source: trunk/samba-3.0.25pre1/source/groupdb/mapping.c@ 7

Last change on this file since 7 was 1, checked in by Paul Smedley, 18 years ago

Initial code import
File size: 17.9 KB
Line 
1/*
2 * Unix SMB/CIFS implementation.
3 * RPC Pipe client / server routines
4 * Copyright (C) Andrew Tridgell 1992-2000,
5 * Copyright (C) Jean François Micouleau 1998-2001.
6 * Copyright (C) Volker Lendecke 2006.
7 * Copyright (C) Gerald Carter 2006.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24#include "includes.h"
25#include "groupdb/mapping.h"
26
27/****************************************************************************
28initialise first time the mapping list
29****************************************************************************/
30NTSTATUS add_initial_entry(gid_t gid, const char *sid, enum lsa_SidType sid_name_use, const char *nt_name, const char *comment)
31{
32 GROUP_MAP map;
33
34 if(!init_group_mapping()) {
35 DEBUG(0,("failed to initialize group mapping\n"));
36 return NT_STATUS_UNSUCCESSFUL;
37 }
38
39 map.gid=gid;
40 if (!string_to_sid(&map.sid, sid)) {
41 DEBUG(0, ("string_to_sid failed: %s", sid));
42 return NT_STATUS_UNSUCCESSFUL;
43 }
44
45 map.sid_name_use=sid_name_use;
46 fstrcpy(map.nt_name, nt_name);
47 fstrcpy(map.comment, comment);
48
49 return pdb_add_group_mapping_entry(&map);
50}
51
52/****************************************************************************
53 Map a unix group to a newly created mapping
54****************************************************************************/
55NTSTATUS map_unix_group(const struct group *grp, GROUP_MAP *pmap)
56{
57 NTSTATUS status;
58 GROUP_MAP map;
59 const char *grpname, *dom, *name;
60 uint32 rid;
61
62 if (pdb_getgrgid(&map, grp->gr_gid)) {
63 return NT_STATUS_GROUP_EXISTS;
64 }
65
66 map.gid = grp->gr_gid;
67 grpname = grp->gr_name;
68
69 if (lookup_name(tmp_talloc_ctx(), grpname, LOOKUP_NAME_ISOLATED,
70 &dom, &name, NULL, NULL)) {
71
72 const char *tmp = talloc_asprintf(
73 tmp_talloc_ctx(), "Unix Group %s", grp->gr_name);
74
75 DEBUG(5, ("%s exists as %s\\%s, retrying as \"%s\"\n",
76 grpname, dom, name, tmp));
77 grpname = tmp;
78 }
79
80 if (lookup_name(tmp_talloc_ctx(), grpname, LOOKUP_NAME_ISOLATED,
81 NULL, NULL, NULL, NULL)) {
82 DEBUG(3, ("\"%s\" exists, can't map it\n", grp->gr_name));
83 return NT_STATUS_GROUP_EXISTS;
84 }
85
86 fstrcpy(map.nt_name, grpname);
87
88 if (pdb_rid_algorithm()) {
89 rid = algorithmic_pdb_gid_to_group_rid( grp->gr_gid );
90 } else {
91 if (!pdb_new_rid(&rid)) {
92 DEBUG(3, ("Could not get a new RID for %s\n",
93 grp->gr_name));
94 return NT_STATUS_ACCESS_DENIED;
95 }
96 }
97
98 sid_compose(&map.sid, get_global_sam_sid(), rid);
99 map.sid_name_use = SID_NAME_DOM_GRP;
100 fstrcpy(map.comment, talloc_asprintf(tmp_talloc_ctx(), "Unix Group %s",
101 grp->gr_name));
102
103 status = pdb_add_group_mapping_entry(&map);
104 if (NT_STATUS_IS_OK(status)) {
105 *pmap = map;
106 }
107 return status;
108}
109
110
111
112
113
114
115
116static NTSTATUS alias_memberships(const DOM_SID *members, size_t num_members,
117 DOM_SID **sids, size_t *num)
118{
119 size_t i;
120
121 *num = 0;
122 *sids = NULL;
123
124 for (i=0; i<num_members; i++) {
125 NTSTATUS status = one_alias_membership(&members[i], sids, num);
126 if (!NT_STATUS_IS_OK(status))
127 return status;
128 }
129 return NT_STATUS_OK;
130}
131
132struct aliasmem_closure {
133 const DOM_SID *alias;
134 DOM_SID **sids;
135 size_t *num;
136};
137
138
139
140/*
141 *
142 * High level functions
143 * better to use them than the lower ones.
144 *
145 * we are checking if the group is in the mapping file
146 * and if the group is an existing unix group
147 *
148 */
149
150/* get a domain group from it's SID */
151
152BOOL get_domain_group_from_sid(DOM_SID sid, GROUP_MAP *map)
153{
154 struct group *grp;
155 BOOL ret;
156
157 if(!init_group_mapping()) {
158 DEBUG(0,("failed to initialize group mapping\n"));
159 return(False);
160 }
161
162 DEBUG(10, ("get_domain_group_from_sid\n"));
163
164 /* if the group is NOT in the database, it CAN NOT be a domain group */
165
166 become_root();
167 ret = pdb_getgrsid(map, sid);
168 unbecome_root();
169
170 /* special case check for rid 513 */
171
172 if ( !ret ) {
173 uint32 rid;
174
175 sid_peek_rid( &sid, &rid );
176
177 if ( rid == DOMAIN_GROUP_RID_USERS ) {
178 fstrcpy( map->nt_name, "None" );
179 fstrcpy( map->comment, "Ordinary Users" );
180 sid_copy( &map->sid, &sid );
181 map->sid_name_use = SID_NAME_DOM_GRP;
182
183 return True;
184 }
185
186 return False;
187 }
188
189 DEBUG(10, ("get_domain_group_from_sid: SID found in the TDB\n"));
190
191 /* if it's not a domain group, continue */
192 if (map->sid_name_use!=SID_NAME_DOM_GRP) {
193 return False;
194 }
195
196 DEBUG(10, ("get_domain_group_from_sid: SID is a domain group\n"));
197
198 if (map->gid==-1) {
199 return False;
200 }
201
202 DEBUG(10, ("get_domain_group_from_sid: SID is mapped to gid:%lu\n",(unsigned long)map->gid));
203
204 grp = getgrgid(map->gid);
205 if ( !grp ) {
206 DEBUG(10, ("get_domain_group_from_sid: gid DOESN'T exist in UNIX security\n"));
207 return False;
208 }
209
210 DEBUG(10, ("get_domain_group_from_sid: gid exists in UNIX security\n"));
211
212 return True;
213}
214
215/****************************************************************************
216 Create a UNIX group on demand.
217****************************************************************************/
218
219int smb_create_group(const char *unix_group, gid_t *new_gid)
220{
221 pstring add_script;
222 int ret = -1;
223 int fd = 0;
224
225 *new_gid = 0;
226
227 /* defer to scripts */
228
229 if ( *lp_addgroup_script() ) {
230 pstrcpy(add_script, lp_addgroup_script());
231 pstring_sub(add_script, "%g", unix_group);
232 ret = smbrun(add_script, &fd);
233 DEBUG(ret ? 0 : 3,("smb_create_group: Running the command `%s' gave %d\n",add_script,ret));
234 if (ret == 0) {
235 smb_nscd_flush_group_cache();
236 }
237 if (ret != 0)
238 return ret;
239
240 if (fd != 0) {
241 fstring output;
242
243 *new_gid = 0;
244 if (read(fd, output, sizeof(output)) > 0) {
245 *new_gid = (gid_t)strtoul(output, NULL, 10);
246 }
247
248 close(fd);
249 }
250
251 }
252
253 if (*new_gid == 0) {
254 struct group *grp = getgrnam(unix_group);
255
256 if (grp != NULL)
257 *new_gid = grp->gr_gid;
258 }
259
260 return ret;
261}
262
263/****************************************************************************
264 Delete a UNIX group on demand.
265****************************************************************************/
266
267int smb_delete_group(const char *unix_group)
268{
269 pstring del_script;
270 int ret;
271
272 /* defer to scripts */
273
274 if ( *lp_delgroup_script() ) {
275 pstrcpy(del_script, lp_delgroup_script());
276 pstring_sub(del_script, "%g", unix_group);
277 ret = smbrun(del_script,NULL);
278 DEBUG(ret ? 0 : 3,("smb_delete_group: Running the command `%s' gave %d\n",del_script,ret));
279 if (ret == 0) {
280 smb_nscd_flush_group_cache();
281 }
282 return ret;
283 }
284
285 return -1;
286}
287
288/****************************************************************************
289 Set a user's primary UNIX group.
290****************************************************************************/
291int smb_set_primary_group(const char *unix_group, const char* unix_user)
292{
293 pstring add_script;
294 int ret;
295
296 /* defer to scripts */
297
298 if ( *lp_setprimarygroup_script() ) {
299 pstrcpy(add_script, lp_setprimarygroup_script());
300 all_string_sub(add_script, "%g", unix_group, sizeof(add_script));
301 all_string_sub(add_script, "%u", unix_user, sizeof(add_script));
302 ret = smbrun(add_script,NULL);
303 flush_pwnam_cache();
304 DEBUG(ret ? 0 : 3,("smb_set_primary_group: "
305 "Running the command `%s' gave %d\n",add_script,ret));
306 if (ret == 0) {
307 smb_nscd_flush_group_cache();
308 }
309 return ret;
310 }
311
312 return -1;
313}
314
315/****************************************************************************
316 Add a user to a UNIX group.
317****************************************************************************/
318
319int smb_add_user_group(const char *unix_group, const char *unix_user)
320{
321 pstring add_script;
322 int ret;
323
324 /* defer to scripts */
325
326 if ( *lp_addusertogroup_script() ) {
327 pstrcpy(add_script, lp_addusertogroup_script());
328 pstring_sub(add_script, "%g", unix_group);
329 pstring_sub(add_script, "%u", unix_user);
330 ret = smbrun(add_script,NULL);
331 DEBUG(ret ? 0 : 3,("smb_add_user_group: Running the command `%s' gave %d\n",add_script,ret));
332 if (ret == 0) {
333 smb_nscd_flush_group_cache();
334 }
335 return ret;
336 }
337
338 return -1;
339}
340
341/****************************************************************************
342 Delete a user from a UNIX group
343****************************************************************************/
344
345int smb_delete_user_group(const char *unix_group, const char *unix_user)
346{
347 pstring del_script;
348 int ret;
349
350 /* defer to scripts */
351
352 if ( *lp_deluserfromgroup_script() ) {
353 pstrcpy(del_script, lp_deluserfromgroup_script());
354 pstring_sub(del_script, "%g", unix_group);
355 pstring_sub(del_script, "%u", unix_user);
356 ret = smbrun(del_script,NULL);
357 DEBUG(ret ? 0 : 3,("smb_delete_user_group: Running the command `%s' gave %d\n",del_script,ret));
358 if (ret == 0) {
359 smb_nscd_flush_group_cache();
360 }
361 return ret;
362 }
363
364 return -1;
365}
366
367
368NTSTATUS pdb_default_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
369 DOM_SID sid)
370{
371 return get_group_map_from_sid(sid, map) ?
372 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
373}
374
375NTSTATUS pdb_default_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
376 gid_t gid)
377{
378 return get_group_map_from_gid(gid, map) ?
379 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
380}
381
382NTSTATUS pdb_default_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
383 const char *name)
384{
385 return get_group_map_from_ntname(name, map) ?
386 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
387}
388
389NTSTATUS pdb_default_add_group_mapping_entry(struct pdb_methods *methods,
390 GROUP_MAP *map)
391{
392 return add_mapping_entry(map, TDB_INSERT) ?
393 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
394}
395
396NTSTATUS pdb_default_update_group_mapping_entry(struct pdb_methods *methods,
397 GROUP_MAP *map)
398{
399 return add_mapping_entry(map, TDB_REPLACE) ?
400 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
401}
402
403NTSTATUS pdb_default_delete_group_mapping_entry(struct pdb_methods *methods,
404 DOM_SID sid)
405{
406 return group_map_remove(&sid) ?
407 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
408}
409
410NTSTATUS pdb_default_enum_group_mapping(struct pdb_methods *methods,
411 const DOM_SID *sid, enum lsa_SidType sid_name_use,
412 GROUP_MAP **pp_rmap, size_t *p_num_entries,
413 BOOL unix_only)
414{
415 return enum_group_mapping(sid, sid_name_use, pp_rmap, p_num_entries, unix_only) ?
416 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
417}
418
419NTSTATUS pdb_default_find_alias(struct pdb_methods *methods,
420 const char *name, DOM_SID *sid)
421{
422 GROUP_MAP map;
423
424 if (!pdb_getgrnam(&map, name))
425 return NT_STATUS_NO_SUCH_ALIAS;
426
427 if ((map.sid_name_use != SID_NAME_WKN_GRP) &&
428 (map.sid_name_use != SID_NAME_ALIAS))
429 return NT_STATUS_OBJECT_TYPE_MISMATCH;
430
431 sid_copy(sid, &map.sid);
432 return NT_STATUS_OK;
433}
434
435NTSTATUS pdb_default_create_alias(struct pdb_methods *methods,
436 const char *name, uint32 *rid)
437{
438 DOM_SID sid;
439 enum lsa_SidType type;
440 uint32 new_rid;
441 gid_t gid;
442 BOOL exists;
443 GROUP_MAP map;
444 TALLOC_CTX *mem_ctx;
445 NTSTATUS status;
446
447 DEBUG(10, ("Trying to create alias %s\n", name));
448
449 mem_ctx = talloc_new(NULL);
450 if (mem_ctx == NULL) {
451 return NT_STATUS_NO_MEMORY;
452 }
453
454 exists = lookup_name(mem_ctx, name, LOOKUP_NAME_ISOLATED,
455 NULL, NULL, &sid, &type);
456 TALLOC_FREE(mem_ctx);
457
458 if (exists) {
459 return NT_STATUS_ALIAS_EXISTS;
460 }
461
462 if (!winbind_allocate_gid(&gid)) {
463 DEBUG(3, ("Could not get a gid out of winbind\n"));
464 return NT_STATUS_ACCESS_DENIED;
465 }
466
467 if (!pdb_new_rid(&new_rid)) {
468 DEBUG(0, ("Could not allocate a RID -- wasted a gid :-(\n"));
469 return NT_STATUS_ACCESS_DENIED;
470 }
471
472 DEBUG(10, ("Creating alias %s with gid %d and rid %d\n",
473 name, gid, new_rid));
474
475 sid_copy(&sid, get_global_sam_sid());
476 sid_append_rid(&sid, new_rid);
477
478 map.gid = gid;
479 sid_copy(&map.sid, &sid);
480 map.sid_name_use = SID_NAME_ALIAS;
481 fstrcpy(map.nt_name, name);
482 fstrcpy(map.comment, "");
483
484 status = pdb_add_group_mapping_entry(&map);
485
486 if (!NT_STATUS_IS_OK(status)) {
487 DEBUG(0, ("Could not add group mapping entry for alias %s "
488 "(%s)\n", name, nt_errstr(status)));
489 return status;
490 }
491
492 *rid = new_rid;
493
494 return NT_STATUS_OK;
495}
496
497NTSTATUS pdb_default_delete_alias(struct pdb_methods *methods,
498 const DOM_SID *sid)
499{
500 return pdb_delete_group_mapping_entry(*sid);
501}
502
503NTSTATUS pdb_default_get_aliasinfo(struct pdb_methods *methods,
504 const DOM_SID *sid,
505 struct acct_info *info)
506{
507 GROUP_MAP map;
508
509 if (!pdb_getgrsid(&map, *sid))
510 return NT_STATUS_NO_SUCH_ALIAS;
511
512 if ((map.sid_name_use != SID_NAME_ALIAS) &&
513 (map.sid_name_use != SID_NAME_WKN_GRP)) {
514 DEBUG(2, ("%s is a %s, expected an alias\n",
515 sid_string_static(sid),
516 sid_type_lookup(map.sid_name_use)));
517 return NT_STATUS_NO_SUCH_ALIAS;
518 }
519
520 fstrcpy(info->acct_name, map.nt_name);
521 fstrcpy(info->acct_desc, map.comment);
522 sid_peek_rid(&map.sid, &info->rid);
523 return NT_STATUS_OK;
524}
525
526NTSTATUS pdb_default_set_aliasinfo(struct pdb_methods *methods,
527 const DOM_SID *sid,
528 struct acct_info *info)
529{
530 GROUP_MAP map;
531
532 if (!pdb_getgrsid(&map, *sid))
533 return NT_STATUS_NO_SUCH_ALIAS;
534
535 fstrcpy(map.nt_name, info->acct_name);
536 fstrcpy(map.comment, info->acct_desc);
537
538 return pdb_update_group_mapping_entry(&map);
539}
540
541NTSTATUS pdb_default_add_aliasmem(struct pdb_methods *methods,
542 const DOM_SID *alias, const DOM_SID *member)
543{
544 return add_aliasmem(alias, member);
545}
546
547NTSTATUS pdb_default_del_aliasmem(struct pdb_methods *methods,
548 const DOM_SID *alias, const DOM_SID *member)
549{
550 return del_aliasmem(alias, member);
551}
552
553NTSTATUS pdb_default_enum_aliasmem(struct pdb_methods *methods,
554 const DOM_SID *alias, DOM_SID **pp_members,
555 size_t *p_num_members)
556{
557 return enum_aliasmem(alias, pp_members, p_num_members);
558}
559
560NTSTATUS pdb_default_alias_memberships(struct pdb_methods *methods,
561 TALLOC_CTX *mem_ctx,
562 const DOM_SID *domain_sid,
563 const DOM_SID *members,
564 size_t num_members,
565 uint32 **pp_alias_rids,
566 size_t *p_num_alias_rids)
567{
568 DOM_SID *alias_sids;
569 size_t i, num_alias_sids;
570 NTSTATUS result;
571
572 alias_sids = NULL;
573 num_alias_sids = 0;
574
575 result = alias_memberships(members, num_members,
576 &alias_sids, &num_alias_sids);
577
578 if (!NT_STATUS_IS_OK(result))
579 return result;
580
581 *pp_alias_rids = TALLOC_ARRAY(mem_ctx, uint32, num_alias_sids);
582 if (*pp_alias_rids == NULL)
583 return NT_STATUS_NO_MEMORY;
584
585 *p_num_alias_rids = 0;
586
587 for (i=0; i<num_alias_sids; i++) {
588 if (!sid_peek_check_rid(domain_sid, &alias_sids[i],
589 &(*pp_alias_rids)[*p_num_alias_rids]))
590 continue;
591 *p_num_alias_rids += 1;
592 }
593
594 TALLOC_FREE(alias_sids);
595
596 return NT_STATUS_OK;
597}
598
599/**********************************************************************
600 no ops for passdb backends that don't implement group mapping
601 *********************************************************************/
602
603NTSTATUS pdb_nop_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
604 DOM_SID sid)
605{
606 return NT_STATUS_UNSUCCESSFUL;
607}
608
609NTSTATUS pdb_nop_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
610 gid_t gid)
611{
612 return NT_STATUS_UNSUCCESSFUL;
613}
614
615NTSTATUS pdb_nop_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
616 const char *name)
617{
618 return NT_STATUS_UNSUCCESSFUL;
619}
620
621NTSTATUS pdb_nop_add_group_mapping_entry(struct pdb_methods *methods,
622 GROUP_MAP *map)
623{
624 return NT_STATUS_UNSUCCESSFUL;
625}
626
627NTSTATUS pdb_nop_update_group_mapping_entry(struct pdb_methods *methods,
628 GROUP_MAP *map)
629{
630 return NT_STATUS_UNSUCCESSFUL;
631}
632
633NTSTATUS pdb_nop_delete_group_mapping_entry(struct pdb_methods *methods,
634 DOM_SID sid)
635{
636 return NT_STATUS_UNSUCCESSFUL;
637}
638
639NTSTATUS pdb_nop_enum_group_mapping(struct pdb_methods *methods,
640 enum lsa_SidType sid_name_use,
641 GROUP_MAP **rmap, size_t *num_entries,
642 BOOL unix_only)
643{
644 return NT_STATUS_UNSUCCESSFUL;
645}
646
647/****************************************************************************
648 These need to be redirected through pdb_interface.c
649****************************************************************************/
650BOOL pdb_get_dom_grp_info(const DOM_SID *sid, struct acct_info *info)
651{
652 GROUP_MAP map;
653 BOOL res;
654
655 become_root();
656 res = get_domain_group_from_sid(*sid, &map);
657 unbecome_root();
658
659 if (!res)
660 return False;
661
662 fstrcpy(info->acct_name, map.nt_name);
663 fstrcpy(info->acct_desc, map.comment);
664 sid_peek_rid(sid, &info->rid);
665 return True;
666}
667
668BOOL pdb_set_dom_grp_info(const DOM_SID *sid, const struct acct_info *info)
669{
670 GROUP_MAP map;
671
672 if (!get_domain_group_from_sid(*sid, &map))
673 return False;
674
675 fstrcpy(map.nt_name, info->acct_name);
676 fstrcpy(map.comment, info->acct_desc);
677
678 return NT_STATUS_IS_OK(pdb_update_group_mapping_entry(&map));
679}
680
681/********************************************************************
682 Really just intended to be called by smbd
683********************************************************************/
684
685NTSTATUS pdb_create_builtin_alias(uint32 rid)
686{
687 DOM_SID sid;
688 enum lsa_SidType type;
689 gid_t gid;
690 GROUP_MAP map;
691 TALLOC_CTX *mem_ctx;
692 NTSTATUS status;
693 const char *name = NULL;
694 fstring groupname;
695
696 DEBUG(10, ("Trying to create builtin alias %d\n", rid));
697
698 if ( !sid_compose( &sid, &global_sid_Builtin, rid ) ) {
699 return NT_STATUS_NO_SUCH_ALIAS;
700 }
701
702 if ( (mem_ctx = talloc_new(NULL)) == NULL ) {
703 return NT_STATUS_NO_MEMORY;
704 }
705
706 if ( !lookup_sid(mem_ctx, &sid, NULL, &name, &type) ) {
707 TALLOC_FREE( mem_ctx );
708 return NT_STATUS_NO_SUCH_ALIAS;
709 }
710
711 /* validate RID so copy the name and move on */
712
713 fstrcpy( groupname, name );
714 TALLOC_FREE( mem_ctx );
715
716 if (!winbind_allocate_gid(&gid)) {
717 DEBUG(3, ("pdb_create_builtin_alias: Could not get a gid out of winbind\n"));
718 return NT_STATUS_ACCESS_DENIED;
719 }
720
721 DEBUG(10,("Creating alias %s with gid %d\n", name, gid));
722
723 map.gid = gid;
724 sid_copy(&map.sid, &sid);
725 map.sid_name_use = SID_NAME_ALIAS;
726 fstrcpy(map.nt_name, name);
727 fstrcpy(map.comment, "");
728
729 status = pdb_add_group_mapping_entry(&map);
730
731 if (!NT_STATUS_IS_OK(status)) {
732 DEBUG(0, ("pdb_create_builtin_alias: Could not add group mapping entry for alias %d "
733 "(%s)\n", rid, nt_errstr(status)));
734 }
735
736 return status;
737}
738
739
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