libcli/security/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    Copyright (C) Michael Adam                   2007
   8    Copyright (C) Andrew Bartlett                2010
   9    Copyright (C) Andrew Tridgell                2004
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 /*
  26  * Basic privileges functions (mask-operations and conversion
  27  * functions between the different formats (se_priv, privset, luid)
  28  * moved here * from lib/privileges.c to minimize linker deps.
  29  *
  30  * generally SID- and LUID-related code is left in lib/privileges.c
  31  *
  32  * some extra functions to hide privs array from lib/privileges.c
  33  */
  34
  35 #include "includes.h"
  36 #include "libcli/security/privileges.h"
  37 #include "libcli/security/privileges_private.h"
  38 #include "librpc/gen_ndr/security.h"
  39
  40 /* The use of strcasecmp here is safe, all the comparison strings are ASCII */
  41 #undef strcasecmp
  42
  43 #define NUM_SHORT_LIST_PRIVS 8
  44
  45 static const struct {
  46         enum sec_privilege luid;
  47         uint64_t privilege_mask;
  48         const char *name;
  49         const char *description;
  50 } privs[] = {
  51
  52         {SEC_PRIV_MACHINE_ACCOUNT, SEC_PRIV_MACHINE_ACCOUNT_BIT,   "SeMachineAccountPrivilege", "Add machines to domain"},
  53         {SEC_PRIV_TAKE_OWNERSHIP,  SEC_PRIV_TAKE_OWNERSHIP_BIT,    "SeTakeOwnershipPrivilege",    "Take ownership of files or other objects"},
  54         {SEC_PRIV_BACKUP,          SEC_PRIV_BACKUP_BIT,            "SeBackupPrivilege",           "Back up files and directories"},
  55         {SEC_PRIV_RESTORE,         SEC_PRIV_RESTORE_BIT,           "SeRestorePrivilege",          "Restore files and directories"},
  56         {SEC_PRIV_REMOTE_SHUTDOWN, SEC_PRIV_REMOTE_SHUTDOWN_BIT,   "SeRemoteShutdownPrivilege", "Force shutdown from a remote system"},
  57
  58         {SEC_PRIV_PRINT_OPERATOR,  SEC_PRIV_PRINT_OPERATOR_BIT,  "SePrintOperatorPrivilege",    "Manage printers"},
  59         {SEC_PRIV_ADD_USERS,       SEC_PRIV_ADD_USERS_BIT,       "SeAddUsersPrivilege",         "Add users and groups to the domain"},
  60         {SEC_PRIV_DISK_OPERATOR,   SEC_PRIV_DISK_OPERATOR_BIT,   "SeDiskOperatorPrivilege",     "Manage disk shares"},
  61
  62         /* The list from here on was not displayed in the code from
  63          * source3/ with the comment that usrmgr will display these
  64          * next 2 twice if you include them.  The source4/ code has
  65          * always included them, but they do not appear in Windows
  66          * 2008 R2.
  67
  68            Finally, the parameter 'short_list' determines if the short
  69            or full list (including many other privileges) is used */
  70
  71         {SEC_PRIV_SECURITY,
  72          SEC_PRIV_SECURITY_BIT,
  73          "SeSecurityPrivilege",
  74         "System security"},
  75
  76         {SEC_PRIV_SYSTEMTIME,
  77          SEC_PRIV_SYSTEMTIME_BIT,
  78          "SeSystemtimePrivilege",
  79         "Set the system clock"},
  80
  81         {SEC_PRIV_SHUTDOWN,
  82          SEC_PRIV_SHUTDOWN_BIT,
  83          "SeShutdownPrivilege",
  84         "Shutdown the system"},
  85
  86         {SEC_PRIV_DEBUG,
  87          SEC_PRIV_DEBUG_BIT,
  88          "SeDebugPrivilege",
  89         "Debug processes"},
  90
  91         {SEC_PRIV_SYSTEM_ENVIRONMENT,
  92          SEC_PRIV_SYSTEM_ENVIRONMENT_BIT,
  93          "SeSystemEnvironmentPrivilege",
  94         "Modify system environment"},
  95
  96         {SEC_PRIV_SYSTEM_PROFILE,
  97          SEC_PRIV_SYSTEM_PROFILE_BIT,
  98          "SeSystemProfilePrivilege",
  99         "Profile the system"},
 100
 101         {SEC_PRIV_PROFILE_SINGLE_PROCESS,
 102          SEC_PRIV_PROFILE_SINGLE_PROCESS_BIT,
 103          "SeProfileSingleProcessPrivilege",
 104         "Profile one process"},
 105
 106         {SEC_PRIV_INCREASE_BASE_PRIORITY,
 107          SEC_PRIV_INCREASE_BASE_PRIORITY_BIT,
 108          "SeIncreaseBasePriorityPrivilege",
 109          "Increase base priority"},
 110
 111         {SEC_PRIV_LOAD_DRIVER,
 112          SEC_PRIV_LOAD_DRIVER_BIT,
 113          "SeLoadDriverPrivilege",
 114         "Load drivers"},
 115
 116         {SEC_PRIV_CREATE_PAGEFILE,
 117          SEC_PRIV_CREATE_PAGEFILE_BIT,
 118          "SeCreatePagefilePrivilege",
 119         "Create page files"},
 120
 121         {SEC_PRIV_INCREASE_QUOTA,
 122          SEC_PRIV_INCREASE_QUOTA_BIT,
 123          "SeIncreaseQuotaPrivilege",
 124         "Increase quota"},
 125
 126         {SEC_PRIV_CHANGE_NOTIFY,
 127          SEC_PRIV_CHANGE_NOTIFY_BIT,
 128          "SeChangeNotifyPrivilege",
 129         "Register for change notify"},
 130
 131         {SEC_PRIV_UNDOCK,
 132          SEC_PRIV_UNDOCK_BIT,
 133          "SeUndockPrivilege",
 134         "Undock devices"},
 135
 136         {SEC_PRIV_MANAGE_VOLUME,
 137          SEC_PRIV_MANAGE_VOLUME_BIT,
 138          "SeManageVolumePrivilege",
 139         "Manage system volumes"},
 140
 141         {SEC_PRIV_IMPERSONATE,
 142          SEC_PRIV_IMPERSONATE_BIT,
 143          "SeImpersonatePrivilege",
 144         "Impersonate users"},
 145
 146         {SEC_PRIV_CREATE_GLOBAL,
 147          SEC_PRIV_CREATE_GLOBAL_BIT,
 148          "SeCreateGlobalPrivilege",
 149         "Create global"},
 150
 151         {SEC_PRIV_ENABLE_DELEGATION,
 152          SEC_PRIV_ENABLE_DELEGATION_BIT,
 153          "SeEnableDelegationPrivilege",
 154         "Enable Delegation"},
 155
 156         {SEC_PRIV_INTERACTIVE_LOGON,
 157          SEC_PRIV_INTERACTIVE_LOGON_BIT,
 158          "SeInteractiveLogonRight",
 159         "Interactive logon"},
 160
 161         {SEC_PRIV_NETWORK_LOGON,
 162          SEC_PRIV_NETWORK_LOGON_BIT,
 163          "SeNetworkLogonRight",
 164         "Network logon"},
 165
 166         {SEC_PRIV_REMOTE_INTERACTIVE_LOGON,
 167          SEC_PRIV_REMOTE_INTERACTIVE_LOGON_BIT,
 168          "SeRemoteInteractiveLogonRight",
 169         "Remote Interactive logon"}
 170 };
 171
 172 /*
 173   return a privilege mask given a privilege id
 174 */
 175 uint64_t sec_privilege_mask(enum sec_privilege privilege)
 176 {
 177         int i;
 178         for (i=0;i<ARRAY_SIZE(privs);i++) {
 179                 if (privs[i].luid == privilege) {
 180                         return privs[i].privilege_mask;
 181                 }
 182         }
 183
 184         return 0;
 185 }
 186
 187 /***************************************************************************
 188  put all valid privileges into a mask
 189 ****************************************************************************/
 190
 191 void se_priv_put_all_privileges(uint64_t *privilege_mask)
 192 {
 193         int i;
 194         uint32_t num_privs = ARRAY_SIZE(privs);
 195
 196         *privilege_mask = 0;
 197         for ( i=0; i<num_privs; i++ ) {
 198                 *privilege_mask |= privs[i].privilege_mask;
 199         }
 200 }
 201
 202 /*********************************************************************
 203  Lookup the uint64_t bitmask value for a privilege name
 204 *********************************************************************/
 205
 206 bool se_priv_from_name( const char *name, uint64_t *privilege_mask )
 207 {
 208         int i;
 209         uint32_t num_privs = ARRAY_SIZE(privs);
 210         for ( i=0; i<num_privs; i++ ) {
 211                 if ( strequal( privs[i].name, name ) ) {
 212                         *privilege_mask = privs[i].privilege_mask;
 213                         return true;
 214                 }
 215         }
 216
 217         return false;
 218 }
 219
 220 const char* get_privilege_dispname( const char *name )
 221 {
 222         int i;
 223
 224         uint32_t num_privs = ARRAY_SIZE(privs);
 225
 226         if (!name) {
 227                 return NULL;
 228         }
 229
 230         for ( i=0; i<num_privs; i++ ) {
 231                 if ( strequal( privs[i].name, name ) ) {
 232                         return privs[i].description;
 233                 }
 234         }
 235
 236         return NULL;
 237 }
 238
 239 /*******************************************************************
 240  return the number of elements in the 'short' privlege array (traditional source3 behaviour)
 241 *******************************************************************/
 242
 243 int num_privileges_in_short_list( void )
 244 {
 245         return NUM_SHORT_LIST_PRIVS;
 246 }
 247
 248 /****************************************************************************
 249  add a privilege to a privilege array
 250  ****************************************************************************/
 251
 252 static bool privilege_set_add(PRIVILEGE_SET *priv_set, struct lsa_LUIDAttribute set)
 253 {
 254         struct lsa_LUIDAttribute *new_set;
 255
 256         /* we can allocate memory to add the new privilege */
 257
 258         new_set = talloc_realloc(priv_set->mem_ctx, priv_set->set, struct lsa_LUIDAttribute, priv_set->count + 1);
 259         if ( !new_set ) {
 260                 DEBUG(0,("privilege_set_add: failed to allocate memory!\n"));
 261                 return false;
 262         }
 263
 264         new_set[priv_set->count].luid.high = set.luid.high;
 265         new_set[priv_set->count].luid.low = set.luid.low;
 266         new_set[priv_set->count].attribute = set.attribute;
 267
 268         priv_set->count++;
 269         priv_set->set = new_set;
 270
 271         return true;
 272 }
 273
 274 /*******************************************************************
 275 *******************************************************************/
 276
 277 bool se_priv_to_privilege_set( PRIVILEGE_SET *set, uint64_t privilege_mask )
 278 {
 279         int i;
 280         uint32_t num_privs = ARRAY_SIZE(privs);
 281         struct lsa_LUIDAttribute luid;
 282
 283         luid.attribute = 0;
 284         luid.luid.high = 0;
 285
 286         for ( i=0; i<num_privs; i++ ) {
 287                 if ((privilege_mask & privs[i].privilege_mask) == 0)
 288                         continue;
 289
 290                 luid.luid.high = 0;
 291                 luid.luid.low = privs[i].luid;
 292
 293                 if ( !privilege_set_add( set, luid ) )
 294                         return false;
 295         }
 296
 297         return true;
 298 }
 299
 300 /*******************************************************************
 301 *******************************************************************/
 302
 303 bool privilege_set_to_se_priv( uint64_t *privilege_mask, struct lsa_PrivilegeSet *privset )
 304 {
 305         int i;
 306
 307         ZERO_STRUCTP( privilege_mask );
 308
 309         for ( i=0; i<privset->count; i++ ) {
 310                 uint64_t r;
 311
 312                 /* sanity check for invalid privilege.  we really
 313                    only care about the low 32 bits */
 314
 315                 if ( privset->set[i].luid.high != 0 )
 316                         return false;
 317
 318                 r = sec_privilege_mask(privset->set[i].luid.low);
 319                 if (r) {
 320                         *privilege_mask |= r;
 321                 }
 322         }
 323
 324         return true;
 325 }
 326
 327 /*
 328   map a privilege id to the wire string constant
 329 */
 330 const char *sec_privilege_name(enum sec_privilege privilege)
 331 {
 332         int i;
 333         for (i=0;i<ARRAY_SIZE(privs);i++) {
 334                 if (privs[i].luid == privilege) {
 335                         return privs[i].name;
 336                 }
 337         }
 338         return NULL;
 339 }
 340
 341 /*
 342   map a privilege id to a privilege display name. Return NULL if not found
 343
 344   TODO: this should use language mappings
 345 */
 346 const char *sec_privilege_display_name(enum sec_privilege privilege, uint16_t *language)
 347 {
 348         int i;
 349         for (i=0;i<ARRAY_SIZE(privs);i++) {
 350                 if (privs[i].luid == privilege) {
 351                         return privs[i].description;
 352                 }
 353         }
 354         return NULL;
 355 }
 356
 357 /*
 358   map a privilege name to a privilege id. Return -1 if not found
 359 */
 360 enum sec_privilege sec_privilege_id(const char *name)
 361 {
 362         int i;
 363         for (i=0;i<ARRAY_SIZE(privs);i++) {
 364                 if (strcasecmp(privs[i].name, name) == 0) {
 365                         return privs[i].luid;
 366                 }
 367         }
 368         return SEC_PRIV_INVALID;
 369 }
 370
 371 /*
 372   assist in walking the table of privileges - return the LUID (low 32 bits) by index
 373 */
 374 enum sec_privilege sec_privilege_from_index(int idx)
 375 {
 376         if (idx >= 0 && idx<ARRAY_SIZE(privs)) {
 377                 return privs[idx].luid;
 378         }
 379         return SEC_PRIV_INVALID;
 380 }
 381
 382 /*
 383   assist in walking the table of privileges - return the string constant by index
 384 */
 385 const char *sec_privilege_name_from_index(int idx)
 386 {
 387         if (idx >= 0 && idx<ARRAY_SIZE(privs)) {
 388                 return privs[idx].name;
 389         }
 390         return NULL;
 391 }
 392
 393
 394
 395 /*
 396   return true if a security_token has a particular privilege bit set
 397 */
 398 bool security_token_has_privilege(const struct security_token *token, enum sec_privilege privilege)
 399 {
 400         uint64_t mask;
 401
 402         mask = sec_privilege_mask(privilege);
 403         if (mask == 0) {
 404                 return false;
 405         }
 406
 407         if (token->privilege_mask & mask) {
 408                 return true;
 409         }
 410         return false;
 411 }
 412
 413 /*
 414   set a bit in the privilege mask
 415 */
 416 void security_token_set_privilege(struct security_token *token, enum sec_privilege privilege)
 417 {
 418         /* Relies on the fact that an invalid privilage will return 0, so won't change this */
 419         token->privilege_mask |= sec_privilege_mask(privilege);
 420 }
 421
 422 void security_token_debug_privileges(int dbg_lev, const struct security_token *token)
 423 {
 424         DEBUGADD(dbg_lev, (" Privileges (0x%16llX):\n",
 425                             (unsigned long long) token->privilege_mask));
 426
 427         if (token->privilege_mask) {
 428                 int idx = 0;
 429                 int i = 0;
 430                 for (idx = 0; idx<ARRAY_SIZE(privs); idx++) {
 431                         if (token->privilege_mask & privs[idx].privilege_mask) {
 432                                 DEBUGADD(dbg_lev, ("  Privilege[%3lu]: %s\n", (unsigned long)i++,
 433                                                    privs[idx].name));
 434                         }
 435                 }
 436         }
 437 }