source3/nsswitch/winbindd_group.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon for ntdom nss module
   5
   6    Copyright (C) Tim Potter 2000
   7    Copyright (C) Jeremy Allison 2001.
   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 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_WINBIND
  28
  29 /***************************************************************
  30  Empty static struct for negative caching.
  31 ****************************************************************/
  32
  33 /* Fill a grent structure from various other information */
  34
  35 static BOOL fill_grent(struct winbindd_gr *gr, const char *dom_name,
  36                        const char *gr_name, gid_t unix_gid)
  37 {
  38         fstring full_group_name;
  39         /* Fill in uid/gid */
  40         fill_domain_username(full_group_name, dom_name, gr_name);
  41
  42         gr->gr_gid = unix_gid;
  43
  44         /* Group name and password */
  45
  46         safe_strcpy(gr->gr_name, full_group_name, sizeof(gr->gr_name) - 1);
  47         safe_strcpy(gr->gr_passwd, "x", sizeof(gr->gr_passwd) - 1);
  48
  49         return True;
  50 }
  51
  52 /* Fill in the group membership field of a NT group given by group_rid */
  53
  54 static BOOL fill_grent_mem(struct winbindd_domain *domain,
  55                            uint32 group_rid,
  56                            enum SID_NAME_USE group_name_type,
  57                            int *num_gr_mem, char **gr_mem, int *gr_mem_len)
  58 {
  59         uint32 *rid_mem = NULL, num_names = 0;
  60         uint32 *name_types = NULL;
  61         int buf_len, buf_ndx, i;
  62         char **names = NULL, *buf;
  63         BOOL result = False;
  64         TALLOC_CTX *mem_ctx;
  65         NTSTATUS status;
  66
  67         if (!(mem_ctx = talloc_init_named("fill_grent_mem(%s)", domain->name)))
  68                 return False;
  69
  70         /* Initialise group membership information */
  71
  72         DEBUG(10, ("group %s rid 0x%x\n", domain ? domain->name : "NULL",
  73                    group_rid));
  74
  75         *num_gr_mem = 0;
  76
  77         if (group_name_type != SID_NAME_DOM_GRP) {
  78                 DEBUG(1, ("rid %d in domain %s isn't a domain group\n",
  79                           group_rid, domain->name));
  80                 goto done;
  81         }
  82
  83         /* Lookup group members */
  84         status = domain->methods->lookup_groupmem(domain, mem_ctx, group_rid, &num_names,
  85                                                   &rid_mem, &names, &name_types);
  86         if (!NT_STATUS_IS_OK(status)) {
  87                 DEBUG(1, ("could not lookup membership for group rid %d in domain %s (error: %s)\n",
  88                           group_rid, domain->name, nt_errstr(status)));
  89
  90                 goto done;
  91         }
  92
  93         DEBUG(10, ("looked up %d names\n", num_names));
  94
  95         if (DEBUGLEVEL >= 10) {
  96                 for (i = 0; i < num_names; i++)
  97                         DEBUG(10, ("\t%20s %x %d\n", names[i], rid_mem[i],
  98                                    name_types[i]));
  99         }
 100
 101         /* Add members to list */
 102
 103         buf = NULL;
 104         buf_len = buf_ndx = 0;
 105
 106  again:
 107
 108         for (i = 0; i < num_names; i++) {
 109                 char *the_name;
 110                 fstring name;
 111                 int len;
 112
 113                 the_name = names[i];
 114
 115                 DEBUG(10, ("processing name %s\n", 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, ("name %s isn't a domain user\n", the_name));
 123                         continue;
 124                 }
 125
 126                 /* Don't bother with machine accounts */
 127
 128                 if (the_name[strlen(the_name) - 1] == '$') {
 129                         DEBUG(10, ("%s is machine account\n", the_name));
 130                         continue;
 131                 }
 132
 133                 /* Append domain name */
 134
 135                 fill_domain_username(name, domain->name, the_name);
 136
 137                 len = strlen(name);
 138
 139                 /* Add to list or calculate buffer length */
 140
 141                 if (!buf) {
 142                         buf_len += len + 1; /* List is comma separated */
 143                         (*num_gr_mem)++;
 144                         DEBUG(10, ("buf_len + %d = %d\n", len + 1, buf_len));
 145                 } else {
 146                         DEBUG(10, ("appending %s at ndx %d\n", name, len));
 147                         safe_strcpy(&buf[buf_ndx], name, len);
 148                         buf_ndx += len;
 149                         buf[buf_ndx] = ',';
 150                         buf_ndx++;
 151                 }
 152         }
 153
 154         /* Allocate buffer */
 155
 156         if (!buf && buf_len != 0) {
 157                 if (!(buf = malloc(buf_len))) {
 158                         DEBUG(1, ("out of memory\n"));
 159                         result = False;
 160                         goto done;
 161                 }
 162                 memset(buf, 0, buf_len);
 163                 goto again;
 164         }
 165
 166         if (buf && buf_ndx > 0) {
 167                 buf[buf_ndx - 1] = '\0';
 168         }
 169
 170         *gr_mem = buf;
 171         *gr_mem_len = buf_len;
 172
 173         DEBUG(10, ("num_mem = %d, len = %d, mem = %s\n", *num_gr_mem,
 174                    buf_len, *num_gr_mem ? buf : "NULL"));
 175         result = True;
 176
 177 done:
 178
 179         talloc_destroy(mem_ctx);
 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(struct winbindd_cli_state *state)
 189 {
 190         DOM_SID group_sid;
 191         struct winbindd_domain *domain;
 192         enum SID_NAME_USE name_type;
 193         uint32 group_rid;
 194         fstring name_domain, name_group;
 195         char *tmp, *gr_mem;
 196         gid_t gid;
 197         int gr_mem_len;
 198
 199         DEBUG(3, ("[%5d]: getgrnam %s\n", state->pid,
 200                   state->request.data.groupname));
 201
 202         /* Parse domain and groupname */
 203
 204         memset(name_group, 0, sizeof(fstring));
 205
 206         tmp = state->request.data.groupname;
 207         if (!parse_domain_user(tmp, name_domain, name_group))
 208                 return WINBINDD_ERROR;
 209
 210         /* Get info for the domain */
 211
 212         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 213                 DEBUG(0, ("could not get domain sid for domain %s\n",
 214                           name_domain));
 215                 return WINBINDD_ERROR;
 216         }
 217
 218         /* Get rid and name type from name */
 219
 220         if (!winbindd_lookup_sid_by_name(domain, name_group, &group_sid,
 221                                          &name_type)) {
 222                 DEBUG(1, ("group %s in domain %s does not exist\n",
 223                           name_group, name_domain));
 224                 return WINBINDD_ERROR;
 225         }
 226
 227         if ((name_type != SID_NAME_ALIAS) && (name_type != SID_NAME_DOM_GRP)) {
 228                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n",
 229                           name_group, name_type));
 230                 return WINBINDD_ERROR;
 231         }
 232
 233         /* Fill in group structure */
 234         if (!sid_peek_check_rid(&domain->sid, &group_sid, &group_rid))
 235                 return WINBINDD_ERROR;
 236
 237         if (!winbindd_idmap_get_gid_from_sid(&group_sid, &gid)) {
 238                 DEBUG(1, ("error converting unix gid to sid\n"));
 239                 return WINBINDD_ERROR;
 240         }
 241
 242         if (!fill_grent(&state->response.data.gr, name_domain,
 243                         name_group, gid) ||
 244             !fill_grent_mem(domain, group_rid, name_type,
 245                             &state->response.data.gr.num_gr_mem,
 246                             &gr_mem, &gr_mem_len)) {
 247                 return WINBINDD_ERROR;
 248         }
 249
 250         /* Group membership lives at start of extra data */
 251
 252         state->response.data.gr.gr_mem_ofs = 0;
 253
 254         state->response.length += gr_mem_len;
 255         state->response.extra_data = gr_mem;
 256
 257         return WINBINDD_OK;
 258 }
 259
 260 /* Return a group structure from a gid number */
 261
 262 enum winbindd_result winbindd_getgrgid(struct winbindd_cli_state *state)
 263 {
 264         struct winbindd_domain *domain;
 265         DOM_SID group_sid;
 266         enum SID_NAME_USE name_type;
 267         fstring dom_name;
 268         fstring group_name;
 269         uint32 group_rid;
 270         int gr_mem_len;
 271         char *gr_mem;
 272
 273         DEBUG(3, ("[%5d]: getgrgid %d\n", state->pid,
 274                   state->request.data.gid));
 275
 276         /* Bug out if the gid isn't in the winbind range */
 277
 278         if ((state->request.data.gid < server_state.gid_low) ||
 279             (state->request.data.gid > server_state.gid_high))
 280                 return WINBINDD_ERROR;
 281
 282         /* Get rid from gid */
 283
 284         if (!winbindd_idmap_get_rid_from_gid(state->request.data.gid,
 285                                              &group_rid, &domain)) {
 286                 DEBUG(1, ("could not convert gid %d to rid\n",
 287                           state->request.data.gid));
 288                 return WINBINDD_ERROR;
 289         }
 290
 291         /* Get sid from gid */
 292
 293         sid_copy(&group_sid, &domain->sid);
 294         sid_append_rid(&group_sid, group_rid);
 295
 296         if (!winbindd_lookup_name_by_sid(&group_sid, dom_name, group_name, &name_type)) {
 297                 DEBUG(1, ("could not lookup sid\n"));
 298                 return WINBINDD_ERROR;
 299         }
 300
 301         if (!((name_type == SID_NAME_ALIAS) ||
 302               (name_type == SID_NAME_DOM_GRP))) {
 303                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n",
 304                           group_name, name_type));
 305                 return WINBINDD_ERROR;
 306         }
 307
 308         /* Fill in group structure */
 309
 310         if (!fill_grent(&state->response.data.gr, dom_name, group_name,
 311                         state->request.data.gid) ||
 312             !fill_grent_mem(domain, group_rid, name_type,
 313                             &state->response.data.gr.num_gr_mem,
 314                             &gr_mem, &gr_mem_len))
 315                 return WINBINDD_ERROR;
 316
 317         /* Group membership lives at start of extra data */
 318
 319         state->response.data.gr.gr_mem_ofs = 0;
 320
 321         state->response.length += gr_mem_len;
 322         state->response.extra_data = gr_mem;
 323
 324         return WINBINDD_OK;
 325 }
 326
 327 /*
 328  * set/get/endgrent functions
 329  */
 330
 331 /* "Rewind" file pointer for group database enumeration */
 332
 333 enum winbindd_result winbindd_setgrent(struct winbindd_cli_state *state)
 334 {
 335         struct winbindd_domain *domain;
 336
 337         DEBUG(3, ("[%5d]: setgrent\n", state->pid));
 338
 339         /* Check user has enabled this */
 340
 341         if (!lp_winbind_enum_groups())
 342                 return WINBINDD_ERROR;
 343
 344         /* Free old static data if it exists */
 345
 346         if (state->getgrent_state != NULL) {
 347                 free_getent_state(state->getgrent_state);
 348                 state->getgrent_state = NULL;
 349         }
 350
 351         /* Create sam pipes for each domain we know about */
 352
 353         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 354                 struct getent_state *domain_state;
 355
 356                 /* Skip domains other than WINBINDD_DOMAIN environment
 357                    variable */
 358
 359                 if ((strcmp(state->request.domain, "") != 0) &&
 360                     !check_domain_env(state->request.domain, domain->name))
 361                         continue;
 362
 363                 /* Create a state record for this domain */
 364
 365                 if ((domain_state = (struct getent_state *)
 366                      malloc(sizeof(struct getent_state))) == NULL) {
 367                         DEBUG(1, ("winbindd_setgrent: malloc failed for domain_state!\n"));
 368                         return WINBINDD_ERROR;
 369                 }
 370
 371                 ZERO_STRUCTP(domain_state);
 372
 373                 fstrcpy(domain_state->domain_name, domain->name);
 374
 375                 /* Add to list of open domains */
 376
 377                 DLIST_ADD(state->getgrent_state, domain_state);
 378         }
 379
 380         return WINBINDD_OK;
 381 }
 382
 383 /* Close file pointer to ntdom group database */
 384
 385 enum winbindd_result winbindd_endgrent(struct winbindd_cli_state *state)
 386 {
 387         DEBUG(3, ("[%5d]: endgrent\n", state->pid));
 388
 389         free_getent_state(state->getgrent_state);
 390         state->getgrent_state = NULL;
 391
 392         return WINBINDD_OK;
 393 }
 394
 395 /* Get the list of domain groups and domain aliases for a domain.  We fill in
 396    the sam_entries and num_sam_entries fields with domain group information.
 397    The dispinfo_ndx field is incremented to the index of the next group to
 398    fetch. Return True if some groups were returned, False otherwise. */
 399
 400 #define MAX_FETCH_SAM_ENTRIES 100
 401
 402 static BOOL get_sam_group_entries(struct getent_state *ent)
 403 {
 404         NTSTATUS status;
 405         uint32 num_entries;
 406         struct acct_info *name_list = NULL;
 407         TALLOC_CTX *mem_ctx;
 408         BOOL result = False;
 409         struct acct_info *sam_grp_entries = NULL;
 410         struct winbindd_domain *domain;
 411
 412         if (ent->got_sam_entries)
 413                 return False;
 414
 415         if (!(mem_ctx = talloc_init_named("get_sam_group_entries(%s)",
 416                                           ent->domain_name))) {
 417                 DEBUG(1, ("get_sam_group_entries: could not create talloc context!\n"));
 418                 return False;
 419         }
 420
 421         /* Free any existing group info */
 422
 423         SAFE_FREE(ent->sam_entries);
 424         ent->num_sam_entries = 0;
 425         ent->got_sam_entries = True;
 426
 427         /* Enumerate domain groups */
 428
 429         num_entries = 0;
 430
 431         if (!(domain = find_domain_from_name(ent->domain_name))) {
 432                 DEBUG(3, ("no such domain %s in get_sam_group_entries\n", ent->domain_name));
 433                 goto done;
 434         }
 435
 436         status = domain->methods->enum_dom_groups(domain,
 437                                                   mem_ctx,
 438                                                   &num_entries,
 439                                                   &sam_grp_entries);
 440
 441         if (!NT_STATUS_IS_OK(status)) {
 442                 DEBUG(3, ("get_sam_group_entries: could not enumerate domain groups! Error: %s", nt_errstr(status)));
 443                 result = False;
 444                 goto done;
 445         }
 446
 447         /* Copy entries into return buffer */
 448
 449         if (num_entries) {
 450                 name_list = malloc(sizeof(struct acct_info) * num_entries);
 451                 memcpy(name_list, sam_grp_entries,
 452                        num_entries * sizeof(struct acct_info));
 453         }
 454
 455         ent->num_sam_entries = num_entries;
 456
 457         /* Fill in remaining fields */
 458
 459         ent->sam_entries = name_list;
 460         ent->sam_entry_index = 0;
 461
 462         result = (ent->num_sam_entries > 0);
 463
 464  done:
 465         talloc_destroy(mem_ctx);
 466
 467         return result;
 468 }
 469
 470 /* Fetch next group entry from ntdom database */
 471
 472 #define MAX_GETGRENT_GROUPS 500
 473
 474 enum winbindd_result winbindd_getgrent(struct winbindd_cli_state *state)
 475 {
 476         struct getent_state *ent;
 477         struct winbindd_gr *group_list = NULL;
 478         int num_groups, group_list_ndx = 0, i, gr_mem_list_len = 0;
 479         char *new_extra_data, *gr_mem_list = NULL;
 480
 481         DEBUG(3, ("[%5d]: getgrent\n", state->pid));
 482
 483         /* Check user has enabled this */
 484
 485         if (!lp_winbind_enum_groups())
 486                 return WINBINDD_ERROR;
 487
 488         num_groups = MIN(MAX_GETGRENT_GROUPS, state->request.data.num_entries);
 489
 490         if ((state->response.extra_data =
 491              malloc(num_groups * sizeof(struct winbindd_gr))) == NULL)
 492                 return WINBINDD_ERROR;
 493
 494         state->response.data.num_entries = 0;
 495
 496         group_list = (struct winbindd_gr *)state->response.extra_data;
 497
 498         if (!(ent = state->getgrent_state))
 499                 return WINBINDD_ERROR;
 500
 501         /* Start sending back groups */
 502
 503         for (i = 0; i < num_groups; i++) {
 504                 struct acct_info *name_list = NULL;
 505                 fstring domain_group_name;
 506                 uint32 result;
 507                 gid_t group_gid;
 508                 int gr_mem_len;
 509                 char *gr_mem, *new_gr_mem_list;
 510
 511                 /* Do we need to fetch another chunk of groups? */
 512
 513         tryagain:
 514
 515                 DEBUG(10, ("entry_index = %d, num_entries = %d\n",
 516                            ent->sam_entry_index, ent->num_sam_entries));
 517
 518                 if (ent->num_sam_entries == ent->sam_entry_index) {
 519
 520                         while(ent && !get_sam_group_entries(ent)) {
 521                                 struct getent_state *next_ent;
 522
 523                                 DEBUG(10, ("freeing state info for domain %s\n", ent->domain_name));
 524
 525                                 /* Free state information for this domain */
 526
 527                                 SAFE_FREE(ent->sam_entries);
 528
 529                                 next_ent = ent->next;
 530                                 DLIST_REMOVE(state->getgrent_state, ent);
 531
 532                                 SAFE_FREE(ent);
 533                                 ent = next_ent;
 534                         }
 535
 536                         /* No more domains */
 537
 538                         if (!ent)
 539                                 break;
 540                 }
 541
 542                 name_list = ent->sam_entries;
 543
 544                 /* Lookup group info */
 545
 546                 if (!winbindd_idmap_get_gid_from_rid(
 547                         ent->domain_name,
 548                         name_list[ent->sam_entry_index].rid,
 549                         &group_gid)) {
 550
 551                         DEBUG(1, ("could not look up gid for group %s\n",
 552                                   name_list[ent->sam_entry_index].acct_name));
 553
 554                         ent->sam_entry_index++;
 555                         goto tryagain;
 556                 }
 557
 558                 DEBUG(10, ("got gid %d for group %x\n", group_gid,
 559                            name_list[ent->sam_entry_index].rid));
 560
 561                 /* Fill in group entry */
 562
 563                 fill_domain_username(domain_group_name, ent->domain_name,
 564                          name_list[ent->sam_entry_index].acct_name);
 565
 566                 result = fill_grent(&group_list[group_list_ndx],
 567                                     ent->domain_name,
 568                                     name_list[ent->sam_entry_index].acct_name,
 569                                     group_gid);
 570
 571                 /* Fill in group membership entry */
 572
 573                 if (result) {
 574                         struct winbindd_domain *domain;
 575
 576                         if (!(domain =
 577                               find_domain_from_name(ent->domain_name))) {
 578                                 DEBUG(3, ("No such domain %s in winbindd_getgrent\n", ent->domain_name));
 579                                 result = False;
 580                                 goto done;
 581                         }
 582
 583                         group_list[group_list_ndx].num_gr_mem = 0;
 584                         gr_mem = NULL;
 585                         gr_mem_len = 0;
 586
 587                         /* Get group membership */
 588                         if (state->request.cmd == WINBINDD_GETGRLST) {
 589                                 result = True;
 590                         } else {
 591                                 result = fill_grent_mem(
 592                                         domain,
 593                                         name_list[ent->sam_entry_index].rid,
 594                                         SID_NAME_DOM_GRP,
 595                                         &group_list[group_list_ndx].num_gr_mem,
 596                                         &gr_mem, &gr_mem_len);
 597                         }
 598                 }
 599
 600                 if (result) {
 601                         /* Append to group membership list */
 602                         new_gr_mem_list = Realloc(
 603                                 gr_mem_list,
 604                                 gr_mem_list_len + gr_mem_len);
 605
 606                         if (!new_gr_mem_list && (group_list[group_list_ndx].num_gr_mem != 0)) {
 607                                 DEBUG(0, ("out of memory\n"));
 608                                 SAFE_FREE(gr_mem_list);
 609                                 gr_mem_list_len = 0;
 610                                 break;
 611                         }
 612
 613                         DEBUG(10, ("list_len = %d, mem_len = %d\n",
 614                                    gr_mem_list_len, gr_mem_len));
 615
 616                         gr_mem_list = new_gr_mem_list;
 617
 618                         memcpy(&gr_mem_list[gr_mem_list_len], gr_mem,
 619                                gr_mem_len);
 620
 621                         SAFE_FREE(gr_mem);
 622
 623                         group_list[group_list_ndx].gr_mem_ofs =
 624                                 gr_mem_list_len;
 625
 626                         gr_mem_list_len += gr_mem_len;
 627                 }
 628
 629                 ent->sam_entry_index++;
 630
 631                 /* Add group to return list */
 632
 633                 if (result) {
 634
 635                         DEBUG(10, ("adding group num_entries = %d\n",
 636                                    state->response.data.num_entries));
 637
 638                         group_list_ndx++;
 639                         state->response.data.num_entries++;
 640
 641                         state->response.length +=
 642                                 sizeof(struct winbindd_gr);
 643
 644                 } else {
 645                         DEBUG(0, ("could not lookup domain group %s\n",
 646                                   domain_group_name));
 647                 }
 648         }
 649
 650         /* Copy the list of group memberships to the end of the extra data */
 651
 652         if (group_list_ndx == 0)
 653                 goto done;
 654
 655         new_extra_data = Realloc(
 656                 state->response.extra_data,
 657                 group_list_ndx * sizeof(struct winbindd_gr) + gr_mem_list_len);
 658
 659         if (!new_extra_data) {
 660                 DEBUG(0, ("out of memory\n"));
 661                 group_list_ndx = 0;
 662                 SAFE_FREE(state->response.extra_data);
 663                 SAFE_FREE(gr_mem_list);
 664
 665                 return WINBINDD_ERROR;
 666         }
 667
 668         state->response.extra_data = new_extra_data;
 669
 670         memcpy(&((char *)state->response.extra_data)
 671                [group_list_ndx * sizeof(struct winbindd_gr)],
 672                gr_mem_list, gr_mem_list_len);
 673
 674         SAFE_FREE(gr_mem_list);
 675
 676         state->response.length += gr_mem_list_len;
 677
 678         DEBUG(10, ("returning %d groups, length = %d\n",
 679                    group_list_ndx, gr_mem_list_len));
 680
 681         /* Out of domains */
 682
 683  done:
 684
 685         return (group_list_ndx > 0) ? WINBINDD_OK : WINBINDD_ERROR;
 686 }
 687
 688 /* List domain groups without mapping to unix ids */
 689
 690 enum winbindd_result winbindd_list_groups(struct winbindd_cli_state *state)
 691 {
 692         uint32 total_entries = 0;
 693         struct winbindd_domain *domain;
 694         char *extra_data = NULL;
 695         char *ted = NULL;
 696         int extra_data_len = 0, i;
 697
 698         DEBUG(3, ("[%5d]: list groups\n", state->pid));
 699
 700         /* Enumerate over trusted domains */
 701
 702         for (domain = domain_list(); domain; domain = domain->next) {
 703                 struct getent_state groups;
 704
 705                 ZERO_STRUCT(groups);
 706
 707                 /* Skip domains other than WINBINDD_DOMAIN environment
 708                    variable */
 709                 if ((strcmp(state->request.domain, "") != 0) &&
 710                     !check_domain_env(state->request.domain, domain->name))
 711                         continue;
 712
 713                 /* Get list of sam groups */
 714                 ZERO_STRUCT(groups);
 715                 fstrcpy(groups.domain_name, domain->name);
 716
 717                 get_sam_group_entries(&groups);
 718
 719                 if (groups.num_sam_entries == 0) {
 720                         /* this domain is empty or in an error state */
 721                         continue;
 722                 }
 723
 724                 /* keep track the of the total number of groups seen so
 725                    far over all domains */
 726                 total_entries += groups.num_sam_entries;
 727
 728                 /* Allocate some memory for extra data.  Note that we limit
 729                    account names to sizeof(fstring) = 128 characters.  */
 730                 ted = Realloc(extra_data, sizeof(fstring) * total_entries);
 731
 732                 if (!ted) {
 733                         DEBUG(0,("failed to enlarge buffer!\n"));
 734                         SAFE_FREE(extra_data);
 735                         return WINBINDD_ERROR;
 736                 } else
 737                         extra_data = ted;
 738
 739                 /* Pack group list into extra data fields */
 740                 for (i = 0; i < groups.num_sam_entries; i++) {
 741                         char *group_name = ((struct acct_info *)
 742                                             groups.sam_entries)[i].acct_name;
 743                         fstring name;
 744
 745                         fill_domain_username(name, domain->name, group_name);
 746                         /* Append to extra data */
 747                         memcpy(&extra_data[extra_data_len], name,
 748                                strlen(name));
 749                         extra_data_len += strlen(name);
 750                         extra_data[extra_data_len++] = ',';
 751                 }
 752
 753                 free(groups.sam_entries);
 754         }
 755
 756         /* Assign extra_data fields in response structure */
 757         if (extra_data) {
 758                 extra_data[extra_data_len - 1] = '\0';
 759                 state->response.extra_data = extra_data;
 760                 state->response.length += extra_data_len;
 761         }
 762
 763         /* No domains may have responded but that's still OK so don't
 764            return an error. */
 765
 766         return WINBINDD_OK;
 767 }
 768
 769 /* Get user supplementary groups.  This is much quicker than trying to
 770    invert the groups database. */
 771
 772 enum winbindd_result winbindd_getgroups(struct winbindd_cli_state *state)
 773 {
 774         fstring name_domain, name_user;
 775         DOM_SID user_sid;
 776         enum SID_NAME_USE name_type;
 777         uint32 user_rid, num_groups, num_gids;
 778         NTSTATUS status;
 779         uint32 *user_gids;
 780         struct winbindd_domain *domain;
 781         enum winbindd_result result = WINBINDD_ERROR;
 782         gid_t *gid_list;
 783         int i;
 784         TALLOC_CTX *mem_ctx;
 785
 786         DEBUG(3, ("[%5d]: getgroups %s\n", state->pid,
 787                   state->request.data.username));
 788
 789         if (!(mem_ctx = talloc_init_named("winbindd_getgroups(%s)",
 790                                           state->request.data.username)))
 791                 return WINBINDD_ERROR;
 792
 793         /* Parse domain and username */
 794
 795         if (!parse_domain_user(state->request.data.username, name_domain,
 796                           name_user))
 797                 goto done;
 798
 799         /* Get info for the domain */
 800
 801         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 802                 DEBUG(0, ("could not find domain entry for domain %s\n",
 803                           name_domain));
 804                 goto done;
 805         }
 806
 807         /* Get rid and name type from name.  The following costs 1 packet */
 808
 809         if (!winbindd_lookup_sid_by_name(domain, name_user, &user_sid,
 810                                          &name_type)) {
 811                 DEBUG(1, ("user '%s' does not exist\n", name_user));
 812                 goto done;
 813         }
 814
 815         if (name_type != SID_NAME_USER) {
 816                 DEBUG(1, ("name '%s' is not a user name: %d\n",
 817                           name_user, name_type));
 818                 goto done;
 819         }
 820
 821         sid_split_rid(&user_sid, &user_rid);
 822
 823         status = domain->methods->lookup_usergroups(domain, mem_ctx, user_rid, &num_groups, &user_gids);
 824         if (!NT_STATUS_IS_OK(status)) goto done;
 825
 826         /* Copy data back to client */
 827
 828         num_gids = 0;
 829         gid_list = malloc(sizeof(gid_t) * num_groups);
 830
 831         if (state->response.extra_data)
 832                 goto done;
 833
 834         for (i = 0; i < num_groups; i++) {
 835                 if (!winbindd_idmap_get_gid_from_rid(domain->name,
 836                                                      user_gids[i],
 837                                                      &gid_list[num_gids])) {
 838
 839                         DEBUG(1, ("unable to convert group rid %d to gid\n",
 840                                   user_gids[i]));
 841                         continue;
 842                 }
 843
 844                 num_gids++;
 845         }
 846
 847         state->response.data.num_entries = num_gids;
 848         state->response.extra_data = gid_list;
 849         state->response.length += num_gids * sizeof(gid_t);
 850
 851         result = WINBINDD_OK;
 852
 853  done:
 854
 855         talloc_destroy(mem_ctx);
 856
 857         return result;
 858 }