source/nsswitch/idmap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    ID Mapping
   4    Copyright (C) Tim Potter 2000
   5    Copyright (C) Jim McDonough <jmcd@us.ibm.com>        2003
   6    Copyright (C) Simo Sorce 2003
   7    Copyright (C) Jeremy Allison 2006
   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_IDMAP
  29
  30 static_decl_idmap;
  31
  32 struct idmap_backend {
  33         const char *name;
  34         struct idmap_methods *methods;
  35         struct idmap_backend *prev, *next;
  36 };
  37
  38 struct idmap_alloc_backend {
  39         const char *name;
  40         struct idmap_alloc_methods *methods;
  41         struct idmap_alloc_backend *prev, *next;
  42 };
  43
  44 struct idmap_cache_ctx;
  45
  46 static TALLOC_CTX *idmap_ctx = NULL;
  47 static struct idmap_cache_ctx *idmap_cache;
  48
  49 static struct idmap_backend *backends = NULL;
  50 static struct idmap_domain **idmap_domains = NULL;
  51 static int num_domains = 0;
  52 static int pdb_dom_num = -1;
  53 static int def_dom_num = -1;
  54
  55 static struct idmap_alloc_backend *alloc_backends = NULL;
  56 static struct idmap_alloc_methods *alloc_methods = NULL;
  57
  58 #define IDMAP_CHECK_RET(ret) do { if ( ! NT_STATUS_IS_OK(ret)) { DEBUG(2, ("ERROR: NTSTATUS = 0x%08x\n", NT_STATUS_V(ret))); goto done; } } while(0)
  59 #define IDMAP_CHECK_ALLOC(mem) do { if (!mem) { DEBUG(0, ("Out of memory!\n")); ret = NT_STATUS_NO_MEMORY; goto done; } } while(0)
  60
  61 static struct idmap_methods *get_methods(struct idmap_backend *be, const char *name)
  62 {
  63         struct idmap_backend *b;
  64
  65         for (b = be; b; b = b->next) {
  66                 if (strequal(b->name, name)) {
  67                         return b->methods;
  68                 }
  69         }
  70
  71         return NULL;
  72 }
  73
  74 static struct idmap_alloc_methods *get_alloc_methods(struct idmap_alloc_backend *be, const char *name)
  75 {
  76         struct idmap_alloc_backend *b;
  77
  78         for (b = be; b; b = b->next) {
  79                 if (strequal(b->name, name)) {
  80                         return b->methods;
  81                 }
  82         }
  83
  84         return NULL;
  85 }
  86
  87 /**********************************************************************
  88  Allow a module to register itself as a method.
  89 **********************************************************************/
  90
  91 NTSTATUS smb_register_idmap(int version, const char *name, struct idmap_methods *methods)
  92 {
  93         struct idmap_methods *test;
  94         struct idmap_backend *entry;
  95
  96         if (!idmap_ctx) {
  97                 return NT_STATUS_INTERNAL_DB_ERROR;
  98         }
  99
 100         if ((version != SMB_IDMAP_INTERFACE_VERSION)) {
 101                 DEBUG(0, ("Failed to register idmap module.\n"
 102                           "The module was compiled against SMB_IDMAP_INTERFACE_VERSION %d,\n"
 103                           "current SMB_IDMAP_INTERFACE_VERSION is %d.\n"
 104                           "Please recompile against the current version of samba!\n",
 105                           version, SMB_IDMAP_INTERFACE_VERSION));
 106                 return NT_STATUS_OBJECT_TYPE_MISMATCH;
 107         }
 108
 109         if (!name || !name[0] || !methods) {
 110                 DEBUG(0,("Called with NULL pointer or empty name!\n"));
 111                 return NT_STATUS_INVALID_PARAMETER;
 112         }
 113
 114         test = get_methods(backends, name);
 115         if (test) {
 116                 DEBUG(0,("Idmap module %s already registered!\n", name));
 117                 return NT_STATUS_OBJECT_NAME_COLLISION;
 118         }
 119
 120         entry = talloc(idmap_ctx, struct idmap_backend);
 121         if ( ! entry) {
 122                 DEBUG(0,("Out of memory!\n"));
 123                 return NT_STATUS_NO_MEMORY;
 124         }
 125         entry->name = talloc_strdup(idmap_ctx, name);
 126         if ( ! entry->name) {
 127                 DEBUG(0,("Out of memory!\n"));
 128                 return NT_STATUS_NO_MEMORY;
 129         }
 130         entry->methods = methods;
 131
 132         DLIST_ADD(backends, entry);
 133         DEBUG(5, ("Successfully added idmap backend '%s'\n", name));
 134         return NT_STATUS_OK;
 135 }
 136
 137 /**********************************************************************
 138  Allow a module to register itself as a method.
 139 **********************************************************************/
 140
 141 NTSTATUS smb_register_idmap_alloc(int version, const char *name, struct idmap_alloc_methods *methods)
 142 {
 143         struct idmap_alloc_methods *test;
 144         struct idmap_alloc_backend *entry;
 145
 146         if (!idmap_ctx) {
 147                 return NT_STATUS_INTERNAL_DB_ERROR;
 148         }
 149
 150         if ((version != SMB_IDMAP_INTERFACE_VERSION)) {
 151                 DEBUG(0, ("Failed to register idmap alloc module.\n"
 152                           "The module was compiled against SMB_IDMAP_INTERFACE_VERSION %d,\n"
 153                           "current SMB_IDMAP_INTERFACE_VERSION is %d.\n"
 154                           "Please recompile against the current version of samba!\n",
 155                           version, SMB_IDMAP_INTERFACE_VERSION));
 156                 return NT_STATUS_OBJECT_TYPE_MISMATCH;
 157         }
 158
 159         if (!name || !name[0] || !methods) {
 160                 DEBUG(0,("Called with NULL pointer or empty name!\n"));
 161                 return NT_STATUS_INVALID_PARAMETER;
 162         }
 163
 164         test = get_alloc_methods(alloc_backends, name);
 165         if (test) {
 166                 DEBUG(0,("idmap_alloc module %s already registered!\n", name));
 167                 return NT_STATUS_OBJECT_NAME_COLLISION;
 168         }
 169
 170         entry = talloc(idmap_ctx, struct idmap_alloc_backend);
 171         if ( ! entry) {
 172                 DEBUG(0,("Out of memory!\n"));
 173                 return NT_STATUS_NO_MEMORY;
 174         }
 175         entry->name = talloc_strdup(idmap_ctx, name);
 176         if ( ! entry->name) {
 177                 DEBUG(0,("Out of memory!\n"));
 178                 return NT_STATUS_NO_MEMORY;
 179         }
 180         entry->methods = methods;
 181
 182         DLIST_ADD(alloc_backends, entry);
 183         DEBUG(5, ("Successfully added idmap alloc backend '%s'\n", name));
 184         return NT_STATUS_OK;
 185 }
 186
 187 static int close_domain_destructor(struct idmap_domain *dom)
 188 {
 189         NTSTATUS ret;
 190
 191         ret = dom->methods->close_fn(dom);
 192         if (!NT_STATUS_IS_OK(ret)) {
 193                 DEBUG(3, ("Failed to close idmap domain [%s]!\n", dom->name));
 194         }
 195
 196         return 0;
 197 }
 198
 199 /**************************************************************************
 200  Shutdown.
 201 **************************************************************************/
 202
 203 NTSTATUS idmap_close(void)
 204 {
 205         /* close the alloc backend first before freeing idmap_ctx */
 206         if (alloc_methods) {
 207                 alloc_methods->close_fn();
 208                 alloc_methods = NULL;
 209         }
 210         alloc_backends = NULL;
 211
 212         /* this talloc_free call will fire the talloc destructors
 213          * that will free all active backends resources */
 214         TALLOC_FREE(idmap_ctx);
 215         idmap_cache = NULL;
 216         idmap_domains = NULL;
 217         backends = NULL;
 218
 219         return NT_STATUS_OK;
 220 }
 221
 222 /**********************************************************************
 223  Initialise idmap cache and a remote backend (if configured).
 224 **********************************************************************/
 225
 226 static const char *idmap_default_domain[] = { "default domain", NULL };
 227
 228 NTSTATUS idmap_init(void)
 229 {
 230         NTSTATUS ret;
 231         struct idmap_domain *dom;
 232         char *compat_backend = NULL;
 233         char *compat_params = NULL;
 234         const char **dom_list = NULL;
 235         char *alloc_backend;
 236         BOOL default_already_defined = False;
 237         BOOL pri_dom_is_in_list = False;
 238         int compat = 0;
 239         int i;
 240
 241         if (idmap_ctx) {
 242                 return NT_STATUS_OK;
 243         }
 244
 245         if ( (idmap_ctx = talloc_named_const(NULL, 0, "idmap_ctx")) == NULL ) {
 246                 return NT_STATUS_NO_MEMORY;
 247         }
 248
 249         if ( (idmap_cache = idmap_cache_init(idmap_ctx)) == NULL ) {
 250                 return NT_STATUS_UNSUCCESSFUL;
 251         }
 252
 253         static_init_idmap;
 254
 255         dom_list = lp_idmap_domains();
 256
 257         if ( dom_list && lp_idmap_backend() ) {
 258                 DEBUG(0, ("WARNING: idmap backend and idmap domains are "
 259                           "mutually excusive!\n"));
 260                 DEBUGADD(0,("idmap backend option will be IGNORED!\n"));
 261         } else if ( lp_idmap_backend() ) {
 262                 const char **compat_list = lp_idmap_backend();
 263                 char *p = NULL;
 264                 const char *q = NULL;
 265
 266                 DEBUG(0, ("WARNING: idmap backend is deprecated!\n"));
 267                 compat = 1;
 268
 269                 if ( (compat_backend = talloc_strdup( idmap_ctx, *compat_list )) == NULL ) {
 270                         ret = NT_STATUS_NO_MEMORY;
 271                         goto done;
 272                 }
 273
 274                 /* strip any leading idmap_ prefix of */
 275                 if (strncmp(*compat_list, "idmap_", 6) == 0 ) {
 276                         q = *compat_list += 6;
 277                         DEBUG(0, ("WARNING: idmap backend uses obsolete and "
 278                                   "deprecated 'idmap_' prefix.\n"
 279                                   "Please replace 'idmap_%s' by '%s' in %s\n",
 280                                   q, q, dyn_CONFIGFILE));
 281                         compat_backend = talloc_strdup( idmap_ctx, q);
 282                 } else {
 283                         compat_backend = talloc_strdup( idmap_ctx, *compat_list);
 284                 }
 285
 286                 /* separate the backend and module arguements */
 287                 if ((p = strchr(compat_backend, ':')) != NULL) {
 288                         *p = '\0';
 289                         compat_params = p + 1;
 290                 }
 291         }
 292
 293         if ( ! dom_list) {
 294                 dom_list = idmap_default_domain;
 295         }
 296
 297         /***************************
 298          * initialize idmap domains
 299          */
 300         DEBUG(1, ("Initializing idmap domains\n"));
 301
 302         for (i = 0; dom_list[i]; i++) {
 303                 const char *parm_backend;
 304                 char *config_option;
 305
 306                 if (strequal(dom_list[i], lp_workgroup())) {
 307                         pri_dom_is_in_list = True;
 308                 }
 309                 /* init domain */
 310
 311                 dom = talloc_zero(idmap_ctx, struct idmap_domain);
 312                 IDMAP_CHECK_ALLOC(dom);
 313
 314                 dom->name = talloc_strdup(dom, dom_list[i]);
 315                 IDMAP_CHECK_ALLOC(dom->name);
 316
 317                 config_option = talloc_asprintf(dom, "idmap config %s", dom->name);
 318                 IDMAP_CHECK_ALLOC(config_option);
 319
 320                 /* default or specific ? */
 321
 322                 dom->default_domain = lp_parm_bool(-1, config_option, "default", False);
 323
 324                 if (dom->default_domain ||
 325                     strequal(dom_list[i], idmap_default_domain[0])) {
 326
 327                         /* make sure this is set even when we match idmap_default_domain[0] */
 328                         dom->default_domain = True;
 329
 330                         if (default_already_defined) {
 331                                 DEBUG(1, ("ERROR: Multiple domains defined as default!\n"));
 332                                 ret = NT_STATUS_INVALID_PARAMETER;
 333                                 goto done;
 334                         }
 335
 336                         default_already_defined = True;
 337
 338                 }
 339
 340                 dom->readonly = lp_parm_bool(-1, config_option, "readonly", False);
 341
 342                 /* find associated backend (default: tdb) */
 343                 if (compat) {
 344                         parm_backend = talloc_strdup(idmap_ctx, compat_backend);
 345                 } else {
 346                         parm_backend = talloc_strdup(idmap_ctx,
 347                                                      lp_parm_const_string(-1, config_option, "backend", "tdb"));
 348                 }
 349                 IDMAP_CHECK_ALLOC(parm_backend);
 350
 351                 /* get the backend methods for this domain */
 352                 dom->methods = get_methods(backends, parm_backend);
 353
 354                 if ( ! dom->methods) {
 355                         ret = smb_probe_module("idmap", parm_backend);
 356                         if (NT_STATUS_IS_OK(ret)) {
 357                                 dom->methods = get_methods(backends, parm_backend);
 358                         }
 359                 }
 360                 if ( ! dom->methods) {
 361                         DEBUG(0, ("ERROR: Could not get methods for backend %s\n", parm_backend));
 362                         ret = NT_STATUS_UNSUCCESSFUL;
 363                         goto done;
 364                 }
 365
 366                 /* check the set_mapping function exists otherwise mark the module as readonly */
 367                 if ( ! dom->methods->set_mapping) {
 368                         dom->readonly = True;
 369                 }
 370
 371                 /* now that we have methods, set the destructor for this domain */
 372                 talloc_set_destructor(dom, close_domain_destructor);
 373
 374                 /* Finally instance a backend copy for this domain */
 375                 ret = dom->methods->init(dom, compat_params);
 376                 if ( ! NT_STATUS_IS_OK(ret)) {
 377                         DEBUG(0, ("ERROR: Initialization failed for backend %s (domain %s)\n",
 378                                                 parm_backend, dom->name));
 379                         ret = NT_STATUS_UNSUCCESSFUL;
 380                         goto done;
 381                 }
 382                 idmap_domains = talloc_realloc(idmap_ctx, idmap_domains, struct idmap_domain *, i+1);
 383                 if ( ! idmap_domains) {
 384                         DEBUG(0, ("Out of memory!\n"));
 385                         ret = NT_STATUS_NO_MEMORY;
 386                         goto done;
 387                 }
 388                 idmap_domains[i] = dom;
 389
 390                 if (dom->default_domain) { /* save default domain position for future uses */
 391                         def_dom_num = i;
 392                 }
 393
 394                 DEBUG(10, ("Domain %s - Backend %s - %sdefault - %sreadonly\n",
 395                                 dom->name, parm_backend,
 396                                 dom->default_domain?"":"not ", dom->readonly?"":"not "));
 397
 398                 talloc_free(config_option);
 399         }
 400
 401         /* save the number of domains we have */
 402         num_domains = i;
 403
 404         /* automatically add idmap_nss backend if needed */
 405         if ((lp_server_role() == ROLE_DOMAIN_MEMBER) &&
 406             ( ! pri_dom_is_in_list) &&
 407             lp_winbind_trusted_domains_only()) {
 408
 409                 dom = talloc_zero(idmap_ctx, struct idmap_domain);
 410                 IDMAP_CHECK_ALLOC(dom);
 411
 412                 dom->name = talloc_strdup(dom, lp_workgroup());
 413                 IDMAP_CHECK_ALLOC(dom->name);
 414
 415                 dom->default_domain = False;
 416                 dom->readonly = True;
 417
 418                 /* get the backend methods for passdb */
 419                 dom->methods = get_methods(backends, "nss");
 420
 421                 /* (the nss module is always statically linked) */
 422                 if ( ! dom->methods) {
 423                         DEBUG(0, ("ERROR: Could not get methods for idmap_nss ?!\n"));
 424                         ret = NT_STATUS_UNSUCCESSFUL;
 425                         goto done;
 426                 }
 427
 428                 /* now that we have methods, set the destructor for this domain */
 429                 talloc_set_destructor(dom, close_domain_destructor);
 430
 431                 /* Finally instance a backend copy for this domain */
 432                 ret = dom->methods->init(dom, compat_params);
 433                 if ( ! NT_STATUS_IS_OK(ret)) {
 434                         DEBUG(0, ("ERROR: Initialization failed for idmap_nss ?!\n"));
 435                         ret = NT_STATUS_UNSUCCESSFUL;
 436                         goto done;
 437                 }
 438
 439                 idmap_domains = talloc_realloc(idmap_ctx, idmap_domains, struct idmap_domain *, num_domains+1);
 440                 if ( ! idmap_domains) {
 441                         DEBUG(0, ("Out of memory!\n"));
 442                         ret = NT_STATUS_NO_MEMORY;
 443                         goto done;
 444                 }
 445                 idmap_domains[num_domains] = dom;
 446
 447                 DEBUG(10, ("Domain %s - Backend nss - not default - readonly\n", dom->name ));
 448
 449                 num_domains++;
 450         }
 451
 452         /**** automatically add idmap_passdb backend ****/
 453         dom = talloc_zero(idmap_ctx, struct idmap_domain);
 454         IDMAP_CHECK_ALLOC(dom);
 455
 456         dom->name = talloc_strdup(dom, get_global_sam_name());
 457         IDMAP_CHECK_ALLOC(dom->name);
 458
 459         dom->default_domain = False;
 460         dom->readonly = True;
 461
 462         /* get the backend methods for passdb */
 463         dom->methods = get_methods(backends, "passdb");
 464
 465         /* (the passdb module is always statically linked) */
 466         if ( ! dom->methods) {
 467                 DEBUG(0, ("ERROR: Could not get methods for idmap_passdb ?!\n"));
 468                 ret = NT_STATUS_UNSUCCESSFUL;
 469                 goto done;
 470         }
 471
 472         /* now that we have methods, set the destructor for this domain */
 473         talloc_set_destructor(dom, close_domain_destructor);
 474
 475         /* Finally instance a backend copy for this domain */
 476         ret = dom->methods->init(dom, compat_params);
 477         if ( ! NT_STATUS_IS_OK(ret)) {
 478                 DEBUG(0, ("ERROR: Initialization failed for idmap_passdb ?!\n"));
 479                 ret = NT_STATUS_UNSUCCESSFUL;
 480                 goto done;
 481         }
 482
 483         idmap_domains = talloc_realloc(idmap_ctx, idmap_domains, struct idmap_domain *, num_domains+1);
 484         if ( ! idmap_domains) {
 485                 DEBUG(0, ("Out of memory!\n"));
 486                 ret = NT_STATUS_NO_MEMORY;
 487                 goto done;
 488         }
 489         idmap_domains[num_domains] = dom;
 490
 491         /* needed to handle special BUILTIN and wellknown SIDs cases */
 492         pdb_dom_num = num_domains;
 493
 494         DEBUG(10, ("Domain %s - Backend passdb - not default - readonly\n", dom->name));
 495
 496         num_domains++;
 497         /**** finished adding idmap_passdb backend ****/
 498
 499         /* sort domains so that the default is the last one */
 500         if (def_dom_num != num_domains-1) { /* default is not last, move it */
 501                 struct idmap_domain *tmp;
 502
 503                 if (pdb_dom_num > def_dom_num) {
 504                         pdb_dom_num --;
 505
 506                 } else if (pdb_dom_num == def_dom_num) { /* ?? */
 507                         pdb_dom_num = num_domains - 1;
 508                 }
 509
 510                 tmp = idmap_domains[def_dom_num];
 511
 512                 for (i = def_dom_num; i < num_domains-1; i++) {
 513                         idmap_domains[i] = idmap_domains[i+1];
 514                 }
 515                 idmap_domains[i] = tmp;
 516                 def_dom_num = i;
 517         }
 518
 519
 520         /***************************
 521          * initialize alloc module
 522          */
 523         DEBUG(1, ("Initializing idmap alloc module\n"));
 524
 525         if (compat) {
 526                 alloc_backend = talloc_strdup(idmap_ctx, compat_backend);
 527         } else {
 528                 char *ab = lp_idmap_alloc_backend();
 529
 530                 if (ab && (ab[0] != '\0')) {
 531                         alloc_backend = talloc_strdup(idmap_ctx, lp_idmap_alloc_backend());
 532                 } else {
 533                         alloc_backend = talloc_strdup(idmap_ctx, "tdb");
 534                 }
 535         }
 536         IDMAP_CHECK_ALLOC(alloc_backend);
 537
 538         alloc_methods = get_alloc_methods(alloc_backends, alloc_backend);
 539         if ( ! alloc_methods) {
 540                 ret = smb_probe_module("idmap", alloc_backend);
 541                 if (NT_STATUS_IS_OK(ret)) {
 542                         alloc_methods = get_alloc_methods(alloc_backends, alloc_backend);
 543                 }
 544         }
 545         if ( ! alloc_methods) {
 546                 DEBUG(0, ("ERROR: Could not get methods for alloc backend %s\n", alloc_backend));
 547                 ret = NT_STATUS_UNSUCCESSFUL;
 548                 goto done;
 549         }
 550
 551         ret = alloc_methods->init(compat_params);
 552         if ( ! NT_STATUS_IS_OK(ret)) {
 553                 DEBUG(0, ("ERROR: Initialization failed for alloc backend %s\n", alloc_backend));
 554                 ret = NT_STATUS_UNSUCCESSFUL;
 555                 goto done;
 556         }
 557
 558         /* cleanpu temporary strings */
 559         TALLOC_FREE( compat_backend );
 560
 561         return NT_STATUS_OK;
 562
 563 done:
 564         DEBUG(0, ("Aborting IDMAP Initialization ...\n"));
 565         idmap_close();
 566         return ret;
 567 }
 568
 569 /**************************************************************************
 570  idmap allocator interface functions
 571 **************************************************************************/
 572
 573 NTSTATUS idmap_allocate_uid(struct unixid *id)
 574 {
 575         NTSTATUS ret;
 576
 577         if (! NT_STATUS_IS_OK(ret = idmap_init())) {
 578                 return ret;
 579         }
 580
 581         id->type = ID_TYPE_UID;
 582         return alloc_methods->allocate_id(id);
 583 }
 584
 585 NTSTATUS idmap_allocate_gid(struct unixid *id)
 586 {
 587         NTSTATUS ret;
 588
 589         if (! NT_STATUS_IS_OK(ret = idmap_init())) {
 590                 return ret;
 591         }
 592
 593         id->type = ID_TYPE_GID;
 594         return alloc_methods->allocate_id(id);
 595 }
 596
 597 NTSTATUS idmap_set_uid_hwm(struct unixid *id)
 598 {
 599         NTSTATUS ret;
 600
 601         if (! NT_STATUS_IS_OK(ret = idmap_init())) {
 602                 return ret;
 603         }
 604
 605         id->type = ID_TYPE_UID;
 606         return alloc_methods->set_id_hwm(id);
 607 }
 608
 609 NTSTATUS idmap_set_gid_hwm(struct unixid *id)
 610 {
 611         NTSTATUS ret;
 612
 613         if (! NT_STATUS_IS_OK(ret = idmap_init())) {
 614                 return ret;
 615         }
 616
 617         id->type = ID_TYPE_GID;
 618         return alloc_methods->set_id_hwm(id);
 619 }
 620
 621 /******************************************************************************
 622  Lookup an idmap_domain give a full user or group SID
 623  ******************************************************************************/
 624
 625 static struct idmap_domain* find_idmap_domain_from_sid( DOM_SID *account_sid )
 626 {
 627         DOM_SID domain_sid;
 628         uint32 rid;
 629         struct winbindd_domain *domain = NULL;
 630         int i;
 631
 632         /* 1. Handle BUILTIN or Special SIDs and prevent them from
 633            falling into the default domain space (if we have a
 634            configured passdb backend. */
 635
 636         if ( (pdb_dom_num != -1) &&
 637              (sid_check_is_in_builtin(account_sid) ||
 638               sid_check_is_in_wellknown_domain(account_sid)) )
 639         {
 640                 return idmap_domains[pdb_dom_num];
 641         }
 642
 643         /* 2. Lookup the winbindd_domain from the account_sid */
 644
 645         sid_copy( &domain_sid, account_sid );
 646         sid_split_rid( &domain_sid, &rid );
 647         domain = find_domain_from_sid_noinit( &domain_sid );
 648
 649         for (i = 0; domain && i < num_domains; i++) {
 650                 if ( strequal( idmap_domains[i]->name, domain->name ) ) {
 651                         return idmap_domains[i];
 652                 }
 653         }
 654
 655         /* 3. Fall back to the default domain */
 656
 657         if ( def_dom_num != -1 ) {
 658                 return idmap_domains[def_dom_num];
 659         }
 660
 661         return NULL;
 662 }
 663
 664 /******************************************************************************
 665  Lookup an index given an idmap_domain pointer
 666  ******************************************************************************/
 667
 668 static uint32 find_idmap_domain_index( struct idmap_domain *id_domain)
 669 {
 670         int i;
 671
 672         for (i = 0; i < num_domains; i++) {
 673                 if ( idmap_domains[i] == id_domain )
 674                         return i;
 675         }
 676
 677         return -1;
 678 }
 679
 680
 681 /*********************************************************
 682  Check if creating a mapping is permitted for the domain
 683 *********************************************************/
 684
 685 static NTSTATUS idmap_can_map(const struct id_map *map, struct idmap_domain **ret_dom)
 686 {
 687         struct idmap_domain *dom;
 688
 689         /* Check we do not create mappings for our own local domain, or BUILTIN or special SIDs */
 690         if ((sid_compare_domain(map->sid, get_global_sam_sid()) == 0) ||
 691             sid_check_is_in_builtin(map->sid) ||
 692             sid_check_is_in_wellknown_domain(map->sid)) {
 693                 DEBUG(10, ("We are not supposed to create mappings for our own domains (local, builtin, specials)\n"));
 694                 return NT_STATUS_UNSUCCESSFUL;
 695         }
 696
 697         /* Special check for trusted domain only = Yes */
 698         if (lp_winbind_trusted_domains_only()) {
 699                 struct winbindd_domain *wdom = find_our_domain();
 700                 if (wdom && (sid_compare_domain(map->sid, &wdom->sid) == 0)) {
 701                         DEBUG(10, ("We are not supposed to create mappings for our primary domain when <trusted domain only> is True\n"));
 702                         DEBUGADD(10, ("Leave [%s] unmapped\n", sid_string_static(map->sid)));
 703                         return NT_STATUS_UNSUCCESSFUL;
 704                 }
 705         }
 706
 707         if ( (dom = find_idmap_domain_from_sid( map->sid )) == NULL ) {
 708                 /* huh, couldn't find a suitable domain, let's just leave it unmapped */
 709                 DEBUG(10, ("Could not find idmap backend for SID %s", sid_string_static(map->sid)));
 710                 return NT_STATUS_NO_SUCH_DOMAIN;
 711         }
 712
 713         if (dom->readonly) {
 714                 /* ouch the domain is read only, let's just leave it unmapped */
 715                 DEBUG(10, ("idmap backend for SID %s is READONLY!\n", sid_string_static(map->sid)));
 716                 return NT_STATUS_UNSUCCESSFUL;
 717         }
 718
 719         *ret_dom = dom;
 720         return NT_STATUS_OK;
 721 }
 722
 723 static NTSTATUS idmap_new_mapping(TALLOC_CTX *ctx, struct id_map *map)
 724 {
 725         NTSTATUS ret;
 726         struct idmap_domain *dom;
 727         const char *domname, *name;
 728         enum lsa_SidType sid_type;
 729         BOOL wbret;
 730
 731         ret = idmap_can_map(map, &dom);
 732         if ( ! NT_STATUS_IS_OK(ret)) {
 733                 return NT_STATUS_NONE_MAPPED;
 734         }
 735
 736         /* by default calls to winbindd are disabled
 737            the following call will not recurse so this is safe */
 738         winbind_on();
 739         wbret = winbind_lookup_sid(ctx, map->sid, &domname, &name, &sid_type);
 740         winbind_off();
 741
 742         /* check if this is a valid SID and then map it */
 743         if (wbret) {
 744                 switch (sid_type) {
 745                 case SID_NAME_USER:
 746                         ret = idmap_allocate_uid(&map->xid);
 747                         if ( ! NT_STATUS_IS_OK(ret)) {
 748                                 /* can't allocate id, let's just leave it unmapped */
 749                                 DEBUG(2, ("uid allocation failed! Can't create mapping\n"));
 750                                 return NT_STATUS_NONE_MAPPED;
 751                         }
 752                         break;
 753                 case SID_NAME_DOM_GRP:
 754                 case SID_NAME_ALIAS:
 755                 case SID_NAME_WKN_GRP:
 756                         ret = idmap_allocate_gid(&map->xid);
 757                         if ( ! NT_STATUS_IS_OK(ret)) {
 758                                 /* can't allocate id, let's just leave it unmapped */
 759                                 DEBUG(2, ("gid allocation failed! Can't create mapping\n"));
 760                                 return NT_STATUS_NONE_MAPPED;
 761                         }
 762                         break;
 763                 default:
 764                         /* invalid sid, let's just leave it unmapped */
 765                         DEBUG(10, ("SID %s is UNKNOWN, skip mapping\n", sid_string_static(map->sid)));
 766                         return NT_STATUS_NONE_MAPPED;
 767                 }
 768
 769                 /* ok, got a new id, let's set a mapping */
 770                 map->status = ID_MAPPED;
 771
 772                 DEBUG(10, ("Setting mapping: %s <-> %s %lu\n",
 773                            sid_string_static(map->sid),
 774                            (map->xid.type == ID_TYPE_UID) ? "UID" : "GID",
 775                            (unsigned long)map->xid.id));
 776                 ret = dom->methods->set_mapping(dom, map);
 777
 778                 if ( ! NT_STATUS_IS_OK(ret)) {
 779                         /* something wrong here :-( */
 780                         DEBUG(2, ("Failed to commit mapping\n!"));
 781
 782                         /* TODO: would it make sense to have an "unalloc_id function?" */
 783
 784                         return NT_STATUS_NONE_MAPPED;
 785                 }
 786         } else {
 787                 DEBUG(2,("Invalid SID, not mapping %s (type %d)\n",
 788                                 sid_string_static(map->sid), sid_type));
 789                 return NT_STATUS_NONE_MAPPED;
 790         }
 791
 792         return NT_STATUS_OK;
 793 }
 794
 795 static NTSTATUS idmap_backends_set_mapping(const struct id_map *map)
 796 {
 797         struct idmap_domain *dom;
 798         NTSTATUS ret;
 799
 800         DEBUG(10, ("Setting mapping %s <-> %s %lu\n",
 801                    sid_string_static(map->sid),
 802                    (map->xid.type == ID_TYPE_UID) ? "UID" : "GID",
 803                    (unsigned long)map->xid.id));
 804
 805         ret = idmap_can_map(map, &dom);
 806         if ( ! NT_STATUS_IS_OK(ret)) {
 807                 return ret;
 808         }
 809
 810         DEBUG(10,("set_mapping for domain %s\n", dom->name ));
 811
 812         return dom->methods->set_mapping(dom, map);
 813 }
 814
 815 static NTSTATUS idmap_backends_unixids_to_sids(struct id_map **ids)
 816 {
 817         struct idmap_domain *dom;
 818         struct id_map **unmapped;
 819         struct id_map **_ids;
 820         TALLOC_CTX *ctx;
 821         NTSTATUS ret;
 822         int i, u, n;
 823
 824         if (!ids || !*ids) {
 825                 DEBUG(1, ("Invalid list of maps\n"));
 826                 return NT_STATUS_INVALID_PARAMETER;
 827         }
 828
 829         ctx = talloc_named_const(NULL, 0, "idmap_backends_unixids_to_sids ctx");
 830         if ( ! ctx) {
 831                 DEBUG(0, ("Out of memory!\n"));
 832                 return NT_STATUS_NO_MEMORY;
 833         }
 834
 835         DEBUG(10, ("Query backends to map ids->sids\n"));
 836
 837         /* start from the default (the last one) and then if there are still
 838          * unmapped entries cycle through the others */
 839
 840         _ids = ids;
 841
 842         /* make sure all maps are marked as in UNKNOWN status */
 843         for (i = 0; _ids[i]; i++) {
 844                 _ids[i]->status = ID_UNKNOWN;
 845         }
 846
 847         unmapped = NULL;
 848         for (n = num_domains-1; n >= 0; n--) { /* cycle backwards */
 849
 850                 dom = idmap_domains[n];
 851
 852                 DEBUG(10, ("Query sids from domain %s\n", dom->name));
 853
 854                 ret = dom->methods->unixids_to_sids(dom, _ids);
 855                 IDMAP_CHECK_RET(ret);
 856
 857                 unmapped = NULL;
 858
 859                 for (i = 0, u = 0; _ids[i]; i++) {
 860                         if (_ids[i]->status == ID_UNKNOWN || _ids[i]->status == ID_UNMAPPED) {
 861                                 unmapped = talloc_realloc(ctx, unmapped, struct id_map *, u + 2);
 862                                 IDMAP_CHECK_ALLOC(unmapped);
 863                                 unmapped[u] = _ids[i];
 864                                 u++;
 865                         }
 866                 }
 867                 if (unmapped) {
 868                         /* terminate the unmapped list */
 869                         unmapped[u] = NULL;
 870                 } else { /* no more entries, get out */
 871                         break;
 872                 }
 873
 874                 _ids = unmapped;
 875
 876         }
 877
 878         if (unmapped) {
 879                 /* there are still unmapped ids, map them to the unix users/groups domains */
 880                 for (i = 0; unmapped[i]; i++) {
 881                         switch (unmapped[i]->xid.type) {
 882                         case ID_TYPE_UID:
 883                                 uid_to_unix_users_sid((uid_t)unmapped[i]->xid.id, unmapped[i]->sid);
 884                                 unmapped[i]->status = ID_MAPPED;
 885                                 break;
 886                         case ID_TYPE_GID:
 887                                 gid_to_unix_groups_sid((gid_t)unmapped[i]->xid.id, unmapped[i]->sid);
 888                                 unmapped[i]->status = ID_MAPPED;
 889                                 break;
 890                         default: /* what?! */
 891                                 unmapped[i]->status = ID_UNKNOWN;
 892                                 break;
 893                         }
 894                 }
 895         }
 896
 897         ret = NT_STATUS_OK;
 898
 899 done:
 900         talloc_free(ctx);
 901         return ret;
 902 }
 903
 904 static NTSTATUS idmap_backends_sids_to_unixids(struct id_map **ids)
 905 {
 906         struct id_map ***dom_ids;
 907         struct idmap_domain *dom;
 908         TALLOC_CTX *ctx;
 909         NTSTATUS ret;
 910         int i, *counters;
 911
 912         if ( (ctx = talloc_named_const(NULL, 0, "be_sids_to_ids")) == NULL ) {
 913                 DEBUG(1, ("failed to allocate talloc context, OOM?\n"));
 914                 return NT_STATUS_NO_MEMORY;
 915         }
 916
 917         DEBUG(10, ("Query backends to map sids->ids\n"));
 918
 919         /* split list per domain */
 920
 921         dom_ids = talloc_zero_array(ctx, struct id_map **, num_domains);
 922         IDMAP_CHECK_ALLOC(dom_ids);
 923         counters = talloc_zero_array(ctx, int, num_domains);
 924
 925         /* partition the requests by domain */
 926
 927         for (i = 0; ids[i]; i++) {
 928                 uint32 idx;
 929
 930                 /* make sure they are unknown to start off */
 931                 ids[i]->status = ID_UNKNOWN;
 932
 933                 if ( (dom = find_idmap_domain_from_sid( ids[i]->sid )) == NULL ) {
 934                         /* no vailable idmap_domain.  Move on */
 935                         continue;
 936                 }
 937
 938                 DEBUG(10,("SID %s is being handled by %s\n",
 939                           sid_string_static(ids[i]->sid),
 940                           dom ? dom->name : "none" ));
 941
 942                 idx = find_idmap_domain_index( dom );
 943                 SMB_ASSERT( idx != -1 );
 944
 945                 dom_ids[idx] = talloc_realloc(ctx, dom_ids[idx],
 946                                               struct id_map *, counters[idx] + 2);
 947                 IDMAP_CHECK_ALLOC(dom_ids[idx]);
 948
 949                 dom_ids[idx][counters[idx]] = ids[i];
 950                 counters[idx]++;
 951                 dom_ids[idx][counters[idx]] = NULL;
 952         }
 953
 954         /* All the ids have been dispatched in the right queues.
 955            Let's cycle through the filled ones */
 956
 957         for (i = 0; i < num_domains; i++) {
 958                 if (dom_ids[i]) {
 959                         dom = idmap_domains[i];
 960                         DEBUG(10, ("Query ids from domain %s\n", dom->name));
 961                         ret = dom->methods->sids_to_unixids(dom, dom_ids[i]);
 962                         IDMAP_CHECK_RET(ret);
 963                 }
 964         }
 965
 966         /* ok all the backends have been contacted at this point */
 967         /* let's see if we have any unmapped SID left and act accordingly */
 968
 969         for (i = 0; ids[i]; i++) {
 970                 if (ids[i]->status == ID_UNKNOWN || ids[i]->status == ID_UNMAPPED) {
 971                         /* ok this is an unmapped one, see if we can map it */
 972                         ret = idmap_new_mapping(ctx, ids[i]);
 973                         if (NT_STATUS_IS_OK(ret)) {
 974                                 /* successfully mapped */
 975                                 ids[i]->status = ID_MAPPED;
 976                         } else if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 977                                 /* could not map it */
 978                                 ids[i]->status = ID_UNMAPPED;
 979                         } else {
 980                                 /* Something very bad happened down there */
 981                                 ids[i]->status = ID_UNKNOWN;
 982                         }
 983                 }
 984         }
 985
 986         ret = NT_STATUS_OK;
 987
 988 done:
 989         talloc_free(ctx);
 990         return ret;
 991 }
 992
 993 /**************************************************************************
 994  idmap interface functions
 995 **************************************************************************/
 996
 997 NTSTATUS idmap_unixids_to_sids(struct id_map **ids)
 998 {
 999         TALLOC_CTX *ctx;
1000         NTSTATUS ret;
1001         struct id_map **bids;
1002         int i, bi;
1003         int bn = 0;
1004
1005         if (! NT_STATUS_IS_OK(ret = idmap_init())) {
1006                 return ret;
1007         }
1008
1009         if (!ids || !*ids) {
1010                 DEBUG(1, ("Invalid list of maps\n"));
1011                 return NT_STATUS_INVALID_PARAMETER;
1012         }
1013
1014         ctx = talloc_named_const(NULL, 0, "idmap_unixids_to_sids ctx");
1015         if ( ! ctx) {
1016                 DEBUG(1, ("failed to allocate talloc context, OOM?\n"));
1017                 return NT_STATUS_NO_MEMORY;
1018         }
1019
1020         /* no ids to be asked to the backends by default */
1021         bids = NULL;
1022         bi = 0;
1023
1024         for (i = 0; ids[i]; i++) {
1025
1026                 if ( ! ids[i]->sid) {
1027                         DEBUG(1, ("invalid null SID in id_map array"));
1028                         talloc_free(ctx);
1029                         return NT_STATUS_INVALID_PARAMETER;
1030                 }
1031
1032                 ret = idmap_cache_map_id(idmap_cache, ids[i]);
1033
1034                 if ( ! NT_STATUS_IS_OK(ret)) {
1035
1036                         if ( ! bids) {
1037                                 /* alloc space for ids to be resolved by backends (realloc ten by ten) */
1038                                 bids = talloc_array(ctx, struct id_map *, 10);
1039                                 if ( ! bids) {
1040                                         DEBUG(1, ("Out of memory!\n"));
1041                                         talloc_free(ctx);
1042                                         return NT_STATUS_NO_MEMORY;
1043                                 }
1044                                 bn = 10;
1045                         }
1046
1047                         /* add this id to the ones to be retrieved from the backends */
1048                         bids[bi] = ids[i];
1049                         bi++;
1050
1051                         /* check if we need to allocate new space on the rids array */
1052                         if (bi == bn) {
1053                                 bn += 10;
1054                                 bids = talloc_realloc(ctx, bids, struct id_map *, bn);
1055                                 if ( ! bids) {
1056                                         DEBUG(1, ("Out of memory!\n"));
1057                                         talloc_free(ctx);
1058                                         return NT_STATUS_NO_MEMORY;
1059                                 }
1060                         }
1061
1062                         /* make sure the last element is NULL */
1063                         bids[bi] = NULL;
1064                 }
1065         }
1066
1067         /* let's see if there is any id mapping to be retieved from the backends */
1068         if (bi) {
1069                 ret = idmap_backends_unixids_to_sids(bids);
1070                 IDMAP_CHECK_RET(ret);
1071
1072                 /* update the cache */
1073                 for (i = 0; i < bi; i++) {
1074                         if (bids[i]->status == ID_MAPPED) {
1075                                 ret = idmap_cache_set(idmap_cache, bids[i]);
1076                         } else if (bids[i]->status == ID_UNKNOWN) {
1077                                 /* return an expired entry in the cache or an unknown */
1078                                 /* this handles a previous NT_STATUS_SYNCHRONIZATION_REQUIRED
1079                                  * for disconnected mode */
1080                                 idmap_cache_map_id(idmap_cache, ids[i]);
1081                         } else { /* unmapped */
1082                                 ret = idmap_cache_set_negative_id(idmap_cache, bids[i]);
1083                         }
1084                         IDMAP_CHECK_RET(ret);
1085                 }
1086         }
1087
1088         ret = NT_STATUS_OK;
1089 done:
1090         talloc_free(ctx);
1091         return ret;
1092 }
1093
1094 NTSTATUS idmap_sids_to_unixids(struct id_map **ids)
1095 {
1096         TALLOC_CTX *ctx;
1097         NTSTATUS ret;
1098         struct id_map **bids;
1099         int i, bi;
1100         int bn = 0;
1101
1102         if (! NT_STATUS_IS_OK(ret = idmap_init())) {
1103                 return ret;
1104         }
1105
1106         if (!ids || !*ids) {
1107                 DEBUG(1, ("Invalid list of maps\n"));
1108                 return NT_STATUS_INVALID_PARAMETER;
1109         }
1110
1111         ctx = talloc_named_const(NULL, 0, "idmap_sids_to_unixids ctx");
1112         if ( ! ctx) {
1113                 DEBUG(1, ("failed to allocate talloc context, OOM?\n"));
1114                 return NT_STATUS_NO_MEMORY;
1115         }
1116
1117         /* no ids to be asked to the backends by default */
1118         bids = NULL;
1119         bi = 0;
1120
1121         for (i = 0; ids[i]; i++) {
1122
1123                 if ( ! ids[i]->sid) {
1124                         DEBUG(1, ("invalid null SID in id_map array\n"));
1125                         talloc_free(ctx);
1126                         return NT_STATUS_INVALID_PARAMETER;
1127                 }
1128
1129                 ret = idmap_cache_map_sid(idmap_cache, ids[i]);
1130
1131                 if ( ! NT_STATUS_IS_OK(ret)) {
1132
1133                         if ( ! bids) {
1134                                 /* alloc space for ids to be resolved by backends (realloc ten by ten) */
1135                                 bids = talloc_array(ctx, struct id_map *, 10);
1136                                 if ( ! bids) {
1137                                         DEBUG(1, ("Out of memory!\n"));
1138                                         talloc_free(ctx);
1139                                         return NT_STATUS_NO_MEMORY;
1140                                 }
1141                                 bn = 10;
1142                         }
1143
1144                         /* add this id to the ones to be retrieved from the backends */
1145                         bids[bi] = ids[i];
1146                         bi++;
1147
1148                         /* check if we need to allocate new space on the ids array */
1149                         if (bi == bn) {
1150                                 bn += 10;
1151                                 bids = talloc_realloc(ctx, bids, struct id_map *, bn);
1152                                 if ( ! bids) {
1153                                         DEBUG(1, ("Out of memory!\n"));
1154                                         talloc_free(ctx);
1155                                         return NT_STATUS_NO_MEMORY;
1156                                 }
1157                         }
1158
1159                         /* make sure the last element is NULL */
1160                         bids[bi] = NULL;
1161                 }
1162         }
1163
1164         /* let's see if there is any id mapping to be retieved from the backends */
1165         if (bids) {
1166                 ret = idmap_backends_sids_to_unixids(bids);
1167                 IDMAP_CHECK_RET(ret);
1168
1169                 /* update the cache */
1170                 for (i = 0; bids[i]; i++) {
1171                         if (bids[i]->status == ID_MAPPED) {
1172                                 ret = idmap_cache_set(idmap_cache, bids[i]);
1173                         } else if (bids[i]->status == ID_UNKNOWN) {
1174                                 /* return an expired entry in the cache or an unknown */
1175                                 /* this handles a previous NT_STATUS_SYNCHRONIZATION_REQUIRED
1176                                  * for disconnected mode */
1177                                 idmap_cache_map_id(idmap_cache, ids[i]);
1178                         } else {
1179                                 ret = idmap_cache_set_negative_sid(idmap_cache, bids[i]);
1180                         }
1181                         IDMAP_CHECK_RET(ret);
1182                 }
1183         }
1184
1185         ret = NT_STATUS_OK;
1186 done:
1187         talloc_free(ctx);
1188         return ret;
1189 }
1190
1191 NTSTATUS idmap_set_mapping(const struct id_map *id)
1192 {
1193         TALLOC_CTX *ctx;
1194         NTSTATUS ret;
1195
1196         if (! NT_STATUS_IS_OK(ret = idmap_init())) {
1197                 return ret;
1198         }
1199
1200         /* sanity checks */
1201         if ((id->sid == NULL) || (id->status != ID_MAPPED)) {
1202                 DEBUG(1, ("NULL SID or unmapped entry\n"));
1203                 return NT_STATUS_INVALID_PARAMETER;
1204         }
1205
1206         /* TODO: check uid/gid range ? */
1207
1208         ctx = talloc_named_const(NULL, 0, "idmap_set_mapping ctx");
1209         if ( ! ctx) {
1210                 DEBUG(1, ("failed to allocate talloc context, OOM?\n"));
1211                 return NT_STATUS_NO_MEMORY;
1212         }
1213
1214         /* set the new mapping */
1215         ret = idmap_backends_set_mapping(id);
1216         IDMAP_CHECK_RET(ret);
1217
1218         /* set the mapping in the cache */
1219         ret = idmap_cache_set(idmap_cache, id);
1220         IDMAP_CHECK_RET(ret);
1221
1222 done:
1223         talloc_free(ctx);
1224         return ret;
1225 }
1226
1227 /**************************************************************************
1228  Dump backend status.
1229 **************************************************************************/
1230
1231 void idmap_dump_maps(char *logfile)
1232 {
1233         NTSTATUS ret;
1234         struct unixid allid;
1235         struct id_map *maps;
1236         int num_maps;
1237         FILE *dump;
1238         int i;
1239
1240         if (! NT_STATUS_IS_OK(ret = idmap_init())) {
1241                 return;
1242         }
1243
1244         dump = fopen(logfile, "w");
1245         if ( ! dump) {
1246                 DEBUG(0, ("Unable to open open stream for file [%s], errno: %d\n", logfile, errno));
1247                 return;
1248         }
1249
1250         allid.type = ID_TYPE_UID;
1251         allid.id = 0;
1252         alloc_methods->get_id_hwm(&allid);
1253         fprintf(dump, "USER HWM %lu\n", (unsigned long)allid.id);
1254
1255         allid.type = ID_TYPE_GID;
1256         allid.id = 0;
1257         alloc_methods->get_id_hwm(&allid);
1258         fprintf(dump, "GROUP HWM %lu\n", (unsigned long)allid.id);
1259
1260         maps = talloc(idmap_ctx, struct id_map);
1261         num_maps = 0;
1262
1263         for (i = 0; i < num_domains; i++) {
1264                 if (idmap_domains[i]->methods->dump_data) {
1265                         idmap_domains[i]->methods->dump_data(idmap_domains[i], &maps, &num_maps);
1266                 }
1267         }
1268
1269         for (i = 0; i < num_maps; i++) {
1270                 switch (maps[i].xid.type) {
1271                 case ID_TYPE_UID:
1272                         fprintf(dump, "UID %lu %s\n",
1273                                 (unsigned long)maps[i].xid.id,
1274                                 sid_string_static(maps[i].sid));
1275                         break;
1276                 case ID_TYPE_GID:
1277                         fprintf(dump, "GID %lu %s\n",
1278                                 (unsigned long)maps[i].xid.id,
1279                                 sid_string_static(maps[i].sid));
1280                         break;
1281                 }
1282         }
1283
1284         fflush(dump);
1285         fclose(dump);
1286 }
1287
1288 char *idmap_fetch_secret(const char *backend, bool alloc,
1289                                const char *domain, const char *identity)
1290 {
1291         char *tmp, *ret;
1292         int r;
1293
1294         if (alloc) {
1295                 r = asprintf(&tmp, "IDMAP_ALLOC_%s", backend);
1296         } else {
1297                 r = asprintf(&tmp, "IDMAP_%s_%s", backend, domain);
1298         }
1299
1300         if (r < 0)
1301                 return NULL;
1302
1303         strupper_m(tmp); /* make sure the key is case insensitive */
1304         ret = secrets_fetch_generic(tmp, identity);
1305
1306         SAFE_FREE( tmp );
1307
1308         return ret;
1309 }