())) {
			DEBUG(10, ("revalidating expired entry\n"));
			goto backend;
		}
		if (gid == -1) {
			DEBUG(10, ("Returning negative cache entry\n"));
			request_error(state);
			return;
		}
		DEBUG(10, ("Returning positive cache entry\n"));
		state->response.data.gid = gid;
		request_ok(state);
		return;
	}

	/* Validate the SID as a group.  Hopefully this will hit cache.
	   Needed to prevent DoS by exhausting the uid allocation
	   range from random SIDs. */

 backend:
	winbindd_lookupsid_async( state->mem_ctx, &sid, sid2gid_lookupsid_recv,
				  state );
}

static void set_mapping_recv(void *private_data, bool success)
{
	struct winbindd_cli_state *state =
		talloc_get_type_abort(private_data, struct winbindd_cli_state);

	if (!success) {
		DEBUG(5, ("Could not set sid mapping\n"));
		request_error(state);
		return;
	}

	request_ok(state);
}

void winbindd_set_mapping(struct winbindd_cli_state *state)
{
	struct id_map map;
	DOM_SID sid;

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

	if ( ! state->privileged) {
		DEBUG(0, ("Only root is allowed to set mappings!\n"));
		request_error(state);
		return;
	}

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

	map.sid = &sid;
	map.xid.id = state->request.data.dual_idmapset.id;
	map.xid.type = state->request.data.dual_idmapset.type;

	winbindd_set_mapping_async(state->mem_ctx, &map,
			set_mapping_recv, state);
}

static void remove_mapping_recv(void *private_data, bool success)
{
	struct winbindd_cli_state *state =
		talloc_get_type_abort(private_data, struct winbindd_cli_state);

	if (!success) {
		DEBUG(5, ("Could not remove sid mapping\n"));
		request_error(state);
		return;
	}

	request_ok(state);
}

void winbindd_remove_mapping(struct winbindd_cli_state *state)
{
	struct id_map map;
	DOM_SID sid;

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

	if ( ! state->privileged) {
		DEBUG(0, ("Only root is allowed to remove mappings!\n"));
		request_error(state);
		return;
	}

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

	map.sid = &sid;
	map.xid.id = state->request.data.dual_idmapset.id;
	map.xid.type = state->request.data.dual_idmapset.type;

	winbindd_remove_mapping_async(state->mem_ctx, &map,
			remove_mapping_recv, state);
}

static void set_hwm_recv(void *private_data, bool success)
{
	struct winbindd_cli_state *state =
		talloc_get_type_abort(private_data, struct winbindd_cli_state);

	if (!success) {
		DEBUG(5, ("Could not set sid mapping\n"));
		request_error(state);
		return;
	}

	request_ok(state);
}

void winbindd_set_hwm(struct winbindd_cli_state *state)
{
	struct unixid xid;

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

	if ( ! state->privileged) {
		DEBUG(0, ("Only root is allowed to set mappings!\n"));
		request_error(state);
		return;
	}

	xid.id = state->request.data.dual_idmapset.id;
	xid.type = state->request.data.dual_idmapset.type;

	winbindd_set_hwm_async(state->mem_ctx, &xid, set_hwm_recv, state);
}

/* Convert a uid to a sid */

static void uid2sid_recv(void *private_data, bool success, const char *sidstr)
{
	struct winbindd_cli_state *state =
		(struct winbindd_cli_state *)private_data;
	struct dom_sid sid;

	if (!success || !string_to_sid(&sid, sidstr)) {
		ZERO_STRUCT(sid);
		idmap_cache_set_sid2uid(&sid, state->request.data.uid);
		request_error(state);
		return;
	}

	DEBUG(10,("uid2sid: uid %lu has sid %s\n",
		  (unsigned long)(state->request.data.uid), sidstr));

	idmap_cache_set_sid2uid(&sid, state->request.data.uid);
	fstrcpy(state->response.data.sid.sid, sidstr);
	state->response.data.sid.type = SID_NAME_USER;
	request_ok(state);
	return;
}

void winbindd_uid_to_sid(struct winbindd_cli_state *state)
{
	struct dom_sid sid;
	bool expired;

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

	if (idmap_cache_find_uid2sid(state->request.data.uid, &sid,
				     &expired)) {
		DEBUG(10, ("idmap_cache_find_uid2sid found %d%s\n",
			   (int)state->request.data.uid,
			   expired ? " (expired)": ""));
		if (expired && IS_DOMAIN_ONLINE(find_our_domain())) {
			DEBUG(10, ("revalidating expired entry\n"));
			goto backend;
		}
		if (is_null_sid(&sid)) {
			DEBUG(10, ("Returning negative cache entry\n"));
			request_error(state);
			return;
		}
		DEBUG(10, ("Returning positive cache entry\n"));
		sid_to_fstring(state->response.data.sid.sid, &sid);
		request_ok(state);
		return;
	}

	/* always go via the async interface (may block) */
 backend:
	winbindd_uid2sid_async(state->mem_ctx, state->request.data.uid, uid2sid_recv, state);
}

/* Convert a gid to a sid */

static void gid2sid_recv(void *private_data, bool success, const char *sidstr)
{
	struct winbindd_cli_state *state =
		(struct winbindd_cli_state *)private_data;
	struct dom_sid sid;

	if (!success || !string_to_sid(&sid, sidstr)) {
		ZERO_STRUCT(sid);
		idmap_cache_set_sid2gid(&sid, state->request.data.gid);
		request_error(state);
		return;
	}
	DEBUG(10,("gid2sid: gid %lu has sid %s\n",
		  (unsigned long)(state->request.data.gid), sidstr));

	idmap_cache_set_sid2gid(&sid, state->request.data.gid);
	fstrcpy(state->response.data.sid.sid, sidstr);
	state->response.data.sid.type = SID_NAME_DOM_GRP;
	request_ok(state);
	return;
}


void winbindd_gid_to_sid(struct winbindd_cli_state *state)
{
	struct dom_sid sid;
	bool expired;

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

	if (idmap_cache_find_gid2sid(state->request.data.gid, &sid,
				     &expired)) {
		DEBUG(10, ("idmap_cache_find_gid2sid found %d%s\n",
			   (int)state->request.data.gid,
			   expired ? " (expired)": ""));
		if (expired && IS_DOMAIN_ONLINE(find_our_domain())) {
			DEBUG(10, ("revalidating expired entry\n"));
			goto backend;
		}
		if (is_null_sid(&sid)) {
			DEBUG(10, ("Returning negative cache entry\n"));
			request_error(state);
			return;
		}
		DEBUG(10, ("Returning positive cache entry\n"));
		sid_to_fstring(state->response.data.sid.sid, &sid);
		request_ok(state);
		return;
	}

	/* always use async calls (may block) */
 backend:
	winbindd_gid2sid_async(state->mem_ctx, state->request.data.gid, gid2sid_recv, state);
}

void winbindd_allocate_uid(struct winbindd_cli_state *state)
{
	if ( !state->privileged ) {
		DEBUG(2, ("winbindd_allocate_uid: non-privileged access "
			  "denied!\n"));
		request_error(state);
		return;
	}

	sendto_child(state, idmap_child());
}

enum winbindd_result winbindd_dual_allocate_uid(struct winbindd_domain *domain,
						struct winbindd_cli_state *state)
{
	struct unixid xid;

	if (!NT_STATUS_IS_OK(idmap_allocate_uid(&xid))) {
		return WINBINDD_ERROR;
	}
	state->response.data.uid = xid.id;
	return WINBINDD_OK;
}

void winbindd_allocate_gid(struct winbindd_cli_state *state)
{
	if ( !state->privileged ) {
		DEBUG(2, ("winbindd_allocate_gid: non-privileged access "
			  "denied!\n"));
		request_error(state);
		return;
	}

	sendto_child(state, idmap_child());
}

enum winbindd_result winbindd_dual_allocate_gid(struct winbindd_domain *domain,
						struct winbindd_cli_state *state)
{
	struct unixid xid;

	if (!NT_STATUS_IS_OK(idmap_allocate_gid(&xid))) {
		return WINBINDD_ERROR;
	}
	state->response.data.gid = xid.id;
	return WINBINDD_OK;
}