source3/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( SE_PRIV *privileges, const SE_PRIV *check )
 313 {
 314         SE_PRIV p1, p2;
 315
 316         if ( !privileges || !check )
 317                 return False;
 318
 319         /* everyone has privileges if you aren't checking for any */
 320
 321         if ( se_priv_empty( check ) ) {
 322                 DEBUG(1,("is_privilege_assigned: no privileges in check_mask!\n"));
 323                 return True;
 324         }
 325
 326         se_priv_copy( &p1, check );
 327
 328         /* invert the SE_PRIV we want to check for and remove that from the
 329            original set.  If we are left with the SE_PRIV we are checking
 330            for then return True */
 331
 332         se_priv_invert( &p1, check );
 333         se_priv_copy( &p2, privileges );
 334         se_priv_remove( &p2, &p1 );
 335
 336         return se_priv_equal( &p2, check );
 337 }
 338
 339 /****************************************************************************
 340  check if the privilege is in the privilege list
 341 ****************************************************************************/
 342
 343 static BOOL is_any_privilege_assigned( SE_PRIV *privileges, const SE_PRIV *check )
 344 {
 345         SE_PRIV p1, p2;
 346
 347         if ( !privileges || !check )
 348                 return False;
 349
 350         /* everyone has privileges if you aren't checking for any */
 351
 352         if ( se_priv_empty( check ) ) {
 353                 DEBUG(1,("is_any_privilege_assigned: no privileges in check_mask!\n"));
 354                 return True;
 355         }
 356
 357         se_priv_copy( &p1, check );
 358
 359         /* invert the SE_PRIV we want to check for and remove that from the
 360            original set.  If we are left with the SE_PRIV we are checking
 361            for then return True */
 362
 363         se_priv_invert( &p1, check );
 364         se_priv_copy( &p2, privileges );
 365         se_priv_remove( &p2, &p1 );
 366
 367         /* see if we have any bits left */
 368
 369         return !se_priv_empty( &p2 );
 370 }
 371
 372 /****************************************************************************
 373  add a privilege to a privilege array
 374  ****************************************************************************/
 375
 376 static BOOL privilege_set_add(PRIVILEGE_SET *priv_set, LUID_ATTR set)
 377 {
 378         LUID_ATTR *new_set;
 379
 380         /* we can allocate memory to add the new privilege */
 381
 382         new_set = TALLOC_REALLOC_ARRAY(priv_set->mem_ctx, priv_set->set, LUID_ATTR, priv_set->count + 1);
 383         if ( !new_set ) {
 384                 DEBUG(0,("privilege_set_add: failed to allocate memory!\n"));
 385                 return False;
 386         }
 387
 388         new_set[priv_set->count].luid.high = set.luid.high;
 389         new_set[priv_set->count].luid.low = set.luid.low;
 390         new_set[priv_set->count].attr = set.attr;
 391
 392         priv_set->count++;
 393         priv_set->set = new_set;
 394
 395         return True;
 396 }
 397
 398 /*********************************************************************
 399  Generate the LUID_ATTR structure based on a bitmask
 400  The assumption here is that the privilege has already been validated
 401  so we are guaranteed to find it in the list.
 402 *********************************************************************/
 403
 404 LUID_ATTR get_privilege_luid( SE_PRIV *mask )
 405 {
 406         LUID_ATTR priv_luid;
 407         int i;
 408
 409         ZERO_STRUCT( priv_luid );
 410
 411         for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
 412
 413                 if ( se_priv_equal( &privs[i].se_priv, mask ) ) {
 414                         priv_luid.luid = privs[i].luid;
 415                         break;
 416                 }
 417         }
 418
 419         return priv_luid;
 420 }
 421
 422 /*********************************************************************
 423  Generate the LUID_ATTR structure based on a bitmask
 424 *********************************************************************/
 425
 426 const char* get_privilege_dispname( const char *name )
 427 {
 428         int i;
 429
 430         for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
 431
 432                 if ( strequal( privs[i].name, name ) ) {
 433                         return privs[i].description;
 434                 }
 435         }
 436
 437         return NULL;
 438 }
 439
 440 /*********************************************************************
 441  get a list of all privleges for all sids the in list
 442 *********************************************************************/
 443
 444 BOOL get_privileges_for_sids(SE_PRIV *privileges, DOM_SID *slist, int scount)
 445 {
 446         SE_PRIV mask;
 447         int i;
 448         BOOL found = False;
 449
 450         se_priv_copy( privileges, &se_priv_none );
 451
 452         for ( i=0; i<scount; i++ ) {
 453                 /* don't add unless we actually have a privilege assigned */
 454
 455                 if ( !get_privileges( &slist[i], &mask ) )
 456                         continue;
 457
 458                 DEBUG(5,("get_privileges_for_sids: sid = %s\nPrivilege set:\n",
 459                         sid_string_static(&slist[i])));
 460                 dump_se_priv( DBGC_ALL, 5, &mask );
 461
 462                 se_priv_add( privileges, &mask );
 463                 found = True;
 464         }
 465
 466         return found;
 467 }
 468
 469
 470 /*********************************************************************
 471  travseral functions for privilege_enumerate_accounts
 472 *********************************************************************/
 473
 474 static int priv_traverse_fn(TDB_CONTEXT *t, TDB_DATA key, TDB_DATA data, void *state)
 475 {
 476         PRIV_SID_LIST *priv = state;
 477         int  prefixlen = strlen(PRIVPREFIX);
 478         DOM_SID sid;
 479         fstring sid_string;
 480
 481         /* easy check first */
 482
 483         if ( data.dsize != sizeof(SE_PRIV) )
 484                 return 0;
 485
 486         /* check we have a PRIV_+SID entry */
 487
 488         if ( strncmp(key.dptr, PRIVPREFIX, prefixlen) != 0)
 489                 return 0;
 490
 491         /* check to see if we are looking for a particular privilege */
 492
 493         if ( !se_priv_equal(&priv->privilege, &se_priv_none) ) {
 494                 SE_PRIV mask;
 495
 496                 se_priv_copy( &mask, (SE_PRIV*)data.dptr );
 497
 498                 /* if the SID does not have the specified privilege
 499                    then just return */
 500
 501                 if ( !is_privilege_assigned( &mask, &priv->privilege) )
 502                         return 0;
 503         }
 504
 505         fstrcpy( sid_string, &key.dptr[strlen(PRIVPREFIX)] );
 506
 507         /* this is a last ditch safety check to preventing returning
 508            and invalid SID (i've somehow run into this on development branches) */
 509
 510         if ( strcmp( "S-0-0", sid_string ) == 0 )
 511                 return 0;
 512
 513         if ( !string_to_sid(&sid, sid_string) ) {
 514                 DEBUG(0,("travsersal_fn_enum__acct: Could not convert SID [%s]\n",
 515                         sid_string));
 516                 return 0;
 517         }
 518
 519         add_sid_to_array( NULL, &sid, &priv->sids.list, &priv->sids.count );
 520
 521         return 0;
 522 }
 523
 524 /*********************************************************************
 525  Retreive list of privileged SIDs (for _lsa_enumerate_accounts()
 526 *********************************************************************/
 527
 528 NTSTATUS privilege_enumerate_accounts(DOM_SID **sids, int *num_sids)
 529 {
 530         TDB_CONTEXT *tdb = get_account_pol_tdb();
 531         PRIV_SID_LIST priv;
 532
 533         ZERO_STRUCT(priv);
 534
 535         se_priv_copy( &priv.privilege, &se_priv_none );
 536
 537         tdb_traverse( tdb, priv_traverse_fn, &priv);
 538
 539         /* give the memory away; caller will free */
 540
 541         *sids      = priv.sids.list;
 542         *num_sids  = priv.sids.count;
 543
 544         return NT_STATUS_OK;
 545 }
 546
 547 /***************************************************************************
 548  Add privilege to sid
 549 ****************************************************************************/
 550
 551 BOOL grant_privilege(const DOM_SID *sid, const SE_PRIV *priv_mask)
 552 {
 553         SE_PRIV old_mask, new_mask;
 554
 555         ZERO_STRUCT( old_mask );
 556         ZERO_STRUCT( new_mask );
 557
 558         if ( get_privileges( sid, &old_mask ) )
 559                 se_priv_copy( &new_mask, &old_mask );
 560         else
 561                 se_priv_copy( &new_mask, &se_priv_none );
 562
 563         se_priv_add( &new_mask, priv_mask );
 564
 565         DEBUG(10,("grant_privilege: %s\n", sid_string_static(sid)));
 566
 567         DEBUGADD( 10, ("original privilege mask:\n"));
 568         dump_se_priv( DBGC_ALL, 10, &old_mask );
 569
 570         DEBUGADD( 10, ("new privilege mask:\n"));
 571         dump_se_priv( DBGC_ALL, 10, &new_mask );
 572
 573         return set_privileges( sid, &new_mask );
 574 }
 575
 576 /*********************************************************************
 577  Add a privilege based on its name
 578 *********************************************************************/
 579
 580 BOOL grant_privilege_by_name(DOM_SID *sid, const char *name)
 581 {
 582         int i;
 583
 584         for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
 585                 if ( strequal(privs[i].name, name) ) {
 586                         return grant_privilege( sid, &privs[i].se_priv );
 587                 }
 588         }
 589
 590         DEBUG(3, ("grant_privilege_by_name: No Such Privilege Found (%s)\n", name));
 591
 592         return False;
 593 }
 594
 595 /***************************************************************************
 596  Remove privilege from sid
 597 ****************************************************************************/
 598
 599 BOOL revoke_privilege(const DOM_SID *sid, const SE_PRIV *priv_mask)
 600 {
 601         SE_PRIV mask;
 602
 603         /* if the user has no privileges, then we can't revoke any */
 604
 605         if ( !get_privileges( sid, &mask ) )
 606                 return True;
 607
 608         DEBUG(10,("revoke_privilege: %s\n", sid_string_static(sid)));
 609
 610         DEBUGADD( 10, ("original privilege mask:\n"));
 611         dump_se_priv( DBGC_ALL, 10, &mask );
 612
 613         se_priv_remove( &mask, priv_mask );
 614
 615         DEBUGADD( 10, ("new privilege mask:\n"));
 616         dump_se_priv( DBGC_ALL, 10, &mask );
 617
 618         return set_privileges( sid, &mask );
 619 }
 620
 621 /*********************************************************************
 622  Revoke all privileges
 623 *********************************************************************/
 624
 625 BOOL revoke_all_privileges( DOM_SID *sid )
 626 {
 627         return revoke_privilege( sid, &se_priv_all );
 628 }
 629
 630 /*********************************************************************
 631  Add a privilege based on its name
 632 *********************************************************************/
 633
 634 BOOL revoke_privilege_by_name(DOM_SID *sid, const char *name)
 635 {
 636         int i;
 637
 638         for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
 639                 if ( strequal(privs[i].name, name) ) {
 640                         return revoke_privilege( sid, &privs[i].se_priv );
 641                 }
 642         }
 643
 644         DEBUG(3, ("revoke_privilege_by_name: No Such Privilege Found (%s)\n", name));
 645
 646         return False;
 647 }
 648
 649 /***************************************************************************
 650  Retrieve the SIDs assigned to a given privilege
 651 ****************************************************************************/
 652
 653 NTSTATUS privilege_create_account(const DOM_SID *sid )
 654 {
 655         return ( grant_privilege(sid, &se_priv_none) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL);
 656 }
 657
 658 /****************************************************************************
 659  initialise a privilege list and set the talloc context
 660  ****************************************************************************/
 661
 662 NTSTATUS privilege_set_init(PRIVILEGE_SET *priv_set)
 663 {
 664         TALLOC_CTX *mem_ctx;
 665
 666         ZERO_STRUCTP( priv_set );
 667
 668         mem_ctx = talloc_init("privilege set");
 669         if ( !mem_ctx ) {
 670                 DEBUG(0,("privilege_set_init: failed to initialize talloc ctx!\n"));
 671                 return NT_STATUS_NO_MEMORY;
 672         }
 673
 674         priv_set->mem_ctx = mem_ctx;
 675
 676         return NT_STATUS_OK;
 677 }
 678
 679 /****************************************************************************
 680   initialise a privilege list and with someone else's talloc context
 681 ****************************************************************************/
 682
 683 NTSTATUS privilege_set_init_by_ctx(TALLOC_CTX *mem_ctx, PRIVILEGE_SET *priv_set)
 684 {
 685         ZERO_STRUCTP( priv_set );
 686
 687         priv_set->mem_ctx = mem_ctx;
 688         priv_set->ext_ctx = True;
 689
 690         return NT_STATUS_OK;
 691 }
 692
 693 /****************************************************************************
 694  Free all memory used by a PRIVILEGE_SET
 695 ****************************************************************************/
 696
 697 void privilege_set_free(PRIVILEGE_SET *priv_set)
 698 {
 699         if ( !priv_set )
 700                 return;
 701
 702         if ( !( priv_set->ext_ctx ) )
 703                 talloc_destroy( priv_set->mem_ctx );
 704
 705         ZERO_STRUCTP( priv_set );
 706 }
 707
 708 /****************************************************************************
 709  duplicate alloc luid_attr
 710  ****************************************************************************/
 711
 712 NTSTATUS dup_luid_attr(TALLOC_CTX *mem_ctx, LUID_ATTR **new_la, LUID_ATTR *old_la, int count)
 713 {
 714         int i;
 715
 716         if ( !old_la )
 717                 return NT_STATUS_OK;
 718
 719         *new_la = TALLOC_ARRAY(mem_ctx, LUID_ATTR, count);
 720         if ( !*new_la ) {
 721                 DEBUG(0,("dup_luid_attr: failed to alloc new LUID_ATTR array [%d]\n", count));
 722                 return NT_STATUS_NO_MEMORY;
 723         }
 724
 725         for (i=0; i<count; i++) {
 726                 (*new_la)[i].luid.high = old_la[i].luid.high;
 727                 (*new_la)[i].luid.low = old_la[i].luid.low;
 728                 (*new_la)[i].attr = old_la[i].attr;
 729         }
 730
 731         return NT_STATUS_OK;
 732 }
 733
 734 /****************************************************************************
 735  Does the user have the specified privilege ?  We only deal with one privilege
 736  at a time here.
 737 *****************************************************************************/
 738
 739 BOOL user_has_privileges(NT_USER_TOKEN *token, const SE_PRIV *privilege)
 740 {
 741         if ( !token )
 742                 return False;
 743
 744         return is_privilege_assigned( &token->privileges, privilege );
 745 }
 746
 747 /****************************************************************************
 748  Does the user have any of the specified privileges ?  We only deal with one privilege
 749  at a time here.
 750 *****************************************************************************/
 751
 752 BOOL user_has_any_privilege(NT_USER_TOKEN *token, const SE_PRIV *privilege)
 753 {
 754         if ( !token )
 755                 return False;
 756
 757         return is_any_privilege_assigned( &token->privileges, privilege );
 758 }
 759
 760 /****************************************************************************
 761  Convert a LUID to a named string
 762 ****************************************************************************/
 763
 764 char* luid_to_privilege_name(const LUID *set)
 765 {
 766         static fstring name;
 767         int i;
 768
 769         if (set->high != 0)
 770                 return NULL;
 771
 772         for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
 773                 if ( set->low == privs[i].luid.low ) {
 774                         fstrcpy( name, privs[i].name );
 775                         return name;
 776                 }
 777         }
 778
 779         return NULL;
 780 }
 781
 782 /*******************************************************************
 783  return the number of elements in the privlege array
 784 *******************************************************************/
 785
 786 int count_all_privileges( void )
 787 {
 788         static int count;
 789
 790         if ( count )
 791                 return count;
 792
 793         /* loop over the array and count it */
 794         for ( count=0; !se_priv_equal(&privs[count].se_priv, &se_priv_end); count++ ) ;
 795
 796         return count;
 797 }
 798
 799 /*******************************************************************
 800 *******************************************************************/
 801
 802 BOOL se_priv_to_privilege_set( PRIVILEGE_SET *set, SE_PRIV *mask )
 803 {
 804         int i;
 805         uint32 num_privs = count_all_privileges();
 806         LUID_ATTR luid;
 807
 808         luid.attr = 0;
 809         luid.luid.high = 0;
 810
 811         for ( i=0; i<num_privs; i++ ) {
 812                 if ( !is_privilege_assigned(mask, &privs[i].se_priv) )
 813                         continue;
 814
 815                 luid.luid = privs[i].luid;
 816
 817                 if ( !privilege_set_add( set, luid ) )
 818                         return False;
 819         }
 820
 821         return True;
 822 }
 823
 824 /*******************************************************************
 825 *******************************************************************/
 826
 827 static BOOL luid_to_se_priv( LUID *luid, SE_PRIV *mask )
 828 {
 829         int i;
 830         uint32 num_privs = count_all_privileges();
 831
 832         for ( i=0; i<num_privs; i++ ) {
 833                 if ( luid->low == privs[i].luid.low ) {
 834                         se_priv_copy( mask, &privs[i].se_priv );
 835                         return True;
 836                 }
 837         }
 838
 839         return False;
 840 }
 841
 842 /*******************************************************************
 843 *******************************************************************/
 844
 845 BOOL privilege_set_to_se_priv( SE_PRIV *mask, PRIVILEGE_SET *privset )
 846 {
 847         int i;
 848
 849         ZERO_STRUCTP( mask );
 850
 851         for ( i=0; i<privset->count; i++ ) {
 852                 SE_PRIV r;
 853
 854                 /* sanity check for invalid privilege.  we really
 855                    only care about the low 32 bits */
 856
 857                 if ( privset->set[i].luid.high != 0 )
 858                         return False;
 859
 860                 if ( luid_to_se_priv( &privset->set[i].luid, &r ) )
 861                         se_priv_add( mask, &r );
 862         }
 863
 864         return True;
 865 }
 866
 867 /*******************************************************************
 868 *******************************************************************/
 869
 870 BOOL is_privileged_sid( DOM_SID *sid )
 871 {
 872         SE_PRIV mask;
 873
 874         return get_privileges( sid, &mask );
 875 }