source/lib/privileges.c

   1 /*
   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
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23
  24 #include "includes.h"
  25
  26 #define PRIVPREFIX              "PRIV_"
  27
  28 static const SE_PRIV se_priv_all  = SE_ALL_PRIVS;
  29 static const SE_PRIV se_priv_end  = SE_END;
  30
  31 /* Define variables for all privileges so we can use the
  32    SE_PRIV* in the various se_priv_XXX() functions */
  33
  34 const SE_PRIV se_priv_none       = SE_NONE;
  35 const SE_PRIV se_machine_account = SE_MACHINE_ACCOUNT;
  36 const SE_PRIV se_print_operator  = SE_PRINT_OPERATOR;
  37 const SE_PRIV se_add_users       = SE_ADD_USERS;
  38 const SE_PRIV se_disk_operators  = SE_DISK_OPERATOR;
  39 const SE_PRIV se_remote_shutdown = SE_REMOTE_SHUTDOWN;
  40 const SE_PRIV se_restore         = SE_RESTORE;
  41 const SE_PRIV se_take_ownership  = SE_TAKE_OWNERSHIP;
  42
  43 /********************************************************************
  44  This is a list of privileges reported by a WIndows 2000 SP4 AD DC
  45  just for reference purposes (and I know the LUID is not guaranteed
  46  across reboots):
  47
  48             SeCreateTokenPrivilege  Create a token object ( 0x0, 0x2 )
  49      SeAssignPrimaryTokenPrivilege  Replace a process level token ( 0x0, 0x3 )
  50              SeLockMemoryPrivilege  Lock pages in memory ( 0x0, 0x4 )
  51           SeIncreaseQuotaPrivilege  Increase quotas ( 0x0, 0x5 )
  52          SeMachineAccountPrivilege  Add workstations to domain ( 0x0, 0x6 )
  53                     SeTcbPrivilege  Act as part of the operating system ( 0x0, 0x7 )
  54                SeSecurityPrivilege  Manage auditing and security log ( 0x0, 0x8 )
  55           SeTakeOwnershipPrivilege  Take ownership of files or other objects ( 0x0, 0x9 )
  56              SeLoadDriverPrivilege  Load and unload device drivers ( 0x0, 0xa )
  57           SeSystemProfilePrivilege  Profile system performance ( 0x0, 0xb )
  58              SeSystemtimePrivilege  Change the system time ( 0x0, 0xc )
  59    SeProfileSingleProcessPrivilege  Profile single process ( 0x0, 0xd )
  60    SeIncreaseBasePriorityPrivilege  Increase scheduling priority ( 0x0, 0xe )
  61          SeCreatePagefilePrivilege  Create a pagefile ( 0x0, 0xf )
  62         SeCreatePermanentPrivilege  Create permanent shared objects ( 0x0, 0x10 )
  63                  SeBackupPrivilege  Back up files and directories ( 0x0, 0x11 )
  64                 SeRestorePrivilege  Restore files and directories ( 0x0, 0x12 )
  65                SeShutdownPrivilege  Shut down the system ( 0x0, 0x13 )
  66                   SeDebugPrivilege  Debug programs ( 0x0, 0x14 )
  67                   SeAuditPrivilege  Generate security audits ( 0x0, 0x15 )
  68       SeSystemEnvironmentPrivilege  Modify firmware environment values ( 0x0, 0x16 )
  69            SeChangeNotifyPrivilege  Bypass traverse checking ( 0x0, 0x17 )
  70          SeRemoteShutdownPrivilege  Force shutdown from a remote system ( 0x0, 0x18 )
  71                  SeUndockPrivilege  Remove computer from docking station ( 0x0, 0x19 )
  72               SeSyncAgentPrivilege  Synchronize directory service data ( 0x0, 0x1a )
  73        SeEnableDelegationPrivilege  Enable computer and user accounts to be trusted for delegation ( 0x0, 0x1b )
  74            SeManageVolumePrivilege  Perform volume maintenance tasks ( 0x0, 0x1c )
  75             SeImpersonatePrivilege  Impersonate a client after authentication ( 0x0, 0x1d )
  76            SeCreateGlobalPrivilege  Create global objects ( 0x0, 0x1e )
  77
  78  ********************************************************************/
  79
  80 /* we have to define the LUID here due to a horrible check by printmig.exe
  81    that requires the SeBackupPrivilege match what is in Windows.  So match
  82    those that we implement and start Samba privileges at 0x1001 */
  83
  84 PRIVS privs[] = {
  85 #if 0   /* usrmgr will display these twice if you include them.  We don't
  86            use them but we'll keep the bitmasks reserved in privileges.h anyways */
  87
  88         {SE_NETWORK_LOGON,      "SeNetworkLogonRight",          "Access this computer from network",       { 0x0, 0x0 }},
  89         {SE_INTERACTIVE_LOGON,  "SeInteractiveLogonRight",      "Log on locally",                          { 0x0, 0x0 }},
  90         {SE_BATCH_LOGON,        "SeBatchLogonRight",            "Log on as a batch job",                   { 0x0, 0x0 }},
  91         {SE_SERVICE_LOGON,      "SeServiceLogonRight",          "Log on as a service",                     { 0x0, 0x0 }},
  92 #endif
  93         {SE_MACHINE_ACCOUNT,    "SeMachineAccountPrivilege",    "Add machines to domain",                  { 0x0, 0x0006 }},
  94         {SE_TAKE_OWNERSHIP,     "SeTakeOwnershipPrivilege",     "Take ownership of files or other objects",{ 0x0, 0x0009 }},
  95         {SE_BACKUP,             "SeBackupPrivilege",            "Back up files and directories",           { 0x0, 0x0011 }},
  96         {SE_RESTORE,            "SeRestorePrivilege",           "Restore files and directories",           { 0x0, 0x0012 }},
  97         {SE_REMOTE_SHUTDOWN,    "SeRemoteShutdownPrivilege",    "Force shutdown from a remote system",     { 0x0, 0x0018 }},
  98
  99         {SE_PRINT_OPERATOR,     "SePrintOperatorPrivilege",     "Manage printers",                         { 0x0, 0x1001 }},
 100         {SE_ADD_USERS,          "SeAddUsersPrivilege",          "Add users and groups to the domain",      { 0x0, 0x1002 }},
 101         {SE_DISK_OPERATOR,      "SeDiskOperatorPrivilege",      "Manage disk shares",                      { 0x0, 0x1003 }},
 102
 103         {SE_END, "", "", { 0x0, 0x0 }}
 104 };
 105
 106 typedef struct {
 107         size_t count;
 108         DOM_SID *list;
 109 } SID_LIST;
 110
 111 typedef struct {
 112         SE_PRIV privilege;
 113         SID_LIST sids;
 114 } PRIV_SID_LIST;
 115
 116 /***************************************************************************
 117  copy an SE_PRIV structure
 118 ****************************************************************************/
 119
 120 BOOL se_priv_copy( SE_PRIV *dst, const SE_PRIV *src )
 121 {
 122         if ( !dst || !src )
 123                 return False;
 124
 125         memcpy( dst, src, sizeof(SE_PRIV) );
 126
 127         return True;
 128 }
 129
 130 /***************************************************************************
 131  combine 2 SE_PRIV structures and store the resulting set in mew_mask
 132 ****************************************************************************/
 133
 134 void se_priv_add( SE_PRIV *mask, const SE_PRIV *addpriv )
 135 {
 136         int i;
 137
 138         for ( i=0; i<SE_PRIV_MASKSIZE; i++ ) {
 139                 mask->mask[i] |= addpriv->mask[i];
 140         }
 141 }
 142
 143 /***************************************************************************
 144  remove one SE_PRIV sytucture from another and store the resulting set
 145  in mew_mask
 146 ****************************************************************************/
 147
 148 void se_priv_remove( SE_PRIV *mask, const SE_PRIV *removepriv )
 149 {
 150         int i;
 151
 152         for ( i=0; i<SE_PRIV_MASKSIZE; i++ ) {
 153                 mask->mask[i] &= ~removepriv->mask[i];
 154         }
 155 }
 156
 157 /***************************************************************************
 158  invert a given SE_PRIV and store the set in new_mask
 159 ****************************************************************************/
 160
 161 static void se_priv_invert( SE_PRIV *new_mask, const SE_PRIV *mask )
 162 {
 163         SE_PRIV allprivs;
 164
 165         se_priv_copy( &allprivs, &se_priv_all );
 166         se_priv_remove( &allprivs, mask );
 167         se_priv_copy( new_mask, &allprivs );
 168 }
 169
 170 /***************************************************************************
 171  check if 2 SE_PRIV structure are equal
 172 ****************************************************************************/
 173
 174 static BOOL se_priv_equal( const SE_PRIV *mask1, const SE_PRIV *mask2 )
 175 {
 176         return ( memcmp(mask1, mask2, sizeof(SE_PRIV)) == 0 );
 177 }
 178
 179 /***************************************************************************
 180  check if a SE_PRIV has any assigned privileges
 181 ****************************************************************************/
 182
 183 static BOOL se_priv_empty( const SE_PRIV *mask )
 184 {
 185         SE_PRIV p1;
 186         int i;
 187
 188         se_priv_copy( &p1, mask );
 189
 190         for ( i=0; i<SE_PRIV_MASKSIZE; i++ ) {
 191                 p1.mask[i] &= se_priv_all.mask[i];
 192         }
 193
 194         return se_priv_equal( &p1, &se_priv_none );
 195 }
 196
 197 /*********************************************************************
 198  Lookup the SE_PRIV value for a privilege name
 199 *********************************************************************/
 200
 201 BOOL se_priv_from_name( const char *name, SE_PRIV *mask )
 202 {
 203         int i;
 204
 205         for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
 206                 if ( strequal( privs[i].name, name ) ) {
 207                         se_priv_copy( mask, &privs[i].se_priv );
 208                         return True;
 209                 }
 210         }
 211
 212         return False;
 213 }
 214
 215 /***************************************************************************
 216  dump an SE_PRIV structure to the log files
 217 ****************************************************************************/
 218
 219 void dump_se_priv( int dbg_cl, int dbg_lvl, const SE_PRIV *mask )
 220 {
 221         int i;
 222
 223         DEBUGADDC( dbg_cl, dbg_lvl,("SE_PRIV "));
 224
 225         for ( i=0; i<SE_PRIV_MASKSIZE; i++ ) {
 226                 DEBUGADDC( dbg_cl, dbg_lvl,(" 0x%x", mask->mask[i] ));
 227         }
 228
 229         DEBUGADDC( dbg_cl, dbg_lvl, ("\n"));
 230 }
 231
 232 /***************************************************************************
 233  Retrieve the privilege mask (set) for a given SID
 234 ****************************************************************************/
 235
 236 static BOOL get_privileges( const DOM_SID *sid, SE_PRIV *mask )
 237 {
 238         TDB_CONTEXT *tdb = get_account_pol_tdb();
 239         fstring keystr;
 240         TDB_DATA key, data;
 241
 242         /* Fail if the admin has not enable privileges */
 243
 244         if ( !lp_enable_privileges() ) {
 245                 return False;
 246         }
 247
 248         if ( !tdb )
 249                 return False;
 250
 251         /* PRIV_<SID> (NULL terminated) as the key */
 252
 253         fstr_sprintf( keystr, "%s%s", PRIVPREFIX, sid_string_static(sid) );
 254         key.dptr = keystr;
 255         key.dsize = strlen(keystr) + 1;
 256
 257         data = tdb_fetch( tdb, key );
 258
 259         if ( !data.dptr ) {
 260                 DEBUG(3,("get_privileges: No privileges assigned to SID [%s]\n",
 261                         sid_string_static(sid)));
 262                 return False;
 263         }
 264
 265         SMB_ASSERT( data.dsize == sizeof( SE_PRIV ) );
 266
 267         se_priv_copy( mask, (SE_PRIV*)data.dptr );
 268         SAFE_FREE(data.dptr);
 269
 270         return True;
 271 }
 272
 273 /***************************************************************************
 274  Store the privilege mask (set) for a given SID
 275 ****************************************************************************/
 276
 277 static BOOL set_privileges( const DOM_SID *sid, SE_PRIV *mask )
 278 {
 279         TDB_CONTEXT *tdb = get_account_pol_tdb();
 280         fstring keystr;
 281         TDB_DATA key, data;
 282
 283         if ( !lp_enable_privileges() )
 284                 return False;
 285
 286         if ( !tdb )
 287                 return False;
 288
 289         if ( !sid || (sid->num_auths == 0) ) {
 290                 DEBUG(0,("set_privileges: Refusing to store empty SID!\n"));
 291                 return False;
 292         }
 293
 294         /* PRIV_<SID> (NULL terminated) as the key */
 295
 296         fstr_sprintf( keystr, "%s%s", PRIVPREFIX, sid_string_static(sid) );
 297         key.dptr = keystr;
 298         key.dsize = strlen(keystr) + 1;
 299
 300         /* no packing.  static size structure, just write it out */
 301
 302         data.dptr  = (char*)mask;
 303         data.dsize = sizeof(SE_PRIV);
 304
 305         return ( tdb_store(tdb, key, data, TDB_REPLACE) != -1 );
 306 }
 307
 308 /****************************************************************************
 309  check if the privilege is in the privilege list
 310 ****************************************************************************/
 311
 312 static BOOL is_privilege_assigned( const SE_PRIV *privileges,
 313                                    const SE_PRIV *check )
 314 {
 315         SE_PRIV p1, p2;
 316
 317         if ( !privileges || !check )
 318                 return False;
 319
 320         /* everyone has privileges if you aren't checking for any */
 321
 322         if ( se_priv_empty( check ) ) {
 323                 DEBUG(1,("is_privilege_assigned: no privileges in check_mask!\n"));
 324                 return True;
 325         }
 326
 327         se_priv_copy( &p1, check );
 328
 329         /* invert the SE_PRIV we want to check for and remove that from the
 330            original set.  If we are left with the SE_PRIV we are checking
 331            for then return True */
 332
 333         se_priv_invert( &p1, check );
 334         se_priv_copy( &p2, privileges );
 335         se_priv_remove( &p2, &p1 );
 336
 337         return se_priv_equal( &p2, check );
 338 }
 339
 340 /****************************************************************************
 341  check if the privilege is in the privilege list
 342 ****************************************************************************/
 343
 344 static BOOL is_any_privilege_assigned( SE_PRIV *privileges, const SE_PRIV *check )
 345 {
 346         SE_PRIV p1, p2;
 347
 348         if ( !privileges || !check )
 349                 return False;
 350
 351         /* everyone has privileges if you aren't checking for any */
 352
 353         if ( se_priv_empty( check ) ) {
 354                 DEBUG(1,("is_any_privilege_assigned: no privileges in check_mask!\n"));
 355                 return True;
 356         }
 357
 358         se_priv_copy( &p1, check );
 359
 360         /* invert the SE_PRIV we want to check for and remove that from the
 361            original set.  If we are left with the SE_PRIV we are checking
 362            for then return True */
 363
 364         se_priv_invert( &p1, check );
 365         se_priv_copy( &p2, privileges );
 366         se_priv_remove( &p2, &p1 );
 367
 368         /* see if we have any bits left */
 369
 370         return !se_priv_empty( &p2 );
 371 }
 372
 373 /****************************************************************************
 374  add a privilege to a privilege array
 375  ****************************************************************************/
 376
 377 static BOOL privilege_set_add(PRIVILEGE_SET *priv_set, LUID_ATTR set)
 378 {
 379         LUID_ATTR *new_set;
 380
 381         /* we can allocate memory to add the new privilege */
 382
 383         new_set = TALLOC_REALLOC_ARRAY(priv_set->mem_ctx, priv_set->set, LUID_ATTR, priv_set->count + 1);
 384         if ( !new_set ) {
 385                 DEBUG(0,("privilege_set_add: failed to allocate memory!\n"));
 386                 return False;
 387         }
 388
 389         new_set[priv_set->count].luid.high = set.luid.high;
 390         new_set[priv_set->count].luid.low = set.luid.low;
 391         new_set[priv_set->count].attr = set.attr;
 392
 393         priv_set->count++;
 394         priv_set->set = new_set;
 395
 396         return True;
 397 }
 398
 399 /*********************************************************************
 400  Generate the LUID_ATTR structure based on a bitmask
 401  The assumption here is that the privilege has already been validated
 402  so we are guaranteed to find it in the list.
 403 *********************************************************************/
 404
 405 LUID_ATTR get_privilege_luid( SE_PRIV *mask )
 406 {
 407         LUID_ATTR priv_luid;
 408         int i;
 409
 410         ZERO_STRUCT( priv_luid );
 411
 412         for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
 413
 414                 if ( se_priv_equal( &privs[i].se_priv, mask ) ) {
 415                         priv_luid.luid = privs[i].luid;
 416                         break;
 417                 }
 418         }
 419
 420         return priv_luid;
 421 }
 422
 423 /*********************************************************************
 424  Generate the LUID_ATTR structure based on a bitmask
 425 *********************************************************************/
 426
 427 const char* get_privilege_dispname( const char *name )
 428 {
 429         int i;
 430
 431         for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
 432
 433                 if ( strequal( privs[i].name, name ) ) {
 434                         return privs[i].description;
 435                 }
 436         }
 437
 438         return NULL;
 439 }
 440
 441 /*********************************************************************
 442  get a list of all privleges for all sids the in list
 443 *********************************************************************/
 444
 445 BOOL get_privileges_for_sids(SE_PRIV *privileges, DOM_SID *slist, int scount)
 446 {
 447         SE_PRIV mask;
 448         int i;
 449         BOOL found = False;
 450
 451         se_priv_copy( privileges, &se_priv_none );
 452
 453         for ( i=0; i<scount; i++ ) {
 454                 /* don't add unless we actually have a privilege assigned */
 455
 456                 if ( !get_privileges( &slist[i], &mask ) )
 457                         continue;
 458
 459                 DEBUG(5,("get_privileges_for_sids: sid = %s\nPrivilege set:\n",
 460                         sid_string_static(&slist[i])));
 461                 dump_se_priv( DBGC_ALL, 5, &mask );
 462
 463                 se_priv_add( privileges, &mask );
 464                 found = True;
 465         }
 466
 467         return found;
 468 }
 469
 470
 471 /*********************************************************************
 472  travseral functions for privilege_enumerate_accounts
 473 *********************************************************************/
 474
 475 static int priv_traverse_fn(TDB_CONTEXT *t, TDB_DATA key, TDB_DATA data, void *state)
 476 {
 477         PRIV_SID_LIST *priv = (PRIV_SID_LIST *)state;
 478         int  prefixlen = strlen(PRIVPREFIX);
 479         DOM_SID sid;
 480         fstring sid_string;
 481
 482         /* easy check first */
 483
 484         if ( data.dsize != sizeof(SE_PRIV) )
 485                 return 0;
 486
 487         /* check we have a PRIV_+SID entry */
 488
 489         if ( strncmp(key.dptr, PRIVPREFIX, prefixlen) != 0)
 490                 return 0;
 491
 492         /* check to see if we are looking for a particular privilege */
 493
 494         if ( !se_priv_equal(&priv->privilege, &se_priv_none) ) {
 495                 SE_PRIV mask;
 496
 497                 se_priv_copy( &mask, (SE_PRIV*)data.dptr );
 498
 499                 /* if the SID does not have the specified privilege
 500                    then just return */
 501
 502                 if ( !is_privilege_assigned( &mask, &priv->privilege) )
 503                         return 0;
 504         }
 505
 506         fstrcpy( sid_string, &key.dptr[strlen(PRIVPREFIX)] );
 507
 508         /* this is a last ditch safety check to preventing returning
 509            and invalid SID (i've somehow run into this on development branches) */
 510
 511         if ( strcmp( "S-0-0", sid_string ) == 0 )
 512                 return 0;
 513
 514         if ( !string_to_sid(&sid, sid_string) ) {
 515                 DEBUG(0,("travsersal_fn_enum__acct: Could not convert SID [%s]\n",
 516                         sid_string));
 517                 return 0;
 518         }
 519
 520         if (!add_sid_to_array( NULL, &sid, &priv->sids.list, &priv->sids.count )) {
 521                 return 0;
 522         }
 523
 524         return 0;
 525 }
 526
 527 /*********************************************************************
 528  Retreive list of privileged SIDs (for _lsa_enumerate_accounts()
 529 *********************************************************************/
 530
 531 NTSTATUS privilege_enumerate_accounts(DOM_SID **sids, int *num_sids)
 532 {
 533         TDB_CONTEXT *tdb = get_account_pol_tdb();
 534         PRIV_SID_LIST priv;
 535
 536         if (!tdb) {
 537                 return NT_STATUS_ACCESS_DENIED;
 538         }
 539
 540         ZERO_STRUCT(priv);
 541
 542         se_priv_copy( &priv.privilege, &se_priv_none );
 543
 544         tdb_traverse( tdb, priv_traverse_fn, &priv);
 545
 546         /* give the memory away; caller will free */
 547
 548         *sids      = priv.sids.list;
 549         *num_sids  = priv.sids.count;
 550
 551         return NT_STATUS_OK;
 552 }
 553
 554 /***************************************************************************
 555  Add privilege to sid
 556 ****************************************************************************/
 557
 558 BOOL grant_privilege(const DOM_SID *sid, const SE_PRIV *priv_mask)
 559 {
 560         SE_PRIV old_mask, new_mask;
 561
 562         ZERO_STRUCT( old_mask );
 563         ZERO_STRUCT( new_mask );
 564
 565         if ( get_privileges( sid, &old_mask ) )
 566                 se_priv_copy( &new_mask, &old_mask );
 567         else
 568                 se_priv_copy( &new_mask, &se_priv_none );
 569
 570         se_priv_add( &new_mask, priv_mask );
 571
 572         DEBUG(10,("grant_privilege: %s\n", sid_string_static(sid)));
 573
 574         DEBUGADD( 10, ("original privilege mask:\n"));
 575         dump_se_priv( DBGC_ALL, 10, &old_mask );
 576
 577         DEBUGADD( 10, ("new privilege mask:\n"));
 578         dump_se_priv( DBGC_ALL, 10, &new_mask );
 579
 580         return set_privileges( sid, &new_mask );
 581 }
 582
 583 /*********************************************************************
 584  Add a privilege based on its name
 585 *********************************************************************/
 586
 587 BOOL grant_privilege_by_name(DOM_SID *sid, const char *name)
 588 {
 589         int i;
 590
 591         for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
 592                 if ( strequal(privs[i].name, name) ) {
 593                         return grant_privilege( sid, &privs[i].se_priv );
 594                 }
 595         }
 596
 597         DEBUG(3, ("grant_privilege_by_name: No Such Privilege Found (%s)\n", name));
 598
 599         return False;
 600 }
 601
 602 /***************************************************************************
 603  Remove privilege from sid
 604 ****************************************************************************/
 605
 606 BOOL revoke_privilege(const DOM_SID *sid, const SE_PRIV *priv_mask)
 607 {
 608         SE_PRIV mask;
 609
 610         /* if the user has no privileges, then we can't revoke any */
 611
 612         if ( !get_privileges( sid, &mask ) )
 613                 return True;
 614
 615         DEBUG(10,("revoke_privilege: %s\n", sid_string_static(sid)));
 616
 617         DEBUGADD( 10, ("original privilege mask:\n"));
 618         dump_se_priv( DBGC_ALL, 10, &mask );
 619
 620         se_priv_remove( &mask, priv_mask );
 621
 622         DEBUGADD( 10, ("new privilege mask:\n"));
 623         dump_se_priv( DBGC_ALL, 10, &mask );
 624
 625         return set_privileges( sid, &mask );
 626 }
 627
 628 /*********************************************************************
 629  Revoke all privileges
 630 *********************************************************************/
 631
 632 BOOL revoke_all_privileges( DOM_SID *sid )
 633 {
 634         return revoke_privilege( sid, &se_priv_all );
 635 }
 636
 637 /*********************************************************************
 638  Add a privilege based on its name
 639 *********************************************************************/
 640
 641 BOOL revoke_privilege_by_name(DOM_SID *sid, const char *name)
 642 {
 643         int i;
 644
 645         for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
 646                 if ( strequal(privs[i].name, name) ) {
 647                         return revoke_privilege( sid, &privs[i].se_priv );
 648                 }
 649         }
 650
 651         DEBUG(3, ("revoke_privilege_by_name: No Such Privilege Found (%s)\n", name));
 652
 653         return False;
 654 }
 655
 656 /***************************************************************************
 657  Retrieve the SIDs assigned to a given privilege
 658 ****************************************************************************/
 659
 660 NTSTATUS privilege_create_account(const DOM_SID *sid )
 661 {
 662         return ( grant_privilege(sid, &se_priv_none) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL);
 663 }
 664
 665 /****************************************************************************
 666  initialise a privilege list and set the talloc context
 667  ****************************************************************************/
 668
 669 NTSTATUS privilege_set_init(PRIVILEGE_SET *priv_set)
 670 {
 671         TALLOC_CTX *mem_ctx;
 672
 673         ZERO_STRUCTP( priv_set );
 674
 675         mem_ctx = talloc_init("privilege set");
 676         if ( !mem_ctx ) {
 677                 DEBUG(0,("privilege_set_init: failed to initialize talloc ctx!\n"));
 678                 return NT_STATUS_NO_MEMORY;
 679         }
 680
 681         priv_set->mem_ctx = mem_ctx;
 682
 683         return NT_STATUS_OK;
 684 }
 685
 686 /****************************************************************************
 687   initialise a privilege list and with someone else's talloc context
 688 ****************************************************************************/
 689
 690 NTSTATUS privilege_set_init_by_ctx(TALLOC_CTX *mem_ctx, PRIVILEGE_SET *priv_set)
 691 {
 692         ZERO_STRUCTP( priv_set );
 693
 694         priv_set->mem_ctx = mem_ctx;
 695         priv_set->ext_ctx = True;
 696
 697         return NT_STATUS_OK;
 698 }
 699
 700 /****************************************************************************
 701  Free all memory used by a PRIVILEGE_SET
 702 ****************************************************************************/
 703
 704 void privilege_set_free(PRIVILEGE_SET *priv_set)
 705 {
 706         if ( !priv_set )
 707                 return;
 708
 709         if ( !( priv_set->ext_ctx ) )
 710                 talloc_destroy( priv_set->mem_ctx );
 711
 712         ZERO_STRUCTP( priv_set );
 713 }
 714
 715 /****************************************************************************
 716  duplicate alloc luid_attr
 717  ****************************************************************************/
 718
 719 NTSTATUS dup_luid_attr(TALLOC_CTX *mem_ctx, LUID_ATTR **new_la, LUID_ATTR *old_la, int count)
 720 {
 721         int i;
 722
 723         if ( !old_la )
 724                 return NT_STATUS_OK;
 725
 726         if (count) {
 727                 *new_la = TALLOC_ARRAY(mem_ctx, LUID_ATTR, count);
 728                 if ( !*new_la ) {
 729                         DEBUG(0,("dup_luid_attr: failed to alloc new LUID_ATTR array [%d]\n", count));
 730                         return NT_STATUS_NO_MEMORY;
 731                 }
 732         } else {
 733                 *new_la = NULL;
 734         }
 735
 736         for (i=0; i<count; i++) {
 737                 (*new_la)[i].luid.high = old_la[i].luid.high;
 738                 (*new_la)[i].luid.low = old_la[i].luid.low;
 739                 (*new_la)[i].attr = old_la[i].attr;
 740         }
 741
 742         return NT_STATUS_OK;
 743 }
 744
 745 /****************************************************************************
 746  Does the user have the specified privilege ?  We only deal with one privilege
 747  at a time here.
 748 *****************************************************************************/
 749
 750 BOOL user_has_privileges(const NT_USER_TOKEN *token, const SE_PRIV *privilege)
 751 {
 752         if ( !token )
 753                 return False;
 754
 755         return is_privilege_assigned( &token->privileges, privilege );
 756 }
 757
 758 /****************************************************************************
 759  Does the user have any of the specified privileges ?  We only deal with one privilege
 760  at a time here.
 761 *****************************************************************************/
 762
 763 BOOL user_has_any_privilege(NT_USER_TOKEN *token, const SE_PRIV *privilege)
 764 {
 765         if ( !token )
 766                 return False;
 767
 768         return is_any_privilege_assigned( &token->privileges, privilege );
 769 }
 770
 771 /****************************************************************************
 772  Convert a LUID to a named string
 773 ****************************************************************************/
 774
 775 char* luid_to_privilege_name(const LUID *set)
 776 {
 777         static fstring name;
 778         int i;
 779
 780         if (set->high != 0)
 781                 return NULL;
 782
 783         for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
 784                 if ( set->low == privs[i].luid.low ) {
 785                         fstrcpy( name, privs[i].name );
 786                         return name;
 787                 }
 788         }
 789
 790         return NULL;
 791 }
 792
 793 /*******************************************************************
 794  return the number of elements in the privlege array
 795 *******************************************************************/
 796
 797 int count_all_privileges( void )
 798 {
 799         static int count;
 800
 801         if ( count )
 802                 return count;
 803
 804         /* loop over the array and count it */
 805         for ( count=0; !se_priv_equal(&privs[count].se_priv, &se_priv_end); count++ ) ;
 806
 807         return count;
 808 }
 809
 810 /*******************************************************************
 811 *******************************************************************/
 812
 813 BOOL se_priv_to_privilege_set( PRIVILEGE_SET *set, SE_PRIV *mask )
 814 {
 815         int i;
 816         uint32 num_privs = count_all_privileges();
 817         LUID_ATTR luid;
 818
 819         luid.attr = 0;
 820         luid.luid.high = 0;
 821
 822         for ( i=0; i<num_privs; i++ ) {
 823                 if ( !is_privilege_assigned(mask, &privs[i].se_priv) )
 824                         continue;
 825
 826                 luid.luid = privs[i].luid;
 827
 828                 if ( !privilege_set_add( set, luid ) )
 829                         return False;
 830         }
 831
 832         return True;
 833 }
 834
 835 /*******************************************************************
 836 *******************************************************************/
 837
 838 static BOOL luid_to_se_priv( LUID *luid, SE_PRIV *mask )
 839 {
 840         int i;
 841         uint32 num_privs = count_all_privileges();
 842
 843         for ( i=0; i<num_privs; i++ ) {
 844                 if ( luid->low == privs[i].luid.low ) {
 845                         se_priv_copy( mask, &privs[i].se_priv );
 846                         return True;
 847                 }
 848         }
 849
 850         return False;
 851 }
 852
 853 /*******************************************************************
 854 *******************************************************************/
 855
 856 BOOL privilege_set_to_se_priv( SE_PRIV *mask, PRIVILEGE_SET *privset )
 857 {
 858         int i;
 859
 860         ZERO_STRUCTP( mask );
 861
 862         for ( i=0; i<privset->count; i++ ) {
 863                 SE_PRIV r;
 864
 865                 /* sanity check for invalid privilege.  we really
 866                    only care about the low 32 bits */
 867
 868                 if ( privset->set[i].luid.high != 0 )
 869                         return False;
 870
 871                 if ( luid_to_se_priv( &privset->set[i].luid, &r ) )
 872                         se_priv_add( mask, &r );
 873         }
 874
 875         return True;
 876 }
 877
 878 /*******************************************************************
 879 *******************************************************************/
 880
 881 BOOL is_privileged_sid( const DOM_SID *sid )
 882 {
 883         SE_PRIV mask;
 884
 885         return get_privileges( sid, &mask );
 886 }
 887
 888 /*******************************************************************
 889 *******************************************************************/
 890
 891 BOOL grant_all_privileges( const DOM_SID *sid )
 892 {
 893         int i;
 894         SE_PRIV mask;
 895         uint32 num_privs = count_all_privileges();
 896
 897         se_priv_copy( &mask, &se_priv_none );
 898
 899         for ( i=0; i<num_privs; i++ ) {
 900                 se_priv_add(&mask, &privs[i].se_priv);
 901         }
 902
 903         return grant_privilege( sid, &mask );
 904 }