Pass a talloc_ctx to pdb_enum_aliasmem
[ira/wip.git] / source3 / passdb / pdb_interface.c
1 /* 
2    Unix SMB/CIFS implementation.
3    Password and authentication handling
4    Copyright (C) Andrew Bartlett                        2002
5    Copyright (C) Jelmer Vernooij                        2002
6    Copyright (C) Simo Sorce                             2003
7    Copyright (C) Volker Lendecke                        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 3 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, see <http://www.gnu.org/licenses/>.
21 */
22
23 #include "includes.h"
24
25 #undef DBGC_CLASS
26 #define DBGC_CLASS DBGC_PASSDB
27
28 static_decl_pdb;
29
30 static struct pdb_init_function_entry *backends = NULL;
31
32 static void lazy_initialize_passdb(void)
33 {
34         static bool initialized = False;
35         if(initialized) {
36                 return;
37         }
38         static_init_pdb;
39         initialized = True;
40 }
41
42 static bool lookup_global_sam_rid(TALLOC_CTX *mem_ctx, uint32 rid,
43                                   const char **name,
44                                   enum lsa_SidType *psid_name_use,
45                                   union unid_t *unix_id);
46
47 NTSTATUS smb_register_passdb(int version, const char *name, pdb_init_function init) 
48 {
49         struct pdb_init_function_entry *entry = backends;
50
51         if(version != PASSDB_INTERFACE_VERSION) {
52                 DEBUG(0,("Can't register passdb backend!\n"
53                          "You tried to register a passdb module with PASSDB_INTERFACE_VERSION %d, "
54                          "while this version of samba uses version %d\n", 
55                          version,PASSDB_INTERFACE_VERSION));
56                 return NT_STATUS_OBJECT_TYPE_MISMATCH;
57         }
58
59         if (!name || !init) {
60                 return NT_STATUS_INVALID_PARAMETER;
61         }
62
63         DEBUG(5,("Attempting to register passdb backend %s\n", name));
64
65         /* Check for duplicates */
66         if (pdb_find_backend_entry(name)) {
67                 DEBUG(0,("There already is a passdb backend registered with the name %s!\n", name));
68                 return NT_STATUS_OBJECT_NAME_COLLISION;
69         }
70
71         entry = SMB_XMALLOC_P(struct pdb_init_function_entry);
72         entry->name = smb_xstrdup(name);
73         entry->init = init;
74
75         DLIST_ADD(backends, entry);
76         DEBUG(5,("Successfully added passdb backend '%s'\n", name));
77         return NT_STATUS_OK;
78 }
79
80 struct pdb_init_function_entry *pdb_find_backend_entry(const char *name)
81 {
82         struct pdb_init_function_entry *entry = backends;
83
84         while(entry) {
85                 if (strcmp(entry->name, name)==0) return entry;
86                 entry = entry->next;
87         }
88
89         return NULL;
90 }
91
92 /*
93  * The event context for the passdb backend. I know this is a bad hack and yet
94  * another static variable, but our pdb API is a global thing per
95  * definition. The first use for this is the LDAP idle function, more might be
96  * added later.
97  *
98  * I don't feel too bad about this static variable, it replaces the
99  * smb_idle_event_list that used to exist in lib/module.c.  -- VL
100  */
101
102 static struct event_context *pdb_event_ctx;
103
104 struct event_context *pdb_get_event_context(void)
105 {
106         return pdb_event_ctx;
107 }
108
109 /******************************************************************
110   Make a pdb_methods from scratch
111  *******************************************************************/
112
113 NTSTATUS make_pdb_method_name(struct pdb_methods **methods, const char *selected)
114 {
115         char *module_name = smb_xstrdup(selected);
116         char *module_location = NULL, *p;
117         struct pdb_init_function_entry *entry;
118         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
119
120         lazy_initialize_passdb();
121
122         p = strchr(module_name, ':');
123
124         if (p) {
125                 *p = 0;
126                 module_location = p+1;
127                 trim_char(module_location, ' ', ' ');
128         }
129
130         trim_char(module_name, ' ', ' ');
131
132
133         DEBUG(5,("Attempting to find a passdb backend to match %s (%s)\n", selected, module_name));
134
135         entry = pdb_find_backend_entry(module_name);
136         
137         /* Try to find a module that contains this module */
138         if (!entry) { 
139                 DEBUG(2,("No builtin backend found, trying to load plugin\n"));
140                 if(NT_STATUS_IS_OK(smb_probe_module("pdb", module_name)) && !(entry = pdb_find_backend_entry(module_name))) {
141                         DEBUG(0,("Plugin is available, but doesn't register passdb backend %s\n", module_name));
142                         SAFE_FREE(module_name);
143                         return NT_STATUS_UNSUCCESSFUL;
144                 }
145         }
146         
147         /* No such backend found */
148         if(!entry) { 
149                 DEBUG(0,("No builtin nor plugin backend for %s found\n", module_name));
150                 SAFE_FREE(module_name);
151                 return NT_STATUS_INVALID_PARAMETER;
152         }
153
154         DEBUG(5,("Found pdb backend %s\n", module_name));
155
156         if ( !NT_STATUS_IS_OK( nt_status = entry->init(methods, module_location) ) ) {
157                 DEBUG(0,("pdb backend %s did not correctly init (error was %s)\n", 
158                         selected, nt_errstr(nt_status)));
159                 SAFE_FREE(module_name);
160                 return nt_status;
161         }
162
163         SAFE_FREE(module_name);
164
165         DEBUG(5,("pdb backend %s has a valid init\n", selected));
166
167         return nt_status;
168 }
169
170 /******************************************************************
171  Return an already initialized pdb_methods structure
172 *******************************************************************/
173
174 static struct pdb_methods *pdb_get_methods_reload( bool reload ) 
175 {
176         static struct pdb_methods *pdb = NULL;
177
178         if ( pdb && reload ) {
179                 pdb->free_private_data( &(pdb->private_data) );
180                 if ( !NT_STATUS_IS_OK( make_pdb_method_name( &pdb, lp_passdb_backend() ) ) ) {
181                         char *msg = NULL;
182                         if (asprintf(&msg, "pdb_get_methods_reload: "
183                                         "failed to get pdb methods for backend %s\n",
184                                         lp_passdb_backend()) > 0) {
185                                 smb_panic(msg);
186                         } else {
187                                 smb_panic("pdb_get_methods_reload");
188                         }
189                 }
190         }
191
192         if ( !pdb ) {
193                 if ( !NT_STATUS_IS_OK( make_pdb_method_name( &pdb, lp_passdb_backend() ) ) ) {
194                         char *msg = NULL;
195                         if (asprintf(&msg, "pdb_get_methods_reload: "
196                                         "failed to get pdb methods for backend %s\n",
197                                         lp_passdb_backend()) > 0) {
198                                 smb_panic(msg);
199                         } else {
200                                 smb_panic("pdb_get_methods_reload");
201                         }
202                 }
203         }
204
205         return pdb;
206 }
207
208 static struct pdb_methods *pdb_get_methods(void)
209 {
210         return pdb_get_methods_reload(False);
211 }
212
213 bool pdb_getsampwnam(struct samu *sam_acct, const char *username) 
214 {
215         struct pdb_methods *pdb = pdb_get_methods();
216         struct samu *for_cache;
217         const struct dom_sid *user_sid;
218
219         if (!NT_STATUS_IS_OK(pdb->getsampwnam(pdb, sam_acct, username))) {
220                 return False;
221         }
222
223         for_cache = samu_new(NULL);
224         if (for_cache == NULL) {
225                 return False;
226         }
227
228         if (!pdb_copy_sam_account(for_cache, sam_acct)) {
229                 TALLOC_FREE(for_cache);
230                 return False;
231         }
232
233         user_sid = pdb_get_user_sid(for_cache);
234
235         memcache_add_talloc(NULL, PDB_GETPWSID_CACHE,
236                             data_blob_const(user_sid, sizeof(*user_sid)),
237                             &for_cache);
238
239         return True;
240 }
241
242 /**********************************************************************
243 **********************************************************************/
244
245 bool guest_user_info( struct samu *user )
246 {
247         struct passwd *pwd;
248         NTSTATUS result;
249         const char *guestname = lp_guestaccount();
250         
251         if ( !(pwd = getpwnam_alloc(talloc_autofree_context(), guestname ) ) ) {
252                 DEBUG(0,("guest_user_info: Unable to locate guest account [%s]!\n", 
253                         guestname));
254                 return False;
255         }
256         
257         result = samu_set_unix(user, pwd );
258
259         TALLOC_FREE( pwd );
260
261         return NT_STATUS_IS_OK( result );
262 }
263
264 /**********************************************************************
265 **********************************************************************/
266
267 bool pdb_getsampwsid(struct samu *sam_acct, const DOM_SID *sid) 
268 {
269         struct pdb_methods *pdb = pdb_get_methods();
270         uint32 rid;
271         void *cache_data;
272
273         /* hard code the Guest RID of 501 */
274
275         if ( !sid_peek_check_rid( get_global_sam_sid(), sid, &rid ) )
276                 return False;
277
278         if ( rid == DOMAIN_USER_RID_GUEST ) {
279                 DEBUG(6,("pdb_getsampwsid: Building guest account\n"));
280                 return guest_user_info( sam_acct );
281         }
282         
283         /* check the cache first */
284
285         cache_data = memcache_lookup_talloc(
286                 NULL, PDB_GETPWSID_CACHE, data_blob_const(sid, sizeof(*sid)));
287
288         if (cache_data != NULL) {
289                 struct samu *cache_copy = talloc_get_type_abort(
290                         cache_data, struct samu);
291
292                 return pdb_copy_sam_account(sam_acct, cache_copy);
293         }
294
295         return NT_STATUS_IS_OK(pdb->getsampwsid(pdb, sam_acct, sid));
296 }
297
298 static NTSTATUS pdb_default_create_user(struct pdb_methods *methods,
299                                         TALLOC_CTX *tmp_ctx, const char *name,
300                                         uint32 acb_info, uint32 *rid)
301 {
302         struct samu *sam_pass;
303         NTSTATUS status;
304         struct passwd *pwd;
305
306         if ((sam_pass = samu_new(tmp_ctx)) == NULL) {
307                 return NT_STATUS_NO_MEMORY;
308         }
309
310         if ( !(pwd = Get_Pwnam_alloc(tmp_ctx, name)) ) {
311                 char *add_script = NULL;
312                 int add_ret;
313                 fstring name2;
314
315                 if ((acb_info & ACB_NORMAL) && name[strlen(name)-1] != '$') {
316                         add_script = talloc_strdup(tmp_ctx,
317                                         lp_adduser_script());
318                 } else {
319                         add_script = talloc_strdup(tmp_ctx,
320                                         lp_addmachine_script());
321                 }
322
323                 if (!add_script || add_script[0] == '\0') {
324                         DEBUG(3, ("Could not find user %s and no add script "
325                                   "defined\n", name));
326                         return NT_STATUS_NO_SUCH_USER;
327                 }
328
329                 /* lowercase the username before creating the Unix account for 
330                    compatibility with previous Samba releases */
331                 fstrcpy( name2, name );
332                 strlower_m( name2 );
333                 add_script = talloc_all_string_sub(tmp_ctx,
334                                         add_script,
335                                         "%u",
336                                         name2);
337                 if (!add_script) {
338                         return NT_STATUS_NO_MEMORY;
339                 }
340                 add_ret = smbrun(add_script,NULL);
341                 DEBUG(add_ret ? 0 : 3, ("_samr_create_user: Running the command `%s' gave %d\n",
342                                         add_script, add_ret));
343                 if (add_ret == 0) {
344                         smb_nscd_flush_user_cache();
345                 }
346
347                 flush_pwnam_cache();
348
349                 pwd = Get_Pwnam_alloc(tmp_ctx, name);
350         }
351
352         /* we have a valid SID coming out of this call */
353
354         status = samu_alloc_rid_unix( sam_pass, pwd );
355
356         TALLOC_FREE( pwd );
357
358         if (!NT_STATUS_IS_OK(status)) {
359                 DEBUG(3, ("pdb_default_create_user: failed to create a new user structure: %s\n", nt_errstr(status)));
360                 return status;
361         }
362
363         if (!sid_peek_check_rid(get_global_sam_sid(),
364                                 pdb_get_user_sid(sam_pass), rid)) {
365                 DEBUG(0, ("Could not get RID of fresh user\n"));
366                 return NT_STATUS_INTERNAL_ERROR;
367         }
368
369         /* Use the username case specified in the original request */
370
371         pdb_set_username( sam_pass, name, PDB_SET );
372
373         /* Disable the account on creation, it does not have a reasonable password yet. */
374
375         acb_info |= ACB_DISABLED;
376
377         pdb_set_acct_ctrl(sam_pass, acb_info, PDB_CHANGED);
378
379         status = pdb_add_sam_account(sam_pass);
380
381         TALLOC_FREE(sam_pass);
382
383         return status;
384 }
385
386 NTSTATUS pdb_create_user(TALLOC_CTX *mem_ctx, const char *name, uint32 flags,
387                          uint32 *rid)
388 {
389         struct pdb_methods *pdb = pdb_get_methods();
390         return pdb->create_user(pdb, mem_ctx, name, flags, rid);
391 }
392
393 /****************************************************************************
394  Delete a UNIX user on demand.
395 ****************************************************************************/
396
397 static int smb_delete_user(const char *unix_user)
398 {
399         char *del_script = NULL;
400         int ret;
401
402         /* safety check */
403
404         if ( strequal( unix_user, "root" ) ) {
405                 DEBUG(0,("smb_delete_user: Refusing to delete local system root account!\n"));
406                 return -1;
407         }
408
409         del_script = talloc_strdup(talloc_tos(), lp_deluser_script());
410         if (!del_script || !*del_script) {
411                 return -1;
412         }
413         del_script = talloc_all_string_sub(talloc_tos(),
414                                 del_script,
415                                 "%u",
416                                 unix_user);
417         if (!del_script) {
418                 return -1;
419         }
420         ret = smbrun(del_script,NULL);
421         flush_pwnam_cache();
422         if (ret == 0) {
423                 smb_nscd_flush_user_cache();
424         }
425         DEBUG(ret ? 0 : 3,("smb_delete_user: Running the command `%s' gave %d\n",del_script,ret));
426
427         return ret;
428 }
429
430 static NTSTATUS pdb_default_delete_user(struct pdb_methods *methods,
431                                         TALLOC_CTX *mem_ctx,
432                                         struct samu *sam_acct)
433 {
434         NTSTATUS status;
435         fstring username;
436
437         status = pdb_delete_sam_account(sam_acct);
438         if (!NT_STATUS_IS_OK(status)) {
439                 return status;
440         }
441
442         /*
443          * Now delete the unix side ....
444          * note: we don't check if the delete really happened as the script is
445          * not necessary present and maybe the sysadmin doesn't want to delete
446          * the unix side
447          */
448
449         /* always lower case the username before handing it off to 
450            external scripts */
451
452         fstrcpy( username, pdb_get_username(sam_acct) );
453         strlower_m( username );
454
455         smb_delete_user( username );
456         
457         return status;
458 }
459
460 NTSTATUS pdb_delete_user(TALLOC_CTX *mem_ctx, struct samu *sam_acct)
461 {
462         struct pdb_methods *pdb = pdb_get_methods();
463         uid_t uid = -1;
464
465         /* sanity check to make sure we don't delete root */
466
467         if ( !sid_to_uid( pdb_get_user_sid(sam_acct), &uid ) ) {
468                 return NT_STATUS_NO_SUCH_USER;
469         }
470
471         if ( uid == 0 ) {
472                 return NT_STATUS_ACCESS_DENIED;
473         }
474
475         return pdb->delete_user(pdb, mem_ctx, sam_acct);
476 }
477
478 NTSTATUS pdb_add_sam_account(struct samu *sam_acct) 
479 {
480         struct pdb_methods *pdb = pdb_get_methods();
481         return pdb->add_sam_account(pdb, sam_acct);
482 }
483
484 NTSTATUS pdb_update_sam_account(struct samu *sam_acct) 
485 {
486         struct pdb_methods *pdb = pdb_get_methods();
487
488         memcache_flush(NULL, PDB_GETPWSID_CACHE);
489
490         return pdb->update_sam_account(pdb, sam_acct);
491 }
492
493 NTSTATUS pdb_delete_sam_account(struct samu *sam_acct) 
494 {
495         struct pdb_methods *pdb = pdb_get_methods();
496
497         memcache_flush(NULL, PDB_GETPWSID_CACHE);
498
499         return pdb->delete_sam_account(pdb, sam_acct);
500 }
501
502 NTSTATUS pdb_rename_sam_account(struct samu *oldname, const char *newname)
503 {
504         struct pdb_methods *pdb = pdb_get_methods();
505         uid_t uid;
506         NTSTATUS status;
507
508         memcache_flush(NULL, PDB_GETPWSID_CACHE);
509
510         /* sanity check to make sure we don't rename root */
511
512         if ( !sid_to_uid( pdb_get_user_sid(oldname), &uid ) ) {
513                 return NT_STATUS_NO_SUCH_USER;
514         }
515
516         if ( uid == 0 ) {
517                 return NT_STATUS_ACCESS_DENIED;
518         }
519
520         status = pdb->rename_sam_account(pdb, oldname, newname);
521
522         /* always flush the cache here just to be safe */
523         flush_pwnam_cache();
524
525         return status;
526 }
527
528 NTSTATUS pdb_update_login_attempts(struct samu *sam_acct, bool success)
529 {
530         struct pdb_methods *pdb = pdb_get_methods();
531         return pdb->update_login_attempts(pdb, sam_acct, success);
532 }
533
534 bool pdb_getgrsid(GROUP_MAP *map, DOM_SID sid)
535 {
536         struct pdb_methods *pdb = pdb_get_methods();
537         return NT_STATUS_IS_OK(pdb->getgrsid(pdb, map, sid));
538 }
539
540 bool pdb_getgrgid(GROUP_MAP *map, gid_t gid)
541 {
542         struct pdb_methods *pdb = pdb_get_methods();
543         return NT_STATUS_IS_OK(pdb->getgrgid(pdb, map, gid));
544 }
545
546 bool pdb_getgrnam(GROUP_MAP *map, const char *name)
547 {
548         struct pdb_methods *pdb = pdb_get_methods();
549         return NT_STATUS_IS_OK(pdb->getgrnam(pdb, map, name));
550 }
551
552 static NTSTATUS pdb_default_create_dom_group(struct pdb_methods *methods,
553                                              TALLOC_CTX *mem_ctx,
554                                              const char *name,
555                                              uint32 *rid)
556 {
557         DOM_SID group_sid;
558         struct group *grp;
559         fstring tmp;
560
561         grp = getgrnam(name);
562
563         if (grp == NULL) {
564                 gid_t gid;
565
566                 if (smb_create_group(name, &gid) != 0) {
567                         return NT_STATUS_ACCESS_DENIED;
568                 }
569
570                 grp = getgrgid(gid);
571         }
572
573         if (grp == NULL) {
574                 return NT_STATUS_ACCESS_DENIED;
575         }
576
577         if (pdb_rid_algorithm()) {
578                 *rid = algorithmic_pdb_gid_to_group_rid( grp->gr_gid );
579         } else {
580                 if (!pdb_new_rid(rid)) {
581                         return NT_STATUS_ACCESS_DENIED;
582                 }
583         }
584
585         sid_compose(&group_sid, get_global_sam_sid(), *rid);
586                 
587         return add_initial_entry(grp->gr_gid, sid_to_fstring(tmp, &group_sid),
588                                  SID_NAME_DOM_GRP, name, NULL);
589 }
590
591 NTSTATUS pdb_create_dom_group(TALLOC_CTX *mem_ctx, const char *name,
592                               uint32 *rid)
593 {
594         struct pdb_methods *pdb = pdb_get_methods();
595         return pdb->create_dom_group(pdb, mem_ctx, name, rid);
596 }
597
598 static NTSTATUS pdb_default_delete_dom_group(struct pdb_methods *methods,
599                                              TALLOC_CTX *mem_ctx,
600                                              uint32 rid)
601 {
602         DOM_SID group_sid;
603         GROUP_MAP map;
604         NTSTATUS status;
605         struct group *grp;
606         const char *grp_name;
607
608         /* coverity */
609         map.gid = (gid_t) -1;
610
611         sid_compose(&group_sid, get_global_sam_sid(), rid);
612
613         if (!get_domain_group_from_sid(group_sid, &map)) {
614                 DEBUG(10, ("Could not find group for rid %d\n", rid));
615                 return NT_STATUS_NO_SUCH_GROUP;
616         }
617
618         /* We need the group name for the smb_delete_group later on */
619
620         if (map.gid == (gid_t)-1) {
621                 return NT_STATUS_NO_SUCH_GROUP;
622         }
623
624         grp = getgrgid(map.gid);
625         if (grp == NULL) {
626                 return NT_STATUS_NO_SUCH_GROUP;
627         }
628
629         /* Copy the name, no idea what pdb_delete_group_mapping_entry does.. */
630
631         grp_name = talloc_strdup(mem_ctx, grp->gr_name);
632         if (grp_name == NULL) {
633                 return NT_STATUS_NO_MEMORY;
634         }
635
636         status = pdb_delete_group_mapping_entry(group_sid);
637
638         if (!NT_STATUS_IS_OK(status)) {
639                 return status;
640         }
641
642         /* Don't check the result of smb_delete_group */
643         
644         smb_delete_group(grp_name);
645
646         return NT_STATUS_OK;
647 }
648
649 NTSTATUS pdb_delete_dom_group(TALLOC_CTX *mem_ctx, uint32 rid)
650 {
651         struct pdb_methods *pdb = pdb_get_methods();
652         return pdb->delete_dom_group(pdb, mem_ctx, rid);
653 }
654
655 NTSTATUS pdb_add_group_mapping_entry(GROUP_MAP *map)
656 {
657         struct pdb_methods *pdb = pdb_get_methods();
658         return pdb->add_group_mapping_entry(pdb, map);
659 }
660
661 NTSTATUS pdb_update_group_mapping_entry(GROUP_MAP *map)
662 {
663         struct pdb_methods *pdb = pdb_get_methods();
664         return pdb->update_group_mapping_entry(pdb, map);
665 }
666
667 NTSTATUS pdb_delete_group_mapping_entry(DOM_SID sid)
668 {
669         struct pdb_methods *pdb = pdb_get_methods();
670         return pdb->delete_group_mapping_entry(pdb, sid);
671 }
672
673 bool pdb_enum_group_mapping(const DOM_SID *sid, enum lsa_SidType sid_name_use, GROUP_MAP **pp_rmap,
674                             size_t *p_num_entries, bool unix_only)
675 {
676         struct pdb_methods *pdb = pdb_get_methods();
677         return NT_STATUS_IS_OK(pdb-> enum_group_mapping(pdb, sid, sid_name_use,
678                 pp_rmap, p_num_entries, unix_only));
679 }
680
681 NTSTATUS pdb_enum_group_members(TALLOC_CTX *mem_ctx,
682                                 const DOM_SID *sid,
683                                 uint32 **pp_member_rids,
684                                 size_t *p_num_members)
685 {
686         struct pdb_methods *pdb = pdb_get_methods();
687         NTSTATUS result;
688
689         result = pdb->enum_group_members(pdb, mem_ctx, 
690                         sid, pp_member_rids, p_num_members);
691                 
692         /* special check for rid 513 */
693                 
694         if ( !NT_STATUS_IS_OK( result ) ) {
695                 uint32 rid;
696                 
697                 sid_peek_rid( sid, &rid );
698                 
699                 if ( rid == DOMAIN_GROUP_RID_USERS ) {
700                         *p_num_members = 0;
701                         *pp_member_rids = NULL;
702                         
703                         return NT_STATUS_OK;
704                 }
705         }
706         
707         return result;
708 }
709
710 NTSTATUS pdb_enum_group_memberships(TALLOC_CTX *mem_ctx, struct samu *user,
711                                     DOM_SID **pp_sids, gid_t **pp_gids,
712                                     size_t *p_num_groups)
713 {
714         struct pdb_methods *pdb = pdb_get_methods();
715         return pdb->enum_group_memberships(
716                 pdb, mem_ctx, user,
717                 pp_sids, pp_gids, p_num_groups);
718 }
719
720 static NTSTATUS pdb_default_set_unix_primary_group(struct pdb_methods *methods,
721                                                    TALLOC_CTX *mem_ctx,
722                                                    struct samu *sampass)
723 {
724         struct group *grp;
725         gid_t gid;
726
727         if (!sid_to_gid(pdb_get_group_sid(sampass), &gid) ||
728             (grp = getgrgid(gid)) == NULL) {
729                 return NT_STATUS_INVALID_PRIMARY_GROUP;
730         }
731
732         if (smb_set_primary_group(grp->gr_name,
733                                   pdb_get_username(sampass)) != 0) {
734                 return NT_STATUS_ACCESS_DENIED;
735         }
736
737         return NT_STATUS_OK;
738 }
739
740 NTSTATUS pdb_set_unix_primary_group(TALLOC_CTX *mem_ctx, struct samu *user)
741 {
742         struct pdb_methods *pdb = pdb_get_methods();
743         return pdb->set_unix_primary_group(pdb, mem_ctx, user);
744 }
745
746 /*
747  * Helper function to see whether a user is in a group. We can't use
748  * user_in_group_sid here because this creates dependencies only smbd can
749  * fulfil.
750  */
751
752 static bool pdb_user_in_group(TALLOC_CTX *mem_ctx, struct samu *account,
753                               const DOM_SID *group_sid)
754 {
755         DOM_SID *sids;
756         gid_t *gids;
757         size_t i, num_groups;
758
759         if (!NT_STATUS_IS_OK(pdb_enum_group_memberships(mem_ctx, account,
760                                                         &sids, &gids,
761                                                         &num_groups))) {
762                 return False;
763         }
764
765         for (i=0; i<num_groups; i++) {
766                 if (sid_equal(group_sid, &sids[i])) {
767                         return True;
768                 }
769         }
770         return False;
771 }
772
773 static NTSTATUS pdb_default_add_groupmem(struct pdb_methods *methods,
774                                          TALLOC_CTX *mem_ctx,
775                                          uint32 group_rid,
776                                          uint32 member_rid)
777 {
778         DOM_SID group_sid, member_sid;
779         struct samu *account = NULL;
780         GROUP_MAP map;
781         struct group *grp;
782         struct passwd *pwd;
783         const char *group_name;
784         uid_t uid;
785
786         /* coverity */
787         map.gid = (gid_t) -1;
788
789         sid_compose(&group_sid, get_global_sam_sid(), group_rid);
790         sid_compose(&member_sid, get_global_sam_sid(), member_rid);
791
792         if (!get_domain_group_from_sid(group_sid, &map) ||
793             (map.gid == (gid_t)-1) ||
794             ((grp = getgrgid(map.gid)) == NULL)) {
795                 return NT_STATUS_NO_SUCH_GROUP;
796         }
797
798         group_name = talloc_strdup(mem_ctx, grp->gr_name);
799         if (group_name == NULL) {
800                 return NT_STATUS_NO_MEMORY;
801         }
802
803         if ( !(account = samu_new( NULL )) ) {
804                 return NT_STATUS_NO_MEMORY;
805         }
806
807         if (!pdb_getsampwsid(account, &member_sid) ||
808             !sid_to_uid(&member_sid, &uid) ||
809             ((pwd = getpwuid_alloc(mem_ctx, uid)) == NULL)) {
810                 return NT_STATUS_NO_SUCH_USER;
811         }
812
813         if (pdb_user_in_group(mem_ctx, account, &group_sid)) {
814                 return NT_STATUS_MEMBER_IN_GROUP;
815         }
816
817         /* 
818          * ok, the group exist, the user exist, the user is not in the group,
819          * we can (finally) add it to the group !
820          */
821
822         smb_add_user_group(group_name, pwd->pw_name);
823
824         if (!pdb_user_in_group(mem_ctx, account, &group_sid)) {
825                 return NT_STATUS_ACCESS_DENIED;
826         }
827
828         return NT_STATUS_OK;
829 }
830
831 NTSTATUS pdb_add_groupmem(TALLOC_CTX *mem_ctx, uint32 group_rid,
832                           uint32 member_rid)
833 {
834         struct pdb_methods *pdb = pdb_get_methods();
835         return pdb->add_groupmem(pdb, mem_ctx, group_rid, member_rid);
836 }
837
838 static NTSTATUS pdb_default_del_groupmem(struct pdb_methods *methods,
839                                          TALLOC_CTX *mem_ctx,
840                                          uint32 group_rid,
841                                          uint32 member_rid)
842 {
843         DOM_SID group_sid, member_sid;
844         struct samu *account = NULL;
845         GROUP_MAP map;
846         struct group *grp;
847         struct passwd *pwd;
848         const char *group_name;
849         uid_t uid;
850
851         sid_compose(&group_sid, get_global_sam_sid(), group_rid);
852         sid_compose(&member_sid, get_global_sam_sid(), member_rid);
853
854         if (!get_domain_group_from_sid(group_sid, &map) ||
855             (map.gid == (gid_t)-1) ||
856             ((grp = getgrgid(map.gid)) == NULL)) {
857                 return NT_STATUS_NO_SUCH_GROUP;
858         }
859
860         group_name = talloc_strdup(mem_ctx, grp->gr_name);
861         if (group_name == NULL) {
862                 return NT_STATUS_NO_MEMORY;
863         }
864
865         if ( !(account = samu_new( NULL )) ) {
866                 return NT_STATUS_NO_MEMORY;
867         }
868
869         if (!pdb_getsampwsid(account, &member_sid) ||
870             !sid_to_uid(&member_sid, &uid) ||
871             ((pwd = getpwuid_alloc(mem_ctx, uid)) == NULL)) {
872                 return NT_STATUS_NO_SUCH_USER;
873         }
874
875         if (!pdb_user_in_group(mem_ctx, account, &group_sid)) {
876                 return NT_STATUS_MEMBER_NOT_IN_GROUP;
877         }
878
879         /* 
880          * ok, the group exist, the user exist, the user is in the group,
881          * we can (finally) delete it from the group!
882          */
883
884         smb_delete_user_group(group_name, pwd->pw_name);
885
886         if (pdb_user_in_group(mem_ctx, account, &group_sid)) {
887                 return NT_STATUS_ACCESS_DENIED;
888         }
889
890         return NT_STATUS_OK;
891 }
892
893 NTSTATUS pdb_del_groupmem(TALLOC_CTX *mem_ctx, uint32 group_rid,
894                           uint32 member_rid)
895 {
896         struct pdb_methods *pdb = pdb_get_methods();
897         return pdb->del_groupmem(pdb, mem_ctx, group_rid, member_rid);
898 }
899
900 NTSTATUS pdb_create_alias(const char *name, uint32 *rid)
901 {
902         struct pdb_methods *pdb = pdb_get_methods();
903         return pdb->create_alias(pdb, name, rid);
904 }
905
906 NTSTATUS pdb_delete_alias(const DOM_SID *sid)
907 {
908         struct pdb_methods *pdb = pdb_get_methods();
909         return pdb->delete_alias(pdb, sid);
910 }
911
912 NTSTATUS pdb_get_aliasinfo(const DOM_SID *sid, struct acct_info *info)
913 {
914         struct pdb_methods *pdb = pdb_get_methods();
915         return pdb->get_aliasinfo(pdb, sid, info);
916 }
917
918 NTSTATUS pdb_set_aliasinfo(const DOM_SID *sid, struct acct_info *info)
919 {
920         struct pdb_methods *pdb = pdb_get_methods();
921         return pdb->set_aliasinfo(pdb, sid, info);
922 }
923
924 NTSTATUS pdb_add_aliasmem(const DOM_SID *alias, const DOM_SID *member)
925 {
926         struct pdb_methods *pdb = pdb_get_methods();
927         return pdb->add_aliasmem(pdb, alias, member);
928 }
929
930 NTSTATUS pdb_del_aliasmem(const DOM_SID *alias, const DOM_SID *member)
931 {
932         struct pdb_methods *pdb = pdb_get_methods();
933         return pdb->del_aliasmem(pdb, alias, member);
934 }
935
936 NTSTATUS pdb_enum_aliasmem(const DOM_SID *alias, TALLOC_CTX *mem_ctx,
937                            DOM_SID **pp_members, size_t *p_num_members)
938 {
939         struct pdb_methods *pdb = pdb_get_methods();
940         return pdb->enum_aliasmem(pdb, alias, mem_ctx, pp_members,
941                                   p_num_members);
942 }
943
944 NTSTATUS pdb_enum_alias_memberships(TALLOC_CTX *mem_ctx,
945                                     const DOM_SID *domain_sid,
946                                     const DOM_SID *members, size_t num_members,
947                                     uint32 **pp_alias_rids,
948                                     size_t *p_num_alias_rids)
949 {
950         struct pdb_methods *pdb = pdb_get_methods();
951         return pdb->enum_alias_memberships(pdb, mem_ctx,
952                                                        domain_sid,
953                                                        members, num_members,
954                                                        pp_alias_rids,
955                                                        p_num_alias_rids);
956 }
957
958 NTSTATUS pdb_lookup_rids(const DOM_SID *domain_sid,
959                          int num_rids,
960                          uint32 *rids,
961                          const char **names,
962                          enum lsa_SidType *attrs)
963 {
964         struct pdb_methods *pdb = pdb_get_methods();
965         return pdb->lookup_rids(pdb, domain_sid, num_rids, rids, names, attrs);
966 }
967
968 /* 
969  * NOTE: pdb_lookup_names is currently (2007-01-12) not used anywhere 
970  *       in the samba code.
971  *       Unlike _lsa_lookup_sids and _samr_lookup_rids, which eventually 
972  *       also ask pdb_lookup_rids, thus looking up a bunch of rids at a time, 
973  *       the pdb_ calls _lsa_lookup_names and _samr_lookup_names come
974  *       down to are pdb_getsampwnam and pdb_getgrnam instead of
975  *       pdb_lookup_names.
976  *       But in principle, it the call belongs to the API and might get
977  *       used in this context some day. 
978  */
979 #if 0
980 NTSTATUS pdb_lookup_names(const DOM_SID *domain_sid,
981                           int num_names,
982                           const char **names,
983                           uint32 *rids,
984                           enum lsa_SidType *attrs)
985 {
986         struct pdb_methods *pdb = pdb_get_methods();
987         return pdb->lookup_names(pdb, domain_sid, num_names, names, rids, attrs);
988 }
989 #endif
990
991 bool pdb_get_account_policy(int policy_index, uint32 *value)
992 {
993         struct pdb_methods *pdb = pdb_get_methods();
994         NTSTATUS status;
995         
996         become_root();
997         status = pdb->get_account_policy(pdb, policy_index, value);
998         unbecome_root();
999         
1000         return NT_STATUS_IS_OK(status); 
1001 }
1002
1003 bool pdb_set_account_policy(int policy_index, uint32 value)
1004 {
1005         struct pdb_methods *pdb = pdb_get_methods();
1006         NTSTATUS status;
1007
1008         become_root();
1009         status = pdb->set_account_policy(pdb, policy_index, value);
1010         unbecome_root();
1011
1012         return NT_STATUS_IS_OK(status);
1013 }
1014
1015 bool pdb_get_seq_num(time_t *seq_num)
1016 {
1017         struct pdb_methods *pdb = pdb_get_methods();
1018         return NT_STATUS_IS_OK(pdb->get_seq_num(pdb, seq_num));
1019 }
1020
1021 bool pdb_uid_to_rid(uid_t uid, uint32 *rid)
1022 {
1023         struct pdb_methods *pdb = pdb_get_methods();
1024         return pdb->uid_to_rid(pdb, uid, rid);
1025 }
1026
1027 bool pdb_uid_to_sid(uid_t uid, DOM_SID *sid)
1028 {
1029         struct pdb_methods *pdb = pdb_get_methods();
1030         return pdb->uid_to_sid(pdb, uid, sid);
1031 }
1032
1033 bool pdb_gid_to_sid(gid_t gid, DOM_SID *sid)
1034 {
1035         struct pdb_methods *pdb = pdb_get_methods();
1036         return pdb->gid_to_sid(pdb, gid, sid);
1037 }
1038
1039 bool pdb_sid_to_id(const DOM_SID *sid, union unid_t *id,
1040                    enum lsa_SidType *type)
1041 {
1042         struct pdb_methods *pdb = pdb_get_methods();
1043         return pdb->sid_to_id(pdb, sid, id, type);
1044 }
1045
1046 bool pdb_rid_algorithm(void)
1047 {
1048         struct pdb_methods *pdb = pdb_get_methods();
1049         return pdb->rid_algorithm(pdb);
1050 }
1051
1052 /********************************************************************
1053  Allocate a new RID from the passdb backend.  Verify that it is free
1054  by calling lookup_global_sam_rid() to verify that the RID is not
1055  in use.  This handles servers that have existing users or groups
1056  with add RIDs (assigned from previous algorithmic mappings)
1057 ********************************************************************/
1058
1059 bool pdb_new_rid(uint32 *rid)
1060 {
1061         struct pdb_methods *pdb = pdb_get_methods();
1062         const char *name = NULL;
1063         enum lsa_SidType type;
1064         uint32 allocated_rid = 0;
1065         int i;
1066         TALLOC_CTX *ctx;
1067
1068         if (pdb_rid_algorithm()) {
1069                 DEBUG(0, ("Trying to allocate a RID when algorithmic RIDs "
1070                           "are active\n"));
1071                 return False;
1072         }
1073
1074         if (algorithmic_rid_base() != BASE_RID) {
1075                 DEBUG(0, ("'algorithmic rid base' is set but a passdb backend "
1076                           "without algorithmic RIDs is chosen.\n"));
1077                 DEBUGADD(0, ("Please map all used groups using 'net groupmap "
1078                              "add', set the maximum used RID\n"));
1079                 DEBUGADD(0, ("and remove the parameter\n"));
1080                 return False;
1081         }
1082
1083         if ( (ctx = talloc_init("pdb_new_rid")) == NULL ) {
1084                 DEBUG(0,("pdb_new_rid: Talloc initialization failure\n"));
1085                 return False;
1086         }
1087
1088         /* Attempt to get an unused RID (max tires is 250...yes that it is 
1089            and arbitrary number I pulkled out of my head).   -- jerry */
1090
1091         for ( i=0; allocated_rid==0 && i<250; i++ ) {
1092                 /* get a new RID */
1093
1094                 if ( !pdb->new_rid(pdb, &allocated_rid) ) {
1095                         return False;
1096                 }
1097
1098                 /* validate that the RID is not in use */
1099
1100                 if ( lookup_global_sam_rid( ctx, allocated_rid, &name, &type, NULL ) ) {
1101                         allocated_rid = 0;
1102                 }
1103         }
1104
1105         TALLOC_FREE( ctx );
1106
1107         if ( allocated_rid == 0 ) {
1108                 DEBUG(0,("pdb_new_rid: Failed to find unused RID\n"));
1109                 return False;
1110         }
1111
1112         *rid = allocated_rid;
1113
1114         return True;
1115 }
1116
1117 /***************************************************************
1118   Initialize the static context (at smbd startup etc). 
1119
1120   If uninitialised, context will auto-init on first use.
1121  ***************************************************************/
1122
1123 bool initialize_password_db(bool reload, struct event_context *event_ctx)
1124 {
1125         pdb_event_ctx = event_ctx;
1126         return (pdb_get_methods_reload(reload) != NULL);
1127 }
1128
1129
1130 /***************************************************************************
1131   Default implementations of some functions.
1132  ****************************************************************************/
1133
1134 static NTSTATUS pdb_default_getsampwnam (struct pdb_methods *methods, struct samu *user, const char *sname)
1135 {
1136         return NT_STATUS_NO_SUCH_USER;
1137 }
1138
1139 static NTSTATUS pdb_default_getsampwsid(struct pdb_methods *my_methods, struct samu * user, const DOM_SID *sid)
1140 {
1141         return NT_STATUS_NO_SUCH_USER;
1142 }
1143
1144 static NTSTATUS pdb_default_add_sam_account (struct pdb_methods *methods, struct samu *newpwd)
1145 {
1146         return NT_STATUS_NOT_IMPLEMENTED;
1147 }
1148
1149 static NTSTATUS pdb_default_update_sam_account (struct pdb_methods *methods, struct samu *newpwd)
1150 {
1151         return NT_STATUS_NOT_IMPLEMENTED;
1152 }
1153
1154 static NTSTATUS pdb_default_delete_sam_account (struct pdb_methods *methods, struct samu *pwd)
1155 {
1156         return NT_STATUS_NOT_IMPLEMENTED;
1157 }
1158
1159 static NTSTATUS pdb_default_rename_sam_account (struct pdb_methods *methods, struct samu *pwd, const char *newname)
1160 {
1161         return NT_STATUS_NOT_IMPLEMENTED;
1162 }
1163
1164 static NTSTATUS pdb_default_update_login_attempts (struct pdb_methods *methods, struct samu *newpwd, bool success)
1165 {
1166         /* Only the pdb_nds backend implements this, by
1167          * default just return ok. */
1168         return NT_STATUS_OK;
1169 }
1170
1171 static NTSTATUS pdb_default_get_account_policy(struct pdb_methods *methods, int policy_index, uint32 *value)
1172 {
1173         return account_policy_get(policy_index, value) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
1174 }
1175
1176 static NTSTATUS pdb_default_set_account_policy(struct pdb_methods *methods, int policy_index, uint32 value)
1177 {
1178         return account_policy_set(policy_index, value) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
1179 }
1180
1181 static NTSTATUS pdb_default_get_seq_num(struct pdb_methods *methods, time_t *seq_num)
1182 {
1183         *seq_num = time(NULL);
1184         return NT_STATUS_OK;
1185 }
1186
1187 static bool pdb_default_uid_to_sid(struct pdb_methods *methods, uid_t uid,
1188                                    DOM_SID *sid)
1189 {
1190         struct samu *sampw = NULL;
1191         struct passwd *unix_pw;
1192         bool ret;
1193         
1194         unix_pw = sys_getpwuid( uid );
1195
1196         if ( !unix_pw ) {
1197                 DEBUG(4,("pdb_default_uid_to_rid: host has no idea of uid "
1198                          "%lu\n", (unsigned long)uid));
1199                 return False;
1200         }
1201         
1202         if ( !(sampw = samu_new( NULL )) ) {
1203                 DEBUG(0,("pdb_default_uid_to_rid: samu_new() failed!\n"));
1204                 return False;
1205         }
1206
1207         become_root();
1208         ret = NT_STATUS_IS_OK(
1209                 methods->getsampwnam(methods, sampw, unix_pw->pw_name ));
1210         unbecome_root();
1211
1212         if (!ret) {
1213                 DEBUG(5, ("pdb_default_uid_to_rid: Did not find user "
1214                           "%s (%u)\n", unix_pw->pw_name, (unsigned int)uid));
1215                 TALLOC_FREE(sampw);
1216                 return False;
1217         }
1218
1219         sid_copy(sid, pdb_get_user_sid(sampw));
1220
1221         TALLOC_FREE(sampw);
1222
1223         return True;
1224 }
1225
1226 static bool pdb_default_uid_to_rid(struct pdb_methods *methods, uid_t uid,
1227                                    uint32 *rid)
1228 {
1229         DOM_SID sid;
1230         bool ret;
1231
1232         ret = pdb_default_uid_to_sid(methods, uid, &sid);
1233         if (!ret) {
1234                 return ret;
1235         }
1236         
1237         ret = sid_peek_check_rid(get_global_sam_sid(), &sid, rid);
1238
1239         if (!ret) {
1240                 DEBUG(1, ("Could not peek rid out of sid %s\n",
1241                           sid_string_dbg(&sid)));
1242         }
1243
1244         return ret;
1245 }
1246
1247 static bool pdb_default_gid_to_sid(struct pdb_methods *methods, gid_t gid,
1248                                    DOM_SID *sid)
1249 {
1250         GROUP_MAP map;
1251
1252         if (!NT_STATUS_IS_OK(methods->getgrgid(methods, &map, gid))) {
1253                 return False;
1254         }
1255
1256         sid_copy(sid, &map.sid);
1257         return True;
1258 }
1259
1260 static bool pdb_default_sid_to_id(struct pdb_methods *methods,
1261                                   const DOM_SID *sid,
1262                                   union unid_t *id, enum lsa_SidType *type)
1263 {
1264         TALLOC_CTX *mem_ctx;
1265         bool ret = False;
1266         const char *name;
1267         uint32 rid;
1268
1269         mem_ctx = talloc_new(NULL);
1270
1271         if (mem_ctx == NULL) {
1272                 DEBUG(0, ("talloc_new failed\n"));
1273                 return False;
1274         }
1275
1276         if (sid_peek_check_rid(get_global_sam_sid(), sid, &rid)) {
1277                 /* Here we might have users as well as groups and aliases */
1278                 ret = lookup_global_sam_rid(mem_ctx, rid, &name, type, id);
1279                 goto done;
1280         }
1281
1282         /* check for "Unix User" */
1283
1284         if ( sid_peek_check_rid(&global_sid_Unix_Users, sid, &rid) ) {
1285                 id->uid = rid;
1286                 *type = SID_NAME_USER;
1287                 ret = True;             
1288                 goto done;              
1289         }
1290         
1291         /* check for "Unix Group" */
1292
1293         if ( sid_peek_check_rid(&global_sid_Unix_Groups, sid, &rid) ) {
1294                 id->gid = rid;
1295                 *type = SID_NAME_ALIAS;
1296                 ret = True;             
1297                 goto done;              
1298         }
1299         
1300         /* BUILTIN */
1301
1302         if (sid_check_is_in_builtin(sid) ||
1303             sid_check_is_in_wellknown_domain(sid)) {
1304                 /* Here we only have aliases */
1305                 GROUP_MAP map;
1306                 if (!NT_STATUS_IS_OK(methods->getgrsid(methods, &map, *sid))) {
1307                         DEBUG(10, ("Could not find map for sid %s\n",
1308                                    sid_string_dbg(sid)));
1309                         goto done;
1310                 }
1311                 if ((map.sid_name_use != SID_NAME_ALIAS) &&
1312                     (map.sid_name_use != SID_NAME_WKN_GRP)) {
1313                         DEBUG(10, ("Map for sid %s is a %s, expected an "
1314                                    "alias\n", sid_string_dbg(sid),
1315                                    sid_type_lookup(map.sid_name_use)));
1316                         goto done;
1317                 }
1318
1319                 id->gid = map.gid;
1320                 *type = SID_NAME_ALIAS;
1321                 ret = True;
1322                 goto done;
1323         }
1324
1325         DEBUG(5, ("Sid %s is neither ours, a Unix SID, nor builtin\n",
1326                   sid_string_dbg(sid)));
1327
1328  done:
1329
1330         TALLOC_FREE(mem_ctx);
1331         return ret;
1332 }
1333
1334 static bool get_memberuids(TALLOC_CTX *mem_ctx, gid_t gid, uid_t **pp_uids, size_t *p_num)
1335 {
1336         struct group *grp;
1337         char **gr;
1338         struct passwd *pwd;
1339         bool winbind_env;
1340         bool ret = False;
1341  
1342         *pp_uids = NULL;
1343         *p_num = 0;
1344
1345         /* We only look at our own sam, so don't care about imported stuff */
1346         winbind_env = winbind_env_set();
1347         (void)winbind_off();
1348
1349         if ((grp = getgrgid(gid)) == NULL) {
1350                 /* allow winbindd lookups, but only if they weren't already disabled */
1351                 goto done;
1352         }
1353
1354         /* Primary group members */
1355         setpwent();
1356         while ((pwd = getpwent()) != NULL) {
1357                 if (pwd->pw_gid == gid) {
1358                         if (!add_uid_to_array_unique(mem_ctx, pwd->pw_uid,
1359                                                 pp_uids, p_num)) {
1360                                 goto done;
1361                         }
1362                 }
1363         }
1364         endpwent();
1365
1366         /* Secondary group members */
1367         for (gr = grp->gr_mem; (*gr != NULL) && ((*gr)[0] != '\0'); gr += 1) {
1368                 struct passwd *pw = getpwnam(*gr);
1369
1370                 if (pw == NULL)
1371                         continue;
1372                 if (!add_uid_to_array_unique(mem_ctx, pw->pw_uid, pp_uids, p_num)) {
1373                         goto done;
1374                 }
1375         }
1376
1377         ret = True;
1378
1379   done:
1380
1381         /* allow winbindd lookups, but only if they weren't already disabled */
1382         if (!winbind_env) {
1383                 (void)winbind_on();
1384         }
1385         
1386         return ret;
1387 }
1388
1389 static NTSTATUS pdb_default_enum_group_members(struct pdb_methods *methods,
1390                                                TALLOC_CTX *mem_ctx,
1391                                                const DOM_SID *group,
1392                                                uint32 **pp_member_rids,
1393                                                size_t *p_num_members)
1394 {
1395         gid_t gid;
1396         uid_t *uids;
1397         size_t i, num_uids;
1398
1399         *pp_member_rids = NULL;
1400         *p_num_members = 0;
1401
1402         if (!sid_to_gid(group, &gid))
1403                 return NT_STATUS_NO_SUCH_GROUP;
1404
1405         if(!get_memberuids(mem_ctx, gid, &uids, &num_uids))
1406                 return NT_STATUS_NO_SUCH_GROUP;
1407
1408         if (num_uids == 0)
1409                 return NT_STATUS_OK;
1410
1411         *pp_member_rids = TALLOC_ZERO_ARRAY(mem_ctx, uint32, num_uids);
1412
1413         for (i=0; i<num_uids; i++) {
1414                 DOM_SID sid;
1415
1416                 uid_to_sid(&sid, uids[i]);
1417
1418                 if (!sid_check_is_in_our_domain(&sid)) {
1419                         DEBUG(5, ("Inconsistent SAM -- group member uid not "
1420                                   "in our domain\n"));
1421                         continue;
1422                 }
1423
1424                 sid_peek_rid(&sid, &(*pp_member_rids)[*p_num_members]);
1425                 *p_num_members += 1;
1426         }
1427
1428         return NT_STATUS_OK;
1429 }
1430
1431 static NTSTATUS pdb_default_enum_group_memberships(struct pdb_methods *methods,
1432                                                    TALLOC_CTX *mem_ctx,
1433                                                    struct samu *user,
1434                                                    DOM_SID **pp_sids,
1435                                                    gid_t **pp_gids,
1436                                                    size_t *p_num_groups)
1437 {
1438         size_t i;
1439         gid_t gid;
1440         struct passwd *pw;
1441         const char *username = pdb_get_username(user);
1442         
1443
1444         /* Ignore the primary group SID.  Honor the real Unix primary group.
1445            The primary group SID is only of real use to Windows clients */
1446            
1447         if ( !(pw = getpwnam_alloc(mem_ctx, username)) ) {
1448                 return NT_STATUS_NO_SUCH_USER;
1449         }
1450         
1451         gid = pw->pw_gid;
1452         
1453         TALLOC_FREE( pw );
1454
1455         if (!getgroups_unix_user(mem_ctx, username, gid, pp_gids, p_num_groups)) {
1456                 return NT_STATUS_NO_SUCH_USER;
1457         }
1458
1459         if (*p_num_groups == 0) {
1460                 smb_panic("primary group missing");
1461         }
1462
1463         *pp_sids = TALLOC_ARRAY(mem_ctx, DOM_SID, *p_num_groups);
1464
1465         if (*pp_sids == NULL) {
1466                 TALLOC_FREE(*pp_gids);
1467                 return NT_STATUS_NO_MEMORY;
1468         }
1469
1470         for (i=0; i<*p_num_groups; i++) {
1471                 gid_to_sid(&(*pp_sids)[i], (*pp_gids)[i]);
1472         }
1473
1474         return NT_STATUS_OK;
1475 }
1476
1477 /*******************************************************************
1478  Look up a rid in the SAM we're responsible for (i.e. passdb)
1479  ********************************************************************/
1480
1481 static bool lookup_global_sam_rid(TALLOC_CTX *mem_ctx, uint32 rid,
1482                                   const char **name,
1483                                   enum lsa_SidType *psid_name_use,
1484                                   union unid_t *unix_id)
1485 {
1486         struct samu *sam_account = NULL;
1487         GROUP_MAP map;
1488         bool ret;
1489         DOM_SID sid;
1490
1491         *psid_name_use = SID_NAME_UNKNOWN;
1492         
1493         DEBUG(5,("lookup_global_sam_rid: looking up RID %u.\n",
1494                  (unsigned int)rid));
1495
1496         sid_copy(&sid, get_global_sam_sid());
1497         sid_append_rid(&sid, rid);
1498         
1499         /* see if the passdb can help us with the name of the user */
1500
1501         if ( !(sam_account = samu_new( NULL )) ) {
1502                 return False;
1503         }
1504
1505         /* BEING ROOT BLLOCK */
1506         become_root();
1507         if (pdb_getsampwsid(sam_account, &sid)) {
1508                 struct passwd *pw;
1509
1510                 unbecome_root();                /* -----> EXIT BECOME_ROOT() */
1511                 *name = talloc_strdup(mem_ctx, pdb_get_username(sam_account));
1512                 if (!*name) {
1513                         TALLOC_FREE(sam_account);
1514                         return False;
1515                 }
1516
1517                 *psid_name_use = SID_NAME_USER;
1518
1519                 TALLOC_FREE(sam_account);
1520
1521                 if (unix_id == NULL) {
1522                         return True;
1523                 }
1524
1525                 pw = Get_Pwnam_alloc(talloc_tos(), *name);
1526                 if (pw == NULL) {
1527                         return False;
1528                 }
1529                 unix_id->uid = pw->pw_uid;
1530                 TALLOC_FREE(pw);
1531                 return True;
1532         }
1533         TALLOC_FREE(sam_account);
1534         
1535         ret = pdb_getgrsid(&map, sid);
1536         unbecome_root();
1537         /* END BECOME_ROOT BLOCK */
1538   
1539         /* do not resolve SIDs to a name unless there is a valid 
1540            gid associated with it */
1541                    
1542         if ( ret && (map.gid != (gid_t)-1) ) {
1543                 *name = talloc_strdup(mem_ctx, map.nt_name);
1544                 *psid_name_use = map.sid_name_use;
1545
1546                 if ( unix_id ) {
1547                         unix_id->gid = map.gid;
1548                 }
1549
1550                 return True;
1551         }
1552         
1553         /* Windows will always map RID 513 to something.  On a non-domain 
1554            controller, this gets mapped to SERVER\None. */
1555
1556         if ( unix_id ) {
1557                 DEBUG(5, ("Can't find a unix id for an unmapped group\n"));
1558                 return False;
1559         }
1560         
1561         if ( rid == DOMAIN_GROUP_RID_USERS ) {
1562                 *name = talloc_strdup(mem_ctx, "None" );
1563                 *psid_name_use = SID_NAME_DOM_GRP;
1564                 
1565                 return True;
1566         }
1567
1568         return False;
1569 }
1570
1571 static NTSTATUS pdb_default_lookup_rids(struct pdb_methods *methods,
1572                                         const DOM_SID *domain_sid,
1573                                         int num_rids,
1574                                         uint32 *rids,
1575                                         const char **names,
1576                                         enum lsa_SidType *attrs)
1577 {
1578         int i;
1579         NTSTATUS result;
1580         bool have_mapped = False;
1581         bool have_unmapped = False;
1582
1583         if (sid_check_is_builtin(domain_sid)) {
1584
1585                 for (i=0; i<num_rids; i++) {
1586                         const char *name;
1587
1588                         if (lookup_builtin_rid(names, rids[i], &name)) {
1589                                 attrs[i] = SID_NAME_ALIAS;
1590                                 names[i] = name;
1591                                 DEBUG(5,("lookup_rids: %s:%d\n",
1592                                          names[i], attrs[i]));
1593                                 have_mapped = True;
1594                         } else {
1595                                 have_unmapped = True;
1596                                 attrs[i] = SID_NAME_UNKNOWN;
1597                         }
1598                 }
1599                 goto done;
1600         }
1601
1602         /* Should not happen, but better check once too many */
1603         if (!sid_check_is_domain(domain_sid)) {
1604                 return NT_STATUS_INVALID_HANDLE;
1605         }
1606
1607         for (i = 0; i < num_rids; i++) {
1608                 const char *name;
1609
1610                 if (lookup_global_sam_rid(names, rids[i], &name, &attrs[i],
1611                                           NULL)) {
1612                         if (name == NULL) {
1613                                 return NT_STATUS_NO_MEMORY;
1614                         }
1615                         names[i] = name;
1616                         DEBUG(5,("lookup_rids: %s:%d\n", names[i], attrs[i]));
1617                         have_mapped = True;
1618                 } else {
1619                         have_unmapped = True;
1620                         attrs[i] = SID_NAME_UNKNOWN;
1621                 }
1622         }
1623
1624  done:
1625
1626         result = NT_STATUS_NONE_MAPPED;
1627
1628         if (have_mapped)
1629                 result = have_unmapped ? STATUS_SOME_UNMAPPED : NT_STATUS_OK;
1630
1631         return result;
1632 }
1633
1634 #if 0
1635 static NTSTATUS pdb_default_lookup_names(struct pdb_methods *methods,
1636                                          const DOM_SID *domain_sid,
1637                                          int num_names,
1638                                          const char **names,
1639                                          uint32 *rids,
1640                                          enum lsa_SidType *attrs)
1641 {
1642         int i;
1643         NTSTATUS result;
1644         bool have_mapped = False;
1645         bool have_unmapped = False;
1646
1647         if (sid_check_is_builtin(domain_sid)) {
1648
1649                 for (i=0; i<num_names; i++) {
1650                         uint32 rid;
1651
1652                         if (lookup_builtin_name(names[i], &rid)) {
1653                                 attrs[i] = SID_NAME_ALIAS;
1654                                 rids[i] = rid;
1655                                 DEBUG(5,("lookup_rids: %s:%d\n",
1656                                          names[i], attrs[i]));
1657                                 have_mapped = True;
1658                         } else {
1659                                 have_unmapped = True;
1660                                 attrs[i] = SID_NAME_UNKNOWN;
1661                         }
1662                 }
1663                 goto done;
1664         }
1665
1666         /* Should not happen, but better check once too many */
1667         if (!sid_check_is_domain(domain_sid)) {
1668                 return NT_STATUS_INVALID_HANDLE;
1669         }
1670
1671         for (i = 0; i < num_names; i++) {
1672                 if (lookup_global_sam_name(names[i], 0, &rids[i], &attrs[i])) {
1673                         DEBUG(5,("lookup_names: %s-> %d:%d\n", names[i],
1674                                  rids[i], attrs[i]));
1675                         have_mapped = True;
1676                 } else {
1677                         have_unmapped = True;
1678                         attrs[i] = SID_NAME_UNKNOWN;
1679                 }
1680         }
1681
1682  done:
1683
1684         result = NT_STATUS_NONE_MAPPED;
1685
1686         if (have_mapped)
1687                 result = have_unmapped ? STATUS_SOME_UNMAPPED : NT_STATUS_OK;
1688
1689         return result;
1690 }
1691 #endif
1692
1693 static int pdb_search_destructor(struct pdb_search *search)
1694 {
1695         if ((!search->search_ended) && (search->search_end != NULL)) {
1696                 search->search_end(search);
1697         }
1698         return 0;
1699 }
1700
1701 struct pdb_search *pdb_search_init(TALLOC_CTX *mem_ctx,
1702                                    enum pdb_search_type type)
1703 {
1704         struct pdb_search *result;
1705
1706         result = talloc(mem_ctx, struct pdb_search);
1707         if (result == NULL) {
1708                 DEBUG(0, ("talloc failed\n"));
1709                 return NULL;
1710         }
1711
1712         result->type = type;
1713         result->cache = NULL;
1714         result->num_entries = 0;
1715         result->cache_size = 0;
1716         result->search_ended = False;
1717         result->search_end = NULL;
1718
1719         /* Segfault appropriately if not initialized */
1720         result->next_entry = NULL;
1721         result->search_end = NULL;
1722
1723         talloc_set_destructor(result, pdb_search_destructor);
1724
1725         return result;
1726 }
1727
1728 static void fill_displayentry(TALLOC_CTX *mem_ctx, uint32 rid,
1729                               uint16 acct_flags,
1730                               const char *account_name,
1731                               const char *fullname,
1732                               const char *description,
1733                               struct samr_displayentry *entry)
1734 {
1735         entry->rid = rid;
1736         entry->acct_flags = acct_flags;
1737
1738         if (account_name != NULL)
1739                 entry->account_name = talloc_strdup(mem_ctx, account_name);
1740         else
1741                 entry->account_name = "";
1742
1743         if (fullname != NULL)
1744                 entry->fullname = talloc_strdup(mem_ctx, fullname);
1745         else
1746                 entry->fullname = "";
1747
1748         if (description != NULL)
1749                 entry->description = talloc_strdup(mem_ctx, description);
1750         else
1751                 entry->description = "";
1752 }
1753
1754 struct group_search {
1755         GROUP_MAP *groups;
1756         size_t num_groups, current_group;
1757 };
1758
1759 static bool next_entry_groups(struct pdb_search *s,
1760                               struct samr_displayentry *entry)
1761 {
1762         struct group_search *state = (struct group_search *)s->private_data;
1763         uint32 rid;
1764         GROUP_MAP *map = &state->groups[state->current_group];
1765
1766         if (state->current_group == state->num_groups)
1767                 return False;
1768
1769         sid_peek_rid(&map->sid, &rid);
1770
1771         fill_displayentry(s, rid, 0, map->nt_name, NULL, map->comment, entry);
1772
1773         state->current_group += 1;
1774         return True;
1775 }
1776
1777 static void search_end_groups(struct pdb_search *search)
1778 {
1779         struct group_search *state =
1780                 (struct group_search *)search->private_data;
1781         SAFE_FREE(state->groups);
1782 }
1783
1784 static bool pdb_search_grouptype(struct pdb_search *search,
1785                                  const DOM_SID *sid, enum lsa_SidType type)
1786 {
1787         struct group_search *state;
1788
1789         state = talloc(search, struct group_search);
1790         if (state == NULL) {
1791                 DEBUG(0, ("talloc failed\n"));
1792                 return False;
1793         }
1794
1795         if (!pdb_enum_group_mapping(sid, type, &state->groups, &state->num_groups,
1796                                     True)) {
1797                 DEBUG(0, ("Could not enum groups\n"));
1798                 return False;
1799         }
1800
1801         state->current_group = 0;
1802         search->private_data = state;
1803         search->next_entry = next_entry_groups;
1804         search->search_end = search_end_groups;
1805         return True;
1806 }
1807
1808 static bool pdb_default_search_groups(struct pdb_methods *methods,
1809                                       struct pdb_search *search)
1810 {
1811         return pdb_search_grouptype(search, get_global_sam_sid(), SID_NAME_DOM_GRP);
1812 }
1813
1814 static bool pdb_default_search_aliases(struct pdb_methods *methods,
1815                                        struct pdb_search *search,
1816                                        const DOM_SID *sid)
1817 {
1818
1819         return pdb_search_grouptype(search, sid, SID_NAME_ALIAS);
1820 }
1821
1822 static struct samr_displayentry *pdb_search_getentry(struct pdb_search *search,
1823                                                      uint32 idx)
1824 {
1825         if (idx < search->num_entries)
1826                 return &search->cache[idx];
1827
1828         if (search->search_ended)
1829                 return NULL;
1830
1831         while (idx >= search->num_entries) {
1832                 struct samr_displayentry entry;
1833
1834                 if (!search->next_entry(search, &entry)) {
1835                         search->search_end(search);
1836                         search->search_ended = True;
1837                         break;
1838                 }
1839
1840                 ADD_TO_LARGE_ARRAY(search, struct samr_displayentry,
1841                                    entry, &search->cache, &search->num_entries,
1842                                    &search->cache_size);
1843         }
1844
1845         return (search->num_entries > idx) ? &search->cache[idx] : NULL;
1846 }
1847
1848 struct pdb_search *pdb_search_users(TALLOC_CTX *mem_ctx, uint32 acct_flags)
1849 {
1850         struct pdb_methods *pdb = pdb_get_methods();
1851         struct pdb_search *result;
1852
1853         result = pdb_search_init(mem_ctx, PDB_USER_SEARCH);
1854         if (result == NULL) {
1855                 return NULL;
1856         }
1857
1858         if (!pdb->search_users(pdb, result, acct_flags)) {
1859                 TALLOC_FREE(result);
1860                 return NULL;
1861         }
1862         return result;
1863 }
1864
1865 struct pdb_search *pdb_search_groups(TALLOC_CTX *mem_ctx)
1866 {
1867         struct pdb_methods *pdb = pdb_get_methods();
1868         struct pdb_search *result;
1869
1870         result = pdb_search_init(mem_ctx, PDB_GROUP_SEARCH);
1871         if (result == NULL) {
1872                  return NULL;
1873         }
1874
1875         if (!pdb->search_groups(pdb, result)) {
1876                 TALLOC_FREE(result);
1877                 return NULL;
1878         }
1879         return result;
1880 }
1881
1882 struct pdb_search *pdb_search_aliases(TALLOC_CTX *mem_ctx, const DOM_SID *sid)
1883 {
1884         struct pdb_methods *pdb = pdb_get_methods();
1885         struct pdb_search *result;
1886
1887         if (pdb == NULL) return NULL;
1888
1889         result = pdb_search_init(mem_ctx, PDB_ALIAS_SEARCH);
1890         if (result == NULL) {
1891                 return NULL;
1892         }
1893
1894         if (!pdb->search_aliases(pdb, result, sid)) {
1895                 TALLOC_FREE(result);
1896                 return NULL;
1897         }
1898         return result;
1899 }
1900
1901 uint32 pdb_search_entries(struct pdb_search *search,
1902                           uint32 start_idx, uint32 max_entries,
1903                           struct samr_displayentry **result)
1904 {
1905         struct samr_displayentry *end_entry;
1906         uint32 end_idx = start_idx+max_entries-1;
1907
1908         /* The first entry needs to be searched after the last. Otherwise the
1909          * first entry might have moved due to a realloc during the search for
1910          * the last entry. */
1911
1912         end_entry = pdb_search_getentry(search, end_idx);
1913         *result = pdb_search_getentry(search, start_idx);
1914
1915         if (end_entry != NULL)
1916                 return max_entries;
1917
1918         if (start_idx >= search->num_entries)
1919                 return 0;
1920
1921         return search->num_entries - start_idx;
1922 }
1923
1924 /*******************************************************************
1925  trustdom methods
1926  *******************************************************************/
1927
1928 bool pdb_get_trusteddom_pw(const char *domain, char** pwd, DOM_SID *sid, 
1929                            time_t *pass_last_set_time)
1930 {
1931         struct pdb_methods *pdb = pdb_get_methods();
1932         return pdb->get_trusteddom_pw(pdb, domain, pwd, sid, 
1933                         pass_last_set_time);
1934 }
1935
1936 bool pdb_set_trusteddom_pw(const char* domain, const char* pwd,
1937                            const DOM_SID *sid)
1938 {
1939         struct pdb_methods *pdb = pdb_get_methods();
1940         return pdb->set_trusteddom_pw(pdb, domain, pwd, sid);
1941 }
1942
1943 bool pdb_del_trusteddom_pw(const char *domain)
1944 {
1945         struct pdb_methods *pdb = pdb_get_methods();
1946         return pdb->del_trusteddom_pw(pdb, domain);
1947 }
1948
1949 NTSTATUS pdb_enum_trusteddoms(TALLOC_CTX *mem_ctx, uint32 *num_domains,
1950                               struct trustdom_info ***domains)
1951 {
1952         struct pdb_methods *pdb = pdb_get_methods();
1953         return pdb->enum_trusteddoms(pdb, mem_ctx, num_domains, domains);
1954 }
1955
1956 /*******************************************************************
1957  the defaults for trustdom methods: 
1958  these simply call the original passdb/secrets.c actions,
1959  to be replaced by pdb_ldap.
1960  *******************************************************************/
1961
1962 static bool pdb_default_get_trusteddom_pw(struct pdb_methods *methods,
1963                                           const char *domain, 
1964                                           char** pwd, 
1965                                           DOM_SID *sid, 
1966                                           time_t *pass_last_set_time)
1967 {
1968         return secrets_fetch_trusted_domain_password(domain, pwd,
1969                                 sid, pass_last_set_time);
1970
1971 }
1972
1973 static bool pdb_default_set_trusteddom_pw(struct pdb_methods *methods, 
1974                                           const char* domain, 
1975                                           const char* pwd,
1976                                           const DOM_SID *sid)
1977 {
1978         return secrets_store_trusted_domain_password(domain, pwd, sid);
1979 }
1980
1981 static bool pdb_default_del_trusteddom_pw(struct pdb_methods *methods, 
1982                                           const char *domain)
1983 {
1984         return trusted_domain_password_delete(domain);
1985 }
1986
1987 static NTSTATUS pdb_default_enum_trusteddoms(struct pdb_methods *methods,
1988                                              TALLOC_CTX *mem_ctx, 
1989                                              uint32 *num_domains,
1990                                              struct trustdom_info ***domains)
1991 {
1992         return secrets_trusted_domains(mem_ctx, num_domains, domains);
1993 }
1994
1995 /*******************************************************************
1996  Create a pdb_methods structure and initialize it with the default
1997  operations.  In this way a passdb module can simply implement
1998  the functionality it cares about.  However, normally this is done 
1999  in groups of related functions.
2000 *******************************************************************/
2001
2002 NTSTATUS make_pdb_method( struct pdb_methods **methods ) 
2003 {
2004         /* allocate memory for the structure as its own talloc CTX */
2005
2006         *methods = talloc_zero(talloc_autofree_context(), struct pdb_methods);
2007         if (*methods == NULL) {
2008                 return NT_STATUS_NO_MEMORY;
2009         }
2010
2011         (*methods)->getsampwnam = pdb_default_getsampwnam;
2012         (*methods)->getsampwsid = pdb_default_getsampwsid;
2013         (*methods)->create_user = pdb_default_create_user;
2014         (*methods)->delete_user = pdb_default_delete_user;
2015         (*methods)->add_sam_account = pdb_default_add_sam_account;
2016         (*methods)->update_sam_account = pdb_default_update_sam_account;
2017         (*methods)->delete_sam_account = pdb_default_delete_sam_account;
2018         (*methods)->rename_sam_account = pdb_default_rename_sam_account;
2019         (*methods)->update_login_attempts = pdb_default_update_login_attempts;
2020
2021         (*methods)->getgrsid = pdb_default_getgrsid;
2022         (*methods)->getgrgid = pdb_default_getgrgid;
2023         (*methods)->getgrnam = pdb_default_getgrnam;
2024         (*methods)->create_dom_group = pdb_default_create_dom_group;
2025         (*methods)->delete_dom_group = pdb_default_delete_dom_group;
2026         (*methods)->add_group_mapping_entry = pdb_default_add_group_mapping_entry;
2027         (*methods)->update_group_mapping_entry = pdb_default_update_group_mapping_entry;
2028         (*methods)->delete_group_mapping_entry = pdb_default_delete_group_mapping_entry;
2029         (*methods)->enum_group_mapping = pdb_default_enum_group_mapping;
2030         (*methods)->enum_group_members = pdb_default_enum_group_members;
2031         (*methods)->enum_group_memberships = pdb_default_enum_group_memberships;
2032         (*methods)->set_unix_primary_group = pdb_default_set_unix_primary_group;
2033         (*methods)->add_groupmem = pdb_default_add_groupmem;
2034         (*methods)->del_groupmem = pdb_default_del_groupmem;
2035         (*methods)->create_alias = pdb_default_create_alias;
2036         (*methods)->delete_alias = pdb_default_delete_alias;
2037         (*methods)->get_aliasinfo = pdb_default_get_aliasinfo;
2038         (*methods)->set_aliasinfo = pdb_default_set_aliasinfo;
2039         (*methods)->add_aliasmem = pdb_default_add_aliasmem;
2040         (*methods)->del_aliasmem = pdb_default_del_aliasmem;
2041         (*methods)->enum_aliasmem = pdb_default_enum_aliasmem;
2042         (*methods)->enum_alias_memberships = pdb_default_alias_memberships;
2043         (*methods)->lookup_rids = pdb_default_lookup_rids;
2044         (*methods)->get_account_policy = pdb_default_get_account_policy;
2045         (*methods)->set_account_policy = pdb_default_set_account_policy;
2046         (*methods)->get_seq_num = pdb_default_get_seq_num;
2047         (*methods)->uid_to_rid = pdb_default_uid_to_rid;
2048         (*methods)->uid_to_sid = pdb_default_uid_to_sid;
2049         (*methods)->gid_to_sid = pdb_default_gid_to_sid;
2050         (*methods)->sid_to_id = pdb_default_sid_to_id;
2051
2052         (*methods)->search_groups = pdb_default_search_groups;
2053         (*methods)->search_aliases = pdb_default_search_aliases;
2054
2055         (*methods)->get_trusteddom_pw = pdb_default_get_trusteddom_pw;
2056         (*methods)->set_trusteddom_pw = pdb_default_set_trusteddom_pw;
2057         (*methods)->del_trusteddom_pw = pdb_default_del_trusteddom_pw;
2058         (*methods)->enum_trusteddoms  = pdb_default_enum_trusteddoms;
2059
2060         return NT_STATUS_OK;
2061 }