source3/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         uint32 *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         NTSTATUS status;
 469         uint32 num_entries;
 470         struct acct_info *name_list = NULL;
 471
 472         if (ent->got_all_sam_entries) {
 473                 return False;
 474         }
 475
 476 #if 0
 477         if (winbindd_fetch_group_cache(ent->domain->name,
 478                                        &ent->sam_entries,
 479                                        &ent->num_sam_entries)) {
 480                 return True;
 481         }
 482 #endif
 483
 484         /* Fetch group entries */
 485
 486         if (!domain_handles_open(ent->domain)) {
 487                 return False;
 488         }
 489
 490         /* Free any existing group info */
 491
 492         SAFE_FREE(ent->sam_entries);
 493         ent->num_sam_entries = 0;
 494
 495         /* Enumerate domain groups */
 496
 497         do {
 498                 struct acct_info *sam_grp_entries = NULL;
 499
 500                 num_entries = 0;
 501
 502                 status = wb_samr_enum_dom_groups(&ent->domain->sam_dom_handle,
 503                                              &ent->grp_query_start_ndx,
 504                                              0x8000, /* buffer size? */
 505                                              (struct acct_info **)
 506                                              &sam_grp_entries,
 507                                              &num_entries);
 508
 509                 /* Copy entries into return buffer */
 510
 511                 if (num_entries) {
 512
 513                         name_list = Realloc(name_list,
 514                                             sizeof(struct acct_info) *
 515                                             (ent->num_sam_entries +
 516                                              num_entries));
 517
 518                         memcpy(&name_list[ent->num_sam_entries],
 519                                sam_grp_entries,
 520                                num_entries * sizeof(struct acct_info));
 521
 522                         SAFE_FREE(sam_grp_entries);
 523                 }
 524
 525                 ent->num_sam_entries += num_entries;
 526
 527                 if (NT_STATUS_V(status) != NT_STATUS_V(STATUS_MORE_ENTRIES))
 528                         break;
 529
 530         } while (ent->num_sam_entries < MAX_FETCH_SAM_ENTRIES);
 531
 532 #if 0
 533         /* Fill cache with received entries */
 534
 535         winbindd_store_group_cache(ent->domain->name, ent->sam_entries,
 536                                    ent->num_sam_entries);
 537 #endif
 538
 539         /* Fill in remaining fields */
 540
 541         ent->sam_entries = name_list;
 542         ent->sam_entry_index = 0;
 543         ent->got_all_sam_entries = (NT_STATUS_V(status) != NT_STATUS_V(STATUS_MORE_ENTRIES));
 544
 545         return ent->num_sam_entries > 0;
 546 }
 547
 548 /* Fetch next group entry from ntdom database */
 549
 550 #define MAX_GETGRENT_GROUPS 500
 551
 552 enum winbindd_result winbindd_getgrent(struct winbindd_cli_state *state)
 553 {
 554         struct getent_state *ent;
 555         struct winbindd_gr *group_list = NULL;
 556         int num_groups, group_list_ndx = 0, i, gr_mem_list_len = 0;
 557         char *sep, *new_extra_data, *gr_mem_list = NULL;
 558
 559         DEBUG(3, ("[%5d]: getgrent\n", state->pid));
 560
 561         if (state == NULL) return WINBINDD_ERROR;
 562
 563         /* Check user has enabled this */
 564
 565         if (!lp_winbind_enum_groups()) {
 566                 return WINBINDD_ERROR;
 567         }
 568
 569         num_groups = MIN(MAX_GETGRENT_GROUPS, state->request.data.num_entries);
 570
 571         if ((state->response.extra_data =
 572              malloc(num_groups * sizeof(struct winbindd_gr))) == NULL) {
 573                 return WINBINDD_ERROR;
 574         }
 575
 576         state->response.data.num_entries = 0;
 577
 578         group_list = (struct winbindd_gr *)state->response.extra_data;
 579         sep = lp_winbind_separator();
 580
 581         if (!(ent = state->getgrent_state)) {
 582                 return WINBINDD_ERROR;
 583         }
 584
 585         /* Start sending back groups */
 586
 587         for (i = 0; i < num_groups; i++) {
 588                 struct acct_info *name_list = NULL;
 589                 fstring domain_group_name;
 590                 uint32 result;
 591                 gid_t group_gid;
 592
 593                 /* Do we need to fetch another chunk of groups? */
 594
 595         tryagain:
 596
 597                 DEBUG(10, ("getgrent(): entry_index = %d, num_entries = %d\n",
 598                            ent->sam_entry_index, ent->num_sam_entries));
 599
 600                 if (ent->num_sam_entries == ent->sam_entry_index) {
 601
 602                         while(ent && !get_sam_group_entries(ent)) {
 603                                 struct getent_state *next_ent;
 604
 605                                 DEBUG(10, ("getgrent(): freeing state info for "
 606                                            "domain %s\n", ent->domain->name));
 607
 608                                 /* Free state information for this domain */
 609
 610                                 SAFE_FREE(ent->sam_entries);
 611                                 ent->sam_entries = NULL;
 612
 613                                 next_ent = ent->next;
 614                                 DLIST_REMOVE(state->getgrent_state, ent);
 615
 616                                 SAFE_FREE(ent);
 617                                 ent = next_ent;
 618                         }
 619
 620                         /* No more domains */
 621
 622                         if (!ent) break;
 623                 }
 624
 625                 name_list = ent->sam_entries;
 626
 627                 /* Lookup group info */
 628
 629                 if (!winbindd_idmap_get_gid_from_rid(
 630                         ent->domain->name,
 631                         name_list[ent->sam_entry_index].rid,
 632                         &group_gid)) {
 633
 634                         DEBUG(1, ("getgrent(): could not look up gid for group %s\n",
 635                                   name_list[ent->sam_entry_index].acct_name));
 636
 637                         ent->sam_entry_index++;
 638                         goto tryagain;
 639                 }
 640
 641                 DEBUG(10, ("getgrent(): got gid %d for group %x\n", group_gid,
 642                            name_list[ent->sam_entry_index].rid));
 643
 644                 /* Fill in group entry */
 645
 646                 slprintf(domain_group_name, sizeof(domain_group_name) - 1,
 647                          "%s%s%s", ent->domain->name, lp_winbind_separator(),
 648                          name_list[ent->sam_entry_index].acct_name);
 649
 650                 result = fill_grent(&group_list[group_list_ndx],
 651                                     domain_group_name, group_gid);
 652
 653                 /* Fill in group membership entry */
 654
 655                 if (result) {
 656                         int gr_mem_len;
 657                         char *gr_mem, *new_gr_mem_list;
 658
 659                         /* Get group membership */
 660
 661                         result = fill_grent_mem(
 662                                 ent->domain,
 663                                 name_list[ent->sam_entry_index].rid,
 664                                 SID_NAME_DOM_GRP,
 665                                 &group_list[group_list_ndx].num_gr_mem,
 666                                 &gr_mem, &gr_mem_len);
 667
 668                         /* Append to group membership list */
 669
 670                         new_gr_mem_list = Realloc(
 671                                 gr_mem_list,
 672                                 gr_mem_list_len + gr_mem_len);
 673
 674                         if (!new_gr_mem_list && (group_list[group_list_ndx].num_gr_mem != 0)) {
 675                                 DEBUG(0, ("getgrent(): out of memory\n"));
 676                                 SAFE_FREE(gr_mem_list);
 677                                 gr_mem_list_len = 0;
 678                                 break;
 679                         }
 680
 681                         DEBUG(10, ("getgrent(): list_len = %d, mem_len = %d\n",
 682                                    gr_mem_list_len, gr_mem_len));
 683
 684                         gr_mem_list = new_gr_mem_list;
 685
 686                         memcpy(&gr_mem_list[gr_mem_list_len], gr_mem,
 687                                gr_mem_len);
 688
 689                         SAFE_FREE(gr_mem);
 690
 691                         group_list[group_list_ndx].gr_mem_ofs =
 692                                 gr_mem_list_len;
 693
 694                         gr_mem_list_len += gr_mem_len;
 695                 }
 696
 697                 ent->sam_entry_index++;
 698
 699                 /* Add group to return list */
 700
 701                 if (result) {
 702
 703                         DEBUG(10, ("getgrent(): adding group num_entries = %d\n",
 704                                    state->response.data.num_entries));
 705
 706                         group_list_ndx++;
 707                         state->response.data.num_entries++;
 708
 709                         state->response.length +=
 710                                 sizeof(struct winbindd_gr);
 711
 712                 } else {
 713                         DEBUG(0, ("could not lookup domain group %s\n",
 714                                   domain_group_name));
 715                 }
 716         }
 717
 718         /* Copy the list of group memberships to the end of the extra data */
 719
 720         if (group_list_ndx == 0) {
 721                 goto done;
 722         }
 723
 724         new_extra_data = Realloc(
 725                 state->response.extra_data,
 726                 group_list_ndx * sizeof(struct winbindd_gr) + gr_mem_list_len);
 727
 728         if (!new_extra_data) {
 729                 DEBUG(0, ("out of memory\n"));
 730                 group_list_ndx = 0;
 731                 SAFE_FREE(state->response.extra_data);
 732                 SAFE_FREE(gr_mem_list);
 733
 734                 return WINBINDD_ERROR;
 735         }
 736
 737         state->response.extra_data = new_extra_data;
 738
 739         memcpy(&((char *)state->response.extra_data)
 740                [group_list_ndx * sizeof(struct winbindd_gr)],
 741                gr_mem_list, gr_mem_list_len);
 742
 743         SAFE_FREE(gr_mem_list);
 744
 745         state->response.length += gr_mem_list_len;
 746
 747         DEBUG(10, ("getgrent(): returning %d groups, length = %d\n",
 748                    group_list_ndx, gr_mem_list_len));
 749
 750         /* Out of domains */
 751
 752  done:
 753         return (group_list_ndx > 0) ? WINBINDD_OK : WINBINDD_ERROR;
 754 }
 755
 756 /* List domain groups without mapping to unix ids */
 757
 758 enum winbindd_result winbindd_list_groups(struct winbindd_cli_state *state)
 759 {
 760         uint32 total_entries = 0;
 761         uint32 num_domain_entries;
 762         struct winbindd_domain *domain;
 763         struct getent_state groups;
 764         char *extra_data = NULL;
 765         char *ted = NULL;
 766         int extra_data_len = 0, i;
 767         void *sam_entries = NULL;
 768
 769         DEBUG(3, ("[%5d]: list groups\n", state->pid));
 770
 771         /* Enumerate over trusted domains */
 772         ZERO_STRUCT(groups);
 773         for (domain = domain_list; domain; domain = domain->next) {
 774
 775                 /* Skip domains other than WINBINDD_DOMAIN environment
 776                    variable */
 777
 778                 if ((strcmp(state->request.domain, "") != 0) &&
 779                     !check_domain_env(state->request.domain, domain->name)) {
 780                         continue;
 781                 }
 782
 783                 /* Get list of sam groups */
 784
 785                 ZERO_STRUCT(groups);
 786                 groups.domain = domain;
 787
 788                 /*
 789                  * iterate through all groups
 790                  * total_entries          :  maintains a total count over **all domains**
 791                  * num_domain_entries :  is the running count for this domain
 792                  */
 793
 794                 num_domain_entries = 0;
 795                 while (get_sam_group_entries(&groups))
 796                 {
 797                         int new_size;
 798                         int offset;
 799
 800                         offset = sizeof(struct acct_info) * num_domain_entries;
 801                         new_size = sizeof(struct acct_info)
 802                                 * (groups.num_sam_entries + num_domain_entries);
 803                         sam_entries = Realloc(sam_entries, new_size);
 804
 805                         if (!sam_entries)
 806                                 return WINBINDD_ERROR;
 807
 808                         num_domain_entries += groups.num_sam_entries;
 809                         memcpy (((char *)sam_entries)+offset, groups.sam_entries,
 810                                 sizeof(struct acct_info) * groups.num_sam_entries);
 811
 812                         groups.sam_entries = NULL;
 813                         groups.num_sam_entries = 0;
 814                 }
 815
 816                 /* skip remainder of loop if we idn;t retrieve any groups */
 817
 818                 if (num_domain_entries == 0)
 819                         continue;
 820
 821                 /* setup the groups struct to contain all the groups
 822                    retrieved for this domain */
 823
 824                 groups.num_sam_entries = num_domain_entries;
 825                 groups.sam_entries = sam_entries;
 826
 827                 /* keep track the of the total number of groups seen so
 828                    far over all domains */
 829
 830                 total_entries += groups.num_sam_entries;
 831
 832                 /* Allocate some memory for extra data.  Note that we limit
 833                    account names to sizeof(fstring) = 128 characters.  */
 834
 835                 ted = Realloc(extra_data, sizeof(fstring) * total_entries);
 836
 837                 if (!ted) {
 838                         DEBUG(0,("winbindd_list_groups: failed to enlarge buffer!\n"));
 839                         SAFE_FREE(extra_data);
 840                         return WINBINDD_ERROR;
 841                 } else
 842                         extra_data = ted;
 843
 844                 /* Pack group list into extra data fields */
 845
 846                 for (i = 0; i < groups.num_sam_entries; i++) {
 847                         char *group_name = ((struct acct_info *)
 848                                             groups.sam_entries)[i].acct_name;
 849                         fstring name;
 850
 851                         /* Convert unistring to ascii */
 852
 853                         snprintf(name, sizeof(name), "%s%s%s", domain->name,
 854                                 lp_winbind_separator(), group_name);
 855
 856                         /* Append to extra data */
 857
 858                         memcpy(&extra_data[extra_data_len], name, strlen(name));
 859                         extra_data_len += strlen(name);
 860
 861                         extra_data[extra_data_len++] = ',';
 862                 }
 863         }
 864
 865         /* Assign extra_data fields in response structure */
 866
 867         if (extra_data) {
 868                 extra_data[extra_data_len - 1] = '\0';
 869                 state->response.extra_data = extra_data;
 870                 state->response.length += extra_data_len;
 871         }
 872
 873         /* No domains may have responded but that's still OK so don't
 874            return an error. */
 875
 876         return WINBINDD_OK;
 877 }
 878
 879 /* Get user supplementary groups.  This is much quicker than trying to
 880    invert the groups database. */
 881
 882 enum winbindd_result winbindd_getgroups(struct winbindd_cli_state *state)
 883 {
 884         fstring name_domain, name_user, name;
 885         DOM_SID user_sid;
 886         enum SID_NAME_USE name_type;
 887         uint32 user_rid, num_groups, num_gids;
 888         DOM_GID *user_groups = NULL;
 889         struct winbindd_domain *domain;
 890         enum winbindd_result result;
 891         gid_t *gid_list;
 892         int i;
 893
 894         DEBUG(3, ("[%5d]: getgroups %s\n", state->pid,
 895                   state->request.data.username));
 896
 897         if (state == NULL) return WINBINDD_ERROR;
 898
 899         /* Parse domain and username */
 900
 901         parse_domain_user(state->request.data.username, name_domain,
 902                           name_user);
 903
 904         /* Reject names that don't have a domain - i.e name_domain contains
 905            the entire name. */
 906
 907         if (strequal(name_domain, "")) {
 908                 return WINBINDD_ERROR;
 909         }
 910
 911         /* Get info for the domain */
 912
 913         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 914                 DEBUG(0, ("could not find domain entry for domain %s\n",
 915                           name_domain));
 916                 return WINBINDD_ERROR;
 917         }
 918
 919         if (!domain_handles_open(domain)) {
 920                 return WINBINDD_ERROR;
 921         }
 922
 923         slprintf(name, sizeof(name) - 1, "%s\\%s", name_domain, name_user);
 924
 925         /* Get rid and name type from name.  The following costs 1 packet */
 926
 927         if (!winbindd_lookup_sid_by_name(name, &user_sid, &name_type)) {
 928                 DEBUG(1, ("user '%s' does not exist\n", name_user));
 929                 return WINBINDD_ERROR;
 930         }
 931
 932         if (name_type != SID_NAME_USER) {
 933                 DEBUG(1, ("name '%s' is not a user name: %d\n", name_user,
 934                           name_type));
 935                 return WINBINDD_ERROR;
 936         }
 937
 938         sid_split_rid(&user_sid, &user_rid);
 939
 940         if (!winbindd_lookup_usergroups(domain, user_rid, &num_groups,
 941                                         &user_groups)) {
 942                 return WINBINDD_ERROR;
 943         }
 944
 945         /* Copy data back to client */
 946
 947         num_gids = 0;
 948         gid_list = malloc(sizeof(gid_t) * num_groups);
 949
 950         if (state->response.extra_data) {
 951                 result = WINBINDD_ERROR;
 952                 goto done;
 953         }
 954
 955         for (i = 0; i < num_groups; i++) {
 956                 if (!winbindd_idmap_get_gid_from_rid(
 957                         domain->name, user_groups[i].g_rid,
 958                         &gid_list[num_gids])) {
 959
 960                         DEBUG(1, ("unable to convert group rid %d to gid\n",
 961                                   user_groups[i].g_rid));
 962                         continue;
 963                 }
 964
 965                 num_gids++;
 966         }
 967
 968         state->response.data.num_entries = num_gids;
 969         state->response.extra_data = gid_list;
 970         state->response.length += num_gids * sizeof(gid_t);
 971
 972         result = WINBINDD_OK;
 973
 974  done:
 975         SAFE_FREE(user_groups);
 976
 977         return result;
 978 }