2 Unix SMB/CIFS implementation.
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.
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
;
35 /* Don't need to free() this as its stored in a static */
36 pass
= getpwnam_alloc(lp_guestaccount());
42 /* MWW: From AIX FAQ patch to WU-ftpd: call initgroups before
44 initgroups(pass
->pw_name
, pass
->pw_gid
);
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
;
57 /*******************************************************************
58 Check if a username is OK.
59 ********************************************************************/
61 static BOOL
check_user_ok(connection_struct
*conn
, user_struct
*vuser
,int snum
)
64 for (i
=0;i
<conn
->vuid_cache
.entries
&& i
< VUID_CACHE_SIZE
;i
++)
65 if (conn
->vuid_cache
.list
[i
] == vuser
->vuid
)
68 if ((conn
->force_user
|| conn
->force_group
)
69 && (conn
->vuid
!= vuser
->vuid
)) {
73 if (!user_ok(vuser
->user
.unix_name
,snum
, vuser
->groups
, vuser
->n_groups
))
76 if (!share_access_check(conn
, snum
, vuser
, conn
->read_only
? FILE_READ_DATA
: FILE_WRITE_DATA
)) {
80 i
= conn
->vuid_cache
.entries
% VUID_CACHE_SIZE
;
81 conn
->vuid_cache
.list
[i
] = vuser
->vuid
;
83 conn
->vuid_cache
.entries
++;
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
);
100 BOOL must_free_token
= False
;
101 NT_USER_TOKEN
*token
= NULL
;
104 DEBUG(2,("change_to_user: Connection not open\n"));
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"));
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"));
128 if (conn
->force_user
) /* security = share sets this too */ {
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
)) {
137 current_user
.ngroups
= vuser
->n_groups
;
138 current_user
.groups
= vuser
->groups
;
139 token
= vuser
->nt_user_token
;
141 DEBUG(2,("change_to_user: Invalid vuid used %d or vuid not permitted access to share.\n",vuid
));
146 * See if we should force group for this service.
147 * If so this overrides any group set in the force
151 if((group_c
= *lp_force_group(snum
))) {
152 BOOL is_guest
= False
;
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.
164 for (i
= 0; i
< current_user
.ngroups
; i
++) {
165 if (current_user
.groups
[i
] == conn
->gid
) {
175 * We've changed the group list in the token - we must
179 if (vuser
&& vuser
->guest
)
182 token
= create_nt_token(uid
, gid
, current_user
.ngroups
, current_user
.groups
, is_guest
);
184 DEBUG(1, ("change_to_user: create_nt_token failed!\n"));
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).
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()));
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)
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
;
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
)
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
);
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
248 ****************************************************************************/
250 BOOL
unbecome_authenticated_pipe_user(void)
252 return pop_sec_ctx();
255 /****************************************************************************
256 Utility functions used by become_xxx/unbecome_xxx.
257 ****************************************************************************/
260 connection_struct
*conn
;
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
;
310 ctx_p
->vuid
= UID_FIELD_INVALID
;
313 void init_conn_ctx(void)
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)
336 /* Unbecome the root user */
338 void unbecome_root(void)
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
)
356 if (!change_to_user(conn
, vuid
)) {
365 BOOL
unbecome_user(void)
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
)
380 int current_n_groups
= *n_groups
;
381 gid_t
*final_groups
= NULL
;
383 NT_USER_TOKEN
*ptok
= *pptok
;
384 NT_USER_TOKEN
*new_tok
= NULL
;
386 if (!ptok
|| (ptok
->num_sids
== 0))
389 new_tok
= dup_nt_token(ptok
);
391 DEBUG(0,("add_supplementary_nt_login_groups: Failed to malloc new token\n"));
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
));
401 DEBUG(0,("add_supplementary_nt_login_groups: Failed to malloc new groups.\n"));
402 delete_nt_token(&new_tok
);
406 memcpy(final_groups
, *pp_groups
, current_n_groups
* sizeof(gid_t
));
407 for (i
= 0; i
< ptok
->num_sids
; i
++) {
410 if (NT_STATUS_IS_OK(sid_to_gid(&ptok
->user_sids
[i
], &new_grp
))) {
412 * Don't add the gid_t if it is already in the current group
413 * list. Some UNIXen don't like the same group more than once.
417 for (j
= 0; j
< current_n_groups
; j
++)
418 if (final_groups
[j
] == new_grp
)
421 if ( j
== current_n_groups
) {
422 /* Group not already present. */
423 final_groups
[current_n_groups
++] = new_grp
;
426 /* SID didn't map. Copy to the new token to be saved. */
427 sid_copy(&new_tok
->user_sids
[new_tok
->num_sids
++], &ptok
->user_sids
[i
]);
431 SAFE_FREE(*pp_groups
);
432 *pp_groups
= final_groups
;
433 *n_groups
= current_n_groups
;
435 /* Replace the old token with the truncated one. */
436 delete_nt_token(&ptok
);
440 /*****************************************************************
441 *THE CANONICAL* convert name to SID function.
442 Tries local lookup first - for local domains - then uses winbind.
443 *****************************************************************/
445 BOOL
lookup_name(const char *domain
, const char *name
, DOM_SID
*psid
, enum SID_NAME_USE
*name_type
)
448 BOOL local_lookup
= False
;
450 *name_type
= SID_NAME_UNKNOWN
;
452 /* If we are looking up a domain user, make sure it is
453 for the local machine only */
455 if (strequal(global_myname(), domain
)) {
457 } else if (lp_server_role() == ROLE_DOMAIN_PDC
||
458 lp_server_role() == ROLE_DOMAIN_BDC
) {
459 if (strequal(domain
, lp_workgroup())) {
465 if (local_lookup_name(name
, psid
, name_type
)) {
467 ("lookup_name: (local) [%s]\\[%s] -> SID %s (type %s: %u)\n",
468 domain
, name
, sid_to_string(sid
,psid
),
469 sid_type_lookup(*name_type
), (unsigned int)*name_type
));
474 if (winbind_lookup_name(domain
, name
, psid
, name_type
)) {
476 DEBUG(10,("lookup_name (winbindd): [%s]\\[%s] -> SID %s (type %u)\n",
477 domain
, name
, sid_to_string(sid
, psid
),
478 (unsigned int)*name_type
));
483 DEBUG(10, ("lookup_name: %s lookup for [%s]\\[%s] failed\n",
484 local_lookup
? "local" : "winbind", domain
, name
));
489 /*****************************************************************
490 *THE CANONICAL* convert SID to name function.
491 Tries local lookup first - for local sids, then tries winbind.
492 *****************************************************************/
494 BOOL
lookup_sid(DOM_SID
*sid
, fstring dom_name
, fstring name
, enum SID_NAME_USE
*name_type
)
499 *name_type
= SID_NAME_UNKNOWN
;
501 /* Check if this is our own sid. This should perhaps be done by
502 winbind? For the moment handle it here. */
504 if (sid
->num_auths
== 5) {
508 sid_copy(&tmp_sid
, sid
);
509 sid_split_rid(&tmp_sid
, &rid
);
511 if (sid_equal(get_global_sam_sid(), &tmp_sid
)) {
513 return map_domain_sid_to_name(&tmp_sid
, dom_name
) &&
514 local_lookup_sid(sid
, name
, name_type
);
518 if (!winbind_lookup_sid(sid
, dom_name
, name
, name_type
)) {
523 DEBUG(10,("lookup_sid: winbind lookup for SID %s failed - trying local.\n", sid_to_string(sid_str
, sid
) ));
525 sid_copy(&tmp_sid
, sid
);
526 sid_split_rid(&tmp_sid
, &rid
);
527 return map_domain_sid_to_name(&tmp_sid
, dom_name
) &&
528 lookup_known_rid(&tmp_sid
, rid
, name
, name_type
);
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
;
554 enum SID_NAME_USE sidtype
;
555 } *uid_sid_cache_head
;
557 static struct gid_sid_cache
{
558 struct gid_sid_cache
*next
, *prev
;
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
, 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
) {
576 DEBUG(3,("fetch sid from uid cache %u -> %s\n",
577 (unsigned int)uid
, sid_to_string(sid
, psid
)));
578 DLIST_PROMOTE(uid_sid_cache_head
, pc
);
585 /*****************************************************************
586 Find a uid given a SID.
587 *****************************************************************/
589 static BOOL
fetch_uid_from_cache( uid_t
*puid
, const DOM_SID
*psid
)
591 struct uid_sid_cache
*pc
;
593 for (pc
= uid_sid_cache_head
; pc
; pc
= pc
->next
) {
594 if (sid_compare(&pc
->sid
, psid
) == 0) {
597 DEBUG(3,("fetch uid from cache %u -> %s\n",
598 (unsigned int)*puid
, sid_to_string(sid
, psid
)));
599 DLIST_PROMOTE(uid_sid_cache_head
, pc
);
606 /*****************************************************************
607 Store uid to SID mapping in cache.
608 *****************************************************************/
610 static void store_uid_sid_cache(const DOM_SID
*psid
, uid_t uid
)
612 struct uid_sid_cache
*pc
;
614 if (n_uid_sid_cache
>= MAX_UID_SID_CACHE_SIZE
&& n_uid_sid_cache
> TURNOVER_UID_SID_CACHE_SIZE
) {
615 /* Delete the last TURNOVER_UID_SID_CACHE_SIZE entries. */
616 struct uid_sid_cache
*pc_next
;
619 for (i
= 0, pc
= uid_sid_cache_head
; i
< (n_uid_sid_cache
- TURNOVER_UID_SID_CACHE_SIZE
); i
++, pc
= pc
->next
)
621 for(; pc
; pc
= pc_next
) {
623 DLIST_REMOVE(uid_sid_cache_head
,pc
);
629 pc
= (struct uid_sid_cache
*)malloc(sizeof(struct uid_sid_cache
));
633 sid_copy(&pc
->sid
, psid
);
634 DLIST_ADD(uid_sid_cache_head
, pc
);
638 /*****************************************************************
639 Find a SID given a gid.
640 *****************************************************************/
642 static BOOL
fetch_sid_from_gid_cache(DOM_SID
*psid
, gid_t gid
)
644 struct gid_sid_cache
*pc
;
646 for (pc
= gid_sid_cache_head
; pc
; pc
= pc
->next
) {
647 if (pc
->gid
== gid
) {
650 DEBUG(3,("fetch sid from gid cache %u -> %s\n",
651 (unsigned int)gid
, sid_to_string(sid
, psid
)));
652 DLIST_PROMOTE(gid_sid_cache_head
, pc
);
659 /*****************************************************************
660 Find a gid given a SID.
661 *****************************************************************/
663 static BOOL
fetch_gid_from_cache(gid_t
*pgid
, const DOM_SID
*psid
)
665 struct gid_sid_cache
*pc
;
667 for (pc
= gid_sid_cache_head
; pc
; pc
= pc
->next
) {
668 if (sid_compare(&pc
->sid
, psid
) == 0) {
671 DEBUG(3,("fetch uid from cache %u -> %s\n",
672 (unsigned int)*pgid
, sid_to_string(sid
, psid
)));
673 DLIST_PROMOTE(gid_sid_cache_head
, pc
);
680 /*****************************************************************
681 Store gid to SID mapping in cache.
682 *****************************************************************/
684 static void store_gid_sid_cache(const DOM_SID
*psid
, gid_t gid
)
686 struct gid_sid_cache
*pc
;
688 if (n_gid_sid_cache
>= MAX_GID_SID_CACHE_SIZE
&& n_gid_sid_cache
> TURNOVER_GID_SID_CACHE_SIZE
) {
689 /* Delete the last TURNOVER_GID_SID_CACHE_SIZE entries. */
690 struct gid_sid_cache
*pc_next
;
693 for (i
= 0, pc
= gid_sid_cache_head
; i
< (n_gid_sid_cache
- TURNOVER_GID_SID_CACHE_SIZE
); i
++, pc
= pc
->next
)
695 for(; pc
; pc
= pc_next
) {
697 DLIST_REMOVE(gid_sid_cache_head
,pc
);
703 pc
= (struct gid_sid_cache
*)malloc(sizeof(struct gid_sid_cache
));
707 sid_copy(&pc
->sid
, psid
);
708 DLIST_ADD(gid_sid_cache_head
, pc
);
712 /*****************************************************************
713 *THE CANONICAL* convert uid_t to SID function.
714 *****************************************************************/
716 NTSTATUS
uid_to_sid(DOM_SID
*psid
, uid_t uid
)
723 if (fetch_sid_from_uid_cache(psid
, uid
))
724 return ( psid
? NT_STATUS_OK
: NT_STATUS_UNSUCCESSFUL
);
726 if (lp_idmap_uid(&low
, &high
) && uid
>= low
&& uid
<= high
) {
727 if (winbind_uid_to_sid(psid
, uid
)) {
729 DEBUG(10,("uid_to_sid: winbindd %u -> %s\n",
730 (unsigned int)uid
, sid_to_string(sid
, psid
)));
733 store_uid_sid_cache(psid
, uid
);
734 return ( psid
? NT_STATUS_OK
: NT_STATUS_UNSUCCESSFUL
);
738 if (!local_uid_to_sid(psid
, uid
)) {
739 DEBUG(10,("uid_to_sid: local %u failed to map to sid\n", (unsigned int)uid
));
740 return NT_STATUS_UNSUCCESSFUL
;
743 DEBUG(10,("uid_to_sid: local %u -> %s\n", (unsigned int)uid
, sid_to_string(sid
, psid
)));
745 store_uid_sid_cache(psid
, uid
);
749 /*****************************************************************
750 *THE CANONICAL* convert gid_t to SID function.
751 *****************************************************************/
753 NTSTATUS
gid_to_sid(DOM_SID
*psid
, gid_t gid
)
760 if (fetch_sid_from_gid_cache(psid
, gid
))
761 return ( psid
? NT_STATUS_OK
: NT_STATUS_UNSUCCESSFUL
);
763 if (lp_idmap_gid(&low
, &high
) && gid
>= low
&& gid
<= high
) {
764 if (winbind_gid_to_sid(psid
, gid
)) {
766 DEBUG(10,("gid_to_sid: winbindd %u -> %s\n",
767 (unsigned int)gid
, sid_to_string(sid
, psid
)));
770 store_gid_sid_cache(psid
, gid
);
771 return ( psid
? NT_STATUS_OK
: NT_STATUS_UNSUCCESSFUL
);
775 if (!local_gid_to_sid(psid
, gid
)) {
776 DEBUG(10,("gid_to_sid: local %u failed to map to sid\n", (unsigned int)gid
));
777 return NT_STATUS_UNSUCCESSFUL
;
780 DEBUG(10,("gid_to_sid: local %u -> %s\n", (unsigned int)gid
, sid_to_string(sid
, psid
)));
782 store_gid_sid_cache(psid
, gid
);
786 /*****************************************************************
787 *THE CANONICAL* convert SID to uid function.
788 *****************************************************************/
790 NTSTATUS
sid_to_uid(const DOM_SID
*psid
, uid_t
*puid
)
792 fstring dom_name
, name
, sid_str
;
793 enum SID_NAME_USE name_type
;
795 if (fetch_uid_from_cache(puid
, psid
))
798 /* if this is our SID then go straight to a local lookup */
800 if ( sid_compare_domain(get_global_sam_sid(), psid
) == 0 ) {
801 DEBUG(10,("sid_to_uid: my domain (%s) - trying local.\n",
802 sid_string_static(psid
) ));
804 if ( local_sid_to_uid(puid
, psid
, &name_type
) )
807 DEBUG(10,("sid_to_uid: local lookup failed\n"));
809 return NT_STATUS_UNSUCCESSFUL
;
812 /* If it is not our local domain, only hope is winbindd */
814 if ( !winbind_lookup_sid(psid
, dom_name
, name
, &name_type
) ) {
815 DEBUG(10,("sid_to_uid: winbind lookup for non-local sid %s failed\n",
816 sid_string_static(psid
) ));
818 return NT_STATUS_UNSUCCESSFUL
;
821 /* If winbindd does know the SID, ensure this is a user */
823 if (name_type
!= SID_NAME_USER
) {
824 DEBUG(10,("sid_to_uid: winbind lookup succeeded but SID is not a user (%u)\n",
825 (unsigned int)name_type
));
826 return NT_STATUS_INVALID_PARAMETER
;
829 /* get the uid. Has to work or else we are dead in the water */
831 if ( !winbind_sid_to_uid(puid
, psid
) ) {
832 DEBUG(10,("sid_to_uid: winbind failed to allocate a new uid for sid %s\n",
833 sid_to_string(sid_str
, psid
) ));
834 return NT_STATUS_UNSUCCESSFUL
;
838 DEBUG(10,("sid_to_uid: %s -> %u\n", sid_to_string(sid_str
, psid
),
839 (unsigned int)*puid
));
841 store_uid_sid_cache(psid
, *puid
);
845 /*****************************************************************
846 *THE CANONICAL* convert SID to gid function.
847 Group mapping is used for gids that maps to Wellknown SIDs
848 *****************************************************************/
850 NTSTATUS
sid_to_gid(const DOM_SID
*psid
, gid_t
*pgid
)
852 fstring dom_name
, name
, sid_str
;
853 enum SID_NAME_USE name_type
;
855 if (fetch_gid_from_cache(pgid
, psid
))
859 * First we must look up the name and decide if this is a group sid.
860 * Group mapping can deal with foreign SIDs
863 if (!winbind_lookup_sid(psid
, dom_name
, name
, &name_type
)) {
864 DEBUG(10,("sid_to_gid: winbind lookup for sid %s failed - trying local.\n",
865 sid_to_string(sid_str
, psid
) ));
867 if ( local_sid_to_gid(pgid
, psid
, &name_type
) )
870 DEBUG(10,("sid_to_gid: no one knows this SID\n"));
872 return NT_STATUS_UNSUCCESSFUL
;
875 /* winbindd knows it; Ensure this is a group sid */
877 if ((name_type
!= SID_NAME_DOM_GRP
) && (name_type
!= SID_NAME_ALIAS
) && (name_type
!= SID_NAME_WKN_GRP
)) {
878 DEBUG(10,("sid_to_gid: winbind lookup succeeded but SID is not a known group (%u)\n",
879 (unsigned int)name_type
));
881 /* winbindd is running and knows about this SID. Just the wrong type.
882 Don't fallback to a local lookup here */
884 return NT_STATUS_INVALID_PARAMETER
;
887 /* winbindd knows it and it is a type of group; sid_to_gid must succeed
888 or we are dead in the water */
890 if ( !winbind_sid_to_gid(pgid
, psid
) ) {
891 DEBUG(10,("sid_to_uid: winbind failed to allocate a new gid for sid %s\n",
892 sid_to_string(sid_str
, psid
) ));
893 return NT_STATUS_UNSUCCESSFUL
;
897 DEBUG(10,("sid_to_gid: %s -> %u\n", sid_to_string(sid_str
, psid
),
898 (unsigned int)*pgid
));
900 store_gid_sid_cache(psid
, *pgid
);