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 struct dom_sid *sid, SE_PRIV *mask )
42 struct db_context *db = get_account_pol_db();
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 = dbwrap_fetch_bystring( db, talloc_tos(), 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 );
70 TALLOC_FREE(data.dptr);
75 /***************************************************************************
76 Store the privilege mask (set) for a given SID
77 ****************************************************************************/
79 static bool set_privileges( const struct dom_sid *sid, SE_PRIV *mask )
81 struct db_context *db = get_account_pol_db();
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 NT_STATUS_IS_OK(dbwrap_store_bystring(db, keystr, data,
109 /*********************************************************************
110 get a list of all privileges for all sids in the list
111 *********************************************************************/
113 bool get_privileges_for_sids(SE_PRIV *privileges, struct dom_sid *slist, int scount)
119 se_priv_copy( privileges, &se_priv_none );
121 for ( i=0; i<scount; i++ ) {
122 /* don't add unless we actually have a privilege assigned */
124 if ( !get_privileges( &slist[i], &mask ) )
127 DEBUG(5,("get_privileges_for_sids: sid = %s\nPrivilege "
128 "set:\n", sid_string_dbg(&slist[i])));
129 dump_se_priv( DBGC_ALL, 5, &mask );
131 se_priv_add( privileges, &mask );
139 /*********************************************************************
140 traversal functions for privilege_enumerate_accounts
141 *********************************************************************/
143 static int priv_traverse_fn(struct db_record *rec, void *state)
145 PRIV_SID_LIST *priv = (PRIV_SID_LIST *)state;
146 int prefixlen = strlen(PRIVPREFIX);
150 /* easy check first */
152 if (rec->value.dsize != sizeof(SE_PRIV) )
155 /* check we have a PRIV_+SID entry */
157 if ( strncmp((char *)rec->key.dptr, PRIVPREFIX, prefixlen) != 0)
160 /* check to see if we are looking for a particular privilege */
162 if ( !se_priv_equal(&priv->privilege, &se_priv_none) ) {
165 se_priv_copy( &mask, (SE_PRIV*)rec->value.dptr );
167 /* if the SID does not have the specified privilege
170 if ( !is_privilege_assigned( &mask, &priv->privilege) )
174 fstrcpy( sid_string, (char *)&(rec->key.dptr[strlen(PRIVPREFIX)]) );
176 /* this is a last ditch safety check to preventing returning
177 and invalid SID (i've somehow run into this on development branches) */
179 if ( strcmp( "S-0-0", sid_string ) == 0 )
182 if ( !string_to_sid(&sid, sid_string) ) {
183 DEBUG(0,("travsersal_fn_enum__acct: Could not convert SID [%s]\n",
188 if (!NT_STATUS_IS_OK(add_sid_to_array(priv->mem_ctx, &sid,
198 /*********************************************************************
199 Retreive list of privileged SIDs (for _lsa_enumerate_accounts()
200 *********************************************************************/
202 NTSTATUS privilege_enumerate_accounts(struct dom_sid **sids, int *num_sids)
204 struct db_context *db = get_account_pol_db();
208 return NT_STATUS_ACCESS_DENIED;
213 se_priv_copy( &priv.privilege, &se_priv_none );
215 db->traverse_read(db, priv_traverse_fn, &priv);
217 /* give the memory away; caller will free */
219 *sids = priv.sids.list;
220 *num_sids = priv.sids.count;
225 /*********************************************************************
226 Retrieve list of SIDs granted a particular privilege
227 *********************************************************************/
229 NTSTATUS privilege_enum_sids(const SE_PRIV *mask, TALLOC_CTX *mem_ctx,
230 struct dom_sid **sids, int *num_sids)
232 struct db_context *db = get_account_pol_db();
236 return NT_STATUS_ACCESS_DENIED;
241 se_priv_copy(&priv.privilege, mask);
242 priv.mem_ctx = mem_ctx;
244 db->traverse_read(db, priv_traverse_fn, &priv);
246 /* give the memory away; caller will free */
248 *sids = priv.sids.list;
249 *num_sids = priv.sids.count;
254 /***************************************************************************
256 ****************************************************************************/
258 bool grant_privilege(const struct dom_sid *sid, const SE_PRIV *priv_mask)
260 SE_PRIV old_mask, new_mask;
262 ZERO_STRUCT( old_mask );
263 ZERO_STRUCT( new_mask );
265 if ( get_privileges( sid, &old_mask ) )
266 se_priv_copy( &new_mask, &old_mask );
268 se_priv_copy( &new_mask, &se_priv_none );
270 se_priv_add( &new_mask, priv_mask );
272 DEBUG(10,("grant_privilege: %s\n", sid_string_dbg(sid)));
274 DEBUGADD( 10, ("original privilege mask:\n"));
275 dump_se_priv( DBGC_ALL, 10, &old_mask );
277 DEBUGADD( 10, ("new privilege mask:\n"));
278 dump_se_priv( DBGC_ALL, 10, &new_mask );
280 return set_privileges( sid, &new_mask );
283 /*********************************************************************
284 Add a privilege based on its name
285 *********************************************************************/
287 bool grant_privilege_by_name(struct dom_sid *sid, const char *name)
291 if (! se_priv_from_name(name, &mask)) {
292 DEBUG(3, ("grant_privilege_by_name: "
293 "No Such Privilege Found (%s)\n", name));
297 return grant_privilege( sid, &mask );
300 /***************************************************************************
301 Remove privilege from sid
302 ****************************************************************************/
304 bool revoke_privilege(const struct dom_sid *sid, const SE_PRIV *priv_mask)
308 /* if the user has no privileges, then we can't revoke any */
310 if ( !get_privileges( sid, &mask ) )
313 DEBUG(10,("revoke_privilege: %s\n", sid_string_dbg(sid)));
315 DEBUGADD( 10, ("original privilege mask:\n"));
316 dump_se_priv( DBGC_ALL, 10, &mask );
318 se_priv_remove( &mask, priv_mask );
320 DEBUGADD( 10, ("new privilege mask:\n"));
321 dump_se_priv( DBGC_ALL, 10, &mask );
323 return set_privileges( sid, &mask );
326 /*********************************************************************
327 Revoke all privileges
328 *********************************************************************/
330 bool revoke_all_privileges( struct dom_sid *sid )
332 return revoke_privilege( sid, &se_priv_all );
335 /*********************************************************************
336 Add a privilege based on its name
337 *********************************************************************/
339 bool revoke_privilege_by_name(struct dom_sid *sid, const char *name)
343 if (! se_priv_from_name(name, &mask)) {
344 DEBUG(3, ("revoke_privilege_by_name: "
345 "No Such Privilege Found (%s)\n", name));
349 return revoke_privilege(sid, &mask);
353 /***************************************************************************
354 Retrieve the SIDs assigned to a given privilege
355 ****************************************************************************/
357 NTSTATUS privilege_create_account(const struct dom_sid *sid )
359 return ( grant_privilege(sid, &se_priv_none) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL);
362 /***************************************************************************
363 Delete a privileged account
364 ****************************************************************************/
366 NTSTATUS privilege_delete_account(const struct dom_sid *sid)
368 struct db_context *db = get_account_pol_db();
371 if (!lp_enable_privileges()) {
376 return NT_STATUS_INVALID_HANDLE;
379 if (!sid || (sid->num_auths == 0)) {
380 return NT_STATUS_INVALID_SID;
383 /* PRIV_<SID> (NULL terminated) as the key */
385 fstr_sprintf(keystr, "%s%s", PRIVPREFIX, sid_to_fstring(tmp, sid));
387 return dbwrap_delete_bystring(db, keystr);
390 /****************************************************************************
391 initialise a privilege list and set the talloc context
392 ****************************************************************************/
394 NTSTATUS privilege_set_init(PRIVILEGE_SET *priv_set)
398 ZERO_STRUCTP( priv_set );
400 mem_ctx = talloc_init("privilege set");
402 DEBUG(0,("privilege_set_init: failed to initialize talloc ctx!\n"));
403 return NT_STATUS_NO_MEMORY;
406 priv_set->mem_ctx = mem_ctx;
411 /****************************************************************************
412 initialise a privilege list and with someone else's talloc context
413 ****************************************************************************/
415 NTSTATUS privilege_set_init_by_ctx(TALLOC_CTX *mem_ctx, PRIVILEGE_SET *priv_set)
417 ZERO_STRUCTP( priv_set );
419 priv_set->mem_ctx = mem_ctx;
420 priv_set->ext_ctx = True;
425 /****************************************************************************
426 Free all memory used by a PRIVILEGE_SET
427 ****************************************************************************/
429 void privilege_set_free(PRIVILEGE_SET *priv_set)
434 if ( !( priv_set->ext_ctx ) )
435 talloc_destroy( priv_set->mem_ctx );
437 ZERO_STRUCTP( priv_set );
440 /****************************************************************************
441 duplicate alloc luid_attr
442 ****************************************************************************/
444 NTSTATUS dup_luid_attr(TALLOC_CTX *mem_ctx, LUID_ATTR **new_la, LUID_ATTR *old_la, int count)
452 *new_la = TALLOC_ARRAY(mem_ctx, LUID_ATTR, count);
454 DEBUG(0,("dup_luid_attr: failed to alloc new LUID_ATTR array [%d]\n", count));
455 return NT_STATUS_NO_MEMORY;
461 for (i=0; i<count; i++) {
462 (*new_la)[i].luid.high = old_la[i].luid.high;
463 (*new_la)[i].luid.low = old_la[i].luid.low;
464 (*new_la)[i].attr = old_la[i].attr;
470 /*******************************************************************
471 *******************************************************************/
473 bool is_privileged_sid( const struct dom_sid *sid )
477 return get_privileges( sid, &mask );
480 /*******************************************************************
481 *******************************************************************/
483 bool grant_all_privileges( const struct dom_sid *sid )
487 if (!se_priv_put_all_privileges(&mask)) {
491 return grant_privilege( sid, &mask );