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 */
29 /****************************************************************************
30 Check for a SID in an NT_USER_TOKEN
31 ****************************************************************************/
33 bool nt_token_check_sid ( const DOM_SID
*sid
, const NT_USER_TOKEN
*token
)
40 for ( i
=0; i
<token
->num_sids
; i
++ ) {
41 if ( sid_equal( sid
, &token
->user_sids
[i
] ) )
48 bool nt_token_check_domain_rid( NT_USER_TOKEN
*token
, uint32 rid
)
52 /* if we are a domain member, the get the domain SID, else for
53 a DC or standalone server, use our own SID */
55 if ( lp_server_role() == ROLE_DOMAIN_MEMBER
) {
56 if ( !secrets_fetch_domain_sid( lp_workgroup(),
58 DEBUG(1,("nt_token_check_domain_rid: Cannot lookup "
59 "SID for domain [%s]\n", lp_workgroup()));
64 sid_copy( &domain_sid
, get_global_sam_sid() );
66 sid_append_rid( &domain_sid
, rid
);
68 return nt_token_check_sid( &domain_sid
, token
);\
71 /******************************************************************************
72 Create a token for the root user to be used internally by smbd.
73 This is similar to running under the context of the LOCAL_SYSTEM account
74 in Windows. This is a read-only token. Do not modify it or free() it.
75 Create a copy if your need to change it.
76 ******************************************************************************/
78 NT_USER_TOKEN
*get_root_nt_token( void )
80 struct nt_user_token
*token
, *for_cache
;
85 cache_data
= memcache_lookup_talloc(
86 NULL
, SINGLETON_CACHE_TALLOC
,
87 data_blob_string_const("root_nt_token"));
89 if (cache_data
!= NULL
) {
90 return talloc_get_type_abort(
91 cache_data
, struct nt_user_token
);
94 if ( !(pw
= sys_getpwnam( "root" )) ) {
95 DEBUG(0,("get_root_nt_token: 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(NULL
, &u_sid
, False
,
106 1, &global_sid_Builtin_Administrators
);
108 token
->privileges
= se_disk_operators
;
113 NULL
, SINGLETON_CACHE_TALLOC
,
114 data_blob_string_const("root_nt_token"), &for_cache
);
121 * Add alias SIDs from memberships within the partially created token SID list
124 NTSTATUS
add_aliases(const DOM_SID
*domain_sid
,
125 struct nt_user_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
++) {
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 nt_user_token
*token
)
175 /* nothing to do if we aren't in a domain */
177 if ( !(IS_DC
|| lp_server_role()==ROLE_DOMAIN_MEMBER
) ) {
181 /* Find the Domain Admins SID */
184 sid_copy( &domadm
, get_global_sam_sid() );
186 if ( !secrets_fetch_domain_sid( lp_workgroup(), &domadm
) )
187 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
189 sid_append_rid( &domadm
, DOMAIN_GROUP_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
->user_sids
, &token
->num_sids
);
197 if (!NT_STATUS_IS_OK(status
)) {
205 /*******************************************************************
206 *******************************************************************/
208 static NTSTATUS
create_builtin_users( void )
213 status
= pdb_create_builtin_alias( BUILTIN_ALIAS_RID_USERS
);
214 if ( !NT_STATUS_IS_OK(status
) ) {
215 DEBUG(5,("create_builtin_users: Failed to create Users\n"));
219 /* add domain users */
220 if ((IS_DC
|| (lp_server_role() == ROLE_DOMAIN_MEMBER
))
221 && secrets_fetch_domain_sid(lp_workgroup(), &dom_users
))
223 sid_append_rid(&dom_users
, DOMAIN_GROUP_RID_USERS
);
224 status
= pdb_add_aliasmem( &global_sid_Builtin_Users
, &dom_users
);
225 if ( !NT_STATUS_IS_OK(status
) ) {
226 DEBUG(4,("create_builtin_administrators: Failed to add Domain Users to"
235 /*******************************************************************
236 *******************************************************************/
238 static NTSTATUS
create_builtin_administrators( void )
241 DOM_SID dom_admins
, root_sid
;
243 enum lsa_SidType type
;
247 status
= pdb_create_builtin_alias( BUILTIN_ALIAS_RID_ADMINS
);
248 if ( !NT_STATUS_IS_OK(status
) ) {
249 DEBUG(5,("create_builtin_administrators: Failed to create Administrators\n"));
253 /* add domain admins */
254 if ((IS_DC
|| (lp_server_role() == ROLE_DOMAIN_MEMBER
))
255 && secrets_fetch_domain_sid(lp_workgroup(), &dom_admins
))
257 sid_append_rid(&dom_admins
, DOMAIN_GROUP_RID_ADMINS
);
258 status
= pdb_add_aliasmem( &global_sid_Builtin_Administrators
, &dom_admins
);
259 if ( !NT_STATUS_IS_OK(status
) ) {
260 DEBUG(4,("create_builtin_administrators: Failed to add Domain Admins"
261 " Administrators\n"));
267 if ( (ctx
= talloc_init("create_builtin_administrators")) == NULL
) {
268 return NT_STATUS_NO_MEMORY
;
270 fstr_sprintf( root_name
, "%s\\root", get_global_sam_name() );
271 ret
= lookup_name(ctx
, root_name
, LOOKUP_NAME_DOMAIN
, NULL
, NULL
,
276 status
= pdb_add_aliasmem( &global_sid_Builtin_Administrators
, &root_sid
);
277 if ( !NT_STATUS_IS_OK(status
) ) {
278 DEBUG(4,("create_builtin_administrators: Failed to add root"
279 " Administrators\n"));
288 /*******************************************************************
289 Create a NT token for the user, expanding local aliases
290 *******************************************************************/
292 struct nt_user_token
*create_local_nt_token(TALLOC_CTX
*mem_ctx
,
293 const DOM_SID
*user_sid
,
296 const DOM_SID
*groupsids
)
298 struct nt_user_token
*result
= NULL
;
303 DEBUG(10, ("Create local NT token for %s\n",
304 sid_string_dbg(user_sid
)));
306 if (!(result
= TALLOC_ZERO_P(mem_ctx
, struct nt_user_token
))) {
307 DEBUG(0, ("talloc failed\n"));
311 /* Add the user and primary group sid */
313 status
= add_sid_to_array(result
, user_sid
,
314 &result
->user_sids
, &result
->num_sids
);
315 if (!NT_STATUS_IS_OK(status
)) {
319 /* For guest, num_groupsids may be zero. */
321 status
= add_sid_to_array(result
, &groupsids
[0],
324 if (!NT_STATUS_IS_OK(status
)) {
329 /* Add in BUILTIN sids */
331 status
= add_sid_to_array(result
, &global_sid_World
,
332 &result
->user_sids
, &result
->num_sids
);
333 if (!NT_STATUS_IS_OK(status
)) {
336 status
= add_sid_to_array(result
, &global_sid_Network
,
337 &result
->user_sids
, &result
->num_sids
);
338 if (!NT_STATUS_IS_OK(status
)) {
343 status
= add_sid_to_array(result
, &global_sid_Builtin_Guests
,
346 if (!NT_STATUS_IS_OK(status
)) {
350 status
= add_sid_to_array(result
,
351 &global_sid_Authenticated_Users
,
354 if (!NT_STATUS_IS_OK(status
)) {
359 /* Now the SIDs we got from authentication. These are the ones from
360 * the info3 struct or from the pdb_enum_group_memberships, depending
361 * on who authenticated the user.
362 * Note that we start the for loop at "1" here, we already added the
363 * first group sid as primary above. */
365 for (i
=1; i
<num_groupsids
; i
++) {
366 status
= add_sid_to_array_unique(result
, &groupsids
[i
],
369 if (!NT_STATUS_IS_OK(status
)) {
374 /* Deal with the BUILTIN\Administrators group. If the SID can
375 be resolved then assume that the add_aliasmem( S-1-5-32 )
378 if ( !sid_to_gid( &global_sid_Builtin_Administrators
, &gid
) ) {
379 /* We can only create a mapping if winbind is running
380 and the nested group functionality has been enabled */
382 if ( lp_winbind_nested_groups() && winbind_ping() ) {
384 status
= create_builtin_administrators( );
385 if ( !NT_STATUS_IS_OK(status
) ) {
386 DEBUG(2,("WARNING: Failed to create BUILTIN\\Administrators "
387 "group! Can Winbind allocate gids?\n"));
388 /* don't fail, just log the message */
393 status
= add_builtin_administrators( result
);
394 if ( !NT_STATUS_IS_OK(status
) ) {
395 /* just log a complaint but do not fail */
396 DEBUG(3,("create_local_nt_token: failed to check for local Administrators"
397 " membership (%s)\n", nt_errstr(status
)));
402 /* Deal with the BUILTIN\Users group. If the SID can
403 be resolved then assume that the add_aliasmem( S-1-5-32 )
406 if ( !sid_to_gid( &global_sid_Builtin_Users
, &gid
) ) {
407 /* We can only create a mapping if winbind is running
408 and the nested group functionality has been enabled */
410 if ( lp_winbind_nested_groups() && winbind_ping() ) {
412 status
= create_builtin_users( );
413 if ( !NT_STATUS_IS_OK(status
) ) {
414 DEBUG(2,("WARNING: Failed to create BUILTIN\\Users group! "
415 "Can Winbind allocate gids?\n"));
416 /* don't fail, just log the message */
422 /* Deal with local groups */
424 if (lp_winbind_nested_groups()) {
428 /* Now add the aliases. First the one from our local SAM */
430 status
= add_aliases(get_global_sam_sid(), result
);
432 if (!NT_STATUS_IS_OK(status
)) {
438 /* Finally the builtin ones */
440 status
= add_aliases(&global_sid_Builtin
, result
);
442 if (!NT_STATUS_IS_OK(status
)) {
452 get_privileges_for_sids(&result
->privileges
, result
->user_sids
,
457 /****************************************************************************
458 prints a NT_USER_TOKEN to debug output.
459 ****************************************************************************/
461 void debug_nt_user_token(int dbg_class
, int dbg_lev
, NT_USER_TOKEN
*token
)
466 DEBUGC(dbg_class
, dbg_lev
, ("NT user token: (NULL)\n"));
470 DEBUGC(dbg_class
, dbg_lev
,
471 ("NT user token of user %s\n",
472 sid_string_dbg(&token
->user_sids
[0]) ));
473 DEBUGADDC(dbg_class
, dbg_lev
,
474 ("contains %lu SIDs\n", (unsigned long)token
->num_sids
));
475 for (i
= 0; i
< token
->num_sids
; i
++)
476 DEBUGADDC(dbg_class
, dbg_lev
,
477 ("SID[%3lu]: %s\n", (unsigned long)i
,
478 sid_string_dbg(&token
->user_sids
[i
])));
480 dump_se_priv( dbg_class
, dbg_lev
, &token
->privileges
);
483 /****************************************************************************
484 prints a UNIX 'token' to debug output.
485 ****************************************************************************/
487 void debug_unix_user_token(int dbg_class
, int dbg_lev
, uid_t uid
, gid_t gid
,
488 int n_groups
, gid_t
*groups
)
491 DEBUGC(dbg_class
, dbg_lev
,
492 ("UNIX token of user %ld\n", (long int)uid
));
494 DEBUGADDC(dbg_class
, dbg_lev
,
495 ("Primary group is %ld and contains %i supplementary "
496 "groups\n", (long int)gid
, n_groups
));
497 for (i
= 0; i
< n_groups
; i
++)
498 DEBUGADDC(dbg_class
, dbg_lev
, ("Group[%3i]: %ld\n", i
,
499 (long int)groups
[i
]));