source/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 /***************************************************************
  27  Empty static struct for negative caching.
  28 ****************************************************************/
  29
  30 /* Fill a grent structure from various other information */
  31
  32 static BOOL fill_grent(struct winbindd_gr *gr, const char *dom_name,
  33                        const char *gr_name, gid_t unix_gid)
  34 {
  35         fstring full_group_name;
  36         /* Fill in uid/gid */
  37         fill_domain_username(full_group_name, dom_name, gr_name);
  38
  39         gr->gr_gid = unix_gid;
  40
  41         /* Group name and password */
  42
  43         safe_strcpy(gr->gr_name, full_group_name, sizeof(gr->gr_name) - 1);
  44         safe_strcpy(gr->gr_passwd, "x", sizeof(gr->gr_passwd) - 1);
  45
  46         return True;
  47 }
  48
  49 /* Fill in the group membership field of a NT group given by group_rid */
  50
  51 static BOOL fill_grent_mem(struct winbindd_domain *domain,
  52                            uint32 group_rid,
  53                            enum SID_NAME_USE group_name_type,
  54                            int *num_gr_mem, char **gr_mem, int *gr_mem_len)
  55 {
  56         uint32 *rid_mem = NULL, num_names = 0;
  57         uint32 *name_types = NULL;
  58         int buf_len, buf_ndx, i;
  59         char **names = NULL, *buf;
  60         BOOL result = False;
  61         TALLOC_CTX *mem_ctx;
  62         NTSTATUS status;
  63
  64         if (!(mem_ctx = talloc_init_named("fill_grent_mem(%s)", domain->name)))
  65                 return False;
  66
  67         /* Initialise group membership information */
  68
  69         DEBUG(10, ("group %s rid 0x%x\n", domain ? domain->name : "NULL",
  70                    group_rid));
  71
  72         *num_gr_mem = 0;
  73
  74         if (group_name_type != SID_NAME_DOM_GRP) {
  75                 DEBUG(1, ("rid %d in domain %s isn't a " "domain group\n",
  76                           group_rid, domain->name));
  77                 goto done;
  78         }
  79
  80         /* Lookup group members */
  81         status = domain->methods->lookup_groupmem(domain, mem_ctx, group_rid, &num_names,
  82                                                   &rid_mem, &names, &name_types);
  83         if (!NT_STATUS_IS_OK(status)) {
  84                 DEBUG(1, ("could not lookup membership for group rid %d in domain %s\n",
  85                           group_rid, domain->name));
  86
  87                 goto done;
  88         }
  89
  90         DEBUG(10, ("looked up %d names\n", num_names));
  91
  92         if (DEBUGLEVEL >= 10) {
  93                 for (i = 0; i < num_names; i++)
  94                         DEBUG(10, ("\t%20s %x %d\n", names[i], rid_mem[i],
  95                                    name_types[i]));
  96         }
  97
  98         /* Add members to list */
  99
 100         buf = NULL;
 101         buf_len = buf_ndx = 0;
 102
 103  again:
 104
 105         for (i = 0; i < num_names; i++) {
 106                 char *the_name;
 107                 fstring name;
 108                 int len;
 109
 110                 the_name = names[i];
 111
 112                 DEBUG(10, ("processing name %s\n", the_name));
 113
 114                 /* FIXME: need to cope with groups within groups.  These
 115                    occur in Universal groups on a Windows 2000 native mode
 116                    server. */
 117
 118                 if (name_types[i] != SID_NAME_USER) {
 119                         DEBUG(3, ("name %s isn't a domain user\n", the_name));
 120                         continue;
 121                 }
 122
 123                 /* Don't bother with machine accounts */
 124
 125                 if (the_name[strlen(the_name) - 1] == '$') {
 126                         DEBUG(10, ("%s is machine account\n", the_name));
 127                         continue;
 128                 }
 129
 130                 /* Append domain name */
 131
 132                 fill_domain_username(name, domain->name, the_name);
 133
 134                 len = strlen(name);
 135
 136                 /* Add to list or calculate buffer length */
 137
 138                 if (!buf) {
 139                         buf_len += len + 1; /* List is comma separated */
 140                         (*num_gr_mem)++;
 141                         DEBUG(10, ("buf_len + %d = %d\n", len + 1, buf_len));
 142                 } else {
 143                         DEBUG(10, ("appending %s at ndx %d\n", name, len));
 144                         safe_strcpy(&buf[buf_ndx], name, len);
 145                         buf_ndx += len;
 146                         buf[buf_ndx] = ',';
 147                         buf_ndx++;
 148                 }
 149         }
 150
 151         /* Allocate buffer */
 152
 153         if (!buf && buf_len != 0) {
 154                 if (!(buf = malloc(buf_len))) {
 155                         DEBUG(1, ("out of memory\n"));
 156                         result = False;
 157                         goto done;
 158                 }
 159                 memset(buf, 0, buf_len);
 160                 goto again;
 161         }
 162
 163         if (buf && buf_ndx > 0) {
 164                 buf[buf_ndx - 1] = '\0';
 165         }
 166
 167         *gr_mem = buf;
 168         *gr_mem_len = buf_len;
 169
 170         DEBUG(10, ("num_mem = %d, len = %d, mem = %s\n", *num_gr_mem,
 171                    buf_len, *num_gr_mem ? buf : "NULL"));
 172         result = True;
 173
 174 done:
 175
 176         talloc_destroy(mem_ctx);
 177
 178         DEBUG(10, ("fill_grent_mem returning %d\n", result));
 179
 180         return result;
 181 }
 182
 183 /* Return a group structure from a group name */
 184
 185 enum winbindd_result winbindd_getgrnam(struct winbindd_cli_state *state)
 186 {
 187         DOM_SID group_sid;
 188         struct winbindd_domain *domain;
 189         enum SID_NAME_USE name_type;
 190         uint32 group_rid;
 191         fstring name_domain, name_group;
 192         char *tmp, *gr_mem;
 193         gid_t gid;
 194         int gr_mem_len;
 195
 196         DEBUG(3, ("[%5d]: getgrnam %s\n", state->pid,
 197                   state->request.data.groupname));
 198
 199         /* Parse domain and groupname */
 200
 201         memset(name_group, 0, sizeof(fstring));
 202
 203         tmp = state->request.data.groupname;
 204         if (!parse_domain_user(tmp, name_domain, name_group))
 205                 return WINBINDD_ERROR;
 206
 207         /* Get info for the domain */
 208
 209         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 210                 DEBUG(0, ("could not get domain sid for domain %s\n",
 211                           name_domain));
 212                 return WINBINDD_ERROR;
 213         }
 214
 215         /* Get rid and name type from name */
 216
 217         if (!winbindd_lookup_sid_by_name(domain, name_group, &group_sid,
 218                                          &name_type)) {
 219                 DEBUG(1, ("group %s in domain %s does not exist\n",
 220                           name_group, name_domain));
 221                 return WINBINDD_ERROR;
 222         }
 223
 224         if ((name_type != SID_NAME_ALIAS) && (name_type != SID_NAME_DOM_GRP)) {
 225                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n",
 226                           name_group, name_type));
 227                 return WINBINDD_ERROR;
 228         }
 229
 230         /* Fill in group structure */
 231         if (!sid_peek_check_rid(&domain->sid, &group_sid, &group_rid))
 232                 return WINBINDD_ERROR;
 233
 234         if (!winbindd_idmap_get_gid_from_sid(&group_sid, &gid)) {
 235                 DEBUG(1, ("error converting unix gid to sid\n"));
 236                 return WINBINDD_ERROR;
 237         }
 238
 239         if (!fill_grent(&state->response.data.gr, name_domain,
 240                         name_group, gid) ||
 241             !fill_grent_mem(domain, group_rid, name_type,
 242                             &state->response.data.gr.num_gr_mem,
 243                             &gr_mem, &gr_mem_len)) {
 244                 return WINBINDD_ERROR;
 245         }
 246
 247         /* Group membership lives at start of extra data */
 248
 249         state->response.data.gr.gr_mem_ofs = 0;
 250
 251         state->response.length += gr_mem_len;
 252         state->response.extra_data = gr_mem;
 253
 254         return WINBINDD_OK;
 255 }
 256
 257 /* Return a group structure from a gid number */
 258
 259 enum winbindd_result winbindd_getgrgid(struct winbindd_cli_state *state)
 260 {
 261         struct winbindd_domain *domain;
 262         DOM_SID group_sid;
 263         enum SID_NAME_USE name_type;
 264         fstring dom_name;
 265         fstring group_name;
 266         uint32 group_rid;
 267         int gr_mem_len;
 268         char *gr_mem;
 269
 270         DEBUG(3, ("[%5d]: getgrgid %d\n", state->pid,
 271                   state->request.data.gid));
 272
 273         /* Bug out if the gid isn't in the winbind range */
 274
 275         if ((state->request.data.gid < server_state.gid_low) ||
 276             (state->request.data.gid > server_state.gid_high))
 277                 return WINBINDD_ERROR;
 278
 279         /* Get rid from gid */
 280
 281         if (!winbindd_idmap_get_rid_from_gid(state->request.data.gid,
 282                                              &group_rid, &domain)) {
 283                 DEBUG(1, ("could not convert gid %d to rid\n",
 284                           state->request.data.gid));
 285                 return WINBINDD_ERROR;
 286         }
 287
 288         /* Get sid from gid */
 289
 290         sid_copy(&group_sid, &domain->sid);
 291         sid_append_rid(&group_sid, group_rid);
 292
 293         if (!winbindd_lookup_name_by_sid(&group_sid, dom_name, group_name, &name_type)) {
 294                 DEBUG(1, ("could not lookup sid\n"));
 295                 return WINBINDD_ERROR;
 296         }
 297
 298         if (!((name_type == SID_NAME_ALIAS) ||
 299               (name_type == SID_NAME_DOM_GRP))) {
 300                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n",
 301                           group_name, name_type));
 302                 return WINBINDD_ERROR;
 303         }
 304
 305         /* Fill in group structure */
 306
 307         if (!fill_grent(&state->response.data.gr, dom_name, group_name,
 308                         state->request.data.gid) ||
 309             !fill_grent_mem(domain, group_rid, name_type,
 310                             &state->response.data.gr.num_gr_mem,
 311                             &gr_mem, &gr_mem_len))
 312                 return WINBINDD_ERROR;
 313
 314         /* Group membership lives at start of extra data */
 315
 316         state->response.data.gr.gr_mem_ofs = 0;
 317
 318         state->response.length += gr_mem_len;
 319         state->response.extra_data = gr_mem;
 320
 321         return WINBINDD_OK;
 322 }
 323
 324 /*
 325  * set/get/endgrent functions
 326  */
 327
 328 /* "Rewind" file pointer for group database enumeration */
 329
 330 enum winbindd_result winbindd_setgrent(struct winbindd_cli_state *state)
 331 {
 332         struct winbindd_domain *domain;
 333
 334         DEBUG(3, ("[%5d]: setgrent\n", state->pid));
 335
 336         /* Check user has enabled this */
 337
 338         if (!lp_winbind_enum_groups())
 339                 return WINBINDD_ERROR;
 340
 341         /* Free old static data if it exists */
 342
 343         if (state->getgrent_state != NULL) {
 344                 free_getent_state(state->getgrent_state);
 345                 state->getgrent_state = NULL;
 346         }
 347
 348         /* Create sam pipes for each domain we know about */
 349
 350         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 351                 struct getent_state *domain_state;
 352
 353                 /* Skip domains other than WINBINDD_DOMAIN environment
 354                    variable */
 355
 356                 if ((strcmp(state->request.domain, "") != 0) &&
 357                     !check_domain_env(state->request.domain, domain->name))
 358                         continue;
 359
 360                 /* Create a state record for this domain */
 361
 362                 if ((domain_state = (struct getent_state *)
 363                      malloc(sizeof(struct getent_state))) == NULL)
 364                         return WINBINDD_ERROR;
 365
 366                 ZERO_STRUCTP(domain_state);
 367
 368                 fstrcpy(domain_state->domain_name, domain->name);
 369
 370                 /* Add to list of open domains */
 371
 372                 DLIST_ADD(state->getgrent_state, domain_state);
 373         }
 374
 375         return WINBINDD_OK;
 376 }
 377
 378 /* Close file pointer to ntdom group database */
 379
 380 enum winbindd_result winbindd_endgrent(struct winbindd_cli_state *state)
 381 {
 382         DEBUG(3, ("[%5d]: endgrent\n", state->pid));
 383
 384         free_getent_state(state->getgrent_state);
 385         state->getgrent_state = NULL;
 386
 387         return WINBINDD_OK;
 388 }
 389
 390 /* Get the list of domain groups and domain aliases for a domain.  We fill in
 391    the sam_entries and num_sam_entries fields with domain group information.
 392    The dispinfo_ndx field is incremented to the index of the next group to
 393    fetch. Return True if some groups were returned, False otherwise. */
 394
 395 #define MAX_FETCH_SAM_ENTRIES 100
 396
 397 static BOOL get_sam_group_entries(struct getent_state *ent)
 398 {
 399         NTSTATUS status;
 400         uint32 num_entries;
 401         struct acct_info *name_list = NULL;
 402         TALLOC_CTX *mem_ctx;
 403         BOOL result = False;
 404         struct acct_info *sam_grp_entries = NULL;
 405         struct winbindd_domain *domain;
 406
 407         if (ent->got_sam_entries)
 408                 return False;
 409
 410         if (!(mem_ctx = talloc_init_named("get_sam_group_entries(%s)",
 411                                           ent->domain_name)))
 412                 return False;
 413
 414         /* Free any existing group info */
 415
 416         SAFE_FREE(ent->sam_entries);
 417         ent->num_sam_entries = 0;
 418         ent->got_sam_entries = True;
 419
 420         /* Enumerate domain groups */
 421
 422         num_entries = 0;
 423
 424         if (!(domain = find_domain_from_name(ent->domain_name))) {
 425                 DEBUG(3, ("no such domain %s in get_sam_group_entries\n", ent->domain_name));
 426                 goto done;
 427         }
 428
 429         status = domain->methods->enum_dom_groups(domain,
 430                                                   mem_ctx,
 431                                                   &num_entries,
 432                                                   &sam_grp_entries);
 433
 434         if (!NT_STATUS_IS_OK(status)) {
 435                 result = False;
 436                 goto done;
 437         }
 438
 439         /* Copy entries into return buffer */
 440
 441         if (num_entries) {
 442                 name_list = malloc(sizeof(struct acct_info) * num_entries);
 443                 memcpy(name_list, sam_grp_entries,
 444                        num_entries * sizeof(struct acct_info));
 445         }
 446
 447         ent->num_sam_entries = num_entries;
 448
 449         /* Fill in remaining fields */
 450
 451         ent->sam_entries = name_list;
 452         ent->sam_entry_index = 0;
 453
 454         result = (ent->num_sam_entries > 0);
 455
 456  done:
 457         talloc_destroy(mem_ctx);
 458
 459         return result;
 460 }
 461
 462 /* Fetch next group entry from ntdom database */
 463
 464 #define MAX_GETGRENT_GROUPS 500
 465
 466 enum winbindd_result winbindd_getgrent(struct winbindd_cli_state *state)
 467 {
 468         struct getent_state *ent;
 469         struct winbindd_gr *group_list = NULL;
 470         int num_groups, group_list_ndx = 0, i, gr_mem_list_len = 0;
 471         char *new_extra_data, *gr_mem_list = NULL;
 472
 473         DEBUG(3, ("[%5d]: getgrent\n", state->pid));
 474
 475         /* Check user has enabled this */
 476
 477         if (!lp_winbind_enum_groups())
 478                 return WINBINDD_ERROR;
 479
 480         num_groups = MIN(MAX_GETGRENT_GROUPS, state->request.data.num_entries);
 481
 482         if ((state->response.extra_data =
 483              malloc(num_groups * sizeof(struct winbindd_gr))) == NULL)
 484                 return WINBINDD_ERROR;
 485
 486         state->response.data.num_entries = 0;
 487
 488         group_list = (struct winbindd_gr *)state->response.extra_data;
 489
 490         if (!(ent = state->getgrent_state))
 491                 return WINBINDD_ERROR;
 492
 493         /* Start sending back groups */
 494
 495         for (i = 0; i < num_groups; i++) {
 496                 struct acct_info *name_list = NULL;
 497                 fstring domain_group_name;
 498                 uint32 result;
 499                 gid_t group_gid;
 500                 int gr_mem_len;
 501                 char *gr_mem, *new_gr_mem_list;
 502
 503                 /* Do we need to fetch another chunk of groups? */
 504
 505         tryagain:
 506
 507                 DEBUG(10, ("entry_index = %d, num_entries = %d\n",
 508                            ent->sam_entry_index, ent->num_sam_entries));
 509
 510                 if (ent->num_sam_entries == ent->sam_entry_index) {
 511
 512                         while(ent && !get_sam_group_entries(ent)) {
 513                                 struct getent_state *next_ent;
 514
 515                                 DEBUG(10, ("freeing state info for domain %s\n", ent->domain_name));
 516
 517                                 /* Free state information for this domain */
 518
 519                                 SAFE_FREE(ent->sam_entries);
 520
 521                                 next_ent = ent->next;
 522                                 DLIST_REMOVE(state->getgrent_state, ent);
 523
 524                                 SAFE_FREE(ent);
 525                                 ent = next_ent;
 526                         }
 527
 528                         /* No more domains */
 529
 530                         if (!ent)
 531                                 break;
 532                 }
 533
 534                 name_list = ent->sam_entries;
 535
 536                 /* Lookup group info */
 537
 538                 if (!winbindd_idmap_get_gid_from_rid(
 539                         ent->domain_name,
 540                         name_list[ent->sam_entry_index].rid,
 541                         &group_gid)) {
 542
 543                         DEBUG(1, ("could not look up gid for group %s\n",
 544                                   name_list[ent->sam_entry_index].acct_name));
 545
 546                         ent->sam_entry_index++;
 547                         goto tryagain;
 548                 }
 549
 550                 DEBUG(10, ("got gid %d for group %x\n", group_gid,
 551                            name_list[ent->sam_entry_index].rid));
 552
 553                 /* Fill in group entry */
 554
 555                 fill_domain_username(domain_group_name, ent->domain_name,
 556                          name_list[ent->sam_entry_index].acct_name);
 557
 558                 result = fill_grent(&group_list[group_list_ndx],
 559                                     ent->domain_name,
 560                                     name_list[ent->sam_entry_index].acct_name,
 561                                     group_gid);
 562
 563                 /* Fill in group membership entry */
 564
 565                 if (result) {
 566                         struct winbindd_domain *domain;
 567
 568                         if (!(domain =
 569                               find_domain_from_name(ent->domain_name))) {
 570                                 DEBUG(3, ("No such domain %s in winbindd_getgrent\n", ent->domain_name));
 571                                 result = False;
 572                                 goto done;
 573                         }
 574
 575                         /* Get group membership */
 576
 577                         result = fill_grent_mem(
 578                                 domain,
 579                                 name_list[ent->sam_entry_index].rid,
 580                                 SID_NAME_DOM_GRP,
 581                                 &group_list[group_list_ndx].num_gr_mem,
 582                                 &gr_mem, &gr_mem_len);
 583                 }
 584
 585                 if (result) {
 586                         /* Append to group membership list */
 587                         new_gr_mem_list = Realloc(
 588                                 gr_mem_list,
 589                                 gr_mem_list_len + gr_mem_len);
 590
 591                         if (!new_gr_mem_list && (group_list[group_list_ndx].num_gr_mem != 0)) {
 592                                 DEBUG(0, ("out of memory\n"));
 593                                 SAFE_FREE(gr_mem_list);
 594                                 gr_mem_list_len = 0;
 595                                 break;
 596                         }
 597
 598                         DEBUG(10, ("list_len = %d, mem_len = %d\n",
 599                                    gr_mem_list_len, gr_mem_len));
 600
 601                         gr_mem_list = new_gr_mem_list;
 602
 603                         memcpy(&gr_mem_list[gr_mem_list_len], gr_mem,
 604                                gr_mem_len);
 605
 606                         SAFE_FREE(gr_mem);
 607
 608                         group_list[group_list_ndx].gr_mem_ofs =
 609                                 gr_mem_list_len;
 610
 611                         gr_mem_list_len += gr_mem_len;
 612                 }
 613
 614                 ent->sam_entry_index++;
 615
 616                 /* Add group to return list */
 617
 618                 if (result) {
 619
 620                         DEBUG(10, ("adding group num_entries = %d\n",
 621                                    state->response.data.num_entries));
 622
 623                         group_list_ndx++;
 624                         state->response.data.num_entries++;
 625
 626                         state->response.length +=
 627                                 sizeof(struct winbindd_gr);
 628
 629                 } else {
 630                         DEBUG(0, ("could not lookup domain group %s\n",
 631                                   domain_group_name));
 632                 }
 633         }
 634
 635         /* Copy the list of group memberships to the end of the extra data */
 636
 637         if (group_list_ndx == 0)
 638                 goto done;
 639
 640         new_extra_data = Realloc(
 641                 state->response.extra_data,
 642                 group_list_ndx * sizeof(struct winbindd_gr) + gr_mem_list_len);
 643
 644         if (!new_extra_data) {
 645                 DEBUG(0, ("out of memory\n"));
 646                 group_list_ndx = 0;
 647                 SAFE_FREE(state->response.extra_data);
 648                 SAFE_FREE(gr_mem_list);
 649
 650                 return WINBINDD_ERROR;
 651         }
 652
 653         state->response.extra_data = new_extra_data;
 654
 655         memcpy(&((char *)state->response.extra_data)
 656                [group_list_ndx * sizeof(struct winbindd_gr)],
 657                gr_mem_list, gr_mem_list_len);
 658
 659         SAFE_FREE(gr_mem_list);
 660
 661         state->response.length += gr_mem_list_len;
 662
 663         DEBUG(10, ("returning %d groups, length = %d\n",
 664                    group_list_ndx, gr_mem_list_len));
 665
 666         /* Out of domains */
 667
 668  done:
 669
 670         return (group_list_ndx > 0) ? WINBINDD_OK : WINBINDD_ERROR;
 671 }
 672
 673 /* List domain groups without mapping to unix ids */
 674
 675 enum winbindd_result winbindd_list_groups(struct winbindd_cli_state *state)
 676 {
 677         uint32 total_entries = 0;
 678         struct winbindd_domain *domain;
 679         char *extra_data = NULL;
 680         char *ted = NULL;
 681         int extra_data_len = 0, i;
 682
 683         DEBUG(3, ("[%5d]: list groups\n", state->pid));
 684
 685         /* Enumerate over trusted domains */
 686
 687         for (domain = domain_list(); domain; domain = domain->next) {
 688                 struct getent_state groups;
 689
 690                 ZERO_STRUCT(groups);
 691
 692                 /* Skip domains other than WINBINDD_DOMAIN environment
 693                    variable */
 694                 if ((strcmp(state->request.domain, "") != 0) &&
 695                     !check_domain_env(state->request.domain, domain->name))
 696                         continue;
 697
 698                 /* Get list of sam groups */
 699                 ZERO_STRUCT(groups);
 700                 fstrcpy(groups.domain_name, domain->name);
 701
 702                 get_sam_group_entries(&groups);
 703
 704                 if (groups.num_sam_entries == 0) {
 705                         /* this domain is empty or in an error state */
 706                         continue;
 707                 }
 708
 709                 /* keep track the of the total number of groups seen so
 710                    far over all domains */
 711                 total_entries += groups.num_sam_entries;
 712
 713                 /* Allocate some memory for extra data.  Note that we limit
 714                    account names to sizeof(fstring) = 128 characters.  */
 715                 ted = Realloc(extra_data, sizeof(fstring) * total_entries);
 716
 717                 if (!ted) {
 718                         DEBUG(0,("failed to enlarge buffer!\n"));
 719                         SAFE_FREE(extra_data);
 720                         return WINBINDD_ERROR;
 721                 } else
 722                         extra_data = ted;
 723
 724                 /* Pack group list into extra data fields */
 725                 for (i = 0; i < groups.num_sam_entries; i++) {
 726                         char *group_name = ((struct acct_info *)
 727                                             groups.sam_entries)[i].acct_name;
 728                         fstring name;
 729
 730                         fill_domain_username(name, domain->name, group_name);
 731                         /* Append to extra data */
 732                         memcpy(&extra_data[extra_data_len], name,
 733                                strlen(name));
 734                         extra_data_len += strlen(name);
 735                         extra_data[extra_data_len++] = ',';
 736                 }
 737
 738                 free(groups.sam_entries);
 739         }
 740
 741         /* Assign extra_data fields in response structure */
 742         if (extra_data) {
 743                 extra_data[extra_data_len - 1] = '\0';
 744                 state->response.extra_data = extra_data;
 745                 state->response.length += extra_data_len;
 746         }
 747
 748         /* No domains may have responded but that's still OK so don't
 749            return an error. */
 750
 751         return WINBINDD_OK;
 752 }
 753
 754 /* Get user supplementary groups.  This is much quicker than trying to
 755    invert the groups database. */
 756
 757 enum winbindd_result winbindd_getgroups(struct winbindd_cli_state *state)
 758 {
 759         fstring name_domain, name_user;
 760         DOM_SID user_sid;
 761         enum SID_NAME_USE name_type;
 762         uint32 user_rid, num_groups, num_gids;
 763         NTSTATUS status;
 764         uint32 *user_gids;
 765         struct winbindd_domain *domain;
 766         enum winbindd_result result = WINBINDD_ERROR;
 767         gid_t *gid_list;
 768         int i;
 769         TALLOC_CTX *mem_ctx;
 770
 771         DEBUG(3, ("[%5d]: getgroups %s\n", state->pid,
 772                   state->request.data.username));
 773
 774         if (!(mem_ctx = talloc_init_named("winbindd_getgroups(%s)",
 775                                           state->request.data.username)))
 776                 return WINBINDD_ERROR;
 777
 778         /* Parse domain and username */
 779
 780         if (!parse_domain_user(state->request.data.username, name_domain,
 781                           name_user))
 782                 goto done;
 783
 784         /* Get info for the domain */
 785
 786         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 787                 DEBUG(0, ("could not find domain entry for domain %s\n",
 788                           name_domain));
 789                 goto done;
 790         }
 791
 792         /* Get rid and name type from name.  The following costs 1 packet */
 793
 794         if (!winbindd_lookup_sid_by_name(domain, name_user, &user_sid,
 795                                          &name_type)) {
 796                 DEBUG(1, ("user '%s' does not exist\n", name_user));
 797                 goto done;
 798         }
 799
 800         if (name_type != SID_NAME_USER) {
 801                 DEBUG(1, ("name '%s' is not a user name: %d\n",
 802                           name_user, name_type));
 803                 goto done;
 804         }
 805
 806         sid_split_rid(&user_sid, &user_rid);
 807
 808         status = domain->methods->lookup_usergroups(domain, mem_ctx, user_rid, &num_groups, &user_gids);
 809         if (!NT_STATUS_IS_OK(status)) goto done;
 810
 811         /* Copy data back to client */
 812
 813         num_gids = 0;
 814         gid_list = malloc(sizeof(gid_t) * num_groups);
 815
 816         if (state->response.extra_data)
 817                 goto done;
 818
 819         for (i = 0; i < num_groups; i++) {
 820                 if (!winbindd_idmap_get_gid_from_rid(domain->name,
 821                                                      user_gids[i],
 822                                                      &gid_list[num_gids])) {
 823
 824                         DEBUG(1, ("unable to convert group rid %d to gid\n",
 825                                   user_gids[i]));
 826                         continue;
 827                 }
 828
 829                 num_gids++;
 830         }
 831
 832         state->response.data.num_entries = num_gids;
 833         state->response.extra_data = gid_list;
 834         state->response.length += num_gids * sizeof(gid_t);
 835
 836         result = WINBINDD_OK;
 837
 838  done:
 839
 840         talloc_destroy(mem_ctx);
 841
 842         return result;
 843 }