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 NTSTATUS idmap_xid_to_sid(struct idmap_context *idmap_ctx, TALLOC_CTX *mem_ctx,
 203                 const struct unixid *unixid, 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 pointer
 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 NTSTATUS idmap_sid_to_xid(struct idmap_context *idmap_ctx, TALLOC_CTX *mem_ctx,
 293                 const struct dom_sid *sid, struct unixid **unixid)
 294 {
 295         int ret;
 296         NTSTATUS status = NT_STATUS_NONE_MAPPED;
 297         struct ldb_context *ldb = idmap_ctx->ldb_ctx;
 298         struct ldb_dn *dn;
 299         struct ldb_message *hwm_msg, *map_msg;
 300         struct ldb_result *res = NULL;
 301         int trans;
 302         uint32_t low, high, hwm, new_xid;
 303         char *sid_string, *unixid_string, *hwm_string;
 304         bool hwm_entry_exists;
 305         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 306
 307         if (dom_sid_in_domain(idmap_ctx->unix_users_sid, sid)) {
 308                 uint32_t rid;
 309                 DEBUG(6, ("This is a local unix uid, just calculate that.\n"));
 310                 status = dom_sid_split_rid(tmp_ctx, sid, NULL, &rid);
 311                 if (!NT_STATUS_IS_OK(status)) goto failed;
 312
 313                 *unixid = talloc(mem_ctx, struct unixid);
 314                 if (*unixid == NULL) {
 315                         status = NT_STATUS_NO_MEMORY;
 316                         goto failed;
 317                 }
 318                 (*unixid)->id = rid;
 319                 (*unixid)->type = ID_TYPE_UID;
 320
 321                 talloc_free(tmp_ctx);
 322                 return NT_STATUS_OK;
 323         }
 324
 325         if (dom_sid_in_domain(idmap_ctx->unix_groups_sid, sid)) {
 326                 uint32_t rid;
 327                 DEBUG(6, ("This is a local unix gid, just calculate that.\n"));
 328                 status = dom_sid_split_rid(tmp_ctx, sid, NULL, &rid);
 329                 if (!NT_STATUS_IS_OK(status)) goto failed;
 330
 331                 *unixid = talloc(mem_ctx, struct unixid);
 332                 if (*unixid == NULL) {
 333                         status = NT_STATUS_NO_MEMORY;
 334                         goto failed;
 335                 }
 336                 (*unixid)->id = rid;
 337                 (*unixid)->type = ID_TYPE_GID;
 338
 339                 talloc_free(tmp_ctx);
 340                 return NT_STATUS_OK;
 341          }
 342
 343         ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 344                                  NULL, "(&(objectClass=sidMap)(objectSid=%s))",
 345                                  ldap_encode_ndr_dom_sid(tmp_ctx, sid));
 346         if (ret != LDB_SUCCESS) {
 347                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 348                 status = NT_STATUS_NONE_MAPPED;
 349                 goto failed;
 350         }
 351
 352         if (res->count == 1) {
 353                 const char *type = ldb_msg_find_attr_as_string(res->msgs[0],
 354                                                                "type", NULL);
 355                 new_xid = ldb_msg_find_attr_as_uint(res->msgs[0], "xidNumber",
 356                                                     -1);
 357                 if (new_xid == (uint32_t) -1) {
 358                         DEBUG(1, ("Invalid xid mapping.\n"));
 359                         status = NT_STATUS_NONE_MAPPED;
 360                         goto failed;
 361                 }
 362
 363                 if (type == NULL) {
 364                         DEBUG(1, ("Invalid type for mapping entry.\n"));
 365                         status = NT_STATUS_NONE_MAPPED;
 366                         goto failed;
 367                 }
 368
 369                 *unixid = talloc(mem_ctx, struct unixid);
 370                 if (*unixid == NULL) {
 371                         status = NT_STATUS_NO_MEMORY;
 372                         goto failed;
 373                 }
 374
 375                 (*unixid)->id = new_xid;
 376
 377                 if (strcmp(type, "ID_TYPE_BOTH") == 0) {
 378                         (*unixid)->type = ID_TYPE_BOTH;
 379                 } else if (strcmp(type, "ID_TYPE_UID") == 0) {
 380                         (*unixid)->type = ID_TYPE_UID;
 381                 } else {
 382                         (*unixid)->type = ID_TYPE_GID;
 383                 }
 384
 385                 talloc_free(tmp_ctx);
 386                 return NT_STATUS_OK;
 387         }
 388
 389         DEBUG(6, ("No existing mapping found, attempting to create one.\n"));
 390
 391         trans = ldb_transaction_start(ldb);
 392         if (trans != LDB_SUCCESS) {
 393                 status = NT_STATUS_NONE_MAPPED;
 394                 goto failed;
 395         }
 396
 397         /* Redo the search to make sure noone changed the mapping while we
 398          * weren't looking */
 399         ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 400                                  NULL, "(&(objectClass=sidMap)(objectSid=%s))",
 401                                  ldap_encode_ndr_dom_sid(tmp_ctx, sid));
 402         if (ret != LDB_SUCCESS) {
 403                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 404                 status = NT_STATUS_NONE_MAPPED;
 405                 goto failed;
 406         }
 407
 408         if (res->count > 0) {
 409                 DEBUG(1, ("Database changed while trying to add a sidmap.\n"));
 410                 status = NT_STATUS_RETRY;
 411                 goto failed;
 412         }
 413
 414         /*FIXME: if lp_idmap_trusted_only() == true, check if SID can be
 415          * resolved here. */
 416
 417         ret = idmap_get_bounds(idmap_ctx, &low, &high);
 418         if (ret != LDB_SUCCESS) {
 419                 status = NT_STATUS_NONE_MAPPED;
 420                 goto failed;
 421         }
 422
 423         dn = ldb_dn_new(tmp_ctx, ldb, "CN=CONFIG");
 424         if (dn == NULL) {
 425                 status = NT_STATUS_NO_MEMORY;
 426                 goto failed;
 427         }
 428
 429         ret = ldb_search(ldb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, NULL, NULL);
 430         if (ret != LDB_SUCCESS) {
 431                 DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
 432                 status = NT_STATUS_NONE_MAPPED;
 433                 goto failed;
 434         }
 435
 436         if (res->count != 1) {
 437                 DEBUG(1, ("No CN=CONFIG record, idmap database is broken.\n"));
 438                 status = NT_STATUS_NONE_MAPPED;
 439                 goto failed;
 440         }
 441
 442         hwm = ldb_msg_find_attr_as_uint(res->msgs[0], "xidNumber", -1);
 443         if (hwm == (uint32_t)-1) {
 444                 hwm = low;
 445                 hwm_entry_exists = false;
 446         } else {
 447                 hwm_entry_exists = true;
 448         }
 449
 450         if (hwm > high) {
 451                 DEBUG(1, ("Out of xids to allocate.\n"));
 452                 status = NT_STATUS_NONE_MAPPED;
 453                 goto failed;
 454         }
 455
 456         hwm_msg = ldb_msg_new(tmp_ctx);
 457         if (hwm_msg == NULL) {
 458                 DEBUG(1, ("Out of memory when creating ldb_message\n"));
 459                 status = NT_STATUS_NO_MEMORY;
 460                 goto failed;
 461         }
 462
 463         hwm_msg->dn = dn;
 464
 465         new_xid = hwm;
 466         hwm++;
 467
 468         hwm_string = talloc_asprintf(tmp_ctx, "%u", hwm);
 469         if (hwm_string == NULL) {
 470                 status = NT_STATUS_NO_MEMORY;
 471                 goto failed;
 472         }
 473
 474         sid_string = dom_sid_string(tmp_ctx, sid);
 475         if (sid_string == NULL) {
 476                 status = NT_STATUS_NO_MEMORY;
 477                 goto failed;
 478         }
 479
 480         unixid_string = talloc_asprintf(tmp_ctx, "%u", new_xid);
 481         if (unixid_string == NULL) {
 482                 status = NT_STATUS_NO_MEMORY;
 483                 goto failed;
 484         }
 485
 486         if (hwm_entry_exists) {
 487                 struct ldb_message_element *els;
 488                 struct ldb_val *vals;
 489
 490                 /* We're modifying the entry, not just adding a new one. */
 491                 els = talloc_array(tmp_ctx, struct ldb_message_element, 2);
 492                 if (els == NULL) {
 493                         status = NT_STATUS_NO_MEMORY;
 494                         goto failed;
 495                 }
 496
 497                 vals = talloc_array(tmp_ctx, struct ldb_val, 2);
 498                 if (els == NULL) {
 499                         status = NT_STATUS_NO_MEMORY;
 500                         goto failed;
 501                 }
 502
 503                 hwm_msg->num_elements = 2;
 504                 hwm_msg->elements = els;
 505
 506                 els[0].num_values = 1;
 507                 els[0].values = &vals[0];
 508                 els[0].flags = LDB_FLAG_MOD_DELETE;
 509                 els[0].name = talloc_strdup(tmp_ctx, "xidNumber");
 510                 if (els[0].name == NULL) {
 511                         status = NT_STATUS_NO_MEMORY;
 512                         goto failed;
 513                 }
 514
 515                 els[1].num_values = 1;
 516                 els[1].values = &vals[1];
 517                 els[1].flags = LDB_FLAG_MOD_ADD;
 518                 els[1].name = els[0].name;
 519
 520                 vals[0].data = (uint8_t *)unixid_string;
 521                 vals[0].length = strlen(unixid_string);
 522                 vals[1].data = (uint8_t *)hwm_string;
 523                 vals[1].length = strlen(hwm_string);
 524         } else {
 525                 ret = ldb_msg_add_empty(hwm_msg, "xidNumber", LDB_FLAG_MOD_ADD,
 526                                         NULL);
 527                 if (ret != LDB_SUCCESS) {
 528                         status = NT_STATUS_NONE_MAPPED;
 529                         goto failed;
 530                 }
 531
 532                 ret = ldb_msg_add_string(hwm_msg, "xidNumber", hwm_string);
 533                 if (ret != LDB_SUCCESS)
 534                 {
 535                         status = NT_STATUS_NONE_MAPPED;
 536                         goto failed;
 537                 }
 538         }
 539
 540         ret = ldb_modify(ldb, hwm_msg);
 541         if (ret != LDB_SUCCESS) {
 542                 DEBUG(1, ("Updating the xid high water mark failed: %s\n",
 543                           ldb_errstring(ldb)));
 544                 status = NT_STATUS_NONE_MAPPED;
 545                 goto failed;
 546         }
 547
 548         map_msg = ldb_msg_new(tmp_ctx);
 549         if (map_msg == NULL) {
 550                 status = NT_STATUS_NO_MEMORY;
 551                 goto failed;
 552         }
 553
 554         map_msg->dn = ldb_dn_new_fmt(tmp_ctx, ldb, "CN=%s", sid_string);
 555         if (map_msg->dn == NULL) {
 556                 status = NT_STATUS_NO_MEMORY;
 557                 goto failed;
 558         }
 559
 560         ret = ldb_msg_add_string(map_msg, "xidNumber", unixid_string);
 561         if (ret != LDB_SUCCESS) {
 562                 status = NT_STATUS_NONE_MAPPED;
 563                 goto failed;
 564         }
 565
 566         ret = idmap_msg_add_dom_sid(idmap_ctx, tmp_ctx, map_msg, "objectSid",
 567                         sid);
 568         if (ret != LDB_SUCCESS) {
 569                 status = NT_STATUS_NONE_MAPPED;
 570                 goto failed;
 571         }
 572
 573         ret = ldb_msg_add_string(map_msg, "objectClass", "sidMap");
 574         if (ret != LDB_SUCCESS) {
 575                 status = NT_STATUS_NONE_MAPPED;
 576                 goto failed;
 577         }
 578
 579         ret = ldb_msg_add_string(map_msg, "type", "ID_TYPE_BOTH");
 580         if (ret != LDB_SUCCESS) {
 581                 status = NT_STATUS_NONE_MAPPED;
 582                 goto failed;
 583         }
 584
 585         ret = ldb_msg_add_string(map_msg, "cn", sid_string);
 586         if (ret != LDB_SUCCESS) {
 587                 status = NT_STATUS_NONE_MAPPED;
 588                 goto failed;
 589         }
 590
 591         ret = ldb_add(ldb, map_msg);
 592         if (ret != LDB_SUCCESS) {
 593                 DEBUG(1, ("Adding a sidmap failed: %s\n", ldb_errstring(ldb)));
 594                 status = NT_STATUS_NONE_MAPPED;
 595                 goto failed;
 596         }
 597
 598         trans = ldb_transaction_commit(ldb);
 599         if (trans != LDB_SUCCESS) {
 600                 DEBUG(1, ("Transaction failed: %s\n", ldb_errstring(ldb)));
 601                 status = NT_STATUS_NONE_MAPPED;
 602                 goto failed;
 603         }
 604
 605         *unixid = talloc(mem_ctx, struct unixid);
 606         if (*unixid == NULL) {
 607                 status = NT_STATUS_NO_MEMORY;
 608                 goto failed;
 609         }
 610
 611         (*unixid)->id = new_xid;
 612         (*unixid)->type = ID_TYPE_BOTH;
 613         talloc_free(tmp_ctx);
 614         return NT_STATUS_OK;
 615
 616 failed:
 617         if (trans == LDB_SUCCESS) ldb_transaction_cancel(ldb);
 618         talloc_free(tmp_ctx);
 619         return status;
 620 }
 621
 622 /**
 623  * Convert an array of unixids to the corresponding array of SIDs
 624  *
 625  * \param idmap_ctx idmap context to use
 626  * \param mem_ctx talloc context the memory for the dom_sids is allocated
 627  * from.
 628  * \param count length of id_mapping array.
 629  * \param id array of id_mappings.
 630  * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping is not
 631  * possible at all, NT_STATUS_SOME_UNMAPPED if some mappings worked and some
 632  * did not.
 633  */
 634
 635 NTSTATUS idmap_xids_to_sids(struct idmap_context *idmap_ctx,
 636                             TALLOC_CTX *mem_ctx, int count,
 637                             struct id_mapping *id)
 638 {
 639         int i;
 640         int error_count = 0;
 641
 642         for (i = 0; i < count; ++i) {
 643                 id[i].status = idmap_xid_to_sid(idmap_ctx, mem_ctx,
 644                                                 id[i].unixid, &id[i].sid);
 645                 if (NT_STATUS_EQUAL(id[i].status, NT_STATUS_RETRY)) {
 646                         id[i].status = idmap_xid_to_sid(idmap_ctx, mem_ctx,
 647                                                         id[i].unixid,
 648                                                         &id[i].sid);
 649                 }
 650                 if (!NT_STATUS_IS_OK(id[i].status)) {
 651                         DEBUG(1, ("idmapping xid_to_sid failed for id[%d]\n", i));
 652                         error_count++;
 653                 }
 654         }
 655
 656         if (error_count == count) {
 657                 /* Mapping did not work at all. */
 658                 return NT_STATUS_NONE_MAPPED;
 659         } else if (error_count > 0) {
 660                 /* Some mappings worked, some did not. */
 661                 return STATUS_SOME_UNMAPPED;
 662         } else {
 663                 return NT_STATUS_OK;
 664         }
 665 }
 666
 667 /**
 668  * Convert an array of SIDs to the corresponding array of unixids
 669  *
 670  * \param idmap_ctx idmap context to use
 671  * \param mem_ctx talloc context the memory for the unixids is allocated
 672  * from.
 673  * \param count length of id_mapping array.
 674  * \param id array of id_mappings.
 675  * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping is not
 676  * possible at all, NT_STATUS_SOME_UNMAPPED if some mappings worked and some
 677  * did not.
 678  */
 679
 680 NTSTATUS idmap_sids_to_xids(struct idmap_context *idmap_ctx,
 681                             TALLOC_CTX *mem_ctx, int count,
 682                             struct id_mapping *id)
 683 {
 684         int i;
 685         int error_count = 0;
 686
 687         for (i = 0; i < count; ++i) {
 688                 id[i].status = idmap_sid_to_xid(idmap_ctx, mem_ctx,
 689                                                 id[i].sid, &id[i].unixid);
 690                 if (NT_STATUS_EQUAL(id[i].status, NT_STATUS_RETRY)) {
 691                         id[i].status = idmap_sid_to_xid(idmap_ctx, mem_ctx,
 692                                                         id[i].sid,
 693                                                         &id[i].unixid);
 694                 }
 695                 if (!NT_STATUS_IS_OK(id[i].status)) {
 696                         DEBUG(1, ("idmapping sid_to_xid failed for id[%d]\n", i));
 697                         error_count++;
 698                 }
 699         }
 700
 701         if (error_count == count) {
 702                 /* Mapping did not work at all. */
 703                 return NT_STATUS_NONE_MAPPED;
 704         } else if (error_count > 0) {
 705                 /* Some mappings worked, some did not. */
 706                 return STATUS_SOME_UNMAPPED;
 707         } else {
 708                 return NT_STATUS_OK;
 709         }
 710 }
 711