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]));