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, more well known sids can be found at
  29  * http://support.microsoft.com/kb/243330/EN-US/
  30  */
  31
  32
  33 const DOM_SID global_sid_World_Domain =               /* Everyone domain */
  34 { 1, 0, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  35 const DOM_SID global_sid_World =                      /* Everyone */
  36 { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  37 const DOM_SID global_sid_Creator_Owner_Domain =       /* Creator Owner domain */
  38 { 1, 0, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  39 const DOM_SID global_sid_NT_Authority =                 /* NT Authority */
  40 { 1, 0, {0,0,0,0,0,5}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  41 const DOM_SID global_sid_System =                       /* System */
  42 { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  43 const DOM_SID global_sid_NULL =                         /* NULL sid */
  44 { 1, 1, {0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  45 const DOM_SID global_sid_Authenticated_Users =  /* All authenticated rids */
  46 { 1, 1, {0,0,0,0,0,5}, {11,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  47 #if 0
  48 /* for documentation */
  49 const DOM_SID global_sid_Restriced =                    /* Restriced Code */
  50 { 1, 1, {0,0,0,0,0,5}, {12,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  51 #endif
  52 const DOM_SID global_sid_Network =                      /* Network rids */
  53 { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  54
  55 const DOM_SID global_sid_Creator_Owner =                /* Creator Owner */
  56 { 1, 1, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  57 const DOM_SID global_sid_Creator_Group =                /* Creator Group */
  58 { 1, 1, {0,0,0,0,0,3}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  59 const DOM_SID global_sid_Anonymous =                    /* Anonymous login */
  60 { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  61
  62 const DOM_SID global_sid_Builtin =                      /* Local well-known domain */
  63 { 1, 1, {0,0,0,0,0,5}, {32,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  64 const DOM_SID global_sid_Builtin_Administrators =       /* Builtin administrators */
  65 { 1, 2, {0,0,0,0,0,5}, {32,544,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  66 const DOM_SID global_sid_Builtin_Users =                /* Builtin users */
  67 { 1, 2, {0,0,0,0,0,5}, {32,545,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  68 const DOM_SID global_sid_Builtin_Guests =               /* Builtin guest users */
  69 { 1, 2, {0,0,0,0,0,5}, {32,546,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  70 const DOM_SID global_sid_Builtin_Power_Users =  /* Builtin power users */
  71 { 1, 2, {0,0,0,0,0,5}, {32,547,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  72 const DOM_SID global_sid_Builtin_Account_Operators =    /* Builtin account operators */
  73 { 1, 2, {0,0,0,0,0,5}, {32,548,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  74 const DOM_SID global_sid_Builtin_Server_Operators =     /* Builtin server operators */
  75 { 1, 2, {0,0,0,0,0,5}, {32,549,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  76 const DOM_SID global_sid_Builtin_Print_Operators =      /* Builtin print operators */
  77 { 1, 2, {0,0,0,0,0,5}, {32,550,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  78 const DOM_SID global_sid_Builtin_Backup_Operators =     /* Builtin backup operators */
  79 { 1, 2, {0,0,0,0,0,5}, {32,551,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  80 const DOM_SID global_sid_Builtin_Replicator =           /* Builtin replicator */
  81 { 1, 2, {0,0,0,0,0,5}, {32,552,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  82 const DOM_SID global_sid_Builtin_PreWin2kAccess =       /* Builtin pre win2k access */
  83 { 1, 2, {0,0,0,0,0,5}, {32,554,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  84
  85 const DOM_SID global_sid_Unix_Users =                   /* Unmapped Unix users */
  86 { 1, 1, {0,0,0,0,0,22}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  87 const DOM_SID global_sid_Unix_Groups =                  /* Unmapped Unix groups */
  88 { 1, 1, {0,0,0,0,0,22}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
  89
  90 /* Unused, left here for documentary purposes */
  91 #if 0
  92 #define SECURITY_NULL_SID_AUTHORITY    0
  93 #define SECURITY_WORLD_SID_AUTHORITY   1
  94 #define SECURITY_LOCAL_SID_AUTHORITY   2
  95 #define SECURITY_CREATOR_SID_AUTHORITY 3
  96 #define SECURITY_NT_AUTHORITY          5
  97 #endif
  98
  99 /*
 100  * An NT compatible anonymous token.
 101  */
 102
 103 static DOM_SID anon_sid_array[3] =
 104 { { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}},
 105   { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}},
 106   { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
 107 NT_USER_TOKEN anonymous_token = { 3, anon_sid_array, SE_NONE };
 108
 109 static DOM_SID system_sid_array[1] =
 110 { { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
 111 NT_USER_TOKEN system_token = { 1, system_sid_array, SE_ALL_PRIVS };
 112
 113 /****************************************************************************
 114  Lookup string names for SID types.
 115 ****************************************************************************/
 116
 117 static const struct {
 118         enum lsa_SidType sid_type;
 119         const char *string;
 120 } sid_name_type[] = {
 121         {SID_NAME_USER, "User"},
 122         {SID_NAME_DOM_GRP, "Domain Group"},
 123         {SID_NAME_DOMAIN, "Domain"},
 124         {SID_NAME_ALIAS, "Local Group"},
 125         {SID_NAME_WKN_GRP, "Well-known Group"},
 126         {SID_NAME_DELETED, "Deleted Account"},
 127         {SID_NAME_INVALID, "Invalid Account"},
 128         {SID_NAME_UNKNOWN, "UNKNOWN"},
 129         {SID_NAME_COMPUTER, "Computer"},
 130
 131         {(enum lsa_SidType)0, NULL}
 132 };
 133
 134 const char *sid_type_lookup(uint32 sid_type)
 135 {
 136         int i = 0;
 137
 138         /* Look through list */
 139         while(sid_name_type[i].sid_type != 0) {
 140                 if (sid_name_type[i].sid_type == sid_type)
 141                         return sid_name_type[i].string;
 142                 i++;
 143         }
 144
 145         /* Default return */
 146         return "SID *TYPE* is INVALID";
 147 }
 148
 149 /**************************************************************************
 150  Create the SYSTEM token.
 151 ***************************************************************************/
 152
 153 NT_USER_TOKEN *get_system_token(void)
 154 {
 155         return &system_token;
 156 }
 157
 158 /******************************************************************
 159  get the default domain/netbios name to be used when dealing
 160  with our passdb list of accounts
 161 ******************************************************************/
 162
 163 const char *get_global_sam_name(void)
 164 {
 165         if ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role() == ROLE_DOMAIN_BDC)) {
 166                 return lp_workgroup();
 167         }
 168         return global_myname();
 169 }
 170
 171 /*****************************************************************
 172  Convert a SID to an ascii string.
 173 *****************************************************************/
 174
 175 char *sid_to_fstring(fstring sidstr_out, const DOM_SID *sid)
 176 {
 177         char *str = sid_string_talloc(talloc_tos(), sid);
 178         fstrcpy(sidstr_out, str);
 179         TALLOC_FREE(str);
 180         return sidstr_out;
 181 }
 182
 183 /*****************************************************************
 184  Essentially a renamed dom_sid_string from librpc/ndr with a
 185  panic if it didn't work
 186
 187  This introduces a dependency on librpc/ndr/sid.o which can easily
 188  be turned around if necessary
 189 *****************************************************************/
 190
 191 char *sid_string_talloc(TALLOC_CTX *mem_ctx, const DOM_SID *sid)
 192 {
 193         char *result = dom_sid_string(mem_ctx, sid);
 194         SMB_ASSERT(result != NULL);
 195         return result;
 196 }
 197
 198 /*****************************************************************
 199  Useful function for debug lines.
 200 *****************************************************************/
 201
 202 char *sid_string_dbg(const DOM_SID *sid)
 203 {
 204         return sid_string_talloc(talloc_tos(), sid);
 205 }
 206
 207 /*****************************************************************
 208  Use with care!
 209 *****************************************************************/
 210
 211 char *sid_string_tos(const DOM_SID *sid)
 212 {
 213         return sid_string_talloc(talloc_tos(), sid);
 214 }
 215
 216 /*****************************************************************
 217  Convert a string to a SID. Returns True on success, False on fail.
 218 *****************************************************************/
 219
 220 bool string_to_sid(DOM_SID *sidout, const char *sidstr)
 221 {
 222         const char *p;
 223         char *q;
 224         /* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 */
 225         uint32 conv;
 226
 227         if ((sidstr[0] != 'S' && sidstr[0] != 's') || sidstr[1] != '-') {
 228                 goto format_error;
 229         }
 230
 231         ZERO_STRUCTP(sidout);
 232
 233         /* Get the revision number. */
 234         p = sidstr + 2;
 235
 236         if (!isdigit(*p)) {
 237                 goto format_error;
 238         }
 239
 240         conv = (uint32) strtoul(p, &q, 10);
 241         if (!q || (*q != '-')) {
 242                 goto format_error;
 243         }
 244         sidout->sid_rev_num = (uint8) conv;
 245         q++;
 246
 247         if (!isdigit(*q)) {
 248                 goto format_error;
 249         }
 250
 251         /* get identauth */
 252         conv = (uint32) strtoul(q, &q, 10);
 253         if (!q || (*q != '-')) {
 254                 goto format_error;
 255         }
 256         /* identauth in decimal should be <  2^32 */
 257         /* NOTE - the conv value is in big-endian format. */
 258         sidout->id_auth[0] = 0;
 259         sidout->id_auth[1] = 0;
 260         sidout->id_auth[2] = (conv & 0xff000000) >> 24;
 261         sidout->id_auth[3] = (conv & 0x00ff0000) >> 16;
 262         sidout->id_auth[4] = (conv & 0x0000ff00) >> 8;
 263         sidout->id_auth[5] = (conv & 0x000000ff);
 264
 265         q++;
 266         sidout->num_auths = 0;
 267
 268         while (true) {
 269                 char *end;
 270
 271                 if (!isdigit(*q)) {
 272                         goto format_error;
 273                 }
 274
 275                 conv = strtoul(q, &end, 10);
 276                 if (end == q) {
 277                         goto format_error;
 278                 }
 279
 280                 if (!sid_append_rid(sidout, conv)) {
 281                         DEBUG(3, ("Too many sid auths in %s\n", sidstr));
 282                         return false;
 283                 }
 284
 285                 q = end;
 286                 if (*q == '\0') {
 287                         break;
 288                 }
 289                 if (*q != '-') {
 290                         goto format_error;
 291                 }
 292                 q += 1;
 293         }
 294         return true;
 295
 296 format_error:
 297         DEBUG(3, ("string_to_sid: SID %s is not in a valid format\n", sidstr));
 298         return false;
 299 }
 300
 301 /*****************************************************************
 302  Add a rid to the end of a sid
 303 *****************************************************************/
 304
 305 bool sid_append_rid(DOM_SID *sid, uint32 rid)
 306 {
 307         if (sid->num_auths < MAXSUBAUTHS) {
 308                 sid->sub_auths[sid->num_auths++] = rid;
 309                 return True;
 310         }
 311         return False;
 312 }
 313
 314 bool sid_compose(DOM_SID *dst, const DOM_SID *domain_sid, uint32 rid)
 315 {
 316         sid_copy(dst, domain_sid);
 317         return sid_append_rid(dst, rid);
 318 }
 319
 320 /*****************************************************************
 321  Removes the last rid from the end of a sid
 322 *****************************************************************/
 323
 324 bool sid_split_rid(DOM_SID *sid, uint32 *rid)
 325 {
 326         if (sid->num_auths > 0) {
 327                 sid->num_auths--;
 328                 *rid = sid->sub_auths[sid->num_auths];
 329                 return True;
 330         }
 331         return False;
 332 }
 333
 334 /*****************************************************************
 335  Return the last rid from the end of a sid
 336 *****************************************************************/
 337
 338 bool sid_peek_rid(const DOM_SID *sid, uint32 *rid)
 339 {
 340         if (!sid || !rid)
 341                 return False;
 342
 343         if (sid->num_auths > 0) {
 344                 *rid = sid->sub_auths[sid->num_auths - 1];
 345                 return True;
 346         }
 347         return False;
 348 }
 349
 350 /*****************************************************************
 351  Return the last rid from the end of a sid
 352  and check the sid against the exp_dom_sid
 353 *****************************************************************/
 354
 355 bool sid_peek_check_rid(const DOM_SID *exp_dom_sid, const DOM_SID *sid, uint32 *rid)
 356 {
 357         if (!exp_dom_sid || !sid || !rid)
 358                 return False;
 359
 360         if (sid->num_auths != (exp_dom_sid->num_auths+1)) {
 361                 return False;
 362         }
 363
 364         if (sid_compare_domain(exp_dom_sid, sid)!=0){
 365                 *rid=(-1);
 366                 return False;
 367         }
 368
 369         return sid_peek_rid(sid, rid);
 370 }
 371
 372 /*****************************************************************
 373  Copies a sid
 374 *****************************************************************/
 375
 376 void sid_copy(DOM_SID *dst, const DOM_SID *src)
 377 {
 378         int i;
 379
 380         ZERO_STRUCTP(dst);
 381
 382         dst->sid_rev_num = src->sid_rev_num;
 383         dst->num_auths = src->num_auths;
 384
 385         memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth));
 386
 387         for (i = 0; i < src->num_auths; i++)
 388                 dst->sub_auths[i] = src->sub_auths[i];
 389 }
 390
 391 /*****************************************************************
 392  Write a sid out into on-the-wire format.
 393 *****************************************************************/
 394
 395 bool sid_linearize(char *outbuf, size_t len, const DOM_SID *sid)
 396 {
 397         size_t i;
 398
 399         if (len < ndr_size_dom_sid(sid, NULL, 0))
 400                 return False;
 401
 402         SCVAL(outbuf,0,sid->sid_rev_num);
 403         SCVAL(outbuf,1,sid->num_auths);
 404         memcpy(&outbuf[2], sid->id_auth, 6);
 405         for(i = 0; i < sid->num_auths; i++)
 406                 SIVAL(outbuf, 8 + (i*4), sid->sub_auths[i]);
 407
 408         return True;
 409 }
 410
 411 /*****************************************************************
 412  Parse a on-the-wire SID to a DOM_SID.
 413 *****************************************************************/
 414
 415 bool sid_parse(const char *inbuf, size_t len, DOM_SID *sid)
 416 {
 417         int i;
 418         if (len < 8)
 419                 return False;
 420
 421         ZERO_STRUCTP(sid);
 422
 423         sid->sid_rev_num = CVAL(inbuf, 0);
 424         sid->num_auths = CVAL(inbuf, 1);
 425         memcpy(sid->id_auth, inbuf+2, 6);
 426         if (len < 8 + sid->num_auths*4)
 427                 return False;
 428         for (i=0;i<sid->num_auths;i++)
 429                 sid->sub_auths[i] = IVAL(inbuf, 8+i*4);
 430         return True;
 431 }
 432
 433 /*****************************************************************
 434  Compare the auth portion of two sids.
 435 *****************************************************************/
 436
 437 static int sid_compare_auth(const DOM_SID *sid1, const DOM_SID *sid2)
 438 {
 439         int i;
 440
 441         if (sid1 == sid2)
 442                 return 0;
 443         if (!sid1)
 444                 return -1;
 445         if (!sid2)
 446                 return 1;
 447
 448         if (sid1->sid_rev_num != sid2->sid_rev_num)
 449                 return sid1->sid_rev_num - sid2->sid_rev_num;
 450
 451         for (i = 0; i < 6; i++)
 452                 if (sid1->id_auth[i] != sid2->id_auth[i])
 453                         return sid1->id_auth[i] - sid2->id_auth[i];
 454
 455         return 0;
 456 }
 457
 458 /*****************************************************************
 459  Compare two sids.
 460 *****************************************************************/
 461
 462 int sid_compare(const DOM_SID *sid1, const DOM_SID *sid2)
 463 {
 464         int i;
 465
 466         if (sid1 == sid2)
 467                 return 0;
 468         if (!sid1)
 469                 return -1;
 470         if (!sid2)
 471                 return 1;
 472
 473         /* Compare most likely different rids, first: i.e start at end */
 474         if (sid1->num_auths != sid2->num_auths)
 475                 return sid1->num_auths - sid2->num_auths;
 476
 477         for (i = sid1->num_auths-1; i >= 0; --i)
 478                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
 479                         return sid1->sub_auths[i] - sid2->sub_auths[i];
 480
 481         return sid_compare_auth(sid1, sid2);
 482 }
 483
 484 /*****************************************************************
 485  See if 2 SIDs are in the same domain
 486  this just compares the leading sub-auths
 487 *****************************************************************/
 488
 489 int sid_compare_domain(const DOM_SID *sid1, const DOM_SID *sid2)
 490 {
 491         int n, i;
 492
 493         n = MIN(sid1->num_auths, sid2->num_auths);
 494
 495         for (i = n-1; i >= 0; --i)
 496                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
 497                         return sid1->sub_auths[i] - sid2->sub_auths[i];
 498
 499         return sid_compare_auth(sid1, sid2);
 500 }
 501
 502 /*****************************************************************
 503  Compare two sids.
 504 *****************************************************************/
 505
 506 bool sid_equal(const DOM_SID *sid1, const DOM_SID *sid2)
 507 {
 508         return sid_compare(sid1, sid2) == 0;
 509 }
 510
 511 /*****************************************************************
 512  Returns true if SID is internal (and non-mappable).
 513 *****************************************************************/
 514
 515 bool non_mappable_sid(DOM_SID *sid)
 516 {
 517         DOM_SID dom;
 518         uint32 rid;
 519
 520         sid_copy(&dom, sid);
 521         sid_split_rid(&dom, &rid);
 522
 523         if (sid_equal(&dom, &global_sid_Builtin))
 524                 return True;
 525
 526         if (sid_equal(&dom, &global_sid_NT_Authority))
 527                 return True;
 528
 529         return False;
 530 }
 531
 532 /*****************************************************************
 533  Return the binary string representation of a DOM_SID.
 534  Caller must free.
 535 *****************************************************************/
 536
 537 char *sid_binstring(TALLOC_CTX *mem_ctx, const DOM_SID *sid)
 538 {
 539         uint8_t *buf;
 540         char *s;
 541         int len = ndr_size_dom_sid(sid, NULL, 0);
 542         buf = talloc_array(mem_ctx, uint8_t, len);
 543         if (!buf) {
 544                 return NULL;
 545         }
 546         sid_linearize((char *)buf, len, sid);
 547         s = binary_string_rfc2254(mem_ctx, buf, len);
 548         TALLOC_FREE(buf);
 549         return s;
 550 }
 551
 552 /*****************************************************************
 553  Return the binary string representation of a DOM_SID.
 554  Caller must free.
 555 *****************************************************************/
 556
 557 char *sid_binstring_hex(const DOM_SID *sid)
 558 {
 559         char *buf, *s;
 560         int len = ndr_size_dom_sid(sid, NULL, 0);
 561         buf = (char *)SMB_MALLOC(len);
 562         if (!buf)
 563                 return NULL;
 564         sid_linearize(buf, len, sid);
 565         s = binary_string(buf, len);
 566         free(buf);
 567         return s;
 568 }
 569
 570 /*******************************************************************
 571  Tallocs a duplicate SID.
 572 ********************************************************************/
 573
 574 struct dom_sid *sid_dup_talloc(TALLOC_CTX *ctx, const struct dom_sid *src)
 575 {
 576         struct dom_sid *dst;
 577
 578         if (src == NULL) {
 579                 return NULL;
 580         }
 581         dst = talloc_zero(ctx, struct dom_sid);
 582         if (dst == NULL) {
 583                 return NULL;
 584         }
 585         sid_copy(dst, src);
 586         return dst;
 587 }
 588
 589 /********************************************************************
 590  Add SID to an array SIDs
 591 ********************************************************************/
 592
 593 NTSTATUS add_sid_to_array(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 594                           DOM_SID **sids, size_t *num)
 595 {
 596         *sids = TALLOC_REALLOC_ARRAY(mem_ctx, *sids, DOM_SID,
 597                                              (*num)+1);
 598         if (*sids == NULL) {
 599                 *num = 0;
 600                 return NT_STATUS_NO_MEMORY;
 601         }
 602
 603         sid_copy(&((*sids)[*num]), sid);
 604         *num += 1;
 605
 606         return NT_STATUS_OK;
 607 }
 608
 609
 610 /********************************************************************
 611  Add SID to an array SIDs ensuring that it is not already there
 612 ********************************************************************/
 613
 614 NTSTATUS add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 615                                  DOM_SID **sids, size_t *num_sids)
 616 {
 617         size_t i;
 618
 619         for (i=0; i<(*num_sids); i++) {
 620                 if (sid_compare(sid, &(*sids)[i]) == 0)
 621                         return NT_STATUS_OK;
 622         }
 623
 624         return add_sid_to_array(mem_ctx, sid, sids, num_sids);
 625 }
 626
 627 /********************************************************************
 628  Remove SID from an array
 629 ********************************************************************/
 630
 631 void del_sid_from_array(const DOM_SID *sid, DOM_SID **sids, size_t *num)
 632 {
 633         DOM_SID *sid_list = *sids;
 634         size_t i;
 635
 636         for ( i=0; i<*num; i++ ) {
 637
 638                 /* if we find the SID, then decrement the count
 639                    and break out of the loop */
 640
 641                 if ( sid_equal(sid, &sid_list[i]) ) {
 642                         *num -= 1;
 643                         break;
 644                 }
 645         }
 646
 647         /* This loop will copy the remainder of the array
 648            if i < num of sids ni the array */
 649
 650         for ( ; i<*num; i++ )
 651                 sid_copy( &sid_list[i], &sid_list[i+1] );
 652
 653         return;
 654 }
 655
 656 bool add_rid_to_array_unique(TALLOC_CTX *mem_ctx,
 657                                     uint32 rid, uint32 **pp_rids, size_t *p_num)
 658 {
 659         size_t i;
 660
 661         for (i=0; i<*p_num; i++) {
 662                 if ((*pp_rids)[i] == rid)
 663                         return True;
 664         }
 665
 666         *pp_rids = TALLOC_REALLOC_ARRAY(mem_ctx, *pp_rids, uint32, *p_num+1);
 667
 668         if (*pp_rids == NULL) {
 669                 *p_num = 0;
 670                 return False;
 671         }
 672
 673         (*pp_rids)[*p_num] = rid;
 674         *p_num += 1;
 675         return True;
 676 }
 677
 678 bool is_null_sid(const DOM_SID *sid)
 679 {
 680         static const DOM_SID null_sid = {0};
 681         return sid_equal(sid, &null_sid);
 682 }
 683
 684 bool is_sid_in_token(const NT_USER_TOKEN *token, const DOM_SID *sid)
 685 {
 686         int i;
 687
 688         for (i=0; i<token->num_sids; i++) {
 689                 if (sid_compare(sid, &token->user_sids[i]) == 0)
 690                         return true;
 691         }
 692         return false;
 693 }
 694
 695 NTSTATUS sid_array_from_info3(TALLOC_CTX *mem_ctx,
 696                               const struct netr_SamInfo3 *info3,
 697                               DOM_SID **user_sids,
 698                               size_t *num_user_sids,
 699                               bool include_user_group_rid,
 700                               bool skip_ressource_groups)
 701 {
 702         NTSTATUS status;
 703         DOM_SID sid;
 704         DOM_SID *sid_array = NULL;
 705         size_t num_sids = 0;
 706         int i;
 707
 708         if (include_user_group_rid) {
 709                 if (!sid_compose(&sid, info3->base.domain_sid, info3->base.rid)) {
 710                         DEBUG(3, ("could not compose user SID from rid 0x%x\n",
 711                                   info3->base.rid));
 712                         return NT_STATUS_INVALID_PARAMETER;
 713                 }
 714                 status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
 715                 if (!NT_STATUS_IS_OK(status)) {
 716                         DEBUG(3, ("could not append user SID from rid 0x%x\n",
 717                                   info3->base.rid));
 718                         return status;
 719                 }
 720         }
 721
 722         if (!sid_compose(&sid, info3->base.domain_sid, info3->base.primary_gid)) {
 723                 DEBUG(3, ("could not compose group SID from rid 0x%x\n",
 724                           info3->base.primary_gid));
 725                 return NT_STATUS_INVALID_PARAMETER;
 726         }
 727         status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
 728         if (!NT_STATUS_IS_OK(status)) {
 729                 DEBUG(3, ("could not append group SID from rid 0x%x\n",
 730                           info3->base.rid));
 731                 return status;
 732         }
 733
 734         for (i = 0; i < info3->base.groups.count; i++) {
 735                 /* Don't add the primary group sid twice. */
 736                 if (info3->base.primary_gid == info3->base.groups.rids[i].rid) {
 737                         continue;
 738                 }
 739                 if (!sid_compose(&sid, info3->base.domain_sid,
 740                                  info3->base.groups.rids[i].rid)) {
 741                         DEBUG(3, ("could not compose SID from additional group "
 742                                   "rid 0x%x\n", info3->base.groups.rids[i].rid));
 743                         return NT_STATUS_INVALID_PARAMETER;
 744                 }
 745                 status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
 746                 if (!NT_STATUS_IS_OK(status)) {
 747                         DEBUG(3, ("could not append SID from additional group "
 748                                   "rid 0x%x\n", info3->base.groups.rids[i].rid));
 749                         return status;
 750                 }
 751         }
 752
 753         /* Copy 'other' sids.  We need to do sid filtering here to
 754            prevent possible elevation of privileges.  See:
 755
 756            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 757          */
 758
 759         for (i = 0; i < info3->sidcount; i++) {
 760
 761                 if (skip_ressource_groups &&
 762                     (info3->sids[i].attributes & SE_GROUP_RESOURCE)) {
 763                         continue;
 764                 }
 765
 766                 status = add_sid_to_array(mem_ctx, info3->sids[i].sid,
 767                                       &sid_array, &num_sids);
 768                 if (!NT_STATUS_IS_OK(status)) {
 769                         DEBUG(3, ("could not add SID to array: %s\n",
 770                                   sid_string_dbg(info3->sids[i].sid)));
 771                         return status;
 772                 }
 773         }
 774
 775         *user_sids = sid_array;
 776         *num_user_sids = num_sids;
 777
 778         return NT_STATUS_OK;
 779 }