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 static NT_USER_TOKEN *token = NULL;
87 if ( !(pw = sys_getpwnam( "root" )) ) {
88 DEBUG(0,("get_root_nt_token: getpwnam\"root\") failed!\n"));
92 /* get the user and primary group SIDs; although the
93 BUILTIN\Administrators SId is really the one that matters here */
95 uid_to_sid(&u_sid, pw->pw_uid);
96 gid_to_sid(&g_sid, pw->pw_gid);
98 token = create_local_nt_token(NULL, &u_sid, False,
99 1, &global_sid_Builtin_Administrators);
105 * Add alias SIDs from memberships within the partially created token SID list
108 NTSTATUS add_aliases(const DOM_SID *domain_sid,
109 struct nt_user_token *token)
112 size_t i, num_aliases;
116 if (!(tmp_ctx = talloc_init("add_aliases"))) {
117 return NT_STATUS_NO_MEMORY;
123 status = pdb_enum_alias_memberships(tmp_ctx, domain_sid,
126 &aliases, &num_aliases);
128 if (!NT_STATUS_IS_OK(status)) {
129 DEBUG(10, ("pdb_enum_alias_memberships failed: %s\n",
131 TALLOC_FREE(tmp_ctx);
135 for (i=0; i<num_aliases; i++) {
137 sid_compose(&alias_sid, domain_sid, aliases[i]);
138 if (!add_sid_to_array_unique(token, &alias_sid,
141 DEBUG(0, ("add_sid_to_array failed\n"));
142 TALLOC_FREE(tmp_ctx);
143 return NT_STATUS_NO_MEMORY;
147 TALLOC_FREE(tmp_ctx);
151 /*******************************************************************
152 *******************************************************************/
154 static NTSTATUS add_builtin_administrators( struct nt_user_token *token )
158 /* nothing to do if we aren't in a domain */
160 if ( !(IS_DC || lp_server_role()==ROLE_DOMAIN_MEMBER) ) {
164 /* Find the Domain Admins SID */
167 sid_copy( &domadm, get_global_sam_sid() );
169 if ( !secrets_fetch_domain_sid( lp_workgroup(), &domadm ) )
170 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
172 sid_append_rid( &domadm, DOMAIN_GROUP_RID_ADMINS );
174 /* Add Administrators if the user beloongs to Domain Admins */
176 if ( nt_token_check_sid( &domadm, token ) ) {
177 if (!add_sid_to_array(token, &global_sid_Builtin_Administrators,
178 &token->user_sids, &token->num_sids)) {
179 return NT_STATUS_NO_MEMORY;
186 /*******************************************************************
187 *******************************************************************/
189 static NTSTATUS create_builtin_users( void )
194 status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_USERS );
195 if ( !NT_STATUS_IS_OK(status) ) {
196 DEBUG(0,("create_builtin_users: Failed to create Users\n"));
200 /* add domain users */
201 if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
202 && secrets_fetch_domain_sid(lp_workgroup(), &dom_users))
204 sid_append_rid(&dom_users, DOMAIN_GROUP_RID_USERS );
205 status = pdb_add_aliasmem( &global_sid_Builtin_Users, &dom_users);
206 if ( !NT_STATUS_IS_OK(status) ) {
207 DEBUG(0,("create_builtin_administrators: Failed to add Domain Users to"
216 /*******************************************************************
217 *******************************************************************/
219 static NTSTATUS create_builtin_administrators( void )
222 DOM_SID dom_admins, root_sid;
224 enum lsa_SidType type;
228 status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_ADMINS );
229 if ( !NT_STATUS_IS_OK(status) ) {
230 DEBUG(0,("create_builtin_administrators: Failed to create Administrators\n"));
234 /* add domain admins */
235 if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
236 && secrets_fetch_domain_sid(lp_workgroup(), &dom_admins))
238 sid_append_rid(&dom_admins, DOMAIN_GROUP_RID_ADMINS);
239 status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &dom_admins );
240 if ( !NT_STATUS_IS_OK(status) ) {
241 DEBUG(0,("create_builtin_administrators: Failed to add Domain Admins"
242 " Administrators\n"));
248 if ( (ctx = talloc_init("create_builtin_administrators")) == NULL ) {
249 return NT_STATUS_NO_MEMORY;
251 fstr_sprintf( root_name, "%s\\root", get_global_sam_name() );
252 ret = lookup_name( ctx, root_name, 0, NULL, NULL, &root_sid, &type );
256 status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &root_sid );
257 if ( !NT_STATUS_IS_OK(status) ) {
258 DEBUG(0,("create_builtin_administrators: Failed to add root"
259 " Administrators\n"));
268 /*******************************************************************
269 Create a NT token for the user, expanding local aliases
270 *******************************************************************/
272 struct nt_user_token *create_local_nt_token(TALLOC_CTX *mem_ctx,
273 const DOM_SID *user_sid,
276 const DOM_SID *groupsids)
278 struct nt_user_token *result = NULL;
283 DEBUG(10, ("Create local NT token for %s\n", sid_string_static(user_sid)));
285 if (!(result = TALLOC_ZERO_P(mem_ctx, NT_USER_TOKEN))) {
286 DEBUG(0, ("talloc failed\n"));
290 /* Add the user and primary group sid */
292 if (!add_sid_to_array(result, user_sid,
293 &result->user_sids, &result->num_sids)) {
297 /* For guest, num_groupsids may be zero. */
299 if (!add_sid_to_array(result, &groupsids[0],
300 &result->user_sids, &result->num_sids)) {
305 /* Add in BUILTIN sids */
307 if (!add_sid_to_array(result, &global_sid_World,
308 &result->user_sids, &result->num_sids)) {
311 if (!add_sid_to_array(result, &global_sid_Network,
312 &result->user_sids, &result->num_sids)) {
317 if (!add_sid_to_array(result, &global_sid_Builtin_Guests,
318 &result->user_sids, &result->num_sids)) {
322 if (!add_sid_to_array(result, &global_sid_Authenticated_Users,
323 &result->user_sids, &result->num_sids)) {
328 /* Now the SIDs we got from authentication. These are the ones from
329 * the info3 struct or from the pdb_enum_group_memberships, depending
330 * on who authenticated the user.
331 * Note that we start the for loop at "1" here, we already added the
332 * first group sid as primary above. */
334 for (i=1; i<num_groupsids; i++) {
335 if (!add_sid_to_array_unique(result, &groupsids[i],
336 &result->user_sids, &result->num_sids)) {
341 /* Deal with the BUILTIN\Administrators group. If the SID can
342 be resolved then assume that the add_aliasmem( S-1-5-32 )
345 if ( !sid_to_gid( &global_sid_Builtin_Administrators, &gid ) ) {
346 /* We can only create a mapping if winbind is running
347 and the nested group functionality has been enabled */
349 if ( lp_winbind_nested_groups() && winbind_ping() ) {
351 status = create_builtin_administrators( );
352 if ( !NT_STATUS_IS_OK(status) ) {
353 DEBUG(2,("create_local_nt_token: Failed to create BUILTIN\\Administrators group!\n"));
354 /* don't fail, just log the message */
359 status = add_builtin_administrators( result );
360 if ( !NT_STATUS_IS_OK(status) ) {
361 /* just log a complaint but do not fail */
362 DEBUG(3,("create_local_nt_token: failed to check for local Administrators"
363 " membership (%s)\n", nt_errstr(status)));
368 /* Deal with the BUILTIN\Users group. If the SID can
369 be resolved then assume that the add_aliasmem( S-1-5-32 )
372 if ( !sid_to_gid( &global_sid_Builtin_Users, &gid ) ) {
373 /* We can only create a mapping if winbind is running
374 and the nested group functionality has been enabled */
376 if ( lp_winbind_nested_groups() && winbind_ping() ) {
378 status = create_builtin_users( );
379 if ( !NT_STATUS_IS_OK(status) ) {
380 DEBUG(2,("create_local_nt_token: Failed to create BUILTIN\\Users group!\n"));
381 /* don't fail, just log the message */
387 /* Deal with local groups */
389 if (lp_winbind_nested_groups()) {
393 /* Now add the aliases. First the one from our local SAM */
395 status = add_aliases(get_global_sam_sid(), result);
397 if (!NT_STATUS_IS_OK(status)) {
403 /* Finally the builtin ones */
405 status = add_aliases(&global_sid_Builtin, result);
407 if (!NT_STATUS_IS_OK(status)) {
417 get_privileges_for_sids(&result->privileges, result->user_sids,
422 /****************************************************************************
423 prints a NT_USER_TOKEN to debug output.
424 ****************************************************************************/
426 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
431 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
435 DEBUGC(dbg_class, dbg_lev,
436 ("NT user token of user %s\n",
437 sid_string_static(&token->user_sids[0]) ));
438 DEBUGADDC(dbg_class, dbg_lev,
439 ("contains %lu SIDs\n", (unsigned long)token->num_sids));
440 for (i = 0; i < token->num_sids; i++)
441 DEBUGADDC(dbg_class, dbg_lev,
442 ("SID[%3lu]: %s\n", (unsigned long)i,
443 sid_string_static(&token->user_sids[i])));
445 dump_se_priv( dbg_class, dbg_lev, &token->privileges );
448 /****************************************************************************
449 prints a UNIX 'token' to debug output.
450 ****************************************************************************/
452 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid,
453 int n_groups, gid_t *groups)
456 DEBUGC(dbg_class, dbg_lev,
457 ("UNIX token of user %ld\n", (long int)uid));
459 DEBUGADDC(dbg_class, dbg_lev,
460 ("Primary group is %ld and contains %i supplementary "
461 "groups\n", (long int)gid, n_groups));
462 for (i = 0; i < n_groups; i++)
463 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
464 (long int)groups[i]));