source/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 struct idmap_ldap_context {
  37         struct smbldap_state *smbldap_state;
  38         char *url;
  39         char *suffix;
  40         char *user_dn;
  41         uint32_t filter_low_id, filter_high_id;         /* Filter range */
  42         bool anon;
  43 };
  44
  45 struct idmap_ldap_alloc_context {
  46         struct smbldap_state *smbldap_state;
  47         char *url;
  48         char *suffix;
  49         char *user_dn;
  50         uid_t low_uid, high_uid;      /* Range of uids */
  51         gid_t low_gid, high_gid;      /* Range of gids */
  52
  53 };
  54
  55 #define CHECK_ALLOC_DONE(mem) do { \
  56         if (!mem) { \
  57                 DEBUG(0, ("Out of memory!\n")); \
  58                 ret = NT_STATUS_NO_MEMORY; \
  59                 goto done; \
  60         } } while (0)
  61
  62 /**********************************************************************
  63  IDMAP ALLOC TDB BACKEND
  64 **********************************************************************/
  65
  66 static struct idmap_ldap_alloc_context *idmap_alloc_ldap;
  67
  68 /*********************************************************************
  69  ********************************************************************/
  70
  71 static NTSTATUS get_credentials( TALLOC_CTX *mem_ctx,
  72                                  struct smbldap_state *ldap_state,
  73                                  const char *config_option,
  74                                  struct idmap_domain *dom,
  75                                  char **dn )
  76 {
  77         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
  78         char *secret = NULL;
  79         const char *tmp = NULL;
  80         char *user_dn = NULL;
  81         bool anon = False;
  82
  83         /* assume anonymous if we don't have a specified user */
  84
  85         tmp = lp_parm_const_string(-1, config_option, "ldap_user_dn", NULL);
  86
  87         if ( tmp ) {
  88                 if (!dom) {
  89                         /* only the alloc backend can pass in a NULL dom */
  90                         secret = idmap_fetch_secret("ldap", True,
  91                                                     NULL, tmp);
  92                 } else {
  93                         secret = idmap_fetch_secret("ldap", False,
  94                                                     dom->name, tmp);
  95                 }
  96
  97                 if (!secret) {
  98                         DEBUG(0, ("get_credentials: Unable to fetch "
  99                                   "auth credentials for %s in %s\n",
 100                                   tmp, (dom==NULL)?"ALLOC":dom->name));
 101                         ret = NT_STATUS_ACCESS_DENIED;
 102                         goto done;
 103                 }
 104                 *dn = talloc_strdup(mem_ctx, tmp);
 105                 CHECK_ALLOC_DONE(*dn);
 106         } else {
 107                 if (!fetch_ldap_pw(&user_dn, &secret)) {
 108                         DEBUG(2, ("get_credentials: Failed to lookup ldap "
 109                                   "bind creds. Using anonymous connection.\n"));
 110                         anon = True;
 111                 } else {
 112                         *dn = talloc_strdup(mem_ctx, user_dn);
 113                         SAFE_FREE( user_dn );
 114                         CHECK_ALLOC_DONE(*dn);
 115                 }
 116         }
 117
 118         smbldap_set_creds(ldap_state, anon, *dn, secret);
 119         ret = NT_STATUS_OK;
 120
 121 done:
 122         SAFE_FREE(secret);
 123
 124         return ret;
 125 }
 126
 127
 128 /**********************************************************************
 129  Verify the sambaUnixIdPool entry in the directory.
 130 **********************************************************************/
 131
 132 static NTSTATUS verify_idpool(void)
 133 {
 134         NTSTATUS ret;
 135         TALLOC_CTX *ctx;
 136         LDAPMessage *result = NULL;
 137         LDAPMod **mods = NULL;
 138         const char **attr_list;
 139         char *filter;
 140         int count;
 141         int rc;
 142
 143         if ( ! idmap_alloc_ldap) {
 144                 return NT_STATUS_UNSUCCESSFUL;
 145         }
 146
 147         ctx = talloc_new(idmap_alloc_ldap);
 148         if ( ! ctx) {
 149                 DEBUG(0, ("Out of memory!\n"));
 150                 return NT_STATUS_NO_MEMORY;
 151         }
 152
 153         filter = talloc_asprintf(ctx, "(objectclass=%s)", LDAP_OBJ_IDPOOL);
 154         CHECK_ALLOC_DONE(filter);
 155
 156         attr_list = get_attr_list(ctx, idpool_attr_list);
 157         CHECK_ALLOC_DONE(attr_list);
 158
 159         rc = smbldap_search(idmap_alloc_ldap->smbldap_state,
 160                                 idmap_alloc_ldap->suffix,
 161                                 LDAP_SCOPE_SUBTREE,
 162                                 filter,
 163                                 attr_list,
 164                                 0,
 165                                 &result);
 166
 167         if (rc != LDAP_SUCCESS) {
 168                 DEBUG(1, ("Unable to verify the idpool, "
 169                           "cannot continue initialization!\n"));
 170                 return NT_STATUS_UNSUCCESSFUL;
 171         }
 172
 173         count = ldap_count_entries(idmap_alloc_ldap->smbldap_state->ldap_struct,
 174                                    result);
 175
 176         ldap_msgfree(result);
 177
 178         if ( count > 1 ) {
 179                 DEBUG(0,("Multiple entries returned from %s (base == %s)\n",
 180                         filter, idmap_alloc_ldap->suffix));
 181                 ret = NT_STATUS_UNSUCCESSFUL;
 182                 goto done;
 183         }
 184         else if (count == 0) {
 185                 char *uid_str, *gid_str;
 186
 187                 uid_str = talloc_asprintf(ctx, "%lu",
 188                                 (unsigned long)idmap_alloc_ldap->low_uid);
 189                 gid_str = talloc_asprintf(ctx, "%lu",
 190                                 (unsigned long)idmap_alloc_ldap->low_gid);
 191
 192                 smbldap_set_mod(&mods, LDAP_MOD_ADD,
 193                                 "objectClass", LDAP_OBJ_IDPOOL);
 194                 smbldap_set_mod(&mods, LDAP_MOD_ADD,
 195                                 get_attr_key2string(idpool_attr_list,
 196                                                     LDAP_ATTR_UIDNUMBER),
 197                                 uid_str);
 198                 smbldap_set_mod(&mods, LDAP_MOD_ADD,
 199                                 get_attr_key2string(idpool_attr_list,
 200                                                     LDAP_ATTR_GIDNUMBER),
 201                                 gid_str);
 202                 if (mods) {
 203                         rc = smbldap_modify(idmap_alloc_ldap->smbldap_state,
 204                                                 idmap_alloc_ldap->suffix,
 205                                                 mods);
 206                         ldap_mods_free(mods, True);
 207                 } else {
 208                         ret = NT_STATUS_UNSUCCESSFUL;
 209                         goto done;
 210                 }
 211         }
 212
 213         ret = (rc == LDAP_SUCCESS)?NT_STATUS_OK:NT_STATUS_UNSUCCESSFUL;
 214 done:
 215         talloc_free(ctx);
 216         return ret;
 217 }
 218
 219 /*****************************************************************************
 220  Initialise idmap database.
 221 *****************************************************************************/
 222
 223 static NTSTATUS idmap_ldap_alloc_init(const char *params)
 224 {
 225         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 226         const char *range;
 227         const char *tmp;
 228         uid_t low_uid = 0;
 229         uid_t high_uid = 0;
 230         gid_t low_gid = 0;
 231         gid_t high_gid = 0;
 232
 233         /* Only do init if we are online */
 234         if (idmap_is_offline()) {
 235                 return NT_STATUS_FILE_IS_OFFLINE;
 236         }
 237
 238         idmap_alloc_ldap = TALLOC_ZERO_P(NULL, struct idmap_ldap_alloc_context);
 239         CHECK_ALLOC_DONE( idmap_alloc_ldap );
 240
 241         /* load ranges */
 242
 243         idmap_alloc_ldap->low_uid = 0;
 244         idmap_alloc_ldap->high_uid = 0;
 245         idmap_alloc_ldap->low_gid = 0;
 246         idmap_alloc_ldap->high_gid = 0;
 247
 248         range = lp_parm_const_string(-1, "idmap alloc config", "range", NULL);
 249         if (range && range[0]) {
 250                 unsigned low_id, high_id;
 251
 252                 if (sscanf(range, "%u - %u", &low_id, &high_id) == 2) {
 253                         if (low_id < high_id) {
 254                                 idmap_alloc_ldap->low_gid = low_id;
 255                                 idmap_alloc_ldap->low_uid = low_id;
 256                                 idmap_alloc_ldap->high_gid = high_id;
 257                                 idmap_alloc_ldap->high_uid = high_id;
 258                         } else {
 259                                 DEBUG(1, ("ERROR: invalid idmap alloc range "
 260                                           "[%s]", range));
 261                         }
 262                 } else {
 263                         DEBUG(1, ("ERROR: invalid syntax for idmap alloc "
 264                                   "config:range [%s]", range));
 265                 }
 266         }
 267
 268         if (lp_idmap_uid(&low_uid, &high_uid)) {
 269                 idmap_alloc_ldap->low_uid = low_uid;
 270                 idmap_alloc_ldap->high_uid = high_uid;
 271         }
 272
 273         if (lp_idmap_gid(&low_gid, &high_gid)) {
 274                 idmap_alloc_ldap->low_gid = low_gid;
 275                 idmap_alloc_ldap->high_gid= high_gid;
 276         }
 277
 278         if (idmap_alloc_ldap->high_uid <= idmap_alloc_ldap->low_uid) {
 279                 DEBUG(1, ("idmap uid range missing or 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 missing or 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 {
 765         NTSTATUS ret;
 766         struct idmap_ldap_context *ctx = NULL;
 767         char *config_option = NULL;
 768         const char *range = 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         config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 783         if ( ! config_option) {
 784                 DEBUG(0, ("Out of memory!\n"));
 785                 ret = NT_STATUS_NO_MEMORY;
 786                 goto done;
 787         }
 788
 789         /* load ranges */
 790         range = lp_parm_const_string(-1, config_option, "range", NULL);
 791         if (range && range[0]) {
 792                 if ((sscanf(range, "%u - %u", &ctx->filter_low_id,
 793                                                 &ctx->filter_high_id) != 2) ||
 794                     (ctx->filter_low_id > ctx->filter_high_id)) {
 795                         DEBUG(1, ("ERROR: invalid filter range [%s]", range));
 796                         ctx->filter_low_id = 0;
 797                         ctx->filter_high_id = 0;
 798                 }
 799         }
 800
 801         if (dom->params && *(dom->params)) {
 802                 /* assume location is the only parameter */
 803                 ctx->url = talloc_strdup(ctx, dom->params);
 804         } else {
 805                 tmp = lp_parm_const_string(-1, config_option, "ldap_url", NULL);
 806
 807                 if ( ! tmp) {
 808                         DEBUG(1, ("ERROR: missing idmap ldap url\n"));
 809                         ret = NT_STATUS_UNSUCCESSFUL;
 810                         goto done;
 811                 }
 812
 813                 ctx->url = talloc_strdup(ctx, tmp);
 814         }
 815         CHECK_ALLOC_DONE(ctx->url);
 816
 817         tmp = lp_parm_const_string(-1, config_option, "ldap_base_dn", NULL);
 818         if ( ! tmp || ! *tmp) {
 819                 tmp = lp_ldap_idmap_suffix();
 820                 if ( ! tmp) {
 821                         DEBUG(1, ("ERROR: missing idmap ldap suffix\n"));
 822                         ret = NT_STATUS_UNSUCCESSFUL;
 823                         goto done;
 824                 }
 825         }
 826
 827         ctx->suffix = talloc_strdup(ctx, tmp);
 828         CHECK_ALLOC_DONE(ctx->suffix);
 829
 830         ret = smbldap_init(ctx, winbind_event_context(), ctx->url,
 831                            &ctx->smbldap_state);
 832         if (!NT_STATUS_IS_OK(ret)) {
 833                 DEBUG(1, ("ERROR: smbldap_init (%s) failed!\n", ctx->url));
 834                 goto done;
 835         }
 836
 837         ret = get_credentials( ctx, ctx->smbldap_state, config_option,
 838                                dom, &ctx->user_dn );
 839         if ( !NT_STATUS_IS_OK(ret) ) {
 840                 DEBUG(1,("idmap_ldap_db_init: Failed to get connection "
 841                          "credentials (%s)\n", nt_errstr(ret)));
 842                 goto done;
 843         }
 844
 845         /* set the destructor on the context, so that resource are properly
 846            freed if the contexts is released */
 847
 848         talloc_set_destructor(ctx, idmap_ldap_close_destructor);
 849
 850         dom->private_data = ctx;
 851         dom->initialized = True;
 852
 853         talloc_free(config_option);
 854         return NT_STATUS_OK;
 855
 856 /*failed */
 857 done:
 858         talloc_free(ctx);
 859         return ret;
 860 }
 861
 862 /* max number of ids requested per batch query */
 863 #define IDMAP_LDAP_MAX_IDS 30
 864
 865 /**********************************
 866  lookup a set of unix ids.
 867 **********************************/
 868
 869 /* this function searches up to IDMAP_LDAP_MAX_IDS entries
 870  * in maps for a match */
 871 static struct id_map *find_map_by_id(struct id_map **maps,
 872                                      enum id_type type,
 873                                      uint32_t id)
 874 {
 875         int i;
 876
 877         for (i = 0; i < IDMAP_LDAP_MAX_IDS; i++) {
 878                 if (maps[i] == NULL) { /* end of the run */
 879                         return NULL;
 880                 }
 881                 if ((maps[i]->xid.type == type) && (maps[i]->xid.id == id)) {
 882                         return maps[i];
 883                 }
 884         }
 885
 886         return NULL;
 887 }
 888
 889 static NTSTATUS idmap_ldap_unixids_to_sids(struct idmap_domain *dom,
 890                                            struct id_map **ids)
 891 {
 892         NTSTATUS ret;
 893         TALLOC_CTX *memctx;
 894         struct idmap_ldap_context *ctx;
 895         LDAPMessage *result = NULL;
 896         const char *uidNumber;
 897         const char *gidNumber;
 898         const char **attr_list;
 899         char *filter = NULL;
 900         bool multi = False;
 901         int idx = 0;
 902         int bidx = 0;
 903         int count;
 904         int rc;
 905         int i;
 906
 907         /* Only do query if we are online */
 908         if (idmap_is_offline()) {
 909                 return NT_STATUS_FILE_IS_OFFLINE;
 910         }
 911
 912         /* Initilization my have been deferred because we were offline */
 913         if ( ! dom->initialized) {
 914                 ret = idmap_ldap_db_init(dom);
 915                 if ( ! NT_STATUS_IS_OK(ret)) {
 916                         return ret;
 917                 }
 918         }
 919
 920         ctx = talloc_get_type(dom->private_data, struct idmap_ldap_context);
 921
 922         memctx = talloc_new(ctx);
 923         if ( ! memctx) {
 924                 DEBUG(0, ("Out of memory!\n"));
 925                 return NT_STATUS_NO_MEMORY;
 926         }
 927
 928         uidNumber = get_attr_key2string(idpool_attr_list, LDAP_ATTR_UIDNUMBER);
 929         gidNumber = get_attr_key2string(idpool_attr_list, LDAP_ATTR_GIDNUMBER);
 930
 931         attr_list = get_attr_list(memctx, sidmap_attr_list);
 932
 933         if ( ! ids[1]) {
 934                 /* if we are requested just one mapping use the simple filter */
 935
 936                 filter = talloc_asprintf(memctx, "(&(objectClass=%s)(%s=%lu))",
 937                                 LDAP_OBJ_IDMAP_ENTRY,
 938                                 (ids[0]->xid.type==ID_TYPE_UID)?uidNumber:gidNumber,
 939                                 (unsigned long)ids[0]->xid.id);
 940                 CHECK_ALLOC_DONE(filter);
 941                 DEBUG(10, ("Filter: [%s]\n", filter));
 942         } else {
 943                 /* multiple mappings */
 944                 multi = True;
 945         }
 946
 947 again:
 948         if (multi) {
 949
 950                 talloc_free(filter);
 951                 filter = talloc_asprintf(memctx,
 952                                          "(&(objectClass=%s)(|",
 953                                          LDAP_OBJ_IDMAP_ENTRY);
 954                 CHECK_ALLOC_DONE(filter);
 955
 956                 bidx = idx;
 957                 for (i = 0; (i < IDMAP_LDAP_MAX_IDS) && ids[idx]; i++, idx++) {
 958                         filter = talloc_asprintf_append_buffer(filter, "(%s=%lu)",
 959                                         (ids[idx]->xid.type==ID_TYPE_UID)?uidNumber:gidNumber,
 960                                         (unsigned long)ids[idx]->xid.id);
 961                         CHECK_ALLOC_DONE(filter);
 962                 }
 963                 filter = talloc_asprintf_append_buffer(filter, "))");
 964                 CHECK_ALLOC_DONE(filter);
 965                 DEBUG(10, ("Filter: [%s]\n", filter));
 966         } else {
 967                 bidx = 0;
 968                 idx = 1;
 969         }
 970
 971         rc = smbldap_search(ctx->smbldap_state, ctx->suffix, LDAP_SCOPE_SUBTREE,
 972                 filter, attr_list, 0, &result);
 973
 974         if (rc != LDAP_SUCCESS) {
 975                 DEBUG(3,("Failure looking up ids (%s)\n", ldap_err2string(rc)));
 976                 ret = NT_STATUS_UNSUCCESSFUL;
 977                 goto done;
 978         }
 979
 980         count = ldap_count_entries(ctx->smbldap_state->ldap_struct, result);
 981
 982         if (count == 0) {
 983                 DEBUG(10, ("NO SIDs found\n"));
 984         }
 985
 986         for (i = 0; i < count; i++) {
 987                 LDAPMessage *entry = NULL;
 988                 char *sidstr = NULL;
 989                 char *tmp = NULL;
 990                 enum id_type type;
 991                 struct id_map *map;
 992                 uint32_t id;
 993
 994                 if (i == 0) { /* first entry */
 995                         entry = ldap_first_entry(ctx->smbldap_state->ldap_struct,
 996                                                  result);
 997                 } else { /* following ones */
 998                         entry = ldap_next_entry(ctx->smbldap_state->ldap_struct,
 999                                                 entry);
1000                 }
1001                 if ( ! entry) {
1002                         DEBUG(2, ("ERROR: Unable to fetch ldap entries "
1003                                   "from results\n"));
1004                         break;
1005                 }
1006
1007                 /* first check if the SID is present */
1008                 sidstr = smbldap_talloc_single_attribute(
1009                                 ctx->smbldap_state->ldap_struct,
1010                                 entry, LDAP_ATTRIBUTE_SID, memctx);
1011                 if ( ! sidstr) { /* no sid, skip entry */
1012                         DEBUG(2, ("WARNING SID not found on entry\n"));
1013                         continue;
1014                 }
1015
1016                 /* now try to see if it is a uid, if not try with a gid
1017                  * (gid is more common, but in case both uidNumber and
1018                  * gidNumber are returned the SID is mapped to the uid
1019                  *not the gid) */
1020                 type = ID_TYPE_UID;
1021                 tmp = smbldap_talloc_single_attribute(
1022                                 ctx->smbldap_state->ldap_struct,
1023                                 entry, uidNumber, memctx);
1024                 if ( ! tmp) {
1025                         type = ID_TYPE_GID;
1026                         tmp = smbldap_talloc_single_attribute(
1027                                         ctx->smbldap_state->ldap_struct,
1028                                         entry, gidNumber, memctx);
1029                 }
1030                 if ( ! tmp) { /* wow very strange entry, how did it match ? */
1031                         DEBUG(5, ("Unprobable match on (%s), no uidNumber, "
1032                                   "nor gidNumber returned\n", sidstr));
1033                         TALLOC_FREE(sidstr);
1034                         continue;
1035                 }
1036
1037                 id = strtoul(tmp, NULL, 10);
1038                 if ((id == 0) ||
1039                     (ctx->filter_low_id && (id < ctx->filter_low_id)) ||
1040                     (ctx->filter_high_id && (id > ctx->filter_high_id))) {
1041                         DEBUG(5, ("Requested id (%u) out of range (%u - %u). "
1042                                   "Filtered!\n", id,
1043                                   ctx->filter_low_id, ctx->filter_high_id));
1044                         TALLOC_FREE(sidstr);
1045                         TALLOC_FREE(tmp);
1046                         continue;
1047                 }
1048                 TALLOC_FREE(tmp);
1049
1050                 map = find_map_by_id(&ids[bidx], type, id);
1051                 if (!map) {
1052                         DEBUG(2, ("WARNING: couldn't match sid (%s) "
1053                                   "with requested ids\n", sidstr));
1054                         TALLOC_FREE(sidstr);
1055                         continue;
1056                 }
1057
1058                 if ( ! string_to_sid(map->sid, sidstr)) {
1059                         DEBUG(2, ("ERROR: Invalid SID on entry\n"));
1060                         TALLOC_FREE(sidstr);
1061                         continue;
1062                 }
1063                 TALLOC_FREE(sidstr);
1064
1065                 /* mapped */
1066                 map->status = ID_MAPPED;
1067
1068                 DEBUG(10, ("Mapped %s -> %lu (%d)\n", sid_string_dbg(map->sid),
1069                            (unsigned long)map->xid.id, map->xid.type));
1070         }
1071
1072         /* free the ldap results */
1073         if (result) {
1074                 ldap_msgfree(result);
1075                 result = NULL;
1076         }
1077
1078         if (multi && ids[idx]) { /* still some values to map */
1079                 goto again;
1080         }
1081
1082         ret = NT_STATUS_OK;
1083
1084         /* mark all unknwon/expired ones as unmapped */
1085         for (i = 0; ids[i]; i++) {
1086                 if (ids[i]->status != ID_MAPPED)
1087                         ids[i]->status = ID_UNMAPPED;
1088         }
1089
1090 done:
1091         talloc_free(memctx);
1092         return ret;
1093 }
1094
1095 /**********************************
1096  lookup a set of sids.
1097 **********************************/
1098
1099 /* this function searches up to IDMAP_LDAP_MAX_IDS entries
1100  * in maps for a match */
1101 static struct id_map *find_map_by_sid(struct id_map **maps, DOM_SID *sid)
1102 {
1103         int i;
1104
1105         for (i = 0; i < IDMAP_LDAP_MAX_IDS; i++) {
1106                 if (maps[i] == NULL) { /* end of the run */
1107                         return NULL;
1108                 }
1109                 if (sid_equal(maps[i]->sid, sid)) {
1110                         return maps[i];
1111                 }
1112         }
1113
1114         return NULL;
1115 }
1116
1117 static NTSTATUS idmap_ldap_sids_to_unixids(struct idmap_domain *dom,
1118                                            struct id_map **ids)
1119 {
1120         LDAPMessage *entry = NULL;
1121         NTSTATUS ret;
1122         TALLOC_CTX *memctx;
1123         struct idmap_ldap_context *ctx;
1124         LDAPMessage *result = NULL;
1125         const char *uidNumber;
1126         const char *gidNumber;
1127         const char **attr_list;
1128         char *filter = NULL;
1129         bool multi = False;
1130         int idx = 0;
1131         int bidx = 0;
1132         int count;
1133         int rc;
1134         int i;
1135
1136         /* Only do query if we are online */
1137         if (idmap_is_offline()) {
1138                 return NT_STATUS_FILE_IS_OFFLINE;
1139         }
1140
1141         /* Initilization my have been deferred because we were offline */
1142         if ( ! dom->initialized) {
1143                 ret = idmap_ldap_db_init(dom);
1144                 if ( ! NT_STATUS_IS_OK(ret)) {
1145                         return ret;
1146                 }
1147         }
1148
1149         ctx = talloc_get_type(dom->private_data, struct idmap_ldap_context);
1150
1151         memctx = talloc_new(ctx);
1152         if ( ! memctx) {
1153                 DEBUG(0, ("Out of memory!\n"));
1154                 return NT_STATUS_NO_MEMORY;
1155         }
1156
1157         uidNumber = get_attr_key2string(idpool_attr_list, LDAP_ATTR_UIDNUMBER);
1158         gidNumber = get_attr_key2string(idpool_attr_list, LDAP_ATTR_GIDNUMBER);
1159
1160         attr_list = get_attr_list(memctx, sidmap_attr_list);
1161
1162         if ( ! ids[1]) {
1163                 /* if we are requested just one mapping use the simple filter */
1164
1165                 filter = talloc_asprintf(memctx, "(&(objectClass=%s)(%s=%s))",
1166                                 LDAP_OBJ_IDMAP_ENTRY,
1167                                 LDAP_ATTRIBUTE_SID,
1168                                 sid_string_talloc(memctx, ids[0]->sid));
1169                 CHECK_ALLOC_DONE(filter);
1170                 DEBUG(10, ("Filter: [%s]\n", filter));
1171         } else {
1172                 /* multiple mappings */
1173                 multi = True;
1174         }
1175
1176 again:
1177         if (multi) {
1178
1179                 TALLOC_FREE(filter);
1180                 filter = talloc_asprintf(memctx,
1181                                          "(&(objectClass=%s)(|",
1182                                          LDAP_OBJ_IDMAP_ENTRY);
1183                 CHECK_ALLOC_DONE(filter);
1184
1185                 bidx = idx;
1186                 for (i = 0; (i < IDMAP_LDAP_MAX_IDS) && ids[idx]; i++, idx++) {
1187                         filter = talloc_asprintf_append_buffer(filter, "(%s=%s)",
1188                                         LDAP_ATTRIBUTE_SID,
1189                                         sid_string_talloc(memctx,
1190                                                           ids[idx]->sid));
1191                         CHECK_ALLOC_DONE(filter);
1192                 }
1193                 filter = talloc_asprintf_append_buffer(filter, "))");
1194                 CHECK_ALLOC_DONE(filter);
1195                 DEBUG(10, ("Filter: [%s]", filter));
1196         } else {
1197                 bidx = 0;
1198                 idx = 1;
1199         }
1200
1201         rc = smbldap_search(ctx->smbldap_state, ctx->suffix, LDAP_SCOPE_SUBTREE,
1202                 filter, attr_list, 0, &result);
1203
1204         if (rc != LDAP_SUCCESS) {
1205                 DEBUG(3,("Failure looking up sids (%s)\n",
1206                          ldap_err2string(rc)));
1207                 ret = NT_STATUS_UNSUCCESSFUL;
1208                 goto done;
1209         }
1210
1211         count = ldap_count_entries(ctx->smbldap_state->ldap_struct, result);
1212
1213         if (count == 0) {
1214                 DEBUG(10, ("NO SIDs found\n"));
1215         }
1216
1217         for (i = 0; i < count; i++) {
1218                 char *sidstr = NULL;
1219                 char *tmp = NULL;
1220                 enum id_type type;
1221                 struct id_map *map;
1222                 DOM_SID sid;
1223                 uint32_t id;
1224
1225                 if (i == 0) { /* first entry */
1226                         entry = ldap_first_entry(ctx->smbldap_state->ldap_struct,
1227                                                  result);
1228                 } else { /* following ones */
1229                         entry = ldap_next_entry(ctx->smbldap_state->ldap_struct,
1230                                                 entry);
1231                 }
1232                 if ( ! entry) {
1233                         DEBUG(2, ("ERROR: Unable to fetch ldap entries "
1234                                   "from results\n"));
1235                         break;
1236                 }
1237
1238                 /* first check if the SID is present */
1239                 sidstr = smbldap_talloc_single_attribute(
1240                                 ctx->smbldap_state->ldap_struct,
1241                                 entry, LDAP_ATTRIBUTE_SID, memctx);
1242                 if ( ! sidstr) { /* no sid ??, skip entry */
1243                         DEBUG(2, ("WARNING SID not found on entry\n"));
1244                         continue;
1245                 }
1246
1247                 if ( ! string_to_sid(&sid, sidstr)) {
1248                         DEBUG(2, ("ERROR: Invalid SID on entry\n"));
1249                         TALLOC_FREE(sidstr);
1250                         continue;
1251                 }
1252
1253                 map = find_map_by_sid(&ids[bidx], &sid);
1254                 if (!map) {
1255                         DEBUG(2, ("WARNING: couldn't find entry sid (%s) "
1256                                   "in ids", sidstr));
1257                         TALLOC_FREE(sidstr);
1258                         continue;
1259                 }
1260
1261                 TALLOC_FREE(sidstr);
1262
1263                 /* now try to see if it is a uid, if not try with a gid
1264                  * (gid is more common, but in case both uidNumber and
1265                  * gidNumber are returned the SID is mapped to the uid
1266                  * not the gid) */
1267                 type = ID_TYPE_UID;
1268                 tmp = smbldap_talloc_single_attribute(
1269                                 ctx->smbldap_state->ldap_struct,
1270                                 entry, uidNumber, memctx);
1271                 if ( ! tmp) {
1272                         type = ID_TYPE_GID;
1273                         tmp = smbldap_talloc_single_attribute(
1274                                         ctx->smbldap_state->ldap_struct,
1275                                         entry, gidNumber, memctx);
1276                 }
1277                 if ( ! tmp) { /* no ids ?? */
1278                         DEBUG(5, ("no uidNumber, "
1279                                   "nor gidNumber attributes found\n"));
1280                         continue;
1281                 }
1282
1283                 id = strtoul(tmp, NULL, 10);
1284                 if ((id == 0) ||
1285                     (ctx->filter_low_id && (id < ctx->filter_low_id)) ||
1286                     (ctx->filter_high_id && (id > ctx->filter_high_id))) {
1287                         DEBUG(5, ("Requested id (%u) out of range (%u - %u). "
1288                                   "Filtered!\n", id,
1289                                   ctx->filter_low_id, ctx->filter_high_id));
1290                         TALLOC_FREE(tmp);
1291                         continue;
1292                 }
1293                 TALLOC_FREE(tmp);
1294
1295                 /* mapped */
1296                 map->xid.type = type;
1297                 map->xid.id = id;
1298                 map->status = ID_MAPPED;
1299
1300                 DEBUG(10, ("Mapped %s -> %lu (%d)\n", sid_string_dbg(map->sid),
1301                            (unsigned long)map->xid.id, map->xid.type));
1302         }
1303
1304         /* free the ldap results */
1305         if (result) {
1306                 ldap_msgfree(result);
1307                 result = NULL;
1308         }
1309
1310         if (multi && ids[idx]) { /* still some values to map */
1311                 goto again;
1312         }
1313
1314         ret = NT_STATUS_OK;
1315
1316         /* mark all unknwon/expired ones as unmapped */
1317         for (i = 0; ids[i]; i++) {
1318                 if (ids[i]->status != ID_MAPPED)
1319                         ids[i]->status = ID_UNMAPPED;
1320         }
1321
1322 done:
1323         talloc_free(memctx);
1324         return ret;
1325 }
1326
1327 /**********************************
1328  set a mapping.
1329 **********************************/
1330
1331 /* TODO: change this:  This function cannot be called to modify a mapping,
1332  * only set a new one */
1333
1334 static NTSTATUS idmap_ldap_set_mapping(struct idmap_domain *dom,
1335                                        const struct id_map *map)
1336 {
1337         NTSTATUS ret;
1338         TALLOC_CTX *memctx;
1339         struct idmap_ldap_context *ctx;
1340         LDAPMessage *entry = NULL;
1341         LDAPMod **mods = NULL;
1342         const char *type;
1343         char *id_str;
1344         char *sid;
1345         char *dn;
1346         int rc = -1;
1347
1348         /* Only do query if we are online */
1349         if (idmap_is_offline()) {
1350                 return NT_STATUS_FILE_IS_OFFLINE;
1351         }
1352
1353         /* Initilization my have been deferred because we were offline */
1354         if ( ! dom->initialized) {
1355                 ret = idmap_ldap_db_init(dom);
1356                 if ( ! NT_STATUS_IS_OK(ret)) {
1357                         return ret;
1358                 }
1359         }
1360
1361         ctx = talloc_get_type(dom->private_data, struct idmap_ldap_context);
1362
1363         switch(map->xid.type) {
1364         case ID_TYPE_UID:
1365                 type = get_attr_key2string(sidmap_attr_list,
1366                                            LDAP_ATTR_UIDNUMBER);
1367                 break;
1368
1369         case ID_TYPE_GID:
1370                 type = get_attr_key2string(sidmap_attr_list,
1371                                            LDAP_ATTR_GIDNUMBER);
1372                 break;
1373
1374         default:
1375                 return NT_STATUS_INVALID_PARAMETER;
1376         }
1377
1378         memctx = talloc_new(ctx);
1379         if ( ! memctx) {
1380                 DEBUG(0, ("Out of memory!\n"));
1381                 return NT_STATUS_NO_MEMORY;
1382         }
1383
1384         id_str = talloc_asprintf(memctx, "%lu", (unsigned long)map->xid.id);
1385         CHECK_ALLOC_DONE(id_str);
1386
1387         sid = talloc_strdup(memctx, sid_string_talloc(memctx, map->sid));
1388         CHECK_ALLOC_DONE(sid);
1389
1390         dn = talloc_asprintf(memctx, "%s=%s,%s",
1391                         get_attr_key2string(sidmap_attr_list, LDAP_ATTR_SID),
1392                         sid,
1393                         ctx->suffix);
1394         CHECK_ALLOC_DONE(dn);
1395
1396         smbldap_set_mod(&mods, LDAP_MOD_ADD,
1397                         "objectClass", LDAP_OBJ_IDMAP_ENTRY);
1398
1399         smbldap_make_mod(ctx->smbldap_state->ldap_struct,
1400                          entry, &mods, type, id_str);
1401
1402         smbldap_make_mod(ctx->smbldap_state->ldap_struct, entry, &mods,
1403                          get_attr_key2string(sidmap_attr_list, LDAP_ATTR_SID),
1404                          sid);
1405
1406         if ( ! mods) {
1407                 DEBUG(2, ("ERROR: No mods?\n"));
1408                 ret = NT_STATUS_UNSUCCESSFUL;
1409                 goto done;
1410         }
1411
1412         /* TODO: remove conflicting mappings! */
1413
1414         smbldap_set_mod(&mods, LDAP_MOD_ADD, "objectClass", LDAP_OBJ_SID_ENTRY);
1415
1416         DEBUG(10, ("Set DN %s (%s -> %s)\n", dn, sid, id_str));
1417
1418         rc = smbldap_add(ctx->smbldap_state, dn, mods);
1419         ldap_mods_free(mods, True);
1420
1421         if (rc != LDAP_SUCCESS) {
1422                 char *ld_error = NULL;
1423                 ldap_get_option(ctx->smbldap_state->ldap_struct,
1424                                 LDAP_OPT_ERROR_STRING, &ld_error);
1425                 DEBUG(0,("ldap_set_mapping_internals: Failed to add %s to %lu "
1426                          "mapping [%s]\n", sid,
1427                          (unsigned long)map->xid.id, type));
1428                 DEBUG(0, ("ldap_set_mapping_internals: Error was: %s (%s)\n",
1429                         ld_error ? ld_error : "(NULL)", ldap_err2string (rc)));
1430                 if (ld_error) {
1431                         ldap_memfree(ld_error);
1432                 }
1433                 ret = NT_STATUS_UNSUCCESSFUL;
1434                 goto done;
1435         }
1436
1437         DEBUG(10,("ldap_set_mapping: Successfully created mapping from %s to "
1438                   "%lu [%s]\n", sid, (unsigned long)map->xid.id, type));
1439
1440         ret = NT_STATUS_OK;
1441
1442 done:
1443         talloc_free(memctx);
1444         return ret;
1445 }
1446
1447 /**********************************
1448  Close the idmap ldap instance
1449 **********************************/
1450
1451 static NTSTATUS idmap_ldap_close(struct idmap_domain *dom)
1452 {
1453         struct idmap_ldap_context *ctx;
1454
1455         if (dom->private_data) {
1456                 ctx = talloc_get_type(dom->private_data,
1457                                       struct idmap_ldap_context);
1458
1459                 talloc_free(ctx);
1460                 dom->private_data = NULL;
1461         }
1462
1463         return NT_STATUS_OK;
1464 }
1465
1466 static struct idmap_methods idmap_ldap_methods = {
1467
1468         .init = idmap_ldap_db_init,
1469         .unixids_to_sids = idmap_ldap_unixids_to_sids,
1470         .sids_to_unixids = idmap_ldap_sids_to_unixids,
1471         .set_mapping = idmap_ldap_set_mapping,
1472         .close_fn = idmap_ldap_close
1473 };
1474
1475 static struct idmap_alloc_methods idmap_ldap_alloc_methods = {
1476
1477         .init = idmap_ldap_alloc_init,
1478         .allocate_id = idmap_ldap_allocate_id,
1479         .get_id_hwm = idmap_ldap_get_hwm,
1480         .set_id_hwm = idmap_ldap_set_hwm,
1481         .close_fn = idmap_ldap_alloc_close,
1482         /* .dump_data = TODO */
1483 };
1484
1485 NTSTATUS idmap_alloc_ldap_init(void)
1486 {
1487         return smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "ldap",
1488                                         &idmap_ldap_alloc_methods);
1489 }
1490
1491 NTSTATUS idmap_ldap_init(void)
1492 {
1493         NTSTATUS ret;
1494
1495         /* FIXME: bad hack to actually register also the alloc_ldap module
1496          * without changining configure.in */
1497         ret = idmap_alloc_ldap_init();
1498         if (! NT_STATUS_IS_OK(ret)) {
1499                 return ret;
1500         }
1501         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "ldap",
1502                                   &idmap_ldap_methods);
1503 }
1504