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
= NULL
;
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
);
109 NULL
, SINGLETON_CACHE_TALLOC
,
110 data_blob_string_const("root_nt_token"), token
);
117 * Add alias SIDs from memberships within the partially created token SID list
120 NTSTATUS
add_aliases(const DOM_SID
*domain_sid
,
121 struct nt_user_token
*token
)
124 size_t i
, num_aliases
;
128 if (!(tmp_ctx
= talloc_init("add_aliases"))) {
129 return NT_STATUS_NO_MEMORY
;
135 status
= pdb_enum_alias_memberships(tmp_ctx
, domain_sid
,
138 &aliases
, &num_aliases
);
140 if (!NT_STATUS_IS_OK(status
)) {
141 DEBUG(10, ("pdb_enum_alias_memberships failed: %s\n",
146 for (i
=0; i
<num_aliases
; i
++) {
148 sid_compose(&alias_sid
, domain_sid
, aliases
[i
]);
149 status
= add_sid_to_array_unique(token
, &alias_sid
,
152 if (!NT_STATUS_IS_OK(status
)) {
153 DEBUG(0, ("add_sid_to_array failed\n"));
159 TALLOC_FREE(tmp_ctx
);
163 /*******************************************************************
164 *******************************************************************/
166 static NTSTATUS
add_builtin_administrators( struct nt_user_token
*token
)
171 /* nothing to do if we aren't in a domain */
173 if ( !(IS_DC
|| lp_server_role()==ROLE_DOMAIN_MEMBER
) ) {
177 /* Find the Domain Admins SID */
180 sid_copy( &domadm
, get_global_sam_sid() );
182 if ( !secrets_fetch_domain_sid( lp_workgroup(), &domadm
) )
183 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
185 sid_append_rid( &domadm
, DOMAIN_GROUP_RID_ADMINS
);
187 /* Add Administrators if the user beloongs to Domain Admins */
189 if ( nt_token_check_sid( &domadm
, token
) ) {
190 status
= add_sid_to_array(token
,
191 &global_sid_Builtin_Administrators
,
192 &token
->user_sids
, &token
->num_sids
);
193 if (!NT_STATUS_IS_OK(status
)) {
201 /*******************************************************************
202 *******************************************************************/
204 static NTSTATUS
create_builtin_users( void )
209 status
= pdb_create_builtin_alias( BUILTIN_ALIAS_RID_USERS
);
210 if ( !NT_STATUS_IS_OK(status
) ) {
211 DEBUG(0,("create_builtin_users: Failed to create Users\n"));
215 /* add domain users */
216 if ((IS_DC
|| (lp_server_role() == ROLE_DOMAIN_MEMBER
))
217 && secrets_fetch_domain_sid(lp_workgroup(), &dom_users
))
219 sid_append_rid(&dom_users
, DOMAIN_GROUP_RID_USERS
);
220 status
= pdb_add_aliasmem( &global_sid_Builtin_Users
, &dom_users
);
221 if ( !NT_STATUS_IS_OK(status
) ) {
222 DEBUG(0,("create_builtin_administrators: Failed to add Domain Users to"
231 /*******************************************************************
232 *******************************************************************/
234 static NTSTATUS
create_builtin_administrators( void )
237 DOM_SID dom_admins
, root_sid
;
239 enum lsa_SidType type
;
243 status
= pdb_create_builtin_alias( BUILTIN_ALIAS_RID_ADMINS
);
244 if ( !NT_STATUS_IS_OK(status
) ) {
245 DEBUG(0,("create_builtin_administrators: Failed to create Administrators\n"));
249 /* add domain admins */
250 if ((IS_DC
|| (lp_server_role() == ROLE_DOMAIN_MEMBER
))
251 && secrets_fetch_domain_sid(lp_workgroup(), &dom_admins
))
253 sid_append_rid(&dom_admins
, DOMAIN_GROUP_RID_ADMINS
);
254 status
= pdb_add_aliasmem( &global_sid_Builtin_Administrators
, &dom_admins
);
255 if ( !NT_STATUS_IS_OK(status
) ) {
256 DEBUG(0,("create_builtin_administrators: Failed to add Domain Admins"
257 " Administrators\n"));
263 if ( (ctx
= talloc_init("create_builtin_administrators")) == NULL
) {
264 return NT_STATUS_NO_MEMORY
;
266 fstr_sprintf( root_name
, "%s\\root", get_global_sam_name() );
267 ret
= lookup_name(ctx
, root_name
, LOOKUP_NAME_DOMAIN
, NULL
, NULL
,
272 status
= pdb_add_aliasmem( &global_sid_Builtin_Administrators
, &root_sid
);
273 if ( !NT_STATUS_IS_OK(status
) ) {
274 DEBUG(0,("create_builtin_administrators: Failed to add root"
275 " Administrators\n"));
284 /*******************************************************************
285 Create a NT token for the user, expanding local aliases
286 *******************************************************************/
288 struct nt_user_token
*create_local_nt_token(TALLOC_CTX
*mem_ctx
,
289 const DOM_SID
*user_sid
,
292 const DOM_SID
*groupsids
)
294 struct nt_user_token
*result
= NULL
;
299 DEBUG(10, ("Create local NT token for %s\n",
300 sid_string_dbg(user_sid
)));
302 if (!(result
= TALLOC_ZERO_P(mem_ctx
, struct nt_user_token
))) {
303 DEBUG(0, ("talloc failed\n"));
307 /* Add the user and primary group sid */
309 status
= add_sid_to_array(result
, user_sid
,
310 &result
->user_sids
, &result
->num_sids
);
311 if (!NT_STATUS_IS_OK(status
)) {
315 /* For guest, num_groupsids may be zero. */
317 status
= add_sid_to_array(result
, &groupsids
[0],
320 if (!NT_STATUS_IS_OK(status
)) {
325 /* Add in BUILTIN sids */
327 status
= add_sid_to_array(result
, &global_sid_World
,
328 &result
->user_sids
, &result
->num_sids
);
329 if (!NT_STATUS_IS_OK(status
)) {
332 status
= add_sid_to_array(result
, &global_sid_Network
,
333 &result
->user_sids
, &result
->num_sids
);
334 if (!NT_STATUS_IS_OK(status
)) {
339 status
= add_sid_to_array(result
, &global_sid_Builtin_Guests
,
342 if (!NT_STATUS_IS_OK(status
)) {
346 status
= add_sid_to_array(result
,
347 &global_sid_Authenticated_Users
,
350 if (!NT_STATUS_IS_OK(status
)) {
355 /* Now the SIDs we got from authentication. These are the ones from
356 * the info3 struct or from the pdb_enum_group_memberships, depending
357 * on who authenticated the user.
358 * Note that we start the for loop at "1" here, we already added the
359 * first group sid as primary above. */
361 for (i
=1; i
<num_groupsids
; i
++) {
362 status
= add_sid_to_array_unique(result
, &groupsids
[i
],
365 if (!NT_STATUS_IS_OK(status
)) {
370 /* Deal with the BUILTIN\Administrators group. If the SID can
371 be resolved then assume that the add_aliasmem( S-1-5-32 )
374 if ( !sid_to_gid( &global_sid_Builtin_Administrators
, &gid
) ) {
375 /* We can only create a mapping if winbind is running
376 and the nested group functionality has been enabled */
378 if ( lp_winbind_nested_groups() && winbind_ping() ) {
380 status
= create_builtin_administrators( );
381 if ( !NT_STATUS_IS_OK(status
) ) {
382 DEBUG(2,("create_local_nt_token: Failed to create BUILTIN\\Administrators group!\n"));
383 /* don't fail, just log the message */
388 status
= add_builtin_administrators( result
);
389 if ( !NT_STATUS_IS_OK(status
) ) {
390 /* just log a complaint but do not fail */
391 DEBUG(3,("create_local_nt_token: failed to check for local Administrators"
392 " membership (%s)\n", nt_errstr(status
)));
397 /* Deal with the BUILTIN\Users group. If the SID can
398 be resolved then assume that the add_aliasmem( S-1-5-32 )
401 if ( !sid_to_gid( &global_sid_Builtin_Users
, &gid
) ) {
402 /* We can only create a mapping if winbind is running
403 and the nested group functionality has been enabled */
405 if ( lp_winbind_nested_groups() && winbind_ping() ) {
407 status
= create_builtin_users( );
408 if ( !NT_STATUS_IS_OK(status
) ) {
409 DEBUG(2,("create_local_nt_token: Failed to create BUILTIN\\Users group!\n"));
410 /* don't fail, just log the message */
416 /* Deal with local groups */
418 if (lp_winbind_nested_groups()) {
422 /* Now add the aliases. First the one from our local SAM */
424 status
= add_aliases(get_global_sam_sid(), result
);
426 if (!NT_STATUS_IS_OK(status
)) {
432 /* Finally the builtin ones */
434 status
= add_aliases(&global_sid_Builtin
, result
);
436 if (!NT_STATUS_IS_OK(status
)) {
446 get_privileges_for_sids(&result
->privileges
, result
->user_sids
,
451 /****************************************************************************
452 prints a NT_USER_TOKEN to debug output.
453 ****************************************************************************/
455 void debug_nt_user_token(int dbg_class
, int dbg_lev
, NT_USER_TOKEN
*token
)
460 DEBUGC(dbg_class
, dbg_lev
, ("NT user token: (NULL)\n"));
464 DEBUGC(dbg_class
, dbg_lev
,
465 ("NT user token of user %s\n",
466 sid_string_dbg(&token
->user_sids
[0]) ));
467 DEBUGADDC(dbg_class
, dbg_lev
,
468 ("contains %lu SIDs\n", (unsigned long)token
->num_sids
));
469 for (i
= 0; i
< token
->num_sids
; i
++)
470 DEBUGADDC(dbg_class
, dbg_lev
,
471 ("SID[%3lu]: %s\n", (unsigned long)i
,
472 sid_string_dbg(&token
->user_sids
[i
])));
474 dump_se_priv( dbg_class
, dbg_lev
, &token
->privileges
);
477 /****************************************************************************
478 prints a UNIX 'token' to debug output.
479 ****************************************************************************/
481 void debug_unix_user_token(int dbg_class
, int dbg_lev
, uid_t uid
, gid_t gid
,
482 int n_groups
, gid_t
*groups
)
485 DEBUGC(dbg_class
, dbg_lev
,
486 ("UNIX token of user %ld\n", (long int)uid
));
488 DEBUGADDC(dbg_class
, dbg_lev
,
489 ("Primary group is %ld and contains %i supplementary "
490 "groups\n", (long int)gid
, n_groups
));
491 for (i
= 0; i
< n_groups
; i
++)
492 DEBUGADDC(dbg_class
, dbg_lev
, ("Group[%3i]: %ld\n", i
,
493 (long int)groups
[i
]));