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