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
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  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
  77 #define SECURITY_NULL_SID_AUTHORITY    0
  78 #define SECURITY_WORLD_SID_AUTHORITY   1
  79 #define SECURITY_LOCAL_SID_AUTHORITY   2
  80 #define SECURITY_CREATOR_SID_AUTHORITY 3
  81 #define SECURITY_NT_AUTHORITY          5
  82
  83 /*
  84  * An NT compatible anonymous token.
  85  */
  86
  87 static DOM_SID anon_sid_array[3] =
  88 { { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}},
  89   { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}},
  90   { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
  91 NT_USER_TOKEN anonymous_token = { 3, anon_sid_array, SE_NONE };
  92
  93 static DOM_SID system_sid_array[1] =
  94 { { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
  95 NT_USER_TOKEN system_token = { 1, system_sid_array, SE_ALL_PRIVS };
  96
  97 /****************************************************************************
  98  Lookup string names for SID types.
  99 ****************************************************************************/
 100
 101 static const struct {
 102         enum SID_NAME_USE sid_type;
 103         const char *string;
 104 } sid_name_type[] = {
 105         {SID_NAME_USER, "User"},
 106         {SID_NAME_DOM_GRP, "Domain Group"},
 107         {SID_NAME_DOMAIN, "Domain"},
 108         {SID_NAME_ALIAS, "Local Group"},
 109         {SID_NAME_WKN_GRP, "Well-known Group"},
 110         {SID_NAME_DELETED, "Deleted Account"},
 111         {SID_NAME_INVALID, "Invalid Account"},
 112         {SID_NAME_UNKNOWN, "UNKNOWN"},
 113         {SID_NAME_COMPUTER, "Computer"},
 114
 115         {(enum SID_NAME_USE)0, NULL}
 116 };
 117
 118 const char *sid_type_lookup(uint32 sid_type)
 119 {
 120         int i = 0;
 121
 122         /* Look through list */
 123         while(sid_name_type[i].sid_type != 0) {
 124                 if (sid_name_type[i].sid_type == sid_type)
 125                         return sid_name_type[i].string;
 126                 i++;
 127         }
 128
 129         /* Default return */
 130         return "SID *TYPE* is INVALID";
 131 }
 132
 133 /**************************************************************************
 134  Create the SYSTEM token.
 135 ***************************************************************************/
 136
 137 NT_USER_TOKEN *get_system_token(void)
 138 {
 139         return &system_token;
 140 }
 141
 142 /******************************************************************
 143  get the default domain/netbios name to be used when dealing
 144  with our passdb list of accounts
 145 ******************************************************************/
 146
 147 const char *get_global_sam_name(void)
 148 {
 149         if ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role() == ROLE_DOMAIN_BDC)) {
 150                 return lp_workgroup();
 151         }
 152         return global_myname();
 153 }
 154
 155 /**************************************************************************
 156  Splits a name of format \DOMAIN\name or name into its two components.
 157  Sets the DOMAIN name to global_myname() if it has not been specified.
 158 ***************************************************************************/
 159
 160 void split_domain_name(const char *fullname, char *domain, char *name)
 161 {
 162         pstring full_name;
 163         const char *sep;
 164         char *p;
 165
 166         sep = lp_winbind_separator();
 167
 168         *domain = *name = '\0';
 169
 170         if (fullname[0] == sep[0] || fullname[0] == '\\')
 171                 fullname++;
 172
 173         pstrcpy(full_name, fullname);
 174         p = strchr_m(full_name+1, '\\');
 175         if (!p) p = strchr_m(full_name+1, sep[0]);
 176
 177         if (p != NULL) {
 178                 *p = 0;
 179                 fstrcpy(domain, full_name);
 180                 fstrcpy(name, p+1);
 181         } else {
 182                 fstrcpy(domain, get_global_sam_name());
 183                 fstrcpy(name, full_name);
 184         }
 185
 186         DEBUG(10,("split_domain_name:name '%s' split into domain :'%s' and user :'%s'\n",
 187                         fullname, domain, name));
 188 }
 189
 190 /****************************************************************************
 191  Test if a SID is wellknown and resolvable.
 192 ****************************************************************************/
 193
 194 BOOL resolvable_wellknown_sid(DOM_SID *sid)
 195 {
 196         uint32 ia = (sid->id_auth[5]) +
 197                         (sid->id_auth[4] << 8 ) +
 198                         (sid->id_auth[3] << 16) +
 199                         (sid->id_auth[2] << 24);
 200
 201         if (sid->sid_rev_num != SEC_DESC_REVISION || sid->num_auths < 1)
 202                 return False;
 203
 204         return (ia == SECURITY_WORLD_SID_AUTHORITY ||
 205                 ia == SECURITY_CREATOR_SID_AUTHORITY);
 206 }
 207
 208 /*****************************************************************
 209  Convert a SID to an ascii string.
 210 *****************************************************************/
 211
 212 char *sid_to_string(fstring sidstr_out, const DOM_SID *sid)
 213 {
 214         char subauth[16];
 215         int i;
 216         uint32 ia;
 217
 218         if (!sid) {
 219                 fstrcpy(sidstr_out, "(NULL SID)");
 220                 return sidstr_out;
 221         }
 222
 223         /*
 224          * BIG NOTE: this function only does SIDS where the identauth is not >= 2^32
 225          * in a range of 2^48.
 226          */
 227         ia = (sid->id_auth[5]) +
 228                 (sid->id_auth[4] << 8 ) +
 229                 (sid->id_auth[3] << 16) +
 230                 (sid->id_auth[2] << 24);
 231
 232         slprintf(sidstr_out, sizeof(fstring) - 1, "S-%u-%lu", (unsigned int)sid->sid_rev_num, (unsigned long)ia);
 233
 234         for (i = 0; i < sid->num_auths; i++) {
 235                 slprintf(subauth, sizeof(subauth)-1, "-%lu", (unsigned long)sid->sub_auths[i]);
 236                 fstrcat(sidstr_out, subauth);
 237         }
 238
 239         return sidstr_out;
 240 }
 241
 242 /*****************************************************************
 243  Useful function for debug lines.
 244 *****************************************************************/
 245
 246 const char *sid_string_static(const DOM_SID *sid)
 247 {
 248         static fstring sid_str;
 249         sid_to_string(sid_str, sid);
 250         return sid_str;
 251 }
 252
 253 /*****************************************************************
 254  Convert a string to a SID. Returns True on success, False on fail.
 255 *****************************************************************/
 256
 257 BOOL string_to_sid(DOM_SID *sidout, const char *sidstr)
 258 {
 259         pstring tok;
 260         char *q;
 261         const char *p;
 262         /* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 */
 263         uint32 ia;
 264
 265         if (StrnCaseCmp( sidstr, "S-", 2)) {
 266                 DEBUG(0,("string_to_sid: Sid %s does not start with 'S-'.\n", sidstr));
 267                 return False;
 268         }
 269
 270         memset((char *)sidout, '\0', sizeof(DOM_SID));
 271
 272         p = q = SMB_STRDUP(sidstr + 2);
 273         if (p == NULL) {
 274                 DEBUG(0, ("string_to_sid: out of memory!\n"));
 275                 return False;
 276         }
 277
 278         if (!next_token(&p, tok, "-", sizeof(tok))) {
 279                 DEBUG(0,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
 280                 SAFE_FREE(q);
 281                 return False;
 282         }
 283
 284         /* Get the revision number. */
 285         sidout->sid_rev_num = (uint8)strtoul(tok, NULL, 10);
 286
 287         if (!next_token(&p, tok, "-", sizeof(tok))) {
 288                 DEBUG(0,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
 289                 SAFE_FREE(q);
 290                 return False;
 291         }
 292
 293         /* identauth in decimal should be <  2^32 */
 294         ia = (uint32)strtoul(tok, NULL, 10);
 295
 296         /* NOTE - the ia value is in big-endian format. */
 297         sidout->id_auth[0] = 0;
 298         sidout->id_auth[1] = 0;
 299         sidout->id_auth[2] = (ia & 0xff000000) >> 24;
 300         sidout->id_auth[3] = (ia & 0x00ff0000) >> 16;
 301         sidout->id_auth[4] = (ia & 0x0000ff00) >> 8;
 302         sidout->id_auth[5] = (ia & 0x000000ff);
 303
 304         sidout->num_auths = 0;
 305
 306         while(next_token(&p, tok, "-", sizeof(tok)) &&
 307                 sidout->num_auths < MAXSUBAUTHS) {
 308                 /*
 309                  * NOTE - the subauths are in native machine-endian format. They
 310                  * are converted to little-endian when linearized onto the wire.
 311                  */
 312                 sid_append_rid(sidout, (uint32)strtoul(tok, NULL, 10));
 313         }
 314
 315         SAFE_FREE(q);
 316         return True;
 317 }
 318
 319 DOM_SID *string_sid_talloc(TALLOC_CTX *mem_ctx, const char *sidstr)
 320 {
 321         DOM_SID *result = TALLOC_P(mem_ctx, DOM_SID);
 322
 323         if (result == NULL)
 324                 return NULL;
 325
 326         if (!string_to_sid(result, sidstr))
 327                 return NULL;
 328
 329         return result;
 330 }
 331
 332 /*****************************************************************
 333  Add a rid to the end of a sid
 334 *****************************************************************/
 335
 336 BOOL sid_append_rid(DOM_SID *sid, uint32 rid)
 337 {
 338         if (sid->num_auths < MAXSUBAUTHS) {
 339                 sid->sub_auths[sid->num_auths++] = rid;
 340                 return True;
 341         }
 342         return False;
 343 }
 344
 345 BOOL sid_compose(DOM_SID *dst, const DOM_SID *domain_sid, uint32 rid)
 346 {
 347         sid_copy(dst, domain_sid);
 348         return sid_append_rid(dst, rid);
 349 }
 350
 351 /*****************************************************************
 352  Removes the last rid from the end of a sid
 353 *****************************************************************/
 354
 355 BOOL sid_split_rid(DOM_SID *sid, uint32 *rid)
 356 {
 357         if (sid->num_auths > 0) {
 358                 sid->num_auths--;
 359                 *rid = sid->sub_auths[sid->num_auths];
 360                 return True;
 361         }
 362         return False;
 363 }
 364
 365 /*****************************************************************
 366  Return the last rid from the end of a sid
 367 *****************************************************************/
 368
 369 BOOL sid_peek_rid(const DOM_SID *sid, uint32 *rid)
 370 {
 371         if (!sid || !rid)
 372                 return False;
 373
 374         if (sid->num_auths > 0) {
 375                 *rid = sid->sub_auths[sid->num_auths - 1];
 376                 return True;
 377         }
 378         return False;
 379 }
 380
 381 /*****************************************************************
 382  Return the last rid from the end of a sid
 383  and check the sid against the exp_dom_sid
 384 *****************************************************************/
 385
 386 BOOL sid_peek_check_rid(const DOM_SID *exp_dom_sid, const DOM_SID *sid, uint32 *rid)
 387 {
 388         if (!exp_dom_sid || !sid || !rid)
 389                 return False;
 390
 391         if (sid->num_auths != (exp_dom_sid->num_auths+1)) {
 392                 return False;
 393         }
 394
 395         if (sid_compare_domain(exp_dom_sid, sid)!=0){
 396                 *rid=(-1);
 397                 return False;
 398         }
 399
 400         return sid_peek_rid(sid, rid);
 401 }
 402
 403 /*****************************************************************
 404  Copies a sid
 405 *****************************************************************/
 406
 407 void sid_copy(DOM_SID *dst, const DOM_SID *src)
 408 {
 409         int i;
 410
 411         ZERO_STRUCTP(dst);
 412
 413         dst->sid_rev_num = src->sid_rev_num;
 414         dst->num_auths = src->num_auths;
 415
 416         memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth));
 417
 418         for (i = 0; i < src->num_auths; i++)
 419                 dst->sub_auths[i] = src->sub_auths[i];
 420 }
 421
 422 /*****************************************************************
 423  Write a sid out into on-the-wire format.
 424 *****************************************************************/
 425
 426 BOOL sid_linearize(char *outbuf, size_t len, const DOM_SID *sid)
 427 {
 428         size_t i;
 429
 430         if (len < sid_size(sid))
 431                 return False;
 432
 433         SCVAL(outbuf,0,sid->sid_rev_num);
 434         SCVAL(outbuf,1,sid->num_auths);
 435         memcpy(&outbuf[2], sid->id_auth, 6);
 436         for(i = 0; i < sid->num_auths; i++)
 437                 SIVAL(outbuf, 8 + (i*4), sid->sub_auths[i]);
 438
 439         return True;
 440 }
 441
 442 /*****************************************************************
 443  Parse a on-the-wire SID to a DOM_SID.
 444 *****************************************************************/
 445
 446 BOOL sid_parse(const char *inbuf, size_t len, DOM_SID *sid)
 447 {
 448         int i;
 449         if (len < 8)
 450                 return False;
 451
 452         ZERO_STRUCTP(sid);
 453
 454         sid->sid_rev_num = CVAL(inbuf, 0);
 455         sid->num_auths = CVAL(inbuf, 1);
 456         memcpy(sid->id_auth, inbuf+2, 6);
 457         if (len < 8 + sid->num_auths*4)
 458                 return False;
 459         for (i=0;i<sid->num_auths;i++)
 460                 sid->sub_auths[i] = IVAL(inbuf, 8+i*4);
 461         return True;
 462 }
 463
 464 /*****************************************************************
 465  Compare the auth portion of two sids.
 466 *****************************************************************/
 467
 468 static int sid_compare_auth(const DOM_SID *sid1, const DOM_SID *sid2)
 469 {
 470         int i;
 471
 472         if (sid1 == sid2)
 473                 return 0;
 474         if (!sid1)
 475                 return -1;
 476         if (!sid2)
 477                 return 1;
 478
 479         if (sid1->sid_rev_num != sid2->sid_rev_num)
 480                 return sid1->sid_rev_num - sid2->sid_rev_num;
 481
 482         for (i = 0; i < 6; i++)
 483                 if (sid1->id_auth[i] != sid2->id_auth[i])
 484                         return sid1->id_auth[i] - sid2->id_auth[i];
 485
 486         return 0;
 487 }
 488
 489 /*****************************************************************
 490  Compare two sids.
 491 *****************************************************************/
 492
 493 int sid_compare(const DOM_SID *sid1, const DOM_SID *sid2)
 494 {
 495         int i;
 496
 497         if (sid1 == sid2)
 498                 return 0;
 499         if (!sid1)
 500                 return -1;
 501         if (!sid2)
 502                 return 1;
 503
 504         /* Compare most likely different rids, first: i.e start at end */
 505         if (sid1->num_auths != sid2->num_auths)
 506                 return sid1->num_auths - sid2->num_auths;
 507
 508         for (i = sid1->num_auths-1; i >= 0; --i)
 509                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
 510                         return sid1->sub_auths[i] - sid2->sub_auths[i];
 511
 512         return sid_compare_auth(sid1, sid2);
 513 }
 514
 515 /*****************************************************************
 516  See if 2 SIDs are in the same domain
 517  this just compares the leading sub-auths
 518 *****************************************************************/
 519
 520 int sid_compare_domain(const DOM_SID *sid1, const DOM_SID *sid2)
 521 {
 522         int n, i;
 523
 524         n = MIN(sid1->num_auths, sid2->num_auths);
 525
 526         for (i = n-1; i >= 0; --i)
 527                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
 528                         return sid1->sub_auths[i] - sid2->sub_auths[i];
 529
 530         return sid_compare_auth(sid1, sid2);
 531 }
 532
 533 /*****************************************************************
 534  Compare two sids.
 535 *****************************************************************/
 536
 537 BOOL sid_equal(const DOM_SID *sid1, const DOM_SID *sid2)
 538 {
 539         return sid_compare(sid1, sid2) == 0;
 540 }
 541
 542 /*****************************************************************
 543  Check if the SID is the builtin SID (S-1-5-32).
 544 *****************************************************************/
 545
 546 BOOL sid_check_is_builtin(const DOM_SID *sid)
 547 {
 548         return sid_equal(sid, &global_sid_Builtin);
 549 }
 550
 551 /*****************************************************************
 552  Check if the SID is one of the builtin SIDs (S-1-5-32-a).
 553 *****************************************************************/
 554
 555 BOOL sid_check_is_in_builtin(const DOM_SID *sid)
 556 {
 557         DOM_SID dom_sid;
 558         uint32 rid;
 559
 560         sid_copy(&dom_sid, sid);
 561         sid_split_rid(&dom_sid, &rid);
 562
 563         return sid_equal(&dom_sid, &global_sid_Builtin);
 564 }
 565
 566 /*****************************************************************
 567  Calculates size of a sid.
 568 *****************************************************************/
 569
 570 size_t sid_size(const DOM_SID *sid)
 571 {
 572         if (sid == NULL)
 573                 return 0;
 574
 575         return sid->num_auths * sizeof(uint32) + 8;
 576 }
 577
 578 /*****************************************************************
 579  Returns true if SID is internal (and non-mappable).
 580 *****************************************************************/
 581
 582 BOOL non_mappable_sid(DOM_SID *sid)
 583 {
 584         DOM_SID dom;
 585         uint32 rid;
 586
 587         sid_copy(&dom, sid);
 588         sid_split_rid(&dom, &rid);
 589
 590         if (sid_equal(&dom, &global_sid_Builtin))
 591                 return True;
 592
 593         if (sid_equal(&dom, &global_sid_NT_Authority))
 594                 return True;
 595
 596         return False;
 597 }
 598
 599 /*****************************************************************
 600  Return the binary string representation of a DOM_SID.
 601  Caller must free.
 602 *****************************************************************/
 603
 604 char *sid_binstring(const DOM_SID *sid)
 605 {
 606         char *buf, *s;
 607         int len = sid_size(sid);
 608         buf = SMB_MALLOC(len);
 609         if (!buf)
 610                 return NULL;
 611         sid_linearize(buf, len, sid);
 612         s = binary_string(buf, len);
 613         free(buf);
 614         return s;
 615 }
 616
 617 /*******************************************************************
 618  Tallocs a duplicate SID.
 619 ********************************************************************/
 620
 621 DOM_SID *sid_dup_talloc(TALLOC_CTX *ctx, const DOM_SID *src)
 622 {
 623         DOM_SID *dst;
 624
 625         if(!src)
 626                 return NULL;
 627
 628         if((dst = TALLOC_ZERO_P(ctx, DOM_SID)) != NULL) {
 629                 sid_copy( dst, src);
 630         }
 631
 632         return dst;
 633 }
 634
 635 /********************************************************************
 636  Add SID to an array SIDs
 637 ********************************************************************/
 638
 639 void add_sid_to_array(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 640                       DOM_SID **sids, int *num)
 641 {
 642         if (mem_ctx != NULL)
 643                 *sids = TALLOC_REALLOC_ARRAY(mem_ctx, *sids, DOM_SID,
 644                                              (*num)+1);
 645         else
 646                 *sids = SMB_REALLOC_ARRAY(*sids, DOM_SID, (*num)+1);
 647
 648         if (*sids == NULL)
 649                 return;
 650
 651         sid_copy(&((*sids)[*num]), sid);
 652         *num += 1;
 653
 654         return;
 655 }
 656
 657
 658 /********************************************************************
 659  Add SID to an array SIDs ensuring that it is not already there
 660 ********************************************************************/
 661
 662 void add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 663                              DOM_SID **sids, int *num_sids)
 664 {
 665         int i;
 666
 667         for (i=0; i<(*num_sids); i++) {
 668                 if (sid_compare(sid, &(*sids)[i]) == 0)
 669                         return;
 670         }
 671
 672         add_sid_to_array(mem_ctx, sid, sids, num_sids);
 673 }
 674
 675 /********************************************************************
 676  Remove SID from an array
 677 ********************************************************************/
 678
 679 void del_sid_from_array(const DOM_SID *sid, DOM_SID **sids, int *num)
 680 {
 681         DOM_SID *sid_list = *sids;
 682         int i;
 683
 684         for ( i=0; i<*num; i++ ) {
 685
 686                 /* if we find the SID, then decrement the count
 687                    and break out of the loop */
 688
 689                 if ( sid_equal(sid, &sid_list[i]) ) {
 690                         *num -= 1;
 691                         break;
 692                 }
 693         }
 694
 695         /* This loop will copy the remainder of the array
 696            if i < num of sids ni the array */
 697
 698         for ( ; i<*num; i++ )
 699                 sid_copy( &sid_list[i], &sid_list[i+1] );
 700
 701         return;
 702 }
 703