source/nsswitch/winbindd_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon for ntdom nss module
   5
   6    Copyright (C) Tim Potter 2000-2001
   7    Copyright (C) 2001 by Martin Pool <mbp@samba.org>
   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 "includes.h"
  25 #include "winbindd.h"
  26
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_WINBIND
  29
  30 /**
  31  * @file winbindd_util.c
  32  *
  33  * Winbind daemon for NT domain authentication nss module.
  34  **/
  35
  36
  37 /**
  38  * Used to clobber name fields that have an undefined value.
  39  *
  40  * Correct code should never look at a field that has this value.
  41  **/
  42
  43 static const fstring name_deadbeef = "<deadbeef>";
  44
  45 /* The list of trusted domains.  Note that the list can be deleted and
  46    recreated using the init_domain_list() function so pointers to
  47    individual winbindd_domain structures cannot be made.  Keep a copy of
  48    the domain name instead. */
  49
  50 static struct winbindd_domain *_domain_list;
  51
  52 /**
  53    When was the last scan of trusted domains done?
  54
  55    0 == not ever
  56 */
  57
  58 static time_t last_trustdom_scan;
  59
  60 struct winbindd_domain *domain_list(void)
  61 {
  62         /* Initialise list */
  63
  64         if ((!_domain_list) && (!init_domain_list())) {
  65                 smb_panic("Init_domain_list failed\n");
  66         }
  67
  68         return _domain_list;
  69 }
  70
  71 /* Free all entries in the trusted domain list */
  72
  73 void free_domain_list(void)
  74 {
  75         struct winbindd_domain *domain = _domain_list;
  76
  77         while(domain) {
  78                 struct winbindd_domain *next = domain->next;
  79
  80                 DLIST_REMOVE(_domain_list, domain);
  81                 SAFE_FREE(domain);
  82                 domain = next;
  83         }
  84 }
  85
  86 static BOOL is_internal_domain(const DOM_SID *sid)
  87 {
  88         if (sid == NULL)
  89                 return False;
  90
  91         return (sid_check_is_domain(sid) || sid_check_is_builtin(sid));
  92 }
  93
  94 static BOOL is_in_internal_domain(const DOM_SID *sid)
  95 {
  96         if (sid == NULL)
  97                 return False;
  98
  99         return (sid_check_is_in_our_domain(sid) || sid_check_is_in_builtin(sid));
 100 }
 101
 102
 103 /* Add a trusted domain to our list of domains */
 104 static struct winbindd_domain *add_trusted_domain(const char *domain_name, const char *alt_name,
 105                                                   struct winbindd_methods *methods,
 106                                                   const DOM_SID *sid)
 107 {
 108         struct winbindd_domain *domain;
 109         const char *alternative_name = NULL;
 110
 111         /* ignore alt_name if we are not in an AD domain */
 112
 113         if ( (lp_security() == SEC_ADS) && alt_name && *alt_name) {
 114                 alternative_name = alt_name;
 115         }
 116
 117         /* We can't call domain_list() as this function is called from
 118            init_domain_list() and we'll get stuck in a loop. */
 119         for (domain = _domain_list; domain; domain = domain->next) {
 120                 if (strequal(domain_name, domain->name) ||
 121                     strequal(domain_name, domain->alt_name)) {
 122                         return domain;
 123                 }
 124                 if (alternative_name && *alternative_name) {
 125                         if (strequal(alternative_name, domain->name) ||
 126                             strequal(alternative_name, domain->alt_name)) {
 127                                 return domain;
 128                         }
 129                 }
 130                 if (sid) {
 131                         if (is_null_sid(sid)) {
 132
 133                         } else if (sid_equal(sid, &domain->sid)) {
 134                                 return domain;
 135                         }
 136                 }
 137         }
 138
 139         /* Create new domain entry */
 140
 141         if ((domain = SMB_MALLOC_P(struct winbindd_domain)) == NULL)
 142                 return NULL;
 143
 144         /* Fill in fields */
 145
 146         ZERO_STRUCTP(domain);
 147
 148         /* prioritise the short name */
 149         if (strchr_m(domain_name, '.') && alternative_name && *alternative_name) {
 150                 fstrcpy(domain->name, alternative_name);
 151                 fstrcpy(domain->alt_name, domain_name);
 152         } else {
 153                 fstrcpy(domain->name, domain_name);
 154                 if (alternative_name) {
 155                         fstrcpy(domain->alt_name, alternative_name);
 156                 }
 157         }
 158
 159         domain->methods = methods;
 160         domain->backend = NULL;
 161         domain->internal = is_internal_domain(sid);
 162         domain->sequence_number = DOM_SEQUENCE_NONE;
 163         domain->last_seq_check = 0;
 164         domain->initialized = False;
 165         domain->online = is_internal_domain(sid);
 166         if (sid) {
 167                 sid_copy(&domain->sid, sid);
 168         }
 169
 170         /* Link to domain list */
 171         DLIST_ADD(_domain_list, domain);
 172
 173         DEBUG(2,("Added domain %s %s %s\n",
 174                  domain->name, domain->alt_name,
 175                  &domain->sid?sid_string_static(&domain->sid):""));
 176
 177         return domain;
 178 }
 179
 180 /********************************************************************
 181   rescan our domains looking for new trusted domains
 182 ********************************************************************/
 183
 184 struct trustdom_state {
 185         TALLOC_CTX *mem_ctx;
 186         struct winbindd_response *response;
 187 };
 188
 189 static void trustdom_recv(void *private_data, BOOL success);
 190
 191 static void add_trusted_domains( struct winbindd_domain *domain )
 192 {
 193         TALLOC_CTX *mem_ctx;
 194         struct winbindd_request *request;
 195         struct winbindd_response *response;
 196
 197         struct trustdom_state *state;
 198
 199         mem_ctx = talloc_init("add_trusted_domains");
 200         if (mem_ctx == NULL) {
 201                 DEBUG(0, ("talloc_init failed\n"));
 202                 return;
 203         }
 204
 205         request = TALLOC_ZERO_P(mem_ctx, struct winbindd_request);
 206         response = TALLOC_P(mem_ctx, struct winbindd_response);
 207         state = TALLOC_P(mem_ctx, struct trustdom_state);
 208
 209         if ((request == NULL) || (response == NULL) || (state == NULL)) {
 210                 DEBUG(0, ("talloc failed\n"));
 211                 talloc_destroy(mem_ctx);
 212                 return;
 213         }
 214
 215         state->mem_ctx = mem_ctx;
 216         state->response = response;
 217
 218         request->length = sizeof(*request);
 219         request->cmd = WINBINDD_LIST_TRUSTDOM;
 220
 221         async_domain_request(mem_ctx, domain, request, response,
 222                              trustdom_recv, state);
 223 }
 224
 225 static void trustdom_recv(void *private_data, BOOL success)
 226 {
 227         extern struct winbindd_methods cache_methods;
 228         struct trustdom_state *state =
 229                 talloc_get_type_abort(private_data, struct trustdom_state);
 230         struct winbindd_response *response = state->response;
 231         char *p;
 232
 233         if ((!success) || (response->result != WINBINDD_OK)) {
 234                 DEBUG(1, ("Could not receive trustdoms\n"));
 235                 talloc_destroy(state->mem_ctx);
 236                 return;
 237         }
 238
 239         p = (char *)response->extra_data.data;
 240
 241         while ((p != NULL) && (*p != '\0')) {
 242                 char *q, *sidstr, *alt_name;
 243                 DOM_SID sid;
 244
 245                 alt_name = strchr(p, '\\');
 246                 if (alt_name == NULL) {
 247                         DEBUG(0, ("Got invalid trustdom response\n"));
 248                         break;
 249                 }
 250
 251                 *alt_name = '\0';
 252                 alt_name += 1;
 253
 254                 sidstr = strchr(alt_name, '\\');
 255                 if (sidstr == NULL) {
 256                         DEBUG(0, ("Got invalid trustdom response\n"));
 257                         break;
 258                 }
 259
 260                 *sidstr = '\0';
 261                 sidstr += 1;
 262
 263                 q = strchr(sidstr, '\n');
 264                 if (q != NULL)
 265                         *q = '\0';
 266
 267                 if (!string_to_sid(&sid, sidstr)) {
 268                         DEBUG(0, ("Got invalid trustdom response\n"));
 269                         break;
 270                 }
 271
 272                 if (find_domain_from_name_noinit(p) == NULL) {
 273                         struct winbindd_domain *domain;
 274                         char *alternate_name = NULL;
 275
 276                         /* use the real alt_name if we have one, else pass in NULL */
 277
 278                         if ( !strequal( alt_name, "(null)" ) )
 279                                 alternate_name = alt_name;
 280
 281                         domain = add_trusted_domain(p, alternate_name,
 282                                                     &cache_methods,
 283                                                     &sid);
 284                         setup_domain_child(domain, &domain->child, NULL);
 285                 }
 286                 p=q;
 287                 if (p != NULL)
 288                         p += 1;
 289         }
 290
 291         SAFE_FREE(response->extra_data.data);
 292         talloc_destroy(state->mem_ctx);
 293 }
 294
 295 /********************************************************************
 296  Periodically we need to refresh the trusted domain cache for smbd
 297 ********************************************************************/
 298
 299 void rescan_trusted_domains( void )
 300 {
 301         time_t now = time(NULL);
 302
 303         /* see if the time has come... */
 304
 305         if ((now >= last_trustdom_scan) &&
 306             ((now-last_trustdom_scan) < WINBINDD_RESCAN_FREQ) )
 307                 return;
 308
 309         /* this will only add new domains we didn't already know about */
 310
 311         add_trusted_domains( find_our_domain() );
 312
 313         last_trustdom_scan = now;
 314
 315         return;
 316 }
 317
 318 struct init_child_state {
 319         TALLOC_CTX *mem_ctx;
 320         struct winbindd_domain *domain;
 321         struct winbindd_request *request;
 322         struct winbindd_response *response;
 323         void (*continuation)(void *private_data, BOOL success);
 324         void *private_data;
 325 };
 326
 327 static void init_child_recv(void *private_data, BOOL success);
 328 static void init_child_getdc_recv(void *private_data, BOOL success);
 329
 330 enum winbindd_result init_child_connection(struct winbindd_domain *domain,
 331                                            void (*continuation)(void *private_data,
 332                                                                 BOOL success),
 333                                            void *private_data)
 334 {
 335         TALLOC_CTX *mem_ctx;
 336         struct winbindd_request *request;
 337         struct winbindd_response *response;
 338         struct init_child_state *state;
 339         struct winbindd_domain *request_domain;
 340
 341         mem_ctx = talloc_init("init_child_connection");
 342         if (mem_ctx == NULL) {
 343                 DEBUG(0, ("talloc_init failed\n"));
 344                 return WINBINDD_ERROR;
 345         }
 346
 347         request = TALLOC_ZERO_P(mem_ctx, struct winbindd_request);
 348         response = TALLOC_P(mem_ctx, struct winbindd_response);
 349         state = TALLOC_P(mem_ctx, struct init_child_state);
 350
 351         if ((request == NULL) || (response == NULL) || (state == NULL)) {
 352                 DEBUG(0, ("talloc failed\n"));
 353                 TALLOC_FREE(mem_ctx);
 354                 continuation(private_data, False);
 355                 return WINBINDD_ERROR;
 356         }
 357
 358         request->length = sizeof(*request);
 359
 360         state->mem_ctx = mem_ctx;
 361         state->domain = domain;
 362         state->request = request;
 363         state->response = response;
 364         state->continuation = continuation;
 365         state->private_data = private_data;
 366
 367         if (IS_DC || domain->primary) {
 368                 /* The primary domain has to find the DC name itself */
 369                 request->cmd = WINBINDD_INIT_CONNECTION;
 370                 fstrcpy(request->domain_name, domain->name);
 371                 request->data.init_conn.is_primary = True;
 372                 fstrcpy(request->data.init_conn.dcname, "");
 373                 async_request(mem_ctx, &domain->child, request, response,
 374                               init_child_recv, state);
 375                 return WINBINDD_PENDING;
 376         }
 377
 378         /* This is *not* the primary domain, let's ask our DC about a DC
 379          * name */
 380
 381         request->cmd = WINBINDD_GETDCNAME;
 382         fstrcpy(request->domain_name, domain->name);
 383
 384         /* save online flag */
 385         request_domain = find_our_domain();
 386         request_domain->online = domain->online;
 387
 388         async_domain_request(mem_ctx, request_domain, request, response,
 389                              init_child_getdc_recv, state);
 390         return WINBINDD_PENDING;
 391 }
 392
 393 static void init_child_getdc_recv(void *private_data, BOOL success)
 394 {
 395         struct init_child_state *state =
 396                 talloc_get_type_abort(private_data, struct init_child_state);
 397         const char *dcname = "";
 398
 399         DEBUG(10, ("Received getdcname response\n"));
 400
 401         if (success && (state->response->result == WINBINDD_OK)) {
 402                 dcname = state->response->data.dc_name;
 403         }
 404
 405         state->request->cmd = WINBINDD_INIT_CONNECTION;
 406         fstrcpy(state->request->domain_name, state->domain->name);
 407         state->request->data.init_conn.is_primary = False;
 408         fstrcpy(state->request->data.init_conn.dcname, dcname);
 409
 410         async_request(state->mem_ctx, &state->domain->child,
 411                       state->request, state->response,
 412                       init_child_recv, state);
 413 }
 414
 415 static void init_child_recv(void *private_data, BOOL success)
 416 {
 417         struct init_child_state *state =
 418                 talloc_get_type_abort(private_data, struct init_child_state);
 419
 420         DEBUG(5, ("Received child initialization response for domain %s\n",
 421                   state->domain->name));
 422
 423         if ((!success) || (state->response->result != WINBINDD_OK)) {
 424                 DEBUG(3, ("Could not init child\n"));
 425                 state->continuation(state->private_data, False);
 426                 talloc_destroy(state->mem_ctx);
 427                 return;
 428         }
 429
 430         fstrcpy(state->domain->name,
 431                 state->response->data.domain_info.name);
 432         fstrcpy(state->domain->alt_name,
 433                 state->response->data.domain_info.alt_name);
 434         string_to_sid(&state->domain->sid,
 435                       state->response->data.domain_info.sid);
 436         state->domain->native_mode =
 437                 state->response->data.domain_info.native_mode;
 438         state->domain->active_directory =
 439                 state->response->data.domain_info.active_directory;
 440         state->domain->sequence_number =
 441                 state->response->data.domain_info.sequence_number;
 442
 443         state->domain->initialized = 1;
 444
 445         if (state->continuation != NULL)
 446                 state->continuation(state->private_data, True);
 447         talloc_destroy(state->mem_ctx);
 448 }
 449
 450 enum winbindd_result winbindd_dual_init_connection(struct winbindd_domain *domain,
 451                                                    struct winbindd_cli_state *state)
 452 {
 453         struct in_addr ipaddr;
 454
 455         /* Ensure null termination */
 456         state->request.domain_name
 457                 [sizeof(state->request.domain_name)-1]='\0';
 458         state->request.data.init_conn.dcname
 459                 [sizeof(state->request.data.init_conn.dcname)-1]='\0';
 460
 461         if (strlen(state->request.data.init_conn.dcname) > 0) {
 462                 fstrcpy(domain->dcname, state->request.data.init_conn.dcname);
 463         }
 464
 465         if (strlen(domain->dcname) > 0) {
 466                 if (!resolve_name(domain->dcname, &ipaddr, 0x20)) {
 467                         DEBUG(2, ("Could not resolve DC name %s for domain %s\n",
 468                                   domain->dcname, domain->name));
 469                         return WINBINDD_ERROR;
 470                 }
 471
 472                 domain->dcaddr.sin_family = PF_INET;
 473                 putip((char *)&(domain->dcaddr.sin_addr), (char *)&ipaddr);
 474                 domain->dcaddr.sin_port = 0;
 475         }
 476
 477         set_dc_type_and_flags(domain);
 478
 479         if (!domain->initialized) {
 480                 DEBUG(1, ("Could not initialize domain %s\n",
 481                           state->request.domain_name));
 482                 return WINBINDD_ERROR;
 483         }
 484
 485         fstrcpy(state->response.data.domain_info.name, domain->name);
 486         fstrcpy(state->response.data.domain_info.alt_name, domain->alt_name);
 487         fstrcpy(state->response.data.domain_info.sid,
 488                 sid_string_static(&domain->sid));
 489
 490         state->response.data.domain_info.native_mode
 491                 = domain->native_mode;
 492         state->response.data.domain_info.active_directory
 493                 = domain->active_directory;
 494         state->response.data.domain_info.primary
 495                 = domain->primary;
 496         state->response.data.domain_info.sequence_number =
 497                 domain->sequence_number;
 498
 499         return WINBINDD_OK;
 500 }
 501
 502 /* Look up global info for the winbind daemon */
 503 BOOL init_domain_list(void)
 504 {
 505         extern struct winbindd_methods cache_methods;
 506         extern struct winbindd_methods passdb_methods;
 507         struct winbindd_domain *domain;
 508         int role = lp_server_role();
 509
 510         /* Free existing list */
 511         free_domain_list();
 512
 513         /* Add ourselves as the first entry. */
 514
 515         if ( role == ROLE_DOMAIN_MEMBER ) {
 516                 DOM_SID our_sid;
 517
 518                 if (!secrets_fetch_domain_sid(lp_workgroup(), &our_sid)) {
 519                         DEBUG(0, ("Could not fetch our SID - did we join?\n"));
 520                         return False;
 521                 }
 522
 523                 domain = add_trusted_domain( lp_workgroup(), lp_realm(),
 524                                              &cache_methods, &our_sid);
 525                 domain->primary = True;
 526                 setup_domain_child(domain, &domain->child, NULL);
 527         }
 528
 529         /* Local SAM */
 530
 531         domain = add_trusted_domain(get_global_sam_name(), NULL,
 532                                     &passdb_methods, get_global_sam_sid());
 533         if ( role != ROLE_DOMAIN_MEMBER ) {
 534                 domain->primary = True;
 535         }
 536         setup_domain_child(domain, &domain->child, NULL);
 537
 538         /* BUILTIN domain */
 539
 540         domain = add_trusted_domain("BUILTIN", NULL, &passdb_methods,
 541                                     &global_sid_Builtin);
 542         setup_domain_child(domain, &domain->child, NULL);
 543
 544         return True;
 545 }
 546
 547 /**
 548  * Given a domain name, return the struct winbindd domain info for it
 549  *
 550  * @note Do *not* pass lp_workgroup() to this function.  domain_list
 551  *       may modify it's value, and free that pointer.  Instead, our local
 552  *       domain may be found by calling find_our_domain().
 553  *       directly.
 554  *
 555  *
 556  * @return The domain structure for the named domain, if it is working.
 557  */
 558
 559 struct winbindd_domain *find_domain_from_name_noinit(const char *domain_name)
 560 {
 561         struct winbindd_domain *domain;
 562
 563         /* Search through list */
 564
 565         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 566                 if (strequal(domain_name, domain->name) ||
 567                     (domain->alt_name[0] &&
 568                      strequal(domain_name, domain->alt_name))) {
 569                         return domain;
 570                 }
 571         }
 572
 573         /* Not found */
 574
 575         return NULL;
 576 }
 577
 578 struct winbindd_domain *find_domain_from_name(const char *domain_name)
 579 {
 580         struct winbindd_domain *domain;
 581
 582         domain = find_domain_from_name_noinit(domain_name);
 583
 584         if (domain == NULL)
 585                 return NULL;
 586
 587         if (!domain->initialized)
 588                 set_dc_type_and_flags(domain);
 589
 590         return domain;
 591 }
 592
 593 /* Given a domain sid, return the struct winbindd domain info for it */
 594
 595 struct winbindd_domain *find_domain_from_sid_noinit(const DOM_SID *sid)
 596 {
 597         struct winbindd_domain *domain;
 598
 599         /* Search through list */
 600
 601         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 602                 if (sid_compare_domain(sid, &domain->sid) == 0)
 603                         return domain;
 604         }
 605
 606         /* Not found */
 607
 608         return NULL;
 609 }
 610
 611 /* Given a domain sid, return the struct winbindd domain info for it */
 612
 613 struct winbindd_domain *find_domain_from_sid(const DOM_SID *sid)
 614 {
 615         struct winbindd_domain *domain;
 616
 617         domain = find_domain_from_sid_noinit(sid);
 618
 619         if (domain == NULL)
 620                 return NULL;
 621
 622         if (!domain->initialized)
 623                 set_dc_type_and_flags(domain);
 624
 625         return domain;
 626 }
 627
 628 struct winbindd_domain *find_our_domain(void)
 629 {
 630         struct winbindd_domain *domain;
 631
 632         /* Search through list */
 633
 634         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 635                 if (domain->primary)
 636                         return domain;
 637         }
 638
 639         smb_panic("Could not find our domain\n");
 640         return NULL;
 641 }
 642
 643 struct winbindd_domain *find_builtin_domain(void)
 644 {
 645         DOM_SID sid;
 646         struct winbindd_domain *domain;
 647
 648         string_to_sid(&sid, "S-1-5-32");
 649         domain = find_domain_from_sid(&sid);
 650
 651         if (domain == NULL)
 652                 smb_panic("Could not find BUILTIN domain\n");
 653
 654         return domain;
 655 }
 656
 657 /* Find the appropriate domain to lookup a name or SID */
 658
 659 struct winbindd_domain *find_lookup_domain_from_sid(const DOM_SID *sid)
 660 {
 661         /* A DC can't ask the local smbd for remote SIDs, here winbindd is the
 662          * one to contact the external DC's. On member servers the internal
 663          * domains are different: These are part of the local SAM. */
 664
 665         DEBUG(10, ("find_lookup_domain_from_sid(%s)\n",
 666                    sid_string_static(sid)));
 667
 668         if (IS_DC || is_internal_domain(sid) || is_in_internal_domain(sid)) {
 669                 DEBUG(10, ("calling find_domain_from_sid\n"));
 670                 return find_domain_from_sid(sid);
 671         }
 672
 673         /* On a member server a query for SID or name can always go to our
 674          * primary DC. */
 675
 676         DEBUG(10, ("calling find_our_domain\n"));
 677         return find_our_domain();
 678 }
 679
 680 struct winbindd_domain *find_lookup_domain_from_name(const char *domain_name)
 681 {
 682         if (IS_DC || strequal(domain_name, "BUILTIN") ||
 683             strequal(domain_name, get_global_sam_name()))
 684                 return find_domain_from_name_noinit(domain_name);
 685
 686         return find_our_domain();
 687 }
 688
 689 /* Lookup a sid in a domain from a name */
 690
 691 BOOL winbindd_lookup_sid_by_name(TALLOC_CTX *mem_ctx,
 692                                  struct winbindd_domain *domain,
 693                                  const char *domain_name,
 694                                  const char *name, DOM_SID *sid,
 695                                  enum lsa_SidType *type)
 696 {
 697         NTSTATUS result;
 698
 699         /* Lookup name */
 700         result = domain->methods->name_to_sid(domain, mem_ctx, domain_name, name, sid, type);
 701
 702         /* Return rid and type if lookup successful */
 703         if (!NT_STATUS_IS_OK(result)) {
 704                 *type = SID_NAME_UNKNOWN;
 705         }
 706
 707         return NT_STATUS_IS_OK(result);
 708 }
 709
 710 /**
 711  * @brief Lookup a name in a domain from a sid.
 712  *
 713  * @param sid Security ID you want to look up.
 714  * @param name On success, set to the name corresponding to @p sid.
 715  * @param dom_name On success, set to the 'domain name' corresponding to @p sid.
 716  * @param type On success, contains the type of name: alias, group or
 717  * user.
 718  * @retval True if the name exists, in which case @p name and @p type
 719  * are set, otherwise False.
 720  **/
 721 BOOL winbindd_lookup_name_by_sid(TALLOC_CTX *mem_ctx,
 722                                  DOM_SID *sid,
 723                                  fstring dom_name,
 724                                  fstring name,
 725                                  enum lsa_SidType *type)
 726 {
 727         char *names;
 728         char *dom_names;
 729         NTSTATUS result;
 730         BOOL rv = False;
 731         struct winbindd_domain *domain;
 732
 733         domain = find_lookup_domain_from_sid(sid);
 734
 735         if (!domain) {
 736                 DEBUG(1,("Can't find domain from sid\n"));
 737                 return False;
 738         }
 739
 740         /* Lookup name */
 741
 742         result = domain->methods->sid_to_name(domain, mem_ctx, sid, &dom_names, &names, type);
 743
 744         /* Return name and type if successful */
 745
 746         if ((rv = NT_STATUS_IS_OK(result))) {
 747                 fstrcpy(dom_name, dom_names);
 748                 fstrcpy(name, names);
 749         } else {
 750                 *type = SID_NAME_UNKNOWN;
 751                 fstrcpy(name, name_deadbeef);
 752         }
 753
 754         return rv;
 755 }
 756
 757 /* Free state information held for {set,get,end}{pw,gr}ent() functions */
 758
 759 void free_getent_state(struct getent_state *state)
 760 {
 761         struct getent_state *temp;
 762
 763         /* Iterate over state list */
 764
 765         temp = state;
 766
 767         while(temp != NULL) {
 768                 struct getent_state *next;
 769
 770                 /* Free sam entries then list entry */
 771
 772                 SAFE_FREE(state->sam_entries);
 773                 DLIST_REMOVE(state, state);
 774                 next = temp->next;
 775
 776                 SAFE_FREE(temp);
 777                 temp = next;
 778         }
 779 }
 780
 781 /* Parse winbindd related parameters */
 782
 783 BOOL winbindd_param_init(void)
 784 {
 785         /* Parse winbind uid and winbind_gid parameters */
 786
 787         if (!lp_idmap_uid(&server_state.uid_low, &server_state.uid_high)) {
 788                 DEBUG(0, ("winbindd: idmap uid range missing or invalid\n"));
 789                 DEBUG(0, ("winbindd: cannot continue, exiting.\n"));
 790                 return False;
 791         }
 792
 793         if (!lp_idmap_gid(&server_state.gid_low, &server_state.gid_high)) {
 794                 DEBUG(0, ("winbindd: idmap gid range missing or invalid\n"));
 795                 DEBUG(0, ("winbindd: cannot continue, exiting.\n"));
 796                 return False;
 797         }
 798
 799         return True;
 800 }
 801
 802 BOOL is_in_uid_range(uid_t uid)
 803 {
 804         return ((uid >= server_state.uid_low) &&
 805                 (uid <= server_state.uid_high));
 806 }
 807
 808 BOOL is_in_gid_range(gid_t gid)
 809 {
 810         return ((gid >= server_state.gid_low) &&
 811                 (gid <= server_state.gid_high));
 812 }
 813
 814 /* Is this a domain which we may assume no DOMAIN\ prefix? */
 815
 816 static BOOL assume_domain(const char *domain)
 817 {
 818         /* never assume the domain on a standalone server */
 819
 820         if ( lp_server_role() == ROLE_STANDALONE )
 821                 return False;
 822
 823         /* domain member servers may possibly assume for the domain name */
 824
 825         if ( lp_server_role() == ROLE_DOMAIN_MEMBER ) {
 826                 if ( !strequal(lp_workgroup(), domain) )
 827                         return False;
 828
 829                 if ( lp_winbind_use_default_domain() || lp_winbind_trusted_domains_only() )
 830                         return True;
 831         }
 832
 833         /* only left with a domain controller */
 834
 835         if ( strequal(get_global_sam_name(), domain) )  {
 836                 return True;
 837         }
 838
 839         return False;
 840 }
 841
 842 /* Parse a string of the form DOMAIN\user into a domain and a user */
 843
 844 BOOL parse_domain_user(const char *domuser, fstring domain, fstring user)
 845 {
 846         char *p = strchr(domuser,*lp_winbind_separator());
 847
 848         if ( !p ) {
 849                 fstrcpy(user, domuser);
 850
 851                 if ( assume_domain(lp_workgroup())) {
 852                         fstrcpy(domain, lp_workgroup());
 853                 } else {
 854                         return False;
 855                 }
 856         } else {
 857                 fstrcpy(user, p+1);
 858                 fstrcpy(domain, domuser);
 859                 domain[PTR_DIFF(p, domuser)] = 0;
 860         }
 861
 862         strupper_m(domain);
 863
 864         return True;
 865 }
 866
 867 BOOL parse_domain_user_talloc(TALLOC_CTX *mem_ctx, const char *domuser,
 868                               char **domain, char **user)
 869 {
 870         fstring fstr_domain, fstr_user;
 871         if (!parse_domain_user(domuser, fstr_domain, fstr_user)) {
 872                 return False;
 873         }
 874         *domain = talloc_strdup(mem_ctx, fstr_domain);
 875         *user = talloc_strdup(mem_ctx, fstr_user);
 876         return ((*domain != NULL) && (*user != NULL));
 877 }
 878
 879 /*
 880     Fill DOMAIN\\USERNAME entry accounting 'winbind use default domain' and
 881     'winbind separator' options.
 882     This means:
 883         - omit DOMAIN when 'winbind use default domain = true' and DOMAIN is
 884         lp_workgroup()
 885
 886     If we are a PDC or BDC, and this is for our domain, do likewise.
 887
 888     Also, if omit DOMAIN if 'winbind trusted domains only = true', as the
 889     username is then unqualified in unix
 890
 891     We always canonicalize as UPPERCASE DOMAIN, lowercase username.
 892 */
 893 void fill_domain_username(fstring name, const char *domain, const char *user, BOOL can_assume)
 894 {
 895         fstring tmp_user;
 896
 897         fstrcpy(tmp_user, user);
 898         strlower_m(tmp_user);
 899
 900         if (can_assume && assume_domain(domain)) {
 901                 strlcpy(name, tmp_user, sizeof(fstring));
 902         } else {
 903                 slprintf(name, sizeof(fstring) - 1, "%s%c%s",
 904                          domain, *lp_winbind_separator(),
 905                          tmp_user);
 906         }
 907 }
 908
 909 /*
 910  * Winbindd socket accessor functions
 911  */
 912
 913 char *get_winbind_priv_pipe_dir(void)
 914 {
 915         return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
 916 }
 917
 918 /* Open the winbindd socket */
 919
 920 static int _winbindd_socket = -1;
 921 static int _winbindd_priv_socket = -1;
 922
 923 int open_winbindd_socket(void)
 924 {
 925         if (_winbindd_socket == -1) {
 926                 _winbindd_socket = create_pipe_sock(
 927                         WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME, 0755);
 928                 DEBUG(10, ("open_winbindd_socket: opened socket fd %d\n",
 929                            _winbindd_socket));
 930         }
 931
 932         return _winbindd_socket;
 933 }
 934
 935 int open_winbindd_priv_socket(void)
 936 {
 937         if (_winbindd_priv_socket == -1) {
 938                 _winbindd_priv_socket = create_pipe_sock(
 939                         get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
 940                 DEBUG(10, ("open_winbindd_priv_socket: opened socket fd %d\n",
 941                            _winbindd_priv_socket));
 942         }
 943
 944         return _winbindd_priv_socket;
 945 }
 946
 947 /* Close the winbindd socket */
 948
 949 void close_winbindd_socket(void)
 950 {
 951         if (_winbindd_socket != -1) {
 952                 DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n",
 953                            _winbindd_socket));
 954                 close(_winbindd_socket);
 955                 _winbindd_socket = -1;
 956         }
 957         if (_winbindd_priv_socket != -1) {
 958                 DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n",
 959                            _winbindd_priv_socket));
 960                 close(_winbindd_priv_socket);
 961                 _winbindd_priv_socket = -1;
 962         }
 963 }
 964
 965 /*
 966  * Client list accessor functions
 967  */
 968
 969 static struct winbindd_cli_state *_client_list;
 970 static int _num_clients;
 971
 972 /* Return list of all connected clients */
 973
 974 struct winbindd_cli_state *winbindd_client_list(void)
 975 {
 976         return _client_list;
 977 }
 978
 979 /* Add a connection to the list */
 980
 981 void winbindd_add_client(struct winbindd_cli_state *cli)
 982 {
 983         DLIST_ADD(_client_list, cli);
 984         _num_clients++;
 985 }
 986
 987 /* Remove a client from the list */
 988
 989 void winbindd_remove_client(struct winbindd_cli_state *cli)
 990 {
 991         DLIST_REMOVE(_client_list, cli);
 992         _num_clients--;
 993 }
 994
 995 /* Close all open clients */
 996
 997 void winbindd_kill_all_clients(void)
 998 {
 999         struct winbindd_cli_state *cl = winbindd_client_list();
1000
1001         DEBUG(10, ("winbindd_kill_all_clients: going postal\n"));
1002
1003         while (cl) {
1004                 struct winbindd_cli_state *next;
1005
1006                 next = cl->next;
1007                 winbindd_remove_client(cl);
1008                 cl = next;
1009         }
1010 }
1011
1012 /* Return number of open clients */
1013
1014 int winbindd_num_clients(void)
1015 {
1016         return _num_clients;
1017 }
1018
1019 /*****************************************************************************
1020  For idmap conversion: convert one record to new format
1021  Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
1022  instead of the SID.
1023 *****************************************************************************/
1024 static int convert_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA data, void *state)
1025 {
1026         struct winbindd_domain *domain;
1027         char *p;
1028         DOM_SID sid;
1029         uint32 rid;
1030         fstring keystr;
1031         fstring dom_name;
1032         TDB_DATA key2;
1033         BOOL *failed = (BOOL *)state;
1034
1035         DEBUG(10,("Converting %s\n", key.dptr));
1036
1037         p = strchr(key.dptr, '/');
1038         if (!p)
1039                 return 0;
1040
1041         *p = 0;
1042         fstrcpy(dom_name, key.dptr);
1043         *p++ = '/';
1044
1045         domain = find_domain_from_name(dom_name);
1046         if (domain == NULL) {
1047                 /* We must delete the old record. */
1048                 DEBUG(0,("Unable to find domain %s\n", dom_name ));
1049                 DEBUG(0,("deleting record %s\n", key.dptr ));
1050
1051                 if (tdb_delete(tdb, key) != 0) {
1052                         DEBUG(0, ("Unable to delete record %s\n", key.dptr));
1053                         *failed = True;
1054                         return -1;
1055                 }
1056
1057                 return 0;
1058         }
1059
1060         rid = atoi(p);
1061
1062         sid_copy(&sid, &domain->sid);
1063         sid_append_rid(&sid, rid);
1064
1065         sid_to_string(keystr, &sid);
1066         key2.dptr = keystr;
1067         key2.dsize = strlen(keystr) + 1;
1068
1069         if (tdb_store(tdb, key2, data, TDB_INSERT) != 0) {
1070                 DEBUG(0,("Unable to add record %s\n", key2.dptr ));
1071                 *failed = True;
1072                 return -1;
1073         }
1074
1075         if (tdb_store(tdb, data, key2, TDB_REPLACE) != 0) {
1076                 DEBUG(0,("Unable to update record %s\n", data.dptr ));
1077                 *failed = True;
1078                 return -1;
1079         }
1080
1081         if (tdb_delete(tdb, key) != 0) {
1082                 DEBUG(0,("Unable to delete record %s\n", key.dptr ));
1083                 *failed = True;
1084                 return -1;
1085         }
1086
1087         return 0;
1088 }
1089
1090 /* These definitions are from sam/idmap_tdb.c. Replicated here just
1091    out of laziness.... :-( */
1092
1093 /* High water mark keys */
1094 #define HWM_GROUP  "GROUP HWM"
1095 #define HWM_USER   "USER HWM"
1096
1097 /*****************************************************************************
1098  Convert the idmap database from an older version.
1099 *****************************************************************************/
1100
1101 static BOOL idmap_convert(const char *idmap_name)
1102 {
1103         int32 vers;
1104         BOOL bigendianheader;
1105         BOOL failed = False;
1106         TDB_CONTEXT *idmap_tdb;
1107
1108         if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
1109                                         TDB_DEFAULT, O_RDWR,
1110                                         0600))) {
1111                 DEBUG(0, ("idmap_convert: Unable to open idmap database\n"));
1112                 return False;
1113         }
1114
1115         bigendianheader = (tdb_get_flags(idmap_tdb) & TDB_BIGENDIAN) ? True : False;
1116
1117         vers = tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION");
1118
1119         if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
1120                 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
1121                 /*
1122                  * high and low records were created on a
1123                  * big endian machine and will need byte-reversing.
1124                  */
1125
1126                 int32 wm;
1127
1128                 wm = tdb_fetch_int32(idmap_tdb, HWM_USER);
1129
1130                 if (wm != -1) {
1131                         wm = IREV(wm);
1132                 }  else {
1133                         wm = server_state.uid_low;
1134                 }
1135
1136                 if (tdb_store_int32(idmap_tdb, HWM_USER, wm) == -1) {
1137                         DEBUG(0, ("idmap_convert: Unable to byteswap user hwm in idmap database\n"));
1138                         tdb_close(idmap_tdb);
1139                         return False;
1140                 }
1141
1142                 wm = tdb_fetch_int32(idmap_tdb, HWM_GROUP);
1143                 if (wm != -1) {
1144                         wm = IREV(wm);
1145                 } else {
1146                         wm = server_state.gid_low;
1147                 }
1148
1149                 if (tdb_store_int32(idmap_tdb, HWM_GROUP, wm) == -1) {
1150                         DEBUG(0, ("idmap_convert: Unable to byteswap group hwm in idmap database\n"));
1151                         tdb_close(idmap_tdb);
1152                         return False;
1153                 }
1154         }
1155
1156         /* the old format stored as DOMAIN/rid - now we store the SID direct */
1157         tdb_traverse(idmap_tdb, convert_fn, &failed);
1158
1159         if (failed) {
1160                 DEBUG(0, ("Problem during conversion\n"));
1161                 tdb_close(idmap_tdb);
1162                 return False;
1163         }
1164
1165         if (tdb_store_int32(idmap_tdb, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
1166                 DEBUG(0, ("idmap_convert: Unable to dtore idmap version in databse\n"));
1167                 tdb_close(idmap_tdb);
1168                 return False;
1169         }
1170
1171         tdb_close(idmap_tdb);
1172         return True;
1173 }
1174
1175 /*****************************************************************************
1176  Convert the idmap database from an older version if necessary
1177 *****************************************************************************/
1178
1179 BOOL winbindd_upgrade_idmap(void)
1180 {
1181         pstring idmap_name;
1182         pstring backup_name;
1183         SMB_STRUCT_STAT stbuf;
1184         TDB_CONTEXT *idmap_tdb;
1185
1186         pstrcpy(idmap_name, lock_path("winbindd_idmap.tdb"));
1187
1188         if (!file_exist(idmap_name, &stbuf)) {
1189                 /* nothing to convert return */
1190                 return True;
1191         }
1192
1193         if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
1194                                         TDB_DEFAULT, O_RDWR,
1195                                         0600))) {
1196                 DEBUG(0, ("idmap_convert: Unable to open idmap database\n"));
1197                 return False;
1198         }
1199
1200         if (tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION") == IDMAP_VERSION) {
1201                 /* nothing to convert return */
1202                 tdb_close(idmap_tdb);
1203                 return True;
1204         }
1205
1206         /* backup_tdb expects the tdb not to be open */
1207         tdb_close(idmap_tdb);
1208
1209         DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
1210
1211         pstrcpy(backup_name, idmap_name);
1212         pstrcat(backup_name, ".bak");
1213
1214         if (backup_tdb(idmap_name, backup_name) != 0) {
1215                 DEBUG(0, ("Could not backup idmap database\n"));
1216                 return False;
1217         }
1218
1219         return idmap_convert(idmap_name);
1220 }
1221
1222 NTSTATUS lookup_usergroups_cached(struct winbindd_domain *domain,
1223                                   TALLOC_CTX *mem_ctx,
1224                                   const DOM_SID *user_sid,
1225                                   uint32 *p_num_groups, DOM_SID **user_sids)
1226 {
1227         NET_USER_INFO_3 *info3 = NULL;
1228         NTSTATUS status = NT_STATUS_NO_MEMORY;
1229         int i;
1230         size_t num_groups = 0;
1231         DOM_SID group_sid, primary_group;
1232
1233         DEBUG(3,(": lookup_usergroups_cached\n"));
1234
1235         *user_sids = NULL;
1236         num_groups = 0;
1237         *p_num_groups = 0;
1238
1239         info3 = netsamlogon_cache_get(mem_ctx, user_sid);
1240
1241         if (info3 == NULL) {
1242                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1243         }
1244
1245         if (info3->num_groups == 0) {
1246                 SAFE_FREE(info3);
1247                 return NT_STATUS_UNSUCCESSFUL;
1248         }
1249
1250         /* always add the primary group to the sid array */
1251         sid_compose(&primary_group, &info3->dom_sid.sid, info3->user_rid);
1252
1253         add_sid_to_array(mem_ctx, &primary_group, user_sids, &num_groups);
1254
1255         for (i=0; i<info3->num_groups; i++) {
1256                 sid_copy(&group_sid, &info3->dom_sid.sid);
1257                 sid_append_rid(&group_sid, info3->gids[i].g_rid);
1258
1259                 add_sid_to_array(mem_ctx, &group_sid, user_sids,
1260                                  &num_groups);
1261         }
1262
1263         SAFE_FREE(info3);
1264         *p_num_groups = num_groups;
1265         status = (user_sids != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1266
1267         DEBUG(3,(": lookup_usergroups_cached succeeded\n"));
1268
1269         return status;
1270 }