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r20216: Fix fallback code.
[Samba.git] / source / nsswitch / idmap.c
blobe2d2712f48996672e5af3d417f6beef41bbcaa9e
1 /*
2 Unix SMB/CIFS implementation.
3 ID Mapping
4 Copyright (C) Tim Potter 2000
5 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
6 Copyright (C) Simo Sorce 2003
7 Copyright (C) Jeremy Allison 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 #include "includes.h"
24 #include "winbindd.h"
25
26 #undef DBGC_CLASS
27 #define DBGC_CLASS DBGC_IDMAP
28
29 static_decl_idmap;
30
31 struct idmap_backend {
32 const char *name;
33 struct idmap_methods *methods;
34 struct idmap_backend *prev, *next;
35 };
36
37 struct idmap_alloc_backend {
38 const char *name;
39 struct idmap_alloc_methods *methods;
40 struct idmap_alloc_backend *prev, *next;
41 };
42
43 struct idmap_cache_ctx;
44
45 static TALLOC_CTX *idmap_ctx = NULL;
46 static struct idmap_cache_ctx *idmap_cache;
47
48 static struct idmap_backend *backends = NULL;
49 static struct idmap_domain **idmap_domains = NULL;
50 static int num_domains = 0;
51 static int pdb_dom_num = -1;
52 static int def_dom_num = -1;
53
54 static struct idmap_alloc_backend *alloc_backends = NULL;
55 static struct idmap_alloc_methods *alloc_methods = NULL;
56
57 #define IDMAP_CHECK_RET(ret) do { if ( ! NT_STATUS_IS_OK(ret)) { DEBUG(2, ("ERROR: NTSTATUS = 0x%08x\n", NT_STATUS_V(ret))); goto done; } } while(0)
58 #define IDMAP_CHECK_ALLOC(mem) do { if (!mem) { DEBUG(0, ("Out of memory!\n")); ret = NT_STATUS_NO_MEMORY; goto done; } } while(0)
59
60 static struct idmap_methods *get_methods(struct idmap_backend *be, const char *name)
61 {
62 struct idmap_backend *b;
63
64 for (b = be; b; b = b->next) {
65 if (strequal(b->name, name)) {
66 return b->methods;
67 }
68 }
69
70 return NULL;
71 }
72
73 static struct idmap_alloc_methods *get_alloc_methods(struct idmap_alloc_backend *be, const char *name)
74 {
75 struct idmap_alloc_backend *b;
76
77 for (b = be; b; b = b->next) {
78 if (strequal(b->name, name)) {
79 return b->methods;
80 }
81 }
82
83 return NULL;
84 }
85
86 /**********************************************************************
87 Allow a module to register itself as a method.
88 **********************************************************************/
89
90 NTSTATUS smb_register_idmap(int version, const char *name, struct idmap_methods *methods)
91 {
92 struct idmap_methods *test;
93 struct idmap_backend *entry;
94
95 if (!idmap_ctx) {
96 return NT_STATUS_INTERNAL_DB_ERROR;
97 }
98
99 if ((version != SMB_IDMAP_INTERFACE_VERSION)) {
100 DEBUG(0, ("Failed to register idmap module.\n"
101 "The module was compiled against SMB_IDMAP_INTERFACE_VERSION %d,\n"
102 "current SMB_IDMAP_INTERFACE_VERSION is %d.\n"
103 "Please recompile against the current version of samba!\n",
104 version, SMB_IDMAP_INTERFACE_VERSION));
105 return NT_STATUS_OBJECT_TYPE_MISMATCH;
106 }
107
108 if (!name || !name[0] || !methods) {
109 DEBUG(0,("Called with NULL pointer or empty name!\n"));
110 return NT_STATUS_INVALID_PARAMETER;
111 }
112
113 test = get_methods(backends, name);
114 if (test) {
115 DEBUG(0,("Idmap module %s already registered!\n", name));
116 return NT_STATUS_OBJECT_NAME_COLLISION;
117 }
118
119 entry = talloc(idmap_ctx, struct idmap_backend);
120 if ( ! entry) {
121 DEBUG(0,("Out of memory!\n"));
122 return NT_STATUS_NO_MEMORY;
123 }
124 entry->name = talloc_strdup(idmap_ctx, name);
125 if ( ! entry->name) {
126 DEBUG(0,("Out of memory!\n"));
127 return NT_STATUS_NO_MEMORY;
128 }
129 entry->methods = methods;
130
131 DLIST_ADD(backends, entry);
132 DEBUG(5, ("Successfully added idmap backend '%s'\n", name));
133 return NT_STATUS_OK;
134 }
135
136 /**********************************************************************
137 Allow a module to register itself as a method.
138 **********************************************************************/
139
140 NTSTATUS smb_register_idmap_alloc(int version, const char *name, struct idmap_alloc_methods *methods)
141 {
142 struct idmap_alloc_methods *test;
143 struct idmap_alloc_backend *entry;
144
145 if (!idmap_ctx) {
146 return NT_STATUS_INTERNAL_DB_ERROR;
147 }
148
149 if ((version != SMB_IDMAP_INTERFACE_VERSION)) {
150 DEBUG(0, ("Failed to register idmap alloc module.\n"
151 "The module was compiled against SMB_IDMAP_INTERFACE_VERSION %d,\n"
152 "current SMB_IDMAP_INTERFACE_VERSION is %d.\n"
153 "Please recompile against the current version of samba!\n",
154 version, SMB_IDMAP_INTERFACE_VERSION));
155 return NT_STATUS_OBJECT_TYPE_MISMATCH;
156 }
157
158 if (!name || !name[0] || !methods) {
159 DEBUG(0,("Called with NULL pointer or empty name!\n"));
160 return NT_STATUS_INVALID_PARAMETER;
161 }
162
163 test = get_alloc_methods(alloc_backends, name);
164 if (test) {
165 DEBUG(0,("idmap_alloc module %s already registered!\n", name));
166 return NT_STATUS_OBJECT_NAME_COLLISION;
167 }
168
169 entry = talloc(idmap_ctx, struct idmap_alloc_backend);
170 if ( ! entry) {
171 DEBUG(0,("Out of memory!\n"));
172 return NT_STATUS_NO_MEMORY;
173 }
174 entry->name = talloc_strdup(idmap_ctx, name);
175 if ( ! entry->name) {
176 DEBUG(0,("Out of memory!\n"));
177 return NT_STATUS_NO_MEMORY;
178 }
179 entry->methods = methods;
180
181 DLIST_ADD(alloc_backends, entry);
182 DEBUG(5, ("Successfully added idmap alloc backend '%s'\n", name));
183 return NT_STATUS_OK;
184 }
185
186 static int close_domain_destructor(struct idmap_domain *dom)
187 {
188 NTSTATUS ret;
189
190 ret = dom->methods->close_fn(dom);
191 if (!NT_STATUS_IS_OK(ret)) {
192 DEBUG(3, ("Failed to close idmap domain [%s]!\n", dom->name));
193 }
194
195 return 0;
196 }
197
198 /**************************************************************************
199 Shutdown.
200 **************************************************************************/
201
202 NTSTATUS idmap_close(void)
203 {
204 /* close the alloc backend first before freeing idmap_ctx */
205 if (alloc_methods) {
206 alloc_methods->close_fn();
207 alloc_methods = NULL;
208 }
209 alloc_backends = NULL;
210
211 /* this talloc_free call will fire the talloc destructors
212 * that will free all active backends resources */
213 TALLOC_FREE(idmap_ctx);
214 idmap_cache = NULL;
215 idmap_domains = NULL;
216 backends = NULL;
217
218 return NT_STATUS_OK;
219 }
220
221 /**********************************************************************
222 Initialise idmap cache and a remote backend (if configured).
223 **********************************************************************/
224
225 static const char *idmap_default_domain[] = { "default domain", NULL };
226
227 NTSTATUS idmap_init(void)
228 {
229 NTSTATUS ret;
230 struct idmap_domain *dom;
231 const char *compat_backend = NULL;
232 const char *compat_params = NULL;
233 const char **dom_list = NULL;
234 char *alloc_backend;
235 BOOL default_already_defined = False;
236 BOOL pri_dom_is_in_list = False;
237 int compat = 0;
238 int i;
239
240 if (idmap_ctx) {
241 return NT_STATUS_OK;
242 }
243
244 idmap_ctx = talloc_named_const(NULL, 0, "IDMAP MEMORY CONTEXT");
245 if ( ! idmap_ctx) {
246 return NT_STATUS_NO_MEMORY;
247 }
248
249 /* init cache */
250 idmap_cache = idmap_cache_init(idmap_ctx);
251 if ( ! idmap_cache) {
252 return NT_STATUS_UNSUCCESSFUL;
253 }
254
255 /* register static backends */
256 static_init_idmap;
257
258 if ((dom_list = lp_idmap_domains()) != NULL) {
259 if (lp_idmap_backend()) {
260 DEBUG(0, ("WARNING: idmap backend and idmap domains are mutually excusive!\n"));
261 DEBUGADD(0, (" idmap backend option will be IGNORED!\n"));
262 }
263
264 } else if (lp_idmap_backend()) {
265 const char **compat_list = lp_idmap_backend();
266 const char *p;
267
268 DEBUG(0, ("WARNING: idmap backend is deprecated!\n"));
269 compat = 1;
270
271 /* strip any leading idmap_ prefix of */
272 if (strncmp(*compat_list, "idmap_", 6) == 0 ) {
273 p = *compat_list += 6;
274 DEBUG(0, ("WARNING: idmap backend uses obsolete and deprecated 'idmap_' prefix.\n"));
275 DEBUGADD(0, (" Please replace 'idmap_%s' by '%s' in %s\n", p, p, dyn_CONFIGFILE));
276 compat_backend = p;
277 } else {
278 compat_backend = *compat_list;
279 }
280
281 if ((p = strchr(compat_backend, ':')) != NULL) {
282 compat_params = p + 1;
283 }
284 }
285
286 if ( ! dom_list) {
287 dom_list = idmap_default_domain;
288 }
289
290 /***************************
291 * initialize idmap domains
292 */
293 DEBUG(1, ("Initializing idmap domains\n"));
294
295 for (i = 0; dom_list[i]; i++) {
296 const char *parm_backend;
297 char *config_option;
298
299 if (strequal(dom_list[i], lp_workgroup())) {
300 pri_dom_is_in_list = True;
301 }
302 /* init domain */
303
304 dom = talloc_zero(idmap_ctx, struct idmap_domain);
305 IDMAP_CHECK_ALLOC(dom);
306
307 dom->name = talloc_strdup(dom, dom_list[i]);
308 IDMAP_CHECK_ALLOC(dom->name);
309
310 config_option = talloc_asprintf(dom, "idmap config %s", dom->name);
311 IDMAP_CHECK_ALLOC(config_option);
312
313 /* default or specific ? */
314
315 dom->default_domain = lp_parm_bool(-1, config_option, "default", False);
316 if (dom->default_domain ||
317 strequal(dom_list[i], idmap_default_domain[0])) {
318 /* the default domain is a cacth all domain
319 * so no specific domain sid is provided */
320 dom->sid = NULL;
321 /* make sure this is set even when we match idmap_default_domain[0] */
322 dom->default_domain = True;
323
324 if (lp_parm_const_string(-1, config_option, "domain sid", NULL)) {
325 DEBUG(1, ("WARNING: Can't force a /domain sid/ on the DEFAULT domain, Ignoring!"));
326 }
327
328 /* only one default domain is permitted */
329 if (default_already_defined) {
330 DEBUG(1, ("ERROR: Multiple domains defined as default!\n"));
331 ret = NT_STATUS_INVALID_PARAMETER;
332 goto done;
333 }
334
335 default_already_defined = True;
336
337 } else {
338 const char *sid;
339
340 sid = lp_parm_const_string(-1, config_option, "domain sid", NULL);
341 if (sid) {
342 dom->sid = string_sid_talloc(dom, sid);
343 } else {
344 struct winbindd_domain *wdom = find_domain_from_name(dom->name);
345 if (wdom) {
346 dom->sid = sid_dup_talloc(dom, &wdom->sid);
347 IDMAP_CHECK_ALLOC(dom->sid);
348 }
349 }
350
351 if ( ! dom->sid) {
352 DEBUG(1, ("ERROR: Could not find DOMAIN SID for domain %s\n", dom->name));
353 DEBUGADD(1, (" Consider to set explicitly the /domain sid/ option\n"));
354 ret = NT_STATUS_NO_SUCH_DOMAIN;
355 goto done;
356 }
357 }
358
359 /* is this a readonly domain ? */
360 dom->readonly = lp_parm_bool(-1, config_option, "readonly", False);
361
362 /* find associated backend (default: tdb) */
363 if (compat) {
364 parm_backend = talloc_strdup(idmap_ctx, compat_backend);
365 } else {
366 parm_backend =
367 talloc_strdup(idmap_ctx,
368 lp_parm_const_string(-1, config_option, "backend", "tdb"));
369 }
370 IDMAP_CHECK_ALLOC(parm_backend);
371
372 /* get the backend methods for this domain */
373 dom->methods = get_methods(backends, parm_backend);
374
375 if ( ! dom->methods) {
376 ret = smb_probe_module("idmap", parm_backend);
377 if (NT_STATUS_IS_OK(ret)) {
378 dom->methods = get_methods(backends, parm_backend);
379 }
380 }
381 if ( ! dom->methods) {
382 DEBUG(0, ("ERROR: Could not get methods for backend %s\n", parm_backend));
383 ret = NT_STATUS_UNSUCCESSFUL;
384 goto done;
385 }
386
387 /* check the set_mapping function exists otherwise mark the module as readonly */
388 if ( ! dom->methods->set_mapping) {
389 dom->readonly = True;
390 }
391
392 /* now that we have methods, set the destructor for this domain */
393 talloc_set_destructor(dom, close_domain_destructor);
394
395 /* Finally instance a backend copy for this domain */
396 ret = dom->methods->init(dom, compat_params);
397 if ( ! NT_STATUS_IS_OK(ret)) {
398 DEBUG(0, ("ERROR: Initialization failed for backend %s (domain %s)\n",
399 parm_backend, dom->name));
400 ret = NT_STATUS_UNSUCCESSFUL;
401 goto done;
402 }
403 idmap_domains = talloc_realloc(idmap_ctx, idmap_domains, struct idmap_domain *, i+1);
404 if ( ! idmap_domains) {
405 DEBUG(0, ("Out of memory!\n"));
406 ret = NT_STATUS_NO_MEMORY;
407 goto done;
408 }
409 idmap_domains[i] = dom;
410
411 if (dom->default_domain) { /* save default domain position for future uses */
412 def_dom_num = i;
413 }
414
415 DEBUG(10, ("Domain %s - Sid %s - Backend %s - %sdefault - %sreadonly\n",
416 dom->name, sid_string_static(dom->sid), parm_backend,
417 dom->default_domain?"":"not ", dom->readonly?"":"not "));
418
419 talloc_free(config_option);
420 }
421
422 /* save the number of domains we have */
423 num_domains = i;
424
425 /* automatically add idmap_nss backend if needed */
426 if ((lp_server_role() == ROLE_DOMAIN_MEMBER) &&
427 ( ! pri_dom_is_in_list) &&
428 lp_winbind_trusted_domains_only()) {
429 DOM_SID our_sid;
430
431 if (!secrets_fetch_domain_sid(lp_workgroup(), &our_sid)) {
432 DEBUG(0, ("Could not fetch our SID - did we join?\n"));
433 ret = NT_STATUS_UNSUCCESSFUL;
434 goto done;
435 }
436
437 dom = talloc_zero(idmap_ctx, struct idmap_domain);
438 IDMAP_CHECK_ALLOC(dom);
439
440 dom->name = talloc_strdup(dom, lp_workgroup());
441 IDMAP_CHECK_ALLOC(dom->name);
442
443 dom->default_domain = False;
444 dom->readonly = True;
445
446 dom->sid = sid_dup_talloc(dom, &our_sid);
447 IDMAP_CHECK_ALLOC(dom->sid);
448
449 /* get the backend methods for passdb */
450 dom->methods = get_methods(backends, "nss");
451
452 /* (the nss module is always statically linked) */
453 if ( ! dom->methods) {
454 DEBUG(0, ("ERROR: Could not get methods for idmap_nss ?!\n"));
455 ret = NT_STATUS_UNSUCCESSFUL;
456 goto done;
457 }
458
459 /* now that we have methods, set the destructor for this domain */
460 talloc_set_destructor(dom, close_domain_destructor);
461
462 /* Finally instance a backend copy for this domain */
463 ret = dom->methods->init(dom, compat_params);
464 if ( ! NT_STATUS_IS_OK(ret)) {
465 DEBUG(0, ("ERROR: Initialization failed for idmap_nss ?!\n"));
466 ret = NT_STATUS_UNSUCCESSFUL;
467 goto done;
468 }
469
470 idmap_domains = talloc_realloc(idmap_ctx, idmap_domains, struct idmap_domain *, num_domains+1);
471 if ( ! idmap_domains) {
472 DEBUG(0, ("Out of memory!\n"));
473 ret = NT_STATUS_NO_MEMORY;
474 goto done;
475 }
476 idmap_domains[num_domains] = dom;
477
478 DEBUG(10, ("Domain %s - Sid %s - Backend nss - not default - readonly\n",
479 dom->name, sid_string_static(dom->sid)));
480
481 num_domains++;
482 }
483
484 /**** automatically add idmap_passdb backend ****/
485 dom = talloc_zero(idmap_ctx, struct idmap_domain);
486 IDMAP_CHECK_ALLOC(dom);
487
488 dom->name = talloc_strdup(dom, get_global_sam_name());
489 IDMAP_CHECK_ALLOC(dom->name);
490
491 dom->default_domain = False;
492 dom->readonly = True;
493
494 dom->sid = sid_dup_talloc(dom, get_global_sam_sid());
495 IDMAP_CHECK_ALLOC(dom->sid);
496
497 /* get the backend methods for passdb */
498 dom->methods = get_methods(backends, "passdb");
499
500 /* (the passdb module is always statically linked) */
501 if ( ! dom->methods) {
502 DEBUG(0, ("ERROR: Could not get methods for idmap_passdb ?!\n"));
503 ret = NT_STATUS_UNSUCCESSFUL;
504 goto done;
505 }
506
507 /* now that we have methods, set the destructor for this domain */
508 talloc_set_destructor(dom, close_domain_destructor);
509
510 /* Finally instance a backend copy for this domain */
511 ret = dom->methods->init(dom, compat_params);
512 if ( ! NT_STATUS_IS_OK(ret)) {
513 DEBUG(0, ("ERROR: Initialization failed for idmap_passdb ?!\n"));
514 ret = NT_STATUS_UNSUCCESSFUL;
515 goto done;
516 }
517
518 idmap_domains = talloc_realloc(idmap_ctx, idmap_domains, struct idmap_domain *, num_domains+1);
519 if ( ! idmap_domains) {
520 DEBUG(0, ("Out of memory!\n"));
521 ret = NT_STATUS_NO_MEMORY;
522 goto done;
523 }
524 idmap_domains[num_domains] = dom;
525
526 /* needed to handle special BUILTIN and wellknown SIDs cases */
527 pdb_dom_num = num_domains;
528
529 DEBUG(10, ("Domain %s - Sid %s - Backend passdb - not default - readonly\n",
530 dom->name, sid_string_static(dom->sid)));
531 DEBUGADD(10, (" (special: includes handling BUILTIN and Wellknown SIDs as well)\n"));
532
533 num_domains++;
534 /**** finished adding idmap_passdb backend ****/
535
536 /* sort domains so that the default is the last one */
537 if (def_dom_num != num_domains-1) { /* default is not last, move it */
538 struct idmap_domain *tmp;
539
540 if (pdb_dom_num > def_dom_num) {
541 pdb_dom_num --;
542
543 } else if (pdb_dom_num == def_dom_num) { /* ?? */
544 pdb_dom_num = num_domains - 1;
545 }
546
547 tmp = idmap_domains[def_dom_num];
548
549 for (i = def_dom_num; i < num_domains-1; i++) {
550 idmap_domains[i] = idmap_domains[i+1];
551 }
552 idmap_domains[i] = tmp;
553 def_dom_num = i;
554 }
555
556
557 /***************************
558 * initialize alloc module
559 */
560 DEBUG(1, ("Initializing idmap alloc module\n"));
561
562 if (compat) {
563 alloc_backend = talloc_strdup(idmap_ctx, compat_backend);
564 } else {
565 char *ab = lp_idmap_alloc_backend();
566
567 if (ab && (ab[0] != '\0')) {
568 alloc_backend = talloc_strdup(idmap_ctx, lp_idmap_alloc_backend());
569 } else {
570 alloc_backend = talloc_strdup(idmap_ctx, "tdb");
571 }
572 }
573 IDMAP_CHECK_ALLOC(alloc_backend);
574
575 alloc_methods = get_alloc_methods(alloc_backends, alloc_backend);
576 if ( ! alloc_methods) {
577 ret = smb_probe_module("idmap", alloc_backend);
578 if (NT_STATUS_IS_OK(ret)) {
579 alloc_methods = get_alloc_methods(alloc_backends, alloc_backend);
580 }
581 }
582 if ( ! alloc_methods) {
583 DEBUG(0, ("ERROR: Could not get methods for alloc backend %s\n", alloc_backend));
584 ret = NT_STATUS_UNSUCCESSFUL;
585 goto done;
586 }
587
588 ret = alloc_methods->init(compat_params);
589 if ( ! NT_STATUS_IS_OK(ret)) {
590 DEBUG(0, ("ERROR: Initialization failed for alloc backend %s\n", alloc_backend));
591 ret = NT_STATUS_UNSUCCESSFUL;
592 goto done;
593 }
594
595 return NT_STATUS_OK;
596
597 done:
598 DEBUG(0, ("Aborting IDMAP Initialization ...\n"));
599 idmap_close();
600 return ret;
601 }
602
603 /**************************************************************************
604 idmap allocator interface functions
605 **************************************************************************/
606
607 NTSTATUS idmap_allocate_uid(struct unixid *id)
608 {
609 NTSTATUS ret;
610
611 if (! NT_STATUS_IS_OK(ret = idmap_init())) {
612 return ret;
613 }
614
615 id->type = ID_TYPE_UID;
616 return alloc_methods->allocate_id(id);
617 }
618
619 NTSTATUS idmap_allocate_gid(struct unixid *id)
620 {
621 NTSTATUS ret;
622
623 if (! NT_STATUS_IS_OK(ret = idmap_init())) {
624 return ret;
625 }
626
627 id->type = ID_TYPE_GID;
628 return alloc_methods->allocate_id(id);
629 }
630
631 NTSTATUS idmap_set_uid_hwm(struct unixid *id)
632 {
633 NTSTATUS ret;
634
635 if (! NT_STATUS_IS_OK(ret = idmap_init())) {
636 return ret;
637 }
638
639 id->type = ID_TYPE_UID;
640 return alloc_methods->set_id_hwm(id);
641 }
642
643 NTSTATUS idmap_set_gid_hwm(struct unixid *id)
644 {
645 NTSTATUS ret;
646
647 if (! NT_STATUS_IS_OK(ret = idmap_init())) {
648 return ret;
649 }
650
651 id->type = ID_TYPE_GID;
652 return alloc_methods->set_id_hwm(id);
653 }
654
655 /*********************************************************
656 Check if creating a mapping is permitted for the domain
657 *********************************************************/
658
659 static NTSTATUS idmap_can_map(const struct id_map *map, struct idmap_domain **ret_dom)
660 {
661 struct idmap_domain *dom;
662 int i;
663
664 /* Check we do not create mappings for our own local domain, or BUILTIN or special SIDs */
665 if ((sid_compare_domain(map->sid, get_global_sam_sid()) == 0) ||
666 sid_check_is_in_builtin(map->sid) ||
667 sid_check_is_in_wellknown_domain(map->sid)) {
668 DEBUG(10, ("We are not supposed to create mappings for our own domains (local, builtin, specials)\n"));
669 return NT_STATUS_UNSUCCESSFUL;
670 }
671
672 /* Special check for trusted domain only = Yes */
673 if (lp_winbind_trusted_domains_only()) {
674 struct winbindd_domain *wdom = find_our_domain();
675 if (wdom && (sid_compare_domain(map->sid, &wdom->sid) == 0)) {
676 DEBUG(10, ("We are not supposed to create mappings for our primary domain when <trusted domain only> is True\n"));
677 DEBUGADD(10, ("Leave [%s] unmapped\n", sid_string_static(map->sid)));
678 return NT_STATUS_UNSUCCESSFUL;
679 }
680 }
681
682 for (i = 0, dom = NULL; i < num_domains; i++) {
683 if ((idmap_domains[i]->default_domain) || /* ok set it into the default domain */
684 (sid_compare_domain(idmap_domains[i]->sid, map->sid) == 0)) { /* ok found a specific domain */
685 dom = idmap_domains[i];
686 break;
687 }
688 }
689
690 if (! dom) {
691 /* huh, couldn't find a suitable domain, let's just leave it unmapped */
692 DEBUG(10, ("Could not find imdap backend for SID %s", sid_string_static(map->sid)));
693 return NT_STATUS_NO_SUCH_DOMAIN;
694 }
695
696 if (dom->readonly) {
697 /* ouch the domain is read only, let's just leave it unmapped */
698 DEBUG(10, ("imdap backend for SID %s is READONLY!\n", sid_string_static(map->sid)));
699 return NT_STATUS_UNSUCCESSFUL;
700 }
701
702 *ret_dom = dom;
703 return NT_STATUS_OK;
704 }
705
706 static NTSTATUS idmap_new_mapping(TALLOC_CTX *ctx, struct id_map *map)
707 {
708 NTSTATUS ret;
709 struct idmap_domain *dom;
710 char *domname, *name;
711 enum lsa_SidType sid_type;
712
713 ret = idmap_can_map(map, &dom);
714 if ( ! NT_STATUS_IS_OK(ret)) {
715 return NT_STATUS_NONE_MAPPED;
716 }
717
718 /* check if this is a valid SID and then map it */
719 if (winbindd_lookup_name_by_sid(ctx, map->sid, &domname, &name, &sid_type)) {
720 switch (sid_type) {
721 case SID_NAME_USER:
722 ret = idmap_allocate_uid(&map->xid);
723 if ( ! NT_STATUS_IS_OK(ret)) {
724 /* can't allocate id, let's just leave it unmapped */
725 DEBUG(2, ("uid allocation failed! Can't create mapping\n"));
726 return NT_STATUS_NONE_MAPPED;
727 }
728 break;
729 case SID_NAME_DOM_GRP:
730 case SID_NAME_ALIAS:
731 case SID_NAME_WKN_GRP:
732 ret = idmap_allocate_gid(&map->xid);
733 if ( ! NT_STATUS_IS_OK(ret)) {
734 /* can't allocate id, let's just leave it unmapped */
735 DEBUG(2, ("gid allocation failed! Can't create mapping\n"));
736 return NT_STATUS_NONE_MAPPED;
737 }
738 break;
739 default:
740 /* invalid sid, let's just leave it unmapped */
741 DEBUG(10, ("SID %s is UNKNOWN, skip mapping\n", sid_string_static(map->sid)));
742 return NT_STATUS_NONE_MAPPED;
743 }
744
745 /* ok, got a new id, let's set a mapping */
746 map->mapped = True;
747
748 DEBUG(10, ("Setting mapping: %s <-> %s %lu\n",
749 sid_string_static(map->sid),
750 (map->xid.type == ID_TYPE_UID) ? "UID" : "GID",
751 (unsigned long)map->xid.id));
752 ret = dom->methods->set_mapping(dom, map);
753
754 if ( ! NT_STATUS_IS_OK(ret)) {
755 /* something wrong here :-( */
756 DEBUG(2, ("Failed to commit mapping\n!"));
757
758 /* TODO: would it make sense to have an "unalloc_id function?" */
759
760 return NT_STATUS_NONE_MAPPED;
761 }
762 } else {
763 DEBUG(2,("Invalid SID, not mapping %s (type %d)\n",
764 sid_string_static(map->sid), sid_type));
765 return NT_STATUS_NONE_MAPPED;
766 }
767
768 return NT_STATUS_OK;
769 }
770
771 static NTSTATUS idmap_backends_set_mapping(const struct id_map *map)
772 {
773 struct idmap_domain *dom;
774 NTSTATUS ret;
775
776 DEBUG(10, ("Setting mapping %s <-> %s %lu\n",
777 sid_string_static(map->sid),
778 (map->xid.type == ID_TYPE_UID) ? "UID" : "GID",
779 (unsigned long)map->xid.id));
780
781 ret = idmap_can_map(map, &dom);
782 if ( ! NT_STATUS_IS_OK(ret)) {
783 return ret;
784 }
785
786 DEBUG(10, ("set_mapping for domain %s(%s)\n", dom->name, sid_string_static(dom->sid)));
787
788 return dom->methods->set_mapping(dom, map);
789 }
790
791 static NTSTATUS idmap_backends_unixids_to_sids(struct id_map **ids)
792 {
793 struct idmap_domain *dom;
794 struct id_map **unmapped;
795 struct id_map **_ids;
796 TALLOC_CTX *ctx;
797 NTSTATUS ret;
798 int i, u, n;
799
800 if (!ids || !*ids) {
801 DEBUG(1, ("Invalid list of maps\n"));
802 return NT_STATUS_INVALID_PARAMETER;
803 }
804
805 ctx = talloc_named_const(NULL, 0, "idmap_backends_unixids_to_sids ctx");
806 if ( ! ctx) {
807 DEBUG(0, ("Out of memory!\n"));
808 return NT_STATUS_NO_MEMORY;
809 }
810
811 DEBUG(10, ("Query backends to map ids->sids\n"));
812
813 /* start from the default (the last one) and then if there are still
814 * unmapped entries cycle through the others */
815
816 _ids = ids;
817
818 /* make sure all maps are marked as false */
819 for (i = 0; _ids[i]; i++) {
820 _ids[i]->mapped = False;
821 }
822
823 unmapped = NULL;
824 for (n = num_domains-1; n >= 0; n--) { /* cycle backwards */
825
826 dom = idmap_domains[n];
827
828 DEBUG(10, ("Query sids from domain %s(%s)\n", dom->name, sid_string_static(dom->sid)));
829
830 ret = dom->methods->unixids_to_sids(dom, _ids);
831 IDMAP_CHECK_RET(ret);
832
833 unmapped = NULL;
834
835 for (i = 0, u = 0; _ids[i]; i++) {
836 if (_ids[i]->mapped == False) {
837 unmapped = talloc_realloc(ctx, unmapped, struct id_map *, u + 2);
838 IDMAP_CHECK_ALLOC(unmapped);
839 unmapped[u] = _ids[i];
840 u++;
841 }
842 }
843 if (unmapped) {
844 /* terminate the unmapped list */
845 unmapped[u] = NULL;
846 } else { /* no more entries, get out */
847 break;
848 }
849
850 _ids = unmapped;
851
852 }
853
854 if (unmapped) {
855 /* there are still unmapped ids, map them to the unix users/groups domains */
856 for (i = 0; unmapped[i]; i++) {
857 switch (unmapped[i]->xid.type) {
858 case ID_TYPE_UID:
859 uid_to_unix_users_sid((uid_t)unmapped[i]->xid.id, unmapped[i]->sid);
860 unmapped[i]->mapped = True;
861 break;
862 case ID_TYPE_GID:
863 gid_to_unix_groups_sid((gid_t)unmapped[i]->xid.id, unmapped[i]->sid);
864 unmapped[i]->mapped = True;
865 break;
866 default: /* what?! */
867 unmapped[i]->mapped = False;
868 break;
869 }
870 }
871 }
872
873 ret = NT_STATUS_OK;
874
875 done:
876 talloc_free(ctx);
877 return ret;
878 }
879
880 static NTSTATUS idmap_backends_sids_to_unixids(struct id_map **ids)
881 {
882 struct id_map ***dom_ids;
883 struct idmap_domain *dom;
884 TALLOC_CTX *ctx;
885 NTSTATUS ret;
886 int i, *counters;
887
888 if (!ids || !*ids) {
889 DEBUG(1, ("Invalid list of maps\n"));
890 return NT_STATUS_INVALID_PARAMETER;
891 }
892
893 ctx = talloc_named_const(NULL, 0, "idmap_backends_sids_to_unixids ctx");
894 if ( ! ctx) {
895 DEBUG(1, ("failed to allocate talloc context, OOM?\n"));
896 return NT_STATUS_NO_MEMORY;
897 }
898
899 DEBUG(10, ("Query backends to map sids->ids\n"));
900
901 /* split list per domain */
902 dom_ids = talloc_zero_array(ctx, struct id_map **, num_domains);
903 IDMAP_CHECK_ALLOC(dom_ids);
904 counters = talloc_zero_array(ctx, int, num_domains);
905
906 for (i = 0; ids[i]; i++) {
907 int dom_num;
908
909 /* make sure they are unmapped by default */
910 ids[i]->mapped = False;
911
912 for (dom_num = 0, dom = NULL; dom_num < num_domains; dom_num++) {
913 if (idmap_domains[dom_num]->default_domain) {
914 /* we got to the default domain */
915 dom = idmap_domains[dom_num];
916 break;
917 }
918 if (sid_compare_domain(idmap_domains[dom_num]->sid, ids[i]->sid) == 0) {
919 dom = idmap_domains[dom_num];
920 break;
921 }
922 }
923 if (( ! dom) || dom->default_domain) {
924 /* handle BUILTIN or Special SIDs
925 * and prevent them from falling into the default domain space */
926 if ((sid_check_is_in_builtin(ids[i]->sid) ||
927 sid_check_is_in_wellknown_domain(ids[i]->sid))) {
928
929 if (pdb_dom_num != -1) {
930 dom = idmap_domains[pdb_dom_num];
931 dom_num = pdb_dom_num;
932 } else {
933 dom = NULL;
934 }
935 }
936 }
937 if ( ! dom) {
938 /* no dom move on */
939 continue;
940 }
941
942 DEBUG(10, ("SID %s is being handled by %s(%d)\n",
943 sid_string_static(ids[i]->sid),
944 dom?dom->name:"none",
945 dom_num));
946
947 dom_ids[dom_num] = talloc_realloc(ctx, dom_ids[dom_num], struct id_map *, counters[dom_num] + 2);
948 IDMAP_CHECK_ALLOC(dom_ids[dom_num]);
949
950 dom_ids[dom_num][counters[dom_num]] = ids[i];
951 counters[dom_num]++;
952 dom_ids[dom_num][counters[dom_num]] = NULL;
953 }
954
955 /* ok all the ids have been dispatched in the right queues
956 * let's cycle through the filled ones */
957
958 for (i = 0; i < num_domains; i++) {
959 if (dom_ids[i]) { /* ok, we have ids in this one */
960 dom = idmap_domains[i];
961 DEBUG(10, ("Query ids from domain %s(%s)\n", dom->name, sid_string_static(dom->sid)));
962 ret = dom->methods->sids_to_unixids(dom, dom_ids[i]);
963 IDMAP_CHECK_RET(ret);
964 }
965 }
966
967 /* ok all the backends have been contacted at this point */
968 /* let's see if we have any unmapped SID left and act accordingly */
969
970 for (i = 0; ids[i]; i++) {
971 if ( ! ids[i]->mapped) { /* ok this is an unmapped one, see if we can map it */
972 ret = idmap_new_mapping(ctx, ids[i]);
973 if (NT_STATUS_IS_OK(ret)) {
974 /* successfully mapped */
975 ids[i]->mapped = True;
976 } else if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
977 /* could not map it */
978 ids[i]->mapped = False;
979 } else{
980 /* Something very bad happened down there */
981 goto done;
982 }
983 }
984 }
985
986 ret = NT_STATUS_OK;
987
988 done:
989 talloc_free(ctx);
990 return ret;
991 }
992
993 /**************************************************************************
994 idmap interface functions
995 **************************************************************************/
996
997 NTSTATUS idmap_unixids_to_sids(struct id_map **ids)
998 {
999 TALLOC_CTX *ctx;
1000 NTSTATUS ret;
1001 struct id_map **bids;
1002 int i, bi;
1003 int bn = 0;
1004
1005 if (! NT_STATUS_IS_OK(ret = idmap_init())) {
1006 return ret;
1007 }
1008
1009 if (!ids || !*ids) {
1010 DEBUG(1, ("Invalid list of maps\n"));
1011 return NT_STATUS_INVALID_PARAMETER;
1012 }
1013
1014 ctx = talloc_named_const(NULL, 0, "idmap_unixids_to_sids ctx");
1015 if ( ! ctx) {
1016 DEBUG(1, ("failed to allocate talloc context, OOM?\n"));
1017 return NT_STATUS_NO_MEMORY;
1018 }
1019
1020 /* no ids to be asked to the backends by default */
1021 bids = NULL;
1022 bi = 0;
1023
1024 for (i = 0; ids[i]; i++) {
1025
1026 if ( ! ids[i]->sid) {
1027 DEBUG(1, ("invalid null SID in id_map array"));
1028 talloc_free(ctx);
1029 return NT_STATUS_INVALID_PARAMETER;
1030 }
1031
1032 ret = idmap_cache_map_id(idmap_cache, ids[i]);
1033
1034 /* TODO: handle NT_STATUS_SYNCHRONIZATION_REQUIRED for disconnected mode */
1035
1036 if ( ! NT_STATUS_IS_OK(ret)) {
1037
1038 if ( ! bids) {
1039 /* alloc space for ids to be resolved by backends (realloc ten by ten) */
1040 bids = talloc_array(ctx, struct id_map *, 10);
1041 if ( ! bids) {
1042 DEBUG(1, ("Out of memory!\n"));
1043 talloc_free(ctx);
1044 return NT_STATUS_NO_MEMORY;
1045 }
1046 bn = 10;
1047 }
1048
1049 /* add this id to the ones to be retrieved from the backends */
1050 bids[bi] = ids[i];
1051 bi++;
1052
1053 /* check if we need to allocate new space on the rids array */
1054 if (bi == bn) {
1055 bn += 10;
1056 bids = talloc_realloc(ctx, bids, struct id_map *, bn);
1057 if ( ! bids) {
1058 DEBUG(1, ("Out of memory!\n"));
1059 talloc_free(ctx);
1060 return NT_STATUS_NO_MEMORY;
1061 }
1062 }
1063
1064 /* make sure the last element is NULL */
1065 bids[bi] = NULL;
1066 }
1067 }
1068
1069 /* let's see if there is any id mapping to be retieved from the backends */
1070 if (bi) {
1071 ret = idmap_backends_unixids_to_sids(bids);
1072 IDMAP_CHECK_RET(ret);
1073
1074 /* update the cache */
1075 for (i = 0; i < bi; i++) {
1076 if (bids[i]->mapped) {
1077 ret = idmap_cache_set(idmap_cache, bids[i]);
1078 } else {
1079 ret = idmap_cache_set_negative_id(idmap_cache, bids[i]);
1080 }
1081 IDMAP_CHECK_RET(ret);
1082 }
1083 }
1084
1085 ret = NT_STATUS_OK;
1086 done:
1087 talloc_free(ctx);
1088 return ret;
1089 }
1090
1091 NTSTATUS idmap_sids_to_unixids(struct id_map **ids)
1092 {
1093 TALLOC_CTX *ctx;
1094 NTSTATUS ret;
1095 struct id_map **bids;
1096 int i, bi;
1097 int bn = 0;
1098
1099 if (! NT_STATUS_IS_OK(ret = idmap_init())) {
1100 return ret;
1101 }
1102
1103 if (!ids || !*ids) {
1104 DEBUG(1, ("Invalid list of maps\n"));
1105 return NT_STATUS_INVALID_PARAMETER;
1106 }
1107
1108 ctx = talloc_named_const(NULL, 0, "idmap_sids_to_unixids ctx");
1109 if ( ! ctx) {
1110 DEBUG(1, ("failed to allocate talloc context, OOM?\n"));
1111 return NT_STATUS_NO_MEMORY;
1112 }
1113
1114 /* no ids to be asked to the backends by default */
1115 bids = NULL;
1116 bi = 0;
1117
1118 for (i = 0; ids[i]; i++) {
1119
1120 if ( ! ids[i]->sid) {
1121 DEBUG(1, ("invalid null SID in id_map array\n"));
1122 talloc_free(ctx);
1123 return NT_STATUS_INVALID_PARAMETER;
1124 }
1125
1126 ret = idmap_cache_map_sid(idmap_cache, ids[i]);
1127
1128 /* TODO: handle NT_STATUS_SYNCHRONIZATION_REQUIRED for disconnected mode */
1129
1130 if ( ! NT_STATUS_IS_OK(ret)) {
1131
1132 if ( ! bids) {
1133 /* alloc space for ids to be resolved by backends (realloc ten by ten) */
1134 bids = talloc_array(ctx, struct id_map *, 10);
1135 if ( ! bids) {
1136 DEBUG(1, ("Out of memory!\n"));
1137 talloc_free(ctx);
1138 return NT_STATUS_NO_MEMORY;
1139 }
1140 bn = 10;
1141 }
1142
1143 /* add this id to the ones to be retrieved from the backends */
1144 bids[bi] = ids[i];
1145 bi++;
1146
1147 /* check if we need to allocate new space on the ids array */
1148 if (bi == bn) {
1149 bn += 10;
1150 bids = talloc_realloc(ctx, bids, struct id_map *, bn);
1151 if ( ! bids) {
1152 DEBUG(1, ("Out of memory!\n"));
1153 talloc_free(ctx);
1154 return NT_STATUS_NO_MEMORY;
1155 }
1156 }
1157
1158 /* make sure the last element is NULL */
1159 bids[bi] = NULL;
1160 }
1161 }
1162
1163 /* let's see if there is any id mapping to be retieved from the backends */
1164 if (bids) {
1165 ret = idmap_backends_sids_to_unixids(bids);
1166 IDMAP_CHECK_RET(ret);
1167
1168 /* update the cache */
1169 for (i = 0; bids[i]; i++) {
1170 if (bids[i]->mapped) {
1171 ret = idmap_cache_set(idmap_cache, bids[i]);
1172 } else {
1173 ret = idmap_cache_set_negative_sid(idmap_cache, bids[i]);
1174 }
1175 IDMAP_CHECK_RET(ret);
1176 }
1177 }
1178
1179 ret = NT_STATUS_OK;
1180 done:
1181 talloc_free(ctx);
1182 return ret;
1183 }
1184
1185 NTSTATUS idmap_set_mapping(const struct id_map *id)
1186 {
1187 TALLOC_CTX *ctx;
1188 NTSTATUS ret;
1189
1190 if (! NT_STATUS_IS_OK(ret = idmap_init())) {
1191 return ret;
1192 }
1193
1194 /* sanity checks */
1195 if ((id->sid == NULL) || (! id->mapped)) {
1196 DEBUG(1, ("NULL SID or unmapped entry\n"));
1197 return NT_STATUS_INVALID_PARAMETER;
1198 }
1199
1200 /* TODO: check uid/gid range ? */
1201
1202 ctx = talloc_named_const(NULL, 0, "idmap_set_mapping ctx");
1203 if ( ! ctx) {
1204 DEBUG(1, ("failed to allocate talloc context, OOM?\n"));
1205 return NT_STATUS_NO_MEMORY;
1206 }
1207
1208 /* set the new mapping */
1209 ret = idmap_backends_set_mapping(id);
1210 IDMAP_CHECK_RET(ret);
1211
1212 /* set the mapping in the cache */
1213 ret = idmap_cache_set(idmap_cache, id);
1214 IDMAP_CHECK_RET(ret);
1215
1216 done:
1217 talloc_free(ctx);
1218 return ret;
1219 }
1220
1221 /**************************************************************************
1222 Dump backend status.
1223 **************************************************************************/
1224
1225 void idmap_dump_maps(char *logfile)
1226 {
1227 NTSTATUS ret;
1228 struct unixid allid;
1229 struct id_map *maps;
1230 int num_maps;
1231 FILE *dump;
1232 int i;
1233
1234 if (! NT_STATUS_IS_OK(ret = idmap_init())) {
1235 return;
1236 }
1237
1238 dump = fopen(logfile, "w");
1239 if ( ! dump) {
1240 DEBUG(0, ("Unable to open open stream for file [%s], errno: %d\n", logfile, errno));
1241 return;
1242 }
1243
1244 allid.type = ID_TYPE_UID;
1245 allid.id = 0;
1246 alloc_methods->get_id_hwm(&allid);
1247 fprintf(dump, "USER HWM %lu\n", (unsigned long)allid.id);
1248
1249 allid.type = ID_TYPE_GID;
1250 allid.id = 0;
1251 alloc_methods->get_id_hwm(&allid);
1252 fprintf(dump, "GROUP HWM %lu\n", (unsigned long)allid.id);
1253
1254 maps = talloc(idmap_ctx, struct id_map);
1255 num_maps = 0;
1256
1257 for (i = 0; i < num_domains; i++) {
1258 if (idmap_domains[i]->methods->dump_data) {
1259 idmap_domains[i]->methods->dump_data(idmap_domains[i], &maps, &num_maps);
1260 }
1261 }
1262
1263 for (i = 0; i < num_maps; i++) {
1264 switch (maps[i].xid.type) {
1265 case ID_TYPE_UID:
1266 fprintf(dump, "UID %lu %s\n",
1267 (unsigned long)maps[i].xid.id,
1268 sid_string_static(maps[i].sid));
1269 break;
1270 case ID_TYPE_GID:
1271 fprintf(dump, "GID %lu %s\n",
1272 (unsigned long)maps[i].xid.id,
1273 sid_string_static(maps[i].sid));
1274 break;
1275 }
1276 }
1277
1278 fflush(dump);
1279 fclose(dump);
1280 }
1281
1282 const char *idmap_fecth_secret(const char *backend, bool alloc,
1283 const char *domain, const char *identity)
1284 {
1285 char *tmp, *ret;
1286 int r;
1287
1288 if (alloc) {
1289 r = asprintf(&tmp, "IDMAP_ALLOC_%s", backend);
1290 } else {
1291 r = asprintf(&tmp, "IDMAP_%s_%s", backend, domain);
1292 }
1293
1294 if (r < 0) return NULL;
1295
1296 strupper_m(tmp); /* make sure the key is case insensitive */
1297 ret = secrets_fetch_generic(tmp, identity);
1298
1299 free(tmp);
1300 return ret;
1301 }
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