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/>.
25 #include "lib/privileges.h"
26 #include "dbwrap/dbwrap.h"
27 #include "libcli/security/privileges_private.h"
28 #include "../libcli/security/security.h"
31 #define PRIVPREFIX "PRIV_"
45 interpret an old style SE_PRIV structure
47 static uint64_t map_old_SE_PRIV(unsigned char *dptr)
49 uint32_t *old_masks = (uint32_t *)dptr;
51 * the old privileges code only ever used up to 0x800, except
52 * for a special case of 'SE_ALL_PRIVS' which was 0xFFFFFFFF
54 if (old_masks[0] == 0xFFFFFFFF) {
55 /* they set all privileges */
59 /* the old code used the machine byte order, but we don't know
60 * the byte order of the machine that wrote it. However we can
61 * tell what byte order it was by taking advantage of the fact
62 * that it only ever use up to 0x800
64 if (dptr[0] || dptr[1]) {
65 /* it was little endian */
69 /* it was either zero or big-endian */
70 return RIVAL(dptr, 0);
74 static bool get_privileges( const struct dom_sid *sid, uint64_t *mask )
76 struct db_context *db = get_account_pol_db();
81 /* Fail if the admin has not enable privileges */
83 if ( !lp_enable_privileges() ) {
90 /* PRIV_<SID> (NULL terminated) as the key */
92 fstr_sprintf(keystr, "%s%s", PRIVPREFIX, sid_to_fstring(tmp, sid));
94 status = dbwrap_fetch_bystring(db, talloc_tos(), keystr, &data);
96 if (!NT_STATUS_IS_OK(status)) {
97 DEBUG(4, ("get_privileges: No privileges assigned to SID "
98 "[%s]\n", sid_string_dbg(sid)));
102 if (data.dsize == 4*4) {
103 /* it's an old style SE_PRIV structure. */
104 *mask = map_old_SE_PRIV(data.dptr);
106 if (data.dsize != sizeof( uint64_t ) ) {
107 DEBUG(3, ("get_privileges: Invalid privileges record assigned to SID "
108 "[%s]\n", sid_string_dbg(sid)));
112 *mask = BVAL(data.dptr, 0);
115 TALLOC_FREE(data.dptr);
120 /***************************************************************************
121 Store the privilege mask (set) for a given SID
122 ****************************************************************************/
124 static bool set_privileges( const struct dom_sid *sid, uint64_t mask )
126 struct db_context *db = get_account_pol_db();
131 if ( !lp_enable_privileges() )
137 if ( !sid || (sid->num_auths == 0) ) {
138 DEBUG(0,("set_privileges: Refusing to store empty SID!\n"));
142 /* PRIV_<SID> (NULL terminated) as the key */
144 fstr_sprintf(keystr, "%s%s", PRIVPREFIX, sid_to_fstring(tmp, sid));
146 /* This writes the 64 bit bitmask out in little endian format */
147 SBVAL(privbuf,0,mask);
150 data.dsize = sizeof(privbuf);
152 return NT_STATUS_IS_OK(dbwrap_store_bystring(db, keystr, data,
156 /*********************************************************************
157 get a list of all privileges for all sids in the list
158 *********************************************************************/
160 bool get_privileges_for_sids(uint64_t *privileges, struct dom_sid *slist, int scount)
168 for ( i=0; i<scount; i++ ) {
169 /* don't add unless we actually have a privilege assigned */
171 if ( !get_privileges( &slist[i], &mask ) )
174 DEBUG(5,("get_privileges_for_sids: sid = %s\nPrivilege "
175 "set: 0x%llx\n", sid_string_dbg(&slist[i]),
176 (unsigned long long)mask));
185 NTSTATUS get_privileges_for_sid_as_set(TALLOC_CTX *mem_ctx, PRIVILEGE_SET **privileges, struct dom_sid *sid)
188 if (!get_privileges(sid, &mask)) {
189 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
192 *privileges = talloc_zero(mem_ctx, PRIVILEGE_SET);
194 return NT_STATUS_NO_MEMORY;
197 if (!se_priv_to_privilege_set(*privileges, mask)) {
198 return NT_STATUS_NO_MEMORY;
203 /*********************************************************************
204 traversal functions for privilege_enumerate_accounts
205 *********************************************************************/
207 static int priv_traverse_fn(struct db_record *rec, void *state)
209 PRIV_SID_LIST *priv = (PRIV_SID_LIST *)state;
210 int prefixlen = strlen(PRIVPREFIX);
214 /* check we have a PRIV_+SID entry */
216 if ( strncmp((char *)rec->key.dptr, PRIVPREFIX, prefixlen) != 0)
219 /* check to see if we are looking for a particular privilege */
221 fstrcpy( sid_string, (char *)&(rec->key.dptr[strlen(PRIVPREFIX)]) );
223 if (priv->privilege != 0) {
226 if (rec->value.dsize == 4*4) {
227 mask = map_old_SE_PRIV(rec->value.dptr);
229 if (rec->value.dsize != sizeof( uint64_t ) ) {
230 DEBUG(3, ("get_privileges: Invalid privileges record assigned to SID "
231 "[%s]\n", sid_string));
234 mask = BVAL(rec->value.dptr, 0);
237 /* if the SID does not have the specified privilege
240 if ((mask & priv->privilege) == 0) {
245 /* this is a last ditch safety check to preventing returning
246 and invalid SID (i've somehow run into this on development branches) */
248 if ( strcmp( "S-0-0", sid_string ) == 0 )
251 if ( !string_to_sid(&sid, sid_string) ) {
252 DEBUG(0,("travsersal_fn_enum__acct: Could not convert SID [%s]\n",
257 if (!NT_STATUS_IS_OK(add_sid_to_array(priv->mem_ctx, &sid,
267 /*********************************************************************
268 Retreive list of privileged SIDs (for _lsa_enumerate_accounts()
269 *********************************************************************/
271 NTSTATUS privilege_enumerate_accounts(struct dom_sid **sids, int *num_sids)
273 struct db_context *db = get_account_pol_db();
277 return NT_STATUS_ACCESS_DENIED;
282 db->traverse_read(db, priv_traverse_fn, &priv);
284 /* give the memory away; caller will free */
286 *sids = priv.sids.list;
287 *num_sids = priv.sids.count;
292 /*********************************************************************
293 Retrieve list of SIDs granted a particular privilege
294 *********************************************************************/
296 NTSTATUS privilege_enum_sids(enum sec_privilege privilege, TALLOC_CTX *mem_ctx,
297 struct dom_sid **sids, int *num_sids)
299 struct db_context *db = get_account_pol_db();
303 return NT_STATUS_ACCESS_DENIED;
308 priv.privilege = sec_privilege_mask(privilege);
309 priv.mem_ctx = mem_ctx;
311 db->traverse_read(db, priv_traverse_fn, &priv);
313 /* give the memory away; caller will free */
315 *sids = priv.sids.list;
316 *num_sids = priv.sids.count;
321 /***************************************************************************
323 ****************************************************************************/
325 static bool grant_privilege_bitmap(const struct dom_sid *sid, const uint64_t priv_mask)
327 uint64_t old_mask, new_mask;
329 ZERO_STRUCT( old_mask );
330 ZERO_STRUCT( new_mask );
332 if ( get_privileges( sid, &old_mask ) )
337 new_mask |= priv_mask;
339 DEBUG(10,("grant_privilege: %s\n", sid_string_dbg(sid)));
341 DEBUGADD( 10, ("original privilege mask: 0x%llx\n", (unsigned long long)new_mask));
343 DEBUGADD( 10, ("new privilege mask: 0x%llx\n", (unsigned long long)new_mask));
345 return set_privileges( sid, new_mask );
348 /*********************************************************************
349 Add a privilege based on its name
350 *********************************************************************/
352 bool grant_privilege_by_name(const struct dom_sid *sid, const char *name)
356 if (! se_priv_from_name(name, &mask)) {
357 DEBUG(3, ("grant_privilege_by_name: "
358 "No Such Privilege Found (%s)\n", name));
362 return grant_privilege_bitmap( sid, mask );
365 /***************************************************************************
366 Grant a privilege set (list of LUID values) from a sid
367 ****************************************************************************/
369 bool grant_privilege_set(const struct dom_sid *sid, struct lsa_PrivilegeSet *set)
371 uint64_t privilege_mask;
372 if (!privilege_set_to_se_priv(&privilege_mask, set)) {
375 return grant_privilege_bitmap(sid, privilege_mask);
378 /***************************************************************************
379 Remove privilege from sid
380 ****************************************************************************/
382 static bool revoke_privilege_bitmap(const struct dom_sid *sid, const uint64_t priv_mask)
386 /* if the user has no privileges, then we can't revoke any */
388 if ( !get_privileges( sid, &mask ) )
391 DEBUG(10,("revoke_privilege: %s\n", sid_string_dbg(sid)));
393 DEBUGADD( 10, ("original privilege mask: 0x%llx\n", (unsigned long long)mask));
397 DEBUGADD( 10, ("new privilege mask: 0x%llx\n", (unsigned long long)mask));
399 return set_privileges( sid, mask );
402 /***************************************************************************
403 Remove a privilege set (list of LUID values) from a sid
404 ****************************************************************************/
406 bool revoke_privilege_set(const struct dom_sid *sid, struct lsa_PrivilegeSet *set)
408 uint64_t privilege_mask;
409 if (!privilege_set_to_se_priv(&privilege_mask, set)) {
412 return revoke_privilege_bitmap(sid, privilege_mask);
415 /*********************************************************************
416 Revoke all privileges
417 *********************************************************************/
419 bool revoke_all_privileges( const struct dom_sid *sid )
421 return revoke_privilege_bitmap( sid, SE_ALL_PRIVS);
424 /*********************************************************************
425 Add a privilege based on its name
426 *********************************************************************/
428 bool revoke_privilege_by_name(const struct dom_sid *sid, const char *name)
432 if (! se_priv_from_name(name, &mask)) {
433 DEBUG(3, ("revoke_privilege_by_name: "
434 "No Such Privilege Found (%s)\n", name));
438 return revoke_privilege_bitmap(sid, mask);
442 /***************************************************************************
443 Retrieve the SIDs assigned to a given privilege
444 ****************************************************************************/
446 NTSTATUS privilege_create_account(const struct dom_sid *sid )
448 return ( grant_privilege_bitmap(sid, 0) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL);
451 /***************************************************************************
452 Delete a privileged account
453 ****************************************************************************/
455 NTSTATUS privilege_delete_account(const struct dom_sid *sid)
457 struct db_context *db = get_account_pol_db();
460 if (!lp_enable_privileges()) {
465 return NT_STATUS_INVALID_HANDLE;
468 if (!sid || (sid->num_auths == 0)) {
469 return NT_STATUS_INVALID_SID;
472 /* PRIV_<SID> (NULL terminated) as the key */
474 fstr_sprintf(keystr, "%s%s", PRIVPREFIX, sid_to_fstring(tmp, sid));
476 return dbwrap_delete_bystring(db, keystr);
479 /*******************************************************************
480 *******************************************************************/
482 bool is_privileged_sid( const struct dom_sid *sid )
486 return get_privileges( sid, &mask );
489 /*******************************************************************
490 *******************************************************************/
492 bool grant_all_privileges( const struct dom_sid *sid )
496 se_priv_put_all_privileges(&mask);
498 return grant_privilege_bitmap( sid, mask );