2 Unix SMB/CIFS implementation.
3 Privileges handling functions
4 Copyright (C) Jean François Micouleau 1998-2001
5 Copyright (C) Simo Sorce 2002-2003
6 Copyright (C) Gerald (Jerry) Carter 2005
7 Copyright (C) Michael Adam 2007
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #define PRIVPREFIX "PRIV_"
40 static bool get_privileges( const DOM_SID *sid, SE_PRIV *mask )
42 TDB_CONTEXT *tdb = get_account_pol_tdb();
46 /* Fail if the admin has not enable privileges */
48 if ( !lp_enable_privileges() ) {
55 /* PRIV_<SID> (NULL terminated) as the key */
57 fstr_sprintf(keystr, "%s%s", PRIVPREFIX, sid_to_fstring(tmp, sid));
59 data = tdb_fetch_bystring( tdb, keystr );
62 DEBUG(3, ("get_privileges: No privileges assigned to SID "
63 "[%s]\n", sid_string_dbg(sid)));
67 SMB_ASSERT( data.dsize == sizeof( SE_PRIV ) );
69 se_priv_copy( mask, (SE_PRIV*)data.dptr );
75 /***************************************************************************
76 Store the privilege mask (set) for a given SID
77 ****************************************************************************/
79 static bool set_privileges( const DOM_SID *sid, SE_PRIV *mask )
81 TDB_CONTEXT *tdb = get_account_pol_tdb();
85 if ( !lp_enable_privileges() )
91 if ( !sid || (sid->num_auths == 0) ) {
92 DEBUG(0,("set_privileges: Refusing to store empty SID!\n"));
96 /* PRIV_<SID> (NULL terminated) as the key */
98 fstr_sprintf(keystr, "%s%s", PRIVPREFIX, sid_to_fstring(tmp, sid));
100 /* no packing. static size structure, just write it out */
102 data.dptr = (uint8 *)mask;
103 data.dsize = sizeof(SE_PRIV);
105 return ( tdb_store_bystring(tdb, keystr, data, TDB_REPLACE) != -1 );
108 /*********************************************************************
109 get a list of all privileges for all sids in the list
110 *********************************************************************/
112 bool get_privileges_for_sids(SE_PRIV *privileges, DOM_SID *slist, int scount)
118 se_priv_copy( privileges, &se_priv_none );
120 for ( i=0; i<scount; i++ ) {
121 /* don't add unless we actually have a privilege assigned */
123 if ( !get_privileges( &slist[i], &mask ) )
126 DEBUG(5,("get_privileges_for_sids: sid = %s\nPrivilege "
127 "set:\n", sid_string_dbg(&slist[i])));
128 dump_se_priv( DBGC_ALL, 5, &mask );
130 se_priv_add( privileges, &mask );
138 /*********************************************************************
139 travseral functions for privilege_enumerate_accounts
140 *********************************************************************/
142 static int priv_traverse_fn(TDB_CONTEXT *t, TDB_DATA key, TDB_DATA data, void *state)
144 PRIV_SID_LIST *priv = (PRIV_SID_LIST *)state;
145 int prefixlen = strlen(PRIVPREFIX);
149 /* easy check first */
151 if ( data.dsize != sizeof(SE_PRIV) )
154 /* check we have a PRIV_+SID entry */
156 if ( strncmp((const char *)key.dptr, PRIVPREFIX, prefixlen) != 0)
159 /* check to see if we are looking for a particular privilege */
161 if ( !se_priv_equal(&priv->privilege, &se_priv_none) ) {
164 se_priv_copy( &mask, (SE_PRIV*)data.dptr );
166 /* if the SID does not have the specified privilege
169 if ( !is_privilege_assigned( &mask, &priv->privilege) )
173 fstrcpy( sid_string, (const char *)&key.dptr[strlen(PRIVPREFIX)] );
175 /* this is a last ditch safety check to preventing returning
176 and invalid SID (i've somehow run into this on development branches) */
178 if ( strcmp( "S-0-0", sid_string ) == 0 )
181 if ( !string_to_sid(&sid, sid_string) ) {
182 DEBUG(0,("travsersal_fn_enum__acct: Could not convert SID [%s]\n",
187 if (!NT_STATUS_IS_OK(add_sid_to_array(priv->mem_ctx, &sid,
197 /*********************************************************************
198 Retreive list of privileged SIDs (for _lsa_enumerate_accounts()
199 *********************************************************************/
201 NTSTATUS privilege_enumerate_accounts(DOM_SID **sids, int *num_sids)
203 TDB_CONTEXT *tdb = get_account_pol_tdb();
207 return NT_STATUS_ACCESS_DENIED;
212 se_priv_copy( &priv.privilege, &se_priv_none );
214 tdb_traverse( tdb, priv_traverse_fn, &priv);
216 /* give the memory away; caller will free */
218 *sids = priv.sids.list;
219 *num_sids = priv.sids.count;
224 /*********************************************************************
225 Retrieve list of SIDs granted a particular privilege
226 *********************************************************************/
228 NTSTATUS privilege_enum_sids(const SE_PRIV *mask, TALLOC_CTX *mem_ctx,
229 DOM_SID **sids, int *num_sids)
231 TDB_CONTEXT *tdb = get_account_pol_tdb();
235 return NT_STATUS_ACCESS_DENIED;
240 se_priv_copy(&priv.privilege, mask);
241 priv.mem_ctx = mem_ctx;
243 tdb_traverse( tdb, priv_traverse_fn, &priv);
245 /* give the memory away; caller will free */
247 *sids = priv.sids.list;
248 *num_sids = priv.sids.count;
253 /***************************************************************************
255 ****************************************************************************/
257 bool grant_privilege(const DOM_SID *sid, const SE_PRIV *priv_mask)
259 SE_PRIV old_mask, new_mask;
261 ZERO_STRUCT( old_mask );
262 ZERO_STRUCT( new_mask );
264 if ( get_privileges( sid, &old_mask ) )
265 se_priv_copy( &new_mask, &old_mask );
267 se_priv_copy( &new_mask, &se_priv_none );
269 se_priv_add( &new_mask, priv_mask );
271 DEBUG(10,("grant_privilege: %s\n", sid_string_dbg(sid)));
273 DEBUGADD( 10, ("original privilege mask:\n"));
274 dump_se_priv( DBGC_ALL, 10, &old_mask );
276 DEBUGADD( 10, ("new privilege mask:\n"));
277 dump_se_priv( DBGC_ALL, 10, &new_mask );
279 return set_privileges( sid, &new_mask );
282 /*********************************************************************
283 Add a privilege based on its name
284 *********************************************************************/
286 bool grant_privilege_by_name(DOM_SID *sid, const char *name)
290 if (! se_priv_from_name(name, &mask)) {
291 DEBUG(3, ("grant_privilege_by_name: "
292 "No Such Privilege Found (%s)\n", name));
296 return grant_privilege( sid, &mask );
299 /***************************************************************************
300 Remove privilege from sid
301 ****************************************************************************/
303 bool revoke_privilege(const DOM_SID *sid, const SE_PRIV *priv_mask)
307 /* if the user has no privileges, then we can't revoke any */
309 if ( !get_privileges( sid, &mask ) )
312 DEBUG(10,("revoke_privilege: %s\n", sid_string_dbg(sid)));
314 DEBUGADD( 10, ("original privilege mask:\n"));
315 dump_se_priv( DBGC_ALL, 10, &mask );
317 se_priv_remove( &mask, priv_mask );
319 DEBUGADD( 10, ("new privilege mask:\n"));
320 dump_se_priv( DBGC_ALL, 10, &mask );
322 return set_privileges( sid, &mask );
325 /*********************************************************************
326 Revoke all privileges
327 *********************************************************************/
329 bool revoke_all_privileges( DOM_SID *sid )
331 return revoke_privilege( sid, &se_priv_all );
334 /*********************************************************************
335 Add a privilege based on its name
336 *********************************************************************/
338 bool revoke_privilege_by_name(DOM_SID *sid, const char *name)
342 if (! se_priv_from_name(name, &mask)) {
343 DEBUG(3, ("revoke_privilege_by_name: "
344 "No Such Privilege Found (%s)\n", name));
348 return revoke_privilege(sid, &mask);
352 /***************************************************************************
353 Retrieve the SIDs assigned to a given privilege
354 ****************************************************************************/
356 NTSTATUS privilege_create_account(const DOM_SID *sid )
358 return ( grant_privilege(sid, &se_priv_none) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL);
361 /****************************************************************************
362 initialise a privilege list and set the talloc context
363 ****************************************************************************/
365 NTSTATUS privilege_set_init(PRIVILEGE_SET *priv_set)
369 ZERO_STRUCTP( priv_set );
371 mem_ctx = talloc_init("privilege set");
373 DEBUG(0,("privilege_set_init: failed to initialize talloc ctx!\n"));
374 return NT_STATUS_NO_MEMORY;
377 priv_set->mem_ctx = mem_ctx;
382 /****************************************************************************
383 initialise a privilege list and with someone else's talloc context
384 ****************************************************************************/
386 NTSTATUS privilege_set_init_by_ctx(TALLOC_CTX *mem_ctx, PRIVILEGE_SET *priv_set)
388 ZERO_STRUCTP( priv_set );
390 priv_set->mem_ctx = mem_ctx;
391 priv_set->ext_ctx = True;
396 /****************************************************************************
397 Free all memory used by a PRIVILEGE_SET
398 ****************************************************************************/
400 void privilege_set_free(PRIVILEGE_SET *priv_set)
405 if ( !( priv_set->ext_ctx ) )
406 talloc_destroy( priv_set->mem_ctx );
408 ZERO_STRUCTP( priv_set );
411 /****************************************************************************
412 duplicate alloc luid_attr
413 ****************************************************************************/
415 NTSTATUS dup_luid_attr(TALLOC_CTX *mem_ctx, LUID_ATTR **new_la, LUID_ATTR *old_la, int count)
423 *new_la = TALLOC_ARRAY(mem_ctx, LUID_ATTR, count);
425 DEBUG(0,("dup_luid_attr: failed to alloc new LUID_ATTR array [%d]\n", count));
426 return NT_STATUS_NO_MEMORY;
432 for (i=0; i<count; i++) {
433 (*new_la)[i].luid.high = old_la[i].luid.high;
434 (*new_la)[i].luid.low = old_la[i].luid.low;
435 (*new_la)[i].attr = old_la[i].attr;
441 /*******************************************************************
442 *******************************************************************/
444 bool is_privileged_sid( const DOM_SID *sid )
448 return get_privileges( sid, &mask );
451 /*******************************************************************
452 *******************************************************************/
454 bool grant_all_privileges( const DOM_SID *sid )
458 if (!se_priv_put_all_privileges(&mask)) {
462 return grant_privilege( sid, &mask );