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, char *gr_name,
  34                        gid_t unix_gid)
  35 {
  36         /* Fill in uid/gid */
  37
  38         gr->gr_gid = unix_gid;
  39
  40         /* Group name and password */
  41
  42         safe_strcpy(gr->gr_name, gr_name, sizeof(gr->gr_name) - 1);
  43         safe_strcpy(gr->gr_passwd, "x", sizeof(gr->gr_passwd) - 1);
  44
  45         return True;
  46 }
  47
  48 /* Fill in the group membership field of a NT group given by group_rid */
  49
  50 static BOOL fill_grent_mem(struct winbindd_domain *domain,
  51                            uint32 group_rid,
  52                            enum SID_NAME_USE group_name_type,
  53                            int *num_gr_mem, char **gr_mem, int *gr_mem_len)
  54 {
  55         uint32 *rid_mem = NULL, num_names = 0;
  56         uint32 *name_types = NULL;
  57         int buf_len, buf_ndx, i;
  58         char **names = NULL, *buf;
  59         BOOL result = False;
  60         TALLOC_CTX *mem_ctx;
  61         NTSTATUS status;
  62
  63         if (!(mem_ctx = talloc_init_named("fill_grent_mem(%s)", domain->name)))
  64                 return False;
  65
  66         /* Initialise group membership information */
  67
  68         DEBUG(10, ("group %s rid 0x%x\n", domain ? domain->name : "NULL",
  69                    group_rid));
  70
  71         *num_gr_mem = 0;
  72
  73         if (group_name_type != SID_NAME_DOM_GRP) {
  74                 DEBUG(1, ("rid %d in domain %s isn't a " "domain group\n",
  75                           group_rid, domain->name));
  76                 goto done;
  77         }
  78
  79         /* Lookup group members */
  80         status = domain->methods->lookup_groupmem(domain, mem_ctx, group_rid, &num_names,
  81                                                   &rid_mem, &names, &name_types);
  82         if (!NT_STATUS_IS_OK(status)) {
  83                 DEBUG(1, ("could not lookup membership for group rid %d in domain %s\n",
  84                           group_rid, domain->name));
  85
  86                 goto done;
  87         }
  88
  89         DEBUG(10, ("looked up %d names\n", num_names));
  90
  91         if (DEBUGLEVEL >= 10) {
  92                 for (i = 0; i < num_names; i++)
  93                         DEBUG(10, ("\t%20s %x %d\n", names[i], rid_mem[i],
  94                                    name_types[i]));
  95         }
  96
  97         /* Add members to list */
  98
  99         buf = NULL;
 100         buf_len = buf_ndx = 0;
 101
 102  again:
 103
 104         for (i = 0; i < num_names; i++) {
 105                 char *the_name;
 106                 fstring name;
 107                 int len;
 108
 109                 the_name = names[i];
 110
 111                 DEBUG(10, ("processing name %s\n", the_name));
 112
 113                 /* FIXME: need to cope with groups within groups.  These
 114                    occur in Universal groups on a Windows 2000 native mode
 115                    server. */
 116
 117                 if (name_types[i] != SID_NAME_USER) {
 118                         DEBUG(3, ("name %s isn't a domain user\n", the_name));
 119                         continue;
 120                 }
 121
 122                 /* Don't bother with machine accounts */
 123
 124                 if (the_name[strlen(the_name) - 1] == '$') {
 125                         DEBUG(10, ("%s is machine account\n", the_name));
 126                         continue;
 127                 }
 128
 129                 /* Append domain name */
 130
 131                 snprintf(name, sizeof(name), "%s%s%s", domain->name,
 132                          lp_winbind_separator(), 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) {
 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, name;
 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         snprintf(name, sizeof(name), "%s\\%s", name_domain, name_group);
 216
 217         /* Get rid and name type from name */
 218
 219         if (!winbindd_lookup_sid_by_name(domain, name, &group_sid,
 220                                          &name_type)) {
 221                 DEBUG(1, ("group %s in domain %s does not exist\n",
 222                           name_group, name_domain));
 223                 return WINBINDD_ERROR;
 224         }
 225
 226         if ((name_type != SID_NAME_ALIAS) && (name_type != SID_NAME_DOM_GRP)) {
 227                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n",
 228                           name_group, name_type));
 229                 return WINBINDD_ERROR;
 230         }
 231
 232         /* Fill in group structure */
 233
 234         sid_split_rid(&group_sid, &group_rid);
 235
 236         if (!winbindd_idmap_get_gid_from_rid(domain->name, group_rid, &gid)) {
 237                 DEBUG(1, ("error converting unix gid to sid\n"));
 238                 return WINBINDD_ERROR;
 239         }
 240
 241         if (!fill_grent(&state->response.data.gr,
 242                         state->request.data.groupname, gid) ||
 243             !fill_grent_mem(domain, group_rid, name_type,
 244                             &state->response.data.gr.num_gr_mem,
 245                             &gr_mem, &gr_mem_len)) {
 246                 return WINBINDD_ERROR;
 247         }
 248
 249         /* Group membership lives at start of extra data */
 250
 251         state->response.data.gr.gr_mem_ofs = 0;
 252
 253         state->response.length += gr_mem_len;
 254         state->response.extra_data = gr_mem;
 255
 256         return WINBINDD_OK;
 257 }
 258
 259 /* Return a group structure from a gid number */
 260
 261 enum winbindd_result winbindd_getgrgid(struct winbindd_cli_state *state)
 262 {
 263         struct winbindd_domain *domain;
 264         DOM_SID group_sid;
 265         enum SID_NAME_USE name_type;
 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, group_name, &name_type)) {
 295                 DEBUG(1, ("could not lookup sid\n"));
 296                 return WINBINDD_ERROR;
 297         }
 298
 299         if (strcmp(lp_winbind_separator(),"\\"))
 300                 string_sub(group_name, "\\", lp_winbind_separator(),
 301                            sizeof(fstring));
 302
 303         if (!((name_type == SID_NAME_ALIAS) ||
 304               (name_type == SID_NAME_DOM_GRP))) {
 305                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n",
 306                           group_name, name_type));
 307                 return WINBINDD_ERROR;
 308         }
 309
 310         /* Fill in group structure */
 311
 312         if (!fill_grent(&state->response.data.gr, group_name,
 313                         state->request.data.gid) ||
 314             !fill_grent_mem(domain, group_rid, name_type,
 315                             &state->response.data.gr.num_gr_mem,
 316                             &gr_mem, &gr_mem_len))
 317                 return WINBINDD_ERROR;
 318
 319         /* Group membership lives at start of extra data */
 320
 321         state->response.data.gr.gr_mem_ofs = 0;
 322
 323         state->response.length += gr_mem_len;
 324         state->response.extra_data = gr_mem;
 325
 326         return WINBINDD_OK;
 327 }
 328
 329 /*
 330  * set/get/endgrent functions
 331  */
 332
 333 /* "Rewind" file pointer for group database enumeration */
 334
 335 enum winbindd_result winbindd_setgrent(struct winbindd_cli_state *state)
 336 {
 337         struct winbindd_domain *domain;
 338
 339         DEBUG(3, ("[%5d]: setgrent\n", state->pid));
 340
 341         /* Check user has enabled this */
 342
 343         if (!lp_winbind_enum_groups())
 344                 return WINBINDD_ERROR;
 345
 346         /* Free old static data if it exists */
 347
 348         if (state->getgrent_state != NULL) {
 349                 free_getent_state(state->getgrent_state);
 350                 state->getgrent_state = NULL;
 351         }
 352
 353         /* Create sam pipes for each domain we know about */
 354
 355         if (domain_list == NULL)
 356                 get_domain_info();
 357
 358         for (domain = domain_list; domain != NULL; domain = domain->next) {
 359                 struct getent_state *domain_state;
 360
 361                 /* Skip domains other than WINBINDD_DOMAIN environment
 362                    variable */
 363
 364                 if ((strcmp(state->request.domain, "") != 0) &&
 365                     !check_domain_env(state->request.domain, domain->name))
 366                         continue;
 367
 368                 /* Create a state record for this domain */
 369
 370                 if ((domain_state = (struct getent_state *)
 371                      malloc(sizeof(struct getent_state))) == NULL)
 372                         return WINBINDD_ERROR;
 373
 374                 ZERO_STRUCTP(domain_state);
 375
 376                 domain_state->domain = domain;
 377
 378                 /* Add to list of open domains */
 379
 380                 DLIST_ADD(state->getgrent_state, domain_state);
 381         }
 382
 383         return WINBINDD_OK;
 384 }
 385
 386 /* Close file pointer to ntdom group database */
 387
 388 enum winbindd_result winbindd_endgrent(struct winbindd_cli_state *state)
 389 {
 390         DEBUG(3, ("[%5d]: endgrent\n", state->pid));
 391
 392         free_getent_state(state->getgrent_state);
 393         state->getgrent_state = NULL;
 394
 395         return WINBINDD_OK;
 396 }
 397
 398 /* Get the list of domain groups and domain aliases for a domain.  We fill in
 399    the sam_entries and num_sam_entries fields with domain group information.
 400    The dispinfo_ndx field is incremented to the index of the next group to
 401    fetch. Return True if some groups were returned, False otherwise. */
 402
 403 #define MAX_FETCH_SAM_ENTRIES 100
 404
 405 static BOOL get_sam_group_entries(struct getent_state *ent)
 406 {
 407         NTSTATUS status;
 408         uint32 num_entries;
 409         struct acct_info *name_list = NULL;
 410         TALLOC_CTX *mem_ctx;
 411         BOOL result = False;
 412         struct acct_info *sam_grp_entries = NULL;
 413
 414         if (ent->got_sam_entries)
 415                 return False;
 416
 417         if (!(mem_ctx = talloc_init_named("get_sam_group_entries(%s)",
 418                                           ent->domain->name)))
 419                 return False;
 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         num_entries = 0;
 429
 430         status = ent->domain->methods->enum_dom_groups(ent->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         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         ent->sam_entries = name_list;
 451         ent->sam_entry_index = 0;
 452
 453         result = (ent->num_sam_entries > 0);
 454
 455  done:
 456         talloc_destroy(mem_ctx);
 457
 458         return result;
 459 }
 460
 461 /* Fetch next group entry from ntdom database */
 462
 463 #define MAX_GETGRENT_GROUPS 500
 464
 465 enum winbindd_result winbindd_getgrent(struct winbindd_cli_state *state)
 466 {
 467         struct getent_state *ent;
 468         struct winbindd_gr *group_list = NULL;
 469         int num_groups, group_list_ndx = 0, i, gr_mem_list_len = 0;
 470         char *sep, *new_extra_data, *gr_mem_list = NULL;
 471
 472         DEBUG(3, ("[%5d]: getgrent\n", state->pid));
 473
 474         /* Check user has enabled this */
 475
 476         if (!lp_winbind_enum_groups())
 477                 return WINBINDD_ERROR;
 478
 479         num_groups = MIN(MAX_GETGRENT_GROUPS, state->request.data.num_entries);
 480
 481         if ((state->response.extra_data =
 482              malloc(num_groups * sizeof(struct winbindd_gr))) == NULL)
 483                 return WINBINDD_ERROR;
 484
 485         state->response.data.num_entries = 0;
 486
 487         group_list = (struct winbindd_gr *)state->response.extra_data;
 488         sep = lp_winbind_separator();
 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                 slprintf(domain_group_name, sizeof(domain_group_name) - 1,
 556                          "%s%s%s", ent->domain->name, lp_winbind_separator(),
 557                          name_list[ent->sam_entry_index].acct_name);
 558
 559                 result = fill_grent(&group_list[group_list_ndx],
 560                                     domain_group_name, group_gid);
 561
 562                 /* Fill in group membership entry */
 563
 564                 if (result) {
 565                         /* Get group membership */
 566                         result = fill_grent_mem(
 567                                 ent->domain,
 568                                 name_list[ent->sam_entry_index].rid,
 569                                 SID_NAME_DOM_GRP,
 570                                 &group_list[group_list_ndx].num_gr_mem,
 571                                 &gr_mem, &gr_mem_len);
 572                 }
 573
 574                 if (result) {
 575                         /* Append to group membership list */
 576                         new_gr_mem_list = Realloc(
 577                                 gr_mem_list,
 578                                 gr_mem_list_len + gr_mem_len);
 579
 580                         if (!new_gr_mem_list && (group_list[group_list_ndx].num_gr_mem != 0)) {
 581                                 DEBUG(0, ("out of memory\n"));
 582                                 SAFE_FREE(gr_mem_list);
 583                                 gr_mem_list_len = 0;
 584                                 break;
 585                         }
 586
 587                         DEBUG(10, ("list_len = %d, mem_len = %d\n",
 588                                    gr_mem_list_len, gr_mem_len));
 589
 590                         gr_mem_list = new_gr_mem_list;
 591
 592                         memcpy(&gr_mem_list[gr_mem_list_len], gr_mem,
 593                                gr_mem_len);
 594
 595                         SAFE_FREE(gr_mem);
 596
 597                         group_list[group_list_ndx].gr_mem_ofs =
 598                                 gr_mem_list_len;
 599
 600                         gr_mem_list_len += gr_mem_len;
 601                 }
 602
 603                 ent->sam_entry_index++;
 604
 605                 /* Add group to return list */
 606
 607                 if (result) {
 608
 609                         DEBUG(10, ("adding group num_entries = %d\n",
 610                                    state->response.data.num_entries));
 611
 612                         group_list_ndx++;
 613                         state->response.data.num_entries++;
 614
 615                         state->response.length +=
 616                                 sizeof(struct winbindd_gr);
 617
 618                 } else {
 619                         DEBUG(0, ("could not lookup domain group %s\n",
 620                                   domain_group_name));
 621                 }
 622         }
 623
 624         /* Copy the list of group memberships to the end of the extra data */
 625
 626         if (group_list_ndx == 0)
 627                 goto done;
 628
 629         new_extra_data = Realloc(
 630                 state->response.extra_data,
 631                 group_list_ndx * sizeof(struct winbindd_gr) + gr_mem_list_len);
 632
 633         if (!new_extra_data) {
 634                 DEBUG(0, ("out of memory\n"));
 635                 group_list_ndx = 0;
 636                 SAFE_FREE(state->response.extra_data);
 637                 SAFE_FREE(gr_mem_list);
 638
 639                 return WINBINDD_ERROR;
 640         }
 641
 642         state->response.extra_data = new_extra_data;
 643
 644         memcpy(&((char *)state->response.extra_data)
 645                [group_list_ndx * sizeof(struct winbindd_gr)],
 646                gr_mem_list, gr_mem_list_len);
 647
 648         SAFE_FREE(gr_mem_list);
 649
 650         state->response.length += gr_mem_list_len;
 651
 652         DEBUG(10, ("returning %d groups, length = %d\n",
 653                    group_list_ndx, gr_mem_list_len));
 654
 655         /* Out of domains */
 656
 657  done:
 658
 659         return (group_list_ndx > 0) ? WINBINDD_OK : WINBINDD_ERROR;
 660 }
 661
 662 /* List domain groups without mapping to unix ids */
 663
 664 enum winbindd_result winbindd_list_groups(struct winbindd_cli_state *state)
 665 {
 666         uint32 total_entries = 0;
 667         struct winbindd_domain *domain;
 668         char *extra_data = NULL;
 669         char *ted = NULL;
 670         int extra_data_len = 0, i;
 671
 672         DEBUG(3, ("[%5d]: list groups\n", state->pid));
 673
 674         /* Enumerate over trusted domains */
 675
 676         if (domain_list == NULL)
 677                 get_domain_info();
 678
 679         for (domain = domain_list; domain; domain = domain->next) {
 680                 struct getent_state groups;
 681
 682                 ZERO_STRUCT(groups);
 683
 684                 /* Skip domains other than WINBINDD_DOMAIN environment
 685                    variable */
 686                 if ((strcmp(state->request.domain, "") != 0) &&
 687                     !check_domain_env(state->request.domain, domain->name))
 688                         continue;
 689
 690                 /* Get list of sam groups */
 691                 ZERO_STRUCT(groups);
 692                 groups.domain = domain;
 693
 694                 get_sam_group_entries(&groups);
 695
 696                 if (groups.num_sam_entries == 0) {
 697                         /* this domain is empty or in an error state */
 698                         continue;
 699                 }
 700
 701                 /* keep track the of the total number of groups seen so
 702                    far over all domains */
 703                 total_entries += groups.num_sam_entries;
 704
 705                 /* Allocate some memory for extra data.  Note that we limit
 706                    account names to sizeof(fstring) = 128 characters.  */
 707                 ted = Realloc(extra_data, sizeof(fstring) * total_entries);
 708
 709                 if (!ted) {
 710                         DEBUG(0,("failed to enlarge buffer!\n"));
 711                         SAFE_FREE(extra_data);
 712                         return WINBINDD_ERROR;
 713                 } else
 714                         extra_data = ted;
 715
 716                 /* Pack group list into extra data fields */
 717                 for (i = 0; i < groups.num_sam_entries; i++) {
 718                         char *group_name = ((struct acct_info *)
 719                                             groups.sam_entries)[i].acct_name;
 720                         fstring name;
 721
 722                         snprintf(name, sizeof(name), "%s%s%s", domain->name,
 723                                 lp_winbind_separator(), group_name);
 724
 725                         /* Append to extra data */
 726                         memcpy(&extra_data[extra_data_len], name,
 727                                strlen(name));
 728                         extra_data_len += strlen(name);
 729                         extra_data[extra_data_len++] = ',';
 730                 }
 731
 732                 free(groups.sam_entries);
 733         }
 734
 735         /* Assign extra_data fields in response structure */
 736         if (extra_data) {
 737                 extra_data[extra_data_len - 1] = '\0';
 738                 state->response.extra_data = extra_data;
 739                 state->response.length += extra_data_len;
 740         }
 741
 742         /* No domains may have responded but that's still OK so don't
 743            return an error. */
 744
 745         return WINBINDD_OK;
 746 }
 747
 748 /* Get user supplementary groups.  This is much quicker than trying to
 749    invert the groups database. */
 750
 751 enum winbindd_result winbindd_getgroups(struct winbindd_cli_state *state)
 752 {
 753         fstring name_domain, name_user, name;
 754         DOM_SID user_sid;
 755         enum SID_NAME_USE name_type;
 756         uint32 user_rid, num_groups, num_gids;
 757         NTSTATUS status;
 758         uint32 *user_gids;
 759         struct winbindd_domain *domain;
 760         enum winbindd_result result = WINBINDD_ERROR;
 761         gid_t *gid_list;
 762         int i;
 763         TALLOC_CTX *mem_ctx;
 764
 765         DEBUG(3, ("[%5d]: getgroups %s\n", state->pid,
 766                   state->request.data.username));
 767
 768         if (!(mem_ctx = talloc_init_named("winbindd_getgroups(%s)",
 769                                           state->request.data.username)))
 770                 return WINBINDD_ERROR;
 771
 772         /* Parse domain and username */
 773
 774         if (!parse_domain_user(state->request.data.username, name_domain,
 775                           name_user))
 776                 goto done;
 777
 778         /* Get info for the domain */
 779
 780         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 781                 DEBUG(0, ("could not find domain entry for domain %s\n",
 782                           name_domain));
 783                 goto done;
 784         }
 785
 786         slprintf(name, sizeof(name) - 1, "%s\\%s", name_domain, name_user);
 787
 788         /* Get rid and name type from name.  The following costs 1 packet */
 789
 790         if (!winbindd_lookup_sid_by_name(domain, name, &user_sid,
 791                                          &name_type)) {
 792                 DEBUG(1, ("user '%s' does not exist\n", name_user));
 793                 goto done;
 794         }
 795
 796         if (name_type != SID_NAME_USER) {
 797                 DEBUG(1, ("name '%s' is not a user name: %d\n",
 798                           name_user, name_type));
 799                 goto done;
 800         }
 801
 802         sid_split_rid(&user_sid, &user_rid);
 803
 804         status = domain->methods->lookup_usergroups(domain, mem_ctx, user_rid, &num_groups, &user_gids);
 805         if (!NT_STATUS_IS_OK(status)) goto done;
 806
 807         /* Copy data back to client */
 808
 809         num_gids = 0;
 810         gid_list = malloc(sizeof(gid_t) * num_groups);
 811
 812         if (state->response.extra_data)
 813                 goto done;
 814
 815         for (i = 0; i < num_groups; i++) {
 816                 if (!winbindd_idmap_get_gid_from_rid(domain->name,
 817                                                      user_gids[i],
 818                                                      &gid_list[num_gids])) {
 819
 820                         DEBUG(1, ("unable to convert group rid %d to gid\n",
 821                                   user_gids[i]));
 822                         continue;
 823                 }
 824
 825                 num_gids++;
 826         }
 827
 828         state->response.data.num_entries = num_gids;
 829         state->response.extra_data = gid_list;
 830         state->response.length += num_gids * sizeof(gid_t);
 831
 832         result = WINBINDD_OK;
 833
 834  done:
 835
 836         talloc_destroy(mem_ctx);
 837
 838         return result;
 839 }