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