source3/lib/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
  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 #include "includes.h"
  26 #include "libcli/security/dom_sid.h"
  27
  28 /*
  29  * Some useful sids, more well known sids can be found at
  30  * http://support.microsoft.com/kb/243330/EN-US/
  31  */
  32
  33
  34 const DOM_SID global_sid_World_Domain =               /* Everyone domain */
  35 { 1, 0, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  36 const DOM_SID global_sid_World =                      /* Everyone */
  37 { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  38 const DOM_SID global_sid_Creator_Owner_Domain =       /* Creator Owner domain */
  39 { 1, 0, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  40 const DOM_SID global_sid_NT_Authority =                 /* NT Authority */
  41 { 1, 0, {0,0,0,0,0,5}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  42 const DOM_SID global_sid_System =                       /* System */
  43 { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  44 const DOM_SID global_sid_NULL =                         /* NULL sid */
  45 { 1, 1, {0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  46 const DOM_SID global_sid_Authenticated_Users =  /* All authenticated rids */
  47 { 1, 1, {0,0,0,0,0,5}, {11,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  48 #if 0
  49 /* for documentation */
  50 const DOM_SID global_sid_Restriced =                    /* Restriced Code */
  51 { 1, 1, {0,0,0,0,0,5}, {12,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  52 #endif
  53 const DOM_SID global_sid_Network =                      /* Network rids */
  54 { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  55
  56 const DOM_SID global_sid_Creator_Owner =                /* Creator Owner */
  57 { 1, 1, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  58 const DOM_SID global_sid_Creator_Group =                /* Creator Group */
  59 { 1, 1, {0,0,0,0,0,3}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  60 const DOM_SID global_sid_Anonymous =                    /* Anonymous login */
  61 { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  62
  63 const DOM_SID global_sid_Builtin =                      /* Local well-known domain */
  64 { 1, 1, {0,0,0,0,0,5}, {32,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  65 const DOM_SID global_sid_Builtin_Administrators =       /* Builtin administrators */
  66 { 1, 2, {0,0,0,0,0,5}, {32,544,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  67 const DOM_SID global_sid_Builtin_Users =                /* Builtin users */
  68 { 1, 2, {0,0,0,0,0,5}, {32,545,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  69 const DOM_SID global_sid_Builtin_Guests =               /* Builtin guest users */
  70 { 1, 2, {0,0,0,0,0,5}, {32,546,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  71 const DOM_SID global_sid_Builtin_Power_Users =  /* Builtin power users */
  72 { 1, 2, {0,0,0,0,0,5}, {32,547,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  73 const DOM_SID global_sid_Builtin_Account_Operators =    /* Builtin account operators */
  74 { 1, 2, {0,0,0,0,0,5}, {32,548,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  75 const DOM_SID global_sid_Builtin_Server_Operators =     /* Builtin server operators */
  76 { 1, 2, {0,0,0,0,0,5}, {32,549,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  77 const DOM_SID global_sid_Builtin_Print_Operators =      /* Builtin print operators */
  78 { 1, 2, {0,0,0,0,0,5}, {32,550,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  79 const DOM_SID global_sid_Builtin_Backup_Operators =     /* Builtin backup operators */
  80 { 1, 2, {0,0,0,0,0,5}, {32,551,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  81 const DOM_SID global_sid_Builtin_Replicator =           /* Builtin replicator */
  82 { 1, 2, {0,0,0,0,0,5}, {32,552,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  83 const DOM_SID global_sid_Builtin_PreWin2kAccess =       /* Builtin pre win2k access */
  84 { 1, 2, {0,0,0,0,0,5}, {32,554,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  85
  86 const DOM_SID global_sid_Unix_Users =                   /* Unmapped Unix users */
  87 { 1, 1, {0,0,0,0,0,22}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  88 const DOM_SID global_sid_Unix_Groups =                  /* Unmapped Unix groups */
  89 { 1, 1, {0,0,0,0,0,22}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  90
  91 /* Unused, left here for documentary purposes */
  92 #if 0
  93 #define SECURITY_NULL_SID_AUTHORITY    0
  94 #define SECURITY_WORLD_SID_AUTHORITY   1
  95 #define SECURITY_LOCAL_SID_AUTHORITY   2
  96 #define SECURITY_CREATOR_SID_AUTHORITY 3
  97 #define SECURITY_NT_AUTHORITY          5
  98 #endif
  99
 100 /*
 101  * An NT compatible anonymous token.
 102  */
 103
 104 static DOM_SID anon_sid_array[3] =
 105 { { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}},
 106   { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}},
 107   { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
 108 NT_USER_TOKEN anonymous_token = { 3, anon_sid_array, SE_NONE };
 109
 110 static DOM_SID system_sid_array[1] =
 111 { { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
 112 NT_USER_TOKEN system_token = { 1, system_sid_array, SE_ALL_PRIVS };
 113
 114 /****************************************************************************
 115  Lookup string names for SID types.
 116 ****************************************************************************/
 117
 118 static const struct {
 119         enum lsa_SidType sid_type;
 120         const char *string;
 121 } sid_name_type[] = {
 122         {SID_NAME_USER, "User"},
 123         {SID_NAME_DOM_GRP, "Domain Group"},
 124         {SID_NAME_DOMAIN, "Domain"},
 125         {SID_NAME_ALIAS, "Local Group"},
 126         {SID_NAME_WKN_GRP, "Well-known Group"},
 127         {SID_NAME_DELETED, "Deleted Account"},
 128         {SID_NAME_INVALID, "Invalid Account"},
 129         {SID_NAME_UNKNOWN, "UNKNOWN"},
 130         {SID_NAME_COMPUTER, "Computer"},
 131
 132         {(enum lsa_SidType)0, NULL}
 133 };
 134
 135 const char *sid_type_lookup(uint32 sid_type)
 136 {
 137         int i = 0;
 138
 139         /* Look through list */
 140         while(sid_name_type[i].sid_type != 0) {
 141                 if (sid_name_type[i].sid_type == sid_type)
 142                         return sid_name_type[i].string;
 143                 i++;
 144         }
 145
 146         /* Default return */
 147         return "SID *TYPE* is INVALID";
 148 }
 149
 150 /**************************************************************************
 151  Create the SYSTEM token.
 152 ***************************************************************************/
 153
 154 NT_USER_TOKEN *get_system_token(void)
 155 {
 156         return &system_token;
 157 }
 158
 159 /******************************************************************
 160  get the default domain/netbios name to be used when dealing
 161  with our passdb list of accounts
 162 ******************************************************************/
 163
 164 const char *get_global_sam_name(void)
 165 {
 166         if ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role() == ROLE_DOMAIN_BDC)) {
 167                 return lp_workgroup();
 168         }
 169         return global_myname();
 170 }
 171
 172 /*****************************************************************
 173  Convert a SID to an ascii string.
 174 *****************************************************************/
 175
 176 char *sid_to_fstring(fstring sidstr_out, const DOM_SID *sid)
 177 {
 178         char *str = sid_string_talloc(talloc_tos(), sid);
 179         fstrcpy(sidstr_out, str);
 180         TALLOC_FREE(str);
 181         return sidstr_out;
 182 }
 183
 184 /*****************************************************************
 185  Essentially a renamed dom_sid_string from librpc/ndr with a
 186  panic if it didn't work
 187
 188  This introduces a dependency on librpc/ndr/sid.o which can easily
 189  be turned around if necessary
 190 *****************************************************************/
 191
 192 char *sid_string_talloc(TALLOC_CTX *mem_ctx, const DOM_SID *sid)
 193 {
 194         char *result = dom_sid_string(mem_ctx, sid);
 195         SMB_ASSERT(result != NULL);
 196         return result;
 197 }
 198
 199 /*****************************************************************
 200  Useful function for debug lines.
 201 *****************************************************************/
 202
 203 char *sid_string_dbg(const DOM_SID *sid)
 204 {
 205         return sid_string_talloc(talloc_tos(), sid);
 206 }
 207
 208 /*****************************************************************
 209  Use with care!
 210 *****************************************************************/
 211
 212 char *sid_string_tos(const DOM_SID *sid)
 213 {
 214         return sid_string_talloc(talloc_tos(), sid);
 215 }
 216
 217 /*****************************************************************
 218  Convert a string to a SID. Returns True on success, False on fail.
 219 *****************************************************************/
 220
 221 bool string_to_sid(struct dom_sid *sidout, const char *sidstr)
 222 {
 223         if (!dom_sid_parse(sidstr, sidout)) {
 224                 DEBUG(3, ("string_to_sid: Sid %s is not in a valid format.\n",
 225                           sidstr));
 226                 return false;
 227         }
 228         return true;
 229 }
 230
 231 /*****************************************************************
 232  Add a rid to the end of a sid
 233 *****************************************************************/
 234
 235 bool sid_append_rid(DOM_SID *sid, uint32 rid)
 236 {
 237         if (sid->num_auths < MAXSUBAUTHS) {
 238                 sid->sub_auths[sid->num_auths++] = rid;
 239                 return True;
 240         }
 241         return False;
 242 }
 243
 244 bool sid_compose(DOM_SID *dst, const DOM_SID *domain_sid, uint32 rid)
 245 {
 246         sid_copy(dst, domain_sid);
 247         return sid_append_rid(dst, rid);
 248 }
 249
 250 /*****************************************************************
 251  Removes the last rid from the end of a sid
 252 *****************************************************************/
 253
 254 bool sid_split_rid(DOM_SID *sid, uint32 *rid)
 255 {
 256         if (sid->num_auths > 0) {
 257                 sid->num_auths--;
 258                 *rid = sid->sub_auths[sid->num_auths];
 259                 return True;
 260         }
 261         return False;
 262 }
 263
 264 /*****************************************************************
 265  Return the last rid from the end of a sid
 266 *****************************************************************/
 267
 268 bool sid_peek_rid(const DOM_SID *sid, uint32 *rid)
 269 {
 270         if (!sid || !rid)
 271                 return False;
 272
 273         if (sid->num_auths > 0) {
 274                 *rid = sid->sub_auths[sid->num_auths - 1];
 275                 return True;
 276         }
 277         return False;
 278 }
 279
 280 /*****************************************************************
 281  Return the last rid from the end of a sid
 282  and check the sid against the exp_dom_sid
 283 *****************************************************************/
 284
 285 bool sid_peek_check_rid(const DOM_SID *exp_dom_sid, const DOM_SID *sid, uint32 *rid)
 286 {
 287         if (!exp_dom_sid || !sid || !rid)
 288                 return False;
 289
 290         if (sid->num_auths != (exp_dom_sid->num_auths+1)) {
 291                 return False;
 292         }
 293
 294         if (sid_compare_domain(exp_dom_sid, sid)!=0){
 295                 *rid=(-1);
 296                 return False;
 297         }
 298
 299         return sid_peek_rid(sid, rid);
 300 }
 301
 302 /*****************************************************************
 303  Copies a sid
 304 *****************************************************************/
 305
 306 void sid_copy(DOM_SID *dst, const DOM_SID *src)
 307 {
 308         int i;
 309
 310         ZERO_STRUCTP(dst);
 311
 312         dst->sid_rev_num = src->sid_rev_num;
 313         dst->num_auths = src->num_auths;
 314
 315         memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth));
 316
 317         for (i = 0; i < src->num_auths; i++)
 318                 dst->sub_auths[i] = src->sub_auths[i];
 319 }
 320
 321 /*****************************************************************
 322  Write a sid out into on-the-wire format.
 323 *****************************************************************/
 324
 325 bool sid_linearize(char *outbuf, size_t len, const DOM_SID *sid)
 326 {
 327         size_t i;
 328
 329         if (len < ndr_size_dom_sid(sid, NULL, 0))
 330                 return False;
 331
 332         SCVAL(outbuf,0,sid->sid_rev_num);
 333         SCVAL(outbuf,1,sid->num_auths);
 334         memcpy(&outbuf[2], sid->id_auth, 6);
 335         for(i = 0; i < sid->num_auths; i++)
 336                 SIVAL(outbuf, 8 + (i*4), sid->sub_auths[i]);
 337
 338         return True;
 339 }
 340
 341 /*****************************************************************
 342  Parse a on-the-wire SID to a DOM_SID.
 343 *****************************************************************/
 344
 345 bool sid_parse(const char *inbuf, size_t len, DOM_SID *sid)
 346 {
 347         int i;
 348         if (len < 8)
 349                 return False;
 350
 351         ZERO_STRUCTP(sid);
 352
 353         sid->sid_rev_num = CVAL(inbuf, 0);
 354         sid->num_auths = CVAL(inbuf, 1);
 355         memcpy(sid->id_auth, inbuf+2, 6);
 356         if (len < 8 + sid->num_auths*4)
 357                 return False;
 358         for (i=0;i<sid->num_auths;i++)
 359                 sid->sub_auths[i] = IVAL(inbuf, 8+i*4);
 360         return True;
 361 }
 362
 363 /*****************************************************************
 364  Compare the auth portion of two sids.
 365 *****************************************************************/
 366
 367 static int sid_compare_auth(const DOM_SID *sid1, const DOM_SID *sid2)
 368 {
 369         int i;
 370
 371         if (sid1 == sid2)
 372                 return 0;
 373         if (!sid1)
 374                 return -1;
 375         if (!sid2)
 376                 return 1;
 377
 378         if (sid1->sid_rev_num != sid2->sid_rev_num)
 379                 return sid1->sid_rev_num - sid2->sid_rev_num;
 380
 381         for (i = 0; i < 6; i++)
 382                 if (sid1->id_auth[i] != sid2->id_auth[i])
 383                         return sid1->id_auth[i] - sid2->id_auth[i];
 384
 385         return 0;
 386 }
 387
 388 /*****************************************************************
 389  Compare two sids.
 390 *****************************************************************/
 391
 392 int sid_compare(const DOM_SID *sid1, const DOM_SID *sid2)
 393 {
 394         int i;
 395
 396         if (sid1 == sid2)
 397                 return 0;
 398         if (!sid1)
 399                 return -1;
 400         if (!sid2)
 401                 return 1;
 402
 403         /* Compare most likely different rids, first: i.e start at end */
 404         if (sid1->num_auths != sid2->num_auths)
 405                 return sid1->num_auths - sid2->num_auths;
 406
 407         for (i = sid1->num_auths-1; i >= 0; --i)
 408                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
 409                         return sid1->sub_auths[i] - sid2->sub_auths[i];
 410
 411         return sid_compare_auth(sid1, sid2);
 412 }
 413
 414 /*****************************************************************
 415  See if 2 SIDs are in the same domain
 416  this just compares the leading sub-auths
 417 *****************************************************************/
 418
 419 int sid_compare_domain(const DOM_SID *sid1, const DOM_SID *sid2)
 420 {
 421         int n, i;
 422
 423         n = MIN(sid1->num_auths, sid2->num_auths);
 424
 425         for (i = n-1; i >= 0; --i)
 426                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
 427                         return sid1->sub_auths[i] - sid2->sub_auths[i];
 428
 429         return sid_compare_auth(sid1, sid2);
 430 }
 431
 432 /*****************************************************************
 433  Compare two sids.
 434 *****************************************************************/
 435
 436 bool sid_equal(const DOM_SID *sid1, const DOM_SID *sid2)
 437 {
 438         return sid_compare(sid1, sid2) == 0;
 439 }
 440
 441 /*****************************************************************
 442  Returns true if SID is internal (and non-mappable).
 443 *****************************************************************/
 444
 445 bool non_mappable_sid(DOM_SID *sid)
 446 {
 447         DOM_SID dom;
 448         uint32 rid;
 449
 450         sid_copy(&dom, sid);
 451         sid_split_rid(&dom, &rid);
 452
 453         if (sid_equal(&dom, &global_sid_Builtin))
 454                 return True;
 455
 456         if (sid_equal(&dom, &global_sid_NT_Authority))
 457                 return True;
 458
 459         return False;
 460 }
 461
 462 /*****************************************************************
 463  Return the binary string representation of a DOM_SID.
 464  Caller must free.
 465 *****************************************************************/
 466
 467 char *sid_binstring(TALLOC_CTX *mem_ctx, const DOM_SID *sid)
 468 {
 469         uint8_t *buf;
 470         char *s;
 471         int len = ndr_size_dom_sid(sid, NULL, 0);
 472         buf = talloc_array(mem_ctx, uint8_t, len);
 473         if (!buf) {
 474                 return NULL;
 475         }
 476         sid_linearize((char *)buf, len, sid);
 477         s = binary_string_rfc2254(mem_ctx, buf, len);
 478         TALLOC_FREE(buf);
 479         return s;
 480 }
 481
 482 /*****************************************************************
 483  Return the binary string representation of a DOM_SID.
 484  Caller must free.
 485 *****************************************************************/
 486
 487 char *sid_binstring_hex(const DOM_SID *sid)
 488 {
 489         char *buf, *s;
 490         int len = ndr_size_dom_sid(sid, NULL, 0);
 491         buf = (char *)SMB_MALLOC(len);
 492         if (!buf)
 493                 return NULL;
 494         sid_linearize(buf, len, sid);
 495         s = binary_string(buf, len);
 496         free(buf);
 497         return s;
 498 }
 499
 500 /*******************************************************************
 501  Tallocs a duplicate SID.
 502 ********************************************************************/
 503
 504 struct dom_sid *sid_dup_talloc(TALLOC_CTX *ctx, const struct dom_sid *src)
 505 {
 506         struct dom_sid *dst;
 507
 508         if (src == NULL) {
 509                 return NULL;
 510         }
 511         dst = talloc_zero(ctx, struct dom_sid);
 512         if (dst == NULL) {
 513                 return NULL;
 514         }
 515         sid_copy(dst, src);
 516         return dst;
 517 }
 518
 519 /********************************************************************
 520  Add SID to an array SIDs
 521 ********************************************************************/
 522
 523 NTSTATUS add_sid_to_array(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 524                           DOM_SID **sids, size_t *num)
 525 {
 526         *sids = TALLOC_REALLOC_ARRAY(mem_ctx, *sids, DOM_SID,
 527                                              (*num)+1);
 528         if (*sids == NULL) {
 529                 *num = 0;
 530                 return NT_STATUS_NO_MEMORY;
 531         }
 532
 533         sid_copy(&((*sids)[*num]), sid);
 534         *num += 1;
 535
 536         return NT_STATUS_OK;
 537 }
 538
 539
 540 /********************************************************************
 541  Add SID to an array SIDs ensuring that it is not already there
 542 ********************************************************************/
 543
 544 NTSTATUS add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 545                                  DOM_SID **sids, size_t *num_sids)
 546 {
 547         size_t i;
 548
 549         for (i=0; i<(*num_sids); i++) {
 550                 if (sid_compare(sid, &(*sids)[i]) == 0)
 551                         return NT_STATUS_OK;
 552         }
 553
 554         return add_sid_to_array(mem_ctx, sid, sids, num_sids);
 555 }
 556
 557 /********************************************************************
 558  Remove SID from an array
 559 ********************************************************************/
 560
 561 void del_sid_from_array(const DOM_SID *sid, DOM_SID **sids, size_t *num)
 562 {
 563         DOM_SID *sid_list = *sids;
 564         size_t i;
 565
 566         for ( i=0; i<*num; i++ ) {
 567
 568                 /* if we find the SID, then decrement the count
 569                    and break out of the loop */
 570
 571                 if ( sid_equal(sid, &sid_list[i]) ) {
 572                         *num -= 1;
 573                         break;
 574                 }
 575         }
 576
 577         /* This loop will copy the remainder of the array
 578            if i < num of sids ni the array */
 579
 580         for ( ; i<*num; i++ )
 581                 sid_copy( &sid_list[i], &sid_list[i+1] );
 582
 583         return;
 584 }
 585
 586 bool add_rid_to_array_unique(TALLOC_CTX *mem_ctx,
 587                                     uint32 rid, uint32 **pp_rids, size_t *p_num)
 588 {
 589         size_t i;
 590
 591         for (i=0; i<*p_num; i++) {
 592                 if ((*pp_rids)[i] == rid)
 593                         return True;
 594         }
 595
 596         *pp_rids = TALLOC_REALLOC_ARRAY(mem_ctx, *pp_rids, uint32, *p_num+1);
 597
 598         if (*pp_rids == NULL) {
 599                 *p_num = 0;
 600                 return False;
 601         }
 602
 603         (*pp_rids)[*p_num] = rid;
 604         *p_num += 1;
 605         return True;
 606 }
 607
 608 bool is_null_sid(const DOM_SID *sid)
 609 {
 610         static const DOM_SID null_sid = {0};
 611         return sid_equal(sid, &null_sid);
 612 }
 613
 614 bool is_sid_in_token(const NT_USER_TOKEN *token, const DOM_SID *sid)
 615 {
 616         int i;
 617
 618         for (i=0; i<token->num_sids; i++) {
 619                 if (sid_compare(sid, &token->user_sids[i]) == 0)
 620                         return true;
 621         }
 622         return false;
 623 }
 624
 625 NTSTATUS sid_array_from_info3(TALLOC_CTX *mem_ctx,
 626                               const struct netr_SamInfo3 *info3,
 627                               DOM_SID **user_sids,
 628                               size_t *num_user_sids,
 629                               bool include_user_group_rid,
 630                               bool skip_ressource_groups)
 631 {
 632         NTSTATUS status;
 633         DOM_SID sid;
 634         DOM_SID *sid_array = NULL;
 635         size_t num_sids = 0;
 636         int i;
 637
 638         if (include_user_group_rid) {
 639                 if (!sid_compose(&sid, info3->base.domain_sid, info3->base.rid)) {
 640                         DEBUG(3, ("could not compose user SID from rid 0x%x\n",
 641                                   info3->base.rid));
 642                         return NT_STATUS_INVALID_PARAMETER;
 643                 }
 644                 status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
 645                 if (!NT_STATUS_IS_OK(status)) {
 646                         DEBUG(3, ("could not append user SID from rid 0x%x\n",
 647                                   info3->base.rid));
 648                         return status;
 649                 }
 650         }
 651
 652         if (!sid_compose(&sid, info3->base.domain_sid, info3->base.primary_gid)) {
 653                 DEBUG(3, ("could not compose group SID from rid 0x%x\n",
 654                           info3->base.primary_gid));
 655                 return NT_STATUS_INVALID_PARAMETER;
 656         }
 657         status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
 658         if (!NT_STATUS_IS_OK(status)) {
 659                 DEBUG(3, ("could not append group SID from rid 0x%x\n",
 660                           info3->base.rid));
 661                 return status;
 662         }
 663
 664         for (i = 0; i < info3->base.groups.count; i++) {
 665                 /* Don't add the primary group sid twice. */
 666                 if (info3->base.primary_gid == info3->base.groups.rids[i].rid) {
 667                         continue;
 668                 }
 669                 if (!sid_compose(&sid, info3->base.domain_sid,
 670                                  info3->base.groups.rids[i].rid)) {
 671                         DEBUG(3, ("could not compose SID from additional group "
 672                                   "rid 0x%x\n", info3->base.groups.rids[i].rid));
 673                         return NT_STATUS_INVALID_PARAMETER;
 674                 }
 675                 status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
 676                 if (!NT_STATUS_IS_OK(status)) {
 677                         DEBUG(3, ("could not append SID from additional group "
 678                                   "rid 0x%x\n", info3->base.groups.rids[i].rid));
 679                         return status;
 680                 }
 681         }
 682
 683         /* Copy 'other' sids.  We need to do sid filtering here to
 684            prevent possible elevation of privileges.  See:
 685
 686            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 687          */
 688
 689         for (i = 0; i < info3->sidcount; i++) {
 690
 691                 if (skip_ressource_groups &&
 692                     (info3->sids[i].attributes & SE_GROUP_RESOURCE)) {
 693                         continue;
 694                 }
 695
 696                 status = add_sid_to_array(mem_ctx, info3->sids[i].sid,
 697                                       &sid_array, &num_sids);
 698                 if (!NT_STATUS_IS_OK(status)) {
 699                         DEBUG(3, ("could not add SID to array: %s\n",
 700                                   sid_string_dbg(info3->sids[i].sid)));
 701                         return status;
 702                 }
 703         }
 704
 705         *user_sids = sid_array;
 706         *num_user_sids = num_sids;
 707
 708         return NT_STATUS_OK;
 709 }