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