libcli/security/util_sid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Andrew Tridgell                1992-1998
   5    Copyright (C) Luke Kenneth Caseson Leighton  1998-1999
   6    Copyright (C) Jeremy Allison                 1999
   7    Copyright (C) Stefan (metze) Metzmacher      2002
   8    Copyright (C) Simo Sorce                     2002
   9    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2005
  10    Copyright (C) Andrew Bartlett                2010
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 #include "includes.h"
  27 #include "../librpc/gen_ndr/ndr_security.h"
  28 #include "../librpc/gen_ndr/netlogon.h"
  29 #include "../libcli/security/security.h"
  30
  31 /*
  32  * Some useful sids, more well known sids can be found at
  33  * http://support.microsoft.com/kb/243330/EN-US/
  34  */
  35
  36
  37 /* S-1 */
  38 const struct dom_sid global_sid_World_Domain =               /* Everyone domain */
  39 { 1, 0, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  40 /* S-1-1 */
  41 const struct dom_sid global_sid_World =                      /* Everyone */
  42 { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  43 /* S-1-2 */
  44 const struct dom_sid global_sid_Local_Authority =            /* Local Authority */
  45 { 1, 0, {0,0,0,0,0,2}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  46 /* S-1-3 */
  47 const struct dom_sid global_sid_Creator_Owner_Domain =       /* Creator Owner domain */
  48 { 1, 0, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  49 /* S-1-5 */
  50 const struct dom_sid global_sid_NT_Authority =                  /* NT Authority */
  51 { 1, 0, {0,0,0,0,0,5}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  52 /* S-1-5-18 */
  53 const struct dom_sid global_sid_System =                        /* System */
  54 { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  55 /* S-1-0 */
  56 const struct dom_sid global_sid_NULL =                          /* NULL sid */
  57 { 1, 1, {0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  58 /* S-1-5-11 */
  59 const struct dom_sid global_sid_Authenticated_Users =   /* All authenticated rids */
  60 { 1, 1, {0,0,0,0,0,5}, {11,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  61 #if 0
  62 /* for documentation S-1-5-12 */
  63 const struct dom_sid global_sid_Restriced =                     /* Restriced Code */
  64 { 1, 1, {0,0,0,0,0,5}, {12,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  65 #endif
  66
  67 /* S-1-18 */
  68 const struct dom_sid global_sid_Asserted_Identity =       /* Asserted Identity */
  69 { 1, 0, {0,0,0,0,0,18}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  70 /* S-1-18-1 */
  71 const struct dom_sid global_sid_Asserted_Identity_Service =     /* Asserted Identity Service */
  72 { 1, 1, {0,0,0,0,0,18}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  73 /* S-1-18-2 */
  74 const struct dom_sid global_sid_Asserted_Identity_Authentication_Authority =    /* Asserted Identity Authentication Authority */
  75 { 1, 1, {0,0,0,0,0,18}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  76
  77 /* S-1-5-2 */
  78 const struct dom_sid global_sid_Network =                       /* Network rids */
  79 { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  80
  81 /* S-1-3 */
  82 const struct dom_sid global_sid_Creator_Owner =         /* Creator Owner */
  83 { 1, 1, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  84 /* S-1-3-1 */
  85 const struct dom_sid global_sid_Creator_Group =         /* Creator Group */
  86 { 1, 1, {0,0,0,0,0,3}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  87 /* S-1-3-4 */
  88 const struct dom_sid global_sid_Owner_Rights =          /* Owner Rights */
  89 { 1, 1, {0,0,0,0,0,3}, {4,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  90 /* S-1-5-7 */
  91 const struct dom_sid global_sid_Anonymous =                     /* Anonymous login */
  92 { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  93 /* S-1-5-9 */
  94 const struct dom_sid global_sid_Enterprise_DCs =                /* Enterprise DCs */
  95 { 1, 1, {0,0,0,0,0,5}, {9,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  96 /* S-1-5-32 */
  97 const struct dom_sid global_sid_Builtin =                       /* Local well-known domain */
  98 { 1, 1, {0,0,0,0,0,5}, {32,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  99 /* S-1-5-32-544 */
 100 const struct dom_sid global_sid_Builtin_Administrators =        /* Builtin administrators */
 101 { 1, 2, {0,0,0,0,0,5}, {32,544,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 102 /* S-1-5-32-545 */
 103 const struct dom_sid global_sid_Builtin_Users =         /* Builtin users */
 104 { 1, 2, {0,0,0,0,0,5}, {32,545,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 105 /* S-1-5-32-546 */
 106 const struct dom_sid global_sid_Builtin_Guests =                /* Builtin guest users */
 107 { 1, 2, {0,0,0,0,0,5}, {32,546,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 108 /* S-1-5-32-547 */
 109 const struct dom_sid global_sid_Builtin_Power_Users =   /* Builtin power users */
 110 { 1, 2, {0,0,0,0,0,5}, {32,547,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 111 /* S-1-5-32-548 */
 112 const struct dom_sid global_sid_Builtin_Account_Operators =     /* Builtin account operators */
 113 { 1, 2, {0,0,0,0,0,5}, {32,548,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 114 /* S-1-5-32-549 */
 115 const struct dom_sid global_sid_Builtin_Server_Operators =      /* Builtin server operators */
 116 { 1, 2, {0,0,0,0,0,5}, {32,549,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 117 /* S-1-5-32-550 */
 118 const struct dom_sid global_sid_Builtin_Print_Operators =       /* Builtin print operators */
 119 { 1, 2, {0,0,0,0,0,5}, {32,550,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 120 /* S-1-5-32-551 */
 121 const struct dom_sid global_sid_Builtin_Backup_Operators =      /* Builtin backup operators */
 122 { 1, 2, {0,0,0,0,0,5}, {32,551,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 123 /* S-1-5-32-552 */
 124 const struct dom_sid global_sid_Builtin_Replicator =            /* Builtin replicator */
 125 { 1, 2, {0,0,0,0,0,5}, {32,552,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 126 /* S-1-5-32-554 */
 127 const struct dom_sid global_sid_Builtin_PreWin2kAccess =        /* Builtin pre win2k access */
 128 { 1, 2, {0,0,0,0,0,5}, {32,554,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 129
 130 /* S-1-22-1 */
 131 const struct dom_sid global_sid_Unix_Users =                    /* Unmapped Unix users */
 132 { 1, 1, {0,0,0,0,0,22}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 133 /* S-1-22-2 */
 134 const struct dom_sid global_sid_Unix_Groups =                   /* Unmapped Unix groups */
 135 { 1, 1, {0,0,0,0,0,22}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 136
 137 /*
 138  * http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx
 139  */
 140 /* S-1-5-88 */
 141 const struct dom_sid global_sid_Unix_NFS =             /* MS NFS and Apple style */
 142 { 1, 1, {0,0,0,0,0,5}, {88,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 143 /* S-1-5-88-1 */
 144 const struct dom_sid global_sid_Unix_NFS_Users =                /* Unix uid, MS NFS and Apple style */
 145 { 1, 2, {0,0,0,0,0,5}, {88,1,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 146 /* S-1-5-88-2 */
 147 const struct dom_sid global_sid_Unix_NFS_Groups =               /* Unix gid, MS NFS and Apple style */
 148 { 1, 2, {0,0,0,0,0,5}, {88,2,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 149 /* S-1-5-88-3 */
 150 const struct dom_sid global_sid_Unix_NFS_Mode =                 /* Unix mode */
 151 { 1, 2, {0,0,0,0,0,5}, {88,3,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 152 /* Unused, left here for documentary purposes */
 153 #if 0
 154 const struct dom_sid global_sid_Unix_NFS_Other =                /* Unix other, MS NFS and Apple style */
 155 { 1, 2, {0,0,0,0,0,5}, {88,4,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 156 #endif
 157
 158 /* Unused, left here for documentary purposes */
 159 #if 0
 160 #define SECURITY_NULL_SID_AUTHORITY    0
 161 #define SECURITY_WORLD_SID_AUTHORITY   1
 162 #define SECURITY_LOCAL_SID_AUTHORITY   2
 163 #define SECURITY_CREATOR_SID_AUTHORITY 3
 164 #define SECURITY_NT_AUTHORITY          5
 165 #endif
 166
 167 static struct dom_sid system_sid_array[1] =
 168 { { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
 169 static const struct security_token system_token = {
 170         .num_sids       = ARRAY_SIZE(system_sid_array),
 171         .sids           = system_sid_array,
 172         .privilege_mask = SE_ALL_PRIVS
 173 };
 174
 175 /****************************************************************************
 176  Lookup string names for SID types.
 177 ****************************************************************************/
 178
 179 static const struct {
 180         enum lsa_SidType sid_type;
 181         const char *string;
 182 } sid_name_type[] = {
 183         {SID_NAME_USE_NONE, "None"},
 184         {SID_NAME_USER, "User"},
 185         {SID_NAME_DOM_GRP, "Domain Group"},
 186         {SID_NAME_DOMAIN, "Domain"},
 187         {SID_NAME_ALIAS, "Local Group"},
 188         {SID_NAME_WKN_GRP, "Well-known Group"},
 189         {SID_NAME_DELETED, "Deleted Account"},
 190         {SID_NAME_INVALID, "Invalid Account"},
 191         {SID_NAME_UNKNOWN, "UNKNOWN"},
 192         {SID_NAME_COMPUTER, "Computer"},
 193         {SID_NAME_LABEL, "Mandatory Label"}
 194 };
 195
 196 const char *sid_type_lookup(uint32_t sid_type)
 197 {
 198         size_t i;
 199
 200         /* Look through list */
 201         for (i=0; i < ARRAY_SIZE(sid_name_type); i++) {
 202                 if (sid_name_type[i].sid_type == sid_type) {
 203                         return sid_name_type[i].string;
 204                 }
 205         }
 206
 207         /* Default return */
 208         return "SID *TYPE* is INVALID";
 209 }
 210
 211 /**************************************************************************
 212  Create the SYSTEM token.
 213 ***************************************************************************/
 214
 215 const struct security_token *get_system_token(void)
 216 {
 217         return &system_token;
 218 }
 219
 220 bool sid_compose(struct dom_sid *dst, const struct dom_sid *domain_sid, uint32_t rid)
 221 {
 222         sid_copy(dst, domain_sid);
 223         return sid_append_rid(dst, rid);
 224 }
 225
 226 /*****************************************************************
 227  Removes the last rid from the end of a sid
 228 *****************************************************************/
 229
 230 bool sid_split_rid(struct dom_sid *sid, uint32_t *rid)
 231 {
 232         if (sid->num_auths > 0) {
 233                 sid->num_auths--;
 234                 if (rid != NULL) {
 235                         *rid = sid->sub_auths[sid->num_auths];
 236                 }
 237                 return true;
 238         }
 239         return false;
 240 }
 241
 242 /*****************************************************************
 243  Return the last rid from the end of a sid
 244 *****************************************************************/
 245
 246 bool sid_peek_rid(const struct dom_sid *sid, uint32_t *rid)
 247 {
 248         if (!sid || !rid)
 249                 return false;
 250
 251         if (sid->num_auths > 0) {
 252                 *rid = sid->sub_auths[sid->num_auths - 1];
 253                 return true;
 254         }
 255         return false;
 256 }
 257
 258 /*****************************************************************
 259  Return the last rid from the end of a sid
 260  and check the sid against the exp_dom_sid
 261 *****************************************************************/
 262
 263 bool sid_peek_check_rid(const struct dom_sid *exp_dom_sid, const struct dom_sid *sid, uint32_t *rid)
 264 {
 265         if (!exp_dom_sid || !sid || !rid)
 266                 return false;
 267
 268         if (sid->num_auths != (exp_dom_sid->num_auths+1)) {
 269                 return false;
 270         }
 271
 272         if (sid_compare_domain(exp_dom_sid, sid)!=0){
 273                 *rid=(-1);
 274                 return false;
 275         }
 276
 277         return sid_peek_rid(sid, rid);
 278 }
 279
 280 /*****************************************************************
 281  Copies a sid
 282 *****************************************************************/
 283
 284 void sid_copy(struct dom_sid *dst, const struct dom_sid *src)
 285 {
 286         int i;
 287
 288         *dst = (struct dom_sid) {
 289                 .sid_rev_num = src->sid_rev_num,
 290                 .num_auths = src->num_auths,
 291         };
 292
 293         memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth));
 294
 295         for (i = 0; i < src->num_auths; i++)
 296                 dst->sub_auths[i] = src->sub_auths[i];
 297 }
 298
 299 /*****************************************************************
 300  Parse a on-the-wire SID to a struct dom_sid.
 301 *****************************************************************/
 302
 303 bool sid_parse(const uint8_t *inbuf, size_t len, struct dom_sid *sid)
 304 {
 305         DATA_BLOB in = data_blob_const(inbuf, len);
 306         enum ndr_err_code ndr_err;
 307
 308         ndr_err = ndr_pull_struct_blob_all(
 309                 &in, NULL, sid, (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
 310         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 311                 return false;
 312         }
 313         return true;
 314 }
 315
 316 /*****************************************************************
 317  See if 2 SIDs are in the same domain
 318  this just compares the leading sub-auths
 319 *****************************************************************/
 320
 321 int sid_compare_domain(const struct dom_sid *sid1, const struct dom_sid *sid2)
 322 {
 323         int n, i;
 324
 325         n = MIN(sid1->num_auths, sid2->num_auths);
 326
 327         for (i = n-1; i >= 0; --i)
 328                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
 329                         return sid1->sub_auths[i] - sid2->sub_auths[i];
 330
 331         return dom_sid_compare_auth(sid1, sid2);
 332 }
 333
 334 /********************************************************************
 335  Add SID to an array SIDs
 336 ********************************************************************/
 337
 338 NTSTATUS add_sid_to_array(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
 339                           struct dom_sid **sids, uint32_t *num)
 340 {
 341         struct dom_sid *tmp;
 342
 343         if ((*num) == UINT32_MAX) {
 344                 return NT_STATUS_INTEGER_OVERFLOW;
 345         }
 346
 347         tmp = talloc_realloc(mem_ctx, *sids, struct dom_sid, (*num)+1);
 348         if (tmp == NULL) {
 349                 *num = 0;
 350                 return NT_STATUS_NO_MEMORY;
 351         }
 352         *sids = tmp;
 353
 354         sid_copy(&((*sids)[*num]), sid);
 355         *num += 1;
 356
 357         return NT_STATUS_OK;
 358 }
 359
 360
 361 /********************************************************************
 362  Add SID to an array SIDs ensuring that it is not already there
 363 ********************************************************************/
 364
 365 NTSTATUS add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
 366                                  struct dom_sid **sids, uint32_t *num_sids)
 367 {
 368         uint32_t i;
 369
 370         for (i=0; i<(*num_sids); i++) {
 371                 if (dom_sid_equal(sid, &(*sids)[i])) {
 372                         return NT_STATUS_OK;
 373                 }
 374         }
 375
 376         return add_sid_to_array(mem_ctx, sid, sids, num_sids);
 377 }
 378
 379 /********************************************************************
 380  Remove SID from an array
 381 ********************************************************************/
 382
 383 void del_sid_from_array(const struct dom_sid *sid, struct dom_sid **sids,
 384                         uint32_t *num)
 385 {
 386         struct dom_sid *sid_list = *sids;
 387         uint32_t i;
 388
 389         for ( i=0; i<*num; i++ ) {
 390
 391                 /* if we find the SID, then decrement the count
 392                    and break out of the loop */
 393
 394                 if (dom_sid_equal(sid, &sid_list[i])) {
 395                         *num -= 1;
 396                         break;
 397                 }
 398         }
 399
 400         /* This loop will copy the remainder of the array
 401            if i < num of sids in the array */
 402
 403         for ( ; i<*num; i++ ) {
 404                 sid_copy( &sid_list[i], &sid_list[i+1] );
 405         }
 406
 407         return;
 408 }
 409
 410 bool add_rid_to_array_unique(TALLOC_CTX *mem_ctx,
 411                              uint32_t rid, uint32_t **pp_rids, size_t *p_num)
 412 {
 413         size_t i;
 414
 415         for (i=0; i<*p_num; i++) {
 416                 if ((*pp_rids)[i] == rid)
 417                         return true;
 418         }
 419
 420         *pp_rids = talloc_realloc(mem_ctx, *pp_rids, uint32_t, *p_num+1);
 421
 422         if (*pp_rids == NULL) {
 423                 *p_num = 0;
 424                 return false;
 425         }
 426
 427         (*pp_rids)[*p_num] = rid;
 428         *p_num += 1;
 429         return true;
 430 }
 431
 432 bool is_null_sid(const struct dom_sid *sid)
 433 {
 434         const struct dom_sid null_sid = {0};
 435         return dom_sid_equal(sid, &null_sid);
 436 }