source4/winbind/idmap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Map SIDs to unixids and back
   5
   6    Copyright (C) Kai Blin 2008
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "auth/auth.h"
  24 #include "librpc/gen_ndr/ndr_security.h"
  25 #include "lib/ldb/include/ldb.h"
  26 #include "ldb_wrap.h"
  27 #include "param/param.h"
  28 #include "winbind/idmap.h"
  29 #include "libcli/security/security.h"
  30 #include "libcli/ldap/ldap_ndr.h"
  31
  32 /**
  33  * Get uid/gid bounds from idmap database
  34  *
  35  * \param idmap_ctx idmap context to use
  36  * \param low lower uid/gid bound is stored here
  37  * \param high upper uid/gid bound is stored here
  38  * \return 0 on success, nonzero on failure
  39  */
  40 static int idmap_get_bounds(struct idmap_context *idmap_ctx, uint32_t *low,
  41                 uint32_t *high)
  42 {
  43         int ret = -1;
  44         struct ldb_context *ldb = idmap_ctx->ldb_ctx;
  45         struct ldb_dn *dn;
  46         struct ldb_result *res = NULL;
  47         TALLOC_CTX *tmp_ctx = talloc_new(idmap_ctx);
  48         uint32_t lower_bound = (uint32_t) -1;
  49         uint32_t upper_bound = (uint32_t) -1;
  50
  51         dn = ldb_dn_new(tmp_ctx, ldb, "CN=CONFIG");
  52         if (dn == NULL) goto failed;
  53
  54         ret = ldb_search(ldb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, NULL, NULL);
  55         if (ret != LDB_SUCCESS) goto failed;
  56
  57         if (res->count != 1) {
  58                 ret = -1;
  59                 goto failed;
  60         }
  61
  62         lower_bound = ldb_msg_find_attr_as_uint(res->msgs[0], "lowerBound", -1);
  63         if (lower_bound != (uint32_t) -1) {
  64                 ret = LDB_SUCCESS;
  65         } else {
  66                 ret = -1;
  67                 goto failed;
  68         }
  69
  70         upper_bound = ldb_msg_find_attr_as_uint(res->msgs[0], "upperBound", -1);
  71         if (upper_bound != (uint32_t) -1) {
  72                 ret = LDB_SUCCESS;
  73         } else {
  74                 ret = -1;
  75         }
  76
  77 failed:
  78         talloc_free(tmp_ctx);
  79         *low  = lower_bound;
  80         *high = upper_bound;
  81         return ret;
  82 }
  83
  84 /**
  85  * Add a dom_sid structure to a ldb_message
  86  * \param idmap_ctx idmap context to use
  87  * \param mem_ctx talloc context to use
  88  * \param ldb_message ldb message to add dom_sid to
  89  * \param attr_name name of the attribute to store the dom_sid in
  90  * \param sid dom_sid to store
  91  * \return 0 on success, an ldb error code on failure.
  92  */
  93 static int idmap_msg_add_dom_sid(struct idmap_context *idmap_ctx,
  94                 TALLOC_CTX *mem_ctx, struct ldb_message *msg,
  95                 const char *attr_name, const struct dom_sid *sid)
  96 {
  97         struct ldb_val val;
  98         enum ndr_err_code ndr_err;
  99
 100         ndr_err = ndr_push_struct_blob(&val, mem_ctx, sid,
 101                                        (ndr_push_flags_fn_t)ndr_push_dom_sid);
 102
 103         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 104                 return -1;
 105         }
 106
 107         return ldb_msg_add_value(msg, attr_name, &val, NULL);
 108 }
 109
 110 /**
 111  * Get a dom_sid structure from a ldb message.
 112  *
 113  * \param mem_ctx talloc context to allocate dom_sid memory in
 114  * \param msg ldb_message to get dom_sid from
 115  * \param attr_name key that has the dom_sid as data
 116  * \return dom_sid structure on success, NULL on failure
 117  */
 118 static struct dom_sid *idmap_msg_get_dom_sid(TALLOC_CTX *mem_ctx,
 119                 struct ldb_message *msg, const char *attr_name)
 120 {
 121         struct dom_sid *sid;
 122         const struct ldb_val *val;
 123         enum ndr_err_code ndr_err;
 124
 125         val = ldb_msg_find_ldb_val(msg, attr_name);
 126         if (val == NULL) {
 127                 return NULL;
 128         }
 129
 130         sid = talloc(mem_ctx, struct dom_sid);
 131         if (sid == NULL) {
 132                 return NULL;
 133         }
 134
 135         ndr_err = ndr_pull_struct_blob(val, sid, sid,
 136                                        (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
 137         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 138                 talloc_free(sid);
 139                 return NULL;
 140         }
 141
 142         return sid;
 143 }
 144
 145 /**
 146  * Initialize idmap context
 147  *
 148  * talloc_free to close.
 149  *
 150  * \param mem_ctx talloc context to use.
 151  * \return allocated idmap_context on success, NULL on error
 152  */
 153 struct idmap_context *idmap_init(TALLOC_CTX *mem_ctx,
 154                                  struct tevent_context *ev_ctx,
 155                                  struct loadparm_context *lp_ctx)
 156 {
 157         struct idmap_context *idmap_ctx;
 158
 159         idmap_ctx = talloc(mem_ctx, struct idmap_context);
 160         if (idmap_ctx == NULL) {
 161                 return NULL;
 162         }
 163
 164         idmap_ctx->lp_ctx = lp_ctx;
 165
 166         idmap_ctx->ldb_ctx = ldb_wrap_connect(mem_ctx, ev_ctx, lp_ctx,
 167                                               lp_idmap_url(lp_ctx),
 168                                               system_session(lp_ctx),
 169                                               NULL, 0);
 170         if (idmap_ctx->ldb_ctx == NULL) {
 171                 return NULL;
 172         }
 173
 174         idmap_ctx->unix_groups_sid = dom_sid_parse_talloc(mem_ctx, "S-1-22-2");
 175         if (idmap_ctx->unix_groups_sid == NULL) {
 176                 return NULL;
 177         }
 178
 179         idmap_ctx->unix_users_sid = dom_sid_parse_talloc(mem_ctx, "S-1-22-1");
 180         if (idmap_ctx->unix_users_sid == NULL) {
 181                 return NULL;
 182         }
 183
 184         return idmap_ctx;
 185 }
 186
 187 /**
 188  * Convert an unixid to the corresponding SID
 189  *
 190  * \param idmap_ctx idmap context to use
 191  * \param mem_ctx talloc context the memory for the struct dom_sid is allocated
 192  * from.
 193  * \param unixid pointer to a unixid struct to convert
 194  * \param sid pointer that will take the struct dom_sid pointer if the mapping
 195  * succeeds.
 196  * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping not
 197  * possible or some other NTSTATUS that is more descriptive on failure.
 198  */
 199
 200 static NTSTATUS idmap_xid_to_sid(struct idmap_context *idmap_ctx,
 201                                  TALLOC_CTX *mem_ctx,
 202                                  const struct unixid *unixid,
 203                                  struct dom_sid **sid)
 204 {
 205         int ret;
 206         NTSTATUS status = NT_STATUS_NONE_MAPPED;
 207         struct ldb_context *ldb = idmap_ctx->ldb_ctx;
 208         struct ldb_result *res = NULL;
 209         struct dom_sid *unix_sid, *new_sid;
 210         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 211         const char *id_type;
 212
 213         switch (unixid->type) {
 214                 case ID_TYPE_UID:
 215                         id_type = "ID_TYPE_UID";
 216                         break;
 217                 case ID_TYPE_GID:
 218                         id_type = "ID_TYPE_GID";
 219                         break;
 220                 default:
 221                         DEBUG(1, ("unixid->type must be type gid or uid (got %u) for lookup with id %lu\n",
 222                                   (unsigned)unixid->type, (unsigned long)unixid->id));
 223                         status = NT_STATUS_NONE_MAPPED;
 224                         goto failed;
 225         }
 226
 227         ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 228                                  NULL, "(&(|(type=ID_TYPE_BOTH)(type=%s))"
 229                                  "(xidNumber=%u))", id_type, unixid->id);
 230         if (ret != LDB_SUCCESS) {
 231                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 232                 status = NT_STATUS_NONE_MAPPED;
 233                 goto failed;
 234         }
 235
 236         if (res->count == 1) {
 237                 *sid = idmap_msg_get_dom_sid(mem_ctx, res->msgs[0],
 238                                              "objectSid");
 239                 if (*sid == NULL) {
 240                         DEBUG(1, ("Failed to get sid from db: %u\n", ret));
 241                         status = NT_STATUS_NONE_MAPPED;
 242                         goto failed;
 243                 }
 244                 talloc_free(tmp_ctx);
 245                 return NT_STATUS_OK;
 246         }
 247
 248         DEBUG(6, ("xid not found in idmap db, create S-1-22- SID.\n"));
 249
 250         /* For local users/groups , we just create a rid = uid/gid */
 251         if (unixid->type == ID_TYPE_UID) {
 252                 unix_sid = dom_sid_parse_talloc(tmp_ctx, "S-1-22-1");
 253         } else {
 254                 unix_sid = dom_sid_parse_talloc(tmp_ctx, "S-1-22-2");
 255         }
 256         if (unix_sid == NULL) {
 257                 status = NT_STATUS_NO_MEMORY;
 258                 goto failed;
 259         }
 260
 261         new_sid = dom_sid_add_rid(mem_ctx, unix_sid, unixid->id);
 262         if (new_sid == NULL) {
 263                 status = NT_STATUS_NO_MEMORY;
 264                 goto failed;
 265         }
 266
 267         *sid = new_sid;
 268         talloc_free(tmp_ctx);
 269         return NT_STATUS_OK;
 270
 271 failed:
 272         talloc_free(tmp_ctx);
 273         return status;
 274 }
 275
 276
 277 /**
 278  * Map a SID to an unixid struct.
 279  *
 280  * If no mapping exists, a new mapping will be created.
 281  *
 282  * \todo Check if SIDs can be resolved if lp_idmap_trusted_only() == true
 283  * \todo Fix backwards compatibility for Samba3
 284  *
 285  * \param idmap_ctx idmap context to use
 286  * \param mem_ctx talloc context to use
 287  * \param sid SID to map to an unixid struct
 288  * \param unixid pointer to a unixid struct
 289  * \return NT_STATUS_OK on success, NT_STATUS_INVALID_SID if the sid is not from
 290  * a trusted domain and idmap trusted only = true, NT_STATUS_NONE_MAPPED if the
 291  * mapping failed.
 292  */
 293 static NTSTATUS idmap_sid_to_xid(struct idmap_context *idmap_ctx,
 294                                  TALLOC_CTX *mem_ctx,
 295                                  const struct dom_sid *sid,
 296                                  struct unixid *unixid)
 297 {
 298         int ret;
 299         NTSTATUS status = NT_STATUS_NONE_MAPPED;
 300         struct ldb_context *ldb = idmap_ctx->ldb_ctx;
 301         struct ldb_dn *dn;
 302         struct ldb_message *hwm_msg, *map_msg;
 303         struct ldb_result *res = NULL;
 304         int trans;
 305         uint32_t low, high, hwm, new_xid;
 306         char *sid_string, *unixid_string, *hwm_string;
 307         bool hwm_entry_exists;
 308         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 309
 310         if (dom_sid_in_domain(idmap_ctx->unix_users_sid, sid)) {
 311                 uint32_t rid;
 312                 DEBUG(6, ("This is a local unix uid, just calculate that.\n"));
 313                 status = dom_sid_split_rid(tmp_ctx, sid, NULL, &rid);
 314                 if (!NT_STATUS_IS_OK(status)) goto failed;
 315
 316                 unixid->id = rid;
 317                 unixid->type = ID_TYPE_UID;
 318
 319                 talloc_free(tmp_ctx);
 320                 return NT_STATUS_OK;
 321         }
 322
 323         if (dom_sid_in_domain(idmap_ctx->unix_groups_sid, sid)) {
 324                 uint32_t rid;
 325                 DEBUG(6, ("This is a local unix gid, just calculate that.\n"));
 326                 status = dom_sid_split_rid(tmp_ctx, sid, NULL, &rid);
 327                 if (!NT_STATUS_IS_OK(status)) goto failed;
 328
 329                 unixid->id = rid;
 330                 unixid->type = ID_TYPE_GID;
 331
 332                 talloc_free(tmp_ctx);
 333                 return NT_STATUS_OK;
 334          }
 335
 336         ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 337                                  NULL, "(&(objectClass=sidMap)(objectSid=%s))",
 338                                  ldap_encode_ndr_dom_sid(tmp_ctx, sid));
 339         if (ret != LDB_SUCCESS) {
 340                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 341                 status = NT_STATUS_NONE_MAPPED;
 342                 goto failed;
 343         }
 344
 345         if (res->count == 1) {
 346                 const char *type = ldb_msg_find_attr_as_string(res->msgs[0],
 347                                                                "type", NULL);
 348                 new_xid = ldb_msg_find_attr_as_uint(res->msgs[0], "xidNumber",
 349                                                     -1);
 350                 if (new_xid == (uint32_t) -1) {
 351                         DEBUG(1, ("Invalid xid mapping.\n"));
 352                         status = NT_STATUS_NONE_MAPPED;
 353                         goto failed;
 354                 }
 355
 356                 if (type == NULL) {
 357                         DEBUG(1, ("Invalid type for mapping entry.\n"));
 358                         status = NT_STATUS_NONE_MAPPED;
 359                         goto failed;
 360                 }
 361
 362                 unixid->id = new_xid;
 363
 364                 if (strcmp(type, "ID_TYPE_BOTH") == 0) {
 365                         unixid->type = ID_TYPE_BOTH;
 366                 } else if (strcmp(type, "ID_TYPE_UID") == 0) {
 367                         unixid->type = ID_TYPE_UID;
 368                 } else {
 369                         unixid->type = ID_TYPE_GID;
 370                 }
 371
 372                 talloc_free(tmp_ctx);
 373                 return NT_STATUS_OK;
 374         }
 375
 376         DEBUG(6, ("No existing mapping found, attempting to create one.\n"));
 377
 378         trans = ldb_transaction_start(ldb);
 379         if (trans != LDB_SUCCESS) {
 380                 status = NT_STATUS_NONE_MAPPED;
 381                 goto failed;
 382         }
 383
 384         /* Redo the search to make sure noone changed the mapping while we
 385          * weren't looking */
 386         ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 387                                  NULL, "(&(objectClass=sidMap)(objectSid=%s))",
 388                                  ldap_encode_ndr_dom_sid(tmp_ctx, sid));
 389         if (ret != LDB_SUCCESS) {
 390                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 391                 status = NT_STATUS_NONE_MAPPED;
 392                 goto failed;
 393         }
 394
 395         if (res->count > 0) {
 396                 DEBUG(1, ("Database changed while trying to add a sidmap.\n"));
 397                 status = NT_STATUS_RETRY;
 398                 goto failed;
 399         }
 400
 401         /*FIXME: if lp_idmap_trusted_only() == true, check if SID can be
 402          * resolved here. */
 403
 404         ret = idmap_get_bounds(idmap_ctx, &low, &high);
 405         if (ret != LDB_SUCCESS) {
 406                 status = NT_STATUS_NONE_MAPPED;
 407                 goto failed;
 408         }
 409
 410         dn = ldb_dn_new(tmp_ctx, ldb, "CN=CONFIG");
 411         if (dn == NULL) {
 412                 status = NT_STATUS_NO_MEMORY;
 413                 goto failed;
 414         }
 415
 416         ret = ldb_search(ldb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, NULL, NULL);
 417         if (ret != LDB_SUCCESS) {
 418                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 419                 status = NT_STATUS_NONE_MAPPED;
 420                 goto failed;
 421         }
 422
 423         if (res->count != 1) {
 424                 DEBUG(1, ("No CN=CONFIG record, idmap database is broken.\n"));
 425                 status = NT_STATUS_NONE_MAPPED;
 426                 goto failed;
 427         }
 428
 429         hwm = ldb_msg_find_attr_as_uint(res->msgs[0], "xidNumber", -1);
 430         if (hwm == (uint32_t)-1) {
 431                 hwm = low;
 432                 hwm_entry_exists = false;
 433         } else {
 434                 hwm_entry_exists = true;
 435         }
 436
 437         if (hwm > high) {
 438                 DEBUG(1, ("Out of xids to allocate.\n"));
 439                 status = NT_STATUS_NONE_MAPPED;
 440                 goto failed;
 441         }
 442
 443         hwm_msg = ldb_msg_new(tmp_ctx);
 444         if (hwm_msg == NULL) {
 445                 DEBUG(1, ("Out of memory when creating ldb_message\n"));
 446                 status = NT_STATUS_NO_MEMORY;
 447                 goto failed;
 448         }
 449
 450         hwm_msg->dn = dn;
 451
 452         new_xid = hwm;
 453         hwm++;
 454
 455         hwm_string = talloc_asprintf(tmp_ctx, "%u", hwm);
 456         if (hwm_string == NULL) {
 457                 status = NT_STATUS_NO_MEMORY;
 458                 goto failed;
 459         }
 460
 461         sid_string = dom_sid_string(tmp_ctx, sid);
 462         if (sid_string == NULL) {
 463                 status = NT_STATUS_NO_MEMORY;
 464                 goto failed;
 465         }
 466
 467         unixid_string = talloc_asprintf(tmp_ctx, "%u", new_xid);
 468         if (unixid_string == NULL) {
 469                 status = NT_STATUS_NO_MEMORY;
 470                 goto failed;
 471         }
 472
 473         if (hwm_entry_exists) {
 474                 struct ldb_message_element *els;
 475                 struct ldb_val *vals;
 476
 477                 /* We're modifying the entry, not just adding a new one. */
 478                 els = talloc_array(tmp_ctx, struct ldb_message_element, 2);
 479                 if (els == NULL) {
 480                         status = NT_STATUS_NO_MEMORY;
 481                         goto failed;
 482                 }
 483
 484                 vals = talloc_array(tmp_ctx, struct ldb_val, 2);
 485                 if (els == NULL) {
 486                         status = NT_STATUS_NO_MEMORY;
 487                         goto failed;
 488                 }
 489
 490                 hwm_msg->num_elements = 2;
 491                 hwm_msg->elements = els;
 492
 493                 els[0].num_values = 1;
 494                 els[0].values = &vals[0];
 495                 els[0].flags = LDB_FLAG_MOD_DELETE;
 496                 els[0].name = talloc_strdup(tmp_ctx, "xidNumber");
 497                 if (els[0].name == NULL) {
 498                         status = NT_STATUS_NO_MEMORY;
 499                         goto failed;
 500                 }
 501
 502                 els[1].num_values = 1;
 503                 els[1].values = &vals[1];
 504                 els[1].flags = LDB_FLAG_MOD_ADD;
 505                 els[1].name = els[0].name;
 506
 507                 vals[0].data = (uint8_t *)unixid_string;
 508                 vals[0].length = strlen(unixid_string);
 509                 vals[1].data = (uint8_t *)hwm_string;
 510                 vals[1].length = strlen(hwm_string);
 511         } else {
 512                 ret = ldb_msg_add_empty(hwm_msg, "xidNumber", LDB_FLAG_MOD_ADD,
 513                                         NULL);
 514                 if (ret != LDB_SUCCESS) {
 515                         status = NT_STATUS_NONE_MAPPED;
 516                         goto failed;
 517                 }
 518
 519                 ret = ldb_msg_add_string(hwm_msg, "xidNumber", hwm_string);
 520                 if (ret != LDB_SUCCESS)
 521                 {
 522                         status = NT_STATUS_NONE_MAPPED;
 523                         goto failed;
 524                 }
 525         }
 526
 527         ret = ldb_modify(ldb, hwm_msg);
 528         if (ret != LDB_SUCCESS) {
 529                 DEBUG(1, ("Updating the xid high water mark failed: %s\n",
 530                           ldb_errstring(ldb)));
 531                 status = NT_STATUS_NONE_MAPPED;
 532                 goto failed;
 533         }
 534
 535         map_msg = ldb_msg_new(tmp_ctx);
 536         if (map_msg == NULL) {
 537                 status = NT_STATUS_NO_MEMORY;
 538                 goto failed;
 539         }
 540
 541         map_msg->dn = ldb_dn_new_fmt(tmp_ctx, ldb, "CN=%s", sid_string);
 542         if (map_msg->dn == NULL) {
 543                 status = NT_STATUS_NO_MEMORY;
 544                 goto failed;
 545         }
 546
 547         ret = ldb_msg_add_string(map_msg, "xidNumber", unixid_string);
 548         if (ret != LDB_SUCCESS) {
 549                 status = NT_STATUS_NONE_MAPPED;
 550                 goto failed;
 551         }
 552
 553         ret = idmap_msg_add_dom_sid(idmap_ctx, tmp_ctx, map_msg, "objectSid",
 554                         sid);
 555         if (ret != LDB_SUCCESS) {
 556                 status = NT_STATUS_NONE_MAPPED;
 557                 goto failed;
 558         }
 559
 560         ret = ldb_msg_add_string(map_msg, "objectClass", "sidMap");
 561         if (ret != LDB_SUCCESS) {
 562                 status = NT_STATUS_NONE_MAPPED;
 563                 goto failed;
 564         }
 565
 566         ret = ldb_msg_add_string(map_msg, "type", "ID_TYPE_BOTH");
 567         if (ret != LDB_SUCCESS) {
 568                 status = NT_STATUS_NONE_MAPPED;
 569                 goto failed;
 570         }
 571
 572         ret = ldb_msg_add_string(map_msg, "cn", sid_string);
 573         if (ret != LDB_SUCCESS) {
 574                 status = NT_STATUS_NONE_MAPPED;
 575                 goto failed;
 576         }
 577
 578         ret = ldb_add(ldb, map_msg);
 579         if (ret != LDB_SUCCESS) {
 580                 DEBUG(1, ("Adding a sidmap failed: %s\n", ldb_errstring(ldb)));
 581                 status = NT_STATUS_NONE_MAPPED;
 582                 goto failed;
 583         }
 584
 585         trans = ldb_transaction_commit(ldb);
 586         if (trans != LDB_SUCCESS) {
 587                 DEBUG(1, ("Transaction failed: %s\n", ldb_errstring(ldb)));
 588                 status = NT_STATUS_NONE_MAPPED;
 589                 goto failed;
 590         }
 591
 592         unixid->id = new_xid;
 593         unixid->type = ID_TYPE_BOTH;
 594         talloc_free(tmp_ctx);
 595         return NT_STATUS_OK;
 596
 597 failed:
 598         if (trans == LDB_SUCCESS) ldb_transaction_cancel(ldb);
 599         talloc_free(tmp_ctx);
 600         return status;
 601 }
 602
 603 /**
 604  * Convert an array of unixids to the corresponding array of SIDs
 605  *
 606  * \param idmap_ctx idmap context to use
 607  * \param mem_ctx talloc context the memory for the dom_sids is allocated
 608  * from.
 609  * \param count length of id_mapping array.
 610  * \param id array of id_mappings.
 611  * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping is not
 612  * possible at all, NT_STATUS_SOME_UNMAPPED if some mappings worked and some
 613  * did not.
 614  */
 615
 616 NTSTATUS idmap_xids_to_sids(struct idmap_context *idmap_ctx,
 617                             TALLOC_CTX *mem_ctx,
 618                             struct id_map **id)
 619 {
 620         unsigned int i, error_count = 0;
 621         NTSTATUS status;
 622
 623         for (i = 0; id && id[i]; i++) {
 624                 status = idmap_xid_to_sid(idmap_ctx, mem_ctx,
 625                                                 &id[i]->xid, &id[i]->sid);
 626                 if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
 627                         status = idmap_xid_to_sid(idmap_ctx, mem_ctx,
 628                                                         &id[i]->xid,
 629                                                         &id[i]->sid);
 630                 }
 631                 if (!NT_STATUS_IS_OK(status)) {
 632                         DEBUG(1, ("idmapping xid_to_sid failed for id[%d]=%lu: %s\n",
 633                                   i, (unsigned long)id[i]->xid.id, nt_errstr(status)));
 634                         error_count++;
 635                         id[i]->status = ID_UNMAPPED;
 636                 } else {
 637                         id[i]->status = ID_MAPPED;
 638                 }
 639         }
 640
 641         if (error_count == i) {
 642                 /* Mapping did not work at all. */
 643                 return NT_STATUS_NONE_MAPPED;
 644         } else if (error_count > 0) {
 645                 /* Some mappings worked, some did not. */
 646                 return STATUS_SOME_UNMAPPED;
 647         } else {
 648                 return NT_STATUS_OK;
 649         }
 650 }
 651
 652 /**
 653  * Convert an array of SIDs to the corresponding array of unixids
 654  *
 655  * \param idmap_ctx idmap context to use
 656  * \param mem_ctx talloc context the memory for the unixids is allocated
 657  * from.
 658  * \param count length of id_mapping array.
 659  * \param id array of id_mappings.
 660  * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping is not
 661  * possible at all, NT_STATUS_SOME_UNMAPPED if some mappings worked and some
 662  * did not.
 663  */
 664
 665 NTSTATUS idmap_sids_to_xids(struct idmap_context *idmap_ctx,
 666                             TALLOC_CTX *mem_ctx,
 667                             struct id_map **id)
 668 {
 669         unsigned int i, error_count = 0;
 670         NTSTATUS status;
 671
 672         for (i = 0; id && id[i]; i++) {
 673                 status = idmap_sid_to_xid(idmap_ctx, mem_ctx,
 674                                           id[i]->sid, &id[i]->xid);
 675                 if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
 676                         status = idmap_sid_to_xid(idmap_ctx, mem_ctx,
 677                                                   id[i]->sid,
 678                                                   &id[i]->xid);
 679                 }
 680                 if (!NT_STATUS_IS_OK(status)) {
 681                         char *str = dom_sid_string(mem_ctx, id[i]->sid);
 682                         DEBUG(1, ("idmapping sid_to_xid failed for id[%d]=%s: %s\n",
 683                                   i, str, nt_errstr(status)));
 684                         talloc_free(str);
 685                         error_count++;
 686                         id[i]->status = ID_UNMAPPED;
 687                 } else {
 688                         id[i]->status = ID_MAPPED;
 689                 }
 690         }
 691
 692         if (error_count == i) {
 693                 /* Mapping did not work at all. */
 694                 return NT_STATUS_NONE_MAPPED;
 695         } else if (error_count > 0) {
 696                 /* Some mappings worked, some did not. */
 697                 return STATUS_SOME_UNMAPPED;
 698         } else {
 699                 return NT_STATUS_OK;
 700         }
 701 }
 702