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         sid_peek_rid(&group_sid, &group_rid);
 232
 233         if (!winbindd_idmap_get_gid_from_sid(&group_sid, &gid)) {
 234                 DEBUG(1, ("error converting unix gid to sid\n"));
 235                 return WINBINDD_ERROR;
 236         }
 237
 238         if (!fill_grent(&state->response.data.gr, name_domain,
 239                         name_group, gid) ||
 240             !fill_grent_mem(domain, group_rid, name_type,
 241                             &state->response.data.gr.num_gr_mem,
 242                             &gr_mem, &gr_mem_len)) {
 243                 return WINBINDD_ERROR;
 244         }
 245
 246         /* Group membership lives at start of extra data */
 247
 248         state->response.data.gr.gr_mem_ofs = 0;
 249
 250         state->response.length += gr_mem_len;
 251         state->response.extra_data = gr_mem;
 252
 253         return WINBINDD_OK;
 254 }
 255
 256 /* Return a group structure from a gid number */
 257
 258 enum winbindd_result winbindd_getgrgid(struct winbindd_cli_state *state)
 259 {
 260         struct winbindd_domain *domain;
 261         DOM_SID group_sid;
 262         enum SID_NAME_USE name_type;
 263         fstring dom_name;
 264         fstring group_name;
 265         uint32 group_rid;
 266         int gr_mem_len;
 267         char *gr_mem;
 268
 269         DEBUG(3, ("[%5d]: getgrgid %d\n", state->pid,
 270                   state->request.data.gid));
 271
 272         /* Bug out if the gid isn't in the winbind range */
 273
 274         if ((state->request.data.gid < server_state.gid_low) ||
 275             (state->request.data.gid > server_state.gid_high))
 276                 return WINBINDD_ERROR;
 277
 278         /* Get rid from gid */
 279
 280         if (!winbindd_idmap_get_rid_from_gid(state->request.data.gid,
 281                                              &group_rid, &domain)) {
 282                 DEBUG(1, ("could not convert gid %d to rid\n",
 283                           state->request.data.gid));
 284                 return WINBINDD_ERROR;
 285         }
 286
 287         /* Get sid from gid */
 288
 289         sid_copy(&group_sid, &domain->sid);
 290         sid_append_rid(&group_sid, group_rid);
 291
 292         if (!winbindd_lookup_name_by_sid(&group_sid, dom_name, group_name, &name_type)) {
 293                 DEBUG(1, ("could not lookup sid\n"));
 294                 return WINBINDD_ERROR;
 295         }
 296
 297         if (!((name_type == SID_NAME_ALIAS) ||
 298               (name_type == SID_NAME_DOM_GRP))) {
 299                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n",
 300                           group_name, name_type));
 301                 return WINBINDD_ERROR;
 302         }
 303
 304         /* Fill in group structure */
 305
 306         if (!fill_grent(&state->response.data.gr, dom_name, group_name,
 307                         state->request.data.gid) ||
 308             !fill_grent_mem(domain, group_rid, name_type,
 309                             &state->response.data.gr.num_gr_mem,
 310                             &gr_mem, &gr_mem_len))
 311                 return WINBINDD_ERROR;
 312
 313         /* Group membership lives at start of extra data */
 314
 315         state->response.data.gr.gr_mem_ofs = 0;
 316
 317         state->response.length += gr_mem_len;
 318         state->response.extra_data = gr_mem;
 319
 320         return WINBINDD_OK;
 321 }
 322
 323 /*
 324  * set/get/endgrent functions
 325  */
 326
 327 /* "Rewind" file pointer for group database enumeration */
 328
 329 enum winbindd_result winbindd_setgrent(struct winbindd_cli_state *state)
 330 {
 331         struct winbindd_domain *domain;
 332
 333         DEBUG(3, ("[%5d]: setgrent\n", state->pid));
 334
 335         /* Check user has enabled this */
 336
 337         if (!lp_winbind_enum_groups())
 338                 return WINBINDD_ERROR;
 339
 340         /* Free old static data if it exists */
 341
 342         if (state->getgrent_state != NULL) {
 343                 free_getent_state(state->getgrent_state);
 344                 state->getgrent_state = NULL;
 345         }
 346
 347         /* Create sam pipes for each domain we know about */
 348
 349         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 350                 struct getent_state *domain_state;
 351
 352                 /* Skip domains other than WINBINDD_DOMAIN environment
 353                    variable */
 354
 355                 if ((strcmp(state->request.domain, "") != 0) &&
 356                     !check_domain_env(state->request.domain, domain->name))
 357                         continue;
 358
 359                 /* Create a state record for this domain */
 360
 361                 if ((domain_state = (struct getent_state *)
 362                      malloc(sizeof(struct getent_state))) == NULL)
 363                         return WINBINDD_ERROR;
 364
 365                 ZERO_STRUCTP(domain_state);
 366
 367                 fstrcpy(domain_state->domain_name, domain->name);
 368
 369                 /* Add to list of open domains */
 370
 371                 DLIST_ADD(state->getgrent_state, domain_state);
 372         }
 373
 374         return WINBINDD_OK;
 375 }
 376
 377 /* Close file pointer to ntdom group database */
 378
 379 enum winbindd_result winbindd_endgrent(struct winbindd_cli_state *state)
 380 {
 381         DEBUG(3, ("[%5d]: endgrent\n", state->pid));
 382
 383         free_getent_state(state->getgrent_state);
 384         state->getgrent_state = NULL;
 385
 386         return WINBINDD_OK;
 387 }
 388
 389 /* Get the list of domain groups and domain aliases for a domain.  We fill in
 390    the sam_entries and num_sam_entries fields with domain group information.
 391    The dispinfo_ndx field is incremented to the index of the next group to
 392    fetch. Return True if some groups were returned, False otherwise. */
 393
 394 #define MAX_FETCH_SAM_ENTRIES 100
 395
 396 static BOOL get_sam_group_entries(struct getent_state *ent, NTSTATUS *status)
 397 {
 398         uint32 num_entries;
 399         struct acct_info *name_list = NULL;
 400         TALLOC_CTX *mem_ctx;
 401         BOOL result = False;
 402         struct acct_info *sam_grp_entries = NULL;
 403         struct winbindd_domain *domain;
 404         NTSTATUS nt_status;
 405
 406         if (!(mem_ctx = talloc_init_named("get_sam_group_entries(%s)",
 407                                           ent->domain_name)))
 408                 return False;
 409
 410         /* Free any existing group info */
 411
 412         SAFE_FREE(ent->sam_entries);
 413         ent->num_sam_entries = 0;
 414         ent->got_sam_entries = True;
 415
 416         /* Enumerate domain groups */
 417
 418         num_entries = 0;
 419
 420         if (!(domain = find_domain_from_name(ent->domain_name))) {
 421                 DEBUG(3, ("no such domain %s in get_sam_group_entries\n", ent->domain_name));
 422                 goto done;
 423         }
 424
 425         nt_status = domain->methods->enum_dom_groups(
 426                 domain, mem_ctx, &num_entries, &sam_grp_entries);
 427
 428         if (status && !NT_STATUS_IS_OK(nt_status))
 429                 *status = nt_status;
 430
 431         /* Copy entries into return buffer */
 432
 433         if (num_entries) {
 434                 name_list = malloc(sizeof(struct acct_info) * num_entries);
 435                 memcpy(name_list, sam_grp_entries,
 436                        num_entries * sizeof(struct acct_info));
 437         }
 438
 439         ent->num_sam_entries = num_entries;
 440
 441         /* Fill in remaining fields */
 442
 443         ent->sam_entries = name_list;
 444         ent->sam_entry_index = 0;
 445
 446         /* Return false if we got an error or no sam entries, true otherwise */
 447
 448         if (!NT_STATUS_IS_OK(nt_status))
 449                 result = False;
 450         else
 451                 result = (ent->num_sam_entries > 0);
 452
 453  done:
 454         talloc_destroy(mem_ctx);
 455
 456         return result;
 457 }
 458
 459 /* Fetch next group entry from ntdom database */
 460
 461 #define MAX_GETGRENT_GROUPS 500
 462
 463 enum winbindd_result winbindd_getgrent(struct winbindd_cli_state *state)
 464 {
 465         struct getent_state *ent;
 466         struct winbindd_gr *group_list = NULL;
 467         int num_groups, group_list_ndx = 0, i, gr_mem_list_len = 0;
 468         char *new_extra_data, *gr_mem_list = NULL;
 469
 470         DEBUG(3, ("[%5d]: getgrent\n", state->pid));
 471
 472         /* Check user has enabled this */
 473
 474         if (!lp_winbind_enum_groups())
 475                 return WINBINDD_ERROR;
 476
 477         num_groups = MIN(MAX_GETGRENT_GROUPS, state->request.data.num_entries);
 478
 479         if ((state->response.extra_data =
 480              malloc(num_groups * sizeof(struct winbindd_gr))) == NULL)
 481                 return WINBINDD_ERROR;
 482
 483         state->response.data.num_entries = 0;
 484
 485         group_list = (struct winbindd_gr *)state->response.extra_data;
 486
 487         if (!(ent = state->getgrent_state))
 488                 return WINBINDD_ERROR;
 489
 490         /* Start sending back groups */
 491
 492         for (i = 0; i < num_groups; i++) {
 493                 struct acct_info *name_list = NULL;
 494                 fstring domain_group_name;
 495                 uint32 result;
 496                 gid_t group_gid;
 497                 int gr_mem_len;
 498                 char *gr_mem, *new_gr_mem_list;
 499
 500                 /* Do we need to fetch another chunk of groups? */
 501
 502         tryagain:
 503
 504                 DEBUG(10, ("entry_index = %d, num_entries = %d\n",
 505                            ent->sam_entry_index, ent->num_sam_entries));
 506
 507                 if (ent->num_sam_entries == ent->sam_entry_index) {
 508                         struct getent_state *next_ent;
 509
 510                         /* is this the beginning ( == 0 ) or the end ? */
 511
 512                         if ( ent->sam_entry_index > 0 ) {
 513                                 DEBUG(10, ("end of getgrent: freeing state info for domain %s\n", ent->domain_name));
 514                                 SAFE_FREE(ent->sam_entries);
 515                                 next_ent = ent->next;
 516                                 DLIST_REMOVE(state->getgrent_state, ent);
 517                                 SAFE_FREE(ent);
 518                                 ent = next_ent;
 519                         }
 520
 521                         /* find the next domain's group entries */
 522
 523                         while(ent && !get_sam_group_entries(ent, NULL)) {
 524                                 DEBUG(10, ("freeing state info for domain %s\n", ent->domain_name));
 525
 526                                 /* Free state information for this domain */
 527
 528                                 SAFE_FREE(ent->sam_entries);
 529
 530                                 next_ent = ent->next;
 531                                 DLIST_REMOVE(state->getgrent_state, ent);
 532
 533                                 SAFE_FREE(ent);
 534                                 ent = next_ent;
 535                         }
 536
 537                         /* No more domains */
 538
 539                         if (!ent)
 540                                 break;
 541                 }
 542
 543                 name_list = ent->sam_entries;
 544
 545                 /* Lookup group info */
 546
 547                 if (!winbindd_idmap_get_gid_from_rid(
 548                         ent->domain_name,
 549                         name_list[ent->sam_entry_index].rid,
 550                         &group_gid)) {
 551
 552                         DEBUG(1, ("could not look up gid for group %s\n",
 553                                   name_list[ent->sam_entry_index].acct_name));
 554
 555                         ent->sam_entry_index++;
 556                         goto tryagain;
 557                 }
 558
 559                 DEBUG(10, ("got gid %d for group %x\n", group_gid,
 560                            name_list[ent->sam_entry_index].rid));
 561
 562                 /* Fill in group entry */
 563
 564                 fill_domain_username(domain_group_name, ent->domain_name,
 565                          name_list[ent->sam_entry_index].acct_name);
 566
 567                 result = fill_grent(&group_list[group_list_ndx],
 568                                     ent->domain_name,
 569                                     name_list[ent->sam_entry_index].acct_name,
 570                                     group_gid);
 571
 572                 /* Fill in group membership entry */
 573
 574                 if (result) {
 575                         struct winbindd_domain *domain;
 576
 577                         if (!(domain =
 578                               find_domain_from_name(ent->domain_name))) {
 579                                 DEBUG(3, ("No such domain %s in winbindd_getgrent\n", ent->domain_name));
 580                                 result = False;
 581                                 goto done;
 582                         }
 583
 584                         /* Get group membership */
 585
 586                         result = fill_grent_mem(
 587                                 domain,
 588                                 name_list[ent->sam_entry_index].rid,
 589                                 SID_NAME_DOM_GRP,
 590                                 &group_list[group_list_ndx].num_gr_mem,
 591                                 &gr_mem, &gr_mem_len);
 592                 }
 593
 594                 if (result) {
 595                         /* Append to group membership list */
 596                         new_gr_mem_list = Realloc(
 597                                 gr_mem_list,
 598                                 gr_mem_list_len + gr_mem_len);
 599
 600                         if (!new_gr_mem_list && (group_list[group_list_ndx].num_gr_mem != 0)) {
 601                                 DEBUG(0, ("out of memory\n"));
 602                                 SAFE_FREE(gr_mem_list);
 603                                 gr_mem_list_len = 0;
 604                                 break;
 605                         }
 606
 607                         DEBUG(10, ("list_len = %d, mem_len = %d\n",
 608                                    gr_mem_list_len, gr_mem_len));
 609
 610                         gr_mem_list = new_gr_mem_list;
 611
 612                         memcpy(&gr_mem_list[gr_mem_list_len], gr_mem,
 613                                gr_mem_len);
 614
 615                         SAFE_FREE(gr_mem);
 616
 617                         group_list[group_list_ndx].gr_mem_ofs =
 618                                 gr_mem_list_len;
 619
 620                         gr_mem_list_len += gr_mem_len;
 621                 }
 622
 623                 ent->sam_entry_index++;
 624
 625                 /* Add group to return list */
 626
 627                 if (result) {
 628
 629                         DEBUG(10, ("adding group num_entries = %d\n",
 630                                    state->response.data.num_entries));
 631
 632                         group_list_ndx++;
 633                         state->response.data.num_entries++;
 634
 635                         state->response.length +=
 636                                 sizeof(struct winbindd_gr);
 637
 638                 } else {
 639                         DEBUG(0, ("could not lookup domain group %s\n",
 640                                   domain_group_name));
 641                 }
 642         }
 643
 644         /* Copy the list of group memberships to the end of the extra data */
 645
 646         if (group_list_ndx == 0)
 647                 goto done;
 648
 649         new_extra_data = Realloc(
 650                 state->response.extra_data,
 651                 group_list_ndx * sizeof(struct winbindd_gr) + gr_mem_list_len);
 652
 653         if (!new_extra_data) {
 654                 DEBUG(0, ("out of memory\n"));
 655                 group_list_ndx = 0;
 656                 SAFE_FREE(state->response.extra_data);
 657                 SAFE_FREE(gr_mem_list);
 658
 659                 return WINBINDD_ERROR;
 660         }
 661
 662         state->response.extra_data = new_extra_data;
 663
 664         memcpy(&((char *)state->response.extra_data)
 665                [group_list_ndx * sizeof(struct winbindd_gr)],
 666                gr_mem_list, gr_mem_list_len);
 667
 668         SAFE_FREE(gr_mem_list);
 669
 670         state->response.length += gr_mem_list_len;
 671
 672         DEBUG(10, ("returning %d groups, length = %d\n",
 673                    group_list_ndx, gr_mem_list_len));
 674
 675         /* Out of domains */
 676
 677  done:
 678
 679         return (group_list_ndx > 0) ? WINBINDD_OK : WINBINDD_ERROR;
 680 }
 681
 682 /* List domain groups without mapping to unix ids */
 683
 684 enum winbindd_result winbindd_list_groups(struct winbindd_cli_state *state)
 685 {
 686         uint32 total_entries = 0;
 687         struct winbindd_domain *domain;
 688         char *extra_data = NULL;
 689         char *ted = NULL;
 690         int extra_data_len = 0, i;
 691
 692         DEBUG(3, ("[%5d]: list groups\n", state->pid));
 693
 694         /* Enumerate over trusted domains */
 695
 696         for (domain = domain_list(); domain; domain = domain->next) {
 697                 struct getent_state groups;
 698                 NTSTATUS status;
 699
 700                 ZERO_STRUCT(groups);
 701
 702                 /* Skip domains other than WINBINDD_DOMAIN environment
 703                    variable */
 704
 705                 if ((strcmp(state->request.domain, "") != 0) &&
 706                     !check_domain_env(state->request.domain, domain->name))
 707                         continue;
 708
 709                 /* Get list of sam groups */
 710
 711                 ZERO_STRUCT(groups);
 712                 fstrcpy(groups.domain_name, domain->name);
 713
 714                 if (!get_sam_group_entries(&groups, &status)) {
 715                         if (!NT_STATUS_IS_OK(status))
 716                                 state->response.nt_status = NT_STATUS_V(status);
 717                         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED))
 718                                 continue;
 719                 }
 720
 721                 if (groups.num_sam_entries == 0) {
 722                         /* this domain is empty or in an error state */
 723                         continue;
 724                 }
 725
 726                 /* keep track the of the total number of groups seen so
 727                    far over all domains */
 728
 729                 total_entries += groups.num_sam_entries;
 730
 731                 /* Allocate some memory for extra data.  Note that we limit
 732                    account names to sizeof(fstring) = 128 characters.  */
 733
 734                 ted = Realloc(extra_data, sizeof(fstring) * total_entries);
 735
 736                 if (!ted) {
 737                         DEBUG(0,("failed to enlarge buffer!\n"));
 738                         SAFE_FREE(extra_data);
 739                         return WINBINDD_ERROR;
 740                 } else
 741                         extra_data = ted;
 742
 743                 /* Pack group list into extra data fields */
 744                 for (i = 0; i < groups.num_sam_entries; i++) {
 745                         char *group_name = ((struct acct_info *)
 746                                             groups.sam_entries)[i].acct_name;
 747                         fstring name;
 748
 749                         fill_domain_username(name, domain->name, group_name);
 750                         /* Append to extra data */
 751                         memcpy(&extra_data[extra_data_len], name,
 752                                strlen(name));
 753                         extra_data_len += strlen(name);
 754                         extra_data[extra_data_len++] = ',';
 755                 }
 756
 757                 free(groups.sam_entries);
 758         }
 759
 760         /* Assign extra_data fields in response structure */
 761         if (extra_data) {
 762                 extra_data[extra_data_len - 1] = '\0';
 763                 state->response.extra_data = extra_data;
 764                 state->response.length += extra_data_len;
 765         }
 766
 767         /* No domains may have responded but that's still OK so don't
 768            return an error. */
 769
 770         return WINBINDD_OK;
 771 }
 772
 773 /* Get user supplementary groups.  This is much quicker than trying to
 774    invert the groups database. */
 775
 776 enum winbindd_result winbindd_getgroups(struct winbindd_cli_state *state)
 777 {
 778         fstring name_domain, name_user;
 779         DOM_SID user_sid;
 780         enum SID_NAME_USE name_type;
 781         uint32 user_rid, num_groups, num_gids;
 782         NTSTATUS status;
 783         uint32 *user_gids;
 784         struct winbindd_domain *domain;
 785         enum winbindd_result result = WINBINDD_ERROR;
 786         gid_t *gid_list;
 787         int i;
 788         TALLOC_CTX *mem_ctx;
 789
 790         DEBUG(3, ("[%5d]: getgroups %s\n", state->pid,
 791                   state->request.data.username));
 792
 793         if (!(mem_ctx = talloc_init_named("winbindd_getgroups(%s)",
 794                                           state->request.data.username)))
 795                 return WINBINDD_ERROR;
 796
 797         /* Parse domain and username */
 798
 799         if (!parse_domain_user(state->request.data.username, name_domain,
 800                           name_user))
 801                 goto done;
 802
 803         /* Get info for the domain */
 804
 805         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 806                 DEBUG(0, ("could not find domain entry for domain %s\n",
 807                           name_domain));
 808                 goto done;
 809         }
 810
 811         /* Get rid and name type from name.  The following costs 1 packet */
 812
 813         if (!winbindd_lookup_sid_by_name(domain, name_user, &user_sid,
 814                                          &name_type)) {
 815                 DEBUG(1, ("user '%s' does not exist\n", name_user));
 816                 goto done;
 817         }
 818
 819         if (name_type != SID_NAME_USER) {
 820                 DEBUG(1, ("name '%s' is not a user name: %d\n",
 821                           name_user, name_type));
 822                 goto done;
 823         }
 824
 825         sid_split_rid(&user_sid, &user_rid);
 826
 827         status = domain->methods->lookup_usergroups(domain, mem_ctx, user_rid, &num_groups, &user_gids);
 828         if (!NT_STATUS_IS_OK(status)) goto done;
 829
 830         /* Copy data back to client */
 831
 832         num_gids = 0;
 833         gid_list = malloc(sizeof(gid_t) * num_groups);
 834
 835         if (state->response.extra_data)
 836                 goto done;
 837
 838         for (i = 0; i < num_groups; i++) {
 839                 if (!winbindd_idmap_get_gid_from_rid(domain->name,
 840                                                      user_gids[i],
 841                                                      &gid_list[num_gids])) {
 842
 843                         DEBUG(1, ("unable to convert group rid %d to gid\n",
 844                                   user_gids[i]));
 845                         continue;
 846                 }
 847
 848                 num_gids++;
 849         }
 850
 851         state->response.data.num_entries = num_gids;
 852         state->response.extra_data = gid_list;
 853         state->response.length += num_gids * sizeof(gid_t);
 854
 855         result = WINBINDD_OK;
 856
 857  done:
 858
 859         talloc_destroy(mem_ctx);
 860
 861         return result;
 862 }