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
  27 /*
  28  * Some useful sids
  29  */
  30
  31
  32 const DOM_SID global_sid_World_Domain =               /* Everyone domain */
  33 { 1, 0, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  34 const DOM_SID global_sid_World =                      /* Everyone */
  35 { 1, 1, {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_Creator_Owner_Domain =       /* Creator Owner domain */
  37 { 1, 0, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  38 const DOM_SID global_sid_NT_Authority =                 /* NT Authority */
  39 { 1, 0, {0,0,0,0,0,5}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  40 const DOM_SID global_sid_System =                       /* System */
  41 { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  42 const DOM_SID global_sid_NULL =                         /* NULL sid */
  43 { 1, 1, {0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  44 const DOM_SID global_sid_Authenticated_Users =  /* All authenticated rids */
  45 { 1, 1, {0,0,0,0,0,5}, {11,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  46 const DOM_SID global_sid_Network =                      /* Network rids */
  47 { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  48
  49 const DOM_SID global_sid_Creator_Owner =                /* Creator Owner */
  50 { 1, 1, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  51 const DOM_SID global_sid_Creator_Group =                /* Creator Group */
  52 { 1, 1, {0,0,0,0,0,3}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  53 const DOM_SID global_sid_Anonymous =                    /* Anonymous login */
  54 { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  55
  56 const DOM_SID global_sid_Builtin =                      /* Local well-known domain */
  57 { 1, 1, {0,0,0,0,0,5}, {32,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  58 const DOM_SID global_sid_Builtin_Administrators =       /* Builtin administrators */
  59 { 1, 2, {0,0,0,0,0,5}, {32,544,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  60 const DOM_SID global_sid_Builtin_Users =                /* Builtin users */
  61 { 1, 2, {0,0,0,0,0,5}, {32,545,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  62 const DOM_SID global_sid_Builtin_Guests =               /* Builtin guest users */
  63 { 1, 2, {0,0,0,0,0,5}, {32,546,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  64 const DOM_SID global_sid_Builtin_Power_Users =  /* Builtin power users */
  65 { 1, 2, {0,0,0,0,0,5}, {32,547,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  66 const DOM_SID global_sid_Builtin_Account_Operators =    /* Builtin account operators */
  67 { 1, 2, {0,0,0,0,0,5}, {32,548,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  68 const DOM_SID global_sid_Builtin_Server_Operators =     /* Builtin server operators */
  69 { 1, 2, {0,0,0,0,0,5}, {32,549,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  70 const DOM_SID global_sid_Builtin_Print_Operators =      /* Builtin print operators */
  71 { 1, 2, {0,0,0,0,0,5}, {32,550,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  72 const DOM_SID global_sid_Builtin_Backup_Operators =     /* Builtin backup operators */
  73 { 1, 2, {0,0,0,0,0,5}, {32,551,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  74 const DOM_SID global_sid_Builtin_Replicator =           /* Builtin replicator */
  75 { 1, 2, {0,0,0,0,0,5}, {32,552,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  76 const DOM_SID global_sid_Builtin_PreWin2kAccess =       /* Builtin pre win2k access */
  77 { 1, 2, {0,0,0,0,0,5}, {32,554,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  78
  79 const DOM_SID global_sid_Unix_Users =                   /* Unmapped Unix users */
  80 { 1, 1, {0,0,0,0,0,22}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  81 const DOM_SID global_sid_Unix_Groups =                  /* Unmapped Unix groups */
  82 { 1, 1, {0,0,0,0,0,22}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  83
  84 /* Unused, left here for documentary purposes */
  85 #if 0
  86 #define SECURITY_NULL_SID_AUTHORITY    0
  87 #define SECURITY_WORLD_SID_AUTHORITY   1
  88 #define SECURITY_LOCAL_SID_AUTHORITY   2
  89 #define SECURITY_CREATOR_SID_AUTHORITY 3
  90 #define SECURITY_NT_AUTHORITY          5
  91 #endif
  92
  93 /*
  94  * An NT compatible anonymous token.
  95  */
  96
  97 static DOM_SID anon_sid_array[3] =
  98 { { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}},
  99   { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}},
 100   { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
 101 NT_USER_TOKEN anonymous_token = { 3, anon_sid_array, SE_NONE };
 102
 103 static DOM_SID system_sid_array[1] =
 104 { { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
 105 NT_USER_TOKEN system_token = { 1, system_sid_array, SE_ALL_PRIVS };
 106
 107 /****************************************************************************
 108  Lookup string names for SID types.
 109 ****************************************************************************/
 110
 111 static const struct {
 112         enum lsa_SidType sid_type;
 113         const char *string;
 114 } sid_name_type[] = {
 115         {SID_NAME_USER, "User"},
 116         {SID_NAME_DOM_GRP, "Domain Group"},
 117         {SID_NAME_DOMAIN, "Domain"},
 118         {SID_NAME_ALIAS, "Local Group"},
 119         {SID_NAME_WKN_GRP, "Well-known Group"},
 120         {SID_NAME_DELETED, "Deleted Account"},
 121         {SID_NAME_INVALID, "Invalid Account"},
 122         {SID_NAME_UNKNOWN, "UNKNOWN"},
 123         {SID_NAME_COMPUTER, "Computer"},
 124
 125         {(enum lsa_SidType)0, NULL}
 126 };
 127
 128 const char *sid_type_lookup(uint32 sid_type)
 129 {
 130         int i = 0;
 131
 132         /* Look through list */
 133         while(sid_name_type[i].sid_type != 0) {
 134                 if (sid_name_type[i].sid_type == sid_type)
 135                         return sid_name_type[i].string;
 136                 i++;
 137         }
 138
 139         /* Default return */
 140         return "SID *TYPE* is INVALID";
 141 }
 142
 143 /**************************************************************************
 144  Create the SYSTEM token.
 145 ***************************************************************************/
 146
 147 NT_USER_TOKEN *get_system_token(void)
 148 {
 149         return &system_token;
 150 }
 151
 152 /******************************************************************
 153  get the default domain/netbios name to be used when dealing
 154  with our passdb list of accounts
 155 ******************************************************************/
 156
 157 const char *get_global_sam_name(void)
 158 {
 159         if ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role() == ROLE_DOMAIN_BDC)) {
 160                 return lp_workgroup();
 161         }
 162         return global_myname();
 163 }
 164
 165 /*****************************************************************
 166  Convert a SID to an ascii string.
 167 *****************************************************************/
 168
 169 char *sid_to_string(fstring sidstr_out, const DOM_SID *sid)
 170 {
 171         char subauth[16];
 172         int i;
 173         uint32 ia;
 174
 175         if (!sid) {
 176                 fstrcpy(sidstr_out, "(NULL SID)");
 177                 return sidstr_out;
 178         }
 179
 180         /*
 181          * BIG NOTE: this function only does SIDS where the identauth is not >= 2^32
 182          * in a range of 2^48.
 183          */
 184         ia = (sid->id_auth[5]) +
 185                 (sid->id_auth[4] << 8 ) +
 186                 (sid->id_auth[3] << 16) +
 187                 (sid->id_auth[2] << 24);
 188
 189         slprintf(sidstr_out, sizeof(fstring) - 1, "S-%u-%lu", (unsigned int)sid->sid_rev_num, (unsigned long)ia);
 190
 191         for (i = 0; i < sid->num_auths; i++) {
 192                 slprintf(subauth, sizeof(subauth)-1, "-%lu", (unsigned long)sid->sub_auths[i]);
 193                 fstrcat(sidstr_out, subauth);
 194         }
 195
 196         return sidstr_out;
 197 }
 198
 199 /*****************************************************************
 200  Useful function for debug lines.
 201 *****************************************************************/
 202
 203 const char *sid_string_static(const DOM_SID *sid)
 204 {
 205         static fstring sid_str;
 206         sid_to_string(sid_str, sid);
 207         return sid_str;
 208 }
 209
 210 /*****************************************************************
 211  Convert a string to a SID. Returns True on success, False on fail.
 212 *****************************************************************/
 213
 214 BOOL string_to_sid(DOM_SID *sidout, const char *sidstr)
 215 {
 216         const char *p;
 217         char *q;
 218         /* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 */
 219         uint32 conv;
 220
 221         if ((sidstr[0] != 'S' && sidstr[0] != 's') || sidstr[1] != '-') {
 222                 DEBUG(3,("string_to_sid: Sid %s does not start with 'S-'.\n", sidstr));
 223                 return False;
 224         }
 225
 226         ZERO_STRUCTP(sidout);
 227
 228         /* Get the revision number. */
 229         p = sidstr + 2;
 230         conv = (uint32) strtoul(p, &q, 10);
 231         if (!q || (*q != '-')) {
 232                 DEBUG(3,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
 233                 return False;
 234         }
 235         sidout->sid_rev_num = (uint8) conv;
 236         q++;
 237
 238         /* get identauth */
 239         conv = (uint32) strtoul(q, &q, 10);
 240         if (!q || (*q != '-')) {
 241                 DEBUG(0,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
 242                 return False;
 243         }
 244         /* identauth in decimal should be <  2^32 */
 245         /* NOTE - the conv value is in big-endian format. */
 246         sidout->id_auth[0] = 0;
 247         sidout->id_auth[1] = 0;
 248         sidout->id_auth[2] = (conv & 0xff000000) >> 24;
 249         sidout->id_auth[3] = (conv & 0x00ff0000) >> 16;
 250         sidout->id_auth[4] = (conv & 0x0000ff00) >> 8;
 251         sidout->id_auth[5] = (conv & 0x000000ff);
 252
 253         q++;
 254         sidout->num_auths = 0;
 255
 256         for(conv = (uint32) strtoul(q, &q, 10);
 257             q && (*q =='-' || *q =='\0') && (sidout->num_auths < MAXSUBAUTHS);
 258             conv = (uint32) strtoul(q, &q, 10)) {
 259                 sid_append_rid(sidout, conv);
 260                 if (*q == '\0')
 261                         break;
 262                 q++;
 263         }
 264
 265         return True;
 266 }
 267
 268 DOM_SID *string_sid_talloc(TALLOC_CTX *mem_ctx, const char *sidstr)
 269 {
 270         DOM_SID *result = TALLOC_P(mem_ctx, DOM_SID);
 271
 272         if (result == NULL)
 273                 return NULL;
 274
 275         if (!string_to_sid(result, sidstr))
 276                 return NULL;
 277
 278         return result;
 279 }
 280
 281 /*****************************************************************
 282  Add a rid to the end of a sid
 283 *****************************************************************/
 284
 285 BOOL sid_append_rid(DOM_SID *sid, uint32 rid)
 286 {
 287         if (sid->num_auths < MAXSUBAUTHS) {
 288                 sid->sub_auths[sid->num_auths++] = rid;
 289                 return True;
 290         }
 291         return False;
 292 }
 293
 294 BOOL sid_compose(DOM_SID *dst, const DOM_SID *domain_sid, uint32 rid)
 295 {
 296         sid_copy(dst, domain_sid);
 297         return sid_append_rid(dst, rid);
 298 }
 299
 300 /*****************************************************************
 301  Removes the last rid from the end of a sid
 302 *****************************************************************/
 303
 304 BOOL sid_split_rid(DOM_SID *sid, uint32 *rid)
 305 {
 306         if (sid->num_auths > 0) {
 307                 sid->num_auths--;
 308                 *rid = sid->sub_auths[sid->num_auths];
 309                 return True;
 310         }
 311         return False;
 312 }
 313
 314 /*****************************************************************
 315  Return the last rid from the end of a sid
 316 *****************************************************************/
 317
 318 BOOL sid_peek_rid(const DOM_SID *sid, uint32 *rid)
 319 {
 320         if (!sid || !rid)
 321                 return False;
 322
 323         if (sid->num_auths > 0) {
 324                 *rid = sid->sub_auths[sid->num_auths - 1];
 325                 return True;
 326         }
 327         return False;
 328 }
 329
 330 /*****************************************************************
 331  Return the last rid from the end of a sid
 332  and check the sid against the exp_dom_sid
 333 *****************************************************************/
 334
 335 BOOL sid_peek_check_rid(const DOM_SID *exp_dom_sid, const DOM_SID *sid, uint32 *rid)
 336 {
 337         if (!exp_dom_sid || !sid || !rid)
 338                 return False;
 339
 340         if (sid->num_auths != (exp_dom_sid->num_auths+1)) {
 341                 return False;
 342         }
 343
 344         if (sid_compare_domain(exp_dom_sid, sid)!=0){
 345                 *rid=(-1);
 346                 return False;
 347         }
 348
 349         return sid_peek_rid(sid, rid);
 350 }
 351
 352 /*****************************************************************
 353  Copies a sid
 354 *****************************************************************/
 355
 356 void sid_copy(DOM_SID *dst, const DOM_SID *src)
 357 {
 358         int i;
 359
 360         ZERO_STRUCTP(dst);
 361
 362         dst->sid_rev_num = src->sid_rev_num;
 363         dst->num_auths = src->num_auths;
 364
 365         memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth));
 366
 367         for (i = 0; i < src->num_auths; i++)
 368                 dst->sub_auths[i] = src->sub_auths[i];
 369 }
 370
 371 /*****************************************************************
 372  Write a sid out into on-the-wire format.
 373 *****************************************************************/
 374
 375 BOOL sid_linearize(char *outbuf, size_t len, const DOM_SID *sid)
 376 {
 377         size_t i;
 378
 379         if (len < sid_size(sid))
 380                 return False;
 381
 382         SCVAL(outbuf,0,sid->sid_rev_num);
 383         SCVAL(outbuf,1,sid->num_auths);
 384         memcpy(&outbuf[2], sid->id_auth, 6);
 385         for(i = 0; i < sid->num_auths; i++)
 386                 SIVAL(outbuf, 8 + (i*4), sid->sub_auths[i]);
 387
 388         return True;
 389 }
 390
 391 /*****************************************************************
 392  Parse a on-the-wire SID to a DOM_SID.
 393 *****************************************************************/
 394
 395 BOOL sid_parse(const char *inbuf, size_t len, DOM_SID *sid)
 396 {
 397         int i;
 398         if (len < 8)
 399                 return False;
 400
 401         ZERO_STRUCTP(sid);
 402
 403         sid->sid_rev_num = CVAL(inbuf, 0);
 404         sid->num_auths = CVAL(inbuf, 1);
 405         memcpy(sid->id_auth, inbuf+2, 6);
 406         if (len < 8 + sid->num_auths*4)
 407                 return False;
 408         for (i=0;i<sid->num_auths;i++)
 409                 sid->sub_auths[i] = IVAL(inbuf, 8+i*4);
 410         return True;
 411 }
 412
 413 /*****************************************************************
 414  Compare the auth portion of two sids.
 415 *****************************************************************/
 416
 417 static int sid_compare_auth(const DOM_SID *sid1, const DOM_SID *sid2)
 418 {
 419         int i;
 420
 421         if (sid1 == sid2)
 422                 return 0;
 423         if (!sid1)
 424                 return -1;
 425         if (!sid2)
 426                 return 1;
 427
 428         if (sid1->sid_rev_num != sid2->sid_rev_num)
 429                 return sid1->sid_rev_num - sid2->sid_rev_num;
 430
 431         for (i = 0; i < 6; i++)
 432                 if (sid1->id_auth[i] != sid2->id_auth[i])
 433                         return sid1->id_auth[i] - sid2->id_auth[i];
 434
 435         return 0;
 436 }
 437
 438 /*****************************************************************
 439  Compare two sids.
 440 *****************************************************************/
 441
 442 int sid_compare(const DOM_SID *sid1, const DOM_SID *sid2)
 443 {
 444         int i;
 445
 446         if (sid1 == sid2)
 447                 return 0;
 448         if (!sid1)
 449                 return -1;
 450         if (!sid2)
 451                 return 1;
 452
 453         /* Compare most likely different rids, first: i.e start at end */
 454         if (sid1->num_auths != sid2->num_auths)
 455                 return sid1->num_auths - sid2->num_auths;
 456
 457         for (i = sid1->num_auths-1; i >= 0; --i)
 458                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
 459                         return sid1->sub_auths[i] - sid2->sub_auths[i];
 460
 461         return sid_compare_auth(sid1, sid2);
 462 }
 463
 464 /*****************************************************************
 465  See if 2 SIDs are in the same domain
 466  this just compares the leading sub-auths
 467 *****************************************************************/
 468
 469 int sid_compare_domain(const DOM_SID *sid1, const DOM_SID *sid2)
 470 {
 471         int n, i;
 472
 473         n = MIN(sid1->num_auths, sid2->num_auths);
 474
 475         for (i = n-1; i >= 0; --i)
 476                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
 477                         return sid1->sub_auths[i] - sid2->sub_auths[i];
 478
 479         return sid_compare_auth(sid1, sid2);
 480 }
 481
 482 /*****************************************************************
 483  Compare two sids.
 484 *****************************************************************/
 485
 486 BOOL sid_equal(const DOM_SID *sid1, const DOM_SID *sid2)
 487 {
 488         return sid_compare(sid1, sid2) == 0;
 489 }
 490
 491 /*****************************************************************
 492  Calculates size of a sid.
 493 *****************************************************************/
 494
 495 size_t sid_size(const DOM_SID *sid)
 496 {
 497         if (sid == NULL)
 498                 return 0;
 499
 500         return sid->num_auths * sizeof(uint32) + 8;
 501 }
 502
 503 /*****************************************************************
 504  Returns true if SID is internal (and non-mappable).
 505 *****************************************************************/
 506
 507 BOOL non_mappable_sid(DOM_SID *sid)
 508 {
 509         DOM_SID dom;
 510         uint32 rid;
 511
 512         sid_copy(&dom, sid);
 513         sid_split_rid(&dom, &rid);
 514
 515         if (sid_equal(&dom, &global_sid_Builtin))
 516                 return True;
 517
 518         if (sid_equal(&dom, &global_sid_NT_Authority))
 519                 return True;
 520
 521         return False;
 522 }
 523
 524 /*****************************************************************
 525  Return the binary string representation of a DOM_SID.
 526  Caller must free.
 527 *****************************************************************/
 528
 529 char *sid_binstring(const DOM_SID *sid)
 530 {
 531         char *buf, *s;
 532         int len = sid_size(sid);
 533         buf = (char *)SMB_MALLOC(len);
 534         if (!buf)
 535                 return NULL;
 536         sid_linearize(buf, len, sid);
 537         s = binary_string_rfc2254(buf, len);
 538         free(buf);
 539         return s;
 540 }
 541
 542 /*****************************************************************
 543  Return the binary string representation of a DOM_SID.
 544  Caller must free.
 545 *****************************************************************/
 546
 547 char *sid_binstring_hex(const DOM_SID *sid)
 548 {
 549         char *buf, *s;
 550         int len = sid_size(sid);
 551         buf = (char *)SMB_MALLOC(len);
 552         if (!buf)
 553                 return NULL;
 554         sid_linearize(buf, len, sid);
 555         s = binary_string(buf, len);
 556         free(buf);
 557         return s;
 558 }
 559
 560 /*******************************************************************
 561  Tallocs a duplicate SID.
 562 ********************************************************************/
 563
 564 DOM_SID *sid_dup_talloc(TALLOC_CTX *ctx, const DOM_SID *src)
 565 {
 566         DOM_SID *dst;
 567
 568         if(!src)
 569                 return NULL;
 570
 571         if((dst = TALLOC_ZERO_P(ctx, DOM_SID)) != NULL) {
 572                 sid_copy( dst, src);
 573         }
 574
 575         return dst;
 576 }
 577
 578 /********************************************************************
 579  Add SID to an array SIDs
 580 ********************************************************************/
 581
 582 BOOL add_sid_to_array(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 583                       DOM_SID **sids, size_t *num)
 584 {
 585         *sids = TALLOC_REALLOC_ARRAY(mem_ctx, *sids, DOM_SID,
 586                                              (*num)+1);
 587         if (*sids == NULL) {
 588                 *num = 0;
 589                 return False;
 590         }
 591
 592         sid_copy(&((*sids)[*num]), sid);
 593         *num += 1;
 594
 595         return True;
 596 }
 597
 598
 599 /********************************************************************
 600  Add SID to an array SIDs ensuring that it is not already there
 601 ********************************************************************/
 602
 603 BOOL add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 604                              DOM_SID **sids, size_t *num_sids)
 605 {
 606         size_t i;
 607
 608         for (i=0; i<(*num_sids); i++) {
 609                 if (sid_compare(sid, &(*sids)[i]) == 0)
 610                         return True;
 611         }
 612
 613         return add_sid_to_array(mem_ctx, sid, sids, num_sids);
 614 }
 615
 616 /********************************************************************
 617  Remove SID from an array
 618 ********************************************************************/
 619
 620 void del_sid_from_array(const DOM_SID *sid, DOM_SID **sids, size_t *num)
 621 {
 622         DOM_SID *sid_list = *sids;
 623         size_t i;
 624
 625         for ( i=0; i<*num; i++ ) {
 626
 627                 /* if we find the SID, then decrement the count
 628                    and break out of the loop */
 629
 630                 if ( sid_equal(sid, &sid_list[i]) ) {
 631                         *num -= 1;
 632                         break;
 633                 }
 634         }
 635
 636         /* This loop will copy the remainder of the array
 637            if i < num of sids ni the array */
 638
 639         for ( ; i<*num; i++ )
 640                 sid_copy( &sid_list[i], &sid_list[i+1] );
 641
 642         return;
 643 }
 644
 645 BOOL add_rid_to_array_unique(TALLOC_CTX *mem_ctx,
 646                                     uint32 rid, uint32 **pp_rids, size_t *p_num)
 647 {
 648         size_t i;
 649
 650         for (i=0; i<*p_num; i++) {
 651                 if ((*pp_rids)[i] == rid)
 652                         return True;
 653         }
 654
 655         *pp_rids = TALLOC_REALLOC_ARRAY(mem_ctx, *pp_rids, uint32, *p_num+1);
 656
 657         if (*pp_rids == NULL) {
 658                 *p_num = 0;
 659                 return False;
 660         }
 661
 662         (*pp_rids)[*p_num] = rid;
 663         *p_num += 1;
 664         return True;
 665 }
 666
 667 BOOL is_null_sid(const DOM_SID *sid)
 668 {
 669         static const DOM_SID null_sid = {0};
 670         return sid_equal(sid, &null_sid);
 671 }
 672
 673 NTSTATUS sid_array_from_info3(TALLOC_CTX *mem_ctx,
 674                               const NET_USER_INFO_3 *info3,
 675                               DOM_SID **user_sids,
 676                               size_t *num_user_sids,
 677                               BOOL include_user_group_rid)
 678 {
 679         DOM_SID sid;
 680         DOM_SID *sid_array = NULL;
 681         size_t num_sids = 0;
 682         int i;
 683
 684         if (include_user_group_rid) {
 685
 686                 if (!sid_compose(&sid, &(info3->dom_sid.sid),
 687                                  info3->user_rid)
 688                     || !add_sid_to_array(mem_ctx, &sid,
 689                                          &sid_array, &num_sids)) {
 690                         DEBUG(3,("could not add user SID from rid 0x%x\n",
 691                                  info3->user_rid));
 692                         return NT_STATUS_INVALID_PARAMETER;
 693                 }
 694
 695                 if (!sid_compose(&sid, &(info3->dom_sid.sid),
 696                                  info3->group_rid)
 697                     || !add_sid_to_array(mem_ctx, &sid,
 698                                          &sid_array, &num_sids)) {
 699                         DEBUG(3,("could not append additional group rid 0x%x\n",
 700                                  info3->group_rid));
 701
 702                         return NT_STATUS_INVALID_PARAMETER;
 703                 }
 704         }
 705
 706         for (i = 0; i < info3->num_groups2; i++) {
 707                 if (!sid_compose(&sid, &(info3->dom_sid.sid),
 708                                  info3->gids[i].g_rid)
 709                     || !add_sid_to_array(mem_ctx, &sid,
 710                                          &sid_array, &num_sids)) {
 711                         DEBUG(3,("could not append additional group rid 0x%x\n",
 712                                  info3->gids[i].g_rid));
 713                         return NT_STATUS_INVALID_PARAMETER;
 714                 }
 715         }
 716
 717         /* Copy 'other' sids.  We need to do sid filtering here to
 718            prevent possible elevation of privileges.  See:
 719
 720            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 721          */
 722
 723         for (i = 0; i < info3->num_other_sids; i++) {
 724                 if (!add_sid_to_array(mem_ctx, &info3->other_sids[i].sid,
 725                                       &sid_array, &num_sids)) {
 726                         DEBUG(3, ("could not add SID to array: %s\n",
 727                                   sid_string_static(&info3->other_sids[i].sid)));
 728                         return NT_STATUS_NO_MEMORY;
 729                 }
 730         }
 731
 732         *user_sids = sid_array;
 733         *num_user_sids = num_sids;
 734
 735         return NT_STATUS_OK;
 736 }