source/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_string(fstring sidstr_out, const DOM_SID *sid)
 176 {
 177         char subauth[16];
 178         int i;
 179         uint32 ia;
 180
 181         if (!sid) {
 182                 fstrcpy(sidstr_out, "(NULL SID)");
 183                 return sidstr_out;
 184         }
 185
 186         /*
 187          * BIG NOTE: this function only does SIDS where the identauth is not >= 2^32
 188          * in a range of 2^48.
 189          */
 190         ia = (sid->id_auth[5]) +
 191                 (sid->id_auth[4] << 8 ) +
 192                 (sid->id_auth[3] << 16) +
 193                 (sid->id_auth[2] << 24);
 194
 195         slprintf(sidstr_out, sizeof(fstring) - 1, "S-%u-%lu", (unsigned int)sid->sid_rev_num, (unsigned long)ia);
 196
 197         for (i = 0; i < sid->num_auths; i++) {
 198                 slprintf(subauth, sizeof(subauth)-1, "-%lu", (unsigned long)sid->sub_auths[i]);
 199                 fstrcat(sidstr_out, subauth);
 200         }
 201
 202         return sidstr_out;
 203 }
 204
 205 /*****************************************************************
 206  Useful function for debug lines.
 207 *****************************************************************/
 208
 209 const char *sid_string_static(const DOM_SID *sid)
 210 {
 211         static fstring sid_str;
 212         sid_to_string(sid_str, sid);
 213         return sid_str;
 214 }
 215
 216 char *sid_string_tos(const DOM_SID *sid)
 217 {
 218         fstring sid_str;
 219         sid_to_string(sid_str, sid);
 220         return talloc_strdup(talloc_tos(), sid_str);
 221 }
 222
 223 /*****************************************************************
 224  Convert a string to a SID. Returns True on success, False on fail.
 225 *****************************************************************/
 226
 227 BOOL string_to_sid(DOM_SID *sidout, const char *sidstr)
 228 {
 229         const char *p;
 230         char *q;
 231         /* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 */
 232         uint32 conv;
 233
 234         if ((sidstr[0] != 'S' && sidstr[0] != 's') || sidstr[1] != '-') {
 235                 DEBUG(3,("string_to_sid: Sid %s does not start with 'S-'.\n", sidstr));
 236                 return False;
 237         }
 238
 239         ZERO_STRUCTP(sidout);
 240
 241         /* Get the revision number. */
 242         p = sidstr + 2;
 243         conv = (uint32) strtoul(p, &q, 10);
 244         if (!q || (*q != '-')) {
 245                 DEBUG(3,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
 246                 return False;
 247         }
 248         sidout->sid_rev_num = (uint8) conv;
 249         q++;
 250
 251         /* get identauth */
 252         conv = (uint32) strtoul(q, &q, 10);
 253         if (!q || (*q != '-')) {
 254                 DEBUG(0,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
 255                 return False;
 256         }
 257         /* identauth in decimal should be <  2^32 */
 258         /* NOTE - the conv value is in big-endian format. */
 259         sidout->id_auth[0] = 0;
 260         sidout->id_auth[1] = 0;
 261         sidout->id_auth[2] = (conv & 0xff000000) >> 24;
 262         sidout->id_auth[3] = (conv & 0x00ff0000) >> 16;
 263         sidout->id_auth[4] = (conv & 0x0000ff00) >> 8;
 264         sidout->id_auth[5] = (conv & 0x000000ff);
 265
 266         q++;
 267         sidout->num_auths = 0;
 268
 269         for(conv = (uint32) strtoul(q, &q, 10);
 270             q && (*q =='-' || *q =='\0') && (sidout->num_auths < MAXSUBAUTHS);
 271             conv = (uint32) strtoul(q, &q, 10)) {
 272                 sid_append_rid(sidout, conv);
 273                 if (*q == '\0')
 274                         break;
 275                 q++;
 276         }
 277
 278         return True;
 279 }
 280
 281 DOM_SID *string_sid_talloc(TALLOC_CTX *mem_ctx, const char *sidstr)
 282 {
 283         DOM_SID *result = TALLOC_P(mem_ctx, DOM_SID);
 284
 285         if (result == NULL)
 286                 return NULL;
 287
 288         if (!string_to_sid(result, sidstr))
 289                 return NULL;
 290
 291         return result;
 292 }
 293
 294 /*****************************************************************
 295  Add a rid to the end of a sid
 296 *****************************************************************/
 297
 298 BOOL sid_append_rid(DOM_SID *sid, uint32 rid)
 299 {
 300         if (sid->num_auths < MAXSUBAUTHS) {
 301                 sid->sub_auths[sid->num_auths++] = rid;
 302                 return True;
 303         }
 304         return False;
 305 }
 306
 307 BOOL sid_compose(DOM_SID *dst, const DOM_SID *domain_sid, uint32 rid)
 308 {
 309         sid_copy(dst, domain_sid);
 310         return sid_append_rid(dst, rid);
 311 }
 312
 313 /*****************************************************************
 314  Removes the last rid from the end of a sid
 315 *****************************************************************/
 316
 317 BOOL sid_split_rid(DOM_SID *sid, uint32 *rid)
 318 {
 319         if (sid->num_auths > 0) {
 320                 sid->num_auths--;
 321                 *rid = sid->sub_auths[sid->num_auths];
 322                 return True;
 323         }
 324         return False;
 325 }
 326
 327 /*****************************************************************
 328  Return the last rid from the end of a sid
 329 *****************************************************************/
 330
 331 BOOL sid_peek_rid(const DOM_SID *sid, uint32 *rid)
 332 {
 333         if (!sid || !rid)
 334                 return False;
 335
 336         if (sid->num_auths > 0) {
 337                 *rid = sid->sub_auths[sid->num_auths - 1];
 338                 return True;
 339         }
 340         return False;
 341 }
 342
 343 /*****************************************************************
 344  Return the last rid from the end of a sid
 345  and check the sid against the exp_dom_sid
 346 *****************************************************************/
 347
 348 BOOL sid_peek_check_rid(const DOM_SID *exp_dom_sid, const DOM_SID *sid, uint32 *rid)
 349 {
 350         if (!exp_dom_sid || !sid || !rid)
 351                 return False;
 352
 353         if (sid->num_auths != (exp_dom_sid->num_auths+1)) {
 354                 return False;
 355         }
 356
 357         if (sid_compare_domain(exp_dom_sid, sid)!=0){
 358                 *rid=(-1);
 359                 return False;
 360         }
 361
 362         return sid_peek_rid(sid, rid);
 363 }
 364
 365 /*****************************************************************
 366  Copies a sid
 367 *****************************************************************/
 368
 369 void sid_copy(DOM_SID *dst, const DOM_SID *src)
 370 {
 371         int i;
 372
 373         ZERO_STRUCTP(dst);
 374
 375         dst->sid_rev_num = src->sid_rev_num;
 376         dst->num_auths = src->num_auths;
 377
 378         memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth));
 379
 380         for (i = 0; i < src->num_auths; i++)
 381                 dst->sub_auths[i] = src->sub_auths[i];
 382 }
 383
 384 /*****************************************************************
 385  Write a sid out into on-the-wire format.
 386 *****************************************************************/
 387
 388 BOOL sid_linearize(char *outbuf, size_t len, const DOM_SID *sid)
 389 {
 390         size_t i;
 391
 392         if (len < sid_size(sid))
 393                 return False;
 394
 395         SCVAL(outbuf,0,sid->sid_rev_num);
 396         SCVAL(outbuf,1,sid->num_auths);
 397         memcpy(&outbuf[2], sid->id_auth, 6);
 398         for(i = 0; i < sid->num_auths; i++)
 399                 SIVAL(outbuf, 8 + (i*4), sid->sub_auths[i]);
 400
 401         return True;
 402 }
 403
 404 /*****************************************************************
 405  Parse a on-the-wire SID to a DOM_SID.
 406 *****************************************************************/
 407
 408 BOOL sid_parse(const char *inbuf, size_t len, DOM_SID *sid)
 409 {
 410         int i;
 411         if (len < 8)
 412                 return False;
 413
 414         ZERO_STRUCTP(sid);
 415
 416         sid->sid_rev_num = CVAL(inbuf, 0);
 417         sid->num_auths = CVAL(inbuf, 1);
 418         memcpy(sid->id_auth, inbuf+2, 6);
 419         if (len < 8 + sid->num_auths*4)
 420                 return False;
 421         for (i=0;i<sid->num_auths;i++)
 422                 sid->sub_auths[i] = IVAL(inbuf, 8+i*4);
 423         return True;
 424 }
 425
 426 /*****************************************************************
 427  Compare the auth portion of two sids.
 428 *****************************************************************/
 429
 430 static int sid_compare_auth(const DOM_SID *sid1, const DOM_SID *sid2)
 431 {
 432         int i;
 433
 434         if (sid1 == sid2)
 435                 return 0;
 436         if (!sid1)
 437                 return -1;
 438         if (!sid2)
 439                 return 1;
 440
 441         if (sid1->sid_rev_num != sid2->sid_rev_num)
 442                 return sid1->sid_rev_num - sid2->sid_rev_num;
 443
 444         for (i = 0; i < 6; i++)
 445                 if (sid1->id_auth[i] != sid2->id_auth[i])
 446                         return sid1->id_auth[i] - sid2->id_auth[i];
 447
 448         return 0;
 449 }
 450
 451 /*****************************************************************
 452  Compare two sids.
 453 *****************************************************************/
 454
 455 int sid_compare(const DOM_SID *sid1, const DOM_SID *sid2)
 456 {
 457         int i;
 458
 459         if (sid1 == sid2)
 460                 return 0;
 461         if (!sid1)
 462                 return -1;
 463         if (!sid2)
 464                 return 1;
 465
 466         /* Compare most likely different rids, first: i.e start at end */
 467         if (sid1->num_auths != sid2->num_auths)
 468                 return sid1->num_auths - sid2->num_auths;
 469
 470         for (i = sid1->num_auths-1; i >= 0; --i)
 471                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
 472                         return sid1->sub_auths[i] - sid2->sub_auths[i];
 473
 474         return sid_compare_auth(sid1, sid2);
 475 }
 476
 477 /*****************************************************************
 478  See if 2 SIDs are in the same domain
 479  this just compares the leading sub-auths
 480 *****************************************************************/
 481
 482 int sid_compare_domain(const DOM_SID *sid1, const DOM_SID *sid2)
 483 {
 484         int n, i;
 485
 486         n = MIN(sid1->num_auths, sid2->num_auths);
 487
 488         for (i = n-1; i >= 0; --i)
 489                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
 490                         return sid1->sub_auths[i] - sid2->sub_auths[i];
 491
 492         return sid_compare_auth(sid1, sid2);
 493 }
 494
 495 /*****************************************************************
 496  Compare two sids.
 497 *****************************************************************/
 498
 499 BOOL sid_equal(const DOM_SID *sid1, const DOM_SID *sid2)
 500 {
 501         return sid_compare(sid1, sid2) == 0;
 502 }
 503
 504 /*****************************************************************
 505  Calculates size of a sid.
 506 *****************************************************************/
 507
 508 size_t sid_size(const DOM_SID *sid)
 509 {
 510         if (sid == NULL)
 511                 return 0;
 512
 513         return sid->num_auths * sizeof(uint32) + 8;
 514 }
 515
 516 /*****************************************************************
 517  Returns true if SID is internal (and non-mappable).
 518 *****************************************************************/
 519
 520 BOOL non_mappable_sid(DOM_SID *sid)
 521 {
 522         DOM_SID dom;
 523         uint32 rid;
 524
 525         sid_copy(&dom, sid);
 526         sid_split_rid(&dom, &rid);
 527
 528         if (sid_equal(&dom, &global_sid_Builtin))
 529                 return True;
 530
 531         if (sid_equal(&dom, &global_sid_NT_Authority))
 532                 return True;
 533
 534         return False;
 535 }
 536
 537 /*****************************************************************
 538  Return the binary string representation of a DOM_SID.
 539  Caller must free.
 540 *****************************************************************/
 541
 542 char *sid_binstring(const DOM_SID *sid)
 543 {
 544         char *buf, *s;
 545         int len = sid_size(sid);
 546         buf = (char *)SMB_MALLOC(len);
 547         if (!buf)
 548                 return NULL;
 549         sid_linearize(buf, len, sid);
 550         s = binary_string_rfc2254(buf, len);
 551         free(buf);
 552         return s;
 553 }
 554
 555 /*****************************************************************
 556  Return the binary string representation of a DOM_SID.
 557  Caller must free.
 558 *****************************************************************/
 559
 560 char *sid_binstring_hex(const DOM_SID *sid)
 561 {
 562         char *buf, *s;
 563         int len = sid_size(sid);
 564         buf = (char *)SMB_MALLOC(len);
 565         if (!buf)
 566                 return NULL;
 567         sid_linearize(buf, len, sid);
 568         s = binary_string(buf, len);
 569         free(buf);
 570         return s;
 571 }
 572
 573 /*******************************************************************
 574  Tallocs a duplicate SID.
 575 ********************************************************************/
 576
 577 DOM_SID *sid_dup_talloc(TALLOC_CTX *ctx, const DOM_SID *src)
 578 {
 579         DOM_SID *dst;
 580
 581         if(!src)
 582                 return NULL;
 583
 584         if((dst = TALLOC_ZERO_P(ctx, DOM_SID)) != NULL) {
 585                 sid_copy( dst, src);
 586         }
 587
 588         return dst;
 589 }
 590
 591 /********************************************************************
 592  Add SID to an array SIDs
 593 ********************************************************************/
 594
 595 BOOL add_sid_to_array(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 596                       DOM_SID **sids, size_t *num)
 597 {
 598         *sids = TALLOC_REALLOC_ARRAY(mem_ctx, *sids, DOM_SID,
 599                                              (*num)+1);
 600         if (*sids == NULL) {
 601                 *num = 0;
 602                 return False;
 603         }
 604
 605         sid_copy(&((*sids)[*num]), sid);
 606         *num += 1;
 607
 608         return True;
 609 }
 610
 611
 612 /********************************************************************
 613  Add SID to an array SIDs ensuring that it is not already there
 614 ********************************************************************/
 615
 616 BOOL add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 617                              DOM_SID **sids, size_t *num_sids)
 618 {
 619         size_t i;
 620
 621         for (i=0; i<(*num_sids); i++) {
 622                 if (sid_compare(sid, &(*sids)[i]) == 0)
 623                         return True;
 624         }
 625
 626         return add_sid_to_array(mem_ctx, sid, sids, num_sids);
 627 }
 628
 629 /********************************************************************
 630  Remove SID from an array
 631 ********************************************************************/
 632
 633 void del_sid_from_array(const DOM_SID *sid, DOM_SID **sids, size_t *num)
 634 {
 635         DOM_SID *sid_list = *sids;
 636         size_t i;
 637
 638         for ( i=0; i<*num; i++ ) {
 639
 640                 /* if we find the SID, then decrement the count
 641                    and break out of the loop */
 642
 643                 if ( sid_equal(sid, &sid_list[i]) ) {
 644                         *num -= 1;
 645                         break;
 646                 }
 647         }
 648
 649         /* This loop will copy the remainder of the array
 650            if i < num of sids ni the array */
 651
 652         for ( ; i<*num; i++ )
 653                 sid_copy( &sid_list[i], &sid_list[i+1] );
 654
 655         return;
 656 }
 657
 658 BOOL add_rid_to_array_unique(TALLOC_CTX *mem_ctx,
 659                                     uint32 rid, uint32 **pp_rids, size_t *p_num)
 660 {
 661         size_t i;
 662
 663         for (i=0; i<*p_num; i++) {
 664                 if ((*pp_rids)[i] == rid)
 665                         return True;
 666         }
 667
 668         *pp_rids = TALLOC_REALLOC_ARRAY(mem_ctx, *pp_rids, uint32, *p_num+1);
 669
 670         if (*pp_rids == NULL) {
 671                 *p_num = 0;
 672                 return False;
 673         }
 674
 675         (*pp_rids)[*p_num] = rid;
 676         *p_num += 1;
 677         return True;
 678 }
 679
 680 BOOL is_null_sid(const DOM_SID *sid)
 681 {
 682         static const DOM_SID null_sid = {0};
 683         return sid_equal(sid, &null_sid);
 684 }
 685
 686 NTSTATUS sid_array_from_info3(TALLOC_CTX *mem_ctx,
 687                               const NET_USER_INFO_3 *info3,
 688                               DOM_SID **user_sids,
 689                               size_t *num_user_sids,
 690                               BOOL include_user_group_rid)
 691 {
 692         DOM_SID sid;
 693         DOM_SID *sid_array = NULL;
 694         size_t num_sids = 0;
 695         int i;
 696
 697         if (include_user_group_rid) {
 698
 699                 if (!sid_compose(&sid, &(info3->dom_sid.sid),
 700                                  info3->user_rid)
 701                     || !add_sid_to_array(mem_ctx, &sid,
 702                                          &sid_array, &num_sids)) {
 703                         DEBUG(3,("could not add user SID from rid 0x%x\n",
 704                                  info3->user_rid));
 705                         return NT_STATUS_INVALID_PARAMETER;
 706                 }
 707
 708                 if (!sid_compose(&sid, &(info3->dom_sid.sid),
 709                                  info3->group_rid)
 710                     || !add_sid_to_array(mem_ctx, &sid,
 711                                          &sid_array, &num_sids)) {
 712                         DEBUG(3,("could not append additional group rid 0x%x\n",
 713                                  info3->group_rid));
 714
 715                         return NT_STATUS_INVALID_PARAMETER;
 716                 }
 717         }
 718
 719         for (i = 0; i < info3->num_groups2; i++) {
 720                 if (!sid_compose(&sid, &(info3->dom_sid.sid),
 721                                  info3->gids[i].g_rid)
 722                     || !add_sid_to_array(mem_ctx, &sid,
 723                                          &sid_array, &num_sids)) {
 724                         DEBUG(3,("could not append additional group rid 0x%x\n",
 725                                  info3->gids[i].g_rid));
 726                         return NT_STATUS_INVALID_PARAMETER;
 727                 }
 728         }
 729
 730         /* Copy 'other' sids.  We need to do sid filtering here to
 731            prevent possible elevation of privileges.  See:
 732
 733            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 734          */
 735
 736         for (i = 0; i < info3->num_other_sids; i++) {
 737                 if (!add_sid_to_array(mem_ctx, &info3->other_sids[i].sid,
 738                                       &sid_array, &num_sids)) {
 739                         DEBUG(3, ("could not add SID to array: %s\n",
 740                                   sid_string_static(&info3->other_sids[i].sid)));
 741                         return NT_STATUS_NO_MEMORY;
 742                 }
 743         }
 744
 745         *user_sids = sid_array;
 746         *num_user_sids = num_sids;
 747
 748         return NT_STATUS_OK;
 749 }