source3/winbindd/idmap_tdb2.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    idmap TDB2 backend, used for clustered Samba setups.
   5
   6    This uses dbwrap to access tdb files. The location can be set
   7    using tdb:idmap2.tdb =" in smb.conf
   8
   9    Copyright (C) Andrew Tridgell 2007
  10
  11    This is heavily based upon idmap_tdb.c, which is:
  12
  13    Copyright (C) Tim Potter 2000
  14    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
  15    Copyright (C) Jeremy Allison 2006
  16    Copyright (C) Simo Sorce 2003-2006
  17    Copyright (C) Michael Adam 2009-2010
  18
  19    This program is free software; you can redistribute it and/or modify
  20    it under the terms of the GNU General Public License as published by
  21    the Free Software Foundation; either version 2 of the License, or
  22    (at your option) any later version.
  23
  24    This program is distributed in the hope that it will be useful,
  25    but WITHOUT ANY WARRANTY; without even the implied warranty of
  26    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27    GNU General Public License for more details.
  28
  29    You should have received a copy of the GNU General Public License
  30    along with this program; if not, write to the Free Software
  31    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  32 */
  33
  34 #include "includes.h"
  35 #include "system/filesys.h"
  36 #include "winbindd.h"
  37 #include "idmap.h"
  38 #include "idmap_rw.h"
  39 #include "dbwrap.h"
  40 #include "../libcli/security/dom_sid.h"
  41 #include "util_tdb.h"
  42
  43 #undef DBGC_CLASS
  44 #define DBGC_CLASS DBGC_IDMAP
  45
  46 struct idmap_tdb2_context {
  47         struct db_context *db;
  48         const char *script; /* script to provide idmaps */
  49         struct idmap_rw_ops *rw_ops;
  50 };
  51
  52 /* High water mark keys */
  53 #define HWM_GROUP  "GROUP HWM"
  54 #define HWM_USER   "USER HWM"
  55
  56
  57 /*
  58  * check and initialize high/low water marks in the db
  59  */
  60 static NTSTATUS idmap_tdb2_init_hwm(struct idmap_domain *dom)
  61 {
  62         NTSTATUS status;
  63         uint32 low_id;
  64         struct idmap_tdb2_context *ctx;
  65
  66         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
  67
  68         /* Create high water marks for group and user id */
  69
  70         low_id = dbwrap_fetch_int32(ctx->db, HWM_USER);
  71         if ((low_id == -1) || (low_id < dom->low_id)) {
  72                 status = dbwrap_trans_store_int32(ctx->db, HWM_USER,
  73                                                   dom->low_id);
  74                 if (!NT_STATUS_IS_OK(status)) {
  75                         DEBUG(0, ("Unable to initialise user hwm in idmap "
  76                                   "database: %s\n", nt_errstr(status)));
  77                         return NT_STATUS_INTERNAL_DB_ERROR;
  78                 }
  79         }
  80
  81         low_id = dbwrap_fetch_int32(ctx->db, HWM_GROUP);
  82         if ((low_id == -1) || (low_id < dom->low_id)) {
  83                 status = dbwrap_trans_store_int32(ctx->db, HWM_GROUP,
  84                                                   dom->low_id);
  85                 if (!NT_STATUS_IS_OK(status)) {
  86                         DEBUG(0, ("Unable to initialise group hwm in idmap "
  87                                   "database: %s\n", nt_errstr(status)));
  88                         return NT_STATUS_INTERNAL_DB_ERROR;
  89                 }
  90         }
  91
  92         return NT_STATUS_OK;
  93 }
  94
  95
  96 /*
  97   open the permanent tdb
  98  */
  99 static NTSTATUS idmap_tdb2_open_db(struct idmap_domain *dom)
 100 {
 101         char *db_path;
 102         struct idmap_tdb2_context *ctx;
 103
 104         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 105
 106         if (ctx->db) {
 107                 /* its already open */
 108                 return NT_STATUS_OK;
 109         }
 110
 111         db_path = lp_parm_talloc_string(-1, "tdb", "idmap2.tdb", NULL);
 112         if (db_path == NULL) {
 113                 /* fall back to the private directory, which, despite
 114                    its name, is usually on shared storage */
 115                 db_path = talloc_asprintf(NULL, "%s/idmap2.tdb", lp_private_dir());
 116         }
 117         NT_STATUS_HAVE_NO_MEMORY(db_path);
 118
 119         /* Open idmap repository */
 120         ctx->db = db_open(ctx, db_path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0644);
 121         TALLOC_FREE(db_path);
 122
 123         if (ctx->db == NULL) {
 124                 DEBUG(0, ("Unable to open idmap_tdb2 database '%s'\n",
 125                           db_path));
 126                 return NT_STATUS_UNSUCCESSFUL;
 127         }
 128
 129         return idmap_tdb2_init_hwm(dom);
 130 }
 131
 132
 133 /*
 134   Allocate a new id.
 135 */
 136
 137 struct idmap_tdb2_allocate_id_context {
 138         const char *hwmkey;
 139         const char *hwmtype;
 140         uint32_t high_hwm;
 141         uint32_t hwm;
 142 };
 143
 144 static NTSTATUS idmap_tdb2_allocate_id_action(struct db_context *db,
 145                                               void *private_data)
 146 {
 147         NTSTATUS ret;
 148         struct idmap_tdb2_allocate_id_context *state;
 149         uint32_t hwm;
 150
 151         state = (struct idmap_tdb2_allocate_id_context *)private_data;
 152
 153         hwm = dbwrap_fetch_int32(db, state->hwmkey);
 154         if (hwm == -1) {
 155                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 156                 goto done;
 157         }
 158
 159         /* check it is in the range */
 160         if (hwm > state->high_hwm) {
 161                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 162                           state->hwmtype, (unsigned long)state->high_hwm));
 163                 ret = NT_STATUS_UNSUCCESSFUL;
 164                 goto done;
 165         }
 166
 167         /* fetch a new id and increment it */
 168         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 169         if (!NT_STATUS_IS_OK(ret)) {
 170                 DEBUG(1, ("Fatal error while fetching a new %s value\n!",
 171                           state->hwmtype));
 172                 goto done;
 173         }
 174
 175         /* recheck it is in the range */
 176         if (hwm > state->high_hwm) {
 177                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 178                           state->hwmtype, (unsigned long)state->high_hwm));
 179                 ret = NT_STATUS_UNSUCCESSFUL;
 180                 goto done;
 181         }
 182
 183         ret = NT_STATUS_OK;
 184         state->hwm = hwm;
 185
 186 done:
 187         return ret;
 188 }
 189
 190 static NTSTATUS idmap_tdb2_allocate_id(struct idmap_domain *dom,
 191                                        struct unixid *xid)
 192 {
 193         const char *hwmkey;
 194         const char *hwmtype;
 195         uint32_t high_hwm;
 196         uint32_t hwm = 0;
 197         NTSTATUS status;
 198         struct idmap_tdb2_allocate_id_context state;
 199         struct idmap_tdb2_context *ctx;
 200
 201         status = idmap_tdb2_open_db(dom);
 202         NT_STATUS_NOT_OK_RETURN(status);
 203
 204         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 205
 206         /* Get current high water mark */
 207         switch (xid->type) {
 208
 209         case ID_TYPE_UID:
 210                 hwmkey = HWM_USER;
 211                 hwmtype = "UID";
 212                 break;
 213
 214         case ID_TYPE_GID:
 215                 hwmkey = HWM_GROUP;
 216                 hwmtype = "GID";
 217                 break;
 218
 219         default:
 220                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 221                 return NT_STATUS_INVALID_PARAMETER;
 222         }
 223
 224         high_hwm = dom->high_id;
 225
 226         state.hwm = hwm;
 227         state.high_hwm = high_hwm;
 228         state.hwmtype = hwmtype;
 229         state.hwmkey = hwmkey;
 230
 231         status = dbwrap_trans_do(ctx->db, idmap_tdb2_allocate_id_action,
 232                                  &state);
 233
 234         if (NT_STATUS_IS_OK(status)) {
 235                 xid->id = state.hwm;
 236                 DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
 237         } else {
 238                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 239         }
 240
 241         return status;
 242 }
 243
 244 /**
 245  * Allocate a new unix-ID.
 246  * For now this is for the default idmap domain only.
 247  * Should be extended later on.
 248  */
 249 static NTSTATUS idmap_tdb2_get_new_id(struct idmap_domain *dom,
 250                                       struct unixid *id)
 251 {
 252         NTSTATUS ret;
 253
 254         if (!strequal(dom->name, "*")) {
 255                 DEBUG(3, ("idmap_tdb2_get_new_id: "
 256                           "Refusing creation of mapping for domain'%s'. "
 257                           "Currently only supported for the default "
 258                           "domain \"*\".\n",
 259                            dom->name));
 260                 return NT_STATUS_NOT_IMPLEMENTED;
 261         }
 262
 263         ret = idmap_tdb2_allocate_id(dom, id);
 264
 265         return ret;
 266 }
 267
 268 /*
 269   IDMAP MAPPING TDB BACKEND
 270 */
 271
 272 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom,
 273                                        const struct id_map *map);
 274
 275 /*
 276   Initialise idmap database.
 277 */
 278 static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom)
 279 {
 280         NTSTATUS ret;
 281         struct idmap_tdb2_context *ctx;
 282
 283         ctx = talloc_zero(dom, struct idmap_tdb2_context);
 284         if ( ! ctx) {
 285                 DEBUG(0, ("Out of memory!\n"));
 286                 return NT_STATUS_NO_MEMORY;
 287         }
 288
 289         if (strequal(dom->name, "*")) {
 290                 ctx->script = lp_parm_const_string(-1, "idmap", "script", NULL);
 291                 if (ctx->script) {
 292                         DEBUG(1, ("using idmap script '%s'\n", ctx->script));
 293                 }
 294         } else {
 295                 char *config_option = NULL;
 296
 297                 config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 298                 if ( ! config_option) {
 299                         DEBUG(0, ("Out of memory!\n"));
 300                         ret = NT_STATUS_NO_MEMORY;
 301                         goto failed;
 302                 }
 303
 304                 ctx->script = lp_parm_const_string(-1, config_option, "script", NULL);
 305                 if (ctx->script) {
 306                         DEBUG(1, ("using idmap script '%s'\n", ctx->script));
 307                 }
 308
 309                 talloc_free(config_option);
 310         }
 311
 312         ctx->rw_ops = talloc_zero(ctx, struct idmap_rw_ops);
 313         if (ctx->rw_ops == NULL) {
 314                 DEBUG(0, ("Out of memory!\n"));
 315                 ret = NT_STATUS_NO_MEMORY;
 316                 goto failed;
 317         }
 318
 319         ctx->rw_ops->get_new_id = idmap_tdb2_get_new_id;
 320         ctx->rw_ops->set_mapping = idmap_tdb2_set_mapping;
 321
 322         dom->private_data = ctx;
 323
 324         ret = idmap_tdb2_open_db(dom);
 325         if (!NT_STATUS_IS_OK(ret)) {
 326                 goto failed;
 327         }
 328
 329         return NT_STATUS_OK;
 330
 331 failed:
 332         talloc_free(ctx);
 333         return ret;
 334 }
 335
 336
 337 /**
 338  * store a mapping in the database.
 339  */
 340
 341 struct idmap_tdb2_set_mapping_context {
 342         const char *ksidstr;
 343         const char *kidstr;
 344 };
 345
 346 static NTSTATUS idmap_tdb2_set_mapping_action(struct db_context *db,
 347                                               void *private_data)
 348 {
 349         TDB_DATA data;
 350         NTSTATUS ret;
 351         struct idmap_tdb2_set_mapping_context *state;
 352         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 353
 354         state = (struct idmap_tdb2_set_mapping_context *)private_data;
 355
 356         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 357
 358         /* check wheter sid mapping is already present in db */
 359         data = dbwrap_fetch_bystring(db, tmp_ctx, state->ksidstr);
 360         if (data.dptr) {
 361                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 362                 goto done;
 363         }
 364
 365         ret = dbwrap_store_bystring(db, state->ksidstr,
 366                                     string_term_tdb_data(state->kidstr),
 367                                     TDB_INSERT);
 368         if (!NT_STATUS_IS_OK(ret)) {
 369                 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
 370                 goto done;
 371         }
 372
 373         ret = dbwrap_store_bystring(db, state->kidstr,
 374                                     string_term_tdb_data(state->ksidstr),
 375                                     TDB_INSERT);
 376         if (!NT_STATUS_IS_OK(ret)) {
 377                 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
 378                 /* try to remove the previous stored SID -> ID map */
 379                 dbwrap_delete_bystring(db, state->ksidstr);
 380                 goto done;
 381         }
 382
 383         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 384
 385 done:
 386         talloc_free(tmp_ctx);
 387         return ret;
 388 }
 389
 390 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 391 {
 392         struct idmap_tdb2_context *ctx;
 393         NTSTATUS ret;
 394         char *ksidstr, *kidstr;
 395         struct idmap_tdb2_set_mapping_context state;
 396
 397         if (!map || !map->sid) {
 398                 return NT_STATUS_INVALID_PARAMETER;
 399         }
 400
 401         ksidstr = kidstr = NULL;
 402
 403         /* TODO: should we filter a set_mapping using low/high filters ? */
 404
 405         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 406
 407         switch (map->xid.type) {
 408
 409         case ID_TYPE_UID:
 410                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 411                 break;
 412
 413         case ID_TYPE_GID:
 414                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 415                 break;
 416
 417         default:
 418                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 419                 return NT_STATUS_INVALID_PARAMETER;
 420         }
 421
 422         if (kidstr == NULL) {
 423                 DEBUG(0, ("ERROR: Out of memory!\n"));
 424                 ret = NT_STATUS_NO_MEMORY;
 425                 goto done;
 426         }
 427
 428         ksidstr = sid_string_talloc(ctx, map->sid);
 429         if (ksidstr == NULL) {
 430                 DEBUG(0, ("Out of memory!\n"));
 431                 ret = NT_STATUS_NO_MEMORY;
 432                 goto done;
 433         }
 434
 435         state.ksidstr = ksidstr;
 436         state.kidstr = kidstr;
 437
 438         ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 439                               &state);
 440
 441 done:
 442         talloc_free(ksidstr);
 443         talloc_free(kidstr);
 444         return ret;
 445 }
 446
 447 /**
 448  * Create a new mapping for an unmapped SID, also allocating a new ID.
 449  * This should be run inside a transaction.
 450  *
 451  * TODO:
 452 *  Properly integrate this with multi domain idmap config:
 453  * Currently, the allocator is default-config only.
 454  */
 455 static NTSTATUS idmap_tdb2_new_mapping(struct idmap_domain *dom, struct id_map *map)
 456 {
 457         NTSTATUS ret;
 458         struct idmap_tdb2_context *ctx;
 459
 460         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 461
 462         ret = idmap_rw_new_mapping(dom, ctx->rw_ops, map);
 463
 464         return ret;
 465 }
 466
 467
 468 /*
 469   run a script to perform a mapping
 470
 471   The script should the following command lines:
 472
 473       SIDTOID S-1-xxxx
 474       IDTOSID UID xxxx
 475       IDTOSID GID xxxx
 476
 477   and should return one of the following as a single line of text
 478      UID:xxxx
 479      GID:xxxx
 480      SID:xxxx
 481      ERR:xxxx
 482  */
 483 static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
 484                                   const char *fmt, ...)
 485 {
 486         va_list ap;
 487         char *cmd;
 488         FILE *p;
 489         char line[64];
 490         unsigned long v;
 491
 492         cmd = talloc_asprintf(ctx, "%s ", ctx->script);
 493         NT_STATUS_HAVE_NO_MEMORY(cmd);
 494
 495         va_start(ap, fmt);
 496         cmd = talloc_vasprintf_append(cmd, fmt, ap);
 497         va_end(ap);
 498         NT_STATUS_HAVE_NO_MEMORY(cmd);
 499
 500         p = popen(cmd, "r");
 501         talloc_free(cmd);
 502         if (p == NULL) {
 503                 return NT_STATUS_NONE_MAPPED;
 504         }
 505
 506         if (fgets(line, sizeof(line)-1, p) == NULL) {
 507                 pclose(p);
 508                 return NT_STATUS_NONE_MAPPED;
 509         }
 510         pclose(p);
 511
 512         DEBUG(10,("idmap script gave: %s\n", line));
 513
 514         if (sscanf(line, "UID:%lu", &v) == 1) {
 515                 map->xid.id   = v;
 516                 map->xid.type = ID_TYPE_UID;
 517         } else if (sscanf(line, "GID:%lu", &v) == 1) {
 518                 map->xid.id   = v;
 519                 map->xid.type = ID_TYPE_GID;
 520         } else if (strncmp(line, "SID:S-", 6) == 0) {
 521                 if (!string_to_sid(map->sid, &line[4])) {
 522                         DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
 523                                  line, ctx->script));
 524                         return NT_STATUS_NONE_MAPPED;
 525                 }
 526         } else {
 527                 DEBUG(0,("Bad reply '%s' from idmap script %s\n",
 528                          line, ctx->script));
 529                 return NT_STATUS_NONE_MAPPED;
 530         }
 531
 532         return NT_STATUS_OK;
 533 }
 534
 535
 536
 537 /*
 538   Single id to sid lookup function.
 539 */
 540 static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_domain *dom, struct id_map *map)
 541 {
 542         NTSTATUS ret;
 543         TDB_DATA data;
 544         char *keystr;
 545         NTSTATUS status;
 546         struct idmap_tdb2_context *ctx;
 547
 548
 549         if (!dom || !map) {
 550                 return NT_STATUS_INVALID_PARAMETER;
 551         }
 552
 553         status = idmap_tdb2_open_db(dom);
 554         NT_STATUS_NOT_OK_RETURN(status);
 555
 556         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 557
 558         /* apply filters before checking */
 559         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 560                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 561                                 map->xid.id, dom->low_id, dom->high_id));
 562                 return NT_STATUS_NONE_MAPPED;
 563         }
 564
 565         switch (map->xid.type) {
 566
 567         case ID_TYPE_UID:
 568                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 569                 break;
 570
 571         case ID_TYPE_GID:
 572                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 573                 break;
 574
 575         default:
 576                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 577                 return NT_STATUS_INVALID_PARAMETER;
 578         }
 579
 580         /* final SAFE_FREE safe */
 581         data.dptr = NULL;
 582
 583         if (keystr == NULL) {
 584                 DEBUG(0, ("Out of memory!\n"));
 585                 ret = NT_STATUS_NO_MEMORY;
 586                 goto done;
 587         }
 588
 589         DEBUG(10,("Fetching record %s\n", keystr));
 590
 591         /* Check if the mapping exists */
 592         data = dbwrap_fetch_bystring(ctx->db, keystr, keystr);
 593
 594         if (!data.dptr) {
 595                 char *sidstr;
 596                 struct idmap_tdb2_set_mapping_context store_state;
 597
 598                 DEBUG(10,("Record %s not found\n", keystr));
 599                 if (ctx->script == NULL) {
 600                         ret = NT_STATUS_NONE_MAPPED;
 601                         goto done;
 602                 }
 603
 604                 ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
 605
 606                 /* store it on shared storage */
 607                 if (!NT_STATUS_IS_OK(ret)) {
 608                         goto done;
 609                 }
 610
 611                 sidstr = sid_string_talloc(keystr, map->sid);
 612                 if (!sidstr) {
 613                         ret = NT_STATUS_NO_MEMORY;
 614                         goto done;
 615                 }
 616
 617                 store_state.ksidstr = sidstr;
 618                 store_state.kidstr = keystr;
 619
 620                 ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 621                                       &store_state);
 622                 goto done;
 623         }
 624
 625         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 626                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 627                         (const char *)data.dptr, keystr));
 628                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 629                 goto done;
 630         }
 631
 632         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 633         ret = NT_STATUS_OK;
 634
 635 done:
 636         talloc_free(keystr);
 637         return ret;
 638 }
 639
 640
 641 /*
 642  Single sid to id lookup function.
 643 */
 644 static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 645 {
 646         NTSTATUS ret;
 647         TDB_DATA data;
 648         char *keystr;
 649         unsigned long rec_id = 0;
 650         struct idmap_tdb2_context *ctx;
 651         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 652
 653         ret = idmap_tdb2_open_db(dom);
 654         NT_STATUS_NOT_OK_RETURN(ret);
 655
 656         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 657
 658         keystr = sid_string_talloc(tmp_ctx, map->sid);
 659         if (keystr == NULL) {
 660                 DEBUG(0, ("Out of memory!\n"));
 661                 ret = NT_STATUS_NO_MEMORY;
 662                 goto done;
 663         }
 664
 665         DEBUG(10,("Fetching record %s\n", keystr));
 666
 667         /* Check if sid is present in database */
 668         data = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr);
 669         if (!data.dptr) {
 670                 char *idstr;
 671                 struct idmap_tdb2_set_mapping_context store_state;
 672
 673                 DEBUG(10,(__location__ " Record %s not found\n", keystr));
 674
 675                 if (ctx->script == NULL) {
 676                         ret = NT_STATUS_NONE_MAPPED;
 677                         goto done;
 678                 }
 679
 680                 ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
 681                 /* store it on shared storage */
 682                 if (!NT_STATUS_IS_OK(ret)) {
 683                         goto done;
 684                 }
 685
 686                 /* apply filters before returning result */
 687                 if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 688                         DEBUG(5, ("Script returned id (%u) out of range "
 689                                   "(%u - %u). Filtered!\n",
 690                                   map->xid.id, dom->low_id, dom->high_id));
 691                         ret = NT_STATUS_NONE_MAPPED;
 692                         goto done;
 693                 }
 694
 695                 idstr = talloc_asprintf(tmp_ctx, "%cID %lu",
 696                                         map->xid.type == ID_TYPE_UID?'U':'G',
 697                                         (unsigned long)map->xid.id);
 698                 if (idstr == NULL) {
 699                         ret = NT_STATUS_NO_MEMORY;
 700                         goto done;
 701                 }
 702
 703                 store_state.ksidstr = keystr;
 704                 store_state.kidstr = idstr;
 705
 706                 ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 707                                       &store_state);
 708                 goto done;
 709         }
 710
 711         /* What type of record is this ? */
 712         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 713                 map->xid.id = rec_id;
 714                 map->xid.type = ID_TYPE_UID;
 715                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 716                 ret = NT_STATUS_OK;
 717
 718         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 719                 map->xid.id = rec_id;
 720                 map->xid.type = ID_TYPE_GID;
 721                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 722                 ret = NT_STATUS_OK;
 723
 724         } else { /* Unknown record type ! */
 725                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 726                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 727                 goto done;
 728         }
 729
 730         /* apply filters before returning result */
 731         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 732                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 733                                 map->xid.id, dom->low_id, dom->high_id));
 734                 ret = NT_STATUS_NONE_MAPPED;
 735         }
 736
 737 done:
 738         talloc_free(tmp_ctx);
 739         return ret;
 740 }
 741
 742 /*
 743   lookup a set of unix ids.
 744 */
 745 static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 746 {
 747         NTSTATUS ret;
 748         int i;
 749
 750         /* initialize the status to avoid suprise */
 751         for (i = 0; ids[i]; i++) {
 752                 ids[i]->status = ID_UNKNOWN;
 753         }
 754
 755         for (i = 0; ids[i]; i++) {
 756                 ret = idmap_tdb2_id_to_sid(dom, ids[i]);
 757                 if ( ! NT_STATUS_IS_OK(ret)) {
 758
 759                         /* if it is just a failed mapping continue */
 760                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 761
 762                                 /* make sure it is marked as unmapped */
 763                                 ids[i]->status = ID_UNMAPPED;
 764                                 continue;
 765                         }
 766
 767                         /* some fatal error occurred, return immediately */
 768                         goto done;
 769                 }
 770
 771                 /* all ok, id is mapped */
 772                 ids[i]->status = ID_MAPPED;
 773         }
 774
 775         ret = NT_STATUS_OK;
 776
 777 done:
 778         return ret;
 779 }
 780
 781 /*
 782   lookup a set of sids.
 783 */
 784
 785 struct idmap_tdb2_sids_to_unixids_context {
 786         struct idmap_domain *dom;
 787         struct id_map **ids;
 788         bool allocate_unmapped;
 789 };
 790
 791 static NTSTATUS idmap_tdb2_sids_to_unixids_action(struct db_context *db,
 792                                                   void *private_data)
 793 {
 794         struct idmap_tdb2_sids_to_unixids_context *state;
 795         int i;
 796         NTSTATUS ret = NT_STATUS_OK;
 797
 798         state = (struct idmap_tdb2_sids_to_unixids_context *)private_data;
 799
 800         DEBUG(10, ("idmap_tdb2_sids_to_unixids_action: "
 801                    " domain: [%s], allocate: %s\n",
 802                    state->dom->name,
 803                    state->allocate_unmapped ? "yes" : "no"));
 804
 805         for (i = 0; state->ids[i]; i++) {
 806                 if ((state->ids[i]->status == ID_UNKNOWN) ||
 807                     /* retry if we could not map in previous run: */
 808                     (state->ids[i]->status == ID_UNMAPPED))
 809                 {
 810                         NTSTATUS ret2;
 811
 812                         ret2 = idmap_tdb2_sid_to_id(state->dom, state->ids[i]);
 813                         if (!NT_STATUS_IS_OK(ret2)) {
 814
 815                                 /* if it is just a failed mapping, continue */
 816                                 if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
 817
 818                                         /* make sure it is marked as unmapped */
 819                                         state->ids[i]->status = ID_UNMAPPED;
 820                                         ret = STATUS_SOME_UNMAPPED;
 821                                 } else {
 822                                         /* some fatal error occurred, return immediately */
 823                                         ret = ret2;
 824                                         goto done;
 825                                 }
 826                         } else {
 827                                 /* all ok, id is mapped */
 828                                 state->ids[i]->status = ID_MAPPED;
 829                         }
 830                 }
 831
 832                 if ((state->ids[i]->status == ID_UNMAPPED) &&
 833                     state->allocate_unmapped)
 834                 {
 835                         ret = idmap_tdb2_new_mapping(state->dom, state->ids[i]);
 836                         if (!NT_STATUS_IS_OK(ret)) {
 837                                 goto done;
 838                         }
 839                 }
 840         }
 841
 842 done:
 843         return ret;
 844 }
 845
 846 static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 847 {
 848         NTSTATUS ret;
 849         int i;
 850         struct idmap_tdb2_sids_to_unixids_context state;
 851         struct idmap_tdb2_context *ctx;
 852
 853         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 854
 855         /* initialize the status to avoid suprise */
 856         for (i = 0; ids[i]; i++) {
 857                 ids[i]->status = ID_UNKNOWN;
 858         }
 859
 860         state.dom = dom;
 861         state.ids = ids;
 862         state.allocate_unmapped = false;
 863
 864         ret = idmap_tdb2_sids_to_unixids_action(ctx->db, &state);
 865
 866         if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) && !dom->read_only) {
 867                 state.allocate_unmapped = true;
 868                 ret = dbwrap_trans_do(ctx->db,
 869                                       idmap_tdb2_sids_to_unixids_action,
 870                                       &state);
 871         }
 872
 873         return ret;
 874 }
 875
 876
 877 static struct idmap_methods db_methods = {
 878         .init            = idmap_tdb2_db_init,
 879         .unixids_to_sids = idmap_tdb2_unixids_to_sids,
 880         .sids_to_unixids = idmap_tdb2_sids_to_unixids,
 881         .allocate_id     = idmap_tdb2_get_new_id
 882 };
 883
 884 NTSTATUS idmap_tdb2_init(void)
 885 {
 886         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
 887 }