source: branches/samba-3.3.x/source/winbindd/winbindd_sid.c

Last change on this file was 309, checked in by Herwig Bauernfeind, 16 years ago

Update 3.3 to 3.3.7
File size: 17.5 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 Winbind daemon - sid related functions
5
6 Copyright (C) Tim Potter 2000
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20*/
21
22#include "includes.h"
23#include "winbindd.h"
24
25#undef DBGC_CLASS
26#define DBGC_CLASS DBGC_WINBIND
27
28/* Convert a string */
29
30static void lookupsid_recv(void *private_data, bool success,
31 const char *dom_name, const char *name,
32 enum lsa_SidType type);
33
34void winbindd_lookupsid(struct winbindd_cli_state *state)
35{
36 DOM_SID sid;
37
38 /* Ensure null termination */
39 state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';
40
41 DEBUG(3, ("[%5lu]: lookupsid %s\n", (unsigned long)state->pid,
42 state->request.data.sid));
43
44 if (!string_to_sid(&sid, state->request.data.sid)) {
45 DEBUG(5, ("%s not a SID\n", state->request.data.sid));
46 request_error(state);
47 return;
48 }
49
50 winbindd_lookupsid_async(state->mem_ctx, &sid, lookupsid_recv, state);
51}
52
53static void lookupsid_recv(void *private_data, bool success,
54 const char *dom_name, const char *name,
55 enum lsa_SidType type)
56{
57 struct winbindd_cli_state *state =
58 talloc_get_type_abort(private_data, struct winbindd_cli_state);
59
60 if (!success) {
61 DEBUG(5, ("lookupsid returned an error\n"));
62 request_error(state);
63 return;
64 }
65
66 fstrcpy(state->response.data.name.dom_name, dom_name);
67 fstrcpy(state->response.data.name.name, name);
68 state->response.data.name.type = type;
69 request_ok(state);
70}
71
72/**
73 * Look up the SID for a qualified name.
74 **/
75
76static void lookupname_recv(void *private_data, bool success,
77 const DOM_SID *sid, enum lsa_SidType type);
78
79void winbindd_lookupname(struct winbindd_cli_state *state)
80{
81 char *name_domain, *name_user;
82 char *p;
83
84 /* Ensure null termination */
85 state->request.data.name.dom_name[sizeof(state->request.data.name.dom_name)-1]='\0';
86
87 /* Ensure null termination */
88 state->request.data.name.name[sizeof(state->request.data.name.name)-1]='\0';
89
90 /* cope with the name being a fully qualified name */
91 p = strstr(state->request.data.name.name, lp_winbind_separator());
92 if (p) {
93 *p = 0;
94 name_domain = state->request.data.name.name;
95 name_user = p+1;
96 } else if ((p = strchr(state->request.data.name.name, '@')) != NULL) {
97 /* upn */
98 name_domain = p + 1;
99 *p = 0;
100 name_user = state->request.data.name.name;
101 } else {
102 name_domain = state->request.data.name.dom_name;
103 name_user = state->request.data.name.name;
104 }
105
106 DEBUG(3, ("[%5lu]: lookupname %s%s%s\n", (unsigned long)state->pid,
107 name_domain, lp_winbind_separator(), name_user));
108
109 winbindd_lookupname_async(state->mem_ctx, name_domain, name_user,
110 lookupname_recv, WINBINDD_LOOKUPNAME,
111 state);
112}
113
114static void lookupname_recv(void *private_data, bool success,
115 const DOM_SID *sid, enum lsa_SidType type)
116{
117 struct winbindd_cli_state *state =
118 talloc_get_type_abort(private_data, struct winbindd_cli_state);
119
120 if (!success) {
121 DEBUG(5, ("lookupname returned an error\n"));
122 request_error(state);
123 return;
124 }
125
126 sid_to_fstring(state->response.data.sid.sid, sid);
127 state->response.data.sid.type = type;
128 request_ok(state);
129 return;
130}
131
132void winbindd_lookuprids(struct winbindd_cli_state *state)
133{
134 struct winbindd_domain *domain;
135 DOM_SID domain_sid;
136
137 /* Ensure null termination */
138 state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';
139
140 DEBUG(10, ("lookup_rids: %s\n", state->request.data.sid));
141
142 if (!string_to_sid(&domain_sid, state->request.data.sid)) {
143 DEBUG(5, ("Could not convert %s to SID\n",
144 state->request.data.sid));
145 request_error(state);
146 return;
147 }
148
149 domain = find_lookup_domain_from_sid(&domain_sid);
150 if (domain == NULL) {
151 DEBUG(10, ("Could not find domain for name %s\n",
152 state->request.domain_name));
153 request_error(state);
154 return;
155 }
156
157 sendto_domain(state, domain);
158}
159
160/* Convert a sid to a uid. We assume we only have one rid attached to the
161 sid. */
162
163static void sid2uid_recv(void *private_data, bool success, uid_t uid)
164{
165 struct winbindd_cli_state *state =
166 talloc_get_type_abort(private_data, struct winbindd_cli_state);
167 struct dom_sid sid;
168
169 string_to_sid(&sid, state->request.data.sid);
170
171 if (!success) {
172 DEBUG(5, ("Could not convert sid %s\n",
173 state->request.data.sid));
174 request_error(state);
175 return;
176 }
177
178 state->response.data.uid = uid;
179 request_ok(state);
180}
181
182static void sid2uid_lookupsid_recv( void *private_data, bool success,
183 const char *domain_name,
184 const char *name,
185 enum lsa_SidType type)
186{
187 struct winbindd_cli_state *state =
188 talloc_get_type_abort(private_data, struct winbindd_cli_state);
189 DOM_SID sid;
190
191 if (!string_to_sid(&sid, state->request.data.sid)) {
192 DEBUG(1, ("sid2uid_lookupsid_recv: Could not get convert sid "
193 "%s from string\n", state->request.data.sid));
194 request_error(state);
195 return;
196 }
197
198 if (!success) {
199 DEBUG(5, ("sid2uid_lookupsid_recv Could not convert get sid type for %s\n",
200 state->request.data.sid));
201 goto fail;
202 }
203
204 if ( (type!=SID_NAME_USER) && (type!=SID_NAME_COMPUTER) ) {
205 DEBUG(5,("sid2uid_lookupsid_recv: Sid %s is not a user or a computer.\n",
206 state->request.data.sid));
207 goto fail;
208 }
209
210 /* always use the async interface (may block) */
211 winbindd_sid2uid_async(state->mem_ctx, &sid, sid2uid_recv, state);
212 return;
213
214 fail:
215 /*
216 * We have to set the cache ourselves here, the child which is
217 * normally responsible was not queried yet.
218 */
219 idmap_cache_set_sid2uid(&sid, -1);
220 request_error(state);
221 return;
222}
223
224void winbindd_sid_to_uid(struct winbindd_cli_state *state)
225{
226 DOM_SID sid;
227 uid_t uid;
228 bool expired;
229
230 /* Ensure null termination */
231 state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';
232
233 DEBUG(3, ("[%5lu]: sid to uid %s\n", (unsigned long)state->pid,
234 state->request.data.sid));
235
236 if (!string_to_sid(&sid, state->request.data.sid)) {
237 DEBUG(1, ("Could not get convert sid %s from string\n",
238 state->request.data.sid));
239 request_error(state);
240 return;
241 }
242
243 if (idmap_cache_find_sid2uid(&sid, &uid, &expired)) {
244 DEBUG(10, ("idmap_cache_find_sid2uid found %d%s\n",
245 (int)uid, expired ? " (expired)": ""));
246 if (expired && IS_DOMAIN_ONLINE(find_our_domain())) {
247 DEBUG(10, ("revalidating expired entry\n"));
248 goto backend;
249 }
250 if (uid == -1) {
251 DEBUG(10, ("Returning negative cache entry\n"));
252 request_error(state);
253 return;
254 }
255 DEBUG(10, ("Returning positive cache entry\n"));
256 state->response.data.uid = uid;
257 request_ok(state);
258 return;
259 }
260
261 /* Validate the SID as a user. Hopefully this will hit cache.
262 Needed to prevent DoS by exhausting the uid allocation
263 range from random SIDs. */
264
265 backend:
266 winbindd_lookupsid_async( state->mem_ctx, &sid, sid2uid_lookupsid_recv, state );
267}
268
269/* Convert a sid to a gid. We assume we only have one rid attached to the
270 sid.*/
271
272static void sid2gid_recv(void *private_data, bool success, gid_t gid)
273{
274 struct winbindd_cli_state *state =
275 talloc_get_type_abort(private_data, struct winbindd_cli_state);
276 struct dom_sid sid;
277
278 string_to_sid(&sid, state->request.data.sid);
279
280 if (!success) {
281 DEBUG(5, ("Could not convert sid %s\n",
282 state->request.data.sid));
283 request_error(state);
284 return;
285 }
286
287 state->response.data.gid = gid;
288 request_ok(state);
289}
290
291static void sid2gid_lookupsid_recv( void *private_data, bool success,
292 const char *domain_name,
293 const char *name,
294 enum lsa_SidType type)
295{
296 struct winbindd_cli_state *state =
297 talloc_get_type_abort(private_data, struct winbindd_cli_state);
298 DOM_SID sid;
299
300 if (!string_to_sid(&sid, state->request.data.sid)) {
301 DEBUG(1, ("sid2gid_lookupsid_recv: Could not get convert sid "
302 "%s from string\n", state->request.data.sid));
303 request_error(state);
304 return;
305 }
306
307 if (!success) {
308 DEBUG(5, ("sid2gid_lookupsid_recv: Could not get sid type for %s\n",
309 state->request.data.sid));
310 goto fail;
311 }
312
313 if ( (type!=SID_NAME_DOM_GRP) &&
314 (type!=SID_NAME_ALIAS) &&
315 (type!=SID_NAME_WKN_GRP) )
316 {
317 DEBUG(5,("sid2gid_lookupsid_recv: Sid %s is not a group.\n",
318 state->request.data.sid));
319 goto fail;
320 }
321
322 /* always use the async interface (may block) */
323 winbindd_sid2gid_async(state->mem_ctx, &sid, sid2gid_recv, state);
324 return;
325
326 fail:
327 /*
328 * We have to set the cache ourselves here, the child which is
329 * normally responsible was not queried yet.
330 */
331 idmap_cache_set_sid2gid(&sid, -1);
332 request_error(state);
333 return;
334}
335
336void winbindd_sid_to_gid(struct winbindd_cli_state *state)
337{
338 DOM_SID sid;
339 gid_t gid;
340 bool expired;
341
342 /* Ensure null termination */
343 state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';
344
345 DEBUG(3, ("[%5lu]: sid to gid %s\n", (unsigned long)state->pid,
346 state->request.data.sid));
347
348 if (!string_to_sid(&sid, state->request.data.sid)) {
349 DEBUG(1, ("Could not get convert sid %s from string\n",
350 state->request.data.sid));
351 request_error(state);
352 return;
353 }
354
355 if (idmap_cache_find_sid2gid(&sid, &gid, &expired)) {
356 DEBUG(10, ("idmap_cache_find_sid2gid found %d%s\n",
357 (int)gid, expired ? " (expired)": ""));
358 if (expired && IS_DOMAIN_ONLINE(find_our_domain())) {
359 DEBUG(10, ("revalidating expired entry\n"));
360 goto backend;
361 }
362 if (gid == -1) {
363 DEBUG(10, ("Returning negative cache entry\n"));
364 request_error(state);
365 return;
366 }
367 DEBUG(10, ("Returning positive cache entry\n"));
368 state->response.data.gid = gid;
369 request_ok(state);
370 return;
371 }
372
373 /* Validate the SID as a group. Hopefully this will hit cache.
374 Needed to prevent DoS by exhausting the uid allocation
375 range from random SIDs. */
376
377 backend:
378 winbindd_lookupsid_async( state->mem_ctx, &sid, sid2gid_lookupsid_recv,
379 state );
380}
381
382static void set_mapping_recv(void *private_data, bool success)
383{
384 struct winbindd_cli_state *state =
385 talloc_get_type_abort(private_data, struct winbindd_cli_state);
386
387 if (!success) {
388 DEBUG(5, ("Could not set sid mapping\n"));
389 request_error(state);
390 return;
391 }
392
393 request_ok(state);
394}
395
396void winbindd_set_mapping(struct winbindd_cli_state *state)
397{
398 struct id_map map;
399 DOM_SID sid;
400
401 DEBUG(3, ("[%5lu]: set id map\n", (unsigned long)state->pid));
402
403 if ( ! state->privileged) {
404 DEBUG(0, ("Only root is allowed to set mappings!\n"));
405 request_error(state);
406 return;
407 }
408
409 if (!string_to_sid(&sid, state->request.data.dual_idmapset.sid)) {
410 DEBUG(1, ("Could not get convert sid %s from string\n",
411 state->request.data.sid));
412 request_error(state);
413 return;
414 }
415
416 map.sid = &sid;
417 map.xid.id = state->request.data.dual_idmapset.id;
418 map.xid.type = state->request.data.dual_idmapset.type;
419
420 winbindd_set_mapping_async(state->mem_ctx, &map,
421 set_mapping_recv, state);
422}
423
424static void remove_mapping_recv(void *private_data, bool success)
425{
426 struct winbindd_cli_state *state =
427 talloc_get_type_abort(private_data, struct winbindd_cli_state);
428
429 if (!success) {
430 DEBUG(5, ("Could not remove sid mapping\n"));
431 request_error(state);
432 return;
433 }
434
435 request_ok(state);
436}
437
438void winbindd_remove_mapping(struct winbindd_cli_state *state)
439{
440 struct id_map map;
441 DOM_SID sid;
442
443 DEBUG(3, ("[%5lu]: remove id map\n", (unsigned long)state->pid));
444
445 if ( ! state->privileged) {
446 DEBUG(0, ("Only root is allowed to remove mappings!\n"));
447 request_error(state);
448 return;
449 }
450
451 if (!string_to_sid(&sid, state->request.data.dual_idmapset.sid)) {
452 DEBUG(1, ("Could not get convert sid %s from string\n",
453 state->request.data.sid));
454 request_error(state);
455 return;
456 }
457
458 map.sid = &sid;
459 map.xid.id = state->request.data.dual_idmapset.id;
460 map.xid.type = state->request.data.dual_idmapset.type;
461
462 winbindd_remove_mapping_async(state->mem_ctx, &map,
463 remove_mapping_recv, state);
464}
465
466static void set_hwm_recv(void *private_data, bool success)
467{
468 struct winbindd_cli_state *state =
469 talloc_get_type_abort(private_data, struct winbindd_cli_state);
470
471 if (!success) {
472 DEBUG(5, ("Could not set sid mapping\n"));
473 request_error(state);
474 return;
475 }
476
477 request_ok(state);
478}
479
480void winbindd_set_hwm(struct winbindd_cli_state *state)
481{
482 struct unixid xid;
483
484 DEBUG(3, ("[%5lu]: set hwm\n", (unsigned long)state->pid));
485
486 if ( ! state->privileged) {
487 DEBUG(0, ("Only root is allowed to set mappings!\n"));
488 request_error(state);
489 return;
490 }
491
492 xid.id = state->request.data.dual_idmapset.id;
493 xid.type = state->request.data.dual_idmapset.type;
494
495 winbindd_set_hwm_async(state->mem_ctx, &xid, set_hwm_recv, state);
496}
497
498/* Convert a uid to a sid */
499
500static void uid2sid_recv(void *private_data, bool success, const char *sidstr)
501{
502 struct winbindd_cli_state *state =
503 (struct winbindd_cli_state *)private_data;
504 struct dom_sid sid;
505
506 if (!success || !string_to_sid(&sid, sidstr)) {
507 ZERO_STRUCT(sid);
508 idmap_cache_set_sid2uid(&sid, state->request.data.uid);
509 request_error(state);
510 return;
511 }
512
513 DEBUG(10,("uid2sid: uid %lu has sid %s\n",
514 (unsigned long)(state->request.data.uid), sidstr));
515
516 idmap_cache_set_sid2uid(&sid, state->request.data.uid);
517 fstrcpy(state->response.data.sid.sid, sidstr);
518 state->response.data.sid.type = SID_NAME_USER;
519 request_ok(state);
520 return;
521}
522
523void winbindd_uid_to_sid(struct winbindd_cli_state *state)
524{
525 struct dom_sid sid;
526 bool expired;
527
528 DEBUG(3, ("[%5lu]: uid to sid %lu\n", (unsigned long)state->pid,
529 (unsigned long)state->request.data.uid));
530
531 if (idmap_cache_find_uid2sid(state->request.data.uid, &sid,
532 &expired)) {
533 DEBUG(10, ("idmap_cache_find_uid2sid found %d%s\n",
534 (int)state->request.data.uid,
535 expired ? " (expired)": ""));
536 if (expired && IS_DOMAIN_ONLINE(find_our_domain())) {
537 DEBUG(10, ("revalidating expired entry\n"));
538 goto backend;
539 }
540 if (is_null_sid(&sid)) {
541 DEBUG(10, ("Returning negative cache entry\n"));
542 request_error(state);
543 return;
544 }
545 DEBUG(10, ("Returning positive cache entry\n"));
546 sid_to_fstring(state->response.data.sid.sid, &sid);
547 request_ok(state);
548 return;
549 }
550
551 /* always go via the async interface (may block) */
552 backend:
553 winbindd_uid2sid_async(state->mem_ctx, state->request.data.uid, uid2sid_recv, state);
554}
555
556/* Convert a gid to a sid */
557
558static void gid2sid_recv(void *private_data, bool success, const char *sidstr)
559{
560 struct winbindd_cli_state *state =
561 (struct winbindd_cli_state *)private_data;
562 struct dom_sid sid;
563
564 if (!success || !string_to_sid(&sid, sidstr)) {
565 ZERO_STRUCT(sid);
566 idmap_cache_set_sid2gid(&sid, state->request.data.gid);
567 request_error(state);
568 return;
569 }
570 DEBUG(10,("gid2sid: gid %lu has sid %s\n",
571 (unsigned long)(state->request.data.gid), sidstr));
572
573 idmap_cache_set_sid2gid(&sid, state->request.data.gid);
574 fstrcpy(state->response.data.sid.sid, sidstr);
575 state->response.data.sid.type = SID_NAME_DOM_GRP;
576 request_ok(state);
577 return;
578}
579
580
581void winbindd_gid_to_sid(struct winbindd_cli_state *state)
582{
583 struct dom_sid sid;
584 bool expired;
585
586 DEBUG(3, ("[%5lu]: gid to sid %lu\n", (unsigned long)state->pid,
587 (unsigned long)state->request.data.gid));
588
589 if (idmap_cache_find_gid2sid(state->request.data.gid, &sid,
590 &expired)) {
591 DEBUG(10, ("idmap_cache_find_gid2sid found %d%s\n",
592 (int)state->request.data.gid,
593 expired ? " (expired)": ""));
594 if (expired && IS_DOMAIN_ONLINE(find_our_domain())) {
595 DEBUG(10, ("revalidating expired entry\n"));
596 goto backend;
597 }
598 if (is_null_sid(&sid)) {
599 DEBUG(10, ("Returning negative cache entry\n"));
600 request_error(state);
601 return;
602 }
603 DEBUG(10, ("Returning positive cache entry\n"));
604 sid_to_fstring(state->response.data.sid.sid, &sid);
605 request_ok(state);
606 return;
607 }
608
609 /* always use async calls (may block) */
610 backend:
611 winbindd_gid2sid_async(state->mem_ctx, state->request.data.gid, gid2sid_recv, state);
612}
613
614void winbindd_allocate_uid(struct winbindd_cli_state *state)
615{
616 if ( !state->privileged ) {
617 DEBUG(2, ("winbindd_allocate_uid: non-privileged access "
618 "denied!\n"));
619 request_error(state);
620 return;
621 }
622
623 sendto_child(state, idmap_child());
624}
625
626enum winbindd_result winbindd_dual_allocate_uid(struct winbindd_domain *domain,
627 struct winbindd_cli_state *state)
628{
629 struct unixid xid;
630
631 if (!NT_STATUS_IS_OK(idmap_allocate_uid(&xid))) {
632 return WINBINDD_ERROR;
633 }
634 state->response.data.uid = xid.id;
635 return WINBINDD_OK;
636}
637
638void winbindd_allocate_gid(struct winbindd_cli_state *state)
639{
640 if ( !state->privileged ) {
641 DEBUG(2, ("winbindd_allocate_gid: non-privileged access "
642 "denied!\n"));
643 request_error(state);
644 return;
645 }
646
647 sendto_child(state, idmap_child());
648}
649
650enum winbindd_result winbindd_dual_allocate_gid(struct winbindd_domain *domain,
651 struct winbindd_cli_state *state)
652{
653 struct unixid xid;
654
655 if (!NT_STATUS_IS_OK(idmap_allocate_gid(&xid))) {
656 return WINBINDD_ERROR;
657 }
658 state->response.data.gid = xid.id;
659 return WINBINDD_OK;
660}
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