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 */
30 #include "../librpc/gen_ndr/netlogon.h"
31 #include "../libcli/security/security.h"
33 /****************************************************************************
34 Check for a SID in an struct security_token
35 ****************************************************************************/
37 bool nt_token_check_sid ( const struct dom_sid *sid, const struct security_token *token )
42 return security_token_has_sid(token, sid);
45 bool nt_token_check_domain_rid( struct security_token *token, uint32 rid )
47 struct dom_sid domain_sid;
49 /* if we are a domain member, the get the domain SID, else for
50 a DC or standalone server, use our own SID */
52 if ( lp_server_role() == ROLE_DOMAIN_MEMBER ) {
53 if ( !secrets_fetch_domain_sid( lp_workgroup(),
55 DEBUG(1,("nt_token_check_domain_rid: Cannot lookup "
56 "SID for domain [%s]\n", lp_workgroup()));
61 sid_copy( &domain_sid, get_global_sam_sid() );
63 sid_append_rid( &domain_sid, rid );
65 return nt_token_check_sid( &domain_sid, token );\
68 /******************************************************************************
69 Create a token for the root user to be used internally by smbd.
70 This is similar to running under the context of the LOCAL_SYSTEM account
71 in Windows. This is a read-only token. Do not modify it or free() it.
72 Create a copy if you need to change it.
73 ******************************************************************************/
75 struct security_token *get_root_nt_token( void )
77 struct security_token *token, *for_cache;
78 struct dom_sid u_sid, g_sid;
82 cache_data = memcache_lookup_talloc(
83 NULL, SINGLETON_CACHE_TALLOC,
84 data_blob_string_const_null("root_nt_token"));
86 if (cache_data != NULL) {
87 return talloc_get_type_abort(
88 cache_data, struct security_token);
91 if ( !(pw = sys_getpwuid(0)) ) {
92 if ( !(pw = sys_getpwnam("root")) ) {
93 DEBUG(0,("get_root_nt_token: both sys_getpwuid(0) "
94 "and sys_getpwnam(\"root\") failed!\n"));
99 /* get the user and primary group SIDs; although the
100 BUILTIN\Administrators SId is really the one that matters here */
102 uid_to_sid(&u_sid, pw->pw_uid);
103 gid_to_sid(&g_sid, pw->pw_gid);
105 token = create_local_nt_token(talloc_tos(), &u_sid, False,
106 1, &global_sid_Builtin_Administrators);
108 security_token_set_privilege(token, SEC_PRIV_DISK_OPERATOR);
113 NULL, SINGLETON_CACHE_TALLOC,
114 data_blob_string_const_null("root_nt_token"), &for_cache);
121 * Add alias SIDs from memberships within the partially created token SID list
124 NTSTATUS add_aliases(const struct dom_sid *domain_sid,
125 struct security_token *token)
128 size_t i, num_aliases;
132 if (!(tmp_ctx = talloc_init("add_aliases"))) {
133 return NT_STATUS_NO_MEMORY;
139 status = pdb_enum_alias_memberships(tmp_ctx, domain_sid,
142 &aliases, &num_aliases);
144 if (!NT_STATUS_IS_OK(status)) {
145 DEBUG(10, ("pdb_enum_alias_memberships failed: %s\n",
150 for (i=0; i<num_aliases; i++) {
151 struct dom_sid alias_sid;
152 sid_compose(&alias_sid, domain_sid, aliases[i]);
153 status = add_sid_to_array_unique(token, &alias_sid,
156 if (!NT_STATUS_IS_OK(status)) {
157 DEBUG(0, ("add_sid_to_array failed\n"));
163 TALLOC_FREE(tmp_ctx);
167 /*******************************************************************
168 *******************************************************************/
170 static NTSTATUS add_builtin_administrators(struct security_token *token,
171 const struct dom_sid *dom_sid)
173 struct dom_sid domadm;
176 /* nothing to do if we aren't in a domain */
178 if ( !(IS_DC || lp_server_role()==ROLE_DOMAIN_MEMBER) ) {
182 /* Find the Domain Admins SID */
185 sid_copy( &domadm, get_global_sam_sid() );
187 sid_copy(&domadm, dom_sid);
189 sid_append_rid( &domadm, DOMAIN_RID_ADMINS );
191 /* Add Administrators if the user beloongs to Domain Admins */
193 if ( nt_token_check_sid( &domadm, token ) ) {
194 status = add_sid_to_array(token,
195 &global_sid_Builtin_Administrators,
196 &token->sids, &token->num_sids);
197 if (!NT_STATUS_IS_OK(status)) {
206 * Create the requested BUILTIN if it doesn't already exist. This requires
207 * winbindd to be running.
209 * @param[in] rid BUILTIN rid to create
210 * @return Normal NTSTATUS return.
212 static NTSTATUS create_builtin(uint32 rid)
214 NTSTATUS status = NT_STATUS_OK;
218 if (!sid_compose(&sid, &global_sid_Builtin, rid)) {
219 return NT_STATUS_NO_SUCH_ALIAS;
222 if (!sid_to_gid(&sid, &gid)) {
223 if (!lp_winbind_nested_groups() || !winbind_ping()) {
224 return NT_STATUS_PROTOCOL_UNREACHABLE;
226 status = pdb_create_builtin_alias(rid);
232 * Add sid as a member of builtin_sid.
234 * @param[in] builtin_sid An existing builtin group.
235 * @param[in] dom_sid sid to add as a member of builtin_sid.
236 * @return Normal NTSTATUS return
238 static NTSTATUS add_sid_to_builtin(const struct dom_sid *builtin_sid,
239 const struct dom_sid *dom_sid)
241 NTSTATUS status = NT_STATUS_OK;
243 if (!dom_sid || !builtin_sid) {
244 return NT_STATUS_INVALID_PARAMETER;
247 status = pdb_add_aliasmem(builtin_sid, dom_sid);
249 if (NT_STATUS_EQUAL(status, NT_STATUS_MEMBER_IN_ALIAS)) {
250 DEBUG(5, ("add_sid_to_builtin %s is already a member of %s\n",
251 sid_string_dbg(dom_sid),
252 sid_string_dbg(builtin_sid)));
256 if (!NT_STATUS_IS_OK(status)) {
257 DEBUG(4, ("add_sid_to_builtin %s could not be added to %s: "
258 "%s\n", sid_string_dbg(dom_sid),
259 sid_string_dbg(builtin_sid), nt_errstr(status)));
264 /*******************************************************************
265 *******************************************************************/
267 NTSTATUS create_builtin_users(const struct dom_sid *dom_sid)
270 struct dom_sid dom_users;
272 status = create_builtin(BUILTIN_RID_USERS);
273 if ( !NT_STATUS_IS_OK(status) ) {
274 DEBUG(5,("create_builtin_users: Failed to create Users\n"));
278 /* add domain users */
279 if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
280 && sid_compose(&dom_users, dom_sid, DOMAIN_RID_USERS))
282 status = add_sid_to_builtin(&global_sid_Builtin_Users,
289 /*******************************************************************
290 *******************************************************************/
292 NTSTATUS create_builtin_administrators(const struct dom_sid *dom_sid)
295 struct dom_sid dom_admins, root_sid;
297 enum lsa_SidType type;
301 status = create_builtin(BUILTIN_RID_ADMINISTRATORS);
302 if ( !NT_STATUS_IS_OK(status) ) {
303 DEBUG(5,("create_builtin_administrators: Failed to create Administrators\n"));
307 /* add domain admins */
308 if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
309 && sid_compose(&dom_admins, dom_sid, DOMAIN_RID_ADMINS))
311 status = add_sid_to_builtin(&global_sid_Builtin_Administrators,
313 if (!NT_STATUS_IS_OK(status)) {
319 if ( (ctx = talloc_init("create_builtin_administrators")) == NULL ) {
320 return NT_STATUS_NO_MEMORY;
322 fstr_sprintf( root_name, "%s\\root", get_global_sam_name() );
323 ret = lookup_name(ctx, root_name, LOOKUP_NAME_DOMAIN, NULL, NULL,
328 status = add_sid_to_builtin(&global_sid_Builtin_Administrators,
335 static NTSTATUS finalize_local_nt_token(struct security_token *result,
338 NTSTATUS create_local_nt_token_from_info3(TALLOC_CTX *mem_ctx,
340 struct netr_SamInfo3 *info3,
341 struct extra_auth_info *extra,
342 struct security_token **ntok)
344 struct security_token *usrtok = NULL;
348 DEBUG(10, ("Create local NT token for %s\n",
349 info3->base.account_name.string));
351 usrtok = talloc_zero(mem_ctx, struct security_token);
353 DEBUG(0, ("talloc failed\n"));
354 return NT_STATUS_NO_MEMORY;
357 /* Add the user and primary group sid FIRST */
358 /* check if the user rid is the special "Domain Guests" rid.
359 * If so pick the first sid for the extra sids instead as it
360 * is a local fake account */
361 usrtok->sids = talloc_array(usrtok, struct dom_sid, 2);
364 return NT_STATUS_NO_MEMORY;
366 usrtok->num_sids = 2;
369 if (info3->base.rid == (uint32_t)(-1)) {
370 /* this is a signal the user was fake and generated,
371 * the actual SID we want to use is stored in the extra
373 if (is_null_sid(&extra->user_sid)) {
374 /* we couldn't find the user sid, bail out */
375 DEBUG(3, ("Invalid user SID\n"));
377 return NT_STATUS_UNSUCCESSFUL;
379 sid_copy(&usrtok->sids[0], &extra->user_sid);
381 sid_copy(&usrtok->sids[0], info3->base.domain_sid);
382 sid_append_rid(&usrtok->sids[0], info3->base.rid);
386 if (info3->base.primary_gid == (uint32_t)(-1)) {
387 /* this is a signal the user was fake and generated,
388 * the actual SID we want to use is stored in the extra
390 if (is_null_sid(&extra->pgid_sid)) {
391 /* we couldn't find the user sid, bail out */
392 DEBUG(3, ("Invalid group SID\n"));
394 return NT_STATUS_UNSUCCESSFUL;
396 sid_copy(&usrtok->sids[1], &extra->pgid_sid);
398 sid_copy(&usrtok->sids[1], info3->base.domain_sid);
399 sid_append_rid(&usrtok->sids[1],
400 info3->base.primary_gid);
403 /* Now the SIDs we got from authentication. These are the ones from
404 * the info3 struct or from the pdb_enum_group_memberships, depending
405 * on who authenticated the user.
406 * Note that we start the for loop at "1" here, we already added the
407 * first group sid as primary above. */
409 for (i = 0; i < info3->base.groups.count; i++) {
410 struct dom_sid tmp_sid;
412 sid_copy(&tmp_sid, info3->base.domain_sid);
413 sid_append_rid(&tmp_sid, info3->base.groups.rids[i].rid);
415 status = add_sid_to_array_unique(usrtok, &tmp_sid,
418 if (!NT_STATUS_IS_OK(status)) {
419 DEBUG(3, ("Failed to add SID to nt token\n"));
425 /* now also add extra sids if they are not the special user/group
427 for (i = 0; i < info3->sidcount; i++) {
428 status = add_sid_to_array_unique(usrtok,
432 if (!NT_STATUS_IS_OK(status)) {
433 DEBUG(3, ("Failed to add SID to nt token\n"));
439 status = finalize_local_nt_token(usrtok, is_guest);
440 if (!NT_STATUS_IS_OK(status)) {
441 DEBUG(3, ("Failed to finalize nt token\n"));
450 /*******************************************************************
451 Create a NT token for the user, expanding local aliases
452 *******************************************************************/
454 struct security_token *create_local_nt_token(TALLOC_CTX *mem_ctx,
455 const struct dom_sid *user_sid,
458 const struct dom_sid *groupsids)
460 struct security_token *result = NULL;
464 DEBUG(10, ("Create local NT token for %s\n",
465 sid_string_dbg(user_sid)));
467 if (!(result = TALLOC_ZERO_P(mem_ctx, struct security_token))) {
468 DEBUG(0, ("talloc failed\n"));
472 /* Add the user and primary group sid */
474 status = add_sid_to_array(result, user_sid,
475 &result->sids, &result->num_sids);
476 if (!NT_STATUS_IS_OK(status)) {
481 /* For guest, num_groupsids may be zero. */
483 status = add_sid_to_array(result, &groupsids[0],
486 if (!NT_STATUS_IS_OK(status)) {
492 /* Now the SIDs we got from authentication. These are the ones from
493 * the info3 struct or from the pdb_enum_group_memberships, depending
494 * on who authenticated the user.
495 * Note that we start the for loop at "1" here, we already added the
496 * first group sid as primary above. */
498 for (i=1; i<num_groupsids; i++) {
499 status = add_sid_to_array_unique(result, &groupsids[i],
502 if (!NT_STATUS_IS_OK(status)) {
508 status = finalize_local_nt_token(result, is_guest);
509 if (!NT_STATUS_IS_OK(status)) {
517 static NTSTATUS finalize_local_nt_token(struct security_token *result,
520 struct dom_sid dom_sid;
524 /* Add in BUILTIN sids */
526 status = add_sid_to_array(result, &global_sid_World,
527 &result->sids, &result->num_sids);
528 if (!NT_STATUS_IS_OK(status)) {
531 status = add_sid_to_array(result, &global_sid_Network,
532 &result->sids, &result->num_sids);
533 if (!NT_STATUS_IS_OK(status)) {
538 status = add_sid_to_array(result, &global_sid_Builtin_Guests,
541 if (!NT_STATUS_IS_OK(status)) {
545 status = add_sid_to_array(result,
546 &global_sid_Authenticated_Users,
549 if (!NT_STATUS_IS_OK(status)) {
554 /* Deal with the BUILTIN\Administrators group. If the SID can
555 be resolved then assume that the add_aliasmem( S-1-5-32 )
558 if (!sid_to_gid(&global_sid_Builtin_Administrators, &gid)) {
561 if (!secrets_fetch_domain_sid(lp_workgroup(), &dom_sid)) {
562 status = NT_STATUS_OK;
563 DEBUG(3, ("Failed to fetch domain sid for %s\n",
566 status = create_builtin_administrators(&dom_sid);
570 if (NT_STATUS_EQUAL(status, NT_STATUS_PROTOCOL_UNREACHABLE)) {
571 /* Add BUILTIN\Administrators directly to token. */
572 status = add_builtin_administrators(result, &dom_sid);
573 if ( !NT_STATUS_IS_OK(status) ) {
574 DEBUG(3, ("Failed to check for local "
575 "Administrators membership (%s)\n",
578 } else if (!NT_STATUS_IS_OK(status)) {
579 DEBUG(2, ("WARNING: Failed to create "
580 "BUILTIN\\Administrators group! Can "
581 "Winbind allocate gids?\n"));
585 /* Deal with the BUILTIN\Users group. If the SID can
586 be resolved then assume that the add_aliasmem( S-1-5-32 )
589 if (!sid_to_gid(&global_sid_Builtin_Users, &gid)) {
592 if (!secrets_fetch_domain_sid(lp_workgroup(), &dom_sid)) {
593 status = NT_STATUS_OK;
594 DEBUG(3, ("Failed to fetch domain sid for %s\n",
597 status = create_builtin_users(&dom_sid);
601 if (!NT_STATUS_EQUAL(status, NT_STATUS_PROTOCOL_UNREACHABLE) &&
602 !NT_STATUS_IS_OK(status))
604 DEBUG(2, ("WARNING: Failed to create BUILTIN\\Users group! "
605 "Can Winbind allocate gids?\n"));
609 /* Deal with local groups */
611 if (lp_winbind_nested_groups()) {
615 /* Now add the aliases. First the one from our local SAM */
617 status = add_aliases(get_global_sam_sid(), result);
619 if (!NT_STATUS_IS_OK(status)) {
624 /* Finally the builtin ones */
626 status = add_aliases(&global_sid_Builtin, result);
628 if (!NT_STATUS_IS_OK(status)) {
636 /* Add privileges based on current user sids */
638 get_privileges_for_sids(&result->privilege_mask, result->sids,
644 /****************************************************************************
645 prints a struct security_token to debug output.
646 ****************************************************************************/
648 void debug_nt_user_token(int dbg_class, int dbg_lev, struct security_token *token)
653 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
657 DEBUGC(dbg_class, dbg_lev,
658 ("NT user token of user %s\n",
659 sid_string_dbg(&token->sids[0]) ));
660 DEBUGADDC(dbg_class, dbg_lev,
661 ("contains %lu SIDs\n", (unsigned long)token->num_sids));
662 for (i = 0; i < token->num_sids; i++)
663 DEBUGADDC(dbg_class, dbg_lev,
664 ("SID[%3lu]: %s\n", (unsigned long)i,
665 sid_string_dbg(&token->sids[i])));
667 DEBUGADDC(dbg_class, dbg_lev,("Privilege mask: 0x%llx\n", (unsigned long long)token->privilege_mask));
670 /****************************************************************************
671 prints a UNIX 'token' to debug output.
672 ****************************************************************************/
674 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid,
675 int n_groups, gid_t *groups)
678 DEBUGC(dbg_class, dbg_lev,
679 ("UNIX token of user %ld\n", (long int)uid));
681 DEBUGADDC(dbg_class, dbg_lev,
682 ("Primary group is %ld and contains %i supplementary "
683 "groups\n", (long int)gid, n_groups));
684 for (i = 0; i < n_groups; i++)
685 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
686 (long int)groups[i]));
690 * Create an artificial NT token given just a username. (Initially intended
693 * We go through lookup_name() to avoid problems we had with 'winbind use
698 * unmapped unix users: Go directly to nss to find the user's group.
700 * A passdb user: The list of groups is provided by pdb_enum_group_memberships.
702 * If the user is provided by winbind, the primary gid is set to "domain
703 * users" of the user's domain. For an explanation why this is necessary, see
704 * the thread starting at
705 * http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
708 NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username,
710 uid_t *uid, gid_t *gid,
711 char **found_username,
712 struct security_token **token)
714 NTSTATUS result = NT_STATUS_NO_SUCH_USER;
715 TALLOC_CTX *tmp_ctx = talloc_stackframe();
716 struct dom_sid user_sid;
717 enum lsa_SidType type;
719 struct dom_sid *group_sids;
720 struct dom_sid unix_group_sid;
721 uint32_t num_group_sids;
725 if (!lookup_name_smbconf(tmp_ctx, username, LOOKUP_NAME_ALL,
726 NULL, NULL, &user_sid, &type)) {
727 DEBUG(1, ("lookup_name_smbconf for %s failed\n", username));
731 if (type != SID_NAME_USER) {
732 DEBUG(1, ("%s is a %s, not a user\n", username,
733 sid_type_lookup(type)));
737 if (sid_check_is_in_our_domain(&user_sid)) {
739 size_t pdb_num_group_sids;
740 /* This is a passdb user, so ask passdb */
742 struct samu *sam_acct = NULL;
744 if ( !(sam_acct = samu_new( tmp_ctx )) ) {
745 result = NT_STATUS_NO_MEMORY;
750 ret = pdb_getsampwsid(sam_acct, &user_sid);
754 DEBUG(1, ("pdb_getsampwsid(%s) for user %s failed\n",
755 sid_string_dbg(&user_sid), username));
756 DEBUGADD(1, ("Fall back to unix user %s\n", username));
760 result = pdb_enum_group_memberships(tmp_ctx, sam_acct,
762 &pdb_num_group_sids);
763 if (!NT_STATUS_IS_OK(result)) {
764 DEBUG(1, ("enum_group_memberships failed for %s (%s): "
765 "%s\n", username, sid_string_dbg(&user_sid),
767 DEBUGADD(1, ("Fall back to unix user %s\n", username));
770 num_group_sids = pdb_num_group_sids;
772 /* see the smb_panic() in pdb_default_enum_group_memberships */
773 SMB_ASSERT(num_group_sids > 0);
777 /* Ensure we're returning the found_username on the right context. */
778 *found_username = talloc_strdup(mem_ctx,
779 pdb_get_username(sam_acct));
782 * If the SID from lookup_name() was the guest sid, passdb knows
783 * about the mapping of guest sid to lp_guestaccount()
784 * username and will return the unix_pw info for a guest
785 * user. Use it if it's there, else lookup the *uid details
786 * using getpwnam_alloc(). See bug #6291 for details. JRA.
789 /* We must always assign the *uid. */
790 if (sam_acct->unix_pw == NULL) {
791 struct passwd *pwd = getpwnam_alloc(sam_acct, *found_username );
793 DEBUG(10, ("getpwnam_alloc failed for %s\n",
795 result = NT_STATUS_NO_SUCH_USER;
798 result = samu_set_unix(sam_acct, pwd );
799 if (!NT_STATUS_IS_OK(result)) {
800 DEBUG(10, ("samu_set_unix failed for %s\n",
802 result = NT_STATUS_NO_SUCH_USER;
806 *uid = sam_acct->unix_pw->pw_uid;
808 } else if (sid_check_is_in_unix_users(&user_sid)) {
809 size_t getgroups_num_group_sids;
810 /* This is a unix user not in passdb. We need to ask nss
811 * directly, without consulting passdb */
816 * This goto target is used as a fallback for the passdb
817 * case. The concrete bug report is when passdb gave us an
823 if (!sid_to_uid(&user_sid, uid)) {
824 DEBUG(1, ("unix_user case, sid_to_uid for %s (%s) failed\n",
825 username, sid_string_dbg(&user_sid)));
826 result = NT_STATUS_NO_SUCH_USER;
830 uid_to_unix_users_sid(*uid, &user_sid);
832 pass = getpwuid_alloc(tmp_ctx, *uid);
834 DEBUG(1, ("getpwuid(%u) for user %s failed\n",
835 (unsigned int)*uid, username));
839 if (!getgroups_unix_user(tmp_ctx, username, pass->pw_gid,
840 &gids, &getgroups_num_group_sids)) {
841 DEBUG(1, ("getgroups_unix_user for user %s failed\n",
845 num_group_sids = getgroups_num_group_sids;
847 if (num_group_sids) {
848 group_sids = TALLOC_ARRAY(tmp_ctx, struct dom_sid, num_group_sids);
849 if (group_sids == NULL) {
850 DEBUG(1, ("TALLOC_ARRAY failed\n"));
851 result = NT_STATUS_NO_MEMORY;
858 for (i=0; i<num_group_sids; i++) {
859 gid_to_sid(&group_sids[i], gids[i]);
862 /* In getgroups_unix_user we always set the primary gid */
863 SMB_ASSERT(num_group_sids > 0);
867 /* Ensure we're returning the found_username on the right context. */
868 *found_username = talloc_strdup(mem_ctx, pass->pw_name);
871 /* This user is from winbind, force the primary gid to the
872 * user's "domain users" group. Under certain circumstances
873 * (user comes from NT4), this might be a loss of
874 * information. But we can not rely on winbind getting the
875 * correct info. AD might prohibit winbind looking up that
880 /* We must always assign the *uid. */
881 if (!sid_to_uid(&user_sid, uid)) {
882 DEBUG(1, ("winbindd case, sid_to_uid for %s (%s) failed\n",
883 username, sid_string_dbg(&user_sid)));
884 result = NT_STATUS_NO_SUCH_USER;
889 group_sids = TALLOC_ARRAY(tmp_ctx, struct dom_sid, num_group_sids);
890 if (group_sids == NULL) {
891 DEBUG(1, ("TALLOC_ARRAY failed\n"));
892 result = NT_STATUS_NO_MEMORY;
896 sid_copy(&group_sids[0], &user_sid);
897 sid_split_rid(&group_sids[0], &dummy);
898 sid_append_rid(&group_sids[0], DOMAIN_RID_USERS);
900 if (!sid_to_gid(&group_sids[0], gid)) {
901 DEBUG(1, ("sid_to_gid(%s) failed\n",
902 sid_string_dbg(&group_sids[0])));
908 /* Ensure we're returning the found_username on the right context. */
909 *found_username = talloc_strdup(mem_ctx, username);
912 /* Add the "Unix Group" SID for each gid to catch mapped groups
913 and their Unix equivalent. This is to solve the backwards
914 compatibility problem of 'valid users = +ntadmin' where
915 ntadmin has been paired with "Domain Admins" in the group
916 mapping table. Otherwise smb.conf would need to be changed
917 to 'valid user = "Domain Admins"'. --jerry */
919 num_gids = num_group_sids;
920 for ( i=0; i<num_gids; i++ ) {
923 /* don't pickup anything managed by Winbind */
925 if ( lp_idmap_gid(&low, &high) && (gids[i] >= low) && (gids[i] <= high) )
928 gid_to_unix_groups_sid(gids[i], &unix_group_sid);
930 result = add_sid_to_array_unique(tmp_ctx, &unix_group_sid,
931 &group_sids, &num_group_sids);
932 if (!NT_STATUS_IS_OK(result)) {
937 /* Ensure we're creating the nt_token on the right context. */
938 *token = create_local_nt_token(mem_ctx, &user_sid,
939 is_guest, num_group_sids, group_sids);
941 if ((*token == NULL) || (*found_username == NULL)) {
942 result = NT_STATUS_NO_MEMORY;
946 result = NT_STATUS_OK;
948 TALLOC_FREE(tmp_ctx);
952 /***************************************************************************
953 Build upon create_token_from_username:
955 Expensive helper function to figure out whether a user given its name is
956 member of a particular group.
957 ***************************************************************************/
959 bool user_in_group_sid(const char *username, const struct dom_sid *group_sid)
964 char *found_username;
965 struct security_token *token;
967 TALLOC_CTX *mem_ctx = talloc_stackframe();
969 status = create_token_from_username(mem_ctx, username, False,
970 &uid, &gid, &found_username,
973 if (!NT_STATUS_IS_OK(status)) {
974 DEBUG(10, ("could not create token for %s\n", username));
975 TALLOC_FREE(mem_ctx);
979 result = security_token_has_sid(token, group_sid);
981 TALLOC_FREE(mem_ctx);
985 bool user_in_group(const char *username, const char *groupname)
987 TALLOC_CTX *mem_ctx = talloc_stackframe();
988 struct dom_sid group_sid;
991 ret = lookup_name(mem_ctx, groupname, LOOKUP_NAME_ALL,
992 NULL, NULL, &group_sid, NULL);
993 TALLOC_FREE(mem_ctx);
996 DEBUG(10, ("lookup_name for (%s) failed.\n", groupname));
1000 return user_in_group_sid(username, &group_sid);