ok next_rid out as well local_*id_to*id functions
[Samba/bb.git] / source / smbd / uid.c
blob353ae8f50d9dd477e5092886ea683fe7abfb548a
1 /*
2 Unix SMB/CIFS implementation.
3 uid/user handling
4 Copyright (C) Andrew Tridgell 1992-1998
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include "includes.h"
23 /* what user is current? */
24 extern struct current_user current_user;
26 /****************************************************************************
27 Become the guest user without changing the security context stack.
28 ****************************************************************************/
30 BOOL change_to_guest(void)
32 static struct passwd *pass=NULL;
34 if (!pass) {
35 /* Don't need to free() this as its stored in a static */
36 pass = getpwnam_alloc(lp_guestaccount());
37 if (!pass)
38 return(False);
41 #ifdef AIX
42 /* MWW: From AIX FAQ patch to WU-ftpd: call initgroups before
43 setting IDs */
44 initgroups(pass->pw_name, pass->pw_gid);
45 #endif
47 set_sec_ctx(pass->pw_uid, pass->pw_gid, 0, NULL, NULL);
49 current_user.conn = NULL;
50 current_user.vuid = UID_FIELD_INVALID;
52 passwd_free(&pass);
54 return True;
57 /*******************************************************************
58 Check if a username is OK.
59 ********************************************************************/
61 static BOOL check_user_ok(connection_struct *conn, user_struct *vuser,int snum)
63 unsigned i;
64 for (i=0;i<conn->vuid_cache.entries && i< VUID_CACHE_SIZE;i++)
65 if (conn->vuid_cache.list[i] == vuser->vuid)
66 return(True);
68 if ((conn->force_user || conn->force_group)
69 && (conn->vuid != vuser->vuid)) {
70 return False;
73 if (!user_ok(vuser->user.unix_name,snum, vuser->groups, vuser->n_groups))
74 return(False);
76 if (!share_access_check(conn, snum, vuser, conn->read_only ? FILE_READ_DATA : FILE_WRITE_DATA)) {
77 return False;
80 i = conn->vuid_cache.entries % VUID_CACHE_SIZE;
81 conn->vuid_cache.list[i] = vuser->vuid;
83 conn->vuid_cache.entries++;
85 return(True);
88 /****************************************************************************
89 Become the user of a connection number without changing the security context
90 stack, but modify the currnet_user entries.
91 ****************************************************************************/
93 BOOL change_to_user(connection_struct *conn, uint16 vuid)
95 user_struct *vuser = get_valid_user_struct(vuid);
96 int snum;
97 gid_t gid;
98 uid_t uid;
99 char group_c;
100 BOOL must_free_token = False;
101 NT_USER_TOKEN *token = NULL;
103 if (!conn) {
104 DEBUG(2,("change_to_user: Connection not open\n"));
105 return(False);
109 * We need a separate check in security=share mode due to vuid
110 * always being UID_FIELD_INVALID. If we don't do this then
111 * in share mode security we are *always* changing uid's between
112 * SMB's - this hurts performance - Badly.
115 if((lp_security() == SEC_SHARE) && (current_user.conn == conn) &&
116 (current_user.uid == conn->uid)) {
117 DEBUG(4,("change_to_user: Skipping user change - already user\n"));
118 return(True);
119 } else if ((current_user.conn == conn) &&
120 (vuser != 0) && (current_user.vuid == vuid) &&
121 (current_user.uid == vuser->uid)) {
122 DEBUG(4,("change_to_user: Skipping user change - already user\n"));
123 return(True);
126 snum = SNUM(conn);
128 if (conn->force_user) /* security = share sets this too */ {
129 uid = conn->uid;
130 gid = conn->gid;
131 current_user.groups = conn->groups;
132 current_user.ngroups = conn->ngroups;
133 token = conn->nt_user_token;
134 } else if ((vuser) && check_user_ok(conn, vuser, snum)) {
135 uid = vuser->uid;
136 gid = vuser->gid;
137 current_user.ngroups = vuser->n_groups;
138 current_user.groups = vuser->groups;
139 token = vuser->nt_user_token;
140 } else {
141 DEBUG(2,("change_to_user: Invalid vuid used %d or vuid not permitted access to share.\n",vuid));
142 return False;
146 * See if we should force group for this service.
147 * If so this overrides any group set in the force
148 * user code.
151 if((group_c = *lp_force_group(snum))) {
152 BOOL is_guest = False;
154 if(group_c == '+') {
157 * Only force group if the user is a member of
158 * the service group. Check the group memberships for
159 * this user (we already have this) to
160 * see if we should force the group.
163 int i;
164 for (i = 0; i < current_user.ngroups; i++) {
165 if (current_user.groups[i] == conn->gid) {
166 gid = conn->gid;
167 break;
170 } else {
171 gid = conn->gid;
175 * We've changed the group list in the token - we must
176 * re-create it.
179 if (vuser && vuser->guest)
180 is_guest = True;
182 token = create_nt_token(uid, gid, current_user.ngroups, current_user.groups, is_guest);
183 if (!token) {
184 DEBUG(1, ("change_to_user: create_nt_token failed!\n"));
185 return False;
187 must_free_token = True;
190 set_sec_ctx(uid, gid, current_user.ngroups, current_user.groups, token);
193 * Free the new token (as set_sec_ctx copies it).
196 if (must_free_token)
197 delete_nt_token(&token);
199 current_user.conn = conn;
200 current_user.vuid = vuid;
202 DEBUG(5,("change_to_user uid=(%d,%d) gid=(%d,%d)\n",
203 (int)getuid(),(int)geteuid(),(int)getgid(),(int)getegid()));
205 return(True);
208 /****************************************************************************
209 Go back to being root without changing the security context stack,
210 but modify the current_user entries.
211 ****************************************************************************/
213 BOOL change_to_root_user(void)
215 set_root_sec_ctx();
217 DEBUG(5,("change_to_root_user: now uid=(%d,%d) gid=(%d,%d)\n",
218 (int)getuid(),(int)geteuid(),(int)getgid(),(int)getegid()));
220 current_user.conn = NULL;
221 current_user.vuid = UID_FIELD_INVALID;
223 return(True);
226 /****************************************************************************
227 Become the user of an authenticated connected named pipe.
228 When this is called we are currently running as the connection
229 user. Doesn't modify current_user.
230 ****************************************************************************/
232 BOOL become_authenticated_pipe_user(pipes_struct *p)
234 if (!push_sec_ctx())
235 return False;
237 set_sec_ctx(p->pipe_user.uid, p->pipe_user.gid,
238 p->pipe_user.ngroups, p->pipe_user.groups, p->pipe_user.nt_user_token);
240 return True;
243 /****************************************************************************
244 Unbecome the user of an authenticated connected named pipe.
245 When this is called we are running as the authenticated pipe
246 user and need to go back to being the connection user. Doesn't modify
247 current_user.
248 ****************************************************************************/
250 BOOL unbecome_authenticated_pipe_user(void)
252 return pop_sec_ctx();
255 /****************************************************************************
256 Utility functions used by become_xxx/unbecome_xxx.
257 ****************************************************************************/
259 struct conn_ctx {
260 connection_struct *conn;
261 uint16 vuid;
264 /* A stack of current_user connection contexts. */
266 static struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
267 static int conn_ctx_stack_ndx;
269 static void push_conn_ctx(void)
271 struct conn_ctx *ctx_p;
273 /* Check we don't overflow our stack */
275 if (conn_ctx_stack_ndx == MAX_SEC_CTX_DEPTH) {
276 DEBUG(0, ("Connection context stack overflow!\n"));
277 smb_panic("Connection context stack overflow!\n");
280 /* Store previous user context */
281 ctx_p = &conn_ctx_stack[conn_ctx_stack_ndx];
283 ctx_p->conn = current_user.conn;
284 ctx_p->vuid = current_user.vuid;
286 DEBUG(3, ("push_conn_ctx(%u) : conn_ctx_stack_ndx = %d\n",
287 (unsigned int)ctx_p->vuid, conn_ctx_stack_ndx ));
289 conn_ctx_stack_ndx++;
292 static void pop_conn_ctx(void)
294 struct conn_ctx *ctx_p;
296 /* Check for stack underflow. */
298 if (conn_ctx_stack_ndx == 0) {
299 DEBUG(0, ("Connection context stack underflow!\n"));
300 smb_panic("Connection context stack underflow!\n");
303 conn_ctx_stack_ndx--;
304 ctx_p = &conn_ctx_stack[conn_ctx_stack_ndx];
306 current_user.conn = ctx_p->conn;
307 current_user.vuid = ctx_p->vuid;
309 ctx_p->conn = NULL;
310 ctx_p->vuid = UID_FIELD_INVALID;
313 void init_conn_ctx(void)
315 int i;
317 /* Initialise connection context stack */
318 for (i = 0; i < MAX_SEC_CTX_DEPTH; i++) {
319 conn_ctx_stack[i].conn = NULL;
320 conn_ctx_stack[i].vuid = UID_FIELD_INVALID;
324 /****************************************************************************
325 Temporarily become a root user. Must match with unbecome_root(). Saves and
326 restores the connection context.
327 ****************************************************************************/
329 void become_root(void)
331 push_sec_ctx();
332 push_conn_ctx();
333 set_root_sec_ctx();
336 /* Unbecome the root user */
338 void unbecome_root(void)
340 pop_sec_ctx();
341 pop_conn_ctx();
344 /****************************************************************************
345 Push the current security context then force a change via change_to_user().
346 Saves and restores the connection context.
347 ****************************************************************************/
349 BOOL become_user(connection_struct *conn, uint16 vuid)
351 if (!push_sec_ctx())
352 return False;
354 push_conn_ctx();
356 if (!change_to_user(conn, vuid)) {
357 pop_sec_ctx();
358 pop_conn_ctx();
359 return False;
362 return True;
365 BOOL unbecome_user(void)
367 pop_sec_ctx();
368 pop_conn_ctx();
369 return True;
372 /*****************************************************************
373 Convert the suplimentary SIDs returned in a netlogon into UNIX
374 group gid_t's. Add to the total group array.
375 *****************************************************************/
377 void add_supplementary_nt_login_groups(int *n_groups, gid_t **pp_groups, NT_USER_TOKEN **pptok)
379 int total_groups;
380 int current_n_groups = *n_groups;
381 gid_t *final_groups = NULL;
382 size_t i;
383 NT_USER_TOKEN *ptok = *pptok;
384 NT_USER_TOKEN *new_tok = NULL;
386 if (!ptok || (ptok->num_sids == 0))
387 return;
389 new_tok = dup_nt_token(ptok);
390 if (!new_tok) {
391 DEBUG(0,("add_supplementary_nt_login_groups: Failed to malloc new token\n"));
392 return;
394 /* Leave the allocated space but empty the number of SIDs. */
395 new_tok->num_sids = 0;
397 total_groups = current_n_groups + ptok->num_sids;
399 final_groups = (gid_t *)malloc(total_groups * sizeof(gid_t));
400 if (!final_groups) {
401 DEBUG(0,("add_supplementary_nt_login_groups: Failed to malloc new groups.\n"));
402 delete_nt_token(&new_tok);
403 return;
406 memcpy(final_groups, *pp_groups, current_n_groups * sizeof(gid_t));
407 for (i = 0; i < ptok->num_sids; i++) {
408 enum SID_NAME_USE sid_type;
409 gid_t new_grp;
411 if (sid_to_gid(&ptok->user_sids[i], &new_grp, &sid_type)) {
413 * Don't add the gid_t if it is already in the current group
414 * list. Some UNIXen don't like the same group more than once.
416 int j;
418 for (j = 0; j < current_n_groups; j++)
419 if (final_groups[j] == new_grp)
420 break;
422 if ( j == current_n_groups) {
423 /* Group not already present. */
424 final_groups[current_n_groups++] = new_grp;
426 } else {
427 /* SID didn't map. Copy to the new token to be saved. */
428 sid_copy(&new_tok->user_sids[new_tok->num_sids++], &ptok->user_sids[i]);
432 SAFE_FREE(*pp_groups);
433 *pp_groups = final_groups;
434 *n_groups = current_n_groups;
436 /* Replace the old token with the truncated one. */
437 delete_nt_token(&ptok);
438 *pptok = new_tok;
441 /*****************************************************************
442 *THE CANONICAL* convert name to SID function.
443 Tries local lookup first - for local domains - then uses winbind.
444 *****************************************************************/
446 BOOL lookup_name(const char *domain, const char *name, DOM_SID *psid, enum SID_NAME_USE *name_type)
448 fstring sid;
449 BOOL local_lookup = False;
451 *name_type = SID_NAME_UNKNOWN;
453 /* If we are looking up a domain user, make sure it is
454 for the local machine only */
456 if (strequal(global_myname(), domain)) {
457 local_lookup = True;
458 } else if (lp_server_role() == ROLE_DOMAIN_PDC ||
459 lp_server_role() == ROLE_DOMAIN_BDC) {
460 if (strequal(domain, lp_workgroup())) {
461 local_lookup = True;
465 if (local_lookup) {
466 if (local_lookup_name(name, psid, name_type)) {
467 DEBUG(10,
468 ("lookup_name: (local) [%s]\\[%s] -> SID %s (type %s: %u)\n",
469 domain, name, sid_to_string(sid,psid),
470 sid_type_lookup(*name_type), (unsigned int)*name_type));
471 return True;
473 } else {
474 /* Remote */
475 if (winbind_lookup_name(domain, name, psid, name_type)) {
477 DEBUG(10,("lookup_name (winbindd): [%s]\\[%s] -> SID %s (type %u)\n",
478 domain, name, sid_to_string(sid, psid),
479 (unsigned int)*name_type));
480 return True;
484 DEBUG(10, ("lookup_name: %s lookup for [%s]\\[%s] failed\n",
485 local_lookup ? "local" : "winbind", domain, name));
487 return False;
490 /*****************************************************************
491 *THE CANONICAL* convert SID to name function.
492 Tries local lookup first - for local sids, then tries winbind.
493 *****************************************************************/
495 BOOL lookup_sid(DOM_SID *sid, fstring dom_name, fstring name, enum SID_NAME_USE *name_type)
497 if (!name_type)
498 return False;
500 *name_type = SID_NAME_UNKNOWN;
502 /* Check if this is our own sid. This should perhaps be done by
503 winbind? For the moment handle it here. */
505 if (sid->num_auths == 5) {
506 DOM_SID tmp_sid;
507 uint32 rid;
509 sid_copy(&tmp_sid, sid);
510 sid_split_rid(&tmp_sid, &rid);
512 if (sid_equal(get_global_sam_sid(), &tmp_sid)) {
514 return map_domain_sid_to_name(&tmp_sid, dom_name) &&
515 local_lookup_sid(sid, name, name_type);
519 if (!winbind_lookup_sid(sid, dom_name, name, name_type)) {
520 fstring sid_str;
521 DOM_SID tmp_sid;
522 uint32 rid;
524 DEBUG(10,("lookup_sid: winbind lookup for SID %s failed - trying local.\n", sid_to_string(sid_str, sid) ));
526 sid_copy(&tmp_sid, sid);
527 sid_split_rid(&tmp_sid, &rid);
528 return map_domain_sid_to_name(&tmp_sid, dom_name) &&
529 lookup_known_rid(&tmp_sid, rid, name, name_type);
531 return True;
534 /*****************************************************************
535 Id mapping cache. This is to avoid Winbind mappings already
536 seen by smbd to be queried too frequently, keeping winbindd
537 busy, and blocking smbd while winbindd is busy with other
538 stuff. Written by Michael Steffens <michael.steffens@hp.com>,
539 modified to use linked lists by jra.
540 *****************************************************************/
542 #define MAX_UID_SID_CACHE_SIZE 100
543 #define TURNOVER_UID_SID_CACHE_SIZE 10
544 #define MAX_GID_SID_CACHE_SIZE 100
545 #define TURNOVER_GID_SID_CACHE_SIZE 10
547 static size_t n_uid_sid_cache = 0;
548 static size_t n_gid_sid_cache = 0;
550 static struct uid_sid_cache {
551 struct uid_sid_cache *next, *prev;
552 uid_t uid;
553 DOM_SID sid;
554 enum SID_NAME_USE sidtype;
555 } *uid_sid_cache_head;
557 static struct gid_sid_cache {
558 struct gid_sid_cache *next, *prev;
559 gid_t gid;
560 DOM_SID sid;
561 enum SID_NAME_USE sidtype;
562 } *gid_sid_cache_head;
564 /*****************************************************************
565 Find a SID given a uid.
566 *****************************************************************/
568 static BOOL fetch_sid_from_uid_cache(DOM_SID *psid, enum SID_NAME_USE *psidtype, uid_t uid)
570 struct uid_sid_cache *pc;
572 for (pc = uid_sid_cache_head; pc; pc = pc->next) {
573 if (pc->uid == uid) {
574 fstring sid;
575 *psid = pc->sid;
576 *psidtype = pc->sidtype;
577 DEBUG(3,("fetch sid from uid cache %u -> %s\n",
578 (unsigned int)uid, sid_to_string(sid, psid)));
579 DLIST_PROMOTE(uid_sid_cache_head, pc);
580 return True;
583 return False;
586 /*****************************************************************
587 Find a uid given a SID.
588 *****************************************************************/
590 static BOOL fetch_uid_from_cache(uid_t *puid, const DOM_SID *psid, enum SID_NAME_USE sidtype)
592 struct uid_sid_cache *pc;
594 for (pc = uid_sid_cache_head; pc; pc = pc->next) {
595 if (sid_compare(&pc->sid, psid) == 0) {
596 fstring sid;
597 *puid = pc->uid;
598 DEBUG(3,("fetch uid from cache %u -> %s\n",
599 (unsigned int)*puid, sid_to_string(sid, psid)));
600 DLIST_PROMOTE(uid_sid_cache_head, pc);
601 return True;
604 return False;
607 /*****************************************************************
608 Store uid to SID mapping in cache.
609 *****************************************************************/
611 static void store_uid_sid_cache(const DOM_SID *psid, const enum SID_NAME_USE sidtype, uid_t uid)
613 struct uid_sid_cache *pc;
615 if (n_uid_sid_cache >= MAX_UID_SID_CACHE_SIZE && n_uid_sid_cache > TURNOVER_UID_SID_CACHE_SIZE) {
616 /* Delete the last TURNOVER_UID_SID_CACHE_SIZE entries. */
617 struct uid_sid_cache *pc_next;
618 size_t i;
620 for (i = 0, pc = uid_sid_cache_head; i < (n_uid_sid_cache - TURNOVER_UID_SID_CACHE_SIZE); i++, pc = pc->next)
622 for(; pc; pc = pc_next) {
623 pc_next = pc->next;
624 DLIST_REMOVE(uid_sid_cache_head,pc);
625 SAFE_FREE(pc);
626 n_uid_sid_cache--;
630 pc = (struct uid_sid_cache *)malloc(sizeof(struct uid_sid_cache));
631 if (!pc)
632 return;
633 pc->uid = uid;
634 sid_copy(&pc->sid, psid);
635 pc->sidtype = sidtype;
636 DLIST_ADD(uid_sid_cache_head, pc);
637 n_uid_sid_cache++;
640 /*****************************************************************
641 Find a SID given a gid.
642 *****************************************************************/
644 static BOOL fetch_sid_from_gid_cache(DOM_SID *psid, enum SID_NAME_USE *psidtype, gid_t gid)
646 struct gid_sid_cache *pc;
648 for (pc = gid_sid_cache_head; pc; pc = pc->next) {
649 if (pc->gid == gid) {
650 fstring sid;
651 *psid = pc->sid;
652 *psidtype = pc->sidtype;
653 DEBUG(3,("fetch sid from gid cache %u -> %s\n",
654 (unsigned int)gid, sid_to_string(sid, psid)));
655 DLIST_PROMOTE(gid_sid_cache_head, pc);
656 return True;
659 return False;
662 /*****************************************************************
663 Find a gid given a SID.
664 *****************************************************************/
666 static BOOL fetch_gid_from_cache(gid_t *pgid, const DOM_SID *psid, enum SID_NAME_USE sidtype)
668 struct gid_sid_cache *pc;
670 for (pc = gid_sid_cache_head; pc; pc = pc->next) {
671 if (sid_compare(&pc->sid, psid) == 0) {
672 fstring sid;
673 *pgid = pc->gid;
674 DEBUG(3,("fetch uid from cache %u -> %s\n",
675 (unsigned int)*pgid, sid_to_string(sid, psid)));
676 DLIST_PROMOTE(gid_sid_cache_head, pc);
677 return True;
680 return False;
683 /*****************************************************************
684 Store gid to SID mapping in cache.
685 *****************************************************************/
687 static void store_gid_sid_cache(const DOM_SID *psid, const enum SID_NAME_USE sidtype, gid_t gid)
689 struct gid_sid_cache *pc;
691 if (n_gid_sid_cache >= MAX_GID_SID_CACHE_SIZE && n_gid_sid_cache > TURNOVER_GID_SID_CACHE_SIZE) {
692 /* Delete the last TURNOVER_GID_SID_CACHE_SIZE entries. */
693 struct gid_sid_cache *pc_next;
694 size_t i;
696 for (i = 0, pc = gid_sid_cache_head; i < (n_gid_sid_cache - TURNOVER_GID_SID_CACHE_SIZE); i++, pc = pc->next)
698 for(; pc; pc = pc_next) {
699 pc_next = pc->next;
700 DLIST_REMOVE(gid_sid_cache_head,pc);
701 SAFE_FREE(pc);
702 n_gid_sid_cache--;
706 pc = (struct gid_sid_cache *)malloc(sizeof(struct gid_sid_cache));
707 if (!pc)
708 return;
709 pc->gid = gid;
710 sid_copy(&pc->sid, psid);
711 pc->sidtype = sidtype;
712 DLIST_ADD(gid_sid_cache_head, pc);
713 n_gid_sid_cache++;
717 /*****************************************************************
718 *THE CANONICAL* convert uid_t to SID function.
719 Tries winbind first - then uses local lookup.
720 Returns SID pointer.
721 *****************************************************************/
723 DOM_SID *uid_to_sid(DOM_SID *psid, uid_t uid)
725 unid_t id;
727 DEBUG(10,("uid_to_sid: uid = [%d]\n", uid));
729 id.uid = uid;
730 if (NT_STATUS_IS_OK(idmap_get_sid_from_id(psid, id, ID_USERID))) {
731 DEBUG(10, ("uid_to_sid: sid = [%s]\n", sid_string_static(psid)));
732 return psid;
735 /* If mapping is not found in idmap try with traditional method,
736 then stores the result in idmap.
737 We may add a switch in future to allow smooth migrations to
738 idmap-only db ---Simo */
740 sid_copy(psid, get_global_sam_sid());
741 sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
743 DEBUG(10,("uid_to_sid: algorithmic %u -> %s\n", (unsigned int)uid, sid_string_static(psid)));
745 return psid;
749 /*****************************************************************
750 *THE CANONICAL* convert gid_t to SID function.
751 Tries winbind first - then uses local lookup.
752 Returns SID pointer.
753 *****************************************************************/
755 DOM_SID *gid_to_sid(DOM_SID *psid, gid_t gid)
757 GROUP_MAP map;
758 unid_t id;
760 DEBUG(10,("gid_to_sid: gid = [%d]\n", gid));
762 id.gid = gid;
763 if (NT_STATUS_IS_OK(idmap_get_sid_from_id(psid, id, ID_GROUPID))) {
764 DEBUG(10, ("gid_to_sid: sid = [%s]\n", sid_string_static(psid)));
765 return psid;
768 /* If mapping is not found in idmap try with traditional method,
769 then stores the result in idmap.
770 We may add a switch in future to allow smooth migrations to
771 idmap-only db ---Simo */
773 if (pdb_getgrgid(&map, gid, MAPPING_WITHOUT_PRIV)) {
774 sid_copy(psid, &map.sid);
775 } else {
776 sid_copy(psid, get_global_sam_sid());
777 sid_append_rid(psid, pdb_gid_to_group_rid(gid));
780 DEBUG(10,("gid_to_sid: algorithmic %u -> %s\n", (unsigned int)gid, sid_string_static(psid)));
782 return psid;
785 /*****************************************************************
786 *THE CANONICAL* convert SID to uid function.
787 Tries winbind first - then uses local lookup.
788 Returns True if this name is a user sid and the conversion
789 was done correctly, False if not. sidtype is set by this function.
790 *****************************************************************/
792 BOOL sid_to_uid(const DOM_SID *psid, uid_t *puid, enum SID_NAME_USE *sidtype)
794 unid_t id;
795 int type;
797 DEBUG(10,("sid_to_uid: sid = [%s]\n", sid_string_static(psid)));
799 *sidtype = SID_NAME_USER;
801 type = ID_USERID;
802 if (NT_STATUS_IS_OK(idmap_get_id_from_sid(&id, &type, psid))) {
803 DEBUG(10,("sid_to_uid: uid = [%d]\n", id.uid));
804 *puid = id.uid;
805 return True;
808 if (sid_compare_domain(get_global_sam_sid(), psid) == 0) {
809 BOOL result;
810 uint32 rid;
812 DEBUG(10,("sid_to_uid: sid is local [%s]\n", sid_string_static(get_global_sam_sid())));
814 if (!sid_peek_rid(psid, &rid)) {
815 DEBUG(0, ("sid_to_uid: Error extracting RID from SID\n!"));
816 return False;
818 if (!pdb_rid_is_user(rid)) {
819 DEBUG(3, ("sid_to_uid: RID %u is *NOT* a user\n", (unsigned)rid));
820 return False;
822 *puid = fallback_pdb_user_rid_to_uid(rid);
823 return True;
825 return False;
828 /*****************************************************************
829 *THE CANONICAL* convert SID to gid function.
830 Tries winbind first - then uses local lookup.
831 Returns True if this name is a user sid and the conversion
832 was done correctly, False if not.
833 *****************************************************************/
835 BOOL sid_to_gid(const DOM_SID *psid, gid_t *pgid, enum SID_NAME_USE *sidtype)
837 unid_t id;
838 int type;
840 DEBUG(10,("sid_to_gid: sid = [%s]\n", sid_string_static(psid)));
842 *sidtype = SID_NAME_ALIAS;
844 type = ID_GROUPID;
845 if (NT_STATUS_IS_OK(idmap_get_id_from_sid(&id, &type, psid))) {
846 DEBUG(10,("sid_to_gid: gid = [%d]\n", id.gid));
847 *pgid = id.gid;
848 return True;
851 if (sid_compare_domain(get_global_sam_sid(), psid) == 0) {
852 GROUP_MAP map;
853 BOOL result;
855 if (pdb_getgrsid(&map, *psid, MAPPING_WITHOUT_PRIV)) {
856 /* the SID is in the mapping table but not mapped */
857 if (map.gid==(gid_t)-1)
858 return False;
860 *pgid = map.gid;
861 *sidtype = map.sid_name_use;
862 return True;
863 } else {
864 uint32 rid;
866 if (!sid_peek_rid(psid, &rid)) {
867 DEBUG(0, ("sid_to_gid: Error extracting RID from SID\n!"));
868 return False;
870 if (pdb_rid_is_user(rid)) {
871 DEBUG(3, ("sid_to_gid: RID %u is *NOT* a group\n", (unsigned)rid));
872 return False;
874 *pgid = pdb_group_rid_to_gid(rid);
875 *sidtype = SID_NAME_ALIAS;
879 return False;