source3/smbd/uid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    uid/user handling
   4    Copyright (C) Andrew Tridgell 1992-1998
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22
  23 /* what user is current? */
  24 extern struct current_user current_user;
  25
  26 /****************************************************************************
  27  Become the guest user without changing the security context stack.
  28 ****************************************************************************/
  29
  30 BOOL change_to_guest(void)
  31 {
  32         static struct passwd *pass=NULL;
  33
  34         if (!pass) {
  35                 /* Don't need to free() this as its stored in a static */
  36                 pass = getpwnam_alloc(lp_guestaccount());
  37                 if (!pass)
  38                         return(False);
  39         }
  40
  41 #ifdef AIX
  42         /* MWW: From AIX FAQ patch to WU-ftpd: call initgroups before
  43            setting IDs */
  44         initgroups(pass->pw_name, pass->pw_gid);
  45 #endif
  46
  47         set_sec_ctx(pass->pw_uid, pass->pw_gid, 0, NULL, NULL);
  48
  49         current_user.conn = NULL;
  50         current_user.vuid = UID_FIELD_INVALID;
  51
  52         return True;
  53 }
  54
  55 /*******************************************************************
  56  Check if a username is OK.
  57 ********************************************************************/
  58
  59 static BOOL check_user_ok(connection_struct *conn, user_struct *vuser,int snum)
  60 {
  61         int i;
  62         for (i=0;i<conn->vuid_cache.entries && i< VUID_CACHE_SIZE;i++)
  63                 if (conn->vuid_cache.list[i] == vuser->vuid)
  64                         return(True);
  65
  66         if ((conn->force_user || conn->force_group)
  67             && (conn->vuid != vuser->vuid)) {
  68                 return False;
  69         }
  70
  71         if (!user_ok(vuser->user.unix_name,snum))
  72                 return(False);
  73
  74         if (!share_access_check(conn, snum, vuser, conn->read_only ? FILE_READ_DATA : FILE_WRITE_DATA)) {
  75                 return False;
  76         }
  77
  78         i = conn->vuid_cache.entries % VUID_CACHE_SIZE;
  79         conn->vuid_cache.list[i] = vuser->vuid;
  80
  81         conn->vuid_cache.entries++;
  82
  83         return(True);
  84 }
  85
  86 /****************************************************************************
  87  Become the user of a connection number without changing the security context
  88  stack, but modify the currnet_user entries.
  89 ****************************************************************************/
  90
  91 BOOL change_to_user(connection_struct *conn, uint16 vuid)
  92 {
  93         user_struct *vuser = get_valid_user_struct(vuid);
  94         int snum;
  95         gid_t gid;
  96         uid_t uid;
  97         char group_c;
  98         BOOL must_free_token = False;
  99         NT_USER_TOKEN *token = NULL;
 100
 101         if (!conn) {
 102                 DEBUG(2,("change_to_user: Connection not open\n"));
 103                 return(False);
 104         }
 105
 106         /*
 107          * We need a separate check in security=share mode due to vuid
 108          * always being UID_FIELD_INVALID. If we don't do this then
 109          * in share mode security we are *always* changing uid's between
 110          * SMB's - this hurts performance - Badly.
 111          */
 112
 113         if((lp_security() == SEC_SHARE) && (current_user.conn == conn) &&
 114            (current_user.uid == conn->uid)) {
 115                 DEBUG(4,("change_to_user: Skipping user change - already user\n"));
 116                 return(True);
 117         } else if ((current_user.conn == conn) &&
 118                    (vuser != 0) && (current_user.vuid == vuid) &&
 119                    (current_user.uid == vuser->uid)) {
 120                 DEBUG(4,("change_to_user: Skipping user change - already user\n"));
 121                 return(True);
 122         }
 123
 124         snum = SNUM(conn);
 125
 126         if (conn->force_user) /* security = share sets this too */ {
 127                 uid = conn->uid;
 128                 gid = conn->gid;
 129                 current_user.groups = conn->groups;
 130                 current_user.ngroups = conn->ngroups;
 131                 token = conn->nt_user_token;
 132         } else if ((vuser) && check_user_ok(conn, vuser, snum)) {
 133                 uid = vuser->uid;
 134                 gid = vuser->gid;
 135                 current_user.ngroups = vuser->n_groups;
 136                 current_user.groups  = vuser->groups;
 137                 token = vuser->nt_user_token;
 138         } else {
 139                 DEBUG(2,("change_to_user: Invalid vuid used %d or vuid not permitted access to share.\n",vuid));
 140                 return False;
 141         }
 142
 143         /*
 144          * See if we should force group for this service.
 145          * If so this overrides any group set in the force
 146          * user code.
 147          */
 148
 149         if((group_c = *lp_force_group(snum))) {
 150                 BOOL is_guest = False;
 151
 152                 if(group_c == '+') {
 153
 154                         /*
 155                          * Only force group if the user is a member of
 156                          * the service group. Check the group memberships for
 157                          * this user (we already have this) to
 158                          * see if we should force the group.
 159                          */
 160
 161                         int i;
 162                         for (i = 0; i < current_user.ngroups; i++) {
 163                                 if (current_user.groups[i] == conn->gid) {
 164                                         gid = conn->gid;
 165                                         break;
 166                                 }
 167                         }
 168                 } else {
 169                         gid = conn->gid;
 170                 }
 171
 172                 /*
 173                  * We've changed the group list in the token - we must
 174                  * re-create it.
 175                  */
 176
 177                 if (vuser && vuser->guest)
 178                         is_guest = True;
 179
 180                 token = create_nt_token(uid, gid, current_user.ngroups, current_user.groups, is_guest);
 181                 if (!token) {
 182                         DEBUG(1, ("change_to_user: create_nt_token failed!\n"));
 183                         return False;
 184                 }
 185                 must_free_token = True;
 186         }
 187
 188         set_sec_ctx(uid, gid, current_user.ngroups, current_user.groups, token);
 189
 190         /*
 191          * Free the new token (as set_sec_ctx copies it).
 192          */
 193
 194         if (must_free_token)
 195                 delete_nt_token(&token);
 196
 197         current_user.conn = conn;
 198         current_user.vuid = vuid;
 199
 200         DEBUG(5,("change_to_user uid=(%d,%d) gid=(%d,%d)\n",
 201                  (int)getuid(),(int)geteuid(),(int)getgid(),(int)getegid()));
 202
 203         return(True);
 204 }
 205
 206 /****************************************************************************
 207  Go back to being root without changing the security context stack,
 208  but modify the current_user entries.
 209 ****************************************************************************/
 210
 211 BOOL change_to_root_user(void)
 212 {
 213         set_root_sec_ctx();
 214
 215         DEBUG(5,("change_to_root_user: now uid=(%d,%d) gid=(%d,%d)\n",
 216                 (int)getuid(),(int)geteuid(),(int)getgid(),(int)getegid()));
 217
 218         current_user.conn = NULL;
 219         current_user.vuid = UID_FIELD_INVALID;
 220
 221         return(True);
 222 }
 223
 224 /****************************************************************************
 225  Become the user of an authenticated connected named pipe.
 226  When this is called we are currently running as the connection
 227  user. Doesn't modify current_user.
 228 ****************************************************************************/
 229
 230 BOOL become_authenticated_pipe_user(pipes_struct *p)
 231 {
 232         if (!push_sec_ctx())
 233                 return False;
 234
 235         set_sec_ctx(p->pipe_user.uid, p->pipe_user.gid,
 236                     p->pipe_user.ngroups, p->pipe_user.groups, p->pipe_user.nt_user_token);
 237
 238         return True;
 239 }
 240
 241 /****************************************************************************
 242  Unbecome the user of an authenticated connected named pipe.
 243  When this is called we are running as the authenticated pipe
 244  user and need to go back to being the connection user. Doesn't modify
 245  current_user.
 246 ****************************************************************************/
 247
 248 BOOL unbecome_authenticated_pipe_user(void)
 249 {
 250         return pop_sec_ctx();
 251 }
 252
 253 /****************************************************************************
 254  Utility functions used by become_xxx/unbecome_xxx.
 255 ****************************************************************************/
 256
 257 struct conn_ctx {
 258         connection_struct *conn;
 259         uint16 vuid;
 260 };
 261
 262 /* A stack of current_user connection contexts. */
 263
 264 static struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
 265 static int conn_ctx_stack_ndx;
 266
 267 static void push_conn_ctx(void)
 268 {
 269         struct conn_ctx *ctx_p;
 270
 271         /* Check we don't overflow our stack */
 272
 273         if (conn_ctx_stack_ndx == MAX_SEC_CTX_DEPTH) {
 274                 DEBUG(0, ("Connection context stack overflow!\n"));
 275                 smb_panic("Connection context stack overflow!\n");
 276         }
 277
 278         /* Store previous user context */
 279         ctx_p = &conn_ctx_stack[conn_ctx_stack_ndx];
 280
 281         ctx_p->conn = current_user.conn;
 282         ctx_p->vuid = current_user.vuid;
 283
 284         DEBUG(3, ("push_conn_ctx(%u) : conn_ctx_stack_ndx = %d\n",
 285                 (unsigned int)ctx_p->vuid, conn_ctx_stack_ndx ));
 286
 287         conn_ctx_stack_ndx++;
 288 }
 289
 290 static void pop_conn_ctx(void)
 291 {
 292         struct conn_ctx *ctx_p;
 293
 294         /* Check for stack underflow. */
 295
 296         if (conn_ctx_stack_ndx == 0) {
 297                 DEBUG(0, ("Connection context stack underflow!\n"));
 298                 smb_panic("Connection context stack underflow!\n");
 299         }
 300
 301         conn_ctx_stack_ndx--;
 302         ctx_p = &conn_ctx_stack[conn_ctx_stack_ndx];
 303
 304         current_user.conn = ctx_p->conn;
 305         current_user.vuid = ctx_p->vuid;
 306
 307         ctx_p->conn = NULL;
 308         ctx_p->vuid = UID_FIELD_INVALID;
 309 }
 310
 311 void init_conn_ctx(void)
 312 {
 313     int i;
 314
 315     /* Initialise connection context stack */
 316         for (i = 0; i < MAX_SEC_CTX_DEPTH; i++) {
 317                 conn_ctx_stack[i].conn = NULL;
 318                 conn_ctx_stack[i].vuid = UID_FIELD_INVALID;
 319     }
 320 }
 321
 322 /****************************************************************************
 323  Temporarily become a root user.  Must match with unbecome_root(). Saves and
 324  restores the connection context.
 325 ****************************************************************************/
 326
 327 void become_root(void)
 328 {
 329         push_sec_ctx();
 330         push_conn_ctx();
 331         set_root_sec_ctx();
 332 }
 333
 334 /* Unbecome the root user */
 335
 336 void unbecome_root(void)
 337 {
 338         pop_sec_ctx();
 339         pop_conn_ctx();
 340 }
 341
 342 /****************************************************************************
 343  Push the current security context then force a change via change_to_user().
 344  Saves and restores the connection context.
 345 ****************************************************************************/
 346
 347 BOOL become_user(connection_struct *conn, uint16 vuid)
 348 {
 349         if (!push_sec_ctx())
 350                 return False;
 351
 352         push_conn_ctx();
 353
 354         if (!change_to_user(conn, vuid)) {
 355                 pop_sec_ctx();
 356                 pop_conn_ctx();
 357                 return False;
 358         }
 359
 360         return True;
 361 }
 362
 363 BOOL unbecome_user(void)
 364 {
 365         pop_sec_ctx();
 366         pop_conn_ctx();
 367         return True;
 368 }
 369
 370 /*****************************************************************
 371  Convert the suplimentary SIDs returned in a netlogon into UNIX
 372  group gid_t's. Add to the total group array.
 373 *****************************************************************/
 374
 375 void add_supplementary_nt_login_groups(int *n_groups, gid_t **pp_groups, NT_USER_TOKEN **pptok)
 376 {
 377         int total_groups;
 378         int current_n_groups = *n_groups;
 379         gid_t *final_groups = NULL;
 380         size_t i;
 381         NT_USER_TOKEN *ptok = *pptok;
 382         NT_USER_TOKEN *new_tok = NULL;
 383
 384         if (!ptok || (ptok->num_sids == 0))
 385                 return;
 386
 387         new_tok = dup_nt_token(ptok);
 388         if (!new_tok) {
 389                 DEBUG(0,("add_supplementary_nt_login_groups: Failed to malloc new token\n"));
 390                 return;
 391         }
 392         /* Leave the allocated space but empty the number of SIDs. */
 393         new_tok->num_sids = 0;
 394
 395         total_groups = current_n_groups + ptok->num_sids;
 396
 397         final_groups = (gid_t *)malloc(total_groups * sizeof(gid_t));
 398         if (!final_groups) {
 399                 DEBUG(0,("add_supplementary_nt_login_groups: Failed to malloc new groups.\n"));
 400                 delete_nt_token(&new_tok);
 401                 return;
 402         }
 403
 404         memcpy(final_groups, *pp_groups, current_n_groups * sizeof(gid_t));
 405         for (i = 0; i < ptok->num_sids; i++) {
 406                 enum SID_NAME_USE sid_type;
 407                 gid_t new_grp;
 408
 409                 if (sid_to_gid(&ptok->user_sids[i], &new_grp, &sid_type)) {
 410                         /*
 411                          * Don't add the gid_t if it is already in the current group
 412                          * list. Some UNIXen don't like the same group more than once.
 413                          */
 414                         int j;
 415
 416                         for (j = 0; j < current_n_groups; j++)
 417                                 if (final_groups[j] == new_grp)
 418                                         break;
 419
 420                         if ( j == current_n_groups) {
 421                                 /* Group not already present. */
 422                                 final_groups[current_n_groups++] = new_grp;
 423                         }
 424                 } else {
 425                         /* SID didn't map. Copy to the new token to be saved. */
 426                         sid_copy(&new_tok->user_sids[new_tok->num_sids++], &ptok->user_sids[i]);
 427                 }
 428         }
 429
 430         SAFE_FREE(*pp_groups);
 431         *pp_groups = final_groups;
 432         *n_groups = current_n_groups;
 433
 434         /* Replace the old token with the truncated one. */
 435         delete_nt_token(&ptok);
 436         *pptok = new_tok;
 437 }
 438
 439 /*****************************************************************
 440  *THE CANONICAL* convert name to SID function.
 441  Tries local lookup first - for local domains - then uses winbind.
 442 *****************************************************************/
 443
 444 BOOL lookup_name(const char *domain, const char *name, DOM_SID *psid, enum SID_NAME_USE *name_type)
 445 {
 446         extern pstring global_myname;
 447         extern fstring global_myworkgroup;
 448         fstring sid;
 449         BOOL local_lookup = False;
 450
 451         *name_type = SID_NAME_UNKNOWN;
 452
 453         /* If we are looking up a domain user, make sure it is
 454            for the local machine only */
 455
 456         if (strequal(global_myname, domain)) {
 457                 local_lookup = True;
 458         } else if (lp_server_role() == ROLE_DOMAIN_PDC ||
 459                    lp_server_role() == ROLE_DOMAIN_PDC) {
 460                 if (strequal(domain, global_myworkgroup)) {
 461                         local_lookup = True;
 462                 }
 463         }
 464
 465         if (local_lookup) {
 466                 if (local_lookup_name(name, psid, name_type)) {
 467                         DEBUG(10,
 468                               ("lookup_name: (local) [%s]\\[%s] -> SID %s (type %s: %u)\n",
 469                                domain, name, sid_to_string(sid,psid),
 470                                sid_type_lookup(*name_type), (unsigned int)*name_type));
 471                         return True;
 472                 }
 473         } else {
 474                 /* Remote */
 475                 if (winbind_lookup_name(domain, name, psid, name_type)) {
 476
 477                         DEBUG(10,("lookup_name (winbindd): [%s]\\[%s] -> SID %s (type %u)\n",
 478                                   domain, name, sid_to_string(sid, psid),
 479                                   (unsigned int)*name_type));
 480                         return True;
 481                 }
 482         }
 483
 484         DEBUG(10, ("lookup_name: %s lookup for [%s]\\[%s] failed\n",
 485                    local_lookup ? "local" : "winbind", domain, name));
 486
 487         return False;
 488 }
 489
 490 /*****************************************************************
 491  *THE CANONICAL* convert SID to name function.
 492  Tries local lookup first - for local sids, then tries winbind.
 493 *****************************************************************/
 494
 495 BOOL lookup_sid(DOM_SID *sid, fstring dom_name, fstring name, enum SID_NAME_USE *name_type)
 496 {
 497         if (!name_type)
 498                 return False;
 499
 500         *name_type = SID_NAME_UNKNOWN;
 501
 502         /* Check if this is our own sid.  This should perhaps be done by
 503            winbind?  For the moment handle it here. */
 504
 505         if (sid->num_auths == 5) {
 506                 DOM_SID tmp_sid;
 507                 uint32 rid;
 508
 509                 sid_copy(&tmp_sid, sid);
 510                 sid_split_rid(&tmp_sid, &rid);
 511
 512                 if (sid_equal(get_global_sam_sid(), &tmp_sid)) {
 513
 514                         return map_domain_sid_to_name(&tmp_sid, dom_name) &&
 515                                 local_lookup_sid(sid, name, name_type);
 516                 }
 517         }
 518
 519         if (!winbind_lookup_sid(sid, dom_name, name, name_type)) {
 520                 fstring sid_str;
 521                 DOM_SID tmp_sid;
 522                 uint32 rid;
 523
 524                 DEBUG(10,("lookup_sid: winbind lookup for SID %s failed - trying local.\n", sid_to_string(sid_str, sid) ));
 525
 526                 sid_copy(&tmp_sid, sid);
 527                 sid_split_rid(&tmp_sid, &rid);
 528                 return map_domain_sid_to_name(&tmp_sid, dom_name) &&
 529                         lookup_known_rid(&tmp_sid, rid, name, name_type);
 530         }
 531         return True;
 532 }
 533
 534 /*****************************************************************
 535  *THE CANONICAL* convert uid_t to SID function.
 536  Tries winbind first - then uses local lookup.
 537  Returns SID pointer.
 538 *****************************************************************/
 539
 540 DOM_SID *uid_to_sid(DOM_SID *psid, uid_t uid)
 541 {
 542         uid_t low, high;
 543         fstring sid;
 544
 545         if (lp_winbind_uid(&low, &high) && uid >= low && uid <= high) {
 546                 if (winbind_uid_to_sid(psid, uid)) {
 547
 548                         DEBUG(10,("uid_to_sid: winbindd %u -> %s\n",
 549                                 (unsigned int)uid, sid_to_string(sid, psid)));
 550
 551                         return psid;
 552                 }
 553         }
 554
 555         /* Make sure we report failure, (when psid == NULL) */
 556         become_root();
 557         psid = local_uid_to_sid(psid, uid);
 558         unbecome_root();
 559
 560         DEBUG(10,("uid_to_sid: local %u -> %s\n", (unsigned int)uid, sid_to_string(sid, psid)));
 561
 562         return psid;
 563 }
 564
 565 /*****************************************************************
 566  *THE CANONICAL* convert gid_t to SID function.
 567  Tries winbind first - then uses local lookup.
 568  Returns SID pointer.
 569 *****************************************************************/
 570
 571 DOM_SID *gid_to_sid(DOM_SID *psid, gid_t gid)
 572 {
 573         gid_t low, high;
 574         fstring sid;
 575
 576         if (lp_winbind_gid(&low, &high) && gid >= low && gid <= high) {
 577                 if (winbind_gid_to_sid(psid, gid)) {
 578
 579                         DEBUG(10,("gid_to_sid: winbindd %u -> %s\n",
 580                                 (unsigned int)gid, sid_to_string(sid, psid)));
 581
 582                         return psid;
 583                 }
 584         }
 585
 586         /* Make sure we report failure, (when psid == NULL) */
 587         psid = local_gid_to_sid(psid, gid);
 588
 589         DEBUG(10,("gid_to_sid: local %u -> %s\n", (unsigned int)gid, sid_to_string(sid, psid)));
 590
 591         return psid;
 592 }
 593
 594 /*****************************************************************
 595  *THE CANONICAL* convert SID to uid function.
 596  Tries winbind first - then uses local lookup.
 597  Returns True if this name is a user sid and the conversion
 598  was done correctly, False if not. sidtype is set by this function.
 599 *****************************************************************/
 600
 601 BOOL sid_to_uid(const DOM_SID *psid, uid_t *puid, enum SID_NAME_USE *sidtype)
 602 {
 603         fstring sid_str;
 604
 605         /* if we know its local then don't try winbindd */
 606         if (sid_compare_domain(get_global_sam_sid(), psid) == 0) {
 607                 BOOL result;
 608                 become_root();
 609                 result = local_sid_to_uid(puid, psid, sidtype);
 610                 unbecome_root();
 611                 return result;
 612         }
 613
 614 /* (tridge) I commented out the slab of code below in order to support foreign SIDs
 615    Do we really need to validate the type of SID we have in this case?
 616 */
 617 #if 0
 618         fstring dom_name, name;
 619         enum SID_NAME_USE name_type;
 620
 621         *sidtype = SID_NAME_UNKNOWN;
 622         /*
 623          * First we must look up the name and decide if this is a user sid.
 624          */
 625
 626         if ( (!winbind_lookup_sid(psid, dom_name, name, &name_type)) || (name_type != SID_NAME_USER) ) {
 627                 BOOL result;
 628                 DEBUG(10,("sid_to_uid: winbind lookup for sid %s failed - trying local.\n",
 629                                 sid_to_string(sid_str, psid) ));
 630
 631                 become_root();
 632                 result = local_sid_to_uid(puid, psid, sidtype);
 633                 unbecome_root();
 634                 return result;
 635         }
 636
 637         /*
 638          * Ensure this is a user sid.
 639          */
 640
 641         if (name_type != SID_NAME_USER) {
 642                 DEBUG(10,("sid_to_uid: winbind lookup succeeded but SID is not a uid (%u)\n",
 643                                 (unsigned int)name_type ));
 644                 return False;
 645         }
 646 #endif
 647         *sidtype = SID_NAME_USER;
 648
 649         /*
 650          * Get the uid for this SID.
 651          */
 652
 653         if (!winbind_sid_to_uid(puid, psid)) {
 654                 BOOL result;
 655                 DEBUG(10,("sid_to_uid: winbind lookup for sid %s failed.\n",
 656                                 sid_to_string(sid_str, psid) ));
 657                 become_root();
 658                 result = local_sid_to_uid(puid, psid, sidtype);
 659                 unbecome_root();
 660                 return result;
 661         }
 662
 663         DEBUG(10,("sid_to_uid: winbindd %s -> %u\n",
 664                 sid_to_string(sid_str, psid),
 665                 (unsigned int)*puid ));
 666
 667         return True;
 668 }
 669
 670 /*****************************************************************
 671  *THE CANONICAL* convert SID to gid function.
 672  Tries winbind first - then uses local lookup.
 673  Returns True if this name is a user sid and the conversion
 674  was done correctly, False if not.
 675 *****************************************************************/
 676
 677 BOOL sid_to_gid(const DOM_SID *psid, gid_t *pgid, enum SID_NAME_USE *sidtype)
 678 {
 679         fstring dom_name, name, sid_str;
 680         enum SID_NAME_USE name_type;
 681
 682         *sidtype = SID_NAME_UNKNOWN;
 683
 684         /*
 685          * First we must look up the name and decide if this is a group sid.
 686          */
 687
 688         /* if we know its local then don't try winbindd */
 689         if (sid_compare_domain(get_global_sam_sid(), psid) == 0) {
 690                 BOOL result;
 691                 become_root();
 692                 result = local_sid_to_gid(pgid, psid, sidtype);
 693                 unbecome_root();
 694                 return result;
 695         }
 696
 697         if (!winbind_lookup_sid(psid, dom_name, name, &name_type)) {
 698                 DEBUG(10,("sid_to_gid: winbind lookup for sid %s failed.\n",
 699                                 sid_to_string(sid_str, psid) ));
 700                 /* this was probably a foreign sid - assume its a group rid
 701                    and continue */
 702                 name_type = SID_NAME_DOM_GRP;
 703         }
 704
 705         /*
 706          * Ensure this is a group sid.
 707          */
 708
 709         if ((name_type != SID_NAME_DOM_GRP) && (name_type != SID_NAME_ALIAS) && (name_type != SID_NAME_WKN_GRP)) {
 710                 DEBUG(10,("sid_to_gid: winbind lookup succeeded but SID is not a known group (%u)\n",
 711                                 (unsigned int)name_type ));
 712
 713                 return False;
 714         }
 715
 716         *sidtype = name_type;
 717
 718         /*
 719          * Get the gid for this SID.
 720          */
 721
 722         if (!winbind_sid_to_gid(pgid, psid)) {
 723                 DEBUG(10,("sid_to_gid: winbind lookup for sid %s failed.\n",
 724                                 sid_to_string(sid_str, psid) ));
 725                 return False;
 726         }
 727
 728         DEBUG(10,("sid_to_gid: winbindd %s -> %u\n",
 729                 sid_to_string(sid_str, psid),
 730                 (unsigned int)*pgid ));
 731
 732         return True;
 733 }
 734