2 * Unix SMB/CIFS implementation.
3 * Authentication utility functions
4 * Copyright (C) Andrew Tridgell 1992-1998
5 * Copyright (C) Andrew Bartlett 2001
6 * Copyright (C) Jeremy Allison 2000-2001
7 * Copyright (C) Rafal Szczesniak 2002
8 * Copyright (C) Volker Lendecke 2006
9 * Copyright (C) Michael Adam 2007
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 3 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, see <http://www.gnu.org/licenses/>.
25 /* functions moved from auth/auth_util.c to minimize linker deps */
28 #include "system/passwd.h"
32 #include "../librpc/gen_ndr/netlogon.h"
33 #include "../libcli/security/security.h"
34 #include "../lib/util/util_pw.h"
36 #include "lib/privileges.h"
38 /****************************************************************************
39 Check for a SID in an struct security_token
40 ****************************************************************************/
42 bool nt_token_check_sid ( const struct dom_sid
*sid
, const struct security_token
*token
)
47 return security_token_has_sid(token
, sid
);
50 bool nt_token_check_domain_rid( struct security_token
*token
, uint32 rid
)
52 struct dom_sid domain_sid
;
54 /* if we are a domain member, the get the domain SID, else for
55 a DC or standalone server, use our own SID */
57 if ( lp_server_role() == ROLE_DOMAIN_MEMBER
) {
58 if ( !secrets_fetch_domain_sid( lp_workgroup(),
60 DEBUG(1,("nt_token_check_domain_rid: Cannot lookup "
61 "SID for domain [%s]\n", lp_workgroup()));
66 sid_copy( &domain_sid
, get_global_sam_sid() );
68 sid_append_rid( &domain_sid
, rid
);
70 return nt_token_check_sid( &domain_sid
, token
);\
73 /******************************************************************************
74 Create a token for the root user to be used internally by smbd.
75 This is similar to running under the context of the LOCAL_SYSTEM account
76 in Windows. This is a read-only token. Do not modify it or free() it.
77 Create a copy if you need to change it.
78 ******************************************************************************/
80 struct security_token
*get_root_nt_token( void )
82 struct security_token
*token
, *for_cache
;
83 struct dom_sid u_sid
, g_sid
;
87 cache_data
= memcache_lookup_talloc(
88 NULL
, SINGLETON_CACHE_TALLOC
,
89 data_blob_string_const_null("root_nt_token"));
91 if (cache_data
!= NULL
) {
92 return talloc_get_type_abort(
93 cache_data
, struct security_token
);
96 if ( !(pw
= getpwuid(0)) ) {
97 if ( !(pw
= getpwnam("root")) ) {
98 DEBUG(0,("get_root_nt_token: both getpwuid(0) "
99 "and getpwnam(\"root\") failed!\n"));
104 /* get the user and primary group SIDs; although the
105 BUILTIN\Administrators SId is really the one that matters here */
107 uid_to_sid(&u_sid
, pw
->pw_uid
);
108 gid_to_sid(&g_sid
, pw
->pw_gid
);
110 token
= create_local_nt_token(talloc_tos(), &u_sid
, False
,
111 1, &global_sid_Builtin_Administrators
);
113 security_token_set_privilege(token
, SEC_PRIV_DISK_OPERATOR
);
118 NULL
, SINGLETON_CACHE_TALLOC
,
119 data_blob_string_const_null("root_nt_token"), &for_cache
);
126 * Add alias SIDs from memberships within the partially created token SID list
129 NTSTATUS
add_aliases(const struct dom_sid
*domain_sid
,
130 struct security_token
*token
)
133 size_t i
, num_aliases
;
137 if (!(tmp_ctx
= talloc_init("add_aliases"))) {
138 return NT_STATUS_NO_MEMORY
;
144 status
= pdb_enum_alias_memberships(tmp_ctx
, domain_sid
,
147 &aliases
, &num_aliases
);
149 if (!NT_STATUS_IS_OK(status
)) {
150 DEBUG(10, ("pdb_enum_alias_memberships failed: %s\n",
155 for (i
=0; i
<num_aliases
; i
++) {
156 struct dom_sid alias_sid
;
157 sid_compose(&alias_sid
, domain_sid
, aliases
[i
]);
158 status
= add_sid_to_array_unique(token
, &alias_sid
,
161 if (!NT_STATUS_IS_OK(status
)) {
162 DEBUG(0, ("add_sid_to_array failed\n"));
168 TALLOC_FREE(tmp_ctx
);
172 /*******************************************************************
173 *******************************************************************/
175 static NTSTATUS
add_builtin_administrators(struct security_token
*token
,
176 const struct dom_sid
*dom_sid
)
178 struct dom_sid domadm
;
181 /* nothing to do if we aren't in a domain */
183 if ( !(IS_DC
|| lp_server_role()==ROLE_DOMAIN_MEMBER
) ) {
187 /* Find the Domain Admins SID */
190 sid_copy( &domadm
, get_global_sam_sid() );
192 sid_copy(&domadm
, dom_sid
);
194 sid_append_rid( &domadm
, DOMAIN_RID_ADMINS
);
196 /* Add Administrators if the user beloongs to Domain Admins */
198 if ( nt_token_check_sid( &domadm
, token
) ) {
199 status
= add_sid_to_array(token
,
200 &global_sid_Builtin_Administrators
,
201 &token
->sids
, &token
->num_sids
);
202 if (!NT_STATUS_IS_OK(status
)) {
210 static NTSTATUS
finalize_local_nt_token(struct security_token
*result
,
213 NTSTATUS
create_local_nt_token_from_info3(TALLOC_CTX
*mem_ctx
,
215 const struct netr_SamInfo3
*info3
,
216 const struct extra_auth_info
*extra
,
217 struct security_token
**ntok
)
219 struct security_token
*usrtok
= NULL
;
223 DEBUG(10, ("Create local NT token for %s\n",
224 info3
->base
.account_name
.string
));
226 usrtok
= talloc_zero(mem_ctx
, struct security_token
);
228 DEBUG(0, ("talloc failed\n"));
229 return NT_STATUS_NO_MEMORY
;
232 /* Add the user and primary group sid FIRST */
233 /* check if the user rid is the special "Domain Guests" rid.
234 * If so pick the first sid for the extra sids instead as it
235 * is a local fake account */
236 usrtok
->sids
= talloc_array(usrtok
, struct dom_sid
, 2);
239 return NT_STATUS_NO_MEMORY
;
241 usrtok
->num_sids
= 2;
244 if (info3
->base
.rid
== (uint32_t)(-1)) {
245 /* this is a signal the user was fake and generated,
246 * the actual SID we want to use is stored in the extra
248 if (is_null_sid(&extra
->user_sid
)) {
249 /* we couldn't find the user sid, bail out */
250 DEBUG(3, ("Invalid user SID\n"));
252 return NT_STATUS_UNSUCCESSFUL
;
254 sid_copy(&usrtok
->sids
[0], &extra
->user_sid
);
256 sid_copy(&usrtok
->sids
[0], info3
->base
.domain_sid
);
257 sid_append_rid(&usrtok
->sids
[0], info3
->base
.rid
);
261 if (info3
->base
.primary_gid
== (uint32_t)(-1)) {
262 /* this is a signal the user was fake and generated,
263 * the actual SID we want to use is stored in the extra
265 if (is_null_sid(&extra
->pgid_sid
)) {
266 /* we couldn't find the user sid, bail out */
267 DEBUG(3, ("Invalid group SID\n"));
269 return NT_STATUS_UNSUCCESSFUL
;
271 sid_copy(&usrtok
->sids
[1], &extra
->pgid_sid
);
273 sid_copy(&usrtok
->sids
[1], info3
->base
.domain_sid
);
274 sid_append_rid(&usrtok
->sids
[1],
275 info3
->base
.primary_gid
);
278 /* Now the SIDs we got from authentication. These are the ones from
279 * the info3 struct or from the pdb_enum_group_memberships, depending
280 * on who authenticated the user.
281 * Note that we start the for loop at "1" here, we already added the
282 * first group sid as primary above. */
284 for (i
= 0; i
< info3
->base
.groups
.count
; i
++) {
285 struct dom_sid tmp_sid
;
287 sid_copy(&tmp_sid
, info3
->base
.domain_sid
);
288 sid_append_rid(&tmp_sid
, info3
->base
.groups
.rids
[i
].rid
);
290 status
= add_sid_to_array_unique(usrtok
, &tmp_sid
,
293 if (!NT_STATUS_IS_OK(status
)) {
294 DEBUG(3, ("Failed to add SID to nt token\n"));
300 /* now also add extra sids if they are not the special user/group
302 for (i
= 0; i
< info3
->sidcount
; i
++) {
303 status
= add_sid_to_array_unique(usrtok
,
307 if (!NT_STATUS_IS_OK(status
)) {
308 DEBUG(3, ("Failed to add SID to nt token\n"));
314 status
= finalize_local_nt_token(usrtok
, is_guest
);
315 if (!NT_STATUS_IS_OK(status
)) {
316 DEBUG(3, ("Failed to finalize nt token\n"));
325 /*******************************************************************
326 Create a NT token for the user, expanding local aliases
327 *******************************************************************/
329 struct security_token
*create_local_nt_token(TALLOC_CTX
*mem_ctx
,
330 const struct dom_sid
*user_sid
,
333 const struct dom_sid
*groupsids
)
335 struct security_token
*result
= NULL
;
339 DEBUG(10, ("Create local NT token for %s\n",
340 sid_string_dbg(user_sid
)));
342 if (!(result
= talloc_zero(mem_ctx
, struct security_token
))) {
343 DEBUG(0, ("talloc failed\n"));
347 /* Add the user and primary group sid */
349 status
= add_sid_to_array(result
, user_sid
,
350 &result
->sids
, &result
->num_sids
);
351 if (!NT_STATUS_IS_OK(status
)) {
356 /* For guest, num_groupsids may be zero. */
358 status
= add_sid_to_array(result
, &groupsids
[0],
361 if (!NT_STATUS_IS_OK(status
)) {
367 /* Now the SIDs we got from authentication. These are the ones from
368 * the info3 struct or from the pdb_enum_group_memberships, depending
369 * on who authenticated the user.
370 * Note that we start the for loop at "1" here, we already added the
371 * first group sid as primary above. */
373 for (i
=1; i
<num_groupsids
; i
++) {
374 status
= add_sid_to_array_unique(result
, &groupsids
[i
],
377 if (!NT_STATUS_IS_OK(status
)) {
383 status
= finalize_local_nt_token(result
, is_guest
);
384 if (!NT_STATUS_IS_OK(status
)) {
392 static NTSTATUS
finalize_local_nt_token(struct security_token
*result
,
395 struct dom_sid dom_sid
;
399 /* Add in BUILTIN sids */
401 status
= add_sid_to_array(result
, &global_sid_World
,
402 &result
->sids
, &result
->num_sids
);
403 if (!NT_STATUS_IS_OK(status
)) {
406 status
= add_sid_to_array(result
, &global_sid_Network
,
407 &result
->sids
, &result
->num_sids
);
408 if (!NT_STATUS_IS_OK(status
)) {
413 status
= add_sid_to_array(result
, &global_sid_Builtin_Guests
,
416 if (!NT_STATUS_IS_OK(status
)) {
420 status
= add_sid_to_array(result
,
421 &global_sid_Authenticated_Users
,
424 if (!NT_STATUS_IS_OK(status
)) {
429 /* Deal with the BUILTIN\Administrators group. If the SID can
430 be resolved then assume that the add_aliasmem( S-1-5-32 )
433 if (!sid_to_gid(&global_sid_Builtin_Administrators
, &gid
)) {
436 if (!secrets_fetch_domain_sid(lp_workgroup(), &dom_sid
)) {
437 status
= NT_STATUS_OK
;
438 DEBUG(3, ("Failed to fetch domain sid for %s\n",
441 status
= create_builtin_administrators(&dom_sid
);
445 if (NT_STATUS_EQUAL(status
, NT_STATUS_PROTOCOL_UNREACHABLE
)) {
446 /* Add BUILTIN\Administrators directly to token. */
447 status
= add_builtin_administrators(result
, &dom_sid
);
448 if ( !NT_STATUS_IS_OK(status
) ) {
449 DEBUG(3, ("Failed to check for local "
450 "Administrators membership (%s)\n",
453 } else if (!NT_STATUS_IS_OK(status
)) {
454 DEBUG(2, ("WARNING: Failed to create "
455 "BUILTIN\\Administrators group! Can "
456 "Winbind allocate gids?\n"));
460 /* Deal with the BUILTIN\Users group. If the SID can
461 be resolved then assume that the add_aliasmem( S-1-5-32 )
464 if (!sid_to_gid(&global_sid_Builtin_Users
, &gid
)) {
467 if (!secrets_fetch_domain_sid(lp_workgroup(), &dom_sid
)) {
468 status
= NT_STATUS_OK
;
469 DEBUG(3, ("Failed to fetch domain sid for %s\n",
472 status
= create_builtin_users(&dom_sid
);
476 if (!NT_STATUS_EQUAL(status
, NT_STATUS_PROTOCOL_UNREACHABLE
) &&
477 !NT_STATUS_IS_OK(status
))
479 DEBUG(2, ("WARNING: Failed to create BUILTIN\\Users group! "
480 "Can Winbind allocate gids?\n"));
484 /* Deal with local groups */
486 if (lp_winbind_nested_groups()) {
490 /* Now add the aliases. First the one from our local SAM */
492 status
= add_aliases(get_global_sam_sid(), result
);
494 if (!NT_STATUS_IS_OK(status
)) {
499 /* Finally the builtin ones */
501 status
= add_aliases(&global_sid_Builtin
, result
);
503 if (!NT_STATUS_IS_OK(status
)) {
511 /* Add privileges based on current user sids */
513 get_privileges_for_sids(&result
->privilege_mask
, result
->sids
,
519 /****************************************************************************
520 prints a UNIX 'token' to debug output.
521 ****************************************************************************/
523 void debug_unix_user_token(int dbg_class
, int dbg_lev
, uid_t uid
, gid_t gid
,
524 int n_groups
, gid_t
*groups
)
527 DEBUGC(dbg_class
, dbg_lev
,
528 ("UNIX token of user %ld\n", (long int)uid
));
530 DEBUGADDC(dbg_class
, dbg_lev
,
531 ("Primary group is %ld and contains %i supplementary "
532 "groups\n", (long int)gid
, n_groups
));
533 for (i
= 0; i
< n_groups
; i
++)
534 DEBUGADDC(dbg_class
, dbg_lev
, ("Group[%3i]: %ld\n", i
,
535 (long int)groups
[i
]));
539 * Create an artificial NT token given just a domain SID.
543 * unmapped unix users: Go directly to nss to find the user's group.
545 * A passdb user: The list of groups is provided by pdb_enum_group_memberships.
547 * If the user is provided by winbind, the primary gid is set to "domain
548 * users" of the user's domain. For an explanation why this is necessary, see
549 * the thread starting at
550 * http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
553 static NTSTATUS
create_token_from_sid(TALLOC_CTX
*mem_ctx
,
554 const struct dom_sid
*user_sid
,
556 uid_t
*uid
, gid_t
*gid
,
557 char **found_username
,
558 struct security_token
**token
)
560 NTSTATUS result
= NT_STATUS_NO_SUCH_USER
;
561 TALLOC_CTX
*tmp_ctx
= talloc_stackframe();
563 struct dom_sid
*group_sids
;
564 struct dom_sid unix_group_sid
;
565 uint32_t num_group_sids
;
571 if (sid_check_is_in_our_sam(user_sid
)) {
573 uint32_t pdb_num_group_sids
;
574 /* This is a passdb user, so ask passdb */
576 struct samu
*sam_acct
= NULL
;
578 if ( !(sam_acct
= samu_new( tmp_ctx
)) ) {
579 result
= NT_STATUS_NO_MEMORY
;
584 ret
= pdb_getsampwsid(sam_acct
, user_sid
);
588 DEBUG(1, ("pdb_getsampwsid(%s) failed\n",
589 sid_string_dbg(user_sid
)));
590 DEBUGADD(1, ("Fall back to unix user\n"));
594 result
= pdb_enum_group_memberships(tmp_ctx
, sam_acct
,
596 &pdb_num_group_sids
);
597 if (!NT_STATUS_IS_OK(result
)) {
598 DEBUG(1, ("enum_group_memberships failed for %s: "
599 "%s\n", sid_string_dbg(user_sid
),
601 DEBUGADD(1, ("Fall back to unix uid lookup\n"));
604 num_group_sids
= pdb_num_group_sids
;
606 /* see the smb_panic() in pdb_default_enum_group_memberships */
607 SMB_ASSERT(num_group_sids
> 0);
611 /* Ensure we're returning the found_username on the right context. */
612 *found_username
= talloc_strdup(mem_ctx
,
613 pdb_get_username(sam_acct
));
615 if (*found_username
== NULL
) {
616 result
= NT_STATUS_NO_MEMORY
;
621 * If the SID from lookup_name() was the guest sid, passdb knows
622 * about the mapping of guest sid to lp_guestaccount()
623 * username and will return the unix_pw info for a guest
624 * user. Use it if it's there, else lookup the *uid details
625 * using Get_Pwnam_alloc(). See bug #6291 for details. JRA.
628 /* We must always assign the *uid. */
629 if (sam_acct
->unix_pw
== NULL
) {
630 struct passwd
*pwd
= Get_Pwnam_alloc(sam_acct
, *found_username
);
632 DEBUG(10, ("Get_Pwnam_alloc failed for %s\n",
634 result
= NT_STATUS_NO_SUCH_USER
;
637 result
= samu_set_unix(sam_acct
, pwd
);
638 if (!NT_STATUS_IS_OK(result
)) {
639 DEBUG(10, ("samu_set_unix failed for %s\n",
641 result
= NT_STATUS_NO_SUCH_USER
;
645 *uid
= sam_acct
->unix_pw
->pw_uid
;
647 } else if (sid_check_is_in_unix_users(user_sid
)) {
648 struct dom_sid tmp_sid
;
649 uint32_t getgroups_num_group_sids
;
650 /* This is a unix user not in passdb. We need to ask nss
651 * directly, without consulting passdb */
656 * This goto target is used as a fallback for the passdb
657 * case. The concrete bug report is when passdb gave us an
663 if (!sid_to_uid(user_sid
, uid
)) {
664 DEBUG(1, ("unix_user case, sid_to_uid for %s failed\n",
665 sid_string_dbg(user_sid
)));
666 result
= NT_STATUS_NO_SUCH_USER
;
670 uid_to_unix_users_sid(*uid
, &tmp_sid
);
673 pass
= getpwuid_alloc(tmp_ctx
, *uid
);
675 DEBUG(1, ("getpwuid(%u) failed\n",
676 (unsigned int)*uid
));
680 if (!getgroups_unix_user(tmp_ctx
, pass
->pw_name
, pass
->pw_gid
,
681 &gids
, &getgroups_num_group_sids
)) {
682 DEBUG(1, ("getgroups_unix_user for user %s failed\n",
686 num_group_sids
= getgroups_num_group_sids
;
688 if (num_group_sids
) {
689 group_sids
= talloc_array(tmp_ctx
, struct dom_sid
, num_group_sids
);
690 if (group_sids
== NULL
) {
691 DEBUG(1, ("talloc_array failed\n"));
692 result
= NT_STATUS_NO_MEMORY
;
699 for (i
=0; i
<num_group_sids
; i
++) {
700 gid_to_sid(&group_sids
[i
], gids
[i
]);
703 /* In getgroups_unix_user we always set the primary gid */
704 SMB_ASSERT(num_group_sids
> 0);
708 /* Ensure we're returning the found_username on the right context. */
709 *found_username
= talloc_strdup(mem_ctx
, pass
->pw_name
);
710 if (*found_username
== NULL
) {
711 result
= NT_STATUS_NO_MEMORY
;
716 /* This user is from winbind, force the primary gid to the
717 * user's "domain users" group. Under certain circumstances
718 * (user comes from NT4), this might be a loss of
719 * information. But we can not rely on winbind getting the
720 * correct info. AD might prohibit winbind looking up that
723 /* We must always assign the *uid. */
724 if (!sid_to_uid(user_sid
, uid
)) {
725 DEBUG(1, ("winbindd case, sid_to_uid for %s failed\n",
726 sid_string_dbg(user_sid
)));
727 result
= NT_STATUS_NO_SUCH_USER
;
732 group_sids
= talloc_array(tmp_ctx
, struct dom_sid
, num_group_sids
);
733 if (group_sids
== NULL
) {
734 DEBUG(1, ("talloc_array failed\n"));
735 result
= NT_STATUS_NO_MEMORY
;
739 sid_copy(&group_sids
[0], user_sid
);
740 sid_split_rid(&group_sids
[0], NULL
);
741 sid_append_rid(&group_sids
[0], DOMAIN_RID_USERS
);
743 if (!sid_to_gid(&group_sids
[0], gid
)) {
744 DEBUG(1, ("sid_to_gid(%s) failed\n",
745 sid_string_dbg(&group_sids
[0])));
751 *found_username
= NULL
;
754 /* Add the "Unix Group" SID for each gid to catch mapped groups
755 and their Unix equivalent. This is to solve the backwards
756 compatibility problem of 'valid users = +ntadmin' where
757 ntadmin has been paired with "Domain Admins" in the group
758 mapping table. Otherwise smb.conf would need to be changed
759 to 'valid user = "Domain Admins"'. --jerry */
761 num_gids
= num_group_sids
;
762 range_ok
= lp_idmap_default_range(&low
, &high
);
763 for ( i
=0; i
<num_gids
; i
++ ) {
765 /* don't pickup anything managed by Winbind */
766 if (range_ok
&& (gids
[i
] >= low
) && (gids
[i
] <= high
)) {
770 gid_to_unix_groups_sid(gids
[i
], &unix_group_sid
);
772 result
= add_sid_to_array_unique(tmp_ctx
, &unix_group_sid
,
773 &group_sids
, &num_group_sids
);
774 if (!NT_STATUS_IS_OK(result
)) {
779 /* Ensure we're creating the nt_token on the right context. */
780 *token
= create_local_nt_token(mem_ctx
, user_sid
,
781 is_guest
, num_group_sids
, group_sids
);
783 if (*token
== NULL
) {
784 result
= NT_STATUS_NO_MEMORY
;
788 result
= NT_STATUS_OK
;
790 TALLOC_FREE(tmp_ctx
);
795 * Create an artificial NT token given just a username. (Initially intended
798 * We go through lookup_name() to avoid problems we had with 'winbind use
803 * unmapped unix users: Go directly to nss to find the user's group.
805 * A passdb user: The list of groups is provided by pdb_enum_group_memberships.
807 * If the user is provided by winbind, the primary gid is set to "domain
808 * users" of the user's domain. For an explanation why this is necessary, see
809 * the thread starting at
810 * http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
813 NTSTATUS
create_token_from_username(TALLOC_CTX
*mem_ctx
, const char *username
,
815 uid_t
*uid
, gid_t
*gid
,
816 char **found_username
,
817 struct security_token
**token
)
819 NTSTATUS result
= NT_STATUS_NO_SUCH_USER
;
820 TALLOC_CTX
*tmp_ctx
= talloc_stackframe();
821 struct dom_sid user_sid
;
822 enum lsa_SidType type
;
824 if (!lookup_name_smbconf(tmp_ctx
, username
, LOOKUP_NAME_ALL
,
825 NULL
, NULL
, &user_sid
, &type
)) {
826 DEBUG(1, ("lookup_name_smbconf for %s failed\n", username
));
830 if (type
!= SID_NAME_USER
) {
831 DEBUG(1, ("%s is a %s, not a user\n", username
,
832 sid_type_lookup(type
)));
836 result
= create_token_from_sid(mem_ctx
, &user_sid
, is_guest
, uid
, gid
, found_username
, token
);
838 if (!NT_STATUS_IS_OK(result
)) {
843 * If result == NT_STATUS_OK then
844 * we know we have a valid token. Ensure
845 * we also have a valid username to match.
848 if (*found_username
== NULL
) {
849 *found_username
= talloc_strdup(mem_ctx
, username
);
850 if (*found_username
== NULL
) {
851 result
= NT_STATUS_NO_MEMORY
;
856 TALLOC_FREE(tmp_ctx
);
860 /***************************************************************************
861 Build upon create_token_from_sid:
863 Expensive helper function to figure out whether a user given its sid is
864 member of a particular group.
865 ***************************************************************************/
867 bool user_sid_in_group_sid(const struct dom_sid
*sid
, const struct dom_sid
*group_sid
)
872 char *found_username
;
873 struct security_token
*token
;
875 enum lsa_SidType type
;
876 TALLOC_CTX
*mem_ctx
= talloc_stackframe();
878 if (!lookup_sid(mem_ctx
, sid
,
879 NULL
, NULL
, &type
)) {
880 DEBUG(1, ("lookup_sid for %s failed\n", dom_sid_string(mem_ctx
, sid
)));
884 if (type
!= SID_NAME_USER
) {
885 DEBUG(5, ("%s is a %s, not a user\n", dom_sid_string(mem_ctx
, sid
),
886 sid_type_lookup(type
)));
890 status
= create_token_from_sid(mem_ctx
, sid
, False
,
891 &uid
, &gid
, &found_username
,
894 if (!NT_STATUS_IS_OK(status
)) {
895 DEBUG(10, ("could not create token for %s\n", dom_sid_string(mem_ctx
, sid
)));
899 result
= security_token_has_sid(token
, group_sid
);
902 TALLOC_FREE(mem_ctx
);
906 /***************************************************************************
907 Build upon create_token_from_username:
909 Expensive helper function to figure out whether a user given its name is
910 member of a particular group.
911 ***************************************************************************/
913 bool user_in_group_sid(const char *username
, const struct dom_sid
*group_sid
)
918 char *found_username
;
919 struct security_token
*token
;
921 TALLOC_CTX
*mem_ctx
= talloc_stackframe();
923 status
= create_token_from_username(mem_ctx
, username
, False
,
924 &uid
, &gid
, &found_username
,
927 if (!NT_STATUS_IS_OK(status
)) {
928 DEBUG(10, ("could not create token for %s\n", username
));
929 TALLOC_FREE(mem_ctx
);
933 result
= security_token_has_sid(token
, group_sid
);
935 TALLOC_FREE(mem_ctx
);
939 bool user_in_group(const char *username
, const char *groupname
)
941 TALLOC_CTX
*mem_ctx
= talloc_stackframe();
942 struct dom_sid group_sid
;
945 ret
= lookup_name(mem_ctx
, groupname
, LOOKUP_NAME_ALL
,
946 NULL
, NULL
, &group_sid
, NULL
);
947 TALLOC_FREE(mem_ctx
);
950 DEBUG(10, ("lookup_name for (%s) failed.\n", groupname
));
954 return user_in_group_sid(username
, &group_sid
);