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 2 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, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 /* functions moved from auth/auth_util.c to minimize linker deps */
30 /****************************************************************************
31 Check for a SID in an NT_USER_TOKEN
32 ****************************************************************************/
34 BOOL
nt_token_check_sid ( const DOM_SID
*sid
, const NT_USER_TOKEN
*token
)
41 for ( i
=0; i
<token
->num_sids
; i
++ ) {
42 if ( sid_equal( sid
, &token
->user_sids
[i
] ) )
49 BOOL
nt_token_check_domain_rid( NT_USER_TOKEN
*token
, uint32 rid
)
53 /* if we are a domain member, the get the domain SID, else for
54 a DC or standalone server, use our own SID */
56 if ( lp_server_role() == ROLE_DOMAIN_MEMBER
) {
57 if ( !secrets_fetch_domain_sid( lp_workgroup(),
59 DEBUG(1,("nt_token_check_domain_rid: Cannot lookup "
60 "SID for domain [%s]\n", lp_workgroup()));
65 sid_copy( &domain_sid
, get_global_sam_sid() );
67 sid_append_rid( &domain_sid
, rid
);
69 return nt_token_check_sid( &domain_sid
, token
);\
72 /******************************************************************************
73 Create a token for the root user to be used internally by smbd.
74 This is similar to running under the context of the LOCAL_SYSTEM account
75 in Windows. This is a read-only token. Do not modify it or free() it.
76 Create a copy if your need to change it.
77 ******************************************************************************/
79 NT_USER_TOKEN
*get_root_nt_token( void )
81 static NT_USER_TOKEN
*token
= NULL
;
88 if ( !(pw
= sys_getpwnam( "root" )) ) {
89 DEBUG(0,("get_root_nt_token: getpwnam\"root\") failed!\n"));
93 /* get the user and primary group SIDs; although the
94 BUILTIN\Administrators SId is really the one that matters here */
96 uid_to_sid(&u_sid
, pw
->pw_uid
);
97 gid_to_sid(&g_sid
, pw
->pw_gid
);
99 token
= create_local_nt_token(NULL
, &u_sid
, False
,
100 1, &global_sid_Builtin_Administrators
);
106 * Add alias SIDs from memberships within the partially created token SID list
109 NTSTATUS
add_aliases(const DOM_SID
*domain_sid
,
110 struct nt_user_token
*token
)
113 size_t i
, num_aliases
;
117 if (!(tmp_ctx
= talloc_init("add_aliases"))) {
118 return NT_STATUS_NO_MEMORY
;
124 status
= pdb_enum_alias_memberships(tmp_ctx
, domain_sid
,
127 &aliases
, &num_aliases
);
129 if (!NT_STATUS_IS_OK(status
)) {
130 DEBUG(10, ("pdb_enum_alias_memberships failed: %s\n",
132 TALLOC_FREE(tmp_ctx
);
136 for (i
=0; i
<num_aliases
; i
++) {
138 sid_compose(&alias_sid
, domain_sid
, aliases
[i
]);
139 if (!add_sid_to_array_unique(token
, &alias_sid
,
142 DEBUG(0, ("add_sid_to_array failed\n"));
143 TALLOC_FREE(tmp_ctx
);
144 return NT_STATUS_NO_MEMORY
;
148 TALLOC_FREE(tmp_ctx
);
152 /*******************************************************************
153 *******************************************************************/
155 static NTSTATUS
add_builtin_administrators( struct nt_user_token
*token
)
159 /* nothing to do if we aren't in a domain */
161 if ( !(IS_DC
|| lp_server_role()==ROLE_DOMAIN_MEMBER
) ) {
165 /* Find the Domain Admins SID */
168 sid_copy( &domadm
, get_global_sam_sid() );
170 if ( !secrets_fetch_domain_sid( lp_workgroup(), &domadm
) )
171 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
173 sid_append_rid( &domadm
, DOMAIN_GROUP_RID_ADMINS
);
175 /* Add Administrators if the user beloongs to Domain Admins */
177 if ( nt_token_check_sid( &domadm
, token
) ) {
178 if (!add_sid_to_array(token
, &global_sid_Builtin_Administrators
,
179 &token
->user_sids
, &token
->num_sids
)) {
180 return NT_STATUS_NO_MEMORY
;
187 /*******************************************************************
188 *******************************************************************/
190 static NTSTATUS
create_builtin_users( void )
195 status
= pdb_create_builtin_alias( BUILTIN_ALIAS_RID_USERS
);
196 if ( !NT_STATUS_IS_OK(status
) ) {
197 DEBUG(0,("create_builtin_users: Failed to create Users\n"));
201 /* add domain users */
202 if ((IS_DC
|| (lp_server_role() == ROLE_DOMAIN_MEMBER
))
203 && secrets_fetch_domain_sid(lp_workgroup(), &dom_users
))
205 sid_append_rid(&dom_users
, DOMAIN_GROUP_RID_USERS
);
206 status
= pdb_add_aliasmem( &global_sid_Builtin_Users
, &dom_users
);
207 if ( !NT_STATUS_IS_OK(status
) ) {
208 DEBUG(0,("create_builtin_administrators: Failed to add Domain Users to"
217 /*******************************************************************
218 *******************************************************************/
220 static NTSTATUS
create_builtin_administrators( void )
223 DOM_SID dom_admins
, root_sid
;
225 enum lsa_SidType type
;
229 status
= pdb_create_builtin_alias( BUILTIN_ALIAS_RID_ADMINS
);
230 if ( !NT_STATUS_IS_OK(status
) ) {
231 DEBUG(0,("create_builtin_administrators: Failed to create Administrators\n"));
235 /* add domain admins */
236 if ((IS_DC
|| (lp_server_role() == ROLE_DOMAIN_MEMBER
))
237 && secrets_fetch_domain_sid(lp_workgroup(), &dom_admins
))
239 sid_append_rid(&dom_admins
, DOMAIN_GROUP_RID_ADMINS
);
240 status
= pdb_add_aliasmem( &global_sid_Builtin_Administrators
, &dom_admins
);
241 if ( !NT_STATUS_IS_OK(status
) ) {
242 DEBUG(0,("create_builtin_administrators: Failed to add Domain Admins"
243 " Administrators\n"));
249 if ( (ctx
= talloc_init("create_builtin_administrators")) == NULL
) {
250 return NT_STATUS_NO_MEMORY
;
252 fstr_sprintf( root_name
, "%s\\root", get_global_sam_name() );
253 ret
= lookup_name( ctx
, root_name
, 0, NULL
, NULL
, &root_sid
, &type
);
257 status
= pdb_add_aliasmem( &global_sid_Builtin_Administrators
, &root_sid
);
258 if ( !NT_STATUS_IS_OK(status
) ) {
259 DEBUG(0,("create_builtin_administrators: Failed to add root"
260 " Administrators\n"));
269 /*******************************************************************
270 Create a NT token for the user, expanding local aliases
271 *******************************************************************/
273 struct nt_user_token
*create_local_nt_token(TALLOC_CTX
*mem_ctx
,
274 const DOM_SID
*user_sid
,
277 const DOM_SID
*groupsids
)
279 struct nt_user_token
*result
= NULL
;
284 DEBUG(10, ("Create local NT token for %s\n", sid_string_static(user_sid
)));
286 if (!(result
= TALLOC_ZERO_P(mem_ctx
, NT_USER_TOKEN
))) {
287 DEBUG(0, ("talloc failed\n"));
291 /* Add the user and primary group sid */
293 if (!add_sid_to_array(result
, user_sid
,
294 &result
->user_sids
, &result
->num_sids
)) {
298 /* For guest, num_groupsids may be zero. */
300 if (!add_sid_to_array(result
, &groupsids
[0],
301 &result
->user_sids
, &result
->num_sids
)) {
306 /* Add in BUILTIN sids */
308 if (!add_sid_to_array(result
, &global_sid_World
,
309 &result
->user_sids
, &result
->num_sids
)) {
312 if (!add_sid_to_array(result
, &global_sid_Network
,
313 &result
->user_sids
, &result
->num_sids
)) {
318 if (!add_sid_to_array(result
, &global_sid_Builtin_Guests
,
319 &result
->user_sids
, &result
->num_sids
)) {
323 if (!add_sid_to_array(result
, &global_sid_Authenticated_Users
,
324 &result
->user_sids
, &result
->num_sids
)) {
329 /* Now the SIDs we got from authentication. These are the ones from
330 * the info3 struct or from the pdb_enum_group_memberships, depending
331 * on who authenticated the user.
332 * Note that we start the for loop at "1" here, we already added the
333 * first group sid as primary above. */
335 for (i
=1; i
<num_groupsids
; i
++) {
336 if (!add_sid_to_array_unique(result
, &groupsids
[i
],
337 &result
->user_sids
, &result
->num_sids
)) {
342 /* Deal with the BUILTIN\Administrators group. If the SID can
343 be resolved then assume that the add_aliasmem( S-1-5-32 )
346 if ( !sid_to_gid( &global_sid_Builtin_Administrators
, &gid
) ) {
347 /* We can only create a mapping if winbind is running
348 and the nested group functionality has been enabled */
350 if ( lp_winbind_nested_groups() && winbind_ping() ) {
352 status
= create_builtin_administrators( );
353 if ( !NT_STATUS_IS_OK(status
) ) {
354 DEBUG(2,("create_local_nt_token: Failed to create BUILTIN\\Administrators group!\n"));
355 /* don't fail, just log the message */
360 status
= add_builtin_administrators( result
);
361 if ( !NT_STATUS_IS_OK(status
) ) {
362 /* just log a complaint but do not fail */
363 DEBUG(3,("create_local_nt_token: failed to check for local Administrators"
364 " membership (%s)\n", nt_errstr(status
)));
369 /* Deal with the BUILTIN\Users group. If the SID can
370 be resolved then assume that the add_aliasmem( S-1-5-32 )
373 if ( !sid_to_gid( &global_sid_Builtin_Users
, &gid
) ) {
374 /* We can only create a mapping if winbind is running
375 and the nested group functionality has been enabled */
377 if ( lp_winbind_nested_groups() && winbind_ping() ) {
379 status
= create_builtin_users( );
380 if ( !NT_STATUS_IS_OK(status
) ) {
381 DEBUG(2,("create_local_nt_token: Failed to create BUILTIN\\Users group!\n"));
382 /* don't fail, just log the message */
388 /* Deal with local groups */
390 if (lp_winbind_nested_groups()) {
392 /* Now add the aliases. First the one from our local SAM */
394 status
= add_aliases(get_global_sam_sid(), result
);
396 if (!NT_STATUS_IS_OK(status
)) {
401 /* Finally the builtin ones */
403 status
= add_aliases(&global_sid_Builtin
, result
);
405 if (!NT_STATUS_IS_OK(status
)) {
412 get_privileges_for_sids(&result
->privileges
, result
->user_sids
,
417 /****************************************************************************
418 prints a NT_USER_TOKEN to debug output.
419 ****************************************************************************/
421 void debug_nt_user_token(int dbg_class
, int dbg_lev
, NT_USER_TOKEN
*token
)
426 DEBUGC(dbg_class
, dbg_lev
, ("NT user token: (NULL)\n"));
430 DEBUGC(dbg_class
, dbg_lev
,
431 ("NT user token of user %s\n",
432 sid_string_static(&token
->user_sids
[0]) ));
433 DEBUGADDC(dbg_class
, dbg_lev
,
434 ("contains %lu SIDs\n", (unsigned long)token
->num_sids
));
435 for (i
= 0; i
< token
->num_sids
; i
++)
436 DEBUGADDC(dbg_class
, dbg_lev
,
437 ("SID[%3lu]: %s\n", (unsigned long)i
,
438 sid_string_static(&token
->user_sids
[i
])));
440 dump_se_priv( dbg_class
, dbg_lev
, &token
->privileges
);
443 /****************************************************************************
444 prints a UNIX 'token' to debug output.
445 ****************************************************************************/
447 void debug_unix_user_token(int dbg_class
, int dbg_lev
, uid_t uid
, gid_t gid
,
448 int n_groups
, gid_t
*groups
)
451 DEBUGC(dbg_class
, dbg_lev
,
452 ("UNIX token of user %ld\n", (long int)uid
));
454 DEBUGADDC(dbg_class
, dbg_lev
,
455 ("Primary group is %ld and contains %i supplementary "
456 "groups\n", (long int)gid
, n_groups
));
457 for (i
= 0; i
< n_groups
; i
++)
458 DEBUGADDC(dbg_class
, dbg_lev
, ("Group[%3i]: %ld\n", i
,
459 (long int)groups
[i
]));