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 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_WINBIND
  28
  29 /***************************************************************
  30  Empty static struct for negative caching.
  31 ****************************************************************/
  32
  33 /* Fill a grent structure from various other information */
  34
  35 static BOOL fill_grent(struct winbindd_gr *gr, const char *dom_name,
  36                        const char *gr_name, gid_t unix_gid)
  37 {
  38         fstring full_group_name;
  39         /* Fill in uid/gid */
  40         fill_domain_username(full_group_name, dom_name, gr_name);
  41
  42         gr->gr_gid = unix_gid;
  43
  44         /* Group name and password */
  45
  46         safe_strcpy(gr->gr_name, full_group_name, sizeof(gr->gr_name) - 1);
  47         safe_strcpy(gr->gr_passwd, "x", sizeof(gr->gr_passwd) - 1);
  48
  49         return True;
  50 }
  51
  52 /* Fill in the group membership field of a NT group given by group_rid */
  53
  54 static BOOL fill_grent_mem(struct winbindd_domain *domain,
  55                            uint32 group_rid,
  56                            enum SID_NAME_USE group_name_type,
  57                            int *num_gr_mem, char **gr_mem, int *gr_mem_len)
  58 {
  59         uint32 *rid_mem = NULL, num_names = 0;
  60         uint32 *name_types = NULL;
  61         int buf_len, buf_ndx, i;
  62         char **names = NULL, *buf;
  63         BOOL result = False;
  64         TALLOC_CTX *mem_ctx;
  65         NTSTATUS status;
  66
  67         if (!(mem_ctx = talloc_init_named("fill_grent_mem(%s)", domain->name)))
  68                 return False;
  69
  70         /* Initialise group membership information */
  71
  72         DEBUG(10, ("group %s rid 0x%x\n", domain ? domain->name : "NULL",
  73                    group_rid));
  74
  75         *num_gr_mem = 0;
  76
  77         if (group_name_type != SID_NAME_DOM_GRP) {
  78                 DEBUG(1, ("rid %d in domain %s isn't a domain group\n",
  79                           group_rid, domain->name));
  80                 goto done;
  81         }
  82
  83         /* Lookup group members */
  84         status = domain->methods->lookup_groupmem(domain, mem_ctx, group_rid, &num_names,
  85                                                   &rid_mem, &names, &name_types);
  86         if (!NT_STATUS_IS_OK(status)) {
  87                 DEBUG(1, ("could not lookup membership for group rid %d in domain %s (error: %s)\n",
  88                           group_rid, domain->name, nt_errstr(status)));
  89
  90                 goto done;
  91         }
  92
  93         DEBUG(10, ("looked up %d names\n", num_names));
  94
  95         if (DEBUGLEVEL >= 10) {
  96                 for (i = 0; i < num_names; i++)
  97                         DEBUG(10, ("\t%20s %x %d\n", names[i], rid_mem[i],
  98                                    name_types[i]));
  99         }
 100
 101         /* Add members to list */
 102
 103         buf = NULL;
 104         buf_len = buf_ndx = 0;
 105
 106  again:
 107
 108         for (i = 0; i < num_names; i++) {
 109                 char *the_name;
 110                 fstring name;
 111                 int len;
 112
 113                 the_name = names[i];
 114
 115                 DEBUG(10, ("processing name %s\n", the_name));
 116
 117                 /* FIXME: need to cope with groups within groups.  These
 118                    occur in Universal groups on a Windows 2000 native mode
 119                    server. */
 120
 121                 if (name_types[i] != SID_NAME_USER) {
 122                         DEBUG(3, ("name %s isn't a domain user\n", the_name));
 123                         continue;
 124                 }
 125
 126                 /* Don't bother with machine accounts */
 127
 128                 if (the_name[strlen(the_name) - 1] == '$') {
 129                         DEBUG(10, ("%s is machine account\n", the_name));
 130                         continue;
 131                 }
 132
 133                 /* Append domain name */
 134
 135                 fill_domain_username(name, domain->name, the_name);
 136
 137                 len = strlen(name);
 138
 139                 /* Add to list or calculate buffer length */
 140
 141                 if (!buf) {
 142                         buf_len += len + 1; /* List is comma separated */
 143                         (*num_gr_mem)++;
 144                         DEBUG(10, ("buf_len + %d = %d\n", len + 1, buf_len));
 145                 } else {
 146                         DEBUG(10, ("appending %s at ndx %d\n", name, len));
 147                         safe_strcpy(&buf[buf_ndx], name, len);
 148                         buf_ndx += len;
 149                         buf[buf_ndx] = ',';
 150                         buf_ndx++;
 151                 }
 152         }
 153
 154         /* Allocate buffer */
 155
 156         if (!buf && buf_len != 0) {
 157                 if (!(buf = malloc(buf_len))) {
 158                         DEBUG(1, ("out of memory\n"));
 159                         result = False;
 160                         goto done;
 161                 }
 162                 memset(buf, 0, buf_len);
 163                 goto again;
 164         }
 165
 166         if (buf && buf_ndx > 0) {
 167                 buf[buf_ndx - 1] = '\0';
 168         }
 169
 170         *gr_mem = buf;
 171         *gr_mem_len = buf_len;
 172
 173         DEBUG(10, ("num_mem = %d, len = %d, mem = %s\n", *num_gr_mem,
 174                    buf_len, *num_gr_mem ? buf : "NULL"));
 175         result = True;
 176
 177 done:
 178
 179         talloc_destroy(mem_ctx);
 180
 181         DEBUG(10, ("fill_grent_mem returning %d\n", result));
 182
 183         return result;
 184 }
 185
 186 /* Return a group structure from a group name */
 187
 188 enum winbindd_result winbindd_getgrnam(struct winbindd_cli_state *state)
 189 {
 190         DOM_SID group_sid;
 191         struct winbindd_domain *domain;
 192         enum SID_NAME_USE name_type;
 193         uint32 group_rid;
 194         fstring name_domain, name_group;
 195         char *tmp, *gr_mem;
 196         gid_t gid;
 197         int gr_mem_len;
 198
 199         /* Ensure null termination */
 200         state->request.data.groupname[sizeof(state->request.data.groupname)-1]='\0';
 201
 202         DEBUG(3, ("[%5d]: getgrnam %s\n", state->pid,
 203                   state->request.data.groupname));
 204
 205         /* Parse domain and groupname */
 206
 207         memset(name_group, 0, sizeof(fstring));
 208
 209         tmp = state->request.data.groupname;
 210         if (!parse_domain_user(tmp, name_domain, name_group))
 211                 return WINBINDD_ERROR;
 212
 213         /* Get info for the domain */
 214
 215         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 216                 DEBUG(0, ("could not get domain sid for domain %s\n",
 217                           name_domain));
 218                 return WINBINDD_ERROR;
 219         }
 220
 221         /* Get rid and name type from name */
 222
 223         if (!winbindd_lookup_sid_by_name(domain, name_group, &group_sid,
 224                                          &name_type)) {
 225                 DEBUG(1, ("group %s in domain %s does not exist\n",
 226                           name_group, name_domain));
 227                 return WINBINDD_ERROR;
 228         }
 229
 230         if ((name_type != SID_NAME_ALIAS) && (name_type != SID_NAME_DOM_GRP)) {
 231                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n",
 232                           name_group, name_type));
 233                 return WINBINDD_ERROR;
 234         }
 235
 236         /* Fill in group structure */
 237         if (!sid_peek_check_rid(&domain->sid, &group_sid, &group_rid))
 238                 return WINBINDD_ERROR;
 239
 240         if (!winbindd_idmap_get_gid_from_sid(&group_sid, &gid)) {
 241                 DEBUG(1, ("error converting unix gid to sid\n"));
 242                 return WINBINDD_ERROR;
 243         }
 244
 245         if (!fill_grent(&state->response.data.gr, name_domain,
 246                         name_group, gid) ||
 247             !fill_grent_mem(domain, group_rid, name_type,
 248                             &state->response.data.gr.num_gr_mem,
 249                             &gr_mem, &gr_mem_len)) {
 250                 return WINBINDD_ERROR;
 251         }
 252
 253         /* Group membership lives at start of extra data */
 254
 255         state->response.data.gr.gr_mem_ofs = 0;
 256
 257         state->response.length += gr_mem_len;
 258         state->response.extra_data = gr_mem;
 259
 260         return WINBINDD_OK;
 261 }
 262
 263 /* Return a group structure from a gid number */
 264
 265 enum winbindd_result winbindd_getgrgid(struct winbindd_cli_state *state)
 266 {
 267         struct winbindd_domain *domain;
 268         DOM_SID group_sid;
 269         enum SID_NAME_USE name_type;
 270         fstring dom_name;
 271         fstring group_name;
 272         uint32 group_rid;
 273         int gr_mem_len;
 274         char *gr_mem;
 275
 276         DEBUG(3, ("[%5d]: getgrgid %d\n", state->pid,
 277                   state->request.data.gid));
 278
 279         /* Bug out if the gid isn't in the winbind range */
 280
 281         if ((state->request.data.gid < server_state.gid_low) ||
 282             (state->request.data.gid > server_state.gid_high))
 283                 return WINBINDD_ERROR;
 284
 285         /* Get rid from gid */
 286
 287         if (!winbindd_idmap_get_rid_from_gid(state->request.data.gid,
 288                                              &group_rid, &domain)) {
 289                 DEBUG(1, ("could not convert gid %d to rid\n",
 290                           state->request.data.gid));
 291                 return WINBINDD_ERROR;
 292         }
 293
 294         /* Get sid from gid */
 295
 296         sid_copy(&group_sid, &domain->sid);
 297         sid_append_rid(&group_sid, group_rid);
 298
 299         if (!winbindd_lookup_name_by_sid(&group_sid, dom_name, group_name, &name_type)) {
 300                 DEBUG(1, ("could not lookup sid\n"));
 301                 return WINBINDD_ERROR;
 302         }
 303
 304         if (!((name_type == SID_NAME_ALIAS) ||
 305               (name_type == SID_NAME_DOM_GRP))) {
 306                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n",
 307                           group_name, name_type));
 308                 return WINBINDD_ERROR;
 309         }
 310
 311         /* Fill in group structure */
 312
 313         if (!fill_grent(&state->response.data.gr, dom_name, group_name,
 314                         state->request.data.gid) ||
 315             !fill_grent_mem(domain, group_rid, name_type,
 316                             &state->response.data.gr.num_gr_mem,
 317                             &gr_mem, &gr_mem_len))
 318                 return WINBINDD_ERROR;
 319
 320         /* Group membership lives at start of extra data */
 321
 322         state->response.data.gr.gr_mem_ofs = 0;
 323
 324         state->response.length += gr_mem_len;
 325         state->response.extra_data = gr_mem;
 326
 327         return WINBINDD_OK;
 328 }
 329
 330 /*
 331  * set/get/endgrent functions
 332  */
 333
 334 /* "Rewind" file pointer for group database enumeration */
 335
 336 enum winbindd_result winbindd_setgrent(struct winbindd_cli_state *state)
 337 {
 338         struct winbindd_domain *domain;
 339
 340         DEBUG(3, ("[%5d]: setgrent\n", state->pid));
 341
 342         /* Check user has enabled this */
 343
 344         if (!lp_winbind_enum_groups())
 345                 return WINBINDD_ERROR;
 346
 347         /* Free old static data if it exists */
 348
 349         if (state->getgrent_state != NULL) {
 350                 free_getent_state(state->getgrent_state);
 351                 state->getgrent_state = NULL;
 352         }
 353
 354         /* Create sam pipes for each domain we know about */
 355
 356         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 357                 struct getent_state *domain_state;
 358
 359                 /* Skip domains other than WINBINDD_DOMAIN environment
 360                    variable */
 361
 362                 if ((strcmp(state->request.domain, "") != 0) &&
 363                     !check_domain_env(state->request.domain, domain->name))
 364                         continue;
 365
 366                 /* Create a state record for this domain */
 367
 368                 if ((domain_state = (struct getent_state *)
 369                      malloc(sizeof(struct getent_state))) == NULL) {
 370                         DEBUG(1, ("winbindd_setgrent: malloc failed for domain_state!\n"));
 371                         return WINBINDD_ERROR;
 372                 }
 373
 374                 ZERO_STRUCTP(domain_state);
 375
 376                 fstrcpy(domain_state->domain_name, domain->name);
 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, *tmp_name_list = NULL;
 410         TALLOC_CTX *mem_ctx;
 411         BOOL result = False;
 412         struct acct_info *sam_grp_entries = NULL;
 413         struct winbindd_domain *domain;
 414
 415         if (ent->got_sam_entries)
 416                 return False;
 417
 418         if (!(mem_ctx = talloc_init_named("get_sam_group_entries(%s)",
 419                                           ent->domain_name))) {
 420                 DEBUG(1, ("get_sam_group_entries: could not create talloc context!\n"));
 421                 return False;
 422         }
 423
 424         /* Free any existing group info */
 425
 426         SAFE_FREE(ent->sam_entries);
 427         ent->num_sam_entries = 0;
 428         ent->got_sam_entries = True;
 429
 430         /* Enumerate domain groups */
 431
 432         num_entries = 0;
 433
 434         if (!(domain = find_domain_from_name(ent->domain_name))) {
 435                 DEBUG(3, ("no such domain %s in get_sam_group_entries\n", ent->domain_name));
 436                 goto done;
 437         }
 438
 439         /* always get the domain global groups */
 440
 441         status = domain->methods->enum_dom_groups(domain, mem_ctx, &num_entries, &sam_grp_entries);
 442
 443         if (!NT_STATUS_IS_OK(status)) {
 444                 DEBUG(3, ("get_sam_group_entries: could not enumerate domain groups! Error: %s", nt_errstr(status)));
 445                 result = False;
 446                 goto done;
 447         }
 448
 449         /* Copy entries into return buffer */
 450
 451         if (num_entries) {
 452                 if ( !(name_list = malloc(sizeof(struct acct_info) * num_entries)) ) {
 453                         DEBUG(0,("get_sam_group_entries: Failed to malloc memory for %d domain groups!\n",
 454                                 num_entries));
 455                         result = False;
 456                         goto done;
 457                 }
 458                 memcpy( name_list, sam_grp_entries, num_entries * sizeof(struct acct_info) );
 459         }
 460
 461         ent->num_sam_entries = num_entries;
 462
 463         /* get the domain local groups if we are a member of
 464            a native win2k domain */
 465
 466         if ( domain->native_mode && domain->methods->enum_local_groups )
 467         {
 468                 DEBUG(4,("get_sam_group_entries: Native Mode 2k domain; enumerating local groups as well\n"));
 469
 470                 status = domain->methods->enum_local_groups(domain, mem_ctx, &num_entries, &sam_grp_entries);
 471
 472                 if ( !NT_STATUS_IS_OK(status) ) {
 473                         DEBUG(3,("get_sam_group_entries: Failed to enumerate domain local groups!\n"));
 474                         num_entries = 0;
 475                 }
 476                 else
 477                         DEBUG(4,("get_sam_group_entries: Returned %d local groups\n", num_entries));
 478
 479                 /* Copy entries into return buffer */
 480
 481                 if ( num_entries ) {
 482                         if ( !(tmp_name_list = Realloc( name_list, sizeof(struct acct_info) * (ent->num_sam_entries+num_entries))) )
 483                         {
 484                                 DEBUG(0,("get_sam_group_entries: Failed to realloc more memory for %d local groups!\n",
 485                                         num_entries));
 486                                 result = False;
 487                                 SAFE_FREE( name_list );
 488                                 goto done;
 489                         }
 490
 491                         name_list = tmp_name_list;
 492
 493                         memcpy( &name_list[ent->num_sam_entries], sam_grp_entries,
 494                                 num_entries * sizeof(struct acct_info) );
 495                 }
 496
 497                 ent->num_sam_entries += num_entries;
 498         }
 499
 500
 501         /* Fill in remaining fields */
 502
 503         ent->sam_entries = name_list;
 504         ent->sam_entry_index = 0;
 505
 506         result = (ent->num_sam_entries > 0);
 507
 508  done:
 509         talloc_destroy(mem_ctx);
 510
 511         return result;
 512 }
 513
 514 /* Fetch next group entry from ntdom database */
 515
 516 #define MAX_GETGRENT_GROUPS 500
 517
 518 enum winbindd_result winbindd_getgrent(struct winbindd_cli_state *state)
 519 {
 520         struct getent_state *ent;
 521         struct winbindd_gr *group_list = NULL;
 522         int num_groups, group_list_ndx = 0, i, gr_mem_list_len = 0;
 523         char *new_extra_data, *gr_mem_list = NULL;
 524
 525         DEBUG(3, ("[%5d]: getgrent\n", state->pid));
 526
 527         /* Check user has enabled this */
 528
 529         if (!lp_winbind_enum_groups())
 530                 return WINBINDD_ERROR;
 531
 532         num_groups = MIN(MAX_GETGRENT_GROUPS, state->request.data.num_entries);
 533
 534         if ((state->response.extra_data =
 535              malloc(num_groups * sizeof(struct winbindd_gr))) == NULL)
 536                 return WINBINDD_ERROR;
 537
 538         state->response.data.num_entries = 0;
 539
 540         group_list = (struct winbindd_gr *)state->response.extra_data;
 541
 542         if (!(ent = state->getgrent_state))
 543                 return WINBINDD_ERROR;
 544
 545         /* Start sending back groups */
 546
 547         for (i = 0; i < num_groups; i++) {
 548                 struct acct_info *name_list = NULL;
 549                 fstring domain_group_name;
 550                 uint32 result;
 551                 gid_t group_gid;
 552                 int gr_mem_len;
 553                 char *gr_mem, *new_gr_mem_list;
 554
 555                 /* Do we need to fetch another chunk of groups? */
 556
 557         tryagain:
 558
 559                 DEBUG(10, ("entry_index = %d, num_entries = %d\n",
 560                            ent->sam_entry_index, ent->num_sam_entries));
 561
 562                 if (ent->num_sam_entries == ent->sam_entry_index) {
 563
 564                         while(ent && !get_sam_group_entries(ent)) {
 565                                 struct getent_state *next_ent;
 566
 567                                 DEBUG(10, ("freeing state info for domain %s\n", ent->domain_name));
 568
 569                                 /* Free state information for this domain */
 570
 571                                 SAFE_FREE(ent->sam_entries);
 572
 573                                 next_ent = ent->next;
 574                                 DLIST_REMOVE(state->getgrent_state, ent);
 575
 576                                 SAFE_FREE(ent);
 577                                 ent = next_ent;
 578                         }
 579
 580                         /* No more domains */
 581
 582                         if (!ent)
 583                                 break;
 584                 }
 585
 586                 name_list = ent->sam_entries;
 587
 588                 /* Lookup group info */
 589
 590                 if (!winbindd_idmap_get_gid_from_rid(
 591                         ent->domain_name,
 592                         name_list[ent->sam_entry_index].rid,
 593                         &group_gid)) {
 594
 595                         DEBUG(1, ("could not look up gid for group %s\n",
 596                                   name_list[ent->sam_entry_index].acct_name));
 597
 598                         ent->sam_entry_index++;
 599                         goto tryagain;
 600                 }
 601
 602                 DEBUG(10, ("got gid %d for group %x\n", group_gid,
 603                            name_list[ent->sam_entry_index].rid));
 604
 605                 /* Fill in group entry */
 606
 607                 fill_domain_username(domain_group_name, ent->domain_name,
 608                          name_list[ent->sam_entry_index].acct_name);
 609
 610                 result = fill_grent(&group_list[group_list_ndx],
 611                                     ent->domain_name,
 612                                     name_list[ent->sam_entry_index].acct_name,
 613                                     group_gid);
 614
 615                 /* Fill in group membership entry */
 616
 617                 if (result) {
 618                         struct winbindd_domain *domain;
 619
 620                         if (!(domain =
 621                               find_domain_from_name(ent->domain_name))) {
 622                                 DEBUG(3, ("No such domain %s in winbindd_getgrent\n", ent->domain_name));
 623                                 result = False;
 624                                 goto done;
 625                         }
 626
 627                         group_list[group_list_ndx].num_gr_mem = 0;
 628                         gr_mem = NULL;
 629                         gr_mem_len = 0;
 630
 631                         /* Get group membership */
 632                         if (state->request.cmd == WINBINDD_GETGRLST) {
 633                                 result = True;
 634                         } else {
 635                                 result = fill_grent_mem(
 636                                         domain,
 637                                         name_list[ent->sam_entry_index].rid,
 638                                         SID_NAME_DOM_GRP,
 639                                         &group_list[group_list_ndx].num_gr_mem,
 640                                         &gr_mem, &gr_mem_len);
 641                         }
 642                 }
 643
 644                 if (result) {
 645                         /* Append to group membership list */
 646                         new_gr_mem_list = Realloc(
 647                                 gr_mem_list,
 648                                 gr_mem_list_len + gr_mem_len);
 649
 650                         if (!new_gr_mem_list && (group_list[group_list_ndx].num_gr_mem != 0)) {
 651                                 DEBUG(0, ("out of memory\n"));
 652                                 SAFE_FREE(gr_mem_list);
 653                                 gr_mem_list_len = 0;
 654                                 break;
 655                         }
 656
 657                         DEBUG(10, ("list_len = %d, mem_len = %d\n",
 658                                    gr_mem_list_len, gr_mem_len));
 659
 660                         gr_mem_list = new_gr_mem_list;
 661
 662                         memcpy(&gr_mem_list[gr_mem_list_len], gr_mem,
 663                                gr_mem_len);
 664
 665                         SAFE_FREE(gr_mem);
 666
 667                         group_list[group_list_ndx].gr_mem_ofs =
 668                                 gr_mem_list_len;
 669
 670                         gr_mem_list_len += gr_mem_len;
 671                 }
 672
 673                 ent->sam_entry_index++;
 674
 675                 /* Add group to return list */
 676
 677                 if (result) {
 678
 679                         DEBUG(10, ("adding group num_entries = %d\n",
 680                                    state->response.data.num_entries));
 681
 682                         group_list_ndx++;
 683                         state->response.data.num_entries++;
 684
 685                         state->response.length +=
 686                                 sizeof(struct winbindd_gr);
 687
 688                 } else {
 689                         DEBUG(0, ("could not lookup domain group %s\n",
 690                                   domain_group_name));
 691                 }
 692         }
 693
 694         /* Copy the list of group memberships to the end of the extra data */
 695
 696         if (group_list_ndx == 0)
 697                 goto done;
 698
 699         new_extra_data = Realloc(
 700                 state->response.extra_data,
 701                 group_list_ndx * sizeof(struct winbindd_gr) + gr_mem_list_len);
 702
 703         if (!new_extra_data) {
 704                 DEBUG(0, ("out of memory\n"));
 705                 group_list_ndx = 0;
 706                 SAFE_FREE(state->response.extra_data);
 707                 SAFE_FREE(gr_mem_list);
 708
 709                 return WINBINDD_ERROR;
 710         }
 711
 712         state->response.extra_data = new_extra_data;
 713
 714         memcpy(&((char *)state->response.extra_data)
 715                [group_list_ndx * sizeof(struct winbindd_gr)],
 716                gr_mem_list, gr_mem_list_len);
 717
 718         SAFE_FREE(gr_mem_list);
 719
 720         state->response.length += gr_mem_list_len;
 721
 722         DEBUG(10, ("returning %d groups, length = %d\n",
 723                    group_list_ndx, gr_mem_list_len));
 724
 725         /* Out of domains */
 726
 727  done:
 728
 729         return (group_list_ndx > 0) ? WINBINDD_OK : WINBINDD_ERROR;
 730 }
 731
 732 /* List domain groups without mapping to unix ids */
 733
 734 enum winbindd_result winbindd_list_groups(struct winbindd_cli_state *state)
 735 {
 736         uint32 total_entries = 0;
 737         struct winbindd_domain *domain;
 738         char *extra_data = NULL;
 739         char *ted = NULL;
 740         int extra_data_len = 0, i;
 741
 742         DEBUG(3, ("[%5d]: list groups\n", state->pid));
 743
 744         /* Enumerate over trusted domains */
 745
 746         for (domain = domain_list(); domain; domain = domain->next) {
 747                 struct getent_state groups;
 748
 749                 ZERO_STRUCT(groups);
 750
 751                 /* Skip domains other than WINBINDD_DOMAIN environment
 752                    variable */
 753                 if ((strcmp(state->request.domain, "") != 0) &&
 754                     !check_domain_env(state->request.domain, domain->name))
 755                         continue;
 756
 757                 /* Get list of sam groups */
 758                 ZERO_STRUCT(groups);
 759                 fstrcpy(groups.domain_name, domain->name);
 760
 761                 get_sam_group_entries(&groups);
 762
 763                 if (groups.num_sam_entries == 0) {
 764                         /* this domain is empty or in an error state */
 765                         continue;
 766                 }
 767
 768                 /* keep track the of the total number of groups seen so
 769                    far over all domains */
 770                 total_entries += groups.num_sam_entries;
 771
 772                 /* Allocate some memory for extra data.  Note that we limit
 773                    account names to sizeof(fstring) = 128 characters.  */
 774                 ted = Realloc(extra_data, sizeof(fstring) * total_entries);
 775
 776                 if (!ted) {
 777                         DEBUG(0,("failed to enlarge buffer!\n"));
 778                         SAFE_FREE(extra_data);
 779                         return WINBINDD_ERROR;
 780                 } else
 781                         extra_data = ted;
 782
 783                 /* Pack group list into extra data fields */
 784                 for (i = 0; i < groups.num_sam_entries; i++) {
 785                         char *group_name = ((struct acct_info *)
 786                                             groups.sam_entries)[i].acct_name;
 787                         fstring name;
 788
 789                         fill_domain_username(name, domain->name, group_name);
 790                         /* Append to extra data */
 791                         memcpy(&extra_data[extra_data_len], name,
 792                                strlen(name));
 793                         extra_data_len += strlen(name);
 794                         extra_data[extra_data_len++] = ',';
 795                 }
 796
 797                 free(groups.sam_entries);
 798         }
 799
 800         /* Assign extra_data fields in response structure */
 801         if (extra_data) {
 802                 extra_data[extra_data_len - 1] = '\0';
 803                 state->response.extra_data = extra_data;
 804                 state->response.length += extra_data_len;
 805         }
 806
 807         /* No domains may have responded but that's still OK so don't
 808            return an error. */
 809
 810         return WINBINDD_OK;
 811 }
 812
 813 /* Get user supplementary groups.  This is much quicker than trying to
 814    invert the groups database. */
 815
 816 enum winbindd_result winbindd_getgroups(struct winbindd_cli_state *state)
 817 {
 818         fstring name_domain, name_user;
 819         DOM_SID user_sid;
 820         enum SID_NAME_USE name_type;
 821         uint32 user_rid, num_groups, num_gids;
 822         NTSTATUS status;
 823         uint32 *user_gids;
 824         struct winbindd_domain *domain;
 825         enum winbindd_result result = WINBINDD_ERROR;
 826         gid_t *gid_list;
 827         int i;
 828         TALLOC_CTX *mem_ctx;
 829
 830         /* Ensure null termination */
 831         state->request.data.username[sizeof(state->request.data.username)-1]='\0';
 832
 833         DEBUG(3, ("[%5d]: getgroups %s\n", state->pid,
 834                   state->request.data.username));
 835
 836         if (!(mem_ctx = talloc_init_named("winbindd_getgroups(%s)",
 837                                           state->request.data.username)))
 838                 return WINBINDD_ERROR;
 839
 840         /* Parse domain and username */
 841
 842         if (!parse_domain_user(state->request.data.username, name_domain,
 843                           name_user))
 844                 goto done;
 845
 846         /* Get info for the domain */
 847
 848         if ((domain = find_domain_from_name(name_domain)) == NULL) {
 849                 DEBUG(0, ("could not find domain entry for domain %s\n",
 850                           name_domain));
 851                 goto done;
 852         }
 853
 854         /* Get rid and name type from name.  The following costs 1 packet */
 855
 856         if (!winbindd_lookup_sid_by_name(domain, name_user, &user_sid,
 857                                          &name_type)) {
 858                 DEBUG(1, ("user '%s' does not exist\n", name_user));
 859                 goto done;
 860         }
 861
 862         if (name_type != SID_NAME_USER) {
 863                 DEBUG(1, ("name '%s' is not a user name: %d\n",
 864                           name_user, name_type));
 865                 goto done;
 866         }
 867
 868         sid_split_rid(&user_sid, &user_rid);
 869
 870         status = domain->methods->lookup_usergroups(domain, mem_ctx, user_rid, &num_groups, &user_gids);
 871         if (!NT_STATUS_IS_OK(status)) goto done;
 872
 873         /* Copy data back to client */
 874
 875         num_gids = 0;
 876         gid_list = malloc(sizeof(gid_t) * num_groups);
 877
 878         if (state->response.extra_data)
 879                 goto done;
 880
 881         for (i = 0; i < num_groups; i++) {
 882                 if (!winbindd_idmap_get_gid_from_rid(domain->name,
 883                                                      user_gids[i],
 884                                                      &gid_list[num_gids])) {
 885
 886                         DEBUG(1, ("unable to convert group rid %d to gid\n",
 887                                   user_gids[i]));
 888                         continue;
 889                 }
 890
 891                 num_gids++;
 892         }
 893
 894         state->response.data.num_entries = num_gids;
 895         state->response.extra_data = gid_list;
 896         state->response.length += num_gids * sizeof(gid_t);
 897
 898         result = WINBINDD_OK;
 899
 900  done:
 901
 902         talloc_destroy(mem_ctx);
 903
 904         return result;
 905 }