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 };
 194
 195 const char *sid_type_lookup(uint32_t sid_type)
 196 {
 197         int i;
 198
 199         /* Look through list */
 200         for (i=0; i < ARRAY_SIZE(sid_name_type); i++) {
 201                 if (sid_name_type[i].sid_type == sid_type) {
 202                         return sid_name_type[i].string;
 203                 }
 204         }
 205
 206         /* Default return */
 207         return "SID *TYPE* is INVALID";
 208 }
 209
 210 /**************************************************************************
 211  Create the SYSTEM token.
 212 ***************************************************************************/
 213
 214 const struct security_token *get_system_token(void)
 215 {
 216         return &system_token;
 217 }
 218
 219 bool sid_compose(struct dom_sid *dst, const struct dom_sid *domain_sid, uint32_t rid)
 220 {
 221         sid_copy(dst, domain_sid);
 222         return sid_append_rid(dst, rid);
 223 }
 224
 225 /*****************************************************************
 226  Removes the last rid from the end of a sid
 227 *****************************************************************/
 228
 229 bool sid_split_rid(struct dom_sid *sid, uint32_t *rid)
 230 {
 231         if (sid->num_auths > 0) {
 232                 sid->num_auths--;
 233                 if (rid != NULL) {
 234                         *rid = sid->sub_auths[sid->num_auths];
 235                 }
 236                 return true;
 237         }
 238         return false;
 239 }
 240
 241 /*****************************************************************
 242  Return the last rid from the end of a sid
 243 *****************************************************************/
 244
 245 bool sid_peek_rid(const struct dom_sid *sid, uint32_t *rid)
 246 {
 247         if (!sid || !rid)
 248                 return false;
 249
 250         if (sid->num_auths > 0) {
 251                 *rid = sid->sub_auths[sid->num_auths - 1];
 252                 return true;
 253         }
 254         return false;
 255 }
 256
 257 /*****************************************************************
 258  Return the last rid from the end of a sid
 259  and check the sid against the exp_dom_sid
 260 *****************************************************************/
 261
 262 bool sid_peek_check_rid(const struct dom_sid *exp_dom_sid, const struct dom_sid *sid, uint32_t *rid)
 263 {
 264         if (!exp_dom_sid || !sid || !rid)
 265                 return false;
 266
 267         if (sid->num_auths != (exp_dom_sid->num_auths+1)) {
 268                 return false;
 269         }
 270
 271         if (sid_compare_domain(exp_dom_sid, sid)!=0){
 272                 *rid=(-1);
 273                 return false;
 274         }
 275
 276         return sid_peek_rid(sid, rid);
 277 }
 278
 279 /*****************************************************************
 280  Copies a sid
 281 *****************************************************************/
 282
 283 void sid_copy(struct dom_sid *dst, const struct dom_sid *src)
 284 {
 285         int i;
 286
 287         *dst = (struct dom_sid) {
 288                 .sid_rev_num = src->sid_rev_num,
 289                 .num_auths = src->num_auths,
 290         };
 291
 292         memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth));
 293
 294         for (i = 0; i < src->num_auths; i++)
 295                 dst->sub_auths[i] = src->sub_auths[i];
 296 }
 297
 298 /*****************************************************************
 299  Parse a on-the-wire SID to a struct dom_sid.
 300 *****************************************************************/
 301
 302 bool sid_parse(const uint8_t *inbuf, size_t len, struct dom_sid *sid)
 303 {
 304         DATA_BLOB in = data_blob_const(inbuf, len);
 305         enum ndr_err_code ndr_err;
 306
 307         ndr_err = ndr_pull_struct_blob_all(
 308                 &in, NULL, sid, (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
 309         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 310                 return false;
 311         }
 312         return true;
 313 }
 314
 315 /*****************************************************************
 316  See if 2 SIDs are in the same domain
 317  this just compares the leading sub-auths
 318 *****************************************************************/
 319
 320 int sid_compare_domain(const struct dom_sid *sid1, const struct dom_sid *sid2)
 321 {
 322         int n, i;
 323
 324         n = MIN(sid1->num_auths, sid2->num_auths);
 325
 326         for (i = n-1; i >= 0; --i)
 327                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
 328                         return sid1->sub_auths[i] - sid2->sub_auths[i];
 329
 330         return dom_sid_compare_auth(sid1, sid2);
 331 }
 332
 333 /********************************************************************
 334  Add SID to an array SIDs
 335 ********************************************************************/
 336
 337 NTSTATUS add_sid_to_array(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
 338                           struct dom_sid **sids, uint32_t *num)
 339 {
 340         *sids = talloc_realloc(mem_ctx, *sids, struct dom_sid,
 341                                (*num)+1);
 342         if (*sids == NULL) {
 343                 *num = 0;
 344                 return NT_STATUS_NO_MEMORY;
 345         }
 346
 347         sid_copy(&((*sids)[*num]), sid);
 348         *num += 1;
 349
 350         return NT_STATUS_OK;
 351 }
 352
 353
 354 /********************************************************************
 355  Add SID to an array SIDs ensuring that it is not already there
 356 ********************************************************************/
 357
 358 NTSTATUS add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
 359                                  struct dom_sid **sids, uint32_t *num_sids)
 360 {
 361         uint32_t i;
 362
 363         for (i=0; i<(*num_sids); i++) {
 364                 if (dom_sid_equal(sid, &(*sids)[i])) {
 365                         return NT_STATUS_OK;
 366                 }
 367         }
 368
 369         return add_sid_to_array(mem_ctx, sid, sids, num_sids);
 370 }
 371
 372 /********************************************************************
 373  Remove SID from an array
 374 ********************************************************************/
 375
 376 void del_sid_from_array(const struct dom_sid *sid, struct dom_sid **sids,
 377                         uint32_t *num)
 378 {
 379         struct dom_sid *sid_list = *sids;
 380         uint32_t i;
 381
 382         for ( i=0; i<*num; i++ ) {
 383
 384                 /* if we find the SID, then decrement the count
 385                    and break out of the loop */
 386
 387                 if (dom_sid_equal(sid, &sid_list[i])) {
 388                         *num -= 1;
 389                         break;
 390                 }
 391         }
 392
 393         /* This loop will copy the remainder of the array
 394            if i < num of sids in the array */
 395
 396         for ( ; i<*num; i++ ) {
 397                 sid_copy( &sid_list[i], &sid_list[i+1] );
 398         }
 399
 400         return;
 401 }
 402
 403 bool add_rid_to_array_unique(TALLOC_CTX *mem_ctx,
 404                              uint32_t rid, uint32_t **pp_rids, size_t *p_num)
 405 {
 406         size_t i;
 407
 408         for (i=0; i<*p_num; i++) {
 409                 if ((*pp_rids)[i] == rid)
 410                         return true;
 411         }
 412
 413         *pp_rids = talloc_realloc(mem_ctx, *pp_rids, uint32_t, *p_num+1);
 414
 415         if (*pp_rids == NULL) {
 416                 *p_num = 0;
 417                 return false;
 418         }
 419
 420         (*pp_rids)[*p_num] = rid;
 421         *p_num += 1;
 422         return true;
 423 }
 424
 425 bool is_null_sid(const struct dom_sid *sid)
 426 {
 427         static const struct dom_sid null_sid = {0};
 428         return dom_sid_equal(sid, &null_sid);
 429 }