source3/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 /* Fill a grent structure from various other information */
  32
  33 static BOOL fill_grent(struct winbindd_gr *gr, const char *dom_name,
  34                        const char *gr_name, gid_t unix_gid)
  35 {
  36         fstring full_group_name;
  37         /* Fill in uid/gid */
  38         fill_domain_username(full_group_name, dom_name, gr_name);
  39
  40         gr->gr_gid = unix_gid;
  41
  42         /* Group name and password */
  43
  44         safe_strcpy(gr->gr_name, full_group_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         NTSTATUS status;
  64
  65         if (!(mem_ctx = talloc_init_named("fill_grent_mem(%s)", domain->name)))
  66                 return False;
  67
  68         /* Initialise group membership information */
  69
  70         DEBUG(10, ("group %s rid 0x%x\n", domain ? domain->name : "NULL",
  71                    group_rid));
  72
  73         *num_gr_mem = 0;
  74
  75         if (group_name_type != SID_NAME_DOM_GRP) {
  76                 DEBUG(1, ("rid %d in domain %s isn't a " "domain group\n",
  77                           group_rid, domain->name));
  78                 goto done;
  79         }
  80
  81         /* Lookup group members */
  82         status = domain->methods->lookup_groupmem(domain, mem_ctx, group_rid, &num_names,
  83                                                   &rid_mem, &names, &name_types);
  84         if (!NT_STATUS_IS_OK(status)) {
  85                 DEBUG(1, ("could not lookup membership for group rid %d in domain %s\n",
  86                           group_rid, domain->name));
  87
  88                 goto done;
  89         }
  90
  91         DEBUG(10, ("looked up %d names\n", num_names));
  92
  93         if (DEBUGLEVEL >= 10) {
  94                 for (i = 0; i < num_names; i++)
  95                         DEBUG(10, ("\t%20s %x %d\n", names[i], rid_mem[i],
  96                                    name_types[i]));
  97         }
  98
  99         /* Add members to list */
 100
 101         buf = NULL;
 102         buf_len = buf_ndx = 0;
 103
 104  again:
 105
 106         for (i = 0; i < num_names; i++) {
 107                 char *the_name;
 108                 fstring name;
 109                 int len;
 110
 111                 the_name = names[i];
 112
 113                 DEBUG(10, ("processing name %s\n", the_name));
 114
 115                 /* FIXME: need to cope with groups within groups.  These
 116                    occur in Universal groups on a Windows 2000 native mode
 117                    server. */
 118
 119                 if (name_types[i] != SID_NAME_USER) {
 120                         DEBUG(3, ("name %s isn't a domain user\n", the_name));
 121                         continue;
 122                 }
 123
 124                 /* Don't bother with machine accounts */
 125
 126                 if (the_name[strlen(the_name) - 1] == '$') {
 127                         DEBUG(10, ("%s is machine account\n", the_name));
 128                         continue;
 129                 }
 130
 131                 /* Append domain name */
 132
 133                 fill_domain_username(name, domain->name, the_name);
 134
 135                 len = strlen(name);
 136
 137                 /* Add to list or calculate buffer length */
 138
 139                 if (!buf) {
 140                         buf_len += len + 1; /* List is comma separated */
 141                         (*num_gr_mem)++;
 142                         DEBUG(10, ("buf_len + %d = %d\n", len + 1, buf_len));
 143                 } else {
 144                         DEBUG(10, ("appending %s at ndx %d\n", name, len));
 145                         safe_strcpy(&buf[buf_ndx], name, len);
 146                         buf_ndx += len;
 147                         buf[buf_ndx] = ',';
 148                         buf_ndx++;
 149                 }
 150         }
 151
 152         /* Allocate buffer */
 153
 154         if (!buf) {
 155                 if (!(buf = malloc(buf_len))) {
 156                         DEBUG(1, ("out of memory\n"));
 157                         result = False;
 158                         goto done;
 159                 }
 160                 memset(buf, 0, buf_len);
 161                 goto again;
 162         }
 163
 164         if (buf && buf_ndx > 0) {
 165                 buf[buf_ndx - 1] = '\0';
 166         }
 167
 168         *gr_mem = buf;
 169         *gr_mem_len = buf_len;
 170
 171         DEBUG(10, ("num_mem = %d, len = %d, mem = %s\n", *num_gr_mem,
 172                    buf_len, *num_gr_mem ? buf : "NULL"));
 173         result = True;
 174
 175 done:
 176
 177         talloc_destroy(mem_ctx);
 178
 179         DEBUG(10, ("fill_grent_mem returning %d\n", result));
 180
 181         return result;
 182 }
 183
 184 /* Return a group structure from a group name */
 185
 186 enum winbindd_result winbindd_getgrnam(struct winbindd_cli_state *state)
 187 {
 188         DOM_SID group_sid;
 189         struct winbindd_domain *domain;
 190         enum SID_NAME_USE name_type;
 191         uint32 group_rid;
 192         fstring name_domain, name_group;
 193         char *tmp, *gr_mem;
 194         gid_t gid;
 195         int gr_mem_len;
 196
 197         DEBUG(3, ("[%5d]: getgrnam %s\n", state->pid,
 198                   state->request.data.groupname));
 199
 200         /* Parse domain and groupname */
 201
 202         memset(name_group, 0, sizeof(fstring));
 203
 204         tmp = state->request.data.groupname;
 205         if (!parse_domain_user(tmp, name_domain, name_group))
 206                 return WINBINDD_ERROR;
 207
 208         /* Get info for the domain */
 209
 210         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 211                 DEBUG(0, ("could not get domain sid for domain %s\n",
 212                           name_domain));
 213                 return WINBINDD_ERROR;
 214         }
 215
 216         /* Get rid and name type from name */
 217
 218         if (!winbindd_lookup_sid_by_name(domain, name_group, &group_sid,
 219                                          &name_type)) {
 220                 DEBUG(1, ("group %s in domain %s does not exist\n",
 221                           name_group, name_domain));
 222                 return WINBINDD_ERROR;
 223         }
 224
 225         if ((name_type != SID_NAME_ALIAS) && (name_type != SID_NAME_DOM_GRP)) {
 226                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n",
 227                           name_group, name_type));
 228                 return WINBINDD_ERROR;
 229         }
 230
 231         /* Fill in group structure */
 232
 233         sid_split_rid(&group_sid, &group_rid);
 234
 235         if (!winbindd_idmap_get_gid_from_rid(domain->name, group_rid, &gid)) {
 236                 DEBUG(1, ("error converting unix gid to sid\n"));
 237                 return WINBINDD_ERROR;
 238         }
 239
 240         if (!fill_grent(&state->response.data.gr, name_domain,
 241                         name_group, gid) ||
 242             !fill_grent_mem(domain, group_rid, name_type,
 243                             &state->response.data.gr.num_gr_mem,
 244                             &gr_mem, &gr_mem_len)) {
 245                 return WINBINDD_ERROR;
 246         }
 247
 248         /* Group membership lives at start of extra data */
 249
 250         state->response.data.gr.gr_mem_ofs = 0;
 251
 252         state->response.length += gr_mem_len;
 253         state->response.extra_data = gr_mem;
 254
 255         return WINBINDD_OK;
 256 }
 257
 258 /* Return a group structure from a gid number */
 259
 260 enum winbindd_result winbindd_getgrgid(struct winbindd_cli_state *state)
 261 {
 262         struct winbindd_domain *domain;
 263         DOM_SID group_sid;
 264         enum SID_NAME_USE name_type;
 265         fstring dom_name;
 266         fstring group_name;
 267         uint32 group_rid;
 268         int gr_mem_len;
 269         char *gr_mem;
 270
 271         DEBUG(3, ("[%5d]: getgrgid %d\n", state->pid,
 272                   state->request.data.gid));
 273
 274         /* Bug out if the gid isn't in the winbind range */
 275
 276         if ((state->request.data.gid < server_state.gid_low) ||
 277             (state->request.data.gid > server_state.gid_high))
 278                 return WINBINDD_ERROR;
 279
 280         /* Get rid from gid */
 281
 282         if (!winbindd_idmap_get_rid_from_gid(state->request.data.gid,
 283                                              &group_rid, &domain)) {
 284                 DEBUG(1, ("could not convert gid %d to rid\n",
 285                           state->request.data.gid));
 286                 return WINBINDD_ERROR;
 287         }
 288
 289         /* Get sid from gid */
 290
 291         sid_copy(&group_sid, &domain->sid);
 292         sid_append_rid(&group_sid, group_rid);
 293
 294         if (!winbindd_lookup_name_by_sid(&group_sid, dom_name, group_name, &name_type)) {
 295                 DEBUG(1, ("could not lookup sid\n"));
 296                 return WINBINDD_ERROR;
 297         }
 298
 299         if (!((name_type == SID_NAME_ALIAS) ||
 300               (name_type == SID_NAME_DOM_GRP))) {
 301                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n",
 302                           group_name, name_type));
 303                 return WINBINDD_ERROR;
 304         }
 305
 306         /* Fill in group structure */
 307
 308         if (!fill_grent(&state->response.data.gr, dom_name, group_name,
 309                         state->request.data.gid) ||
 310             !fill_grent_mem(domain, group_rid, name_type,
 311                             &state->response.data.gr.num_gr_mem,
 312                             &gr_mem, &gr_mem_len))
 313                 return WINBINDD_ERROR;
 314
 315         /* Group membership lives at start of extra data */
 316
 317         state->response.data.gr.gr_mem_ofs = 0;
 318
 319         state->response.length += gr_mem_len;
 320         state->response.extra_data = gr_mem;
 321
 322         return WINBINDD_OK;
 323 }
 324
 325 /*
 326  * set/get/endgrent functions
 327  */
 328
 329 /* "Rewind" file pointer for group database enumeration */
 330
 331 enum winbindd_result winbindd_setgrent(struct winbindd_cli_state *state)
 332 {
 333         struct winbindd_domain *domain;
 334
 335         DEBUG(3, ("[%5d]: setgrent\n", state->pid));
 336
 337         /* Check user has enabled this */
 338
 339         if (!lp_winbind_enum_groups())
 340                 return WINBINDD_ERROR;
 341
 342         /* Free old static data if it exists */
 343
 344         if (state->getgrent_state != NULL) {
 345                 free_getent_state(state->getgrent_state);
 346                 state->getgrent_state = NULL;
 347         }
 348
 349         /* Create sam pipes for each domain we know about */
 350
 351         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 352                 struct getent_state *domain_state;
 353
 354                 /* Skip domains other than WINBINDD_DOMAIN environment
 355                    variable */
 356
 357                 if ((strcmp(state->request.domain, "") != 0) &&
 358                     !check_domain_env(state->request.domain, domain->name))
 359                         continue;
 360
 361                 /* Create a state record for this domain */
 362
 363                 if ((domain_state = (struct getent_state *)
 364                      malloc(sizeof(struct getent_state))) == NULL)
 365                         return WINBINDD_ERROR;
 366
 367                 ZERO_STRUCTP(domain_state);
 368
 369                 fstrcpy(domain_state->domain_name, domain->name);
 370
 371                 /* Add to list of open domains */
 372
 373                 DLIST_ADD(state->getgrent_state, domain_state);
 374         }
 375
 376         return WINBINDD_OK;
 377 }
 378
 379 /* Close file pointer to ntdom group database */
 380
 381 enum winbindd_result winbindd_endgrent(struct winbindd_cli_state *state)
 382 {
 383         DEBUG(3, ("[%5d]: endgrent\n", state->pid));
 384
 385         free_getent_state(state->getgrent_state);
 386         state->getgrent_state = NULL;
 387
 388         return WINBINDD_OK;
 389 }
 390
 391 /* Get the list of domain groups and domain aliases for a domain.  We fill in
 392    the sam_entries and num_sam_entries fields with domain group information.
 393    The dispinfo_ndx field is incremented to the index of the next group to
 394    fetch. Return True if some groups were returned, False otherwise. */
 395
 396 #define MAX_FETCH_SAM_ENTRIES 100
 397
 398 static BOOL get_sam_group_entries(struct getent_state *ent)
 399 {
 400         NTSTATUS status;
 401         uint32 num_entries;
 402         struct acct_info *name_list = NULL;
 403         TALLOC_CTX *mem_ctx;
 404         BOOL result = False;
 405         struct acct_info *sam_grp_entries = NULL;
 406         struct winbindd_domain *domain;
 407
 408         if (ent->got_sam_entries)
 409                 return False;
 410
 411         if (!(mem_ctx = talloc_init_named("get_sam_group_entries(%s)",
 412                                           ent->domain_name)))
 413                 return False;
 414
 415         /* Free any existing group info */
 416
 417         SAFE_FREE(ent->sam_entries);
 418         ent->num_sam_entries = 0;
 419         ent->got_sam_entries = True;
 420
 421         /* Enumerate domain groups */
 422
 423         num_entries = 0;
 424
 425         if (!(domain = find_domain_from_name(ent->domain_name))) {
 426                 DEBUG(3, ("no such domain %s in get_sam_group_entries\n", ent->domain_name));
 427                 goto done;
 428         }
 429
 430         status = domain->methods->enum_dom_groups(domain,
 431                                                   mem_ctx,
 432                                                   &num_entries,
 433                                                   &sam_grp_entries);
 434
 435         if (!NT_STATUS_IS_OK(status)) {
 436                 result = False;
 437                 goto done;
 438         }
 439
 440         /* Copy entries into return buffer */
 441
 442         if (num_entries) {
 443                 name_list = malloc(sizeof(struct acct_info) * num_entries);
 444                 memcpy(name_list, sam_grp_entries,
 445                        num_entries * sizeof(struct acct_info));
 446         }
 447
 448         ent->num_sam_entries = num_entries;
 449
 450         /* Fill in remaining fields */
 451
 452         ent->sam_entries = name_list;
 453         ent->sam_entry_index = 0;
 454
 455         result = (ent->num_sam_entries > 0);
 456
 457  done:
 458         talloc_destroy(mem_ctx);
 459
 460         return result;
 461 }
 462
 463 /* Fetch next group entry from ntdom database */
 464
 465 #define MAX_GETGRENT_GROUPS 500
 466
 467 enum winbindd_result winbindd_getgrent(struct winbindd_cli_state *state)
 468 {
 469         struct getent_state *ent;
 470         struct winbindd_gr *group_list = NULL;
 471         int num_groups, group_list_ndx = 0, i, gr_mem_list_len = 0;
 472         char *new_extra_data, *gr_mem_list = NULL;
 473
 474         DEBUG(3, ("[%5d]: getgrent\n", state->pid));
 475
 476         /* Check user has enabled this */
 477
 478         if (!lp_winbind_enum_groups())
 479                 return WINBINDD_ERROR;
 480
 481         num_groups = MIN(MAX_GETGRENT_GROUPS, state->request.data.num_entries);
 482
 483         if ((state->response.extra_data =
 484              malloc(num_groups * sizeof(struct winbindd_gr))) == NULL)
 485                 return WINBINDD_ERROR;
 486
 487         state->response.data.num_entries = 0;
 488
 489         group_list = (struct winbindd_gr *)state->response.extra_data;
 490
 491         if (!(ent = state->getgrent_state))
 492                 return WINBINDD_ERROR;
 493
 494         /* Start sending back groups */
 495
 496         for (i = 0; i < num_groups; i++) {
 497                 struct acct_info *name_list = NULL;
 498                 fstring domain_group_name;
 499                 uint32 result;
 500                 gid_t group_gid;
 501                 int gr_mem_len;
 502                 char *gr_mem, *new_gr_mem_list;
 503
 504                 /* Do we need to fetch another chunk of groups? */
 505
 506         tryagain:
 507
 508                 DEBUG(10, ("entry_index = %d, num_entries = %d\n",
 509                            ent->sam_entry_index, ent->num_sam_entries));
 510
 511                 if (ent->num_sam_entries == ent->sam_entry_index) {
 512
 513                         while(ent && !get_sam_group_entries(ent)) {
 514                                 struct getent_state *next_ent;
 515
 516                                 DEBUG(10, ("freeing state info for domain %s\n", ent->domain_name));
 517
 518                                 /* Free state information for this domain */
 519
 520                                 SAFE_FREE(ent->sam_entries);
 521
 522                                 next_ent = ent->next;
 523                                 DLIST_REMOVE(state->getgrent_state, ent);
 524
 525                                 SAFE_FREE(ent);
 526                                 ent = next_ent;
 527                         }
 528
 529                         /* No more domains */
 530
 531                         if (!ent)
 532                                 break;
 533                 }
 534
 535                 name_list = ent->sam_entries;
 536
 537                 /* Lookup group info */
 538
 539                 if (!winbindd_idmap_get_gid_from_rid(
 540                         ent->domain_name,
 541                         name_list[ent->sam_entry_index].rid,
 542                         &group_gid)) {
 543
 544                         DEBUG(1, ("could not look up gid for group %s\n",
 545                                   name_list[ent->sam_entry_index].acct_name));
 546
 547                         ent->sam_entry_index++;
 548                         goto tryagain;
 549                 }
 550
 551                 DEBUG(10, ("got gid %d for group %x\n", group_gid,
 552                            name_list[ent->sam_entry_index].rid));
 553
 554                 /* Fill in group entry */
 555
 556                 fill_domain_username(domain_group_name, ent->domain_name,
 557                          name_list[ent->sam_entry_index].acct_name);
 558
 559                 result = fill_grent(&group_list[group_list_ndx],
 560                                     ent->domain_name,
 561                                     name_list[ent->sam_entry_index].acct_name,
 562                                     group_gid);
 563
 564                 /* Fill in group membership entry */
 565
 566                 if (result) {
 567                         struct winbindd_domain *domain;
 568
 569                         if (!(domain =
 570                               find_domain_from_name(ent->domain_name))) {
 571                                 DEBUG(3, ("No such domain %s in winbindd_getgrent\n", ent->domain_name));
 572                                 result = False;
 573                                 goto done;
 574                         }
 575
 576                         /* Get group membership */
 577
 578                         result = fill_grent_mem(
 579                                 domain,
 580                                 name_list[ent->sam_entry_index].rid,
 581                                 SID_NAME_DOM_GRP,
 582                                 &group_list[group_list_ndx].num_gr_mem,
 583                                 &gr_mem, &gr_mem_len);
 584                 }
 585
 586                 if (result) {
 587                         /* Append to group membership list */
 588                         new_gr_mem_list = Realloc(
 589                                 gr_mem_list,
 590                                 gr_mem_list_len + gr_mem_len);
 591
 592                         if (!new_gr_mem_list && (group_list[group_list_ndx].num_gr_mem != 0)) {
 593                                 DEBUG(0, ("out of memory\n"));
 594                                 SAFE_FREE(gr_mem_list);
 595                                 gr_mem_list_len = 0;
 596                                 break;
 597                         }
 598
 599                         DEBUG(10, ("list_len = %d, mem_len = %d\n",
 600                                    gr_mem_list_len, gr_mem_len));
 601
 602                         gr_mem_list = new_gr_mem_list;
 603
 604                         memcpy(&gr_mem_list[gr_mem_list_len], gr_mem,
 605                                gr_mem_len);
 606
 607                         SAFE_FREE(gr_mem);
 608
 609                         group_list[group_list_ndx].gr_mem_ofs =
 610                                 gr_mem_list_len;
 611
 612                         gr_mem_list_len += gr_mem_len;
 613                 }
 614
 615                 ent->sam_entry_index++;
 616
 617                 /* Add group to return list */
 618
 619                 if (result) {
 620
 621                         DEBUG(10, ("adding group num_entries = %d\n",
 622                                    state->response.data.num_entries));
 623
 624                         group_list_ndx++;
 625                         state->response.data.num_entries++;
 626
 627                         state->response.length +=
 628                                 sizeof(struct winbindd_gr);
 629
 630                 } else {
 631                         DEBUG(0, ("could not lookup domain group %s\n",
 632                                   domain_group_name));
 633                 }
 634         }
 635
 636         /* Copy the list of group memberships to the end of the extra data */
 637
 638         if (group_list_ndx == 0)
 639                 goto done;
 640
 641         new_extra_data = Realloc(
 642                 state->response.extra_data,
 643                 group_list_ndx * sizeof(struct winbindd_gr) + gr_mem_list_len);
 644
 645         if (!new_extra_data) {
 646                 DEBUG(0, ("out of memory\n"));
 647                 group_list_ndx = 0;
 648                 SAFE_FREE(state->response.extra_data);
 649                 SAFE_FREE(gr_mem_list);
 650
 651                 return WINBINDD_ERROR;
 652         }
 653
 654         state->response.extra_data = new_extra_data;
 655
 656         memcpy(&((char *)state->response.extra_data)
 657                [group_list_ndx * sizeof(struct winbindd_gr)],
 658                gr_mem_list, gr_mem_list_len);
 659
 660         SAFE_FREE(gr_mem_list);
 661
 662         state->response.length += gr_mem_list_len;
 663
 664         DEBUG(10, ("returning %d groups, length = %d\n",
 665                    group_list_ndx, gr_mem_list_len));
 666
 667         /* Out of domains */
 668
 669  done:
 670
 671         return (group_list_ndx > 0) ? WINBINDD_OK : WINBINDD_ERROR;
 672 }
 673
 674 /* List domain groups without mapping to unix ids */
 675
 676 enum winbindd_result winbindd_list_groups(struct winbindd_cli_state *state)
 677 {
 678         uint32 total_entries = 0;
 679         struct winbindd_domain *domain;
 680         char *extra_data = NULL;
 681         char *ted = NULL;
 682         int extra_data_len = 0, i;
 683
 684         DEBUG(3, ("[%5d]: list groups\n", state->pid));
 685
 686         /* Enumerate over trusted domains */
 687
 688         for (domain = domain_list(); domain; domain = domain->next) {
 689                 struct getent_state groups;
 690
 691                 ZERO_STRUCT(groups);
 692
 693                 /* Skip domains other than WINBINDD_DOMAIN environment
 694                    variable */
 695                 if ((strcmp(state->request.domain, "") != 0) &&
 696                     !check_domain_env(state->request.domain, domain->name))
 697                         continue;
 698
 699                 /* Get list of sam groups */
 700                 ZERO_STRUCT(groups);
 701                 fstrcpy(groups.domain_name, domain->name);
 702
 703                 get_sam_group_entries(&groups);
 704
 705                 if (groups.num_sam_entries == 0) {
 706                         /* this domain is empty or in an error state */
 707                         continue;
 708                 }
 709
 710                 /* keep track the of the total number of groups seen so
 711                    far over all domains */
 712                 total_entries += groups.num_sam_entries;
 713
 714                 /* Allocate some memory for extra data.  Note that we limit
 715                    account names to sizeof(fstring) = 128 characters.  */
 716                 ted = Realloc(extra_data, sizeof(fstring) * total_entries);
 717
 718                 if (!ted) {
 719                         DEBUG(0,("failed to enlarge buffer!\n"));
 720                         SAFE_FREE(extra_data);
 721                         return WINBINDD_ERROR;
 722                 } else
 723                         extra_data = ted;
 724
 725                 /* Pack group list into extra data fields */
 726                 for (i = 0; i < groups.num_sam_entries; i++) {
 727                         char *group_name = ((struct acct_info *)
 728                                             groups.sam_entries)[i].acct_name;
 729                         fstring name;
 730
 731                         fill_domain_username(name, domain->name, group_name);
 732                         /* Append to extra data */
 733                         memcpy(&extra_data[extra_data_len], name,
 734                                strlen(name));
 735                         extra_data_len += strlen(name);
 736                         extra_data[extra_data_len++] = ',';
 737                 }
 738
 739                 free(groups.sam_entries);
 740         }
 741
 742         /* Assign extra_data fields in response structure */
 743         if (extra_data) {
 744                 extra_data[extra_data_len - 1] = '\0';
 745                 state->response.extra_data = extra_data;
 746                 state->response.length += extra_data_len;
 747         }
 748
 749         /* No domains may have responded but that's still OK so don't
 750            return an error. */
 751
 752         return WINBINDD_OK;
 753 }
 754
 755 /* Get user supplementary groups.  This is much quicker than trying to
 756    invert the groups database. */
 757
 758 enum winbindd_result winbindd_getgroups(struct winbindd_cli_state *state)
 759 {
 760         fstring name_domain, name_user;
 761         DOM_SID user_sid;
 762         enum SID_NAME_USE name_type;
 763         uint32 user_rid, num_groups, num_gids;
 764         NTSTATUS status;
 765         uint32 *user_gids;
 766         struct winbindd_domain *domain;
 767         enum winbindd_result result = WINBINDD_ERROR;
 768         gid_t *gid_list;
 769         int i;
 770         TALLOC_CTX *mem_ctx;
 771
 772         DEBUG(3, ("[%5d]: getgroups %s\n", state->pid,
 773                   state->request.data.username));
 774
 775         if (!(mem_ctx = talloc_init_named("winbindd_getgroups(%s)",
 776                                           state->request.data.username)))
 777                 return WINBINDD_ERROR;
 778
 779         /* Parse domain and username */
 780
 781         if (!parse_domain_user(state->request.data.username, name_domain,
 782                           name_user))
 783                 goto done;
 784
 785         /* Get info for the domain */
 786
 787         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 788                 DEBUG(0, ("could not find domain entry for domain %s\n",
 789                           name_domain));
 790                 goto done;
 791         }
 792
 793         /* Get rid and name type from name.  The following costs 1 packet */
 794
 795         if (!winbindd_lookup_sid_by_name(domain, name_user, &user_sid,
 796                                          &name_type)) {
 797                 DEBUG(1, ("user '%s' does not exist\n", name_user));
 798                 goto done;
 799         }
 800
 801         if (name_type != SID_NAME_USER) {
 802                 DEBUG(1, ("name '%s' is not a user name: %d\n",
 803                           name_user, name_type));
 804                 goto done;
 805         }
 806
 807         sid_split_rid(&user_sid, &user_rid);
 808
 809         status = domain->methods->lookup_usergroups(domain, mem_ctx, user_rid, &num_groups, &user_gids);
 810         if (!NT_STATUS_IS_OK(status)) goto done;
 811
 812         /* Copy data back to client */
 813
 814         num_gids = 0;
 815         gid_list = malloc(sizeof(gid_t) * num_groups);
 816
 817         if (state->response.extra_data)
 818                 goto done;
 819
 820         for (i = 0; i < num_groups; i++) {
 821                 if (!winbindd_idmap_get_gid_from_rid(domain->name,
 822                                                      user_gids[i],
 823                                                      &gid_list[num_gids])) {
 824
 825                         DEBUG(1, ("unable to convert group rid %d to gid\n",
 826                                   user_gids[i]));
 827                         continue;
 828                 }
 829
 830                 num_gids++;
 831         }
 832
 833         state->response.data.num_entries = num_gids;
 834         state->response.extra_data = gid_list;
 835         state->response.length += num_gids * sizeof(gid_t);
 836
 837         result = WINBINDD_OK;
 838
 839  done:
 840
 841         talloc_destroy(mem_ctx);
 842
 843         return result;
 844 }