source/nsswitch/winbindd_group.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 2.2.
   4
   5    Winbind daemon for ntdom nss module
   6
   7    Copyright (C) Tim Potter 2000
   8    Copyright (C) Jeremy Allison 2001.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "winbindd.h"
  26
  27 /***************************************************************
  28  Empty static struct for negative caching.
  29 ****************************************************************/
  30
  31 static struct winbindd_gr negative_gr_cache_entry;
  32
  33 /* Fill a grent structure from various other information */
  34
  35 static BOOL fill_grent(struct winbindd_gr *gr, char *gr_name,
  36                        gid_t unix_gid)
  37 {
  38         /* Fill in uid/gid */
  39
  40         gr->gr_gid = unix_gid;
  41
  42         /* Group name and password */
  43
  44         safe_strcpy(gr->gr_name, gr_name, sizeof(gr->gr_name) - 1);
  45         safe_strcpy(gr->gr_passwd, "x", sizeof(gr->gr_passwd) - 1);
  46
  47         return True;
  48 }
  49
  50 /* Fill in the group membership field of a NT group given by group_rid */
  51
  52 static BOOL fill_grent_mem(struct winbindd_domain *domain,
  53                            uint32 group_rid,
  54                            enum SID_NAME_USE group_name_type,
  55                            int *num_gr_mem, char **gr_mem, int *gr_mem_len)
  56 {
  57         uint32 *rid_mem = NULL, num_names = 0;
  58         uint32 *name_types = NULL;
  59         int buf_len, buf_ndx, i;
  60         char **names = NULL, *buf;
  61         BOOL result = False;
  62         TALLOC_CTX *mem_ctx;
  63
  64         if (!(mem_ctx = talloc_init()))
  65                 return False;
  66
  67         /* Initialise group membership information */
  68
  69         DEBUG(10, ("fill_grent_mem(): group %s rid 0x%x\n",
  70                    domain ? domain->name : "NULL", group_rid));
  71
  72         *num_gr_mem = 0;
  73
  74         if (group_name_type != SID_NAME_DOM_GRP) {
  75                 DEBUG(1, ("fill_grent_mem(): rid %d in domain %s isn't a "
  76                           "domain group\n", group_rid, domain->name));
  77                 goto done;
  78         }
  79
  80         /* Lookup group members */
  81
  82         if (!winbindd_lookup_groupmem(domain, mem_ctx, group_rid, &num_names,
  83                                       &rid_mem, &names, &name_types)) {
  84
  85                 DEBUG(1, ("fill_grent_mem(): could not lookup membership "
  86                           "for group rid %d in domain %s\n",
  87                           group_rid, domain->name));
  88
  89                 goto done;
  90         }
  91
  92         DEBUG(10, ("fill_grent_mem(): looked up %d names\n", num_names));
  93
  94         if (DEBUGLEVEL >= 10) {
  95                 for (i = 0; i < num_names; i++)
  96                         DEBUG(10, ("\t%20s %x %d\n", names[i], rid_mem[i],
  97                                    name_types[i]));
  98         }
  99
 100         /* Add members to list */
 101
 102         buf = NULL;
 103         buf_len = buf_ndx = 0;
 104
 105  again:
 106
 107         for (i = 0; i < num_names; i++) {
 108                 char *the_name;
 109                 fstring name;
 110                 int len;
 111
 112                 the_name = names[i];
 113
 114                 DEBUG(10, ("fill_grent_mem(): processing name %s\n",
 115                            the_name));
 116
 117                 /* FIXME: need to cope with groups within groups.  These
 118                    occur in Universal groups on a Windows 2000 native mode
 119                    server. */
 120
 121                 if (name_types[i] != SID_NAME_USER) {
 122                         DEBUG(3, ("fill_grent_mem(): name %s isn't a domain "
 123                                   "user\n", the_name));
 124                         continue;
 125                 }
 126
 127                 /* Don't bother with machine accounts */
 128
 129                 if (the_name[strlen(the_name) - 1] == '$') {
 130                         DEBUG(10, ("fill_grent_mem(): %s is machine account\n",
 131                                    the_name));
 132                         continue;
 133                 }
 134
 135                 /* Append domain name */
 136
 137                 snprintf(name, sizeof(name), "%s%s%s", domain->name,
 138                          lp_winbind_separator(), the_name);
 139
 140                 len = strlen(name);
 141
 142                 /* Add to list or calculate buffer length */
 143
 144                 if (!buf) {
 145                         buf_len += len + 1; /* List is comma separated */
 146                         (*num_gr_mem)++;
 147                         DEBUG(10, ("fill_grent_mem(): buf_len + %d = %d\n", len + 1,
 148                                    buf_len));
 149                 } else {
 150                         DEBUG(10, ("fill_grent_mem(): appending %s at index %d\n",
 151                                    name, len));
 152                         safe_strcpy(&buf[buf_ndx], name, len);
 153                         buf_ndx += len;
 154                         buf[buf_ndx] = ',';
 155                         buf_ndx++;
 156                 }
 157         }
 158
 159         /* Allocate buffer */
 160
 161         if (!buf) {
 162                 if (!(buf = malloc(buf_len))) {
 163                         DEBUG(1, ("fill_grent_mem(): out of memory\n"));
 164                         result = False;
 165                         goto done;
 166                 }
 167                 memset(buf, 0, buf_len);
 168                 goto again;
 169         }
 170
 171         if (buf && buf_ndx > 0) {
 172                 buf[buf_ndx - 1] = '\0';
 173         }
 174
 175         *gr_mem = buf;
 176         *gr_mem_len = buf_len;
 177
 178         DEBUG(10, ("fill_grent_mem(): num_mem = %d, len = %d, mem = %s\n",
 179                    *num_gr_mem, buf_len, num_gr_mem ? buf : "NULL"));
 180
 181         result = True;
 182
 183 done:
 184
 185         talloc_destroy(mem_ctx);
 186
 187         DEBUG(10, ("fill_grent_mem(): returning %d\n", result));
 188
 189         return result;
 190 }
 191
 192 /* Return a group structure from a group name */
 193
 194 enum winbindd_result winbindd_getgrnam_from_group(struct winbindd_cli_state *state)
 195 {
 196         DOM_SID group_sid;
 197         struct winbindd_domain *domain;
 198         enum SID_NAME_USE name_type;
 199         uint32 group_rid;
 200         fstring name_domain, name_group, name;
 201         char *tmp, *gr_mem;
 202         gid_t gid;
 203         int extra_data_len, gr_mem_len;
 204
 205         DEBUG(3, ("[%5d]: getgrnam %s\n", state->pid,
 206                   state->request.data.groupname));
 207
 208         /* Parse domain and groupname */
 209
 210         memset(name_group, 0, sizeof(fstring));
 211
 212         tmp = state->request.data.groupname;
 213         if (!parse_domain_user(tmp, name_domain, name_group))
 214                 return WINBINDD_ERROR;
 215
 216         /* Get info for the domain */
 217
 218         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 219                 DEBUG(0, ("getgrname_from_group(): could not get domain "
 220                           "sid for domain %s\n", name_domain));
 221                 return WINBINDD_ERROR;
 222         }
 223
 224         /* Check for cached group entry */
 225
 226         if (winbindd_fetch_group_cache_entry(domain, name_group,
 227                                              &state->response.data.gr,
 228                                              &state->response.extra_data,
 229                                              &extra_data_len)) {
 230
 231                 /* Check if this is a negative cache entry. */
 232
 233                 if (memcmp(&negative_gr_cache_entry, &state->response.data.gr,
 234                                 sizeof(state->response.data.gr)) == 0)
 235             return WINBINDD_ERROR;
 236
 237                 state->response.length += extra_data_len;
 238                 return WINBINDD_OK;
 239         }
 240
 241         snprintf(name, sizeof(name), "%s\\%s", name_domain, name_group);
 242
 243         /* Get rid and name type from name */
 244
 245         if (!winbindd_lookup_sid_by_name(name, &group_sid, &name_type)) {
 246                 DEBUG(1, ("group %s in domain %s does not exist\n",
 247                           name_group, name_domain));
 248
 249                 winbindd_store_group_cache_entry(domain, name_group,
 250                                          &negative_gr_cache_entry, NULL, 0);
 251
 252                 return WINBINDD_ERROR;
 253         }
 254
 255         if ((name_type != SID_NAME_ALIAS) && (name_type != SID_NAME_DOM_GRP)) {
 256                 DEBUG(1, ("from_group: name '%s' is not a local or domain "
 257                           "group: %d\n", name_group, name_type));
 258
 259                 winbindd_store_group_cache_entry(domain, name_group,
 260                                          &negative_gr_cache_entry, NULL, 0);
 261
 262                 return WINBINDD_ERROR;
 263         }
 264
 265         /* Fill in group structure */
 266
 267         sid_split_rid(&group_sid, &group_rid);
 268
 269         if (!winbindd_idmap_get_gid_from_rid(domain->name, group_rid, &gid)) {
 270                 DEBUG(1, ("error sursing unix gid for sid\n"));
 271
 272                 winbindd_store_group_cache_entry(domain, name_group,
 273                                          &negative_gr_cache_entry, NULL, 0);
 274
 275                 return WINBINDD_ERROR;
 276         }
 277
 278         if (!fill_grent(&state->response.data.gr,
 279                         state->request.data.groupname, gid) ||
 280             !fill_grent_mem(domain, group_rid, name_type,
 281                             &state->response.data.gr.num_gr_mem,
 282                             &gr_mem, &gr_mem_len)) {
 283
 284                 winbindd_store_group_cache_entry(domain, name_group,
 285                                          &negative_gr_cache_entry, NULL, 0);
 286
 287                 return WINBINDD_ERROR;
 288         }
 289
 290         /* Group membership lives at start of extra data */
 291
 292         state->response.data.gr.gr_mem_ofs = 0;
 293
 294         state->response.length += gr_mem_len;
 295         state->response.extra_data = gr_mem;
 296
 297         /* Update cached group info */
 298
 299         winbindd_store_group_cache_entry(domain, name_group,
 300                                          &state->response.data.gr,
 301                                          state->response.extra_data,
 302                                          gr_mem_len);
 303
 304         return WINBINDD_OK;
 305 }
 306
 307 /* Return a group structure from a gid number */
 308
 309 enum winbindd_result winbindd_getgrnam_from_gid(struct winbindd_cli_state
 310                                                 *state)
 311 {
 312         struct winbindd_domain *domain;
 313         DOM_SID group_sid;
 314         enum SID_NAME_USE name_type;
 315         fstring group_name;
 316         uint32 group_rid;
 317         int extra_data_len, gr_mem_len;
 318         char *gr_mem;
 319
 320         DEBUG(3, ("[%5d]: getgrgid %d\n", state->pid,
 321                   state->request.data.gid));
 322
 323         /* Bug out if the gid isn't in the winbind range */
 324
 325         if ((state->request.data.gid < server_state.gid_low) ||
 326             (state->request.data.gid > server_state.gid_high))
 327                 return WINBINDD_ERROR;
 328
 329         /* Get rid from gid */
 330
 331         if (!winbindd_idmap_get_rid_from_gid(state->request.data.gid,
 332                                              &group_rid, &domain)) {
 333                 DEBUG(1, ("Could not convert gid %d to rid\n",
 334                           state->request.data.gid));
 335                 return WINBINDD_ERROR;
 336         }
 337
 338         /* Try a cached entry */
 339
 340         if (winbindd_fetch_gid_cache_entry(domain,
 341                                            state->request.data.gid,
 342                                            &state->response.data.gr,
 343                                            &state->response.extra_data,
 344                                            &extra_data_len)) {
 345
 346                 /* Check if this is a negative cache entry. */
 347
 348                 if (memcmp(&negative_gr_cache_entry, &state->response.data.gr,
 349                                 sizeof(state->response.data.gr)) == 0)
 350                         return WINBINDD_ERROR;
 351
 352                 state->response.length += extra_data_len;
 353                 return WINBINDD_OK;
 354         }
 355
 356         /* Get sid from gid */
 357
 358         sid_copy(&group_sid, &domain->sid);
 359         sid_append_rid(&group_sid, group_rid);
 360
 361         if (!winbindd_lookup_name_by_sid(&group_sid, group_name, &name_type)) {
 362                 DEBUG(1, ("Could not lookup sid\n"));
 363                 return WINBINDD_ERROR;
 364         }
 365
 366         if (strcmp(lp_winbind_separator(),"\\"))
 367                 string_sub(group_name, "\\", lp_winbind_separator(),
 368                            sizeof(fstring));
 369
 370         if (!((name_type == SID_NAME_ALIAS) ||
 371               (name_type == SID_NAME_DOM_GRP))) {
 372                 DEBUG(1, ("from_gid: name '%s' is not a local or domain "
 373                           "group: %d\n", group_name, name_type));
 374                 return WINBINDD_ERROR;
 375         }
 376
 377         /* Fill in group structure */
 378
 379         if (!fill_grent(&state->response.data.gr, group_name,
 380                         state->request.data.gid) ||
 381             !fill_grent_mem(domain, group_rid, name_type,
 382                             &state->response.data.gr.num_gr_mem,
 383                             &gr_mem, &gr_mem_len))
 384                 return WINBINDD_ERROR;
 385
 386         /* Group membership lives at start of extra data */
 387
 388         state->response.data.gr.gr_mem_ofs = 0;
 389
 390         state->response.length += gr_mem_len;
 391         state->response.extra_data = gr_mem;
 392
 393         /* Update cached group info */
 394
 395         winbindd_store_gid_cache_entry(domain, state->request.data.gid,
 396                                        &state->response.data.gr,
 397                                        state->response.extra_data,
 398                                        gr_mem_len);
 399
 400         return WINBINDD_OK;
 401 }
 402
 403 /*
 404  * set/get/endgrent functions
 405  */
 406
 407 /* "Rewind" file pointer for group database enumeration */
 408
 409 enum winbindd_result winbindd_setgrent(struct winbindd_cli_state *state)
 410 {
 411         struct winbindd_domain *tmp;
 412
 413         DEBUG(3, ("[%5d]: setgrent\n", state->pid));
 414
 415         /* Check user has enabled this */
 416
 417         if (!lp_winbind_enum_groups())
 418                 return WINBINDD_ERROR;
 419
 420         /* Free old static data if it exists */
 421
 422         if (state->getgrent_state != NULL) {
 423                 free_getent_state(state->getgrent_state);
 424                 state->getgrent_state = NULL;
 425         }
 426
 427         /* Create sam pipes for each domain we know about */
 428
 429         if (domain_list == NULL)
 430                 get_domain_info();
 431
 432         for (tmp = domain_list; tmp != NULL; tmp = tmp->next) {
 433                 struct getent_state *domain_state;
 434
 435                 /* Skip domains other than WINBINDD_DOMAIN environment
 436                    variable */
 437
 438                 if ((strcmp(state->request.domain, "") != 0) &&
 439                     !check_domain_env(state->request.domain, tmp->name)) {
 440                         DEBUG(5, ("skipping domain %s because of env var\n",
 441                                   tmp->name));
 442                         continue;
 443                 }
 444
 445                 /* Create a state record for this domain */
 446                 if ((domain_state = create_getent_state(tmp)) == NULL) {
 447                         DEBUG(5, ("error connecting to dc for domain %s\n",
 448                                   tmp->name));
 449                         continue;
 450                 }
 451
 452                 /* Add to list of open domains */
 453
 454                 DLIST_ADD(state->getgrent_state, domain_state);
 455         }
 456
 457         return WINBINDD_OK;
 458 }
 459
 460 /* Close file pointer to ntdom group database */
 461
 462 enum winbindd_result winbindd_endgrent(struct winbindd_cli_state *state)
 463 {
 464         DEBUG(3, ("[%5d]: endgrent\n", state->pid));
 465
 466         free_getent_state(state->getgrent_state);
 467         state->getgrent_state = NULL;
 468
 469         return WINBINDD_OK;
 470 }
 471
 472 /* Get the list of domain groups and domain aliases for a domain.  We fill in
 473    the sam_entries and num_sam_entries fields with domain group information.
 474    The dispinfo_ndx field is incremented to the index of the next group to
 475    fetch. Return True if some groups were returned, False otherwise. */
 476
 477 #define MAX_FETCH_SAM_ENTRIES 100
 478
 479 static BOOL get_sam_group_entries(struct getent_state *ent)
 480 {
 481         NTSTATUS status;
 482         uint32 num_entries;
 483         struct acct_info *name_list = NULL, *tnl;
 484         TALLOC_CTX *mem_ctx;
 485         BOOL result = False;
 486
 487         if (ent->got_all_sam_entries)
 488                 return False;
 489
 490 #if 0
 491         if (winbindd_fetch_group_cache(ent->domain,
 492                                        &ent->sam_entries,
 493                                        &ent->num_sam_entries))
 494                 return True;
 495 #endif
 496
 497         if (!(mem_ctx = talloc_init()))
 498                 return False;
 499
 500         /* Free any existing group info */
 501
 502         SAFE_FREE(ent->sam_entries);
 503         ent->num_sam_entries = 0;
 504
 505         /* Enumerate domain groups */
 506
 507         do {
 508                 struct acct_info *sam_grp_entries = NULL;
 509                 CLI_POLICY_HND *hnd;
 510
 511                 num_entries = 0;
 512
 513                 if (!(hnd = cm_get_sam_handle(ent->domain->name)))
 514                         break;
 515
 516                 status = cli_samr_enum_dom_groups(
 517                                                 hnd->cli, mem_ctx, &ent->dom_pol,
 518                                                 &ent->grp_query_start_ndx,
 519                                                 0x8000, /* buffer size? */
 520                                                 (struct acct_info **) &sam_grp_entries, &num_entries);
 521
 522                 /* Copy entries into return buffer */
 523
 524                 if (num_entries) {
 525
 526                         tnl = Realloc(name_list,
 527                                     sizeof(struct acct_info) *
 528                                     (ent->num_sam_entries +
 529                                      num_entries));
 530
 531                         if (tnl == NULL) {
 532                                 DEBUG(0,("get_sam_group_entries: unable to "
 533                                          "realloc a structure!\n"));
 534                                 SAFE_FREE(name_list);
 535
 536                                 goto done;
 537                         } else
 538                                 name_list = tnl;
 539
 540                         memcpy(&name_list[ent->num_sam_entries],
 541                                sam_grp_entries,
 542                                num_entries * sizeof(struct acct_info));
 543                 }
 544
 545                 ent->num_sam_entries += num_entries;
 546
 547                 if (NT_STATUS_V(status) != NT_STATUS_V(STATUS_MORE_ENTRIES))
 548                         break;
 549
 550         } while (ent->num_sam_entries < MAX_FETCH_SAM_ENTRIES);
 551
 552 #if 0
 553         /* Fill cache with received entries */
 554
 555         winbindd_store_group_cache(ent->domain, ent->sam_entries,
 556                                    ent->num_sam_entries);
 557 #endif
 558
 559         /* Fill in remaining fields */
 560
 561         ent->sam_entries = name_list;
 562         ent->sam_entry_index = 0;
 563         ent->got_all_sam_entries = (NT_STATUS_V(status) !=
 564                                     NT_STATUS_V(STATUS_MORE_ENTRIES));
 565
 566         result = (ent->num_sam_entries > 0);
 567
 568  done:
 569
 570         talloc_destroy(mem_ctx);
 571
 572         return result;
 573 }
 574
 575 /* Fetch next group entry from ntdom database */
 576
 577 #define MAX_GETGRENT_GROUPS 500
 578
 579 enum winbindd_result winbindd_getgrent(struct winbindd_cli_state *state)
 580 {
 581         struct getent_state *ent;
 582         struct winbindd_gr *group_list = NULL;
 583         int num_groups, group_list_ndx = 0, i, gr_mem_list_len = 0;
 584         char *new_extra_data, *gr_mem_list = NULL;
 585
 586         DEBUG(3, ("[%5d]: getgrent\n", state->pid));
 587
 588         /* Check user has enabled this */
 589
 590         if (!lp_winbind_enum_groups())
 591                 return WINBINDD_ERROR;
 592
 593         num_groups = MIN(MAX_GETGRENT_GROUPS, state->request.data.num_entries);
 594
 595         if ((state->response.extra_data =
 596              malloc(num_groups * sizeof(struct winbindd_gr))) == NULL)
 597                 return WINBINDD_ERROR;
 598
 599         state->response.data.num_entries = 0;
 600
 601         group_list = (struct winbindd_gr *)state->response.extra_data;
 602
 603         if (!(ent = state->getgrent_state))
 604                 return WINBINDD_ERROR;
 605
 606         /* Start sending back groups */
 607
 608         for (i = 0; i < num_groups; i++) {
 609                 struct acct_info *name_list = NULL;
 610                 fstring domain_group_name;
 611                 uint32 result;
 612                 gid_t group_gid;
 613                 int gr_mem_len;
 614                 char *gr_mem, *new_gr_mem_list;
 615
 616                 /* Do we need to fetch another chunk of groups? */
 617
 618         tryagain:
 619
 620                 DEBUG(10, ("getgrent(): entry_index = %d, num_entries = %d\n",
 621                            ent->sam_entry_index, ent->num_sam_entries));
 622
 623                 if (ent->num_sam_entries == ent->sam_entry_index) {
 624
 625                         while(ent && !get_sam_group_entries(ent)) {
 626                                 struct getent_state *next_ent;
 627
 628                                 DEBUG(10, ("getgrent(): freeing state info for "
 629                                            "domain %s\n", ent->domain->name));
 630
 631                                 /* Free state information for this domain */
 632
 633                                 SAFE_FREE(ent->sam_entries);
 634
 635                                 next_ent = ent->next;
 636                                 DLIST_REMOVE(state->getgrent_state, ent);
 637
 638                                 SAFE_FREE(ent);
 639                                 ent = next_ent;
 640                         }
 641
 642                         /* No more domains */
 643
 644                         if (!ent)
 645                                 break;
 646                 }
 647
 648                 name_list = ent->sam_entries;
 649
 650                 /* Lookup group info */
 651
 652                 if (!winbindd_idmap_get_gid_from_rid(
 653                         ent->domain->name,
 654                         name_list[ent->sam_entry_index].rid,
 655                         &group_gid)) {
 656
 657                         DEBUG(1, ("getgrent(): could not look up gid for group %s\n",
 658                                   name_list[ent->sam_entry_index].acct_name));
 659
 660                         ent->sam_entry_index++;
 661                         goto tryagain;
 662                 }
 663
 664                 DEBUG(10, ("getgrent(): got gid %d for group %x\n", group_gid,
 665                            name_list[ent->sam_entry_index].rid));
 666
 667                 /* Fill in group entry */
 668
 669                 slprintf(domain_group_name, sizeof(domain_group_name) - 1,
 670                          "%s%s%s", ent->domain->name, lp_winbind_separator(),
 671                          name_list[ent->sam_entry_index].acct_name);
 672
 673                 result = fill_grent(&group_list[group_list_ndx],
 674                                     domain_group_name, group_gid);
 675
 676                 /* Fill in group membership entry */
 677
 678                 if (result) {
 679
 680                         /* Get group membership */
 681
 682                         result = fill_grent_mem(
 683                                 ent->domain,
 684                                 name_list[ent->sam_entry_index].rid,
 685                                 SID_NAME_DOM_GRP,
 686                                 &group_list[group_list_ndx].num_gr_mem,
 687                                 &gr_mem, &gr_mem_len);
 688                 }
 689
 690                 if (result) {
 691                         /* Append to group membership list */
 692
 693                         new_gr_mem_list = Realloc(
 694                                 gr_mem_list,
 695                                 gr_mem_list_len + gr_mem_len);
 696
 697                         if (!new_gr_mem_list && (group_list[group_list_ndx].num_gr_mem != 0)) {
 698                                 DEBUG(0, ("getgrent(): out of memory\n"));
 699                                 SAFE_FREE(gr_mem_list);
 700                                 gr_mem_list_len = 0;
 701                                 break;
 702                         }
 703
 704                         DEBUG(10, ("getgrent(): list_len = %d, mem_len = %d\n",
 705                                    gr_mem_list_len, gr_mem_len));
 706
 707                         gr_mem_list = new_gr_mem_list;
 708
 709                         memcpy(&gr_mem_list[gr_mem_list_len], gr_mem,
 710                                gr_mem_len);
 711
 712                         SAFE_FREE(gr_mem);
 713
 714                         group_list[group_list_ndx].gr_mem_ofs =
 715                                 gr_mem_list_len;
 716
 717                         gr_mem_list_len += gr_mem_len;
 718                 }
 719
 720                 ent->sam_entry_index++;
 721
 722                 /* Add group to return list */
 723
 724                 if (result) {
 725
 726                         DEBUG(10, ("getgrent(): adding group num_entries = %d\n",
 727                                    state->response.data.num_entries));
 728
 729                         group_list_ndx++;
 730                         state->response.data.num_entries++;
 731
 732                         state->response.length +=
 733                                 sizeof(struct winbindd_gr);
 734
 735                 } else {
 736                         DEBUG(0, ("could not lookup domain group %s\n",
 737                                   domain_group_name));
 738                 }
 739         }
 740
 741         /* Copy the list of group memberships to the end of the extra data */
 742
 743         if (group_list_ndx == 0)
 744                 goto done;
 745
 746         new_extra_data = Realloc(
 747                 state->response.extra_data,
 748                 group_list_ndx * sizeof(struct winbindd_gr) + gr_mem_list_len);
 749
 750         if (!new_extra_data) {
 751                 DEBUG(0, ("out of memory\n"));
 752                 group_list_ndx = 0;
 753                 SAFE_FREE(state->response.extra_data);
 754                 SAFE_FREE(gr_mem_list);
 755
 756                 return WINBINDD_ERROR;
 757         }
 758
 759         state->response.extra_data = new_extra_data;
 760
 761         memcpy(&((char *)state->response.extra_data)
 762                [group_list_ndx * sizeof(struct winbindd_gr)],
 763                gr_mem_list, gr_mem_list_len);
 764
 765         SAFE_FREE(gr_mem_list);
 766
 767         state->response.length += gr_mem_list_len;
 768
 769         DEBUG(10, ("getgrent(): returning %d groups, length = %d\n",
 770                    group_list_ndx, gr_mem_list_len));
 771
 772         /* Out of domains */
 773
 774  done:
 775
 776         return (group_list_ndx > 0) ? WINBINDD_OK : WINBINDD_ERROR;
 777 }
 778
 779 /* List domain groups without mapping to unix ids */
 780
 781 enum winbindd_result winbindd_list_groups(struct winbindd_cli_state *state)
 782 {
 783         uint32 total_entries = 0;
 784         uint32 num_domain_entries;
 785         struct winbindd_domain *domain;
 786         struct getent_state *groups;
 787         char *extra_data = NULL;
 788         char *ted = NULL;
 789         int extra_data_len = 0, i;
 790         void *sam_entries = NULL;
 791
 792         DEBUG(3, ("[%5d]: list groups\n", state->pid));
 793
 794         /* Enumerate over trusted domains */
 795
 796         ZERO_STRUCT(groups);
 797
 798         if (domain_list == NULL)
 799                 get_domain_info();
 800
 801         for (domain = domain_list; domain; domain = domain->next) {
 802
 803                 /* Skip domains other than WINBINDD_DOMAIN environment
 804                    variable */
 805
 806                 if ((strcmp(state->request.domain, "") != 0) &&
 807                     !check_domain_env(state->request.domain, domain->name))
 808                         continue;
 809
 810                 /* Get list of sam groups */
 811
 812                 if ((groups = create_getent_state(domain)) == NULL)
 813                         continue;
 814
 815                 /*
 816                  * iterate through all groups
 817                  * total_entries:  maintains a total count over **all domains**
 818                  * num_domain_entries:  is the running count for this domain
 819                  */
 820
 821                 num_domain_entries = 0;
 822
 823                 while (get_sam_group_entries(groups)) {
 824                         int new_size;
 825                         int offset;
 826
 827                         offset = sizeof(struct acct_info) * num_domain_entries;
 828                         new_size = sizeof(struct acct_info)
 829                                 * (groups->num_sam_entries + num_domain_entries);
 830                         sam_entries = Realloc(sam_entries, new_size);
 831
 832                         if (!sam_entries) {
 833                                 free_getent_state(groups);
 834                                 return WINBINDD_ERROR;
 835                         }
 836                         num_domain_entries += groups->num_sam_entries;
 837                         memcpy (((char *)sam_entries)+offset,
 838                                 groups->sam_entries,
 839                                 sizeof(struct acct_info) *
 840                                 groups->num_sam_entries);
 841
 842                         SAFE_FREE(groups->sam_entries);
 843                         groups->num_sam_entries = 0;
 844                 }
 845
 846                 /* skip remainder of loop if we idn;t retrieve any groups */
 847
 848                 if (num_domain_entries == 0)
 849                         continue;
 850
 851                 /* setup the groups struct to contain all the groups
 852                    retrieved for this domain */
 853
 854                 groups->num_sam_entries = num_domain_entries;
 855                 groups->sam_entries = sam_entries;
 856
 857                 sam_entries = NULL;
 858
 859                 /* keep track the of the total number of groups seen so
 860                    far over all domains */
 861
 862                 total_entries += groups->num_sam_entries;
 863
 864                 /* Allocate some memory for extra data.  Note that we limit
 865                    account names to sizeof(fstring) = 128 characters.  */
 866
 867                 ted = Realloc(extra_data, sizeof(fstring) * total_entries);
 868
 869                 if (!ted) {
 870                         DEBUG(0,("winbindd_list_groups: failed to enlarge "
 871                                  "buffer!\n"));
 872                         SAFE_FREE(extra_data);
 873                         free_getent_state(groups);
 874                         return WINBINDD_ERROR;
 875                 } else
 876                         extra_data = ted;
 877
 878                 /* Pack group list into extra data fields */
 879
 880                 for (i = 0; i < groups->num_sam_entries; i++) {
 881                         char *group_name = ((struct acct_info *)
 882                                             groups->sam_entries)[i].acct_name;
 883                         fstring name;
 884
 885                         /* Convert unistring to ascii */
 886
 887                         snprintf(name, sizeof(name), "%s%s%s", domain->name,
 888                                 lp_winbind_separator(), group_name);
 889
 890                         /* Append to extra data */
 891
 892                         memcpy(&extra_data[extra_data_len], name,
 893                                strlen(name));
 894
 895                         extra_data_len += strlen(name);
 896
 897                         extra_data[extra_data_len++] = ',';
 898                 }
 899
 900                 free_getent_state(groups);
 901         }
 902
 903         /* Assign extra_data fields in response structure */
 904
 905         if (extra_data) {
 906                 extra_data[extra_data_len - 1] = '\0';
 907                 state->response.extra_data = extra_data;
 908                 state->response.length += extra_data_len;
 909         }
 910
 911         /* No domains may have responded but that's still OK so don't
 912            return an error. */
 913
 914         return WINBINDD_OK;
 915 }
 916
 917 /* Get user supplementary groups.  This is much quicker than trying to
 918    invert the groups database. */
 919
 920 enum winbindd_result winbindd_getgroups(struct winbindd_cli_state *state)
 921 {
 922         fstring name_domain, name_user, name;
 923         DOM_SID user_sid;
 924         enum SID_NAME_USE name_type;
 925         uint32 user_rid, num_groups, num_gids;
 926         DOM_GID *user_groups = NULL;
 927         struct winbindd_domain *domain;
 928         enum winbindd_result result = WINBINDD_ERROR;
 929         gid_t *gid_list;
 930         int i;
 931         TALLOC_CTX *mem_ctx;
 932
 933         DEBUG(3, ("[%5d]: getgroups %s\n", state->pid,
 934                   state->request.data.username));
 935
 936         if (!(mem_ctx = talloc_init()))
 937                 return WINBINDD_ERROR;
 938
 939         /* Parse domain and username */
 940
 941         if (!parse_domain_user(state->request.data.username, name_domain,
 942                           name_user))
 943                 goto done;
 944
 945         /* Get info for the domain */
 946
 947         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 948                 DEBUG(0, ("could not find domain entry for domain %s\n",
 949                           name_domain));
 950                 goto done;
 951         }
 952
 953         slprintf(name, sizeof(name) - 1, "%s\\%s", name_domain, name_user);
 954
 955         /* Get rid and name type from name.  The following costs 1 packet */
 956
 957         if (!winbindd_lookup_sid_by_name(name, &user_sid, &name_type)) {
 958                 DEBUG(1, ("user '%s' does not exist\n", name_user));
 959                 goto done;
 960         }
 961
 962         if (name_type != SID_NAME_USER) {
 963                 DEBUG(1, ("name '%s' is not a user name: %d\n", name_user,
 964                           name_type));
 965                 goto done;
 966         }
 967
 968         sid_split_rid(&user_sid, &user_rid);
 969
 970         if (!winbindd_lookup_usergroups(domain, mem_ctx, user_rid,
 971                                         &num_groups, &user_groups))
 972                 goto done;
 973
 974         /* Copy data back to client */
 975
 976         num_gids = 0;
 977         gid_list = malloc(sizeof(gid_t) * num_groups);
 978         if (gid_list == NULL)
 979                 goto done;
 980
 981         if (state->response.extra_data)
 982                 goto done;
 983
 984         for (i = 0; i < num_groups; i++) {
 985                 if (!winbindd_idmap_get_gid_from_rid(
 986                         domain->name, user_groups[i].g_rid,
 987                         &gid_list[num_gids])) {
 988
 989                         DEBUG(1, ("unable to convert group rid %d to gid\n",
 990                                   user_groups[i].g_rid));
 991                         continue;
 992                 }
 993
 994                 num_gids++;
 995         }
 996
 997         state->response.data.num_entries = num_gids;
 998         state->response.extra_data = gid_list;
 999         state->response.length += num_gids * sizeof(gid_t);
1000
1001         result = WINBINDD_OK;
1002
1003  done:
1004
1005         talloc_destroy(mem_ctx);
1006
1007         return result;
1008 }