source3/winbindd/idmap_tdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    idmap TDB backend
   5
   6    Copyright (C) Tim Potter 2000
   7    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
   8    Copyright (C) Jeremy Allison 2006
   9    Copyright (C) Simo Sorce 2003-2006
  10    Copyright (C) Michael Adam 2009-2010
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 #include "includes.h"
  27 #include "system/filesys.h"
  28 #include "winbindd.h"
  29 #include "idmap.h"
  30 #include "idmap_rw.h"
  31 #include "dbwrap.h"
  32 #include "../libcli/security/security.h"
  33 #include "util_tdb.h"
  34
  35 #undef DBGC_CLASS
  36 #define DBGC_CLASS DBGC_IDMAP
  37
  38 /* idmap version determines auto-conversion - this is the database
  39    structure version specifier. */
  40
  41 #define IDMAP_VERSION 2
  42
  43 struct idmap_tdb_context {
  44         struct db_context *db;
  45         struct idmap_rw_ops *rw_ops;
  46 };
  47
  48 /* High water mark keys */
  49 #define HWM_GROUP  "GROUP HWM"
  50 #define HWM_USER   "USER HWM"
  51
  52 struct convert_fn_state {
  53         struct db_context *db;
  54         bool failed;
  55 };
  56
  57 /*****************************************************************************
  58  For idmap conversion: convert one record to new format
  59  Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
  60  instead of the SID.
  61 *****************************************************************************/
  62 static int convert_fn(struct db_record *rec, void *private_data)
  63 {
  64         struct winbindd_domain *domain;
  65         char *p;
  66         NTSTATUS status;
  67         struct dom_sid sid;
  68         uint32 rid;
  69         fstring keystr;
  70         fstring dom_name;
  71         TDB_DATA key2;
  72         struct convert_fn_state *s = (struct convert_fn_state *)private_data;
  73
  74         DEBUG(10,("Converting %s\n", (const char *)rec->key.dptr));
  75
  76         p = strchr((const char *)rec->key.dptr, '/');
  77         if (!p)
  78                 return 0;
  79
  80         *p = 0;
  81         fstrcpy(dom_name, (const char *)rec->key.dptr);
  82         *p++ = '/';
  83
  84         domain = find_domain_from_name(dom_name);
  85         if (domain == NULL) {
  86                 /* We must delete the old record. */
  87                 DEBUG(0,("Unable to find domain %s\n", dom_name ));
  88                 DEBUG(0,("deleting record %s\n", (const char *)rec->key.dptr ));
  89
  90                 status = rec->delete_rec(rec);
  91                 if (!NT_STATUS_IS_OK(status)) {
  92                         DEBUG(0, ("Unable to delete record %s:%s\n",
  93                                 (const char *)rec->key.dptr,
  94                                 nt_errstr(status)));
  95                         s->failed = true;
  96                         return -1;
  97                 }
  98
  99                 return 0;
 100         }
 101
 102         rid = atoi(p);
 103
 104         sid_compose(&sid, &domain->sid, rid);
 105
 106         sid_to_fstring(keystr, &sid);
 107         key2 = string_term_tdb_data(keystr);
 108
 109         status = dbwrap_store(s->db, key2, rec->value, TDB_INSERT);
 110         if (!NT_STATUS_IS_OK(status)) {
 111                 DEBUG(0,("Unable to add record %s:%s\n",
 112                         (const char *)key2.dptr,
 113                         nt_errstr(status)));
 114                 s->failed = true;
 115                 return -1;
 116         }
 117
 118         status = dbwrap_store(s->db, rec->value, key2, TDB_REPLACE);
 119         if (!NT_STATUS_IS_OK(status)) {
 120                 DEBUG(0,("Unable to update record %s:%s\n",
 121                         (const char *)rec->value.dptr,
 122                         nt_errstr(status)));
 123                 s->failed = true;
 124                 return -1;
 125         }
 126
 127         status = rec->delete_rec(rec);
 128         if (!NT_STATUS_IS_OK(status)) {
 129                 DEBUG(0,("Unable to delete record %s:%s\n",
 130                         (const char *)rec->key.dptr,
 131                         nt_errstr(status)));
 132                 s->failed = true;
 133                 return -1;
 134         }
 135
 136         return 0;
 137 }
 138
 139 /*****************************************************************************
 140  Convert the idmap database from an older version.
 141 *****************************************************************************/
 142
 143 static bool idmap_tdb_upgrade(struct idmap_domain *dom, struct db_context *db)
 144 {
 145         int32 vers;
 146         bool bigendianheader;
 147         struct convert_fn_state s;
 148
 149         DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
 150
 151         bigendianheader = (db->get_flags(db) & TDB_BIGENDIAN) ? True : False;
 152
 153         vers = dbwrap_fetch_int32(db, "IDMAP_VERSION");
 154
 155         if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
 156                 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
 157                 /*
 158                  * high and low records were created on a
 159                  * big endian machine and will need byte-reversing.
 160                  */
 161
 162                 int32 wm;
 163
 164                 wm = dbwrap_fetch_int32(db, HWM_USER);
 165
 166                 if (wm != -1) {
 167                         wm = IREV(wm);
 168                 }  else {
 169                         wm = dom->low_id;
 170                 }
 171
 172                 if (dbwrap_store_int32(db, HWM_USER, wm) == -1) {
 173                         DEBUG(0, ("Unable to byteswap user hwm in idmap database\n"));
 174                         return False;
 175                 }
 176
 177                 wm = dbwrap_fetch_int32(db, HWM_GROUP);
 178                 if (wm != -1) {
 179                         wm = IREV(wm);
 180                 } else {
 181                         wm = dom->low_id;
 182                 }
 183
 184                 if (dbwrap_store_int32(db, HWM_GROUP, wm) == -1) {
 185                         DEBUG(0, ("Unable to byteswap group hwm in idmap database\n"));
 186                         return False;
 187                 }
 188         }
 189
 190         s.db = db;
 191         s.failed = false;
 192
 193         /* the old format stored as DOMAIN/rid - now we store the SID direct */
 194         db->traverse(db, convert_fn, &s);
 195
 196         if (s.failed) {
 197                 DEBUG(0, ("Problem during conversion\n"));
 198                 return False;
 199         }
 200
 201         if (dbwrap_store_int32(db, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
 202                 DEBUG(0, ("Unable to store idmap version in database\n"));
 203                 return False;
 204         }
 205
 206         return True;
 207 }
 208
 209 static NTSTATUS idmap_tdb_init_hwm(struct idmap_domain *dom)
 210 {
 211         int ret;
 212         uint32_t low_uid;
 213         uint32_t low_gid;
 214         bool update_uid = false;
 215         bool update_gid = false;
 216         struct idmap_tdb_context *ctx;
 217
 218         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 219
 220         low_uid = dbwrap_fetch_int32(ctx->db, HWM_USER);
 221         if (low_uid == -1 || low_uid < dom->low_id) {
 222                 update_uid = true;
 223         }
 224
 225         low_gid = dbwrap_fetch_int32(ctx->db, HWM_GROUP);
 226         if (low_gid == -1 || low_gid < dom->low_id) {
 227                 update_gid = true;
 228         }
 229
 230         if (!update_uid && !update_gid) {
 231                 return NT_STATUS_OK;
 232         }
 233
 234         if (ctx->db->transaction_start(ctx->db) != 0) {
 235                 DEBUG(0, ("Unable to start upgrade transaction!\n"));
 236                 return NT_STATUS_INTERNAL_DB_ERROR;
 237         }
 238
 239         if (update_uid) {
 240                 ret = dbwrap_store_int32(ctx->db, HWM_USER, dom->low_id);
 241                 if (ret == -1) {
 242                         ctx->db->transaction_cancel(ctx->db);
 243                         DEBUG(0, ("Unable to initialise user hwm in idmap "
 244                                   "database\n"));
 245                         return NT_STATUS_INTERNAL_DB_ERROR;
 246                 }
 247         }
 248
 249         if (update_gid) {
 250                 ret = dbwrap_store_int32(ctx->db, HWM_GROUP, dom->low_id);
 251                 if (ret == -1) {
 252                         ctx->db->transaction_cancel(ctx->db);
 253                         DEBUG(0, ("Unable to initialise group hwm in idmap "
 254                                   "database\n"));
 255                         return NT_STATUS_INTERNAL_DB_ERROR;
 256                 }
 257         }
 258
 259         if (ctx->db->transaction_commit(ctx->db) != 0) {
 260                 DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 261                 return NT_STATUS_INTERNAL_DB_ERROR;
 262         }
 263
 264         return NT_STATUS_OK;
 265 }
 266
 267 static NTSTATUS idmap_tdb_open_db(struct idmap_domain *dom)
 268 {
 269         NTSTATUS ret;
 270         TALLOC_CTX *mem_ctx;
 271         char *tdbfile = NULL;
 272         struct db_context *db = NULL;
 273         int32_t version;
 274         bool config_error = false;
 275         struct idmap_tdb_context *ctx;
 276
 277         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 278
 279         if (ctx->db) {
 280                 /* it is already open */
 281                 return NT_STATUS_OK;
 282         }
 283
 284         /* use our own context here */
 285         mem_ctx = talloc_stackframe();
 286
 287         /* use the old database if present */
 288         tdbfile = state_path("winbindd_idmap.tdb");
 289         if (!tdbfile) {
 290                 DEBUG(0, ("Out of memory!\n"));
 291                 ret = NT_STATUS_NO_MEMORY;
 292                 goto done;
 293         }
 294
 295         DEBUG(10,("Opening tdbfile %s\n", tdbfile ));
 296
 297         /* Open idmap repository */
 298         db = db_open(mem_ctx, tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644);
 299         if (!db) {
 300                 DEBUG(0, ("Unable to open idmap database\n"));
 301                 ret = NT_STATUS_UNSUCCESSFUL;
 302                 goto done;
 303         }
 304
 305         /* check against earlier versions */
 306         version = dbwrap_fetch_int32(db, "IDMAP_VERSION");
 307         if (version != IDMAP_VERSION) {
 308                 if (config_error) {
 309                         DEBUG(0,("Upgrade of IDMAP_VERSION from %d to %d is not "
 310                                  "possible with incomplete configuration\n",
 311                                  version, IDMAP_VERSION));
 312                         ret = NT_STATUS_UNSUCCESSFUL;
 313                         goto done;
 314                 }
 315                 if (db->transaction_start(db) != 0) {
 316                         DEBUG(0, ("Unable to start upgrade transaction!\n"));
 317                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 318                         goto done;
 319                 }
 320
 321                 if (!idmap_tdb_upgrade(dom, db)) {
 322                         db->transaction_cancel(db);
 323                         DEBUG(0, ("Unable to open idmap database, it's in an old format, and upgrade failed!\n"));
 324                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 325                         goto done;
 326                 }
 327
 328                 if (db->transaction_commit(db) != 0) {
 329                         DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 330                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 331                         goto done;
 332                 }
 333         }
 334
 335         ctx->db = talloc_move(ctx, &db);
 336
 337         ret = idmap_tdb_init_hwm(dom);
 338
 339 done:
 340         talloc_free(mem_ctx);
 341         return ret;
 342 }
 343
 344 /**********************************************************************
 345  IDMAP ALLOC TDB BACKEND
 346 **********************************************************************/
 347
 348 /**********************************
 349  Allocate a new id.
 350 **********************************/
 351
 352 struct idmap_tdb_allocate_id_context {
 353         const char *hwmkey;
 354         const char *hwmtype;
 355         uint32_t high_hwm;
 356         uint32_t hwm;
 357 };
 358
 359 static NTSTATUS idmap_tdb_allocate_id_action(struct db_context *db,
 360                                              void *private_data)
 361 {
 362         NTSTATUS ret;
 363         struct idmap_tdb_allocate_id_context *state;
 364         uint32_t hwm;
 365
 366         state = (struct idmap_tdb_allocate_id_context *)private_data;
 367
 368         hwm = dbwrap_fetch_int32(db, state->hwmkey);
 369         if (hwm == -1) {
 370                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 371                 goto done;
 372         }
 373
 374         /* check it is in the range */
 375         if (hwm > state->high_hwm) {
 376                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 377                           state->hwmtype, (unsigned long)state->high_hwm));
 378                 ret = NT_STATUS_UNSUCCESSFUL;
 379                 goto done;
 380         }
 381
 382         /* fetch a new id and increment it */
 383         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 384         if (!NT_STATUS_IS_OK(ret)) {
 385                 DEBUG(0, ("Fatal error while fetching a new %s value: %s\n!",
 386                           state->hwmtype, nt_errstr(ret)));
 387                 goto done;
 388         }
 389
 390         /* recheck it is in the range */
 391         if (hwm > state->high_hwm) {
 392                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 393                           state->hwmtype, (unsigned long)state->high_hwm));
 394                 ret = NT_STATUS_UNSUCCESSFUL;
 395                 goto done;
 396         }
 397
 398         ret = NT_STATUS_OK;
 399         state->hwm = hwm;
 400
 401 done:
 402         return ret;
 403 }
 404
 405 static NTSTATUS idmap_tdb_allocate_id(struct idmap_domain *dom,
 406                                       struct unixid *xid)
 407 {
 408         const char *hwmkey;
 409         const char *hwmtype;
 410         uint32_t high_hwm;
 411         uint32_t hwm = 0;
 412         NTSTATUS status;
 413         struct idmap_tdb_allocate_id_context state;
 414         struct idmap_tdb_context *ctx;
 415
 416         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 417
 418         /* Get current high water mark */
 419         switch (xid->type) {
 420
 421         case ID_TYPE_UID:
 422                 hwmkey = HWM_USER;
 423                 hwmtype = "UID";
 424                 break;
 425
 426         case ID_TYPE_GID:
 427                 hwmkey = HWM_GROUP;
 428                 hwmtype = "GID";
 429                 break;
 430
 431         default:
 432                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 433                 return NT_STATUS_INVALID_PARAMETER;
 434         }
 435
 436         high_hwm = dom->high_id;
 437
 438         state.hwm = hwm;
 439         state.high_hwm = high_hwm;
 440         state.hwmtype = hwmtype;
 441         state.hwmkey = hwmkey;
 442
 443         status = dbwrap_trans_do(ctx->db, idmap_tdb_allocate_id_action,
 444                                  &state);
 445
 446         if (NT_STATUS_IS_OK(status)) {
 447                 xid->id = state.hwm;
 448                 DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
 449         } else {
 450                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 451         }
 452
 453         return status;
 454 }
 455
 456 /**
 457  * Allocate a new unix-ID.
 458  * For now this is for the default idmap domain only.
 459  * Should be extended later on.
 460  */
 461 static NTSTATUS idmap_tdb_get_new_id(struct idmap_domain *dom,
 462                                      struct unixid *id)
 463 {
 464         NTSTATUS ret;
 465
 466         if (!strequal(dom->name, "*")) {
 467                 DEBUG(3, ("idmap_tdb_get_new_id: "
 468                           "Refusing allocation of a new unixid for domain'%s'. "
 469                           "Currently only supported for the default "
 470                           "domain \"*\".\n",
 471                            dom->name));
 472                 return NT_STATUS_NOT_IMPLEMENTED;
 473         }
 474
 475         ret = idmap_tdb_allocate_id(dom, id);
 476
 477         return ret;
 478 }
 479
 480 /**********************************************************************
 481  IDMAP MAPPING TDB BACKEND
 482 **********************************************************************/
 483
 484 /*****************************
 485  Initialise idmap database.
 486 *****************************/
 487
 488 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 489                                       const struct id_map *map);
 490
 491 static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom)
 492 {
 493         NTSTATUS ret;
 494         struct idmap_tdb_context *ctx;
 495
 496         DEBUG(10, ("idmap_tdb_db_init called for domain '%s'\n", dom->name));
 497
 498         ctx = talloc_zero(dom, struct idmap_tdb_context);
 499         if ( ! ctx) {
 500                 DEBUG(0, ("Out of memory!\n"));
 501                 return NT_STATUS_NO_MEMORY;
 502         }
 503
 504         /* load backend specific configuration here: */
 505 #if 0
 506         if (strequal(dom->name, "*")) {
 507         } else {
 508         }
 509 #endif
 510
 511         ctx->rw_ops = talloc_zero(ctx, struct idmap_rw_ops);
 512         if (ctx->rw_ops == NULL) {
 513                 DEBUG(0, ("Out of memory!\n"));
 514                 ret = NT_STATUS_NO_MEMORY;
 515                 goto failed;
 516         }
 517
 518         ctx->rw_ops->get_new_id = idmap_tdb_get_new_id;
 519         ctx->rw_ops->set_mapping = idmap_tdb_set_mapping;
 520
 521         dom->private_data = ctx;
 522
 523         ret = idmap_tdb_open_db(dom);
 524         if ( ! NT_STATUS_IS_OK(ret)) {
 525                 goto failed;
 526         }
 527
 528         return NT_STATUS_OK;
 529
 530 failed:
 531         talloc_free(ctx);
 532         return ret;
 533 }
 534
 535
 536 /**
 537  * store a mapping in the database
 538  */
 539
 540 struct idmap_tdb_set_mapping_context {
 541         const char *ksidstr;
 542         const char *kidstr;
 543 };
 544
 545 static NTSTATUS idmap_tdb_set_mapping_action(struct db_context *db,
 546                                              void *private_data)
 547 {
 548         NTSTATUS ret;
 549         struct idmap_tdb_set_mapping_context *state;
 550
 551         state = (struct idmap_tdb_set_mapping_context *)private_data;
 552
 553         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 554
 555         ret = dbwrap_store_bystring(db, state->ksidstr,
 556                                     string_term_tdb_data(state->kidstr),
 557                                     TDB_REPLACE);
 558         if (!NT_STATUS_IS_OK(ret)) {
 559                 DEBUG(0, ("Error storing SID -> ID (%s -> %s): %s\n",
 560                           state->ksidstr, state->kidstr, nt_errstr(ret)));
 561                 goto done;
 562         }
 563
 564         ret = dbwrap_store_bystring(db, state->kidstr,
 565                                     string_term_tdb_data(state->ksidstr),
 566                                     TDB_REPLACE);
 567         if (!NT_STATUS_IS_OK(ret)) {
 568                 DEBUG(0, ("Error storing ID -> SID (%s -> %s): %s\n",
 569                           state->kidstr, state->ksidstr, nt_errstr(ret)));
 570                 goto done;
 571         }
 572
 573         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 574         ret = NT_STATUS_OK;
 575
 576 done:
 577         return ret;
 578 }
 579
 580 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 581                                       const struct id_map *map)
 582 {
 583         struct idmap_tdb_context *ctx;
 584         NTSTATUS ret;
 585         char *ksidstr, *kidstr;
 586         struct idmap_tdb_set_mapping_context state;
 587
 588         if (!map || !map->sid) {
 589                 return NT_STATUS_INVALID_PARAMETER;
 590         }
 591
 592         ksidstr = kidstr = NULL;
 593
 594         /* TODO: should we filter a set_mapping using low/high filters ? */
 595
 596         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 597
 598         switch (map->xid.type) {
 599
 600         case ID_TYPE_UID:
 601                 kidstr = talloc_asprintf(ctx, "UID %lu",
 602                                          (unsigned long)map->xid.id);
 603                 break;
 604
 605         case ID_TYPE_GID:
 606                 kidstr = talloc_asprintf(ctx, "GID %lu",
 607                                          (unsigned long)map->xid.id);
 608                 break;
 609
 610         default:
 611                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 612                 return NT_STATUS_INVALID_PARAMETER;
 613         }
 614
 615         if (kidstr == NULL) {
 616                 DEBUG(0, ("ERROR: Out of memory!\n"));
 617                 ret = NT_STATUS_NO_MEMORY;
 618                 goto done;
 619         }
 620
 621         ksidstr = sid_string_talloc(ctx, map->sid);
 622         if (ksidstr == NULL) {
 623                 DEBUG(0, ("Out of memory!\n"));
 624                 ret = NT_STATUS_NO_MEMORY;
 625                 goto done;
 626         }
 627
 628         state.ksidstr = ksidstr;
 629         state.kidstr = kidstr;
 630
 631         ret = dbwrap_trans_do(ctx->db, idmap_tdb_set_mapping_action, &state);
 632
 633 done:
 634         talloc_free(ksidstr);
 635         talloc_free(kidstr);
 636         return ret;
 637 }
 638
 639 /**
 640  * Create a new mapping for an unmapped SID, also allocating a new ID.
 641  * This should be run inside a transaction.
 642  *
 643  * TODO:
 644  * Properly integrate this with multi domain idmap config:
 645  * Currently, the allocator is default-config only.
 646  */
 647 static NTSTATUS idmap_tdb_new_mapping(struct idmap_domain *dom, struct id_map *map)
 648 {
 649         NTSTATUS ret;
 650         struct idmap_tdb_context *ctx;
 651
 652         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 653
 654         ret = idmap_rw_new_mapping(dom, ctx->rw_ops, map);
 655
 656         return ret;
 657 }
 658
 659
 660 /**********************************
 661  Single id to sid lookup function.
 662 **********************************/
 663
 664 static NTSTATUS idmap_tdb_id_to_sid(struct idmap_domain *dom, struct id_map *map)
 665 {
 666         NTSTATUS ret;
 667         TDB_DATA data;
 668         char *keystr;
 669         struct idmap_tdb_context *ctx;
 670
 671         if (!dom || !map) {
 672                 return NT_STATUS_INVALID_PARAMETER;
 673         }
 674
 675         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 676
 677         /* apply filters before checking */
 678         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 679                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 680                                 map->xid.id, dom->low_id, dom->high_id));
 681                 return NT_STATUS_NONE_MAPPED;
 682         }
 683
 684         switch (map->xid.type) {
 685
 686         case ID_TYPE_UID:
 687                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 688                 break;
 689
 690         case ID_TYPE_GID:
 691                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 692                 break;
 693
 694         default:
 695                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 696                 return NT_STATUS_INVALID_PARAMETER;
 697         }
 698
 699         /* final SAFE_FREE safe */
 700         data.dptr = NULL;
 701
 702         if (keystr == NULL) {
 703                 DEBUG(0, ("Out of memory!\n"));
 704                 ret = NT_STATUS_NO_MEMORY;
 705                 goto done;
 706         }
 707
 708         DEBUG(10,("Fetching record %s\n", keystr));
 709
 710         /* Check if the mapping exists */
 711         data = dbwrap_fetch_bystring(ctx->db, NULL, keystr);
 712
 713         if (!data.dptr) {
 714                 DEBUG(10,("Record %s not found\n", keystr));
 715                 ret = NT_STATUS_NONE_MAPPED;
 716                 goto done;
 717         }
 718
 719         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 720                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 721                         (const char *)data.dptr, keystr));
 722                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 723                 goto done;
 724         }
 725
 726         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 727         ret = NT_STATUS_OK;
 728
 729 done:
 730         talloc_free(data.dptr);
 731         talloc_free(keystr);
 732         return ret;
 733 }
 734
 735 /**********************************
 736  Single sid to id lookup function.
 737 **********************************/
 738
 739 static NTSTATUS idmap_tdb_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 740 {
 741         NTSTATUS ret;
 742         TDB_DATA data;
 743         char *keystr;
 744         unsigned long rec_id = 0;
 745         struct idmap_tdb_context *ctx;
 746         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 747
 748         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 749
 750         keystr = sid_string_talloc(tmp_ctx, map->sid);
 751         if (keystr == NULL) {
 752                 DEBUG(0, ("Out of memory!\n"));
 753                 ret = NT_STATUS_NO_MEMORY;
 754                 goto done;
 755         }
 756
 757         DEBUG(10,("Fetching record %s\n", keystr));
 758
 759         /* Check if sid is present in database */
 760         data = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr);
 761         if (!data.dptr) {
 762                 DEBUG(10,("Record %s not found\n", keystr));
 763                 ret = NT_STATUS_NONE_MAPPED;
 764                 goto done;
 765         }
 766
 767         /* What type of record is this ? */
 768         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 769                 map->xid.id = rec_id;
 770                 map->xid.type = ID_TYPE_UID;
 771                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 772                 ret = NT_STATUS_OK;
 773
 774         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 775                 map->xid.id = rec_id;
 776                 map->xid.type = ID_TYPE_GID;
 777                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 778                 ret = NT_STATUS_OK;
 779
 780         } else { /* Unknown record type ! */
 781                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 782                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 783                 goto done;
 784         }
 785
 786         /* apply filters before returning result */
 787         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 788                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 789                                 map->xid.id, dom->low_id, dom->high_id));
 790                 ret = NT_STATUS_NONE_MAPPED;
 791         }
 792
 793 done:
 794         talloc_free(tmp_ctx);
 795         return ret;
 796 }
 797
 798 /**********************************
 799  lookup a set of unix ids.
 800 **********************************/
 801
 802 static NTSTATUS idmap_tdb_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 803 {
 804         NTSTATUS ret;
 805         int i;
 806
 807         /* initialize the status to avoid suprise */
 808         for (i = 0; ids[i]; i++) {
 809                 ids[i]->status = ID_UNKNOWN;
 810         }
 811
 812         for (i = 0; ids[i]; i++) {
 813                 ret = idmap_tdb_id_to_sid(dom, ids[i]);
 814                 if ( ! NT_STATUS_IS_OK(ret)) {
 815
 816                         /* if it is just a failed mapping continue */
 817                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 818
 819                                 /* make sure it is marked as unmapped */
 820                                 ids[i]->status = ID_UNMAPPED;
 821                                 continue;
 822                         }
 823
 824                         /* some fatal error occurred, return immediately */
 825                         goto done;
 826                 }
 827
 828                 /* all ok, id is mapped */
 829                 ids[i]->status = ID_MAPPED;
 830         }
 831
 832         ret = NT_STATUS_OK;
 833
 834 done:
 835         return ret;
 836 }
 837
 838 /**********************************
 839  lookup a set of sids.
 840 **********************************/
 841
 842 struct idmap_tdb_sids_to_unixids_context {
 843         struct idmap_domain *dom;
 844         struct id_map **ids;
 845         bool allocate_unmapped;
 846 };
 847
 848 static NTSTATUS idmap_tdb_sids_to_unixids_action(struct db_context *db,
 849                                                  void *private_data)
 850 {
 851         struct idmap_tdb_sids_to_unixids_context *state;
 852         int i;
 853         NTSTATUS ret = NT_STATUS_OK;
 854
 855         state = (struct idmap_tdb_sids_to_unixids_context *)private_data;
 856
 857         DEBUG(10, ("idmap_tdb_sids_to_unixids_action: "
 858                    " domain: [%s], allocate: %s\n",
 859                    state->dom->name,
 860                    state->allocate_unmapped ? "yes" : "no"));
 861
 862         for (i = 0; state->ids[i]; i++) {
 863                 if ((state->ids[i]->status == ID_UNKNOWN) ||
 864                     /* retry if we could not map in previous run: */
 865                     (state->ids[i]->status == ID_UNMAPPED))
 866                 {
 867                         NTSTATUS ret2;
 868
 869                         ret2 = idmap_tdb_sid_to_id(state->dom, state->ids[i]);
 870                         if (!NT_STATUS_IS_OK(ret2)) {
 871
 872                                 /* if it is just a failed mapping, continue */
 873                                 if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
 874
 875                                         /* make sure it is marked as unmapped */
 876                                         state->ids[i]->status = ID_UNMAPPED;
 877                                         ret = STATUS_SOME_UNMAPPED;
 878                                 } else {
 879                                         /* some fatal error occurred, return immediately */
 880                                         ret = ret2;
 881                                         goto done;
 882                                 }
 883                         } else {
 884                                 /* all ok, id is mapped */
 885                                 state->ids[i]->status = ID_MAPPED;
 886                         }
 887                 }
 888
 889                 if ((state->ids[i]->status == ID_UNMAPPED) &&
 890                     state->allocate_unmapped)
 891                 {
 892                         ret = idmap_tdb_new_mapping(state->dom, state->ids[i]);
 893                         if (!NT_STATUS_IS_OK(ret)) {
 894                                 goto done;
 895                         }
 896                 }
 897         }
 898
 899 done:
 900         return ret;
 901 }
 902
 903 static NTSTATUS idmap_tdb_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 904 {
 905         struct idmap_tdb_context *ctx;
 906         NTSTATUS ret;
 907         int i;
 908         struct idmap_tdb_sids_to_unixids_context state;
 909
 910         /* initialize the status to avoid suprise */
 911         for (i = 0; ids[i]; i++) {
 912                 ids[i]->status = ID_UNKNOWN;
 913         }
 914
 915         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 916
 917         state.dom = dom;
 918         state.ids = ids;
 919         state.allocate_unmapped = false;
 920
 921         ret = idmap_tdb_sids_to_unixids_action(ctx->db, &state);
 922
 923         if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) && !dom->read_only) {
 924                 state.allocate_unmapped = true;
 925                 ret = dbwrap_trans_do(ctx->db,
 926                                       idmap_tdb_sids_to_unixids_action,
 927                                       &state);
 928         }
 929
 930         return ret;
 931 }
 932
 933
 934 /**********************************
 935  Close the idmap tdb instance
 936 **********************************/
 937
 938 static struct idmap_methods db_methods = {
 939         .init = idmap_tdb_db_init,
 940         .unixids_to_sids = idmap_tdb_unixids_to_sids,
 941         .sids_to_unixids = idmap_tdb_sids_to_unixids,
 942         .allocate_id = idmap_tdb_get_new_id,
 943 };
 944
 945 NTSTATUS idmap_tdb_init(void)
 946 {
 947         DEBUG(10, ("calling idmap_tdb_init\n"));
 948
 949         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
 950 }