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 "lib/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\n"));
 222                         status = NT_STATUS_NONE_MAPPED;
 223                         goto failed;
 224         }
 225
 226         ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 227                                  NULL, "(&(|(type=ID_TYPE_BOTH)(type=%s))"
 228                                  "(xidNumber=%u))", id_type, unixid->id);
 229         if (ret != LDB_SUCCESS) {
 230                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 231                 status = NT_STATUS_NONE_MAPPED;
 232                 goto failed;
 233         }
 234
 235         if (res->count == 1) {
 236                 *sid = idmap_msg_get_dom_sid(mem_ctx, res->msgs[0],
 237                                              "objectSid");
 238                 if (*sid == NULL) {
 239                         DEBUG(1, ("Failed to get sid from db: %u\n", ret));
 240                         status = NT_STATUS_NONE_MAPPED;
 241                         goto failed;
 242                 }
 243                 talloc_free(tmp_ctx);
 244                 return NT_STATUS_OK;
 245         }
 246
 247         DEBUG(6, ("xid not found in idmap db, create S-1-22- SID.\n"));
 248
 249         /* For local users/groups , we just create a rid = uid/gid */
 250         if (unixid->type == ID_TYPE_UID) {
 251                 unix_sid = dom_sid_parse_talloc(tmp_ctx, "S-1-22-1");
 252         } else {
 253                 unix_sid = dom_sid_parse_talloc(tmp_ctx, "S-1-22-2");
 254         }
 255         if (unix_sid == NULL) {
 256                 status = NT_STATUS_NO_MEMORY;
 257                 goto failed;
 258         }
 259
 260         new_sid = dom_sid_add_rid(mem_ctx, unix_sid, unixid->id);
 261         if (new_sid == NULL) {
 262                 status = NT_STATUS_NO_MEMORY;
 263                 goto failed;
 264         }
 265
 266         *sid = new_sid;
 267         talloc_free(tmp_ctx);
 268         return NT_STATUS_OK;
 269
 270 failed:
 271         talloc_free(tmp_ctx);
 272         return status;
 273 }
 274
 275
 276 /**
 277  * Map a SID to an unixid struct.
 278  *
 279  * If no mapping exists, a new mapping will be created.
 280  *
 281  * \todo Check if SIDs can be resolved if lp_idmap_trusted_only() == true
 282  * \todo Fix backwards compatibility for Samba3
 283  *
 284  * \param idmap_ctx idmap context to use
 285  * \param mem_ctx talloc context to use
 286  * \param sid SID to map to an unixid struct
 287  * \param unixid pointer to a unixid struct
 288  * \return NT_STATUS_OK on success, NT_STATUS_INVALID_SID if the sid is not from
 289  * a trusted domain and idmap trusted only = true, NT_STATUS_NONE_MAPPED if the
 290  * mapping failed.
 291  */
 292 static NTSTATUS idmap_sid_to_xid(struct idmap_context *idmap_ctx,
 293                                  TALLOC_CTX *mem_ctx,
 294                                  const struct dom_sid *sid,
 295                                  struct unixid *unixid)
 296 {
 297         int ret;
 298         NTSTATUS status = NT_STATUS_NONE_MAPPED;
 299         struct ldb_context *ldb = idmap_ctx->ldb_ctx;
 300         struct ldb_dn *dn;
 301         struct ldb_message *hwm_msg, *map_msg;
 302         struct ldb_result *res = NULL;
 303         int trans;
 304         uint32_t low, high, hwm, new_xid;
 305         char *sid_string, *unixid_string, *hwm_string;
 306         bool hwm_entry_exists;
 307         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 308
 309         if (dom_sid_in_domain(idmap_ctx->unix_users_sid, sid)) {
 310                 uint32_t rid;
 311                 DEBUG(6, ("This is a local unix uid, just calculate that.\n"));
 312                 status = dom_sid_split_rid(tmp_ctx, sid, NULL, &rid);
 313                 if (!NT_STATUS_IS_OK(status)) goto failed;
 314
 315                 unixid->id = rid;
 316                 unixid->type = ID_TYPE_UID;
 317
 318                 talloc_free(tmp_ctx);
 319                 return NT_STATUS_OK;
 320         }
 321
 322         if (dom_sid_in_domain(idmap_ctx->unix_groups_sid, sid)) {
 323                 uint32_t rid;
 324                 DEBUG(6, ("This is a local unix gid, just calculate that.\n"));
 325                 status = dom_sid_split_rid(tmp_ctx, sid, NULL, &rid);
 326                 if (!NT_STATUS_IS_OK(status)) goto failed;
 327
 328                 unixid->id = rid;
 329                 unixid->type = ID_TYPE_GID;
 330
 331                 talloc_free(tmp_ctx);
 332                 return NT_STATUS_OK;
 333          }
 334
 335         ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 336                                  NULL, "(&(objectClass=sidMap)(objectSid=%s))",
 337                                  ldap_encode_ndr_dom_sid(tmp_ctx, sid));
 338         if (ret != LDB_SUCCESS) {
 339                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 340                 status = NT_STATUS_NONE_MAPPED;
 341                 goto failed;
 342         }
 343
 344         if (res->count == 1) {
 345                 const char *type = ldb_msg_find_attr_as_string(res->msgs[0],
 346                                                                "type", NULL);
 347                 new_xid = ldb_msg_find_attr_as_uint(res->msgs[0], "xidNumber",
 348                                                     -1);
 349                 if (new_xid == (uint32_t) -1) {
 350                         DEBUG(1, ("Invalid xid mapping.\n"));
 351                         status = NT_STATUS_NONE_MAPPED;
 352                         goto failed;
 353                 }
 354
 355                 if (type == NULL) {
 356                         DEBUG(1, ("Invalid type for mapping entry.\n"));
 357                         status = NT_STATUS_NONE_MAPPED;
 358                         goto failed;
 359                 }
 360
 361                 unixid->id = new_xid;
 362
 363                 if (strcmp(type, "ID_TYPE_BOTH") == 0) {
 364                         unixid->type = ID_TYPE_BOTH;
 365                 } else if (strcmp(type, "ID_TYPE_UID") == 0) {
 366                         unixid->type = ID_TYPE_UID;
 367                 } else {
 368                         unixid->type = ID_TYPE_GID;
 369                 }
 370
 371                 talloc_free(tmp_ctx);
 372                 return NT_STATUS_OK;
 373         }
 374
 375         DEBUG(6, ("No existing mapping found, attempting to create one.\n"));
 376
 377         trans = ldb_transaction_start(ldb);
 378         if (trans != LDB_SUCCESS) {
 379                 status = NT_STATUS_NONE_MAPPED;
 380                 goto failed;
 381         }
 382
 383         /* Redo the search to make sure noone changed the mapping while we
 384          * weren't looking */
 385         ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 386                                  NULL, "(&(objectClass=sidMap)(objectSid=%s))",
 387                                  ldap_encode_ndr_dom_sid(tmp_ctx, sid));
 388         if (ret != LDB_SUCCESS) {
 389                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 390                 status = NT_STATUS_NONE_MAPPED;
 391                 goto failed;
 392         }
 393
 394         if (res->count > 0) {
 395                 DEBUG(1, ("Database changed while trying to add a sidmap.\n"));
 396                 status = NT_STATUS_RETRY;
 397                 goto failed;
 398         }
 399
 400         /*FIXME: if lp_idmap_trusted_only() == true, check if SID can be
 401          * resolved here. */
 402
 403         ret = idmap_get_bounds(idmap_ctx, &low, &high);
 404         if (ret != LDB_SUCCESS) {
 405                 status = NT_STATUS_NONE_MAPPED;
 406                 goto failed;
 407         }
 408
 409         dn = ldb_dn_new(tmp_ctx, ldb, "CN=CONFIG");
 410         if (dn == NULL) {
 411                 status = NT_STATUS_NO_MEMORY;
 412                 goto failed;
 413         }
 414
 415         ret = ldb_search(ldb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, NULL, NULL);
 416         if (ret != LDB_SUCCESS) {
 417                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 418                 status = NT_STATUS_NONE_MAPPED;
 419                 goto failed;
 420         }
 421
 422         if (res->count != 1) {
 423                 DEBUG(1, ("No CN=CONFIG record, idmap database is broken.\n"));
 424                 status = NT_STATUS_NONE_MAPPED;
 425                 goto failed;
 426         }
 427
 428         hwm = ldb_msg_find_attr_as_uint(res->msgs[0], "xidNumber", -1);
 429         if (hwm == (uint32_t)-1) {
 430                 hwm = low;
 431                 hwm_entry_exists = false;
 432         } else {
 433                 hwm_entry_exists = true;
 434         }
 435
 436         if (hwm > high) {
 437                 DEBUG(1, ("Out of xids to allocate.\n"));
 438                 status = NT_STATUS_NONE_MAPPED;
 439                 goto failed;
 440         }
 441
 442         hwm_msg = ldb_msg_new(tmp_ctx);
 443         if (hwm_msg == NULL) {
 444                 DEBUG(1, ("Out of memory when creating ldb_message\n"));
 445                 status = NT_STATUS_NO_MEMORY;
 446                 goto failed;
 447         }
 448
 449         hwm_msg->dn = dn;
 450
 451         new_xid = hwm;
 452         hwm++;
 453
 454         hwm_string = talloc_asprintf(tmp_ctx, "%u", hwm);
 455         if (hwm_string == NULL) {
 456                 status = NT_STATUS_NO_MEMORY;
 457                 goto failed;
 458         }
 459
 460         sid_string = dom_sid_string(tmp_ctx, sid);
 461         if (sid_string == NULL) {
 462                 status = NT_STATUS_NO_MEMORY;
 463                 goto failed;
 464         }
 465
 466         unixid_string = talloc_asprintf(tmp_ctx, "%u", new_xid);
 467         if (unixid_string == NULL) {
 468                 status = NT_STATUS_NO_MEMORY;
 469                 goto failed;
 470         }
 471
 472         if (hwm_entry_exists) {
 473                 struct ldb_message_element *els;
 474                 struct ldb_val *vals;
 475
 476                 /* We're modifying the entry, not just adding a new one. */
 477                 els = talloc_array(tmp_ctx, struct ldb_message_element, 2);
 478                 if (els == NULL) {
 479                         status = NT_STATUS_NO_MEMORY;
 480                         goto failed;
 481                 }
 482
 483                 vals = talloc_array(tmp_ctx, struct ldb_val, 2);
 484                 if (els == NULL) {
 485                         status = NT_STATUS_NO_MEMORY;
 486                         goto failed;
 487                 }
 488
 489                 hwm_msg->num_elements = 2;
 490                 hwm_msg->elements = els;
 491
 492                 els[0].num_values = 1;
 493                 els[0].values = &vals[0];
 494                 els[0].flags = LDB_FLAG_MOD_DELETE;
 495                 els[0].name = talloc_strdup(tmp_ctx, "xidNumber");
 496                 if (els[0].name == NULL) {
 497                         status = NT_STATUS_NO_MEMORY;
 498                         goto failed;
 499                 }
 500
 501                 els[1].num_values = 1;
 502                 els[1].values = &vals[1];
 503                 els[1].flags = LDB_FLAG_MOD_ADD;
 504                 els[1].name = els[0].name;
 505
 506                 vals[0].data = (uint8_t *)unixid_string;
 507                 vals[0].length = strlen(unixid_string);
 508                 vals[1].data = (uint8_t *)hwm_string;
 509                 vals[1].length = strlen(hwm_string);
 510         } else {
 511                 ret = ldb_msg_add_empty(hwm_msg, "xidNumber", LDB_FLAG_MOD_ADD,
 512                                         NULL);
 513                 if (ret != LDB_SUCCESS) {
 514                         status = NT_STATUS_NONE_MAPPED;
 515                         goto failed;
 516                 }
 517
 518                 ret = ldb_msg_add_string(hwm_msg, "xidNumber", hwm_string);
 519                 if (ret != LDB_SUCCESS)
 520                 {
 521                         status = NT_STATUS_NONE_MAPPED;
 522                         goto failed;
 523                 }
 524         }
 525
 526         ret = ldb_modify(ldb, hwm_msg);
 527         if (ret != LDB_SUCCESS) {
 528                 DEBUG(1, ("Updating the xid high water mark failed: %s\n",
 529                           ldb_errstring(ldb)));
 530                 status = NT_STATUS_NONE_MAPPED;
 531                 goto failed;
 532         }
 533
 534         map_msg = ldb_msg_new(tmp_ctx);
 535         if (map_msg == NULL) {
 536                 status = NT_STATUS_NO_MEMORY;
 537                 goto failed;
 538         }
 539
 540         map_msg->dn = ldb_dn_new_fmt(tmp_ctx, ldb, "CN=%s", sid_string);
 541         if (map_msg->dn == NULL) {
 542                 status = NT_STATUS_NO_MEMORY;
 543                 goto failed;
 544         }
 545
 546         ret = ldb_msg_add_string(map_msg, "xidNumber", unixid_string);
 547         if (ret != LDB_SUCCESS) {
 548                 status = NT_STATUS_NONE_MAPPED;
 549                 goto failed;
 550         }
 551
 552         ret = idmap_msg_add_dom_sid(idmap_ctx, tmp_ctx, map_msg, "objectSid",
 553                         sid);
 554         if (ret != LDB_SUCCESS) {
 555                 status = NT_STATUS_NONE_MAPPED;
 556                 goto failed;
 557         }
 558
 559         ret = ldb_msg_add_string(map_msg, "objectClass", "sidMap");
 560         if (ret != LDB_SUCCESS) {
 561                 status = NT_STATUS_NONE_MAPPED;
 562                 goto failed;
 563         }
 564
 565         ret = ldb_msg_add_string(map_msg, "type", "ID_TYPE_BOTH");
 566         if (ret != LDB_SUCCESS) {
 567                 status = NT_STATUS_NONE_MAPPED;
 568                 goto failed;
 569         }
 570
 571         ret = ldb_msg_add_string(map_msg, "cn", sid_string);
 572         if (ret != LDB_SUCCESS) {
 573                 status = NT_STATUS_NONE_MAPPED;
 574                 goto failed;
 575         }
 576
 577         ret = ldb_add(ldb, map_msg);
 578         if (ret != LDB_SUCCESS) {
 579                 DEBUG(1, ("Adding a sidmap failed: %s\n", ldb_errstring(ldb)));
 580                 status = NT_STATUS_NONE_MAPPED;
 581                 goto failed;
 582         }
 583
 584         trans = ldb_transaction_commit(ldb);
 585         if (trans != LDB_SUCCESS) {
 586                 DEBUG(1, ("Transaction failed: %s\n", ldb_errstring(ldb)));
 587                 status = NT_STATUS_NONE_MAPPED;
 588                 goto failed;
 589         }
 590
 591         unixid->id = new_xid;
 592         unixid->type = ID_TYPE_BOTH;
 593         talloc_free(tmp_ctx);
 594         return NT_STATUS_OK;
 595
 596 failed:
 597         if (trans == LDB_SUCCESS) ldb_transaction_cancel(ldb);
 598         talloc_free(tmp_ctx);
 599         return status;
 600 }
 601
 602 /**
 603  * Convert an array of unixids to the corresponding array of SIDs
 604  *
 605  * \param idmap_ctx idmap context to use
 606  * \param mem_ctx talloc context the memory for the dom_sids is allocated
 607  * from.
 608  * \param count length of id_mapping array.
 609  * \param id array of id_mappings.
 610  * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping is not
 611  * possible at all, NT_STATUS_SOME_UNMAPPED if some mappings worked and some
 612  * did not.
 613  */
 614
 615 NTSTATUS idmap_xids_to_sids(struct idmap_context *idmap_ctx,
 616                             TALLOC_CTX *mem_ctx, int count,
 617                             struct id_map *id)
 618 {
 619         int i;
 620         int error_count = 0;
 621         NTSTATUS status;
 622
 623         for (i = 0; i < count; ++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]\n", i));
 633                         error_count++;
 634                         id[i].status = ID_UNMAPPED;
 635                 } else {
 636                         id[i].status = ID_MAPPED;
 637                 }
 638         }
 639
 640         if (error_count == count) {
 641                 /* Mapping did not work at all. */
 642                 return NT_STATUS_NONE_MAPPED;
 643         } else if (error_count > 0) {
 644                 /* Some mappings worked, some did not. */
 645                 return STATUS_SOME_UNMAPPED;
 646         } else {
 647                 return NT_STATUS_OK;
 648         }
 649 }
 650
 651 /**
 652  * Convert an array of SIDs to the corresponding array of unixids
 653  *
 654  * \param idmap_ctx idmap context to use
 655  * \param mem_ctx talloc context the memory for the unixids is allocated
 656  * from.
 657  * \param count length of id_mapping array.
 658  * \param id array of id_mappings.
 659  * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping is not
 660  * possible at all, NT_STATUS_SOME_UNMAPPED if some mappings worked and some
 661  * did not.
 662  */
 663
 664 NTSTATUS idmap_sids_to_xids(struct idmap_context *idmap_ctx,
 665                             TALLOC_CTX *mem_ctx, int count,
 666                             struct id_map *id)
 667 {
 668         int i;
 669         int error_count = 0;
 670         NTSTATUS status;
 671
 672         for (i = 0; i < count; ++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                         DEBUG(1, ("idmapping sid_to_xid failed for id[%d]\n", i));
 682                         error_count++;
 683                         id[i].status = ID_UNMAPPED;
 684                 } else {
 685                         id[i].status = ID_MAPPED;
 686                 }
 687         }
 688
 689         if (error_count == count) {
 690                 /* Mapping did not work at all. */
 691                 return NT_STATUS_NONE_MAPPED;
 692         } else if (error_count > 0) {
 693                 /* Some mappings worked, some did not. */
 694                 return STATUS_SOME_UNMAPPED;
 695         } else {
 696                 return NT_STATUS_OK;
 697         }
 698 }
 699