source/nsswitch/winbindd_group.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 2.0
   4
   5    Winbind daemon for ntdom nss module
   6
   7    Copyright (C) Tim Potter 2000
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "winbindd.h"
  25
  26 /* Fill a grent structure from various other information */
  27
  28 static BOOL fill_grent(struct winbindd_gr *gr, char *gr_name,
  29                        gid_t unix_gid)
  30 {
  31         /* Fill in uid/gid */
  32
  33         gr->gr_gid = unix_gid;
  34
  35         /* Group name and password */
  36
  37         safe_strcpy(gr->gr_name, gr_name, sizeof(gr->gr_name) - 1);
  38         safe_strcpy(gr->gr_passwd, "x", sizeof(gr->gr_passwd) - 1);
  39
  40         return True;
  41 }
  42
  43 /* Fill in the group membership field of a NT group given by group_rid */
  44
  45 static BOOL fill_grent_mem(struct winbindd_domain *domain,
  46                            uint32 group_rid,
  47                            enum SID_NAME_USE group_name_type,
  48                            int *num_gr_mem, char **gr_mem, int *gr_mem_len)
  49 {
  50         uint32 *rid_mem = NULL, num_names = 0;
  51         enum SID_NAME_USE *name_types = NULL;
  52         int buf_len, buf_ndx, i;
  53         char **names = NULL, *buf;
  54         BOOL result = False;
  55
  56         if (!num_gr_mem || !gr_mem || !gr_mem_len) return False;
  57
  58         /* Initialise group membership information */
  59
  60         DEBUG(10, ("fill_grent_mem(): group %s rid 0x%x\n",
  61                    domain ? domain->name : "NULL", group_rid));
  62
  63         *num_gr_mem = 0;
  64
  65         if (group_name_type != SID_NAME_DOM_GRP) {
  66                 DEBUG(1, ("fill_grent_mem(): rid %d in domain %s isn't a "
  67                           "domain group\n", group_rid, domain->name));
  68                 return False;
  69         }
  70
  71         /* Lookup group members */
  72
  73         if (!winbindd_lookup_groupmem(domain, group_rid, &num_names,
  74                                       &rid_mem, &names, &name_types)) {
  75
  76                 DEBUG(1, ("fill_grent_mem(): could not lookup membership "
  77                           "for group rid %d in domain %s\n",
  78                           group_rid, domain->name));
  79
  80                 return False;
  81         }
  82
  83         DEBUG(10, ("fill_grent_mem(): looked up %d names\n", num_names));
  84
  85         if (DEBUGLEVEL >= 10) {
  86                 for (i = 0; i < num_names; i++) {
  87                         DEBUG(10, ("\t%20s %x %d\n", names[i], rid_mem[i],
  88                                    name_types[i]));
  89                 }
  90         }
  91
  92         /* Add members to list */
  93
  94         buf = NULL;
  95         buf_len = buf_ndx = 0;
  96
  97  again:
  98
  99         for (i = 0; i < num_names; i++) {
 100                 char *the_name;
 101                 fstring name;
 102                 int len;
 103
 104                 the_name = names[i];
 105
 106                 DEBUG(10, ("fill_grent_mem(): processing name %s\n", the_name));
 107
 108                 /* Only add domain users */
 109
 110                 if (name_types[i] != SID_NAME_USER) {
 111                         DEBUG(3, ("fill_grent_mem(): name %s isn't a domain "
 112                                   "user\n", the_name));
 113                         continue;
 114                 }
 115
 116                 /* Don't bother with machine accounts */
 117
 118                 if (the_name[strlen(the_name) - 1] == '$') {
 119                         DEBUG(10, ("fill_grent_mem(): %s is machine account\n",
 120                                    the_name));
 121                         continue;
 122                 }
 123
 124                 /* Append domain name */
 125
 126                 snprintf(name, sizeof(name), "%s%s%s", domain->name,
 127                          lp_winbind_separator(), the_name);
 128
 129                 len = strlen(name);
 130
 131                 /* Add to list or calculate buffer length */
 132
 133                 if (!buf) {
 134                         buf_len += len + 1; /* List is comma separated */
 135                         (*num_gr_mem)++;
 136                         DEBUG(10, ("fill_grent_mem(): buf_len + %d = %d\n", len + 1,
 137                                    buf_len));
 138                 } else {
 139                         DEBUG(10, ("fill_grent_mem(): appending %s at index %d\n",
 140                                    name, len));
 141                         safe_strcpy(&buf[buf_ndx], name, len);
 142                         buf_ndx += len;
 143                         buf[buf_ndx] = ',';
 144                         buf_ndx++;
 145                 }
 146         }
 147
 148         /* Allocate buffer */
 149
 150         if (!buf) {
 151                 if (!(buf = malloc(buf_len))) {
 152                         DEBUG(1, ("fill_grent_mem(): out of memory\n"));
 153                         result = False;
 154                         goto cleanup;
 155                 }
 156                 memset(buf, 0, buf_len);
 157                 goto again;
 158         }
 159
 160         if (buf && buf_ndx > 0) {
 161                 buf[buf_ndx - 1] = '\0';
 162         }
 163
 164         *gr_mem = buf;
 165         *gr_mem_len = buf_len;
 166
 167         DEBUG(10, ("fill_grent_mem(): num_mem = %d, len = %d, mem = %s\n", *num_gr_mem,
 168                    buf_len, buf));
 169
 170         result = True;
 171
 172  cleanup:
 173
 174         /* Free memory allocated in winbindd_lookup_groupmem() */
 175
 176         safe_free(name_types);
 177         safe_free(rid_mem);
 178
 179         free_char_array(num_names, names);
 180
 181         DEBUG(10, ("fill_grent_mem(): returning %d\n", result));
 182
 183         return result;
 184 }
 185
 186 /* Return a group structure from a group name */
 187
 188 enum winbindd_result winbindd_getgrnam_from_group(struct winbindd_cli_state
 189                                                   *state)
 190 {
 191         DOM_SID group_sid;
 192         struct winbindd_domain *domain;
 193         enum SID_NAME_USE name_type;
 194         uint32 group_rid;
 195         fstring name_domain, name_group, name;
 196         char *tmp, *gr_mem;
 197         gid_t gid;
 198         int extra_data_len, gr_mem_len;
 199
 200         DEBUG(3, ("[%5d]: getgrnam %s\n", state->pid,
 201                   state->request.data.groupname));
 202
 203         /* Parse domain and groupname */
 204
 205         memset(name_group, 0, sizeof(fstring));
 206
 207         tmp = state->request.data.groupname;
 208         parse_domain_user(tmp, name_domain, name_group);
 209
 210         /* Reject names that don't have a domain - i.e name_domain contains
 211            the entire name. */
 212
 213         if (strequal(name_group, "")) {
 214                 return WINBINDD_ERROR;
 215         }
 216
 217         /* Get info for the domain */
 218
 219         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 220                 DEBUG(0, ("getgrname_from_group(): could not get domain "
 221                           "sid for domain %s\n", name_domain));
 222                 return WINBINDD_ERROR;
 223         }
 224
 225         if (!domain_handles_open(domain)) {
 226                 return WINBINDD_ERROR;
 227         }
 228
 229         /* Check for cached group entry */
 230
 231         if (winbindd_fetch_group_cache_entry(name_domain, name_group,
 232                                              &state->response.data.gr,
 233                                              &state->response.extra_data,
 234                                              &extra_data_len)) {
 235                 state->response.length += extra_data_len;
 236                 return WINBINDD_OK;
 237         }
 238
 239         snprintf(name, sizeof(name), "%s\\%s", name_domain, name_group);
 240
 241         /* Get rid and name type from name */
 242
 243         if (!winbindd_lookup_sid_by_name(name, &group_sid, &name_type)) {
 244                 DEBUG(1, ("group %s in domain %s does not exist\n",
 245                           name_group, name_domain));
 246                 return WINBINDD_ERROR;
 247         }
 248
 249         if ((name_type != SID_NAME_ALIAS) && (name_type != SID_NAME_DOM_GRP)) {
 250                 DEBUG(1, ("from_group: name '%s' is not a local or domain "
 251                           "group: %d\n", name_group, name_type));
 252                 return WINBINDD_ERROR;
 253         }
 254
 255         /* Fill in group structure */
 256
 257         sid_split_rid(&group_sid, &group_rid);
 258
 259         if (!winbindd_idmap_get_gid_from_rid(domain->name, group_rid, &gid)) {
 260                 DEBUG(1, ("error sursing unix gid for sid\n"));
 261                 return WINBINDD_ERROR;
 262         }
 263
 264         if (!fill_grent(&state->response.data.gr,
 265                         state->request.data.groupname, gid) ||
 266             !fill_grent_mem(domain, group_rid, name_type,
 267                             &state->response.data.gr.num_gr_mem,
 268                             &gr_mem, &gr_mem_len)) {
 269                 return WINBINDD_ERROR;
 270         }
 271
 272         /* Group membership lives at start of extra data */
 273
 274         state->response.data.gr.gr_mem_ofs = 0;
 275
 276         state->response.length += gr_mem_len;
 277         state->response.extra_data = gr_mem;
 278
 279         /* Update cached group info */
 280
 281         winbindd_store_group_cache_entry(name_domain, name_group,
 282                                          &state->response.data.gr,
 283                                          state->response.extra_data,
 284                                          gr_mem_len);
 285
 286         return WINBINDD_OK;
 287 }
 288
 289 /* Return a group structure from a gid number */
 290
 291 enum winbindd_result winbindd_getgrnam_from_gid(struct winbindd_cli_state
 292                                                 *state)
 293 {
 294         struct winbindd_domain *domain;
 295         DOM_SID group_sid;
 296         enum SID_NAME_USE name_type;
 297         fstring group_name;
 298         uint32 group_rid;
 299         int extra_data_len, gr_mem_len;
 300         char *gr_mem;
 301
 302         /* Bug out if the gid isn't in the winbind range */
 303
 304         if ((state->request.data.gid < server_state.gid_low) ||
 305             (state->request.data.gid > server_state.gid_high)) {
 306                 return WINBINDD_ERROR;
 307         }
 308
 309         DEBUG(3, ("[%5d]: getgrgid %d\n", state->pid,
 310                   state->request.data.gid));
 311
 312         /* Get rid from gid */
 313
 314         if (!winbindd_idmap_get_rid_from_gid(state->request.data.gid,
 315                                              &group_rid, &domain)) {
 316                 DEBUG(1, ("Could not convert gid %d to rid\n",
 317                           state->request.data.gid));
 318                 return WINBINDD_ERROR;
 319         }
 320
 321         if (!domain_handles_open(domain)) {
 322                 return WINBINDD_ERROR;
 323         }
 324
 325         /* Try a cached entry */
 326
 327         if (winbindd_fetch_gid_cache_entry(domain->name,
 328                                            state->request.data.gid,
 329                                            &state->response.data.gr,
 330                                            &state->response.extra_data,
 331                                            &extra_data_len)) {
 332                 state->response.length += extra_data_len;
 333                 return WINBINDD_OK;
 334         }
 335
 336         /* Get sid from gid */
 337
 338         sid_copy(&group_sid, &domain->sid);
 339         sid_append_rid(&group_sid, group_rid);
 340
 341         if (!winbindd_lookup_name_by_sid(&group_sid, group_name, &name_type)) {
 342                 DEBUG(1, ("Could not lookup sid\n"));
 343                 return WINBINDD_ERROR;
 344         }
 345
 346         if (strcmp(lp_winbind_separator(),"\\")) {
 347                 string_sub(group_name, "\\", lp_winbind_separator(),
 348                            sizeof(fstring));
 349         }
 350
 351         if (!((name_type == SID_NAME_ALIAS) ||
 352               (name_type == SID_NAME_DOM_GRP))) {
 353                 DEBUG(1, ("from_gid: name '%s' is not a local or domain "
 354                           "group: %d\n", group_name, name_type));
 355                 return WINBINDD_ERROR;
 356         }
 357
 358         /* Fill in group structure */
 359
 360         if (!fill_grent(&state->response.data.gr, group_name,
 361                         state->request.data.gid) ||
 362             !fill_grent_mem(domain, group_rid, name_type,
 363                             &state->response.data.gr.num_gr_mem,
 364                             &gr_mem, &gr_mem_len)) {
 365                 return WINBINDD_ERROR;
 366         }
 367
 368
 369         /* Group membership lives at start of extra data */
 370
 371         state->response.data.gr.gr_mem_ofs = 0;
 372
 373         state->response.length += gr_mem_len;
 374         state->response.extra_data = gr_mem;
 375
 376         /* Update cached group info */
 377
 378         winbindd_store_gid_cache_entry(domain->name, state->request.data.gid,
 379                                        &state->response.data.gr,
 380                                        state->response.extra_data,
 381                                        gr_mem_len);
 382
 383         return WINBINDD_OK;
 384 }
 385
 386 /*
 387  * set/get/endgrent functions
 388  */
 389
 390 /* "Rewind" file pointer for group database enumeration */
 391
 392 enum winbindd_result winbindd_setgrent(struct winbindd_cli_state *state)
 393 {
 394         struct winbindd_domain *tmp;
 395
 396         DEBUG(3, ("[%5d]: setgrent\n", state->pid));
 397
 398         if (state == NULL) return WINBINDD_ERROR;
 399
 400         /* Check user has enabled this */
 401
 402         if (!lp_winbind_enum_groups()) {
 403                 return WINBINDD_ERROR;
 404         }
 405
 406         /* Free old static data if it exists */
 407
 408         if (state->getgrent_state != NULL) {
 409                 free_getent_state(state->getgrent_state);
 410                 state->getgrent_state = NULL;
 411         }
 412
 413         /* Create sam pipes for each domain we know about */
 414
 415         for (tmp = domain_list; tmp != NULL; tmp = tmp->next) {
 416                 struct getent_state *domain_state;
 417
 418                 /* Skip domains other than WINBINDD_DOMAIN environment
 419                    variable */
 420
 421                 if ((strcmp(state->request.domain, "") != 0) &&
 422                     !check_domain_env(state->request.domain, tmp->name)) {
 423                         continue;
 424                 }
 425
 426                 /* Create a state record for this domain */
 427
 428                 if ((domain_state = (struct getent_state *)
 429                      malloc(sizeof(struct getent_state))) == NULL) {
 430
 431                         return WINBINDD_ERROR;
 432                 }
 433
 434                 ZERO_STRUCTP(domain_state);
 435
 436                 /* Add to list of open domains */
 437
 438                 domain_state->domain = tmp;
 439                 DLIST_ADD(state->getgrent_state, domain_state);
 440         }
 441
 442         return WINBINDD_OK;
 443 }
 444
 445 /* Close file pointer to ntdom group database */
 446
 447 enum winbindd_result winbindd_endgrent(struct winbindd_cli_state *state)
 448 {
 449         DEBUG(3, ("[%5d]: endgrent\n", state->pid));
 450
 451         if (state == NULL) return WINBINDD_ERROR;
 452
 453         free_getent_state(state->getgrent_state);
 454         state->getgrent_state = NULL;
 455
 456         return WINBINDD_OK;
 457 }
 458
 459 /* Get the list of domain groups and domain aliases for a domain.  We fill in
 460    the sam_entries and num_sam_entries fields with domain group information.
 461    The dispinfo_ndx field is incremented to the index of the next group to
 462    fetch. Return True if some groups were returned, False otherwise. */
 463
 464 #define MAX_FETCH_SAM_ENTRIES 100
 465
 466 static BOOL get_sam_group_entries(struct getent_state *ent)
 467 {
 468         uint32 status, num_entries;
 469         struct acct_info *name_list = NULL;
 470
 471         if (ent->got_all_sam_entries) {
 472                 return False;
 473         }
 474
 475 #if 0
 476         if (winbindd_fetch_group_cache(ent->domain->name,
 477                                        &ent->sam_entries,
 478                                        &ent->num_sam_entries)) {
 479                 return True;
 480         }
 481 #endif
 482
 483         /* Fetch group entries */
 484
 485         if (!domain_handles_open(ent->domain)) {
 486                 return False;
 487         }
 488
 489         /* Free any existing group info */
 490
 491         if (ent->sam_entries) {
 492                 free(ent->sam_entries);
 493                 ent->sam_entries = NULL;
 494                 ent->num_sam_entries = 0;
 495         }
 496
 497         /* Enumerate domain groups */
 498
 499         do {
 500                 struct acct_info *sam_grp_entries = NULL;
 501
 502                 num_entries = 0;
 503
 504                 status = samr_enum_dom_groups(&ent->domain->sam_dom_handle,
 505                                              &ent->grp_query_start_ndx,
 506                                              0x8000, /* buffer size? */
 507                                              (struct acct_info **)
 508                                              &sam_grp_entries,
 509                                              &num_entries);
 510
 511                 /* Copy entries into return buffer */
 512
 513                 if (num_entries) {
 514
 515                         name_list = Realloc(name_list,
 516                                             sizeof(struct acct_info) *
 517                                             (ent->num_sam_entries +
 518                                              num_entries));
 519
 520                         memcpy(&name_list[ent->num_sam_entries],
 521                                sam_grp_entries,
 522                                num_entries * sizeof(struct acct_info));
 523
 524                         safe_free(sam_grp_entries);
 525                 }
 526
 527                 ent->num_sam_entries += num_entries;
 528
 529                 if (status != STATUS_MORE_ENTRIES)
 530                         break;
 531
 532         } while (ent->num_sam_entries < MAX_FETCH_SAM_ENTRIES);
 533
 534 #if 0
 535         /* Fill cache with received entries */
 536
 537         winbindd_store_group_cache(ent->domain->name, ent->sam_entries,
 538                                    ent->num_sam_entries);
 539 #endif
 540
 541         /* Fill in remaining fields */
 542
 543         ent->sam_entries = name_list;
 544         ent->sam_entry_index = 0;
 545         ent->got_all_sam_entries = (status != STATUS_MORE_ENTRIES);
 546
 547         return ent->num_sam_entries > 0;
 548 }
 549
 550 /* Fetch next group entry from ntdom database */
 551
 552 #define MAX_GETGRENT_GROUPS 500
 553
 554 enum winbindd_result winbindd_getgrent(struct winbindd_cli_state *state)
 555 {
 556         struct getent_state *ent;
 557         struct winbindd_gr *group_list = NULL;
 558         int num_groups, group_list_ndx = 0, i, gr_mem_list_len = 0;
 559         char *sep, *new_extra_data, *gr_mem_list = NULL;
 560
 561         DEBUG(3, ("[%5d]: getgrent\n", state->pid));
 562
 563         if (state == NULL) return WINBINDD_ERROR;
 564
 565         /* Check user has enabled this */
 566
 567         if (!lp_winbind_enum_groups()) {
 568                 return WINBINDD_ERROR;
 569         }
 570
 571         num_groups = MIN(MAX_GETGRENT_GROUPS, state->request.data.num_entries);
 572
 573         if ((state->response.extra_data =
 574              malloc(num_groups * sizeof(struct winbindd_gr))) == NULL) {
 575                 return WINBINDD_ERROR;
 576         }
 577
 578         state->response.data.num_entries = 0;
 579
 580         group_list = (struct winbindd_gr *)state->response.extra_data;
 581         sep = lp_winbind_separator();
 582
 583         if (!(ent = state->getgrent_state)) {
 584                 return WINBINDD_ERROR;
 585         }
 586
 587         /* Start sending back groups */
 588
 589         for (i = 0; i < num_groups; i++) {
 590                 struct acct_info *name_list = NULL;
 591                 fstring domain_group_name;
 592                 uint32 result;
 593                 gid_t group_gid;
 594
 595                 /* Do we need to fetch another chunk of groups? */
 596
 597         tryagain:
 598
 599                 DEBUG(10, ("getgrent(): entry_index = %d, num_entries = %d\n",
 600                            ent->sam_entry_index, ent->num_sam_entries));
 601
 602                 if (ent->num_sam_entries == ent->sam_entry_index) {
 603
 604                         while(ent && !get_sam_group_entries(ent)) {
 605                                 struct getent_state *next_ent;
 606
 607                                 DEBUG(10, ("getgrent(): freeing state info for "
 608                                            "domain %s\n", ent->domain->name));
 609
 610                                 /* Free state information for this domain */
 611
 612                                 safe_free(ent->sam_entries);
 613                                 ent->sam_entries = NULL;
 614
 615                                 next_ent = ent->next;
 616                                 DLIST_REMOVE(state->getgrent_state, ent);
 617
 618                                 free(ent);
 619                                 ent = next_ent;
 620                         }
 621
 622                         /* No more domains */
 623
 624                         if (!ent) break;
 625                 }
 626
 627                 name_list = ent->sam_entries;
 628
 629                 /* Lookup group info */
 630
 631                 if (!winbindd_idmap_get_gid_from_rid(
 632                         ent->domain->name,
 633                         name_list[ent->sam_entry_index].rid,
 634                         &group_gid)) {
 635
 636                         DEBUG(1, ("getgrent(): could not look up gid for group %s\n",
 637                                   name_list[ent->sam_entry_index].acct_name));
 638
 639                         ent->sam_entry_index++;
 640                         goto tryagain;
 641                 }
 642
 643                 DEBUG(10, ("getgrent(): got gid %d for group %x\n", group_gid,
 644                            name_list[ent->sam_entry_index].rid));
 645
 646                 /* Fill in group entry */
 647
 648                 slprintf(domain_group_name, sizeof(domain_group_name) - 1,
 649                          "%s%s%s", ent->domain->name, lp_winbind_separator(),
 650                          name_list[ent->sam_entry_index].acct_name);
 651
 652                 result = fill_grent(&group_list[group_list_ndx],
 653                                     domain_group_name, group_gid);
 654
 655                 /* Fill in group membership entry */
 656
 657                 if (result) {
 658                         int gr_mem_len;
 659                         char *gr_mem, *new_gr_mem_list;
 660
 661                         /* Get group membership */
 662
 663                         result = fill_grent_mem(
 664                                 ent->domain,
 665                                 name_list[ent->sam_entry_index].rid,
 666                                 SID_NAME_DOM_GRP,
 667                                 &group_list[group_list_ndx].num_gr_mem,
 668                                 &gr_mem, &gr_mem_len);
 669
 670                         /* Append to group membership list */
 671
 672                         new_gr_mem_list = Realloc(
 673                                 gr_mem_list,
 674                                 gr_mem_list_len + gr_mem_len);
 675
 676                         if (!new_gr_mem_list && (group_list[group_list_ndx].num_gr_mem != 0)) {
 677                                 DEBUG(0, ("getgrent(): out of memory\n"));
 678                                 free(gr_mem_list);
 679                                 gr_mem_list_len = 0;
 680                                 break;
 681                         }
 682
 683                         DEBUG(10, ("getgrent(): list_len = %d, mem_len = %d\n",
 684                                    gr_mem_list_len, gr_mem_len));
 685
 686                         gr_mem_list = new_gr_mem_list;
 687
 688                         memcpy(&gr_mem_list[gr_mem_list_len], gr_mem,
 689                                gr_mem_len);
 690
 691                         safe_free(gr_mem);
 692
 693                         group_list[group_list_ndx].gr_mem_ofs =
 694                                 gr_mem_list_len;
 695
 696                         gr_mem_list_len += gr_mem_len;
 697                 }
 698
 699                 ent->sam_entry_index++;
 700
 701                 /* Add group to return list */
 702
 703                 if (result) {
 704
 705                         DEBUG(10, ("getgrent(): adding group num_entries = %d\n",
 706                                    state->response.data.num_entries));
 707
 708                         group_list_ndx++;
 709                         state->response.data.num_entries++;
 710
 711                         state->response.length +=
 712                                 sizeof(struct winbindd_gr);
 713
 714                 } else {
 715                         DEBUG(0, ("could not lookup domain group %s\n",
 716                                   domain_group_name));
 717                 }
 718         }
 719
 720         /* Copy the list of group memberships to the end of the extra data */
 721
 722         if (group_list_ndx == 0) {
 723                 goto done;
 724         }
 725
 726         new_extra_data = Realloc(
 727                 state->response.extra_data,
 728                 group_list_ndx * sizeof(struct winbindd_gr) + gr_mem_list_len);
 729
 730         if (!new_extra_data) {
 731                 DEBUG(0, ("out of memory\n"));
 732                 group_list_ndx = 0;
 733                 safe_free(state->response.extra_data);
 734                 state->response.extra_data = NULL;
 735                 safe_free(gr_mem_list);
 736
 737                 return WINBINDD_ERROR;
 738         }
 739
 740         state->response.extra_data = new_extra_data;
 741
 742         memcpy(&((char *)state->response.extra_data)
 743                [group_list_ndx * sizeof(struct winbindd_gr)],
 744                gr_mem_list, gr_mem_list_len);
 745
 746         safe_free(gr_mem_list);
 747
 748         state->response.length += gr_mem_list_len;
 749
 750         DEBUG(10, ("getgrent(): returning %d groups, length = %d\n",
 751                    group_list_ndx, gr_mem_list_len));
 752
 753         /* Out of domains */
 754
 755  done:
 756         return (group_list_ndx > 0) ? WINBINDD_OK : WINBINDD_ERROR;
 757 }
 758
 759 /* List domain groups without mapping to unix ids */
 760
 761 enum winbindd_result winbindd_list_groups(struct winbindd_cli_state *state)
 762 {
 763         uint32 total_entries = 0;
 764         uint32 num_domain_entries;
 765         struct winbindd_domain *domain;
 766         struct getent_state groups;
 767         char *extra_data = NULL;
 768         char *ted = NULL;
 769         int extra_data_len = 0, i;
 770         void *sam_entries = NULL;
 771
 772         DEBUG(3, ("[%5d]: list groups\n", state->pid));
 773
 774         /* Enumerate over trusted domains */
 775         ZERO_STRUCT(groups);
 776         for (domain = domain_list; domain; domain = domain->next) {
 777
 778                 /* Skip domains other than WINBINDD_DOMAIN environment
 779                    variable */
 780
 781                 if ((strcmp(state->request.domain, "") != 0) &&
 782                     !check_domain_env(state->request.domain, domain->name)) {
 783                         continue;
 784                 }
 785
 786                 /* Get list of sam groups */
 787
 788                 ZERO_STRUCT(groups);
 789                 groups.domain = domain;
 790
 791                 /*
 792                  * iterate through all groups
 793                  * total_entries          :  maintains a total count over **all domains**
 794                  * num_domain_entries :  is the running count for this domain
 795                  */
 796
 797                 num_domain_entries = 0;
 798                 while (get_sam_group_entries(&groups))
 799                 {
 800                         int new_size;
 801                         int offset;
 802
 803                         offset = sizeof(struct acct_info) * num_domain_entries;
 804                         new_size = sizeof(struct acct_info)
 805                                 * (groups.num_sam_entries + num_domain_entries);
 806                         sam_entries = Realloc(sam_entries, new_size);
 807
 808                         if (!sam_entries)
 809                                 return WINBINDD_ERROR;
 810
 811                         num_domain_entries += groups.num_sam_entries;
 812                         memcpy (sam_entries+offset, groups.sam_entries,
 813                                 sizeof(struct acct_info) * groups.num_sam_entries);
 814
 815                         groups.sam_entries = NULL;
 816                         groups.num_sam_entries = 0;
 817                 }
 818
 819                 /* skip remainder of loop if we idn;t retrieve any groups */
 820
 821                 if (num_domain_entries == 0)
 822                         continue;
 823
 824                 /* setup the groups struct to contain all the groups
 825                    retrieved for this domain */
 826
 827                 groups.num_sam_entries = num_domain_entries;
 828                 groups.sam_entries = sam_entries;
 829
 830                 /* keep track the of the total number of groups seen so
 831                    far over all domains */
 832
 833                 total_entries += groups.num_sam_entries;
 834
 835                 /* Allocate some memory for extra data.  Note that we limit
 836                    account names to sizeof(fstring) = 128 characters.  */
 837
 838                 ted = Realloc(extra_data, sizeof(fstring) * total_entries);
 839
 840                 if (!ted) {
 841                         DEBUG(0,("winbindd_list_groups: failed to enlarge buffer!\n"));
 842                         if (extra_data)
 843                                 free(extra_data);
 844                         return WINBINDD_ERROR;
 845                 } else
 846                         extra_data = ted;
 847
 848                 /* Pack group list into extra data fields */
 849
 850                 for (i = 0; i < groups.num_sam_entries; i++) {
 851                         char *group_name = ((struct acct_info *)
 852                                             groups.sam_entries)[i].acct_name;
 853                         fstring name;
 854
 855                         /* Convert unistring to ascii */
 856
 857                         snprintf(name, sizeof(name), "%s%s%s", domain->name,
 858                                 lp_winbind_separator(), group_name);
 859
 860                         /* Append to extra data */
 861
 862                         memcpy(&extra_data[extra_data_len], name, strlen(name));
 863                         extra_data_len += strlen(name);
 864
 865                         extra_data[extra_data_len++] = ',';
 866                 }
 867         }
 868
 869         /* Assign extra_data fields in response structure */
 870
 871         if (extra_data) {
 872                 extra_data[extra_data_len - 1] = '\0';
 873                 state->response.extra_data = extra_data;
 874                 state->response.length += extra_data_len;
 875         }
 876
 877         /* No domains may have responded but that's still OK so don't
 878            return an error. */
 879
 880         return WINBINDD_OK;
 881 }
 882
 883 /* Get user supplementary groups.  This is much quicker than trying to
 884    invert the groups database. */
 885
 886 enum winbindd_result winbindd_getgroups(struct winbindd_cli_state *state)
 887 {
 888         fstring name_domain, name_user, name;
 889         DOM_SID user_sid;
 890         enum SID_NAME_USE name_type;
 891         uint32 user_rid, num_groups, num_gids;
 892         DOM_GID *user_groups = NULL;
 893         struct winbindd_domain *domain;
 894         enum winbindd_result result;
 895         gid_t *gid_list;
 896         int i;
 897
 898         DEBUG(3, ("[%5d]: getgroups %s\n", state->pid,
 899                   state->request.data.username));
 900
 901         if (state == NULL) return WINBINDD_ERROR;
 902
 903         /* Parse domain and username */
 904
 905         parse_domain_user(state->request.data.username, name_domain,
 906                           name_user);
 907
 908         /* Reject names that don't have a domain - i.e name_domain contains
 909            the entire name. */
 910
 911         if (strequal(name_domain, "")) {
 912                 return WINBINDD_ERROR;
 913         }
 914
 915         /* Get info for the domain */
 916
 917         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 918                 DEBUG(0, ("could not find domain entry for domain %s\n",
 919                           name_domain));
 920                 return WINBINDD_ERROR;
 921         }
 922
 923         if (!domain_handles_open(domain)) {
 924                 return WINBINDD_ERROR;
 925         }
 926
 927         slprintf(name, sizeof(name) - 1, "%s\\%s", name_domain, name_user);
 928
 929         /* Get rid and name type from name.  The following costs 1 packet */
 930
 931         if (!winbindd_lookup_sid_by_name(name, &user_sid, &name_type)) {
 932                 DEBUG(1, ("user '%s' does not exist\n", name_user));
 933                 return WINBINDD_ERROR;
 934         }
 935
 936         if (name_type != SID_NAME_USER) {
 937                 DEBUG(1, ("name '%s' is not a user name: %d\n", name_user,
 938                           name_type));
 939                 return WINBINDD_ERROR;
 940         }
 941
 942         sid_split_rid(&user_sid, &user_rid);
 943
 944         if (!winbindd_lookup_usergroups(domain, user_rid, &num_groups,
 945                                         &user_groups)) {
 946                 return WINBINDD_ERROR;
 947         }
 948
 949         /* Copy data back to client */
 950
 951         num_gids = 0;
 952         gid_list = malloc(sizeof(gid_t) * num_groups);
 953
 954         if (state->response.extra_data) {
 955                 result = WINBINDD_ERROR;
 956                 goto done;
 957         }
 958
 959         for (i = 0; i < num_groups; i++) {
 960                 if (!winbindd_idmap_get_gid_from_rid(
 961                         domain->name, user_groups[i].g_rid,
 962                         &gid_list[num_gids])) {
 963
 964                         DEBUG(1, ("unable to convert group rid %d to gid\n",
 965                                   user_groups[i].g_rid));
 966                         continue;
 967                 }
 968
 969                 num_gids++;
 970         }
 971
 972         state->response.data.num_entries = num_gids;
 973         state->response.extra_data = gid_list;
 974         state->response.length += num_gids * sizeof(gid_t);
 975
 976         result = WINBINDD_OK;
 977
 978  done:
 979         safe_free(user_groups);
 980
 981         return result;
 982 }