source3/winbindd/idmap_ldap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    idmap LDAP backend
   5
   6    Copyright (C) Tim Potter             2000
   7    Copyright (C) Jim McDonough <jmcd@us.ibm.com>        2003
   8    Copyright (C) Gerald Carter          2003
   9    Copyright (C) Simo Sorce             2003-2007
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "winbindd.h"
  27
  28 #undef DBGC_CLASS
  29 #define DBGC_CLASS DBGC_IDMAP
  30
  31 #include <lber.h>
  32 #include <ldap.h>
  33
  34 #include "smbldap.h"
  35
  36 static char *idmap_fetch_secret(const char *backend, bool alloc,
  37                                 const char *domain, const char *identity)
  38 {
  39         char *tmp, *ret;
  40         int r;
  41
  42         if (alloc) {
  43                 r = asprintf(&tmp, "IDMAP_ALLOC_%s", backend);
  44         } else {
  45                 r = asprintf(&tmp, "IDMAP_%s_%s", backend, domain);
  46         }
  47
  48         if (r < 0)
  49                 return NULL;
  50
  51         strupper_m(tmp); /* make sure the key is case insensitive */
  52         ret = secrets_fetch_generic(tmp, identity);
  53
  54         SAFE_FREE(tmp);
  55
  56         return ret;
  57 }
  58
  59 struct idmap_ldap_context {
  60         struct smbldap_state *smbldap_state;
  61         char *url;
  62         char *suffix;
  63         char *user_dn;
  64         uint32_t filter_low_id, filter_high_id;         /* Filter range */
  65         bool anon;
  66 };
  67
  68 struct idmap_ldap_alloc_context {
  69         struct smbldap_state *smbldap_state;
  70         char *url;
  71         char *suffix;
  72         char *user_dn;
  73         uid_t low_uid, high_uid;      /* Range of uids */
  74         gid_t low_gid, high_gid;      /* Range of gids */
  75
  76 };
  77
  78 #define CHECK_ALLOC_DONE(mem) do { \
  79         if (!mem) { \
  80                 DEBUG(0, ("Out of memory!\n")); \
  81                 ret = NT_STATUS_NO_MEMORY; \
  82                 goto done; \
  83         } } while (0)
  84
  85 /**********************************************************************
  86  IDMAP ALLOC TDB BACKEND
  87 **********************************************************************/
  88
  89 static struct idmap_ldap_alloc_context *idmap_alloc_ldap;
  90
  91 /*********************************************************************
  92  ********************************************************************/
  93
  94 static NTSTATUS get_credentials( TALLOC_CTX *mem_ctx,
  95                                  struct smbldap_state *ldap_state,
  96                                  const char *config_option,
  97                                  struct idmap_domain *dom,
  98                                  char **dn )
  99 {
 100         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 101         char *secret = NULL;
 102         const char *tmp = NULL;
 103         char *user_dn = NULL;
 104         bool anon = False;
 105
 106         /* assume anonymous if we don't have a specified user */
 107
 108         tmp = lp_parm_const_string(-1, config_option, "ldap_user_dn", NULL);
 109
 110         if ( tmp ) {
 111                 if (!dom) {
 112                         /* only the alloc backend can pass in a NULL dom */
 113                         secret = idmap_fetch_secret("ldap", True,
 114                                                     NULL, tmp);
 115                 } else {
 116                         secret = idmap_fetch_secret("ldap", False,
 117                                                     dom->name, tmp);
 118                 }
 119
 120                 if (!secret) {
 121                         DEBUG(0, ("get_credentials: Unable to fetch "
 122                                   "auth credentials for %s in %s\n",
 123                                   tmp, (dom==NULL)?"ALLOC":dom->name));
 124                         ret = NT_STATUS_ACCESS_DENIED;
 125                         goto done;
 126                 }
 127                 *dn = talloc_strdup(mem_ctx, tmp);
 128                 CHECK_ALLOC_DONE(*dn);
 129         } else {
 130                 if (!fetch_ldap_pw(&user_dn, &secret)) {
 131                         DEBUG(2, ("get_credentials: Failed to lookup ldap "
 132                                   "bind creds. Using anonymous connection.\n"));
 133                         anon = True;
 134                         *dn = NULL;
 135                 } else {
 136                         *dn = talloc_strdup(mem_ctx, user_dn);
 137                         SAFE_FREE( user_dn );
 138                         CHECK_ALLOC_DONE(*dn);
 139                 }
 140         }
 141
 142         smbldap_set_creds(ldap_state, anon, *dn, secret);
 143         ret = NT_STATUS_OK;
 144
 145 done:
 146         SAFE_FREE(secret);
 147
 148         return ret;
 149 }
 150
 151
 152 /**********************************************************************
 153  Verify the sambaUnixIdPool entry in the directory.
 154 **********************************************************************/
 155
 156 static NTSTATUS verify_idpool(void)
 157 {
 158         NTSTATUS ret;
 159         TALLOC_CTX *ctx;
 160         LDAPMessage *result = NULL;
 161         LDAPMod **mods = NULL;
 162         const char **attr_list;
 163         char *filter;
 164         int count;
 165         int rc;
 166
 167         if ( ! idmap_alloc_ldap) {
 168                 return NT_STATUS_UNSUCCESSFUL;
 169         }
 170
 171         ctx = talloc_new(idmap_alloc_ldap);
 172         if ( ! ctx) {
 173                 DEBUG(0, ("Out of memory!\n"));
 174                 return NT_STATUS_NO_MEMORY;
 175         }
 176
 177         filter = talloc_asprintf(ctx, "(objectclass=%s)", LDAP_OBJ_IDPOOL);
 178         CHECK_ALLOC_DONE(filter);
 179
 180         attr_list = get_attr_list(ctx, idpool_attr_list);
 181         CHECK_ALLOC_DONE(attr_list);
 182
 183         rc = smbldap_search(idmap_alloc_ldap->smbldap_state,
 184                                 idmap_alloc_ldap->suffix,
 185                                 LDAP_SCOPE_SUBTREE,
 186                                 filter,
 187                                 attr_list,
 188                                 0,
 189                                 &result);
 190
 191         if (rc != LDAP_SUCCESS) {
 192                 DEBUG(1, ("Unable to verify the idpool, "
 193                           "cannot continue initialization!\n"));
 194                 return NT_STATUS_UNSUCCESSFUL;
 195         }
 196
 197         count = ldap_count_entries(idmap_alloc_ldap->smbldap_state->ldap_struct,
 198                                    result);
 199
 200         ldap_msgfree(result);
 201
 202         if ( count > 1 ) {
 203                 DEBUG(0,("Multiple entries returned from %s (base == %s)\n",
 204                         filter, idmap_alloc_ldap->suffix));
 205                 ret = NT_STATUS_UNSUCCESSFUL;
 206                 goto done;
 207         }
 208         else if (count == 0) {
 209                 char *uid_str, *gid_str;
 210
 211                 uid_str = talloc_asprintf(ctx, "%lu",
 212                                 (unsigned long)idmap_alloc_ldap->low_uid);
 213                 gid_str = talloc_asprintf(ctx, "%lu",
 214                                 (unsigned long)idmap_alloc_ldap->low_gid);
 215
 216                 smbldap_set_mod(&mods, LDAP_MOD_ADD,
 217                                 "objectClass", LDAP_OBJ_IDPOOL);
 218                 smbldap_set_mod(&mods, LDAP_MOD_ADD,
 219                                 get_attr_key2string(idpool_attr_list,
 220                                                     LDAP_ATTR_UIDNUMBER),
 221                                 uid_str);
 222                 smbldap_set_mod(&mods, LDAP_MOD_ADD,
 223                                 get_attr_key2string(idpool_attr_list,
 224                                                     LDAP_ATTR_GIDNUMBER),
 225                                 gid_str);
 226                 if (mods) {
 227                         rc = smbldap_modify(idmap_alloc_ldap->smbldap_state,
 228                                                 idmap_alloc_ldap->suffix,
 229                                                 mods);
 230                         ldap_mods_free(mods, True);
 231                 } else {
 232                         ret = NT_STATUS_UNSUCCESSFUL;
 233                         goto done;
 234                 }
 235         }
 236
 237         ret = (rc == LDAP_SUCCESS)?NT_STATUS_OK:NT_STATUS_UNSUCCESSFUL;
 238 done:
 239         talloc_free(ctx);
 240         return ret;
 241 }
 242
 243 /*****************************************************************************
 244  Initialise idmap database.
 245 *****************************************************************************/
 246
 247 static NTSTATUS idmap_ldap_alloc_init(const char *params)
 248 {
 249         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 250         const char *tmp;
 251         uid_t low_uid = 0;
 252         uid_t high_uid = 0;
 253         gid_t low_gid = 0;
 254         gid_t high_gid = 0;
 255
 256         /* Only do init if we are online */
 257         if (idmap_is_offline()) {
 258                 return NT_STATUS_FILE_IS_OFFLINE;
 259         }
 260
 261         idmap_alloc_ldap = TALLOC_ZERO_P(NULL, struct idmap_ldap_alloc_context);
 262         CHECK_ALLOC_DONE( idmap_alloc_ldap );
 263
 264         /* load ranges */
 265
 266         if (!lp_idmap_uid(&low_uid, &high_uid)
 267             || !lp_idmap_gid(&low_gid, &high_gid)) {
 268                 DEBUG(1, ("idmap uid or idmap gid missing\n"));
 269                 ret = NT_STATUS_UNSUCCESSFUL;
 270                 goto done;
 271         }
 272
 273         idmap_alloc_ldap->low_uid = low_uid;
 274         idmap_alloc_ldap->high_uid = high_uid;
 275         idmap_alloc_ldap->low_gid = low_gid;
 276         idmap_alloc_ldap->high_gid= high_gid;
 277
 278         if (idmap_alloc_ldap->high_uid <= idmap_alloc_ldap->low_uid) {
 279                 DEBUG(1, ("idmap uid range invalid\n"));
 280                 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
 281                 ret = NT_STATUS_UNSUCCESSFUL;
 282                 goto done;
 283         }
 284
 285         if (idmap_alloc_ldap->high_gid <= idmap_alloc_ldap->low_gid) {
 286                 DEBUG(1, ("idmap gid range invalid\n"));
 287                 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
 288                 ret = NT_STATUS_UNSUCCESSFUL;
 289                 goto done;
 290         }
 291
 292         if (params && *params) {
 293                 /* assume location is the only parameter */
 294                 idmap_alloc_ldap->url = talloc_strdup(idmap_alloc_ldap, params);
 295         } else {
 296                 tmp = lp_parm_const_string(-1, "idmap alloc config",
 297                                            "ldap_url", NULL);
 298
 299                 if ( ! tmp) {
 300                         DEBUG(1, ("ERROR: missing idmap ldap url\n"));
 301                         ret = NT_STATUS_UNSUCCESSFUL;
 302                         goto done;
 303                 }
 304
 305                 idmap_alloc_ldap->url = talloc_strdup(idmap_alloc_ldap, tmp);
 306         }
 307         CHECK_ALLOC_DONE( idmap_alloc_ldap->url );
 308
 309         tmp = lp_parm_const_string(-1, "idmap alloc config",
 310                                    "ldap_base_dn", NULL);
 311         if ( ! tmp || ! *tmp) {
 312                 tmp = lp_ldap_idmap_suffix();
 313                 if ( ! tmp) {
 314                         DEBUG(1, ("ERROR: missing idmap ldap suffix\n"));
 315                         ret = NT_STATUS_UNSUCCESSFUL;
 316                         goto done;
 317                 }
 318         }
 319
 320         idmap_alloc_ldap->suffix = talloc_strdup(idmap_alloc_ldap, tmp);
 321         CHECK_ALLOC_DONE( idmap_alloc_ldap->suffix );
 322
 323         ret = smbldap_init(idmap_alloc_ldap, winbind_event_context(),
 324                            idmap_alloc_ldap->url,
 325                            &idmap_alloc_ldap->smbldap_state);
 326         if (!NT_STATUS_IS_OK(ret)) {
 327                 DEBUG(1, ("ERROR: smbldap_init (%s) failed!\n",
 328                           idmap_alloc_ldap->url));
 329                 goto done;
 330         }
 331
 332         ret = get_credentials( idmap_alloc_ldap,
 333                                idmap_alloc_ldap->smbldap_state,
 334                                "idmap alloc config", NULL,
 335                                &idmap_alloc_ldap->user_dn );
 336         if ( !NT_STATUS_IS_OK(ret) ) {
 337                 DEBUG(1,("idmap_ldap_alloc_init: Failed to get connection "
 338                          "credentials (%s)\n", nt_errstr(ret)));
 339                 goto done;
 340         }
 341
 342         /* see if the idmap suffix and sub entries exists */
 343
 344         ret = verify_idpool();
 345
 346  done:
 347         if ( !NT_STATUS_IS_OK( ret ) )
 348                 TALLOC_FREE( idmap_alloc_ldap );
 349
 350         return ret;
 351 }
 352
 353 /********************************
 354  Allocate a new uid or gid
 355 ********************************/
 356
 357 static NTSTATUS idmap_ldap_allocate_id(struct unixid *xid)
 358 {
 359         TALLOC_CTX *ctx;
 360         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 361         int rc = LDAP_SERVER_DOWN;
 362         int count = 0;
 363         LDAPMessage *result = NULL;
 364         LDAPMessage *entry = NULL;
 365         LDAPMod **mods = NULL;
 366         char *id_str;
 367         char *new_id_str;
 368         char *filter = NULL;
 369         const char *dn = NULL;
 370         const char **attr_list;
 371         const char *type;
 372
 373         /* Only do query if we are online */
 374         if (idmap_is_offline()) {
 375                 return NT_STATUS_FILE_IS_OFFLINE;
 376         }
 377
 378         if ( ! idmap_alloc_ldap) {
 379                 return NT_STATUS_UNSUCCESSFUL;
 380         }
 381
 382         ctx = talloc_new(idmap_alloc_ldap);
 383         if ( ! ctx) {
 384                 DEBUG(0, ("Out of memory!\n"));
 385                 return NT_STATUS_NO_MEMORY;
 386         }
 387
 388         /* get type */
 389         switch (xid->type) {
 390
 391         case ID_TYPE_UID:
 392                 type = get_attr_key2string(idpool_attr_list,
 393                                            LDAP_ATTR_UIDNUMBER);
 394                 break;
 395
 396         case ID_TYPE_GID:
 397                 type = get_attr_key2string(idpool_attr_list,
 398                                            LDAP_ATTR_GIDNUMBER);
 399                 break;
 400
 401         default:
 402                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 403                 return NT_STATUS_INVALID_PARAMETER;
 404         }
 405
 406         filter = talloc_asprintf(ctx, "(objectClass=%s)", LDAP_OBJ_IDPOOL);
 407         CHECK_ALLOC_DONE(filter);
 408
 409         attr_list = get_attr_list(ctx, idpool_attr_list);
 410         CHECK_ALLOC_DONE(attr_list);
 411
 412         DEBUG(10, ("Search of the id pool (filter: %s)\n", filter));
 413
 414         rc = smbldap_search(idmap_alloc_ldap->smbldap_state,
 415                                 idmap_alloc_ldap->suffix,
 416                                LDAP_SCOPE_SUBTREE, filter,
 417                                attr_list, 0, &result);
 418
 419         if (rc != LDAP_SUCCESS) {
 420                 DEBUG(0,("%s object not found\n", LDAP_OBJ_IDPOOL));
 421                 goto done;
 422         }
 423
 424         talloc_autofree_ldapmsg(ctx, result);
 425
 426         count = ldap_count_entries(idmap_alloc_ldap->smbldap_state->ldap_struct,
 427                                    result);
 428         if (count != 1) {
 429                 DEBUG(0,("Single %s object not found\n", LDAP_OBJ_IDPOOL));
 430                 goto done;
 431         }
 432
 433         entry = ldap_first_entry(idmap_alloc_ldap->smbldap_state->ldap_struct,
 434                                  result);
 435
 436         dn = smbldap_talloc_dn(ctx,
 437                                idmap_alloc_ldap->smbldap_state->ldap_struct,
 438                                entry);
 439         if ( ! dn) {
 440                 goto done;
 441         }
 442
 443         if ( ! (id_str = smbldap_talloc_single_attribute(idmap_alloc_ldap->smbldap_state->ldap_struct,
 444                                 entry, type, ctx))) {
 445                 DEBUG(0,("%s attribute not found\n", type));
 446                 goto done;
 447         }
 448         if ( ! id_str) {
 449                 DEBUG(0,("Out of memory\n"));
 450                 ret = NT_STATUS_NO_MEMORY;
 451                 goto done;
 452         }
 453
 454         xid->id = strtoul(id_str, NULL, 10);
 455
 456         /* make sure we still have room to grow */
 457
 458         switch (xid->type) {
 459         case ID_TYPE_UID:
 460                 if (xid->id > idmap_alloc_ldap->high_uid) {
 461                         DEBUG(0,("Cannot allocate uid above %lu!\n",
 462                                  (unsigned long)idmap_alloc_ldap->high_uid));
 463                         goto done;
 464                 }
 465                 break;
 466
 467         case ID_TYPE_GID:
 468                 if (xid->id > idmap_alloc_ldap->high_gid) {
 469                         DEBUG(0,("Cannot allocate gid above %lu!\n",
 470                                  (unsigned long)idmap_alloc_ldap->high_uid));
 471                         goto done;
 472                 }
 473                 break;
 474
 475         default:
 476                 /* impossible */
 477                 goto done;
 478         }
 479
 480         new_id_str = talloc_asprintf(ctx, "%lu", (unsigned long)xid->id + 1);
 481         if ( ! new_id_str) {
 482                 DEBUG(0,("Out of memory\n"));
 483                 ret = NT_STATUS_NO_MEMORY;
 484                 goto done;
 485         }
 486
 487         smbldap_set_mod(&mods, LDAP_MOD_DELETE, type, id_str);
 488         smbldap_set_mod(&mods, LDAP_MOD_ADD, type, new_id_str);
 489
 490         if (mods == NULL) {
 491                 DEBUG(0,("smbldap_set_mod() failed.\n"));
 492                 goto done;
 493         }
 494
 495         DEBUG(10, ("Try to atomically increment the id (%s -> %s)\n",
 496                    id_str, new_id_str));
 497
 498         rc = smbldap_modify(idmap_alloc_ldap->smbldap_state, dn, mods);
 499
 500         ldap_mods_free(mods, True);
 501
 502         if (rc != LDAP_SUCCESS) {
 503                 DEBUG(1,("Failed to allocate new %s. "
 504                          "smbldap_modify() failed.\n", type));
 505                 goto done;
 506         }
 507
 508         ret = NT_STATUS_OK;
 509
 510 done:
 511         talloc_free(ctx);
 512         return ret;
 513 }
 514
 515 /**********************************
 516  Get current highest id.
 517 **********************************/
 518
 519 static NTSTATUS idmap_ldap_get_hwm(struct unixid *xid)
 520 {
 521         TALLOC_CTX *memctx;
 522         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 523         int rc = LDAP_SERVER_DOWN;
 524         int count = 0;
 525         LDAPMessage *result = NULL;
 526         LDAPMessage *entry = NULL;
 527         char *id_str;
 528         char *filter = NULL;
 529         const char **attr_list;
 530         const char *type;
 531
 532         /* Only do query if we are online */
 533         if (idmap_is_offline()) {
 534                 return NT_STATUS_FILE_IS_OFFLINE;
 535         }
 536
 537         if ( ! idmap_alloc_ldap) {
 538                 return NT_STATUS_UNSUCCESSFUL;
 539         }
 540
 541         memctx = talloc_new(idmap_alloc_ldap);
 542         if ( ! memctx) {
 543                 DEBUG(0, ("Out of memory!\n"));
 544                 return NT_STATUS_NO_MEMORY;
 545         }
 546
 547         /* get type */
 548         switch (xid->type) {
 549
 550         case ID_TYPE_UID:
 551                 type = get_attr_key2string(idpool_attr_list,
 552                                            LDAP_ATTR_UIDNUMBER);
 553                 break;
 554
 555         case ID_TYPE_GID:
 556                 type = get_attr_key2string(idpool_attr_list,
 557                                            LDAP_ATTR_GIDNUMBER);
 558                 break;
 559
 560         default:
 561                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 562                 return NT_STATUS_INVALID_PARAMETER;
 563         }
 564
 565         filter = talloc_asprintf(memctx, "(objectClass=%s)", LDAP_OBJ_IDPOOL);
 566         CHECK_ALLOC_DONE(filter);
 567
 568         attr_list = get_attr_list(memctx, idpool_attr_list);
 569         CHECK_ALLOC_DONE(attr_list);
 570
 571         rc = smbldap_search(idmap_alloc_ldap->smbldap_state,
 572                                 idmap_alloc_ldap->suffix,
 573                                LDAP_SCOPE_SUBTREE, filter,
 574                                attr_list, 0, &result);
 575
 576         if (rc != LDAP_SUCCESS) {
 577                 DEBUG(0,("%s object not found\n", LDAP_OBJ_IDPOOL));
 578                 goto done;
 579         }
 580
 581         talloc_autofree_ldapmsg(memctx, result);
 582
 583         count = ldap_count_entries(idmap_alloc_ldap->smbldap_state->ldap_struct,
 584                                    result);
 585         if (count != 1) {
 586                 DEBUG(0,("Single %s object not found\n", LDAP_OBJ_IDPOOL));
 587                 goto done;
 588         }
 589
 590         entry = ldap_first_entry(idmap_alloc_ldap->smbldap_state->ldap_struct,
 591                                  result);
 592
 593         id_str = smbldap_talloc_single_attribute(idmap_alloc_ldap->smbldap_state->ldap_struct,
 594                         entry, type, memctx);
 595         if ( ! id_str) {
 596                 DEBUG(0,("%s attribute not found\n", type));
 597                 goto done;
 598         }
 599         if ( ! id_str) {
 600                 DEBUG(0,("Out of memory\n"));
 601                 ret = NT_STATUS_NO_MEMORY;
 602                 goto done;
 603         }
 604
 605         xid->id = strtoul(id_str, NULL, 10);
 606
 607         ret = NT_STATUS_OK;
 608 done:
 609         talloc_free(memctx);
 610         return ret;
 611 }
 612 /**********************************
 613  Set highest id.
 614 **********************************/
 615
 616 static NTSTATUS idmap_ldap_set_hwm(struct unixid *xid)
 617 {
 618         TALLOC_CTX *ctx;
 619         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 620         int rc = LDAP_SERVER_DOWN;
 621         int count = 0;
 622         LDAPMessage *result = NULL;
 623         LDAPMessage *entry = NULL;
 624         LDAPMod **mods = NULL;
 625         char *new_id_str;
 626         char *filter = NULL;
 627         const char *dn = NULL;
 628         const char **attr_list;
 629         const char *type;
 630
 631         /* Only do query if we are online */
 632         if (idmap_is_offline()) {
 633                 return NT_STATUS_FILE_IS_OFFLINE;
 634         }
 635
 636         if ( ! idmap_alloc_ldap) {
 637                 return NT_STATUS_UNSUCCESSFUL;
 638         }
 639
 640         ctx = talloc_new(idmap_alloc_ldap);
 641         if ( ! ctx) {
 642                 DEBUG(0, ("Out of memory!\n"));
 643                 return NT_STATUS_NO_MEMORY;
 644         }
 645
 646         /* get type */
 647         switch (xid->type) {
 648
 649         case ID_TYPE_UID:
 650                 type = get_attr_key2string(idpool_attr_list,
 651                                            LDAP_ATTR_UIDNUMBER);
 652                 break;
 653
 654         case ID_TYPE_GID:
 655                 type = get_attr_key2string(idpool_attr_list,
 656                                            LDAP_ATTR_GIDNUMBER);
 657                 break;
 658
 659         default:
 660                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 661                 return NT_STATUS_INVALID_PARAMETER;
 662         }
 663
 664         filter = talloc_asprintf(ctx, "(objectClass=%s)", LDAP_OBJ_IDPOOL);
 665         CHECK_ALLOC_DONE(filter);
 666
 667         attr_list = get_attr_list(ctx, idpool_attr_list);
 668         CHECK_ALLOC_DONE(attr_list);
 669
 670         rc = smbldap_search(idmap_alloc_ldap->smbldap_state,
 671                                 idmap_alloc_ldap->suffix,
 672                                LDAP_SCOPE_SUBTREE, filter,
 673                                attr_list, 0, &result);
 674
 675         if (rc != LDAP_SUCCESS) {
 676                 DEBUG(0,("%s object not found\n", LDAP_OBJ_IDPOOL));
 677                 goto done;
 678         }
 679
 680         talloc_autofree_ldapmsg(ctx, result);
 681
 682         count = ldap_count_entries(idmap_alloc_ldap->smbldap_state->ldap_struct,
 683                                    result);
 684         if (count != 1) {
 685                 DEBUG(0,("Single %s object not found\n", LDAP_OBJ_IDPOOL));
 686                 goto done;
 687         }
 688
 689         entry = ldap_first_entry(idmap_alloc_ldap->smbldap_state->ldap_struct,
 690                                  result);
 691
 692         dn = smbldap_talloc_dn(ctx,
 693                                 idmap_alloc_ldap->smbldap_state->ldap_struct,
 694                                 entry);
 695         if ( ! dn) {
 696                 goto done;
 697         }
 698
 699         new_id_str = talloc_asprintf(ctx, "%lu", (unsigned long)xid->id);
 700         if ( ! new_id_str) {
 701                 DEBUG(0,("Out of memory\n"));
 702                 ret = NT_STATUS_NO_MEMORY;
 703                 goto done;
 704         }
 705
 706         smbldap_set_mod(&mods, LDAP_MOD_REPLACE, type, new_id_str);
 707
 708         if (mods == NULL) {
 709                 DEBUG(0,("smbldap_set_mod() failed.\n"));
 710                 goto done;
 711         }
 712
 713         rc = smbldap_modify(idmap_alloc_ldap->smbldap_state, dn, mods);
 714
 715         ldap_mods_free(mods, True);
 716
 717         if (rc != LDAP_SUCCESS) {
 718                 DEBUG(1,("Failed to allocate new %s. "
 719                          "smbldap_modify() failed.\n", type));
 720                 goto done;
 721         }
 722
 723         ret = NT_STATUS_OK;
 724
 725 done:
 726         talloc_free(ctx);
 727         return ret;
 728 }
 729
 730 /**********************************
 731  Close idmap ldap alloc
 732 **********************************/
 733
 734 static NTSTATUS idmap_ldap_alloc_close(void)
 735 {
 736         if (idmap_alloc_ldap) {
 737                 smbldap_free_struct(&idmap_alloc_ldap->smbldap_state);
 738                 DEBUG(5,("The connection to the LDAP server was closed\n"));
 739                 /* maybe free the results here --metze */
 740                 TALLOC_FREE(idmap_alloc_ldap);
 741         }
 742         return NT_STATUS_OK;
 743 }
 744
 745
 746 /**********************************************************************
 747  IDMAP MAPPING LDAP BACKEND
 748 **********************************************************************/
 749
 750 static int idmap_ldap_close_destructor(struct idmap_ldap_context *ctx)
 751 {
 752         smbldap_free_struct(&ctx->smbldap_state);
 753         DEBUG(5,("The connection to the LDAP server was closed\n"));
 754         /* maybe free the results here --metze */
 755
 756         return 0;
 757 }
 758
 759 /********************************
 760  Initialise idmap database.
 761 ********************************/
 762
 763 static NTSTATUS idmap_ldap_db_init(struct idmap_domain *dom,
 764                                    const char *params)
 765 {
 766         NTSTATUS ret;
 767         struct idmap_ldap_context *ctx = NULL;
 768         char *config_option = NULL;
 769         const char *tmp = NULL;
 770
 771         /* Only do init if we are online */
 772         if (idmap_is_offline()) {
 773                 return NT_STATUS_FILE_IS_OFFLINE;
 774         }
 775
 776         ctx = TALLOC_ZERO_P(dom, struct idmap_ldap_context);
 777         if ( ! ctx) {
 778                 DEBUG(0, ("Out of memory!\n"));
 779                 return NT_STATUS_NO_MEMORY;
 780         }
 781
 782         if (strequal(dom->name, "*")) {
 783                 uid_t low_uid = 0;
 784                 uid_t high_uid = 0;
 785                 gid_t low_gid = 0;
 786                 gid_t high_gid = 0;
 787
 788                 ctx->filter_low_id = 0;
 789                 ctx->filter_high_id = 0;
 790
 791                 if (lp_idmap_uid(&low_uid, &high_uid)) {
 792                         ctx->filter_low_id = low_uid;
 793                         ctx->filter_high_id = high_uid;
 794                 } else {
 795                         DEBUG(3, ("Warning: 'idmap uid' not set!\n"));
 796                 }
 797
 798                 if (lp_idmap_gid(&low_gid, &high_gid)) {
 799                         if ((low_gid != low_uid) || (high_gid != high_uid)) {
 800                                 DEBUG(1, ("Warning: 'idmap uid' and 'idmap gid'"
 801                                       " ranges do not agree -- building "
 802                                       "intersection\n"));
 803                                 ctx->filter_low_id = MAX(ctx->filter_low_id,
 804                                                          low_gid);
 805                                 ctx->filter_high_id = MIN(ctx->filter_high_id,
 806                                                           high_gid);
 807                         }
 808                 } else {
 809                         DEBUG(3, ("Warning: 'idmap gid' not set!\n"));
 810                 }
 811         } else {
 812                 const char *range = NULL;
 813
 814                 config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 815                 if ( ! config_option) {
 816                         DEBUG(0, ("Out of memory!\n"));
 817                         ret = NT_STATUS_NO_MEMORY;
 818                         goto done;
 819                 }
 820
 821                 /* load ranges */
 822                 range = lp_parm_const_string(-1, config_option, "range", NULL);
 823                 if (range && range[0]) {
 824                         if ((sscanf(range, "%u - %u", &ctx->filter_low_id,
 825                                                         &ctx->filter_high_id) != 2))
 826                         {
 827                                 DEBUG(1, ("ERROR: invalid filter range [%s]", range));
 828                                 ctx->filter_low_id = 0;
 829                                 ctx->filter_high_id = 0;
 830                         }
 831                 }
 832         }
 833
 834         if (ctx->filter_low_id > ctx->filter_high_id) {
 835                 DEBUG(1, ("ERROR: invalid filter range [%u-%u]",
 836                       ctx->filter_low_id, ctx->filter_high_id));
 837                 ctx->filter_low_id = 0;
 838                 ctx->filter_high_id = 0;
 839         }
 840
 841         if (params != NULL) {
 842                 /* assume location is the only parameter */
 843                 ctx->url = talloc_strdup(ctx, params);
 844         } else {
 845                 tmp = lp_parm_const_string(-1, config_option, "ldap_url", NULL);
 846
 847                 if ( ! tmp) {
 848                         DEBUG(1, ("ERROR: missing idmap ldap url\n"));
 849                         ret = NT_STATUS_UNSUCCESSFUL;
 850                         goto done;
 851                 }
 852
 853                 ctx->url = talloc_strdup(ctx, tmp);
 854         }
 855         CHECK_ALLOC_DONE(ctx->url);
 856
 857         tmp = lp_parm_const_string(-1, config_option, "ldap_base_dn", NULL);
 858         if ( ! tmp || ! *tmp) {
 859                 tmp = lp_ldap_idmap_suffix();
 860                 if ( ! tmp) {
 861                         DEBUG(1, ("ERROR: missing idmap ldap suffix\n"));
 862                         ret = NT_STATUS_UNSUCCESSFUL;
 863                         goto done;
 864                 }
 865         }
 866
 867         ctx->suffix = talloc_strdup(ctx, tmp);
 868         CHECK_ALLOC_DONE(ctx->suffix);
 869
 870         ret = smbldap_init(ctx, winbind_event_context(), ctx->url,
 871                            &ctx->smbldap_state);
 872         if (!NT_STATUS_IS_OK(ret)) {
 873                 DEBUG(1, ("ERROR: smbldap_init (%s) failed!\n", ctx->url));
 874                 goto done;
 875         }
 876
 877         ret = get_credentials( ctx, ctx->smbldap_state, config_option,
 878                                dom, &ctx->user_dn );
 879         if ( !NT_STATUS_IS_OK(ret) ) {
 880                 DEBUG(1,("idmap_ldap_db_init: Failed to get connection "
 881                          "credentials (%s)\n", nt_errstr(ret)));
 882                 goto done;
 883         }
 884
 885         /* set the destructor on the context, so that resource are properly
 886            freed if the contexts is released */
 887
 888         talloc_set_destructor(ctx, idmap_ldap_close_destructor);
 889
 890         dom->private_data = ctx;
 891
 892         talloc_free(config_option);
 893         return NT_STATUS_OK;
 894
 895 /*failed */
 896 done:
 897         talloc_free(ctx);
 898         return ret;
 899 }
 900
 901 /* max number of ids requested per batch query */
 902 #define IDMAP_LDAP_MAX_IDS 30
 903
 904 /**********************************
 905  lookup a set of unix ids.
 906 **********************************/
 907
 908 /* this function searches up to IDMAP_LDAP_MAX_IDS entries
 909  * in maps for a match */
 910 static struct id_map *find_map_by_id(struct id_map **maps,
 911                                      enum id_type type,
 912                                      uint32_t id)
 913 {
 914         int i;
 915
 916         for (i = 0; i < IDMAP_LDAP_MAX_IDS; i++) {
 917                 if (maps[i] == NULL) { /* end of the run */
 918                         return NULL;
 919                 }
 920                 if ((maps[i]->xid.type == type) && (maps[i]->xid.id == id)) {
 921                         return maps[i];
 922                 }
 923         }
 924
 925         return NULL;
 926 }
 927
 928 static NTSTATUS idmap_ldap_unixids_to_sids(struct idmap_domain *dom,
 929                                            struct id_map **ids)
 930 {
 931         NTSTATUS ret;
 932         TALLOC_CTX *memctx;
 933         struct idmap_ldap_context *ctx;
 934         LDAPMessage *result = NULL;
 935         LDAPMessage *entry = NULL;
 936         const char *uidNumber;
 937         const char *gidNumber;
 938         const char **attr_list;
 939         char *filter = NULL;
 940         bool multi = False;
 941         int idx = 0;
 942         int bidx = 0;
 943         int count;
 944         int rc;
 945         int i;
 946
 947         /* Only do query if we are online */
 948         if (idmap_is_offline()) {
 949                 return NT_STATUS_FILE_IS_OFFLINE;
 950         }
 951
 952         ctx = talloc_get_type(dom->private_data, struct idmap_ldap_context);
 953
 954         memctx = talloc_new(ctx);
 955         if ( ! memctx) {
 956                 DEBUG(0, ("Out of memory!\n"));
 957                 return NT_STATUS_NO_MEMORY;
 958         }
 959
 960         uidNumber = get_attr_key2string(idpool_attr_list, LDAP_ATTR_UIDNUMBER);
 961         gidNumber = get_attr_key2string(idpool_attr_list, LDAP_ATTR_GIDNUMBER);
 962
 963         attr_list = get_attr_list(memctx, sidmap_attr_list);
 964
 965         if ( ! ids[1]) {
 966                 /* if we are requested just one mapping use the simple filter */
 967
 968                 filter = talloc_asprintf(memctx, "(&(objectClass=%s)(%s=%lu))",
 969                                 LDAP_OBJ_IDMAP_ENTRY,
 970                                 (ids[0]->xid.type==ID_TYPE_UID)?uidNumber:gidNumber,
 971                                 (unsigned long)ids[0]->xid.id);
 972                 CHECK_ALLOC_DONE(filter);
 973                 DEBUG(10, ("Filter: [%s]\n", filter));
 974         } else {
 975                 /* multiple mappings */
 976                 multi = True;
 977         }
 978
 979         for (i = 0; ids[i]; i++) {
 980                 ids[i]->status = ID_UNKNOWN;
 981         }
 982
 983 again:
 984         if (multi) {
 985
 986                 talloc_free(filter);
 987                 filter = talloc_asprintf(memctx,
 988                                          "(&(objectClass=%s)(|",
 989                                          LDAP_OBJ_IDMAP_ENTRY);
 990                 CHECK_ALLOC_DONE(filter);
 991
 992                 bidx = idx;
 993                 for (i = 0; (i < IDMAP_LDAP_MAX_IDS) && ids[idx]; i++, idx++) {
 994                         filter = talloc_asprintf_append_buffer(filter, "(%s=%lu)",
 995                                         (ids[idx]->xid.type==ID_TYPE_UID)?uidNumber:gidNumber,
 996                                         (unsigned long)ids[idx]->xid.id);
 997                         CHECK_ALLOC_DONE(filter);
 998                 }
 999                 filter = talloc_asprintf_append_buffer(filter, "))");
1000                 CHECK_ALLOC_DONE(filter);
1001                 DEBUG(10, ("Filter: [%s]\n", filter));
1002         } else {
1003                 bidx = 0;
1004                 idx = 1;
1005         }
1006
1007         rc = smbldap_search(ctx->smbldap_state, ctx->suffix, LDAP_SCOPE_SUBTREE,
1008                 filter, attr_list, 0, &result);
1009
1010         if (rc != LDAP_SUCCESS) {
1011                 DEBUG(3,("Failure looking up ids (%s)\n", ldap_err2string(rc)));
1012                 ret = NT_STATUS_UNSUCCESSFUL;
1013                 goto done;
1014         }
1015
1016         count = ldap_count_entries(ctx->smbldap_state->ldap_struct, result);
1017
1018         if (count == 0) {
1019                 DEBUG(10, ("NO SIDs found\n"));
1020         }
1021
1022         for (i = 0; i < count; i++) {
1023                 char *sidstr = NULL;
1024                 char *tmp = NULL;
1025                 enum id_type type;
1026                 struct id_map *map;
1027                 uint32_t id;
1028
1029                 if (i == 0) { /* first entry */
1030                         entry = ldap_first_entry(ctx->smbldap_state->ldap_struct,
1031                                                  result);
1032                 } else { /* following ones */
1033                         entry = ldap_next_entry(ctx->smbldap_state->ldap_struct,
1034                                                 entry);
1035                 }
1036                 if ( ! entry) {
1037                         DEBUG(2, ("ERROR: Unable to fetch ldap entries "
1038                                   "from results\n"));
1039                         break;
1040                 }
1041
1042                 /* first check if the SID is present */
1043                 sidstr = smbldap_talloc_single_attribute(
1044                                 ctx->smbldap_state->ldap_struct,
1045                                 entry, LDAP_ATTRIBUTE_SID, memctx);
1046                 if ( ! sidstr) { /* no sid, skip entry */
1047                         DEBUG(2, ("WARNING SID not found on entry\n"));
1048                         continue;
1049                 }
1050
1051                 /* now try to see if it is a uid, if not try with a gid
1052                  * (gid is more common, but in case both uidNumber and
1053                  * gidNumber are returned the SID is mapped to the uid
1054                  *not the gid) */
1055                 type = ID_TYPE_UID;
1056                 tmp = smbldap_talloc_single_attribute(
1057                                 ctx->smbldap_state->ldap_struct,
1058                                 entry, uidNumber, memctx);
1059                 if ( ! tmp) {
1060                         type = ID_TYPE_GID;
1061                         tmp = smbldap_talloc_single_attribute(
1062                                         ctx->smbldap_state->ldap_struct,
1063                                         entry, gidNumber, memctx);
1064                 }
1065                 if ( ! tmp) { /* wow very strange entry, how did it match ? */
1066                         DEBUG(5, ("Unprobable match on (%s), no uidNumber, "
1067                                   "nor gidNumber returned\n", sidstr));
1068                         TALLOC_FREE(sidstr);
1069                         continue;
1070                 }
1071
1072                 id = strtoul(tmp, NULL, 10);
1073                 if ((id == 0) ||
1074                     (ctx->filter_low_id && (id < ctx->filter_low_id)) ||
1075                     (ctx->filter_high_id && (id > ctx->filter_high_id))) {
1076                         DEBUG(5, ("Requested id (%u) out of range (%u - %u). "
1077                                   "Filtered!\n", id,
1078                                   ctx->filter_low_id, ctx->filter_high_id));
1079                         TALLOC_FREE(sidstr);
1080                         TALLOC_FREE(tmp);
1081                         continue;
1082                 }
1083                 TALLOC_FREE(tmp);
1084
1085                 map = find_map_by_id(&ids[bidx], type, id);
1086                 if (!map) {
1087                         DEBUG(2, ("WARNING: couldn't match sid (%s) "
1088                                   "with requested ids\n", sidstr));
1089                         TALLOC_FREE(sidstr);
1090                         continue;
1091                 }
1092
1093                 if ( ! string_to_sid(map->sid, sidstr)) {
1094                         DEBUG(2, ("ERROR: Invalid SID on entry\n"));
1095                         TALLOC_FREE(sidstr);
1096                         continue;
1097                 }
1098
1099                 if (map->status == ID_MAPPED) {
1100                         DEBUG(1, ("WARNING: duplicate %s mapping in LDAP. "
1101                               "overwriting mapping %u -> %s with %u -> %s\n",
1102                               (type == ID_TYPE_UID) ? "UID" : "GID",
1103                               id, sid_string_dbg(map->sid), id, sidstr));
1104                 }
1105
1106                 TALLOC_FREE(sidstr);
1107
1108                 /* mapped */
1109                 map->status = ID_MAPPED;
1110
1111                 DEBUG(10, ("Mapped %s -> %lu (%d)\n", sid_string_dbg(map->sid),
1112                            (unsigned long)map->xid.id, map->xid.type));
1113         }
1114
1115         /* free the ldap results */
1116         if (result) {
1117                 ldap_msgfree(result);
1118                 result = NULL;
1119         }
1120
1121         if (multi && ids[idx]) { /* still some values to map */
1122                 goto again;
1123         }
1124
1125         ret = NT_STATUS_OK;
1126
1127         /* mark all unknwon/expired ones as unmapped */
1128         for (i = 0; ids[i]; i++) {
1129                 if (ids[i]->status != ID_MAPPED)
1130                         ids[i]->status = ID_UNMAPPED;
1131         }
1132
1133 done:
1134         talloc_free(memctx);
1135         return ret;
1136 }
1137
1138 /**********************************
1139  lookup a set of sids.
1140 **********************************/
1141
1142 /* this function searches up to IDMAP_LDAP_MAX_IDS entries
1143  * in maps for a match */
1144 static struct id_map *find_map_by_sid(struct id_map **maps, DOM_SID *sid)
1145 {
1146         int i;
1147
1148         for (i = 0; i < IDMAP_LDAP_MAX_IDS; i++) {
1149                 if (maps[i] == NULL) { /* end of the run */
1150                         return NULL;
1151                 }
1152                 if (sid_equal(maps[i]->sid, sid)) {
1153                         return maps[i];
1154                 }
1155         }
1156
1157         return NULL;
1158 }
1159
1160 static NTSTATUS idmap_ldap_sids_to_unixids(struct idmap_domain *dom,
1161                                            struct id_map **ids)
1162 {
1163         LDAPMessage *entry = NULL;
1164         NTSTATUS ret;
1165         TALLOC_CTX *memctx;
1166         struct idmap_ldap_context *ctx;
1167         LDAPMessage *result = NULL;
1168         const char *uidNumber;
1169         const char *gidNumber;
1170         const char **attr_list;
1171         char *filter = NULL;
1172         bool multi = False;
1173         int idx = 0;
1174         int bidx = 0;
1175         int count;
1176         int rc;
1177         int i;
1178
1179         /* Only do query if we are online */
1180         if (idmap_is_offline()) {
1181                 return NT_STATUS_FILE_IS_OFFLINE;
1182         }
1183
1184         ctx = talloc_get_type(dom->private_data, struct idmap_ldap_context);
1185
1186         memctx = talloc_new(ctx);
1187         if ( ! memctx) {
1188                 DEBUG(0, ("Out of memory!\n"));
1189                 return NT_STATUS_NO_MEMORY;
1190         }
1191
1192         uidNumber = get_attr_key2string(idpool_attr_list, LDAP_ATTR_UIDNUMBER);
1193         gidNumber = get_attr_key2string(idpool_attr_list, LDAP_ATTR_GIDNUMBER);
1194
1195         attr_list = get_attr_list(memctx, sidmap_attr_list);
1196
1197         if ( ! ids[1]) {
1198                 /* if we are requested just one mapping use the simple filter */
1199
1200                 filter = talloc_asprintf(memctx, "(&(objectClass=%s)(%s=%s))",
1201                                 LDAP_OBJ_IDMAP_ENTRY,
1202                                 LDAP_ATTRIBUTE_SID,
1203                                 sid_string_talloc(memctx, ids[0]->sid));
1204                 CHECK_ALLOC_DONE(filter);
1205                 DEBUG(10, ("Filter: [%s]\n", filter));
1206         } else {
1207                 /* multiple mappings */
1208                 multi = True;
1209         }
1210
1211         for (i = 0; ids[i]; i++) {
1212                 ids[i]->status = ID_UNKNOWN;
1213         }
1214
1215 again:
1216         if (multi) {
1217
1218                 TALLOC_FREE(filter);
1219                 filter = talloc_asprintf(memctx,
1220                                          "(&(objectClass=%s)(|",
1221                                          LDAP_OBJ_IDMAP_ENTRY);
1222                 CHECK_ALLOC_DONE(filter);
1223
1224                 bidx = idx;
1225                 for (i = 0; (i < IDMAP_LDAP_MAX_IDS) && ids[idx]; i++, idx++) {
1226                         filter = talloc_asprintf_append_buffer(filter, "(%s=%s)",
1227                                         LDAP_ATTRIBUTE_SID,
1228                                         sid_string_talloc(memctx,
1229                                                           ids[idx]->sid));
1230                         CHECK_ALLOC_DONE(filter);
1231                 }
1232                 filter = talloc_asprintf_append_buffer(filter, "))");
1233                 CHECK_ALLOC_DONE(filter);
1234                 DEBUG(10, ("Filter: [%s]", filter));
1235         } else {
1236                 bidx = 0;
1237                 idx = 1;
1238         }
1239
1240         rc = smbldap_search(ctx->smbldap_state, ctx->suffix, LDAP_SCOPE_SUBTREE,
1241                 filter, attr_list, 0, &result);
1242
1243         if (rc != LDAP_SUCCESS) {
1244                 DEBUG(3,("Failure looking up sids (%s)\n",
1245                          ldap_err2string(rc)));
1246                 ret = NT_STATUS_UNSUCCESSFUL;
1247                 goto done;
1248         }
1249
1250         count = ldap_count_entries(ctx->smbldap_state->ldap_struct, result);
1251
1252         if (count == 0) {
1253                 DEBUG(10, ("NO SIDs found\n"));
1254         }
1255
1256         for (i = 0; i < count; i++) {
1257                 char *sidstr = NULL;
1258                 char *tmp = NULL;
1259                 enum id_type type;
1260                 struct id_map *map;
1261                 DOM_SID sid;
1262                 uint32_t id;
1263
1264                 if (i == 0) { /* first entry */
1265                         entry = ldap_first_entry(ctx->smbldap_state->ldap_struct,
1266                                                  result);
1267                 } else { /* following ones */
1268                         entry = ldap_next_entry(ctx->smbldap_state->ldap_struct,
1269                                                 entry);
1270                 }
1271                 if ( ! entry) {
1272                         DEBUG(2, ("ERROR: Unable to fetch ldap entries "
1273                                   "from results\n"));
1274                         break;
1275                 }
1276
1277                 /* first check if the SID is present */
1278                 sidstr = smbldap_talloc_single_attribute(
1279                                 ctx->smbldap_state->ldap_struct,
1280                                 entry, LDAP_ATTRIBUTE_SID, memctx);
1281                 if ( ! sidstr) { /* no sid ??, skip entry */
1282                         DEBUG(2, ("WARNING SID not found on entry\n"));
1283                         continue;
1284                 }
1285
1286                 if ( ! string_to_sid(&sid, sidstr)) {
1287                         DEBUG(2, ("ERROR: Invalid SID on entry\n"));
1288                         TALLOC_FREE(sidstr);
1289                         continue;
1290                 }
1291
1292                 map = find_map_by_sid(&ids[bidx], &sid);
1293                 if (!map) {
1294                         DEBUG(2, ("WARNING: couldn't find entry sid (%s) "
1295                                   "in ids", sidstr));
1296                         TALLOC_FREE(sidstr);
1297                         continue;
1298                 }
1299
1300                 /* now try to see if it is a uid, if not try with a gid
1301                  * (gid is more common, but in case both uidNumber and
1302                  * gidNumber are returned the SID is mapped to the uid
1303                  * not the gid) */
1304                 type = ID_TYPE_UID;
1305                 tmp = smbldap_talloc_single_attribute(
1306                                 ctx->smbldap_state->ldap_struct,
1307                                 entry, uidNumber, memctx);
1308                 if ( ! tmp) {
1309                         type = ID_TYPE_GID;
1310                         tmp = smbldap_talloc_single_attribute(
1311                                         ctx->smbldap_state->ldap_struct,
1312                                         entry, gidNumber, memctx);
1313                 }
1314                 if ( ! tmp) { /* no ids ?? */
1315                         DEBUG(5, ("no uidNumber, "
1316                                   "nor gidNumber attributes found\n"));
1317                         TALLOC_FREE(sidstr);
1318                         continue;
1319                 }
1320
1321                 id = strtoul(tmp, NULL, 10);
1322                 if ((id == 0) ||
1323                     (ctx->filter_low_id && (id < ctx->filter_low_id)) ||
1324                     (ctx->filter_high_id && (id > ctx->filter_high_id))) {
1325                         DEBUG(5, ("Requested id (%u) out of range (%u - %u). "
1326                                   "Filtered!\n", id,
1327                                   ctx->filter_low_id, ctx->filter_high_id));
1328                         TALLOC_FREE(sidstr);
1329                         TALLOC_FREE(tmp);
1330                         continue;
1331                 }
1332                 TALLOC_FREE(tmp);
1333
1334                 if (map->status == ID_MAPPED) {
1335                         DEBUG(1, ("WARNING: duplicate %s mapping in LDAP. "
1336                               "overwriting mapping %s -> %u with %s -> %u\n",
1337                               (type == ID_TYPE_UID) ? "UID" : "GID",
1338                               sidstr, map->xid.id, sidstr, id));
1339                 }
1340
1341                 TALLOC_FREE(sidstr);
1342
1343                 /* mapped */
1344                 map->xid.type = type;
1345                 map->xid.id = id;
1346                 map->status = ID_MAPPED;
1347
1348                 DEBUG(10, ("Mapped %s -> %lu (%d)\n", sid_string_dbg(map->sid),
1349                            (unsigned long)map->xid.id, map->xid.type));
1350         }
1351
1352         /* free the ldap results */
1353         if (result) {
1354                 ldap_msgfree(result);
1355                 result = NULL;
1356         }
1357
1358         if (multi && ids[idx]) { /* still some values to map */
1359                 goto again;
1360         }
1361
1362         ret = NT_STATUS_OK;
1363
1364         /* mark all unknwon/expired ones as unmapped */
1365         for (i = 0; ids[i]; i++) {
1366                 if (ids[i]->status != ID_MAPPED)
1367                         ids[i]->status = ID_UNMAPPED;
1368         }
1369
1370 done:
1371         talloc_free(memctx);
1372         return ret;
1373 }
1374
1375 /**********************************
1376  set a mapping.
1377 **********************************/
1378
1379 /* TODO: change this:  This function cannot be called to modify a mapping,
1380  * only set a new one */
1381
1382 static NTSTATUS idmap_ldap_set_mapping(struct idmap_domain *dom,
1383                                        const struct id_map *map)
1384 {
1385         NTSTATUS ret;
1386         TALLOC_CTX *memctx;
1387         struct idmap_ldap_context *ctx;
1388         LDAPMessage *entry = NULL;
1389         LDAPMod **mods = NULL;
1390         const char *type;
1391         char *id_str;
1392         char *sid;
1393         char *dn;
1394         int rc = -1;
1395
1396         /* Only do query if we are online */
1397         if (idmap_is_offline()) {
1398                 return NT_STATUS_FILE_IS_OFFLINE;
1399         }
1400
1401         ctx = talloc_get_type(dom->private_data, struct idmap_ldap_context);
1402
1403         switch(map->xid.type) {
1404         case ID_TYPE_UID:
1405                 type = get_attr_key2string(sidmap_attr_list,
1406                                            LDAP_ATTR_UIDNUMBER);
1407                 break;
1408
1409         case ID_TYPE_GID:
1410                 type = get_attr_key2string(sidmap_attr_list,
1411                                            LDAP_ATTR_GIDNUMBER);
1412                 break;
1413
1414         default:
1415                 return NT_STATUS_INVALID_PARAMETER;
1416         }
1417
1418         memctx = talloc_new(ctx);
1419         if ( ! memctx) {
1420                 DEBUG(0, ("Out of memory!\n"));
1421                 return NT_STATUS_NO_MEMORY;
1422         }
1423
1424         id_str = talloc_asprintf(memctx, "%lu", (unsigned long)map->xid.id);
1425         CHECK_ALLOC_DONE(id_str);
1426
1427         sid = talloc_strdup(memctx, sid_string_talloc(memctx, map->sid));
1428         CHECK_ALLOC_DONE(sid);
1429
1430         dn = talloc_asprintf(memctx, "%s=%s,%s",
1431                         get_attr_key2string(sidmap_attr_list, LDAP_ATTR_SID),
1432                         sid,
1433                         ctx->suffix);
1434         CHECK_ALLOC_DONE(dn);
1435
1436         smbldap_set_mod(&mods, LDAP_MOD_ADD,
1437                         "objectClass", LDAP_OBJ_IDMAP_ENTRY);
1438
1439         smbldap_make_mod(ctx->smbldap_state->ldap_struct,
1440                          entry, &mods, type, id_str);
1441
1442         smbldap_make_mod(ctx->smbldap_state->ldap_struct, entry, &mods,
1443                          get_attr_key2string(sidmap_attr_list, LDAP_ATTR_SID),
1444                          sid);
1445
1446         if ( ! mods) {
1447                 DEBUG(2, ("ERROR: No mods?\n"));
1448                 ret = NT_STATUS_UNSUCCESSFUL;
1449                 goto done;
1450         }
1451
1452         /* TODO: remove conflicting mappings! */
1453
1454         smbldap_set_mod(&mods, LDAP_MOD_ADD, "objectClass", LDAP_OBJ_SID_ENTRY);
1455
1456         DEBUG(10, ("Set DN %s (%s -> %s)\n", dn, sid, id_str));
1457
1458         rc = smbldap_add(ctx->smbldap_state, dn, mods);
1459         ldap_mods_free(mods, True);
1460
1461         if (rc != LDAP_SUCCESS) {
1462                 char *ld_error = NULL;
1463                 ldap_get_option(ctx->smbldap_state->ldap_struct,
1464                                 LDAP_OPT_ERROR_STRING, &ld_error);
1465                 DEBUG(0,("ldap_set_mapping_internals: Failed to add %s to %lu "
1466                          "mapping [%s]\n", sid,
1467                          (unsigned long)map->xid.id, type));
1468                 DEBUG(0, ("ldap_set_mapping_internals: Error was: %s (%s)\n",
1469                         ld_error ? ld_error : "(NULL)", ldap_err2string (rc)));
1470                 if (ld_error) {
1471                         ldap_memfree(ld_error);
1472                 }
1473                 ret = NT_STATUS_UNSUCCESSFUL;
1474                 goto done;
1475         }
1476
1477         DEBUG(10,("ldap_set_mapping: Successfully created mapping from %s to "
1478                   "%lu [%s]\n", sid, (unsigned long)map->xid.id, type));
1479
1480         ret = NT_STATUS_OK;
1481
1482 done:
1483         talloc_free(memctx);
1484         return ret;
1485 }
1486
1487 /**********************************
1488  Close the idmap ldap instance
1489 **********************************/
1490
1491 static NTSTATUS idmap_ldap_close(struct idmap_domain *dom)
1492 {
1493         struct idmap_ldap_context *ctx;
1494
1495         if (dom->private_data) {
1496                 ctx = talloc_get_type(dom->private_data,
1497                                       struct idmap_ldap_context);
1498
1499                 talloc_free(ctx);
1500                 dom->private_data = NULL;
1501         }
1502
1503         return NT_STATUS_OK;
1504 }
1505
1506 static struct idmap_methods idmap_ldap_methods = {
1507
1508         .init = idmap_ldap_db_init,
1509         .unixids_to_sids = idmap_ldap_unixids_to_sids,
1510         .sids_to_unixids = idmap_ldap_sids_to_unixids,
1511         .set_mapping = idmap_ldap_set_mapping,
1512         .close_fn = idmap_ldap_close
1513 };
1514
1515 static struct idmap_alloc_methods idmap_ldap_alloc_methods = {
1516
1517         .init = idmap_ldap_alloc_init,
1518         .allocate_id = idmap_ldap_allocate_id,
1519         .get_id_hwm = idmap_ldap_get_hwm,
1520         .set_id_hwm = idmap_ldap_set_hwm,
1521         .close_fn = idmap_ldap_alloc_close,
1522         /* .dump_data = TODO */
1523 };
1524
1525 static NTSTATUS idmap_alloc_ldap_init(void)
1526 {
1527         return smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "ldap",
1528                                         &idmap_ldap_alloc_methods);
1529 }
1530
1531 NTSTATUS idmap_ldap_init(void);
1532 NTSTATUS idmap_ldap_init(void)
1533 {
1534         NTSTATUS ret;
1535
1536         /* FIXME: bad hack to actually register also the alloc_ldap module
1537          * without changining configure.in */
1538         ret = idmap_alloc_ldap_init();
1539         if (! NT_STATUS_IS_OK(ret)) {
1540                 return ret;
1541         }
1542         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "ldap",
1543                                   &idmap_ldap_methods);
1544 }
1545