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/>.
27 #define PRIVPREFIX "PRIV_"
41 static bool get_privileges( const struct dom_sid *sid, SE_PRIV *mask )
43 struct db_context *db = get_account_pol_db();
47 /* Fail if the admin has not enable privileges */
49 if ( !lp_enable_privileges() ) {
56 /* PRIV_<SID> (NULL terminated) as the key */
58 fstr_sprintf(keystr, "%s%s", PRIVPREFIX, sid_to_fstring(tmp, sid));
60 data = dbwrap_fetch_bystring( db, talloc_tos(), keystr );
63 DEBUG(3, ("get_privileges: No privileges assigned to SID "
64 "[%s]\n", sid_string_dbg(sid)));
68 SMB_ASSERT( data.dsize == sizeof( SE_PRIV ) );
70 se_priv_copy( mask, (SE_PRIV*)data.dptr );
71 TALLOC_FREE(data.dptr);
76 /***************************************************************************
77 Store the privilege mask (set) for a given SID
78 ****************************************************************************/
80 static bool set_privileges( const struct dom_sid *sid, SE_PRIV *mask )
82 struct db_context *db = get_account_pol_db();
86 if ( !lp_enable_privileges() )
92 if ( !sid || (sid->num_auths == 0) ) {
93 DEBUG(0,("set_privileges: Refusing to store empty SID!\n"));
97 /* PRIV_<SID> (NULL terminated) as the key */
99 fstr_sprintf(keystr, "%s%s", PRIVPREFIX, sid_to_fstring(tmp, sid));
101 /* no packing. static size structure, just write it out */
103 data.dptr = (uint8 *)mask;
104 data.dsize = sizeof(SE_PRIV);
106 return NT_STATUS_IS_OK(dbwrap_store_bystring(db, keystr, data,
110 /*********************************************************************
111 get a list of all privileges for all sids in the list
112 *********************************************************************/
114 bool get_privileges_for_sids(SE_PRIV *privileges, struct dom_sid *slist, int scount)
120 se_priv_copy( privileges, &se_priv_none );
122 for ( i=0; i<scount; i++ ) {
123 /* don't add unless we actually have a privilege assigned */
125 if ( !get_privileges( &slist[i], &mask ) )
128 DEBUG(5,("get_privileges_for_sids: sid = %s\nPrivilege "
129 "set:\n", sid_string_dbg(&slist[i])));
130 dump_se_priv( DBGC_ALL, 5, &mask );
132 se_priv_add( privileges, &mask );
140 /*********************************************************************
141 traversal functions for privilege_enumerate_accounts
142 *********************************************************************/
144 static int priv_traverse_fn(struct db_record *rec, void *state)
146 PRIV_SID_LIST *priv = (PRIV_SID_LIST *)state;
147 int prefixlen = strlen(PRIVPREFIX);
151 /* easy check first */
153 if (rec->value.dsize != sizeof(SE_PRIV) )
156 /* check we have a PRIV_+SID entry */
158 if ( strncmp((char *)rec->key.dptr, PRIVPREFIX, prefixlen) != 0)
161 /* check to see if we are looking for a particular privilege */
163 if ( !se_priv_equal(&priv->privilege, &se_priv_none) ) {
166 se_priv_copy( &mask, (SE_PRIV*)rec->value.dptr );
168 /* if the SID does not have the specified privilege
171 if ( !is_privilege_assigned( &mask, &priv->privilege) )
175 fstrcpy( sid_string, (char *)&(rec->key.dptr[strlen(PRIVPREFIX)]) );
177 /* this is a last ditch safety check to preventing returning
178 and invalid SID (i've somehow run into this on development branches) */
180 if ( strcmp( "S-0-0", sid_string ) == 0 )
183 if ( !string_to_sid(&sid, sid_string) ) {
184 DEBUG(0,("travsersal_fn_enum__acct: Could not convert SID [%s]\n",
189 if (!NT_STATUS_IS_OK(add_sid_to_array(priv->mem_ctx, &sid,
199 /*********************************************************************
200 Retreive list of privileged SIDs (for _lsa_enumerate_accounts()
201 *********************************************************************/
203 NTSTATUS privilege_enumerate_accounts(struct dom_sid **sids, int *num_sids)
205 struct db_context *db = get_account_pol_db();
209 return NT_STATUS_ACCESS_DENIED;
214 se_priv_copy( &priv.privilege, &se_priv_none );
216 db->traverse_read(db, priv_traverse_fn, &priv);
218 /* give the memory away; caller will free */
220 *sids = priv.sids.list;
221 *num_sids = priv.sids.count;
226 /*********************************************************************
227 Retrieve list of SIDs granted a particular privilege
228 *********************************************************************/
230 NTSTATUS privilege_enum_sids(const SE_PRIV *mask, TALLOC_CTX *mem_ctx,
231 struct dom_sid **sids, int *num_sids)
233 struct db_context *db = get_account_pol_db();
237 return NT_STATUS_ACCESS_DENIED;
242 se_priv_copy(&priv.privilege, mask);
243 priv.mem_ctx = mem_ctx;
245 db->traverse_read(db, priv_traverse_fn, &priv);
247 /* give the memory away; caller will free */
249 *sids = priv.sids.list;
250 *num_sids = priv.sids.count;
255 /***************************************************************************
257 ****************************************************************************/
259 bool grant_privilege(const struct dom_sid *sid, const SE_PRIV *priv_mask)
261 SE_PRIV old_mask, new_mask;
263 ZERO_STRUCT( old_mask );
264 ZERO_STRUCT( new_mask );
266 if ( get_privileges( sid, &old_mask ) )
267 se_priv_copy( &new_mask, &old_mask );
269 se_priv_copy( &new_mask, &se_priv_none );
271 se_priv_add( &new_mask, priv_mask );
273 DEBUG(10,("grant_privilege: %s\n", sid_string_dbg(sid)));
275 DEBUGADD( 10, ("original privilege mask:\n"));
276 dump_se_priv( DBGC_ALL, 10, &old_mask );
278 DEBUGADD( 10, ("new privilege mask:\n"));
279 dump_se_priv( DBGC_ALL, 10, &new_mask );
281 return set_privileges( sid, &new_mask );
284 /*********************************************************************
285 Add a privilege based on its name
286 *********************************************************************/
288 bool grant_privilege_by_name(struct dom_sid *sid, const char *name)
292 if (! se_priv_from_name(name, &mask)) {
293 DEBUG(3, ("grant_privilege_by_name: "
294 "No Such Privilege Found (%s)\n", name));
298 return grant_privilege( sid, &mask );
301 /***************************************************************************
302 Remove privilege from sid
303 ****************************************************************************/
305 bool revoke_privilege(const struct dom_sid *sid, const SE_PRIV *priv_mask)
309 /* if the user has no privileges, then we can't revoke any */
311 if ( !get_privileges( sid, &mask ) )
314 DEBUG(10,("revoke_privilege: %s\n", sid_string_dbg(sid)));
316 DEBUGADD( 10, ("original privilege mask:\n"));
317 dump_se_priv( DBGC_ALL, 10, &mask );
319 se_priv_remove( &mask, priv_mask );
321 DEBUGADD( 10, ("new privilege mask:\n"));
322 dump_se_priv( DBGC_ALL, 10, &mask );
324 return set_privileges( sid, &mask );
327 /*********************************************************************
328 Revoke all privileges
329 *********************************************************************/
331 bool revoke_all_privileges( struct dom_sid *sid )
333 return revoke_privilege( sid, &se_priv_all );
336 /*********************************************************************
337 Add a privilege based on its name
338 *********************************************************************/
340 bool revoke_privilege_by_name(struct dom_sid *sid, const char *name)
344 if (! se_priv_from_name(name, &mask)) {
345 DEBUG(3, ("revoke_privilege_by_name: "
346 "No Such Privilege Found (%s)\n", name));
350 return revoke_privilege(sid, &mask);
354 /***************************************************************************
355 Retrieve the SIDs assigned to a given privilege
356 ****************************************************************************/
358 NTSTATUS privilege_create_account(const struct dom_sid *sid )
360 return ( grant_privilege(sid, &se_priv_none) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL);
363 /***************************************************************************
364 Delete a privileged account
365 ****************************************************************************/
367 NTSTATUS privilege_delete_account(const struct dom_sid *sid)
369 struct db_context *db = get_account_pol_db();
372 if (!lp_enable_privileges()) {
377 return NT_STATUS_INVALID_HANDLE;
380 if (!sid || (sid->num_auths == 0)) {
381 return NT_STATUS_INVALID_SID;
384 /* PRIV_<SID> (NULL terminated) as the key */
386 fstr_sprintf(keystr, "%s%s", PRIVPREFIX, sid_to_fstring(tmp, sid));
388 return dbwrap_delete_bystring(db, keystr);
391 /****************************************************************************
392 initialise a privilege list and set the talloc context
393 ****************************************************************************/
395 NTSTATUS privilege_set_init(PRIVILEGE_SET *priv_set)
399 ZERO_STRUCTP( priv_set );
401 mem_ctx = talloc_init("privilege set");
403 DEBUG(0,("privilege_set_init: failed to initialize talloc ctx!\n"));
404 return NT_STATUS_NO_MEMORY;
407 priv_set->mem_ctx = mem_ctx;
412 /****************************************************************************
413 initialise a privilege list and with someone else's talloc context
414 ****************************************************************************/
416 NTSTATUS privilege_set_init_by_ctx(TALLOC_CTX *mem_ctx, PRIVILEGE_SET *priv_set)
418 ZERO_STRUCTP( priv_set );
420 priv_set->mem_ctx = mem_ctx;
421 priv_set->ext_ctx = True;
426 /****************************************************************************
427 Free all memory used by a PRIVILEGE_SET
428 ****************************************************************************/
430 void privilege_set_free(PRIVILEGE_SET *priv_set)
435 if ( !( priv_set->ext_ctx ) )
436 talloc_destroy( priv_set->mem_ctx );
438 ZERO_STRUCTP( priv_set );
441 /****************************************************************************
442 duplicate alloc luid_attr
443 ****************************************************************************/
445 NTSTATUS dup_luid_attr(TALLOC_CTX *mem_ctx, struct lsa_LUIDAttribute **new_la, struct lsa_LUIDAttribute *old_la, int count)
453 *new_la = TALLOC_ARRAY(mem_ctx, struct lsa_LUIDAttribute, count);
455 DEBUG(0,("dup_luid_attr: failed to alloc new struct lsa_LUIDAttribute array [%d]\n", count));
456 return NT_STATUS_NO_MEMORY;
462 for (i=0; i<count; i++) {
463 (*new_la)[i].luid.high = old_la[i].luid.high;
464 (*new_la)[i].luid.low = old_la[i].luid.low;
465 (*new_la)[i].attribute = old_la[i].attribute;
471 /*******************************************************************
472 *******************************************************************/
474 bool is_privileged_sid( const struct dom_sid *sid )
478 return get_privileges( sid, &mask );
481 /*******************************************************************
482 *******************************************************************/
484 bool grant_all_privileges( const struct dom_sid *sid )
488 if (!se_priv_put_all_privileges(&mask)) {
492 return grant_privilege( sid, &mask );