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,
 101                                        lp_iconv_convenience(idmap_ctx->lp_ctx),
 102                                        sid,
 103                                        (ndr_push_flags_fn_t)ndr_push_dom_sid);
 104
 105         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 106                 return -1;
 107         }
 108
 109         return ldb_msg_add_value(msg, attr_name, &val, NULL);
 110 }
 111
 112 /**
 113  * Get a dom_sid structure from a ldb message.
 114  *
 115  * \param mem_ctx talloc context to allocate dom_sid memory in
 116  * \param msg ldb_message to get dom_sid from
 117  * \param attr_name key that has the dom_sid as data
 118  * \return dom_sid structure on success, NULL on failure
 119  */
 120 static struct dom_sid *idmap_msg_get_dom_sid(TALLOC_CTX *mem_ctx,
 121                 struct ldb_message *msg, const char *attr_name)
 122 {
 123         struct dom_sid *sid;
 124         const struct ldb_val *val;
 125         enum ndr_err_code ndr_err;
 126
 127         val = ldb_msg_find_ldb_val(msg, attr_name);
 128         if (val == NULL) {
 129                 return NULL;
 130         }
 131
 132         sid = talloc(mem_ctx, struct dom_sid);
 133         if (sid == NULL) {
 134                 return NULL;
 135         }
 136
 137         ndr_err = ndr_pull_struct_blob(val, sid, NULL, sid,
 138                                        (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
 139         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 140                 talloc_free(sid);
 141                 return NULL;
 142         }
 143
 144         return sid;
 145 }
 146
 147 /**
 148  * Initialize idmap context
 149  *
 150  * talloc_free to close.
 151  *
 152  * \param mem_ctx talloc context to use.
 153  * \return allocated idmap_context on success, NULL on error
 154  */
 155 struct idmap_context *idmap_init(TALLOC_CTX *mem_ctx,
 156                                  struct tevent_context *ev_ctx,
 157                 struct loadparm_context *lp_ctx)
 158 {
 159         struct idmap_context *idmap_ctx;
 160
 161         idmap_ctx = talloc(mem_ctx, struct idmap_context);
 162         if (idmap_ctx == NULL) {
 163                 return NULL;
 164         }
 165
 166         idmap_ctx->lp_ctx = lp_ctx;
 167
 168         idmap_ctx->ldb_ctx = ldb_wrap_connect(mem_ctx, ev_ctx, lp_ctx,
 169                                               lp_idmap_url(lp_ctx),
 170                                               system_session(lp_ctx),
 171                                               NULL, 0);
 172         if (idmap_ctx->ldb_ctx == NULL) {
 173                 return NULL;
 174         }
 175
 176         idmap_ctx->unix_groups_sid = dom_sid_parse_talloc(mem_ctx, "S-1-22-2");
 177         if (idmap_ctx->unix_groups_sid == NULL) {
 178                 return NULL;
 179         }
 180
 181         idmap_ctx->unix_users_sid = dom_sid_parse_talloc(mem_ctx, "S-1-22-1");
 182         if (idmap_ctx->unix_users_sid == NULL) {
 183                 return NULL;
 184         }
 185
 186         return idmap_ctx;
 187 }
 188
 189 /**
 190  * Convert an unixid to the corresponding SID
 191  *
 192  * \param idmap_ctx idmap context to use
 193  * \param mem_ctx talloc context the memory for the struct dom_sid is allocated
 194  * from.
 195  * \param unixid pointer to a unixid struct to convert
 196  * \param sid pointer that will take the struct dom_sid pointer if the mapping
 197  * succeeds.
 198  * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping not
 199  * possible or some other NTSTATUS that is more descriptive on failure.
 200  */
 201
 202 static NTSTATUS idmap_xid_to_sid(struct idmap_context *idmap_ctx,
 203                                  TALLOC_CTX *mem_ctx,
 204                                  const struct unixid *unixid,
 205                                  struct dom_sid **sid)
 206 {
 207         int ret;
 208         NTSTATUS status = NT_STATUS_NONE_MAPPED;
 209         struct ldb_context *ldb = idmap_ctx->ldb_ctx;
 210         struct ldb_result *res = NULL;
 211         struct dom_sid *unix_sid, *new_sid;
 212         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 213         const char *id_type;
 214
 215         switch (unixid->type) {
 216                 case ID_TYPE_UID:
 217                         id_type = "ID_TYPE_UID";
 218                         break;
 219                 case ID_TYPE_GID:
 220                         id_type = "ID_TYPE_GID";
 221                         break;
 222                 default:
 223                         DEBUG(1, ("unixid->type must be type gid or uid\n"));
 224                         status = NT_STATUS_NONE_MAPPED;
 225                         goto failed;
 226         }
 227
 228         ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 229                                  NULL, "(&(|(type=ID_TYPE_BOTH)(type=%s))"
 230                                  "(xidNumber=%u))", id_type, unixid->id);
 231         if (ret != LDB_SUCCESS) {
 232                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 233                 status = NT_STATUS_NONE_MAPPED;
 234                 goto failed;
 235         }
 236
 237         if (res->count == 1) {
 238                 *sid = idmap_msg_get_dom_sid(mem_ctx, res->msgs[0],
 239                                              "objectSid");
 240                 if (*sid == NULL) {
 241                         DEBUG(1, ("Failed to get sid from db: %u\n", ret));
 242                         status = NT_STATUS_NONE_MAPPED;
 243                         goto failed;
 244                 }
 245                 talloc_free(tmp_ctx);
 246                 return NT_STATUS_OK;
 247         }
 248
 249         DEBUG(6, ("xid not found in idmap db, create S-1-22- SID.\n"));
 250
 251         /* For local users/groups , we just create a rid = uid/gid */
 252         if (unixid->type == ID_TYPE_UID) {
 253                 unix_sid = dom_sid_parse_talloc(tmp_ctx, "S-1-22-1");
 254         } else {
 255                 unix_sid = dom_sid_parse_talloc(tmp_ctx, "S-1-22-2");
 256         }
 257         if (unix_sid == NULL) {
 258                 status = NT_STATUS_NO_MEMORY;
 259                 goto failed;
 260         }
 261
 262         new_sid = dom_sid_add_rid(mem_ctx, unix_sid, unixid->id);
 263         if (new_sid == NULL) {
 264                 status = NT_STATUS_NO_MEMORY;
 265                 goto failed;
 266         }
 267
 268         *sid = new_sid;
 269         talloc_free(tmp_ctx);
 270         return NT_STATUS_OK;
 271
 272 failed:
 273         talloc_free(tmp_ctx);
 274         return status;
 275 }
 276
 277
 278 /**
 279  * Map a SID to an unixid struct.
 280  *
 281  * If no mapping exists, a new mapping will be created.
 282  *
 283  * \todo Check if SIDs can be resolved if lp_idmap_trusted_only() == true
 284  * \todo Fix backwards compatibility for Samba3
 285  *
 286  * \param idmap_ctx idmap context to use
 287  * \param mem_ctx talloc context to use
 288  * \param sid SID to map to an unixid struct
 289  * \param unixid pointer to a unixid struct pointer
 290  * \return NT_STATUS_OK on success, NT_STATUS_INVALID_SID if the sid is not from
 291  * a trusted domain and idmap trusted only = true, NT_STATUS_NONE_MAPPED if the
 292  * mapping failed.
 293  */
 294 static NTSTATUS idmap_sid_to_xid(struct idmap_context *idmap_ctx,
 295                                  TALLOC_CTX *mem_ctx,
 296                                  const struct dom_sid *sid,
 297                                  struct unixid **unixid)
 298 {
 299         int ret;
 300         NTSTATUS status = NT_STATUS_NONE_MAPPED;
 301         struct ldb_context *ldb = idmap_ctx->ldb_ctx;
 302         struct ldb_dn *dn;
 303         struct ldb_message *hwm_msg, *map_msg;
 304         struct ldb_result *res = NULL;
 305         int trans;
 306         uint32_t low, high, hwm, new_xid;
 307         char *sid_string, *unixid_string, *hwm_string;
 308         bool hwm_entry_exists;
 309         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 310
 311         if (dom_sid_in_domain(idmap_ctx->unix_users_sid, sid)) {
 312                 uint32_t rid;
 313                 DEBUG(6, ("This is a local unix uid, just calculate that.\n"));
 314                 status = dom_sid_split_rid(tmp_ctx, sid, NULL, &rid);
 315                 if (!NT_STATUS_IS_OK(status)) goto failed;
 316
 317                 *unixid = talloc(mem_ctx, struct unixid);
 318                 if (*unixid == NULL) {
 319                         status = NT_STATUS_NO_MEMORY;
 320                         goto failed;
 321                 }
 322                 (*unixid)->id = rid;
 323                 (*unixid)->type = ID_TYPE_UID;
 324
 325                 talloc_free(tmp_ctx);
 326                 return NT_STATUS_OK;
 327         }
 328
 329         if (dom_sid_in_domain(idmap_ctx->unix_groups_sid, sid)) {
 330                 uint32_t rid;
 331                 DEBUG(6, ("This is a local unix gid, just calculate that.\n"));
 332                 status = dom_sid_split_rid(tmp_ctx, sid, NULL, &rid);
 333                 if (!NT_STATUS_IS_OK(status)) goto failed;
 334
 335                 *unixid = talloc(mem_ctx, struct unixid);
 336                 if (*unixid == NULL) {
 337                         status = NT_STATUS_NO_MEMORY;
 338                         goto failed;
 339                 }
 340                 (*unixid)->id = rid;
 341                 (*unixid)->type = ID_TYPE_GID;
 342
 343                 talloc_free(tmp_ctx);
 344                 return NT_STATUS_OK;
 345          }
 346
 347         ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 348                                  NULL, "(&(objectClass=sidMap)(objectSid=%s))",
 349                                  ldap_encode_ndr_dom_sid(tmp_ctx, sid));
 350         if (ret != LDB_SUCCESS) {
 351                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 352                 status = NT_STATUS_NONE_MAPPED;
 353                 goto failed;
 354         }
 355
 356         if (res->count == 1) {
 357                 const char *type = ldb_msg_find_attr_as_string(res->msgs[0],
 358                                                                "type", NULL);
 359                 new_xid = ldb_msg_find_attr_as_uint(res->msgs[0], "xidNumber",
 360                                                     -1);
 361                 if (new_xid == (uint32_t) -1) {
 362                         DEBUG(1, ("Invalid xid mapping.\n"));
 363                         status = NT_STATUS_NONE_MAPPED;
 364                         goto failed;
 365                 }
 366
 367                 if (type == NULL) {
 368                         DEBUG(1, ("Invalid type for mapping entry.\n"));
 369                         status = NT_STATUS_NONE_MAPPED;
 370                         goto failed;
 371                 }
 372
 373                 *unixid = talloc(mem_ctx, struct unixid);
 374                 if (*unixid == NULL) {
 375                         status = NT_STATUS_NO_MEMORY;
 376                         goto failed;
 377                 }
 378
 379                 (*unixid)->id = new_xid;
 380
 381                 if (strcmp(type, "ID_TYPE_BOTH") == 0) {
 382                         (*unixid)->type = ID_TYPE_BOTH;
 383                 } else if (strcmp(type, "ID_TYPE_UID") == 0) {
 384                         (*unixid)->type = ID_TYPE_UID;
 385                 } else {
 386                         (*unixid)->type = ID_TYPE_GID;
 387                 }
 388
 389                 talloc_free(tmp_ctx);
 390                 return NT_STATUS_OK;
 391         }
 392
 393         DEBUG(6, ("No existing mapping found, attempting to create one.\n"));
 394
 395         trans = ldb_transaction_start(ldb);
 396         if (trans != LDB_SUCCESS) {
 397                 status = NT_STATUS_NONE_MAPPED;
 398                 goto failed;
 399         }
 400
 401         /* Redo the search to make sure noone changed the mapping while we
 402          * weren't looking */
 403         ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 404                                  NULL, "(&(objectClass=sidMap)(objectSid=%s))",
 405                                  ldap_encode_ndr_dom_sid(tmp_ctx, sid));
 406         if (ret != LDB_SUCCESS) {
 407                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 408                 status = NT_STATUS_NONE_MAPPED;
 409                 goto failed;
 410         }
 411
 412         if (res->count > 0) {
 413                 DEBUG(1, ("Database changed while trying to add a sidmap.\n"));
 414                 status = NT_STATUS_RETRY;
 415                 goto failed;
 416         }
 417
 418         /*FIXME: if lp_idmap_trusted_only() == true, check if SID can be
 419          * resolved here. */
 420
 421         ret = idmap_get_bounds(idmap_ctx, &low, &high);
 422         if (ret != LDB_SUCCESS) {
 423                 status = NT_STATUS_NONE_MAPPED;
 424                 goto failed;
 425         }
 426
 427         dn = ldb_dn_new(tmp_ctx, ldb, "CN=CONFIG");
 428         if (dn == NULL) {
 429                 status = NT_STATUS_NO_MEMORY;
 430                 goto failed;
 431         }
 432
 433         ret = ldb_search(ldb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, NULL, NULL);
 434         if (ret != LDB_SUCCESS) {
 435                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 436                 status = NT_STATUS_NONE_MAPPED;
 437                 goto failed;
 438         }
 439
 440         if (res->count != 1) {
 441                 DEBUG(1, ("No CN=CONFIG record, idmap database is broken.\n"));
 442                 status = NT_STATUS_NONE_MAPPED;
 443                 goto failed;
 444         }
 445
 446         hwm = ldb_msg_find_attr_as_uint(res->msgs[0], "xidNumber", -1);
 447         if (hwm == (uint32_t)-1) {
 448                 hwm = low;
 449                 hwm_entry_exists = false;
 450         } else {
 451                 hwm_entry_exists = true;
 452         }
 453
 454         if (hwm > high) {
 455                 DEBUG(1, ("Out of xids to allocate.\n"));
 456                 status = NT_STATUS_NONE_MAPPED;
 457                 goto failed;
 458         }
 459
 460         hwm_msg = ldb_msg_new(tmp_ctx);
 461         if (hwm_msg == NULL) {
 462                 DEBUG(1, ("Out of memory when creating ldb_message\n"));
 463                 status = NT_STATUS_NO_MEMORY;
 464                 goto failed;
 465         }
 466
 467         hwm_msg->dn = dn;
 468
 469         new_xid = hwm;
 470         hwm++;
 471
 472         hwm_string = talloc_asprintf(tmp_ctx, "%u", hwm);
 473         if (hwm_string == NULL) {
 474                 status = NT_STATUS_NO_MEMORY;
 475                 goto failed;
 476         }
 477
 478         sid_string = dom_sid_string(tmp_ctx, sid);
 479         if (sid_string == NULL) {
 480                 status = NT_STATUS_NO_MEMORY;
 481                 goto failed;
 482         }
 483
 484         unixid_string = talloc_asprintf(tmp_ctx, "%u", new_xid);
 485         if (unixid_string == NULL) {
 486                 status = NT_STATUS_NO_MEMORY;
 487                 goto failed;
 488         }
 489
 490         if (hwm_entry_exists) {
 491                 struct ldb_message_element *els;
 492                 struct ldb_val *vals;
 493
 494                 /* We're modifying the entry, not just adding a new one. */
 495                 els = talloc_array(tmp_ctx, struct ldb_message_element, 2);
 496                 if (els == NULL) {
 497                         status = NT_STATUS_NO_MEMORY;
 498                         goto failed;
 499                 }
 500
 501                 vals = talloc_array(tmp_ctx, struct ldb_val, 2);
 502                 if (els == NULL) {
 503                         status = NT_STATUS_NO_MEMORY;
 504                         goto failed;
 505                 }
 506
 507                 hwm_msg->num_elements = 2;
 508                 hwm_msg->elements = els;
 509
 510                 els[0].num_values = 1;
 511                 els[0].values = &vals[0];
 512                 els[0].flags = LDB_FLAG_MOD_DELETE;
 513                 els[0].name = talloc_strdup(tmp_ctx, "xidNumber");
 514                 if (els[0].name == NULL) {
 515                         status = NT_STATUS_NO_MEMORY;
 516                         goto failed;
 517                 }
 518
 519                 els[1].num_values = 1;
 520                 els[1].values = &vals[1];
 521                 els[1].flags = LDB_FLAG_MOD_ADD;
 522                 els[1].name = els[0].name;
 523
 524                 vals[0].data = (uint8_t *)unixid_string;
 525                 vals[0].length = strlen(unixid_string);
 526                 vals[1].data = (uint8_t *)hwm_string;
 527                 vals[1].length = strlen(hwm_string);
 528         } else {
 529                 ret = ldb_msg_add_empty(hwm_msg, "xidNumber", LDB_FLAG_MOD_ADD,
 530                                         NULL);
 531                 if (ret != LDB_SUCCESS) {
 532                         status = NT_STATUS_NONE_MAPPED;
 533                         goto failed;
 534                 }
 535
 536                 ret = ldb_msg_add_string(hwm_msg, "xidNumber", hwm_string);
 537                 if (ret != LDB_SUCCESS)
 538                 {
 539                         status = NT_STATUS_NONE_MAPPED;
 540                         goto failed;
 541                 }
 542         }
 543
 544         ret = ldb_modify(ldb, hwm_msg);
 545         if (ret != LDB_SUCCESS) {
 546                 DEBUG(1, ("Updating the xid high water mark failed: %s\n",
 547                           ldb_errstring(ldb)));
 548                 status = NT_STATUS_NONE_MAPPED;
 549                 goto failed;
 550         }
 551
 552         map_msg = ldb_msg_new(tmp_ctx);
 553         if (map_msg == NULL) {
 554                 status = NT_STATUS_NO_MEMORY;
 555                 goto failed;
 556         }
 557
 558         map_msg->dn = ldb_dn_new_fmt(tmp_ctx, ldb, "CN=%s", sid_string);
 559         if (map_msg->dn == NULL) {
 560                 status = NT_STATUS_NO_MEMORY;
 561                 goto failed;
 562         }
 563
 564         ret = ldb_msg_add_string(map_msg, "xidNumber", unixid_string);
 565         if (ret != LDB_SUCCESS) {
 566                 status = NT_STATUS_NONE_MAPPED;
 567                 goto failed;
 568         }
 569
 570         ret = idmap_msg_add_dom_sid(idmap_ctx, tmp_ctx, map_msg, "objectSid",
 571                         sid);
 572         if (ret != LDB_SUCCESS) {
 573                 status = NT_STATUS_NONE_MAPPED;
 574                 goto failed;
 575         }
 576
 577         ret = ldb_msg_add_string(map_msg, "objectClass", "sidMap");
 578         if (ret != LDB_SUCCESS) {
 579                 status = NT_STATUS_NONE_MAPPED;
 580                 goto failed;
 581         }
 582
 583         ret = ldb_msg_add_string(map_msg, "type", "ID_TYPE_BOTH");
 584         if (ret != LDB_SUCCESS) {
 585                 status = NT_STATUS_NONE_MAPPED;
 586                 goto failed;
 587         }
 588
 589         ret = ldb_msg_add_string(map_msg, "cn", sid_string);
 590         if (ret != LDB_SUCCESS) {
 591                 status = NT_STATUS_NONE_MAPPED;
 592                 goto failed;
 593         }
 594
 595         ret = ldb_add(ldb, map_msg);
 596         if (ret != LDB_SUCCESS) {
 597                 DEBUG(1, ("Adding a sidmap failed: %s\n", ldb_errstring(ldb)));
 598                 status = NT_STATUS_NONE_MAPPED;
 599                 goto failed;
 600         }
 601
 602         trans = ldb_transaction_commit(ldb);
 603         if (trans != LDB_SUCCESS) {
 604                 DEBUG(1, ("Transaction failed: %s\n", ldb_errstring(ldb)));
 605                 status = NT_STATUS_NONE_MAPPED;
 606                 goto failed;
 607         }
 608
 609         *unixid = talloc(mem_ctx, struct unixid);
 610         if (*unixid == NULL) {
 611                 status = NT_STATUS_NO_MEMORY;
 612                 goto failed;
 613         }
 614
 615         (*unixid)->id = new_xid;
 616         (*unixid)->type = ID_TYPE_BOTH;
 617         talloc_free(tmp_ctx);
 618         return NT_STATUS_OK;
 619
 620 failed:
 621         if (trans == LDB_SUCCESS) ldb_transaction_cancel(ldb);
 622         talloc_free(tmp_ctx);
 623         return status;
 624 }
 625
 626 /**
 627  * Convert an array of unixids to the corresponding array of SIDs
 628  *
 629  * \param idmap_ctx idmap context to use
 630  * \param mem_ctx talloc context the memory for the dom_sids is allocated
 631  * from.
 632  * \param count length of id_mapping array.
 633  * \param id array of id_mappings.
 634  * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping is not
 635  * possible at all, NT_STATUS_SOME_UNMAPPED if some mappings worked and some
 636  * did not.
 637  */
 638
 639 NTSTATUS idmap_xids_to_sids(struct idmap_context *idmap_ctx,
 640                             TALLOC_CTX *mem_ctx, int count,
 641                             struct id_mapping *id)
 642 {
 643         int i;
 644         int error_count = 0;
 645
 646         for (i = 0; i < count; ++i) {
 647                 id[i].status = idmap_xid_to_sid(idmap_ctx, mem_ctx,
 648                                                 id[i].unixid, &id[i].sid);
 649                 if (NT_STATUS_EQUAL(id[i].status, NT_STATUS_RETRY)) {
 650                         id[i].status = idmap_xid_to_sid(idmap_ctx, mem_ctx,
 651                                                         id[i].unixid,
 652                                                         &id[i].sid);
 653                 }
 654                 if (!NT_STATUS_IS_OK(id[i].status)) {
 655                         DEBUG(1, ("idmapping xid_to_sid failed for id[%d]\n", i));
 656                         error_count++;
 657                 }
 658         }
 659
 660         if (error_count == count) {
 661                 /* Mapping did not work at all. */
 662                 return NT_STATUS_NONE_MAPPED;
 663         } else if (error_count > 0) {
 664                 /* Some mappings worked, some did not. */
 665                 return STATUS_SOME_UNMAPPED;
 666         } else {
 667                 return NT_STATUS_OK;
 668         }
 669 }
 670
 671 /**
 672  * Convert an array of SIDs to the corresponding array of unixids
 673  *
 674  * \param idmap_ctx idmap context to use
 675  * \param mem_ctx talloc context the memory for the unixids is allocated
 676  * from.
 677  * \param count length of id_mapping array.
 678  * \param id array of id_mappings.
 679  * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping is not
 680  * possible at all, NT_STATUS_SOME_UNMAPPED if some mappings worked and some
 681  * did not.
 682  */
 683
 684 NTSTATUS idmap_sids_to_xids(struct idmap_context *idmap_ctx,
 685                             TALLOC_CTX *mem_ctx, int count,
 686                             struct id_mapping *id)
 687 {
 688         int i;
 689         int error_count = 0;
 690
 691         for (i = 0; i < count; ++i) {
 692                 id[i].status = idmap_sid_to_xid(idmap_ctx, mem_ctx,
 693                                                 id[i].sid, &id[i].unixid);
 694                 if (NT_STATUS_EQUAL(id[i].status, NT_STATUS_RETRY)) {
 695                         id[i].status = idmap_sid_to_xid(idmap_ctx, mem_ctx,
 696                                                         id[i].sid,
 697                                                         &id[i].unixid);
 698                 }
 699                 if (!NT_STATUS_IS_OK(id[i].status)) {
 700                         DEBUG(1, ("idmapping sid_to_xid failed for id[%d]\n", i));
 701                         error_count++;
 702                 }
 703         }
 704
 705         if (error_count == count) {
 706                 /* Mapping did not work at all. */
 707                 return NT_STATUS_NONE_MAPPED;
 708         } else if (error_count > 0) {
 709                 /* Some mappings worked, some did not. */
 710                 return STATUS_SOME_UNMAPPED;
 711         } else {
 712                 return NT_STATUS_OK;
 713         }
 714 }
 715